X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Ftransport%2Fplugin_transport_wlan.c;h=cbab8cb0fe42acecb7a2691d22732f0c6f26cc71;hb=83b19539f4d322b43683f5838b72e9ec2c8e6073;hp=d0d12d09d3c1ea12dc0d598f3c9d82b7664c88fa;hpb=24be41ca6f5987a964ed215f5419aaeeef7a0f62;p=oweals%2Fgnunet.git diff --git a/src/transport/plugin_transport_wlan.c b/src/transport/plugin_transport_wlan.c index d0d12d09d..cbab8cb0f 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) 2010 2011 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 @@ -24,56 +24,157 @@ * @author David Brodski */ +//TODO split rx and tx structures for better handling + #include "platform.h" #include "gnunet_hello_lib.h" #include "gnunet_protocols.h" #include "gnunet_util_lib.h" #include "gnunet_statistics_service.h" #include "gnunet_transport_service.h" -#include "plugin_transport.h" +#include "gnunet_transport_plugin.h" #include "plugin_transport_wlan.h" #include "gnunet_common.h" +#include "gnunet_crypto_lib.h" +#include "gnunet_fragmentation_lib.h" +#include "gnunet_constants.h" +//#include "wlan/ieee80211.h" +//#include + +#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 SESSION_TIMEOUT GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT -#define FRAGMENT_TIMEOUT 1000 +/** + * time out of a mac endpoint + */ +#define MACENDPOINT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT, 2) +/** + * scaling factor for hello beacon + */ +#define HELLO_BEACON_SCALING_FACTOR 30 -#define DEBUG_wlan GNUNET_NO +/** + * scaling factor for restarting the helper + */ +#define HELPER_RESTART_SCALING_FACTOR 2 /** - * After how long do we expire an address that we - * learned from another peer if it is not reconfirmed - * by anyone? + * max size of fragment queue + */ +#define FRAGMENT_QUEUE_SIZE 10 +/** + * max messages in fragment queue per session/client */ -#define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6) +#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1 /** - * Initial handshake message for a session. + * max messages in fragment queue per MAC */ -struct WelcomeMessage -{ - /** - * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME. - */ - struct GNUNET_MessageHeader header; +#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT 1 + +/** + * max messages in in queue + */ +#define MESSAGES_IN_QUEUE_SIZE 10 +/** + * max messages in in queue per session/client + */ +#define MESSAGES_IN_DEFRAG_QUEUE_PER_MAC 1 + +/** + * LLC fields for better compatibility + */ +#define WLAN_LLC_DSAP_FIELD 0x1f +#define WLAN_LLC_SSAP_FIELD 0x1f + + +/** + * DEBUG switch + */ +#define DEBUG_wlan GNUNET_EXTRA_LOGGING +#define DEBUG_wlan_retransmission GNUNET_EXTRA_LOGGING +#define DEBUG_wlan_ip_udp_packets_on_air GNUNET_NO +#define DEBUG_wlan_msg_dump GNUNET_EXTRA_LOGGING - /** - * Identity of the node connecting (TCP client) - */ - struct GNUNET_PeerIdentity clientIdentity; +#define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */ + +#define IEEE80211_FC0_VERSION_MASK 0x03 +#define IEEE80211_FC0_VERSION_SHIFT 0 +#define IEEE80211_FC0_VERSION_0 0x00 +#define IEEE80211_FC0_TYPE_MASK 0x0c +#define IEEE80211_FC0_TYPE_SHIFT 2 +#define IEEE80211_FC0_TYPE_MGT 0x00 +#define IEEE80211_FC0_TYPE_CTL 0x04 +#define IEEE80211_FC0_TYPE_DATA 0x08 + +/* + * Structure of an internet header, naked of options. + */ +struct iph +{ +#if __BYTE_ORDER == __LITTLE_ENDIAN + unsigned int ip_hl:4; /* header length */ + unsigned int ip_v:4; /* version */ +#endif +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned int ip_v:4; /* version */ + unsigned int ip_hl:4; /* header length */ +#endif + u_int8_t ip_tos; /* type of service */ + u_short ip_len; /* total length */ + u_short ip_id; /* identification */ + u_short ip_off; /* fragment offset field */ +#define IP_RF 0x8000 /* reserved fragment flag */ +#define IP_DF 0x4000 /* dont fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ + u_int8_t ip_ttl; /* time to live */ + u_int8_t ip_p; /* protocol */ + u_short ip_sum; /* checksum */ + struct in_addr ip_src, ip_dst; /* source and dest address */ +}; + +struct udphdr +{ + u_int16_t source; + u_int16_t dest; + u_int16_t len; + u_int16_t check; }; +/* + * generic definitions for IEEE 802.11 frames + */ +struct ieee80211_frame +{ + u_int8_t i_fc[2]; + u_int8_t i_dur[2]; + u_int8_t i_addr1[IEEE80211_ADDR_LEN]; + u_int8_t i_addr2[IEEE80211_ADDR_LEN]; + u_int8_t i_addr3[IEEE80211_ADDR_LEN]; + u_int8_t i_seq[2]; + u_int8_t llc[4]; +#if DEBUG_wlan_ip_udp_packets_on_air > 1 + struct iph ip; + struct udphdr udp; +#endif +} GNUNET_PACKED; + /** * Encapsulation of all of the state of the plugin. */ @@ -85,16 +186,29 @@ struct Plugin struct GNUNET_TRANSPORT_PluginEnvironment *env; /** - * List of open sessions. + * List of open connections. head + */ + struct MacEndpoint *mac_head; + + /** + * List of open connections. tail */ - struct Session *sessions; + struct MacEndpoint *mac_tail; /** - * encapsulation to the local wlan server prog + * Number of connections */ + unsigned int mac_count; - struct GNUNET_SERVER_MessageStreamTokenizer * consoltoken; + /** + * encapsulation of data from the local wlan helper program + */ + struct GNUNET_SERVER_MessageStreamTokenizer *suid_tokenizer; + /** + * encapsulation of packets received from the wlan helper + */ + struct GNUNET_SERVER_MessageStreamTokenizer *data_tokenizer; /** * stdout pipe handle for the gnunet-wlan-helper process @@ -117,129 +231,166 @@ struct Plugin const struct GNUNET_DISK_FileHandle *server_stdin_handle; /** - * ID of select gnunet-nat-server std read task + * ID of the gnunet-wlan-server std read task */ GNUNET_SCHEDULER_TaskIdentifier server_read_task; /** - * ID of select gnunet-nat-server std read task - */ + * ID of the gnunet-wlan-server std read task + */ GNUNET_SCHEDULER_TaskIdentifier server_write_task; /** - * The process id of the server process (if behind NAT) + * ID of the delay task for writing + */ + GNUNET_SCHEDULER_TaskIdentifier server_write_delay_task; + + /** + * The process id of the wlan process */ - pid_t server_pid; + struct GNUNET_OS_Process *server_proc; /** * The interface of the wlan card given to us by the user. */ char *interface; + /** + * Mode of operation for the helper, 0 = normal, 1 = first loopback, 2 = second loopback + */ + long long unsigned int testmode; + /** * The mac_address of the wlan card given to us by the helper. */ - char *mac_address; + struct MacAddress mac_address; /** * Sessions currently pending for transmission - * to this peer, if any. + * to a peer, if any. */ - struct Sessionqueue * pending_Sessions; + struct Sessionqueue *pending_Sessions_head; /** * Sessions currently pending for transmission - * to this peer, if any. + * to a peer (tail), if any. */ - struct Sessionqueue * all_Sessions; - -}; - -//TODO doxigen - -struct Sessionqueue -{ - struct Sessionqueue * next; - struct Sessionqueue * prev; - struct Session * content; -}; - -//TODO doxigen - -struct FragmentQueue -{ - struct FragmentQueue * next; - struct FragmentQueue * prev; - int fragment_num; -}; - -/** - * Session handle for connections. - */ -struct Session -{ + struct Sessionqueue *pending_Sessions_tail; /** - * API requirement. + * number of pending sessions */ - struct SessionHeader header; + unsigned int pendingsessions; /** - * Pointer to the global plugin struct. + * Messages in the sending queues */ - struct Plugin *plugin; + int pending_Fragment_Messages; /** - * Messages currently pending for transmission - * to this peer, if any. + * messages ready for send, head */ - struct PendingMessage *pending_messages_head; - + struct FragmentMessage_queue *sending_messages_head; + /** + * messages ready for send, tail + */ + struct FragmentMessage_queue *sending_messages_tail; /** - * Messages currently pending for transmission - * to this peer, if any. + * time of the next "hello-beacon" */ - struct PendingMessage *pending_messages_tail; + struct GNUNET_TIME_Absolute beacon_time; /** - * To whom are we talking to (set to our identity - * if we are still waiting for the welcome message) + * queue to send acks for received fragments (head) */ - struct GNUNET_PeerIdentity target; + struct AckSendQueue *ack_send_queue_head; /** - * encapsulation of the data + * queue to send acks for received fragments (tail) */ - struct GNUNET_SERVER_MessageStreamTokenizer * datatoken; + struct AckSendQueue *ack_send_queue_tail; /** - * peer mac address + * Tracker for bandwidth limit */ - char addr[6]; + struct GNUNET_BANDWIDTH_Tracker tracker; +}; +/** + * Struct to store data if file write did not accept the whole packet + */ +struct Finish_send +{ /** - * Address of the other peer (either based on our 'connect' - * call or on our 'accept' call). + * pointer to the global plugin struct */ - void *connect_addr; + struct Plugin *plugin; /** - * Last activity on this connection. Used to select preferred - * connection. + * head of the next part to send to the helper */ - struct GNUNET_TIME_Absolute last_activity; + char *head_of_next_write; /** - * current number for message incoming , to distinguish between the messages + * Start of the message to send, needed for free */ - uint32_t message_id_in; + struct GNUNET_MessageHeader *msgstart; /** - * current number for message outgoing, to distinguish between the messages + * rest size to send */ - uint32_t message_id_out; + ssize_t size; +}; + +/** + * Queue of sessions, for the general session queue and the pending session queue + */ +//TODO DOXIGEN +struct Sessionqueue +{ + struct Sessionqueue *next; + struct Sessionqueue *prev; + struct Session *content; +}; + +/** + * Queue of fragmented messages, for the sending queue of the plugin + */ +//TODO DOXIGEN +struct FragmentMessage_queue +{ + struct FragmentMessage_queue *next; + struct FragmentMessage_queue *prev; + struct FragmentMessage *content; +}; +/** + * Queue for the fragments received + */ +//TODO DOXIGEN +struct Receive_Fragment_Queue +{ + struct Receive_Fragment_Queue *next; + struct Receive_Fragment_Queue *prev; + uint16_t num; + const char *msg; + uint16_t size; + struct Radiotap_rx rxinfo; +}; + +//TODO DOXIGEN +struct MacEndpoint_id_fragment_triple +{ + struct MacEndpoint *endpoint; + uint32_t message_id; + struct FragmentMessage *fm; +}; +//TODO DOXIGEN +struct Plugin_Session_pair +{ + struct Plugin *plugin; + struct Session *session; }; /** @@ -248,21 +399,24 @@ struct Session */ struct PendingMessage { - /** - * This is a doubly-linked list. + * dll next */ struct PendingMessage *next; - /** - * This is a doubly-linked list. + * dll prev */ struct PendingMessage *prev; /** * The pending message */ - const char *msg; + struct WlanHeader *msg; + + /** + * Size of the message + */ + size_t message_size; /** * Continuation function to call once the message @@ -274,56 +428,95 @@ 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 +{ + /** - * Timeout value for the pending fragments. - * Stores the time when the last msg fragment ack was received + * next ack in the ack