s3:smbd/durable: trigger pending write_time updates before disconnecting the file
[Samba/gebeck_regimport.git] / lib / tsocket / tsocket_bsd.c
blobd5721b4d94ef5d41c81215ec3efb0f120f92d97f
1 /*
2 Unix SMB/CIFS implementation.
4 Copyright (C) Stefan Metzmacher 2009
6 ** NOTE! The following LGPL license applies to the tsocket
7 ** library. This does NOT imply that all of Samba is released
8 ** under the LGPL
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 3 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 #include "replace.h"
25 #include "system/filesys.h"
26 #include "system/network.h"
27 #include "tsocket.h"
28 #include "tsocket_internal.h"
30 static int tsocket_bsd_error_from_errno(int ret,
31 int sys_errno,
32 bool *retry)
34 *retry = false;
36 if (ret >= 0) {
37 return 0;
40 if (ret != -1) {
41 return EIO;
44 if (sys_errno == 0) {
45 return EIO;
48 if (sys_errno == EINTR) {
49 *retry = true;
50 return sys_errno;
53 if (sys_errno == EINPROGRESS) {
54 *retry = true;
55 return sys_errno;
58 if (sys_errno == EAGAIN) {
59 *retry = true;
60 return sys_errno;
63 #ifdef EWOULDBLOCK
64 if (sys_errno == EWOULDBLOCK) {
65 *retry = true;
66 return sys_errno;
68 #endif
70 return sys_errno;
73 static int tsocket_bsd_common_prepare_fd(int fd, bool high_fd)
75 int i;
76 int sys_errno = 0;
77 int fds[3];
78 int num_fds = 0;
80 int result, flags;
82 if (fd == -1) {
83 return -1;
86 /* first make a fd >= 3 */
87 if (high_fd) {
88 while (fd < 3) {
89 fds[num_fds++] = fd;
90 fd = dup(fd);
91 if (fd == -1) {
92 sys_errno = errno;
93 break;
96 for (i=0; i<num_fds; i++) {
97 close(fds[i]);
99 if (fd == -1) {
100 errno = sys_errno;
101 return fd;
105 /* fd should be nonblocking. */
107 #ifdef O_NONBLOCK
108 #define FLAG_TO_SET O_NONBLOCK
109 #else
110 #ifdef SYSV
111 #define FLAG_TO_SET O_NDELAY
112 #else /* BSD */
113 #define FLAG_TO_SET FNDELAY
114 #endif
115 #endif
117 if ((flags = fcntl(fd, F_GETFL)) == -1) {
118 goto fail;
121 flags |= FLAG_TO_SET;
122 if (fcntl(fd, F_SETFL, flags) == -1) {
123 goto fail;
126 #undef FLAG_TO_SET
128 /* fd should be closed on exec() */
129 #ifdef FD_CLOEXEC
130 result = flags = fcntl(fd, F_GETFD, 0);
131 if (flags >= 0) {
132 flags |= FD_CLOEXEC;
133 result = fcntl(fd, F_SETFD, flags);
135 if (result < 0) {
136 goto fail;
138 #endif
139 return fd;
141 fail:
142 if (fd != -1) {
143 sys_errno = errno;
144 close(fd);
145 errno = sys_errno;
147 return -1;
150 static ssize_t tsocket_bsd_pending(int fd)
152 int ret, error;
153 int value = 0;
154 socklen_t len;
156 ret = ioctl(fd, FIONREAD, &value);
157 if (ret == -1) {
158 return ret;
161 if (ret != 0) {
162 /* this should not be reached */
163 errno = EIO;
164 return -1;
167 if (value != 0) {
168 return value;
171 error = 0;
172 len = sizeof(error);
175 * if no data is available check if the socket is in error state. For
176 * dgram sockets it's the way to return ICMP error messages of
177 * connected sockets to the caller.
179 ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len);
180 if (ret == -1) {
181 return ret;
183 if (error != 0) {
184 errno = error;
185 return -1;
187 return 0;
190 static const struct tsocket_address_ops tsocket_address_bsd_ops;
192 struct tsocket_address_bsd {
193 socklen_t sa_socklen;
194 union {
195 struct sockaddr sa;
196 struct sockaddr_in in;
197 #ifdef HAVE_IPV6
198 struct sockaddr_in6 in6;
199 #endif
200 struct sockaddr_un un;
201 struct sockaddr_storage ss;
202 } u;
205 int _tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx,
206 struct sockaddr *sa,
207 size_t sa_socklen,
208 struct tsocket_address **_addr,
209 const char *location)
211 struct tsocket_address *addr;
212 struct tsocket_address_bsd *bsda;
214 if (sa_socklen < sizeof(sa->sa_family)) {
215 errno = EINVAL;
216 return -1;
219 switch (sa->sa_family) {
220 case AF_UNIX:
221 if (sa_socklen > sizeof(struct sockaddr_un)) {
222 sa_socklen = sizeof(struct sockaddr_un);
224 break;
225 case AF_INET:
226 if (sa_socklen < sizeof(struct sockaddr_in)) {
227 errno = EINVAL;
228 return -1;
230 sa_socklen = sizeof(struct sockaddr_in);
231 break;
232 #ifdef HAVE_IPV6
233 case AF_INET6:
234 if (sa_socklen < sizeof(struct sockaddr_in6)) {
235 errno = EINVAL;
236 return -1;
238 sa_socklen = sizeof(struct sockaddr_in6);
239 break;
240 #endif
241 default:
242 errno = EAFNOSUPPORT;
243 return -1;
246 if (sa_socklen > sizeof(struct sockaddr_storage)) {
247 errno = EINVAL;
248 return -1;
251 addr = tsocket_address_create(mem_ctx,
252 &tsocket_address_bsd_ops,
253 &bsda,
254 struct tsocket_address_bsd,
255 location);
256 if (!addr) {
257 errno = ENOMEM;
258 return -1;
261 ZERO_STRUCTP(bsda);
263 memcpy(&bsda->u.ss, sa, sa_socklen);
265 bsda->sa_socklen = sa_socklen;
266 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
267 bsda->u.sa.sa_len = bsda->sa_socklen;
268 #endif
270 *_addr = addr;
271 return 0;
274 ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr,
275 struct sockaddr *sa,
276 size_t sa_socklen)
278 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
279 struct tsocket_address_bsd);
281 if (!bsda) {
282 errno = EINVAL;
283 return -1;
286 if (sa_socklen < bsda->sa_socklen) {
287 errno = EINVAL;
288 return -1;
291 if (sa_socklen > bsda->sa_socklen) {
292 memset(sa, 0, sa_socklen);
293 sa_socklen = bsda->sa_socklen;
296 memcpy(sa, &bsda->u.ss, sa_socklen);
297 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
298 sa->sa_len = sa_socklen;
299 #endif
300 return sa_socklen;
303 bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam)
305 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
306 struct tsocket_address_bsd);
308 if (!bsda) {
309 return false;
312 switch (bsda->u.sa.sa_family) {
313 case AF_INET:
314 if (strcasecmp(fam, "ip") == 0) {
315 return true;
318 if (strcasecmp(fam, "ipv4") == 0) {
319 return true;
322 return false;
323 #ifdef HAVE_IPV6
324 case AF_INET6:
325 if (strcasecmp(fam, "ip") == 0) {
326 return true;
329 if (strcasecmp(fam, "ipv6") == 0) {
330 return true;
333 return false;
334 #endif
337 return false;
340 int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx,
341 const char *fam,
342 const char *addr,
343 uint16_t port,
344 struct tsocket_address **_addr,
345 const char *location)
347 struct addrinfo hints;
348 struct addrinfo *result = NULL;
349 char port_str[6];
350 int ret;
352 ZERO_STRUCT(hints);
354 * we use SOCKET_STREAM here to get just one result
355 * back from getaddrinfo().
