/*
- This file is part of GNUnet
- (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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.
- */
+ 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_wlan.c
* @brief transport plugin for wlan
* @author David Brodski
+ * @author Christian Grothoff
*/
-
#include "platform.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
#include "gnunet_crypto_lib.h"
-#include "wlan/ieee80211.h"
+#include "gnunet_fragmentation_lib.h"
+#include "gnunet_constants.h"
-#define PROTOCOL_PREFIX "wlan"
+#define LOG(kind,...) GNUNET_log_from (kind, "transport-wlan",__VA_ARGS__)
/**
- * Max size of packet from helper
+ * Max size of packet (that we give to the WLAN driver for transmission)
*/
-#define WLAN_MTU 3000
+#define WLAN_MTU 1430
/**
- * Time until retransmission of a fragment in ms
+ * time out of a mac endpoint
*/
-#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
-
-#define FRAGMENT_QUEUE_SIZE 10
-#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1
-
-#define MESSAGE_IN_TIMEOUT GNUNET_TIME_UNIT_SECONDS
-
-#define MESSAGES_IN_QUEUE_SIZE 10
-#define MESSAGES_IN_QUEUE_PER_SESSION 1
-
-#define HALLO_BEACON_SCALING_FACTOR 900
-
-#define DEBUG_wlan GNUNET_YES
-
-#define MESSAGE_LENGHT_UNKNOWN -1
-//#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
+#define MACENDPOINT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, 2)
/**
- * After how long do we expire an address that we
- * learned from another peer if it is not reconfirmed
- * by anyone?
+ * 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 LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
+#define HELLO_BEACON_SCALING_FACTOR GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
/**
- * Initial handshake message for a session.
+ * Maximum number of messages in defragmentation queue per MAC
*/
-struct WelcomeMessage
-{
- /**
- * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME.
- */
- struct GNUNET_MessageHeader header;
+#define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 2
- /**
- * Identit*mac_y of the node connecting (TCP client)
- */
- struct GNUNET_PeerIdentity clientIdentity;
+/**
+ * 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
/**
- * Encapsulation of all of the state of the plugin.
+ * 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 Plugin
+struct WlanHeader
{
- /**
- * Our environment.
- */
- struct GNUNET_TRANSPORT_PluginEnvironment *env;
-
- /**
- * List of open sessions. head
- */
- struct Sessionqueue *sessions;
-
- /**
- * List of open sessions. tail
- */
- struct Sessionqueue *sessions_tail;
-
- /**
- * Number of sessions
- */
-
- int session_count;
/**
- * encapsulation of data from the local wlan helper program
+ * Message type is GNUNET_MESSAGE_TYPE_WLAN_DATA.
*/
-
- struct GNUNET_SERVER_MessageStreamTokenizer * suid_tokenizer;
+ struct GNUNET_MessageHeader header;
/**
- * encapsulation of packets received
+ * CRC32 checksum (only over the payload), in NBO.
*/
-
- struct GNUNET_SERVER_MessageStreamTokenizer * data_tokenizer;
+ uint32_t crc GNUNET_PACKED;
/**
- * stdout pipe handle for the gnunet-wlan-helper process
+ * Sender of the message.
*/
- struct GNUNET_DISK_PipeHandle *server_stdout;
+ struct GNUNET_PeerIdentity sender;
/**
- * stdout file handle for the gnunet-wlan-helper process
+ * Target of the message.
*/
- const struct GNUNET_DISK_FileHandle *server_stdout_handle;
+ struct GNUNET_PeerIdentity target;
- /**
- * stdin pipe handle for the gnunet-wlan-helper process
- */
- struct GNUNET_DISK_PipeHandle *server_stdin;
+ /* followed by payload, possibly including
+ multiple messages! */
- /**
- * stdin file handle for the gnunet-wlan-helper process
- */
- const struct GNUNET_DISK_FileHandle *server_stdin_handle;
+};
+GNUNET_NETWORK_STRUCT_END
- /**
- * ID of the gnunet-wlan-server std read task
- */
- GNUNET_SCHEDULER_TaskIdentifier server_read_task;
+/**
+ * Information kept for each message that is yet to be fragmented and
+ * transmitted.
+ */
+struct PendingMessage
+{
/**
- * ID of the gnunet-wlan-server std read task
+ * next entry in the DLL
*/
- GNUNET_SCHEDULER_TaskIdentifier server_write_task;
+ struct PendingMessage *next;
/**
- * ID of the delay task for writing
+ * previous entry in the DLL
*/
- GNUNET_SCHEDULER_TaskIdentifier server_write_delay_task;
+ struct PendingMessage *prev;
/**
- * The process id of the wlan process
+ * The pending message
*/
- struct GNUNET_OS_Process *server_proc;
+ struct WlanHeader *msg;
/**
- * The interface of the wlan card given to us by the user.
+ * Continuation function to call once the message
+ * has been sent. Can be NULL if there is no
+ * continuation to call.
*/
- char *interface;
+ GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
/**
- * The mac_address of the wlan card given to us by the helper.
+ * Cls for transmit_cont
*/
- struct MacAddress mac_address;
+ void *transmit_cont_cls;
/**
- * Sessions currently pending for transmission
- * to this peer, if any.
+ * Timeout task (for this message).
*/
- struct Sessionqueue * pending_Sessions;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
- /**
- * Sessions currently pending for transmission
- * to this peer (tail), if any.
- */
- struct Sessionqueue * pending_Sessions_tail;
+};
- /**
- * number of pending sessions
- */
- unsigned int pendingsessions;
+/**
+ * Session handle for connections with other peers.
+ */
+struct Session
+{
/**
- * Messages in the fragmentation queue, head
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
*/
-
- struct FragmentMessage * pending_Fragment_Messages_head;
+ struct GNUNET_PeerIdentity target;
/**
- * Messages in the fragmentation queue, tail
+ * API requirement (must be first).
*/
-
- struct FragmentMessage * pending_Fragment_Messages_tail;
+ struct SessionHeader header;
/**
- * number of pending fragment message
+ * We keep all sessions in a DLL at their respective
+ * 'struct MACEndpoint'.
*/
-
- unsigned int pending_fragment_messages;
+ struct Session *next;
/**
- * Messages in the in Queue, head
+ * We keep all sessions in a DLL at their respective
+ * 'struct MACEndpoint'.
*/
-
- struct Receive_Message_Queue * receive_messages_head;
+ struct Session *prev;
/**
- * Messages in the in Queue, tail
+ * MAC endpoint with the address of this peer.
*/
-
- struct Receive_Message_Queue * receive_messages_teil;
+ struct MacEndpoint *mac;
/**
- * number of messages in the in queue
+ * Head of messages currently pending for transmission to this peer.
*/
-
- unsigned int pending_receive_messages;
+ struct PendingMessage *pending_message_head;
/**
- * time of the next "hello-beacon"
+ * Tail of messages currently pending for transmission to this peer.
*/
-
- struct GNUNET_TIME_Absolute beacon_time;
+ struct PendingMessage *pending_message_tail;
/**
- * queue to send acks for received fragments (head)
+ * When should this session time out?
*/
-
- struct AckSendQueue * ack_send_queue_head;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * queue to send acks for received fragments (tail)
+ * Timeout task (for the session).
*/
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
- struct AckSendQueue * ack_send_queue_tail;
-
-};
-
-/**
- * Struct to store data if file write did not accept the whole packet
- */
-struct Finish_send
-{
- struct Plugin * plugin;
- char * msgheader;
- struct GNUNET_MessageHeader * msgstart;
- ssize_t size;
-};
-
-/**
- * Queue of sessions, for the general session queue and the pending session queue
- */
-
-struct Sessionqueue
-{
- struct Sessionqueue * next;
- struct Sessionqueue * prev;
- struct Session * content;
};
-/**
- * Queue for the fragments received
- */
-
-struct Receive_Fragment_Queue
-{
- struct Receive_Fragment_Queue * next;
- struct Receive_Fragment_Queue * prev;
- uint16_t num;
- const char * msg;
- uint16_t size;
-};
/**
- * Queue for the fragments received
+ * Struct for messages that are being fragmented in a MAC's transmission queue.
*/
-
-struct Receive_Message_Queue
+struct FragmentMessage
{
- struct Receive_Message_Queue * next;
-
- struct Receive_Message_Queue * prev;
-
- /**
- * current number for message incoming, to distinguish between the messages
- */
- uint32_t message_id_in;
-
- /**
- * size of the message received,
- * MESSAGE_LENGHT_UNKNOWN means that the size is not known,
- * NO_MESSAGE_OR_MESSAGE_FINISHED means no message received
- */
-
- int rec_size;
/**
- * Sorted queue with the fragments received; head
+ * This is a doubly-linked list.
*/
-
- struct Receive_Fragment_Queue * frag_head;
+ struct FragmentMessage *next;
/**
- * Sorted queue with the fragments received; tail
+ * This is a doubly-linked list.
*/
-
- struct Receive_Fragment_Queue * frag_tail;
+ struct FragmentMessage *prev;
/**
- * Session this fragment belongs to
+ * MAC endpoint this message belongs to
*/
-
- struct Session * session;
+ struct MacEndpoint *macendpoint;
/**
- * Timeout value for the pending message.
+ * Fragmentation context
*/
- struct GNUNET_TIME_Absolute timeout;
+ struct GNUNET_FRAGMENT_Context *fragcontext;
/**
- * Bitfield of received fragments
+ * Transmission handle to helper (to cancel if the frag context
+ * is destroyed early for some reason).
*/
-
- uint64_t received_fragments;
-};
-
-/**
- * Information kept for each message that is yet to
- * be transmitted.
- */
-struct PendingMessage
-{
+ struct GNUNET_HELPER_SendHandle *sh;
/**
- * The pending message
+ * Intended recipient.
*/
- char *msg;
+ struct GNUNET_PeerIdentity target;
/**
- * Size of the message
+ * Timeout value for the message.
*/
- size_t message_size;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * Continuation function to call once the message
- * has been sent. Can be NULL if there is no
- * continuation to call.
+ * Timeout task.
*/
- GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
/**
- * Cls for transmit_cont
+ * Continuation to call when we're done with this message.
*/
- void * transmit_cont_cls;
+ GNUNET_TRANSPORT_TransmitContinuation cont;
/**
- * Timeout value for the pending message.
+ * Closure for 'cont'
*/
- struct GNUNET_TIME_Absolute timeout;
+ void *cont_cls;
};
+
/**
- * Queue for acks to send for fragments recived
+ * Struct to represent one network card connection
*/
-//TODO comments
-struct AckSendQueue
+struct MacEndpoint
{
- struct AckSendQueue * next;
- struct AckSendQueue * prev;
-
- struct Session * session;
/**
- * ID of message, to distinguish between the messages, picked randomly.
+ * We keep all MACs in a DLL in the plugin.
*/
- uint32_t message_id;
+ struct MacEndpoint *next;
/**
- * Bit field for received fragments
+ * We keep all MACs in a DLL in the plugin.
*/
- uint64_t fragments_field;
-
-};
+ struct MacEndpoint *prev;
-/**
- * Session infos gathered from a messages
- */
-
-struct Session_light
-{
/**
- * the session this message belongs to
+ * Pointer to the global plugin struct.
*/
- struct Session * session;
+ struct Plugin *plugin;
+
/**
- * peer mac address
+ * Head of sessions that use this MAC.
*/
- uint8_t addr[6];
-};
-
-/**
- * Session handle for connections.
- */
-struct Session
-{
+ struct Session *sessions_head;
/**
- * API requirement.
+ * Tail of sessions that use this MAC.
*/
- struct SessionHeader header;
+ struct Session *sessions_tail;
/**
- * Pointer to the global plugin struct.
+ * Head of messages we are currently sending to this MAC.
*/
- struct Plugin *plugin;
+ struct FragmentMessage *sending_messages_head;
/**
- * Message currently pending for transmission
- * to this peer, if any.
+ * Tail of messages we are currently sending to this MAC.
