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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 "monitor/monitor.h"
25#include "qapi/clone-visitor.h"
26#include "qapi/error.h"
27#include "qapi/qapi-visit-sockets.h"
28#include "qemu/sockets.h"
29#include "qemu/main-loop.h"
30#include "qapi/qobject-input-visitor.h"
31#include "qapi/qobject-output-visitor.h"
32#include "qemu/cutils.h"
33#include "trace.h"
34
35#ifndef AI_ADDRCONFIG
36# define AI_ADDRCONFIG 0
37#endif
38
39#ifndef AI_V4MAPPED
40# define AI_V4MAPPED 0
41#endif
42
43#ifndef AI_NUMERICSERV
44# define AI_NUMERICSERV 0
45#endif
46
47
48static int inet_getport(struct addrinfo *e)
49{
50 struct sockaddr_in *i4;
51 struct sockaddr_in6 *i6;
52
53 switch (e->ai_family) {
54 case PF_INET6:
55 i6 = (void*)e->ai_addr;
56 return ntohs(i6->sin6_port);
57 case PF_INET:
58 i4 = (void*)e->ai_addr;
59 return ntohs(i4->sin_port);
60 default:
61 return 0;
62 }
63}
64
65static void inet_setport(struct addrinfo *e, int port)
66{
67 struct sockaddr_in *i4;
68 struct sockaddr_in6 *i6;
69
70 switch (e->ai_family) {
71 case PF_INET6:
72 i6 = (void*)e->ai_addr;
73 i6->sin6_port = htons(port);
74 break;
75 case PF_INET:
76 i4 = (void*)e->ai_addr;
77 i4->sin_port = htons(port);
78 break;
79 }
80}
81
82NetworkAddressFamily inet_netfamily(int family)
83{
84 switch (family) {
85 case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6;
86 case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4;
87 case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX;
88#ifdef CONFIG_AF_VSOCK
89 case PF_VSOCK: return NETWORK_ADDRESS_FAMILY_VSOCK;
90#endif
91 }
92 return NETWORK_ADDRESS_FAMILY_UNKNOWN;
93}
94
95bool fd_is_socket(int fd)
96{
97 int optval;
98 socklen_t optlen = sizeof(optval);
99 return !getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen);
100}
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124
125
126int inet_ai_family_from_address(InetSocketAddress *addr,
127 Error **errp)
128{
129 if (addr->has_ipv6 && addr->has_ipv4 &&
130 !addr->ipv6 && !addr->ipv4) {
131 error_setg(errp, "Cannot disable IPv4 and IPv6 at same time");
132 return PF_UNSPEC;
133 }
134 if ((addr->has_ipv6 && addr->ipv6) && (addr->has_ipv4 && addr->ipv4)) {
135
136
137
138
139
140
141
142
143
144
145 if (!addr->host || g_str_equal(addr->host, "")) {
146 return PF_INET6;
147 } else {
148 return PF_UNSPEC;
149 }
150 }
151 if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) {
152 return PF_INET6;
153 }
154 if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) {
155 return PF_INET;
156 }
157 return PF_UNSPEC;
158}
159
160static int create_fast_reuse_socket(struct addrinfo *e)
161{
162 int slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
163 if (slisten < 0) {
164 return -1;
165 }
166 socket_set_fast_reuse(slisten);
167 return slisten;
168}
169
170static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e)
171{
172#ifndef IPV6_V6ONLY
173 return bind(socket, e->ai_addr, e->ai_addrlen);
174#else
175
176
177
178
179 int v6only =
180 ((!saddr->has_ipv4 && !saddr->has_ipv6) ||
181 (saddr->has_ipv4 && saddr->ipv4 &&
182 saddr->has_ipv6 && saddr->ipv6)) ? 0 : 1;
183 int stat;
184
185 rebind:
186 if (e->ai_family == PF_INET6) {
187 setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &v6only,
188 sizeof(v6only));
189 }
190
191 stat = bind(socket, e->ai_addr, e->ai_addrlen);
192 if (!stat) {
193 return 0;
194 }
195
196
197
198
199
200 if (e->ai_family == PF_INET6 && errno == EADDRINUSE && !v6only) {
201 v6only = 1;
202 goto rebind;
203 }
204 return stat;
205#endif
206}
207
208static int inet_listen_saddr(InetSocketAddress *saddr,
209 int port_offset,
210 int num,
211 Error **errp)
212{
213 struct addrinfo ai,*res,*e;
214 char port[33];
215 char uaddr[INET6_ADDRSTRLEN+1];
216 char uport[33];
217 int rc, port_min, port_max, p;
218 int slisten = -1;
219 int saved_errno = 0;
220 bool socket_created = false;
221 Error *err = NULL;
222
223 if (saddr->keep_alive) {
224 error_setg(errp, "keep-alive option is not supported for passive "
225 "sockets");
