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->negotiate_fds) {
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->negotiate_fds)
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 static 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));
613 setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
615 /* Increase the buffers to a MB */
616 fd_inc_rcvbuf(b->input_fd, 1024*1024);
617 fd_inc_sndbuf(b->output_fd, 1024*1024);
619 /* Get the peer for socketpair() sockets */
620 l = sizeof(b->ucred);
621 if (getsockopt(b->input_fd, SOL_SOCKET, SO_PEERCRED, &b->ucred, &l) >= 0 && l >= sizeof(b->ucred))
622 b->ucred_valid = b->ucred.pid > 0;
627 static int bus_socket_start_auth_client(sd_bus *b) {
629 const char *auth_suffix, *auth_prefix;
633 if (b->anonymous_auth) {
634 auth_prefix = "\0AUTH ANONYMOUS ";
636 /* For ANONYMOUS auth we send some arbitrary "trace" string */
638 b->auth_buffer = hexmem("anonymous", l);
640 char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
642 auth_prefix = "\0AUTH EXTERNAL ";
644 snprintf(text, sizeof(text), "%lu", (unsigned long) geteuid());
648 b->auth_buffer = hexmem(text, l);
654 if (b->negotiate_fds)
655 auth_suffix = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
657 auth_suffix = "\r\nBEGIN\r\n";
659 b->auth_iovec[0].iov_base = (void*) auth_prefix;
660 b->auth_iovec[0].iov_len = 1 + strlen(auth_prefix + 1);
661 b->auth_iovec[1].iov_base = (void*) b->auth_buffer;
662 b->auth_iovec[1].iov_len = l * 2;
663 b->auth_iovec[2].iov_base = (void*) auth_suffix;
664 b->auth_iovec[2].iov_len = strlen(auth_suffix);
666 return bus_socket_write_auth(b);
669 static int bus_socket_start_auth(sd_bus *b) {
672 b->state = BUS_AUTHENTICATING;
673 b->auth_timeout = now(CLOCK_MONOTONIC) + BUS_DEFAULT_TIMEOUT;
675 if (sd_is_socket(b->input_fd, AF_UNIX, 0, 0) <= 0)
676 b->negotiate_fds = false;
678 if (b->output_fd != b->input_fd)
679 if (sd_is_socket(b->output_fd, AF_UNIX, 0, 0) <= 0)
680 b->negotiate_fds = false;
683 return bus_socket_read_auth(b);
685 return bus_socket_start_auth_client(b);
688 int bus_socket_connect(sd_bus *b) {
692 assert(b->input_fd < 0);
693 assert(b->output_fd < 0);
694 assert(b->sockaddr.sa.sa_family != AF_UNSPEC);
696 b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
700 b->output_fd = b->input_fd;
702 r = bus_socket_setup(b);
706 r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
708 if (errno == EINPROGRESS)
714 return bus_socket_start_auth(b);
717 int bus_socket_exec(sd_bus *b) {
722 assert(b->input_fd < 0);
723 assert(b->output_fd < 0);
724 assert(b->exec_path);
726 r = socketpair(AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, s);
738 reset_all_signal_handlers();
740 close_all_fds(s+1, 1);
742 assert_se(dup3(s[1], STDIN_FILENO, 0) == STDIN_FILENO);
743 assert_se(dup3(s[1], STDOUT_FILENO, 0) == STDOUT_FILENO);
745 if (s[1] != STDIN_FILENO && s[1] != STDOUT_FILENO)
746 close_nointr_nofail(s[1]);
748 fd_cloexec(STDIN_FILENO, false);
749 fd_cloexec(STDOUT_FILENO, false);
750 fd_nonblock(STDIN_FILENO, false);
751 fd_nonblock(STDOUT_FILENO, false);
754 execvp(b->exec_path, b->exec_argv);
756 const char *argv[] = { b->exec_path, NULL };
757 execvp(b->exec_path, (char**) argv);
763 close_nointr_nofail(s[1]);
764 b->output_fd = b->input_fd = s[0];
766 return bus_socket_start_auth(b);
769 int bus_socket_take_fd(sd_bus *b) {
773 r = bus_socket_setup(b);
777 return bus_socket_start_auth(b);
780 int bus_socket_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
790 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
792 if (*idx >= BUS_MESSAGE_SIZE(m))
795 r = bus_message_setup_iovec(m);
799 n = m->n_iovec * sizeof(struct iovec);
801 memcpy(iov, m->iovec, n);
804 iovec_advance(iov, &j, *idx);
806 if (bus->prefer_writev)
807 k = writev(bus->output_fd, iov, m->n_iovec);
813 struct cmsghdr *control;
814 control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
816 mh.msg_control = control;
817 control->cmsg_level = SOL_SOCKET;
818 control->cmsg_type = SCM_RIGHTS;
819 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
820 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
824 mh.msg_iovlen = m->n_iovec;
826 k = sendmsg(bus->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
827 if (k < 0 && errno == ENOTSOCK) {
828 bus->prefer_writev = true;
829 k = writev(bus->output_fd, iov, m->n_iovec);
834 return errno == EAGAIN ? 0 : -errno;
