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/>.
22 #ifdef HAVE_VALGRIND_MEMCHECK_H
23 #include <valgrind/memcheck.h>
31 #include "bus-internal.h"
32 #include "bus-message.h"
33 #include "bus-control.h"
34 #include "bus-bloom.h"
37 _public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
40 assert_return(bus, -EINVAL);
41 assert_return(unique, -EINVAL);
42 assert_return(!bus_pid_changed(bus), -ECHILD);
44 r = bus_ensure_running(bus);
48 *unique = bus->unique_name;
52 static int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags) {
53 struct kdbus_cmd_name *n;
61 size = offsetof(struct kdbus_cmd_name, name) + l + 1;
64 kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);
65 memcpy(n->name, name, l+1);
67 #ifdef HAVE_VALGRIND_MEMCHECK_H
68 VALGRIND_MAKE_MEM_DEFINED(n, n->size);
71 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
75 if (n->flags & KDBUS_NAME_IN_QUEUE)
81 static int bus_request_name_dbus1(sd_bus *bus, const char *name, uint64_t flags) {
82 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
83 uint32_t ret, param = 0;
89 if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
90 param |= BUS_NAME_ALLOW_REPLACEMENT;
91 if (flags & SD_BUS_NAME_REPLACE_EXISTING)
92 param |= BUS_NAME_REPLACE_EXISTING;
93 if (!(flags & SD_BUS_NAME_QUEUE))
94 param |= BUS_NAME_DO_NOT_QUEUE;
96 r = sd_bus_call_method(
98 "org.freedesktop.DBus",
100 "org.freedesktop.DBus",
110 r = sd_bus_message_read(reply, "u", &ret);
114 if (ret == BUS_NAME_ALREADY_OWNER)
116 else if (ret == BUS_NAME_EXISTS)
118 else if (ret == BUS_NAME_IN_QUEUE)
120 else if (ret == BUS_NAME_PRIMARY_OWNER)
126 _public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags) {
127 assert_return(bus, -EINVAL);
128 assert_return(name, -EINVAL);
129 assert_return(bus->bus_client, -EINVAL);
130 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
131 assert_return(!bus_pid_changed(bus), -ECHILD);
132 assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL);
133 assert_return(service_name_is_valid(name), -EINVAL);
134 assert_return(name[0] != ':', -EINVAL);
137 return bus_request_name_kernel(bus, name, flags);
139 return bus_request_name_dbus1(bus, name, flags);
142 static int bus_release_name_kernel(sd_bus *bus, const char *name) {
143 struct kdbus_cmd_name *n;
151 n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
152 n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
153 memcpy(n->name, name, l+1);
155 #ifdef HAVE_VALGRIND_MEMCHECK_H
156 VALGRIND_MAKE_MEM_DEFINED(n, n->size);
158 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
165 static int bus_release_name_dbus1(sd_bus *bus, const char *name) {
166 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
173 r = sd_bus_call_method(
175 "org.freedesktop.DBus",
177 "org.freedesktop.DBus",
186 r = sd_bus_message_read(reply, "u", &ret);
189 if (ret == BUS_NAME_NON_EXISTENT)
191 if (ret == BUS_NAME_NOT_OWNER)
193 if (ret == BUS_NAME_RELEASED)
199 _public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
200 assert_return(bus, -EINVAL);
201 assert_return(name, -EINVAL);
202 assert_return(bus->bus_client, -EINVAL);
203 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
204 assert_return(!bus_pid_changed(bus), -ECHILD);
205 assert_return(service_name_is_valid(name), -EINVAL);
206 assert_return(name[0] != ':', -EINVAL);
209 return bus_release_name_kernel(bus, name);
211 return bus_release_name_dbus1(bus, name);
