/*
- 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 "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 FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
+#define SESSION_TIMEOUT GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT
-#define FRAGMENT_QUEUE_SIZE 10
+/**
+ * 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_YES
+/**
+ * scaling factor for restarting the helper
+ */
+#define HELPER_RESTART_SCALING_FACTOR 2
-#define MESSAGE_LENGHT_UNKNOWN -1
-#define NO_MESSAGE_OR_MESSAGE_FINISHED -2
+/**
+ * max size of fragment queue
+ */
+#define FRAGMENT_QUEUE_SIZE 10
+/**
+ * max messages in fragment queue per session/client
+ */
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1
+/**
+ * max messages in fragment queue per MAC
+ */
+#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT 1
/**
- * After how long do we expire an address that we
- * learned from another peer if it is not reconfirmed
- * by anyone?
+ * max messages in in queue
+ */
+#define MESSAGES_IN_QUEUE_SIZE 10
+/**
+ * max messages in in queue per session/client
*/
-#define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
+#define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 1
/**
- * Initial handshake message for a session.
+ * LLC fields for better compatibility
*/
-struct WelcomeMessage
-{
- /**
- * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME.
- */
- struct GNUNET_MessageHeader header;
+#define WLAN_LLC_DSAP_FIELD 0x1f
+#define WLAN_LLC_SSAP_FIELD 0x1f
- /**
- * Identit*mac_y of the node connecting (TCP client)
- */
- struct GNUNET_PeerIdentity clientIdentity;
+/**
+ * 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
+
+
+#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;
/**
- * Number of sessions
+ * Number of connections
*/
-
- int session_count;
+ unsigned int mac_count;
/**
- * encapsulation to the local wlan server prog
+ * encapsulation of data from the local wlan helper program
*/
+ struct GNUNET_SERVER_MessageStreamTokenizer *suid_tokenizer;
- struct GNUNET_SERVER_MessageStreamTokenizer * consoltoken;
-
+ /**
+ * encapsulation of packets received from the wlan helper
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer *data_tokenizer;
/**
* stdout pipe handle for the gnunet-wlan-helper process
*/
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.
*/
/**
* 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
unsigned int pendingsessions;
/**
- * Messages in the fragmentation queue, head
+ * Messages in the sending queues
*/
+ int pending_Fragment_Messages;
- struct FragmentMessage * pending_Fragment_Messages_head;
+ /**
+ * messages ready for send, head
+ */
+ struct FragmentMessage_queue *sending_messages_head;
+ /**
+ * messages ready for send, tail
+ */
+ struct FragmentMessage_queue *sending_messages_tail;
+ /**
+ * time of the next "hello-beacon"
+ */
+ struct GNUNET_TIME_Absolute beacon_time;
/**
- * Messages in the fragmentation queue, tail
+ * queue to send acks for received fragments (head)
*/
+ struct AckSendQueue *ack_send_queue_head;
- struct FragmentMessage * pending_Fragment_Messages_tail;
+ /**
+ * queue to send acks for received fragments (tail)
+ */
+ struct AckSendQueue *ack_send_queue_tail;
/**
- * number of pending fragment message
- */
+ * Tracker for bandwidth limit
+ */
+ struct GNUNET_BANDWIDTH_Tracker tracker;
+};
- unsigned int pending_fragment_messages;
+/**
+ * Struct to store data if file write did not accept the whole packet
+ */
+struct Finish_send
+{
+ /**
+ * pointer to the global plugin struct
+ */
+ struct Plugin *plugin;
/**
- * time of the next "hello-beacon"
+ * head of the next part to send to the helper
*/
+ char *head_of_next_write;
- struct GNUNET_TIME_Absolute beacon_time;
+ /**
+ * Start of the message to send, needed for free
+ */
+ struct GNUNET_MessageHeader *msgstart;
+ /**
+ * rest size to send
+ */
+ 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;
+ struct Sessionqueue *next;
+ struct Sessionqueue *prev;
+ struct Session *content;
};
/**
- * Queue of ack received for messages send
+ * Queue of fragmented messages, for the sending queue of the plugin
*/
-
-struct AckQueue
+//TODO DOXIGEN
+struct FragmentMessage_queue
{
- struct AckQueue * next;
- struct AckQueue * prev;
- int fragment_num; //TODO change it to offset if better
+ 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;
+};
-struct RecQueue
+//TODO DOXIGEN
+struct MacEndpoint_id_fragment_triple
{
- struct RecQueue * next;
- struct RecQueue * prev;
- uint16_t num;
- const char * msg;
- uint16_t size;
+ struct MacEndpoint *endpoint;
+ uint32_t message_id;
+ struct FragmentMessage *fm;
+};
+
+//TODO DOXIGEN
+struct Plugin_Session_pair
+{
+ struct Plugin *plugin;
+ struct Session *session;
};
/**
*/
struct PendingMessage
{
+ /**
+ * dll next
+ */
+ struct PendingMessage *next;
+ /**
+ * dll prev
+ */
+ struct PendingMessage *prev;
/**
* The pending message
*/
- 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
+{
+
/**
- * Size of the message
+ * next ack in the ack send queue
*/
- size_t message_size;
+ struct AckSendQueue *next;
+ /**
+ * previous ack in the ack send queue
+ */
+ struct AckSendQueue *prev;
+ /**
+ * pointer to the session this ack belongs to
+ */
+ struct MacEndpoint *endpoint;
+ /**
+ * ID of message, to distinguish between the messages, picked randomly.
+ */
+ uint32_t message_id;
+ /**
+ * 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;
};
/**
/**
* the session this message belongs to
*/
- struct Session * session;
+ struct Session *session;
/**
* peer mac address
*/
- uint8_t addr[6];
+ struct MacAddress addr;
+
+ /**
+ * mac endpoint
+ */
+ struct MacEndpoint *macendpoint;
};
/**
struct SessionHeader header;
/**
- * Pointer to the global plugin struct.
+ * Message currently pending for transmission
+ * to this peer, if any. head
*/
- struct Plugin *plugin;
+ struct PendingMessage *pending_message_head;
/**
* Message currently pending for transmission
- * to this peer, if any.
+ * to this peer, if any. tail
*/
- struct PendingMessage *pending_message;
+ struct PendingMessage *pending_message_tail;
/**
* To whom are we talking to (set to our identity
struct GNUNET_PeerIdentity target;
/**
- * encapsulation of the receive data
+ * Address of the other peer (either based on our 'connect'
+ * call or on our 'accept' call).
*/
- //struct GNUNET_SERVER_MessageStreamTokenizer * receive_token;
+ void *connect_addr;
/**
- * offset of the next fragment for the receive_token, -1 means last message finished
+ * Last activity on this connection. Used to select preferred
+ * connection and timeout
*/
-
- //int rec_offset;
+ struct GNUNET_TIME_Absolute last_activity;
/**
- * size of the message received,
- * MESSAGE_LENGHT_UNKNOWN means that the size is not known,
- * NO_MESSAGE_OR_MESSAGE_FINISHED means no message received
+ * Timeout task.
*/
-
- int rec_size;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
/**
- * Sorted queue with the fragments received; head
+ * peer connection
*/
-
- struct RecQueue * frag_head;
+ struct MacEndpoint *mac;
/**
- * Sorted queue with the fragments received; tail
+ * count of messages in the fragment out queue for this session
*/
- struct RecQueue * frag_tail;
+ int fragment_messages_out_count;
+};
+
+/**
+ * Struct to represent one network card connection
+ */
+struct MacEndpoint
+{
/**
- * peer mac address
+ * Pointer to the global plugin struct.
*/
- char addr[6];
-
+ struct Plugin *plugin;
/**
- * Address of the other peer (either based on our 'connect'
- * call or on our 'accept' call).
+ * Struct to hold the session reachable over this mac; head
*/
- void *connect_addr;
-
+ struct Sessionqueue *sessions_head;
/**
- * Last activity on this connection. Used to select preferred
- * connection.