*/
- struct PendingMessage *pending_message;
+ struct FragmentMessage *sending_messages_tail;
/**
- * Message currently pending for transmission
- * to this peer, if any.
+ * Defrag context for this MAC
*/
- struct PendingMessage *pending_message2;
+ struct GNUNET_DEFRAGMENT_Context *defrag;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * When should this endpoint time out?
*/
- struct GNUNET_PeerIdentity target;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * peer mac address
+ * Timeout task.
*/
- char addr[6];
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
/**
- * Address of the other peer (either based on our 'connect'
- * call or on our 'accept' call).
+ * count of messages in the fragment out queue for this mac endpoint
*/
- void *connect_addr;
+ unsigned int fragment_messages_out_count;
/**
- * Last activity on this connection. Used to select preferred
- * connection.
+ * peer mac address
*/
- struct GNUNET_TIME_Absolute last_activity;
+ struct GNUNET_TRANSPORT_WLAN_MacAddress addr;
/**
- * count of messages in the fragment out queue for this session
+ * Desired transmission power for this MAC
*/
-
- int fragment_messages_out_count;
+ uint16_t tx_power;
/**
- * count of messages in the fragment in queue for this session
+ * Desired transmission rate for this MAC
*/
-
- int fragment_messages_in_count;
-
- //TODO DOXIGEN
uint8_t rate;
- uint16_t tx_power;
+
+ /**
+ * Antenna we should use for this MAC
+ */
uint8_t antenna;
};
+
/**
- * Struct for Messages in the fragment queue
+ * Encapsulation of all of the state of the plugin.
*/
-
-struct FragmentMessage
+struct Plugin
{
/**
- * Session this message belongs to
- */
-
- struct Session *session;
-
- /**
- * This is a doubly-linked list.
+ * Our environment.
*/
- struct FragmentMessage *next;
+ struct GNUNET_TRANSPORT_PluginEnvironment *env;
/**
- * This is a doubly-linked list.
- */
- struct FragmentMessage *prev;
+ * Handle to helper process for priviledged operations.
+ */
+ struct GNUNET_HELPER_Handle *suid_helper;
/**
- * The pending message
+ * ARGV-vector for the helper (all helpers take only the binary
+ * name, one actual argument, plus the NULL terminator for 'argv').
*/
- char *msg;
+ char * helper_argv[3];
/**
- * Timeout value for the pending message.
+ * The interface of the wlan card given to us by the user.
*/
- struct GNUNET_TIME_Absolute timeout;
+ char *interface;
/**
- * Timeout value for the pending fragments.
- * Stores the time when the next msg fragment ack has to be received
+ * Tokenizer for demultiplexing of data packets resulting from defragmentation.
*/
- struct GNUNET_TIME_Absolute next_ack;
+ struct GNUNET_SERVER_MessageStreamTokenizer *fragment_data_tokenizer;
/**
- * bitfield with all acks received for this message
+ * Tokenizer for demultiplexing of data packets received from the suid helper
*/
- uint64_t ack_bitfield;
+ struct GNUNET_SERVER_MessageStreamTokenizer *helper_payload_tokenizer;
/**
- * Size of the message
+ * Tokenizer for demultiplexing of data packets that follow the WLAN Header
*/
- size_t message_size;
+ struct GNUNET_SERVER_MessageStreamTokenizer *wlan_header_payload_tokenizer;
/**
- * pos / next fragment number in the message, for fragmentation/segmentation,
- * some acks can be missing but there is still time
+ * Head of list of open connections.
*/
- uint32_t message_pos;
+ struct MacEndpoint *mac_head;
/**
- * current number for message outgoing, to distinguish between the messages
+ * Tail of list of open connections.
*/
- uint32_t message_id_out;
-};
-
-/**
- * Header for messages which need fragmentation
- */
-struct WlanHeader
-{
-
- struct GNUNET_MessageHeader header;
+ struct MacEndpoint *mac_tail;
/**
- * checksum/error correction
+ * Number of connections
*/
- uint32_t crc GNUNET_PACKED;
+ unsigned int mac_count;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * Task that periodically sends a HELLO beacon via the helper.
*/
- struct GNUNET_PeerIdentity target;
-
-// followed by payload
-
-};
-
-/**
- * Header for messages which need fragmentation
- */
-struct FragmentationHeader
-{
-
- struct GNUNET_MessageHeader header;
+ GNUNET_SCHEDULER_TaskIdentifier beacon_task;
/**
- * ID of message, to distinguish between the messages, picked randomly.
+ * Tracker for bandwidth limit
*/
- uint32_t message_id GNUNET_PACKED;
+ struct GNUNET_BANDWIDTH_Tracker tracker;
/**
- * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ * The mac_address of the wlan card given to us by the helper.
*/
- uint16_t fragment_off_or_num GNUNET_PACKED;
+ struct GNUNET_TRANSPORT_WLAN_MacAddress mac_address;
/**
- * CRC of fragment (for error checking)
+ * Have we received a control message with our MAC address yet?
*/
- uint16_t message_crc GNUNET_PACKED;
+ int have_mac;
-// followed by payload
};
+
/**
- * Header for messages which need fragmentation
+ * Information associated with a message. Can contain
+ * the session or the MAC endpoint associated with the
+ * message (or both).
*/
-struct FragmentationAckHeader
+struct MacAndSession
{
-
- struct GNUNET_MessageHeader header;
-
/**
- * ID of message, to distinguish between the messages, picked randomly.
+ * NULL if the identity of the other peer is not known.
*/
- uint32_t message_id GNUNET_PACKED;
+ struct Session *session;
/**
- * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ * MAC address of the other peer, NULL if not known.
*/
- uint64_t fragment_field GNUNET_PACKED;
-
+ struct MacEndpoint *endpoint;
};
-int
-getRadiotapHeader(struct Plugin * plugin, struct Session * session,
- struct Radiotap_Send * Header);
-int
-getWlanHeader(struct ieee80211_frame * Header, const char * to_mac_addr,
- struct Plugin * plugin);
-
-static int
-wlan_plugin_address_suggested(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];
-uint16_t
-getcrc16(const char *msgbuf, size_t msgbuf_size);
+ 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;
+}
-static void
-do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+/**
+ * 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
-check_fragment_queue(struct Plugin * plugin);
+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;
+ }
+}
-uint32_t
-getcrc32(const char *msgbuf, size_t msgbuf_size);
+/**
+ * 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
-free_receive_message(struct Plugin* plugin,
- struct Receive_Message_Queue * rec_message);
-
-struct Receive_Message_Queue *
-get_receive_message_from_session(struct Plugin * plugin,
- struct Session * session);
+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?
+}
-static void
-wlan_data_helper(void *cls, struct Session_light * session_light,
- const struct GNUNET_MessageHeader * hdr);
+/**
+ * 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
-wlan_process_helper(void *cls, void *client,
- const struct GNUNET_MessageHeader *hdr);
+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,
+ size);
+ 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, _("# WLAN ACKs sent"),
+ 1, GNUNET_NO);
+}
-static void
-finish_sending(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-static void
-wlan_data_massage_handler(struct Plugin * plugin,
- struct Session_light * session_light,
- const struct GNUNET_MessageHeader * hdr);
-
-static const char *
-wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen);
-
-struct Receive_Message_Queue *
-get_receive_message(struct Plugin * plugin, struct Session * session,
- uint32_t message_id);
-
-static uint64_t
-htonll(uint64_t input)
-{
- return input;
-}
-
-static uint64_t
-ntohll(uint64_t input)
-{
- return input;
-}
/**
- * Sets a bit active in the bitArray. Increment bit-specific
- * usage counter on disk only if below 4bit max (==15).
+ * Handles the data after all fragments are put together
*
- * @param bitArray memory area to set the bit in
- * @param bitIdx which bit to set
+ * @param cls macendpoint this messages belongs to
+ * @param hdr pointer to the data
*/
static void
-setBit(char *bitArray, unsigned int bitIdx)
-{
- size_t arraySlot;
- unsigned int targetBit;
-
- arraySlot = bitIdx / 8;
- targetBit = (1L << (bitIdx % 8));
- bitArray[arraySlot] |= targetBit;
+wlan_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,
+ _("# WLAN 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);
}
+
/**
- * Clears a bit from bitArray. Bit is cleared from the array
- * only if the respective usage counter on the disk hits/is zero.
+ * Free a session
*
- * @param bitArray memory area to set the bit in
- * @param bitIdx which bit to unset
+ * @param session the session free
*/
-/*static void
- clearBit(char *bitArray, unsigned int bitIdx)
- {
- size_t slot;
- unsigned int targetBit;
+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->target,
+ 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, _("# WLAN sessions allocated"), -1,
+ GNUNET_NO);
+ GNUNET_free (session);
+}
- slot = bitIdx / 8;
- targetBit = (1L << (bitIdx % 8));
- bitArray[slot] = bitArray[slot] & (~targetBit);
- }*/
/**
- * Checks if a bit is active in the bitArray
+ * A session is timing out. Clean up.
*
- * @param bitArray memory area to set the bit in
- * @param bitIdx which bit to test
- * @return GNUNET_YES if the bit is set, GNUNET_NO if not.
+ * @param cls pointer to the Session
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
*/
-static int
-testBit(char *bitArray, unsigned int bitIdx)
+static void
+session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- size_t slot;
- unsigned int targetBit;
-
- slot = bitIdx / 8;
- targetBit = (1L << (bitIdx % 8));
- if (bitArray[slot] & targetBit)
- return GNUNET_YES;
- else
- return GNUNET_NO;
-}
+ struct Session * session = cls;
+ struct GNUNET_TIME_Relative timeout;
-/**
- * get the next message number, at the moment just a random one
- * @return returns the next valid message-number for sending packets
- */
-uint32_t
-get_next_message_id()
-{
- return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
+ session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ timeout = GNUNET_TIME_absolute_get_remaining (session->timeout);
+ if (0 == timeout.rel_value)
+ {
+ free_session (session);
+ return;
+ }
+ session->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (timeout, &session_timeout, session);
}
-/**
- * start next message number generator
- * (not necessary at the moment)
- */
-void
-start_next_message_id()
-{
- //GNUNET_CRYPTO_random_init;
-}
/**
- * search for a session with the addr
+ * Create a new session
*
- * @param plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
+ * @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 *
-search_session(struct Plugin *plugin, const uint8_t * addr)
+create_session (struct MacEndpoint *endpoint,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * lastitem = NULL;
+ struct Session *session;
- //just look at all the session for the needed one
- while (queue != NULL)
+ for (session = endpoint->sessions_head; NULL != session; session = session->next)
+ if (0 == memcmp (peer, &session->target,
+ sizeof (struct GNUNET_PeerIdentity)))
{
- // content is never NULL
- GNUNET_assert (queue->content != NULL);
- char * addr2 = queue->content->addr;
- if (memcmp(addr, addr2, 6) == 0)
- {
- //sesion found
- return queue->content;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
+ session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
+ return session;
}
- return NULL;
+ GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# WLAN sessions allocated"), 1,
+ GNUNET_NO);
+ session = GNUNET_malloc (sizeof (struct Session));
+ GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head,
+ endpoint->sessions_tail,
+ session);
+ 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));
+ return session;
}
+
/**
- * create a new session
+ * 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 plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
- * @return returns the session
+ * @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 struct Session *
-create_session(struct Plugin *plugin, const uint8_t * addr)
+static void
+fragment_transmission_done (void *cls,
+ int result)
{
- struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+ struct FragmentMessage *fm = cls;
- GNUNET_CONTAINER_DLL_insert_tail(plugin->sessions, plugin->sessions_tail, queue);
+ fm->sh = NULL;
+ GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
+}
- queue->content = GNUNET_malloc (sizeof (struct Session));
- queue->content->plugin = plugin;
- memcpy(queue->content->addr, addr, 6);
- queue->content->fragment_messages_out_count = 0;
- queue->content->fragment_messages_in_count = 0;
- plugin->session_count++;
+/**
+ * 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,
+ size);
+ 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);
+ if (NULL != fm->sh)
+ GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# WLAN message fragments sent"),
+ 1, GNUNET_NO);
+ else
+ GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
+ }
+}
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "New session %p with %s\n",
- queue->content, wlan_plugin_address_to_string(NULL, addr, 6));
-#endif
- return queue->content;
+/**
+ * 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, _("# WLAN 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);
+ if (fm->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (fm->timeout_task);
+ fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_free (fm);
}
+
/**
- * get Session from address, create if no session exists
+ * A FragmentMessage has timed out. Remove it.
