2 * dbus-transport-kdbus.c
4 * Transport layer using kdbus
6 * Created on: Jun 20, 2013
12 #include "dbus-transport.h"
13 #include "dbus-transport-kdbus.h"
14 //#include <dbus/dbus-transport-protected.h>
15 #include "dbus-transport-protected.h"
16 #include "dbus-connection-internal.h"
18 #include "dbus-watch.h"
19 #include "dbus-errors.h"
21 #include "kdbus-common.h"
22 #include <linux/types.h>
26 #include <sys/ioctl.h>
35 #define KDBUS_PART_FOREACH(part, head, first) \
36 for (part = (head)->first; \
37 (uint8_t *)(part) < (uint8_t *)(head) + (head)->size; \
38 part = KDBUS_PART_NEXT(part))
39 #define RECEIVE_POOL_SIZE (10 * 1024LU * 1024LU)
40 #define MEMFD_SIZE_THRESHOLD (2 * 1024 * 1024LU) // over this memfd is used
42 #define KDBUS_MSG_DECODE_DEBUG 0
43 //#define DBUS_AUTHENTICATION
45 #define ITER_APPEND_STR(string) \
46 if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &string)) \
52 #define MSG_ITEM_BUILD_VEC(data, datasize) \
53 item->type = KDBUS_MSG_PAYLOAD_VEC; \
54 item->size = KDBUS_PART_HEADER_SIZE + sizeof(struct kdbus_vec); \
55 item->vec.address = (unsigned long) data; \
56 item->vec.size = datasize;
59 * Opaque object representing a socket file descriptor transport.
61 typedef struct DBusTransportSocket DBusTransportSocket;
64 * Implementation details of DBusTransportSocket. All members are private.
66 struct DBusTransportSocket
68 DBusTransport base; /**< Parent instance */
69 int fd; /**< File descriptor. */
70 DBusWatch *read_watch; /**< Watch for readability. */
71 DBusWatch *write_watch; /**< Watch for writability. */
73 int max_bytes_read_per_iteration; /**< In kdbus only to control overall message size*/
74 int max_bytes_written_per_iteration; /**< In kdbus only to control overall message size*/
76 int message_bytes_written; /**< Number of bytes of current
77 * outgoing message that have
80 DBusString encoded_outgoing; /**< Encoded version of current
83 DBusString encoded_incoming; /**< Encoded version of current
86 void* kdbus_mmap_ptr; /**< Mapped memory where Kdbus (kernel) writes
87 * messages incoming to us.
89 int memfd; /**< File descriptor to special
90 * memory pool for bulk data
91 * transfer. Retrieved from
92 * Kdbus kernel module.
94 __u64 bloom_size; /**< bloom filter field size */
95 char* sender; /**< uniqe name of the sender */
99 socket_get_socket_fd (DBusTransport *transport,
102 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
104 *fd_p = socket_transport->fd;
110 * Adds locally generated message to received messages queue
113 static dbus_bool_t add_message_to_received(DBusMessage *message, DBusConnection* connection)
115 DBusList *message_link;
117 message_link = _dbus_list_alloc_link (message);
118 if (message_link == NULL)
120 dbus_message_unref (message);
124 _dbus_connection_queue_synthesized_message_link(connection, message_link);
129 static int reply_with_error(char* error_type, const char* template, const char* object, DBusMessage *message, DBusConnection* connection)
131 DBusMessage *errMessage;
132 char* error_msg = "";
136 error_msg = alloca(strlen(template) + strlen(object));
137 sprintf(error_msg, template, object);
140 error_msg = (char*)object;
142 errMessage = generate_local_error_message(dbus_message_get_serial(message), error_type, error_msg);
143 if(errMessage == NULL)
145 if (add_message_to_received(errMessage, connection))
151 static int reply_1_data(DBusMessage *message, int data_type, void* pData, DBusConnection* connection)
153 DBusMessageIter args;
156 reply = dbus_message_new_method_return(message);
159 dbus_message_set_sender(reply, DBUS_SERVICE_DBUS);
160 dbus_message_iter_init_append(reply, &args);
161 if (!dbus_message_iter_append_basic(&args, data_type, pData))
163 dbus_message_unref(reply);
166 if(add_message_to_received(reply, connection))
173 static int reply_ack(DBusMessage *message, DBusConnection* connection)
177 reply = dbus_message_new_method_return(message);
180 if(add_message_to_received(reply, connection))
186 * Retrieves file descriptor to memory pool from kdbus module.
187 * It is then used for bulk data sending.
188 * Triggered when message payload is over MEMFD_SIZE_THRESHOLD
191 static int kdbus_init_memfd(DBusTransportSocket* socket_transport)
195 if (ioctl(socket_transport->fd, KDBUS_CMD_MEMFD_NEW, &memfd) < 0) {
196 _dbus_verbose("KDBUS_CMD_MEMFD_NEW failed: \n");
200 socket_transport->memfd = memfd;
201 _dbus_verbose("kdbus_init_memfd: %d!!\n", socket_transport->memfd);
206 * Initiates Kdbus message structure.
207 * Calculates it's size, allocates memory and fills some fields.
208 * @param name Well-known name or NULL
209 * @param dst_id Numeric id of recipient
210 * @param body_size size of message body if present
211 * @param use_memfd flag to build memfd message
212 * @param fds_count number of file descriptors used
213 * @param transport transport
214 * @return initialized kdbus message
216 static struct kdbus_msg* kdbus_init_msg(const char* name, __u64 dst_id, uint64_t body_size, dbus_bool_t use_memfd, int fds_count, DBusTransportSocket *transport)
218 struct kdbus_msg* msg;
221 msg_size = sizeof(struct kdbus_msg);
223 if(use_memfd == TRUE) // bulk data - memfd - encoded and plain
224 msg_size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
226 msg_size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
228 msg_size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
232 msg_size += KDBUS_ITEM_SIZE(sizeof(int)*fds_count);
235 msg_size += KDBUS_ITEM_SIZE(strlen(name) + 1);
236 else if (dst_id == KDBUS_DST_ID_BROADCAST)
237 msg_size += KDBUS_PART_HEADER_SIZE + transport->bloom_size;
239 msg = malloc(msg_size);
242 _dbus_verbose("Error allocating memory for: %s,%s\n", _dbus_strerror (errno), _dbus_error_from_errno (errno));
246 memset(msg, 0, msg_size);
247 msg->size = msg_size;
248 msg->payload_type = KDBUS_PAYLOAD_DBUS1;
249 msg->dst_id = name ? 0 : dst_id;
250 msg->src_id = strtoull(dbus_bus_get_unique_name(transport->base.connection), NULL , 10);
256 * Builds and sends kdbus message using Dbus message.
257 * Decide whether used payload vector or memfd memory pool.
258 * Handles broadcasts and unicast messages, and passing of Unix fds.
259 * Does error handling.
260 * TODO refactor to be more compact
262 * @param transport transport
263 * @param message DBus message to be sent
264 * @param encoded flag if the message is encoded
265 * @return size of data sent
267 static int kdbus_write_msg(DBusTransportSocket *transport, DBusMessage *message, const char* destination, dbus_bool_t encoded)
269 struct kdbus_msg *msg;
270 struct kdbus_item *item;
271 uint64_t dst_id = KDBUS_DST_ID_BROADCAST;
272 const DBusString *header;
273 const DBusString *body;
274 uint64_t ret_size = 0;
275 uint64_t body_size = 0;
276 uint64_t header_size = 0;
277 dbus_bool_t use_memfd;
280 dbus_bool_t autostart;
282 // determine destination and destination id
285 dst_id = KDBUS_DST_ID_WELL_KNOWN_NAME;
286 if((destination[0] == ':') && (destination[1] == '1') && (destination[2] == '.')) /* if name starts with ":1." it is a unique name and should be send as number */
288 dst_id = strtoull(&destination[3], NULL, 10);
295 ret_size = _dbus_string_get_length (&transport->encoded_outgoing);
298 _dbus_message_get_network_data (message, &header, &body);
299 header_size = _dbus_string_get_length(header);
300 body_size = _dbus_string_get_length(body);
301 ret_size = header_size + body_size;
304 // check if message size is big enough to use memfd kdbus transport
305 use_memfd = ret_size > MEMFD_SIZE_THRESHOLD ? TRUE : FALSE;
306 if(use_memfd) kdbus_init_memfd(transport);
308 _dbus_message_get_unix_fds(message, &unix_fds, &fds_count);
310 // init basic message fields
311 msg = kdbus_init_msg(destination, dst_id, body_size, use_memfd, fds_count, transport);
312 msg->cookie = dbus_message_get_serial(message);
313 autostart = dbus_message_get_auto_start (message);
315 msg->flags |= KDBUS_MSG_FLAGS_NO_AUTO_START;
317 // build message contents
320 // case 1 - bulk data transfer - memfd - encoded and plain
325 if(ioctl(transport->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 0) < 0)
327 _dbus_verbose("memfd sealing failed: \n");
331 buf = mmap(NULL, ret_size, PROT_WRITE, MAP_SHARED, transport->memfd, 0);
332 if (buf == MAP_FAILED)
334 _dbus_verbose("mmap() fd=%i failed:%m", transport->memfd);
339 memcpy(buf, &transport->encoded_outgoing, ret_size);
342 memcpy(buf, _dbus_string_get_const_data(header), header_size);
345 memcpy(buf, _dbus_string_get_const_data(body), body_size);
350 munmap(buf, ret_size);
352 // seal data - kdbus module needs it
353 if(ioctl(transport->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 1) < 0) {
354 _dbus_verbose("memfd sealing failed: %d (%m)\n", errno);
359 item->type = KDBUS_MSG_PAYLOAD_MEMFD;
360 item->size = KDBUS_PART_HEADER_SIZE + sizeof(struct kdbus_memfd);
361 item->memfd.size = ret_size;
362 item->memfd.fd = transport->memfd;
363 // case 2 - small encoded - don't use memfd
365 _dbus_verbose("sending encoded data\n");
366 MSG_ITEM_BUILD_VEC(&transport->encoded_outgoing, _dbus_string_get_length (&transport->encoded_outgoing));
368 // case 3 - small not encoded - don't use memfd
370 _dbus_verbose("sending normal vector data\n");
371 MSG_ITEM_BUILD_VEC(_dbus_string_get_const_data(header), header_size);
375 _dbus_verbose("body attaching\n");
376 item = KDBUS_PART_NEXT(item);
377 MSG_ITEM_BUILD_VEC(_dbus_string_get_const_data(body), body_size);
383 item = KDBUS_PART_NEXT(item);
384 item->type = KDBUS_MSG_FDS;
385 item->size = KDBUS_PART_HEADER_SIZE + (sizeof(int) * fds_count);
386 memcpy(item->fds, unix_fds, sizeof(int) * fds_count);
391 item = KDBUS_PART_NEXT(item);
392 item->type = KDBUS_MSG_DST_NAME;
393 item->size = KDBUS_PART_HEADER_SIZE + strlen(destination) + 1;
394 memcpy(item->str, destination, item->size - KDBUS_PART_HEADER_SIZE);
396 else if (dst_id == KDBUS_DST_ID_BROADCAST)
398 item = KDBUS_PART_NEXT(item);