357 hints.ai_socktype = SOCK_STREAM;
358 hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
360 if (strcasecmp(fam, "ip") == 0) {
361 hints.ai_family = AF_UNSPEC;
362 if (!addr) {
363 #ifdef HAVE_IPV6
364 addr = "::";
365 #else
366 addr = "0.0.0.0";
367 #endif
369 } else if (strcasecmp(fam, "ipv4") == 0) {
370 hints.ai_family = AF_INET;
371 if (!addr) {
372 addr = "0.0.0.0";
374 #ifdef HAVE_IPV6
375 } else if (strcasecmp(fam, "ipv6") == 0) {
376 hints.ai_family = AF_INET6;
377 if (!addr) {
378 addr = "::";
380 #endif
381 } else {
382 errno = EAFNOSUPPORT;
383 return -1;
386 snprintf(port_str, sizeof(port_str) - 1, "%u", port);
388 ret = getaddrinfo(addr, port_str, &hints, &result);
389 if (ret != 0) {
390 switch (ret) {
391 case EAI_FAIL:
392 errno = EINVAL;
393 break;
395 ret = -1;
396 goto done;
399 if (result->ai_socktype != SOCK_STREAM) {
400 errno = EINVAL;
401 ret = -1;
402 goto done;
405 ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
406 result->ai_addr,
407 result->ai_addrlen,
408 _addr,
409 location);
411 done:
412 if (result) {
413 freeaddrinfo(result);
415 return ret;
418 char *tsocket_address_inet_addr_string(const struct tsocket_address *addr,
419 TALLOC_CTX *mem_ctx)
421 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
422 struct tsocket_address_bsd);
423 char addr_str[INET6_ADDRSTRLEN+1];
424 const char *str;
426 if (!bsda) {
427 errno = EINVAL;
428 return NULL;
431 switch (bsda->u.sa.sa_family) {
432 case AF_INET:
433 str = inet_ntop(bsda->u.in.sin_family,
434 &bsda->u.in.sin_addr,
435 addr_str, sizeof(addr_str));
436 break;
437 #ifdef HAVE_IPV6
438 case AF_INET6:
439 str = inet_ntop(bsda->u.in6.sin6_family,
440 &bsda->u.in6.sin6_addr,
441 addr_str, sizeof(addr_str));
442 break;
443 #endif
444 default:
445 errno = EINVAL;
446 return NULL;
449 if (!str) {
450 return NULL;
453 return talloc_strdup(mem_ctx, str);
456 uint16_t tsocket_address_inet_port(const struct tsocket_address *addr)
458 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
459 struct tsocket_address_bsd);
460 uint16_t port = 0;
462 if (!bsda) {
463 errno = EINVAL;
464 return 0;
467 switch (bsda->u.sa.sa_family) {
468 case AF_INET:
469 port = ntohs(bsda->u.in.sin_port);
470 break;
471 #ifdef HAVE_IPV6
472 case AF_INET6:
473 port = ntohs(bsda->u.in6.sin6_port);
474 break;
475 #endif
476 default:
477 errno = EINVAL;
478 return 0;
481 return port;
484 int tsocket_address_inet_set_port(struct tsocket_address *addr,
485 uint16_t port)
487 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
488 struct tsocket_address_bsd);
490 if (!bsda) {
491 errno = EINVAL;
492 return -1;
495 switch (bsda->u.sa.sa_family) {
496 case AF_INET:
497 bsda->u.in.sin_port = htons(port);
498 break;
499 #ifdef HAVE_IPV6
500 case AF_INET6:
501 bsda->u.in6.sin6_port = htons(port);
502 break;
503 #endif
504 default:
505 errno = EINVAL;
506 return -1;
509 return 0;
512 bool tsocket_address_is_unix(const struct tsocket_address *addr)
514 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
515 struct tsocket_address_bsd);
517 if (!bsda) {
518 return false;
521 switch (bsda->u.sa.sa_family) {
522 case AF_UNIX:
523 return true;
526 return false;
529 int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx,
530 const char *path,
531 struct tsocket_address **_addr,
532 const char *location)
534 struct sockaddr_un un;
535 void *p = &un;
536 int ret;
538 if (!path) {
539 path = "";
542 if (strlen(path) > sizeof(un.sun_path)-1) {
543 errno = ENAMETOOLONG;
544 return -1;
547 ZERO_STRUCT(un);
548 un.sun_family = AF_UNIX;
549 strncpy(un.sun_path, path, sizeof(un.sun_path)-1);
551 ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
552 (struct sockaddr *)p,
553 sizeof(un),
554 _addr,
555 location);
557 return ret;
560 char *tsocket_address_unix_path(const struct tsocket_address *addr,
561 TALLOC_CTX *mem_ctx)
563 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
564 struct tsocket_address_bsd);
565 const char *str;
567 if (!bsda) {
568 errno = EINVAL;
569 return NULL;
572 switch (bsda->u.sa.sa_family) {
573 case AF_UNIX:
574 str = bsda->u.un.sun_path;
575 break;
576 default:
577 errno = EINVAL;
578 return NULL;
581 return talloc_strdup(mem_ctx, str);
584 static char *tsocket_address_bsd_string(const struct tsocket_address *addr,
585 TALLOC_CTX *mem_ctx)
587 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
588 struct tsocket_address_bsd);
589 char *str;
590 char *addr_str;
591 const char *prefix = NULL;
592 uint16_t port;
594 switch (bsda->u.sa.sa_family) {
595 case AF_UNIX:
596 return talloc_asprintf(mem_ctx, "unix:%s",
597 bsda->u.un.sun_path);
598 case AF_INET:
599 prefix = "ipv4";
600 break;
601 #ifdef HAVE_IPV6
602 case AF_INET6:
603 prefix = "ipv6";
604 break;
605 #endif
606 default:
607 errno = EINVAL;
608 return NULL;
611 addr_str = tsocket_address_inet_addr_string(addr, mem_ctx);
612 if (!addr_str) {
613 return NULL;
616 port = tsocket_address_inet_port(addr);
618 str = talloc_asprintf(mem_ctx, "%s:%s:%u",
619 prefix, addr_str, port);
620 talloc_free(addr_str);
622 return str;
625 static struct tsocket_address *tsocket_address_bsd_copy(const struct tsocket_address *addr,
626 TALLOC_CTX *mem_ctx,
627 const char *location)
629 struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
630 struct tsocket_address_bsd);
631 struct tsocket_address *copy;
632 int ret;
634 ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
635 &bsda->u.sa,
636 bsda->sa_socklen,
637 &copy,
638 location);
639 if (ret != 0) {
640 return NULL;
643 return copy;
646 static const struct tsocket_address_ops tsocket_address_bsd_ops = {
647 .name = "bsd",
648 .string = tsocket_address_bsd_string,
649 .copy = tsocket_address_bsd_copy,
652 struct tdgram_bsd {
653 int fd;
655 void *event_ptr;
656 struct tevent_fd *fde;
658 void *readable_private;
659 void (*readable_handler)(void *private_data);
660 void *writeable_private;
661 void (*writeable_handler)(void *private_data);
664 static void tdgram_bsd_fde_handler(struct tevent_context *ev,
