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18#include "qemu/osdep.h"
19
20#ifdef CONFIG_AF_VSOCK
21#include <linux/vm_sockets.h>
22#endif
23
24#include "qemu-common.h"
25#include "monitor/monitor.h"
26#include "qapi/clone-visitor.h"
27#include "qapi/error.h"
28#include "qapi/qapi-visit-sockets.h"
29#include "qemu/sockets.h"
30#include "qemu/main-loop.h"
31#include "qapi/qobject-input-visitor.h"
32#include "qapi/qobject-output-visitor.h"
33#include "qemu/cutils.h"
34#include "trace.h"
35
36#ifndef AI_ADDRCONFIG
37# define AI_ADDRCONFIG 0
38#endif
39
40#ifndef AI_V4MAPPED
41# define AI_V4MAPPED 0
42#endif
43
44#ifndef AI_NUMERICSERV
45# define AI_NUMERICSERV 0
46#endif
47
48
49static int inet_getport(struct addrinfo *e)
50{
51 struct sockaddr_in *i4;
52 struct sockaddr_in6 *i6;
53
54 switch (e->ai_family) {
55 case PF_INET6:
56 i6 = (void*)e->ai_addr;
57 return ntohs(i6->sin6_port);
58 case PF_INET:
59 i4 = (void*)e->ai_addr;
60 return ntohs(i4->sin_port);
61 default:
62 return 0;
63 }
64}
65
66static void inet_setport(struct addrinfo *e, int port)
67{
68 struct sockaddr_in *i4;
69 struct sockaddr_in6 *i6;
70
71 switch (e->ai_family) {
72 case PF_INET6:
73 i6 = (void*)e->ai_addr;
74 i6->sin6_port = htons(port);
75 break;
76 case PF_INET:
77 i4 = (void*)e->ai_addr;
78 i4->sin_port = htons(port);
79 break;
80 }
81}
82
83NetworkAddressFamily inet_netfamily(int family)
84{
85 switch (family) {
86 case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6;
87 case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4;
88 case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX;
89#ifdef CONFIG_AF_VSOCK
90 case PF_VSOCK: return NETWORK_ADDRESS_FAMILY_VSOCK;
91#endif
92 }
93 return NETWORK_ADDRESS_FAMILY_UNKNOWN;
94}
95
96bool fd_is_socket(int fd)
97{
98 int optval;
99 socklen_t optlen = sizeof(optval);
100 return !qemu_getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen);
101}
102
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126
127int inet_ai_family_from_address(InetSocketAddress *addr,
128 Error **errp)
129{
130 if (addr->has_ipv6 && addr->has_ipv4 &&
131 !addr->ipv6 && !addr->ipv4) {
132 error_setg(errp, "Cannot disable IPv4 and IPv6 at same time");
133 return PF_UNSPEC;
134 }
135 if ((addr->has_ipv6 && addr->ipv6) && (addr->has_ipv4 && addr->ipv4)) {
136
137
138
139
140
141
142
143
144
145
146 if (!addr->host || g_str_equal(addr->host, "")) {
147 return PF_INET6;
148 } else {
149 return PF_UNSPEC;
150 }
151 }
152 if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) {
153 return PF_INET6;
154 }
155 if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) {
156 return PF_INET;
157 }
158 return PF_UNSPEC;
159}
160
161static int create_fast_reuse_socket(struct addrinfo *e)
162{
163 int slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
164 if (slisten < 0) {
165 return -1;
166 }
167 socket_set_fast_reuse(slisten);
168 return slisten;
169}
170
171static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e)
172{
173#ifndef IPV6_V6ONLY
174 return bind(socket, e->ai_addr, e->ai_addrlen);
175#else
176
177
178
179
180 int v6only =
181 ((!saddr->has_ipv4 && !saddr->has_ipv6) ||
182 (saddr->has_ipv4 && saddr->ipv4 &&
183 saddr->has_ipv6 && saddr->ipv6)) ? 0 : 1;
184 int stat;
185
186 rebind:
187 if (e->ai_family == PF_INET6) {
188 qemu_setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &v6only,
189 sizeof(v6only));
190 }
191
192 stat = bind(socket, e->ai_addr, e->ai_addrlen);
193 if (!stat) {
194 return 0;
195 }
196
197
198
199
200
201 if (e->ai_family == PF_INET6 && errno == EADDRINUSE && !v6only) {
202 v6only = 1;
203 goto rebind;
204 }
205 return stat;
206#endif
207}
208
209static int inet_listen_saddr(InetSocketAddress *saddr,
210 int port_offset,
211 int num,
212 Error **errp)
213{
214 struct addrinfo ai,*res,*e;
215 char port[33];
216 char uaddr[INET6_ADDRSTRLEN+1];
217 char uport[33];
218 int rc, port_min, port_max, p;
219 int slisten = -1;
220 int saved_errno = 0;
221 bool socket_created = false;
222 Error *err = NULL;
223
224 if (saddr->keep_alive) {
225 error_setg(errp, "keep-alive option is not supported for passive "
226 "sockets");