*
- * @param plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
- * @return returns the session
+ * @param cls pointer to the 'struct FragmentMessage'
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
*/
-//TODO add other possibilities to find the right session (are there other?)
-static struct Session *
-get_Session(struct Plugin *plugin, const uint8_t * addr)
+static void
+fragmentmessage_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Session * session = search_session(plugin, addr);
- if (session != NULL)
- {
- return session;
- }
- // new session
- return create_session(plugin, addr);
-
- /* -- not needed, layer above already has it--
- //queue welcome message for new sessions, not realy needed
- //struct WelcomeMessage welcome;
- struct PendingMessage *pm;
- pm = GNUNET_malloc (sizeof (struct PendingMessage));
- pm->msg = GNUNET_malloc(GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->message_size = GNUNET_HELLO_size(* (plugin->env->our_hello));
- //welcome.header.size = htons (GNUNET_HELLO_size(* (plugin->env->our_hello)));
- //welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
- //welcome.clientIdentity = *plugin->env->my_identity;
- memcpy ( (pm->msg), * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
- queue->content->pending_message = pm;
- plugin->pendingsessions ++;
- GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions, plugin->pending_Sessions_tail, queue);
-
- check_fragment_queue(plugin);
- */
+ 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->cont = NULL;
+ }
+ free_fragment_message (fm);
}
+
/**
- * Queue the session to send data
+ * 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 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
*/
-//TODO doxigen
static void
-queue_Session(struct Plugin *plugin, struct Session * session)
+send_with_fragmentation (struct MacEndpoint *endpoint,
+ struct GNUNET_TIME_Relative timeout,
+ const struct GNUNET_PeerIdentity *target,
+ const struct GNUNET_MessageHeader *msg,
+ GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
+
{
- struct Sessionqueue * queue = plugin->pending_Sessions;
- struct Sessionqueue * lastitem = NULL;
+ struct FragmentMessage *fm;
+ struct Plugin *plugin;
- while (queue != NULL)
- {
- // content is never NULL
- GNUNET_assert (queue->content != NULL);
- // is session already in queue?
- if (session == queue->content)
- {
- return;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
- }
+ plugin = endpoint->plugin;
+ fm = GNUNET_malloc (sizeof (struct FragmentMessage));
+ fm->macendpoint = endpoint;
+ fm->target = *target;
+ fm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ fm->cont = cont;
+ fm->cont_cls = cont_cls;
+ fm->fragcontext =
+ GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
+ &plugin->tracker,
+ GNUNET_TIME_UNIT_SECONDS,
+ 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);
+}
- // Session is not in the queue
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
- queue->content = session;
+/**
+ * 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;
- //insert at the tail
- GNUNET_CONTAINER_DLL_insert_after (plugin->pending_Sessions,
- plugin->pending_Sessions_tail,
- plugin->pending_Sessions_tail, queue);
- plugin->pendingsessions++;
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ _("# WLAN 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);
}
-//TODO doxigen
+
/**
- * Function to schedule the write task, executed after a delay
+ * A MAC endpoint is timing out. Clean up.
+ *
+ * @param cls pointer to the MacEndpoint
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
*/
static void
-delay_fragment_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Plugin * plugin = cls;
- plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ struct MacEndpoint *endpoint = cls;
+ struct GNUNET_TIME_Relative timeout;
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ timeout = GNUNET_TIME_absolute_get_remaining (endpoint->timeout);
+ if (0 == timeout.rel_value)
+ {
+ free_macendpoint (endpoint);
return;
+ }
+ endpoint->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (timeout, &macendpoint_timeout,
+ endpoint);
+}
- // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
- if (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK)
- {
- plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
- &do_transmit, plugin);
- }
+
+/**
+ * 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,
+ const struct GNUNET_TRANSPORT_WLAN_MacAddress *addr)
+{
+ struct MacEndpoint *pos;
+
+ for (pos = plugin->mac_head; NULL != pos; pos = pos->next)
+ if (0 == memcmp (addr, &pos->addr, sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
+ return pos;
+ pos = GNUNET_malloc (sizeof (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,
+ &wlan_data_message_handler,
+ &send_ack);
+ 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, _("# WLAN MAC endpoints allocated"),
+ 1, GNUNET_NO);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New MAC endpoint `%s'\n",
+ mac_to_string (addr));
+ return pos;
}
-//TODO doxigen
+
/**
- * Function to calculate the time of the next periodic "hello-beacon"
+ * 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 void
-set_next_beacon_time(struct Plugin * const plugin)
+static struct Session *
+wlan_plugin_get_session (void *cls,
+ const struct GNUNET_HELLO_Address *address)
{
- //under 10 known peers: once a second
- if (plugin->session_count < 10)
- {
- plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(
- GNUNET_TIME_UNIT_SECONDS, HALLO_BEACON_SCALING_FACTOR));
- }
- //under 30 known peers: every 10 seconds
- else if (plugin->session_count < 30)
- {
- plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(
- GNUNET_TIME_UNIT_SECONDS, 10 * HALLO_BEACON_SCALING_FACTOR));
- }
- //over 30 known peers: once a minute
- else
- {
- plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(
- GNUNET_TIME_UNIT_MINUTES, HALLO_BEACON_SCALING_FACTOR));
- }
+ struct Plugin *plugin = cls;
+ struct MacEndpoint *endpoint;
+
+ if (NULL == address)
+ return NULL;
+ if (sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress) != 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),
+ mac_to_string (address->address));
+ endpoint = create_macendpoint (plugin, address->address);
+ return create_session (endpoint, &address->peer);
}
-//TODO doxigen
-struct GNUNET_TIME_Relative
-get_next_frag_timeout(struct FragmentMessage * fm)
+
+/**
+ * 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
+wlan_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
{
- return GNUNET_TIME_relative_min(GNUNET_TIME_absolute_get_remaining(
- fm->next_ack), GNUNET_TIME_absolute_get_remaining(fm->timeout));
+ 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!) */
+ }
}
-//TODO doxigen
+
/**
- * Function to get the timeout value for acks for this session
+ * 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)
*/
-
-struct GNUNET_TIME_Relative
-get_ack_timeout(struct FragmentMessage * fm)
+static ssize_t
+wlan_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)
{
- return FRAGMENT_TIMEOUT;
+ 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);
+ send_with_fragmentation (session->mac,
+ to,
+ &session->target,
+ &wlanheader->header,
+ cont, cont_cls);
+ return size;
}
+
/**
- * Function to set the timer for the next timeout of the fragment queue
- * @param plugin the handle to the plugin struct
+ * 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 void
-check_next_fragment_timeout(struct Plugin * const plugin)
+static int
+process_data (void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
{
- struct FragmentMessage * fm;
- struct GNUNET_TIME_Relative next_send;
-
- //cancel old task
- if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ struct Plugin *plugin = cls;
+ struct MacAndSession *mas = client;
+ struct MacAndSession xmas;
+#define NUM_ATS 2
+ struct GNUNET_ATS_Information ats[NUM_ATS]; /* FIXME: do better here */
+ struct FragmentMessage *fm;
+ struct GNUNET_PeerIdentity tmpsource;
+ const struct WlanHeader *wlanheader;
+ int ret;
+ uint16_t msize;
+
+ ats[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
+ ats[0].value = htonl (1);
+ ats[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
+ ats[1].value = htonl (GNUNET_ATS_NET_WLAN);
+ msize = ntohs (hdr->size);
+ switch (ntohs (hdr->type))
+ {
+ case GNUNET_MESSAGE_TYPE_HELLO:
+ if (GNUNET_OK !=
+ GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hdr, &tmpsource))
{
- GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
- plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_break_op (0);
+ break;
}
- fm = plugin->pending_Fragment_Messages_head;
-
- GNUNET_assert(plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK);
-
- //check if some acks are in the queue
- if (plugin->ack_send_queue_head != NULL)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing %u bytes of HELLO from peer `%s' at MAC %s\n",
+ (unsigned int) msize,
+ GNUNET_i2s (&tmpsource),
+ mac_to_string (&mas->endpoint->addr));
+
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ _("# HELLO messages received via WLAN"), 1,
+ GNUNET_NO);
+ plugin->env->receive (plugin->env->cls,
+ &tmpsource,
+ hdr,
+ ats, NUM_ATS,
+ mas->session,
+ (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
+ (mas->endpoint == NULL) ? 0 : sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
+ break;
+ case GNUNET_MESSAGE_TYPE_FRAGMENT:
+ if (NULL == mas->endpoint)
{
- next_send = GNUNET_TIME_UNIT_ZERO;
+ GNUNET_break (0);
+ break;
}
- //check if there are some fragments in the queue
- else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing %u bytes of FRAGMENT from MAC %s\n",
+ (unsigned int) msize,
+ mac_to_string (&mas->endpoint->addr));
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ _("# fragments received via WLAN"), 1, GNUNET_NO);
+ (void) GNUNET_DEFRAGMENT_process_fragment (mas->endpoint->defrag,
+ hdr);
+ break;
+ case GNUNET_MESSAGE_TYPE_FRAGMENT_ACK:
+ if (NULL == mas->endpoint)
{
- next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
- if (fm != NULL)
+ GNUNET_break (0);
+ break;
+ }
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# ACKs received via WLAN"),
+ 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",
+ mac_to_string (&mas->endpoint->addr),
+ fm);
+ mas->endpoint->timeout = GNUNET_TIME_relative_to_absolute (MACENDPOINT_TIMEOUT);
+ if (NULL != fm->cont)
{
- next_send
- = GNUNET_TIME_relative_min(next_send, get_next_frag_timeout(fm));
+ fm->cont (fm->cont_cls, &fm->target, GNUNET_OK);
+ 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",
+ mac_to_string (&mas->endpoint->addr));
+ break;
+ }
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "ACK not matched against any active fragmentation with MAC `%s'\n",
+ mac_to_string (&mas->endpoint->addr));
+ break;
+ case GNUNET_MESSAGE_TYPE_WLAN_DATA:
+ if (NULL == mas->endpoint)
+ {
+ GNUNET_break (0);
+ break;
}
- plugin->server_write_delay_task = GNUNET_SCHEDULER_add_delayed(next_send,
- &delay_fragment_task, plugin);
+ 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,
+ "WLAN 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,
+ _("# WLAN 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 WLAN 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->target,
+ hdr,
+ ats, NUM_ATS,
+ mas->session,
+ (mas->endpoint == NULL) ? NULL : (const char *) &mas->endpoint->addr,
+ (mas->endpoint == NULL) ? 0 : sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
+ break;
+ }
+ return GNUNET_OK;
}
+#undef NUM_ATS
+
-//TODO doxigen
/**
- * Function to get the next queued Session, removes the session from the queue
+ * 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 struct Session *
-get_next_queue_Session(struct Plugin * plugin)
+static int
+handle_helper_message (void *cls, void *client,
+ const struct GNUNET_MessageHeader *hdr)
{
- struct Session * session;
- struct Sessionqueue * sessionqueue;
- struct Sessionqueue * sessionqueue_alt;
- struct PendingMessage * pm;
- sessionqueue = plugin->pending_Sessions;
- while (sessionqueue != NULL)
+ struct Plugin *plugin = cls;
+ const struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage *rxinfo;
+ const struct GNUNET_TRANSPORT_WLAN_HelperControlMessage *cm;
+ 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)
{
- session = sessionqueue->content;
-
- pm = session->pending_message;
- if (pm == NULL)
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- "pending message is empty, should not happen. session %p\n",
