blob: dcae1ae2c06384e4acce7907f0c6b5a5d97080dd [file] [log] [blame]
Mark McLoughlin42281ac2009-11-25 18:48:56 +00001/*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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
22 * THE SOFTWARE.
23 */
Peter Maydell2744d922016-01-29 17:50:00 +000024#include "qemu/osdep.h"
Mark McLoughlin42281ac2009-11-25 18:48:56 +000025
Paolo Bonzini1422e322012-10-24 08:43:34 +020026#include "net/net.h"
Paolo Bonzinia245fc12012-09-17 18:43:51 +020027#include "clients.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010028#include "monitor/monitor.h"
Markus Armbrusterda34e652016-03-14 09:01:28 +010029#include "qapi/error.h"
Mark McLoughlin42281ac2009-11-25 18:48:56 +000030#include "qemu-common.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010031#include "qemu/error-report.h"
32#include "qemu/option.h"
33#include "qemu/sockets.h"
34#include "qemu/iov.h"
Alex Bligh6a1751b2013-08-21 16:02:47 +010035#include "qemu/main-loop.h"
Mark McLoughlin42281ac2009-11-25 18:48:56 +000036
37typedef struct NetSocketState {
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +010038 NetClientState nc;
Zhi Yong Wu011de2b2012-07-20 14:25:53 +010039 int listen_fd;
Mark McLoughlin42281ac2009-11-25 18:48:56 +000040 int fd;
Zhang Chen16a3df42016-05-13 15:35:19 +080041 SocketReadState rs;
Stefan Hajnoczi45a7f542012-08-20 10:14:35 +010042 unsigned int send_index; /* number of bytes sent (only SOCK_STREAM) */
Mark McLoughlin42281ac2009-11-25 18:48:56 +000043 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
Stefan Hajnoczi863f6782012-08-20 10:21:54 +010044 IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
45 bool read_poll; /* waiting to receive data? */
46 bool write_poll; /* waiting to transmit data? */
Mark McLoughlin42281ac2009-11-25 18:48:56 +000047} NetSocketState;
48
Zhi Yong Wu011de2b2012-07-20 14:25:53 +010049static void net_socket_accept(void *opaque);
Stefan Hajnoczi863f6782012-08-20 10:21:54 +010050static void net_socket_writable(void *opaque);
51
Stefan Hajnoczi863f6782012-08-20 10:21:54 +010052static void net_socket_update_fd_handler(NetSocketState *s)
53{
Fam Zheng82e1cc42015-06-04 14:45:18 +080054 qemu_set_fd_handler(s->fd,
55 s->read_poll ? s->send_fn : NULL,
56 s->write_poll ? net_socket_writable : NULL,
57 s);
Stefan Hajnoczi863f6782012-08-20 10:21:54 +010058}
59
60static void net_socket_read_poll(NetSocketState *s, bool enable)
61{
62 s->read_poll = enable;
63 net_socket_update_fd_handler(s);
64}
65
66static void net_socket_write_poll(NetSocketState *s, bool enable)
67{
68 s->write_poll = enable;
69 net_socket_update_fd_handler(s);
70}
71
72static void net_socket_writable(void *opaque)
73{
74 NetSocketState *s = opaque;
75
76 net_socket_write_poll(s, false);
77
78 qemu_flush_queued_packets(&s->nc);
79}
Mark McLoughlin42281ac2009-11-25 18:48:56 +000080
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +010081static ssize_t net_socket_receive(NetClientState *nc, const uint8_t *buf, size_t size)
Mark McLoughlin42281ac2009-11-25 18:48:56 +000082{
Mark McLoughlin564f63e2009-11-25 18:49:08 +000083 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
Stefan Hajnoczi45a7f542012-08-20 10:14:35 +010084 uint32_t len = htonl(size);
85 struct iovec iov[] = {
86 {
87 .iov_base = &len,
88 .iov_len = sizeof(len),
89 }, {
90 .iov_base = (void *)buf,
91 .iov_len = size,
92 },
93 };
94 size_t remaining;
95 ssize_t ret;
Mark McLoughlin42281ac2009-11-25 18:48:56 +000096
Stefan Hajnoczi45a7f542012-08-20 10:14:35 +010097 remaining = iov_size(iov, 2) - s->send_index;
98 ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
99
100 if (ret == -1 && errno == EAGAIN) {
101 ret = 0; /* handled further down */
102 }
103 if (ret == -1) {
104 s->send_index = 0;
105 return -errno;
106 }
107 if (ret < (ssize_t)remaining) {
108 s->send_index += ret;
109 net_socket_write_poll(s, true);
110 return 0;
111 }
112 s->send_index = 0;
113 return size;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000114}
115
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100116static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf, size_t size)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000117{
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000118 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
Stefan Hajnoczi213fd502012-08-20 10:28:53 +0100119 ssize_t ret;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000120
Stefan Hajnoczi213fd502012-08-20 10:28:53 +0100121 do {
