2 * inet and unix socket functions for qemu
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.
22 #include "qemu_socket.h"
23 #include "qemu-common.h" /* for qemu_isdigit */
26 # define AI_ADDRCONFIG 0
29 static const int on=1, off=0;
31 /* used temporarely until all users are converted to QemuOpts */
32 static QemuOptsList dummy_opts = {
34 .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
38 .type = QEMU_OPT_STRING,
41 .type = QEMU_OPT_STRING,
44 .type = QEMU_OPT_STRING,
47 .type = QEMU_OPT_NUMBER,
50 .type = QEMU_OPT_BOOL,
53 .type = QEMU_OPT_BOOL,
59 static int inet_getport(struct addrinfo *e)
61 struct sockaddr_in *i4;
62 struct sockaddr_in6 *i6;
64 switch (e->ai_family) {
66 i6 = (void*)e->ai_addr;
67 return ntohs(i6->sin6_port);
69 i4 = (void*)e->ai_addr;
70 return ntohs(i4->sin_port);
76 static void inet_setport(struct addrinfo *e, int port)
78 struct sockaddr_in *i4;
79 struct sockaddr_in6 *i6;
81 switch (e->ai_family) {
83 i6 = (void*)e->ai_addr;
84 i6->sin6_port = htons(port);
87 i4 = (void*)e->ai_addr;
88 i4->sin_port = htons(port);
93 const char *inet_strfamily(int family)
96 case PF_INET6: return "ipv6";
97 case PF_INET: return "ipv4";
98 case PF_UNIX: return "unix";
103 int inet_listen_opts(QemuOpts *opts, int port_offset)
105 struct addrinfo ai,*res,*e;
108 char uaddr[INET6_ADDRSTRLEN+1];
110 int slisten, rc, to, port_min, port_max, p;
112 memset(&ai,0, sizeof(ai));
113 ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
114 ai.ai_family = PF_UNSPEC;
115 ai.ai_socktype = SOCK_STREAM;
117 if ((qemu_opt_get(opts, "host") == NULL) ||
118 (qemu_opt_get(opts, "port") == NULL)) {
119 fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
122 pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
123 addr = qemu_opt_get(opts, "host");
125 to = qemu_opt_get_number(opts, "to", 0);
126 if (qemu_opt_get_bool(opts, "ipv4", 0))
127 ai.ai_family = PF_INET;
128 if (qemu_opt_get_bool(opts, "ipv6", 0))
129 ai.ai_family = PF_INET6;
133 snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
134 rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
136 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
141 /* create socket + bind */
142 for (e = res; e != NULL; e = e->ai_next) {
143 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
144 uaddr,INET6_ADDRSTRLEN,uport,32,
145 NI_NUMERICHOST | NI_NUMERICSERV);
146 slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
148 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
149 inet_strfamily(e->ai_family), strerror(errno));
153 setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
155 if (e->ai_family == PF_INET6) {
156 /* listen on both ipv4 and ipv6 */
157 setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off,
162 port_min = inet_getport(e);
163 port_max = to ? to + port_offset : port_min;
164 for (p = port_min; p <= port_max; p++) {
166 if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
170 fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
171 inet_strfamily(e->ai_family), uaddr, inet_getport(e),
175 closesocket(slisten);
177 fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
182 if (listen(slisten,1) != 0) {
184 closesocket(slisten);
188 snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
189 qemu_opt_set(opts, "host", uaddr);
190 qemu_opt_set(opts, "port", uport);
191 qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
192 qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
197 int inet_connect_opts(QemuOpts *opts)
199 struct addrinfo ai,*res,*e;
202 char uaddr[INET6_ADDRSTRLEN+1];
206 memset(&ai,0, sizeof(ai));
207 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
208 ai.ai_family = PF_UNSPEC;
209 ai.ai_socktype = SOCK_STREAM;
211 addr = qemu_opt_get(opts, "host");
212 port = qemu_opt_get(opts, "port");
213 if (addr == NULL || port == NULL) {
214 fprintf(stderr, "inet_connect: host and/or port not specified\n");
218 if (qemu_opt_get_bool(opts, "ipv4", 0))
219 ai.ai_family = PF_INET;
