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Commit | Line | Data |
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305b0eb2 AL |
1 | /* |
2 | * inet and unix socket functions for qemu | |
3 | * | |
4 | * (c) 2008 Gerd Hoffmann <kraxel@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; under version 2 of the License. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
e6d91ab6 PB |
14 | * |
15 | * Contributions after 2012-01-13 are licensed under the terms of the | |
16 | * GNU GPL, version 2 or (at your option) any later version. | |
305b0eb2 | 17 | */ |
d247d25f AL |
18 | #include <stdio.h> |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <ctype.h> | |
22 | #include <errno.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include "qemu_socket.h" | |
47398b9c | 26 | #include "qemu-common.h" /* for qemu_isdigit */ |
233aa5c2 | 27 | #include "main-loop.h" |
d247d25f AL |
28 | |
29 | #ifndef AI_ADDRCONFIG | |
30 | # define AI_ADDRCONFIG 0 | |
31 | #endif | |
32 | ||
d247d25f AL |
33 | static const int on=1, off=0; |
34 | ||
2af2bf67 | 35 | /* used temporarely until all users are converted to QemuOpts */ |
c1390903 | 36 | static QemuOptsList dummy_opts = { |
2af2bf67 | 37 | .name = "dummy", |
72cf2d4f | 38 | .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head), |
2af2bf67 GH |
39 | .desc = { |
40 | { | |
41 | .name = "path", | |
42 | .type = QEMU_OPT_STRING, | |
f4c94c7c GH |
43 | },{ |
44 | .name = "host", | |
45 | .type = QEMU_OPT_STRING, | |
46 | },{ | |
47 | .name = "port", | |
48 | .type = QEMU_OPT_STRING, | |
49 | },{ | |
50 | .name = "to", | |
51 | .type = QEMU_OPT_NUMBER, | |
52 | },{ | |
53 | .name = "ipv4", | |
54 | .type = QEMU_OPT_BOOL, | |
55 | },{ | |
56 | .name = "ipv6", | |
57 | .type = QEMU_OPT_BOOL, | |
2af2bf67 GH |
58 | }, |
59 | { /* end if list */ } | |
60 | }, | |
61 | }; | |
62 | ||
d247d25f AL |
63 | static int inet_getport(struct addrinfo *e) |
64 | { | |
65 | struct sockaddr_in *i4; | |
66 | struct sockaddr_in6 *i6; | |
67 | ||
68 | switch (e->ai_family) { | |
69 | case PF_INET6: | |
70 | i6 = (void*)e->ai_addr; | |
71 | return ntohs(i6->sin6_port); | |
72 | case PF_INET: | |
73 | i4 = (void*)e->ai_addr; | |
74 | return ntohs(i4->sin_port); | |
75 | default: | |
76 | return 0; | |
77 | } | |
78 | } | |
79 | ||
80 | static void inet_setport(struct addrinfo *e, int port) | |
81 | { | |
82 | struct sockaddr_in *i4; | |
83 | struct sockaddr_in6 *i6; | |
84 | ||
85 | switch (e->ai_family) { | |
86 | case PF_INET6: | |
87 | i6 = (void*)e->ai_addr; | |
88 | i6->sin6_port = htons(port); | |
89 | break; | |
90 | case PF_INET: | |
91 | i4 = (void*)e->ai_addr; | |
92 | i4->sin_port = htons(port); | |
93 | break; | |
94 | } | |
95 | } | |
96 | ||
c9c4b34e | 97 | const char *inet_strfamily(int family) |
d247d25f AL |
98 | { |
99 | switch (family) { | |
100 | case PF_INET6: return "ipv6"; | |
101 | case PF_INET: return "ipv4"; | |
102 | case PF_UNIX: return "unix"; | |
103 | } | |
c445321e | 104 | return "unknown"; |
d247d25f AL |
105 | } |
106 | ||
029409e5 | 107 | int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) |
d247d25f AL |
108 | { |
109 | struct addrinfo ai,*res,*e; | |
e5bc776f | 110 | const char *addr; |
d247d25f AL |
111 | char port[33]; |
112 | char uaddr[INET6_ADDRSTRLEN+1]; | |
113 | char uport[33]; | |
877691f9 | 114 | int slisten, rc, to, port_min, port_max, p; |
d247d25f AL |
115 | |
116 | memset(&ai,0, sizeof(ai)); | |
117 | ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG; | |
118 | ai.ai_family = PF_UNSPEC; | |
e5bc776f | 119 | ai.ai_socktype = SOCK_STREAM; |
d247d25f | 120 | |
e23a22e6 JO |
121 | if ((qemu_opt_get(opts, "host") == NULL) || |
122 | (qemu_opt_get(opts, "port") == NULL)) { | |
a12fb8ad | 123 | error_setg(errp, "host and/or port not specified"); |
e5bc776f | 124 | return -1; |
d247d25f | 125 | } |
