2 This file is part of GNUnet
3 (C) 2010, 2011, 2012 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_bluetooth.c
23 * @brief transport plugin for bluetooth
24 * @author David Brodski
25 * @author Christian Grothoff
27 * THIS IS A COPY OF plugin_transport_wlan.c
30 #include "gnunet_hello_lib.h"
31 #include "gnunet_protocols.h"
32 #include "gnunet_util_lib.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_transport_service.h"
35 #include "gnunet_transport_plugin.h"
36 #include "plugin_transport_wlan.h"
37 #include "gnunet_common.h"
38 #include "gnunet_crypto_lib.h"
39 #include "gnunet_fragmentation_lib.h"
40 #include "gnunet_constants.h"
46 #define LOG(kind,...) GNUNET_log_from (kind, "transport-bluetooth",__VA_ARGS__)
48 #define PLUGIN_NAME "bluetooth"
51 * Max size of packet (that we give to the WLAN driver for transmission)
56 * time out of a mac endpoint
58 #define MACENDPOINT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, 60)
61 * We reduce the frequence of HELLO beacons in relation to
62 * the number of MAC addresses currently visible to us.
63 * This is the multiplication factor.
65 #define HELLO_BEACON_SCALING_FACTOR GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60)
68 * Maximum number of messages in defragmentation queue per MAC
70 #define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 2
73 * Link layer control fields for better compatibility
74 * (i.e. GNUnet over WLAN is not IP-over-WLAN).
76 #define WLAN_LLC_DSAP_FIELD 0x1f
77 #define WLAN_LLC_SSAP_FIELD 0x1f
80 GNUNET_NETWORK_STRUCT_BEGIN
82 * Header for messages which need fragmentation. This is the format of
83 * a message we obtain AFTER defragmentation. We then need to check
84 * the CRC and then tokenize the payload and pass it to the
91 * Message type is GNUNET_MESSAGE_TYPE_WLAN_DATA.
93 struct GNUNET_MessageHeader header;
96 * CRC32 checksum (only over the payload), in NBO.
98 uint32_t crc GNUNET_PACKED;
101 * Sender of the message.
103 struct GNUNET_PeerIdentity sender;
106 * Target of the message.
108 struct GNUNET_PeerIdentity target;
110 /* followed by payload, possibly including
111 multiple messages! */
118 uint32_t options GNUNET_PACKED;
120 struct GNUNET_TRANSPORT_WLAN_MacAddress mac;
124 GNUNET_NETWORK_STRUCT_END
128 * Information kept for each message that is yet to be fragmented and
131 struct PendingMessage
134 * next entry in the DLL
136 struct PendingMessage *next;
139 * previous entry in the DLL
141 struct PendingMessage *prev;
144 * The pending message
146 struct WlanHeader *msg;
149 * Continuation function to call once the message
150 * has been sent. Can be NULL if there is no
151 * continuation to call.
153 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
156 * Cls for transmit_cont
158 void *transmit_cont_cls;
161 * Timeout task (for this message).
163 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
169 * Session handle for connections with other peers.
174 * To whom are we talking to (set to our identity
175 * if we are still waiting for the welcome message)
177 struct GNUNET_PeerIdentity target;
180 * API requirement (must be first).
182 struct SessionHeader header;
185 * We keep all sessions in a DLL at their respective
186 * 'struct MACEndpoint'.
188 struct Session *next;
191 * We keep all sessions in a DLL at their respective
192 * 'struct MACEndpoint'.
194 struct Session *prev;
197 * MAC endpoint with the address of this peer.
199 struct MacEndpoint *mac;
202 * The address for this session
204 struct GNUNET_HELLO_Address *address;
207 * Head of messages currently pending for transmission to this peer.
209 struct PendingMessage *pending_message_head;
212 * Tail of messages currently pending for transmission to this peer.
214 struct PendingMessage *pending_message_tail;
217 * When should this session time out?
219 struct GNUNET_TIME_Absolute timeout;
222 * Timeout task (for the session).
224 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
230 * Struct for messages that are being fragmented in a MAC's transmission queue.
232 struct FragmentMessage
236 * This is a doubly-linked list.
238 struct FragmentMessage *next;
241 * This is a doubly-linked list.
243 struct FragmentMessage *prev;
246 * MAC endpoint this message belongs to
248 struct MacEndpoint *macendpoint;
251 * Fragmentation context
253 struct GNUNET_FRAGMENT_Context *fragcontext;
256 * Transmission handle to helper (to cancel if the frag context
257 * is destroyed early for some reason).
259 struct GNUNET_HELPER_SendHandle *sh;
262 * Intended recipient.
264 struct GNUNET_PeerIdentity target;
267 * Timeout value for the message.
269 struct GNUNET_TIME_Absolute timeout;
274 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
277 * Continuation to call when we're done with this message.
279 GNUNET_TRANSPORT_TransmitContinuation cont;
287 * Size of original message
292 * Number of bytes used to transmit message
300 * Struct to represent one network card connection
306 * We keep all MACs in a DLL in the plugin.
308 struct MacEndpoint *next;
311 * We keep all MACs in a DLL in the plugin.
313 struct MacEndpoint *prev;
316 * Pointer to the global plugin struct.
318 struct Plugin *plugin;
321 * Head of sessions that use this MAC.
323 struct Session *sessions_head;
326 * Tail of sessions that use this MAC.
328 struct Session *sessions_tail;
331 * Head of messages we are currently sending to this MAC.
333 struct FragmentMessage *sending_messages_head;
336 * Tail of messages we are currently sending to this MAC.
338 struct FragmentMessage *sending_messages_tail;
341 * Defrag context for this MAC
343 struct GNUNET_DEFRAGMENT_Context *defrag;
346 * When should this endpoint time out?
348 struct GNUNET_TIME_Absolute timeout;
353 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
356 * count of messages in the fragment out queue for this mac endpoint
358 unsigned int fragment_messages_out_count;
363 struct WlanAddress addr;
366 * Message delay for fragmentation context
368 struct GNUNET_TIME_Relative msg_delay;
371 * ACK delay for fragmentation context
373 struct GNUNET_TIME_Relative ack_delay;
376 * Desired transmission power for this MAC
381 * Desired transmission rate for this MAC
386 * Antenna we should use for this MAC
394 * Encapsulation of all of the state of the plugin.
401 struct GNUNET_TRANSPORT_PluginEnvironment *env;
404 * Handle to helper process for priviledged operations.
406 struct GNUNET_HELPER_Handle *suid_helper;
409 * ARGV-vector for the helper (all helpers take only the binary
410 * name, one actual argument, plus the NULL terminator for 'argv').
