X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Ftransport%2Fplugin_transport_wlan.c;h=51c6d3053d8cd499715711c44d3f2a519651bd4f;hb=ecc8c4da9b35b704b62ff0dc905dcd0a61f1886a;hp=4b83db3e95ee041b6e1e4ef29eb130d176b8a579;hpb=3db08333ec2b301cc8f204ad74f5aa8a25e3426f;p=oweals%2Fgnunet.git diff --git a/src/transport/plugin_transport_wlan.c b/src/transport/plugin_transport_wlan.c index 4b83db3e9..51c6d3053 100644 --- a/src/transport/plugin_transport_wlan.c +++ b/src/transport/plugin_transport_wlan.c @@ -1,22 +1,22 @@ /* - This file is part of GNUnet - (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors) - - GNUnet is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GNUnet is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GNUnet; see the file COPYING. If not, write to the - Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. -*/ + This file is part of GNUnet + (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors) + + GNUnet is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3, or (at your + option) any later version. + + GNUnet is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GNUnet; see the file COPYING. If not, write to the + Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. + */ /** * @file transport/plugin_transport_wlan.c @@ -34,24 +34,66 @@ #include "plugin_transport_wlan.h" #include "gnunet_common.h" #include "gnunet_crypto_lib.h" +#include "gnunet_fragmentation_lib.h" +//#include "wlan/ieee80211.h" +//#include + +#include #define PROTOCOL_PREFIX "wlan" /** * Max size of packet from helper */ -#define WLAN_MTU 3000 +#define WLAN_MTU 1450 /** * Time until retransmission of a fragment in ms */ +#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS -#define FRAGMENT_TIMEOUT 1000 - +/** + * max size of fragment queue + */ #define FRAGMENT_QUEUE_SIZE 10 +/** + * max messages in fragment queue per session/client + */ +#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_SESSION 1 + +/** + * max messages in fragment queue per MAC + */ +#define FRAGMENT_QUEUE_MESSAGES_OUT_PER_MACENDPOINT 1 + +/** + * time until message in in queue + */ +#define MESSAGE_IN_TIMEOUT GNUNET_TIME_UNIT_SECONDS + +/** + * 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 +/** + * scaling factor for hello beacon + */ +#define HALLO_BEACON_SCALING_FACTOR 900 #define DEBUG_wlan GNUNET_NO +#define DEBUG_wlan_retransmission GNUNET_NO +#define DEBUG_wlan_ip_udp_packets_on_air GNUNET_NO +#define MESSAGE_LENGHT_UNKNOWN -1 +//#define NO_MESSAGE_OR_MESSAGE_FINISHED -2 +/** + * size of log for recently used incomming messages id + */ +#define MESSAGE_ID_BACKLOG_SIZE 5 /** * After how long do we expire an address that we * learned from another peer if it is not reconfirmed @@ -59,6 +101,69 @@ */ #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6) +#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]; +#if DEBUG_wlan_ip_udp_packets_on_air +u_int8_t llc[4]; +struct iph ip; +struct udphdr udp; +#endif +}GNUNET_PACKED; /** * Initial handshake message for a session. */ @@ -70,7 +175,7 @@ struct WelcomeMessage struct GNUNET_MessageHeader header; /** - * Identity of the node connecting (TCP client) + * Identit*mac_y of the node connecting (TCP client) */ struct GNUNET_PeerIdentity clientIdentity; @@ -87,21 +192,29 @@ struct Plugin struct GNUNET_TRANSPORT_PluginEnvironment *env; /** - * List of open sessions. head + * List of open connections. head */ - struct Sessionqueue *sessions; + struct MacEndpoint * mac_head; /** - * List of open sessions. tail + * List of open connections. tail */ - struct Sessionqueue *sessions_tail; + struct MacEndpoint * mac_tail; /** - * 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 @@ -124,17 +237,22 @@ 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 */ struct GNUNET_OS_Process *server_proc; @@ -146,61 +264,119 @@ struct Plugin /** * The mac_address of the wlan card given to us by the helper. */ - char *mac_address; + struct MacAddress mac_address; /** * Sessions currently pending for transmission - * to this peer, if any. + * to a peer, if any. */ - struct Sessionqueue * pending_Sessions; + struct Sessionqueue * pending_Sessions_head; /** - * Sessions currently pending for transmission - * to this peer (tail), if any. - */ + * Sessions currently pending for transmission + * to a peer (tail), if any. + */ struct Sessionqueue * pending_Sessions_tail; /** * number of pending sessions */ - uint pendingsessions; + unsigned int pendingsessions; /** - * Messages in the fragmentation queue, head + * Messages in the sending queues */ + int pending_Fragment_Messages; - struct FragmentMessage * pending_Fragment_Messages_head; + /** + * messages ready for send, head + */ + struct FragmentMessage_queue * sending_messages_head; + /** + * messages ready for send, tail + */ + struct FragmentMessage_queue * sending_messages_tail; + /** + * time of the next "hello-beacon" + */ + struct GNUNET_TIME_Absolute beacon_time; /** - * Messages in the fragmentation queue, tail + * queue to send acks for received fragments (head) */ + struct AckSendQueue * ack_send_queue_head; - struct FragmentMessage * pending_Fragment_Messages_tail; + /** + * queue to send acks for received fragments (tail) + */ + struct AckSendQueue * ack_send_queue_tail; /** - * number of pending fragment message - */ + * Tracker for bandwidth limit + */ + struct GNUNET_BANDWIDTH_Tracker tracker; +}; - uint pending_fragment_messages; +/** + * Struct to store data if file write did not accept the whole packet + */ +struct Finish_send +{ + struct Plugin * plugin; + char * msgheader; + struct GNUNET_MessageHeader * msgstart; + 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; }; -//TODO doxigen +/** + * 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; +}; -struct Sessionqueue +/** + * Queue for the fragments received + */ +//TODO DOXIGEN +struct Receive_Fragment_Queue { - struct Sessionqueue * next; - struct Sessionqueue * prev; - struct Session * content; + 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 +//TODO DOXIGEN +struct MacEndpoint_id_fragment_triple +{ + struct MacEndpoint * endpoint; + uint32_t message_id; + struct FragmentMessage * fm; +}; -struct AckQueue +//TODO DOXIGEN +struct Plugin_Session_pair { - struct AckQueue * next; - struct AckQueue * prev; - int fragment_num; + struct Plugin * plugin; + struct Session * session; }; /** @@ -209,11 +385,24 @@ struct AckQueue */ struct PendingMessage { + /** + * dll next + */ + struct PendingMessage * next; + /** + * dll prev + */ + struct PendingMessage * prev; /** * The pending message */ - char *msg; + struct WlanHeader *msg; + + /** + * Size of the message + */ + size_t message_size; /** * Continuation function to call once the message @@ -232,11 +421,64 @@ struct PendingMessage */ struct GNUNET_TIME_Absolute timeout; +}; + +/** + * Queue for acks to send for fragments recived + */ +struct AckSendQueue +{ + /** - * Size of the message + * next ack in the ack send queue */ - size_t message_size; + struct AckSendQueue * next; + /** + * previous ack in the ack send queue + */ + struct AckSendQueue * prev; + /** + * pointer to the session this ack belongs to + */ + struct MacEndpoint * endpoint; + /** + * ID of message, to distinguish between the messages, picked randomly. + */ + uint32_t message_id; + + /** + * msg to send + */ + struct GNUNET_MessageHeader * hdr; + /** + * pointer to the ieee wlan header + */ + struct ieee80211_frame * ieeewlanheader; + /** + * pointer to the radiotap header + */ + struct Radiotap_Send * radioHeader; +}; +/** + * Session infos gathered from a messages + */ + +struct Session_light +{ + /** + * the session this message belongs to + */ + struct Session * session; + /** + * peer mac address + */ + struct MacAddress addr; + + /** + * mac endpoint + */ + struct MacEndpoint * macendpoint; }; /** @@ -251,15 +493,16 @@ struct Session struct SessionHeader header; /** - * Pointer to the global plugin struct. + * Message currently pending for transmission + * to this peer, if any. head */ - struct Plugin *plugin; + struct