226 return -1;
227 }
228
229 memset(&ai,0, sizeof(ai));
230 ai.ai_flags = AI_PASSIVE;
231 if (saddr->has_numeric && saddr->numeric) {
232 ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
233 }
234 ai.ai_family = inet_ai_family_from_address(saddr, &err);
235 ai.ai_socktype = SOCK_STREAM;
236
237 if (err) {
238 error_propagate(errp, err);
239 return -1;
240 }
241
242 if (saddr->host == NULL) {
243 error_setg(errp, "host not specified");
244 return -1;
245 }
246 if (saddr->port != NULL) {
247 pstrcpy(port, sizeof(port), saddr->port);
248 } else {
249 port[0] = '\0';
250 }
251
252
253 if (port_offset) {
254 unsigned long long baseport;
255 if (strlen(port) == 0) {
256 error_setg(errp, "port not specified");
257 return -1;
258 }
259 if (parse_uint_full(port, &baseport, 10) < 0) {
260 error_setg(errp, "can't convert to a number: %s", port);
261 return -1;
262 }
263 if (baseport > 65535 ||
264 baseport + port_offset > 65535) {
265 error_setg(errp, "port %s out of range", port);
266 return -1;
267 }
268 snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
269 }
270 rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL,
271 strlen(port) ? port : NULL, &ai, &res);
272 if (rc != 0) {
273 error_setg(errp, "address resolution failed for %s:%s: %s",
274 saddr->host, port, gai_strerror(rc));
275 return -1;
276 }
277
278
279 for (e = res; e != NULL; e = e->ai_next) {
280#ifdef HAVE_IPPROTO_MPTCP
281 if (saddr->has_mptcp && saddr->mptcp) {
282 e->ai_protocol = IPPROTO_MPTCP;
283 }
284#endif
285 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
286 uaddr,INET6_ADDRSTRLEN,uport,32,
287 NI_NUMERICHOST | NI_NUMERICSERV);
288
289 port_min = inet_getport(e);
290 port_max = saddr->has_to ? saddr->to + port_offset : port_min;
291 for (p = port_min; p <= port_max; p++) {
292 inet_setport(e, p);
293
294 slisten = create_fast_reuse_socket(e);
295 if (slisten < 0) {
296
297
298
299
300
301 if (p == port_min) {
302 continue;
303 } else {
304 error_setg_errno(errp, errno,
305 "Failed to recreate failed listening socket");
306 goto listen_failed;
307 }
308 }
309 socket_created = true;
310
311 rc = try_bind(slisten, saddr, e);
312 if (rc < 0) {
313 if (errno != EADDRINUSE) {
314 error_setg_errno(errp, errno, "Failed to bind socket");
315 goto listen_failed;
316 }
317 } else {
318 if (!listen(slisten, num)) {
319 goto listen_ok;
320 }
321 if (errno != EADDRINUSE) {
322 error_setg_errno(errp, errno, "Failed to listen on socket");
323 goto listen_failed;
324 }
325 }
326
327
328
329
330
331 closesocket(slisten);
332 slisten = -1;
333 }
334 }
335 error_setg_errno(errp, errno,
336 socket_created ?
337 "Failed to find an available port" :
338 "Failed to create a socket");
339listen_failed:
340 saved_errno = errno;
341 if (slisten >= 0) {
342 closesocket(slisten);
343 }
344 freeaddrinfo(res);
345 errno = saved_errno;
346 return -1;
347
348listen_ok:
349 freeaddrinfo(res);
350 return slisten;
351}
352
353#ifdef _WIN32
354#define QEMU_SOCKET_RC_INPROGRESS(rc) \
355 ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
356#else
357#define QEMU_SOCKET_RC_INPROGRESS(rc) \
358 ((rc) == -EINPROGRESS)
359#endif
360
361static int inet_connect_addr(const InetSocketAddress *saddr,
362 struct addrinfo *addr, Error **errp)
363{
364 int sock, rc;
365
366 sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
367 if (sock < 0) {
368 error_setg_errno(errp, errno, "Failed to create socket family %d",
369 addr->ai_family);
370 return -1;
371 }
372 socket_set_fast_reuse(sock);
373
374
375 do {
376 rc = 0;
377 if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
378 rc = -errno;
379 }
380 } while (rc == -EINTR);
381
382 if (rc < 0) {
383 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
384 saddr->host, saddr->port);
385 closesocket(sock);
386 return -1;
387 }
388
389 return sock;
390}
391
392static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr,
393 Error **errp)
394{
395 struct addrinfo ai, *res;
396 int rc;
397 Error *err = NULL;
398 static int useV4Mapped = 1;
399
400 memset(&ai, 0, sizeof(ai));
401