412 char * helper_argv[3];
415 * The interface of the wlan card given to us by the user.
420 * Tokenizer for demultiplexing of data packets resulting from defragmentation.
422 struct GNUNET_SERVER_MessageStreamTokenizer *fragment_data_tokenizer;
425 * Tokenizer for demultiplexing of data packets received from the suid helper
427 struct GNUNET_SERVER_MessageStreamTokenizer *helper_payload_tokenizer;
430 * Tokenizer for demultiplexing of data packets that follow the WLAN Header
432 struct GNUNET_SERVER_MessageStreamTokenizer *wlan_header_payload_tokenizer;
435 * Head of list of open connections.
437 struct MacEndpoint *mac_head;
440 * Tail of list of open connections.
442 struct MacEndpoint *mac_tail;
445 * Number of connections
447 unsigned int mac_count;
450 * Task that periodically sends a HELLO beacon via the helper.
452 GNUNET_SCHEDULER_TaskIdentifier beacon_task;
455 * Tracker for bandwidth limit
457 struct GNUNET_BANDWIDTH_Tracker tracker;
460 * The mac_address of the wlan card given to us by the helper.
462 struct GNUNET_TRANSPORT_WLAN_MacAddress mac_address;
465 * Have we received a control message with our MAC address yet?
470 * Options for addresses
478 * Information associated with a message. Can contain
479 * the session or the MAC endpoint associated with the
485 * NULL if the identity of the other peer is not known.
487 struct Session *session;
490 * MAC address of the other peer, NULL if not known.
492 struct MacEndpoint *endpoint;
496 * Function called for a quick conversion of the binary address to
497 * a numeric address. Note that the caller must not free the
498 * address and that the next call to this function is allowed
499 * to override the address again.
502 * @param addr binary address
503 * @param addrlen length of the address
504 * @return string representing the same address
507 bluetooth_plugin_address_to_string (void *cls, const void *addr, size_t addrlen);
510 * Print MAC addresses nicely.
512 * @param mac the mac address
513 * @return string to a static buffer with the human-readable mac, will be overwritten during the next call to this function
516 mac_to_string (const struct GNUNET_TRANSPORT_WLAN_MacAddress * mac)
518 static char macstr[20];
520 GNUNET_snprintf (macstr, sizeof (macstr), "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
521 mac->mac[0], mac->mac[1],
522 mac->mac[2], mac->mac[3], mac->mac[4], mac->mac[5]);
528 * Fill the radiotap header
530 * @param endpoint pointer to the endpoint, can be NULL
531 * @param header pointer to the radiotap header
532 * @param size total message size
535 get_radiotap_header (struct MacEndpoint *endpoint,
536 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header,
539 header->header.type = ntohs (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER);
540 header->header.size = ntohs (size);
541 if (NULL != endpoint)
543 header->rate = endpoint->rate;
544 header->tx_power = endpoint->tx_power;
545 header->antenna = endpoint->antenna;
550 header->tx_power = 0;
557 * Generate the WLAN hardware header for one packet
559 * @param plugin the plugin handle
560 * @param header address to write the header to
561 * @param to_mac_addr address of the recipient
562 * @param size size of the whole packet, needed to calculate the time to send the packet
565 get_wlan_header (struct Plugin *plugin,
566 struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *header,
567 const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr,
570 const int rate = 11000000;
572 header->frame_control = htons (IEEE80211_FC0_TYPE_DATA);
573 header->addr1 = *to_mac_addr;
574 header->addr2 = plugin->mac_address;
575 header->addr3 = mac_bssid_gnunet;
576 header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290);
577 header->sequence_control = 0; // FIXME?
578 header->llc[0] = WLAN_LLC_DSAP_FIELD;
579 header->llc[1] = WLAN_LLC_SSAP_FIELD;
580 header->llc[2] = 0; // FIXME?
581 header->llc[3] = 0; // FIXME?
586 * Send an ACK for a fragment we received.
588 * @param cls the 'struct MacEndpoint' the ACK must be sent to
589 * @param msg_id id of the message
590 * @param hdr pointer to the hdr where the ack is stored
593 send_ack (void *cls, uint32_t msg_id,
594 const struct GNUNET_MessageHeader *hdr)
596 struct MacEndpoint *endpoint = cls;
597 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage* radio_header;
598 uint16_t msize = ntohs (hdr->size);
599 size_t size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize;
602 if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
607 LOG (GNUNET_ERROR_TYPE_DEBUG,
608 "Sending ACK to helper\n");
609 radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf;
610 get_radiotap_header (endpoint, radio_header, size);
611 get_wlan_header (endpoint->plugin,
612 &radio_header->frame,
614 sizeof (endpoint->addr.mac));
615 memcpy (&radio_header[1], hdr, msize);
617 GNUNET_HELPER_send (endpoint->plugin->suid_helper,
618 &radio_header->header,
619 GNUNET_NO /* dropping ACKs is bad */,
621 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth ACKs sent"),
627 * Handles the data after all fragments are put together
629 * @param cls macendpoint this messages belongs to
630 * @param hdr pointer to the data
633 bluetooth_data_message_handler (void *cls, const struct GNUNET_MessageHeader *hdr)
635 struct MacEndpoint *endpoint = cls;
636 struct Plugin *plugin = endpoint->plugin;
637 struct MacAndSession mas;
639 GNUNET_STATISTICS_update (plugin->env->stats,
640 _("# Bluetooth messages defragmented"), 1,
643 mas.endpoint = endpoint;
644 (void) GNUNET_SERVER_mst_receive (plugin->fragment_data_tokenizer,
648 GNUNET_YES, GNUNET_NO);
655 * @param session the session free
658 free_session (struct Session *session)
660 struct MacEndpoint *endpoint = session->mac;
661 struct PendingMessage *pm;
663 endpoint->plugin->env->session_end (endpoint->plugin->env->cls,
666 while (NULL != (pm = session->pending_message_head))
668 GNUNET_CONTAINER_DLL_remove (session->pending_message_head,
669 session->pending_message_tail, pm);
670 if (GNUNET_SCHEDULER_NO_TASK != pm->timeout_task)
672 GNUNET_SCHEDULER_cancel (pm->timeout_task);
673 pm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
675 GNUNET_free (pm->msg);
678 GNUNET_CONTAINER_DLL_remove (endpoint->sessions_head,
679 endpoint->sessions_tail,
681 if (session->timeout_task != GNUNET_SCHEDULER_NO_TASK)
683 GNUNET_SCHEDULER_cancel (session->timeout_task);
684 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
686 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), -1,
688 GNUNET_HELLO_address_free (session->address);
689 GNUNET_free (session);
694 * A session is timing out. Clean up.
