/*
- 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
* @author David Brodski
*/
+//TODO split rx and tx structures for better handling
+
#include "platform.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
-#include "plugin_transport.h"
+#include "gnunet_transport_plugin.h"
#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
+#include "gnunet_crypto_lib.h"
+#include "gnunet_fragmentation_lib.h"
+#include "gnunet_constants.h"
+//#include "wlan/ieee80211.h"
+//#include <netinet/ip.h>
+
+#include <string.h>
#define PROTOCOL_PREFIX "wlan"
+#define PLUGIN_LOG_NAME "wlan-plugin"
+
/**
- * Max size of packet from helper
+ * Max size of packet
*/
-#define WLAN_MTU 3000
+#define WLAN_MTU 1430
/**
- * Time until retransmission of a fragment in ms
+ * time out of a session
*/
+#define SESSION_TIMEOUT GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT
-#define FRAGMENT_TIMEOUT 1000
+/**
+ * time out of a mac endpoint
+ */
+#define MACENDPOINT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, 2)
+/**
+ * scaling factor for hello beacon
+ */
+#define HELLO_BEACON_SCALING_FACTOR 30
-#define DEBUG_wlan GNUNET_NO
+/**
+ * scaling factor for restarting the helper
+ */
+#define HELPER_RESTART_SCALING_FACTOR 2
/**
- * After how long do we expire an address that we
- * learned from another peer if it is not reconfirmed
- * by anyone?
+ * max size of fragment queue
+ */
+#define FRAGMENT_QUEUE_SIZE 10
+/**
+ * max messages in fragment queue per session/client
*/
-#define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1
/**
- * Initial handshake message for a session.
+ * max messages in fragment queue per MAC
*/
-struct WelcomeMessage
-{
- /**
- * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME.
- */
- struct GNUNET_MessageHeader header;
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT 1
+
+/**
+ * max messages in in queue
+ */
+#define MESSAGES_IN_QUEUE_SIZE 10
+/**
+ * max messages in in queue per session/client
+ */
+#define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 1
+
+/**
+ * LLC fields for better compatibility
+ */
+#define WLAN_LLC_DSAP_FIELD 0x1f
+#define WLAN_LLC_SSAP_FIELD 0x1f
+
+
+/**
+ * DEBUG switch
+ */
+#define DEBUG_wlan GNUNET_EXTRA_LOGGING
+#define DEBUG_wlan_retransmission GNUNET_EXTRA_LOGGING
+#define DEBUG_wlan_ip_udp_packets_on_air GNUNET_NO
+#define DEBUG_wlan_msg_dump GNUNET_EXTRA_LOGGING
- /**
- * Identity of the node connecting (TCP client)
- */
- struct GNUNET_PeerIdentity clientIdentity;
+#define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
+
+#define IEEE80211_FC0_VERSION_MASK 0x03
+#define IEEE80211_FC0_VERSION_SHIFT 0
+#define IEEE80211_FC0_VERSION_0 0x00
+#define IEEE80211_FC0_TYPE_MASK 0x0c
+#define IEEE80211_FC0_TYPE_SHIFT 2
+#define IEEE80211_FC0_TYPE_MGT 0x00
+#define IEEE80211_FC0_TYPE_CTL 0x04
+#define IEEE80211_FC0_TYPE_DATA 0x08
+
+/*
+ * Structure of an internet header, naked of options.
+ */
+struct iph
+{
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ unsigned int ip_hl:4; /* header length */
+ unsigned int ip_v:4; /* version */
+#endif
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int ip_v:4; /* version */
+ unsigned int ip_hl:4; /* header length */
+#endif
+ u_int8_t ip_tos; /* type of service */
+ u_short ip_len; /* total length */
+ u_short ip_id; /* identification */
+ u_short ip_off; /* fragment offset field */
+#define IP_RF 0x8000 /* reserved fragment flag */
+#define IP_DF 0x4000 /* dont fragment flag */
+#define IP_MF 0x2000 /* more fragments flag */
+#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
+ u_int8_t ip_ttl; /* time to live */
+ u_int8_t ip_p; /* protocol */
+ u_short ip_sum; /* checksum */
+ struct in_addr ip_src, ip_dst; /* source and dest address */
+};
+
+struct udphdr
+{
+ u_int16_t source;
+ u_int16_t dest;
+ u_int16_t len;
+ u_int16_t check;
};
+/*
+ * generic definitions for IEEE 802.11 frames
+ */
+struct ieee80211_frame
+{
+ u_int8_t i_fc[2];
+ u_int8_t i_dur[2];
+ u_int8_t i_addr1[IEEE80211_ADDR_LEN];
+ u_int8_t i_addr2[IEEE80211_ADDR_LEN];
+ u_int8_t i_addr3[IEEE80211_ADDR_LEN];
+ u_int8_t i_seq[2];
+ u_int8_t llc[4];
+#if DEBUG_wlan_ip_udp_packets_on_air > 1
+ struct iph ip;
+ struct udphdr udp;
+#endif
+} GNUNET_PACKED;
+
/**
* Encapsulation of all of the state of the plugin.
*/
struct GNUNET_TRANSPORT_PluginEnvironment *env;
/**
- * List of open sessions. head
+ * List of open connections. head
*/
- struct Sessionqueue *sessions;
+ struct MacEndpoint *mac_head;
/**
- * List of open sessions. tail
+ * List of open connections. tail
*/
- struct Sessionqueue *sessions_tail;
+ struct MacEndpoint *mac_tail;
/**
- * encapsulation to the local wlan server prog
+ * Number of connections
*/
+ unsigned int mac_count;
- struct GNUNET_SERVER_MessageStreamTokenizer * consoltoken;
+ /**
+ * encapsulation of data from the local wlan helper program
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer *suid_tokenizer;
+ /**
+ * encapsulation of packets received from the wlan helper
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer *data_tokenizer;
/**
* stdout pipe handle for the gnunet-wlan-helper process
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
*/
- pid_t server_pid;
+ struct GNUNET_OS_Process *server_proc;
/**
* The interface of the wlan card given to us by the user.
*/
char *interface;
+ /**
+ * Mode of operation for the helper, 0 = normal, 1 = first loopback, 2 = second loopback
+ */
+ long long unsigned int testmode;
+
/**
* The mac_address of the wlan card given to us by the helper.
*/
- char *mac_address;
+ struct MacAddress mac_address;
/**
* Sessions currently pending for transmission
- * to this peer, if any.
+ * to a peer, if any.
*/
- struct Sessionqueue * pending_Sessions;
+ struct Sessionqueue *pending_Sessions_head;
/**
- * Sessions currently pending for transmission
- * to this peer (tail), if any.
- */
- struct Sessionqueue * pending_Sessions_tail;
+ * Sessions currently pending for transmission
+ * to a peer (tail), if any.
+ */
+ struct Sessionqueue *pending_Sessions_tail;
/**
* number of pending sessions
*/
- uint pendingsessions;
-
-};
-
-//TODO doxigen
-
-struct Sessionqueue
-{
- struct Sessionqueue * next;
- struct Sessionqueue * prev;
- struct Session * content;
-};
-
-//TODO doxigen
-
-struct FragmentQueue
-{
- struct FragmentQueue * next;
- struct FragmentQueue * prev;
- int fragment_num;
-};
-
-/**
- * Session handle for connections.
- */
-struct Session
-{
+ unsigned int pendingsessions;
/**
- * API requirement.
+ * Messages in the sending queues
*/
- struct SessionHeader header;
+ int pending_Fragment_Messages;
/**
- * Pointer to the global plugin struct.
+ * messages ready for send, head
*/
- struct Plugin *plugin;
-
+ struct FragmentMessage_queue *sending_messages_head;
/**
- * Messages currently pending for transmission
- * to this peer, if any.
+ * messages ready for send, tail
*/
- struct PendingMessage *pending_messages_head;
-
+ struct FragmentMessage_queue *sending_messages_tail;
/**
- * Messages currently pending for transmission
- * to this peer, if any.
+ * time of the next "hello-beacon"
*/
- struct PendingMessage *pending_messages_tail;
+ struct GNUNET_TIME_Absolute beacon_time;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * queue to send acks for received fragments (head)
*/
- struct GNUNET_PeerIdentity target;
+ struct AckSendQueue *ack_send_queue_head;
/**
- * encapsulation of the data
+ * queue to send acks for received fragments (tail)
*/
- //struct GNUNET_SERVER_MessageStreamTokenizer * datatoken;
+ struct AckSendQueue *ack_send_queue_tail;
/**
- * peer mac address
+ * Tracker for bandwidth limit
*/
- char addr[6];
+ struct GNUNET_BANDWIDTH_Tracker tracker;
+};
+/**
+ * Struct to store data if file write did not accept the whole packet
+ */
+struct Finish_send
+{
/**
- * Address of the other peer (either based on our 'connect'
- * call or on our 'accept' call).
+ * pointer to the global plugin struct
*/
- void *connect_addr;
+ struct Plugin *plugin;
/**
- * Last activity on this connection. Used to select preferred
- * connection.
+ * head of the next part to send to the helper
*/
- struct GNUNET_TIME_Absolute last_activity;
+ char *head_of_next_write;
/**
- * current number for message incoming , to distinguish between the messages
+ * Start of the message to send, needed for free
*/
- uint32_t message_id_in;
+ struct GNUNET_MessageHeader *msgstart;
/**
- * current number for message outgoing, to distinguish between the messages
+ * rest size to send
*/
- uint32_t message_id_out;
+ ssize_t size;
+};
+
+/**
+ * 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;
+};
+
+/**
+ * Queue of fragmented messages, for the sending queue of the plugin
+ */
+//TODO DOXIGEN
+struct FragmentMessage_queue
+{
+ struct FragmentMessage_queue *next;
+ struct FragmentMessage_queue *prev;
+ struct FragmentMessage *content;
+};
+/**
+ * Queue for the fragments received
+ */
+//TODO DOXIGEN
+struct Receive_Fragment_Queue
+{
+ 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 MacEndpoint_id_fragment_triple
+{
+ struct MacEndpoint *endpoint;
+ uint32_t message_id;
+ struct FragmentMessage *fm;
+};
+//TODO DOXIGEN
+struct Plugin_Session_pair
+{
+ struct Plugin *plugin;
+ struct Session *session;
};
/**
*/
struct PendingMessage
{
-
/**
- * This is a doubly-linked list.
+ * dll next
*/
struct PendingMessage *next;
-
/**
- * This is a doubly-linked list.
+ * dll prev
*/
struct PendingMessage *prev;
/**
* The pending message
*/
- const char *msg;
+ struct WlanHeader *msg;
+
+ /**
+ * Size of the message
+ */
+ size_t message_size;
/**
* Continuation function to call once the message
/**
* Cls for transmit_cont
*/
- void * transmit_cont_cls;
+ void *transmit_cont_cls;
/**
* Timeout value for the pending message.
*/
struct GNUNET_TIME_Absolute timeout;
+};
+
+/**
+ * Queue for acks to send for fragments recived
+ */
+struct AckSendQueue
+{
+
/**
- * Timeout value for the pending fragments.
- * Stores the time when the last msg fragment ack was received
+ * next ack in the ack send queue
*/
- struct GNUNET_TIME_Absolute last_ack;
-
+ struct AckSendQueue *next;
/**
- * Sorted queue with the acks received for fragments; head
+ * previous ack in the ack send queue
*/
+ struct AckSendQueue *prev;
+ /**
+ * pointer to the session this ack belongs to
+ */
+ struct MacEndpoint *endpoint;
+ /**
+ * ID of message, to distinguish between the messages, picked randomly.
