-/*
- * 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
*
- * Created on: Sep 4, 2013
- * Author: r.pajak
+ * 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.
*
- * kdbus add-on to dbus daemon
+ * 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.
+ *
+ * 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 <kdbus-d.h>
#include <dbus/dbus-connection-internal.h>
+#include "kdbus-d.h"
+#define KDBUS_FOR_SBB
+#include <dbus/kdbus.h>
+#include <dbus/dbus-bus.h>
+#include "dispatch.h"
+#include <dbus/kdbus-common.h>
+#include <dbus/dbus-transport.h>
+#include <dbus/dbus-transport-kdbus.h>
+#include "connection.h"
+#include "activation.h"
+#include "services.h"
+#include <dbus/dbus-connection.h>
+
+#include <utils.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
-dbus_bool_t make_kdbus_bus(DBusBusType type, DBusError *error)
+/*
+ * 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 TRUE;
+ if(!strncmp(name, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
+ sender_id = strtoull(&name[3], NULL, 10);
+ else
+ dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Could not convert sender of the message into kdbus unique id");
+
+ return sender_id;
+}
+
+/**
+ * Seeks key in rule string, and duplicates value of the key into pValue.
+ * Because of the duplication, pValue must be freed after use.
+ *
+ * @param rule rule to look through
+ * @param key key to look for
+ * @param pValue pointer to value of the key found
+ * @return length of the value string, 0 means not found
+ */
+static int parse_match_key(const char *rule, const char* key, char** pValue)
+{
+ const char* pBegin;
+ const char* pValueEnd;
+ int value_length = 0;
+
+ pBegin = strstr(rule, key);
+ if(pBegin)
+ {
+ pBegin += strlen(key);
+ pValueEnd = strchr(pBegin, '\'');
+ if(pValueEnd)
+ {
+ value_length = pValueEnd - pBegin;
+ *pValue = strndup(pBegin, value_length);
+ if(*pValue)
+ _dbus_verbose ("found for key: %s value:'%s'\n", key, *pValue);
+ }
+ }
+ return value_length;
+}
+
+/**
+ * Adds a match rule to match broadcast messages going through the message bus.
+ * Do no affect messages addressed directly.
+ *
+ * The "rule" argument is the string form of a match rule.
+ *
+ * Only part of the dbus's matching capabilities is implemented in kdbus now, because of different mechanism.
+ * Current mapping:
+ * interface match key mapped to bloom
+ * sender match key mapped to src_name
+ *
+ * @param transport transport
+ * @param id id of connection for which the rule is to be added
+ * @param rule textual form of match rule
+ */
+dbus_bool_t add_match_kdbus (DBusTransport* transport, __u64 id, const char *rule)
+{
+ struct kdbus_cmd_match* pCmd_match;
+ struct kdbus_item *pItem;
+ __u64 src_id = KDBUS_MATCH_SRC_ID_ANY;
+ uint64_t size;
+ int name_size;
+ char* pName = NULL;
+ char* pInterface = NULL;
+ dbus_bool_t ret_value = FALSE;
+ int fd;
+ __u64 bloom_size;
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ return FALSE;
+
+ bloom_size = dbus_transport_get_bloom_size(transport);
+
+ /*parsing rule and calculating size of command*/
+ size = sizeof(struct kdbus_cmd_match);
+ if(parse_match_key(rule, "interface='", &pInterface)) /*actual size is not important for interface because bloom size is defined by bus*/
+ size += KDBUS_PART_HEADER_SIZE + bloom_size;
+ name_size = parse_match_key(rule, "sender='", &pName);
+ if(name_size)
+ {
+ if(!strncmp(pName, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
