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 #define SNDBUF_SIZE (8*1024*1024)
43 static void iovec_advance(struct iovec iov[], unsigned *idx, size_t size) {
46 struct iovec *i = iov + *idx;
48 if (i->iov_len > size) {
49 i->iov_base = (uint8_t*) i->iov_base + size;
63 static int append_iovec(sd_bus_message *m, const void *p, size_t sz) {
68 m->iovec[m->n_iovec].iov_base = (void*) p;
69 m->iovec[m->n_iovec].iov_len = sz;
75 static int bus_message_setup_iovec(sd_bus_message *m) {
76 struct bus_body_part *part;
88 n = 1 + m->n_body_parts;
89 if (n < ELEMENTSOF(m->iovec_fixed))
90 m->iovec = m->iovec_fixed;
92 m->iovec = new(struct iovec, n);
99 r = append_iovec(m, m->header, BUS_MESSAGE_BODY_BEGIN(m));
103 MESSAGE_FOREACH_PART(part, i, m) {
104 r = bus_body_part_map(part);
108 r = append_iovec(m, part->data, part->size);
113 assert(n == m->n_iovec);
122 bool bus_socket_auth_needs_write(sd_bus *b) {
126 if (b->auth_index >= ELEMENTSOF(b->auth_iovec))
129 for (i = b->auth_index; i < ELEMENTSOF(b->auth_iovec); i++) {
130 struct iovec *j = b->auth_iovec + i;
139 static int bus_socket_write_auth(sd_bus *b) {
143 assert(b->state == BUS_AUTHENTICATING);
145 if (!bus_socket_auth_needs_write(b))
148 if (b->prefer_writev)
149 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
154 mh.msg_iov = b->auth_iovec + b->auth_index;
155 mh.msg_iovlen = ELEMENTSOF(b->auth_iovec) - b->auth_index;
157 k = sendmsg(b->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
158 if (k < 0 && errno == ENOTSOCK) {
159 b->prefer_writev = true;
160 k = writev(b->output_fd, b->auth_iovec + b->auth_index, ELEMENTSOF(b->auth_iovec) - b->auth_index);
165 return errno == EAGAIN ? 0 : -errno;
167 iovec_advance(b->auth_iovec, &b->auth_index, (size_t) k);
171 static int bus_socket_auth_verify_client(sd_bus *b) {
179 /* We expect two response lines: "OK" and possibly
182 e = memmem(b->rbuffer, b->rbuffer_size, "\r\n", 2);
186 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD) {
187 f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
197 /* Nice! We got all the lines we need. First check the OK
200 if (e - (char*) b->rbuffer != 3 + 32)
203 if (memcmp(b->rbuffer, "OK ", 3))
206 b->auth = b->anonymous_auth ? BUS_AUTH_ANONYMOUS : BUS_AUTH_EXTERNAL;
208 for (i = 0; i < 32; i += 2) {
211 x = unhexchar(((char*) b->rbuffer)[3 + i]);
212 y = unhexchar(((char*) b->rbuffer)[3 + i + 1]);
217 peer.bytes[i/2] = ((uint8_t) x << 4 | (uint8_t) y);
220 if (!sd_id128_equal(b->server_id, SD_ID128_NULL) &&
221 !sd_id128_equal(b->server_id, peer))
226 /* And possibly check the second line, too */
230 (f - e == sizeof("\r\nAGREE_UNIX_FD") - 1) &&
231 memcmp(e + 2, "AGREE_UNIX_FD", sizeof("AGREE_UNIX_FD") - 1) == 0;
233 b->rbuffer_size -= (start - (char*) b->rbuffer);
234 memmove(b->rbuffer, start, b->rbuffer_size);
236 r = bus_start_running(b);
243 static bool line_equals(const char *s, size_t m, const char *line) {
250 return memcmp(s, line, l) == 0;
253 static bool line_begins(const char *s, size_t m, const char *word) {
260 if (memcmp(s, word, l) != 0)
263 return m == l || (m > l && s[l] == ' ');
266 static int verify_anonymous_token(sd_bus *b, const char *p, size_t l) {
267 _cleanup_free_ char *token = NULL;
269 if (!b->anonymous_auth)
280 token = unhexmem(p, l);
284 if (memchr(token, 0, l/2))
287 return !!utf8_is_valid(token);
290 static int verify_external_token(sd_bus *b, const char *p, size_t l) {
291 _cleanup_free_ char *token = NULL;
295 /* We don't do any real authentication here. Instead, we if
296 * the owner of this bus wanted authentication he should have