+ * Struct to hold the session reachable over this mac; tail
*/
- struct GNUNET_TIME_Absolute last_activity;
-
+ struct Sessionqueue *sessions_tail;
/**
- * current number for message incoming, to distinguish between the messages
+ * Messages currently sending
+ * to a peer, if any.
*/
- uint32_t message_id_in;
+ struct FragmentMessage *sending_messages_head;
/**
- * current number for message outgoing, to distinguish between the messages
+ * Messages currently sending
+ * to a peer (tail), if any.
*/
- uint32_t message_id_out;
-
+ struct FragmentMessage *sending_messages_tail;
/**
- * does this session have a message in the fragment queue
+ * dll next
*/
+ struct MacEndpoint *next;
+ /**
+ * dll prev
+ */
+ struct MacEndpoint *prev;
- int has_fragment;
-
-};
-
-
-
-
-struct FragmentMessage
-{
- /**
- * Session this message belongs to
- */
-
- struct Session *session;
-
- /**
- * This is a doubly-linked list.
- */
- struct FragmentMessage *next;
-
- /**
- * This is a doubly-linked list.
- */
- struct FragmentMessage *prev;
-
- /**
- * The pending message
- */
- char *msg;
-
- /**
- * Timeout value for the pending message.
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Timeout value for the pending fragments.
- * Stores the time when the next msg fragment ack has to be received
- */
- struct GNUNET_TIME_Absolute next_ack;
-
- /**
- * Sorted queue with the acks received for fragments; head
- */
-
- struct AckQueue * head;
-
- /**
- * Sorted queue with the acks received for fragments; tail
- */
-
- struct AckQueue * tail;
+ /**
+ * peer mac address
+ */
+ struct MacAddress addr;
- /**
- * Size of the message
- */
- size_t message_size;
+ /**
+ * Defrag context for this mac endpoint
+ */
+ struct GNUNET_DEFRAGMENT_Context *defrag;
- /**
- * pos / next fragment number in the message, for fragmentation/segmentation,
- * some acks can be missing but there is still time
- */
- uint32_t message_pos;
+ /**
+ * count of messages in the fragment out queue for this mac endpoint
+ */
-};
+ int fragment_messages_out_count;
-/**
- * Header for messages which need fragmentation
- */
-struct WlanHeader
-{
+ //TODO DOXIGEN
+ uint8_t rate;
+ uint16_t tx_power;
+ uint8_t antenna;
- struct GNUNET_MessageHeader header;
+ /**
+ * Duplicates received
+ */
+ int dups;
/**
- * checksum/error correction
+ * Fragments received
*/
- uint32_t crc GNUNET_PACKED;
+ int fragc;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * Acks received
*/
- struct GNUNET_PeerIdentity target;
+ int acks;
- // followed by payload
+ /**
+ * Last activity on this endpoint. Used to select preferred
+ * connection.
+ */
+ struct GNUNET_TIME_Absolute last_activity;
+ /**
+ * Timeout task.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
};
/**
- * Header for messages which need fragmentation
+ * Struct for Messages in the fragment queue
*/
-struct FragmentationHeader
+
+struct FragmentMessage
{
- struct GNUNET_MessageHeader header;
+ /**
+ * Session this message belongs to
+ */
+
+ struct Session *session;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * This is a doubly-linked list.
*/
- // struct GNUNET_PeerIdentity target GNUNET_PACKED;
+ struct FragmentMessage *next;
/**
- * ID of message, to distinguish between the messages, picked randomly.
+ * This is a doubly-linked list.
*/
- uint32_t message_id GNUNET_PACKED;
+ struct FragmentMessage *prev;
/**
- * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
+ * Fragmentation context
*/
- uint16_t fragment_off_or_num GNUNET_PACKED;
+ struct GNUNET_FRAGMENT_Context *fragcontext;
/**
- * CRC of fragment (for error checking)
+ * Timeout value for the message.
*/
- uint16_t message_crc GNUNET_PACKED;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * 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
+ * Timeout task.
*/
- // uint32_t flags GNUNET_PACKED;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
/**
- * checksum/error correction
+ * Fragment to send
*/
- // uint32_t crc GNUNET_PACKED;
+ char *frag;
- // followed by payload unless ACK
+ /**
+ * 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;
};
-//enum { ACK_FRAGMENT = 1, DATA_FRAGMENT = 2, LAST_FRAGMENT = 4, NEW_MESSAGE = 8 };
-
-int
-getRadiotapHeader(struct RadiotapHeader * Header);
-
-int
-getWlanHeader(struct IeeeHeader * Header);
-
-static int
-wlan_plugin_address_suggested(void *cls, const void *addr, size_t addrlen);
-
-uint16_t
-getcrc16(const char *msgbuf, size_t msgbuf_size);
-
-static void
-do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-static void
-check_fragment_queue(struct Plugin * plugin);
-
-uint32_t
-getcrc32(const char *msgbuf, size_t msgbuf_size);
-
static void
-free_rec_frag_queue(struct Session * session);
-
+do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
static void
-wlan_data_helper(void *cls, void * client, const struct GNUNET_MessageHeader * hdr);
+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
-wlan_process_helper (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr);
+finish_sending (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
/**
- * get the next message number, at the moment just a random one
+ * Generates a nice hexdump of a memory area.
*
+ * \param mem pointer to memory to dump
+ * \param length how many bytes to dump
*/
-//TODO doxigen
-uint32_t
-get_next_message_id()
+static void
+hexdump (const void *mem, unsigned length)
{
- return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
+ 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);
+ }
}
/**
- * start next message number generator
+ * 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
*/
-//TODO doxigen
-void
-start_next_message_id()
+static struct MacEndpoint *
+get_macendpoint (struct Plugin *plugin, const struct MacAddress *addr,
+ int create_new)
{
- //GNUNET_CRYPTO_random_init;
+ 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 addr
+ * search for a session with the macendpoint and peer id
*
* @param plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
+ * @param endpoint pointer to the mac endpoint of the peer
+ * @param peer pointer to the peerid
* @return returns the session
*/
-
static struct Session *
-search_session(struct Plugin *plugin, const uint8_t * addr)
+search_session (struct Plugin *plugin, const struct MacEndpoint *endpoint,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * lastitem = NULL;
+ GNUNET_assert (endpoint != NULL);
+ struct Sessionqueue *queue = endpoint->sessions_head;
- //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;
- }
+ {
+ 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 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
+session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ 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);
+ }
+}
+
/**
* create a new session
*
* @param plugin pointer to the plugin struct
- * @param addr pointer to the mac address of the peer
+ * @param endpoint pointer to the mac endpoint of the peer
+ * @param peer peer identity to use for this session
* @return returns the session
*/
static struct Session *
-create_session(struct Plugin *plugin,const uint8_t * addr)
+create_session (struct Plugin *plugin, struct MacEndpoint *endpoint,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue));
-
- GNUNET_CONTAINER_DLL_insert_tail(plugin->sessions, plugin->sessions_tail, queue);
+ 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);
- queue->content = GNUNET_malloc (sizeof (struct Session));
- queue->content->plugin = plugin;
- memcpy(queue->content->addr, addr, 6);
- queue->content->message_id_out = get_next_message_id();
- queue->content->has_fragment = 0;
- queue->content->rec_size = NO_MESSAGE_OR_MESSAGE_FINISHED;
+#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
- plugin->session_count++;
return queue->content;
}
/**
- * get Session from address, create if no session exists
+ * Get session from address, create if no session exists
*
* @param plugin pointer to the plugin struct
* @param addr pointer to the mac address of the peer
+ * @param peer pointer to the peerid
* @return returns the session
*/
-//TODO add other possibilities to find the right session (are there other?)
