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3 Copyright (C) 2010-2014 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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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 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
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 \
72 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
74 #define LOG(kind, ...) GNUNET_log_from (kind, "transport-unix", __VA_ARGS__)
77 GNUNET_NETWORK_STRUCT_BEGIN
80 * Binary format for an UNIX Domain Socket address in GNUnet.
85 * Options to use for the address, in NBO
87 uint32_t options GNUNET_PACKED;
90 * Length of the address (path length), in NBO
92 uint32_t addrlen GNUNET_PACKED;
94 /* followed by actual path */
99 * UNIX Message-Packet header.
106 struct GNUNET_MessageHeader header;
109 * What is the identity of the sender (GNUNET_hash of public key)
111 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
180 * Sessions with pending messages (!) are kept in a DLL.
182 struct GNUNET_ATS_Session *next;
185 * Sessions with pending messages (!) are kept in a DLL.
187 struct GNUNET_ATS_Session *prev;
190 * To whom are we talking to (set to our identity
191 * if we are still waiting for the welcome message).
193 * FIXME: information duplicated with 'peer' in address!
195 struct GNUNET_PeerIdentity target;
198 * Pointer to the global plugin struct.
200 struct Plugin *plugin;
203 * Address of the other peer.
205 struct GNUNET_HELLO_Address *address;
208 * Number of bytes we currently have in our write queue.
210 unsigned long long bytes_in_queue;
213 * Timeout for this session.
215 struct GNUNET_TIME_Absolute timeout;
218 * Session timeout task.
220 struct GNUNET_SCHEDULER_Task *timeout_task;
223 * Number of messages we currently have in our write queue.
225 unsigned int msgs_in_queue;
230 * Encapsulation of all of the state of the plugin.
236 * Information we keep for each of our listen sockets.
238 struct UNIX_Sock_Info
243 struct GNUNET_NETWORK_Handle *desc;
248 * Encapsulation of all of the state of the plugin.
253 * ID of task used to update our addresses when one expires.
255 struct GNUNET_SCHEDULER_Task *address_update_task;
260 struct GNUNET_SCHEDULER_Task *read_task;
265 struct GNUNET_SCHEDULER_Task *write_task;
268 * Number of bytes we currently have in our write queues.
270 unsigned long long bytes_in_queue;
275 struct GNUNET_TRANSPORT_PluginEnvironment *env;
278 * Sessions (map from peer identity to `struct GNUNET_ATS_Session`)
280 struct GNUNET_CONTAINER_MultiPeerMap *session_map;
283 * Head of queue of messages to transmit.
285 struct UNIXMessageWrapper *msg_head;
288 * Tail of queue of messages to transmit.
290 struct UNIXMessageWrapper *msg_tail;
293 * Path of our unix domain socket (/tmp/unix-plugin)
295 char *unix_socket_path;
298 * Function to call about session status changes.
300 GNUNET_TRANSPORT_SessionInfoCallback sic;
303 * Closure for @e sic.
308 * socket that we transmit all data with
310 struct UNIX_Sock_Info unix_sock;
313 * Address options in HBO
318 * Are we using an abstract UNIX domain socket?
325 * If a session monitor is attached, notify it about the new
328 * @param plugin our plugin
329 * @param session session that changed state
330 * @param state new state of the session
333 notify_session_monitor (struct Plugin *plugin,
334 struct GNUNET_ATS_Session *session,
335 enum GNUNET_TRANSPORT_SessionState state)
337 struct GNUNET_TRANSPORT_SessionInfo info;
339 if (NULL == plugin->sic)
341 memset (&info, 0, sizeof(info));
343 info.is_inbound = GNUNET_SYSERR; /* hard to say */
344 info.num_msg_pending = session->msgs_in_queue;
345 info.num_bytes_pending = session->bytes_in_queue;
346 /* info.receive_delay remains zero as this is not supported by UNIX
347 (cannot selectively not receive from 'some' peer while continuing
348 to receive from others) */
349 info.session_timeout = session->timeout;
350 info.address = session->address;
351 plugin->sic (plugin->sic_cls, session, &info);
356 * Function called for a quick conversion of the binary address to
357 * a numeric address. Note that the caller must not free the
358 * address and that the next call to this function is allowed
359 * to override the address again.
362 * @param addr binary address
363 * @param addrlen length of the @a addr
364 * @return string representing the same address
367 unix_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
369 static char rbuf[1024];
370 struct UnixAddress *ua = (struct UnixAddress *) addr;
375 if ((NULL == addr) || (sizeof(struct UnixAddress) > addrlen))
380 addrstr = (char *) &ua[1];
381 addr_str_len = ntohl (ua->addrlen);
383 if (addr_str_len != addrlen - sizeof(struct UnixAddress))
388 if ('\0' != addrstr[addr_str_len - 1])
393 if (strlen (addrstr) + 1 != addr_str_len)
400 if ('\0' == addrstr[0])
402 memset (rbuf, 0, sizeof(rbuf));
403 GNUNET_snprintf (rbuf,
408 (off == 1) ? "@" : "",
409 (int) (addr_str_len - off),
416 * Functions with this signature are called whenever we need
417 * to close a session due to a disconnect or failure to
418 * establish a connection.
