/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#ifdef HAVE_VALGRIND_MEMCHECK_H
#include
#endif
#include
#include
#include "strv.h"
#include "sd-bus.h"
#include "bus-internal.h"
#include "bus-message.h"
#include "bus-control.h"
#include "bus-bloom.h"
#include "bus-util.h"
_public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
int r;
assert_return(bus, -EINVAL);
assert_return(unique, -EINVAL);
assert_return(!bus_pid_changed(bus), -ECHILD);
r = bus_ensure_running(bus);
if (r < 0)
return r;
*unique = bus->unique_name;
return 0;
}
_public_ int sd_bus_request_name(sd_bus *bus, const char *name, int flags) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
uint32_t ret;
int r;
assert_return(bus, -EINVAL);
assert_return(name, -EINVAL);
assert_return(bus->bus_client, -EINVAL);
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel) {
struct kdbus_cmd_name *n;
size_t l;
l = strlen(name);
n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);
memcpy(n->name, name, l+1);
#ifdef HAVE_VALGRIND_MEMCHECK_H
VALGRIND_MAKE_MEM_DEFINED(n, n->size);
#endif
r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
if (r < 0) {
if (errno == -EALREADY)
return SD_BUS_NAME_ALREADY_OWNER;
if (errno == -EEXIST)
return SD_BUS_NAME_EXISTS;
return -errno;
}
if (n->flags & KDBUS_NAME_IN_QUEUE)
return SD_BUS_NAME_IN_QUEUE;
return SD_BUS_NAME_PRIMARY_OWNER;
} else {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"RequestName",
NULL,
&reply,
"su",
name,
flags);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "u", &ret);
if (r < 0)
return r;
return ret;
}
}
_public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
uint32_t ret;
int r;
assert_return(bus, -EINVAL);
assert_return(name, -EINVAL);
assert_return(bus->bus_client, -EINVAL);
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel) {
struct kdbus_cmd_name *n;
size_t l;
l = strlen(name);
n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
memcpy(n->name, name, l+1);
#ifdef HAVE_VALGRIND_MEMCHECK_H
VALGRIND_MAKE_MEM_DEFINED(n, n->size);
#endif
r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
if (r < 0)
return -errno;
return n->flags;
} else {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"ReleaseName",
NULL,
&reply,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "u", &ret);
if (r < 0)
return r;
}
return ret;
}
_public_ int sd_bus_list_names(sd_bus *bus, char ***l) {
_cleanup_bus_message_unref_ sd_bus_message *reply1 = NULL, *reply2 = NULL;
char **x = NULL;
int r;
assert_return(bus, -EINVAL);
assert_return(l, -EINVAL);
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel) {
_cleanup_free_ struct kdbus_cmd_name_list *cmd = NULL;
struct kdbus_name_list *name_list;
struct kdbus_cmd_name *name;
cmd = malloc0(sizeof(struct kdbus_cmd_name_list *));
if (!cmd)
return -ENOMEM;
cmd->flags = KDBUS_NAME_LIST_UNIQUE_NAMES;
r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_LIST, cmd);
if (r < 0)
return -errno;
name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
KDBUS_PART_FOREACH(name, name_list, names) {
char *n;
if (name->size > sizeof(*name))
n = name->name;
else
asprintf(&n, ":1.%llu", (unsigned long long) name->id);
r = strv_extend(&x, n);
if (r < 0)
return -ENOMEM;
}
r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_FREE, &cmd->offset);
if (r < 0)
return -errno;
*l = x;
} else {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"ListNames",
NULL,
&reply1,
NULL);
if (r < 0)
return r;
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"ListActivatableNames",
NULL,
&reply2,
NULL);
if (r < 0)
return r;
r = bus_message_read_strv_extend(reply1, &x);
if (r < 0) {
strv_free(x);
return r;
}
r = bus_message_read_strv_extend(reply2, &x);
if (r < 0) {
strv_free(x);
return r;
}
