X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Ftransport%2Fplugin_transport_wlan.c;h=a740f758b2b40245e7280b8ccfbf0156c7331a57;hb=f8148eb4ca75dd9b72f11b8b42b157c9534bc9ad;hp=3459f456c2d131b7880e664ceb31bc8b3aa6e835;hpb=311e9e5636fdd21172f9bca63cc8746c654ae526;p=oweals%2Fgnunet.git diff --git a/src/transport/plugin_transport_wlan.c b/src/transport/plugin_transport_wlan.c index 3459f456c..a740f758b 100644 --- a/src/transport/plugin_transport_wlan.c +++ b/src/transport/plugin_transport_wlan.c @@ -1,22 +1,22 @@ /* - 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 @@ -24,6 +24,8 @@ * @author David Brodski */ +//TODO split rx and tx structures for better handling + #include "platform.h" #include "gnunet_hello_lib.h" #include "gnunet_protocols.h" @@ -34,51 +36,144 @@ #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 + +#include #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. @@ -91,27 +186,29 @@ struct 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 @@ -158,6 +255,11 @@ struct Plugin */ 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. */ @@ -165,15 +267,15 @@ struct Plugin /** * 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 @@ -181,66 +283,114 @@ struct Plugin 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; }; /** @@ -249,11 +399,24 @@ struct RecQueue */ 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 @@ -265,18 +428,50 @@ struct PendingMessage /** * 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; }; /** @@ -288,11 +483,16 @@ struct Session_light /** * 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; }; /** @@ -307,15 +507,16 @@ struct Session 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 @@ -324,886 +525,820 @@ struct Session 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 * @@ -1214,10 +1349,10 @@ do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) */ 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);; } /** @@ -1230,232 +1365,779 @@ getcrc32 (const char *msgbuf, */ 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 @@ -1469,591 +2151,1020 @@ wlan_plugin_address_pretty_printer (void *cls, * @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; @@ -2072,41 +3183,29 @@ libgnunet_plugin_transport_wlan_init (void *cls) 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; @@ -2116,8 +3215,35 @@ libgnunet_plugin_transport_wlan_init (void *cls) 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; }