2 * inet and unix socket functions for qemu
4 * (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
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.
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.
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.
25 #include "qemu_socket.h"
26 #include "qemu-common.h" /* for qemu_isdigit */
29 # define AI_ADDRCONFIG 0
32 static const int on=1, off=0;
34 /* used temporarely until all users are converted to QemuOpts */
35 static QemuOptsList dummy_opts = {
37 .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
41 .type = QEMU_OPT_STRING,
44 .type = QEMU_OPT_STRING,
47 .type = QEMU_OPT_STRING,
50 .type = QEMU_OPT_NUMBER,
53 .type = QEMU_OPT_BOOL,
56 .type = QEMU_OPT_BOOL,
59 .type = QEMU_OPT_BOOL,
65 static int inet_getport(struct addrinfo *e)
67 struct sockaddr_in *i4;
68 struct sockaddr_in6 *i6;
70 switch (e->ai_family) {
72 i6 = (void*)e->ai_addr;
73 return ntohs(i6->sin6_port);
75 i4 = (void*)e->ai_addr;
76 return ntohs(i4->sin_port);
82 static void inet_setport(struct addrinfo *e, int port)
84 struct sockaddr_in *i4;
85 struct sockaddr_in6 *i6;
87 switch (e->ai_family) {
89 i6 = (void*)e->ai_addr;
90 i6->sin6_port = htons(port);
93 i4 = (void*)e->ai_addr;
94 i4->sin_port = htons(port);
99 const char *inet_strfamily(int family)
102 case PF_INET6: return "ipv6";
103 case PF_INET: return "ipv4";
104 case PF_UNIX: return "unix";
109 int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
111 struct addrinfo ai,*res,*e;
114 char uaddr[INET6_ADDRSTRLEN+1];
116 int slisten, rc, to, port_min, port_max, p;
118 memset(&ai,0, sizeof(ai));
119 ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
120 ai.ai_family = PF_UNSPEC;
121 ai.ai_socktype = SOCK_STREAM;
123 if ((qemu_opt_get(opts, "host") == NULL) ||
124 (qemu_opt_get(opts, "port") == NULL)) {
125 fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
126 error_set(errp, QERR_SOCKET_CREATE_FAILED);
129 pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
130 addr = qemu_opt_get(opts, "host");
132 to = qemu_opt_get_number(opts, "to", 0);
133 if (qemu_opt_get_bool(opts, "ipv4", 0))
134 ai.ai_family = PF_INET;
135 if (qemu_opt_get_bool(opts, "ipv6", 0))
136 ai.ai_family = PF_INET6;
140 snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
141 rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
143 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
145 error_set(errp, QERR_SOCKET_CREATE_FAILED);
149 /* create socket + bind */
150 for (e = res; e != NULL; e = e->ai_next) {
151 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
152 uaddr,INET6_ADDRSTRLEN,uport,32,
153 NI_NUMERICHOST | NI_NUMERICSERV);
154 slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
156 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
157 inet_strfamily(e->ai_family), strerror(errno));
159 error_set(errp, QERR_SOCKET_CREATE_FAILED);
164 setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
166 if (e->ai_family == PF_INET6) {
167 /* listen on both ipv4 and ipv6 */
168 setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off,
173 port_min = inet_getport(e);
174 port_max = to ? to + port_offset : port_min;
175 for (p = port_min; p <= port_max; p++) {
177 if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
181 fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
182 inet_strfamily(e->ai_family), uaddr, inet_getport(e),
185 error_set(errp, QERR_SOCKET_BIND_FAILED);
189 closesocket(slisten);
191 fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
196 if (listen(slisten,1) != 0) {
197 error_set(errp, QERR_SOCKET_LISTEN_FAILED);
199 closesocket(slisten);
203 snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
204 qemu_opt_set(opts, "host", uaddr);
205 qemu_opt_set(opts, "port", uport);
206 qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
207 qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
212 int inet_connect_opts(QemuOpts *opts, Error **errp)
214 struct addrinfo ai,*res,*e;
217 char uaddr[INET6_ADDRSTRLEN+1];
222 memset(&ai,0, sizeof(ai));
223 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
224 ai.ai_family = PF_UNSPEC;
225 ai.ai_socktype = SOCK_STREAM;
227 addr = qemu_opt_get(opts, "host");
228 port = qemu_opt_get(opts, "port");
229 block = qemu_opt_get_bool(opts, "block", 0);
230 if (addr == NULL || port == NULL) {