PendingMessage * pending_message_head; /** * Message currently pending for transmission - * to this peer, if any. + * to this peer, if any. tail */ - struct PendingMessage *pending_message; + struct PendingMessage * pending_message_tail; /** * To whom are we talking to (set to our identity @@ -267,16 +510,6 @@ struct Session */ struct GNUNET_PeerIdentity target; - /** - * encapsulation of the data - */ - //struct GNUNET_SERVER_MessageStreamTokenizer * datatoken; - - /** - * peer mac address - */ - char addr[6]; - /** * Address of the other peer (either based on our 'connect' * call or on our 'accept' call). @@ -290,638 +523,706 @@ struct Session struct GNUNET_TIME_Absolute last_activity; /** - * current number for message incoming, to distinguish between the messages - */ - uint32_t message_id_in; - - /** - * current number for message outgoing, to distinguish between the messages + * peer connection */ - uint32_t message_id_out; + struct MacEndpoint * mac; /** - * does this session have a message in the fragment queue + * count of messages in the fragment out queue for this session */ - int has_fragment; + int fragment_messages_out_count; }; - - - -struct FragmentMessage +/** + * Struct to represent one network card connection + */ +struct MacEndpoint { - /** - * Session this message belongs to - */ - - struct Session *session; - - /** - * This is a doubly-linked list. - */ - struct FragmentMessage *next; - - /** - * This is a doubly-linked list. - */ - struct FragmentMessage *prev; - - /** - * The pending message - */ - char *msg; - - /** - * Timeout value for the pending message. - */ - struct GNUNET_TIME_Absolute timeout; - - /** - * Timeout value for the pending fragments. - * Stores the time when the next msg fragment ack has to be received - */ - struct GNUNET_TIME_Absolute next_ack; - - /** - * Sorted queue with the acks received for fragments; head - */ - - struct AckQueue * head; - - /** - * Sorted queue with the acks received for fragments; tail - */ + /** + * 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 AckQueue * tail; + /** + * Messages currently sending + * to a peer (tail), if any. + */ + struct FragmentMessage * sending_messages_tail; + /** + * dll next + */ + struct MacEndpoint *next; + /** + * dll prev + */ + struct MacEndpoint *prev; - /** - * Size of the message - */ - size_t message_size; + /** + * 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 - */ - uint32_t message_pos; + /** + * Defrag context for this mac endpoint + */ + struct GNUNET_DEFRAGMENT_Context * defrag; -}; + /** + * count of messages in the fragment out queue for this mac endpoint + */ -/** - * Header for messages which need fragmentation - */ -struct WlanHeader -{ + int fragment_messages_out_count; - struct GNUNET_MessageHeader header; + //TODO DOXIGEN + uint8_t rate; + uint16_t tx_power; + uint8_t antenna; /** - * checksum/error correction + * Duplicates received */ - uint32_t crc GNUNET_PACKED; + int dups; /** - * To whom are we talking to (set to our identity - * if we are still waiting for the welcome message) + * Fragments received */ - struct GNUNET_PeerIdentity target; - - // followed by payload + int fragc; + /** + * Acks received + */ + int acks; }; /** - * Header for messages which need fragmentation + * Struct for Messages in the fragment queue */ -struct FragmentationHeader -{ - struct GNUNET_MessageHeader header; +struct FragmentMessage +{ /** - * To whom are we talking to (set to our identity - * if we are still waiting for the welcome message) + * Session this message belongs to */ - // struct GNUNET_PeerIdentity target GNUNET_PACKED; + + struct Session *session; /** - * ID of message, to distinguish between the messages, picked randomly. + * This is a doubly-linked list. */ - uint32_t message_id GNUNET_PACKED; + struct FragmentMessage *next; /** - * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD) + * This is a doubly-linked list. */ - uint16_t fragment_off_or_num GNUNET_PACKED; + struct FragmentMessage *prev; /** - * CRC of fragment (for error checking) + * Timeout value for the pending message. */ - uint16_t message_crc GNUNET_PACKED; + struct GNUNET_TIME_Absolute timeout; /** - * Flags - * // 0x1 ack => Use two different message types in header.type! (FRAG_MESSAGE; FRAG_ACK) - * // 0x2 has data (not only ack) - * // 0x4 last fragment of message - * // 0x8 new message + * Fragmentation context */ - // uint32_t flags GNUNET_PACKED; + struct GNUNET_FRAGMENT_Context * fragcontext; /** - * checksum/error correction + * Fragment to send */ - // uint32_t crc GNUNET_PACKED; + char * frag; - // followed by payload unless ACK + /** + * size of message + */ + size_t size; + /** + * pointer to the ieee wlan header + */ + struct ieee80211_frame * ieeewlanheader; + /** + * pointer to the radiotap header + */ + struct Radiotap_Send * radioHeader; }; -//enum { ACK_FRAGMENT = 1, DATA_FRAGMENT = 2, LAST_FRAGMENT = 4, NEW_MESSAGE = 8 }; - -int getRadiotapHeader (struct RadiotapHeader * Header); -int getWlanHeader (struct IeeeHeader * Header); -static int wlan_plugin_address_suggested (void *cls, - const void *addr, - size_t addrlen); -uint16_t getcrc16 (const char *msgbuf, size_t msgbuf_size); -static void do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); -static void check_fragment_queue (struct Plugin * plugin); +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); /** - * get the next message number, at the moment just a random one + * Generates a nice hexdump of a memory area. * + * \param mem pointer to memory to dump + * \param length how many bytes to dump */ -//TODO doxigen -uint32_t -get_next_message_id() +void +hexdump(void *mem, unsigned length) { - return GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX); + char line[80]; + char *src = (char*) mem; + + printf( + "dumping %u bytes from %p\r\n" + " 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF\r\n", + length, src); + unsigned i; + int j; + + for (i = 0; i < length; i += 16, src += 16) + { + char *t = line; + + t += sprintf(t, "%04x: ", i); + for (j = 0; j < 16; j++) + { + if (i + j < length) + t += sprintf(t, "%02X", src[j] & 0xff); + else + t += sprintf(t, " "); + t += sprintf(t, j % 2 ? " " : "-"); + } + + t += sprintf(t, " "); + for (j = 0; j < 16; j++) + { + if (i + j < length) + { + if (isprint((unsigned char)src[j])) + t += sprintf(t, "%c", src[j]); + else + t += sprintf(t, "."); + } + else + { + t += sprintf(t, " "); + } + } + + t += sprintf(t, "\r\n"); + printf("%s", line); + } } /** - * start next message number generator + * Function to find a MacEndpoint with a specific mac addr + * @param plugin pointer to the plugin struct + * @param addr pointer to the mac address + * @param create_new GNUNET_YES if a new end point should be created + * @return */ -//TODO doxigen -void -start_next_message_id() +static struct MacEndpoint * +get_macendpoint(struct Plugin *plugin, const struct MacAddress *addr, + int create_new) { - //GNUNET_CRYPTO_random_init; -} + struct MacEndpoint * queue = plugin->mac_head; + while (queue != NULL) + { + GNUNET_assert (queue->sessions_head != NULL); + if (memcmp(addr, &queue->addr, sizeof(struct MacAddress)) == 0) + return queue; /* session found */ + queue = queue->next; + } + if (create_new == GNUNET_YES) + { + return create_macendpoint(plugin, addr); + } + else + { + return NULL; + } +} /** - * get Session from address + * search for a session with the addr and peer id * + * @param plugin pointer to the plugin struct + * @param addr pointer to the mac address of the peer + * @param peer pointer to the peerid + * @return returns the session */ -//TODO doxigen -//TODO add other possibilities to find the right session (are there other?) static struct Session * -get_Session (struct Plugin *plugin, - const char * addr) +search_session(struct Plugin *plugin, const struct MacEndpoint * endpoint, + const struct GNUNET_PeerIdentity * peer) { - struct Sessionqueue * queue = plugin->sessions; - struct Sessionqueue * lastitem = NULL; - - - //just look at all the session for the needed one - while (queue != NULL){ - // content is never NULL - GNUNET_assert (queue->content == NULL); - char * addr2 = queue->content->addr; - if (memcmp(addr, addr2, 6) == 0) - { - //sesion found - return queue->content; - } - // try next - lastitem = queue; - queue = queue->next; - } - // new session - queue = GNUNET_malloc (sizeof (struct Sessionqueue)); - - GNUNET_CONTAINER_DLL_insert(plugin->sessions, plugin->sessions_tail, queue); - - queue->content = GNUNET_malloc (sizeof (struct Session)); - queue->content->plugin = plugin; - memcpy(queue->content->addr, addr, 6); - queue->content->message_id_out = get_next_message_id(); - queue->content->has_fragment = 0; - - //queue welcome message for new sessions, not realy needed - //struct WelcomeMessage welcome; - struct PendingMessage *pm; - pm = GNUNET_malloc (sizeof (struct PendingMessage)); - pm->msg = GNUNET_malloc(GNUNET_HELLO_size(* (plugin->env->our_hello))); - pm->message_size = GNUNET_HELLO_size(* (plugin->env->our_hello)); - //welcome.header.size = htons (GNUNET_HELLO_size(* (plugin->env->our_hello))); - //welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT); - //welcome.clientIdentity = *plugin->env->my_identity; - memcpy ( (pm->msg), * plugin->env->our_hello, GNUNET_HELLO_size(* (plugin->env->our_hello))); - pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS; - queue->content->pending_message = pm; - plugin->pendingsessions ++; - GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions, plugin->pending_Sessions_tail, queue); - - check_fragment_queue(plugin); - - return queue->content; + 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; } /** - * Queue the session to send data + * 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 */ -//TODO doxigen -static void -queue_Session (struct Plugin *plugin, - struct Session * session) +static const char* +wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen) { - struct Sessionqueue * queue = plugin->pending_Sessions; - struct Sessionqueue * lastitem = NULL; - - while (queue != NULL){ - // content is never NULL - GNUNET_assert (queue->content == NULL); - // is session already in queue? - if (session == queue->content){ - return; - } - // try next - lastitem = queue; - queue = queue->next; - } - - // Session is not in the queue - - queue = GNUNET_malloc (sizeof (struct Sessionqueue)); - queue->content = session; - - //insert at the tail - GNUNET_CONTAINER_DLL_insert_after (plugin->pending_Sessions, - plugin->pending_Sessions_tail, - plugin->pending_Sessions_tail, queue); - plugin->pendingsessions ++; + 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; } -//TODO doxigen -static void -free_acks (struct FragmentMessage * pm){ - struct AckQueue * fq; - while (pm->head != NULL){ - fq = pm->head; - GNUNET_CONTAINER_DLL_remove(pm->head, pm->tail, fq); - GNUNET_free(fq); - } -} +/** + * create a new session + * + * @param plugin pointer to the plugin struct + * @param addr pointer to the mac endpoint of the peer + * @return returns the session + */ -//TODO doxigen -static void -delay_fragment_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc){ - struct Plugin * plugin = cls; - plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; - - if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) - return; - - // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg - plugin->server_write_task - = GNUNET_SCHEDULER_add_write_file(GNUNET_TIME_UNIT_FOREVER_REL, - plugin->server_stdin_handle, - &do_transmit, - plugin); -} +static struct Session * +create_session(struct Plugin *plugin, struct MacEndpoint * endpoint, + const struct GNUNET_PeerIdentity * peer) +{ + GNUNET_assert(endpoint != NULL); + struct Sessionqueue * queue = GNUNET_malloc (sizeof (struct Sessionqueue)); + GNUNET_CONTAINER_DLL_insert_tail(endpoint->sessions_head, endpoint->sessions_tail, queue); -//TODO doxigen -struct GNUNET_TIME_Relative -get_next_frag_timeout (struct FragmentMessage * fm) -{ - return GNUNET_TIME_relative_min(GNUNET_TIME_absolute_get_remaining(fm->next_ack), GNUNET_TIME_absolute_get_remaining(fm->timeout)); + queue->content = GNUNET_malloc (sizeof (struct Session)); + queue->content->mac = endpoint; + memcpy(&(queue->content->target), peer, sizeof(struct GNUNET_PeerIdentity)); + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "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; } -//TODO doxigen /** - * Function to get the timeout value for acks for this session + * 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); -struct GNUNET_TIME_Relative -get_ack_timeout (struct FragmentMessage * fm){ - struct GNUNET_TIME_Relative timeout; - timeout.rel_value = FRAGMENT_TIMEOUT; - return timeout; + if (session != NULL) + return session; + return create_session(plugin, mac, peer); } -//TODO doxigen /** - * Function to set the timer for the next timeout of the fragment queue + * 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 -check_next_fragment_timeout (struct Plugin * plugin){ - struct FragmentMessage * fm; - if (plugin->server_write_task != GNUNET_SCHEDULER_NO_TASK){ - GNUNET_SCHEDULER_cancel(plugin->server_write_task); - } - fm = plugin->pending_Fragment_Messages_head; - if (fm != NULL){ - plugin->server_write_task = GNUNET_SCHEDULER_add_delayed(get_next_frag_timeout(fm), &delay_fragment_task, plugin); - } +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++; + } + } -//TODO doxigen /** - * Function to get the next queued Session, removes the session from the queue + * 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; -static struct Session * -get_next_queue_Session (struct Plugin * plugin){ - struct Session * session; - struct Sessionqueue * sessionqueue; - struct Sessionqueue * sessionqueue_alt; - struct PendingMessage * pm; - sessionqueue = plugin->pending_Sessions; - while (sessionqueue != NULL){ - session = sessionqueue->content; - pm = session->pending_message; - - //check for message timeout - if (GNUNET_TIME_absolute_get_remaining(pm->timeout).rel_value > 0){ - //check if session has no message in the fragment queue - if (! session->has_fragment){ - plugin->pendingsessions --; - GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions, - plugin->pending_Sessions_tail, sessionqueue); - GNUNET_free(sessionqueue); - - return session; - } else { - sessionqueue = sessionqueue->next; - } - } else { - - session->pending_message = NULL; - //call the cont func that it did not work - if (pm->transmit_cont != NULL) - pm->transmit_cont (pm->transmit_cont_cls, - &(session->target), GNUNET_SYSERR); - GNUNET_free(pm->msg); - GNUNET_free(pm); - - sessionqueue_alt = sessionqueue; - sessionqueue = sessionqueue->next; - plugin->pendingsessions --; - GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions, - plugin->pending_Sessions_tail, sessionqueue_alt); - - GNUNET_free(sessionqueue_alt); - - } - - - } - return NULL; + 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); + } } -//TODO doxigen /** - * Function to sort the message into the message fragment queue + * Function to calculate the time of the next periodic "hello-beacon" + * @param plugin pointer to the plugin struct */ + static void -sort_fragment_into_queue (struct Plugin * plugin, struct FragmentMessage * fm){ - struct FragmentMessage * fm2; - //sort into the list at the right position - - fm2 = plugin->pending_Fragment_Messages_head; - - while (fm2 != NULL){ - if (GNUNET_TIME_absolute_get_difference(fm2->next_ack, fm->next_ack).rel_value == 0){ - break; - } else { - fm2 = fm2->next; - } - } - - GNUNET_CONTAINER_DLL_insert_after(plugin->pending_Fragment_Messages_head, - plugin->pending_Fragment_Messages_tail,fm2,fm); +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, + HALLO_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 * HALLO_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, + HALLO_BEACON_SCALING_FACTOR)); + } } -//TODO doxigen /** - * Function to check if there is some space in the fragment queue + * Function to set the timer for the next timeout of the fragment queue + * @param plugin the handle to the plugin struct */ static void -check_fragment_queue (struct Plugin * plugin){ - struct Session * session; - struct FragmentMessage * fm; - - struct PendingMessage * pm; - - if (plugin->pending_fragment_messages < FRAGMENT_QUEUE_SIZE){ - session = get_next_queue_Session(plugin); - if (session != NULL){ - pm = session->pending_message; - session->pending_message = NULL; - session->has_fragment = 1; - GNUNET_assert(pm != NULL); - - fm = GNUNET_malloc(sizeof(struct FragmentMessage)); - fm->message_size = pm->message_size; - fm->msg = pm->msg; - fm->session = session; - fm->timeout.abs_value = pm->timeout.abs_value; - fm->message_pos = 0; - fm->next_ack = GNUNET_TIME_absolute_get(); - - if (pm->transmit_cont != NULL) - pm->transmit_cont (pm->transmit_cont_cls, - &(session->target), GNUNET_OK); - GNUNET_free(pm); - - sort_fragment_into_queue(plugin,fm); - plugin->pending_fragment_messages ++; - - //generate new message id - session->message_id_out = get_next_message_id(); - - //check if timeout changed - check_next_fragment_timeout(plugin); - } - } +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(GNUNET_ERROR_TYPE_DEBUG, "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 called to when wlan helper is ready to get some data - * - * @param cls closure - * @param GNUNET_SCHEDULER_TaskContext + * 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 DEBUG_wlan + if (pm == NULL) + { + GNUNET_log(GNUNET_ERROR_TYPE_ERROR, + "pending message is empty, should not happen. session %p\n", + session); + } +#endif + GNUNET_assert(pm != NULL); + + //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_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_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 -do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +free_fragment_message(struct Plugin * plugin, struct FragmentMessage * fm) { + struct Session * session = fm->session; + struct MacEndpoint * endpoint = session->mac; + struct FragmentMessage_queue * fmq; + struct FragmentMessage_queue * fmq_next; - struct Plugin * plugin = cls; - plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; + if (fm != NULL) + { + fmq = plugin->sending_messages_head; + while (fmq != NULL) + { + fmq_next = fmq->next; + if (fmq->content == fm) + { + GNUNET_CONTAINER_DLL_remove(plugin->sending_messages_head,plugin->sending_messages_tail, fmq); + GNUNET_free(fmq); + } + fmq = fmq_next; + } + + (session->mac->fragment_messages_out_count)--; + session->fragment_messages_out_count--; + plugin->pending_Fragment_Messages--; + GNUNET_CONTAINER_DLL_remove(endpoint->sending_messages_head,endpoint->sending_messages_tail, fm); + GNUNET_FRAGMENT_context_destroy(fm->fragcontext); + GNUNET_free(fm); + + queue_session(plugin, session); +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Free pending fragment messages %p, session %p\n", fm, session); +#endif + } +} - ssize_t bytes; +/** + * 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 (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) - return; + if (endpoint != NULL) + { + header->rate = endpoint->rate; + header->tx_power = endpoint->tx_power; + header->antenna = endpoint->antenna; + } + else + { + header->rate = 255; + header->tx_power = 0; + header->antenna = 0; + } - struct Session * session; - struct FragmentMessage * fm; - 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 AckQueue * akt = NULL; - //int exit = 0; - - fm = plugin->pending_Fragment_Messages_head; - GNUNET_assert(fm != NULL); - session = fm->session; - GNUNET_assert(session != NULL); - - // test if message timed out - if (GNUNET_TIME_absolute_get_remaining(fm->timeout).rel_value == 0){ - free_acks(fm); - GNUNET_assert(plugin->pending_fragment_messages > 0); - plugin->pending_fragment_messages --; - GNUNET_CONTAINER_DLL_remove(plugin->pending_Fragment_Messages_head, - plugin->pending_Fragment_Messages_tail, fm); - - GNUNET_free(fm->msg); - - GNUNET_free(fm); - check_fragment_queue(plugin); - } else { - - if (fm->message_size > WLAN_MTU) { - size += sizeof(struct FragmentationHeader); - // check/set for retransmission - if (GNUNET_TIME_absolute_get_duration(fm->next_ack).rel_value == 0) { - - // be positive and try again later :-D - fm->next_ack = GNUNET_TIME_relative_to_absolute(get_ack_timeout(fm)); - // find first missing fragment - akt = fm->head; - fm->message_pos = 0; - - //test if ack 0 was already received - while (akt != NULL){ - //if fragment is present, take next - if (akt->fragment_num == fm->message_pos) { - fm->message_pos ++; - } - //next ack is bigger then the fragment number - //in case there is something like this: (acks) 1, 2, 5, 6, ... - //and we send 3 again, the next number should be 4 - else if (akt->fragment_num > fm->message_pos) { - break; - } - - akt = akt->next; - - } - - - } - - copyoffset = (WLAN_MTU - sizeof(struct FragmentationHeader)) * fm->message_pos; - fragheader.fragment_off_or_num = htons(fm->message_pos); - fragheader.message_id = htonl(session->message_id_out); - - // start should be smaller then the packet size - GNUNET_assert(copyoffset < fm->message_size); - copystart = fm->msg + copyoffset; - - //size of the fragment is either the MTU - overhead - //or the missing part of the message in case this is the last fragment - copysize = GNUNET_MIN(fm->message_size - copyoffset, - WLAN_MTU - sizeof(struct FragmentationHeader)); - fragheader.header.size = htons(copysize); - fragheader.header.type = GNUNET_MESSAGE_TYPE_WLAN_FRAGMENT; - - - //get the next missing fragment - akt = fm->head; - fm->message_pos ++; - - //test if ack was already received - while (akt != NULL){ - //if fragment is present, take next - if (akt->fragment_num == fm->message_pos) { - fm->message_pos ++; - } - //next ack is bigger then the fragment number - //in case there is something like this: (acks) 1, 2, 5, 6, ... - //and we send 3 again, the next number should be 4 - else if (akt->fragment_num > fm->message_pos) { - break; - } - - akt = akt->next; - } - } else { - // there is no need to split - copystart = fm->msg; - copysize = fm->message_size; - } - - size += copysize; - size += sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader) - + sizeof(struct GNUNET_MessageHeader); - msgheader = GNUNET_malloc(size); - msgheader->size = htons(size - 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 (fm->message_size > WLAN_MTU){ - fragheader.message_crc = htons(getcrc16(copystart, copysize)); - memcpy(&wlanheader[1],&fragheader, sizeof(struct FragmentationHeader)); - memcpy(&wlanheader[1] + sizeof(struct FragmentationHeader),copystart,copysize); - } else { - memcpy(&wlanheader[1],copystart,copysize); - } - - bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size); - GNUNET_assert(bytes == size); - - //check if this was the last fragment of this message, if true then queue at the end of the list - if (copysize + copyoffset >= fm->message_size){ - GNUNET_assert(copysize + copyoffset == fm->message_size); - - GNUNET_CONTAINER_DLL_remove (plugin->pending_Fragment_Messages_head, - plugin->pending_Fragment_Messages_tail, fm); - - GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Fragment_Messages_head, - plugin->pending_Fragment_Messages_tail, fm); - // if fragments have opimized timeouts - //sort_fragment_into_queue(plugin,fm); - - } - check_next_fragment_timeout(plugin); - - } + 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 + * @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); + +#if DEBUG_wlan_ip_udp_packets_on_air + 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->llc[0] = 6; + Header->llc[1] = 6; + Header->udp.len = htons(size - sizeof(struct ieee80211_frame)); + +#endif + + return GNUNET_YES; +} /** * 32bit CRC @@ -933,10 +1234,10 @@ do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) */ uint32_t -getcrc32 (const char *msgbuf, - size_t msgbuf_size){ - //TODO calc some crc - return 0; +getcrc32(const char *msgbuf, size_t msgbuf_size) +{ + + return GNUNET_CRYPTO_crc32_n(msgbuf, msgbuf_size);; } /** @@ -949,10 +1250,451 @@ getcrc32 (const char *msgbuf, */ uint16_t -getcrc16 (const char *msgbuf, - size_t msgbuf_size){ - //TODO calc some crc - return 0; +getcrc16(const char *msgbuf, size_t msgbuf_size) +{ + //TODO calc some crc + return 0; +} + +/** + * function 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 + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Adding fragment of message %p to send, session %p, endpoint %p\n", fm, + fm->session, endpoint); +#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); +} + +/** + * function to send a hallo beacon + * @param plugin pointer to the plugin struct + */ +static void +send_hello_beacon(struct Plugin * plugin) +{ + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending hello beacon\n"); +#endif + + uint16_t size; + ssize_t bytes; + uint16_t hallo_size; + struct GNUNET_MessageHeader * msgheader; + struct ieee80211_frame * ieeewlanheader; + struct Radiotap_Send * radioHeader; + struct GNUNET_MessageHeader * msgheader2; + + hallo_size = GNUNET_HELLO_size(*(plugin->env->our_hello)); + GNUNET_assert(sizeof(struct WlanHeader) + hallo_size <= WLAN_MTU); + size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send) + + sizeof(struct ieee80211_frame) + sizeof(struct GNUNET_MessageHeader) + + hallo_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(*(plugin->env->our_hello)) + + sizeof(struct GNUNET_MessageHeader)); + + msgheader2->type = htons(GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT); + memcpy(&msgheader2[1], *plugin->env->our_hello, hallo_size); + + bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msgheader, size); + + if (bytes == GNUNET_SYSERR) + { + GNUNET_log(GNUNET_ERROR_TYPE_ERROR, + _("Error writing to wlan healper. errno == %d, ERROR: %s\n"), + errno, strerror(errno)); + + } + GNUNET_assert(bytes != GNUNET_SYSERR); + GNUNET_assert(bytes == size); + GNUNET_free(msgheader); + + set_next_beacon_time(plugin); + set_next_send(plugin); +} + +/** + * function to add an ack to send it for a received fragment + * @param cls MacEndpoint this ack belongs to + * @param msg_id id of the message + * @param hdr pointer to the hdr where the ack is stored + * + */ + +static void +add_ack_for_send(void *cls, uint32_t msg_id, + const struct GNUNET_MessageHeader *hdr) +{ + + struct AckSendQueue * ack; + + GNUNET_assert(cls != NULL); + struct MacEndpoint * endpoint = cls; + struct Plugin * plugin = endpoint->plugin; + struct GNUNET_MessageHeader * msgheader; + struct GNUNET_MessageHeader * msgheader2; + uint16_t size; + + size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send) + + sizeof(struct ieee80211_frame) + ntohs(hdr->size) + + sizeof(struct AckSendQueue); + + ack = GNUNET_malloc(size); + ack->message_id = msg_id; + ack->endpoint = endpoint; + + size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send) + + sizeof(struct ieee80211_frame) + ntohs(hdr->size); + + msgheader = (struct GNUNET_MessageHeader *) &ack[1]; + ack->hdr = (struct GNUNET_MessageHeader *) &ack[1]; + msgheader->size = htons(size); + msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA); + + ack->radioHeader = (struct Radiotap_Send*) &msgheader[1]; + ack->ieeewlanheader = (struct ieee80211_frame*) &(ack->radioHeader)[1]; + msgheader2 = (struct GNUNET_MessageHeader*) &(ack->ieeewlanheader)[1]; + memcpy(msgheader2, hdr, ntohs(hdr->size)); + + GNUNET_CONTAINER_DLL_insert_tail(plugin->ack_send_queue_head, + plugin->ack_send_queue_tail, ack); + +#if DEBUG_wlan_retransmission + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Adding ack with message id %u to send, AckSendQueue %p, endpoint %p\n", + msg_id, ack, endpoint); +#endif + + set_next_send(plugin); +} + +/** + * Function to check if there is some space in the fragment queue + * inserts a message if space is available + * @param plugin the plugin struct + */ + +static void +check_fragment_queue(struct Plugin * plugin) +{ + struct Session * session; + struct FragmentMessage * fm; + struct GNUNET_PeerIdentity pid; + + struct PendingMessage * pm; + + if (plugin->pending_Fragment_Messages < FRAGMENT_QUEUE_SIZE) + { + session = get_next_queue_session(plugin); + if (session != NULL) + { + pm = session->pending_message_head; + GNUNET_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_assert(pm != NULL); + + 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); + 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(GNUNET_ERROR_TYPE_DEBUG, + "called pm->transmit_cont for %p\n", session); +#endif + } + else + { +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "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 + * @param ack pointer to the ack to send + */ +static void +send_ack(struct Plugin * plugin, struct AckSendQueue * ack) +{ + + ssize_t bytes; + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "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 + + 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(GNUNET_ERROR_TYPE_ERROR, + _("Error writing to wlan healper. errno == %d, ERROR: %s\n"), + errno, strerror(errno)); + + } + GNUNET_assert(bytes != GNUNET_SYSERR); + GNUNET_assert(bytes == ntohs(ack->hdr->size)); + set_next_send(plugin); +} + +/** + * function to finish a sending if not all could have been writen befor + * @param cls pointer to the Finish_send struct + * @param tc TaskContext + */ +static void +finish_sending(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Finish_send * finish = cls; + struct Plugin * plugin; + ssize_t bytes; + + plugin = finish->plugin; + plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; + + if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason)) + { + GNUNET_free (finish->msgstart); + GNUNET_free (finish); + return; + } + bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, + finish->msgheader, finish->size); + GNUNET_assert (bytes != GNUNET_SYSERR); + + if (bytes != finish->size) + { + finish->msgheader = finish->msgheader + bytes; + finish->size = 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 + { + GNUNET_free(finish->msgstart); + GNUNET_free(finish); + set_next_send(plugin); + } +} + +/** + * Function called when wlan helper is ready to get some data + * + * @param cls closure + * @param tc GNUNET_SCHEDULER_TaskContext + */ +static void +do_transmit(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct Plugin * plugin = cls; + + 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; + struct AckSendQueue * ack; + ssize_t bytes; + + if (plugin->ack_send_queue_head != NULL) + { + ack = plugin->ack_send_queue_head; + GNUNET_CONTAINER_DLL_remove(plugin->ack_send_queue_head, + plugin->ack_send_queue_tail, ack); + send_ack(plugin, ack); + GNUNET_free(ack); + 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) + { + 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( + GNUNET_ERROR_TYPE_DEBUG, + "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 == GNUNET_SYSERR) + { + GNUNET_log(GNUNET_ERROR_TYPE_ERROR, + _("Error writing to wlan healper. errno == %d, ERROR: %s\n"), + errno, strerror(errno)); + + } + GNUNET_assert(bytes != GNUNET_SYSERR); + + if (bytes != fm->size) + { + finish = GNUNET_malloc(sizeof( struct Finish_send)); + finish->plugin = plugin; + finish->msgheader = fm->frag + bytes; + finish->size = fm->size - bytes; + finish->msgstart = (struct GNUNET_MessageHeader *) fm->frag; + + GNUNET_assert(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, + &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(GNUNET_ERROR_TYPE_WARNING, + "do_transmit did nothing, should not happen!\n"); +} + +/** + * Another peer has suggested an address for this + * peer and transport plugin. Check that this could be a valid + * address. If so, consider adding it to the list + * of addresses. + * + * @param cls closure + * @param addr pointer to the address + * @param addrlen length of addr + * @return GNUNET_OK if this is a plausible address for this peer + * and transport + */ +static int +wlan_plugin_address_suggested(void *cls, const void *addr, size_t addrlen) +{ + //struct Plugin *plugin = cls; + + /* check if the address is plausible; if so, + add it to our list! */ + + GNUNET_assert(cls !