/*
- 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
*/
#include "platform.h"
+#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
-#include "plugin_transport.h"
+#include "gnunet_transport_plugin.h"
#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
+#include "gnunet_crypto_lib.h"
+#include "gnunet_fragmentation_lib.h"
+//#include "wlan/ieee80211.h"
+//#include <netinet/ip.h>
+
+#include <string.h>
#define PROTOCOL_PREFIX "wlan"
-#define WLAN_MTU 3000
+
+/**
+ * Max size of packet from helper
+ */
+#define WLAN_MTU 1450
+
+/**
+ * Time until retransmission of a fragment in ms
+ */
+#define FRAGMENT_TIMEOUT GNUNET_TIME_UNIT_SECONDS
+
+/**
+ * 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
*/
#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.
*/
struct GNUNET_MessageHeader header;
/**
- * Identity of the node connecting (TCP client)
+ * Identit*mac_y of the node connecting (TCP client)
*/
struct GNUNET_PeerIdentity clientIdentity;
struct GNUNET_TRANSPORT_PluginEnvironment *env;
/**
- * List of open sessions.
+ * List of open connections. head
+ */
+ struct MacEndpoint * mac_head;
+
+ /**
+ * List of open connections. tail
*/
- struct Session *sessions;
+ struct MacEndpoint * mac_tail;
/**
- * encapsulation to the local wlan server prog
+ * Number of connections
*/
+ unsigned int mac_count;
- struct GNUNET_SERVER_MessageStreamTokenizer * consoltoken;
+ /**
+ * encapsulation of data from the local wlan helper program
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer * suid_tokenizer;
+ /**
+ * encapsulation of packets received from the wlan helper
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer * data_tokenizer;
/**
* stdout pipe handle for the gnunet-wlan-helper process
const struct GNUNET_DISK_FileHandle *server_stdin_handle;
/**
- * ID of select gnunet-nat-server std read task
+ * ID of the gnunet-wlan-server std read task
*/
GNUNET_SCHEDULER_TaskIdentifier server_read_task;
/**
- * ID of select gnunet-nat-server std read task
- */
+ * ID of the gnunet-wlan-server std read task
+ */
GNUNET_SCHEDULER_TaskIdentifier server_write_task;
/**
- * The process id of the server process (if behind NAT)
+ * ID of the delay task for writing
+ */
+ GNUNET_SCHEDULER_TaskIdentifier server_write_delay_task;
+
+ /**
+ * The process id of the wlan process
*/
- pid_t server_pid;
+ struct GNUNET_OS_Process *server_proc;
/**
* The interface of the wlan card given to us by the user.
/**
* The mac_address of the wlan card given to us by the helper.
*/
- char *mac_address;
+ struct MacAddress mac_address;
/**
* Sessions currently pending for transmission
- * to this peer, if any.
+ * to a peer, if any.
*/
- struct Sessionqueue * pending_Sessions;
+ struct Sessionqueue * pending_Sessions_head;
/**
* Sessions currently pending for transmission
- * to this peer, if any.
+ * to a peer (tail), if any.
+ */
+ struct Sessionqueue * pending_Sessions_tail;
+
+ /**
+ * number of pending sessions
+ */
+ unsigned int pendingsessions;
+
+ /**
+ * Messages in the sending queues
*/
- struct Sessionqueue * all_Sessions;
+ int pending_Fragment_Messages;
+ /**
+ * 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;
+
+ /**
+ * queue to send acks for received fragments (head)
+ */
+ struct AckSendQueue * ack_send_queue_head;
+
+ /**
+ * queue to send acks for received fragments (tail)
+ */
+ struct AckSendQueue * ack_send_queue_tail;
+
+ /**
+ * Tracker for bandwidth limit
+ */
+ struct GNUNET_BANDWIDTH_Tracker tracker;
};
+/**
+ * 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;
+ struct Sessionqueue * next;
+ struct Sessionqueue * prev;
+ struct Session * content;
};
/**
- * Session handle for connections.