+ {
+ src_id = strtoull(&pName[3], NULL, 10);
+ free(pName);
+ pName = NULL;
+ }
+ else
+ size += KDBUS_PART_SIZE(name_size + 1); //well known name
+ }
+
+ pCmd_match = alloca(size);
+ if(pCmd_match == NULL)
+ goto out;
+
+ pCmd_match->id = id;
+ pCmd_match->cookie = id;
+ pCmd_match->size = size;
+ pCmd_match->src_id = src_id;
+
+ pItem = pCmd_match->items;
+ if(pName)
+ {
+ pItem->type = KDBUS_MATCH_SRC_NAME;
+ pItem->size = KDBUS_PART_HEADER_SIZE + name_size + 1;
+ memcpy(pItem->str, pName, strlen(pName) + 1);
+ pItem = KDBUS_PART_NEXT(pItem);
+ }
+ if(pInterface)
+ {
+ pItem->type = KDBUS_MATCH_BLOOM;
+ pItem->size = KDBUS_PART_HEADER_SIZE + bloom_size;
+ strncpy(pItem->data, pInterface, bloom_size);
+ }
+
+ if(ioctl(fd, KDBUS_CMD_MATCH_ADD, pCmd_match))
+ _dbus_verbose("Failed adding match bus rule %s,\nerror: %d, %m\n", rule, errno);
+ else
+ {
+ _dbus_verbose("Added match bus rule %s for id:%llu\n", rule, (unsigned long long)id);
+ ret_value = TRUE;
+ }
+
+out:
+ if(pName)
+ free(pName);
+ if(pInterface)
+ free(pInterface);
+ return ret_value;
+}
+
+/**
+ * Opposing to dbus, in kdbus removes all match rules with given
+ * cookie, which in this implementation is equal to uniqe id.
+ *
+ * @param transport transport
+ * @param id connection id for which rules are to be removed
+ */
+dbus_bool_t remove_match_kdbus (DBusTransport* transport, __u64 id)
+{
+ struct kdbus_cmd_match __attribute__ ((__aligned__(8))) cmd;
+ int fd;
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ return FALSE;
+
+ cmd.cookie = id;
+ cmd.id = id;
+ cmd.size = sizeof(struct kdbus_cmd_match);
+
+ if(ioctl(fd, KDBUS_CMD_MATCH_REMOVE, &cmd))
+ {
+ _dbus_verbose("Failed removing match rule for id: %llu; error: %d, %m\n", (unsigned long long)id, errno);
+ return FALSE;
+ }
+ else
+ {
+ _dbus_verbose("Match rule removed correctly.\n");
+ return TRUE;
+ }
+}
+
+/**
+ * Performs kdbus query of id of the given name
+ *
+ * @param name name to query for
+ * @param transport transport
+ * @param pInfo nameInfo structure address to store info about the name
+ * @return 0 on success, -errno if failed
+ */
+int kdbus_NameQuery(const char* name, DBusTransport* transport, struct nameInfo* pInfo)
+{
+ struct kdbus_cmd_conn_info *cmd;
+ int ret;
+ int fd;
+ uint64_t size;
+ __u64 id = 0;
+
+ pInfo->sec_label_len = 0;
+ pInfo->sec_label = NULL;
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ return -EPERM;
+
+ size = sizeof(struct kdbus_cmd_conn_info);
+ if((name[0] == ':') && (name[1] == '1') && (name[2] == '.')) /* if name starts with ":1." it is a unique name and should be send as number */
+ id = strtoull(&name[3], NULL, 10);
+ if(id == 0)
+ size += strlen(name) + 1;
+
+ cmd = alloca(size);
+ if (!cmd)
+ {
+ _dbus_verbose("Error allocating memory for: %s,%s\n", _dbus_strerror (errno), _dbus_error_from_errno (errno));
+ return -errno;
+ }
+
+ cmd->size = size;
+ cmd->id = id;
+ if(id == 0)
+ memcpy(cmd->name, name, strlen(name) + 1);
+
+ again:
+ ret = ioctl(fd, KDBUS_CMD_CONN_INFO, cmd);
+ if (ret < 0)
+ {
+ if(errno == EINTR)
+ goto again;
+ pInfo->uniqueId = 0;
+ return -errno;
+ }
+ else
+ {
+ struct kdbus_conn_info *info;
+ struct kdbus_item *item;
+
+ info = (struct kdbus_conn_info *)((char*)dbus_transport_get_pool_pointer(transport) + cmd->offset);
+ pInfo->uniqueId = info->id;
+
+ item = info->items;
+ while((uint8_t *)(item) < (uint8_t *)(info) + info->size)
+ {
+ if(item->type == KDBUS_ITEM_CREDS)
+ {