e5bc776f GH |
126 | pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port")); |
127 | addr = qemu_opt_get(opts, "host"); | |
d247d25f | 128 | |
e5bc776f GH |
129 | to = qemu_opt_get_number(opts, "to", 0); |
130 | if (qemu_opt_get_bool(opts, "ipv4", 0)) | |
d247d25f | 131 | ai.ai_family = PF_INET; |
e5bc776f | 132 | if (qemu_opt_get_bool(opts, "ipv6", 0)) |
d247d25f AL |
133 | ai.ai_family = PF_INET6; |
134 | ||
135 | /* lookup */ | |
136 | if (port_offset) | |
137 | snprintf(port, sizeof(port), "%d", atoi(port) + port_offset); | |
138 | rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res); | |
139 | if (rc != 0) { | |
a12fb8ad PB |
140 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
141 | gai_strerror(rc)); | |
d247d25f AL |
142 | return -1; |
143 | } | |
d247d25f AL |
144 | |
145 | /* create socket + bind */ | |
146 | for (e = res; e != NULL; e = e->ai_next) { | |
39b6efc8 | 147 | getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen, |
148 | uaddr,INET6_ADDRSTRLEN,uport,32, | |
149 | NI_NUMERICHOST | NI_NUMERICSERV); | |
40ff6d7e | 150 | slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol); |
39b6efc8 | 151 | if (slisten < 0) { |
029409e5 | 152 | if (!e->ai_next) { |
a12fb8ad | 153 | error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
029409e5 | 154 | } |
39b6efc8 | 155 | continue; |
156 | } | |
d247d25f AL |
157 | |
158 | setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); | |
159 | #ifdef IPV6_V6ONLY | |
160 | if (e->ai_family == PF_INET6) { | |
161 | /* listen on both ipv4 and ipv6 */ | |
39b6efc8 | 162 | setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off, |
163 | sizeof(off)); | |
d247d25f AL |
164 | } |
165 | #endif | |
166 | ||
877691f9 MA |
167 | port_min = inet_getport(e); |
168 | port_max = to ? to + port_offset : port_min; | |
169 | for (p = port_min; p <= port_max; p++) { | |
170 | inet_setport(e, p); | |
d247d25f | 171 | if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) { |
d247d25f AL |
172 | goto listen; |
173 | } | |
877691f9 | 174 | if (p == port_max) { |
029409e5 | 175 | if (!e->ai_next) { |
a12fb8ad | 176 | error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
029409e5 | 177 | } |
d247d25f | 178 | } |
d247d25f AL |
179 | } |
180 | closesocket(slisten); | |
181 | } | |
d247d25f AL |
182 | freeaddrinfo(res); |
183 | return -1; | |
184 | ||
185 | listen: | |
186 | if (listen(slisten,1) != 0) { | |
a12fb8ad | 187 | error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); |
d247d25f | 188 | closesocket(slisten); |
39b6efc8 | 189 | freeaddrinfo(res); |
d247d25f AL |
190 | return -1; |
191 | } | |
e5bc776f GH |
192 | snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset); |
193 | qemu_opt_set(opts, "host", uaddr); | |
194 | qemu_opt_set(opts, "port", uport); | |
195 | qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off"); | |
196 | qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off"); | |
d247d25f AL |
197 | freeaddrinfo(res); |
198 | return slisten; | |
199 | } | |
200 | ||
05bc1d8a MT |
201 | #ifdef _WIN32 |
202 | #define QEMU_SOCKET_RC_INPROGRESS(rc) \ | |
203 | ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY) | |
204 | #else | |
205 | #define QEMU_SOCKET_RC_INPROGRESS(rc) \ | |
206 | ((rc) == -EINPROGRESS) | |
207 | #endif | |
208 | ||
233aa5c2 OW |
209 | /* Struct to store connect state for non blocking connect */ |
210 | typedef struct ConnectState { | |
211 | int fd; | |
212 | struct addrinfo *addr_list; | |
213 | struct addrinfo *current_addr; | |
214 | NonBlockingConnectHandler *callback; | |
215 | void *opaque; | |
216 | } ConnectState; | |
217 | ||
218 | static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, | |
11663b55 | 219 | ConnectState *connect_state, Error **errp); |
233aa5c2 OW |
220 | |
221 | static void wait_for_connect(void *opaque) | |
d247d25f | 222 | { |
