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.
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, bool *in_progress, 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;
228 *in_progress = false;
231 addr = qemu_opt_get(opts, "host");
232 port = qemu_opt_get(opts, "port");
233 block = qemu_opt_get_bool(opts, "block", 0);
234 if (addr == NULL || port == NULL) {
235 fprintf(stderr, "inet_connect: host and/or port not specified\n");
236 error_set(errp, QERR_SOCKET_CREATE_FAILED);
240 if (qemu_opt_get_bool(opts, "ipv4", 0))
241 ai.ai_family = PF_INET;
242 if (qemu_opt_get_bool(opts, "ipv6", 0))
243 ai.ai_family = PF_INET6;
246 if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
247 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
249 error_set(errp, QERR_SOCKET_CREATE_FAILED);
253 for (e = res; e != NULL; e = e->ai_next) {
254 if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
255 uaddr,INET6_ADDRSTRLEN,uport,32,
256 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
257 fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
260 sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
262 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
263 inet_strfamily(e->ai_family), strerror(errno));
266 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
268 socket_set_nonblock(sock);
270 /* connect to peer */
273 if (connect(sock, e->ai_addr, e->ai_addrlen) < 0) {
274 rc = -socket_error();
276 } while (rc == -EINTR);
279 if (!block && (rc == -EINPROGRESS || rc == -EWOULDBLOCK
280 || rc == -WSAEALREADY)) {
282 if (!block && (rc == -EINPROGRESS)) {
288 if (NULL == e->ai_next)
289 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
290 inet_strfamily(e->ai_family),
291 e->ai_canonname, uaddr, uport, strerror(errno));
298 error_set(errp, QERR_SOCKET_CONNECT_FAILED);
303 int inet_dgram_opts(QemuOpts *opts)
305 struct addrinfo ai, *peer = NULL, *local = NULL;
308 char uaddr[INET6_ADDRSTRLEN+1];
312 /* lookup peer addr */
313 memset(&ai,0, sizeof(ai));
314 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
315 ai.ai_family = PF_UNSPEC;
316 ai.ai_socktype = SOCK_DGRAM;
318 addr = qemu_opt_get(opts, "host");
319 port = qemu_opt_get(opts, "port");
320 if (addr == NULL || strlen(addr) == 0) {
323 if (port == NULL || strlen(port) == 0) {
324 fprintf(stderr, "inet_dgram: port not specified\n");
328 if (qemu_opt_get_bool(opts, "ipv4", 0))
329 ai.ai_family = PF_INET;
330 if (qemu_opt_get_bool(opts, "ipv6", 0))
331 ai.ai_family = PF_INET6;
333 if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
334 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
339 /* lookup local addr */
340 memset(&ai,0, sizeof(ai));
341 ai.ai_flags = AI_PASSIVE;
342 ai.ai_family = peer->ai_family;
343 ai.ai_socktype = SOCK_DGRAM;
345 addr = qemu_opt_get(opts, "localaddr");
346 port = qemu_opt_get(opts, "localport");
347 if (addr == NULL || strlen(addr) == 0) {
350 if (!port || strlen(port) == 0)
353 if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
354 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
360 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
362 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
363 inet_strfamily(peer->ai_family), strerror(errno));
366 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
369 if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
370 uaddr,INET6_ADDRSTRLEN,uport,32,
371 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
372 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
375 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
376 fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
377 inet_strfamily(local->ai_family), uaddr, inet_getport(local));
381 /* connect to peer */
382 if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
383 uaddr, INET6_ADDRSTRLEN, uport, 32,
384 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
385 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
388 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
389 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
390 inet_strfamily(peer->ai_family),
391 peer->ai_canonname, uaddr, uport, strerror(errno));
409 /* compatibility wrapper */
410 static int inet_parse(QemuOpts *opts, const char *str)
412 const char *optstr, *h;
421 if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
422 fprintf(stderr, "%s: portonly parse error (%s)\n",
426 } else if (str[0] == '[') {
428 if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
429 fprintf(stderr, "%s: ipv6 parse error (%s)\n",