227 return -1;
228 }
229
230 memset(&ai,0, sizeof(ai));
231 ai.ai_flags = AI_PASSIVE;
232 if (saddr->has_numeric && saddr->numeric) {
233 ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
234 }
235 ai.ai_family = inet_ai_family_from_address(saddr, &err);
236 ai.ai_socktype = SOCK_STREAM;
237
238 if (err) {
239 error_propagate(errp, err);
240 return -1;
241 }
242
243 if (saddr->host == NULL) {
244 error_setg(errp, "host not specified");
245 return -1;
246 }
247 if (saddr->port != NULL) {
248 pstrcpy(port, sizeof(port), saddr->port);
249 } else {
250 port[0] = '\0';
251 }
252
253
254 if (port_offset) {
255 unsigned long long baseport;
256 if (strlen(port) == 0) {
257 error_setg(errp, "port not specified");
258 return -1;
259 }
260 if (parse_uint_full(port, &baseport, 10) < 0) {
261 error_setg(errp, "can't convert to a number: %s", port);
262 return -1;
263 }
264 if (baseport > 65535 ||
265 baseport + port_offset > 65535) {
266 error_setg(errp, "port %s out of range", port);
267 return -1;
268 }
269 snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
270 }
271 rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL,
272 strlen(port) ? port : NULL, &ai, &res);
273 if (rc != 0) {
274 error_setg(errp, "address resolution failed for %s:%s: %s",
275 saddr->host, port, gai_strerror(rc));
276 return -1;
277 }
278
279
280 for (e = res; e != NULL; e = e->ai_next) {
281#ifdef HAVE_IPPROTO_MPTCP
282 if (saddr->has_mptcp && saddr->mptcp) {
283 e->ai_protocol = IPPROTO_MPTCP;
284 }
285#endif
286 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
287 uaddr,INET6_ADDRSTRLEN,uport,32,
288 NI_NUMERICHOST | NI_NUMERICSERV);
289
290 port_min = inet_getport(e);
291 port_max = saddr->has_to ? saddr->to + port_offset : port_min;
292 for (p = port_min; p <= port_max; p++) {
293 inet_setport(e, p);
294
295 slisten = create_fast_reuse_socket(e);
296 if (slisten < 0) {
297
298
299
300
301
302 if (p == port_min) {
303 continue;
304 } else {
305 error_setg_errno(errp, errno,
306 "Failed to recreate failed listening socket");
307 goto listen_failed;
308 }
309 }
310 socket_created = true;
311
312 rc = try_bind(slisten, saddr, e);
313 if (rc < 0) {
314 if (errno != EADDRINUSE) {
315 error_setg_errno(errp, errno, "Failed to bind socket");
316 goto listen_failed;
317 }
318 } else {
319 if (!listen(slisten, num)) {
320 goto listen_ok;
321 }
322 if (errno != EADDRINUSE) {
323 error_setg_errno(errp, errno, "Failed to listen on socket");
324 goto listen_failed;
325 }
326 }
327
328
329
330
331
332 closesocket(slisten);
333 slisten = -1;
334 }
335 }
336 error_setg_errno(errp, errno,
337 socket_created ?
338 "Failed to find an available port" :
339 "Failed to create a socket");
340listen_failed:
341 saved_errno = errno;
342 if (slisten >= 0) {
343 closesocket(slisten);
344 }
345 freeaddrinfo(res);
346 errno = saved_errno;
347 return -1;
348
349listen_ok:
350 freeaddrinfo(res);
351 return slisten;
352}
353
354#ifdef _WIN32
355#define QEMU_SOCKET_RC_INPROGRESS(rc) \
356 ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
357#else
358#define QEMU_SOCKET_RC_INPROGRESS(rc) \
359 ((rc) == -EINPROGRESS)
360#endif
361
362static int inet_connect_addr(const InetSocketAddress *saddr,
363 struct addrinfo *addr, Error **errp)
364{
365 int sock, rc;
366
367 sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
368 if (sock < 0) {
369 error_setg_errno(errp, errno, "Failed to create socket family %d",
370 addr->ai_family);
371 return -1;
372 }
373 socket_set_fast_reuse(sock);
374
375
376 do {
377 rc = 0;
378 if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
379 rc = -errno;
380 }
381 } while (rc == -EINTR);
382
383 if (rc < 0) {
384 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
385 saddr->host, saddr->port);
386 closesocket(sock);
387 return -1;
388 }
389
390 return sock;
391}
392
393static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr,
394 Error **errp)
395{
396 struct addrinfo ai, *res;
397 int rc;
398 Error *err = NULL;
399 static int useV4Mapped = 1;
400
401 memset(&ai, 0, sizeof(ai));
402
403 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
404 if (qatomic_read(&useV4Mapped)) {
