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.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_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 * Head of messages currently pending for transmission to this peer.
204 struct PendingMessage *pending_message_head;
207 * Tail of messages currently pending for transmission to this peer.
209 struct PendingMessage *pending_message_tail;
212 * When should this session time out?
214 struct GNUNET_TIME_Absolute timeout;
217 * Timeout task (for the session).
219 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
225 * Struct for messages that are being fragmented in a MAC's transmission queue.
227 struct FragmentMessage
231 * This is a doubly-linked list.
233 struct FragmentMessage *next;
236 * This is a doubly-linked list.
238 struct FragmentMessage *prev;
241 * MAC endpoint this message belongs to
243 struct MacEndpoint *macendpoint;
246 * Fragmentation context
248 struct GNUNET_FRAGMENT_Context *fragcontext;
251 * Transmission handle to helper (to cancel if the frag context
252 * is destroyed early for some reason).
254 struct GNUNET_HELPER_SendHandle *sh;
257 * Intended recipient.
259 struct GNUNET_PeerIdentity target;
262 * Timeout value for the message.
264 struct GNUNET_TIME_Absolute timeout;
269 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
272 * Continuation to call when we're done with this message.
274 GNUNET_TRANSPORT_TransmitContinuation cont;
282 * Size of original message
287 * Number of bytes used to transmit message
295 * Struct to represent one network card connection
301 * We keep all MACs in a DLL in the plugin.
303 struct MacEndpoint *next;
306 * We keep all MACs in a DLL in the plugin.
308 struct MacEndpoint *prev;
311 * Pointer to the global plugin struct.
313 struct Plugin *plugin;
316 * Head of sessions that use this MAC.
318 struct Session *sessions_head;
321 * Tail of sessions that use this MAC.
323 struct Session *sessions_tail;
326 * Head of messages we are currently sending to this MAC.
328 struct FragmentMessage *sending_messages_head;
331 * Tail of messages we are currently sending to this MAC.
333 struct FragmentMessage *sending_messages_tail;
336 * Defrag context for this MAC
338 struct GNUNET_DEFRAGMENT_Context *defrag;
341 * When should this endpoint time out?
343 struct GNUNET_TIME_Absolute timeout;
348 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
351 * count of messages in the fragment out queue for this mac endpoint
353 unsigned int fragment_messages_out_count;
358 struct WlanAddress addr;
361 * Message delay for fragmentation context
363 struct GNUNET_TIME_Relative msg_delay;
366 * ACK delay for fragmentation context
368 struct GNUNET_TIME_Relative ack_delay;
371 * Desired transmission power for this MAC
376 * Desired transmission rate for this MAC
381 * Antenna we should use for this MAC
389 * Encapsulation of all of the state of the plugin.
396 struct GNUNET_TRANSPORT_PluginEnvironment *env;
399 * Handle to helper process for priviledged operations.
401 struct GNUNET_HELPER_Handle *suid_helper;
404 * ARGV-vector for the helper (all helpers take only the binary
405 * name, one actual argument, plus the NULL terminator for 'argv').
407 char * helper_argv[3];
410 * The interface of the wlan card given to us by the user.
415 * Tokenizer for demultiplexing of data packets resulting from defragmentation.
417 struct GNUNET_SERVER_MessageStreamTokenizer *fragment_data_tokenizer;
420 * Tokenizer for demultiplexing of data packets received from the suid helper
422 struct GNUNET_SERVER_MessageStreamTokenizer *helper_payload_tokenizer;
425 * Tokenizer for demultiplexing of data packets that follow the WLAN Header
427 struct GNUNET_SERVER_MessageStreamTokenizer *wlan_header_payload_tokenizer;
430 * Head of list of open connections.
432 struct MacEndpoint *mac_head;
435 * Tail of list of open connections.
437 struct MacEndpoint *mac_tail;
440 * Number of connections
442 unsigned int mac_count;
445 * Task that periodically sends a HELLO beacon via the helper.
447 GNUNET_SCHEDULER_TaskIdentifier beacon_task;
450 * Tracker for bandwidth limit
452 struct GNUNET_BANDWIDTH_Tracker tracker;
455 * The mac_address of the wlan card given to us by the helper.
457 struct GNUNET_TRANSPORT_WLAN_MacAddress mac_address;
460 * Have we received a control message with our MAC address yet?
465 * Options for addresses
473 * Information associated with a message. Can contain
474 * the session or the MAC endpoint associated with the
480 * NULL if the identity of the other peer is not known.
482 struct Session *session;
485 * MAC address of the other peer, NULL if not known.
487 struct MacEndpoint *endpoint;
491 * Function called for a quick conversion of the binary address to
492 * a numeric address. Note that the caller must not free the
493 * address and that the next call to this function is allowed
494 * to override the address again.
497 * @param addr binary address
498 * @param addrlen length of the address
499 * @return string representing the same address
502 bluetooth_plugin_address_to_string (void *cls, const void *addr, size_t addrlen);
505 * Print MAC addresses nicely.
