/*
- 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) 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.
+ */
/**
* @file transport/plugin_transport_wlan.c
#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
#include "gnunet_crypto_lib.h"
+#include "wlan/ieee80211.h"
+
+#include <string.h>
#define PROTOCOL_PREFIX "wlan"
/**
* Time until retransmission of a fragment in ms
*/
-#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
+#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
#define FRAGMENT_QUEUE_SIZE 10
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1
-#define DEBUG_wlan GNUNET_YES
+#define MESSAGE_IN_TIMEOUT GNUNET_TIME_UNIT_SECONDS
-#define MESSAGE_LENGHT_UNKNOWN -1
-#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
+#define MESSAGES_IN_QUEUE_SIZE 10
+#define MESSAGES_IN_QUEUE_PER_SESSION 1
+
+#define HALLO_BEACON_SCALING_FACTOR 900
+
+#define DEBUG_wlan GNUNET_NO
+#define DEBUG_wlan_retransmission GNUNET_NO
+#define MESSAGE_LENGHT_UNKNOWN -1
+//#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
/**
* After how long do we expire an address that we
};
-
/**
* Encapsulation of all of the state of the plugin.
*/
/**
* Number of sessions
*/
-
- int session_count;
+ unsigned int session_count;
/**
- * encapsulation to the local wlan server prog
+ * encapsulation of data from the local wlan helper program
*/
+ struct GNUNET_SERVER_MessageStreamTokenizer * suid_tokenizer;
- struct GNUNET_SERVER_MessageStreamTokenizer * consoltoken;
-
+ /**
+ * encapsulation of packets received from the wlan helper
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer * data_tokenizer;
+ /**
+ * encapsulation of packets received
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer * fragment_tokenizer;
/**
* stdout pipe handle for the gnunet-wlan-helper process
* Sessions currently pending for transmission
* to this peer, if any.
*/
- struct Sessionqueue * pending_Sessions;
+ struct Sessionqueue * pending_Sessions_head;
/**
- * Sessions currently pending for transmission
- * to this peer (tail), if any.
- */
+ * Sessions currently pending for transmission
+ * to this peer (tail), if any.
+ */
struct Sessionqueue * pending_Sessions_tail;
/**
/**
* Messages in the fragmentation queue, head
*/
-
- struct FragmentMessage * pending_Fragment_Messages_head;
+ struct GNUNET_CONTAINER_Heap * pending_Fragment_Messages;
/**
- * Messages in the fragmentation queue, tail
+ * Messages in the in Queue, head
*/
-
- struct FragmentMessage * pending_Fragment_Messages_tail;
+ struct Receive_Message_Queue * receive_messages_head;
/**
- * number of pending fragment message
- */
+ * Messages in the in Queue, tail
+ */
+ struct Receive_Message_Queue * receive_messages_teil;
- unsigned int pending_fragment_messages;
+ /**
+ * number of messages in the in queue
+ */
+ unsigned int pending_receive_messages;
/**
* time of the next "hello-beacon"
*/
-
struct GNUNET_TIME_Absolute beacon_time;
+ /**
+ * queue to send acks for received fragments (head)
+ */
+ struct AckSendQueue * ack_send_queue_head;
+
+ /**
+ * queue to send acks for received fragments (tail)
+ */
+ 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;
+ struct GNUNET_TIME_Absolute next_send;
};
/**
* Queue of sessions, for the general session queue and the pending session queue
*/
-
+//TODO DOXIGEN
struct Sessionqueue
{
- struct Sessionqueue * next;
- struct Sessionqueue * prev;
- struct Session * content;
+ struct Sessionqueue * next;
+ struct Sessionqueue * prev;
+ struct Session * content;
};
/**
- * Queue of ack received for messages send
+ * Queue for the fragments received
*/
-
-struct AckQueue
+//TODO DOXIGEN
+struct Receive_Fragment_Queue
{
- struct AckQueue * next;
- struct AckQueue * prev;
- int fragment_num; //TODO change it to offset if better
+ struct Receive_Fragment_Queue * next;
+ struct Receive_Fragment_Queue * prev;
+ uint16_t num;
+ const char * msg;
+ uint16_t size;
+ struct Radiotap_rx rxinfo;
};
+//TODO DOXIGEN
+struct Session_id_fragment_triple
+{
+ struct Session * session;
+ uint32_t message_id;
+ struct FragmentMessage * fm;
+};
+//TODO DOXIGEN
+struct Plugin_Session_pair
+{
+ struct Plugin * plugin;
+ struct Session * session;
+};
/**
* Queue for the fragments received
*/
-
-struct RecQueue
+struct Receive_Message_Queue
{
- struct RecQueue * next;
- struct RecQueue * prev;
- uint16_t num;
- const char * msg;
- uint16_t size;
+ 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
+ */
+
+ struct Receive_Fragment_Queue * frag_head;
+
+ /**
+ * Sorted queue with the fragments received; tail
+ */
+
+ struct Receive_Fragment_Queue * frag_tail;
+
+ /**
+ * Session this fragment belongs to
+ */
+
+ struct Session * session;
+
+ /**
+ * Timeout value for the pending message.
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+ /**
+ * Bitfield of received fragments
+ */
+
+ uint64_t received_fragments;
};
/**
*/
char *msg;
+ /**
+ * Size of the message
+ */
+ size_t message_size;
+
/**
* Continuation function to call once the message
* has been sent. Can be NULL if there is no
*/
struct GNUNET_TIME_Absolute timeout;
+};
+
+/**
+ * Queue for acks to send for fragments recived
+ */
+struct AckSendQueue
+{
+
/**
- * Size of the message
+ * next ack in the ack send queue
*/
- size_t message_size;
+ struct AckSendQueue * next;
+ /**
+ * previous ack in the ack send queue
+ */
+ struct AckSendQueue * prev;
+ /**
+ * pointer to the session this ack belongs to
+ */
+ struct Session * session;
+ /**
+ * ID of message, to distinguish between the messages, picked randomly.
+ */
+ uint32_t message_id;
+
+ /**
+ * Bit field for received fragments
+ */
+ uint64_t fragments_field;
};
/**
* peer mac address
*/
- uint8_t addr[6];
+ struct MacAddress addr;
};
/**
struct PendingMessage *pending_message;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * encapsulation of the receive data
- */
- //struct GNUNET_SERVER_MessageStreamTokenizer * receive_token;
-
- /**
- * offset of the next fragment for the receive_token, -1 means last message finished
- */
-
- //int rec_offset;
-
- /**
- * 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
+ * Message currently pending for transmission
+ * to this peer, if any.
*/
-
- struct RecQueue * frag_head;
+ struct PendingMessage *pending_message2;
/**
- * Sorted queue with the fragments received; tail
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
*/
-
- struct RecQueue * frag_tail;
+ struct GNUNET_PeerIdentity target;
/**
* peer mac address
*/
- char addr[6];
+ struct MacAddress addr;
/**
* Address of the other peer (either based on our 'connect'
struct GNUNET_TIME_Absolute last_activity;
/**
- * current number for message incoming, to distinguish between the messages
+ * count of messages in the fragment out queue for this session
*/
- uint32_t message_id_in;
- /**
- * current number for message outgoing, to distinguish between the messages
- */
- uint32_t message_id_out;
+ int fragment_messages_out_count;
/**
- * does this session have a message in the fragment queue
+ * count of messages in the fragment in queue for this session
*/
- int has_fragment;
-
-};
+ int fragment_messages_in_count;
+ //TODO DOXIGEN
+ uint8_t rate;
+ uint16_t tx_power;
+ uint8_t antenna;
+};
+/**
+ * Struct for Messages in the fragment queue
+ */
struct FragmentMessage
{
- /**
- * Session this message belongs to
- */
-
- struct Session *session;
-
- /**
- * This is a doubly-linked list.
- */
- struct FragmentMessage *next;
-
- /**
- * This is a doubly-linked list.
- */
- struct FragmentMessage *prev;
-
- /**
- * The pending message
- */
- char *msg;
-
- /**
- * Timeout value for the pending message.
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Timeout value for the pending fragments.
- * Stores the time when the next msg fragment ack has to be received
- */
- struct GNUNET_TIME_Absolute next_ack;
+ /**
+ * heap pointer of this message
+ */
+ struct GNUNET_CONTAINER_HeapNode * node;
- /**
- * Sorted queue with the acks received for fragments; head
- */
+ /**
+ * Session this message belongs to
+ */
- struct AckQueue * head;
+ struct Session *session;
- /**
- * Sorted queue with the acks received for fragments; tail
- */
+ /**
+ * This is a doubly-linked list.
+ */
+ struct FragmentMessage *next;
- struct AckQueue * tail;
+ /**
+ * This is a doubly-linked list.
+ */
+ struct FragmentMessage *prev;
- /**
- * Size of the message
- */
- size_t message_size;
+ /**
+ * The pending message
+ */
+ char *msg;
- /**
- * pos / next fragment number in the message, for fragmentation/segmentation,
- * some acks can be missing but there is still time
- */
- uint32_t message_pos;
+ /**
+ * 0 if not in ack queue
+ * 1 if in ack queue
+ */
-};
+ char in_ack_queue;
-/**
- * Header for messages which need fragmentation
- */
-struct WlanHeader
-{
+ /**
+ * Timeout value for the pending message.
+ */
+ struct GNUNET_TIME_Absolute timeout;
- struct GNUNET_MessageHeader header;
+ /**
+ * Timeout value for the pending fragments.
