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"
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__)
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 */
561 dbus_set_error (error,
562 DBUS_ERROR_NAME_HAS_NO_OWNER,
563 "Name \"%s\" does not exist",
569 /* when well known name is not available on the bus */
571 dbus_set_error (error,
572 DBUS_ERROR_SERVICE_UNKNOWN,
573 "The name %s was not provided by any .service files",
576 dbus_set_error (error,
577 DBUS_ERROR_NAME_HAS_NO_OWNER,
578 "Name \"%s\" does not exist",
583 dbus_set_error (error,
584 DBUS_ERROR_LIMITS_EXCEEDED,
585 "The maximum number of pending replies per connection has been reached");
590 dbus_set_error (error,
591 DBUS_ERROR_LIMITS_EXCEEDED,
592 "No space in receiver's buffer");
596 dbus_set_error (error,
598 "Connection does not receive a reply");
602 dbus_set_error (error,
604 "Something went wrong: %s",
605 _dbus_strerror (ret));
615 kdbus_close_message (DBusTransportKdbus *transport, struct kdbus_msg *msg)
617 struct kdbus_item *item;
619 KDBUS_ITEM_FOREACH (item, msg, items)
621 if (item->type == KDBUS_ITEM_PAYLOAD_MEMFD)
622 close (item->memfd.fd);
625 _kdbus_free_mem (transport->kdbus, msg);
628 #ifdef DBUS_ENABLE_VERBOSE_MODE
630 debug_c_str (const char *msg, const char *str, int len)
633 fprintf (stderr, "%s\n", msg);
634 for (i = 0; i < len; i++)
636 fprintf (stderr, "%02x ", (unsigned char)str[i]);
637 if (i%16==15) fprintf (stderr, "\n");
639 fprintf (stderr, "\n");
643 debug_str (const char *msg, const DBusString *str)
645 debug_c_str (msg, _dbus_string_get_const_data (str), _dbus_string_get_length (str));
651 can_send (DBusTransportKdbus *transport,
652 DBusMessage *message)
655 int ret = DBUSPOLICY_RESULT_ALLOW;
656 if (NULL != transport->policy)
658 dbus_uint32_t reply_serial = dbus_message_get_reply_serial (message);
660 /* If reply_serial is non-zero, then it is a reply - just send it.
661 * Otherwise - check the policy.
663 if (0 == reply_serial)
664 ret = dbuspolicy1_check_out (transport->policy,
665 dbus_message_get_destination (message),
666 dbus_message_get_sender (message),
667 dbus_message_get_path (message),
668 dbus_message_get_interface (message),
669 dbus_message_get_member (message),
670 dbus_message_get_type (message),
671 dbus_message_get_error_name (message),
673 !dbus_message_get_no_reply (message));
680 /* function prototypes */
681 static int kdbus_message_size (const struct kdbus_msg *msg,
683 static int kdbus_decode_dbus_message (const struct kdbus_msg *msg,
685 DBusTransportKdbus *kdbus_transport,
690 kdbus_write_msg_internal (DBusTransportKdbus *transport,
691 DBusMessage *message,
692 const char *destination,
693 DBusMessage **sync_reply,
694 dbus_bool_t check_privileges)
696 struct kdbus_msg *msg = NULL;
697 struct kdbus_msg *msg_reply = NULL;
698 struct kdbus_item *item;
699 uint64_t dst_id = KDBUS_DST_ID_BROADCAST;
700 const DBusString *header;
701 const DBusString *body;
702 int64_t ret_size = -1;
703 uint64_t body_size = 0;
704 uint64_t header_size = 0;
708 const char* header_data;
711 dbus_uint64_t items_size;
712 dbus_uint64_t flags = 0;
713 dbus_uint64_t timeout_ns_or_cookie_reply = 0;
714 dbus_bool_t check_sync_reply = FALSE;
716 dbus_error_init (&error);
718 if (sync_reply != NULL)
719 check_sync_reply = TRUE;
721 // determine destination and destination id
726 _dbus_string_init_const (&str, destination);
727 if (!_dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str)))
729 _dbus_verbose ("error: unique name is not valid: %s\n", destination);
733 dst_id = parse_name (destination);
737 dst_id = KDBUS_DST_ID_NAME; /* OK, this is zero anyway
738 * but leave it in case
739 * the kdbus constant changes
743 _dbus_message_get_network_data (message, &header, &body);
744 header_size = _dbus_string_get_length (header);
745 body_size = _dbus_string_get_length (body);
746 ret_size = header_size + body_size;
748 /* check whether we can and should use memfd */
749 if ((dst_id != KDBUS_DST_ID_BROADCAST) && (ret_size > MEMFD_SIZE_THRESHOLD))
750 memfd = kdbus_acquire_memfd ();
752 _dbus_message_get_unix_fds (message, &unix_fds, &fds_count);
754 items_size = _kdbus_compute_msg_items_size (transport->kdbus,
761 if (!dbus_message_get_auto_start (message))
762 flags |= KDBUS_MSG_NO_AUTO_START;
764 if (KDBUS_DST_ID_BROADCAST == dst_id) /* signals */
765 flags |= KDBUS_MSG_SIGNAL;
768 if (dbus_message_get_no_reply (message)) /* method replies and errors */
769 timeout_ns_or_cookie_reply = dbus_message_get_reply_serial (message);
770 else /* method calls */
772 long tv_sec, tv_usec;
773 int timeout_ms = _dbus_message_get_timeout_ms(message);
775 _dbus_get_monotonic_time (&tv_sec, &tv_usec);
777 timeout_ns_or_cookie_reply = 1U | ( /* ensure nonzero */
778 (dbus_uint64_t)tv_sec * 1000ULL * 1000ULL * 1000ULL
779 + tv_usec * 1000ULL + (
780 timeout_ms == -1 ? _DBUS_DEFAULT_TIMEOUT_VALUE * 1000000LLU :
781 timeout_ms == DBUS_TIMEOUT_INFINITE ? KDBUS_INFINITE_TIMEOUT_NS :
782 (uint64_t)timeout_ms * 1000000U
786 flags |= KDBUS_MSG_EXPECT_REPLY;
790 msg = _kdbus_new_msg (transport->kdbus,
797 dbus_message_get_serial (message),
798 timeout_ns_or_cookie_reply);
802 /* build message contents */
805 header_data = _dbus_string_get_const_data (header);
807 _dbus_verbose ("sending data by vec\n");
808 item = _kdbus_item_add_payload_vec (item,
810 (uintptr_t)header_data);
813 const char* body_data = _dbus_string_get_const_data (body);
815 #ifdef DBUS_ENABLE_VERBOSE_MODE
818 debug_str ("Header to send:", header);
819 debug_str ("Body to send:", body);
826 size_t body_offsets_size;
827 const char *footer_ptr;
829 /* determine body offsets size */
830 if (ret_size <= 0xFF)
831 body_offsets_size = 1;
832 else if (ret_size <= 0xFFFF)
833 body_offsets_size = 2;
834 else if (ret_size <= 0xFFFFFFFF)
835 body_offsets_size = 4;
837 body_offsets_size = 8;
839 /* check footer size */
840 footer_ptr = body_data + body_size - body_offsets_size -1;
841 while (footer_ptr >= body_data && (*footer_ptr) != 0)
844 if (footer_ptr < body_data)
850 /* prepare memfd for body */
851 if (prepare_mfd (memfd,
853 (footer_ptr - body_data) * sizeof(char)) == -1)
860 item = _kdbus_item_add_payload_memfd (item,
862 (footer_ptr - body_data) * sizeof(char),
866 item = _kdbus_item_add_payload_vec (item,
867 (body_data + body_size - footer_ptr) * sizeof(char),
868 (uintptr_t)footer_ptr);
872 while (body_size > 0)
874 dbus_uint64_t part_size = body_size;
876 if (part_size > KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE)
877 part_size = KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE;
879 _dbus_verbose ("attaching body part\n");
880 item = _kdbus_item_add_payload_vec (item,
882 (uintptr_t)body_data);
883 body_data += part_size;
884 body_size -= part_size;
890 item = _kdbus_item_add_fds (item, unix_fds, fds_count);
892 if (NULL != destination)
893 item = _kdbus_item_add_string (item,
896 strlen (destination) + 1);
897 else if (dst_id == KDBUS_DST_ID_BROADCAST)
899 struct kdbus_bloom_filter *filter = NULL;
900 item = _kdbus_item_add_bloom_filter (item,
903 setup_bloom_filter_for_message (message, transport->kdbus, filter);
907 if (check_privileges)
911 check = can_send (transport, message);
913 if (check != DBUSPOLICY_RESULT_ALLOW)
919 case DBUSPOLICY_RESULT_DENY:
920 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
921 "Cannot send message - message rejected due to XML security policies",
925 case DBUSPOLICY_RESULT_DEST_NOT_AVAILABLE:
926 reply = reply_with_error (DBUS_ERROR_SERVICE_UNKNOWN, NULL,
927 "Cannot send message - destination not known",
931 case DBUSPOLICY_RESULT_KDBUS_ERROR:
932 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
933 "Cannot send message - message rejected due to internal libdbuspolicy error (kdbus)",
937 case DBUSPOLICY_RESULT_CYNARA_ERROR:
938 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
939 "Cannot send message - message rejected due to internal libdbuspolicy error (Cynara)",
944 reply = reply_with_error (DBUS_ERROR_ACCESS_DENIED, NULL,
945 "Cannot send message - unknown libdbuspolicy error",
956 if (check_sync_reply)
962 /* puts locally generated reply into received messages queue */
963 if (!add_message_to_received (reply, transport->base.connection))
968 } /* ret != DBUSPOLICY_RESULT_ALLOW */
969 } /* check_privileges */
972 if (send_message (transport,
975 dbus_message_get_destination (message),
976 dbus_message_get_auto_start (message),
980 DBusMessage *reply = NULL;
982 if (dbus_error_is_set (&error))
984 reply = reply_with_error (error.name,
996 if (check_sync_reply)
1002 /* puts locally generated reply into received messages queue */
1003 if (!add_message_to_received (reply, transport->base.connection))
1010 if (check_sync_reply)
1013 int size, ret, *fds;
1017 /* check message size */
1018 size = kdbus_message_size (msg_reply, &n_fds);
1022 kdbus_close_message (transport, msg_reply);
1026 /* alloc buffer for decoded message */
1027 data = dbus_malloc (sizeof (char) * size);
1031 kdbus_close_message (transport, msg_reply);
1035 /* alloc palce for fds */
1036 fds = dbus_malloc (sizeof (int) * (n_fds + 1));
1038 /* decode dbus message */
1039 ret = kdbus_decode_dbus_message (msg_reply, data,
1040 transport, fds, &n_fds);
1044 kdbus_close_message (transport, msg_reply);
1048 _dbus_string_init_const_len (&str, data, ret);
1050 /* create DBusMessage from kmsg */
1051 *sync_reply = _dbus_decode_kmsg (&str, msg_reply->src_id, fds, n_fds);
1052 if (*sync_reply == NULL)
1055 kdbus_close_message (transport, msg_reply);
1062 _kdbus_free_msg (msg);
1070 * Sends DBus message using kdbus.
1071 * Handles broadcasts and unicast messages, and passing of Unix fds.
1072 * Also can locally generate error replies on some error returned by kernel.
1074 * TODO refactor to be more compact - maybe we can send header always as a payload vector
1075 * and only message body as memfd if needed.
1077 * @param transport Transport.
1078 * @param message DBus message to be sent
1079 * @param destination Destination of the message.
