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/>.
29 #include "time-util.h"
30 #include "cgroup-util.h"
33 #include "bus-message.h"
34 #include "bus-internal.h"
36 #include "bus-signature.h"
37 #include "bus-gvariant.h"
39 static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
41 static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) {
46 if (old_base == new_base)
49 if ((uint8_t*) p < (uint8_t*) old_base)
52 if ((uint8_t*) p >= (uint8_t*) old_base + sz)
55 return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base);
58 static void message_free_part(sd_bus_message *m, struct bus_body_part *part) {
62 if (part->memfd >= 0) {
63 /* If we can reuse the memfd, try that. For that it
64 * can't be sealed yet. */
67 bus_kernel_push_memfd(m->bus, part->memfd, part->data, part->mapped);
70 assert_se(munmap(part->data, part->mapped) == 0);
72 close_nointr_nofail(part->memfd);
75 } else if (part->munmap_this)
76 munmap(part->data, part->mapped);
77 else if (part->free_this)
84 static void message_reset_parts(sd_bus_message *m) {
85 struct bus_body_part *part;
90 while (m->n_body_parts > 0) {
91 struct bus_body_part *next = part->next;
92 message_free_part(m, part);
99 m->cached_rindex_part = NULL;
100 m->cached_rindex_part_begin = 0;
103 static void message_reset_containers(sd_bus_message *m) {
108 for (i = 0; i < m->n_containers; i++) {
109 free(m->containers[i].signature);
110 free(m->containers[i].offsets);
114 m->containers = NULL;
117 m->root_container.index = 0;
120 static void message_free(sd_bus_message *m) {
126 message_reset_parts(m);
131 if (m->release_kdbus) {
134 off = (uint8_t *)m->kdbus - (uint8_t *)m->bus->kdbus_buffer;
135 ioctl(m->bus->input_fd, KDBUS_CMD_FREE, &off);
139 sd_bus_unref(m->bus);
142 close_many(m->fds, m->n_fds);
146 if (m->iovec != m->iovec_fixed)
149 message_reset_containers(m);
150 free(m->root_container.signature);
151 free(m->root_container.offsets);
153 free(m->peeked_signature);
155 bus_creds_done(&m->creds);
159 static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) {
161 size_t old_size, new_size, start;
168 old_size = sizeof(struct bus_header) + m->header->fields_size;
169 start = ALIGN_TO(old_size, align);
170 new_size = start + sz;
172 if (old_size == new_size)
173 return (uint8_t*) m->header + old_size;
175 if (new_size > (size_t) ((uint32_t) -1))
178 if (m->free_header) {
179 np = realloc(m->header, ALIGN8(new_size));
183 /* Initially, the header is allocated as part of of
184 * the sd_bus_message itself, let's replace it by
187 np = malloc(ALIGN8(new_size));
191 memcpy(np, m->header, sizeof(struct bus_header));
194 /* Zero out padding */
195 if (start > old_size)
196 memset((uint8_t*) np + old_size, 0, start - old_size);
200 m->header->fields_size = new_size - sizeof(struct bus_header);
202 /* Adjust quick access pointers */
203 m->path = adjust_pointer(m->path, op, old_size, m->header);
204 m->interface = adjust_pointer(m->interface, op, old_size, m->header);
205 m->member = adjust_pointer(m->member, op, old_size, m->header);
206 m->destination = adjust_pointer(m->destination, op, old_size, m->header);
207 m->sender = adjust_pointer(m->sender, op, old_size, m->header);
208 m->error.name = adjust_pointer(m->error.name, op, old_size, m->header);
210 m->free_header = true;
213 if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets))
216 m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header);
219 return (uint8_t*) np + start;
226 static int message_append_field_string(
238 /* dbus1 doesn't allow strings over 32bit, let's enforce this
239 * globally, to not risk convertability */
241 if (l > (size_t) (uint32_t) -1)
244 /* Signature "(yv)" where the variant contains "s" */
246 if (BUS_MESSAGE_IS_GVARIANT(m)) {
248 /* (field id byte + 7x padding, ((string + NUL) + NUL + signature string 's') */
249 p = message_extend_fields(m, 8, 1 + 7 + l + 1 + 1 + 1, true);
261 *ret = (char*) p + 8;
264 /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */
265 p = message_extend_fields(m, 8, 4 + 4 + l + 1, false);
274 ((uint32_t*) p)[1] = l;
275 memcpy(p + 8, s, l + 1);
278 *ret = (char*) p + 8;
284 static int message_append_field_signature(
295 /* dbus1 doesn't allow signatures over 32bit, let's enforce
296 * this globally, to not risk convertability */
301 /* Signature "(yv)" where the variant contains "g" */
303 if (BUS_MESSAGE_IS_GVARIANT(m))
304 /* For gvariant the serialization is the same as for normal strings */
305 return message_append_field_string(m, h, 'g', s, ret);
307 /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */
308 p = message_extend_fields(m, 8, 4 + 1 + l + 1, false);
314 p[2] = SD_BUS_TYPE_SIGNATURE;
317 memcpy(p + 5, s, l + 1);
320 *ret = (const char*) p + 5;
326 static int message_append_field_uint32(sd_bus_message *m, uint8_t h, uint32_t x) {
331 if (BUS_MESSAGE_IS_GVARIANT(m)) {
332 /* (field id byte + 7x padding + ((value + NUL + signature string 'u') */
334 p = message_extend_fields(m, 8, 1 + 7 + 4 + 1 + 1, true);
340 *((uint32_t*) (p + 8)) = x;
344 /* (field id byte + (signature length + signature 'u' + NUL) + value) */
345 p = message_extend_fields(m, 8, 4 + 4, false);
351 p[2] = SD_BUS_TYPE_UINT32;
354 ((uint32_t*) p)[1] = x;
360 int bus_message_from_header(
366 const struct ucred *ucred,
369 sd_bus_message **ret) {
372 struct bus_header *h;
375 assert(buffer || length <= 0);
376 assert(fds || n_fds <= 0);
379 if (length < sizeof(struct bus_header))
383 if (h->version != 1 &&
390 if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID)
393 if (h->endian != BUS_LITTLE_ENDIAN &&
394 h->endian != BUS_BIG_ENDIAN)
397 a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra);
400 label_sz = strlen(label);
415 m->creds.uid = ucred->uid;
416 m->creds.pid = ucred->pid;
417 m->creds.gid = ucred->gid;
418 m->creds.mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID;
422 m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra);
423 memcpy(m->creds.label, label, label_sz + 1);
425 m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
429 m->bus = sd_bus_ref(bus);
435 int bus_message_from_malloc(
441 const struct ucred *ucred,
443 sd_bus_message **ret) {
449 r = bus_message_from_header(bus, buffer, length, fds, n_fds, ucred, label, 0, &m);
453 if (length != BUS_MESSAGE_SIZE(m)) {
458 sz = length - sizeof(struct bus_header) - ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
461 m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
463 m->body.sealed = true;
468 m->iovec = m->iovec_fixed;
469 m->iovec[0].iov_base = buffer;
470 m->iovec[0].iov_len = length;
472 r = bus_message_parse_fields(m);
476 /* We take possession of the memory and fds now */
477 m->free_header = true;
488 static sd_bus_message *message_new(sd_bus *bus, uint8_t type) {
491 m = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header));
496 m->header = (struct bus_header*) ((uint8_t*) m + ALIGN(sizeof(struct sd_bus_message)));
497 m->header->endian = BUS_NATIVE_ENDIAN;
498 m->header->type = type;
499 m->header->version = bus ? bus->message_version : 1;
500 m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING);
501 m->root_container.need_offsets = BUS_MESSAGE_IS_GVARIANT(m);
504 m->bus = sd_bus_ref(bus);
509 _public_ int sd_bus_message_new_signal(
512 const char *interface,
514 sd_bus_message **m) {
519 assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN);
520 assert_return(object_path_is_valid(path), -EINVAL);
521 assert_return(interface_name_is_valid(interface), -EINVAL);
522 assert_return(member_name_is_valid(member), -EINVAL);
523 assert_return(m, -EINVAL);
525 t = message_new(bus, SD_BUS_MESSAGE_SIGNAL);
529 t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
531 r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path);
534 r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface);
537 r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member);
545 sd_bus_message_unref(t);
549 _public_ int sd_bus_message_new_method_call(
551 const char *destination,
553 const char *interface,
555 sd_bus_message **m) {
560 assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN);
561 assert_return(!destination || service_name_is_valid(destination), -EINVAL);
562 assert_return(object_path_is_valid(path), -EINVAL);
563 assert_return(!interface || interface_name_is_valid(interface), -EINVAL);
564 assert_return(member_name_is_valid(member), -EINVAL);
565 assert_return(m, -EINVAL);
567 t = message_new(bus, SD_BUS_MESSAGE_METHOD_CALL);
571 r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path);
574 r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member);
579 r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface);
585 r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination);
598 static int message_new_reply(
599 sd_bus_message *call,
601 sd_bus_message **m) {
606 assert_return(call, -EINVAL);
607 assert_return(call->sealed, -EPERM);
608 assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
609 assert_return(!call->bus || call->bus->state != BUS_UNSET, -ENOTCONN);
610 assert_return(m, -EINVAL);
612 t = message_new(call->bus, type);
616 t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
617 t->reply_serial = BUS_MESSAGE_SERIAL(call);
619 r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial);
624 r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination);
