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22 * @file transport/plugin_transport_unix.c
23 * @brief Transport plugin using unix domain sockets (!)
24 * Clearly, can only be used locally on Unix/Linux hosts...
25 * ONLY INTENDED FOR TESTING!!!
26 * @author Christian Grothoff
27 * @author Nathan Evans
30 #include "gnunet_util_lib.h"
31 #include "gnunet_hello_lib.h"
32 #include "gnunet_protocols.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_transport_service.h"
35 #include "gnunet_transport_plugin.h"
36 #include "transport.h"
40 * Return code we give on 'send' if we failed to send right now
41 * but it makes sense to retry later. (Note: we might want to
42 * move this to the plugin API!?).
49 #define PLUGIN_NAME "unix"
52 * Options for UNIX Domain addresses.
54 enum UNIX_ADDRESS_OPTIONS
59 UNIX_OPTIONS_NONE = 0,
62 * Linux abstract domain sockets should be used.
64 UNIX_OPTIONS_USE_ABSTRACT_SOCKETS = 1
69 * How long until we give up on transmitting the welcome message?
71 #define HOSTNAME_RESOLVE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
73 #define LOG(kind,...) GNUNET_log_from (kind, "transport-unix",__VA_ARGS__)
76 GNUNET_NETWORK_STRUCT_BEGIN
79 * Binary format for an UNIX Domain Socket address in GNUnet.
84 * Options to use for the address, in NBO
86 uint32_t options GNUNET_PACKED;
89 * Length of the address (path length), in NBO
91 uint32_t addrlen GNUNET_PACKED;
93 /* followed by actual path */
98 * UNIX Message-Packet header.
105 struct GNUNET_MessageHeader header;
108 * What is the identity of the sender (GNUNET_hash of public key)
110 struct GNUNET_PeerIdentity sender;
114 GNUNET_NETWORK_STRUCT_END
118 * Information we track for a message awaiting transmission.
120 struct UNIXMessageWrapper
123 * We keep messages in a doubly linked list.
125 struct UNIXMessageWrapper *next;
128 * We keep messages in a doubly linked list.
130 struct UNIXMessageWrapper *prev;
133 * The actual payload (allocated separately right now).
135 struct UNIXMessage *msg;
138 * Session this message belongs to.
140 struct GNUNET_ATS_Session *session;
143 * Function to call upon transmission.
145 GNUNET_TRANSPORT_TransmitContinuation cont;
148 * Closure for @e cont.
153 * Timeout for this message.
155 struct GNUNET_TIME_Absolute timeout;
158 * Number of bytes in @e msg.
163 * Number of bytes of payload encapsulated in @e msg.
168 * Priority of the message (ignored, just dragged along in UNIX).
170 unsigned int priority;
175 * Handle for a session.
177 struct GNUNET_ATS_Session
181 * Sessions with pending messages (!) are kept in a DLL.
183 struct GNUNET_ATS_Session *next;
186 * Sessions with pending messages (!) are kept in a DLL.
188 struct GNUNET_ATS_Session *prev;
191 * To whom are we talking to (set to our identity
192 * if we are still waiting for the welcome message).
194 * FIXME: information duplicated with 'peer' in address!
196 struct GNUNET_PeerIdentity target;
199 * Pointer to the global plugin struct.
201 struct Plugin *plugin;
204 * Address of the other peer.
206 struct GNUNET_HELLO_Address *address;
209 * Number of bytes we currently have in our write queue.
211 unsigned long long bytes_in_queue;
214 * Timeout for this session.
216 struct GNUNET_TIME_Absolute timeout;
219 * Session timeout task.
221 struct GNUNET_SCHEDULER_Task * timeout_task;
224 * Number of messages we currently have in our write queue.
226 unsigned int msgs_in_queue;
232 * Encapsulation of all of the state of the plugin.
238 * Information we keep for each of our listen sockets.
240 struct UNIX_Sock_Info
245 struct GNUNET_NETWORK_Handle *desc;
250 * Encapsulation of all of the state of the plugin.
256 * ID of task used to update our addresses when one expires.
258 struct GNUNET_SCHEDULER_Task * address_update_task;
263 struct GNUNET_SCHEDULER_Task * read_task;
268 struct GNUNET_SCHEDULER_Task * write_task;
271 * Number of bytes we currently have in our write queues.
273 unsigned long long bytes_in_queue;
278 struct GNUNET_TRANSPORT_PluginEnvironment *env;
281 * Sessions (map from peer identity to `struct GNUNET_ATS_Session`)
283 struct GNUNET_CONTAINER_MultiPeerMap *session_map;
286 * Head of queue of messages to transmit.
288 struct UNIXMessageWrapper *msg_head;
291 * Tail of queue of messages to transmit.
293 struct UNIXMessageWrapper *msg_tail;
296 * Path of our unix domain socket (/tmp/unix-plugin)
298 char *unix_socket_path;
301 * Function to call about session status changes.
303 GNUNET_TRANSPORT_SessionInfoCallback sic;
306 * Closure for @e sic.
311 * socket that we transmit all data with
313 struct UNIX_Sock_Info unix_sock;
316 * Address options in HBO
321 * Are we using an abstract UNIX domain socket?