233aa5c2 OW |
223 | ConnectState *s = opaque; |
224 | int val = 0, rc = 0; | |
225 | socklen_t valsize = sizeof(val); | |
226 | bool in_progress; | |
227 | ||
228 | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); | |
229 | ||
230 | do { | |
231 | rc = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (void *) &val, &valsize); | |
232 | } while (rc == -1 && socket_error() == EINTR); | |
233 | ||
234 | /* update rc to contain error */ | |
235 | if (!rc && val) { | |
236 | rc = -1; | |
237 | } | |
238 | ||
239 | /* connect error */ | |
240 | if (rc < 0) { | |
241 | closesocket(s->fd); | |
242 | s->fd = rc; | |
243 | } | |
244 | ||
245 | /* try to connect to the next address on the list */ | |
1fc05adf PB |
246 | if (s->current_addr) { |
247 | while (s->current_addr->ai_next != NULL && s->fd < 0) { | |
248 | s->current_addr = s->current_addr->ai_next; | |
11663b55 | 249 | s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL); |
1fc05adf PB |
250 | /* connect in progress */ |
251 | if (in_progress) { | |
252 | return; | |
253 | } | |
233aa5c2 | 254 | } |
1fc05adf PB |
255 | |
256 | freeaddrinfo(s->addr_list); | |
233aa5c2 | 257 | } |
05bc1d8a | 258 | |
233aa5c2 OW |
259 | if (s->callback) { |
260 | s->callback(s->fd, s->opaque); | |
05bc1d8a | 261 | } |
233aa5c2 | 262 | g_free(s); |
233aa5c2 OW |
263 | } |
264 | ||
265 | static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, | |
11663b55 | 266 | ConnectState *connect_state, Error **errp) |
233aa5c2 OW |
267 | { |
268 | int sock, rc; | |
269 | ||
270 | *in_progress = false; | |
05bc1d8a MT |
271 | |
272 | sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); | |
273 | if (sock < 0) { | |
11663b55 | 274 | error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
05bc1d8a MT |
275 | return -1; |
276 | } | |
58455eb9 | 277 | qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
233aa5c2 | 278 | if (connect_state != NULL) { |
05bc1d8a MT |
279 | socket_set_nonblock(sock); |
280 | } | |
281 | /* connect to peer */ | |
282 | do { | |
283 | rc = 0; | |
284 | if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) { | |
285 | rc = -socket_error(); | |
286 | } | |
287 | } while (rc == -EINTR); | |
288 | ||
233aa5c2 OW |
289 | if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { |
290 | connect_state->fd = sock; | |
291 | qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, | |
292 | connect_state); | |
293 | *in_progress = true; | |
05bc1d8a | 294 | } else if (rc < 0) { |
11663b55 | 295 | error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
05bc1d8a MT |
296 | closesocket(sock); |
297 | return -1; | |
298 | } | |
299 | return sock; | |
300 | } | |
301 | ||
302 | static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp) | |
303 | { | |
304 | struct addrinfo ai, *res; | |
305 | int rc; | |
f4c94c7c GH |
306 | const char *addr; |
307 | const char *port; | |
d247d25f | 308 | |
05bc1d8a | 309 | memset(&ai, 0, sizeof(ai)); |
233aa5c2 | 310 | |
d247d25f AL |
311 | ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
312 | ai.ai_family = PF_UNSPEC; | |
f4c94c7c | 313 | ai.ai_socktype = SOCK_STREAM; |
d247d25f | 314 | |
f4c94c7c GH |
315 | addr = qemu_opt_get(opts, "host"); |
316 | port = qemu_opt_get(opts, "port"); | |
317 | if (addr == NULL || port == NULL) { | |
a12fb8ad | 318 | error_setg(errp, "host and/or port not specified"); |
05bc1d8a | 319 | return NULL; |
d247d25f AL |
320 | } |
321 | ||
05bc1d8a | 322 | if (qemu_opt_get_bool(opts, "ipv4", 0)) { |
d247d25f | 323 | ai.ai_family = PF_INET; |
05bc1d8a MT |
324 | } |
325 | if (qemu_opt_get_bool(opts, "ipv6", 0)) { | |
d247d25f | 326 | ai.ai_family = PF_INET6; |
05bc1d8a | 327 | } |
d247d25f AL |
328 | |
329 | /* lookup */ | |
05bc1d8a MT |
330 | rc = getaddrinfo(addr, port, &ai, &res); |
331 | if (rc != 0) { | |
a12fb8ad PB |