static struct Session *
-get_Session(struct Plugin *plugin, const uint8_t * addr)
+get_session (struct Plugin *plugin, const struct MacAddress *addr,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct Session * session = search_session(plugin, addr);
+ struct MacEndpoint *mac;
+
+ mac = get_macendpoint (plugin, addr, GNUNET_YES);
+ struct Session *session = search_session (plugin, mac, peer);
+
if (session != NULL)
- {
- return session;
- }
- // new session
- return create_session(plugin, addr);
-
- /* -- not needed, layer above already has it--
- //queue welcome message for new sessions, not realy needed
- //struct WelcomeMessage welcome;
- struct PendingMessage *pm;
- pm = GNUNET_malloc (sizeof (struct PendingMessage));
- pm->msg = GNUNET_malloc(GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->message_size = GNUNET_HELLO_size(* (plugin->env->our_hello));
- //welcome.header.size = htons (GNUNET_HELLO_size(* (plugin->env->our_hello)));
- //welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
- //welcome.clientIdentity = *plugin->env->my_identity;
- memcpy ( (pm->msg), * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello)));
- pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
- queue->content->pending_message = pm;
- plugin->pendingsessions ++;
- GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions, plugin->pending_Sessions_tail, queue);
-
- check_fragment_queue(plugin);
- */
+ return session;
+ return create_session (plugin, mac, peer);
}
/**
* Queue the session to send data
+ * checks if there is a message pending
+ * checks if this session is not allready in the queue
+ * @param plugin pointer to the plugin
+ * @param session pointer to the session to add
*/
-//TODO doxigen
static void
-queue_Session (struct Plugin *plugin,
- struct Session * session)
+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 ++;
+ struct Sessionqueue *queue = plugin->pending_Sessions_head;
-}
+ 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;
+ }
+
+ // Session is not in the queue
+
+ queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+ queue->content = session;
+
+ //insert at the tail
+ GNUNET_CONTAINER_DLL_insert_tail (plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail, queue);
+ plugin->pendingsessions++;
+ GNUNET_STATISTICS_set(plugin->env->stats, _("# wlan pending sessions"), plugin->pendingsessions, GNUNET_NO);
+ }
-//TODO doxigen
-static void
-free_acks (struct FragmentMessage * fm){
- struct AckQueue * fq;
- while (fm->head != NULL){
- fq = fm->head;
- GNUNET_CONTAINER_DLL_remove(fm->head, fm->tail, fq);
- GNUNET_free(fq);
- }
- //needed?
- fm->head = NULL;
- fm->tail = NULL;
}
-//TODO doxigen
/**
* Function to schedule the write task, executed after a delay
+ * @param cls pointer to the plugin struct
+ * @param tc GNUNET_SCHEDULER_TaskContext pointer
*/
static void
-delay_fragment_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+delay_fragment_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Plugin * plugin = cls;
+ struct Plugin *plugin = cls;
+
plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
// GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
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);
- }
+ {
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &do_transmit, plugin);
+ }
}
-//TODO doxigen
/**
* Function to calculate the time of the next periodic "hello-beacon"
+ * @param plugin pointer to the plugin struct
*/
+
static void
-set_next_beacon_time(struct Plugin * const plugin)
+set_next_beacon_time (struct Plugin *const plugin)
{
//under 10 known peers: once a second
- if (plugin->session_count < 10)
- {
- plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_SECONDS);
- }
+ 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->session_count < 30)
- {
- plugin->beacon_time = GNUNET_TIME_absolute_add(
- GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(
- GNUNET_TIME_UNIT_SECONDS, 10));
- }
+ 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_UNIT_MINUTES);
- }
-}
-
-
-//TODO doxigen
-struct GNUNET_TIME_Relative
-get_next_frag_timeout(struct FragmentMessage * fm)
-{
- return GNUNET_TIME_relative_min(GNUNET_TIME_absolute_get_remaining(
- fm->next_ack), GNUNET_TIME_absolute_get_remaining(fm->timeout));
-}
-
-//TODO doxigen
-/**
- * Function to get the timeout value for acks for this session
- */
-
-struct GNUNET_TIME_Relative
-get_ack_timeout (struct FragmentMessage * fm){
- return FRAGMENT_TIMEOUT;
+ {
+ plugin->beacon_time =
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_MINUTES,
+ HELLO_BEACON_SCALING_FACTOR));
+ }
}
-//TODO doxigen
/**
* Function to set the timer for the next timeout of the fragment queue
+ * @param plugin the handle to the plugin struct
*/
+
static void
-check_next_fragment_timeout(struct Plugin * const plugin)
+set_next_send (struct Plugin *const plugin)
{
- struct FragmentMessage * fm;
struct GNUNET_TIME_Relative next_send;
- next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
-
//cancel old task
if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
- }
- fm = plugin->pending_Fragment_Messages_head;
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_write_delay_task);
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
- GNUNET_assert(plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK);
+ //check if some acks are in the queue
+ if (plugin->ack_send_queue_head != NULL)
+ {
+ next_send = GNUNET_TIME_UNIT_ZERO;
+ }
//check if there are some fragments in the queue
- if (fm != NULL)
+ 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 (next_send.rel_value == GNUNET_TIME_UNIT_ZERO.rel_value)
+ {
+ if (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK)
+ {
+ plugin->server_write_task =
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->server_stdin_handle,
+ &do_transmit, plugin);
+ }
+ }
+ else
+ {
+ if (plugin->server_write_delay_task == GNUNET_SCHEDULER_NO_TASK)
{
- next_send
- = GNUNET_TIME_relative_min(next_send, get_next_frag_timeout(fm));
+ plugin->server_write_delay_task =
+ GNUNET_SCHEDULER_add_delayed (next_send, &delay_fragment_task,
+ plugin);
}
- plugin->server_write_delay_task = GNUNET_SCHEDULER_add_delayed(next_send,
- &delay_fragment_task, plugin);
+ }
}
-
-
-//TODO doxigen
/**
* Function to get the next queued Session, removes the session from the queue
+ * @param plugin pointer to the plugin struct
+ * @return pointer to the session found, returns NULL if there is now session in the queue
*/
-
static struct Session *
-get_next_queue_Session (struct Plugin * plugin){
- struct Session * session;
- struct Sessionqueue * sessionqueue;
- struct Sessionqueue * sessionqueue_alt;
- struct PendingMessage * pm;
- sessionqueue = plugin->pending_Sessions;
- while (sessionqueue != NULL){
- session = sessionqueue->content;
- pm = session->pending_message;
-
- //check for message timeout
- if (GNUNET_TIME_absolute_get_remaining(pm->timeout).rel_value > 0){
- //check if session has no message in the fragment queue
- if (! session->has_fragment){
- plugin->pendingsessions --;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, sessionqueue);
- GNUNET_free(sessionqueue);
-
- return session;
- } else {
- sessionqueue = sessionqueue->next;
- }
- } else {
-
- session->pending_message = NULL;
- //call the cont func that it did not work
- if (pm->transmit_cont != NULL)
- pm->transmit_cont (pm->transmit_cont_cls,
- &(session->target), GNUNET_SYSERR);
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
-
- sessionqueue_alt = sessionqueue;
- sessionqueue = sessionqueue->next;
- plugin->pendingsessions --;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, sessionqueue_alt);
-
- GNUNET_free(sessionqueue_alt);
-
- }
-
-
- }
- return NULL;
-}
-
-//TODO doxigen
-/**
- * Function to sort the message into the message fragment queue
- */
-static void
-sort_fragment_into_queue (struct Plugin * plugin, struct FragmentMessage * fm){
- struct FragmentMessage * fm2;
- //sort into the list at the right position
-
- fm2 = plugin->pending_Fragment_Messages_head;
-