696 * @param cls pointer to the Session
697 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
700 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
702 struct Session * session = cls;
703 struct GNUNET_TIME_Relative timeout;
705 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
706 timeout = GNUNET_TIME_absolute_get_remaining (session->timeout);
707 if (0 == timeout.rel_value_us)
709 free_session (session);
712 session->timeout_task =
713 GNUNET_SCHEDULER_add_delayed (timeout, &session_timeout, session);
718 * Create a new session
720 * @param endpoint pointer to the mac endpoint of the peer
721 * @param peer peer identity to use for this session
722 * @return returns the session
724 static struct Session *
725 create_session (struct MacEndpoint *endpoint,
726 const struct GNUNET_PeerIdentity *peer)
728 struct Session *session;
730 for (session = endpoint->sessions_head; NULL != session; session = session->next)
731 if (0 == memcmp (peer, &session->target,
732 sizeof (struct GNUNET_PeerIdentity)))
734 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
737 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), 1,
739 session = GNUNET_new (struct Session);
740 GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head,
741 endpoint->sessions_tail,
743 session->address = GNUNET_HELLO_address_allocate (peer, PLUGIN_NAME,
744 &endpoint->addr, sizeof (endpoint->addr), GNUNET_HELLO_ADDRESS_INFO_NONE);
745 session->mac = endpoint;
746 session->target = *peer;
747 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
748 session->timeout_task =
749 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, &session_timeout, session);
750 LOG (GNUNET_ERROR_TYPE_DEBUG,
751 "Created new session for peer `%s' with endpoint %s\n",
753 mac_to_string (&endpoint->addr.mac));
759 * Lookup a new session
761 * @param endpoint pointer to the mac endpoint of the peer
762 * @param peer peer identity to use for this session
763 * @return returns the session or NULL
765 static struct Session *
766 lookup_session (struct MacEndpoint *endpoint,
767 const struct GNUNET_PeerIdentity *peer)
769 struct Session *session;
771 for (session = endpoint->sessions_head; NULL != session; session = session->next)
772 if (0 == memcmp (peer, &session->target, sizeof (struct GNUNET_PeerIdentity)))
774 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
782 * Function called once we have successfully given the fragment
783 * message to the SUID helper process and we are thus ready for
786 * @param cls the 'struct FragmentMessage'
787 * @param result result of the operation (GNUNET_OK on success, GNUNET_NO if the helper died, GNUNET_SYSERR
788 * if the helper was stopped)
791 fragment_transmission_done (void *cls,
794 struct FragmentMessage *fm = cls;
798 GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
803 * Transmit a fragment of a message.
805 * @param cls 'struct FragmentMessage' this fragment message belongs to
806 * @param hdr pointer to the start of the fragment message
809 transmit_fragment (void *cls,
810 const struct GNUNET_MessageHeader *hdr)
812 struct FragmentMessage *fm = cls;
813 struct MacEndpoint *endpoint = fm->macendpoint;
817 msize = ntohs (hdr->size);
818 size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize;
821 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radio_header;
823 radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf;
824 get_radiotap_header (endpoint, radio_header, size);
825 get_wlan_header (endpoint->plugin,
826 &radio_header->frame,
828 sizeof (endpoint->addr.mac));
829 memcpy (&radio_header[1], hdr, msize);
830 GNUNET_assert (NULL == fm->sh);
831 fm->sh = GNUNET_HELPER_send (endpoint->plugin->suid_helper,
832 &radio_header->header,
834 &fragment_transmission_done, fm);
835 fm->size_on_wire += size;
837 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth message fragments sent"),
840 GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
841 GNUNET_STATISTICS_update (endpoint->plugin->env->stats,
842 "# bytes currently in Bluetooth buffers",
844 GNUNET_STATISTICS_update (endpoint->plugin->env->stats,
845 "# bytes transmitted via Bluetooth",
852 * Frees the space of a message in the fragment queue (send queue)
854 * @param fm message to free
857 free_fragment_message (struct FragmentMessage *fm)
859 struct MacEndpoint *endpoint = fm->macendpoint;
861 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth messages pending (with fragmentation)"),
863 GNUNET_CONTAINER_DLL_remove (endpoint->sending_messages_head,
864 endpoint->sending_messages_tail, fm);
867 GNUNET_HELPER_send_cancel (fm->sh);
870 GNUNET_FRAGMENT_context_destroy (fm->fragcontext,
871 &endpoint->msg_delay,
872 &endpoint->ack_delay);
873 if (fm->timeout_task != GNUNET_SCHEDULER_NO_TASK)
875 GNUNET_SCHEDULER_cancel (fm->timeout_task);
876 fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
883 * A FragmentMessage has timed out. Remove it.
885 * @param cls pointer to the 'struct FragmentMessage'
886 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
889 fragmentmessage_timeout (void *cls,
890 const struct GNUNET_SCHEDULER_TaskContext *tc)
892 struct FragmentMessage *fm = cls;
894 fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
895 if (NULL != fm->cont)
897 fm->cont (fm->cont_cls, &fm->target, GNUNET_SYSERR, fm->size_payload, fm->size_on_wire);
900 free_fragment_message (fm);
905 * Transmit a message to the given destination with fragmentation.
907 * @param endpoint desired destination
908 * @param timeout how long can the message wait?
909 * @param target peer that should receive the message
910 * @param msg message to transmit
911 * @param payload_size bytes of payload
912 * @param cont continuation to call once the message has
913 * been transmitted (or if the transport is ready
914 * for the next transmission call; or if the
915 * peer disconnected...); can be NULL
916 * @param cont_cls closure for cont
919 send_with_fragmentation (struct MacEndpoint *endpoint,
920 struct GNUNET_TIME_Relative timeout,
921 const struct GNUNET_PeerIdentity *target,
922 const struct GNUNET_MessageHeader *msg,
924 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
927 struct FragmentMessage *fm;
928 struct Plugin *plugin;
930 plugin = endpoint->plugin;
931 fm = GNUNET_new (struct FragmentMessage);
932 fm->macendpoint = endpoint;
933 fm->target = *target;
934 fm->size_payload = payload_size;
935 fm->size_on_wire = 0;
936 fm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
938 fm->cont_cls = cont_cls;
939 /* 1 MBit/s typical data rate, 1430 byte fragments => ~100 ms per message */
941 GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
946 &transmit_fragment, fm);
948 GNUNET_SCHEDULER_add_delayed (timeout,
949 &fragmentmessage_timeout, fm);
950 GNUNET_CONTAINER_DLL_insert_tail (endpoint->sending_messages_head,
951 endpoint->sending_messages_tail,
957 * Free a MAC endpoint.