399 item->type = KDBUS_MSG_BLOOM;
400 item->size = KDBUS_PART_HEADER_SIZE + transport->bloom_size;
401 strncpy(item->data, dbus_message_get_interface(message), transport->bloom_size);
405 if (ioctl(transport->fd, KDBUS_CMD_MSG_SEND, msg))
409 else if(errno == ENXIO) //no such id on the bus
411 if(!reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Name \"%s\" does not exist", dbus_message_get_destination(message), message, transport->base.connection))
414 else if((errno == ESRCH) || (errno = EADDRNOTAVAIL)) //when well known name is not available on the bus
418 if(!reply_with_error(DBUS_ERROR_SERVICE_UNKNOWN, "The name %s was not provided by any .service files", dbus_message_get_destination(message), message, transport->base.connection))
422 if(!reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Name \"%s\" does not exist", dbus_message_get_destination(message), message, transport->base.connection))
425 _dbus_verbose("kdbus error sending message: err %d (%m)\n", errno);
431 close(transport->memfd);
437 * Performs kdbus query of id of the given name
439 * @param name name to query for
441 * @param ownerID place to store id of the name
442 * @return 0 on success, -errno if failed
444 int kdbus_NameQuery(const char* name, DBusTransport* transport, struct nameInfo* pInfo)
446 struct kdbus_cmd_name_info *msg;
447 struct kdbus_item *item;
452 pInfo->sec_label_len = 0;
453 pInfo->sec_label = NULL;
455 item_size = KDBUS_PART_HEADER_SIZE + strlen(name) + 1;
456 item_size = (item_size < 56) ? 56 : item_size; //at least 56 bytes are needed by kernel to place info about name, otherwise error
457 size = sizeof(struct kdbus_cmd_name_info) + item_size;
462 _dbus_verbose("Error allocating memory for: %s,%s\n", _dbus_strerror (errno), _dbus_error_from_errno (errno));
466 memset(msg, 0, size);
468 if((name[0] == ':') && (name[1] == '1') && (name[2] == '.')) /* if name starts with ":1." it is a unique name and should be send as number */
469 msg->id = strtoull(&name[3], NULL, 10);
474 item->type = KDBUS_NAME_INFO_ITEM_NAME;
475 item->size = item_size;
476 memcpy(item->str, name, strlen(name) + 1);
479 ret = ioctl(((DBusTransportSocket*)transport)->fd, KDBUS_CMD_NAME_QUERY, msg);
486 else if(ret == -ENOBUFS)
488 msg = realloc(msg, msg->size); //prepare memory
497 pInfo->uniqueId = msg->id;
498 pInfo->userId = msg->creds.uid;
499 pInfo->processId = msg->creds.pid;
501 while((uint8_t *)(item) < (uint8_t *)(msg) + msg->size)
503 if(item->type == KDBUS_NAME_INFO_ITEM_SECLABEL)
505 pInfo->sec_label_len = item->size - KDBUS_PART_HEADER_SIZE - 1;
506 if(pInfo->sec_label_len != 0)
508 pInfo->sec_label = malloc(pInfo->sec_label_len);
509 if(pInfo->sec_label == NULL)
512 memcpy(pInfo->sec_label, item->data, pInfo->sec_label_len);
516 item = KDBUS_PART_NEXT(item);
525 * Kdbus part of dbus_bus_register.
526 * Shouldn't be used separately because it needs to be surrounded
527 * by other functions as it is done in dbus_bus_register.
529 * @param name place to store unique name given by bus
530 * @param connection the connection
531 * @param error place to store errors
532 * @returns #TRUE on success
534 static dbus_bool_t bus_register_kdbus(char* name, DBusTransportSocket* transportS)
536 struct kdbus_cmd_hello __attribute__ ((__aligned__(8))) hello;
538 hello.conn_flags = KDBUS_HELLO_ACCEPT_FD/* |
539 KDBUS_HELLO_ATTACH_COMM |
540 KDBUS_HELLO_ATTACH_EXE |
541 KDBUS_HELLO_ATTACH_CMDLINE |
542 KDBUS_HELLO_ATTACH_CAPS |
543 KDBUS_HELLO_ATTACH_CGROUP |
544 KDBUS_HELLO_ATTACH_SECLABEL |
545 KDBUS_HELLO_ATTACH_AUDIT*/;
546 hello.size = sizeof(struct kdbus_cmd_hello);
547 hello.pool_size = RECEIVE_POOL_SIZE;
549 if (ioctl(transportS->fd, KDBUS_CMD_HELLO, &hello))
551 _dbus_verbose ("Failed to send hello: %m, %d",errno);
555 sprintf(name, "%llu", (unsigned long long)hello.id);
556 _dbus_verbose("-- Our peer ID is: %s\n", name);
557 transportS->bloom_size = hello.bloom_size;
559 transportS->kdbus_mmap_ptr = mmap(NULL, RECEIVE_POOL_SIZE, PROT_READ, MAP_SHARED, transportS->fd, 0);
560 if (transportS->kdbus_mmap_ptr == MAP_FAILED)
562 _dbus_verbose("Error when mmap: %m, %d",errno);
570 * Seeks key in rule string, and duplicates value of the key into pValue.
571 * If value is "org.freedesktop.DBus" it is indicated by returning -1, because it
572 * needs to be handled in different manner.
573 * Value is duplicated from rule string to newly allocated memory pointe by pValue,
574 * so it must be freed after use.
576 * @param rule rule to look through
577 * @param key key to look for
578 * @param pValue pointer to value of the key found
579 * @return length of the value string, 0 means not found, -1 means "org.freedesktop.DBus"
581 static int parse_match_key(const char *rule, const char* key, char** pValue)
584 const char* pValueEnd;
585 int value_length = 0;
587 pBegin = strstr(rule, key);
590 pBegin += strlen(key);
591 pValueEnd = strchr(pBegin, '\'');
594 value_length = pValueEnd - pBegin;
595 *pValue = strndup(pBegin, value_length);
598 if(strcmp(*pValue, "org.freedesktop.DBus") == 0)
600 _dbus_verbose ("found for key: %s value:'%s'\n", key, *pValue);
608 * Adds a match rule to match broadcast messages going through the message bus.
609 * Do no affect messages addressed directly.
611 * The "rule" argument is the string form of a match rule.
613 * In kdbus function do not blocks.
615 * Upper function returns nothing because of blocking issues
616 * so there is no point to return true or false here.
618 * Only part of the dbus's matching capabilities is implemented in kdbus now, because of different mechanism.
620 * interface match key mapped to bloom
621 * sender match key mapped to src_name
622 * also handled org.freedesktop.dbus members: NameOwnerChanged, NameLost, NameAcquired
624 * @param connection connection to the message bus
625 * @param rule textual form of match rule
626 * @param error location to store any errors - may be NULL
628 dbus_bool_t add_match_kdbus (DBusTransport* transport, __u64 id, const char *rule)
630 struct kdbus_cmd_match* pCmd_match;
631 struct kdbus_item *pItem;
632 __u64 src_id = KDBUS_MATCH_SRC_ID_ANY;
634 unsigned int kernel_item = 0;
637 char* pInterface = NULL;
638 dbus_bool_t ret_value = FALSE;
639 DBusTransportSocket* transportS = (DBusTransportSocket*)transport;
641 /*parsing rule and calculating size of command*/
642 size = sizeof(struct kdbus_cmd_match);
644 if(strstr(rule, "member='NameOwnerChanged'"))
647 size += KDBUS_ITEM_SIZE(1)*3 + KDBUS_ITEM_SIZE(sizeof(__u64))*2; /*std DBus: 3 name related items plus 2 id related items*/
649 else if(strstr(rule, "member='NameChanged'"))
651 kernel_item = KDBUS_MATCH_NAME_CHANGE;
652 size += KDBUS_ITEM_SIZE(1);
654 else if(strstr(rule, "member='NameLost'"))
656 kernel_item = KDBUS_MATCH_NAME_REMOVE;
657 size += KDBUS_ITEM_SIZE(1);
659 else if(strstr(rule, "member='NameAcquired'"))
661 kernel_item = KDBUS_MATCH_NAME_ADD;
662 size += KDBUS_ITEM_SIZE(1);
664 else if(strstr(rule, "member='IdAdded'"))
666 kernel_item = KDBUS_MATCH_ID_ADD;
667 size += KDBUS_ITEM_SIZE(sizeof(__u64));
669 else if(strstr(rule, "member='IdRemoved'"))
671 kernel_item = KDBUS_MATCH_ID_REMOVE;
672 size += KDBUS_ITEM_SIZE(sizeof(__u64));
675 name_size = parse_match_key(rule, "interface='", &pInterface);
676 if((name_size == -1) && (kernel_item == 0)) //means org.freedesktop.DBus without specified member
679 size += KDBUS_ITEM_SIZE(1)*3 + KDBUS_ITEM_SIZE(sizeof(__u64))*2; /* 3 above name related items plus 2 id related items*/
681 else if(name_size > 0) /*actual size is not important for interface because bloom size is defined by bus*/
682 size += KDBUS_PART_HEADER_SIZE + transportS->bloom_size;
684 name_size = parse_match_key(rule, "sender='", &pName);
685 if((name_size == -1) && (kernel_item == 0)) //means org.freedesktop.DBus without specified name - same as interface few line above
688 size += KDBUS_ITEM_SIZE(1)*3 + KDBUS_ITEM_SIZE(sizeof(__u64))*2; /* 3 above name related items plus 2 id related items*/
690 else if(name_size > 0)
692 if(!strncmp(pName, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
694 src_id = strtoull(&pName[3], NULL, 10);
699 size += KDBUS_ITEM_SIZE(name_size + 1); //well known name
702 pCmd_match = alloca(size);
703 if(pCmd_match == NULL)
707 pCmd_match->cookie = id;
708 pCmd_match->size = size;
710 pItem = pCmd_match->items;
711 if(kernel_item == ~0) //all signals from kernel
713 pCmd_match->src_id = 0;
714 pItem->type = KDBUS_MATCH_NAME_CHANGE;
715 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
716 pItem = KDBUS_PART_NEXT(pItem);
717 pItem->type = KDBUS_MATCH_NAME_ADD;
718 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
719 pItem = KDBUS_PART_NEXT(pItem);
720 pItem->type = KDBUS_MATCH_NAME_REMOVE;
721 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
722 pItem = KDBUS_PART_NEXT(pItem);
723 pItem->type = KDBUS_MATCH_ID_ADD;
724 pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
725 pItem = KDBUS_PART_NEXT(pItem);
726 pItem->type = KDBUS_MATCH_ID_REMOVE;
727 pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
729 else if(kernel_item) //only one item
731 pCmd_match->src_id = 0;
732 pItem->type = kernel_item;
733 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
737 pCmd_match->src_id = src_id;
740 pItem->type = KDBUS_MATCH_SRC_NAME;
741 pItem->size = KDBUS_PART_HEADER_SIZE + name_size + 1;
742 memcpy(pItem->str, pName, strlen(pName) + 1);
743 pItem = KDBUS_PART_NEXT(pItem);
748 pItem->type = KDBUS_MATCH_BLOOM;
749 pItem->size = KDBUS_PART_HEADER_SIZE + transportS->bloom_size;
750 strncpy(pItem->data, pInterface, transportS->bloom_size);
754 if(ioctl(transportS->fd, KDBUS_CMD_MATCH_ADD, pCmd_match))
755 _dbus_verbose("Failed adding match bus rule %s,\nerror: %d, %m\n", rule, errno);
758 _dbus_verbose("Added match bus rule %s for id:%llu\n", rule, (unsigned long long)id);
771 * Opposing to dbus, in kdbus removes all match rules with given
772 * cookie, which now is equal to uniqe id.