1080 * @returns bytes sent or -1 if sending failed
1083 kdbus_write_msg (DBusTransportKdbus *transport,
1084 DBusMessage *message,
1085 const char *destination)
1087 return kdbus_write_msg_internal (transport, message, destination, NULL, TRUE);
1090 static dbus_uint64_t
1091 get_pool_size (void)
1093 dbus_uint64_t receive_pool_size = RECEIVE_POOL_SIZE_DEFAULT_SIZE;
1094 const char *env_pool;
1096 env_pool = _dbus_getenv (RECEIVE_POOL_SIZE_ENV_VAR_NAME);
1099 dbus_uint64_t size = 0;
1100 unsigned int multiply = 1;
1103 page_size = sysconf (_SC_PAGESIZE);
1104 if (page_size == -1)
1110 size = strtoul (env_pool, (char**)&env_pool, 10);
1111 if ((errno == EINVAL) || size == 0)
1117 if (*env_pool == 'k')
1122 else if (*env_pool == 'M')
1124 multiply = 1024 * 1024;
1128 if (*env_pool != '\0')
1134 receive_pool_size = size * multiply;
1136 if ((receive_pool_size > RECEIVE_POOL_SIZE_MAX_MBYTES * 1024 * 1024) ||
1137 (receive_pool_size < RECEIVE_POOL_SIZE_MIN_KBYTES * 1024) ||
1138 ((receive_pool_size & (page_size - 1)) != 0)) //pool size must be aligned to page size
1144 _dbus_warn ("%s value is invalid, default value %luB will be used.\n", RECEIVE_POOL_SIZE_ENV_VAR_NAME,
1145 RECEIVE_POOL_SIZE_DEFAULT_SIZE);
1146 _dbus_warn ("Correct value must be between %ukB and %uMB and must be aligned to page size: %ldB.\n",
1147 RECEIVE_POOL_SIZE_MIN_KBYTES, RECEIVE_POOL_SIZE_MAX_MBYTES, page_size);
1149 receive_pool_size = RECEIVE_POOL_SIZE_DEFAULT_SIZE;
1153 _dbus_verbose ("Receive pool size set to %llu.\n", (unsigned long long)receive_pool_size);
1154 return receive_pool_size;
1157 static dbus_uint64_t
1158 get_attach_flags_recv (DBusTransportKdbus *transport)
1160 dbus_uint64_t attach_flags_recv = 0;
1162 #ifdef LIBDBUSPOLICY
1163 attach_flags_recv = KDBUS_ATTACH_CREDS | KDBUS_ATTACH_NAMES | KDBUS_ATTACH_SECLABEL;
1166 return attach_flags_recv;
1170 * Performs kdbus hello - registration on the kdbus bus
1171 * needed to send and receive messages on the bus,
1172 * and configures transport.
1173 * As a result unique id on he bus is obtained.
1175 * @see KDBUS_HELLO_* flags in kdbus.h
1177 * @param transport transport structure
1178 * @param registration_flags aditional flags to modify registration process
1179 * @returns #TRUE on success
1182 bus_register_kdbus (DBusTransportKdbus *transport,
1183 dbus_uint32_t registration_flags,
1187 dbus_uint64_t flags;
1189 flags = KDBUS_HELLO_ACCEPT_FD;
1190 if (registration_flags & REGISTER_FLAG_MONITOR)
1191 flags |= KDBUS_HELLO_MONITOR;
1193 ret = _kdbus_hello (transport->kdbus,
1196 get_attach_flags_recv (transport),
1198 transport->activator,
1202 dbus_set_error (error, DBUS_ERROR_FAILED, "Hello failed: %d", -ret);
1206 transport->my_DBus_unique_name = create_unique_name_from_unique_id (_kdbus_get_id (transport->kdbus));
1207 if (NULL == transport->my_DBus_unique_name)
1209 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, "Hello post failed: %d", -ret);
1213 _dbus_verbose ("-- Our peer ID is: %llu\n", (unsigned long long)_kdbus_get_id (transport->kdbus));
1219 can_own (DBusTransportKdbus *transport,
1222 dbus_bool_t result = TRUE;
1224 #ifdef LIBDBUSPOLICY
1225 if (NULL != transport->policy)
1226 result = (dbuspolicy1_can_own (transport->policy, name) == 1);
1233 request_DBus_name (DBusTransportKdbus *transport,
1238 DBusString service_name_real;
1239 const DBusString *service_name = &service_name_real;
1241 dbus_uint32_t flags;
1243 if (!dbus_message_get_args (msg, error,
1244 DBUS_TYPE_STRING, &name,
1245 DBUS_TYPE_UINT32, &flags,
1249 _dbus_string_init_const (&service_name_real, name);
1251 if (!_dbus_validate_bus_name (service_name, 0,
1252 _dbus_string_get_length (service_name)))
1254 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1255 "Requested bus name \"%s\" is not valid", name);
1257 _dbus_verbose ("Attempt to acquire invalid service name\n");
1262 if (_dbus_string_get_byte (service_name, 0) == ':')
1264 /* Not allowed; only base services can start with ':' */
1265 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1266 "Cannot acquire a service starting with ':' such as \"%s\"", name);
1268 _dbus_verbose ("Attempt to acquire invalid base service name \"%s\"", name);
1273 if (_dbus_string_equal_c_str (service_name, DBUS_SERVICE_DBUS))
1275 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1276 "Connection is not allowed to own the service \"%s\"because "
1277 "it is reserved for D-Bus' use only", DBUS_SERVICE_DBUS);
1281 if (!can_own (transport, name))
1283 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1284 "Connection \"%s\" is not allowed to own the "
1285 "service \"%s\" due to security policies",
1286 transport->my_DBus_unique_name,
1291 *result = _kdbus_request_name (transport->kdbus, name, flags);
1292 if (*result == -EPERM)
1294 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1295 "Kdbus doesn't allow %s to own the service \"%s\"",
1296 transport->my_DBus_unique_name, _dbus_string_get_const_data (service_name));
1299 else if (*result < 0)
1301 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired, %d, %m", name, errno);
1309 release_DBus_name (DBusTransportKdbus *transport,
1315 DBusString service_name;
1317 if (!dbus_message_get_args (msg, error,
1318 DBUS_TYPE_STRING, &name,
1322 _dbus_string_init_const (&service_name, name);
1324 if (!_dbus_validate_bus_name (&service_name, 0,
1325 _dbus_string_get_length (&service_name)))
1327 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1328 "Given bus name \"%s\" is not valid",
1329 _dbus_string_get_const_data (&service_name));
1331 _dbus_verbose ("Attempt to release invalid service name\n");
1335 if (_dbus_string_get_byte (&service_name, 0) == ':')
1337 /* Not allowed; the base service name cannot be created or released */
1338 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1339 "Cannot release a service starting with ':' such as \"%s\"",
1340 _dbus_string_get_const_data (&service_name));
1342 _dbus_verbose ("Attempt to release invalid base service name \"%s\"",
1343 _dbus_string_get_const_data (&service_name));
1347 if (_dbus_string_equal_c_str (&service_name, DBUS_SERVICE_DBUS))
1349 /* Not allowed; the base service name cannot be created or released */
1350 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1351 "Cannot release the %s service because it is owned by the bus",
1354 _dbus_verbose ("Attempt to release service name \"%s\"",
1359 *result = _kdbus_release_name (transport->kdbus, name);
1362 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be released, %d, %m", name, errno);
1370 strcmp_existing (const char *str1, const char *str2)
1372 if (NULL == str1 || NULL == str2)
1374 return strcmp (str1, str2);
1378 is_bloom_needed (MatchRule *rule)
1383 if (_match_rule_get_message_type (rule) != DBUS_TYPE_INVALID
1384 || _match_rule_get_interface (rule) != NULL
1385 || _match_rule_get_member (rule) != NULL
1386 || _match_rule_get_path (rule) != NULL
1387 || _match_rule_get_path_namespace (rule) != NULL)
1390 rule_int = _match_rule_get_args_len (rule);
1391 for (i = 0; i < rule_int; i++)
1393 if (_match_rule_get_args (rule, i) != NULL)
1401 get_bloom (kdbus_t *kdbus, MatchRule *rule, kdbus_bloom_data_t *bloom_data)
1404 const char *rule_string;
1406 char argument_buf[sizeof ("arg")-1 + 2 + sizeof ("-slash-prefix") +1];
1408 rule_int = _match_rule_get_message_type (rule);
1409 if (rule_int != DBUS_MESSAGE_TYPE_INVALID)
1411 bloom_add_pair (bloom_data, kdbus, "message-type", dbus_message_type_to_string (rule_int));
1412 _dbus_verbose ("Adding type %s \n", dbus_message_type_to_string (rule_int));
1415 rule_string = _match_rule_get_interface (rule);
1416 if (rule_string != NULL)
1418 bloom_add_pair (bloom_data, kdbus, "interface", rule_string);
1419 _dbus_verbose ("Adding interface %s \n", rule_string);
1422 rule_string = _match_rule_get_member (rule);
1423 if (rule_string != NULL)
1425 bloom_add_pair (bloom_data, kdbus, "member", rule_string);
1426 _dbus_verbose ("Adding member %s \n", rule_string);
1429 rule_string = _match_rule_get_path (rule);
1430 if (rule_string != NULL)
1432 bloom_add_pair (bloom_data, kdbus, "path", rule_string);
1433 _dbus_verbose ("Adding path %s \n", rule_string);
1436 rule_string = _match_rule_get_path_namespace (rule);
1437 if (rule_string != NULL)
1439 bloom_add_pair (bloom_data, kdbus, "path-slash-prefix", rule_string);
1440 _dbus_verbose ("Adding path-slash-prefix %s \n", rule_string);
1443 rule_int = _match_rule_get_args_len (rule);
1444 for (i = 0; i < rule_int; i++)
1446 rule_string = _match_rule_get_args (rule, i);
1447 if (rule_string != NULL)
1449 unsigned int rule_arg_lens = _match_rule_get_arg_lens (rule, i);
1450 if (rule_arg_lens & MATCH_ARG_IS_PATH)
1452 snprintf (argument_buf, sizeof (argument_buf), "arg%d-slash-prefix", i);
1453 bloom_add_prefixes (bloom_data, kdbus, argument_buf, rule_string, '/');
1455 else if (rule_arg_lens & MATCH_ARG_NAMESPACE)
1457 snprintf (argument_buf, sizeof (argument_buf), "arg%d-dot-prefix", i);
1458 bloom_add_prefixes (bloom_data, kdbus, argument_buf, rule_string, '.');
1462 snprintf (argument_buf, sizeof (argument_buf), "arg%d", i);
1463 bloom_add_pair (bloom_data, kdbus, argument_buf, rule_string);
1470 * Adds a match rule to match broadcast messages going through the message bus.
1471 * Do no affect messages addressed directly.
1473 * TODO add error reporting
1475 * @param transport transport
1479 add_match_kdbus (DBusTransportKdbus *transport,
1482 struct kdbus_cmd_match *cmd;
1483 struct kdbus_item *item;
1485 uint64_t src_id = KDBUS_MATCH_ID_ANY;
1487 dbus_bool_t need_bloom = FALSE;
1489 const char *rule_sender;
1490 const char *rule_arg0 = NULL;
1493 rule_cookie = match_rule_get_cookie (rule);
1494 rule_sender = _match_rule_get_sender (rule);
1497 * First check if it is org.freedesktop.DBus's NameOwnerChanged or any
1498 * org.freedesktop.DBus combination that includes this,
1499 * because it must be converted to special kdbus rule (kdbus has separate rules
1500 * for kdbus (kernel) generated broadcasts).
