2 This file is part of GNUnet
3 Copyright (C) 2010-2014 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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 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.
181 * Sessions with pending messages (!) are kept in a DLL.
183 struct Session *next;
186 * Sessions with pending messages (!) are kept in a DLL.
188 struct 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 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 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 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 Session *` to disconnect
501 * @param tc scheduler context
504 session_timeout (void *cls,
505 const struct GNUNET_SCHEDULER_TaskContext *tc)
507 struct Session *session = cls;
508 struct GNUNET_TIME_Relative left;
510 session->timeout_task = NULL;
511 left = GNUNET_TIME_absolute_get_remaining (session->timeout);
512 if (0 != left.rel_value_us)
514 /* not actually our turn yet, but let's at least update
515 the monitor, it may think we're about to die ... */
516 notify_session_monitor (session->plugin,
518 GNUNET_TRANSPORT_SS_UPDATE);
519 session->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
524 LOG (GNUNET_ERROR_TYPE_DEBUG,
525 "Session %p was idle for %s, disconnecting\n",
527 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
529 unix_plugin_session_disconnect (session->plugin, session);
534 * Increment session timeout due to activity. We do not immediately
535 * notify the monitor here as that might generate excessive
538 * @param session session for which the timeout should be rescheduled
541 reschedule_session_timeout (struct Session *session)
543 GNUNET_assert (NULL != session->timeout_task);
544 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
549 * Convert unix path to a `struct sockaddr_un *`
551 * @param unixpath path to convert
552 * @param[out] sock_len set to the length of the address
553 * @return converted unix path
555 static struct sockaddr_un *
556 unix_address_to_sockaddr (const char *unixpath,
559 struct sockaddr_un *un;
562 GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
563 un = GNUNET_new (struct sockaddr_un);
564 un->sun_family = AF_UNIX;
565 slen = strlen (unixpath);
566 if (slen >= sizeof (un->sun_path))
567 slen = sizeof (un->sun_path) - 1;
568 memcpy (un->sun_path, unixpath, slen);
569 un->sun_path[slen] = '\0';
570 slen = sizeof (struct sockaddr_un);
571 #if HAVE_SOCKADDR_IN_SIN_LEN
572 un->sun_len = (u_char) slen;
580 * Closure to #lookup_session_it().
585 * Location to store the session, if found.
590 * Address we are looking for.
592 const struct GNUNET_HELLO_Address *address;
597 * Function called to find a session by address.
599 * @param cls the `struct LookupCtx *`
600 * @param key peer we are looking for (unused)
601 * @param value a session
602 * @return #GNUNET_YES if not found (continue looking), #GNUNET_NO on success
605 lookup_session_it (void *cls,
606 const struct GNUNET_PeerIdentity * key,
609 struct LookupCtx *lctx = cls;
610 struct Session *session = value;
612 if (0 == GNUNET_HELLO_address_cmp (lctx->address,
623 * Find an existing session by address.
625 * @param plugin the plugin
626 * @param address the address to find
627 * @return NULL if session was not found
629 static struct Session *
630 lookup_session (struct Plugin *plugin,
631 const struct GNUNET_HELLO_Address *address)
633 struct LookupCtx lctx;
635 lctx.address = address;
637 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
639 &lookup_session_it, &lctx);
645 * Function that is called to get the keepalive factor.
646 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
647 * calculate the interval between keepalive packets.
649 * @param cls closure with the `struct Plugin`
650 * @return keepalive factor
653 unix_plugin_query_keepalive_factor (void *cls)
660 * Actually send out the message, assume we've got the address and
661 * send_handle squared away!
664 * @param send_handle which handle to send message on
665 * @param target who should receive this message (ignored by UNIX)
666 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
667 * @param msgbuf_size the size of the @a msgbuf to send
668 * @param priority how important is the message (ignored by UNIX)
669 * @param timeout when should we time out (give up) if we can not transmit?
670 * @param addr the addr to send the message to, needs to be a sockaddr for us
671 * @param addrlen the len of @a addr
672 * @param payload bytes payload to send
673 * @param cont continuation to call once the message has
674 * been transmitted (or if the transport is ready
675 * for the next transmission call; or if the
676 * peer disconnected...)
