*/
struct Sessionqueue *sessions_tail;
+ /**
+ * Number of sessions
+ */
+
+ int session_count;
+
/**
* encapsulation to the local wlan server prog
*/
const struct GNUNET_DISK_FileHandle *server_stdin_handle;
/**
- * ID of select gnunet-nat-server std read task
+ * ID of the gnunet-wlan-server std read task
*/
GNUNET_SCHEDULER_TaskIdentifier server_read_task;
/**
- * ID of select gnunet-nat-server std read task
- */
+ * ID of the gnunet-wlan-server std read task
+ */
GNUNET_SCHEDULER_TaskIdentifier server_write_task;
/**
- * The process id of the server process (if behind NAT)
+ * ID of the delay task for writing
+ */
+ GNUNET_SCHEDULER_TaskIdentifier server_write_delay_task;
+
+ /**
+ * The process id of the wlan process
*/
struct GNUNET_OS_Process *server_proc;
unsigned int pending_fragment_messages;
+ /**
+ * time of the next "hello-beacon"
+ */
+
+ struct GNUNET_TIME_Absolute beacon_time;
+
};
-//TODO doxigen
+/**
+ * Queue of sessions, for the general session queue and the pending session queue
+ */
struct Sessionqueue
{
struct Session * content;
};
-//TODO doxigen
+/**
+ * Queue of ack received for messages send
+ */
struct AckQueue
{
struct AckQueue * next;
struct AckQueue * prev;
- int fragment_num;
+ int fragment_num; //TODO change it to offset
+};
+
+/**
+ * Queue for the fragments received
+ */
+
+struct RecQueue
+{
+ struct RecQueue * next;
+ struct RecQueue * prev;
+ uint16_t num;
+ char * msg;
+ uint16_t size;
};
/**
};
+/**
+ * Session infos gathered from a messages
+ */
+
+struct Session_light
+{
+ /**
+ * the session this message belongs to
+ */
+ struct Session * session;
+ /**
+ * peer mac address
+ */
+ uint8_t addr[6];
+};
+
/**
* Session handle for connections.
*/
struct GNUNET_PeerIdentity target;
/**
- * encapsulation of the data
+ * 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, -1 means that the size is not known, -2 means no message received
*/
- //struct GNUNET_SERVER_MessageStreamTokenizer * datatoken;
+
+ int rec_size;
+
+ /**
+ * Sorted queue with the fragments received; head
+ */
+
+ struct RecQueue * frag_head;
+
+ /**
+ * Sorted queue with the fragments received; tail
+ */
+
+ struct RecQueue * frag_tail;
/**
* peer mac address
//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);
-static void check_fragment_queue (struct Plugin * plugin);
+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);
+
+static void
+check_fragment_queue(struct Plugin * plugin);
+
+uint32_t
+getcrc32(const char *msgbuf, size_t msgbuf_size);
/**
* get the next message number, at the moment just a random one
uint32_t
get_next_message_id()
{
- return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
+ return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
}
/**
void
start_next_message_id()
{
- //GNUNET_CRYPTO_random_init;
+ //GNUNET_CRYPTO_random_init;
}
-
/**
- * get Session from address
+ * search for a session with the addr
*
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the mac address of the peer
+ * @return returns the session
*/
-//TODO doxigen
-//TODO add other possibilities to find the right session (are there other?)