+ * Queue of fragmented messages, for the sending queue of the plugin
*/
-struct Session
+//TODO DOXIGEN
+struct FragmentMessage_queue
+{
+ struct FragmentMessage_queue * next;
+ struct FragmentMessage_queue * prev;
+ struct FragmentMessage * content;
+};
+
+/**
+ * Queue for the fragments received
+ */
+//TODO DOXIGEN
+struct Receive_Fragment_Queue
+{
+ struct Receive_Fragment_Queue * next;
+ struct Receive_Fragment_Queue * prev;
+ uint16_t num;
+ const char * msg;
+ uint16_t size;
+ struct Radiotap_rx rxinfo;
+};
+
+//TODO DOXIGEN
+struct MacEndpoint_id_fragment_triple
+{
+ struct MacEndpoint * endpoint;
+ uint32_t message_id;
+ struct FragmentMessage * fm;
+};
+
+//TODO DOXIGEN
+struct Plugin_Session_pair
{
+ struct Plugin * plugin;
+ struct Session * session;
+};
+/**
+ * Information kept for each message that is yet to
+ * be transmitted.
+ */
+struct PendingMessage
+{
/**
- * API requirement.
+ * dll next
*/
- struct SessionHeader header;
+ struct PendingMessage * next;
+ /**
+ * dll prev
+ */
+ struct PendingMessage * prev;
/**
- * Pointer to the global plugin struct.
+ * The pending message
*/
- struct Plugin *plugin;
+ struct WlanHeader *msg;
/**
- * Messages currently pending for transmission
- * to this peer, if any.
+ * Size of the message
*/
- struct PendingMessage *pending_messages_head;
+ size_t message_size;
/**
- * Messages currently pending for transmission
- * to this peer, if any.
+ * Continuation function to call once the message
+ * has been sent. Can be NULL if there is no
+ * continuation to call.
*/
- struct PendingMessage *pending_messages_tail;
+ GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * Cls for transmit_cont
+ */
+ void * transmit_cont_cls;
+
+ /**
+ * Timeout value for the pending message.
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+};
+
+/**
+ * Queue for acks to send for fragments recived
+ */
+struct AckSendQueue
+{
+
+ /**
+ * next ack in the ack send queue
+ */
+ 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.
*/
- struct GNUNET_PeerIdentity * target;
+ uint32_t message_id;
/**
- * encapsulation of the data
+ * msg to send
+ */
+ struct GNUNET_MessageHeader * hdr;
+ /**
+ * pointer to the ieee wlan header
+ */
+ struct ieee80211_frame * ieeewlanheader;
+ /**
+ * pointer to the radiotap header
*/
+ struct Radiotap_Send * radioHeader;
+};
- struct GNUNET_SERVER_MessageStreamTokenizer * datatoken;
+/**
+ * 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;
+};
+
+/**
+ * Session handle for connections.
+ */
+struct Session
+{
+
+ /**
+ * API requirement.
+ */
+ struct SessionHeader header;
+
+ /**
+ * Message currently pending for transmission
+ * to this peer, if any. head
+ */
+ struct PendingMessage * pending_message_head;
- char addr[6];
+ /**
+ * Message currently pending for transmission
+ * to this peer, if any. tail
+ */
+ struct PendingMessage * pending_message_tail;
+ /**
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
+ */
+ struct GNUNET_PeerIdentity target;
/**
* Address of the other peer (either based on our 'connect'
struct GNUNET_TIME_Absolute last_activity;
/**
- * number of message, to distinguish between the messages
+ * peer connection
*/
-
- uint16_t message_num_in;
+ struct MacEndpoint * mac;
/**
- * number of message, to distinguish between the messages
+ * count of messages in the fragment out queue for this session
*/
- uint16_t message_num_out;
-
+ int fragment_messages_out_count;
};
/**
- * Information kept for each message that is yet to
- * be transmitted.
+ * Struct to represent one network card connection
*/
-struct PendingMessage
+struct MacEndpoint
{
-
/**
- * This is a doubly-linked list.
+ * Pointer to the global plugin struct.
*/
- struct PendingMessage *next;
-
+ struct Plugin *plugin;
/**
- * This is a doubly-linked list.
+ * 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 PendingMessage *prev;
+ struct FragmentMessage * sending_messages_head;
/**
- * The pending message
+ * Messages currently sending
+ * to a peer (tail), if any.
+ */
+ struct FragmentMessage * sending_messages_tail;
+ /**
+ * dll next
*/
- const char *msg;
+ struct MacEndpoint *next;
+ /**
+ * dll prev
+ */
+ struct MacEndpoint *prev;
+ /**
+ * peer mac address
+ */
+ struct MacAddress addr;
/**
- * Continuation function to call once the message
- * has been sent. Can be NULL if there is no
- * continuation to call.