=NULL); + //FIXME mitm is not checked + //Mac Address has 6 bytes + if (addrlen == 6) + { + /* TODO check for bad addresses like multicast, broadcast, etc */ + return GNUNET_OK; + } + + return GNUNET_SYSERR; } /** @@ -964,7 +1706,7 @@ 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)) @@ -982,69 +1724,190 @@ 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 PendingMessage * newmsg; + struct WlanHeader * wlanheader; + //check if msglen > 0 GNUNET_assert(msgbuf_size > 0); //get session if needed - if (session == NULL) { - if ( wlan_plugin_address_suggested(plugin , addr, addrlen) == GNUNET_OK){ - session = get_Session(plugin, addr); - } else { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("Wlan Address len %d is wrong\n"), - addrlen); - return -1; - } - } - - //TODO target "problem" not solved - session->target = *target; + if (session == NULL) + { + if (wlan_plugin_address_suggested(plugin, addr, addrlen) == GNUNET_OK) + { + session = get_session(plugin, addr, target); + } + else + { + GNUNET_log(GNUNET_ERROR_TYPE_ERROR, + _("Wlan Address len %d is wrong\n"), addrlen); + return -1; + } + } //queue message: - //first queue session - queue_Session(plugin, session); //queue message in session - if (session->pending_message == NULL){ - newmsg = GNUNET_malloc(sizeof(struct PendingMessage)); - (newmsg->msg) = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader)); - wlanheader = (struct WlanHeader *) newmsg->msg; - //copy msg to buffer, not fragmented / segmented yet, but with message header - wlanheader->header.size = htons(msgbuf_size); - wlanheader->header.type = GNUNET_MESSAGE_TYPE_WLAN_DATA; - wlanheader->target = *target; - wlanheader->crc = getcrc32(msgbuf, msgbuf_size); - memcpy(&wlanheader[1], msgbuf, msgbuf_size); - newmsg->transmit_cont = cont; - newmsg->transmit_cont_cls = cont_cls; - newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout); - newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader); - } else { - //TODO if message is send while hello is still pending, other cases should not occur - } + //test if there is no other message in the "queue" + //FIXME: to many send requests + if (session->pending_message_head != NULL) + { + newmsg = session->pending_message_head; + GNUNET_log( + GNUNET_ERROR_TYPE_ERROR, + "wlan_plugin_send: a pending message is already in the queue for this client\n remaining time to send this message is %u, queued fragment messages for this mac connection %u\n", + GNUNET_TIME_absolute_get_remaining(newmsg->timeout).rel_value, + session->mac->fragment_messages_out_count); + } + + newmsg = GNUNET_malloc(sizeof(struct PendingMessage)); + newmsg->msg = GNUNET_malloc(msgbuf_size + sizeof(struct WlanHeader)); + wlanheader = newmsg->msg; + //copy msg to buffer, not fragmented / segmented yet, but with message header + wlanheader->header.size = htons(msgbuf_size + sizeof(struct WlanHeader)); + wlanheader->header.type = htons(GNUNET_MESSAGE_TYPE_WLAN_DATA); + memcpy(&(wlanheader->target), target, sizeof(struct GNUNET_PeerIdentity)); + memcpy(&(wlanheader->source), plugin->env->my_identity, + sizeof(struct GNUNET_PeerIdentity)); + wlanheader->crc = 0; + memcpy(&wlanheader[1], msgbuf, msgbuf_size); + wlanheader->crc = htonl( + getcrc32((char*) wlanheader, msgbuf_size + sizeof(struct WlanHeader))); + //GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Wlan message Header crc: %u, %u\n",getcrc32((char*) wlanheader, msgbuf_size + sizeof(struct WlanHeader)), wlanheader->crc); + //hexdump(newmsg->msg, msgbuf_size + sizeof(struct WlanHeader)); + + newmsg->transmit_cont = cont; + newmsg->transmit_cont_cls = cont_cls; + newmsg->timeout = GNUNET_TIME_relative_to_absolute(timeout); + + newmsg->timeout.abs_value = newmsg->timeout.abs_value - 500; + + newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader); + + GNUNET_CONTAINER_DLL_insert_tail(session->pending_message_head, session->pending_message_tail, newmsg); + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "New message for %p with size (incl wlan header) %u added\n", session, + newmsg->message_size); +#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 endpoin pointer to the MacEndpoint to free + */ +static void +free_macendpoint(struct Plugin * plugin, struct MacEndpoint * endpoin) +{ + struct Sessionqueue * sessions; + struct Sessionqueue * sessions_next; + GNUNET_assert(endpoin != NULL); + + sessions = endpoin->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,endpoin); + GNUNET_free(endpoin); +} + +/** + * 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(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->next; + if (pendingsession->content == queue->content) + { + plugin->pendingsessions--; + GNUNET_CONTAINER_DLL_remove (plugin->pending_Sessions_head, + plugin->pending_Sessions_tail, + pendingsession); + GNUNET_free(pendingsession); + + GNUNET_assert (check == 0); + check = 1; + } + pendingsession = pendingsession_tmp; + } + + 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; + } + + // 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); + + if (endpoint->sessions_head == NULL && do_free_macendpoint == GNUNET_YES) + { + free_macendpoint(plugin, endpoint); + } + GNUNET_free(queue->content); + GNUNET_free(queue); + check_fragment_queue(plugin); +} /** * Function that can be used to force the plugin to disconnect @@ -1055,39 +1918,35 @@ 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; - struct Sessionqueue * queue = plugin->sessions; - struct Sessionqueue * lastitem = NULL; - struct PendingMessage * pm; - - // just look at all the session for the needed one - while (queue != NULL){ - // content is never NULL - GNUNET_assert (queue->content == NULL); - if (memcmp(target, &(queue->content->target), sizeof(struct GNUNET_PeerIdentity)) == 0) - { - // session found - // remove PendingMessage - pm = queue->content->pending_message; - GNUNET_free(pm->msg); - GNUNET_free(pm); - - GNUNET_free(queue->content); - GNUNET_CONTAINER_DLL_remove(plugin->sessions, plugin->sessions_tail, queue); - GNUNET_free(queue); - - return; - } - // try next - lastitem = queue; - queue = queue->next; - } + struct Plugin *plugin = cls; + struct Sessionqueue * queue; + struct Sessionqueue * queue_next; + struct MacEndpoint * endpoint = plugin->mac_head; + struct MacEndpoint * endpoint_next; + // just look at all the session for the needed one + while (endpoint != NULL) + { + queue = endpoint->sessions_head; + endpoint_next = endpoint->next; + while (queue != NULL) + { + // content is never NULL + GNUNET_assert (queue->content != NULL); + queue_next = queue->next; + if (memcmp(target, &(queue->content->target), + sizeof(struct GNUNET_PeerIdentity)) == 0) + { + free_session(plugin, queue, GNUNET_YES); + } + // try next + queue = queue_next; + } + endpoint = endpoint_next; + } } - /** * Convert the transports address to a nice, human-readable * format. @@ -1103,223 +1962,724 @@ 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); + + //GNUNET_assert(cls !