diff options
Diffstat (limited to 'qemu/slirp/slirp.c')
| -rw-r--r-- | qemu/slirp/slirp.c | 1354 |
1 files changed, 0 insertions, 1354 deletions
diff --git a/qemu/slirp/slirp.c b/qemu/slirp/slirp.c deleted file mode 100644 index 9f4bea3d3..000000000 --- a/qemu/slirp/slirp.c +++ /dev/null @@ -1,1354 +0,0 @@ -/* - * libslirp glue - * - * Copyright (c) 2004-2008 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 "qemu/osdep.h" -#include "qemu-common.h" -#include "qemu/timer.h" -#include "qemu/error-report.h" -#include "sysemu/char.h" -#include "slirp.h" -#include "hw/hw.h" -#include "qemu/cutils.h" - -/* host loopback address */ -struct in_addr loopback_addr; -/* host loopback network mask */ -unsigned long loopback_mask; - -/* emulated hosts use the MAC addr 52:55:IP:IP:IP:IP */ -static const uint8_t special_ethaddr[ETH_ALEN] = { - 0x52, 0x55, 0x00, 0x00, 0x00, 0x00 -}; - -u_int curtime; - -static QTAILQ_HEAD(slirp_instances, Slirp) slirp_instances = - QTAILQ_HEAD_INITIALIZER(slirp_instances); - -static struct in_addr dns_addr; -static u_int dns_addr_time; - -#define TIMEOUT_FAST 2 /* milliseconds */ -#define TIMEOUT_SLOW 499 /* milliseconds */ -/* for the aging of certain requests like DNS */ -#define TIMEOUT_DEFAULT 1000 /* milliseconds */ - -#ifdef _WIN32 - -int get_dns_addr(struct in_addr *pdns_addr) -{ - FIXED_INFO *FixedInfo=NULL; - ULONG BufLen; - DWORD ret; - IP_ADDR_STRING *pIPAddr; - struct in_addr tmp_addr; - - if (dns_addr.s_addr != 0 && (curtime - dns_addr_time) < TIMEOUT_DEFAULT) { - *pdns_addr = dns_addr; - return 0; - } - - FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO)); - BufLen = sizeof(FIXED_INFO); - - if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) { - if (FixedInfo) { - GlobalFree(FixedInfo); - FixedInfo = NULL; - } - FixedInfo = GlobalAlloc(GPTR, BufLen); - } - - if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) { - printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret ); - if (FixedInfo) { - GlobalFree(FixedInfo); - FixedInfo = NULL; - } - return -1; - } - - pIPAddr = &(FixedInfo->DnsServerList); - inet_aton(pIPAddr->IpAddress.String, &tmp_addr); - *pdns_addr = tmp_addr; - dns_addr = tmp_addr; - dns_addr_time = curtime; - if (FixedInfo) { - GlobalFree(FixedInfo); - FixedInfo = NULL; - } - return 0; -} - -static void winsock_cleanup(void) -{ - WSACleanup(); -} - -#else - -static struct stat dns_addr_stat; - -int get_dns_addr(struct in_addr *pdns_addr) -{ - char buff[512]; - char buff2[257]; - FILE *f; - int found = 0; - struct in_addr tmp_addr; - - if (dns_addr.s_addr != 0) { - struct stat old_stat; - if ((curtime - dns_addr_time) < TIMEOUT_DEFAULT) { - *pdns_addr = dns_addr; - return 0; - } - old_stat = dns_addr_stat; - if (stat("/etc/resolv.conf", &dns_addr_stat) != 0) - return -1; - if ((dns_addr_stat.st_dev == old_stat.st_dev) - && (dns_addr_stat.st_ino == old_stat.st_ino) - && (dns_addr_stat.st_size == old_stat.st_size) - && (dns_addr_stat.st_mtime == old_stat.st_mtime)) { - *pdns_addr = dns_addr; - return 0; - } - } - - f = fopen("/etc/resolv.conf", "r"); - if (!f) - return -1; - -#ifdef DEBUG - fprintf(stderr, "IP address of your DNS(s): "); -#endif - while (fgets(buff, 512, f) != NULL) { - if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { - if (!inet_aton(buff2, &tmp_addr)) - continue; - /* If it's the first one, set it to dns_addr */ - if (!found) { - *pdns_addr = tmp_addr; - dns_addr = tmp_addr; - dns_addr_time = curtime; - } -#ifdef DEBUG - else - fprintf(stderr, ", "); -#endif - if (++found > 3) { -#ifdef DEBUG - fprintf(stderr, "(more)"); -#endif - break; - } -#ifdef DEBUG - else - fprintf(stderr, "%s", inet_ntoa(tmp_addr)); -#endif - } - } - fclose(f); - if (!found) - return -1; - return 0; -} - -#endif - -static void slirp_init_once(void) -{ - static int initialized; -#ifdef _WIN32 - WSADATA Data; -#endif - - if (initialized) { - return; - } - initialized = 1; - -#ifdef _WIN32 - WSAStartup(MAKEWORD(2,0), &Data); - atexit(winsock_cleanup); -#endif - - loopback_addr.s_addr = htonl(INADDR_LOOPBACK); - loopback_mask = htonl(IN_CLASSA_NET); -} - -static void slirp_state_save(QEMUFile *f, void *opaque); -static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); - -Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork, - struct in_addr vnetmask, struct in_addr vhost, - bool in6_enabled, - struct in6_addr vprefix_addr6, uint8_t vprefix_len, - struct in6_addr vhost6, const char *vhostname, - const char *tftp_path, const char *bootfile, - struct in_addr vdhcp_start, struct in_addr vnameserver, - struct in6_addr vnameserver6, const char **vdnssearch, - void *opaque) -{ - Slirp *slirp = g_malloc0(sizeof(Slirp)); - - slirp_init_once(); - - slirp->grand = g_rand_new(); - slirp->restricted = restricted; - - slirp->in_enabled = in_enabled; - slirp->in6_enabled = in6_enabled; - - if_init(slirp); - ip_init(slirp); - ip6_init(slirp); - - /* Initialise mbufs *after* setting the MTU */ - m_init(slirp); - - slirp->vnetwork_addr = vnetwork; - slirp->vnetwork_mask = vnetmask; - slirp->vhost_addr = vhost; - slirp->vprefix_addr6 = vprefix_addr6; - slirp->vprefix_len = vprefix_len; - slirp->vhost_addr6 = vhost6; - if (vhostname) { - pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname), - vhostname); - } - slirp->tftp_prefix = g_strdup(tftp_path); - slirp->bootp_filename = g_strdup(bootfile); - slirp->vdhcp_startaddr = vdhcp_start; - slirp->vnameserver_addr = vnameserver; - slirp->vnameserver_addr6 = vnameserver6; - - if (vdnssearch) { - translate_dnssearch(slirp, vdnssearch); - } - - slirp->opaque = opaque; - - register_savevm(NULL, "slirp", 0, 4, - slirp_state_save, slirp_state_load, slirp); - - QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry); - - return slirp; -} - -void slirp_cleanup(Slirp *slirp) -{ - QTAILQ_REMOVE(&slirp_instances, slirp, entry); - - unregister_savevm(NULL, "slirp", slirp); - - ip_cleanup(slirp); - ip6_cleanup(slirp); - m_cleanup(slirp); - - g_rand_free(slirp->grand); - - g_free(slirp->vdnssearch); - g_free(slirp->tftp_prefix); - g_free(slirp->bootp_filename); - g_free(slirp); -} - -#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) -#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) - -static void slirp_update_timeout(uint32_t *timeout) -{ - Slirp *slirp; - uint32_t t; - - if (*timeout <= TIMEOUT_FAST) { - return; - } - - t = MIN(1000, *timeout); - - /* If we have tcp timeout with slirp, then we will fill @timeout with - * more precise value. - */ - QTAILQ_FOREACH(slirp, &slirp_instances, entry) { - if (slirp->time_fasttimo) { - *timeout = TIMEOUT_FAST; - return; - } - if (slirp->do_slowtimo) { - t = MIN(TIMEOUT_SLOW, t); - } - } - *timeout = t; -} - -void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout) -{ - Slirp *slirp; - struct socket *so, *so_next; - - if (QTAILQ_EMPTY(&slirp_instances)) { - return; - } - - /* - * First, TCP sockets - */ - - QTAILQ_FOREACH(slirp, &slirp_instances, entry) { - /* - * *_slowtimo needs calling if there are IP fragments - * in the fragment queue, or there are TCP connections active - */ - slirp->do_slowtimo = ((slirp->tcb.so_next != &slirp->tcb) || - (&slirp->ipq.ip_link != slirp->ipq.ip_link.next)); - - for (so = slirp->tcb.so_next; so != &slirp->tcb; - so = so_next) { - int events = 0; - - so_next = so->so_next; - - so->pollfds_idx = -1; - - /* - * See if we need a tcp_fasttimo - */ - if (slirp->time_fasttimo == 0 && - so->so_tcpcb->t_flags & TF_DELACK) { - slirp->time_fasttimo = curtime; /* Flag when want a fasttimo */ - } - - /* - * NOFDREF can include still connecting to local-host, - * newly socreated() sockets etc. Don't want to select these. - */ - if (so->so_state & SS_NOFDREF || so->s == -1) { - continue; - } - - /* - * Set for reading sockets which are accepting - */ - if (so->so_state & SS_FACCEPTCONN) { - GPollFD pfd = { - .fd = so->s, - .events = G_IO_IN | G_IO_HUP | G_IO_ERR, - }; - so->pollfds_idx = pollfds->len; - g_array_append_val(pollfds, pfd); - continue; - } - - /* - * Set for writing sockets which are connecting - */ - if (so->so_state & SS_ISFCONNECTING) { - GPollFD pfd = { - .fd = so->s, - .events = G_IO_OUT | G_IO_ERR, - }; - so->pollfds_idx = pollfds->len; - g_array_append_val(pollfds, pfd); - continue; - } - - /* - * Set for writing if we are connected, can send more, and - * we have something to send - */ - if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) { - events |= G_IO_OUT | G_IO_ERR; - } - - /* - * Set for reading (and urgent data) if we are connected, can - * receive more, and we have room for it XXX /2 ? - */ - if (CONN_CANFRCV(so) && - (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { - events |= G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI; - } - - if (events) { - GPollFD pfd = { - .fd = so->s, - .events = events, - }; - so->pollfds_idx = pollfds->len; - g_array_append_val(pollfds, pfd); - } - } - - /* - * UDP sockets - */ - for (so = slirp->udb.so_next; so != &slirp->udb; - so = so_next) { - so_next = so->so_next; - - so->pollfds_idx = -1; - - /* - * See if it's timed out - */ - if (so->so_expire) { - if (so->so_expire <= curtime) { - udp_detach(so); - continue; - } else { - slirp->do_slowtimo = true; /* Let socket expire */ - } - } - - /* - * When UDP packets are received from over the - * link, they're sendto()'d straight away, so - * no need for setting for writing - * Limit the number of packets queued by this session - * to 4. Note that even though we try and limit this - * to 4 packets, the session could have more queued - * if the packets needed to be fragmented - * (XXX <= 4 ?) - */ - if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { - GPollFD pfd = { - .fd = so->s, - .events = G_IO_IN | G_IO_HUP | G_IO_ERR, - }; - so->pollfds_idx = pollfds->len; - g_array_append_val(pollfds, pfd); - } - } - - /* - * ICMP sockets - */ - for (so = slirp->icmp.so_next; so != &slirp->icmp; - so = so_next) { - so_next = so->so_next; - - so->pollfds_idx = -1; - - /* - * See if it's timed out - */ - if (so->so_expire) { - if (so->so_expire <= curtime) { - icmp_detach(so); - continue; - } else { - slirp->do_slowtimo = true; /* Let socket expire */ - } - } - - if (so->so_state & SS_ISFCONNECTED) { - GPollFD pfd = { - .fd = so->s, - .events = G_IO_IN | G_IO_HUP | G_IO_ERR, - }; - so->pollfds_idx = pollfds->len; - g_array_append_val(pollfds, pfd); - } - } - } - slirp_update_timeout(timeout); -} - -void slirp_pollfds_poll(GArray *pollfds, int select_error) -{ - Slirp *slirp; - struct socket *so, *so_next; - int ret; - - if (QTAILQ_EMPTY(&slirp_instances)) { - return; - } - - curtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); - - QTAILQ_FOREACH(slirp, &slirp_instances, entry) { - /* - * See if anything has timed out - */ - if (slirp->time_fasttimo && - ((curtime - slirp->time_fasttimo) >= TIMEOUT_FAST)) { - tcp_fasttimo(slirp); - slirp->time_fasttimo = 0; - } - if (slirp->do_slowtimo && - ((curtime - slirp->last_slowtimo) >= TIMEOUT_SLOW)) { - ip_slowtimo(slirp); - tcp_slowtimo(slirp); - slirp->last_slowtimo = curtime; - } - - /* - * Check sockets - */ - if (!select_error) { - /* - * Check TCP sockets - */ - for (so = slirp->tcb.so_next; so != &slirp->tcb; - so = so_next) { - int revents; - - so_next = so->so_next; - - revents = 0; - if (so->pollfds_idx != -1) { - revents = g_array_index(pollfds, GPollFD, - so->pollfds_idx).revents; - } - - if (so->so_state & SS_NOFDREF || so->s == -1) { - continue; - } - - /* - * Check for URG data - * This will soread as well, so no need to - * test for G_IO_IN below if this succeeds - */ - if (revents & G_IO_PRI) { - ret = sorecvoob(so); - if (ret < 0) { - /* Socket error might have resulted in the socket being - * removed, do not try to do anything more with it. */ - continue; - } - } - /* - * Check sockets for reading - */ - else if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) { - /* - * Check for incoming connections - */ - if (so->so_state & SS_FACCEPTCONN) { - tcp_connect(so); - continue; - } /* else */ - ret = soread(so); - - /* Output it if we read something */ - if (ret > 0) { - tcp_output(sototcpcb(so)); - } - if (ret < 0) { - /* Socket error might have resulted in the socket being - * removed, do not try to do anything more with it. */ - continue; - } - } - - /* - * Check sockets for writing - */ - if (!