959 * @param endpoint pointer to the MacEndpoint to free
962 free_macendpoint (struct MacEndpoint *endpoint)
964 struct Plugin *plugin = endpoint->plugin;
965 struct FragmentMessage *fm;
966 struct Session *session;
968 GNUNET_STATISTICS_update (plugin->env->stats,
969 _("# Bluetooth MAC endpoints allocated"), -1, GNUNET_NO);
970 while (NULL != (session = endpoint->sessions_head))
971 free_session (session);
972 while (NULL != (fm = endpoint->sending_messages_head))
973 free_fragment_message (fm);
974 GNUNET_CONTAINER_DLL_remove (plugin->mac_head,
978 if (NULL != endpoint->defrag)
980 GNUNET_DEFRAGMENT_context_destroy(endpoint->defrag);
981 endpoint->defrag = NULL;
985 if (GNUNET_SCHEDULER_NO_TASK != endpoint->timeout_task)
987 GNUNET_SCHEDULER_cancel (endpoint->timeout_task);
988 endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
990 GNUNET_free (endpoint);
995 * A MAC endpoint is timing out. Clean up.
997 * @param cls pointer to the MacEndpoint
998 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
1001 macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1003 struct MacEndpoint *endpoint = cls;
1004 struct GNUNET_TIME_Relative timeout;
1006 endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1007 timeout = GNUNET_TIME_absolute_get_remaining (endpoint->timeout);
1008 if (0 == timeout.rel_value_us)
1010 free_macendpoint (endpoint);
1013 endpoint->timeout_task =
1014 GNUNET_SCHEDULER_add_delayed (timeout, &macendpoint_timeout,
1020 * Find (or create) a MacEndpoint with a specific MAC address
1022 * @param plugin pointer to the plugin struct
1023 * @param addr the MAC address of the endpoint
1024 * @return handle to our data structure for this MAC
1026 static struct MacEndpoint *
1027 create_macendpoint (struct Plugin *plugin,
1028 struct WlanAddress *addr)
1030 struct MacEndpoint *pos;
1032 for (pos = plugin->mac_head; NULL != pos; pos = pos->next)
1033 if (0 == memcmp (addr, &pos->addr, sizeof (struct WlanAddress)))
1035 pos = GNUNET_new (struct MacEndpoint);
1036 pos->addr = (*addr);
1037 pos->plugin = plugin;
1039 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
1040 MESSAGES_IN_DEFRAG_QUEUE_PER_MAC,
1042 &bluetooth_data_message_handler,
1045 pos->msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1046 pos->ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1048 pos->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT);
1050 GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout,
1052 GNUNET_CONTAINER_DLL_insert (plugin->mac_head, plugin->mac_tail, pos);
1053 plugin->mac_count++;
1054 GNUNET_STATISTICS_update (plugin->env->stats, _("# Bluetooth MAC endpoints allocated"),
1056 LOG (GNUNET_ERROR_TYPE_DEBUG,
1057 "New MAC endpoint `%s'\n",
1058 bluetooth_plugin_address_to_string(NULL, addr, sizeof (struct WlanAddress)));
1064 * Function obtain the network type for a session
1066 * @param cls closure ('struct Plugin*')
1067 * @param session the session
1068 * @return the network type in HBO or GNUNET_SYSERR
1070 static enum GNUNET_ATS_Network_Type
1071 bluetooth_get_network (void *cls,
1072 struct Session *session)
1074 GNUNET_assert (NULL != session);
1075 return GNUNET_ATS_NET_BT;
1080 * Look up a session for a peer and create a new session if none is found
1082 * @param endpoint pointer to the mac endpoint of the peer
1083 * @param peer peer identity to use for this session
1084 * @return returns the session
1086 static struct Session *
1087 get_session (struct MacEndpoint *endpoint,
1088 const struct GNUNET_PeerIdentity *peer)
1090 struct Session *session;
1091 if (NULL != (session = lookup_session (endpoint, peer)))
1093 return create_session (endpoint, peer);
1098 * Creates a new outbound session the transport service will use to send data to the
1101 * @param cls the plugin
1102 * @param address the address
1103 * @return the session or NULL of max connections exceeded
1105 static struct Session *
1106 bluetooth_plugin_get_session (void *cls,
1107 const struct GNUNET_HELLO_Address *address)
1109 struct Plugin *plugin = cls;
1110 struct MacEndpoint *endpoint;
1112 if (NULL == address)
1114 if (sizeof (struct WlanAddress) != address->address_length)
1119 LOG (GNUNET_ERROR_TYPE_DEBUG,
1120 "Service asked to create session for peer `%s' with MAC `%s'\n",
1121 GNUNET_i2s (&address->peer),
1122 bluetooth_plugin_address_to_string(NULL, address->address, address->address_length));
1123 endpoint = create_macendpoint (plugin, (struct WlanAddress *) address->address);
1124 return get_session (endpoint, &address->peer);
1129 * Function that can be used to force the plugin to disconnect
1130 * from the given peer and cancel all previous transmissions
1131 * (and their continuation).
1133 * @param cls closure
1134 * @param target peer from which to disconnect
1137 bluetooth_plugin_disconnect_peer (void *cls, const struct GNUNET_PeerIdentity *target)
1139 struct Plugin *plugin = cls;
1140 struct Session *session;
1141 struct MacEndpoint *endpoint;
1143 for (endpoint = plugin->mac_head; NULL != endpoint; endpoint = endpoint->next)
1144 for (session = endpoint->sessions_head; NULL != session; session = session->next)
1145 if (0 == memcmp (target, &session->target,
1146 sizeof (struct GNUNET_PeerIdentity)))
1148 free_session (session);
1149 break; /* inner-loop only (in case peer has another MAC as well!) */
1155 * Function that can be used to force the plugin to disconnect
1156 * from the given peer and cancel all previous transmissions
1157 * (and their continuation).
1159 * @param cls closure
1160 * @param session session to disconnect
1163 bluetooth_plugin_disconnect_session (void *cls,
1164 struct Session *session)
1166 free_session (session);
1172 * Function that is called to get the keepalive factor.
1173 * GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1174 * calculate the interval between keepalive packets.