+ */
+ uint32_t message_id;
- struct FragmentQueue * head;
-
/**
- * Sorted queue with the acks received for fragments; tail
+ * msg to send
+ */
+ struct GNUNET_MessageHeader *hdr;
+ /**
+ * pointer to the ieee wlan header
+ */
+ struct ieee80211_frame *ieeewlanheader;
+ /**
+ * pointer to the radiotap header
*/
+ struct Radiotap_Send *radioHeader;
+};
- struct FragmentQueue * tail;
+/**
+ * Session infos gathered from a messages
+ */
+struct Session_light
+{
/**
- * Size of the message
+ * the session this message belongs to
*/
- size_t message_size;
+ struct Session *session;
+ /**
+ * peer mac address
+ */
+ struct MacAddress addr;
/**
- * pos / next fragment number in the message, for fragmentation/segmentation,
- * some acks can be missing but there is still time
+ * mac endpoint
*/
- uint32_t message_pos;
+ struct MacEndpoint *macendpoint;
};
-
/**
- * Header for messages which need fragmentation
+ * Session handle for connections.
*/
-struct WlanHeader
+struct Session
{
- struct GNUNET_MessageHeader header;
+ /**
+ * API requirement.
+ */
+ struct SessionHeader header;
+
+ /**
+ * Message currently pending for transmission
+ * to this peer, if any. head
+ */
+ struct PendingMessage *pending_message_head;
/**
- * checksum/error correction
+ * Message currently pending for transmission
+ * to this peer, if any. tail
*/
- uint32_t crc GNUNET_PACKED;
+ struct PendingMessage *pending_message_tail;
/**
* To whom are we talking to (set to our identity
*/
struct GNUNET_PeerIdentity target;
- // followed by payload
+ /**
+ * Address of the other peer (either based on our 'connect'
+ * call or on our 'accept' call).
+ */
+ void *connect_addr;
+
+ /**
+ * Last activity on this connection. Used to select preferred
+ * connection and timeout
+ */
+ struct GNUNET_TIME_Absolute last_activity;
+
+ /**
+ * Timeout task.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * peer connection
+ */
+ struct MacEndpoint *mac;
+
+ /**
+ * count of messages in the fragment out queue for this session
+ */
+
+ int fragment_messages_out_count;
};
/**
- * Header for messages which need fragmentation
+ * Struct to represent one network card connection
*/
-struct FragmentationHeader
+struct MacEndpoint
{
+ /**
+ * Pointer to the global plugin struct.
+ */
+ struct Plugin *plugin;
+ /**
+ * Struct to hold the session reachable over this mac; head
+ */
+ struct Sessionqueue *sessions_head;
+ /**
+ * Struct to hold the session reachable over this mac; tail
+ */
+ struct Sessionqueue *sessions_tail;
+ /**
+ * Messages currently sending
+ * to a peer, if any.
+ */
+ struct FragmentMessage *sending_messages_head;
- struct GNUNET_MessageHeader header;
+ /**
+ * Messages currently sending
+ * to a peer (tail), if any.
+ */
+ struct FragmentMessage *sending_messages_tail;
+ /**
+ * dll next
+ */
+ struct MacEndpoint *next;
+ /**
+ * dll prev
+ */
+ struct MacEndpoint *prev;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * peer mac address
*/
- // struct GNUNET_PeerIdentity target GNUNET_PACKED;
+ struct MacAddress addr;
/**
- * ID of message, to distinguish between the messages, picked randomly.
+ * Defrag context for this mac endpoint
*/
- uint32_t message_id GNUNET_PACKED;
+ struct GNUNET_DEFRAGMENT_Context *defrag;
/**
- * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ * count of messages in the fragment out queue for this mac endpoint
*/
- uint16_t fragment_off_or_num GNUNET_PACKED;
+
+ int fragment_messages_out_count;
+
+ //TODO DOXIGEN
+ uint8_t rate;
+ uint16_t tx_power;
+ uint8_t antenna;
/**
- * CRC of fragment (for error checking)
+ * Duplicates received
*/
- uint16_t message_crc GNUNET_PACKED;
+ int dups;
/**
- * 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
+ * Fragments received
*/
- // uint32_t flags GNUNET_PACKED;
+ int fragc;
/**
- * checksum/error correction
+ * Acks received
*/
- // uint32_t crc GNUNET_PACKED;
+ int acks;
- // followed by payload unless ACK
+ /**
+ * Last activity on this endpoint. Used to select preferred
+ * connection.
+ */
+ struct GNUNET_TIME_Absolute last_activity;
+ /**
+ * Timeout task.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
};
-//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);
-
/**
- * get the next message number, at the moment just a random one
- *
+ * Struct for Messages in the fragment queue
*/
-//TODO doxigen
-uint32_t
-get_next_message_id()
-{
- // FIXME find good random generator
- if (RAND_MAX < UINT32_MAX){
- return (random() * random()) % UINT32_MAX;
- } else {
- return random() % UINT32_MAX;
- }
-}
-/**
- * start next message number generator
- */
-//TODO doxigen
-void
-start_next_message_id()
+struct FragmentMessage
{
- //FIXME not good
- srand(GNUNET_TIME_absolute_get().value);
-}
+ /**
+ * Session this message belongs to
+ */
-/**
- * get Session from address
- *
- */
-//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)
-{
- 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;
- }
- // new session
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
-
- 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 welcome message for new sessions, not realy needed
- //struct WelcomeMessage welcome;
- struct PendingMessage *pm;
- pm = GNUNET_malloc (sizeof (struct PendingMessage) + GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->msg = (const char*) &pm[1];
- 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[1], * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
- GNUNET_CONTAINER_DLL_insert ((queue->content)->pending_messages_head,
- (queue->content)->pending_messages_tail,
- pm);
- plugin->pendingsessions ++;
- GNUNET_CONTAINER_DLL_insert_after(plugin->pending_Sessions, plugin->pending_Sessions_tail, plugin->pending_Sessions_tail, queue);
- return queue->content;
+ struct Session *session;
-}
+ /**
+ * This is a doubly-linked list.
+ */
+ struct FragmentMessage *next;
-/**
- * Queue the session to send data
- */
-//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 ++;
+ /**
+ * This is a doubly-linked list.
+ */
+ struct FragmentMessage *prev;
-}
+ /**
+ * Fragmentation context
+ */
+ struct GNUNET_FRAGMENT_Context *fragcontext;
-//TODO doxigen
-static void
-free_acks (struct PendingMessage * pm){
- struct FragmentQueue * fq;
- while (pm->head != NULL){
- fq = pm->head;
- GNUNET_CONTAINER_DLL_remove(pm->head, pm->tail, fq);
- GNUNET_free(fq);
- }
-}
+ /**
+ * Timeout value for the message.
+ */
+ struct GNUNET_TIME_Absolute timeout;
-/**
- * Function called to when wlan helper is ready to get some data
- *
+ /**
+ * Timeout task.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * Fragment to send
+ */
+ char *frag;
+
+ /**
+ * size of message
+ */
+ size_t size;
+
+ /**
+ * pointer to the ieee wlan header
+ */
+ struct ieee80211_frame *ieeewlanheader;
+ /**
+ * pointer to the radiotap header
+ */
+ struct Radiotap_Send *radioHeader;
+};
+
+static void
+do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+static void
+free_session (struct Plugin *plugin, struct Sessionqueue *queue,
+ int do_free_macendpoint);
+static struct MacEndpoint *
+create_macendpoint (struct Plugin *plugin, const struct MacAddress *addr);
+
+static void
+finish_sending (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+/**
+ * Generates a nice hexdump of a memory area.
+ *
+ * \param mem pointer to memory to dump
+ * \param length how many bytes to dump
+ */
+static void
+hexdump (const void *mem, unsigned length)
+{
+ char line[80];
+ char *src = (char *) mem;
+
+ printf ("dumping %u bytes from %p\r\n"
+ " 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF\r\n",
+ length, src);
+ unsigned i;
+ int j;
+
+ for (i = 0; i < length; i += 16, src += 16)
+ {
+ char *t = line;
+
+ t += sprintf (t, "%04x: ", i);
+ for (j = 0; j < 16; j++)
+ {
+ if (i + j < length)
+ t += sprintf (t, "%02X", src[j] & 0xff);
+ else
+ t += sprintf (t, " ");
+ t += sprintf (t, j % 2 ? " " : "-");
+ }
+
+ t += sprintf (t, " ");
+ for (j = 0; j < 16; j++)
+ {
+ if (i + j < length)
+ {
+ if (isprint ((unsigned char) src[j]))
+ t += sprintf (t, "%c", src[j]);
+ else
+ t += sprintf (t, ".");
+ }
+ else
+ {
+ t += sprintf (t, " ");
+ }
+ }
+
+ t += sprintf (t, "\r\n");
+ printf ("%s", line);
+ }
+}
+
+/**
+ * Function to find a MacEndpoint with a specific mac addr
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the mac address
+ * @param create_new GNUNET_YES if a new end point should be created
+ * @return
+ */
+static struct MacEndpoint *
+get_macendpoint (struct Plugin *plugin, const struct MacAddress *addr,
+ int create_new)
+{
+ struct MacEndpoint *queue = plugin->mac_head;
+
+ while (queue != NULL)
+ {
+ //GNUNET_assert (queue->sessions_head != NULL);
+ if (memcmp (addr, &queue->addr, sizeof (struct MacAddress)) == 0)
+ return queue; /* session found */
+ queue = queue->next;
+ }
+
+ if (create_new == GNUNET_YES)
+ {
+ return create_macendpoint (plugin, addr);
+ }
+ else
+ {
+ return NULL;
+ }
+
+}
+
+/**
+ * search for a session with the macendpoint and peer id
+ *
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the mac endpoint of the peer
+ * @param peer pointer to the peerid
+ * @return returns the session
+ */
+static struct Session *
+search_session (struct Plugin *plugin, const struct MacEndpoint *endpoint,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ GNUNET_assert (endpoint != NULL);
+ struct Sessionqueue *queue = endpoint->sessions_head;
+
+ while (queue != NULL)
+ {
+ GNUNET_assert (queue->content != NULL);
+ if (memcmp
+ (peer, &queue->content->target,
+ sizeof (struct GNUNET_PeerIdentity)) == 0)
+ return queue->content; /* session found */
+ queue = queue->next;
+ }
+ return NULL;
+}
+
+/**
+ * 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 GNUNET_SCHEDULER_TaskContext
+ * @param addr binary address
+ * @param addrlen length of the address
+ * @return string representing the same address
*/
+static const char *
+wlan_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
+{
+ static char ret[40];
+ const struct MacAddress *mac;
+
+ if (addrlen != sizeof (struct MacAddress))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ mac = addr;
+ GNUNET_snprintf (ret, sizeof (ret), "%s Mac-Address %X:%X:%X:%X:%X:%X",
+ PROTOCOL_PREFIX, mac->mac[0], mac->mac[1], mac->mac[2],
+ mac->mac[3], mac->mac[4], mac->mac[5]);
+ return ret;
+}
+
+/**
+ * Function for the scheduler if a session times out
+ * @param cls pointer to the Sessionqueue
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
+ */
static void
-do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Plugin * plugin = cls;
- ssize_t bytes;
+ struct Sessionqueue *queue = cls;
+ GNUNET_assert (queue != NULL);
+ GNUNET_assert(queue->content != NULL);
+ queue->content->timeout_task = GNUNET_SCHEDULER_NO_TASK;
if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ {
return;
+ }
+ if (GNUNET_TIME_absolute_get_remaining
+ (GNUNET_TIME_absolute_add
+ (queue->content->last_activity, SESSION_TIMEOUT)).rel_value == 0)
+ {
+
+ GNUNET_assert(queue->content->mac != NULL);
+ GNUNET_assert(queue->content->mac->plugin != NULL);
+ GNUNET_STATISTICS_update (queue->content->mac->plugin->env->stats, _("# wlan session timeouts"), 1, GNUNET_NO);
+ free_session (queue->content->mac->plugin, queue, GNUNET_YES);
+ }
+ else
+ {
+ queue->content->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (SESSION_TIMEOUT, &session_timeout, queue);
+ }
+}
- struct Session * session;
- struct Sessionqueue * queue;
- struct PendingMessage * pm;
- struct IeeeHeader * wlanheader;
- struct RadiotapHeader * radioHeader;
- struct GNUNET_MessageHeader * msgheader;
- struct FragmentationHeader fragheader;
- uint16_t size = 0;
- const char * copystart = NULL;
- uint16_t copysize = 0;
- uint copyoffset = 0;
- struct FragmentQueue * akt = NULL;
- int exit = 0;
-
- int i = 0;
-
- struct GNUNET_TIME_Absolute nextsend;
- struct GNUNET_TIME_Relative timeout;
- struct Sessionqueue * nextsession = NULL;
-
- timeout.value = FRAGMENT_TIMEOUT;
- nextsend = GNUNET_TIME_absolute_get_forever();
-
- queue = plugin->pending_Sessions;
-
- // check if the are some pending sessions/messages ...