- session);
-#endif
- }
- GNUNET_assert(pm != NULL);
-
- //check for message timeout
- if (GNUNET_TIME_absolute_get_remaining(pm->timeout).rel_value > 0)
- {
- //check if session has no message in the fragment queue
- if (session->fragment_messages_out_count
- < FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION)
- {
- plugin->pendingsessions--;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, sessionqueue);
- GNUNET_free(sessionqueue);
-
- return session;
- }
- else
- {
- sessionqueue = sessionqueue->next;
- }
- }
- else
- {
-
- session->pending_message = session->pending_message2;
- session->pending_message2 = NULL;
-
- //call the cont func that it did not work
- if (pm->transmit_cont != NULL)
- pm->transmit_cont(pm->transmit_cont_cls, &(session->target),
- GNUNET_SYSERR);
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
-
- if (session->pending_message == NULL)
- {
- sessionqueue_alt = sessionqueue;
- sessionqueue = sessionqueue->next;
- plugin->pendingsessions--;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, sessionqueue_alt);
-
- GNUNET_free(sessionqueue_alt);
- }
-
- }
+ if (0 == memcmp (&plugin->mac_address,
+ &cm->mac,
+ sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress)))
+ break; /* no change */
+ /* remove old address */
+ plugin->env->notify_address (plugin->env->cls, GNUNET_NO,
+ &plugin->mac_address,
+ sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
+ }
+ plugin->mac_address = cm->mac;
+ plugin->have_mac = GNUNET_YES;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received WLAN_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,
+ &plugin->mac_address,
+ sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
+ 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 WLAN"), 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;
}
- return NULL;
+ 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,
+ _("# WLAN 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));
+ mas.endpoint = create_macendpoint (plugin, &rxinfo->frame.addr2);
+ 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;
}
+
+
/**
- * Function to sort the message into the message fragment queue
- * @param plugin the plugin struct
- * @param fm message to sort into the queue
+ * Task to (periodically) send a HELLO beacon
+ *
+ * @param cls pointer to the plugin struct
+ * @param tc scheduler context
*/
static void
-sort_fragment_into_queue(struct Plugin * plugin, struct FragmentMessage * fm)
+send_hello_beacon (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct FragmentMessage * fm2;
- //sort into the list at the right position
-
- fm2 = plugin->pending_Fragment_Messages_head;
-
- while (fm2 != NULL)
- {
- if (GNUNET_TIME_absolute_get_difference(fm2->next_ack, fm->next_ack).rel_value
- == 0)
- {
- GNUNET_CONTAINER_DLL_insert_before(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail,fm2,fm);
- return;
- }
- else
- {
- fm2 = fm2->next;
- }
- }
+ 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 WLAN"),
+ 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);
- GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail,fm);
}
+
/**
- * frees the space of a message in the fragment queue (send queue)
- * @param plugin the plugin struct
- * @param fm message to free
+ * 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 addr
+ * @return GNUNET_OK if this is a plausible address for this peer
+ * and transport
*/
-static void
-free_fragment_message(struct Plugin * plugin, struct FragmentMessage * fm)
+static int
+wlan_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
{
- if (fm != NULL)
- {
- (fm->session->fragment_messages_out_count)--;
- GNUNET_free_non_null(fm->msg);
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
- GNUNET_free(fm);
- plugin->pending_fragment_messages--;
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "free pending fragment messages, pending messages remaining %u\n",
- plugin->pending_fragment_messages);
-#endif
- }
+ struct Plugin *plugin = cls;
+
+ if (addrlen != sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress))
+ {
+ 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 (addr,
+ &plugin->mac_address,
+ addrlen))
+ {
+ 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 to check if there is some space in the fragment queue
- * inserts a message if space is available
- * @param plugin the plugin struct
+ * 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 address
+ * @return string representing the same address
*/
-
-static void
-check_fragment_queue(struct Plugin * plugin)
+static const char *
+wlan_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
{
- struct Session * session;
- struct FragmentMessage * fm;
- struct GNUNET_PeerIdentity pid;
+ const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac;
- struct PendingMessage * pm;
-
- if (plugin->pending_fragment_messages < FRAGMENT_QUEUE_SIZE)
- {
- session = get_next_queue_Session(plugin);
- if (session != NULL)
- {
- pm = session->pending_message;
- session->pending_message = NULL;
- session->fragment_messages_out_count++;
- GNUNET_assert(pm != NULL);
-
- fm = GNUNET_malloc(sizeof(struct FragmentMessage));
- fm->message_size = pm->message_size;
- fm->msg = pm->msg;
- fm->session = session;
- fm->timeout.abs_value = pm->timeout.abs_value;
- fm->message_pos = 0;
- fm->next_ack = GNUNET_TIME_absolute_get();
- fm->message_id_out = get_next_message_id();
- fm->ack_bitfield = 0;
-
- sort_fragment_into_queue(plugin, fm);
- plugin->pending_fragment_messages++;
-
- if (pm->transmit_cont != NULL)
- {
- pid = session->target;
- pm->transmit_cont(pm->transmit_cont_cls, &pid, GNUNET_OK);
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "called pm->transmit_cont for %p\n", session);
-#endif
- }
- else
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "no pm->transmit_cont for %p\n", session);
-#endif
- }
- GNUNET_free(pm);
-
- if (session->pending_message2 != NULL)
- {
- session->pending_message = session->pending_message2;
- session->pending_message2 = NULL;
- //requeue session
- queue_Session(plugin, session);
- }
-
- //check if timeout changed
- check_next_fragment_timeout(plugin);
- }
- }
+ if (sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress) != addrlen)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ mac = addr;
+ return GNUNET_strdup (mac_to_string (mac));
}
+
/**
- * Funktion to check if all fragments where send and the acks received
- * frees the space if finished
- * @param plugin the plugin struct
- * @param fm the message to check
- */
-static void
-check_finished_fragment(struct Plugin * plugin, struct FragmentMessage * fm)
-{
- //maxack = size of message / max packet size, eg 12 / 5 = 2 start at 0 so ack numbers are 0,1,2
- unsigned int maxack = 63 - ((fm->message_size - 1) / (WLAN_MTU
- - sizeof(struct FragmentationHeader)));
- uint64_t tmpfield = UINT64_MAX;
- tmpfield = tmpfield >> maxack;
-
- //#if DEBUG_wlan
- if (maxack != 63)
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Test bitfields %X and %X, maxack is %u, fm size %u\n",
- fm->ack_bitfield, tmpfield, maxack, fm->message_size);
- //#endif
-
- if (fm->ack_bitfield == tmpfield)
- {
-
- free_fragment_message(plugin, fm);
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Finished sending and got all acks for a fragmented message\n");
-#endif
-
- check_next_fragment_timeout(plugin);
- check_fragment_queue(plugin);
-
- }
-}
-
-/**
- * Function to set the next fragment number
- * @param fm use this FragmentMessage
- */
-
-void
-set_next_message_fragment_pos(struct FragmentMessage * fm)
-{
-
- //check if retransmit is needed
- if (GNUNET_TIME_absolute_get_remaining(fm->next_ack).rel_value == 0)
- {
-
- // be positive and try again later :-D
- fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(fm));
- // find first missing fragment
-
- fm->message_pos = 0;
- }
-
- //test if ack 0 (or X) was already received
- while (testBit((char*) &fm->ack_bitfield, fm->message_pos) == GNUNET_YES)
- {
- fm->message_pos++;
- }
-
-}
-
-void
-send_hello_beacon(struct Plugin * plugin)
-{
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending hello beacon\n");
-#endif
-
- uint16_t size = 0;
- ssize_t bytes;
- struct GNUNET_MessageHeader * msgheader = NULL;
- struct ieee80211_frame * ieeewlanheader = NULL;
- struct Radiotap_Send * radioHeader = NULL;
- struct GNUNET_MessageHeader * msgheader2 = NULL;
-
- GNUNET_assert(sizeof(struct WlanHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello)) <= WLAN_MTU);
- size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
- + sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader)
- + GNUNET_HELLO_size(*(plugin->env->our_hello));
-
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct Radiotap_Send*) &msgheader[1];
- getRadiotapHeader(plugin, NULL, radioHeader);
- ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
- getWlanHeader(ieeewlanheader, bc_all_mac, plugin);
-
- msgheader2 = (struct GNUNET_MessageHeader*) &ieeewlanheader[1];
- msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello))
- + sizeof(struct GNUNET_MessageHeader));
-
- msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
- memcpy(&msgheader2[1], *plugin->env->our_hello, GNUNET_HELLO_size(
- *(plugin->env->our_hello)));
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
-
- if (bytes == GNUNET_SYSERR)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
- errno, strerror(errno));
-
- }
- GNUNET_assert(bytes != GNUNET_SYSERR);
- GNUNET_assert(bytes == size);
- GNUNET_free(msgheader);
-
- set_next_beacon_time(plugin);
- check_next_fragment_timeout(plugin);
-}
-
-static void
-send_ack(struct Plugin * plugin, struct AckSendQueue * ack)
-{
-
- uint16_t size = 0;
- ssize_t bytes;
- struct GNUNET_MessageHeader * msgheader = NULL;
- struct ieee80211_frame * ieeewlanheader = NULL;
- struct Radiotap_Send * radioHeader = NULL;
- struct FragmentationAckHeader * msgheader2 = NULL;
-
- GNUNET_assert(sizeof(struct FragmentationAckHeader) <= WLAN_MTU);
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Sending ack for message_id %u with fragment field %u\n",
- ack->message_id, ack->fragments_field);
-#endif
-
- size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
- + sizeof(struct ieee80211_frame) + sizeof(struct FragmentationAckHeader);
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct Radiotap_Send*) &msgheader[1];
- getRadiotapHeader(plugin, ack->session, radioHeader);
- ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
- getWlanHeader(ieeewlanheader, ack->session->addr, plugin);
-
- msgheader2 = (struct FragmentationAckHeader*) &ieeewlanheader[1];
- msgheader2->header.size = htons(sizeof(struct FragmentationAckHeader));
- msgheader2->header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK);
- msgheader2->message_id = htonl(ack->message_id);
- msgheader2->fragment_field = htonll(ack->fragments_field);
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
- if (bytes == GNUNET_SYSERR)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
- errno, strerror(errno));
-
- }
- GNUNET_assert(bytes != GNUNET_SYSERR);
- GNUNET_assert(bytes == size);
- GNUNET_free(msgheader);
- check_next_fragment_timeout(plugin);
-}
-
-/**
- * Function called when wlan helper is ready to get some data
- *
- * @param cls closure
- * @param tc GNUNET_SCHEDULER_TaskContext
- */
-
-static void
-do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
-
- struct Plugin * plugin = cls;
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
-
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- struct Session * session = NULL;
- struct FragmentMessage * fm = NULL;
- struct ieee80211_frame * ieeewlanheader = NULL;
- struct Radiotap_Send * radioHeader = NULL;
- struct GNUNET_MessageHeader * msgheader = NULL;
-
- struct FragmentationHeader fragheader;
- struct FragmentationHeader * fragheaderptr = NULL;
- struct Finish_send * finish = NULL;
- struct AckSendQueue * ack;
- uint16_t size = 0;
- ssize_t bytes;
- const char * copystart = NULL;
- uint16_t copysize = 0;
- uint copyoffset = 0;
-
- if (plugin->ack_send_queue_head != NULL)
- {
- ack = plugin->ack_send_queue_head;
- GNUNET_CONTAINER_DLL_remove(plugin->ack_send_queue_head,
- plugin->ack_send_queue_tail, ack);
- send_ack(plugin, ack);
- GNUNET_free(ack);
- return;
- }
-
- //test if a "hello-beacon" has to be send
- if (GNUNET_TIME_absolute_get_remaining(plugin->beacon_time).rel_value == 0)
