-/*
- * kdbus-d.c
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/* kdbus-d.c kdbus related daemon functions
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ *
+ * Licensed under the Academic Free License version 2.1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version and 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.
*
- * Created on: Sep 4, 2013
- * Author: r.pajak
+ * This program 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 General Public License for more details.
*
- * kdbus add-on to dbus daemon
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <unistd.h>
#include <errno.h>
+/*
+ * Converts string with unique name into __u64 id number. If the name is not unique, sets error.
+ */
__u64 sender_name_to_id(const char* name, DBusError* error)
{
__u64 sender_id = 0;
return sender_id;
}
+/*
+ * Creates kdbus bus of given type.
+ */
char* make_kdbus_bus(DBusBusType type, DBusError *error)
{
struct {
int fdc, ret;
char *bus;
- /*TODO Distinguish session and system bus make*/
-
_dbus_verbose("Opening /dev/kdbus/control\n");
fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
if (fdc < 0)
if(type == DBUS_BUS_SYSTEM)
snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%s", getuid(), "system");
+ else if(type == DBUS_BUS_SESSION)
+ snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus", getuid());
else
snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%u", getuid(), getpid());
+
bus_make.n_type = KDBUS_MAKE_NAME;
bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
return bus;
}
+/*
+ * Minimal server init needed by context to go further.
+ */
DBusServer* empty_server_init(char* address)
{
return dbus_server_init_mini(address);
}
+/*
+ * Connects daemon to bus created by him and adds matches for "system" broadcasts.
+ * Do not requests org.freedesktop.DBus name, because it's to early
+ * (some structures of BusContext are not ready yet).
+ */
DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
{
DBusConnection* connection;
- DBusString daemon_name;
dbus_bus_set_bus_connection_address(type, address);
if(connection == NULL)
return NULL;
- _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
- if(!kdbus_register_policy (&daemon_name, connection))
- goto failed;
-
- if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
- goto failed;
-
- if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='IdRemoved'"))
+ if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='IdRemoved'"))
{
dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
- return FALSE;
+ goto failed;
}
if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameChanged'"))
{
dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
- return FALSE;
+ goto failed;
}
if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameLost'"))
{
dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
- return FALSE;
+ goto failed;
}
if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameAcquired'"))
{
dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
- return FALSE;
+ goto failed;
}
if(dbus_error_is_set(error))
return connection;
}
-dbus_bool_t kdbus_register_policy (const DBusString *service_name, DBusConnection* connection)
+/*
+ * Asks bus for org.freedesktop.DBus well-known name.
+ */
+dbus_bool_t register_daemon_name(DBusConnection* connection)
{
- int fd;
+ DBusString daemon_name;
+ dbus_bool_t retval = FALSE;
+ BusTransaction *transaction;
- _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
+ _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
+ if(!register_kdbus_policy(DBUS_SERVICE_DBUS, dbus_connection_get_transport(connection), geteuid()))
+ return FALSE;
+
+ if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
+ return FALSE;
+
+ transaction = bus_transaction_new (bus_connection_get_context(connection));
+ if (transaction == NULL)
+ {
+ kdbus_release_name(connection, &daemon_name, 0);
+ goto out;
+ }
+
+ if(!bus_registry_ensure (bus_connection_get_registry (connection), &daemon_name, connection, 0, transaction, NULL))
+ {
+ kdbus_release_name(connection, &daemon_name, 0);
+ goto out;
+ }
+
+ retval = TRUE;
- return register_kdbus_policy(_dbus_string_get_const_data(service_name), fd);
+out:
+ bus_transaction_cancel_and_free(transaction);
+ return retval;
}
dbus_uint32_t kdbus_request_name(DBusConnection* connection, const DBusString *service_name, dbus_uint32_t flags, __u64 sender_id)
return release_kdbus_name(fd, _dbus_string_get_const_data(service_name), sender_id);
}
+/*
+ * Asks kdbus for well-known names registered on the bus
+ */
dbus_bool_t kdbus_list_services (DBusConnection* connection, char ***listp, int *array_len)
{
int fd;
+ struct kdbus_cmd_names* pCmd;
+ __u64 cmd_size;
+ dbus_bool_t ret_val = FALSE;
+ char** list;
+ int list_len = 0;
+ int i = 0;
+ int j;
+
+ cmd_size = sizeof(struct kdbus_cmd_names) + KDBUS_ITEM_SIZE(1);
