From ec2261d8e4c25310e4621bf69628c1c0396444fb Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Wed, 25 Jun 2014 20:22:58 +0000 Subject: combine sources for wlan and bluetooth plugin logic into one file --- src/transport/plugin_transport_bluetooth.c | 2052 ---------------------------- 1 file changed, 2052 deletions(-) delete mode 100644 src/transport/plugin_transport_bluetooth.c (limited to 'src/transport/plugin_transport_bluetooth.c') diff --git a/src/transport/plugin_transport_bluetooth.c b/src/transport/plugin_transport_bluetooth.c deleted file mode 100644 index e5f80e466..000000000 --- a/src/transport/plugin_transport_bluetooth.c +++ /dev/null @@ -1,2052 +0,0 @@ -/* - This file is part of GNUnet - (C) 2010, 2011, 2012 Christian Grothoff (and other contributing authors) - - GNUnet is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GNUnet is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GNUnet; see the file COPYING. If not, write to the - Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. -*/ - -/** - * @file transport/plugin_transport_bluetooth.c - * @brief transport plugin for bluetooth - * @author David Brodski - * @author Christian Grothoff - * - * THIS IS A COPY OF plugin_transport_wlan.c - */ -#include "platform.h" -#include "gnunet_hello_lib.h" -#include "gnunet_protocols.h" -#include "gnunet_util_lib.h" -#include "gnunet_statistics_service.h" -#include "gnunet_transport_service.h" -#include "gnunet_transport_plugin.h" -#include "plugin_transport_wlan.h" -#include "gnunet_common.h" -#include "gnunet_crypto_lib.h" -#include "gnunet_fragmentation_lib.h" -#include "gnunet_constants.h" - -#ifdef MINGW - #undef interface -#endif - -#define LOG(kind,...) GNUNET_log_from (kind, "transport-bluetooth",__VA_ARGS__) - -#define PLUGIN_NAME "bluetooth" - -/** - * Max size of packet (that we give to the WLAN driver for transmission) - */ -#define WLAN_MTU 1430 - -/** - * time out of a mac endpoint - */ -#define MACENDPOINT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, 60) - -/** - * We reduce the frequence of HELLO beacons in relation to - * the number of MAC addresses currently visible to us. - * This is the multiplication factor. - */ -#define HELLO_BEACON_SCALING_FACTOR GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60) - -/** - * Maximum number of messages in defragmentation queue per MAC - */ -#define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 2 - -/** - * Link layer control fields for better compatibility - * (i.e. GNUnet over WLAN is not IP-over-WLAN). - */ -#define WLAN_LLC_DSAP_FIELD 0x1f -#define WLAN_LLC_SSAP_FIELD 0x1f - - -GNUNET_NETWORK_STRUCT_BEGIN -/** - * Header for messages which need fragmentation. This is the format of - * a message we obtain AFTER defragmentation. We then need to check - * the CRC and then tokenize the payload and pass it to the - * 'receive' callback. - */ -struct WlanHeader -{ - - /** - * Message type is #GNUNET_MESSAGE_TYPE_WLAN_DATA. - */ - struct GNUNET_MessageHeader header; - - /** - * CRC32 checksum (only over the payload), in NBO. - */ - uint32_t crc GNUNET_PACKED; - - /** - * Sender of the message. - */ - struct GNUNET_PeerIdentity sender; - - /** - * Target of the message. - */ - struct GNUNET_PeerIdentity target; - - /* followed by payload, possibly including - multiple messages! */ - -}; - - -struct WlanAddress -{ - uint32_t options GNUNET_PACKED; - - struct GNUNET_TRANSPORT_WLAN_MacAddress mac; -}; - - -GNUNET_NETWORK_STRUCT_END - - -/** - * Information kept for each message that is yet to be fragmented and - * transmitted. - */ -struct PendingMessage -{ - /** - * next entry in the DLL - */ - struct PendingMessage *next; - - /** - * previous entry in the DLL - */ - struct PendingMessage *prev; - - /** - * The pending message - */ - struct WlanHeader *msg; - - /** - * Continuation function to call once the message - * has been sent. Can be NULL if there is no - * continuation to call. - */ - GNUNET_TRANSPORT_TransmitContinuation transmit_cont; - - /** - * Cls for transmit_cont - */ - void *transmit_cont_cls; - - /** - * Timeout task (for this message). - */ - GNUNET_SCHEDULER_TaskIdentifier timeout_task; - -}; - - -/** - * Session handle for connections with other peers. - */ -struct Session -{ - /** - * To whom are we talking to (set to our identity - * if we are still waiting for the welcome message) - */ - struct GNUNET_PeerIdentity target; - - /** - * We keep all sessions in a DLL at their respective - * `struct MACEndpoint *`. - */ - struct Session *next; - - /** - * We keep all sessions in a DLL at their respective - * 'struct MACEndpoint'. - */ - struct Session *prev; - - /** - * MAC endpoint with the address of this peer. - */ - struct MacEndpoint *mac; - - /** - * The address for this session - */ - struct GNUNET_HELLO_Address *address; - - /** - * Head of messages currently pending for transmission to this peer. - */ - struct PendingMessage *pending_message_head; - - /** - * Tail of messages currently pending for transmission to this peer. - */ - struct PendingMessage *pending_message_tail; - - /** - * When should this session time out? - */ - struct GNUNET_TIME_Absolute timeout; - - /** - * Timeout task (for the session). - */ - GNUNET_SCHEDULER_TaskIdentifier timeout_task; - -}; - - -/** - * Struct for messages that are being fragmented in a MAC's transmission queue. - */ -struct FragmentMessage -{ - - /** - * This is a doubly-linked list. - */ - struct FragmentMessage *next; - - /** - * This is a doubly-linked list. - */ - struct FragmentMessage *prev; - - /** - * MAC endpoint this message belongs to - */ - struct MacEndpoint *macendpoint; - - /** - * Fragmentation context - */ - struct GNUNET_FRAGMENT_Context *fragcontext; - - /** - * Transmission handle to helper (to cancel if the frag context - * is destroyed early for some reason). - */ - struct GNUNET_HELPER_SendHandle *sh; - - /** - * Intended recipient. - */ - struct GNUNET_PeerIdentity target; - - /** - * Timeout value for the message. - */ - struct GNUNET_TIME_Absolute timeout; - - /** - * Timeout task. - */ - GNUNET_SCHEDULER_TaskIdentifier timeout_task; - - /** - * Continuation to call when we're done with this message. - */ - GNUNET_TRANSPORT_TransmitContinuation cont; - - /** - * Closure for @e cont. - */ - void *cont_cls; - - /** - * Size of original message - */ - size_t size_payload; - - /** - * Number of bytes used to transmit message - */ - size_t size_on_wire; - -}; - - -/** - * Struct to represent one network card connection - */ -struct MacEndpoint -{ - - /** - * We keep all MACs in a DLL in the plugin. - */ - struct MacEndpoint *next; - - /** - * We keep all MACs in a DLL in the plugin. - */ - struct MacEndpoint *prev; - - /** - * Pointer to the global plugin struct. - */ - struct Plugin *plugin; - - /** - * Head of sessions that use this MAC. - */ - struct Session *sessions_head; - - /** - * Tail of sessions that use this MAC. - */ - struct