4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 #include "net/socket.h"
26 #include "config-host.h"
29 #include "qemu-char.h"
30 #include "qemu-common.h"
31 #include "qemu-option.h"
32 #include "qemu_socket.h"
35 typedef struct NetSocketState {
38 int state; /* 0 = getting length, 1 = getting data */
40 unsigned int packet_len;
42 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
45 typedef struct NetSocketListenState {
50 } NetSocketListenState;
52 /* XXX: we consider we can send the whole packet without blocking */
53 static ssize_t net_socket_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
55 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
59 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
60 return send_all(s->fd, buf, size);
63 static ssize_t net_socket_receive_dgram(VLANClientState *nc, const uint8_t *buf, size_t size)
65 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
67 return sendto(s->fd, (const void *)buf, size, 0,
68 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
71 static void net_socket_send(void *opaque)
73 NetSocketState *s = opaque;
79 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
82 if (err != EWOULDBLOCK)
84 } else if (size == 0) {
85 /* end of connection */
87 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
93 /* reassemble a packet from the network */
99 memcpy(s->buf + s->index, buf, l);
105 s->packet_len = ntohl(*(uint32_t *)s->buf);
111 l = s->packet_len - s->index;
114 if (s->index + l <= sizeof(s->buf)) {
115 memcpy(s->buf + s->index, buf, l);
117 fprintf(stderr, "serious error: oversized packet received,"
118 "connection terminated.\n");
126 if (s->index >= s->packet_len) {
127 qemu_send_packet(&s->nc, s->buf, s->packet_len);
136 static void net_socket_send_dgram(void *opaque)
138 NetSocketState *s = opaque;
141 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
145 /* end of connection */
146 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
149 qemu_send_packet(&s->nc, s->buf, size);
152 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
157 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
158 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
159 inet_ntoa(mcastaddr->sin_addr),
160 (int)ntohl(mcastaddr->sin_addr.s_addr));
164 fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
166 perror("socket(PF_INET, SOCK_DGRAM)");
171 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
172 (const char *)&val, sizeof(val));
174 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
178 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
184 /* Add host to multicast group */
185 imr.imr_multiaddr = mcastaddr->sin_addr;
186 imr.imr_interface.s_addr = htonl(INADDR_ANY);
188 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
189 (const char *)&imr, sizeof(struct ip_mreq));
191 perror("setsockopt(IP_ADD_MEMBERSHIP)");
195 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
197 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
198 (const char *)&val, sizeof(val));
200 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
204 socket_set_nonblock(fd);
212 static void net_socket_cleanup(VLANClientState *nc)
214 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
215 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
219 static NetClientInfo net_dgram_socket_info = {
220 .type = NET_CLIENT_TYPE_SOCKET,
221 .size = sizeof(NetSocketState),
222 .receive = net_socket_receive_dgram,
223 .cleanup = net_socket_cleanup,
226 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
229 int fd, int is_connected)
231 struct sockaddr_in saddr;
237 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
238 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
239 * by ONLY ONE process: we must "clone" this dgram socket --jjo
243 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
245 if (saddr.sin_addr.s_addr==0) {
246 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
250 /* clone dgram socket */
251 newfd = net_socket_mcast_create(&saddr);
253 /* error already reported by net_socket_mcast_create() */
257 /* clone newfd to fd, close newfd */
262 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
263 fd, strerror(errno));
268 nc = qemu_new_net_client(&net_dgram_socket_info, vlan, NULL, model, name);
270 snprintf(nc->info_str, sizeof(nc->info_str),
271 "socket: fd=%d (%s mcast=%s:%d)",
272 fd, is_connected ? "cloned" : "",
273 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
275 s = DO_UPCAST(NetSocketState, nc, nc);
279 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
281 /* mcast: save bound address as dst */
282 if (is_connected) s->dgram_dst=saddr;
287 static void net_socket_connect(void *opaque)
289 NetSocketState *s = opaque;
290 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