507 * @param mac the mac address
508 * @return string to a static buffer with the human-readable mac, will be overwritten during the next call to this function
511 mac_to_string (const struct GNUNET_TRANSPORT_WLAN_MacAddress * mac)
513 static char macstr[20];
515 GNUNET_snprintf (macstr, sizeof (macstr), "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
516 mac->mac[0], mac->mac[1],
517 mac->mac[2], mac->mac[3], mac->mac[4], mac->mac[5]);
523 * Fill the radiotap header
525 * @param endpoint pointer to the endpoint, can be NULL
526 * @param header pointer to the radiotap header
527 * @param size total message size
530 get_radiotap_header (struct MacEndpoint *endpoint,
531 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header,
534 header->header.type = ntohs (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER);
535 header->header.size = ntohs (size);
536 if (NULL != endpoint)
538 header->rate = endpoint->rate;
539 header->tx_power = endpoint->tx_power;
540 header->antenna = endpoint->antenna;
545 header->tx_power = 0;
552 * Generate the WLAN hardware header for one packet
554 * @param plugin the plugin handle
555 * @param header address to write the header to
556 * @param to_mac_addr address of the recipient
557 * @param size size of the whole packet, needed to calculate the time to send the packet
560 get_wlan_header (struct Plugin *plugin,
561 struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *header,
562 const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr,
565 const int rate = 11000000;
567 header->frame_control = htons (IEEE80211_FC0_TYPE_DATA);
568 header->addr1 = *to_mac_addr;
569 header->addr2 = plugin->mac_address;
570 header->addr3 = mac_bssid_gnunet;
571 header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290);
572 header->sequence_control = 0; // FIXME?
573 header->llc[0] = WLAN_LLC_DSAP_FIELD;
574 header->llc[1] = WLAN_LLC_SSAP_FIELD;
575 header->llc[2] = 0; // FIXME?
576 header->llc[3] = 0; // FIXME?
581 * Send an ACK for a fragment we received.
583 * @param cls the 'struct MacEndpoint' the ACK must be sent to
584 * @param msg_id id of the message
585 * @param hdr pointer to the hdr where the ack is stored
588 send_ack (void *cls, uint32_t msg_id,
589 const struct GNUNET_MessageHeader *hdr)
591 struct MacEndpoint *endpoint = cls;
592 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage* radio_header;
593 uint16_t msize = ntohs (hdr->size);
594 size_t size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize;
597 if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
602 LOG (GNUNET_ERROR_TYPE_DEBUG,
603 "Sending ACK to helper\n");
604 radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf;
605 get_radiotap_header (endpoint, radio_header, size);
606 get_wlan_header (endpoint->plugin,
607 &radio_header->frame,
610 memcpy (&radio_header[1], hdr, msize);
612 GNUNET_HELPER_send (endpoint->plugin->suid_helper,
613 &radio_header->header,
614 GNUNET_NO /* dropping ACKs is bad */,
616 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth ACKs sent"),
622 * Handles the data after all fragments are put together
624 * @param cls macendpoint this messages belongs to
625 * @param hdr pointer to the data
628 bluetooth_data_message_handler (void *cls, const struct GNUNET_MessageHeader *hdr)
630 struct MacEndpoint *endpoint = cls;
631 struct Plugin *plugin = endpoint->plugin;
632 struct MacAndSession mas;
634 GNUNET_STATISTICS_update (plugin->env->stats,
635 _("# Bluetooth messages defragmented"), 1,
638 mas.endpoint = endpoint;
639 (void) GNUNET_SERVER_mst_receive (plugin->fragment_data_tokenizer,
643 GNUNET_YES, GNUNET_NO);
650 * @param session the session free
653 free_session (struct Session *session)
655 struct MacEndpoint *endpoint = session->mac;
656 struct PendingMessage *pm;
658 endpoint->plugin->env->session_end (endpoint->plugin->env->cls,
661 while (NULL != (pm = session->pending_message_head))
663 GNUNET_CONTAINER_DLL_remove (session->pending_message_head,
664 session->pending_message_tail, pm);
665 if (GNUNET_SCHEDULER_NO_TASK != pm->timeout_task)
667 GNUNET_SCHEDULER_cancel (pm->timeout_task);
668 pm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
670 GNUNET_free (pm->msg);
673 GNUNET_CONTAINER_DLL_remove (endpoint->sessions_head,
674 endpoint->sessions_tail,
676 if (session->timeout_task != GNUNET_SCHEDULER_NO_TASK)
678 GNUNET_SCHEDULER_cancel (session->timeout_task);
679 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
681 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), -1,
683 GNUNET_free (session);
688 * A session is timing out. Clean up.
690 * @param cls pointer to the Session
691 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
694 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
696 struct Session * session = cls;
697 struct GNUNET_TIME_Relative timeout;
699 session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
700 timeout = GNUNET_TIME_absolute_get_remaining (session->timeout);
701 if (0 == timeout.rel_value_us)
703 free_session (session);
706 session->timeout_task =
707 GNUNET_SCHEDULER_add_delayed (timeout, &session_timeout, session);
712 * Create a new session
714 * @param endpoint pointer to the mac endpoint of the peer
715 * @param peer peer identity to use for this session
716 * @return returns the session
718 static struct Session *
719 create_session (struct MacEndpoint *endpoint,
720 const struct GNUNET_PeerIdentity *peer)
722 struct Session *session;
724 for (session = endpoint->sessions_head; NULL != session; session = session->next)
725 if (0 == memcmp (peer, &session->target,
726 sizeof (struct GNUNET_PeerIdentity)))
728 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
731 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), 1,
733 session = GNUNET_malloc (sizeof (struct Session));
734 GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head,
735 endpoint->sessions_tail,
737 session->mac = endpoint;
738 session->target = *peer;
739 session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
740 session->timeout_task =
741 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, &session_timeout, session);
742 LOG (GNUNET_ERROR_TYPE_DEBUG,
743 "Created new session for peer `%s' with endpoint %s\n",
745 mac_to_string (&endpoint->addr.mac));
751 * Function called once we have successfully given the fragment
752 * message to the SUID helper process and we are thus ready for
755 * @param cls the 'struct FragmentMessage'
756 * @param result result of the operation (GNUNET_OK on success, GNUNET_NO if the helper died, GNUNET_SYSERR
757 * if the helper was stopped)
760 fragment_transmission_done (void *cls,
763 struct FragmentMessage *fm = cls;
767 GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
772 * Transmit a fragment of a message.