1502 if (!strcmp_existing (rule_sender, DBUS_SERVICE_DBUS))
1504 int message_type = _match_rule_get_message_type (rule);
1506 if ((DBUS_MESSAGE_TYPE_INVALID == message_type || DBUS_MESSAGE_TYPE_SIGNAL == message_type)
1507 && !strcmp_existing (_match_rule_get_interface (rule), DBUS_INTERFACE_DBUS)
1508 && !strcmp_existing (_match_rule_get_path (rule), DBUS_PATH_DBUS))
1510 if (_match_rule_get_args_len(rule) == 1)
1512 rule_arg0 = _match_rule_get_args(rule, 0);
1516 _dbus_string_init_const (&str, rule_arg0);
1517 ret = _dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str));
1522 if (!strcmp_existing (_match_rule_get_member (rule), "NameOwnerChanged"))
1524 ret = _kdbus_add_match_name_change (transport->kdbus,
1534 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1535 ret, _dbus_strerror (ret));
1539 _dbus_verbose ("Added match rule for kernel correctly.\n");
1541 ret = _kdbus_add_match_id_change (transport->kdbus,
1549 _dbus_verbose ("Failed adding match rule for adding id for daemon, error: %d, %s\n",
1550 ret, _dbus_strerror (ret));
1554 else if (strcmp (_match_rule_get_member (rule), "NameAcquired") == 0)
1556 ret = _kdbus_add_match_name_acquired (transport->kdbus,
1561 _kdbus_get_id (transport->kdbus),
1566 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1567 ret, _dbus_strerror (ret));
1571 else if (strcmp (_match_rule_get_member (rule), "NameLost") == 0)
1573 ret = _kdbus_add_match_name_lost (transport->kdbus,
1576 _kdbus_get_id (transport->kdbus),
1583 _dbus_verbose ("Failed adding match rule for name removal for daemon, error: %d, %s\n",
1584 ret, _dbus_strerror (ret));
1589 /* Sender=DBUS_SERVICE_DBUS matches (as opposed to wildcard sender) need no standard rule. */
1595 * standard rule - registered in general way, for non-kernel broadcasts
1596 * kdbus doesn't use it to check kdbus (kernel) generated broadcasts
1599 need_bloom = is_bloom_needed (rule);
1601 if (rule_sender != NULL)
1604 _dbus_string_init_const (&str, rule_sender);
1606 if (!_dbus_validate_bus_name (&str, 0, _dbus_string_get_length (&str)))
1609 src_id = parse_name (rule_sender);
1611 /* well-known name */
1612 src_id = KDBUS_MATCH_ID_ANY;
1618 items_size = _kdbus_compute_match_items_size (transport->kdbus,
1623 cmd = _kdbus_new_cmd_match (transport->kdbus,
1632 if (NULL != rule_sender) /* well-known name */
1634 item = _kdbus_item_add_string (item,
1637 strlen (rule_sender) + 1);
1638 _dbus_verbose ("Adding sender %s \n", rule_sender);
1640 else if (KDBUS_MATCH_ID_ANY != src_id) /* unique id */
1642 item = _kdbus_item_add_id (item, src_id);
1643 _dbus_verbose ("Adding src_id %llu \n", (unsigned long long)src_id);
1649 item = _kdbus_item_add_bloom_mask (item, transport->kdbus, &bloom);
1650 get_bloom (transport->kdbus, rule, bloom);
1653 ret = _kdbus_add_match (transport->kdbus, cmd);
1655 _kdbus_free_cmd_match (cmd);
1660 _dbus_verbose ("Failed adding match bus rule cookie %llu,\nerror: %d, %s\n",
1661 rule_cookie, ret, _dbus_strerror (ret));
1665 _dbus_verbose ("Added match bus rule %llu\n", rule_cookie);
1669 static DBusMessage *
1670 capture_org_freedesktop_DBus_Hello (DBusTransportKdbus *transport,
1671 DBusMessage *message,
1674 DBusMessageIter args;
1675 dbus_uint32_t registration_flags = 0;
1677 dbus_message_iter_init (message, &args);
1678 if (dbus_message_iter_get_arg_type (&args) == DBUS_TYPE_UINT32)
1679 dbus_message_iter_get_basic (&args, ®istration_flags);
1681 if (!bus_register_kdbus (transport, registration_flags, error))
1684 return reply_1_data (message, DBUS_TYPE_STRING, &transport->my_DBus_unique_name);
1687 free (transport->my_DBus_unique_name);
1691 static DBusMessage *
1692 capture_org_freedesktop_DBus_RequestName (DBusTransportKdbus *transport,
1693 DBusMessage *message,
1698 if (!request_DBus_name (transport, message, &result, error))
1701 return reply_1_data (message, DBUS_TYPE_UINT32, &result);
1704 static DBusMessage *
1705 capture_org_freedesktop_DBus_ReleaseName (DBusTransportKdbus *transport,
1706 DBusMessage *message,
1711 if (!release_DBus_name (transport, message, &result, error))
1714 return reply_1_data (message, DBUS_TYPE_UINT32, &result);
1717 static DBusMessage *
1718 capture_org_freedesktop_DBus_AddMatch (DBusTransportKdbus *transport,
1719 DBusMessage *message,
1724 MatchRule *rule = NULL;
1725 DBusConnection *connection = transport->base.connection;
1727 if (!dbus_message_get_args (message, error,
1728 DBUS_TYPE_STRING, &arg,
1732 _dbus_string_init_const (&arg_str, arg);
1734 rule = match_rule_parse (connection, &arg_str, error);
1738 if (!matchmaker_add_rule (transport->matchmaker, rule))
1740 dbus_set_error_const (error, DBUS_ERROR_NO_MEMORY, "No memory to store match rule");
1744 if (!add_match_kdbus (transport, rule))
1746 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match rule, %s",
1747 _dbus_strerror_from_errno ());
1751 match_rule_unref (rule);
1752 return dbus_message_new_method_return (message);
1756 match_rule_unref (rule);
1757 _dbus_verbose ("Error during AddMatch in lib: %s, %s\n", error->name, error->message);
1761 static dbus_uint64_t
1762 get_match_cookie_for_remove (Matchmaker *matchmaker, MatchRule *rule_to_remove)
1764 DBusList *rules = matchmaker_get_rules_list (matchmaker, rule_to_remove);
1767 DBusList *link = _dbus_list_get_last_link (&rules);
1768 while (NULL != link)
1770 if (match_rule_equal_lib (link->data, rule_to_remove))
1772 return match_rule_get_cookie (link->data);
1774 link = _dbus_list_get_prev_link (&rules, link);
1780 static DBusMessage *
1781 capture_org_freedesktop_DBus_RemoveMatch (DBusTransportKdbus *transport,
1782 DBusMessage *message,
1787 MatchRule *rule = NULL;
1788 DBusConnection *connection = transport->base.connection;
1789 dbus_uint64_t cookie;
1791 if (!dbus_message_get_args (message, error,
1792 DBUS_TYPE_STRING, &arg,
1796 _dbus_string_init_const (&arg_str, arg);
1798 rule = match_rule_parse (connection, &arg_str, error);
1801 cookie = get_match_cookie_for_remove (transport->matchmaker, rule);
1804 dbus_set_error (error,
1805 DBUS_ERROR_MATCH_RULE_NOT_FOUND,
1806 "The given match rule wasn't found and can't be removed");
1810 int ret = _kdbus_remove_match (transport->kdbus, cookie);
1812 dbus_set_error (error,
1813 _dbus_error_from_errno (ret),
1814 "Could not remove match rule");
1816 if (!dbus_error_is_set (error))
1817 matchmaker_remove_rule_by_value (transport->matchmaker, rule, error);
1820 match_rule_unref (rule);
1823 if (dbus_error_is_set (error))
1825 _dbus_verbose ("Error during RemoveMatch in lib: %s, %s\n",
1831 return dbus_message_new_method_return (message);
1835 get_connection_info_by_name (DBusMessage *message,
1837 struct nameInfo *info,
1838 DBusTransportKdbus *transport,
1840 dbus_bool_t getLabel)
1843 if (!dbus_validate_bus_name (name, error))
1846 if ((ret = _kdbus_connection_info_by_name (transport->kdbus, name, getLabel, info)) != 0)
1848 if (ESRCH == ret || ENXIO == ret)
1849 dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
1850 "Could not get owner of name '%s': no such name", name);
1852 dbus_set_error (error, DBUS_ERROR_FAILED,
1853 "Unable to query name %s, returned %d, errno = %d (%m).",
1857 if (info->flags & KDBUS_HELLO_ACTIVATOR)
1859 dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
1860 "Could not get owner of name '%s'", name);
1861 /* we return ESRCH - this is an indicator that name has an activator */
1867 /* This local function handles common case for org.freedesktop.DBus method handlers:
1868 * 1. gets string argument from incoming message;
1869 * 2. gets connection info for such name.
1870 * Note: if getLabel argument is set to TRUE, the caller must free info.sec_label.
1873 get_connection_info_from_message_argument (DBusMessage *message,
1875 struct nameInfo *info,
1876 DBusTransportKdbus *transport,
1877 dbus_bool_t getLabel)
1881 if (!dbus_message_get_args (message, error,
1882 DBUS_TYPE_STRING, &arg,
1886 return get_connection_info_by_name (message, error, info, transport, arg, getLabel);
1889 static DBusMessage *
1890 capture_org_freedesktop_DBus_GetConnectionCredentials (DBusTransportKdbus *transport,
1891 DBusMessage *message,
1894 DBusMessage *reply = NULL;
1895 DBusMessageIter reply_iter;
1896 DBusMessageIter array_iter;
1897 struct nameInfo info;
1899 if (get_connection_info_from_message_argument (message, error, &info, transport, TRUE) != 0)
1902 reply = _dbus_asv_new_method_return (message, &reply_iter, &array_iter);
1906 /* we can't represent > 32-bit pids; if your system needs them, please
1907 * add ProcessID64 to the spec or something */
1908 if (info.processId <= _DBUS_UINT32_MAX)
1910 if (!_dbus_asv_add_uint32 (&array_iter, "ProcessID", info.processId))
1913 /* we can't represent > 32-bit uids; if your system needs them, please
1914 * add UnixUserID64 to the spec or something */
1915 if (info.userId <= _DBUS_UINT32_MAX)
1917 if (!_dbus_asv_add_uint32 (&array_iter, "UnixUserID", info.userId))
1921 if (info.sec_label != NULL)
1923 dbus_bool_t res = _dbus_asv_add_byte_array (&array_iter,
1924 "LinuxSecurityLabel",
1926 strlen (info.sec_label)+1);
1928 dbus_free (info.sec_label);
1934 if (!_dbus_asv_close (&reply_iter, &array_iter))
1937 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
1943 _dbus_asv_abandon (&reply_iter, &array_iter);
1944 dbus_message_unref (reply);
1950 _mac_smack_use (void)
1952 static int cached_use = -1;
1955 cached_use = access("/sys/fs/smackfs/", F_OK) >= 0;
1960 static DBusMessage *
1961 capture_org_freedesktop_DBus_GetConnectionSELinuxSecurityContext (DBusTransportKdbus *transport,
1962 DBusMessage *message,
1965 struct nameInfo info;
1967 if (get_connection_info_from_message_argument (message, error, &info, transport, TRUE) != 0)
1970 if (info.sec_label != NULL)
1972 if (_mac_smack_use())
1974 dbus_set_error (error, DBUS_ERROR_SELINUX_SECURITY_CONTEXT_UNKNOWN,
1975 "Could not determine security context");
1976 dbus_free (info.sec_label);
1982 reply = reply_fixed_array (message, DBUS_TYPE_BYTE,
1984 strlen (info.sec_label)+1);
1986 dbus_free (info.sec_label);
1992 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, "Operation not supported");
1998 static DBusMessage *
1999 capture_org_freedesktop_DBus_GetConnectionUnixProcessID (DBusTransportKdbus *transport,
2000 DBusMessage *message,
2003 struct nameInfo info;
2004 dbus_uint32_t processId;
2006 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0 ||
2007 info.processId > _DBUS_UINT32_MAX)
2010 processId = info.processId;
2012 return reply_1_data (message, DBUS_TYPE_UINT32, &processId);
2015 static DBusMessage *
2016 capture_org_freedesktop_DBus_GetConnectionUnixUser (DBusTransportKdbus *transport,
2017 DBusMessage *message,
2020 struct nameInfo info;
2021 dbus_uint32_t userId;
2023 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0 ||
2024 info.userId > _DBUS_UINT32_MAX)
2027 userId = info.userId;
2029 return reply_1_data (message, DBUS_TYPE_UINT32, &userId);
2032 static DBusMessage *
2033 capture_org_freedesktop_DBus_GetId (DBusTransportKdbus *transport,
2034 DBusMessage *message,
2037 dbus_uint64_t bus_id_size = _kdbus_get_bus_id_size ();
2038 char bus_id[bus_id_size*2+1];
2039 char *bus_id_ptr = bus_id;
2040 char *bus_id_original = _kdbus_get_bus_id (transport->kdbus);
2041 dbus_uint64_t i = 0;
2042 for (; i < bus_id_size; i++)
2043 snprintf (bus_id + 2*i, sizeof (bus_id) - 2*i, "%02x", bus_id_original[i]);
2044 return reply_1_data (message, DBUS_TYPE_STRING, &bus_id_ptr);
2047 static DBusMessage *
2048 capture_org_freedesktop_DBus_GetNameOwner (DBusTransportKdbus *transport,