332 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
333 | gai_strerror(rc)); | |
05bc1d8a MT |
334 | return NULL; |
335 | } | |
336 | return res; | |
337 | } | |
338 | ||
5db5f44c OW |
339 | /** |
340 | * Create a socket and connect it to an address. | |
341 | * | |
342 | * @opts: QEMU options, recognized parameters strings "host" and "port", | |
343 | * bools "ipv4" and "ipv6". | |
5db5f44c | 344 | * @errp: set on error |
233aa5c2 OW |
345 | * @callback: callback function for non-blocking connect |
346 | * @opaque: opaque for callback function | |
5db5f44c OW |
347 | * |
348 | * Returns: -1 on error, file descriptor on success. | |
233aa5c2 OW |
349 | * |
350 | * If @callback is non-null, the connect is non-blocking. If this | |
351 | * function succeeds, callback will be called when the connection | |
352 | * completes, with the file descriptor on success, or -1 on error. | |
5db5f44c | 353 | */ |
233aa5c2 OW |
354 | int inet_connect_opts(QemuOpts *opts, Error **errp, |
355 | NonBlockingConnectHandler *callback, void *opaque) | |
05bc1d8a MT |
356 | { |
357 | struct addrinfo *res, *e; | |
358 | int sock = -1; | |
233aa5c2 OW |
359 | bool in_progress; |
360 | ConnectState *connect_state = NULL; | |
05bc1d8a MT |
361 | |
362 | res = inet_parse_connect_opts(opts, errp); | |
363 | if (!res) { | |
364 | return -1; | |
365 | } | |
366 | ||
233aa5c2 OW |
367 | if (callback != NULL) { |
368 | connect_state = g_malloc0(sizeof(*connect_state)); | |
369 | connect_state->addr_list = res; | |
370 | connect_state->callback = callback; | |
371 | connect_state->opaque = opaque; | |
d247d25f | 372 | } |
d247d25f AL |
373 | |
374 | for (e = res; e != NULL; e = e->ai_next) { | |
233aa5c2 OW |
375 | if (connect_state != NULL) { |
376 | connect_state->current_addr = e; | |
377 | } | |
11663b55 | 378 | sock = inet_connect_addr(e, &in_progress, connect_state, errp); |
233aa5c2 OW |
379 | if (in_progress) { |
380 | return sock; | |
381 | } else if (sock >= 0) { | |
382 | /* non blocking socket immediate success, call callback */ | |
383 | if (callback != NULL) { | |
384 | callback(sock, opaque); | |
385 | } | |
05bc1d8a | 386 | break; |
a6ba35b3 | 387 | } |
d247d25f | 388 | } |
233aa5c2 | 389 | g_free(connect_state); |
d247d25f | 390 | freeaddrinfo(res); |
05bc1d8a | 391 | return sock; |
d247d25f AL |
392 | } |
393 | ||
7fc4e63e | 394 | int inet_dgram_opts(QemuOpts *opts, Error **errp) |
7e1b35b4 GH |
395 | { |
396 | struct addrinfo ai, *peer = NULL, *local = NULL; | |
397 | const char *addr; | |
398 | const char *port; | |
7e1b35b4 GH |
399 | int sock = -1, rc; |
400 | ||
401 | /* lookup peer addr */ | |
402 | memset(&ai,0, sizeof(ai)); | |
403 | ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; | |
404 | ai.ai_family = PF_UNSPEC; | |
405 | ai.ai_socktype = SOCK_DGRAM; | |
406 | ||
407 | addr = qemu_opt_get(opts, "host"); | |
408 | port = qemu_opt_get(opts, "port"); | |
409 | if (addr == NULL || strlen(addr) == 0) { | |
410 | addr = "localhost"; | |
411 | } | |
412 | if (port == NULL || strlen(port) == 0) { | |
4f085c82 | 413 | error_setg(errp, "remote port not specified"); |
7e1b35b4 GH |
414 | return -1; |
415 | } | |
416 | ||
417 | if (qemu_opt_get_bool(opts, "ipv4", 0)) | |
418 | ai.ai_family = PF_INET; | |
419 | if (qemu_opt_get_bool(opts, "ipv6", 0)) | |
420 | ai.ai_family = PF_INET6; | |
421 | ||
422 | if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) { | |
4f085c82 PB |
423 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
424 | gai_strerror(rc)); | |
7e1b35b4 GH |
425 | return -1; |
426 | } | |
7e1b35b4 GH |
427 | |
428 | /* lookup local addr */ | |
429 | memset(&ai,0, sizeof(ai)); | |
430 | ai.ai_flags = AI_PASSIVE; | |
431 | ai.ai_family = peer->ai_family; | |
432 | ai.ai_socktype = SOCK_DGRAM; | |
433 | ||
434 | addr = qemu_opt_get(opts, "localaddr"); | |
435 | port = qemu_opt_get(opts, "localport"); | |