- {
- send_hello_beacon(plugin);
-
- return;
-
- }
-
- fm = plugin->pending_Fragment_Messages_head;
- if (fm != NULL)
- {
- session = fm->session;
- GNUNET_assert(session != NULL);
-
- // test if message timed out
- if (GNUNET_TIME_absolute_get_remaining(fm->timeout).rel_value == 0)
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "message timeout\n");
-#endif
-
- check_fragment_queue(plugin);
- free_fragment_message(plugin, fm);
-
- }
- else
- {
-
- //if (fm->message_size > WLAN_MTU)
- // {
- size += sizeof(struct FragmentationHeader);
-
- set_next_message_fragment_pos(fm);
-
- copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader))
- * fm->message_pos;
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Sending GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT with message_id %u with fragment number %i, size: %u, offset %u, time until timeout %u\n",
- fm->message_id_out, fm->message_pos, copysize
- + sizeof(struct FragmentationHeader), copyoffset,
- GNUNET_TIME_absolute_get_remaining(fm->timeout));
-#endif
-
- fragheader.fragment_off_or_num = htons(fm->message_pos);
- fragheader.message_id = htonl(fm->message_id_out);
- copystart = fm->msg + copyoffset;
- copysize = GNUNET_MIN(fm->message_size - copyoffset,
- WLAN_MTU - sizeof(struct FragmentationHeader));
-
- if (copyoffset >= fm->message_size)
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_ERROR,
- "offset in message for fragment too large, offset %u, size %u, max size %u, copysize %u, message_pos %u,\n",
- copyoffset, fm->message_size, WLAN_MTU
- - sizeof(struct FragmentationHeader), copysize,
- fm->message_pos);
- }
- GNUNET_assert(copyoffset < fm->message_size);
- //FIXME remove later
- GNUNET_assert(copystart < fm->msg + fm->message_size);
-
- fragheader.header.size = htons(copysize
- + sizeof(struct FragmentationHeader));
- fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
-
- /* }
- else
- {
- // there is no need to split
- copystart = fm->msg;
- copysize = fm->message_size;
- }*/
-
- size += copysize;
- size += sizeof(struct Radiotap_Send) + sizeof(struct ieee80211_frame)
- + sizeof(struct GNUNET_MessageHeader);
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct Radiotap_Send*) &msgheader[1];
- getRadiotapHeader(plugin, session, radioHeader);
-
- ieeewlanheader = (struct ieee80211_frame *) &radioHeader[1];
- getWlanHeader(ieeewlanheader, fm->session->addr, plugin);
-
- //could be faster if content is just send and not copyed before
- //fragmentheader is needed
- //if (fm->message_size > WLAN_MTU)
- // {
- fragheader.message_crc = htons(getcrc16(copystart, copysize));
- memcpy(&ieeewlanheader[1], &fragheader,
- sizeof(struct FragmentationHeader));
- fragheaderptr = (struct FragmentationHeader *) &ieeewlanheader[1];
- memcpy(&fragheaderptr[1], copystart, copysize);
- /* }
- else
- {
- memcpy(&ieeewlanheader[1], copystart, copysize);
- }*/
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle,
- msgheader, size);
- if (bytes == GNUNET_SYSERR)
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_ERROR,
- _("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
- errno, strerror(errno));
-
- }
- GNUNET_assert(bytes != GNUNET_SYSERR);
-
- if (bytes != size)
- {
- finish = GNUNET_malloc(sizeof( struct Finish_send));
- finish->plugin = plugin;
- finish->msgheader = (char *) msgheader + bytes;
- finish->size = size - bytes;
- finish->msgstart = msgheader;
-
- GNUNET_assert(plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK);
-
- plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
- &finish_sending, finish);
-
- }
- else
- {
- GNUNET_assert(bytes == size);
-
- GNUNET_free(msgheader);
- check_next_fragment_timeout(plugin);
- }
-
- //check if this was the last fragment of this message, if true then queue at the end of the list
- if (copysize + copyoffset >= fm->message_size)
- {
- GNUNET_assert(copysize + copyoffset == fm->message_size);
-
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
-
- GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
- // if fragments have opimized timeouts
- //sort_fragment_into_queue(plugin,fm);
-
- }
-
- }
- return;
- }
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "do_transmit did nothing, should not happen!\n");
-}
-
-static void
-finish_sending(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Finish_send * finish;
- struct Plugin * plugin;
- ssize_t bytes;
-
- finish = cls;
- plugin = finish->plugin;
-
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle,
- finish->msgheader, finish->size);
- GNUNET_assert(bytes != GNUNET_SYSERR);
-
- GNUNET_assert(plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK);
- if (bytes != finish->size)
- {
-
- finish->msgheader = finish->msgheader + bytes;
- finish->size = finish->size - bytes;
- plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
- &finish_sending, finish);
- }
- else
- {
- GNUNET_free(finish->msgstart);
- GNUNET_free(finish);
- check_next_fragment_timeout(plugin);
- }
-
-}
-
-int
-getRadiotapHeader(struct Plugin * plugin, struct Session * session,
- struct Radiotap_Send * header)
-{
-
- if (session != null){
- header->rate = session->rate;
- header->tx_power = session->tx_power;
- header->antenna = session->antenna;
- } else {
- header->rate = 255;
- header->tx_power = 0;
- header->antenna = 0;
- }
-
- return GNUNET_YES;
-}
-;
-
-/**
- * function to generate the wlan hardware header for one packet
- * @param Header address to write the header to
- * @param to_mac_addr address of the recipient
- * @param plugin pointer to the plugin struct
- * @return GNUNET_YES if there was no error
- */
-
-int
-getWlanHeader(struct ieee80211_frame * Header, const char * const to_mac_addr,
- struct Plugin * plugin)
-{
- memcpy(&Header->i_addr3, mac_bssid, sizeof(mac_bssid));
- memcpy(&Header->i_addr2, plugin->mac_address.mac, sizeof(plugin->mac_address));
- memcpy(&Header->i_addr1, to_mac_addr, sizeof(plugin->mac_address));
- return GNUNET_YES;
-}
-
-/**
- * 32bit CRC
- *
- * @param msgbuf pointer tor the data
- * @param msgbuf_size size of the data
- *
- * @return 32bit crc value
- */
-
-uint32_t
-getcrc32(const char *msgbuf, size_t msgbuf_size)
-{
- //TODO calc some crc
- return 0;
-}
-
-/**
- * 16bit CRC
- *
- * @param msgbuf pointer tor the data
- * @param msgbuf_size size of the data
- *
- * @return 16bit crc value
- */
-
-uint16_t
-getcrc16(const char *msgbuf, size_t msgbuf_size)
-{
- //TODO calc some crc
- return 0;
-}
-
-/**
- * Function that can be used by the transport service to transmit
- * a message using the plugin.
- *
- * @param cls closure
- * @param target who should receive this message
- * @param priority how important is the message
- * @param msgbuf the message to transmit
- * @param msgbuf_size number of bytes in 'msgbuf'
- * @param timeout when should we time out
- * @param session which session must be used (or NULL for "any")
- * @param addr the address to use (can be NULL if the plugin
- * is "on its own" (i.e. re-use existing TCP connection))
- * @param addrlen length of the address in bytes
- * @param force_address GNUNET_YES if the plugin MUST use the given address,
- * otherwise the plugin may use other addresses or
- * existing connections (if available)
- * @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...)
- * @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
-wlan_plugin_send(void *cls, const struct GNUNET_PeerIdentity * target,
- const char *msgbuf, size_t msgbuf_size, unsigned int priority,
- struct GNUNET_TIME_Relative timeout, struct Session *session,
- const void *addr, size_t addrlen, int force_address,
- GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
-{
- struct Plugin * plugin = cls;
- struct PendingMessage * newmsg = NULL;
- struct WlanHeader * wlanheader = NULL;
-
- //check if msglen > 0
- GNUNET_assert(msgbuf_size > 0);
-
- //get session if needed
- if (session == NULL)
- {
- if (wlan_plugin_address_suggested(plugin, addr, addrlen) == GNUNET_OK)
- {
- session = get_Session(plugin, addr);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Wlan Address len %d is wrong\n"), addrlen);
- return -1;
- }
- }
-
- //TODO target "problem" not solved
- //if (session->target != NULL){
- // GNUNET_assert(session->target == *target);
- //} else {
- session->target = *target;
- //}
-
-
- //queue message:
-
- //queue message in session
- //test if there is no other message in the "queue"
- //FIXME: to many send requests
- //GNUNET_assert (session->pending_message == NULL);
- if (session->pending_message != NULL)
- {
- newmsg = session->pending_message;
- GNUNET_log(
- GNUNET_ERROR_TYPE_ERROR,
- "wlan_plugin_send: a pending message is already in the queue for this client\n remaining time to send this message is %u, queued fragment messages %u\n",
- GNUNET_TIME_absolute_get_remaining(newmsg->timeout).rel_value,
- session->fragment_messages_out_count);
- if (session->pending_message2 != NULL)
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_ERROR,
- "wlan_plugin_send: two pending messages are already in the queue for this client\n");
- return -1;
- }
- }
-
- newmsg = GNUNET_malloc(sizeof(struct PendingMessage));
- (newmsg->msg) = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader));
- wlanheader = (struct WlanHeader *) newmsg->msg;
- //copy msg to buffer, not fragmented / segmented yet, but with message header
- wlanheader->header.size = htons(msgbuf_size + sizeof(struct WlanHeader));
- wlanheader->header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_DATA);
- memcpy(&(wlanheader->target), target, sizeof(struct GNUNET_PeerIdentity));
- wlanheader->crc = htonl(getcrc32(msgbuf, msgbuf_size));
- memcpy(&wlanheader[1], msgbuf, msgbuf_size);
- newmsg->transmit_cont = cont;
- newmsg->transmit_cont_cls = cont_cls;
- newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout);
-
- newmsg->timeout.abs_value = newmsg->timeout.abs_value - 500;
-
- newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
-
- if (session->pending_message == NULL)
- {
- session->pending_message = newmsg;
- }
- else
- {
- session->pending_message2 = newmsg;
- }
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "New message for %p with size (incl wlan header) %u added\n", session,
- newmsg->message_size);
-#endif
-
- //queue session
- queue_Session(plugin, session);
-
- check_fragment_queue(plugin);
- //FIXME not the correct size
- return msgbuf_size;
-
-}
-
-/**
- * function to get the first message in the fragement queue (out) of a session
- * @param session pointer to the session
- * @return pointer to the struct FragmentMessage
- */
-static struct FragmentMessage *
-get_fragment_message_from_session(struct Session * session)
-{
- struct FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
- while (fm != NULL)
- {
- if (fm->session == session)
- {
- return fm;
- }
- fm = fm->next;
- }
- return NULL;
-}
-
-/**
- * function to get the message in the fragement queue (out) of a session with a specific id
- * @param session pointer to the session
- * @param message_id id of the message
- * @return pointer to the struct FragmentMessage
- */
-static struct FragmentMessage *
-get_fragment_message_from_session_and_id(struct Session * session,
- uint32_t message_id)
-{
- struct FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
- while (fm != NULL)
- {
- if ((fm->session == session) && (fm->message_id_out == message_id))
- {
- return fm;
- }
- fm = fm->next;
- }
- return NULL;
-}
-
-/**
- * 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
-wlan_plugin_disconnect(void *cls, const struct GNUNET_PeerIdentity *target)
-{
- struct Plugin *plugin = cls;
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * pendingsession = plugin->pending_Sessions;
- struct PendingMessage * pm = NULL;
- struct FragmentMessage * fm;
- struct Receive_Message_Queue * receive_queue;
-
- // just look at all the session for the needed one
- while (queue != NULL)
- {
- // content is never NULL
- GNUNET_assert (queue->content != NULL);
- if (memcmp(target, &(queue->content->target),
- sizeof(struct GNUNET_PeerIdentity)) == 0)
- {
- //session found
- //is this session pending for send
- while (pendingsession != NULL)
- {
- if (pendingsession->content == queue->content)
- {
- plugin->pendingsessions--;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, pendingsession);
- GNUNET_free(pendingsession);
- break;
- }
- pendingsession = pendingsession->next;
- }
-
- //is something of this session in the fragment queue?