Stefan Weil73062df2012-09-22 21:13:28 +0200122 ret = qemu_sendto(s->fd, buf, size, 0,
123 (struct sockaddr *)&s->dgram_dst,
124 sizeof(s->dgram_dst));
Stefan Hajnoczi213fd502012-08-20 10:28:53 +0100125 } while (ret == -1 && errno == EINTR);
126
127 if (ret == -1 && errno == EAGAIN) {
128 net_socket_write_poll(s, true);
129 return 0;
130 }
131 return ret;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000132}
133
Fam Zheng6e99c632015-06-04 14:45:16 +0800134static void net_socket_send_completed(NetClientState *nc, ssize_t len)
135{
136 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
137
138 if (!s->read_poll) {
139 net_socket_read_poll(s, true);
140 }
141}
142
Zhang Chen16a3df42016-05-13 15:35:19 +0800143static void net_socket_rs_finalize(SocketReadState *rs)
144{
145 NetSocketState *s = container_of(rs, NetSocketState, rs);
146
147 if (qemu_send_packet_async(&s->nc, rs->buf,
148 rs->packet_len,
149 net_socket_send_completed) == 0) {
150 net_socket_read_poll(s, false);
151 }
152}
153
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000154static void net_socket_send(void *opaque)
155{
156 NetSocketState *s = opaque;
Daniel P. Berrangeb16a44e2016-03-07 20:36:03 +0000157 int size;
Zhang Chen16a3df42016-05-13 15:35:19 +0800158 int ret;
Scott Feldmand32fcad2013-03-18 11:43:44 -0700159 uint8_t buf1[NET_BUFSIZE];
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000160 const uint8_t *buf;
161
Blue Swirl00aa0042011-07-23 20:04:29 +0000162 size = qemu_recv(s->fd, buf1, sizeof(buf1), 0);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000163 if (size < 0) {
Daniel P. Berrangeb16a44e2016-03-07 20:36:03 +0000164 if (errno != EWOULDBLOCK)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000165 goto eoc;
166 } else if (size == 0) {
167 /* end of connection */
168 eoc:
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100169 net_socket_read_poll(s, false);
170 net_socket_write_poll(s, false);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100171 if (s->listen_fd != -1) {
172 qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
173 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000174 closesocket(s->fd);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100175
176 s->fd = -1;
Zhang Chen16a3df42016-05-13 15:35:19 +0800177 net_socket_rs_init(&s->rs, net_socket_rs_finalize);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100178 s->nc.link_down = true;
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100179 memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
180
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000181 return;
182 }
183 buf = buf1;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000184
Zhang Chen16a3df42016-05-13 15:35:19 +0800185 ret = net_fill_rstate(&s->rs, buf, size);
186
187 if (ret == -1) {
188 goto eoc;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000189 }
190}
191
192static void net_socket_send_dgram(void *opaque)
193{
194 NetSocketState *s = opaque;
195 int size;
196
Zhang Chen16a3df42016-05-13 15:35:19 +0800197 size = qemu_recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000198 if (size < 0)
199 return;
200 if (size == 0) {
201 /* end of connection */
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100202 net_socket_read_poll(s, false);
203 net_socket_write_poll(s, false);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000204 return;
205 }
Zhang Chen16a3df42016-05-13 15:35:19 +0800206 if (qemu_send_packet_async(&s->nc, s->rs.buf, size,
Fam Zheng6e99c632015-06-04 14:45:16 +0800207 net_socket_send_completed) == 0) {
208 net_socket_read_poll(s, false);
209 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000210}
211
Mike Ryan3a75e742010-12-01 11:16:47 -0800212static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr *localaddr)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000213{
214 struct ip_mreq imr;
215 int fd;
216 int val, ret;
Brad23ddf2b2011-08-07 11:06:43 +0000217#ifdef __OpenBSD__
218 unsigned char loop;
219#else
220 int loop;
221#endif
222
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000223 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000224 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) "
225 "does not contain a multicast address\n",
226 inet_ntoa(mcastaddr->sin_addr),
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000227 (int)ntohl(mcastaddr->sin_addr.s_addr));
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000228 return -1;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000229