214 static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
215 struct kdbus_cmd_name_list cmd = {};
216 struct kdbus_name_list *name_list;
217 struct kdbus_cmd_name *name;
218 uint64_t previous_id = 0;
221 /* Caller will free half-constructed list on failure... */
225 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
229 name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
231 KDBUS_ITEM_FOREACH(name, name_list, names) {
233 if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->id != previous_id) {
236 if (asprintf(&n, ":1.%llu", (unsigned long long) name->id) < 0)
245 previous_id = name->id;
248 if (name->size > sizeof(*name) && service_name_is_valid(name->name)) {
249 r = strv_extend(x, name->name);
255 r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset);
262 static int bus_list_names_kernel(sd_bus *bus, char ***acquired, char ***activatable) {
263 _cleanup_strv_free_ char **x = NULL, **y = NULL;
267 r = kernel_get_list(bus, KDBUS_NAME_LIST_UNIQUE | KDBUS_NAME_LIST_NAMES, &x);
273 r = kernel_get_list(bus, KDBUS_NAME_LIST_ACTIVATORS, &y);
289 static int bus_list_names_dbus1(sd_bus *bus, char ***acquired, char ***activatable) {
290 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
291 _cleanup_strv_free_ char **x = NULL, **y = NULL;
295 r = sd_bus_call_method(
297 "org.freedesktop.DBus",
299 "org.freedesktop.DBus",
307 r = sd_bus_message_read_strv(reply, &x);
311 reply = sd_bus_message_unref(reply);
315 r = sd_bus_call_method(
317 "org.freedesktop.DBus",
319 "org.freedesktop.DBus",
320 "ListActivatableNames",
327 r = sd_bus_message_read_strv(reply, &y);
343 _public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) {
344 assert_return(bus, -EINVAL);
345 assert_return(acquired || activatable, -EINVAL);
346 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
347 assert_return(!bus_pid_changed(bus), -ECHILD);
350 return bus_list_names_kernel(bus, acquired, activatable);
352 return bus_list_names_dbus1(bus, acquired, activatable);
355 static int bus_get_owner_kdbus(
359 sd_bus_creds **creds) {
361 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
362 struct kdbus_cmd_conn_info *cmd;
363 struct kdbus_conn_info *conn_info;
364 struct kdbus_item *item;
369 r = bus_kernel_parse_unique_name(name, &id);
373 size = offsetof(struct kdbus_cmd_conn_info, name);
377 size = offsetof(struct kdbus_cmd_conn_info, name) + strlen(name) + 1;
379 strcpy(cmd->name, name);
381 cmd->flags = KDBUS_ATTACH_NAMES;
384 r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);
388 conn_info = (struct kdbus_conn_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
390 /* Non-activated names are considered not available */
391 if (conn_info->flags & KDBUS_HELLO_ACTIVATOR)
392 return name[0] == ':' ? -ENXIO : -ENOENT;
398 if (mask & SD_BUS_CREDS_UNIQUE_NAME) {
399 if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) conn_info->id) < 0)
402 c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
405 KDBUS_ITEM_FOREACH(item, conn_info, items) {
407 switch (item->type) {
409 case KDBUS_ITEM_CREDS:
410 m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID |
411 SD_BUS_CREDS_TID | SD_BUS_CREDS_PID_STARTTIME) & mask;
414 c->uid = item->creds.uid;
415 c->pid = item->creds.pid;
416 c->gid = item->creds.gid;
417 c->tid = item->creds.tid;
418 c->pid_starttime = item->creds.starttime;
423 case KDBUS_ITEM_PID_COMM:
424 if (mask & SD_BUS_CREDS_COMM) {
425 c->comm = strdup(item->str);