629 t->dont_send = !!(call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED);
630 t->enforced_reply_signature = call->enforced_reply_signature;
640 _public_ int sd_bus_message_new_method_return(
641 sd_bus_message *call,
642 sd_bus_message **m) {
644 return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m);
647 _public_ int sd_bus_message_new_method_error(
648 sd_bus_message *call,
649 const sd_bus_error *e,
650 sd_bus_message **m) {
655 assert_return(sd_bus_error_is_set(e), -EINVAL);
656 assert_return(m, -EINVAL);
658 r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t);
662 r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name);
667 r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message);
672 t->error._need_free = -1;
682 _public_ int sd_bus_message_new_method_errorf(
683 sd_bus_message *call,
689 _cleanup_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
692 assert_return(name, -EINVAL);
693 assert_return(m, -EINVAL);
695 va_start(ap, format);
696 bus_error_setfv(&error, name, format, ap);
699 return sd_bus_message_new_method_error(call, &error, m);
702 _public_ int sd_bus_message_new_method_errno(
703 sd_bus_message *call,
705 const sd_bus_error *p,
706 sd_bus_message **m) {
708 _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
710 if (sd_bus_error_is_set(p))
711 return sd_bus_message_new_method_error(call, p, m);
713 sd_bus_error_set_errno(&berror, error);
715 return sd_bus_message_new_method_error(call, &berror, m);
718 _public_ int sd_bus_message_new_method_errnof(
719 sd_bus_message *call,
725 _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
728 va_start(ap, format);
729 bus_error_set_errnofv(&berror, error, format, ap);
732 return sd_bus_message_new_method_error(call, &berror, m);
735 int bus_message_new_synthetic_error(
738 const sd_bus_error *e,
739 sd_bus_message **m) {
744 assert(sd_bus_error_is_set(e));
747 t = message_new(bus, SD_BUS_MESSAGE_METHOD_ERROR);
751 t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
752 t->reply_serial = serial;
754 r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial);
758 if (bus && bus->unique_name) {
759 r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination);
764 r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name);
769 r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message);
774 t->error._need_free = -1;
784 _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) {
785 assert_return(m, NULL);
787 assert(m->n_ref > 0);
793 _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) {
794 assert_return(m, NULL);
796 assert(m->n_ref > 0);
805 _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) {
806 assert_return(m, -EINVAL);
807 assert_return(type, -EINVAL);
809 *type = m->header->type;
813 _public_ int sd_bus_message_get_serial(sd_bus_message *m, uint64_t *serial) {
814 assert_return(m, -EINVAL);
815 assert_return(serial, -EINVAL);
816 assert_return(m->header->serial != 0, -ENOENT);
818 *serial = BUS_MESSAGE_SERIAL(m);
822 _public_ int sd_bus_message_get_reply_serial(sd_bus_message *m, uint64_t *serial) {
823 assert_return(m, -EINVAL);
824 assert_return(serial, -EINVAL);
825 assert_return(m->reply_serial != 0, -ENOENT);
827 *serial = m->reply_serial;
831 _public_ int sd_bus_message_get_no_reply(sd_bus_message *m) {
832 assert_return(m, -EINVAL);
834 return m->header->type == SD_BUS_MESSAGE_METHOD_CALL ? !!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) : 0;
837 _public_ int sd_bus_message_get_no_auto_start(sd_bus_message *m) {
838 assert_return(m, -EINVAL);
840 return !!(m->header->flags & BUS_MESSAGE_NO_AUTO_START);
843 _public_ const char *sd_bus_message_get_path(sd_bus_message *m) {
844 assert_return(m, NULL);
849 _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) {
850 assert_return(m, NULL);
855 _public_ const char *sd_bus_message_get_member(sd_bus_message *m) {
856 assert_return(m, NULL);
861 _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) {
862 assert_return(m, NULL);
864 return m->destination;
867 _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) {
868 assert_return(m, NULL);
873 _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) {
874 assert_return(m, NULL);
875 assert_return(sd_bus_error_is_set(&m->error), NULL);
880 _public_ int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) {
881 assert_return(m, -EINVAL);
882 assert_return(usec, -EINVAL);
883 assert_return(m->monotonic > 0, -ENODATA);
885 *usec = m->monotonic;
889 _public_ int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) {
890 assert_return(m, -EINVAL);
891 assert_return(usec, -EINVAL);
892 assert_return(m->realtime > 0, -ENODATA);
898 _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) {
899 assert_return(m, NULL);
901 if (m->creds.mask == 0)
907 _public_ int sd_bus_message_is_signal(sd_bus_message *m,
908 const char *interface,
909 const char *member) {
910 assert_return(m, -EINVAL);
912 if (m->header->type != SD_BUS_MESSAGE_SIGNAL)
915 if (interface && (!m->interface || !streq(m->interface, interface)))
918 if (member && (!m->member || !streq(m->member, member)))
924 _public_ int sd_bus_message_is_method_call(sd_bus_message *m,
925 const char *interface,
926 const char *member) {
927 assert_return(m, -EINVAL);
929 if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
932 if (interface && (!m->interface || !streq(m->interface, interface)))
935 if (member && (!m->member || !streq(m->member, member)))
941 _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) {
942 assert_return(m, -EINVAL);
944 if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
947 if (name && (!m->error.name || !streq(m->error.name, name)))
953 _public_ int sd_bus_message_set_no_reply(sd_bus_message *m, int b) {
954 assert_return(m, -EINVAL);
955 assert_return(!m->sealed, -EPERM);
956 assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM);
959 m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
961 m->header->flags &= ~BUS_MESSAGE_NO_REPLY_EXPECTED;
966 _public_ int sd_bus_message_set_no_auto_start(sd_bus_message *m, int b) {
967 assert_return(m, -EINVAL);
968 assert_return(!m->sealed, -EPERM);
971 m->header->flags |= BUS_MESSAGE_NO_AUTO_START;
973 m->header->flags &= ~BUS_MESSAGE_NO_AUTO_START;
978 static struct bus_container *message_get_container(sd_bus_message *m) {
981 if (m->n_containers == 0)
982 return &m->root_container;
984 assert(m->containers);
985 return m->containers + m->n_containers - 1;
988 struct bus_body_part *message_append_part(sd_bus_message *m) {
989 struct bus_body_part *part;
996 if (m->n_body_parts <= 0) {
1000 assert(m->body_end);
1002 part = new0(struct bus_body_part, 1);
1008 m->body_end->next = part;
1018 static void part_zero(struct bus_body_part *part, size_t sz) {
1023 /* All other fields can be left in their defaults */
1024 assert(!part->data);
1025 assert(part->memfd < 0);
1028 part->is_zero = true;
1029 part->sealed = true;
1032 static int part_make_space(
1033 struct sd_bus_message *m,
1034 struct bus_body_part *part,
1043 assert(!part->sealed);
1048 if (!part->data && part->memfd < 0)
1049 part->memfd = bus_kernel_pop_memfd(m->bus, &part->data, &part->mapped);
1051 if (part->memfd >= 0) {
1054 r = ioctl(part->memfd, KDBUS_CMD_MEMFD_SIZE_SET, &u);
1060 if (!part->data || sz > part->mapped) {
1061 size_t psz = PAGE_ALIGN(sz > 0 ? sz : 1);
1063 if (part->mapped <= 0)
1064 n = mmap(NULL, psz, PROT_READ|PROT_WRITE, MAP_SHARED, part->memfd, 0);
1066 n = mremap(part->data, part->mapped, psz, MREMAP_MAYMOVE);
1068 if (n == MAP_FAILED) {
1077 part->munmap_this = true;
1079 n = realloc(part->data, MAX(sz, 1u));
1086 part->free_this = true;
1090 *q = part->data ? (uint8_t*) part->data + part->size : NULL;
1096 static int message_add_offset(sd_bus_message *m, size_t offset) {
1097 struct bus_container *c;
1100 assert(BUS_MESSAGE_IS_GVARIANT(m));
1102 /* Add offset to current container, unless this is the first
1103 * item in it, which will have the 0 offset, which we can
1105 c = message_get_container(m);
1107 if (!c->need_offsets)
1110 if (!GREEDY_REALLOC(c->offsets, c->n_offsets_allocated, c->n_offsets + 1))
1113 c->offsets[c->n_offsets++] = offset;
1117 static void message_extend_containers(sd_bus_message *m, size_t expand) {
1118 struct bus_container *c;
1125 /* Update counters */
1126 for (c = m->containers; c < m->containers + m->n_containers; c++) {
1129 *c->array_size += expand;
1133 static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz, bool add_offset) {
1134 size_t start_body, end_body, padding, added;
1145 start_body = ALIGN_TO((size_t) m->header->body_size, align);
1146 end_body = start_body + sz;
1148 padding = start_body - m->header->body_size;
1149 added = padding + sz;
1151 /* Check for 32bit overflows */
1152 if (end_body > (size_t) ((uint32_t) -1)) {
1158 struct bus_body_part *part = NULL;
1162 m->n_body_parts <= 0 ||
1163 m->body_end->sealed ||
1164 padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size;
1168 part = message_append_part(m);
1172 part_zero(part, padding);
1175 part = message_append_part(m);
1179 r = part_make_space(m, part, sz, &p);
1183 struct bus_container *c;
1185 size_t os, start_part, end_part;
1191 start_part = ALIGN_TO(part->size, align);
1192 end_part = start_part + sz;
1194 r = part_make_space(m, part, end_part, &p);
1199 memset(p, 0, padding);
1200 p = (uint8_t*) p + padding;