405 ai.ai_flags |= AI_V4MAPPED;
406 }
407 ai.ai_family = inet_ai_family_from_address(saddr, &err);
408 ai.ai_socktype = SOCK_STREAM;
409
410 if (err) {
411 error_propagate(errp, err);
412 return NULL;
413 }
414
415 if (saddr->host == NULL || saddr->port == NULL) {
416 error_setg(errp, "host and/or port not specified");
417 return NULL;
418 }
419
420
421 rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
422
423
424
425
426
427
428 if (rc == EAI_BADFLAGS &&
429 (ai.ai_flags & AI_V4MAPPED)) {
430 qatomic_set(&useV4Mapped, 0);
431 ai.ai_flags &= ~AI_V4MAPPED;
432 rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
433 }
434 if (rc != 0) {
435 error_setg(errp, "address resolution failed for %s:%s: %s",
436 saddr->host, saddr->port, gai_strerror(rc));
437 return NULL;
438 }
439 return res;
440}
441
442
443
444
445
446
447
448
449
450int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
451{
452 Error *local_err = NULL;
453 struct addrinfo *res, *e;
454 int sock = -1;
455
456 res = inet_parse_connect_saddr(saddr, errp);
457 if (!res) {
458 return -1;
459 }
460
461 for (e = res; e != NULL; e = e->ai_next) {
462 error_free(local_err);
463 local_err = NULL;
464
465#ifdef HAVE_IPPROTO_MPTCP
466 if (saddr->has_mptcp && saddr->mptcp) {
467 e->ai_protocol = IPPROTO_MPTCP;
468 }
469#endif
470
471 sock = inet_connect_addr(saddr, e, &local_err);
472 if (sock >= 0) {
473 break;
474 }
475 }
476
477 freeaddrinfo(res);
478
479 if (sock < 0) {
480 error_propagate(errp, local_err);
481 return sock;
482 }
483
484 if (saddr->keep_alive) {
485 int val = 1;
486 int ret = qemu_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
487 &val, sizeof(val));
488
489 if (ret < 0) {
490 error_setg_errno(errp, errno, "Unable to set KEEPALIVE");
491 close(sock);
492 return -1;
493 }
494 }
495
496 return sock;
497}
498
499static int inet_dgram_saddr(InetSocketAddress *sraddr,
500 InetSocketAddress *sladdr,
501 Error **errp)
502{
503 struct addrinfo ai, *peer = NULL, *local = NULL;
504 const char *addr;
505 const char *port;
506 int sock = -1, rc;
507 Error *err = NULL;
508
509
510 memset(&ai,0, sizeof(ai));
511 ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG;
512 ai.ai_family = inet_ai_family_from_address(sraddr, &err);
513 ai.ai_socktype = SOCK_DGRAM;
514
515 if (err) {
516 error_propagate(errp, err);
517 goto err;
518 }
519
520 addr = sraddr->host;
521 port = sraddr->port;
522 if (addr == NULL || strlen(addr) == 0) {
523 addr = "localhost";
524 }
525 if (port == NULL || strlen(port) == 0) {
526 error_setg(errp, "remote port not specified");
527 goto err;
528 }
529
530 if ((rc = getaddrinfo(addr, port, &ai, &peer)) != 0) {
531 error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
532 gai_strerror(rc));
533 goto err;
534 }
535
536
537 memset(&ai,0, sizeof(ai));
538 ai.ai_flags = AI_PASSIVE;
539 ai.ai_family = peer->ai_family;
540 ai.ai_socktype = SOCK_DGRAM;
541
542 if (sladdr) {
543 addr = sladdr->host;
544 port = sladdr->port;
545 if (addr == NULL || strlen(addr) == 0) {
546 addr = NULL;
547 }
548 if (!port || strlen(port) == 0) {
549 port = "0";
550 }
551 } else {
552 addr = NULL;
553 port = "0";
554 }
555
556 if ((rc = getaddrinfo(addr, port, &ai, &local)) != 0) {
557 error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
558 gai_strerror(rc));
559 goto err;
560 }
561
562
563 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
564 if (sock < 0) {
565 error_setg_errno(errp, errno, "Failed to create socket family %d",
566 peer->ai_family);
567 goto err;
568 }
569 socket_set_fast_reuse(sock);
570
571
572 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
573 error_setg_errno(errp, errno, "Failed to bind socket");
574 goto err;
575 }
576
577
578 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
579 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
580 addr, port);
581 goto err;
582 }
583
584 freeaddrinfo(local);
585 freeaddrinfo(peer);
586 return sock;
587
588err:
589 if (sock != -1) {
590 closesocket(sock);
591 }
592 if (local) {
593 freeaddrinfo(local);
594 }
595 if (peer) {
596 freeaddrinfo(peer);
597 }
598
599 return -1;
600}
601
602