665 struct tevent_fd *fde,
666 uint16_t flags,
667 void *private_data)
669 struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
670 struct tdgram_bsd);
672 if (flags & TEVENT_FD_WRITE) {
673 bsds->writeable_handler(bsds->writeable_private);
674 return;
676 if (flags & TEVENT_FD_READ) {
677 if (!bsds->readable_handler) {
678 TEVENT_FD_NOT_READABLE(bsds->fde);
679 return;
681 bsds->readable_handler(bsds->readable_private);
682 return;
686 static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
687 struct tevent_context *ev,
688 void (*handler)(void *private_data),
689 void *private_data)
691 if (ev == NULL) {
692 if (handler) {
693 errno = EINVAL;
694 return -1;
696 if (!bsds->readable_handler) {
697 return 0;
699 bsds->readable_handler = NULL;
700 bsds->readable_private = NULL;
702 return 0;
705 /* read and write must use the same tevent_context */
706 if (bsds->event_ptr != ev) {
707 if (bsds->readable_handler || bsds->writeable_handler) {
708 errno = EINVAL;
709 return -1;
711 bsds->event_ptr = NULL;
712 TALLOC_FREE(bsds->fde);
715 if (tevent_fd_get_flags(bsds->fde) == 0) {
716 TALLOC_FREE(bsds->fde);
718 bsds->fde = tevent_add_fd(ev, bsds,
719 bsds->fd, TEVENT_FD_READ,
720 tdgram_bsd_fde_handler,
721 bsds);
722 if (!bsds->fde) {
723 errno = ENOMEM;
724 return -1;
727 /* cache the event context we're running on */
728 bsds->event_ptr = ev;
729 } else if (!bsds->readable_handler) {
730 TEVENT_FD_READABLE(bsds->fde);
733 bsds->readable_handler = handler;
734 bsds->readable_private = private_data;
736 return 0;
739 static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
740 struct tevent_context *ev,
741 void (*handler)(void *private_data),
742 void *private_data)
744 if (ev == NULL) {
745 if (handler) {
746 errno = EINVAL;
747 return -1;
749 if (!bsds->writeable_handler) {
750 return 0;
752 bsds->writeable_handler = NULL;
753 bsds->writeable_private = NULL;
754 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
756 return 0;
759 /* read and write must use the same tevent_context */
760 if (bsds->event_ptr != ev) {
761 if (bsds->readable_handler || bsds->writeable_handler) {
762 errno = EINVAL;
763 return -1;
765 bsds->event_ptr = NULL;
766 TALLOC_FREE(bsds->fde);
769 if (tevent_fd_get_flags(bsds->fde) == 0) {
770 TALLOC_FREE(bsds->fde);
772 bsds->fde = tevent_add_fd(ev, bsds,
773 bsds->fd, TEVENT_FD_WRITE,
774 tdgram_bsd_fde_handler,
775 bsds);
776 if (!bsds->fde) {
777 errno = ENOMEM;
778 return -1;
781 /* cache the event context we're running on */
782 bsds->event_ptr = ev;
783 } else if (!bsds->writeable_handler) {
784 TEVENT_FD_WRITEABLE(bsds->fde);
787 bsds->writeable_handler = handler;
788 bsds->writeable_private = private_data;
790 return 0;
793 struct tdgram_bsd_recvfrom_state {
794 struct tdgram_context *dgram;
796 uint8_t *buf;
797 size_t len;
798 struct tsocket_address *src;
801 static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
803 struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
804 struct tdgram_bsd);
806 tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
808 return 0;
811 static void tdgram_bsd_recvfrom_handler(void *private_data);
813 static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
814 struct tevent_context *ev,
815 struct tdgram_context *dgram)
817 struct tevent_req *req;
818 struct tdgram_bsd_recvfrom_state *state;
819 struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
820 int ret;
822 req = tevent_req_create(mem_ctx, &state,
823 struct tdgram_bsd_recvfrom_state);
824 if (!req) {
825 return NULL;
828 state->dgram = dgram;
829 state->buf = NULL;
830 state->len = 0;
831 state->src = NULL;
833 talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
835 if (bsds->fd == -1) {
836 tevent_req_error(req, ENOTCONN);
837 goto post;
841 * this is a fast path, not waiting for the
842 * socket to become explicit readable gains
843 * about 10%-20% performance in benchmark tests.
845 tdgram_bsd_recvfrom_handler(req);
846 if (!tevent_req_is_in_progress(req)) {
847 goto post;
850 ret = tdgram_bsd_set_readable_handler(bsds, ev,
851 tdgram_bsd_recvfrom_handler,
852 req);
853 if (ret == -1) {
854 tevent_req_error(req, errno);
855 goto post;
858 return req;
860 post:
861 tevent_req_post(req, ev);
862 return req;
865 static void tdgram_bsd_recvfrom_handler(void *private_data)
867 struct tevent_req *req = talloc_get_type_abort(private_data,
868 struct tevent_req);
869 struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
870 struct tdgram_bsd_recvfrom_state);
871 struct tdgram_context *dgram = state->dgram;
872 struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
873 struct tsocket_address_bsd *bsda;
874 ssize_t ret;
875 int err;
876 bool retry;
878 ret = tsocket_bsd_pending(bsds->fd);
879 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
880 if (retry) {
881 /* retry later */
882 return;
884 if (tevent_req_error(req, err)) {
885 return;
888 /* note that 'ret' can be 0 here */
889 state->buf = talloc_array(state, uint8_t, ret);
890 if (tevent_req_nomem(state->buf, req)) {
891 return;
893 state->len = ret;
895 state->src = tsocket_address_create(state,
896 &tsocket_address_bsd_ops,
897 &bsda,
898 struct tsocket_address_bsd,
899 __location__ "bsd_recvfrom");
900 if (tevent_req_nomem(state->src, req)) {
901 return;
904 ZERO_STRUCTP(bsda);
905 bsda->sa_socklen = sizeof(bsda->u.ss);
906 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
907 bsda->u.sa.sa_len = bsda->sa_socklen;
908 #endif
910 ret = recvfrom(bsds->fd, state->buf, state->len, 0,
911 &bsda->u.sa, &bsda->sa_socklen);
912 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
913 if (retry) {
914 /* retry later */
915 return;
917 if (tevent_req_error(req, err)) {
918 return;
922 * Some systems (FreeBSD, see bug #7115) return too much
923 * bytes in tsocket_bsd_pending()/ioctl(fd, FIONREAD, ...),
924 * the return value includes some IP/UDP header bytes,
925 * while recvfrom() just returns the payload.