- GNUNET_assert(queue != NULL);
-
- session = queue->content;
- GNUNET_assert(session != NULL);
-
- pm = session->pending_messages_head;
- GNUNET_assert(pm != NULL);
-
- // get next valid session
- // check if this session is only waiting to receive the acks for an already send fragments to finish it
- // timeout is not reached
- for (i = 0; i < plugin->pendingsessions; i++){
-
- // check if the are some pending sessions/messages ...
- GNUNET_assert(queue != NULL);
-
- session = queue->content;
- GNUNET_assert(session != NULL);
-
- pm = session->pending_messages_head;
- GNUNET_assert(pm != NULL);
-
- //save next session
- nextsession = queue->next;
- // test if message timed out
- while (GNUNET_TIME_absolute_get_remaining(pm->timeout).value == 0){
- //remove message
- //free the acks
- free_acks (pm);
- //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);
- //remove the message
- GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail,
- pm);
- GNUNET_free(pm);
-
- //test if there are no more messages pending for this session
- if (session->pending_messages_head == NULL){
-
- //test if tail is null too
- GNUNET_assert(session->pending_messages_tail == NULL);
-
- plugin->pendingsessions --;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions, plugin->pending_Sessions_tail, queue);
- GNUNET_free(queue);
- queue = NULL;
- break;
-
- } else {
- pm = session->pending_messages_head;
- }
-
- }
- // restore next session if necessary
- if (queue == NULL){
- queue = nextsession;
- nextsession = NULL;
- //there are no more messages in this session
- continue;
- }
- nextsession = NULL;
-
- // test if retransmit is needed
- if (GNUNET_TIME_absolute_get_duration(pm->last_ack).value < FRAGMENT_TIMEOUT) {
- // get last offset for this message
- copyoffset = pm->message_size /(WLAN_MTU - sizeof(struct FragmentationHeader));
- // one more is the end
- copyoffset ++;
- // test if it is not the end
- if (copyoffset > pm->message_pos){
- nextsession = queue;
- break;
- }
-
- nextsend = GNUNET_TIME_absolute_min(GNUNET_TIME_absolute_add(pm->last_ack, timeout), nextsend);
-
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions, plugin->pending_Sessions_tail, queue);
- //insert at the tail
- GNUNET_CONTAINER_DLL_insert_after (plugin->pending_Sessions,
- plugin->pending_Sessions_tail,
- plugin->pending_Sessions_tail, queue);
-
- //get next pending session
- queue = queue->next;
-
- } else {
- // retransmit
- nextsession = queue;
- break;
- }
- }
-
-
- //test if there is one session to send something
- if (nextsession != NULL){
- queue = nextsession;
-
- // check if the are some pending sessions/messages ...
- GNUNET_assert(queue != NULL);
-
- session = queue->content;
- GNUNET_assert(session != NULL);
-
- pm = session->pending_messages_head;
- GNUNET_assert(pm != NULL);
- } else {
- //nothing to send at the moment
- plugin->server_read_task =
- GNUNET_SCHEDULER_add_delayed (plugin->env->sched,
- GNUNET_TIME_absolute_get_remaining(nextsend),
- &do_transmit, plugin);
-
- }
-
-
-
- if (pm->message_size > WLAN_MTU) {
- size += sizeof(struct FragmentationHeader);
- // check for retransmission
- if (GNUNET_TIME_absolute_get_duration(pm->last_ack).value > FRAGMENT_TIMEOUT) {
- // TODO retransmit
- // be positive and try again later :-D
- pm->last_ack = GNUNET_TIME_absolute_get();
- // find first missing fragment
- exit = 0;
- akt = pm->head;
- pm->message_pos = 0;
-
- //test if ack 0 was already received
- while (akt != NULL){
- //if fragment is present, take next
- if (akt->fragment_num == pm->message_pos) {
- pm->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
- if (akt->fragment_num > pm->message_pos) {
- break;
- }
-
- akt = akt->next;
+/**
+ * create a new session
+ *
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the mac endpoint of the peer
+ * @param peer peer identity to use for this session
+ * @return returns the session
+ */
- }
+static struct Session *
+create_session (struct Plugin *plugin, struct MacEndpoint *endpoint,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ GNUNET_assert (endpoint != NULL);
+ GNUNET_assert (plugin != NULL);
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan session created"), 1, GNUNET_NO);
+ struct Sessionqueue *queue =
+ GNUNET_malloc (sizeof (struct Sessionqueue) + sizeof (struct Session));
+
+ GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head,
+ endpoint->sessions_tail, queue);
+
+ queue->content = (struct Session *) &queue[1];
+ queue->content->mac = endpoint;
+ memcpy (&(queue->content->target), peer, sizeof (struct GNUNET_PeerIdentity));
+ queue->content->last_activity = GNUNET_TIME_absolute_get ();
+ queue->content->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (SESSION_TIMEOUT, &session_timeout, queue);
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "New session %p with endpoint %p: %s\n", queue->content,
+ endpoint, wlan_plugin_address_to_string (NULL,
+ endpoint->addr.mac,
+ 6));
+#endif
+ 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
+ * @param peer pointer to the peerid
+ * @return returns the session
+ */
+static struct Session *
+get_session (struct Plugin *plugin, const struct MacAddress *addr,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ struct MacEndpoint *mac;
- copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader)) * pm->message_pos;
- fragheader.fragment_off_or_num = pm->message_pos;
- fragheader.message_id = session->message_id_out;
+ mac = get_macendpoint (plugin, addr, GNUNET_YES);
+ struct Session *session = search_session (plugin, mac, peer);
- // start should be smaller then the packet size
- //TODO send some other data if everything was send but not all acks are present
- GNUNET_assert(copyoffset < pm->message_size);
- copystart = pm->msg + copyoffset;
+ if (session != NULL)
+ return session;
+ return create_session (plugin, mac, peer);
+}
- //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(pm->message_size - copyoffset,
- WLAN_MTU - sizeof(struct FragmentationHeader));
- fragheader.header.size = copysize;
- fragheader.header.type = GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT;
+/**
+ * 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
+ */
+static void
+queue_session (struct Plugin *plugin, struct Session *session)
+{
+ struct Sessionqueue *queue = plugin->pending_Sessions_head;
- //get the next missing fragment
- exit = 0;
- akt = pm->head;
- pm->message_pos ++;
+ if (session->pending_message_head != 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;
+ }
- //test if ack was already received
- while (akt != NULL){
- //if fragment is present, take next
- if (akt->fragment_num == pm->message_pos) {
- pm->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
- if (akt->fragment_num > pm->message_pos) {
- break;
- }
+ // Session is not in the queue
- akt = akt->next;
- }
+ 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++;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ }
- } else {
- // there is no need to split
- copystart = pm->msg;
- copysize = pm->message_size;
- }
- size += copysize;
- size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
- + sizeof(struct GNUNET_MessageHeader);
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size - sizeof(struct GNUNET_MessageHeader));
- msgheader->type = GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA;
+}
- radioHeader = (struct RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
+/**
+ * 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;
- wlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(wlanheader);
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
- //could be faster if content is just send and not copyed before
- //fragmentheader is needed
- if (pm->message_size > WLAN_MTU){
- fragheader.message_crc = getcrc16(copystart, copysize);
- memcpy(&wlanheader[1],&fragheader, sizeof(struct FragmentationHeader));
- memcpy(&wlanheader[1] + sizeof(struct FragmentationHeader),copystart,copysize);
- } else {
- memcpy(&wlanheader[1],copystart,copysize);
+ // 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);
}
+}
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
+/**
+ * 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)
+{
+ //under 10 known peers: once a second
+ if (plugin->mac_count < 10)
+ {
+ plugin->beacon_time =
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS,
+ HELLO_BEACON_SCALING_FACTOR));
+ }
+ //under 30 known peers: every 10 seconds
+ else if (plugin->mac_count < 30)
+ {
+ plugin->beacon_time =
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS,
+ 10 * HELLO_BEACON_SCALING_FACTOR));
+ }
+ //over 30 known peers: once a minute
+ else
+ {
+ plugin->beacon_time =
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_MINUTES,
+ HELLO_BEACON_SCALING_FACTOR));
+ }
+}
+/**
+ * Function to set the timer for the next timeout of the fragment queue
+ * @param plugin the handle to the plugin struct
+ */
+static void
+set_next_send (struct Plugin *const plugin)
+{
+ struct GNUNET_TIME_Relative next_send;
+ //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;
+ }
+ //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
+ else if (plugin->sending_messages_head != NULL)
+ {
+ next_send = GNUNET_TIME_UNIT_ZERO;
+ }
+ else
+ {
+ next_send = GNUNET_TIME_absolute_get_remaining (plugin->beacon_time);
+ }
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Next packet is send in: %u\n", next_send.rel_value);
+#endif
- if (bytes < 1)
+ if (next_send.rel_value == GNUNET_TIME_UNIT_ZERO.rel_value)
+ {
+ if (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK)
{
- return;
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &do_transmit, plugin);
+ }
+ }
+ else
+ {
+ if (plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK)
+ {
+ plugin->server_write_delay_task =
+ GNUNET_SCHEDULER_add_delayed (next_send, &delay_fragment_task,
+ plugin);
}
+ }
+}
- //plugin->server_read_task =
- //GNUNET_SCHEDULER_add_read_file (plugin->env->sched,
- // GNUNET_TIME_UNIT_FOREVER_REL,
- // plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin);
+/**
+ * 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_head;
+
+ while (sessionqueue != NULL)
+ {
+ session = sessionqueue->content;
+
+ GNUNET_assert (session != NULL);
+ pm = session->pending_message_head;
+
+ if (pm == NULL)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from(GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ "pending message is empty, should not happen. session %p\n",
+ session);
+#endif
+ sessionqueue_alt = sessionqueue;
+ sessionqueue = sessionqueue->next;
+ plugin->pendingsessions--;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail,
+ sessionqueue_alt);
-}
+ GNUNET_free (sessionqueue_alt);
+ continue;
+ }
+ //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->mac->fragment_messages_out_count <
+ FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT) &&
+ (session->fragment_messages_out_count <
+ FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION))
+ {
+ plugin->pendingsessions--;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail,
+ sessionqueue);
+ GNUNET_free (sessionqueue);
+
+ return session;
+ }
+ else
+ {
+ sessionqueue = sessionqueue->next;
+ }
+ }
+ else
+ {
+ GNUNET_CONTAINER_DLL_remove (session->pending_message_head,
+ session->pending_message_tail, pm);
+
+ //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_head == NULL)
+ {
+ sessionqueue_alt = sessionqueue;
+ sessionqueue = sessionqueue->next;
+ plugin->pendingsessions--;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail,
+ sessionqueue_alt);
+
+ GNUNET_free (sessionqueue_alt);
+ }
+ }
+
+ }
+ return NULL;
+}
/**
- * If we have pending messages, ask the server to
- * transmit them (schedule the respective tasks, etc.)