774 * In kdbus this function will not block
776 * @param connection connection to the message bus
777 * @param error location to store any errors - may be NULL
779 dbus_bool_t remove_match_kdbus (DBusTransport* transport, __u64 id)
781 struct kdbus_cmd_match __attribute__ ((__aligned__(8))) cmd;
782 DBusTransportSocket* transportS = (DBusTransportSocket*) transport;
786 cmd.size = sizeof(struct kdbus_cmd_match);
788 if(ioctl(transportS->fd, KDBUS_CMD_MATCH_REMOVE, &cmd))
790 _dbus_verbose("Failed removing match rule for id: %llu; error: %d, %m\n", (unsigned long long)id, errno);
795 _dbus_verbose("Match rule removed correctly.\n");
801 * Handles messages sent to bus daemon - "org.freedesktop.DBus" and translates them to appropriate
802 * kdbus ioctl commands. Than translate kdbus reply into dbus message and put it into recived messages queue.
804 * !!! Not all methods are handled !!! Doubt if it is even possible.
805 * If method is not handled, returns error reply org.freedesktop.DBus.Error.UnknownMethod
812 * Not handled methods:
813 * - ListActivatableNames
814 * - StartServiceByName
815 * - UpdateActivationEnvironment
816 * - GetConnectionUnixUser
819 static int emulateOrgFreedesktopDBus(DBusTransport *transport, DBusMessage *message)
821 #ifdef DBUS_SERVICES_IN_LIB
823 struct nameInfo info;
827 if(!strcmp(dbus_message_get_member(message), "Hello"))
832 name = malloc(snprintf(name, 0, "%llu", ULLONG_MAX) + 1);
835 if(!bus_register_kdbus(name, (DBusTransportSocket*)transport))
837 if(!register_kdbus_policy(name, ((DBusTransportSocket*)transport)->fd))
840 sender = malloc (strlen(name) + 4);
843 sprintf(sender, ":1.%s", name);
844 ((DBusTransportSocket*)transport)->sender = sender;
846 if(!reply_1_data(message, DBUS_TYPE_STRING, &name, transport->connection))
847 return 0; //todo why we cannot free name after sending reply, shouldn't we?
854 #ifdef DBUS_SERVICES_IN_LIB
855 else if(!strcmp(dbus_message_get_member(message), "RequestName"))
861 if(!dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_UINT32, &flags, DBUS_TYPE_INVALID))
864 if(!register_kdbus_policy(name, ((DBusTransportSocket*)transport)->fd))
867 result = request_kdbus_name(((DBusTransportSocket*)transport)->fd, name, flags, 0);
869 return reply_with_error(DBUS_ERROR_ACCESS_DENIED,
870 "Connection is not allowed to own the service \"%s\" due to security policies in the configuration file",
871 name, message, transport->connection);
873 return reply_with_error(DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", name, message, transport->connection);
875 return reply_1_data(message, DBUS_TYPE_UINT32, &result, transport->connection);
877 else if(!strcmp(dbus_message_get_member(message), "AddMatch"))
881 if(!dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &rule, DBUS_TYPE_INVALID))
884 if(!add_match_kdbus(transport, 0, rule))
887 return reply_ack(message,transport->connection);
889 else if(!strcmp(dbus_message_get_member(message), "RemoveMatch"))
891 if(!remove_match_kdbus(transport, 0))
893 return reply_ack(message, transport->connection);
895 else if(!strcmp(dbus_message_get_member(message), "GetNameOwner")) //returns id of the well known name
899 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
900 inter_ret = kdbus_NameQuery(name, transport, &info);
901 if(inter_ret == 0) //unique id of the name
903 char unique_name[(unsigned int)(snprintf(name, 0, "%llu", ULLONG_MAX) + sizeof(":1."))];
904 const char* pString = unique_name;
906 sprintf(unique_name, ":1.%llu", (unsigned long long int)info.uniqueId);
907 _dbus_verbose("Unique name discovered:%s\n", unique_name);
908 ret_value = reply_1_data(message, DBUS_TYPE_STRING, &pString, transport->connection);
910 else if(inter_ret == -ENOENT) //name has no owner
911 return reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Could not get owner of name '%s': no such name", name, message, transport->connection);
914 _dbus_verbose("kdbus error sending name query: err %d (%m)\n", errno);
915 ret_value = reply_with_error(DBUS_ERROR_FAILED, "Could not determine unique name for '%s'", name, message, transport->connection);
918 else if(!strcmp(dbus_message_get_member(message), "NameHasOwner")) //returns if name is currently registered on the bus
923 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
924 inter_ret = kdbus_NameQuery(name, transport, &info);
925 if((inter_ret == 0) || (inter_ret == -ENOENT))
927 result = (inter_ret == 0) ? TRUE : FALSE;
928 ret_value = reply_1_data(message, DBUS_TYPE_BOOLEAN, &result, transport->connection);
932 _dbus_verbose("kdbus error checking if name exists: err %d (%m)\n", errno);
933 ret_value = reply_with_error(DBUS_ERROR_FAILED, "Could not determine whether name '%s' exists", name, message, transport->connection);
936 else if(!strcmp(dbus_message_get_member(message), "GetConnectionUnixUser"))
940 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
941 inter_ret = kdbus_NameQuery(name, transport, &info);
942 if(inter_ret == 0) //name found
944 _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
945 ret_value = reply_1_data(message, DBUS_TYPE_UINT32, &info.userId, transport->connection);
947 else if(inter_ret == -ENOENT) //name has no owner
948 return reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Could not get UID of name '%s': no such name", name, message, transport->connection);
951 _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
952 ret_value = reply_with_error(DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name, message, transport->connection);
955 else if(!strcmp(dbus_message_get_member(message), "GetConnectionUnixProcessID"))
959 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
960 inter_ret = kdbus_NameQuery(name, transport, &info);
961 if(inter_ret == 0) //name found
962 ret_value = reply_1_data(message, DBUS_TYPE_UINT32, &info.processId, transport->connection);
963 else if(inter_ret == -ENOENT) //name has no owner
964 return reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Could not get PID of name '%s': no such name", name, message, transport->connection);
967 _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
968 ret_value = reply_with_error(DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN,"Could not determine PID for '%s'", name, message, transport->connection);
971 else if(!strcmp(dbus_message_get_member(message), "ListNames")) //return all well known names on he bus
973 struct kdbus_cmd_names* pCmd;
976 cmd_size = sizeof(struct kdbus_cmd_names) + KDBUS_ITEM_SIZE(1);
977 pCmd = malloc(cmd_size);
980 pCmd->size = cmd_size;
984 if(ioctl(((DBusTransportSocket*)transport)->fd, KDBUS_CMD_NAME_LIST, pCmd))
988 if(errno == ENOBUFS) //buffer to small to put all names into it
989 cmd_size = pCmd->size; //here kernel tells how much memory it needs
992 _dbus_verbose("kdbus error asking for name list: err %d (%m)\n",errno);
996 if(cmd_size) //kernel needs more memory
998 pCmd = realloc(pCmd, cmd_size); //prepare memory
1001 goto again; //and try again
1006 DBusMessageIter iter, sub;
1007 struct kdbus_cmd_name* pCmd_name;
1010 reply = dbus_message_new_method_return(message);
1013 dbus_message_set_sender(reply, DBUS_SERVICE_DBUS);
1014 dbus_message_iter_init_append(reply, &iter);
1015 if (!dbus_message_iter_open_container (&iter, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING_AS_STRING, &sub))
1017 dbus_message_unref(reply);
1020 for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
1022 pName = pCmd_name->name;
1023 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &pName))
1025 dbus_message_unref(reply);
1030 if (!dbus_message_iter_close_container (&iter, &sub))
1032 dbus_message_unref (reply);
1036 if(add_message_to_received(reply, transport->connection))
1044 else if(!strcmp(dbus_message_get_member(message), "GetId"))
1047 char uuid[DBUS_UUID_LENGTH_BYTES];
1050 DBusString binary, encoded;
1052 path = &transport->address[11]; //start of kdbus bus path
1053 if(stat(path, &stats) < -1)
1055 _dbus_verbose("kdbus error reading stats of bus: err %d (%m)\n", errno);
1056 return reply_with_error(DBUS_ERROR_FAILED, "Could not determine bus '%s' uuid", path, message, transport->connection);
1060 MD5_Update(&md5, path, strlen(path));
1061 MD5_Update(&md5, &stats.st_ctim.tv_sec, sizeof(stats.st_ctim.tv_sec));
1062 MD5_Final(uuid, &md5);
1064 if(!_dbus_string_init (&encoded))
1066 _dbus_string_init_const_len (&binary, uuid, DBUS_UUID_LENGTH_BYTES);
1067 if(!_dbus_string_hex_encode (&binary, 0, &encoded, _dbus_string_get_length (&encoded)))
1069 path = (char*)_dbus_string_get_const_data (&encoded);