(so->so_state & SS_NOFDREF) && - (revents & (G_IO_OUT | G_IO_ERR))) { - /* - * Check for non-blocking, still-connecting sockets - */ - if (so->so_state & SS_ISFCONNECTING) { - /* Connected */ - so->so_state &= ~SS_ISFCONNECTING; - - ret = send(so->s, (const void *) &ret, 0, 0); - if (ret < 0) { - /* XXXXX Must fix, zero bytes is a NOP */ - if (errno == EAGAIN || errno == EWOULDBLOCK || - errno == EINPROGRESS || errno == ENOTCONN) { - continue; - } - - /* else failed */ - so->so_state &= SS_PERSISTENT_MASK; - so->so_state |= SS_NOFDREF; - } - /* else so->so_state &= ~SS_ISFCONNECTING; */ - - /* - * Continue tcp_input - */ - tcp_input((struct mbuf *)NULL, sizeof(struct ip), so, - so->so_ffamily); - /* continue; */ - } else { - ret = sowrite(so); - } - /* - * XXXXX If we wrote something (a lot), there - * could be a need for a window update. - * In the worst case, the remote will send - * a window probe to get things going again - */ - } - - /* - * Probe a still-connecting, non-blocking socket - * to check if it's still alive - */ -#ifdef PROBE_CONN - if (so->so_state & SS_ISFCONNECTING) { - ret = qemu_recv(so->s, &ret, 0, 0); - - if (ret < 0) { - /* XXX */ - if (errno == EAGAIN || errno == EWOULDBLOCK || - errno == EINPROGRESS || errno == ENOTCONN) { - continue; /* Still connecting, continue */ - } - - /* else failed */ - so->so_state &= SS_PERSISTENT_MASK; - so->so_state |= SS_NOFDREF; - - /* tcp_input will take care of it */ - } else { - ret = send(so->s, &ret, 0, 0); - if (ret < 0) { - /* XXX */ - if (errno == EAGAIN || errno == EWOULDBLOCK || - errno == EINPROGRESS || errno == ENOTCONN) { - continue; - } - /* else failed */ - so->so_state &= SS_PERSISTENT_MASK; - so->so_state |= SS_NOFDREF; - } else { - so->so_state &= ~SS_ISFCONNECTING; - } - - } - tcp_input((struct mbuf *)NULL, sizeof(struct ip), so, - so->so_ffamily); - } /* SS_ISFCONNECTING */ -#endif - } - - /* - * Now UDP sockets. - * Incoming packets are sent straight away, they're not buffered. - * Incoming UDP data isn't buffered either. - */ - for (so = slirp->udb.so_next; so != &slirp->udb; - so = so_next) { - int revents; - - so_next = so->so_next; - - revents = 0; - if (so->pollfds_idx != -1) { - revents = g_array_index(pollfds, GPollFD, - so->pollfds_idx).revents; - } - - if (so->s != -1 && - (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) { - sorecvfrom(so); - } - } - - /* - * Check incoming ICMP relies. - */ - for (so = slirp->icmp.so_next; so != &slirp->icmp; - so = so_next) { - int revents; - - so_next = so->so_next; - - revents = 0; - if (so->pollfds_idx != -1) { - revents = g_array_index(pollfds, GPollFD, - so->pollfds_idx).revents; - } - - if (so->s != -1 && - (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) { - icmp_receive(so); - } - } - } - - if_start(slirp); - } -} - -static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) -{ - struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); - uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)]; - struct ethhdr *reh = (struct ethhdr *)arp_reply; - struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); - int ar_op; - struct ex_list *ex_ptr; - - if (!slirp->in_enabled) { - return; - } - - ar_op = ntohs(ah->ar_op); - switch(ar_op) { - case ARPOP_REQUEST: - if (ah->ar_tip == ah->ar_sip) { - /* Gratuitous ARP */ - arp_table_add(slirp, ah->ar_sip, ah->ar_sha); - return; - } - - if ((ah->ar_tip & slirp->vnetwork_mask.s_addr) == - slirp->vnetwork_addr.s_addr) { - if (ah->ar_tip == slirp->vnameserver_addr.s_addr || - ah->ar_tip == slirp->vhost_addr.s_addr) - goto arp_ok; - for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { - if (ex_ptr->ex_addr.s_addr == ah->ar_tip) - goto arp_ok; - } - return; - arp_ok: - memset(arp_reply, 0, sizeof(arp_reply)); - - arp_table_add(slirp, ah->ar_sip, ah->ar_sha); - - /* ARP request for alias/dns mac address */ - memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); - memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4); - memcpy(&reh->h_source[2], &ah->ar_tip, 4); - reh->h_proto = htons(ETH_P_ARP); - - rah->ar_hrd = htons(1); - rah->ar_pro = htons(ETH_P_IP); - rah->ar_hln = ETH_ALEN; - rah->ar_pln = 4; - rah->ar_op = htons(ARPOP_REPLY); - memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); - rah->ar_sip = ah->ar_tip; - memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); - rah->ar_tip = ah->ar_sip; - slirp_output(slirp->opaque, arp_reply, sizeof(arp_reply)); - } - break; - case ARPOP_REPLY: - arp_table_add(slirp, ah->ar_sip, ah->ar_sha); - break; - default: - break; - } -} - -void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) -{ - struct mbuf *m; - int proto; - - if (pkt_len < ETH_HLEN) - return; - - proto = ntohs(*(uint16_t *)(pkt + 12)); - switch(proto) { - case ETH_P_ARP: - arp_input(slirp, pkt, pkt_len); - break; - case ETH_P_IP: - case ETH_P_IPV6: - m = m_get(slirp); - if (!m) - return; - /* Note: we add 2 to align the IP header on 4 bytes, - * and add the margin for the tcpiphdr overhead */ - if (M_FREEROOM(m) < pkt_len + TCPIPHDR_DELTA + 2) { - m_inc(m, pkt_len + TCPIPHDR_DELTA + 2); - } - m->m_len = pkt_len + TCPIPHDR_DELTA + 2; - memcpy(m->m_data + TCPIPHDR_DELTA + 2, pkt, pkt_len); - - m->m_data += TCPIPHDR_DELTA + 2 + ETH_HLEN; - m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN; - - if (proto == ETH_P_IP) { - ip_input(m); - } else if (proto == ETH_P_IPV6) { - ip6_input(m); - } - break; - - default: - break; - } -} - -/* Prepare the IPv4 packet to be sent to the ethernet device. Returns 1 if no - * packet should be sent, 0 if the packet must be re-queued, 2 if the packet - * is ready to go. - */ -static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh, - uint8_t ethaddr[ETH_ALEN]) -{ - const struct ip *iph = (const struct ip *)ifm->m_data; - - if (iph->ip_dst.s_addr == 0) { - /* 0.0.0.0 can not be a destination address, something went wrong, - * avoid making it worse */ - return 1; - } - if (!arp_table_search(slirp, iph->ip_dst.s_addr, ethaddr)) { - uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)]; - struct ethhdr *reh = (struct ethhdr *)arp_req; - struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN); - - if (!ifm->resolution_requested) { - /* If the client addr is not known, send an ARP request */ - memset(reh->h_dest, 0xff, ETH_ALEN); - memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4); - memcpy(&reh->h_source[2], &slirp->vhost_addr, 4); - reh->h_proto = htons(ETH_P_ARP); - rah->ar_hrd = htons(1); - rah->ar_pro = htons(ETH_P_IP); - rah->ar_hln = ETH_ALEN; - rah->ar_pln = 4; - rah->ar_op = htons(ARPOP_REQUEST); - - /* source hw addr */ - memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 4); - memcpy(&rah->ar_sha[2], &slirp->vhost_addr, 4); - - /* source IP */ - rah->ar_sip = slirp->vhost_addr.s_addr; - - /* target hw addr (none) */ - memset(rah->ar_tha, 0, ETH_ALEN); - - /* target IP */ - rah->ar_tip = iph->ip_dst.s_addr; - slirp->client_ipaddr = iph->ip_dst; - slirp_output(slirp->opaque, arp_req, sizeof(arp_req)); - ifm->resolution_requested = true; - - /* Expire request and drop outgoing packet after 1 second */ - ifm->expiration_date = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL; - } - return 0; - } else { - memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4); - /* XXX: not correct */ - memcpy(&eh->h_source[2], &slirp->vhost_addr, 4); - eh->h_proto = htons(ETH_P_IP); - - /* Send this */ - return 2; - } -} - -/* Prepare the IPv6 packet to be sent to the ethernet device. Returns 1 if no - * packet should be sent, 0 if the packet must be re-queued, 2 if the packet - * is ready to go. - */ -static int if_encap6(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh, - uint8_t ethaddr[ETH_ALEN]) -{ - const struct ip6 *ip6h = mtod(ifm, const struct ip6 *); - if (!ndp_table_search(slirp, ip6h->ip_dst, ethaddr)) { - if (!ifm->resolution_requested) { - ndp_send_ns(slirp, ip6h->ip_dst); - ifm->resolution_requested = true; - ifm->expiration_date = - qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL; - } - return 0; - } else { - eh->h_proto = htons(ETH_P_IPV6); - in6_compute_ethaddr(ip6h->ip_src, eh->h_source); - - /* Send this */ - return 2; - } -} - -/* Output the IP packet to the ethernet device. Returns 0 if the packet must be - * re-queued. - */ -int if_encap(Slirp *slirp, struct mbuf *ifm) -{ - uint8_t buf[1600]; - struct ethhdr *eh = (struct ethhdr *)buf; - uint8_t ethaddr[ETH_ALEN]; - const struct ip *iph = (const struct ip *)ifm->m_data; - int ret; - - if (ifm->m_len + ETH_HLEN > sizeof(buf)) { - return 1; - } - - switch (iph->ip_v) { - case IPVERSION: - ret = if_encap4(slirp, ifm, eh, ethaddr); - if (ret < 2) { - return ret; - } - break; - - case IP6VERSION: - ret = if_encap6(slirp, ifm, eh, ethaddr); - if (ret < 2) { - return ret; - } - break; - - default: - g_assert_not_reached(); - break; - } - - memcpy(eh->h_dest, ethaddr, ETH_ALEN); - DEBUG_ARGS((dfd, " src = %02x:%02x:%02x:%02x:%02x:%02x\n", - eh->h_source[0], eh->h_source[1], eh->h_source[2], - eh->h_source[3], eh->h_source[4], eh->h_source[5])); - DEBUG_ARGS((dfd, " dst = %02x:%02x:%02x:%02x:%02x:%02x\n", - eh->h_dest[0], eh->h_dest[1], eh->h_dest[2], - eh->h_dest[3], eh->h_dest[4], eh->h_dest[5])); - memcpy(buf + sizeof(struct ethhdr), ifm->m_data, ifm->m_len); - slirp_output(slirp->opaque, buf, ifm->m_len + ETH_HLEN); - return 1; -} - -/* Drop host forwarding rule, return 0 if found. */ -int slirp_remove_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, - int host_port) -{ - struct socket *so; - struct socket *head = (is_udp ? &slirp->udb : &slirp->tcb); - struct sockaddr_in addr; - int port = htons(host_port); - socklen_t addr_len; - - for (so = head->so_next; so != head; so = so->so_next) { - addr_len = sizeof(addr); - if ((so->so_state & SS_HOSTFWD) && - getsockname(so->s, (struct sockaddr *)&addr, &addr_len) == 0 && - addr.sin_addr.s_addr == host_addr.s_addr && - addr.sin_port == port) { - close(so->s); - sofree(so); - return 0; - } - } - - return -1; -} - -int slirp_add_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, - int host_port, struct in_addr guest_addr, int guest_port) -{ - if (!guest_addr.s_addr) { - guest_addr = slirp->vdhcp_startaddr; - } - if (is_udp) { - if (!udp_listen(slirp, host_addr.s_addr, htons(host_port), - guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) - return -1; - } else { - if (!tcp_listen(slirp, host_addr.s_addr, htons(host_port), - guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) - return -1; - } - return 0; -} - -int slirp_add_exec(Slirp *slirp, int do_pty, const void *args, - struct in_addr *guest_addr, int guest_port) -{ - if (!guest_addr->s_addr) { - guest_addr->s_addr = slirp->vnetwork_addr.s_addr | - (htonl(0x0204) & ~slirp->vnetwork_mask.s_addr); - } - if ((guest_addr->s_addr & slirp->vnetwork_mask.s_addr) != - slirp->vnetwork_addr.s_addr || - guest_addr->s_addr == slirp->vhost_addr.s_addr || - guest_addr->s_addr == slirp->vnameserver_addr.s_addr) { - return -1; - } - return add_exec(&slirp->exec_list, do_pty, (char *)args, *guest_addr, - htons(guest_port)); -} - -ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) -{ - if (so->s == -1 && so->extra) { - qemu_chr_fe_write(so->extra, buf, len); - return len; - } - - return send(so->s, buf, len, flags); -} - -static struct socket * -slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port) -{ - struct socket *so; - - for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) { - if (so->so_faddr.s_addr == guest_addr.s_addr && - htons(so->so_fport) == guest_port) { - return so; - } - } - return NULL; -} - -size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr, - int guest_port) -{ - struct iovec iov[2]; - struct socket *so; - - so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); - - if (!so || so->so_state & SS_NOFDREF) { - return 0; - } - - if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) { - return 0; - } - - return sopreprbuf(so, iov, NULL); -} - -void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port, - const