774 * @param cls 'struct FragmentMessage' this fragment message belongs to
775 * @param hdr pointer to the start of the fragment message
778 transmit_fragment (void *cls,
779 const struct GNUNET_MessageHeader *hdr)
781 struct FragmentMessage *fm = cls;
782 struct MacEndpoint *endpoint = fm->macendpoint;
786 msize = ntohs (hdr->size);
787 size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize;
790 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radio_header;
792 radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf;
793 get_radiotap_header (endpoint, radio_header, size);
794 get_wlan_header (endpoint->plugin,
795 &radio_header->frame,
798 memcpy (&radio_header[1], hdr, msize);
799 GNUNET_assert (NULL == fm->sh);
800 fm->sh = GNUNET_HELPER_send (endpoint->plugin->suid_helper,
801 &radio_header->header,
803 &fragment_transmission_done, fm);
804 fm->size_on_wire += size;
806 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth message fragments sent"),
809 GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
810 GNUNET_STATISTICS_update (endpoint->plugin->env->stats,
811 "# bytes currently in Bluetooth buffers",
813 GNUNET_STATISTICS_update (endpoint->plugin->env->stats,
814 "# bytes transmitted via Bluetooth",
821 * Frees the space of a message in the fragment queue (send queue)
823 * @param fm message to free
826 free_fragment_message (struct FragmentMessage *fm)
828 struct MacEndpoint *endpoint = fm->macendpoint;
830 GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth messages pending (with fragmentation)"),
832 GNUNET_CONTAINER_DLL_remove (endpoint->sending_messages_head,
833 endpoint->sending_messages_tail, fm);
836 GNUNET_HELPER_send_cancel (fm->sh);
839 GNUNET_FRAGMENT_context_destroy (fm->fragcontext,
840 &endpoint->msg_delay,
841 &endpoint->ack_delay);
842 if (fm->timeout_task != GNUNET_SCHEDULER_NO_TASK)
844 GNUNET_SCHEDULER_cancel (fm->timeout_task);
845 fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
852 * A FragmentMessage has timed out. Remove it.
854 * @param cls pointer to the 'struct FragmentMessage'
855 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
858 fragmentmessage_timeout (void *cls,
859 const struct GNUNET_SCHEDULER_TaskContext *tc)
861 struct FragmentMessage *fm = cls;
863 fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
864 if (NULL != fm->cont)
866 fm->cont (fm->cont_cls, &fm->target, GNUNET_SYSERR, fm->size_payload, fm->size_on_wire);
869 free_fragment_message (fm);
874 * Transmit a message to the given destination with fragmentation.
876 * @param endpoint desired destination
877 * @param timeout how long can the message wait?
878 * @param target peer that should receive the message
879 * @param msg message to transmit
880 * @param payload_size bytes of payload
881 * @param cont continuation to call once the message has
882 * been transmitted (or if the transport is ready
883 * for the next transmission call; or if the
884 * peer disconnected...); can be NULL
885 * @param cont_cls closure for cont
888 send_with_fragmentation (struct MacEndpoint *endpoint,
889 struct GNUNET_TIME_Relative timeout,
890 const struct GNUNET_PeerIdentity *target,
891 const struct GNUNET_MessageHeader *msg,
893 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
896 struct FragmentMessage *fm;
897 struct Plugin *plugin;
899 plugin = endpoint->plugin;
900 fm = GNUNET_malloc (sizeof (struct FragmentMessage));
901 fm->macendpoint = endpoint;
902 fm->target = *target;
903 fm->size_payload = payload_size;
904 fm->size_on_wire = 0;
905 fm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
907 fm->cont_cls = cont_cls;
908 /* 1 MBit/s typical data rate, 1430 byte fragments => ~100 ms per message */
910 GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
915 &transmit_fragment, fm);
917 GNUNET_SCHEDULER_add_delayed (timeout,
918 &fragmentmessage_timeout, fm);
919 GNUNET_CONTAINER_DLL_insert_tail (endpoint->sending_messages_head,
920 endpoint->sending_messages_tail,
926 * Free a MAC endpoint.
928 * @param endpoint pointer to the MacEndpoint to free
931 free_macendpoint (struct MacEndpoint *endpoint)
933 struct Plugin *plugin = endpoint->plugin;
934 struct FragmentMessage *fm;
935 struct Session *session;
937 GNUNET_STATISTICS_update (plugin->env->stats,
938 _("# Bluetooth MAC endpoints allocated"), -1, GNUNET_NO);
939 while (NULL != (session = endpoint->sessions_head))
940 free_session (session);
941 while (NULL != (fm = endpoint->sending_messages_head))
942 free_fragment_message (fm);
943 GNUNET_CONTAINER_DLL_remove (plugin->mac_head,
947 if (NULL != endpoint->defrag)
949 GNUNET_DEFRAGMENT_context_destroy(endpoint->defrag);
950 endpoint->defrag = NULL;
954 if (GNUNET_SCHEDULER_NO_TASK != endpoint->timeout_task)
956 GNUNET_SCHEDULER_cancel (endpoint->timeout_task);
957 endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
959 GNUNET_free (endpoint);
964 * A MAC endpoint is timing out. Clean up.
