Source/charon/sender.c

   1 /**
   2  * @file sender.c
   3  *
   4  * @brief Implements the Sender Thread encapsulated in the sender_t object
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2005 Jan Hutter, Martin Willi
  10  * Hochschule fuer Technik Rapperswil
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <pthread.h>
  25
  26 #include "sender.h"
  27
  28 #include <globals.h>
  29 #include <network/socket.h>
  30 #include <network/packet.h>
  31 #include <queues/send_queue.h>
  32 #include <utils/allocator.h>
  33 #include <utils/logger_manager.h>
  34
  35 /**
  36  * Private data of a sender object
  37  */
  38 typedef struct private_sender_s private_sender_t;
  39
  40 struct private_sender_s {
  41         /**
  42          * Public part of a sender object
  43          */
  44          sender_t public;
  45
  46          /**
  47           * Assigned thread to the sender_t object
  48           */
  49          pthread_t assigned_thread;
  50
  51          /**
  52           * logger for this sender
  53           */
  54          logger_t *logger;
  55
  56 };
  57
  58 /**
  59  * Thread function started at creation of the sender object
  60  *
  61  * @param this assigned sender object
  62  * @return SUCCESS if thread_function ended successfully, FAILED otherwise
  63  */
  64 static void sender_thread_function(private_sender_t * this)
  65 {
  66         packet_t * current_packet;
  67         status_t status;
  68
  69         /* cancellation disabled by default */
  70         pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
  71
  72         while (1)
  73         {
  74                 while (global_send_queue->get(global_send_queue,&current_packet) == SUCCESS)
  75                 {
  76                         this->logger->log(this->logger, CONTROL|MORE, "got a packet, sending it");
  77                         status = global_socket->send(global_socket,current_packet);
  78                         if (status != SUCCESS)
  79                         {
  80                                 this->logger->log(this->logger, ERROR, "sending failed, socket returned %s",
  81                                                                         mapping_find(status_m, status));
  82                         }
  83                         current_packet->destroy(current_packet);
  84                 }
  85         }
  86 }
  87
  88 /**
  89  * Implementation of sender_t's destroy function
  90  */
  91 static status_t destroy(private_sender_t *this)
  92 {
  93         this->logger->log(this->logger, CONTROL | MORE, "Going to terminate sender thread");
  94         pthread_cancel(this->assigned_thread);
  95
  96         pthread_join(this->assigned_thread, NULL);
  97         this->logger->log(this->logger, CONTROL | MORE, "Sender thread terminated");
  98
  99         global_logger_manager->destroy_logger(global_logger_manager, this->logger);
 100
 101         allocator_free(this);
 102         return SUCCESS;
 103 }
 104
 105
 106 sender_t * sender_create()
 107 {
 108         private_sender_t *this = allocator_alloc_thing(private_sender_t);
 109
 110         this->public.destroy = (status_t(*)(sender_t*)) destroy;
 111
 112         this->logger = global_logger_manager->create_logger(global_logger_manager, SENDER, NULL);
 113         if (this->logger == NULL)
 114         {
 115                 allocator_free(this);
 116                 return NULL;
 117         }
 118
 119         if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))sender_thread_function, this) != 0)
 120         {
 121                 /* thread could not be created  */
 122                 allocator_free(this);
 123                 return NULL;
 124         }
 125
 126         return &(this->public);
 127 }