1156 lines
38 KiB
C
1156 lines
38 KiB
C
/*
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* Copyright (c) 2012, Institute for Pervasive Computing, ETH Zurich
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* An implementation of the Constrained Application Protocol (draft 12)
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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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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#include <stdio.h>
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#include "er-coap-12.h"
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#include "er-coap-12-transactions.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]", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_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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/*-----------------------------------------------------------------------------------*/
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/*- Variables -----------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------------*/
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static struct uip_udp_conn *udp_conn = NULL;
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static uint16_t current_mid = 0;
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coap_status_t coap_error_code = NO_ERROR;
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char *coap_error_message = "";
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/*-----------------------------------------------------------------------------------*/
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/*- LOCAL HELP FUNCTIONS ------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------------*/
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static
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uint16_t
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coap_log_2(uint16_t value)
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{
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uint16_t result = 0;
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do {
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value = value >> 1;
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result++;
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} while (value);
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return result ? result - 1 : result;
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}
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/*-----------------------------------------------------------------------------------*/
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static
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uint32_t
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coap_parse_int_option(uint8_t *bytes, uint16_t length)
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{
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uint32_t var = 0;
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int i = 0;
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while (i<length)
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{
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var <<= 8;
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var |= 0xFF & bytes[i++];
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}
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return var;
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}
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/*-----------------------------------------------------------------------------------*/
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static
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size_t
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coap_set_option_header(int delta, size_t length, uint8_t *buffer)
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{
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if (length<15)
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{
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PRINTF("Option len: %u\n", delta);
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buffer[0] = (0x0F & length) | (0xF0 & delta<<4);
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return 1;
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}
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else
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{
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PRINTF("Option len: 15");
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/* WARNING: no extra check for maximum length, know what you are doing */
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uint8_t size = 0;
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buffer[0] = 0x0F | (0xF0 & delta<<4);
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length -= 15;
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while (length > 254)
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{
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PRINTF("+255");
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buffer[++size] = 0xFF;
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length -= 255;
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}
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PRINTF("+%u\n", length);
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buffer[++size] = 0xFF & length;
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return ++size;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static
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size_t
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coap_insert_option_jump(unsigned int number, unsigned int *current_number, uint8_t *buffer)
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{
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unsigned int delta = number-*current_number;
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if (delta < 15)
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{
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return 0;
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}
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else if (delta < 30)
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{
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buffer[0] = 0xF1;
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*current_number += 15;
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PRINTF("OPTION JUMP 1: 15\n");
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return 1;
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}
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else if (delta < 2064)
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{
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buffer[0] = 0xF2;
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buffer[1] = ((delta/8)-2);
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*current_number += buffer[1];
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PRINTF("OPTION JUMP 2: %u\n", buffer[1]);
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return 2;
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}
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else /* no upper bound check as delta is 16 bit */
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{
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buffer[0] = 0xF3;
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delta = ((delta/8)-258);
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buffer[1] = delta>>8;
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buffer[2] = 0xFF & delta;
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*current_number += delta;
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PRINTF("OPTION JUMP 3: %u\n", delta);
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return 3;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static
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size_t
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coap_serialize_int_option(unsigned int number, unsigned int current_number, uint8_t *buffer, uint32_t value)
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{
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/* Insert jumps for large deltas */
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size_t i = coap_insert_option_jump(number, ¤t_number, buffer);
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size_t start_i = i;
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uint8_t *option = &buffer[i];
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if (0xFF000000 & value) buffer[++i] = (uint8_t) (0xFF & value>>24);
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if (0xFFFF0000 & value) buffer[++i] = (uint8_t) (0xFF & value>>16);
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if (0xFFFFFF00 & value) buffer[++i] = (uint8_t) (0xFF & value>>8);
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if (0xFFFFFFFF & value) buffer[++i] = (uint8_t) (0xFF & value);
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i += coap_set_option_header(number - current_number, i-start_i, option);
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PRINTF("OPTION type %u, delta %u, len %u\n", number, number - current_number, i-start_i);
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return i;
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* Pass the char to split the string at in split_option and receive the number of options in split_option on return.