436 | if (addr == NULL || strlen(addr) == 0) { | |
437 | addr = NULL; | |
438 | } | |
439 | if (!port || strlen(port) == 0) | |
440 | port = "0"; | |
441 | ||
442 | if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) { | |
4f085c82 PB |
443 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
444 | gai_strerror(rc)); | |
39b38459 | 445 | goto err; |
7e1b35b4 | 446 | } |
7e1b35b4 GH |
447 | |
448 | /* create socket */ | |
40ff6d7e | 449 | sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol); |
7e1b35b4 | 450 | if (sock < 0) { |
4f085c82 | 451 | error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
7e1b35b4 GH |
452 | goto err; |
453 | } | |
454 | setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); | |
455 | ||
456 | /* bind socket */ | |
7e1b35b4 | 457 | if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) { |
4f085c82 | 458 | error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
7e1b35b4 GH |
459 | goto err; |
460 | } | |
461 | ||
462 | /* connect to peer */ | |
7e1b35b4 | 463 | if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) { |
4f085c82 | 464 | error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
7e1b35b4 GH |
465 | goto err; |
466 | } | |
467 | ||
468 | freeaddrinfo(local); | |
469 | freeaddrinfo(peer); | |
470 | return sock; | |
471 | ||
472 | err: | |
473 | if (-1 != sock) | |
474 | closesocket(sock); | |
475 | if (local) | |
476 | freeaddrinfo(local); | |
477 | if (peer) | |
478 | freeaddrinfo(peer); | |
479 | return -1; | |
480 | } | |
481 | ||
f4c94c7c | 482 | /* compatibility wrapper */ |
879e45c7 | 483 | static InetSocketAddress *inet_parse(const char *str, Error **errp) |
f4c94c7c | 484 | { |
879e45c7 | 485 | InetSocketAddress *addr; |
f4c94c7c | 486 | const char *optstr, *h; |
879e45c7 | 487 | char host[64]; |
f4c94c7c | 488 | char port[33]; |
879e45c7 | 489 | int to; |
f4c94c7c GH |
490 | int pos; |
491 | ||
879e45c7 PB |
492 | addr = g_new0(InetSocketAddress, 1); |
493 | ||
f4c94c7c GH |
494 | /* parse address */ |
495 | if (str[0] == ':') { | |
496 | /* no host given */ | |
879e45c7 PB |
497 | host[0] = '\0'; |
498 | if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) { | |
2f002c43 | 499 | error_setg(errp, "error parsing port in address '%s'", str); |
879e45c7 | 500 | goto fail; |
f4c94c7c GH |
501 | } |
502 | } else if (str[0] == '[') { | |
503 | /* IPv6 addr */ | |
879e45c7 | 504 | if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) { |
2f002c43 | 505 | error_setg(errp, "error parsing IPv6 address '%s'", str); |
879e45c7 | 506 | goto fail; |
f4c94c7c | 507 | } |
879e45c7 | 508 | addr->ipv6 = addr->has_ipv6 = true; |
f4c94c7c GH |
509 | } else if (qemu_isdigit(str[0])) { |
510 | /* IPv4 addr */ | |
879e45c7 | 511 | if (2 != sscanf(str, "%64[0-9.]:%32[^,]%n", host, port, &pos)) { |
2f002c43 | 512 | error_setg(errp, "error parsing IPv4 address '%s'", str); |
879e45c7 | 513 | goto fail; |
f4c94c7c | 514 | } |
879e45c7 | 515 | addr->ipv4 = addr->has_ipv4 = true; |
f4c94c7c GH |
516 | } else { |
517 | /* hostname */ | |
879e45c7 | 518 | if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) { |
2f002c43 | 519 | error_setg(errp, "error parsing address '%s'", str); |
879e45c7 | 520 | goto fail; |
f4c94c7c GH |
521 | } |
522 | } | |
879e45c7 PB |
523 | |
524 | addr->host = g_strdup(host); | |
525 | addr->port = g_strdup(port); | |
f4c94c7c GH |
526 | |
527 | /* parse options */ | |
528 | optstr = str + pos; | |
529 | h = strstr(optstr, ",to="); | |
879e45c7 PB |
530 | if (h) { |
531 | if (1 != sscanf(str, "%d%n", &to, &pos) || | |
532 | (str[pos] != '\0' && str[pos] != ',')) { | |
533 | error_setg(errp, "error parsing to= argument"); | |
534 | goto fail; | |
535 | } | |
536 | addr->has_to = true; | |
537 | addr->to = to; | |
538 | } | |
539 | if (strstr(optstr, ",ipv4")) { | |
540 | addr->ipv4 = addr->has_ipv4 = true; | |