- fm = get_fragment_message_from_session(queue->content);
- while (fm != NULL)
- {
- free_fragment_message(plugin, fm);
- fm = get_fragment_message_from_session(queue->content);
- }
- check_next_fragment_timeout(plugin);
-
- //dispose all received fragments
- receive_queue = get_receive_message_from_session(plugin,
- queue->content);
- while (receive_queue != NULL)
- {
- free_receive_message(plugin, receive_queue);
- receive_queue = get_receive_message_from_session(plugin,
- queue->content);
- }
-
- // remove PendingMessage
- pm = queue->content->pending_message;
- if (pm != NULL)
- {
- GNUNET_free_non_null(pm->msg);
- GNUNET_free(pm);
- }
-
- GNUNET_free(queue->content);
- GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
- GNUNET_free(queue);
- plugin->session_count--;
-
- return;
- }
- // try next
- queue = queue->next;
- }
-}
-
-/**
- * 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 address
- * @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 asc
- */
-static void
-wlan_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)
-{
- char ret[92];
- const unsigned char * input;
-
- //GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
- {
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- asc(asc_cls, NULL);
- return;
- }
- input = (const unsigned char*) addr;
- GNUNET_snprintf(ret, sizeof(ret),
- "%s Mac-Address %.2X:%.2X:%.2X:%.2X:%.2X:%.2X", PROTOCOL_PREFIX,
- input[0], input[1], input[2], input[3], input[4], input[5]);
- asc(asc_cls, ret);
-}
-
-/**
- * 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 addr
- * @return GNUNET_OK if this is a plausible address for this peer
- * and transport
- */
-
-static int
-wlan_plugin_address_suggested(void *cls, const void *addr, size_t addrlen)
-{
- //struct Plugin *plugin = cls;
-
- /* check if the address is plausible; if so,
- add it to our list! */
-
- GNUNET_assert(cls !=NULL);
- //FIXME mitm is not checked
- //Mac Address has 6 bytes
- if (addrlen == 6)
- {
- /* TODO check for bad addresses like multicast, broadcast, etc */
- return GNUNET_OK;
- }
-
- return GNUNET_SYSERR;
-}
-
-/**
- * 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 address
- * @return string representing the same address
- */
-static const char*
-wlan_plugin_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
-{
- static char ret[40];
- const struct MacAddress *mac;
-
- if (addrlen != sizeof (struct MacAddress))
- {
- GNUNET_break (0);
- return NULL;
- }
- mac = addr;
- GNUNET_snprintf(ret, sizeof(ret),
- "%s Mac-Address %X:%X:%X:%X:%X:%X",
- PROTOCOL_PREFIX,
- mac->mac[0], mac->mac[1],
- mac->mac[2], mac->mac[3],
- mac->mac[4], mac->mac[5]);
- return ret;
-}
-
-/**
- * function to check if bitfield is representation of fragments of the message
- * @param rec_message message to check
- */
-
-void
-check_message_fragment_bitfield(struct Receive_Message_Queue * rec_message)
-{
- uint64_t checkfragments = 0;
- struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
-
- while (rec_queue != NULL)
- {
- setBit((char*) &checkfragments, rec_queue->num);
- rec_queue = rec_queue->next;
-
- }
- GNUNET_assert(checkfragments == rec_message->received_fragments);
-}
-
-/**
- * Function to test if fragment number already exists in the fragments received
- *
- * @param rec_message message this fragment belongs to
- * @param fh Fragmentheader of the fragment
- * @return GNUNET_YES if fragment exists already, GNUNET_NO if it does not exists in the queue of the session
- */
-
-static const int
-is_double_msg(struct Receive_Message_Queue * rec_message,
- struct FragmentationHeader * fh)
-{
- //test if bitfield is okay
-#if DEBUG_wlan
- check_message_fragment_bitfield(rec_message);
-#endif
-
- return testBit((char *) &rec_message->received_fragments, ntohs(
- fh->fragment_off_or_num));
-
-}
-
-/**
- * Function to insert a fragment in a queue of a message
- * @param session session the fragment belongs to
- * @param rec_queue fragment to add
- */
-
-static void
-insert_fragment_in_queue(struct Receive_Message_Queue * rec_message,
- struct Receive_Fragment_Queue * rec_queue)
-{
- GNUNET_assert(rec_message != NULL);
- GNUNET_assert(rec_queue != NULL);
-
- struct Receive_Fragment_Queue * rec_queue2 = rec_message->frag_head;
- struct WlanHeader * wlanheader = NULL;
-
- //this is the first fragment of the message (fragment id 0)
- if (rec_queue->num == 0)
- {
- wlanheader = (struct WlanHeader *) rec_queue->msg;
- rec_message->rec_size = ntohs(wlanheader->header.size);
- }
-
- //sort into list
- while (rec_queue2 != NULL)
- {
- if (rec_queue2->num > rec_queue->num)
- {
- //next element number is grater than the current num
- GNUNET_CONTAINER_DLL_insert_before(rec_message->frag_head, rec_message->frag_tail, rec_queue2, rec_queue);
- setBit((char *) &rec_message->received_fragments, rec_queue->num);
- return;
- }
- rec_queue = rec_queue->next;
- }
- //no element has a grater number
- GNUNET_CONTAINER_DLL_insert_tail(rec_message->frag_head, rec_message->frag_tail, rec_queue);
-
- setBit((char *) &rec_message->received_fragments, rec_queue->num);
-}
-
-/**
- * Function to dispose the fragments received for a message and the message
- * @param plugin pointer to the plugin struct
- * @param rec_message pointer to the struct holding the message which should be freed
- */
-
-static void
-free_receive_message(struct Plugin* plugin,
- struct Receive_Message_Queue * rec_message)
-{
- GNUNET_assert(rec_message !=NULL);
- struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
- struct Receive_Fragment_Queue * rec_queue2;
-
- while (rec_queue != NULL)
- {
- rec_queue2 = rec_queue;
- rec_queue = rec_queue->next;
- GNUNET_free(rec_queue2);
- }
-
- GNUNET_CONTAINER_DLL_remove(plugin->receive_messages_head,plugin->receive_messages_teil, rec_message);
-
- GNUNET_assert(plugin->pending_receive_messages > 0);
- GNUNET_assert(rec_message->session->fragment_messages_in_count > 0);
-
- plugin->pending_receive_messages--;
- rec_message->session->fragment_messages_in_count--;
- GNUNET_free(rec_message);
-}
-
-/**
- * Function to check if all fragments of a message have been received
- * @param plugin the plugin handle
- * @param session_light information of the message sender
- * @param session session the message belongs to
- * @param rec_message pointer to the message that should be checked
- */
-
-static void
-check_rec_finished_msg(struct Plugin* plugin,
- struct Session_light * session_light, struct Session * session,
- struct Receive_Message_Queue * rec_message)
-{
- GNUNET_assert(rec_message !=NULL);
-
- struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
- int packetsize = rec_message->rec_size;
- int sum = 0;
- int aktnum = 0;
- uint64_t bitfield = 0;
- char * msg;
-
- //check if first fragment is present
- if (packetsize == MESSAGE_LENGHT_UNKNOWN)
- {
- return;
- }
- // test if message has at least the size of the WlanHeader and a GNUNET_MessageHeader
- else if (packetsize < sizeof(struct WlanHeader)
- + sizeof(struct GNUNET_MessageHeader))
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Message not big enough\n");
-#endif
- free_receive_message(plugin, rec_message);
- return;
- }
-
-#if DEBUG_wlan
- check_message_fragment_bitfield(rec_message);
-#endif
-
- bitfield = ~bitfield;
- bitfield = bitfield >> (63 - rec_message->frag_tail->num);
- if (rec_message->received_fragments == bitfield)
- {
-
- while (rec_queue != NULL)
- {
- sum += rec_queue->size;
- rec_queue = rec_queue->next;
- }
- //sum should always be smaller or equal of
- GNUNET_assert(sum <= packetsize);
- if (sum == packetsize)
- {
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "check_rec_finished_msg: A message for %p is complete\n", session);
-#endif
-
- //TODO use mst
- //copy fragments together
- msg = GNUNET_malloc(packetsize);
- rec_queue = rec_message->frag_head;
- aktnum = 0;
- while (rec_queue != NULL)
- {
- //TODO SAVE SOME COPY OPS AND CHECK CRC WITHOUT COPY
- memcpy(msg + aktnum, rec_queue->msg, rec_queue->size);
- aktnum += rec_queue->size;
- rec_queue = rec_queue->next;
- }
- free_receive_message(plugin, rec_message);
- //call wlan_process_helper to process the message
- wlan_data_massage_handler(plugin, session_light,
- (struct GNUNET_MessageHeader*) msg);
- //wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
-
- GNUNET_free(msg);
- }
- }
-}
-
-static void
-process_data(void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
-{
-
- GNUNET_assert(client != NULL);
- GNUNET_assert(cls != NULL);
- struct Session * session = (struct Session *) client;
- struct Plugin * plugin = (struct Plugin *) cls;
-
- struct GNUNET_TRANSPORT_ATS_Information distance[2];
- distance[0].type = htonl(GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
- distance[0].value = htonl(1);
- distance[1].type = htonl(GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
- distance[1].value = htonl(0);
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Calling plugin->env->receive for session %p; %s\n", session,
- wlan_plugin_address_to_string(NULL, session->addr, 6));
-#endif
-
- plugin->env->receive(plugin->env->cls, &(session->target), hdr,
- (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2, session,
- session->addr, sizeof(session->addr));
-}
-
-/**
- * handels the data after all fragments are put together
- * @param plugin
- * @param session_light
- * @param hdr pointer to the data
- */
-static void
-wlan_data_massage_handler(struct Plugin * plugin,
- struct Session_light * session_light,
- const struct GNUNET_MessageHeader * hdr)
-{
- struct WlanHeader * wlanheader = NULL;
- struct Session * session = NULL;
- const char * tempmsg = NULL;
- const struct GNUNET_MessageHeader * temp_hdr = NULL;
- struct GNUNET_PeerIdentity tmptarget;
-
- if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
- {
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_data_massage_handler got GNUNET_MESSAGE_TYPE_WLAN_DATA size: %u\n",
- ntohs(hdr->size));
-#endif
-
- if (ntohs(hdr->size) < sizeof(struct WlanHeader)
- + sizeof(struct GNUNET_MessageHeader))
- {
- //packet not big enought
- return;
- }
-
- GNUNET_assert(session_light != NULL);
- if (session_light->session == NULL)
- {
- session_light->session = search_session(plugin, session_light->addr);
- }
- session = session_light->session;
- wlanheader = (struct WlanHeader *) hdr;
-
- tempmsg = (char*) &wlanheader[1];
- temp_hdr = (const struct GNUNET_MessageHeader *) &wlanheader[1];
-
- if (getcrc32(tempmsg, ntohs(wlanheader->header.size)) != ntohl(
- wlanheader->crc))
- {
- //wrong crc, dispose message
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Wlan message Header crc was wrong\n");
- return;
- }
-
- //if not in session list
- if (session == NULL)
- {
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "WLAN client not in session list: packet size = %u, inner size = %u, header size = %u\n",
- ntohs(wlanheader->header.size), ntohs(temp_hdr->size),
- sizeof(struct WlanHeader));
-#endif
- //try if it is a hello message
- if (ntohs(wlanheader->header.size) >= ntohs(temp_hdr->size)
- + sizeof(struct WlanHeader))
- {
- if (ntohs(temp_hdr->type) == GNUNET_MESSAGE_TYPE_HELLO)
- {
- if (GNUNET_HELLO_get_id(
- (const struct GNUNET_HELLO_Message *) temp_hdr,