+ * Defrag context for this mac endpoint
*/
- GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
+ struct GNUNET_DEFRAGMENT_Context * defrag;
/**
- * Cls for transmit_cont
+ * count of messages in the fragment out queue for this mac endpoint
*/
- void * transmit_cont_cls;
+ int fragment_messages_out_count;
+
+ //TODO DOXIGEN
+ uint8_t rate;
+ uint16_t tx_power;
+ uint8_t antenna;
/**
- * Timeout value for the pending message.
+ * Duplicates received
*/
- struct GNUNET_TIME_Absolute timeout;
+ int dups;
/**
- * Size of the message
+ * Fragments received
*/
- size_t message_size;
+ int fragc;
/**
- * pos in the message, for fragmentation/segmentation
+ * Acks received
*/
- size_t message_pos;
+ int acks;
};
-
/**
- * Header for messages which need fragmentation
+ * Struct for Messages in the fragment queue
*/
-struct FragmentationHeader
+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;
/**
- * number of message, to distinguish between the messages
+ * This is a doubly-linked list.
*/
-
- uint16_t message_num GNUNET_PACKED;
+ struct FragmentMessage *next;
/**
- * number of this fragment, for fragmentation/segmentation
+ * This is a doubly-linked list.
*/
- uint16_t fregment_num GNUNET_PACKED;
-
+ struct FragmentMessage *prev;
/**
- * number of fregments in this message
+ * Timeout value for the pending message.
*/
- uint16_t ack_message_num GNUNET_PACKED;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * number of this fragment, for fragmentation/segmentation
+ * Fragmentation context
*/
- uint16_t ack_fregment_num GNUNET_PACKED;
+ struct GNUNET_FRAGMENT_Context * fragcontext;
/**
- * Flags
- * 0x1 ack
- * 0x2 has data (not only ack)
- * 0x4 last fragment of message
- * 0x8 new message
+ * Fragment to send
*/
-
- uint32_t flags GNUNET_PACKED;
-
+ char * frag;
/**
- * checksum/error correction
+ * size of message
*/
+ size_t size;
- uint32_t crc GNUNET_PACKED;
+ /**
+ * 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 };
+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);
-int getRadiotapHeader (struct RadiotapHeader * Header);
-int getWlanHeader (struct IeeeHeader * Header);
-static int wlan_plugin_address_suggested (void *cls,
- const void *addr,
- size_t addrlen);
/**
- * get Session from address
+ * Generates a nice hexdump of a memory area.
*
+ * \param mem pointer to memory to dump
+ * \param length how many bytes to dump
*/
+void
+hexdump(void *mem, unsigned length)
+{
+ char line[80];
+ char *src = (char*) mem;
-//TODO add other possibilities to find the right session (are there other?)
-static struct Session *
-get_Session (struct Plugin *plugin,
- char * addr)
-{
- struct Sessionqueue * queue = plugin->all_Sessions;
- struct Sessionqueue * lastitem = NULL;
-
- while (queue != NULL){
- // content is never NULL
- GNUNET_assert (queue->content == NULL);
- char * addr2 = (queue->content)->addr;
- if (memcmp(addr, addr2, 6) == 0){
- //sesion found
- return queue->content;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
- }
- // new session
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
-
- if (plugin->all_Sessions == NULL){
- //is first session
- plugin->all_Sessions = queue;
- } else {
- lastitem->next = queue;
- queue->prev = lastitem;
- }
-
- queue->content = GNUNET_malloc (sizeof (struct Session));
- (queue->content)->plugin = plugin;
- memcpy((queue->content)->addr, addr, 6);
-
- //queue welcome
- struct WelcomeMessage welcome;
- struct PendingMessage *pm;
- pm = GNUNET_malloc (sizeof (struct PendingMessage) + sizeof (struct WelcomeMessage));
- pm->msg = (const char*) &pm[1];
- pm->message_size = sizeof (struct WelcomeMessage);
- welcome.header.size = htons (sizeof (struct WelcomeMessage));
- welcome.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_ADVERTISEMENT);
- welcome.clientIdentity = *plugin->env->my_identity;
- memcpy (&pm[1], &welcome, sizeof (welcome));
- pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
- GNUNET_CONTAINER_DLL_insert ((queue->content)->pending_messages_head,
- (queue->content)->pending_messages_tail,
- pm);
-
- return queue->content;
+ 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);
+ }
}
/**
- * Queue the session to send data
+ * Function to find a MacEndpoint with a specific mac addr
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the mac address
+ * @param create_new GNUNET_YES if a new end point should be created
+ * @return
*/
-
-static void
-queue_Session (struct Plugin *plugin,
- struct Session * session)
+static struct MacEndpoint *
+get_macendpoint(struct Plugin *plugin, const struct MacAddress *addr,
+ int create_new)
{
- struct Sessionqueue * queue = plugin->pending_Sessions;
- struct Sessionqueue * lastitem = NULL;
-
- while (queue != NULL){
- // content is never NULL
- GNUNET_assert (queue->content == NULL);
- // is session already in queue?