1203 /* Readjust pointers */
1204 for (c = m->containers; c < m->containers + m->n_containers; c++)
1205 c->array_size = adjust_pointer(c->array_size, op, os, part->data);
1207 m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data);
1210 /* Return something that is not NULL and is aligned */
1211 p = (uint8_t *) NULL + align;
1213 m->header->body_size = end_body;
1214 message_extend_containers(m, added);
1217 r = message_add_offset(m, end_body);
1227 static int message_push_fd(sd_bus_message *m, int fd) {
1238 copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
1242 f = realloc(m->fds, sizeof(int) * (m->n_fds + 1));
1245 close_nointr_nofail(copy);
1250 m->fds[m->n_fds] = copy;
1256 int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) {
1257 _cleanup_close_ int fd = -1;
1258 struct bus_container *c;
1262 assert_return(m, -EINVAL);
1263 assert_return(!m->sealed, -EPERM);
1264 assert_return(bus_type_is_basic(type), -EINVAL);
1265 assert_return(!m->poisoned, -ESTALE);
1267 c = message_get_container(m);
1269 if (c->signature && c->signature[c->index]) {
1270 /* Container signature is already set */
1272 if (c->signature[c->index] != type)
1277 /* Maybe we can append to the signature? But only if this is the top-level container*/
1278 if (c->enclosing != 0)
1281 e = strextend(&c->signature, CHAR_TO_STR(type), NULL);
1288 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1294 case SD_BUS_TYPE_SIGNATURE:
1295 case SD_BUS_TYPE_STRING:
1298 /* Fall through... */
1299 case SD_BUS_TYPE_OBJECT_PATH:
1307 case SD_BUS_TYPE_BOOLEAN:
1309 u8 = p && *(int*) p;
1315 case SD_BUS_TYPE_UNIX_FD:
1320 fd = message_push_fd(m, *(int*) p);
1331 align = bus_gvariant_get_alignment(CHAR_TO_STR(type));
1332 sz = bus_gvariant_get_size(CHAR_TO_STR(type));
1339 a = message_extend_body(m, align, sz, true);
1346 *stored = (const uint8_t*) a;
1353 case SD_BUS_TYPE_STRING:
1354 /* To make things easy we'll serialize a NULL string
1355 * into the empty string */
1358 /* Fall through... */
1359 case SD_BUS_TYPE_OBJECT_PATH:
1365 sz = 4 + strlen(p) + 1;
1368 case SD_BUS_TYPE_SIGNATURE:
1373 sz = 1 + strlen(p) + 1;
1376 case SD_BUS_TYPE_BOOLEAN:
1378 u32 = p && *(int*) p;
1384 case SD_BUS_TYPE_UNIX_FD:
1389 fd = message_push_fd(m, *(int*) p);
1400 align = bus_type_get_alignment(type);
1401 sz = bus_type_get_size(type);
1408 a = message_extend_body(m, align, sz, false);
1412 if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) {
1413 *(uint32_t*) a = sz - 5;
1414 memcpy((uint8_t*) a + 4, p, sz - 4);
1417 *stored = (const uint8_t*) a + 4;
1419 } else if (type == SD_BUS_TYPE_SIGNATURE) {
1420 *(uint8_t*) a = sz - 1;
1421 memcpy((uint8_t*) a + 1, p, sz - 1);
1424 *stored = (const uint8_t*) a + 1;
1433 if (type == SD_BUS_TYPE_UNIX_FD)
1436 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1443 _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) {
1444 return message_append_basic(m, type, p, NULL);
1447 _public_ int sd_bus_message_append_string_space(
1452 struct bus_container *c;
1455 assert_return(m, -EINVAL);
1456 assert_return(s, -EINVAL);
1457 assert_return(!m->sealed, -EPERM);
1458 assert_return(!m->poisoned, -ESTALE);
1460 c = message_get_container(m);
1462 if (c->signature && c->signature[c->index]) {
1463 /* Container signature is already set */
1465 if (c->signature[c->index] != SD_BUS_TYPE_STRING)
1470 /* Maybe we can append to the signature? But only if this is the top-level container*/
1471 if (c->enclosing != 0)
1474 e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL);
1481 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1482 a = message_extend_body(m, 1, size + 1, true);
1488 a = message_extend_body(m, 4, 4 + size + 1, false);
1492 *(uint32_t*) a = size;
1498 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1504 _public_ int sd_bus_message_append_string_iovec(
1506 const struct iovec *iov,
1514 assert_return(m, -EINVAL);
1515 assert_return(!m->sealed, -EPERM);
1516 assert_return(iov || n == 0, -EINVAL);
1517 assert_return(!m->poisoned, -ESTALE);
1519 size = IOVEC_TOTAL_SIZE(iov, n);
1521 r = sd_bus_message_append_string_space(m, size, &p);
1525 for (i = 0; i < n; i++) {
1527 if (iov[i].iov_base)
1528 memcpy(p, iov[i].iov_base, iov[i].iov_len);
1530 memset(p, ' ', iov[i].iov_len);
1532 p += iov[i].iov_len;
1538 static int bus_message_open_array(
1540 struct bus_container *c,
1541 const char *contents,
1542 uint32_t **array_size,
1544 bool *need_offsets) {
1554 assert(need_offsets);
1556 if (!signature_is_single(contents, true))
1559 if (c->signature && c->signature[c->index]) {
1561 /* Verify the existing signature */
1563 if (c->signature[c->index] != SD_BUS_TYPE_ARRAY)
1566 if (!startswith(c->signature + c->index + 1, contents))
1569 nindex = c->index + 1 + strlen(contents);
1573 if (c->enclosing != 0)
1576 /* Extend the existing signature */
1578 e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL);
1584 nindex = e - c->signature;
1587 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1588 alignment = bus_gvariant_get_alignment(contents);
1592 /* Add alignment padding and add to offset list */
1593 if (!message_extend_body(m, alignment, 0, false))
1596 r = bus_gvariant_is_fixed_size(contents);
1600 *begin = m->header->body_size;
1601 *need_offsets = r == 0;
1605 struct bus_body_part *o;
1607 alignment = bus_type_get_alignment(contents[0]);
1611 a = message_extend_body(m, 4, 4, false);
1616 op = m->body_end->data;
1617 os = m->body_end->size;
1619 /* Add alignment between size and first element */
1620 if (!message_extend_body(m, alignment, 0, false))
1623 /* location of array size might have changed so let's readjust a */
1624 if (o == m->body_end)
1625 a = adjust_pointer(a, op, os, m->body_end->data);
1631 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1637 static int bus_message_open_variant(
1639 struct bus_container *c,
1640 const char *contents) {
1646 if (!signature_is_single(contents, false))
1649 if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN)
1652 if (c->signature && c->signature[c->index]) {
1654 if (c->signature[c->index] != SD_BUS_TYPE_VARIANT)
1660 if (c->enclosing != 0)
1663 e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL);
1670 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1671 /* Variants are always aligned to 8 */
1673 if (!message_extend_body(m, 8, 0, false))
1680 l = strlen(contents);
1681 a = message_extend_body(m, 1, 1 + l + 1, false);
1686 memcpy((uint8_t*) a + 1, contents, l + 1);
1689 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1695 static int bus_message_open_struct(
1697 struct bus_container *c,
1698 const char *contents,
1700 bool *need_offsets) {
1709 assert(need_offsets);
1711 if (!signature_is_valid(contents, false))
1714 if (c->signature && c->signature[c->index]) {
1717 l = strlen(contents);
1719 if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN ||
1720 !startswith(c->signature + c->index + 1, contents) ||
1721 c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END)
1724 nindex = c->index + 1 + l + 1;
1728 if (c->enclosing != 0)
1731 e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL);
1737 nindex = e - c->signature;
1740 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1743 alignment = bus_gvariant_get_alignment(contents);
1747 if (!message_extend_body(m, alignment, 0, false))
1750 r = bus_gvariant_is_fixed_size(contents);
1754 *begin = m->header->body_size;
1755 *need_offsets = r == 0;
1757 /* Align contents to 8 byte boundary */
1758 if (!message_extend_body(m, 8, 0, false))
1762 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1768 static int bus_message_open_dict_entry(
1770 struct bus_container *c,
1771 const char *contents,
1773 bool *need_offsets) {
1781 assert(need_offsets);
1783 if (!signature_is_pair(contents))
1786 if (c->enclosing != SD_BUS_TYPE_ARRAY)
1789 if (c->signature && c->signature[c->index]) {
1792 l = strlen(contents);
1794 if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN ||
1795 !startswith(c->signature + c->index + 1, contents) ||
1796 c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END)
1801 if (BUS_MESSAGE_IS_GVARIANT(m)) {
1804 alignment = bus_gvariant_get_alignment(contents);
1808 if (!message_extend_body(m, alignment, 0, false))
1811 r = bus_gvariant_is_fixed_size(contents);
1815 *begin = m->header->body_size;
1816 *need_offsets = r == 0;
1818 /* Align contents to 8 byte boundary */
1819 if (!message_extend_body(m, 8, 0, false))
1826 _public_ int sd_bus_message_open_container(
1829 const char *contents) {
1831 struct bus_container *c, *w;
1832 uint32_t *array_size = NULL;
1834 size_t before, begin;
1835 bool need_offsets = false;
1838 assert_return(m, -EINVAL);
1839 assert_return(!m->sealed, -EPERM);
1840 assert_return(contents, -EINVAL);
1841 assert_return(!m->poisoned, -ESTALE);
1843 /* Make sure we have space for one more container */
1844 w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
1852 c = message_get_container(m);
1854 signature = strdup(contents);
1860 /* Save old index in the parent container, in case we have to
1861 * abort this container */
1862 c->saved_index = c->index;
1863 before = m->header->body_size;
1865 if (type == SD_BUS_TYPE_ARRAY)
1866 r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets);
1867 else if (type == SD_BUS_TYPE_VARIANT)
1868 r = bus_message_open_variant(m, c, contents);
