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/>.
31 #include "sd-daemon.h"
32 #include "formats-util.h"
35 #include "bus-socket.h"
36 #include "bus-internal.h"
37 #include "bus-message.h"
39 #define SNDBUF_SIZE (8*1024*1024)
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_safe(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 == strlen("\r\nAGREE_UNIX_FD")) &&
229 memcmp(e + 2, "AGREE_UNIX_FD", strlen("AGREE_UNIX_FD")) == 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 xsprintf(t, "OK " SD_ID128_FORMAT_STR "\r\n", SD_ID128_FORMAT_VAL(b->server_id));
362 return bus_socket_auth_write(b, t);
365 static int bus_socket_auth_verify_server(sd_bus *b) {
369 bool processed = false;
374 if (b->rbuffer_size < 1)
377 /* First char must be a NUL byte */
378 if (*(char*) b->rbuffer != 0)
381 if (b->rbuffer_size < 3)
384 /* Begin with the first line */
385 if (b->auth_rbegin <= 0)
389 /* Check if line is complete */
390 line = (char*) b->rbuffer + b->auth_rbegin;
391 e = memmem(line, b->rbuffer_size - b->auth_rbegin, "\r\n", 2);
397 if (line_begins(line, l, "AUTH ANONYMOUS")) {
399 r = verify_anonymous_token(b, line + 14, l - 14);
403 r = bus_socket_auth_write(b, "REJECTED\r\n");
405 b->auth = BUS_AUTH_ANONYMOUS;
406 r = bus_socket_auth_write_ok(b);
409 } else if (line_begins(line, l, "AUTH EXTERNAL")) {
411 r = verify_external_token(b, line + 13, l - 13);
415 r = bus_socket_auth_write(b, "REJECTED\r\n");
417 b->auth = BUS_AUTH_EXTERNAL;
418 r = bus_socket_auth_write_ok(b);
421 } else if (line_begins(line, l, "AUTH"))
422 r = bus_socket_auth_write(b, "REJECTED EXTERNAL ANONYMOUS\r\n");
423 else if (line_equals(line, l, "CANCEL") ||
424 line_begins(line, l, "ERROR")) {
426 b->auth = _BUS_AUTH_INVALID;
427 r = bus_socket_auth_write(b, "REJECTED\r\n");
429 } else if (line_equals(line, l, "BEGIN")) {
431 if (b->auth == _BUS_AUTH_INVALID)
432 r = bus_socket_auth_write(b, "ERROR\r\n");
434 /* We can't leave from the auth phase
435 * before we haven't written
436 * everything queued, so let's check
439 if (bus_socket_auth_needs_write(b))
442 b->rbuffer_size -= (e + 2 - (char*) b->rbuffer);
443 memmove(b->rbuffer, e + 2, b->rbuffer_size);
444 return bus_start_running(b);
447 } else if (line_begins(line, l, "DATA")) {
449 if (b->auth == _BUS_AUTH_INVALID)
450 r = bus_socket_auth_write(b, "ERROR\r\n");
452 if (b->auth == BUS_AUTH_ANONYMOUS)
453 r = verify_anonymous_token(b, line + 4, l - 4);
455 r = verify_external_token(b, line + 4, l - 4);
460 b->auth = _BUS_AUTH_INVALID;
461 r = bus_socket_auth_write(b, "REJECTED\r\n");
463 r = bus_socket_auth_write_ok(b);
465 } else if (line_equals(line, l, "NEGOTIATE_UNIX_FD")) {
466 if (b->auth == _BUS_AUTH_INVALID || !(b->hello_flags & KDBUS_HELLO_ACCEPT_FD))
467 r = bus_socket_auth_write(b, "ERROR\r\n");
470 r = bus_socket_auth_write(b, "AGREE_UNIX_FD\r\n");
473 r = bus_socket_auth_write(b, "ERROR\r\n");
478 b->auth_rbegin = e + 2 - (char*) b->rbuffer;
484 static int bus_socket_auth_verify(sd_bus *b) {
488 return bus_socket_auth_verify_server(b);
490 return bus_socket_auth_verify_client(b);
493 static int bus_socket_read_auth(sd_bus *b) {
495 struct iovec iov = {};
501 struct cmsghdr cmsghdr;
502 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
503 CMSG_SPACE(sizeof(struct ucred)) +
504 CMSG_SPACE(NAME_MAX)]; /*selinux label */
506 struct cmsghdr *cmsg;
507 bool handle_cmsg = false;
510 assert(b->state == BUS_AUTHENTICATING);
512 r = bus_socket_auth_verify(b);
516 n = MAX(256u, b->rbuffer_size * 2);
518 if (n > BUS_AUTH_SIZE_MAX)
519 n = BUS_AUTH_SIZE_MAX;
521 if (b->rbuffer_size >= n)
524 p = realloc(b->rbuffer, n);
530 iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
531 iov.iov_len = n - b->rbuffer_size;
534 k = readv(b->input_fd, &iov, 1);
539 mh.msg_control = &control;
540 mh.msg_controllen = sizeof(control);
542 k = recvmsg(b->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
543 if (k < 0 && errno == ENOTSOCK) {
544 b->prefer_readv = true;
545 k = readv(b->input_fd, &iov, 1);
550 return errno == EAGAIN ? 0 : -errno;