677 * @param cont_cls closure for @a cont
678 * @return on success the number of bytes written, RETRY for retry, -1 on errors
681 unix_real_send (void *cls,
682 struct GNUNET_NETWORK_Handle *send_handle,
683 const struct GNUNET_PeerIdentity *target,
686 unsigned int priority,
687 struct GNUNET_TIME_Absolute timeout,
688 const struct UnixAddress *addr,
691 GNUNET_TRANSPORT_TransmitContinuation cont,
694 struct Plugin *plugin = cls;
696 struct sockaddr_un *un;
698 const char *unixpath;
700 if (NULL == send_handle)
702 GNUNET_break (0); /* We do not have a send handle */
703 return GNUNET_SYSERR;
705 if ((NULL == addr) || (0 == addrlen))
707 GNUNET_break (0); /* Can never send if we don't have an address */
708 return GNUNET_SYSERR;
711 /* Prepare address */
712 unixpath = (const char *) &addr[1];
713 if (NULL == (un = unix_address_to_sockaddr (unixpath,
720 if ((GNUNET_YES == plugin->is_abstract) &&
721 (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & ntohl(addr->options) )) )
723 un->sun_path[0] = '\0';
727 sent = GNUNET_NETWORK_socket_sendto (send_handle,
730 (const struct sockaddr *) un,
732 if (GNUNET_SYSERR == sent)
734 if ( (EAGAIN == errno) ||
738 return RETRY; /* We have to retry later */
740 if (EMSGSIZE == errno)
743 socklen_t len = sizeof (size);
745 GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle *)
746 send_handle, SOL_SOCKET, SO_SNDBUF, &size,
748 if (size < msgbuf_size)
750 LOG (GNUNET_ERROR_TYPE_DEBUG,
751 "Trying to increase socket buffer size from %u to %u for message size %u\n",
753 (unsigned int) ((msgbuf_size / 1000) + 2) * 1000,
754 (unsigned int) msgbuf_size);
755 size = ((msgbuf_size / 1000) + 2) * 1000;
757 GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle *) send_handle,
758 SOL_SOCKET, SO_SNDBUF,
759 &size, sizeof (size)))
760 goto resend; /* Increased buffer size, retry sending */
763 /* Could not increase buffer size: error, no retry */
764 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
766 return GNUNET_SYSERR;
771 /* Buffer is bigger than message: error, no retry
772 * This should never happen!*/
775 return GNUNET_SYSERR;
780 LOG (GNUNET_ERROR_TYPE_DEBUG,
781 "UNIX transmitted %u-byte message to %s (%d: %s)\n",
782 (unsigned int) msgbuf_size,
783 GNUNET_a2s ((const struct sockaddr *)un, un_len),
785 (sent < 0) ? STRERROR (errno) : "ok");
792 * Function obtain the network type for a session
794 * @param cls closure ('struct Plugin*')
795 * @param session the session
796 * @return the network type in HBO or #GNUNET_SYSERR
798 static enum GNUNET_ATS_Network_Type
799 unix_plugin_get_network (void *cls,
800 struct Session *session)
802 GNUNET_assert (NULL != session);
803 return GNUNET_ATS_NET_LOOPBACK;
808 * Creates a new outbound session the transport service will use to send data to the
811 * @param cls the plugin
812 * @param address the address
813 * @return the session or NULL of max connections exceeded
815 static struct Session *
816 unix_plugin_get_session (void *cls,
817 const struct GNUNET_HELLO_Address *address)
819 struct Plugin *plugin = cls;
820 struct Session *session;
821 struct UnixAddress *ua;
823 uint32_t addr_str_len;
824 uint32_t addr_option;
826 ua = (struct UnixAddress *) address->address;
827 if ((NULL == address->address) || (0 == address->address_length) ||
828 (sizeof (struct UnixAddress) > address->address_length))
833 addrstr = (char *) &ua[1];
834 addr_str_len = ntohl (ua->addrlen);
835 addr_option = ntohl (ua->options);
837 if ( (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & addr_option)) &&
838 (GNUNET_NO == plugin->is_abstract))
843 if (addr_str_len != address->address_length - sizeof (struct UnixAddress))
845 return NULL; /* This can be a legacy address */
848 if ('\0' != addrstr[addr_str_len - 1])
853 if (strlen (addrstr) + 1 != addr_str_len)
859 /* Check if a session for this address already exists */
860 if (NULL != (session = lookup_session (plugin,
863 LOG (GNUNET_ERROR_TYPE_DEBUG,
864 "Found existing session %p for address `%s'\n",
866 unix_plugin_address_to_string (NULL,
868 address->address_length));
872 /* create a new session */
873 session = GNUNET_new (struct Session);
874 session->target = address->peer;
875 session->address = GNUNET_HELLO_address_copy (address);
876 session->plugin = plugin;
877 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
878 session->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
881 LOG (GNUNET_ERROR_TYPE_DEBUG,