230 }
Kevin Wolf40ff6d72009-12-02 12:24:42 +0100231 fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000232 if (fd < 0) {
233 perror("socket(PF_INET, SOCK_DGRAM)");
234 return -1;
235 }
236
Sebastian Ottlikbcbe92f2013-10-02 12:23:14 +0200237 /* Allow multiple sockets to bind the same multicast ip and port by setting
238 * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set
239 * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR
240 * only on posix systems.
241 */
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000242 val = 1;
Stefan Weil9957fc72013-03-08 19:58:32 +0100243 ret = qemu_setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000244 if (ret < 0) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000245 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
246 goto fail;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000247 }
248
249 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
250 if (ret < 0) {
251 perror("bind");
252 goto fail;
253 }
254
255 /* Add host to multicast group */
256 imr.imr_multiaddr = mcastaddr->sin_addr;
Mike Ryan3a75e742010-12-01 11:16:47 -0800257 if (localaddr) {
258 imr.imr_interface = *localaddr;
259 } else {
260 imr.imr_interface.s_addr = htonl(INADDR_ANY);
261 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000262
Stefan Weil9957fc72013-03-08 19:58:32 +0100263 ret = qemu_setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
264 &imr, sizeof(struct ip_mreq));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000265 if (ret < 0) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000266 perror("setsockopt(IP_ADD_MEMBERSHIP)");
267 goto fail;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000268 }
269
270 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
Brad23ddf2b2011-08-07 11:06:43 +0000271 loop = 1;
Stefan Weil9957fc72013-03-08 19:58:32 +0100272 ret = qemu_setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
273 &loop, sizeof(loop));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000274 if (ret < 0) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000275 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
276 goto fail;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000277 }
278
Mike Ryan3a75e742010-12-01 11:16:47 -0800279 /* If a bind address is given, only send packets from that address */
280 if (localaddr != NULL) {
Stefan Weil9957fc72013-03-08 19:58:32 +0100281 ret = qemu_setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
282 localaddr, sizeof(*localaddr));
Mike Ryan3a75e742010-12-01 11:16:47 -0800283 if (ret < 0) {
284 perror("setsockopt(IP_MULTICAST_IF)");
285 goto fail;
286 }
287 }
288
Stefan Hajnoczif9e8cac2013-03-27 10:10:43 +0100289 qemu_set_nonblock(fd);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000290 return fd;
291fail:
292 if (fd >= 0)
293 closesocket(fd);
294 return -1;
295}
296
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100297static void net_socket_cleanup(NetClientState *nc)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000298{
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000299 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100300 if (s->fd != -1) {
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100301 net_socket_read_poll(s, false);
302 net_socket_write_poll(s, false);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100303 close(s->fd);
304 s->fd = -1;
305 }
306 if (s->listen_fd != -1) {
307 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
308 closesocket(s->listen_fd);
309 s->listen_fd = -1;
310 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000311}
312
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000313static NetClientInfo net_dgram_socket_info = {
Eric Blakef394b2e2016-07-13 21:50:23 -0600314 .type = NET_CLIENT_DRIVER_SOCKET,
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000315 .size = sizeof(NetSocketState),
316 .receive = net_socket_receive_dgram,
317 .cleanup = net_socket_cleanup,
318};
319
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100320static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000321 const char *model,
322 const char *name,
323 int fd, int is_connected)
324{
325 struct sockaddr_in saddr;
326 int newfd;
zhanghailianged6273e2014-11-17 13:54:05 +0800327 socklen_t saddr_len = sizeof(saddr);
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100328 NetClientState *nc;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000329 NetSocketState *s;