329 * If a session monitor is attached, notify it about the new
332 * @param plugin our plugin
333 * @param session session that changed state
334 * @param state new state of the session
337 notify_session_monitor (struct Plugin *plugin,
338 struct GNUNET_ATS_Session *session,
339 enum GNUNET_TRANSPORT_SessionState state)
341 struct GNUNET_TRANSPORT_SessionInfo info;
343 if (NULL == plugin->sic)
345 memset (&info, 0, sizeof (info));
347 info.is_inbound = GNUNET_SYSERR; /* hard to say */
348 info.num_msg_pending = session->msgs_in_queue;
349 info.num_bytes_pending = session->bytes_in_queue;
350 /* info.receive_delay remains zero as this is not supported by UNIX
351 (cannot selectively not receive from 'some' peer while continuing
352 to receive from others) */
353 info.session_timeout = session->timeout;
354 info.address = session->address;
355 plugin->sic (plugin->sic_cls,
362 * Function called for a quick conversion of the binary address to
363 * a numeric address. Note that the caller must not free the
364 * address and that the next call to this function is allowed
365 * to override the address again.
368 * @param addr binary address
369 * @param addrlen length of the @a addr
370 * @return string representing the same address
373 unix_plugin_address_to_string (void *cls,
377 static char rbuf[1024];
378 struct UnixAddress *ua = (struct UnixAddress *) addr;
383 if ((NULL == addr) || (sizeof (struct UnixAddress) > addrlen))
388 addrstr = (char *) &ua[1];
389 addr_str_len = ntohl (ua->addrlen);
391 if (addr_str_len != addrlen - sizeof(struct UnixAddress))
396 if ('\0' != addrstr[addr_str_len - 1])
401 if (strlen (addrstr) + 1 != addr_str_len)
408 if ('\0' == addrstr[0])
410 memset (rbuf, 0, sizeof (rbuf));
411 GNUNET_snprintf (rbuf,
416 (off == 1) ? "@" : "",
417 (int) (addr_str_len - off),
424 * Functions with this signature are called whenever we need
425 * to close a session due to a disconnect or failure to
426 * establish a connection.
428 * @param cls closure with the `struct Plugin *`
429 * @param session session to close down
430 * @return #GNUNET_OK on success
433 unix_plugin_session_disconnect (void *cls,
434 struct GNUNET_ATS_Session *session)
436 struct Plugin *plugin = cls;
437 struct UNIXMessageWrapper *msgw;
438 struct UNIXMessageWrapper *next;
440 LOG (GNUNET_ERROR_TYPE_DEBUG,
441 "Disconnecting session for peer `%s' `%s'\n",
442 GNUNET_i2s (&session->target),
443 unix_plugin_address_to_string (NULL,
444 session->address->address,
445 session->address->address_length));
446 plugin->env->session_end (plugin->env->cls,
449 next = plugin->msg_head;
454 if (msgw->session != session)
456 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
459 session->msgs_in_queue--;
460 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
461 session->bytes_in_queue -= msgw->msgsize;
462 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
463 plugin->bytes_in_queue -= msgw->msgsize;
464 if (NULL != msgw->cont)
465 msgw->cont (msgw->cont_cls,
466 &msgw->session->target,
469 GNUNET_free (msgw->msg);
472 GNUNET_assert (GNUNET_YES ==
473 GNUNET_CONTAINER_multipeermap_remove (plugin->session_map,
476 GNUNET_STATISTICS_set (plugin->env->stats,
477 "# UNIX sessions active",
478 GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
480 if (NULL != session->timeout_task)
482 GNUNET_SCHEDULER_cancel (session->timeout_task);
483 session->timeout_task = NULL;
484 session->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
486 notify_session_monitor (plugin,
488 GNUNET_TRANSPORT_SS_DONE);
489 GNUNET_HELLO_address_free (session->address);
490 GNUNET_break (0 == session->bytes_in_queue);
491 GNUNET_break (0 == session->msgs_in_queue);
492 GNUNET_free (session);
498 * Session was idle for too long, so disconnect it
500 * @param cls the `struct GNUNET_ATS_Session *` to disconnect
503 session_timeout (void *cls)
505 struct GNUNET_ATS_Session *session = cls;
506 struct GNUNET_TIME_Relative left;
508 session->timeout_task = NULL;
509 left = GNUNET_TIME_absolute_get_remaining (session->timeout);
510 if (0 != left.rel_value_us)
512 /* not actually our turn yet, but let's at least update
513 the monitor, it may think we're about to die ... */
514 notify_session_monitor (session->plugin,
516 GNUNET_TRANSPORT_SS_UPDATE);
517 session->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
522 LOG (GNUNET_ERROR_TYPE_DEBUG,
523 "Session %p was idle for %s, disconnecting\n",
525 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
527 unix_plugin_session_disconnect (session->plugin, session);
532 * Increment session timeout due to activity. We do not immediately
533 * notify the monitor here as that might generate excessive
536 * @param session session for which the timeout should be rescheduled
539 reschedule_session_timeout (struct GNUNET_ATS_Session *session)
541 GNUNET_assert (NULL != session->timeout_task);
542 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
547 * Convert unix path to a `struct sockaddr_un *`
549 * @param unixpath path to convert
550 * @param[out] sock_len set to the length of the address
551 * @return converted unix path
553 static struct sockaddr_un *
554 unix_address_to_sockaddr (const char *unixpath,
557 struct sockaddr_un *un;
560 GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
561 un = GNUNET_new (struct sockaddr_un);
562 un->sun_family = AF_UNIX;
563 slen = strlen (unixpath);
564 if (slen >= sizeof (un->sun_path))
565 slen = sizeof (un->sun_path) - 1;
566 memcpy (un->sun_path, unixpath, slen);
567 un->sun_path[slen] = '\0';
568 slen = sizeof (struct sockaddr_un);
569 #if HAVE_SOCKADDR_IN_SIN_LEN
570 un->sun_len = (u_char) slen;
578 * Closure to #lookup_session_it().
583 * Location to store the session, if found.
585 struct GNUNET_ATS_Session *res;
588 * Address we are looking for.
590 const struct GNUNET_HELLO_Address *address;
595 * Function called to find a session by address.