554 b->rbuffer_size += k;
557 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
558 if (cmsg->cmsg_level == SOL_SOCKET &&
559 cmsg->cmsg_type == SCM_RIGHTS) {
562 /* Whut? We received fds during the auth
563 * protocol? Somebody is playing games with
564 * us. Close them all, and fail */
565 j = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
566 close_many((int*) CMSG_DATA(cmsg), j);
569 } else if (cmsg->cmsg_level == SOL_SOCKET &&
570 cmsg->cmsg_type == SCM_CREDENTIALS &&
571 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
573 /* Ignore bogus data, which we might
574 * get on socketpair() sockets */
575 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
576 memcpy(&b->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
577 b->ucred_valid = true;
580 } else if (cmsg->cmsg_level == SOL_SOCKET &&
581 cmsg->cmsg_type == SCM_SECURITY) {
585 l = cmsg->cmsg_len - CMSG_LEN(0);
587 memcpy(&b->label, CMSG_DATA(cmsg), l);
594 r = bus_socket_auth_verify(b);
601 void bus_socket_setup(sd_bus *b) {
606 /* Enable SO_PASSCRED + SO_PASSEC. We try this on any
607 * socket, just in case. */
608 enable = !b->bus_client;
609 (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable));
611 enable = !b->bus_client && (b->attach_flags & KDBUS_ATTACH_SECLABEL);
612 (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
614 /* Increase the buffers to 8 MB */
615 fd_inc_rcvbuf(b->input_fd, SNDBUF_SIZE);
616 fd_inc_sndbuf(b->output_fd, SNDBUF_SIZE);
618 b->is_kernel = false;
619 b->message_version = 1;
620 b->message_endian = 0;
623 static void bus_get_peercred(sd_bus *b) {
626 /* Get the peer for socketpair() sockets */
627 b->ucred_valid = getpeercred(b->input_fd, &b->ucred) >= 0;
630 static int bus_socket_start_auth_client(sd_bus *b) {
632 const char *auth_suffix, *auth_prefix;
636 if (b->anonymous_auth) {
637 auth_prefix = "\0AUTH ANONYMOUS ";
639 /* For ANONYMOUS auth we send some arbitrary "trace" string */
641 b->auth_buffer = hexmem("anonymous", l);
643 char text[DECIMAL_STR_MAX(uid_t) + 1];
645 auth_prefix = "\0AUTH EXTERNAL ";
647 xsprintf(text, UID_FMT, 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) {
676 b->state = BUS_AUTHENTICATING;
677 b->auth_timeout = now(CLOCK_MONOTONIC) + BUS_DEFAULT_TIMEOUT;
679 if (sd_is_socket(b->input_fd, AF_UNIX, 0, 0) <= 0)
680 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
682 if (b->output_fd != b->input_fd)
683 if (sd_is_socket(b->output_fd, AF_UNIX, 0, 0) <= 0)
684 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
687 return bus_socket_read_auth(b);
689 return bus_socket_start_auth_client(b);
692 int bus_socket_connect(sd_bus *b) {
696 assert(b->input_fd < 0);
697 assert(b->output_fd < 0);
698 assert(b->sockaddr.sa.sa_family != AF_UNSPEC);
700 b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
704 b->output_fd = b->input_fd;
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)
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);
766 b->output_fd = b->input_fd = s[0];
770 return bus_socket_start_auth(b);
773 int bus_socket_take_fd(sd_bus *b) {
778 return bus_socket_start_auth(b);
781 int bus_socket_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
791 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
793 if (*idx >= BUS_MESSAGE_SIZE(m))
796 r = bus_message_setup_iovec(m);
800 n = m->n_iovec * sizeof(struct iovec);
802 memcpy(iov, m->iovec, n);
805 iovec_advance(iov, &j, *idx);
807 if (bus->prefer_writev)
808 k = writev(bus->output_fd, iov, m->n_iovec);
812 .msg_iovlen = m->n_iovec,
816 struct cmsghdr *control;
818 mh.msg_control = control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
819 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
820 control->cmsg_level = SOL_SOCKET;
821 control->cmsg_type = SCM_RIGHTS;
822 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
825 k = sendmsg(bus->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
826 if (k < 0 && errno == ENOTSOCK) {
827 bus->prefer_writev = true;
828 k = writev(bus->output_fd, iov, m->n_iovec);
833 return errno == EAGAIN ? 0 : -errno;