uint8_t *buf, int size) -{ - int ret; - struct socket *so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); - - if (!so) - return; - - ret = soreadbuf(so, (const char *)buf, size); - - if (ret > 0) - tcp_output(sototcpcb(so)); -} - -static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp) -{ - int i; - - qemu_put_sbe16(f, tp->t_state); - for (i = 0; i < TCPT_NTIMERS; i++) - qemu_put_sbe16(f, tp->t_timer[i]); - qemu_put_sbe16(f, tp->t_rxtshift); - qemu_put_sbe16(f, tp->t_rxtcur); - qemu_put_sbe16(f, tp->t_dupacks); - qemu_put_be16(f, tp->t_maxseg); - qemu_put_sbyte(f, tp->t_force); - qemu_put_be16(f, tp->t_flags); - qemu_put_be32(f, tp->snd_una); - qemu_put_be32(f, tp->snd_nxt); - qemu_put_be32(f, tp->snd_up); - qemu_put_be32(f, tp->snd_wl1); - qemu_put_be32(f, tp->snd_wl2); - qemu_put_be32(f, tp->iss); - qemu_put_be32(f, tp->snd_wnd); - qemu_put_be32(f, tp->rcv_wnd); - qemu_put_be32(f, tp->rcv_nxt); - qemu_put_be32(f, tp->rcv_up); - qemu_put_be32(f, tp->irs); - qemu_put_be32(f, tp->rcv_adv); - qemu_put_be32(f, tp->snd_max); - qemu_put_be32(f, tp->snd_cwnd); - qemu_put_be32(f, tp->snd_ssthresh); - qemu_put_sbe16(f, tp->t_idle); - qemu_put_sbe16(f, tp->t_rtt); - qemu_put_be32(f, tp->t_rtseq); - qemu_put_sbe16(f, tp->t_srtt); - qemu_put_sbe16(f, tp->t_rttvar); - qemu_put_be16(f, tp->t_rttmin); - qemu_put_be32(f, tp->max_sndwnd); - qemu_put_byte(f, tp->t_oobflags); - qemu_put_byte(f, tp->t_iobc); - qemu_put_sbe16(f, tp->t_softerror); - qemu_put_byte(f, tp->snd_scale); - qemu_put_byte(f, tp->rcv_scale); - qemu_put_byte(f, tp->request_r_scale); - qemu_put_byte(f, tp->requested_s_scale); - qemu_put_be32(f, tp->ts_recent); - qemu_put_be32(f, tp->ts_recent_age); - qemu_put_be32(f, tp->last_ack_sent); -} - -static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf) -{ - uint32_t off; - - qemu_put_be32(f, sbuf->sb_cc); - qemu_put_be32(f, sbuf->sb_datalen); - off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data); - qemu_put_sbe32(f, off); - off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data); - qemu_put_sbe32(f, off); - qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); -} - -static void slirp_socket_save(QEMUFile *f, struct socket *so) -{ - qemu_put_be32(f, so->so_urgc); - qemu_put_be16(f, so->so_ffamily); - switch (so->so_ffamily) { - case AF_INET: - qemu_put_be32(f, so->so_faddr.s_addr); - qemu_put_be16(f, so->so_fport); - break; - default: - error_report( - "so_ffamily unknown, unable to save so_faddr and so_fport\n"); - } - qemu_put_be16(f, so->so_lfamily); - switch (so->so_lfamily) { - case AF_INET: - qemu_put_be32(f, so->so_laddr.s_addr); - qemu_put_be16(f, so->so_lport); - break; - default: - error_report( - "so_ffamily unknown, unable to save so_laddr and so_lport\n"); - } - qemu_put_byte(f, so->so_iptos); - qemu_put_byte(f, so->so_emu); - qemu_put_byte(f, so->so_type); - qemu_put_be32(f, so->so_state); - slirp_sbuf_save(f, &so->so_rcv); - slirp_sbuf_save(f, &so->so_snd); - slirp_tcp_save(f, so->so_tcpcb); -} - -static void slirp_bootp_save(QEMUFile *f, Slirp *slirp) -{ - int i; - - for (i = 0; i < NB_BOOTP_CLIENTS; i++) { - qemu_put_be16(f, slirp->bootp_clients[i].allocated); - qemu_put_buffer(f, slirp->bootp_clients[i].macaddr, 6); - } -} - -static void slirp_state_save(QEMUFile *f, void *opaque) -{ - Slirp *slirp = opaque; - struct ex_list *ex_ptr; - - for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) - if (ex_ptr->ex_pty == 3) { - struct socket *so; - so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, - ntohs(ex_ptr->ex_fport)); - if (!so) - continue; - - qemu_put_byte(f, 42); - slirp_socket_save(f, so); - } - qemu_put_byte(f, 0); - - qemu_put_be16(f, slirp->ip_id); - - slirp_bootp_save(f, slirp); -} - -static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp) -{ - int i; - - tp->t_state = qemu_get_sbe16(f); - for (i = 0; i < TCPT_NTIMERS; i++) - tp->t_timer[i] = qemu_get_sbe16(f); - tp->t_rxtshift = qemu_get_sbe16(f); - tp->t_rxtcur = qemu_get_sbe16(f); - tp->t_dupacks = qemu_get_sbe16(f); - tp->t_maxseg = qemu_get_be16(f); - tp->t_force = qemu_get_sbyte(f); - tp->t_flags = qemu_get_be16(f); - tp->snd_una = qemu_get_be32(f); - tp->snd_nxt = qemu_get_be32(f); - tp->snd_up = qemu_get_be32(f); - tp->snd_wl1 = qemu_get_be32(f); - tp->snd_wl2 = qemu_get_be32(f); - tp->iss = qemu_get_be32(f); - tp->snd_wnd = qemu_get_be32(f); - tp->rcv_wnd = qemu_get_be32(f); - tp->rcv_nxt = qemu_get_be32(f); - tp->rcv_up = qemu_get_be32(f); - tp->irs = qemu_get_be32(f); - tp->rcv_adv = qemu_get_be32(f); - tp->snd_max = qemu_get_be32(f); - tp->snd_cwnd = qemu_get_be32(f); - tp->snd_ssthresh = qemu_get_be32(f); - tp->t_idle = qemu_get_sbe16(f); - tp->t_rtt = qemu_get_sbe16(f); - tp->t_rtseq = qemu_get_be32(f); - tp->t_srtt = qemu_get_sbe16(f); - tp->t_rttvar = qemu_get_sbe16(f); - tp->t_rttmin = qemu_get_be16(f); - tp->max_sndwnd = qemu_get_be32(f); - tp->t_oobflags = qemu_get_byte(f); - tp->t_iobc = qemu_get_byte(f); - tp->t_softerror = qemu_get_sbe16(f); - tp->snd_scale = qemu_get_byte(f); - tp->rcv_scale = qemu_get_byte(f); - tp->request_r_scale = qemu_get_byte(f); - tp->requested_s_scale = qemu_get_byte(f); - tp->ts_recent = qemu_get_be32(f); - tp->ts_recent_age = qemu_get_be32(f); - tp->last_ack_sent = qemu_get_be32(f); - tcp_template(tp); -} - -static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) -{ - uint32_t off, sb_cc, sb_datalen; - - sb_cc = qemu_get_be32(f); - sb_datalen = qemu_get_be32(f); - - sbreserve(sbuf, sb_datalen); - - if (sbuf->sb_datalen != sb_datalen) - return -ENOMEM; - - sbuf->sb_cc = sb_cc; - - off = qemu_get_sbe32(f); - sbuf->sb_wptr = sbuf->sb_data + off; - off = qemu_get_sbe32(f); - sbuf->sb_rptr = sbuf->sb_data + off; - qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); - - return 0; -} - -static int slirp_socket_load(QEMUFile *f, struct socket *so, int version_id) -{ - if (tcp_attach(so) < 0) - return -ENOMEM; - - so->so_urgc = qemu_get_be32(f); - if (version_id <= 3) { - so->so_ffamily = AF_INET; - so->so_faddr.s_addr = qemu_get_be32(f); - so->so_laddr.s_addr = qemu_get_be32(f); - so->so_fport = qemu_get_be16(f); - so->so_lport = qemu_get_be16(f); - } else { - so->so_ffamily = qemu_get_be16(f); - switch (so->so_ffamily) { - case AF_INET: - so->so_faddr.s_addr = qemu_get_be32(f); - so->so_fport = qemu_get_be16(f); - break; - default: - error_report( - "so_ffamily unknown, unable to restore so_faddr and so_lport"); - } - so->so_lfamily = qemu_get_be16(f); - switch (so->so_lfamily) { - case AF_INET: - so->so_laddr.s_addr = qemu_get_be32(f); - so->so_lport = qemu_get_be16(f); - break; - default: - error_report( - "so_ffamily unknown, unable to restore so_laddr and so_lport"); - } - } - so->so_iptos = qemu_get_byte(f); - so->so_emu = qemu_get_byte(f); - so->so_type = qemu_get_byte(f); - so->so_state = qemu_get_be32(f); - if (slirp_sbuf_load(f, &so->so_rcv) < 0) - return -ENOMEM; - if (slirp_sbuf_load(f, &so->so_snd) < 0) - return -ENOMEM; - slirp_tcp_load(f, so->so_tcpcb); - - return 0; -} - -static void slirp_bootp_load(QEMUFile *f, Slirp *slirp) -{ - int i; - - for (i = 0; i < NB_BOOTP_CLIENTS; i++) { - slirp->bootp_clients[i].allocated = qemu_get_be16(f); - qemu_get_buffer(f, slirp->bootp_clients[i].macaddr, 6); - } -} - -static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) -{ - Slirp *slirp = opaque; - struct ex_list *ex_ptr; - - while (qemu_get_byte(f)) { - int ret; - struct socket *so = socreate(slirp); - - if (!so) - return -ENOMEM; - - ret = slirp_socket_load(f, so, version_id); - - if (ret < 0) - return ret; - - if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) != - slirp->vnetwork_addr.s_addr) { - return -EINVAL; - } - for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { - if (ex_ptr->ex_pty == 3 && - so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && - so->so_fport == ex_ptr->ex_fport) { - break; - } - } - if (!ex_ptr) - return -EINVAL; - - so->extra = (void *)ex_ptr->ex_exec; - } - - if (version_id >= 2) { - slirp->ip_id = qemu_get_be16(f); - } - - if (version_id >= 3) { - slirp_bootp_load(f, slirp); - } - - return 0; -} |