1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
34 #include "sd-daemon.h"
37 #include "bus-socket.h"
38 #include "bus-internal.h"
39 #include "bus-message.h"
41 static void iovec_advance(struct iovec iov[], unsigned *idx, size_t size) {
44 struct iovec *i = iov + *idx;
46 if (i->iov_len > size) {
47 i->iov_base = (uint8_t*) i->iov_base + size;
61 static int append_iovec(sd_bus_message *m, const void *p, size_t sz) {
66 m->iovec[m->n_iovec].iov_base = (void*) p;
67 m->iovec[m->n_iovec].iov_len = sz;
73 static int bus_message_setup_iovec(sd_bus_message *m) {
74 struct bus_body_part *part;
86 n = 1 + m->n_body_parts;
87 if (n < ELEMENTSOF(m->iovec_fixed))
88 m->iovec = m->iovec_fixed;
90 m->iovec = new(struct iovec, n);
97 r = append_iovec(m, m->header, BUS_MESSAGE_BODY_BEGIN(m));
101 MESSAGE_FOREACH_PART(part, i, m) {
102 r = bus_body_part_map(part);
106 r = append_iovec(m, part->data, part->size);
111 assert(n == m->n_iovec);
120 bool bus_socket_auth_needs_write(sd_bus *b) {
124 if (b->auth_index >= ELEMENTSOF(b->auth_iovec))
127 for (i = b->auth_index; i < ELEMENTSOF(b->auth_iovec); i++) {
128 struct iovec *j = b->auth_iovec + i;
137 static int bus_socket_write_auth(sd_bus *b) {
141 assert(b->state == BUS_AUTHENTICATING);
143 if (!bus_socket_auth_needs_write(b))
146 if (b->prefer_writev)
147 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
152 mh.msg_iov = b->auth_iovec + b->auth_index;
153 mh.msg_iovlen = ELEMENTSOF(b->auth_iovec) - b->auth_index;
155 k = sendmsg(b->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
156 if (k < 0 && errno == ENOTSOCK) {
157 b->prefer_writev = true;
158 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
163 return errno == EAGAIN ? 0 : -errno;
165 iovec_advance(b->auth_iovec, &b->auth_index, (size_t) k);
169 static int bus_socket_auth_verify_client(sd_bus *b) {
177 /* We expect two response lines: "OK" and possibly
180 e = memmem(b->rbuffer, b->rbuffer_size, "\r\n", 2);
184 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD) {
185 f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
195 /* Nice! We got all the lines we need. First check the OK
198 if (e - (char*) b->rbuffer != 3 + 32)
201 if (memcmp(b->rbuffer, "OK ", 3))
204 b->auth = b->anonymous_auth ? BUS_AUTH_ANONYMOUS : BUS_AUTH_EXTERNAL;
206 for (i = 0; i < 32; i += 2) {
209 x = unhexchar(((char*) b->rbuffer)[3 + i]);
210 y = unhexchar(((char*) b->rbuffer)[3 + i + 1]);
215 peer.bytes[i/2] = ((uint8_t) x << 4 | (uint8_t) y);
218 if (!sd_id128_equal(b->server_id, SD_ID128_NULL) &&
219 !sd_id128_equal(b->server_id, peer))
224 /* And possibly check the second line, too */
228 (f - e == sizeof("\r\nAGREE_UNIX_FD") - 1) &&
229 memcmp(e + 2, "AGREE_UNIX_FD", sizeof("AGREE_UNIX_FD") - 1) == 0;
231 b->rbuffer_size -= (start - (char*) b->rbuffer);
232 memmove(b->rbuffer, start, b->rbuffer_size);
234 r = bus_start_running(b);
241 static bool line_equals(const char *s, size_t m, const char *line) {
248 return memcmp(s, line, l) == 0;
251 static bool line_begins(const char *s, size_t m, const char *word) {
258 if (memcmp(s, word, l) != 0)
261 return m == l || (m > l && s[l] == ' ');
264 static int verify_anonymous_token(sd_bus *b, const char *p, size_t l) {
265 _cleanup_free_ char *token = NULL;
267 if (!b->anonymous_auth)
278 token = unhexmem(p, l);
282 if (memchr(token, 0, l/2))
285 return !!utf8_is_valid(token);
288 static int verify_external_token(sd_bus *b, const char *p, size_t l) {
289 _cleanup_free_ char *token = NULL;
293 /* We don't do any real authentication here. Instead, we if
294 * the owner of this bus wanted authentication he should have