- if (session == queue->content){
- return;
- }
- // try next
- lastitem = queue;
- queue = queue->next;
- }
-
- // Session is not in the queue
-
- queue = GNUNET_malloc (sizeof (struct Sessionqueue));
- if (plugin->pending_Sessions == NULL){
- //is first session
- plugin->pending_Sessions = queue;
- } else {
- lastitem->next = queue;
- queue->prev = lastitem;
- }
+ 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;
+ }
- queue->content = session;
+ if (create_new == GNUNET_YES)
+ {
+ return create_macendpoint(plugin, addr);
+ }
+ else
+ {
+ return NULL;
+ }
}
-
/**
- * Function called to when wlan helper is ready to get some data
+ * search for a session with the addr and peer id
*
- * @param cls closure
- * @param GNUNET_SCHEDULER_TaskContext
+ * @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 void
-do_transmit (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+static struct Session *
+search_session(struct Plugin *plugin, const struct MacEndpoint * endpoint,
+ const struct GNUNET_PeerIdentity * peer)
{
- struct Plugin * plugin = cls;
- char * msg;
- ssize_t bytes;
-
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
+ GNUNET_assert(endpoint != NULL);
+ struct Sessionqueue * queue = endpoint->sessions_head;
+ while (queue != NULL)
+ {
+ GNUNET_assert (queue->content != NULL);
+ if (memcmp(peer, &queue->content->target,
+ sizeof(struct GNUNET_PeerIdentity)) == 0)
+ return queue->content; /* session found */
+ queue = queue->next;
+ }
+ return NULL;
+}
+
+/**
+ * Function called for a quick conversion of the binary address to
+ * a numeric address. Note that the caller must not free the
+ * address and that the next call to this function is allowed
+ * to override the address again.
+ *
+ * @param cls closure
+ * @param addr binary address
+ * @param addrlen length of the address
+ * @return string representing the same address
+ */
+static const char*
+wlan_plugin_address_to_string(void *cls, const void *addr, size_t addrlen)
+{
+ static char ret[40];
+ const struct MacAddress *mac;
+
+ if (addrlen != sizeof(struct MacAddress))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ mac = addr;
+ GNUNET_snprintf(ret, sizeof(ret), "%s Mac-Address %X:%X:%X:%X:%X:%X",
+ PROTOCOL_PREFIX, mac->mac[0], mac->mac[1], mac->mac[2], mac->mac[3],
+ mac->mac[4], mac->mac[5]);
+ return ret;
+}
+
+/**
+ * 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
+ */
+
+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);
+
+ 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;
+}
+
+/**
+ * Get session from address, create if no session exists
+ *
+ * @param plugin pointer to the plugin struct
+ * @param addr pointer to the mac address of the peer
+ * @param peer pointer to the peerid
+ * @return returns the session
+ */
+static struct Session *
+get_session(struct Plugin *plugin, const struct MacAddress *addr,
+ const struct GNUNET_PeerIdentity * peer)
+{
+ struct MacEndpoint * mac;
+ mac = get_macendpoint(plugin, addr, GNUNET_YES);
+ struct Session * session = search_session(plugin, mac, peer);
+
+ if (session != NULL)
+ return session;
+ return create_session(plugin, mac, peer);
+}
+
+/**
+ * Queue the session to send data
+ * checks if there is a message pending
+ * checks if this session is not allready in the queue
+ * @param plugin pointer to the plugin
+ * @param session pointer to the session to add
+ */
+static void
+queue_session(struct Plugin *plugin, struct Session * session)
+{
+ struct Sessionqueue * queue = plugin->pending_Sessions_head;
+
+ if (session->pending_message_head != NULL)
+ {
+ while (queue != NULL)
+ {
+ // content is never NULL
+ GNUNET_assert (queue->content != NULL);
+ // is session already in queue?
