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/>.
27 #include "sd-daemon.h"
32 #include "formats-util.h"
33 #include "signal-util.h"
36 #include "bus-socket.h"
37 #include "bus-internal.h"
38 #include "bus-message.h"
40 #define SNDBUF_SIZE (8*1024*1024)
42 static void iovec_advance(struct iovec iov[], unsigned *idx, size_t size) {
45 struct iovec *i = iov + *idx;
47 if (i->iov_len > size) {
48 i->iov_base = (uint8_t*) i->iov_base + size;
62 static int append_iovec(sd_bus_message *m, const void *p, size_t sz) {
67 m->iovec[m->n_iovec].iov_base = (void*) p;
68 m->iovec[m->n_iovec].iov_len = sz;
74 static int bus_message_setup_iovec(sd_bus_message *m) {
75 struct bus_body_part *part;
87 n = 1 + m->n_body_parts;
88 if (n < ELEMENTSOF(m->iovec_fixed))
89 m->iovec = m->iovec_fixed;
91 m->iovec = new(struct iovec, n);
98 r = append_iovec(m, m->header, BUS_MESSAGE_BODY_BEGIN(m));
102 MESSAGE_FOREACH_PART(part, i, m) {
103 r = bus_body_part_map(part);
107 r = append_iovec(m, part->data, part->size);
112 assert(n == m->n_iovec);
121 bool bus_socket_auth_needs_write(sd_bus *b) {
125 if (b->auth_index >= ELEMENTSOF(b->auth_iovec))
128 for (i = b->auth_index; i < ELEMENTSOF(b->auth_iovec); i++) {
129 struct iovec *j = b->auth_iovec + i;
138 static int bus_socket_write_auth(sd_bus *b) {
142 assert(b->state == BUS_AUTHENTICATING);
144 if (!bus_socket_auth_needs_write(b))
147 if (b->prefer_writev)
148 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
153 mh.msg_iov = b->auth_iovec + b->auth_index;
154 mh.msg_iovlen = ELEMENTSOF(b->auth_iovec) - b->auth_index;
156 k = sendmsg(b->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
157 if (k < 0 && errno == ENOTSOCK) {
158 b->prefer_writev = true;
159 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
164 return errno == EAGAIN ? 0 : -errno;
166 iovec_advance(b->auth_iovec, &b->auth_index, (size_t) k);
170 static int bus_socket_auth_verify_client(sd_bus *b) {
178 /* We expect two response lines: "OK" and possibly
181 e = memmem_safe(b->rbuffer, b->rbuffer_size, "\r\n", 2);
185 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD) {
186 f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
196 /* Nice! We got all the lines we need. First check the OK
199 if (e - (char*) b->rbuffer != 3 + 32)
202 if (memcmp(b->rbuffer, "OK ", 3))
205 b->auth = b->anonymous_auth ? BUS_AUTH_ANONYMOUS : BUS_AUTH_EXTERNAL;
207 for (i = 0; i < 32; i += 2) {
210 x = unhexchar(((char*) b->rbuffer)[3 + i]);
211 y = unhexchar(((char*) b->rbuffer)[3 + i + 1]);
216 peer.bytes[i/2] = ((uint8_t) x << 4 | (uint8_t) y);
219 if (!sd_id128_equal(b->server_id, SD_ID128_NULL) &&
220 !sd_id128_equal(b->server_id, peer))
225 /* And possibly check the second line, too */
229 (f - e == strlen("\r\nAGREE_UNIX_FD")) &&
230 memcmp(e + 2, "AGREE_UNIX_FD", strlen("AGREE_UNIX_FD")) == 0;
232 b->rbuffer_size -= (start - (char*) b->rbuffer);
233 memmove(b->rbuffer, start, b->rbuffer_size);
235 r = bus_start_running(b);
242 static bool line_equals(const char *s, size_t m, const char *line) {
249 return memcmp(s, line, l) == 0;
252 static bool line_begins(const char *s, size_t m, const char *word) {
259 if (memcmp(s, word, l) != 0)
262 return m == l || (m > l && s[l] == ' ');
265 static int verify_anonymous_token(sd_bus *b, const char *p, size_t l) {
266 _cleanup_free_ char *token = NULL;
268 if (!b->anonymous_auth)
279 token = unhexmem(p, l);
283 if (memchr(token, 0, l/2))