420 * @param cls closure with the `struct Plugin *`
421 * @param session session to close down
422 * @return #GNUNET_OK on success
425 unix_plugin_session_disconnect (void *cls, struct GNUNET_ATS_Session *session)
427 struct Plugin *plugin = cls;
428 struct UNIXMessageWrapper *msgw;
429 struct UNIXMessageWrapper *next;
431 LOG (GNUNET_ERROR_TYPE_DEBUG,
432 "Disconnecting session for peer `%s' `%s'\n",
433 GNUNET_i2s (&session->target),
434 unix_plugin_address_to_string (NULL,
435 session->address->address,
436 session->address->address_length));
437 plugin->env->session_end (plugin->env->cls, session->address, session);
438 next = plugin->msg_head;
443 if (msgw->session != session)
445 GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
446 session->msgs_in_queue--;
447 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
448 session->bytes_in_queue -= msgw->msgsize;
449 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
450 plugin->bytes_in_queue -= msgw->msgsize;
451 if (NULL != msgw->cont)
452 msgw->cont (msgw->cont_cls,
453 &msgw->session->target,
457 GNUNET_free (msgw->msg);
460 GNUNET_assert (GNUNET_YES ==
461 GNUNET_CONTAINER_multipeermap_remove (plugin->session_map,
464 GNUNET_STATISTICS_set (plugin->env->stats,
465 "# UNIX sessions active",
466 GNUNET_CONTAINER_multipeermap_size (
467 plugin->session_map),
469 if (NULL != session->timeout_task)
471 GNUNET_SCHEDULER_cancel (session->timeout_task);
472 session->timeout_task = NULL;
473 session->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
475 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_DONE);
476 GNUNET_HELLO_address_free (session->address);
477 GNUNET_break (0 == session->bytes_in_queue);
478 GNUNET_break (0 == session->msgs_in_queue);
479 GNUNET_free (session);
485 * Session was idle for too long, so disconnect it
487 * @param cls the `struct GNUNET_ATS_Session *` to disconnect
490 session_timeout (void *cls)
492 struct GNUNET_ATS_Session *session = cls;
493 struct GNUNET_TIME_Relative left;
495 session->timeout_task = NULL;
496 left = GNUNET_TIME_absolute_get_remaining (session->timeout);
497 if (0 != left.rel_value_us)
499 /* not actually our turn yet, but let's at least update
500 the monitor, it may think we're about to die ... */
501 notify_session_monitor (session->plugin,
503 GNUNET_TRANSPORT_SS_UPDATE);
504 session->timeout_task =
505 GNUNET_SCHEDULER_add_delayed (left, &session_timeout, session);
508 LOG (GNUNET_ERROR_TYPE_DEBUG,
509 "Session %p was idle for %s, disconnecting\n",
511 GNUNET_STRINGS_relative_time_to_string (
512 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
514 unix_plugin_session_disconnect (session->plugin, session);
519 * Increment session timeout due to activity. We do not immediately
520 * notify the monitor here as that might generate excessive
523 * @param session session for which the timeout should be rescheduled
526 reschedule_session_timeout (struct GNUNET_ATS_Session *session)
528 GNUNET_assert (NULL != session->timeout_task);
530 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
535 * Convert unix path to a `struct sockaddr_un *`
537 * @param unixpath path to convert
538 * @param[out] sock_len set to the length of the address
539 * @return converted unix path
541 static struct sockaddr_un *
542 unix_address_to_sockaddr (const char *unixpath, socklen_t *sock_len)
544 struct sockaddr_un *un;
547 GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
548 un = GNUNET_new (struct sockaddr_un);
549 un->sun_family = AF_UNIX;
550 slen = strlen (unixpath);
551 if (slen >= sizeof(un->sun_path))
552 slen = sizeof(un->sun_path) - 1;
553 GNUNET_memcpy (un->sun_path, unixpath, slen);
554 un->sun_path[slen] = '\0';
555 slen = sizeof(struct sockaddr_un);
556 #if HAVE_SOCKADDR_UN_SUN_LEN
557 un->sun_len = (u_char) slen;
565 * Closure to #lookup_session_it().
570 * Location to store the session, if found.
572 struct GNUNET_ATS_Session *res;
575 * Address we are looking for.
577 const struct GNUNET_HELLO_Address *address;
582 * Function called to find a session by address.
584 * @param cls the `struct LookupCtx *`
585 * @param key peer we are looking for (unused)
586 * @param value a session
587 * @return #GNUNET_YES if not found (continue looking), #GNUNET_NO on success
590 lookup_session_it (void *cls,
591 const struct GNUNET_PeerIdentity *key,
594 struct LookupCtx *lctx = cls;
595 struct GNUNET_ATS_Session *session = value;
597 if (0 == GNUNET_HELLO_address_cmp (lctx->address, session->address))
607 * Find an existing session by address.
609 * @param plugin the plugin
610 * @param address the address to find
611 * @return NULL if session was not found
613 static struct GNUNET_ATS_Session *
614 lookup_session (struct Plugin *plugin,
615 const struct GNUNET_HELLO_Address *address)
617 struct LookupCtx lctx;
619 lctx.address = address;
621 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
630 * Function that is called to get the keepalive factor.
631 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
632 * calculate the interval between keepalive packets.
634 * @param cls closure with the `struct Plugin`
635 * @return keepalive factor
638 unix_plugin_query_keepalive_factor (void *cls)
645 * Actually send out the message, assume we've got the address and
646 * send_handle squared away!
649 * @param send_handle which handle to send message on
650 * @param target who should receive this message (ignored by UNIX)
651 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
652 * @param msgbuf_size the size of the @a msgbuf to send
653 * @param priority how important is the message (ignored by UNIX)
654 * @param timeout when should we time out (give up) if we can not transmit?