1070 ret_value = reply_1_data(message, DBUS_TYPE_STRING, &path, transport->connection);
1073 _dbus_string_free(&binary);
1074 _dbus_string_free(&encoded);
1079 /* else if(!strcmp(dbus_message_get_member(message), "GetAdtAuditSessionData")) //todo to be implemented if needed and possible
1083 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
1084 return reply_with_error(DBUS_ERROR_ADT_AUDIT_DATA_UNKNOWN, "Could not determine audit session data for '%s'", name, message, transport->connection);
1086 #ifdef DBUS_SERVICES_IN_LIB
1087 else if(!strcmp(dbus_message_get_member(message), "GetConnectionSELinuxSecurityContext"))
1091 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
1092 inter_ret = kdbus_NameQuery(name, transport, &info);
1093 if(inter_ret == -ENOENT) //name has no owner
1094 return reply_with_error(DBUS_ERROR_NAME_HAS_NO_OWNER, "Could not get security context of name '%s': no such name", name, message, transport->connection);
1095 else if(inter_ret < 0)
1096 return reply_with_error(DBUS_ERROR_SELINUX_SECURITY_CONTEXT_UNKNOWN, "Could not determine security context for '%s'", name, message, transport->connection);
1101 reply = dbus_message_new_method_return(message);
1104 dbus_message_set_sender(reply, DBUS_SERVICE_DBUS);
1105 if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
1106 dbus_message_unref(reply);
1107 else if(add_message_to_received(reply, transport->connection))
1114 return 1; //send to daemon
1116 #ifdef DBUS_SERVICES_IN_LIB
1118 free(info.sec_label);
1123 #if KDBUS_MSG_DECODE_DEBUG == 1
1124 static char *msg_id(uint64_t id, char *buf)
1130 sprintf(buf, "%llu", (unsigned long long)id);
1134 struct kdbus_enum_table {
1138 #define _STRINGIFY(x) #x
1139 #define STRINGIFY(x) _STRINGIFY(x)
1140 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
1141 #define TABLE(what) static struct kdbus_enum_table kdbus_table_##what[]
1142 #define ENUM(_id) { .id=_id, .name=STRINGIFY(_id) }
1143 #define LOOKUP(what) \
1144 const char *enum_##what(long long id) { \
1146 for (i = 0; i < ELEMENTSOF(kdbus_table_##what); i++) \
1147 if (id == kdbus_table_##what[i].id) \
1148 return kdbus_table_##what[i].name; \
1151 const char *enum_MSG(long long id);
1153 ENUM(_KDBUS_MSG_NULL),
1154 ENUM(KDBUS_MSG_PAYLOAD_VEC),
1155 ENUM(KDBUS_MSG_PAYLOAD_OFF),
1156 ENUM(KDBUS_MSG_PAYLOAD_MEMFD),
1157 ENUM(KDBUS_MSG_FDS),
1158 ENUM(KDBUS_MSG_BLOOM),
1159 ENUM(KDBUS_MSG_DST_NAME),
1160 ENUM(KDBUS_MSG_SRC_CREDS),
1161 ENUM(KDBUS_MSG_SRC_PID_COMM),
1162 ENUM(KDBUS_MSG_SRC_TID_COMM),
1163 ENUM(KDBUS_MSG_SRC_EXE),
1164 ENUM(KDBUS_MSG_SRC_CMDLINE),
1165 ENUM(KDBUS_MSG_SRC_CGROUP),
1166 ENUM(KDBUS_MSG_SRC_CAPS),
1167 ENUM(KDBUS_MSG_SRC_SECLABEL),
1168 ENUM(KDBUS_MSG_SRC_AUDIT),
1169 ENUM(KDBUS_MSG_SRC_NAMES),
1170 ENUM(KDBUS_MSG_TIMESTAMP),
1171 ENUM(KDBUS_MSG_NAME_ADD),
1172 ENUM(KDBUS_MSG_NAME_REMOVE),
1173 ENUM(KDBUS_MSG_NAME_CHANGE),
1174 ENUM(KDBUS_MSG_ID_ADD),
1175 ENUM(KDBUS_MSG_ID_REMOVE),
1176 ENUM(KDBUS_MSG_REPLY_TIMEOUT),
1177 ENUM(KDBUS_MSG_REPLY_DEAD),
1180 const char *enum_PAYLOAD(long long id);
1182 ENUM(KDBUS_PAYLOAD_KERNEL),
1183 ENUM(KDBUS_PAYLOAD_DBUS1),
1184 ENUM(KDBUS_PAYLOAD_GVARIANT),
1189 * Puts locally generated message into received data buffer.
1190 * Use only during receiving phase!
1192 * @param message message to load
1193 * @param data place to load message
1194 * @return size of message
1196 static int put_message_into_data(DBusMessage *message, char* data)
1199 const DBusString *header;
1200 const DBusString *body;
1203 dbus_message_set_serial(message, 1);
1204 dbus_message_lock (message);
1205 _dbus_message_get_network_data (message, &header, &body);
1206 ret_size = _dbus_string_get_length(header);
1207 memcpy(data, _dbus_string_get_const_data(header), ret_size);
1209 size = _dbus_string_get_length(body);
1210 memcpy(data, _dbus_string_get_const_data(body), size);
1216 * Decodes kdbus message in order to extract dbus message and put it into data and fds.
1217 * Also captures and decodes kdbus error messages and kdbus kernel broadcasts and converts
1218 * all of them into dbus messages.
1220 * @param msg kdbus message
1221 * @param data place to copy dbus message to
1222 * @param socket_transport transport
1223 * @param fds place to store file descriptors received
1224 * @param n_fds place to store quantity of file descriptor
1225 * @return number of dbus message's bytes received or -1 on error
1227 static int kdbus_decode_msg(const struct kdbus_msg* msg, char *data, DBusTransportSocket* socket_transport, int* fds, int* n_fds)
1229 const struct kdbus_item *item;
1231 DBusMessage *message = NULL;
1232 DBusMessageIter args;
1233 const char* emptyString = "";
1234 const char* pString = NULL;
1235 char dbus_name[(unsigned int)(snprintf((char*)pString, 0, "%llu", ULLONG_MAX) + sizeof(":1."))];
1236 const char* pDBusName = dbus_name;
1237 #if KDBUS_MSG_DECODE_DEBUG == 1
1241 #if KDBUS_MSG_DECODE_DEBUG == 1
1242 _dbus_verbose("MESSAGE: %s (%llu bytes) flags=0x%llx, %s → %s, cookie=%llu, timeout=%llu\n",
1243 enum_PAYLOAD(msg->payload_type), (unsigned long long) msg->size,
1244 (unsigned long long) msg->flags,
1245 msg_id(msg->src_id, buf), msg_id(msg->dst_id, buf),
1246 (unsigned long long) msg->cookie, (unsigned long long) msg->timeout_ns);
1251 KDBUS_PART_FOREACH(item, msg, items)
1253 if (item->size <= KDBUS_PART_HEADER_SIZE)
1255 _dbus_verbose(" +%s (%llu bytes) invalid data record\n", enum_MSG(item->type), item->size);
1256 break; //??? continue (because dbus will find error) or break
1261 case KDBUS_MSG_PAYLOAD_OFF:
1262 memcpy(data, (char *)socket_transport->kdbus_mmap_ptr + item->vec.offset, item->vec.size);
1263 data += item->vec.size;
1264 ret_size += item->vec.size;
1266 _dbus_verbose(" +%s (%llu bytes) off=%llu size=%llu\n",
1267 enum_MSG(item->type), item->size,
1268 (unsigned long long)item->vec.offset,
1269 (unsigned long long)item->vec.size);
1272 case KDBUS_MSG_PAYLOAD_MEMFD:
1277 size = item->memfd.size;
1278 _dbus_verbose("memfd.size : %llu\n", (unsigned long long)size);
1280 buf = mmap(NULL, size, PROT_READ , MAP_SHARED, item->memfd.fd, 0);
1281 if (buf == MAP_FAILED)
1283 _dbus_verbose("mmap() fd=%i failed:%m", item->memfd.fd);
1287 memcpy(data, buf, size);
1293 _dbus_verbose(" +%s (%llu bytes) off=%llu size=%llu\n",
1294 enum_MSG(item->type), item->size,
1295 (unsigned long long)item->vec.offset,
1296 (unsigned long long)item->vec.size);
1304 *n_fds = (item->size - KDBUS_PART_HEADER_SIZE) / sizeof(int);
1305 memcpy(fds, item->fds, *n_fds * sizeof(int));
1306 for (i = 0; i < *n_fds; i++)
1307 _dbus_fd_set_close_on_exec(fds[i]);
1311 #if KDBUS_MSG_DECODE_DEBUG == 1
1312 case KDBUS_MSG_SRC_CREDS:
1313 _dbus_verbose(" +%s (%llu bytes) uid=%lld, gid=%lld, pid=%lld, tid=%lld, starttime=%lld\n",
1314 enum_MSG(item->type), item->size,
1315 item->creds.uid, item->creds.gid,
1316 item->creds.pid, item->creds.tid,
1317 item->creds.starttime);
1320 case KDBUS_MSG_SRC_PID_COMM:
1321 case KDBUS_MSG_SRC_TID_COMM:
1322 case KDBUS_MSG_SRC_EXE:
1323 case KDBUS_MSG_SRC_CGROUP:
1324 case KDBUS_MSG_SRC_SECLABEL:
1325 case KDBUS_MSG_DST_NAME:
1326 _dbus_verbose(" +%s (%llu bytes) '%s' (%zu)\n",
1327 enum_MSG(item->type), item->size, item->str, strlen(item->str));
1330 case KDBUS_MSG_SRC_CMDLINE:
1331 case KDBUS_MSG_SRC_NAMES: {
1332 __u64 size = item->size - KDBUS_PART_HEADER_SIZE;
1333 const char *str = item->str;
1336 _dbus_verbose(" +%s (%llu bytes) ", enum_MSG(item->type), item->size);
1338 _dbus_verbose("'%s' ", str);
1339 size -= strlen(str) + 1;
1340 str += strlen(str) + 1;
1344 _dbus_verbose("(%d string%s)\n", count, (count == 1) ? "" : "s");
1348 case KDBUS_MSG_SRC_AUDIT:
1349 _dbus_verbose(" +%s (%llu bytes) loginuid=%llu sessionid=%llu\n",
1350 enum_MSG(item->type), item->size,
1351 (unsigned long long)item->data64[0],
1352 (unsigned long long)item->data64[1]);
1355 case KDBUS_MSG_SRC_CAPS: {
1357 const uint32_t *cap;
1360 _dbus_verbose(" +%s (%llu bytes) len=%llu bytes)\n",
1361 enum_MSG(item->type), item->size,
1362 (unsigned long long)item->size - KDBUS_PART_HEADER_SIZE);
1365 n = (item->size - KDBUS_PART_HEADER_SIZE) / 4 / sizeof(uint32_t);
1367 _dbus_verbose(" CapInh=");
1368 for (i = 0; i < n; i++)
1369 _dbus_verbose("%08x", cap[(0 * n) + (n - i - 1)]);
1371 _dbus_verbose(" CapPrm=");
1372 for (i = 0; i < n; i++)
1373 _dbus_verbose("%08x", cap[(1 * n) + (n - i - 1)]);
1375 _dbus_verbose(" CapEff=");
1376 for (i = 0; i < n; i++)
1377 _dbus_verbose("%08x", cap[(2 * n) + (n - i - 1)]);
1379 _dbus_verbose(" CapInh=");
1380 for (i = 0; i < n; i++)
1381 _dbus_verbose("%08x", cap[(3 * n) + (n - i - 1)]);