Session *sessions_tail; - - /** - * Head of messages we are currently sending to this MAC. - */ - struct FragmentMessage *sending_messages_head; - - /** - * Tail of messages we are currently sending to this MAC. - */ - struct FragmentMessage *sending_messages_tail; - - /** - * Defrag context for this MAC - */ - struct GNUNET_DEFRAGMENT_Context *defrag; - - /** - * When should this endpoint time out? - */ - struct GNUNET_TIME_Absolute timeout; - - /** - * Timeout task. - */ - GNUNET_SCHEDULER_TaskIdentifier timeout_task; - - /** - * peer mac address - */ - struct WlanAddress addr; - - /** - * Message delay for fragmentation context - */ - struct GNUNET_TIME_Relative msg_delay; - - /** - * ACK delay for fragmentation context - */ - struct GNUNET_TIME_Relative ack_delay; - - /** - * count of messages in the fragment out queue for this mac endpoint - */ - unsigned int fragment_messages_out_count; - - /** - * Desired transmission power for this MAC - */ - uint16_t tx_power; - - /** - * Desired transmission rate for this MAC - */ - uint8_t rate; - - /** - * Antenna we should use for this MAC - */ - uint8_t antenna; - -}; - - -/** - * Encapsulation of all of the state of the plugin. - */ -struct Plugin -{ - /** - * Our environment. - */ - struct GNUNET_TRANSPORT_PluginEnvironment *env; - - /** - * Handle to helper process for priviledged operations. - */ - struct GNUNET_HELPER_Handle *suid_helper; - - /** - * ARGV-vector for the helper (all helpers take only the binary - * name, one actual argument, plus the NULL terminator for 'argv'). - */ - char *helper_argv[3]; - - /** - * The interface of the wlan card given to us by the user. - */ - char *interface; - - /** - * Tokenizer for demultiplexing of data packets resulting from defragmentation. - */ - struct GNUNET_SERVER_MessageStreamTokenizer *fragment_data_tokenizer; - - /** - * Tokenizer for demultiplexing of data packets received from the suid helper - */ - struct GNUNET_SERVER_MessageStreamTokenizer *helper_payload_tokenizer; - - /** - * Tokenizer for demultiplexing of data packets that follow the WLAN Header - */ - struct GNUNET_SERVER_MessageStreamTokenizer *wlan_header_payload_tokenizer; - - /** - * Head of list of open connections. - */ - struct MacEndpoint *mac_head; - - /** - * Tail of list of open connections. - */ - struct MacEndpoint *mac_tail; - - /** - * Number of connections - */ - unsigned int mac_count; - - /** - * Task that periodically sends a HELLO beacon via the helper. - */ - GNUNET_SCHEDULER_TaskIdentifier beacon_task; - - /** - * Tracker for bandwidth limit - */ - struct GNUNET_BANDWIDTH_Tracker tracker; - - /** - * The mac_address of the wlan card given to us by the helper. - */ - struct GNUNET_TRANSPORT_WLAN_MacAddress mac_address; - - /** - * Have we received a control message with our MAC address yet? - */ - int have_mac; - - /** - * Options for addresses - */ - uint32_t options; - -}; - - -/** - * Information associated with a message. Can contain - * the session or the MAC endpoint associated with the - * message (or both). - */ -struct MacAndSession -{ - /** - * NULL if the identity of the other peer is not known. - */ - struct Session *session; - - /** - * MAC address of the other peer, NULL if not known. - */ - struct MacEndpoint *endpoint; -}; - -/** - * Function called for a quick conversion of the binary address to - * a numeric address. Note that the caller must not free the - * address and that the next call to this function is allowed - * to override the address again. - * - * @param cls closure - * @param addr binary address - * @param addrlen length of the @a addr - * @return string representing the same address - */ -static const char * -bluetooth_plugin_address_to_string (void *cls, - const void *addr, - size_t addrlen); - -/** - * Print MAC addresses nicely. - * - * @param mac the mac address - * @return string to a static buffer with - * the human-readable mac, will be overwritten during the next call to - * this function - */ -static const char * -mac_to_string (const struct GNUNET_TRANSPORT_WLAN_MacAddress * mac) -{ - static char macstr[20]; - - GNUNET_snprintf (macstr, - sizeof (macstr), - "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X", - mac->mac[0], mac->mac[1], - mac->mac[2], mac->mac[3], - mac->mac[4], mac->mac[5]); - return macstr; -} - - -/** - * Fill the radiotap header - * - * @param endpoint pointer to the endpoint, can be NULL - * @param header pointer to the radiotap header - * @param size total message size - */ -static void -get_radiotap_header (struct MacEndpoint *endpoint, - struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header, - uint16_t size) -{ - header->header.type = ntohs (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER); - header->header.size = ntohs (size); - if (NULL != endpoint) - { - header->rate = endpoint->rate; - header->tx_power = endpoint->tx_power; - header->antenna = endpoint->antenna; - } - else - { - header->rate = 255; - header->tx_power = 0; - header->antenna = 0; - } -} - - -/** - * Generate the WLAN hardware header for one packet - * - * @param plugin the plugin handle - * @param header address to write the header to - * @param to_mac_addr address of the recipient - * @param size size of the whole packet, needed to calculate the time to send the packet - */ -static void -get_wlan_header (struct Plugin *plugin, - struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *header, - const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr, - unsigned int size) -{ - const int rate = 11000000; - - header->frame_control = htons (IEEE80211_FC0_TYPE_DATA); - header->addr1 = *to_mac_addr; - header->addr2 = plugin->mac_address; - header->addr3 = mac_bssid_gnunet; - header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290); - header->sequence_control = 0; // FIXME? - header->llc[0] = WLAN_LLC_DSAP_FIELD; - header->llc[1] = WLAN_LLC_SSAP_FIELD; - header->llc[2] = 0; // FIXME? - header->llc[3] = 0; // FIXME? -} - - -/** - * Send an ACK for a fragment we received. - * - * @param cls the 'struct MacEndpoint' the ACK must be sent to - * @param msg_id id of the message - * @param hdr pointer to the hdr where the ack is stored - */ -static void -send_ack (void *cls, uint32_t msg_id, - const struct GNUNET_MessageHeader *hdr) -{ - struct MacEndpoint *endpoint = cls; - struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage* radio_header; - uint16_t msize = ntohs (hdr->size); - size_t size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize; - char buf[size]; - - if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE) - { - GNUNET_break (0); - return; - } - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Sending ACK to helper\n"); - radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf; - get_radiotap_header (endpoint, radio_header, size); - get_wlan_header (endpoint->plugin, - &radio_header->frame, - &endpoint->addr.mac, - sizeof (endpoint->addr.mac)); - memcpy (&radio_header[1], hdr, msize); - if (NULL != - GNUNET_HELPER_send (endpoint->plugin->suid_helper, - &radio_header->header, - GNUNET_NO /* dropping ACKs is bad */, - NULL, NULL)) - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, - _("# Bluetooth ACKs sent"), - 1, GNUNET_NO); -} - - -/** - * Handles the data after all fragments are put together - * - * @param cls macendpoint this messages belongs to - * @param hdr pointer to the data - */ -static void -bluetooth_data_message_handler (void *cls, - const struct GNUNET_MessageHeader *hdr) -{ - struct MacEndpoint *endpoint = cls; - struct Plugin *plugin = endpoint->plugin; - struct MacAndSession mas; - - GNUNET_STATISTICS_update (plugin->env->stats, - _("# Bluetooth messages defragmented"), 1, - GNUNET_NO); - mas.session = NULL; - mas.endpoint = endpoint; - (void) GNUNET_SERVER_mst_receive (plugin->fragment_data_tokenizer, - &mas, - (const char *) hdr, - ntohs (hdr->size), - GNUNET_YES, GNUNET_NO); -} - - -/** - * Free a session - * - * @param session the session free - */ -static void -free_session (struct Session *session) -{ - struct MacEndpoint *endpoint = session->mac; - struct PendingMessage *pm; - - endpoint->plugin->env->session_end (endpoint->plugin->env->cls, - session->address, - session); - while (NULL != (pm = session->pending_message_head)) - { - GNUNET_CONTAINER_DLL_remove (session->pending_message_head, - session->pending_message_tail, pm); - if (GNUNET_SCHEDULER_NO_TASK != pm->timeout_task) - { - GNUNET_SCHEDULER_cancel (pm->timeout_task); - pm->timeout_task = GNUNET_SCHEDULER_NO_TASK; - } - GNUNET_free (pm->msg); - GNUNET_free (pm); - } - GNUNET_CONTAINER_DLL_remove (endpoint->sessions_head, - endpoint->sessions_tail, - session); - if (session->timeout_task != GNUNET_SCHEDULER_NO_TASK) - { - GNUNET_SCHEDULER_cancel (session->timeout_task); - session->timeout_task = GNUNET_SCHEDULER_NO_TASK; - } - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), -1, - GNUNET_NO); - GNUNET_HELLO_address_free (session->address); - GNUNET_free (session); -} - - -/** - * A session is timing out. Clean up. - * - * @param cls pointer to the Session - * @param tc unused - */ -static void -session_timeout (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) -{ - struct Session * session = cls; - struct GNUNET_TIME_Relative timeout; - - session->timeout_task = GNUNET_SCHEDULER_NO_TASK; - timeout = GNUNET_TIME_absolute_get_remaining (session->timeout); - if (0 == timeout.rel_value_us) - { - free_session (session); - return; - } - session->timeout_task = - GNUNET_SCHEDULER_add_delayed (timeout, &session_timeout, session); -} - - -/** - * Create a new session - * - * @param endpoint pointer to the mac endpoint of the peer - * @param peer peer identity to use for this session - * @return returns the session - */ -static struct Session * -create_session (struct MacEndpoint *endpoint, - const struct GNUNET_PeerIdentity *peer) -{ - struct Session *session; - - for (session = endpoint->sessions_head; NULL != session; session = session->next) - if (0 == memcmp (peer, &session->target, - sizeof (struct GNUNET_PeerIdentity))) - { - session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT); - return session; - } - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# Bluetooth sessions allocated"), 1, - GNUNET_NO); - session = GNUNET_new (struct Session); - GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head, - endpoint->sessions_tail, - session); - session->address = GNUNET_HELLO_address_allocate (peer, PLUGIN_NAME, - &endpoint->addr, sizeof (endpoint->addr), GNUNET_HELLO_ADDRESS_INFO_NONE); - session->mac = endpoint; - session->target = *peer; - session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT); - session->timeout_task = - GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, &session_timeout, session); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Created new session for peer `%s' with endpoint %s\n", - GNUNET_i2s (peer), - mac_to_string (&endpoint->addr.mac)); - return session; -} - - -/** - * Lookup a new session - * - * @param endpoint pointer to the mac endpoint of the peer - * @param peer peer identity to use for this session - * @return returns the session or NULL - */ -static struct Session * -lookup_session (struct MacEndpoint *endpoint, - const struct GNUNET_PeerIdentity *peer) -{ - struct Session *session; - - for (session = endpoint->sessions_head; NULL != session; session = session->next) - if (0 == memcmp (peer, &session->target, sizeof (struct GNUNET_PeerIdentity))) - { - session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT); - return session; - } - return NULL; -} - - -/** - * Function called once we have successfully given the fragment - * message to the SUID helper process and we are thus ready for - * the next fragment. - * - * @param cls the 'struct FragmentMessage' - * @param result result of the operation (GNUNET_OK on success, GNUNET_NO if the helper died, GNUNET_SYSERR - * if the helper was stopped) - */ -static void -fragment_transmission_done (void *cls, - int result) -{ - struct FragmentMessage *fm = cls; - - fm->sh = NULL; - GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext); -} - - -/** - * Transmit a fragment of a message. - * - * @param cls `struct FragmentMessage *` this fragment message belongs to - * @param hdr pointer to the start of the fragment message - */ -static void -transmit_fragment (void *cls, - const struct GNUNET_MessageHeader *hdr) -{ - struct FragmentMessage *fm = cls; - struct MacEndpoint *endpoint = fm->macendpoint; - size_t size; - uint16_t msize; - - msize = ntohs (hdr->size); - size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + msize; - { - char buf[size]; - struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radio_header; - - radio_header = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) buf; - get_radiotap_header (endpoint, radio_header, size); - get_wlan_header (endpoint->plugin, - &radio_header->frame, - &endpoint->addr.mac, - sizeof (endpoint->addr.mac)); - memcpy (&radio_header[1], hdr, msize); - GNUNET_assert (NULL == fm->sh); - fm->sh = GNUNET_HELPER_send (endpoint->plugin->suid_helper, - &radio_header->header, - GNUNET_NO, - &fragment_transmission_done, fm); - fm->size_on_wire += size; - if (NULL != fm->sh) - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, - _("# Bluetooth message fragments sent"), - 1, GNUNET_NO); - else - GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext); - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, - "# bytes currently in Bluetooth buffers", - -msize, GNUNET_NO); - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, - "# bytes transmitted via Bluetooth", - msize, GNUNET_NO); - } -} - - -/** - * Frees the space of a message in the fragment queue (send queue) - * - * @param fm message to free - */ -static void -free_fragment_message (struct FragmentMessage *fm) -{ - struct MacEndpoint *endpoint = fm->macendpoint; - - GNUNET_STATISTICS_update (endpoint->plugin->env->stats, - _("# Bluetooth messages pending (with fragmentation)"), - -1, GNUNET_NO); - GNUNET_CONTAINER_DLL_remove (endpoint->sending_messages_head, - endpoint->sending_messages_tail, fm); - if (NULL != fm->sh) - { - GNUNET_HELPER_send_cancel (fm->sh); - fm->sh = NULL; - } - GNUNET_FRAGMENT_context_destroy (fm->fragcontext, - &endpoint->msg_delay, - &endpoint->ack_delay); - if (fm->timeout_task != GNUNET_SCHEDULER_NO_TASK) - { - GNUNET_SCHEDULER_cancel (fm->timeout_task); - fm->timeout_task = GNUNET_SCHEDULER_NO_TASK; - } - GNUNET_free (fm); -} - - -/** - * A FragmentMessage has timed out. Remove it. - * - * @param cls pointer to the 'struct FragmentMessage' - * @param tc pointer to the GNUNET_SCHEDULER_TaskContext - */ -static void -fragmentmessage_timeout (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) -{ - struct FragmentMessage *fm = cls; - - fm->timeout_task = GNUNET_SCHEDULER_NO_TASK; - if (NULL != fm->cont) - { - fm->cont (fm->cont_cls, - &fm->target, - GNUNET_SYSERR, - fm->size_payload, - fm->size_on_wire); - fm->cont = NULL; - } - free_fragment_message (fm); -} - - -/** - * Transmit a message to the given destination with fragmentation. - * - * @param endpoint desired destination - * @param timeout how long can the message wait? - * @param target peer that should receive the message - * @param msg message to transmit - * @param payload_size bytes of payload - * @param cont continuation to call once the message has - * been transmitted (or if the transport is ready - * for the next transmission call; or if the - * peer disconnected...); can be NULL - * @param cont_cls closure for @a cont - */ -static void -send_with_fragmentation (struct MacEndpoint *endpoint, - struct GNUNET_TIME_Relative timeout, - const struct GNUNET_PeerIdentity *target, - const struct GNUNET_MessageHeader *msg, - size_t payload_size, - GNUNET_TRANSPORT_TransmitContinuation cont, - void *cont_cls) - -{ - struct FragmentMessage *fm; - struct Plugin *plugin; - - plugin = endpoint->plugin; - fm = GNUNET_new (struct FragmentMessage); - fm->macendpoint = endpoint; - fm->target = *target; - fm->size_payload = payload_size; - fm->size_on_wire = 0; - fm->timeout = GNUNET_TIME_relative_to_absolute (timeout); - fm->cont = cont; - fm->cont_cls = cont_cls; - /* 1 MBit/s typical data rate, 1430 byte fragments => ~100 ms per message */ - fm->fragcontext = - GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU, - &plugin->tracker, - endpoint->msg_delay, - endpoint->ack_delay, - msg, - &transmit_fragment, fm); - fm->timeout_task = - GNUNET_SCHEDULER_add_delayed (timeout, - &fragmentmessage_timeout, fm); - GNUNET_CONTAINER_DLL_insert_tail (endpoint->sending_messages_head, - endpoint->sending_messages_tail, - fm); -} - - -/** - * Free a MAC endpoint. - * - * @param endpoint pointer to the MacEndpoint to free - */ -static void -free_macendpoint (struct MacEndpoint *endpoint) -{ - struct Plugin *plugin = endpoint->plugin; - struct FragmentMessage *fm; - struct Session *session; - - GNUNET_STATISTICS_update (plugin->env->stats, - _("# Bluetooth MAC endpoints allocated"), -1, GNUNET_NO); - while (NULL != (session = endpoint->sessions_head)) - free_session (session); - while (NULL != (fm = endpoint->sending_messages_head)) - free_fragment_message (fm); - GNUNET_CONTAINER_DLL_remove (plugin->mac_head, - plugin->mac_tail, - endpoint); - - if (NULL != endpoint->defrag) - { - GNUNET_DEFRAGMENT_context_destroy(endpoint->defrag); - endpoint->defrag = NULL; - } - - plugin->mac_count--; - if (GNUNET_SCHEDULER_NO_TASK != endpoint->timeout_task) - { - GNUNET_SCHEDULER_cancel (endpoint->timeout_task); - endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK; - } - GNUNET_free (endpoint); -} - - -/** - * A MAC endpoint is timing out. Clean up. - * - * @param cls pointer to the MacEndpoint - * @param tc pointer to the GNUNET_SCHEDULER_TaskContext - */ -static void -macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) -{ - struct MacEndpoint *endpoint = cls; - struct GNUNET_TIME_Relative timeout; - - endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK; - timeout = GNUNET_TIME_absolute_get_remaining (endpoint->timeout); - if (0 == timeout.rel_value_us) - { - free_macendpoint (endpoint); - return; - } - endpoint->timeout_task = - GNUNET_SCHEDULER_add_delayed (timeout, &macendpoint_timeout, - endpoint); -} - - -/** - * Find (or create) a MacEndpoint with a specific MAC address - * - * @param plugin pointer to the plugin struct - * @param addr the MAC address of the endpoint - * @return handle to our data structure for this MAC - */ -static struct MacEndpoint * -create_macendpoint (struct Plugin *plugin, - struct WlanAddress *addr) -{ - struct MacEndpoint *pos; - - for (pos = plugin->mac_head; NULL != pos; pos = pos->next) - if (0 == memcmp (addr, &pos->addr, sizeof (struct WlanAddress))) - return pos; - pos = GNUNET_new (struct MacEndpoint); - pos->addr = (*addr); - pos->plugin = plugin; - pos->defrag = - GNUNET_DEFRAGMENT_context_create (plugin->env->stats, WLAN_MTU, - MESSAGES_IN_DEFRAG_QUEUE_PER_MAC, - pos, - &bluetooth_data_message_handler, - &send_ack); - - pos->msg_delay = GNUNET_TIME_UNIT_MILLISECONDS; - pos->ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, - 100); - pos->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT); - pos->timeout_task = - GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout, - pos); - GNUNET_CONTAINER_DLL_insert (plugin->mac_head, plugin->mac_tail, pos); - plugin->mac_count++; - GNUNET_STATISTICS_update (plugin->env->stats, - _("# Bluetooth MAC endpoints allocated"), - 1, GNUNET_NO); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "New MAC endpoint `%s'\n", - bluetooth_plugin_address_to_string(NULL, - addr, - sizeof (struct WlanAddress))); - return pos; -} - - -/** - * Function obtain the network type for a session - * - * @param cls closure ('struct Plugin*') - * @param session the session - * @return the network type in HBO or GNUNET_SYSERR - */ -static enum GNUNET_ATS_Network_Type -bluetooth_get_network (void *cls, - struct Session *session) -{ - GNUNET_assert (NULL != session); - return GNUNET_ATS_NET_BT; -} - - -/** - * Look up a session for a peer and create a new session if none is found - * - * @param endpoint pointer to the mac endpoint of the peer - * @param peer peer identity to use for this session - * @return returns the session - */ -static struct Session * -get_session (struct MacEndpoint *endpoint, - const struct GNUNET_PeerIdentity *peer) -{ - struct Session *session; - if (NULL != (session = lookup_session (endpoint, peer))) - return session; - return create_session (endpoint, peer); -} - - -/** - * Creates a new outbound session the transport service will use to send data to the - * peer - * - * @param cls the plugin - * @param address the address - * @return the session or NULL of max connections