882 "Creating a new session %p for address `%s'\n",
884 unix_plugin_address_to_string (NULL,
886 address->address_length));
887 (void) GNUNET_CONTAINER_multipeermap_put (plugin->session_map,
888 &address->peer, session,
889 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
890 GNUNET_STATISTICS_set (plugin->env->stats,
891 "# UNIX sessions active",
892 GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
894 notify_session_monitor (plugin,
896 GNUNET_TRANSPORT_SS_INIT);
897 notify_session_monitor (plugin,
899 GNUNET_TRANSPORT_SS_UP);
905 * Function that will be called whenever the transport service wants
906 * to notify the plugin that a session is still active and in use and
907 * therefore the session timeout for this session has to be updated
909 * @param cls closure with the `struct Plugin *`
910 * @param peer which peer was the session for
911 * @param session which session is being updated
914 unix_plugin_update_session_timeout (void *cls,
915 const struct GNUNET_PeerIdentity *peer,
916 struct Session *session)
918 struct Plugin *plugin = cls;
921 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
928 reschedule_session_timeout (session);
933 * Demultiplexer for UNIX messages
935 * @param plugin the main plugin for this transport
936 * @param sender from which peer the message was received
937 * @param currhdr pointer to the header of the message
938 * @param ua address to look for
939 * @param ua_len length of the address @a ua
942 unix_demultiplexer (struct Plugin *plugin,
943 struct GNUNET_PeerIdentity *sender,
944 const struct GNUNET_MessageHeader *currhdr,
945 const struct UnixAddress *ua,
948 struct Session *session;
949 struct GNUNET_HELLO_Address *address;
951 GNUNET_assert (ua_len >= sizeof (struct UnixAddress));
952 LOG (GNUNET_ERROR_TYPE_DEBUG,
953 "Received message from %s\n",
954 unix_plugin_address_to_string (NULL, ua, ua_len));
955 GNUNET_STATISTICS_update (plugin->env->stats,
956 "# bytes received via UNIX",
957 ntohs (currhdr->size),
960 /* Look for existing session */
961 address = GNUNET_HELLO_address_allocate (sender,
964 GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
965 session = lookup_session (plugin, address);
968 session = unix_plugin_get_session (plugin, address);
969 /* Notify transport and ATS about new inbound session */
970 plugin->env->session_start (NULL,
973 GNUNET_ATS_NET_LOOPBACK);
977 reschedule_session_timeout (session);
979 GNUNET_HELLO_address_free (address);
980 plugin->env->receive (plugin->env->cls,
988 * Read from UNIX domain socket (it is ready).
990 * @param plugin the plugin
993 unix_plugin_do_read (struct Plugin *plugin)
995 char buf[65536] GNUNET_ALIGN;
996 struct UnixAddress *ua;
997 struct UNIXMessage *msg;
998 struct GNUNET_PeerIdentity sender;
999 struct sockaddr_un un;
1006 const struct GNUNET_MessageHeader *currhdr;
1010 addrlen = sizeof (un);
1011 memset (&un, 0, sizeof (un));
1012 ret = GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc,
1014 (struct sockaddr *) &un,
1016 if ((GNUNET_SYSERR == ret) && ((errno == EAGAIN) || (errno == ENOBUFS)))
1018 if (GNUNET_SYSERR == ret)
1020 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
1026 LOG (GNUNET_ERROR_TYPE_DEBUG,
1027 "Read %d bytes from socket %s\n",
1032 GNUNET_assert (AF_UNIX == (un.sun_family));
1033 is_abstract = GNUNET_NO;
1034 if ('\0' == un.sun_path[0])
1036 un.sun_path[0] = '@';
1037 is_abstract = GNUNET_YES;
1040 ua_len = sizeof (struct UnixAddress) + strlen (un.sun_path) + 1;
1041 ua = GNUNET_malloc (ua_len);
1042 ua->addrlen = htonl (strlen (&un.sun_path[0]) +1);
1043 memcpy (&ua[1], &un.sun_path[0], strlen (un.sun_path) + 1);
1045 ua->options = htonl(UNIX_OPTIONS_USE_ABSTRACT_SOCKETS);
1047 ua->options = htonl(UNIX_OPTIONS_NONE);
1049 msg = (struct UNIXMessage *) buf;
1050 csize = ntohs (msg->header.size);
1051 if ((csize < sizeof (struct UNIXMessage)) || (csize > ret))
1053 GNUNET_break_op (0);
1057 msgbuf = (char *) &msg[1];
1060 sizeof (struct GNUNET_PeerIdentity));
1062 tsize = csize - sizeof (struct UNIXMessage);
1063 while (offset + sizeof (struct GNUNET_MessageHeader) <= tsize)
1065 currhdr = (struct GNUNET_MessageHeader *) &msgbuf[offset];
1066 csize = ntohs (currhdr->size);
1067 if ((csize < sizeof (struct GNUNET_MessageHeader)) ||
1068 (csize > tsize - offset))
1070 GNUNET_break_op (0);
1073 unix_demultiplexer (plugin, &sender, currhdr, ua, ua_len);
1081 * Write to UNIX domain socket (it is ready).