send queue */ - struct GNUNET_TIME_Absolute last_ack; - + struct AckSendQueue *next; /** - * Sorted queue with the acks received for fragments; head + * previous ack in the ack send queue */ + struct AckSendQueue *prev; + /** + * pointer to the session this ack belongs to + */ + struct MacEndpoint *endpoint; + /** + * ID of message, to distinguish between the messages, picked randomly. + */ + uint32_t message_id; - struct FragmentQueue * head; - /** - * Sorted queue with the acks received for fragments; tail + * msg to send + */ + struct GNUNET_MessageHeader *hdr; + /** + * pointer to the ieee wlan header + */ + struct ieee80211_frame *ieeewlanheader; + /** + * pointer to the radiotap header */ + struct Radiotap_Send *radioHeader; +}; - struct FragmentQueue * tail; +/** + * Session infos gathered from a messages + */ +struct Session_light +{ /** - * Size of the message + * the session this message belongs to */ - size_t message_size; + struct Session *session; + /** + * peer mac address + */ + struct MacAddress addr; /** - * pos / next fragment number in the message, for fragmentation/segmentation, - * some acks can be missing but there is still time + * mac endpoint */ - uint32_t message_pos; + struct MacEndpoint *macendpoint; }; - /** - * Header for messages which need fragmentation + * Session handle for connections. */ -struct WlanHeader +struct Session { - struct GNUNET_MessageHeader header; + /** + * API requirement. + */ + struct SessionHeader header; + + /** + * Message currently pending for transmission + * to this peer, if any. head + */ + struct PendingMessage *pending_message_head; /** - * checksum/error correction + * Message currently pending for transmission + * to this peer, if any. tail */ - uint32_t crc GNUNET_PACKED; + struct PendingMessage *pending_message_tail; /** * To whom are we talking to (set to our identity @@ -331,444 +524,1706 @@ struct WlanHeader */ struct GNUNET_PeerIdentity target; - // followed by payload + /** + * Address of the other peer (either based on our 'connect' + * call or on our 'accept' call). + */ + void *connect_addr; + + /** + * Last activity on this connection. Used to select preferred + * connection and timeout + */ + struct GNUNET_TIME_Absolute last_activity; + + /** + * Timeout task. + */ + GNUNET_SCHEDULER_TaskIdentifier timeout_task; + + /** + * peer connection + */ + struct MacEndpoint *mac; + + /** + * count of messages in the fragment out queue for this session + */ + + int fragment_messages_out_count; }; /** - * Header for messages which need fragmentation + * Struct to represent one network card connection */ -struct FragmentationHeader +struct MacEndpoint { + /** + * Pointer to the global plugin struct. + */ + struct Plugin *plugin; + /** + * Struct to hold the session reachable over this mac; head + */ + struct Sessionqueue *sessions_head; + /** + * Struct to hold the session reachable over this mac; tail + */ + struct Sessionqueue *sessions_tail; + /** + * Messages currently sending + * to a peer, if any. + */ + struct FragmentMessage *sending_messages_head; - struct GNUNET_MessageHeader header; + /** + * Messages currently sending + * to a peer (tail), if any. + */ + struct FragmentMessage *sending_messages_tail; + /** + * dll next + */ + struct MacEndpoint *next; + /** + * dll prev + */ + struct MacEndpoint *prev; /** - * To whom are we talking to (set to our identity - * if we are still waiting for the welcome message) + * peer mac address */ - // struct GNUNET_PeerIdentity target GNUNET_PACKED; + struct MacAddress addr; /** - * ID of message, to distinguish between the messages, picked randomly. + * Defrag context for this mac endpoint */ - uint32_t message_id GNUNET_PACKED; + struct GNUNET_DEFRAGMENT_Context *defrag; /** - * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD) + * count of messages in the fragment out queue for this mac endpoint */ - uint16_t fragment_off_or_num GNUNET_PACKED; + + int fragment_messages_out_count; + + //TODO DOXIGEN + uint8_t rate; + uint16_t tx_power; + uint8_t antenna; /** - * CRC of fragment (for error checking) + * Duplicates received */ - uint16_t message_crc GNUNET_PACKED; + int dups; /** - * Flags - * // 0x1 ack => Use two different message types in header.type! (FRAG_MESSAGE; FRAG_ACK) - * // 0x2 has data (not only ack) - * // 0x4 last fragment of message - * // 0x8 new message + * Fragments received */ - // uint32_t flags GNUNET_PACKED; + int fragc; /** - * checksum/error correction + * Acks received */ - // uint32_t crc GNUNET_PACKED; + int acks; - // followed by payload unless ACK + /** + * Last activity on this endpoint. Used to select preferred + * connection. + */ + struct GNUNET_TIME_Absolute last_activity; + /** + * Timeout task. + */ + GNUNET_SCHEDULER_TaskIdentifier timeout_task; }; -//enum { ACK_FRAGMENT = 1, DATA_FRAGMENT = 2, LAST_FRAGMENT = 4, NEW_MESSAGE = 8 }; - -int getRadiotapHeader (struct RadiotapHeader * Header); -int getWlanHeader (struct IeeeHeader * Header); -static int wlan_plugin_address_suggested (void *cls, - const void *addr, - size_t addrlen); -uint16_t getcrc16 (const char *msgbuf, size_t msgbuf_size); - /** - * get the next message number, at the moment just a random one - * + * Struct for Messages in the fragment queue */ -uint32_t -get_next_message_id() +struct FragmentMessage { - // FIXME find good random generator - if (RAND_MAX < UINT32_MAX){ - return (random() * random()) % UINT32_MAX; - } else { - return random() % UINT32_MAX; - } -} -/** - * start next message number generator - */ + /** + * Session this message belongs to + */ -void -start_next_message_id() -{ - //FIXME not good - srand(GNUNET_TIME_absolute_get().value); -} + struct Session *session; + /** + * This is a doubly-linked list. + */ + struct FragmentMessage *next; -/** - * get Session from address - * - */ -//TODO doxigen -//TODO add other possibilities to find the right session (are there other?) -static struct Session * -get_Session (struct Plugin *plugin, - const char * addr) -{ - struct Sessionqueue * queue = plugin->all_Sessions; - struct Sessionqueue * lastitem = NULL; - - - //just look at all the session for the needed one - while (queue != NULL){ - // content is never NULL - GNUNET_assert (queue->content == NULL); - char * addr2 = queue->content->addr; - if (memcmp(addr, addr2, 6) == 0) - { - //sesion found - return queue->content; - } - // try next - lastitem = queue; - queue = queue->next; - } - // new session - queue = GNUNET_malloc (sizeof (struct Sessionqueue)); - - if (plugin->all_Sessions == NULL){ - //is first session - plugin->all_Sessions = queue; - } else { - lastitem->next = queue; - queue->prev = lastitem; - } - - queue->content = GNUNET_malloc (sizeof (struct Session)); - queue->content->plugin = plugin; - memcpy(queue->content->addr, addr, 6); - queue->content->message_id_out = get_next_message_id(); - - //queue welcome message for new sessions, not realy needed - //struct WelcomeMessage welcome; - struct PendingMessage *pm; - pm = GNUNET_malloc (sizeof (struct PendingMessage) + GNUNET_HELLO_size(* (plugin->env->our_hello))); - pm->msg = (const char*) &pm[1]; - pm->message_size = GNUNET_HELLO_size(* (plugin->env->our_hello)); - //welcome.header.size = htons (GNUNET_HELLO_size(* (plugin->env->our_hello))); - //welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT); - //welcome.clientIdentity = *plugin->env->my_identity; - memcpy (&pm[1], * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello))); - pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS; - GNUNET_CONTAINER_DLL_insert ((queue->content)->pending_messages_head, - (queue->content)->pending_messages_tail, - pm); - - return queue->content; + /** + * This is a doubly-linked list. + */ + struct FragmentMessage *prev; -} + /** + * Fragmentation context + */ + struct GNUNET_FRAGMENT_Context *fragcontext; -/** - * Queue the session to send data - */ -//TODO doxigen -static void -queue_Session (struct Plugin *plugin, - struct Session * session) -{ - struct Sessionqueue * queue = plugin->pending_Sessions; - struct Sessionqueue * lastitem = NULL; - - while (queue != NULL){ - // content is never NULL - GNUNET_assert (queue->content == NULL); - // is session already in queue? - if (session == queue->content){ - return; - } - // try next - lastitem = queue; - queue = queue->next; - } - - // Session is not in the queue - - queue = GNUNET_malloc (sizeof (struct Sessionqueue)); - if (plugin->pending_Sessions == NULL){ - //is first session - plugin->pending_Sessions = queue; - } else { - lastitem->next = queue; - queue->prev = lastitem; - } - - queue->content = session; + /** + * Timeout value for the message. + */ + struct GNUNET_TIME_Absolute timeout; -} + /** + * Timeout task. + */ + GNUNET_SCHEDULER_TaskIdentifier timeout_task; -/** - * Function called to when wlan helper is ready to get some data - * - * @param cls closure - * @param GNUNET_SCHEDULER_TaskContext + /** + * Fragment to send + */ + char *frag; + + /** + * size of message + */ + size_t size; + + /** + * pointer to the ieee wlan header + */ + struct ieee80211_frame *ieeewlanheader; + /** + * pointer to the radiotap header + */ + struct Radiotap_Send *radioHeader; +}; + +static void +do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); +static void +free_session (struct Plugin *plugin, struct Sessionqueue *queue, + int do_free_macendpoint); +static struct MacEndpoint * +create_macendpoint (struct Plugin *plugin, const struct MacAddress *addr); + +static void +finish_sending (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); + +/** + * Generates a nice hexdump of a memory area. + * + * \param mem pointer to memory to dump + * \param length how many bytes to dump + */ +static void +hexdump (const void *mem, unsigned length) +{ + char line[80]; + char *src = (char *) mem; + + printf ("dumping %u bytes from %p\r\n" + " 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF\r\n", + length, src); + unsigned i; + int j; + + for (i = 0; i < length; i += 16, src += 16) + { + char *t = line; + + t += sprintf (t, "%04x: ", i); + for (j = 0; j < 16; j++) + { + if (i + j < length) + t += sprintf (t, "%02X", src[j] & 0xff); + else + t += sprintf (t, " "); + + t += sprintf (t, j % 2 ? " " : "-"); + } + + t += sprintf (t, " "); + for (j = 0; j < 16; j++) + { + if (i + j < length) + { + if (isprint ((unsigned char) src[j])) + t += sprintf (t, "%c", src[j]); + else + t += sprintf (t, "."); + } + else + { + t += sprintf (t, " "); + } + } + + t += sprintf (t, "\r\n"); + printf ("%s", line); + } +} + +/** + * Function to find a MacEndpoint with a specific mac addr + * @param plugin pointer to the plugin struct + * @param addr pointer to the mac address + * @param create_new GNUNET_YES if a new end point should be created + * @return + */ +static struct MacEndpoint * +get_macendpoint (struct Plugin *plugin, const struct MacAddress *addr, + int create_new) +{ + struct MacEndpoint *queue = plugin->mac_head; + + while (queue != NULL) + { + //GNUNET_assert (queue->sessions_head != NULL); + if (memcmp (addr, &queue->addr, sizeof (struct MacAddress)) == 0) + return queue; /* session found */ + queue = queue->next; + } + + if (create_new == GNUNET_YES) + { + return create_macendpoint (plugin, addr); + } + else + { + return NULL; + } + +} + +/** + * search for a session with the macendpoint and peer id + * + * @param plugin pointer to the plugin struct + * @param endpoint pointer to the mac endpoint of the peer + * @param peer pointer to the peerid + * @return returns the session + */ +static struct Session * +search_session (struct Plugin *plugin, const struct MacEndpoint *endpoint, + const struct GNUNET_PeerIdentity *peer) +{ + GNUNET_assert (endpoint != NULL); + struct Sessionqueue *queue = endpoint->sessions_head; + + while (queue != NULL) + { + GNUNET_assert (queue->content != NULL); + if (memcmp + (peer, &queue->content->target, + sizeof (struct GNUNET_PeerIdentity)) == 0) + return queue->content; /* session found */ + queue = queue->next; + } + return NULL; +} + +/** + * Function called for a quick conversion of the binary address to + * a numeric address. Note that the caller must not free the + * address and that the next call to this function is allowed + * to override the address again. + * + * @param cls closure + * @param 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 endpoint pointer to the mac endpoint of the peer + * @param peer peer identity to use for this session + * @return returns the session + */ + +static struct Session * +create_session (struct Plugin *plugin, struct MacEndpoint *endpoint, + const struct GNUNET_PeerIdentity *peer) +{ + GNUNET_assert (endpoint != NULL); + GNUNET_assert (plugin != NULL); + GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan session created"), 1, + GNUNET_NO); + struct Sessionqueue *queue = + GNUNET_malloc (sizeof (struct Sessionqueue) + sizeof (struct Session)); + + GNUNET_CONTAINER_DLL_insert_tail (endpoint->sessions_head, + endpoint->sessions_tail, queue); + + queue->content = (struct Session *) &queue[1]; + queue->content->mac = endpoint; + memcpy (&(queue->content->target), peer, sizeof (struct GNUNET_PeerIdentity)); + queue->content->last_activity = GNUNET_TIME_absolute_get (); + queue->content->timeout_task = + GNUNET_SCHEDULER_add_delayed (SESSION_TIMEOUT, &session_timeout, queue); + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "New session %p with endpoint %p: %s\n", queue->content, + endpoint, wlan_plugin_address_to_string (NULL, + endpoint->addr.mac, + 6)); +#endif + + return queue->content; +} + +/** + * Get session from address, create if no session exists + * + * @param plugin pointer to the plugin struct + * @param addr pointer to the mac address of the peer + * @param peer pointer to the peerid + * @return returns the session + */ +static struct Session * +get_session (struct Plugin *plugin, const struct MacAddress *addr, + const struct GNUNET_PeerIdentity *peer) +{ + struct MacEndpoint *mac; + + mac = get_macendpoint (plugin, addr, GNUNET_YES); + struct Session *session = search_session (plugin, mac, peer); + + if (session != NULL) + 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 + */ +static void +queue_session (struct Plugin *plugin, struct Session *session) +{ + 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); + } + +} + +/** + * Function to schedule the write task, executed after a delay + * @param cls pointer to the plugin struct + * @param tc GNUNET_SCHEDULER_TaskContext pointer + */ +static void +delay_fragment_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Plugin *plugin = cls; + + plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK; + + 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); + } +} + +/** + * Function to calculate the time of the next periodic "hello-beacon" + * @param plugin pointer to the plugin struct + */ + +static void +set_next_beacon_time (struct Plugin *const plugin) +{ + //under 10 known peers: once a second + if (plugin->mac_count < 10) + { + plugin->beacon_time = + GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), + GNUNET_TIME_relative_multiply + (GNUNET_TIME_UNIT_SECONDS, + HELLO_BEACON_SCALING_FACTOR)); + } + //under 30 known peers: every 10 seconds + else if (plugin->mac_count < 30) + { + plugin->beacon_time = + GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), + GNUNET_TIME_relative_multiply + (GNUNET_TIME_UNIT_SECONDS, + 10 * HELLO_BEACON_SCALING_FACTOR)); + } + //over 30 known peers: once a minute + else + { + plugin->beacon_time = + GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), + GNUNET_TIME_relative_multiply + (GNUNET_TIME_UNIT_MINUTES, + HELLO_BEACON_SCALING_FACTOR)); + } +} + +/** + * Function to set the timer for the next timeout of the fragment queue + * @param plugin the handle to the plugin struct + */ + +static void +set_next_send (struct Plugin *const plugin) +{ + struct GNUNET_TIME_Relative next_send; + + //cancel old task + if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (plugin->server_write_delay_task); + plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK; + } + + //check if some acks are in the queue + if (plugin->ack_send_queue_head != NULL) + { + next_send = GNUNET_TIME_UNIT_ZERO; + } + + //check if there are some fragments in the queue + else if (plugin->sending_messages_head != NULL) + { + next_send = GNUNET_TIME_UNIT_ZERO; + } + else + { + next_send = GNUNET_TIME_absolute_get_remaining (plugin->beacon_time); + } + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Next packet is send in: %u\n", next_send.rel_value); +#endif + + if (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) + { + plugin->server_write_delay_task = + GNUNET_SCHEDULER_add_delayed (next_send, &delay_fragment_task, + plugin); + } + } +} + +/** + * Function to get the next queued Session, removes the session from the queue + * @param plugin pointer to the plugin struct + * @return pointer to the session found, returns NULL if there is now session in the queue + */ +static struct Session * +get_next_queue_session (struct Plugin *plugin) +{ + struct Session *session; + struct Sessionqueue *sessionqueue; + struct Sessionqueue *sessionqueue_alt; + struct PendingMessage *pm; + + sessionqueue = plugin->pending_Sessions_head; + + while (sessionqueue != NULL) + { + session = sessionqueue->content; + + GNUNET_assert (session != NULL); + pm = session->pending_message_head; + + if (pm == NULL) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "pending message is empty, should not happen. session %p\n", + session); +#endif + sessionqueue_alt = sessionqueue; + sessionqueue = sessionqueue->next; + plugin->pendingsessions--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending sessions"), + plugin->pendingsessions, GNUNET_NO); + GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head, + plugin->pending_Sessions_tail, + sessionqueue_alt); + + GNUNET_free (sessionqueue_alt); + continue; + + } + + //check for message timeout + if (GNUNET_TIME_absolute_get_remaining (pm->timeout).rel_value > 0) + { + //check if session has no message in the fragment queue + if ((session->mac->fragment_messages_out_count < + FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT) && + (session->fragment_messages_out_count < + FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION)) + { + plugin->pendingsessions--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending sessions"), + plugin->pendingsessions, GNUNET_NO); + GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head, + plugin->pending_Sessions_tail, + sessionqueue); + GNUNET_free (sessionqueue); + + return session; + } + else + { + sessionqueue = sessionqueue->next; + } + } + else + { + GNUNET_CONTAINER_DLL_remove (session->pending_message_head, + session->pending_message_tail, pm); + + //call the cont func that it did not work + if (pm->transmit_cont != NULL) + pm->transmit_cont (pm->transmit_cont_cls, &(session->target), + GNUNET_SYSERR); + GNUNET_free (pm->msg); + GNUNET_free (pm); + + if (session->pending_message_head == NULL) + { + sessionqueue_alt = sessionqueue; + sessionqueue = sessionqueue->next; + plugin->pendingsessions--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending sessions"), + plugin->pendingsessions, GNUNET_NO); + GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head, + plugin->pending_Sessions_tail, + sessionqueue_alt); + + GNUNET_free (sessionqueue_alt); + } + } + + } + return NULL; +} + +/** + * frees the space of a message in the fragment queue (send queue) + * @param plugin the plugin struct + * @param fm message to free + */ +static void +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; + + fmq = plugin->sending_messages_head; + while (fmq != NULL) + { + fmq_next = fmq->next; + if (fmq->content == fm) + { + GNUNET_CONTAINER_DLL_remove (plugin->sending_messages_head, + plugin->sending_messages_tail, fmq); + GNUNET_free (fmq); + } + fmq = fmq_next; + } + + (session->mac->fragment_messages_out_count)--; + session->fragment_messages_out_count--; + plugin->pending_Fragment_Messages--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending fragments"), + plugin->pending_Fragment_Messages, GNUNET_NO); + 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); + fm->timeout_task = GNUNET_SCHEDULER_NO_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 +} + +/** + * 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) +{ + + 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)); + +#endif + + return GNUNET_YES; +} + +/** + * 32bit CRC + * + * @param msgbuf pointer tor the data + * @param msgbuf_size size of the data + * + * @return 32bit crc value + */ + +uint32_t +getcrc32 (const char *msgbuf, size_t msgbuf_size) +{ + + return GNUNET_CRYPTO_crc32_n (msgbuf, msgbuf_size);; +} + +/** + * 16bit CRC + * + * @param msgbuf pointer tor the data + * @param msgbuf_size size of the data + * + * @return 16bit crc value + */ + +uint16_t +getcrc16 (const char *msgbuf, size_t msgbuf_size) +{ + //TODO calc some crc + return 0; +} + +/** + * function to add a fragment of a message to send + * @param cls FragmentMessage this message belongs to + * @param hdr pointer to the start of the message + */ + +void +add_message_for_send (void *cls, const struct GNUNET_MessageHeader *hdr) +{ + + struct FragmentMessage *fm = cls; + struct FragmentMessage_queue *fmqueue; + + GNUNET_assert (cls != NULL); + GNUNET_assert (fm->frag == NULL); + struct MacEndpoint *endpoint = fm->session->mac; + struct Plugin *plugin = endpoint->plugin; + struct GNUNET_MessageHeader *msgheader; + struct GNUNET_MessageHeader *msgheader2; + uint16_t size; + +#if DEBUG_wlan_retransmission > 1 + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Adding fragment of message %p to send, session %p, endpoint %p, type %u\n", + fm, fm->session, endpoint, hdr->type); +#endif + + size = + sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_Send) + + sizeof (struct ieee80211_frame) + ntohs (hdr->size); + fm->frag = GNUNET_malloc (size); + fm->size = size; + + msgheader = (struct GNUNET_MessageHeader *) fm->frag; + msgheader->size = htons (size); + msgheader->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA); + + fm->radioHeader = (struct Radiotap_Send *) &msgheader[1]; + fm->ieeewlanheader = (struct ieee80211_frame *) &fm->radioHeader[1]; + msgheader2 = (struct GNUNET_MessageHeader *) &fm->ieeewlanheader[1]; + memcpy (msgheader2, hdr, ntohs (hdr->size)); + + fmqueue = GNUNET_malloc (sizeof (struct FragmentMessage_queue)); + fmqueue->content = fm; + + GNUNET_CONTAINER_DLL_insert_tail (plugin->sending_messages_head, + plugin->sending_messages_tail, fmqueue); + set_next_send (plugin); +} + + +/** + * We have been notified that wlan-helper has written something to stdout. + * Handle the output, then reschedule this function to be called again once + * more is available. + * + * @param cls the plugin handle + * @param tc the scheduling context + */ +static void +wlan_plugin_helper_read (void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Plugin *plugin = cls; + + plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK; + + if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) + return; + + char mybuf[WLAN_MTU + sizeof (struct GNUNET_MessageHeader)]; + ssize_t bytes; + + bytes = + GNUNET_DISK_file_read (plugin->server_stdout_handle, mybuf, + sizeof (mybuf)); + if (bytes <= 0) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + _ + ("Finished reading from wlan-helper stdout with code: %d\n"), + bytes); +#endif + return; + } + GNUNET_SERVER_mst_receive (plugin->suid_tokenizer, NULL, mybuf, bytes, + GNUNET_NO, GNUNET_NO); + + GNUNET_assert (plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK); + plugin->server_read_task = + GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL, + plugin->server_stdout_handle, + &wlan_plugin_helper_read, plugin); +} + +/** + * Start the gnunet-wlan-helper process. + * + * @param plugin the transport plugin + * @return GNUNET_YES if process was started, GNUNET_SYSERR on error + */ +static int +wlan_transport_start_wlan_helper (struct Plugin *plugin) +{ + const char *filenamehw = "gnunet-transport-wlan-helper"; + char *filenameloopback = "gnunet-transport-wlan-helper-dummy"; + char *absolute_filename = NULL; + + 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; + + if ((plugin->testmode == 1) || (plugin->testmode == 2)) + { + if (GNUNET_OS_check_helper_binary (filenameloopback) == GNUNET_YES) + { + absolute_filename = strdup (filenameloopback); + } + else + { + char cwd[FILENAME_MAX]; + + GNUNET_assert (getcwd (cwd, sizeof (cwd)) != NULL); + + GNUNET_asprintf (&absolute_filename, "%s%s%s", cwd, DIR_SEPARATOR_STR, + filenameloopback); + + if (GNUNET_DISK_file_test (filenameloopback) != GNUNET_YES) + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "Helper `%s' not found! %i\n", absolute_filename); + GNUNET_break (0); + } + } + } + + /* Start the server process */ + + if (plugin->testmode == 0) + { + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Starting gnunet-wlan-helper process cmd: %s %s %i\n", + filenamehw, plugin->interface, plugin->testmode); +#endif + + if (GNUNET_OS_check_helper_binary (filenamehw) == GNUNET_YES) + { + plugin->server_proc = + GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout, + filenamehw, filenamehw, plugin->interface, + NULL); + } + else if (GNUNET_OS_check_helper_binary (filenamehw) == GNUNET_NO) + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "gnunet-transport-wlan-helper is not suid, please change it or look at the doku\n"); + GNUNET_break (0); + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "gnunet-transport-wlan-helper not found, please look if it exists and is the $PATH variable!\n"); + GNUNET_break (0); + } + + } + else if (plugin->testmode == 1) + { + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, + "Starting gnunet-wlan-helper loopback 1 process cmd: %s %s %i\n", + absolute_filename, plugin->interface, plugin->testmode); +#endif + plugin->server_proc = + GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout, + absolute_filename, absolute_filename, "1", + NULL); + if (plugin->server_proc == NULL) + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "`%s' not found, please look if it exists and is in the $PATH variable!\n", + absolute_filename); + GNUNET_break (0); + } + } + else if (plugin->testmode == 2) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, + "Starting gnunet-wlan-helper loopback 2 process cmd: %s %s %i\n", + absolute_filename, plugin->interface, plugin->testmode); +#endif + + plugin->server_proc = + GNUNET_OS_start_process (plugin->server_stdin, plugin->server_stdout, + absolute_filename, absolute_filename, "2", + NULL); + if (plugin->server_proc == NULL) + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + "`%s' not found, please look if it exists and is in the $PATH variable!\n", + absolute_filename); + GNUNET_break (0); + } + } + if (absolute_filename != NULL) + GNUNET_free (absolute_filename); + if (plugin->server_proc == NULL) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Failed to start gnunet-wlan-helper process\n"); +#endif + return GNUNET_SYSERR; + } + + + + /* Close the write end of the read pipe */ + GNUNET_DISK_pipe_close_end (plugin->server_stdout, + GNUNET_DISK_PIPE_END_WRITE); + + /* Close the read end of the write pipe */ + GNUNET_DISK_pipe_close_end (plugin->server_stdin, GNUNET_DISK_PIPE_END_READ); + + plugin->server_stdout_handle = + GNUNET_DISK_pipe_handle (plugin->server_stdout, + GNUNET_DISK_PIPE_END_READ); + plugin->server_stdin_handle = + GNUNET_DISK_pipe_handle (plugin->server_stdin, + GNUNET_DISK_PIPE_END_WRITE); + + GNUNET_assert (plugin->server_read_task == GNUNET_SCHEDULER_NO_TASK); + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Adding server_read_task for the wlan-helper\n"); +#endif + + plugin->server_read_task = + GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL, + plugin->server_stdout_handle, + &wlan_plugin_helper_read, plugin); + + return GNUNET_YES; +} + +/** + * Stops the gnunet-wlan-helper process. + * + * @param plugin the transport plugin + * @return GNUNET_YES if process was started, GNUNET_SYSERR on error */ +static int +wlan_transport_stop_wlan_helper (struct Plugin *plugin) +{ +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Stoping WLAN helper process\n"); +#endif + + if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (plugin->server_write_delay_task); + plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK; + } + + if (plugin->server_write_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (plugin->server_write_task); + plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; + } + if (plugin->server_read_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (plugin->server_read_task); + plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK; + } + + GNUNET_DISK_pipe_close (plugin->server_stdout); + GNUNET_DISK_pipe_close (plugin->server_stdin); + GNUNET_OS_process_kill (plugin->server_proc, SIGKILL); + GNUNET_OS_process_wait (plugin->server_proc); + 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 -do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +delay_restart_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { - struct Plugin * plugin = cls; - ssize_t bytes; + struct Finish_send *finish = cls; + struct Plugin *plugin; - if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) + plugin = finish->plugin; + + plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; + if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason)) + { + GNUNET_free_non_null (finish->msgstart); + GNUNET_free (finish); return; + } + + wlan_transport_start_wlan_helper (plugin); + + if (finish->size != 0) + { + plugin->server_write_task = + GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL, + plugin->server_stdin_handle, + &finish_sending, finish); + } + else + { + set_next_send (plugin); + GNUNET_free_non_null (finish->msgstart); + GNUNET_free (finish); + } + +} + +/** + * Function to restart the helper + * @param plugin pointer to the global plugin struct + * @param finish pointer to the Finish_send struct to finish + */ +static void +restart_helper (struct Plugin *plugin, struct Finish_send *finish) +{ + static struct GNUNET_TIME_Relative next_try = { 1000 }; + GNUNET_assert (finish != NULL); + + wlan_transport_stop_wlan_helper (plugin); + plugin->server_write_task = + GNUNET_SCHEDULER_add_delayed (next_try, &delay_restart_helper, finish); + GNUNET_TIME_relative_multiply (next_try, HELPER_RESTART_SCALING_FACTOR); + +} + +/** + * function to finish a sending if not all could have been writen befor + * @param cls pointer to the Finish_send struct + * @param tc TaskContext + */ +static void +finish_sending (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Finish_send *finish = cls; + struct Plugin *plugin; + ssize_t bytes; + + plugin = finish->plugin; + plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; - struct Session * session; - struct Sessionqueue * queue; - struct PendingMessage * pm; - struct IeeeHeader * wlanheader; - struct RadiotapHeader * radioHeader; - struct GNUNET_MessageHeader * msgheader; - struct FragmentationHeader fragheader; - uint16_t size = 0; - const char * copystart = NULL; - uint16_t copysize = 0; - uint copyoffset = 0; - struct FragmentQueue * akt = NULL; - int exit = 0; - - queue = plugin->pending_Sessions; - - //check if the are some pending sessions/messages ... - GNUNET_assert(queue != NULL); - - session = queue->content; - GNUNET_assert(session != NULL); - - pm = session->pending_messages_head; - GNUNET_assert(pm != NULL); - - //check if msg is valid to send - if (GNUNET_TIME_absolute_get_remaining(pm->timeout).value > 0){ - // split msg if to large - - if (pm->message_size > WLAN_MTU) { - size += sizeof(struct FragmentationHeader); - // check for retransmission - if (GNUNET_TIME_absolute_get_duration(pm->last_ack).value > FRAGMENT_TIMEOUT) { - // TODO retransmit - // be positive and try again later :-D - pm->last_ack = GNUNET_TIME_absolute_get(); - // find first missing fragment - exit = 0; - akt = pm->head; - pm->message_pos = 0; - - //test if ack was already received - if (akt != NULL) { - while (exit == 0){ - //if fragment is present, take next - if (akt->fragment_num == pm->message_pos) { - pm->message_pos ++; - } - //next ack is bigger then the fragment number - //in case there is something like this: (acks) 1, 2, 5, 6, ... - //and we send 3 again, the next number should be 4 - if (akt->fragment_num > pm->message_pos) { - exit = 1; - } - - akt = akt->next; - //test if this was the last ack - if (akt == NULL){ - exit = 1; - } - - } - } - - } - - copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader)) * pm->message_pos; - fragheader.fragment_off_or_num = pm->message_pos; - fragheader.message_id = session->message_id_out; - - // start should be smaller then the packet size - //TODO send some