655 * @param addr the addr to send the message to, needs to be a sockaddr for us
656 * @param addrlen the len of @a addr
657 * @param payload bytes payload to send
658 * @param cont continuation to call once the message has
659 * been transmitted (or if the transport is ready
660 * for the next transmission call; or if the
661 * peer disconnected...)
662 * @param cont_cls closure for @a cont
663 * @return on success the number of bytes written, RETRY for retry, -1 on errors
666 unix_real_send (void *cls,
667 struct GNUNET_NETWORK_Handle *send_handle,
668 const struct GNUNET_PeerIdentity *target,
671 unsigned int priority,
672 struct GNUNET_TIME_Absolute timeout,
673 const struct UnixAddress *addr,
676 GNUNET_TRANSPORT_TransmitContinuation cont,
679 struct Plugin *plugin = cls;
681 struct sockaddr_un *un;
683 const char *unixpath;
685 if (NULL == send_handle)
687 GNUNET_break (0); /* We do not have a send handle */
688 return GNUNET_SYSERR;
690 if ((NULL == addr) || (0 == addrlen))
692 GNUNET_break (0); /* Can never send if we don't have an address */
693 return GNUNET_SYSERR;
696 /* Prepare address */
697 unixpath = (const char *) &addr[1];
698 if (NULL == (un = unix_address_to_sockaddr (unixpath, &un_len)))
704 if ((GNUNET_YES == plugin->is_abstract) &&
705 (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & ntohl (addr->options))))
707 un->sun_path[0] = '\0';
711 sent = GNUNET_NETWORK_socket_sendto (send_handle,
714 (const struct sockaddr *) un,
716 if (GNUNET_SYSERR == sent)
718 if ((EAGAIN == errno) || (ENOBUFS == errno))
721 return RETRY; /* We have to retry later */
723 if (EMSGSIZE == errno)
726 socklen_t len = sizeof(size);
728 GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle *)
734 if (size < msgbuf_size)
736 LOG (GNUNET_ERROR_TYPE_DEBUG,
737 "Trying to increase socket buffer size from %u to %u for message size %u\n",
739 (unsigned int) ((msgbuf_size / 1000) + 2) * 1000,
740 (unsigned int) msgbuf_size);
741 size = ((msgbuf_size / 1000) + 2) * 1000;
743 GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle *)
749 goto resend; /* Increased buffer size, retry sending */
752 /* Could not increase buffer size: error, no retry */
753 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
755 return GNUNET_SYSERR;
760 /* Buffer is bigger than message: error, no retry
761 * This should never happen!*/
764 return GNUNET_SYSERR;
769 LOG (GNUNET_ERROR_TYPE_DEBUG,
770 "UNIX transmitted %u-byte message to %s (%d: %s)\n",
771 (unsigned int) msgbuf_size,
772 GNUNET_a2s ((const struct sockaddr *) un, un_len),
774 (sent < 0) ? strerror (errno) : "ok");
781 * Function obtain the network type for a session
783 * @param cls closure ('struct Plugin*')
784 * @param session the session
785 * @return the network type in HBO or #GNUNET_SYSERR
787 static enum GNUNET_NetworkType
788 unix_plugin_get_network (void *cls, struct GNUNET_ATS_Session *session)
790 GNUNET_assert (NULL != session);
791 return GNUNET_NT_LOOPBACK;
796 * Function obtain the network type for a session
798 * @param cls closure (`struct Plugin *`)
799 * @param address the address
800 * @return the network type
802 static enum GNUNET_NetworkType
803 unix_plugin_get_network_for_address (void *cls,
804 const struct GNUNET_HELLO_Address *address)
806 return GNUNET_NT_LOOPBACK;
811 * Creates a new outbound session the transport service will use to send data to the
814 * @param cls the plugin
815 * @param address the address
816 * @return the session or NULL of max connections exceeded
818 static struct GNUNET_ATS_Session *
819 unix_plugin_get_session (void *cls, const struct GNUNET_HELLO_Address *address)
821 struct Plugin *plugin = cls;
822 struct GNUNET_ATS_Session *session;
823 struct UnixAddress *ua;
825 uint32_t addr_str_len;
826 uint32_t addr_option;
828 ua = (struct UnixAddress *) address->address;
829 if ((NULL == address->address) || (0 == address->address_length) ||
830 (sizeof(struct UnixAddress) > address->address_length))
835 addrstr = (char *) &ua[1];
836 addr_str_len = ntohl (ua->addrlen);
837 addr_option = ntohl (ua->options);
839 if ((0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & addr_option)) &&
840 (GNUNET_NO == plugin->is_abstract))
845 if (addr_str_len != address->address_length - sizeof(struct UnixAddress))
847 return NULL; /* This can be a legacy address */
850 if ('\0' != addrstr[addr_str_len - 1])
855 if (strlen (addrstr) + 1 != addr_str_len)
861 /* Check if a session for this address already exists */
862 if (NULL != (session = lookup_session (plugin, address)))
864 LOG (GNUNET_ERROR_TYPE_DEBUG,
865 "Found existing session %p for address `%s'\n",
867 unix_plugin_address_to_string (NULL,
869 address->address_length));
873 /* create a new session */
874 session = GNUNET_new (struct GNUNET_ATS_Session);
