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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/net
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/net')
-rw-r--r--qemu/net/Makefile.objs15
-rw-r--r--qemu/net/checksum.c115
-rw-r--r--qemu/net/clients.h65
-rw-r--r--qemu/net/dump.c186
-rw-r--r--qemu/net/eth.c217
-rw-r--r--qemu/net/hub.c354
-rw-r--r--qemu/net/hub.h26
-rw-r--r--qemu/net/l2tpv3.c744
-rw-r--r--qemu/net/net.c1459
-rw-r--r--qemu/net/netmap.c463
-rw-r--r--qemu/net/queue.c272
-rw-r--r--qemu/net/slirp.c805
-rw-r--r--qemu/net/socket.c774
-rw-r--r--qemu/net/tap-aix.c87
-rw-r--r--qemu/net/tap-bsd.c227
-rw-r--r--qemu/net/tap-haiku.c86
-rw-r--r--qemu/net/tap-linux.c314
-rw-r--r--qemu/net/tap-linux.h54
-rw-r--r--qemu/net/tap-solaris.c254
-rw-r--r--qemu/net/tap-win32.c793
-rw-r--r--qemu/net/tap.c930
-rw-r--r--qemu/net/tap_int.h49
-rw-r--r--qemu/net/util.c60
-rw-r--r--qemu/net/util.h32
-rw-r--r--qemu/net/vde.c128
-rw-r--r--qemu/net/vhost-user.c248
26 files changed, 8757 insertions, 0 deletions
diff --git a/qemu/net/Makefile.objs b/qemu/net/Makefile.objs
new file mode 100644
index 000000000..ec19cb31d
--- /dev/null
+++ b/qemu/net/Makefile.objs
@@ -0,0 +1,15 @@
+common-obj-y = net.o queue.o checksum.o util.o hub.o
+common-obj-y += socket.o
+common-obj-y += dump.o
+common-obj-y += eth.o
+common-obj-$(CONFIG_L2TPV3) += l2tpv3.o
+common-obj-$(CONFIG_POSIX) += tap.o vhost-user.o
+common-obj-$(CONFIG_LINUX) += tap-linux.o
+common-obj-$(CONFIG_WIN32) += tap-win32.o
+common-obj-$(CONFIG_BSD) += tap-bsd.o
+common-obj-$(CONFIG_SOLARIS) += tap-solaris.o
+common-obj-$(CONFIG_AIX) += tap-aix.o
+common-obj-$(CONFIG_HAIKU) += tap-haiku.o
+common-obj-$(CONFIG_SLIRP) += slirp.o
+common-obj-$(CONFIG_VDE) += vde.o
+common-obj-$(CONFIG_NETMAP) += netmap.o
diff --git a/qemu/net/checksum.c b/qemu/net/checksum.c
new file mode 100644
index 000000000..14c08550e
--- /dev/null
+++ b/qemu/net/checksum.c
@@ -0,0 +1,115 @@
+/*
+ * IP checksumming functions.
+ * (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 or later of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu-common.h"
+#include "net/checksum.h"
+
+#define PROTO_TCP 6
+#define PROTO_UDP 17
+
+uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq)
+{
+ uint32_t sum = 0;
+ int i;
+
+ for (i = seq; i < seq + len; i++) {
+ if (i & 1) {
+ sum += (uint32_t)buf[i - seq];
+ } else {
+ sum += (uint32_t)buf[i - seq] << 8;
+ }
+ }
+ return sum;
+}
+
+uint16_t net_checksum_finish(uint32_t sum)
+{
+ while (sum>>16)
+ sum = (sum & 0xFFFF)+(sum >> 16);
+ return ~sum;
+}
+
+uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto,
+ uint8_t *addrs, uint8_t *buf)
+{
+ uint32_t sum = 0;
+
+ sum += net_checksum_add(length, buf); // payload
+ sum += net_checksum_add(8, addrs); // src + dst address
+ sum += proto + length; // protocol & length
+ return net_checksum_finish(sum);
+}
+
+void net_checksum_calculate(uint8_t *data, int length)
+{
+ int hlen, plen, proto, csum_offset;
+ uint16_t csum;
+
+ if ((data[14] & 0xf0) != 0x40)
+ return; /* not IPv4 */
+ hlen = (data[14] & 0x0f) * 4;
+ plen = (data[16] << 8 | data[17]) - hlen;
+ proto = data[23];
+
+ switch (proto) {
+ case PROTO_TCP:
+ csum_offset = 16;
+ break;
+ case PROTO_UDP:
+ csum_offset = 6;
+ break;
+ default:
+ return;
+ }
+
+ if (plen < csum_offset+2)
+ return;
+
+ data[14+hlen+csum_offset] = 0;
+ data[14+hlen+csum_offset+1] = 0;
+ csum = net_checksum_tcpudp(plen, proto, data+14+12, data+14+hlen);
+ data[14+hlen+csum_offset] = csum >> 8;
+ data[14+hlen+csum_offset+1] = csum & 0xff;
+}
+
+uint32_t
+net_checksum_add_iov(const struct iovec *iov, const unsigned int iov_cnt,
+ uint32_t iov_off, uint32_t size)
+{
+ size_t iovec_off, buf_off;
+ unsigned int i;
+ uint32_t res = 0;
+ uint32_t seq = 0;
+
+ iovec_off = 0;
+ buf_off = 0;
+ for (i = 0; i < iov_cnt && size; i++) {
+ if (iov_off < (iovec_off + iov[i].iov_len)) {
+ size_t len = MIN((iovec_off + iov[i].iov_len) - iov_off , size);
+ void *chunk_buf = iov[i].iov_base + (iov_off - iovec_off);
+
+ res += net_checksum_add_cont(len, chunk_buf, seq);
+ seq += len;
+
+ buf_off += len;
+ iov_off += len;
+ size -= len;
+ }
+ iovec_off += iov[i].iov_len;
+ }
+ return res;
+}
diff --git a/qemu/net/clients.h b/qemu/net/clients.h
new file mode 100644
index 000000000..d47530e82
--- /dev/null
+++ b/qemu/net/clients.h
@@ -0,0 +1,65 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef QEMU_NET_CLIENTS_H
+#define QEMU_NET_CLIENTS_H
+
+#include "net/net.h"
+#include "qapi-types.h"
+
+int net_init_dump(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+#ifdef CONFIG_SLIRP
+int net_init_slirp(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+#endif
+
+int net_init_hubport(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+int net_init_socket(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+int net_init_tap(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+int net_init_bridge(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+int net_init_l2tpv3(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+#ifdef CONFIG_VDE
+int net_init_vde(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+#endif
+
+#ifdef CONFIG_NETMAP
+int net_init_netmap(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+#endif
+
+int net_init_vhost_user(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp);
+
+#endif /* QEMU_NET_CLIENTS_H */
diff --git a/qemu/net/dump.c b/qemu/net/dump.c
new file mode 100644
index 000000000..02c8064be
--- /dev/null
+++ b/qemu/net/dump.c
@@ -0,0 +1,186 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "clients.h"
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qemu/timer.h"
+#include "hub.h"
+
+typedef struct DumpState {
+ NetClientState nc;
+ int64_t start_ts;
+ int fd;
+ int pcap_caplen;
+} DumpState;
+
+#define PCAP_MAGIC 0xa1b2c3d4
+
+struct pcap_file_hdr {
+ uint32_t magic;
+ uint16_t version_major;
+ uint16_t version_minor;
+ int32_t thiszone;
+ uint32_t sigfigs;
+ uint32_t snaplen;
+ uint32_t linktype;
+};
+
+struct pcap_sf_pkthdr {
+ struct {
+ int32_t tv_sec;
+ int32_t tv_usec;
+ } ts;
+ uint32_t caplen;
+ uint32_t len;
+};
+
+static ssize_t dump_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ DumpState *s = DO_UPCAST(DumpState, nc, nc);
+ struct pcap_sf_pkthdr hdr;
+ int64_t ts;
+ int caplen;
+
+ /* Early return in case of previous error. */
+ if (s->fd < 0) {
+ return size;
+ }
+
+ ts = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 1000000, get_ticks_per_sec());
+ caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
+
+ hdr.ts.tv_sec = ts / 1000000 + s->start_ts;
+ hdr.ts.tv_usec = ts % 1000000;
+ hdr.caplen = caplen;
+ hdr.len = size;
+ if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
+ write(s->fd, buf, caplen) != caplen) {
+ qemu_log("-net dump write error - stop dump\n");
+ close(s->fd);
+ s->fd = -1;
+ }
+
+ return size;
+}
+
+static void dump_cleanup(NetClientState *nc)
+{
+ DumpState *s = DO_UPCAST(DumpState, nc, nc);
+
+ close(s->fd);
+}
+
+static NetClientInfo net_dump_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_DUMP,
+ .size = sizeof(DumpState),
+ .receive = dump_receive,
+ .cleanup = dump_cleanup,
+};
+
+static int net_dump_init(NetClientState *peer, const char *device,
+ const char *name, const char *filename, int len,
+ Error **errp)
+{
+ struct pcap_file_hdr hdr;
+ NetClientState *nc;
+ DumpState *s;
+ struct tm tm;
+ int fd;
+
+ fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0644);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "-net dump: can't open %s", filename);
+ return -1;
+ }
+
+ hdr.magic = PCAP_MAGIC;
+ hdr.version_major = 2;
+ hdr.version_minor = 4;
+ hdr.thiszone = 0;
+ hdr.sigfigs = 0;
+ hdr.snaplen = len;
+ hdr.linktype = 1;
+
+ if (write(fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
+ error_setg_errno(errp, errno, "-net dump write error");
+ close(fd);
+ return -1;
+ }
+
+ nc = qemu_new_net_client(&net_dump_info, peer, device, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "dump to %s (len=%d)", filename, len);
+
+ s = DO_UPCAST(DumpState, nc, nc);
+
+ s->fd = fd;
+ s->pcap_caplen = len;
+
+ qemu_get_timedate(&tm, 0);
+ s->start_ts = mktime(&tm);
+
+ return 0;
+}
+
+int net_init_dump(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ int len;
+ const char *file;
+ char def_file[128];
+ const NetdevDumpOptions *dump;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP);
+ dump = opts->dump;
+
+ assert(peer);
+
+ if (dump->has_file) {
+ file = dump->file;
+ } else {
+ int id;
+ int ret;
+
+ ret = net_hub_id_for_client(peer, &id);
+ assert(ret == 0); /* peer must be on a hub */
+
+ snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", id);
+ file = def_file;
+ }
+
+ if (dump->has_len) {
+ if (dump->len > INT_MAX) {
+ error_setg(errp, "invalid length: %"PRIu64, dump->len);
+ return -1;
+ }
+ len = dump->len;
+ } else {
+ len = 65536;
+ }
+
+ return net_dump_init(peer, "dump", name, file, len, errp);
+}
diff --git a/qemu/net/eth.c b/qemu/net/eth.c
new file mode 100644
index 000000000..7c61132cb
--- /dev/null
+++ b/qemu/net/eth.c
@@ -0,0 +1,217 @@
+/*
+ * QEMU network structures definitions and helper functions
+ *
+ * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Dmitry Fleytman <dmitry@daynix.com>
+ * Tamir Shomer <tamirs@daynix.com>
+ * Yan Vugenfirer <yan@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "net/eth.h"
+#include "net/checksum.h"
+#include "qemu-common.h"
+#include "net/tap.h"
+
+void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
+ bool *is_new)
+{
+ struct vlan_header *vhdr = PKT_GET_VLAN_HDR(ehdr);
+
+ switch (be16_to_cpu(ehdr->h_proto)) {
+ case ETH_P_VLAN:
+ case ETH_P_DVLAN:
+ /* vlan hdr exists */
+ *is_new = false;
+ break;
+
+ default:
+ /* No VLAN header, put a new one */
+ vhdr->h_proto = ehdr->h_proto;
+ ehdr->h_proto = cpu_to_be16(ETH_P_VLAN);
+ *is_new = true;
+ break;
+ }
+ vhdr->h_tci = cpu_to_be16(vlan_tag);
+}
+
+uint8_t
+eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto)
+{
+ uint8_t ecn_state = 0;
+
+ if (l3_proto == ETH_P_IP) {
+ struct ip_header *iphdr = (struct ip_header *) l3_hdr;
+
+ if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) {
+ if (IPTOS_ECN(iphdr->ip_tos) == IPTOS_ECN_CE) {
+ ecn_state = VIRTIO_NET_HDR_GSO_ECN;
+ }
+ if (l4proto == IP_PROTO_TCP) {
+ return VIRTIO_NET_HDR_GSO_TCPV4 | ecn_state;
+ } else if (l4proto == IP_PROTO_UDP) {
+ return VIRTIO_NET_HDR_GSO_UDP | ecn_state;
+ }
+ }
+ } else if (l3_proto == ETH_P_IPV6) {
+ struct ip6_header *ip6hdr = (struct ip6_header *) l3_hdr;
+
+ if (IP6_ECN(ip6hdr->ip6_ecn_acc) == IP6_ECN_CE) {
+ ecn_state = VIRTIO_NET_HDR_GSO_ECN;
+ }
+
+ if (l4proto == IP_PROTO_TCP) {
+ return VIRTIO_NET_HDR_GSO_TCPV6 | ecn_state;
+ }
+ }
+
+ /* Unsupported offload */
+ g_assert_not_reached();
+
+ return VIRTIO_NET_HDR_GSO_NONE | ecn_state;
+}
+
+void eth_get_protocols(const uint8_t *headers,
+ uint32_t hdr_length,
+ bool *isip4, bool *isip6,
+ bool *isudp, bool *istcp)
+{
+ int proto;
+ size_t l2hdr_len = eth_get_l2_hdr_length(headers);
+ assert(hdr_length >= eth_get_l2_hdr_length(headers));
+ *isip4 = *isip6 = *isudp = *istcp = false;
+
+ proto = eth_get_l3_proto(headers, l2hdr_len);
+ if (proto == ETH_P_IP) {
+ *isip4 = true;
+
+ struct ip_header *iphdr;
+
+ assert(hdr_length >=
+ eth_get_l2_hdr_length(headers) + sizeof(struct ip_header));
+
+ iphdr = PKT_GET_IP_HDR(headers);
+
+ if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) {
+ if (iphdr->ip_p == IP_PROTO_TCP) {
+ *istcp = true;
+ } else if (iphdr->ip_p == IP_PROTO_UDP) {
+ *isudp = true;
+ }
+ }
+ } else if (proto == ETH_P_IPV6) {
+ uint8_t l4proto;
+ size_t full_ip6hdr_len;
+
+ struct iovec hdr_vec;
+ hdr_vec.iov_base = (void *) headers;
+ hdr_vec.iov_len = hdr_length;
+
+ *isip6 = true;
+ if (eth_parse_ipv6_hdr(&hdr_vec, 1, l2hdr_len,
+ &l4proto, &full_ip6hdr_len)) {
+ if (l4proto == IP_PROTO_TCP) {
+ *istcp = true;
+ } else if (l4proto == IP_PROTO_UDP) {
+ *isudp = true;
+ }
+ }
+ }
+}
+
+void
+eth_setup_ip4_fragmentation(const void *l2hdr, size_t l2hdr_len,
+ void *l3hdr, size_t l3hdr_len,
+ size_t l3payload_len,
+ size_t frag_offset, bool more_frags)
+{
+ if (eth_get_l3_proto(l2hdr, l2hdr_len) == ETH_P_IP) {
+ uint16_t orig_flags;
+ struct ip_header *iphdr = (struct ip_header *) l3hdr;
+ uint16_t frag_off_units = frag_offset / IP_FRAG_UNIT_SIZE;
+ uint16_t new_ip_off;
+
+ assert(frag_offset % IP_FRAG_UNIT_SIZE == 0);
+ assert((frag_off_units & ~IP_OFFMASK) == 0);
+
+ orig_flags = be16_to_cpu(iphdr->ip_off) & ~(IP_OFFMASK|IP_MF);
+ new_ip_off = frag_off_units | orig_flags | (more_frags ? IP_MF : 0);
+ iphdr->ip_off = cpu_to_be16(new_ip_off);
+ iphdr->ip_len = cpu_to_be16(l3payload_len + l3hdr_len);
+ }
+}
+
+void
+eth_fix_ip4_checksum(void *l3hdr, size_t l3hdr_len)
+{
+ struct ip_header *iphdr = (struct ip_header *) l3hdr;
+ iphdr->ip_sum = 0;
+ iphdr->ip_sum = cpu_to_be16(net_raw_checksum(l3hdr, l3hdr_len));
+}
+
+uint32_t
+eth_calc_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl)
+{
+ struct ip_pseudo_header ipph;
+ ipph.ip_src = iphdr->ip_src;
+ ipph.ip_dst = iphdr->ip_dst;
+ ipph.ip_payload = cpu_to_be16(csl);
+ ipph.ip_proto = iphdr->ip_p;
+ ipph.zeros = 0;
+ return net_checksum_add(sizeof(ipph), (uint8_t *) &ipph);
+}
+
+static bool
+eth_is_ip6_extension_header_type(uint8_t hdr_type)
+{
+ switch (hdr_type) {
+ case IP6_HOP_BY_HOP:
+ case IP6_ROUTING:
+ case IP6_FRAGMENT:
+ case IP6_ESP:
+ case IP6_AUTHENTICATION:
+ case IP6_DESTINATON:
+ case IP6_MOBILITY:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool eth_parse_ipv6_hdr(struct iovec *pkt, int pkt_frags,
+ size_t ip6hdr_off, uint8_t *l4proto,
+ size_t *full_hdr_len)
+{
+ struct ip6_header ip6_hdr;
+ struct ip6_ext_hdr ext_hdr;
+ size_t bytes_read;
+
+ bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off,
+ &ip6_hdr, sizeof(ip6_hdr));
+ if (bytes_read < sizeof(ip6_hdr)) {
+ return false;
+ }
+
+ *full_hdr_len = sizeof(struct ip6_header);
+
+ if (!eth_is_ip6_extension_header_type(ip6_hdr.ip6_nxt)) {
+ *l4proto = ip6_hdr.ip6_nxt;
+ return true;
+ }
+
+ do {
+ bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off + *full_hdr_len,
+ &ext_hdr, sizeof(ext_hdr));
+ *full_hdr_len += (ext_hdr.ip6r_len + 1) * IP6_EXT_GRANULARITY;
+ } while (eth_is_ip6_extension_header_type(ext_hdr.ip6r_nxt));
+
+ *l4proto = ext_hdr.ip6r_nxt;
+ return true;
+}
diff --git a/qemu/net/hub.c b/qemu/net/hub.c
new file mode 100644
index 000000000..3047f1276
--- /dev/null
+++ b/qemu/net/hub.c
@@ -0,0 +1,354 @@
+/*
+ * Hub net client
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
+ * Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include "monitor/monitor.h"
+#include "net/net.h"
+#include "clients.h"
+#include "hub.h"
+#include "qemu/iov.h"
+
+/*
+ * A hub broadcasts incoming packets to all its ports except the source port.
+ * Hubs can be used to provide independent network segments, also confusingly
+ * named the QEMU 'vlan' feature.
+ */
+
+typedef struct NetHub NetHub;
+
+typedef struct NetHubPort {
+ NetClientState nc;
+ QLIST_ENTRY(NetHubPort) next;
+ NetHub *hub;
+ int id;
+} NetHubPort;
+
+struct NetHub {
+ int id;
+ QLIST_ENTRY(NetHub) next;
+ int num_ports;
+ QLIST_HEAD(, NetHubPort) ports;
+};
+
+static QLIST_HEAD(, NetHub) hubs = QLIST_HEAD_INITIALIZER(&hubs);
+
+static ssize_t net_hub_receive(NetHub *hub, NetHubPort *source_port,
+ const uint8_t *buf, size_t len)
+{
+ NetHubPort *port;
+
+ QLIST_FOREACH(port, &hub->ports, next) {
+ if (port == source_port) {
+ continue;
+ }
+
+ qemu_send_packet(&port->nc, buf, len);
+ }
+ return len;
+}
+
+static ssize_t net_hub_receive_iov(NetHub *hub, NetHubPort *source_port,
+ const struct iovec *iov, int iovcnt)
+{
+ NetHubPort *port;
+ ssize_t len = iov_size(iov, iovcnt);
+
+ QLIST_FOREACH(port, &hub->ports, next) {
+ if (port == source_port) {
+ continue;
+ }
+
+ qemu_sendv_packet(&port->nc, iov, iovcnt);
+ }
+ return len;
+}
+
+static NetHub *net_hub_new(int id)
+{
+ NetHub *hub;
+
+ hub = g_malloc(sizeof(*hub));
+ hub->id = id;
+ hub->num_ports = 0;
+ QLIST_INIT(&hub->ports);
+
+ QLIST_INSERT_HEAD(&hubs, hub, next);
+
+ return hub;
+}
+
+static int net_hub_port_can_receive(NetClientState *nc)
+{
+ NetHubPort *port;
+ NetHubPort *src_port = DO_UPCAST(NetHubPort, nc, nc);
+ NetHub *hub = src_port->hub;
+
+ QLIST_FOREACH(port, &hub->ports, next) {
+ if (port == src_port) {
+ continue;
+ }
+
+ if (qemu_can_send_packet(&port->nc)) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static ssize_t net_hub_port_receive(NetClientState *nc,
+ const uint8_t *buf, size_t len)
+{
+ NetHubPort *port = DO_UPCAST(NetHubPort, nc, nc);
+
+ return net_hub_receive(port->hub, port, buf, len);
+}
+
+static ssize_t net_hub_port_receive_iov(NetClientState *nc,
+ const struct iovec *iov, int iovcnt)
+{
+ NetHubPort *port = DO_UPCAST(NetHubPort, nc, nc);
+
+ return net_hub_receive_iov(port->hub, port, iov, iovcnt);
+}
+
+static void net_hub_port_cleanup(NetClientState *nc)
+{
+ NetHubPort *port = DO_UPCAST(NetHubPort, nc, nc);
+
+ QLIST_REMOVE(port, next);
+}
+
+static NetClientInfo net_hub_port_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_HUBPORT,
+ .size = sizeof(NetHubPort),
+ .can_receive = net_hub_port_can_receive,
+ .receive = net_hub_port_receive,
+ .receive_iov = net_hub_port_receive_iov,
+ .cleanup = net_hub_port_cleanup,
+};
+
+static NetHubPort *net_hub_port_new(NetHub *hub, const char *name)
+{
+ NetClientState *nc;
+ NetHubPort *port;
+ int id = hub->num_ports++;
+ char default_name[128];
+
+ if (!name) {
+ snprintf(default_name, sizeof(default_name),
+ "hub%dport%d", hub->id, id);
+ name = default_name;
+ }
+
+ nc = qemu_new_net_client(&net_hub_port_info, NULL, "hub", name);
+ port = DO_UPCAST(NetHubPort, nc, nc);
+ port->id = id;
+ port->hub = hub;
+
+ QLIST_INSERT_HEAD(&hub->ports, port, next);
+
+ return port;
+}
+
+/**
+ * Create a port on a given hub
+ * @name: Net client name or NULL for default name.
+ *
+ * If there is no existing hub with the given id then a new hub is created.
