2 This file is part of GNUnet
3 (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.
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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 GNUNET_SCHEDULER_TaskIdentifier 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 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
263 GNUNET_SCHEDULER_TaskIdentifier read_task;
268 GNUNET_SCHEDULER_TaskIdentifier 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
323 struct GNUNET_ATS_Information ats_network;
326 * Are we using an abstract UNIX domain socket?
334 * If a session monitor is attached, notify it about the new
337 * @param plugin our plugin
338 * @param session session that changed state
339 * @param state new state of the session
342 notify_session_monitor (struct Plugin *plugin,
343 struct Session *session,
344 enum GNUNET_TRANSPORT_SessionState state)
346 struct GNUNET_TRANSPORT_SessionInfo info;
348 if (NULL == plugin->sic)
350 memset (&info, 0, sizeof (info));
352 info.is_inbound = GNUNET_SYSERR; /* hard to say */
353 info.num_msg_pending = session->msgs_in_queue;
354 info.num_bytes_pending = session->bytes_in_queue;
355 /* info.receive_delay remains zero as this is not supported by UNIX
356 (cannot selectively not receive from 'some' peer while continuing
357 to receive from others) */
358 info.session_timeout = session->timeout;
359 info.address = session->address;
360 plugin->sic (plugin->sic_cls,
367 * Function called for a quick conversion of the binary address to
368 * a numeric address. Note that the caller must not free the
369 * address and that the next call to this function is allowed
370 * to override the address again.
373 * @param addr binary address
374 * @param addrlen length of the @a addr
375 * @return string representing the same address
378 unix_plugin_address_to_string (void *cls,
382 static char rbuf[1024];
383 struct UnixAddress *ua = (struct UnixAddress *) addr;
388 if ((NULL == addr) || (sizeof (struct UnixAddress) > addrlen))
393 addrstr = (char *) &ua[1];
394 addr_str_len = ntohl (ua->addrlen);
396 if (addr_str_len != addrlen - sizeof(struct UnixAddress))
401 if ('\0' != addrstr[addr_str_len - 1])
406 if (strlen (addrstr) + 1 != addr_str_len)
413 if ('\0' == addrstr[0])
415 memset (rbuf, 0, sizeof (rbuf));
416 GNUNET_snprintf (rbuf,
421 (off == 1) ? "@" : "",
422 (int) (addr_str_len - off),
429 * Functions with this signature are called whenever we need
430 * to close a session due to a disconnect or failure to
431 * establish a connection.
433 * @param cls closure with the `struct Plugin *`
434 * @param session session to close down
435 * @return #GNUNET_OK on success
438 unix_plugin_session_disconnect (void *cls,
439 struct Session *session)
441 struct Plugin *plugin = cls;
442 struct UNIXMessageWrapper *msgw;
443 struct UNIXMessageWrapper *next;
445 LOG (GNUNET_ERROR_TYPE_DEBUG,
446 "Disconnecting session for peer `%s' `%s'\n",
447 GNUNET_i2s (&session->target),
448 unix_plugin_address_to_string (NULL,
449 session->address->address,
450 session->address->address_length));
451 plugin->env->session_end (plugin->env->cls,
454 next = plugin->msg_head;
459 if (msgw->session != session)
461 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
464 session->msgs_in_queue--;
465 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
466 session->bytes_in_queue -= msgw->msgsize;
467 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
468 plugin->bytes_in_queue -= msgw->msgsize;
469 if (NULL != msgw->cont)
470 msgw->cont (msgw->cont_cls,
471 &msgw->session->target,
474 GNUNET_free (msgw->msg);
477 GNUNET_assert (GNUNET_YES ==
478 GNUNET_CONTAINER_multipeermap_remove (plugin->session_map,
481 GNUNET_STATISTICS_set (plugin->env->stats,
482 "# UNIX sessions active",
483 GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
485 if (GNUNET_SCHEDULER_NO_TASK != session->timeout_task)
487 GNUNET_SCHEDULER_cancel (session->timeout_task);
488 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
489 session->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
491 notify_session_monitor (plugin,
493 GNUNET_TRANSPORT_SS_DONE);
494 GNUNET_HELLO_address_free (session->address);
495 GNUNET_break (0 == session->bytes_in_queue);
496 GNUNET_break (0 == session->msgs_in_queue);