603static int inet_parse_flag(const char *flagname, const char *optstr, bool *val,
604 Error **errp)
605{
606 char *end;
607 size_t len;
608
609 end = strstr(optstr, ",");
610 if (end) {
611 if (end[1] == ',') {
612 error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
613 return -1;
614 }
615 len = end - optstr;
616 } else {
617 len = strlen(optstr);
618 }
619 if (len == 0 || (len == 3 && strncmp(optstr, "=on", len) == 0)) {
620 *val = true;
621 } else if (len == 4 && strncmp(optstr, "=off", len) == 0) {
622 *val = false;
623 } else {
624 error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
625 return -1;
626 }
627 return 0;
628}
629
630int inet_parse(InetSocketAddress *addr, const char *str, Error **errp)
631{
632 const char *optstr, *h;
633 char host[65];
634 char port[33];
635 int to;
636 int pos;
637 char *begin;
638
639 memset(addr, 0, sizeof(*addr));
640
641
642 if (str[0] == ':') {
643
644 host[0] = '\0';
645 if (sscanf(str, ":%32[^,]%n", port, &pos) != 1) {
646 error_setg(errp, "error parsing port in address '%s'", str);
647 return -1;
648 }
649 } else if (str[0] == '[') {
650
651 if (sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos) != 2) {
652 error_setg(errp, "error parsing IPv6 address '%s'", str);
653 return -1;
654 }
655 } else {
656
657 if (sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos) != 2) {
658 error_setg(errp, "error parsing address '%s'", str);
659 return -1;
660 }
661 }
662
663 addr->host = g_strdup(host);
664 addr->port = g_strdup(port);
665
666
667 optstr = str + pos;
668 h = strstr(optstr, ",to=");
669 if (h) {
670 h += 4;
671 if (sscanf(h, "%d%n", &to, &pos) != 1 ||
672 (h[pos] != '\0' && h[pos] != ',')) {
673 error_setg(errp, "error parsing to= argument");
674 return -1;
675 }
676 addr->has_to = true;
677 addr->to = to;
678 }
679 begin = strstr(optstr, ",ipv4");
680 if (begin) {
681 if (inet_parse_flag("ipv4", begin + 5, &addr->ipv4, errp) < 0) {
682 return -1;
683 }
684 addr->has_ipv4 = true;
685 }
686 begin = strstr(optstr, ",ipv6");
687 if (begin) {
688 if (inet_parse_flag("ipv6", begin + 5, &addr->ipv6, errp) < 0) {
689 return -1;
690 }
691 addr->has_ipv6 = true;
692 }
693 begin = strstr(optstr, ",keep-alive");
694 if (begin) {
695 if (inet_parse_flag("keep-alive", begin + strlen(",keep-alive"),
696 &addr->keep_alive, errp) < 0)
697 {
698 return -1;
699 }
700 addr->has_keep_alive = true;
701 }
702#ifdef HAVE_IPPROTO_MPTCP
703 begin = strstr(optstr, ",mptcp");
704 if (begin) {
705 if (inet_parse_flag("mptcp", begin + strlen(",mptcp"),
706 &addr->mptcp, errp) < 0)
707 {
708 return -1;
709 }
710 addr->has_mptcp = true;
711 }
712#endif
713 return 0;
714}
715
716
717
718
719
720
721
722
723
724
725int inet_connect(const char *str, Error **errp)
726{
727 int sock = -1;
728 InetSocketAddress *addr = g_new(InetSocketAddress, 1);
729
730 if (!inet_parse(addr, str, errp)) {
731 sock = inet_connect_saddr(addr, errp);
732 }
733 qapi_free_InetSocketAddress(addr);
734 return sock;
735}
736
737#ifdef CONFIG_AF_VSOCK
738static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr,
739 struct sockaddr_vm *svm,
740 Error **errp)
741{
742 unsigned long long val;
743
744 memset(svm, 0, sizeof(*svm));
745 svm->svm_family = AF_VSOCK;
746
747 if (parse_uint_full(vaddr->cid, &val, 10) < 0 ||
748 val > UINT32_MAX) {
749 error_setg(errp, "Failed to parse cid '%s'", vaddr->cid);
750 return false;
751 }
752 svm->svm_cid = val;
753
754 if (parse_uint_full(vaddr->port, &val, 10) < 0 ||
755 val > UINT32_MAX) {
756 error_setg(errp, "Failed to parse port '%s'", vaddr->port);
757 return false;
758 }
759 svm->svm_port = val;
760
761 return true;
762}
763
764static int vsock_connect_addr(const VsockSocketAddress *vaddr,
765 const struct sockaddr_vm *svm, Error **errp)
766{
767 int sock, rc;
768
769 sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
770 if (sock < 0) {
771 error_setg_errno(errp, errno, "Failed to create socket family %d",
772 AF_VSOCK);
773 return -1;
774 }
775
776
777 do {
778 rc = 0;
779 if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) {
780 rc = -errno;
781 }
782 } while (rc == -EINTR);
783
784 if (rc < 0) {
