1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-transport-kdbus.c kdbus subclasses of DBusTransport
4 * Copyright (C) 2002, 2003, 2004, 2006 Red Hat Inc
5 * Copyright (C) 2013 Samsung Electronics
7 * Licensed under the Academic Free License version 2.1
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version and under the terms of the GNU
13 * Lesser General Public License as published by the
14 * Free Software Foundation; either version 2.1 of the License, or (at
15 * your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "dbus-transport.h"
29 #include "dbus-transport-kdbus.h"
30 #include "dbus-transport-protected.h"
31 #include "dbus-connection-internal.h"
32 #include "dbus-marshal-gvariant.h"
33 #include "dbus-marshal-validate.h"
34 #include "dbus-asv-util.h"
35 #include <linux/kdbus.h>
36 #include "dbus-watch.h"
37 #include "dbus-errors.h"
39 #include "kdbus-common.h"
40 #include "dbus-protocol-gvariant.h"
41 #include <linux/types.h>
49 #include <sys/syscall.h>
52 #include <dbuspolicy/libdbuspolicy1.h>
53 #include "dbus-marshal-header.h"
54 #include "dbus-protocol-gvariant.h"
56 #include "dbus-sysdeps-unix.h"
58 #include <linux/version.h>
59 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
60 # if defined(__arm__) || defined(__aarch64__)
61 # define __NR_memfd_create 385
62 # elif defined(__i386__) || defined(__x86_64__)
63 # define __NR_memfd_create 279
65 # error "Architecture not supported"
68 # include <linux/memfd.h>
71 #ifdef DBUS_ENABLE_VERBOSE_MODE
75 /* FIXME shouldn't it be in fcntl.h header file? copied from systemd's missing.h */
76 #ifndef F_LINUX_SPECIFIC_BASE
77 #define F_LINUX_SPECIFIC_BASE 1024
81 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
82 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
84 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
85 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
86 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
87 #define F_SEAL_WRITE 0x0008 /* prevent writes */
91 #define MFD_CLOEXEC 0x0001U
94 #ifndef MFD_ALLOW_SEALING
95 #define MFD_ALLOW_SEALING 0x0002U
98 /* ALIGN8 and KDBUS_FOREACH taken from systemd */
99 #define ALIGN8(l) (((l) + 7) & ~7)
100 #define KDBUS_FOREACH(iter, first, _size) \
101 for (iter = (first); \
102 ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) && \
103 ((uint8_t *)(iter) >= (uint8_t *)(first)); \
104 iter = (void*)(((uint8_t *)iter) + ALIGN8((iter)->size)))
105 #define KDBUS_INFINITE_TIMEOUT_NS 0x3fffffffffffffffLLU
108 * @defgroup DBusTransportKdbus DBusTransport implementations for kdbus
109 * @ingroup DBusInternals
110 * @brief Implementation details of DBusTransport on kdbus
115 /** Default Size of the memory area for received non-memfd messages. */
116 #define RECEIVE_POOL_SIZE_DEFAULT_SIZE (16 * 1024LU * 1024LU)
117 /** Name of environmental variable to define receive pool size*/
118 #define RECEIVE_POOL_SIZE_ENV_VAR_NAME "KDBUS_MEMORY_POOL_SIZE"
119 /** Max size of pool size in megabytes*/
120 #define RECEIVE_POOL_SIZE_MAX_MBYTES 64
121 /** Min size of pool size in kilobytes*/
122 #define RECEIVE_POOL_SIZE_MIN_KBYTES 16
124 /** Over this memfd is used to send (if it is not broadcast). */
125 #define MEMFD_SIZE_THRESHOLD (512 * 1024LU)
127 /** Define max bytes read or written in one iteration.
128 * This is to avoid blocking on reading or writing for too long. It is checked after each message is sent or received,
129 * so if message is bigger than MAX_BYTES_PER_ITERATION it will be handled in one iteration, but sending/writing
130 * will break after that message.
132 #define MAX_BYTES_PER_ITERATION 16384
134 #if (MEMFD_SIZE_THRESHOLD > KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE)
135 #error Memfd size threshold higher than max kdbus message payload vector size
138 /** Enables verbosing more information about kdbus message.
139 * Works only if DBUS_VERBOSE=1 is used.
141 #define KDBUS_MSG_DECODE_DEBUG 0
144 * Opaque object representing a transport.
146 typedef struct DBusTransportKdbus DBusTransportKdbus;
149 * Implementation details of DBusTransportKdbus. All members are private.
151 struct DBusTransportKdbus
153 DBusTransport base; /**< Parent instance */
154 kdbus_t *kdbus; /**< kdbus data for low level operations */
155 DBusWatch *read_watch; /**< Watch for readability. */
156 DBusWatch *write_watch; /**< Watch for writability. */
158 int max_bytes_read_per_iteration; /**< To avoid blocking too long. */
159 int max_bytes_written_per_iteration; /**< To avoid blocking too long. */
161 char* my_DBus_unique_name; /**< unique name in DBus string format - :1.x , where x is kdbus id*/
162 char* activator; /**< well known name for activator */
163 Matchmaker *matchmaker; /**< for match rules management */
164 dbus_uint32_t client_serial; /**< serial number for messages synthesized by library*/
171 * Creates unique name string frong unique id.
173 * @param id unique id
174 * @returns allocated string with unique name
176 * Caller has to free allocated string with free.
179 create_unique_name_from_unique_id (unsigned long long id)
182 if (asprintf (&str, ":1.%llu", id) == -1)
188 * Puts locally generated message into received messages queue
189 * @param message message that will be added
190 * @param connection connection to which message will be added
191 * @returns TRUE on success, FALSE on memory allocation error
194 add_message_to_received (DBusMessage *message,
195 DBusConnection *connection)
197 DBusList *message_link;
199 message_link = _dbus_list_alloc_link (message);
200 if (message_link == NULL)
202 dbus_message_unref (message);
206 dbus_message_lock (message);
208 _dbus_connection_queue_synthesized_message_link (connection, message_link);
213 reply_with_error_preset_sender (const char *error_type,
214 const char *template,
216 DBusMessage *message,
219 DBusMessage *errMessage;
220 char* error_msg = "";
224 size_t len = strlen (template) + strlen (object) + 1;
225 error_msg = alloca (len);
226 snprintf (error_msg, len, template, object);
229 error_msg = (char*)object;
231 errMessage = _dbus_generate_local_error_message ( dbus_message_get_serial (message),
235 if (errMessage == NULL)
239 dbus_message_set_sender (errMessage, sender);
245 * Generates local error message as a reply to message given as parameter
246 * and adds generated error message to received messages queue.
247 * @param error_type type of error, preferably DBUS_ERROR_(...)
248 * @param template Template of error description. It can has formatting
249 * characters to print object string into it. Can be NULL.
250 * @param object String to print into error description. Can be NULL.
251 * If object is not NULL while template is NULL, the object string
252 * will be the only error description.
253 * @param message Message for which the error reply is generated.
254 * @returns local error message on success, otherwise NULL
257 reply_with_error (const char *error_type,
258 const char *template,
260 DBusMessage *message)
262 return reply_with_error_preset_sender (error_type, template,
263 object, message, NULL);
267 * Generates reply to the message given as a parameter with one item in the reply body
268 * and adds generated reply message to received messages queue.
269 * @param message The message we are replying to.
270 * @param data_type Type of data sent in the reply.Use DBUS_TYPE_(...)
271 * @param pData Address of data sent in the reply.
272 * @returns generated reply on success, otherwise NULL
275 reply_1_data (DBusMessage *message,
279 DBusMessageIter args;
282 reply = dbus_message_new_method_return (message);
286 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
289 dbus_message_iter_init_append (reply, &args);
290 if (!dbus_message_iter_append_basic (&args, data_type, pData))
296 dbus_message_unref (reply);
302 reply_fixed_array (DBusMessage *message,
307 DBusMessageIter args, array_iter;
310 reply = dbus_message_new_method_return (message);
314 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
317 dbus_message_iter_init_append (reply, &args);
319 if (!dbus_message_iter_open_container (&args,
321 DBUS_TYPE_BYTE_AS_STRING,
325 if (!dbus_message_iter_append_fixed_array (&array_iter, element_type, &data, n_elements))
328 if (!dbus_message_iter_close_container (&args, &array_iter))
334 dbus_message_iter_abandon_container (&args, &array_iter);
337 dbus_message_unref (reply);
342 * Retrieves file descriptor to memory pool from kdbus module and stores
343 * it in kdbus_transport->memfd. It is then used to send large message.
344 * Triggered when message payload is over MEMFD_SIZE_THRESHOLD
345 * @param kdbus_transport DBusTransportKdbus transport structure
346 * @returns 0 on success, otherwise -1
349 kdbus_acquire_memfd ( void )
353 /* FIXME add HAVE_MEMFD_CREATE */
354 if ((fd = syscall (__NR_memfd_create, "kdbus", MFD_ALLOW_SEALING | MFD_CLOEXEC )) < 0)
356 _dbus_verbose ("memfd_create failed (%d): %m\n", fd);
359 _dbus_verbose ("%s: memfd=%d\n", __FUNCTION__, fd);
364 bloom_add_pair (kdbus_bloom_data_t *bloom_data,
366 const char *parameter,
375 size = strlen (parameter) + strlen (value) + 1;
379 snprintf (buf, size + 1, "%s:%s", parameter, value);
380 _kdbus_bloom_add_data (kdbus, bloom_data, buf, size);
384 bloom_add_prefixes (kdbus_bloom_data_t *bloom_data,
386 const char *parameter,
393 size = strlen (parameter) + strlen (value) + 1;
397 snprintf (buf, size + 1, "%s:%s", parameter, value);
402 last_sep = strrchr (buf, separator);
403 if (!last_sep || last_sep == buf)
407 _kdbus_bloom_add_data (kdbus, bloom_data, buf, last_sep-buf);
412 setup_bloom_filter_for_message (DBusMessage *msg,
414 struct kdbus_bloom_filter *bloom_filter)
416 kdbus_bloom_data_t *bloom_data;
419 DBusMessageIter args;
422 _dbus_assert (bloom_filter);
424 bloom_data = _kdbus_bloom_filter_get_data (bloom_filter);
426 bloom_add_pair (bloom_data,
429 dbus_message_type_to_string (dbus_message_get_type (msg)));
431 bloom_add_pair (bloom_data, kdbus, "interface", dbus_message_get_interface (msg));
432 bloom_add_pair (bloom_data, kdbus, "member", dbus_message_get_member (msg));
433 str = dbus_message_get_path (msg);
436 bloom_add_pair (bloom_data, kdbus, "path", str);
437 bloom_add_pair (bloom_data, kdbus, "path-slash-prefix", str);
438 bloom_add_prefixes (bloom_data, kdbus, "path-slash-prefix", str, '/');
441 if (!dbus_message_iter_init (msg, &args))
444 for (i = 0; i < 64; i++)
447 char buf[sizeof ("arg")-1 + 2 + sizeof ("-slash-prefix")];
451 type = dbus_message_iter_get_arg_type (&args);
452 if (type != DBUS_TYPE_STRING &&
453 type != DBUS_TYPE_OBJECT_PATH &&
454 type != DBUS_TYPE_SIGNATURE)
457 dbus_message_iter_get_basic (&args, &str);
459 snprintf (buf, sizeof (buf), "arg%d", i);
461 bloom_add_pair (bloom_data, kdbus, buf, str);
463 /* point e to end of string, we will add suffixes */
466 /* we need remaining length of the buffer */
467 len = sizeof (buf) - len;
469 strncpy (e, "-dot-prefix", len);
470 bloom_add_prefixes (bloom_data, kdbus, buf, str, '.');
471 strncpy (e, "-slash-prefix", len);
472 bloom_add_prefixes (bloom_data, kdbus, buf, str, '/');
474 if (!dbus_message_iter_next (&args))
482 * Checks if a string is a unique name or well known name.
484 * @param name a valid D-Bus name
485 * @returns 0 for well-known names, otherwise unique id
488 parse_name (const char *name)
490 dbus_uint64_t unique_id = 0;
492 /* if name is unique name it must be converted to unique id */
493 if (strncmp (name, ":1.", 3) == 0)
496 unique_id = strtoull (&name[3], &endptr, 10);
498 if (unique_id == 0 || *endptr != '\0' || errno == ERANGE)
506 prepare_mfd (int memfd,
512 _dbus_verbose ("sending data via memfd\n");
515 wr = write (memfd, body, body_size);
518 _dbus_verbose ("writing to memfd failed: (%d) %m\n", errno);
525 // seal data - kdbus module needs it
526 if (fcntl (memfd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL) < 0)
528 _dbus_verbose ("memfd sealing failed: %d (%m)\n", errno);
535 send_message (DBusTransportKdbus *transport,
536 struct kdbus_msg *kdbus_msg,
538 const char *destination,
539 dbus_bool_t is_auto_start,
540 struct kdbus_msg **kdbus_msg_reply,
544 dbus_uint64_t flags = 0;
547 flags |= KDBUS_SEND_SYNC_REPLY;
549 ret = _kdbus_send (transport->kdbus,
555 _dbus_verbose ("kdbus error sending message: err %d (%s)\n", ret, _dbus_strerror (ret) );
559 case ENXIO: /* no such id on the bus */
562 dbus_set_error (error,
563 DBUS_ERROR_SERVICE_UNKNOWN,
564 "The name %s was not provided by any .service files",
567 dbus_set_error (error,
568 DBUS_ERROR_NAME_HAS_NO_OWNER,
569 "Name \"%s\" does not exist",
574 dbus_set_error (error,
575 DBUS_ERROR_SERVICE_UNKNOWN,
576 "No support for activation for name: \"%s\"", destination);
580 dbus_set_error (error,
581 DBUS_ERROR_LIMITS_EXCEEDED,
582 "The memory pool of the receiver is full");
586 dbus_set_error (error,
587 DBUS_ERROR_LIMITS_EXCEEDED,
588 "Too many pending messages on the receiver side");
592 dbus_set_error (error,
593 DBUS_ERROR_LIMITS_EXCEEDED,
594 "The size of the message is excessive");
598 dbus_set_error (error,
599 DBUS_ERROR_LIMITS_EXCEEDED,
600 "The maximum number of pending replies per connection has been reached");
604 dbus_set_error (error,
606 "Timeout was reached");
610 dbus_set_error (error,
611 DBUS_ERROR_ACCESS_DENIED,
612 "Permission denied");
616 dbus_set_error (error,
618 "Something went wrong: %s",
619 _dbus_strerror (ret));
629 kdbus_close_message (DBusTransportKdbus *transport, struct kdbus_msg *msg)
631 struct kdbus_item *item;
633 KDBUS_ITEM_FOREACH (item, msg, items)
635 if (item->type == KDBUS_ITEM_PAYLOAD_MEMFD)
636 close (item->memfd.fd);
639 _kdbus_free_mem (transport->kdbus, msg);
642 #ifdef DBUS_ENABLE_VERBOSE_MODE
644 debug_c_str (const char *msg, const char *str, int len)
647 fprintf (stderr, "%s\n", msg);
648 for (i = 0; i < len; i++)
650 fprintf (stderr, "%02x ", (unsigned char)str[i]);
651 if (i%16==15) fprintf (stderr, "\n");
653 fprintf (stderr, "\n");
657 debug_str (const char *msg, const DBusString *str)
659 debug_c_str (msg, _dbus_string_get_const_data (str), _dbus_string_get_length (str));
665 can_send (DBusTransportKdbus *transport,
666 DBusMessage *message)
669 int ret = DBUSPOLICY_RESULT_ALLOW;
670 if (NULL != transport->policy)
672 dbus_uint32_t reply_serial = dbus_message_get_reply_serial (message);
674 /* If reply_serial is non-zero, then it is a reply - just send it.