497 GNUNET_free (session);
503 * Session was idle for too long, so disconnect it
505 * @param cls the `struct Session *` to disconnect
506 * @param tc scheduler context
509 session_timeout (void *cls,
510 const struct GNUNET_SCHEDULER_TaskContext *tc)
512 struct Session *session = cls;
513 struct GNUNET_TIME_Relative left;
515 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
516 left = GNUNET_TIME_absolute_get_remaining (session->timeout);
517 if (0 != left.rel_value_us)
519 /* not actually our turn yet, but let's at least update
520 the monitor, it may think we're about to die ... */
521 notify_session_monitor (session->plugin,
523 GNUNET_TRANSPORT_SS_UPDATE);
524 session->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
529 LOG (GNUNET_ERROR_TYPE_DEBUG,
530 "Session %p was idle for %s, disconnecting\n",
532 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
534 unix_plugin_session_disconnect (session->plugin, session);
539 * Increment session timeout due to activity. We do not immediately
540 * notify the monitor here as that might generate excessive
543 * @param session session for which the timeout should be rescheduled
546 reschedule_session_timeout (struct Session *session)
548 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != session->timeout_task);
549 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
554 * Convert unix path to a `struct sockaddr_un *`
556 * @param unixpath path to convert
557 * @param[out] sock_len set to the length of the address
558 * @return converted unix path
560 static struct sockaddr_un *
561 unix_address_to_sockaddr (const char *unixpath,
564 struct sockaddr_un *un;
567 GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
568 un = GNUNET_new (struct sockaddr_un);
569 un->sun_family = AF_UNIX;
570 slen = strlen (unixpath);
571 if (slen >= sizeof (un->sun_path))
572 slen = sizeof (un->sun_path) - 1;
573 memcpy (un->sun_path, unixpath, slen);
574 un->sun_path[slen] = '\0';
575 slen = sizeof (struct sockaddr_un);
576 #if HAVE_SOCKADDR_IN_SIN_LEN
577 un->sun_len = (u_char) slen;
585 * Closure to #lookup_session_it().
590 * Location to store the session, if found.
595 * Address we are looking for.
597 const struct GNUNET_HELLO_Address *address;
602 * Function called to find a session by address.
604 * @param cls the `struct LookupCtx *`
605 * @param key peer we are looking for (unused)
606 * @param value a session
607 * @return #GNUNET_YES if not found (continue looking), #GNUNET_NO on success
610 lookup_session_it (void *cls,
611 const struct GNUNET_PeerIdentity * key,
614 struct LookupCtx *lctx = cls;
615 struct Session *session = value;
617 if (0 == GNUNET_HELLO_address_cmp (lctx->address,
628 * Find an existing session by address.
630 * @param plugin the plugin
631 * @param address the address to find
632 * @return NULL if session was not found
634 static struct Session *
635 lookup_session (struct Plugin *plugin,
636 const struct GNUNET_HELLO_Address *address)
638 struct LookupCtx lctx;
640 lctx.address = address;
642 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
644 &lookup_session_it, &lctx);
650 * Function that is called to get the keepalive factor.
651 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
652 * calculate the interval between keepalive packets.
654 * @param cls closure with the `struct Plugin`
655 * @return keepalive factor
658 unix_plugin_query_keepalive_factor (void *cls)
665 * Actually send out the message, assume we've got the address and
666 * send_handle squared away!
669 * @param send_handle which handle to send message on
670 * @param target who should receive this message (ignored by UNIX)
671 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
672 * @param msgbuf_size the size of the @a msgbuf to send
673 * @param priority how important is the message (ignored by UNIX)
674 * @param timeout when should we time out (give up) if we can not transmit?
675 * @param addr the addr to send the message to, needs to be a sockaddr for us
676 * @param addrlen the len of @a addr
677 * @param payload bytes payload to send
678 * @param cont continuation to call once the message has
679 * been transmitted (or if the transport is ready
680 * for the next transmission call; or if the
681 * peer disconnected...)