330
331 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
332 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
333 * by ONLY ONE process: we must "clone" this dgram socket --jjo
334 */
335
336 if (is_connected) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000337 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
338 /* must be bound */
339 if (saddr.sin_addr.s_addr == 0) {
340 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, "
341 "cannot setup multicast dst addr\n", fd);
Stefan Hajnoczie5d1fca2011-12-07 15:01:49 +0000342 goto err;
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000343 }
344 /* clone dgram socket */
345 newfd = net_socket_mcast_create(&saddr, NULL);
346 if (newfd < 0) {
347 /* error already reported by net_socket_mcast_create() */
Stefan Hajnoczie5d1fca2011-12-07 15:01:49 +0000348 goto err;
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000349 }
350 /* clone newfd to fd, close newfd */
351 dup2(newfd, fd);
352 close(newfd);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000353
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000354 } else {
355 fprintf(stderr,
356 "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
357 fd, strerror(errno));
Stefan Hajnoczie5d1fca2011-12-07 15:01:49 +0000358 goto err;
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000359 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000360 }
361
Stefan Hajnocziab5f3f82012-07-24 16:35:08 +0100362 nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000363
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000364 s = DO_UPCAST(NetSocketState, nc, nc);
365
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000366 s->fd = fd;
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100367 s->listen_fd = -1;
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100368 s->send_fn = net_socket_send_dgram;
Zhang Chen16a3df42016-05-13 15:35:19 +0800369 net_socket_rs_init(&s->rs, net_socket_rs_finalize);
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100370 net_socket_read_poll(s, true);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000371
372 /* mcast: save bound address as dst */
Zhi Yong Wue34cde32012-07-20 14:25:52 +0100373 if (is_connected) {
374 s->dgram_dst = saddr;
Gonglei8db804a2014-11-20 19:35:01 +0800375 snprintf(nc->info_str, sizeof(nc->info_str),
376 "socket: fd=%d (cloned mcast=%s:%d)",
377 fd, inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
378 } else {
379 snprintf(nc->info_str, sizeof(nc->info_str),
380 "socket: fd=%d", fd);
Zhi Yong Wue34cde32012-07-20 14:25:52 +0100381 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000382
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000383 return s;
Stefan Hajnoczie5d1fca2011-12-07 15:01:49 +0000384
385err:
386 closesocket(fd);
387 return NULL;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000388}
389
390static void net_socket_connect(void *opaque)
391{
392 NetSocketState *s = opaque;
Stefan Hajnoczi863f6782012-08-20 10:21:54 +0100393 s->send_fn = net_socket_send;
394 net_socket_read_poll(s, true);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000395}
396
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000397static NetClientInfo net_socket_info = {
Eric Blakef394b2e2016-07-13 21:50:23 -0600398 .type = NET_CLIENT_DRIVER_SOCKET,
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000399 .size = sizeof(NetSocketState),
400 .receive = net_socket_receive,
401 .cleanup = net_socket_cleanup,
402};
403
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100404static NetSocketState *net_socket_fd_init_stream(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000405 const char *model,
406 const char *name,
407 int fd, int is_connected)
408{
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100409 NetClientState *nc;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000410 NetSocketState *s;
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000411
Stefan Hajnocziab5f3f82012-07-24 16:35:08 +0100412 nc = qemu_new_net_client(&net_socket_info, peer, model, name);
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000413
414 snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
415
416 s = DO_UPCAST(NetSocketState, nc, nc);
417
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000418 s->fd = fd;
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100419 s->listen_fd = -1;