966 * @param cls pointer to the MacEndpoint
967 * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
970 macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
972 struct MacEndpoint *endpoint = cls;
973 struct GNUNET_TIME_Relative timeout;
975 endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
976 timeout = GNUNET_TIME_absolute_get_remaining (endpoint->timeout);
977 if (0 == timeout.rel_value_us)
979 free_macendpoint (endpoint);
982 endpoint->timeout_task =
983 GNUNET_SCHEDULER_add_delayed (timeout, &macendpoint_timeout,
989 * Find (or create) a MacEndpoint with a specific MAC address
991 * @param plugin pointer to the plugin struct
992 * @param addr the MAC address of the endpoint
993 * @return handle to our data structure for this MAC
995 static struct MacEndpoint *
996 create_macendpoint (struct Plugin *plugin,
997 const struct WlanAddress *addr)
999 struct MacEndpoint *pos;
1001 for (pos = plugin->mac_head; NULL != pos; pos = pos->next)
1002 if (0 == memcmp (addr, &pos->addr, sizeof (struct WlanAddress)))
1004 pos = GNUNET_malloc (sizeof (struct MacEndpoint));
1006 pos->plugin = plugin;
1008 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
1009 MESSAGES_IN_DEFRAG_QUEUE_PER_MAC,
1011 &bluetooth_data_message_handler,
1014 pos->msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1015 pos->ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1017 pos->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT);
1019 GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout,
1021 GNUNET_CONTAINER_DLL_insert (plugin->mac_head, plugin->mac_tail, pos);
1022 plugin->mac_count++;
1023 GNUNET_STATISTICS_update (plugin->env->stats, _("# Bluetooth MAC endpoints allocated"),
1025 LOG (GNUNET_ERROR_TYPE_DEBUG,
1026 "New MAC endpoint `%s'\n",
1027 bluetooth_plugin_address_to_string(NULL, addr, sizeof (struct WlanAddress)));
1033 * Function obtain the network type for a session
1035 * @param cls closure ('struct Plugin*')
1036 * @param session the session
1037 * @return the network type in HBO or GNUNET_SYSERR
1039 static enum GNUNET_ATS_Network_Type
1040 bluetooth_get_network (void *cls,
1041 struct Session *session)
1043 GNUNET_assert (NULL != session);
1044 return GNUNET_ATS_NET_BT;
1049 * Creates a new outbound session the transport service will use to send data to the
1052 * @param cls the plugin
1053 * @param address the address
1054 * @return the session or NULL of max connections exceeded
1056 static struct Session *
1057 bluetooth_plugin_get_session (void *cls,
1058 const struct GNUNET_HELLO_Address *address)
1060 struct Plugin *plugin = cls;
1061 struct MacEndpoint *endpoint;
1063 if (NULL == address)
1065 if (sizeof (struct WlanAddress) != address->address_length)
1070 LOG (GNUNET_ERROR_TYPE_DEBUG,
1071 "Service asked to create session for peer `%s' with MAC `%s'\n",
1072 GNUNET_i2s (&address->peer),
1073 bluetooth_plugin_address_to_string(NULL, address->address, address->address_length));
1074 endpoint = create_macendpoint (plugin, address->address);
1075 return create_session (endpoint, &address->peer);
1080 * Function that can be used to force the plugin to disconnect
1081 * from the given peer and cancel all previous transmissions
1082 * (and their continuation).
1084 * @param cls closure
1085 * @param target peer from which to disconnect
1088 bluetooth_plugin_disconnect_peer (void *cls, const struct GNUNET_PeerIdentity *target)
1090 struct Plugin *plugin = cls;
1091 struct Session *session;
1092 struct MacEndpoint *endpoint;
1094 for (endpoint = plugin->mac_head; NULL != endpoint; endpoint = endpoint->next)
1095 for (session = endpoint->sessions_head; NULL != session; session = session->next)
1096 if (0 == memcmp (target, &session->target,
1097 sizeof (struct GNUNET_PeerIdentity)))
1099 free_session (session);
1100 break; /* inner-loop only (in case peer has another MAC as well!) */
1106 * Function that can be used to force the plugin to disconnect
1107 * from the given peer and cancel all previous transmissions
1108 * (and their continuation).
1110 * @param cls closure
1111 * @param session session to disconnect
1114 bluetooth_plugin_disconnect_session (void *cls,
1115 struct Session *session)
1117 free_session (session);
1123 * Function that can be used by the transport service to transmit
1124 * a message using the plugin. Note that in the case of a
1125 * peer disconnecting, the continuation MUST be called
1126 * prior to the disconnect notification itself. This function
1127 * will be called with this peer's HELLO message to initiate
1128 * a fresh connection to another peer.
1130 * @param cls closure
1131 * @param session which session must be used
1132 * @param msgbuf the message to transmit
1133 * @param msgbuf_size number of bytes in 'msgbuf'
1134 * @param priority how important is the message (most plugins will
1135 * ignore message priority and just FIFO)
1136 * @param to how long to wait at most for the transmission (does not
1137 * require plugins to discard the message after the timeout,
1138 * just advisory for the desired delay; most plugins will ignore
1140 * @param cont continuation to call once the message has
1141 * been transmitted (or if the transport is ready
1142 * for the next transmission call; or if the
1143 * peer disconnected...); can be NULL
1144 * @param cont_cls closure for cont
1145 * @return number of bytes used (on the physical network, with overheads);
1146 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1147 * and does NOT mean that the message was not transmitted (DV)
1150 bluetooth_plugin_send (void *cls,
1151 struct Session *session,
1152 const char *msgbuf, size_t msgbuf_size,
1153 unsigned int priority,
1154 struct GNUNET_TIME_Relative to,
1155 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1157 struct Plugin *plugin = cls;
1158 struct WlanHeader *wlanheader;
1159 size_t size = msgbuf_size + sizeof (struct WlanHeader);
1160 char buf[size] GNUNET_ALIGN;
1162 LOG (GNUNET_ERROR_TYPE_DEBUG,
1163 "Transmitting %u bytes of payload to peer `%s' (starting with %u byte message of type %u)\n",
1165 GNUNET_i2s (&session->target),
1166 (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->size),
1167 (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->type));
1168 wlanheader = (struct WlanHeader *) buf;
1169 wlanheader->header.size = htons (msgbuf_size + sizeof (struct WlanHeader));
1170 wlanheader->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA);
1171 wlanheader->sender = *plugin->env->my_identity;
1172 wlanheader->target = session->target;
1173 wlanheader->crc = htonl (GNUNET_CRYPTO_crc32_n (msgbuf, msgbuf_size));
1174 memcpy (&wlanheader[1], msgbuf, msgbuf_size);
1176 GNUNET_STATISTICS_update (plugin->env->stats,
1177 "# bytes currently in Bluetooth buffers",
1178 msgbuf_size, GNUNET_NO);
1180 send_with_fragmentation (session->mac,
1183 &wlanheader->header,
1191 * We have received data from the WLAN via some session. Process depending
1192 * on the message type (HELLO, DATA, FRAGMENTATION or FRAGMENTATION-ACK).