- &tmptarget) == GNUNET_OK)
- {
- session = create_session(plugin, session_light->addr);
- session_light->session = session;
- memcpy(&session->target, &tmptarget,
- sizeof(struct GNUNET_PeerIdentity));
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and hello message not okay\n");
- return;
- }
-
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and not a hello message\n");
- return;
- }
- }
- else
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and message size in does not fit\npacket size = %u, inner size = %u, header size = %u\n",
- ntohs(wlanheader->header.size), ntohs(temp_hdr->size),
- sizeof(struct WlanHeader));
- return;
- }
- }
-
- //"receive" the message
-
-
- GNUNET_SERVER_mst_receive(plugin->data_tokenizer, session,
- (const char *) temp_hdr,
- ntohs(hdr->size) - sizeof(struct WlanHeader), GNUNET_YES, GNUNET_NO);
-
- return;
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "wlan_data_massage_handler got wrong message type\n");
- return;
- }
-}
-
-/**
- * function to add an ack to send it for a received fragment
- * @param plugin pointer to the global plugin structure
- * @param session pointer to the session this ack belongs to
- * @param bitfield bitfield to send
- * @param fh pointer to the fragmentation header which we would like to acknolage
- */
-
-void
-add_ack_for_send(struct Plugin * plugin, struct Session * session,
- uint64_t bitfield, struct FragmentationHeader * fh)
-{
- struct AckSendQueue * ack;
-
- GNUNET_assert(plugin != NULL);
- GNUNET_assert(session != NULL);
- GNUNET_assert(fh != NULL);
-
- ack = GNUNET_malloc(sizeof(struct AckSendQueue));
- ack->fragments_field = bitfield;
- ack->message_id = ntohl(fh->message_id);
- ack->session = session;
-
- GNUNET_CONTAINER_DLL_insert_tail(plugin->ack_send_queue_head,
- plugin->ack_send_queue_tail, ack);
-
-}
-
-/**
- * function to get the receive message from the message id and the session
- * @param plugin pointer to the plugin struct
- * @param session session this fragment belongs to
- * @param message_id id of the message
- */
-
-struct Receive_Message_Queue *
-get_receive_message(struct Plugin * plugin, struct Session * session,
- uint32_t message_id)
-{
- struct Receive_Message_Queue * rec_message = plugin->receive_messages_head;
- while (rec_message != NULL)
- {
- if ((rec_message->message_id_in == message_id) && (rec_message->session
- == session))
- {
- return rec_message;
- }
- rec_message = rec_message->next;
- }
- return NULL;
-}
-
-/**
- * function to get the receive message of a session
- * @param plugin pointer to the plugin struct
- * @param session session this fragment belongs to
- */
-
-struct Receive_Message_Queue *
-get_receive_message_from_session(struct Plugin * plugin,
- struct Session * session)
-{
- struct Receive_Message_Queue * rec_message = plugin->receive_messages_head;
- while (rec_message != NULL)
- {
- if (rec_message->session == session)
- {
- return rec_message;
- }
- rec_message = rec_message->next;
- }
- return NULL;
-}
-
-/**
- * function to insert a received fragment into the right fragment queue of the right message
- * @param plugin pointer to the plugin struct
- * @param session_light pointer to the session_light struct of this message
- * @param session session this fragment belongs to
- * @param fh pointer to the header of the fragment
- * @return new fragment bitfield for the message
- */
-
-uint64_t
-insert_fragment_in_in_message_queue(struct Plugin * plugin,
- struct Session_light * session_light, struct Session * session,
- struct FragmentationHeader * fh)
-{
- struct Receive_Fragment_Queue * rec_queue = NULL;
- struct Receive_Message_Queue * rec_message;
- const char * tempmsg = (char*) &fh[1];
- uint64_t retval = 0;
-
- //TODO fragments do not timeout
- //check if message_id is right or it is a new msg
- GNUNET_assert(fh != NULL);
-
- rec_message = get_receive_message(plugin, session, ntohs(fh->message_id));
-
- if (rec_message == NULL)
- {
- if (session->fragment_messages_in_count < MESSAGES_IN_QUEUE_PER_SESSION)
- {
-
- //new message incoming
- rec_message = GNUNET_malloc(sizeof (struct Receive_Message_Queue));
- rec_message->message_id_in = ntohs(fh->message_id);
- rec_message->rec_size = MESSAGE_LENGHT_UNKNOWN;
- rec_message->session = session;
- rec_message->timeout = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), MESSAGE_IN_TIMEOUT);
- rec_message->received_fragments = 0;
-
- GNUNET_CONTAINER_DLL_insert(plugin->receive_messages_head, plugin->receive_messages_teil, rec_message);
-
- session->fragment_messages_in_count++;
- plugin->pending_receive_messages++;
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "New fragmented message started: message id %u, messages in for this session %u, messages in %u\n",
- rec_message->message_id_in, session->fragment_messages_in_count,
- plugin->pending_receive_messages);
-#endif
- }
- else
- {
-
- GNUNET_log(
- GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment message_id and session message_id do not exist, max MESSAGES_IN_QUEUE_PER_SESSION reached\n");
- setBit((char *) &retval, ntohs(fh->fragment_off_or_num));
- return retval;
- }
- }
-
- if (is_double_msg(rec_message, fh) != GNUNET_YES)
- {
-
- //report size
- rec_queue = GNUNET_malloc(sizeof (struct Receive_Fragment_Queue) +
- ntohs(fh->header.size) - sizeof(struct FragmentationHeader));
- rec_queue->size = ntohs(fh->header.size)
- - sizeof(struct FragmentationHeader);
- rec_queue->num = ntohs(fh->fragment_off_or_num);
- rec_queue->msg = (char*) &(rec_queue[1]);
- //copy msg to buffer
- memcpy((char *) rec_queue->msg, tempmsg, rec_queue->size);
- insert_fragment_in_queue(rec_message, rec_queue);
- //save bitfield
- retval = rec_message->received_fragments;
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "New fragment: size %u, fragsize %u, message id %u, bitfield %X, session %u\n",
- rec_message->rec_size, rec_queue->size,
- rec_message->received_fragments, rec_message->message_id_in, session);
-#endif
-
- check_rec_finished_msg(plugin, session_light, session, rec_message);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN fragment is a clone\n");
- retval = rec_message->received_fragments;
-
- }
- return retval;
-
-}
-
-/**
- * Function used for to process the data received from the wlan interface
+ * Convert the transports address to a nice, human-readable format.
*
- * @param cls the plugin handle
- * @param session_light FIXME: document
- * @param hdr hdr of the GNUNET_MessageHeader
+ * @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 address
+ * @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 asc
*/
static void
-wlan_data_helper(void *cls, struct Session_light * session_light,
- const struct GNUNET_MessageHeader * hdr)
-{
- struct Plugin *plugin = cls;
- struct Session * session = NULL;
-
- struct FragmentationHeader * fh = NULL;
- struct FragmentationAckHeader * fah = NULL;
- struct FragmentMessage * fm = NULL;
-
- const char * tempmsg = NULL;
-
- uint64_t fragment_bitfield = 0;
-
- //ADVERTISEMENT
- if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT)
- {
-
- //TODO better DOS protection, error handling
- //TODO test first than create session
- GNUNET_assert(session_light != NULL);
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT size: %u; %s\n",
- ntohs(hdr->size), wlan_plugin_address_to_string(NULL,
- session_light->addr, 6));
-#endif
-
- if (session_light->session == NULL)
- {
- session_light->session = get_Session(plugin, session_light->addr);
- }
- GNUNET_assert(GNUNET_HELLO_get_id(
- (const struct GNUNET_HELLO_Message *) &hdr[1],
- &(session_light->session->target) ) != GNUNET_SYSERR);
-
- }
-
- //FRAGMENT
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT)
- {
-
- GNUNET_assert(session_light != NULL);
- if (session_light->session == NULL)
- {
- session_light->session = search_session(plugin, session_light->addr);
- }
- session = session_light->session;
-
- fh = (struct FragmentationHeader *) hdr;
- tempmsg = (char*) &fh[1];
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT with message_id %u with fragment number %i, size: %u; %s\n",
- ntohl(fh->message_id), ntohs(fh->fragment_off_or_num), ntohs(
- hdr->size), wlan_plugin_address_to_string(NULL,
- session_light->addr, 6));
-#endif
-
- if (getcrc16(tempmsg, ntohs(fh->header.size)) != ntohs(fh->message_crc))
- {
- //wrong crc, dispose message
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN fragment crc was wrong\n");
- return;
- }
-
- //if in the session list
- if (session != NULL)
- {
- fragment_bitfield = insert_fragment_in_in_message_queue(plugin,
- session_light, session, fh);
- }
- else
- {
- // new session
- GNUNET_log(
- GNUNET_ERROR_TYPE_INFO,
- "WLAN client not in session list, fragment num %u, message id %u\n",
- ntohs(fh->fragment_off_or_num), ntohs(fh->message_id));
- wlan_data_massage_handler(plugin, session_light,
- (struct GNUNET_MessageHeader *) tempmsg);
- session = session_light->session;
- //test if a session was created
- if (session == NULL)
- {
- return;
- }
- setBit((char *) &fragment_bitfield, ntohs(fh->fragment_off_or_num));
- }
-
- add_ack_for_send(plugin, session, fragment_bitfield, fh);
- check_next_fragment_timeout(plugin);
-
- }
-
- //ACK
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK)
- {
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK size: %u; %s\n",
- ntohs(hdr->size), wlan_plugin_address_to_string(NULL,
- session_light->addr, 6));
-#endif
-
- GNUNET_assert(session_light != NULL);
- if (session_light->session == NULL)
- {
- session_light->session = search_session(plugin, session_light->addr);
- GNUNET_assert(session_light->session != NULL);
- }
- session = session_light->session;
- fah = (struct FragmentationAckHeader *) hdr;
- fm = get_fragment_message_from_session_and_id(session, ntohl(
- fah->message_id));
- if (fm != NULL)
- {
-
- fm->ack_bitfield = fm->ack_bitfield | ntohll(fah->fragment_field);
- check_finished_fragment(plugin, fm);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN fragment not in fragment list with id %u of ack\n", ntohl(
- fah->message_id));
- return;
- }
-
- }
- else
- {
- // TODO Wrong data?
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN packet inside the WLAN helper packet has not the right type\n");
- return;
- }
-
-#if 0
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Helper finished\n");
-#endif
-
-}
-
-
-const char *
-macprinter(const u_int8_t * mac)
-{
- static char macstr[20];
-
- GNUNET_snprintf (macstr,
- sizeof (macstr),
- "%X:%X:%X:%X:%X:%X",
- mac[0], mac[1], mac[2],
- mac[3], mac[4], mac[5]);
- return macstr;
+wlan_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 struct GNUNET_TRANSPORT_WLAN_MacAddress *mac;
+ char *ret;
+
+ if (sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress) != addrlen)
+ {
+ /* invalid address */
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("WLAN address with invalid size encountered\n"));
+ asc (asc_cls, NULL);
+ return;
+ }
+ mac = addr;
+ ret = GNUNET_strdup (mac_to_string (mac));
+ asc (asc_cls, ret);
+ GNUNET_free (ret);
+ asc (asc_cls, NULL);
}
/**
- * Function used for to process the data from the suid process
+ * Exit point from the plugin.