exceeded - */ -static struct Session * -bluetooth_plugin_get_session (void *cls, - const struct GNUNET_HELLO_Address *address) -{ - struct Plugin *plugin = cls; - struct MacEndpoint *endpoint; - - if (NULL == address) - return NULL; - if (sizeof (struct WlanAddress) != address->address_length) - { - GNUNET_break (0); - return NULL; - } - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Service asked to create session for peer `%s' with MAC `%s'\n", - GNUNET_i2s (&address->peer), - bluetooth_plugin_address_to_string(NULL, - address->address, - address->address_length)); - endpoint = create_macendpoint (plugin, - (struct WlanAddress *) address->address); - return get_session (endpoint, &address->peer); -} - - -/** - * Function that can be used to force the plugin to disconnect - * from the given peer and cancel all previous transmissions - * (and their continuation). - * - * @param cls closure - * @param target peer from which to disconnect - */ -static void -bluetooth_plugin_disconnect_peer (void *cls, const struct GNUNET_PeerIdentity *target) -{ - struct Plugin *plugin = cls; - struct Session *session; - struct MacEndpoint *endpoint; - - for (endpoint = plugin->mac_head; NULL != endpoint; endpoint = endpoint->next) - for (session = endpoint->sessions_head; NULL != session; session = session->next) - if (0 == memcmp (target, &session->target, - sizeof (struct GNUNET_PeerIdentity))) - { - free_session (session); - break; /* inner-loop only (in case peer has another MAC as well!) */ - } -} - - -/** - * Function that can be used to force the plugin to disconnect - * from the given peer and cancel all previous transmissions - * (and their continuation). - * - * @param cls closure - * @param session session to disconnect - */ -static int -bluetooth_plugin_disconnect_session (void *cls, - struct Session *session) -{ - free_session (session); - return GNUNET_OK; -} - - -/** - * Function that is called to get the keepalive factor. - * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to - * calculate the interval between keepalive packets. - * - * @param cls closure with the `struct Plugin` - * @return keepalive factor - */ -static unsigned int -bluetooth_query_keepalive_factor (void *cls) -{ - return 3; -} - - -/** - * Function that can be used by the transport service to transmit - * a message using the plugin. Note that in the case of a - * peer disconnecting, the continuation MUST be called - * prior to the disconnect notification itself. This function - * will be called with this peer's HELLO message to initiate - * a fresh connection to another peer. - * - * @param cls closure - * @param session which session must be used - * @param msgbuf the message to transmit - * @param msgbuf_size number of bytes in 'msgbuf' - * @param priority how important is the message (most plugins will - * ignore message priority and just FIFO) - * @param to how long to wait at most for the transmission (does not - * require plugins to discard the message after the timeout, - * just advisory for the desired delay; most plugins will ignore - * this as well) - * @param cont continuation to call once the message has - * been transmitted (or if the transport is ready - * for the next transmission call; or if the - * peer disconnected...); can be NULL - * @param cont_cls closure for cont - * @return number of bytes used (on the physical network, with overheads); - * -1 on hard errors (i.e. address invalid); 0 is a legal value - * and does NOT mean that the message was not transmitted (DV) - */ -static ssize_t -bluetooth_plugin_send (void *cls, - struct Session *session, - const char *msgbuf, - size_t msgbuf_size, - unsigned int priority, - struct GNUNET_TIME_Relative to, - GNUNET_TRANSPORT_TransmitContinuation cont, - void *cont_cls) -{ - struct Plugin *plugin = cls; - struct WlanHeader *wlanheader; - size_t size = msgbuf_size + sizeof (struct WlanHeader); - char buf[size] GNUNET_ALIGN; - - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Transmitting %u bytes of payload to peer `%s' (starting with %u byte message of type %u)\n", - msgbuf_size, - GNUNET_i2s (&session->target), - (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->size), - (unsigned int) ntohs (((struct GNUNET_MessageHeader*)msgbuf)->type)); - wlanheader = (struct WlanHeader *) buf; - wlanheader->header.size = htons (msgbuf_size + sizeof (struct WlanHeader)); - wlanheader->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA); - wlanheader->sender = *plugin->env->my_identity; - wlanheader->target = session->target; - wlanheader->crc = htonl (GNUNET_CRYPTO_crc32_n (msgbuf, msgbuf_size)); - memcpy (&wlanheader[1], msgbuf, msgbuf_size); - - GNUNET_STATISTICS_update (plugin->env->stats, - "# bytes currently in Bluetooth buffers", - msgbuf_size, GNUNET_NO); - - send_with_fragmentation (session->mac, - to, - &session->target, - &wlanheader->header, - msgbuf_size, - cont, cont_cls); - return size; -} - - -/** - * We have received data from the WLAN via some session. Process depending - * on the message type (HELLO, DATA, FRAGMENTATION or FRAGMENTATION-ACK). - * - * @param cls pointer to the plugin - * @param client pointer to the session this message belongs to - * @param hdr start of the message - */ -static int -process_data (void *cls, void *client, const struct GNUNET_MessageHeader *hdr) -{ - struct Plugin *plugin = cls; - struct GNUNET_HELLO_Address *address; - struct MacAndSession *mas = client; - struct MacAndSession xmas; - struct GNUNET_ATS_Information ats; - struct FragmentMessage *fm; - struct GNUNET_PeerIdentity tmpsource; - const struct WlanHeader *wlanheader; - int ret; - uint16_t msize; - - ats.type = htonl (GNUNET_ATS_NETWORK_TYPE); - ats.value = htonl (GNUNET_ATS_NET_BT); - msize = ntohs (hdr->size); - - GNUNET_STATISTICS_update (plugin->env->stats, - "# bytes received via Bluetooth", - msize, GNUNET_NO); - - switch (ntohs (hdr->type)) - { - case GNUNET_MESSAGE_TYPE_HELLO: - if (GNUNET_OK != - GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hdr, &tmpsource)) - { - GNUNET_break_op (0); - break; - } - if (NULL == mas->endpoint) - { - GNUNET_break (0); - break; - } - - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Processing %u bytes of HELLO from peer `%s' at MAC %s\n", - (unsigned int) msize, - GNUNET_i2s (&tmpsource), - bluetooth_plugin_address_to_string (NULL, - &mas->endpoint->addr, - sizeof (mas->endpoint->addr))); - - GNUNET_STATISTICS_update (plugin->env->stats, - _("# HELLO messages received via Bluetooth"), 1, - GNUNET_NO); - - address = GNUNET_HELLO_address_allocate (&tmpsource, PLUGIN_NAME, - &mas->endpoint->addr, sizeof (mas->endpoint->addr), - GNUNET_HELLO_ADDRESS_INFO_INBOUND); - plugin->env->receive (plugin->env->cls, - address, mas->session, hdr); - plugin->env->update_address_metrics (plugin->env->cls, - address, mas->session, &ats, 1); - GNUNET_HELLO_address_free (address); - break; - case GNUNET_MESSAGE_TYPE_FRAGMENT: - if (NULL == mas->endpoint) - { - GNUNET_break (0); - break; - } - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Processing %u bytes of FRAGMENT from MAC %s\n", - (unsigned int) msize, - bluetooth_plugin_address_to_string (NULL, - &mas->endpoint->addr, - sizeof (mas->endpoint->addr))); - GNUNET_STATISTICS_update (plugin->env->stats, - _("# fragments received via Bluetooth"), - 1, - GNUNET_NO); - (void) GNUNET_DEFRAGMENT_process_fragment (mas->endpoint->defrag, - hdr); - break; - case GNUNET_MESSAGE_TYPE_FRAGMENT_ACK: - if (NULL == mas->endpoint) - { - GNUNET_break (0); - break; - } - GNUNET_STATISTICS_update (plugin->env->stats, _("# ACKs received via Bluetooth"), - 1, GNUNET_NO); - for (fm = mas->endpoint->sending_messages_head; NULL != fm; fm = fm->next) - { - ret = GNUNET_FRAGMENT_process_ack (fm->fragcontext, hdr); - if (GNUNET_OK == ret) - { - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Got last ACK, finished message transmission to `%s' (%p)\n", - bluetooth_plugin_address_to_string (NULL, - &mas->endpoint->addr, - sizeof (mas->endpoint->addr)), - fm); - mas->endpoint->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT); - if (NULL != fm->cont) - { - fm->cont (fm->cont_cls, &fm->target, GNUNET_OK, fm->size_payload, fm->size_on_wire); - fm->cont = NULL; - } - free_fragment_message (fm); - break; - } - if (GNUNET_NO == ret) - { - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Got an ACK, message transmission to `%s' not yet finished\n", - bluetooth_plugin_address_to_string (NULL, - &mas->endpoint->addr, - sizeof (mas->endpoint->addr))); - break; - } - } - LOG (GNUNET_ERROR_TYPE_DEBUG, - "ACK not matched against any active fragmentation with MAC `%s'\n", - bluetooth_plugin_address_to_string (NULL, - &mas->endpoint->addr, - sizeof (mas->endpoint->addr))); - break; - case GNUNET_MESSAGE_TYPE_WLAN_DATA: - if (NULL == mas->endpoint) - { - GNUNET_break (0); - break; - } - if (msize < sizeof (struct WlanHeader)) - { - GNUNET_break (0); - break; - } - wlanheader = (const struct WlanHeader *) hdr; - if (0 != memcmp (&wlanheader->target, - plugin->env->my_identity, - sizeof (struct GNUNET_PeerIdentity))) - { - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Bluetooth data for `%s', not for me, ignoring\n", - GNUNET_i2s (&wlanheader->target)); - break; - } - if (ntohl (wlanheader->crc) != - GNUNET_CRYPTO_crc32_n (&wlanheader[1], msize - sizeof (struct WlanHeader))) - { - GNUNET_STATISTICS_update (plugin->env->stats, - _("# Bluetooth DATA messages discarded due to CRC32 error"), 1, - GNUNET_NO); - break; - } - xmas.endpoint = mas->endpoint; - xmas.session = create_session (mas->endpoint, &wlanheader->sender); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Processing %u bytes of BLUETOOTH DATA from peer `%s'\n", - (unsigned int) msize, - GNUNET_i2s (&wlanheader->sender)); - (void) GNUNET_SERVER_mst_receive (plugin->wlan_header_payload_tokenizer, - &xmas, - (const char *) &wlanheader[1], - msize - sizeof (struct WlanHeader), - GNUNET_YES, GNUNET_NO); - break; - default: - if (NULL == mas->endpoint) - { - GNUNET_break (0); - break; - } - if (NULL == mas->session) - { - GNUNET_break (0); - break; - } - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Received packet with %u bytes of type %u from peer %s\n", - (unsigned int) msize, - (unsigned int) ntohs (hdr->type), - GNUNET_i2s (&mas->session->target)); - plugin->env->receive (plugin->env->cls, - mas->session->address, - mas->session, - hdr); - plugin->env->update_address_metrics (plugin->env->cls, - mas->session->address, - mas->session, - &ats, 1); - break; - } - return GNUNET_OK; -} - - -/** - * Function used for to process the data from the suid process - * - * @param cls the plugin handle - * @param client client that send the data (not used) - * @param hdr header of the GNUNET_MessageHeader - */ -static int -handle_helper_message (void *cls, void *client, - const struct GNUNET_MessageHeader *hdr) -{ - struct Plugin *plugin = cls; - struct GNUNET_HELLO_Address *address; - const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *rxinfo; - const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *cm; - struct WlanAddress wa; - struct MacAndSession mas; - uint16_t msize; - - msize = ntohs (hdr->size); - switch (ntohs (hdr->type)) - { - case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL: - if (msize != sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage)) - { - GNUNET_break (0); - break; - } - cm = (const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *) hdr; - if (GNUNET_YES == plugin->have_mac) - { - if (0 == memcmp (&plugin->mac_address, - &cm->mac, - sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) - break; /* no change */ - /* remove old address */ - memset (&wa, 0, sizeof (struct WlanAddress)); - wa.mac = plugin->mac_address; - wa.options = htonl(plugin->options); - address = GNUNET_HELLO_address_allocate (plugin->env->my_identity, - PLUGIN_NAME, &wa, sizeof (wa), GNUNET_HELLO_ADDRESS_INFO_NONE); - plugin->env->notify_address (plugin->env->cls, GNUNET_NO, address); - GNUNET_HELLO_address_free (address); - } - plugin->mac_address = cm->mac; - plugin->have_mac = GNUNET_YES; - memset (&wa, 0, sizeof (struct WlanAddress)); - wa.mac = plugin->mac_address; - wa.options = htonl(plugin->options); - address = GNUNET_HELLO_address_allocate (plugin->env->my_identity, - PLUGIN_NAME, &wa, sizeof (wa), GNUNET_HELLO_ADDRESS_INFO_NONE); - - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Received BT_HELPER_CONTROL message with MAC address `%s' for peer `%s'\n", - mac_to_string (&cm->mac), - GNUNET_i2s (plugin->env->my_identity)); - plugin->env->notify_address (plugin->env->cls, GNUNET_YES, address); - GNUNET_HELLO_address_free (address); - - break; - case GNUNET_MESSAGE_TYPE_WLAN_DATA_FROM_HELPER: - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Got data message from helper with %u bytes\n", - msize); - GNUNET_STATISTICS_update (plugin->env->stats, - _("# DATA messages received via Bluetooth"), 1, - GNUNET_NO); - if (msize < sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage)) - { - GNUNET_break (0); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Size of packet is too small (%u bytes)\n", - msize); - break; - } - rxinfo = (const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *) hdr; - - /* check if message is actually for us */ - if (0 != memcmp (&rxinfo->frame.addr3, &mac_bssid_gnunet, - sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) - { - /* Not the GNUnet BSSID */ - break; - } - if ( (0 != memcmp (&rxinfo->frame.addr1, &bc_all_mac, - sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) && - (0 != memcmp (&rxinfo->frame.addr1, &plugin->mac_address, - sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) ) - { - /* Neither broadcast nor specifically for us */ - break; - } - if (0 == memcmp (&rxinfo->frame.addr2, &plugin->mac_address, - sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))) - { - /* packet