1176 * @param cls closure with the `struct Plugin`
1177 * @return keepalive factor
1180 bluetooth_query_keepalive_factor (void *cls)
1187 * Function that can be used by the transport service to transmit
1188 * a message using the plugin. Note that in the case of a
1189 * peer disconnecting, the continuation MUST be called
1190 * prior to the disconnect notification itself. This function
1191 * will be called with this peer's HELLO message to initiate
1192 * a fresh connection to another peer.
1194 * @param cls closure
1195 * @param session which session must be used
1196 * @param msgbuf the message to transmit
1197 * @param msgbuf_size number of bytes in 'msgbuf'
1198 * @param priority how important is the message (most plugins will
1199 * ignore message priority and just FIFO)
1200 * @param to how long to wait at most for the transmission (does not
1201 * require plugins to discard the message after the timeout,
1202 * just advisory for the desired delay; most plugins will ignore
1204 * @param cont continuation to call once the message has
1205 * been transmitted (or if the transport is ready
1206 * for the next transmission call; or if the
1207 * peer disconnected...); can be NULL
1208 * @param cont_cls closure for cont
1209 * @return number of bytes used (on the physical network, with overheads);
1210 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1211 * and does NOT mean that the message was not transmitted (DV)
1214 bluetooth_plugin_send (void *cls,
1215 struct Session *session,
1216 const char *msgbuf, size_t msgbuf_size,
1217 unsigned int priority,
1218 struct GNUNET_TIME_Relative to,
1219 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1221 struct Plugin *plugin = cls;
1222 struct WlanHeader *wlanheader;
1223 size_t size = msgbuf_size + sizeof (struct WlanHeader);
1224 char buf[size] GNUNET_ALIGN;
1226 LOG (GNUNET_ERROR_TYPE_DEBUG,
1227 "Transmitting %u bytes of payload to peer `%s' (starting with %u byte message of type %u)\n",
1229 GNUNET_i2s (&session->target),
1230 (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->size),
1231 (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->type));
1232 wlanheader = (struct WlanHeader *) buf;
1233 wlanheader->header.size = htons (msgbuf_size + sizeof (struct WlanHeader));
1234 wlanheader->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA);
1235 wlanheader->sender = *plugin->env->my_identity;
1236 wlanheader->target = session->target;
1237 wlanheader->crc = htonl (GNUNET_CRYPTO_crc32_n (msgbuf, msgbuf_size));
1238 memcpy (&wlanheader[1], msgbuf, msgbuf_size);
1240 GNUNET_STATISTICS_update (plugin->env->stats,
1241 "# bytes currently in Bluetooth buffers",
1242 msgbuf_size, GNUNET_NO);
1244 send_with_fragmentation (session->mac,
1247 &wlanheader->header,
1255 * We have received data from the WLAN via some session. Process depending
1256 * on the message type (HELLO, DATA, FRAGMENTATION or FRAGMENTATION-ACK).
1258 * @param cls pointer to the plugin
1259 * @param client pointer to the session this message belongs to
1260 * @param hdr start of the message
1263 process_data (void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
1265 struct Plugin *plugin = cls;
1266 struct GNUNET_HELLO_Address *address;
1267 struct MacAndSession *mas = client;
1268 struct MacAndSession xmas;
1269 struct GNUNET_ATS_Information ats;
1270 struct FragmentMessage *fm;
1271 struct GNUNET_PeerIdentity tmpsource;
1272 const struct WlanHeader *wlanheader;
1276 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
1277 ats.value = htonl (GNUNET_ATS_NET_BT);
1278 msize = ntohs (hdr->size);
1280 GNUNET_STATISTICS_update (plugin->env->stats,
1281 "# bytes received via Bluetooth",
1284 switch (ntohs (hdr->type))
1286 case GNUNET_MESSAGE_TYPE_HELLO:
1288 GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hdr, &tmpsource))
1290 GNUNET_break_op (0);
1293 if (NULL == mas->endpoint)
1299 LOG (GNUNET_ERROR_TYPE_DEBUG,
1300 "Processing %u bytes of HELLO from peer `%s' at MAC %s\n",
1301 (unsigned int) msize,
1302 GNUNET_i2s (&tmpsource),
1303 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr,
1304 sizeof (mas->endpoint->addr)));
1306 GNUNET_STATISTICS_update (plugin->env->stats,
1307 _("# HELLO messages received via Bluetooth"), 1,
1310 address = GNUNET_HELLO_address_allocate (&tmpsource, PLUGIN_NAME,
1311 &mas->endpoint->addr, sizeof (mas->endpoint->addr),
1312 GNUNET_HELLO_ADDRESS_INFO_INBOUND);
1313 plugin->env->receive (plugin->env->cls,
1314 address, mas->session, hdr);
1315 plugin->env->update_address_metrics (plugin->env->cls,
1316 address, mas->session, &ats, 1);
1317 GNUNET_HELLO_address_free (address);
1319 case GNUNET_MESSAGE_TYPE_FRAGMENT:
1320 if (NULL == mas->endpoint)
1325 LOG (GNUNET_ERROR_TYPE_DEBUG,
1326 "Processing %u bytes of FRAGMENT from MAC %s\n",
1327 (unsigned int) msize,
1328 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr,
1329 sizeof (mas->endpoint->addr)));
1330 GNUNET_STATISTICS_update (plugin->env->stats,
1331 _("# fragments received via Bluetooth"), 1, GNUNET_NO);
1332 (void) GNUNET_DEFRAGMENT_process_fragment (mas->endpoint->defrag,
1335 case GNUNET_MESSAGE_TYPE_FRAGMENT_ACK:
1336 if (NULL == mas->endpoint)
1341 GNUNET_STATISTICS_update (plugin->env->stats, _("# ACKs received via Bluetooth"),
1343 for (fm = mas->endpoint->sending_messages_head; NULL != fm; fm = fm->next)
1345 ret = GNUNET_FRAGMENT_process_ack (fm->fragcontext, hdr);
1346 if (GNUNET_OK == ret)
1348 LOG (GNUNET_ERROR_TYPE_DEBUG,
1349 "Got last ACK, finished message transmission to `%s' (%p)\n",
1350 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr,
1351 sizeof (mas->endpoint->addr)),
1353 mas->endpoint->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT);
1354 if (NULL != fm->cont)
1356 fm->cont (fm->cont_cls, &fm->target, GNUNET_OK, fm->size_payload, fm->size_on_wire);
1359 free_fragment_message (fm);
1362 if (GNUNET_NO == ret)
1364 LOG (GNUNET_ERROR_TYPE_DEBUG,
1365 "Got an ACK, message transmission to `%s' not yet finished\n",
1366 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr,
1367 sizeof (mas->endpoint->addr)));
