74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#ifdef HAVE_VALGRIND_MEMCHECK_H

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <valgrind/memcheck.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#endif

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <stddef.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <errno.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "strv.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "sd-bus.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "bus-internal.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "bus-message.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "bus-control.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "bus-bloom.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "bus-util.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "cgroup-util.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering_public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert_return(bus, -EINVAL);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert_return(unique, -EINVAL);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert_return(!bus_pid_changed(bus), -ECHILD);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = bus_ensure_running(bus);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *unique = bus->unique_name;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct kdbus_cmd_name *n;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering size_t size, l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(bus);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(name);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering l = strlen(name) + 1;

size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l);

n = alloca0_align(size, 8);

n->size = size;

kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);

n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;

n->items[0].type = KDBUS_ITEM_NAME;

memcpy(n->items[0].str, name, l);

#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)

return -errno;

if (n->flags & KDBUS_NAME_IN_QUEUE)

return 0;

return 1;

}

static int bus_request_name_dbus1(sd_bus *bus, const char *name, uint64_t flags) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

uint32_t ret, param = 0;

int r;

assert(bus);

assert(name);

if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)

param |= BUS_NAME_ALLOW_REPLACEMENT;

if (flags & SD_BUS_NAME_REPLACE_EXISTING)

param |= BUS_NAME_REPLACE_EXISTING;

if (!(flags & SD_BUS_NAME_QUEUE))

param |= BUS_NAME_DO_NOT_QUEUE;

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"RequestName",

NULL,

&reply,

"su",

name,

param);

if (r < 0)

return r;

r = sd_bus_message_read(reply, "u", &ret);

if (r < 0)

return r;

if (ret == BUS_NAME_ALREADY_OWNER)

return -EALREADY;

else if (ret == BUS_NAME_EXISTS)

return -EEXIST;

else if (ret == BUS_NAME_IN_QUEUE)

return 0;

else if (ret == BUS_NAME_PRIMARY_OWNER)

return 1;

return -EIO;

}

_public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags) {

assert_return(bus, -EINVAL);

assert_return(name, -EINVAL);

assert_return(bus->bus_client, -EINVAL);

assert_return(!bus_pid_changed(bus), -ECHILD);

assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL);

assert_return(service_name_is_valid(name), -EINVAL);

assert_return(name[0] != ':', -EINVAL);

if (!BUS_IS_OPEN(bus->state))

return -ENOTCONN;

if (bus->is_kernel)

return bus_request_name_kernel(bus, name, flags);

else

return bus_request_name_dbus1(bus, name, flags);

}

static int bus_release_name_kernel(sd_bus *bus, const char *name) {

struct kdbus_cmd_name *n;

size_t size, l;

int r;

assert(bus);

assert(name);

l = strlen(name) + 1;

size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l);

n = alloca0_align(size, 8);

n->size = size;

n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;

n->items[0].type = KDBUS_ITEM_NAME;

memcpy(n->items[0].str, name, l);

#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;

}

static int bus_release_name_dbus1(sd_bus *bus, const char *name) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

uint32_t ret;

int r;

assert(bus);

assert(name);

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/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;

if (ret == BUS_NAME_NON_EXISTENT)

return -ESRCH;

if (ret == BUS_NAME_NOT_OWNER)

return -EADDRINUSE;

if (ret == BUS_NAME_RELEASED)

return 0;

return -EINVAL;

}

_public_ int sd_bus_release_name(sd_bus *bus, const char *name) {

assert_return(bus, -EINVAL);

assert_return(name, -EINVAL);

assert_return(bus->bus_client, -EINVAL);

assert_return(!bus_pid_changed(bus), -ECHILD);

assert_return(service_name_is_valid(name), -EINVAL);

assert_return(name[0] != ':', -EINVAL);

if (!BUS_IS_OPEN(bus->state))

return -ENOTCONN;

if (bus->is_kernel)

return bus_release_name_kernel(bus, name);

else

return bus_release_name_dbus1(bus, name);