1083 * @param plugin handle to the plugin
1086 unix_plugin_do_write (struct Plugin *plugin)
1089 struct UNIXMessageWrapper *msgw;
1090 struct Session *session;
1094 did_delete = GNUNET_NO;
1095 while (NULL != (msgw = plugin->msg_head))
1097 if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value_us > 0)
1098 break; /* Message is ready for sending */
1099 /* Message has a timeout */
1100 did_delete = GNUNET_YES;
1101 LOG (GNUNET_ERROR_TYPE_DEBUG,
1102 "Timeout for message with %u bytes \n",
1103 (unsigned int) msgw->msgsize);
1104 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1107 session = msgw->session;
1108 session->msgs_in_queue--;
1109 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1110 session->bytes_in_queue -= msgw->msgsize;
1111 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1112 plugin->bytes_in_queue -= msgw->msgsize;
1113 GNUNET_STATISTICS_set (plugin->env->stats,
1114 "# bytes currently in UNIX buffers",
1115 plugin->bytes_in_queue,
1117 GNUNET_STATISTICS_update (plugin->env->stats,
1118 "# UNIX bytes discarded",
1121 if (NULL != msgw->cont)
1122 msgw->cont (msgw->cont_cls,
1123 &msgw->session->target,
1127 GNUNET_free (msgw->msg);
1132 if (GNUNET_YES == did_delete)
1133 notify_session_monitor (plugin,
1135 GNUNET_TRANSPORT_SS_UPDATE);
1136 return; /* Nothing to send at the moment */
1138 session = msgw->session;
1139 sent = unix_real_send (plugin,
1140 plugin->unix_sock.desc,
1142 (const char *) msgw->msg,
1146 msgw->session->address->address,
1147 msgw->session->address->address_length,
1149 msgw->cont, msgw->cont_cls);
1152 GNUNET_STATISTICS_update (plugin->env->stats,
1153 "# UNIX retry attempts",
1155 notify_session_monitor (plugin,
1157 GNUNET_TRANSPORT_SS_UPDATE);
1160 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1163 session->msgs_in_queue--;
1164 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1165 session->bytes_in_queue -= msgw->msgsize;
1166 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1167 plugin->bytes_in_queue -= msgw->msgsize;
1168 GNUNET_STATISTICS_set (plugin->env->stats,
1169 "# bytes currently in UNIX buffers",
1170 plugin->bytes_in_queue, GNUNET_NO);
1171 notify_session_monitor (plugin,
1173 GNUNET_TRANSPORT_SS_UPDATE);
1174 if (GNUNET_SYSERR == sent)
1176 /* failed and no retry */
1177 if (NULL != msgw->cont)
1178 msgw->cont (msgw->cont_cls,
1179 &msgw->session->target,
1182 GNUNET_STATISTICS_update (plugin->env->stats,
1183 "# UNIX bytes discarded",
1186 GNUNET_free (msgw->msg);
1190 /* successfully sent bytes */
1191 GNUNET_break (sent > 0);
1192 GNUNET_STATISTICS_update (plugin->env->stats,
1193 "# bytes transmitted via UNIX",
1196 if (NULL != msgw->cont)
1197 msgw->cont (msgw->cont_cls,
1198 &msgw->session->target,
1202 GNUNET_free (msgw->msg);
1208 * We have been notified that our socket has something to read.
1209 * Then reschedule this function to be called again once more is available.
1211 * @param cls the plugin handle
1212 * @param tc the scheduling context
1215 unix_plugin_select_read (void *cls,
1216 const struct GNUNET_SCHEDULER_TaskContext *tc)
1218 struct Plugin *plugin = cls;
1220 plugin->read_task = NULL;
1221 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1223 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1224 unix_plugin_do_read (plugin);
1226 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1227 plugin->unix_sock.desc,
1228 &unix_plugin_select_read, plugin);
1233 * We have been notified that our socket is ready to write.