402 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
403 if (qatomic_read(&useV4Mapped)) {
404 ai.ai_flags |= AI_V4MAPPED;
405 }
406 ai.ai_family = inet_ai_family_from_address(saddr, &err);
407 ai.ai_socktype = SOCK_STREAM;
408
409 if (err) {
410 error_propagate(errp, err);
411 return NULL;
412 }
413
414 if (saddr->host == NULL || saddr->port == NULL) {
415 error_setg(errp, "host and/or port not specified");
416 return NULL;
417 }
418
419
420 rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
421
422
423
424
425
426
427 if (rc == EAI_BADFLAGS &&
428 (ai.ai_flags & AI_V4MAPPED)) {
429 qatomic_set(&useV4Mapped, 0);
430 ai.ai_flags &= ~AI_V4MAPPED;
431 rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
432 }
433 if (rc != 0) {
434 error_setg(errp, "address resolution failed for %s:%s: %s",
435 saddr->host, saddr->port, gai_strerror(rc));
436 return NULL;
437 }
438 return res;
439}
440
441
442
443
444
445
446
447
448
449int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
450{
451 Error *local_err = NULL;
452 struct addrinfo *res, *e;
453 int sock = -1;
454
455 res = inet_parse_connect_saddr(saddr, errp);
456 if (!res) {
457 return -1;
458 }
459
460 for (e = res; e != NULL; e = e->ai_next) {
461 error_free(local_err);
462 local_err = NULL;
463
464#ifdef HAVE_IPPROTO_MPTCP
465 if (saddr->has_mptcp && saddr->mptcp) {
466 e->ai_protocol = IPPROTO_MPTCP;
467 }
468#endif
469
470 sock = inet_connect_addr(saddr, e, &local_err);
471 if (sock >= 0) {
472 break;
473 }
474 }
475
476 freeaddrinfo(res);
477
478 if (sock < 0) {
479 error_propagate(errp, local_err);
480 return sock;
481 }
482
483 if (saddr->keep_alive) {
484 int val = 1;
485 int ret = setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
486 &val, sizeof(val));
487
488 if (ret < 0) {
489 error_setg_errno(errp, errno, "Unable to set KEEPALIVE");
490 closesocket(sock);
491 return -1;
492 }
493 }
494
495 return sock;
496}
497
498static int inet_dgram_saddr(InetSocketAddress *sraddr,
499 InetSocketAddress *sladdr,
500 Error **errp)
501{
502 struct addrinfo ai, *peer = NULL, *local = NULL;
503 const char *addr;
504 const char *port;
505 int sock = -1, rc;
506 Error *err = NULL;
507
508
509 memset(&ai,0, sizeof(ai));
510 ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG;
511 ai.ai_family = inet_ai_family_from_address(sraddr, &err);
512 ai.ai_socktype = SOCK_DGRAM;
513
514 if (err) {
515 error_propagate(errp, err);
516 goto err;
517 }
518
519 addr = sraddr->host;
520 port = sraddr->port;
521 if (addr == NULL || strlen(addr) == 0) {
522 addr = "localhost";
523 }
524 if (port == NULL || strlen(port) == 0) {
525 error_setg(errp, "remote port not specified");
526 goto err;
527 }
528
529 if ((rc = getaddrinfo(addr, port, &ai, &peer)) != 0) {
530 error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
531 gai_strerror(rc));
532 goto err;
533 }
534
535
536 memset(&ai,0, sizeof(ai));
537 ai.ai_flags = AI_PASSIVE;
538 ai.ai_family = peer->ai_family;
539 ai.ai_socktype = SOCK_DGRAM;
540
541 if (sladdr) {
542 addr = sladdr->host;
543 port = sladdr->port;
544 if (addr == NULL || strlen(addr) == 0) {
545 addr = NULL;
546 }
547 if (!port || strlen(port) == 0) {
548 port = "0";
549 }
550 } else {
551 addr = NULL;
552 port = "0";
553 }
554
555 if ((rc = getaddrinfo(addr, port, &ai, &local)) != 0) {
556 error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
557 gai_strerror(rc));
558 goto err;
559 }
560
561
562 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
563 if (sock < 0) {
564 error_setg_errno(errp, errno, "Failed to create socket family %d",
565 peer->ai_family);
566 goto err;
567 }
568 socket_set_fast_reuse(sock);
569
570
571 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
572 error_setg_errno(errp, errno, "Failed to bind socket");
573 goto err;
574 }
575
576
577 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
578 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
579 addr, port);
580 goto err;
581 }
582
583 freeaddrinfo(local);
584 freeaddrinfo(peer);
585 return sock;
586
587err:
588 if (sock != -1) {
589 closesocket(sock);