682 * @param cont_cls closure for @a cont
683 * @return on success the number of bytes written, RETRY for retry, -1 on errors
686 unix_real_send (void *cls,
687 struct GNUNET_NETWORK_Handle *send_handle,
688 const struct GNUNET_PeerIdentity *target,
691 unsigned int priority,
692 struct GNUNET_TIME_Absolute timeout,
693 const struct UnixAddress *addr,
696 GNUNET_TRANSPORT_TransmitContinuation cont,
699 struct Plugin *plugin = cls;
701 struct sockaddr_un *un;
703 const char *unixpath;
705 if (NULL == send_handle)
707 GNUNET_break (0); /* We do not have a send handle */
708 return GNUNET_SYSERR;
710 if ((NULL == addr) || (0 == addrlen))
712 GNUNET_break (0); /* Can never send if we don't have an address */
713 return GNUNET_SYSERR;
716 /* Prepare address */
717 unixpath = (const char *) &addr[1];
718 if (NULL == (un = unix_address_to_sockaddr (unixpath,
725 if ((GNUNET_YES == plugin->is_abstract) &&
726 (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & ntohl(addr->options) )) )
728 un->sun_path[0] = '\0';
732 sent = GNUNET_NETWORK_socket_sendto (send_handle,
735 (const struct sockaddr *) un,
737 if (GNUNET_SYSERR == sent)
739 if ( (EAGAIN == errno) ||
743 return RETRY; /* We have to retry later */
745 if (EMSGSIZE == errno)
748 socklen_t len = sizeof (size);
750 GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle *)
751 send_handle, SOL_SOCKET, SO_SNDBUF, &size,
753 if (size < msgbuf_size)
755 LOG (GNUNET_ERROR_TYPE_DEBUG,
756 "Trying to increase socket buffer size from %u to %u for message size %u\n",
758 (unsigned int) ((msgbuf_size / 1000) + 2) * 1000,
759 (unsigned int) msgbuf_size);
760 size = ((msgbuf_size / 1000) + 2) * 1000;
762 GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle *) send_handle,
763 SOL_SOCKET, SO_SNDBUF,
764 &size, sizeof (size)))
765 goto resend; /* Increased buffer size, retry sending */
768 /* Could not increase buffer size: error, no retry */
769 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
771 return GNUNET_SYSERR;
776 /* Buffer is bigger than message: error, no retry
777 * This should never happen!*/
780 return GNUNET_SYSERR;
785 LOG (GNUNET_ERROR_TYPE_DEBUG,
786 "UNIX transmitted %u-byte message to %s (%d: %s)\n",
787 (unsigned int) msgbuf_size,
788 GNUNET_a2s ((const struct sockaddr *)un, un_len),
790 (sent < 0) ? STRERROR (errno) : "ok");
797 * Function obtain the network type for a session
799 * @param cls closure ('struct Plugin*')
800 * @param session the session
801 * @return the network type in HBO or #GNUNET_SYSERR
803 static enum GNUNET_ATS_Network_Type
804 unix_plugin_get_network (void *cls,
805 struct Session *session)
807 GNUNET_assert (NULL != session);
808 return GNUNET_ATS_NET_LOOPBACK;
813 * Creates a new outbound session the transport service will use to send data to the
816 * @param cls the plugin
817 * @param address the address
818 * @return the session or NULL of max connections exceeded
820 static struct Session *
821 unix_plugin_get_session (void *cls,
822 const struct GNUNET_HELLO_Address *address)
824 struct Plugin *plugin = cls;
825 struct Session *session;
826 struct UnixAddress *ua;
828 uint32_t addr_str_len;
829 uint32_t addr_option;
831 ua = (struct UnixAddress *) address->address;
832 if ((NULL == address->address) || (0 == address->address_length) ||
833 (sizeof (struct UnixAddress) > address->address_length))
838 addrstr = (char *) &ua[1];
839 addr_str_len = ntohl (ua->addrlen);
840 addr_option = ntohl (ua->options);
842 if ( (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & addr_option)) &&
843 (GNUNET_NO == plugin->is_abstract))
848 if (addr_str_len != address->address_length - sizeof (struct UnixAddress))
850 return NULL; /* This can be a legacy address */
853 if ('\0' != addrstr[addr_str_len - 1])
858 if (strlen (addrstr) + 1 != addr_str_len)
864 /* Check if a session for this address already exists */
865 if (NULL != (session = lookup_session (plugin,
868 LOG (GNUNET_ERROR_TYPE_DEBUG,
869 "Found existing session %p for address `%s'\n",
871 unix_plugin_address_to_string (NULL,
873 address->address_length));
877 /* create a new session */
878 session = GNUNET_new (struct Session);
879 session->target = address->peer;
880 session->address = GNUNET_HELLO_address_copy (address);
881 session->plugin = plugin;
882 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
883 session->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
886 LOG (GNUNET_ERROR_TYPE_DEBUG,
887 "Creating a new session %p for address `%s'\n",
889 unix_plugin_address_to_string (NULL,