+ */
+NetClientState *net_hub_add_port(int hub_id, const char *name)
+{
+ NetHub *hub;
+ NetHubPort *port;
+
+ QLIST_FOREACH(hub, &hubs, next) {
+ if (hub->id == hub_id) {
+ break;
+ }
+ }
+
+ if (!hub) {
+ hub = net_hub_new(hub_id);
+ }
+
+ port = net_hub_port_new(hub, name);
+ return &port->nc;
+}
+
+/**
+ * Find a specific client on a hub
+ */
+NetClientState *net_hub_find_client_by_name(int hub_id, const char *name)
+{
+ NetHub *hub;
+ NetHubPort *port;
+ NetClientState *peer;
+
+ QLIST_FOREACH(hub, &hubs, next) {
+ if (hub->id == hub_id) {
+ QLIST_FOREACH(port, &hub->ports, next) {
+ peer = port->nc.peer;
+
+ if (peer && strcmp(peer->name, name) == 0) {
+ return peer;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+/**
+ * Find a available port on a hub; otherwise create one new port
+ */
+NetClientState *net_hub_port_find(int hub_id)
+{
+ NetHub *hub;
+ NetHubPort *port;
+ NetClientState *nc;
+
+ QLIST_FOREACH(hub, &hubs, next) {
+ if (hub->id == hub_id) {
+ QLIST_FOREACH(port, &hub->ports, next) {
+ nc = port->nc.peer;
+ if (!nc) {
+ return &(port->nc);
+ }
+ }
+ break;
+ }
+ }
+
+ nc = net_hub_add_port(hub_id, NULL);
+ return nc;
+}
+
+/**
+ * Print hub configuration
+ */
+void net_hub_info(Monitor *mon)
+{
+ NetHub *hub;
+ NetHubPort *port;
+
+ QLIST_FOREACH(hub, &hubs, next) {
+ monitor_printf(mon, "hub %d\n", hub->id);
+ QLIST_FOREACH(port, &hub->ports, next) {
+ monitor_printf(mon, " \\ %s", port->nc.name);
+ if (port->nc.peer) {
+ monitor_printf(mon, ": ");
+ print_net_client(mon, port->nc.peer);
+ } else {
+ monitor_printf(mon, "\n");
+ }
+ }
+ }
+}
+
+/**
+ * Get the hub id that a client is connected to
+ *
+ * @id: Pointer for hub id output, may be NULL
+ */
+int net_hub_id_for_client(NetClientState *nc, int *id)
+{
+ NetHubPort *port;
+
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ port = DO_UPCAST(NetHubPort, nc, nc);
+ } else if (nc->peer != NULL && nc->peer->info->type ==
+ NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ port = DO_UPCAST(NetHubPort, nc, nc->peer);
+ } else {
+ return -ENOENT;
+ }
+
+ if (id) {
+ *id = port->hub->id;
+ }
+ return 0;
+}
+
+int net_init_hubport(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevHubPortOptions *hubport;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT);
+ assert(!peer);
+ hubport = opts->hubport;
+
+ net_hub_add_port(hubport->hubid, name);
+ return 0;
+}
+
+/**
+ * Warn if hub configurations are likely wrong
+ */
+void net_hub_check_clients(void)
+{
+ NetHub *hub;
+ NetHubPort *port;
+ NetClientState *peer;
+
+ QLIST_FOREACH(hub, &hubs, next) {
+ int has_nic = 0, has_host_dev = 0;
+
+ QLIST_FOREACH(port, &hub->ports, next) {
+ peer = port->nc.peer;
+ if (!peer) {
+ fprintf(stderr, "Warning: hub port %s has no peer\n",
+ port->nc.name);
+ continue;
+ }
+
+ switch (peer->info->type) {
+ case NET_CLIENT_OPTIONS_KIND_NIC:
+ has_nic = 1;
+ break;
+ case NET_CLIENT_OPTIONS_KIND_USER:
+ case NET_CLIENT_OPTIONS_KIND_TAP:
+ case NET_CLIENT_OPTIONS_KIND_SOCKET:
+ case NET_CLIENT_OPTIONS_KIND_VDE:
+ case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
+ has_host_dev = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ if (has_host_dev && !has_nic) {
+ fprintf(stderr, "Warning: vlan %d with no nics\n", hub->id);
+ }
+ if (has_nic && !has_host_dev) {
+ fprintf(stderr,
+ "Warning: vlan %d is not connected to host network\n",
+ hub->id);
+ }
+ }
+}
+
+bool net_hub_flush(NetClientState *nc)
+{
+ NetHubPort *port;
+ NetHubPort *source_port = DO_UPCAST(NetHubPort, nc, nc);
+ int ret = 0;
+
+ QLIST_FOREACH(port, &source_port->hub->ports, next) {
+ if (port != source_port) {
+ ret += qemu_net_queue_flush(port->nc.incoming_queue);
+ }
+ }
+ return ret ? true : false;
+}
diff --git a/qemu/net/hub.h b/qemu/net/hub.h
new file mode 100644
index 000000000..a625effe0
--- /dev/null
+++ b/qemu/net/hub.h
@@ -0,0 +1,26 @@
+/*
+ * Hub net client
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
+ * Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#ifndef NET_HUB_H
+#define NET_HUB_H
+
+#include "qemu-common.h"
+
+NetClientState *net_hub_add_port(int hub_id, const char *name);
+NetClientState *net_hub_find_client_by_name(int hub_id, const char *name);
+void net_hub_info(Monitor *mon);
+void net_hub_check_clients(void);
+bool net_hub_flush(NetClientState *nc);
+
+#endif /* NET_HUB_H */
diff --git a/qemu/net/l2tpv3.c b/qemu/net/l2tpv3.c
new file mode 100644
index 000000000..4f9bceecc
--- /dev/null
+++ b/qemu/net/l2tpv3.c
@@ -0,0 +1,744 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2012-2014 Cisco Systems
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <linux/ip.h>
+#include <netdb.h>
+#include "config-host.h"
+#include "net/net.h"
+#include "clients.h"
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/sockets.h"
+#include "qemu/iov.h"
+#include "qemu/main-loop.h"
+
+
+/* The buffer size needs to be investigated for optimum numbers and
+ * optimum means of paging in on different systems. This size is
+ * chosen to be sufficient to accommodate one packet with some headers
+ */
+
+#define BUFFER_ALIGN sysconf(_SC_PAGESIZE)
+#define BUFFER_SIZE 2048
+#define IOVSIZE 2
+#define MAX_L2TPV3_MSGCNT 64
+#define MAX_L2TPV3_IOVCNT (MAX_L2TPV3_MSGCNT * IOVSIZE)
+
+/* Header set to 0x30000 signifies a data packet */
+
+#define L2TPV3_DATA_PACKET 0x30000
+
+/* IANA-assigned IP protocol ID for L2TPv3 */
+
+#ifndef IPPROTO_L2TP
+#define IPPROTO_L2TP 0x73
+#endif
+
+typedef struct NetL2TPV3State {
+ NetClientState nc;
+ int fd;
+
+ /*
+ * these are used for xmit - that happens packet a time
+ * and for first sign of life packet (easier to parse that once)
+ */
+
+ uint8_t *header_buf;
+ struct iovec *vec;
+
+ /*
+ * these are used for receive - try to "eat" up to 32 packets at a time
+ */
+
+ struct mmsghdr *msgvec;
+
+ /*
+ * peer address
+ */
+
+ struct sockaddr_storage *dgram_dst;
+ uint32_t dst_size;
+
+ /*
+ * L2TPv3 parameters
+ */
+
+ uint64_t rx_cookie;
+ uint64_t tx_cookie;
+ uint32_t rx_session;
+ uint32_t tx_session;
+ uint32_t header_size;
+ uint32_t counter;
+
+ /*
+ * DOS avoidance in error handling
+ */
+
+ bool header_mismatch;
+
+ /*
+ * Ring buffer handling
+ */
+
+ int queue_head;
+ int queue_tail;
+ int queue_depth;
+
+ /*
+ * Precomputed offsets
+ */
+
+ uint32_t offset;
+ uint32_t cookie_offset;
+ uint32_t counter_offset;
+ uint32_t session_offset;
+
+ /* Poll Control */
+
+ bool read_poll;
+ bool write_poll;
+
+ /* Flags */
+
+ bool ipv6;
+ bool udp;
+ bool has_counter;
+ bool pin_counter;
+ bool cookie;
+ bool cookie_is_64;
+
+} NetL2TPV3State;
+
+static void net_l2tpv3_send(void *opaque);
+static void l2tpv3_writable(void *opaque);
+
+static void l2tpv3_update_fd_handler(NetL2TPV3State *s)
+{
+ qemu_set_fd_handler(s->fd,
+ s->read_poll ? net_l2tpv3_send : NULL,
+ s->write_poll ? l2tpv3_writable : NULL,
+ s);
+}
+
+static void l2tpv3_read_poll(NetL2TPV3State *s, bool enable)
+{
+ if (s->read_poll != enable) {
+ s->read_poll = enable;
+ l2tpv3_update_fd_handler(s);
+ }
+}
+
+static void l2tpv3_write_poll(NetL2TPV3State *s, bool enable)
+{
+ if (s->write_poll != enable) {
+ s->write_poll = enable;
+ l2tpv3_update_fd_handler(s);
+ }
+}
+
+static void l2tpv3_writable(void *opaque)
+{
+ NetL2TPV3State *s = opaque;
+ l2tpv3_write_poll(s, false);
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static void l2tpv3_send_completed(NetClientState *nc, ssize_t len)
+{
+ NetL2TPV3State *s = DO_UPCAST(NetL2TPV3State, nc, nc);
+ l2tpv3_read_poll(s, true);
+}
+
+static void l2tpv3_poll(NetClientState *nc, bool enable)
+{
+ NetL2TPV3State *s = DO_UPCAST(NetL2TPV3State, nc, nc);
+ l2tpv3_write_poll(s, enable);
+ l2tpv3_read_poll(s, enable);
+}
+
+static void l2tpv3_form_header(NetL2TPV3State *s)
+{
+ uint32_t *counter;
+
+ if (s->udp) {
+ stl_be_p((uint32_t *) s->header_buf, L2TPV3_DATA_PACKET);
+ }
+ stl_be_p(
+ (uint32_t *) (s->header_buf + s->session_offset),
+ s->tx_session
+ );
+ if (s->cookie) {
+ if (s->cookie_is_64) {
+ stq_be_p(
+ (uint64_t *)(s->header_buf + s->cookie_offset),
+ s->tx_cookie
+ );
+ } else {
+ stl_be_p(
+ (uint32_t *) (s->header_buf + s->cookie_offset),
+ s->tx_cookie
+ );
+ }
+ }
+ if (s->has_counter) {
+ counter = (uint32_t *)(s->header_buf + s->counter_offset);
+ if (s->pin_counter) {
+ *counter = 0;
+ } else {
+ stl_be_p(counter, ++s->counter);
+ }
+ }
+}
+
+static ssize_t net_l2tpv3_receive_dgram_iov(NetClientState *nc,
+ const struct iovec *iov,
+ int iovcnt)
+{
+ NetL2TPV3State *s = DO_UPCAST(NetL2TPV3State, nc, nc);
+
+ struct msghdr message;
+ int ret;
+
+ if (iovcnt > MAX_L2TPV3_IOVCNT - 1) {
+ error_report(
+ "iovec too long %d > %d, change l2tpv3.h",
+ iovcnt, MAX_L2TPV3_IOVCNT
+ );
+ return -1;
+ }
+ l2tpv3_form_header(s);
+ memcpy(s->vec + 1, iov, iovcnt * sizeof(struct iovec));
+ s->vec->iov_base = s->header_buf;
+ s->vec->iov_len = s->offset;
+ message.msg_name = s->dgram_dst;
+ message.msg_namelen = s->dst_size;
+ message.msg_iov = s->vec;
+ message.msg_iovlen = iovcnt + 1;
+ message.msg_control = NULL;
+ message.msg_controllen = 0;
+ message.msg_flags = 0;
+ do {
+ ret = sendmsg(s->fd, &message, 0);
+ } while ((ret == -1) && (errno == EINTR));
+ if (ret > 0) {
+ ret -= s->offset;
+ } else if (ret == 0) {
+ /* belt and braces - should not occur on DGRAM
+ * we should get an error and never a 0 send
+ */
+ ret = iov_size(iov, iovcnt);
+ } else {
+ /* signal upper layer that socket buffer is full */
+ ret = -errno;
+ if (ret == -EAGAIN || ret == -ENOBUFS) {
+ l2tpv3_write_poll(s, true);
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+static ssize_t net_l2tpv3_receive_dgram(NetClientState *nc,
+ const uint8_t *buf,
+ size_t size)
+{
+ NetL2TPV3State *s = DO_UPCAST(NetL2TPV3State, nc, nc);
+
+ struct iovec *vec;
+ struct msghdr message;
+ ssize_t ret = 0;
+
+ l2tpv3_form_header(s);
+ vec = s->vec;
+ vec->iov_base = s->header_buf;
+ vec->iov_len = s->offset;
+ vec++;
+ vec->iov_base = (void *) buf;
+ vec->iov_len = size;
+ message.msg_name = s->dgram_dst;
+ message.msg_namelen = s->dst_size;
+ message.msg_iov = s->vec;
+ message.msg_iovlen = 2;
+ message.msg_control = NULL;
+ message.msg_controllen = 0;
+ message.msg_flags = 0;
+ do {
+ ret = sendmsg(s->fd, &message, 0);
+ } while ((ret == -1) && (errno == EINTR));
+ if (ret > 0) {
+ ret -= s->offset;
+ } else if (ret == 0) {
+ /* belt and braces - should not occur on DGRAM
+ * we should get an error and never a 0 send
+ */
+ ret = size;
+ } else {
+ ret = -errno;
+ if (ret == -EAGAIN || ret == -ENOBUFS) {
+ /* signal upper layer that socket buffer is full */
+ l2tpv3_write_poll(s, true);
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+static int l2tpv3_verify_header(NetL2TPV3State *s, uint8_t *buf)
+{
+
+ uint32_t *session;
+ uint64_t cookie;
+
+ if ((!s->udp) && (!s->ipv6)) {
+ buf += sizeof(struct iphdr) /* fix for ipv4 raw */;
+ }
+
+ /* we do not do a strict check for "data" packets as per
+ * the RFC spec because the pure IP spec does not have
+ * that anyway.
+ */
+
+ if (s->cookie) {
+ if (s->cookie_is_64) {
+ cookie = ldq_be_p(buf + s->cookie_offset);
+ } else {
+ cookie = ldl_be_p(buf + s->cookie_offset);
+ }
+ if (cookie != s->rx_cookie) {
+ if (!s->header_mismatch) {
+ error_report("unknown cookie id");
+ }
+ return -1;
+ }
+ }
+ session = (uint32_t *) (buf + s->session_offset);
+ if (ldl_be_p(session) != s->rx_session) {
+ if (!s->header_mismatch) {
+ error_report("session mismatch");
+ }
+ return -1;
+ }
+ return 0;
+}
+
+static void net_l2tpv3_process_queue(NetL2TPV3State *s)
+{
+ int size = 0;
+ struct iovec *vec;
+ bool bad_read;
+ int data_size;
+ struct mmsghdr *msgvec;
+
+ /* go into ring mode only if there is a "pending" tail */
+ if (s->queue_depth > 0) {
+ do {
+ msgvec = s->msgvec + s->queue_tail;
+ if (msgvec->msg_len > 0) {
+ data_size = msgvec->msg_len - s->header_size;
+ vec = msgvec->msg_hdr.msg_iov;
+ if ((data_size > 0) &&
+ (l2tpv3_verify_header(s, vec->iov_base) == 0)) {
+ vec++;
+ /* Use the legacy delivery for now, we will
+ * switch to using our own ring as a queueing mechanism
+ * at a later date
+ */
+ size = qemu_send_packet_async(
+ &s->nc,
+ vec->iov_base,
+ data_size,
+ l2tpv3_send_completed
+ );
+ if (size == 0) {
+ l2tpv3_read_poll(s, false);
+ }
+ bad_read = false;
+ } else {
+ bad_read = true;
+ if (!s->header_mismatch) {
+ /* report error only once */
+ error_report("l2tpv3 header verification failed");
+ s->header_mismatch = true;
+ }
+ }
+ } else {
+ bad_read = true;
+ }
+ s->queue_tail = (s->queue_tail + 1) % MAX_L2TPV3_MSGCNT;
+ s->queue_depth--;
+ } while (
+ (s->queue_depth > 0) &&
+ qemu_can_send_packet(&s->nc) &&
+ ((size > 0) || bad_read)
+ );
+ }
+}
+
+static void net_l2tpv3_send(void *opaque)
+{
+ NetL2TPV3State *s = opaque;
+ int target_count, count;
+ struct mmsghdr *msgvec;
+
+ /* go into ring mode only if there is a "pending" tail */
+
+ if (s->queue_depth) {
+
+ /* The ring buffer we use has variable intake
+ * count of how much we can read varies - adjust accordingly
+ */
+
+ target_count = MAX_L2TPV3_MSGCNT - s->queue_depth;
+
+ /* Ensure we do not overrun the ring when we have
+ * a lot of enqueued packets
+ */
+
+ if (s->queue_head + target_count > MAX_L2TPV3_MSGCNT) {
+ target_count = MAX_L2TPV3_MSGCNT - s->queue_head;
+ }
+ } else {
+
+ /* we do not have any pending packets - we can use
+ * the whole message vector linearly instead of using
+ * it as a ring
+ */
+
+ s->queue_head = 0;
+ s->queue_tail = 0;
+ target_count = MAX_L2TPV3_MSGCNT;
+ }
+
+ msgvec = s->msgvec + s->queue_head;
+ if (target_count > 0) {
+ do {
+ count = recvmmsg(
+ s->fd,
+ msgvec,
+ target_count, MSG_DONTWAIT, NULL);
+ } while ((count == -1) && (errno == EINTR));
+ if (count < 0) {
+ /* Recv error - we still need to flush packets here,
+ * (re)set queue head to current position
+ */
+ count = 0;
+ }
+ s->queue_head = (s->queue_head + count) % MAX_L2TPV3_MSGCNT;
+ s->queue_depth += count;
+ }
+ net_l2tpv3_process_queue(s);
+}
+
+static void destroy_vector(struct mmsghdr *msgvec, int count, int iovcount)
+{
+ int i, j;
+ struct iovec *iov;
+ struct mmsghdr *cleanup = msgvec;
+ if (cleanup) {
+ for (i = 0; i < count; i++) {
+ if (cleanup->msg_hdr.msg_iov) {
+ iov = cleanup->msg_hdr.msg_iov;
+ for (j = 0; j < iovcount; j++) {
+ g_free(iov->iov_base);
+ iov++;
+ }
+ g_free(cleanup->msg_hdr.msg_iov);
+ }
+ cleanup++;
+ }
+ g_free(msgvec);
+ }
+}
+
+static struct mmsghdr *build_l2tpv3_vector(NetL2TPV3State *s, int count)
+{
+ int i;
+ struct iovec *iov;
+ struct mmsghdr *msgvec, *result;
+
+ msgvec = g_new(struct mmsghdr, count);
+ result = msgvec;
+ for (i = 0; i < count ; i++) {
+ msgvec->msg_hdr.msg_name = NULL;
+ msgvec->msg_hdr.msg_namelen = 0;
+ iov = g_new(struct iovec, IOVSIZE);
+ msgvec->msg_hdr.msg_iov = iov;
+ iov->iov_base = g_malloc(s->header_size);
+ iov->iov_len = s->header_size;
+ iov++ ;
+ iov->iov_base = qemu_memalign(BUFFER_ALIGN, BUFFER_SIZE);
+ iov->iov_len = BUFFER_SIZE;
+ msgvec->msg_hdr.msg_iovlen = 2;
+ msgvec->msg_hdr.msg_control = NULL;
+ msgvec->msg_hdr.msg_controllen = 0;
+ msgvec->msg_hdr.msg_flags = 0;
+ msgvec++;
+ }
+ return result;
+}
+
+static void net_l2tpv3_cleanup(NetClientState *nc)
+{
+ NetL2TPV3State *s = DO_UPCAST(NetL2TPV3State, nc, nc);
+ qemu_purge_queued_packets(nc);
+ l2tpv3_read_poll(s, false);
+ l2tpv3_write_poll(s, false);
+ if (s->fd >= 0) {
+ close(s->fd);
+ }
+ destroy_vector(s->msgvec, MAX_L2TPV3_MSGCNT, IOVSIZE);
+ g_free(s->vec);
+ g_free(s->header_buf);
+ g_free(s->dgram_dst);
+}
+
+static NetClientInfo net_l2tpv3_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_L2TPV3,
+ .size = sizeof(NetL2TPV3State),
+ .receive = net_l2tpv3_receive_dgram,
+ .receive_iov = net_l2tpv3_receive_dgram_iov,
+ .poll = l2tpv3_poll,
+ .cleanup = net_l2tpv3_cleanup,
+};
+
+int net_init_l2tpv3(const NetClientOptions *opts,
+ const char *name,
+ NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ const NetdevL2TPv3Options *l2tpv3;
+ NetL2TPV3State *s;
+ NetClientState *nc;
+ int fd = -1, gairet;
+ struct addrinfo hints;
+ struct addrinfo *result = NULL;
+ char *srcport, *dstport;
+
+ nc = qemu_new_net_client(&net_l2tpv3_info, peer, "l2tpv3", name);
+
+ s = DO_UPCAST(NetL2TPV3State, nc, nc);
+
+ s->queue_head = 0;
+ s->queue_tail = 0;
+ s->header_mismatch = false;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_L2TPV3);
+ l2tpv3 = opts->l2tpv3;
+
+ if (l2tpv3->has_ipv6 && l2tpv3->ipv6) {
+ s->ipv6 = l2tpv3->ipv6;
+ } else {
+ s->ipv6 = false;
+ }
+
+ if ((l2tpv3->has_offset) && (l2tpv3->offset > 256)) {
+ error_report("l2tpv3_open : offset must be less than 256 bytes");
+ goto outerr;
+ }
+
+ if (l2tpv3->has_rxcookie || l2tpv3->has_txcookie) {
+ if (l2tpv3->has_rxcookie && l2tpv3->has_txcookie) {
+ s->cookie = true;
+ } else {
+ goto outerr;
+ }
+ } else {
+ s->cookie = false;
+ }
+
+ if (l2tpv3->has_cookie64 || l2tpv3->cookie64) {
+ s->cookie_is_64 = true;
+ } else {
+ s->cookie_is_64 = false;
+ }
+
+ if (l2tpv3->has_udp && l2tpv3->udp) {
+ s->udp = true;
+ if (!(l2tpv3->has_srcport && l2tpv3->has_dstport)) {
+ error_report("l2tpv3_open : need both src and dst port for udp");
+ goto outerr;
+ } else {
+ srcport = l2tpv3->srcport;
+ dstport = l2tpv3->dstport;
+ }
+ } else {
+ s->udp = false;
+ srcport = NULL;
+ dstport = NULL;
+ }
+
+
+ s->offset = 4;
+ s->session_offset = 0;
+ s->cookie_offset = 4;
+ s->counter_offset = 4;
+
+ s->tx_session = l2tpv3->txsession;
+ if (l2tpv3->has_rxsession) {
+ s->rx_session = l2tpv3->rxsession;
+ } else {
+ s->rx_session = s->tx_session;
+ }
+
+ if (s->cookie) {
+ s->rx_cookie = l2tpv3->rxcookie;
+ s->tx_cookie = l2tpv3->txcookie;
+ if (s->cookie_is_64 == true) {
+ /* 64 bit cookie */
+ s->offset += 8;
+ s->counter_offset += 8;
+ } else {
+ /* 32 bit cookie */
+ s->offset += 4;
+ s->counter_offset += 4;
+ }
+ }
+
+ memset(&hints, 0, sizeof(hints));
+
+ if (s->ipv6) {
+ hints.ai_family = AF_INET6;
+ } else {
+ hints.ai_family = AF_INET;
+ }
+ if (s->udp) {
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = 0;
+ s->offset += 4;
+ s->counter_offset += 4;
+ s->session_offset += 4;
+ s->cookie_offset += 4;
+ } else {
+ hints.ai_socktype = SOCK_RAW;
+ hints.ai_protocol = IPPROTO_L2TP;
+ }
+
+ gairet = getaddrinfo(l2tpv3->src, srcport, &hints, &result);
+
+ if ((gairet != 0) || (result == NULL)) {
+ error_report(
+ "l2tpv3_open : could not resolve src, errno = %s",
+ gai_strerror(gairet)
+ );
+ goto outerr;
+ }
+ fd = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
+ if (fd == -1) {
+ fd = -errno;
+ error_report("l2tpv3_open : socket creation failed, errno = %d", -fd);
+ goto outerr;
+ }
+ if (bind(fd, (struct sockaddr *) result->ai_addr, result->ai_addrlen)) {
+ error_report("l2tpv3_open : could not bind socket err=%i", errno);
+ goto outerr;
+ }
+ if (result) {
+ freeaddrinfo(result);
+ }
+
+ memset(&hints, 0, sizeof(hints));
+
+ if (s->ipv6) {
+ hints.ai_family = AF_INET6;
+ } else {
+ hints.ai_family = AF_INET;
+ }
+ if (s->udp) {
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = 0;
+ } else {
+ hints.ai_socktype = SOCK_RAW;
+ hints.ai_protocol = IPPROTO_L2TP;
+ }
+
+ result = NULL;
+ gairet = getaddrinfo(l2tpv3->dst, dstport, &hints, &result);
+ if ((gairet != 0) || (result == NULL)) {
+ error_report(
+ "l2tpv3_open : could not resolve dst, error = %s",
+ gai_strerror(gairet)
+ );
+ goto outerr;
+ }
+
+ s->dgram_dst = g_new0(struct sockaddr_storage, 1);
+ memcpy(s->dgram_dst, result->ai_addr, result->ai_addrlen);
+ s->dst_size = result->ai_addrlen;
+
+ if (result) {
+ freeaddrinfo(result);
+ }
+
+ if (l2tpv3->has_counter && l2tpv3->counter) {
+ s->has_counter = true;
+ s->offset += 4;
+ } else {
+ s->has_counter = false;
+ }
+
+ if (l2tpv3->has_pincounter && l2tpv3->pincounter) {
+ s->has_counter = true; /* pin counter implies that there is counter */
+ s->pin_counter = true;
+ } else {
+ s->pin_counter = false;
+ }
+
+ if (l2tpv3->has_offset) {
+ /* extra offset */
+ s->offset += l2tpv3->offset;
+ }
+
+ if ((s->ipv6) || (s->udp)) {
+ s->header_size = s->offset;
+ } else {
+ s->header_size = s->offset + sizeof(struct iphdr);
+ }
+
+ s->msgvec = build_l2tpv3_vector(s, MAX_L2TPV3_MSGCNT);
+ s->vec = g_new(struct iovec, MAX_L2TPV3_IOVCNT);
+ s->header_buf = g_malloc(s->header_size);
+
+ qemu_set_nonblock(fd);
+
+ s->fd = fd;
+ s->counter = 0;
+
+ l2tpv3_read_poll(s, true);
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "l2tpv3: connected");
+ return 0;
+outerr:
+ qemu_del_net_client(nc);
+ if (fd >= 0) {
+ close(fd);
+ }
+ if (result) {
+ freeaddrinfo(result);
+ }
+ return -1;
+}
+
diff --git a/qemu/net/net.c b/qemu/net/net.c
new file mode 100644
index 000000000..28a5597b8
--- /dev/null
+++ b/qemu/net/net.c
@@ -0,0 +1,1459 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "config-host.h"
+
+#include "net/net.h"
+#include "clients.h"
+#include "hub.h"
+#include "net/slirp.h"
+#include "net/eth.h"
+#include "util.h"
+
+#include "monitor/monitor.h"
+#include "qemu-common.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
+#include "qemu/sockets.h"
+#include "qemu/config-file.h"
+#include "qmp-commands.h"
+#include "hw/qdev.h"
+#include "qemu/iov.h"
+#include "qemu/main-loop.h"
+#include "qapi-visit.h"
+#include "qapi/opts-visitor.h"
+#include "qapi/dealloc-visitor.h"
+#include "sysemu/sysemu.h"
+
+/* Net bridge is currently not supported for W32. */
+#if !defined(_WIN32)
+# define CONFIG_NET_BRIDGE
+#endif
+
+static VMChangeStateEntry *net_change_state_entry;
+static QTAILQ_HEAD(, NetClientState) net_clients;
+
+const char *host_net_devices[] = {
+ "tap",
+ "socket",
+ "dump",
+#ifdef CONFIG_NET_BRIDGE
+ "bridge",
+#endif
+#ifdef CONFIG_NETMAP
+ "netmap",
+#endif
+#ifdef CONFIG_SLIRP
+ "user",
+#endif
+#ifdef CONFIG_VDE
+ "vde",
+#endif
+ "vhost-user",
+ NULL,
+};
+
+int default_net = 1;
+
+/***********************************************************/
+/* network device redirectors */
+
+#if defined(DEBUG_NET)
+static void hex_dump(FILE *f, const uint8_t *buf, int size)
+{
+ int len, i, j, c;
+
+ for(i=0;i<size;i+=16) {
+ len = size - i;
+ if (len > 16)
+ len = 16;
+ fprintf(f, "%08x ", i);
+ for(j=0;j<16;j++) {
+ if (j < len)
+ fprintf(f, " %02x", buf[i+j]);
+ else
+ fprintf(f, " ");
+ }
+ fprintf(f, " ");
+ for(j=0;j<len;j++) {
+ c = buf[i+j];
+ if (c < ' ' || c > '~')
+ c = '.';
+ fprintf(f, "%c", c);
+ }
+ fprintf(f, "\n");
+ }
+}
+#endif
+
+static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
+{
+ const char *p, *p1;
+ int len;
+ p = *pp;
+ p1 = strchr(p, sep);
+ if (!p1)
+ return -1;
+ len = p1 - p;
+ p1++;
+ if (buf_size > 0) {
+ if (len > buf_size - 1)
+ len = buf_size - 1;
+ memcpy(buf, p, len);
+ buf[len] = '\0';
+ }
+ *pp = p1;
+ return 0;
+}
+
+int parse_host_port(struct sockaddr_in *saddr, const char *str)
+{
+ char buf[512];
+ struct hostent *he;
+ const char *p, *r;
+ int port;
+
+ p = str;
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
+ return -1;
+ saddr->sin_family = AF_INET;
+ if (buf[0] == '\0') {
+ saddr->sin_addr.s_addr = 0;
+ } else {
+ if (qemu_isdigit(buf[0])) {
+ if (!inet_aton(buf, &saddr->sin_addr))
+ return -1;
+ } else {
+ if ((he = gethostbyname(buf)) == NULL)
+ return - 1;
+ saddr->sin_addr = *(struct in_addr *)he->h_addr;
+ }
+ }
+ port = strtol(p, (char **)&r, 0);
+ if (r == p)
+ return -1;
+ saddr->sin_port = htons(port);
+ return 0;
+}
+
+char *qemu_mac_strdup_printf(const uint8_t *macaddr)
+{
+ return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
+ macaddr[0], macaddr[1], macaddr[2],
+ macaddr[3], macaddr[4], macaddr[5]);
+}
+
+void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
+{
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
+ nc->model,
+ macaddr[0], macaddr[1], macaddr[2],
+ macaddr[3], macaddr[4], macaddr[5]);
+}
+
+static int mac_table[256] = {0};
+
+static void qemu_macaddr_set_used(MACAddr *macaddr)
+{
+ int index;
+
+ for (index = 0x56; index < 0xFF; index++) {
+ if (macaddr->a[5] == index) {
+ mac_table[index]++;
+ }
+ }
+}
+
+static void qemu_macaddr_set_free(MACAddr *macaddr)
+{
+ int index;
+ static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
+
+ if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
+ return;
+ }
+ for (index = 0x56; index < 0xFF; index++) {
+ if (macaddr->a[5] == index) {
+ mac_table[index]--;
+ }
+ }
+}
+
+static int qemu_macaddr_get_free(void)
+{
+ int index;
+
+ for (index = 0x56; index < 0xFF; index++) {
+ if (mac_table[index] == 0) {
+ return index;
+ }
+ }
+
+ return -1;
+}
+
+void qemu_macaddr_default_if_unset(MACAddr *macaddr)
+{
+ static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
+ static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
+
+ if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
+ if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
+ return;
+ } else {
+ qemu_macaddr_set_used(macaddr);
+ return;
+ }
+ }
+
+ macaddr->a[0] = 0x52;
+ macaddr->a[1] = 0x54;
+ macaddr->a[2] = 0x00;
+ macaddr->a[3] = 0x12;
+ macaddr->a[4] = 0x34;
+ macaddr->a[5] = qemu_macaddr_get_free();
+ qemu_macaddr_set_used(macaddr);
+}
+
+/**
+ * Generate a name for net client
+ *
+ * Only net clients created with the legacy -net option and NICs need this.