other data if everything was send but not all acks are present - GNUNET_assert(copyoffset < pm->message_size); - copystart = pm->msg + copyoffset; - - //size of the fragment is either the MTU - overhead - //or the missing part of the message in case this is the last fragment - copysize = GNUNET_MIN(pm->message_size - copyoffset, - WLAN_MTU - sizeof(struct FragmentationHeader)); - fragheader.header.size = copysize; - fragheader.header.type = GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT; - - //get the next missing fragment - exit = 0; - akt = pm->head; - pm->message_pos ++; - - //test if ack was already received - if (akt != NULL) { - while (exit == 0){ - //if fragment is present, take next - if (akt->fragment_num == pm->message_pos) { - pm->message_pos ++; - } - //next ack is bigger then the fragment number - //in case there is something like this: (acks) 1, 2, 5, 6, ... - //and we send 3 again, the next number should be 4 - if (akt->fragment_num > pm->message_pos) { - exit = 1; - } - - akt = akt->next; - //test if this was the last ack - if (akt == NULL){ - exit = 1; - } - - } - } - - } else { - // there is no need to split - copystart = pm->msg; - copysize = pm->message_size; - } - size += copysize; - size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader) - + sizeof(struct GNUNET_MessageHeader); - msgheader = GNUNET_malloc(size); - msgheader->size = htons(size - sizeof(struct GNUNET_MessageHeader)); - msgheader->type = GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA; - - radioHeader = (struct RadiotapHeader*) &msgheader[1]; - getRadiotapHeader(radioHeader); - - wlanheader = (struct IeeeHeader *) &radioHeader[1]; - getWlanHeader(wlanheader); - - - //could be faster if content is just send and not copyed before - //fragmentheader is needed - if (pm->message_size > WLAN_MTU){ - fragheader.message_crc = getcrc16(copystart, copysize); - memcpy(&wlanheader[1],&fragheader, sizeof(struct FragmentationHeader)); - memcpy(&wlanheader[1] + sizeof(struct FragmentationHeader),copystart,copysize); - } else { - memcpy(&wlanheader[1],copystart,copysize); - } - - bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size); - - - } else { - //remove message - //TODO free the queues (acks) - GNUNET_CONTAINER_DLL_remove (session->pending_messages_head, - session->pending_messages_tail, - pm); - GNUNET_free(pm); - - } - - - + 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 < 1) + if (bytes != finish->size) + { + if (bytes != GNUNET_SYSERR) { - return; + 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) +{ - //plugin->server_read_task = - //GNUNET_SCHEDULER_add_read_file (plugin->env->sched, - // GNUNET_TIME_UNIT_FOREVER_REL, - // plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin); +#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); +} + /** - * If we have pending messages, ask the server to - * transmit them (schedule the respective tasks, etc.) + * 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 Plugin env to get everything needed + */ + +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 -process_pending_messages (struct Plugin * plugin) +fragmentmessage_timeout (void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) { - struct Sessionqueue * queue; - struct Session * session; + struct FragmentMessage *fm = cls; - if (plugin->pending_Sessions == NULL) + 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 + */ - queue = plugin->pending_Sessions; - //contet should not be empty - GNUNET_assert(queue->content != NULL); +static void +check_fragment_queue (struct Plugin *plugin) +{ + struct Session *session; + struct FragmentMessage *fm; + struct GNUNET_PeerIdentity pid; - session = queue->content; - //pending sessions should have some msg - GNUNET_assert(session->pending_messages_head != NULL); + struct PendingMessage *pm; - // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg - plugin->server_write_task - = GNUNET_SCHEDULER_add_write_file(plugin->env->sched, - GNUNET_TIME_UNIT_FOREVER_REL, - plugin->server_stdin_handle, - &do_transmit, - plugin); + if (plugin->pending_Fragment_Messages < FRAGMENT_QUEUE_SIZE) + { + session = get_next_queue_session (plugin); + if (session != NULL) + { + pm = session->pending_message_head; + GNUNET_assert (pm != NULL); + GNUNET_CONTAINER_DLL_remove (session->pending_message_head, + session->pending_message_tail, pm); + session->mac->fragment_messages_out_count++; + session->fragment_messages_out_count++; + plugin->pending_Fragment_Messages++; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending fragments"), + plugin->pending_Fragment_Messages, GNUNET_NO); + + fm = GNUNET_malloc (sizeof (struct FragmentMessage)); + fm->session = session; + fm->timeout.abs_value = pm->timeout.abs_value; + fm->frag = NULL; + fm->fragcontext = + GNUNET_FRAGMENT_context_create (plugin->env->stats, WLAN_MTU, + &plugin->tracker, + GNUNET_TIME_UNIT_SECONDS, + &(pm->msg->header), + &add_message_for_send, fm); + fm->timeout_task = + GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining + (fm->timeout), fragmentmessage_timeout, + fm); + GNUNET_CONTAINER_DLL_insert_tail (session->mac->sending_messages_head, + session->mac->sending_messages_tail, + fm); + + if (pm->transmit_cont != NULL) + { + pid = session->target; + pm->transmit_cont (pm->transmit_cont_cls, &pid, GNUNET_OK); +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "called pm->transmit_cont for %p\n", session); +#endif + } + else + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "no pm->transmit_cont for %p\n", session); +#endif + } + GNUNET_free (pm); + + if (session->pending_message_head != NULL) + { + //requeue session + queue_session (plugin, session); + } + + } + } + + //check if timeout changed + set_next_send (plugin); } +/** + * Function to send an ack, does not free the ack + * @param plugin pointer to the plugin + */ +static void +send_ack (struct Plugin *plugin) +{ + + ssize_t bytes; + struct AckSendQueue *ack; + struct Finish_send *finish; + + ack = plugin->ack_send_queue_head; + + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Sending ack for message_id %u for mac endpoint %p, size %u\n", + ack->message_id, ack->endpoint, + ntohs (ack->hdr->size) - sizeof (struct Radiotap_Send)); +#endif + + GNUNET_assert (plugin != NULL); + GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan acks send"), 1, + GNUNET_NO); + + getRadiotapHeader (plugin, ack->endpoint, ack->radioHeader); + getWlanHeader (ack->ieeewlanheader, &ack->endpoint->addr, plugin, + ntohs (ack->hdr->size)); + + bytes = + GNUNET_DISK_file_write (plugin->server_stdin_handle, ack->hdr, + ntohs (ack->hdr->size)); + if (bytes == GNUNET_SYSERR) + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + _ + ("Error writing to wlan healper. errno == %d, ERROR: %s\n"), + errno, strerror (errno)); + finish = GNUNET_malloc (sizeof (struct Finish_send)); + finish->plugin = plugin; + finish->head_of_next_write = NULL; + finish->size = 0; + finish->msgstart = NULL; + restart_helper (plugin, finish); + } + else + { + GNUNET_assert (bytes == ntohs (ack->hdr->size)); + GNUNET_CONTAINER_DLL_remove (plugin->ack_send_queue_head, + plugin->ack_send_queue_tail, ack); + GNUNET_free (ack); + set_next_send (plugin); + } +} /** - * 32bit CRC - * - * @param msgbuf pointer tor the data - * @param msgbuf_size size of the data + * Function called when wlan helper is ready to get some data * - * @return 32bit crc value + * @param cls closure + * @param tc GNUNET_SCHEDULER_TaskContext */ +static void +do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Plugin *plugin = cls; -uint32_t -getcrc32 (const char *msgbuf, - size_t msgbuf_size){ - //TODO calc some crc - return 0; + 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"); } /** - * 16bit CRC - * - * @param msgbuf pointer tor the data - * @param msgbuf_size size of the data + * Another peer has suggested an address for this + * peer and transport plugin. Check that this could be a valid + * address. If so, consider adding it to the list + * of addresses. * - * @return 16bit crc value + * @param cls closure + * @param addr pointer to the address + * @param addrlen length of addr + * @return GNUNET_OK if this is a plausible address for this peer + * and transport */ +static int +wlan_plugin_address_suggested (void *cls, const void *addr, size_t addrlen) +{ + //struct Plugin *plugin = cls; -uint16_t -getcrc16 (const char *msgbuf, - size_t msgbuf_size){ - //TODO calc some crc - return 0; + /* check if the address is plausible; if so, + * add it to our list! */ + + GNUNET_assert (cls != NULL); + //FIXME mitm is not checked + //Mac Address has 6 bytes + if (addrlen == 6) + { + /* TODO check for bad addresses like multicast, broadcast, etc */ +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "wlan_plugin_address_suggested got good address, size %u!\n", + addrlen); +#endif + return GNUNET_OK; + } +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "wlan_plugin_address_suggested got bad address, size %u!\n", + addrlen); +#endif + return GNUNET_SYSERR; } /** @@ -780,7 +2235,7 @@ getcrc16 (const char *msgbuf, * @param priority how important is the message * @param msgbuf the message to transmit * @param msgbuf_size number of bytes in 'msgbuf' - * @param timeout when should we time out + * @param timeout when should we time out * @param session which session must be used (or NULL for "any") * @param addr the address to use (can be NULL if the plugin * is "on its own" (i.e. re-use existing TCP connection)) @@ -798,94 +2253,223 @@ getcrc16 (const char *msgbuf, * and does NOT mean that the message was not transmitted (DV) */ static ssize_t -wlan_plugin_send (void *cls, - const struct GNUNET_PeerIdentity * target, - const char *msgbuf, - size_t msgbuf_size, - unsigned int priority, - struct GNUNET_TIME_Relative timeout, - struct Session *session, - const void *addr, - size_t addrlen, - int force_address, - GNUNET_TRANSPORT_TransmitContinuation cont, - void *cont_cls) +wlan_plugin_send (void *cls, const struct GNUNET_PeerIdentity *target, + const char *msgbuf, size_t msgbuf_size, unsigned int priority, + struct GNUNET_TIME_Relative timeout, struct Session *session, + const void *addr, size_t addrlen, int force_address, + GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls) { - struct Plugin * plugin = cls; - struct PendingMessage * newmsg = NULL; - struct WlanHeader * wlanheader = NULL; + struct Plugin *plugin = cls; + struct PendingMessage *newmsg; + struct WlanHeader *wlanheader; + + GNUNET_assert (plugin != NULL); //check if msglen > 0 - GNUNET_assert(msgbuf_size > 0); + GNUNET_assert (msgbuf_size > 0); //get session if needed - if (session == NULL) { - if ( wlan_plugin_address_suggested(plugin , addr, addrlen) == GNUNET_OK){ - session = get_Session(plugin, addr); - } else { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("Wlan Address len %d is wrong\n"), - addrlen); - return -1; - } + if (session == NULL) + { + if (wlan_plugin_address_suggested (plugin, addr, addrlen) == GNUNET_OK) + { + session = get_session (plugin, addr, target); + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, PLUGIN_LOG_NAME, + _("Wlan Address len %d is wrong\n"), addrlen); + return -1; + } } - //TODO target "problem" not solved - session->target = *target; + GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan messages queued"), 1, + GNUNET_NO); //queue message: - //first queue session - queue_Session(plugin, session); //queue message in session - newmsg = GNUNET_malloc(sizeof(struct PendingMessage) + msgbuf_size + sizeof(struct WlanHeader)); - newmsg->msg = (const char*) &newmsg[1]; - wlanheader = (struct WlanHeader *) &newmsg[1]; + //test if there is no other message in the "queue" + //FIXME: to many send requests + if (session->pending_message_head != NULL) + { + newmsg = session->pending_message_head; + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "wlan_plugin_send: a pending message is already in the queue for this client\n remaining time to send this message is %u, queued fragment messages for this mac connection %u\n", + GNUNET_TIME_absolute_get_remaining (newmsg-> + timeout).rel_value, + session->mac->fragment_messages_out_count); + } + + newmsg = GNUNET_malloc (sizeof (struct PendingMessage)); + newmsg->msg = GNUNET_malloc (msgbuf_size + sizeof (struct WlanHeader)); + wlanheader = newmsg->msg; //copy msg to buffer, not fragmented / segmented yet, but with message header - wlanheader->header.size = msgbuf_size; - wlanheader->header.type = GNUNET_MESSAGE_TYPE_WLAN_DATA; - wlanheader->target = *target; - wlanheader->crc = getcrc32(msgbuf, msgbuf_size); - memcpy(&wlanheader[1], msgbuf, msgbuf_size); + wlanheader->header.size = htons (msgbuf_size + sizeof (struct WlanHeader)); + wlanheader->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA); + memcpy (&(wlanheader->target), target, sizeof (struct GNUNET_PeerIdentity)); + memcpy (&(wlanheader->source), plugin->env->my_identity, + sizeof (struct GNUNET_PeerIdentity)); + wlanheader->crc = 0; + memcpy (&wlanheader[1], msgbuf, msgbuf_size); + wlanheader->crc = + htonl (getcrc32 + ((char *) wlanheader, msgbuf_size + sizeof (struct WlanHeader))); + //GNUNET_log_from(GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, "Wlan message Header crc: %u, %u\n",getcrc32((char*) wlanheader, msgbuf_size + sizeof(struct WlanHeader)), wlanheader->crc); + //hexdump(newmsg->msg, msgbuf_size + sizeof(struct WlanHeader)); + newmsg->transmit_cont = cont; newmsg->transmit_cont_cls = cont_cls; - newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout); - newmsg->message_pos = 0; - newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader); - newmsg->next = NULL; + newmsg->timeout = GNUNET_TIME_relative_to_absolute (timeout); + + newmsg->timeout.abs_value = newmsg->timeout.abs_value - 500; + + newmsg->message_size = msgbuf_size + sizeof (struct WlanHeader); - //check if queue is empty - struct PendingMessage * tailmsg; - tailmsg = session->pending_messages_tail; + GNUNET_CONTAINER_DLL_insert_tail (session->pending_message_head, + session->pending_message_tail, newmsg); - //new tail is the new msg - session->pending_messages_tail = newmsg; - newmsg->prev = tailmsg; +#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 free a mac endpoint + * @param plugin pointer to the plugin struct + * @param endpoint pointer to the MacEndpoint to free + */ +static void +free_macendpoint (struct Plugin *plugin, struct MacEndpoint *endpoint) +{ + struct Sessionqueue *sessions; + struct Sessionqueue *sessions_next; - //test if tail was not NULL (queue is empty) - if (tailmsg == NULL){ - // head should be NULL too - GNUNET_assert(session->pending_messages_head == NULL); + GNUNET_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); + endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK; + } + plugin->mac_count--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan mac endpoints"), + plugin->mac_count, GNUNET_NO); + GNUNET_free (endpoint); - session->pending_messages_head = newmsg; +} - } else { - //next at the tail should be NULL - GNUNET_assert(tailmsg->next == NULL); +/** + * function to free a session + * @param plugin pointer to the plugin + * @param queue pointer to the sessionqueue element to free + * @param free_macendpoint if GNUNET_YES and mac endpoint would be empty, free mac endpoint + */ +static void +free_session (struct Plugin *plugin, struct Sessionqueue *queue, + int do_free_macendpoint) +{ + struct Sessionqueue *pendingsession; + struct Sessionqueue *pendingsession_tmp; + struct PendingMessage *pm; + struct MacEndpoint *endpoint; + struct FragmentMessage *fm; + struct FragmentMessage *fmnext; + int check = 0; + + GNUNET_assert (plugin != NULL); + GNUNET_assert (queue != NULL); + GNUNET_assert (queue->content != NULL); + + //session found + //is this session pending for send + pendingsession = plugin->pending_Sessions_head; + while (pendingsession != NULL) + { + pendingsession_tmp = pendingsession; + pendingsession = pendingsession->next; + GNUNET_assert (pendingsession_tmp->content != NULL); + if (pendingsession_tmp->content == queue->content) + { + plugin->pendingsessions--; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending sessions"), + plugin->pendingsessions, GNUNET_NO); + GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head, + plugin->pending_Sessions_tail, + pendingsession_tmp); + GNUNET_free (pendingsession_tmp); + + GNUNET_assert (check == 0); + check = 1; + } + } - //queue the msg - tailmsg->next = newmsg; + endpoint = queue->content->mac; + fm = endpoint->sending_messages_head; + while (fm != NULL) + { + fmnext = fm->next; + if (fm->session == queue->content) + { + free_fragment_message (plugin, fm); + } + fm = fmnext; } - process_pending_messages(plugin); + // remove PendingMessage + pm = queue->content->pending_message_head; + while (pm != NULL) + { + GNUNET_CONTAINER_DLL_remove (queue->content->pending_message_head, + queue->content->pending_message_tail, pm); + GNUNET_free (pm->msg); + GNUNET_free (pm); + pm = queue->content->pending_message_head; + } + GNUNET_CONTAINER_DLL_remove (endpoint->sessions_head, endpoint->sessions_tail, + queue); + //Check that no ohter session on this endpoint for this session exits + GNUNET_assert (search_session (plugin, endpoint, &queue->content->target) == + NULL); + if (endpoint->sessions_head == NULL && do_free_macendpoint == GNUNET_YES) + { + free_macendpoint (plugin, endpoint); + //check if no endpoint with the same address exists + GNUNET_assert (get_macendpoint (plugin, &endpoint->addr, GNUNET_NO) == + NULL); + } - //FIXME not the correct size - return msgbuf_size; + if (queue->content->timeout_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (queue->content->timeout_task); + queue->content->timeout_task = GNUNET_SCHEDULER_NO_TASK; + } + GNUNET_free (queue); + check_fragment_queue (plugin); } - - /** * Function that can be used to force the plugin to disconnect * from the given peer and cancel all previous transmissions @@ -895,14 +2479,37 @@ wlan_plugin_send (void *cls, * @param target peer from which to disconnect */ static void -wlan_plugin_disconnect (void *cls, - const struct GNUNET_PeerIdentity *target) +wlan_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target) { - // struct Plugin *plugin = cls; - // FIXME make something usefull :-D + struct Plugin *plugin = cls; + struct Sessionqueue *queue; + struct Sessionqueue *queue_next; + struct MacEndpoint *endpoint = plugin->mac_head; + struct MacEndpoint *endpoint_next; + + // just look at all the session for the needed one + while (endpoint != NULL) + { + queue = endpoint->sessions_head; + endpoint_next = endpoint->next; + while (queue != NULL) + { + // content is never NULL + GNUNET_assert (queue->content != NULL); + queue_next = queue->next; + if (memcmp + (target, &(queue->content->target), + sizeof (struct GNUNET_PeerIdentity)) == 0) + { + free_session (plugin, queue, GNUNET_YES); + } + // try next + queue = queue_next; + } + endpoint = endpoint_next; + } } - /** * Convert the transports address to a nice, human-readable * format. @@ -918,224 +2525,730 @@ wlan_plugin_disconnect (void *cls, * @param asc_cls closure for asc */ static void -wlan_plugin_address_pretty_printer (void *cls, - const char *type, - const void *addr, - size_t addrlen, - int numeric, - struct GNUNET_TIME_Relative timeout, - GNUNET_TRANSPORT_AddressStringCallback - asc, void *asc_cls) +wlan_plugin_address_pretty_printer (void *cls, const char *type, + const void *addr, size_t addrlen, + int numeric, + struct GNUNET_TIME_Relative timeout, + GNUNET_TRANSPORT_AddressStringCallback asc, + void *asc_cls) { - char ret[92]; - const unsigned char * input; - - GNUNET_assert(cls !=NULL); - if (addrlen != 6) - { - /* invalid address (MAC addresses have 6 bytes) */ - GNUNET_break (0); - asc (asc_cls, NULL); - return; - } - input = (const unsigned char*) addr; - GNUNET_snprintf (ret, - sizeof (ret), - "%s Mac-Adress %X:%X:%X:%X:%X:%X", - PROTOCOL_PREFIX, - input[0], input[1], input[2], input[3], input[4], input[5]); + 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); } /** - * Another peer has suggested an address for this - * peer and transport plugin. Check that this could be a valid - * address. If so, consider adding it to the list - * of addresses. - * - * @param cls closure - * @param addr pointer to the address - * @param addrlen length of addr - * @return GNUNET_OK if this is a plausible address for this peer - * and transport + * handels the data after all fragments are put together + * @param cls macendpoint this messages belongs to + * @param hdr pointer to the data */ +static void +wlan_data_message_handler (void *cls, const struct GNUNET_MessageHeader *hdr) +{ + struct MacEndpoint *endpoint = (struct MacEndpoint *) cls; + struct Plugin *plugin = endpoint->plugin; + struct WlanHeader *wlanheader; + struct Session *session; + const struct GNUNET_MessageHeader *temp_hdr; + struct GNUNET_PeerIdentity tmpsource; + int crc; -static int -wlan_plugin_address_suggested (void *cls, - const void *addr, - size_t addrlen) -{ - /* struct Plugin *plugin = cls; */ + GNUNET_assert (plugin != NULL); - /* check if the address is plausible; if so, - add it to our list! */ + if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA) + { - GNUNET_assert(cls !=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 - //Mac Adress has 6 bytes - if (addrlen == 6){ - /* TODO check for bad addresses like milticast, broadcast, etc */ - return GNUNET_OK; - } else { - return GNUNET_SYSERR; - } + if (ntohs (hdr->size) < + sizeof (struct WlanHeader) + sizeof (struct GNUNET_MessageHeader)) + { + //packet not big enought + return; + } - return GNUNET_SYSERR; -} + GNUNET_STATISTICS_update (plugin->env->stats, + _("# wlan whole messages received"), 1, + GNUNET_NO); + wlanheader = (struct WlanHeader *) hdr; + session = search_session (plugin, endpoint, &wlanheader->source); -/** - * 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) -{ - char ret[92]; - const unsigned char * input; - - GNUNET_assert(cls !