431 c->mask |= SD_BUS_CREDS_COMM;
435 case KDBUS_ITEM_TID_COMM:
436 if (mask & SD_BUS_CREDS_TID_COMM) {
437 c->tid_comm = strdup(item->str);
443 c->mask |= SD_BUS_CREDS_TID_COMM;
448 if (mask & SD_BUS_CREDS_EXE) {
449 c->exe = strdup(item->str);
455 c->mask |= SD_BUS_CREDS_EXE;
459 case KDBUS_ITEM_CMDLINE:
460 if (mask & SD_BUS_CREDS_CMDLINE) {
461 c->cmdline_size = item->size - KDBUS_ITEM_HEADER_SIZE;
462 c->cmdline = memdup(item->data, c->cmdline_size);
468 c->mask |= SD_BUS_CREDS_CMDLINE;
472 case KDBUS_ITEM_CGROUP:
473 m = (SD_BUS_CREDS_CGROUP | SD_BUS_CREDS_UNIT |
474 SD_BUS_CREDS_USER_UNIT | SD_BUS_CREDS_SLICE |
475 SD_BUS_CREDS_SESSION | SD_BUS_CREDS_OWNER_UID) & mask;
478 c->cgroup = strdup(item->str);
488 case KDBUS_ITEM_CAPS:
489 m = (SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_PERMITTED_CAPS |
490 SD_BUS_CREDS_INHERITABLE_CAPS | SD_BUS_CREDS_BOUNDING_CAPS) & mask;
493 c->capability_size = item->size - KDBUS_ITEM_HEADER_SIZE;
494 c->capability = memdup(item->data, c->capability_size);
495 if (!c->capability) {
504 case KDBUS_ITEM_SECLABEL:
505 if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
506 c->label = strdup(item->str);
512 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
516 case KDBUS_ITEM_AUDIT:
517 m = (SD_BUS_CREDS_AUDIT_SESSION_ID | SD_BUS_CREDS_AUDIT_LOGIN_UID) & mask;
520 c->audit_session_id = item->audit.sessionid;
521 c->audit_login_uid = item->audit.loginuid;
526 case KDBUS_ITEM_NAME:
527 if ((mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) && service_name_is_valid(item->name.name)) {
528 r = strv_extend(&c->well_known_names, item->name.name);
532 c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
546 ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);
550 static int bus_get_owner_dbus1(
554 sd_bus_creds **creds) {
556 _cleanup_bus_message_unref_ sd_bus_message *reply_unique = NULL, *reply = NULL;
557 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
558 const char *unique = NULL;
562 /* Only query the owner if the caller wants to know it or if
563 * the caller just wants to check whether a name exists */
564 if ((mask & SD_BUS_CREDS_UNIQUE_NAME) || mask == 0) {
565 r = sd_bus_call_method(
567 "org.freedesktop.DBus",
569 "org.freedesktop.DBus",
578 r = sd_bus_message_read(reply_unique, "s", &unique);
588 if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {
589 c->unique_name = strdup(unique);
593 c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
596 if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_GID|
597 SD_BUS_CREDS_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE|
598 SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|
599 SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS|
600 SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) {
603 r = sd_bus_call_method(
605 "org.freedesktop.DBus",
607 "org.freedesktop.DBus",
608 "GetConnectionUnixProcessID",
612 unique ? unique : name);
616 r = sd_bus_message_read(reply, "u", &u);
621 if (mask & SD_BUS_CREDS_PID) {
623 c->mask |= SD_BUS_CREDS_PID;
626 reply = sd_bus_message_unref(reply);
629 if (mask & SD_BUS_CREDS_UID) {
632 r = sd_bus_call_method(
634 "org.freedesktop.DBus",
636 "org.freedesktop.DBus",
637 "GetConnectionUnixUser",
641 unique ? unique : name);
645 r = sd_bus_message_read(reply, "u", &u);
650 c->mask |= SD_BUS_CREDS_UID;
652 reply = sd_bus_message_unref(reply);
655 if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
