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->hello_flags & KDBUS_HELLO_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;
629 static int bus_socket_start_auth_client(sd_bus *b) {
631 const char *auth_suffix, *auth_prefix;
635 if (b->anonymous_auth) {
636 auth_prefix = "\0AUTH ANONYMOUS ";
638 /* For ANONYMOUS auth we send some arbitrary "trace" string */
640 b->auth_buffer = hexmem("anonymous", l);
642 char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
644 auth_prefix = "\0AUTH EXTERNAL ";
646 snprintf(text, sizeof(text), "%lu", (unsigned long) geteuid());
650 b->auth_buffer = hexmem(text, l);
656 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD)
657 auth_suffix = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
659 auth_suffix = "\r\nBEGIN\r\n";
661 b->auth_iovec[0].iov_base = (void*) auth_prefix;
662 b->auth_iovec[0].iov_len = 1 + strlen(auth_prefix + 1);
663 b->auth_iovec[1].iov_base = (void*) b->auth_buffer;
664 b->auth_iovec[1].iov_len = l * 2;
665 b->auth_iovec[2].iov_base = (void*) auth_suffix;
666 b->auth_iovec[2].iov_len = strlen(auth_suffix);
668 return bus_socket_write_auth(b);
671 int bus_socket_start_auth(sd_bus *b) {
674 b->state = BUS_AUTHENTICATING;
675 b->auth_timeout = now(CLOCK_MONOTONIC) + BUS_DEFAULT_TIMEOUT;
677 if (sd_is_socket(b->input_fd, AF_UNIX, 0, 0) <= 0)
678 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
680 if (b->output_fd != b->input_fd)
681 if (sd_is_socket(b->output_fd, AF_UNIX, 0, 0) <= 0)
682 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
685 return bus_socket_read_auth(b);
687 return bus_socket_start_auth_client(b);
690 int bus_socket_connect(sd_bus *b) {
694 assert(b->input_fd < 0);
695 assert(b->output_fd < 0);
696 assert(b->sockaddr.sa.sa_family != AF_UNSPEC);
698 b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
702 b->output_fd = b->input_fd;
704 r = bus_socket_setup(b);
708 r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
710 if (errno == EINPROGRESS)
716 return bus_socket_start_auth(b);
719 int bus_socket_exec(sd_bus *b) {
724 assert(b->input_fd < 0);
725 assert(b->output_fd < 0);
726 assert(b->exec_path);
728 r = socketpair(AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, s);
740 reset_all_signal_handlers();
742 close_all_fds(s+1, 1);
744 assert_se(dup3(s[1], STDIN_FILENO, 0) == STDIN_FILENO);
745 assert_se(dup3(s[1], STDOUT_FILENO, 0) == STDOUT_FILENO);
747 if (s[1] != STDIN_FILENO && s[1] != STDOUT_FILENO)
748 close_nointr_nofail(s[1]);
750 fd_cloexec(STDIN_FILENO, false);
751 fd_cloexec(STDOUT_FILENO, false);
752 fd_nonblock(STDIN_FILENO, false);
753 fd_nonblock(STDOUT_FILENO, false);
756 execvp(b->exec_path, b->exec_argv);
758 const char *argv[] = { b->exec_path, NULL };
759 execvp(b->exec_path, (char**) argv);
765 close_nointr_nofail(s[1]);
766 b->output_fd = b->input_fd = s[0];
768 return bus_socket_start_auth(b);
771 int bus_socket_take_fd(sd_bus *b) {
775 r = bus_socket_setup(b);
779 return bus_socket_start_auth(b);
782 int bus_socket_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
792 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
794 if (*idx >= BUS_MESSAGE_SIZE(m))
797 r = bus_message_setup_iovec(m);
801 n = m->n_iovec * sizeof(struct iovec);
803 memcpy(iov, m->iovec, n);
806 iovec_advance(iov, &j, *idx);
808 if (bus->prefer_writev)
809 k = writev(bus->output_fd, iov, m->n_iovec);
815 struct cmsghdr *control;
816 control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
818 mh.msg_control = control;
819 control->cmsg_level = SOL_SOCKET;
820 control->cmsg_type = SCM_RIGHTS;
821 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
822 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
826 mh.msg_iovlen = m->n_iovec;
828 k = sendmsg(bus->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
829 if (k < 0 && errno == ENOTSOCK) {
830 bus->prefer_writev = true;
831 k = writev(bus->output_fd, iov, m->n_iovec);
836 return errno == EAGAIN ? 0 : -errno;
842 static int bus_socket_read_message_need(sd_bus *bus, size_t *need) {
849 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
851 if (bus->rbuffer_size < sizeof(struct bus_header)) {
852 *need = sizeof(struct bus_header) + 8;