Zhang Chen16a3df42016-05-13 15:35:19 +0800420 net_socket_rs_init(&s->rs, net_socket_rs_finalize);
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000421
Stefan Hajnoczi20048d02013-02-27 15:05:47 +0100422 /* Disable Nagle algorithm on TCP sockets to reduce latency */
423 socket_set_nodelay(fd);
424
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000425 if (is_connected) {
426 net_socket_connect(s);
427 } else {
428 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
429 }
430 return s;
431}
432
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100433static NetSocketState *net_socket_fd_init(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000434 const char *model, const char *name,
435 int fd, int is_connected)
436{
437 int so_type = -1, optlen=sizeof(so_type);
438
439 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
440 (socklen_t *)&optlen)< 0) {
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000441 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n",
442 fd);
Stefan Hajnoczie5d1fca2011-12-07 15:01:49 +0000443 closesocket(fd);
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000444 return NULL;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000445 }
446 switch(so_type) {
447 case SOCK_DGRAM:
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100448 return net_socket_fd_init_dgram(peer, model, name, fd, is_connected);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000449 case SOCK_STREAM:
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100450 return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000451 default:
452 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
453 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100454 return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000455 }
456 return NULL;
457}
458
459static void net_socket_accept(void *opaque)
460{
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100461 NetSocketState *s = opaque;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000462 struct sockaddr_in saddr;
463 socklen_t len;
464 int fd;
465
466 for(;;) {
467 len = sizeof(saddr);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100468 fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000469 if (fd < 0 && errno != EINTR) {
470 return;
471 } else if (fd >= 0) {
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100472 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000473 break;
474 }
475 }
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100476
477 s->fd = fd;
478 s->nc.link_down = false;
479 net_socket_connect(s);
480 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
481 "socket: connection from %s:%d",
482 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000483}
484
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100485static int net_socket_listen_init(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000486 const char *model,
487 const char *name,
488 const char *host_str)
489{
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100490 NetClientState *nc;
491 NetSocketState *s;
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100492 struct sockaddr_in saddr;
493 int fd, ret;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000494
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100495 if (parse_host_port(&saddr, host_str) < 0)
496 return -1;
497
498 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
499 if (fd < 0) {
500 perror("socket");
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000501 return -1;
502 }
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100503 qemu_set_nonblock(fd);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000504
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100505 socket_set_fast_reuse(fd);
506
507 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000508 if (ret < 0) {
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100509 perror("bind");
510 closesocket(fd);
511 return -1;
512 }
513 ret = listen(fd, 0);
514 if (ret < 0) {
515 perror("listen");
516 closesocket(fd);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000517 return -1;
518 }
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100519
520 nc = qemu_new_net_client(&net_socket_info, peer, model, name);
521 s = DO_UPCAST(NetSocketState, nc, nc);
522 s->fd = -1;
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100523 s->listen_fd = fd;
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100524 s->nc.link_down = true;
Daniel P. Berrangee79cd402016-11-04 15:46:33 +0000525 net_socket_rs_init(&s->rs, net_socket_rs_finalize);