+
static struct Session *
-get_Session (struct Plugin *plugin,
- const char * addr)
+search_session(struct Plugin *plugin, const uint8_t * addr)
{
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * lastitem = NULL;
+ 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;
+ queue = queue->next;
+ }
+ return 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;
- queue = queue->next;
- }
- // new session
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+/**
+ * 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
+ */
- GNUNET_CONTAINER_DLL_insert(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 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);
+static struct Session *
+create_session(struct Plugin *plugin,const uint8_t * addr)
+{
+ struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue));
- check_fragment_queue(plugin);
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->sessions, plugin->sessions_tail, queue);
- return queue->content;
+ 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 = -2;
+ plugin->session_count++;
+ return queue->content;
+}
+
+/**
+ * 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)
+{
+ struct Session * session = search_session(plugin, addr);
+ if (session != NULL)
+ {
+ return session;
+ }
+ // new session
+ return create_session(plugin, addr);
+
+ /* -- not needed, layer above already has it--
+ //queue welcome message for new sessions, not realy needed
+ //struct WelcomeMessage welcome;
+ struct PendingMessage *pm;
+ pm = GNUNET_malloc (sizeof (struct PendingMessage));
+ pm->msg = GNUNET_malloc(GNUNET_HELLO_size(* (plugin->env->our_hello)));
+ pm->message_size = GNUNET_HELLO_size(* (plugin->env->our_hello));
+ //welcome.header.size = htons (GNUNET_HELLO_size(* (plugin->env->our_hello)));
+ //welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
+ //welcome.clientIdentity = *plugin->env->my_identity;
+ memcpy ( (pm->msg), * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello)));
+ pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
+ queue->content->pending_message = pm;
+ plugin->pendingsessions ++;
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions, plugin->pending_Sessions_tail, queue);
+
+ check_fragment_queue(plugin);
+ */
}
/**
//TODO doxigen
static void
-free_acks (struct FragmentMessage * pm){
+free_acks (struct FragmentMessage * fm){
struct AckQueue * fq;
- while (pm->head != NULL){
- fq = pm->head;
- GNUNET_CONTAINER_DLL_remove(pm->head, pm->tail, fq);
+ while (fm->head != NULL){
+ fq = fm->head;
+ GNUNET_CONTAINER_DLL_remove(fm->head, fm->tail, fq);
GNUNET_free(fq);
}
}
//TODO doxigen
+/**
+ * Function to schedule the write task, executed after a delay
+ */
+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)
+ return;
+
+ // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
+ if (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK)
+ {
+ plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
+ GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
+ &do_transmit, plugin);
+ }
+}
+
+//TODO doxigen
+/**
+ * Function to calculate the time of the next periodic "hello-beacon"
+ */
static void
-delay_fragment_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc){
- struct Plugin * plugin = cls;
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
-
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
- plugin->server_write_task
- = GNUNET_SCHEDULER_add_write_file(GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdin_handle,
- &do_transmit,
- plugin);
+set_next_beacon_time(struct Plugin * const plugin)
+{
+ //under 10 known peers: once a second
+ if (plugin->session_count < 10)
+ {
+ plugin->beacon_time = GNUNET_TIME_absolute_add(
+ GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_SECONDS);
+ }
+ //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));
+ }
+ //over 30 known peers: once a minute
+ else
+ {
+ plugin->beacon_time = GNUNET_TIME_absolute_add(
+ GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_MINUTES);
+ }
}
//TODO doxigen
struct GNUNET_TIME_Relative
-get_next_frag_timeout (struct FragmentMessage * fm)
+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));
+ return GNUNET_TIME_relative_min(GNUNET_TIME_absolute_get_remaining(
+ fm->next_ack), GNUNET_TIME_absolute_get_remaining(fm->timeout));
}
//TODO doxigen
* Function to set the timer for the next timeout of the fragment queue
*/
static void
-check_next_fragment_timeout (struct Plugin * plugin){
