#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
#include "gnunet_crypto_lib.h"
+#include "wlan/ieee80211.h"
#define PROTOCOL_PREFIX "wlan"
#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
#define FRAGMENT_QUEUE_SIZE 10
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1
+
+#define MESSAGE_IN_TIMEOUT GNUNET_TIME_UNIT_SECONDS
+
+#define MESSAGES_IN_QUEUE_SIZE 10
+#define MESSAGES_IN_QUEUE_PER_SESSION 1
#define HALLO_BEACON_SCALING_FACTOR 900
-#define DEBUG_wlan GNUNET_NO
+#define DEBUG_wlan GNUNET_YES
#define MESSAGE_LENGHT_UNKNOWN -1
-#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
+//#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
/**
* After how long do we expire an address that we
unsigned int pending_fragment_messages;
+ /**
+ * Messages in the in Queue, head
+ */
+
+ struct Receive_Message_Queue * receive_messages_head;
+
+ /**
+ * Messages in the in Queue, tail
+ */
+
+ struct Receive_Message_Queue * receive_messages_teil;
+
+ /**
+ * 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
+ * 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;
};
/**
- * Queue of ack received for messages send
+ * Queue for the fragments received
*/
-struct AckQueue
+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;
};
/**
* 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;
};
/**
/**
* ID of message, to distinguish between the messages, picked randomly.
*/
- uint32_t message_id GNUNET_PACKED;
+ uint32_t message_id;
/**
- * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ * Bit field for received fragments
*/
- uint16_t fragment_off_or_num GNUNET_PACKED;
+ uint64_t fragments_field;
};
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
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 GNUNET_TIME_Absolute next_ack;
/**
- * Sorted queue with the acks received for fragments; head
+ * bitfield with all acks received for this message
*/
-
- struct AckQueue * head;
-
- /**
- * Sorted queue with the acks received for fragments; tail
- */
-
- struct AckQueue * tail;
+ uint64_t ack_bitfield;
/**
* Size of the message
*/
uint32_t message_pos;
+ /**
+ * current number for message outgoing, to distinguish between the messages
+ */
+ uint32_t message_id_out;
};
/**
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.
*/
*/
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;
+// followed by payload
+
+};
/**
- * checksum/error correction
+ * Header for messages which need fragmentation
*/
-// uint32_t crc GNUNET_PACKED;
+struct FragmentationAckHeader
+{
+
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * ID of message, to distinguish between the messages, picked randomly.
+ */
+ uint32_t message_id GNUNET_PACKED;
-// followed by payload unless ACK
+ /**
+ * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ */
+ uint64_t fragment_field GNUNET_PACKED;
};
int
-getRadiotapHeader(struct RadiotapHeader * Header);
+getRadiotapHeader(struct Plugin * plugin, struct Session * session,
+ struct Radiotap_Send * Header);
int
-getWlanHeader(struct IeeeHeader * Header,const char * to_mac_addr,
+getWlanHeader(struct ieee80211_frame * Header, const char * to_mac_addr,
struct Plugin * plugin);
static int
getcrc32(const char *msgbuf, size_t msgbuf_size);
static void
-free_rec_frag_queue(struct Session * session);
+free_receive_message(struct Plugin* plugin,
+ struct Receive_Message_Queue * rec_message);
+
+struct Receive_Message_Queue *
+get_receive_message_from_session(struct Plugin * plugin,
+ struct Session * session);
static void
wlan_data_helper(void *cls, struct Session_light * session_light,
static const char *
wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen);
+struct Receive_Message_Queue *
+get_receive_message(struct Plugin * plugin, struct Session * session,
+ uint32_t message_id);
+
+static uint64_t
+htonll(uint64_t input)
+{
+ return input;
+}
+
+static uint64_t
+ntohll(uint64_t input)
+{
+ return input;
+}
+
+/**
+ * Sets a bit active in the bitArray. Increment bit-specific
+ * usage counter on disk only if below 4bit max (==15).
+ *
+ * @param bitArray memory area to set the bit in
+ * @param bitIdx which bit to set
+ */
+static void
+setBit(char *bitArray, unsigned int bitIdx)
+{
+ size_t arraySlot;
+ unsigned int targetBit;
+
+ arraySlot = bitIdx / 8;
+ targetBit = (1L << (bitIdx % 8));
+ bitArray[arraySlot] |= targetBit;
+}
+
+/**
+ * Clears a bit from bitArray. Bit is cleared from the array
+ * only if the respective usage counter on the disk hits/is zero.