597 * @param cls the `struct LookupCtx *`
598 * @param key peer we are looking for (unused)
599 * @param value a session
600 * @return #GNUNET_YES if not found (continue looking), #GNUNET_NO on success
603 lookup_session_it (void *cls,
604 const struct GNUNET_PeerIdentity * key,
607 struct LookupCtx *lctx = cls;
608 struct GNUNET_ATS_Session *session = value;
610 if (0 == GNUNET_HELLO_address_cmp (lctx->address,
621 * Find an existing session by address.
623 * @param plugin the plugin
624 * @param address the address to find
625 * @return NULL if session was not found
627 static struct GNUNET_ATS_Session *
628 lookup_session (struct Plugin *plugin,
629 const struct GNUNET_HELLO_Address *address)
631 struct LookupCtx lctx;
633 lctx.address = address;
635 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
637 &lookup_session_it, &lctx);
643 * Function that is called to get the keepalive factor.
644 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
645 * calculate the interval between keepalive packets.
647 * @param cls closure with the `struct Plugin`
648 * @return keepalive factor
651 unix_plugin_query_keepalive_factor (void *cls)
658 * Actually send out the message, assume we've got the address and
659 * send_handle squared away!
662 * @param send_handle which handle to send message on
663 * @param target who should receive this message (ignored by UNIX)
664 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
665 * @param msgbuf_size the size of the @a msgbuf to send
666 * @param priority how important is the message (ignored by UNIX)
667 * @param timeout when should we time out (give up) if we can not transmit?
668 * @param addr the addr to send the message to, needs to be a sockaddr for us
669 * @param addrlen the len of @a addr
670 * @param payload bytes payload to send
671 * @param cont continuation to call once the message has
672 * been transmitted (or if the transport is ready
673 * for the next transmission call; or if the
674 * peer disconnected...)
675 * @param cont_cls closure for @a cont
676 * @return on success the number of bytes written, RETRY for retry, -1 on errors
679 unix_real_send (void *cls,
680 struct GNUNET_NETWORK_Handle *send_handle,
681 const struct GNUNET_PeerIdentity *target,
684 unsigned int priority,
685 struct GNUNET_TIME_Absolute timeout,
686 const struct UnixAddress *addr,
689 GNUNET_TRANSPORT_TransmitContinuation cont,
692 struct Plugin *plugin = cls;
694 struct sockaddr_un *un;
696 const char *unixpath;
698 if (NULL == send_handle)
700 GNUNET_break (0); /* We do not have a send handle */
701 return GNUNET_SYSERR;
703 if ((NULL == addr) || (0 == addrlen))
705 GNUNET_break (0); /* Can never send if we don't have an address */
706 return GNUNET_SYSERR;
709 /* Prepare address */
710 unixpath = (const char *) &addr[1];
711 if (NULL == (un = unix_address_to_sockaddr (unixpath,
718 if ((GNUNET_YES == plugin->is_abstract) &&
719 (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & ntohl(addr->options) )) )
721 un->sun_path[0] = '\0';
725 sent = GNUNET_NETWORK_socket_sendto (send_handle,
728 (const struct sockaddr *) un,
730 if (GNUNET_SYSERR == sent)
732 if ( (EAGAIN == errno) ||
736 return RETRY; /* We have to retry later */
738 if (EMSGSIZE == errno)
741 socklen_t len = sizeof (size);
743 GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle *)
744 send_handle, SOL_SOCKET, SO_SNDBUF, &size,
746 if (size < msgbuf_size)
748 LOG (GNUNET_ERROR_TYPE_DEBUG,
749 "Trying to increase socket buffer size from %u to %u for message size %u\n",
751 (unsigned int) ((msgbuf_size / 1000) + 2) * 1000,
752 (unsigned int) msgbuf_size);
753 size = ((msgbuf_size / 1000) + 2) * 1000;
755 GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle *) send_handle,
756 SOL_SOCKET, SO_SNDBUF,
757 &size, sizeof (size)))
758 goto resend; /* Increased buffer size, retry sending */
761 /* Could not increase buffer size: error, no retry */
762 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
764 return GNUNET_SYSERR;
769 /* Buffer is bigger than message: error, no retry
770 * This should never happen!*/
773 return GNUNET_SYSERR;
778 LOG (GNUNET_ERROR_TYPE_DEBUG,
779 "UNIX transmitted %u-byte message to %s (%d: %s)\n",
780 (unsigned int) msgbuf_size,
781 GNUNET_a2s ((const struct sockaddr *)un, un_len),
783 (sent < 0) ? STRERROR (errno) : "ok");
790 * Function obtain the network type for a session
792 * @param cls closure ('struct Plugin*')
793 * @param session the session
794 * @return the network type in HBO or #GNUNET_SYSERR
796 static enum GNUNET_ATS_Network_Type
797 unix_plugin_get_network (void *cls,
798 struct GNUNET_ATS_Session *session)
800 GNUNET_assert (NULL != session);
801 return GNUNET_ATS_NET_LOOPBACK;
806 * Function obtain the network type for a session
808 * @param cls closure (`struct Plugin *`)
809 * @param address the address
810 * @return the network type
812 static enum GNUNET_ATS_Network_Type
813 unix_plugin_get_network_for_address (void *cls,
814 const struct GNUNET_HELLO_Address *address)
817 return GNUNET_ATS_NET_LOOPBACK;
822 * Creates a new outbound session the transport service will use to send data to the
825 * @param cls the plugin
826 * @param address the address
827 * @return the session or NULL of max connections exceeded
829 static struct GNUNET_ATS_Session *
830 unix_plugin_get_session (void *cls,
831 const struct GNUNET_HELLO_Address *address)
833 struct Plugin *plugin = cls;
834 struct GNUNET_ATS_Session *session;
835 struct UnixAddress *ua;
837 uint32_t addr_str_len;
838 uint32_t addr_option;
840 ua = (struct UnixAddress *) address->address;
841 if ((NULL == address->address) || (0 == address->address_length) ||