927 state->buf = talloc_realloc(state, state->buf, uint8_t, ret);
928 if (tevent_req_nomem(state->buf, req)) {
929 return;
931 state->len = ret;
933 tevent_req_done(req);
936 static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
937 int *perrno,
938 TALLOC_CTX *mem_ctx,
939 uint8_t **buf,
940 struct tsocket_address **src)
942 struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
943 struct tdgram_bsd_recvfrom_state);
944 ssize_t ret;
946 ret = tsocket_simple_int_recv(req, perrno);
947 if (ret == 0) {
948 *buf = talloc_move(mem_ctx, &state->buf);
949 ret = state->len;
950 if (src) {
951 *src = talloc_move(mem_ctx, &state->src);
955 tevent_req_received(req);
956 return ret;
959 struct tdgram_bsd_sendto_state {
960 struct tdgram_context *dgram;
962 const uint8_t *buf;
963 size_t len;
964 const struct tsocket_address *dst;
966 ssize_t ret;
969 static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
971 struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
972 struct tdgram_bsd);
974 tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
976 return 0;
979 static void tdgram_bsd_sendto_handler(void *private_data);
981 static struct tevent_req *tdgram_bsd_sendto_send(TALLOC_CTX *mem_ctx,
982 struct tevent_context *ev,
983 struct tdgram_context *dgram,
984 const uint8_t *buf,
985 size_t len,
986 const struct tsocket_address *dst)
988 struct tevent_req *req;
989 struct tdgram_bsd_sendto_state *state;
990 struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
991 int ret;
993 req = tevent_req_create(mem_ctx, &state,
994 struct tdgram_bsd_sendto_state);
995 if (!req) {
996 return NULL;
999 state->dgram = dgram;
1000 state->buf = buf;
1001 state->len = len;
1002 state->dst = dst;
1003 state->ret = -1;
1005 talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
1007 if (bsds->fd == -1) {
1008 tevent_req_error(req, ENOTCONN);
1009 goto post;
1013 * this is a fast path, not waiting for the
1014 * socket to become explicit writeable gains
1015 * about 10%-20% performance in benchmark tests.
1017 tdgram_bsd_sendto_handler(req);
1018 if (!tevent_req_is_in_progress(req)) {
1019 goto post;
1022 ret = tdgram_bsd_set_writeable_handler(bsds, ev,
1023 tdgram_bsd_sendto_handler,
1024 req);
1025 if (ret == -1) {
1026 tevent_req_error(req, errno);
1027 goto post;
1030 return req;
1032 post:
1033 tevent_req_post(req, ev);
1034 return req;
1037 static void tdgram_bsd_sendto_handler(void *private_data)
1039 struct tevent_req *req = talloc_get_type_abort(private_data,
1040 struct tevent_req);
1041 struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1042 struct tdgram_bsd_sendto_state);
1043 struct tdgram_context *dgram = state->dgram;
1044 struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1045 struct sockaddr *sa = NULL;
1046 socklen_t sa_socklen = 0;
1047 ssize_t ret;
1048 int err;
1049 bool retry;
1051 if (state->dst) {
1052 struct tsocket_address_bsd *bsda =
1053 talloc_get_type(state->dst->private_data,
1054 struct tsocket_address_bsd);
1056 sa = &bsda->u.sa;
1057 sa_socklen = bsda->sa_socklen;
1060 ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_socklen);
1061 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1062 if (retry) {
1063 /* retry later */
1064 return;
1066 if (tevent_req_error(req, err)) {
1067 return;
1070 state->ret = ret;
1072 tevent_req_done(req);
1075 static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
1077 struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1078 struct tdgram_bsd_sendto_state);
1079 ssize_t ret;
1081 ret = tsocket_simple_int_recv(req, perrno);
1082 if (ret == 0) {
1083 ret = state->ret;
1086 tevent_req_received(req);
1087 return ret;
1090 struct tdgram_bsd_disconnect_state {
1091 uint8_t __dummy;
1094 static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1095 struct tevent_context *ev,
1096 struct tdgram_context *dgram)
1098 struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1099 struct tevent_req *req;
1100 struct tdgram_bsd_disconnect_state *state;
1101 int ret;
1102 int err;
1103 bool dummy;
1105 req = tevent_req_create(mem_ctx, &state,
1106 struct tdgram_bsd_disconnect_state);
1107 if (req == NULL) {
1108 return NULL;
1111 if (bsds->fd == -1) {
1112 tevent_req_error(req, ENOTCONN);
1113 goto post;
1116 TALLOC_FREE(bsds->fde);
1117 ret = close(bsds->fd);
1118 bsds->fd = -1;
1119 err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1120 if (tevent_req_error(req, err)) {
1121 goto post;
1124 tevent_req_done(req);
1125 post:
1126 tevent_req_post(req, ev);
1127 return req;
1130 static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
1131 int *perrno)
1133 int ret;
1135 ret = tsocket_simple_int_recv(req, perrno);
1137 tevent_req_received(req);
1138 return ret;
1141 static const struct tdgram_context_ops tdgram_bsd_ops = {
1142 .name = "bsd",
1144 .recvfrom_send = tdgram_bsd_recvfrom_send,
1145 .recvfrom_recv = tdgram_bsd_recvfrom_recv,
1147 .sendto_send = tdgram_bsd_sendto_send,
1148 .sendto_recv = tdgram_bsd_sendto_recv,
1150 .disconnect_send = tdgram_bsd_disconnect_send,
1151 .disconnect_recv = tdgram_bsd_disconnect_recv,
1154 static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
1156 TALLOC_FREE(bsds->fde);
1157 if (bsds->fd != -1) {
1158 close(bsds->fd);
1159 bsds->fd = -1;
1161 return 0;
1164 static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
1165 const struct tsocket_address *remote,
1166 bool broadcast,
1167 TALLOC_CTX *mem_ctx,
1168 struct tdgram_context **_dgram,
1169 const char *location)
1171 struct tsocket_address_bsd *lbsda =
1172 talloc_get_type_abort(local->private_data,
1173 struct tsocket_address_bsd);
1174 struct tsocket_address_bsd *rbsda = NULL;
1175 struct tdgram_context *dgram;
1176 struct tdgram_bsd *bsds;
1177 int fd;
1178 int ret;
1179 bool do_bind = false;
1180 bool do_reuseaddr = false;
1181 bool do_ipv6only = false;
1182 bool is_inet = false;
1183 int sa_fam = lbsda->u.sa.sa_family;
1185 if (remote) {
1186 rbsda = talloc_get_type_abort(remote->private_data,
1187 struct tsocket_address_bsd);
1190 switch (lbsda->u.sa.sa_family) {
1191 case AF_UNIX:
1192 if (broadcast) {
1193 errno = EINVAL;
1194 return -1;
1196 if (lbsda->u.un.sun_path[0] != 0) {
1197 do_reuseaddr = true;
1198 do_bind = true;
1200 break;
1201 case AF_INET:
1202 if (lbsda->u.in.sin_port != 0) {