+ * Stores the time when the next msg fragment ack has to be received
+ */
+ struct GNUNET_TIME_Absolute next_ack;
/**
- * checksum/error correction
+ * bitfield with all acks received for this message
*/
- uint32_t crc GNUNET_PACKED;
+ uint64_t ack_bitfield;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * Size of the message
*/
- struct GNUNET_PeerIdentity target;
+ size_t message_size;
- // followed by payload
+ /**
+ * pos / next fragment number in the message, for fragmentation/segmentation,
+ * some acks can be missing but there is still time
+ */
+ uint32_t message_pos;
+ /**
+ * current number for message outgoing, to distinguish between the messages
+ */
+ uint32_t message_id_out;
};
/**
* Header for messages which need fragmentation
*/
-struct FragmentationHeader
+struct FragmentationAckHeader
{
struct GNUNET_MessageHeader header;
- /**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
- */
- // struct GNUNET_PeerIdentity target GNUNET_PACKED;
-
/**
* ID of message, to distinguish between the messages, picked randomly.
*/
/**
* Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
*/
- uint16_t fragment_off_or_num GNUNET_PACKED;
-
- /**
- * CRC of fragment (for error checking)
- */
- uint16_t message_crc GNUNET_PACKED;
-
- /**
- * Flags
- * // 0x1 ack => Use two different message types in header.type! (FRAG_MESSAGE; FRAG_ACK)
- * // 0x2 has data (not only ack)
- * // 0x4 last fragment of message
- * // 0x8 new message
- */
- // uint32_t flags GNUNET_PACKED;
-
- /**
- * checksum/error correction
- */
- // uint32_t crc GNUNET_PACKED;
-
- // followed by payload unless ACK
+ uint64_t fragment_field GNUNET_PACKED;
};
-//enum { ACK_FRAGMENT = 1, DATA_FRAGMENT = 2, LAST_FRAGMENT = 4, NEW_MESSAGE = 8 };
-
-int
-getRadiotapHeader(struct RadiotapHeader * Header);
-
-int
-getWlanHeader(struct IeeeHeader * Header);
-
-static int
-wlan_plugin_address_suggested(void *cls, const void *addr, size_t addrlen);
-
-uint16_t
-getcrc16(const char *msgbuf, size_t msgbuf_size);
-
static void
do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+/**
+ * Sets a bit active in the bitArray. Increment bit-specific
+ * usage counter on disk only if below 4bit max (==15).
+ *
+ * @param bitArray memory area to set the bit in
+ * @param bitIdx which bit to set
+ */
static void
-check_fragment_queue(struct Plugin * plugin);
-
-uint32_t
-getcrc32(const char *msgbuf, size_t msgbuf_size);
-
-static void
-free_rec_frag_queue(struct Session * session);
+setBit(char *bitArray, unsigned int bitIdx)
+{
+ size_t arraySlot;
+ unsigned int targetBit;
-static void
-wlan_data_helper(void *cls, void * client, const struct GNUNET_MessageHeader * hdr);
+ arraySlot = bitIdx / 8;
+ targetBit = (1L << (bitIdx % 8));
+ bitArray[arraySlot] |= targetBit;
+}
-static void
-wlan_process_helper (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr);
+/**
+ * Checks if a bit is active in the bitArray
+ *
+ * @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.
+ */
+static int
+testBit(char *bitArray, unsigned int bitIdx)
+{
+ size_t slot;
+ unsigned int targetBit;
-static void
-finish_sending(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+ slot = bitIdx / 8;
+ targetBit = (1L << (bitIdx % 8));
+ if (bitArray[slot] & targetBit)
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
/**
* get the next message number, at the moment just a random one
* @return returns the next valid message-number for sending packets
*/
-uint32_t
+static uint32_t
get_next_message_id()
{
return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
}
-/**
- * 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
*
* @param addr pointer to the mac address of the peer
* @return returns the session
*/
-
static struct Session *
-search_session(struct Plugin *plugin, const uint8_t * addr)
+search_session(struct Plugin *plugin, const struct MacAddress *addr)
{
struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * lastitem = NULL;
- //just look at all the session for the needed one
while (queue != NULL)
{
- // 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;
+ if (memcmp(addr, &queue->content->addr, sizeof(struct MacAddress)) == 0)
+ return queue->content; /* session found */
queue = queue->next;
}
return NULL;
}
/**
- * create a new session
+ * 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 plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
- * @return returns the session
+ * @param cls closure
+ * @param addr binary address
+ * @param addrlen length of the address
+ * @return string representing the same address
*/
-
-static struct Session *
-create_session(struct Plugin *plugin,const uint8_t * addr)
+static const char*
+wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen)
{
- struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+ static char ret[40];
+ const struct MacAddress *mac;
- GNUNET_CONTAINER_DLL_insert_tail(plugin->sessions, plugin->sessions_tail, queue);
+ 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;
+}
+
+/**
+ * create a new session
+ *
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the mac address of the peer
+ * @return returns the session
+ */
+
+static struct Session *
+create_session(struct Plugin *plugin, const struct MacAddress * addr)
+{
+ struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->sessions, plugin->sessions_tail, queue);
queue->content = GNUNET_malloc (sizeof (struct Session));
queue->content->plugin = plugin;
- memcpy(queue->content->addr, addr, 6);
- queue->content->message_id_out = get_next_message_id();
- queue->content->has_fragment = 0;
- queue->content->rec_size = NO_MESSAGE_OR_MESSAGE_FINISHED;
+ queue->content->addr = *addr;
+ queue->content->fragment_messages_out_count = 0;
+ queue->content->fragment_messages_in_count = 0;
plugin->session_count++;
+
+#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;
}
/**
- * get Session from address, create if no session exists
+ * Get session from address, create if no session exists
*
* @param plugin pointer to the plugin struct
* @param addr pointer to the mac address of the peer
* @return returns the session
*/
-//TODO add other possibilities to find the right session (are there other?)
static struct Session *
-get_Session(struct Plugin *plugin, const uint8_t * addr)
+get_session(struct Plugin *plugin, const struct MacAddress *addr)
{
struct Session * session = search_session(plugin, addr);
if (session != NULL)
- {
- return session;
- }
- // new session
+ return 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);
- */
}
/**
* Queue the session to send data
+ * checks if there is a message pending
+ * checks if this session is not allready in the queue
+ * @param plugin pointer to the plugin
+ * @param session pointer to the session to add
*/
-//TODO doxigen
static void
-queue_Session (struct Plugin *plugin,
- struct Session * session)
-{
- struct Sessionqueue * queue = plugin->pending_Sessions;
- struct Sessionqueue * lastitem = NULL;
-
- 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;
- }
-
- // Session is not in the queue
-
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
- queue->content = session;
-
- //insert at the tail
- GNUNET_CONTAINER_DLL_insert_after (plugin->pending_Sessions,
- plugin->pending_Sessions_tail,
- plugin->pending_Sessions_tail, queue);
- plugin->pendingsessions ++;
+queue_session(struct Plugin *plugin, struct Session * session)
+{
+ struct Sessionqueue * queue = plugin->pending_Sessions_head;
-}
+ if (session->pending_message != NULL)
+ {
+ while (queue != NULL)
+ {
+ // content is never NULL
+ GNUNET_assert (queue->content != NULL);
+ // is session already in queue?
+ if (session == queue->content)
+ {
+ return;
+ }
+ // try next
+ queue = queue->next;
+ }
+
+ // Session is not in the queue
+
+ queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+ queue->content = session;
+
+ //insert at the tail
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail, queue);
+ plugin->pendingsessions++;
+ }
-//TODO doxigen
-static void
-free_acks (struct FragmentMessage * fm){
- struct AckQueue * fq;
- while (fm->head != NULL){
- fq = fm->head;
- GNUNET_CONTAINER_DLL_remove(fm->head, fm->tail, fq);
- GNUNET_free(fq);
- }
- //needed?