891 address->address_length));
892 (void) GNUNET_CONTAINER_multipeermap_put (plugin->session_map,
893 &address->peer, session,
894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
895 GNUNET_STATISTICS_set (plugin->env->stats,
896 "# UNIX sessions active",
897 GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
899 notify_session_monitor (plugin,
901 GNUNET_TRANSPORT_SS_INIT);
902 notify_session_monitor (plugin,
904 GNUNET_TRANSPORT_SS_UP);
910 * Function that will be called whenever the transport service wants
911 * to notify the plugin that a session is still active and in use and
912 * therefore the session timeout for this session has to be updated
914 * @param cls closure with the `struct Plugin *`
915 * @param peer which peer was the session for
916 * @param session which session is being updated
919 unix_plugin_update_session_timeout (void *cls,
920 const struct GNUNET_PeerIdentity *peer,
921 struct Session *session)
923 struct Plugin *plugin = cls;
926 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
933 reschedule_session_timeout (session);
938 * Demultiplexer for UNIX messages
940 * @param plugin the main plugin for this transport
941 * @param sender from which peer the message was received
942 * @param currhdr pointer to the header of the message
943 * @param ua address to look for
944 * @param ua_len length of the address @a ua
947 unix_demultiplexer (struct Plugin *plugin,
948 struct GNUNET_PeerIdentity *sender,
949 const struct GNUNET_MessageHeader *currhdr,
950 const struct UnixAddress *ua, size_t ua_len)
952 struct Session *session;
953 struct GNUNET_HELLO_Address *address;
955 GNUNET_break (ntohl(plugin->ats_network.value) != GNUNET_ATS_NET_UNSPECIFIED);
956 GNUNET_assert (ua_len >= sizeof (struct UnixAddress));
957 LOG (GNUNET_ERROR_TYPE_DEBUG,
958 "Received message from %s\n",
959 unix_plugin_address_to_string (NULL, ua, ua_len));
960 GNUNET_STATISTICS_update (plugin->env->stats,
961 "# bytes received via UNIX",
962 ntohs (currhdr->size),
965 /* Look for existing session */
966 address = GNUNET_HELLO_address_allocate (sender,
969 GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
970 session = lookup_session (plugin, address);
973 session = unix_plugin_get_session (plugin, address);
974 /* Notify transport and ATS about new inbound session */
975 plugin->env->session_start (NULL,
978 &plugin->ats_network, 1);
982 reschedule_session_timeout (session);
984 GNUNET_HELLO_address_free (address);
985 plugin->env->receive (plugin->env->cls,
989 plugin->env->update_address_metrics (plugin->env->cls,
992 &plugin->ats_network, 1);
997 * Read from UNIX domain socket (it is ready).
999 * @param plugin the plugin
1002 unix_plugin_do_read (struct Plugin *plugin)
1004 char buf[65536] GNUNET_ALIGN;
1005 struct UnixAddress *ua;
1006 struct UNIXMessage *msg;
1007 struct GNUNET_PeerIdentity sender;
1008 struct sockaddr_un un;
1015 const struct GNUNET_MessageHeader *currhdr;
1019 addrlen = sizeof (un);
1020 memset (&un, 0, sizeof (un));
1021 ret = GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc,
1023 (struct sockaddr *) &un,
1025 if ((GNUNET_SYSERR == ret) && ((errno == EAGAIN) || (errno == ENOBUFS)))
1027 if (GNUNET_SYSERR == ret)
1029 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
1035 LOG (GNUNET_ERROR_TYPE_DEBUG,
1036 "Read %d bytes from socket %s\n",
1041 GNUNET_assert (AF_UNIX == (un.sun_family));
1042 is_abstract = GNUNET_NO;
1043 if ('\0' == un.sun_path[0])
1045 un.sun_path[0] = '@';
1046 is_abstract = GNUNET_YES;
1049 ua_len = sizeof (struct UnixAddress) + strlen (un.sun_path) + 1;
1050 ua = GNUNET_malloc (ua_len);
1051 ua->addrlen = htonl (strlen (&un.sun_path[0]) +1);
1052 memcpy (&ua[1], &un.sun_path[0], strlen (un.sun_path) + 1);
1054 ua->options = htonl(UNIX_OPTIONS_USE_ABSTRACT_SOCKETS);
1056 ua->options = htonl(UNIX_OPTIONS_NONE);
1058 msg = (struct UNIXMessage *) buf;
1059 csize = ntohs (msg->header.size);
1060 if ((csize < sizeof (struct UNIXMessage)) || (csize > ret))
1062 GNUNET_break_op (0);
1066 msgbuf = (char *) &msg[1];
1069 sizeof (struct GNUNET_PeerIdentity));
1071 tsize = csize - sizeof (struct UNIXMessage);
1072 while (offset + sizeof (struct GNUNET_MessageHeader) <= tsize)
1074 currhdr = (struct GNUNET_MessageHeader *) &msgbuf[offset];
1075 csize = ntohs (currhdr->size);
1076 if ((csize < sizeof (struct GNUNET_MessageHeader)) ||
1077 (csize > tsize - offset))
1079 GNUNET_break_op (0);
1082 unix_demultiplexer (plugin, &sender, currhdr, ua, ua_len);
1090 * Write to UNIX domain socket (it is ready).