- struct FragmentMessage * fm;
- if (plugin->server_write_task != GNUNET_SCHEDULER_NO_TASK){
- GNUNET_SCHEDULER_cancel(plugin->server_write_task);
- }
- fm = plugin->pending_Fragment_Messages_head;
- if (fm != NULL){
- plugin->server_write_task = GNUNET_SCHEDULER_add_delayed(get_next_frag_timeout(fm), &delay_fragment_task, plugin);
- }
+check_next_fragment_timeout(struct Plugin * const plugin)
+{
+ 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)
+ {
+ GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
+ }
+ fm = plugin->pending_Fragment_Messages_head;
+
+ GNUNET_assert(plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK);
+
+ //check if there are some fragments in the queue
+ 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);
}
+
+
//TODO doxigen
/**
* Function to get the next queued Session, removes the session from the queue
plugin->pending_Fragment_Messages_tail,fm2,fm);
}
+//TODO doxigen
+static void
+free_fragment_message(struct Plugin * plugin,struct FragmentMessage * fm)
+{
+ if (fm != NULL)
+ {
+ free_acks(fm);
+ 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);
+ }
+}
+
//TODO doxigen
/**
* Function to check if there is some space in the fragment queue
}
}
+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)
+ {
+ 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);
+
+
+ }
+}
+
/**
* Function called to when wlan helper is ready to get some data
*
if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
return;
- struct Session * session;
- struct FragmentMessage * fm;
- struct IeeeHeader * wlanheader;
- struct RadiotapHeader * radioHeader;
- struct GNUNET_MessageHeader * msgheader;
+ struct Session * session = NULL;
+ struct FragmentMessage * fm = NULL;
+ struct IeeeHeader * ieeewlanheader = NULL;
+ struct RadiotapHeader * radioHeader = NULL;
+ struct GNUNET_MessageHeader * msgheader = NULL;
+ struct GNUNET_MessageHeader * msgheader2 = NULL;
struct FragmentationHeader fragheader;
uint16_t size = 0;
const char * copystart = NULL;
uint16_t copysize = 0;
uint copyoffset = 0;
struct AckQueue * akt = NULL;
- //int exit = 0;
+
+ //test if a "hello-beacon" has to be send
+ if (GNUNET_TIME_absolute_get_remaining(plugin->beacon_time).rel_value == 0)
+ {
+ //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));
+
+ msgheader = GNUNET_malloc(size);
+ msgheader->size = htons(size - sizeof(struct GNUNET_MessageHeader));
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
+
+ radioHeader = (struct RadiotapHeader *) &msgheader[1];
+ getRadiotapHeader(radioHeader);
+
+ ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
+ getWlanHeader(ieeewlanheader);
+
+ msgheader2 = (struct GNUNET_MessageHeader *) &ieeewlanheader[1];
+ msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello)));
+ 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);
+ GNUNET_assert(bytes == size);
+
+ set_next_beacon_time(plugin);
+ check_next_fragment_timeout(plugin);
+ return;
+
+ }
+
fm = plugin->pending_Fragment_Messages_head;
GNUNET_assert(fm != NULL);
copysize = GNUNET_MIN(fm->message_size - copyoffset,
WLAN_MTU - sizeof(struct FragmentationHeader));
fragheader.header.size = htons(copysize);
- fragheader.header.type = GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT;
+ fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
//get the next missing fragment
+ sizeof(struct GNUNET_MessageHeader);
msgheader = GNUNET_malloc(size);
msgheader->size = htons(size - sizeof(struct GNUNET_MessageHeader));
- msgheader->type = GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA;
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
radioHeader = (struct RadiotapHeader*) &msgheader[1];
getRadiotapHeader(radioHeader);
- wlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(wlanheader);
+ 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(&wlanheader[1],&fragheader, sizeof(struct FragmentationHeader));
- memcpy(&wlanheader[1] + sizeof(struct FragmentationHeader),copystart,copysize);
+ memcpy(&ieeewlanheader[1],&fragheader, sizeof(struct FragmentationHeader));
+ memcpy(&ieeewlanheader[1] + sizeof(struct FragmentationHeader),copystart,copysize);
} else {
- memcpy(&wlanheader[1],copystart,copysize);
+ memcpy(&ieeewlanheader[1],copystart,copysize);
}
bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
GNUNET_assert(msgbuf_size > 0);
//get session if needed
- if (session == NULL) {
- if ( wlan_plugin_address_suggested(plugin , addr, addrlen) == GNUNET_OK){
- session = get_Session(plugin, addr);