875 session->target = address->peer;
876 session->address = GNUNET_HELLO_address_copy (address);
877 session->plugin = plugin;
879 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
880 session->timeout_task =
881 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
884 LOG (GNUNET_ERROR_TYPE_DEBUG,
885 "Creating a new session %p for address `%s'\n",
887 unix_plugin_address_to_string (NULL,
889 address->address_length));
890 (void) GNUNET_CONTAINER_multipeermap_put (
894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
895 GNUNET_STATISTICS_set (plugin->env->stats,
896 "# UNIX sessions active",
897 GNUNET_CONTAINER_multipeermap_size (
898 plugin->session_map),
900 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_INIT);
901 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UP);
907 * Function that will be called whenever the transport service wants
908 * to notify the plugin that a session is still active and in use and
909 * therefore the session timeout for this session has to be updated
911 * @param cls closure with the `struct Plugin *`
912 * @param peer which peer was the session for
913 * @param session which session is being updated
916 unix_plugin_update_session_timeout (void *cls,
917 const struct GNUNET_PeerIdentity *peer,
918 struct GNUNET_ATS_Session *session)
920 struct Plugin *plugin = cls;
923 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
930 reschedule_session_timeout (session);
935 * Demultiplexer for UNIX messages
937 * @param plugin the main plugin for this transport
938 * @param sender from which peer the message was received
939 * @param currhdr pointer to the header of the message
940 * @param ua address to look for
941 * @param ua_len length of the address @a ua
944 unix_demultiplexer (struct Plugin *plugin,
945 struct GNUNET_PeerIdentity *sender,
946 const struct GNUNET_MessageHeader *currhdr,
947 const struct UnixAddress *ua,
950 struct GNUNET_ATS_Session *session;
951 struct GNUNET_HELLO_Address *address;
953 GNUNET_assert (ua_len >= sizeof(struct UnixAddress));
954 LOG (GNUNET_ERROR_TYPE_DEBUG,
955 "Received message from %s\n",
956 unix_plugin_address_to_string (NULL, ua, ua_len));
957 GNUNET_STATISTICS_update (plugin->env->stats,
958 "# bytes received via UNIX",
959 ntohs (currhdr->size),
962 /* Look for existing session */
963 address = GNUNET_HELLO_address_allocate (
968 GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
969 session = lookup_session (plugin, address);
972 session = unix_plugin_get_session (plugin, address);
973 /* Notify transport and ATS about new inbound session */
974 plugin->env->session_start (NULL,
981 reschedule_session_timeout (session);
983 GNUNET_HELLO_address_free (address);
984 plugin->env->receive (plugin->env->cls, session->address, session, currhdr);
989 * Read from UNIX domain socket (it is ready).
991 * @param plugin the plugin
994 unix_plugin_do_read (struct Plugin *plugin)
996 char buf[65536] GNUNET_ALIGN;
997 struct UnixAddress *ua;
998 struct UNIXMessage *msg;
999 struct GNUNET_PeerIdentity sender;
1000 struct sockaddr_un un;
1007 const struct GNUNET_MessageHeader *currhdr;
1011 addrlen = sizeof(un);
1012 memset (&un, 0, sizeof(un));
1013 ret = GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc,
1016 (struct sockaddr *) &un,
1018 if ((GNUNET_SYSERR == ret) && ((errno == EAGAIN) || (errno == ENOBUFS)))
1020 if (GNUNET_SYSERR == ret)
1022 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "recvfrom");
1027 LOG (GNUNET_ERROR_TYPE_DEBUG,
1028 "Read %d bytes from socket %s\n",
1033 GNUNET_assert (AF_UNIX == (un.sun_family));
1034 is_abstract = GNUNET_NO;
1035 if ('\0' == un.sun_path[0])
1037 un.sun_path[0] = '@';
1038 is_abstract = GNUNET_YES;
1041 ua_len = sizeof(struct UnixAddress) + strlen (un.sun_path) + 1;
1042 ua = GNUNET_malloc (ua_len);
1043 ua->addrlen = htonl (strlen (&un.sun_path[0]) + 1);
1044 GNUNET_memcpy (&ua[1], &un.sun_path[0], strlen (un.sun_path) + 1);
1046 ua->options = htonl (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS);
1048 ua->options = htonl (UNIX_OPTIONS_NONE);
1050 msg = (struct UNIXMessage *) buf;
1051 csize = ntohs (msg->header.size);
1052 if ((csize < sizeof(struct UNIXMessage)) || (csize > ret))
1054 GNUNET_break_op (0);
1058 msgbuf = (char *) &msg[1];
1059 GNUNET_memcpy (&sender, &msg->sender, sizeof(struct GNUNET_PeerIdentity));
1061 tsize = csize - sizeof(struct UNIXMessage);
1062 while (offset + sizeof(struct GNUNET_MessageHeader) <= tsize)
1064 currhdr = (struct GNUNET_MessageHeader *) &msgbuf[offset];
1065 csize = ntohs (currhdr->size);
1066 if ((csize < sizeof(struct GNUNET_MessageHeader)) ||
1067 (csize > tsize - offset))
1069 GNUNET_break_op (0);
1072 unix_demultiplexer (plugin, &sender, currhdr, ua, ua_len);
1080 * Write to UNIX domain socket (it is ready).