+ *
+ * @param bitArray memory area to set the bit in
+ * @param bitIdx which bit to unset
+ */
+/*static void
+ clearBit(char *bitArray, unsigned int bitIdx)
+ {
+ size_t slot;
+ unsigned int targetBit;
+
+ slot = bitIdx / 8;
+ targetBit = (1L << (bitIdx % 8));
+ bitArray[slot] = bitArray[slot] & (~targetBit);
+ }*/
+
+/**
+ * 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;
+
+ slot = bitIdx / 8;
+ targetBit = (1L << (bitIdx % 8));
+ if (bitArray[slot] & targetBit)
+ return GNUNET_YES;
+ else
+ 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
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->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));
+ 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;
}
-//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
struct FragmentMessage * fm;
struct GNUNET_TIME_Relative next_send;
- next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
-
//cancel old task
if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
{
//check if some acks are in the queue
if (plugin->ack_send_queue_head != NULL)
{
- next_send = GNUNET_TIME_relative_get_zero();
+ next_send = GNUNET_TIME_UNIT_ZERO;
}
//check if there are some fragments in the queue
- else 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
+ = GNUNET_TIME_relative_min(next_send, get_next_frag_timeout(fm));
+ }
}
plugin->server_write_delay_task = GNUNET_SCHEDULER_add_delayed(next_send,
&delay_fragment_task, plugin);
while (sessionqueue != NULL)
{
session = sessionqueue->content;
+
pm = session->pending_message;
+ if (pm == NULL)
+ {
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ "pending message is empty, should not happen. session %p\n",
+ session);
+#endif
+ }
+ GNUNET_assert(pm != NULL);
//check for message timeout
if (GNUNET_TIME_absolute_get_remaining(pm->timeout).rel_value > 0)
{
//check if session has no message in the fragment queue
- if (!session->has_fragment)
+ if (session->fragment_messages_out_count
+ < FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION)
{
plugin->pendingsessions--;
GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
else
{
- session->pending_message = NULL;
+ 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_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);
+ if (session->pending_message == NULL)
+ {
+ sessionqueue_alt = sessionqueue;
+ sessionqueue = sessionqueue->next;
+ plugin->pendingsessions--;
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
+ plugin->pending_Sessions_tail, sessionqueue_alt);
- GNUNET_free(sessionqueue_alt);
+ GNUNET_free(sessionqueue_alt);
+ }
}
{
if (fm != NULL)
{
- free_acks(fm);
+ (fm->session->fragment_messages_out_count)--;
GNUNET_free_non_null(fm->msg);
GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
plugin->pending_Fragment_Messages_tail, fm);
GNUNET_free(fm);
plugin->pending_fragment_messages--;
- check_fragment_queue(plugin);
#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Pending fragment messages: %u\n", plugin->pending_fragment_messages);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "free pending fragment messages, pending messages remaining %u\n",
+ plugin->pending_fragment_messages);
#endif
}
}
{
pm = session->pending_message;
session->pending_message = NULL;
- session->has_fragment = 1;
+ session->fragment_messages_out_count++;
GNUNET_assert(pm != NULL);
fm = GNUNET_malloc(sizeof(struct FragmentMessage));
fm->timeout.abs_value = pm->timeout.abs_value;
fm->message_pos = 0;
fm->next_ack = GNUNET_TIME_absolute_get();
+ fm->message_id_out = get_next_message_id();
+ fm->ack_bitfield = 0;
+
+ sort_fragment_into_queue(plugin, fm);
+ plugin->pending_fragment_messages++;
- if (pm->transmit_cont != NULL) {
- pid = session->target;
- pm->transmit_cont(pm->transmit_cont_cls, &pid,
- GNUNET_OK);
+ if (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);
+ 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);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "no pm->transmit_cont for %p\n", session);
#endif
}
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();
+ if (session->pending_message2 != NULL)
+ {
+ session->pending_message = session->pending_message2;
+ session->pending_message2 = NULL;
+ //requeue session
+ queue_Session(plugin, session);
+ }
//check if timeout changed
check_next_fragment_timeout(plugin);
static void
check_finished_fragment(struct Plugin * plugin, struct FragmentMessage * fm)
{
- struct AckQueue * ack;
- int counter = 0;
-
- if (fm->message_size >= (WLAN_MTU - sizeof(struct FragmentationHeader))
- * fm->tail->fragment_num)
+ //maxack = size of message / max packet size, eg 12 / 5 = 2 start at 0 so ack numbers are 0,1,2
+ unsigned int maxack = 63 - ((fm->message_size - 1) / (WLAN_MTU
+ - sizeof(struct FragmentationHeader)));
+ uint64_t tmpfield = UINT64_MAX;
+ tmpfield = tmpfield >> maxack;
+
+ //#if DEBUG_wlan
+ if (maxack != 63)
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Test bitfields %X and %X, maxack is %u, fm size %u\n",
+ fm->ack_bitfield, tmpfield, maxack, fm->message_size);
+ //#endif
+
+ if (fm->ack_bitfield == tmpfield)
{
- 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;
+
free_fragment_message(plugin, fm);
#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Finished a fragmented message\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Finished sending and got all acks for a fragmented message\n");
#endif
-
check_next_fragment_timeout(plugin);
+ check_fragment_queue(plugin);
}
}
void
set_next_message_fragment_pos(struct FragmentMessage * fm)
{
- struct AckQueue * akt = NULL;
+
//check if retransmit is needed
if (GNUNET_TIME_absolute_get_remaining(fm->next_ack).rel_value == 0)
{
fm->message_pos = 0;
}
- akt = fm->head;