1203 do_reuseaddr = true;
1204 do_bind = true;
1206 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
1207 do_bind = true;
1209 is_inet = true;
1210 break;
1211 #ifdef HAVE_IPV6
1212 case AF_INET6:
1213 if (lbsda->u.in6.sin6_port != 0) {
1214 do_reuseaddr = true;
1215 do_bind = true;
1217 if (memcmp(&in6addr_any,
1218 &lbsda->u.in6.sin6_addr,
1219 sizeof(in6addr_any)) != 0) {
1220 do_bind = true;
1222 is_inet = true;
1223 do_ipv6only = true;
1224 break;
1225 #endif
1226 default:
1227 errno = EINVAL;
1228 return -1;
1231 if (!do_bind && is_inet && rbsda) {
1232 sa_fam = rbsda->u.sa.sa_family;
1233 switch (sa_fam) {
1234 case AF_INET:
1235 do_ipv6only = false;
1236 break;
1237 #ifdef HAVE_IPV6
1238 case AF_INET6:
1239 do_ipv6only = true;
1240 break;
1241 #endif
1245 fd = socket(sa_fam, SOCK_DGRAM, 0);
1246 if (fd < 0) {
1247 return -1;
1250 fd = tsocket_bsd_common_prepare_fd(fd, true);
1251 if (fd < 0) {
1252 return -1;
1255 dgram = tdgram_context_create(mem_ctx,
1256 &tdgram_bsd_ops,
1257 &bsds,
1258 struct tdgram_bsd,
1259 location);
1260 if (!dgram) {
1261 int saved_errno = errno;
1262 close(fd);
1263 errno = saved_errno;
1264 return -1;
1266 ZERO_STRUCTP(bsds);
1267 bsds->fd = fd;
1268 talloc_set_destructor(bsds, tdgram_bsd_destructor);
1270 #ifdef HAVE_IPV6
1271 if (do_ipv6only) {
1272 int val = 1;
1274 ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
1275 (const void *)&val, sizeof(val));
1276 if (ret == -1) {
1277 int saved_errno = errno;
1278 talloc_free(dgram);
1279 errno = saved_errno;
1280 return -1;
1283 #endif
1285 if (broadcast) {
1286 int val = 1;
1288 ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
1289 (const void *)&val, sizeof(val));
1290 if (ret == -1) {
1291 int saved_errno = errno;
1292 talloc_free(dgram);
1293 errno = saved_errno;
1294 return -1;
1298 if (do_reuseaddr) {
1299 int val = 1;
1301 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1302 (const void *)&val, sizeof(val));
1303 if (ret == -1) {
1304 int saved_errno = errno;
1305 talloc_free(dgram);
1306 errno = saved_errno;
1307 return -1;
1311 if (do_bind) {
1312 ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
1313 if (ret == -1) {
1314 int saved_errno = errno;
1315 talloc_free(dgram);
1316 errno = saved_errno;
1317 return -1;
1321 if (rbsda) {
1322 if (rbsda->u.sa.sa_family != sa_fam) {
1323 talloc_free(dgram);
1324 errno = EINVAL;
1325 return -1;
1328 ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
1329 if (ret == -1) {
1330 int saved_errno = errno;
1331 talloc_free(dgram);
1332 errno = saved_errno;
1333 return -1;
1337 *_dgram = dgram;
1338 return 0;
1341 int _tdgram_inet_udp_socket(const struct tsocket_address *local,
1342 const struct tsocket_address *remote,
1343 TALLOC_CTX *mem_ctx,
1344 struct tdgram_context **dgram,
1345 const char *location)
1347 struct tsocket_address_bsd *lbsda =
1348 talloc_get_type_abort(local->private_data,
1349 struct tsocket_address_bsd);
1350 int ret;
1352 switch (lbsda->u.sa.sa_family) {
1353 case AF_INET:
1354 break;
1355 #ifdef HAVE_IPV6
1356 case AF_INET6:
1357 break;
1358 #endif
1359 default:
1360 errno = EINVAL;
1361 return -1;
1364 ret = tdgram_bsd_dgram_socket(local, remote, false,
1365 mem_ctx, dgram, location);
1367 return ret;
1370 int _tdgram_unix_socket(const struct tsocket_address *local,
1371 const struct tsocket_address *remote,
1372 TALLOC_CTX *mem_ctx,
1373 struct tdgram_context **dgram,
1374 const char *location)
1376 struct tsocket_address_bsd *lbsda =
1377 talloc_get_type_abort(local->private_data,
1378 struct tsocket_address_bsd);
1379 int ret;
1381 switch (lbsda->u.sa.sa_family) {
1382 case AF_UNIX:
1383 break;
1384 default:
1385 errno = EINVAL;
1386 return -1;
1389 ret = tdgram_bsd_dgram_socket(local, remote, false,
1390 mem_ctx, dgram, location);
1392 return ret;
1395 struct tstream_bsd {
1396 int fd;
1398 void *event_ptr;
1399 struct tevent_fd *fde;
1401 void *readable_private;
1402 void (*readable_handler)(void *private_data);
1403 void *writeable_private;
1404 void (*writeable_handler)(void *private_data);
1407 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1408 struct tevent_fd *fde,
1409 uint16_t flags,
1410 void *private_data)
1412 struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1413 struct tstream_bsd);
1415 if (flags & TEVENT_FD_WRITE) {
1416 bsds->writeable_handler(bsds->writeable_private);
1417 return;
1419 if (flags & TEVENT_FD_READ) {
1420 if (!bsds->readable_handler) {
1421 if (bsds->writeable_handler) {
1422 bsds->writeable_handler(bsds->writeable_private);
1423 return;
1425 TEVENT_FD_NOT_READABLE(bsds->fde);
1426 return;
1428 bsds->readable_handler(bsds->readable_private);
1429 return;
1433 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1434 struct tevent_context *ev,
1435 void (*handler)(void *private_data),
1436 void *private_data)
1438 if (ev == NULL) {
1439 if (handler) {
1440 errno = EINVAL;
1441 return -1;
1443 if (!bsds->readable_handler) {
1444 return 0;
1446 bsds->readable_handler = NULL;
1447 bsds->readable_private = NULL;
1449 return 0;
1452 /* read and write must use the same tevent_context */
1453 if (bsds->event_ptr != ev) {
1454 if (bsds->readable_handler || bsds->writeable_handler) {
1455 errno = EINVAL;
1456 return -1;
1458 bsds->event_ptr = NULL;
1459 TALLOC_FREE(bsds->fde);
1462 if (tevent_fd_get_flags(bsds->fde) == 0) {
1463 TALLOC_FREE(bsds->fde);
1465 bsds->fde = tevent_add_fd(ev, bsds,
1466 bsds->fd, TEVENT_FD_READ,
1467 tstream_bsd_fde_handler,
1468 bsds);
1469 if (!bsds->fde) {
1470 errno = ENOMEM;
1471 return -1;
1474 /* cache the event context we're running on */
1475 bsds->event_ptr = ev;
1476 } else if (!bsds->readable_handler) {
1477 TEVENT_FD_READABLE(bsds->fde);
1480 bsds->readable_handler = handler;
1481 bsds->readable_private = private_data;
1483 return 0;
1486 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1487 struct tevent_context *ev,
1488 void (*handler)(void *private_data),
1489 void *private_data)
1491 if (ev == NULL) {
1492 if (handler) {
1493 errno = EINVAL;
1494 return -1;
1496 if (!bsds->writeable_handler) {
1497 return 0;
1499 bsds->writeable_handler = NULL;
1500 bsds->writeable_private = NULL;
1501 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1503 return 0;
1506 /* read and write must use the same tevent_context */