*l = strv_uniq(x);
}
return 0;
}
static int sd_bus_get_owner_dbus(
sd_bus *bus,
const char *name,
uint64_t mask,
char **owner,
sd_bus_creds **creds) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
_cleanup_free_ char *unique = NULL;
pid_t pid = 0;
int r;
/* Only query the owner if the caller wants to know it or if
* the caller just wants to check whether a name exists */
if (owner || mask == 0) {
const char *found;
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"GetNameOwner",
NULL,
&reply,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "s", &found);
if (r < 0)
return r;
unique = strdup(found);
if (!unique)
return -ENOMEM;
reply = sd_bus_message_unref(reply);
}
if (mask != 0) {
c = bus_creds_new();
if (!c)
return -ENOMEM;
if ((mask & SD_BUS_CREDS_PID) ||
mask & ~(SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|SD_BUS_CREDS_SELINUX_CONTEXT)) {
uint32_t u;
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"GetConnectionUnixProcessID",
NULL,
&reply,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "u", &u);
if (r < 0)
return r;
pid = u;
if (mask & SD_BUS_CREDS_PID) {
c->pid = u;
c->mask |= SD_BUS_CREDS_PID;
}
reply = sd_bus_message_unref(reply);
}
if (mask & SD_BUS_CREDS_UID) {
uint32_t u;
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"GetConnectionUnixUser",
NULL,
&reply,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "u", &u);
if (r < 0)
return r;
c->uid = u;
c->mask |= SD_BUS_CREDS_UID;
reply = sd_bus_message_unref(reply);
}
if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
const void *p;
size_t sz;
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"GetConnectionSELinuxSecurityContext",
NULL,
&reply,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read_array(reply, 'y', &p, &sz);
if (r < 0)
return r;
c->label = strndup(p, sz);
if (!c->label)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
}
r = bus_creds_add_more(c, mask, pid, 0);
if (r < 0)
return r;
}
if (creds) {
*creds = c;
c = NULL;
}
if (owner) {
*owner = unique;
unique = NULL;
}
return 0;
}
static int add_name_change_match(sd_bus *bus,
uint64_t cookie,
const char *name,
const char *old_owner,
const char *new_owner) {
uint64_t name_id = 0, old_owner_id = 0, new_owner_id = 0;
int is_name_id = -1, r;
struct kdbus_item *item;
assert(bus);
/* If we encounter a match that could match against
* NameOwnerChanged messages, then we need to create
* KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE} and
* KDBUS_MATCH_ID_{ADD,REMOVE} matches for it, possibly
* multiple if the match is underspecified.
*
* The NameOwnerChanged signals take three parameters with
* unique or well-known names, but only some forms actually
* exist:
*
* WELLKNOWN, "", UNIQUE → KDBUS_MATCH_NAME_ADD
* WELLKNOWN, UNIQUE, "" → KDBUS_MATCH_NAME_REMOVE
* WELLKNOWN, UNIQUE, UNIQUE → KDBUS_MATCH_NAME_CHANGE
* UNIQUE, "", UNIQUE → KDBUS_MATCH_ID_ADD
* UNIQUE, UNIQUE, "" → KDBUS_MATCH_ID_REMOVE
*
* For the latter two the two unique names must be identical.
*
* */
if (name) {
is_name_id = bus_kernel_parse_unique_name(name, &name_id);
if (is_name_id < 0)
return 0;
}
if (old_owner) {
r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
if (r < 0)
return 0;
if (r == 0)
return 0;
if (is_name_id > 0 && old_owner_id != name_id)
return 0;
}
if (new_owner) {
r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
if (r < 0)
return r;
if (r == 0)
return 0;
if (is_name_id > 0 && new_owner_id != name_id)
return 0;
}
if (is_name_id <= 0) {
size_t sz, l;
/* If the name argument is missing or is a well-known
* name, then add KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE}
* matches for it */
l = name ? strlen(name) : 0;
sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