+ */
+static char *assign_name(NetClientState *nc1, const char *model)
+{
+ NetClientState *nc;
+ int id = 0;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ if (nc == nc1) {
+ continue;
+ }
+ if (strcmp(nc->model, model) == 0) {
+ id++;
+ }
+ }
+
+ return g_strdup_printf("%s.%d", model, id);
+}
+
+static void qemu_net_client_destructor(NetClientState *nc)
+{
+ g_free(nc);
+}
+
+static void qemu_net_client_setup(NetClientState *nc,
+ NetClientInfo *info,
+ NetClientState *peer,
+ const char *model,
+ const char *name,
+ NetClientDestructor *destructor)
+{
+ nc->info = info;
+ nc->model = g_strdup(model);
+ if (name) {
+ nc->name = g_strdup(name);
+ } else {
+ nc->name = assign_name(nc, model);
+ }
+
+ if (peer) {
+ assert(!peer->peer);
+ nc->peer = peer;
+ peer->peer = nc;
+ }
+ QTAILQ_INSERT_TAIL(&net_clients, nc, next);
+
+ nc->incoming_queue = qemu_new_net_queue(nc);
+ nc->destructor = destructor;
+}
+
+NetClientState *qemu_new_net_client(NetClientInfo *info,
+ NetClientState *peer,
+ const char *model,
+ const char *name)
+{
+ NetClientState *nc;
+
+ assert(info->size >= sizeof(NetClientState));
+
+ nc = g_malloc0(info->size);
+ qemu_net_client_setup(nc, info, peer, model, name,
+ qemu_net_client_destructor);
+
+ return nc;
+}
+
+NICState *qemu_new_nic(NetClientInfo *info,
+ NICConf *conf,
+ const char *model,
+ const char *name,
+ void *opaque)
+{
+ NetClientState **peers = conf->peers.ncs;
+ NICState *nic;
+ int i, queues = MAX(1, conf->peers.queues);
+
+ assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
+ assert(info->size >= sizeof(NICState));
+
+ nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
+ nic->ncs = (void *)nic + info->size;
+ nic->conf = conf;
+ nic->opaque = opaque;
+
+ for (i = 0; i < queues; i++) {
+ qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
+ NULL);
+ nic->ncs[i].queue_index = i;
+ }
+
+ return nic;
+}
+
+NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
+{
+ return nic->ncs + queue_index;
+}
+
+NetClientState *qemu_get_queue(NICState *nic)
+{
+ return qemu_get_subqueue(nic, 0);
+}
+
+NICState *qemu_get_nic(NetClientState *nc)
+{
+ NetClientState *nc0 = nc - nc->queue_index;
+
+ return (NICState *)((void *)nc0 - nc->info->size);
+}
+
+void *qemu_get_nic_opaque(NetClientState *nc)
+{
+ NICState *nic = qemu_get_nic(nc);
+
+ return nic->opaque;
+}
+
+static void qemu_cleanup_net_client(NetClientState *nc)
+{
+ QTAILQ_REMOVE(&net_clients, nc, next);
+
+ if (nc->info->cleanup) {
+ nc->info->cleanup(nc);
+ }
+}
+
+static void qemu_free_net_client(NetClientState *nc)
+{
+ if (nc->incoming_queue) {
+ qemu_del_net_queue(nc->incoming_queue);
+ }
+ if (nc->peer) {
+ nc->peer->peer = NULL;
+ }
+ g_free(nc->name);
+ g_free(nc->model);
+ if (nc->destructor) {
+ nc->destructor(nc);
+ }
+}
+
+void qemu_del_net_client(NetClientState *nc)
+{
+ NetClientState *ncs[MAX_QUEUE_NUM];
+ int queues, i;
+
+ assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
+
+ /* If the NetClientState belongs to a multiqueue backend, we will change all
+ * other NetClientStates also.
+ */
+ queues = qemu_find_net_clients_except(nc->name, ncs,
+ NET_CLIENT_OPTIONS_KIND_NIC,
+ MAX_QUEUE_NUM);
+ assert(queues != 0);
+
+ /* If there is a peer NIC, delete and cleanup client, but do not free. */
+ if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ NICState *nic = qemu_get_nic(nc->peer);
+ if (nic->peer_deleted) {
+ return;
+ }
+ nic->peer_deleted = true;
+
+ for (i = 0; i < queues; i++) {
+ ncs[i]->peer->link_down = true;
+ }
+
+ if (nc->peer->info->link_status_changed) {
+ nc->peer->info->link_status_changed(nc->peer);
+ }
+
+ for (i = 0; i < queues; i++) {
+ qemu_cleanup_net_client(ncs[i]);
+ }
+
+ return;
+ }
+
+ for (i = 0; i < queues; i++) {
+ qemu_cleanup_net_client(ncs[i]);
+ qemu_free_net_client(ncs[i]);
+ }
+}
+
+void qemu_del_nic(NICState *nic)
+{
+ int i, queues = MAX(nic->conf->peers.queues, 1);
+
+ qemu_macaddr_set_free(&nic->conf->macaddr);
+
+ /* If this is a peer NIC and peer has already been deleted, free it now. */
+ if (nic->peer_deleted) {
+ for (i = 0; i < queues; i++) {
+ qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
+ }
+ }
+
+ for (i = queues - 1; i >= 0; i--) {
+ NetClientState *nc = qemu_get_subqueue(nic, i);
+
+ qemu_cleanup_net_client(nc);
+ qemu_free_net_client(nc);
+ }
+
+ g_free(nic);
+}
+
+void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
+{
+ NetClientState *nc;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->queue_index == 0) {
+ func(qemu_get_nic(nc), opaque);
+ }
+ }
+ }
+}
+
+bool qemu_has_ufo(NetClientState *nc)
+{
+ if (!nc || !nc->info->has_ufo) {
+ return false;
+ }
+
+ return nc->info->has_ufo(nc);
+}
+
+bool qemu_has_vnet_hdr(NetClientState *nc)
+{
+ if (!nc || !nc->info->has_vnet_hdr) {
+ return false;
+ }
+
+ return nc->info->has_vnet_hdr(nc);
+}
+
+bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
+{
+ if (!nc || !nc->info->has_vnet_hdr_len) {
+ return false;
+ }
+
+ return nc->info->has_vnet_hdr_len(nc, len);
+}
+
+void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
+{
+ if (!nc || !nc->info->using_vnet_hdr) {
+ return;
+ }
+
+ nc->info->using_vnet_hdr(nc, enable);
+}
+
+void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
+ int ecn, int ufo)
+{
+ if (!nc || !nc->info->set_offload) {
+ return;
+ }
+
+ nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
+}
+
+void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
+{
+ if (!nc || !nc->info->set_vnet_hdr_len) {
+ return;
+ }
+
+ nc->info->set_vnet_hdr_len(nc, len);
+}
+
+int qemu_set_vnet_le(NetClientState *nc, bool is_le)
+{
+ if (!nc || !nc->info->set_vnet_le) {
+ return -ENOSYS;
+ }
+
+ return nc->info->set_vnet_le(nc, is_le);
+}
+
+int qemu_set_vnet_be(NetClientState *nc, bool is_be)
+{
+ if (!nc || !nc->info->set_vnet_be) {
+ return -ENOSYS;
+ }
+
+ return nc->info->set_vnet_be(nc, is_be);
+}
+
+int qemu_can_send_packet(NetClientState *sender)
+{
+ int vm_running = runstate_is_running();
+
+ if (!vm_running) {
+ return 0;
+ }
+
+ if (!sender->peer) {
+ return 1;
+ }
+
+ if (sender->peer->receive_disabled) {
+ return 0;
+ } else if (sender->peer->info->can_receive &&
+ !sender->peer->info->can_receive(sender->peer)) {
+ return 0;
+ }
+ return 1;
+}
+
+ssize_t qemu_deliver_packet(NetClientState *sender,
+ unsigned flags,
+ const uint8_t *data,
+ size_t size,
+ void *opaque)
+{
+ NetClientState *nc = opaque;
+ ssize_t ret;
+
+ if (nc->link_down) {
+ return size;
+ }
+
+ if (nc->receive_disabled) {
+ return 0;
+ }
+
+ if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
+ ret = nc->info->receive_raw(nc, data, size);
+ } else {
+ ret = nc->info->receive(nc, data, size);
+ }
+
+ if (ret == 0) {
+ nc->receive_disabled = 1;
+ }
+
+ return ret;
+}
+
+void qemu_purge_queued_packets(NetClientState *nc)
+{
+ if (!nc->peer) {
+ return;
+ }
+
+ qemu_net_queue_purge(nc->peer->incoming_queue, nc);
+}
+
+static
+void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
+{
+ nc->receive_disabled = 0;
+
+ if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ if (net_hub_flush(nc->peer)) {
+ qemu_notify_event();
+ }
+ }
+ if (qemu_net_queue_flush(nc->incoming_queue)) {
+ /* We emptied the queue successfully, signal to the IO thread to repoll
+ * the file descriptor (for tap, for example).
+ */
+ qemu_notify_event();
+ } else if (purge) {
+ /* Unable to empty the queue, purge remaining packets */
+ qemu_net_queue_purge(nc->incoming_queue, nc);
+ }
+}
+
+void qemu_flush_queued_packets(NetClientState *nc)
+{
+ qemu_flush_or_purge_queued_packets(nc, false);
+}
+
+static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
+ unsigned flags,
+ const uint8_t *buf, int size,
+ NetPacketSent *sent_cb)
+{
+ NetQueue *queue;
+
+#ifdef DEBUG_NET
+ printf("qemu_send_packet_async:\n");
+ hex_dump(stdout, buf, size);
+#endif
+
+ if (sender->link_down || !sender->peer) {
+ return size;
+ }
+
+ queue = sender->peer->incoming_queue;
+
+ return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
+}
+
+ssize_t qemu_send_packet_async(NetClientState *sender,
+ const uint8_t *buf, int size,
+ NetPacketSent *sent_cb)
+{
+ return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
+ buf, size, sent_cb);
+}
+
+void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
+{
+ qemu_send_packet_async(nc, buf, size, NULL);
+}
+
+ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
+{
+ return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
+ buf, size, NULL);
+}
+
+static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
+ int iovcnt)
+{
+ uint8_t buffer[NET_BUFSIZE];
+ size_t offset;
+
+ offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
+
+ return nc->info->receive(nc, buffer, offset);
+}
+
+ssize_t qemu_deliver_packet_iov(NetClientState *sender,
+ unsigned flags,
+ const struct iovec *iov,
+ int iovcnt,
+ void *opaque)
+{
+ NetClientState *nc = opaque;
+ int ret;
+
+ if (nc->link_down) {
+ return iov_size(iov, iovcnt);
+ }
+
+ if (nc->receive_disabled) {
+ return 0;
+ }
+
+ if (nc->info->receive_iov) {
+ ret = nc->info->receive_iov(nc, iov, iovcnt);
+ } else {
+ ret = nc_sendv_compat(nc, iov, iovcnt);
+ }
+
+ if (ret == 0) {
+ nc->receive_disabled = 1;
+ }
+
+ return ret;
+}
+
+ssize_t qemu_sendv_packet_async(NetClientState *sender,
+ const struct iovec *iov, int iovcnt,
+ NetPacketSent *sent_cb)
+{
+ NetQueue *queue;
+
+ if (sender->link_down || !sender->peer) {
+ return iov_size(iov, iovcnt);
+ }
+
+ queue = sender->peer->incoming_queue;
+
+ return qemu_net_queue_send_iov(queue, sender,
+ QEMU_NET_PACKET_FLAG_NONE,
+ iov, iovcnt, sent_cb);
+}
+
+ssize_t
+qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
+{
+ return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
+}
+
+NetClientState *qemu_find_netdev(const char *id)
+{
+ NetClientState *nc;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
+ continue;
+ if (!strcmp(nc->name, id)) {
+ return nc;
+ }
+ }
+
+ return NULL;
+}
+
+int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
+ NetClientOptionsKind type, int max)
+{
+ NetClientState *nc;
+ int ret = 0;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ if (nc->info->type == type) {
+ continue;
+ }
+ if (!id || !strcmp(nc->name, id)) {
+ if (ret < max) {
+ ncs[ret] = nc;
+ }
+ ret++;
+ }
+ }
+
+ return ret;
+}
+
+static int nic_get_free_idx(void)
+{
+ int index;
+
+ for (index = 0; index < MAX_NICS; index++)
+ if (!nd_table[index].used)
+ return index;
+ return -1;
+}
+
+int qemu_show_nic_models(const char *arg, const char *const *models)
+{
+ int i;
+
+ if (!arg || !is_help_option(arg)) {
+ return 0;
+ }
+
+ fprintf(stderr, "qemu: Supported NIC models: ");
+ for (i = 0 ; models[i]; i++)
+ fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
+ return 1;
+}
+
+void qemu_check_nic_model(NICInfo *nd, const char *model)
+{
+ const char *models[2];
+
+ models[0] = model;
+ models[1] = NULL;
+
+ if (qemu_show_nic_models(nd->model, models))
+ exit(0);
+ if (qemu_find_nic_model(nd, models, model) < 0)
+ exit(1);
+}
+
+int qemu_find_nic_model(NICInfo *nd, const char * const *models,
+ const char *default_model)
+{
+ int i;
+
+ if (!nd->model)
+ nd->model = g_strdup(default_model);
+
+ for (i = 0 ; models[i]; i++) {
+ if (strcmp(nd->model, models[i]) == 0)
+ return i;
+ }
+
+ error_report("Unsupported NIC model: %s", nd->model);
+ return -1;
+}
+
+static int net_init_nic(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ int idx;
+ NICInfo *nd;
+ const NetLegacyNicOptions *nic;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
+ nic = opts->nic;
+
+ idx = nic_get_free_idx();
+ if (idx == -1 || nb_nics >= MAX_NICS) {
+ error_setg(errp, "too many NICs");
+ return -1;
+ }
+
+ nd = &nd_table[idx];
+
+ memset(nd, 0, sizeof(*nd));
+
+ if (nic->has_netdev) {
+ nd->netdev = qemu_find_netdev(nic->netdev);
+ if (!nd->netdev) {
+ error_setg(errp, "netdev '%s' not found", nic->netdev);
+ return -1;
+ }
+ } else {
+ assert(peer);
+ nd->netdev = peer;
+ }
+ nd->name = g_strdup(name);
+ if (nic->has_model) {
+ nd->model = g_strdup(nic->model);
+ }
+ if (nic->has_addr) {
+ nd->devaddr = g_strdup(nic->addr);
+ }
+
+ if (nic->has_macaddr &&
+ net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
+ error_setg(errp, "invalid syntax for ethernet address");
+ return -1;
+ }
+ if (nic->has_macaddr &&
+ is_multicast_ether_addr(nd->macaddr.a)) {
+ error_setg(errp,
+ "NIC cannot have multicast MAC address (odd 1st byte)");
+ return -1;
+ }
+ qemu_macaddr_default_if_unset(&nd->macaddr);
+
+ if (nic->has_vectors) {
+ if (nic->vectors > 0x7ffffff) {
+ error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
+ return -1;
+ }
+ nd->nvectors = nic->vectors;
+ } else {
+ nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
+ }
+
+ nd->used = 1;
+ nb_nics++;
+
+ return idx;
+}
+
+
+static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
+ const NetClientOptions *opts,
+ const char *name,
+ NetClientState *peer, Error **errp) = {
+ [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
+#ifdef CONFIG_SLIRP
+ [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
+#endif
+ [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
+ [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
+#ifdef CONFIG_VDE
+ [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
+#endif
+#ifdef CONFIG_NETMAP
+ [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
+#endif
+ [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
+#ifdef CONFIG_NET_BRIDGE
+ [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
+#endif
+ [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
+#ifdef CONFIG_VHOST_NET_USED
+ [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
+#endif
+#ifdef CONFIG_L2TPV3
+ [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
+#endif
+};
+
+
+static int net_client_init1(const void *object, int is_netdev, Error **errp)
+{
+ const NetClientOptions *opts;
+ const char *name;
+ NetClientState *peer = NULL;
+
+ if (is_netdev) {
+ const Netdev *netdev = object;
+ opts = netdev->opts;
+ name = netdev->id;
+
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP ||
+ opts->kind == NET_CLIENT_OPTIONS_KIND_NIC ||
+ !net_client_init_fun[opts->kind]) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a netdev backend type");
+ return -1;
+ }
+ } else {
+ const NetLegacy *net = object;
+ opts = net->opts;
+ /* missing optional values have been initialized to "all bits zero" */
+ name = net->has_id ? net->id : net->name;
+
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_NONE) {
+ return 0; /* nothing to do */
+ }
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a net type");
+ return -1;
+ }
+
+ if (!net_client_init_fun[opts->kind]) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a net backend type (maybe it is not compiled "
+ "into this binary)");
+ return -1;
+ }
+
+ /* Do not add to a vlan if it's a nic with a netdev= parameter. */
+ if (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
+ !opts->nic->has_netdev) {
+ peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL);
+ }
+ }
+
+ if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) {
+ /* FIXME drop when all init functions store an Error */
+ if (errp && !*errp) {
+ error_setg(errp, QERR_DEVICE_INIT_FAILED,
+ NetClientOptionsKind_lookup[opts->kind]);
+ }
+ return -1;
+ }
+ return 0;
+}
+
+
+static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
+{
+ if (is_netdev) {
+ visit_type_Netdev(v, (Netdev **)object, NULL, errp);
+ } else {
+ visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
+ }
+}
+
+
+int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
+{
+ void *object = NULL;
+ Error *err = NULL;
+ int ret = -1;
+
+ {
+ OptsVisitor *ov = opts_visitor_new(opts);
+
+ net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
+ opts_visitor_cleanup(ov);
+ }
+
+ if (!err) {
+ ret = net_client_init1(object, is_netdev, &err);
+ }
+
+ if (object) {
+ QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
+
+ net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
+ qapi_dealloc_visitor_cleanup(dv);
+ }
+
+ error_propagate(errp, err);
+ return ret;
+}
+
+
+static int net_host_check_device(const char *device)
+{
+ int i;
+ for (i = 0; host_net_devices[i]; i++) {
+ if (!strncmp(host_net_devices[i], device,
+ strlen(host_net_devices[i]))) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+void hmp_host_net_add(Monitor *mon, const QDict *qdict)
+{
+ const char *device = qdict_get_str(qdict, "device");
+ const char *opts_str = qdict_get_try_str(qdict, "opts");
+ Error *local_err = NULL;
+ QemuOpts *opts;
+
+ if (!net_host_check_device(device)) {
+ monitor_printf(mon, "invalid host network device %s\n", device);
+ return;
+ }
+
+ opts = qemu_opts_parse_noisily(qemu_find_opts("net"),
+ opts_str ? opts_str : "", false);
+ if (!opts) {
+ return;
+ }
+
+ qemu_opt_set(opts, "type", device, &error_abort);
+
+ net_client_init(opts, 0, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ monitor_printf(mon, "adding host network device %s failed\n", device);
+ }
+}
+
+void hmp_host_net_remove(Monitor *mon, const QDict *qdict)
+{
+ NetClientState *nc;
+ int vlan_id = qdict_get_int(qdict, "vlan_id");
+ const char *device = qdict_get_str(qdict, "device");
+
+ nc = net_hub_find_client_by_name(vlan_id, device);
+ if (!nc) {
+ error_report("Host network device '%s' on hub '%d' not found",
+ device, vlan_id);
+ return;
+ }
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ error_report("invalid host network device '%s'", device);
+ return;
+ }
+
+ qemu_del_net_client(nc->peer);
+ qemu_del_net_client(nc);
+}
+
+void netdev_add(QemuOpts *opts, Error **errp)
+{
+ net_client_init(opts, 1, errp);
+}
+
+void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
+{
+ Error *local_err = NULL;
+ QemuOptsList *opts_list;
+ QemuOpts *opts;
+
+ opts_list = qemu_find_opts_err("netdev", &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ netdev_add(opts, &local_err);
+ if (local_err) {
+ qemu_opts_del(opts);
+ goto out;
+ }
+
+out:
+ error_propagate(errp, local_err);
+}
+
+void qmp_netdev_del(const char *id, Error **errp)
+{
+ NetClientState *nc;
+ QemuOpts *opts;
+
+ nc = qemu_find_netdev(id);
+ if (!nc) {
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+ "Device '%s' not found", id);
+ return;
+ }
+
+ opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
+ if (!opts) {
+ error_setg(errp, "Device '%s' is not a netdev", id);
+ return;
+ }
+
+ qemu_del_net_client(nc);
+ qemu_opts_del(opts);
+}
+
+void print_net_client(Monitor *mon, NetClientState *nc)
+{
+ monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
+ nc->queue_index,
+ NetClientOptionsKind_lookup[nc->info->type],
+ nc->info_str);
+}
+
+RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
+ Error **errp)
+{
+ NetClientState *nc;
+ RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ RxFilterInfoList *entry;
+ RxFilterInfo *info;
+
+ if (has_name && strcmp(nc->name, name) != 0) {
+ continue;
+ }
+
+ /* only query rx-filter information of NIC */
+ if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (has_name) {
+ error_setg(errp, "net client(%s) isn't a NIC", name);
+ return NULL;
+ }
+ continue;
+ }
+
+ if (nc->info->query_rx_filter) {
+ info = nc->info->query_rx_filter(nc);
+ entry = g_malloc0(sizeof(*entry));
+ entry->value = info;
+
+ if (!filter_list) {
+ filter_list = entry;
+ } else {
+ last_entry->next = entry;
+ }
+ last_entry = entry;
+ } else if (has_name) {
+ error_setg(errp, "net client(%s) doesn't support"
+ " rx-filter querying", name);
+ return NULL;
+ }
+
+ if (has_name) {
+ break;
+ }
+ }
+
+ if (filter_list == NULL && has_name) {
+ error_setg(errp, "invalid net client name: %s", name);
+ }
+
+ return filter_list;
+}
+
+void hmp_info_network(Monitor *mon, const QDict *qdict)
+{
+ NetClientState *nc, *peer;
+ NetClientOptionsKind type;
+
+ net_hub_info(mon);
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ peer = nc->peer;
+ type = nc->info->type;
+
+ /* Skip if already printed in hub info */
+ if (net_hub_id_for_client(nc, NULL) == 0) {
+ continue;
+ }
+
+ if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ print_net_client(mon, nc);
+ } /* else it's a netdev connected to a NIC, printed with the NIC */
+ if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ monitor_printf(mon, " \\ ");
+ print_net_client(mon, peer);
+ }
+ }
+}
+
+void qmp_set_link(const char *name, bool up, Error **errp)
+{
+ NetClientState *ncs[MAX_QUEUE_NUM];
+ NetClientState *nc;
+ int queues, i;
+
+ queues = qemu_find_net_clients_except(name, ncs,
+ NET_CLIENT_OPTIONS_KIND_MAX,
+ MAX_QUEUE_NUM);
+
+ if (queues == 0) {
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+ "Device '%s' not found", name);
+ return;
+ }
+ nc = ncs[0];
+
+ for (i = 0; i < queues; i++) {
+ ncs[i]->link_down = !up;
+ }
+
+ if (nc->info->link_status_changed) {
+ nc->info->link_status_changed(nc);
+ }
+
+ if (nc->peer) {
+ /* Change peer link only if the peer is NIC and then notify peer.
+ * If the peer is a HUBPORT or a backend, we do not change the
+ * link status.
+ *
+ * This behavior is compatible with qemu vlans where there could be
+ * multiple clients that can still communicate with each other in
+ * disconnected mode. For now maintain this compatibility.
+ */
+ if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ for (i = 0; i < queues; i++) {
+ ncs[i]->peer->link_down = !up;
+ }
+ }
+ if (nc->peer->info->link_status_changed) {
+ nc->peer->info->link_status_changed(nc->peer);
+ }
+ }
+}
+
+static void net_vm_change_state_handler(void *opaque, int running,
+ RunState state)
+{
+ NetClientState *nc;
+ NetClientState *tmp;
+
+ QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
+ if (running) {
+ /* Flush queued packets and wake up backends. */
+ if (nc->peer && qemu_can_send_packet(nc)) {
+ qemu_flush_queued_packets(nc->peer);
+ }
+ } else {
+ /* Complete all queued packets, to guarantee we don't modify
+ * state later when VM is not running.
+ */
+ qemu_flush_or_purge_queued_packets(nc, true);
+ }
+ }
+}
+
+void net_cleanup(void)
+{
+ NetClientState *nc;
+
+ /* We may del multiple entries during qemu_del_net_client(),
+ * so QTAILQ_FOREACH_SAFE() is also not safe here.
+ */
+ while (!QTAILQ_EMPTY(&net_clients)) {
+ nc = QTAILQ_FIRST(&net_clients);
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ qemu_del_nic(qemu_get_nic(nc));
+ } else {
+ qemu_del_net_client(nc);
+ }
+ }
+
+ qemu_del_vm_change_state_handler(net_change_state_entry);
+}
+
+void net_check_clients(void)
+{
+ NetClientState *nc;
+ int i;
+
+ /* Don't warn about the default network setup that you get if
+ * no command line -net or -netdev options are specified. There
+ * are two cases that we would otherwise complain about:
+ * (1) board doesn't support a NIC but the implicit "-net nic"
+ * requested one
+ * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
+ * sets up a nic that isn't connected to anything.
+ */
+ if (default_net) {
+ return;
+ }
+
+ net_hub_check_clients();
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ if (!nc->peer) {
+ fprintf(stderr, "Warning: %s %s has no peer\n",
+ nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
+ "nic" : "netdev", nc->name);
+ }
+ }
+
+ /* Check that all NICs requested via -net nic actually got created.
+ * NICs created via -device don't need to be checked here because
+ * they are always instantiated.