293 static NetClientInfo net_socket_info = {
294 .type = NET_CLIENT_TYPE_SOCKET,
295 .size = sizeof(NetSocketState),
296 .receive = net_socket_receive,
297 .cleanup = net_socket_cleanup,
300 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
303 int fd, int is_connected)
308 nc = qemu_new_net_client(&net_socket_info, vlan, NULL, model, name);
310 snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
312 s = DO_UPCAST(NetSocketState, nc, nc);
317 net_socket_connect(s);
319 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
324 static NetSocketState *net_socket_fd_init(VLANState *vlan,
325 const char *model, const char *name,
326 int fd, int is_connected)
328 int so_type = -1, optlen=sizeof(so_type);
330 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
331 (socklen_t *)&optlen)< 0) {
332 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
337 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
339 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
341 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
342 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
343 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
348 static void net_socket_accept(void *opaque)
350 NetSocketListenState *s = opaque;
352 struct sockaddr_in saddr;
358 fd = qemu_accept(s->fd, (struct sockaddr *)&saddr, &len);
359 if (fd < 0 && errno != EINTR) {
361 } else if (fd >= 0) {
365 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
369 snprintf(s1->nc.info_str, sizeof(s1->nc.info_str),
370 "socket: connection from %s:%d",
371 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
375 static int net_socket_listen_init(VLANState *vlan,
378 const char *host_str)
380 NetSocketListenState *s;
382 struct sockaddr_in saddr;
384 if (parse_host_port(&saddr, host_str) < 0)
387 s = qemu_mallocz(sizeof(NetSocketListenState));
389 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
394 socket_set_nonblock(fd);
396 /* allow fast reuse */
398 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
400 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
411 s->model = qemu_strdup(model);
412 s->name = name ? qemu_strdup(name) : NULL;
414 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
418 static int net_socket_connect_init(VLANState *vlan,
421 const char *host_str)
424 int fd, connected, ret, err;
425 struct sockaddr_in saddr;
427 if (parse_host_port(&saddr, host_str) < 0)
430 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
435 socket_set_nonblock(fd);
439 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
441 err = socket_error();
442 if (err == EINTR || err == EWOULDBLOCK) {
443 } else if (err == EINPROGRESS) {
446 } else if (err == WSAEALREADY) {
459 s = net_socket_fd_init(vlan, model, name, fd, connected);
462 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
463 "socket: connect to %s:%d",
464 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
468 static int net_socket_mcast_init(VLANState *vlan,
471 const char *host_str)
475 struct sockaddr_in saddr;
477 if (parse_host_port(&saddr, host_str) < 0)
481 fd = net_socket_mcast_create(&saddr);
485 s = net_socket_fd_init(vlan, model, name, fd, 0);
489 s->dgram_dst = saddr;
491 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
492 "socket: mcast=%s:%d",
493 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
498 int net_init_socket(QemuOpts *opts,
503 if (qemu_opt_get(opts, "fd")) {
506 if (qemu_opt_get(opts, "listen") ||
507 qemu_opt_get(opts, "connect") ||
508 qemu_opt_get(opts, "mcast")) {
509 qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
513 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
518 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
522 } else if (qemu_opt_get(opts, "listen")) {
525 if (qemu_opt_get(opts, "fd") ||
526 qemu_opt_get(opts, "connect") ||
527 qemu_opt_get(opts, "mcast")) {
528 qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
532 listen = qemu_opt_get(opts, "listen");
534 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
537 } else if (qemu_opt_get(opts, "connect")) {
540 if (qemu_opt_get(opts, "fd") ||
541 qemu_opt_get(opts, "listen") ||
542 qemu_opt_get(opts, "mcast")) {
543 qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
547 connect = qemu_opt_get(opts, "connect");
549 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
552 } else if (qemu_opt_get(opts, "mcast")) {
555 if (qemu_opt_get(opts, "fd") ||
556 qemu_opt_get(opts, "connect") ||
557 qemu_opt_get(opts, "listen")) {
558 qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
562 mcast = qemu_opt_get(opts, "mcast");
564 if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
568 qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
573 vlan->nb_host_devs++;