offsetof(struct kdbus_item, name_change) +
offsetof(struct kdbus_notify_name_change, name) +
l+1);
{
union {
uint8_t buffer[sz];
struct kdbus_cmd_match match;
} m;
memzero(&m, sz);
m.match.size = sz;
m.match.cookie = cookie;
m.match.src_id = KDBUS_SRC_ID_KERNEL;
item = m.match.items;
item->size =
offsetof(struct kdbus_item, name_change) +
offsetof(struct kdbus_notify_name_change, name) +
l+1;
item->name_change.old_id = old_owner_id;
item->name_change.new_id = new_owner_id;
if (name)
strcpy(item->name_change.name, name);
/* If the old name is unset or empty, then
* this can match against added names */
if (!old_owner || old_owner[0] == 0) {
item->type = KDBUS_MATCH_NAME_ADD;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
}
/* If the new name is unset or empty, then
* this can match against removed names */
if (!new_owner || new_owner[0] == 0) {
item->type = KDBUS_MATCH_NAME_REMOVE;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
}
/* If the neither name is explicitly set to
* the empty string, then this can match
* agains changed names */
if (!(old_owner && old_owner[0] == 0) &&
!(new_owner && new_owner[0] == 0)) {
item->type = KDBUS_MATCH_NAME_CHANGE;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
}
}
}
if (is_name_id != 0) {
uint64_t sz =
ALIGN8(offsetof(struct kdbus_cmd_match, items) +
offsetof(struct kdbus_item, id_change) +
sizeof(struct kdbus_notify_id_change));
union {
uint8_t buffer[sz];
struct kdbus_cmd_match match;
} m;
/* If the name argument is missing or is a unique
* name, then add KDBUS_MATCH_ID_{ADD,REMOVE} matches
* for it */
memzero(&m, sz);
m.match.size = sz;
m.match.cookie = cookie;
m.match.src_id = KDBUS_SRC_ID_KERNEL;
item = m.match.items;
item->size = offsetof(struct kdbus_item, id_change) + sizeof(struct kdbus_notify_id_change);
item->id_change.id = name_id;
/* If the old name is unset or empty, then this can
* match against added ids */
if (!old_owner || old_owner[0] == 0) {
item->type = KDBUS_MATCH_ID_ADD;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
}
/* If thew new name is unset or empty, then this can
match against removed ids */
if (!new_owner || new_owner[0] == 0) {
item->type = KDBUS_MATCH_ID_REMOVE;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
}
}
return 0;
}
static int kdbus_name_info(
sd_bus *bus,
const char *name,
uint64_t mask,
char **owner,
sd_bus_creds **creds) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
_cleanup_free_ struct kdbus_cmd_name_info *cmd = NULL;
_cleanup_free_ char *unique = NULL;
struct kdbus_name_info *name_info;
struct kdbus_item *item;
uint64_t attach_flags, m;
size_t size;
int r;
r = kdbus_translate_attach_flags(mask, &attach_flags);
if (r < 0)
return r;
size = sizeof(struct kdbus_cmd_name_info) + strlen(name) + 1;
cmd = malloc0(size);
if (!cmd)
return -ENOMEM;
cmd ->size = size;
cmd->attach_flags = attach_flags;
strcpy(cmd->name, name);
r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_INFO, cmd);
if (r < 0)
return -errno;
name_info = (struct kdbus_name_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
asprintf(&unique, ":1.%llu", (unsigned long long) name_info->id);
c = bus_creds_new();
if (!c)
return -ENOMEM;
KDBUS_PART_FOREACH(item, name_info, items) {
switch (item->type) {
case KDBUS_ITEM_CREDS:
m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID |
SD_BUS_CREDS_TID | SD_BUS_CREDS_PID_STARTTIME) & mask;
if (m) {
c->uid = item->creds.uid;
c->pid = item->creds.pid;
c->gid = item->creds.gid;
c->tid = item->creds.tid;
c->pid_starttime = item->creds.starttime;
c->mask |= m;
}
break;
case KDBUS_ITEM_PID_COMM:
if (mask & SD_BUS_CREDS_COMM) {
c->comm = strdup(item->str);
if (!c->comm)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_COMM;
}