839 static int bus_socket_read_message_need(sd_bus *bus, size_t *need) {
846 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
848 if (bus->rbuffer_size < sizeof(struct bus_header)) {
849 *need = sizeof(struct bus_header) + 8;
851 /* Minimum message size:
855 * Method Call: +2 string headers
856 * Signal: +3 string headers
857 * Method Error: +1 string headers
859 * Method Reply: +1 uint32 headers
861 * A string header is at least 9 bytes
862 * A uint32 header is at least 8 bytes
864 * Hence the minimum message size of a valid message
865 * is header + 8 bytes */
870 a = ((const uint32_t*) bus->rbuffer)[1];
871 b = ((const uint32_t*) bus->rbuffer)[3];
873 e = ((const uint8_t*) bus->rbuffer)[0];
874 if (e == BUS_LITTLE_ENDIAN) {
877 } else if (e == BUS_BIG_ENDIAN) {
883 sum = (uint64_t) sizeof(struct bus_header) + (uint64_t) ALIGN_TO(b, 8) + (uint64_t) a;
884 if (sum >= BUS_MESSAGE_SIZE_MAX)
887 *need = (size_t) sum;
891 static int bus_socket_make_message(sd_bus *bus, size_t size) {
897 assert(bus->rbuffer_size >= size);
898 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
900 r = bus_rqueue_make_room(bus);
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,
924 bus->rbuffer_size -= size;
929 bus->rqueue[bus->rqueue_size++] = t;
934 int bus_socket_read_message(sd_bus *bus) {
936 struct iovec iov = {};
942 struct cmsghdr cmsghdr;
943 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
944 CMSG_SPACE(sizeof(struct ucred)) +
945 CMSG_SPACE(NAME_MAX)]; /*selinux label */
947 struct cmsghdr *cmsg;
948 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);
960 b = realloc(bus->rbuffer, need);
966 iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
967 iov.iov_len = need - bus->rbuffer_size;
969 if (bus->prefer_readv)
970 k = readv(bus->input_fd, &iov, 1);
975 mh.msg_control = &control;
976 mh.msg_controllen = sizeof(control);
978 k = recvmsg(bus->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
979 if (k < 0 && errno == ENOTSOCK) {
980 bus->prefer_readv = true;
981 k = readv(bus->input_fd, &iov, 1);
986 return errno == EAGAIN ? 0 : -errno;
990 bus->rbuffer_size += k;
993 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
994 if (cmsg->cmsg_level == SOL_SOCKET &&
995 cmsg->cmsg_type == SCM_RIGHTS) {
998 n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
1000 if (!bus->can_fds) {
1001 /* Whut? We received fds but this
1002 * isn't actually enabled? Close them,
1005 close_many((int*) CMSG_DATA(cmsg), n);
1009 f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
1011 close_many((int*) CMSG_DATA(cmsg), n);
1015 memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
1018 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1019 cmsg->cmsg_type == SCM_CREDENTIALS &&
1020 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1022 /* Ignore bogus data, which we might
1023 * get on socketpair() sockets */
1024 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
1025 memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
1026 bus->ucred_valid = true;
1029 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1030 cmsg->cmsg_type == SCM_SECURITY) {
1033 l = cmsg->cmsg_len - CMSG_LEN(0);
1035 memcpy(&bus->label, CMSG_DATA(cmsg), l);
1042 r = bus_socket_read_message_need(bus, &need);
1046 if (bus->rbuffer_size >= need)
1047 return bus_socket_make_message(bus, need);
1052 int bus_socket_process_opening(sd_bus *b) {
1054 socklen_t slen = sizeof(error);
1061 assert(b->state == BUS_OPENING);
1067 if (!(p.revents & (POLLOUT|POLLERR|POLLHUP)))
1070 r = getsockopt(b->output_fd, SOL_SOCKET, SO_ERROR, &error, &slen);
1072 b->last_connect_error = errno;
1073 else if (error != 0)
1074 b->last_connect_error = error;
1075 else if (p.revents & (POLLERR|POLLHUP))
1076 b->last_connect_error = ECONNREFUSED;
1078 return bus_socket_start_auth(b);
1080 return bus_next_address(b);
1083 int bus_socket_process_authenticating(sd_bus *b) {
1087 assert(b->state == BUS_AUTHENTICATING);
1089 if (now(CLOCK_MONOTONIC) >= b->auth_timeout)
1092 r = bus_socket_write_auth(b);
1096 return bus_socket_read_auth(b);