840 static int bus_socket_read_message_need(sd_bus *bus, size_t *need) {
847 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
849 if (bus->rbuffer_size < sizeof(struct bus_header)) {
850 *need = sizeof(struct bus_header) + 8;
852 /* Minimum message size:
856 * Method Call: +2 string headers
857 * Signal: +3 string headers
858 * Method Error: +1 string headers
860 * Method Reply: +1 uint32 headers
862 * A string header is at least 9 bytes
863 * A uint32 header is at least 8 bytes
865 * Hence the minimum message size of a valid message
866 * is header + 8 bytes */
871 a = ((const uint32_t*) bus->rbuffer)[1];
872 b = ((const uint32_t*) bus->rbuffer)[3];
874 e = ((const uint8_t*) bus->rbuffer)[0];
875 if (e == SD_BUS_LITTLE_ENDIAN) {
878 } else if (e == SD_BUS_BIG_ENDIAN) {
884 sum = (uint64_t) sizeof(struct bus_header) + (uint64_t) ALIGN_TO(b, 8) + (uint64_t) a;
885 if (sum >= BUS_MESSAGE_SIZE_MAX)
888 *need = (size_t) sum;
892 static int bus_socket_make_message(sd_bus *bus, size_t size, sd_bus_message **m) {
899 assert(bus->rbuffer_size >= size);
900 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
902 if (bus->rbuffer_size > size) {
903 b = memdup((const uint8_t*) bus->rbuffer + size,
904 bus->rbuffer_size - size);
910 r = bus_message_from_malloc(bus->rbuffer, size,
911 bus->fds, bus->n_fds,
912 bus->ucred_valid ? &bus->ucred : NULL,
913 bus->label[0] ? bus->label : NULL,
921 bus->rbuffer_size -= size;
930 int bus_socket_read_message(sd_bus *bus, sd_bus_message **m) {
938 struct cmsghdr cmsghdr;
939 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
940 CMSG_SPACE(sizeof(struct ucred)) +
941 CMSG_SPACE(NAME_MAX)]; /*selinux label */
943 struct cmsghdr *cmsg;
944 bool handle_cmsg = false;
948 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
950 r = bus_socket_read_message_need(bus, &need);
954 if (bus->rbuffer_size >= need)
955 return bus_socket_make_message(bus, need, m);
957 b = realloc(bus->rbuffer, need);
964 iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
965 iov.iov_len = need - bus->rbuffer_size;
967 if (bus->prefer_readv)
968 k = readv(bus->input_fd, &iov, 1);
973 mh.msg_control = &control;
974 mh.msg_controllen = sizeof(control);
976 k = recvmsg(bus->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
977 if (k < 0 && errno == ENOTSOCK) {
978 bus->prefer_readv = true;
979 k = readv(bus->input_fd, &iov, 1);
984 return errno == EAGAIN ? 0 : -errno;
988 bus->rbuffer_size += k;
991 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
992 if (cmsg->cmsg_level == SOL_SOCKET &&
993 cmsg->cmsg_type == SCM_RIGHTS) {
996 n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
999 /* Whut? We received fds but this
1000 * isn't actually enabled? Close them,
1003 close_many((int*) CMSG_DATA(cmsg), n);
1007 f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
1009 close_many((int*) CMSG_DATA(cmsg), n);
1013 memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
1016 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1017 cmsg->cmsg_type == SCM_CREDENTIALS &&
1018 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1020 /* Ignore bogus data, which we might
1021 * get on socketpair() sockets */
1022 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
1023 memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
1024 bus->ucred_valid = true;
1027 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1028 cmsg->cmsg_type == SCM_SECURITY) {
1031 l = cmsg->cmsg_len - CMSG_LEN(0);
1033 memcpy(&bus->label, CMSG_DATA(cmsg), l);
1040 r = bus_socket_read_message_need(bus, &need);
1044 if (bus->rbuffer_size >= need)
1045 return bus_socket_make_message(bus, need, m);
1050 int bus_socket_process_opening(sd_bus *b) {
1052 socklen_t slen = sizeof(error);
1059 assert(b->state == BUS_OPENING);
1065 if (!(p.revents & (POLLOUT|POLLERR|POLLHUP)))
1068 r = getsockopt(b->output_fd, SOL_SOCKET, SO_ERROR, &error, &slen);
1070 b->last_connect_error = errno;
1071 else if (error != 0)
1072 b->last_connect_error = error;
1073 else if (p.revents & (POLLERR|POLLHUP))
1074 b->last_connect_error = ECONNREFUSED;
1076 return bus_socket_start_auth(b);
1078 return bus_next_address(b);
1081 int bus_socket_process_authenticating(sd_bus *b) {
1085 assert(b->state == BUS_AUTHENTICATING);
1087 if (now(CLOCK_MONOTONIC) >= b->auth_timeout)
1090 r = bus_socket_write_auth(b);
1094 return bus_socket_read_auth(b);