+ pInfo->userId = item->creds.uid;
+ pInfo->processId = item->creds.uid;
+ }
+
+ if(item->type == KDBUS_ITEM_SECLABEL)
+ {
+ pInfo->sec_label_len = item->size - KDBUS_PART_HEADER_SIZE - 1;
+ if(pInfo->sec_label_len != 0)
+ {
+ pInfo->sec_label = malloc(pInfo->sec_label_len);
+ if(pInfo->sec_label == NULL)
+ ret = -1;
+ else
+ memcpy(pInfo->sec_label, item->data, pInfo->sec_label_len);
+ }
+ }
+
+ item = KDBUS_PART_NEXT(item);
+ }
+
+ again2:
+ if (ioctl(fd, KDBUS_CMD_FREE, &cmd->offset) < 0)
+ {
+ if(errno == EINTR)
+ goto again2;
+ _dbus_verbose("kdbus error freeing pool: %d (%m)\n", errno);
+ return -errno;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Creates kdbus bus of given type.
+ */
+char* make_kdbus_bus(DBusBusType type, const char* address, DBusError *error)
+{
+ // TODO Function alloca() used. In upstream there was a patch proposing to
+ // replace alloca() with malloc() to assure memory alignment. If there will be
+ // suggestion to use malloc instead of alloca this function has to be modified
+ struct kdbus_cmd_bus_make *bus_make;
+ struct kdbus_item *item;
+ __u64 name_size, item_size, bus_make_size;
+ int fdc, ret;
+ char *addr_value = NULL;
+ char *bus = NULL;
+ char *name = NULL;
+
+ if(type == DBUS_BUS_SYSTEM)
+ name_size = snprintf(name, 0, "%u-kdbus-%s", getuid(), "system") + 1;
+ else if(type == DBUS_BUS_SESSION)
+ name_size = snprintf(name, 0, "%u-kdbus", getuid()) + 1;
+ else
+ name_size = snprintf(name, 0, "%u-kdbus-%u", getuid(), getpid()) + 1;
+
+ name = alloca(name_size);
+ if (!name)
+ {
+ return NULL;
+ }
+
+ item_size = KDBUS_PART_HEADER_SIZE + name_size;
+ bus_make_size = sizeof(struct kdbus_cmd_bus_make) + item_size;
+
+ bus_make = alloca(bus_make_size);
+ if (!bus_make)
+ {
+ return NULL;
+ }
+
+ item = bus_make->items;
+ item->size = item_size;
+ item->type = KDBUS_ITEM_MAKE_NAME;
+
+ if(type == DBUS_BUS_SYSTEM)
+ sprintf(name, "%u-kdbus-%s", getuid(), "system");
+ else if(type == DBUS_BUS_SESSION)
+ sprintf(name, "%u-kdbus", getuid());
+ else
+ sprintf(name, "%u-kdbus-%u", getuid(), getpid());
+
+ memcpy((bus_make->items)->str, name, name_size);
+
+ bus_make->bloom_size = 64;
+ bus_make->size = bus_make_size;
+
+#ifdef POLICY_TO_KDBUS
+ bus_make->flags = KDBUS_MAKE_ACCESS_WORLD;
+#else
+ bus_make->flags = KDBUS_MAKE_POLICY_OPEN;
+#endif
+
+ addr_value = strchr(address, ':') + 1;
+ if(*addr_value)
+ {
+ if(!strcmp(addr_value, "sbb"))
+ bus_make->flags |= KDBUS_MAKE_SBB_OFFSET;
+ else
+ {
+ dbus_set_error_const(error, DBUS_ERROR_BAD_ADDRESS, "Invalid address parameter.");
+ return NULL;
+ }
+ }
+
+ _dbus_verbose("Opening /dev/kdbus/control\n");
+ fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
+ if (fdc < 0)
+ {
+ _dbus_verbose("--- error %d (%m)\n", fdc);
+ dbus_set_error(error, DBUS_ERROR_FAILED, "Opening /dev/kdbus/control failed: %d (%m)", fdc);
+ return NULL;
+ }
+
+ _dbus_verbose("Creating bus '%s'\n", (bus_make->items[0]).str);
+ ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, bus_make);
+ if (ret)
+ {
+ _dbus_verbose("--- error %d (%m)\n", errno);
+ dbus_set_error(error, DBUS_ERROR_FAILED, "Creating bus '%s' failed: %d (%m)",
+ (bus_make->items[0]).str, errno);
+ return NULL;
+ }
+
+ if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", (bus_make->items[0]).str) < 0)
+ {
+ BUS_SET_OOM (error);
+ return NULL;
+ }
+
+ _dbus_verbose("Return value '%s'\n", bus);
+ return bus;
+}
+
+/*
+ * Minimal server init needed by context to go further.