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*/
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static
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size_t
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coap_serialize_array_option(unsigned int number, unsigned int current_number, uint8_t *buffer, uint8_t *array, size_t length, uint8_t *split_option)
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{
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/* Insert jumps for large deltas */
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size_t i = coap_insert_option_jump(number, ¤t_number, buffer);
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if (*split_option!='\0')
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{
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int j;
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uint8_t *part_start = array;
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uint8_t *part_end = NULL;
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size_t temp_length;
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char split_char = *split_option;
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*split_option = 0; /* Ensure reflecting the created option count */
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for (j = 0; j<=length; ++j)
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{
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if (array[j]==split_char || j==length)
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{
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part_end = array + j;
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temp_length = part_end-part_start;
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i += coap_set_option_header(number - current_number, temp_length, &buffer[i]);
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memcpy(&buffer[i], part_start, temp_length);
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i += temp_length;
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PRINTF("OPTION type %u, delta %u, len %u, part [%.*s]\n", number, number - current_number, i, temp_length, part_start);
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++(*split_option);
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++j; /* skip the slash */
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current_number = number;
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while( array[j]=='/') ++j;
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part_start = array + j;
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}
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} /* for */
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}
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else
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{
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i += coap_set_option_header(number - current_number, length, &buffer[i]);
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memcpy(&buffer[i], array, length);
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i += length;
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*split_option = 1;
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PRINTF("OPTION type %u, delta %u, len %u\n", number, number - current_number, length);
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}
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return i;
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}
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/*-----------------------------------------------------------------------------------*/
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static
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void
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coap_merge_multi_option(char **dst, size_t *dst_len, uint8_t *option, size_t option_len, char separator)
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{
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/* Merge multiple options. */
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if (*dst_len > 0)
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{
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/* dst already contains an option: concatenate */
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(*dst)[*dst_len] = separator;
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*dst_len += 1;
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/* memmove handles 2-byte option headers */
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memmove((*dst)+(*dst_len), option, option_len);
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*dst_len += option_len;
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}
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else
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{
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/* dst is empty: set to option */
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*dst = (char *) option;
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*dst_len = option_len;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static
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int
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coap_get_variable(const char *buffer, size_t length, const char *name, const char **output)
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{
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const char *start = NULL;
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const char *end = NULL;
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const char *value_end = NULL;
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size_t name_len = 0;
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/*initialize the output buffer first*/
