114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/*
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* coap-common.c
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*
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* Created on: Aug 30, 2010
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* Author: dogan
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*/
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#ifdef CONTIKI_TARGET_NETSIM
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#include <stdio.h>
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#include <iostream>
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#include <cstring>
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#include <cstdlib>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#else
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#include "contiki.h"
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#include "contiki-net.h"
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#include <string.h>
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#endif
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#include "coap-common.h"
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
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#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",(lladdr)->addr[0], (lladdr)->addr[1], (lladdr)->addr[2], (lladdr)->addr[3],(lladdr)->addr[4], (lladdr)->addr[5])
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#else
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#define PRINTF(...)
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#define PRINT6ADDR(addr)
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#define PRINTLLADDR(addr)
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#endif
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void init_packet(coap_packet_t* packet)
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{
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packet->ver = 1;
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packet->type = 0;
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packet->option_count = 0;
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packet->code = 0;
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packet->tid = 0;
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packet->options = NULL;
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packet->url = NULL;
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packet->url_len = 0;
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packet->query = NULL;
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packet->query_len = 0;
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packet->payload = NULL;
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packet->payload_len = 0;
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}
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int serialize_packet(coap_packet_t* packet, uint8_t* buffer)
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{
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int index = 0;
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header_option_t* option = NULL;
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uint16_t option_delta = 0;
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buffer[0] = (packet->ver) << COAP_HEADER_VERSION_POSITION;
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buffer[0] |= (packet->type) << COAP_HEADER_TYPE_POSITION;
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buffer[0] |= packet->option_count;
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buffer[1] = packet->code;
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uint16_t temp = uip_htons(packet->tid);
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memcpy(
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(void*)&buffer[2],
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(void*)(&temp),
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sizeof(packet->tid));
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index += 4;
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PRINTF("serialize option_count %u\n", packet->option_count);
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/*Options should be sorted beforehand*/
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for (option = packet->options ; option ; option = option->next){
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uint16_t delta = option->option - option_delta;
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if ( !delta ){
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PRINTF("WARNING: Delta==Zero\n");
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}
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buffer[index] = (delta) << COAP_HEADER_OPTION_DELTA_POSITION;
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PRINTF("option %u len %u option diff %u option_value addr %x option addr %x next option addr %x", option->option, option->len, option->option - option_delta, (unsigned int) option->value, (unsigned int)option, (unsigned int)option->next);
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int i = 0;
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for ( ; i < option->len ; i++ ){
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PRINTF(" (%u)", option->value[i]);
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}
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PRINTF("\n");
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if (option->len < 0xF){
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buffer[index] |= option->len;
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index++;
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} else{
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buffer[index] |= (0xF); //1111
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buffer[index + 1] = option->len - (0xF);
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index += 2;
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}
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memcpy((char*)&buffer[index], option->value, option->len);
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index += option->len;
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option_delta += option->option;
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}
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if(packet->payload){
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memcpy(&buffer[index], packet->payload, packet->payload_len);
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index += packet->payload_len;
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}
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return index;
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}
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