675 * Otherwise - check the policy.
677 if (0 == reply_serial)
679 /* If method call or unicast signal, check policy */
680 if (dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
681 (dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_SIGNAL &&
682 dbus_message_get_destination (message) != NULL))
683 ret = dbuspolicy1_check_out (transport->policy,
684 dbus_message_get_destination (message),
685 transport->my_DBus_unique_name,
686 dbus_message_get_path (message),
687 dbus_message_get_interface (message),
688 dbus_message_get_member (message),
689 dbus_message_get_type (message),
690 dbus_message_get_error_name (message),
692 !dbus_message_get_no_reply (message));
700 /* function prototypes */
701 static int kdbus_message_size (const struct kdbus_msg *msg,
703 static int kdbus_decode_dbus_message (const struct kdbus_msg *msg,
705 DBusTransportKdbus *kdbus_transport,
710 kdbus_write_msg_internal (DBusTransportKdbus *transport,
711 DBusMessage *message,
712 const char *destination,
713 DBusMessage **sync_reply,
714 dbus_bool_t check_privileges)
716 struct kdbus_msg *msg = NULL;
717 struct kdbus_msg *msg_reply = NULL;
718 struct kdbus_item *item;
719 uint64_t dst_id = KDBUS_DST_ID_BROADCAST;
720 const DBusString *header;
721 const DBusString *body;
722 int64_t ret_size = -1;
723 uint64_t body_size = 0;
724 uint64_t header_size = 0;
728 const char* header_data;
730 const char *destination_name = destination;
732 dbus_uint64_t items_size;
733 dbus_uint64_t flags = 0;
734 dbus_uint64_t timeout_ns_or_cookie_reply = 0;
735 dbus_bool_t check_sync_reply = FALSE;
737 dbus_error_init (&error);
739 if (sync_reply != NULL)
740 check_sync_reply = TRUE;
742 // determine destination and destination id
747 _dbus_string_init_const (&str, destination);
748 if (!_dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str)))
750 _dbus_verbose ("error: unique name is not valid: %s\n", destination);
754 dst_id = parse_name (destination);
758 dst_id = KDBUS_DST_ID_NAME; /* OK, this is zero anyway
759 * but leave it in case
760 * the kdbus constant changes
764 _dbus_message_get_network_data (message, &header, &body);
765 header_size = _dbus_string_get_length (header);
766 body_size = _dbus_string_get_length (body);
767 ret_size = header_size + body_size;
769 /* check whether we can and should use memfd */
770 if ((dst_id != KDBUS_DST_ID_BROADCAST) && (ret_size > MEMFD_SIZE_THRESHOLD))
771 memfd = kdbus_acquire_memfd ();
773 _dbus_message_get_unix_fds (message, &unix_fds, &fds_count);
775 items_size = _kdbus_compute_msg_items_size (transport->kdbus,
782 if (!dbus_message_get_auto_start (message))
783 flags |= KDBUS_MSG_NO_AUTO_START;
785 if (KDBUS_DST_ID_BROADCAST == dst_id) /* signals */
786 flags |= KDBUS_MSG_SIGNAL;
789 if (dbus_message_get_no_reply (message)) /* method replies and errors */
790 timeout_ns_or_cookie_reply = dbus_message_get_reply_serial (message);
791 else /* method calls */
793 long tv_sec, tv_usec;
794 int timeout_ms = _dbus_message_get_timeout_ms(message);
796 _dbus_get_monotonic_time (&tv_sec, &tv_usec);
798 timeout_ns_or_cookie_reply = 1U | ( /* ensure nonzero */
799 (dbus_uint64_t)tv_sec * 1000ULL * 1000ULL * 1000ULL
800 + tv_usec * 1000ULL + (
801 timeout_ms == -1 ? _DBUS_DEFAULT_TIMEOUT_VALUE * 1000000LLU :
802 timeout_ms == DBUS_TIMEOUT_INFINITE ? KDBUS_INFINITE_TIMEOUT_NS :
803 (uint64_t)timeout_ms * 1000000U
807 flags |= KDBUS_MSG_EXPECT_REPLY;
811 msg = _kdbus_new_msg (transport->kdbus,
818 dbus_message_get_serial (message),
819 timeout_ns_or_cookie_reply);
823 /* build message contents */
826 header_data = _dbus_string_get_const_data (header);
828 _dbus_verbose ("sending data by vec\n");
829 item = _kdbus_item_add_payload_vec (item,
831 (uintptr_t)header_data);
834 const char* body_data = _dbus_string_get_const_data (body);
835 size_t body_offsets_size;
836 const char *footer_ptr;
838 /* determine body offsets size */
839 if (ret_size <= 0xFF)
840 body_offsets_size = 1;
841 else if (ret_size <= 0xFFFF)
842 body_offsets_size = 2;
843 else if (ret_size <= 0xFFFFFFFF)
844 body_offsets_size = 4;
846 body_offsets_size = 8;
848 /* check footer size */
849 footer_ptr = body_data + body_size - body_offsets_size -1;
850 while (footer_ptr >= body_data && (*footer_ptr) != 0)
853 if (footer_ptr < body_data)
859 #ifdef DBUS_ENABLE_VERBOSE_MODE
862 debug_str ("Header to send:", header);
863 debug_str ("Body to send:", body);
869 /* prepare memfd for body */
870 if (prepare_mfd (memfd,
872 (footer_ptr - body_data) * sizeof(char)) == -1)
879 item = _kdbus_item_add_payload_memfd (item,
881 (footer_ptr - body_data) * sizeof(char),
885 item = _kdbus_item_add_payload_vec (item,
886 (body_data + body_size - footer_ptr) * sizeof(char),
887 (uintptr_t)footer_ptr);
891 while (body_size > 0)
893 dbus_uint32_t part_size;
895 if (body_size < KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE)
896 part_size = body_size;
898 part_size = KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE;
900 /* we need to adjust part size if footer does not fit as a whole */
901 if (body_size - part_size > 0 && footer_ptr < (body_data + part_size))
902 part_size = footer_ptr - body_data;
904 _dbus_verbose ("attaching body part\n");
905 item = _kdbus_item_add_payload_vec (item,
907 (uintptr_t)body_data);
908 body_data += part_size;
909 body_size -= part_size;
915 item = _kdbus_item_add_fds (item, unix_fds, fds_count);
917 if (NULL != destination)
918 item = _kdbus_item_add_string (item,
921 strlen (destination) + 1);
922 else if (dst_id == KDBUS_DST_ID_BROADCAST)
924 struct kdbus_bloom_filter *filter = NULL;
925 item = _kdbus_item_add_bloom_filter (item,
928 setup_bloom_filter_for_message (message, transport->kdbus, filter);
932 if (check_privileges)
936 check = can_send (transport, message);
938 if (check != DBUSPOLICY_RESULT_ALLOW)
944 case DBUSPOLICY_RESULT_DENY:
945 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
946 "Cannot send message - message rejected due to XML security policies",
950 case DBUSPOLICY_RESULT_DEST_NOT_AVAILABLE:
951 _dbus_assert (destination_name != NULL);
952 if (dbus_message_get_auto_start (message))
953 reply = reply_with_error (DBUS_ERROR_SERVICE_UNKNOWN, NULL,
954 "Cannot send message - destination not known",
957 reply = reply_with_error (DBUS_ERROR_NAME_HAS_NO_OWNER, "Name \"%s\" does not exist",
962 case DBUSPOLICY_RESULT_KDBUS_ERROR:
963 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
964 "Cannot send message - message rejected due to internal libdbuspolicy error (kdbus)",
968 case DBUSPOLICY_RESULT_CYNARA_ERROR:
969 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
970 "Cannot send message - message rejected due to internal libdbuspolicy error (Cynara)",
975 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
976 "Cannot send message - unknown libdbuspolicy error",
987 if (check_sync_reply)
993 /* puts locally generated reply into received messages queue */
994 if (!add_message_to_received (reply, transport->base.connection))
999 } /* ret != DBUSPOLICY_RESULT_ALLOW */
1000 } /* check_privileges */
1003 if (send_message (transport,
1006 dbus_message_get_destination (message),
1007 dbus_message_get_auto_start (message),
1011 DBusMessage *reply = NULL;
1013 if (dbus_error_is_set (&error))
1015 reply = reply_with_error (error.name,
1027 if (check_sync_reply)
1029 *sync_reply = reply;
1033 /* puts locally generated reply into received messages queue */
1034 if (!add_message_to_received (reply, transport->base.connection))
1041 if (check_sync_reply)
1044 int size, ret, *fds;
1048 /* check message size */
1049 size = kdbus_message_size (msg_reply, &n_fds);
1053 kdbus_close_message (transport, msg_reply);
1057 /* alloc buffer for decoded message */
1058 data = dbus_malloc (sizeof (char) * size);
1062 kdbus_close_message (transport, msg_reply);
1066 /* alloc palce for fds */
1067 fds = dbus_malloc (sizeof (int) * (n_fds + 1));
1071 kdbus_close_message (transport, msg_reply);
1076 /* decode dbus message */
1077 ret = kdbus_decode_dbus_message (msg_reply, data,
1078 transport, fds, &n_fds);
1082 kdbus_close_message (transport, msg_reply);
1087 _dbus_string_init_const_len (&str, data, ret);
1089 /* create DBusMessage from kmsg */
1090 *sync_reply = _dbus_decode_kmsg (&str, msg_reply->src_id, fds, n_fds);
1091 if (*sync_reply == NULL)
1094 kdbus_close_message (transport, msg_reply);
1101 _kdbus_free_msg (msg);
1109 * Sends DBus message using kdbus.
1110 * Handles broadcasts and unicast messages, and passing of Unix fds.
1111 * Also can locally generate error replies on some error returned by kernel.
1113 * TODO refactor to be more compact - maybe we can send header always as a payload vector
1114 * and only message body as memfd if needed.
1116 * @param transport Transport.
1117 * @param message DBus message to be sent
1118 * @param destination Destination of the message.
1119 * @returns bytes sent or -1 if sending failed
1122 kdbus_write_msg (DBusTransportKdbus *transport,
1123 DBusMessage *message,
1124 const char *destination)
1126 return kdbus_write_msg_internal (transport, message, destination, NULL, TRUE);
1129 static dbus_uint64_t
1130 get_pool_size (void)
1132 dbus_uint64_t receive_pool_size = RECEIVE_POOL_SIZE_DEFAULT_SIZE;
1133 const char *env_pool;
1135 env_pool = _dbus_getenv (RECEIVE_POOL_SIZE_ENV_VAR_NAME);
1138 dbus_uint64_t size = 0;
1139 unsigned int multiply = 1;
1142 page_size = sysconf (_SC_PAGESIZE);
1143 if (page_size == -1)
1149 size = strtoul (env_pool, (char**)&env_pool, 10);
1150 if ((errno == EINVAL) || size == 0)
1156 if (*env_pool == 'k')
1161 else if (*env_pool == 'M')
1163 multiply = 1024 * 1024;
1167 if (*env_pool != '\0')
1173 receive_pool_size = size * multiply;
1175 if ((receive_pool_size > RECEIVE_POOL_SIZE_MAX_MBYTES * 1024 * 1024) ||
1176 (receive_pool_size < RECEIVE_POOL_SIZE_MIN_KBYTES * 1024) ||
1177 ((receive_pool_size & (page_size - 1)) != 0)) //pool size must be aligned to page size
1183 _dbus_warn ("%s value is invalid, default value %luB will be used.\n", RECEIVE_POOL_SIZE_ENV_VAR_NAME,
1184 RECEIVE_POOL_SIZE_DEFAULT_SIZE);
1185 _dbus_warn ("Correct value must be between %ukB and %uMB and must be aligned to page size: %ldB.\n",
1186 RECEIVE_POOL_SIZE_MIN_KBYTES, RECEIVE_POOL_SIZE_MAX_MBYTES, page_size);
1188 receive_pool_size = RECEIVE_POOL_SIZE_DEFAULT_SIZE;
1192 _dbus_verbose ("Receive pool size set to %llu.\n", (unsigned long long)receive_pool_size);
1193 return receive_pool_size;
1196 static dbus_uint64_t
1197 get_attach_flags_recv (DBusTransportKdbus *transport)
1199 dbus_uint64_t attach_flags_recv = 0;
1201 #ifdef LIBDBUSPOLICY
1202 attach_flags_recv = KDBUS_ATTACH_CREDS | KDBUS_ATTACH_NAMES | KDBUS_ATTACH_SECLABEL;
1205 return attach_flags_recv;
1209 * Performs kdbus hello - registration on the kdbus bus
1210 * needed to send and receive messages on the bus,
1211 * and configures transport.
1212 * As a result unique id on he bus is obtained.