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*output = 0;
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name_len = strlen(name);
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end = buffer + length;
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for (start = buffer; start + name_len < end; ++start){
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if ((start == buffer || start[-1] == '&') && start[name_len] == '=' &&
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strncmp(name, start, name_len)==0) {
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/* Point start to variable value */
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start += name_len + 1;
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/* Point end to the end of the value */
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value_end = (const char *) memchr(start, '&', end - start);
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if (value_end == NULL) {
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value_end = end;
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}
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*output = start;
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return (value_end - start);
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}
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}
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return 0;
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}
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/*-----------------------------------------------------------------------------------*/
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/*- MEASSAGE SENDING ----------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------------*/
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void
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coap_init_connection(uint16_t port)
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{
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/* new connection with remote host */
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udp_conn = udp_new(NULL, 0, NULL);
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udp_bind(udp_conn, port);
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PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
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/* Initialize transaction ID. */
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current_mid = random_rand();
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}
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/*-----------------------------------------------------------------------------------*/
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uint16_t
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coap_get_mid()
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{
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return ++current_mid;
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}
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/*-----------------------------------------------------------------------------------*/
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/*- MEASSAGE PROCESSING -------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------------*/
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void
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coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t mid)
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{
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coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
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/* Important thing */
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memset(coap_pkt, 0, sizeof(coap_packet_t));
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coap_pkt->type = type;
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coap_pkt->code = code;
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coap_pkt->mid = mid;
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}
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/*-----------------------------------------------------------------------------------*/
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size_t
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coap_serialize_message(void *packet, uint8_t *buffer)
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{
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coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
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/* Initialize */
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coap_pkt->buffer = buffer;
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coap_pkt->version = 1;
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coap_pkt->option_count = 0;
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/* Serialize options */
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uint8_t *option = coap_pkt->buffer + COAP_HEADER_LEN;
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unsigned int current_number = 0;
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PRINTF("-Serializing options-\n");
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/* The options must be serialized in the order of their number */
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COAP_SERIALIZE_BYTE_OPTION( COAP_OPTION_IF_MATCH, if_match, "If-Match")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_HOST, uri_host, '\0', "Uri-Host")
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COAP_SERIALIZE_BYTE_OPTION( COAP_OPTION_ETAG, etag, "ETag")
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_IF_NONE_MATCH, content_type-coap_pkt->content_type, "If-None-Match") /* hack to get a zero field */