1507 if (bsds->event_ptr != ev) {
1508 if (bsds->readable_handler || bsds->writeable_handler) {
1509 errno = EINVAL;
1510 return -1;
1512 bsds->event_ptr = NULL;
1513 TALLOC_FREE(bsds->fde);
1516 if (tevent_fd_get_flags(bsds->fde) == 0) {
1517 TALLOC_FREE(bsds->fde);
1519 bsds->fde = tevent_add_fd(ev, bsds,
1520 bsds->fd,
1521 TEVENT_FD_READ | TEVENT_FD_WRITE,
1522 tstream_bsd_fde_handler,
1523 bsds);
1524 if (!bsds->fde) {
1525 errno = ENOMEM;
1526 return -1;
1529 /* cache the event context we're running on */
1530 bsds->event_ptr = ev;
1531 } else if (!bsds->writeable_handler) {
1532 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1533 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1534 tevent_fd_set_flags(bsds->fde, flags);
1537 bsds->writeable_handler = handler;
1538 bsds->writeable_private = private_data;
1540 return 0;
1543 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1545 struct tstream_bsd *bsds = tstream_context_data(stream,
1546 struct tstream_bsd);
1547 ssize_t ret;
1549 if (bsds->fd == -1) {
1550 errno = ENOTCONN;
1551 return -1;
1554 ret = tsocket_bsd_pending(bsds->fd);
1556 return ret;
1559 struct tstream_bsd_readv_state {
1560 struct tstream_context *stream;
1562 struct iovec *vector;
1563 size_t count;
1565 int ret;
1568 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1570 struct tstream_bsd *bsds = tstream_context_data(state->stream,
1571 struct tstream_bsd);
1573 tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1575 return 0;
1578 static void tstream_bsd_readv_handler(void *private_data);
1580 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1581 struct tevent_context *ev,
1582 struct tstream_context *stream,
1583 struct iovec *vector,
1584 size_t count)
1586 struct tevent_req *req;
1587 struct tstream_bsd_readv_state *state;
1588 struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1589 int ret;
1591 req = tevent_req_create(mem_ctx, &state,
1592 struct tstream_bsd_readv_state);
1593 if (!req) {
1594 return NULL;
1597 state->stream = stream;
1598 /* we make a copy of the vector so that we can modify it */
1599 state->vector = talloc_array(state, struct iovec, count);
1600 if (tevent_req_nomem(state->vector, req)) {
1601 goto post;
1603 memcpy(state->vector, vector, sizeof(struct iovec)*count);
1604 state->count = count;
1605 state->ret = 0;
1607 talloc_set_destructor(state, tstream_bsd_readv_destructor);
1609 if (bsds->fd == -1) {
1610 tevent_req_error(req, ENOTCONN);
1611 goto post;
1615 * this is a fast path, not waiting for the
1616 * socket to become explicit readable gains
1617 * about 10%-20% performance in benchmark tests.
1619 tstream_bsd_readv_handler(req);
1620 if (!tevent_req_is_in_progress(req)) {
1621 goto post;
1624 ret = tstream_bsd_set_readable_handler(bsds, ev,
1625 tstream_bsd_readv_handler,
1626 req);
1627 if (ret == -1) {
1628 tevent_req_error(req, errno);
1629 goto post;
1632 return req;
1634 post:
1635 tevent_req_post(req, ev);
1636 return req;
1639 static void tstream_bsd_readv_handler(void *private_data)
1641 struct tevent_req *req = talloc_get_type_abort(private_data,
1642 struct tevent_req);
1643 struct tstream_bsd_readv_state *state = tevent_req_data(req,
1644 struct tstream_bsd_readv_state);
1645 struct tstream_context *stream = state->stream;
1646 struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1647 int ret;
1648 int err;
1649 bool retry;
1651 ret = readv(bsds->fd, state->vector, state->count);
1652 if (ret == 0) {
1653 /* propagate end of file */
1654 tevent_req_error(req, EPIPE);
1655 return;
1657 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1658 if (retry) {
1659 /* retry later */
1660 return;
1662 if (tevent_req_error(req, err)) {
1663 return;
1666 state->ret += ret;
1668 while (ret > 0) {
1669 if (ret < state->vector[0].iov_len) {
1670 uint8_t *base;
1671 base = (uint8_t *)state->vector[0].iov_base;
1672 base += ret;
1673 state->vector[0].iov_base = (void *)base;
1674 state->vector[0].iov_len -= ret;
1675 break;
1677 ret -= state->vector[0].iov_len;
1678 state->vector += 1;
1679 state->count -= 1;
1683 * there're maybe some empty vectors at the end
1684 * which we need to skip, otherwise we would get
1685 * ret == 0 from the readv() call and return EPIPE
1687 while (state->count > 0) {
1688 if (state->vector[0].iov_len > 0) {
1689 break;
1691 state->vector += 1;
1692 state->count -= 1;
1695 if (state->count > 0) {
1696 /* we have more to read */
1697 return;
1700 tevent_req_done(req);
1703 static int tstream_bsd_readv_recv(struct tevent_req *req,
1704 int *perrno)
1706 struct tstream_bsd_readv_state *state = tevent_req_data(req,
1707 struct tstream_bsd_readv_state);
1708 int ret;
1710 ret = tsocket_simple_int_recv(req, perrno);
1711 if (ret == 0) {
1712 ret = state->ret;
1715 tevent_req_received(req);
1716 return ret;
1719 struct tstream_bsd_writev_state {
1720 struct tstream_context *stream;
1722 struct iovec *vector;
1723 size_t count;
1725 int ret;
1728 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1730 struct tstream_bsd *bsds = tstream_context_data(state->stream,
1731 struct tstream_bsd);
1733 tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1735 return 0;
1738 static void tstream_bsd_writev_handler(void *private_data);
1740 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1741 struct tevent_context *ev,
1742 struct tstream_context *stream,
1743 const struct iovec *vector,
1744 size_t count)
1746 struct tevent_req *req;
1747 struct tstream_bsd_writev_state *state;
1748 struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1749 int ret;
1751 req = tevent_req_create(mem_ctx, &state,
1752 struct tstream_bsd_writev_state);
1753 if (!req) {
1754 return NULL;
1757 state->stream = stream;
1758 /* we make a copy of the vector so that we can modify it */
1759 state->vector = talloc_array(state, struct iovec, count);
1760 if (tevent_req_nomem(state->vector, req)) {
1761 goto post;
1763 memcpy(state->vector, vector, sizeof(struct iovec)*count);
1764 state->count = count;
1765 state->ret = 0;
1767 talloc_set_destructor(state, tstream_bsd_writev_destructor);
1769 if (bsds->fd == -1) {
1770 tevent_req_error(req, ENOTCONN);
1771 goto post;
1775 * this is a fast path, not waiting for the
1776 * socket to become explicit writeable gains
1777 * about 10%-20% performance in benchmark tests.