1092 * @param plugin handle to the plugin
1095 unix_plugin_do_write (struct Plugin *plugin)
1098 struct UNIXMessageWrapper *msgw;
1099 struct Session *session;
1103 did_delete = GNUNET_NO;
1104 while (NULL != (msgw = plugin->msg_head))
1106 if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value_us > 0)
1107 break; /* Message is ready for sending */
1108 /* Message has a timeout */
1109 did_delete = GNUNET_YES;
1110 LOG (GNUNET_ERROR_TYPE_DEBUG,
1111 "Timeout for message with %u bytes \n",
1112 (unsigned int) msgw->msgsize);
1113 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1116 session = msgw->session;
1117 session->msgs_in_queue--;
1118 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1119 session->bytes_in_queue -= msgw->msgsize;
1120 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1121 plugin->bytes_in_queue -= msgw->msgsize;
1122 GNUNET_STATISTICS_set (plugin->env->stats,
1123 "# bytes currently in UNIX buffers",
1124 plugin->bytes_in_queue,
1126 GNUNET_STATISTICS_update (plugin->env->stats,
1127 "# UNIX bytes discarded",
1130 if (NULL != msgw->cont)
1131 msgw->cont (msgw->cont_cls,
1132 &msgw->session->target,
1136 GNUNET_free (msgw->msg);
1141 if (GNUNET_YES == did_delete)
1142 notify_session_monitor (plugin,
1144 GNUNET_TRANSPORT_SS_UPDATE);
1145 return; /* Nothing to send at the moment */
1147 session = msgw->session;
1148 sent = unix_real_send (plugin,
1149 plugin->unix_sock.desc,
1151 (const char *) msgw->msg,
1155 msgw->session->address->address,
1156 msgw->session->address->address_length,
1158 msgw->cont, msgw->cont_cls);
1161 GNUNET_STATISTICS_update (plugin->env->stats,
1162 "# UNIX retry attempts",
1164 notify_session_monitor (plugin,
1166 GNUNET_TRANSPORT_SS_UPDATE);
1169 GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
1172 session->msgs_in_queue--;
1173 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1174 session->bytes_in_queue -= msgw->msgsize;
1175 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1176 plugin->bytes_in_queue -= msgw->msgsize;
1177 GNUNET_STATISTICS_set (plugin->env->stats,
1178 "# bytes currently in UNIX buffers",
1179 plugin->bytes_in_queue, GNUNET_NO);
1180 notify_session_monitor (plugin,
1182 GNUNET_TRANSPORT_SS_UPDATE);
1183 if (GNUNET_SYSERR == sent)
1185 /* failed and no retry */
1186 if (NULL != msgw->cont)
1187 msgw->cont (msgw->cont_cls,
1188 &msgw->session->target,
1191 GNUNET_STATISTICS_update (plugin->env->stats,
1192 "# UNIX bytes discarded",
1195 GNUNET_free (msgw->msg);
1199 /* successfully sent bytes */
1200 GNUNET_break (sent > 0);
1201 GNUNET_STATISTICS_update (plugin->env->stats,
1202 "# bytes transmitted via UNIX",
1205 if (NULL != msgw->cont)
1206 msgw->cont (msgw->cont_cls,
1207 &msgw->session->target,
1211 GNUNET_free (msgw->msg);
1217 * We have been notified that our socket has something to read.
1218 * Then reschedule this function to be called again once more is available.
1220 * @param cls the plugin handle
1221 * @param tc the scheduling context
1224 unix_plugin_select_read (void *cls,
1225 const struct GNUNET_SCHEDULER_TaskContext *tc)
1227 struct Plugin *plugin = cls;
1229 plugin->read_task = GNUNET_SCHEDULER_NO_TASK;
1230 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1232 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1233 unix_plugin_do_read (plugin);
1235 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1236 plugin->unix_sock.desc,
1237 &unix_plugin_select_read, plugin);
1242 * We have been notified that our socket is ready to write.
1243 * Then reschedule this function to be called again once more is available.
1245 * @param cls the plugin handle
1246 * @param tc the scheduling context
1249 unix_plugin_select_write (void *cls,
1250 const struct GNUNET_SCHEDULER_TaskContext *tc)
1252 struct Plugin *plugin = cls;
1254 plugin->write_task = GNUNET_SCHEDULER_NO_TASK;
1255 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1257 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
1258 unix_plugin_do_write (plugin);
1259 if (NULL == plugin->msg_head)
1260 return; /* write queue empty */
1261 plugin->write_task =
1262 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1263 plugin->unix_sock.desc,
1264 &unix_plugin_select_write, plugin);
1269 * Function that can be used by the transport service to transmit
1270 * a message using the plugin. Note that in the case of a
1271 * peer disconnecting, the continuation MUST be called
1272 * prior to the disconnect notification itself. This function
1273 * will be called with this peer's HELLO message to initiate
1274 * a fresh connection to another peer.