- while (fm2 != NULL){
- if (GNUNET_TIME_absolute_get_difference(fm2->next_ack, fm->next_ack).rel_value == 0){
- break;
- } else {
- fm2 = fm2->next;
- }
- }
-
- GNUNET_CONTAINER_DLL_insert_after(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail,fm2,fm);
-}
-
-//TODO doxigen
-static void
-free_fragment_message(struct Plugin * plugin,struct FragmentMessage * fm)
+get_next_queue_session (struct Plugin *plugin)
{
- if (fm != NULL)
- {
- free_acks(fm);
- GNUNET_free_non_null(fm->msg);
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
- GNUNET_free(fm);
- plugin->pending_fragment_messages --;
- check_fragment_queue(plugin);
- }
-}
+ struct Session *session;
+ struct Sessionqueue *sessionqueue;
+ struct Sessionqueue *sessionqueue_alt;
+ struct PendingMessage *pm;
-//TODO doxigen
-/**
- * Function to check if there is some space in the fragment queue
- */
+ sessionqueue = plugin->pending_Sessions_head;
-static void
-check_fragment_queue (struct Plugin * plugin){
- struct Session * session;
- struct FragmentMessage * fm;
-
- struct PendingMessage * pm;
-
- if (plugin->pending_fragment_messages < FRAGMENT_QUEUE_SIZE){
- session = get_next_queue_Session(plugin);
- if (session != NULL){
- pm = session->pending_message;
- session->pending_message = NULL;
- session->has_fragment = 1;
- GNUNET_assert(pm != NULL);
-
- fm = GNUNET_malloc(sizeof(struct FragmentMessage));
- fm->message_size = pm->message_size;
- fm->msg = pm->msg;
- fm->session = session;
- fm->timeout.abs_value = pm->timeout.abs_value;
- fm->message_pos = 0;
- fm->next_ack = GNUNET_TIME_absolute_get();
-
- if (pm->transmit_cont != NULL)
- pm->transmit_cont (pm->transmit_cont_cls,
- &(session->target), GNUNET_OK);
- GNUNET_free(pm);
-
- sort_fragment_into_queue(plugin,fm);
- plugin->pending_fragment_messages ++;
-
- //generate new message id
- session->message_id_out = get_next_message_id();
-
- //check if timeout changed
- check_next_fragment_timeout(plugin);
- }
- }
-}
+ while (sessionqueue != NULL)
+ {
+ session = sessionqueue->content;
-//TODO doxigen
-static void
-check_finished_fragment(struct Plugin * plugin, struct FragmentMessage * fm){
- struct AckQueue * ack;
- int counter = 0;
+ GNUNET_assert (session != NULL);
+ pm = session->pending_message_head;
- if (fm->message_size >= (WLAN_MTU - sizeof(struct FragmentationHeader))
- * fm->tail->fragment_num)
- {
- ack = fm->head;
- counter = 0;
- //check if all acks are present
- while (ack != NULL)
+ if (pm == NULL)
{
- if (counter == ack->fragment_num)
- {
- counter ++;
- ack = ack->next;
- } else {
- //ack is missing
- return;
- }
+#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;
+
}
- fm->session->has_fragment = 0;
- free_fragment_message(plugin, fm);
+ //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;
}
/**
- * Function called to when wlan helper is ready to get some data
- *
- * @param cls closure
- * @param tc GNUNET_SCHEDULER_TaskContext
+ * frees the space of a message in the fragment queue (send queue)
+ * @param plugin the plugin struct
+ * @param fm message to free
*/
-
static void
-do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+free_fragment_message (struct Plugin *plugin, struct FragmentMessage *fm)
{
+ struct Session *session = fm->session;
+ struct MacEndpoint *endpoint = session->mac;
+ struct FragmentMessage_queue *fmq;
+ struct FragmentMessage_queue *fmq_next;
- struct Plugin * plugin = cls;
- plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
-
- ssize_t bytes;
-
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- struct Session * session = NULL;
- struct FragmentMessage * fm = NULL;
- struct IeeeHeader * ieeewlanheader = NULL;
- struct RadiotapHeader * radioHeader = NULL;
- struct GNUNET_MessageHeader * msgheader = NULL;
- struct GNUNET_MessageHeader * msgheader2 = NULL;
- struct FragmentationHeader fragheader;
- struct FragmentationHeader * fragheaderptr = NULL;
- uint16_t size = 0;
- const char * copystart = NULL;
- uint16_t copysize = 0;
- uint copyoffset = 0;
- struct AckQueue * akt = NULL;
-
- //test if a "hello-beacon" has to be send
- if (GNUNET_TIME_absolute_get_remaining(plugin->beacon_time).rel_value == 0)
+ if (fm != NULL)
+ {
+ fmq = plugin->sending_messages_head;
+ while (fmq != NULL)
{
- //check if the message is not to big
- GNUNET_assert(sizeof(struct WlanHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello)) <= WLAN_MTU);
- size = sizeof(struct GNUNET_MessageHeader)
- + sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
- + sizeof(struct GNUNET_MessageHeader) + GNUNET_HELLO_size(
- *(plugin->env->our_hello));
-
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct RadiotapHeader *) &msgheader[1];
- getRadiotapHeader(radioHeader);
-
- ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(ieeewlanheader);
-
- msgheader2 = (struct GNUNET_MessageHeader *) &ieeewlanheader[1];
- msgheader2->size = htons(GNUNET_HELLO_size(*(plugin->env->our_hello)) + sizeof(struct GNUNET_MessageHeader));
- msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
-
- memcpy(&msgheader2[1], *plugin->env->our_hello, GNUNET_HELLO_size(
- *(plugin->env->our_hello)));
+ 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;
+ }
+ (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
+ }
+}
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader,
- size);
- GNUNET_assert(bytes == size);
+/**
+ * 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)
+{
- set_next_beacon_time(plugin);
- check_next_fragment_timeout(plugin);
- return;
+ 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;
+ }
- }
+ 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));
- fm = plugin->pending_Fragment_Messages_head;
- GNUNET_assert(fm != NULL);
- session = fm->session;
- GNUNET_assert(session != NULL);
-
- // test if message timed out
- if (GNUNET_TIME_absolute_get_remaining(fm->timeout).rel_value == 0){
- free_acks(fm);
- GNUNET_assert(plugin->pending_fragment_messages > 0);
- plugin->pending_fragment_messages --;
- GNUNET_CONTAINER_DLL_remove(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
-
- GNUNET_free(fm->msg);
-
- GNUNET_free(fm);
- check_fragment_queue(plugin);
- } else {
-
- if (fm->message_size > WLAN_MTU) {
- size += sizeof(struct FragmentationHeader);
- // check/set for retransmission
- if (GNUNET_TIME_absolute_get_duration(fm->next_ack).rel_value == 0) {
-
- // be positive and try again later :-D
- fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(fm));
- // find first missing fragment
- akt = fm->head;
- fm->message_pos = 0;
-
- //test if ack 0 was already received
- while (akt != NULL){
- //if fragment is present, take next
- if (akt->fragment_num == fm->message_pos) {
- fm->message_pos ++;
- }
- //next ack is bigger then the fragment number
- //in case there is something like this: (acks) 1, 2, 5, 6, ...
- //and we send 3 again, the next number should be 4
- else if (akt->fragment_num > fm->message_pos) {
- break;
- }
-
- akt = akt->next;
-
- }
-
-
- }
-
- copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader)) * fm->message_pos;
- fragheader.fragment_off_or_num = htons(fm->message_pos);
- fragheader.message_id = htonl(session->message_id_out);
-
- // start should be smaller then the packet size
- GNUNET_assert(copyoffset < fm->message_size);
- copystart = fm->msg + copyoffset;
-
- //size of the fragment is either the MTU - overhead
- //or the missing part of the message in case this is the last fragment
- copysize = GNUNET_MIN(fm->message_size - copyoffset,
- WLAN_MTU - sizeof(struct FragmentationHeader));
- fragheader.header.size = htons(copysize + sizeof(struct FragmentationHeader));
- fragheader.header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT);
-
-
- //get the next missing fragment
- akt = fm->head;
- fm->message_pos ++;
-
- //test if ack was already received
- while (akt != NULL){
- //if fragment is present, take next
- if (akt->fragment_num == fm->message_pos) {
- fm->message_pos ++;
- }
- //next ack is bigger then the fragment number
- //in case there is something like this: (acks) 1, 2, 5, 6, ...