//test if ack 0 (or X) was already received
- while (akt != NULL)
+ while (testBit((char*) &fm->ack_bitfield, fm->message_pos) == GNUNET_YES)
{
- //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;
-
+ fm->message_pos++;
}
}
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending hello beacon\n");
#endif
- uint16_t size = 0;
- ssize_t bytes;
- struct GNUNET_MessageHeader * msgheader = NULL;
- struct IeeeHeader * ieeewlanheader = NULL;
- struct RadiotapHeader * radioHeader = NULL;
- struct GNUNET_MessageHeader * msgheader2 = NULL;
-
- GNUNET_assert(sizeof(struct WlanHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello)) <= WLAN_MTU);
- size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct RadiotapHeader)
- + sizeof(struct IeeeHeader) + sizeof(struct GNUNET_MessageHeader)
- + GNUNET_HELLO_size(*(plugin->env->our_hello));
-
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
- ieeewlanheader = (struct IeeeHeader*) &radioHeader[1];
- getWlanHeader(ieeewlanheader, bc_all_mac, plugin);
-
- msgheader2 = (struct GNUNET_MessageHeader*) &ieeewlanheader[1];
- msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello))
- + sizeof(struct GNUNET_MessageHeader));
-
- msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
- memcpy(&msgheader2[1], *plugin->env->our_hello, GNUNET_HELLO_size(
- *(plugin->env->our_hello)));
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
-
- if (bytes == GNUNET_SYSERR)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
- errno, strerror(errno));
-
- }
- GNUNET_assert(bytes != GNUNET_SYSERR);
- GNUNET_assert(bytes == size);
- GNUNET_free(msgheader);
+ uint16_t size = 0;
+ ssize_t bytes;
+ struct GNUNET_MessageHeader * msgheader = NULL;
+ struct ieee80211_frame * ieeewlanheader = NULL;
+ struct Radiotap_Send * radioHeader = NULL;
+ struct GNUNET_MessageHeader * msgheader2 = NULL;
+
+ GNUNET_assert(sizeof(struct WlanHeader) + GNUNET_HELLO_size(
+ *(plugin->env->our_hello)) <= WLAN_MTU);
+ size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
+ + sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader)
+ + GNUNET_HELLO_size(*(plugin->env->our_hello));
+
+ msgheader = GNUNET_malloc(size);
+ msgheader->size = htons(size);
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
+
+ radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ getRadiotapHeader(plugin, NULL, radioHeader);
+ ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
+ getWlanHeader(ieeewlanheader, bc_all_mac, plugin);
+
+ msgheader2 = (struct GNUNET_MessageHeader*) &ieeewlanheader[1];
+ msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello))
+ + sizeof(struct GNUNET_MessageHeader));
+
+ msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
+ memcpy(&msgheader2[1], *plugin->env->our_hello, GNUNET_HELLO_size(
+ *(plugin->env->our_hello)));
+
+ bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
+
+ if (bytes == GNUNET_SYSERR)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ _("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
+ errno, strerror(errno));
+
+ }
+ GNUNET_assert(bytes != GNUNET_SYSERR);
+ GNUNET_assert(bytes == size);
+ GNUNET_free(msgheader);
set_next_beacon_time(plugin);
check_next_fragment_timeout(plugin);
uint16_t size = 0;
ssize_t bytes;
struct GNUNET_MessageHeader * msgheader = NULL;
- struct IeeeHeader * ieeewlanheader = NULL;
- struct RadiotapHeader * radioHeader = NULL;
- struct FragmentationHeader * msgheader2 = NULL;
+ struct ieee80211_frame * ieeewlanheader = NULL;
+ struct Radiotap_Send * radioHeader = NULL;
+ struct FragmentationAckHeader * msgheader2 = NULL;
- GNUNET_assert(sizeof(struct FragmentationHeader) <= WLAN_MTU);
+ GNUNET_assert(sizeof(struct FragmentationAckHeader) <= WLAN_MTU);
#if DEBUG_wlan
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Sending ack for message_id %u with fragment number %u\n",
- ack->message_id, ack->fragment_off_or_num);
+ "Sending ack for message_id %u with fragment field %u\n",
+ ack->message_id, ack->fragments_field);
#endif
- size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct RadiotapHeader)
- + sizeof(struct IeeeHeader) + sizeof(struct FragmentationHeader);
+ size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
+ + sizeof(struct ieee80211_frame) + sizeof(struct FragmentationAckHeader);
msgheader = GNUNET_malloc(size);
msgheader->size = htons(size);
msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
- radioHeader = (struct RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
- ieeewlanheader = (struct IeeeHeader*) &radioHeader[1];
+ radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ getRadiotapHeader(plugin, ack->session, radioHeader);
+ ieeewlanheader = (struct ieee80211_frame*) &radioHeader[1];
getWlanHeader(ieeewlanheader, ack->session->addr, plugin);
- msgheader2 = (struct FragmentationHeader*) &ieeewlanheader[1];
- msgheader2->header.size = htons(sizeof(struct FragmentationHeader));
+ 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_off_or_num = htons(ack->fragment_off_or_num);
+ msgheader2->fragment_field = htonll(ack->fragments_field);
bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
if (bytes == GNUNET_SYSERR)
struct Session * session = NULL;
struct FragmentMessage * fm = NULL;
- struct IeeeHeader * ieeewlanheader = NULL;
- struct RadiotapHeader * radioHeader = NULL;
+ struct ieee80211_frame * ieeewlanheader = NULL;
+ struct Radiotap_Send * radioHeader = NULL;
struct GNUNET_MessageHeader * msgheader = NULL;
struct FragmentationHeader fragheader;
#if DEBUG_wlan
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "message timeout\n");
#endif
- 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);
-
- GNUNET_free(fm->msg);
- GNUNET_free(fm);
check_fragment_queue(plugin);