590 }
591 if (local) {
592 freeaddrinfo(local);
593 }
594 if (peer) {
595 freeaddrinfo(peer);
596 }
597
598 return -1;
599}
600
601
602static int inet_parse_flag(const char *flagname, const char *optstr, bool *val,
603 Error **errp)
604{
605 char *end;
606 size_t len;
607
608 end = strstr(optstr, ",");
609 if (end) {
610 if (end[1] == ',') {
611 error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
612 return -1;
613 }
614 len = end - optstr;
615 } else {
616 len = strlen(optstr);
617 }
618 if (len == 0 || (len == 3 && strncmp(optstr, "=on", len) == 0)) {
619 *val = true;
620 } else if (len == 4 && strncmp(optstr, "=off", len) == 0) {
621 *val = false;
622 } else {
623 error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
624 return -1;
625 }
626 return 0;
627}
628
629int inet_parse(InetSocketAddress *addr, const char *str, Error **errp)
630{
631 const char *optstr, *h;
632 char host[65];
633 char port[33];
634 int to;
635 int pos;
636 char *begin;
637
638 memset(addr, 0, sizeof(*addr));
639
640
641 if (str[0] == ':') {
642
643 host[0] = '\0';
644 if (sscanf(str, ":%32[^,]%n", port, &pos) != 1) {
645 error_setg(errp, "error parsing port in address '%s'", str);
646 return -1;
647 }
648 } else if (str[0] == '[') {
649
650 if (sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos) != 2) {
651 error_setg(errp, "error parsing IPv6 address '%s'", str);
652 return -1;
653 }
654 } else {
655
656 if (sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos) != 2) {
657 error_setg(errp, "error parsing address '%s'", str);
658 return -1;
659 }
660 }
661
662 addr->host = g_strdup(host);
663 addr->port = g_strdup(port);
664
665
666 optstr = str + pos;
667 h = strstr(optstr, ",to=");
668 if (h) {
669 h += 4;
670 if (sscanf(h, "%d%n", &to, &pos) != 1 ||
671 (h[pos] != '\0' && h[pos] != ',')) {
672 error_setg(errp, "error parsing to= argument");
673 return -1;
674 }
675 addr->has_to = true;
676 addr->to = to;
677 }
678 begin = strstr(optstr, ",ipv4");
679 if (begin) {
680 if (inet_parse_flag("ipv4", begin + 5, &addr->ipv4, errp) < 0) {
681 return -1;
682 }
683 addr->has_ipv4 = true;
684 }
685 begin = strstr(optstr, ",ipv6");
686 if (begin) {
687 if (inet_parse_flag("ipv6", begin + 5, &addr->ipv6, errp) < 0) {
688 return -1;
689 }
690 addr->has_ipv6 = true;
691 }
692 begin = strstr(optstr, ",keep-alive");
693 if (begin) {
694 if (inet_parse_flag("keep-alive", begin + strlen(",keep-alive"),
695 &addr->keep_alive, errp) < 0)
696 {
697 return -1;
698 }
699 addr->has_keep_alive = true;
700 }
701#ifdef HAVE_IPPROTO_MPTCP
702 begin = strstr(optstr, ",mptcp");
703 if (begin) {
704 if (inet_parse_flag("mptcp", begin + strlen(",mptcp"),
705 &addr->mptcp, errp) < 0)
706 {
707 return -1;
708 }
709 addr->has_mptcp = true;
710 }
711#endif
712 return 0;
713}
714
715
716
717
718
719
720
721
722
723
724int inet_connect(const char *str, Error **errp)
725{
726 int sock = -1;
727 InetSocketAddress *addr = g_new(InetSocketAddress, 1);
728
729 if (!inet_parse(addr, str, errp)) {
730 sock = inet_connect_saddr(addr, errp);
731 }
732 qapi_free_InetSocketAddress(addr);
733 return sock;
734}
735
736#ifdef CONFIG_AF_VSOCK
737static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr,
738 struct sockaddr_vm *svm,
739 Error **errp)
740{
741 unsigned long long val;
742
743 memset(svm, 0, sizeof(*svm));
744 svm->svm_family = AF_VSOCK;
745
746 if (parse_uint_full(vaddr->cid, &val, 10) < 0 ||
747 val > UINT32_MAX) {
748 error_setg(errp, "Failed to parse cid '%s'", vaddr->cid);
749 return false;
750 }
751 svm->svm_cid = val;
752
753 if (parse_uint_full(vaddr->port, &val, 10) < 0 ||
754 val > UINT32_MAX) {
755 error_setg(errp, "Failed to parse port '%s'", vaddr->port);
756 return false;
757 }
758 svm->svm_port = val;
759
760 return true;
761}
762
763static int vsock_connect_addr(const VsockSocketAddress *vaddr,
764 const struct sockaddr_vm *svm, Error **errp)
765{
766 int sock, rc;
767
768 sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
769 if (sock < 0) {
770 error_setg_errno(errp, errno, "Failed to create socket family %d",