- //and we send 3 again, the next number should be 4
- else if (akt->fragment_num > fm->message_pos) {
- break;
- }
-
- akt = akt->next;
- }
- } else {
- // there is no need to split
- copystart = fm->msg;
- copysize = fm->message_size;
- }
-
- size += copysize;
- size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader)
- + sizeof(struct GNUNET_MessageHeader);
- msgheader = GNUNET_malloc(size);
- msgheader->size = htons(size);
- msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
-
- radioHeader = (struct RadiotapHeader*) &msgheader[1];
- getRadiotapHeader(radioHeader);
-
- ieeewlanheader = (struct IeeeHeader *) &radioHeader[1];
- getWlanHeader(ieeewlanheader);
-
-
- //could be faster if content is just send and not copyed before
- //fragmentheader is needed
- if (fm->message_size > WLAN_MTU){
- fragheader.message_crc = htons(getcrc16(copystart, copysize));
- memcpy(&ieeewlanheader[1],&fragheader, sizeof(struct FragmentationHeader));
- fragheaderptr = (struct FragmentationHeader *) &ieeewlanheader[1];
- memcpy(&fragheaderptr[1],copystart,copysize);
- } else {
- memcpy(&ieeewlanheader[1],copystart,copysize);
- }
-
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size);
- GNUNET_assert(bytes == size);
-
- //check if this was the last fragment of this message, if true then queue at the end of the list
- if (copysize + copyoffset >= fm->message_size){
- GNUNET_assert(copysize + copyoffset == fm->message_size);
-
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
-
- GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Fragment_Messages_head,
- plugin->pending_Fragment_Messages_tail, fm);
- // if fragments have opimized timeouts
- //sort_fragment_into_queue(plugin,fm);
-
- }
- check_next_fragment_timeout(plugin);
+#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 that can be used by the transport service to transmit
- * a message using the plugin.
- *
- * @param cls closure
- * @param target who should receive this message
- * @param priority how important is the message
- * @param msgbuf the message to transmit
- * @param msgbuf_size number of bytes in 'msgbuf'
- * @param timeout when should we time out
- * @param session which session must be used (or NULL for "any")
- * @param addr the address to use (can be NULL if the plugin
- * is "on its own" (i.e. re-use existing TCP connection))
- * @param addrlen length of the address in bytes
- * @param force_address GNUNET_YES if the plugin MUST use the given address,
- * otherwise the plugin may use other addresses or
- * existing connections (if available)
- * @param cont continuation to call once the message has
- * been transmitted (or if the transport is ready
- * for the next transmission call; or if the
- * peer disconnected...)
- * @param cont_cls closure for cont
- * @return number of bytes used (on the physical network, with overheads);
- * -1 on hard errors (i.e. address invalid); 0 is a legal value
- * and does NOT mean that the message was not transmitted (DV)
+ * 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
*/
-static ssize_t
-wlan_plugin_send (void *cls,
- const struct GNUNET_PeerIdentity * target,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative timeout,
- struct Session *session,
- const void *addr,
- size_t addrlen,
- int force_address,
- GNUNET_TRANSPORT_TransmitContinuation cont,
- void *cont_cls)
-{
- struct Plugin * plugin = cls;
- struct PendingMessage * newmsg = NULL;
- struct WlanHeader * wlanheader = NULL;
- //check if msglen > 0
- GNUNET_assert(msgbuf_size > 0);
-
- //get session if needed
- if (session == NULL)
- {
- if (wlan_plugin_address_suggested(plugin, addr, addrlen) == GNUNET_OK)
- {
- session = get_Session(plugin, addr);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Wlan Address len %d is wrong\n"), addrlen);
- return -1;
- }
- }
- //TODO target "problem" not solved
- session->target = *target;
+void
+add_message_for_send (void *cls, const struct GNUNET_MessageHeader *hdr)
+{
- //queue message:
- //first queue session
- queue_Session(plugin, session);
+ 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
- //queue message in session
- //test if there is no other message in the "queue"
- GNUNET_assert (session->pending_message == NULL);
+ size =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) +
+ sizeof (struct ieee80211_frame) + ntohs (hdr->size);
+ fm->frag = GNUNET_malloc (size);
+ fm->size = size;
- newmsg = GNUNET_malloc(sizeof(struct PendingMessage));
- (newmsg->msg) = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader));
- wlanheader = (struct WlanHeader *) newmsg->msg;
- //copy msg to buffer, not fragmented / segmented yet, but with message header
- wlanheader->header.size = htons(msgbuf_size + sizeof(struct WlanHeader));
- wlanheader->header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_DATA);
- memcpy(&(wlanheader->target), target, sizeof(struct GNUNET_PeerIdentity));
- wlanheader->crc = htonl(getcrc32(msgbuf, msgbuf_size));
- memcpy(&wlanheader[1], msgbuf, msgbuf_size);
- newmsg->transmit_cont = cont;
- newmsg->transmit_cont_cls = cont_cls;
- newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout);
- newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
+ msgheader = (struct GNUNET_MessageHeader *) fm->frag;
+ msgheader->size = htons (size);
+ msgheader->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
- session->pending_message = newmsg;
+ 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));
- check_fragment_queue(plugin);
- //FIXME not the correct size
- return msgbuf_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);
}
-//TODO doxigen
-static struct FragmentMessage *
-get_fragment_message_from_session(struct Session * session)
+
+/**
+ * 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 FragmentMessage * fm = session->plugin->pending_Fragment_Messages_head;
- while (fm != NULL)
+ 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)
{
- if (fm->session == session)
- {
- return fm;
- }
- fm = fm->next;
+ plugin->server_proc =
+ GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout,
+ filenamehw, filenamehw, plugin->interface,
+ NULL);
}
- return 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;
}
/**
- * Function that can be used to force the plugin to disconnect
- * from the given peer and cancel all previous transmissions
- * (and their continuation).
+ * Stops the gnunet-wlan-helper process.
*
- * @param cls closure
- * @param target peer from which to disconnect
+ * @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
-wlan_plugin_disconnect(void *cls, const struct GNUNET_PeerIdentity *target)
+delay_restart_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct Plugin *plugin = cls;
- struct Sessionqueue * queue = plugin->sessions;
- struct Sessionqueue * pendingsession = plugin->pending_Sessions;
- struct PendingMessage * pm = NULL;
- struct FragmentMessage * fm;
+ struct Finish_send *finish = cls;
+ struct Plugin *plugin;
+ plugin = finish->plugin;
- // just look at all the session for the needed one
- while (queue != NULL)
+ 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)
{
- // content is never NULL
- GNUNET_assert (queue->content != NULL);
- if (memcmp(target, &(queue->content->target),
- sizeof(struct GNUNET_PeerIdentity)) == 0)
- {
- //session found
- //is this session pending for send
- while (pendingsession != NULL)
- {
- if (pendingsession->content == queue->content)
- {
- plugin->pendingsessions --;
- GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions,
- plugin->pending_Sessions_tail, pendingsession);
- GNUNET_free(pendingsession);
- break;
- }
- pendingsession = pendingsession->next;
- }
+ 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);
- //is something of this session in the fragment queue?
- fm = get_fragment_message_from_session(queue->content);
- free_fragment_message(plugin,fm);
+ 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);
- //dispose all received fragments
- free_rec_frag_queue(queue->content);
+}
- // remove PendingMessage
- pm = queue->content->pending_message;
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
+/**
+ * function to 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;
- GNUNET_free(queue->content);
- GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue);
- GNUNET_free(queue);
- plugin->session_count --;
+ plugin = finish->plugin;
+ plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK;
- return;
- }
- // try next
- queue = queue->next;
- }
+ 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);
+
+
+}
/**
- * Convert the transports address to a nice, human-readable
- * format.
+ * 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
*
- * @param cls closure
- * @param type name of the transport that generated the address
- * @param addr one of the addresses of the host, NULL for the last address
- * the specific address format depends on the transport
- * @param addrlen length of the address
- * @param numeric should (IP) addresses be displayed in numeric form?
