Source/charon/receiver.c

   1 /**
   2  * @file receiver.c
   3  *
   4  * @brief Implements the Receiver Thread encapsulated in the receiver_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 "receiver.h"
  27
  28 #include <globals.h>
  29 #include <network/socket.h>
  30 #include <network/packet.h>
  31 #include <queues/job_queue.h>
  32 #include <queues/jobs/job.h>
  33 #include <utils/allocator.h>
  34 #include <utils/logger_manager.h>
  35
  36 /**
  37  * Private data of a receiver object
  38  */
  39 typedef struct private_receiver_s private_receiver_t;
  40
  41 struct private_receiver_s {
  42         /**
  43          * Public part of a receiver object
  44          */
  45          receiver_t public;
  46
  47          /**
  48           * Assigned thread to the receiver_t object
  49           */
  50          pthread_t assigned_thread;
  51          /**
  52           * logger for the receiver
  53           */
  54          logger_t *logger;
  55
  56
  57 };
  58
  59 /**
  60  * Thread function started at creation of the receiver object
  61  *
  62  * @param this assigned receiver object
  63  * @return SUCCESS if thread_function ended successfully, FAILED otherwise
  64  */
  65 static void receiver_thread_function(private_receiver_t * this)
  66 {
  67         packet_t * current_packet;
  68         job_t *current_job;
  69         /* cancellation disabled by default */
  70         pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
  71         while (1)
  72         {
  73                 while (global_socket->receive(global_socket,&current_packet) == SUCCESS)
  74                 {
  75                         this->logger->log(this->logger, CONTROL, "creating job from packet");
  76                         current_job = (job_t *) incoming_packet_job_create(current_packet);
  77                         if (current_job == NULL)
  78                         {
  79                                 this->logger->log(this->logger, ERROR, "job creation failed");
  80                         }
  81
  82                         if (global_job_queue->add(global_job_queue,current_job) != SUCCESS)
  83                         {
  84                                 this->logger->log(this->logger, ERROR, "job queueing failed");
  85                         }
  86
  87                 }
  88                 /* bad bad, rebuild the socket ? */
  89                 this->logger->log(this->logger, ERROR, "receiving from socket failed!");
  90         }
  91 }
  92
  93 /**
  94  * Implementation of receiver_t's destroy function
  95  */
  96 static status_t destroy(private_receiver_t *this)
  97 {
  98         this->logger->log(this->logger, CONTROL | MORE, "Going to terminate receiver thread");
  99         pthread_cancel(this->assigned_thread);
 100
 101         pthread_join(this->assigned_thread, NULL);
 102         this->logger->log(this->logger, CONTROL | MORE, "Receiver thread terminated");
 103
 104         global_logger_manager->destroy_logger(global_logger_manager, this->logger);
 105
 106         allocator_free(this);
 107         return SUCCESS;
 108 }
 109
 110
 111 receiver_t * receiver_create()
 112 {
 113         private_receiver_t *this = allocator_alloc_thing(private_receiver_t);
 114
 115         this->public.destroy = (status_t(*)(receiver_t*)) destroy;
 116
 117         this->logger = global_logger_manager->create_logger(global_logger_manager, RECEIVER, NULL);
 118         if (this->logger == NULL)
 119         {
 120                 allocator_free(this);
 121         }
 122
 123         if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))receiver_thread_function, this) != 0)
 124         {
 125                 /* thread could not be created  */
 126                 global_logger_manager->destroy_logger(global_logger_manager, this->logger);
 127                 allocator_free(this);
 128                 return NULL;
 129         }
 130
 131         return &(this->public);
 132 }