1082 * @param plugin handle to the plugin
1085 unix_plugin_do_write (struct Plugin *plugin)
1088 struct UNIXMessageWrapper *msgw;
1089 struct GNUNET_ATS_Session *session;
1093 did_delete = GNUNET_NO;
1094 while (NULL != (msgw = plugin->msg_head))
1096 if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value_us > 0)
1097 break; /* Message is ready for sending */
1098 /* Message has a timeout */
1099 did_delete = GNUNET_YES;
1100 LOG (GNUNET_ERROR_TYPE_DEBUG,
1101 "Timeout for message with %u bytes \n",
1102 (unsigned int) msgw->msgsize);
1103 GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
1104 session = msgw->session;
1105 session->msgs_in_queue--;
1106 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1107 session->bytes_in_queue -= msgw->msgsize;
1108 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1109 plugin->bytes_in_queue -= msgw->msgsize;
1110 GNUNET_STATISTICS_set (plugin->env->stats,
1111 "# bytes currently in UNIX buffers",
1112 plugin->bytes_in_queue,
1114 GNUNET_STATISTICS_update (plugin->env->stats,
1115 "# UNIX bytes discarded",
1118 if (NULL != msgw->cont)
1119 msgw->cont (msgw->cont_cls,
1120 &msgw->session->target,
1124 GNUNET_free (msgw->msg);
1129 if (GNUNET_YES == did_delete)
1130 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UPDATE);
1131 return; /* Nothing to send at the moment */
1133 session = msgw->session;
1134 sent = unix_real_send (plugin,
1135 plugin->unix_sock.desc,
1137 (const char *) msgw->msg,
1141 msgw->session->address->address,
1142 msgw->session->address->address_length,
1148 GNUNET_STATISTICS_update (plugin->env->stats,
1149 "# UNIX retry attempts",
1152 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UPDATE);
1155 GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
1156 session->msgs_in_queue--;
1157 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1158 session->bytes_in_queue -= msgw->msgsize;
1159 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1160 plugin->bytes_in_queue -= msgw->msgsize;
1161 GNUNET_STATISTICS_set (plugin->env->stats,
1162 "# bytes currently in UNIX buffers",
1163 plugin->bytes_in_queue,
1165 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UPDATE);
1166 if (GNUNET_SYSERR == sent)
1168 /* failed and no retry */
1169 if (NULL != msgw->cont)
1170 msgw->cont (msgw->cont_cls,
1171 &msgw->session->target,
1175 GNUNET_STATISTICS_update (plugin->env->stats,
1176 "# UNIX bytes discarded",
1179 GNUNET_free (msgw->msg);
1183 /* successfully sent bytes */
1184 GNUNET_break (sent > 0);
1185 GNUNET_STATISTICS_update (plugin->env->stats,
1186 "# bytes transmitted via UNIX",
1189 if (NULL != msgw->cont)
1190 msgw->cont (msgw->cont_cls,
1191 &msgw->session->target,
1195 GNUNET_free (msgw->msg);
1201 * We have been notified that our socket has something to read.
1202 * Then reschedule this function to be called again once more is available.
1204 * @param cls the plugin handle
1207 unix_plugin_select_read (void *cls)
1209 struct Plugin *plugin = cls;
1210 const struct GNUNET_SCHEDULER_TaskContext *tc;
1212 plugin->read_task = NULL;
1213 tc = GNUNET_SCHEDULER_get_task_context ();
1214 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1215 unix_plugin_do_read (plugin);
1217 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1218 plugin->unix_sock.desc,
1219 &unix_plugin_select_read,
1225 * We have been notified that our socket is ready to write.
1226 * Then reschedule this function to be called again once more is available.
1228 * @param cls the plugin handle
1231 unix_plugin_select_write (void *cls)
1233 struct Plugin *plugin = cls;
1234 const struct GNUNET_SCHEDULER_TaskContext *tc;
1236 plugin->write_task = NULL;
1237 tc = GNUNET_SCHEDULER_get_task_context ();
1238 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
1239 unix_plugin_do_write (plugin);
1240 if (NULL == plugin->msg_head)
1241 return; /* write queue empty */
1242 plugin->write_task =
1243 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1244 plugin->unix_sock.desc,
1245 &unix_plugin_select_write,
1251 * Function that can be used by the transport service to transmit
1252 * a message using the plugin. Note that in the case of a
1253 * peer disconnecting, the continuation MUST be called
1254 * prior to the disconnect notification itself. This function
1255 * will be called with this peer's HELLO message to initiate
1256 * a fresh connection to another peer.