- * @param timeout after how long should we give up?
- * @param asc function to call on each string
- * @param asc_cls closure for asc
*/
+
+static void
+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
-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)
+check_fragment_queue (struct Plugin *plugin)
{
- char ret[92];
- const unsigned char * input;
-
- GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ 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)
{
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- asc (asc_cls, NULL);
- return;
+ 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);
+ }
+
}
- 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);
+ }
+
+ //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
* @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)
+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! */
+ * add it to our list! */
- GNUNET_assert(cls !=NULL);
+ 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 */
+ //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;
- } else {
- return GNUNET_SYSERR;
}
-
+#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;
}
-
/**
- * 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 that can be used by the transport service to transmit
+ * a message using the plugin.
*
* @param cls closure
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
+ * @param target who should receive this message
+ * @param priority how important is the message
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in 'msgbuf'
+ * @param timeout when should we time out
+ * @param session which session must be used (or NULL for "any")
+ * @param addr the address to use (can be NULL if the plugin
+ * is "on its own" (i.e. re-use existing TCP connection))
+ * @param addrlen length of the address in bytes
+ * @param force_address GNUNET_YES if the plugin MUST use the given address,
+ * otherwise the plugin may use other addresses or
+ * existing connections (if available)
+ * @param cont continuation to call once the message has
+ * been transmitted (or if the transport is ready
+ * for the next transmission call; or if the
+ * peer disconnected...)
+ * @param cont_cls closure for cont
+ * @return number of bytes used (on the physical network, with overheads);
+ * -1 on hard errors (i.e. address invalid); 0 is a legal value
+ * and does NOT mean that the message was not transmitted (DV)
*/
-static const char*
-wlan_plugin_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
+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)
{
- char ret[92];
- const unsigned char * input;
-
- GNUNET_assert(cls !=NULL);
- if (addrlen != 6)
+ struct Plugin *plugin = cls;
+ struct PendingMessage *newmsg;
+ struct WlanHeader *wlanheader;
+ GNUNET_assert (plugin != NULL);
+ //check if msglen > 0
+ GNUNET_assert (msgbuf_size > 0);
+
+ //get session if needed
+ if (session == NULL)
+ {
+ if (wlan_plugin_address_suggested (plugin, addr, addrlen) == GNUNET_OK)
{
- /* invalid address (MAC addresses have 6 bytes) */
- GNUNET_break (0);
- return NULL;
+ session = get_session (plugin, addr, target);
}
- 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);
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME,
+ _("Wlan Address len %d is wrong\n"), addrlen);
+ return -1;
+ }
+ }
+
+ GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan messages queued"), 1, GNUNET_NO);
+
+ //queue message:
+
+ //queue message in session
+ //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 = 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->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);
+
+#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;
+
}
/**
- * Function to test if fragment number already exists in the fragments received
+ * function to free a mac endpoint
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the MacEndpoint to free
*/
-//TODO doxigen
-static const int
-is_double_msg(struct Session * session, struct FragmentationHeader * fh)
+static void
+free_macendpoint (struct Plugin *plugin, struct MacEndpoint *endpoint)
{
- struct RecQueue * rec_queue = session->frag_head;
- while (rec_queue != NULL)
- {
- if (rec_queue->num == fh->fragment_off_or_num)
- {
- return GNUNET_YES;
- }
- rec_queue = rec_queue->next;
+ struct Sessionqueue *sessions;
+ struct Sessionqueue *sessions_next;
- }
- return GNUNET_NO;
-}
+ GNUNET_assert (endpoint != NULL);
+ sessions = endpoint->sessions_head;
+ while (sessions != NULL)
+ {
+ sessions_next = sessions->next;
+ free_session (plugin, sessions, GNUNET_NO);
+ sessions = sessions_next;
+ }
+
+ 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);
+}
+
+/**
+ * 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
-insert_fragment_in_queue(struct Session * session, struct RecQueue * rec_queue)
+free_session (struct Plugin *plugin, struct Sessionqueue *queue,
+ int do_free_macendpoint)
{
- struct RecQueue * rec_queue2 = session->frag_head;
- struct WlanHeader * wlanheader = NULL;
- //first received fragment of message
- if (session->rec_size == NO_MESSAGE_OR_MESSAGE_FINISHED)
+ 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)
{
- session->rec_size = MESSAGE_LENGHT_UNKNOWN;
- }
- //this is the first fragment of the message (fragment id 0)
- if (rec_queue->num == 0)
- {
- wlanheader = (struct WlanHeader *) rec_queue->msg;
- session->rec_size = wlanheader->header.size;
+ 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;
}
+ }
- //sort into list
- while (rec_queue2 != NULL)
+ endpoint = queue->content->mac;
+ fm = endpoint->sending_messages_head;
+ while (fm != NULL)
+ {
+ fmnext = fm->next;
+ if (fm->session == queue->content)
{
- if (rec_queue2->num > rec_queue->num)
- {
- //next element number is grater than the current num
- GNUNET_CONTAINER_DLL_insert_before(session->frag_head, session->frag_tail, rec_queue2, rec_queue);
- return;
- }
- rec_queue = rec_queue->next;
+ free_fragment_message (plugin, fm);
}
- //no element has a grater number
- GNUNET_CONTAINER_DLL_insert_tail(session->frag_head, session->frag_tail, rec_queue);
+ fm = fmnext;
+ }
+
+ // 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);
+ }
+
+ if (queue->content->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (queue->content->timeout_task);
+ GNUNET_free (queue);
+
+ check_fragment_queue (plugin);
}
/**
- * Function to dispose the fragments received for a message
+ * Function that can be used to force the plugin to disconnect
+ * from the given peer and cancel all previous transmissions
+ * (and their continuation).
+ *
+ * @param cls closure
+ * @param target peer from which to disconnect
*/
-//TODO doxigen
static void
-free_rec_frag_queue(struct Session * session)
+wlan_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
{
- struct RecQueue * rec_queue = session->frag_head;
- struct RecQueue * rec_queue2;
- while (rec_queue != NULL)
+ 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)
{
- rec_queue2 = rec_queue;
- rec_queue = rec_queue->next;
- GNUNET_free(rec_queue2);
+ // 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;
}
- session->frag_head = NULL;
- session->frag_tail = NULL;
- session->rec_size = NO_MESSAGE_OR_MESSAGE_FINISHED;
+ endpoint = endpoint_next;
+ }
}
/**
- * Function to check if all fragments of a message have been received
+ * Convert the transports address to a nice, human-readable
+ * format.
+ *
+ * @param cls closure
+ * @param type name of the transport that generated the address
+ * @param addr one of the addresses of the host, NULL for the last address
+ * the specific address format depends on the transport
+ * @param addrlen length of the address
+ * @param numeric should (IP) addresses be displayed in numeric form?
+ * @param timeout after how long should we give up?