1194 * @param cls pointer to the plugin
1195 * @param client pointer to the session this message belongs to
1196 * @param hdr start of the message
1199 process_data (void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
1201 struct Plugin *plugin = cls;
1202 struct MacAndSession *mas = client;
1203 struct MacAndSession xmas;
1204 struct GNUNET_ATS_Information ats;
1205 struct FragmentMessage *fm;
1206 struct GNUNET_PeerIdentity tmpsource;
1207 const struct WlanHeader *wlanheader;
1211 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
1212 ats.value = htonl (GNUNET_ATS_NET_BT);
1213 msize = ntohs (hdr->size);
1215 GNUNET_STATISTICS_update (plugin->env->stats,
1216 "# bytes received via Bluetooth",
1219 switch (ntohs (hdr->type))
1221 case GNUNET_MESSAGE_TYPE_HELLO:
1223 GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hdr, &tmpsource))
1225 GNUNET_break_op (0);
1228 LOG (GNUNET_ERROR_TYPE_DEBUG,
1229 "Processing %u bytes of HELLO from peer `%s' at MAC %s\n",
1230 (unsigned int) msize,
1231 GNUNET_i2s (&tmpsource),
1232 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr, sizeof (struct WlanAddress)));
1234 GNUNET_STATISTICS_update (plugin->env->stats,
1235 _("# HELLO messages received via Bluetooth"), 1,
1237 plugin->env->receive (plugin->env->cls,
1241 (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
1242 (mas->endpoint == NULL) ? 0 : sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
1243 plugin->env->update_address_metrics (plugin->env->cls,
1245 (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
1246 (mas->endpoint == NULL) ? 0 : sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress),
1250 case GNUNET_MESSAGE_TYPE_FRAGMENT:
1251 if (NULL == mas->endpoint)
1256 LOG (GNUNET_ERROR_TYPE_DEBUG,
1257 "Processing %u bytes of FRAGMENT from MAC %s\n",
1258 (unsigned int) msize,
1259 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr, sizeof (struct WlanAddress)));
1260 GNUNET_STATISTICS_update (plugin->env->stats,
1261 _("# fragments received via Bluetooth"), 1, GNUNET_NO);
1262 (void) GNUNET_DEFRAGMENT_process_fragment (mas->endpoint->defrag,
1265 case GNUNET_MESSAGE_TYPE_FRAGMENT_ACK:
1266 if (NULL == mas->endpoint)
1271 GNUNET_STATISTICS_update (plugin->env->stats, _("# ACKs received via Bluetooth"),
1273 for (fm = mas->endpoint->sending_messages_head; NULL != fm; fm = fm->next)
1275 ret = GNUNET_FRAGMENT_process_ack (fm->fragcontext, hdr);
1276 if (GNUNET_OK == ret)
1278 LOG (GNUNET_ERROR_TYPE_DEBUG,
1279 "Got last ACK, finished message transmission to `%s' (%p)\n",
1280 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr, sizeof (struct WlanAddress)),
1282 mas->endpoint->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT);
1283 if (NULL != fm->cont)
1285 fm->cont (fm->cont_cls, &fm->target, GNUNET_OK, fm->size_payload, fm->size_on_wire);
1288 free_fragment_message (fm);
1291 if (GNUNET_NO == ret)
1293 LOG (GNUNET_ERROR_TYPE_DEBUG,
1294 "Got an ACK, message transmission to `%s' not yet finished\n",
1295 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr, sizeof (struct WlanAddress)));
1299 LOG (GNUNET_ERROR_TYPE_DEBUG,
1300 "ACK not matched against any active fragmentation with MAC `%s'\n",
1301 bluetooth_plugin_address_to_string (NULL, &mas->endpoint->addr, sizeof (struct WlanAddress)));
1303 case GNUNET_MESSAGE_TYPE_WLAN_DATA:
1304 if (NULL == mas->endpoint)
1309 if (msize < sizeof (struct WlanHeader))
1314 wlanheader = (const struct WlanHeader *) hdr;
1315 if (0 != memcmp (&wlanheader->target,
1316 plugin->env->my_identity,
1317 sizeof (struct GNUNET_PeerIdentity)))
1319 LOG (GNUNET_ERROR_TYPE_DEBUG,
1320 "Bluetooth data for `%s', not for me, ignoring\n",
1321 GNUNET_i2s (&wlanheader->target));
1324 if (ntohl (wlanheader->crc) !=
1325 GNUNET_CRYPTO_crc32_n (&wlanheader[1], msize - sizeof (struct WlanHeader)))
1327 GNUNET_STATISTICS_update (plugin->env->stats,
1328 _("# Bluetooth DATA messages discarded due to CRC32 error"), 1,
1332 xmas.endpoint = mas->endpoint;
1333 xmas.session = create_session (mas->endpoint, &wlanheader->sender);
1334 LOG (GNUNET_ERROR_TYPE_DEBUG,
1335 "Processing %u bytes of BLUETOOTH DATA from peer `%s'\n",
1336 (unsigned int) msize,
1337 GNUNET_i2s (&wlanheader->sender));
1338 (void) GNUNET_SERVER_mst_receive (plugin->wlan_header_payload_tokenizer,
1340 (const char *) &wlanheader[1],
1341 msize - sizeof (struct WlanHeader),
1342 GNUNET_YES, GNUNET_NO);
1345 if (NULL == mas->endpoint)
1350 if (NULL == mas->session)
1355 LOG (GNUNET_ERROR_TYPE_DEBUG,
1356 "Received packet with %u bytes of type %u from peer %s\n",
1357 (unsigned int) msize,
1358 (unsigned int) ntohs (hdr->type),
1359 GNUNET_i2s (&mas->session->target));
1360 plugin->env->receive (plugin->env->cls,
1361 &mas->session->target,
1364 (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
1365 (mas->endpoint == NULL) ? 0 : sizeof (struct WlanAddress));
1366 plugin->env->update_address_metrics (plugin->env->cls,
1367 &mas->session->target,