1779 tstream_bsd_writev_handler(req);
1780 if (!tevent_req_is_in_progress(req)) {
1781 goto post;
1784 ret = tstream_bsd_set_writeable_handler(bsds, ev,
1785 tstream_bsd_writev_handler,
1786 req);
1787 if (ret == -1) {
1788 tevent_req_error(req, errno);
1789 goto post;
1792 return req;
1794 post:
1795 tevent_req_post(req, ev);
1796 return req;
1799 static void tstream_bsd_writev_handler(void *private_data)
1801 struct tevent_req *req = talloc_get_type_abort(private_data,
1802 struct tevent_req);
1803 struct tstream_bsd_writev_state *state = tevent_req_data(req,
1804 struct tstream_bsd_writev_state);
1805 struct tstream_context *stream = state->stream;
1806 struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1807 ssize_t ret;
1808 int err;
1809 bool retry;
1811 ret = writev(bsds->fd, state->vector, state->count);
1812 if (ret == 0) {
1813 /* propagate end of file */
1814 tevent_req_error(req, EPIPE);
1815 return;
1817 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1818 if (retry) {
1819 /* retry later */
1820 return;
1822 if (tevent_req_error(req, err)) {
1823 return;
1826 state->ret += ret;
1828 while (ret > 0) {
1829 if (ret < state->vector[0].iov_len) {
1830 uint8_t *base;
1831 base = (uint8_t *)state->vector[0].iov_base;
1832 base += ret;
1833 state->vector[0].iov_base = (void *)base;
1834 state->vector[0].iov_len -= ret;
1835 break;
1837 ret -= state->vector[0].iov_len;
1838 state->vector += 1;
1839 state->count -= 1;
1843 * there're maybe some empty vectors at the end
1844 * which we need to skip, otherwise we would get
1845 * ret == 0 from the writev() call and return EPIPE
1847 while (state->count > 0) {
1848 if (state->vector[0].iov_len > 0) {
1849 break;
1851 state->vector += 1;
1852 state->count -= 1;
1855 if (state->count > 0) {
1856 /* we have more to read */
1857 return;
1860 tevent_req_done(req);
1863 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1865 struct tstream_bsd_writev_state *state = tevent_req_data(req,
1866 struct tstream_bsd_writev_state);
1867 int ret;
1869 ret = tsocket_simple_int_recv(req, perrno);
1870 if (ret == 0) {
1871 ret = state->ret;
1874 tevent_req_received(req);
1875 return ret;
1878 struct tstream_bsd_disconnect_state {
1879 void *__dummy;
1882 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1883 struct tevent_context *ev,
1884 struct tstream_context *stream)
1886 struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1887 struct tevent_req *req;
1888 struct tstream_bsd_disconnect_state *state;
1889 int ret;
1890 int err;
1891 bool dummy;
1893 req = tevent_req_create(mem_ctx, &state,
1894 struct tstream_bsd_disconnect_state);
1895 if (req == NULL) {
1896 return NULL;
1899 if (bsds->fd == -1) {
1900 tevent_req_error(req, ENOTCONN);
1901 goto post;
1904 TALLOC_FREE(bsds->fde);
1905 ret = close(bsds->fd);
1906 bsds->fd = -1;
1907 err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1908 if (tevent_req_error(req, err)) {
1909 goto post;
1912 tevent_req_done(req);
1913 post:
1914 tevent_req_post(req, ev);
1915 return req;
1918 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
1919 int *perrno)
1921 int ret;
1923 ret = tsocket_simple_int_recv(req, perrno);
1925 tevent_req_received(req);
1926 return ret;
1929 static const struct tstream_context_ops tstream_bsd_ops = {
1930 .name = "bsd",
1932 .pending_bytes = tstream_bsd_pending_bytes,
1934 .readv_send = tstream_bsd_readv_send,
1935 .readv_recv = tstream_bsd_readv_recv,
1937 .writev_send = tstream_bsd_writev_send,
1938 .writev_recv = tstream_bsd_writev_recv,
1940 .disconnect_send = tstream_bsd_disconnect_send,
1941 .disconnect_recv = tstream_bsd_disconnect_recv,
1944 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
1946 TALLOC_FREE(bsds->fde);
1947 if (bsds->fd != -1) {
1948 close(bsds->fd);
1949 bsds->fd = -1;
1951 return 0;
1954 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
1955 int fd,
1956 struct tstream_context **_stream,
1957 const char *location)
1959 struct tstream_context *stream;
1960 struct tstream_bsd *bsds;
1962 stream = tstream_context_create(mem_ctx,
1963 &tstream_bsd_ops,
1964 &bsds,
1965 struct tstream_bsd,
1966 location);
1967 if (!stream) {
1968 return -1;
1970 ZERO_STRUCTP(bsds);
1971 bsds->fd = fd;
1972 talloc_set_destructor(bsds, tstream_bsd_destructor);
1974 *_stream = stream;
1975 return 0;
1978 struct tstream_bsd_connect_state {
1979 int fd;
1980 struct tevent_fd *fde;
1981 struct tstream_conext *stream;
1982 struct tsocket_address *local;
1985 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
1987 TALLOC_FREE(state->fde);
1988 if (state->fd != -1) {
1989 close(state->fd);
1990 state->fd = -1;
1993 return 0;
1996 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
1997 struct tevent_fd *fde,
1998 uint16_t flags,
1999 void *private_data);
2001 static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
2002 struct tevent_context *ev,
2003 int sys_errno,
2004 const struct tsocket_address *local,
2005 const struct tsocket_address *remote)
2007 struct tevent_req *req;
2008 struct tstream_bsd_connect_state *state;
2009 struct tsocket_address_bsd *lbsda =
2010 talloc_get_type_abort(local->private_data,
2011 struct tsocket_address_bsd);
2012 struct tsocket_address_bsd *lrbsda = NULL;
2013 struct tsocket_address_bsd *rbsda =
2014 talloc_get_type_abort(remote->private_data,
2015 struct tsocket_address_bsd);
2016 int ret;
2017 int err;
2018 bool retry;
2019 bool do_bind = false;
2020 bool do_reuseaddr = false;
2021 bool do_ipv6only = false;
2022 bool is_inet = false;
2023 int sa_fam = lbsda->u.sa.sa_family;
2025 req = tevent_req_create(mem_ctx, &state,
2026 struct tstream_bsd_connect_state);
2027 if (!req) {
2028 return NULL;
2030 state->fd = -1;
2031 state->fde = NULL;
2033 talloc_set_destructor(state, tstream_bsd_connect_destructor);
2035 /* give the wrappers a chance to report an error */
2036 if (sys_errno != 0) {
2037 tevent_req_error(req, sys_errno);
2038 goto post;
2041 switch (lbsda->u.sa.sa_family) {
2042 case AF_UNIX:
2043 if (lbsda->u.un.sun_path[0] != 0) {
2044 do_reuseaddr = true;
2045 do_bind = true;
2047 break;
2048 case AF_INET:
2049 if (lbsda->u.in.sin_port != 0) {
2050 do_reuseaddr = true;
2051 do_bind = true;
2053 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2054 do_bind = true;
2056 is_inet = true;
2057 break;
2058 #ifdef HAVE_IPV6
2059 case AF_INET6:
2060 if (lbsda->u.in6.sin6_port != 0) {
2061 do_reuseaddr = true;
2062 do_bind = true;
2064 if (memcmp(&in6addr_any,
2065 &lbsda->u.in6.sin6_addr,
2066 sizeof(in6addr_any)) != 0) {
2067 do_bind = true;
2069 is_inet = true;
2070 do_ipv6only = true;
2071 break;
2072 #endif
2073 default:
2074 tevent_req_error(req, EINVAL);
2075 goto post;
2078 if (!do_bind && is_inet) {
2079 sa_fam = rbsda->u.sa.sa_family;
2080 switch (sa_fam) {
2081 case AF_INET:
2082 do_ipv6only = false;
2083 break;
2084 #ifdef HAVE_IPV6
2085 case AF_INET6:
2086 do_ipv6only = true;
2087 break;
2088 #endif
2092 if (is_inet) {
2093 state->local = tsocket_address_create(state,