+ * @param asc function to call on each string
+ * @param asc_cls closure for asc
*/
-//TODO doxigen
static void
-check_rec_finished_msg (struct Plugin* plugin, struct Session_light * session_light, struct Session * session){
- struct RecQueue * rec_queue = session->frag_head;
- int packetsize = session->rec_size;
- int sum = 0;
- int aktnum = 0;
- char * msg;
- //some fragment should be received
- GNUNET_assert(session->rec_size != NO_MESSAGE_OR_MESSAGE_FINISHED);
- //check if first fragment is present
- if (session->rec_size == MESSAGE_LENGHT_UNKNOWN){
- return;
- }
- while (rec_queue != NULL){
- sum += rec_queue->size;
- //check if all fragment numbers are present
- if (rec_queue->num != aktnum){
- return;
- }
- aktnum ++;
- rec_queue = rec_queue->next;
- }
- //sum should always be smaller or equal of
- GNUNET_assert(sum <= packetsize);
- if (sum == packetsize){
- //copy fragments together
- msg = GNUNET_malloc(packetsize);
- rec_queue = session->frag_head;
- aktnum = 0;
- while (rec_queue != NULL){
- memcpy(msg + aktnum, rec_queue->msg, rec_queue->size);
- aktnum += rec_queue->size;
- rec_queue = rec_queue->next;
- }
- free_rec_frag_queue(session);
- //call wlan_process_helper to process the message
- wlan_data_helper (plugin, session_light, (struct GNUNET_MessageHeader*) msg);
-
- GNUNET_free(msg);
+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_helper(void *cls, void * client, const struct GNUNET_MessageHeader * hdr)
+wlan_data_message_handler (void *cls, const struct GNUNET_MessageHeader *hdr)
{
- struct Plugin *plugin = cls;
- struct Session * session = NULL;
- struct Session_light * session_light = NULL;
+ struct MacEndpoint *endpoint = (struct MacEndpoint *) cls;
+ struct Plugin *plugin = endpoint->plugin;
+ struct WlanHeader *wlanheader;
+ struct Session *session;
- struct WlanHeader * wlanheader = NULL;
- struct FragmentationHeader * fh = NULL;
- struct FragmentMessage * fm = NULL;
+ const struct GNUNET_MessageHeader *temp_hdr;
+ struct GNUNET_PeerIdentity tmpsource;
+ int crc;
- const char * tempmsg = NULL;
+ GNUNET_assert (plugin != NULL);
- struct AckQueue * ack = NULL;
- struct AckQueue * ack2 = NULL;
+ if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ {
- struct RecQueue * rec_queue = NULL;
- const struct GNUNET_MessageHeader * temp_hdr = NULL;
+#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->type) == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT)
- {
- //TODO better DOS protection, error handling
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
- if (session_light->session == NULL){
- session_light->session = get_Session(plugin, session_light->addr);
- }
- GNUNET_assert(GNUNET_HELLO_get_id(
- (const struct GNUNET_HELLO_Message *) &hdr[1],
- &(session_light->session->target) ) != GNUNET_SYSERR);
+ if (ntohs (hdr->size) <
+ sizeof (struct WlanHeader) + sizeof (struct GNUNET_MessageHeader))
+ {
+ //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);
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ 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))
{
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
- if (session_light->session == NULL){
- session_light->session = search_session(plugin, session_light->addr);
+ 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;
+ }
+
}
- session = session_light->session;
- wlanheader =(struct WlanHeader *) &hdr[1];
- tempmsg = (char*) &wlanheader[1];
- temp_hdr = ( const struct GNUNET_MessageHeader *) &wlanheader[1];
-
- if (getcrc32(tempmsg, wlanheader->header.size) != wlanheader->crc){
- //wrong crc, dispose message
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "WLAN message crc was wrong\n");
+ 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;
+ }
+ }
- //if not in session list
- if (session == NULL){
+ //"receive" the message
- //try if it is a hello message
- if (ntohs(temp_hdr->type) == GNUNET_MESSAGE_TYPE_HELLO){
- session = create_session(plugin, session_light->addr);
- session_light->session = session;
- GNUNET_assert(GNUNET_HELLO_get_id(
- (const struct GNUNET_HELLO_Message *) temp_hdr,
- &session->target ) != GNUNET_SYSERR);
+ 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;
+ }
- } else {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and not a hello message\n");
- return;
- }
- }
- //"receive" the message
- struct GNUNET_TRANSPORT_ATS_Information distance[2];
- distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
- distance[0].value = htonl (1);
- distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
- distance[1].value = htonl (0);
- plugin->env->receive(plugin, &session->target,
- temp_hdr, (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2,
- session, session->addr, sizeof(session->addr));
- }
+ 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;
+ }
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT)
- {
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
- if (session_light->session == NULL)
- {
- session_light->session = search_session(plugin, session_light->addr);
- }
- session = session_light->session;
+ GNUNET_SERVER_mst_receive (plugin->data_tokenizer, session,
+ (const char *) temp_hdr,
+ ntohs (hdr->size) - sizeof (struct WlanHeader),
+ GNUNET_YES, GNUNET_NO);
- fh = (struct FragmentationHeader *) hdr;
- tempmsg = (char*) &fh[1];
+ 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;
+ }
+}
- //if not in session list
- if (session != NULL)
- {
- if (getcrc16(tempmsg, fh->header.size) != fh->message_crc)
- {
- //wrong crc, dispose message
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment crc was wrong\n");
- return;
- }
- else
- {
- //todo fragments do not timeout
- //check if message_id is rigth or it is a new msg
- if ((session->message_id_in == ntohs(fh->message_id))
- || (session->rec_size == NO_MESSAGE_OR_MESSAGE_FINISHED))
- {
- session->message_id_in = ntohs(fh->message_id);
- if (is_double_msg(session, fh) != GNUNET_YES)
- {
- rec_queue = GNUNET_malloc(sizeof (struct RecQueue) +
- ntohs(fh->header.size) - sizeof(struct FragmentationHeader));
- rec_queue->size = ntohs(fh->header.size
- - sizeof(struct FragmentationHeader));
- rec_queue->num = ntohs(fh->fragment_off_or_num);
- rec_queue->msg = (char*) &rec_queue[1];
- //copy msg to buffer
- memcpy((char*) rec_queue->msg, tempmsg, rec_queue->size);
- insert_fragment_in_queue(session, rec_queue);
- check_rec_finished_msg(plugin, session_light, session);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment is a clone\n");
- return;
- }
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "WLAN fragment message_id and session message_id are not the same and a message is already (partly) received\n");
- return;
- }
- }
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN client not in session list and it is a fragment message\n");
- return;
- }
+/**
+ * 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;
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT_ACK)
- {
- GNUNET_assert(client != NULL);
- session_light = (struct Session_light *) client;
- if (session_light->session == NULL)
- {
- session_light->session = search_session(plugin, session_light->addr);
- GNUNET_assert(session_light->session != NULL);
- }
- session = session_light->session;
- fh = (struct FragmentationHeader *) &hdr[1];
- if (fh->message_id == session->message_id_out)
- {
- fm = get_fragment_message_from_session(session);
- if (fm != NULL)
- {
-
- ack2 = fm->head;
- while (ack2!=NULL){
- // check for double
- if (ack2->fragment_num != fh->fragment_off_or_num)
- {
- // check if next ack has bigger number
- if (ack2->fragment_num > fh->fragment_off_or_num)
- {
- ack = GNUNET_malloc(sizeof(struct AckQueue));
- ack->fragment_num = fh->fragment_off_or_num;
- GNUNET_CONTAINER_DLL_insert_before(fm->head,fm->tail,ack2,ack);
- //check if finished
- check_finished_fragment(plugin, fm);
- return;
- }
- }
- else
- {
- //double ack
- return;
- }
- ack2 = ack2->next;
- }
- //GNUNET_CONTAINER_DLL_insert_tail(fm->head,fm->tail,ack);
- //should never happen but...
- //check_finished_fragment(plugin, fm);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "WLAN fragment not in fragment list but id is right\n");
- return;
- }
+ struct GNUNET_ATS_Information distance;
- }
+ distance.type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
+ distance.value = htonl (1);
- }
- else
- {
- // TODO Wrong data?