771 AF_VSOCK);
772 return -1;
773 }
774
775
776 do {
777 rc = 0;
778 if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) {
779 rc = -errno;
780 }
781 } while (rc == -EINTR);
782
783 if (rc < 0) {
784 error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
785 vaddr->cid, vaddr->port);
786 closesocket(sock);
787 return -1;
788 }
789
790 return sock;
791}
792
793static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
794{
795 struct sockaddr_vm svm;
796
797 if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
798 return -1;
799 }
800
801 return vsock_connect_addr(vaddr, &svm, errp);
802}
803
804static int vsock_listen_saddr(VsockSocketAddress *vaddr,
805 int num,
806 Error **errp)
807{
808 struct sockaddr_vm svm;
809 int slisten;
810
811 if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
812 return -1;
813 }
814
815 slisten = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
816 if (slisten < 0) {
817 error_setg_errno(errp, errno, "Failed to create socket");
818 return -1;
819 }
820
821 if (bind(slisten, (const struct sockaddr *)&svm, sizeof(svm)) != 0) {
822 error_setg_errno(errp, errno, "Failed to bind socket");
823 closesocket(slisten);
824 return -1;
825 }
826
827 if (listen(slisten, num) != 0) {
828 error_setg_errno(errp, errno, "Failed to listen on socket");
829 closesocket(slisten);
830 return -1;
831 }
832 return slisten;
833}
834
835static int vsock_parse(VsockSocketAddress *addr, const char *str,
836 Error **errp)
837{
838 char cid[33];
839 char port[33];
840 int n;
841
842 if (sscanf(str, "%32[^:]:%32[^,]%n", cid, port, &n) != 2) {
843 error_setg(errp, "error parsing address '%s'", str);
844 return -1;
845 }
846 if (str[n] != '\0') {
847 error_setg(errp, "trailing characters in address '%s'", str);
848 return -1;
849 }
850
851 addr->cid = g_strdup(cid);
852 addr->port = g_strdup(port);
853 return 0;
854}
855#else
856static void vsock_unsupported(Error **errp)
857{
858 error_setg(errp, "socket family AF_VSOCK unsupported");
859}
860
861static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
862{
863 vsock_unsupported(errp);
864 return -1;
865}
866
867static int vsock_listen_saddr(VsockSocketAddress *vaddr,
868 int num,
869 Error **errp)
870{
871 vsock_unsupported(errp);
872 return -1;
873}
874
875static int vsock_parse(VsockSocketAddress *addr, const char *str,
876 Error **errp)
877{
878 vsock_unsupported(errp);
879 return -1;
880}
881#endif
882
883static bool saddr_is_abstract(UnixSocketAddress *saddr)
884{
885#ifdef CONFIG_LINUX
886 return saddr->abstract;
887#else
888 return false;
889#endif
890}
891
892static bool saddr_is_tight(UnixSocketAddress *saddr)
893{
894#ifdef CONFIG_LINUX
895 return !saddr->has_tight || saddr->tight;
896#else
897 return false;
898#endif
899}
900
901static int unix_listen_saddr(UnixSocketAddress *saddr,
902 int num,
903 Error **errp)
904{
905 bool abstract = saddr_is_abstract(saddr);
906 struct sockaddr_un un;
907 int sock, fd;
908 char *pathbuf = NULL;
909 const char *path;
910 size_t pathlen;
911 size_t addrlen;
912
913 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
914 if (sock < 0) {
915 error_setg_errno(errp, errno, "Failed to create Unix socket");
916 return -1;
917 }
918
919 if (saddr->path[0] || abstract) {
920 path = saddr->path;
921 } else {
922 path = pathbuf = g_strdup_printf("%s/qemu-socket-XXXXXX",
923 g_get_tmp_dir());
924 }
925
926 pathlen = strlen(path);
927 if (pathlen > sizeof(un.sun_path) ||
928 (abstract && pathlen > (sizeof(un.sun_path) - 1))) {
929 error_setg(errp, "UNIX socket path '%s' is too long", path);
930 error_append_hint(errp, "Path must be less than %zu bytes\n",
931 abstract ? sizeof(un.sun_path) - 1 :
932 sizeof(un.sun_path));
933 goto err;
934 }
935
936 if (pathbuf != NULL) {
937
938
939
940
941
942
943
944 fd = mkstemp(pathbuf);
945 if (fd < 0) {
946 error_setg_errno(errp, errno,
947 "Failed to make a temporary socket %s", pathbuf);
948 goto err;
949 }
950 close(fd);
951 }
952
953 if (!abstract && unlink(path) < 0 && errno != ENOENT) {
954 error_setg_errno(errp, errno,