+ */
+DBusServer* empty_server_init(char* address)
+{
+ return dbus_server_init_mini(address);
+}
+
+static dbus_bool_t add_matches_for_kdbus_broadcasts(DBusConnection* connection)
+{
+ struct kdbus_cmd_match* pCmd_match;
+ struct kdbus_item *pItem;
+ uint64_t size;
+ int fd;
+ DBusTransport *transport;
+ const char* unique_name;
+
+ transport = dbus_connection_get_transport(connection);
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ {
+ errno = EPERM;
+ return FALSE;
+ }
+
+ size = sizeof(struct kdbus_cmd_match);
+ size += KDBUS_PART_SIZE(1)*3 + KDBUS_PART_SIZE(sizeof(__u64))*2; /*3 name related items plus 2 id related items*/
+
+ pCmd_match = alloca(size);
+ if(pCmd_match == NULL)
+ {
+ errno = ENOMEM;
+ return FALSE;
+ }
+
+ unique_name = dbus_bus_get_unique_name(connection);
+
+ pCmd_match->id = strtoull(&unique_name[3], NULL, 10);
+ pCmd_match->cookie = 1;
+ pCmd_match->size = size;
+
+ pItem = pCmd_match->items;
+ pCmd_match->src_id = 0;
+ pItem->type = KDBUS_MATCH_NAME_CHANGE;
+ pItem->size = KDBUS_PART_HEADER_SIZE + 1;
+ pItem = KDBUS_PART_NEXT(pItem);
+ pItem->type = KDBUS_MATCH_NAME_ADD;
+ pItem->size = KDBUS_PART_HEADER_SIZE + 1;
+ pItem = KDBUS_PART_NEXT(pItem);
+ pItem->type = KDBUS_MATCH_NAME_REMOVE;
+ pItem->size = KDBUS_PART_HEADER_SIZE + 1;
+ pItem = KDBUS_PART_NEXT(pItem);
+ pItem->type = KDBUS_MATCH_ID_ADD;
+ pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
+ pItem = KDBUS_PART_NEXT(pItem);
+ pItem->type = KDBUS_MATCH_ID_REMOVE;
+ pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
+
+ if(ioctl(fd, KDBUS_CMD_MATCH_ADD, pCmd_match))
+ {
+ _dbus_verbose("Failed adding match rule for daemon, error: %d, %m\n", errno);
+ return FALSE;
+ }
+
+ _dbus_verbose("Added match rule for daemon correctly.\n");
+ return TRUE;
+}
+
+/*
+ * 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;
+
+ dbus_bus_set_bus_connection_address(type, address);
+
+ connection = dbus_bus_get_private(type, error); /*todo possibly could be optimised by using lower functions*/
+ if(connection == NULL)
+ return NULL;
+
+ if(!add_matches_for_kdbus_broadcasts(connection))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for daemon, %s", _dbus_strerror_from_errno ());
+ goto failed;
+ }
+
+ if(dbus_error_is_set(error))
+ {
+ failed:
+ _dbus_connection_close_possibly_shared (connection);
+ dbus_connection_unref (connection);
+ connection = NULL;
+ }
+ else
+ _dbus_verbose ("Daemon connected as kdbus client.\n");
+
+ return connection;
+}
+
+/*
+ * Asks bus for org.freedesktop.DBus well-known name.