1368 (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
1369 (mas->endpoint == NULL) ? 0 : sizeof (struct WlanAddress),
1379 * Function used for to process the data from the suid process
1381 * @param cls the plugin handle
1382 * @param client client that send the data (not used)
1383 * @param hdr header of the GNUNET_MessageHeader
1386 handle_helper_message (void *cls, void *client,
1387 const struct GNUNET_MessageHeader *hdr)
1389 struct Plugin *plugin = cls;
1390 const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *rxinfo;
1391 const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *cm;
1392 struct WlanAddress wa;
1393 struct MacAndSession mas;
1396 msize = ntohs (hdr->size);
1397 switch (ntohs (hdr->type))
1399 case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL:
1400 if (msize != sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage))
1405 cm = (const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *) hdr;
1406 if (GNUNET_YES == plugin->have_mac)
1408 if (0 == memcmp (&plugin->mac_address,
1410 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1411 break; /* no change */
1412 /* remove old address */
1413 memset (&wa, 0, sizeof (struct WlanAddress));
1414 wa.mac = plugin->mac_address;
1415 wa.options = htonl(plugin->options);
1416 plugin->env->notify_address (plugin->env->cls, GNUNET_NO,
1421 plugin->mac_address = cm->mac;
1422 plugin->have_mac = GNUNET_YES;
1423 memset (&wa, 0, sizeof (struct WlanAddress));
1424 wa.mac = plugin->mac_address;
1425 wa.options = htonl(plugin->options);
1426 LOG (GNUNET_ERROR_TYPE_DEBUG,
1427 "Received BT_HELPER_CONTROL message with MAC address `%s' for peer `%s'\n",
1428 mac_to_string (&cm->mac),
1429 GNUNET_i2s (plugin->env->my_identity));
1430 plugin->env->notify_address (plugin->env->cls, GNUNET_YES,
1432 sizeof (struct WlanAddress),
1435 case GNUNET_MESSAGE_TYPE_WLAN_DATA_FROM_HELPER:
1436 LOG (GNUNET_ERROR_TYPE_DEBUG,
1437 "Got data message from helper with %u bytes\n",
1439 GNUNET_STATISTICS_update (plugin->env->stats,
1440 _("# DATA messages received via Bluetooth"), 1,
1442 if (msize < sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage))
1445 LOG (GNUNET_ERROR_TYPE_DEBUG,
1446 "Size of packet is too small (%u bytes)\n",
1450 rxinfo = (const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *) hdr;
1452 /* check if message is actually for us */
1453 if (0 != memcmp (&rxinfo->frame.addr3, &mac_bssid_gnunet,
1454 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1456 /* Not the GNUnet BSSID */
1459 if ( (0 != memcmp (&rxinfo->frame.addr1, &bc_all_mac,
1460 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) &&
1461 (0 != memcmp (&rxinfo->frame.addr1, &plugin->mac_address,
1462 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) )
1464 /* Neither broadcast nor specifically for us */
1467 if (0 == memcmp (&rxinfo->frame.addr2, &plugin->mac_address,
1468 sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
1470 /* packet is FROM us, thus not FOR us */
1474 GNUNET_STATISTICS_update (plugin->env->stats,
1475 _("# Bluetooth DATA messages processed"),
1477 LOG (GNUNET_ERROR_TYPE_DEBUG,
1478 "Receiving %u bytes of data from MAC `%s'\n",
1479 (unsigned int) (msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage)),
1480 mac_to_string (&rxinfo->frame.addr2));
1481 wa.mac = rxinfo->frame.addr2;
1482 wa.options = htonl (0);
1483 mas.endpoint = create_macendpoint (plugin, &wa);
1485 (void) GNUNET_SERVER_mst_receive (plugin->helper_payload_tokenizer,
1487 (const char*) &rxinfo[1],
1488 msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage),
1489 GNUNET_YES, GNUNET_NO);
1493 LOG (GNUNET_ERROR_TYPE_DEBUG,
1494 "Unexpected message of type %u (%u bytes)",
1495 ntohs (hdr->type), ntohs (hdr->size));
1504 * Task to (periodically) send a HELLO beacon
1506 * @param cls pointer to the plugin struct
1507 * @param tc scheduler context
1510 send_hello_beacon (void *cls,
1511 const struct GNUNET_SCHEDULER_TaskContext *tc)
1513 struct Plugin *plugin = cls;
1515 uint16_t hello_size;
1516 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radioHeader;
1517 const struct GNUNET_MessageHeader *hello;
1519 hello = plugin->env->get_our_hello ();
1520 hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello);
1521 GNUNET_assert (sizeof (struct WlanHeader) + hello_size <= WLAN_MTU);
1522 size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + hello_size;
1524 char buf[size] GNUNET_ALIGN;
1526 LOG (GNUNET_ERROR_TYPE_DEBUG,
1527 "Sending %u byte HELLO beacon\n",
1528 (unsigned int) size);
1529 radioHeader = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage*) buf;
1530 get_radiotap_header (NULL, radioHeader, size);
1531 get_wlan_header (plugin, &radioHeader->frame, &bc_all_mac, size);
1532 memcpy (&radioHeader[1], hello, hello_size);
1534 GNUNET_HELPER_send (plugin->suid_helper,
1535 &radioHeader->header,
1536 GNUNET_YES /* can drop */,
1538 GNUNET_STATISTICS_update (plugin->env->stats, _("# HELLO beacons sent via Bluetooth"),
1541 plugin->beacon_task =