Zhi Yong Wu011de2b2012-07-20 14:25:53 +0100526
527 qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000528 return 0;
529}
530
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100531static int net_socket_connect_init(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000532 const char *model,
533 const char *name,
534 const char *host_str)
535{
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100536 NetSocketState *s;
537 int fd, connected, ret;
538 struct sockaddr_in saddr;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000539
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100540 if (parse_host_port(&saddr, host_str) < 0)
541 return -1;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000542
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100543 fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000544 if (fd < 0) {
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100545 perror("socket");
546 return -1;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000547 }
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100548 qemu_set_nonblock(fd);
Paolo Bonzini61601832016-08-30 14:04:12 +0200549
Daniel P. Berrange6701e552017-05-05 17:23:05 +0100550 connected = 0;
551 for(;;) {
552 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
553 if (ret < 0) {
554 if (errno == EINTR || errno == EWOULDBLOCK) {
555 /* continue */
556 } else if (errno == EINPROGRESS ||
557 errno == EALREADY ||
558 errno == EINVAL) {
559 break;
560 } else {
561 perror("connect");
562 closesocket(fd);
563 return -1;
564 }
565 } else {
566 connected = 1;
567 break;
568 }
569 }
570 s = net_socket_fd_init(peer, model, name, fd, connected);
571 if (!s)
572 return -1;
573 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
574 "socket: connect to %s:%d",
575 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000576 return 0;
577}
578
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100579static int net_socket_mcast_init(NetClientState *peer,
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000580 const char *model,
581 const char *name,
Mike Ryan3a75e742010-12-01 11:16:47 -0800582 const char *host_str,
583 const char *localaddr_str)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000584{
585 NetSocketState *s;
586 int fd;
587 struct sockaddr_in saddr;
Mike Ryan3a75e742010-12-01 11:16:47 -0800588 struct in_addr localaddr, *param_localaddr;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000589
590 if (parse_host_port(&saddr, host_str) < 0)
591 return -1;
592
Mike Ryan3a75e742010-12-01 11:16:47 -0800593 if (localaddr_str != NULL) {
594 if (inet_aton(localaddr_str, &localaddr) == 0)
595 return -1;
596 param_localaddr = &localaddr;
597 } else {
598 param_localaddr = NULL;
599 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000600
Mike Ryan3a75e742010-12-01 11:16:47 -0800601 fd = net_socket_mcast_create(&saddr, param_localaddr);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000602 if (fd < 0)
Stefan Hajnoczi842480d2011-12-07 15:01:48 +0000603 return -1;
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000604
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100605 s = net_socket_fd_init(peer, model, name, fd, 0);
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000606 if (!s)
607 return -1;
608
609 s->dgram_dst = saddr;
610
Mark McLoughlin564f63e2009-11-25 18:49:08 +0000611 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000612 "socket: mcast=%s:%d",
613 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
614 return 0;
615
616}
617
Stefan Hajnoczi4e68f7a2012-07-24 16:35:13 +0100618static int net_socket_udp_init(NetClientState *peer,
Benjamin0e0e7fa2012-01-11 09:20:54 +0900619 const char *model,
620 const char *name,
621 const char *rhost,
622 const char *lhost)
623{
624 NetSocketState *s;
Sebastian Ottlikbcbe92f2013-10-02 12:23:14 +0200625 int fd, ret;
Benjamin0e0e7fa2012-01-11 09:20:54 +0900626 struct sockaddr_in laddr, raddr;
627
628 if (parse_host_port(&laddr, lhost) < 0) {
629 return -1;
630 }
631
632 if (parse_host_port(&raddr, rhost) < 0) {
633 return -1;
634 }
635
636 fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
637 if (fd < 0) {
638 perror("socket(PF_INET, SOCK_DGRAM)");
639 return -1;
640 }
Sebastian Ottlikbcbe92f2013-10-02 12:23:14 +0200641
642 ret = socket_set_fast_reuse(fd);
Benjamin0e0e7fa2012-01-11 09:20:54 +0900643 if (ret < 0) {
Benjamin0e0e7fa2012-01-11 09:20:54 +0900644 closesocket(fd);