842 (sizeof (struct UnixAddress) > address->address_length))
847 addrstr = (char *) &ua[1];
848 addr_str_len = ntohl (ua->addrlen);
849 addr_option = ntohl (ua->options);
851 if ( (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & addr_option)) &&
852 (GNUNET_NO == plugin->is_abstract))
857 if (addr_str_len != address->address_length - sizeof (struct UnixAddress))
859 return NULL; /* This can be a legacy address */
862 if ('\0' != addrstr[addr_str_len - 1])
867 if (strlen (addrstr) + 1 != addr_str_len)
873 /* Check if a session for this address already exists */
874 if (NULL != (session = lookup_session (plugin,
877 LOG (GNUNET_ERROR_TYPE_DEBUG,
878 "Found existing session %p for address `%s'\n",
880 unix_plugin_address_to_string (NULL,
882 address->address_length));
886 /* create a new session */
887 session = GNUNET_new (struct GNUNET_ATS_Session);
888 session->target = address->peer;
889 session->address = GNUNET_HELLO_address_copy (address);
890 session->plugin = plugin;
891 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
892 session->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
895 LOG (GNUNET_ERROR_TYPE_DEBUG,
896 "Creating a new session %p for address `%s'\n",
898 unix_plugin_address_to_string (NULL,
900 address->address_length));
901 (void) GNUNET_CONTAINER_multipeermap_put (plugin->session_map,
902 &address->peer, session,
903 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
904 GNUNET_STATISTICS_set (plugin->env->stats,
905 "# UNIX sessions active",
906 GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
908 notify_session_monitor (plugin,
910 GNUNET_TRANSPORT_SS_INIT);
911 notify_session_monitor (plugin,
913 GNUNET_TRANSPORT_SS_UP);
919 * Function that will be called whenever the transport service wants
920 * to notify the plugin that a session is still active and in use and
921 * therefore the session timeout for this session has to be updated
923 * @param cls closure with the `struct Plugin *`
924 * @param peer which peer was the session for
925 * @param session which session is being updated
928 unix_plugin_update_session_timeout (void *cls,
929 const struct GNUNET_PeerIdentity *peer,
930 struct GNUNET_ATS_Session *session)
932 struct Plugin *plugin = cls;
935 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
942 reschedule_session_timeout (session);
947 * Demultiplexer for UNIX messages
949 * @param plugin the main plugin for this transport
950 * @param sender from which peer the message was received
951 * @param currhdr pointer to the header of the message
952 * @param ua address to look for
953 * @param ua_len length of the address @a ua
956 unix_demultiplexer (struct Plugin *plugin,
957 struct GNUNET_PeerIdentity *sender,
958 const struct GNUNET_MessageHeader *currhdr,
959 const struct UnixAddress *ua,
962 struct GNUNET_ATS_Session *session;
963 struct GNUNET_HELLO_Address *address;
965 GNUNET_assert (ua_len >= sizeof (struct UnixAddress));
966 LOG (GNUNET_ERROR_TYPE_DEBUG,
967 "Received message from %s\n",
968 unix_plugin_address_to_string (NULL, ua, ua_len));
969 GNUNET_STATISTICS_update (plugin->env->stats,
970 "# bytes received via UNIX",
971 ntohs (currhdr->size),
974 /* Look for existing session */
975 address = GNUNET_HELLO_address_allocate (sender,
978 GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
979 session = lookup_session (plugin, address);
982 session = unix_plugin_get_session (plugin, address);
983 /* Notify transport and ATS about new inbound session */
984 plugin->env->session_start (NULL,
987 GNUNET_ATS_NET_LOOPBACK);
991 reschedule_session_timeout (session);
993 GNUNET_HELLO_address_free (address);
994 plugin->env->receive (plugin->env->cls,
1002 * Read from UNIX domain socket (it is ready).
1004 * @param plugin the plugin
1007 unix_plugin_do_read (struct Plugin *plugin)
1009 char buf[65536] GNUNET_ALIGN;
1010 struct UnixAddress *ua;
1011 struct UNIXMessage *msg;
1012 struct GNUNET_PeerIdentity sender;
1013 struct sockaddr_un un;
1020 const struct GNUNET_MessageHeader *currhdr;
1024 addrlen = sizeof (un);
1025 memset (&un, 0, sizeof (un));
1026 ret = GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc,
1028 (struct sockaddr *) &un,
1030 if ((GNUNET_SYSERR == ret) && ((errno == EAGAIN) || (errno == ENOBUFS)))
1032 if (GNUNET_SYSERR == ret)
1034 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
1040 LOG (GNUNET_ERROR_TYPE_DEBUG,
1041 "Read %d bytes from socket %s\n",
1046 GNUNET_assert (AF_UNIX == (un.sun_family));
1047 is_abstract = GNUNET_NO;
1048 if ('\0' == un.sun_path[0])
1050 un.sun_path[0] = '@';
1051 is_abstract = GNUNET_YES;
1054 ua_len = sizeof (struct UnixAddress) + strlen (un.sun_path) + 1;
1055 ua = GNUNET_malloc (ua_len);
1056 ua->addrlen = htonl (strlen (&un.sun_path[0]) +1);
1057 memcpy (&ua[1], &un.sun_path[0], strlen (un.sun_path) + 1);
1059 ua->options = htonl(UNIX_OPTIONS_USE_ABSTRACT_SOCKETS);
1061 ua->options = htonl(UNIX_OPTIONS_NONE);
1063 msg = (struct UNIXMessage *) buf;
1064 csize = ntohs (msg->header.size);
1065 if ((csize < sizeof (struct UNIXMessage)) || (csize > ret))
1067 GNUNET_break_op (0);
1071 msgbuf = (char *) &msg[1];
1074 sizeof (struct GNUNET_PeerIdentity));
1076 tsize = csize - sizeof (struct UNIXMessage);
1077 while (offset + sizeof (struct GNUNET_MessageHeader) <= tsize)
1079 currhdr = (struct GNUNET_MessageHeader *) &msgbuf[offset];
1080 csize = ntohs (currhdr->size);
1081 if ((csize < sizeof (struct GNUNET_MessageHeader)) ||
1082 (csize > tsize - offset))
1084 GNUNET_break_op (0);
1087 unix_demultiplexer (plugin, &sender, currhdr, ua, ua_len);
1095 * Write to UNIX domain socket (it is ready).