1234 * Then reschedule this function to be called again once more is available.
1236 * @param cls the plugin handle
1237 * @param tc the scheduling context
1240 unix_plugin_select_write (void *cls,
1241 const struct GNUNET_SCHEDULER_TaskContext *tc)
1243 struct Plugin *plugin = cls;
1245 plugin->write_task = NULL;
1246 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1248 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
1249 unix_plugin_do_write (plugin);
1250 if (NULL == plugin->msg_head)
1251 return; /* write queue empty */
1252 plugin->write_task =
1253 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1254 plugin->unix_sock.desc,
1255 &unix_plugin_select_write, plugin);
1260 * Function that can be used by the transport service to transmit
1261 * a message using the plugin. Note that in the case of a
1262 * peer disconnecting, the continuation MUST be called
1263 * prior to the disconnect notification itself. This function
1264 * will be called with this peer's HELLO message to initiate
1265 * a fresh connection to another peer.
1267 * @param cls closure
1268 * @param session which session must be used
1269 * @param msgbuf the message to transmit
1270 * @param msgbuf_size number of bytes in @a msgbuf
1271 * @param priority how important is the message (most plugins will
1272 * ignore message priority and just FIFO)
1273 * @param to how long to wait at most for the transmission (does not
1274 * require plugins to discard the message after the timeout,
1275 * just advisory for the desired delay; most plugins will ignore
1277 * @param cont continuation to call once the message has
1278 * been transmitted (or if the transport is ready
1279 * for the next transmission call; or if the
1280 * peer disconnected...); can be NULL
1281 * @param cont_cls closure for @a cont
1282 * @return number of bytes used (on the physical network, with overheads);
1283 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1284 * and does NOT mean that the message was not transmitted (DV)
1287 unix_plugin_send (void *cls,
1288 struct Session *session,
1291 unsigned int priority,
1292 struct GNUNET_TIME_Relative to,
1293 GNUNET_TRANSPORT_TransmitContinuation cont,
1296 struct Plugin *plugin = cls;
1297 struct UNIXMessageWrapper *wrapper;
1298 struct UNIXMessage *message;
1302 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
1306 LOG (GNUNET_ERROR_TYPE_ERROR,
1307 "Invalid session for peer `%s' `%s'\n",
1308 GNUNET_i2s (&session->target),
1309 unix_plugin_address_to_string (NULL,
1310 session->address->address,
1311 session->address->address_length));
1313 return GNUNET_SYSERR;
1315 LOG (GNUNET_ERROR_TYPE_DEBUG,
1316 "Sending %u bytes with 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));
1322 ssize = sizeof (struct UNIXMessage) + msgbuf_size;
1323 message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
1324 message->header.size = htons (ssize);
1325 message->header.type = htons (0);
1326 memcpy (&message->sender, plugin->env->my_identity,
1327 sizeof (struct GNUNET_PeerIdentity));
1328 memcpy (&message[1], msgbuf, msgbuf_size);
1329 wrapper = GNUNET_new (struct UNIXMessageWrapper);
1330 wrapper->msg = message;
1331 wrapper->msgsize = ssize;
1332 wrapper->payload = msgbuf_size;
1333 wrapper->priority = priority;
1334 wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1336 wrapper->cont = cont;
1337 wrapper->cont_cls = cont_cls;
1338 wrapper->session = session;
1339 GNUNET_CONTAINER_DLL_insert_tail (plugin->msg_head,
1342 plugin->bytes_in_queue += ssize;
1343 session->bytes_in_queue += ssize;
1344 session->msgs_in_queue++;
1345 GNUNET_STATISTICS_set (plugin->env->stats,
1346 "# bytes currently in UNIX buffers",
1347 plugin->bytes_in_queue,
1349 notify_session_monitor (plugin,
1351 GNUNET_TRANSPORT_SS_UPDATE);
1352 if (NULL == plugin->write_task)
1353 plugin->write_task =
1354 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1355 plugin->unix_sock.desc,
1356 &unix_plugin_select_write, plugin);
1362 * Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