+ free_fragment_message(plugin, fm);
+
}
else
{
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(copyoffset < fm->message_size);
- copystart = fm->msg + copyoffset;
- copysize = GNUNET_MIN(fm->message_size - copyoffset,
- WLAN_MTU - sizeof(struct FragmentationHeader));
- fragheader.header.size = htons(copysize
+
+#if DEBUG_wlan
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "Sending GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT with message_id %u with fragment number %i, size: %u, offset %u, time until timeout %u\n",
+ fm->message_id_out, fm->message_pos, copysize
+ + sizeof(struct FragmentationHeader), copyoffset,
+ GNUNET_TIME_absolute_get_remaining(fm->timeout));
+#endif
+
+ fragheader.fragment_off_or_num = htons(fm->message_pos);
+ fragheader.message_id = htonl(fm->message_id_out);
+ copystart = fm->msg + copyoffset;
+ copysize = GNUNET_MIN(fm->message_size - copyoffset,
+ WLAN_MTU - sizeof(struct FragmentationHeader));
+
+ if (copyoffset >= fm->message_size)
+ {
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_ERROR,
+ "offset in message for fragment too large, offset %u, size %u, max size %u, copysize %u, message_pos %u,\n",
+ copyoffset, fm->message_size, WLAN_MTU
+ - sizeof(struct FragmentationHeader), copysize,
+ fm->message_pos);
+ }
+ GNUNET_assert(copyoffset < fm->message_size);
+ //FIXME remove later
+ GNUNET_assert(copystart < fm->msg + fm->message_size);
+
+ fragheader.header.size = htons(copysize
+ sizeof(struct FragmentationHeader));
fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
copysize = fm->message_size;
}*/
-#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, time until timeout %u\n",
- session->message_id_out, fm->message_pos, copysize
- + sizeof(struct FragmentationHeader),
- GNUNET_TIME_absolute_get_remaining(fm->timeout));
-#endif
-
size += copysize;
- size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
+ 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 RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
+ radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ getRadiotapHeader(plugin, session, radioHeader);
- ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
+ ieeewlanheader = (struct ieee80211_frame *) &radioHeader[1];
getWlanHeader(ieeewlanheader, fm->session->addr, plugin);
//could be faster if content is just send and not copyed before
}
int
-getRadiotapHeader(struct RadiotapHeader * Header)
+getRadiotapHeader(struct Plugin * plugin, struct Session * session,
+ struct Radiotap_Send * header)
{
+
+ header->rate = session->rate;
+ header->tx_power = session->tx_power;
+ header->antenna = session->antenna;
return GNUNET_YES;
}
;
*/
int
-getWlanHeader(struct IeeeHeader * Header,const char * const to_mac_addr,
+getWlanHeader(struct ieee80211_frame * Header, const char * const to_mac_addr,
struct Plugin * plugin)
{
- memcpy(&Header->mac2, macbc, sizeof(macbc));
- memcpy(&Header->mac3, plugin->mac_address.mac, sizeof(plugin->mac_address));
- memcpy(&Header->mac1, to_mac_addr, sizeof(plugin->mac_address));
+ memcpy(&Header->i_addr3, mac_bssid, sizeof(mac_bssid));
+ memcpy(&Header->i_addr2, plugin->mac_address.mac, sizeof(plugin->mac_address));
+ memcpy(&Header->i_addr1, to_mac_addr, sizeof(plugin->mac_address));
return GNUNET_YES;
}
struct Plugin * plugin = cls;
struct PendingMessage * newmsg = NULL;
struct WlanHeader * wlanheader = NULL;
- struct GNUNET_MessageHeader * innermsg =
- (struct GNUNET_MessageHeader *) msgbuf;
//check if msglen > 0
GNUNET_assert(msgbuf_size > 0);
}
}
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "wlan_plugin_send got %u bytes data, packet says it has %u bytes for %.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n",
- msgbuf_size, ntohs(innermsg->size), session->addr[0], session->addr[1],
- session->addr[2], session->addr[3], session->addr[4], session->addr[5]);
-#endif
-
//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"
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\n",
- GNUNET_TIME_absolute_get_remaining(newmsg->timeout).rel_value);
- return -1;
+ "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->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
+/**
+ * function to get the first message in the fragement queue (out) of a session
+ * @param session pointer to the session
+ * @return pointer to the struct FragmentMessage
+ */
static struct FragmentMessage *
get_fragment_message_from_session(struct Session * session)
{
return NULL;
}
+/**
+ * function to get the message in the fragement queue (out) of a session with a specific id
+ * @param session pointer to the session
+ * @param message_id id of the message
+ * @return pointer to the struct FragmentMessage
+ */
+static struct FragmentMessage *
+get_fragment_message_from_session_and_id(struct Session * session,
+ uint32_t message_id)
+{
+ struct FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
+ while (fm != NULL)
+ {
+ if ((fm->session == session) && (fm->message_id_out == message_id))
+ {
+ return fm;
+ }
+ fm = fm->next;
+ }
+ return NULL;
+}
+
/**
* Function that can be used to force the plugin to disconnect
* from the given peer and cancel all previous transmissions
struct Sessionqueue * pendingsession = plugin->pending_Sessions;
struct PendingMessage * pm = NULL;
struct FragmentMessage * fm;
+ struct Receive_Message_Queue * receive_queue;
// just look at all the session for the needed one
while (queue != NULL)
//is something of this session in the fragment queue?
fm = get_fragment_message_from_session(queue->content);
- free_fragment_message(plugin, fm);
+ while (fm != NULL)
+ {
+ free_fragment_message(plugin, fm);
+ fm = get_fragment_message_from_session(queue->content);
+ }
+ check_next_fragment_timeout(plugin);