286 return !!utf8_is_valid(token);
289 static int verify_external_token(sd_bus *b, const char *p, size_t l) {
290 _cleanup_free_ char *token = NULL;
294 /* We don't do any real authentication here. Instead, we if
295 * the owner of this bus wanted authentication he should have
296 * checked SO_PEERCRED before even creating the bus object. */
298 if (!b->anonymous_auth && !b->ucred_valid)
310 token = unhexmem(p, l);
314 if (memchr(token, 0, l/2))
317 r = parse_uid(token, &u);
321 /* We ignore the passed value if anonymous authentication is
323 if (!b->anonymous_auth && u != b->ucred.uid)
329 static int bus_socket_auth_write(sd_bus *b, const char *t) {
336 /* We only make use of the first iovec */
337 assert(b->auth_index == 0 || b->auth_index == 1);
340 p = malloc(b->auth_iovec[0].iov_len + l);
344 memcpy(p, b->auth_iovec[0].iov_base, b->auth_iovec[0].iov_len);
345 memcpy(p + b->auth_iovec[0].iov_len, t, l);
347 b->auth_iovec[0].iov_base = p;
348 b->auth_iovec[0].iov_len += l;
350 free(b->auth_buffer);
356 static int bus_socket_auth_write_ok(sd_bus *b) {
357 char t[3 + 32 + 2 + 1];
361 xsprintf(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) {
496 struct iovec iov = {};
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);
531 iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
532 iov.iov_len = n - b->rbuffer_size;
535 k = readv(b->input_fd, &iov, 1);
540 mh.msg_control = &control;
541 mh.msg_controllen = sizeof(control);
543 k = recvmsg(b->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
544 if (k < 0 && errno == ENOTSOCK) {
545 b->prefer_readv = true;
546 k = readv(b->input_fd, &iov, 1);
551 return errno == EAGAIN ? 0 : -errno;
555 b->rbuffer_size += k;
558 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
559 if (cmsg->cmsg_level == SOL_SOCKET &&
560 cmsg->cmsg_type == SCM_RIGHTS) {
563 /* Whut? We received fds during the auth
564 * protocol? Somebody is playing games with
565 * us. Close them all, and fail */
566 j = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
567 close_many((int*) CMSG_DATA(cmsg), j);
570 } else if (cmsg->cmsg_level == SOL_SOCKET &&
571 cmsg->cmsg_type == SCM_CREDENTIALS &&
572 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
574 /* Ignore bogus data, which we might
575 * get on socketpair() sockets */
576 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
577 memcpy(&b->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
578 b->ucred_valid = true;
581 } else if (cmsg->cmsg_level == SOL_SOCKET &&
582 cmsg->cmsg_type == SCM_SECURITY) {
586 l = cmsg->cmsg_len - CMSG_LEN(0);
588 memcpy(&b->label, CMSG_DATA(cmsg), l);
595 r = bus_socket_auth_verify(b);
602 void bus_socket_setup(sd_bus *b) {
607 /* Enable SO_PASSCRED + SO_PASSEC. We try this on any
608 * socket, just in case. */
609 enable = !b->bus_client;
610 (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable));
612 enable = !b->bus_client && (b->attach_flags & KDBUS_ATTACH_SECLABEL);
613 (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
615 /* Increase the buffers to 8 MB */
616 fd_inc_rcvbuf(b->input_fd, SNDBUF_SIZE);
617 fd_inc_sndbuf(b->output_fd, SNDBUF_SIZE);
619 b->is_kernel = false;
620 b->message_version = 1;
621 b->message_endian = 0;
624 static void bus_get_peercred(sd_bus *b) {
627 /* Get the peer for socketpair() sockets */
628 b->ucred_valid = getpeercred(b->input_fd, &b->ucred) >= 0;
631 static int bus_socket_start_auth_client(sd_bus *b) {