1382 _dbus_verbose("\n");
1386 case KDBUS_MSG_TIMESTAMP:
1387 _dbus_verbose(" +%s (%llu bytes) realtime=%lluns monotonic=%lluns\n",
1388 enum_MSG(item->type), item->size,
1389 (unsigned long long)item->timestamp.realtime_ns,
1390 (unsigned long long)item->timestamp.monotonic_ns);
1394 case KDBUS_MSG_REPLY_TIMEOUT:
1395 _dbus_verbose(" +%s (%llu bytes) cookie=%llu\n",
1396 enum_MSG(item->type), item->size, msg->cookie_reply);
1398 message = generate_local_error_message(msg->cookie_reply, DBUS_ERROR_NO_REPLY, NULL);
1405 ret_size = put_message_into_data(message, data);
1408 case KDBUS_MSG_REPLY_DEAD:
1409 _dbus_verbose(" +%s (%llu bytes) cookie=%llu\n",
1410 enum_MSG(item->type), item->size, msg->cookie_reply);
1412 message = generate_local_error_message(msg->cookie_reply, DBUS_ERROR_NAME_HAS_NO_OWNER, NULL);
1419 ret_size = put_message_into_data(message, data);
1422 case KDBUS_MSG_NAME_ADD:
1423 _dbus_verbose(" +%s (%llu bytes) '%s', old id=%lld, new id=%lld, flags=0x%llx\n",
1424 enum_MSG(item->type), (unsigned long long) item->size,
1425 item->name_change.name, item->name_change.old_id,
1426 item->name_change.new_id, item->name_change.flags);
1428 message = dbus_message_new_signal(DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged");
1435 sprintf(dbus_name,":1.%llu",item->name_change.new_id);
1436 pString = item->name_change.name;
1437 _dbus_verbose ("Name added: %s\n", pString);
1438 dbus_message_iter_init_append(message, &args);
1439 ITER_APPEND_STR(pString)
1440 ITER_APPEND_STR(emptyString)
1441 ITER_APPEND_STR(pDBusName)
1442 dbus_message_set_sender(message, DBUS_SERVICE_DBUS);
1444 ret_size = put_message_into_data(message, data);
1447 case KDBUS_MSG_NAME_REMOVE:
1448 _dbus_verbose(" +%s (%llu bytes) '%s', old id=%lld, new id=%lld, flags=0x%llx\n",
1449 enum_MSG(item->type), (unsigned long long) item->size,
1450 item->name_change.name, item->name_change.old_id,
1451 item->name_change.new_id, item->name_change.flags);
1453 message = dbus_message_new_signal(DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged"); // name of the signal
1460 sprintf(dbus_name,":1.%llu",item->name_change.old_id);
1461 pString = item->name_change.name;
1462 _dbus_verbose ("Name removed: %s\n", pString);
1463 dbus_message_iter_init_append(message, &args);
1464 ITER_APPEND_STR(pString)
1465 ITER_APPEND_STR(pDBusName)
1466 ITER_APPEND_STR(emptyString)
1467 dbus_message_set_sender(message, DBUS_SERVICE_DBUS);
1469 ret_size = put_message_into_data(message, data);
1472 case KDBUS_MSG_NAME_CHANGE:
1473 _dbus_verbose(" +%s (%llu bytes) '%s', old id=%lld, new id=%lld, flags=0x%llx\n",
1474 enum_MSG(item->type), (unsigned long long) item->size,
1475 item->name_change.name, item->name_change.old_id,
1476 item->name_change.new_id, item->name_change.flags);
1478 message = dbus_message_new_signal(DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged");
1485 sprintf(dbus_name,":1.%llu",item->name_change.old_id);
1486 pString = item->name_change.name;
1487 _dbus_verbose ("Name changed: %s\n", pString);
1488 dbus_message_iter_init_append(message, &args);
1489 ITER_APPEND_STR(pString)
1490 ITER_APPEND_STR(pDBusName)
1491 sprintf(&dbus_name[3],"%llu",item->name_change.new_id);
1492 _dbus_verbose ("New id: %s\n", pDBusName);
1493 ITER_APPEND_STR(pDBusName)
1494 dbus_message_set_sender(message, DBUS_SERVICE_DBUS);
1496 ret_size = put_message_into_data(message, data);
1499 case KDBUS_MSG_ID_ADD:
1500 _dbus_verbose(" +%s (%llu bytes) id=%llu flags=%llu\n",
1501 enum_MSG(item->type), (unsigned long long) item->size,
1502 (unsigned long long) item->id_change.id,
1503 (unsigned long long) item->id_change.flags);
1505 message = dbus_message_new_signal(DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged");
1512 sprintf(dbus_name,":1.%llu",item->id_change.id);
1513 dbus_message_iter_init_append(message, &args);
1514 ITER_APPEND_STR(pDBusName)
1515 ITER_APPEND_STR(emptyString)
1516 ITER_APPEND_STR(pDBusName)
1517 dbus_message_set_sender(message, DBUS_SERVICE_DBUS);
1519 ret_size = put_message_into_data(message, data);
1522 case KDBUS_MSG_ID_REMOVE:
1523 _dbus_verbose(" +%s (%llu bytes) id=%llu flags=%llu\n",
1524 enum_MSG(item->type), (unsigned long long) item->size,
1525 (unsigned long long) item->id_change.id,
1526 (unsigned long long) item->id_change.flags);
1528 message = dbus_message_new_signal(DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameOwnerChanged");
1535 sprintf(dbus_name,":1.%llu",item->id_change.id);
1536 dbus_message_iter_init_append(message, &args);
1537 ITER_APPEND_STR(pDBusName)
1538 ITER_APPEND_STR(pDBusName)
1539 ITER_APPEND_STR(emptyString)
1540 dbus_message_set_sender(message, DBUS_SERVICE_DBUS);
1542 ret_size = put_message_into_data(message, data);
1544 #if KDBUS_MSG_DECODE_DEBUG == 1
1546 _dbus_verbose(" +%s (%llu bytes)\n", enum_MSG(item->type), item->size);
1552 #if KDBUS_MSG_DECODE_DEBUG == 1
1554 if ((char *)item - ((char *)msg + msg->size) >= 8)
1555 _dbus_verbose("invalid padding at end of message\n");
1560 dbus_message_unref(message);
1565 * Reads message from kdbus and puts it into dbus buffer and fds
1567 * @param transport transport
1568 * @param buffer place to copy received message to
1569 * @param fds place to store file descriptors sent in the message
1570 * @param n_fds place to store number of file descriptors
1571 * @return size of received message on success, -1 on error
1573 static int kdbus_read_message(DBusTransportSocket *socket_transport, DBusString *buffer, int* fds, int* n_fds)
1576 uint64_t __attribute__ ((__aligned__(8))) offset;
1577 struct kdbus_msg *msg;
1581 start = _dbus_string_get_length (buffer);
1582 if (!_dbus_string_lengthen (buffer, socket_transport->max_bytes_read_per_iteration))
1587 data = _dbus_string_get_data_len (buffer, start, socket_transport->max_bytes_read_per_iteration);
1590 if (ioctl(socket_transport->fd, KDBUS_CMD_MSG_RECV, &offset) < 0)
1594 _dbus_verbose("kdbus error receiving message: %d (%m)\n", errno);
1595 _dbus_string_set_length (buffer, start);
1599 msg = (struct kdbus_msg *)((char*)socket_transport->kdbus_mmap_ptr + offset);
1601 ret_size = kdbus_decode_msg(msg, data, socket_transport, fds, n_fds);
1603 if(ret_size == -1) /* error */
1605 _dbus_string_set_length (buffer, start);
1609 _dbus_string_set_length (buffer, start + ret_size);
1613 if (ioctl(socket_transport->fd, KDBUS_CMD_MSG_RELEASE, &offset) < 0)
1617 _dbus_verbose("kdbus error freeing message: %d (%m)\n", errno);
1625 free_watches (DBusTransport *transport)
1627 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1629 _dbus_verbose ("start\n");
1631 if (socket_transport->read_watch)
1633 if (transport->connection)
1634 _dbus_connection_remove_watch_unlocked (transport->connection,
1635 socket_transport->read_watch);
1636 _dbus_watch_invalidate (socket_transport->read_watch);
1637 _dbus_watch_unref (socket_transport->read_watch);
1638 socket_transport->read_watch = NULL;
1641 if (socket_transport->write_watch)
1643 if (transport->connection)
1644 _dbus_connection_remove_watch_unlocked (transport->connection,
1645 socket_transport->write_watch);
1646 _dbus_watch_invalidate (socket_transport->write_watch);
1647 _dbus_watch_unref (socket_transport->write_watch);
1648 socket_transport->write_watch = NULL;
1651 _dbus_verbose ("end\n");
1655 socket_finalize (DBusTransport *transport)
1657 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1659 _dbus_verbose ("\n");
1661 free_watches (transport);
1663 _dbus_string_free (&socket_transport->encoded_outgoing);
1664 _dbus_string_free (&socket_transport->encoded_incoming);
1666 _dbus_transport_finalize_base (transport);
1668 _dbus_assert (socket_transport->read_watch == NULL);
1669 _dbus_assert (socket_transport->write_watch == NULL);
1671 dbus_free (transport);
1675 check_write_watch (DBusTransport *transport)
1677 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1680 if (transport->connection == NULL)
1683 if (transport->disconnected)
1685 _dbus_assert (socket_transport->write_watch == NULL);
1689 _dbus_transport_ref (transport);
1691 #ifdef DBUS_AUTHENTICATION
1692 if (_dbus_transport_try_to_authenticate (transport))
1694 needed = _dbus_connection_has_messages_to_send_unlocked (transport->connection);
1695 #ifdef DBUS_AUTHENTICATION
1698 if (transport->send_credentials_pending)
1702 DBusAuthState auth_state;
1704 auth_state = _dbus_auth_do_work (transport->auth);
1706 /* If we need memory we install the write watch just in case,
1707 * if there's no need for it, it will get de-installed
1708 * next time we try reading.