659 r = sd_bus_call_method(
661 "org.freedesktop.DBus",
663 "org.freedesktop.DBus",
664 "GetConnectionSELinuxSecurityContext",
668 unique ? unique : name);
672 r = sd_bus_message_read_array(reply, 'y', &p, &sz);
676 c->label = strndup(p, sz);
680 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
683 r = bus_creds_add_more(c, mask, pid, 0);
696 _public_ int sd_bus_get_owner(
700 sd_bus_creds **creds) {
702 assert_return(bus, -EINVAL);
703 assert_return(name, -EINVAL);
704 assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);
705 assert_return(mask == 0 || creds, -EINVAL);
706 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
707 assert_return(!bus_pid_changed(bus), -ECHILD);
708 assert_return(service_name_is_valid(name), -EINVAL);
709 assert_return(bus->bus_client, -ENODATA);
712 return bus_get_owner_kdbus(bus, name, mask, creds);
714 return bus_get_owner_dbus1(bus, name, mask, creds);
717 static int add_name_change_match(sd_bus *bus,
720 const char *old_owner,
721 const char *new_owner) {
723 uint64_t name_id = KDBUS_MATCH_ID_ANY, old_owner_id = 0, new_owner_id = 0;
724 int is_name_id = -1, r;
725 struct kdbus_item *item;
729 /* If we encounter a match that could match against
730 * NameOwnerChanged messages, then we need to create
731 * KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE} and
732 * KDBUS_ITEM_ID_{ADD,REMOVE} matches for it, possibly
733 * multiple if the match is underspecified.
735 * The NameOwnerChanged signals take three parameters with
736 * unique or well-known names, but only some forms actually
739 * WELLKNOWN, "", UNIQUE → KDBUS_ITEM_NAME_ADD
740 * WELLKNOWN, UNIQUE, "" → KDBUS_ITEM_NAME_REMOVE
741 * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_ITEM_NAME_CHANGE
742 * UNIQUE, "", UNIQUE → KDBUS_ITEM_ID_ADD
743 * UNIQUE, UNIQUE, "" → KDBUS_ITEM_ID_REMOVE
745 * For the latter two the two unique names must be identical.
750 is_name_id = bus_kernel_parse_unique_name(name, &name_id);
755 if (!isempty(old_owner)) {
756 r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
761 if (is_name_id > 0 && old_owner_id != name_id)
764 old_owner_id = KDBUS_MATCH_ID_ANY;
766 if (!isempty(new_owner)) {
767 r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
772 if (is_name_id > 0 && new_owner_id != name_id)
775 new_owner_id = KDBUS_MATCH_ID_ANY;
777 if (is_name_id <= 0) {
778 struct kdbus_cmd_match *m;
781 /* If the name argument is missing or is a well-known
782 * name, then add KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE}
785 l = name ? strlen(name) + 1 : 0;
787 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
788 offsetof(struct kdbus_item, name_change) +
789 offsetof(struct kdbus_notify_name_change, name) +
798 offsetof(struct kdbus_item, name_change) +
799 offsetof(struct kdbus_notify_name_change, name) +
802 item->name_change.old.id = old_owner_id;
803 item->name_change.new.id = new_owner_id;
806 strcpy(item->name_change.name, name);
808 /* If the old name is unset or empty, then
809 * this can match against added names */
810 if (!old_owner || old_owner[0] == 0) {
811 item->type = KDBUS_ITEM_NAME_ADD;
813 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
818 /* If the new name is unset or empty, then
819 * this can match against removed names */
820 if (!new_owner || new_owner[0] == 0) {
821 item->type = KDBUS_ITEM_NAME_REMOVE;
823 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