2049 DBusMessage *message,
2053 struct nameInfo info;
2057 if (!dbus_message_get_args (message, error,
2058 DBUS_TYPE_STRING, &arg,
2062 if (strcmp (arg, DBUS_SERVICE_DBUS) == 0)
2064 if (-1 == asprintf (&unique_name, "%s", DBUS_SERVICE_DBUS))
2069 if (get_connection_info_by_name (message, error, &info, transport, arg, FALSE) != 0)
2072 unique_name = create_unique_name_from_unique_id (info.uniqueId);
2073 if (NULL == unique_name)
2077 reply = reply_1_data (message, DBUS_TYPE_STRING, &unique_name);
2084 static DBusMessage *
2085 reply_listNames (DBusTransportKdbus *transport,
2086 DBusMessage *message,
2088 dbus_uint64_t flags)
2090 DBusMessage *reply = NULL;
2091 dbus_uint64_t prev_id = 0;
2093 /* First, get the list from kdbus */
2095 struct kdbus_info *name_list, *name;
2098 DBusMessageIter iter;
2099 DBusMessageIter array_iter;
2101 ret = _kdbus_list (transport->kdbus,
2107 dbus_set_error (error, DBUS_ERROR_FAILED, "Error listing names");
2111 /* Compose the reply on the fly */
2112 reply = dbus_message_new_method_return (message);
2116 dbus_message_iter_init_append (reply, &iter);
2117 if (!dbus_message_iter_open_container (&iter,
2119 DBUS_TYPE_STRING_AS_STRING,
2123 KDBUS_FOREACH (name, name_list, list_size)
2125 struct kdbus_item *item;
2127 if ((flags & KDBUS_LIST_UNIQUE) && name->id != prev_id)
2131 char *unique_name = create_unique_name_from_unique_id (name->id);
2133 if (NULL == unique_name)
2136 res = dbus_message_iter_append_basic (&array_iter,
2145 KDBUS_ITEM_FOREACH (item, name, items)
2147 if (item->type == KDBUS_ITEM_OWNED_NAME)
2149 DBusError local_error;
2150 char *name_ptr = item->name.name;
2152 dbus_error_init ( &local_error );
2153 if (!dbus_validate_bus_name (name_ptr, &local_error))
2156 if (flags & KDBUS_LIST_QUEUED)
2157 name_ptr = create_unique_name_from_unique_id (name->id);
2159 if (NULL == name_ptr)
2162 if (!dbus_message_iter_append_basic (&array_iter,
2167 if (flags & KDBUS_LIST_QUEUED)
2173 if (!dbus_message_iter_close_container (&iter, &array_iter))
2176 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
2179 _kdbus_free_mem (transport->kdbus, name_list);
2184 dbus_message_iter_abandon_container (&iter, &array_iter);
2187 dbus_message_unref (reply);
2189 _kdbus_free_mem (transport->kdbus, name_list);
2193 static DBusMessage *
2194 capture_org_freedesktop_DBus_ListActivatableNames (DBusTransportKdbus *transport,
2195 DBusMessage *message,
2198 return reply_listNames (transport, message, error, KDBUS_LIST_ACTIVATORS);
2201 static DBusMessage *
2202 capture_org_freedesktop_DBus_ListNames (DBusTransportKdbus *transport,
2203 DBusMessage *message,
2206 return reply_listNames (transport, message, error, KDBUS_LIST_UNIQUE | KDBUS_LIST_NAMES);
2209 static DBusMessage *
2210 capture_org_freedesktop_DBus_ListQueuedOwners (DBusTransportKdbus *transport,
2211 DBusMessage *message,
2214 struct nameInfo info;
2216 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0)
2219 return reply_listNames (transport, message, error, KDBUS_LIST_QUEUED);
2222 static DBusMessage *
2223 capture_org_freedesktop_DBus_NameHasOwner (DBusTransportKdbus *transport,
2224 DBusMessage *message,
2227 struct nameInfo info;
2228 dbus_bool_t result = TRUE;
2230 if (get_connection_info_from_message_argument (message, error, &info, transport, FALSE) != 0)
2232 if (dbus_error_is_set (error) && dbus_error_has_name (error, DBUS_ERROR_NAME_HAS_NO_OWNER))
2235 dbus_error_free (error);
2241 return reply_1_data (message, DBUS_TYPE_BOOLEAN, &result);
2244 static DBusMessage *
2245 capture_org_freedesktop_DBus_ReloadConfig (DBusTransportKdbus *transport,
2246 DBusMessage *message,
2249 DBusMessageIter iter;
2250 DBusMessage *reply = NULL;
2252 dbus_message_iter_init (message, &iter);
2253 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_STRUCT)
2255 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
2256 "Call to 'ReloadConfig' has wrong args");
2260 reply = dbus_message_new_method_return (message);
2264 if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS))
2270 dbus_message_unref (reply);
2274 static DBusMessage *
2275 capture_org_freedesktop_DBus_StartServiceByName (DBusTransportKdbus *transport,
2276 DBusMessage *message,
2279 struct nameInfo info;
2281 dbus_uint32_t flags; /* Spec says: not used, but we check the syntax anyway */
2283 dbus_bool_t dbus_service = FALSE;
2285 if (!dbus_message_get_args (message, error,
2286 DBUS_TYPE_STRING, &name,
2287 DBUS_TYPE_UINT32, &flags,
2291 dbus_service = (strncmp (name, DBUS_SERVICE_DBUS, strlen (DBUS_SERVICE_DBUS) + 1) == 0);
2294 ret = get_connection_info_by_name (message,
2301 if (dbus_service || 0 == ret)
2303 dbus_uint32_t status = DBUS_START_REPLY_ALREADY_RUNNING;
2304 return reply_1_data (message, DBUS_TYPE_UINT32, &status);
2306 else if (-ESRCH == ret) /* there is an activator */
2308 DBusMessage *sub_message;
2310 /* if we are here, then we have error set - free place for possible real error */
2311 dbus_error_free (error);
2313 /* send method call to org.freedesktop.DBus.Peer.Ping */
2314 sub_message = dbus_message_new_method_call (name, "/", DBUS_INTERFACE_PEER, "Ping");
2315 if (sub_message == NULL)
2318 /* The serial number here is set to -1. A message needs a valid serial number.
2319 * We do not have access to connection's serial numbers counter, so we need to make up one.
2320 * -1 is the last valid serial, so we hope that we'll never get there, especially with 64-bit
2323 dbus_message_set_serial (sub_message, -1);
2325 dbus_message_lock (sub_message);
2327 if (kdbus_write_msg_internal (transport, sub_message, name, NULL, FALSE) == -1)
2331 dbus_uint32_t status = DBUS_START_REPLY_SUCCESS;
2332 return reply_1_data (message, DBUS_TYPE_UINT32, &status);
2338 * There was an error set in get_connection_info_by_name()
2339 * We want to have another error return from StartServiceByName.
2341 dbus_error_free (error);
2342 dbus_set_error (error,
2343 DBUS_ERROR_SERVICE_UNKNOWN,
2344 "The name %s was not provided by any .service files",
2351 static DBusMessage *
2352 capture_org_freedesktop_DBus_UpdateActivationEnvironment (DBusTransportKdbus *transport,
2353 DBusMessage *message,
2356 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
2357 "'%s' method not supported", dbus_message_get_member (message));
2361 typedef DBusMessage * (*CaptureHandler)(DBusTransportKdbus *, DBusMessage *, DBusError *);
2362 struct CaptureHandlers {
2363 const char *method_name;
2364 CaptureHandler handler;
2367 #define HANDLER_ELEMENT(x) {#x, capture_org_freedesktop_DBus_##x}
2369 /* This is to cut the code to parts, and keep it organized:
2370 * an array of elements of type, as in example:
2371 * { "RequestName", capture_org_freedesktop_DBus_RequestName }
2372 * That is, a method of name RequestName will be handled by capture_org_freedesktop_DBus_RequestName ().
2374 static struct CaptureHandlers capture_handlers[] =
2376 // "Hello" is handled separately
2377 // HANDLER_ELEMENT (Hello),
2378 HANDLER_ELEMENT (RequestName),
2379 HANDLER_ELEMENT (ReleaseName),
2380 HANDLER_ELEMENT (AddMatch),
2381 HANDLER_ELEMENT (RemoveMatch),
2382 HANDLER_ELEMENT (GetConnectionCredentials),
2383 HANDLER_ELEMENT (GetConnectionSELinuxSecurityContext),
2384 HANDLER_ELEMENT (GetConnectionUnixProcessID),
2385 HANDLER_ELEMENT (GetConnectionUnixUser),
2386 HANDLER_ELEMENT (GetId),
2387 HANDLER_ELEMENT (GetNameOwner),
2388 HANDLER_ELEMENT (ListActivatableNames),
2389 HANDLER_ELEMENT (ListNames),
2390 HANDLER_ELEMENT (ListQueuedOwners),
2391 HANDLER_ELEMENT (NameHasOwner),
2392 HANDLER_ELEMENT (ReloadConfig),
2393 HANDLER_ELEMENT (StartServiceByName),
2394 HANDLER_ELEMENT (UpdateActivationEnvironment)
2398 * Looks over messages sent to org.freedesktop.DBus. Hello message, which performs
2399 * registration on the bus, is captured as it must be locally converted into
2400 * appropriate ioctl. AddMatch and RemoveMatch are captured to store match rules
2401 * locally in case of false positive result of kdbus bloom filters, but after
2402 * being read they are passed to org.freedesktop.DBus to register these rules
2404 * All the rest org.freedesktop.DBus methods are left untouched
2405 * and they are sent to dbus-daemon in the same way as every other messages.
2407 * @param transport Transport
2408 * @param message Message being sent.
2410 1 if message is not captured and should be passed to kdbus
2411 * 0 if message was handled locally and correctly (it includes proper return of error reply),
2412 * -1 message to org.freedesktop.DBus was not handled correctly.
2415 capture_org_freedesktop_DBus (DBusTransportKdbus *transport,
2416 const char *destination,
2417 DBusMessage *message,
2418 DBusMessage **reply)
2421 if (!strcmp (destination, DBUS_SERVICE_DBUS))
2423 if (!strcmp (dbus_message_get_interface (message), DBUS_INTERFACE_DBUS))
2426 const char *member = dbus_message_get_member (message);
2428 dbus_error_init (&error);
2430 if (!strcmp (member, "Hello"))
2432 *reply = capture_org_freedesktop_DBus_Hello (transport, message, &error);
2437 int handlers_size = sizeof (capture_handlers)/sizeof (capture_handlers[0]);
2439 while (i < handlers_size && strcmp (member, capture_handlers[i].method_name) != 0)
2442 if (i < handlers_size)
2444 *reply = capture_handlers[i].handler (transport, message, &error);
2448 dbus_set_error (&error, DBUS_ERROR_UNKNOWN_METHOD,
2449 "org.freedesktop.DBus does not understand message %s", member);
2453 if (*reply == NULL && dbus_error_is_set (&error))
2455 *reply = reply_with_error ((char*)error.name,
2459 dbus_error_free (&error);
2467 } /* id DBUS_INTERFACE_DBUS */
2468 } /* if DBUS_SERVICE_DBUS */
2473 #ifdef DBUS_ENABLE_VERBOSE_MODE
2474 #define ENUM_NAME_ITEM(x) case x : return #x
2477 enum_MSG (long long id)
2481 ENUM_NAME_ITEM (_KDBUS_ITEM_NULL);
2482 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_VEC);
2483 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_OFF);
2484 ENUM_NAME_ITEM (KDBUS_ITEM_PAYLOAD_MEMFD);
2485 ENUM_NAME_ITEM (KDBUS_ITEM_FDS);
2486 ENUM_NAME_ITEM (KDBUS_ITEM_BLOOM_PARAMETER);
2487 ENUM_NAME_ITEM (KDBUS_ITEM_BLOOM_FILTER);
2488 ENUM_NAME_ITEM (KDBUS_ITEM_DST_NAME);
2489 ENUM_NAME_ITEM (KDBUS_ITEM_CREDS);
2490 ENUM_NAME_ITEM (KDBUS_ITEM_PID_COMM);
2491 ENUM_NAME_ITEM (KDBUS_ITEM_TID_COMM);
2492 ENUM_NAME_ITEM (KDBUS_ITEM_EXE);
2493 ENUM_NAME_ITEM (KDBUS_ITEM_CMDLINE);
2494 ENUM_NAME_ITEM (KDBUS_ITEM_CGROUP);
2495 ENUM_NAME_ITEM (KDBUS_ITEM_CAPS);
2496 ENUM_NAME_ITEM (KDBUS_ITEM_SECLABEL);
2497 ENUM_NAME_ITEM (KDBUS_ITEM_AUDIT);
2498 ENUM_NAME_ITEM (KDBUS_ITEM_CONN_DESCRIPTION);
2499 ENUM_NAME_ITEM (KDBUS_ITEM_NAME);
2500 ENUM_NAME_ITEM (KDBUS_ITEM_TIMESTAMP);
2501 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_ADD);
2502 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_REMOVE);
2503 ENUM_NAME_ITEM (KDBUS_ITEM_NAME_CHANGE);
2504 ENUM_NAME_ITEM (KDBUS_ITEM_ID_ADD);
2505 ENUM_NAME_ITEM (KDBUS_ITEM_ID_REMOVE);
2506 ENUM_NAME_ITEM (KDBUS_ITEM_REPLY_TIMEOUT);
2507 ENUM_NAME_ITEM (KDBUS_ITEM_REPLY_DEAD);
2512 #if KDBUS_MSG_DECODE_DEBUG == 1
2514 enum_PAYLOAD (long long id)
2518 ENUM_NAME_ITEM (KDBUS_PAYLOAD_KERNEL);
2519 ENUM_NAME_ITEM (KDBUS_PAYLOAD_DBUS);
2525 msg_id (uint64_t id)
2528 const char* const_ptr;
2535 snprintf (buf, sizeof (buf), "%llu", (unsigned long long)id);
2543 static dbus_uint32_t
2544 get_next_client_serial (DBusTransportKdbus *transport)
2546 dbus_uint32_t serial;
2548 serial = transport->client_serial++;
2550 if (transport->client_serial == 0)
2551 transport->client_serial = 1;
2557 * Calculates length of the kdbus message content (payload).