//dispose all received fragments
- free_rec_frag_queue(queue->content);
+ 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;
return;
}
input = (const unsigned char*) addr;
- GNUNET_snprintf(ret, sizeof(ret), "%s Mac-Address %.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
- PROTOCOL_PREFIX, input[0], input[1], input[2], input[3], input[4],
- input[5]);
+ 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);
}
* @return string representing the same address
*/
static const char*
-wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen)
+wlan_plugin_address_to_string (void *cls,
+ const void *addr,
+ size_t addrlen)
{
static char ret[40];
- const unsigned char * input;
+ const struct MacAddress *mac;
- //GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ if (addrlen != sizeof (struct MacAddress))
{
- /* invalid address (MAC addresses have 6 bytes) */
GNUNET_break (0);
return NULL;
}
- input = (const unsigned char*) addr;
- GNUNET_snprintf(ret, sizeof(ret), "%s Mac-Address %.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
- PROTOCOL_PREFIX, input[0], input[1], input[2], input[3], input[4],
- input[5]);
+ mac = addr;
+ GNUNET_snprintf(ret, sizeof(ret),
+ "%s Mac-Address %X:%X:%X:%X:%X:%X",
+ PROTOCOL_PREFIX,
+ mac->mac[0], mac->mac[1],
+ mac->mac[2], mac->mac[3],
+ mac->mac[4], mac->mac[5]);
return ret;
}
+/**
+ * function to check if bitfield is representation of fragments of the message
+ * @param rec_message message to check
+ */
+
+void
+check_message_fragment_bitfield(struct Receive_Message_Queue * rec_message)
+{
+ uint64_t checkfragments = 0;
+ struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
+
+ while (rec_queue != NULL)
+ {
+ setBit((char*) &checkfragments, rec_queue->num);
+ rec_queue = rec_queue->next;
+
+ }
+ GNUNET_assert(checkfragments == rec_message->received_fragments);
+}
+
/**
* Function to test if fragment number already exists in the fragments received
*
- * @param session session the fragment belongs to
+ * @param rec_message message this fragment belongs to
* @param fh Fragmentheader of the fragment
* @return GNUNET_YES if fragment exists already, GNUNET_NO if it does not exists in the queue of the session
*/
static const int
-is_double_msg(struct Session * session, struct FragmentationHeader * fh)
+is_double_msg(struct Receive_Message_Queue * rec_message,
+ struct FragmentationHeader * fh)
{
- struct RecQueue * rec_queue = session->frag_head;
- while (rec_queue != NULL)
- {
- if (rec_queue->num == fh->fragment_off_or_num)
- {
- return GNUNET_YES;
- }
- rec_queue = rec_queue->next;
+ //test if bitfield is okay
+#if DEBUG_wlan
+ check_message_fragment_bitfield(rec_message);
+#endif
+
+ return testBit((char *) &rec_message->received_fragments, ntohs(
+ fh->fragment_off_or_num));
- }
- return GNUNET_NO;
}
/**
- * Function to insert a fragment in a queue of a session
+ * Function to insert a fragment in a queue of a message
* @param session session the fragment belongs to
* @param rec_queue fragment to add
*/
static void
-insert_fragment_in_queue(struct Session * session, struct RecQueue * rec_queue)
+insert_fragment_in_queue(struct Receive_Message_Queue * rec_message,
+ struct Receive_Fragment_Queue * rec_queue)
{
- struct RecQueue * rec_queue2 = session->frag_head;
+ struct Receive_Fragment_Queue * rec_queue2 = rec_message->frag_head;
struct WlanHeader * wlanheader = NULL;
- //first received fragment of message
- if (session->rec_size == NO_MESSAGE_OR_MESSAGE_FINISHED)
- {
- session->rec_size = MESSAGE_LENGHT_UNKNOWN;
- }
+
+ GNUNET_assert(rec_message != NULL);
+ GNUNET_assert(rec_queue != NULL);
+
//this is the first fragment of the message (fragment id 0)
if (rec_queue->num == 0)
{
wlanheader = (struct WlanHeader *) rec_queue->msg;
- session->rec_size = ntohs(wlanheader->header.size);
+ rec_message->rec_size = ntohs(wlanheader->header.size);
}
//sort into list
if (rec_queue2->num > rec_queue->num)
{
//next element number is grater than the current num
- GNUNET_CONTAINER_DLL_insert_before(session->frag_head, session->frag_tail, rec_queue2, rec_queue);
+ GNUNET_CONTAINER_DLL_insert_before(rec_message->frag_head, rec_message->frag_tail, rec_queue2, rec_queue);
+ setBit((char *) &rec_message->received_fragments, rec_queue->num);
return;
}
rec_queue = rec_queue->next;
}
//no element has a grater number
- GNUNET_CONTAINER_DLL_insert_tail(session->frag_head, session->frag_tail, rec_queue);
+ GNUNET_CONTAINER_DLL_insert_tail(rec_message->frag_head, rec_message->frag_tail, rec_queue);
+
+ setBit((char *) &rec_message->received_fragments, rec_queue->num);
}
/**
- * Function to dispose the fragments received for a message
- * @param session session to free the fragments from
+ * 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_rec_frag_queue(struct Session * session)
+free_receive_message(struct Plugin* plugin,
+ struct Receive_Message_Queue * rec_message)
{
- struct RecQueue * rec_queue = session->frag_head;
- struct RecQueue * rec_queue2;
+ GNUNET_assert(rec_message !=NULL);
+ struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
+ struct Receive_Fragment_Queue * rec_queue2;
+
while (rec_queue != NULL)
{
rec_queue2 = rec_queue;
rec_queue = rec_queue->next;
GNUNET_free(rec_queue2);
}
- session->frag_head = NULL;
- session->frag_tail = NULL;
- session->rec_size = NO_MESSAGE_OR_MESSAGE_FINISHED;
+
+ GNUNET_CONTAINER_DLL_remove(plugin->receive_messages_head,plugin->receive_messages_teil, rec_message);
+
+ GNUNET_assert(plugin->pending_receive_messages > 0);
+ GNUNET_assert(rec_message->session->fragment_messages_in_count > 0);
+
+ plugin->pending_receive_messages--;
+ rec_message->session->fragment_messages_in_count--;
+ GNUNET_free(rec_message);
}
/**