1364 * @param cls closure for server start, should be a `struct Plugin *`
1365 * @return number of sockets created or #GNUNET_SYSERR on error
1368 unix_transport_server_start (void *cls)
1370 struct Plugin *plugin = cls;
1371 struct sockaddr_un *un;
1374 un = unix_address_to_sockaddr (plugin->unix_socket_path,
1376 if (GNUNET_YES == plugin->is_abstract)
1378 plugin->unix_socket_path[0] = '@';
1379 un->sun_path[0] = '\0';
1381 plugin->unix_sock.desc =
1382 GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
1383 if (NULL == plugin->unix_sock.desc)
1385 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1386 return GNUNET_SYSERR;
1388 if ('\0' != un->sun_path[0])
1390 if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (un->sun_path))
1392 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot create path to `%s'\n"),
1394 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1395 plugin->unix_sock.desc = NULL;
1397 return GNUNET_SYSERR;
1401 GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc,
1402 (const struct sockaddr *) un, un_len))
1404 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
1405 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot bind to `%s'\n"),
1407 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1408 plugin->unix_sock.desc = NULL;
1410 return GNUNET_SYSERR;
1412 LOG (GNUNET_ERROR_TYPE_DEBUG,
1414 plugin->unix_socket_path);
1416 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1417 plugin->unix_sock.desc,
1418 &unix_plugin_select_read, plugin);
1425 * Function that will be called to check if a binary address for this
1426 * plugin is well-formed and corresponds to an address for THIS peer
1427 * (as per our configuration). Naturally, if absolutely necessary,
1428 * plugins can be a bit conservative in their answer, but in general
1429 * plugins should make sure that the address does not redirect
1430 * traffic to a 3rd party that might try to man-in-the-middle our
1433 * @param cls closure, should be our handle to the Plugin
1434 * @param addr pointer to the address
1435 * @param addrlen length of @a addr
1436 * @return #GNUNET_OK if this is a plausible address for this peer
1437 * and transport, #GNUNET_SYSERR if not
1441 unix_plugin_check_address (void *cls,
1445 struct Plugin* plugin = cls;
1446 const struct UnixAddress *ua = addr;
1448 size_t addr_str_len;
1450 if ( (NULL == addr) ||
1452 (sizeof (struct UnixAddress) > addrlen) )
1455 return GNUNET_SYSERR;
1457 addrstr = (char *) &ua[1];
1458 addr_str_len = ntohl (ua->addrlen);
1459 if ('\0' != addrstr[addr_str_len - 1])
1462 return GNUNET_SYSERR;
1464 if (strlen (addrstr) + 1 != addr_str_len)
1467 return GNUNET_SYSERR;
1470 if (0 == strcmp (plugin->unix_socket_path, addrstr))
1472 return GNUNET_SYSERR;
1477 * Convert the transports address to a nice, human-readable
1480 * @param cls closure
1481 * @param type name of the transport that generated the address
1482 * @param addr one of the addresses of the host, NULL for the last address
1483 * the specific address format depends on the transport
1484 * @param addrlen length of the @a addr
1485 * @param numeric should (IP) addresses be displayed in numeric form?
1486 * @param timeout after how long should we give up?
1487 * @param asc function to call on each string
1488 * @param asc_cls closure for @a asc
1491 unix_plugin_address_pretty_printer (void *cls, const char *type,
1495 struct GNUNET_TIME_Relative timeout,
1496 GNUNET_TRANSPORT_AddressStringCallback asc,
1501 if ( (NULL != addr) && (addrlen > 0))
1502 ret = unix_plugin_address_to_string (NULL,
1509 (NULL == ret) ? GNUNET_SYSERR : GNUNET_OK);
1510 asc (asc_cls, NULL, GNUNET_OK);
1515 * Function called to convert a string address to
1518 * @param cls closure (`struct Plugin *`)
1519 * @param addr string address
1520 * @param addrlen length of the @a addr (strlen(addr) + '\0')
1521 * @param buf location to store the buffer
1522 * If the function returns #GNUNET_SYSERR, its contents are undefined.