785 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
786 vaddr->cid, vaddr->port);
787 closesocket(sock);
788 return -1;
789 }
790
791 return sock;
792}
793
794static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
795{
796 struct sockaddr_vm svm;
797
798 if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
799 return -1;
800 }
801
802 return vsock_connect_addr(vaddr, &svm, errp);
803}
804
805static int vsock_listen_saddr(VsockSocketAddress *vaddr,
806 int num,
807 Error **errp)
808{
809 struct sockaddr_vm svm;
810 int slisten;
811
812 if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
813 return -1;
814 }
815
816 slisten = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
817 if (slisten < 0) {
818 error_setg_errno(errp, errno, "Failed to create socket");
819 return -1;
820 }
821
822 if (bind(slisten, (const struct sockaddr *)&svm, sizeof(svm)) != 0) {
823 error_setg_errno(errp, errno, "Failed to bind socket");
824 closesocket(slisten);
825 return -1;
826 }
827
828 if (listen(slisten, num) != 0) {
829 error_setg_errno(errp, errno, "Failed to listen on socket");
830 closesocket(slisten);
831 return -1;
832 }
833 return slisten;
834}
835
836static int vsock_parse(VsockSocketAddress *addr, const char *str,
837 Error **errp)
838{
839 char cid[33];
840 char port[33];
841 int n;
842
843 if (sscanf(str, "%32[^:]:%32[^,]%n", cid, port, &n) != 2) {
844 error_setg(errp, "error parsing address '%s'", str);
845 return -1;
846 }
847 if (str[n] != '\0') {
848 error_setg(errp, "trailing characters in address '%s'", str);
849 return -1;
850 }
851
852 addr->cid = g_strdup(cid);
853 addr->port = g_strdup(port);
854 return 0;
855}
856#else
857static void vsock_unsupported(Error **errp)
858{
859 error_setg(errp, "socket family AF_VSOCK unsupported");
860}
861
862static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
863{
864 vsock_unsupported(errp);
865 return -1;
866}
867
868static int vsock_listen_saddr(VsockSocketAddress *vaddr,
869 int num,
870 Error **errp)
871{
872 vsock_unsupported(errp);
873 return -1;
874}
875
876static int vsock_parse(VsockSocketAddress *addr, const char *str,
877 Error **errp)
878{
879 vsock_unsupported(errp);
880 return -1;
881}
882#endif
883
884#ifndef _WIN32
885
886static bool saddr_is_abstract(UnixSocketAddress *saddr)
887{
888#ifdef CONFIG_LINUX
889 return saddr->abstract;
890#else
891 return false;
892#endif
893}
894
895static bool saddr_is_tight(UnixSocketAddress *saddr)
896{
897#ifdef CONFIG_LINUX
898 return !saddr->has_tight || saddr->tight;
899#else
900 return false;
901#endif
902}
903
904static int unix_listen_saddr(UnixSocketAddress *saddr,
905 int num,
906 Error **errp)
907{
908 bool abstract = saddr_is_abstract(saddr);
909 struct sockaddr_un un;
910 int sock, fd;
911 char *pathbuf = NULL;
912 const char *path;
913 size_t pathlen;
914 size_t addrlen;
915
916 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
917 if (sock < 0) {
918 error_setg_errno(errp, errno, "Failed to create Unix socket");
919 return -1;
920 }
921
922 if (saddr->path[0] || abstract) {
923 path = saddr->path;
924 } else {
925 const char *tmpdir = getenv("TMPDIR");
926 tmpdir = tmpdir ? tmpdir : "/tmp";
927 path = pathbuf = g_strdup_printf("%s/qemu-socket-XXXXXX", tmpdir);
928 }
929
930 pathlen = strlen(path);
931 if (pathlen > sizeof(un.sun_path) ||
932 (abstract && pathlen > (sizeof(un.sun_path) - 1))) {
933 error_setg(errp, "UNIX socket path '%s' is too long", path);
934 error_append_hint(errp, "Path must be less than %zu bytes\n",
935 abstract ? sizeof(un.sun_path) - 1 :
936 sizeof(un.sun_path));
937 goto err;
938 }
939
940 if (pathbuf != NULL) {
941
942
943
944
945
946
947
948 fd = mkstemp(pathbuf);
949 if (fd < 0) {
950 error_setg_errno(errp, errno,
951 "Failed to make a temporary socket %s", pathbuf);
952 goto err;
953 }
954 close(fd);
955 }
956
957 if (!abstract && unlink(path) < 0 && errno != ENOENT) {
958 error_setg_errno(errp, errno,
959 "Failed to unlink socket %s", path);
960 goto err;
961 }
962
963 memset(&un, 0, sizeof(un));
964 un.sun_family = AF_UNIX;
965 addrlen = sizeof(un);
966
967 if (abstract) {
968 un.sun_path[0] = '\0';
969 memcpy(&un.sun_path[1], path, pathlen);