828 /* The CHANGE match we need in either case, because
829 * what is reported as a name change by the kernel
830 * might just be an owner change between starter and
831 * normal clients. For userspace such a change should
832 * be considered a removal/addition, hence let's
833 * subscribe to this unconditionally. */
834 item->type = KDBUS_ITEM_NAME_CHANGE;
835 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
840 if (is_name_id != 0) {
841 struct kdbus_cmd_match *m;
844 /* If the name argument is missing or is a unique
845 * name, then add KDBUS_ITEM_ID_{ADD,REMOVE} matches
848 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
849 offsetof(struct kdbus_item, id_change) +
850 sizeof(struct kdbus_notify_id_change));
857 item->size = offsetof(struct kdbus_item, id_change) + sizeof(struct kdbus_notify_id_change);
858 item->id_change.id = name_id;
860 /* If the old name is unset or empty, then this can
861 * match against added ids */
862 if (!old_owner || old_owner[0] == 0) {
863 item->type = KDBUS_ITEM_ID_ADD;
865 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
870 /* If thew new name is unset or empty, then this can
871 * match against removed ids */
872 if (!new_owner || new_owner[0] == 0) {
873 item->type = KDBUS_ITEM_ID_REMOVE;
875 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
884 int bus_add_match_internal_kernel(
887 struct bus_match_component *components,
888 unsigned n_components,
891 struct kdbus_cmd_match *m;
892 struct kdbus_item *item;
893 uint64_t bloom[BLOOM_SIZE/8];
895 const char *sender = NULL;
896 size_t sender_length = 0;
897 uint64_t src_id = KDBUS_MATCH_ID_ANY;
898 bool using_bloom = false;
900 bool matches_name_change = true;
901 const char *name_change_arg[3] = {};
908 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
909 offsetof(struct kdbus_item, id) + sizeof(uint64_t));
911 for (i = 0; i < n_components; i++) {
912 struct bus_match_component *c = &components[i];
916 case BUS_MATCH_SENDER:
917 if (!streq(c->value_str, "org.freedesktop.DBus"))
918 matches_name_change = false;
920 r = bus_kernel_parse_unique_name(c->value_str, &src_id);
925 sender = c->value_str;
926 sender_length = strlen(sender);
927 sz += ALIGN8(offsetof(struct kdbus_item, str) + sender_length + 1);
932 case BUS_MATCH_MESSAGE_TYPE:
933 if (c->value_u8 != SD_BUS_MESSAGE_SIGNAL)
934 matches_name_change = false;
936 bloom_add_pair(bloom, "message-type", bus_message_type_to_string(c->value_u8));
940 case BUS_MATCH_INTERFACE:
941 if (!streq(c->value_str, "org.freedesktop.DBus"))
942 matches_name_change = false;
944 bloom_add_pair(bloom, "interface", c->value_str);
948 case BUS_MATCH_MEMBER:
949 if (!streq(c->value_str, "NameOwnerChanged"))
950 matches_name_change = false;
952 bloom_add_pair(bloom, "member", c->value_str);
957 if (!streq(c->value_str, "/org/freedesktop/DBus"))
958 matches_name_change = false;
960 bloom_add_pair(bloom, "path", c->value_str);
964 case BUS_MATCH_PATH_NAMESPACE:
965 if (!streq(c->value_str, "/")) {
966 bloom_add_pair(bloom, "path-slash-prefix", c->value_str);
971 case BUS_MATCH_ARG...BUS_MATCH_ARG_LAST: {
972 char buf[sizeof("arg")-1 + 2 + 1];
974 if (c->type - BUS_MATCH_ARG < 3)
975 name_change_arg[c->type - BUS_MATCH_ARG] = c->value_str;
977 snprintf(buf, sizeof(buf), "arg%u", c->type - BUS_MATCH_ARG);
978 bloom_add_pair(bloom, buf, c->value_str);
983 case BUS_MATCH_ARG_PATH...BUS_MATCH_ARG_PATH_LAST: {
984 char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