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_OBSERVE, observe, "Observe")
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_URI_PORT, uri_port, "Uri-Port")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_LOCATION_PATH, location_path, '/', "Location-Path")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_PATH, uri_path, '/', "Uri-Path")
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_CONTENT_TYPE, content_type, "Content-Format")
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_MAX_AGE, max_age, "Max-Age")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_QUERY, uri_query, '&', "Uri-Query")
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COAP_SERIALIZE_ACCEPT_OPTION( COAP_OPTION_ACCEPT, accept, "Accept")
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COAP_SERIALIZE_BYTE_OPTION( COAP_OPTION_TOKEN, token, "Token")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_LOCATION_QUERY, location_query, '&', "Location-Query")
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COAP_SERIALIZE_BLOCK_OPTION( COAP_OPTION_BLOCK2, block2, "Block2")
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COAP_SERIALIZE_BLOCK_OPTION( COAP_OPTION_BLOCK1, block1, "Block1")
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COAP_SERIALIZE_INT_OPTION( COAP_OPTION_SIZE, size, "Size")
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COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_PROXY_URI, proxy_uri, '\0', "Proxy-Uri")
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/* Option terminator 0xF0 for 15 and more options */
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if (coap_pkt->option_count>14)
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{
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coap_pkt->option_count = 15;
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*option = 0xF0;
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++option;
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}
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/* pack payload */
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if ((option - coap_pkt->buffer)<=COAP_MAX_HEADER_SIZE)
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{
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memmove(option, coap_pkt->payload, coap_pkt->payload_len);
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}
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else
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{
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/* An error occured. Caller must check for !=0. */
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coap_pkt->buffer = NULL;
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coap_error_message = "Serialized header exceeds COAP_MAX_HEADER_SIZE";
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return 0;
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}
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/* set header fields */
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coap_pkt->buffer[0] = 0x00;
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coap_pkt->buffer[0] |= COAP_HEADER_VERSION_MASK & (coap_pkt->version)<<COAP_HEADER_VERSION_POSITION;
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coap_pkt->buffer[0] |= COAP_HEADER_TYPE_MASK & (coap_pkt->type)<<COAP_HEADER_TYPE_POSITION;
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coap_pkt->buffer[0] |= COAP_HEADER_OPTION_COUNT_MASK & (coap_pkt->option_count)<<COAP_HEADER_OPTION_COUNT_POSITION;
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coap_pkt->buffer[1] = coap_pkt->code;
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coap_pkt->buffer[2] = 0xFF & (coap_pkt->mid)>>8;
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coap_pkt->buffer[3] = 0xFF & coap_pkt->mid;
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PRINTF("-Done %u options, header len %u, payload len %u-\n", coap_pkt->option_count, option - buffer, coap_pkt->payload_len);
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return (option - buffer) + coap_pkt->payload_len; /* packet length */
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}
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/*-----------------------------------------------------------------------------------*/
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void
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coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length)
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{
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/* Configure connection to reply to client */
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uip_ipaddr_copy(&udp_conn->ripaddr, addr);
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udp_conn->rport = port;
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uip_udp_packet_send(udp_conn, data, length);
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PRINTF("-sent UDP datagram (%u)-\n", length);
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/* Restore server connection to allow data from any node */
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memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
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udp_conn->rport = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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coap_status_t
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coap_parse_message(void *packet, uint8_t *data, uint16_t data_len)
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{
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coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
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/* Initialize packet */
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memset(coap_pkt, 0, sizeof(coap_packet_t));