955 "Failed to unlink socket %s", path);
956 goto err;
957 }
958
959 memset(&un, 0, sizeof(un));
960 un.sun_family = AF_UNIX;
961 addrlen = sizeof(un);
962
963 if (abstract) {
964 un.sun_path[0] = '\0';
965 memcpy(&un.sun_path[1], path, pathlen);
966 if (saddr_is_tight(saddr)) {
967 addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
968 }
969 } else {
970 memcpy(un.sun_path, path, pathlen);
971 }
972
973 if (bind(sock, (struct sockaddr *) &un, addrlen) < 0) {
974 error_setg_errno(errp, errno, "Failed to bind socket to %s", path);
975 goto err;
976 }
977 if (listen(sock, num) < 0) {
978 error_setg_errno(errp, errno, "Failed to listen on socket");
979 goto err;
980 }
981
982 g_free(pathbuf);
983 return sock;
984
985err:
986 g_free(pathbuf);
987 closesocket(sock);
988 return -1;
989}
990
991static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
992{
993 bool abstract = saddr_is_abstract(saddr);
994 struct sockaddr_un un;
995 int sock, rc;
996 size_t pathlen;
997 size_t addrlen;
998
999 if (saddr->path == NULL) {
1000 error_setg(errp, "unix connect: no path specified");
1001 return -1;
1002 }
1003
1004 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
1005 if (sock < 0) {
1006 error_setg_errno(errp, errno, "Failed to create socket");
1007 return -1;
1008 }
1009
1010 pathlen = strlen(saddr->path);
1011 if (pathlen > sizeof(un.sun_path) ||
1012 (abstract && pathlen > (sizeof(un.sun_path) - 1))) {
1013 error_setg(errp, "UNIX socket path '%s' is too long", saddr->path);
1014 error_append_hint(errp, "Path must be less than %zu bytes\n",
1015 abstract ? sizeof(un.sun_path) - 1 :
1016 sizeof(un.sun_path));
1017 goto err;
1018 }
1019
1020 memset(&un, 0, sizeof(un));
1021 un.sun_family = AF_UNIX;
1022 addrlen = sizeof(un);
1023
1024 if (abstract) {
1025 un.sun_path[0] = '\0';
1026 memcpy(&un.sun_path[1], saddr->path, pathlen);
1027 if (saddr_is_tight(saddr)) {
1028 addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
1029 }
1030 } else {
1031 memcpy(un.sun_path, saddr->path, pathlen);
1032 }
1033
1034 do {
1035 rc = 0;
1036 if (connect(sock, (struct sockaddr *) &un, addrlen) < 0) {
1037 rc = -errno;
1038 }
1039 } while (rc == -EINTR);
1040
1041 if (rc < 0) {
1042 error_setg_errno(errp, -rc, "Failed to connect to '%s'",
1043 saddr->path);
1044 goto err;
1045 }
1046
1047 return sock;
1048
1049 err:
1050 closesocket(sock);
1051 return -1;
1052}
1053
1054
1055int unix_listen(const char *str, Error **errp)
1056{
1057 UnixSocketAddress *saddr;
1058 int sock;
1059
1060 saddr = g_new0(UnixSocketAddress, 1);
1061 saddr->path = g_strdup(str);
1062 sock = unix_listen_saddr(saddr, 1, errp);
1063 qapi_free_UnixSocketAddress(saddr);
1064 return sock;
1065}
1066
1067int unix_connect(const char *path, Error **errp)
1068{
1069 UnixSocketAddress *saddr;
1070 int sock;
1071
1072 saddr = g_new0(UnixSocketAddress, 1);
1073 saddr->path = g_strdup(path);
1074 sock = unix_connect_saddr(saddr, errp);
1075 qapi_free_UnixSocketAddress(saddr);
1076 return sock;
1077}
1078
1079char *socket_uri(SocketAddress *addr)
1080{
1081 switch (addr->type) {
1082 case SOCKET_ADDRESS_TYPE_INET:
1083 return g_strdup_printf("tcp:%s:%s",
1084 addr->u.inet.host,
1085 addr->u.inet.port);
1086 case SOCKET_ADDRESS_TYPE_UNIX:
1087 return g_strdup_printf("unix:%s",
1088 addr->u.q_unix.path);
1089 case SOCKET_ADDRESS_TYPE_FD:
1090 return g_strdup_printf("fd:%s", addr->u.fd.str);
1091 case SOCKET_ADDRESS_TYPE_VSOCK:
1092 return g_strdup_printf("vsock:%s:%s",
1093 addr->u.vsock.cid,
1094 addr->u.vsock.port);
1095 default:
1096 return g_strdup("unknown address type");
1097 }
1098}
1099
1100SocketAddress *socket_parse(const char *str, Error **errp)
1101{
1102 SocketAddress *addr;
1103
1104 addr = g_new0(SocketAddress, 1);
1105 if (strstart(str, "unix:", NULL)) {
1106 if (str[5] == '\0') {
1107 error_setg(errp, "invalid Unix socket address");
1108 goto fail;
1109 } else {
1110 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1111 addr->u.q_unix.path = g_strdup(str + 5);
1112 }
1113 } else if (strstart(str, "fd:", NULL)) {