986 snprintf(buf, sizeof(buf), "arg%u-slash-prefix", c->type - BUS_MATCH_ARG_PATH);
987 bloom_add_pair(bloom, buf, c->value_str);
992 case BUS_MATCH_ARG_NAMESPACE...BUS_MATCH_ARG_NAMESPACE_LAST: {
993 char buf[sizeof("arg")-1 + 2 + sizeof("-dot-prefix")];
995 snprintf(buf, sizeof(buf), "arg%u-dot-prefix", c->type - BUS_MATCH_ARG_NAMESPACE);
996 bloom_add_pair(bloom, buf, c->value_str);
1001 case BUS_MATCH_DESTINATION:
1002 /* The bloom filter does not include
1003 the destination, since it is only
1004 available for broadcast messages
1005 which do not carry a destination
1006 since they are undirected. */
1009 case BUS_MATCH_ROOT:
1010 case BUS_MATCH_VALUE:
1011 case BUS_MATCH_LEAF:
1012 case _BUS_MATCH_NODE_TYPE_MAX:
1013 case _BUS_MATCH_NODE_TYPE_INVALID:
1014 assert_not_reached("Invalid match type?");
1019 sz += ALIGN8(offsetof(struct kdbus_item, data64) + BLOOM_SIZE);
1027 item->size = offsetof(struct kdbus_item, id) + sizeof(uint64_t);
1028 item->type = KDBUS_ITEM_ID;
1032 item = KDBUS_ITEM_NEXT(item);
1033 item->size = offsetof(struct kdbus_item, data64) + BLOOM_SIZE;
1034 item->type = KDBUS_ITEM_BLOOM;
1035 memcpy(item->data64, bloom, BLOOM_SIZE);
1039 item = KDBUS_ITEM_NEXT(item);
1040 item->size = offsetof(struct kdbus_item, str) + sender_length + 1;
1041 item->type = KDBUS_ITEM_NAME;
1042 memcpy(item->str, sender, sender_length + 1);
1045 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
1049 if (matches_name_change) {
1051 /* If this match could theoretically match
1052 * NameOwnerChanged messages, we need to
1053 * install a second non-bloom filter explitly
1056 r = add_name_change_match(bus, cookie, name_change_arg[0], name_change_arg[1], name_change_arg[2]);
1064 static int bus_add_match_internal_dbus1(
1066 const char *match) {
1071 return sd_bus_call_method(
1073 "org.freedesktop.DBus",
1075 "org.freedesktop.DBus",
1083 int bus_add_match_internal(
1086 struct bus_match_component *components,
1087 unsigned n_components,
1094 return bus_add_match_internal_kernel(bus, 0, components, n_components, cookie);
1096 return bus_add_match_internal_dbus1(bus, match);
1099 int bus_remove_match_internal_kernel(
1104 struct kdbus_cmd_match m;
1110 m.size = offsetof(struct kdbus_cmd_match, items);
1114 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
1121 static int bus_remove_match_internal_dbus1(
1123 const char *match) {
1128 return sd_bus_call_method(
1130 "org.freedesktop.DBus",
1132 "org.freedesktop.DBus",
1140 int bus_remove_match_internal(
1149 return bus_remove_match_internal_kernel(bus, 0, cookie);
1151 return bus_remove_match_internal_dbus1(bus, match);
1154 _public_ int sd_bus_get_owner_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) {
1155 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
1159 assert_return(bus, -EINVAL);
1160 assert_return(name, -EINVAL);
1161 assert_return(machine, -EINVAL);
1162 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
1163 assert_return(!bus_pid_changed(bus), -ECHILD);
1164 assert_return(service_name_is_valid(name), -EINVAL);
1166 if (streq_ptr(name, bus->unique_name))
1167 return sd_id128_get_machine(machine);
1169 r = sd_bus_message_new_method_call(
1173 "org.freedesktop.DBus.Peer",
1174 "GetMachineId", &m);
1178 r = sd_bus_message_set_no_auto_start(m, true);
1182 r = sd_bus_call(bus, m, 0, NULL, &reply);
1186 r = sd_bus_message_read(reply, "s", &mid);
1190 return sd_id128_from_string(mid, machine);