1523 * @param added length of created address
1524 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1527 unix_plugin_string_to_address (void *cls,
1530 void **buf, size_t *added)
1532 struct UnixAddress *ua;
1539 /* Format unix.options.address */
1544 if ((NULL == addr) || (addrlen == 0))
1547 return GNUNET_SYSERR;
1549 if ('\0' != addr[addrlen - 1])
1552 return GNUNET_SYSERR;
1554 if (strlen (addr) != addrlen - 1)
1557 return GNUNET_SYSERR;
1559 plugin = GNUNET_strdup (addr);
1560 optionstr = strchr (plugin, '.');
1561 if (NULL == optionstr)
1564 GNUNET_free (plugin);
1565 return GNUNET_SYSERR;
1567 optionstr[0] = '\0';
1569 options = atol (optionstr);
1570 address = strchr (optionstr, '.');
1571 if (NULL == address)
1574 GNUNET_free (plugin);
1575 return GNUNET_SYSERR;
1579 if (0 != strcmp(plugin, PLUGIN_NAME))
1582 GNUNET_free (plugin);
1583 return GNUNET_SYSERR;
1586 ua_size = sizeof (struct UnixAddress) + strlen (address) + 1;
1587 ua = GNUNET_malloc (ua_size);
1588 ua->options = htonl (options);
1589 ua->addrlen = htonl (strlen (address) + 1);
1590 memcpy (&ua[1], address, strlen (address) + 1);
1591 GNUNET_free (plugin);
1600 * Notify transport service about address
1602 * @param cls the plugin
1606 address_notification (void *cls,
1607 const struct GNUNET_SCHEDULER_TaskContext *tc)
1609 struct Plugin *plugin = cls;
1610 struct GNUNET_HELLO_Address *address;
1612 struct UnixAddress *ua;
1615 len = sizeof (struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1616 ua = GNUNET_malloc (len);
1617 ua->options = htonl (plugin->myoptions);
1618 ua->addrlen = htonl(strlen (plugin->unix_socket_path) + 1);
1619 unix_path = (char *) &ua[1];
1620 memcpy (unix_path, plugin->unix_socket_path, strlen (plugin->unix_socket_path) + 1);
1622 plugin->address_update_task = NULL;
1623 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1627 GNUNET_HELLO_ADDRESS_INFO_NONE);
1628 plugin->env->notify_address (plugin->env->cls,
1632 GNUNET_free (address);
1637 * Function called on sessions to disconnect
1639 * @param cls the plugin
1640 * @param key peer identity (unused)
1641 * @param value the `struct Session *` to disconnect
1642 * @return #GNUNET_YES (always, continue to iterate)
1645 get_session_delete_it (void *cls,
1646 const struct GNUNET_PeerIdentity *key,
1649 struct Plugin *plugin = cls;
1650 struct Session *session = value;
1652 unix_plugin_session_disconnect (plugin, session);
1658 * Disconnect from a remote node. Clean up session if we have one for this peer
1660 * @param cls closure for this call (should be handle to Plugin)
1661 * @param target the peeridentity of the peer to disconnect
1662 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1665 unix_plugin_peer_disconnect (void *cls,
1666 const struct GNUNET_PeerIdentity *target)
1668 struct Plugin *plugin = cls;
1670 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
1672 &get_session_delete_it, plugin);
1677 * Return information about the given session to the
1680 * @param cls the `struct Plugin` with the monitor callback (`sic`)
1681 * @param peer peer we send information about
1682 * @param value our `struct Session` to send information about
1683 * @return #GNUNET_OK (continue to iterate)
1686 send_session_info_iter (void *cls,
1687 const struct GNUNET_PeerIdentity *peer,
1690 struct Plugin *plugin = cls;
1691 struct Session *session = value;
1693 notify_session_monitor (plugin,
1695 GNUNET_TRANSPORT_SS_INIT);
1696 notify_session_monitor (plugin,
1698 GNUNET_TRANSPORT_SS_UP);
1704 * Begin monitoring sessions of a plugin. There can only
1705 * be one active monitor per plugin (i.e. if there are
1706 * multiple monitors, the transport service needs to
1707 * multiplex the generated events over all of them).
1709 * @param cls closure of the plugin
1710 * @param sic callback to invoke, NULL to disable monitor;
1711 * plugin will being by iterating over all active
1712 * sessions immediately and then enter monitor mode
1713 * @param sic_cls closure for @a sic
1716 unix_plugin_setup_monitor (void *cls,
1717 GNUNET_TRANSPORT_SessionInfoCallback sic,
1720 struct Plugin *plugin = cls;
1723 plugin->sic_cls = sic_cls;
1726 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1727 &send_session_info_iter,
1729 /* signal end of first iteration */
1730 sic (sic_cls, NULL, NULL);
1736 * The exported method. Initializes the plugin and returns a
1737 * struct with the callbacks.
