126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*
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* Copyright (C) 2009 Mamadou Diop.
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*
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* Contact: Mamadou Diop <diopmamadou@yahoo.fr>
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DOUBANGO.
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*
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*/
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/**@file tnet_dhcp_option_sip4.c
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* @brief Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for
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* Session Initiation Protocol (SIP) Servers as per RFC 3361.
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*
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* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
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*
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* @date Created: Sat Nov 8 16:54:58 2009 mdiop
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*/
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#include "tnet_dhcp_option_sip4.h"
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#include "dns/tnet_dns_rr.h"
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#include "tnet_types.h"
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#include "tsk_memory.h"
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#include "tsk_string.h"
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//
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// [[DHCP SIP4]] object definition
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//
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static void* tnet_dhcp_option_sip4_create(void * self, va_list * app)
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{
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tnet_dhcp_option_sip4_t *option = self;
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if(option)
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{
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const void* payload = va_arg(*app, const void*);
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size_t payload_size = va_arg(*app, size_t);
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const uint8_t* payloadPtr = (const uint8_t*)payload;
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const uint8_t* payloadEnd = (payloadPtr + payload_size);
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/* init base */
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tnet_dhcp_option_init(TNET_DHCP_OPTION(option), dhcp_code_SIP_Servers_DHCP_Option);
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option->servers = TSK_LIST_CREATE();
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/* Set values as per RFC 3361. */
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if(*payloadPtr == 0){ /* enc=0 */
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/*
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+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
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|120|27 | 0 | 7 |'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'c'|'o'|'m'| 0 |
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+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
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+---+---+---+---+---+---+---+---+---+---+---+---+---+ | 7
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|'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'n'|'e'|'t'| 0 | +---+---+---
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+---+---+---+---+---+---+---+---+---+---+
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*/
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size_t offset = 1;
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char* server = 0;
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payloadPtr++;
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while((payloadPtr < payloadEnd) && !tnet_dns_rr_qname_deserialize(payload, (payloadEnd - payloadPtr), &server, &offset))
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{
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tsk_string_t* string = TSK_STRING_CREATE(server);
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tsk_list_push_back_data(option->servers, (void*)&string);
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TSK_FREE(server);
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payloadPtr += offset;
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}
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}
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else{
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/*
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Code Len enc Address 1 Address 2
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+-----+-----+-----+-----+-----+-----+-----+-----+--
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| 120 | n | 1 | a1 | a2 | a3 | a4 | a1 | ...
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+-----+-----+-----+-----+-----+-----+-----+-----+--
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*/
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uint32_t address;
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tsk_string_t* addrstring;
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char* ip4 = 0;
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while(payloadPtr < payloadEnd){
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address = ntohl(*((uint32_t*)++payloadPtr));
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tsk_sprintf(&ip4, "%u.%u.%u.%u", (address>>24)&0xFF, (address>>16)&0xFF, (address>>8)&0xFF, (address>>0)&0xFF);
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addrstring = TSK_STRING_CREATE(ip4);
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tsk_list_push_back_data(option->servers, (void*)&addrstring);
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TSK_FREE(ip4);
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payloadPtr+= 4;
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}
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}
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}
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return self;
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}
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static void* tnet_dhcp_option_sip4_destroy(void * self)
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{
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tnet_dhcp_option_sip4_t *option = self;
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if(option)
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{
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/* deinit base */
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tnet_dhcp_option_deinit(TNET_DHCP_OPTION(option));
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}
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return self;
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}
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static const tsk_object_def_t tnet_dhcp_option_sip4_def_s =
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{
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sizeof(tnet_dhcp_option_sip4_t),
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tnet_dhcp_option_sip4_create,
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tnet_dhcp_option_sip4_destroy,
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0,
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};
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const void *tnet_dhcp_option_sip4_def_t = &tnet_dhcp_option_sip4_def_s;
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