295 * checked SO_PEERCRED before even creating the bus object. */
297 if (!b->anonymous_auth && !b->ucred_valid)
309 token = unhexmem(p, l);
313 if (memchr(token, 0, l/2))
316 r = parse_uid(token, &u);
320 /* We ignore the passed value if anonymous authentication is
322 if (!b->anonymous_auth && u != b->ucred.uid)
328 static int bus_socket_auth_write(sd_bus *b, const char *t) {
335 /* We only make use of the first iovec */
336 assert(b->auth_index == 0 || b->auth_index == 1);
339 p = malloc(b->auth_iovec[0].iov_len + l);
343 memcpy(p, b->auth_iovec[0].iov_base, b->auth_iovec[0].iov_len);
344 memcpy(p + b->auth_iovec[0].iov_len, t, l);
346 b->auth_iovec[0].iov_base = p;
347 b->auth_iovec[0].iov_len += l;
349 free(b->auth_buffer);
355 static int bus_socket_auth_write_ok(sd_bus *b) {
356 char t[3 + 32 + 2 + 1];
360 snprintf(t, sizeof(t), "OK " SD_ID128_FORMAT_STR "\r\n", SD_ID128_FORMAT_VAL(b->server_id));
363 return bus_socket_auth_write(b, t);
366 static int bus_socket_auth_verify_server(sd_bus *b) {
370 bool processed = false;
375 if (b->rbuffer_size < 1)
378 /* First char must be a NUL byte */
379 if (*(char*) b->rbuffer != 0)
382 if (b->rbuffer_size < 3)
385 /* Begin with the first line */
386 if (b->auth_rbegin <= 0)
390 /* Check if line is complete */
391 line = (char*) b->rbuffer + b->auth_rbegin;
392 e = memmem(line, b->rbuffer_size - b->auth_rbegin, "\r\n", 2);
398 if (line_begins(line, l, "AUTH ANONYMOUS")) {
400 r = verify_anonymous_token(b, line + 14, l - 14);
404 r = bus_socket_auth_write(b, "REJECTED\r\n");
406 b->auth = BUS_AUTH_ANONYMOUS;
407 r = bus_socket_auth_write_ok(b);
410 } else if (line_begins(line, l, "AUTH EXTERNAL")) {
412 r = verify_external_token(b, line + 13, l - 13);
416 r = bus_socket_auth_write(b, "REJECTED\r\n");
418 b->auth = BUS_AUTH_EXTERNAL;
419 r = bus_socket_auth_write_ok(b);
422 } else if (line_begins(line, l, "AUTH"))
423 r = bus_socket_auth_write(b, "REJECTED EXTERNAL ANONYMOUS\r\n");
424 else if (line_equals(line, l, "CANCEL") ||
425 line_begins(line, l, "ERROR")) {
427 b->auth = _BUS_AUTH_INVALID;
428 r = bus_socket_auth_write(b, "REJECTED\r\n");
430 } else if (line_equals(line, l, "BEGIN")) {
432 if (b->auth == _BUS_AUTH_INVALID)
433 r = bus_socket_auth_write(b, "ERROR\r\n");
435 /* We can't leave from the auth phase
436 * before we haven't written
437 * everything queued, so let's check
440 if (bus_socket_auth_needs_write(b))
443 b->rbuffer_size -= (e + 2 - (char*) b->rbuffer);
444 memmove(b->rbuffer, e + 2, b->rbuffer_size);
445 return bus_start_running(b);
448 } else if (line_begins(line, l, "DATA")) {
450 if (b->auth == _BUS_AUTH_INVALID)
451 r = bus_socket_auth_write(b, "ERROR\r\n");
453 if (b->auth == BUS_AUTH_ANONYMOUS)
454 r = verify_anonymous_token(b, line + 4, l - 4);
456 r = verify_external_token(b, line + 4, l - 4);
461 b->auth = _BUS_AUTH_INVALID;
462 r = bus_socket_auth_write(b, "REJECTED\r\n");
464 r = bus_socket_auth_write_ok(b);
466 } else if (line_equals(line, l, "NEGOTIATE_UNIX_FD")) {
467 if (b->auth == _BUS_AUTH_INVALID || !(b->hello_flags & KDBUS_HELLO_ACCEPT_FD))
468 r = bus_socket_auth_write(b, "ERROR\r\n");
471 r = bus_socket_auth_write(b, "AGREE_UNIX_FD\r\n");
474 r = bus_socket_auth_write(b, "ERROR\r\n");
479 b->auth_rbegin = e + 2 - (char*) b->rbuffer;
485 static int bus_socket_auth_verify(sd_bus *b) {
489 return bus_socket_auth_verify_server(b);
491 return bus_socket_auth_verify_client(b);
494 static int bus_socket_read_auth(sd_bus *b) {
502 struct cmsghdr cmsghdr;
503 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
504 CMSG_SPACE(sizeof(struct ucred)) +
