Source/charon/packet.c

   1 /**
   2  * @file packet.h
   3  *
   4  * @brief UDP-Packet, contains data, sender and receiver
   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 "packet.h"
  24
  25
  26 static status_t destroy(packet_t *this)
  27 {
  28         pfree(this->data.ptr);
  29         pfree(this);
  30         return SUCCESS;
  31 }
  32
  33 /**
  34  * @brief helper function to set address used by set_dest & set_source
  35  */
  36 static status_t set_addr(int family, struct sockaddr *saddr, char *address, u_int16_t port)
  37 {
  38         switch (family)
  39         {
  40                 /* IPv4 */
  41                 case AF_INET:
  42                         {
  43                                 struct sockaddr_in *sin = (struct sockaddr_in*)saddr;
  44                                 sin->sin_family = AF_INET;
  45                                 sin->sin_addr.s_addr = inet_addr("127.0.0.1");
  46                                 sin->sin_port = htons(port);
  47                                 return SUCCESS;;
  48                         }
  49         }
  50         return NOT_SUPPORTED;
  51 }
  52
  53 status_t set_destination(packet_t *this, char *address, u_int16_t port)
  54 {
  55         struct sockaddr *saddr = &(this->destination);
  56         return set_addr(this->family, saddr, address, port);
  57 }
  58
  59 status_t set_source(packet_t *this, char *address, u_int16_t port)
  60 {
  61         struct sockaddr *saddr = &(this->source);
  62         return set_addr(this->family, saddr, address, port);
  63 }
  64
  65
  66 packet_t *packet_create(int family)
  67 {
  68         packet_t *this = alloc_thing(packet_t, "packet_t");
  69
  70         this->destroy = destroy;
  71         this->set_destination = set_destination;
  72         this->set_source = set_source;
  73
  74         this->family = family;
  75         switch (family)
  76         {
  77                 case AF_INET:
  78                         this->sockaddr_len = sizeof(struct sockaddr_in);
  79                         break;
  80                 default: /* not supported */
  81                         pfree(this);
  82                         return NULL;
  83         }
  84
  85         this->data.len = 0;
  86         this->data.ptr = NULL;
  87         return this;
  88 }