- fm->head = NULL;
- fm->tail = NULL;
}
-//TODO doxigen
/**
* Function to schedule the write task, executed after a delay
+ * @param cls pointer to the plugin struct
+ * @param tc GNUNET_SCHEDULER_TaskContext pointer
*/
static void
delay_fragment_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
struct Plugin * plugin = cls;
plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
// GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
}
}
-//TODO doxigen
/**
* Function to calculate the time of the next periodic "hello-beacon"
+ * @param plugin pointer to the plugin struct
*/
+
static void
set_next_beacon_time(struct Plugin * const plugin)
{
if (plugin->session_count < 10)
{
plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_SECONDS);
+ 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));
+ 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_UNIT_MINUTES);
+ GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(
+ GNUNET_TIME_UNIT_MINUTES, HALLO_BEACON_SCALING_FACTOR));
}
}
-
-//TODO doxigen
-struct GNUNET_TIME_Relative
-get_next_frag_timeout(struct FragmentMessage * fm)
-{
- return GNUNET_TIME_relative_min(GNUNET_TIME_absolute_get_remaining(
- fm->next_ack), GNUNET_TIME_absolute_get_remaining(fm->timeout));
-}
-
-//TODO doxigen
/**
* Function to get the timeout value for acks for this session
+ * @param fm pointer to the FragmentMessage to get the next timeout
+ * @return time until the next ack should be received, in GNUNET_TIME_Relative
*/
-
-struct GNUNET_TIME_Relative
-get_ack_timeout (struct FragmentMessage * fm){
- return FRAGMENT_TIMEOUT;
+static struct GNUNET_TIME_Relative
+get_ack_timeout(struct FragmentMessage * fm)
+{
+ return FRAGMENT_TIMEOUT;
}
-
/**
* Function to set the timer for the next timeout of the fragment queue
* @param plugin the handle to the plugin struct
*/
+
static void
-check_next_fragment_timeout(struct Plugin * const plugin)
+set_next_send(struct Plugin * const plugin)
{
struct FragmentMessage * fm;
struct GNUNET_TIME_Relative next_send;
-
- next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
+ struct GNUNET_TIME_Absolute next_send_tmp;
//cancel old task
if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
}
- fm = plugin->pending_Fragment_Messages_head;
- GNUNET_assert(plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK);
+ fm = GNUNET_CONTAINER_heap_peek(plugin->pending_Fragment_Messages);
+
+ //check if some acks are in the queue
+ if (plugin->ack_send_queue_head != NULL)
+ {
+ next_send = GNUNET_TIME_UNIT_ZERO;
+ }
//check if there are some fragments in the queue
- if (fm != NULL)
+ else
{
- next_send
- = GNUNET_TIME_relative_min(next_send, get_next_frag_timeout(fm));
+ next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
+ if (fm != NULL)
+ {
+ next_send_tmp.abs_value = GNUNET_CONTAINER_heap_node_get_cost(
+ fm->node);
+ next_send = GNUNET_TIME_relative_min(next_send,
+ GNUNET_TIME_absolute_get_remaining(next_send_tmp));
+
+ }
}
- plugin->server_write_delay_task = GNUNET_SCHEDULER_add_delayed(next_send,
- &delay_fragment_task, plugin);
-}
+#if DEBUG_wlan
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Next packet is send in: %u\n",
+ next_send.rel_value);
+#endif
+
+ if (next_send.rel_value == GNUNET_TIME_UNIT_ZERO.rel_value)
+ {
+ 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);
+ }
+ }
+ else
+ {
+ plugin->server_write_delay_task
+ = GNUNET_SCHEDULER_add_delayed(next_send,
+ &delay_fragment_task, plugin);
+ }
+}
-//TODO doxigen
/**
* Function to get the next queued Session, removes the session from the queue
+ * @param plugin pointer to the plugin struct
+ * @return pointer to the session found, returns NULL if there is now session in the queue
*/
-
static struct Session *
-get_next_queue_Session (struct Plugin * plugin){
- struct Session * session;
- struct Sessionqueue * sessionqueue;
- struct Sessionqueue * sessionqueue_alt;
- struct PendingMessage * pm;
- sessionqueue = plugin->pending_Sessions;
- while (sessionqueue != NULL){
- session = sessionqueue->content;
- pm = session->pending_message;
-
- //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->has_fragment){
- 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 = 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);
-
- 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);
-
- }
-
-
- }
- return NULL;
-}
+get_next_queue_session(struct Plugin * plugin)
+{
+ struct Session * session;
+ struct Sessionqueue * sessionqueue;
+ struct Sessionqueue * sessionqueue_alt;
+ struct PendingMessage * pm;
+ sessionqueue = plugin->pending_Sessions_head;
+ while (sessionqueue != NULL)
+ {
+ session = sessionqueue->content;
-/**
- * Function to sort the message into the message fragment queue
- * @param plugin the plugin struct
- * @param fm message to sort into the queue
- */
-static void
-sort_fragment_into_queue (struct Plugin * plugin, struct FragmentMessage * fm){
- 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){
- break;
- } else {
- fm2 = fm2->next;
- }
- }
-
- GNUNET_CONTAINER_DLL_insert_after(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail,fm2,fm);
+ GNUNET_assert(session != NULL);
+ pm = session->pending_message;
+
+
+#if DEBUG_wlan
+ if (pm == NULL)
+ {
+ 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_head,
+ 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_head,
+ plugin->pending_Sessions_tail, sessionqueue_alt);
+
+ GNUNET_free(sessionqueue_alt);
+ }
+
+ }
+
+ }
+ return NULL;
}
/**
* @param fm message to free
*/
static void
-free_fragment_message(struct Plugin * plugin,struct FragmentMessage * fm)
+free_fragment_message(struct Plugin * plugin, struct FragmentMessage * fm)
{
+ struct Session * session = fm->session;
+
if (fm != NULL)
{
- free_acks(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_CONTAINER_heap_remove_node(fm->node);
GNUNET_free(fm);
- plugin->pending_fragment_messages --;
- check_fragment_queue(plugin);
+
+ queue_session(plugin, session);
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "free pending fragment messages, pending messages remaining %u\n",
+ GNUNET_CONTAINER_heap_get_size(plugin->pending_Fragment_Messages));
+#endif
}
}
*/
static void
-check_fragment_queue (struct Plugin * plugin){
- struct Session * session;
- struct FragmentMessage * fm;
-
- 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->has_fragment = 1;
- 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();
-
- if (pm->transmit_cont != NULL)
- pm->transmit_cont (pm->transmit_cont_cls,
- &(session->target), GNUNET_OK);
- GNUNET_free(pm);
-
- sort_fragment_into_queue(plugin,fm);
- plugin->pending_fragment_messages ++;
-
- //generate new message id
- session->message_id_out = get_next_message_id();
-
- //check if timeout changed
- check_next_fragment_timeout(plugin);
- }
- }
+check_fragment_queue(struct Plugin * plugin)
+{
+ struct Session * session;
+ struct FragmentMessage * fm;
+ struct GNUNET_PeerIdentity pid;
+
+ struct PendingMessage * pm;
+
+ if (GNUNET_CONTAINER_heap_get_size(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;
+ fm->node = GNUNET_CONTAINER_heap_insert(
+ plugin->pending_Fragment_Messages, fm,
+ GNUNET_TIME_absolute_get().abs_value);
+
+ GNUNET_assert(session !=NULL);
+
+ 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
+ set_next_send(plugin);
}
/**
* @param fm the message to check
*/
static void
-check_finished_fragment(struct Plugin * plugin, struct FragmentMessage * fm){
- struct AckQueue * ack;
- int counter = 0;
+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->message_size >= (WLAN_MTU - sizeof(struct FragmentationHeader))
- * fm->tail->fragment_num)
+ if (fm->ack_bitfield == tmpfield)
{
- ack = fm->head;
- counter = 0;
- //check if all acks are present
- while (ack != NULL)
- {
- if (counter == ack->fragment_num)
- {
- counter ++;
- ack = ack->next;
- } else {
- //ack is missing
- return;
- }
- }
- fm->session->has_fragment = 0;
+
+#if DEBUG_wlan_retransmission
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Finished sending and got all acks; message_id %u\n",
+ fm->message_id_out);
+#endif
+
free_fragment_message(plugin, fm);
+ check_fragment_queue(plugin);
}
}
/**
- * Function called when wlan helper is ready to get some data
- *
- * @param cls closure
- * @param tc GNUNET_SCHEDULER_TaskContext
+ * Function to set the next fragment number
+ * @param fm use this FragmentMessage
*/
static void
-do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+set_next_message_fragment_pos(struct Plugin * plugin,
+ struct FragmentMessage * fm)
{
- struct Plugin * plugin = cls;
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+ fm->message_pos++;
- ssize_t bytes;
+ //check if retransmit is needed
+ if (GNUNET_TIME_absolute_get_remaining(fm->next_ack).rel_value == 0)
+ {
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
+ // be positive and try again later :-D
+ fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(fm));
+ // find first missing fragment
- struct Session * session = NULL;
- struct FragmentMessage * fm = NULL;
- struct IeeeHeader * ieeewlanheader = NULL;
- struct RadiotapHeader * radioHeader = NULL;
- struct GNUNET_MessageHeader * msgheader = NULL;
+ fm->message_pos = 0;
- struct FragmentationHeader fragheader;
- struct FragmentationHeader * fragheaderptr = NULL;
- struct Finish_send * finish = NULL;
- uint16_t size = 0;
- const char * copystart = NULL;
- uint16_t copysize = 0;
- uint copyoffset = 0;
- struct AckQueue * akt = NULL;
+ GNUNET_CONTAINER_heap_update_cost(plugin->pending_Fragment_Messages,
+ fm->node, 0);
-#if 1
- struct GNUNET_MessageHeader * msgheader2 = NULL;
+#if DEBUG_wlan_retransmission
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Retransmit; message_id %u; fragment number %i, size: %u\n",
+ fm->message_id_out, fm->message_pos, fm->message_size);
+#endif
+ }
- //test if a "hello-beacon" has to be send
- if (GNUNET_TIME_absolute_get_remaining(plugin->beacon_time).rel_value == 0)
+ //test if ack 0 (or X) was already received
+ while (testBit((char*) &fm->ack_bitfield, fm->message_pos) == GNUNET_YES)
{
- //check if the message is not to big
- GNUNET_assert(sizeof(struct WlanHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello)) <= WLAN_MTU);
- size = sizeof(struct GNUNET_MessageHeader)
- + sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
- + sizeof(struct GNUNET_MessageHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello));
+ fm->message_pos++;
+ }
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
+}
- radioHeader = (struct RadiotapHeader *) &msgheader[1];
- getRadiotapHeader(radioHeader);
+//TODO DOXIGEN
+static int
+getRadiotapHeader(struct Plugin * plugin, struct Session * session,
+ struct Radiotap_Send * header)
+{
- ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(ieeewlanheader);
+ 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;
+ }
- 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);
+ return GNUNET_YES;
+}
- memcpy(&msgheader2[1], *plugin->env->our_hello, GNUNET_HELLO_size(
- *(plugin->env->our_hello)));
+/**
+ * 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
+ */
+static int
+getWlanHeader(struct ieee80211_frame * Header,