* @param plugin the plugin handle
* @param session_light information of the message sender
* @param session session the message belongs to
+ * @param rec_message pointer to the message that should be checked
*/
static void
check_rec_finished_msg(struct Plugin* plugin,
- struct Session_light * session_light, struct Session * session)
+ struct Session_light * session_light, struct Session * session,
+ struct Receive_Message_Queue * rec_message)
{
- struct RecQueue * rec_queue = session->frag_head;
- int packetsize = session->rec_size;
+ struct Receive_Fragment_Queue * rec_queue = rec_message->frag_head;
+ int packetsize = rec_message->rec_size;
int sum = 0;
int aktnum = 0;
+ uint64_t bitfield = 0;
char * msg;
- //some fragment should be received
- GNUNET_assert(session->rec_size != NO_MESSAGE_OR_MESSAGE_FINISHED);
+
+ GNUNET_assert(rec_message !=NULL);
//check if first fragment is present
- if (session->rec_size == MESSAGE_LENGHT_UNKNOWN)
+ if (packetsize == 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 DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "check_rec_finished_msg: A message for %p is complete\n", session);
+ check_message_fragment_bitfield(rec_message);
#endif
- //copy fragments together
- msg = GNUNET_malloc(packetsize);
- rec_queue = session->frag_head;
- aktnum = 0;
+ bitfield = ~bitfield;
+ bitfield = bitfield >> (63 - rec_message->frag_tail->num);
+ if (rec_message->received_fragments == bitfield)
+ {
+
while (rec_queue != NULL)
{
- //TODO SAVE SOME COPY OPS AND CHECK CRC WITHOUT COPY
- memcpy(msg + aktnum, rec_queue->msg, rec_queue->size);
- aktnum += rec_queue->size;
+ sum += rec_queue->size;
rec_queue = rec_queue->next;
}
- free_rec_frag_queue(session);
- //call wlan_process_helper to process the message
- wlan_data_massage_handler(plugin, session_light,
- (struct GNUNET_MessageHeader*) msg);
- //wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
+ //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
- GNUNET_free(msg);
+ //TODO use mst
+ //copy fragments together
+ msg = GNUNET_malloc(packetsize);
+ rec_queue = rec_message->frag_head;
+ aktnum = 0;
+ while (rec_queue != NULL)
+ {
+ //TODO SAVE SOME COPY OPS AND CHECK CRC WITHOUT COPY
+ memcpy(msg + aktnum, rec_queue->msg, rec_queue->size);
+ aktnum += rec_queue->size;
+ rec_queue = rec_queue->next;
+ }
+ free_receive_message(plugin, rec_message);
+ //call wlan_process_helper to process the message
+ wlan_data_massage_handler(plugin, session_light,
+ (struct GNUNET_MessageHeader*) msg);
+ //wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
+
+ GNUNET_free(msg);
+ }
}
}
static void
-process_data(void *cls, void *client,
- const struct GNUNET_MessageHeader *hdr){
+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 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[1].value = htonl(0);
#if DEBUG_wlan
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Calling plugin->env->receive for session %p; %s\n", session,
- wlan_plugin_address_to_string(NULL, session->addr, 6));
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Calling plugin->env->receive for session %p; %s\n", session,
+ wlan_plugin_address_to_string(NULL, session->addr, 6));
#endif
plugin->env->receive(plugin->env->cls, &(session->target), hdr,
- (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2,
- session, session->addr, sizeof(session->addr));
+ (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2, session,
+ session->addr, sizeof(session->addr));
}
/**
//"receive" the message
- GNUNET_SERVER_mst_receive(plugin->data_tokenizer, session, (const char *) temp_hdr,
+ GNUNET_SERVER_mst_receive(plugin->data_tokenizer, session,
+ (const char *) temp_hdr,
ntohs(hdr->size) - sizeof(struct WlanHeader), GNUNET_YES, GNUNET_NO);
-
return;
}
else
* function to add an ack to send it for a received fragment
* @param plugin pointer to the global plugin structure
* @param session pointer to the session this ack belongs to
+ * @param bitfield bitfield to send
* @param fh pointer to the fragmentation header which we would like to acknolage
*/
void
add_ack_for_send(struct Plugin * plugin, struct Session * session,
- struct FragmentationHeader * fh)
+ uint64_t bitfield, struct FragmentationHeader * fh)
{
struct AckSendQueue * ack;
GNUNET_assert(fh != NULL);
ack = GNUNET_malloc(sizeof(struct AckSendQueue));
- ack->fragment_off_or_num = ntohs(fh->fragment_off_or_num);
+ ack->fragments_field = bitfield;
ack->message_id = ntohl(fh->message_id);
ack->session = session;
}
+/**
+ * function to get the receive message from the message id and the session
+ * @param plugin pointer to the plugin struct
+ * @param session session this fragment belongs to
+ * @param message_id id of the message
+ */
+
+struct Receive_Message_Queue *
+get_receive_message(struct Plugin * plugin, struct Session * session,
+ uint32_t message_id)
+{
+ struct Receive_Message_Queue * rec_message = plugin->receive_messages_head;
+ while (rec_message != NULL)
+ {
+ if ((rec_message->message_id_in == message_id) && (rec_message->session
+ == session))
+ {
+ return rec_message;
+ }
+ rec_message = rec_message->next;
+ }
+ return NULL;
+}
+
+/**
+ * function to get the receive message of a session
+ * @param plugin pointer to the plugin struct
+ * @param session session this fragment belongs to
+ */
+
+struct Receive_Message_Queue *
+get_receive_message_from_session(struct Plugin * plugin,
+ struct Session * session)
+{
+ struct Receive_Message_Queue * rec_message = plugin->receive_messages_head;
+ while (rec_message != NULL)
+ {
+ if (rec_message->session == session)
+ {
+ return rec_message;
+ }
+ rec_message = rec_message->next;
+ }
+ return NULL;
+}
+
+/**
+ * function to insert a received fragment into the right fragment queue of the right message