1710 if (auth_state == DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND ||
1711 auth_state == DBUS_AUTH_STATE_WAITING_FOR_MEMORY)
1718 _dbus_verbose ("check_write_watch(): needed = %d on connection %p watch %p fd = %d outgoing messages exist %d\n",
1719 needed, transport->connection, socket_transport->write_watch,
1720 socket_transport->fd,
1721 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
1723 _dbus_connection_toggle_watch_unlocked (transport->connection,
1724 socket_transport->write_watch,
1727 _dbus_transport_unref (transport);
1731 check_read_watch (DBusTransport *transport)
1733 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1734 dbus_bool_t need_read_watch;
1736 _dbus_verbose ("fd = %d\n",socket_transport->fd);
1738 if (transport->connection == NULL)
1741 if (transport->disconnected)
1743 _dbus_assert (socket_transport->read_watch == NULL);
1747 _dbus_transport_ref (transport);
1749 #ifdef DBUS_AUTHENTICATION
1750 if (_dbus_transport_try_to_authenticate (transport))
1753 (_dbus_counter_get_size_value (transport->live_messages) < transport->max_live_messages_size) &&
1754 (_dbus_counter_get_unix_fd_value (transport->live_messages) < transport->max_live_messages_unix_fds);
1755 #ifdef DBUS_AUTHENTICATION
1758 if (transport->receive_credentials_pending)
1759 need_read_watch = TRUE;
1762 /* The reason to disable need_read_watch when not WAITING_FOR_INPUT
1763 * is to avoid spinning on the file descriptor when we're waiting
1764 * to write or for some other part of the auth process
1766 DBusAuthState auth_state;
1768 auth_state = _dbus_auth_do_work (transport->auth);
1770 /* If we need memory we install the read watch just in case,
1771 * if there's no need for it, it will get de-installed
1772 * next time we try reading. If we're authenticated we
1773 * install it since we normally have it installed while
1776 if (auth_state == DBUS_AUTH_STATE_WAITING_FOR_INPUT ||
1777 auth_state == DBUS_AUTH_STATE_WAITING_FOR_MEMORY ||
1778 auth_state == DBUS_AUTH_STATE_AUTHENTICATED)
1779 need_read_watch = TRUE;
1781 need_read_watch = FALSE;
1786 _dbus_verbose (" setting read watch enabled = %d\n", need_read_watch);
1787 _dbus_connection_toggle_watch_unlocked (transport->connection,
1788 socket_transport->read_watch,
1791 _dbus_transport_unref (transport);
1795 do_io_error (DBusTransport *transport)
1797 _dbus_transport_ref (transport);
1798 _dbus_transport_disconnect (transport);
1799 _dbus_transport_unref (transport);
1802 #ifdef DBUS_AUTHENTICATION
1803 /* return value is whether we successfully read any new data. */
1805 read_data_into_auth (DBusTransport *transport,
1808 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1815 _dbus_auth_get_buffer (transport->auth, &buffer);
1817 bytes_read = kdbus_read_message(socket_transport, buffer, fds, &n_fds);
1819 _dbus_auth_return_buffer (transport->auth, buffer,
1820 bytes_read > 0 ? bytes_read : 0);
1824 _dbus_verbose (" read %d bytes in auth phase\n", bytes_read);
1827 else if (bytes_read < 0)
1829 /* EINTR already handled for us */
1831 if (_dbus_get_is_errno_enomem ())
1835 else if (_dbus_get_is_errno_eagain_or_ewouldblock ())
1836 ; /* do nothing, just return FALSE below */
1839 _dbus_verbose ("Error reading from remote app: %s\n",
1840 _dbus_strerror_from_errno ());
1841 do_io_error (transport);
1848 _dbus_assert (bytes_read == 0);
1850 _dbus_verbose ("Disconnected from remote app\n");
1851 do_io_error (transport);
1857 static int kdbus_send_auth (DBusTransport *transport, const DBusString *buffer)
1860 int bytes_written = -1;
1861 struct kdbus_msg *msg;
1862 struct kdbus_item *item;
1864 len = _dbus_string_get_length (buffer);
1865 // data = _dbus_string_get_const_data_len (buffer, 0, len);
1867 msg = kdbus_init_msg(NULL, 1, 0, FALSE, 0, (DBusTransportSocket*)transport);
1869 MSG_ITEM_BUILD_VEC(_dbus_string_get_const_data_len (buffer, 0, len), len);
1872 if(ioctl(((DBusTransportSocket*)transport)->fd, KDBUS_CMD_MSG_SEND, msg))
1876 _dbus_verbose ("Error writing auth: %d, %m\n", errno);
1879 bytes_written = len;
1881 return bytes_written;
1884 /* Return value is whether we successfully wrote any bytes */
1886 write_data_from_auth (DBusTransport *transport)
1888 // DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1890 const DBusString *buffer;
1892 if (!_dbus_auth_get_bytes_to_send (transport->auth,
1896 bytes_written = kdbus_send_auth (transport, buffer);
1898 if (bytes_written > 0)
1900 _dbus_auth_bytes_sent (transport->auth, bytes_written);
1903 else if (bytes_written < 0)
1905 /* EINTR already handled for us */
1907 if (_dbus_get_is_errno_eagain_or_ewouldblock ())
1911 _dbus_verbose ("Error writing to remote app: %s\n",
1912 _dbus_strerror_from_errno ());
1913 do_io_error (transport);
1922 exchange_credentials (DBusTransport *transport,
1923 dbus_bool_t do_reading,
1924 dbus_bool_t do_writing)
1926 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
1927 DBusError error = DBUS_ERROR_INIT;
1929 _dbus_verbose ("exchange_credentials: do_reading = %d, do_writing = %d\n",
1930 do_reading, do_writing);
1932 if (do_writing && transport->send_credentials_pending)
1934 if (_dbus_send_credentials_socket (socket_transport->fd,
1937 transport->send_credentials_pending = FALSE;
1941 _dbus_verbose ("Failed to write credentials: %s\n", error.message);
1942 dbus_error_free (&error);
1943 do_io_error (transport);
1947 if (do_reading && transport->receive_credentials_pending)
1949 /* FIXME this can fail due to IO error _or_ OOM, broken
1950 * (somewhat tricky to fix since the OOM error can be set after
1951 * we already read the credentials byte, so basically we need to
1952 * separate reading the byte and storing it in the
1953 * transport->credentials). Does not really matter for now
1954 * because storing in credentials never actually fails on unix.
1956 if (_dbus_read_credentials_socket (socket_transport->fd,
1957 transport->credentials,
1960 transport->receive_credentials_pending = FALSE;
1964 _dbus_verbose ("Failed to read credentials %s\n", error.message);
1965 dbus_error_free (&error);
1966 do_io_error (transport);
1970 if (!(transport->send_credentials_pending ||
1971 transport->receive_credentials_pending))
1973 if (!_dbus_auth_set_credentials (transport->auth,
1974 transport->credentials))
1982 do_authentication (DBusTransport *transport,
1983 dbus_bool_t do_reading,
1984 dbus_bool_t do_writing,
1985 dbus_bool_t *auth_completed)
1988 dbus_bool_t orig_auth_state;
1992 orig_auth_state = _dbus_transport_try_to_authenticate (transport);
1994 /* This is essential to avoid the check_write_watch() at the end,
1995 * we don't want to add a write watch in do_iteration before
1996 * we try writing and get EAGAIN
1998 if (orig_auth_state)
2001 *auth_completed = FALSE;
2005 _dbus_transport_ref (transport);
2007 while (!_dbus_transport_try_to_authenticate (transport) &&
2008 _dbus_transport_get_is_connected (transport))
2010 if (!exchange_credentials (transport, do_reading, do_writing))
2016 if (transport->send_credentials_pending ||
2017 transport->receive_credentials_pending)
2019 _dbus_verbose ("send_credentials_pending = %d receive_credentials_pending = %d\n",
2020 transport->send_credentials_pending,
2021 transport->receive_credentials_pending);
2025 #define TRANSPORT_SIDE(t) ((t)->is_server ? "server" : "client")
2026 switch (_dbus_auth_do_work (transport->auth))
2028 case DBUS_AUTH_STATE_WAITING_FOR_INPUT:
2029 _dbus_verbose (" %s auth state: waiting for input\n",
2030 TRANSPORT_SIDE (transport));
2031 if (!do_reading || !read_data_into_auth (transport, &oom))
2035 case DBUS_AUTH_STATE_WAITING_FOR_MEMORY:
2036 _dbus_verbose (" %s auth state: waiting for memory\n",
2037 TRANSPORT_SIDE (transport));
2042 case DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND:
2043 _dbus_verbose (" %s auth state: bytes to send\n",
2044 TRANSPORT_SIDE (transport));
2045 if (!do_writing || !write_data_from_auth (transport))
2049 case DBUS_AUTH_STATE_NEED_DISCONNECT:
2050 _dbus_verbose (" %s auth state: need to disconnect\n",
2051 TRANSPORT_SIDE (transport));
2052 do_io_error (transport);
2055 case DBUS_AUTH_STATE_AUTHENTICATED:
2056 _dbus_verbose (" %s auth state: authenticated\n",
2057 TRANSPORT_SIDE (transport));
2064 *auth_completed = (orig_auth_state != _dbus_transport_try_to_authenticate (transport));
2066 check_read_watch (transport);
2067 check_write_watch (transport);
2068 _dbus_transport_unref (transport);
2077 /* returns false on oom */
2079 do_writing (DBusTransport *transport)
2081 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2084 #ifdef DBUS_AUTHENTICATION
2085 /* No messages without authentication! */
2086 if (!_dbus_transport_try_to_authenticate (transport))
2088 _dbus_verbose ("Not authenticated, not writing anything\n");
2093 if (transport->disconnected)
2095 _dbus_verbose ("Not connected, not writing anything\n");
2100 _dbus_verbose ("do_writing(), have_messages = %d, fd = %d\n",
2101 _dbus_connection_has_messages_to_send_unlocked (transport->connection),
2102 socket_transport->fd);
2107 while (!transport->disconnected && _dbus_connection_has_messages_to_send_unlocked (transport->connection))
2110 DBusMessage *message;
2111 const DBusString *header;
2112 const DBusString *body;
2113 int total_bytes_to_write;
2114 const char* pDestination;
2116 message = _dbus_connection_get_message_to_send (transport->connection);
2117 _dbus_assert (message != NULL);
2118 // if(dbus_message_get_sender(message) == NULL) //needed for daemon todo check if really needed
2120 dbus_message_unlock(message);
2121 dbus_message_set_sender(message, socket_transport->sender);
2122 dbus_message_lock (message);
2124 _dbus_message_get_network_data (message, &header, &body);
2125 total_bytes_to_write = _dbus_string_get_length(header) + _dbus_string_get_length(body);
2126 pDestination = dbus_message_get_destination(message);