505 CMSG_SPACE(NAME_MAX)]; /*selinux label */
507 struct cmsghdr *cmsg;
508 bool handle_cmsg = false;
511 assert(b->state == BUS_AUTHENTICATING);
513 r = bus_socket_auth_verify(b);
517 n = MAX(256u, b->rbuffer_size * 2);
519 if (n > BUS_AUTH_SIZE_MAX)
520 n = BUS_AUTH_SIZE_MAX;
522 if (b->rbuffer_size >= n)
525 p = realloc(b->rbuffer, n);
532 iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
533 iov.iov_len = n - b->rbuffer_size;
536 k = readv(b->input_fd, &iov, 1);
541 mh.msg_control = &control;
542 mh.msg_controllen = sizeof(control);
544 k = recvmsg(b->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
545 if (k < 0 && errno == ENOTSOCK) {
546 b->prefer_readv = true;
547 k = readv(b->input_fd, &iov, 1);
552 return errno == EAGAIN ? 0 : -errno;
556 b->rbuffer_size += k;
559 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
560 if (cmsg->cmsg_level == SOL_SOCKET &&
561 cmsg->cmsg_type == SCM_RIGHTS) {
564 /* Whut? We received fds during the auth
565 * protocol? Somebody is playing games with
566 * us. Close them all, and fail */
567 j = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
568 close_many((int*) CMSG_DATA(cmsg), j);
571 } else if (cmsg->cmsg_level == SOL_SOCKET &&
572 cmsg->cmsg_type == SCM_CREDENTIALS &&
573 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
575 /* Ignore bogus data, which we might
576 * get on socketpair() sockets */
577 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
578 memcpy(&b->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
579 b->ucred_valid = true;
582 } else if (cmsg->cmsg_level == SOL_SOCKET &&
583 cmsg->cmsg_type == SCM_SECURITY) {
587 l = cmsg->cmsg_len - CMSG_LEN(0);
589 memcpy(&b->label, CMSG_DATA(cmsg), l);
596 r = bus_socket_auth_verify(b);
603 int bus_socket_setup(sd_bus *b) {
609 /* Enable SO_PASSCRED + SO_PASSEC. We try this on any
610 * socket, just in case. */
611 enable = !b->bus_client;
612 setsockopt(b->input_fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable));
614 enable = !b->bus_client && (b->attach_flags & KDBUS_ATTACH_SECLABEL);
615 setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
617 /* Increase the buffers to a MB */
618 fd_inc_rcvbuf(b->input_fd, 1024*1024);
619 fd_inc_sndbuf(b->output_fd, 1024*1024);
621 /* Get the peer for socketpair() sockets */
622 l = sizeof(b->ucred);
623 if (getsockopt(b->input_fd, SOL_SOCKET, SO_PEERCRED, &b->ucred, &l) >= 0 && l >= sizeof(b->ucred))
624 b->ucred_valid = b->ucred.pid > 0;
626 b->is_kernel = false;
627 b->message_version = 1;
632 static int bus_socket_start_auth_client(sd_bus *b) {
634 const char *auth_suffix, *auth_prefix;
638 if (b->anonymous_auth) {
639 auth_prefix = "\0AUTH ANONYMOUS ";
641 /* For ANONYMOUS auth we send some arbitrary "trace" string */
643 b->auth_buffer = hexmem("anonymous", l);
645 char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
647 auth_prefix = "\0AUTH EXTERNAL ";
649 snprintf(text, sizeof(text), "%lu", (unsigned long) geteuid());
653 b->auth_buffer = hexmem(text, l);
659 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD)
660 auth_suffix = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
662 auth_suffix = "\r\nBEGIN\r\n";
664 b->auth_iovec[0].iov_base = (void*) auth_prefix;
665 b->auth_iovec[0].iov_len = 1 + strlen(auth_prefix + 1);
666 b->auth_iovec[1].iov_base = (void*) b->auth_buffer;
667 b->auth_iovec[1].iov_len = l * 2;
668 b->auth_iovec[2].iov_base = (void*) auth_suffix;
669 b->auth_iovec[2].iov_len = strlen(auth_suffix);
671 return bus_socket_write_auth(b);
674 int bus_socket_start_auth(sd_bus *b) {
677 b->state = BUS_AUTHENTICATING;