1214 * @see KDBUS_HELLO_* flags in <linux/kdbus.h>
1216 * @param transport transport structure
1217 * @param registration_flags aditional flags to modify registration process
1218 * @returns #TRUE on success
1221 bus_register_kdbus (DBusTransportKdbus *transport,
1222 dbus_uint32_t registration_flags,
1226 dbus_uint64_t flags;
1228 #ifdef LIBDBUSPOLICY
1229 void *policy = dbuspolicy1_init (_kdbus_get_path(transport->kdbus));
1232 dbus_set_error (error,
1233 DBUS_ERROR_NO_REPLY,
1234 "Did not receive a reply. Possible causes include: couldn't load dbus policy for kdbus transport or the message bus security policy blocked the reply.");
1238 transport->policy = policy;
1241 flags = KDBUS_HELLO_ACCEPT_FD;
1242 if (registration_flags & REGISTER_FLAG_MONITOR)
1243 flags |= KDBUS_HELLO_MONITOR;
1245 ret = _kdbus_hello (transport->kdbus,
1248 get_attach_flags_recv (transport),
1250 transport->activator,
1254 dbus_set_error (error, DBUS_ERROR_FAILED, "Hello failed: %d", -ret);
1255 #ifdef LIBDBUSPOLICY
1256 dbuspolicy1_free (policy);
1261 transport->my_DBus_unique_name = create_unique_name_from_unique_id (_kdbus_get_id (transport->kdbus));
1262 if (NULL == transport->my_DBus_unique_name)
1264 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, "Hello post failed: %d", -ret);
1265 #ifdef LIBDBUSPOLICY
1266 dbuspolicy1_free (policy);
1271 _dbus_verbose ("-- Our peer ID is: %llu\n", (unsigned long long)_kdbus_get_id (transport->kdbus));
1277 can_own (DBusTransportKdbus *transport,
1280 dbus_bool_t result = TRUE;
1282 #ifdef LIBDBUSPOLICY
1283 if (NULL != transport->policy)
1284 result = (dbuspolicy1_can_own (transport->policy, name) == 1);
1291 request_DBus_name (DBusTransportKdbus *transport,
1296 DBusString service_name_real;
1297 const DBusString *service_name = &service_name_real;
1299 dbus_uint32_t flags;
1301 if (!dbus_message_get_args (msg, error,
1302 DBUS_TYPE_STRING, &name,
1303 DBUS_TYPE_UINT32, &flags,
1307 _dbus_string_init_const (&service_name_real, name);
1309 if (!_dbus_validate_bus_name (service_name, 0,
1310 _dbus_string_get_length (service_name)))
1312 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1313 "Requested bus name \"%s\" is not valid", name);
1315 _dbus_verbose ("Attempt to acquire invalid service name\n");
1320 if (_dbus_string_get_byte (service_name, 0) == ':')
1322 /* Not allowed; only base services can start with ':' */
1323 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1324 "Cannot acquire a service starting with ':' such as \"%s\"", name);
1326 _dbus_verbose ("Attempt to acquire invalid base service name \"%s\"", name);
1331 if (_dbus_string_equal_c_str (service_name, DBUS_SERVICE_DBUS))
1333 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1334 "Connection is not allowed to own the service \"%s\"because "
1335 "it is reserved for D-Bus' use only", DBUS_SERVICE_DBUS);
1339 if (!can_own (transport, name))
1341 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1342 "Connection \"%s\" is not allowed to own the "
1343 "service \"%s\" due to security policies",
1344 transport->my_DBus_unique_name,
1349 *result = _kdbus_request_name (transport->kdbus, name, flags);
1350 if (*result == -EPERM)
1352 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1353 "Kdbus doesn't allow %s to own the service \"%s\"",
1354 transport->my_DBus_unique_name, _dbus_string_get_const_data (service_name));
1357 else if (*result < 0)
1359 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired, %d, %m", name, errno);
1367 release_DBus_name (DBusTransportKdbus *transport,
1373 DBusString service_name;
1375 if (!dbus_message_get_args (msg, error,
1376 DBUS_TYPE_STRING, &name,
1380 _dbus_string_init_const (&service_name, name);
1382 if (!_dbus_validate_bus_name (&service_name, 0,
1383 _dbus_string_get_length (&service_name)))
1385 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1386 "Given bus name \"%s\" is not valid",
1387 _dbus_string_get_const_data (&service_name));
1389 _dbus_verbose ("Attempt to release invalid service name\n");
1393 if (_dbus_string_get_byte (&service_name, 0) == ':')
1395 /* Not allowed; the base service name cannot be created or released */
1396 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1397 "Cannot release a service starting with ':' such as \"%s\"",
1398 _dbus_string_get_const_data (&service_name));
1400 _dbus_verbose ("Attempt to release invalid base service name \"%s\"",
1401 _dbus_string_get_const_data (&service_name));
1405 if (_dbus_string_equal_c_str (&service_name, DBUS_SERVICE_DBUS))
1407 /* Not allowed; the base service name cannot be created or released */
1408 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1409 "Cannot release the %s service because it is owned by the bus",
1412 _dbus_verbose ("Attempt to release service name \"%s\"",
1417 *result = _kdbus_release_name (transport->kdbus, name);
1420 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be released, %d, %m", name, errno);
1428 strcmp_existing (const char *str1, const char *str2)
1430 if (NULL == str1 || NULL == str2)
1432 return strcmp (str1, str2);
1436 is_bloom_needed (MatchRule *rule)
1441 if (_match_rule_get_message_type (rule) != DBUS_TYPE_INVALID
1442 || _match_rule_get_interface (rule) != NULL
1443 || _match_rule_get_member (rule) != NULL
1444 || _match_rule_get_path (rule) != NULL
1445 || _match_rule_get_path_namespace (rule) != NULL)
1448 rule_int = _match_rule_get_args_len (rule);
1449 for (i = 0; i < rule_int; i++)
1451 if (_match_rule_get_args (rule, i) != NULL)
1459 get_bloom (kdbus_t *kdbus, MatchRule *rule, kdbus_bloom_data_t *bloom_data)
1462 const char *rule_string;
1464 char argument_buf[sizeof ("arg")-1 + 2 + sizeof ("-slash-prefix") +1];
1466 rule_int = _match_rule_get_message_type (rule);
1467 if (rule_int != DBUS_MESSAGE_TYPE_INVALID)
1469 bloom_add_pair (bloom_data, kdbus, "message-type", dbus_message_type_to_string (rule_int));
1470 _dbus_verbose ("Adding type %s \n", dbus_message_type_to_string (rule_int));
1473 rule_string = _match_rule_get_interface (rule);
1474 if (rule_string != NULL)
1476 bloom_add_pair (bloom_data, kdbus, "interface", rule_string);
1477 _dbus_verbose ("Adding interface %s \n", rule_string);
1480 rule_string = _match_rule_get_member (rule);
1481 if (rule_string != NULL)
1483 bloom_add_pair (bloom_data, kdbus, "member", rule_string);
1484 _dbus_verbose ("Adding member %s \n", rule_string);
1487 rule_string = _match_rule_get_path (rule);
1488 if (rule_string != NULL)
1490 bloom_add_pair (bloom_data, kdbus, "path", rule_string);
1491 _dbus_verbose ("Adding path %s \n", rule_string);
1494 rule_string = _match_rule_get_path_namespace (rule);
1495 if (rule_string != NULL)
1497 bloom_add_pair (bloom_data, kdbus, "path-slash-prefix", rule_string);
1498 _dbus_verbose ("Adding path-slash-prefix %s \n", rule_string);
1501 rule_int = _match_rule_get_args_len (rule);
1502 for (i = 0; i < rule_int; i++)
1504 rule_string = _match_rule_get_args (rule, i);
1505 if (rule_string != NULL)
1507 unsigned int rule_arg_lens = _match_rule_get_arg_lens (rule, i);
1508 if (rule_arg_lens & MATCH_ARG_IS_PATH)
1510 snprintf (argument_buf, sizeof (argument_buf), "arg%d-slash-prefix", i);
1511 bloom_add_prefixes (bloom_data, kdbus, argument_buf, rule_string, '/');
1513 else if (rule_arg_lens & MATCH_ARG_NAMESPACE)
1515 snprintf (argument_buf, sizeof (argument_buf), "arg%d-dot-prefix", i);
1516 bloom_add_prefixes (bloom_data, kdbus, argument_buf, rule_string, '.');
1520 snprintf (argument_buf, sizeof (argument_buf), "arg%d", i);
1521 bloom_add_pair (bloom_data, kdbus, argument_buf, rule_string);
1528 * Adds a match rule to match broadcast messages going through the message bus.
1529 * Do no affect messages addressed directly.
1531 * TODO add error reporting
1533 * @param transport transport
1537 add_match_kdbus (DBusTransportKdbus *transport,
1540 struct kdbus_cmd_match *cmd;
1541 struct kdbus_item *item;
1543 uint64_t src_id = KDBUS_MATCH_ID_ANY;
1545 dbus_bool_t need_bloom = FALSE;
1547 const char *rule_sender;
1548 const char *rule_arg0 = NULL;
1551 rule_cookie = match_rule_get_cookie (rule);
1552 rule_sender = _match_rule_get_sender (rule);
1555 * First check if it is org.freedesktop.DBus's NameOwnerChanged or any
1556 * org.freedesktop.DBus combination that includes this,
1557 * because it must be converted to special kdbus rule (kdbus has separate rules
1558 * for kdbus (kernel) generated broadcasts).
1560 if (!strcmp_existing (rule_sender, DBUS_SERVICE_DBUS))
1562 int message_type = _match_rule_get_message_type (rule);
1564 if ((DBUS_MESSAGE_TYPE_INVALID == message_type || DBUS_MESSAGE_TYPE_SIGNAL == message_type)
1565 && !strcmp_existing (_match_rule_get_interface (rule), DBUS_INTERFACE_DBUS)
1566 && !strcmp_existing (_match_rule_get_path (rule), DBUS_PATH_DBUS))
1568 if (_match_rule_get_args_len(rule) == 1)
1570 rule_arg0 = _match_rule_get_args(rule, 0);
1574 _dbus_string_init_const (&str, rule_arg0);
1575 ret = _dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str));
1580 if (!strcmp_existing (_match_rule_get_member (rule), "NameOwnerChanged"))
1582 ret = _kdbus_add_match_name_change (transport->kdbus,
1592 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1593 ret, _dbus_strerror (ret));
1597 _dbus_verbose ("Added match rule for kernel correctly.\n");
1599 ret = _kdbus_add_match_id_change (transport->kdbus,
1607 _dbus_verbose ("Failed adding match rule for adding id for daemon, error: %d, %s\n",
1608 ret, _dbus_strerror (ret));
1612 else if (strcmp (_match_rule_get_member (rule), "NameAcquired") == 0)
1614 ret = _kdbus_add_match_name_acquired (transport->kdbus,
1619 _kdbus_get_id (transport->kdbus),
1624 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1625 ret, _dbus_strerror (ret));
1629 else if (strcmp (_match_rule_get_member (rule), "NameLost") == 0)
1631 ret = _kdbus_add_match_name_lost (transport->kdbus,
1634 _kdbus_get_id (transport->kdbus),
1641 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1642 ret, _dbus_strerror (ret));
1647 /* Sender=DBUS_SERVICE_DBUS matches (as opposed to wildcard sender) need no standard rule. */
1653 * standard rule - registered in general way, for non-kernel broadcasts
1654 * kdbus doesn't use it to check kdbus (kernel) generated broadcasts
1657 need_bloom = is_bloom_needed (rule);
1659 if (rule_sender != NULL)
1662 _dbus_string_init_const (&str, rule_sender);
1664 if (!_dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str)))
1667 src_id = parse_name (rule_sender);
1669 /* well-known name */
1670 src_id = KDBUS_MATCH_ID_ANY;
1676 items_size = _kdbus_compute_match_items_size (transport->kdbus,
1681 cmd = _kdbus_new_cmd_match (transport->kdbus,
1690 if (NULL != rule_sender) /* well-known name */
1692 item = _kdbus_item_add_string (item,
1695 strlen (rule_sender) + 1);
1696 _dbus_verbose ("Adding sender %s \n", rule_sender);
1698 else if (KDBUS_MATCH_ID_ANY != src_id) /* unique id */
1700 item = _kdbus_item_add_id (item, src_id);
1701 _dbus_verbose ("Adding src_id %llu \n", (unsigned long long)src_id);
1707 item = _kdbus_item_add_bloom_mask (item, transport->kdbus, &bloom);
1708 get_bloom (transport->kdbus, rule, bloom);
1711 ret = _kdbus_add_match (transport->kdbus, cmd);
1713 _kdbus_free_cmd_match (cmd);
1718 _dbus_verbose ("Failed adding match bus rule cookie %llu,\nerror: %d, %s\n",
1719 rule_cookie, ret, _dbus_strerror (ret));
1723 _dbus_verbose ("Added match bus rule %llu\n", rule_cookie);
1727 static DBusMessage *
1728 capture_org_freedesktop_DBus_Hello (DBusTransportKdbus *transport,
1729 DBusMessage *message,
1732 DBusMessageIter args;
1733 dbus_uint32_t registration_flags = 0;
1735 dbus_message_iter_init (message, &args);
1736 if (dbus_message_iter_get_arg_type (&args) == DBUS_TYPE_UINT32)
1737 dbus_message_iter_get_basic (&args, ®istration_flags);
1739 if (!bus_register_kdbus (transport, registration_flags, error))
1742 return reply_1_data (message, DBUS_TYPE_STRING, &transport->my_DBus_unique_name);
1745 free (transport->my_DBus_unique_name);
1749 static DBusMessage *
1750 capture_org_freedesktop_DBus_RequestName (DBusTransportKdbus *transport,
1751 DBusMessage *message,
1756 if (!request_DBus_name (transport, message, &result, error))
1759 return reply_1_data (message, DBUS_TYPE_UINT32, &result);
1762 static DBusMessage *
1763 capture_org_freedesktop_DBus_ReleaseName (DBusTransportKdbus *transport,
1764 DBusMessage *message,
1769 if (!release_DBus_name (transport, message, &result, error))
1772 return reply_1_data (message, DBUS_TYPE_UINT32, &result);
1775 static DBusMessage *
1776 capture_org_freedesktop_DBus_AddMatch (DBusTransportKdbus *transport,
1777 DBusMessage *message,
1782 MatchRule *rule = NULL;
1783 DBusConnection *connection = transport->base.connection;
1785 if (!dbus_message_get_args (message, error,
1786 DBUS_TYPE_STRING, &arg,
1790 _dbus_string_init_const (&arg_str, arg);
1792 rule = match_rule_parse (connection, &arg_str, error);
1796 if (!matchmaker_add_rule (transport->matchmaker, rule))
1798 dbus_set_error_const (error, DBUS_ERROR_NO_MEMORY, "No memory to store match rule");
1802 if (!add_match_kdbus (transport, rule))
1804 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match rule, %s",
1805 _dbus_strerror_from_errno ());
1809 match_rule_unref (rule);
1810 return dbus_message_new_method_return (message);
1814 match_rule_unref (rule);
1815 _dbus_verbose ("Error during AddMatch in lib: %s, %s\n", error->name, error->message);
1819 static dbus_uint64_t
1820 get_match_cookie_for_remove (Matchmaker *matchmaker, MatchRule *rule_to_remove)
1822 DBusList *rules = matchmaker_get_rules_list (matchmaker, rule_to_remove);
1825 DBusList *link = _dbus_list_get_last_link (&rules);
1826 while (NULL != link)
1828 if (match_rule_equal_lib (link->data, rule_to_remove))
1830 return match_rule_get_cookie (link->data);
1832 link = _dbus_list_get_prev_link (&rules, link);
1838 static DBusMessage *
1839 capture_org_freedesktop_DBus_RemoveMatch (DBusTransportKdbus *transport,
1840 DBusMessage *message,
1845 MatchRule *rule = NULL;
1846 DBusConnection *connection = transport->base.connection;
1847 dbus_uint64_t cookie;
1849 if (!dbus_message_get_args (message, error,
1850 DBUS_TYPE_STRING, &arg,
1854 _dbus_string_init_const (&arg_str, arg);
1856 rule = match_rule_parse (connection, &arg_str, error);
1859 cookie = get_match_cookie_for_remove (transport->matchmaker, rule);
1862 dbus_set_error (error,
1863 DBUS_ERROR_MATCH_RULE_NOT_FOUND,
1864 "The given match rule wasn't found and can't be removed");
1868 int ret = _kdbus_remove_match (transport->kdbus, cookie);
1870 dbus_set_error (error,
1871 _dbus_error_from_errno (ret),
1872 "Could not remove match rule");
1874 if (!dbus_error_is_set (error))
1875 matchmaker_remove_rule_by_value (transport->matchmaker, rule, error);
1878 match_rule_unref (rule);
1881 if (dbus_error_is_set (error))
1883 _dbus_verbose ("Error during RemoveMatch in lib: %s, %s\n",
1889 return dbus_message_new_method_return (message);
1893 get_connection_info_by_name (DBusMessage *message,
1895 struct nameInfo *info,
1896 DBusTransportKdbus *transport,
1898 dbus_bool_t getLabel)
1901 if (!dbus_validate_bus_name (name, error))
1904 if ((ret = _kdbus_connection_info_by_name (transport->kdbus, name, getLabel, info)) != 0)
1906 if (ESRCH == ret || ENXIO == ret)
1907 dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
1908 "Could not get owner of name '%s': no such name", name);
1910 dbus_set_error (error, DBUS_ERROR_FAILED,
1911 "Unable to query name %s, returned %d, errno = %d (%m).",
1915 if (info->flags & KDBUS_HELLO_ACTIVATOR)
1917 dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
1918 "Could not get owner of name '%s'", name);
1919 /* we return ESRCH - this is an indicator that name has an activator */
1925 /* This local function handles common case for org.freedesktop.DBus method handlers:
1926 * 1. gets string argument from incoming message;
1927 * 2. gets connection info for such name.