297 * checked SO_PEERCRED before even creating the bus object. */
299 if (!b->anonymous_auth && !b->ucred_valid)
311 token = unhexmem(p, l);
315 if (memchr(token, 0, l/2))
318 r = parse_uid(token, &u);
322 /* We ignore the passed value if anonymous authentication is
324 if (!b->anonymous_auth && u != b->ucred.uid)
330 static int bus_socket_auth_write(sd_bus *b, const char *t) {
337 /* We only make use of the first iovec */
338 assert(b->auth_index == 0 || b->auth_index == 1);
341 p = malloc(b->auth_iovec[0].iov_len + l);
345 memcpy(p, b->auth_iovec[0].iov_base, b->auth_iovec[0].iov_len);
346 memcpy(p + b->auth_iovec[0].iov_len, t, l);
348 b->auth_iovec[0].iov_base = p;
349 b->auth_iovec[0].iov_len += l;
351 free(b->auth_buffer);
357 static int bus_socket_auth_write_ok(sd_bus *b) {
358 char t[3 + 32 + 2 + 1];
362 snprintf(t, sizeof(t), "OK " SD_ID128_FORMAT_STR "\r\n", SD_ID128_FORMAT_VAL(b->server_id));
365 return bus_socket_auth_write(b, t);
368 static int bus_socket_auth_verify_server(sd_bus *b) {
372 bool processed = false;
377 if (b->rbuffer_size < 1)
380 /* First char must be a NUL byte */
381 if (*(char*) b->rbuffer != 0)
384 if (b->rbuffer_size < 3)
387 /* Begin with the first line */
388 if (b->auth_rbegin <= 0)
392 /* Check if line is complete */
393 line = (char*) b->rbuffer + b->auth_rbegin;
394 e = memmem(line, b->rbuffer_size - b->auth_rbegin, "\r\n", 2);
400 if (line_begins(line, l, "AUTH ANONYMOUS")) {
402 r = verify_anonymous_token(b, line + 14, l - 14);
406 r = bus_socket_auth_write(b, "REJECTED\r\n");
408 b->auth = BUS_AUTH_ANONYMOUS;
409 r = bus_socket_auth_write_ok(b);
412 } else if (line_begins(line, l, "AUTH EXTERNAL")) {
414 r = verify_external_token(b, line + 13, l - 13);
418 r = bus_socket_auth_write(b, "REJECTED\r\n");
420 b->auth = BUS_AUTH_EXTERNAL;
421 r = bus_socket_auth_write_ok(b);
424 } else if (line_begins(line, l, "AUTH"))
425 r = bus_socket_auth_write(b, "REJECTED EXTERNAL ANONYMOUS\r\n");
426 else if (line_equals(line, l, "CANCEL") ||
427 line_begins(line, l, "ERROR")) {
429 b->auth = _BUS_AUTH_INVALID;
430 r = bus_socket_auth_write(b, "REJECTED\r\n");
432 } else if (line_equals(line, l, "BEGIN")) {
434 if (b->auth == _BUS_AUTH_INVALID)
435 r = bus_socket_auth_write(b, "ERROR\r\n");
437 /* We can't leave from the auth phase
438 * before we haven't written
439 * everything queued, so let's check
442 if (bus_socket_auth_needs_write(b))
445 b->rbuffer_size -= (e + 2 - (char*) b->rbuffer);
446 memmove(b->rbuffer, e + 2, b->rbuffer_size);
447 return bus_start_running(b);
450 } else if (line_begins(line, l, "DATA")) {
452 if (b->auth == _BUS_AUTH_INVALID)
453 r = bus_socket_auth_write(b, "ERROR\r\n");
455 if (b->auth == BUS_AUTH_ANONYMOUS)
456 r = verify_anonymous_token(b, line + 4, l - 4);
458 r = verify_external_token(b, line + 4, l - 4);
463 b->auth = _BUS_AUTH_INVALID;
464 r = bus_socket_auth_write(b, "REJECTED\r\n");
466 r = bus_socket_auth_write_ok(b);
468 } else if (line_equals(line, l, "NEGOTIATE_UNIX_FD")) {
469 if (b->auth == _BUS_AUTH_INVALID || !(b->hello_flags & KDBUS_HELLO_ACCEPT_FD))
470 r = bus_socket_auth_write(b, "ERROR\r\n");
473 r = bus_socket_auth_write(b, "AGREE_UNIX_FD\r\n");
476 r = bus_socket_auth_write(b, "ERROR\r\n");
481 b->auth_rbegin = e + 2 - (char*) b->rbuffer;
487 static int bus_socket_auth_verify(sd_bus *b) {
491 return bus_socket_auth_verify_server(b);
493 return bus_socket_auth_verify_client(b);
496 static int bus_socket_read_auth(sd_bus *b) {
504 struct cmsghdr cmsghdr;
505 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
506 CMSG_SPACE(sizeof(struct ucred)) +