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/* pointer to packet bytes */
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coap_pkt->buffer = data;
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/* parse header fields */
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coap_pkt->version = (COAP_HEADER_VERSION_MASK & coap_pkt->buffer[0])>>COAP_HEADER_VERSION_POSITION;
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coap_pkt->type = (COAP_HEADER_TYPE_MASK & coap_pkt->buffer[0])>>COAP_HEADER_TYPE_POSITION;
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coap_pkt->option_count = (COAP_HEADER_OPTION_COUNT_MASK & coap_pkt->buffer[0])>>COAP_HEADER_OPTION_COUNT_POSITION;
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coap_pkt->code = coap_pkt->buffer[1];
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coap_pkt->mid = coap_pkt->buffer[2]<<8 | coap_pkt->buffer[3];
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if (coap_pkt->version != 1)
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{
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coap_error_message = "CoAP version must be 1";
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return BAD_REQUEST_4_00;
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}
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/* parse options */
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memset(coap_pkt->options, 0, sizeof(coap_pkt->options));
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uint8_t *current_option = data + COAP_HEADER_LEN;
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if (coap_pkt->option_count)
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{
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int option_index = 0;
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unsigned int current_number = 0;
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size_t option_len = 0;
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PRINTF("-Parsing %u options-\n", coap_pkt->option_count);
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for (option_index=0; option_index < coap_pkt->option_count || coap_pkt->option_count==15; ++option_index) {
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|
|
/* Option terminator 0xF0 */
|
|
if (current_option[0]==0xF0)
|
|
{
|
|
break;
|
|
}
|
|
/* Option jumps */
|
|
else if (current_option[0]==0xF1)
|
|
{
|
|
PRINTF("JUMP 1: 15\n");
|
|
current_number += 15;
|
|
++current_option;
|
|
}
|
|
else if (current_option[0]==0xF2)
|
|
{
|
|
PRINTF("JUMP 2: %u\n", (current_option[1]+2) * 8);
|
|
current_number += (current_option[1]+2) * 8;
|
|
current_option += 2;
|
|
}
|
|
else if (current_option[0]==0xF3)
|
|
{
|
|
unsigned int jump = (current_option[1]<<8) | current_option[2];
|
|
PRINTF("JUMP 3: %u\n", (jump+258) * 8);
|
|
current_number += (jump+258) * 8;
|
|
current_option +=3;
|
|
}
|
|
|
|
current_number += current_option[0]>>4;
|
|
|
|
PRINTF("OPTION %u (type %u, delta %u, len %u", option_index, current_number, current_option[0]>>4, (0x0F & current_option[0]));
|
|
|
|
if ((0x0F & current_option[0]) < 15)
|
|
{
|
|
option_len = 0x0F & current_option[0];
|
|
++current_option;
|
|
}
|
|
else
|
|
{
|
|
option_len = 15;
|
|
do
|
|
{
|
|
++current_option;
|
|
option_len += current_option[0];
|
|
PRINTF("+%u", current_option[0]);
|
|
} while (current_option[0]==255);
|
|
++current_option;
|
|
}
|
|
PRINTF("=%u: ", option_len);
|
|
|
|
SET_OPTION(coap_pkt, current_number);
|
|
|
|
switch (current_number)
|
|
{
|
|
case COAP_OPTION_CONTENT_TYPE:
|
|
coap_pkt->content_type = coap_parse_int_option(current_option, option_len);
|
|
PRINTF("Content-Format [%u]\n", coap_pkt->content_type);
|
|
break;
|
|
case COAP_OPTION_MAX_AGE:
|
|
coap_pkt->max_age = coap_parse_int_option(current_option, option_len);
|
|
PRINTF("Max-Age [%lu]\n", coap_pkt->max_age);
|
|
break;
|
|
case COAP_OPTION_PROXY_URI:
|
|
/*FIXME check for own end-point */
|
|
coap_pkt->proxy_uri = (char *) current_option;
|
|
coap_pkt->proxy_uri_len = option_len;
|
|
/*TODO length > 270 not implemented (actually not required) */
|
|
PRINTF("Proxy-Uri NOT IMPLEMENTED [%.*s]\n", coap_pkt->proxy_uri_len, coap_pkt->proxy_uri);
|
|
coap_error_message = "This is a constrained server (Contiki)";
|
|
return PROXYING_NOT_SUPPORTED_5_05;
|
|
break;
|
|
case COAP_OPTION_ETAG:
|
|
coap_pkt->etag_len = MIN(COAP_ETAG_LEN, option_len);
|
|
memcpy(coap_pkt->etag, current_option, coap_pkt->etag_len);
|
|
PRINTF("ETag %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->etag_len,
|
|
coap_pkt->etag[0],
|
|
coap_pkt->etag[1],
|
|
coap_pkt->etag[2],
|
|
coap_pkt->etag[3],
|
|
coap_pkt->etag[4],
|
|
coap_pkt->etag[5],
|
|
coap_pkt->etag[6],
|
|
coap_pkt->etag[7]
|
|
); /*FIXME always prints 8 bytes */
|
|
break;
|
|
case COAP_OPTION_URI_HOST:
|
|
coap_pkt->uri_host = (char *) current_option;
|
|
coap_pkt->uri_host_len = option_len;
|
|
PRINTF("Uri-Host [%.*s]\n", coap_pkt->uri_host_len, coap_pkt->uri_host);
|
|
break;
|
|
case COAP_OPTION_LOCATION_PATH:
|
|
/* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */
|
|
coap_merge_multi_option( (char **) &(coap_pkt->location_path), &(coap_pkt->location_path_len), current_option, option_len, '/');
|
|
PRINTF("Location-Path [%.*s]\n", coap_pkt->location_path_len, coap_pkt->location_path);
|
|
break;
|
|
case COAP_OPTION_URI_PORT:
|
|
coap_pkt->uri_port = coap_parse_int_option(current_option, option_len);
|
|
PRINTF("Uri-Port [%u]\n", coap_pkt->uri_port);
|
|
break;
|
|
case COAP_OPTION_LOCATION_QUERY:
|
|
/* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */
|
|
coap_merge_multi_option( (char **) &(coap_pkt->location_query), &(coap_pkt->location_query_len), current_option, option_len, '&');
|
|
PRINTF("Location-Query [%.*s]\n", coap_pkt->location_query_len, coap_pkt->location_query);