1928 * Note: if getLabel argument is set to TRUE, the caller must free info.sec_label.
1931 get_connection_info_from_message_argument (DBusMessage *message,
1933 struct nameInfo *info,
1934 DBusTransportKdbus *transport,
1935 dbus_bool_t getLabel)
1939 if (!dbus_message_get_args (message, error,
1940 DBUS_TYPE_STRING, &arg,
1944 return get_connection_info_by_name (message, error, info, transport, arg, getLabel);
1947 static DBusMessage *
1948 capture_org_freedesktop_DBus_GetConnectionCredentials (DBusTransportKdbus *transport,
1949 DBusMessage *message,
1952 DBusMessage *reply = NULL;
1953 DBusMessageIter reply_iter;
1954 DBusMessageIter array_iter;
1955 struct nameInfo info;
1957 if (get_connection_info_from_message_argument (message, error, &info, transport, TRUE) != 0)
1960 reply = _dbus_asv_new_method_return (message, &reply_iter, &array_iter);
1964 /* we can't represent > 32-bit pids; if your system needs them, please
1965 * add ProcessID64 to the spec or something */
1966 if (info.processId <= _DBUS_UINT32_MAX)
1968 if (!_dbus_asv_add_uint32 (&array_iter, "ProcessID", info.processId))
1971 /* we can't represent > 32-bit uids; if your system needs them, please
1972 * add UnixUserID64 to the spec or something */
1973 if (info.userId <= _DBUS_UINT32_MAX)
1975 if (!_dbus_asv_add_uint32 (&array_iter, "UnixUserID", info.userId))
1979 if (info.sec_label != NULL)
1981 dbus_bool_t res = _dbus_asv_add_byte_array (&array_iter,
1982 "LinuxSecurityLabel",
1984 info.sec_label_len);
1986 dbus_free (info.sec_label);
1992 if (!_dbus_asv_close (&reply_iter, &array_iter))
1995 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
2001 _dbus_asv_abandon (&reply_iter, &array_iter);
2002 dbus_message_unref (reply);
2008 _mac_smack_use (void)
2010 static int cached_use = -1;
2013 cached_use = access("/sys/fs/smackfs/", F_OK) >= 0;
2018 static DBusMessage *
2019 capture_org_freedesktop_DBus_GetConnectionSELinuxSecurityContext (DBusTransportKdbus *transport,
2020 DBusMessage *message,
2023 struct nameInfo info;
2025 if (get_connection_info_from_message_argument (message, error, &info, transport, TRUE) != 0)
2028 if (info.sec_label != NULL)
2030 if (_mac_smack_use())
2032 dbus_set_error (error, DBUS_ERROR_SELINUX_SECURITY_CONTEXT_UNKNOWN,
2033 "Could not determine security context");
2034 dbus_free (info.sec_label);
2040 reply = reply_fixed_array (message, DBUS_TYPE_BYTE,
2042 info.sec_label_len);
2044 dbus_free (info.sec_label);
2050 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, "Operation not supported");
2056 static DBusMessage *
2057 capture_org_freedesktop_DBus_GetConnectionUnixProcessID (DBusTransportKdbus *transport,
2058 DBusMessage *message,
2061 struct nameInfo info;
2062 dbus_uint32_t processId;
2064 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0 ||
2065 info.processId > _DBUS_UINT32_MAX)
2068 processId = info.processId;
2070 return reply_1_data (message, DBUS_TYPE_UINT32, &processId);
2073 static DBusMessage *
2074 capture_org_freedesktop_DBus_GetConnectionUnixUser (DBusTransportKdbus *transport,
2075 DBusMessage *message,
2078 struct nameInfo info;
2079 dbus_uint32_t userId;
2081 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0 ||
2082 info.userId > _DBUS_UINT32_MAX)
2085 userId = info.userId;
2087 return reply_1_data (message, DBUS_TYPE_UINT32, &userId);
2090 static DBusMessage *
2091 capture_org_freedesktop_DBus_GetId (DBusTransportKdbus *transport,
2092 DBusMessage *message,
2095 dbus_uint64_t bus_id_size = _kdbus_get_bus_id_size ();
2096 char bus_id[bus_id_size*2+1];
2097 char *bus_id_ptr = bus_id;
2098 char *bus_id_original = _kdbus_get_bus_id (transport->kdbus);
2099 dbus_uint64_t i = 0;
2100 for (; i < bus_id_size; i++)
2101 snprintf (bus_id + 2*i, sizeof (bus_id) - 2*i, "%02x", bus_id_original[i]);
2102 return reply_1_data (message, DBUS_TYPE_STRING, &bus_id_ptr);
2105 static DBusMessage *
2106 capture_org_freedesktop_DBus_GetNameOwner (DBusTransportKdbus *transport,
2107 DBusMessage *message,
2111 struct nameInfo info;
2115 if (!dbus_message_get_args (message, error,
2116 DBUS_TYPE_STRING, &arg,
2120 if (strcmp (arg, DBUS_SERVICE_DBUS) == 0)
2122 if (-1 == asprintf (&unique_name, "%s", DBUS_SERVICE_DBUS))
2127 if (get_connection_info_by_name (message, error, &info, transport, arg, FALSE) != 0)
2130 unique_name = create_unique_name_from_unique_id (info.uniqueId);
2131 if (NULL == unique_name)
2135 reply = reply_1_data (message, DBUS_TYPE_STRING, &unique_name);
2142 static DBusMessage *
2143 reply_listNames (DBusTransportKdbus *transport,
2144 DBusMessage *message,
2146 dbus_uint64_t flags)
2148 DBusMessage *reply = NULL;
2149 dbus_uint64_t prev_id = 0;
2151 /* First, get the list from kdbus */
2153 struct kdbus_info *name_list, *name;
2156 DBusMessageIter iter;
2157 DBusMessageIter array_iter;
2159 ret = _kdbus_list (transport->kdbus,
2165 dbus_set_error (error, DBUS_ERROR_FAILED, "Error listing names");
2169 /* Compose the reply on the fly */
2170 reply = dbus_message_new_method_return (message);
2174 dbus_message_iter_init_append (reply, &iter);
2175 if (!dbus_message_iter_open_container (&iter,
2177 DBUS_TYPE_STRING_AS_STRING,
2181 KDBUS_FOREACH (name, name_list, list_size)
2183 struct kdbus_item *item;
2185 if ((flags & KDBUS_LIST_UNIQUE) && name->id != prev_id)
2189 char *unique_name = create_unique_name_from_unique_id (name->id);
2191 if (NULL == unique_name)
2194 res = dbus_message_iter_append_basic (&array_iter,
2203 KDBUS_ITEM_FOREACH (item, name, items)
2205 if (item->type == KDBUS_ITEM_OWNED_NAME)
2207 DBusError local_error;
2208 char *name_ptr = item->name.name;
2210 dbus_error_init ( &local_error );
2211 if (!dbus_validate_bus_name (name_ptr, &local_error))
2214 if (flags & KDBUS_LIST_QUEUED)
2215 name_ptr = create_unique_name_from_unique_id (name->id);
2217 if (NULL == name_ptr)
2220 if (!dbus_message_iter_append_basic (&array_iter,
2224 if (flags & KDBUS_LIST_QUEUED)
2229 if (flags & KDBUS_LIST_QUEUED)
2235 if (!dbus_message_iter_close_container (&iter, &array_iter))
2238 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
2241 _kdbus_free_mem (transport->kdbus, name_list);
2246 dbus_message_iter_abandon_container (&iter, &array_iter);
2249 dbus_message_unref (reply);
2251 _kdbus_free_mem (transport->kdbus, name_list);
2255 static DBusMessage *
2256 capture_org_freedesktop_DBus_ListActivatableNames (DBusTransportKdbus *transport,
2257 DBusMessage *message,
2260 return reply_listNames (transport, message, error, KDBUS_LIST_ACTIVATORS);
2263 static DBusMessage *
2264 capture_org_freedesktop_DBus_ListNames (DBusTransportKdbus *transport,
2265 DBusMessage *message,
2268 return reply_listNames (transport, message, error, KDBUS_LIST_UNIQUE | KDBUS_LIST_NAMES);
2271 static DBusMessage *
2272 capture_org_freedesktop_DBus_ListQueuedOwners (DBusTransportKdbus *transport,
2273 DBusMessage *message,
2276 struct nameInfo info;
2278 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0)
2281 return reply_listNames (transport, message, error, KDBUS_LIST_QUEUED);
2284 static DBusMessage *
2285 capture_org_freedesktop_DBus_NameHasOwner (DBusTransportKdbus *transport,
2286 DBusMessage *message,
2289 struct nameInfo info;
2290 dbus_bool_t result = TRUE;
2292 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0)
2294 if (dbus_error_is_set (error) && dbus_error_has_name (error, DBUS_ERROR_NAME_HAS_NO_OWNER))
2297 dbus_error_free (error);
2303 return reply_1_data (message, DBUS_TYPE_BOOLEAN, &result);
2306 static DBusMessage *
2307 capture_org_freedesktop_DBus_ReloadConfig (DBusTransportKdbus *transport,
2308 DBusMessage *message,
2311 DBusMessageIter iter;
2312 DBusMessage *reply = NULL;
2314 dbus_message_iter_init (message, &iter);
2315 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_STRUCT)
2317 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
2318 "Call to 'ReloadConfig' has wrong args");
2322 reply = dbus_message_new_method_return (message);
2326 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
2332 dbus_message_unref (reply);
2336 static DBusMessage *
2337 capture_org_freedesktop_DBus_StartServiceByName (DBusTransportKdbus *transport,
2338 DBusMessage *message,
2341 struct nameInfo info;
2343 dbus_uint32_t flags; /* Spec says: not used, but we check the syntax anyway */
2345 dbus_bool_t dbus_service = FALSE;
2347 if (!dbus_message_get_args (message, error,
2348 DBUS_TYPE_STRING, &name,
2349 DBUS_TYPE_UINT32, &flags,
2353 dbus_service = (strncmp (name, DBUS_SERVICE_DBUS, strlen (DBUS_SERVICE_DBUS) + 1) == 0);
2356 ret = get_connection_info_by_name (message,
2363 if (dbus_service || 0 == ret)
2365 dbus_uint32_t status = DBUS_START_REPLY_ALREADY_RUNNING;
2366 return reply_1_data (message, DBUS_TYPE_UINT32, &status);
2368 else if (-ESRCH == ret) /* there is an activator */
2370 DBusMessage *sub_message;
2372 /* if we are here, then we have error set - free place for possible real error */
2373 dbus_error_free (error);
2375 /* send method call to org.freedesktop.DBus.Peer.Ping */
2376 sub_message = dbus_message_new_method_call (name, "/", DBUS_INTERFACE_PEER, "Ping");
2377 if (sub_message == NULL)
2380 /* The serial number here is set to -1. A message needs a valid serial number.