+ */
+ for (i = 0; i < MAX_NICS; i++) {
+ NICInfo *nd = &nd_table[i];
+ if (nd->used && !nd->instantiated) {
+ fprintf(stderr, "Warning: requested NIC (%s, model %s) "
+ "was not created (not supported by this machine?)\n",
+ nd->name ? nd->name : "anonymous",
+ nd->model ? nd->model : "unspecified");
+ }
+ }
+}
+
+static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
+{
+ Error *local_err = NULL;
+
+ net_client_init(opts, 0, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
+{
+ Error *local_err = NULL;
+ int ret;
+
+ ret = net_client_init(opts, 1, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ return ret;
+}
+
+int net_init_clients(void)
+{
+ QemuOptsList *net = qemu_find_opts("net");
+
+ if (default_net) {
+ /* if no clients, we use a default config */
+ qemu_opts_set(net, NULL, "type", "nic", &error_abort);
+#ifdef CONFIG_SLIRP
+ qemu_opts_set(net, NULL, "type", "user", &error_abort);
+#endif
+ }
+
+ net_change_state_entry =
+ qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
+
+ QTAILQ_INIT(&net_clients);
+
+ if (qemu_opts_foreach(qemu_find_opts("netdev"),
+ net_init_netdev, NULL, NULL)) {
+ return -1;
+ }
+
+ if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int net_client_parse(QemuOptsList *opts_list, const char *optarg)
+{
+#if defined(CONFIG_SLIRP)
+ int ret;
+ if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
+ return ret;
+ }
+#endif
+
+ if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
+ return -1;
+ }
+
+ default_net = 0;
+ return 0;
+}
+
+/* From FreeBSD */
+/* XXX: optimize */
+unsigned compute_mcast_idx(const uint8_t *ep)
+{
+ uint32_t crc;
+ int carry, i, j;
+ uint8_t b;
+
+ crc = 0xffffffff;
+ for (i = 0; i < 6; i++) {
+ b = *ep++;
+ for (j = 0; j < 8; j++) {
+ carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
+ crc <<= 1;
+ b >>= 1;
+ if (carry) {
+ crc = ((crc ^ POLYNOMIAL) | carry);
+ }
+ }
+ }
+ return crc >> 26;
+}
+
+QemuOptsList qemu_netdev_opts = {
+ .name = "netdev",
+ .implied_opt_name = "type",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
+ .desc = {
+ /*
+ * no elements => accept any params
+ * validation will happen later
+ */
+ { /* end of list */ }
+ },
+};
+
+QemuOptsList qemu_net_opts = {
+ .name = "net",
+ .implied_opt_name = "type",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
+ .desc = {
+ /*
+ * no elements => accept any params
+ * validation will happen later
+ */
+ { /* end of list */ }
+ },
+};
diff --git a/qemu/net/netmap.c b/qemu/net/netmap.c
new file mode 100644
index 000000000..508b82947
--- /dev/null
+++ b/qemu/net/netmap.c
@@ -0,0 +1,463 @@
+/*
+ * netmap access for qemu
+ *
+ * Copyright (c) 2012-2013 Luigi Rizzo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <sys/mman.h>
+#include <stdint.h>
+#include <stdio.h>
+#define NETMAP_WITH_LIBS
+#include <net/netmap.h>
+#include <net/netmap_user.h>
+
+#include "net/net.h"
+#include "net/tap.h"
+#include "clients.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+#include "qemu/iov.h"
+
+/* Private netmap device info. */
+typedef struct NetmapPriv {
+ int fd;
+ size_t memsize;
+ void *mem;
+ struct netmap_if *nifp;
+ struct netmap_ring *rx;
+ struct netmap_ring *tx;
+ char fdname[PATH_MAX]; /* Normally "/dev/netmap". */
+ char ifname[IFNAMSIZ];
+} NetmapPriv;
+
+typedef struct NetmapState {
+ NetClientState nc;
+ NetmapPriv me;
+ bool read_poll;
+ bool write_poll;
+ struct iovec iov[IOV_MAX];
+ int vnet_hdr_len; /* Current virtio-net header length. */
+} NetmapState;
+
+#ifndef __FreeBSD__
+#define pkt_copy bcopy
+#else
+/* A fast copy routine only for multiples of 64 bytes, non overlapped. */
+static inline void
+pkt_copy(const void *_src, void *_dst, int l)
+{
+ const uint64_t *src = _src;
+ uint64_t *dst = _dst;
+ if (unlikely(l >= 1024)) {
+ bcopy(src, dst, l);
+ return;
+ }
+ for (; l > 0; l -= 64) {
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ *dst++ = *src++;
+ }
+}
+#endif /* __FreeBSD__ */
+
+/*
+ * Open a netmap device. We assume there is only one queue
+ * (which is the case for the VALE bridge).
+ */
+static int netmap_open(NetmapPriv *me)
+{
+ int fd;
+ int err;
+ size_t l;
+ struct nmreq req;
+
+ me->fd = fd = open(me->fdname, O_RDWR);
+ if (fd < 0) {
+ error_report("Unable to open netmap device '%s' (%s)",
+ me->fdname, strerror(errno));
+ return -1;
+ }
+ memset(&req, 0, sizeof(req));
+ pstrcpy(req.nr_name, sizeof(req.nr_name), me->ifname);
+ req.nr_ringid = NETMAP_NO_TX_POLL;
+ req.nr_version = NETMAP_API;
+ err = ioctl(fd, NIOCREGIF, &req);
+ if (err) {
+ error_report("Unable to register %s: %s", me->ifname, strerror(errno));
+ goto error;
+ }
+ l = me->memsize = req.nr_memsize;
+
+ me->mem = mmap(0, l, PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0);
+ if (me->mem == MAP_FAILED) {
+ error_report("Unable to mmap netmap shared memory: %s",
+ strerror(errno));
+ me->mem = NULL;
+ goto error;
+ }
+
+ me->nifp = NETMAP_IF(me->mem, req.nr_offset);
+ me->tx = NETMAP_TXRING(me->nifp, 0);
+ me->rx = NETMAP_RXRING(me->nifp, 0);
+ return 0;
+
+error:
+ close(me->fd);
+ return -1;
+}
+
+static void netmap_send(void *opaque);
+static void netmap_writable(void *opaque);
+
+/* Set the event-loop handlers for the netmap backend. */
+static void netmap_update_fd_handler(NetmapState *s)
+{
+ qemu_set_fd_handler(s->me.fd,
+ s->read_poll ? netmap_send : NULL,
+ s->write_poll ? netmap_writable : NULL,
+ s);
+}
+
+/* Update the read handler. */
+static void netmap_read_poll(NetmapState *s, bool enable)
+{
+ if (s->read_poll != enable) { /* Do nothing if not changed. */
+ s->read_poll = enable;
+ netmap_update_fd_handler(s);
+ }
+}
+
+/* Update the write handler. */
+static void netmap_write_poll(NetmapState *s, bool enable)
+{
+ if (s->write_poll != enable) {
+ s->write_poll = enable;
+ netmap_update_fd_handler(s);
+ }
+}
+
+static void netmap_poll(NetClientState *nc, bool enable)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+
+ if (s->read_poll != enable || s->write_poll != enable) {
+ s->write_poll = enable;
+ s->read_poll = enable;
+ netmap_update_fd_handler(s);
+ }
+}
+
+/*
+ * The fd_write() callback, invoked if the fd is marked as
+ * writable after a poll. Unregister the handler and flush any
+ * buffered packets.
+ */
+static void netmap_writable(void *opaque)
+{
+ NetmapState *s = opaque;
+
+ netmap_write_poll(s, false);
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t netmap_receive(NetClientState *nc,
+ const uint8_t *buf, size_t size)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+ struct netmap_ring *ring = s->me.tx;
+ uint32_t i;
+ uint32_t idx;
+ uint8_t *dst;
+
+ if (unlikely(!ring)) {
+ /* Drop. */
+ return size;
+ }
+
+ if (unlikely(size > ring->nr_buf_size)) {
+ RD(5, "[netmap_receive] drop packet of size %d > %d\n",
+ (int)size, ring->nr_buf_size);
+ return size;
+ }
+
+ if (nm_ring_empty(ring)) {
+ /* No available slots in the netmap TX ring. */
+ netmap_write_poll(s, true);
+ return 0;
+ }
+
+ i = ring->cur;
+ idx = ring->slot[i].buf_idx;
+ dst = (uint8_t *)NETMAP_BUF(ring, idx);
+
+ ring->slot[i].len = size;
+ ring->slot[i].flags = 0;
+ pkt_copy(buf, dst, size);
+ ring->cur = ring->head = nm_ring_next(ring, i);
+ ioctl(s->me.fd, NIOCTXSYNC, NULL);
+
+ return size;
+}
+
+static ssize_t netmap_receive_iov(NetClientState *nc,
+ const struct iovec *iov, int iovcnt)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+ struct netmap_ring *ring = s->me.tx;
+ uint32_t last;
+ uint32_t idx;
+ uint8_t *dst;
+ int j;
+ uint32_t i;
+
+ if (unlikely(!ring)) {
+ /* Drop the packet. */
+ return iov_size(iov, iovcnt);
+ }
+
+ last = i = ring->cur;
+
+ if (nm_ring_space(ring) < iovcnt) {
+ /* Not enough netmap slots. */
+ netmap_write_poll(s, true);
+ return 0;
+ }
+
+ for (j = 0; j < iovcnt; j++) {
+ int iov_frag_size = iov[j].iov_len;
+ int offset = 0;
+ int nm_frag_size;
+
+ /* Split each iovec fragment over more netmap slots, if
+ necessary. */
+ while (iov_frag_size) {
+ nm_frag_size = MIN(iov_frag_size, ring->nr_buf_size);
+
+ if (unlikely(nm_ring_empty(ring))) {
+ /* We run out of netmap slots while splitting the
+ iovec fragments. */
+ netmap_write_poll(s, true);
+ return 0;
+ }
+
+ idx = ring->slot[i].buf_idx;
+ dst = (uint8_t *)NETMAP_BUF(ring, idx);
+
+ ring->slot[i].len = nm_frag_size;
+ ring->slot[i].flags = NS_MOREFRAG;
+ pkt_copy(iov[j].iov_base + offset, dst, nm_frag_size);
+
+ last = i;
+ i = nm_ring_next(ring, i);
+
+ offset += nm_frag_size;
+ iov_frag_size -= nm_frag_size;
+ }
+ }
+ /* The last slot must not have NS_MOREFRAG set. */
+ ring->slot[last].flags &= ~NS_MOREFRAG;
+
+ /* Now update ring->cur and ring->head. */
+ ring->cur = ring->head = i;
+
+ ioctl(s->me.fd, NIOCTXSYNC, NULL);
+
+ return iov_size(iov, iovcnt);
+}
+
+/* Complete a previous send (backend --> guest) and enable the
+ fd_read callback. */
+static void netmap_send_completed(NetClientState *nc, ssize_t len)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+
+ netmap_read_poll(s, true);
+}
+
+static void netmap_send(void *opaque)
+{
+ NetmapState *s = opaque;
+ struct netmap_ring *ring = s->me.rx;
+
+ /* Keep sending while there are available packets into the netmap
+ RX ring and the forwarding path towards the peer is open. */
+ while (!nm_ring_empty(ring)) {
+ uint32_t i;
+ uint32_t idx;
+ bool morefrag;
+ int iovcnt = 0;
+ int iovsize;
+
+ do {
+ i = ring->cur;
+ idx = ring->slot[i].buf_idx;
+ morefrag = (ring->slot[i].flags & NS_MOREFRAG);
+ s->iov[iovcnt].iov_base = (u_char *)NETMAP_BUF(ring, idx);
+ s->iov[iovcnt].iov_len = ring->slot[i].len;
+ iovcnt++;
+
+ ring->cur = ring->head = nm_ring_next(ring, i);
+ } while (!nm_ring_empty(ring) && morefrag);
+
+ if (unlikely(nm_ring_empty(ring) && morefrag)) {
+ RD(5, "[netmap_send] ran out of slots, with a pending"
+ "incomplete packet\n");
+ }
+
+ iovsize = qemu_sendv_packet_async(&s->nc, s->iov, iovcnt,
+ netmap_send_completed);
+
+ if (iovsize == 0) {
+ /* The peer does not receive anymore. Packet is queued, stop
+ * reading from the backend until netmap_send_completed()
+ */
+ netmap_read_poll(s, false);
+ break;
+ }
+ }
+}
+
+/* Flush and close. */
+static void netmap_cleanup(NetClientState *nc)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+
+ qemu_purge_queued_packets(nc);
+
+ netmap_poll(nc, false);
+ munmap(s->me.mem, s->me.memsize);
+ close(s->me.fd);
+
+ s->me.fd = -1;
+}
+
+/* Offloading manipulation support callbacks. */
+static bool netmap_has_ufo(NetClientState *nc)
+{
+ return true;
+}
+
+static bool netmap_has_vnet_hdr(NetClientState *nc)
+{
+ return true;
+}
+
+static bool netmap_has_vnet_hdr_len(NetClientState *nc, int len)
+{
+ return len == 0 || len == sizeof(struct virtio_net_hdr) ||
+ len == sizeof(struct virtio_net_hdr_mrg_rxbuf);
+}
+
+static void netmap_using_vnet_hdr(NetClientState *nc, bool enable)
+{
+}
+
+static void netmap_set_vnet_hdr_len(NetClientState *nc, int len)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+ int err;
+ struct nmreq req;
+
+ /* Issue a NETMAP_BDG_VNET_HDR command to change the virtio-net header
+ * length for the netmap adapter associated to 'me->ifname'.
+ */
+ memset(&req, 0, sizeof(req));
+ pstrcpy(req.nr_name, sizeof(req.nr_name), s->me.ifname);
+ req.nr_version = NETMAP_API;
+ req.nr_cmd = NETMAP_BDG_VNET_HDR;
+ req.nr_arg1 = len;
+ err = ioctl(s->me.fd, NIOCREGIF, &req);
+ if (err) {
+ error_report("Unable to execute NETMAP_BDG_VNET_HDR on %s: %s",
+ s->me.ifname, strerror(errno));
+ } else {
+ /* Keep track of the current length. */
+ s->vnet_hdr_len = len;
+ }
+}
+
+static void netmap_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
+ int ecn, int ufo)
+{
+ NetmapState *s = DO_UPCAST(NetmapState, nc, nc);
+
+ /* Setting a virtio-net header length greater than zero automatically
+ * enables the offloadings.
+ */
+ if (!s->vnet_hdr_len) {
+ netmap_set_vnet_hdr_len(nc, sizeof(struct virtio_net_hdr));
+ }
+}
+
+/* NetClientInfo methods */
+static NetClientInfo net_netmap_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_NETMAP,
+ .size = sizeof(NetmapState),
+ .receive = netmap_receive,
+ .receive_iov = netmap_receive_iov,
+ .poll = netmap_poll,
+ .cleanup = netmap_cleanup,
+ .has_ufo = netmap_has_ufo,
+ .has_vnet_hdr = netmap_has_vnet_hdr,
+ .has_vnet_hdr_len = netmap_has_vnet_hdr_len,
+ .using_vnet_hdr = netmap_using_vnet_hdr,
+ .set_offload = netmap_set_offload,
+ .set_vnet_hdr_len = netmap_set_vnet_hdr_len,
+};
+
+/* The exported init function
+ *
+ * ... -net netmap,ifname="..."
+ */
+int net_init_netmap(const NetClientOptions *opts,
+ const char *name, NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ const NetdevNetmapOptions *netmap_opts = opts->netmap;
+ NetClientState *nc;
+ NetmapPriv me;
+ NetmapState *s;
+
+ pstrcpy(me.fdname, sizeof(me.fdname),
+ netmap_opts->has_devname ? netmap_opts->devname : "/dev/netmap");
+ /* Set default name for the port if not supplied. */
+ pstrcpy(me.ifname, sizeof(me.ifname), netmap_opts->ifname);
+ if (netmap_open(&me)) {
+ return -1;
+ }
+ /* Create the object. */
+ nc = qemu_new_net_client(&net_netmap_info, peer, "netmap", name);
+ s = DO_UPCAST(NetmapState, nc, nc);
+ s->me = me;
+ s->vnet_hdr_len = 0;
+ netmap_read_poll(s, true); /* Initially only poll for reads. */
+
+ return 0;
+}
+
diff --git a/qemu/net/queue.c b/qemu/net/queue.c
new file mode 100644
index 000000000..ebbe2bb93
--- /dev/null
+++ b/qemu/net/queue.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "net/queue.h"
+#include "qemu/queue.h"
+#include "net/net.h"
+
+/* The delivery handler may only return zero if it will call
+ * qemu_net_queue_flush() when it determines that it is once again able
+ * to deliver packets. It must also call qemu_net_queue_purge() in its
+ * cleanup path.
+ *
+ * If a sent callback is provided to send(), the caller must handle a
+ * zero return from the delivery handler by not sending any more packets
+ * until we have invoked the callback. Only in that case will we queue
+ * the packet.
+ *
+ * If a sent callback isn't provided, we just drop the packet to avoid
+ * unbounded queueing.
+ */
+
+struct NetPacket {
+ QTAILQ_ENTRY(NetPacket) entry;
+ NetClientState *sender;
+ unsigned flags;
+ int size;
+ NetPacketSent *sent_cb;
+ uint8_t data[0];
+};
+
+struct NetQueue {
+ void *opaque;
+ uint32_t nq_maxlen;
+ uint32_t nq_count;
+
+ QTAILQ_HEAD(packets, NetPacket) packets;
+
+ unsigned delivering : 1;
+};
+
+NetQueue *qemu_new_net_queue(void *opaque)
+{
+ NetQueue *queue;
+
+ queue = g_new0(NetQueue, 1);
+
+ queue->opaque = opaque;
+ queue->nq_maxlen = 10000;
+ queue->nq_count = 0;
+
+ QTAILQ_INIT(&queue->packets);
+
+ queue->delivering = 0;
+
+ return queue;
+}
+
+void qemu_del_net_queue(NetQueue *queue)
+{
+ NetPacket *packet, *next;
+
+ QTAILQ_FOREACH_SAFE(packet, &queue->packets, entry, next) {
+ QTAILQ_REMOVE(&queue->packets, packet, entry);
+ g_free(packet);
+ }
+
+ g_free(queue);
+}
+
+static void qemu_net_queue_append(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const uint8_t *buf,
+ size_t size,
+ NetPacketSent *sent_cb)
+{
+ NetPacket *packet;
+
+ if (queue->nq_count >= queue->nq_maxlen && !sent_cb) {
+ return; /* drop if queue full and no callback */
+ }
+ packet = g_malloc(sizeof(NetPacket) + size);
+ packet->sender = sender;
+ packet->flags = flags;
+ packet->size = size;
+ packet->sent_cb = sent_cb;
+ memcpy(packet->data, buf, size);
+
+ queue->nq_count++;
+ QTAILQ_INSERT_TAIL(&queue->packets, packet, entry);
+}
+
+static void qemu_net_queue_append_iov(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const struct iovec *iov,
+ int iovcnt,
+ NetPacketSent *sent_cb)
+{
+ NetPacket *packet;
+ size_t max_len = 0;
+ int i;
+
+ if (queue->nq_count >= queue->nq_maxlen && !sent_cb) {
+ return; /* drop if queue full and no callback */
+ }
+ for (i = 0; i < iovcnt; i++) {
+ max_len += iov[i].iov_len;
+ }
+
+ packet = g_malloc(sizeof(NetPacket) + max_len);
+ packet->sender = sender;
+ packet->sent_cb = sent_cb;
+ packet->flags = flags;
+ packet->size = 0;
+
+ for (i = 0; i < iovcnt; i++) {
+ size_t len = iov[i].iov_len;
+
+ memcpy(packet->data + packet->size, iov[i].iov_base, len);
+ packet->size += len;
+ }
+
+ queue->nq_count++;
+ QTAILQ_INSERT_TAIL(&queue->packets, packet, entry);
+}
+
+static ssize_t qemu_net_queue_deliver(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const uint8_t *data,
+ size_t size)
+{
+ ssize_t ret = -1;
+
+ queue->delivering = 1;
+ ret = qemu_deliver_packet(sender, flags, data, size, queue->opaque);
+ queue->delivering = 0;
+
+ return ret;
+}
+
+static ssize_t qemu_net_queue_deliver_iov(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const struct iovec *iov,
+ int iovcnt)
+{
+ ssize_t ret = -1;
+
+ queue->delivering = 1;
+ ret = qemu_deliver_packet_iov(sender, flags, iov, iovcnt, queue->opaque);
+ queue->delivering = 0;
+
+ return ret;
+}
+
+ssize_t qemu_net_queue_send(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const uint8_t *data,
+ size_t size,
+ NetPacketSent *sent_cb)
+{
+ ssize_t ret;
+
+ if (queue->delivering || !qemu_can_send_packet(sender)) {
+ qemu_net_queue_append(queue, sender, flags, data, size, sent_cb);
+ return 0;
+ }
+
+ ret = qemu_net_queue_deliver(queue, sender, flags, data, size);
+ if (ret == 0) {
+ qemu_net_queue_append(queue, sender, flags, data, size, sent_cb);
+ return 0;
+ }
+
+ qemu_net_queue_flush(queue);
+
+ return ret;
+}
+
+ssize_t qemu_net_queue_send_iov(NetQueue *queue,
+ NetClientState *sender,
+ unsigned flags,
+ const struct iovec *iov,
+ int iovcnt,
+ NetPacketSent *sent_cb)
+{
+ ssize_t ret;
+
+ if (queue->delivering || !qemu_can_send_packet(sender)) {
+ qemu_net_queue_append_iov(queue, sender, flags, iov, iovcnt, sent_cb);
+ return 0;
+ }
+
+ ret = qemu_net_queue_deliver_iov(queue, sender, flags, iov, iovcnt);
+ if (ret == 0) {
+ qemu_net_queue_append_iov(queue, sender, flags, iov, iovcnt, sent_cb);
+ return 0;
+ }
+
+ qemu_net_queue_flush(queue);
+
+ return ret;
+}
+
+void qemu_net_queue_purge(NetQueue *queue, NetClientState *from)
+{
+ NetPacket *packet, *next;
+
+ QTAILQ_FOREACH_SAFE(packet, &queue->packets, entry, next) {
+ if (packet->sender == from) {
+ QTAILQ_REMOVE(&queue->packets, packet, entry);
+ queue->nq_count--;
+ if (packet->sent_cb) {
+ packet->sent_cb(packet->sender, 0);
+ }
+ g_free(packet);
+ }
+ }
+}
+
+bool qemu_net_queue_flush(NetQueue *queue)
+{
+ while (!QTAILQ_EMPTY(&queue->packets)) {
+ NetPacket *packet;
+ int ret;
+
+ packet = QTAILQ_FIRST(&queue->packets);
+ QTAILQ_REMOVE(&queue->packets, packet, entry);
+ queue->nq_count--;
+
+ ret = qemu_net_queue_deliver(queue,
+ packet->sender,
+ packet->flags,
+ packet->data,
+ packet->size);
+ if (ret == 0) {
+ queue->nq_count++;
+ QTAILQ_INSERT_HEAD(&queue->packets, packet, entry);
+ return false;
+ }
+
+ if (packet->sent_cb) {
+ packet->sent_cb(packet->sender, ret);
+ }
+
+ g_free(packet);
+ }
+ return true;
+}
diff --git a/qemu/net/slirp.c b/qemu/net/slirp.c
new file mode 100644
index 000000000..7657b38fd
--- /dev/null
+++ b/qemu/net/slirp.c
@@ -0,0 +1,805 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "net/slirp.h"
+
+#include "config-host.h"
+
+#ifndef _WIN32
+#include <pwd.h>
+#include <sys/wait.h>
+#endif
+#include "net/net.h"
+#include "clients.h"
+#include "hub.h"
+#include "monitor/monitor.h"
+#include "qemu/error-report.h"
+#include "qemu/sockets.h"
+#include "slirp/libslirp.h"
+#include "sysemu/char.h"
+
+static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
+{
+ const char *p, *p1;
+ int len;
+ p = *pp;
+ p1 = strchr(p, sep);
+ if (!p1)
+ return -1;
+ len = p1 - p;
+ p1++;
+ if (buf_size > 0) {
+ if (len > buf_size - 1)
+ len = buf_size - 1;
+ memcpy(buf, p, len);
+ buf[len] = '\0';
+ }
+ *pp = p1;
+ return 0;
+}
+
+/* slirp network adapter */
+
+#define SLIRP_CFG_HOSTFWD 1
+#define SLIRP_CFG_LEGACY 2
+
+struct slirp_config_str {
+ struct slirp_config_str *next;
+ int flags;
+ char str[1024];
+ int legacy_format;
+};
+
+typedef struct SlirpState {
+ NetClientState nc;
+ QTAILQ_ENTRY(SlirpState) entry;
+ Slirp *slirp;
+#ifndef _WIN32
+ char smb_dir[128];
+#endif
+} SlirpState;
+
+static struct slirp_config_str *slirp_configs;
+const char *legacy_tftp_prefix;
+const char *legacy_bootp_filename;
+static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
+ QTAILQ_HEAD_INITIALIZER(slirp_stacks);
+
+static int slirp_hostfwd(SlirpState *s, const char *redir_str,
+ int legacy_format);
+static int slirp_guestfwd(SlirpState *s, const char *config_str,
+ int legacy_format);
+
+#ifndef _WIN32
+static const char *legacy_smb_export;
+
+static int slirp_smb(SlirpState *s, const char *exported_dir,
+ struct in_addr vserver_addr);
+static void slirp_smb_cleanup(SlirpState *s);
+#else
+static inline void slirp_smb_cleanup(SlirpState *s) { }
+#endif
+
+void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
+{
+ SlirpState *s = opaque;
+
+ qemu_send_packet(&s->nc, pkt, pkt_len);
+}
+
+static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
+
+ slirp_input(s->slirp, buf, size);
+
+ return size;
+}
+
+static void net_slirp_cleanup(NetClientState *nc)
+{
+ SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
+
+ slirp_cleanup(s->slirp);
+ slirp_smb_cleanup(s);
+ QTAILQ_REMOVE(&slirp_stacks, s, entry);
+}
+
+static NetClientInfo net_slirp_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_USER,
+ .size = sizeof(SlirpState),
+ .receive = net_slirp_receive,
+ .cleanup = net_slirp_cleanup,