220 if (qemu_opt_get_bool(opts, "ipv6", 0))
221 ai.ai_family = PF_INET6;
224 if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
225 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
230 for (e = res; e != NULL; e = e->ai_next) {
231 if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
232 uaddr,INET6_ADDRSTRLEN,uport,32,
233 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
234 fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
237 sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
239 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
240 inet_strfamily(e->ai_family), strerror(errno));
243 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
245 /* connect to peer */
246 if (connect(sock,e->ai_addr,e->ai_addrlen) < 0) {
247 if (NULL == e->ai_next)
248 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
249 inet_strfamily(e->ai_family),
250 e->ai_canonname, uaddr, uport, strerror(errno));
261 int inet_dgram_opts(QemuOpts *opts)
263 struct addrinfo ai, *peer = NULL, *local = NULL;
266 char uaddr[INET6_ADDRSTRLEN+1];
270 /* lookup peer addr */
271 memset(&ai,0, sizeof(ai));
272 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
273 ai.ai_family = PF_UNSPEC;
274 ai.ai_socktype = SOCK_DGRAM;
276 addr = qemu_opt_get(opts, "host");
277 port = qemu_opt_get(opts, "port");
278 if (addr == NULL || strlen(addr) == 0) {
281 if (port == NULL || strlen(port) == 0) {
282 fprintf(stderr, "inet_dgram: port not specified\n");
286 if (qemu_opt_get_bool(opts, "ipv4", 0))
287 ai.ai_family = PF_INET;
288 if (qemu_opt_get_bool(opts, "ipv6", 0))
289 ai.ai_family = PF_INET6;
291 if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
292 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
297 /* lookup local addr */
298 memset(&ai,0, sizeof(ai));
299 ai.ai_flags = AI_PASSIVE;
300 ai.ai_family = peer->ai_family;
301 ai.ai_socktype = SOCK_DGRAM;
303 addr = qemu_opt_get(opts, "localaddr");
304 port = qemu_opt_get(opts, "localport");
305 if (addr == NULL || strlen(addr) == 0) {
308 if (!port || strlen(port) == 0)
311 if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
312 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
318 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
320 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
321 inet_strfamily(peer->ai_family), strerror(errno));
324 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
327 if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
328 uaddr,INET6_ADDRSTRLEN,uport,32,
329 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
330 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
333 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
334 fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
335 inet_strfamily(local->ai_family), uaddr, inet_getport(local));
339 /* connect to peer */
340 if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
341 uaddr, INET6_ADDRSTRLEN, uport, 32,
342 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
343 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
346 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
347 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
348 inet_strfamily(peer->ai_family),
349 peer->ai_canonname, uaddr, uport, strerror(errno));
367 /* compatibility wrapper */
368 static int inet_parse(QemuOpts *opts, const char *str)
370 const char *optstr, *h;
379 if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
380 fprintf(stderr, "%s: portonly parse error (%s)\n",
384 } else if (str[0] == '[') {
386 if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
387 fprintf(stderr, "%s: ipv6 parse error (%s)\n",
391 qemu_opt_set(opts, "ipv6", "on");
392 } else if (qemu_isdigit(str[0])) {
394 if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
395 fprintf(stderr, "%s: ipv4 parse error (%s)\n",
399 qemu_opt_set(opts, "ipv4", "on");
402 if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