1869 else if (type == SD_BUS_TYPE_STRUCT)
1870 r = bus_message_open_struct(m, c, contents, &begin, &need_offsets);
1871 else if (type == SD_BUS_TYPE_DICT_ENTRY)
1872 r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets);
1881 /* OK, let's fill it in */
1882 w += m->n_containers++;
1883 w->enclosing = type;
1884 w->signature = signature;
1886 w->array_size = array_size;
1889 w->n_offsets = w->n_offsets_allocated = 0;
1891 w->need_offsets = need_offsets;
1896 static size_t determine_word_size(size_t sz, size_t extra) {
1897 if (sz <= 0 && extra == 0)
1899 else if (sz + extra <= 0xFF)
1901 else if (sz + extra*2 <= 0xFFFF)
1903 else if (sz + extra*4 <= 0xFFFFFFFF)
1909 static size_t read_word_le(void *p, size_t sz) {
1919 return *(uint8_t*) p;
1924 return le16toh(x.u16);
1926 return le32toh(x.u32);
1928 return le64toh(x.u64);
1930 assert_not_reached("unknown word width");
1933 static void write_word_le(void *p, size_t sz, size_t value) {
1941 assert(sz == 8 || (value < (1ULL << (sz*8))));
1944 *(uint8_t*) p = value;
1947 x.u16 = htole16((uint16_t) value);
1949 x.u32 = htole32((uint32_t) value);
1951 x.u64 = htole64((uint64_t) value);
1953 assert_not_reached("unknown word width");
1958 static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) {
1963 if (!BUS_MESSAGE_IS_GVARIANT(m))
1966 if (c->need_offsets) {
1967 size_t payload, sz, i;
1970 /* Variable-width arrays */
1972 payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0;
1973 sz = determine_word_size(payload, c->n_offsets);
1975 a = message_extend_body(m, 1, sz * c->n_offsets, true);
1979 for (i = 0; i < c->n_offsets; i++)
1980 write_word_le(a + sz*i, sz, c->offsets[i] - c->begin);
1984 /* Fixed-width or empty arrays */
1986 a = message_extend_body(m, 1, 0, true); /* let's add offset to parent */
1994 static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) {
2001 if (!BUS_MESSAGE_IS_GVARIANT(m))
2004 l = strlen(c->signature);
2006 a = message_extend_body(m, 1, 1 + l, true);
2011 memcpy(a+1, c->signature, l);
2016 static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) {
2017 size_t n_variable = 0;
2026 if (!BUS_MESSAGE_IS_GVARIANT(m))
2029 p = strempty(c->signature);
2033 r = signature_element_length(p, &n);
2042 r = bus_gvariant_is_fixed_size(t);
2047 assert(i <= c->n_offsets);
2049 /* We need to add an offset for each item that has a
2050 * variable size and that is not the last one in the
2052 if (r == 0 && p[n] != 0)
2059 assert(i == c->n_offsets);
2061 if (n_variable <= 0) {
2062 a = message_extend_body(m, 1, 0, add_offset);
2069 assert(c->offsets[c->n_offsets-1] == m->header->body_size);
2071 sz = determine_word_size(m->header->body_size - c->begin, n_variable);
2073 a = message_extend_body(m, 1, sz * n_variable, add_offset);
2077 p = strempty(c->signature);
2078 for (i = 0, j = 0; i < c->n_offsets; i++) {
2082 r = signature_element_length(p, &n);
2093 r = bus_gvariant_is_fixed_size(t);
2096 if (r > 0 || p[0] == 0)
2100 k = n_variable - 1 - j;
2102 write_word_le(a + k * sz, sz, c->offsets[i] - c->begin);
2111 _public_ int sd_bus_message_close_container(sd_bus_message *m) {
2112 struct bus_container *c;
2115 assert_return(m, -EINVAL);
2116 assert_return(!m->sealed, -EPERM);
2117 assert_return(m->n_containers > 0, -EINVAL);
2118 assert_return(!m->poisoned, -ESTALE);
2120 c = message_get_container(m);
2122 if (c->enclosing != SD_BUS_TYPE_ARRAY)
2123 if (c->signature && c->signature[c->index] != 0)
2128 if (c->enclosing == SD_BUS_TYPE_ARRAY)
2129 r = bus_message_close_array(m, c);
2130 else if (c->enclosing == SD_BUS_TYPE_VARIANT)
2131 r = bus_message_close_variant(m, c);
2132 else if (c->enclosing == SD_BUS_TYPE_STRUCT || c->enclosing == SD_BUS_TYPE_DICT_ENTRY)
2133 r = bus_message_close_struct(m, c, true);
2135 assert_not_reached("Unknown container type");
2149 static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) {
2156 stack[*i].types = types;
2157 stack[*i].n_struct = n_struct;
2158 stack[*i].n_array = n_array;
2164 static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) {
2175 *types = stack[*i].types;
2176 *n_struct = stack[*i].n_struct;
2177 *n_array = stack[*i].n_array;
2182 int bus_message_append_ap(
2187 unsigned n_array, n_struct;
2188 TypeStack stack[BUS_CONTAINER_DEPTH];
2189 unsigned stack_ptr = 0;
2197 n_array = (unsigned) -1;
2198 n_struct = strlen(types);
2203 if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) {
2204 r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array);
2210 r = sd_bus_message_close_container(m);
2218 if (n_array != (unsigned) -1)
2227 case SD_BUS_TYPE_BYTE: {
2230 x = (uint8_t) va_arg(ap, int);
2231 r = sd_bus_message_append_basic(m, *t, &x);
2235 case SD_BUS_TYPE_BOOLEAN:
2236 case SD_BUS_TYPE_INT32:
2237 case SD_BUS_TYPE_UINT32:
2238 case SD_BUS_TYPE_UNIX_FD: {
2241 /* We assume a boolean is the same as int32_t */
2242 assert_cc(sizeof(int32_t) == sizeof(int));
2244 x = va_arg(ap, uint32_t);
2245 r = sd_bus_message_append_basic(m, *t, &x);
2249 case SD_BUS_TYPE_INT16:
2250 case SD_BUS_TYPE_UINT16: {
2253 x = (uint16_t) va_arg(ap, int);
2254 r = sd_bus_message_append_basic(m, *t, &x);
2258 case SD_BUS_TYPE_INT64:
2259 case SD_BUS_TYPE_UINT64:
2260 case SD_BUS_TYPE_DOUBLE: {
2263 x = va_arg(ap, uint64_t);
2264 r = sd_bus_message_append_basic(m, *t, &x);
2268 case SD_BUS_TYPE_STRING:
2269 case SD_BUS_TYPE_OBJECT_PATH:
2270 case SD_BUS_TYPE_SIGNATURE: {
2273 x = va_arg(ap, const char*);
2274 r = sd_bus_message_append_basic(m, *t, x);
2278 case SD_BUS_TYPE_ARRAY: {
2281 r = signature_element_length(t + 1, &k);
2287 memcpy(s, t + 1, k);
2290 r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s);
2295 if (n_array == (unsigned) -1) {
2300 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
2306 n_array = va_arg(ap, unsigned);
2311 case SD_BUS_TYPE_VARIANT: {
2314 s = va_arg(ap, const char*);
2318 r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s);
2322 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
2327 n_struct = strlen(s);
2328 n_array = (unsigned) -1;
2333 case SD_BUS_TYPE_STRUCT_BEGIN:
2334 case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
2337 r = signature_element_length(t, &k);
2344 memcpy(s, t + 1, k - 2);
2347 r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
2352 if (n_array == (unsigned) -1) {
2357 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
2363 n_array = (unsigned) -1;
2379 _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) {
2383 assert_return(m, -EINVAL);
2384 assert_return(types, -EINVAL);
2385 assert_return(!m->sealed, -EPERM);
2386 assert_return(!m->poisoned, -ESTALE);
2388 va_start(ap, types);
2389 r = bus_message_append_ap(m, types, ap);
2395 _public_ int sd_bus_message_append_array_space(
2405 assert_return(m, -EINVAL);
2406 assert_return(!m->sealed, -EPERM);
2407 assert_return(bus_type_is_trivial(type) && type != SD_BUS_TYPE_BOOLEAN, -EINVAL);
2408 assert_return(ptr || size == 0, -EINVAL);
2409 assert_return(!m->poisoned, -ESTALE);
2411 /* alignment and size of the trivial types (except bool) is
2412 * identical for gvariant and dbus1 marshalling */
2413 align = bus_type_get_alignment(type);
2414 sz = bus_type_get_size(type);
2416 assert_se(align > 0);
2422 r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
2426 a = message_extend_body(m, align, size, false);
2430 r = sd_bus_message_close_container(m);
2438 _public_ int sd_bus_message_append_array(sd_bus_message *m,
2445 assert_return(m, -EINVAL);
2446 assert_return(!m->sealed, -EPERM);
2447 assert_return(bus_type_is_trivial(type), -EINVAL);
2448 assert_return(ptr || size == 0, -EINVAL);
2449 assert_return(!m->poisoned, -ESTALE);
2451 r = sd_bus_message_append_array_space(m, type, size, &p);
2456 memcpy(p, ptr, size);
2461 _public_ int sd_bus_message_append_array_iovec(
2464 const struct iovec *iov,
2472 assert_return(m, -EINVAL);
2473 assert_return(!m->sealed, -EPERM);
2474 assert_return(bus_type_is_trivial(type), -EINVAL);
2475 assert_return(iov || n == 0, -EINVAL);
2476 assert_return(!m->poisoned, -ESTALE);
2478 size = IOVEC_TOTAL_SIZE(iov, n);
2480 r = sd_bus_message_append_array_space(m, type, size, &p);
2484 for (i = 0; i < n; i++) {
2486 if (iov[i].iov_base)
2487 memcpy(p, iov[i].iov_base, iov[i].iov_len);
2489 memset(p, 0, iov[i].iov_len);
2491 p = (uint8_t*) p + iov[i].iov_len;
2497 _public_ int sd_bus_message_append_array_memfd(sd_bus_message *m,
2500 _cleanup_close_ int copy_fd = -1;
2501 struct bus_body_part *part;
2513 if (!bus_type_is_trivial(type))
2518 r = sd_memfd_set_sealed(memfd, true);
2522 copy_fd = sd_memfd_dup_fd(memfd);
2526 r = sd_memfd_get_size(memfd, &size);
2530 align = bus_type_get_alignment(type);
2531 sz = bus_type_get_size(type);
2533 assert_se(align > 0);
2539 if (size > (uint64_t) (uint32_t) -1)
2542 r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
2546 a = message_extend_body(m, align, 0, false);
2550 part = message_append_part(m);
2554 part->memfd = copy_fd;
2555 part->sealed = true;
2559 m->header->body_size += size;
2560 message_extend_containers(m, size);
2562 return sd_bus_message_close_container(m);
2565 _public_ int sd_bus_message_append_string_memfd(sd_bus_message *m, sd_memfd *memfd) {
2566 _cleanup_close_ int copy_fd = -1;
2567 struct bus_body_part *part;
2568 struct bus_container *c;
2573 assert_return(m, -EINVAL);
2574 assert_return(memfd, -EINVAL);
2575 assert_return(!m->sealed, -EPERM);