=NULL); - if (addrlen != 6) + temp_hdr = (const struct GNUNET_MessageHeader *) &wlanheader[1]; + crc = ntohl (wlanheader->crc); + wlanheader->crc = 0; + if (getcrc32 ((char *) wlanheader, ntohs (wlanheader->header.size)) != crc) { - /* invalid address (MAC addresses have 6 bytes) */ - GNUNET_break (0); - return NULL; + //wrong crc, dispose message + GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, + "Wlan message header crc was wrong: %u != %u\n", + getcrc32 ((char *) wlanheader, + ntohs (wlanheader->header.size)), crc); + hexdump ((void *) hdr, ntohs (hdr->size)); + return; + } + + //if not in session list + if (session == NULL) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "WLAN client not in session list: packet size = %u, inner size = %u, header size = %u\n", + ntohs (wlanheader->header.size), ntohs (temp_hdr->size), + sizeof (struct WlanHeader)); +#endif + //try if it is a hello message + if (ntohs (wlanheader->header.size) >= + ntohs (temp_hdr->size) + sizeof (struct WlanHeader)) + { + if (ntohs (temp_hdr->type) == GNUNET_MESSAGE_TYPE_HELLO) + { + if (GNUNET_HELLO_get_id + ((const struct GNUNET_HELLO_Message *) temp_hdr, + &tmpsource) == GNUNET_OK) + { + session = create_session (plugin, endpoint, &tmpsource); + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME, + "WLAN client not in session list and hello message is not okay\n"); + return; + } + + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME, + "WLAN client not in session list and not a hello message\n"); + return; + } + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME, + "WLAN client not in session list and message size in does not fit\npacket size = %u, inner size = %u, header size = %u\n", + ntohs (wlanheader->header.size), + ntohs (temp_hdr->size), sizeof (struct WlanHeader)); + return; + } + } + + //"receive" the message + + if (memcmp + (&wlanheader->source, &session->target, + sizeof (struct GNUNET_PeerIdentity)) != 0) + { + //wrong peer id +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "WLAN peer source id doesn't match packet peer source id: session %p\n", + session); +#endif + return; + } + + if (memcmp + (&wlanheader->target, plugin->env->my_identity, + sizeof (struct GNUNET_PeerIdentity)) != 0) + { + //wrong peer id +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "WLAN peer target id doesn't match our peer id: session %p\n", + session); +#endif + return; } - input = (const unsigned char*) addr; - GNUNET_snprintf (ret, - sizeof (ret), - "%s Mac-Adress %X:%X:%X:%X:%X:%X", - PROTOCOL_PREFIX, - input[0], input[1], input[2], input[3], input[4], input[5]); - return GNUNET_strdup (ret); -} + GNUNET_SERVER_mst_receive (plugin->data_tokenizer, session, + (const char *) temp_hdr, + ntohs (hdr->size) - sizeof (struct WlanHeader), + GNUNET_YES, GNUNET_NO); + return; + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME, + "wlan_data_message_handler got wrong message type: %u\n", + ntohs (hdr->size)); + return; + } +} /** - * Function used for to process the data from the suid process + * 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 doxigen +//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; + + struct GNUNET_ATS_Information distance; + + distance.type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE); + distance.value = htonl (1); + +#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 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 FIXME: give ATS for info + */ 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; - if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA){ - //TODO DATA - } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT){ - //TODO ADV - } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL){ - //TODO Control - if (hdr->size == 6){ - plugin->mac_address = GNUNET_malloc(6); - memcpy(plugin->mac_address, &hdr[1],6); - GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Notifying transport of address %s\n", wlan_plugin_address_to_string(cls, plugin->mac_address, hdr->size)); - plugin->env->notify_address (plugin->env->cls, - "wlan", - &plugin->mac_address, sizeof(plugin->mac_address), - GNUNET_TIME_UNIT_FOREVER_REL); - } else { - GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Wrong wlan mac address %s\n", plugin->mac_address); + struct FragmentMessage *fm; + struct FragmentMessage *fm2; + struct GNUNET_PeerIdentity tmpsource; + + GNUNET_assert (plugin != NULL); + + //ADVERTISEMENT + if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_HELLO) + { + + //TODO better DOS protection, error handling + //TODO test first than create session + GNUNET_assert (session_light != NULL); + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_HELLO size: %u; %s\n", + ntohs (hdr->size), wlan_plugin_address_to_string (NULL, + session_light->addr. + mac, 6)); +#endif + + if (session_light->macendpoint == NULL) + { + session_light->macendpoint = + get_macendpoint (plugin, &session_light->addr, GNUNET_YES); + } + + + if (GNUNET_HELLO_get_id + ((const struct GNUNET_HELLO_Message *) hdr, &tmpsource) == GNUNET_OK) + { + session_light->session = + search_session (plugin, session_light->macendpoint, &tmpsource); + if (session_light->session == NULL) + { + session_light->session = + create_session (plugin, session_light->macendpoint, &tmpsource); + } + GNUNET_STATISTICS_update (plugin->env->stats, + _("# wlan hello messages received"), 1, + GNUNET_NO); + plugin->env->receive (plugin->env->cls, &session_light->session->target, + hdr, NULL, 0, session_light->session, + (const char *) &session_light->session->mac->addr, + sizeof (session_light->session->mac->addr)); + } + else + { + GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, PLUGIN_LOG_NAME, + "WLAN client not in session list and hello message is not okay\n"); + return; + } + } + + //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); + + if (ret == GNUNET_NO) + { + session_light->macendpoint->dups++; + } + else if (ret == GNUNET_OK) + { + session_light->macendpoint->fragc++; + } + set_next_send (plugin); + + } + + //ACK + + else if (ntohs (hdr->type) == GNUNET_MESSAGE_TYPE_FRAGMENT_ACK) + { + GNUNET_assert (session_light != NULL); + if (session_light->macendpoint == NULL) + { + session_light->macendpoint = + get_macendpoint (plugin, &session_light->addr, GNUNET_NO); + } + + if (session_light->macendpoint == NULL) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Macendpoint does not exist for this GNUNET_MESSAGE_TYPE_FRAGMENT_ACK size: %u; %s\n", + ntohs (hdr->size), wlan_plugin_address_to_string (NULL, + session_light->addr.mac, + 6)); +#endif + return; + } + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_FRAGMENT_ACK size: %u; mac endpoint: %p; %s\n", + ntohs (hdr->size), session_light->macendpoint, + wlan_plugin_address_to_string (NULL, + session_light->addr.mac, + 6)); +#endif + fm = session_light->macendpoint->sending_messages_head; + while (fm != NULL) + { + fm2 = fm->next; + GNUNET_STATISTICS_update (plugin->env->stats, _("# wlan acks received"), + 1, GNUNET_NO); + int ret = GNUNET_FRAGMENT_process_ack (fm->fragcontext, hdr); + + if (ret == GNUNET_OK) + { +#if DEBUG_wlan_retransmission > 1 + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Got last ack, finished fragment message %p\n", fm); +#endif + session_light->macendpoint->acks++; + fm->session->last_activity = GNUNET_TIME_absolute_get (); + session_light->macendpoint->last_activity = fm->session->last_activity; + free_fragment_message (plugin, fm); + check_fragment_queue (plugin); + return; + } + if (ret == GNUNET_NO) + { +#if DEBUG_wlan_retransmission > 1 + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Got ack for: %p\n", fm); +#endif + session_light->macendpoint->acks++; + return; + } + if (ret == GNUNET_SYSERR) + { + + } + + fm = fm2; } +#if DEBUG_wlan_retransmission > 1 + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "WLAN fragment not in fragment list\n"); +#endif + return; - } else { + } + else + { // TODO Wrong data? + GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, PLUGIN_LOG_NAME, + "WLAN packet inside the WLAN helper packet has not the right type: %u size: %u\n", + ntohs (hdr->type), ntohs (hdr->size)); + GNUNET_break (0); + return; } + +#if 0 + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Helper finished\n"); +#endif + } +/** + * Function to print mac addresses nice * + * @param pointer to 6 byte with the mac address + * @return pointer to the chars which hold the print out + */ +const char * +macprinter (const u_int8_t * mac) +{ + static char macstr[20]; + + GNUNET_snprintf (macstr, sizeof (macstr), "%X:%X:%X:%X:%X:%X", mac[0], mac[1], + mac[2], mac[3], mac[4], mac[5]); + return macstr; +} +/** + * Function for the scheduler if a mac endpoint times out + * @param cls pointer to the MacEndpoint + * @param tc pointer to the GNUNET_SCHEDULER_TaskContext + */ static void -wlan_plugin_helper_read (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) +macendpoint_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { - struct Plugin *plugin = cls; - char mybuf[WLAN_MTU]; - ssize_t bytes; + struct MacEndpoint *endpoint = cls; + GNUNET_assert (endpoint != NULL); + endpoint->timeout_task = GNUNET_SCHEDULER_NO_TASK; if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) + { return; - bytes = GNUNET_DISK_file_read (plugin->server_stdout_handle, - mybuf, sizeof(mybuf)); - if (bytes <= 0) - { -#if DEBUG_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - _("Finished reading from wlan-helper stdout with code: %d\n"), bytes); -#endif - return; - } - GNUNET_SERVER_mst_receive(plugin->consoltoken, NULL, - mybuf, bytes, 0, GNUNET_NO); - + } + if (GNUNET_TIME_absolute_get_remaining + (GNUNET_TIME_absolute_add + (endpoint->last_activity, MACENDPOINT_TIMEOUT)).rel_value == 0) + { + GNUNET_assert (endpoint->plugin != NULL); + GNUNET_STATISTICS_update (endpoint->plugin->env->stats, + _("# wlan mac endpoints timeouts"), 1, GNUNET_NO); + free_macendpoint (endpoint->plugin, endpoint); + } + else + { + endpoint->timeout_task = + GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout, + endpoint); + } } +/** + * function to create an macendpoint + * @param plugin pointer to the plugin struct + * @param addr pointer to the macaddress + * @return returns a macendpoint + */ +static struct MacEndpoint * +create_macendpoint (struct Plugin *plugin, const struct MacAddress *addr) +{ + struct MacEndpoint *newend = GNUNET_malloc (sizeof (struct MacEndpoint)); + + GNUNET_assert (plugin != NULL); + GNUNET_STATISTICS_update (plugin->env->stats, + _("# wlan mac endpoints created"), 1, GNUNET_NO); + newend->addr = *addr; + newend->plugin = plugin; + newend->addr = *addr; + newend->fragment_messages_out_count = 0; + newend->defrag = + GNUNET_DEFRAGMENT_context_create (plugin->env->stats, WLAN_MTU, + MESSAGES_IN_DEFRAG_QUEUE_PER_MAC, + newend, &wlan_data_message_handler, + &add_ack_for_send); + newend->last_activity = GNUNET_TIME_absolute_get (); + newend->timeout_task = + GNUNET_SCHEDULER_add_delayed (MACENDPOINT_TIMEOUT, &macendpoint_timeout, + newend); + + plugin->mac_count++; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan mac endpoints"), + plugin->mac_count, GNUNET_NO); + GNUNET_CONTAINER_DLL_insert_tail (plugin->mac_head, plugin->mac_tail, newend); +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "New Mac Endpoint %p: %s\n", newend, + wlan_plugin_address_to_string (NULL, newend->addr.mac, 6)); +#endif + return newend; +} /** - * Start the gnunet-wlan-helper process. - * - * @param plugin the transport plugin + * Function used for to process the data from the suid process * - * @return GNUNET_YES if process was started, GNUNET_SYSERR on error + * @param cls the plugin handle + * @param client client that send the data (not used) + * @param hdr header of the GNUNET_MessageHeader */ -static int -wlan_transport_start_wlan_helper (struct Plugin *plugin) +static void +wlan_process_helper (void *cls, void *client, + const struct GNUNET_MessageHeader *hdr) { + struct Plugin *plugin = cls; + struct ieee80211_frame *wlanIeeeHeader = NULL; + struct Session_light *session_light = NULL; + struct Radiotap_rx *rxinfo; + const struct GNUNET_MessageHeader *temp_hdr = NULL; + + int datasize = 0; + int pos; + + GNUNET_assert (plugin != NULL); + switch (ntohs (hdr->type)) + { + case GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA: +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_process_helper got GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA size: %u\n", + ntohs (hdr->size)); +#endif - plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_NO, GNUNET_YES); - if (plugin->server_stdout == NULL) - return GNUNET_SYSERR; + GNUNET_STATISTICS_update (plugin->env->stats, + _("# wlan WLAN_HELPER_DATA received"), 1, + GNUNET_NO); + //call wlan_process_helper with the message inside, later with wlan: analyze signal + if (ntohs (hdr->size) < + sizeof (struct ieee80211_frame) + + 2 * sizeof (struct GNUNET_MessageHeader) + sizeof (struct Radiotap_rx)) + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Size of packet is too small; size: %u min size: %u\n", + ntohs (hdr->size), + sizeof (struct ieee80211_frame) + + sizeof (struct GNUNET_MessageHeader)); +#endif + //GNUNET_break (0); + /* FIXME: restart SUID process */ + return; + } - plugin->server_stdin = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO); - if (plugin->server_stdin == NULL) - return GNUNET_SYSERR; + rxinfo = (struct Radiotap_rx *) &hdr[1]; + wlanIeeeHeader = (struct ieee80211_frame *) &rxinfo[1]; + + //process only if it is an broadcast or for this computer both with the gnunet bssid -#if DEBUG_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Starting gnunet-wlan-helper process cmd: %s %s\n", "gnunet-wlan-helper", plugin->interface); + //check for bssid + if (memcmp + (&(wlanIeeeHeader->i_addr3), &mac_bssid, + sizeof (struct MacAddress)) == 0) + { + //check for broadcast or mac + if ((memcmp + (&(wlanIeeeHeader->i_addr1), &bc_all_mac, + sizeof (struct MacAddress)) == 0) || + (memcmp + (&(wlanIeeeHeader->i_addr1), &(plugin->mac_address), + sizeof (struct MacAddress)) == 0)) + { + //if packet is from us return + if ((memcmp + (&(wlanIeeeHeader->i_addr2), &(plugin->mac_address), + sizeof (struct MacAddress)) == 0)) + { + return; + } + // process the inner data + + + datasize = + ntohs (hdr->size) - sizeof (struct ieee80211_frame) - + sizeof (struct GNUNET_MessageHeader) - sizeof (struct Radiotap_rx); + + session_light = GNUNET_malloc (sizeof (struct Session_light)); + memcpy (&session_light->addr, &(wlanIeeeHeader->i_addr2), + sizeof (struct MacAddress)); + //session_light->session = search_session(plugin,session_light->addr); + GNUNET_STATISTICS_update (plugin->env->stats, + _("# wlan messages 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 messages inside WLAN_HELPER_DATA received"), + 1, GNUNET_NO); + wlan_data_helper (plugin, session_light, temp_hdr, rxinfo); + } + else + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Size of packet is too small; size: %u > size of packet: %u\n", + ntohs (temp_hdr->size), datasize + pos); #endif - /* Start the server process */ - plugin->server_pid = GNUNET_OS_start_process(plugin->server_stdin, plugin->server_stdout, "gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", plugin->interface, NULL); - if (plugin->server_pid == GNUNET_SYSERR) + } + pos += ntohs (temp_hdr->size); + + } + + //clean up + GNUNET_free (session_light); + } + else + { +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_process_helper got wrong MAC: %s\n", + macprinter (wlanIeeeHeader->i_addr1)); +#endif + } + } + else { -#if DEBUG_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Failed to start gnunet-wlan-helper process\n"); +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_process_helper got wrong BSSID: %s\n", + macprinter (wlanIeeeHeader->i_addr2)); #endif - return GNUNET_SYSERR; } - /* Close the write end of the read pipe */ - GNUNET_DISK_pipe_close_end(plugin->server_stdout, GNUNET_DISK_PIPE_END_WRITE); + break; + case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL: + //TODO more control messages + if (ntohs (hdr->size) != sizeof (struct Wlan_Helper_Control_Message)) + { + GNUNET_break (0); + /* FIXME: restart SUID process */ + return; + } + memcpy (&plugin->mac_address, &hdr[1], sizeof (struct MacAddress)); +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Received WLAN_HELPER_CONTROL message with transport of address %s\n", + wlan_plugin_address_to_string (cls, &plugin->mac_address, + sizeof (struct + MacAddress))); +#endif + plugin->env->notify_address (plugin->env->cls, GNUNET_YES, + &plugin->mac_address, + sizeof (struct MacAddress)); + break; + default: +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "Func wlan_process_helper got unknown message with number %u, size %u\n", + ntohs (hdr->type), ntohs (hdr->size)); - /* Close the read end of the write pipe */ - GNUNET_DISK_pipe_close_end(plugin->server_stdin, GNUNET_DISK_PIPE_END_READ); +#endif +#if DEBUG_wlan_msg_dump > 1 + hexdump (hdr, GNUNET_MIN (ntohs (hdr->size), 256)); +#endif + GNUNET_break (0); + return; + } +} - plugin->server_stdout_handle = GNUNET_DISK_pipe_handle(plugin->server_stdout, GNUNET_DISK_PIPE_END_READ); - plugin->server_stdin_handle = GNUNET_DISK_pipe_handle(plugin->server_stdin, GNUNET_DISK_PIPE_END_WRITE); +/** + * Exit point from the plugin. + * @param cls pointer to the api struct + */ - plugin->server_read_task = - GNUNET_SCHEDULER_add_read_file (plugin->env->sched, - GNUNET_TIME_UNIT_FOREVER_REL, - plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin); - return GNUNET_YES; -} +//FIXME cleanup +void * +libgnunet_plugin_transport_wlan_done (void *cls) +{ + struct GNUNET_TRANSPORT_PluginFunctions *api = cls; + struct Plugin *plugin = api->cls; + struct MacEndpoint *endpoint = plugin->mac_head; + struct MacEndpoint *endpoint_next; + +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "libgnunet_plugin_transport_wlan_done started\n"); +#endif + + wlan_transport_stop_wlan_helper (plugin); + GNUNET_assert (cls != NULL); + //free sessions + while (endpoint != NULL) + { + endpoint_next = endpoint->next; + free_macendpoint (plugin, endpoint); + endpoint = endpoint_next; + } + + + if (plugin->suid_tokenizer != NULL) + GNUNET_SERVER_mst_destroy (plugin->suid_tokenizer); + + if (plugin->data_tokenizer != NULL) + GNUNET_SERVER_mst_destroy (plugin->data_tokenizer); + + GNUNET_free_non_null (plugin->interface); + GNUNET_free (plugin); + GNUNET_free (api); + return NULL; +} /** * Entry point for the plugin. @@ -1144,31 +3257,37 @@ wlan_transport_start_wlan_helper (struct Plugin *plugin) * @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error */ void * -gnunet_plugin_transport_wlan_init (void *cls) +libgnunet_plugin_transport_wlan_init (void *cls) { - struct GNUNET_SERVICE_Context *service; + //struct GNUNET_SERVICE_Context *service; struct GNUNET_TRANSPORT_PluginEnvironment *env = cls; struct GNUNET_TRANSPORT_PluginFunctions *api; struct Plugin *plugin; - GNUNET_assert(cls !=NULL); - - service = GNUNET_SERVICE_start ("transport-wlan", env->sched, env->cfg); - if (service == NULL){ - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - _("Failed to start service for `%s' transport plugin.\n"), - "wlan"); - return NULL; - } + GNUNET_assert (cls != NULL); plugin = GNUNET_malloc (sizeof (struct Plugin)); plugin->env = env; - - wlan_transport_start_wlan_helper(plugin); - plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin); - - //plugin->all_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue)); - //plugin->pending_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue)); + plugin->pendingsessions = 0; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan pending sessions"), + plugin->pendingsessions, GNUNET_NO); + plugin->mac_count = 0; + GNUNET_STATISTICS_set (plugin->env->stats, _("# wlan mac endpoints"), + plugin->mac_count, GNUNET_NO); + plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; + plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK; + plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK; + GNUNET_BANDWIDTH_tracker_init (&plugin->tracker, + GNUNET_BANDWIDTH_value_init (100 * 1024 * + 1024 / 8), 100); + + 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_head = GNUNET_malloc (sizeof (struct Sessionqueue)); api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions)); api->cls = plugin; @@ -1178,28 +3297,37 @@ gnunet_plugin_transport_wlan_init (void *cls) api->check_address = &wlan_plugin_address_suggested; api->address_to_string = &wlan_plugin_address_to_string; - start_next_message_id(); - - return api; -} + //read config + if (GNUNET_CONFIGURATION_have_value (env->cfg, "transport-wlan", "TESTMODE")) + { + if (GNUNET_SYSERR == + GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-wlan", + "TESTMODE", &(plugin->testmode))) + plugin->testmode = 0; //default value + } -/** - * Exit point from the plugin. - */ -//TODO doxigen -void * -gnunet_plugin_transport_wlan_done (void *cls) -{ - struct GNUNET_TRANSPORT_PluginFunctions *api = cls; - struct Plugin *plugin = api->cls; + if (GNUNET_CONFIGURATION_have_value (env->cfg, "transport-wlan", "INTERFACE")) + { + if (GNUNET_CONFIGURATION_get_value_string + (env->cfg, "transport-wlan", "INTERFACE", + &(plugin->interface)) != GNUNET_YES) + { + libgnunet_plugin_transport_wlan_done (api); + return NULL; + } + } - GNUNET_assert(cls !=NULL); + //start the plugin + wlan_transport_start_wlan_helper (plugin); + set_next_beacon_time (plugin); + set_next_send (plugin); +#if DEBUG_wlan + GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, PLUGIN_LOG_NAME, + "wlan init finished\n"); +#endif - GNUNET_free_non_null(plugin->mac_address); - GNUNET_free (plugin); - GNUNET_free (api); - return NULL; + return api; } /* end of plugin_transport_wlan.c */