1276 * @param cls closure
1277 * @param session which session must be used
1278 * @param msgbuf the message to transmit
1279 * @param msgbuf_size number of bytes in @a msgbuf
1280 * @param priority how important is the message (most plugins will
1281 * ignore message priority and just FIFO)
1282 * @param to how long to wait at most for the transmission (does not
1283 * require plugins to discard the message after the timeout,
1284 * just advisory for the desired delay; most plugins will ignore
1286 * @param cont continuation to call once the message has
1287 * been transmitted (or if the transport is ready
1288 * for the next transmission call; or if the
1289 * peer disconnected...); can be NULL
1290 * @param cont_cls closure for @a cont
1291 * @return number of bytes used (on the physical network, with overheads);
1292 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1293 * and does NOT mean that the message was not transmitted (DV)
1296 unix_plugin_send (void *cls,
1297 struct Session *session,
1300 unsigned int priority,
1301 struct GNUNET_TIME_Relative to,
1302 GNUNET_TRANSPORT_TransmitContinuation cont,
1305 struct Plugin *plugin = cls;
1306 struct UNIXMessageWrapper *wrapper;
1307 struct UNIXMessage *message;
1311 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
1315 LOG (GNUNET_ERROR_TYPE_ERROR,
1316 "Invalid session for peer `%s' `%s'\n",
1317 GNUNET_i2s (&session->target),
1318 unix_plugin_address_to_string (NULL,
1319 session->address->address,
1320 session->address->address_length));
1322 return GNUNET_SYSERR;
1324 LOG (GNUNET_ERROR_TYPE_DEBUG,
1325 "Sending %u bytes with session for peer `%s' `%s'\n",
1327 GNUNET_i2s (&session->target),
1328 unix_plugin_address_to_string (NULL,
1329 session->address->address,
1330 session->address->address_length));
1331 ssize = sizeof (struct UNIXMessage) + msgbuf_size;
1332 message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
1333 message->header.size = htons (ssize);
1334 message->header.type = htons (0);
1335 memcpy (&message->sender, plugin->env->my_identity,
1336 sizeof (struct GNUNET_PeerIdentity));
1337 memcpy (&message[1], msgbuf, msgbuf_size);
1338 wrapper = GNUNET_new (struct UNIXMessageWrapper);
1339 wrapper->msg = message;
1340 wrapper->msgsize = ssize;
1341 wrapper->payload = msgbuf_size;
1342 wrapper->priority = priority;
1343 wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1345 wrapper->cont = cont;
1346 wrapper->cont_cls = cont_cls;
1347 wrapper->session = session;
1348 GNUNET_CONTAINER_DLL_insert_tail (plugin->msg_head,
1351 plugin->bytes_in_queue += ssize;
1352 session->bytes_in_queue += ssize;
1353 session->msgs_in_queue++;
1354 GNUNET_STATISTICS_set (plugin->env->stats,
1355 "# bytes currently in UNIX buffers",
1356 plugin->bytes_in_queue,
1358 notify_session_monitor (plugin,
1360 GNUNET_TRANSPORT_SS_UPDATE);
1361 if (GNUNET_SCHEDULER_NO_TASK == plugin->write_task)
1362 plugin->write_task =
1363 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1364 plugin->unix_sock.desc,
1365 &unix_plugin_select_write, plugin);
1371 * Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
1373 * @param cls closure for server start, should be a `struct Plugin *`
1374 * @return number of sockets created or #GNUNET_SYSERR on error
1377 unix_transport_server_start (void *cls)
1379 struct Plugin *plugin = cls;
1380 struct sockaddr_un *un;
1383 un = unix_address_to_sockaddr (plugin->unix_socket_path,
1385 if (GNUNET_YES == plugin->is_abstract)
1387 plugin->unix_socket_path[0] = '@';
1388 un->sun_path[0] = '\0';
1390 plugin->ats_network = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) un, un_len);
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");
1396 return GNUNET_SYSERR;
1398 if ('\0' != un->sun_path[0])
1400 if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (un->sun_path))
1402 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot create path to `%s'\n"),
1404 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1405 plugin->unix_sock.desc = NULL;
1407 return GNUNET_SYSERR;
1411 GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc,
1412 (const struct sockaddr *) un, un_len))
1414 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
1415 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot bind to `%s'\n"),
1417 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1418 plugin->unix_sock.desc = NULL;
1420 return GNUNET_SYSERR;
1422 LOG (GNUNET_ERROR_TYPE_DEBUG,
1424 plugin->unix_socket_path);
1426 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1427 plugin->unix_sock.desc,
1428 &unix_plugin_select_read, plugin);
1435 * Function that will be called to check if a binary address for this
1436 * plugin is well-formed and corresponds to an address for THIS peer
1437 * (as per our configuration). Naturally, if absolutely necessary,
1438 * plugins can be a bit conservative in their answer, but in general
1439 * plugins should make sure that the address does not redirect
1440 * traffic to a 3rd party that might try to man-in-the-middle our
1443 * @param cls closure, should be our handle to the Plugin
1444 * @param addr pointer to the address
1445 * @param addrlen length of @a addr
1446 * @return #GNUNET_OK if this is a plausible address for this peer
1447 * and transport, #GNUNET_SYSERR if not
1451 unix_plugin_check_address (void *cls,
1455 struct Plugin* plugin = cls;
1456 const struct UnixAddress *ua = addr;
1458 size_t addr_str_len;
1460 if ( (NULL == addr) ||
1462 (sizeof (struct UnixAddress) > addrlen) )
1465 return GNUNET_SYSERR;
1467 addrstr = (char *) &ua[1];
1468 addr_str_len = ntohl (ua->addrlen);
1469 if ('\0' != addrstr[addr_str_len - 1])
1472 return GNUNET_SYSERR;
1474 if (strlen (addrstr) + 1 != addr_str_len)
1477 return GNUNET_SYSERR;
1480 if (0 == strcmp (plugin->unix_socket_path, addrstr))
1482 return GNUNET_SYSERR;
1487 * Convert the transports address to a nice, human-readable
1490 * @param cls closure
1491 * @param type name of the transport that generated the address
1492 * @param addr one of the addresses of the host, NULL for the last address
1493 * the specific address format depends on the transport
1494 * @param addrlen length of the @a addr
1495 * @param numeric should (IP) addresses be displayed in numeric form?