+ pCmd = malloc(cmd_size);
+ if(pCmd == NULL)
+ goto out;
+ pCmd->size = cmd_size;
_dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
- return list_kdbus_names(fd, listp, array_len);
+again:
+ cmd_size = 0;
+ if(ioctl(fd, KDBUS_CMD_NAME_LIST, pCmd))
+ {
+ if(errno == EINTR)
+ goto again;
+ if(errno == ENOBUFS) //buffer to small to put all names into it
+ cmd_size = pCmd->size; //here kernel tells how much memory it needs
+ else
+ {
+ _dbus_verbose("kdbus error asking for name list: err %d (%m)\n",errno);
+ goto out;
+ }
+ }
+ if(cmd_size) //kernel needs more memory
+ {
+ pCmd = realloc(pCmd, cmd_size); //prepare memory
+ if(pCmd == NULL)
+ return FALSE;
+ goto again; //and try again
+ }
+ else
+ {
+ struct kdbus_cmd_name* pCmd_name;
+
+ for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
+ list_len++;
+
+ list = malloc(sizeof(char*) * (list_len + 1));
+ if(list == NULL)
+ goto out;
+
+ for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
+ {
+ list[i] = strdup(pCmd_name->name);
+ if(list[i] == NULL)
+ {
+ for(j=0; j<i; j++)
+ free(list[j]);
+ free(list);
+ goto out;
+ }
+ _dbus_verbose ("Name %d: %s\n", i, list[i]);
+ ++i;
+ }
+ list[i] = NULL;
+ }
+
+ *array_len = list_len;
+ *listp = list;
+ ret_val = TRUE;
+
+out:
+ if(pCmd)
+ free(pCmd);
+ return ret_val;
}
+/*
+ * Register match rule in kdbus on behalf of sender of the message
+ */
dbus_bool_t kdbus_add_match_rule (DBusConnection* connection, DBusMessage* message, const char* text, DBusError* error)
{
__u64 sender_id;
return TRUE;
}
+/*
+ * Removes match rule in kdbus on behalf of sender of the message
+ */
dbus_bool_t kdbus_remove_match (DBusConnection* connection, DBusMessage* message, DBusError* error)
{
__u64 sender_id;
return TRUE;
}
-dbus_bool_t kdbus_get_connection_unix_user(DBusConnection* connection, DBusMessage* message, unsigned long* uid, DBusError* error)
+int kdbus_get_name_owner(DBusConnection* connection, const char* name, char* owner)
{
- char* name = NULL;
- struct nameInfo info;
- int inter_ret;
- dbus_bool_t ret = FALSE;
+ int ret;
+ struct nameInfo info;
+
+ ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
+ if(ret == 0) //unique id of the name
+ {
+ sprintf(owner, ":1.%llu", (unsigned long long int)info.uniqueId);
+ _dbus_verbose("Unique name discovered:%s\n", owner);
+ }
+ else if(ret != -ENOENT)
+ _dbus_verbose("kdbus error sending name query: err %d (%m)\n", errno);
+
+ return ret;
+}
- dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
- inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
- if(inter_ret == 0) //name found
- {
- _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
- *uid = info.userId;
- return TRUE;
- }
- else if(inter_ret == -ENOENT) //name has no owner
- dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
- else
- {
- _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
- dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
- }
+/*
+ * Asks kdbus for uid of the owner of the name given in the message
+ */
+dbus_bool_t kdbus_get_unix_user(DBusConnection* connection, const char* name, unsigned long* uid, DBusError* error)
+{
+ struct nameInfo info;
+ int inter_ret;
+ dbus_bool_t ret = FALSE;
+
+ inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
+ if(inter_ret == 0) //name found
+ {
+ _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
+ *uid = info.userId;
+ return TRUE;
+ }
+ else if(inter_ret == -ENOENT) //name has no owner
+ {
+ _dbus_verbose ("Name %s has no owner.\n", name);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
+ }
- return ret;
+ else
+ {
+ _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
+ }
+
+ return ret;
}
-dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, DBusMessage* message, unsigned long* pid, DBusError* error)
+/*
+ * Asks kdbus for pid of the owner of the name given in the message
+ */
+dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, const char* name, unsigned long* pid, DBusError* error)
{
- char* name = NULL;
struct nameInfo info;
int inter_ret;
dbus_bool_t ret = FALSE;
- dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
if(inter_ret == 0) //name found
{
return ret;
}
+/*
+ * Asks kdbus for selinux_security_context of the owner of the name given in the message
+ */
dbus_bool_t kdbus_get_connection_unix_selinux_security_context(DBusConnection* connection, DBusMessage* message, DBusMessage* reply, DBusError* error)
{
char* name = NULL;
return ret;
}
-DBusConnection* create_phantom_connection(DBusConnection* connection, const char* unique_name, DBusError* error)
+/**
+ * Gets the UNIX user ID of the connection from kdbus, if known. Returns #TRUE if
+ * the uid is filled in. Always returns #FALSE on non-UNIX platforms
+ * for now., though in theory someone could hook Windows to NIS or
+ * something. Always returns #FALSE prior to authenticating the
+ * connection.