}

static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {

struct kdbus_cmd_name_list cmd = {};

struct kdbus_name_list *name_list;

struct kdbus_cmd_name *name;

uint64_t previous_id = 0;

int r;

/* Caller will free half-constructed list on failure... */

cmd.flags = flags;

r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);

if (r < 0)

return -errno;

name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);

KDBUS_ITEM_FOREACH(name, name_list, names) {

struct kdbus_item *item;

const char *entry_name = NULL;

if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->owner_id != previous_id) {

char *n;

if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0)

return -ENOMEM;

r = strv_consume(x, n);

if (r < 0)

return r;

previous_id = name->owner_id;

}

KDBUS_ITEM_FOREACH(item, name, items)

if (item->type == KDBUS_ITEM_NAME)

entry_name = item->str;

if (entry_name && service_name_is_valid(entry_name)) {

r = strv_extend(x, entry_name);

if (r < 0)

return -ENOMEM;

}

}

r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset);

if (r < 0)

return -errno;

return 0;

}

static int bus_list_names_kernel(sd_bus *bus, char ***acquired, char ***activatable) {

_cleanup_strv_free_ char **x = NULL, **y = NULL;

int r;

if (acquired) {

r = kernel_get_list(bus, KDBUS_NAME_LIST_UNIQUE | KDBUS_NAME_LIST_NAMES, &x);

if (r < 0)

return r;

}

if (activatable) {

r = kernel_get_list(bus, KDBUS_NAME_LIST_ACTIVATORS, &y);

if (r < 0)

return r;

*activatable = y;

y = NULL;

}

if (acquired) {

*acquired = x;

x = NULL;

}

return 0;

}

static int bus_list_names_dbus1(sd_bus *bus, char ***acquired, char ***activatable) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

_cleanup_strv_free_ char **x = NULL, **y = NULL;

int r;

if (acquired) {

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"ListNames",

NULL,

&reply,

NULL);

if (r < 0)

return r;

r = sd_bus_message_read_strv(reply, &x);

if (r < 0)

return r;

reply = sd_bus_message_unref(reply);

}

if (activatable) {

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"ListActivatableNames",

NULL,

&reply,

NULL);

if (r < 0)

return r;

r = sd_bus_message_read_strv(reply, &y);

if (r < 0)

return r;

*activatable = y;

y = NULL;

}

if (acquired) {

*acquired = x;

x = NULL;

}

return 0;

}

_public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) {

assert_return(bus, -EINVAL);

assert_return(acquired || activatable, -EINVAL);

assert_return(!bus_pid_changed(bus), -ECHILD);

if (!BUS_IS_OPEN(bus->state))

return -ENOTCONN;

if (bus->is_kernel)

return bus_list_names_kernel(bus, acquired, activatable);

else

return bus_list_names_dbus1(bus, acquired, activatable);

}

static int bus_get_owner_kdbus(

sd_bus *bus,

const char *name,

uint64_t mask,

sd_bus_creds **creds) {

_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;

struct kdbus_cmd_conn_info *cmd;

struct kdbus_conn_info *conn_info;

struct kdbus_item *item;

size_t size;

uint64_t m, id;

int r;

r = bus_kernel_parse_unique_name(name, &id);

if (r < 0)

return r;

if (r > 0) {

size = offsetof(struct kdbus_cmd_conn_info, items);

cmd = alloca0_align(size, 8);

cmd->id = id;

} else {

size_t item_size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;

size = offsetof(struct kdbus_cmd_conn_info, items) + item_size;

cmd = alloca0_align(size, 8);

cmd->items[0].size = item_size;

cmd->items[0].type = KDBUS_ITEM_NAME;

strcpy(cmd->items[0].str, name);

}

cmd->size = size;

kdbus_translate_attach_flags(mask, (uint64_t*) &cmd->flags);

r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);

if (r < 0)

return -errno;

conn_info = (struct kdbus_conn_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);