541 | } | |
542 | if (strstr(optstr, ",ipv6")) { | |
543 | addr->ipv6 = addr->has_ipv6 = true; | |
544 | } | |
545 | return addr; | |
546 | ||
547 | fail: | |
548 | qapi_free_InetSocketAddress(addr); | |
549 | return NULL; | |
550 | } | |
551 | ||
552 | static void inet_addr_to_opts(QemuOpts *opts, InetSocketAddress *addr) | |
553 | { | |
554 | bool ipv4 = addr->ipv4 || !addr->has_ipv4; | |
555 | bool ipv6 = addr->ipv6 || !addr->has_ipv6; | |
556 | ||
557 | if (!ipv4 || !ipv6) { | |
558 | qemu_opt_set_bool(opts, "ipv4", ipv4); | |
559 | qemu_opt_set_bool(opts, "ipv6", ipv6); | |
560 | } | |
561 | if (addr->has_to) { | |
562 | char to[20]; | |
563 | snprintf(to, sizeof(to), "%d", addr->to); | |
564 | qemu_opt_set(opts, "to", to); | |
565 | } | |
566 | qemu_opt_set(opts, "host", addr->host); | |
567 | qemu_opt_set(opts, "port", addr->port); | |
f4c94c7c GH |
568 | } |
569 | ||
e5bc776f | 570 | int inet_listen(const char *str, char *ostr, int olen, |
029409e5 | 571 | int socktype, int port_offset, Error **errp) |
e5bc776f GH |
572 | { |
573 | QemuOpts *opts; | |
574 | char *optstr; | |
575 | int sock = -1; | |
879e45c7 | 576 | InetSocketAddress *addr; |
e5bc776f | 577 | |
879e45c7 PB |
578 | addr = inet_parse(str, errp); |
579 | if (addr != NULL) { | |
580 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); | |
581 | inet_addr_to_opts(opts, addr); | |
582 | qapi_free_InetSocketAddress(addr); | |
029409e5 | 583 | sock = inet_listen_opts(opts, port_offset, errp); |
e5bc776f GH |
584 | if (sock != -1 && ostr) { |
585 | optstr = strchr(str, ','); | |
586 | if (qemu_opt_get_bool(opts, "ipv6", 0)) { | |
587 | snprintf(ostr, olen, "[%s]:%s%s", | |
588 | qemu_opt_get(opts, "host"), | |
589 | qemu_opt_get(opts, "port"), | |
590 | optstr ? optstr : ""); | |
591 | } else { | |
592 | snprintf(ostr, olen, "%s:%s%s", | |
593 | qemu_opt_get(opts, "host"), | |
594 | qemu_opt_get(opts, "port"), | |
595 | optstr ? optstr : ""); | |
596 | } | |
597 | } | |
879e45c7 | 598 | qemu_opts_del(opts); |
e5bc776f | 599 | } |
e5bc776f GH |
600 | return sock; |
601 | } | |
602 | ||
5db5f44c OW |
603 | /** |
604 | * Create a blocking socket and connect it to an address. | |
605 | * | |
606 | * @str: address string | |
607 | * @errp: set in case of an error | |
608 | * | |
609 | * Returns -1 in case of error, file descriptor on success | |
610 | **/ | |
611 | int inet_connect(const char *str, Error **errp) | |
f4c94c7c GH |
612 | { |
613 | QemuOpts *opts; | |
614 | int sock = -1; | |
879e45c7 | 615 | InetSocketAddress *addr; |
f4c94c7c | 616 | |
879e45c7 PB |
617 | addr = inet_parse(str, errp); |
618 | if (addr != NULL) { | |
619 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); | |
620 | inet_addr_to_opts(opts, addr); | |
621 | qapi_free_InetSocketAddress(addr); | |
233aa5c2 | 622 | sock = inet_connect_opts(opts, errp, NULL, NULL); |
879e45c7 | 623 | qemu_opts_del(opts); |
5db5f44c | 624 | } |
5db5f44c OW |
625 | return sock; |
626 | } | |
627 | ||
628 | /** | |
629 | * Create a non-blocking socket and connect it to an address. | |
233aa5c2 OW |
630 | * Calls the callback function with fd in case of success or -1 in case of |
631 | * error. | |
5db5f44c OW |
632 | * |
633 | * @str: address string | |
233aa5c2 OW |
634 | * @callback: callback function that is called when connect completes, |
635 | * cannot be NULL. | |
636 | * @opaque: opaque for callback function | |
5db5f44c OW |
637 | * @errp: set in case of an error |
638 | * | |
233aa5c2 | 639 | * Returns: -1 on immediate error, file descriptor on success. |
5db5f44c | 640 | **/ |
233aa5c2 OW |
641 | int inet_nonblocking_connect(const char *str, |
642 | NonBlockingConnectHandler *callback, | |
643 | void *opaque, Error **errp) | |
5db5f44c OW |
644 | { |
645 | QemuOpts *opts; | |
646 | int sock = -1; | |
879e45c7 | 647 | InetSocketAddress *addr; |