1496 * @param timeout after how long should we give up?
1497 * @param asc function to call on each string
1498 * @param asc_cls closure for @a asc
1501 unix_plugin_address_pretty_printer (void *cls, const char *type,
1505 struct GNUNET_TIME_Relative timeout,
1506 GNUNET_TRANSPORT_AddressStringCallback asc,
1511 if ( (NULL != addr) && (addrlen > 0))
1512 ret = unix_plugin_address_to_string (NULL,
1519 (NULL == ret) ? GNUNET_SYSERR : GNUNET_OK);
1520 asc (asc_cls, NULL, GNUNET_OK);
1525 * Function called to convert a string address to
1528 * @param cls closure (`struct Plugin *`)
1529 * @param addr string address
1530 * @param addrlen length of the @a addr (strlen(addr) + '\0')
1531 * @param buf location to store the buffer
1532 * If the function returns #GNUNET_SYSERR, its contents are undefined.
1533 * @param added length of created address
1534 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1537 unix_plugin_string_to_address (void *cls,
1540 void **buf, size_t *added)
1542 struct UnixAddress *ua;
1549 /* Format unix.options.address */
1554 if ((NULL == addr) || (addrlen == 0))
1557 return GNUNET_SYSERR;
1559 if ('\0' != addr[addrlen - 1])
1562 return GNUNET_SYSERR;
1564 if (strlen (addr) != addrlen - 1)
1567 return GNUNET_SYSERR;
1569 plugin = GNUNET_strdup (addr);
1570 optionstr = strchr (plugin, '.');
1571 if (NULL == optionstr)
1574 GNUNET_free (plugin);
1575 return GNUNET_SYSERR;
1577 optionstr[0] = '\0';
1579 options = atol (optionstr);
1580 address = strchr (optionstr, '.');
1581 if (NULL == address)
1584 GNUNET_free (plugin);
1585 return GNUNET_SYSERR;
1589 if (0 != strcmp(plugin, PLUGIN_NAME))
1592 GNUNET_free (plugin);
1593 return GNUNET_SYSERR;
1596 ua_size = sizeof (struct UnixAddress) + strlen (address) + 1;
1597 ua = GNUNET_malloc (ua_size);
1598 ua->options = htonl (options);
1599 ua->addrlen = htonl (strlen (address) + 1);
1600 memcpy (&ua[1], address, strlen (address) + 1);
1601 GNUNET_free (plugin);
1610 * Notify transport service about address
1612 * @param cls the plugin
1616 address_notification (void *cls,
1617 const struct GNUNET_SCHEDULER_TaskContext *tc)
1619 struct Plugin *plugin = cls;
1620 struct GNUNET_HELLO_Address *address;
1622 struct UnixAddress *ua;
1625 len = sizeof (struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1626 ua = GNUNET_malloc (len);
1627 ua->options = htonl (plugin->myoptions);
1628 ua->addrlen = htonl(strlen (plugin->unix_socket_path) + 1);
1629 unix_path = (char *) &ua[1];
1630 memcpy (unix_path, plugin->unix_socket_path, strlen (plugin->unix_socket_path) + 1);
1632 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
1633 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1637 GNUNET_HELLO_ADDRESS_INFO_NONE);
1638 plugin->env->notify_address (plugin->env->cls,
1642 GNUNET_free (address);
1647 * Function called on sessions to disconnect
1649 * @param cls the plugin
1650 * @param key peer identity (unused)
1651 * @param value the `struct Session *` to disconnect
1652 * @return #GNUNET_YES (always, continue to iterate)
1655 get_session_delete_it (void *cls,
1656 const struct GNUNET_PeerIdentity *key,
1659 struct Plugin *plugin = cls;
1660 struct Session *session = value;
1662 unix_plugin_session_disconnect (plugin, session);
1668 * Disconnect from a remote node. Clean up session if we have one for this peer
1670 * @param cls closure for this call (should be handle to Plugin)
1671 * @param target the peeridentity of the peer to disconnect
1672 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1675 unix_plugin_peer_disconnect (void *cls,
1676 const struct GNUNET_PeerIdentity *target)
1678 struct Plugin *plugin = cls;
1680 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
1682 &get_session_delete_it, plugin);
1687 * Return information about the given session to the
1690 * @param cls the `struct Plugin` with the monitor callback (`sic`)
