programs/charon/charon/threads/receiver.c

   1 /**
   2  * @file receiver.c
   3  *
   4  * @brief Implementation of receiver_t.
   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 <daemon.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 <queues/jobs/incoming_packet_job.h>
  34 #include <utils/logger_manager.h>
  35
  36
  37 typedef struct private_receiver_t private_receiver_t;
  38
  39 /**
  40  * Private data of a receiver_t object.
  41  */
  42 struct private_receiver_t {
  43         /**
  44          * Public part of a receiver_t object.
  45          */
  46          receiver_t public;
  47
  48          /**
  49           * @brief Thread function started at creation of the receiver object.
  50           *
  51           * @param this         calling object
  52           */
  53          void (*receive_packets) (private_receiver_t *this);
  54
  55          /**
  56           * Assigned thread.
  57           */
  58          pthread_t assigned_thread;
  59
  60          /**
  61           * A logger for the receiver_t object.
  62           */
  63          logger_t *logger;
  64 };
  65
  66 /**
  67  * Implementation of receiver_t.receive_packets.
  68  */
  69 static void receive_packets(private_receiver_t * this)
  70 {
  71         packet_t * current_packet;
  72         job_t *current_job;
  73
  74         /* cancellation disabled by default */
  75         pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
  76
  77         this->logger->log(this->logger, CONTROL, "Receiver thread running, thread_id %u", (int)pthread_self());
  78
  79         while (1)
  80         {
  81                 while (charon->socket->receive(charon->socket,&current_packet) == SUCCESS)
  82                 {
  83                         this->logger->log(this->logger, CONTROL | LEVEL1, "Creating job from packet");
  84                         current_job = (job_t *) incoming_packet_job_create(current_packet);
  85
  86                         charon->job_queue->add(charon->job_queue,current_job);
  87
  88                 }
  89                 /* bad bad, rebuild the socket ? */
  90                 this->logger->log(this->logger, ERROR, "Receiving from socket failed!");
  91         }
  92 }
  93
  94 /**
  95  * Implementation of receiver_t.destroy.
  96  */
  97 static void destroy(private_receiver_t *this)
  98 {
  99         this->logger->log(this->logger, CONTROL | LEVEL1, "Going to terminate receiver thread");
 100         pthread_cancel(this->assigned_thread);
 101
 102         pthread_join(this->assigned_thread, NULL);
 103         this->logger->log(this->logger, CONTROL | LEVEL1, "Receiver thread terminated");
 104
 105         free(this);
 106 }
 107
 108 /*
 109  * Described in header.
 110  */
 111 receiver_t * receiver_create()
 112 {
 113         private_receiver_t *this = malloc_thing(private_receiver_t);
 114
 115         this->public.destroy = (void(*)(receiver_t*)) destroy;
 116         this->receive_packets = receive_packets;
 117
 118         this->logger = logger_manager->get_logger(logger_manager, RECEIVER);
 119
 120         if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))this->receive_packets, this) != 0)
 121         {
 122                 this->logger->log(this->logger, ERROR, "Receiver thread could not be started");
 123                 free(this);
 124                 charon->kill(charon, "Unable to create receiver thread");
 125         }
 126
 127         return &(this->public);
 128 }