1371 LOG (GNUNET_ERROR_TYPE_DEBUG,
1372 "ACK not matched against any active fragmentation with MAC `%s'\n",
1373 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr,
1374 sizeof (mas->endpoint->addr)));
1376 case GNUNET_MESSAGE_TYPE_WLAN_DATA:
1377 if (NULL == mas->endpoint)
1382 if (msize < sizeof (struct WlanHeader))
1387 wlanheader = (const struct WlanHeader *) hdr;
1388 if (0 != memcmp (&wlanheader->target,
1389 plugin->env->my_identity,
1390 sizeof (struct GNUNET_PeerIdentity)))
1392 LOG (GNUNET_ERROR_TYPE_DEBUG,
1393 "Bluetooth data for `%s', not for me, ignoring\n",
1394 GNUNET_i2s (&wlanheader->target));
1397 if (ntohl (wlanheader->crc) !=
1398 GNUNET_CRYPTO_crc32_n (&wlanheader[1], msize - sizeof (struct WlanHeader)))
1400 GNUNET_STATISTICS_update (plugin->env->stats,
1401 _("# Bluetooth DATA messages discarded due to CRC32 error"), 1,
1405 xmas.endpoint = mas->endpoint;
1406 xmas.session = create_session (mas->endpoint, &wlanheader->sender);
1407 LOG (GNUNET_ERROR_TYPE_DEBUG,
1408 "Processing %u bytes of BLUETOOTH DATA from peer `%s'\n",
1409 (unsigned int) msize,
1410 GNUNET_i2s (&wlanheader->sender));
1411 (void) GNUNET_SERVER_mst_receive (plugin->wlan_header_payload_tokenizer,
1413 (const char *) &wlanheader[1],
1414 msize - sizeof (struct WlanHeader),
1415 GNUNET_YES, GNUNET_NO);
1418 if (NULL == mas->endpoint)
1423 if (NULL == mas->session)
1428 LOG (GNUNET_ERROR_TYPE_DEBUG,
1429 "Received packet with %u bytes of type %u from peer %s\n",
1430 (unsigned int) msize,
1431 (unsigned int) ntohs (hdr->type),
1432 GNUNET_i2s (&mas->session->target));
1433 plugin->env->receive (plugin->env->cls,
1434 mas->session->address,
1437 plugin->env->update_address_metrics (plugin->env->cls,
1438 mas->session->address,
1448 * Function used for to process the data from the suid process
1450 * @param cls the plugin handle
1451 * @param client client that send the data (not used)
1452 * @param hdr header of the GNUNET_MessageHeader
1455 handle_helper_message (void *cls, void *client,
1456 const struct GNUNET_MessageHeader *hdr)
1458 struct Plugin *plugin = cls;
1459 struct GNUNET_HELLO_Address *address;
1460 const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *rxinfo;
1461 const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *cm;
1462 struct WlanAddress wa;
1463 struct MacAndSession mas;
1466 msize = ntohs (hdr->size);
1467 switch (ntohs (hdr->type))
1469 case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL:
1470 if (msize != sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage))
1475 cm = (const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *) hdr;
1476 if (GNUNET_YES == plugin->have_mac)
1478 if (0 == memcmp (&plugin->mac_address,
1480 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1481 break; /* no change */
1482 /* remove old address */
1483 memset (&wa, 0, sizeof (struct WlanAddress));
1484 wa.mac = plugin->mac_address;
1485 wa.options = htonl(plugin->options);
1486 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1487 PLUGIN_NAME, &wa, sizeof (wa), GNUNET_HELLO_ADDRESS_INFO_NONE);
1488 plugin->env->notify_address (plugin->env->cls, GNUNET_NO, address);
1489 GNUNET_HELLO_address_free (address);
1491 plugin->mac_address = cm->mac;
1492 plugin->have_mac = GNUNET_YES;
1493 memset (&wa, 0, sizeof (struct WlanAddress));
1494 wa.mac = plugin->mac_address;
1495 wa.options = htonl(plugin->options);
1496 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1497 PLUGIN_NAME, &wa, sizeof (wa), GNUNET_HELLO_ADDRESS_INFO_NONE);
1499 LOG (GNUNET_ERROR_TYPE_DEBUG,
1500 "Received BT_HELPER_CONTROL message with MAC address `%s' for peer `%s'\n",
1501 mac_to_string (&cm->mac),
1502 GNUNET_i2s (plugin->env->my_identity));
1503 plugin->env->notify_address (plugin->env->cls, GNUNET_YES, address);
1504 GNUNET_HELLO_address_free (address);
1507 case GNUNET_MESSAGE_TYPE_WLAN_DATA_FROM_HELPER:
1508 LOG (GNUNET_ERROR_TYPE_DEBUG,
1509 "Got data message from helper with %u bytes\n",
1511 GNUNET_STATISTICS_update (plugin->env->stats,
1512 _("# DATA messages received via Bluetooth"), 1,
1514 if (msize < sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage))
1517 LOG (GNUNET_ERROR_TYPE_DEBUG,
1518 "Size of packet is too small (%u bytes)\n",
1522 rxinfo = (const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *) hdr;
1524 /* check if message is actually for us */
1525 if (0 != memcmp (&rxinfo->frame.addr3, &mac_bssid_gnunet,
1526 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1528 /* Not the GNUnet BSSID */
1531 if ( (0 != memcmp (&rxinfo->frame.addr1, &bc_all_mac,
1532 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) &&
1533 (0 != memcmp (&rxinfo->frame.addr1, &plugin->mac_address,
1534 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) )
1536 /* Neither broadcast nor specifically for us */
1539 if (0 == memcmp (&rxinfo->frame.addr2, &plugin->mac_address,
1540 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1542 /* packet is FROM us, thus not FOR us */
1546 GNUNET_STATISTICS_update (plugin->env->stats,
1547 _("# Bluetooth DATA messages processed"),
1549 LOG (GNUNET_ERROR_TYPE_DEBUG,
1550 "Receiving %u bytes of data from MAC `%s'\n",
1551 (unsigned int) (msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage)),
1552 mac_to_string (&rxinfo->frame.addr2));
1553 wa.mac = rxinfo->frame.addr2;
1554 wa.options = htonl (0);
1555 mas.endpoint = create_macendpoint (plugin, &wa);
1557 (void) GNUNET_SERVER_mst_receive (plugin->helper_payload_tokenizer,
1559 (const char*) &rxinfo[1],
1560 msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage),
1561 GNUNET_YES, GNUNET_NO);
1565 LOG (GNUNET_ERROR_TYPE_DEBUG,
1566 "Unexpected message of type %u (%u bytes)",
1567 ntohs (hdr->type), ntohs (hdr->size));
1576 * Task to (periodically) send a HELLO beacon
1578 * @param cls pointer to the plugin struct
1579 * @param tc scheduler context
1582 send_hello_beacon (void *cls,
1583 const struct GNUNET_SCHEDULER_TaskContext *tc)
1585 struct Plugin *plugin = cls;
1587 uint16_t hello_size;
1588 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radioHeader;