=NULL); if (addrlen != 6) { - /* invalid address (MAC addresses have 6 bytes) */ - GNUNET_break (0); - asc (asc_cls, NULL); + /* 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]); - asc (asc_cls, ret); + GNUNET_snprintf(ret, sizeof(ret), + "%s Mac-Address %.2X:%.2X:%.2X:%.2X:%.2X:%.2X", PROTOCOL_PREFIX, + input[0], input[1], input[2], input[3], input[4], input[5]); + asc(asc_cls, ret); } - - /** - * 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 plugin + * @param session_light + * @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 char * tempmsg; + const struct GNUNET_MessageHeader * temp_hdr; + struct GNUNET_PeerIdentity tmpsource; + int crc; + if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA) + { -static int -wlan_plugin_address_suggested (void *cls, - const void *addr, - size_t addrlen) -{ - //struct Plugin *plugin = cls; +#if DEBUG_wlan + GNUNET_log( + GNUNET_ERROR_TYPE_DEBUG, + "Func wlan_data_message_handler got GNUNET_MESSAGE_TYPE_WLAN_DATA size: %u\n", + ntohs(hdr->size)); +#endif - /* check if the address is plausible; if so, - add it to our list! */ + if (ntohs(hdr->size) < sizeof(struct WlanHeader) + + sizeof(struct GNUNET_MessageHeader)) + { + //packet not big enought + return; + } + + wlanheader = (struct WlanHeader *) hdr; + + session = search_session(plugin, endpoint, &wlanheader->source); + + //tempmsg = (char*) &wlanheader[1]; + temp_hdr = (const struct GNUNET_MessageHeader *) &wlanheader[1]; + crc = ntohl(wlanheader->crc); + wlanheader->crc = 0; + if (getcrc32((char *) wlanheader, ntohs(wlanheader->header.size)) != crc) + { + //wrong crc, dispose message + GNUNET_log(GNUNET_ERROR_TYPE_INFO, + "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( + GNUNET_ERROR_TYPE_DEBUG, + "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(GNUNET_ERROR_TYPE_WARNING, + "WLAN client not in session list and hello message is not okay\n"); + return; + } + + } + else + { + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, + "WLAN client not in session list and not a hello message\n"); + return; + } + } + else + { + GNUNET_log( + GNUNET_ERROR_TYPE_WARNING, + "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( + GNUNET_ERROR_TYPE_DEBUG, + "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(GNUNET_ERROR_TYPE_DEBUG, + "WLAN peer target id doesn't match our peer id: session %p\n", + session); +#endif + return; + } - GNUNET_assert(cls !=NULL); - //FIXME mitm is not checked - //Mac Adress has 6 bytes - if (addrlen == 6){ - /* TODO check for bad addresses like milticast, broadcast, etc */ - return GNUNET_OK; - } else { - return GNUNET_SYSERR; - } + GNUNET_SERVER_mst_receive(plugin->data_tokenizer, session, + (const char *) temp_hdr, + ntohs(hdr->size) - sizeof(struct WlanHeader), GNUNET_YES, GNUNET_NO); - return GNUNET_SYSERR; + return; + } + else + { + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, + "wlan_data_message_handler got wrong message type\n"); + return; + } } +//TODO DOXIGEN +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_TRANSPORT_ATS_Information distance[2]; + distance[0].type = htonl(GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE); + distance[0].value = htonl(1); + distance[1].type = htonl(GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR); + distance[1].value = htonl(0); + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "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_TRANSPORT_ATS_Information *) &distance, 2, session, + (const char*) &session->mac->addr, sizeof(session->mac->addr)); +} /** - * Function called for a quick conversion of the binary address to - * a numeric address. Note that the caller must not free the - * address and that the next call to this function is allowed - * to override the address again. + * Function used for to process the data received from the wlan interface * - * @param cls closure - * @param addr binary address - * @param addrlen length of the address - * @return string representing the same address + * @param cls the plugin handle + * @param session_light FIXME: document + * @param hdr hdr of the GNUNET_MessageHeader */ -static const char* -wlan_plugin_address_to_string (void *cls, - const void *addr, - size_t addrlen) +static void +wlan_data_helper(void *cls, struct Session_light * session_light, + const struct GNUNET_MessageHeader * hdr, const struct Radiotap_rx * rxinfo) { - char ret[92]; - const unsigned char * input; - - GNUNET_assert(cls !=NULL); - if (addrlen != 6) + struct Plugin *plugin = cls; + struct FragmentMessage * fm; + struct FragmentMessage * fm2; + + //ADVERTISEMENT + if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT) { - /* invalid address (MAC addresses have 6 bytes) */ - GNUNET_break (0); - return NULL; + + //TODO better DOS protection, error handling + //TODO test first than create session + GNUNET_assert(session_light != NULL); + +#if DEBUG_wlan + GNUNET_log( + GNUNET_ERROR_TYPE_DEBUG, + "Func wlan_data_helper got GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT 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_NO); + } + GNUNET_assert(GNUNET_HELLO_get_id( + (const struct GNUNET_HELLO_Message *) &hdr[1], + &(session_light->session->target) ) != GNUNET_SYSERR); + } - 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); + + //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( + GNUNET_ERROR_TYPE_DEBUG, + "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 + + 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( + GNUNET_ERROR_TYPE_DEBUG, + "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( + GNUNET_ERROR_TYPE_DEBUG, + "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; + int ret = GNUNET_FRAGMENT_process_ack(fm->fragcontext, hdr); + if (ret == GNUNET_OK) + { +#if DEBUG_wlan_retransmission + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Got last ack, finished fragment message %p\n", fm); +#endif + session_light->macendpoint->acks++; + free_fragment_message(plugin, fm); + check_fragment_queue(plugin); + return; + } + if (ret == GNUNET_NO) + { +#if DEBUG_wlan_retransmission + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got ack for: %p\n", fm); +#endif + session_light->macendpoint->acks++; + return; + } + if (ret == GNUNET_SYSERR) + { + + } + + fm = fm2; + } + +#if DEBUG_wlan_retransmission + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "WLAN fragment not in fragment list\n"); +#endif + return; + + } + else + { + // TODO Wrong data? + GNUNET_log( + GNUNET_ERROR_TYPE_INFO, + "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(GNUNET_ERROR_TYPE_DEBUG, + "Helper finished\n"); +#endif + } +//TODO DOXIGEN +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 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)); + 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); + + plugin->mac_count++; + GNUNET_CONTAINER_DLL_insert_tail(plugin->mac_head, plugin->mac_tail, newend); +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "New Mac Endpoint %p: %s\n", newend, + wlan_plugin_address_to_string(NULL, newend->addr.mac, 6)); +#endif + return newend; +} /** * Function used for to process the data from the suid process + * + * @param cls the plugin handle + * @param client client that send the data (not used) + * @param hdr header of the GNUNET_MessageHeader */ -//TODO doxigen - static void -wlan_process_helper (void *cls, - void *client, - const struct GNUNET_MessageHeader *hdr) +wlan_process_helper(void *cls, void *client, + const struct GNUNET_MessageHeader *hdr) { struct Plugin *plugin = cls; - if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA){ - //TODO DATA - } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT){ - //TODO ADV - } else if (hdr->type == GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL){ - //TODO Control - if (hdr->size == 6){ - plugin->mac_address = GNUNET_malloc(6); - memcpy(plugin->mac_address, &hdr[1],6); - GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Notifying transport of address %s\n", wlan_plugin_address_to_string(cls, plugin->mac_address, hdr->size)); - plugin->env->notify_address (plugin->env->cls, - "wlan", - &plugin->mac_address, sizeof(plugin->mac_address), - GNUNET_TIME_UNIT_FOREVER_REL); - } else { - GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Wrong wlan mac address %s\n", plugin->mac_address); - } + 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; - } else { - // TODO Wrong data? - } -} + switch (ntohs(hdr->type)) + { + case GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA: +#if DEBUG_wlan + GNUNET_log( + GNUNET_ERROR_TYPE_DEBUG, + "Func wlan_process_helper got GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA size: %u\n", + ntohs(hdr->size)); +#endif + //call wlan_process_helper with the message inside, later with wlan: analyze signal + if (ntohs(hdr->size) < sizeof(struct ieee80211_frame) + + sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_rx)) + { +#if DEBUG_wlan + GNUNET_log( + GNUNET_ERROR_TYPE_DEBUG, + "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; + } + 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 + + //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) + { + + // 