1258 * @param cls closure
1259 * @param session which session must be used
1260 * @param msgbuf the message to transmit
1261 * @param msgbuf_size number of bytes in @a msgbuf
1262 * @param priority how important is the message (most plugins will
1263 * ignore message priority and just FIFO)
1264 * @param to how long to wait at most for the transmission (does not
1265 * require plugins to discard the message after the timeout,
1266 * just advisory for the desired delay; most plugins will ignore
1268 * @param cont continuation to call once the message has
1269 * been transmitted (or if the transport is ready
1270 * for the next transmission call; or if the
1271 * peer disconnected...); can be NULL
1272 * @param cont_cls closure for @a cont
1273 * @return number of bytes used (on the physical network, with overheads);
1274 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1275 * and does NOT mean that the message was not transmitted (DV)
1278 unix_plugin_send (void *cls,
1279 struct GNUNET_ATS_Session *session,
1282 unsigned int priority,
1283 struct GNUNET_TIME_Relative to,
1284 GNUNET_TRANSPORT_TransmitContinuation cont,
1287 struct Plugin *plugin = cls;
1288 struct UNIXMessageWrapper *wrapper;
1289 struct UNIXMessage *message;
1293 GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
1297 LOG (GNUNET_ERROR_TYPE_ERROR,
1298 "Invalid session for peer `%s' `%s'\n",
1299 GNUNET_i2s (&session->target),
1300 unix_plugin_address_to_string (NULL,
1301 session->address->address,
1302 session->address->address_length));
1304 return GNUNET_SYSERR;
1306 LOG (GNUNET_ERROR_TYPE_DEBUG,
1307 "Sending %u bytes with session for peer `%s' `%s'\n",
1309 GNUNET_i2s (&session->target),
1310 unix_plugin_address_to_string (NULL,
1311 session->address->address,
1312 session->address->address_length));
1313 ssize = sizeof(struct UNIXMessage) + msgbuf_size;
1314 message = GNUNET_malloc (sizeof(struct UNIXMessage) + msgbuf_size);
1315 message->header.size = htons (ssize);
1316 message->header.type = htons (0);
1317 GNUNET_memcpy (&message->sender,
1318 plugin->env->my_identity,
1319 sizeof(struct GNUNET_PeerIdentity));
1320 GNUNET_memcpy (&message[1], msgbuf, msgbuf_size);
1321 wrapper = GNUNET_new (struct UNIXMessageWrapper);
1322 wrapper->msg = message;
1323 wrapper->msgsize = ssize;
1324 wrapper->payload = msgbuf_size;
1325 wrapper->priority = priority;
1326 wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), to);
1327 wrapper->cont = cont;
1328 wrapper->cont_cls = cont_cls;
1329 wrapper->session = session;
1330 GNUNET_CONTAINER_DLL_insert_tail (plugin->msg_head,
1333 plugin->bytes_in_queue += ssize;
1334 session->bytes_in_queue += ssize;
1335 session->msgs_in_queue++;
1336 GNUNET_STATISTICS_set (plugin->env->stats,
1337 "# bytes currently in UNIX buffers",
1338 plugin->bytes_in_queue,
1340 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UPDATE);
1341 if (NULL == plugin->write_task)
1342 plugin->write_task =
1343 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1344 plugin->unix_sock.desc,
1345 &unix_plugin_select_write,
1352 * Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
1354 * @param cls closure for server start, should be a `struct Plugin *`
1355 * @return number of sockets created or #GNUNET_SYSERR on error
1358 unix_transport_server_start (void *cls)
1360 struct Plugin *plugin = cls;
1361 struct sockaddr_un *un;
1364 un = unix_address_to_sockaddr (plugin->unix_socket_path, &un_len);
1365 if (GNUNET_YES == plugin->is_abstract)
1367 plugin->unix_socket_path[0] = '@';
1368 un->sun_path[0] = '\0';
1370 plugin->unix_sock.desc =
1371 GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
1372 if (NULL == plugin->unix_sock.desc)
1374 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1376 return GNUNET_SYSERR;
1378 if ('\0' != un->sun_path[0])
1380 if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (un->sun_path))
1382 LOG (GNUNET_ERROR_TYPE_ERROR,
1383 _ ("Cannot create path to `%s'\n"),
1385 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1386 plugin->unix_sock.desc = NULL;
1388 return GNUNET_SYSERR;
1391 if (GNUNET_OK != GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc,
1392 (const struct sockaddr *) un,
1395 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
1396 LOG (GNUNET_ERROR_TYPE_ERROR, _ ("Cannot bind to `%s'\n"), un->sun_path);
1397 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
1398 plugin->unix_sock.desc = NULL;
1400 return GNUNET_SYSERR;
1402 LOG (GNUNET_ERROR_TYPE_DEBUG, "Bound to `%s'\n", plugin->unix_socket_path);
1404 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1405 plugin->unix_sock.desc,
1406 &unix_plugin_select_read,
1414 * Function that will be called to check if a binary address for this
1415 * plugin is well-formed and corresponds to an address for THIS peer
1416 * (as per our configuration). Naturally, if absolutely necessary,
1417 * plugins can be a bit conservative in their answer, but in general
1418 * plugins should make sure that the address does not redirect
1419 * traffic to a 3rd party that might try to man-in-the-middle our
1422 * @param cls closure, should be our handle to the Plugin
1423 * @param addr pointer to the address
1424 * @param addrlen length of @a addr
1425 * @return #GNUNET_OK if this is a plausible address for this peer
1426 * and transport, #GNUNET_SYSERR if not
1430 unix_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1432 struct Plugin *plugin = cls;
1433 const struct UnixAddress *ua = addr;
1435 size_t addr_str_len;
1437 if ((NULL == addr) || (0 == addrlen) ||
1438 (sizeof(struct UnixAddress) > addrlen))
1441 return GNUNET_SYSERR;
1443 addrstr = (char *) &ua[1];
1444 addr_str_len = ntohl (ua->addrlen);
1445 if ('\0' != addrstr[addr_str_len - 1])
1448 return GNUNET_SYSERR;
1450 if (strlen (addrstr) + 1 != addr_str_len)
1453 return GNUNET_SYSERR;
1456 if (0 == strcmp (plugin->unix_socket_path, addrstr))
1458 return GNUNET_SYSERR;
1463 * Convert the transports address to a nice, human-readable
1466 * @param cls closure
1467 * @param type name of the transport that generated the address
1468 * @param addr one of the addresses of the host, NULL for the last address
1469 * the specific address format depends on the transport
1470 * @param addrlen length of the @a addr
1471 * @param numeric should (IP) addresses be displayed in numeric form?