+ */
+dbus_bool_t register_daemon_name(DBusConnection* connection)
+{
+ DBusString daemon_name;
+ dbus_bool_t retval = FALSE;
+ BusTransaction *transaction;
+
+ _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
+#ifdef POLICY_TO_KDBUS
+ if(!register_kdbus_policy(DBUS_SERVICE_DBUS, dbus_connection_get_transport(connection), geteuid()))
+ return FALSE;
+#endif
+
+ 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;
+
+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)
+{
+ int fd;
+
+ _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
+
+ return request_kdbus_name(fd, _dbus_string_get_const_data(service_name), flags, sender_id);
+}
+
+dbus_uint32_t kdbus_release_name(DBusConnection* connection, const DBusString *service_name, __u64 sender_id)
+{
+ int fd;
+
+ _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
+
+ 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_name_list __attribute__ ((__aligned__(8))) cmd;
+ struct kdbus_name_list *name_list;
+ struct kdbus_cmd_name *name;
+ DBusTransport *transport = dbus_connection_get_transport(connection);
+ dbus_bool_t ret_val = FALSE;
+ char** list;
+ int list_len = 0;
+ int i = 0;
+ int j;
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ return FALSE;
+
+ cmd.flags = KDBUS_NAME_LIST_NAMES | KDBUS_NAME_LIST_UNIQUE;
+
+again:
+ if(ioctl(fd, KDBUS_CMD_NAME_LIST, &cmd))
+ {
+ if(errno == EINTR)
+ goto again;
+ else
+ {
+ _dbus_verbose("kdbus error asking for name list: err %d (%m)\n",errno);
+ return FALSE;
+ }
+ }
+
+ name_list = (struct kdbus_name_list *)((char*)dbus_transport_get_pool_pointer(transport) + cmd.offset);
+
+ for (name = name_list->names; (uint8_t *)(name) < (uint8_t *)(name_list) + name_list->size; name = KDBUS_PART_NEXT(name))
+ list_len++;
+
+ _dbus_verbose ("List len: %d\n", list_len);
+
+ list = malloc(sizeof(char*) * (list_len + 1));
+ if(list == NULL)
+ goto out;
+
+ for (name = name_list->names; (uint8_t *)(name) < (uint8_t *)(name_list) + name_list->size; name = KDBUS_PART_NEXT(name))
+ {
+ if(*name->name)
+ {
+ list[i] = strdup(name->name);
+ if(list[i] == NULL)
+ goto out;
+ }
+ else
+ {
+ list[i] = malloc(snprintf(list[i], 0, ":1.%llu0", (unsigned long long)name->id));
+ if(list[i] == NULL)
+ goto out;
+ sprintf(list[i], ":1.%llu", (unsigned long long int)name->id);
+ }
+ _dbus_verbose ("Name %d: %s\n", i, list[i]);
+ ++i;
+ }
+
+ list[i] = NULL;
+ *array_len = list_len;
+ *listp = list;
+ ret_val = TRUE;
+
+out:
+ if (ioctl(fd, KDBUS_CMD_FREE, &cmd.offset) < 0)
+ {
+ if(errno == EINTR)
+ goto out;
+ _dbus_verbose("kdbus error freeing pool: %d (%m)\n", errno);
+ ret_val = FALSE;
+ }
+ if(ret_val == FALSE)
+ {
+ for(j=0; j<i; j++)
+ free(list[j]);
+ free(list);
+ *array_len = 0;
+ *listp = NULL;
+ }
+
+ return ret_val;
+}
+
+/*
+ * Asks kdbus for list of connections being in the queue to own
+ * given well-known name. The list includes the owner of the name on the
+ * first position.