- *
- * @param Plugin env to get everything needed
+ * frees the space of a message in the fragment queue (send queue)
+ * @param plugin the plugin struct
+ * @param fm message to free
*/
static void
-process_pending_messages (struct Plugin * plugin)
+free_fragment_message (struct Plugin *plugin, struct FragmentMessage *fm)
{
- struct Sessionqueue * queue;
- struct Session * session;
+ struct Session *session = fm->session;
+ struct MacEndpoint *endpoint = session->mac;
+ struct FragmentMessage_queue *fmq;
+ struct FragmentMessage_queue *fmq_next;
+
+ if (fm != NULL)
+ {
+ fmq = plugin->sending_messages_head;
+ while (fmq != NULL)
+ {
+ fmq_next = fmq->next;
+ if (fmq->content == fm)
+ {
+ GNUNET_CONTAINER_DLL_remove (plugin->sending_messages_head,
+ plugin->sending_messages_tail, fmq);
+ GNUNET_free (fmq);
+ }
+ fmq = fmq_next;
+ }
- if (plugin->pending_Sessions == NULL)
- return;
+ (session->mac->fragment_messages_out_count)--;
+ session->fragment_messages_out_count--;
+ plugin->pending_Fragment_Messages--;
+ GNUNET_CONTAINER_DLL_remove (endpoint->sending_messages_head,
+ endpoint->sending_messages_tail, fm);
+ GNUNET_FRAGMENT_context_destroy (fm->fragcontext);
+ if (fm->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (fm->timeout_task);
+ GNUNET_free (fm);
+
+ queue_session (plugin, session);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Free pending fragment messages %p, session %p\n", fm,
+ session);
+#endif
+ }
+}
- queue = plugin->pending_Sessions;
- //contet should not be empty
- GNUNET_assert(queue->content != NULL);
+/**
+ * function to fill the radiotap header
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the endpoint
+ * @param header pointer to the radiotap header
+ * @return GNUNET_YES at success
+ */
+static int
+getRadiotapHeader (struct Plugin *plugin, struct MacEndpoint *endpoint,
+ struct Radiotap_Send *header)
+{
- session = queue->content;
- //pending sessions should have some msg
- GNUNET_assert(session->pending_messages_head != NULL);
+ if (endpoint != NULL)
+ {
+ header->rate = endpoint->rate;
+ header->tx_power = endpoint->tx_power;
+ header->antenna = endpoint->antenna;
+ }
+ else
+ {
+ header->rate = 255;
+ header->tx_power = 0;
+ header->antenna = 0;
+ }
- // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
- plugin->server_write_task
- = GNUNET_SCHEDULER_add_write_file(plugin->env->sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdin_handle,
- &do_transmit,
- plugin);
+ return GNUNET_YES;
}
+/**
+ * function to generate the wlan hardware header for one packet
+ * @param Header address to write the header to
+ * @param to_mac_addr address of the recipient
+ * @param plugin pointer to the plugin struct
+ * @param size size of the whole packet, needed to calculate the time to send the packet
+ * @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;
+
+ Header->i_fc[0] = IEEE80211_FC0_TYPE_DATA;
+ 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));
+
+ tmp16 = (uint16_t *) Header->i_dur;
+ *tmp16 = (uint16_t) htole16 ((size * 1000000) / rate + 290);
+ Header->llc[0] = WLAN_LLC_DSAP_FIELD;
+ Header->llc[1] = WLAN_LLC_SSAP_FIELD;
+
+#if DEBUG_wlan_ip_udp_packets_on_air > 1
+ uint crc = 0;
+ uint16_t *x;
+ int count;
+
+ Header->ip.ip_dst.s_addr = *((uint32_t *) & to_mac_addr->mac[2]);
+ Header->ip.ip_src.s_addr = *((uint32_t *) & plugin->mac_address.mac[2]);
+ Header->ip.ip_v = 4;
+ Header->ip.ip_hl = 5;
+ Header->ip.ip_p = 17;
+ Header->ip.ip_ttl = 1;
+ Header->ip.ip_len = htons (size + 8);
+ Header->ip.ip_sum = 0;
+ x = (uint16_t *) & Header->ip;
+ count = sizeof (struct iph);
+ while (count > 1)
+ {
+ /* This is the inner loop */
+ crc += (unsigned short) *x++;
+ count -= 2;
+ }
+ /* Add left-over byte, if any */
+ if (count > 0)
+ crc += *(unsigned char *) x;
+ crc = (crc & 0xffff) + (crc >> 16);
+ Header->ip.ip_sum = htons (~(unsigned short) crc);
+ Header->udp.len = htons (size - sizeof (struct ieee80211_frame));
+
+#endif
+
+ return GNUNET_YES;
+}
/**
* 32bit CRC
*/
uint32_t
-getcrc32 (const char *msgbuf,
- size_t msgbuf_size){
- //TODO calc some crc
- return 0;
+getcrc32 (const char *msgbuf, size_t msgbuf_size)
+{
+
+ return GNUNET_CRYPTO_crc32_n (msgbuf, msgbuf_size);;
}
/**
*/
uint16_t
-getcrc16 (const char *msgbuf,
- size_t msgbuf_size){
- //TODO calc some crc
- return 0;
+getcrc16 (const char *msgbuf, size_t msgbuf_size)
+{
+ //TODO calc some crc
+ return 0;
+}
+
+/**
+ * function to add a fragment of a message to send
+ * @param cls FragmentMessage this message belongs to
+ * @param hdr pointer to the start of the message
+ */
+
+void
+add_message_for_send (void *cls, const struct GNUNET_MessageHeader *hdr)
+{
+
+ struct FragmentMessage *fm = cls;
+ struct FragmentMessage_queue *fmqueue;
+
+ GNUNET_assert (cls != NULL);
+ GNUNET_assert (fm->frag == NULL);
+ struct MacEndpoint *endpoint = fm->session->mac;
+ struct Plugin *plugin = endpoint->plugin;
+ struct GNUNET_MessageHeader *msgheader;
+ struct GNUNET_MessageHeader *msgheader2;
+ uint16_t size;
+
+#if DEBUG_wlan_retransmission > 1
+ GNUNET_loHELLO_BEACON_SCALING_FACTORg_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Adding fragment of message %p to send, session %p, endpoint %p, type %u\n",
+ fm, fm->session, endpoint, hdr->type);
+#endif
+
+ size =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) +
+ sizeof (struct ieee80211_frame) + ntohs (hdr->size);
+ fm->frag = GNUNET_malloc (size);
+ fm->size = size;
+
+ msgheader = (struct GNUNET_MessageHeader *) fm->frag;
+ msgheader->size = htons (size);
+ msgheader->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
+
+ fm->radioHeader = (struct Radiotap_Send *) &msgheader[1];
+ fm->ieeewlanheader = (struct ieee80211_frame *) &fm->radioHeader[1];
+ msgheader2 = (struct GNUNET_MessageHeader *) &fm->ieeewlanheader[1];
+ memcpy (msgheader2, hdr, ntohs (hdr->size));
+
+ fmqueue = GNUNET_malloc (sizeof (struct FragmentMessage_queue));
+ fmqueue->content = fm;
+
+ GNUNET_CONTAINER_DLL_insert_tail (plugin->sending_messages_head,
+ plugin->sending_messages_tail, fmqueue);
+ set_next_send (plugin);
+}
+
+
+/**
+ * We have been notified that wlan-helper has written something to stdout.
+ * Handle the output, then reschedule this function to be called again once
+ * more is available.
+ *
+ * @param cls the plugin handle
+ * @param tc the scheduling context
+ */
+static void
+wlan_plugin_helper_read (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+
+ plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
+
+ if (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));
+ if (bytes <= 0)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ _
+ ("Finished reading from wlan-helper stdout with code: %d\n"),
+ bytes);
+#endif
+ return;
+ }
+ GNUNET_SERVER_mst_receive (plugin->suid_tokenizer, NULL, mybuf, bytes,
+ GNUNET_NO, GNUNET_NO);
+
+ GNUNET_assert (plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
+ plugin->server_read_task =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdout_handle,
+ &wlan_plugin_helper_read, plugin);
+}
+
+/**
+ * Start the gnunet-wlan-helper process.
+ *
+ * @param plugin the transport plugin
+ * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
+ */
+static int
+wlan_transport_start_wlan_helper (struct Plugin *plugin)
+{
+ const char *filenamehw = "gnunet-transport-wlan-helper";
+ const char *filenameloopback = "gnunet-transport-wlan-helper-dummy";
+
+ 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;
+
+ /* Start the server process */
+
+ if (plugin->testmode == 0)
+ {
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Starting gnunet-wlan-helper process cmd: %s %s %i\n",
+ filenamehw, plugin->interface, plugin->testmode);
+#endif
+
+ if (GNUNET_OS_check_helper_binary (filenamehw) == GNUNET_YES)
+ {
+ plugin->server_proc =
+ GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout,
+ filenamehw, filenamehw, plugin->interface,
+ NULL);
+ }
+ else if (GNUNET_OS_check_helper_binary (filenamehw) == GNUNET_NO)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ "gnunet-transport-wlan-helper is not suid, please change it or look at the doku\n");
+ GNUNET_break (0);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ "gnunet-transport-wlan-helper not found, please look if it exists and is the $PATH variable!\n");
+ GNUNET_break (0);
+ }
+
+ }
+ else if (plugin->testmode == 1)
+ {
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Starting gnunet-wlan-helper loopback 1 process cmd: %s %s %i\n",
+ filenameloopback, plugin->interface, plugin->testmode);
+#endif
+
+ if (GNUNET_OS_check_helper_binary (filenameloopback) != GNUNET_SYSERR)
+ {
+ plugin->server_proc =
+ GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout,
+ filenameloopback, filenameloopback, "1",
+ NULL);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ "gnunet-transport-wlan-helper-dummy not found, please look if it exists and is the $PATH variable!\n");
+ GNUNET_break (0);
+ }
+ }
+ else if (plugin->testmode == 2)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Starting gnunet-wlan-helper loopback 2 process cmd: %s %s %i\n",
+ filenameloopback, plugin->interface, plugin->testmode);
+#endif
+ if (GNUNET_OS_check_helper_binary (filenameloopback) != GNUNET_SYSERR)
+ {
+ plugin->server_proc =
+ GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout,
+ filenameloopback, filenameloopback, "2",
+ NULL);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ "gnunet-transport-wlan-helper-dummy not found, please look if it exists and is in the $PATH variable!\n");
+ GNUNET_break (0);
+ }
+ }
+ if (plugin->server_proc == NULL)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Failed to start gnunet-wlan-helper process\n");
+#endif
+ return GNUNET_SYSERR;
+ }
+
+ /* Close the write end of the read pipe */
+ GNUNET_DISK_pipe_close_end (plugin->server_stdout,
+ GNUNET_DISK_PIPE_END_WRITE);
+
+ /* Close the read end of the write pipe */
+ GNUNET_DISK_pipe_close_end (plugin->server_stdin, GNUNET_DISK_PIPE_END_READ);
+
+ plugin->server_stdout_handle =
+ GNUNET_DISK_pipe_handle (plugin->server_stdout,
+ GNUNET_DISK_PIPE_END_READ);
+ plugin->server_stdin_handle =
+ GNUNET_DISK_pipe_handle (plugin->server_stdin,
+ GNUNET_DISK_PIPE_END_WRITE);
+
+ GNUNET_assert (plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Adding server_read_task for the wlan-helper\n");
+#endif
+
+ 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;
+}
+
+/**
+ * Stops the gnunet-wlan-helper process.