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); + + pos = 0; + while (pos < datasize) + { + temp_hdr = (struct GNUNET_MessageHeader *) &wlanIeeeHeader[1] + + pos; + + wlan_data_helper(plugin, session_light, temp_hdr, rxinfo); + pos += ntohs(temp_hdr->size); + + } + + //clean up + GNUNET_free(session_light); + } + else + { +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Func wlan_process_helper got wrong MAC: %s\n", + macprinter(wlanIeeeHeader->i_addr1)); +#endif + } + } + else + { +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Func wlan_process_helper got wrong BSSID: %s\n", + macprinter(wlanIeeeHeader->i_addr2)); +#endif + } + break; + case GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL: + //TODO more control messages + //TODO use struct wlan_helper_control + 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( + GNUNET_ERROR_TYPE_DEBUG, + "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: + GNUNET_break (0); + return; + } +} +/** + * 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) +wlan_plugin_helper_read(void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) { struct Plugin *plugin = cls; - char mybuf[WLAN_MTU]; - ssize_t bytes; + plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK; - if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) + if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) return; - bytes = GNUNET_DISK_file_read (plugin->server_stdout_handle, - mybuf, sizeof(mybuf)); + + 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_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - _("Finished reading from wlan-helper stdout with code: %d\n"), bytes); +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + _("Finished reading from wlan-helper stdout with code: %d\n"), + bytes); #endif return; } - GNUNET_SERVER_mst_receive(plugin->consoltoken, NULL, - mybuf, bytes, 0, GNUNET_NO); + 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 - * + * @param testmode should we use the dummy driver for testing? * @return GNUNET_YES if process was started, GNUNET_SYSERR on error */ static int -wlan_transport_start_wlan_helper (struct Plugin *plugin) +wlan_transport_start_wlan_helper(struct Plugin *plugin, int testmode) { - - plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_NO, GNUNET_YES); + const char * filenamehw = "gnunet-transport-wlan-helper"; + const char * filenameloopback = "gnunet-transport-wlan-helper-dummy"; + plugin->server_stdout = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_NO, GNUNET_YES); if (plugin->server_stdout == NULL) return GNUNET_SYSERR; - plugin->server_stdin = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO); - if (plugin->server_stdin == NULL) - return GNUNET_SYSERR; + plugin->server_stdin = GNUNET_DISK_pipe(GNUNET_YES, GNUNET_YES, GNUNET_NO); + if (plugin->server_stdin == NULL) + return GNUNET_SYSERR; -#if DEBUG_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Starting gnunet-wlan-helper process cmd: %s %s\n", "gnunet-wlan-helper", plugin->interface); -#endif /* Start the server process */ - plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin, plugin->server_stdout, "gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", plugin->interface, NULL); + + if (testmode == 0) + { + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Starting gnunet-wlan-helper process cmd: %s %s %i\n", filenamehw, + plugin->interface, testmode); +#endif + + plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin, + plugin->server_stdout, filenamehw, filenamehw, plugin->interface, + NULL); + } + else if (testmode == 1) + { + +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Starting gnunet-wlan-helper loopback 1 process cmd: %s %s %i\n", + filenameloopback, plugin->interface, testmode); +#endif + + plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin, + plugin->server_stdout, filenameloopback, filenameloopback, "1", NULL); + } + else if (testmode == 2) + { +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Starting gnunet-wlan-helper loopback 2 process cmd: %s %s %i\n", + filenameloopback, plugin->interface, testmode); +#endif + plugin->server_proc = GNUNET_OS_start_process(plugin->server_stdin, + plugin->server_stdout, filenameloopback, filenameloopback, "2", NULL); + } if (plugin->server_proc == NULL) { -#if DEBUG_TCP_NAT - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Failed to start gnunet-wlan-helper process\n"); +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, + "Failed to start gnunet-wlan-helper process\n"); #endif return GNUNET_SYSERR; } + /* Close the 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); + 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(GNUNET_ERROR_TYPE_DEBUG, + "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); - 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; } +/** + * Exit point from the plugin. + * @param cls pointer to the api struct + */ + +//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(GNUNET_ERROR_TYPE_DEBUG, + "libgnunet_plugin_transport_wlan_done started\n"); +#endif + + GNUNET_DISK_pipe_close(plugin->server_stdout); + GNUNET_DISK_pipe_close(plugin->server_stdin); + GNUNET_OS_process_kill(plugin->server_proc, 9); + GNUNET_OS_process_close(plugin->server_proc); + + GNUNET_assert (cls !=NULL); + //free sessions + while (endpoint != NULL) + { + endpoint_next = endpoint->next; + free_macendpoint(plugin, endpoint); + endpoint = endpoint_next; + + } + 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; + } + + 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. @@ -1328,34 +2688,33 @@ 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; + static unsigned long long testmode = 0; GNUNET_assert(cls !=NULL); - service = GNUNET_SERVICE_start ("transport-wlan", env->cfg); - if (service == NULL){ - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - _("Failed to start service for `%s' transport plugin.\n"), - "wlan"); - return NULL; - } - plugin = GNUNET_malloc (sizeof (struct Plugin)); plugin->env = env; plugin->pendingsessions = 0; + plugin->mac_count = 0; plugin->server_write_task = GNUNET_SCHEDULER_NO_TASK; plugin->server_read_task = GNUNET_SCHEDULER_NO_TASK; + plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK; + GNUNET_BANDWIDTH_tracker_init(&plugin->tracker, + GNUNET_BANDWIDTH_value_init(100 * 1024 * 1024 / 8), 100); - wlan_transport_start_wlan_helper(plugin); - plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin); + plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper, + plugin); + + plugin->data_tokenizer = GNUNET_SERVER_mst_create(&process_data, plugin); //plugin->sessions = GNUNET_malloc (sizeof (struct Sessionqueue)); - //plugin->pending_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue)); + //plugin->pending_Sessions_head = GNUNET_malloc (sizeof (struct Sessionqueue)); api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions)); api->cls = plugin; @@ -1364,30 +2723,35 @@ gnunet_plugin_transport_wlan_init (void *cls) api->address_pretty_printer = &wlan_plugin_address_pretty_printer; api->check_address = &wlan_plugin_address_suggested; api->address_to_string = &wlan_plugin_address_to_string; + //read config + if (GNUNET_CONFIGURATION_have_value(env->cfg, "transport-wlan", "TESTMODE")) + { + if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(env->cfg, + "transport-wlan", "TESTMODE", &testmode)) + testmode = 0; //default value + } - start_next_message_id(); - - return api; -} + if (GNUNET_CONFIGURATION_have_value(env->cfg, "transport-wlan", "INTERFACE")) + { + if (GNUNET_CONFIGURATION_get_value_string(env->cfg, "transport-wlan", + "INTERFACE", &(plugin->interface)) != GNUNET_YES) + { + libgnunet_plugin_transport_wlan_done(api); + return NULL; + } + } + //start the plugin + set_next_beacon_time(plugin); -/** - * 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; + wlan_transport_start_wlan_helper(plugin, testmode); - GNUNET_assert(cls !=NULL); +#if DEBUG_wlan + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "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 */