2130 if(!strcmp(pDestination, DBUS_SERVICE_DBUS))
2132 if(!strcmp(dbus_message_get_interface(message), DBUS_INTERFACE_DBUS))
2136 ret = emulateOrgFreedesktopDBus(transport, message);
2144 bytes_written = total_bytes_to_write;
2147 //else send to "daemon" as to normal recipient
2151 if (_dbus_auth_needs_encoding (transport->auth))
2153 if (_dbus_string_get_length (&socket_transport->encoded_outgoing) == 0)
2155 if (!_dbus_auth_encode_data (transport->auth,
2156 header, &socket_transport->encoded_outgoing))
2162 if (!_dbus_auth_encode_data (transport->auth,
2163 body, &socket_transport->encoded_outgoing))
2165 _dbus_string_set_length (&socket_transport->encoded_outgoing, 0);
2171 total_bytes_to_write = _dbus_string_get_length (&socket_transport->encoded_outgoing);
2172 if(total_bytes_to_write > socket_transport->max_bytes_written_per_iteration)
2175 bytes_written = kdbus_write_msg(socket_transport, message, pDestination, TRUE);
2179 if(total_bytes_to_write > socket_transport->max_bytes_written_per_iteration)
2182 bytes_written = kdbus_write_msg(socket_transport, message, pDestination, FALSE);
2186 if (bytes_written < 0)
2188 /* EINTR already handled for us */
2190 /* For some discussion of why we also ignore EPIPE here, see
2191 * http://lists.freedesktop.org/archives/dbus/2008-March/009526.html
2194 if (_dbus_get_is_errno_eagain_or_ewouldblock () || _dbus_get_is_errno_epipe ())
2198 _dbus_verbose ("Error writing to remote app: %s\n", _dbus_strerror_from_errno ());
2199 do_io_error (transport);
2205 _dbus_verbose (" wrote %d bytes of %d\n", bytes_written,
2206 total_bytes_to_write);
2208 socket_transport->message_bytes_written += bytes_written;
2210 _dbus_assert (socket_transport->message_bytes_written <=
2211 total_bytes_to_write);
2213 if (socket_transport->message_bytes_written == total_bytes_to_write)
2215 socket_transport->message_bytes_written = 0;
2216 _dbus_string_set_length (&socket_transport->encoded_outgoing, 0);
2217 _dbus_string_compact (&socket_transport->encoded_outgoing, 2048);
2219 _dbus_connection_message_sent_unlocked (transport->connection,
2231 /* returns false on out-of-memory */
2233 do_reading (DBusTransport *transport)
2235 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2238 dbus_bool_t oom = FALSE;
2241 _dbus_verbose ("fd = %d\n",socket_transport->fd);
2243 #ifdef DBUS_AUTHENTICATION
2244 /* No messages without authentication! */
2245 if (!_dbus_transport_try_to_authenticate (transport))
2251 /* See if we've exceeded max messages and need to disable reading */
2252 check_read_watch (transport);
2254 _dbus_assert (socket_transport->read_watch != NULL ||
2255 transport->disconnected);
2257 if (transport->disconnected)
2260 if (!dbus_watch_get_enabled (socket_transport->read_watch))
2263 if (!_dbus_message_loader_get_unix_fds(transport->loader, &fds, &n_fds))
2265 _dbus_verbose ("Out of memory reading file descriptors\n");
2269 _dbus_message_loader_get_buffer (transport->loader, &buffer);
2271 if (_dbus_auth_needs_decoding (transport->auth))
2273 bytes_read = kdbus_read_message(socket_transport, &socket_transport->encoded_incoming, fds, &n_fds);
2275 _dbus_assert (_dbus_string_get_length (&socket_transport->encoded_incoming) == bytes_read);
2279 if (!_dbus_auth_decode_data (transport->auth,
2280 &socket_transport->encoded_incoming,
2283 _dbus_verbose ("Out of memory decoding incoming data\n");
2284 _dbus_message_loader_return_buffer (transport->loader,
2286 _dbus_string_get_length (buffer));
2291 _dbus_string_set_length (&socket_transport->encoded_incoming, 0);
2292 _dbus_string_compact (&socket_transport->encoded_incoming, 2048);
2296 bytes_read = kdbus_read_message(socket_transport, buffer, fds, &n_fds);
2298 if (bytes_read >= 0 && n_fds > 0)
2299 _dbus_verbose("Read %i unix fds\n", n_fds);
2301 _dbus_message_loader_return_buffer (transport->loader,
2303 bytes_read < 0 ? 0 : bytes_read);
2304 _dbus_message_loader_return_unix_fds(transport->loader, fds, bytes_read < 0 ? 0 : n_fds);
2308 /* EINTR already handled for us */
2310 if (_dbus_get_is_errno_enomem ())
2312 _dbus_verbose ("Out of memory in read()/do_reading()\n");
2316 else if (_dbus_get_is_errno_eagain_or_ewouldblock ())
2320 _dbus_verbose ("Error reading from remote app: %s\n",
2321 _dbus_strerror_from_errno ());
2322 do_io_error (transport);
2326 else if (bytes_read == 0)
2328 _dbus_verbose ("Disconnected from remote app\n");
2329 do_io_error (transport);
2334 _dbus_verbose (" read %d bytes\n", bytes_read);
2336 if (!_dbus_transport_queue_messages (transport))
2339 _dbus_verbose (" out of memory when queueing messages we just read in the transport\n");
2343 /* Try reading more data until we get EAGAIN and return, or
2344 * exceed max bytes per iteration. If in blocking mode of
2345 * course we'll block instead of returning.
2357 unix_error_with_read_to_come (DBusTransport *itransport,
2361 DBusTransportSocket *transport = (DBusTransportSocket *) itransport;
2363 if (!((flags & DBUS_WATCH_HANGUP) || (flags & DBUS_WATCH_ERROR)))
2366 /* If we have a read watch enabled ...
2367 we -might have data incoming ... => handle the HANGUP there */
2368 if (watch != transport->read_watch && _dbus_watch_get_enabled (transport->read_watch))
2375 socket_handle_watch (DBusTransport *transport,
2379 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2381 _dbus_assert (watch == socket_transport->read_watch ||
2382 watch == socket_transport->write_watch);
2383 _dbus_assert (watch != NULL);
2385 /* If we hit an error here on a write watch, don't disconnect the transport yet because data can
2386 * still be in the buffer and do_reading may need several iteration to read
2387 * it all (because of its max_bytes_read_per_iteration limit).
2389 if (!(flags & DBUS_WATCH_READABLE) && unix_error_with_read_to_come (transport, watch, flags))
2391 _dbus_verbose ("Hang up or error on watch\n");
2392 _dbus_transport_disconnect (transport);
2396 if (watch == socket_transport->read_watch &&
2397 (flags & DBUS_WATCH_READABLE))
2399 #ifdef DBUS_AUTHENTICATION
2400 dbus_bool_t auth_finished;
2403 _dbus_verbose ("handling read watch %p flags = %x\n",
2406 #ifdef DBUS_AUTHENTICATION
2407 if (!do_authentication (transport, TRUE, FALSE, &auth_finished))
2410 /* We don't want to do a read immediately following
2411 * a successful authentication. This is so we
2412 * have a chance to propagate the authentication
2413 * state further up. Specifically, we need to
2414 * process any pending data from the auth object.
2419 if (!do_reading (transport))
2421 _dbus_verbose ("no memory to read\n");
2424 #ifdef DBUS_AUTHENTICATION
2428 _dbus_verbose ("Not reading anything since we just completed the authentication\n");
2432 else if (watch == socket_transport->write_watch &&
2433 (flags & DBUS_WATCH_WRITABLE))
2436 _dbus_verbose ("handling write watch, have_outgoing_messages = %d\n",
2437 _dbus_connection_has_messages_to_send_unlocked (transport->connection));
2439 #ifdef DBUS_AUTHENTICATION
2440 if (!do_authentication (transport, FALSE, TRUE, NULL))
2443 if (!do_writing (transport))
2445 _dbus_verbose ("no memory to write\n");
2449 /* See if we still need the write watch */
2450 check_write_watch (transport);
2452 #ifdef DBUS_ENABLE_VERBOSE_MODE
2455 if (watch == socket_transport->read_watch)
2456 _dbus_verbose ("asked to handle read watch with non-read condition 0x%x\n",
2458 else if (watch == socket_transport->write_watch)
2459 _dbus_verbose ("asked to handle write watch with non-write condition 0x%x\n",
2462 _dbus_verbose ("asked to handle watch %p on fd %d that we don't recognize\n",
2463 watch, dbus_watch_get_socket (watch));
2465 #endif /* DBUS_ENABLE_VERBOSE_MODE */
2471 socket_disconnect (DBusTransport *transport)
2473 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2475 _dbus_verbose ("\n");
2477 free_watches (transport);
2479 _dbus_close_socket (socket_transport->fd, NULL);
2480 socket_transport->fd = -1;
2484 kdbus_connection_set (DBusTransport *transport)
2486 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2488 dbus_connection_set_is_authenticated(transport->connection); //now we don't have authentication in kdbus
2490 _dbus_watch_set_handler (socket_transport->write_watch,
2491 _dbus_connection_handle_watch,
2492 transport->connection, NULL);
2494 _dbus_watch_set_handler (socket_transport->read_watch,
2495 _dbus_connection_handle_watch,
2496 transport->connection, NULL);
2498 if (!_dbus_connection_add_watch_unlocked (transport->connection,
2499 socket_transport->write_watch))
2502 if (!_dbus_connection_add_watch_unlocked (transport->connection,
2503 socket_transport->read_watch))
2505 _dbus_connection_remove_watch_unlocked (transport->connection,
2506 socket_transport->write_watch);
2510 check_read_watch (transport);
2511 check_write_watch (transport);
2516 /** original dbus copy-pasted
2517 * @todo We need to have a way to wake up the select sleep if
2518 * a new iteration request comes in with a flag (read/write) that
2519 * we're not currently serving. Otherwise a call that just reads
2520 * could block a write call forever (if there are no incoming
2524 kdbus_do_iteration (DBusTransport *transport,
2526 int timeout_milliseconds)
2528 DBusTransportSocket *socket_transport = (DBusTransportSocket*) transport;
2533 _dbus_verbose (" iteration flags = %s%s timeout = %d read_watch = %p write_watch = %p fd = %d\n",
2534 flags & DBUS_ITERATION_DO_READING ? "read" : "",
2535 flags & DBUS_ITERATION_DO_WRITING ? "write" : "",
2536 timeout_milliseconds,
2537 socket_transport->read_watch,
2538 socket_transport->write_watch,
2539 socket_transport->fd);
2541 /* the passed in DO_READING/DO_WRITING flags indicate whether to
2542 * read/write messages, but regardless of those we may need to block
2543 * for reading/writing to do auth. But if we do reading for auth,
2544 * we don't want to read any messages yet if not given DO_READING.