1097 * @param plugin handle to the plugin
1100 unix_plugin_do_write (struct Plugin *plugin)
1103 struct UNIXMessageWrapper *msgw;
1104 struct GNUNET_ATS_Session *session;
1108 did_delete = GNUNET_NO;
1109 while (NULL != (msgw = plugin->msg_head))
1111 if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value_us > 0)
1112 break; /* Message is ready for sending */
1113 /* Message has a timeout */
1114 did_delete = GNUNET_YES;
1115 LOG (GNUNET_ERROR_TYPE_DEBUG,
1116 "Timeout for message with %u bytes \n",
1117 (unsigned int) msgw->msgsize);
1118 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1121 session = msgw->session;
1122 session->msgs_in_queue--;
1123 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1124 session->bytes_in_queue -= msgw->msgsize;
1125 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1126 plugin->bytes_in_queue -= msgw->msgsize;
1127 GNUNET_STATISTICS_set (plugin->env->stats,
1128 "# bytes currently in UNIX buffers",
1129 plugin->bytes_in_queue,
1131 GNUNET_STATISTICS_update (plugin->env->stats,
1132 "# UNIX bytes discarded",
1135 if (NULL != msgw->cont)
1136 msgw->cont (msgw->cont_cls,
1137 &msgw->session->target,
1141 GNUNET_free (msgw->msg);
1146 if (GNUNET_YES == did_delete)
1147 notify_session_monitor (plugin,
1149 GNUNET_TRANSPORT_SS_UPDATE);
1150 return; /* Nothing to send at the moment */
1152 session = msgw->session;
1153 sent = unix_real_send (plugin,
1154 plugin->unix_sock.desc,
1156 (const char *) msgw->msg,
1160 msgw->session->address->address,
1161 msgw->session->address->address_length,
1163 msgw->cont, msgw->cont_cls);
1166 GNUNET_STATISTICS_update (plugin->env->stats,
1167 "# UNIX retry attempts",
1169 notify_session_monitor (plugin,
1171 GNUNET_TRANSPORT_SS_UPDATE);
1174 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1177 session->msgs_in_queue--;
1178 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1179 session->bytes_in_queue -= msgw->msgsize;
1180 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1181 plugin->bytes_in_queue -= msgw->msgsize;
1182 GNUNET_STATISTICS_set (plugin->env->stats,
1183 "# bytes currently in UNIX buffers",
1184 plugin->bytes_in_queue, GNUNET_NO);
1185 notify_session_monitor (plugin,
1187 GNUNET_TRANSPORT_SS_UPDATE);
1188 if (GNUNET_SYSERR == sent)
1190 /* failed and no retry */
1191 if (NULL != msgw->cont)
1192 msgw->cont (msgw->cont_cls,
1193 &msgw->session->target,
1196 GNUNET_STATISTICS_update (plugin->env->stats,
1197 "# UNIX bytes discarded",
1200 GNUNET_free (msgw->msg);
1204 /* successfully sent bytes */
1205 GNUNET_break (sent > 0);
1206 GNUNET_STATISTICS_update (plugin->env->stats,
1207 "# bytes transmitted via UNIX",
1210 if (NULL != msgw->cont)
1211 msgw->cont (msgw->cont_cls,
1212 &msgw->session->target,
1216 GNUNET_free (msgw->msg);
1222 * We have been notified that our socket has something to read.
1223 * Then reschedule this function to be called again once more is available.
1225 * @param cls the plugin handle
1228 unix_plugin_select_read (void *cls)
1230 struct Plugin *plugin = cls;
1231 const struct GNUNET_SCHEDULER_TaskContext *tc;
1233 plugin->read_task = NULL;
1234 tc = GNUNET_SCHEDULER_get_task_context ();
1235 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1236 unix_plugin_do_read (plugin);
1238 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1239 plugin->unix_sock.desc,
1240 &unix_plugin_select_read, plugin);
1245 * We have been notified that our socket is ready to write.
1246 * Then reschedule this function to be called again once more is available.
1248 * @param cls the plugin handle
1251 unix_plugin_select_write (void *cls)
1253 struct Plugin *plugin = cls;
1254 const struct GNUNET_SCHEDULER_TaskContext *tc;
1256 plugin->write_task = NULL;
1257 tc = GNUNET_SCHEDULER_get_task_context ();
1258 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
1259 unix_plugin_do_write (plugin);
1260 if (NULL == plugin->msg_head)
1261 return; /* write queue empty */
1262 plugin->write_task =
1263 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1264 plugin->unix_sock.desc,
1265 &unix_plugin_select_write, plugin);
1270 * Function that can be used by the transport service to transmit
1271 * a message using the plugin. Note that in the case of a
1272 * peer disconnecting, the continuation MUST be called
1273 * prior to the disconnect notification itself. This function
1274 * will be called with this peer's HELLO message to initiate
1275 * a fresh connection to another peer.