231 fprintf(stderr, "inet_connect: host and/or port not specified\n");
232 error_set(errp, QERR_SOCKET_CREATE_FAILED);
236 if (qemu_opt_get_bool(opts, "ipv4", 0))
237 ai.ai_family = PF_INET;
238 if (qemu_opt_get_bool(opts, "ipv6", 0))
239 ai.ai_family = PF_INET6;
242 if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
243 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
245 error_set(errp, QERR_SOCKET_CREATE_FAILED);
249 for (e = res; e != NULL; e = e->ai_next) {
250 if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
251 uaddr,INET6_ADDRSTRLEN,uport,32,
252 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
253 fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
256 sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
258 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
259 inet_strfamily(e->ai_family), strerror(errno));
262 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
264 socket_set_nonblock(sock);
266 /* connect to peer */
269 if (connect(sock, e->ai_addr, e->ai_addrlen) < 0) {
270 rc = -socket_error();
272 } while (rc == -EINTR);
275 if (!block && (rc == -EINPROGRESS || rc == -EWOULDBLOCK
276 || rc == -WSAEALREADY)) {
278 if (!block && (rc == -EINPROGRESS)) {
280 error_set(errp, QERR_SOCKET_CONNECT_IN_PROGRESS);
282 if (NULL == e->ai_next)
283 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
284 inet_strfamily(e->ai_family),
285 e->ai_canonname, uaddr, uport, strerror(errno));
292 error_set(errp, QERR_SOCKET_CONNECT_FAILED);
297 int inet_dgram_opts(QemuOpts *opts)
299 struct addrinfo ai, *peer = NULL, *local = NULL;
302 char uaddr[INET6_ADDRSTRLEN+1];
306 /* lookup peer addr */
307 memset(&ai,0, sizeof(ai));
308 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
309 ai.ai_family = PF_UNSPEC;
310 ai.ai_socktype = SOCK_DGRAM;
312 addr = qemu_opt_get(opts, "host");
313 port = qemu_opt_get(opts, "port");
314 if (addr == NULL || strlen(addr) == 0) {
317 if (port == NULL || strlen(port) == 0) {
318 fprintf(stderr, "inet_dgram: port not specified\n");
322 if (qemu_opt_get_bool(opts, "ipv4", 0))
323 ai.ai_family = PF_INET;
324 if (qemu_opt_get_bool(opts, "ipv6", 0))
325 ai.ai_family = PF_INET6;
327 if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
328 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
333 /* lookup local addr */
334 memset(&ai,0, sizeof(ai));
335 ai.ai_flags = AI_PASSIVE;
336 ai.ai_family = peer->ai_family;
337 ai.ai_socktype = SOCK_DGRAM;
339 addr = qemu_opt_get(opts, "localaddr");
340 port = qemu_opt_get(opts, "localport");
341 if (addr == NULL || strlen(addr) == 0) {
344 if (!port || strlen(port) == 0)
347 if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
348 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
354 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
356 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
357 inet_strfamily(peer->ai_family), strerror(errno));
360 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
363 if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
364 uaddr,INET6_ADDRSTRLEN,uport,32,
365 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
366 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
369 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
370 fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
371 inet_strfamily(local->ai_family), uaddr, inet_getport(local));
375 /* connect to peer */
376 if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
377 uaddr, INET6_ADDRSTRLEN, uport, 32,
378 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
379 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
382 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
383 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
384 inet_strfamily(peer->ai_family),
385 peer->ai_canonname, uaddr, uport, strerror(errno));
403 /* compatibility wrapper */
404 static int inet_parse(QemuOpts *opts, const char *str)
406 const char *optstr, *h;
415 if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
416 fprintf(stderr, "%s: portonly parse error (%s)\n",
420 } else if (str[0] == '[') {
422 if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
423 fprintf(stderr, "%s: ipv6 parse error (%s)\n",
427 qemu_opt_set(opts, "ipv6", "on");
428 } else if (qemu_isdigit(str[0])) {
430 if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