/* Non-activated names are considered not available */

if (conn_info->flags & KDBUS_HELLO_ACTIVATOR)

return name[0] == ':' ? -ENXIO : -ESRCH;

c = bus_creds_new();

if (!c)

return -ENOMEM;

if (mask & SD_BUS_CREDS_UNIQUE_NAME) {

if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) conn_info->id) < 0)

return -ENOMEM;

c->mask |= SD_BUS_CREDS_UNIQUE_NAME;

}

KDBUS_ITEM_FOREACH(item, conn_info, items) {

switch (item->type) {

case KDBUS_ITEM_CREDS:

m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID) & mask;

if (m) {

c->uid = (uid_t) item->creds.uid;

c->pid = (pid_t) item->creds.pid;

c->gid = (gid_t) item->creds.gid;

c->mask |= m;

}

if (mask & SD_BUS_CREDS_TID && item->creds.tid > 0) {

c->tid = (pid_t) item->creds.tid;

c->mask |= SD_BUS_CREDS_TID;

}

if (mask & SD_BUS_CREDS_PID_STARTTIME && item->creds.starttime > 0) {

c->pid_starttime = item->creds.starttime;

c->mask |= SD_BUS_CREDS_PID_STARTTIME;

}

break;

case KDBUS_ITEM_PID_COMM:

if (mask & SD_BUS_CREDS_COMM) {

c->comm = strdup(item->str);

if (!c->comm) {

r = -ENOMEM;

goto fail;

}

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) {

r = -ENOMEM;

goto fail;

}

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) {

r = -ENOMEM;

goto fail;

}

c->mask |= SD_BUS_CREDS_EXE;

}

break;

case KDBUS_ITEM_CMDLINE:

if (mask & SD_BUS_CREDS_CMDLINE) {

c->cmdline_size = item->size - KDBUS_ITEM_HEADER_SIZE;

c->cmdline = memdup(item->data, c->cmdline_size);

if (!c->cmdline) {

r = -ENOMEM;

goto fail;

}

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) {

r = -ENOMEM;

goto fail;

}

r = bus_get_root_path(bus);

if (r < 0)

goto fail;

c->cgroup_root = strdup(bus->cgroup_root);

if (!c->cgroup_root) {

r = -ENOMEM;

goto fail;

}

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_ITEM_HEADER_SIZE;

c->capability = memdup(item->data, c->capability_size);

if (!c->capability) {

r = -ENOMEM;

goto fail;

}

c->mask |= m;

}

break;

case KDBUS_ITEM_SECLABEL:

if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {

c->label = strdup(item->str);

if (!c->label) {

r = -ENOMEM;

goto fail;

}

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;

case KDBUS_ITEM_NAME:

if ((mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) && service_name_is_valid(item->name.name)) {

r = strv_extend(&c->well_known_names, item->name.name);

if (r < 0)

goto fail;

c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;

}

break;

case KDBUS_ITEM_CONN_NAME:

if ((mask & SD_BUS_CREDS_CONNECTION_NAME)) {

c->conn_name = strdup(item->str);

if (!c->conn_name) {

r = -ENOMEM;

goto fail;

}

c->mask |= SD_BUS_CREDS_CONNECTION_NAME;

}

break;

}

}

if (creds) {

*creds = c;

c = NULL;

}

r = 0;

fail:

ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);

return r;

}

static int bus_get_owner_dbus1(

sd_bus *bus,

const char *name,

uint64_t mask,

sd_bus_creds **creds) {

_cleanup_bus_message_unref_ sd_bus_message *reply_unique = NULL, *reply = NULL;

_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;

const char *unique = NULL;

pid_t pid = 0;

int r;

/* Only query the owner if the caller wants to know it or if

if ((mask & SD_BUS_CREDS_UNIQUE_NAME) || mask == 0) {

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"GetNameOwner",

NULL,

&reply_unique,

"s",

name);

if (r < 0)

return r;

r = sd_bus_message_read(reply_unique, "s", &unique);

if (r < 0)

return r;