970 if (saddr_is_tight(saddr)) {
971 addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
972 }
973 } else {
974 memcpy(un.sun_path, path, pathlen);
975 }
976
977 if (bind(sock, (struct sockaddr *) &un, addrlen) < 0) {
978 error_setg_errno(errp, errno, "Failed to bind socket to %s", path);
979 goto err;
980 }
981 if (listen(sock, num) < 0) {
982 error_setg_errno(errp, errno, "Failed to listen on socket");
983 goto err;
984 }
985
986 g_free(pathbuf);
987 return sock;
988
989err:
990 g_free(pathbuf);
991 closesocket(sock);
992 return -1;
993}
994
995static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
996{
997 bool abstract = saddr_is_abstract(saddr);
998 struct sockaddr_un un;
999 int sock, rc;
1000 size_t pathlen;
1001 size_t addrlen;
1002
1003 if (saddr->path == NULL) {
1004 error_setg(errp, "unix connect: no path specified");
1005 return -1;
1006 }
1007
1008 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
1009 if (sock < 0) {
1010 error_setg_errno(errp, errno, "Failed to create socket");
1011 return -1;
1012 }
1013
1014 pathlen = strlen(saddr->path);
1015 if (pathlen > sizeof(un.sun_path) ||
1016 (abstract && pathlen > (sizeof(un.sun_path) - 1))) {
1017 error_setg(errp, "UNIX socket path '%s' is too long", saddr->path);
1018 error_append_hint(errp, "Path must be less than %zu bytes\n",
1019 abstract ? sizeof(un.sun_path) - 1 :
1020 sizeof(un.sun_path));
1021 goto err;
1022 }
1023
1024 memset(&un, 0, sizeof(un));
1025 un.sun_family = AF_UNIX;
1026 addrlen = sizeof(un);
1027
1028 if (abstract) {
1029 un.sun_path[0] = '\0';
1030 memcpy(&un.sun_path[1], saddr->path, pathlen);
1031 if (saddr_is_tight(saddr)) {
1032 addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
1033 }
1034 } else {
1035 memcpy(un.sun_path, saddr->path, pathlen);
1036 }
1037
1038 do {
1039 rc = 0;
1040 if (connect(sock, (struct sockaddr *) &un, addrlen) < 0) {
1041 rc = -errno;
1042 }
1043 } while (rc == -EINTR);
1044
1045 if (rc < 0) {
1046 error_setg_errno(errp, -rc, "Failed to connect to '%s'",
1047 saddr->path);
1048 goto err;
1049 }
1050
1051 return sock;
1052
1053 err:
1054 close(sock);
1055 return -1;
1056}
1057
1058#else
1059
1060static int unix_listen_saddr(UnixSocketAddress *saddr,
1061 int num,
1062 Error **errp)
1063{
1064 error_setg(errp, "unix sockets are not available on windows");
1065 errno = ENOTSUP;
1066 return -1;
1067}
1068
1069static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
1070{
1071 error_setg(errp, "unix sockets are not available on windows");
1072 errno = ENOTSUP;
1073 return -1;
1074}
1075#endif
1076
1077
1078int unix_listen(const char *str, Error **errp)
1079{
1080 UnixSocketAddress *saddr;
1081 int sock;
1082
1083 saddr = g_new0(UnixSocketAddress, 1);
1084 saddr->path = g_strdup(str);
1085 sock = unix_listen_saddr(saddr, 1, errp);
1086 qapi_free_UnixSocketAddress(saddr);
1087 return sock;
1088}
1089
1090int unix_connect(const char *path, Error **errp)
1091{
1092 UnixSocketAddress *saddr;
1093 int sock;
1094
1095 saddr = g_new0(UnixSocketAddress, 1);
1096 saddr->path = g_strdup(path);
1097 sock = unix_connect_saddr(saddr, errp);
1098 qapi_free_UnixSocketAddress(saddr);
1099 return sock;
1100}
1101
1102
1103SocketAddress *socket_parse(const char *str, Error **errp)
1104{
1105 SocketAddress *addr;
1106
1107 addr = g_new0(SocketAddress, 1);
1108 if (strstart(str, "unix:", NULL)) {
1109 if (str[5] == '\0') {
1110 error_setg(errp, "invalid Unix socket address");
1111 goto fail;
1112 } else {
1113 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1114 addr->u.q_unix.path = g_strdup(str + 5);
1115 }
1116 } else if (strstart(str, "fd:", NULL)) {
1117 if (str[3] == '\0') {
1118 error_setg(errp, "invalid file descriptor address");
1119 goto fail;
1120 } else {
1121 addr->type = SOCKET_ADDRESS_TYPE_FD;
1122 addr->u.fd.str = g_strdup(str + 3);
1123 }
1124 } else if (strstart(str, "vsock:", NULL)) {
1125 addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
1126 if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
1127 goto fail;
1128 }
1129 } else {
1130 addr->type = SOCKET_ADDRESS_TYPE_INET;
1131 if (inet_parse(&addr->u.inet, str, errp)) {