1739 * @param cls the plugin's execution environment
1740 * @return NULL on error, plugin functions otherwise
1743 libgnunet_plugin_transport_unix_init (void *cls)
1745 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1746 struct GNUNET_TRANSPORT_PluginFunctions *api;
1747 struct Plugin *plugin;
1748 int sockets_created;
1750 if (NULL == env->receive)
1752 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1753 initialze the plugin or the API */
1754 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1756 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1757 api->address_to_string = &unix_plugin_address_to_string;
1758 api->string_to_address = &unix_plugin_string_to_address;
1762 plugin = GNUNET_new (struct Plugin);
1764 GNUNET_CONFIGURATION_get_value_filename (env->cfg,
1767 &plugin->unix_socket_path))
1769 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1772 GNUNET_free (plugin);
1778 /* Initialize my flags */
1780 plugin->is_abstract = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
1782 "USE_ABSTRACT_SOCKETS");
1784 plugin->myoptions = UNIX_OPTIONS_NONE;
1785 if (GNUNET_YES == plugin->is_abstract)
1786 plugin->myoptions = UNIX_OPTIONS_USE_ABSTRACT_SOCKETS;
1788 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1790 api->get_session = &unix_plugin_get_session;
1791 api->send = &unix_plugin_send;
1792 api->disconnect_peer = &unix_plugin_peer_disconnect;
1793 api->disconnect_session = &unix_plugin_session_disconnect;
1794 api->query_keepalive_factor = &unix_plugin_query_keepalive_factor;
1795 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1796 api->address_to_string = &unix_plugin_address_to_string;
1797 api->check_address = &unix_plugin_check_address;
1798 api->string_to_address = &unix_plugin_string_to_address;
1799 api->get_network = &unix_plugin_get_network;
1800 api->update_session_timeout = &unix_plugin_update_session_timeout;
1801 api->setup_monitor = &unix_plugin_setup_monitor;
1802 sockets_created = unix_transport_server_start (plugin);
1803 if ((0 == sockets_created) || (GNUNET_SYSERR == sockets_created))
1805 LOG (GNUNET_ERROR_TYPE_WARNING,
1806 _("Failed to open UNIX listen socket\n"));
1808 GNUNET_free (plugin->unix_socket_path);
1809 GNUNET_free (plugin);
1812 plugin->session_map = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
1813 plugin->address_update_task = GNUNET_SCHEDULER_add_now (&address_notification,
1820 * Shutdown the plugin.
1822 * @param cls the plugin API returned from the initialization function
1823 * @return NULL (always)
1826 libgnunet_plugin_transport_unix_done (void *cls)
1828 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1829 struct Plugin *plugin = api->cls;
1830 struct GNUNET_HELLO_Address *address;
1831 struct UNIXMessageWrapper * msgw;
1832 struct UnixAddress *ua;
1834 struct Session *session;
1841 len = sizeof (struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1842 ua = GNUNET_malloc (len);
1843 ua->options = htonl (plugin->myoptions);
1844 ua->addrlen = htonl(strlen (plugin->unix_socket_path) + 1);
1846 plugin->unix_socket_path,
1847 strlen (plugin->unix_socket_path) + 1);
1848 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1851 GNUNET_HELLO_ADDRESS_INFO_NONE);
1852 plugin->env->notify_address (plugin->env->cls,
1856 GNUNET_free (address);
1859 while (NULL != (msgw = plugin->msg_head))
1861 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1864 session = msgw->session;
1865 session->msgs_in_queue--;
1866 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1867 session->bytes_in_queue -= msgw->msgsize;
1868 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1869 plugin->bytes_in_queue -= msgw->msgsize;
1870 if (NULL != msgw->cont)
1871 msgw->cont (msgw->cont_cls,
1872 &msgw->session->target,
1875 GNUNET_free (msgw->msg);
1879 if (NULL != plugin->read_task)
1881 GNUNET_SCHEDULER_cancel (plugin->read_task);
1882 plugin->read_task = NULL;
1884 if (NULL != plugin->write_task)
1886 GNUNET_SCHEDULER_cancel (plugin->write_task);
1887 plugin->write_task = NULL;
1889 if (NULL != plugin->address_update_task)
1891 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
1892 plugin->address_update_task = NULL;
1894 if (NULL != plugin->unix_sock.desc)
1896 GNUNET_break (GNUNET_OK ==
1897 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
1898 plugin->unix_sock.desc = NULL;
1900 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1901 &get_session_delete_it,
1903 GNUNET_CONTAINER_multipeermap_destroy (plugin->session_map);
1904 GNUNET_break (0 == plugin->bytes_in_queue);
1905 GNUNET_free (plugin->unix_socket_path);
1906 GNUNET_free (plugin);
1911 /* end of plugin_transport_unix.c */