+ *
+ * @param plugin the transport plugin
+ * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
+ */
+static int
+wlan_transport_stop_wlan_helper (struct Plugin *plugin)
+{
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Stoping WLAN helper process\n");
+#endif
+
+ 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;
+ }
+
+ GNUNET_DISK_pipe_close (plugin->server_stdout);
+ GNUNET_DISK_pipe_close (plugin->server_stdin);
+ GNUNET_OS_process_kill (plugin->server_proc, 9);
+ GNUNET_OS_process_close (plugin->server_proc);
+
+ return GNUNET_YES;
+}
+
+/**
+ * function for delayed restart of the helper process
+ * @param cls Finish_send struct if message should be finished
+ * @param tc TaskContext
+ */
+static void
+delay_restart_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Finish_send *finish = cls;
+ struct Plugin *plugin;
+ plugin = finish->plugin;
+
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
+ {
+ GNUNET_free_non_null(finish->msgstart);
+ GNUNET_free (finish);
+ return;
+ }
+
+ wlan_transport_start_wlan_helper(plugin);
+
+ if (finish->size != 0)
+ {
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &finish_sending, finish);
+ }
+ else
+ {
+ set_next_send (plugin);
+ GNUNET_free_non_null(finish->msgstart);
+ GNUNET_free (finish);
+ }
+
+}
+
+/**
+ * Function to restart the helper
+ * @param plugin pointer to the global plugin struct
+ * @param finish pointer to the Finish_send struct to finish
+ */
+static void
+restart_helper(struct Plugin *plugin, struct Finish_send *finish)
+{
+ static struct GNUNET_TIME_Relative next_try = {1000};
+ GNUNET_assert(finish != NULL);
+
+ wlan_transport_stop_wlan_helper(plugin);
+ plugin->server_write_task = GNUNET_SCHEDULER_add_delayed (next_try, &delay_restart_helper, finish);
+ GNUNET_TIME_relative_multiply(next_try, HELPER_RESTART_SCALING_FACTOR);
+
+}
+
+/**
+ * function to finish a sending if not all could have been writen befor
+ * @param cls pointer to the Finish_send struct
+ * @param tc TaskContext
+ */
+static void
+finish_sending (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Finish_send *finish = cls;
+ struct Plugin *plugin;
+ ssize_t bytes;
+
+ plugin = finish->plugin;
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+
+ 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->head_of_next_write,
+ finish->size);
+
+ if (bytes != finish->size)
+ {
+ if (bytes != GNUNET_SYSERR)
+ {
+ finish->head_of_next_write += bytes;
+ finish->size -= bytes;
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &finish_sending, finish);
+ }
+ else
+ {
+ restart_helper(plugin, finish);
+ }
+ }
+ else
+ {
+ GNUNET_free (finish->msgstart);
+ GNUNET_free (finish);
+ set_next_send (plugin);
+ }
+}
+
+/**
+ * function to send a hello beacon
+ * @param plugin pointer to the plugin struct
+ */
+static void
+send_hello_beacon (struct Plugin *plugin)
+{
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Sending hello beacon\n");
+#endif
+
+ uint16_t size;
+ ssize_t bytes;
+ uint16_t hello_size;
+ struct GNUNET_MessageHeader *msgheader;
+ struct ieee80211_frame *ieeewlanheader;
+ struct Radiotap_Send *radioHeader;
+ struct GNUNET_MessageHeader *msgheader2;
+ const struct GNUNET_MessageHeader *hello;
+ struct Finish_send * finish;
+
+ GNUNET_assert (plugin != NULL);
+
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan hello beacons send"), 1, GNUNET_NO);
+
+ hello = plugin->env->get_our_hello ();
+ hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello);
+ GNUNET_assert (sizeof (struct WlanHeader) + hello_size <= WLAN_MTU);
+ size =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) +
+ sizeof (struct ieee80211_frame) + hello_size;
+
+ 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, size);
+
+ msgheader2 = (struct GNUNET_MessageHeader *) &ieeewlanheader[1];
+ /*msgheader2->size =
+ htons (GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello) +
+ sizeof (struct GNUNET_MessageHeader));
+
+ msgheader2->type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);*/
+ memcpy (msgheader2, hello, hello_size);
+
+ bytes = GNUNET_DISK_file_write (plugin->server_stdin_handle, msgheader, size);
+
+ if (bytes == GNUNET_SYSERR)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ _
+ ("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
+ errno, strerror (errno));
+ finish = GNUNET_malloc (sizeof (struct Finish_send));
+ finish->plugin = plugin;
+ finish->head_of_next_write = NULL;
+ finish->size = 0;
+ finish->msgstart = NULL;
+ restart_helper(plugin, finish);
+
+ set_next_beacon_time (plugin);
+
+ }
+ else
+ {
+ GNUNET_assert (bytes == size);
+ set_next_beacon_time (plugin);
+ set_next_send (plugin);
+ }
+ GNUNET_free (msgheader);
+
+
+}
+
+/**
+ * function to add an ack to send it for a received fragment
+ * @param cls MacEndpoint this ack belongs to
+ * @param msg_id id of the message
+ * @param hdr pointer to the hdr where the ack is stored
+ *
+ */
+
+static void
+add_ack_for_send (void *cls, uint32_t msg_id,
+ const struct GNUNET_MessageHeader *hdr)
+{
+
+ struct AckSendQueue *ack;
+
+ GNUNET_assert (cls != NULL);
+ struct MacEndpoint *endpoint = cls;
+ struct Plugin *plugin = endpoint->plugin;
+ struct GNUNET_MessageHeader *msgheader;
+ struct GNUNET_MessageHeader *msgheader2;
+ uint16_t size;
+
+ size =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) +
+ sizeof (struct ieee80211_frame) + ntohs (hdr->size) +
+ sizeof (struct AckSendQueue);
+
+ ack = GNUNET_malloc (size);
+ ack->message_id = msg_id;
+ ack->endpoint = endpoint;
+
+ size =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) +
+ sizeof (struct ieee80211_frame) + ntohs (hdr->size);
+
+ msgheader = (struct GNUNET_MessageHeader *) &ack[1];
+ ack->hdr = (struct GNUNET_MessageHeader *) &ack[1];
+ msgheader->size = htons (size);
+ msgheader->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
+
+ ack->radioHeader = (struct Radiotap_Send *) &msgheader[1];
+ ack->ieeewlanheader = (struct ieee80211_frame *) &(ack->radioHeader)[1];
+ msgheader2 = (struct GNUNET_MessageHeader *) &(ack->ieeewlanheader)[1];
+ memcpy (msgheader2, hdr, ntohs (hdr->size));
+
+ GNUNET_CONTAINER_DLL_insert_tail (plugin->ack_send_queue_head,
+ plugin->ack_send_queue_tail, ack);
+
+#if DEBUG_wlan_retransmission > 1
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Adding ack with message id %u to send, AckSendQueue %p, endpoint %p\n",
+ msg_id, ack, endpoint);
+#endif
+
+ set_next_send (plugin);
+}
+
+/**
+ * Function for the scheduler if a FragmentMessage times out
+ * @param cls pointer to the FragmentMessage
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
+ */
+static void
+fragmentmessage_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct FragmentMessage *fm = cls;
+
+ GNUNET_assert (fm != NULL);
+ fm->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ {
+ return;
+ }
+ free_fragment_message (fm->session->mac->plugin, fm);
+}
+
+/**
+ * Function to check if there is some space in the fragment queue
+ * inserts a message if space is available
+ * @param plugin the plugin struct
+ */
+
+static void
+check_fragment_queue (struct Plugin *plugin)
+{
+ struct Session *session;
+ struct FragmentMessage *fm;
+ struct GNUNET_PeerIdentity pid;
+
+ struct PendingMessage *pm;
+
+ if (plugin->pending_Fragment_Messages < FRAGMENT_QUEUE_SIZE)
+ {
+ session = get_next_queue_session (plugin);
+ if (session != NULL)
+ {
+ pm = session->pending_message_head;
+ GNUNET_assert (pm != NULL);
+ GNUNET_CONTAINER_DLL_remove (session->pending_message_head,
+ session->pending_message_tail, pm);
+ session->mac->fragment_messages_out_count++;
+ session->fragment_messages_out_count++;
+ plugin->pending_Fragment_Messages++;
+
+ fm = GNUNET_malloc (sizeof (struct FragmentMessage));
+ fm->session = session;
+ fm->timeout.abs_value = pm->timeout.abs_value;
+ fm->frag = NULL;
+ fm->fragcontext =
+ GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
+ &plugin->tracker,
+ GNUNET_TIME_UNIT_SECONDS,
+ &(pm->msg->header),
+ &add_message_for_send, fm);
+ fm->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
+ (fm->timeout), fragmentmessage_timeout,
+ fm);
+ GNUNET_CONTAINER_DLL_insert_tail (session->mac->sending_messages_head,
+ session->mac->sending_messages_tail,
+ fm);
+
+ if (pm->transmit_cont != NULL)
+ {
+ pid = session->target;
+ pm->transmit_cont (pm->transmit_cont_cls, &pid, GNUNET_OK);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "called pm->transmit_cont for %p\n", session);
+#endif
+ }
+ else
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "no pm->transmit_cont for %p\n", session);
+#endif
+ }
+ GNUNET_free (pm);
+
+ if (session->pending_message_head != NULL)
+ {
+ //requeue session
+ queue_session (plugin, session);
+ }
+
+ }
+ }
+
+ //check if timeout changed
+ set_next_send (plugin);
+}
+
+/**
+ * Function to send an ack, does not free the ack
+ * @param plugin pointer to the plugin
+ */
+static void
+send_ack (struct Plugin *plugin)
+{
+
+ ssize_t bytes;
+ struct AckSendQueue *ack;
+ struct Finish_send * finish;
+
+ ack = plugin->ack_send_queue_head;
+
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Sending ack for message_id %u for mac endpoint %p, size %u\n",
+ ack->message_id, ack->endpoint,
+ ntohs (ack->hdr->size) - sizeof (struct Radiotap_Send));
+#endif
+
+ GNUNET_assert (plugin != NULL);
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan acks send"), 1, GNUNET_NO);
+
+ getRadiotapHeader (plugin, ack->endpoint, ack->radioHeader);
+ getWlanHeader (ack->ieeewlanheader, &ack->endpoint->addr, plugin,
+ ntohs (ack->hdr->size));
+
+ bytes =
+ GNUNET_DISK_file_write (plugin->server_stdin_handle, ack->hdr,
+ ntohs (ack->hdr->size));
+ if (bytes == GNUNET_SYSERR)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ _
+ ("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
+ errno, strerror (errno));
+ finish = GNUNET_malloc (sizeof (struct Finish_send));
+ finish->plugin = plugin;
+ finish->head_of_next_write = NULL;
+ finish->size = 0;
+ finish->msgstart = NULL;
+ restart_helper(plugin, finish);
+ }
+ else
+ {
+ GNUNET_assert (bytes == ntohs (ack->hdr->size));
+ GNUNET_CONTAINER_DLL_remove (plugin->ack_send_queue_head,
+ plugin->ack_send_queue_tail, ack);
+ GNUNET_free (ack);
+ set_next_send (plugin);
+ }
+}
+
+/**
+ * Function called when wlan helper is ready to get some data
+ *
+ * @param cls closure
+ * @param tc GNUNET_SCHEDULER_TaskContext
+ */
+static void
+do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+ GNUNET_assert (plugin != NULL);
+
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
+
+ struct Session *session;
+ struct FragmentMessage *fm;
+ struct Finish_send *finish;
+ struct FragmentMessage_queue *fmq;
+ ssize_t bytes;
+
+ if (plugin->ack_send_queue_head != NULL)
+ {
+ send_ack (plugin);
+ return;
+ }
+
+ //test if a "hello-beacon" has to be send
+ if (GNUNET_TIME_absolute_get_remaining (plugin->beacon_time).rel_value == 0)
+ {
+ send_hello_beacon (plugin);
+ return;
+ }
+
+ if (plugin->sending_messages_head != NULL)
+ {
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan fragments send"), 1, GNUNET_NO);
+
+ fmq = plugin->sending_messages_head;