}

if (mask != 0) {

c = bus_creds_new();

if (!c)

return -ENOMEM;

if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {

c->unique_name = strdup(unique);

if (!c->unique_name)

return -ENOMEM;

c->mask |= SD_BUS_CREDS_UNIQUE_NAME;

}

if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_GID|

SD_BUS_CREDS_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE|

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|

SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS|

SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) {

uint32_t u;

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"GetConnectionUnixProcessID",

NULL,

&reply,

"s",

unique ? unique : 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",

"org.freedesktop.DBus",

"GetConnectionUnixUser",

NULL,

&reply,

"s",

unique ? unique : 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 = NULL;

size_t sz = 0;

r = sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"GetConnectionSELinuxSecurityContext",

NULL,

&reply,

"s",

unique ? unique : 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;

}

return 0;

}

_public_ int sd_bus_get_owner(

sd_bus *bus,

const char *name,

uint64_t mask,

sd_bus_creds **creds) {

assert_return(bus, -EINVAL);

assert_return(name, -EINVAL);

assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);

assert_return(mask == 0 || creds, -EINVAL);

assert_return(!bus_pid_changed(bus), -ECHILD);

assert_return(service_name_is_valid(name), -EINVAL);

assert_return(bus->bus_client, -ENODATA);

if (!BUS_IS_OPEN(bus->state))

return -ENOTCONN;

if (bus->is_kernel)

return bus_get_owner_kdbus(bus, name, mask, creds);

else

return bus_get_owner_dbus1(bus, name, mask, creds);

}

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 = KDBUS_MATCH_ID_ANY, 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

if (name) {

is_name_id = bus_kernel_parse_unique_name(name, &name_id);

if (is_name_id < 0)

return 0;

}

if (!isempty(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;

} else

old_owner_id = KDBUS_MATCH_ID_ANY;

if (!isempty(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;

} else

new_owner_id = KDBUS_MATCH_ID_ANY;

if (is_name_id <= 0) {

struct kdbus_cmd_match *m;

size_t sz, l;

/* If the name argument is missing or is a well-known

l = name ? strlen(name) + 1 : 0;

sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +

offsetof(struct kdbus_item, name_change) +

offsetof(struct kdbus_notify_name_change, name) +

l);

m = alloca0_align(sz, 8);

m->size = sz;

m->cookie = cookie;

item = m->items;

item->size =

offsetof(struct kdbus_item, name_change) +

offsetof(struct kdbus_notify_name_change, name) +

l;

item->name_change.old_id.id = old_owner_id;

item->name_change.new_id.id = new_owner_id;

if (name)

memcpy(item->name_change.name, name, l);

/* If the old name is unset or empty, then

if (!old_owner || old_owner[0] == 0) {

item->type = KDBUS_ITEM_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

if (!new_owner || new_owner[0] == 0) {

item->type = KDBUS_ITEM_NAME_REMOVE;

r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);

if (r < 0)

return -errno;

}

/* The CHANGE match we need in either case, because

item->type = KDBUS_ITEM_NAME_CHANGE;

r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);

if (r < 0)

return -errno;

}

if (is_name_id != 0) {

struct kdbus_cmd_match *m;

uint64_t sz;

/* If the name argument is missing or is a unique

sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +

offsetof(struct kdbus_item, id_change) +

sizeof(struct kdbus_notify_id_change));

m = alloca0_align(sz, 8);

m->size = sz;

m->cookie = cookie;

item = m->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

if (!old_owner || old_owner[0] == 0) {

item->type = KDBUS_ITEM_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

if (!new_owner || new_owner[0] == 0) {

item->type = KDBUS_ITEM_ID_REMOVE;

r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);

if (r < 0)

return -errno;

}

}

return 0;