+ if (session == queue->content)
+ {
+ return;
+ }
+ // try next
+ queue = queue->next;
+ }
+
+ // Session is not in the queue
+
+ queue = GNUNET_malloc (sizeof (struct Sessionqueue));
+ queue->content = session;
+
+ //insert at the tail
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->pending_Sessions_head,
+ plugin->pending_Sessions_tail, queue);
+ plugin->pendingsessions++;
+ }
+
+}
+
+/**
+ * Function to schedule the write task, executed after a delay
+ * @param cls pointer to the plugin struct
+ * @param tc GNUNET_SCHEDULER_TaskContext pointer
+ */
+static void
+delay_fragment_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin * plugin = cls;
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
+
+ // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
+ if (plugin->server_write_task == GNUNET_SCHEDULER_NO_TASK)
+ {
+ plugin->server_write_task = GNUNET_SCHEDULER_add_write_file(
+ GNUNET_TIME_UNIT_FOREVER_REL, plugin->server_stdin_handle,
+ &do_transmit, plugin);
+ }
+}
+
+/**
+ * Function to calculate the time of the next periodic "hello-beacon"
+ * @param plugin pointer to the plugin struct
+ */
+
+static void
+set_next_beacon_time(struct Plugin * const plugin)
+{
+ //under 10 known peers: once a second
+ if (plugin->mac_count < 10)
+ {
+ plugin->beacon_time = GNUNET_TIME_absolute_add(
+ GNUNET_TIME_absolute_get(),
+ GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
+ 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));
+ }
+}
+
+/**
+ * Function to set the timer for the next timeout of the fragment queue
+ * @param plugin the handle to the plugin struct
+ */
+
+static void
+set_next_send(struct Plugin * const plugin)
+{
+ struct GNUNET_TIME_Relative next_send;
+
+ //cancel old task
+ if (plugin->server_write_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(plugin->server_write_delay_task);
+ plugin->server_write_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ //check if some acks are in the queue
+ if (plugin->ack_send_queue_head != NULL)
+ {
+ next_send = GNUNET_TIME_UNIT_ZERO;
+ }
+
+ //check if there are some fragments in the queue
+ else if (plugin->sending_messages_head != NULL)
+ {
+ next_send = GNUNET_TIME_UNIT_ZERO;
+ }
+ else
+ {
+ next_send = GNUNET_TIME_absolute_get_remaining(plugin->beacon_time);
+ }
+
+#if DEBUG_wlan
+
+ GNUNET_log(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 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 * queue;
+ struct Sessionqueue * sessionqueue;
+ struct Sessionqueue * sessionqueue_alt;
struct PendingMessage * pm;
- struct IeeeHeader * wlanheader;
- struct RadiotapHeader * RadioHeader;
+ 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
+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;
+
+ 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
+ }
+}
+
+/**
+ * function to fill the radiotap header
+ * @param plugin pointer to the plugin struct
+ * @param endpoint pointer to the endpoint
+ * @param header pointer to the radiotap header
+ * @return GNUNET_YES at success
+ */
+static int
+getRadiotapHeader(struct Plugin * plugin, struct MacEndpoint * endpoint,
+ struct Radiotap_Send * header)
+{
+
+ if (endpoint != NULL)
+ {
+ header->rate = endpoint->rate;
+ header->tx_power = endpoint->tx_power;
+ header->antenna = endpoint->antenna;
+ }
+ else
+ {
+ header->rate = 255;
+ header->tx_power = 0;
+ header->antenna = 0;
+ }
+
+ return GNUNET_YES;
+}
+
+/**
+ * function to generate the wlan hardware header for one packet
+ * @param Header address to write the header to
+ * @param to_mac_addr address of the recipient
+ * @param plugin pointer to the plugin struct
+ * @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
+ *
+ * @param msgbuf pointer tor the data
+ * @param msgbuf_size size of the data
+ *
+ * @return 32bit crc value
+ */
+
+uint32_t
+getcrc32(const char *msgbuf, size_t msgbuf_size)