1132 goto fail;
1133 }
1134 }
1135 return addr;
1136
1137fail:
1138 qapi_free_SocketAddress(addr);
1139 return NULL;
1140}
1141
1142static int socket_get_fd(const char *fdstr, Error **errp)
1143{
1144 Monitor *cur_mon = monitor_cur();
1145 int fd;
1146 if (cur_mon) {
1147 fd = monitor_get_fd(cur_mon, fdstr, errp);
1148 if (fd < 0) {
1149 return -1;
1150 }
1151 } else {
1152 if (qemu_strtoi(fdstr, NULL, 10, &fd) < 0) {
1153 error_setg_errno(errp, errno,
1154 "Unable to parse FD number %s",
1155 fdstr);
1156 return -1;
1157 }
1158 }
1159 if (!fd_is_socket(fd)) {
1160 error_setg(errp, "File descriptor '%s' is not a socket", fdstr);
1161 close(fd);
1162 return -1;
1163 }
1164 return fd;
1165}
1166
1167int socket_address_parse_named_fd(SocketAddress *addr, Error **errp)
1168{
1169 int fd;
1170
1171 if (addr->type != SOCKET_ADDRESS_TYPE_FD) {
1172 return 0;
1173 }
1174
1175 fd = socket_get_fd(addr->u.fd.str, errp);
1176 if (fd < 0) {
1177 return fd;
1178 }
1179
1180 g_free(addr->u.fd.str);
1181 addr->u.fd.str = g_strdup_printf("%d", fd);
1182
1183 return 0;
1184}
1185
1186int socket_connect(SocketAddress *addr, Error **errp)
1187{
1188 int fd;
1189
1190 switch (addr->type) {
1191 case SOCKET_ADDRESS_TYPE_INET:
1192 fd = inet_connect_saddr(&addr->u.inet, errp);
1193 break;
1194
1195 case SOCKET_ADDRESS_TYPE_UNIX:
1196 fd = unix_connect_saddr(&addr->u.q_unix, errp);
1197 break;
1198
1199 case SOCKET_ADDRESS_TYPE_FD:
1200 fd = socket_get_fd(addr->u.fd.str, errp);
1201 break;
1202
1203 case SOCKET_ADDRESS_TYPE_VSOCK:
1204 fd = vsock_connect_saddr(&addr->u.vsock, errp);
1205 break;
1206
1207 default:
1208 abort();
1209 }
1210 return fd;
1211}
1212
1213int socket_listen(SocketAddress *addr, int num, Error **errp)
1214{
1215 int fd;
1216
1217 trace_socket_listen(num);
1218 switch (addr->type) {
1219 case SOCKET_ADDRESS_TYPE_INET:
1220 fd = inet_listen_saddr(&addr->u.inet, 0, num, errp);
1221 break;
1222
1223 case SOCKET_ADDRESS_TYPE_UNIX:
1224 fd = unix_listen_saddr(&addr->u.q_unix, num, errp);
1225 break;
1226
1227 case SOCKET_ADDRESS_TYPE_FD:
1228 fd = socket_get_fd(addr->u.fd.str, errp);
1229 if (fd < 0) {
1230 return -1;
1231 }
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243 if (listen(fd, num) != 0) {
1244 error_setg_errno(errp, errno, "Failed to listen on fd socket");
1245 closesocket(fd);
1246 return -1;
1247 }
1248 break;
1249
1250 case SOCKET_ADDRESS_TYPE_VSOCK:
1251 fd = vsock_listen_saddr(&addr->u.vsock, num, errp);
1252 break;
1253
1254 default:
1255 abort();
1256 }
1257 return fd;
1258}
1259
1260void socket_listen_cleanup(int fd, Error **errp)
1261{
1262 SocketAddress *addr;
1263
1264 addr = socket_local_address(fd, errp);
1265 if (!addr) {
1266 return;
1267 }
1268
1269 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX
1270 && addr->u.q_unix.path) {
1271 if (unlink(addr->u.q_unix.path) < 0 && errno != ENOENT) {
1272 error_setg_errno(errp, errno,
1273 "Failed to unlink socket %s",
1274 addr->u.q_unix.path);
1275 }
1276 }
1277
1278 qapi_free_SocketAddress(addr);
1279}
1280
1281int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
1282{
1283 int fd;
1284
1285
1286
1287
1288
1289 switch (remote->type) {
1290 case SOCKET_ADDRESS_TYPE_INET:
1291 fd = inet_dgram_saddr(&remote->u.inet,
1292 local ? &local->u.inet : NULL, errp);
1293 break;
1294
1295 default:
1296 error_setg(errp, "socket type unsupported for datagram");
1297 fd = -1;
1298 }
1299 return fd;
1300}
1301
1302
1303static SocketAddress *
1304socket_sockaddr_to_address_inet(struct sockaddr_storage *sa,
1305 socklen_t salen,
1306 Error **errp)
1307{
1308 char host[NI_MAXHOST];
1309 char serv[NI_MAXSERV];
1310 SocketAddress *addr;
1311 InetSocketAddress *inet;
1312 int ret;
1313
1314 ret = getnameinfo((struct sockaddr *)sa, salen,
1315 host, sizeof(host),
1316 serv, sizeof(serv),
1317 NI_NUMERICHOST | NI_NUMERICSERV);
1318 if (ret != 0) {
1319 error_setg(errp, "Cannot format numeric socket address: %s",
1320 gai_strerror(ret));
1321 return NULL;
1322 }
1323
1324 addr = g_new0(SocketAddress, 1);
1325 addr->type = SOCKET_ADDRESS_TYPE_INET;
1326 inet = &addr->u.inet;
1327 inet->host = g_strdup(host);