+ */
+dbus_bool_t kdbus_list_queued (DBusConnection *connection, DBusList **return_list,
+ const char *name, DBusError *error)
+{
+ int fd;
+ dbus_bool_t ret_val = FALSE;
+ int name_length;
+ struct kdbus_cmd_conn_info *pCmd;
+ __u64 cmd_size;
+ DBusTransport *transport = dbus_connection_get_transport(connection);
+ struct kdbus_name_list *name_list;
+ struct kdbus_cmd_name *owner;
+
+ _dbus_assert (*return_list == NULL);
+
+ name_length = strlen(name) + 1;
+ cmd_size = sizeof(struct kdbus_cmd_conn_info) + name_length;
+ pCmd = alloca(cmd_size);
+ if(pCmd == NULL)
+ goto out;
+ pCmd->size = cmd_size;
+ pCmd->id = 0;
+ memcpy(pCmd->name, name, name_length);
+
+ _dbus_verbose ("Asking for queued owners of %s\n", pCmd->name);
+
+ _dbus_transport_get_socket_fd(transport, &fd);
+
+ again:
+ if(ioctl(fd, KDBUS_CMD_NAME_LIST_QUEUED, pCmd))
+ {
+ if(errno == EINTR)
+ goto again;
+ else if(errno == ESRCH)
+ {
+ dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
+ "Could not get owners of name '%s': no such name", name);
+ return FALSE;
+ }
+ else
+ {
+ _dbus_verbose("kdbus error asking for queued owners list: err %d (%m)\n",errno);
+ goto out;
+ }
+ }
+
+ name_list = (struct kdbus_name_list *)((char*)dbus_transport_get_pool_pointer(transport) + pCmd->offset);
+
+ for (owner = name_list->names; (uint8_t *)(owner) < (uint8_t *)(name_list) + name_list->size; owner = KDBUS_PART_NEXT(owner))
+ {
+ char *uname = NULL;
+
+ _dbus_verbose ("Got queued owner id: %llu\n", (unsigned long long)owner->id);
+ uname = malloc(snprintf(uname, 0, ":1.%llu0", (unsigned long long)owner->id));
+ if(uname == NULL)
+ goto out;
+ sprintf(uname, ":1.%llu", (unsigned long long int)owner->id);
+ if (!_dbus_list_append (return_list, uname))
+ goto out;
+ }
+
+ ret_val = TRUE;
+
+ out:
+ if (ioctl(fd, KDBUS_CMD_FREE, &pCmd->offset) < 0)
+ {
+ if(errno == EINTR)
+ goto out;
+ _dbus_verbose("kdbus error freeing pool: %d (%m)\n", errno);
+ ret_val = FALSE;
+ }
+ if(ret_val == FALSE)
+ {
+ DBusList *link;
+
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to list queued owners of \"%s\": %s",
+ name, _dbus_strerror (errno));
+
+ link = _dbus_list_get_first_link (return_list);
+ while (link != NULL)
+ {
+ DBusList *next = _dbus_list_get_next_link (return_list, link);
+
+ if(link->data != NULL)
+ free(link->data);
+
+ _dbus_list_free_link (link);
+ link = next;
+ }
+ }
+
+ return ret_val;
}
-DBusConnection* daemon_as_client(DBusBusType type, DBusError *error)
+/*
+ * 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)
{
- DBusConnection* connection;
+ __u64 sender_id;
- connection = dbus_bus_get(type, error);
- if(connection == NULL)
- return NULL;
+ sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
+ if(dbus_error_is_set(error))
+ return FALSE;
- if(dbus_bus_request_name(connection, DBUS_SERVICE_DBUS, 0, error) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
- goto failed;
+ if(!add_match_kdbus (dbus_connection_get_transport(connection), sender_id, text))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:%d, %s",
+ sender_id, _dbus_strerror_from_errno ());
+ return FALSE;
+ }
- dbus_bus_add_match(connection, "type='signal', member='NameAcquired'", error);
- dbus_bus_add_match(connection, "type='signal', member='NameLost'", error);
+ 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;
+
+ sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
if(dbus_error_is_set(error))
- goto failed;
+ return FALSE;
+
+ if(!remove_match_kdbus (dbus_connection_get_transport(connection), sender_id))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno), "Could not remove match rules for id:%d", sender_id);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+int kdbus_get_name_owner(DBusConnection* connection, const char* name, char* owner)
+{
+ 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) && (ret != -ENXIO))