+{
+
+ return GNUNET_CRYPTO_crc32_n(msgbuf, msgbuf_size);;
+}
+
+/**
+ * 16bit CRC
+ *
+ * @param msgbuf pointer tor the data
+ * @param msgbuf_size size of the data
+ *
+ * @return 16bit crc value
+ */
+
+uint16_t
+getcrc16(const char *msgbuf, size_t msgbuf_size)
+{
+ //TODO calc some crc
+ return 0;
+}
+
+/**
+ * function to add a fragment of a message to send
+ * @param cls FragmentMessage this message belongs to
+ * @param hdr pointer to the start of the message
+ */
+
+void
+add_message_for_send(void *cls, const struct GNUNET_MessageHeader *hdr)
+{
+
+ struct FragmentMessage * fm = cls;
+ struct FragmentMessage_queue * fmqueue;
+
+ GNUNET_assert(cls != NULL);
+ GNUNET_assert(fm->frag == NULL);
+ struct MacEndpoint * endpoint = fm->session->mac;
+ struct Plugin * plugin = endpoint->plugin;
struct GNUNET_MessageHeader * msgheader;
- uint16_t size = 0;
+ struct GNUNET_MessageHeader * msgheader2;
+ uint16_t size;
- queue = plugin->pending_Sessions;
+#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
- //check if the are some pending sessions/messages ...
- GNUNET_assert(queue != NULL);
+ size = sizeof(struct GNUNET_MessageHeader) + sizeof(struct Radiotap_Send)
+ + sizeof(struct ieee80211_frame) + ntohs(hdr->size);
+ fm->frag = GNUNET_malloc(size);
+ fm->size = size;
- session = queue->content;
- GNUNET_assert(session != NULL);
+ msgheader = (struct GNUNET_MessageHeader *) fm->frag;
+ msgheader->size = htons(size);
+ msgheader->type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
- pm = session->pending_messages_head;
- GNUNET_assert(pm != NULL);
+ fm->radioHeader = (struct Radiotap_Send*) &msgheader[1];
+ fm->ieeewlanheader = (struct ieee80211_frame*) &fm->radioHeader[1];
+ msgheader2 = (struct GNUNET_MessageHeader*) &fm->ieeewlanheader[1];
+ memcpy(msgheader2, hdr, ntohs(hdr->size));
- //check if msg is valid to send
- if (GNUNET_TIME_absolute_get_remaining(pm->timeout).value > 0){
- // fixme split msg if to large
+ fmqueue = GNUNET_malloc(sizeof(struct FragmentMessage_queue));
+ fmqueue->content = fm;
- //increment one, this is a new message
- session->message_num_out ++;
- // fixme peer id is needed in each packet
- size = pm->message_size + sizeof(struct RadiotapHeader)
- + sizeof(struct IeeeHeader) + sizeof(struct GNUNET_MessageHeader)
- + sizeof(struct FragmentationHeader);
- msg = GNUNET_malloc(size);
+ GNUNET_CONTAINER_DLL_insert_tail(plugin->sending_messages_head,
+ plugin->sending_messages_tail, fmqueue);
+ set_next_send(plugin);
+}
- msgheader = msg;
- msgheader->size = pm->message_size + sizeof(struct RadiotapHeader) + sizeof(struct IeeeHeader);
- msgheader->type = GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA;
+/**
+ * function to send a hallo beacon
+ * @param plugin pointer to the plugin struct
+ */
+static void
+send_hello_beacon(struct Plugin * plugin)
+{
- RadioHeader = &msgheader[1];
- getRadiotapHeader(RadioHeader);
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending hello beacon\n");
+#endif
- wlanheader = &RadioHeader[1];
- getWlanHeader(wlanheader);
+ 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;
- bytes = GNUNET_DISK_file_write(plugin->server_stdin_handle, msg, size);
- } else {
- //remove message
- GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail,
- pm);
- GNUNET_free(pm->msg);
- GNUNET_free(pm);
+ 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 < 1)
+ 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);
- //plugin->server_read_task =
- //GNUNET_SCHEDULER_add_read_file (plugin->env->sched,
- // GNUNET_TIME_UNIT_FOREVER_REL,
- // plugin->server_stdout_handle, &wlan_plugin_helper_read, plugin);
+ if (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");
}
/**
- * If we have pending messages, ask the server to
- * transmit them (schedule the respective tasks, etc.)