2381 * We do not have access to connection's serial numbers counter, so we need to make up one.
2382 * -1 is the last valid serial, so we hope that we'll never get there, especially with 64-bit
2385 dbus_message_set_serial (sub_message, -1);
2387 dbus_message_lock (sub_message);
2389 ret = kdbus_write_msg_internal (transport, sub_message, name, NULL, FALSE);
2391 dbus_message_unref (sub_message);
2397 dbus_uint32_t status = DBUS_START_REPLY_SUCCESS;
2398 return reply_1_data (message, DBUS_TYPE_UINT32, &status);
2404 * There was an error set in get_connection_info_by_name()
2405 * We want to have another error return from StartServiceByName.
2407 dbus_error_free (error);
2408 dbus_set_error (error,
2409 DBUS_ERROR_SERVICE_UNKNOWN,
2410 "The name %s was not provided by any .service files",
2417 static DBusMessage *
2418 capture_org_freedesktop_DBus_UpdateActivationEnvironment (DBusTransportKdbus *transport,
2419 DBusMessage *message,
2422 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
2423 "'%s' method not supported", dbus_message_get_member (message));
2427 typedef DBusMessage * (*CaptureHandler)(DBusTransportKdbus *, DBusMessage *, DBusError *);
2428 struct CaptureHandlers {
2429 const char *method_name;
2430 CaptureHandler handler;
2433 #define HANDLER_ELEMENT(x) {#x, capture_org_freedesktop_DBus_##x}
2435 /* This is to cut the code to parts, and keep it organized:
2436 * an array of elements of type, as in example:
2437 * { "RequestName", capture_org_freedesktop_DBus_RequestName }
2438 * That is, a method of name RequestName will be handled by capture_org_freedesktop_DBus_RequestName ().
2440 static struct CaptureHandlers capture_handlers[] =
2442 // "Hello" is handled separately
2443 // HANDLER_ELEMENT (Hello),
2444 HANDLER_ELEMENT (RequestName),
2445 HANDLER_ELEMENT (ReleaseName),
2446 HANDLER_ELEMENT (AddMatch),
2447 HANDLER_ELEMENT (RemoveMatch),
2448 HANDLER_ELEMENT (GetConnectionCredentials),
2449 HANDLER_ELEMENT (GetConnectionSELinuxSecurityContext),
2450 HANDLER_ELEMENT (GetConnectionUnixProcessID),
2451 HANDLER_ELEMENT (GetConnectionUnixUser),
2452 HANDLER_ELEMENT (GetId),
2453 HANDLER_ELEMENT (GetNameOwner),
2454 HANDLER_ELEMENT (ListActivatableNames),
2455 HANDLER_ELEMENT (ListNames),
2456 HANDLER_ELEMENT (ListQueuedOwners),
2457 HANDLER_ELEMENT (NameHasOwner),
2458 HANDLER_ELEMENT (ReloadConfig),
2459 HANDLER_ELEMENT (StartServiceByName),
2460 HANDLER_ELEMENT (UpdateActivationEnvironment)
2464 * Looks over messages sent to org.freedesktop.DBus. Hello message, which performs
2465 * registration on the bus, is captured as it must be locally converted into
2466 * appropriate ioctl. AddMatch and RemoveMatch are captured to store match rules
2467 * locally in case of false positive result of kdbus bloom filters, but after
2468 * being read they are passed to org.freedesktop.DBus to register these rules
2470 * All the rest org.freedesktop.DBus methods are left untouched
2471 * and they are sent to dbus-daemon in the same way as every other messages.
2473 * @param transport Transport
2474 * @param message Message being sent.
2476 1 if message is not captured and should be passed to kdbus
2477 * 0 if message was handled locally and correctly (it includes proper return of error reply),
2478 * -1 message to org.freedesktop.DBus was not handled correctly.
2481 capture_org_freedesktop_DBus (DBusTransportKdbus *transport,
2482 const char *destination,
2483 DBusMessage *message,
2484 DBusMessage **reply)
2487 if (!strcmp (destination, DBUS_SERVICE_DBUS))
2489 const char *interface = dbus_message_get_interface (message);
2490 if (interface && !strcmp (interface, DBUS_INTERFACE_DBUS))
2493 const char *member = dbus_message_get_member (message);
2495 dbus_error_init (&error);
2497 if (!strcmp (member, "Hello"))
2499 *reply = capture_org_freedesktop_DBus_Hello (transport, message, &error);
2504 int handlers_size = sizeof (capture_handlers)/sizeof (capture_handlers[0]);
2506 while (i < handlers_size && strcmp (member, capture_handlers[i].method_name) != 0)
2509 if (i < handlers_size)
2511 *reply = capture_handlers[i].handler (transport, message, &error);
2515 dbus_set_error (&error, DBUS_ERROR_UNKNOWN_METHOD,
2516 "org.freedesktop.DBus does not understand message %s", member);
2520 if (*reply == NULL && dbus_error_is_set (&error))
2522 *reply = reply_with_error ((char*)error.name,
2526 dbus_error_free (&error);
2534 } /* id DBUS_INTERFACE_DBUS */
2535 } /* if DBUS_SERVICE_DBUS */
2540 #ifdef DBUS_ENABLE_VERBOSE_MODE
2541 #define ENUM_NAME_ITEM(x) case x : return #x
2544 enum_MSG (long long id)
2548 ENUM_NAME_ITEM (_KDBUS_ITEM_NULL);
2549 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_VEC);
2550 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_OFF);
2551 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_MEMFD);
2552 ENUM_NAME_ITEM (KDBUS_ITEM_FDS);
2553 ENUM_NAME_ITEM (KDBUS_ITEM_BLOOM_PARAMETER);
2554 ENUM_NAME_ITEM (KDBUS_ITEM_BLOOM_FILTER);
2555 ENUM_NAME_ITEM (KDBUS_ITEM_DST_NAME);
2556 ENUM_NAME_ITEM (KDBUS_ITEM_CREDS);
2557 ENUM_NAME_ITEM (KDBUS_ITEM_PID_COMM);
2558 ENUM_NAME_ITEM (KDBUS_ITEM_TID_COMM);
2559 ENUM_NAME_ITEM (KDBUS_ITEM_EXE);
2560 ENUM_NAME_ITEM (KDBUS_ITEM_CMDLINE);
2561 ENUM_NAME_ITEM (KDBUS_ITEM_CGROUP);
2562 ENUM_NAME_ITEM (KDBUS_ITEM_CAPS);
2563 ENUM_NAME_ITEM (KDBUS_ITEM_SECLABEL);
2564 ENUM_NAME_ITEM (KDBUS_ITEM_AUDIT);
2565 ENUM_NAME_ITEM (KDBUS_ITEM_CONN_DESCRIPTION);
2566 ENUM_NAME_ITEM (KDBUS_ITEM_NAME);
2567 ENUM_NAME_ITEM (KDBUS_ITEM_TIMESTAMP);
2568 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_ADD);
2569 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_REMOVE);
2570 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_CHANGE);
2571 ENUM_NAME_ITEM (KDBUS_ITEM_ID_ADD);
2572 ENUM_NAME_ITEM (KDBUS_ITEM_ID_REMOVE);
2573 ENUM_NAME_ITEM (KDBUS_ITEM_REPLY_TIMEOUT);
2574 ENUM_NAME_ITEM (KDBUS_ITEM_REPLY_DEAD);
2579 #if KDBUS_MSG_DECODE_DEBUG == 1
2581 enum_PAYLOAD (long long id)
2585 ENUM_NAME_ITEM (KDBUS_PAYLOAD_KERNEL);
2586 ENUM_NAME_ITEM (KDBUS_PAYLOAD_DBUS);
2592 msg_id (uint64_t id)
2595 const char* const_ptr;
2602 snprintf (buf, sizeof (buf), "%llu", (unsigned long long)id);
2610 static dbus_uint32_t
2611 get_next_client_serial (DBusTransportKdbus *transport)
2613 dbus_uint32_t serial;
2615 serial = transport->client_serial++;
2617 if (transport->client_serial == 0)
2618 transport->client_serial = 1;
2624 * Calculates length of the kdbus message content (payload).
2626 * @param msg kdbus message
2627 * @return the length of the kdbus message's payload.
2630 kdbus_message_size (const struct kdbus_msg *msg,
2633 const struct kdbus_item *item;
2637 KDBUS_ITEM_FOREACH (item, msg, items)
2639 if (item->size < KDBUS_ITEM_HEADER_SIZE)
2641 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
2646 case KDBUS_ITEM_PAYLOAD_OFF:
2647 ret_size += item->vec.size;
2649 case KDBUS_ITEM_PAYLOAD_MEMFD:
2650 ret_size += item->memfd.size;
2652 case KDBUS_ITEM_FDS:
2653 *n_fds = (item->size - KDBUS_ITEM_HEADER_SIZE) / sizeof (int);
2664 generate_NameSignal (const char *signal,
2666 DBusTransportKdbus *transport)
2668 DBusMessage *message;
2670 _dbus_verbose ("Generating %s for %s.\n", signal, name);
2672 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, signal);
2673 if (message == NULL)
2676 if (!dbus_message_append_args (message, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
2678 if (!dbus_message_set_destination (message, transport->my_DBus_unique_name))
2680 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
2682 dbus_message_set_serial (message, get_next_client_serial (transport));
2684 if (!add_message_to_received (message, transport->base.connection))
2690 dbus_message_unref (message);
2695 * The NameOwnerChanged signals take three parameters with
2696 * unique or well-known names, but only some forms actually
2699 * WELLKNOWN, "", UNIQUE → KDBUS_ITEM_NAME_ADD
2700 * WELLKNOWN, UNIQUE, "" → KDBUS_ITEM_NAME_REMOVE
2701 * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_ITEM_NAME_CHANGE
2702 * UNIQUE, "", UNIQUE → KDBUS_ITEM_ID_ADD
2703 * UNIQUE, UNIQUE, "" → KDBUS_ITEM_ID_REMOVE
2705 * For the latter two the two unique names must be identical.
2708 kdbus_handle_name_owner_changed (__u64 type,
2709 const char *bus_name,
2712 DBusTransportKdbus *transport)
2714 DBusMessage *message = NULL;
2715 DBusMessageIter args;
2717 const char *const_ptr;
2719 if ((message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) == NULL)
2722 dbus_message_iter_init_append (message, &args);
2724 // for ID_ADD and ID_REMOVE this function takes NULL as bus_name
2725 if (bus_name == NULL)
2727 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", old != 0 ? old : new);
2728 const_ptr = tmp_str;
2731 const_ptr = bus_name;
2733 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2736 _dbus_verbose ("%s\n", const_ptr);
2739 if ((old==0) && (new==0))
2741 /* kdbus generates its own set of events that can not be passed to
2742 * client without translation. */
2743 const char *src = "org.freedesktop.DBus";
2744 const char *dst = "org.freedesktop.DBus";
2746 if (type == KDBUS_ITEM_NAME_ADD || type == KDBUS_ITEM_ID_ADD)
2748 else if (type == KDBUS_ITEM_NAME_REMOVE || type == KDBUS_ITEM_ID_REMOVE)
2751 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &src))
2753 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &dst))
2756 _dbus_verbose ("[NameOwnerChanged:%s, old=%lld, new=%lld\n", __func__, old, new);
2760 // determine and append old_id
2763 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", old);
2764 const_ptr = tmp_str;
2769 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2772 _dbus_verbose ("%s\n", const_ptr);
2773 // determine and append new_id
2776 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", new);
2777 const_ptr = tmp_str;
2782 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2785 _dbus_verbose ("%s\n", const_ptr);
2788 dbus_message_set_sender (message, DBUS_SERVICE_DBUS);
2789 dbus_message_set_serial (message, get_next_client_serial (transport));
2791 if (!add_message_to_received (message, transport->base.connection))
2797 dbus_message_unref (message);
2803 handle_item_timestamp (const struct kdbus_item *item)
2805 #if KDBUS_MSG_DECODE_DEBUG == 1
2806 _dbus_verbose (" +%s (%llu bytes) realtime=%lluns monotonic=%lluns\n",
2807 enum_MSG (item->type), item->size,
2808 (unsigned long long)item->timestamp.realtime_ns,
2809 (unsigned long long)item->timestamp.monotonic_ns);
2814 handle_unexpected_item (const struct kdbus_item *item)
2816 _dbus_assert_not_reached ("unexpected item from kdbus");
2820 handle_padding (const struct kdbus_msg *msg,
2821 const struct kdbus_item *end_of_items)
2823 #if KDBUS_MSG_DECODE_DEBUG == 1
2824 if ((char *)end_of_items - ((char *)msg + msg->size) >= 8)
2825 _dbus_verbose ("invalid padding at end of message\n");
2829 #ifdef LIBDBUSPOLICY
2831 load_dbus_header (DBusTransportKdbus *transport,
2833 const char *message_data,
2834 dbus_uint32_t message_len)
2836 DBusValidity validity = DBUS_VALID;
2838 dbus_uint32_t fields_array_len_unsigned;
2839 dbus_uint32_t body_len_unsigned;
2842 if (0 == message_len)
2845 _dbus_string_init_const_len (&message, message_data, message_len);
2846 _dbus_gvariant_raw_get_lengths (&message,
2847 &fields_array_len_unsigned,
2851 _dbus_string_init_const_len (&header->data,
2853 fields_array_len_unsigned + FIRST_GVARIANT_FIELD_OFFSET);
2855 header->padding = 0;
2856 header->byte_order = message_data[0];
2857 header->protocol_version = DBUS_PROTOCOL_VERSION_GVARIANT;
2858 for (i = 0; i <= DBUS_HEADER_FIELD_LAST; i++)
2859 header->fields[i].value_pos = _DBUS_HEADER_FIELD_VALUE_NONEXISTENT;
2861 return _dbus_header_load_gvariant (header, &validity);
2866 can_receive (DBusTransportKdbus *transport,
2867 const struct kdbus_msg *msg,
2868 const char *message_data,
2869 dbus_uint32_t message_len)
2871 dbus_bool_t result = TRUE;
2873 #ifdef LIBDBUSPOLICY
2874 if (transport->policy)
2877 dbus_bool_t got_header = FALSE;
2878 dbus_bool_t got_creds = FALSE;
2879 dbus_bool_t got_seclabel = FALSE;
2881 if (KDBUS_PAYLOAD_DBUS == msg->payload_type)
2883 const struct kdbus_item *item;
2884 uid_t sender_euid = -1;
2885 gid_t sender_egid = -1;
2886 const char *seclabel = NULL;
2891 _dbus_string_init (&names);
2893 KDBUS_ITEM_FOREACH(item, msg, items)
2896 case KDBUS_ITEM_CREDS:
2897 sender_euid = (uid_t) item->creds.euid;
2898 sender_egid = (gid_t) item->creds.egid;
2899 got_creds = (sender_euid != (uid_t)-1) && (sender_egid != (gid_t)-1);
2901 case KDBUS_ITEM_SECLABEL:
2902 seclabel = item->str;
2903 got_seclabel = (seclabel != NULL);
2905 case KDBUS_ITEM_OWNED_NAME:
2908 _dbus_string_init_const (&name, item->name.name);
2909 if (_dbus_validate_bus_name (&name, 0, _dbus_string_get_length (&name)))
2911 if (_dbus_string_get_length (&names) != 0)
2912 _dbus_string_append_byte (&names, ' ');
2914 _dbus_string_copy (&name,
2917 _dbus_string_get_length (&names));
2922 break; /* ignore all other items */
2925 if (NULL != message_data && message_len > 0)
2927 if (load_dbus_header (transport, &header, message_data, message_len))
2931 _dbus_header_get_message_type (&header) != DBUS_MESSAGE_TYPE_METHOD_CALL &&
2932 _dbus_header_get_message_type (&header) != DBUS_MESSAGE_TYPE_SIGNAL)
2936 else if (got_header && got_creds && got_seclabel)
2938 const char *destination = NULL;
2939 const char *path = NULL;
2940 const char *interface = NULL;
2941 const char *member = NULL;
2942 const char *error_name = NULL;
2943 dbus_uint64_t reply_cookie = 0;
2944 dbus_bool_t requested_reply = FALSE;
2947 _dbus_header_get_field_basic (&header,
2948 DBUS_HEADER_FIELD_DESTINATION,
2952 destination = transport->my_DBus_unique_name;
2954 _dbus_header_get_field_basic (&header,
2955 DBUS_HEADER_FIELD_PATH,
2959 _dbus_header_get_field_basic (&header,
2960 DBUS_HEADER_FIELD_INTERFACE,
2964 _dbus_header_get_field_basic (&header,
2965 DBUS_HEADER_FIELD_MEMBER,
2969 _dbus_header_get_field_basic (&header,
2970 DBUS_HEADER_FIELD_ERROR_NAME,
2974 _dbus_header_get_field_basic (&header,
2975 DBUS_HEADER_FIELD_REPLY_SERIAL,
2979 requested_reply = !(_dbus_header_get_flag (&header,
2980 DBUS_HEADER_FLAG_NO_REPLY_EXPECTED));
2982 ret = dbuspolicy1_check_in (transport->policy,
2984 _dbus_string_get_length (&names) > 0 ?