507 CMSG_SPACE(NAME_MAX)]; /*selinux label */
509 struct cmsghdr *cmsg;
510 bool handle_cmsg = false;
513 assert(b->state == BUS_AUTHENTICATING);
515 r = bus_socket_auth_verify(b);
519 n = MAX(256u, b->rbuffer_size * 2);
521 if (n > BUS_AUTH_SIZE_MAX)
522 n = BUS_AUTH_SIZE_MAX;
524 if (b->rbuffer_size >= n)
527 p = realloc(b->rbuffer, n);
534 iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
535 iov.iov_len = n - b->rbuffer_size;
538 k = readv(b->input_fd, &iov, 1);
543 mh.msg_control = &control;
544 mh.msg_controllen = sizeof(control);
546 k = recvmsg(b->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
547 if (k < 0 && errno == ENOTSOCK) {
548 b->prefer_readv = true;
549 k = readv(b->input_fd, &iov, 1);
554 return errno == EAGAIN ? 0 : -errno;
558 b->rbuffer_size += k;
561 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
562 if (cmsg->cmsg_level == SOL_SOCKET &&
563 cmsg->cmsg_type == SCM_RIGHTS) {
566 /* Whut? We received fds during the auth
567 * protocol? Somebody is playing games with
568 * us. Close them all, and fail */
569 j = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
570 close_many((int*) CMSG_DATA(cmsg), j);
573 } else if (cmsg->cmsg_level == SOL_SOCKET &&
574 cmsg->cmsg_type == SCM_CREDENTIALS &&
575 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
577 /* Ignore bogus data, which we might
578 * get on socketpair() sockets */
579 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
580 memcpy(&b->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
581 b->ucred_valid = true;
584 } else if (cmsg->cmsg_level == SOL_SOCKET &&
585 cmsg->cmsg_type == SCM_SECURITY) {
589 l = cmsg->cmsg_len - CMSG_LEN(0);
591 memcpy(&b->label, CMSG_DATA(cmsg), l);
598 r = bus_socket_auth_verify(b);
605 void bus_socket_setup(sd_bus *b) {
610 /* Enable SO_PASSCRED + SO_PASSEC. We try this on any
611 * socket, just in case. */
612 enable = !b->bus_client;
613 setsockopt(b->input_fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable));
615 enable = !b->bus_client && (b->attach_flags & KDBUS_ATTACH_SECLABEL);
616 setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
618 /* Increase the buffers to 8 MB */
619 fd_inc_rcvbuf(b->input_fd, SNDBUF_SIZE);
620 fd_inc_sndbuf(b->output_fd, SNDBUF_SIZE);
622 b->is_kernel = false;
623 b->message_version = 1;
624 b->message_endian = 0;
627 static void bus_get_peercred(sd_bus *b) {
632 /* Get the peer for socketpair() sockets */
633 l = sizeof(b->ucred);
634 if (getsockopt(b->input_fd, SOL_SOCKET, SO_PEERCRED, &b->ucred, &l) >= 0 && l >= sizeof(b->ucred))
635 b->ucred_valid = b->ucred.pid > 0;
638 static int bus_socket_start_auth_client(sd_bus *b) {
640 const char *auth_suffix, *auth_prefix;
644 if (b->anonymous_auth) {
645 auth_prefix = "\0AUTH ANONYMOUS ";
647 /* For ANONYMOUS auth we send some arbitrary "trace" string */
649 b->auth_buffer = hexmem("anonymous", l);
651 char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
653 auth_prefix = "\0AUTH EXTERNAL ";
655 snprintf(text, sizeof(text), "%lu", (unsigned long) geteuid());
659 b->auth_buffer = hexmem(text, l);
665 if (b->hello_flags & KDBUS_HELLO_ACCEPT_FD)
666 auth_suffix = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
668 auth_suffix = "\r\nBEGIN\r\n";
670 b->auth_iovec[0].iov_base = (void*) auth_prefix;
671 b->auth_iovec[0].iov_len = 1 + strlen(auth_prefix + 1);
672 b->auth_iovec[1].iov_base = (void*) b->auth_buffer;
673 b->auth_iovec[1].iov_len = l * 2;
674 b->auth_iovec[2].iov_base = (void*) auth_suffix;
675 b->auth_iovec[2].iov_len = strlen(auth_suffix);
677 return bus_socket_write_auth(b);
680 int bus_socket_start_auth(sd_bus *b) {
