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-error.h"
32 #include "qemu-option.h"
33 #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 = qemu_recv(s->fd, 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 = qemu_recv(s->fd, 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, struct in_addr *localaddr)
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;
187 imr.imr_interface = *localaddr;
189 imr.imr_interface.s_addr = htonl(INADDR_ANY);
192 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
193 (const char *)&imr, sizeof(struct ip_mreq));
195 perror("setsockopt(IP_ADD_MEMBERSHIP)");
199 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
201 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
202 (const char *)&val, sizeof(val));
204 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
208 /* If a bind address is given, only send packets from that address */
209 if (localaddr != NULL) {
210 ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
211 (const char *)localaddr, sizeof(*localaddr));
213 perror("setsockopt(IP_MULTICAST_IF)");
218 socket_set_nonblock(fd);
226 static void net_socket_cleanup(VLANClientState *nc)
228 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
229 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
233 static NetClientInfo net_dgram_socket_info = {
234 .type = NET_CLIENT_TYPE_SOCKET,
235 .size = sizeof(NetSocketState),
236 .receive = net_socket_receive_dgram,
237 .cleanup = net_socket_cleanup,
240 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
243 int fd, int is_connected)
245 struct sockaddr_in saddr;
251 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
252 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
253 * by ONLY ONE process: we must "clone" this dgram socket --jjo
257 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
259 if (saddr.sin_addr.s_addr==0) {
260 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
264 /* clone dgram socket */
265 newfd = net_socket_mcast_create(&saddr, NULL);
267 /* error already reported by net_socket_mcast_create() */
271 /* clone newfd to fd, close newfd */
276 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
277 fd, strerror(errno));
282 nc = qemu_new_net_client(&net_dgram_socket_info, vlan, NULL, model, name);
284 snprintf(nc->info_str, sizeof(nc->info_str),
285 "socket: fd=%d (%s mcast=%s:%d)",
286 fd, is_connected ? "cloned" : "",
287 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
289 s = DO_UPCAST(NetSocketState, nc, nc);
293 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
295 /* mcast: save bound address as dst */
296 if (is_connected) s->dgram_dst=saddr;
301 static void net_socket_connect(void *opaque)
303 NetSocketState *s = opaque;
304 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
307 static NetClientInfo net_socket_info = {
308 .type = NET_CLIENT_TYPE_SOCKET,
309 .size = sizeof(NetSocketState),
310 .receive = net_socket_receive,
311 .cleanup = net_socket_cleanup,
314 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
317 int fd, int is_connected)
322 nc = qemu_new_net_client(&net_socket_info, vlan, NULL, model, name);
324 snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
326 s = DO_UPCAST(NetSocketState, nc, nc);
331 net_socket_connect(s);
333 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
338 static NetSocketState *net_socket_fd_init(VLANState *vlan,
339 const char *model, const char *name,
340 int fd, int is_connected)
342 int so_type = -1, optlen=sizeof(so_type);
344 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
345 (socklen_t *)&optlen)< 0) {
346 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
351 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
353 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
355 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
356 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
357 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
362 static void net_socket_accept(void *opaque)
364 NetSocketListenState *s = opaque;
366 struct sockaddr_in saddr;
372 fd = qemu_accept(s->fd, (struct sockaddr *)&saddr, &len);
373 if (fd < 0 && errno != EINTR) {
375 } else if (fd >= 0) {
379 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
383 snprintf(s1->nc.info_str, sizeof(s1->nc.info_str),
384 "socket: connection from %s:%d",
385 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
389 static int net_socket_listen_init(VLANState *vlan,
392 const char *host_str)
394 NetSocketListenState *s;
396 struct sockaddr_in saddr;
398 if (parse_host_port(&saddr, host_str) < 0)
401 s = qemu_mallocz(sizeof(NetSocketListenState));
403 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
408 socket_set_nonblock(fd);
410 /* allow fast reuse */
412 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
414 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
425 s->model = qemu_strdup(model);
426 s->name = name ? qemu_strdup(name) : NULL;
428 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
432 static int net_socket_connect_init(VLANState *vlan,
435 const char *host_str)
438 int fd, connected, ret, err;
439 struct sockaddr_in saddr;
441 if (parse_host_port(&saddr, host_str) < 0)
444 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
449 socket_set_nonblock(fd);
453 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
455 err = socket_error();
456 if (err == EINTR || err == EWOULDBLOCK) {
457 } else if (err == EINPROGRESS) {
460 } else if (err == WSAEALREADY || err == WSAEINVAL) {
473 s = net_socket_fd_init(vlan, model, name, fd, connected);
476 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
477 "socket: connect to %s:%d",
478 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
482 static int net_socket_mcast_init(VLANState *vlan,
485 const char *host_str,
486 const char *localaddr_str)
490 struct sockaddr_in saddr;
491 struct in_addr localaddr, *param_localaddr;
493 if (parse_host_port(&saddr, host_str) < 0)
496 if (localaddr_str != NULL) {
497 if (inet_aton(localaddr_str, &localaddr) == 0)
499 param_localaddr = &localaddr;
501 param_localaddr = NULL;
504 fd = net_socket_mcast_create(&saddr, param_localaddr);
508 s = net_socket_fd_init(vlan, model, name, fd, 0);
512 s->dgram_dst = saddr;
514 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
515 "socket: mcast=%s:%d",
516 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
521 int net_init_socket(QemuOpts *opts,
526 if (qemu_opt_get(opts, "fd")) {
529 if (qemu_opt_get(opts, "listen") ||
530 qemu_opt_get(opts, "connect") ||
531 qemu_opt_get(opts, "mcast") ||
532 qemu_opt_get(opts, "localaddr")) {
533 error_report("listen=, connect=, mcast= and localaddr= is invalid with fd=");
537 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
542 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
546 } else if (qemu_opt_get(opts, "listen")) {
549 if (qemu_opt_get(opts, "fd") ||
550 qemu_opt_get(opts, "connect") ||
551 qemu_opt_get(opts, "mcast") ||
552 qemu_opt_get(opts, "localaddr")) {
553 error_report("fd=, connect=, mcast= and localaddr= is invalid with listen=");
557 listen = qemu_opt_get(opts, "listen");
559 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
562 } else if (qemu_opt_get(opts, "connect")) {
565 if (qemu_opt_get(opts, "fd") ||
566 qemu_opt_get(opts, "listen") ||
567 qemu_opt_get(opts, "mcast") ||
568 qemu_opt_get(opts, "localaddr")) {
569 error_report("fd=, listen=, mcast= and localaddr= is invalid with connect=");
573 connect = qemu_opt_get(opts, "connect");
575 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
578 } else if (qemu_opt_get(opts, "mcast")) {
579 const char *mcast, *localaddr;
581 if (qemu_opt_get(opts, "fd") ||
582 qemu_opt_get(opts, "connect") ||
583 qemu_opt_get(opts, "listen")) {
584 error_report("fd=, connect= and listen= is invalid with mcast=");
588 mcast = qemu_opt_get(opts, "mcast");
589 localaddr = qemu_opt_get(opts, "localaddr");
591 if (net_socket_mcast_init(vlan, "socket", name, mcast, localaddr) == -1) {
595 error_report("-socket requires fd=, listen=, connect= or mcast=");