1691 * @param peer peer we send information about
1692 * @param value our `struct Session` to send information about
1693 * @return #GNUNET_OK (continue to iterate)
1696 send_session_info_iter (void *cls,
1697 const struct GNUNET_PeerIdentity *peer,
1700 struct Plugin *plugin = cls;
1701 struct Session *session = value;
1703 notify_session_monitor (plugin,
1705 GNUNET_TRANSPORT_SS_INIT);
1706 notify_session_monitor (plugin,
1708 GNUNET_TRANSPORT_SS_UP);
1714 * Begin monitoring sessions of a plugin. There can only
1715 * be one active monitor per plugin (i.e. if there are
1716 * multiple monitors, the transport service needs to
1717 * multiplex the generated events over all of them).
1719 * @param cls closure of the plugin
1720 * @param sic callback to invoke, NULL to disable monitor;
1721 * plugin will being by iterating over all active
1722 * sessions immediately and then enter monitor mode
1723 * @param sic_cls closure for @a sic
1726 unix_plugin_setup_monitor (void *cls,
1727 GNUNET_TRANSPORT_SessionInfoCallback sic,
1730 struct Plugin *plugin = cls;
1733 plugin->sic_cls = sic_cls;
1736 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1737 &send_session_info_iter,
1739 /* signal end of first iteration */
1740 sic (sic_cls, NULL, NULL);
1746 * The exported method. Initializes the plugin and returns a
1747 * struct with the callbacks.
1749 * @param cls the plugin's execution environment
1750 * @return NULL on error, plugin functions otherwise
1753 libgnunet_plugin_transport_unix_init (void *cls)
1755 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1756 struct GNUNET_TRANSPORT_PluginFunctions *api;
1757 struct Plugin *plugin;
1758 int sockets_created;
1760 if (NULL == env->receive)
1762 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1763 initialze the plugin or the API */
1764 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1766 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1767 api->address_to_string = &unix_plugin_address_to_string;
1768 api->string_to_address = &unix_plugin_string_to_address;
1772 plugin = GNUNET_new (struct Plugin);
1774 GNUNET_CONFIGURATION_get_value_filename (env->cfg,
1777 &plugin->unix_socket_path))
1779 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1782 GNUNET_free (plugin);
1788 /* Initialize my flags */
1790 plugin->is_abstract = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
1792 "USE_ABSTRACT_SOCKETS");
1794 plugin->myoptions = UNIX_OPTIONS_NONE;
1795 if (GNUNET_YES == plugin->is_abstract)
1796 plugin->myoptions = UNIX_OPTIONS_USE_ABSTRACT_SOCKETS;
1798 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1800 api->get_session = &unix_plugin_get_session;
1801 api->send = &unix_plugin_send;
1802 api->disconnect_peer = &unix_plugin_peer_disconnect;
1803 api->disconnect_session = &unix_plugin_session_disconnect;
1804 api->query_keepalive_factor = &unix_plugin_query_keepalive_factor;
1805 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1806 api->address_to_string = &unix_plugin_address_to_string;
1807 api->check_address = &unix_plugin_check_address;
1808 api->string_to_address = &unix_plugin_string_to_address;
1809 api->get_network = &unix_plugin_get_network;
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 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 (GNUNET_SCHEDULER_NO_TASK != plugin->read_task)
1891 GNUNET_SCHEDULER_cancel (plugin->read_task);
1892 plugin->read_task = GNUNET_SCHEDULER_NO_TASK;
1894 if (GNUNET_SCHEDULER_NO_TASK != plugin->write_task)
1896 GNUNET_SCHEDULER_cancel (plugin->write_task);
1897 plugin->write_task = GNUNET_SCHEDULER_NO_TASK;
1899 if (GNUNET_SCHEDULER_NO_TASK != plugin->address_update_task)
1901 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
1902 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
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 */