431 fprintf(stderr, "%s: ipv4 parse error (%s)\n",
435 qemu_opt_set(opts, "ipv4", "on");
438 if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
439 fprintf(stderr, "%s: hostname parse error (%s)\n",
444 qemu_opt_set(opts, "host", addr);
445 qemu_opt_set(opts, "port", port);
449 h = strstr(optstr, ",to=");
451 qemu_opt_set(opts, "to", h+4);
452 if (strstr(optstr, ",ipv4"))
453 qemu_opt_set(opts, "ipv4", "on");
454 if (strstr(optstr, ",ipv6"))
455 qemu_opt_set(opts, "ipv6", "on");
459 int inet_listen(const char *str, char *ostr, int olen,
460 int socktype, int port_offset, Error **errp)
466 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
467 if (inet_parse(opts, str) == 0) {
468 sock = inet_listen_opts(opts, port_offset, errp);
469 if (sock != -1 && ostr) {
470 optstr = strchr(str, ',');
471 if (qemu_opt_get_bool(opts, "ipv6", 0)) {
472 snprintf(ostr, olen, "[%s]:%s%s",
473 qemu_opt_get(opts, "host"),
474 qemu_opt_get(opts, "port"),
475 optstr ? optstr : "");
477 snprintf(ostr, olen, "%s:%s%s",
478 qemu_opt_get(opts, "host"),
479 qemu_opt_get(opts, "port"),
480 optstr ? optstr : "");
484 error_set(errp, QERR_SOCKET_CREATE_FAILED);
490 int inet_connect(const char *str, bool block, Error **errp)
495 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
496 if (inet_parse(opts, str) == 0) {
498 qemu_opt_set(opts, "block", "on");
500 sock = inet_connect_opts(opts, errp);
502 error_set(errp, QERR_SOCKET_CREATE_FAILED);
510 int unix_listen_opts(QemuOpts *opts)
512 struct sockaddr_un un;
513 const char *path = qemu_opt_get(opts, "path");
516 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
518 perror("socket(unix)");
522 memset(&un, 0, sizeof(un));
523 un.sun_family = AF_UNIX;
524 if (path && strlen(path)) {
525 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
527 char *tmpdir = getenv("TMPDIR");
528 snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
529 tmpdir ? tmpdir : "/tmp");
531 * This dummy fd usage silences the mktemp() unsecure warning.
532 * Using mkstemp() doesn't make things more secure here
533 * though. bind() complains about existing files, so we have
534 * to unlink first and thus re-open the race window. The
535 * worst case possible is bind() failing, i.e. a DoS attack.
537 fd = mkstemp(un.sun_path); close(fd);
538 qemu_opt_set(opts, "path", un.sun_path);
542 if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
543 fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
546 if (listen(sock, 1) < 0) {
547 fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
558 int unix_connect_opts(QemuOpts *opts)
560 struct sockaddr_un un;
561 const char *path = qemu_opt_get(opts, "path");
565 fprintf(stderr, "unix connect: no path specified\n");
569 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
571 perror("socket(unix)");
575 memset(&un, 0, sizeof(un));
576 un.sun_family = AF_UNIX;
577 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
578 if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
579 fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
587 /* compatibility wrapper */
588 int unix_listen(const char *str, char *ostr, int olen)
594 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
596 optstr = strchr(str, ',');
600 path = g_malloc(len+1);
601 snprintf(path, len+1, "%.*s", len, str);
602 qemu_opt_set(opts, "path", path);
606 qemu_opt_set(opts, "path", str);
609 sock = unix_listen_opts(opts);
611 if (sock != -1 && ostr)
612 snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
617 int unix_connect(const char *path)
622 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
623 qemu_opt_set(opts, "path", path);
624 sock = unix_connect_opts(opts);
631 int unix_listen_opts(QemuOpts *opts)
633 fprintf(stderr, "unix sockets are not available on windows\n");
638 int unix_connect_opts(QemuOpts *opts)
640 fprintf(stderr, "unix sockets are not available on windows\n");
645 int unix_listen(const char *path, char *ostr, int olen)
647 fprintf(stderr, "unix sockets are not available on windows\n");
652 int unix_connect(const char *path)
654 fprintf(stderr, "unix sockets are not available on windows\n");
662 static void socket_cleanup(void)
668 int socket_init(void)
674 ret = WSAStartup(MAKEWORD(2,2), &Data);
676 err = WSAGetLastError();
677 fprintf(stderr, "WSAStartup: %d\n", err);
680 atexit(socket_cleanup);