5db5f44c | 648 | |
233aa5c2 OW |
649 | g_assert(callback != NULL); |
650 | ||
879e45c7 PB |
651 | addr = inet_parse(str, errp); |
652 | if (addr != NULL) { | |
653 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); | |
654 | inet_addr_to_opts(opts, addr); | |
655 | qapi_free_InetSocketAddress(addr); | |
233aa5c2 | 656 | sock = inet_connect_opts(opts, errp, callback, opaque); |
879e45c7 | 657 | qemu_opts_del(opts); |
a6ba35b3 | 658 | } |
f4c94c7c GH |
659 | return sock; |
660 | } | |
661 | ||
d247d25f AL |
662 | #ifndef _WIN32 |
663 | ||
7fc4e63e | 664 | int unix_listen_opts(QemuOpts *opts, Error **errp) |
d247d25f AL |
665 | { |
666 | struct sockaddr_un un; | |
62b6adfb GH |
667 | const char *path = qemu_opt_get(opts, "path"); |
668 | int sock, fd; | |
d247d25f | 669 | |
40ff6d7e | 670 | sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0); |
d247d25f | 671 | if (sock < 0) { |
58899664 | 672 | error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
39b6efc8 | 673 | return -1; |
d247d25f AL |
674 | } |
675 | ||
d247d25f AL |
676 | memset(&un, 0, sizeof(un)); |
677 | un.sun_family = AF_UNIX; | |
678 | if (path && strlen(path)) { | |
679 | snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); | |
680 | } else { | |
681 | char *tmpdir = getenv("TMPDIR"); | |
682 | snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX", | |
683 | tmpdir ? tmpdir : "/tmp"); | |
684 | /* | |
685 | * This dummy fd usage silences the mktemp() unsecure warning. | |
686 | * Using mkstemp() doesn't make things more secure here | |
687 | * though. bind() complains about existing files, so we have | |
688 | * to unlink first and thus re-open the race window. The | |
689 | * worst case possible is bind() failing, i.e. a DoS attack. | |
690 | */ | |
691 | fd = mkstemp(un.sun_path); close(fd); | |
62b6adfb | 692 | qemu_opt_set(opts, "path", un.sun_path); |
d247d25f | 693 | } |
d247d25f AL |
694 | |
695 | unlink(un.sun_path); | |
696 | if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { | |
58899664 | 697 | error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
d247d25f AL |
698 | goto err; |
699 | } | |
700 | if (listen(sock, 1) < 0) { | |
58899664 | 701 | error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); |
d247d25f AL |
702 | goto err; |
703 | } | |
704 | ||
d247d25f AL |
705 | return sock; |
706 | ||
707 | err: | |
d247d25f AL |
708 | closesocket(sock); |
709 | return -1; | |
710 | } | |
711 | ||
1fc05adf PB |
712 | int unix_connect_opts(QemuOpts *opts, Error **errp, |
713 | NonBlockingConnectHandler *callback, void *opaque) | |
d247d25f AL |
714 | { |
715 | struct sockaddr_un un; | |
2af2bf67 | 716 | const char *path = qemu_opt_get(opts, "path"); |
1fc05adf PB |
717 | ConnectState *connect_state = NULL; |
718 | int sock, rc; | |
d247d25f | 719 | |
2af2bf67 | 720 | if (NULL == path) { |
58899664 | 721 | error_setg(errp, "unix connect: no path specified\n"); |
2af2bf67 GH |
722 | return -1; |
723 | } | |
724 | ||
40ff6d7e | 725 | sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0); |
d247d25f | 726 | if (sock < 0) { |
58899664 | 727 | error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
39b6efc8 | 728 | return -1; |
d247d25f | 729 | } |
1fc05adf PB |
730 | if (callback != NULL) { |
731 | connect_state = g_malloc0(sizeof(*connect_state)); | |
732 | connect_state->callback = callback; | |
733 | connect_state->opaque = opaque; | |
734 | socket_set_nonblock(sock); | |
735 | } | |
d247d25f AL |
736 | |
737 | memset(&un, 0, sizeof(un)); | |
738 | un.sun_family = AF_UNIX; | |
739 | snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); | |
1fc05adf PB |
740 | |
741 | /* connect to peer */ | |
742 | do { | |
743 | rc = 0; | |
744 | if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) { | |
745 | rc = -socket_error(); | |
746 | } | |
747 | } while (rc == -EINTR); | |