+ *
+ * The UID of is only read by bus daemon from kdbus. You can not
+ * call this function from client side of the connection.
+ *
+ * You can ask the bus to tell you the UID of another connection though
+ * if you like; this is done with dbus_bus_get_unix_user().
+ *
+ * @param connection the connection
+ * @param uid return location for the user ID
+ * @returns #TRUE if uid is filled in with a valid user ID
+ */
+dbus_bool_t
+dbus_connection_get_unix_user (DBusConnection *connection,
+ unsigned long *uid)
+{
+ _dbus_return_val_if_fail (connection != NULL, FALSE);
+ _dbus_return_val_if_fail (uid != NULL, FALSE);
+
+ return kdbus_get_unix_user(connection, bus_connection_get_name(connection), uid, NULL);
+}
+
+/**
+ * Gets the process ID of the connection if any.
+ * Returns #TRUE if the pid is filled in.
+ *
+ * @param connection the connection
+ * @param pid return location for the process ID
+ * @returns #TRUE if uid is filled in with a valid process ID
+ */
+dbus_bool_t
+dbus_connection_get_unix_process_id (DBusConnection *connection,
+ unsigned long *pid)
+{
+ _dbus_return_val_if_fail (connection != NULL, FALSE);
+ _dbus_return_val_if_fail (pid != NULL, FALSE);
+
+ return kdbus_get_connection_unix_process_id(connection, bus_connection_get_name(connection), pid, NULL);
+}
+
+/*
+ * Create connection structure for given name. It is needed to control starters - activatable services
+ * and for ListQueued method (as long as kdbus is not supporting it). This connections don't have it's own
+ * fd so it is set up on the basis of daemon's transport. Functionality of such connection is limited.
+ */
+DBusConnection* create_phantom_connection(DBusConnection* connection, const char* name, DBusError* error)
{
DBusConnection *phantom_connection;
- DBusString name;
+ DBusString Sname;
- _dbus_string_init_const(&name, unique_name);
+ _dbus_string_init_const(&Sname, name);
phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
if(phantom_connection == NULL)
{
dbus_connection_unref_phantom(phantom_connection);
phantom_connection = NULL;
- dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", unique_name);
+ dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", name);
goto out;
}
- if(!bus_connection_complete(phantom_connection, &name, error))
+ if(!bus_connection_complete(phantom_connection, &Sname, error))
{
bus_connection_disconnected(phantom_connection);
phantom_connection = NULL;
return phantom_connection;
}
+/*
+ * Registers activatable services as kdbus starters.
+ */
dbus_bool_t register_kdbus_starters(DBusConnection* connection)
{
int i,j, len;
int fd;
BusTransaction *transaction;
DBusString name;
+ DBusTransport* transport;
+ unsigned long int euid;
transaction = bus_transaction_new (bus_connection_get_context(connection));
if (transaction == NULL)
if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
return FALSE;
- _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
+ transport = dbus_connection_get_transport(connection);
+ euid = geteuid();
+
+ if(!_dbus_transport_get_socket_fd (transport, &fd))
+ return FALSE;
+
_dbus_string_init(&name);
for(i=0; i<len; i++)
{
- if(!register_kdbus_policy(services[i], fd))
- goto out;
+ if(!register_kdbus_policy(services[i], transport, euid))
+ goto out;
if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER) , 0) < 0)
goto out;
}
dbus_free_string_array (services);
_dbus_string_free(&name);
- bus_transaction_free(transaction);
+ bus_transaction_cancel_and_free(transaction);
return retval;
}
+/*
+ * Updates kdbus starters (activatable services) after configuration was reloaded.
+ * It releases all previous starters and registers all new.
+ */
dbus_bool_t update_kdbus_starters(DBusConnection* connection)
{
dbus_bool_t retval = FALSE;
services_old = bus_connection_get_services_owned(connection);
link = _dbus_list_get_first_link(services_old);
+ link = _dbus_list_get_next_link (services_old, link); //skip org.freedesktop.DBus which is not starter
while (link != NULL)
{
retval = TRUE;
out:
- bus_transaction_free(transaction);
+ bus_transaction_cancel_and_free(transaction);
return retval;
}
/*
-static dbus_bool_t remove_conn_if_name_match (DBusConnection *connection, void *data)
-{
- if(!strcmp(bus_connection_get_name(connection), (char*)data))
- {
- bus_connection_disconnected(connection);
- return FALSE; //this is to break foreach function
- }
- return TRUE;
-}*/
-
+ * Analyzes system broadcasts about id and name changes.
+ * Basing on this it sends NameAcquired and NameLost signals and clear phantom connections.
+ */
void handleNameOwnerChanged(DBusMessage *msg, BusTransaction *transaction, DBusConnection *connection)
{
const char *name, *old, *new;
projects / platform / upstream / dbus.git / blobdiff