+};
+
+static int net_slirp_init(NetClientState *peer, const char *model,
+ const char *name, int restricted,
+ const char *vnetwork, const char *vhost,
+ const char *vhostname, const char *tftp_export,
+ const char *bootfile, const char *vdhcp_start,
+ const char *vnameserver, const char *smb_export,
+ const char *vsmbserver, const char **dnssearch)
+{
+ /* default settings according to historic slirp */
+ struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
+ struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
+ struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
+ struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
+ struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
+#ifndef _WIN32
+ struct in_addr smbsrv = { .s_addr = 0 };
+#endif
+ NetClientState *nc;
+ SlirpState *s;
+ char buf[20];
+ uint32_t addr;
+ int shift;
+ char *end;
+ struct slirp_config_str *config;
+
+ if (!tftp_export) {
+ tftp_export = legacy_tftp_prefix;
+ }
+ if (!bootfile) {
+ bootfile = legacy_bootp_filename;
+ }
+
+ if (vnetwork) {
+ if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
+ if (!inet_aton(vnetwork, &net)) {
+ return -1;
+ }
+ addr = ntohl(net.s_addr);
+ if (!(addr & 0x80000000)) {
+ mask.s_addr = htonl(0xff000000); /* class A */
+ } else if ((addr & 0xfff00000) == 0xac100000) {
+ mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
+ } else if ((addr & 0xc0000000) == 0x80000000) {
+ mask.s_addr = htonl(0xffff0000); /* class B */
+ } else if ((addr & 0xffff0000) == 0xc0a80000) {
+ mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
+ } else if ((addr & 0xffff0000) == 0xc6120000) {
+ mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
+ } else if ((addr & 0xe0000000) == 0xe0000000) {
+ mask.s_addr = htonl(0xffffff00); /* class C */
+ } else {
+ mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
+ }
+ } else {
+ if (!inet_aton(buf, &net)) {
+ return -1;
+ }
+ shift = strtol(vnetwork, &end, 10);
+ if (*end != '\0') {
+ if (!inet_aton(vnetwork, &mask)) {
+ return -1;
+ }
+ } else if (shift < 4 || shift > 32) {
+ return -1;
+ } else {
+ mask.s_addr = htonl(0xffffffff << (32 - shift));
+ }
+ }
+ net.s_addr &= mask.s_addr;
+ host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
+ dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
+ dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
+ }
+
+ if (vhost && !inet_aton(vhost, &host)) {
+ return -1;
+ }
+ if ((host.s_addr & mask.s_addr) != net.s_addr) {
+ return -1;
+ }
+
+ if (vnameserver && !inet_aton(vnameserver, &dns)) {
+ return -1;
+ }
+ if ((dns.s_addr & mask.s_addr) != net.s_addr ||
+ dns.s_addr == host.s_addr) {
+ return -1;
+ }
+
+ if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
+ return -1;
+ }
+ if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
+ dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
+ return -1;
+ }
+
+#ifndef _WIN32
+ if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
+ return -1;
+ }
+#endif
+
+ nc = qemu_new_net_client(&net_slirp_info, peer, model, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "net=%s,restrict=%s", inet_ntoa(net),
+ restricted ? "on" : "off");
+
+ s = DO_UPCAST(SlirpState, nc, nc);
+
+ s->slirp = slirp_init(restricted, net, mask, host, vhostname,
+ tftp_export, bootfile, dhcp, dns, dnssearch, s);
+ QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
+
+ for (config = slirp_configs; config; config = config->next) {
+ if (config->flags & SLIRP_CFG_HOSTFWD) {
+ if (slirp_hostfwd(s, config->str,
+ config->flags & SLIRP_CFG_LEGACY) < 0)
+ goto error;
+ } else {
+ if (slirp_guestfwd(s, config->str,
+ config->flags & SLIRP_CFG_LEGACY) < 0)
+ goto error;
+ }
+ }
+#ifndef _WIN32
+ if (!smb_export) {
+ smb_export = legacy_smb_export;
+ }
+ if (smb_export) {
+ if (slirp_smb(s, smb_export, smbsrv) < 0)
+ goto error;
+ }
+#endif
+
+ return 0;
+
+error:
+ qemu_del_net_client(nc);
+ return -1;
+}
+
+static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
+ const char *stack)
+{
+
+ if (vlan) {
+ NetClientState *nc;
+ nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack);
+ if (!nc) {
+ monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n");
+ return NULL;
+ }
+ if (strcmp(nc->model, "user")) {
+ monitor_printf(mon, "invalid device specified\n");
+ return NULL;
+ }
+ return DO_UPCAST(SlirpState, nc, nc);
+ } else {
+ if (QTAILQ_EMPTY(&slirp_stacks)) {
+ monitor_printf(mon, "user mode network stack not in use\n");
+ return NULL;
+ }
+ return QTAILQ_FIRST(&slirp_stacks);
+ }
+}
+
+void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
+{
+ struct in_addr host_addr = { .s_addr = INADDR_ANY };
+ int host_port;
+ char buf[256];
+ const char *src_str, *p;
+ SlirpState *s;
+ int is_udp = 0;
+ int err;
+ const char *arg1 = qdict_get_str(qdict, "arg1");
+ const char *arg2 = qdict_get_try_str(qdict, "arg2");
+ const char *arg3 = qdict_get_try_str(qdict, "arg3");
+
+ if (arg2) {
+ s = slirp_lookup(mon, arg1, arg2);
+ src_str = arg3;
+ } else {
+ s = slirp_lookup(mon, NULL, NULL);
+ src_str = arg1;
+ }
+ if (!s) {
+ return;
+ }
+
+ p = src_str;
+ if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+
+ if (!strcmp(buf, "tcp") || buf[0] == '\0') {
+ is_udp = 0;
+ } else if (!strcmp(buf, "udp")) {
+ is_udp = 1;
+ } else {
+ goto fail_syntax;
+ }
+
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
+ goto fail_syntax;
+ }
+
+ host_port = atoi(p);
+
+ err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
+
+ monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
+ err ? "not found" : "removed");
+ return;
+
+ fail_syntax:
+ monitor_printf(mon, "invalid format\n");
+}
+
+static int slirp_hostfwd(SlirpState *s, const char *redir_str,
+ int legacy_format)
+{
+ struct in_addr host_addr = { .s_addr = INADDR_ANY };
+ struct in_addr guest_addr = { .s_addr = 0 };
+ int host_port, guest_port;
+ const char *p;
+ char buf[256];
+ int is_udp;
+ char *end;
+
+ p = redir_str;
+ if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (!strcmp(buf, "tcp") || buf[0] == '\0') {
+ is_udp = 0;
+ } else if (!strcmp(buf, "udp")) {
+ is_udp = 1;
+ } else {
+ goto fail_syntax;
+ }
+
+ if (!legacy_format) {
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
+ goto fail_syntax;
+ }
+ }
+
+ if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
+ goto fail_syntax;
+ }
+ host_port = strtol(buf, &end, 0);
+ if (*end != '\0' || host_port < 1 || host_port > 65535) {
+ goto fail_syntax;
+ }
+
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
+ goto fail_syntax;
+ }
+
+ guest_port = strtol(p, &end, 0);
+ if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
+ goto fail_syntax;
+ }
+
+ if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
+ guest_port) < 0) {
+ error_report("could not set up host forwarding rule '%s'",
+ redir_str);
+ return -1;
+ }
+ return 0;
+
+ fail_syntax:
+ error_report("invalid host forwarding rule '%s'", redir_str);
+ return -1;
+}
+
+void hmp_hostfwd_add(Monitor *mon, const QDict *qdict)
+{
+ const char *redir_str;
+ SlirpState *s;
+ const char *arg1 = qdict_get_str(qdict, "arg1");
+ const char *arg2 = qdict_get_try_str(qdict, "arg2");
+ const char *arg3 = qdict_get_try_str(qdict, "arg3");
+
+ if (arg2) {
+ s = slirp_lookup(mon, arg1, arg2);
+ redir_str = arg3;
+ } else {
+ s = slirp_lookup(mon, NULL, NULL);
+ redir_str = arg1;
+ }
+ if (s) {
+ slirp_hostfwd(s, redir_str, 0);
+ }
+
+}
+
+int net_slirp_redir(const char *redir_str)
+{
+ struct slirp_config_str *config;
+
+ if (QTAILQ_EMPTY(&slirp_stacks)) {
+ config = g_malloc(sizeof(*config));
+ pstrcpy(config->str, sizeof(config->str), redir_str);
+ config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
+ config->next = slirp_configs;
+ slirp_configs = config;
+ return 0;
+ }
+
+ return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
+}
+
+#ifndef _WIN32
+
+/* automatic user mode samba server configuration */
+static void slirp_smb_cleanup(SlirpState *s)
+{
+ char cmd[128];
+ int ret;
+
+ if (s->smb_dir[0] != '\0') {
+ snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
+ ret = system(cmd);
+ if (ret == -1 || !WIFEXITED(ret)) {
+ error_report("'%s' failed.", cmd);
+ } else if (WEXITSTATUS(ret)) {
+ error_report("'%s' failed. Error code: %d",
+ cmd, WEXITSTATUS(ret));
+ }
+ s->smb_dir[0] = '\0';
+ }
+}
+
+static int slirp_smb(SlirpState* s, const char *exported_dir,
+ struct in_addr vserver_addr)
+{
+ char smb_conf[128];
+ char smb_cmdline[128];
+ struct passwd *passwd;
+ FILE *f;
+
+ passwd = getpwuid(geteuid());
+ if (!passwd) {
+ error_report("failed to retrieve user name");
+ return -1;
+ }
+
+ if (access(CONFIG_SMBD_COMMAND, F_OK)) {
+ error_report("could not find '%s', please install it",
+ CONFIG_SMBD_COMMAND);
+ return -1;
+ }
+
+ if (access(exported_dir, R_OK | X_OK)) {
+ error_report("error accessing shared directory '%s': %s",
+ exported_dir, strerror(errno));
+ return -1;
+ }
+
+ snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.XXXXXX");
+ if (!mkdtemp(s->smb_dir)) {
+ error_report("could not create samba server dir '%s'", s->smb_dir);
+ s->smb_dir[0] = 0;
+ return -1;
+ }
+ snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
+
+ f = fopen(smb_conf, "w");
+ if (!f) {
+ slirp_smb_cleanup(s);
+ error_report("could not create samba server configuration file '%s'",
+ smb_conf);
+ return -1;
+ }
+ fprintf(f,
+ "[global]\n"
+ "private dir=%s\n"
+ "interfaces=127.0.0.1\n"
+ "bind interfaces only=yes\n"
+ "pid directory=%s\n"
+ "lock directory=%s\n"
+ "state directory=%s\n"
+ "cache directory=%s\n"
+ "ncalrpc dir=%s/ncalrpc\n"
+ "log file=%s/log.smbd\n"
+ "smb passwd file=%s/smbpasswd\n"
+ "security = user\n"
+ "map to guest = Bad User\n"
+ "load printers = no\n"
+ "printing = bsd\n"
+ "disable spoolss = yes\n"
+ "usershare max shares = 0\n"
+ "[qemu]\n"
+ "path=%s\n"
+ "read only=no\n"
+ "guest ok=yes\n"
+ "force user=%s\n",
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ s->smb_dir,
+ exported_dir,
+ passwd->pw_name
+ );
+ fclose(f);
+
+ snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -l %s -s %s",
+ CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf);
+
+ if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 ||
+ slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) {
+ slirp_smb_cleanup(s);
+ error_report("conflicting/invalid smbserver address");
+ return -1;
+ }
+ return 0;
+}
+
+/* automatic user mode samba server configuration (legacy interface) */
+int net_slirp_smb(const char *exported_dir)
+{
+ struct in_addr vserver_addr = { .s_addr = 0 };
+
+ if (legacy_smb_export) {
+ fprintf(stderr, "-smb given twice\n");
+ return -1;
+ }
+ legacy_smb_export = exported_dir;
+ if (!QTAILQ_EMPTY(&slirp_stacks)) {
+ return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
+ vserver_addr);
+ }
+ return 0;
+}
+
+#endif /* !defined(_WIN32) */
+
+struct GuestFwd {
+ CharDriverState *hd;
+ struct in_addr server;
+ int port;
+ Slirp *slirp;
+};
+
+static int guestfwd_can_read(void *opaque)
+{
+ struct GuestFwd *fwd = opaque;
+ return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
+}
+
+static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
+{
+ struct GuestFwd *fwd = opaque;
+ slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
+}
+
+static int slirp_guestfwd(SlirpState *s, const char *config_str,
+ int legacy_format)
+{
+ struct in_addr server = { .s_addr = 0 };
+ struct GuestFwd *fwd;
+ const char *p;
+ char buf[128];
+ char *end;
+ int port;
+
+ p = config_str;
+ if (legacy_format) {
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ } else {
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (strcmp(buf, "tcp") && buf[0] != '\0') {
+ goto fail_syntax;
+ }
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (buf[0] != '\0' && !inet_aton(buf, &server)) {
+ goto fail_syntax;
+ }
+ if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
+ goto fail_syntax;
+ }
+ }
+ port = strtol(buf, &end, 10);
+ if (*end != '\0' || port < 1 || port > 65535) {
+ goto fail_syntax;
+ }
+
+ snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
+
+ if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) {
+ if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) {
+ error_report("conflicting/invalid host:port in guest forwarding "
+ "rule '%s'", config_str);
+ return -1;
+ }
+ } else {
+ fwd = g_new(struct GuestFwd, 1);
+ fwd->hd = qemu_chr_new(buf, p, NULL);
+ if (!fwd->hd) {
+ error_report("could not open guest forwarding device '%s'", buf);
+ g_free(fwd);
+ return -1;
+ }
+
+ if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
+ error_report("conflicting/invalid host:port in guest forwarding "
+ "rule '%s'", config_str);
+ g_free(fwd);
+ return -1;
+ }
+ fwd->server = server;
+ fwd->port = port;
+ fwd->slirp = s->slirp;
+
+ qemu_chr_fe_claim_no_fail(fwd->hd);
+ qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
+ NULL, fwd);
+ }
+ return 0;
+
+ fail_syntax:
+ error_report("invalid guest forwarding rule '%s'", config_str);
+ return -1;
+}
+
+void hmp_info_usernet(Monitor *mon, const QDict *qdict)
+{
+ SlirpState *s;
+
+ QTAILQ_FOREACH(s, &slirp_stacks, entry) {
+ int id;
+ bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0;
+ monitor_printf(mon, "VLAN %d (%s):\n",
+ got_vlan_id ? id : -1,
+ s->nc.name);
+ slirp_connection_info(s->slirp, mon);
+ }
+}
+
+static void
+net_init_slirp_configs(const StringList *fwd, int flags)
+{
+ while (fwd) {
+ struct slirp_config_str *config;
+
+ config = g_malloc0(sizeof(*config));
+ pstrcpy(config->str, sizeof(config->str), fwd->value->str);
+ config->flags = flags;
+ config->next = slirp_configs;
+ slirp_configs = config;
+
+ fwd = fwd->next;
+ }
+}
+
+static const char **slirp_dnssearch(const StringList *dnsname)
+{
+ const StringList *c = dnsname;
+ size_t i = 0, num_opts = 0;
+ const char **ret;
+
+ while (c) {
+ num_opts++;
+ c = c->next;
+ }
+
+ if (num_opts == 0) {
+ return NULL;
+ }
+
+ ret = g_malloc((num_opts + 1) * sizeof(*ret));
+ c = dnsname;
+ while (c) {
+ ret[i++] = c->value->str;
+ c = c->next;
+ }
+ ret[i] = NULL;
+ return ret;
+}
+
+int net_init_slirp(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ struct slirp_config_str *config;
+ char *vnet;
+ int ret;
+ const NetdevUserOptions *user;
+ const char **dnssearch;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_USER);
+ user = opts->user;
+
+ vnet = user->has_net ? g_strdup(user->net) :
+ user->has_ip ? g_strdup_printf("%s/24", user->ip) :
+ NULL;
+
+ dnssearch = slirp_dnssearch(user->dnssearch);
+
+ /* all optional fields are initialized to "all bits zero" */
+
+ net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD);
+ net_init_slirp_configs(user->guestfwd, 0);
+
+ ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet,
+ user->host, user->hostname, user->tftp,
+ user->bootfile, user->dhcpstart, user->dns, user->smb,
+ user->smbserver, dnssearch);
+
+ while (slirp_configs) {
+ config = slirp_configs;
+ slirp_configs = config->next;
+ g_free(config);
+ }
+
+ g_free(vnet);
+ g_free(dnssearch);
+
+ return ret;
+}
+
+int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
+{
+ if (strcmp(opts_list->name, "net") != 0 ||
+ strncmp(optarg, "channel,", strlen("channel,")) != 0) {
+ return 0;
+ }
+
+ /* handle legacy -net channel,port:chr */
+ optarg += strlen("channel,");
+
+ if (QTAILQ_EMPTY(&slirp_stacks)) {
+ struct slirp_config_str *config;
+
+ config = g_malloc(sizeof(*config));
+ pstrcpy(config->str, sizeof(config->str), optarg);
+ config->flags = SLIRP_CFG_LEGACY;
+ config->next = slirp_configs;
+ slirp_configs = config;
+ *ret = 0;
+ } else {
+ *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
+ }
+
+ return 1;
+}
+
diff --git a/qemu/net/socket.c b/qemu/net/socket.c
new file mode 100644
index 000000000..b1e3b1c8d
--- /dev/null
+++ b/qemu/net/socket.c
@@ -0,0 +1,774 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "config-host.h"
+
+#include "net/net.h"
+#include "clients.h"
+#include "monitor/monitor.h"
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/sockets.h"
+#include "qemu/iov.h"
+#include "qemu/main-loop.h"
+
+typedef struct NetSocketState {
+ NetClientState nc;
+ int listen_fd;
+ int fd;
+ int state; /* 0 = getting length, 1 = getting data */
+ unsigned int index;
+ unsigned int packet_len;
+ unsigned int send_index; /* number of bytes sent (only SOCK_STREAM) */
+ uint8_t buf[NET_BUFSIZE];
+ struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
+ IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
+ bool read_poll; /* waiting to receive data? */
+ bool write_poll; /* waiting to transmit data? */
+} NetSocketState;
+
+static void net_socket_accept(void *opaque);
+static void net_socket_writable(void *opaque);
+
+static void net_socket_update_fd_handler(NetSocketState *s)
+{
+ qemu_set_fd_handler(s->fd,
+ s->read_poll ? s->send_fn : NULL,
+ s->write_poll ? net_socket_writable : NULL,
+ s);
+}
+
+static void net_socket_read_poll(NetSocketState *s, bool enable)
+{
+ s->read_poll = enable;
+ net_socket_update_fd_handler(s);
+}
+
+static void net_socket_write_poll(NetSocketState *s, bool enable)
+{
+ s->write_poll = enable;
+ net_socket_update_fd_handler(s);
+}
+
+static void net_socket_writable(void *opaque)
+{
+ NetSocketState *s = opaque;
+
+ net_socket_write_poll(s, false);
+
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t net_socket_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
+ uint32_t len = htonl(size);
+ struct iovec iov[] = {
+ {
+ .iov_base = &len,
+ .iov_len = sizeof(len),
+ }, {
+ .iov_base = (void *)buf,
+ .iov_len = size,
+ },
+ };
+ size_t remaining;
+ ssize_t ret;
+
+ remaining = iov_size(iov, 2) - s->send_index;
+ ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
+
+ if (ret == -1 && errno == EAGAIN) {
+ ret = 0; /* handled further down */
+ }
+ if (ret == -1) {
+ s->send_index = 0;
+ return -errno;
+ }
+ if (ret < (ssize_t)remaining) {
+ s->send_index += ret;
+ net_socket_write_poll(s, true);
+ return 0;
+ }
+ s->send_index = 0;
+ return size;
+}
+
+static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
+ ssize_t ret;
+
+ do {
+ ret = qemu_sendto(s->fd, buf, size, 0,
+ (struct sockaddr *)&s->dgram_dst,
+ sizeof(s->dgram_dst));
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 && errno == EAGAIN) {
+ net_socket_write_poll(s, true);
+ return 0;
+ }
+ return ret;
+}
+
+static void net_socket_send_completed(NetClientState *nc, ssize_t len)
+{
+ NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
+
+ if (!s->read_poll) {
+ net_socket_read_poll(s, true);
+ }
+}
+
+static void net_socket_send(void *opaque)
+{
+ NetSocketState *s = opaque;
+ int size, err;
+ unsigned l;
+ uint8_t buf1[NET_BUFSIZE];
+ const uint8_t *buf;
+
+ size = qemu_recv(s->fd, buf1, sizeof(buf1), 0);
+ if (size < 0) {
+ err = socket_error();
+ if (err != EWOULDBLOCK)
+ goto eoc;
+ } else if (size == 0) {
+ /* end of connection */
+ eoc:
+ net_socket_read_poll(s, false);
+ net_socket_write_poll(s, false);
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
+ }
+ closesocket(s->fd);
+
+ s->fd = -1;
+ s->state = 0;
+ s->index = 0;
+ s->packet_len = 0;
+ s->nc.link_down = true;
+ memset(s->buf, 0, sizeof(s->buf));
+ memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
+
+ return;
+ }
+ buf = buf1;
+ while (size > 0) {
+ /* reassemble a packet from the network */
+ switch(s->state) {
+ case 0:
+ l = 4 - s->index;
+ if (l > size)
+ l = size;
+ memcpy(s->buf + s->index, buf, l);
+ buf += l;
+ size -= l;
+ s->index += l;
+ if (s->index == 4) {
+ /* got length */
+ s->packet_len = ntohl(*(uint32_t *)s->buf);
+ s->index = 0;
+ s->state = 1;
+ }
+ break;
+ case 1:
+ l = s->packet_len - s->index;
+ if (l > size)
+ l = size;
+ if (s->index + l <= sizeof(s->buf)) {
+ memcpy(s->buf + s->index, buf, l);
+ } else {
+ fprintf(stderr, "serious error: oversized packet received,"
+ "connection terminated.\n");
+ s->state = 0;
+ goto eoc;
+ }
+
+ s->index += l;
+ buf += l;
+ size -= l;
+ if (s->index >= s->packet_len) {
+ s->index = 0;
+ s->state = 0;
+ if (qemu_send_packet_async(&s->nc, s->buf, s->packet_len,
+ net_socket_send_completed) == 0) {
+ net_socket_read_poll(s, false);
+ break;
+ }
+ }
+ break;
+ }
+ }
+}
+
+static void net_socket_send_dgram(void *opaque)
+{
+ NetSocketState *s = opaque;
+ int size;
+
+ size = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
+ if (size < 0)
+ return;
+ if (size == 0) {
+ /* end of connection */
+ net_socket_read_poll(s, false);
+ net_socket_write_poll(s, false);
+ return;
+ }
+ if (qemu_send_packet_async(&s->nc, s->buf, size,
+ net_socket_send_completed) == 0) {
+ net_socket_read_poll(s, false);
+ }
+}
+
+static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr *localaddr)
+{
+ struct ip_mreq imr;
+ int fd;
+ int val, ret;
+#ifdef __OpenBSD__
+ unsigned char loop;
+#else
+ int loop;
+#endif
+
+ if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
+ fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) "
+ "does not contain a multicast address\n",
+ inet_ntoa(mcastaddr->sin_addr),
+ (int)ntohl(mcastaddr->sin_addr.s_addr));
+ return -1;
+
+ }
+ fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket(PF_INET, SOCK_DGRAM)");
+ return -1;
+ }
+
+ /* Allow multiple sockets to bind the same multicast ip and port by setting
+ * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set
+ * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR
+ * only on posix systems.