break;
case KDBUS_ITEM_TID_COMM:
if (mask & SD_BUS_CREDS_TID_COMM) {
c->tid_comm = strdup(item->str);
if (!c->tid_comm)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_TID_COMM;
}
break;
case KDBUS_ITEM_EXE:
if (mask & SD_BUS_CREDS_EXE) {
c->exe = strdup(item->str);
if (!c->exe)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_EXE;
}
break;
case KDBUS_ITEM_CMDLINE:
if (mask & SD_BUS_CREDS_CMDLINE) {
c->cmdline_length = item->size - KDBUS_PART_HEADER_SIZE;
c->cmdline = memdup(item->data, c->cmdline_length);
if (!c->cmdline)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_CMDLINE;
}
break;
case KDBUS_ITEM_CGROUP:
m = (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) & mask;
if (m) {
c->cgroup = strdup(item->str);
if (!c->cgroup)
return -ENOMEM;
c->mask |= m;
}
break;
case KDBUS_ITEM_CAPS:
m = (SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_PERMITTED_CAPS |
SD_BUS_CREDS_INHERITABLE_CAPS | SD_BUS_CREDS_BOUNDING_CAPS) & mask;
if (m) {
c->capability_size = item->size - KDBUS_PART_HEADER_SIZE;
c->capability = memdup(item->data, c->capability_size);
if (!c->capability)
return -ENOMEM;
c->mask |= m;
}
break;
case KDBUS_ITEM_SECLABEL:
if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
c->label = strdup(item->str);
if (!c->label)
return -ENOMEM;
c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
}
break;
case KDBUS_ITEM_AUDIT:
m = (SD_BUS_CREDS_AUDIT_SESSION_ID | SD_BUS_CREDS_AUDIT_LOGIN_UID) & mask;
if (m) {
c->audit_session_id = item->audit.sessionid;
c->audit_login_uid = item->audit.loginuid;
c->mask |= m;
}
break;
}
}
r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_FREE, &cmd->offset);
if (r < 0)
return -errno;
if (creds) {
*creds = c;
c = NULL;
}
if (owner) {
*owner = unique;
unique = NULL;
}
return 0;
}
_public_ int sd_bus_get_owner(
sd_bus *bus,
const char *name,
uint64_t mask,
char **owner,
sd_bus_creds **creds) {
assert_return(bus, -EINVAL);
assert_return(name, -EINVAL);
assert_return(mask <= _SD_BUS_CREDS_MAX, -ENOTSUP);
assert_return(mask == 0 || creds, -EINVAL);
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel)
return kdbus_name_info(bus, name, mask, owner, creds);
return sd_bus_get_owner_dbus(bus, name, mask, owner, creds);
}
int bus_add_match_internal(
sd_bus *bus,
const char *match,
struct bus_match_component *components,
unsigned n_components,
uint64_t cookie) {
int r;
assert(bus);
assert(match);
if (bus->is_kernel) {
struct kdbus_cmd_match *m;
struct kdbus_item *item;
uint64_t bloom[BLOOM_SIZE/8];
size_t sz;
const char *sender = NULL;
size_t sender_length = 0;
uint64_t src_id = KDBUS_MATCH_SRC_ID_ANY;
bool using_bloom = false;
unsigned i;
bool matches_name_change = true;
const char *name_change_arg[3] = {};
zero(bloom);
sz = offsetof(struct kdbus_cmd_match, items);
for (i = 0; i < n_components; i++) {
struct bus_match_component *c = &components[i];
switch (c->type) {
case BUS_MATCH_SENDER:
if (!streq(c->value_str, "org.freedesktop.DBus"))
matches_name_change = false;
r = bus_kernel_parse_unique_name(c->value_str, &src_id);
if (r < 0)
return r;
if (r > 0) {
sender = c->value_str;
sender_length = strlen(sender);
sz += ALIGN8(offsetof(struct kdbus_item, str) + sender_length + 1);
}
break;
case BUS_MATCH_MESSAGE_TYPE:
if (c->value_u8 != SD_BUS_MESSAGE_SIGNAL)
matches_name_change = false;
bloom_add_pair(bloom, "message-type", bus_message_type_to_string(c->value_u8));
using_bloom = true;
break;
case BUS_MATCH_INTERFACE:
if (!streq(c->value_str, "org.freedesktop.DBus"))
matches_name_change = false;
bloom_add_pair(bloom, "interface", c->value_str);
using_bloom = true;
break;
case BUS_MATCH_MEMBER:
if (!streq(c->value_str, "NameOwnerChanged"))
matches_name_change = false;
bloom_add_pair(bloom, "member", c->value_str);