2576 assert_return(!m->poisoned, -ESTALE);
2578 r = sd_memfd_set_sealed(memfd, true);
2582 copy_fd = sd_memfd_dup_fd(memfd);
2586 r = sd_memfd_get_size(memfd, &size);
2590 /* We require this to be NUL terminated */
2594 if (size > (uint64_t) (uint32_t) -1)
2597 c = message_get_container(m);
2598 if (c->signature && c->signature[c->index]) {
2599 /* Container signature is already set */
2601 if (c->signature[c->index] != SD_BUS_TYPE_STRING)
2606 /* Maybe we can append to the signature? But only if this is the top-level container*/
2607 if (c->enclosing != 0)
2610 e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL);
2617 if (!BUS_MESSAGE_IS_GVARIANT(m)) {
2618 a = message_extend_body(m, 4, 4, false);
2622 *(uint32_t*) a = size - 1;
2625 part = message_append_part(m);
2629 part->memfd = copy_fd;
2630 part->sealed = true;
2634 m->header->body_size += size;
2635 message_extend_containers(m, size);
2637 if (BUS_MESSAGE_IS_GVARIANT(m)) {
2638 r = message_add_offset(m, m->header->body_size);
2645 if (c->enclosing != SD_BUS_TYPE_ARRAY)
2651 _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) {
2655 assert_return(m, -EINVAL);
2656 assert_return(!m->sealed, -EPERM);
2657 assert_return(!m->poisoned, -ESTALE);
2659 r = sd_bus_message_open_container(m, 'a', "s");
2663 STRV_FOREACH(i, l) {
2664 r = sd_bus_message_append_basic(m, 's', *i);
2669 return sd_bus_message_close_container(m);
2672 static int bus_message_close_header(sd_bus_message *m) {
2678 if (!BUS_MESSAGE_IS_GVARIANT(m))
2681 if (m->n_header_offsets < 1)
2684 assert(m->header->fields_size == m->header_offsets[m->n_header_offsets-1]);
2686 sz = determine_word_size(m->header->fields_size, m->n_header_offsets);
2688 a = message_extend_fields(m, 1, sz * m->n_header_offsets, false);
2692 for (i = 0; i < m->n_header_offsets; i++)
2693 write_word_le(a + sz*i, sz, m->header_offsets[i]);
2698 int bus_message_seal(sd_bus_message *m, uint64_t serial) {
2699 struct bus_body_part *part;
2709 if (m->n_containers > 0)
2715 /* In vtables the return signature of method calls is listed,
2716 * let's check if they match if this is a response */
2717 if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN &&
2718 m->enforced_reply_signature &&
2719 !streq(strempty(m->root_container.signature), m->enforced_reply_signature))
2722 /* If gvariant marshalling is used we need to close the body structure */
2723 r = bus_message_close_struct(m, &m->root_container, false);
2727 /* If there's a non-trivial signature set, then add it in here */
2728 if (!isempty(m->root_container.signature)) {
2729 r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL);
2735 r = message_append_field_uint32(m, BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds);
2740 r = bus_message_close_header(m);
2744 m->header->serial = serial;
2746 /* Add padding at the end of the fields part, since we know
2747 * the body needs to start at an 8 byte alignment. We made
2748 * sure we allocated enough space for this, so all we need to
2749 * do here is to zero it out. */
2750 l = BUS_MESSAGE_FIELDS_SIZE(m);
2753 memset((uint8_t*) BUS_MESSAGE_FIELDS(m) + l, 0, a);
2755 /* If this is something we can send as memfd, then let's seal
2756 the memfd now. Note that we can send memfds as payload only
2757 for directed messages, and not for broadcasts. */
2758 if (m->destination && m->bus && m->bus->use_memfd) {
2759 MESSAGE_FOREACH_PART(part, i, m)
2760 if (part->memfd >= 0 && !part->sealed && (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0)) {
2761 bus_body_part_unmap(part);
2763 if (ioctl(part->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 1) >= 0)
2764 part->sealed = true;
2768 m->root_container.end = BUS_MESSAGE_BODY_SIZE(m);
2769 m->root_container.index = 0;
2770 m->root_container.offset_index = 0;
2771 m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0;
2778 int bus_body_part_map(struct bus_body_part *part) {
2787 if (part->size <= 0)
2790 /* For smaller zero parts (as used for padding) we don't need to map anything... */
2791 if (part->memfd < 0 && part->is_zero && part->size < 8) {
2792 static const uint8_t zeroes[7] = { };
2793 part->data = (void*) zeroes;
2797 psz = PAGE_ALIGN(part->size);
2799 if (part->memfd >= 0)
2800 p = mmap(NULL, psz, PROT_READ, MAP_SHARED, part->memfd, 0);
2801 else if (part->is_zero)
2802 p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
2806 if (p == MAP_FAILED)
2811 part->munmap_this = true;
2816 void bus_body_part_unmap(struct bus_body_part *part) {
2820 if (part->memfd < 0)
2826 if (!part->munmap_this)
2829 assert_se(munmap(part->data, part->mapped) == 0);
2833 part->munmap_this = false;
2838 static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) {
2839 size_t k, start, end;
2844 start = ALIGN_TO((size_t) *rindex, align);
2845 end = start + nbytes;
2850 /* Verify that padding is 0 */
2851 for (k = *rindex; k < start; k++)
2852 if (((const uint8_t*) p)[k] != 0)
2856 *r = (uint8_t*) p + start;
2863 static bool message_end_of_signature(sd_bus_message *m) {
2864 struct bus_container *c;
2868 c = message_get_container(m);
2869 return !c->signature || c->signature[c->index] == 0;
2872 static bool message_end_of_array(sd_bus_message *m, size_t index) {
2873 struct bus_container *c;
2877 c = message_get_container(m);
2878 if (c->enclosing != SD_BUS_TYPE_ARRAY)
2881 if (BUS_MESSAGE_IS_GVARIANT(m))
2882 return index >= c->end;
2884 assert(c->array_size);
2885 return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size);
2889 _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) {
2890 assert_return(m, -EINVAL);
2891 assert_return(m->sealed, -EPERM);
2893 if (complete && m->n_containers > 0)
2896 if (message_end_of_signature(m))
2899 if (message_end_of_array(m, m->rindex))
2905 static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) {
2906 struct bus_body_part *part;
2912 if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) {
2913 part = m->cached_rindex_part;
2914 begin = m->cached_rindex_part_begin;
2924 if (index + sz <= begin + part->size) {
2926 r = bus_body_part_map(part);
2931 *p = (uint8_t*) part->data + index - begin;
2933 m->cached_rindex_part = part;
2934 m->cached_rindex_part_begin = begin;
2939 begin += part->size;
2946 static int container_next_item(sd_bus_message *m, struct bus_container *c, size_t *rindex) {
2953 if (!BUS_MESSAGE_IS_GVARIANT(m))
2956 if (c->enclosing == SD_BUS_TYPE_ARRAY) {
2959 sz = bus_gvariant_get_size(c->signature);
2963 if (c->offset_index+1 >= c->n_offsets)
2966 /* Variable-size array */
2968 alignment = bus_gvariant_get_alignment(c->signature);
2969 assert(alignment > 0);
2971 *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment);
2972 c->item_size = c->offsets[c->offset_index+1] - *rindex;
2975 if (c->offset_index+1 >= (c->end-c->begin)/sz)
2978 /* Fixed-size array */
2979 *rindex = c->begin + (c->offset_index+1) * sz;
2985 } else if (c->enclosing == 0 ||
2986 c->enclosing == SD_BUS_TYPE_STRUCT ||
2987 c->enclosing == SD_BUS_TYPE_DICT_ENTRY) {
2992 if (c->offset_index+1 >= c->n_offsets)
2995 r = signature_element_length(c->signature + c->index, &n);
2999 r = signature_element_length(c->signature + c->index + n, &j);
3004 memcpy(t, c->signature + c->index + n, j);
3007 alignment = bus_gvariant_get_alignment(t);
3010 assert(alignment > 0);
3012 *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment);
3013 c->item_size = c->offsets[c->offset_index+1] - *rindex;
3017 } else if (c->enclosing == SD_BUS_TYPE_VARIANT)
3020 assert_not_reached("Unknown container type");
3025 /* Reached the end */
3032 static int message_peek_body(
3039 size_t k, start, end, padding;
3040 struct bus_body_part *part;
3047 start = ALIGN_TO((size_t) *rindex, align);
3048 padding = start - *rindex;
3049 end = start + nbytes;
3051 if (end > BUS_MESSAGE_BODY_SIZE(m))
3054 part = find_part(m, *rindex, padding, (void**) &q);
3059 /* Verify padding */
3060 for (k = 0; k < padding; k++)
3065 part = find_part(m, start, nbytes, (void**) &q);
3077 static bool validate_nul(const char *s, size_t l) {
3079 /* Check for NUL chars in the string */
3080 if (memchr(s, 0, l))
3083 /* Check for NUL termination */
3090 static bool validate_string(const char *s, size_t l) {
3092 if (!validate_nul(s, l))
3095 /* Check if valid UTF8 */
3096 if (!utf8_is_valid(s))
3102 static bool validate_signature(const char *s, size_t l) {
3104 if (!validate_nul(s, l))
3107 /* Check if valid signature */
3108 if (!signature_is_valid(s, true))
3114 static bool validate_object_path(const char *s, size_t l) {
3116 if (!validate_nul(s, l))
3119 if (!object_path_is_valid(s))
3125 _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) {
3126 struct bus_container *c;
3131 assert_return(m, -EINVAL);
3132 assert_return(m->sealed, -EPERM);
3133 assert_return(bus_type_is_basic(type), -EINVAL);
3135 if (message_end_of_signature(m))
3138 if (message_end_of_array(m, m->rindex))
3141 c = message_get_container(m);
3142 if (c->signature[c->index] != type)
3147 if (BUS_MESSAGE_IS_GVARIANT(m)) {
3149 if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) {
3152 r = message_peek_body(m, &rindex, 1, c->item_size, &q);
3156 if (type == SD_BUS_TYPE_STRING)
3157 ok = validate_string(q, c->item_size-1);
3158 else if (type == SD_BUS_TYPE_OBJECT_PATH)
3159 ok = validate_object_path(q, c->item_size-1);
3161 ok = validate_signature(q, c->item_size-1);