is FROM us, thus not FOR us */ - break; - } - - GNUNET_STATISTICS_update (plugin->env->stats, - _("# Bluetooth DATA messages processed"), - 1, GNUNET_NO); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Receiving %u bytes of data from MAC `%s'\n", - (unsigned int) (msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage)), - mac_to_string (&rxinfo->frame.addr2)); - wa.mac = rxinfo->frame.addr2; - wa.options = htonl (0); - mas.endpoint = create_macendpoint (plugin, &wa); - mas.session = NULL; - (void) GNUNET_SERVER_mst_receive (plugin->helper_payload_tokenizer, - &mas, - (const char*) &rxinfo[1], - msize - sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage), - GNUNET_YES, GNUNET_NO); - break; - default: - GNUNET_break (0); - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Unexpected message of type %u (%u bytes)", - ntohs (hdr->type), ntohs (hdr->size)); - break; - } - return GNUNET_OK; -} - - - -/** - * Task to (periodically) send a HELLO beacon - * - * @param cls pointer to the plugin struct - * @param tc scheduler context - */ -static void -send_hello_beacon (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) -{ - struct Plugin *plugin = cls; - uint16_t size; - uint16_t hello_size; - struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radioHeader; - const struct GNUNET_MessageHeader *hello; - - hello = plugin->env->get_our_hello (); - hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello); - GNUNET_assert (sizeof (struct WlanHeader) + hello_size <= WLAN_MTU); - size = sizeof (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) + hello_size; - { - char buf[size] GNUNET_ALIGN; - - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Sending %u byte HELLO beacon\n", - (unsigned int) size); - radioHeader = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage*) buf; - get_radiotap_header (NULL, radioHeader, size); - get_wlan_header (plugin, &radioHeader->frame, &bc_all_mac, size); - memcpy (&radioHeader[1], hello, hello_size); - if (NULL != - GNUNET_HELPER_send (plugin->suid_helper, - &radioHeader->header, - GNUNET_YES /* can drop */, - NULL, NULL)) - GNUNET_STATISTICS_update (plugin->env->stats, - _("# HELLO beacons sent via Bluetooth"), - 1, GNUNET_NO); - } - plugin->beacon_task = - GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply - (HELLO_BEACON_SCALING_FACTOR, - plugin->mac_count + 1), - &send_hello_beacon, - plugin); - -} - - -/** - * Another peer has suggested an address for this - * peer and transport plugin. Check that this could be a valid - * address. If so, consider adding it to the list - * of addresses. - * - * @param cls closure - * @param addr pointer to the address - * @param addrlen length of @a addr - * @return #GNUNET_OK if this is a plausible address for this peer - * and transport - */ -static int -bluetooth_plugin_address_suggested (void *cls, - const void *addr, - size_t addrlen) -{ - struct Plugin *plugin = cls; - struct WlanAddress *wa = (struct WlanAddress *) addr; - - if (addrlen != sizeof (struct WlanAddress)) - { - GNUNET_break_op (0); - return GNUNET_SYSERR; - } - if (GNUNET_YES != plugin->have_mac) - { - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Rejecting MAC `%s': I don't know my MAC!\n", - mac_to_string (addr)); - return GNUNET_NO; /* don't know my MAC */ - } - if (0 != memcmp (&wa->mac, - &plugin->mac_address, - sizeof (wa->mac))) - { - LOG (GNUNET_ERROR_TYPE_DEBUG, - "Rejecting MAC `%s': not my MAC!\n", - mac_to_string (addr)); - return GNUNET_NO; /* not my MAC */ - } - return GNUNET_OK; -} - - -/** - * Function called for a quick conversion of the binary address to - * a numeric address. Note that the caller must not free the - * address and that the next call to this function is allowed - * to override the address again. - * - * @param cls closure - * @param addr binary address - * @param addrlen length of the @a addr - * @return string representing the same address - */ -static const char * -bluetooth_plugin_address_to_string (void *cls, - const void *addr, - size_t addrlen) -{ - const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac; - static char macstr[36]; - - if (sizeof (struct WlanAddress) != addrlen) - { - GNUNET_break (0); - return NULL; - } - mac = &((struct WlanAddress *) addr)->mac; - GNUNET_snprintf (macstr, - sizeof (macstr), - "%s.%u.%s", - PLUGIN_NAME, - ntohl (((struct WlanAddress *) addr)->options), - mac_to_string (mac)); - return macstr; -} - - -/** - * Convert the transports address to a nice, human-readable format. - * - * @param cls closure - * @param type name of the transport that generated the address - * @param addr one of the addresses of the host, NULL for the last address - * the specific address format depends on the transport - * @param addrlen length of the @a addr - * @param numeric should (IP) addresses be displayed in numeric form? - * @param timeout after how long should we give up? - * @param asc function to call on each string - * @param asc_cls closure for @a asc - */ -static void -bluetooth_plugin_address_pretty_printer (void *cls, - const char *type, - const void *addr, - size_t addrlen, - int numeric, - struct GNUNET_TIME_Relative timeout, - GNUNET_TRANSPORT_AddressStringCallback asc, - void *asc_cls) -{ - const char *ret; - - if (sizeof (struct WlanAddress) == addrlen) - ret = bluetooth_plugin_address_to_string(NULL, addr, addrlen); - else - ret = NULL; - asc (asc_cls, - ret, - (NULL == ret) ? GNUNET_SYSERR : GNUNET_OK); - asc (asc_cls, NULL, GNUNET_OK); -} - - -/** - * Exit point from the plugin. - * - * @param cls pointer to the api struct - */ -void * -libgnunet_plugin_transport_bluetooth_done (void *cls) -{ - struct WlanAddress wa; - struct GNUNET_HELLO_Address *address; - struct GNUNET_TRANSPORT_PluginFunctions *api = cls; - struct Plugin *plugin = api->cls; - struct MacEndpoint *endpoint; - struct MacEndpoint *endpoint_next; - - if (NULL == plugin) - { - GNUNET_free (api); - return NULL; - } - - if (GNUNET_YES == plugin->have_mac) - { - memset (&wa, 0, sizeof(wa)); - wa.options = htonl (plugin->options); - wa.mac = plugin->mac_address; - address = GNUNET_HELLO_address_allocate (plugin->env->my_identity, - PLUGIN_NAME, &wa, sizeof (struct WlanAddress), - GNUNET_HELLO_ADDRESS_INFO_NONE); - - plugin->env->notify_address (plugin->env->cls, GNUNET_NO, address); - plugin->have_mac = GNUNET_NO; - - GNUNET_HELLO_address_free (address); - } - - if (GNUNET_SCHEDULER_NO_TASK != plugin->beacon_task) - { - GNUNET_SCHEDULER_cancel (plugin->beacon_task); - plugin->beacon_task = GNUNET_SCHEDULER_NO_TASK; - } - if (NULL != plugin->suid_helper) - { - GNUNET_HELPER_stop (plugin->suid_helper, GNUNET_NO); - plugin->suid_helper = NULL; - } - endpoint_next = plugin->mac_head; - while (NULL != (endpoint = endpoint_next)) - { - endpoint_next = endpoint->next; - free_macendpoint (endpoint); - } - if (NULL != plugin->fragment_data_tokenizer) - { - GNUNET_SERVER_mst_destroy (plugin->fragment_data_tokenizer); - plugin->fragment_data_tokenizer = NULL; - } - if (NULL != plugin->wlan_header_payload_tokenizer) - { - GNUNET_SERVER_mst_destroy (plugin->wlan_header_payload_tokenizer); - plugin->wlan_header_payload_tokenizer = NULL; - } - if (NULL != plugin->helper_payload_tokenizer) - { - GNUNET_SERVER_mst_destroy (plugin->helper_payload_tokenizer); - plugin->helper_payload_tokenizer = NULL; - } - GNUNET_free_non_null (plugin->interface); - GNUNET_free (plugin); - GNUNET_free (api); - return NULL; -} - - -/** - * Function called to convert a string address to - * a binary address. - * - * @param cls closure (`struct Plugin *`) - * @param addr string address - * @param addrlen length of the @a addr - * @param buf location to store the buffer - * @param added location to store the number of bytes in the buffer. - * If the function returns #GNUNET_SYSERR, its contents are undefined. - * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure - */ -static int -bluetooth_string_to_address (void *cls, - const char *addr, - uint16_t addrlen, - void **buf, - size_t *added) -{ - struct WlanAddress *wa; - unsigned int a[6]; - unsigned int i; - char plugin[10]; - uint32_t options; - - if ((NULL == addr) || (addrlen == 0)) - { - GNUNET_break (0); - return GNUNET_SYSERR; - } - if ('\0' != addr[addrlen - 1]) - { - GNUNET_break (0); - return GNUNET_SYSERR; - } - if (strlen (addr) != addrlen - 1) - { - GNUNET_break (0); - return GNUNET_SYSERR; - } - - if (8 != SSCANF (addr, - "%9s.%u.%X:%X:%X:%X:%X:%X", - plugin, &options, - &a[0], &a[1], &a[2], &a[3], &a[4], &a[5])) - { - GNUNET_break (0); - return GNUNET_SYSERR; - } - wa = GNUNET_new (struct WlanAddress); - for (i=0;i<6;i++) - wa->mac.mac[i] = a[i]; - wa->options = htonl (0); - *buf = wa; - *added = sizeof (struct WlanAddress); - return GNUNET_OK; -} - - -static void -bluetooth_plugin_update_session_timeout (void *cls, - const struct GNUNET_PeerIdentity *peer, - struct Session *session) -{ - if (GNUNET_SCHEDULER_NO_TASK != session->timeout_task) - GNUNET_SCHEDULER_cancel (session->timeout_task); - session->timeout_task - = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, - &session_timeout, - session); -} - - -/** - * Entry point for the plugin. - * - * @param cls closure, the `struct GNUNET_TRANSPORT_PluginEnvironment *` - * @return the `struct GNUNET_TRANSPORT_PluginFunctions *` or NULL on error - */ -void * -libgnunet_plugin_transport_bluetooth_init (void *cls) -{ - struct GNUNET_TRANSPORT_PluginEnvironment *env = cls; - struct GNUNET_TRANSPORT_PluginFunctions *api; - struct Plugin *plugin; - char *interface; - unsigned long long testmode; - char *binary; - - /* check for 'special' mode */ - if (NULL == env->receive) - { - /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully - initialze the plugin or the API */ - api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions); - api->cls = NULL; - api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer; - api->address_to_string = &bluetooth_plugin_address_to_string; - api->string_to_address = &bluetooth_string_to_address; - return api; - } - - testmode = 0; - /* check configuration */ - if ( (GNUNET_YES == - GNUNET_CONFIGURATION_have_value (env->cfg, "transport-bluetooth", "TESTMODE")) && - ( (GNUNET_SYSERR == - GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-bluetooth", - "TESTMODE", &testmode)) || - (testmode > 2) ) ) - { - GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, - "transport-bluetooth", "TESTMODE"); - return NULL; - } - binary = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-transport-bluetooth"); - if ( (0 == testmode) && - (GNUNET_YES != GNUNET_OS_check_helper_binary (binary, GNUNET_YES, NULL)) ) - { - LOG (GNUNET_ERROR_TYPE_ERROR, - _("Helper binary `%s' not SUID, cannot run bluetooth transport\n"), - "gnunet-helper-transport-bluetooth"); - GNUNET_free (binary); - return NULL; - } - GNUNET_free (binary); - if (GNUNET_YES != - GNUNET_CONFIGURATION_get_value_string - (env->cfg, "transport-bluetooth", "INTERFACE", - &interface)) - { - GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, - "transport-bluetooth", "INTERFACE"); - return NULL; - } - - plugin = GNUNET_new (struct Plugin); - plugin->interface = interface; - plugin->env = env; - GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth sessions allocated"), - 0, GNUNET_NO); - GNUNET_STATISTICS_set (plugin->env->stats, _("# Bluetooth MAC endpoints allocated"), - 0, 0); - GNUNET_BANDWIDTH_tracker_init (&plugin->tracker, NULL, NULL, - GNUNET_BANDWIDTH_value_init (100 * 1024 * - 1024 / 8), 100); - plugin->fragment_data_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin); - plugin->wlan_header_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin); - plugin->helper_payload_tokenizer = GNUNET_SERVER_mst_create (&process_data, plugin); - plugin->beacon_task = GNUNET_SCHEDULER_add_now (&send_hello_beacon, - plugin); - - plugin->options = 0; - - /* some compilers do not like switch on 'long long'... */ - switch ((unsigned int) testmode) - { - case 0: /* normal */ - plugin->helper_argv[0] = (char *) "gnunet-helper-transport-bluetooth"; - plugin->helper_argv[1] = interface; - plugin->helper_argv[2] = NULL; - plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO, - "gnunet-helper-transport-bluetooth", - plugin->helper_argv, - &handle_helper_message, - NULL, - plugin); - break; - case 1: /* testmode, peer 1 */ - plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy"; - plugin->helper_argv[1] = (char *) "1"; - plugin->helper_argv[2] = NULL; - plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO, - "gnunet-helper-transport-wlan-dummy", - plugin->helper_argv, - &handle_helper_message, - NULL, - plugin); - break; - case 2: /* testmode, peer 2 */ - plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy"; - plugin->helper_argv[1] = (char *) "2"; - plugin->helper_argv[2] = NULL; - plugin->suid_helper = GNUNET_HELPER_start (GNUNET_NO, - "gnunet-helper-transport-wlan-dummy", - plugin->helper_argv, - &handle_helper_message, - NULL, - plugin); - break; - default: - GNUNET_assert (0); - } - - api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions); - api->cls = plugin; - api->send = &bluetooth_plugin_send; - api->get_session = &bluetooth_plugin_get_session; - api->disconnect_peer = &bluetooth_plugin_disconnect_peer; - api->disconnect_session = &bluetooth_plugin_disconnect_session; - api->query_keepalive_factor = &bluetooth_query_keepalive_factor; - api->address_pretty_printer = &bluetooth_plugin_address_pretty_printer; - api->check_address = &bluetooth_plugin_address_suggested; - api->address_to_string = &bluetooth_plugin_address_to_string;; - api->string_to_address = &bluetooth_string_to_address; - api->get_network = &bluetooth_get_network; - api->update_session_timeout = &bluetooth_plugin_update_session_timeout; - - return api; -} - - -/* end of plugin_transport_bluetooth.c */ -- cgit v1.2.3