2985 _dbus_string_get_const_data (&names) :
2993 _dbus_header_get_message_type (&header),
2997 result = (1 == ret);
3000 _dbus_string_free (&names);
3009 kdbus_decode_dbus_message (const struct kdbus_msg *msg,
3011 DBusTransportKdbus *kdbus_transport,
3015 const struct kdbus_item *item;
3017 char *buffer = data;
3021 KDBUS_ITEM_FOREACH (item, msg, items)
3023 if (item->size < KDBUS_ITEM_HEADER_SIZE)
3025 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
3032 case KDBUS_ITEM_PAYLOAD_OFF:
3033 memcpy (data, (char *)msg+item->vec.offset, item->vec.size);
3034 data += item->vec.size;
3035 ret_size += item->vec.size;
3037 #ifdef DBUS_ENABLE_VERBOSE_MODE
3040 debug_c_str ("Message part arrived:", (char *)msg+item->vec.offset, item->vec.size);
3044 _dbus_verbose (" +%s (%llu bytes) off=%llu size=%llu\n",
3045 enum_MSG (item->type), item->size,
3046 (unsigned long long)item->vec.offset,
3047 (unsigned long long)item->vec.size);
3050 case KDBUS_ITEM_PAYLOAD_MEMFD:
3055 size = item->memfd.size;
3056 _dbus_verbose ("memfd.size : %llu\n", (unsigned long long)size);
3058 buf = mmap (NULL, size, PROT_READ, MAP_PRIVATE, item->memfd.fd, 0);
3059 if (buf == MAP_FAILED)
3061 _dbus_verbose ("mmap () fd=%i failed:%m", item->memfd.fd);
3065 memcpy (data, buf, size);
3070 close (item->memfd.fd);
3072 _dbus_verbose (" +%s (%llu bytes) off=%llu size=%llu\n",
3073 enum_MSG (item->type), item->size,
3074 (unsigned long long)item->vec.offset,
3075 (unsigned long long)item->vec.size);
3079 case KDBUS_ITEM_FDS:
3083 *n_fds = (item->size - KDBUS_ITEM_HEADER_SIZE) / sizeof (int);
3084 memcpy (fds, item->fds, *n_fds * sizeof (int));
3085 for (i = 0; i < *n_fds; i++)
3086 _dbus_fd_set_close_on_exec (fds[i]);
3090 case KDBUS_ITEM_CREDS:
3091 #if KDBUS_MSG_DECODE_DEBUG == 1
3092 _dbus_verbose (" +%s (%llu bytes) uid=%lld, gid=%lld, pid=%lld, tid=%lld, starttime=%lld\n",
3093 enum_MSG (item->type), item->size,
3094 item->creds.uid, item->creds.gid,
3095 item->creds.pid, item->creds.tid,
3096 item->creds.starttime);
3100 case KDBUS_ITEM_PID_COMM:
3101 case KDBUS_ITEM_TID_COMM:
3102 case KDBUS_ITEM_EXE:
3103 case KDBUS_ITEM_CGROUP:
3104 case KDBUS_ITEM_SECLABEL:
3105 case KDBUS_ITEM_DST_NAME:
3106 #if KDBUS_MSG_DECODE_DEBUG == 1
3107 _dbus_verbose (" +%s (%llu bytes) '%s' (%zu)\n",
3108 enum_MSG (item->type), item->size, item->str, strlen (item->str));
3112 case KDBUS_ITEM_CMDLINE:
3113 case KDBUS_ITEM_NAME:
3114 #if KDBUS_MSG_DECODE_DEBUG == 1
3116 __u64 size = item->size - KDBUS_ITEM_HEADER_SIZE;
3117 const char *str = item->str;
3120 _dbus_verbose (" +%s (%llu bytes) ", enum_MSG (item->type), item->size);
3123 _dbus_verbose ("'%s' ", str);
3124 size -= strlen (str) + 1;
3125 str += strlen (str) + 1;
3129 _dbus_verbose ("(%d string%s)\n", count, (count == 1) ? "" : "s");
3134 case KDBUS_ITEM_AUDIT:
3135 #if KDBUS_MSG_DECODE_DEBUG == 1
3136 _dbus_verbose (" +%s (%llu bytes) loginuid=%llu sessionid=%llu\n",
3137 enum_MSG (item->type), item->size,
3138 (unsigned long long)item->data64[0],
3139 (unsigned long long)item->data64[1]);
3143 case KDBUS_ITEM_CAPS:
3144 #if KDBUS_MSG_DECODE_DEBUG == 1
3147 const uint32_t *cap;
3150 _dbus_verbose (" +%s (%llu bytes) len=%llu bytes)\n",
3151 enum_MSG (item->type), item->size,
3152 (unsigned long long)item->size - KDBUS_ITEM_HEADER_SIZE);
3155 n = (item->size - KDBUS_ITEM_HEADER_SIZE) / 4 / sizeof (uint32_t);
3157 _dbus_verbose (" CapInh=");
3158 for (i = 0; i < n; i++)
3159 _dbus_verbose ("%08x", cap[(0 * n) + (n - i - 1)]);
3161 _dbus_verbose (" CapPrm=");
3162 for (i = 0; i < n; i++)
3163 _dbus_verbose ("%08x", cap[(1 * n) + (n - i - 1)]);
3165 _dbus_verbose (" CapEff=");
3166 for (i = 0; i < n; i++)
3167 _dbus_verbose ("%08x", cap[(2 * n) + (n - i - 1)]);
3169 _dbus_verbose (" CapInh=");
3170 for (i = 0; i < n; i++)
3171 _dbus_verbose ("%08x", cap[(3 * n) + (n - i - 1)]);
3172 _dbus_verbose ("\n");
3177 case KDBUS_ITEM_TIMESTAMP:
3178 handle_item_timestamp (item);
3181 case KDBUS_ITEM_BLOOM_FILTER:
3186 handle_unexpected_item (item);
3191 handle_padding (msg, item);
3193 if (!can_receive (kdbus_transport, msg, buffer, ret_size))
3194 return 0; /* ignore message if not allowed */
3200 kdbus_decode_kernel_message (const struct kdbus_msg *msg,
3201 DBusTransportKdbus *kdbus_transport)
3203 const struct kdbus_item *item;
3206 KDBUS_ITEM_FOREACH (item, msg, items)
3208 if (item->size < KDBUS_ITEM_HEADER_SIZE)
3210 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
3217 case KDBUS_ITEM_REPLY_TIMEOUT:
3218 case KDBUS_ITEM_REPLY_DEAD:
3219 _dbus_verbose (" +%s (%llu bytes) cookie=%llu\n",
3220 enum_MSG (item->type), item->size, msg->cookie_reply);
3223 case KDBUS_ITEM_NAME_ADD:
3224 case KDBUS_ITEM_NAME_REMOVE:
3225 case KDBUS_ITEM_NAME_CHANGE:
3229 _dbus_verbose (" +%s (%llu bytes) '%s', old id=%lld, new id=%lld, old flags=0x%llx, new flags=0x%llx\n",
3230 enum_MSG (item->type), (unsigned long long) item->size,
3231 item->name_change.name, item->name_change.old_id.id,
3232 item->name_change.new_id.id, item->name_change.old_id.flags,
3233 item->name_change.new_id.flags);
3235 if (item->name_change.new_id.id == _kdbus_get_id (kdbus_transport->kdbus))
3236 ret_size = generate_NameSignal ("NameAcquired", item->name_change.name, kdbus_transport);
3237 else if (item->name_change.old_id.id == _kdbus_get_id (kdbus_transport->kdbus))
3238 ret_size = generate_NameSignal ("NameLost", item->name_change.name, kdbus_transport);
3243 if (item->name_change.new_id.flags & KDBUS_NAME_ACTIVATOR)
3244 local_ret = kdbus_handle_name_owner_changed (item->type,
3245 item->name_change.name,
3246 item->name_change.old_id.id, 0,
3248 else if (item->name_change.old_id.flags & KDBUS_NAME_ACTIVATOR)
3249 local_ret = kdbus_handle_name_owner_changed (item->type,
3250 item->name_change.name, 0,
3251 item->name_change.new_id.id,
3254 local_ret = kdbus_handle_name_owner_changed (item->type,
3255 item->name_change.name,
3256 item->name_change.old_id.id,
3257 item->name_change.new_id.id,
3259 if (local_ret == -1)
3262 ret_size += local_ret;
3266 case KDBUS_ITEM_ID_ADD:
3267 case KDBUS_ITEM_ID_REMOVE:
3268 _dbus_verbose (" +%s (%llu bytes) id=%llu flags=%llu\n",
3269 enum_MSG (item->type), (unsigned long long) item->size,
3270 (unsigned long long) item->id_change.id,
3271 (unsigned long long) item->id_change.flags);
3273 if (item->id_change.flags & KDBUS_HELLO_ACTIVATOR)
3274 ret_size = kdbus_handle_name_owner_changed (item->type, NULL, 0, 0,
3277 ret_size = kdbus_handle_name_owner_changed (item->type, NULL,
3278 item->type == KDBUS_ITEM_ID_ADD ? 0 : item->id_change.id,
3279 item->type == KDBUS_ITEM_ID_ADD ? item->id_change.id : 0,
3286 case KDBUS_ITEM_TIMESTAMP:
3287 handle_item_timestamp (item);
3291 handle_unexpected_item (item);
3296 handle_padding (msg, item);
3303 * Decodes kdbus message in order to extract DBus message and puts it into received data buffer
3304 * and file descriptor's buffer. Also captures kdbus error messages and kdbus kernel broadcasts
3305 * and converts all of them into appropriate DBus messages.
3307 * @param msg kdbus message
3308 * @param data place to copy DBus message to
3309 * @param kdbus_transport transport
3310 * @param fds place to store file descriptors received
3311 * @param n_fds place to store quantity of file descriptors received
3312 * @return number of DBus message's bytes received or -1 on error
3315 kdbus_decode_msg (const struct kdbus_msg *msg,
3317 DBusTransportKdbus *kdbus_transport,
3324 #if KDBUS_MSG_DECODE_DEBUG == 1
3325 _dbus_verbose ("MESSAGE: %s (%llu bytes) flags=0x%llx, %s → %s, cookie=%llu, timeout=%llu\n",
3326 enum_PAYLOAD (msg->payload_type),
3327 (unsigned long long) msg->size,
3328 (unsigned long long) msg->flags,
3329 msg_id (msg->src_id),
3330 msg_id (msg->dst_id),
3331 (unsigned long long) msg->cookie,
3332 (unsigned long long) msg->timeout_ns);
3335 switch (msg->payload_type)
3337 case KDBUS_PAYLOAD_DBUS:
3338 ret_size = kdbus_decode_dbus_message (msg, data, kdbus_transport, fds, n_fds);
3340 case KDBUS_PAYLOAD_KERNEL:
3341 ret_size = kdbus_decode_kernel_message (msg, kdbus_transport);
3344 _dbus_assert_not_reached ("unexpected payload type from kdbus");
3352 * Reads message from kdbus and puts it into DBus buffers
3354 * @param kdbus_transport transport
3355 * @param buffer place to copy received message to
3356 * @param fds place to store file descriptors received with the message
3357 * @param n_fds place to store quantity of file descriptors received
3358 * @return size of received message on success, -1 on error
3361 kdbus_read_message (DBusTransportKdbus *kdbus_transport,
3366 int ret_size, buf_size;
3367 struct kdbus_msg *msg;
3370 dbus_uint64_t flags = 0;
3374 dbus_error_init (&error);
3376 start = _dbus_string_get_length (buffer);
3378 if (kdbus_transport->activator != NULL)
3379 flags |= KDBUS_RECV_PEEK;
3381 ret = _kdbus_recv (kdbus_transport->kdbus, flags, 0, &msg);
3385 _dbus_verbose ("kdbus error receiving message: %d (%s)\n", ret, _dbus_strerror (ret));
3389 buf_size = kdbus_message_size (msg, n_fds);
3392 _dbus_verbose ("kdbus error - too short message: %d (%m)\n", errno);
3396 /* What is the maximum size of the locally generated message?