+ */
+ val = 1;
+ ret = qemu_setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+ if (ret < 0) {
+ perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
+ goto fail;
+ }
+
+ ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
+ if (ret < 0) {
+ perror("bind");
+ goto fail;
+ }
+
+ /* Add host to multicast group */
+ imr.imr_multiaddr = mcastaddr->sin_addr;
+ if (localaddr) {
+ imr.imr_interface = *localaddr;
+ } else {
+ imr.imr_interface.s_addr = htonl(INADDR_ANY);
+ }
+
+ ret = qemu_setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+ &imr, sizeof(struct ip_mreq));
+ if (ret < 0) {
+ perror("setsockopt(IP_ADD_MEMBERSHIP)");
+ goto fail;
+ }
+
+ /* Force mcast msgs to loopback (eg. several QEMUs in same host */
+ loop = 1;
+ ret = qemu_setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
+ &loop, sizeof(loop));
+ if (ret < 0) {
+ perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
+ goto fail;
+ }
+
+ /* If a bind address is given, only send packets from that address */
+ if (localaddr != NULL) {
+ ret = qemu_setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
+ localaddr, sizeof(*localaddr));
+ if (ret < 0) {
+ perror("setsockopt(IP_MULTICAST_IF)");
+ goto fail;
+ }
+ }
+
+ qemu_set_nonblock(fd);
+ return fd;
+fail:
+ if (fd >= 0)
+ closesocket(fd);
+ return -1;
+}
+
+static void net_socket_cleanup(NetClientState *nc)
+{
+ NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
+ if (s->fd != -1) {
+ net_socket_read_poll(s, false);
+ net_socket_write_poll(s, false);
+ close(s->fd);
+ s->fd = -1;
+ }
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ closesocket(s->listen_fd);
+ s->listen_fd = -1;
+ }
+}
+
+static NetClientInfo net_dgram_socket_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_SOCKET,
+ .size = sizeof(NetSocketState),
+ .receive = net_socket_receive_dgram,
+ .cleanup = net_socket_cleanup,
+};
+
+static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
+ const char *model,
+ const char *name,
+ int fd, int is_connected)
+{
+ struct sockaddr_in saddr;
+ int newfd;
+ socklen_t saddr_len = sizeof(saddr);
+ NetClientState *nc;
+ NetSocketState *s;
+
+ /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
+ * Because this may be "shared" socket from a "master" process, datagrams would be recv()
+ * by ONLY ONE process: we must "clone" this dgram socket --jjo
+ */
+
+ if (is_connected) {
+ if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
+ /* must be bound */
+ if (saddr.sin_addr.s_addr == 0) {
+ fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, "
+ "cannot setup multicast dst addr\n", fd);
+ goto err;
+ }
+ /* clone dgram socket */
+ newfd = net_socket_mcast_create(&saddr, NULL);
+ if (newfd < 0) {
+ /* error already reported by net_socket_mcast_create() */
+ goto err;
+ }
+ /* clone newfd to fd, close newfd */
+ dup2(newfd, fd);
+ close(newfd);
+
+ } else {
+ fprintf(stderr,
+ "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
+ fd, strerror(errno));
+ goto err;
+ }
+ }
+
+ nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
+
+ s = DO_UPCAST(NetSocketState, nc, nc);
+
+ s->fd = fd;
+ s->listen_fd = -1;
+ s->send_fn = net_socket_send_dgram;
+ net_socket_read_poll(s, true);
+
+ /* mcast: save bound address as dst */
+ if (is_connected) {
+ s->dgram_dst = saddr;
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "socket: fd=%d (cloned mcast=%s:%d)",
+ fd, inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ } else {
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "socket: fd=%d", fd);
+ }
+
+ return s;
+
+err:
+ closesocket(fd);
+ return NULL;
+}
+
+static void net_socket_connect(void *opaque)
+{
+ NetSocketState *s = opaque;
+ s->send_fn = net_socket_send;
+ net_socket_read_poll(s, true);
+}
+
+static NetClientInfo net_socket_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_SOCKET,
+ .size = sizeof(NetSocketState),
+ .receive = net_socket_receive,
+ .cleanup = net_socket_cleanup,
+};
+
+static NetSocketState *net_socket_fd_init_stream(NetClientState *peer,
+ const char *model,
+ const char *name,
+ int fd, int is_connected)
+{
+ NetClientState *nc;
+ NetSocketState *s;
+
+ nc = qemu_new_net_client(&net_socket_info, peer, model, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
+
+ s = DO_UPCAST(NetSocketState, nc, nc);
+
+ s->fd = fd;
+ s->listen_fd = -1;
+
+ /* Disable Nagle algorithm on TCP sockets to reduce latency */
+ socket_set_nodelay(fd);
+
+ if (is_connected) {
+ net_socket_connect(s);
+ } else {
+ qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
+ }
+ return s;
+}
+
+static NetSocketState *net_socket_fd_init(NetClientState *peer,
+ const char *model, const char *name,
+ int fd, int is_connected)
+{
+ int so_type = -1, optlen=sizeof(so_type);
+
+ if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
+ (socklen_t *)&optlen)< 0) {
+ fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n",
+ fd);
+ closesocket(fd);
+ return NULL;
+ }
+ switch(so_type) {
+ case SOCK_DGRAM:
+ return net_socket_fd_init_dgram(peer, model, name, fd, is_connected);
+ case SOCK_STREAM:
+ return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
+ default:
+ /* who knows ... this could be a eg. a pty, do warn and continue as stream */
+ fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
+ return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
+ }
+ return NULL;
+}
+
+static void net_socket_accept(void *opaque)
+{
+ NetSocketState *s = opaque;
+ struct sockaddr_in saddr;
+ socklen_t len;
+ int fd;
+
+ for(;;) {
+ len = sizeof(saddr);
+ fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
+ if (fd < 0 && errno != EINTR) {
+ return;
+ } else if (fd >= 0) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ break;
+ }
+ }
+
+ s->fd = fd;
+ s->nc.link_down = false;
+ net_socket_connect(s);
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "socket: connection from %s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+}
+
+static int net_socket_listen_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ const char *host_str)
+{
+ NetClientState *nc;
+ NetSocketState *s;
+ struct sockaddr_in saddr;
+ int fd, ret;
+
+ if (parse_host_port(&saddr, host_str) < 0)
+ return -1;
+
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ return -1;
+ }
+ qemu_set_nonblock(fd);
+
+ socket_set_fast_reuse(fd);
+
+ ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
+ if (ret < 0) {
+ perror("bind");
+ closesocket(fd);
+ return -1;
+ }
+ ret = listen(fd, 0);
+ if (ret < 0) {
+ perror("listen");
+ closesocket(fd);
+ return -1;
+ }
+
+ nc = qemu_new_net_client(&net_socket_info, peer, model, name);
+ s = DO_UPCAST(NetSocketState, nc, nc);
+ s->fd = -1;
+ s->listen_fd = fd;
+ s->nc.link_down = true;
+
+ qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
+ return 0;
+}
+
+static int net_socket_connect_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ const char *host_str)
+{
+ NetSocketState *s;
+ int fd, connected, ret, err;
+ struct sockaddr_in saddr;
+
+ if (parse_host_port(&saddr, host_str) < 0)
+ return -1;
+
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ return -1;
+ }
+ qemu_set_nonblock(fd);
+
+ connected = 0;
+ for(;;) {
+ ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
+ if (ret < 0) {
+ err = socket_error();
+ if (err == EINTR || err == EWOULDBLOCK) {
+ } else if (err == EINPROGRESS) {
+ break;
+#ifdef _WIN32
+ } else if (err == WSAEALREADY || err == WSAEINVAL) {
+ break;
+#endif
+ } else {
+ perror("connect");
+ closesocket(fd);
+ return -1;
+ }
+ } else {
+ connected = 1;
+ break;
+ }
+ }
+ s = net_socket_fd_init(peer, model, name, fd, connected);
+ if (!s)
+ return -1;
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "socket: connect to %s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ return 0;
+}
+
+static int net_socket_mcast_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ const char *host_str,
+ const char *localaddr_str)
+{
+ NetSocketState *s;
+ int fd;
+ struct sockaddr_in saddr;
+ struct in_addr localaddr, *param_localaddr;
+
+ if (parse_host_port(&saddr, host_str) < 0)
+ return -1;
+
+ if (localaddr_str != NULL) {
+ if (inet_aton(localaddr_str, &localaddr) == 0)
+ return -1;
+ param_localaddr = &localaddr;
+ } else {
+ param_localaddr = NULL;
+ }
+
+ fd = net_socket_mcast_create(&saddr, param_localaddr);
+ if (fd < 0)
+ return -1;
+
+ s = net_socket_fd_init(peer, model, name, fd, 0);
+ if (!s)
+ return -1;
+
+ s->dgram_dst = saddr;
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "socket: mcast=%s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ return 0;
+
+}
+
+static int net_socket_udp_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ const char *rhost,
+ const char *lhost)
+{
+ NetSocketState *s;
+ int fd, ret;
+ struct sockaddr_in laddr, raddr;
+
+ if (parse_host_port(&laddr, lhost) < 0) {
+ return -1;
+ }
+
+ if (parse_host_port(&raddr, rhost) < 0) {
+ return -1;
+ }
+
+ fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket(PF_INET, SOCK_DGRAM)");
+ return -1;
+ }
+
+ ret = socket_set_fast_reuse(fd);
+ if (ret < 0) {
+ closesocket(fd);
+ return -1;
+ }
+ ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr));
+ if (ret < 0) {
+ perror("bind");
+ closesocket(fd);
+ return -1;
+ }
+ qemu_set_nonblock(fd);
+
+ s = net_socket_fd_init(peer, model, name, fd, 0);
+ if (!s) {
+ return -1;
+ }
+
+ s->dgram_dst = raddr;
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "socket: udp=%s:%d",
+ inet_ntoa(raddr.sin_addr), ntohs(raddr.sin_port));
+ return 0;
+}
+
+int net_init_socket(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ Error *err = NULL;
+ const NetdevSocketOptions *sock;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_SOCKET);
+ sock = opts->socket;
+
+ if (sock->has_fd + sock->has_listen + sock->has_connect + sock->has_mcast +
+ sock->has_udp != 1) {
+ error_report("exactly one of fd=, listen=, connect=, mcast= or udp="
+ " is required");
+ return -1;
+ }
+
+ if (sock->has_localaddr && !sock->has_mcast && !sock->has_udp) {
+ error_report("localaddr= is only valid with mcast= or udp=");
+ return -1;
+ }
+
+ if (sock->has_fd) {
+ int fd;
+
+ fd = monitor_fd_param(cur_mon, sock->fd, &err);
+ if (fd == -1) {
+ error_report_err(err);
+ return -1;
+ }
+ qemu_set_nonblock(fd);
+ if (!net_socket_fd_init(peer, "socket", name, fd, 1)) {
+ return -1;
+ }
+ return 0;
+ }
+
+ if (sock->has_listen) {
+ if (net_socket_listen_init(peer, "socket", name, sock->listen) == -1) {
+ return -1;
+ }
+ return 0;
+ }
+
+ if (sock->has_connect) {
+ if (net_socket_connect_init(peer, "socket", name, sock->connect) ==
+ -1) {
+ return -1;
+ }
+ return 0;
+ }
+
+ if (sock->has_mcast) {
+ /* if sock->localaddr is missing, it has been initialized to "all bits
+ * zero" */
+ if (net_socket_mcast_init(peer, "socket", name, sock->mcast,
+ sock->localaddr) == -1) {
+ return -1;
+ }
+ return 0;
+ }
+
+ assert(sock->has_udp);
+ if (!sock->has_localaddr) {
+ error_report("localaddr= is mandatory with udp=");
+ return -1;
+ }
+ if (net_socket_udp_init(peer, "socket", name, sock->udp, sock->localaddr) ==
+ -1) {
+ return -1;
+ }
+ return 0;
+}
diff --git a/qemu/net/tap-aix.c b/qemu/net/tap-aix.c
new file mode 100644
index 000000000..e84fc3913
--- /dev/null
+++ b/qemu/net/tap-aix.c
@@ -0,0 +1,87 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include <stdio.h>
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ error_setg(errp, "no tap on AIX");
+ return -1;
+}
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
+
diff --git a/qemu/net/tap-bsd.c b/qemu/net/tap-bsd.c
new file mode 100644
index 000000000..7028d9be9
--- /dev/null
+++ b/qemu/net/tap-bsd.c
@@ -0,0 +1,227 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include "qemu-common.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net/if_tap.h>
+#endif
+
+#ifndef __FreeBSD__
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ int fd;
+#ifdef TAPGIFNAME
+ struct ifreq ifr;
+#else
+ char *dev;
+ struct stat s;
+#endif
+
+ /* if no ifname is given, always start the search from tap0/tun0. */
+ int i;
+ char dname[100];
+
+ for (i = 0; i < 10; i++) {
+ if (*ifname) {
+ snprintf(dname, sizeof dname, "/dev/%s", ifname);
+ } else {
+#if defined(__OpenBSD__)
+ snprintf(dname, sizeof dname, "/dev/tun%d", i);
+#else
+ snprintf(dname, sizeof dname, "/dev/tap%d", i);
+#endif
+ }
+ TFR(fd = open(dname, O_RDWR));
+ if (fd >= 0) {
+ break;
+ }
+ else if (errno == ENXIO || errno == ENOENT) {
+ break;
+ }
+ if (*ifname) {
+ break;
+ }
+ }
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", dname);
+ return -1;
+ }
+
+#ifdef TAPGIFNAME
+ if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) {
+ error_setg_errno(errp, errno, "could not get tap name");
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+#else
+ if (fstat(fd, &s) < 0) {
+ error_setg_errno(errp, errno, "could not stat %s", dname);
+ return -1;
+ }
+ dev = devname(s.st_rdev, S_IFCHR);
+ pstrcpy(ifname, ifname_size, dev);
+#endif
+
+ if (*vnet_hdr) {
+ /* BSD doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ close(fd);
+ return -1;
+ }
+ }
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+}
+
+#else /* __FreeBSD__ */
+
+#define PATH_NET_TAP "/dev/tap"
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ int fd, s, ret;
+ struct ifreq ifr;
+
+ TFR(fd = open(PATH_NET_TAP, O_RDWR));
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", PATH_NET_TAP);
+ return -1;
+ }
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ ret = ioctl(fd, TAPGIFNAME, (void *)&ifr);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "could not get tap interface name");
+ goto error;
+ }
+
+ if (ifname[0] != '\0') {
+ /* User requested the interface to have a specific name */
+ s = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ if (s < 0) {
+ error_setg_errno(errp, errno,
+ "could not open socket to set interface name");
+ goto error;
+ }
+ ifr.ifr_data = ifname;
+ ret = ioctl(s, SIOCSIFNAME, (void *)&ifr);
+ close(s);
+ if (ret < 0) {
+ error_setg(errp, "could not set tap interface name");
+ goto error;
+ }
+ } else {
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+ }
+
+ if (*vnet_hdr) {
+ /* BSD doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ goto error;
+ }
+ }
+ if (mq_required) {
+ error_setg(errp, "mq_required requested, but no kernel support"
+ " for IFF_MULTI_QUEUE available");
+ goto error;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+
+error:
+ close(fd);
+ return -1;
+}
+#endif /* __FreeBSD__ */
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/qemu/net/tap-haiku.c b/qemu/net/tap-haiku.c
new file mode 100644
index 000000000..2e738ec6a
--- /dev/null
+++ b/qemu/net/tap-haiku.c
@@ -0,0 +1,86 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include <stdio.h>
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ error_setg(errp, "no tap on Haiku");
+ return -1;
+}
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/qemu/net/tap-linux.c b/qemu/net/tap-linux.c
new file mode 100644
index 000000000..394f2a646
--- /dev/null
+++ b/qemu/net/tap-linux.c
@@ -0,0 +1,314 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include "tap-linux.h"
+#include "net/tap.h"
+
+#include <net/if.h>
+#include <sys/ioctl.h>
+
+#include "sysemu/sysemu.h"
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+
+#define PATH_NET_TUN "/dev/net/tun"
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ struct ifreq ifr;
+ int fd, ret;
+ int len = sizeof(struct virtio_net_hdr);
+ unsigned int features;
+
+ TFR(fd = open(PATH_NET_TUN, O_RDWR));
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", PATH_NET_TUN);
+ return -1;
+ }
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+
+ if (ioctl(fd, TUNGETFEATURES, &features) == -1) {
+ error_report("warning: TUNGETFEATURES failed: %s", strerror(errno));
+ features = 0;
+ }
+
+ if (features & IFF_ONE_QUEUE) {
+ ifr.ifr_flags |= IFF_ONE_QUEUE;
+ }
+
+ if (*vnet_hdr) {
+ if (features & IFF_VNET_HDR) {
+ *vnet_hdr = 1;
+ ifr.ifr_flags |= IFF_VNET_HDR;
+ } else {
+ *vnet_hdr = 0;
+ }
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ close(fd);
+ return -1;
+ }
+ /*
+ * Make sure vnet header size has the default value: for a persistent
+ * tap it might have been modified e.g. by another instance of qemu.
+ * Ignore errors since old kernels do not support this ioctl: in this
+ * case the header size implicitly has the correct value.
+ */
+ ioctl(fd, TUNSETVNETHDRSZ, &len);
+ }
+
+ if (mq_required) {
+ if (!(features & IFF_MULTI_QUEUE)) {
+ error_setg(errp, "multiqueue required, but no kernel "
+ "support for IFF_MULTI_QUEUE available");
+ close(fd);
+ return -1;
+ } else {
+ ifr.ifr_flags |= IFF_MULTI_QUEUE;
+ }
+ }
+
+ if (ifname[0] != '\0')
+ pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
+ else
+ pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
+ ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
+ if (ret != 0) {
+ if (ifname[0] != '\0') {
+ error_setg_errno(errp, errno, "could not configure %s (%s)",
+ PATH_NET_TUN, ifr.ifr_name);
+ } else {
+ error_setg_errno(errp, errno, "could not configure %s",
+ PATH_NET_TUN);
+ }
+ close(fd);
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+}
+
+/* sndbuf implements a kind of flow control for tap.
+ * Unfortunately when it's enabled, and packets are sent
+ * to other guests on the same host, the receiver
+ * can lock up the transmitter indefinitely.
+ *
+ * To avoid packet loss, sndbuf should be set to a value lower than the tx
+ * queue capacity of any destination network interface.
+ * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
+ * a good value, given a 1500 byte MTU.
+ */
+#define TAP_DEFAULT_SNDBUF 0
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+ int sndbuf;
+
+ sndbuf = !tap->has_sndbuf ? TAP_DEFAULT_SNDBUF :
+ tap->sndbuf > INT_MAX ? INT_MAX :
+ tap->sndbuf;
+
+ if (!sndbuf) {
+ sndbuf = INT_MAX;
+ }
+
+ if (ioctl(fd, TUNSETSNDBUF, &sndbuf) == -1 && tap->has_sndbuf) {
+ error_setg_errno(errp, errno, "TUNSETSNDBUF ioctl failed");
+ }
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ struct ifreq ifr;
+
+ if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
+ error_report("TUNGETIFF ioctl() failed: %s", strerror(errno));
+ return 0;
+ }
+
+ return ifr.ifr_flags & IFF_VNET_HDR;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ unsigned offload;
+
+ offload = TUN_F_CSUM | TUN_F_UFO;
+
+ if (ioctl(fd, TUNSETOFFLOAD, offload) < 0)
+ return 0;
+
+ return 1;
+}
+
+/* Verify that we can assign given length */
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ int orig;
+ if (ioctl(fd, TUNGETVNETHDRSZ, &orig) == -1) {
+ return 0;
+ }
+ if (ioctl(fd, TUNSETVNETHDRSZ, &len) == -1) {
+ return 0;
+ }
+ /* Restore original length: we can't handle failure. */
+ if (ioctl(fd, TUNSETVNETHDRSZ, &orig) == -1) {
+ fprintf(stderr, "TUNGETVNETHDRSZ ioctl() failed: %s. Exiting.\n",
+ strerror(errno));
+ abort();
+ return -errno;
+ }
+ return 1;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+ if (ioctl(fd, TUNSETVNETHDRSZ, &len) == -1) {
+ fprintf(stderr, "TUNSETVNETHDRSZ ioctl() failed: %s. Exiting.\n",
+ strerror(errno));
+ abort();
+ }
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ int arg = is_le ? 1 : 0;
+
+ if (!ioctl(fd, TUNSETVNETLE, &arg)) {
+ return 0;
+ }
+
+ /* Check if our kernel supports TUNSETVNETLE */
+ if (errno == EINVAL) {
+ return -errno;
+ }
+
+ error_report("TUNSETVNETLE ioctl() failed: %s.\n", strerror(errno));
+ abort();
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ int arg = is_be ? 1 : 0;
+
+ if (!ioctl(fd, TUNSETVNETBE, &arg)) {
+ return 0;
+ }
+
+ /* Check if our kernel supports TUNSETVNETBE */
+ if (errno == EINVAL) {
+ return -errno;
+ }
+
+ error_report("TUNSETVNETBE ioctl() failed: %s.\n", strerror(errno));
+ abort();
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+ unsigned int offload = 0;
+
+ /* Check if our kernel supports TUNSETOFFLOAD */
+ if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {
+ return;
+ }
+
+ if (csum) {
+ offload |= TUN_F_CSUM;
+ if (tso4)
+ offload |= TUN_F_TSO4;
+ if (tso6)
+ offload |= TUN_F_TSO6;
+ if ((tso4 || tso6) && ecn)
+ offload |= TUN_F_TSO_ECN;
+ if (ufo)
+ offload |= TUN_F_UFO;
+ }
+
+ if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+ offload &= ~TUN_F_UFO;
+ if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+ fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
+ strerror(errno));
+ }
+ }
+}
+
+/* Enable a specific queue of tap. */
+int tap_fd_enable(int fd)
+{
+ struct ifreq ifr;
+ int ret;
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ ifr.ifr_flags = IFF_ATTACH_QUEUE;
+ ret = ioctl(fd, TUNSETQUEUE, (void *) &ifr);
+
+ if (ret != 0) {
+ error_report("could not enable queue");
+ }
+
+ return ret;
+}
+
+/* Disable a specific queue of tap/ */
+int tap_fd_disable(int fd)
+{
+ struct ifreq ifr;
+ int ret;
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ ifr.ifr_flags = IFF_DETACH_QUEUE;
+ ret = ioctl(fd, TUNSETQUEUE, (void *) &ifr);
+
+ if (ret != 0) {
+ error_report("could not disable queue");
+ }
+
+ return ret;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ struct ifreq ifr;
+
+ if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
+ error_report("TUNGETIFF ioctl() failed: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ pstrcpy(ifname, sizeof(ifr.ifr_name), ifr.ifr_name);
+ return 0;
+}
diff --git a/qemu/net/tap-linux.h b/qemu/net/tap-linux.h
new file mode 100644
index 000000000..01dc6f8a2
--- /dev/null
+++ b/qemu/net/tap-linux.h
@@ -0,0 +1,54 @@
+/*
+ * Universal TUN/TAP device driver.
+ * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef QEMU_TAP_LINUX_H
+#define QEMU_TAP_LINUX_H
+
+#include <stdint.h>
+#ifdef __linux__
+
+#include <linux/ioctl.h>
+
+/* Ioctl defines */
+#define TUNSETIFF _IOW('T', 202, int)
+#define TUNGETFEATURES _IOR('T', 207, unsigned int)
+#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
+#define TUNGETIFF _IOR('T', 210, unsigned int)
+#define TUNSETSNDBUF _IOW('T', 212, int)
+#define TUNGETVNETHDRSZ _IOR('T', 215, int)
+#define TUNSETVNETHDRSZ _IOW('T', 216, int)
+#define TUNSETQUEUE _IOW('T', 217, int)
+#define TUNSETVNETLE _IOW('T', 220, int)
+#define TUNSETVNETBE _IOW('T', 222, int)
+
+#endif
+
+/* TUNSETIFF ifr flags */
+#define IFF_TAP 0x0002
+#define IFF_NO_PI 0x1000
+#define IFF_ONE_QUEUE 0x2000
+#define IFF_VNET_HDR 0x4000
+#define IFF_MULTI_QUEUE 0x0100
+#define IFF_ATTACH_QUEUE 0x0200
+#define IFF_DETACH_QUEUE 0x0400
+
+/* Features for GSO (TUNSETOFFLOAD). */
+#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
+#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
+#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
+#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
+#define TUN_F_UFO 0x10 /* I can handle UFO packets */
+
+#endif /* QEMU_TAP_H */
diff --git a/qemu/net/tap-solaris.c b/qemu/net/tap-solaris.c
new file mode 100644
index 000000000..0f60f78dd
--- /dev/null
+++ b/qemu/net/tap-solaris.c
@@ -0,0 +1,254 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include "sysemu/sysemu.h"
+
+#include <sys/stat.h>
+#include <sys/ethernet.h>
+#include <sys/sockio.h>
+#include <netinet/arp.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h> // must come after ip.h
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <net/if.h>
+#include <stropts.h>
+#include "qemu/error-report.h"
+
+ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
+{
+ struct strbuf sbuf;
+ int f = 0;
+
+ sbuf.maxlen = maxlen;
+ sbuf.buf = (char *)buf;
+
+ return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
+}
+
+#define TUNNEWPPA (('T'<<16) | 0x0001)
+/*
+ * Allocate TAP device, returns opened fd.
+ * Stores dev name in the first arg(must be large enough).
+ */
+static int tap_alloc(char *dev, size_t dev_size, Error **errp)
+{
+ /* FIXME leaks like a sieve on error paths */
+ /* FIXME suspicious: many errors are reported, then ignored */
+ int tap_fd, if_fd, ppa = -1;
+ static int ip_fd = 0;
+ char *ptr;
+
+ static int arp_fd = 0;
+ int ip_muxid, arp_muxid;
+ struct strioctl strioc_if, strioc_ppa;
+ int link_type = I_PLINK;
+ struct lifreq ifr;
+ char actual_name[32] = "";
+
+ memset(&ifr, 0x0, sizeof(ifr));
+
+ if( *dev ){
+ ptr = dev;
+ while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
+ ppa = atoi(ptr);
+ }
+
+ /* Check if IP device was opened */
+ if( ip_fd )
+ close(ip_fd);
+
+ TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
+ if (ip_fd < 0) {
+ error_setg(errp, "Can't open /dev/ip (actually /dev/udp)");
+ return -1;
+ }
+
+ TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
+ if (tap_fd < 0) {
+ error_setg(errp, "Can't open /dev/tap");
+ return -1;
+ }
+
+ /* Assign a new PPA and get its unit number. */
+ strioc_ppa.ic_cmd = TUNNEWPPA;
+ strioc_ppa.ic_timout = 0;
+ strioc_ppa.ic_len = sizeof(ppa);
+ strioc_ppa.ic_dp = (char *)&ppa;
+ if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
+ error_report("Can't assign new interface");
+
+ TFR(if_fd = open("/dev/tap", O_RDWR, 0));
+ if (if_fd < 0) {
+ error_setg(errp, "Can't open /dev/tap (2)");
+ return -1;
+ }
+ if(ioctl(if_fd, I_PUSH, "ip") < 0){
+ error_setg(errp, "Can't push IP module");
+ return -1;
+ }
+
+ if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
+ error_report("Can't get flags");
+
+ snprintf (actual_name, 32, "tap%d", ppa);
+ pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
+
+ ifr.lifr_ppa = ppa;
+ /* Assign ppa according to the unit number returned by tun device */
+
+ if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
+ error_report("Can't set PPA %d", ppa);
+ if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
+ error_report("Can't get flags");
+ /* Push arp module to if_fd */
+ if (ioctl (if_fd, I_PUSH, "arp") < 0)
+ error_report("Can't push ARP module (2)");
+
+ /* Push arp module to ip_fd */
+ if (ioctl (ip_fd, I_POP, NULL) < 0)
+ error_report("I_POP failed");
+ if (ioctl (ip_fd, I_PUSH, "arp") < 0)
+ error_report("Can't push ARP module (3)");
+ /* Open arp_fd */
+ TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
+ if (arp_fd < 0)
+ error_report("Can't open %s", "/dev/tap");
+
+ /* Set ifname to arp */
+ strioc_if.ic_cmd = SIOCSLIFNAME;
+ strioc_if.ic_timout = 0;
+ strioc_if.ic_len = sizeof(ifr);
+ strioc_if.ic_dp = (char *)&ifr;
+ if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
+ error_report("Can't set ifname to arp");
+ }
+
+ if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
+ error_setg(errp, "Can't link TAP device to IP");
+ return -1;
+ }
+
+ if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
+ error_report("Can't link TAP device to ARP");
+
+ close (if_fd);
+
+ memset(&ifr, 0x0, sizeof(ifr));
+ pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
+ ifr.lifr_ip_muxid = ip_muxid;
+ ifr.lifr_arp_muxid = arp_muxid;
+
+ if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
+ {
+ ioctl (ip_fd, I_PUNLINK , arp_muxid);
+ ioctl (ip_fd, I_PUNLINK, ip_muxid);
+ error_report("Can't set multiplexor id");
+ }
+
+ snprintf(dev, dev_size, "tap%d", ppa);
+ return tap_fd;
+}
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ char dev[10]="";
+ int fd;
+
+ fd = tap_alloc(dev, sizeof(dev), errp);
+ if (fd < 0) {
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, dev);
+ if (*vnet_hdr) {
+ /* Solaris doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ close(fd);
+ return -1;
+ }
+ }
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+}
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/qemu/net/tap-win32.c b/qemu/net/tap-win32.c
new file mode 100644
index 000000000..625d53c64
--- /dev/null
+++ b/qemu/net/tap-win32.c
@@ -0,0 +1,793 @@
+/*
+ * TAP-Win32 -- A kernel driver to provide virtual tap device functionality
+ * on Windows. Originally derived from the CIPE-Win32
+ * project by Damion K. Wilson, with extensive modifications by
+ * James Yonan.
+ *
+ * All source code which derives from the CIPE-Win32 project is
+ * Copyright (C) Damion K. Wilson, 2003, and is released under the
+ * GPL version 2 (see below).
+ *
+ * All other source code is Copyright (C) James Yonan, 2003-2004,
+ * and is released under the GPL version 2 (see below).
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING included with this
+ * distribution); if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tap_int.h"
+
+#include "qemu-common.h"
+#include "clients.h" /* net_init_tap */
+#include "net/net.h"
+#include "net/tap.h" /* tap_has_ufo, ... */
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+#include <stdio.h>
+#include <windows.h>
+#include <winioctl.h>
+
+//=============
+// TAP IOCTLs
+//=============
+
+#define TAP_CONTROL_CODE(request,method) \
+ CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS)
+
+#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE (1, METHOD_BUFFERED)
+#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE (2, METHOD_BUFFERED)
+#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE (3, METHOD_BUFFERED)
+#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE (4, METHOD_BUFFERED)
+#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE (5, METHOD_BUFFERED)
+#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE (6, METHOD_BUFFERED)
+#define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE (7, METHOD_BUFFERED)
+#define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE (8, METHOD_BUFFERED)
+#define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE (9, METHOD_BUFFERED)
+
+//=================
+// Registry keys
+//=================
+
+#define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
+
+#define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
+
+//======================
+// Filesystem prefixes
+//======================
+
+#define USERMODEDEVICEDIR "\\\\.\\Global\\"
+#define TAPSUFFIX ".tap"
+
+
+//======================
+// Compile time configuration
+//======================
+
+//#define DEBUG_TAP_WIN32
+
+#define TUN_ASYNCHRONOUS_WRITES 1
+
+#define TUN_BUFFER_SIZE 1560
+#define TUN_MAX_BUFFER_COUNT 32
+
+/*
+ * The data member "buffer" must be the first element in the tun_buffer
+ * structure. See the function, tap_win32_free_buffer.