|
|
break;
|
|
case COAP_OPTION_URI_PATH:
|
|
/* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */
|
|
coap_merge_multi_option( (char **) &(coap_pkt->uri_path), &(coap_pkt->uri_path_len), current_option, option_len, '/');
|
|
PRINTF("Uri-Path [%.*s]\n", coap_pkt->uri_path_len, coap_pkt->uri_path);
|
|
break;
|
|
case COAP_OPTION_OBSERVE:
|
|
coap_pkt->observe = coap_parse_int_option(current_option, option_len);
|
|
PRINTF("Observe [%lu]\n", coap_pkt->observe);
|
|
break;
|
|
case COAP_OPTION_TOKEN:
|
|
coap_pkt->token_len = MIN(COAP_TOKEN_LEN, option_len);
|
|
memcpy(coap_pkt->token, current_option, coap_pkt->token_len);
|
|
PRINTF("Token %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->token_len,
|
|
coap_pkt->token[0],
|
|
coap_pkt->token[1],
|
|
coap_pkt->token[2],
|
|
coap_pkt->token[3],
|
|
coap_pkt->token[4],
|
|
coap_pkt->token[5],
|
|
coap_pkt->token[6],
|
|
coap_pkt->token[7]
|
|
); /*FIXME always prints 8 bytes */
|
|
break;
|
|
case COAP_OPTION_ACCEPT:
|
|
if (coap_pkt->accept_num < COAP_MAX_ACCEPT_NUM)
|
|
{
|
|
coap_pkt->accept[coap_pkt->accept_num] = coap_parse_int_option(current_option, option_len);
|
|
coap_pkt->accept_num += 1;
|
|
PRINTF("Accept [%u]\n", coap_pkt->content_type);
|
|
}
|
|
break;
|
|
case COAP_OPTION_IF_MATCH:
|
|
/*FIXME support multiple ETags */
|
|
coap_pkt->if_match_len = MIN(COAP_ETAG_LEN, option_len);
|
|
memcpy(coap_pkt->if_match, current_option, coap_pkt->if_match_len);
|
|
PRINTF("If-Match %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->if_match_len,
|
|
coap_pkt->if_match[0],
|
|
coap_pkt->if_match[1],
|
|
coap_pkt->if_match[2],
|
|
coap_pkt->if_match[3],
|
|
coap_pkt->if_match[4],
|
|
coap_pkt->if_match[5],
|
|
coap_pkt->if_match[6],
|
|
coap_pkt->if_match[7]
|
|
); /*FIXME always prints 8 bytes */
|
|
break;
|
|
case COAP_OPTION_URI_QUERY:
|
|
/* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */
|
|
coap_merge_multi_option( (char **) &(coap_pkt->uri_query), &(coap_pkt->uri_query_len), current_option, option_len, '&');
|
|
PRINTF("Uri-Query [%.*s]\n", coap_pkt->uri_query_len, coap_pkt->uri_query);
|
|
break;
|
|
case COAP_OPTION_BLOCK2:
|
|
coap_pkt->block2_num = coap_parse_int_option(current_option, option_len);
|
|
coap_pkt->block2_more = (coap_pkt->block2_num & 0x08)>>3;
|
|
coap_pkt->block2_size = 16 << (coap_pkt->block2_num & 0x07);
|
|
coap_pkt->block2_offset = (coap_pkt->block2_num & ~0x0000000F)<<(coap_pkt->block2_num & 0x07);
|
|
coap_pkt->block2_num >>= 4;
|
|
PRINTF("Block2 [%lu%s (%u B/blk)]\n", coap_pkt->block2_num, coap_pkt->block2_more ? "+" : "", coap_pkt->block2_size);
|
|
break;
|
|
case COAP_OPTION_BLOCK1:
|
|
coap_pkt->block1_num = coap_parse_int_option(current_option, option_len);
|
|
coap_pkt->block1_more = (coap_pkt->block1_num & 0x08)>>3;
|
|
coap_pkt->block1_size = 16 << (coap_pkt->block1_num & 0x07);
|
|
coap_pkt->block1_offset = (coap_pkt->block1_num & ~0x0000000F)<<(coap_pkt->block1_num & 0x07);
|
|
coap_pkt->block1_num >>= 4;
|
|
PRINTF("Block1 [%lu%s (%u B/blk)]\n", coap_pkt->block1_num, coap_pkt->block1_more ? "+" : "", coap_pkt->block1_size);
|
|
break;
|
|
case COAP_OPTION_SIZE:
|
|
coap_pkt->size = coap_parse_int_option(current_option, option_len);
|
|
PRINTF("Size [%lu]\n", coap_pkt->size);
|
|
break;
|
|
case COAP_OPTION_IF_NONE_MATCH:
|
|
coap_pkt->if_none_match = 1;
|
|
PRINTF("If-None-Match\n");
|
|
break;
|
|
default:
|
|
PRINTF("unknown (%u)\n", current_number);
|
|
/* Check if critical (odd) */
|
|
if (current_number & 1)
|
|
{
|
|
coap_error_message = "Unsupported critical option";
|
|
return BAD_OPTION_4_02;
|
|
}
|
|
}
|
|
|
|
current_option += option_len;
|
|
} /* for */
|
|
PRINTF("-Done parsing-------\n");
|
|
} /* if (oc) */
|
|
|
|
coap_pkt->payload = current_option;
|
|
coap_pkt->payload_len = data_len - (coap_pkt->payload - data);
|
|
|
|
/* also for receiving, the Erbium upper bound is REST_MAX_CHUNK_SIZE */
|
|
if (coap_pkt->payload_len > REST_MAX_CHUNK_SIZE)
|
|
{
|
|
coap_pkt->payload_len = REST_MAX_CHUNK_SIZE;
|
|
}
|
|
|
|
/* Null-terminate payload */
|
|
coap_pkt->payload[coap_pkt->payload_len] = '\0';
|
|
|
|
return NO_ERROR;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/*- REST FRAMEWORK FUNCTIONS --------------------------------------------------------*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_query_variable(void *packet, const char *name, const char **output)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (IS_OPTION(coap_pkt, COAP_OPTION_URI_QUERY)) {
|
|
return coap_get_variable(coap_pkt->uri_query, coap_pkt->uri_query_len, name, output);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
coap_get_post_variable(void *packet, const char *name, const char **output)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (coap_pkt->payload_len) {
|
|
return coap_get_variable((const char *)coap_pkt->payload, coap_pkt->payload_len, name, output);
|
|
}
|
|
return 0;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_set_status_code(void *packet, unsigned int code)
|
|
{
|
|
if (code <= 0xFF)
|
|
{
|
|
((coap_packet_t *)packet)->code = (uint8_t) code;
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/*- HEADER OPTION GETTERS AND SETTERS -----------------------------------------------*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
unsigned int
|
|
coap_get_header_content_type(void *packet)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_CONTENT_TYPE)) return -1;
|
|
|
|
return coap_pkt->content_type;
|
|
}
|
|
|
|
int
|
|
coap_set_header_content_type(void *packet, unsigned int content_type)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->content_type = (coap_content_type_t) content_type;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_CONTENT_TYPE);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_accept(void *packet, const uint16_t **accept)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_ACCEPT)) return 0;