1328 inet->port = g_strdup(serv);
1329 if (sa->ss_family == AF_INET) {
1330 inet->has_ipv4 = inet->ipv4 = true;
1331 } else {
1332 inet->has_ipv6 = inet->ipv6 = true;
1333 }
1334
1335 return addr;
1336}
1337
1338
1339#ifndef WIN32
1340static SocketAddress *
1341socket_sockaddr_to_address_unix(struct sockaddr_storage *sa,
1342 socklen_t salen,
1343 Error **errp)
1344{
1345 SocketAddress *addr;
1346 struct sockaddr_un *su = (struct sockaddr_un *)sa;
1347
1348 addr = g_new0(SocketAddress, 1);
1349 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1350 salen -= offsetof(struct sockaddr_un, sun_path);
1351#ifdef CONFIG_LINUX
1352 if (salen > 0 && !su->sun_path[0]) {
1353
1354 addr->u.q_unix.path = g_strndup(su->sun_path + 1, salen - 1);
1355 addr->u.q_unix.has_abstract = true;
1356 addr->u.q_unix.abstract = true;
1357 addr->u.q_unix.has_tight = true;
1358 addr->u.q_unix.tight = salen < sizeof(su->sun_path);
1359 return addr;
1360 }
1361#endif
1362
1363 addr->u.q_unix.path = g_strndup(su->sun_path, salen);
1364 return addr;
1365}
1366#endif
1367
1368#ifdef CONFIG_AF_VSOCK
1369static SocketAddress *
1370socket_sockaddr_to_address_vsock(struct sockaddr_storage *sa,
1371 socklen_t salen,
1372 Error **errp)
1373{
1374 SocketAddress *addr;
1375 VsockSocketAddress *vaddr;
1376 struct sockaddr_vm *svm = (struct sockaddr_vm *)sa;
1377
1378 addr = g_new0(SocketAddress, 1);
1379 addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
1380 vaddr = &addr->u.vsock;
1381 vaddr->cid = g_strdup_printf("%u", svm->svm_cid);
1382 vaddr->port = g_strdup_printf("%u", svm->svm_port);
1383
1384 return addr;
1385}
1386#endif
1387
1388SocketAddress *
1389socket_sockaddr_to_address(struct sockaddr_storage *sa,
1390 socklen_t salen,
1391 Error **errp)
1392{
1393 switch (sa->ss_family) {
1394 case AF_INET:
1395 case AF_INET6:
1396 return socket_sockaddr_to_address_inet(sa, salen, errp);
1397
1398#ifndef WIN32
1399 case AF_UNIX:
1400 return socket_sockaddr_to_address_unix(sa, salen, errp);
1401#endif
1402
1403#ifdef CONFIG_AF_VSOCK
1404 case AF_VSOCK:
1405 return socket_sockaddr_to_address_vsock(sa, salen, errp);
1406#endif
1407
1408 default:
1409 error_setg(errp, "socket family %d unsupported",
1410 sa->ss_family);
1411 return NULL;
1412 }
1413 return 0;
1414}
1415
1416
1417SocketAddress *socket_local_address(int fd, Error **errp)
1418{
1419 struct sockaddr_storage ss;
1420 socklen_t sslen = sizeof(ss);
1421
1422 if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) {
1423 error_setg_errno(errp, errno, "%s",
1424 "Unable to query local socket address");
1425 return NULL;
1426 }
1427
1428 return socket_sockaddr_to_address(&ss, sslen, errp);
1429}
1430
1431
1432SocketAddress *socket_remote_address(int fd, Error **errp)
1433{
1434 struct sockaddr_storage ss;
1435 socklen_t sslen = sizeof(ss);
1436
1437 if (getpeername(fd, (struct sockaddr *)&ss, &sslen) < 0) {
1438 error_setg_errno(errp, errno, "%s",
1439 "Unable to query remote socket address");
1440 return NULL;
1441 }
1442
1443 return socket_sockaddr_to_address(&ss, sslen, errp);
1444}
1445
1446
1447SocketAddress *socket_address_flatten(SocketAddressLegacy *addr_legacy)
1448{
1449 SocketAddress *addr;
1450
1451 if (!addr_legacy) {
1452 return NULL;
1453 }
1454
1455 addr = g_new(SocketAddress, 1);
1456
1457 switch (addr_legacy->type) {
1458 case SOCKET_ADDRESS_TYPE_INET:
1459 addr->type = SOCKET_ADDRESS_TYPE_INET;
1460 QAPI_CLONE_MEMBERS(InetSocketAddress, &addr->u.inet,
1461 addr_legacy->u.inet.data);
1462 break;
1463 case SOCKET_ADDRESS_TYPE_UNIX:
1464 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1465 QAPI_CLONE_MEMBERS(UnixSocketAddress, &addr->u.q_unix,
1466 addr_legacy->u.q_unix.data);
1467 break;
1468 case SOCKET_ADDRESS_TYPE_VSOCK:
1469 addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
1470 QAPI_CLONE_MEMBERS(VsockSocketAddress, &addr->u.vsock,
1471 addr_legacy->u.vsock.data);
1472 break;
1473 case SOCKET_ADDRESS_TYPE_FD:
1474 addr->type = SOCKET_ADDRESS_TYPE_FD;
1475 QAPI_CLONE_MEMBERS(String, &addr->u.fd, addr_legacy->u.fd.data);
1476 break;
1477 default:
1478 abort();
1479 }
1480
1481 return addr;
1482}
1483