678 b->auth_timeout = now(CLOCK_MONOTONIC) + BUS_DEFAULT_TIMEOUT;
680 if (sd_is_socket(b->input_fd, AF_UNIX, 0, 0) <= 0)
681 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
683 if (b->output_fd != b->input_fd)
684 if (sd_is_socket(b->output_fd, AF_UNIX, 0, 0) <= 0)
685 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
688 return bus_socket_read_auth(b);
690 return bus_socket_start_auth_client(b);
693 int bus_socket_connect(sd_bus *b) {
697 assert(b->input_fd < 0);
698 assert(b->output_fd < 0);
699 assert(b->sockaddr.sa.sa_family != AF_UNSPEC);
701 b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
705 b->output_fd = b->input_fd;
707 r = bus_socket_setup(b);
711 r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
713 if (errno == EINPROGRESS)
719 return bus_socket_start_auth(b);
722 int bus_socket_exec(sd_bus *b) {
727 assert(b->input_fd < 0);
728 assert(b->output_fd < 0);
729 assert(b->exec_path);
731 r = socketpair(AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, s);
743 reset_all_signal_handlers();
745 close_all_fds(s+1, 1);
747 assert_se(dup3(s[1], STDIN_FILENO, 0) == STDIN_FILENO);
748 assert_se(dup3(s[1], STDOUT_FILENO, 0) == STDOUT_FILENO);
750 if (s[1] != STDIN_FILENO && s[1] != STDOUT_FILENO)
751 close_nointr_nofail(s[1]);
753 fd_cloexec(STDIN_FILENO, false);
754 fd_cloexec(STDOUT_FILENO, false);
755 fd_nonblock(STDIN_FILENO, false);
756 fd_nonblock(STDOUT_FILENO, false);
759 execvp(b->exec_path, b->exec_argv);
761 const char *argv[] = { b->exec_path, NULL };
762 execvp(b->exec_path, (char**) argv);
768 close_nointr_nofail(s[1]);
769 b->output_fd = b->input_fd = s[0];
771 r = bus_socket_setup(b);
775 return bus_socket_start_auth(b);
778 int bus_socket_take_fd(sd_bus *b) {
782 r = bus_socket_setup(b);
786 return bus_socket_start_auth(b);
789 int bus_socket_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
799 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
801 if (*idx >= BUS_MESSAGE_SIZE(m))
804 r = bus_message_setup_iovec(m);
808 n = m->n_iovec * sizeof(struct iovec);
810 memcpy(iov, m->iovec, n);
813 iovec_advance(iov, &j, *idx);
815 if (bus->prefer_writev)
816 k = writev(bus->output_fd, iov, m->n_iovec);
822 struct cmsghdr *control;
823 control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
825 mh.msg_control = control;
826 control->cmsg_level = SOL_SOCKET;
827 control->cmsg_type = SCM_RIGHTS;
828 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
829 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
833 mh.msg_iovlen = m->n_iovec;
835 k = sendmsg(bus->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
836 if (k < 0 && errno == ENOTSOCK) {
837 bus->prefer_writev = true;
838 k = writev(bus->output_fd, iov, m->n_iovec);
843 return errno == EAGAIN ? 0 : -errno;
849 static int bus_socket_read_message_need(sd_bus *bus, size_t *need) {
856 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
858 if (bus->rbuffer_size < sizeof(struct bus_header)) {
859 *need = sizeof(struct bus_header) + 8;
861 /* Minimum message size:
865 * Method Call: +2 string headers
866 * Signal: +3 string headers
867 * Method Error: +1 string headers
869 * Method Reply: +1 uint32 headers
871 * A string header is at least 9 bytes
872 * A uint32 header is at least 8 bytes
874 * Hence the minimum message size of a valid message
875 * is header + 8 bytes */
880 a = ((const uint32_t*) bus->rbuffer)[1];
881 b = ((const uint32_t*) bus->rbuffer)[3];
883 e = ((const uint8_t*) bus->rbuffer)[0];
884 if (e == BUS_LITTLE_ENDIAN) {
887 } else if (e == BUS_BIG_ENDIAN) {