|
|
|
|
*accept = coap_pkt->accept;
|
|
return coap_pkt->accept_num;
|
|
}
|
|
|
|
int
|
|
coap_set_header_accept(void *packet, uint16_t accept)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (coap_pkt->accept_num < COAP_MAX_ACCEPT_NUM)
|
|
{
|
|
coap_pkt->accept[coap_pkt->accept_num] = accept;
|
|
coap_pkt->accept_num += 1;
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_ACCEPT);
|
|
}
|
|
return coap_pkt->accept_num;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_max_age(void *packet, uint32_t *age)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_MAX_AGE)) {
|
|
*age = COAP_DEFAULT_MAX_AGE;
|
|
} else {
|
|
*age = coap_pkt->max_age;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
coap_set_header_max_age(void *packet, uint32_t age)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->max_age = age;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_MAX_AGE);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_etag(void *packet, const uint8_t **etag)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_ETAG)) return 0;
|
|
|
|
*etag = coap_pkt->etag;
|
|
return coap_pkt->etag_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_etag(void *packet, const uint8_t *etag, size_t etag_len)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->etag_len = MIN(COAP_ETAG_LEN, etag_len);
|
|
memcpy(coap_pkt->etag, etag, coap_pkt->etag_len);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_ETAG);
|
|
return coap_pkt->etag_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/*FIXME support multiple ETags */
|
|
int
|
|
coap_get_header_if_match(void *packet, const uint8_t **etag)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_IF_MATCH)) return 0;
|
|
|
|
*etag = coap_pkt->if_match;
|
|
return coap_pkt->if_match_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_if_match(void *packet, const uint8_t *etag, size_t etag_len)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->if_match_len = MIN(COAP_ETAG_LEN, etag_len);
|
|
memcpy(coap_pkt->if_match, etag, coap_pkt->if_match_len);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_IF_MATCH);
|
|
return coap_pkt->if_match_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_if_none_match(void *packet)
|
|
{
|
|
return IS_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_NONE_MATCH) ? 1 : 0;
|
|
}
|
|
|
|
int
|
|
coap_set_header_if_none_match(void *packet)
|
|
{
|
|
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_NONE_MATCH);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_token(void *packet, const uint8_t **token)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_TOKEN)) return 0;
|
|
|
|
*token = coap_pkt->token;
|
|
return coap_pkt->token_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_token(void *packet, const uint8_t *token, size_t token_len)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->token_len = MIN(COAP_TOKEN_LEN, token_len);
|
|
memcpy(coap_pkt->token, token, coap_pkt->token_len);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_TOKEN);
|
|
return coap_pkt->token_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_proxy_uri(void *packet, const char **uri)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_PROXY_URI)) return 0;
|
|
|
|
*uri = coap_pkt->proxy_uri;
|
|
return coap_pkt->proxy_uri_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_proxy_uri(void *packet, const char *uri)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->proxy_uri = uri;
|
|
coap_pkt->proxy_uri_len = strlen(uri);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_PROXY_URI);
|
|
return coap_pkt->proxy_uri_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_uri_host(void *packet, const char **host)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_HOST)) return 0;
|
|
|
|
*host = coap_pkt->uri_host;
|
|
return coap_pkt->uri_host_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_uri_host(void *packet, const char *host)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->uri_host = host;
|
|
coap_pkt->uri_host_len = strlen(host);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_URI_HOST);
|
|
return coap_pkt->uri_host_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_uri_path(void *packet, const char **path)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_PATH)) return 0;
|
|
|
|
*path = coap_pkt->uri_path;
|
|
return coap_pkt->uri_path_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_uri_path(void *packet, const char *path)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
while (path[0]=='/') ++path;
|
|
|
|
coap_pkt->uri_path = path;
|
|
coap_pkt->uri_path_len = strlen(path);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_URI_PATH);
|
|
return coap_pkt->uri_path_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_uri_query(void *packet, const char **query)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_QUERY)) return 0;
|
|
|
|
*query = coap_pkt->uri_query;
|
|
return coap_pkt->uri_query_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_uri_query(void *packet, const char *query)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
while (query[0]=='?') ++query;
|
|
|
|
coap_pkt->uri_query = query;
|
|
coap_pkt->uri_query_len = strlen(query);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_URI_QUERY);
|
|
return coap_pkt->uri_query_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_location_path(void *packet, const char **path)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_LOCATION_PATH)) return 0;
|
|
|
|
*path = coap_pkt->location_path;
|
|
return coap_pkt->location_path_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_location_path(void *packet, const char *path)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
char *query;
|
|
|
|
while (path[0]=='/') ++path;
|
|
|
|
if ((query = strchr(path, '?')))