*
- * @param cls the plugin handle
- * @param client client that send the data (not used)
- * @param hdr header of the GNUNET_MessageHeader
+ * @param cls pointer to the api struct
*/
-static void
-wlan_process_helper (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr)
+void *
+libgnunet_plugin_transport_wlan_done (void *cls)
{
- struct Plugin *plugin = cls;
- struct ieee80211_frame * wlanIeeeHeader = NULL;
- struct Session_light * session_light = NULL;
- const struct GNUNET_MessageHeader * temp_hdr = NULL;
-
- int datasize = 0;
- int pos = 0;
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+ struct MacEndpoint *endpoint;
+ struct MacEndpoint *endpoint_next;
- switch (ntohs(hdr->type))
- {
- case GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA:
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA size: %u\n",
- ntohs(hdr->size));
-#endif
-
- //call wlan_process_helper with the message inside, later with wlan: analyze signal
- if (ntohs(hdr->size) < sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- /* FIXME: restart SUID process */
- return;
- }
- wlanIeeeHeader = (struct ieee80211_frame *) &hdr[1];
-
- //process only if it is an broadcast or for this computer both with the gnunet bssid
-
- //check for bssid
- if (memcmp(&(wlanIeeeHeader->i_addr3), mac_bssid,
- sizeof(struct MacAddress)) == 0)
- {
- //check for broadcast or mac
- if (memcmp(&(wlanIeeeHeader->i_addr1), bc_all_mac,
- sizeof(struct MacAddress) == 0) || memcmp(
- &(wlanIeeeHeader->i_addr1), &(plugin->mac_address),
- sizeof(struct MacAddress)) == 0)
- {
-
- // process the inner data
-
-
- datasize = ntohs(hdr->size) - sizeof(struct ieee80211_frame)
- - sizeof(struct GNUNET_MessageHeader);
-
- session_light = GNUNET_malloc(sizeof(struct Session_light));
- memcpy(session_light->addr, &(wlanIeeeHeader->i_addr2),
- sizeof(struct MacAddress));
- //session_light->session = search_session(plugin,session_light->addr);
-
- pos = 0;
- temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1];
- while (pos < datasize)
- {
- temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1]
- + pos;
-
- wlan_data_helper(plugin, session_light, temp_hdr);
- pos += ntohs(temp_hdr->size);
-
- }
-
- //clean up
- GNUNET_free(session_light);
- }
- else
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got wrong MAC: %s\n", macprinter(
- wlanIeeeHeader->i_addr1));
-#endif
- }
- }
- else
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got wrong BSSID: %s\n", macprinter(
- wlanIeeeHeader->i_addr2));
-#endif
- }
- break;
- case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL:
- //TODO more control messages
- //TODO use struct wlan_helper_control
- if (ntohs(hdr->size) != sizeof(struct Wlan_Helper_Control_Message))
- {
- GNUNET_break (0);
- /* FIXME: restart SUID process */
- return;
- }
- memcpy (&plugin->mac_address,
- &hdr[1],
- sizeof(struct MacAddress));
-#if DEBUG_WLAN
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received WLAN_HELPER_CONTROL message with transport of address %s\n",
- wlan_plugin_address_to_string (cls,
- &plugin->mac_address,
- sizeof (struct MacAddress)));
-#endif
- plugin->env->notify_address(plugin->env->cls, "wlan",
- &plugin->mac_address, sizeof(struct MacAddress),
- GNUNET_TIME_UNIT_FOREVER_REL);
- break;
- default:
- GNUNET_break (0);
- return;
- }
+ if (NULL == plugin)
+ {
+ GNUNET_free (api);
+ return NULL;
+ }
+ 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);
+ 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;
}
/**
- * We have been notified that wlan-helper has written something to stdout.
- * Handle the output, then reschedule this function to be called again once
- * more is available.
- *
- * @param cls the plugin handle
- * @param tc the scheduling context
- */
-static void
-wlan_plugin_helper_read(void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Plugin *plugin = cls;
- plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
-
- /*
- #if DEBUG_wlan
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Start reading from STDIN\n");
- #endif
- */
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- char mybuf[WLAN_MTU + sizeof(struct GNUNET_MessageHeader)];
- ssize_t bytes;
-
- bytes = GNUNET_DISK_file_read(plugin->server_stdout_handle, mybuf,
- sizeof(mybuf));
- if (bytes <= 0)
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- _("Finished reading from wlan-helper stdout with code: %d\n"),
- bytes);
-#endif
- return;
- }
- GNUNET_SERVER_mst_receive(plugin->suid_tokenizer, NULL, mybuf, bytes,
- GNUNET_NO, GNUNET_NO);
-
- GNUNET_assert(plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
- plugin->server_read_task = GNUNET_SCHEDULER_add_read_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdout_handle,
- &wlan_plugin_helper_read, plugin);
-}
-
-/**
- * Start the gnunet-wlan-helper process.
+ * Function called to convert a string address to
+ * a binary address.
*
- * @param plugin the transport plugin
- * @param testmode should we use the dummy driver for testing?
- * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
+ * @param cls closure ('struct Plugin*')
+ * @param addr string address
+ * @param addrlen length of the address
+ * @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
-wlan_transport_start_wlan_helper(struct Plugin *plugin, int testmode)
+wlan_string_to_address (void *cls, const char *addr, uint16_t addrlen,
+ void **buf, size_t *added)
{
- const char * filename = "gnunet-transport-wlan-helper";
- plugin->server_stdout = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_NO, GNUNET_YES);
- if (plugin->server_stdout == NULL)
- return GNUNET_SYSERR;
+ struct GNUNET_TRANSPORT_WLAN_MacAddress *mac;
+ unsigned int a[6];
+ unsigned int i;
- plugin->server_stdin = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_YES, GNUNET_NO);
- if (plugin->server_stdin == NULL)
+ if ((NULL == addr) || (addrlen == 0))
+ {
+ GNUNET_break (0);
return GNUNET_SYSERR;
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Starting gnunet-wlan-helper process cmd: %s %s %i\n", filename,
- plugin->interface, testmode);
-#endif
- /* Start the server process */
-
- plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin,
- plugin->server_stdout, filename, filename, plugin->interface, ((testmode
- == 1) ? "1" : (testmode == 2) ? "2" : "0"), NULL);
- if (plugin->server_proc == NULL)
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Failed to start gnunet-wlan-helper process\n");
-#endif
- return GNUNET_SYSERR;
- }
-
- /* Close the write end of the read pipe */
- GNUNET_DISK_pipe_close_end(plugin->server_stdout, GNUNET_DISK_PIPE_END_WRITE);
-
- /* Close the read end of the write pipe */
- GNUNET_DISK_pipe_close_end(plugin->server_stdin, GNUNET_DISK_PIPE_END_READ);
-
- plugin->server_stdout_handle = GNUNET_DISK_pipe_handle(plugin->server_stdout,
- GNUNET_DISK_PIPE_END_READ);
- plugin->server_stdin_handle = GNUNET_DISK_pipe_handle(plugin->server_stdin,
- GNUNET_DISK_PIPE_END_WRITE);
-
- GNUNET_assert(plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Adding server_read_task for the wlan-helper\n");
-#endif
-
- sleep(2);
-
- plugin->server_read_task = GNUNET_SCHEDULER_add_read_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdout_handle,
- &wlan_plugin_helper_read, plugin);
-
- return GNUNET_YES;
+ }
+ if ('\0' != addr[addrlen - 1])
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ if (strlen (addr) != addrlen - 1)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ if (6 != SSCANF (addr,
+ "%X:%X:%X:%X:%X:%X",
+ &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ mac = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress));
+ for (i=0;i<6;i++)
+ mac->mac[i] = a[i];
+ *buf = mac;
+ *added = sizeof (struct GNUNET_TRANSPORT_WLAN_MacAddress);
+ return GNUNET_OK;
}
-/**
- * Exit point from the plugin.
- * @param cls pointer to the api struct
- */
-
-//FIXME cleanup
-void *
-libgnunet_plugin_transport_wlan_done(void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "libgnunet_plugin_transport_wlan_done started\n");
-#endif
-
- GNUNET_assert(cls !=NULL);
-
- if (plugin->suid_tokenizer != NULL)
- GNUNET_SERVER_mst_destroy(plugin->suid_tokenizer);
-
- if (plugin->data_tokenizer != NULL)
- GNUNET_SERVER_mst_destroy(plugin->data_tokenizer);
-
- GNUNET_free_non_null(plugin->interface);
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
-}
/**
* Entry point for the plugin.
* @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error
*/
void *
-libgnunet_plugin_transport_wlan_init(void *cls)
+libgnunet_plugin_transport_wlan_init (void *cls)
{
- //struct GNUNET_SERVICE_Context *service;
struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
struct GNUNET_TRANSPORT_PluginFunctions *api;
struct Plugin *plugin;
- static unsigned long long testmode = 0;
+ char *interface;
+ unsigned long long testmode;
+
+ /* 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_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ api->cls = NULL;
+ api->address_pretty_printer = &wlan_plugin_address_pretty_printer;
+ api->address_to_string = &wlan_plugin_address_to_string;
+ api->string_to_address = &wlan_string_to_address;
+ return api;
+ }
- GNUNET_assert(cls !=NULL);
+ testmode = 0;
+ /* check configuration */
+ if ( (GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (env->cfg, "transport-wlan", "TESTMODE")) &&
+ ( (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-wlan",
+ "TESTMODE", &testmode)) ||
+ (testmode > 2) ) )
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Invalid configuration option `%s' in section `%s'\n"),
+ "TESTMODE",
+ "transport-wlan");
+ return NULL;
+ }
+ if ( (0 == testmode) &&
+ (GNUNET_YES != GNUNET_OS_check_helper_binary ("gnunet-helper-transport-wlan")) )
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Helper binary `%s' not SUID, cannot run WLAN transport\n"),
+ "gnunet-helper-transport-wlan");
+ return NULL;
+ }
+ if (GNUNET_YES !=
+ GNUNET_CONFIGURATION_get_value_string
+ (env->cfg, "transport-wlan", "INTERFACE",
+ &interface))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Missing configuration option `%s' in section `%s'\n"),
+ "INTERFACE",
+ "transport-wlan");
+ return NULL;
+ }
plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin->interface = interface;
plugin->env = env;
- plugin->pendingsessions = 0;
- plugin->session_count = 0;
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
- plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
- plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
-
- plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper,
- plugin);
-
- plugin->data_tokenizer = GNUNET_SERVER_mst_create(&process_data, plugin);
-
- //plugin->sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
- //plugin->pending_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
+ GNUNET_STATISTICS_set (plugin->env->stats, _("# WLAN sessions allocated"),
+ 0, GNUNET_NO);
+ GNUNET_STATISTICS_set (plugin->env->stats, _("# WLAN MAC endpoints allocated"),
+ 0, 0);
+ GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
+ 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);
+ switch (testmode)
+ {
+ case 0: /* normal */
+ plugin->helper_argv[0] = (char *) "gnunet-helper-transport-wlan";
+ plugin->helper_argv[1] = interface;
+ plugin->helper_argv[2] = NULL;
+ plugin->suid_helper = GNUNET_HELPER_start ("gnunet-helper-transport-wlan",
+ plugin->helper_argv,
+ &handle_helper_message,
+ 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-helper-transport-wlan-dummy",
+ plugin->helper_argv,
+ &handle_helper_message,
+ 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-helper-transport-wlan-dummy",
+ plugin->helper_argv,
+ &handle_helper_message,
+ plugin);
+ break;
+ default:
+ GNUNET_assert (0);
+ }
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->cls = plugin;
api->send = &wlan_plugin_send;
+ api->get_session = &wlan_plugin_get_session;
api->disconnect = &wlan_plugin_disconnect;
api->address_pretty_printer = &wlan_plugin_address_pretty_printer;
api->check_address = &wlan_plugin_address_suggested;
api->address_to_string = &wlan_plugin_address_to_string;
-
- //read config
-
- if (GNUNET_CONFIGURATION_have_value(env->cfg, "transport-wlan", "TESTMODE"))
- {
- if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(env->cfg,
- "transport-wlan", "TESTMODE", &testmode))
- testmode = 0; //default value
- }
-
- if (GNUNET_CONFIGURATION_have_value(env->cfg, "transport-wlan", "INTERFACE"))
- {
- if (GNUNET_CONFIGURATION_get_value_string(env->cfg, "transport-wlan",
- "INTERFACE", &(plugin->interface)) != GNUNET_YES)
- {
- libgnunet_plugin_transport_wlan_done(api);
- return NULL;
- }
- }
-
- //start the plugin
- set_next_beacon_time(plugin);
-
- wlan_transport_start_wlan_helper(plugin, testmode);
-
- start_next_message_id();
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "wlan init finished\n");
-#endif
-
+ api->string_to_address = &wlan_string_to_address;
return api;
}
+
/* end of plugin_transport_wlan.c */
projects / oweals / gnunet.git / blobdiff