633 const char *auth_suffix, *auth_prefix;
637 if (b->anonymous_auth) {
638 auth_prefix = "\0AUTH ANONYMOUS ";
640 /* For ANONYMOUS auth we send some arbitrary "trace" string */
642 b->auth_buffer = hexmem("anonymous", l);
644 char text[DECIMAL_STR_MAX(uid_t) + 1];
646 auth_prefix = "\0AUTH EXTERNAL ";
648 xsprintf(text, UID_FMT, geteuid());
651 b->auth_buffer = hexmem(text, l);
657 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD)
658 auth_suffix = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
660 auth_suffix = "\r\nBEGIN\r\n";
662 b->auth_iovec[0].iov_base = (void*) auth_prefix;
663 b->auth_iovec[0].iov_len = 1 + strlen(auth_prefix + 1);
664 b->auth_iovec[1].iov_base = (void*) b->auth_buffer;
665 b->auth_iovec[1].iov_len = l * 2;
666 b->auth_iovec[2].iov_base = (void*) auth_suffix;
667 b->auth_iovec[2].iov_len = strlen(auth_suffix);
669 return bus_socket_write_auth(b);
672 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;
709 r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
711 if (errno == EINPROGRESS)
717 return bus_socket_start_auth(b);
720 int bus_socket_exec(sd_bus *b) {
725 assert(b->input_fd < 0);
726 assert(b->output_fd < 0);
727 assert(b->exec_path);
729 r = socketpair(AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, s);
741 reset_all_signal_handlers();
743 close_all_fds(s+1, 1);
745 assert_se(dup3(s[1], STDIN_FILENO, 0) == STDIN_FILENO);
746 assert_se(dup3(s[1], STDOUT_FILENO, 0) == STDOUT_FILENO);
748 if (s[1] != STDIN_FILENO && s[1] != STDOUT_FILENO)
751 fd_cloexec(STDIN_FILENO, false);
752 fd_cloexec(STDOUT_FILENO, false);
753 fd_nonblock(STDIN_FILENO, false);
754 fd_nonblock(STDOUT_FILENO, false);
757 execvp(b->exec_path, b->exec_argv);
759 const char *argv[] = { b->exec_path, NULL };
760 execvp(b->exec_path, (char**) argv);
767 b->output_fd = b->input_fd = s[0];
771 return bus_socket_start_auth(b);
774 int bus_socket_take_fd(sd_bus *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);
813 .msg_iovlen = m->n_iovec,
817 struct cmsghdr *control;
819 mh.msg_control = control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
820 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
821 control->cmsg_level = SOL_SOCKET;
822 control->cmsg_type = SCM_RIGHTS;
823 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
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 == BUS_LITTLE_ENDIAN) {
878 } else if (e == 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) {
898 assert(bus->rbuffer_size >= size);
899 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
901 r = bus_rqueue_make_room(bus);
905 if (bus->rbuffer_size > size) {
906 b = memdup((const uint8_t*) bus->rbuffer + size,
907 bus->rbuffer_size - size);
913 r = bus_message_from_malloc(bus,
915 bus->fds, bus->n_fds,
925 bus->rbuffer_size -= size;
930 bus->rqueue[bus->rqueue_size++] = t;
935 int bus_socket_read_message(sd_bus *bus) {
937 struct iovec iov = {};
943 struct cmsghdr cmsghdr;
944 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
945 CMSG_SPACE(sizeof(struct ucred)) +
946 CMSG_SPACE(NAME_MAX)]; /*selinux label */
948 struct cmsghdr *cmsg;
949 bool handle_cmsg = false;
952 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
954 r = bus_socket_read_message_need(bus, &need);
958 if (bus->rbuffer_size >= need)
959 return bus_socket_make_message(bus, need);
961 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);
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);