2559 * @param msg kdbus message
2560 * @return the length of the kdbus message's payload.
2563 kdbus_message_size (const struct kdbus_msg *msg,
2566 const struct kdbus_item *item;
2570 KDBUS_ITEM_FOREACH (item, msg, items)
2572 if (item->size < KDBUS_ITEM_HEADER_SIZE)
2574 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
2579 case KDBUS_ITEM_PAYLOAD_OFF:
2580 ret_size += item->vec.size;
2582 case KDBUS_ITEM_PAYLOAD_MEMFD:
2583 ret_size += item->memfd.size;
2585 case KDBUS_ITEM_FDS:
2586 *n_fds = (item->size - KDBUS_ITEM_HEADER_SIZE) / sizeof (int);
2597 generate_NameSignal (const char *signal,
2599 DBusTransportKdbus *transport)
2601 DBusMessage *message;
2603 _dbus_verbose ("Generating %s for %s.\n", signal, name);
2605 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, signal);
2606 if (message == NULL)
2609 if (!dbus_message_append_args (message, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
2611 if (!dbus_message_set_destination (message, transport->my_DBus_unique_name))
2613 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
2615 dbus_message_set_serial (message, get_next_client_serial (transport));
2617 if (!add_message_to_received (message, transport->base.connection))
2623 dbus_message_unref (message);
2628 * The NameOwnerChanged signals take three parameters with
2629 * unique or well-known names, but only some forms actually
2632 * WELLKNOWN, "", UNIQUE → KDBUS_ITEM_NAME_ADD
2633 * WELLKNOWN, UNIQUE, "" → KDBUS_ITEM_NAME_REMOVE
2634 * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_ITEM_NAME_CHANGE
2635 * UNIQUE, "", UNIQUE → KDBUS_ITEM_ID_ADD
2636 * UNIQUE, UNIQUE, "" → KDBUS_ITEM_ID_REMOVE
2638 * For the latter two the two unique names must be identical.
2641 kdbus_handle_name_owner_changed (__u64 type,
2642 const char *bus_name,
2645 DBusTransportKdbus *transport)
2647 DBusMessage *message = NULL;
2648 DBusMessageIter args;
2650 const char *const_ptr;
2652 if ((message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) == NULL)
2655 dbus_message_iter_init_append (message, &args);
2657 // for ID_ADD and ID_REMOVE this function takes NULL as bus_name
2658 if (bus_name == NULL)
2660 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", old != 0 ? old : new);
2661 const_ptr = tmp_str;
2664 const_ptr = bus_name;
2666 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2669 _dbus_verbose ("%s\n", const_ptr);
2672 if ((old==0) && (new==0))
2674 /* kdbus generates its own set of events that can not be passed to
2675 * client without translation. */
2676 const char *src = "org.freedesktop.DBus";
2677 const char *dst = "org.freedesktop.DBus";
2679 if (type == KDBUS_ITEM_NAME_ADD || type == KDBUS_ITEM_ID_ADD)
2681 else if (type == KDBUS_ITEM_NAME_REMOVE || type == KDBUS_ITEM_ID_REMOVE)
2684 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &src))
2686 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &dst))
2689 _dbus_verbose ("[NameOwnerChanged:%s, old=%lld, new=%lld\n", __func__, old, new);
2693 // determine and append old_id
2696 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", old);
2697 const_ptr = tmp_str;
2702 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2705 _dbus_verbose ("%s\n", const_ptr);
2706 // determine and append new_id
2709 snprintf (tmp_str, sizeof (tmp_str), ":1.%llu", new);
2710 const_ptr = tmp_str;
2715 if (!dbus_message_iter_append_basic (&args, DBUS_TYPE_STRING, &const_ptr))
2718 _dbus_verbose ("%s\n", const_ptr);
2721 dbus_message_set_sender (message, DBUS_SERVICE_DBUS);
2722 dbus_message_set_serial (message, get_next_client_serial (transport));
2724 if (!add_message_to_received (message, transport->base.connection))
2730 dbus_message_unref (message);
2736 handle_item_timestamp (const struct kdbus_item *item)
2738 #if KDBUS_MSG_DECODE_DEBUG == 1
2739 _dbus_verbose (" +%s (%llu bytes) realtime=%lluns monotonic=%lluns\n",
2740 enum_MSG (item->type), item->size,
2741 (unsigned long long)item->timestamp.realtime_ns,
2742 (unsigned long long)item->timestamp.monotonic_ns);
2747 handle_unexpected_item (const struct kdbus_item *item)
2749 _dbus_assert_not_reached ("unexpected item from kdbus");
2753 handle_padding (const struct kdbus_msg *msg,
2754 const struct kdbus_item *end_of_items)
2756 #if KDBUS_MSG_DECODE_DEBUG == 1
2757 if ((char *)end_of_items - ((char *)msg + msg->size) >= 8)
2758 _dbus_verbose ("invalid padding at end of message\n");
2762 #ifdef LIBDBUSPOLICY
2764 load_dbus_header (DBusTransportKdbus *transport,
2766 const char *message_data,
2767 dbus_uint32_t message_len)
2769 DBusValidity validity = DBUS_VALID;
2771 dbus_uint32_t fields_array_len_unsigned;
2772 dbus_uint32_t body_len_unsigned;
2775 if (0 == message_len)
2778 _dbus_string_init_const_len (&message, message_data, message_len);
2779 _dbus_gvariant_raw_get_lengths (&message,
2780 &fields_array_len_unsigned,
2784 _dbus_string_init_const_len (&header->data,
2786 fields_array_len_unsigned + FIRST_GVARIANT_FIELD_OFFSET);
2788 header->padding = 0;
2789 header->byte_order = message_data[0];
2790 header->protocol_version = DBUS_PROTOCOL_VERSION_GVARIANT;
2791 for (i = 0; i <= DBUS_HEADER_FIELD_LAST; i++)
2792 header->fields[i].value_pos = _DBUS_HEADER_FIELD_VALUE_NONEXISTENT;
2794 return _dbus_header_load_gvariant (header, &validity);
2799 can_receive (DBusTransportKdbus *transport,
2800 const struct kdbus_msg *msg,
2801 const char *message_data,
2802 dbus_uint32_t message_len)
2804 dbus_bool_t result = TRUE;
2806 #ifdef LIBDBUSPOLICY
2807 if (transport->policy)
2810 dbus_bool_t got_header = FALSE;
2811 dbus_bool_t got_creds = FALSE;
2812 dbus_bool_t got_seclabel = FALSE;
2814 if (KDBUS_PAYLOAD_DBUS == msg->payload_type)
2816 const struct kdbus_item *item;
2817 uid_t sender_euid = -1;
2818 gid_t sender_egid = -1;
2819 const char *seclabel = NULL;
2824 _dbus_string_init (&names);
2826 KDBUS_ITEM_FOREACH(item, msg, items)
2829 case KDBUS_ITEM_CREDS:
2830 sender_euid = (uid_t) item->creds.euid;
2831 sender_egid = (gid_t) item->creds.egid;
2832 got_creds = (sender_euid != (uid_t)-1) && (sender_egid != (gid_t)-1);
2834 case KDBUS_ITEM_SECLABEL:
2835 seclabel = item->str;
2836 got_seclabel = (seclabel != NULL);
2838 case KDBUS_ITEM_OWNED_NAME:
2841 _dbus_string_init_const (&name, item->name.name);
2842 if (_dbus_validate_bus_name (&name, 0, _dbus_string_get_length (&name)))
2844 if (_dbus_string_get_length (&names) != 0)
2845 _dbus_string_append_byte (&names, ' ');
2847 _dbus_string_copy (&name,
2850 _dbus_string_get_length (&names));
2855 break; /* ignore all other items */
2858 if (NULL != message_data && message_len > 0)
2860 if (load_dbus_header (transport, &header, message_data, message_len))
2864 if (got_header && _dbus_header_get_message_type (&header) != DBUS_MESSAGE_TYPE_METHOD_CALL)
2868 else if (got_header && got_creds && got_seclabel)
2870 const char *destination = NULL;
2871 const char *path = NULL;
2872 const char *interface = NULL;
2873 const char *member = NULL;
2874 const char *error_name = NULL;
2875 dbus_uint64_t reply_cookie = 0;
2876 dbus_bool_t requested_reply = FALSE;
2879 _dbus_header_get_field_basic (&header,
2880 DBUS_HEADER_FIELD_DESTINATION,
2884 _dbus_header_get_field_basic (&header,
2885 DBUS_HEADER_FIELD_PATH,
2889 _dbus_header_get_field_basic (&header,
2890 DBUS_HEADER_FIELD_INTERFACE,
2894 _dbus_header_get_field_basic (&header,
2895 DBUS_HEADER_FIELD_MEMBER,
2899 _dbus_header_get_field_basic (&header,
2900 DBUS_HEADER_FIELD_ERROR_NAME,
2904 _dbus_header_get_field_basic (&header,
2905 DBUS_HEADER_FIELD_REPLY_SERIAL,
2909 requested_reply = !(_dbus_header_get_flag (&header,
2910 DBUS_HEADER_FLAG_NO_REPLY_EXPECTED));
2912 ret = dbuspolicy1_check_in (transport->policy,
2914 _dbus_string_get_length (&names) > 0 ?