3167 *(const char**) p = q;
3171 sz = bus_gvariant_get_size(CHAR_TO_STR(type));
3173 if ((size_t) sz != c->item_size)
3176 align = bus_gvariant_get_alignment(CHAR_TO_STR(type));
3179 r = message_peek_body(m, &rindex, align, c->item_size, &q);
3185 case SD_BUS_TYPE_BYTE:
3187 *(uint8_t*) p = *(uint8_t*) q;
3190 case SD_BUS_TYPE_BOOLEAN:
3192 *(int*) p = !!*(uint8_t*) q;
3195 case SD_BUS_TYPE_INT16:
3196 case SD_BUS_TYPE_UINT16:
3198 *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q);
3201 case SD_BUS_TYPE_INT32:
3202 case SD_BUS_TYPE_UINT32:
3204 *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
3207 case SD_BUS_TYPE_INT64:
3208 case SD_BUS_TYPE_UINT64:
3209 case SD_BUS_TYPE_DOUBLE:
3211 *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q);
3214 case SD_BUS_TYPE_UNIX_FD: {
3217 j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
3222 *(int*) p = m->fds[j];
3228 assert_not_reached("unexpected type");
3232 r = container_next_item(m, c, &rindex);
3239 if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) {
3243 r = message_peek_body(m, &rindex, 4, 4, &q);
3247 l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
3248 r = message_peek_body(m, &rindex, 1, l+1, &q);
3252 if (type == SD_BUS_TYPE_OBJECT_PATH)
3253 ok = validate_object_path(q, l);
3255 ok = validate_string(q, l);
3260 *(const char**) p = q;
3262 } else if (type == SD_BUS_TYPE_SIGNATURE) {
3265 r = message_peek_body(m, &rindex, 1, 1, &q);
3270 r = message_peek_body(m, &rindex, 1, l+1, &q);
3274 if (!validate_signature(q, l))
3278 *(const char**) p = q;
3283 align = bus_type_get_alignment(type);
3286 sz = bus_type_get_size(type);
3289 r = message_peek_body(m, &rindex, align, sz, &q);
3295 case SD_BUS_TYPE_BYTE:
3297 *(uint8_t*) p = *(uint8_t*) q;
3300 case SD_BUS_TYPE_BOOLEAN:
3302 *(int*) p = !!*(uint32_t*) q;
3305 case SD_BUS_TYPE_INT16:
3306 case SD_BUS_TYPE_UINT16:
3308 *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q);
3311 case SD_BUS_TYPE_INT32:
3312 case SD_BUS_TYPE_UINT32:
3314 *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
3317 case SD_BUS_TYPE_INT64:
3318 case SD_BUS_TYPE_UINT64:
3319 case SD_BUS_TYPE_DOUBLE:
3321 *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q);
3324 case SD_BUS_TYPE_UNIX_FD: {
3327 j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
3332 *(int*) p = m->fds[j];
3337 assert_not_reached("Unknown basic type...");
3344 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3350 static int bus_message_enter_array(
3352 struct bus_container *c,
3353 const char *contents,
3354 uint32_t **array_size,
3357 size_t *n_offsets) {
3371 if (!signature_is_single(contents, true))
3374 if (!c->signature || c->signature[c->index] == 0)
3377 if (c->signature[c->index] != SD_BUS_TYPE_ARRAY)
3380 if (!startswith(c->signature + c->index + 1, contents))
3385 if (!BUS_MESSAGE_IS_GVARIANT(m)) {
3388 r = message_peek_body(m, &rindex, 4, 4, &q);
3392 if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE)
3395 alignment = bus_type_get_alignment(contents[0]);
3399 r = message_peek_body(m, &rindex, alignment, 0, NULL);
3403 *array_size = (uint32_t*) q;
3405 } else if (c->item_size <= 0) {
3407 /* gvariant: empty array */
3412 } else if (bus_gvariant_is_fixed_size(contents)) {
3414 /* gvariant: fixed length array */
3415 *item_size = bus_gvariant_get_size(contents);
3420 size_t where, p = 0, framing, sz;
3423 /* gvariant: variable length array */
3424 sz = determine_word_size(c->item_size, 0);
3426 where = rindex + c->item_size - sz;
3427 r = message_peek_body(m, &where, 1, sz, &q);
3431 framing = read_word_le(q, sz);
3432 if (framing > c->item_size - sz)
3434 if ((c->item_size - framing) % sz != 0)
3437 *n_offsets = (c->item_size - framing) / sz;
3439 where = rindex + framing;
3440 r = message_peek_body(m, &where, 1, *n_offsets * sz, &q);
3444 *offsets = new(size_t, *n_offsets);
3448 for (i = 0; i < *n_offsets; i++) {
3451 x = read_word_le((uint8_t*) q + i * sz, sz);
3452 if (x > c->item_size - sz)
3457 (*offsets)[i] = rindex + x;
3461 *item_size = (*offsets)[0] - rindex;
3466 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3467 c->index += 1 + strlen(contents);
3472 static int bus_message_enter_variant(
3474 struct bus_container *c,
3475 const char *contents,
3476 size_t *item_size) {
3488 if (!signature_is_single(contents, false))
3491 if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN)
3494 if (!c->signature || c->signature[c->index] == 0)
3497 if (c->signature[c->index] != SD_BUS_TYPE_VARIANT)
3502 if (BUS_MESSAGE_IS_GVARIANT(m)) {
3505 k = strlen(contents);
3506 if (1+k > c->item_size)
3509 where = rindex + c->item_size - (1+k);
3510 r = message_peek_body(m, &where, 1, 1+k, &q);
3514 if (*(char*) q != 0)
3517 if (memcmp((uint8_t*) q+1, contents, k))
3520 *item_size = c->item_size - (1+k);
3523 r = message_peek_body(m, &rindex, 1, 1, &q);
3528 r = message_peek_body(m, &rindex, 1, l+1, &q);
3532 if (!validate_signature(q, l))
3535 if (!streq(q, contents))
3541 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3547 static int build_struct_offsets(
3549 const char *signature,
3553 size_t *n_offsets) {
3555 unsigned n_variable = 0, n_total = 0, v;
3556 size_t previous = 0, where;
3567 if (isempty(signature)) {
3574 sz = determine_word_size(size, 0);
3578 /* First, loop over signature and count variable elements and
3579 * elements in general. We use this to know how large the
3580 * offset array is at the end of the structure. Note that
3581 * GVariant only stores offsets for all variable size elements
3582 * that are not the last item. */
3588 r = signature_element_length(p, &n);
3597 r = bus_gvariant_is_fixed_size(t);
3602 if (r == 0 && p[n] != 0) /* except the last item */
3609 if (size < n_variable * sz)
3612 where = m->rindex + size - (n_variable * sz);
3613 r = message_peek_body(m, &where, 1, n_variable * sz, &q);
3619 *offsets = new(size_t, n_total);
3625 /* Second, loop again and build an offset table */
3631 r = signature_element_length(p, &n);
3640 k = bus_gvariant_get_size(t);
3648 x = read_word_le((uint8_t*) q + v*sz, sz);
3651 if (m->rindex + x < previous)
3654 /* The last item's end
3655 * is determined from
3658 x = size - (n_variable * sz);
3660 offset = m->rindex + x;
3666 align = bus_gvariant_get_alignment(t);
3669 offset = (*n_offsets == 0 ? m->rindex : ALIGN_TO((*offsets)[*n_offsets-1], align)) + k;
3673 previous = (*offsets)[(*n_offsets)++] = offset;
3678 assert(*n_offsets == n_total);
3680 *item_size = (*offsets)[0] - m->rindex;
3684 static int enter_struct_or_dict_entry(
3686 struct bus_container *c,
3687 const char *contents,
3690 size_t *n_offsets) {
3701 if (!BUS_MESSAGE_IS_GVARIANT(m)) {
3704 r = message_peek_body(m, &m->rindex, 8, 0, NULL);
3708 } else if (c->item_size <= 0) {
3710 /* gvariant empty struct */
3715 /* gvariant with contents */
3716 return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets);
3721 static int bus_message_enter_struct(
3723 struct bus_container *c,
3724 const char *contents,
3727 size_t *n_offsets) {
3739 if (!signature_is_valid(contents, false))
3742 if (!c->signature || c->signature[c->index] == 0)
3745 l = strlen(contents);
3747 if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN ||
3748 !startswith(c->signature + c->index + 1, contents) ||
3749 c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END)
3752 r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets);
3756 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3757 c->index += 1 + l + 1;
3762 static int bus_message_enter_dict_entry(
3764 struct bus_container *c,
3765 const char *contents,
3768 size_t *n_offsets) {
3777 if (!signature_is_pair(contents))
3780 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3783 if (!c->signature || c->signature[c->index] == 0)
3786 l = strlen(contents);
3788 if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN ||
3789 !startswith(c->signature + c->index + 1, contents) ||
3790 c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END)
3793 r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets);
3797 if (c->enclosing != SD_BUS_TYPE_ARRAY)
3798 c->index += 1 + l + 1;
3803 _public_ int sd_bus_message_enter_container(sd_bus_message *m,
3805 const char *contents) {
3806 struct bus_container *c, *w;
3807 uint32_t *array_size = NULL;
3810 size_t *offsets = NULL;
3811 size_t n_offsets = 0, item_size = 0;
3814 assert_return(m, -EINVAL);
3815 assert_return(m->sealed, -EPERM);
3816 assert_return(type != 0 || !contents, -EINVAL);
3818 if (type == 0 || !contents) {
3822 /* Allow entering into anonymous containers */
3823 r = sd_bus_message_peek_type(m, &tt, &cc);
3827 if (type != 0 && type != tt)
3830 if (contents && !streq(contents, cc))
3838 * We enforce a global limit on container depth, that is much
3839 * higher than the 32 structs and 32 arrays the specification
3840 * mandates. This is simpler to implement for us, and we need
3841 * this only to ensure our container array doesn't grow
3842 * without bounds. We are happy to return any data from a
3843 * message as long as the data itself is valid, even if the
3844 * overall message might be not.
3846 * Note that the message signature is validated when
3847 * parsing the headers, and that validation does check the
3850 * Note that the specification defines no limits on the depth
3851 * of stacked variants, but we do.