3397 I just assume 2048 bytes */
3398 buf_size = MAX (buf_size, 2048);
3400 if (!_dbus_string_lengthen (buffer, buf_size))
3405 data = _dbus_string_get_data_len (buffer, start, buf_size);
3407 ret_size = kdbus_decode_msg (msg, data, kdbus_transport, fds, n_fds, &error);
3409 if (ret_size == -1) /* error */
3410 _dbus_string_set_length (buffer, start);
3411 else if (ret_size >= 0 && buf_size != ret_size) /* case of locally generated message */
3412 _dbus_string_set_length (buffer, start + ret_size);
3415 _dbus_message_loader_set_unique_sender_id (kdbus_transport->base.loader, msg->src_id);
3417 if (kdbus_transport->activator != NULL)
3420 ret = _kdbus_free_mem (kdbus_transport->kdbus, msg);
3423 _dbus_verbose ("kdbus error freeing message: %d (%s)\n", ret, _dbus_strerror (ret));
3430 #ifdef ENABLE_KDBUS_SYNC_CALLS
3431 static DBusMessage *
3432 kdbus_send_sync_call (DBusTransportKdbus *transport,
3433 DBusMessage *message)
3435 DBusMessage *reply = NULL;
3437 const char *destination;
3439 dbus_message_lock (message);
3441 destination = dbus_message_get_destination (message);
3446 ret = capture_org_freedesktop_DBus ((DBusTransportKdbus*)transport, destination, message, &reply);
3453 kdbus_write_msg_internal (transport, message, destination, &reply, TRUE);
3461 dbus_error_init (&error);
3463 dbus_set_error (&error, DBUS_ERROR_FAILED,
3464 "Something went wrong");
3466 reply = reply_with_error ((char*)error.name,
3471 dbus_error_free (&error);
3475 _dbus_assert (reply != NULL);
3476 dbus_message_lock (reply);
3483 * Copy-paste from socket transport. Only renames done.
3486 free_watches (DBusTransportKdbus *kdbus_transport)
3488 DBusConnection *connection = kdbus_transport->base.connection;
3489 _dbus_verbose ("start\n");
3491 if (kdbus_transport->read_watch)
3494 _dbus_connection_remove_watch_unlocked (connection,
3495 kdbus_transport->read_watch);
3496 _dbus_watch_invalidate (kdbus_transport->read_watch);
3497 _dbus_watch_unref (kdbus_transport->read_watch);
3498 kdbus_transport->read_watch = NULL;
3501 if (kdbus_transport->write_watch)
3504 _dbus_connection_remove_watch_unlocked (connection,
3505 kdbus_transport->write_watch);
3506 _dbus_watch_invalidate (kdbus_transport->write_watch);
3507 _dbus_watch_unref (kdbus_transport->write_watch);
3508 kdbus_transport->write_watch = NULL;
3511 _dbus_verbose ("end\n");
3515 free_policies (DBusTransportKdbus *transport)
3517 #ifdef LIBDBUSPOLICY
3518 if (NULL != transport->policy)
3519 dbuspolicy1_free (transport->policy);
3524 * Copy-paste from socket transport. Only done needed renames and removed
3525 * lines related to encoded messages.
3528 transport_finalize (DBusTransport *transport)
3530 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus *)transport;
3531 _dbus_verbose ("\n");
3533 free_watches (kdbus_transport);
3535 _dbus_transport_finalize_base (transport);
3537 _dbus_assert (kdbus_transport->read_watch == NULL);
3538 _dbus_assert (kdbus_transport->write_watch == NULL);
3540 free_matchmaker (kdbus_transport->matchmaker);
3542 dbus_free (kdbus_transport->activator);
3544 free_policies ( kdbus_transport );
3546 _kdbus_free (kdbus_transport->kdbus);
3547 free (kdbus_transport->my_DBus_unique_name);
3549 dbus_free (transport);
3553 * Copy-paste from socket transport. Removed code related to authentication,
3554 * socket_transport replaced by kdbus_transport.
3557 check_write_watch (DBusTransportKdbus *kdbus_transport)
3560 DBusTransport *transport = &kdbus_transport->base;
3562 if (transport->connection == NULL)
3565 if (transport->disconnected)
3567 _dbus_assert (kdbus_transport->write_watch == NULL);
3571 _dbus_transport_ref (transport);
3573 needed = _dbus_connection_has_messages_to_send_unlocked (transport->connection);
3575 _dbus_verbose ("check_write_watch (): needed = %d on connection %p watch %p fd = %d outgoing messages exist %d\n",
3576 needed, transport->connection, kdbus_transport->write_watch,
3577 _kdbus_get_fd (kdbus_transport->kdbus),
3578 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
3580 _dbus_connection_toggle_watch_unlocked (transport->connection,
3581 kdbus_transport->write_watch,
3584 _dbus_transport_unref (transport);
3588 * Copy-paste from socket transport. Removed code related to authentication,
3589 * socket_transport replaced by kdbus_transport.
3592 check_read_watch (DBusTransportKdbus *kdbus_transport)
3594 dbus_bool_t need_read_watch;
3595 DBusTransport *transport = &kdbus_transport->base;
3597 _dbus_verbose ("fd = %d\n",_kdbus_get_fd (kdbus_transport->kdbus));
3599 if (transport->connection == NULL)
3602 if (transport->disconnected)
3604 _dbus_assert (kdbus_transport->read_watch == NULL);
3608 _dbus_transport_ref (transport);
3611 (_dbus_counter_get_size_value (transport->live_messages) < transport->max_live_messages_size) &&
3612 (_dbus_counter_get_unix_fd_value (transport->live_messages) < transport->max_live_messages_unix_fds);
3614 _dbus_verbose (" setting read watch enabled = %d\n", need_read_watch);
3616 _dbus_connection_toggle_watch_unlocked (transport->connection,
3617 kdbus_transport->read_watch,
3620 _dbus_transport_unref (transport);
3624 * Copy-paste from socket transport.
3627 do_io_error (DBusTransport *transport)
3629 _dbus_transport_ref (transport);
3630 _dbus_transport_disconnect (transport);
3631 _dbus_transport_unref (transport);
3635 * Based on do_writing from socket transport.
3636 * Removed authentication code and code related to encoded messages
3637 * and adapted to kdbus transport.
3638 * In socket transport returns false on out-of-memory. Here this won't happen,
3639 * so it always returns TRUE.
3642 do_writing (DBusTransport *transport)
3644 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3646 dbus_bool_t oom = FALSE;
3648 if (transport->disconnected)
3650 _dbus_verbose ("Not connected, not writing anything\n");
3654 _dbus_verbose ("do_writing (), have_messages = %d, fd = %d\n",
3655 _dbus_connection_has_messages_to_send_unlocked (transport->connection),
3656 _kdbus_get_fd (kdbus_transport->kdbus));
3658 while (!transport->disconnected && _dbus_connection_has_messages_to_send_unlocked (transport->connection))
3661 DBusMessage *message;
3663 const DBusString *header;
3664 const DBusString *body;
3665 const char* pDestination;
3667 if (total > kdbus_transport->max_bytes_written_per_iteration)
3669 _dbus_verbose ("%d bytes exceeds %d bytes written per iteration, returning\n",
3670 total, kdbus_transport->max_bytes_written_per_iteration);
3675 message = _dbus_connection_get_message_to_send (transport->connection);
3676 _dbus_assert (message != NULL);
3677 pDestination = dbus_message_get_destination (message);
3683 ret = capture_org_freedesktop_DBus ((DBusTransportKdbus*)transport, pDestination, message, &reply);
3684 if (ret < 0) //error
3689 else if (ret == 0) //message captured and handled correctly
3691 /* puts locally generated reply into received messages queue */
3692 if (!add_message_to_received (reply, kdbus_transport->base.connection))
3698 _dbus_message_get_network_data (message, &header, &body);
3699 bytes_written = _dbus_string_get_length (header) + _dbus_string_get_length (body);
3702 //else send as regular message
3705 bytes_written = kdbus_write_msg (kdbus_transport, message, pDestination);
3708 if (bytes_written < 0)
3710 if (errno == ENOMEM)
3716 /* EINTR already handled for us */
3718 /* For some discussion of why we also ignore EPIPE here, see
3719 * http://lists.freedesktop.org/archives/dbus/2008-March/009526.html
3722 if (_dbus_get_is_errno_eagain_or_ewouldblock (errno) || _dbus_get_is_errno_epipe (errno))
3726 _dbus_verbose ("Error writing to remote app: %s\n", _dbus_strerror_from_errno ());
3727 do_io_error (transport);
3733 #if defined (DBUS_ENABLE_VERBOSE_MODE) || !defined (DBUS_DISABLE_ASSERT)
3734 int total_bytes_to_write;
3736 _dbus_message_get_network_data (message, &header, &body);
3737 total_bytes_to_write = _dbus_string_get_length (header)
3738 + _dbus_string_get_length (body);
3739 _dbus_verbose (" wrote %d bytes of %d\n", bytes_written,
3740 total_bytes_to_write);
3742 _dbus_assert (bytes_written == total_bytes_to_write);
3744 total += bytes_written;
3746 _dbus_connection_message_sent_unlocked (transport->connection,
3759 * Based on do_reading from socket transport.
3760 * Removed authentication code and code related to encoded messages
3761 * and adapted to kdbus transport.
3762 * returns false on out-of-memory
3765 do_reading (DBusTransport *transport)
3767 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3770 dbus_bool_t oom = FALSE;
3774 _dbus_verbose ("fd = %d\n", _kdbus_get_fd (kdbus_transport->kdbus));
3778 /* See if we've exceeded max messages and need to disable reading */
3779 if (kdbus_transport->activator == NULL)
3780 check_read_watch (kdbus_transport);
3782 if (total > kdbus_transport->max_bytes_read_per_iteration)
3784 _dbus_verbose ("%d bytes exceeds %d bytes read per iteration, returning\n",
3785 total, kdbus_transport->max_bytes_read_per_iteration);
3789 _dbus_assert (kdbus_transport->read_watch != NULL ||
3790 transport->disconnected);
3792 if (transport->disconnected)
3795 if (!dbus_watch_get_enabled (kdbus_transport->read_watch))
3798 if (!_dbus_message_loader_get_unix_fds (transport->loader, &fds, &n_fds))
3800 _dbus_verbose ("Out of memory reading file descriptors\n");
3804 _dbus_message_loader_get_buffer (transport->loader, &buffer);
3806 bytes_read = kdbus_read_message (kdbus_transport, buffer, fds, &n_fds);
3808 if (bytes_read >= 0 && n_fds > 0)
3809 _dbus_verbose ("Read %i unix fds\n", n_fds);
3811 _dbus_message_loader_return_buffer (transport->loader,
3813 _dbus_message_loader_return_unix_fds (transport->loader, fds, bytes_read < 0 ? 0 : n_fds);
3817 /* EINTR already handled for us */
3819 if (_dbus_get_is_errno_enomem (errno))
3821 _dbus_verbose ("Out of memory in read()/do_reading()\n");
3825 else if (_dbus_get_is_errno_eagain_or_ewouldblock (errno))
3829 _dbus_verbose ("Error reading from remote app: %s\n",
3830 _dbus_strerror_from_errno ());
3831 do_io_error (transport);
3835 else if (bytes_read > 0)
3837 _dbus_verbose (" read %d bytes\n", bytes_read);
3839 total += bytes_read;
3841 if (!_dbus_transport_queue_messages (transport))
3844 _dbus_verbose (" out of memory when queueing messages we just read in the transport\n");
3848 /* Try reading more data until we get EAGAIN and return, or
3849 * exceed max bytes per iteration. If in blocking mode of
3850 * course we'll block instead of returning.
3854 /* 0 == bytes_read is for kernel and ignored messages */
3863 * Copy-paste from socket transport, with socket replaced by kdbus.
3866 unix_error_with_read_to_come (DBusTransport *itransport,
3870 DBusTransportKdbus *transport = (DBusTransportKdbus *) itransport;
3872 if (!((flags & DBUS_WATCH_HANGUP) || (flags & DBUS_WATCH_ERROR)))
3875 /* If we have a read watch enabled ...
3876 we -might have data incoming ... => handle the HANGUP there */
3877 if (watch != transport->read_watch && _dbus_watch_get_enabled (transport->read_watch))
3884 * Copy-paste from socket transport. Removed authentication related code
3885 * and renamed socket_transport to kdbus_transport.
3888 kdbus_handle_watch (DBusTransport *transport,
3892 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3894 _dbus_assert (watch == kdbus_transport->read_watch ||
3895 watch == kdbus_transport->write_watch);
3896 _dbus_assert (watch != NULL);
3898 /* If we hit an error here on a write watch, don't disconnect the transport yet because data can
3899 * still be in the buffer and do_reading may need several iteration to read
3900 * it all (because of its max_bytes_read_per_iteration limit).