- } else {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Wlan Address len %d is wrong\n"),
- addrlen);
- return -1;
- }
- }
+ if (session == NULL)
+ {
+ if (wlan_plugin_address_suggested(plugin, addr, addrlen) == GNUNET_OK)
+ {
+ session = get_Session(plugin, addr);
+ }
+ else
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ _("Wlan Address len %d is wrong\n"), addrlen);
+ return -1;
+ }
+ }
//TODO target "problem" not solved
session->target = *target;
queue_Session(plugin, session);
//queue message in session
- if (session->pending_message == NULL){
- newmsg = GNUNET_malloc(sizeof(struct PendingMessage));
- (newmsg->msg) = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader));
- wlanheader = (struct WlanHeader *) newmsg->msg;
- //copy msg to buffer, not fragmented / segmented yet, but with message header
- wlanheader->header.size = htons(msgbuf_size);
- wlanheader->header.type = GNUNET_MESSAGE_TYPE_WLAN_DATA;
- wlanheader->target = *target;
- wlanheader->crc = getcrc32(msgbuf, msgbuf_size);
- memcpy(&wlanheader[1], msgbuf, msgbuf_size);
- newmsg->transmit_cont = cont;
- newmsg->transmit_cont_cls = cont_cls;
- newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout);
- newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
- } else {
- //TODO if message is send while hello is still pending, other cases should not occur
- }
+ //test if there is no other message in the "queue"
+ GNUNET_assert (session->pending_message == NULL);
+
+ newmsg = GNUNET_malloc(sizeof(struct PendingMessage));
+ (newmsg->msg) = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader));
+ wlanheader = (struct WlanHeader *) newmsg->msg;
+ //copy msg to buffer, not fragmented / segmented yet, but with message header
+ wlanheader->header.size = htons(msgbuf_size);
+ wlanheader->header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_DATA);
+ memcpy(&(wlanheader->target), target, sizeof(struct GNUNET_PeerIdentity));
+ wlanheader->crc = htonl(getcrc32(msgbuf, msgbuf_size));
+ memcpy(&wlanheader[1], msgbuf, msgbuf_size);
+ newmsg->transmit_cont = cont;
+ newmsg->transmit_cont_cls = cont_cls;
+ newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout);
+ newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
+
check_fragment_queue(plugin);
//FIXME not the correct size
return msgbuf_size;
}
-
+static struct FragmentMessage *
+get_fragment_message_from_session(struct Session * session)
+{
+ struct FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
+ while (fm != NULL)
+ {
+ if (fm->session == session)
+ {
+ return fm;
+ }
+ fm = fm->next;
+ }
+ return NULL;
+}
/**
* Function that can be used to force the plugin to disconnect
* @param target peer from which to disconnect
*/
static void
-wlan_plugin_disconnect (void *cls,
- const struct GNUNET_PeerIdentity *target)
+wlan_plugin_disconnect(void *cls, const struct GNUNET_PeerIdentity *target)
{
- struct Plugin *plugin = cls;
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * lastitem = NULL;
- struct PendingMessage * pm;
-
- // just look at all the session for the needed one
- while (queue != NULL){
- // content is never NULL
- GNUNET_assert (queue->content == NULL);
- if (memcmp(target, &(queue->content->target), sizeof(struct GNUNET_PeerIdentity)) == 0)
- {
- // session found
- // remove PendingMessage
- pm = queue->content->pending_message;
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
-
- GNUNET_free(queue->content);
- GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
- GNUNET_free(queue);
+ struct Plugin *plugin = cls;
+ struct Sessionqueue * queue = plugin->sessions;
+ struct Sessionqueue * pendingsession = plugin->pending_Sessions;
+ struct PendingMessage * pm = NULL;
+ struct FragmentMessage * fm;
- return;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
- }
+ // just look at all the session for the needed one
+ while (queue != NULL)
+ {
+ // content is never NULL
+ GNUNET_assert (queue->content == NULL);
+ if (memcmp(target, &(queue->content->target),
+ sizeof(struct GNUNET_PeerIdentity)) == 0)
+ {
+ //session found
+ //is this session pending for send
+ while (pendingsession != NULL)
+ {
+ if (pendingsession->content == queue->content)
+ {
+ plugin->pendingsessions --;
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
+ plugin->pending_Sessions_tail, pendingsession);
+ GNUNET_free(pendingsession);
+ break;
+ }
+ pendingsession = pendingsession->next;
+ }
+
+ //is something of this session in the fragment queue?