+ */
+typedef struct tun_buffer_s {
+ unsigned char buffer [TUN_BUFFER_SIZE];
+ unsigned long read_size;
+ struct tun_buffer_s* next;
+} tun_buffer_t;
+
+typedef struct tap_win32_overlapped {
+ HANDLE handle;
+ HANDLE read_event;
+ HANDLE write_event;
+ HANDLE output_queue_semaphore;
+ HANDLE free_list_semaphore;
+ HANDLE tap_semaphore;
+ CRITICAL_SECTION output_queue_cs;
+ CRITICAL_SECTION free_list_cs;
+ OVERLAPPED read_overlapped;
+ OVERLAPPED write_overlapped;
+ tun_buffer_t buffers[TUN_MAX_BUFFER_COUNT];
+ tun_buffer_t* free_list;
+ tun_buffer_t* output_queue_front;
+ tun_buffer_t* output_queue_back;
+} tap_win32_overlapped_t;
+
+static tap_win32_overlapped_t tap_overlapped;
+
+static tun_buffer_t* get_buffer_from_free_list(tap_win32_overlapped_t* const overlapped)
+{
+ tun_buffer_t* buffer = NULL;
+ WaitForSingleObject(overlapped->free_list_semaphore, INFINITE);
+ EnterCriticalSection(&overlapped->free_list_cs);
+ buffer = overlapped->free_list;
+// assert(buffer != NULL);
+ overlapped->free_list = buffer->next;
+ LeaveCriticalSection(&overlapped->free_list_cs);
+ buffer->next = NULL;
+ return buffer;
+}
+
+static void put_buffer_on_free_list(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer)
+{
+ EnterCriticalSection(&overlapped->free_list_cs);
+ buffer->next = overlapped->free_list;
+ overlapped->free_list = buffer;
+ LeaveCriticalSection(&overlapped->free_list_cs);
+ ReleaseSemaphore(overlapped->free_list_semaphore, 1, NULL);
+}
+
+static tun_buffer_t* get_buffer_from_output_queue(tap_win32_overlapped_t* const overlapped, const int block)
+{
+ tun_buffer_t* buffer = NULL;
+ DWORD result, timeout = block ? INFINITE : 0L;
+
+ // Non-blocking call
+ result = WaitForSingleObject(overlapped->output_queue_semaphore, timeout);
+
+ switch (result)
+ {
+ // The semaphore object was signaled.
+ case WAIT_OBJECT_0:
+ EnterCriticalSection(&overlapped->output_queue_cs);
+
+ buffer = overlapped->output_queue_front;
+ overlapped->output_queue_front = buffer->next;
+
+ if(overlapped->output_queue_front == NULL) {
+ overlapped->output_queue_back = NULL;
+ }
+
+ LeaveCriticalSection(&overlapped->output_queue_cs);
+ break;
+
+ // Semaphore was nonsignaled, so a time-out occurred.
+ case WAIT_TIMEOUT:
+ // Cannot open another window.
+ break;
+ }
+
+ return buffer;
+}
+
+static tun_buffer_t* get_buffer_from_output_queue_immediate (tap_win32_overlapped_t* const overlapped)
+{
+ return get_buffer_from_output_queue(overlapped, 0);
+}
+
+static void put_buffer_on_output_queue(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer)
+{
+ EnterCriticalSection(&overlapped->output_queue_cs);
+
+ if(overlapped->output_queue_front == NULL && overlapped->output_queue_back == NULL) {
+ overlapped->output_queue_front = overlapped->output_queue_back = buffer;
+ } else {
+ buffer->next = NULL;
+ overlapped->output_queue_back->next = buffer;
+ overlapped->output_queue_back = buffer;
+ }
+
+ LeaveCriticalSection(&overlapped->output_queue_cs);
+
+ ReleaseSemaphore(overlapped->output_queue_semaphore, 1, NULL);
+}
+
+
+static int is_tap_win32_dev(const char *guid)
+{
+ HKEY netcard_key;
+ LONG status;
+ DWORD len;
+ int i = 0;
+
+ status = RegOpenKeyEx(
+ HKEY_LOCAL_MACHINE,
+ ADAPTER_KEY,
+ 0,
+ KEY_READ,
+ &netcard_key);
+
+ if (status != ERROR_SUCCESS) {
+ return FALSE;
+ }
+
+ for (;;) {
+ char enum_name[256];
+ char unit_string[256];
+ HKEY unit_key;
+ char component_id_string[] = "ComponentId";
+ char component_id[256];
+ char net_cfg_instance_id_string[] = "NetCfgInstanceId";
+ char net_cfg_instance_id[256];
+ DWORD data_type;
+
+ len = sizeof (enum_name);
+ status = RegEnumKeyEx(
+ netcard_key,
+ i,
+ enum_name,
+ &len,
+ NULL,
+ NULL,
+ NULL,
+ NULL);
+
+ if (status == ERROR_NO_MORE_ITEMS)
+ break;
+ else if (status != ERROR_SUCCESS) {
+ return FALSE;
+ }
+
+ snprintf (unit_string, sizeof(unit_string), "%s\\%s",
+ ADAPTER_KEY, enum_name);
+
+ status = RegOpenKeyEx(
+ HKEY_LOCAL_MACHINE,
+ unit_string,
+ 0,
+ KEY_READ,
+ &unit_key);
+
+ if (status != ERROR_SUCCESS) {
+ return FALSE;
+ } else {
+ len = sizeof (component_id);
+ status = RegQueryValueEx(
+ unit_key,
+ component_id_string,
+ NULL,
+ &data_type,
+ (LPBYTE)component_id,
+ &len);
+
+ if (!(status != ERROR_SUCCESS || data_type != REG_SZ)) {
+ len = sizeof (net_cfg_instance_id);
+ status = RegQueryValueEx(
+ unit_key,
+ net_cfg_instance_id_string,
+ NULL,
+ &data_type,
+ (LPBYTE)net_cfg_instance_id,
+ &len);
+
+ if (status == ERROR_SUCCESS && data_type == REG_SZ) {
+ if (/* !strcmp (component_id, TAP_COMPONENT_ID) &&*/
+ !strcmp (net_cfg_instance_id, guid)) {
+ RegCloseKey (unit_key);
+ RegCloseKey (netcard_key);
+ return TRUE;
+ }
+ }
+ }
+ RegCloseKey (unit_key);
+ }
+ ++i;
+ }
+
+ RegCloseKey (netcard_key);
+ return FALSE;
+}
+
+static int get_device_guid(
+ char *name,
+ int name_size,
+ char *actual_name,
+ int actual_name_size)
+{
+ LONG status;
+ HKEY control_net_key;
+ DWORD len;
+ int i = 0;
+ int stop = 0;
+
+ status = RegOpenKeyEx(
+ HKEY_LOCAL_MACHINE,
+ NETWORK_CONNECTIONS_KEY,
+ 0,
+ KEY_READ,
+ &control_net_key);
+
+ if (status != ERROR_SUCCESS) {
+ return -1;
+ }
+
+ while (!stop)
+ {
+ char enum_name[256];
+ char connection_string[256];
+ HKEY connection_key;
+ char name_data[256];
+ DWORD name_type;
+ const char name_string[] = "Name";
+
+ len = sizeof (enum_name);
+ status = RegEnumKeyEx(
+ control_net_key,
+ i,
+ enum_name,
+ &len,
+ NULL,
+ NULL,
+ NULL,
+ NULL);
+
+ if (status == ERROR_NO_MORE_ITEMS)
+ break;
+ else if (status != ERROR_SUCCESS) {
+ return -1;
+ }
+
+ snprintf(connection_string,
+ sizeof(connection_string),
+ "%s\\%s\\Connection",
+ NETWORK_CONNECTIONS_KEY, enum_name);
+
+ status = RegOpenKeyEx(
+ HKEY_LOCAL_MACHINE,
+ connection_string,
+ 0,
+ KEY_READ,
+ &connection_key);
+
+ if (status == ERROR_SUCCESS) {
+ len = sizeof (name_data);
+ status = RegQueryValueEx(
+ connection_key,
+ name_string,
+ NULL,
+ &name_type,
+ (LPBYTE)name_data,
+ &len);
+
+ if (status != ERROR_SUCCESS || name_type != REG_SZ) {
+ return -1;
+ }
+ else {
+ if (is_tap_win32_dev(enum_name)) {
+ snprintf(name, name_size, "%s", enum_name);
+ if (actual_name) {
+ if (strcmp(actual_name, "") != 0) {
+ if (strcmp(name_data, actual_name) != 0) {
+ RegCloseKey (connection_key);
+ ++i;
+ continue;
+ }
+ }
+ else {
+ snprintf(actual_name, actual_name_size, "%s", name_data);
+ }
+ }
+ stop = 1;
+ }
+ }
+
+ RegCloseKey (connection_key);
+ }
+ ++i;
+ }
+
+ RegCloseKey (control_net_key);
+
+ if (stop == 0)
+ return -1;
+
+ return 0;
+}
+
+static int tap_win32_set_status(HANDLE handle, int status)
+{
+ unsigned long len = 0;
+
+ return DeviceIoControl(handle, TAP_IOCTL_SET_MEDIA_STATUS,
+ &status, sizeof (status),
+ &status, sizeof (status), &len, NULL);
+}
+
+static void tap_win32_overlapped_init(tap_win32_overlapped_t* const overlapped, const HANDLE handle)
+{
+ overlapped->handle = handle;
+
+ overlapped->read_event = CreateEvent(NULL, FALSE, FALSE, NULL);
+ overlapped->write_event = CreateEvent(NULL, FALSE, FALSE, NULL);
+
+ overlapped->read_overlapped.Offset = 0;
+ overlapped->read_overlapped.OffsetHigh = 0;
+ overlapped->read_overlapped.hEvent = overlapped->read_event;
+
+ overlapped->write_overlapped.Offset = 0;
+ overlapped->write_overlapped.OffsetHigh = 0;
+ overlapped->write_overlapped.hEvent = overlapped->write_event;
+
+ InitializeCriticalSection(&overlapped->output_queue_cs);
+ InitializeCriticalSection(&overlapped->free_list_cs);
+
+ overlapped->output_queue_semaphore = CreateSemaphore(
+ NULL, // default security attributes
+ 0, // initial count
+ TUN_MAX_BUFFER_COUNT, // maximum count
+ NULL); // unnamed semaphore
+
+ if(!overlapped->output_queue_semaphore) {
+ fprintf(stderr, "error creating output queue semaphore!\n");
+ }
+
+ overlapped->free_list_semaphore = CreateSemaphore(
+ NULL, // default security attributes
+ TUN_MAX_BUFFER_COUNT, // initial count
+ TUN_MAX_BUFFER_COUNT, // maximum count
+ NULL); // unnamed semaphore
+
+ if(!overlapped->free_list_semaphore) {
+ fprintf(stderr, "error creating free list semaphore!\n");
+ }
+
+ overlapped->free_list = overlapped->output_queue_front = overlapped->output_queue_back = NULL;
+
+ {
+ unsigned index;
+ for(index = 0; index < TUN_MAX_BUFFER_COUNT; index++) {
+ tun_buffer_t* element = &overlapped->buffers[index];
+ element->next = overlapped->free_list;
+ overlapped->free_list = element;
+ }
+ }
+ /* To count buffers, initially no-signal. */
+ overlapped->tap_semaphore = CreateSemaphore(NULL, 0, TUN_MAX_BUFFER_COUNT, NULL);
+ if(!overlapped->tap_semaphore)
+ fprintf(stderr, "error creating tap_semaphore.\n");
+}
+
+static int tap_win32_write(tap_win32_overlapped_t *overlapped,
+ const void *buffer, unsigned long size)
+{
+ unsigned long write_size;
+ BOOL result;
+ DWORD error;
+
+ result = GetOverlappedResult( overlapped->handle, &overlapped->write_overlapped,
+ &write_size, FALSE);
+
+ if (!result && GetLastError() == ERROR_IO_INCOMPLETE)
+ WaitForSingleObject(overlapped->write_event, INFINITE);
+
+ result = WriteFile(overlapped->handle, buffer, size,
+ &write_size, &overlapped->write_overlapped);
+
+ if (!result) {
+ switch (error = GetLastError())
+ {
+ case ERROR_IO_PENDING:
+#ifndef TUN_ASYNCHRONOUS_WRITES
+ WaitForSingleObject(overlapped->write_event, INFINITE);
+#endif
+ break;
+ default:
+ return -1;
+ }
+ }
+
+ return write_size;
+}
+
+static DWORD WINAPI tap_win32_thread_entry(LPVOID param)
+{
+ tap_win32_overlapped_t *overlapped = (tap_win32_overlapped_t*)param;
+ unsigned long read_size;
+ BOOL result;
+ DWORD dwError;
+ tun_buffer_t* buffer = get_buffer_from_free_list(overlapped);
+
+
+ for (;;) {
+ result = ReadFile(overlapped->handle,
+ buffer->buffer,
+ sizeof(buffer->buffer),
+ &read_size,
+ &overlapped->read_overlapped);
+ if (!result) {
+ dwError = GetLastError();
+ if (dwError == ERROR_IO_PENDING) {
+ WaitForSingleObject(overlapped->read_event, INFINITE);
+ result = GetOverlappedResult( overlapped->handle, &overlapped->read_overlapped,
+ &read_size, FALSE);
+ if (!result) {
+#ifdef DEBUG_TAP_WIN32
+ LPVOID lpBuffer;
+ dwError = GetLastError();
+ FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ (LPTSTR) & lpBuffer, 0, NULL );
+ fprintf(stderr, "Tap-Win32: Error GetOverlappedResult %d - %s\n", dwError, lpBuffer);
+ LocalFree( lpBuffer );
+#endif
+ }
+ } else {
+#ifdef DEBUG_TAP_WIN32
+ LPVOID lpBuffer;
+ FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ (LPTSTR) & lpBuffer, 0, NULL );
+ fprintf(stderr, "Tap-Win32: Error ReadFile %d - %s\n", dwError, lpBuffer);
+ LocalFree( lpBuffer );
+#endif
+ }
+ }
+
+ if(read_size > 0) {
+ buffer->read_size = read_size;
+ put_buffer_on_output_queue(overlapped, buffer);
+ ReleaseSemaphore(overlapped->tap_semaphore, 1, NULL);
+ buffer = get_buffer_from_free_list(overlapped);
+ }
+ }
+
+ return 0;
+}
+
+static int tap_win32_read(tap_win32_overlapped_t *overlapped,
+ uint8_t **pbuf, int max_size)
+{
+ int size = 0;
+
+ tun_buffer_t* buffer = get_buffer_from_output_queue_immediate(overlapped);
+
+ if(buffer != NULL) {
+ *pbuf = buffer->buffer;
+ size = (int)buffer->read_size;
+ if(size > max_size) {
+ size = max_size;
+ }
+ }
+
+ return size;
+}
+
+static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped,
+ uint8_t *pbuf)
+{
+ tun_buffer_t* buffer = (tun_buffer_t*)pbuf;
+ put_buffer_on_free_list(overlapped, buffer);
+}
+
+static int tap_win32_open(tap_win32_overlapped_t **phandle,
+ const char *preferred_name)
+{
+ char device_path[256];
+ char device_guid[0x100];
+ int rc;
+ HANDLE handle;
+ BOOL bret;
+ char name_buffer[0x100] = {0, };
+ struct {
+ unsigned long major;
+ unsigned long minor;
+ unsigned long debug;
+ } version;
+ DWORD version_len;
+ DWORD idThread;
+
+ if (preferred_name != NULL) {
+ snprintf(name_buffer, sizeof(name_buffer), "%s", preferred_name);
+ }
+
+ rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer));
+ if (rc)
+ return -1;
+
+ snprintf (device_path, sizeof(device_path), "%s%s%s",
+ USERMODEDEVICEDIR,
+ device_guid,
+ TAPSUFFIX);
+
+ handle = CreateFile (
+ device_path,
+ GENERIC_READ | GENERIC_WRITE,
+ 0,
+ 0,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED,
+ 0 );
+
+ if (handle == INVALID_HANDLE_VALUE) {
+ return -1;
+ }
+
+ bret = DeviceIoControl(handle, TAP_IOCTL_GET_VERSION,
+ &version, sizeof (version),
+ &version, sizeof (version), &version_len, NULL);
+
+ if (bret == FALSE) {
+ CloseHandle(handle);
+ return -1;
+ }
+
+ if (!tap_win32_set_status(handle, TRUE)) {
+ return -1;
+ }
+
+ tap_win32_overlapped_init(&tap_overlapped, handle);
+
+ *phandle = &tap_overlapped;
+
+ CreateThread(NULL, 0, tap_win32_thread_entry,
+ (LPVOID)&tap_overlapped, 0, &idThread);
+ return 0;
+}
+
+/********************************************/
+
+ typedef struct TAPState {
+ NetClientState nc;
+ tap_win32_overlapped_t *handle;
+ } TAPState;
+
+static void tap_cleanup(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ qemu_del_wait_object(s->handle->tap_semaphore, NULL, NULL);
+
+ /* FIXME: need to kill thread and close file handle:
+ tap_win32_close(s);
+ */
+}
+
+static ssize_t tap_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ return tap_win32_write(s->handle, buf, size);
+}
+
+static void tap_win32_send(void *opaque)
+{
+ TAPState *s = opaque;
+ uint8_t *buf;
+ int max_size = 4096;
+ int size;
+
+ size = tap_win32_read(s->handle, &buf, max_size);
+ if (size > 0) {
+ qemu_send_packet(&s->nc, buf, size);
+ tap_win32_free_buffer(s->handle, buf);
+ }
+}
+
+static bool tap_has_ufo(NetClientState *nc)
+{
+ return false;
+}
+
+static bool tap_has_vnet_hdr(NetClientState *nc)
+{
+ return false;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+static void tap_using_vnet_hdr(NetClientState *nc, bool using_vnet_hdr)
+{
+}
+
+static void tap_set_offload(NetClientState *nc, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+struct vhost_net *tap_get_vhost_net(NetClientState *nc)
+{
+ return NULL;
+}
+
+static bool tap_has_vnet_hdr_len(NetClientState *nc, int len)
+{
+ return false;
+}
+
+static void tap_set_vnet_hdr_len(NetClientState *nc, int len)
+{
+ abort();
+}
+
+static NetClientInfo net_tap_win32_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_TAP,
+ .size = sizeof(TAPState),
+ .receive = tap_receive,
+ .cleanup = tap_cleanup,
+ .has_ufo = tap_has_ufo,
+ .has_vnet_hdr = tap_has_vnet_hdr,
+ .has_vnet_hdr_len = tap_has_vnet_hdr_len,
+ .using_vnet_hdr = tap_using_vnet_hdr,
+ .set_offload = tap_set_offload,
+ .set_vnet_hdr_len = tap_set_vnet_hdr_len,
+};
+
+static int tap_win32_init(NetClientState *peer, const char *model,
+ const char *name, const char *ifname)
+{
+ NetClientState *nc;
+ TAPState *s;
+ tap_win32_overlapped_t *handle;
+
+ if (tap_win32_open(&handle, ifname) < 0) {
+ printf("tap: Could not open '%s'\n", ifname);
+ return -1;
+ }
+
+ nc = qemu_new_net_client(&net_tap_win32_info, peer, model, name);
+
+ s = DO_UPCAST(TAPState, nc, nc);
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "tap: ifname=%s", ifname);
+
+ s->handle = handle;
+
+ qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s);
+
+ return 0;
+}
+
+int net_init_tap(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ const NetdevTapOptions *tap;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
+ tap = opts->tap;
+
+ if (!tap->has_ifname) {
+ error_report("tap: no interface name");
+ return -1;
+ }
+
+ if (tap_win32_init(peer, "tap", name, tap->ifname) == -1) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int tap_enable(NetClientState *nc)
+{
+ abort();
+}
+
+int tap_disable(NetClientState *nc)
+{
+ abort();
+}
diff --git a/qemu/net/tap.c b/qemu/net/tap.c
new file mode 100644
index 000000000..bd01590e8
--- /dev/null
+++ b/qemu/net/tap.c
@@ -0,0 +1,930 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+
+#include "config-host.h"
+
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include "net/net.h"
+#include "clients.h"
+#include "monitor/monitor.h"
+#include "sysemu/sysemu.h"
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+
+#include "net/tap.h"
+
+#include "net/vhost_net.h"
+
+typedef struct TAPState {
+ NetClientState nc;
+ int fd;
+ char down_script[1024];
+ char down_script_arg[128];
+ uint8_t buf[NET_BUFSIZE];
+ bool read_poll;
+ bool write_poll;
+ bool using_vnet_hdr;
+ bool has_ufo;
+ bool enabled;
+ VHostNetState *vhost_net;
+ unsigned host_vnet_hdr_len;
+} TAPState;
+
+static void launch_script(const char *setup_script, const char *ifname,
+ int fd, Error **errp);
+
+static void tap_send(void *opaque);
+static void tap_writable(void *opaque);
+
+static void tap_update_fd_handler(TAPState *s)
+{
+ qemu_set_fd_handler(s->fd,
+ s->read_poll && s->enabled ? tap_send : NULL,
+ s->write_poll && s->enabled ? tap_writable : NULL,
+ s);
+}
+
+static void tap_read_poll(TAPState *s, bool enable)
+{
+ s->read_poll = enable;
+ tap_update_fd_handler(s);
+}
+
+static void tap_write_poll(TAPState *s, bool enable)
+{
+ s->write_poll = enable;
+ tap_update_fd_handler(s);
+}
+
+static void tap_writable(void *opaque)
+{
+ TAPState *s = opaque;
+
+ tap_write_poll(s, false);
+
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t tap_write_packet(TAPState *s, const struct iovec *iov, int iovcnt)
+{
+ ssize_t len;
+
+ do {
+ len = writev(s->fd, iov, iovcnt);
+ } while (len == -1 && errno == EINTR);
+
+ if (len == -1 && errno == EAGAIN) {
+ tap_write_poll(s, true);
+ return 0;
+ }
+
+ return len;
+}
+
+static ssize_t tap_receive_iov(NetClientState *nc, const struct iovec *iov,
+ int iovcnt)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ const struct iovec *iovp = iov;
+ struct iovec iov_copy[iovcnt + 1];
+ struct virtio_net_hdr_mrg_rxbuf hdr = { };
+
+ if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
+ iov_copy[0].iov_base = &hdr;
+ iov_copy[0].iov_len = s->host_vnet_hdr_len;
+ memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov));
+ iovp = iov_copy;
+ iovcnt++;
+ }
+
+ return tap_write_packet(s, iovp, iovcnt);
+}
+
+static ssize_t tap_receive_raw(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ struct iovec iov[2];
+ int iovcnt = 0;
+ struct virtio_net_hdr_mrg_rxbuf hdr = { };
+
+ if (s->host_vnet_hdr_len) {
+ iov[iovcnt].iov_base = &hdr;
+ iov[iovcnt].iov_len = s->host_vnet_hdr_len;
+ iovcnt++;
+ }
+
+ iov[iovcnt].iov_base = (char *)buf;
+ iov[iovcnt].iov_len = size;
+ iovcnt++;
+
+ return tap_write_packet(s, iov, iovcnt);
+}
+
+static ssize_t tap_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ struct iovec iov[1];
+
+ if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
+ return tap_receive_raw(nc, buf, size);
+ }
+
+ iov[0].iov_base = (char *)buf;
+ iov[0].iov_len = size;
+
+ return tap_write_packet(s, iov, 1);
+}
+
+#ifndef __sun__
+ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
+{
+ return read(tapfd, buf, maxlen);
+}
+#endif
+
+static void tap_send_completed(NetClientState *nc, ssize_t len)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ tap_read_poll(s, true);
+}
+
+static void tap_send(void *opaque)
+{
+ TAPState *s = opaque;
+ int size;
+ int packets = 0;
+
+ while (true) {
+ uint8_t *buf = s->buf;
+
+ size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
+ if (size <= 0) {
+ break;
+ }
+
+ if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
+ buf += s->host_vnet_hdr_len;
+ size -= s->host_vnet_hdr_len;
+ }
+
+ size = qemu_send_packet_async(&s->nc, buf, size, tap_send_completed);
+ if (size == 0) {
+ tap_read_poll(s, false);
+ break;
+ } else if (size < 0) {
+ break;
+ }
+
+ /*
+ * When the host keeps receiving more packets while tap_send() is
+ * running we can hog the QEMU global mutex. Limit the number of
+ * packets that are processed per tap_send() callback to prevent
+ * stalling the guest.
+ */
+ packets++;
+ if (packets >= 50) {
+ break;
+ }
+ }
+}
+
+static bool tap_has_ufo(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+
+ return s->has_ufo;
+}
+
+static bool tap_has_vnet_hdr(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+
+ return !!s->host_vnet_hdr_len;
+}
+
+static bool tap_has_vnet_hdr_len(NetClientState *nc, int len)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+
+ return !!tap_probe_vnet_hdr_len(s->fd, len);
+}
+
+static void tap_set_vnet_hdr_len(NetClientState *nc, int len)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) ||
+ len == sizeof(struct virtio_net_hdr));
+
+ tap_fd_set_vnet_hdr_len(s->fd, len);
+ s->host_vnet_hdr_len = len;
+}
+
+static void tap_using_vnet_hdr(NetClientState *nc, bool using_vnet_hdr)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(!!s->host_vnet_hdr_len == using_vnet_hdr);
+
+ s->using_vnet_hdr = using_vnet_hdr;
+}
+
+static int tap_set_vnet_le(NetClientState *nc, bool is_le)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ return tap_fd_set_vnet_le(s->fd, is_le);
+}
+
+static int tap_set_vnet_be(NetClientState *nc, bool is_be)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+
+ return tap_fd_set_vnet_be(s->fd, is_be);
+}
+
+static void tap_set_offload(NetClientState *nc, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ if (s->fd < 0) {
+ return;
+ }
+
+ tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo);
+}
+
+static void tap_cleanup(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ Error *err = NULL;
+
+ if (s->vhost_net) {
+ vhost_net_cleanup(s->vhost_net);
+ s->vhost_net = NULL;
+ }
+
+ qemu_purge_queued_packets(nc);
+
+ if (s->down_script[0]) {
+ launch_script(s->down_script, s->down_script_arg, s->fd, &err);
+ if (err) {
+ error_report_err(err);
+ }
+ }
+
+ tap_read_poll(s, false);
+ tap_write_poll(s, false);
+ close(s->fd);
+ s->fd = -1;
+}
+
+static void tap_poll(NetClientState *nc, bool enable)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ tap_read_poll(s, enable);
+ tap_write_poll(s, enable);
+}
+
+int tap_get_fd(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ return s->fd;
+}
+
+/* fd support */
+
+static NetClientInfo net_tap_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_TAP,
+ .size = sizeof(TAPState),
+ .receive = tap_receive,
+ .receive_raw = tap_receive_raw,
+ .receive_iov = tap_receive_iov,
+ .poll = tap_poll,
+ .cleanup = tap_cleanup,
+ .has_ufo = tap_has_ufo,
+ .has_vnet_hdr = tap_has_vnet_hdr,
+ .has_vnet_hdr_len = tap_has_vnet_hdr_len,
+ .using_vnet_hdr = tap_using_vnet_hdr,
+ .set_offload = tap_set_offload,
+ .set_vnet_hdr_len = tap_set_vnet_hdr_len,
+ .set_vnet_le = tap_set_vnet_le,
+ .set_vnet_be = tap_set_vnet_be,
+};
+
+static TAPState *net_tap_fd_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ int fd,
+ int vnet_hdr)
+{
+ NetClientState *nc;
+ TAPState *s;
+
+ nc = qemu_new_net_client(&net_tap_info, peer, model, name);
+
+ s = DO_UPCAST(TAPState, nc, nc);
+
+ s->fd = fd;
+ s->host_vnet_hdr_len = vnet_hdr ? sizeof(struct virtio_net_hdr) : 0;
+ s->using_vnet_hdr = false;
+ s->has_ufo = tap_probe_has_ufo(s->fd);
+ s->enabled = true;
+ tap_set_offload(&s->nc, 0, 0, 0, 0, 0);
+ /*
+ * Make sure host header length is set correctly in tap:
+ * it might have been modified by another instance of qemu.