433 qemu_opt_set(opts, "ipv6", "on");
434 } else if (qemu_isdigit(str[0])) {
436 if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
437 fprintf(stderr, "%s: ipv4 parse error (%s)\n",
441 qemu_opt_set(opts, "ipv4", "on");
444 if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
445 fprintf(stderr, "%s: hostname parse error (%s)\n",
450 qemu_opt_set(opts, "host", addr);
451 qemu_opt_set(opts, "port", port);
455 h = strstr(optstr, ",to=");
457 qemu_opt_set(opts, "to", h+4);
458 if (strstr(optstr, ",ipv4"))
459 qemu_opt_set(opts, "ipv4", "on");
460 if (strstr(optstr, ",ipv6"))
461 qemu_opt_set(opts, "ipv6", "on");
465 int inet_listen(const char *str, char *ostr, int olen,
466 int socktype, int port_offset, Error **errp)
472 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
473 if (inet_parse(opts, str) == 0) {
474 sock = inet_listen_opts(opts, port_offset, errp);
475 if (sock != -1 && ostr) {
476 optstr = strchr(str, ',');
477 if (qemu_opt_get_bool(opts, "ipv6", 0)) {
478 snprintf(ostr, olen, "[%s]:%s%s",
479 qemu_opt_get(opts, "host"),
480 qemu_opt_get(opts, "port"),
481 optstr ? optstr : "");
483 snprintf(ostr, olen, "%s:%s%s",
484 qemu_opt_get(opts, "host"),
485 qemu_opt_get(opts, "port"),
486 optstr ? optstr : "");
490 error_set(errp, QERR_SOCKET_CREATE_FAILED);
496 int inet_connect(const char *str, bool block, bool *in_progress, Error **errp)
501 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
502 if (inet_parse(opts, str) == 0) {
504 qemu_opt_set(opts, "block", "on");
506 sock = inet_connect_opts(opts, in_progress, errp);
508 error_set(errp, QERR_SOCKET_CREATE_FAILED);
516 int unix_listen_opts(QemuOpts *opts)
518 struct sockaddr_un un;
519 const char *path = qemu_opt_get(opts, "path");
522 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
524 perror("socket(unix)");
528 memset(&un, 0, sizeof(un));
529 un.sun_family = AF_UNIX;
530 if (path && strlen(path)) {
531 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
533 char *tmpdir = getenv("TMPDIR");
534 snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
535 tmpdir ? tmpdir : "/tmp");
537 * This dummy fd usage silences the mktemp() unsecure warning.
538 * Using mkstemp() doesn't make things more secure here
539 * though. bind() complains about existing files, so we have
540 * to unlink first and thus re-open the race window. The
541 * worst case possible is bind() failing, i.e. a DoS attack.
543 fd = mkstemp(un.sun_path); close(fd);
544 qemu_opt_set(opts, "path", un.sun_path);
548 if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
549 fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
552 if (listen(sock, 1) < 0) {
553 fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
564 int unix_connect_opts(QemuOpts *opts)
566 struct sockaddr_un un;
567 const char *path = qemu_opt_get(opts, "path");
571 fprintf(stderr, "unix connect: no path specified\n");
575 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
577 perror("socket(unix)");
581 memset(&un, 0, sizeof(un));
582 un.sun_family = AF_UNIX;
583 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
584 if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
585 fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
593 /* compatibility wrapper */
594 int unix_listen(const char *str, char *ostr, int olen)
600 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
602 optstr = strchr(str, ',');
606 path = g_malloc(len+1);
607 snprintf(path, len+1, "%.*s", len, str);
608 qemu_opt_set(opts, "path", path);
612 qemu_opt_set(opts, "path", str);
615 sock = unix_listen_opts(opts);
617 if (sock != -1 && ostr)
618 snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
623 int unix_connect(const char *path)
628 opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
629 qemu_opt_set(opts, "path", path);
630 sock = unix_connect_opts(opts);
637 int unix_listen_opts(QemuOpts *opts)
639 fprintf(stderr, "unix sockets are not available on windows\n");
644 int unix_connect_opts(QemuOpts *opts)
646 fprintf(stderr, "unix sockets are not available on windows\n");
651 int unix_listen(const char *path, char *ostr, int olen)
653 fprintf(stderr, "unix sockets are not available on windows\n");
658 int unix_connect(const char *path)
660 fprintf(stderr, "unix sockets are not available on windows\n");
668 static void socket_cleanup(void)
674 int socket_init(void)
680 ret = WSAStartup(MAKEWORD(2,2), &Data);
682 err = WSAGetLastError();
683 fprintf(stderr, "WSAStartup: %d\n", err);
686 atexit(socket_cleanup);