+ _dbus_verbose("kdbus error sending name query: err %d (%m)\n", ret);
+
+ return ret;
+}
+
+/*
+ * 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) || (inter_ret == -ENXIO)) //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);
+ }
+
+ 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;
+}
+
+/*
+ * 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)
+{
+ 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("Process id:%llu\n", (unsigned long long) info.processId);
+ *pid = info.processId;
+ return TRUE;
+ }
+ else if((inter_ret == -ENOENT) || (inter_ret == -ENXIO)) //name has no owner
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
+ else
+ {
+ _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
+ }
+
+ 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;
+ 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 == -ENOENT) || (inter_ret == -ENXIO)) //name has no owner
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get security context of name '%s': no such name", name);
+ else if(inter_ret < 0)
+ {
+ _dbus_verbose("kdbus error determining security context: err %d (%m)\n", errno);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine security context for '%s'", name);
+ }
+ else
+ {
+ if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
+ {
+ _DBUS_SET_OOM (error);
+ return FALSE;
+ }
+ ret = TRUE;
+ }
+
+ return ret;
+}
+
+/**
+ * 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);
+
+ if(bus_context_is_kdbus(bus_connection_get_context (connection)))
+ return kdbus_get_unix_user(connection, bus_connection_get_name(connection), uid, NULL);
+
+ return dbus_connection_get_unix_user_dbus(connection, uid);
+}
+
+/**
+ * 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);
+
+ if(bus_context_is_kdbus(bus_connection_get_context (connection)))
+ return kdbus_get_connection_unix_process_id(connection, bus_connection_get_name(connection), pid, NULL);
+
+ return dbus_connection_get_unix_process_id_dbus(connection, pid);
+}
+
+/*
+ * 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 Sname;
+
+ _dbus_string_init_const(&Sname, name);
+
+ phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
+ if(phantom_connection == NULL)
+ return FALSE;
+ if(!bus_connections_setup_connection(bus_connection_get_connections(connection), phantom_connection))
+ {
+ dbus_connection_unref_phantom(phantom_connection);
+ phantom_connection = NULL;
+ dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", name);
+ goto out;
+ }
+ if(!bus_connection_complete(phantom_connection, &Sname, error))
+ {
+ bus_connection_disconnected(phantom_connection);
+ phantom_connection = NULL;
+ goto out;
+ }
+
+ _dbus_verbose ("Created phantom connection for %s\n", bus_connection_get_name(phantom_connection));
+
+out:
+ return phantom_connection;
+}
+
+/*
+ * Registers activatable services as kdbus starters.
+ */
+dbus_bool_t register_kdbus_starters(DBusConnection* connection)
+{
+ int i,j, len;
+ char **services;
+ dbus_bool_t retval = FALSE;
+ int fd;
+ BusTransaction *transaction;
+ DBusString name;
+ DBusTransport* transport;
+
+ transaction = bus_transaction_new (bus_connection_get_context(connection));
+ if (transaction == NULL)
+ return FALSE;
+
+ if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
+ return FALSE;
+
+ transport = dbus_connection_get_transport(connection);
+
+ if(!_dbus_transport_get_socket_fd (transport, &fd))
+ return FALSE;
+
+ _dbus_string_init(&name);
+
+ for(i=0; i<len; i++)
+ {
+#ifdef POLICY_TO_KDBUS
+ if(!register_kdbus_policy(services[i], transport, geteuid()))
+ goto out;
+#endif
+
+ if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER_NAME) , 0) < 0)
+ goto out;
+
+ if(!_dbus_string_append(&name, services[i]))
+ goto out;
+ if(!bus_registry_ensure (bus_connection_get_registry (connection), &name, connection,