1114 if (str[3] == '\0') {
1115 error_setg(errp, "invalid file descriptor address");
1116 goto fail;
1117 } else {
1118 addr->type = SOCKET_ADDRESS_TYPE_FD;
1119 addr->u.fd.str = g_strdup(str + 3);
1120 }
1121 } else if (strstart(str, "vsock:", NULL)) {
1122 addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
1123 if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
1124 goto fail;
1125 }
1126 } else if (strstart(str, "tcp:", NULL)) {
1127 addr->type = SOCKET_ADDRESS_TYPE_INET;
1128 if (inet_parse(&addr->u.inet, str + strlen("tcp:"), errp)) {
1129 goto fail;
1130 }
1131 } else {
1132 addr->type = SOCKET_ADDRESS_TYPE_INET;
1133 if (inet_parse(&addr->u.inet, str, errp)) {
1134 goto fail;
1135 }
1136 }
1137 return addr;
1138
1139fail:
1140 qapi_free_SocketAddress(addr);
1141 return NULL;
1142}
1143
1144static int socket_get_fd(const char *fdstr, Error **errp)
1145{
1146 Monitor *cur_mon = monitor_cur();
1147 int fd;
1148 if (cur_mon) {
1149 fd = monitor_get_fd(cur_mon, fdstr, errp);
1150 if (fd < 0) {
1151 return -1;
1152 }
1153 } else {
1154 if (qemu_strtoi(fdstr, NULL, 10, &fd) < 0) {
1155 error_setg_errno(errp, errno,
1156 "Unable to parse FD number %s",
1157 fdstr);
1158 return -1;
1159 }
1160 }
1161 if (!fd_is_socket(fd)) {
1162 error_setg(errp, "File descriptor '%s' is not a socket", fdstr);
1163 close(fd);
1164 return -1;
1165 }
1166 return fd;
1167}
1168
1169int socket_address_parse_named_fd(SocketAddress *addr, Error **errp)
1170{
1171 int fd;
1172
1173 if (addr->type != SOCKET_ADDRESS_TYPE_FD) {
1174 return 0;
1175 }
1176
1177 fd = socket_get_fd(addr->u.fd.str, errp);
1178 if (fd < 0) {
1179 return fd;
1180 }
1181
1182 g_free(addr->u.fd.str);
1183 addr->u.fd.str = g_strdup_printf("%d", fd);
1184
1185 return 0;
1186}
1187
1188int socket_connect(SocketAddress *addr, Error **errp)
1189{
1190 int fd;
1191
1192 switch (addr->type) {
1193 case SOCKET_ADDRESS_TYPE_INET:
1194 fd = inet_connect_saddr(&addr->u.inet, errp);
1195 break;
1196
1197 case SOCKET_ADDRESS_TYPE_UNIX:
1198 fd = unix_connect_saddr(&addr->u.q_unix, errp);
1199 break;
1200
1201 case SOCKET_ADDRESS_TYPE_FD:
1202 fd = socket_get_fd(addr->u.fd.str, errp);
1203 break;
1204
1205 case SOCKET_ADDRESS_TYPE_VSOCK:
1206 fd = vsock_connect_saddr(&addr->u.vsock, errp);
1207 break;
1208
1209 default:
1210 abort();
1211 }
1212 return fd;
1213}
1214
1215int socket_listen(SocketAddress *addr, int num, Error **errp)
1216{
1217 int fd;
1218
1219 trace_socket_listen(num);
1220 switch (addr->type) {
1221 case SOCKET_ADDRESS_TYPE_INET:
1222 fd = inet_listen_saddr(&addr->u.inet, 0, num, errp);
1223 break;
1224
1225 case SOCKET_ADDRESS_TYPE_UNIX:
1226 fd = unix_listen_saddr(&addr->u.q_unix, num, errp);
1227 break;
1228
1229 case SOCKET_ADDRESS_TYPE_FD:
1230 fd = socket_get_fd(addr->u.fd.str, errp);
1231 if (fd < 0) {
1232 return -1;
1233 }
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245 if (listen(fd, num) != 0) {
1246 error_setg_errno(errp, errno, "Failed to listen on fd socket");
1247 closesocket(fd);
1248 return -1;
1249 }
1250 break;
1251
1252 case SOCKET_ADDRESS_TYPE_VSOCK:
1253 fd = vsock_listen_saddr(&addr->u.vsock, num, errp);
1254 break;
1255
1256 default:
1257 abort();
1258 }
1259 return fd;
1260}
1261
1262void socket_listen_cleanup(int fd, Error **errp)
1263{
1264 SocketAddress *addr;
1265
1266 addr = socket_local_address(fd, errp);
1267 if (!addr) {
1268 return;
1269 }
1270
1271 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX
1272 && addr->u.q_unix.path) {
1273 if (unlink(addr->u.q_unix.path) < 0 && errno != ENOENT) {
1274 error_setg_errno(errp, errno,
1275 "Failed to unlink socket %s",
1276 addr->u.q_unix.path);
1277 }
1278 }
1279
1280 qapi_free_SocketAddress(addr);
1281}
1282
1283int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
1284{
1285 int fd;
1286
1287
1288
1289
1290
1291 switch (remote->type) {
1292 case SOCKET_ADDRESS_TYPE_INET:
1293 fd = inet_dgram_saddr(&remote->u.inet,
1294 local ? &local->u.inet : NULL, errp);
1295 break;
1296
1297 default:
1298 error_setg(errp, "socket type unsupported for datagram");