+ fm = get_fragment_message_from_session(queue->content);
+ free_fragment_message(plugin,fm);
+
+
+ // remove PendingMessage
+ pm = queue->content->pending_message;
+ GNUNET_free(pm->msg);
+ GNUNET_free(pm);
+
+ GNUNET_free(queue->content);
+ GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
+ GNUNET_free(queue);
+ plugin->session_count --;
+
+ return;
+ }
+ // try next
+ queue = queue->next;
+ }
}
+
/**
* Function used for to process the data from the suid process
*/
const struct GNUNET_MessageHeader *hdr)
{
struct Plugin *plugin = cls;
- if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA){
- //TODO DATA
- } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT){
- //TODO ADV
- } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL){
- //TODO Control
- if (hdr->size == 6){
- plugin->mac_address = GNUNET_malloc(6);
- memcpy(plugin->mac_address, &hdr[1],6);
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Notifying transport of address %s\n", wlan_plugin_address_to_string(cls, plugin->mac_address, hdr->size));
- plugin->env->notify_address (plugin->env->cls,
- "wlan",
- &plugin->mac_address, sizeof(plugin->mac_address),
- GNUNET_TIME_UNIT_FOREVER_REL);
- } else {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Wrong wlan mac address %s\n", plugin->mac_address);
+ struct IeeeHeader * wlanIeeeHeader = NULL;
+ struct Session * session = NULL;
+ struct WlanHeader * wlanheader = NULL;
+ struct FragmentationHeader * fh = NULL;
+ struct FragmentMessage * fm = NULL;
+ const struct GNUNET_MessageHeader * temp_hdr = NULL;
+ const char * tempmsg = NULL;
+ struct Session_light * session_light;
+ struct AckQueue * ack;
+ struct AckQueue * ack2;
+ int pos = 0;
+
+
+ if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA)
+ {
+ //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];
+
+ session_light = GNUNET_malloc(sizeof(struct Session_light));
+ memcpy(session_light->addr, wlanIeeeHeader->mac3, 6);
+ session_light->session = search_session(plugin, session_light->addr);
+
+ //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(macbc)))
+ {
+ //check for broadcast or mac
+ if (memcmp(wlanIeeeHeader->mac1, bc_all_mac, sizeof(bc_all_mac))
+ || memcmp(wlanIeeeHeader->mac1, plugin->mac_address,
+ sizeof(plugin->mac_address)))
+ {
+ // process the inner data
+ pos = 0;
+ temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1];
+ while (pos < hdr->size)
+ {
+ wlan_process_helper(plugin, &session_light,
+ temp_hdr);
+ pos += temp_hdr->size + sizeof(struct GNUNET_MessageHeader);
+ }
+ }
+ }
+
}
- } else {
- // TODO Wrong data?
- }
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT)
+ {
+ //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);
+ }
+ GNUNET_assert(GNUNET_HELLO_get_id(
+ (const struct GNUNET_HELLO_Message *) &hdr[1],
+ &(session_light->session->target) ) != GNUNET_SYSERR);
+
+ }
+
+
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ {
+ GNUNET_assert(client != NULL);
+ session_light = (struct Session_light *) client;
+ if (session_light->session == NULL){
+ session_light->session = search_session(plugin, session_light->addr);
+ }
+ session = session_light->session;
+ wlanheader =(struct WlanHeader *) &hdr[1];
+ 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 not in session list
+ if (session == NULL){
+
+ //try if it is a hello message
+ if (ntohs(temp_hdr->type) == GNUNET_MESSAGE_TYPE_HELLO){
+ 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;
+ }
+ }
+ //"receive" the message
+ plugin->env->receive(plugin, &session->target,
+ temp_hdr, 1, session, session->addr, sizeof(session->addr));
+ }
+
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT)
+ {
+ GNUNET_assert(client != NULL);
+ session_light = (struct Session_light *) client;
+ if (session_light->session == NULL)
+ {
+ session_light->session = search_session(plugin, session_light->addr);
+ }
+ session = session_light->session;
+
+ fh = (struct FragmentationHeader *) &hdr[1];
+ tempmsg = (char*) &fh[1];
+
+ //if not in 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 to message
+ }
+ }
+ else
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
+ "WLAN client not in session list and it is a fragment message\n");
+ return;
+ }
+
+ }
+
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK)
+ {
+ GNUNET_assert(client != NULL);
+ session_light = (struct Session_light *) client;
+ if (session_light->session == NULL)
+ {
+ session_light->session = search_session(plugin, session_light->addr);
+ }
+ session = session_light->session;
+ fh = (struct FragmentationHeader *) &hdr[1];
+ if (fh->message_id == session->message_id_out)
+ {
+ fm = get_fragment_message_from_session(session);
+ if (fm != NULL)
+ {
+ ack = GNUNET_malloc(sizeof(struct AckQueue));
+ ack->fragment_num = fh->fragment_off_or_num;
+ ack2 = fm->head;
+ while (ack2!=NULL){
+ if (ack2->fragment_num != ack->fragment_num)
+ {
+ if (ack2->fragment_num > ack->fragment_num)
+ {
+ GNUNET_CONTAINER_DLL_insert_before(fm->head,fm->tail,ack2,ack);
+ //check if finished
+ check_finished_fragment(plugin, fm);
+ }
+ }
+ 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;
+ }
+
+ }
+
+ }
+
+ else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL)
+ {
+ //TODO Control
+ if (ntohs(hdr->size) == 6)
+ {
+ plugin->mac_address = GNUNET_malloc(6);
+ memcpy(plugin->mac_address, &hdr[1], 6);
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying transport of address %s\n",
+ wlan_plugin_address_to_string(cls, plugin->mac_address, hdr->size));
+ plugin->env->notify_address(plugin->env->cls, "wlan",
+ &plugin->mac_address, sizeof(plugin->mac_address),
+ 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?