+ fm = fmq->content;
+ GNUNET_CONTAINER_DLL_remove (plugin->sending_messages_head,
+ plugin->sending_messages_tail, fmq);
+ GNUNET_free (fmq);
+
+ session = fm->session;
+ GNUNET_assert (session != NULL);
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Sending GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT for fragment message %p, size: %u\n",
+ fm, fm->size);
+#endif
+
+ getRadiotapHeader (plugin, session->mac, fm->radioHeader);
+ getWlanHeader (fm->ieeewlanheader, &(fm->session->mac->addr), plugin,
+ fm->size);
+
+ bytes =
+ GNUNET_DISK_file_write (plugin->server_stdin_handle, fm->frag,
+ fm->size);
+
+
+ if (bytes != fm->size)
+ {
+ finish = GNUNET_malloc (sizeof (struct Finish_send));
+ finish->plugin = plugin;
+ finish->msgstart = (struct GNUNET_MessageHeader *) fm->frag;
+ GNUNET_assert (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK);
+
+ if (bytes == GNUNET_SYSERR)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ _
+ ("Error writing to wlan healper. errno == %d, ERROR: %s\n"),
+ errno, strerror (errno));
+
+ finish->head_of_next_write = fm->frag;
+ finish->size = fm->size;
+ restart_helper(plugin, finish);
+ }
+ else
+ {
+ finish->head_of_next_write = fm->frag + bytes;
+ finish->size = fm->size - bytes;
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &finish_sending, finish);
+ }
+
+ fm->frag = NULL;
+ }
+ else
+ {
+ GNUNET_free (fm->frag);
+ fm->frag = NULL;
+ set_next_send (plugin);
+ }
+ GNUNET_FRAGMENT_context_transmission_done (fm->fragcontext);
+ return;
+ }
+
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "do_transmit did nothing, should not happen!\n");
+}
+
+/**
+ * Another peer has suggested an address for this
+ * peer and transport plugin. Check that this could be a valid
+ * address. If so, consider adding it to the list
+ * of addresses.
+ *
+ * @param cls closure
+ * @param addr pointer to the address
+ * @param addrlen length of addr
+ * @return GNUNET_OK if this is a plausible address for this peer
+ * and transport
+ */
+static int
+wlan_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
+{
+ //struct Plugin *plugin = cls;
+
+ /* check if the address is plausible; if so,
+ * add it to our list! */
+
+ GNUNET_assert (cls != NULL);
+ //FIXME mitm is not checked
+ //Mac Address has 6 bytes
+ if (addrlen == 6)
+ {
+ /* TODO check for bad addresses like multicast, broadcast, etc */
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "wlan_plugin_address_suggested got good address, size %u!\n", addrlen);
+#endif
+ return GNUNET_OK;
+ }
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "wlan_plugin_address_suggested got bad address, size %u!\n", addrlen);
+#endif
+ 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 Plugin *plugin = cls;
+ struct PendingMessage *newmsg;
+ struct WlanHeader *wlanheader;
+ GNUNET_assert (plugin != NULL);
//check if msglen > 0
- GNUNET_assert(msgbuf_size > 0);
+ GNUNET_assert (msgbuf_size > 0);
//get session if needed
- if (session == NULL) {
- if ( wlan_plugin_address_suggested(plugin , addr, addrlen) == GNUNET_OK){
- session = get_Session(plugin, addr);
- } else {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Wlan Address len %d is wrong\n"),
- addrlen);
- return -1;
- }
+ if (session == NULL)
+ {
+ if (wlan_plugin_address_suggested (plugin, addr, addrlen) == GNUNET_OK)
+ {
+ session = get_session (plugin, addr, target);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ _("Wlan Address len %d is wrong\n"), addrlen);
+ return -1;
+ }
}
- //TODO target "problem" not solved
- session->target = *target;
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan messages queued"), 1, GNUNET_NO);
//queue message:
- //first queue session
- queue_Session(plugin, session);
//queue message in session
- newmsg = GNUNET_malloc(sizeof(struct PendingMessage) + msgbuf_size + sizeof(struct WlanHeader));
- newmsg->msg = (const char*) &newmsg[1];
- wlanheader = (struct WlanHeader *) &newmsg[1];
+ //test if there is no other message in the "queue"
+ //FIXME: to many send requests
+ if (session->pending_message_head != NULL)
+ {
+ newmsg = session->pending_message_head;
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "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 for this mac connection %u\n",
+ GNUNET_TIME_absolute_get_remaining (newmsg->
+ timeout).rel_value,
+ session->mac->fragment_messages_out_count);
+ }
+
+ newmsg = GNUNET_malloc (sizeof (struct PendingMessage));
+ newmsg->msg = GNUNET_malloc (msgbuf_size + sizeof (struct WlanHeader));
+ wlanheader = newmsg->msg;
//copy msg to buffer, not fragmented / segmented yet, but with message header
- wlanheader->header.size = 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);
+ wlanheader->header.size = htons (msgbuf_size + sizeof (struct WlanHeader));
+ wlanheader->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA);
+ memcpy (&(wlanheader->target), target, sizeof (struct GNUNET_PeerIdentity));
+ memcpy (&(wlanheader->source), plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity));
+ wlanheader->crc = 0;
+ memcpy (&wlanheader[1], msgbuf, msgbuf_size);
+ wlanheader->crc =
+ htonl (getcrc32
+ ((char *) wlanheader, msgbuf_size + sizeof (struct WlanHeader)));
+ //GNUNET_log_from(GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, "Wlan message Header crc: %u, %u\n",getcrc32((char*) wlanheader, msgbuf_size + sizeof(struct WlanHeader)), wlanheader->crc);
+ //hexdump(newmsg->msg, msgbuf_size + sizeof(struct WlanHeader));
+
newmsg->transmit_cont = cont;
newmsg->transmit_cont_cls = cont_cls;
- newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout);
- newmsg->message_pos = 0;
- newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
- newmsg->next = NULL;
+ 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);
+
+ GNUNET_CONTAINER_DLL_insert_tail (session->pending_message_head,
+ session->pending_message_tail, newmsg);
- //check if queue is empty
- struct PendingMessage * tailmsg;
- tailmsg = session->pending_messages_tail;
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "New message for %p with size (incl wlan header) %u added\n",
+ session, newmsg->message_size);
+#endif
+#if DEBUG_wlan_msg_dump > 1
+ hexdump (msgbuf, GNUNET_MIN (msgbuf_size, 256));
+#endif
+ //queue session
+ queue_session (plugin, session);
+
+ check_fragment_queue (plugin);
+ //FIXME not the correct size
+ return msgbuf_size;
+
+}
- //new tail is the new msg
- session->pending_messages_tail = newmsg;
- newmsg->prev = tailmsg;
+/**
+ * function to free a mac endpoint
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the MacEndpoint to free
+ */
+static void
+free_macendpoint (struct Plugin *plugin, struct MacEndpoint *endpoint)
+{
+ struct Sessionqueue *sessions;
+ struct Sessionqueue *sessions_next;
+
+ GNUNET_assert (endpoint != NULL);
+
+ sessions = endpoint->sessions_head;
+ while (sessions != NULL)
+ {
+ sessions_next = sessions->next;
+ free_session (plugin, sessions, GNUNET_NO);
+ sessions = sessions_next;
+ }
- //test if tail was not NULL (queue is empty)
- if (tailmsg == NULL){
- // head should be NULL too
- GNUNET_assert(session->pending_messages_head == NULL);
+ GNUNET_CONTAINER_DLL_remove (plugin->mac_head, plugin->mac_tail, endpoint);
+ if (endpoint->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (endpoint->timeout_task);
+ plugin->mac_count--;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan mac endpoints"), plugin->mac_count, GNUNET_NO);
+ GNUNET_free (endpoint);
- session->pending_messages_head = newmsg;
+}
- } else {
- //next at the tail should be NULL
- GNUNET_assert(tailmsg->next == NULL);
+/**
+ * function to free a session
+ * @param plugin pointer to the plugin
+ * @param queue pointer to the sessionqueue element to free
+ * @param free_macendpoint if GNUNET_YES and mac endpoint would be empty, free mac endpoint
+ */
+static void
+free_session (struct Plugin *plugin, struct Sessionqueue *queue,
+ int do_free_macendpoint)
+{
+ struct Sessionqueue *pendingsession;
+ struct Sessionqueue *pendingsession_tmp;
+ struct PendingMessage *pm;
+ struct MacEndpoint *endpoint;
+ struct FragmentMessage *fm;
+ struct FragmentMessage *fmnext;
+ int check = 0;
+
+ GNUNET_assert (plugin != NULL);
+ 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;
+ pendingsession = pendingsession->next;
+ GNUNET_assert (pendingsession_tmp->content != NULL);
+ if (pendingsession_tmp->content == queue->content)
+ {
+ plugin->pendingsessions--;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail,
+ pendingsession_tmp);
+ GNUNET_free (pendingsession_tmp);
+
+ GNUNET_assert (check == 0);
+ check = 1;
+ }
+ }
- //queue the msg
- tailmsg->next = newmsg;
+ endpoint = queue->content->mac;
+ fm = endpoint->sending_messages_head;
+ while (fm != NULL)
+ {
+ fmnext = fm->next;
+ if (fm->session == queue->content)
+ {
+ free_fragment_message (plugin, fm);
+ }
+ fm = fmnext;
}
- process_pending_messages(plugin);
+ // remove PendingMessage
+ pm = queue->content->pending_message_head;
+ while (pm != NULL)
+ {
+ GNUNET_CONTAINER_DLL_remove (queue->content->pending_message_head,
+ queue->content->pending_message_tail, pm);
+ GNUNET_free (pm->msg);
+ GNUNET_free (pm);
+ pm = queue->content->pending_message_head;
+ }
+ GNUNET_CONTAINER_DLL_remove (endpoint->sessions_head, endpoint->sessions_tail,
+ queue);
+ //Check that no ohter session on this endpoint for this session exits
+ GNUNET_assert(search_session(plugin, endpoint, &queue->content->target) == NULL);
+ if (endpoint->sessions_head == NULL && do_free_macendpoint == GNUNET_YES)
+ {
+ free_macendpoint (plugin, endpoint);
+ //check if no endpoint with the same address exists
+ GNUNET_assert(get_macendpoint(plugin, &endpoint->addr, GNUNET_NO) == NULL);
+ }
- //FIXME not the correct size
- return msgbuf_size;
+ if (queue->content->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (queue->content->timeout_task);
+ GNUNET_free (queue);
+ check_fragment_queue (plugin);
}
-
-
/**
* Function that can be used to force the plugin to disconnect
* from the given peer and cancel all previous transmissions
* @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)
- {
- // sesion found
- // remove PendingMessage
- while (queue->content->pending_messages_head != NULL){
- pm = queue->content->pending_messages_head;
- free_acks(pm);
- GNUNET_CONTAINER_DLL_remove(queue->content->pending_messages_head,queue->content->pending_messages_tail, pm);
- GNUNET_free(pm);
-
- }
-
- GNUNET_free(queue->content);
- GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
- GNUNET_free(queue);
-
- return;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
- }
+ struct Plugin *plugin = cls;
+ struct Sessionqueue *queue;
+ struct Sessionqueue *queue_next;
+ struct MacEndpoint *endpoint = plugin->mac_head;
+ struct MacEndpoint *endpoint_next;
+
+ // just look at all the session for the needed one
+ while (endpoint != NULL)
+ {
+ queue = endpoint->sessions_head;
+ endpoint_next = endpoint->next;
+ while (queue != NULL)
+ {
+ // content is never NULL
+ GNUNET_assert (queue->content != NULL);
+ queue_next = queue->next;
+ if (memcmp