1542 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
1543 (HELLO_BEACON_SCALING_FACTOR,
1544 plugin->mac_count + 1),
1552 * Another peer has suggested an address for this
1553 * peer and transport plugin. Check that this could be a valid
1554 * address. If so, consider adding it to the list
1557 * @param cls closure
1558 * @param addr pointer to the address
1559 * @param addrlen length of addr
1560 * @return GNUNET_OK if this is a plausible address for this peer
1564 bluetooth_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
1566 struct Plugin *plugin = cls;
1567 struct WlanAddress *wa = (struct WlanAddress *) addr;
1569 if (addrlen != sizeof (struct WlanAddress))
1571 GNUNET_break_op (0);
1572 return GNUNET_SYSERR;
1574 if (GNUNET_YES != plugin->have_mac)
1576 LOG (GNUNET_ERROR_TYPE_DEBUG,
1577 "Rejecting MAC `%s': I don't know my MAC!\n",
1578 mac_to_string (addr));
1579 return GNUNET_NO; /* don't know my MAC */
1581 if (0 != memcmp (&wa->mac,
1582 &plugin->mac_address,
1585 LOG (GNUNET_ERROR_TYPE_DEBUG,
1586 "Rejecting MAC `%s': not my MAC!\n",
1587 mac_to_string (addr));
1588 return GNUNET_NO; /* not my MAC */
1595 * Function called for a quick conversion of the binary address to
1596 * a numeric address. Note that the caller must not free the
1597 * address and that the next call to this function is allowed
1598 * to override the address again.
1600 * @param cls closure
1601 * @param addr binary address
1602 * @param addrlen length of the address
1603 * @return string representing the same address
1606 bluetooth_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
1608 const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac;
1609 static char macstr[36];
1611 if (sizeof (struct WlanAddress) != addrlen)
1616 mac = &((struct WlanAddress *) addr)->mac;
1617 GNUNET_snprintf (macstr, sizeof (macstr), "%s.%u.%s",
1618 PLUGIN_NAME, ntohl (((struct WlanAddress *) addr)->options),
1619 mac_to_string (mac));
1625 * Convert the transports address to a nice, human-readable format.
1627 * @param cls closure
1628 * @param type name of the transport that generated the address
1629 * @param addr one of the addresses of the host, NULL for the last address
1630 * the specific address format depends on the transport
1631 * @param addrlen length of the address
1632 * @param numeric should (IP) addresses be displayed in numeric form?
1633 * @param timeout after how long should we give up?
1634 * @param asc function to call on each string
1635 * @param asc_cls closure for asc
1638 bluetooth_plugin_address_pretty_printer (void *cls, const char *type,
1639 const void *addr, size_t addrlen,
1641 struct GNUNET_TIME_Relative timeout,
1642 GNUNET_TRANSPORT_AddressStringCallback asc,
1647 if (sizeof (struct WlanAddress) != addrlen)
1649 /* invalid address */
1650 LOG (GNUNET_ERROR_TYPE_WARNING,
1651 _("Bluetooth address with invalid size encountered\n"));
1652 asc (asc_cls, NULL);
1655 ret = GNUNET_strdup (bluetooth_plugin_address_to_string(NULL, addr, addrlen));
1658 asc (asc_cls, NULL);
1663 * Exit point from the plugin.
1665 * @param cls pointer to the api struct
1668 libgnunet_plugin_transport_bluetooth_done (void *cls)
1670 struct WlanAddress wa;
1671 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1672 struct Plugin *plugin = api->cls;
1673 struct MacEndpoint *endpoint;
1674 struct MacEndpoint *endpoint_next;
1682 if (GNUNET_YES == plugin->have_mac)
1684 memset (&wa, 0, sizeof (wa));
1685 wa.options = htonl (plugin->options);
1686 wa.mac = plugin->mac_address;
1687 plugin->env->notify_address (plugin->env->cls, GNUNET_NO,
1689 sizeof (struct WlanAddress),
1691 plugin->have_mac = GNUNET_NO;
1694 if (GNUNET_SCHEDULER_NO_TASK != plugin->beacon_task)
1696 GNUNET_SCHEDULER_cancel (plugin->beacon_task);
1697 plugin->beacon_task = GNUNET_SCHEDULER_NO_TASK;
1699 if (NULL != plugin->suid_helper)
1701 GNUNET_HELPER_stop (plugin->suid_helper, GNUNET_NO);
1702 plugin->suid_helper = NULL;
1704 endpoint_next = plugin->mac_head;
1705 while (NULL != (endpoint = endpoint_next))
1707 endpoint_next = endpoint->next;
1708 free_macendpoint (endpoint);
1710 if (NULL != plugin->fragment_data_tokenizer)
1712 GNUNET_SERVER_mst_destroy (plugin->fragment_data_tokenizer);
1713 plugin->fragment_data_tokenizer = NULL;
1715 if (NULL != plugin->wlan_header_payload_tokenizer)
1717 GNUNET_SERVER_mst_destroy (plugin->wlan_header_payload_tokenizer);
1718 plugin->wlan_header_payload_tokenizer = NULL;
1720 if (NULL != plugin->helper_payload_tokenizer)
1722 GNUNET_SERVER_mst_destroy (plugin->helper_payload_tokenizer);
1723 plugin->helper_payload_tokenizer = NULL;
1725 GNUNET_free_non_null (plugin->interface);
1726 GNUNET_free (plugin);
1733 * Function called to convert a string address to
1736 * @param cls closure ('struct Plugin*')
1737 * @param addr string address
1738 * @param addrlen length of the address
1739 * @param buf location to store the buffer
1740 * @param added location to store the number of bytes in the buffer.