+ (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER_NAME), transaction, NULL))
+ goto out;
+ if(!_dbus_string_set_length(&name, 0))
+ goto out;
+ }
+ retval = TRUE;
+
+out:
+ if(retval == FALSE)
+ {
+ for(j=0; j<i; j++)
+ release_kdbus_name(fd, services[j], 0);
+ }
+ dbus_free_string_array (services);
+ _dbus_string_free(&name);
+ 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;
+ DBusList **services_old;
+ DBusList *link;
+ BusService *service = NULL;
+ BusTransaction *transaction;
+ int fd;
+
+ transaction = bus_transaction_new (bus_connection_get_context(connection));
+ if (transaction == NULL)
+ return FALSE;
+
+ if(!_dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd))
+ goto out;
+
+ 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)
+ {
+ int ret;
+
+ service = (BusService*) link->data;
+ if(service == NULL)
+ goto out;
+
+ ret = release_kdbus_name(fd, bus_service_get_name(service), 0);
+
+ if (ret == DBUS_RELEASE_NAME_REPLY_RELEASED)
+ {
+ if(!bus_service_remove_owner(service, connection, transaction, NULL))
+ _dbus_verbose ("Unable to remove\n");
+ }
+ else if(ret < 0)
+ goto out;
+
+ link = _dbus_list_get_next_link (services_old, link);
+ }
+
+ if(!register_kdbus_starters(connection))
+ {
+ _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
+ goto out;
+ }
+ retval = TRUE;
+
+out:
+ bus_transaction_cancel_and_free(transaction);
+ return retval;
+}
+
+/*
+ * 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;
+
+ if(!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &old, DBUS_TYPE_STRING, &new, DBUS_TYPE_INVALID))
+ {
+ _dbus_verbose ("Couldn't get args of NameOwnerChanged signal.\n");//, error.message);
+ return;
+ }
+
+ _dbus_verbose ("Got NameOwnerChanged signal:\nName: %s\nOld: %s\nNew: %s\n", name, old, new);
+
+ if(!strncmp(name, ":1.", 3))/*if it starts from :1. it is unique name - this might be IdRemoved info*/
+ {
+ if(!strcmp(name, old)) //yes it is - someone has disconnected
+ {
+ DBusConnection* conn;
+
+ conn = bus_connections_find_conn_by_name(bus_connection_get_connections(connection), name);
+ if(conn)
+ bus_connection_disconnected(conn);
+ }
+ }
+ else //it is well-known name
+ {
+ if((*old != 0) && (strcmp(old, bus_connection_get_name(connection))))
+ {
+ DBusMessage *message;
+
+ if(bus_connections_find_conn_by_name(bus_connection_get_connections(connection), old) == NULL)
+ goto next;
+
+ _dbus_verbose ("Owner '%s' lost name '%s'. Sending NameLost.\n", old, name);
+
+ message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameLost");
+ if (message == NULL)
+ goto next;
+
+ if (!dbus_message_set_destination (message, old) || !dbus_message_append_args (message,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID))
+ {
+ dbus_message_unref (message);
+ goto next;
+ }
+
+ bus_transaction_send_from_driver (transaction, connection, message);
+ dbus_message_unref (message);
+ }
+ next:
+ if((*new != 0) && (strcmp(new, bus_connection_get_name(connection))))
+ {
+ DBusMessage *message;
+
+ _dbus_verbose ("Owner '%s' acquired name '%s'. Sending NameAcquired.\n", new, name);
+
+ message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameAcquired");
+ if (message == NULL)
+ return;
+
+ if (!dbus_message_set_destination (message, new) || !dbus_message_append_args (message,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID))
+ {
+ dbus_message_unref (message);
+ return;
+ }
- return connection;
+ bus_transaction_send_from_driver (transaction, connection, message);
+ dbus_message_unref (message);
+ }
+ }
-failed:
- _dbus_connection_close_possibly_shared (connection);
- dbus_connection_unref (connection);
- connection = NULL;
- return NULL;
+ if(bus_transaction_send(transaction, connection, msg))
+ _dbus_verbose ("NameOwnerChanged sent\n");
+ else
+ _dbus_verbose ("Sending NameOwnerChanged failed\n");
}
projects / platform / upstream / dbus.git / blobdiff