3853 if (m->n_containers >= BUS_CONTAINER_DEPTH)
3856 w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
3861 if (message_end_of_signature(m))
3864 if (message_end_of_array(m, m->rindex))
3867 c = message_get_container(m);
3869 signature = strdup(contents);
3873 c->saved_index = c->index;
3876 if (type == SD_BUS_TYPE_ARRAY)
3877 r = bus_message_enter_array(m, c, contents, &array_size, &item_size, &offsets, &n_offsets);
3878 else if (type == SD_BUS_TYPE_VARIANT)
3879 r = bus_message_enter_variant(m, c, contents, &item_size);
3880 else if (type == SD_BUS_TYPE_STRUCT)
3881 r = bus_message_enter_struct(m, c, contents, &item_size, &offsets, &n_offsets);
3882 else if (type == SD_BUS_TYPE_DICT_ENTRY)
3883 r = bus_message_enter_dict_entry(m, c, contents, &item_size, &offsets, &n_offsets);
3893 /* OK, let's fill it in */
3894 w += m->n_containers++;
3895 w->enclosing = type;
3896 w->signature = signature;
3900 w->begin = m->rindex;
3901 w->end = m->rindex + c->item_size;
3903 w->array_size = array_size;
3904 w->item_size = item_size;
3905 w->offsets = offsets;
3906 w->n_offsets = n_offsets;
3907 w->offset_index = 0;
3912 _public_ int sd_bus_message_exit_container(sd_bus_message *m) {
3913 struct bus_container *c;
3916 assert_return(m, -EINVAL);
3917 assert_return(m->sealed, -EPERM);
3918 assert_return(m->n_containers > 0, -ENXIO);
3920 c = message_get_container(m);
3922 if (c->enclosing != SD_BUS_TYPE_ARRAY) {
3923 if (c->signature && c->signature[c->index] != 0)
3927 if (BUS_MESSAGE_IS_GVARIANT(m)) {
3928 if (m->rindex < c->end)
3931 } else if (c->enclosing == SD_BUS_TYPE_ARRAY) {
3934 l = BUS_MESSAGE_BSWAP32(m, *c->array_size);
3935 if (c->begin + l != m->rindex)
3943 c = message_get_container(m);
3945 r = container_next_item(m, c, &m->rindex);
3952 static void message_quit_container(sd_bus_message *m) {
3953 struct bus_container *c;
3957 assert(m->n_containers > 0);
3959 c = message_get_container(m);
3962 assert(m->rindex >= c->before);
3963 m->rindex = c->before;
3965 /* Free container */
3970 /* Correct index of new top-level container */
3971 c = message_get_container(m);
3972 c->index = c->saved_index;
3975 _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) {
3976 struct bus_container *c;
3979 assert_return(m, -EINVAL);
3980 assert_return(m->sealed, -EPERM);
3982 if (message_end_of_signature(m))
3985 if (message_end_of_array(m, m->rindex))
3988 c = message_get_container(m);
3990 if (bus_type_is_basic(c->signature[c->index])) {
3994 *type = c->signature[c->index];
3998 if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) {
4004 r = signature_element_length(c->signature+c->index+1, &l);
4010 sig = strndup(c->signature + c->index + 1, l);
4014 free(m->peeked_signature);
4015 m->peeked_signature = sig;
4021 *type = SD_BUS_TYPE_ARRAY;
4026 if (c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ||
4027 c->signature[c->index] == SD_BUS_TYPE_DICT_ENTRY_BEGIN) {
4033 r = signature_element_length(c->signature+c->index, &l);
4038 sig = strndup(c->signature + c->index + 1, l - 2);
4042 free(m->peeked_signature);
4043 m->peeked_signature = sig;
4049 *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY;
4054 if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) {
4058 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4061 if (c->item_size < 2)
4064 /* Look for the NUL delimiter that
4065 separates the payload from the
4066 signature. Since the body might be
4067 in a different part that then the
4068 signature we map byte by byte. */
4070 for (k = 2; k <= c->item_size; k++) {
4073 where = m->rindex + c->item_size - k;
4074 r = message_peek_body(m, &where, 1, k, &q);
4078 if (*(char*) q == 0)
4082 if (k > c->item_size)
4085 free(m->peeked_signature);
4086 m->peeked_signature = strndup((char*) q + 1, k - 1);
4087 if (!m->peeked_signature)
4090 if (!signature_is_valid(m->peeked_signature, true))
4093 *contents = m->peeked_signature;
4098 r = message_peek_body(m, &rindex, 1, 1, &q);
4103 r = message_peek_body(m, &rindex, 1, l+1, &q);
4107 if (!validate_signature(q, l))
4115 *type = SD_BUS_TYPE_VARIANT;
4130 _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) {
4131 struct bus_container *c;
4133 assert_return(m, -EINVAL);
4134 assert_return(m->sealed, -EPERM);
4137 message_reset_containers(m);
4140 c = message_get_container(m);
4142 c = message_get_container(m);
4144 c->offset_index = 0;
4146 m->rindex = c->begin;
4149 return !isempty(c->signature);
4152 static int message_read_ap(
4157 unsigned n_array, n_struct;
4158 TypeStack stack[BUS_CONTAINER_DEPTH];
4159 unsigned stack_ptr = 0;
4160 unsigned n_loop = 0;
4168 /* Ideally, we'd just call ourselves recursively on every
4169 * complex type. However, the state of a va_list that is
4170 * passed to a function is undefined after that function
4171 * returns. This means we need to docode the va_list linearly
4172 * in a single stackframe. We hence implement our own
4173 * home-grown stack in an array. */
4175 n_array = (unsigned) -1; /* lenght of current array entries */
4176 n_struct = strlen(types); /* length of current struct contents signature */
4183 if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) {
4184 r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array);
4190 r = sd_bus_message_exit_container(m);
4198 if (n_array != (unsigned) -1)
4207 case SD_BUS_TYPE_BYTE:
4208 case SD_BUS_TYPE_BOOLEAN:
4209 case SD_BUS_TYPE_INT16:
4210 case SD_BUS_TYPE_UINT16:
4211 case SD_BUS_TYPE_INT32:
4212 case SD_BUS_TYPE_UINT32:
4213 case SD_BUS_TYPE_INT64:
4214 case SD_BUS_TYPE_UINT64:
4215 case SD_BUS_TYPE_DOUBLE:
4216 case SD_BUS_TYPE_STRING:
4217 case SD_BUS_TYPE_OBJECT_PATH:
4218 case SD_BUS_TYPE_SIGNATURE:
4219 case SD_BUS_TYPE_UNIX_FD: {
4222 p = va_arg(ap, void*);
4223 r = sd_bus_message_read_basic(m, *t, p);
4236 case SD_BUS_TYPE_ARRAY: {
4239 r = signature_element_length(t + 1, &k);
4245 memcpy(s, t + 1, k);
4248 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s);
4259 if (n_array == (unsigned) -1) {
4264 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
4270 n_array = va_arg(ap, unsigned);
4275 case SD_BUS_TYPE_VARIANT: {
4278 s = va_arg(ap, const char *);
4282 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s);
4292 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
4297 n_struct = strlen(s);
4298 n_array = (unsigned) -1;
4303 case SD_BUS_TYPE_STRUCT_BEGIN:
4304 case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
4307 r = signature_element_length(t, &k);
4313 memcpy(s, t + 1, k - 2);
4316 r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
4326 if (n_array == (unsigned) -1) {
4331 r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
4337 n_array = (unsigned) -1;
4350 _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) {
4354 assert_return(m, -EINVAL);
4355 assert_return(m->sealed, -EPERM);
4356 assert_return(types, -EINVAL);
4358 va_start(ap, types);
4359 r = message_read_ap(m, types, ap);
4365 _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) {
4368 assert_return(m, -EINVAL);
4369 assert_return(m->sealed, -EPERM);
4370 assert_return(types, -EINVAL);
4377 case SD_BUS_TYPE_BYTE:
4378 case SD_BUS_TYPE_BOOLEAN:
4379 case SD_BUS_TYPE_INT16:
4380 case SD_BUS_TYPE_UINT16:
4381 case SD_BUS_TYPE_INT32:
4382 case SD_BUS_TYPE_UINT32:
4383 case SD_BUS_TYPE_INT64:
4384 case SD_BUS_TYPE_UINT64:
4385 case SD_BUS_TYPE_DOUBLE:
4386 case SD_BUS_TYPE_STRING:
4387 case SD_BUS_TYPE_OBJECT_PATH:
4388 case SD_BUS_TYPE_SIGNATURE:
4389 case SD_BUS_TYPE_UNIX_FD:
4391 r = sd_bus_message_read_basic(m, *types, NULL);
4395 r = sd_bus_message_skip(m, types + 1);
4401 case SD_BUS_TYPE_ARRAY: {
4404 r = signature_element_length(types + 1, &k);
4410 memcpy(s, types+1, k);
4413 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s);
4418 r = sd_bus_message_skip(m, s);
4425 r = sd_bus_message_exit_container(m);
4430 r = sd_bus_message_skip(m, types + 1 + k);
4437 case SD_BUS_TYPE_VARIANT: {
4438 const char *contents;
4441 r = sd_bus_message_peek_type(m, &x, &contents);
4445 if (x != SD_BUS_TYPE_VARIANT)
4448 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
4452 r = sd_bus_message_skip(m, contents);
4457 r = sd_bus_message_exit_container(m);
4461 r = sd_bus_message_skip(m, types + 1);
4468 case SD_BUS_TYPE_STRUCT_BEGIN:
4469 case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
4472 r = signature_element_length(types, &k);
4478 memcpy(s, types+1, k-2);
4481 r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
4485 r = sd_bus_message_skip(m, s);
4490 r = sd_bus_message_exit_container(m);
4495 r = sd_bus_message_skip(m, types + k);
4507 _public_ int sd_bus_message_read_array(sd_bus_message *m,
4511 struct bus_container *c;
4517 assert_return(m, -EINVAL);
4518 assert_return(m->sealed, -EPERM);
4519 assert_return(bus_type_is_trivial(type), -EINVAL);
4520 assert_return(ptr, -EINVAL);
4521 assert_return(size, -EINVAL);
4522 assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -ENOTSUP);
4524 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
4528 c = message_get_container(m);
4530 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4531 align = bus_gvariant_get_alignment(CHAR_TO_STR(type));
4535 sz = c->end - c->begin;
4537 align = bus_type_get_alignment(type);
4541 sz = BUS_MESSAGE_BSWAP32(m, *c->array_size);
4545 /* Zero length array, let's return some aligned
4546 * pointer that is not NULL */
4547 p = (uint8_t*) NULL + align;
4549 r = message_peek_body(m, &m->rindex, align, sz, &p);
4554 r = sd_bus_message_exit_container(m);
4558 *ptr = (const void*) p;
4564 message_quit_container(m);
4568 static int message_peek_fields(
4579 return buffer_peek(BUS_MESSAGE_FIELDS(m), BUS_MESSAGE_FIELDS_SIZE(m), rindex, align, nbytes, ret);
4582 static int message_peek_field_uint32(
4594 if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 4)
4597 /* identical for gvariant and dbus1 */
4599 r = message_peek_fields(m, ri, 4, 4, &q);
4604 *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
4609 static int message_peek_field_string(
4611 bool (*validate)(const char *p),
4623 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4628 r = message_peek_fields(m, ri, 1, item_size, &q);
4634 r = message_peek_field_uint32(m, ri, 4, &l);
4638 r = message_peek_fields(m, ri, 1, l+1, &q);
4644 if (!validate_nul(q, l))