645 return -1;
646 }
647 ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr));
648 if (ret < 0) {
649 perror("bind");
650 closesocket(fd);
651 return -1;
652 }
Stefan Hajnoczifc13fa02013-03-27 10:10:44 +0100653 qemu_set_nonblock(fd);
Benjamin0e0e7fa2012-01-11 09:20:54 +0900654
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100655 s = net_socket_fd_init(peer, model, name, fd, 0);
Benjamin0e0e7fa2012-01-11 09:20:54 +0900656 if (!s) {
657 return -1;
658 }
659
660 s->dgram_dst = raddr;
661
662 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
663 "socket: udp=%s:%d",
664 inet_ntoa(raddr.sin_addr), ntohs(raddr.sin_port));
665 return 0;
666}
667
Kővágó, Zoltáncebea512016-07-13 21:50:12 -0600668int net_init_socket(const Netdev *netdev, const char *name,
Markus Armbrustera30ecde2015-05-15 13:58:50 +0200669 NetClientState *peer, Error **errp)
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000670{
Markus Armbrustera30ecde2015-05-15 13:58:50 +0200671 /* FIXME error_setg(errp, ...) on failure */
Markus Armbruster1677f4c2015-02-09 14:03:19 +0100672 Error *err = NULL;
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200673 const NetdevSocketOptions *sock;
674
Eric Blakef394b2e2016-07-13 21:50:23 -0600675 assert(netdev->type == NET_CLIENT_DRIVER_SOCKET);
676 sock = &netdev->u.socket;
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200677
678 if (sock->has_fd + sock->has_listen + sock->has_connect + sock->has_mcast +
679 sock->has_udp != 1) {
680 error_report("exactly one of fd=, listen=, connect=, mcast= or udp="
681 " is required");
682 return -1;
683 }
684
685 if (sock->has_localaddr && !sock->has_mcast && !sock->has_udp) {
686 error_report("localaddr= is only valid with mcast= or udp=");
687 return -1;
688 }
689
690 if (sock->has_fd) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000691 int fd;
692
Markus Armbruster1677f4c2015-02-09 14:03:19 +0100693 fd = monitor_fd_param(cur_mon, sock->fd, &err);
Stefan Hajnoczifc13fa02013-03-27 10:10:44 +0100694 if (fd == -1) {
Markus Armbruster1677f4c2015-02-09 14:03:19 +0100695 error_report_err(err);
Stefan Hajnoczifc13fa02013-03-27 10:10:44 +0100696 return -1;
697 }
698 qemu_set_nonblock(fd);
699 if (!net_socket_fd_init(peer, "socket", name, fd, 1)) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000700 return -1;
701 }
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200702 return 0;
703 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000704
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200705 if (sock->has_listen) {
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100706 if (net_socket_listen_init(peer, "socket", name, sock->listen) == -1) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000707 return -1;
708 }
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200709 return 0;
710 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000711
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200712 if (sock->has_connect) {
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100713 if (net_socket_connect_init(peer, "socket", name, sock->connect) ==
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200714 -1) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000715 return -1;
716 }
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200717 return 0;
718 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000719
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200720 if (sock->has_mcast) {
721 /* if sock->localaddr is missing, it has been initialized to "all bits
722 * zero" */
Stefan Hajnoczid33d93b2012-07-24 16:35:05 +0100723 if (net_socket_mcast_init(peer, "socket", name, sock->mcast,
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200724 sock->localaddr) == -1) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000725 return -1;
726 }
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200727 return 0;
728 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000729
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200730 assert(sock->has_udp);
731 if (!sock->has_localaddr) {
732 error_report("localaddr= is mandatory with udp=");
733 return -1;
734 }
Lei Lif0e3ac72012-11-01 17:39:55 +0800735 if (net_socket_udp_init(peer, "socket", name, sock->udp, sock->localaddr) ==
Laszlo Ersekbef8e8f2012-07-17 16:17:17 +0200736 -1) {
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000737 return -1;
738 }
Mark McLoughlin42281ac2009-11-25 18:48:56 +0000739 return 0;
740}