1589 const struct GNUNET_MessageHeader *hello;
1591 hello = plugin->env->get_our_hello ();
1592 hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello);
1593 GNUNET_assert (sizeof (struct WlanHeader) + hello_size <= WLAN_MTU);
1594 size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + hello_size;
1596 char buf[size] GNUNET_ALIGN;
1598 LOG (GNUNET_ERROR_TYPE_DEBUG,
1599 "Sending %u byte HELLO beacon\n",
1600 (unsigned int) size);
1601 radioHeader = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage*) buf;
1602 get_radiotap_header (NULL, radioHeader, size);
1603 get_wlan_header (plugin, &radioHeader->frame, &bc_all_mac, size);
1604 memcpy (&radioHeader[1], hello, hello_size);
1606 GNUNET_HELPER_send (plugin->suid_helper,
1607 &radioHeader->header,
1608 GNUNET_YES /* can drop */,
1610 GNUNET_STATISTICS_update (plugin->env->stats, _("# HELLO beacons sent via Bluetooth"),
1613 plugin->beacon_task =
1614 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
1615 (HELLO_BEACON_SCALING_FACTOR,
1616 plugin->mac_count + 1),
1624 * Another peer has suggested an address for this
1625 * peer and transport plugin. Check that this could be a valid
1626 * address. If so, consider adding it to the list
1629 * @param cls closure
1630 * @param addr pointer to the address
1631 * @param addrlen length of addr
1632 * @return GNUNET_OK if this is a plausible address for this peer
1636 bluetooth_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
1638 struct Plugin *plugin = cls;
1639 struct WlanAddress *wa = (struct WlanAddress *) addr;
1641 if (addrlen != sizeof (struct WlanAddress))
1643 GNUNET_break_op (0);
1644 return GNUNET_SYSERR;
1646 if (GNUNET_YES != plugin->have_mac)
1648 LOG (GNUNET_ERROR_TYPE_DEBUG,
1649 "Rejecting MAC `%s': I don't know my MAC!\n",
1650 mac_to_string (addr));
1651 return GNUNET_NO; /* don't know my MAC */
1653 if (0 != memcmp (&wa->mac,
1654 &plugin->mac_address,
1657 LOG (GNUNET_ERROR_TYPE_DEBUG,
1658 "Rejecting MAC `%s': not my MAC!\n",
1659 mac_to_string (addr));
1660 return GNUNET_NO; /* not my MAC */
1667 * Function called for a quick conversion of the binary address to
1668 * a numeric address. Note that the caller must not free the
1669 * address and that the next call to this function is allowed
1670 * to override the address again.
1672 * @param cls closure
1673 * @param addr binary address
1674 * @param addrlen length of the address
1675 * @return string representing the same address
1678 bluetooth_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
1680 const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac;
1681 static char macstr[36];
1683 if (sizeof (struct WlanAddress) != addrlen)
1688 mac = &((struct WlanAddress *) addr)->mac;
1689 GNUNET_snprintf (macstr, sizeof (macstr), "%s.%u.%s",
1690 PLUGIN_NAME, ntohl (((struct WlanAddress *) addr)->options),
1691 mac_to_string (mac));
1697 * Convert the transports address to a nice, human-readable format.
1699 * @param cls closure
1700 * @param type name of the transport that generated the address
1701 * @param addr one of the addresses of the host, NULL for the last address
1702 * the specific address format depends on the transport
1703 * @param addrlen length of the address
1704 * @param numeric should (IP) addresses be displayed in numeric form?
1705 * @param timeout after how long should we give up?
1706 * @param asc function to call on each string
1707 * @param asc_cls closure for asc
1710 bluetooth_plugin_address_pretty_printer (void *cls, const char *type,
1711 const void *addr, size_t addrlen,
1713 struct GNUNET_TIME_Relative timeout,
1714 GNUNET_TRANSPORT_AddressStringCallback asc,
1719 if (sizeof (struct WlanAddress) != addrlen)
1721 /* invalid address */
1722 LOG (GNUNET_ERROR_TYPE_WARNING,
1723 _("Bluetooth address with invalid size encountered\n"));
1724 asc (asc_cls, NULL);
1727 ret = GNUNET_strdup (bluetooth_plugin_address_to_string(NULL, addr, addrlen));
1730 asc (asc_cls, NULL);
1735 * Exit point from the plugin.
1737 * @param cls pointer to the api struct
1740 libgnunet_plugin_transport_bluetooth_done (void *cls)
1742 struct WlanAddress wa;
1743 struct GNUNET_HELLO_Address *address;
1744 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1745 struct Plugin *plugin = api->cls;
1746 struct MacEndpoint *endpoint;
1747 struct MacEndpoint *endpoint_next;
1755 if (GNUNET_YES == plugin->have_mac)
1757 memset (&wa, 0, sizeof(wa));
1758 wa.options = htonl (plugin->options);
1759 wa.mac = plugin->mac_address;
1760 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1761 PLUGIN_NAME, &wa, sizeof (struct WlanAddress),
1762 GNUNET_HELLO_ADDRESS_INFO_NONE);
1764 plugin->env->notify_address (plugin->env->cls, GNUNET_NO, address);
1765 plugin->have_mac = GNUNET_NO;
1767 GNUNET_HELLO_address_free (address);
1770 if (GNUNET_SCHEDULER_NO_TASK != plugin->beacon_task)
1772 GNUNET_SCHEDULER_cancel (plugin->beacon_task);
1773 plugin->beacon_task = GNUNET_SCHEDULER_NO_TASK;
1775 if (NULL != plugin->suid_helper)
1777 GNUNET_HELPER_stop (plugin->suid_helper, GNUNET_NO);
1778 plugin->suid_helper = NULL;
1780 endpoint_next = plugin->mac_head;
1781 while (NULL != (endpoint = endpoint_next))
1783 endpoint_next = endpoint->next;
1784 free_macendpoint (endpoint);
1786 if (NULL != plugin->fragment_data_tokenizer)
1788 GNUNET_SERVER_mst_destroy (plugin->fragment_data_tokenizer);
1789 plugin->fragment_data_tokenizer = NULL;
1791 if (NULL != plugin->wlan_header_payload_tokenizer)
1793 GNUNET_SERVER_mst_destroy (plugin->wlan_header_payload_tokenizer);
1794 plugin->wlan_header_payload_tokenizer = NULL;
1796 if (NULL != plugin->helper_payload_tokenizer)
1798 GNUNET_SERVER_mst_destroy (plugin->helper_payload_tokenizer);
1799 plugin->helper_payload_tokenizer = NULL;
1801 GNUNET_free_non_null (plugin->interface);
1802 GNUNET_free (plugin);
1809 * Function called to convert a string address to
1812 * @param cls closure ('struct Plugin*')
1813 * @param addr string address
1814 * @param addrlen length of the address
1815 * @param buf location to store the buffer
1816 * @param added location to store the number of bytes in the buffer.