+ * 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 Plugin env to get everything needed
+ * @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 void
-process_pending_messages (struct Plugin * plugin)
+static int
+wlan_plugin_address_suggested(void *cls, const void *addr, size_t addrlen)
{
- struct Sessionqueue * queue;
- struct Session * session;
-
- if (plugin->pending_Sessions == NULL)
- return;
+ //struct Plugin *plugin = cls;
- queue = plugin->pending_Sessions;
- //contet should not be empty
- GNUNET_assert(queue->content != NULL);
+ /* check if the address is plausible; if so,
+ add it to our list! */
- session = queue->content;
- //pending sessions should have some msg
- GNUNET_assert(session->pending_messages_head != NULL);
+ 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;
+ }
- // GNUNET_TIME_UNIT_FOREVER_REL is needed to clean up old msg
- plugin->server_write_task
- = GNUNET_SCHEDULER_add_write_file(plugin->env->sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdin_handle,
- &do_transmit,
- plugin);
+ return GNUNET_SYSERR;
}
-
-
/**
* Function that can be used by the transport service to transmit
* a message using the plugin.
* @param priority how important is the message
* @param msgbuf the message to transmit
* @param msgbuf_size number of bytes in 'msgbuf'
- * @param timeout when should we time out
+ * @param timeout when should we time out
* @param session which session must be used (or NULL for "any")
* @param addr the address to use (can be NULL if the plugin
* is "on its own" (i.e. re-use existing TCP connection))
* and does NOT mean that the message was not transmitted (DV)
*/
static ssize_t
-wlan_plugin_send (void *cls,
- const struct GNUNET_PeerIdentity * target,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative timeout,
- struct Session *session,
- const void *addr,
- size_t addrlen,
- int force_address,
- GNUNET_TRANSPORT_TransmitContinuation cont,
- void *cont_cls)
-{
- int bytes_sent = 0;
- char * msg;
-
+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 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
+ //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);
- //copy msg to buffer, not fragmented / segmented yet
- memcpy(newmsg->msg, msgbuf, msgbuf_size);
+ 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->message_pos = 0;
- newmsg->message_size = msgbuf_size;
- newmsg->next = NULL;
- //check if queue is empty
- struct PendingMessage * tailmsg;
- tailmsg = session->pending_messages_tail;
+ newmsg->timeout.abs_value = newmsg->timeout.abs_value - 500;
+
+ newmsg->message_size = msgbuf_size + sizeof(struct WlanHeader);
- //new tail is the new msg
- session->pending_messages_tail = newmsg;
- newmsg->prev = tailmsg;
+ GNUNET_CONTAINER_DLL_insert_tail(session->pending_message_head, session->pending_message_tail, newmsg);
- //test if tail was not NULL (queue is empty)
- if (tailmsg == NULL){
- // head should be NULL too
- GNUNET_assert(session->pending_messages_head == NULL);
+#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
- session->pending_messages_head = newmsg;
+ //queue session
+ queue_session(plugin, session);
- } else {
- //next at the tail should be NULL
- GNUNET_assert(tailmsg->next == NULL);
+ check_fragment_queue(plugin);
+ //FIXME not the correct size
+ return msgbuf_size;
- //queue the msg
- tailmsg->next = newmsg;
- }
+}
- process_pending_messages(plugin);
+/**
+ * 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;
+ }
- //FIXME not the correct size
- return msgbuf_size;
+ 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
* @param target peer from which to disconnect
*/
static void
-wlan_plugin_disconnect (void *cls,
- const struct GNUNET_PeerIdentity *target)
+wlan_plugin_disconnect(void *cls, const struct GNUNET_PeerIdentity *target)
{
- // struct Plugin *plugin = cls;
- // FIXME
+ struct Plugin *plugin = cls;
+ struct Sessionqueue * queue;
+ struct Sessionqueue * queue_next;
+ struct MacEndpoint * endpoint = plugin->mac_head;
+ struct MacEndpoint * endpoint_next;
+ // just look at all the session for the needed one
+ while (endpoint != NULL)
+ {
+ queue = endpoint->sessions_head;
+ endpoint_next = endpoint->next;
+ while (queue != NULL)
+ {
+ // content is never NULL
+ GNUNET_assert (queue->content != NULL);
+ queue_next = queue->next;
+ if (memcmp(target, &(queue->content->target),
+ sizeof(struct GNUNET_PeerIdentity)) == 0)
+ {
+ free_session(plugin, queue, GNUNET_YES);
+ }
+ // try next
+ queue = queue_next;
+ }
+ endpoint = endpoint_next;
+ }
}
-
/**
* Convert the transports address to a nice, human-readable
* format.