403 fprintf(stderr, "%s: hostname parse error (%s)\n",
408 qemu_opt_set(opts, "host", addr);
409 qemu_opt_set(opts, "port", port);
413 h = strstr(optstr, ",to=");
415 qemu_opt_set(opts, "to", h+4);
416 if (strstr(optstr, ",ipv4"))
417 qemu_opt_set(opts, "ipv4", "on");
418 if (strstr(optstr, ",ipv6"))
419 qemu_opt_set(opts, "ipv6", "on");
423 int inet_listen(const char *str, char *ostr, int olen,
424 int socktype, int port_offset)
430 opts = qemu_opts_create(&dummy_opts, NULL, 0);
431 if (inet_parse(opts, str) == 0) {
432 sock = inet_listen_opts(opts, port_offset);
433 if (sock != -1 && ostr) {
434 optstr = strchr(str, ',');
435 if (qemu_opt_get_bool(opts, "ipv6", 0)) {
436 snprintf(ostr, olen, "[%s]:%s%s",
437 qemu_opt_get(opts, "host"),
438 qemu_opt_get(opts, "port"),
439 optstr ? optstr : "");
441 snprintf(ostr, olen, "%s:%s%s",
442 qemu_opt_get(opts, "host"),
443 qemu_opt_get(opts, "port"),
444 optstr ? optstr : "");
452 int inet_connect(const char *str, int socktype)
457 opts = qemu_opts_create(&dummy_opts, NULL, 0);
458 if (inet_parse(opts, str) == 0)
459 sock = inet_connect_opts(opts);
466 int unix_listen_opts(QemuOpts *opts)
468 struct sockaddr_un un;
469 const char *path = qemu_opt_get(opts, "path");
472 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
474 perror("socket(unix)");
478 memset(&un, 0, sizeof(un));
479 un.sun_family = AF_UNIX;
480 if (path && strlen(path)) {
481 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
483 char *tmpdir = getenv("TMPDIR");
484 snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
485 tmpdir ? tmpdir : "/tmp");
487 * This dummy fd usage silences the mktemp() unsecure warning.
488 * Using mkstemp() doesn't make things more secure here
489 * though. bind() complains about existing files, so we have
490 * to unlink first and thus re-open the race window. The
491 * worst case possible is bind() failing, i.e. a DoS attack.
493 fd = mkstemp(un.sun_path); close(fd);
494 qemu_opt_set(opts, "path", un.sun_path);
498 if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
499 fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
502 if (listen(sock, 1) < 0) {
503 fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
514 int unix_connect_opts(QemuOpts *opts)
516 struct sockaddr_un un;
517 const char *path = qemu_opt_get(opts, "path");
521 fprintf(stderr, "unix connect: no path specified\n");
525 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
527 perror("socket(unix)");
531 memset(&un, 0, sizeof(un));
532 un.sun_family = AF_UNIX;
533 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
534 if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
535 fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
543 /* compatibility wrapper */
544 int unix_listen(const char *str, char *ostr, int olen)
550 opts = qemu_opts_create(&dummy_opts, NULL, 0);
552 optstr = strchr(str, ',');
556 path = g_malloc(len+1);
557 snprintf(path, len+1, "%.*s", len, str);
558 qemu_opt_set(opts, "path", path);
562 qemu_opt_set(opts, "path", str);
565 sock = unix_listen_opts(opts);
567 if (sock != -1 && ostr)
568 snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
573 int unix_connect(const char *path)
578 opts = qemu_opts_create(&dummy_opts, NULL, 0);
579 qemu_opt_set(opts, "path", path);
580 sock = unix_connect_opts(opts);
587 int unix_listen_opts(QemuOpts *opts)
589 fprintf(stderr, "unix sockets are not available on windows\n");
594 int unix_connect_opts(QemuOpts *opts)
596 fprintf(stderr, "unix sockets are not available on windows\n");
601 int unix_listen(const char *path, char *ostr, int olen)
603 fprintf(stderr, "unix sockets are not available on windows\n");
608 int unix_connect(const char *path)
610 fprintf(stderr, "unix sockets are not available on windows\n");
618 static void socket_cleanup(void)
624 int socket_init(void)
630 ret = WSAStartup(MAKEWORD(2,2), &Data);
632 err = WSAGetLastError();
633 fprintf(stderr, "WSAStartup: %d\n", err);
636 atexit(socket_cleanup);