1277 * @param cls closure
1278 * @param session which session must be used
1279 * @param msgbuf the message to transmit
1280 * @param msgbuf_size number of bytes in @a msgbuf
1281 * @param priority how important is the message (most plugins will
1282 * ignore message priority and just FIFO)
1283 * @param to how long to wait at most for the transmission (does not
1284 * require plugins to discard the message after the timeout,
1285 * just advisory for the desired delay; most plugins will ignore
1287 * @param cont continuation to call once the message has
1288 * been transmitted (or if the transport is ready
1289 * for the next transmission call; or if the
1290 * peer disconnected...); can be NULL
1291 * @param cont_cls closure for @a cont
1292 * @return number of bytes used (on the physical network, with overheads);
1293 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1294 * and does NOT mean that the message was not transmitted (DV)
1297 unix_plugin_send (void *cls,
1298 struct GNUNET_ATS_Session *session,
1301 unsigned int priority,
1302 struct GNUNET_TIME_Relative to,
1303 GNUNET_TRANSPORT_TransmitContinuation cont,
1306 struct Plugin *plugin = cls;
1307 struct UNIXMessageWrapper *wrapper;
1308 struct UNIXMessage *message;
1312 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
1316 LOG (GNUNET_ERROR_TYPE_ERROR,
1317 "Invalid session for peer `%s' `%s'\n",
1318 GNUNET_i2s (&session->target),
1319 unix_plugin_address_to_string (NULL,
1320 session->address->address,
1321 session->address->address_length));
1323 return GNUNET_SYSERR;
1325 LOG (GNUNET_ERROR_TYPE_DEBUG,
1326 "Sending %u bytes with session for peer `%s' `%s'\n",
1328 GNUNET_i2s (&session->target),
1329 unix_plugin_address_to_string (NULL,
1330 session->address->address,
1331 session->address->address_length));
1332 ssize = sizeof (struct UNIXMessage) + msgbuf_size;
1333 message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
1334 message->header.size = htons (ssize);
1335 message->header.type = htons (0);
1336 memcpy (&message->sender, plugin->env->my_identity,
1337 sizeof (struct GNUNET_PeerIdentity));
1338 memcpy (&message[1], msgbuf, msgbuf_size);
1339 wrapper = GNUNET_new (struct UNIXMessageWrapper);
1340 wrapper->msg = message;
1341 wrapper->msgsize = ssize;
1342 wrapper->payload = msgbuf_size;
1343 wrapper->priority = priority;
1344 wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1346 wrapper->cont = cont;
1347 wrapper->cont_cls = cont_cls;
1348 wrapper->session = session;
1349 GNUNET_CONTAINER_DLL_insert_tail (plugin->msg_head,
1352 plugin->bytes_in_queue += ssize;
1353 session->bytes_in_queue += ssize;
1354 session->msgs_in_queue++;
1355 GNUNET_STATISTICS_set (plugin->env->stats,
1356 "# bytes currently in UNIX buffers",
1357 plugin->bytes_in_queue,
1359 notify_session_monitor (plugin,
1361 GNUNET_TRANSPORT_SS_UPDATE);
1362 if (NULL == plugin->write_task)
1363 plugin->write_task =
1364 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1365 plugin->unix_sock.desc,
1366 &unix_plugin_select_write, plugin);
1372 * Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
1374 * @param cls closure for server start, should be a `struct Plugin *`
1375 * @return number of sockets created or #GNUNET_SYSERR on error
1378 unix_transport_server_start (void *cls)
1380 struct Plugin *plugin = cls;
1381 struct sockaddr_un *un;
1384 un = unix_address_to_sockaddr (plugin->unix_socket_path,
1386 if (GNUNET_YES == plugin->is_abstract)
1388 plugin->unix_socket_path[0] = '@';
1389 un->sun_path[0] = '\0';
1391 plugin->unix_sock.desc =
1392 GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
1393 if (NULL == plugin->unix_sock.desc)
1395 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1397 return GNUNET_SYSERR;
1399 if ('\0' != un->sun_path[0])
1401 if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (un->sun_path))
1403 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot create path to `%s'\n"),
1405 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1406 plugin->unix_sock.desc = NULL;
1408 return GNUNET_SYSERR;
1412 GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc,
1413 (const struct sockaddr *) un, un_len))
1415 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
1416 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot bind to `%s'\n"),
1418 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1419 plugin->unix_sock.desc = NULL;
1421 return GNUNET_SYSERR;
1423 LOG (GNUNET_ERROR_TYPE_DEBUG,
1425 plugin->unix_socket_path);
1427 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1428 plugin->unix_sock.desc,
1429 &unix_plugin_select_read, plugin);
1436 * Function that will be called to check if a binary address for this
1437 * plugin is well-formed and corresponds to an address for THIS peer
1438 * (as per our configuration). Naturally, if absolutely necessary,
1439 * plugins can be a bit conservative in their answer, but in general
1440 * plugins should make sure that the address does not redirect
1441 * traffic to a 3rd party that might try to man-in-the-middle our
1444 * @param cls closure, should be our handle to the Plugin
1445 * @param addr pointer to the address
1446 * @param addrlen length of @a addr
1447 * @return #GNUNET_OK if this is a plausible address for this peer
1448 * and transport, #GNUNET_SYSERR if not
1452 unix_plugin_check_address (void *cls,
1456 struct Plugin* plugin = cls;
1457 const struct UnixAddress *ua = addr;
1459 size_t addr_str_len;
1461 if ( (NULL == addr) ||
1463 (sizeof (struct UnixAddress) > addrlen) )
1466 return GNUNET_SYSERR;
1468 addrstr = (char *) &ua[1];
1469 addr_str_len = ntohl (ua->addrlen);
1470 if ('\0' != addrstr[addr_str_len - 1])
1473 return GNUNET_SYSERR;
1475 if (strlen (addrstr) + 1 != addr_str_len)
1478 return GNUNET_SYSERR;
1481 if (0 == strcmp (plugin->unix_socket_path, addrstr))
1483 return GNUNET_SYSERR;
1488 * Convert the transports address to a nice, human-readable
1491 * @param cls closure
1492 * @param type name of the transport that generated the address
1493 * @param addr one of the addresses of the host, NULL for the last address
1494 * the specific address format depends on the transport
1495 * @param addrlen length of the @a addr
1496 * @param numeric should (IP) addresses be displayed in numeric form?