+ const struct MacAddress * to_mac_addr, struct Plugin * plugin,
+ unsigned int size)
+{
+ uint16_t * tmp16;
+ const int rate = 11000000;
- 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));
+ Header->i_fc[0] = 0x08;
+ Header->i_fc[1] = 0x00;
+ 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(struct MacAddress));
- }
- GNUNET_assert(bytes != GNUNET_SYSERR);
- GNUNET_assert(bytes == size);
+ tmp16 = (uint16_t*) Header->i_dur;
+ *tmp16 = (uint16_t) htole16((size * 1000000) / rate + 290);
- GNUNET_free(msgheader);
+ return GNUNET_YES;
+}
- set_next_beacon_time(plugin);
- check_next_fragment_timeout(plugin);
+/**
+ * 32bit CRC
+ *
+ * @param msgbuf pointer tor the data
+ * @param msgbuf_size size of the data
+ *
+ * @return 32bit crc value
+ */
- return;
+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
+ */
-#endif
+uint16_t
+getcrc16(const char *msgbuf, size_t msgbuf_size)
+{
+ //TODO calc some crc
+ return 0;
+}
- fm = plugin->pending_Fragment_Messages_head;
- GNUNET_assert(fm != NULL);
- session = fm->session;
- GNUNET_assert(session != NULL);
+//TODO DOXIGEN
+static void
+send_hello_beacon(struct Plugin * plugin)
+{
- // test if message timed out
- if (GNUNET_TIME_absolute_get_remaining(fm->timeout).rel_value == 0)
- {
- free_acks(fm);
- GNUNET_assert(plugin->pending_fragment_messages > 0);
- plugin->pending_fragment_messages--;
- GNUNET_CONTAINER_DLL_remove(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending hello beacon\n");
+#endif
- GNUNET_free(fm->msg);
+ uint16_t size;
+ ssize_t bytes;
+ uint16_t hallo_size;
+ struct GNUNET_MessageHeader * msgheader;
+ struct ieee80211_frame * ieeewlanheader;
+ struct Radiotap_Send * radioHeader;
+ struct GNUNET_MessageHeader * msgheader2;
- GNUNET_free(fm);
- check_fragment_queue(plugin);
- }
- else
- {
+ hallo_size = GNUNET_HELLO_size(*(plugin->env->our_hello));
+ GNUNET_assert(sizeof(struct WlanHeader) + hallo_size <= WLAN_MTU);
+ size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
+ + sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader)
+ + hallo_size;
- if (fm->message_size > WLAN_MTU)
- {
- size += sizeof(struct FragmentationHeader);
- // check/set for retransmission
- if (GNUNET_TIME_absolute_get_duration(fm->next_ack).rel_value == 0)
- {
+ msgheader = GNUNET_malloc(size);
+ msgheader->size = htons(size);
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
- // be positive and try again later :-D
- fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(
- fm));
- // find first missing fragment
- akt = fm->head;
- fm->message_pos = 0;
+ radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ getRadiotapHeader(plugin, NULL, radioHeader);
+ ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
+ getWlanHeader(ieeewlanheader, &bc_all_mac, plugin, size);
- //test if ack 0 was already received
- while (akt != NULL)
- {
- //if fragment is present, take next
- if (akt->fragment_num == fm->message_pos)
- {
- fm->message_pos++;
- }
- //next ack is bigger then the fragment number
- //in case there is something like this: (acks) 1, 2, 5, 6, ...
- //and we send 3 again, the next number should be 4
- else if (akt->fragment_num > fm->message_pos)
- {
- break;
- }
+ msgheader2 = (struct GNUNET_MessageHeader*) &ieeewlanheader[1];
+ msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello))
+ + sizeof(struct GNUNET_MessageHeader));
- akt = akt->next;
+ msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
+ memcpy(&msgheader2[1], *plugin->env->our_hello, hallo_size);
- }
+ 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));
- copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader))
- * fm->message_pos;
- fragheader.fragment_off_or_num = htons(fm->message_pos);
- fragheader.message_id = htonl(session->message_id_out);
+ }
+ GNUNET_assert(bytes != GNUNET_SYSERR);
+ GNUNET_assert(bytes == size);
+ GNUNET_free(msgheader);
- // start should be smaller then the packet size
- GNUNET_assert(copyoffset < fm->message_size);
- copystart = fm->msg + copyoffset;
+ set_next_beacon_time(plugin);
+ set_next_send(plugin);
+}
- //size of the fragment is either the MTU - overhead
- //or the missing part of the message in case this is the last fragment
- copysize = GNUNET_MIN(fm->message_size - copyoffset,
- WLAN_MTU - sizeof(struct FragmentationHeader));
- fragheader.header.size = htons(copysize
- + sizeof(struct FragmentationHeader));
- fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
-
- //get the next missing fragment
- akt = fm->head;
- fm->message_pos++;
-
- //test if ack was already received
- while (akt != NULL)
- {
- //if fragment is present, take next
- if (akt->fragment_num == fm->message_pos)
- {
- fm->message_pos++;
- }
- //next ack is bigger then the fragment number
- //in case there is something like this: (acks) 1, 2, 5, 6, ...
- //and we send 3 again, the next number should be 4
- else if (akt->fragment_num > fm->message_pos)
- {
- break;
- }
-
- akt = akt->next;
- }
- }
- else
- {
- // there is no need to split
- copystart = fm->msg;
- copysize = fm->message_size;
- }
-
- size += copysize;
- size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
- + sizeof(struct GNUNET_MessageHeader);
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
-
- ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(ieeewlanheader);
-
- //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;
+//TODO DOXIGEN
+static void
+send_ack(struct Plugin * plugin, struct AckSendQueue * ack)
+{
- GNUNET_assert(plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK);
+ uint16_t size;
+ ssize_t bytes;
+ struct GNUNET_MessageHeader * msgheader;
+ struct ieee80211_frame * ieeewlanheader;
+ struct Radiotap_Send * radioHeader;
+ struct FragmentationAckHeader * msgheader2;
- plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
- &finish_sending, finish);
+ GNUNET_assert(sizeof(struct FragmentationAckHeader) <= WLAN_MTU);
- }
- else
- {
- GNUNET_assert(bytes == size);
+ size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
+ + sizeof(struct ieee80211_frame) + sizeof(struct FragmentationAckHeader);
- GNUNET_free(msgheader);
- check_next_fragment_timeout(plugin);
- }
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Sending ack for message_id %u with fragment field %u, size %u\n",
+ ack->message_id, ack->fragments_field, size
+ - sizeof(struct Radiotap_Send));
+#endif
- //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);
+ msgheader = GNUNET_malloc(size);
+ msgheader->size = htons(size);
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
+ radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ getRadiotapHeader(plugin, ack->session, radioHeader);
+ ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
+ getWlanHeader(ieeewlanheader, &ack->session->addr, plugin, size);
- 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);
+ 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 = GNUNET_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);
+ set_next_send(plugin);
}
-
+//TODO DOXIGEN
static void
-finish_sending(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+finish_sending(void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Finish_send * finish;
+ struct Finish_send * finish = cls;
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);
+ if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
+ {
+ GNUNET_free (finish->msgstart);
+ GNUNET_free (finish);
+ return;
+ }
+ 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->plugin = plugin;
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);
+ 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);
+ set_next_send(plugin);
}
-
}
-int
-getRadiotapHeader(struct RadiotapHeader * Header){
- return GNUNET_YES;
-};
+/**
+ * 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;
-int
-getWlanHeader(struct IeeeHeader * Header){
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
- return GNUNET_YES;
-}
+ struct Session * session;
+ struct FragmentMessage * fm;
+ struct ieee80211_frame * ieeewlanheader;
+ struct Radiotap_Send * radioHeader;
+ struct GNUNET_MessageHeader * msgheader;
+ struct FragmentationHeader fragheader;
+ struct FragmentationHeader * fragheaderptr;
+ struct Finish_send * finish;
+ struct AckSendQueue * ack;
+ uint16_t size;
+ ssize_t bytes;
+ const char * copystart;
+ uint16_t copysize;
+ uint copyoffset;
+ struct GNUNET_TIME_Absolute next_send;
+ 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;
+ }
-/**
- * 32bit CRC
- *
- * @param msgbuf pointer tor the data
- * @param msgbuf_size size of the data
- *
- * @return 32bit crc value
- */
+ //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;
+ }
-uint32_t
-getcrc32 (const char *msgbuf,
- size_t msgbuf_size){
- //TODO calc some crc
- return 0;
+ fm = GNUNET_CONTAINER_heap_peek(plugin->pending_Fragment_Messages);
+
+ 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
+
+ free_fragment_message(plugin, fm);
+ check_fragment_queue(plugin);
+
+ }
+ else
+ {
+
+ //if (fm->message_size > WLAN_MTU)
+ // {
+ size = sizeof(struct FragmentationHeader);
+
+ set_next_message_fragment_pos(plugin, fm);
+
+ copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader))
+ * fm->message_pos;
+
+ 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 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
+
+ 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);
+
+ fragheader.header.size = htons(copysize
+ + sizeof(struct FragmentationHeader));
+ fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
+
+ 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, size);
+
+ //could be faster if content is just send and not copyed before
+ //fragmentheader is needed
+ fragheader.message_crc = htons(getcrc16(copystart, copysize));
+ memcpy(&ieeewlanheader[1], &fragheader,
+ sizeof(struct FragmentationHeader));
+ fragheaderptr = (struct FragmentationHeader *) &ieeewlanheader[1];
+ memcpy(&fragheaderptr[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);
+
+ //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_heap_update_cost(
+ plugin->pending_Fragment_Messages, fm->node, MIN(
+ fm->timeout.abs_value, fm->next_ack.abs_value));
+ // if fragments have opimized timeouts
+ //sort_fragment_into_queue(plugin,fm);
+
+
+#if DEBUG_wlan_retransmission
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "Finished sending all fragments waiting for acks; message_id %u; message_id %u; fragment number %i, size: %u, time until timeout %u\n",
+ fm->message_id_out, fm->message_id_out, fm->message_pos,
+ fm->message_size, GNUNET_TIME_absolute_get_remaining(
+ fm->timeout));
+#endif
+ }
+ else
+ {
+ GNUNET_CONTAINER_heap_update_cost(
+ plugin->pending_Fragment_Messages, fm->node,
+ GNUNET_TIME_absolute_get().abs_value);
+ }
+
+ 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;
+ finish ->next_send = next_send;
+
+ 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_free(msgheader);
+ set_next_send(plugin);
+ }
+
+ }
+ return;
+ }
+
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
+ "do_transmit did nothing, should not happen!\n");
}
/**
- * 16bit CRC
- *
- * @param msgbuf pointer tor the data
- * @param msgbuf_size size of the data
+ * 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.