3902 if (!(flags & DBUS_WATCH_READABLE) && unix_error_with_read_to_come (transport, watch, flags))
3904 _dbus_verbose ("Hang up or error on watch\n");
3905 _dbus_transport_disconnect (transport);
3909 if (watch == kdbus_transport->read_watch &&
3910 (flags & DBUS_WATCH_READABLE))
3912 _dbus_verbose ("handling read watch %p flags = %x\n",
3915 if (!do_reading (transport))
3917 _dbus_verbose ("no memory to read\n");
3921 else if (watch == kdbus_transport->write_watch &&
3922 (flags & DBUS_WATCH_WRITABLE))
3924 _dbus_verbose ("handling write watch, have_outgoing_messages = %d\n",
3925 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
3927 if (!do_writing (transport))
3929 _dbus_verbose ("no memory to write\n");
3933 /* See if we still need the write watch */
3934 check_write_watch (kdbus_transport);
3941 * Copy-paste from socket transport, but socket_transport renamed to kdbus_transport
3942 * and _dbus_close_socket replaced with close ().
3945 kdbus_disconnect (DBusTransport *transport)
3947 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3949 _dbus_verbose ("\n");
3951 free_watches (kdbus_transport);
3953 _kdbus_close (kdbus_transport->kdbus);
3957 * Copy-paste from socket transport. Renamed socket_transport to
3958 * kdbus_transport and added setting authenticated to TRUE, because
3959 * we do not perform authentication in kdbus, so we have mark is as already done
3960 * to make everything work.
3963 kdbus_connection_set (DBusTransport *transport)
3965 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3967 _dbus_watch_set_handler (kdbus_transport->write_watch,
3968 _dbus_connection_handle_watch,
3969 transport->connection, NULL);
3971 _dbus_watch_set_handler (kdbus_transport->read_watch,
3972 _dbus_connection_handle_watch,
3973 transport->connection, NULL);
3975 if (!_dbus_connection_add_watch_unlocked (transport->connection,
3976 kdbus_transport->write_watch))
3979 if (!_dbus_connection_add_watch_unlocked (transport->connection,
3980 kdbus_transport->read_watch))
3982 _dbus_connection_remove_watch_unlocked (transport->connection,
3983 kdbus_transport->write_watch);
3987 check_read_watch (kdbus_transport);
3988 check_write_watch (kdbus_transport);
3994 * Copy-paste from socket_transport.
3995 * Socket_transport renamed to kdbus_transport
3997 * Original dbus copy-pasted @todo comment below.
3998 * @todo We need to have a way to wake up the select sleep if
3999 * a new iteration request comes in with a flag (read/write) that
4000 * we're not currently serving. Otherwise a call that just reads
4001 * could block a write call forever (if there are no incoming
4005 kdbus_do_iteration (DBusTransport *transport,
4007 int timeout_milliseconds)
4009 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
4014 _dbus_verbose (" iteration flags = %s%s timeout = %d read_watch = %p write_watch = %p fd = %d\n",
4015 flags & DBUS_ITERATION_DO_READING ? "read" : "",
4016 flags & DBUS_ITERATION_DO_WRITING ? "write" : "",
4017 timeout_milliseconds,
4018 kdbus_transport->read_watch,
4019 kdbus_transport->write_watch,
4020 _kdbus_get_fd (kdbus_transport->kdbus));
4022 poll_fd.fd = _kdbus_get_fd (kdbus_transport->kdbus);
4027 * This fix is for reply_with_error function.
4028 * When timeout is set to -1 in client application,
4029 * error messages are inserted directly to incoming queue and
4030 * application hangs on dbus_poll.
4032 * This causes a busy loop in _dbus_connection_block_pending_call()
4033 * There is no case of waiting for the locally-generated error reply
4035 if (_dbus_connection_get_n_incoming (transport->connection) > 0)
4037 timeout_milliseconds = 0;
4041 /* This is kind of a hack; if we have stuff to write, then try
4042 * to avoid the poll. This is probably about a 5% speedup on an
4043 * echo client/server.
4045 * If both reading and writing were requested, we want to avoid this
4046 * since it could have funky effects:
4047 * - both ends spinning waiting for the other one to read
4048 * data so they can finish writing
4049 * - prioritizing all writing ahead of reading
4051 if ((flags & DBUS_ITERATION_DO_WRITING) &&
4052 !(flags & (DBUS_ITERATION_DO_READING | DBUS_ITERATION_BLOCK)) &&
4053 !transport->disconnected &&
4054 _dbus_connection_has_messages_to_send_unlocked (transport->connection))
4056 do_writing (transport);
4058 if (transport->disconnected ||
4059 !_dbus_connection_has_messages_to_send_unlocked (transport->connection))
4063 /* If we get here, we decided to do the poll() after all */
4064 _dbus_assert (kdbus_transport->read_watch);
4065 if (flags & DBUS_ITERATION_DO_READING)
4066 poll_fd.events |= _DBUS_POLLIN;
4068 _dbus_assert (kdbus_transport->write_watch);
4069 if (flags & DBUS_ITERATION_DO_WRITING)
4070 poll_fd.events |= _DBUS_POLLOUT;
4074 if ( (flags & DBUS_ITERATION_BLOCK) && !(flags & DBUS_ITERATION_DO_WRITING))
4075 poll_timeout = timeout_milliseconds;
4079 /* For blocking selects we drop the connection lock here
4080 * to avoid blocking out connection access during a potentially
4081 * indefinite blocking call. The io path is still protected
4082 * by the io_path_cond condvar, so we won't reenter this.
4084 if (flags & DBUS_ITERATION_BLOCK)
4086 _dbus_verbose ("unlock pre poll\n");
4087 _dbus_connection_unlock (transport->connection);
4091 poll_res = _dbus_poll (&poll_fd, 1, poll_timeout);
4093 if (poll_res < 0 && _dbus_get_is_errno_eintr (errno))
4096 if (flags & DBUS_ITERATION_BLOCK)
4098 _dbus_verbose ("lock post poll\n");
4099 _dbus_connection_lock (transport->connection);
4105 poll_fd.revents = 0; /* some concern that posix does not guarantee this;
4106 * valgrind flags it as an error. though it probably
4107 * is guaranteed on linux at least.
4110 if (poll_fd.revents & _DBUS_POLLERR)
4111 do_io_error (transport);
4114 dbus_bool_t need_read = (poll_fd.revents & _DBUS_POLLIN) > 0;
4116 _dbus_verbose ("in iteration, need_read=%d\n",
4119 if (need_read && (flags & DBUS_ITERATION_DO_READING))
4120 do_reading (transport);
4121 /* We always be able to write to kdbus */
4122 if (flags & DBUS_ITERATION_DO_WRITING)
4123 do_writing (transport);
4127 _dbus_verbose ("Error from _dbus_poll(): %s\n", _dbus_strerror_from_errno ());
4131 /* We need to install the write watch only if we did not
4132 * successfully write everything. Note we need to be careful that we
4133 * don't call check_write_watch *before* do_writing, since it's
4134 * inefficient to add the write watch, and we can avoid it most of
4135 * the time since we can write immediately.
4137 * However, we MUST always call check_write_watch(); DBusConnection code
4138 * relies on the fact that running an iteration will notice that
4139 * messages are pending.
4141 check_write_watch (kdbus_transport);
4143 _dbus_verbose (" ... leaving do_iteration()\n");
4147 * Copy-paste from socket transport.
4150 kdbus_live_messages_changed (DBusTransport *transport)
4152 /* See if we should look for incoming messages again */
4153 check_read_watch ((DBusTransportKdbus *)transport);
4157 * Gets file descriptor of the kdbus bus.
4158 * @param transport transport
4159 * @param fd_p place to write fd to
4160 * @returns always TRUE
4163 kdbus_get_kdbus_fd (DBusTransport *transport,
4166 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
4168 fd_p->fd = _kdbus_get_fd (kdbus_transport->kdbus);
4173 static const DBusTransportVTable kdbus_vtable = {
4177 kdbus_connection_set,
4179 kdbus_live_messages_changed,
4183 typedef unsigned long (*ConnectionInfoExtractField) (struct nameInfo *);
4185 static inline unsigned long
4186 _extract_name_info_userId (struct nameInfo *nameInfo)
4188 return nameInfo->userId;
4191 static inline unsigned long
4192 _extract_name_info_processId (struct nameInfo *nameInfo)
4194 return nameInfo->processId;
4198 _dbus_transport_kdbus_get_connection_info_ulong_field (DBusTransportKdbus *transport,
4199 ConnectionInfoExtractField function,
4202 struct nameInfo conn_info;
4205 ret = _kdbus_connection_info_by_id (transport->kdbus,
4206 _kdbus_get_id (transport->kdbus),
4212 *val = function (&conn_info);
4217 _dbus_transport_kdbus_get_unix_user (DBusTransport *transport,
4220 return _dbus_transport_kdbus_get_connection_info_ulong_field ((DBusTransportKdbus *)transport,
4221 _extract_name_info_userId,
4226 _dbus_transport_kdbus_get_unix_process_id (DBusTransport *transport,
4229 return _dbus_transport_kdbus_get_connection_info_ulong_field ((DBusTransportKdbus *)transport,
4230 _extract_name_info_processId,
4235 * Copy-paste from dbus_transport_socket with needed changes.
4237 * Creates a new transport for the given kdbus file descriptor and address.
4238 * The file descriptor must be nonblocking.
4240 * @param fd the file descriptor.
4241 * @param address the transport's address
4242 * @returns the new transport, or #NULL if no memory.
4244 static DBusTransportKdbus *
4245 new_kdbus_transport (kdbus_t *kdbus,
4246 const DBusString *address,
4247 const char *activator)
4249 DBusTransportKdbus *kdbus_transport;
4251 kdbus_transport = dbus_new0 (DBusTransportKdbus, 1);
4252 if (kdbus_transport == NULL)
4255 kdbus_transport->kdbus = kdbus;
4257 kdbus_transport->write_watch = _dbus_watch_new (_kdbus_get_fd (kdbus),
4258 DBUS_WATCH_WRITABLE,
4261 if (kdbus_transport->write_watch == NULL)
4264 kdbus_transport->read_watch = _dbus_watch_new (_kdbus_get_fd (kdbus),
4265 DBUS_WATCH_READABLE,
4268 if (kdbus_transport->read_watch == NULL)
4271 if (!_dbus_transport_init_base_authenticated (&kdbus_transport->base,
4276 _dbus_transport_set_get_unix_user_function (&kdbus_transport->base,
4277 _dbus_transport_kdbus_get_unix_user);
4278 _dbus_transport_set_get_unix_process_id_function (&kdbus_transport->base,
4279 _dbus_transport_kdbus_get_unix_process_id);
4280 #ifdef ENABLE_KDBUS_SYNC_CALLS
4281 _dbus_transport_set_send_sync_call_function (&kdbus_transport->base,
4282 (DBusTransportSendSyncCallFunction) kdbus_send_sync_call);
4284 _dbus_transport_set_assure_protocol_function (&kdbus_transport->base,
4285 _dbus_message_assure_gvariant,
4286 DBUS_PROTOCOL_VERSION_GVARIANT);
4288 /* These values should probably be tunable or something. */
4289 kdbus_transport->max_bytes_read_per_iteration = MAX_BYTES_PER_ITERATION;
4290 kdbus_transport->max_bytes_written_per_iteration = MAX_BYTES_PER_ITERATION;
4292 if (activator!=NULL)
4294 kdbus_transport->activator = _dbus_strdup (activator);
4295 if (kdbus_transport->activator == NULL)
4299 kdbus_transport->matchmaker = matchmaker_new ();
4301 kdbus_transport->client_serial = 1;
4303 return kdbus_transport;
4306 _dbus_watch_invalidate (kdbus_transport->read_watch);
4307 _dbus_watch_unref (kdbus_transport->read_watch);
4309 _dbus_watch_invalidate (kdbus_transport->write_watch);
4310 _dbus_watch_unref (kdbus_transport->write_watch);
4312 dbus_free (kdbus_transport);
4317 * Connects to kdbus, creates and sets-up transport.
4319 * @param path the path to the bus.
4320 * @param error address where an error can be returned.
4321 * @returns a new transport, or #NULL on failure.
4323 static DBusTransport*
4324 _dbus_transport_new_for_kdbus (const char *path,
4325 const char *activator,
4329 DBusTransportKdbus *transport;
4333 #ifdef DBUS_ENABLE_VERBOSE_MODE
4334 const char *dbgenv = _dbus_getenv ("G_DBUS_DEBUG");
4337 if (!strcmp (dbgenv, "message"))
4339 else if (!strcmp (dbgenv, "all"))
4344 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4346 if (!_dbus_string_init (&address))
4348 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4352 if ((!_dbus_string_append (&address, DBUS_ADDRESS_KDBUS "path=")) || (!_dbus_string_append (&address, path)))
4354 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4358 kdbus = _kdbus_new (path);
4361 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4365 ret = _kdbus_open (kdbus);
4368 dbus_set_error (error,
4369 _dbus_error_from_errno (-ret),
4370 "Failed to open file descriptor: %s: %s",
4372 _dbus_strerror (-ret));
4373 goto failed_0_with_kdbus;
4376 _dbus_verbose ("Successfully connected to kdbus bus %s\n", path);
4378 transport = new_kdbus_transport (kdbus, &address, activator);
4379 if (transport == NULL)
4381 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4385 _dbus_string_free (&address);
4387 return (DBusTransport*)transport;
4390 _kdbus_close (kdbus);
4391 failed_0_with_kdbus:
4392 _kdbus_free (kdbus);
4394 _dbus_string_free (&address);
4400 * Opens kdbus transport if method from address entry is kdbus
4402 * @param entry the address entry to open
4403 * @param transport_p return location for the opened transport
4404 * @param error place to store error
4405 * @returns result of the attempt as a DBusTransportOpenResult enum
4407 DBusTransportOpenResult
4408 _dbus_transport_open_kdbus (DBusAddressEntry *entry,
4409 DBusTransport **transport_p,
4414 method = dbus_address_entry_get_method (entry);
4415 _dbus_assert (method != NULL);
4417 if (strcmp (method, "kernel") == 0)
4419 const char *path = dbus_address_entry_get_value (entry, "path");
4420 const char *activator = dbus_address_entry_get_value (entry, "activator");
4424 _dbus_set_bad_address (error, "kdbus", "path", NULL);
4425 return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
4428 *transport_p = _dbus_transport_new_for_kdbus (path, activator, error);
4430 if (*transport_p == NULL)
4432 _DBUS_ASSERT_ERROR_IS_SET (error);
4433 return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
4437 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4438 return DBUS_TRANSPORT_OPEN_OK;
4443 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4444 return DBUS_TRANSPORT_OPEN_NOT_HANDLED;