1299 fd = -1;
1300 }
1301 return fd;
1302}
1303
1304
1305static SocketAddress *
1306socket_sockaddr_to_address_inet(struct sockaddr_storage *sa,
1307 socklen_t salen,
1308 Error **errp)
1309{
1310 char host[NI_MAXHOST];
1311 char serv[NI_MAXSERV];
1312 SocketAddress *addr;
1313 InetSocketAddress *inet;
1314 int ret;
1315
1316 ret = getnameinfo((struct sockaddr *)sa, salen,
1317 host, sizeof(host),
1318 serv, sizeof(serv),
1319 NI_NUMERICHOST | NI_NUMERICSERV);
1320 if (ret != 0) {
1321 error_setg(errp, "Cannot format numeric socket address: %s",
1322 gai_strerror(ret));
1323 return NULL;
1324 }
1325
1326 addr = g_new0(SocketAddress, 1);
1327 addr->type = SOCKET_ADDRESS_TYPE_INET;
1328 inet = &addr->u.inet;
1329 inet->host = g_strdup(host);
1330 inet->port = g_strdup(serv);
1331 if (sa->ss_family == AF_INET) {
1332 inet->has_ipv4 = inet->ipv4 = true;
1333 } else {
1334 inet->has_ipv6 = inet->ipv6 = true;
1335 }
1336
1337 return addr;
1338}
1339
1340
1341static SocketAddress *
1342socket_sockaddr_to_address_unix(struct sockaddr_storage *sa,
1343 socklen_t salen,
1344 Error **errp)
1345{
1346 SocketAddress *addr;
1347 struct sockaddr_un *su = (struct sockaddr_un *)sa;
1348
1349 addr = g_new0(SocketAddress, 1);
1350 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1351 salen -= offsetof(struct sockaddr_un, sun_path);
1352#ifdef CONFIG_LINUX
1353 if (salen > 0 && !su->sun_path[0]) {
1354
1355 addr->u.q_unix.path = g_strndup(su->sun_path + 1, salen - 1);
1356 addr->u.q_unix.has_abstract = true;
1357 addr->u.q_unix.abstract = true;
1358 addr->u.q_unix.has_tight = true;
1359 addr->u.q_unix.tight = salen < sizeof(su->sun_path);
1360 return addr;
1361 }
1362#endif
1363
1364 addr->u.q_unix.path = g_strndup(su->sun_path, salen);
1365 return addr;
1366}
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 case AF_UNIX:
1399 return socket_sockaddr_to_address_unix(sa, salen, errp);
1400
1401#ifdef CONFIG_AF_VSOCK
1402 case AF_VSOCK:
1403 return socket_sockaddr_to_address_vsock(sa, salen, errp);
1404#endif
1405
1406 default:
1407 error_setg(errp, "socket family %d unsupported",
1408 sa->ss_family);
1409 return NULL;
1410 }
1411 return 0;
1412}
1413
1414
1415SocketAddress *socket_local_address(int fd, Error **errp)
1416{
1417 struct sockaddr_storage ss;
1418 socklen_t sslen = sizeof(ss);
1419
1420 if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) {
1421 error_setg_errno(errp, errno, "%s",
1422 "Unable to query local socket address");
1423 return NULL;
1424 }
1425
1426 return socket_sockaddr_to_address(&ss, sslen, errp);
1427}
1428
1429
1430SocketAddress *socket_remote_address(int fd, Error **errp)
1431{
1432 struct sockaddr_storage ss;
1433 socklen_t sslen = sizeof(ss);
1434
1435 if (getpeername(fd, (struct sockaddr *)&ss, &sslen) < 0) {
1436 error_setg_errno(errp, errno, "%s",
1437 "Unable to query remote socket address");
1438 return NULL;
1439 }
1440
1441 return socket_sockaddr_to_address(&ss, sslen, errp);
1442}
1443
1444
1445SocketAddress *socket_address_flatten(SocketAddressLegacy *addr_legacy)
1446{
1447 SocketAddress *addr;
1448
1449 if (!addr_legacy) {
1450 return NULL;
1451 }
1452
1453 addr = g_new(SocketAddress, 1);
1454
1455 switch (addr_legacy->type) {
1456 case SOCKET_ADDRESS_TYPE_INET:
1457 addr->type = SOCKET_ADDRESS_TYPE_INET;
1458 QAPI_CLONE_MEMBERS(InetSocketAddress, &addr->u.inet,
1459 addr_legacy->u.inet.data);
1460 break;
1461 case SOCKET_ADDRESS_TYPE_UNIX:
1462 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1463 QAPI_CLONE_MEMBERS(UnixSocketAddress, &addr->u.q_unix,
1464 addr_legacy->u.q_unix.data);
1465 break;
1466 case SOCKET_ADDRESS_TYPE_VSOCK:
1467 addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
1468 QAPI_CLONE_MEMBERS(VsockSocketAddress, &addr->u.vsock,
1469 addr_legacy->u.vsock.data);
1470 break;
1471 case SOCKET_ADDRESS_TYPE_FD:
1472 addr->type = SOCKET_ADDRESS_TYPE_FD;
1473 QAPI_CLONE_MEMBERS(String, &addr->u.fd, addr_legacy->u.fd.data);
1474 break;
1475 default:
1476 abort();
1477 }
1478
1479 return addr;
1480}
1481