+ (target, &(queue->content->target),
+ sizeof (struct GNUNET_PeerIdentity)) == 0)
+ {
+ free_session (plugin, queue, GNUNET_YES);
+ }
+ // try next
+ queue = queue_next;
+ }
+ endpoint = endpoint_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;
+ const unsigned char *input;
+
+ //GNUNET_assert(cls !=NULL);
+ if (addrlen != sizeof(struct MacAddress))
+ {
+ /* invalid address (MAC addresses have 6 bytes) */
+ //GNUNET_break (0);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_plugin_address_pretty_printer got size: %u, worng size!\n",
+ addrlen);
+#endif
+ asc(asc_cls, NULL);
+ return;
+ }
+ input = (const unsigned char *) addr;
+ GNUNET_asprintf (&ret,
+ "Transport %s: %s Mac-Address %.2X:%.2X:%.2X:%.2X:%.2X:%.2X",type,
+ PROTOCOL_PREFIX, input[0], input[1], input[2], input[3],
+ input[4], input[5]);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_plugin_address_pretty_printer got size: %u, nummeric %u, type %s; made string: %s\n",
+ addrlen, numeric, type, ret);
+#endif
+ asc ( asc_cls, ret);
+ //only one mac address per plugin
+ asc ( asc_cls, NULL);
+}
+
+
+
+/**
+ * handels the data after all fragments are put together
+ * @param cls macendpoint this messages belongs to
+ * @param hdr pointer to the data
+ */
+static void
+wlan_data_message_handler (void *cls, const struct GNUNET_MessageHeader *hdr)
{
- char ret[92];
- const unsigned char * input;
-
- GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ struct MacEndpoint *endpoint = (struct MacEndpoint *) cls;
+ struct Plugin *plugin = endpoint->plugin;
+ struct WlanHeader *wlanheader;
+ struct Session *session;
+
+ const struct GNUNET_MessageHeader *temp_hdr;
+ struct GNUNET_PeerIdentity tmpsource;
+ int crc;
+
+ GNUNET_assert (plugin != NULL);
+
+ if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ {
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "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))
{
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- asc (asc_cls, NULL);
+ //packet not big enought
+ return;
+ }
+
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan whole messages received"), 1, GNUNET_NO);
+ wlanheader = (struct WlanHeader *) hdr;
+
+ session = search_session (plugin, endpoint, &wlanheader->source);
+
+ temp_hdr = (const struct GNUNET_MessageHeader *) &wlanheader[1];
+ crc = ntohl (wlanheader->crc);
+ wlanheader->crc = 0;
+ if (getcrc32 ((char *) wlanheader, ntohs (wlanheader->header.size)) != crc)
+ {
+ //wrong crc, dispose message
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME,
+ "Wlan message header crc was wrong: %u != %u\n",
+ getcrc32 ((char *) wlanheader,
+ ntohs (wlanheader->header.size)), crc);
+ hexdump ((void *) hdr, ntohs (hdr->size));
+ return;
+ }
+
+ //if not in session list
+ if (session == NULL)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "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,
+ &tmpsource) == GNUNET_OK)
+ {
+ session = create_session (plugin, endpoint, &tmpsource);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "WLAN client not in session list and hello message is not okay\n");
+ return;
+ }
+
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "WLAN client not in session list and not a hello message\n");
+ return;
+ }
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "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
+
+ if (memcmp
+ (&wlanheader->source, &session->target,
+ sizeof (struct GNUNET_PeerIdentity)) != 0)
+ {
+ //wrong peer id
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "WLAN peer source id doesn't match packet peer source id: session %p\n",
+ session);
+#endif
+ return;
+ }
+
+ if (memcmp
+ (&wlanheader->target, plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity)) != 0)
+ {
+ //wrong peer id
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "WLAN peer target id doesn't match our peer id: session %p\n",
+ session);
+#endif
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_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_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "wlan_data_message_handler got wrong message type: %u\n",
+ ntohs (hdr->size));
+ return;
+ }
+}
/**
- * Another peer has suggested an address for this
- * peer and transport plugin. Check that this could be a valid
- * address. If so, consider adding it to the list
- * of addresses.
- *
- * @param cls closure
- * @param addr pointer to the address
- * @param addrlen length of addr
- * @return GNUNET_OK if this is a plausible address for this peer
- * and transport
+ * function to process the a message, give it to the higher layer
+ * @param cls pointer to the plugin
+ * @param client pointer to the session this message belongs to
+ * @param hdr start of the message
*/
+//TODO ATS informations
+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;
-static int
-wlan_plugin_address_suggested (void *cls,
- const void *addr,
- size_t addrlen)
-{
- //struct Plugin *plugin = cls;
+ struct GNUNET_ATS_Information distance;
- /* check if the address is plausible; if so,
- add it to our list! */
+ distance.type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
+ distance.value = htonl (1);
- 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;
- }
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Calling plugin->env->receive for session %p; %s; size: %u\n",
+ session, wlan_plugin_address_to_string (NULL,
+ session->mac->
+ addr.mac, 6),
+ htons (hdr->size));
+#endif
- return GNUNET_SYSERR;
+ plugin->env->receive (plugin->env->cls, &(session->target), hdr,
+ (const struct GNUNET_ATS_Information *)
+ &distance, 1, session,
+ (const char *) &session->mac->addr,
+ sizeof (session->mac->addr));
}
-
/**
- * 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.
+ * Function used for to process the data received from the wlan interface
*
- * @param cls closure
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
+ * @param cls the plugin handle
+ * @param session_light pointer to the struct holding known informations
+ * @param hdr hdr of the GNUNET_MessageHeader
+ * @param rxinfo pointer to the radiotap informations got with this packet
*/
-static const char*
-wlan_plugin_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
+static void
+wlan_data_helper (void *cls, struct Session_light *session_light,
+ const struct GNUNET_MessageHeader *hdr,
+ const struct Radiotap_rx *rxinfo)
{
- char ret[92];
- const unsigned char * input;
-
- GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ struct Plugin *plugin = cls;
+ struct FragmentMessage *fm;
+ struct FragmentMessage *fm2;
+ struct GNUNET_PeerIdentity tmpsource;
+
+ GNUNET_assert(plugin != NULL);
+
+ //ADVERTISEMENT
+ if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_HELLO)
+ {
+
+ //TODO better DOS protection, error handling
+ //TODO test first than create session
+ GNUNET_assert (session_light != NULL);
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_HELLO size: %u; %s\n",
+ ntohs (hdr->size), wlan_plugin_address_to_string (NULL,
+ session_light->addr.
+ mac, 6));
+#endif
+
+ if (session_light->macendpoint == NULL)
{
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- return NULL;
+ session_light->macendpoint =
+ get_macendpoint (plugin, &session_light->addr, GNUNET_YES);
}
- 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);
-}
+ if (GNUNET_HELLO_get_id
+ ((const struct GNUNET_HELLO_Message *) hdr,
+ &tmpsource) == GNUNET_OK)
+ {
+ session_light->session = search_session (plugin, session_light->macendpoint, &tmpsource);
+ if (session_light->session == NULL)
+ {
+ session_light->session = create_session (plugin, session_light->macendpoint, &tmpsource);
+ }
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan hello messages received"), 1, GNUNET_NO);
+ plugin->env->receive(plugin->env->cls,&session_light->session->target,hdr, NULL, 0, session_light->session,
+ (const char *) &session_light->session->mac->addr,
+ sizeof (session_light->session->mac->addr));
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME,
+ "WLAN client not in session list and hello message is not okay\n");
+ return;
+ }
+ }
-/**
- * Function used for to process the data from the suid process
- */
-//TODO doxigen
+ //FRAGMENT
-static void
-wlan_process_helper (void *cls,
- void *client,
- 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);
+ else if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_FRAGMENT)
+ {
+
+ GNUNET_assert (session_light != NULL);
+ if (session_light->macendpoint == NULL)
+ {
+ session_light->macendpoint =
+ get_macendpoint (plugin, &session_light->addr, GNUNET_YES);
+ }
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_FRAGMENT with size: %u; mac endpoint %p: %s\n",
+ ntohs (hdr->size), session_light->macendpoint,
+ wlan_plugin_address_to_string (NULL,
+ session_light->addr.mac,
+ 6));
+#endif
+
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan fragments received"), 1, GNUNET_NO);
+ int ret =
+ GNUNET_DEFRAGMENT_process_fragment (session_light->macendpoint->defrag,
+ hdr);
+
+ if (ret == GNUNET_NO)
+ {
+ session_light->macendpoint->dups++;
+ }
+ else if (ret == GNUNET_OK)
+ {
+ session_light->macendpoint->fragc++;
+ }
+ set_next_send (plugin);
+
+ }
+
+ //ACK
+
+ else if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_FRAGMENT_ACK)
+ {
+ GNUNET_assert (session_light != NULL);
+ if (session_light->macendpoint == NULL)
+ {
+ session_light->macendpoint =
+ get_macendpoint (plugin, &session_light->addr, GNUNET_NO);
+ }
+
+ if (session_light->macendpoint == NULL)
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Macendpoint does not exist for this GNUNET_MESSAGE_TYPE_FRAGMENT_ACK size: %u; %s\n",
+ ntohs (hdr->size), wlan_plugin_address_to_string (NULL,
+ session_light->addr.mac,
+ 6));
+#endif
+ return;
+ }
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_FRAGMENT_ACK size: %u; mac endpoint: %p; %s\n",
+ ntohs (hdr->size), session_light->macendpoint,
+ wlan_plugin_address_to_string (NULL,
+ session_light->addr.mac,
+ 6));
+#endif
+ fm = session_light->macendpoint->sending_messages_head;
+ while (fm != NULL)
+ {
+ fm2 = fm->next;
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan acks received"), 1, GNUNET_NO);
+ int ret = GNUNET_FRAGMENT_process_ack (fm->fragcontext, hdr);
+
+ if (ret == GNUNET_OK)
+ {
+#if DEBUG_wlan_retransmission > 1
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Got last ack, finished fragment message %p\n", fm);
+#endif
+ session_light->macendpoint->acks++;
+ fm->session->last_activity = GNUNET_TIME_absolute_get ();
+ session_light->macendpoint->last_activity = fm->session->last_activity;
+ free_fragment_message (plugin, fm);
+ check_fragment_queue (plugin);
+ return;
+ }
+ if (ret == GNUNET_NO)
+ {
+#if DEBUG_wlan_retransmission > 1
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Got ack for: %p\n", fm);
+#endif
+ session_light->macendpoint->acks++;
+ return;
+ }
+ if (ret == GNUNET_SYSERR)
+ {
+
+ }
+
+ fm = fm2;
}
+#if DEBUG_wlan_retransmission > 1
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "WLAN fragment not in fragment list\n");
+#endif
+ return;
- } else {
+ }
+ else
+ {
// TODO Wrong data?