2915 _dbus_string_get_const_data (&names) :
2923 _dbus_header_get_message_type (&header),
2927 result = (1 == ret);
2930 _dbus_string_free (&names);
2939 kdbus_decode_dbus_message (const struct kdbus_msg *msg,
2941 DBusTransportKdbus *kdbus_transport,
2945 const struct kdbus_item *item;
2947 char *buffer = data;
2951 KDBUS_ITEM_FOREACH (item, msg, items)
2953 if (item->size < KDBUS_ITEM_HEADER_SIZE)
2955 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
2962 case KDBUS_ITEM_PAYLOAD_OFF:
2963 memcpy (data, (char *)msg+item->vec.offset, item->vec.size);
2964 data += item->vec.size;
2965 ret_size += item->vec.size;
2967 #ifdef DBUS_ENABLE_VERBOSE_MODE
2970 debug_c_str ("Message part arrived:", (char *)msg+item->vec.offset, item->vec.size);
2974 _dbus_verbose (" +%s (%llu bytes) off=%llu size=%llu\n",
2975 enum_MSG (item->type), item->size,
2976 (unsigned long long)item->vec.offset,
2977 (unsigned long long)item->vec.size);
2980 case KDBUS_ITEM_PAYLOAD_MEMFD:
2985 size = item->memfd.size;
2986 _dbus_verbose ("memfd.size : %llu\n", (unsigned long long)size);
2988 buf = mmap (NULL, size, PROT_READ, MAP_PRIVATE, item->memfd.fd, 0);
2989 if (buf == MAP_FAILED)
2991 _dbus_verbose ("mmap () fd=%i failed:%m", item->memfd.fd);
2995 memcpy (data, buf, size);
3000 close (item->memfd.fd);
3002 _dbus_verbose (" +%s (%llu bytes) off=%llu size=%llu\n",
3003 enum_MSG (item->type), item->size,
3004 (unsigned long long)item->vec.offset,
3005 (unsigned long long)item->vec.size);
3009 case KDBUS_ITEM_FDS:
3013 *n_fds = (item->size - KDBUS_ITEM_HEADER_SIZE) / sizeof (int);
3014 memcpy (fds, item->fds, *n_fds * sizeof (int));
3015 for (i = 0; i < *n_fds; i++)
3016 _dbus_fd_set_close_on_exec (fds[i]);
3020 case KDBUS_ITEM_CREDS:
3021 #if KDBUS_MSG_DECODE_DEBUG == 1
3022 _dbus_verbose (" +%s (%llu bytes) uid=%lld, gid=%lld, pid=%lld, tid=%lld, starttime=%lld\n",
3023 enum_MSG (item->type), item->size,
3024 item->creds.uid, item->creds.gid,
3025 item->creds.pid, item->creds.tid,
3026 item->creds.starttime);
3030 case KDBUS_ITEM_PID_COMM:
3031 case KDBUS_ITEM_TID_COMM:
3032 case KDBUS_ITEM_EXE:
3033 case KDBUS_ITEM_CGROUP:
3034 case KDBUS_ITEM_SECLABEL:
3035 case KDBUS_ITEM_DST_NAME:
3036 #if KDBUS_MSG_DECODE_DEBUG == 1
3037 _dbus_verbose (" +%s (%llu bytes) '%s' (%zu)\n",
3038 enum_MSG (item->type), item->size, item->str, strlen (item->str));
3042 case KDBUS_ITEM_CMDLINE:
3043 case KDBUS_ITEM_NAME:
3044 #if KDBUS_MSG_DECODE_DEBUG == 1
3046 __u64 size = item->size - KDBUS_ITEM_HEADER_SIZE;
3047 const char *str = item->str;
3050 _dbus_verbose (" +%s (%llu bytes) ", enum_MSG (item->type), item->size);
3053 _dbus_verbose ("'%s' ", str);
3054 size -= strlen (str) + 1;
3055 str += strlen (str) + 1;
3059 _dbus_verbose ("(%d string%s)\n", count, (count == 1) ? "" : "s");
3064 case KDBUS_ITEM_AUDIT:
3065 #if KDBUS_MSG_DECODE_DEBUG == 1
3066 _dbus_verbose (" +%s (%llu bytes) loginuid=%llu sessionid=%llu\n",
3067 enum_MSG (item->type), item->size,
3068 (unsigned long long)item->data64[0],
3069 (unsigned long long)item->data64[1]);
3073 case KDBUS_ITEM_CAPS:
3074 #if KDBUS_MSG_DECODE_DEBUG == 1
3077 const uint32_t *cap;
3080 _dbus_verbose (" +%s (%llu bytes) len=%llu bytes)\n",
3081 enum_MSG (item->type), item->size,
3082 (unsigned long long)item->size - KDBUS_ITEM_HEADER_SIZE);
3085 n = (item->size - KDBUS_ITEM_HEADER_SIZE) / 4 / sizeof (uint32_t);
3087 _dbus_verbose (" CapInh=");
3088 for (i = 0; i < n; i++)
3089 _dbus_verbose ("%08x", cap[(0 * n) + (n - i - 1)]);
3091 _dbus_verbose (" CapPrm=");
3092 for (i = 0; i < n; i++)
3093 _dbus_verbose ("%08x", cap[(1 * n) + (n - i - 1)]);
3095 _dbus_verbose (" CapEff=");
3096 for (i = 0; i < n; i++)
3097 _dbus_verbose ("%08x", cap[(2 * n) + (n - i - 1)]);
3099 _dbus_verbose (" CapInh=");
3100 for (i = 0; i < n; i++)
3101 _dbus_verbose ("%08x", cap[(3 * n) + (n - i - 1)]);
3102 _dbus_verbose ("\n");
3107 case KDBUS_ITEM_TIMESTAMP:
3108 handle_item_timestamp (item);
3111 case KDBUS_ITEM_BLOOM_FILTER:
3116 handle_unexpected_item (item);
3121 handle_padding (msg, item);
3123 if (!can_receive (kdbus_transport, msg, buffer, ret_size))
3124 return 0; /* ignore message if not allowed */
3130 kdbus_decode_kernel_message (const struct kdbus_msg *msg,
3131 DBusTransportKdbus *kdbus_transport)
3133 const struct kdbus_item *item;
3136 KDBUS_ITEM_FOREACH (item, msg, items)
3138 if (item->size < KDBUS_ITEM_HEADER_SIZE)
3140 _dbus_verbose (" +%s (%llu bytes) invalid data record\n", enum_MSG (item->type), item->size);
3147 case KDBUS_ITEM_REPLY_TIMEOUT:
3148 case KDBUS_ITEM_REPLY_DEAD:
3149 _dbus_verbose (" +%s (%llu bytes) cookie=%llu\n",
3150 enum_MSG (item->type), item->size, msg->cookie_reply);
3153 case KDBUS_ITEM_NAME_ADD:
3154 case KDBUS_ITEM_NAME_REMOVE:
3155 case KDBUS_ITEM_NAME_CHANGE:
3159 _dbus_verbose (" +%s (%llu bytes) '%s', old id=%lld, new id=%lld, old flags=0x%llx, new flags=0x%llx\n",
3160 enum_MSG (item->type), (unsigned long long) item->size,
3161 item->name_change.name, item->name_change.old_id.id,
3162 item->name_change.new_id.id, item->name_change.old_id.flags,
3163 item->name_change.new_id.flags);
3165 if (item->name_change.new_id.id == _kdbus_get_id (kdbus_transport->kdbus))
3166 ret_size = generate_NameSignal ("NameAcquired", item->name_change.name, kdbus_transport);
3167 else if (item->name_change.old_id.id == _kdbus_get_id (kdbus_transport->kdbus))
3168 ret_size = generate_NameSignal ("NameLost", item->name_change.name, kdbus_transport);
3173 if (item->name_change.new_id.flags & KDBUS_NAME_ACTIVATOR)
3174 local_ret = kdbus_handle_name_owner_changed (item->type,
3175 item->name_change.name,
3176 item->name_change.old_id.id, 0,
3178 else if (item->name_change.old_id.flags & KDBUS_NAME_ACTIVATOR)
3179 local_ret = kdbus_handle_name_owner_changed (item->type,
3180 item->name_change.name, 0,
3181 item->name_change.new_id.id,
3184 local_ret = kdbus_handle_name_owner_changed (item->type,
3185 item->name_change.name,
3186 item->name_change.old_id.id,
3187 item->name_change.new_id.id,
3189 if (local_ret == -1)
3192 ret_size += local_ret;
3196 case KDBUS_ITEM_ID_ADD:
3197 case KDBUS_ITEM_ID_REMOVE:
3198 _dbus_verbose (" +%s (%llu bytes) id=%llu flags=%llu\n",
3199 enum_MSG (item->type), (unsigned long long) item->size,
3200 (unsigned long long) item->id_change.id,
3201 (unsigned long long) item->id_change.flags);
3203 if (item->id_change.flags & KDBUS_HELLO_ACTIVATOR)
3204 ret_size = kdbus_handle_name_owner_changed (item->type, NULL, 0, 0,
3207 ret_size = kdbus_handle_name_owner_changed (item->type, NULL,
3208 item->type == KDBUS_ITEM_ID_ADD ? 0 : item->id_change.id,
3209 item->type == KDBUS_ITEM_ID_ADD ? item->id_change.id : 0,
3216 case KDBUS_ITEM_TIMESTAMP:
3217 handle_item_timestamp (item);
3221 handle_unexpected_item (item);
3226 handle_padding (msg, item);
3233 * Decodes kdbus message in order to extract DBus message and puts it into received data buffer
3234 * and file descriptor's buffer. Also captures kdbus error messages and kdbus kernel broadcasts
3235 * and converts all of them into appropriate DBus messages.
3237 * @param msg kdbus message
3238 * @param data place to copy DBus message to
3239 * @param kdbus_transport transport
3240 * @param fds place to store file descriptors received
3241 * @param n_fds place to store quantity of file descriptors received
3242 * @return number of DBus message's bytes received or -1 on error
3245 kdbus_decode_msg (const struct kdbus_msg *msg,
3247 DBusTransportKdbus *kdbus_transport,
3254 #if KDBUS_MSG_DECODE_DEBUG == 1
3255 _dbus_verbose ("MESSAGE: %s (%llu bytes) flags=0x%llx, %s → %s, cookie=%llu, timeout=%llu\n",
3256 enum_PAYLOAD (msg->payload_type),
3257 (unsigned long long) msg->size,
3258 (unsigned long long) msg->flags,
3259 msg_id (msg->src_id),
3260 msg_id (msg->dst_id),
3261 (unsigned long long) msg->cookie,
3262 (unsigned long long) msg->timeout_ns);
3265 switch (msg->payload_type)
3267 case KDBUS_PAYLOAD_DBUS:
3268 ret_size = kdbus_decode_dbus_message (msg, data, kdbus_transport, fds, n_fds);
3270 case KDBUS_PAYLOAD_KERNEL:
3271 ret_size = kdbus_decode_kernel_message (msg, kdbus_transport);
3274 _dbus_assert_not_reached ("unexpected payload type from kdbus");
3282 * Reads message from kdbus and puts it into DBus buffers
3284 * @param kdbus_transport transport
3285 * @param buffer place to copy received message to
3286 * @param fds place to store file descriptors received with the message
3287 * @param n_fds place to store quantity of file descriptors received
3288 * @return size of received message on success, -1 on error
3291 kdbus_read_message (DBusTransportKdbus *kdbus_transport,
3296 int ret_size, buf_size;
3297 struct kdbus_msg *msg;
3300 dbus_uint64_t flags = 0;
3304 dbus_error_init (&error);
3306 start = _dbus_string_get_length (buffer);
3308 if (kdbus_transport->activator != NULL)
3309 flags |= KDBUS_RECV_PEEK;
3311 ret = _kdbus_recv (kdbus_transport->kdbus, flags, 0, &msg);
3315 _dbus_verbose ("kdbus error receiving message: %d (%s)\n", ret, _dbus_strerror (ret));
3319 buf_size = kdbus_message_size (msg, n_fds);
3322 _dbus_verbose ("kdbus error - too short message: %d (%m)\n", errno);
3326 /* What is the maximum size of the locally generated message?
3327 I just assume 2048 bytes */
3328 buf_size = MAX (buf_size, 2048);
3330 if (!_dbus_string_lengthen (buffer, buf_size))
3335 data = _dbus_string_get_data_len (buffer, start, buf_size);
3337 ret_size = kdbus_decode_msg (msg, data, kdbus_transport, fds, n_fds, &error);
3339 if (ret_size == -1) /* error */
3340 _dbus_string_set_length (buffer, start);
3341 else if (ret_size >= 0 && buf_size != ret_size) /* case of locally generated message */
3342 _dbus_string_set_length (buffer, start + ret_size);
3345 _dbus_message_loader_set_unique_sender_id (kdbus_transport->base.loader, msg->src_id);
3347 if (kdbus_transport->activator != NULL)
3350 ret = _kdbus_free_mem (kdbus_transport->kdbus, msg);
3353 _dbus_verbose ("kdbus error freeing message: %d (%s)\n", ret, _dbus_strerror (ret));
3360 static DBusMessage *
3361 kdbus_send_sync_call (DBusTransportKdbus *transport,
3362 DBusMessage *message)
3364 DBusMessage *reply = NULL;
3366 const char *destination;
3368 dbus_message_lock (message);
3370 destination = dbus_message_get_destination (message);
3375 ret = capture_org_freedesktop_DBus ((DBusTransportKdbus*)transport, destination, message, &reply);
3382 kdbus_write_msg_internal (transport, message, destination, &reply, TRUE);
3390 dbus_error_init (&error);
3392 dbus_set_error (&error, DBUS_ERROR_FAILED,
3393 "Something went wrong");
3395 reply = reply_with_error ((char*)error.name,
3400 dbus_error_free (&error);
3404 _dbus_assert (reply != NULL);
3405 dbus_message_lock (reply);
3411 * Copy-paste from socket transport. Only renames done.
3414 free_watches (DBusTransportKdbus *kdbus_transport)
3416 DBusConnection *connection = kdbus_transport->base.connection;
3417 _dbus_verbose ("start\n");
3419 if (kdbus_transport->read_watch)
3422 _dbus_connection_remove_watch_unlocked (connection,
3423 kdbus_transport->read_watch);
3424 _dbus_watch_invalidate (kdbus_transport->read_watch);
3425 _dbus_watch_unref (kdbus_transport->read_watch);
3426 kdbus_transport->read_watch = NULL;
3429 if (kdbus_transport->write_watch)
3432 _dbus_connection_remove_watch_unlocked (connection,
3433 kdbus_transport->write_watch);
3434 _dbus_watch_invalidate (kdbus_transport->write_watch);
3435 _dbus_watch_unref (kdbus_transport->write_watch);
3436 kdbus_transport->write_watch = NULL;
3439 _dbus_verbose ("end\n");
3443 free_policies (DBusTransportKdbus *transport)
3445 #ifdef LIBDBUSPOLICY
3446 if (NULL != transport->policy)
3447 dbuspolicy1_free (transport->policy);
3452 * Copy-paste from socket transport. Only done needed renames and removed
3453 * lines related to encoded messages.