685 b->state = BUS_AUTHENTICATING;
686 b->auth_timeout = now(CLOCK_MONOTONIC) + BUS_DEFAULT_TIMEOUT;
688 if (sd_is_socket(b->input_fd, AF_UNIX, 0, 0) <= 0)
689 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
691 if (b->output_fd != b->input_fd)
692 if (sd_is_socket(b->output_fd, AF_UNIX, 0, 0) <= 0)
693 b->hello_flags &= ~KDBUS_HELLO_ACCEPT_FD;
696 return bus_socket_read_auth(b);
698 return bus_socket_start_auth_client(b);
701 int bus_socket_connect(sd_bus *b) {
705 assert(b->input_fd < 0);
706 assert(b->output_fd < 0);
707 assert(b->sockaddr.sa.sa_family != AF_UNSPEC);
709 b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
713 b->output_fd = b->input_fd;
717 r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
719 if (errno == EINPROGRESS)
725 return bus_socket_start_auth(b);
728 int bus_socket_exec(sd_bus *b) {
733 assert(b->input_fd < 0);
734 assert(b->output_fd < 0);
735 assert(b->exec_path);
737 r = socketpair(AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, s);
749 reset_all_signal_handlers();
751 close_all_fds(s+1, 1);
753 assert_se(dup3(s[1], STDIN_FILENO, 0) == STDIN_FILENO);
754 assert_se(dup3(s[1], STDOUT_FILENO, 0) == STDOUT_FILENO);
756 if (s[1] != STDIN_FILENO && s[1] != STDOUT_FILENO)
757 close_nointr_nofail(s[1]);
759 fd_cloexec(STDIN_FILENO, false);
760 fd_cloexec(STDOUT_FILENO, false);
761 fd_nonblock(STDIN_FILENO, false);
762 fd_nonblock(STDOUT_FILENO, false);
765 execvp(b->exec_path, b->exec_argv);
767 const char *argv[] = { b->exec_path, NULL };
768 execvp(b->exec_path, (char**) argv);
774 close_nointr_nofail(s[1]);
775 b->output_fd = b->input_fd = s[0];
779 return bus_socket_start_auth(b);
782 int bus_socket_take_fd(sd_bus *b) {
787 return bus_socket_start_auth(b);
790 int bus_socket_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
800 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
802 if (*idx >= BUS_MESSAGE_SIZE(m))
805 r = bus_message_setup_iovec(m);
809 n = m->n_iovec * sizeof(struct iovec);
811 memcpy(iov, m->iovec, n);
814 iovec_advance(iov, &j, *idx);
816 if (bus->prefer_writev)
817 k = writev(bus->output_fd, iov, m->n_iovec);
823 struct cmsghdr *control;
824 control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
826 mh.msg_control = control;
827 control->cmsg_level = SOL_SOCKET;
828 control->cmsg_type = SCM_RIGHTS;
829 mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
830 memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
834 mh.msg_iovlen = m->n_iovec;
836 k = sendmsg(bus->output_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
837 if (k < 0 && errno == ENOTSOCK) {
838 bus->prefer_writev = true;
839 k = writev(bus->output_fd, iov, m->n_iovec);
844 return errno == EAGAIN ? 0 : -errno;
850 static int bus_socket_read_message_need(sd_bus *bus, size_t *need) {
857 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
859 if (bus->rbuffer_size < sizeof(struct bus_header)) {
860 *need = sizeof(struct bus_header) + 8;
862 /* Minimum message size:
866 * Method Call: +2 string headers
867 * Signal: +3 string headers
868 * Method Error: +1 string headers
870 * Method Reply: +1 uint32 headers
872 * A string header is at least 9 bytes
873 * A uint32 header is at least 8 bytes
875 * Hence the minimum message size of a valid message
876 * is header + 8 bytes */
881 a = ((const uint32_t*) bus->rbuffer)[1];
882 b = ((const uint32_t*) bus->rbuffer)[3];
884 e = ((const uint8_t*) bus->rbuffer)[0];
885 if (e == BUS_LITTLE_ENDIAN) {
888 } else if (e == BUS_BIG_ENDIAN) {
894 sum = (uint64_t) sizeof(struct bus_header) + (uint64_t) ALIGN_TO(b, 8) + (uint64_t) a;