*
- * @return 16bit crc value
+ * @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;
-uint16_t
-getcrc16 (const char *msgbuf,
- size_t msgbuf_size){
- //TODO calc some crc
- return 0;
+ /* 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;
}
/**
* @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 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))
* 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)
+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;
+ struct PendingMessage * newmsg;
+ struct WlanHeader * wlanheader;
+
//check if msglen > 0
GNUNET_assert(msgbuf_size > 0);
{
if (wlan_plugin_address_suggested(plugin, addr, addrlen) == GNUNET_OK)
{
- session = get_Session(plugin, addr);
+ session = get_session(plugin, addr);
}
else
{
}
//TODO target "problem" not solved
+ //if (session->target != NULL){
+ // GNUNET_assert(session->target == *target);
+ //} else {
session->target = *target;
+ //}
+
//queue message:
- //first queue session
- queue_Session(plugin, session);
//queue message in session
//test if there is no other message in the "queue"
- GNUNET_assert (session->pending_message == NULL);
+ //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));
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);
- session->pending_message = newmsg;
+ 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
}
-//TODO doxigen
-static struct FragmentMessage *
-get_fragment_message_from_session(struct Session * session)
+/**
+ * Iterate over the fragment messages of the given session.
+ *
+ * @param cls argument to give to iterator
+ * @param node node to iterate over
+ * @param element value stored at the node
+ * @param cost cost associated with the node
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
+ */
+static int
+free_fragment_message_from_session(void *cls,
+ struct GNUNET_CONTAINER_HeapNode *node, void *element,
+ GNUNET_CONTAINER_HeapCostType cost)
{
- struct FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
- while (fm != NULL)
+ struct Plugin_Session_pair * pair = (struct Plugin_Session_pair *) cls;
+ struct FragmentMessage * fm = (struct FragmentMessage*) element;
+
+ if (fm->session == pair->session)
{
- if (fm->session == session)
- {
- return fm;
- }
- fm = fm->next;
+
+ free_fragment_message(pair->plugin, fm);
}
- return NULL;
+ return GNUNET_YES;
+
}
/**
- * Function that can be used to force the plugin to disconnect
- * from the given peer and cancel all previous transmissions
- * (and their continuation).
+ * Search for fragment message with given id and session
*
- * @param cls closure
- * @param target peer from which to disconnect
+ * @param cls argument to give to iterator
+ * @param node node to iterate over
+ * @param element value stored at the node
+ * @param cost cost associated with the node
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
*/
-static void
-wlan_plugin_disconnect(void *cls, const struct GNUNET_PeerIdentity *target)
+static int
+search_fragment_message_from_session_and_id(void *cls,
+ struct GNUNET_CONTAINER_HeapNode *node, void *element,
+ GNUNET_CONTAINER_HeapCostType cost)
{
- struct Plugin *plugin = cls;
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * pendingsession = plugin->pending_Sessions;
- struct PendingMessage * pm = NULL;
- struct FragmentMessage * fm;
+ struct Session_id_fragment_triple * triple =
+ (struct Session_id_fragment_triple *) cls;
+ struct FragmentMessage * fm = (struct FragmentMessage*) element;
- // just look at all the session for the needed one
- while (queue != NULL)
+ if ((fm->session == triple->session) && (fm->message_id_out
+ == triple->message_id))
{
- // 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);
- free_fragment_message(plugin,fm);
+ triple->fm = fm;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
- //dispose all received fragments
- free_rec_frag_queue(queue->content);
+}
- // remove PendingMessage
- pm = queue->content->pending_message;
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
+/**
+ * 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 Plugin * plugin,
+ struct Session * session, uint32_t message_id)
+{
+ struct Session_id_fragment_triple triple;
+ triple.session = session;
+ triple.message_id = message_id;
+ GNUNET_CONTAINER_heap_iterate(plugin->pending_Fragment_Messages,
+ &search_fragment_message_from_session_and_id, &triple);
+ return triple.fm;
+}
+
+/**
+ * function to get the receive message of a session
+ * @param plugin pointer to the plugin struct
+ * @param session session this fragment belongs to
+ */
+static 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 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 * rx_message)
+{
+ GNUNET_assert(rx_message !=NULL);
+ struct Receive_Fragment_Queue * rec_queue = rx_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_free(queue->content);
- GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
- GNUNET_free(queue);
- plugin->session_count --;
+ GNUNET_CONTAINER_DLL_remove(plugin->receive_messages_head,plugin->receive_messages_teil, rx_message);
+
+ GNUNET_assert(plugin->pending_receive_messages > 0);
+ GNUNET_assert(rx_message->session->fragment_messages_in_count > 0);
+
+ plugin->pending_receive_messages--;
+ rx_message->session->fragment_messages_in_count--;
+ GNUNET_free(rx_message);
+}
+
+/**
+ * function to get the receive message of a session
+ * @param plugin pointer to the plugin struct
+ * @param session session this fragment belongs to
+ */
+static void
+check_receive_message_timeouts(struct Plugin * plugin, struct Session * session)
+{
+ struct Receive_Message_Queue * rec_message = plugin->receive_messages_head;
+ while (rec_message != NULL)
+ {
+ if (GNUNET_TIME_absolute_get_remaining(rec_message->timeout).rel_value
+ == 0)
+ {
+ free_receive_message(plugin, rec_message);
+ }
+ rec_message = rec_message->next;
+ }
+
+}
+
+//TODO DOXIGEN
+static void
+free_session(struct Plugin * plugin, struct Sessionqueue * queue)
+{
+ struct Sessionqueue * pendingsession;
+ struct Sessionqueue * pendingsession_tmp;
+ struct PendingMessage * pm;
+ struct Receive_Message_Queue * receive_queue;
+ struct Plugin_Session_pair pair;
+ int check = 0;
+
+ GNUNET_assert(queue != NULL);
+ GNUNET_assert(queue->content != NULL);
+
+ //session found
+ //is this session pending for send
+ pendingsession = plugin->pending_Sessions_head;
+ while (pendingsession != NULL)
+ {
+ pendingsession_tmp = pendingsession->next;
+ if (pendingsession->content == queue->content)
+ {
+ plugin->pendingsessions--;
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail,
+ pendingsession);
+ GNUNET_free(pendingsession);
+
+ GNUNET_assert (check == 0);
+ check = 1;
+ }
+ pendingsession = pendingsession_tmp;
+ }
+
+ //is something of this session in the fragment queue?
+ pair.plugin = plugin;
+ pair.session = queue->content;
+ GNUNET_CONTAINER_heap_iterate(plugin->pending_Fragment_Messages,
+ &free_fragment_message_from_session, &pair);
+
+ //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);
+ }
+
+ // remove PendingMessage
+ pm = queue->content->pending_message2;
+ if (pm != NULL)
+ {
+ GNUNET_free_non_null(pm->msg);
+ GNUNET_free(pm);
+ }
+
+ GNUNET_CONTAINER_DLL_remove(plugin->sessions,
+ plugin->sessions_tail,
+ queue);
+ GNUNET_free(queue->content);
+ GNUNET_free(queue);
+ plugin->session_count--;
+ check_fragment_queue(plugin);
+}
+
+/**
+ * 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;
+ // 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)
+ {
+ free_session(plugin, queue);
return;
}
// try next
}
}
-
/**
* Convert the transports address to a nice, human-readable
* format.
* @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)
+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);
+
+ //GNUNET_assert(cls !=NULL);
if (addrlen != 6)
{
/* invalid address (MAC addresses have 6 bytes) */
GNUNET_break (0);
- asc (asc_cls, NULL);
+ asc(asc_cls, NULL);
return;
}
input = (const unsigned char*) addr;
- GNUNET_snprintf (ret,
- sizeof (ret),
- "%s Mac-Adress %X:%X:%X:%X:%X:%X",
- PROTOCOL_PREFIX,
- input[0], input[1], input[2], input[3], input[4], input[5]);
- asc (asc_cls, ret);
+ 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.