using_bloom = true;
break;
case BUS_MATCH_PATH:
if (!streq(c->value_str, "/org/freedesktop/DBus"))
matches_name_change = false;
bloom_add_pair(bloom, "path", c->value_str);
using_bloom = true;
break;
case BUS_MATCH_PATH_NAMESPACE:
if (!streq(c->value_str, "/")) {
bloom_add_pair(bloom, "path-slash-prefix", c->value_str);
using_bloom = true;
}
break;
case BUS_MATCH_ARG...BUS_MATCH_ARG_LAST: {
char buf[sizeof("arg")-1 + 2 + 1];
if (c->type - BUS_MATCH_ARG < 3)
name_change_arg[c->type - BUS_MATCH_ARG] = c->value_str;
snprintf(buf, sizeof(buf), "arg%u", c->type - BUS_MATCH_ARG);
bloom_add_pair(bloom, buf, c->value_str);
using_bloom = true;
break;
}
case BUS_MATCH_ARG_PATH...BUS_MATCH_ARG_PATH_LAST: {
char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
snprintf(buf, sizeof(buf), "arg%u-slash-prefix", c->type - BUS_MATCH_ARG_PATH);
bloom_add_pair(bloom, buf, c->value_str);
using_bloom = true;
break;
}
case BUS_MATCH_ARG_NAMESPACE...BUS_MATCH_ARG_NAMESPACE_LAST: {
char buf[sizeof("arg")-1 + 2 + sizeof("-dot-prefix")];
snprintf(buf, sizeof(buf), "arg%u-dot-prefix", c->type - BUS_MATCH_ARG_NAMESPACE);
bloom_add_pair(bloom, buf, c->value_str);
using_bloom = true;
break;
}
case BUS_MATCH_DESTINATION:
/* The bloom filter does not include
the destination, since it is only
available for broadcast messages
which do not carry a destination
since they are undirected. */
break;
case BUS_MATCH_ROOT:
case BUS_MATCH_VALUE:
case BUS_MATCH_LEAF:
case _BUS_MATCH_NODE_TYPE_MAX:
case _BUS_MATCH_NODE_TYPE_INVALID:
assert_not_reached("Invalid match type?");
}
}
if (using_bloom)
sz += ALIGN8(offsetof(struct kdbus_item, data64) + BLOOM_SIZE);
m = alloca0(sz);
m->size = sz;
m->cookie = cookie;
m->src_id = src_id;
item = m->items;
if (using_bloom) {
item->size = offsetof(struct kdbus_item, data64) + BLOOM_SIZE;
item->type = KDBUS_MATCH_BLOOM;
memcpy(item->data64, bloom, BLOOM_SIZE);
item = KDBUS_PART_NEXT(item);
}
if (sender) {
item->size = offsetof(struct kdbus_item, str) + sender_length + 1;
item->type = KDBUS_MATCH_SRC_NAME;
memcpy(item->str, sender, sender_length + 1);
}
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
return -errno;
if (matches_name_change) {
/* If this match could theoretically match
* NameOwnerChanged messages, we need to
* install a second non-bloom filter explitly
* for it */
r = add_name_change_match(bus, cookie, name_change_arg[0], name_change_arg[1], name_change_arg[2]);
if (r < 0)
return r;
}
return 0;
} else
return sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"AddMatch",
NULL,
NULL,
"s",
match);
}
int bus_remove_match_internal(
sd_bus *bus,
const char *match,
uint64_t cookie) {
int r;
assert(bus);
assert(match);
if (bus->is_kernel) {
struct kdbus_cmd_match m;
zero(m);
m.size = offsetof(struct kdbus_cmd_match, items);
m.cookie = cookie;
r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
if (r < 0)
return -errno;
return 0;
} else {
return sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"RemoveMatch",
NULL,
NULL,
"s",
match);
}
}
_public_ int sd_bus_get_owner_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
const char *mid;
int r;
assert_return(bus, -EINVAL);
assert_return(name, -EINVAL);
assert_return(machine, -EINVAL);
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (streq_ptr(name, bus->unique_name))
return sd_id128_get_machine(machine);
r = sd_bus_message_new_method_call(
bus,
name,
"/",
"org.freedesktop.DBus.Peer",
"GetMachineId", &m);
if (r < 0)
return r;
r = sd_bus_message_set_no_auto_start(m, true);
if (r < 0)
return r;
r = sd_bus_call(bus, m, 0, NULL, &reply);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "s", &mid);
if (r < 0)
return r;
return sd_id128_from_string(mid, machine);
}