+ }
}
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct Plugin *plugin = cls;
- char mybuf[WLAN_MTU];
+ plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
+
+ char mybuf[WLAN_MTU + sizeof(struct GNUNET_MessageHeader)];
ssize_t bytes;
if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
return;
+
bytes = GNUNET_DISK_file_read (plugin->server_stdout_handle,
mybuf, sizeof(mybuf));
if (bytes <= 0)
{
-#if DEBUG_TCP_NAT
+#if DEBUG_wlan
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
_("Finished reading from wlan-helper stdout with code: %d\n"), bytes);
#endif
return;
}
GNUNET_SERVER_mst_receive(plugin->consoltoken, NULL,
- mybuf, bytes, 0, GNUNET_NO);
+ 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);
}
* @return GNUNET_YES if process was started, GNUNET_SYSERR on error
*/
static int
-wlan_transport_start_wlan_helper (struct Plugin *plugin)
+wlan_transport_start_wlan_helper(struct Plugin *plugin)
{
- plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_NO, GNUNET_YES);
+ plugin->server_stdout = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_NO, GNUNET_YES);
if (plugin->server_stdout == NULL)
return GNUNET_SYSERR;
- plugin->server_stdin = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO);
- if (plugin->server_stdin == NULL)
- return GNUNET_SYSERR;
+ plugin->server_stdin = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_YES, GNUNET_NO);
+ if (plugin->server_stdin == NULL)
+ return GNUNET_SYSERR;
-#if DEBUG_TCP_NAT
+#if DEBUG_wlan
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting gnunet-wlan-helper process cmd: %s %s\n", "gnunet-wlan-helper", plugin->interface);
+ "Starting gnunet-wlan-helper process cmd: %s %s\n", "gnunet-wlan-helper", plugin->interface);
#endif
/* Start the server process */
- plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin, plugin->server_stdout, "gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", plugin->interface, NULL);
+ plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin,
+ plugin->server_stdout, "gnunet-transport-wlan-helper",
+ "gnunet-transport-wlan-helper", plugin->interface, NULL);
if (plugin->server_proc == NULL)
{
-#if DEBUG_TCP_NAT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to start gnunet-wlan-helper process\n");
+#if DEBUG_wlan
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to start gnunet-wlan-helper process\n");
#endif
return GNUNET_SYSERR;
}
/* Close the read end of the write pipe */
GNUNET_DISK_pipe_close_end(plugin->server_stdin, GNUNET_DISK_PIPE_END_READ);
- plugin->server_stdout_handle = GNUNET_DISK_pipe_handle(plugin->server_stdout, GNUNET_DISK_PIPE_END_READ);
- plugin->server_stdin_handle = GNUNET_DISK_pipe_handle(plugin->server_stdin, GNUNET_DISK_PIPE_END_WRITE);
+ plugin->server_stdout_handle = GNUNET_DISK_pipe_handle(plugin->server_stdout,
+ GNUNET_DISK_PIPE_END_READ);
+ plugin->server_stdin_handle = GNUNET_DISK_pipe_handle(plugin->server_stdin,
+ GNUNET_DISK_PIPE_END_WRITE);
- plugin->server_read_task =
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin);
+ 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);
return GNUNET_YES;
}
plugin = GNUNET_malloc (sizeof (struct Plugin));
plugin->env = env;
plugin->pendingsessions = 0;
+ plugin->session_count = 0;
plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
wlan_transport_start_wlan_helper(plugin);
plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin);
* Exit point from the plugin.
*/
//TODO doxigen
+//fixme cleanup
void *
libgnunet_plugin_transport_wlan_done (void *cls)
{
struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
struct Plugin *plugin = api->cls;
+ GNUNET_SERVER_mst_destroy(plugin->consoltoken);
+
GNUNET_assert(cls !=NULL);
GNUNET_free_non_null(plugin->mac_address);
projects / oweals / gnunet.git / commitdiff