+ * Function to test if fragment number already exists in the fragments received
*
- * @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
+ * @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 int
-wlan_plugin_address_suggested (void *cls,
- const void *addr,
- size_t addrlen)
+is_double_msg(struct Receive_Message_Queue * rx_msg,
+ struct FragmentationHeader * fh)
{
- //struct Plugin *plugin = cls;
-
- /* check if the address is plausible; if so,
- add it to our list! */
+ //test if bitfield is okay
+#if DEBUG_wlan
+ check_message_fragment_bitfield(rx_msg);
+#endif
- GNUNET_assert(cls !=NULL);
- //FIXME mitm is not checked
- //Mac Adress has 6 bytes
- if (addrlen == 6){
- /* TODO check for bad addresses like milticast, broadcast, etc */
- return GNUNET_OK;
- } else {
- return GNUNET_SYSERR;
- }
+ return testBit((char *) &rx_msg->received_fragments, ntohs(
+ fh->fragment_off_or_num));
- 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
+ * 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 const char*
-wlan_plugin_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
+static void
+insert_fragment_in_queue(struct Receive_Message_Queue * rx_message,
+ struct Receive_Fragment_Queue * rx_frag)
{
- char ret[92];
- const unsigned char * input;
-
- GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ GNUNET_assert(rx_message != NULL);
+ GNUNET_assert(rx_frag != NULL);
+
+ struct Receive_Fragment_Queue * rx_frag2 = rx_message->frag_head;
+ struct WlanHeader * wlanheader;
+
+ //this is the first fragment of the message (fragment id 0)
+ if (rx_frag->num == 0)
{
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- return NULL;
+ wlanheader = (struct WlanHeader *) rx_frag->msg;
+ rx_message->rec_size = ntohs(wlanheader->header.size);
}
- input = (const unsigned char*) addr;
- GNUNET_snprintf (ret,
- sizeof (ret),
- "%s Mac-Adress %X:%X:%X:%X:%X:%X",
- PROTOCOL_PREFIX,
- input[0], input[1], input[2], input[3], input[4], input[5]);
- return GNUNET_strdup (ret);
+
+ //sort into list
+ while (rx_frag2 != NULL)
+ {
+ if (rx_frag2->num > rx_frag->num)
+ {
+ //next element number is grater than the current num
+ GNUNET_CONTAINER_DLL_insert_before(rx_message->frag_head, rx_message->frag_tail, rx_frag2, rx_frag);
+ setBit((char *) &rx_message->received_fragments, rx_frag->num);
+ return;
+ }
+ rx_frag2 = rx_frag2->next;
+ }
+
+ //no element has a grater number
+ GNUNET_CONTAINER_DLL_insert_tail(rx_message->frag_head, rx_message->frag_tail, rx_frag);
+
+ setBit((char *) &rx_message->received_fragments, rx_frag->num);
}
/**
- * Function to test if fragment number already exists in the fragments received
- *
- * @param session session the 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
+ * handels the data after all fragments are put together
+ * @param plugin
+ * @param session_light
+ * @param hdr pointer to the data
*/
-
-static const int
-is_double_msg(struct Session * session, struct FragmentationHeader * fh)
+static void
+wlan_data_message_handler(void *cls, void *client,
+ const struct GNUNET_MessageHeader *hdr)
{
- struct RecQueue * rec_queue = session->frag_head;
- while (rec_queue != NULL)
+ struct Plugin * plugin = (struct Plugin*) cls;
+ struct Session_light * session_light = (struct Session_light *) client;
+ struct WlanHeader * wlanheader;
+ struct Session * session;
+ const char * tempmsg;
+ const struct GNUNET_MessageHeader * temp_hdr;
+ struct GNUNET_PeerIdentity tmptarget;
+
+ if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
{
- if (rec_queue->num == fh->fragment_off_or_num)
+
+#if DEBUG_wlan
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "Func wlan_data_message_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))
{
- return GNUNET_YES;
+ //packet not big enought
+ return;
}
- rec_queue = rec_queue->next;
+ 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_message_handler got wrong message type\n");
+ return;
}
- return GNUNET_NO;
}
/**
- * Function to insert a fragment in a queue of a session
- * @param session session the fragment belongs to
- * @param rec_queue fragment to add
+ * 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
-insert_fragment_in_queue(struct Session * session, struct RecQueue * rec_queue)
+check_rx_finished_msg(struct Plugin* plugin,
+ struct Session_light * session_light, struct Session * session,
+ struct Receive_Message_Queue * rx_message)
{
- struct RecQueue * rec_queue2 = session->frag_head;
- struct WlanHeader * wlanheader = NULL;
- //first received fragment of message
- if (session->rec_size == NO_MESSAGE_OR_MESSAGE_FINISHED)
+ GNUNET_assert(rx_message !=NULL);
+
+ struct Receive_Fragment_Queue * rx_frag = rx_message->frag_head;
+ int packetsize = rx_message->rec_size;
+ int sum;
+ //TODO CLEANUP
+ //int aktnum;
+ uint64_t bitfield = 0;
+ //char * msg;
+
+ //check if first fragment is present
+ if (packetsize == MESSAGE_LENGHT_UNKNOWN)
{
- session->rec_size = MESSAGE_LENGHT_UNKNOWN;
+ return;
}
- //this is the first fragment of the message (fragment id 0)
- if (rec_queue->num == 0)
+ // 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))
{
- wlanheader = (struct WlanHeader *) rec_queue->msg;
- session->rec_size = wlanheader->header.size;
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Message not big enough\n");
+#endif
+ free_receive_message(plugin, rx_message);
+ return;
}
- //sort into list
- while (rec_queue2 != NULL)
+#if DEBUG_wlan
+ check_message_fragment_bitfield(rx_message);
+#endif
+
+ // if (rx_message->frag_tail->num == ffsl(rx_message->received_fragments))
+ // {
+ bitfield = ~bitfield;
+ bitfield = bitfield >> (63 - rx_message->frag_tail->num);
+ if (rx_message->received_fragments == bitfield)
{
- if (rec_queue2->num > rec_queue->num)
+ sum = 0;
+ while (rx_frag != NULL)
{
- //next element number is grater than the current num
- GNUNET_CONTAINER_DLL_insert_before(session->frag_head, session->frag_tail, rec_queue2, rec_queue);
- return;
+ sum += rx_frag->size;
+ rx_frag = rx_frag->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 cleanup
+
+ //copy fragments together
+ //msg = GNUNET_malloc(packetsize);
+ rx_frag = rx_message->frag_head;
+ //aktnum = 0;
+ /*while (rx_frag != NULL)
+ {
+ //TODO SAVE SOME COPY OPS AND CHECK CRC WITHOUT COPY
+ memcpy(msg + aktnum, rx_frag->msg, rx_frag->size);
+ aktnum += rx_frag->size;
+ rx_frag = rx_frag->next;
+ }*/
+
+ while (rx_frag != NULL)
+ {
+ if (rx_frag->next != NULL)
+ {
+ GNUNET_SERVER_mst_receive(plugin->fragment_tokenizer,
+ session_light, rx_frag->msg, rx_frag->size, GNUNET_NO,
+ GNUNET_NO);
+ }
+ else
+ {
+ //if it is the last fragment just kill all leftover
+ GNUNET_SERVER_mst_receive(plugin->fragment_tokenizer,
+ session_light, rx_frag->msg, rx_frag->size, GNUNET_YES,
+ GNUNET_NO);
+ }
+ rx_frag = rx_frag->next;
+ }
+ free_receive_message(plugin, rx_message);
+ //call wlan_process_helper to process the message
+ //wlan_data_message_handler(plugin, session_light,
+ // (struct GNUNET_MessageHeader*) msg);
+ //wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
+
+ //GNUNET_free(msg);
}
- rec_queue = rec_queue->next;
}
- //no element has a grater number
- GNUNET_CONTAINER_DLL_insert_tail(session->frag_head, session->frag_tail, rec_queue);
+ // }
+}
+
+//TODO DOXIGEN
+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; size: %u\n", session,
+ wlan_plugin_address_to_string(NULL, session->addr.mac, 6), htons(
+ hdr->size));
+#endif
+
+ plugin->env->receive(plugin->env->cls, &(session->target), hdr,
+ (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2, session,
+ (const char*) &session->addr, sizeof(session->addr));
}
/**
- * Function to dispose the fragments received for a message
- * @param session session to free the fragments from
+ * 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
*/
-static void
-free_rec_frag_queue(struct Session * session)
+void
+add_ack_for_send(struct Plugin * plugin, struct Session * session,
+ uint64_t bitfield, struct FragmentationHeader * fh)
{
- struct RecQueue * rec_queue = session->frag_head;
- struct RecQueue * rec_queue2;
- while (rec_queue != NULL)
+ 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)
{
- rec_queue2 = rec_queue;
- rec_queue = rec_queue->next;
- GNUNET_free(rec_queue2);
+ if ((rec_message->message_id_in == message_id) && (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, const struct Radiotap_rx * rxinfo)
+{
+ struct Receive_Fragment_Queue * rx_frag = NULL;
+ struct Receive_Message_Queue * rx_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);
+
+ rx_message = get_receive_message(plugin, session, ntohl(fh->message_id));
+
+ if (rx_message == NULL)
+ {
+ if (session->fragment_messages_in_count < MESSAGES_IN_QUEUE_PER_SESSION)
+ {
+ check_receive_message_timeouts(plugin, session);
+ }
+
+ if (session->fragment_messages_in_count < MESSAGES_IN_QUEUE_PER_SESSION)
+ {
+
+ //new message incoming
+ rx_message = GNUNET_malloc(sizeof (struct Receive_Message_Queue));
+ rx_message->message_id_in = ntohl(fh->message_id);
+ rx_message->rec_size = MESSAGE_LENGHT_UNKNOWN;
+ rx_message->session = session;
+ rx_message->received_fragments = 0;
+
+ GNUNET_CONTAINER_DLL_insert(plugin->receive_messages_head, plugin->receive_messages_teil, rx_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",
+ rx_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, akt in message_id %u\n",
+ get_receive_message_from_session(plugin, session)->message_id_in);
+ setBit((char *) &retval, ntohs(fh->fragment_off_or_num));
+ return retval;
+ }
}
- session->frag_head = NULL;
- session->frag_tail = NULL;
- session->rec_size = NO_MESSAGE_OR_MESSAGE_FINISHED;
-}
-/**
