diff options
Diffstat (limited to 'qemu/net/socket.c')
| -rw-r--r-- | qemu/net/socket.c | 772 |
1 files changed, 0 insertions, 772 deletions
diff --git a/qemu/net/socket.c b/qemu/net/socket.c deleted file mode 100644 index 9fa2cd8d5..000000000 --- a/qemu/net/socket.c +++ /dev/null @@ -1,772 +0,0 @@ -/* - * 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 "qemu/osdep.h" - -#include "net/net.h" -#include "clients.h" -#include "monitor/monitor.h" -#include "qapi/error.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; - unsigned l; - uint8_t buf1[NET_BUFSIZE]; - const uint8_t *buf; - - size = qemu_recv(s->fd, buf1, sizeof(buf1), 0); - if (size < 0) { - if (errno != 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; - 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) { - if (errno == EINTR || errno == EWOULDBLOCK) { - /* continue */ - } else if (errno == EINPROGRESS || - errno == EALREADY || - errno == EINVAL) { - break; - } 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->type == NET_CLIENT_OPTIONS_KIND_SOCKET); - sock = opts->u.socket.data; - - 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; -} |