1497 * @param timeout after how long should we give up?
1498 * @param asc function to call on each string
1499 * @param asc_cls closure for @a asc
1502 unix_plugin_address_pretty_printer (void *cls, const char *type,
1506 struct GNUNET_TIME_Relative timeout,
1507 GNUNET_TRANSPORT_AddressStringCallback asc,
1512 if ( (NULL != addr) && (addrlen > 0))
1513 ret = unix_plugin_address_to_string (NULL,
1520 (NULL == ret) ? GNUNET_SYSERR : GNUNET_OK);
1521 asc (asc_cls, NULL, GNUNET_OK);
1526 * Function called to convert a string address to
1529 * @param cls closure (`struct Plugin *`)
1530 * @param addr string address
1531 * @param addrlen length of the @a addr (strlen(addr) + '\0')
1532 * @param buf location to store the buffer
1533 * If the function returns #GNUNET_SYSERR, its contents are undefined.
1534 * @param added length of created address
1535 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1538 unix_plugin_string_to_address (void *cls,
1541 void **buf, size_t *added)
1543 struct UnixAddress *ua;
1550 /* Format unix.options.address */
1555 if ((NULL == addr) || (addrlen == 0))
1558 return GNUNET_SYSERR;
1560 if ('\0' != addr[addrlen - 1])
1563 return GNUNET_SYSERR;
1565 if (strlen (addr) != addrlen - 1)
1568 return GNUNET_SYSERR;
1570 plugin = GNUNET_strdup (addr);
1571 optionstr = strchr (plugin, '.');
1572 if (NULL == optionstr)
1575 GNUNET_free (plugin);
1576 return GNUNET_SYSERR;
1578 optionstr[0] = '\0';
1580 options = atol (optionstr);
1581 address = strchr (optionstr, '.');
1582 if (NULL == address)
1585 GNUNET_free (plugin);
1586 return GNUNET_SYSERR;
1590 if (0 != strcmp(plugin, PLUGIN_NAME))
1593 GNUNET_free (plugin);
1594 return GNUNET_SYSERR;
1597 ua_size = sizeof (struct UnixAddress) + strlen (address) + 1;
1598 ua = GNUNET_malloc (ua_size);
1599 ua->options = htonl (options);
1600 ua->addrlen = htonl (strlen (address) + 1);
1601 memcpy (&ua[1], address, strlen (address) + 1);
1602 GNUNET_free (plugin);
1611 * Notify transport service about address
1613 * @param cls the plugin
1616 address_notification (void *cls)
1618 struct Plugin *plugin = cls;
1619 struct GNUNET_HELLO_Address *address;
1621 struct UnixAddress *ua;
1624 len = sizeof (struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1625 ua = GNUNET_malloc (len);
1626 ua->options = htonl (plugin->myoptions);
1627 ua->addrlen = htonl(strlen (plugin->unix_socket_path) + 1);
1628 unix_path = (char *) &ua[1];
1629 memcpy (unix_path, plugin->unix_socket_path, strlen (plugin->unix_socket_path) + 1);
1631 plugin->address_update_task = NULL;
1632 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1636 GNUNET_HELLO_ADDRESS_INFO_NONE);
1637 plugin->env->notify_address (plugin->env->cls,
1641 GNUNET_free (address);
1646 * Function called on sessions to disconnect
1648 * @param cls the plugin
1649 * @param key peer identity (unused)
1650 * @param value the `struct GNUNET_ATS_Session *` to disconnect
1651 * @return #GNUNET_YES (always, continue to iterate)
1654 get_session_delete_it (void *cls,
1655 const struct GNUNET_PeerIdentity *key,
1658 struct Plugin *plugin = cls;
1659 struct GNUNET_ATS_Session *session = value;
1661 unix_plugin_session_disconnect (plugin, session);
1667 * Disconnect from a remote node. Clean up session if we have one for this peer
1669 * @param cls closure for this call (should be handle to Plugin)
1670 * @param target the peeridentity of the peer to disconnect
1671 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1674 unix_plugin_peer_disconnect (void *cls,
1675 const struct GNUNET_PeerIdentity *target)
1677 struct Plugin *plugin = cls;
1679 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
1681 &get_session_delete_it, plugin);
1686 * Return information about the given session to the
1689 * @param cls the `struct Plugin` with the monitor callback (`sic`)
1690 * @param peer peer we send information about
1691 * @param value our `struct GNUNET_ATS_Session` to send information about
1692 * @return #GNUNET_OK (continue to iterate)
1695 send_session_info_iter (void *cls,
1696 const struct GNUNET_PeerIdentity *peer,
1699 struct Plugin *plugin = cls;
1700 struct GNUNET_ATS_Session *session = value;
1702 notify_session_monitor (plugin,
1704 GNUNET_TRANSPORT_SS_INIT);
1705 notify_session_monitor (plugin,
1707 GNUNET_TRANSPORT_SS_UP);
1713 * Begin monitoring sessions of a plugin. There can only
1714 * be one active monitor per plugin (i.e. if there are
1715 * multiple monitors, the transport service needs to
1716 * multiplex the generated events over all of them).