893 sum = (uint64_t) sizeof(struct bus_header) + (uint64_t) ALIGN_TO(b, 8) + (uint64_t) a;
894 if (sum >= BUS_MESSAGE_SIZE_MAX)
897 *need = (size_t) sum;
901 static int bus_socket_make_message(sd_bus *bus, size_t size) {
907 assert(bus->rbuffer_size >= size);
908 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
910 r = bus_rqueue_make_room(bus);
914 if (bus->rbuffer_size > size) {
915 b = memdup((const uint8_t*) bus->rbuffer + size,
916 bus->rbuffer_size - size);
922 r = bus_message_from_malloc(bus,
924 bus->fds, bus->n_fds,
925 bus->ucred_valid ? &bus->ucred : NULL,
926 bus->label[0] ? bus->label : NULL,
934 bus->rbuffer_size -= size;
939 bus->rqueue[bus->rqueue_size++] = t;
944 int bus_socket_read_message(sd_bus *bus) {
952 struct cmsghdr cmsghdr;
953 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
954 CMSG_SPACE(sizeof(struct ucred)) +
955 CMSG_SPACE(NAME_MAX)]; /*selinux label */
957 struct cmsghdr *cmsg;
958 bool handle_cmsg = false;
961 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
963 r = bus_socket_read_message_need(bus, &need);
967 if (bus->rbuffer_size >= need)
968 return bus_socket_make_message(bus, need);
970 b = realloc(bus->rbuffer, need);
977 iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
978 iov.iov_len = need - bus->rbuffer_size;
980 if (bus->prefer_readv)
981 k = readv(bus->input_fd, &iov, 1);
986 mh.msg_control = &control;
987 mh.msg_controllen = sizeof(control);
989 k = recvmsg(bus->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
990 if (k < 0 && errno == ENOTSOCK) {
991 bus->prefer_readv = true;
992 k = readv(bus->input_fd, &iov, 1);
997 return errno == EAGAIN ? 0 : -errno;
1001 bus->rbuffer_size += k;
1004 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
1005 if (cmsg->cmsg_level == SOL_SOCKET &&
1006 cmsg->cmsg_type == SCM_RIGHTS) {
1009 n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
1011 if (!bus->can_fds) {
1012 /* Whut? We received fds but this
1013 * isn't actually enabled? Close them,
1016 close_many((int*) CMSG_DATA(cmsg), n);
1020 f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
1022 close_many((int*) CMSG_DATA(cmsg), n);
1026 memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
1029 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1030 cmsg->cmsg_type == SCM_CREDENTIALS &&
1031 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1033 /* Ignore bogus data, which we might
1034 * get on socketpair() sockets */
1035 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
1036 memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
1037 bus->ucred_valid = true;
1040 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1041 cmsg->cmsg_type == SCM_SECURITY) {
1044 l = cmsg->cmsg_len - CMSG_LEN(0);
1046 memcpy(&bus->label, CMSG_DATA(cmsg), l);
1053 r = bus_socket_read_message_need(bus, &need);
1057 if (bus->rbuffer_size >= need)
1058 return bus_socket_make_message(bus, need);
1063 int bus_socket_process_opening(sd_bus *b) {
1065 socklen_t slen = sizeof(error);
1072 assert(b->state == BUS_OPENING);
1078 if (!(p.revents & (POLLOUT|POLLERR|POLLHUP)))
1081 r = getsockopt(b->output_fd, SOL_SOCKET, SO_ERROR, &error, &slen);
1083 b->last_connect_error = errno;
1084 else if (error != 0)
1085 b->last_connect_error = error;
1086 else if (p.revents & (POLLERR|POLLHUP))
1087 b->last_connect_error = ECONNREFUSED;
1089 return bus_socket_start_auth(b);
1091 return bus_next_address(b);
1094 int bus_socket_process_authenticating(sd_bus *b) {
1098 assert(b->state == BUS_AUTHENTICATING);
1100 if (now(CLOCK_MONOTONIC) >= b->auth_timeout)
1103 r = bus_socket_write_auth(b);
1107 return bus_socket_read_auth(b);