* @param asc_cls closure for asc
*/
static void
-wlan_plugin_address_pretty_printer (void *cls,
- const char *type,
- const void *addr,
- size_t addrlen,
- int numeric,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_TRANSPORT_AddressStringCallback
- asc, void *asc_cls)
+wlan_plugin_address_pretty_printer(void *cls, const char *type,
+ const void *addr, size_t addrlen, int numeric,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_AddressStringCallback asc, void *asc_cls)
{
char ret[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 int
-wlan_plugin_address_suggested (void *cls,
- const void *addr,
- size_t addrlen)
+static void
+wlan_data_message_handler(void *cls, const struct GNUNET_MessageHeader *hdr)
{
- /* struct Plugin *plugin = cls; */
+ 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;
- /* check if the address is plausible; if so,
- add it to our list! */
+ if (ntohs(hdr->type) == GNUNET_MESSAGE_TYPE_WLAN_DATA)
+ {
- GNUNET_assert(cls !=NULL);
+#if DEBUG_wlan
+ GNUNET_log(
+ GNUNET_ERROR_TYPE_DEBUG,
+ "Func wlan_data_message_handler got GNUNET_MESSAGE_TYPE_WLAN_DATA size: %u\n",
+ ntohs(hdr->size));
+#endif
- //Mac Adress has 6 bytes
- if (addrlen == 6){
- /* TODO check for bad addresses like milticast, broadcast, etc */
- return GNUNET_OK;
- } else {
- return GNUNET_SYSERR;
- }
+ if (ntohs(hdr->size) < sizeof(struct WlanHeader)
+ + sizeof(struct GNUNET_MessageHeader))
+ {
+ //packet not big enought
+ return;
+ }
+
+ 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;
+ }
- 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;
+ }
+ 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;
+}
-#if 1
/**
* 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
*/
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){
- 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]; //max size of packet from helper
- ssize_t bytes;
- //memset(&mybuf, 0, sizeof(mybuf)); //?
+ 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;
- if (bytes < 1)
+ 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->suid_tokenizer, NULL, mybuf, bytes,
+ GNUNET_NO, GNUNET_NO);
- GNUNET_SERVER_mst_receive(plugin->consoltoken,NULL,&mybuf,bytes,0, 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_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;
+ 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_pid = GNUNET_OS_start_process(plugin->server_stdin, plugin->server_stdout, "gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", plugin->interface, NULL);
- if (plugin->server_pid == GNUNET_SYSERR)
+
+ if (testmode == 0)
{
-#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,
+ "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_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 (plugin->env->sched,
- 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.
* @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->sched, 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);
+
+ plugin->suid_tokenizer = GNUNET_SERVER_mst_create(&wlan_process_helper,
+ plugin);
- wlan_transport_start_wlan_helper(plugin);
- plugin->consoltoken = GNUNET_SERVER_mst_create(&wlan_process_helper,plugin);
+ plugin->data_tokenizer = GNUNET_SERVER_mst_create(&process_data, plugin);
- //plugin->all_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
- //plugin->pending_Sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
+ //plugin->sessions = GNUNET_malloc (sizeof (struct Sessionqueue));
+ //plugin->pending_Sessions_head = GNUNET_malloc (sizeof (struct Sessionqueue));
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->cls = plugin;
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
- return api;
-}
+ 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
+ }
+ 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;
+ }
+ }
-/**
- * Exit point from the plugin.
- */
-void *
-gnunet_plugin_transport_wlan_done (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
+ //start the plugin
+ set_next_beacon_time(plugin);
- GNUNET_assert(cls !=NULL);
+ wlan_transport_start_wlan_helper(plugin, testmode);
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
+#if DEBUG_wlan
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "wlan init finished\n");
+#endif
+
+ return api;
}
/* end of plugin_transport_wlan.c */
projects / oweals / gnunet.git / blobdiff