}

int bus_add_match_internal_kernel(

sd_bus *bus,

struct bus_match_component *components,

unsigned n_components,

uint64_t cookie) {

struct kdbus_cmd_match *m;

struct kdbus_item *item;

uint64_t *bloom;

size_t sz;

const char *sender = NULL;

size_t sender_length = 0;

uint64_t src_id = KDBUS_MATCH_ID_ANY;

bool using_bloom = false;

unsigned i;

bool matches_name_change = true;

const char *name_change_arg[3] = {};

int r;

assert(bus);

bloom = alloca0(bus->bloom_size);

sz = ALIGN8(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;

else if (r > 0)

sz += ALIGN8(offsetof(struct kdbus_item, id) + sizeof(uint64_t));

else {

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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "path", c->value_str);

using_bloom = true;

break;

case BUS_MATCH_PATH_NAMESPACE:

if (!streq(c->value_str, "/")) {

bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, 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, bus->bloom_size, bus->bloom_n_hash, 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, bus->bloom_size, bus->bloom_n_hash, buf, c->value_str);

using_bloom = true;

break;

}

case BUS_MATCH_DESTINATION:

/* The bloom filter does not include

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) + bus->bloom_size);

m = alloca0_align(sz, 8);

m->size = sz;

m->cookie = cookie;

item = m->items;

if (src_id != KDBUS_MATCH_ID_ANY) {

item->size = offsetof(struct kdbus_item, id) + sizeof(uint64_t);

item->type = KDBUS_ITEM_ID;

item->id = src_id;

item = KDBUS_ITEM_NEXT(item);

}

if (using_bloom) {

item->size = offsetof(struct kdbus_item, data64) + bus->bloom_size;

item->type = KDBUS_ITEM_BLOOM_MASK;

memcpy(item->data64, bloom, bus->bloom_size);

item = KDBUS_ITEM_NEXT(item);

}

if (sender) {

item->size = offsetof(struct kdbus_item, str) + sender_length + 1;

item->type = KDBUS_ITEM_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

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;

}

#define internal_match(bus, m) \

((bus)->hello_flags & KDBUS_HELLO_MONITOR \

? (isempty(m) ? "eavesdrop='true'" : strappenda((m), ",eavesdrop='true'")) \

: (m))

static int bus_add_match_internal_dbus1(

sd_bus *bus,

const char *match) {

const char *e;

assert(bus);

assert(match);

e = internal_match(bus, match);

return sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"AddMatch",

NULL,

NULL,

"s",

e);

}

int bus_add_match_internal(

sd_bus *bus,

const char *match,

struct bus_match_component *components,

unsigned n_components,

uint64_t cookie) {

assert(bus);

if (bus->is_kernel)

return bus_add_match_internal_kernel(bus, components, n_components, cookie);

else

return bus_add_match_internal_dbus1(bus, match);

}

int bus_remove_match_internal_kernel(

sd_bus *bus,

uint64_t cookie) {

struct kdbus_cmd_match m;

int r;

assert(bus);

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;

}

static int bus_remove_match_internal_dbus1(

sd_bus *bus,

const char *match) {

const char *e;

assert(bus);

assert(match);

e = internal_match(bus, match);

return sd_bus_call_method(

bus,

"org.freedesktop.DBus",

"/org/freedesktop/DBus",

"org.freedesktop.DBus",

"RemoveMatch",

NULL,

NULL,

"s",

e);

}

int bus_remove_match_internal(

sd_bus *bus,

const char *match,

uint64_t cookie) {

assert(bus);

if (bus->is_kernel)

return bus_remove_match_internal_kernel(bus, cookie);

else

return bus_remove_match_internal_dbus1(bus, 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_pid_changed(bus), -ECHILD);

assert_return(service_name_is_valid(name), -EINVAL);

if (!BUS_IS_OPEN(bus->state))

return -ENOTCONN;

if (streq_ptr(name, bus->unique_name))

return sd_id128_get_machine(machine);

r = sd_bus_message_new_method_call(

bus,

&m,

name,

"/",

"org.freedesktop.DBus.Peer",

"GetMachineId");

if (r < 0)

return r;

r = sd_bus_message_set_auto_start(m, false);

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);

}