3456 transport_finalize (DBusTransport *transport)
3458 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus *)transport;
3459 _dbus_verbose ("\n");
3461 free_watches (kdbus_transport);
3463 _dbus_transport_finalize_base (transport);
3465 _dbus_assert (kdbus_transport->read_watch == NULL);
3466 _dbus_assert (kdbus_transport->write_watch == NULL);
3468 free_matchmaker (kdbus_transport->matchmaker);
3470 dbus_free (kdbus_transport->activator);
3472 free_policies ( kdbus_transport );
3474 _kdbus_free (kdbus_transport->kdbus);
3475 free (kdbus_transport->my_DBus_unique_name);
3477 dbus_free (transport);
3481 * Copy-paste from socket transport. Removed code related to authentication,
3482 * socket_transport replaced by kdbus_transport.
3485 check_write_watch (DBusTransportKdbus *kdbus_transport)
3488 DBusTransport *transport = &kdbus_transport->base;
3490 if (transport->connection == NULL)
3493 if (transport->disconnected)
3495 _dbus_assert (kdbus_transport->write_watch == NULL);
3499 _dbus_transport_ref (transport);
3501 needed = _dbus_connection_has_messages_to_send_unlocked (transport->connection);
3503 _dbus_verbose ("check_write_watch (): needed = %d on connection %p watch %p fd = %d outgoing messages exist %d\n",
3504 needed, transport->connection, kdbus_transport->write_watch,
3505 _kdbus_get_fd (kdbus_transport->kdbus),
3506 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
3508 _dbus_connection_toggle_watch_unlocked (transport->connection,
3509 kdbus_transport->write_watch,
3512 _dbus_transport_unref (transport);
3516 * Copy-paste from socket transport. Removed code related to authentication,
3517 * socket_transport replaced by kdbus_transport.
3520 check_read_watch (DBusTransportKdbus *kdbus_transport)
3522 dbus_bool_t need_read_watch;
3523 DBusTransport *transport = &kdbus_transport->base;
3525 _dbus_verbose ("fd = %d\n",_kdbus_get_fd (kdbus_transport->kdbus));
3527 if (transport->connection == NULL)
3530 if (transport->disconnected)
3532 _dbus_assert (kdbus_transport->read_watch == NULL);
3536 _dbus_transport_ref (transport);
3539 (_dbus_counter_get_size_value (transport->live_messages) < transport->max_live_messages_size) &&
3540 (_dbus_counter_get_unix_fd_value (transport->live_messages) < transport->max_live_messages_unix_fds);
3542 _dbus_verbose (" setting read watch enabled = %d\n", need_read_watch);
3544 _dbus_connection_toggle_watch_unlocked (transport->connection,
3545 kdbus_transport->read_watch,
3548 _dbus_transport_unref (transport);
3552 * Copy-paste from socket transport.
3555 do_io_error (DBusTransport *transport)
3557 _dbus_transport_ref (transport);
3558 _dbus_transport_disconnect (transport);
3559 _dbus_transport_unref (transport);
3563 * Based on do_writing from socket transport.
3564 * Removed authentication code and code related to encoded messages
3565 * and adapted to kdbus transport.
3566 * In socket transport returns false on out-of-memory. Here this won't happen,
3567 * so it always returns TRUE.
3570 do_writing (DBusTransport *transport)
3572 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3574 dbus_bool_t oom = FALSE;
3576 if (transport->disconnected)
3578 _dbus_verbose ("Not connected, not writing anything\n");
3582 _dbus_verbose ("do_writing (), have_messages = %d, fd = %d\n",
3583 _dbus_connection_has_messages_to_send_unlocked (transport->connection),
3584 _kdbus_get_fd (kdbus_transport->kdbus));
3586 while (!transport->disconnected && _dbus_connection_has_messages_to_send_unlocked (transport->connection))
3589 DBusMessage *message;
3591 const DBusString *header;
3592 const DBusString *body;
3593 const char* pDestination;
3595 if (total > kdbus_transport->max_bytes_written_per_iteration)
3597 _dbus_verbose ("%d bytes exceeds %d bytes written per iteration, returning\n",
3598 total, kdbus_transport->max_bytes_written_per_iteration);
3603 message = _dbus_connection_get_message_to_send (transport->connection);
3604 _dbus_assert (message != NULL);
3605 pDestination = dbus_message_get_destination (message);
3611 ret = capture_org_freedesktop_DBus ((DBusTransportKdbus*)transport, pDestination, message, &reply);
3612 if (ret < 0) //error
3617 else if (ret == 0) //message captured and handled correctly
3619 /* puts locally generated reply into received messages queue */
3620 if (!add_message_to_received (reply, kdbus_transport->base.connection))
3626 _dbus_message_get_network_data (message, &header, &body);
3627 bytes_written = _dbus_string_get_length (header) + _dbus_string_get_length (body);
3630 //else send as regular message
3633 bytes_written = kdbus_write_msg (kdbus_transport, message, pDestination);
3636 if (bytes_written < 0)
3638 if (errno == ENOMEM)
3644 /* EINTR already handled for us */
3646 /* For some discussion of why we also ignore EPIPE here, see
3647 * http://lists.freedesktop.org/archives/dbus/2008-March/009526.html
3650 if (_dbus_get_is_errno_eagain_or_ewouldblock (errno) || _dbus_get_is_errno_epipe (errno))
3654 _dbus_verbose ("Error writing to remote app: %s\n", _dbus_strerror_from_errno ());
3655 do_io_error (transport);
3661 #if defined (DBUS_ENABLE_VERBOSE_MODE) || !defined (DBUS_DISABLE_ASSERT)
3662 int total_bytes_to_write;
3664 _dbus_message_get_network_data (message, &header, &body);
3665 total_bytes_to_write = _dbus_string_get_length (header)
3666 + _dbus_string_get_length (body);
3667 _dbus_verbose (" wrote %d bytes of %d\n", bytes_written,
3668 total_bytes_to_write);
3670 _dbus_assert (bytes_written == total_bytes_to_write);
3672 total += bytes_written;
3674 _dbus_connection_message_sent_unlocked (transport->connection,
3687 * Based on do_reading from socket transport.
3688 * Removed authentication code and code related to encoded messages
3689 * and adapted to kdbus transport.
3690 * returns false on out-of-memory
3693 do_reading (DBusTransport *transport)
3695 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3698 dbus_bool_t oom = FALSE;
3702 _dbus_verbose ("fd = %d\n", _kdbus_get_fd (kdbus_transport->kdbus));
3706 /* See if we've exceeded max messages and need to disable reading */
3707 if (kdbus_transport->activator == NULL)
3708 check_read_watch (kdbus_transport);
3710 if (total > kdbus_transport->max_bytes_read_per_iteration)
3712 _dbus_verbose ("%d bytes exceeds %d bytes read per iteration, returning\n",
3713 total, kdbus_transport->max_bytes_read_per_iteration);
3717 _dbus_assert (kdbus_transport->read_watch != NULL ||
3718 transport->disconnected);
3720 if (transport->disconnected)
3723 if (!dbus_watch_get_enabled (kdbus_transport->read_watch))
3726 if (!_dbus_message_loader_get_unix_fds (transport->loader, &fds, &n_fds))
3728 _dbus_verbose ("Out of memory reading file descriptors\n");
3732 _dbus_message_loader_get_buffer (transport->loader, &buffer);
3734 bytes_read = kdbus_read_message (kdbus_transport, buffer, fds, &n_fds);
3736 if (bytes_read >= 0 && n_fds > 0)
3737 _dbus_verbose ("Read %i unix fds\n", n_fds);
3739 _dbus_message_loader_return_buffer (transport->loader,
3741 _dbus_message_loader_return_unix_fds (transport->loader, fds, bytes_read < 0 ? 0 : n_fds);
3745 /* EINTR already handled for us */
3747 if (_dbus_get_is_errno_enomem (errno))
3749 _dbus_verbose ("Out of memory in read()/do_reading()\n");
3753 else if (_dbus_get_is_errno_eagain_or_ewouldblock (errno))
3757 _dbus_verbose ("Error reading from remote app: %s\n",
3758 _dbus_strerror_from_errno ());
3759 do_io_error (transport);
3763 else if (bytes_read > 0)
3765 _dbus_verbose (" read %d bytes\n", bytes_read);
3767 total += bytes_read;
3769 if (!_dbus_transport_queue_messages (transport))
3772 _dbus_verbose (" out of memory when queueing messages we just read in the transport\n");
3776 /* Try reading more data until we get EAGAIN and return, or
3777 * exceed max bytes per iteration. If in blocking mode of
3778 * course we'll block instead of returning.
3782 /* 0 == bytes_read is for kernel and ignored messages */
3791 * Copy-paste from socket transport, with socket replaced by kdbus.
3794 unix_error_with_read_to_come (DBusTransport *itransport,
3798 DBusTransportKdbus *transport = (DBusTransportKdbus *) itransport;
3800 if (!((flags & DBUS_WATCH_HANGUP) || (flags & DBUS_WATCH_ERROR)))
3803 /* If we have a read watch enabled ...
3804 we -might have data incoming ... => handle the HANGUP there */
3805 if (watch != transport->read_watch && _dbus_watch_get_enabled (transport->read_watch))
3812 * Copy-paste from socket transport. Removed authentication related code
3813 * and renamed socket_transport to kdbus_transport.
3816 kdbus_handle_watch (DBusTransport *transport,
3820 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3822 _dbus_assert (watch == kdbus_transport->read_watch ||
3823 watch == kdbus_transport->write_watch);
3824 _dbus_assert (watch != NULL);
3826 /* If we hit an error here on a write watch, don't disconnect the transport yet because data can
3827 * still be in the buffer and do_reading may need several iteration to read
3828 * it all (because of its max_bytes_read_per_iteration limit).
3830 if (!(flags & DBUS_WATCH_READABLE) && unix_error_with_read_to_come (transport, watch, flags))
3832 _dbus_verbose ("Hang up or error on watch\n");
3833 _dbus_transport_disconnect (transport);
3837 if (watch == kdbus_transport->read_watch &&
3838 (flags & DBUS_WATCH_READABLE))
3840 _dbus_verbose ("handling read watch %p flags = %x\n",
3843 if (!do_reading (transport))
3845 _dbus_verbose ("no memory to read\n");
3849 else if (watch == kdbus_transport->write_watch &&
3850 (flags & DBUS_WATCH_WRITABLE))
3852 _dbus_verbose ("handling write watch, have_outgoing_messages = %d\n",
3853 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
3855 if (!do_writing (transport))
3857 _dbus_verbose ("no memory to write\n");
3861 /* See if we still need the write watch */
3862 check_write_watch (kdbus_transport);
3869 * Copy-paste from socket transport, but socket_transport renamed to kdbus_transport
3870 * and _dbus_close_socket replaced with close ().
3873 kdbus_disconnect (DBusTransport *transport)
3875 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3877 _dbus_verbose ("\n");
3879 free_watches (kdbus_transport);
3881 _kdbus_close (kdbus_transport->kdbus);
3885 * Copy-paste from socket transport. Renamed socket_transport to
3886 * kdbus_transport and added setting authenticated to TRUE, because
3887 * we do not perform authentication in kdbus, so we have mark is as already done
3888 * to make everything work.
3891 kdbus_connection_set (DBusTransport *transport)
3893 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3895 _dbus_watch_set_handler (kdbus_transport->write_watch,
3896 _dbus_connection_handle_watch,
3897 transport->connection, NULL);
3899 _dbus_watch_set_handler (kdbus_transport->read_watch,
3900 _dbus_connection_handle_watch,
3901 transport->connection, NULL);
3903 if (!_dbus_connection_add_watch_unlocked (transport->connection,
3904 kdbus_transport->write_watch))
3907 if (!_dbus_connection_add_watch_unlocked (transport->connection,
3908 kdbus_transport->read_watch))
3910 _dbus_connection_remove_watch_unlocked (transport->connection,
3911 kdbus_transport->write_watch);
3915 check_read_watch (kdbus_transport);
3916 check_write_watch (kdbus_transport);
3922 * Copy-paste from socket_transport.
3923 * Socket_transport renamed to kdbus_transport
3925 * Original dbus copy-pasted @todo comment below.