1817 * If the function returns GNUNET_SYSERR, its contents are undefined.
1818 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1821 bluetooth_string_to_address (void *cls, const char *addr, uint16_t addrlen,
1822 void **buf, size_t *added)
1824 struct WlanAddress *wa;
1830 if ((NULL == addr) || (addrlen == 0))
1833 return GNUNET_SYSERR;
1835 if ('\0' != addr[addrlen - 1])
1838 return GNUNET_SYSERR;
1840 if (strlen (addr) != addrlen - 1)
1843 return GNUNET_SYSERR;
1846 if (8 != SSCANF (addr,
1847 "%9s.%u.%X:%X:%X:%X:%X:%X",
1849 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]))
1852 return GNUNET_SYSERR;
1854 wa = GNUNET_new (struct WlanAddress);
1856 wa->mac.mac[i] = a[i];
1857 wa->options = htonl (0);
1859 *added = sizeof (struct WlanAddress);
1864 bluetooth_plugin_update_session_timeout (void *cls,
1865 const struct GNUNET_PeerIdentity *peer,
1866 struct Session *session)
1868 if (GNUNET_SCHEDULER_NO_TASK != session->timeout_task)
1869 GNUNET_SCHEDULER_cancel (session->timeout_task);
1870 session->timeout_task = GNUNET_SCHEDULER_add_delayed (
1871 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, &session_timeout, session);
1877 * Entry point for the plugin.
1879 * @param cls closure, the 'struct GNUNET_TRANSPORT_PluginEnvironment*'
1880 * @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error
1883 libgnunet_plugin_transport_bluetooth_init (void *cls)
1885 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1886 struct GNUNET_TRANSPORT_PluginFunctions *api;
1887 struct Plugin *plugin;
1889 unsigned long long testmode;
1892 /* check for 'special' mode */
1893 if (NULL == env->receive)
1895 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1896 initialze the plugin or the API */
1897 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1899 api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer;
1900 api->address_to_string = &bluetooth_plugin_address_to_string;
1901 api->string_to_address = &bluetooth_string_to_address;
1906 /* check configuration */
1908 GNUNET_CONFIGURATION_have_value (env->cfg, "transport-bluetooth", "TESTMODE")) &&
1910 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-bluetooth",
1911 "TESTMODE", &testmode)) ||
1914 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1915 "transport-bluetooth", "TESTMODE");
1918 binary = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-transport-bluetooth");
1919 if ( (0 == testmode) &&
1920 (GNUNET_YES != GNUNET_OS_check_helper_binary (binary, GNUNET_YES, NULL)) )
1922 LOG (GNUNET_ERROR_TYPE_ERROR,
1923 _("Helper binary `%s' not SUID, cannot run bluetooth transport\n"),
1924 "gnunet-helper-transport-bluetooth");
1925 GNUNET_free (binary);
1928 GNUNET_free (binary);
1930 GNUNET_CONFIGURATION_get_value_string
1931 (env->cfg, "transport-bluetooth", "INTERFACE",
1934 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1935 "transport-bluetooth", "INTERFACE");
1939 plugin = GNUNET_new (struct Plugin);
1940 plugin->interface = interface;
1942 GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth sessions allocated"),
1944 GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth MAC endpoints allocated"),
1946 GNUNET_BANDWIDTH_tracker_init (&plugin->tracker, NULL, NULL,
1947 GNUNET_BANDWIDTH_value_init (100 * 1024 *
1949 plugin->fragment_data_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1950 plugin->wlan_header_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1951 plugin->helper_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1952 plugin->beacon_task = GNUNET_SCHEDULER_add_now (&send_hello_beacon,
1955 plugin->options = 0;
1957 /* some compilers do not like switch on 'long long'... */
1958 switch ((unsigned int) testmode)
1960 case 0: /* normal */
1961 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-bluetooth";
1962 plugin->helper_argv[1] = interface;
1963 plugin->helper_argv[2] = NULL;
1964 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1965 "gnunet-helper-transport-bluetooth",
1966 plugin->helper_argv,
1967 &handle_helper_message,
1971 case 1: /* testmode, peer 1 */
1972 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy";
1973 plugin->helper_argv[1] = (char *) "1";
1974 plugin->helper_argv[2] = NULL;
1975 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1976 "gnunet-helper-transport-wlan-dummy",
1977 plugin->helper_argv,
1978 &handle_helper_message,
1982 case 2: /* testmode, peer 2 */
1983 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy";
1984 plugin->helper_argv[1] = (char *) "2";
1985 plugin->helper_argv[2] = NULL;
1986 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1987 "gnunet-helper-transport-wlan-dummy",
1988 plugin->helper_argv,
1989 &handle_helper_message,
1997 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1999 api->send = &bluetooth_plugin_send;
2000 api->get_session = &bluetooth_plugin_get_session;
2001 api->disconnect_peer = &bluetooth_plugin_disconnect_peer;
2002 api->disconnect_session = &bluetooth_plugin_disconnect_session;
2003 api->query_keepalive_factor = &bluetooth_query_keepalive_factor;
2004 api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer;
2005 api->check_address = &bluetooth_plugin_address_suggested;
2006 api->address_to_string = &bluetooth_plugin_address_to_string;;
2007 api->string_to_address = &bluetooth_string_to_address;
2008 api->get_network = &bluetooth_get_network;
2009 api->update_session_timeout = &bluetooth_plugin_update_session_timeout;
2015 /* end of plugin_transport_bluetooth.c */