4650 if (!validate_string(q, l))
4660 static int message_peek_field_signature(
4673 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4678 r = message_peek_fields(m, ri, 1, item_size, &q);
4684 r = message_peek_fields(m, ri, 1, 1, &q);
4689 r = message_peek_fields(m, ri, 1, l+1, &q);
4694 if (!validate_signature(q, l))
4703 static int message_skip_fields(
4706 uint32_t array_size,
4707 const char **signature) {
4709 size_t original_index;
4715 assert(!BUS_MESSAGE_IS_GVARIANT(m));
4717 original_index = *ri;
4723 if (array_size != (uint32_t) -1 &&
4724 array_size <= *ri - original_index)
4731 if (t == SD_BUS_TYPE_STRING) {
4733 r = message_peek_field_string(m, NULL, ri, 0, NULL);
4739 } else if (t == SD_BUS_TYPE_OBJECT_PATH) {
4741 r = message_peek_field_string(m, object_path_is_valid, ri, 0, NULL);
4747 } else if (t == SD_BUS_TYPE_SIGNATURE) {
4749 r = message_peek_field_signature(m, ri, 0, NULL);
4755 } else if (bus_type_is_basic(t)) {
4758 align = bus_type_get_alignment(t);
4759 k = bus_type_get_size(t);
4760 assert(align > 0 && k > 0);
4762 r = message_peek_fields(m, ri, align, k, NULL);
4768 } else if (t == SD_BUS_TYPE_ARRAY) {
4770 r = signature_element_length(*signature+1, &l);
4780 strncpy(sig, *signature + 1, l-1);
4783 alignment = bus_type_get_alignment(sig[0]);
4787 r = message_peek_field_uint32(m, ri, 0, &nas);
4790 if (nas > BUS_ARRAY_MAX_SIZE)
4793 r = message_peek_fields(m, ri, alignment, 0, NULL);
4797 r = message_skip_fields(m, ri, nas, (const char**) &s);
4802 (*signature) += 1 + l;
4804 } else if (t == SD_BUS_TYPE_VARIANT) {
4807 r = message_peek_field_signature(m, ri, 0, &s);
4811 r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s);
4817 } else if (t == SD_BUS_TYPE_STRUCT ||
4818 t == SD_BUS_TYPE_DICT_ENTRY) {
4820 r = signature_element_length(*signature, &l);
4827 strncpy(sig, *signature + 1, l-1);
4830 r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s);
4841 int bus_message_parse_fields(sd_bus_message *m) {
4844 uint32_t unix_fds = 0;
4845 void *offsets = NULL;
4846 unsigned n_offsets = 0;
4852 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4855 sz = determine_word_size(BUS_MESSAGE_FIELDS_SIZE(m), 0);
4859 ri = BUS_MESSAGE_FIELDS_SIZE(m) - sz;
4860 r = message_peek_fields(m, &ri, 1, sz, &q);
4864 framing = read_word_le(q, sz);
4865 if (framing >= BUS_MESSAGE_FIELDS_SIZE(m) - sz)
4867 if ((BUS_MESSAGE_FIELDS_SIZE(m) - framing) % sz != 0)
4871 r = message_peek_fields(m, &ri, 1, BUS_MESSAGE_FIELDS_SIZE(m) - framing, &offsets);
4875 n_offsets = (BUS_MESSAGE_FIELDS_SIZE(m) - framing) / sz;
4880 while (ri < BUS_MESSAGE_FIELDS_SIZE(m)) {
4881 _cleanup_free_ char *sig = NULL;
4882 const char *signature;
4884 size_t item_size = (size_t) -1;
4886 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4893 ri = ALIGN_TO(read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8);
4896 r = message_peek_fields(m, &ri, 8, 1, (void**) &header);
4900 if (BUS_MESSAGE_IS_GVARIANT(m)) {
4905 end = read_word_le((uint8_t*) offsets + i*sz, sz);
4910 where = ri = ALIGN_TO(ri, 8);
4911 item_size = end - ri;
4912 r = message_peek_fields(m, &where, 1, item_size, &q);
4916 b = memrchr(q, 0, item_size);
4920 sig = strndup(b+1, item_size - (b+1-(char*) q));
4925 item_size = b - (char*) q;
4927 r = message_peek_field_signature(m, &ri, 0, &signature);
4933 case _BUS_MESSAGE_HEADER_INVALID:
4936 case BUS_MESSAGE_HEADER_PATH:
4941 if (!streq(signature, "o"))
4944 r = message_peek_field_string(m, object_path_is_valid, &ri, item_size, &m->path);
4947 case BUS_MESSAGE_HEADER_INTERFACE:
4952 if (!streq(signature, "s"))
4955 r = message_peek_field_string(m, interface_name_is_valid, &ri, item_size, &m->interface);
4958 case BUS_MESSAGE_HEADER_MEMBER:
4963 if (!streq(signature, "s"))
4966 r = message_peek_field_string(m, member_name_is_valid, &ri, item_size, &m->member);
4969 case BUS_MESSAGE_HEADER_ERROR_NAME:
4974 if (!streq(signature, "s"))
4977 r = message_peek_field_string(m, error_name_is_valid, &ri, item_size, &m->error.name);
4979 m->error._need_free = -1;
4983 case BUS_MESSAGE_HEADER_DESTINATION:
4988 if (!streq(signature, "s"))
4991 r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->destination);
4994 case BUS_MESSAGE_HEADER_SENDER:
4999 if (!streq(signature, "s"))
5002 r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->sender);
5004 if (r >= 0 && m->sender[0] == ':' && m->bus && m->bus->bus_client && !m->bus->is_kernel) {
5005 m->creds.unique_name = (char*) m->sender;
5006 m->creds.mask |= SD_BUS_CREDS_UNIQUE_NAME & m->bus->creds_mask;
5012 case BUS_MESSAGE_HEADER_SIGNATURE: {
5016 if (m->root_container.signature)
5019 if (!streq(signature, "g"))
5022 r = message_peek_field_signature(m, &ri, item_size, &s);
5030 free(m->root_container.signature);
5031 m->root_container.signature = c;
5035 case BUS_MESSAGE_HEADER_REPLY_SERIAL:
5036 if (m->reply_serial != 0)
5039 if (!streq(signature, "u"))
5042 r = message_peek_field_uint32(m, &ri, item_size, &m->reply_serial);
5046 if (m->reply_serial == 0)
5051 case BUS_MESSAGE_HEADER_UNIX_FDS:
5055 if (!streq(signature, "u"))
5058 r = message_peek_field_uint32(m, &ri, item_size, &unix_fds);
5068 if (!BUS_MESSAGE_IS_GVARIANT(m))
5069 r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature);
5078 if (m->n_fds != unix_fds)
5081 if (isempty(m->root_container.signature) != (BUS_MESSAGE_BODY_SIZE(m) == 0))
5084 switch (m->header->type) {
5086 case SD_BUS_MESSAGE_SIGNAL:
5087 if (!m->path || !m->interface || !m->member)
5091 case SD_BUS_MESSAGE_METHOD_CALL:
5093 if (!m->path || !m->member)
5098 case SD_BUS_MESSAGE_METHOD_RETURN:
5100 if (m->reply_serial == 0)
5104 case SD_BUS_MESSAGE_METHOD_ERROR:
5106 if (m->reply_serial == 0 || !m->error.name)
5111 m->root_container.end = BUS_MESSAGE_BODY_SIZE(m);
5113 if (BUS_MESSAGE_IS_GVARIANT(m)) {
5114 r = build_struct_offsets(
5116 m->root_container.signature,
5117 BUS_MESSAGE_BODY_SIZE(m),
5118 &m->root_container.item_size,
5119 &m->root_container.offsets,
5120 &m->root_container.n_offsets);
5125 /* Try to read the error message, but if we can't it's a non-issue */
5126 if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR)
5127 sd_bus_message_read(m, "s", &m->error.message);
5132 _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) {
5133 assert_return(m, -EINVAL);
5134 assert_return(destination, -EINVAL);
5135 assert_return(!m->sealed, -EPERM);
5136 assert_return(!m->destination, -EEXIST);
5138 return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination);
5141 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
5145 struct bus_body_part *part;
5151 total = BUS_MESSAGE_SIZE(m);
5157 e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m));
5158 MESSAGE_FOREACH_PART(part, i, m)
5159 e = mempcpy(e, part->data, part->size);
5161 assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p));
5169 int bus_message_read_strv_extend(sd_bus_message *m, char ***l) {
5175 r = sd_bus_message_enter_container(m, 'a', "s");
5182 r = sd_bus_message_read_basic(m, 's', &s);
5188 r = strv_extend(l, s);
5193 r = sd_bus_message_exit_container(m);
5200 _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) {
5204 assert_return(m, -EINVAL);
5205 assert_return(m->sealed, -EPERM);
5206 assert_return(l, -EINVAL);
5208 r = bus_message_read_strv_extend(m, &strv);
5218 const char* bus_message_get_arg(sd_bus_message *m, unsigned i) {
5220 const char *t = NULL;
5225 r = sd_bus_message_rewind(m, true);
5229 for (j = 0; j <= i; j++) {
5232 r = sd_bus_message_peek_type(m, &type, NULL);
5236 if (type != SD_BUS_TYPE_STRING &&
5237 type != SD_BUS_TYPE_OBJECT_PATH &&
5238 type != SD_BUS_TYPE_SIGNATURE)
5241 r = sd_bus_message_read_basic(m, type, &t);
5249 bool bus_header_is_complete(struct bus_header *h, size_t size) {
5255 if (size < sizeof(struct bus_header))
5258 full = sizeof(struct bus_header) +
5259 (h->endian == BUS_NATIVE_ENDIAN ? h->fields_size : bswap_32(h->fields_size));
5261 return size >= full;
5264 int bus_header_message_size(struct bus_header *h, size_t *sum) {
5270 if (h->endian == BUS_NATIVE_ENDIAN) {
5271 fs = h->fields_size;
5273 } else if (h->endian == BUS_REVERSE_ENDIAN) {
5274 fs = bswap_32(h->fields_size);
5275 bs = bswap_32(h->body_size);
5279 *sum = sizeof(struct bus_header) + ALIGN8(fs) + bs;
5283 _public_ int sd_bus_message_get_errno(sd_bus_message *m) {
5284 assert_return(m, -EINVAL);
5286 if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
5289 return sd_bus_error_get_errno(&m->error);
5292 _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) {
5293 struct bus_container *c;
5295 assert_return(m, NULL);
5297 c = complete ? &m->root_container : message_get_container(m);
5298 return strempty(c->signature);
5301 _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) {
5302 bool done_something = false;
5305 assert_return(m, -EINVAL);
5306 assert_return(source, -EINVAL);
5307 assert_return(!m->sealed, -EPERM);
5308 assert_return(source->sealed, -EPERM);
5311 const char *contents;
5326 r = sd_bus_message_peek_type(source, &type, &contents);
5332 done_something = true;
5334 if (bus_type_is_container(type) > 0) {
5336 r = sd_bus_message_enter_container(source, type, contents);
5340 r = sd_bus_message_open_container(m, type, contents);
5344 r = sd_bus_message_copy(m, source, true);
5348 r = sd_bus_message_close_container(m);
5352 r = sd_bus_message_exit_container(source);
5359 r = sd_bus_message_read_basic(source, type, &basic);
5365 if (type == SD_BUS_TYPE_OBJECT_PATH ||
5366 type == SD_BUS_TYPE_SIGNATURE ||
5367 type == SD_BUS_TYPE_STRING)
5368 r = sd_bus_message_append_basic(m, type, basic.string);
5370 r = sd_bus_message_append_basic(m, type, &basic);
5377 return done_something;
5380 _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) {
5385 assert_return(m, -EINVAL);
5386 assert_return(m->sealed, -EPERM);
5387 assert_return(!type || bus_type_is_valid(type), -EINVAL);
5388 assert_return(!contents || signature_is_valid(contents, true), -EINVAL);
5389 assert_return(type || contents, -EINVAL);
5390 assert_return(!contents || !type || bus_type_is_container(type), -EINVAL);
5392 r = sd_bus_message_peek_type(m, &t, &c);
5396 if (type != 0 && type != t)
5399 if (contents && !streq_ptr(contents, c))
5405 _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) {
5406 assert_return(m, NULL);