- * 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
- */
+ //reset timeout
+ rx_message->timeout = GNUNET_TIME_absolute_add(
+ GNUNET_TIME_absolute_get(),
+ MESSAGE_IN_TIMEOUT);
-static void
-check_rec_finished_msg (struct Plugin* plugin, struct Session_light * session_light, struct Session * session){
- struct RecQueue * rec_queue = session->frag_head;
- int packetsize = session->rec_size;
- int sum = 0;
- int aktnum = 0;
- char * msg;
- //some fragment should be received
- GNUNET_assert(session->rec_size != NO_MESSAGE_OR_MESSAGE_FINISHED);
- //check if first fragment is present
- if (session->rec_size == MESSAGE_LENGHT_UNKNOWN){
- return;
- }
- while (rec_queue != NULL){
- sum += rec_queue->size;
- //check if all fragment numbers are present
- if (rec_queue->num != aktnum){
- return;
- }
- aktnum ++;
- rec_queue = rec_queue->next;
- }
- //sum should always be smaller or equal of
- GNUNET_assert(sum <= packetsize);
- if(sum == packetsize){
+ if (is_double_msg(rx_message, fh) != GNUNET_YES)
+ {
+
+ //report size
+ rx_frag = GNUNET_malloc(sizeof (struct Receive_Fragment_Queue) +
+ ntohs(fh->header.size) - sizeof(struct FragmentationHeader));
+ rx_frag->size = ntohs(fh->header.size)
+ - sizeof(struct FragmentationHeader);
+ rx_frag->num = ntohs(fh->fragment_off_or_num);
+ rx_frag->msg = (char*) &(rx_frag[1]);
+ //copy msg to buffer
+ memcpy((char *) rx_frag->msg, tempmsg, rx_frag->size);
+ memcpy((char *) &(rx_frag->rxinfo), rxinfo, sizeof(rxinfo));
+ insert_fragment_in_queue(rx_message, rx_frag);
+ //save bitfield
+ retval = rx_message->received_fragments;
#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "check_rec_finished_msg: A message with fragments is complete\n");
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "New fragment: size %u, fragsize %u, message id %u, bitfield %X, session %u\n",
+ rx_message->rec_size, rx_frag->size, rx_message->message_id_in,
+ rx_message->received_fragments, session);
#endif
- //copy fragments together
- msg = GNUNET_malloc(packetsize);
- rec_queue = session->frag_head;
- aktnum = 0;
- while (rec_queue != NULL){
- memcpy(msg + aktnum, rec_queue->msg, rec_queue->size);
- aktnum += rec_queue->size;
- rec_queue = rec_queue->next;
+ check_rx_finished_msg(plugin, session_light, session, rx_message);
+ }
+ else
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN fragment is a clone\n");
+ retval = rx_message->received_fragments;
+
}
- free_rec_frag_queue(session);
- //call wlan_process_helper to process the message
- wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
+ return retval;
- GNUNET_free(msg);
- }
}
/**
* Function used for to process the data received from the wlan interface
*
* @param cls the plugin handle
- * @param client client which send the data (not used)
+ * @param session_light FIXME: document
* @param hdr hdr of the GNUNET_MessageHeader
*/
static void
-wlan_data_helper(void *cls, void * client, const struct GNUNET_MessageHeader * hdr)
+wlan_data_helper(void *cls, struct Session_light * session_light,
+ const struct GNUNET_MessageHeader * hdr, const struct Radiotap_rx * rxinfo)
{
struct Plugin *plugin = cls;
- struct Session * session = NULL;
- struct Session_light * session_light = NULL;
-
- struct WlanHeader * wlanheader = NULL;
- struct FragmentationHeader * fh = NULL;
- struct FragmentMessage * fm = NULL;
+ struct Session * session;
- const char * tempmsg = NULL;
+ struct FragmentationHeader * fh;
+ struct FragmentationAckHeader * fah;
+ struct FragmentMessage * fm;
- struct AckQueue * ack = NULL;
- struct AckQueue * ack2 = NULL;
+ const char * tempmsg;
- struct RecQueue * rec_queue = NULL;
- const struct GNUNET_MessageHeader * temp_hdr = 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: %i\n",
- ntohs(hdr->size));
+ "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.mac, 6));
#endif
- //TODO better DOS protection, error handling
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
if (session_light->session == NULL)
{
- session_light->session = get_Session(plugin, session_light->addr);
+ session_light->session = get_session(plugin, &session_light->addr);
}
GNUNET_assert(GNUNET_HELLO_get_id(
(const struct GNUNET_HELLO_Message *) &hdr[1],
}
+ //FRAGMENT
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT)
{
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_DATA size: %i\n",
- ntohs(hdr->size));
-#endif
-
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
+ GNUNET_assert(session_light != NULL);
if (session_light->session == NULL)
{
- session_light->session = search_session(plugin, session_light->addr);
+ 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, wlanheader->header.size) != wlanheader->crc)
- {
- //wrong crc, dispose message
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN message crc was wrong\n");
- return;
- }
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "After crc\n");
-#endif
-
- //if not in session list
- if (session == NULL)
- {
-
- //try if it is a hello message
- if (ntohs(temp_hdr->type) == GNUNET_MESSAGE_TYPE_HELLO)
- {
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "New WLAN Client\n");
-#endif
- session = create_session(plugin, session_light->addr);
- session_light->session = session;
- GNUNET_assert(GNUNET_HELLO_get_id(
- (const struct GNUNET_HELLO_Message *) temp_hdr,
- &session->target ) != GNUNET_SYSERR);
-
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and not a hello message\n");
- return;
- }
- }
-
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "After session\n");
-#endif
-
- //"receive" the message
- 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,
- "After Information\n");
-#endif
- plugin->env->receive(plugin->env, &(session->target), temp_hdr,
- (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2,
- session, session->addr, sizeof(session->addr));
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "After receive\n");
-#endif
-
- }
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT)
- {
+ 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 size: %i\n",
- ntohs(hdr->size));
+ "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.mac, 6));
#endif
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
- if (session_light->session == NULL)
+ if (getcrc16(tempmsg, ntohs(fh->header.size)) != ntohs(fh->message_crc))
{
- session_light->session = search_session(plugin, session_light->addr);
+ //wrong crc, dispose message
+ GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN fragment crc was wrong\n");
+ return;
}
- session = session_light->session;
-
- fh = (struct FragmentationHeader *) hdr;
- tempmsg = (char*) &fh[1];
- //if not in session list
+ //if in the session list
if (session != NULL)
{
- if (getcrc16(tempmsg, fh->header.size) != fh->message_crc)
- {
- //wrong crc, dispose message
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment crc was wrong\n");
- return;
- }
- else
- {
- //todo fragments do not timeout
- //check if message_id is rigth or it is a new msg
- if ((session->message_id_in == ntohs(fh->message_id))
- || (session->rec_size == NO_MESSAGE_OR_MESSAGE_FINISHED))
- {
- session->message_id_in = ntohs(fh->message_id);
- if (is_double_msg(session, fh) != GNUNET_YES)
- {
- rec_queue
- = GNUNET_malloc(sizeof (struct RecQueue) +
- 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(session, rec_queue);
- check_rec_finished_msg(plugin, session_light, session);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment is a clone\n");
- return;
- }
- }
- else
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment message_id and session message_id are not the same and a message is already (partly) received\n");
- return;
- }
- }
+ fragment_bitfield = insert_fragment_in_in_message_queue(plugin,
+ session_light, session, fh, rxinfo);
}
else
{
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and it is a fragment message\n");
- return;
+ // 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), ntohl(fh->message_id));
+
+ GNUNET_SERVER_mst_receive(plugin->fragment_tokenizer, session_light,
+ tempmsg, ntohs(hdr->size) - sizeof(struct FragmentationHeader),
+ GNUNET_YES, GNUNET_NO);
+ //wlan_data_message_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);
+ set_next_send(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: %i\n",
- ntohs(hdr->size));
+ "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.mac, 6));
#endif
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
+ GNUNET_assert(session_light != NULL);
if (session_light->session == NULL)
{
- session_light->session = search_session(plugin, session_light->addr);
+ session_light->session = search_session(plugin, &session_light->addr);
GNUNET_assert(session_light->session != NULL);
}
session = session_light->session;
- fh = (struct FragmentationHeader *) &hdr[1];
- if (fh->message_id == session->message_id_out)
+ fah = (struct FragmentationAckHeader *) hdr;
+ fm = get_fragment_message_from_session_and_id(plugin, session, ntohl(
+ fah->message_id));
+
+ if (fm != NULL)
{
- fm = get_fragment_message_from_session(session);
- if (fm != NULL)
- {
- ack2 = fm->head;
- while (ack2 != NULL)
- {
- // check for double
- if (ack2->fragment_num != fh->fragment_off_or_num)
- {
- // check if next ack has bigger number
- if (ack2->fragment_num > fh->fragment_off_or_num)
- {
- ack = GNUNET_malloc(sizeof(struct AckQueue));
- ack->fragment_num = fh->fragment_off_or_num;
- GNUNET_CONTAINER_DLL_insert_before(fm->head,fm->tail,ack2,ack);
- //check if finished
- check_finished_fragment(plugin, fm);
- return;
- }
- }
- else
- {
- //double ack
- return;
- }
- ack2 = ack2->next;
- }
- //GNUNET_CONTAINER_DLL_insert_tail(fm->head,fm->tail,ack);
- //should never happen but...