3926 * @todo We need to have a way to wake up the select sleep if
3927 * a new iteration request comes in with a flag (read/write) that
3928 * we're not currently serving. Otherwise a call that just reads
3929 * could block a write call forever (if there are no incoming
3933 kdbus_do_iteration (DBusTransport *transport,
3935 int timeout_milliseconds)
3937 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
3942 _dbus_verbose (" iteration flags = %s%s timeout = %d read_watch = %p write_watch = %p fd = %d\n",
3943 flags & DBUS_ITERATION_DO_READING ? "read" : "",
3944 flags & DBUS_ITERATION_DO_WRITING ? "write" : "",
3945 timeout_milliseconds,
3946 kdbus_transport->read_watch,
3947 kdbus_transport->write_watch,
3948 _kdbus_get_fd (kdbus_transport->kdbus));
3950 poll_fd.fd = _kdbus_get_fd (kdbus_transport->kdbus);
3955 * This fix is for reply_with_error function.
3956 * When timeout is set to -1 in client application,
3957 * error messages are inserted directly to incoming queue and
3958 * application hangs on dbus_poll.
3960 * This causes a busy loop in _dbus_connection_block_pending_call()
3961 * There is no case of waiting for the locally-generated error reply
3963 if (_dbus_connection_get_n_incoming (transport->connection) > 0)
3965 timeout_milliseconds = 0;
3969 /* This is kind of a hack; if we have stuff to write, then try
3970 * to avoid the poll. This is probably about a 5% speedup on an
3971 * echo client/server.
3973 * If both reading and writing were requested, we want to avoid this
3974 * since it could have funky effects:
3975 * - both ends spinning waiting for the other one to read
3976 * data so they can finish writing
3977 * - prioritizing all writing ahead of reading
3979 if ((flags & DBUS_ITERATION_DO_WRITING) &&
3980 !(flags & (DBUS_ITERATION_DO_READING | DBUS_ITERATION_BLOCK)) &&
3981 !transport->disconnected &&
3982 _dbus_connection_has_messages_to_send_unlocked (transport->connection))
3984 do_writing (transport);
3986 if (transport->disconnected ||
3987 !_dbus_connection_has_messages_to_send_unlocked (transport->connection))
3991 /* If we get here, we decided to do the poll() after all */
3992 _dbus_assert (kdbus_transport->read_watch);
3993 if (flags & DBUS_ITERATION_DO_READING)
3994 poll_fd.events |= _DBUS_POLLIN;
3996 _dbus_assert (kdbus_transport->write_watch);
3997 if (flags & DBUS_ITERATION_DO_WRITING)
3998 poll_fd.events |= _DBUS_POLLOUT;
4002 if ( (flags & DBUS_ITERATION_BLOCK) && !(flags & DBUS_ITERATION_DO_WRITING))
4003 poll_timeout = timeout_milliseconds;
4007 /* For blocking selects we drop the connection lock here
4008 * to avoid blocking out connection access during a potentially
4009 * indefinite blocking call. The io path is still protected
4010 * by the io_path_cond condvar, so we won't reenter this.
4012 if (flags & DBUS_ITERATION_BLOCK)
4014 _dbus_verbose ("unlock pre poll\n");
4015 _dbus_connection_unlock (transport->connection);
4019 poll_res = _dbus_poll (&poll_fd, 1, poll_timeout);
4021 if (poll_res < 0 && _dbus_get_is_errno_eintr (errno))
4024 if (flags & DBUS_ITERATION_BLOCK)
4026 _dbus_verbose ("lock post poll\n");
4027 _dbus_connection_lock (transport->connection);
4033 poll_fd.revents = 0; /* some concern that posix does not guarantee this;
4034 * valgrind flags it as an error. though it probably
4035 * is guaranteed on linux at least.
4038 if (poll_fd.revents & _DBUS_POLLERR)
4039 do_io_error (transport);
4042 dbus_bool_t need_read = (poll_fd.revents & _DBUS_POLLIN) > 0;
4044 _dbus_verbose ("in iteration, need_read=%d\n",
4047 if (need_read && (flags & DBUS_ITERATION_DO_READING))
4048 do_reading (transport);
4049 /* We always be able to write to kdbus */
4050 if (flags & DBUS_ITERATION_DO_WRITING)
4051 do_writing (transport);
4055 _dbus_verbose ("Error from _dbus_poll(): %s\n", _dbus_strerror_from_errno ());
4059 /* We need to install the write watch only if we did not
4060 * successfully write everything. Note we need to be careful that we
4061 * don't call check_write_watch *before* do_writing, since it's
4062 * inefficient to add the write watch, and we can avoid it most of
4063 * the time since we can write immediately.
4065 * However, we MUST always call check_write_watch(); DBusConnection code
4066 * relies on the fact that running an iteration will notice that
4067 * messages are pending.
4069 check_write_watch (kdbus_transport);
4071 _dbus_verbose (" ... leaving do_iteration()\n");
4075 * Copy-paste from socket transport.
4078 kdbus_live_messages_changed (DBusTransport *transport)
4080 /* See if we should look for incoming messages again */
4081 check_read_watch ((DBusTransportKdbus *)transport);
4085 * Gets file descriptor of the kdbus bus.
4086 * @param transport transport
4087 * @param fd_p place to write fd to
4088 * @returns always TRUE
4091 kdbus_get_kdbus_fd (DBusTransport *transport,
4094 DBusTransportKdbus *kdbus_transport = (DBusTransportKdbus*) transport;
4096 fd_p->fd = _kdbus_get_fd (kdbus_transport->kdbus);
4101 static const DBusTransportVTable kdbus_vtable = {
4105 kdbus_connection_set,
4107 kdbus_live_messages_changed,
4111 typedef unsigned long (*ConnectionInfoExtractField) (struct nameInfo *);
4113 static inline unsigned long
4114 _extract_name_info_userId (struct nameInfo *nameInfo)
4116 return nameInfo->userId;
4119 static inline unsigned long
4120 _extract_name_info_processId (struct nameInfo *nameInfo)
4122 return nameInfo->processId;
4126 _dbus_transport_kdbus_get_connection_info_ulong_field (DBusTransportKdbus *transport,
4127 ConnectionInfoExtractField function,
4130 struct nameInfo conn_info;
4133 ret = _kdbus_connection_info_by_id (transport->kdbus,
4134 _kdbus_get_id (transport->kdbus),
4140 *val = function (&conn_info);
4145 _dbus_transport_kdbus_get_unix_user (DBusTransport *transport,
4148 return _dbus_transport_kdbus_get_connection_info_ulong_field ((DBusTransportKdbus *)transport,
4149 _extract_name_info_userId,
4154 _dbus_transport_kdbus_get_unix_process_id (DBusTransport *transport,
4157 return _dbus_transport_kdbus_get_connection_info_ulong_field ((DBusTransportKdbus *)transport,
4158 _extract_name_info_processId,
4163 * Copy-paste from dbus_transport_socket with needed changes.
4165 * Creates a new transport for the given kdbus file descriptor and address.
4166 * The file descriptor must be nonblocking.
4168 * @param fd the file descriptor.
4169 * @param address the transport's address
4170 * @returns the new transport, or #NULL if no memory.
4172 static DBusTransportKdbus *
4173 new_kdbus_transport (kdbus_t *kdbus,
4174 const DBusString *address,
4175 const char *activator)
4177 DBusTransportKdbus *kdbus_transport;
4179 kdbus_transport = dbus_new0 (DBusTransportKdbus, 1);
4180 if (kdbus_transport == NULL)
4183 kdbus_transport->kdbus = kdbus;
4185 kdbus_transport->write_watch = _dbus_watch_new (_kdbus_get_fd (kdbus),
4186 DBUS_WATCH_WRITABLE,
4189 if (kdbus_transport->write_watch == NULL)
4192 kdbus_transport->read_watch = _dbus_watch_new (_kdbus_get_fd (kdbus),
4193 DBUS_WATCH_READABLE,
4196 if (kdbus_transport->read_watch == NULL)
4199 if (!_dbus_transport_init_base_authenticated (&kdbus_transport->base,
4204 _dbus_transport_set_get_unix_user_function (&kdbus_transport->base,
4205 _dbus_transport_kdbus_get_unix_user);
4206 _dbus_transport_set_get_unix_process_id_function (&kdbus_transport->base,
4207 _dbus_transport_kdbus_get_unix_process_id);
4208 #ifdef ENABLE_KDBUS_SYNC_CALLS
4209 _dbus_transport_set_send_sync_call_function (&kdbus_transport->base,
4210 (DBusTransportSendSyncCallFunction) kdbus_send_sync_call);
4212 _dbus_transport_set_assure_protocol_function (&kdbus_transport->base,
4213 _dbus_message_assure_gvariant,
4214 DBUS_PROTOCOL_VERSION_GVARIANT);
4216 /* These values should probably be tunable or something. */
4217 kdbus_transport->max_bytes_read_per_iteration = MAX_BYTES_PER_ITERATION;
4218 kdbus_transport->max_bytes_written_per_iteration = MAX_BYTES_PER_ITERATION;
4220 if (activator!=NULL)
4222 kdbus_transport->activator = _dbus_strdup (activator);
4223 if (kdbus_transport->activator == NULL)
4227 kdbus_transport->matchmaker = matchmaker_new ();
4229 kdbus_transport->client_serial = 1;
4231 return kdbus_transport;
4234 _dbus_watch_invalidate (kdbus_transport->read_watch);
4235 _dbus_watch_unref (kdbus_transport->read_watch);
4237 _dbus_watch_invalidate (kdbus_transport->write_watch);
4238 _dbus_watch_unref (kdbus_transport->write_watch);
4240 dbus_free (kdbus_transport);
4245 initialize_policies (DBusTransportKdbus *transport, const char *path)
4247 dbus_bool_t result = TRUE;
4249 #ifdef LIBDBUSPOLICY
4250 transport->policy = dbuspolicy1_init (path);
4251 if (NULL == transport->policy)
4259 * Connects to kdbus, creates and sets-up transport.
4261 * @param path the path to the bus.
4262 * @param error address where an error can be returned.
4263 * @returns a new transport, or #NULL on failure.
4265 static DBusTransport*
4266 _dbus_transport_new_for_kdbus (const char *path,
4267 const char *activator,
4271 DBusTransportKdbus *transport;
4275 #ifdef DBUS_ENABLE_VERBOSE_MODE
4276 const char *dbgenv = _dbus_getenv ("G_DBUS_DEBUG");
4279 if (!strcmp (dbgenv, "message"))
4281 else if (!strcmp (dbgenv, "all"))
4286 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4288 if (!_dbus_string_init (&address))
4290 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4294 if ((!_dbus_string_append (&address, DBUS_ADDRESS_KDBUS "path=")) || (!_dbus_string_append (&address, path)))
4296 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4300 kdbus = _kdbus_new ();
4303 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4307 ret = _kdbus_open (kdbus, path);
4310 dbus_set_error (error,
4311 _dbus_error_from_errno (-ret),
4312 "Failed to open file descriptor: %s: %s",
4314 _dbus_strerror (-ret));
4315 goto failed_0_with_kdbus;
4318 _dbus_verbose ("Successfully connected to kdbus bus %s\n", path);
4320 transport = new_kdbus_transport (kdbus, &address, activator);
4321 if (transport == NULL)
4323 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
4327 if (!initialize_policies (transport, path))
4329 dbus_set_error (error,
4331 "Can't load dbus policy for kdbus transport");
4332 _kdbus_close (kdbus);
4333 transport_finalize ((DBusTransport*)transport);
4337 _dbus_string_free (&address);
4339 return (DBusTransport*)transport;
4342 _kdbus_close (kdbus);
4343 failed_0_with_kdbus:
4344 _kdbus_free (kdbus);
4346 _dbus_string_free (&address);
4352 * Opens kdbus transport if method from address entry is kdbus
4354 * @param entry the address entry to open
4355 * @param transport_p return location for the opened transport
4356 * @param error place to store error
4357 * @returns result of the attempt as a DBusTransportOpenResult enum
4359 DBusTransportOpenResult
4360 _dbus_transport_open_kdbus (DBusAddressEntry *entry,
4361 DBusTransport **transport_p,
4366 method = dbus_address_entry_get_method (entry);
4367 _dbus_assert (method != NULL);
4369 if (strcmp (method, "kernel") == 0)
4371 const char *path = dbus_address_entry_get_value (entry, "path");
4372 const char *activator = dbus_address_entry_get_value (entry, "activator");
4376 _dbus_set_bad_address (error, "kdbus", "path", NULL);
4377 return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
4380 *transport_p = _dbus_transport_new_for_kdbus (path, activator, error);
4382 if (*transport_p == NULL)
4384 _DBUS_ASSERT_ERROR_IS_SET (error);
4385 return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
4389 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4390 return DBUS_TRANSPORT_OPEN_OK;
4395 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4396 return DBUS_TRANSPORT_OPEN_NOT_HANDLED;