+ */
+ if (tap_probe_vnet_hdr_len(s->fd, s->host_vnet_hdr_len)) {
+ tap_fd_set_vnet_hdr_len(s->fd, s->host_vnet_hdr_len);
+ }
+ tap_read_poll(s, true);
+ s->vhost_net = NULL;
+ return s;
+}
+
+static void launch_script(const char *setup_script, const char *ifname,
+ int fd, Error **errp)
+{
+ int pid, status;
+ char *args[3];
+ char **parg;
+
+ /* try to launch network script */
+ pid = fork();
+ if (pid < 0) {
+ error_setg_errno(errp, errno, "could not launch network script %s",
+ setup_script);
+ return;
+ }
+ if (pid == 0) {
+ int open_max = sysconf(_SC_OPEN_MAX), i;
+
+ for (i = 3; i < open_max; i++) {
+ if (i != fd) {
+ close(i);
+ }
+ }
+ parg = args;
+ *parg++ = (char *)setup_script;
+ *parg++ = (char *)ifname;
+ *parg = NULL;
+ execv(setup_script, args);
+ _exit(1);
+ } else {
+ while (waitpid(pid, &status, 0) != pid) {
+ /* loop */
+ }
+
+ if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+ return;
+ }
+ error_setg(errp, "network script %s failed with status %d",
+ setup_script, status);
+ }
+}
+
+static int recv_fd(int c)
+{
+ int fd;
+ uint8_t msgbuf[CMSG_SPACE(sizeof(fd))];
+ struct msghdr msg = {
+ .msg_control = msgbuf,
+ .msg_controllen = sizeof(msgbuf),
+ };
+ struct cmsghdr *cmsg;
+ struct iovec iov;
+ uint8_t req[1];
+ ssize_t len;
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
+ msg.msg_controllen = cmsg->cmsg_len;
+
+ iov.iov_base = req;
+ iov.iov_len = sizeof(req);
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ len = recvmsg(c, &msg, 0);
+ if (len > 0) {
+ memcpy(&fd, CMSG_DATA(cmsg), sizeof(fd));
+ return fd;
+ }
+
+ return len;
+}
+
+static int net_bridge_run_helper(const char *helper, const char *bridge,
+ Error **errp)
+{
+ sigset_t oldmask, mask;
+ int pid, status;
+ char *args[5];
+ char **parg;
+ int sv[2];
+
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGCHLD);
+ sigprocmask(SIG_BLOCK, &mask, &oldmask);
+
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
+ error_setg_errno(errp, errno, "socketpair() failed");
+ return -1;
+ }
+
+ /* try to launch bridge helper */
+ pid = fork();
+ if (pid < 0) {
+ error_setg_errno(errp, errno, "Can't fork bridge helper");
+ return -1;
+ }
+ if (pid == 0) {
+ int open_max = sysconf(_SC_OPEN_MAX), i;
+ char fd_buf[6+10];
+ char br_buf[6+IFNAMSIZ] = {0};
+ char helper_cmd[PATH_MAX + sizeof(fd_buf) + sizeof(br_buf) + 15];
+
+ for (i = 3; i < open_max; i++) {
+ if (i != sv[1]) {
+ close(i);
+ }
+ }
+
+ snprintf(fd_buf, sizeof(fd_buf), "%s%d", "--fd=", sv[1]);
+
+ if (strrchr(helper, ' ') || strrchr(helper, '\t')) {
+ /* assume helper is a command */
+
+ if (strstr(helper, "--br=") == NULL) {
+ snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge);
+ }
+
+ snprintf(helper_cmd, sizeof(helper_cmd), "%s %s %s %s",
+ helper, "--use-vnet", fd_buf, br_buf);
+
+ parg = args;
+ *parg++ = (char *)"sh";
+ *parg++ = (char *)"-c";
+ *parg++ = helper_cmd;
+ *parg++ = NULL;
+
+ execv("/bin/sh", args);
+ } else {
+ /* assume helper is just the executable path name */
+
+ snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge);
+
+ parg = args;
+ *parg++ = (char *)helper;
+ *parg++ = (char *)"--use-vnet";
+ *parg++ = fd_buf;
+ *parg++ = br_buf;
+ *parg++ = NULL;
+
+ execv(helper, args);
+ }
+ _exit(1);
+
+ } else {
+ int fd;
+ int saved_errno;
+
+ close(sv[1]);
+
+ do {
+ fd = recv_fd(sv[0]);
+ } while (fd == -1 && errno == EINTR);
+ saved_errno = errno;
+
+ close(sv[0]);
+
+ while (waitpid(pid, &status, 0) != pid) {
+ /* loop */
+ }
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ if (fd < 0) {
+ error_setg_errno(errp, saved_errno,
+ "failed to recv file descriptor");
+ return -1;
+ }
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ error_setg(errp, "bridge helper failed");
+ return -1;
+ }
+ return fd;
+ }
+}
+
+int net_init_bridge(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevBridgeOptions *bridge;
+ const char *helper, *br;
+ TAPState *s;
+ int fd, vnet_hdr;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_BRIDGE);
+ bridge = opts->bridge;
+
+ helper = bridge->has_helper ? bridge->helper : DEFAULT_BRIDGE_HELPER;
+ br = bridge->has_br ? bridge->br : DEFAULT_BRIDGE_INTERFACE;
+
+ fd = net_bridge_run_helper(helper, br, errp);
+ if (fd == -1) {
+ return -1;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ vnet_hdr = tap_probe_vnet_hdr(fd);
+ s = net_tap_fd_init(peer, "bridge", name, fd, vnet_hdr);
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s,br=%s", helper,
+ br);
+
+ return 0;
+}
+
+static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr,
+ const char *setup_script, char *ifname,
+ size_t ifname_sz, int mq_required, Error **errp)
+{
+ Error *err = NULL;
+ int fd, vnet_hdr_required;
+
+ if (tap->has_vnet_hdr) {
+ *vnet_hdr = tap->vnet_hdr;
+ vnet_hdr_required = *vnet_hdr;
+ } else {
+ *vnet_hdr = 1;
+ vnet_hdr_required = 0;
+ }
+
+ TFR(fd = tap_open(ifname, ifname_sz, vnet_hdr, vnet_hdr_required,
+ mq_required, errp));
+ if (fd < 0) {
+ return -1;
+ }
+
+ if (setup_script &&
+ setup_script[0] != '\0' &&
+ strcmp(setup_script, "no") != 0) {
+ launch_script(setup_script, ifname, fd, &err);
+ if (err) {
+ error_propagate(errp, err);
+ close(fd);
+ return -1;
+ }
+ }
+
+ return fd;
+}
+
+#define MAX_TAP_QUEUES 1024
+
+static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
+ const char *model, const char *name,
+ const char *ifname, const char *script,
+ const char *downscript, const char *vhostfdname,
+ int vnet_hdr, int fd, Error **errp)
+{
+ Error *err = NULL;
+ TAPState *s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
+ int vhostfd;
+
+ tap_set_sndbuf(s->fd, tap, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ if (tap->has_fd || tap->has_fds) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
+ } else if (tap->has_helper) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s",
+ tap->helper);
+ } else {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "ifname=%s,script=%s,downscript=%s", ifname, script,
+ downscript);
+
+ if (strcmp(downscript, "no") != 0) {
+ snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
+ snprintf(s->down_script_arg, sizeof(s->down_script_arg),
+ "%s", ifname);
+ }
+ }
+
+ if (tap->has_vhost ? tap->vhost :
+ vhostfdname || (tap->has_vhostforce && tap->vhostforce)) {
+ VhostNetOptions options;
+
+ options.backend_type = VHOST_BACKEND_TYPE_KERNEL;
+ options.net_backend = &s->nc;
+
+ if (tap->has_vhostfd || tap->has_vhostfds) {
+ vhostfd = monitor_fd_param(cur_mon, vhostfdname, &err);
+ if (vhostfd == -1) {
+ error_propagate(errp, err);
+ return;
+ }
+ } else {
+ vhostfd = open("/dev/vhost-net", O_RDWR);
+ if (vhostfd < 0) {
+ error_setg_errno(errp, errno,
+ "tap: open vhost char device failed");
+ return;
+ }
+ }
+ options.opaque = (void *)(uintptr_t)vhostfd;
+
+ s->vhost_net = vhost_net_init(&options);
+ if (!s->vhost_net) {
+ error_setg(errp,
+ "vhost-net requested but could not be initialized");
+ return;
+ }
+ } else if (tap->has_vhostfd || tap->has_vhostfds) {
+ error_setg(errp, "vhostfd= is not valid without vhost");
+ }
+}
+
+static int get_fds(char *str, char *fds[], int max)
+{
+ char *ptr = str, *this;
+ size_t len = strlen(str);
+ int i = 0;
+
+ while (i < max && ptr < str + len) {
+ this = strchr(ptr, ':');
+
+ if (this == NULL) {
+ fds[i] = g_strdup(ptr);
+ } else {
+ fds[i] = g_strndup(ptr, this - ptr);
+ }
+
+ i++;
+ if (this == NULL) {
+ break;
+ } else {
+ ptr = this + 1;
+ }
+ }
+
+ return i;
+}
+
+int net_init_tap(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevTapOptions *tap;
+ int fd, vnet_hdr = 0, i = 0, queues;
+ /* for the no-fd, no-helper case */
+ const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
+ const char *downscript = NULL;
+ Error *err = NULL;
+ const char *vhostfdname;
+ char ifname[128];
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
+ tap = opts->tap;
+ queues = tap->has_queues ? tap->queues : 1;
+ vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;
+
+ /* QEMU vlans does not support multiqueue tap, in this case peer is set.
+ * For -netdev, peer is always NULL. */
+ if (peer && (tap->has_queues || tap->has_fds || tap->has_vhostfds)) {
+ error_setg(errp, "Multiqueue tap cannot be used with QEMU vlans");
+ return -1;
+ }
+
+ if (tap->has_fd) {
+ if (tap->has_ifname || tap->has_script || tap->has_downscript ||
+ tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
+ tap->has_fds || tap->has_vhostfds) {
+ error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
+ "helper=, queues=, fds=, and vhostfds= "
+ "are invalid with fd=");
+ return -1;
+ }
+
+ fd = monitor_fd_param(cur_mon, tap->fd, &err);
+ if (fd == -1) {
+ error_propagate(errp, err);
+ return -1;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+
+ vnet_hdr = tap_probe_vnet_hdr(fd);
+
+ net_init_tap_one(tap, peer, "tap", name, NULL,
+ script, downscript,
+ vhostfdname, vnet_hdr, fd, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return -1;
+ }
+ } else if (tap->has_fds) {
+ char *fds[MAX_TAP_QUEUES];
+ char *vhost_fds[MAX_TAP_QUEUES];
+ int nfds, nvhosts;
+
+ if (tap->has_ifname || tap->has_script || tap->has_downscript ||
+ tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
+ tap->has_vhostfd) {
+ error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
+ "helper=, queues=, and vhostfd= "
+ "are invalid with fds=");
+ return -1;
+ }
+
+ nfds = get_fds(tap->fds, fds, MAX_TAP_QUEUES);
+ if (tap->has_vhostfds) {
+ nvhosts = get_fds(tap->vhostfds, vhost_fds, MAX_TAP_QUEUES);
+ if (nfds != nvhosts) {
+ error_setg(errp, "The number of fds passed does not match "
+ "the number of vhostfds passed");
+ return -1;
+ }
+ }
+
+ for (i = 0; i < nfds; i++) {
+ fd = monitor_fd_param(cur_mon, fds[i], &err);
+ if (fd == -1) {
+ error_propagate(errp, err);
+ return -1;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+
+ if (i == 0) {
+ vnet_hdr = tap_probe_vnet_hdr(fd);
+ } else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
+ error_setg(errp,
+ "vnet_hdr not consistent across given tap fds");
+ return -1;
+ }
+
+ net_init_tap_one(tap, peer, "tap", name, ifname,
+ script, downscript,
+ tap->has_vhostfds ? vhost_fds[i] : NULL,
+ vnet_hdr, fd, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return -1;
+ }
+ }
+ } else if (tap->has_helper) {
+ if (tap->has_ifname || tap->has_script || tap->has_downscript ||
+ tap->has_vnet_hdr || tap->has_queues || tap->has_vhostfds) {
+ error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
+ "queues=, and vhostfds= are invalid with helper=");
+ return -1;
+ }
+
+ fd = net_bridge_run_helper(tap->helper, DEFAULT_BRIDGE_INTERFACE,
+ errp);
+ if (fd == -1) {
+ return -1;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ vnet_hdr = tap_probe_vnet_hdr(fd);
+
+ net_init_tap_one(tap, peer, "bridge", name, ifname,
+ script, downscript, vhostfdname,
+ vnet_hdr, fd, &err);
+ if (err) {
+ error_propagate(errp, err);
+ close(fd);
+ return -1;
+ }
+ } else {
+ if (tap->has_vhostfds) {
+ error_setg(errp, "vhostfds= is invalid if fds= wasn't specified");
+ return -1;
+ }
+ script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT;
+ downscript = tap->has_downscript ? tap->downscript :
+ DEFAULT_NETWORK_DOWN_SCRIPT;
+
+ if (tap->has_ifname) {
+ pstrcpy(ifname, sizeof ifname, tap->ifname);
+ } else {
+ ifname[0] = '\0';
+ }
+
+ for (i = 0; i < queues; i++) {
+ fd = net_tap_init(tap, &vnet_hdr, i >= 1 ? "no" : script,
+ ifname, sizeof ifname, queues > 1, errp);
+ if (fd == -1) {
+ return -1;
+ }
+
+ if (queues > 1 && i == 0 && !tap->has_ifname) {
+ if (tap_fd_get_ifname(fd, ifname)) {
+ error_setg(errp, "Fail to get ifname");
+ close(fd);
+ return -1;
+ }
+ }
+
+ net_init_tap_one(tap, peer, "tap", name, ifname,
+ i >= 1 ? "no" : script,
+ i >= 1 ? "no" : downscript,
+ vhostfdname, vnet_hdr, fd, &err);
+ if (err) {
+ error_propagate(errp, err);
+ close(fd);
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+VHostNetState *tap_get_vhost_net(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ return s->vhost_net;
+}
+
+int tap_enable(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ int ret;
+
+ if (s->enabled) {
+ return 0;
+ } else {
+ ret = tap_fd_enable(s->fd);
+ if (ret == 0) {
+ s->enabled = true;
+ tap_update_fd_handler(s);
+ }
+ return ret;
+ }
+}
+
+int tap_disable(NetClientState *nc)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ int ret;
+
+ if (s->enabled == 0) {
+ return 0;
+ } else {
+ ret = tap_fd_disable(s->fd);
+ if (ret == 0) {
+ qemu_purge_queued_packets(nc);
+ s->enabled = false;
+ tap_update_fd_handler(s);
+ }
+ return ret;
+ }
+}
diff --git a/qemu/net/tap_int.h b/qemu/net/tap_int.h
new file mode 100644
index 000000000..2378021c4
--- /dev/null
+++ b/qemu/net/tap_int.h
@@ -0,0 +1,49 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef QEMU_TAP_H
+#define QEMU_TAP_H
+
+#include "qemu-common.h"
+#include "qapi-types.h"
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp);
+
+ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen);
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp);
+int tap_probe_vnet_hdr(int fd);
+int tap_probe_vnet_hdr_len(int fd, int len);
+int tap_probe_has_ufo(int fd);
+void tap_fd_set_offload(int fd, int csum, int tso4, int tso6, int ecn, int ufo);
+void tap_fd_set_vnet_hdr_len(int fd, int len);
+int tap_fd_set_vnet_le(int fd, int vnet_is_le);
+int tap_fd_set_vnet_be(int fd, int vnet_is_be);
+int tap_fd_enable(int fd);
+int tap_fd_disable(int fd);
+int tap_fd_get_ifname(int fd, char *ifname);
+
+#endif /* QEMU_TAP_H */
diff --git a/qemu/net/util.c b/qemu/net/util.c
new file mode 100644
index 000000000..7e9507679
--- /dev/null
+++ b/qemu/net/util.c
@@ -0,0 +1,60 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "util.h"
+#include <errno.h>
+#include <stdlib.h>
+
+int net_parse_macaddr(uint8_t *macaddr, const char *p)
+{
+ int i;
+ char *last_char;
+ long int offset;
+
+ errno = 0;
+ offset = strtol(p, &last_char, 0);
+ if (errno == 0 && *last_char == '\0' &&
+ offset >= 0 && offset <= 0xFFFFFF) {
+ macaddr[3] = (offset & 0xFF0000) >> 16;
+ macaddr[4] = (offset & 0xFF00) >> 8;
+ macaddr[5] = offset & 0xFF;
+ return 0;
+ }
+
+ for (i = 0; i < 6; i++) {
+ macaddr[i] = strtol(p, (char **)&p, 16);
+ if (i == 5) {
+ if (*p != '\0') {
+ return -1;
+ }
+ } else {
+ if (*p != ':' && *p != '-') {
+ return -1;
+ }
+ p++;
+ }
+ }
+
+ return 0;
+}
diff --git a/qemu/net/util.h b/qemu/net/util.h
new file mode 100644
index 000000000..10c7da95f
--- /dev/null
+++ b/qemu/net/util.h
@@ -0,0 +1,32 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef QEMU_NET_UTIL_H
+#define QEMU_NET_UTIL_H
+
+#include <stdint.h>
+
+int net_parse_macaddr(uint8_t *macaddr, const char *p);
+
+#endif /* QEMU_NET_UTIL_H */
diff --git a/qemu/net/vde.c b/qemu/net/vde.c
new file mode 100644
index 000000000..dacaa64b4
--- /dev/null
+++ b/qemu/net/vde.c
@@ -0,0 +1,128 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "config-host.h"
+
+#include <libvdeplug.h>
+
+#include "net/net.h"
+#include "clients.h"
+#include "qemu-common.h"
+#include "qemu/option.h"
+#include "qemu/main-loop.h"
+
+typedef struct VDEState {
+ NetClientState nc;
+ VDECONN *vde;
+} VDEState;
+
+static void vde_to_qemu(void *opaque)
+{
+ VDEState *s = opaque;
+ uint8_t buf[NET_BUFSIZE];
+ int size;
+
+ size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
+ if (size > 0) {
+ qemu_send_packet(&s->nc, buf, size);
+ }
+}
+
+static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ VDEState *s = DO_UPCAST(VDEState, nc, nc);
+ ssize_t ret;
+
+ do {
+ ret = vde_send(s->vde, (const char *)buf, size, 0);
+ } while (ret < 0 && errno == EINTR);
+
+ return ret;
+}
+
+static void vde_cleanup(NetClientState *nc)
+{
+ VDEState *s = DO_UPCAST(VDEState, nc, nc);
+ qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
+ vde_close(s->vde);
+}
+
+static NetClientInfo net_vde_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_VDE,
+ .size = sizeof(VDEState),
+ .receive = vde_receive,
+ .cleanup = vde_cleanup,
+};
+
+static int net_vde_init(NetClientState *peer, const char *model,
+ const char *name, const char *sock,
+ int port, const char *group, int mode)
+{
+ NetClientState *nc;
+ VDEState *s;
+ VDECONN *vde;
+ char *init_group = (char *)group;
+ char *init_sock = (char *)sock;
+
+ struct vde_open_args args = {
+ .port = port,
+ .group = init_group,
+ .mode = mode,
+ };
+
+ vde = vde_open(init_sock, (char *)"QEMU", &args);
+ if (!vde){
+ return -1;
+ }
+
+ nc = qemu_new_net_client(&net_vde_info, peer, model, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
+ sock, vde_datafd(vde));
+
+ s = DO_UPCAST(VDEState, nc, nc);
+
+ s->vde = vde;
+
+ qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
+
+ return 0;
+}
+
+int net_init_vde(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ /* FIXME error_setg(errp, ...) on failure */
+ const NetdevVdeOptions *vde;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VDE);
+ vde = opts->vde;
+
+ /* missing optional values have been initialized to "all bits zero" */
+ if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
+ vde->has_mode ? vde->mode : 0700) == -1) {
+ return -1;
+ }
+
+ return 0;
+}
diff --git a/qemu/net/vhost-user.c b/qemu/net/vhost-user.c
new file mode 100644
index 000000000..93dcecd66
--- /dev/null
+++ b/qemu/net/vhost-user.c
@@ -0,0 +1,248 @@
+/*
+ * vhost-user.c
+ *
+ * Copyright (c) 2013 Virtual Open Systems Sarl.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "clients.h"
+#include "net/vhost_net.h"
+#include "net/vhost-user.h"
+#include "sysemu/char.h"
+#include "qemu/config-file.h"
+#include "qemu/error-report.h"
+
+typedef struct VhostUserState {
+ NetClientState nc;
+ CharDriverState *chr;
+ VHostNetState *vhost_net;
+} VhostUserState;
+
+typedef struct VhostUserChardevProps {
+ bool is_socket;
+ bool is_unix;
+ bool is_server;
+} VhostUserChardevProps;
+
+VHostNetState *vhost_user_get_vhost_net(NetClientState *nc)
+{
+ VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+ return s->vhost_net;
+}
+
+static int vhost_user_running(VhostUserState *s)
+{
+ return (s->vhost_net) ? 1 : 0;
+}
+
+static int vhost_user_start(VhostUserState *s)
+{
+ VhostNetOptions options;
+
+ if (vhost_user_running(s)) {
+ return 0;
+ }
+
+ options.backend_type = VHOST_BACKEND_TYPE_USER;
+ options.net_backend = &s->nc;
+ options.opaque = s->chr;
+
+ s->vhost_net = vhost_net_init(&options);
+
+ return vhost_user_running(s) ? 0 : -1;
+}
+
+static void vhost_user_stop(VhostUserState *s)
+{
+ if (vhost_user_running(s)) {
+ vhost_net_cleanup(s->vhost_net);
+ }
+
+ s->vhost_net = 0;
+}
+
+static void vhost_user_cleanup(NetClientState *nc)
+{
+ VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+
+ vhost_user_stop(s);
+ qemu_purge_queued_packets(nc);
+}
+
+static bool vhost_user_has_vnet_hdr(NetClientState *nc)
+{
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+
+ return true;
+}
+
+static bool vhost_user_has_ufo(NetClientState *nc)
+{
+ assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+
+ return true;
+}
+
+static NetClientInfo net_vhost_user_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_VHOST_USER,
+ .size = sizeof(VhostUserState),
+ .cleanup = vhost_user_cleanup,
+ .has_vnet_hdr = vhost_user_has_vnet_hdr,
+ .has_ufo = vhost_user_has_ufo,
+};
+
+static void net_vhost_link_down(VhostUserState *s, bool link_down)
+{
+ s->nc.link_down = link_down;
+
+ if (s->nc.peer) {
+ s->nc.peer->link_down = link_down;
+ }
+
+ if (s->nc.info->link_status_changed) {
+ s->nc.info->link_status_changed(&s->nc);
+ }
+
+ if (s->nc.peer && s->nc.peer->info->link_status_changed) {
+ s->nc.peer->info->link_status_changed(s->nc.peer);
+ }
+}
+
+static void net_vhost_user_event(void *opaque, int event)
+{
+ VhostUserState *s = opaque;
+
+ switch (event) {
+ case CHR_EVENT_OPENED:
+ vhost_user_start(s);
+ net_vhost_link_down(s, false);
+ error_report("chardev \"%s\" went up", s->chr->label);
+ break;
+ case CHR_EVENT_CLOSED:
+ net_vhost_link_down(s, true);
+ vhost_user_stop(s);
+ error_report("chardev \"%s\" went down", s->chr->label);
+ break;
+ }
+}
+
+static int net_vhost_user_init(NetClientState *peer, const char *device,
+ const char *name, CharDriverState *chr)
+{
+ NetClientState *nc;
+ VhostUserState *s;
+
+ nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user to %s",
+ chr->label);
+
+ s = DO_UPCAST(VhostUserState, nc, nc);
+
+ /* We don't provide a receive callback */
+ s->nc.receive_disabled = 1;
+ s->chr = chr;
+
+ qemu_chr_add_handlers(s->chr, NULL, NULL, net_vhost_user_event, s);
+
+ return 0;
+}
+
+static int net_vhost_chardev_opts(void *opaque,
+ const char *name, const char *value,
+ Error **errp)
+{
+ VhostUserChardevProps *props = opaque;
+
+ if (strcmp(name, "backend") == 0 && strcmp(value, "socket") == 0) {
+ props->is_socket = true;
+ } else if (strcmp(name, "path") == 0) {
+ props->is_unix = true;
+ } else if (strcmp(name, "server") == 0) {
+ props->is_server = true;
+ } else {
+ error_setg(errp,
+ "vhost-user does not support a chardev with option %s=%s",
+ name, value);
+ return -1;
+ }
+ return 0;
+}
+
+static CharDriverState *net_vhost_parse_chardev(
+ const NetdevVhostUserOptions *opts, Error **errp)
+{
+ CharDriverState *chr = qemu_chr_find(opts->chardev);
+ VhostUserChardevProps props;
+
+ if (chr == NULL) {
+ error_setg(errp, "chardev \"%s\" not found", opts->chardev);
+ return NULL;
+ }
+
+ /* inspect chardev opts */
+ memset(&props, 0, sizeof(props));
+ if (qemu_opt_foreach(chr->opts, net_vhost_chardev_opts, &props, errp)) {
+ return NULL;
+ }
+
+ if (!props.is_socket || !props.is_unix) {
+ error_setg(errp, "chardev \"%s\" is not a unix socket",
+ opts->chardev);
+ return NULL;
+ }
+
+ qemu_chr_fe_claim_no_fail(chr);
+
+ return chr;
+}
+
+static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
+{
+ const char *name = opaque;
+ const char *driver, *netdev;
+ const char virtio_name[] = "virtio-net-";
+
+ driver = qemu_opt_get(opts, "driver");
+ netdev = qemu_opt_get(opts, "netdev");
+
+ if (!driver || !netdev) {
+ return 0;
+ }
+
+ if (strcmp(netdev, name) == 0 &&
+ strncmp(driver, virtio_name, strlen(virtio_name)) != 0) {
+ error_setg(errp, "vhost-user requires frontend driver virtio-net-*");
+ return -1;
+ }
+
+ return 0;
+}
+
+int net_init_vhost_user(const NetClientOptions *opts, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevVhostUserOptions *vhost_user_opts;
+ CharDriverState *chr;
+
+ assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+ vhost_user_opts = opts->vhost_user;
+
+ chr = net_vhost_parse_chardev(vhost_user_opts, errp);
+ if (!chr) {
+ return -1;
+ }
+
+ /* verify net frontend */
+ if (qemu_opts_foreach(qemu_find_opts("device"), net_vhost_check_net,
+ (char *)name, errp)) {
+ return -1;
+ }
+
+
+ return net_vhost_user_init(peer, "vhost_user", name, chr);
+}