2547 poll_fd.fd = socket_transport->fd;
2550 if (_dbus_transport_try_to_authenticate (transport))
2552 /* This is kind of a hack; if we have stuff to write, then try
2553 * to avoid the poll. This is probably about a 5% speedup on an
2554 * echo client/server.
2556 * If both reading and writing were requested, we want to avoid this
2557 * since it could have funky effects:
2558 * - both ends spinning waiting for the other one to read
2559 * data so they can finish writing
2560 * - prioritizing all writing ahead of reading
2562 if ((flags & DBUS_ITERATION_DO_WRITING) &&
2563 !(flags & (DBUS_ITERATION_DO_READING | DBUS_ITERATION_BLOCK)) &&
2564 !transport->disconnected &&
2565 _dbus_connection_has_messages_to_send_unlocked (transport->connection))
2567 do_writing (transport);
2569 if (transport->disconnected ||
2570 !_dbus_connection_has_messages_to_send_unlocked (transport->connection))
2574 /* If we get here, we decided to do the poll() after all */
2575 _dbus_assert (socket_transport->read_watch);
2576 if (flags & DBUS_ITERATION_DO_READING)
2577 poll_fd.events |= _DBUS_POLLIN;
2579 _dbus_assert (socket_transport->write_watch);
2580 if (flags & DBUS_ITERATION_DO_WRITING)
2581 poll_fd.events |= _DBUS_POLLOUT;
2585 DBusAuthState auth_state;
2587 auth_state = _dbus_auth_do_work (transport->auth);
2589 if (transport->receive_credentials_pending || auth_state == DBUS_AUTH_STATE_WAITING_FOR_INPUT)
2590 poll_fd.events |= _DBUS_POLLIN;
2592 if (transport->send_credentials_pending || auth_state == DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND)
2593 poll_fd.events |= _DBUS_POLLOUT;
2598 if (flags & DBUS_ITERATION_BLOCK)
2599 poll_timeout = timeout_milliseconds;
2603 /* For blocking selects we drop the connection lock here
2604 * to avoid blocking out connection access during a potentially
2605 * indefinite blocking call. The io path is still protected
2606 * by the io_path_cond condvar, so we won't reenter this.
2608 if (flags & DBUS_ITERATION_BLOCK)
2610 _dbus_verbose ("unlock pre poll\n");
2611 _dbus_connection_unlock (transport->connection);
2615 poll_res = _dbus_poll (&poll_fd, 1, poll_timeout);
2617 if (poll_res < 0 && _dbus_get_is_errno_eintr ())
2619 _dbus_verbose ("Error from _dbus_poll(): %s\n", _dbus_strerror_from_errno ());
2623 if (flags & DBUS_ITERATION_BLOCK)
2625 _dbus_verbose ("lock post poll\n");
2626 _dbus_connection_lock (transport->connection);
2632 poll_fd.revents = 0; /* some concern that posix does not guarantee this;
2633 * valgrind flags it as an error. though it probably
2634 * is guaranteed on linux at least.
2637 if (poll_fd.revents & _DBUS_POLLERR)
2638 do_io_error (transport);
2641 dbus_bool_t need_read = (poll_fd.revents & _DBUS_POLLIN) > 0;
2642 dbus_bool_t need_write = (poll_fd.revents & _DBUS_POLLOUT) > 0;
2643 #ifdef DBUS_AUTHENTICATION
2644 dbus_bool_t authentication_completed;
2647 _dbus_verbose ("in iteration, need_read=%d need_write=%d\n",
2648 need_read, need_write);
2649 #ifdef DBUS_AUTHENTICATION
2650 do_authentication (transport, need_read, need_write,
2651 &authentication_completed);
2653 /* See comment in socket_handle_watch. */
2654 if (authentication_completed)
2657 if (need_read && (flags & DBUS_ITERATION_DO_READING))
2658 do_reading (transport);
2659 if (need_write && (flags & DBUS_ITERATION_DO_WRITING))
2660 do_writing (transport);
2664 _dbus_verbose ("Error from _dbus_poll(): %s\n", _dbus_strerror_from_errno ());
2668 /* We need to install the write watch only if we did not
2669 * successfully write everything. Note we need to be careful that we
2670 * don't call check_write_watch *before* do_writing, since it's
2671 * inefficient to add the write watch, and we can avoid it most of
2672 * the time since we can write immediately.
2674 * However, we MUST always call check_write_watch(); DBusConnection code
2675 * relies on the fact that running an iteration will notice that
2676 * messages are pending.
2678 check_write_watch (transport);
2680 _dbus_verbose (" ... leaving do_iteration()\n");
2684 socket_live_messages_changed (DBusTransport *transport)
2686 /* See if we should look for incoming messages again */
2687 check_read_watch (transport);
2690 static const DBusTransportVTable kdbus_vtable = {
2692 socket_handle_watch,
2694 kdbus_connection_set,
2696 socket_live_messages_changed,
2697 socket_get_socket_fd
2701 * Creates a new transport for the given kdbus file descriptor. The file
2702 * descriptor must be nonblocking.
2704 * @param fd the file descriptor.
2705 * @param address the transport's address
2706 * @returns the new transport, or #NULL if no memory.
2708 static DBusTransport*
2709 _dbus_transport_new_for_socket_kdbus (int fd,
2710 const DBusString *address)
2712 DBusTransportSocket *socket_transport;
2714 socket_transport = dbus_new0 (DBusTransportSocket, 1);
2715 if (socket_transport == NULL)
2718 if (!_dbus_string_init (&socket_transport->encoded_outgoing))
2721 if (!_dbus_string_init (&socket_transport->encoded_incoming))
2724 socket_transport->write_watch = _dbus_watch_new (fd,
2725 DBUS_WATCH_WRITABLE,
2728 if (socket_transport->write_watch == NULL)
2731 socket_transport->read_watch = _dbus_watch_new (fd,
2732 DBUS_WATCH_READABLE,
2735 if (socket_transport->read_watch == NULL)
2738 if (!_dbus_transport_init_base (&socket_transport->base,
2743 #ifdef DBUS_AUTHENTICATION
2744 #ifdef HAVE_UNIX_FD_PASSING
2745 _dbus_auth_set_unix_fd_possible(socket_transport->base.auth, _dbus_socket_can_pass_unix_fd(fd));
2749 socket_transport->fd = fd;
2750 socket_transport->message_bytes_written = 0;
2752 /* These values should probably be tunable or something. */
2753 socket_transport->max_bytes_read_per_iteration = DBUS_MAXIMUM_MESSAGE_LENGTH;
2754 socket_transport->max_bytes_written_per_iteration = DBUS_MAXIMUM_MESSAGE_LENGTH;
2756 socket_transport->kdbus_mmap_ptr = NULL;
2757 socket_transport->memfd = -1;
2759 return (DBusTransport*) socket_transport;
2762 _dbus_watch_invalidate (socket_transport->read_watch);
2763 _dbus_watch_unref (socket_transport->read_watch);
2765 _dbus_watch_invalidate (socket_transport->write_watch);
2766 _dbus_watch_unref (socket_transport->write_watch);
2768 _dbus_string_free (&socket_transport->encoded_incoming);
2770 _dbus_string_free (&socket_transport->encoded_outgoing);
2772 dbus_free (socket_transport);
2778 * Opens a connection to the kdbus bus
2780 * This will set FD_CLOEXEC for the socket returned.
2782 * @param path the path to UNIX domain socket
2783 * @param error return location for error code
2784 * @returns connection file descriptor or -1 on error
2786 static int _dbus_connect_kdbus (const char *path, DBusError *error)
2790 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2791 _dbus_verbose ("connecting to kdbus bus %s\n", path);
2793 fd = open(path, O_RDWR|O_CLOEXEC|O_NONBLOCK);
2795 dbus_set_error(error, _dbus_error_from_errno (errno), "Failed to open file descriptor: %s", _dbus_strerror (errno));
2801 * Creates a new transport for kdbus.
2802 * This creates a client-side of a transport.
2804 * @param path the path to the bus.
2805 * @param error address where an error can be returned.
2806 * @returns a new transport, or #NULL on failure.
2808 static DBusTransport* _dbus_transport_new_for_kdbus (const char *path, DBusError *error)
2811 DBusTransport *transport;
2814 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2816 if (!_dbus_string_init (&address))
2818 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2824 if ((!_dbus_string_append (&address, "kdbus:path=")) || (!_dbus_string_append (&address, path)))
2826 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2830 fd = _dbus_connect_kdbus (path, error);
2833 _DBUS_ASSERT_ERROR_IS_SET (error);
2837 _dbus_verbose ("Successfully connected to kdbus bus %s\n", path);
2839 transport = _dbus_transport_new_for_socket_kdbus (fd, &address);
2840 if (transport == NULL)
2842 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2846 _dbus_string_free (&address);
2851 _dbus_close_socket (fd, NULL);
2853 _dbus_string_free (&address);
2859 * Opens kdbus transport if method from address entry is kdbus
2861 * @param entry the address entry to try opening
2862 * @param transport_p return location for the opened transport
2863 * @param error error to be set
2864 * @returns result of the attempt
2866 DBusTransportOpenResult _dbus_transport_open_kdbus(DBusAddressEntry *entry,
2867 DBusTransport **transport_p,
2872 method = dbus_address_entry_get_method (entry);
2873 _dbus_assert (method != NULL);
2875 if (strcmp (method, "kdbus") == 0)
2877 const char *path = dbus_address_entry_get_value (entry, "path");
2881 _dbus_set_bad_address (error, "kdbus", "path", NULL);
2882 return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
2885 *transport_p = _dbus_transport_new_for_kdbus (path, error);
2887 if (*transport_p == NULL)
2889 _DBUS_ASSERT_ERROR_IS_SET (error);
2890 return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
2894 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2895 return DBUS_TRANSPORT_OPEN_OK;
2900 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2901 return DBUS_TRANSPORT_OPEN_NOT_HANDLED;