1718 * @param cls closure of the plugin
1719 * @param sic callback to invoke, NULL to disable monitor;
1720 * plugin will being by iterating over all active
1721 * sessions immediately and then enter monitor mode
1722 * @param sic_cls closure for @a sic
1725 unix_plugin_setup_monitor (void *cls,
1726 GNUNET_TRANSPORT_SessionInfoCallback sic,
1729 struct Plugin *plugin = cls;
1732 plugin->sic_cls = sic_cls;
1735 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1736 &send_session_info_iter,
1738 /* signal end of first iteration */
1739 sic (sic_cls, NULL, NULL);
1745 * The exported method. Initializes the plugin and returns a
1746 * struct with the callbacks.
1748 * @param cls the plugin's execution environment
1749 * @return NULL on error, plugin functions otherwise
1752 libgnunet_plugin_transport_unix_init (void *cls)
1754 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1755 struct GNUNET_TRANSPORT_PluginFunctions *api;
1756 struct Plugin *plugin;
1757 int sockets_created;
1759 if (NULL == env->receive)
1761 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1762 initialze the plugin or the API */
1763 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1765 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1766 api->address_to_string = &unix_plugin_address_to_string;
1767 api->string_to_address = &unix_plugin_string_to_address;
1771 plugin = GNUNET_new (struct Plugin);
1773 GNUNET_CONFIGURATION_get_value_filename (env->cfg,
1776 &plugin->unix_socket_path))
1778 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1781 GNUNET_free (plugin);
1787 /* Initialize my flags */
1789 plugin->is_abstract = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
1791 "USE_ABSTRACT_SOCKETS");
1793 plugin->myoptions = UNIX_OPTIONS_NONE;
1794 if (GNUNET_YES == plugin->is_abstract)
1795 plugin->myoptions = UNIX_OPTIONS_USE_ABSTRACT_SOCKETS;
1797 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1799 api->get_session = &unix_plugin_get_session;
1800 api->send = &unix_plugin_send;
1801 api->disconnect_peer = &unix_plugin_peer_disconnect;
1802 api->disconnect_session = &unix_plugin_session_disconnect;
1803 api->query_keepalive_factor = &unix_plugin_query_keepalive_factor;
1804 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1805 api->address_to_string = &unix_plugin_address_to_string;
1806 api->check_address = &unix_plugin_check_address;
1807 api->string_to_address = &unix_plugin_string_to_address;
1808 api->get_network = &unix_plugin_get_network;
1809 api->get_network_for_address = &unix_plugin_get_network_for_address;
1810 api->update_session_timeout = &unix_plugin_update_session_timeout;
1811 api->setup_monitor = &unix_plugin_setup_monitor;
1812 sockets_created = unix_transport_server_start (plugin);
1813 if ((0 == sockets_created) || (GNUNET_SYSERR == sockets_created))
1815 LOG (GNUNET_ERROR_TYPE_WARNING,
1816 _("Failed to open UNIX listen socket\n"));
1818 GNUNET_free (plugin->unix_socket_path);
1819 GNUNET_free (plugin);
1822 plugin->session_map = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
1823 plugin->address_update_task = GNUNET_SCHEDULER_add_now (&address_notification,
1830 * Shutdown the plugin.
1832 * @param cls the plugin API returned from the initialization function
1833 * @return NULL (always)
1836 libgnunet_plugin_transport_unix_done (void *cls)
1838 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1839 struct Plugin *plugin = api->cls;
1840 struct GNUNET_HELLO_Address *address;
1841 struct UNIXMessageWrapper * msgw;
1842 struct UnixAddress *ua;
1844 struct GNUNET_ATS_Session *session;
1851 len = sizeof (struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1852 ua = GNUNET_malloc (len);
1853 ua->options = htonl (plugin->myoptions);
1854 ua->addrlen = htonl(strlen (plugin->unix_socket_path) + 1);
1856 plugin->unix_socket_path,
1857 strlen (plugin->unix_socket_path) + 1);
1858 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1861 GNUNET_HELLO_ADDRESS_INFO_NONE);
1862 plugin->env->notify_address (plugin->env->cls,
1866 GNUNET_free (address);
1869 while (NULL != (msgw = plugin->msg_head))
1871 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1874 session = msgw->session;
1875 session->msgs_in_queue--;
1876 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1877 session->bytes_in_queue -= msgw->msgsize;
1878 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1879 plugin->bytes_in_queue -= msgw->msgsize;
1880 if (NULL != msgw->cont)
1881 msgw->cont (msgw->cont_cls,
1882 &msgw->session->target,
1885 GNUNET_free (msgw->msg);
1889 if (NULL != plugin->read_task)
1891 GNUNET_SCHEDULER_cancel (plugin->read_task);
1892 plugin->read_task = NULL;
1894 if (NULL != plugin->write_task)
1896 GNUNET_SCHEDULER_cancel (plugin->write_task);
1897 plugin->write_task = NULL;
1899 if (NULL != plugin->address_update_task)
1901 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
1902 plugin->address_update_task = NULL;
1904 if (NULL != plugin->unix_sock.desc)
1906 GNUNET_break (GNUNET_OK ==
1907 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
1908 plugin->unix_sock.desc = NULL;
1910 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1911 &get_session_delete_it,
1913 GNUNET_CONTAINER_multipeermap_destroy (plugin->session_map);
1914 GNUNET_break (0 == plugin->bytes_in_queue);
1915 GNUNET_free (plugin->unix_socket_path);
1916 GNUNET_free (plugin);
1921 /* end of plugin_transport_unix.c */