854 /* Minimum message size:
858 * Method Call: +2 string headers
859 * Signal: +3 string headers
860 * Method Error: +1 string headers
862 * Method Reply: +1 uint32 headers
864 * A string header is at least 9 bytes
865 * A uint32 header is at least 8 bytes
867 * Hence the minimum message size of a valid message
868 * is header + 8 bytes */
873 a = ((const uint32_t*) bus->rbuffer)[1];
874 b = ((const uint32_t*) bus->rbuffer)[3];
876 e = ((const uint8_t*) bus->rbuffer)[0];
877 if (e == SD_BUS_LITTLE_ENDIAN) {
880 } else if (e == SD_BUS_BIG_ENDIAN) {
886 sum = (uint64_t) sizeof(struct bus_header) + (uint64_t) ALIGN_TO(b, 8) + (uint64_t) a;
887 if (sum >= BUS_MESSAGE_SIZE_MAX)
890 *need = (size_t) sum;
894 static int bus_socket_make_message(sd_bus *bus, size_t size, sd_bus_message **m) {
901 assert(bus->rbuffer_size >= size);
902 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
904 if (bus->rbuffer_size > size) {
905 b = memdup((const uint8_t*) bus->rbuffer + size,
906 bus->rbuffer_size - size);
912 r = bus_message_from_malloc(bus,
914 bus->fds, bus->n_fds,
915 bus->ucred_valid ? &bus->ucred : NULL,
916 bus->label[0] ? bus->label : NULL,
924 bus->rbuffer_size -= size;
933 int bus_socket_read_message(sd_bus *bus, sd_bus_message **m) {
941 struct cmsghdr cmsghdr;
942 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
943 CMSG_SPACE(sizeof(struct ucred)) +
944 CMSG_SPACE(NAME_MAX)]; /*selinux label */
946 struct cmsghdr *cmsg;
947 bool handle_cmsg = false;
951 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
953 r = bus_socket_read_message_need(bus, &need);
957 if (bus->rbuffer_size >= need)
958 return bus_socket_make_message(bus, need, m);
960 b = realloc(bus->rbuffer, need);
967 iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
968 iov.iov_len = need - bus->rbuffer_size;
970 if (bus->prefer_readv)
971 k = readv(bus->input_fd, &iov, 1);
976 mh.msg_control = &control;
977 mh.msg_controllen = sizeof(control);
979 k = recvmsg(bus->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
980 if (k < 0 && errno == ENOTSOCK) {
981 bus->prefer_readv = true;
982 k = readv(bus->input_fd, &iov, 1);
987 return errno == EAGAIN ? 0 : -errno;
991 bus->rbuffer_size += k;
994 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
995 if (cmsg->cmsg_level == SOL_SOCKET &&
996 cmsg->cmsg_type == SCM_RIGHTS) {
999 n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
1001 if (!bus->can_fds) {
1002 /* Whut? We received fds but this
1003 * isn't actually enabled? Close them,
1006 close_many((int*) CMSG_DATA(cmsg), n);
1010 f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
1012 close_many((int*) CMSG_DATA(cmsg), n);
1016 memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
1019 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1020 cmsg->cmsg_type == SCM_CREDENTIALS &&
1021 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1023 /* Ignore bogus data, which we might
1024 * get on socketpair() sockets */
1025 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
1026 memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
1027 bus->ucred_valid = true;
1030 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1031 cmsg->cmsg_type == SCM_SECURITY) {
1034 l = cmsg->cmsg_len - CMSG_LEN(0);
1036 memcpy(&bus->label, CMSG_DATA(cmsg), l);
1043 r = bus_socket_read_message_need(bus, &need);
1047 if (bus->rbuffer_size >= need)
1048 return bus_socket_make_message(bus, need, m);
1053 int bus_socket_process_opening(sd_bus *b) {
1055 socklen_t slen = sizeof(error);
1062 assert(b->state == BUS_OPENING);
1068 if (!(p.revents & (POLLOUT|POLLERR|POLLHUP)))
1071 r = getsockopt(b->output_fd, SOL_SOCKET, SO_ERROR, &error, &slen);
1073 b->last_connect_error = errno;
1074 else if (error != 0)
1075 b->last_connect_error = error;
1076 else if (p.revents & (POLLERR|POLLHUP))
1077 b->last_connect_error = ECONNREFUSED;
1079 return bus_socket_start_auth(b);
1081 return bus_next_address(b);
1084 int bus_socket_process_authenticating(sd_bus *b) {
1088 assert(b->state == BUS_AUTHENTICATING);
1090 if (now(CLOCK_MONOTONIC) >= b->auth_timeout)
1093 r = bus_socket_write_auth(b);
1097 return bus_socket_read_auth(b);