|
|
{
|
|
coap_set_header_location_query(packet, query+1);
|
|
coap_pkt->location_path_len = query - path;
|
|
}
|
|
else
|
|
{
|
|
coap_pkt->location_path_len = strlen(path);
|
|
}
|
|
|
|
coap_pkt->location_path = path;
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_LOCATION_PATH);
|
|
return coap_pkt->location_path_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_location_query(void *packet, const char **query)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_LOCATION_QUERY)) return 0;
|
|
|
|
*query = coap_pkt->location_query;
|
|
return coap_pkt->location_query_len;
|
|
}
|
|
|
|
int
|
|
coap_set_header_location_query(void *packet, const char *query)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
while (query[0]=='?') ++query;
|
|
|
|
coap_pkt->location_query = query;
|
|
coap_pkt->location_query_len = strlen(query);
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_LOCATION_QUERY);
|
|
return coap_pkt->location_query_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_observe(void *packet, uint32_t *observe)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_OBSERVE)) return 0;
|
|
|
|
*observe = coap_pkt->observe;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
coap_set_header_observe(void *packet, uint32_t observe)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->observe = observe;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_OBSERVE);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_block2(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_BLOCK2)) return 0;
|
|
|
|
/* pointers may be NULL to get only specific block parameters */
|
|
if (num!=NULL) *num = coap_pkt->block2_num;
|
|
if (more!=NULL) *more = coap_pkt->block2_more;
|
|
if (size!=NULL) *size = coap_pkt->block2_size;
|
|
if (offset!=NULL) *offset = coap_pkt->block2_offset;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
coap_set_header_block2(void *packet, uint32_t num, uint8_t more, uint16_t size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (size<16) return 0;
|
|
if (size>2048) return 0;
|
|
if (num>0x0FFFFF) return 0;
|
|
|
|
coap_pkt->block2_num = num;
|
|
coap_pkt->block2_more = more ? 1 : 0;
|
|
coap_pkt->block2_size = size;
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_BLOCK2);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_block1(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_BLOCK1)) return 0;
|
|
|
|
/* pointers may be NULL to get only specific block parameters */
|
|
if (num!=NULL) *num = coap_pkt->block1_num;
|
|
if (more!=NULL) *more = coap_pkt->block1_more;
|
|
if (size!=NULL) *size = coap_pkt->block1_size;
|
|
if (offset!=NULL) *offset = coap_pkt->block1_offset;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
coap_set_header_block1(void *packet, uint32_t num, uint8_t more, uint16_t size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (size<16) return 0;
|
|
if (size>2048) return 0;
|
|
if (num>0x0FFFFF) return 0;
|
|
|
|
coap_pkt->block1_num = num;
|
|
coap_pkt->block1_more = more;
|
|
coap_pkt->block1_size = size;
|
|
|
|
SET_OPTION(coap_pkt, COAP_OPTION_BLOCK1);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_size(void *packet, uint32_t *size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (!IS_OPTION(coap_pkt, COAP_OPTION_SIZE)) return 0;
|
|
|
|
*size = coap_pkt->size;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
coap_set_header_size(void *packet, uint32_t size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
coap_pkt->size = size;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_SIZE);
|
|
return 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/*- PAYLOAD -------------------------------------------------------------------------*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_payload(void *packet, const uint8_t **payload)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
if (coap_pkt->payload) {
|
|
*payload = coap_pkt->payload;
|
|
return coap_pkt->payload_len;
|
|
} else {
|
|
*payload = NULL;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
coap_set_payload(void *packet, const void *payload, size_t length)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
|
|
|
|
//PRINTF("setting payload (%u/%u)\n", length, REST_MAX_CHUNK_SIZE);
|
|
|
|
coap_pkt->payload = (uint8_t *) payload;
|
|
coap_pkt->payload_len = MIN(REST_MAX_CHUNK_SIZE, length);
|
|
|
|
return coap_pkt->payload_len;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|