895 if (sum >= BUS_MESSAGE_SIZE_MAX)
898 *need = (size_t) sum;
902 static int bus_socket_make_message(sd_bus *bus, size_t size) {
908 assert(bus->rbuffer_size >= size);
909 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
911 r = bus_rqueue_make_room(bus);
915 if (bus->rbuffer_size > size) {
916 b = memdup((const uint8_t*) bus->rbuffer + size,
917 bus->rbuffer_size - size);
923 r = bus_message_from_malloc(bus,
925 bus->fds, bus->n_fds,
926 !bus->bus_client && bus->ucred_valid ? &bus->ucred : NULL,
927 !bus->bus_client && bus->label[0] ? bus->label : NULL,
935 bus->rbuffer_size -= size;
940 bus->rqueue[bus->rqueue_size++] = t;
945 int bus_socket_read_message(sd_bus *bus) {
953 struct cmsghdr cmsghdr;
954 uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
955 CMSG_SPACE(sizeof(struct ucred)) +
956 CMSG_SPACE(NAME_MAX)]; /*selinux label */
958 struct cmsghdr *cmsg;
959 bool handle_cmsg = false;
962 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
964 r = bus_socket_read_message_need(bus, &need);
968 if (bus->rbuffer_size >= need)
969 return bus_socket_make_message(bus, need);
971 b = realloc(bus->rbuffer, need);
978 iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
979 iov.iov_len = need - bus->rbuffer_size;
981 if (bus->prefer_readv)
982 k = readv(bus->input_fd, &iov, 1);
987 mh.msg_control = &control;
988 mh.msg_controllen = sizeof(control);
990 k = recvmsg(bus->input_fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
991 if (k < 0 && errno == ENOTSOCK) {
992 bus->prefer_readv = true;
993 k = readv(bus->input_fd, &iov, 1);
998 return errno == EAGAIN ? 0 : -errno;
1002 bus->rbuffer_size += k;
1005 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
1006 if (cmsg->cmsg_level == SOL_SOCKET &&
1007 cmsg->cmsg_type == SCM_RIGHTS) {
1010 n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
1012 if (!bus->can_fds) {
1013 /* Whut? We received fds but this
1014 * isn't actually enabled? Close them,
1017 close_many((int*) CMSG_DATA(cmsg), n);
1021 f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
1023 close_many((int*) CMSG_DATA(cmsg), n);
1027 memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
1030 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1031 cmsg->cmsg_type == SCM_CREDENTIALS &&
1032 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1034 /* Ignore bogus data, which we might
1035 * get on socketpair() sockets */
1036 if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
1037 memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
1038 bus->ucred_valid = true;
1041 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1042 cmsg->cmsg_type == SCM_SECURITY) {
1045 l = cmsg->cmsg_len - CMSG_LEN(0);
1047 memcpy(&bus->label, CMSG_DATA(cmsg), l);
1054 r = bus_socket_read_message_need(bus, &need);
1058 if (bus->rbuffer_size >= need)
1059 return bus_socket_make_message(bus, need);
1064 int bus_socket_process_opening(sd_bus *b) {
1066 socklen_t slen = sizeof(error);
1073 assert(b->state == BUS_OPENING);
1079 if (!(p.revents & (POLLOUT|POLLERR|POLLHUP)))
1082 r = getsockopt(b->output_fd, SOL_SOCKET, SO_ERROR, &error, &slen);
1084 b->last_connect_error = errno;
1085 else if (error != 0)
1086 b->last_connect_error = error;
1087 else if (p.revents & (POLLERR|POLLHUP))
1088 b->last_connect_error = ECONNREFUSED;
1090 return bus_socket_start_auth(b);
1092 return bus_next_address(b);
1095 int bus_socket_process_authenticating(sd_bus *b) {
1099 assert(b->state == BUS_AUTHENTICATING);
1101 if (now(CLOCK_MONOTONIC) >= b->auth_timeout)
1104 r = bus_socket_write_auth(b);
1108 return bus_socket_read_auth(b);