748 | ||
749 | if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { | |
750 | connect_state->fd = sock; | |
751 | qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, | |
752 | connect_state); | |
753 | return sock; | |
754 | } else if (rc >= 0) { | |
755 | /* non blocking socket immediate success, call callback */ | |
756 | if (callback != NULL) { | |
757 | callback(sock, opaque); | |
758 | } | |
759 | } | |
760 | ||
761 | if (rc < 0) { | |
58899664 | 762 | error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED); |
9d947472 | 763 | close(sock); |
1fc05adf | 764 | sock = -1; |
d247d25f AL |
765 | } |
766 | ||
1fc05adf | 767 | g_free(connect_state); |
d247d25f AL |
768 | return sock; |
769 | } | |
770 | ||
0c814709 PB |
771 | #else |
772 | ||
773 | int unix_listen_opts(QemuOpts *opts, Error **errp) | |
774 | { | |
58899664 | 775 | error_setg(errp, "unix sockets are not available on windows"); |
0c814709 PB |
776 | errno = ENOTSUP; |
777 | return -1; | |
778 | } | |
779 | ||
1fc05adf PB |
780 | int unix_connect_opts(QemuOpts *opts, Error **errp, |
781 | NonBlockingConnectHandler *callback, void *opaque) | |
0c814709 | 782 | { |
58899664 | 783 | error_setg(errp, "unix sockets are not available on windows"); |
0c814709 PB |
784 | errno = ENOTSUP; |
785 | return -1; | |
786 | } | |
787 | #endif | |
788 | ||
2af2bf67 | 789 | /* compatibility wrapper */ |
7fc4e63e | 790 | int unix_listen(const char *str, char *ostr, int olen, Error **errp) |
62b6adfb GH |
791 | { |
792 | QemuOpts *opts; | |
793 | char *path, *optstr; | |
794 | int sock, len; | |
795 | ||
8be7e7e4 | 796 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
62b6adfb GH |
797 | |
798 | optstr = strchr(str, ','); | |
799 | if (optstr) { | |
800 | len = optstr - str; | |
801 | if (len) { | |
7267c094 | 802 | path = g_malloc(len+1); |
62b6adfb GH |
803 | snprintf(path, len+1, "%.*s", len, str); |
804 | qemu_opt_set(opts, "path", path); | |
7267c094 | 805 | g_free(path); |
62b6adfb GH |
806 | } |
807 | } else { | |
808 | qemu_opt_set(opts, "path", str); | |
809 | } | |
810 | ||
7fc4e63e | 811 | sock = unix_listen_opts(opts, errp); |
62b6adfb GH |
812 | |
813 | if (sock != -1 && ostr) | |
814 | snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : ""); | |
815 | qemu_opts_del(opts); | |
816 | return sock; | |
817 | } | |
818 | ||
7fc4e63e | 819 | int unix_connect(const char *path, Error **errp) |
2af2bf67 GH |
820 | { |
821 | QemuOpts *opts; | |
822 | int sock; | |
823 | ||
8be7e7e4 | 824 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
2af2bf67 | 825 | qemu_opt_set(opts, "path", path); |
1fc05adf PB |
826 | sock = unix_connect_opts(opts, errp, NULL, NULL); |
827 | qemu_opts_del(opts); | |
828 | return sock; | |
829 | } | |
830 | ||
831 | ||
832 | int unix_nonblocking_connect(const char *path, | |
833 | NonBlockingConnectHandler *callback, | |
834 | void *opaque, Error **errp) | |
835 | { | |
836 | QemuOpts *opts; | |
837 | int sock = -1; | |
838 | ||
839 | g_assert(callback != NULL); | |
840 | ||
841 | opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); | |
842 | qemu_opt_set(opts, "path", path); | |
843 | sock = unix_connect_opts(opts, errp, callback, opaque); | |
2af2bf67 GH |
844 | qemu_opts_del(opts); |
845 | return sock; | |
846 | } | |
847 | ||
0706a4dc PB |
848 | #ifdef _WIN32 |
849 | static void socket_cleanup(void) | |
850 | { | |
851 | WSACleanup(); | |
852 | } | |
853 | #endif | |
854 | ||
855 | int socket_init(void) | |
856 | { | |
857 | #ifdef _WIN32 | |
858 | WSADATA Data; | |
859 | int ret, err; | |
860 | ||
861 | ret = WSAStartup(MAKEWORD(2,2), &Data); | |
862 | if (ret != 0) { | |
863 | err = WSAGetLastError(); | |
864 | fprintf(stderr, "WSAStartup: %d\n", err); | |
865 | return -1; | |
866 | } | |
867 | atexit(socket_cleanup); | |
868 | #endif | |
869 | return 0; | |
870 | } |