1741 * If the function returns GNUNET_SYSERR, its contents are undefined.
1742 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1745 bluetooth_string_to_address (void *cls, const char *addr, uint16_t addrlen,
1746 void **buf, size_t *added)
1748 struct WlanAddress *wa;
1754 if ((NULL == addr) || (addrlen == 0))
1757 return GNUNET_SYSERR;
1759 if ('\0' != addr[addrlen - 1])
1762 return GNUNET_SYSERR;
1764 if (strlen (addr) != addrlen - 1)
1767 return GNUNET_SYSERR;
1770 if (8 != SSCANF (addr,
1771 "%9s.%u.%X:%X:%X:%X:%X:%X",
1773 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]))
1776 return GNUNET_SYSERR;
1778 wa = GNUNET_malloc (sizeof (struct WlanAddress));
1780 wa->mac.mac[i] = a[i];
1781 wa->options = htonl (0);
1783 *added = sizeof (struct WlanAddress);
1789 * Entry point for the plugin.
1791 * @param cls closure, the 'struct GNUNET_TRANSPORT_PluginEnvironment*'
1792 * @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error
1795 libgnunet_plugin_transport_bluetooth_init (void *cls)
1797 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1798 struct GNUNET_TRANSPORT_PluginFunctions *api;
1799 struct Plugin *plugin;
1801 unsigned long long testmode;
1804 /* check for 'special' mode */
1805 if (NULL == env->receive)
1807 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1808 initialze the plugin or the API */
1809 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1811 api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer;
1812 api->address_to_string = &bluetooth_plugin_address_to_string;
1813 api->string_to_address = &bluetooth_string_to_address;
1818 /* check configuration */
1820 GNUNET_CONFIGURATION_have_value (env->cfg, "transport-bluetooth", "TESTMODE")) &&
1822 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-bluetooth",
1823 "TESTMODE", &testmode)) ||
1826 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1827 "transport-bluetooth", "TESTMODE");
1830 binary = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-transport-bluetooth");
1831 if ( (0 == testmode) &&
1832 (GNUNET_YES != GNUNET_OS_check_helper_binary (binary, GNUNET_YES, NULL)) )
1834 LOG (GNUNET_ERROR_TYPE_ERROR,
1835 _("Helper binary `%s' not SUID, cannot run bluetooth transport\n"),
1836 "gnunet-helper-transport-bluetooth");
1837 GNUNET_free (binary);
1840 GNUNET_free (binary);
1842 GNUNET_CONFIGURATION_get_value_string
1843 (env->cfg, "transport-bluetooth", "INTERFACE",
1846 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1847 "transport-bluetooth", "INTERFACE");
1851 plugin = GNUNET_malloc (sizeof (struct Plugin));
1852 plugin->interface = interface;
1854 GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth sessions allocated"),
1856 GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth MAC endpoints allocated"),
1858 GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
1859 GNUNET_BANDWIDTH_value_init (100 * 1024 *
1861 plugin->fragment_data_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1862 plugin->wlan_header_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1863 plugin->helper_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin);
1864 plugin->beacon_task = GNUNET_SCHEDULER_add_now (&send_hello_beacon,
1867 plugin->options = 0;
1869 /* some compilers do not like switch on 'long long'... */
1870 switch ((unsigned int) testmode)
1872 case 0: /* normal */
1873 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-bluetooth";
1874 plugin->helper_argv[1] = interface;
1875 plugin->helper_argv[2] = NULL;
1876 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1877 "gnunet-helper-transport-bluetooth",
1878 plugin->helper_argv,
1879 &handle_helper_message,
1883 case 1: /* testmode, peer 1 */
1884 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy";
1885 plugin->helper_argv[1] = (char *) "1";
1886 plugin->helper_argv[2] = NULL;
1887 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1888 "gnunet-helper-transport-wlan-dummy",
1889 plugin->helper_argv,
1890 &handle_helper_message,
1894 case 2: /* testmode, peer 2 */
1895 plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy";
1896 plugin->helper_argv[1] = (char *) "2";
1897 plugin->helper_argv[2] = NULL;
1898 plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO,
1899 "gnunet-helper-transport-wlan-dummy",
1900 plugin->helper_argv,
1901 &handle_helper_message,
1909 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1911 api->send = &bluetooth_plugin_send;
1912 api->get_session = &bluetooth_plugin_get_session;
1913 api->disconnect_peer = &bluetooth_plugin_disconnect_peer;
1914 api->disconnect_session = &bluetooth_plugin_disconnect_session;
1915 api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer;
1916 api->check_address = &bluetooth_plugin_address_suggested;
1917 api->address_to_string = &bluetooth_plugin_address_to_string;;
1918 api->string_to_address = &bluetooth_string_to_address;
1919 api->get_network = &bluetooth_get_network;
1925 /* end of plugin_transport_bluetooth.c */