1472 * @param timeout after how long should we give up?
1473 * @param asc function to call on each string
1474 * @param asc_cls closure for @a asc
1477 unix_plugin_address_pretty_printer (void *cls,
1482 struct GNUNET_TIME_Relative timeout,
1483 GNUNET_TRANSPORT_AddressStringCallback asc,
1488 if ((NULL != addr) && (addrlen > 0))
1489 ret = unix_plugin_address_to_string (NULL, addr, addrlen);
1492 asc (asc_cls, ret, (NULL == ret) ? GNUNET_SYSERR : GNUNET_OK);
1493 asc (asc_cls, NULL, GNUNET_OK);
1498 * Function called to convert a string address to
1501 * @param cls closure (`struct Plugin *`)
1502 * @param addr string address
1503 * @param addrlen length of the @a addr (strlen(addr) + '\0')
1504 * @param buf location to store the buffer
1505 * If the function returns #GNUNET_SYSERR, its contents are undefined.
1506 * @param added length of created address
1507 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1510 unix_plugin_string_to_address (void *cls,
1516 struct UnixAddress *ua;
1523 /* Format unix.options.address */
1528 if ((NULL == addr) || (addrlen == 0))
1531 return GNUNET_SYSERR;
1533 if ('\0' != addr[addrlen - 1])
1536 return GNUNET_SYSERR;
1538 if (strlen (addr) != addrlen - 1)
1541 return GNUNET_SYSERR;
1543 plugin = GNUNET_strdup (addr);
1544 optionstr = strchr (plugin, '.');
1545 if (NULL == optionstr)
1548 GNUNET_free (plugin);
1549 return GNUNET_SYSERR;
1551 optionstr[0] = '\0';
1553 options = atol (optionstr);
1554 address = strchr (optionstr, '.');
1555 if (NULL == address)
1558 GNUNET_free (plugin);
1559 return GNUNET_SYSERR;
1563 if (0 != strcmp (plugin, PLUGIN_NAME))
1566 GNUNET_free (plugin);
1567 return GNUNET_SYSERR;
1570 ua_size = sizeof(struct UnixAddress) + strlen (address) + 1;
1571 ua = GNUNET_malloc (ua_size);
1572 ua->options = htonl (options);
1573 ua->addrlen = htonl (strlen (address) + 1);
1574 GNUNET_memcpy (&ua[1], address, strlen (address) + 1);
1575 GNUNET_free (plugin);
1584 * Notify transport service about address
1586 * @param cls the plugin
1589 address_notification (void *cls)
1591 struct Plugin *plugin = cls;
1592 struct GNUNET_HELLO_Address *address;
1594 struct UnixAddress *ua;
1597 len = sizeof(struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1598 ua = GNUNET_malloc (len);
1599 ua->options = htonl (plugin->myoptions);
1600 ua->addrlen = htonl (strlen (plugin->unix_socket_path) + 1);
1601 unix_path = (char *) &ua[1];
1602 GNUNET_memcpy (unix_path,
1603 plugin->unix_socket_path,
1604 strlen (plugin->unix_socket_path) + 1);
1606 plugin->address_update_task = NULL;
1607 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1611 GNUNET_HELLO_ADDRESS_INFO_NONE);
1612 plugin->env->notify_address (plugin->env->cls, GNUNET_YES, address);
1614 GNUNET_free (address);
1619 * Function called on sessions to disconnect
1621 * @param cls the plugin
1622 * @param key peer identity (unused)
1623 * @param value the `struct GNUNET_ATS_Session *` to disconnect
1624 * @return #GNUNET_YES (always, continue to iterate)
1627 get_session_delete_it (void *cls,
1628 const struct GNUNET_PeerIdentity *key,
1631 struct Plugin *plugin = cls;
1632 struct GNUNET_ATS_Session *session = value;
1634 unix_plugin_session_disconnect (plugin, session);
1640 * Disconnect from a remote node. Clean up session if we have one for this peer
1642 * @param cls closure for this call (should be handle to Plugin)
1643 * @param target the peeridentity of the peer to disconnect
1644 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1647 unix_plugin_peer_disconnect (void *cls,
1648 const struct GNUNET_PeerIdentity *target)
1650 struct Plugin *plugin = cls;
1652 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->session_map,
1654 &get_session_delete_it,
1660 * Return information about the given session to the
1663 * @param cls the `struct Plugin` with the monitor callback (`sic`)
1664 * @param peer peer we send information about
1665 * @param value our `struct GNUNET_ATS_Session` to send information about
1666 * @return #GNUNET_OK (continue to iterate)
1669 send_session_info_iter (void *cls,
1670 const struct GNUNET_PeerIdentity *peer,
1673 struct Plugin *plugin = cls;
1674 struct GNUNET_ATS_Session *session = value;
1676 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_INIT);
1677 notify_session_monitor (plugin, session, GNUNET_TRANSPORT_SS_UP);
1683 * Begin monitoring sessions of a plugin. There can only
1684 * be one active monitor per plugin (i.e. if there are
1685 * multiple monitors, the transport service needs to
1686 * multiplex the generated events over all of them).
1688 * @param cls closure of the plugin
1689 * @param sic callback to invoke, NULL to disable monitor;
1690 * plugin will being by iterating over all active
1691 * sessions immediately and then enter monitor mode
1692 * @param sic_cls closure for @a sic
1695 unix_plugin_setup_monitor (void *cls,
1696 GNUNET_TRANSPORT_SessionInfoCallback sic,
1699 struct Plugin *plugin = cls;
1702 plugin->sic_cls = sic_cls;
1705 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1706 &send_session_info_iter,
1708 /* signal end of first iteration */
1709 sic (sic_cls, NULL, NULL);
1715 * The exported method. Initializes the plugin and returns a
1716 * struct with the callbacks.