2094 &tsocket_address_bsd_ops,
2095 &lrbsda,
2096 struct tsocket_address_bsd,
2097 __location__ "bsd_connect");
2098 if (tevent_req_nomem(state->local, req)) {
2099 goto post;
2102 ZERO_STRUCTP(lrbsda);
2103 lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
2104 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
2105 lrbsda->u.sa.sa_len = lrbsda->sa_socklen;
2106 #endif
2109 state->fd = socket(sa_fam, SOCK_STREAM, 0);
2110 if (state->fd == -1) {
2111 tevent_req_error(req, errno);
2112 goto post;
2115 state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2116 if (state->fd == -1) {
2117 tevent_req_error(req, errno);
2118 goto post;
2121 #ifdef HAVE_IPV6
2122 if (do_ipv6only) {
2123 int val = 1;
2125 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2126 (const void *)&val, sizeof(val));
2127 if (ret == -1) {
2128 tevent_req_error(req, errno);
2129 goto post;
2132 #endif
2134 if (do_reuseaddr) {
2135 int val = 1;
2137 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2138 (const void *)&val, sizeof(val));
2139 if (ret == -1) {
2140 tevent_req_error(req, errno);
2141 goto post;
2145 if (do_bind) {
2146 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2147 if (ret == -1) {
2148 tevent_req_error(req, errno);
2149 goto post;
2153 if (rbsda->u.sa.sa_family != sa_fam) {
2154 tevent_req_error(req, EINVAL);
2155 goto post;
2158 ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2159 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2160 if (retry) {
2161 /* retry later */
2162 goto async;
2164 if (tevent_req_error(req, err)) {
2165 goto post;
2168 if (!state->local) {
2169 tevent_req_done(req);
2170 goto post;
2173 ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2174 if (ret == -1) {
2175 tevent_req_error(req, errno);
2176 goto post;
2179 tevent_req_done(req);
2180 goto post;
2182 async:
2183 state->fde = tevent_add_fd(ev, state,
2184 state->fd,
2185 TEVENT_FD_READ | TEVENT_FD_WRITE,
2186 tstream_bsd_connect_fde_handler,
2187 req);
2188 if (tevent_req_nomem(state->fde, req)) {
2189 goto post;
2192 return req;
2194 post:
2195 tevent_req_post(req, ev);
2196 return req;
2199 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2200 struct tevent_fd *fde,
2201 uint16_t flags,
2202 void *private_data)
2204 struct tevent_req *req = talloc_get_type_abort(private_data,
2205 struct tevent_req);
2206 struct tstream_bsd_connect_state *state = tevent_req_data(req,
2207 struct tstream_bsd_connect_state);
2208 struct tsocket_address_bsd *lrbsda = NULL;
2209 int ret;
2210 int error=0;
2211 socklen_t len = sizeof(error);
2212 int err;
2213 bool retry;
2215 ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2216 if (ret == 0) {
2217 if (error != 0) {
2218 errno = error;
2219 ret = -1;
2222 err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2223 if (retry) {
2224 /* retry later */
2225 return;
2227 if (tevent_req_error(req, err)) {
2228 return;
2231 if (!state->local) {
2232 tevent_req_done(req);
2233 return;
2236 lrbsda = talloc_get_type_abort(state->local->private_data,
2237 struct tsocket_address_bsd);
2239 ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2240 if (ret == -1) {
2241 tevent_req_error(req, errno);
2242 return;
2245 tevent_req_done(req);
2248 static int tstream_bsd_connect_recv(struct tevent_req *req,
2249 int *perrno,
2250 TALLOC_CTX *mem_ctx,
2251 struct tstream_context **stream,
2252 struct tsocket_address **local,
2253 const char *location)
2255 struct tstream_bsd_connect_state *state = tevent_req_data(req,
2256 struct tstream_bsd_connect_state);
2257 int ret;
2259 ret = tsocket_simple_int_recv(req, perrno);
2260 if (ret == 0) {
2261 ret = _tstream_bsd_existing_socket(mem_ctx,
2262 state->fd,
2263 stream,
2264 location);
2265 if (ret == -1) {
2266 *perrno = errno;
2267 goto done;
2269 TALLOC_FREE(state->fde);
2270 state->fd = -1;
2272 if (local) {
2273 *local = talloc_move(mem_ctx, &state->local);
2277 done:
2278 tevent_req_received(req);
2279 return ret;
2282 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2283 struct tevent_context *ev,
2284 const struct tsocket_address *local,
2285 const struct tsocket_address *remote)
2287 struct tsocket_address_bsd *lbsda =
2288 talloc_get_type_abort(local->private_data,
2289 struct tsocket_address_bsd);
2290 struct tevent_req *req;
2291 int sys_errno = 0;
2293 switch (lbsda->u.sa.sa_family) {
2294 case AF_INET:
2295 break;
2296 #ifdef HAVE_IPV6
2297 case AF_INET6:
2298 break;
2299 #endif
2300 default:
2301 sys_errno = EINVAL;
2302 break;
2305 req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2307 return req;
2310 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2311 int *perrno,
2312 TALLOC_CTX *mem_ctx,
2313 struct tstream_context **stream,
2314 struct tsocket_address **local,
2315 const char *location)
2317 return tstream_bsd_connect_recv(req, perrno,
2318 mem_ctx, stream, local,
2319 location);
2322 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2323 struct tevent_context *ev,
2324 const struct tsocket_address *local,
2325 const struct tsocket_address *remote)
2327 struct tsocket_address_bsd *lbsda =
2328 talloc_get_type_abort(local->private_data,
2329 struct tsocket_address_bsd);
2330 struct tevent_req *req;
2331 int sys_errno = 0;
2333 switch (lbsda->u.sa.sa_family) {
2334 case AF_UNIX:
2335 break;
2336 default:
2337 sys_errno = EINVAL;
2338 break;
2341 req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2343 return req;
2346 int _tstream_unix_connect_recv(struct tevent_req *req,
2347 int *perrno,
2348 TALLOC_CTX *mem_ctx,
2349 struct tstream_context **stream,
2350 const char *location)
2352 return tstream_bsd_connect_recv(req, perrno,
2353 mem_ctx, stream, NULL,
2354 location);
2357 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2358 struct tstream_context **_stream1,
2359 TALLOC_CTX *mem_ctx2,
2360 struct tstream_context **_stream2,
2361 const char *location)
2363 int ret;
2364 int fds[2];
2365 int fd1;
2366 int fd2;
2367 struct tstream_context *stream1 = NULL;
2368 struct tstream_context *stream2 = NULL;
2370 ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2371 if (ret == -1) {
2372 return -1;
2374 fd1 = fds[0];
2375 fd2 = fds[1];
2377 fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2378 if (fd1 == -1) {
2379 int sys_errno = errno;
2380 close(fd2);
2381 errno = sys_errno;
2382 return -1;
2385 fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2386 if (fd2 == -1) {
2387 int sys_errno = errno;
2388 close(fd1);
2389 errno = sys_errno;
2390 return -1;
2393 ret = _tstream_bsd_existing_socket(mem_ctx1,
2394 fd1,
2395 &stream1,
2396 location);
2397 if (ret == -1) {
2398 int sys_errno = errno;
2399 close(fd1);
2400 close(fd2);
2401 errno = sys_errno;
2402 return -1;
2405 ret = _tstream_bsd_existing_socket(mem_ctx2,
2406 fd2,
2407 &stream2,
2408 location);
2409 if (ret == -1) {
2410 int sys_errno = errno;
2411 talloc_free(stream1);
2412 close(fd2);
2413 errno = sys_errno;
2414 return -1;
2417 *_stream1 = stream1;
2418 *_stream2 = stream2;
2419 return 0;