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN packet has not the right type\n");
- return;
- }
+#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
+ 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 used for to process the data from the suid process
+ * Function used for to process the data received from the wlan interface
+ *
+ * @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
*/
-//TODO doxigen
-
static void
-wlan_process_helper (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr)
+wlan_data_helper (void *cls, struct Session_light *session_light,
+ const struct GNUNET_MessageHeader *hdr,
+ const struct Radiotap_rx *rxinfo)
{
struct Plugin *plugin = cls;
- struct IeeeHeader * wlanIeeeHeader = NULL;
- struct Session_light * session_light = NULL;
- const struct GNUNET_MessageHeader * temp_hdr = NULL;
+ struct FragmentMessage *fm;
+ struct FragmentMessage *fm2;
+ struct GNUNET_PeerIdentity tmpsource;
+
+ GNUNET_assert(plugin != NULL);
+
+ //ADVERTISEMENT
+ if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_HELLO)
+ {
- int pos = 0;
+ //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 (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA)
+ if (session_light->macendpoint == NULL)
{
- //call wlan_process_helper with the message inside, later with wlan: analyze signal
- GNUNET_assert(ntohs(hdr->size) >= sizeof(struct IeeeHeader));
- wlanIeeeHeader = (struct IeeeHeader *) &hdr[1];
+ session_light->macendpoint =
+ get_macendpoint (plugin, &session_light->addr, GNUNET_YES);
+ }
- session_light = GNUNET_malloc(sizeof(struct Session_light));
- memcpy(session_light->addr, &(wlanIeeeHeader->mac3), sizeof(struct MacAddress));
- session_light->session = search_session(plugin, session_light->addr);
- //process only if it is an broadcast or for this computer both with the gnunet bssid
- //check for bssid
- if (memcmp(&(wlanIeeeHeader->mac2), macbc, sizeof(struct MacAddress)))
+ 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)
{
- //check for broadcast or mac
- if (memcmp(&(wlanIeeeHeader->mac1), bc_all_mac, sizeof(struct MacAddress))
- || memcmp(&(wlanIeeeHeader->mac1), &(plugin->mac_address),
- sizeof(struct MacAddress)))
- {
- // process the inner data
- pos = 0;
- temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1];
- while (pos < hdr->size)
- {
- wlan_data_helper(plugin, &session_light, temp_hdr);
- pos += temp_hdr->size + sizeof(struct GNUNET_MessageHeader);
- }
- }
+ 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;
+ }
+ }
- //clean up
- GNUNET_free(session_light);
+ //FRAGMENT
+ 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);
- else if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL)
+ if (ret == GNUNET_NO)
{
- //TODO more control
- //TODO use struct wlan_helper_control
- if (ntohs(hdr->size) == sizeof(struct Wlan_Helper_Control_Message))
- {
- //plugin->mac_address = GNUNET_malloc(sizeof(struct MacAddress));
- memcpy(&(plugin->mac_address), &hdr[1], sizeof(struct MacAddress));
- GNUNET_log(
- GNUNET_ERROR_TYPE_DEBUG,
- "Notifying transport of address %s\n",
- wlan_plugin_address_to_string(cls, &(plugin->mac_address), hdr->size));
- plugin->env->notify_address(plugin->env->cls, "wlan",
- &plugin->mac_address, sizeof(struct MacAddress),
- GNUNET_TIME_UNIT_FOREVER_REL);
- }
- else
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Wrong wlan mac address %s\n",
- plugin->mac_address);
- }
-
+ session_light->macendpoint->dups++;
+ }
+ else if (ret == GNUNET_OK)
+ {
+ session_light->macendpoint->fragc++;
}
+ set_next_send (plugin);
+ }
- else
+ //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)
{
- // TODO Wrong data?
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "WLAN helper packet has not the right type\n");
+#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
+ {
+ // 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;
- plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK;
-
- char mybuf[WLAN_MTU + sizeof(struct GNUNET_MessageHeader)];
- 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;
+ }
+ 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);
+ }
+}
- bytes = GNUNET_DISK_file_read (plugin->server_stdout_handle,
- mybuf, sizeof(mybuf));
- if (bytes <= 0)
- {
+/**
+ * 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 (GNUNET_ERROR_TYPE_DEBUG,
- _("Finished reading from wlan-helper stdout with code: %d\n"), bytes);
+ 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;
- }
- GNUNET_SERVER_mst_receive(plugin->consoltoken, 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);
+ return newend;
}
-
/**
- * Start the gnunet-wlan-helper process.
+ * Function used for to process the data from the suid process
*
- * @param plugin the transport plugin
- * @param testmode should we use the dummy driver for testing?
- * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
+ * @param cls 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, int testmode)
+static void
+wlan_process_helper (void *cls, void *client,
+ const struct GNUNET_MessageHeader *hdr)
{
- const char * filename = "gnunet-transport-wlan-helper";
- plugin->server_stdout = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_NO, GNUNET_YES);
- if (plugin->server_stdout == NULL)
- return GNUNET_SYSERR;
-
- plugin->server_stdin = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_YES, GNUNET_NO);
- if (plugin->server_stdin == NULL)
- return GNUNET_SYSERR;
-
+ 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 (GNUNET_ERROR_TYPE_DEBUG,
- "Starting gnunet-wlan-helper process cmd: %s %s %i\n", filename, plugin->interface, testmode);
+ 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
- /* Start the server process */
- plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin,
- plugin->server_stdout, filename,filename, plugin->interface, ((testmode==1)?"1":"0"), NULL);
- if (plugin->server_proc == NULL)
+ 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 (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to start gnunet-wlan-helper process\n");
+ 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
- return GNUNET_SYSERR;
+ //GNUNET_break (0);
+ /* FIXME: restart SUID process */
+ return;
}
- /* 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);
+ rxinfo = (struct Radiotap_rx *) &hdr[1];
+ wlanIeeeHeader = (struct ieee80211_frame *) &rxinfo[1];
- 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);
+ //process only if it is an broadcast or for this computer both with the gnunet bssid
- GNUNET_assert(plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK);
- plugin->server_read_task = GNUNET_SCHEDULER_add_read_file(
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdout_handle,
- &wlan_plugin_helper_read, plugin);
- return GNUNET_YES;
-}
+ //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
+ }
+ 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_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
+ }
+ 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));
+#endif
+#if DEBUG_wlan_msg_dump > 1
+ hexdump (hdr, GNUNET_MIN (ntohs (hdr->size), 256));
+#endif
+ GNUNET_break (0);
+ return;
+ }
+}
/**
* Exit point from the plugin.
+ * @param cls pointer to the api struct
*/
-//TODO doxigen
+
//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;
+
+ }
+
- GNUNET_assert(cls !=NULL);
+ if (plugin->suid_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->suid_tokenizer);
- if (plugin->consoltoken != NULL)
- GNUNET_SERVER_mst_destroy(plugin->consoltoken);
+ if (plugin->data_tokenizer != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->data_tokenizer);
- GNUNET_free_non_null(plugin->interface);
+ GNUNET_free_non_null (plugin->interface);
GNUNET_free (plugin);
GNUNET_free (api);
return NULL;
struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
struct GNUNET_TRANSPORT_PluginFunctions *api;
struct Plugin *plugin;
- int testmode;
- GNUNET_assert(cls !=NULL);
+ GNUNET_assert (cls != NULL);
plugin = GNUNET_malloc (sizeof (struct Plugin));
plugin->env = env;
plugin->pendingsessions = 0;
- plugin->session_count = 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);
- testmode = GNUNET_NO;
- if (GNUNET_CONFIGURATION_have_value (env->cfg,
- "transport-wlan", "TESTMODE"))
- {
- testmode = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "transport-wlan","TESTMODE");
- }
-
- if (GNUNET_CONFIGURATION_have_value (env->cfg,
- "transport-wlan", "INTERFACE"))
- {
- if (GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "transport-wlan","INTERFACE", &(plugin->interface)) != GNUNET_YES){
- libgnunet_plugin_transport_wlan_done(plugin);
- return NULL;
- }
- }
-
- wlan_transport_start_wlan_helper(plugin, testmode);
- plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin);
+ plugin->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;
+ //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
+ }
+
+ if (GNUNET_CONFIGURATION_have_value (env->cfg, "transport-wlan", "INTERFACE"))
+ {
+ if (GNUNET_CONFIGURATION_get_value_string
+ (env->cfg, "transport-wlan", "INTERFACE",
+ &(plugin->interface)) != GNUNET_YES)
+ {
+ libgnunet_plugin_transport_wlan_done (api);
+ return NULL;
+ }
+ }
- start_next_message_id();
+ //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
return api;
}
projects / oweals / gnunet.git / blobdiff