1718 * @param cls the plugin's execution environment
1719 * @return NULL on error, plugin functions otherwise
1722 libgnunet_plugin_transport_unix_init (void *cls)
1724 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1725 struct GNUNET_TRANSPORT_PluginFunctions *api;
1726 struct Plugin *plugin;
1727 int sockets_created;
1729 if (NULL == env->receive)
1731 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1732 initialze the plugin or the API */
1733 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1735 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1736 api->address_to_string = &unix_plugin_address_to_string;
1737 api->string_to_address = &unix_plugin_string_to_address;
1741 plugin = GNUNET_new (struct Plugin);
1743 GNUNET_CONFIGURATION_get_value_filename (env->cfg,
1746 &plugin->unix_socket_path))
1748 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1751 GNUNET_free (plugin);
1757 /* Initialize my flags */
1759 plugin->is_abstract =
1760 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
1762 "USE_ABSTRACT_SOCKETS");
1764 plugin->myoptions = UNIX_OPTIONS_NONE;
1765 if (GNUNET_YES == plugin->is_abstract)
1766 plugin->myoptions = UNIX_OPTIONS_USE_ABSTRACT_SOCKETS;
1768 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1770 api->get_session = &unix_plugin_get_session;
1771 api->send = &unix_plugin_send;
1772 api->disconnect_peer = &unix_plugin_peer_disconnect;
1773 api->disconnect_session = &unix_plugin_session_disconnect;
1774 api->query_keepalive_factor = &unix_plugin_query_keepalive_factor;
1775 api->address_pretty_printer = &unix_plugin_address_pretty_printer;
1776 api->address_to_string = &unix_plugin_address_to_string;
1777 api->check_address = &unix_plugin_check_address;
1778 api->string_to_address = &unix_plugin_string_to_address;
1779 api->get_network = &unix_plugin_get_network;
1780 api->get_network_for_address = &unix_plugin_get_network_for_address;
1781 api->update_session_timeout = &unix_plugin_update_session_timeout;
1782 api->setup_monitor = &unix_plugin_setup_monitor;
1783 sockets_created = unix_transport_server_start (plugin);
1784 if ((0 == sockets_created) || (GNUNET_SYSERR == sockets_created))
1786 LOG (GNUNET_ERROR_TYPE_WARNING, _ ("Failed to open UNIX listen socket\n"));
1788 GNUNET_free (plugin->unix_socket_path);
1789 GNUNET_free (plugin);
1792 plugin->session_map = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
1793 plugin->address_update_task =
1794 GNUNET_SCHEDULER_add_now (&address_notification, plugin);
1800 * Shutdown the plugin.
1802 * @param cls the plugin API returned from the initialization function
1803 * @return NULL (always)
1806 libgnunet_plugin_transport_unix_done (void *cls)
1808 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1809 struct Plugin *plugin = api->cls;
1810 struct GNUNET_HELLO_Address *address;
1811 struct UNIXMessageWrapper *msgw;
1812 struct UnixAddress *ua;
1814 struct GNUNET_ATS_Session *session;
1821 len = sizeof(struct UnixAddress) + strlen (plugin->unix_socket_path) + 1;
1822 ua = GNUNET_malloc (len);
1823 ua->options = htonl (plugin->myoptions);
1824 ua->addrlen = htonl (strlen (plugin->unix_socket_path) + 1);
1825 GNUNET_memcpy (&ua[1],
1826 plugin->unix_socket_path,
1827 strlen (plugin->unix_socket_path) + 1);
1828 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1832 GNUNET_HELLO_ADDRESS_INFO_NONE);
1833 plugin->env->notify_address (plugin->env->cls, GNUNET_NO, address);
1835 GNUNET_free (address);
1838 while (NULL != (msgw = plugin->msg_head))
1840 GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
1841 session = msgw->session;
1842 session->msgs_in_queue--;
1843 GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
1844 session->bytes_in_queue -= msgw->msgsize;
1845 GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
1846 plugin->bytes_in_queue -= msgw->msgsize;
1847 if (NULL != msgw->cont)
1848 msgw->cont (msgw->cont_cls,
1849 &msgw->session->target,
1853 GNUNET_free (msgw->msg);
1857 if (NULL != plugin->read_task)
1859 GNUNET_SCHEDULER_cancel (plugin->read_task);
1860 plugin->read_task = NULL;
1862 if (NULL != plugin->write_task)
1864 GNUNET_SCHEDULER_cancel (plugin->write_task);
1865 plugin->write_task = NULL;
1867 if (NULL != plugin->address_update_task)
1869 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
1870 plugin->address_update_task = NULL;
1872 if (NULL != plugin->unix_sock.desc)
1874 GNUNET_break (GNUNET_OK ==
1875 GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
1876 plugin->unix_sock.desc = NULL;
1878 GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
1879 &get_session_delete_it,
1881 GNUNET_CONTAINER_multipeermap_destroy (plugin->session_map);
1882 GNUNET_break (0 == plugin->bytes_in_queue);
1883 GNUNET_free (plugin->unix_socket_path);
1884 GNUNET_free (plugin);
1890 /* end of plugin_transport_unix.c */