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME,
+ "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 0
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Helper finished\n");
+#endif
+
}
+/**
+ * Function to print mac addresses nice *
+ * @param pointer to 6 byte with the mac address
+ * @return pointer to the chars which hold the print out
+ */
+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 for the scheduler if a mac endpoint times out
+ * @param cls pointer to the MacEndpoint
+ * @param tc pointer to the GNUNET_SCHEDULER_TaskContext
+ */
static void
-wlan_plugin_helper_read (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Plugin *plugin = cls;
- char mybuf[WLAN_MTU];
- ssize_t bytes;
+ struct MacEndpoint *endpoint = cls;
+ GNUNET_assert (endpoint != NULL);
+ endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK;
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
- 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);
-
+ }
+ if (GNUNET_TIME_absolute_get_remaining
+ (GNUNET_TIME_absolute_add
+ (endpoint->last_activity, MACENDPOINT_TIMEOUT)).rel_value == 0)
+ {
+ GNUNET_assert(endpoint->plugin != NULL);
+ GNUNET_STATISTICS_update (endpoint->plugin->env->stats, _("# wlan mac endpoints timeouts"), 1, GNUNET_NO);
+ free_macendpoint (endpoint->plugin, endpoint);
+ }
+ else
+ {
+ endpoint->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout,
+ endpoint);
+ }
}
+/**
+ * function to create an macendpoint
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the macaddress
+ * @return returns a macendpoint
+ */
+static struct MacEndpoint *
+create_macendpoint (struct Plugin *plugin, const struct MacAddress *addr)
+{
+ struct MacEndpoint *newend = GNUNET_malloc (sizeof (struct MacEndpoint));
+
+ GNUNET_assert(plugin != NULL);
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan mac endpoints created"), 1, GNUNET_NO);
+ newend->addr = *addr;
+ newend->plugin = plugin;
+ newend->addr = *addr;
+ newend->fragment_messages_out_count = 0;
+ newend->defrag =
+ GNUNET_DEFRAGMENT_context_create (plugin->env->stats, WLAN_MTU,
+ MESSAGES_IN_DEFRAG_QUEUE_PER_MAC,
+ newend, &wlan_data_message_handler,
+ &add_ack_for_send);
+ newend->last_activity = GNUNET_TIME_absolute_get ();
+ newend->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout,
+ newend);
+
+ plugin->mac_count++;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan mac endpoints"), plugin->mac_count, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_insert_tail (plugin->mac_head, plugin->mac_tail, newend);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "New Mac Endpoint %p: %s\n", newend,
+ wlan_plugin_address_to_string (NULL, newend->addr.mac, 6));
+#endif
+ return newend;
+}
/**
- * Start the gnunet-wlan-helper process.
- *
- * @param plugin the transport plugin
+ * Function used for to process the data from the suid process
*
- * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
+ * @param cls the plugin handle
+ * @param client client that send the data (not used)
+ * @param hdr header of the GNUNET_MessageHeader
*/
-static int
-wlan_transport_start_wlan_helper (struct Plugin *plugin)
+static void
+wlan_process_helper (void *cls, void *client,
+ const struct GNUNET_MessageHeader *hdr)
{
+ struct Plugin *plugin = cls;
+ struct ieee80211_frame *wlanIeeeHeader = NULL;
+ struct Session_light *session_light = NULL;
+ struct Radiotap_rx *rxinfo;
+ const struct GNUNET_MessageHeader *temp_hdr = NULL;
+
+ int datasize = 0;
+ int pos;
+
+ GNUNET_assert(plugin != NULL);
+ switch (ntohs (hdr->type))
+ {
+ case GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA:
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_process_helper got GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA size: %u\n",
+ ntohs (hdr->size));
+#endif
- plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_NO, GNUNET_YES);
- if (plugin->server_stdout == NULL)
- return GNUNET_SYSERR;
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan WLAN_HELPER_DATA received"), 1, GNUNET_NO);
+ //call wlan_process_helper with the message inside, later with wlan: analyze signal
+ if (ntohs (hdr->size) <
+ sizeof (struct ieee80211_frame) + 2*sizeof (struct GNUNET_MessageHeader) +
+ sizeof (struct Radiotap_rx))
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "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;
+ }
- plugin->server_stdin = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO);
- if (plugin->server_stdin == NULL)
- return GNUNET_SYSERR;
+ rxinfo = (struct Radiotap_rx *) &hdr[1];
+ wlanIeeeHeader = (struct ieee80211_frame *) &rxinfo[1];
+
+ //process only if it is an broadcast or for this computer both with the gnunet bssid
-#if DEBUG_TCP_NAT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting gnunet-wlan-helper process cmd: %s %s\n", "gnunet-wlan-helper", plugin->interface);
+ //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))
+ {
+ //if packet is from us return
+ if ((memcmp (&(wlanIeeeHeader->i_addr2), &(plugin->mac_address),
+ sizeof (struct MacAddress)) == 0)){
+ return;
+ }
+ // process the inner data
+
+
+ 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);
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan messaged for this client received"), 1, GNUNET_NO);
+
+ pos = 0;
+ while (pos < datasize)
+ {
+ temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1] + pos;
+ if (ntohs(temp_hdr->size) <= datasize + pos)
+ {
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan messaged inside WLAN_HELPER_DATA received"), 1, GNUNET_NO);
+ wlan_data_helper (plugin, session_light, temp_hdr, rxinfo);
+ }
+ else
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Size of packet is too small; size: %u > size of packet: %u\n",
+ ntohs(temp_hdr->size),datasize + pos);
#endif
- /* Start the server process */
- plugin->server_pid = GNUNET_OS_start_process(plugin->server_stdin, plugin->server_stdout, "gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", plugin->interface, NULL);
- if (plugin->server_pid == GNUNET_SYSERR)
+ }
+ pos += ntohs (temp_hdr->size);
+
+ }
+
+ //clean up
+ GNUNET_free (session_light);
+ }
+ else
+ {
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_process_helper got wrong MAC: %s\n",
+ macprinter (wlanIeeeHeader->i_addr1));
+#endif
+ }
+ }
+ else
{
-#if DEBUG_TCP_NAT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to start gnunet-wlan-helper process\n");
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_process_helper got wrong BSSID: %s\n",
+ macprinter (wlanIeeeHeader->i_addr2));
#endif
- return GNUNET_SYSERR;
}
- /* Close the write end of the read pipe */
- GNUNET_DISK_pipe_close_end(plugin->server_stdout, GNUNET_DISK_PIPE_END_WRITE);
+ break;
+ case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL:
+ //TODO more control messages
+ 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_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "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, GNUNET_YES,
+ &plugin->mac_address,
+ sizeof (struct MacAddress));
+ break;
+ default:
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "Func wlan_process_helper got unknown message with number %u, size %u\n",
+ ntohs (hdr->type), ntohs (hdr->size));
- /* Close the read end of the write pipe */
- GNUNET_DISK_pipe_close_end(plugin->server_stdin, GNUNET_DISK_PIPE_END_READ);
+#endif
+#if DEBUG_wlan_msg_dump > 1
+ hexdump (hdr, GNUNET_MIN (ntohs (hdr->size), 256));
+#endif
+ GNUNET_break (0);
+ return;
+ }
+}
- 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);
+/**
+ * Exit point from the plugin.
+ * @param cls pointer to the api struct
+ */
- plugin->server_read_task =
- GNUNET_SCHEDULER_add_read_file (plugin->env->sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin);
- return GNUNET_YES;
-}
+//FIXME cleanup
+void *
+libgnunet_plugin_transport_wlan_done (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+ struct MacEndpoint *endpoint = plugin->mac_head;
+ struct MacEndpoint *endpoint_next;
+
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "libgnunet_plugin_transport_wlan_done started\n");
+#endif
+
+ wlan_transport_stop_wlan_helper(plugin);
+ GNUNET_assert (cls != NULL);
+ //free sessions
+ while (endpoint != NULL)
+ {
+ endpoint_next = endpoint->next;
+ free_macendpoint (plugin, endpoint);
+ endpoint = endpoint_next;
+ }
+
+
+ if (plugin->suid_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->suid_tokenizer);
+
+ if (plugin->data_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->data_tokenizer);
+
+ GNUNET_free_non_null (plugin->interface);
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
+}
/**
* Entry point for the plugin.
* @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error
*/
void *
-gnunet_plugin_transport_wlan_init (void *cls)
+libgnunet_plugin_transport_wlan_init (void *cls)
{
- struct GNUNET_SERVICE_Context *service;
+ //struct GNUNET_SERVICE_Context *service;
struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
struct GNUNET_TRANSPORT_PluginFunctions *api;
struct Plugin *plugin;
- GNUNET_assert(cls !=NULL);
-
- service = GNUNET_SERVICE_start ("transport-wlan", env->sched, env->cfg);
- if (service == NULL){
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to start service for `%s' transport plugin.\n"),
- "wlan");
- return NULL;
- }
+ GNUNET_assert (cls != NULL);
plugin = GNUNET_malloc (sizeof (struct Plugin));
plugin->env = env;
plugin->pendingsessions = 0;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ plugin->mac_count = 0;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan mac endpoints"), plugin->mac_count, GNUNET_NO);
+ 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;
+ GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
+ GNUNET_BANDWIDTH_value_init (100 * 1024 *
+ 1024 / 8), 100);
- wlan_transport_start_wlan_helper(plugin);
- plugin->consoltoken = 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);
//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;
- start_next_message_id();
-
- return api;
-}
+ //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", &(plugin->testmode)))
+ plugin->testmode = 0; //default value
+ }
-/**
- * Exit point from the plugin.
- */
-//TODO doxigen
-void *
-gnunet_plugin_transport_wlan_done (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
+ 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;
+ }
+ }
- GNUNET_assert(cls !=NULL);
+ //start the plugin
+ wlan_transport_start_wlan_helper (plugin);
+ set_next_beacon_time (plugin);
+ set_next_send(plugin);
+#if DEBUG_wlan
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME,
+ "wlan init finished\n");
+#endif
- GNUNET_free_non_null(plugin->mac_address);
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
+ return api;
}
/* end of plugin_transport_wlan.c */
projects / oweals / gnunet.git / blobdiff