+ * @param plugin pointer to the plugin struct
+ * @param session_light pointer to the session_light struct of this message
+ * @param session session this fragment belongs to
+ * @param fh pointer to the header of the fragment
+ * @return new fragment bitfield for the message
+ */
+
+uint64_t
+insert_fragment_in_in_message_queue(struct Plugin * plugin,
+ struct Session_light * session_light, struct Session * session,
+ struct FragmentationHeader * fh)
+{
+ struct Receive_Fragment_Queue * rec_queue = NULL;
+ struct Receive_Message_Queue * rec_message;
+ const char * tempmsg = (char*) &fh[1];
+ uint64_t retval = 0;
+
+ //TODO fragments do not timeout
+ //check if message_id is right or it is a new msg
+ GNUNET_assert(fh != NULL);
+
+ rec_message = get_receive_message(plugin, session, ntohs(fh->message_id));
+
+ if (rec_message == NULL)
+ {
+ if (session->fragment_messages_in_count < MESSAGES_IN_QUEUE_PER_SESSION)
+ {
+
+ //new message incoming
+ rec_message = GNUNET_malloc(sizeof (struct Receive_Message_Queue));
+ rec_message->message_id_in = ntohs(fh->message_id);
+ rec_message->rec_size = MESSAGE_LENGHT_UNKNOWN;
+ rec_message->session = session;
+ rec_message->timeout = GNUNET_TIME_absolute_add(
+ GNUNET_TIME_absolute_get(), MESSAGE_IN_TIMEOUT);
+ rec_message->received_fragments = 0;
+
+ GNUNET_CONTAINER_DLL_insert(plugin->receive_messages_head, plugin->receive_messages_teil, rec_message);
+
+ session->fragment_messages_in_count++;
+ plugin->pending_receive_messages++;
+
+#if DEBUG_wlan
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "New fragmented message started: message id %u, messages in for this session %u, messages in %u\n",
+ rec_message->message_id_in, session->fragment_messages_in_count,
+ plugin->pending_receive_messages);
+#endif
+ }
+ else
+ {
+
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_INFO,
+ "WLAN fragment message_id and session message_id do not exist, max MESSAGES_IN_QUEUE_PER_SESSION reached\n");
+ setBit((char *) &retval, ntohs(fh->fragment_off_or_num));
+ return retval;
+ }
+ }
+
+ if (is_double_msg(rec_message, fh) != GNUNET_YES)
+ {
+
+ //report size
+ rec_queue = GNUNET_malloc(sizeof (struct Receive_Fragment_Queue) +
+ ntohs(fh->header.size) - sizeof(struct FragmentationHeader));
+ rec_queue->size = ntohs(fh->header.size)
+ - sizeof(struct FragmentationHeader);
+ rec_queue->num = ntohs(fh->fragment_off_or_num);
+ rec_queue->msg = (char*) &(rec_queue[1]);
+ //copy msg to buffer
+ memcpy((char *) rec_queue->msg, tempmsg, rec_queue->size);
+ insert_fragment_in_queue(rec_message, rec_queue);
+ //save bitfield
+ retval = rec_message->received_fragments;
+
+#if DEBUG_wlan
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "New fragment: size %u, fragsize %u, message id %u, bitfield %X, session %u\n",
+ rec_message->rec_size, rec_queue->size,
+ rec_message->received_fragments, rec_message->message_id_in, session);
+#endif
+
+ check_rec_finished_msg(plugin, session_light, session, rec_message);
+ }
+ else
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN fragment is a clone\n");
+ retval = rec_message->received_fragments;
+
+ }
+ return retval;
+
+}
+
/**
* Function used for to process the data received from the wlan interface
*
struct Session * session = NULL;
struct FragmentationHeader * fh = NULL;
+ struct FragmentationAckHeader * fah = NULL;
struct FragmentMessage * fm = NULL;
const char * tempmsg = NULL;
- struct AckQueue * ack = NULL;
- struct AckQueue * ack2 = NULL;
+ uint64_t fragment_bitfield = 0;
- struct RecQueue * rec_queue = NULL;
//ADVERTISEMENT
if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT)
{
GNUNET_log(
GNUNET_ERROR_TYPE_DEBUG,
"Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT size: %u; %s\n",
- ntohs(hdr->size), wlan_plugin_address_to_string(NULL,session_light->addr, 6));
+ ntohs(hdr->size), wlan_plugin_address_to_string(NULL,
+ session_light->addr, 6));
#endif
if (session_light->session == NULL)
GNUNET_ERROR_TYPE_DEBUG,
"Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT with message_id %u with fragment number %i, size: %u; %s\n",
ntohl(fh->message_id), ntohs(fh->fragment_off_or_num), ntohs(
- hdr->size), wlan_plugin_address_to_string(NULL,session_light->addr, 6));
+ hdr->size), wlan_plugin_address_to_string(NULL,
+ session_light->addr, 6));
#endif
if (getcrc16(tempmsg, ntohs(fh->header.size)) != ntohs(fh->message_crc))
//if in the session list
if (session != NULL)
{
- //TODO fragments do not timeout
- //check if message_id is right 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)
- {
- //report size
- //TODO ask if it is right like this
- if (plugin->env->traffic_report != NULL)
- {
- plugin->env->traffic_report(plugin->env->cls,
- &session->target, ntohs(fh->header.size));
- }
- 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");
-
- }
- }
- 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");
-
- }
+ fragment_bitfield = insert_fragment_in_in_message_queue(plugin,
+ session_light, session, fh);
}
else
{
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN client not in session list\n");
+ // new session
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_INFO,
+ "WLAN client not in session list, fragment num %u, message id %u\n",
+ ntohs(fh->fragment_off_or_num), ntohs(fh->message_id));
wlan_data_massage_handler(plugin, session_light,
(struct GNUNET_MessageHeader *) tempmsg);
session = session_light->session;
{
return;
}
+ setBit((char *) &fragment_bitfield, ntohs(fh->fragment_off_or_num));
}
- //TODO make and send ack
- add_ack_for_send(plugin, session, fh);
+ add_ack_for_send(plugin, session, fragment_bitfield, fh);
check_next_fragment_timeout(plugin);
}
GNUNET_log(
GNUNET_ERROR_TYPE_DEBUG,
"Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK size: %u; %s\n",
- ntohs(hdr->size), wlan_plugin_address_to_string(NULL,session_light->addr, 6));
+ ntohs(hdr->size), wlan_plugin_address_to_string(NULL,
+ session_light->addr, 6));
#endif
GNUNET_assert(session_light != NULL);
GNUNET_assert(session_light->session != NULL);
}
session = session_light->session;
- fh = (struct FragmentationHeader *) hdr;
- if (session->message_id_out == ntohl(fh->message_id))
+ fah = (struct FragmentationAckHeader *) hdr;
+ fm = get_fragment_message_from_session_and_id(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 != ntohs(fh->fragment_off_or_num))
- {
- // check if next ack has bigger number
- if (ack2->fragment_num > ntohs(fh->fragment_off_or_num))
- {
- ack = GNUNET_malloc(sizeof(struct AckQueue));
- ack->fragment_num = ntohs(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
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "WLAN got double ack for message id %u and fragment num %u\n",
- session->message_id_out, ack2->fragment_num);
-#endif
- return;
- }
- ack2 = ack2->next;
- }
-
- //all acks are have smaller numbers
- ack = GNUNET_malloc(sizeof(struct AckQueue));
- ack->fragment_num = ntohs(fh->fragment_off_or_num);
- GNUNET_CONTAINER_DLL_insert_tail(fm->head,fm->tail,ack);
- check_finished_fragment(plugin, fm);
- }
- else
- {
- GNUNET_log(
- GNUNET_ERROR_TYPE_WARNING,
- "WLAN fragment not in fragment list but id %u of ack is right\n",
- ntohl(fh->message_id));
- return;
- }
+ fm->ack_bitfield = fm->ack_bitfield | ntohll(fah->fragment_field);
+ check_finished_fragment(plugin, fm);
}
else
{
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- _("WLAN got ack but session->message_id_out %u and fragment id %u mismatch\n"),
- session->message_id_out, ntohl(fh->message_id));
-#endif
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
+ "WLAN fragment not in fragment list with id %u of ack\n", ntohl(
+ fh->message_id));
+ return;
}
}
}
+
+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 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;
const struct GNUNET_MessageHeader * temp_hdr = NULL;
int datasize = 0;
int pos = 0;
- 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: %u\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
- GNUNET_assert(ntohs(hdr->size) >= sizeof(struct IeeeHeader) + sizeof(struct GNUNET_MessageHeader));
- wlanIeeeHeader = (struct IeeeHeader *) &hdr[1];
+ if (ntohs(hdr->size) < sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader))
+ {
+ GNUNET_break (0);
+ /* FIXME: restart SUID process */
+ return;
+ }
+ wlanIeeeHeader = (struct ieee80211_frame *) &hdr[1];
//process only if it is an broadcast or for this computer both with the gnunet bssid
//check for bssid
- if (memcmp(&(wlanIeeeHeader->mac2), macbc, sizeof(struct MacAddress))
- == 0)
+ if (memcmp(&(wlanIeeeHeader->i_addr3), mac_bssid,
+ sizeof(struct MacAddress)) == 0)
{
//check for broadcast or mac
- if (memcmp(&(wlanIeeeHeader->mac1), bc_all_mac,
+ if (memcmp(&(wlanIeeeHeader->i_addr1), bc_all_mac,
sizeof(struct MacAddress) == 0) || memcmp(
- &(wlanIeeeHeader->mac1), &(plugin->mac_address),
+ &(wlanIeeeHeader->i_addr1), &(plugin->mac_address),
sizeof(struct MacAddress)) == 0)
{
// process the inner data
- datasize = ntohs(hdr->size) - sizeof(struct IeeeHeader)
+ datasize = ntohs(hdr->size) - sizeof(struct ieee80211_frame)
- sizeof(struct GNUNET_MessageHeader);
session_light = GNUNET_malloc(sizeof(struct Session_light));
- memcpy(session_light->addr, &(wlanIeeeHeader->mac3),
+ memcpy(session_light->addr, &(wlanIeeeHeader->i_addr2),
sizeof(struct MacAddress));
//session_light->session = search_session(plugin,session_light->addr);
{
#if DEBUG_wlan
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got wrong MAC: %s\n",
- wlanIeeeHeader->mac1);
+ "Func wlan_process_helper got wrong MAC: %s\n", macprinter(
+ wlanIeeeHeader->i_addr1));
#endif
}
}
{
#if DEBUG_wlan
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got wrong BSSID: %s\n",
- wlanIeeeHeader->mac2);
+ "Func wlan_process_helper got wrong BSSID: %s\n", macprinter(
+ wlanIeeeHeader->i_addr2));
#endif
}
-
-
-
- }
-
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL)
- {
-
-#if DEBUG_wlan
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Func wlan_process_helper got GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL size: %u\n",
- ntohs(hdr->size));
-#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))
- {
- //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
+ if (ntohs(hdr->size) != sizeof(struct Wlan_Helper_Control_Message))
{
- 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");
+ 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;
}
}
+
/**
* We have been notified that wlan-helper has written something to stdout.
* Handle the output, then reschedule this function to be called again once
* @param cls the plugin handle
* @param tc the scheduling context
*/
-
static void
wlan_plugin_helper_read(void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
#endif
return;
}
- GNUNET_SERVER_mst_receive(plugin->suid_tokenizer, 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_SERVER_mst_destroy(plugin->suid_tokenizer);
if (plugin->data_tokenizer != NULL)
- GNUNET_SERVER_mst_destroy(plugin->data_tokenizer);
-
+ GNUNET_SERVER_mst_destroy(plugin->data_tokenizer);
GNUNET_free_non_null(plugin->interface);
GNUNET_free (plugin);
}
wlan_transport_start_wlan_helper(plugin, testmode);
- plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper, plugin);
+ plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper,
+ plugin);
plugin->data_tokenizer = GNUNET_SERVER_mst_create(&process_data, plugin);
projects / oweals / gnunet.git / blobdiff