- //check_finished_fragment(plugin, fm);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN fragment not in fragment list but id is right\n");
- return;
- }
+ fm->ack_bitfield = fm->ack_bitfield | GNUNET_ntohll(
+ fah->fragment_field);
+ fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(fm));
+
+#if DEBUG_wlan_retransmission
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got ack for: %u; %u\n",
+ fm->message_id_out, fm->ack_bitfield);
+#endif
+ check_finished_fragment(plugin, fm);
+ set_next_send(plugin);
}
+ 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");
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_INFO,
+ "WLAN packet inside the WLAN helper packet has not the right type: %u size: %u\n",
+ ntohs(hdr->type), ntohs(hdr->size));
+ GNUNET_break(0);
return;
}
-#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Helper finished\n");
+#if 0
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Helper finished\n");
#endif
}
+//TODO DOXIGEN
+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;
+}
+
/**
* Function used for to process the data from the suid process
*
* @param cls the plugin handle
- * @param client which send the data (not used)
- * @param hdr of the GNUNET_MessageHeader
+ * @param client client that send the data (not used)
+ * @param hdr header of the GNUNET_MessageHeader
*/
-
static void
-wlan_process_helper (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr)
+wlan_process_helper(void *cls, void *client,
+ const struct GNUNET_MessageHeader *hdr)
{
struct Plugin *plugin = cls;
- struct IeeeHeader * wlanIeeeHeader = NULL;
+ struct ieee80211_frame * wlanIeeeHeader = NULL;
struct Session_light * session_light = NULL;
+ struct Radiotap_rx * rxinfo;
const struct GNUNET_MessageHeader * temp_hdr = NULL;
- int pos = 0;
+ int datasize = 0;
+ int pos;
-
- if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA)
+ 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: %i\n",
- ntohs(hdr->size));
+ 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) + sizeof(struct Radiotap_rx))
+ {
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Size of packet is too small; size: %u min size: %u\n", ntohs(
+ hdr->size), sizeof(struct ieee80211_frame)
+ + sizeof(struct GNUNET_MessageHeader));
#endif
+ //GNUNET_break (0);
+ /* FIXME: restart SUID process */
+ return;
+ }
+ rxinfo = (struct Radiotap_rx *) &hdr[1];
+ wlanIeeeHeader = (struct ieee80211_frame *) &rxinfo[1];
- //call wlan_process_helper with the message inside, later with wlan: analyze signal
- GNUNET_assert(ntohs(hdr->size) >= sizeof(struct IeeeHeader));
- wlanIeeeHeader = (struct IeeeHeader *) &hdr[1];
+ //process only if it is an broadcast or for this computer both with the gnunet bssid
- session_light = GNUNET_malloc(sizeof(struct Session_light));
- memcpy(session_light->addr, &(wlanIeeeHeader->mac3), sizeof(struct MacAddress));
- session_light->session = search_session(plugin, session_light->addr);
+ //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 only if it is an broadcast or for this computer both with the gnunet bssid
- //check for bssid
- if (memcmp(&(wlanIeeeHeader->mac2), macbc, sizeof(struct MacAddress)))
- {
- //check for broadcast or mac
- if (memcmp(&(wlanIeeeHeader->mac1), bc_all_mac, sizeof(struct MacAddress))
- || memcmp(&(wlanIeeeHeader->mac1), &(plugin->mac_address),
- sizeof(struct MacAddress)))
- {
- // process the inner data
- pos = 0;
- temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1];
- while (pos < hdr->size)
- {
- wlan_data_helper(plugin, session_light, temp_hdr);
- pos += temp_hdr->size + sizeof(struct GNUNET_MessageHeader);
- }
- }
- }
+ // process the inner data
- //clean up
- GNUNET_free(session_light);
- }
+ datasize = ntohs(hdr->size) - sizeof(struct ieee80211_frame)
+ - sizeof(struct GNUNET_MessageHeader)
+ - sizeof(struct Radiotap_rx);
+ 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;
+ while (pos < datasize)
+ {
+ temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1]
+ + pos;
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL)
- {
+ wlan_data_helper(plugin, session_light, temp_hdr, rxinfo);
+ 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 GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL size: %i\n",
- ntohs(hdr->size));
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Func wlan_process_helper got wrong MAC: %s\n", macprinter(
+ wlanIeeeHeader->i_addr1));
#endif
-
- //TODO more control
- //TODO use struct wlan_helper_control
- if (ntohs(hdr->size) == sizeof(struct Wlan_Helper_Control_Message))
- {
- //plugin->mac_address = GNUNET_malloc(sizeof(struct MacAddress));
- memcpy(&(plugin->mac_address), &hdr[1], sizeof(struct MacAddress));
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Notifying transport of address %s\n",
- wlan_plugin_address_to_string(cls, &(plugin->mac_address), ntohs(hdr->size) - sizeof(struct GNUNET_MessageHeader)));
- plugin->env->notify_address(plugin->env->cls, "wlan",
- &plugin->mac_address, sizeof(struct MacAddress),
- GNUNET_TIME_UNIT_FOREVER_REL);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Wrong wlan mac address %s\n",
- plugin->mac_address);
- }
-
- }
-
-
- else
- {
- // TODO Wrong data?
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN helper packet has not the right type\n");
- return;
+ }
+ }
+ 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;
}
}
* @param cls the plugin handle
* @param tc the scheduling context
*/
-
static void
-wlan_plugin_helper_read (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+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)
+ if (0 != (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));
+ 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);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ _("Finished reading from wlan-helper stdout with code: %d\n"),
+ bytes);
#endif
return;
}
- GNUNET_SERVER_mst_receive(plugin->consoltoken, NULL,
- mybuf, bytes, GNUNET_NO, GNUNET_NO);
+ 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);
+ 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.
*
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);
+ 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);
+ 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,
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"Failed to start gnunet-wlan-helper process\n");
#endif
return GNUNET_SYSERR;
GNUNET_assert(plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
#if DEBUG_wlan
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ 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;
}
-
/**
* Exit point from the plugin.
+ * @param cls pointer to the api struct
*/
-//TODO doxigen
+
//FIXME cleanup
void *
-libgnunet_plugin_transport_wlan_done (void *cls)
+libgnunet_plugin_transport_wlan_done(void *cls)
{
struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
struct Plugin *plugin = api->cls;
+ struct Sessionqueue * queue = plugin->sessions;
+ struct Sessionqueue * queue_next;
+ struct FragmentMessage * fm;
#if DEBUG_wlan
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"libgnunet_plugin_transport_wlan_done started\n");
#endif
- GNUNET_assert(cls !=NULL);
- if (plugin->consoltoken != NULL)
- GNUNET_SERVER_mst_destroy(plugin->consoltoken);
+ GNUNET_OS_process_close(plugin->server_proc);
+ GNUNET_DISK_pipe_close(plugin->server_stdout);
+ GNUNET_DISK_pipe_close(plugin->server_stdin);
+
+ GNUNET_assert (cls !=NULL);
+ //free sessions
+ while (queue != NULL)
+ {
+ queue_next = queue->next;
+ free_session(plugin, queue);
+ queue = queue_next;
+
+ }
+ if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (plugin->server_write_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(plugin->server_write_task);
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (plugin->server_read_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(plugin->server_read_task);
+ plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+
+ if (plugin->suid_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy(plugin->suid_tokenizer);
+
+ if (plugin->data_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy(plugin->data_tokenizer);
+
+ if (plugin->fragment_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy(plugin->fragment_tokenizer);
+
+ fm = (struct FragmentMessage *) GNUNET_CONTAINER_heap_peek(
+ plugin->pending_Fragment_Messages);
+
+ while (fm != NULL)
+ {
+ free_fragment_message(plugin, fm);
+ fm = (struct FragmentMessage *) GNUNET_CONTAINER_heap_peek(
+ plugin->pending_Fragment_Messages);
+ }
GNUNET_free_non_null(plugin->interface);
+ GNUNET_CONTAINER_heap_destroy(plugin->pending_Fragment_Messages);
GNUNET_free (plugin);
GNUNET_free (api);
return NULL;
* @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;
+ static unsigned long long testmode = 0;
GNUNET_assert(cls !=NULL);
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->pending_Fragment_Messages = GNUNET_CONTAINER_heap_create(
+ GNUNET_CONTAINER_HEAP_ORDER_MIN);
+ plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper,
+ plugin);
- if (GNUNET_CONFIGURATION_have_value(env->cfg, "transport-wlan", "TESTMODE"))
- {
- if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(env->cfg, "transport-wlan",
- "TESTMODE", &testmode))
- return NULL;
- }
-
- 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(plugin);
- return NULL;
- }
- }
-
- wlan_transport_start_wlan_helper(plugin, testmode);
- plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin);
+ plugin->data_tokenizer = GNUNET_SERVER_mst_create(&process_data, plugin);
+ plugin->fragment_tokenizer = GNUNET_SERVER_mst_create(
+ &wlan_data_message_handler, plugin);
//plugin->sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
- //plugin->pending_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
+ //plugin->pending_Sessions_head = GNUNET_malloc (sizeof (struct Sessionqueue));
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->cls = plugin;
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);
- start_next_message_id();
+ wlan_transport_start_wlan_helper(plugin, testmode);
#if DEBUG_wlan
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "wlan init finished\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "wlan init finished\n");
#endif
return api;
projects / oweals / gnunet.git / blobdiff