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1195 lines
38 KiB
C
1195 lines
38 KiB
C
/*
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* Copyright (c) 2013, 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 (RFC).
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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#include <string.h>
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#include <stdio.h>
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#include "contiki.h"
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#include "sys/cc.h"
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#include "contiki-net.h"
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#include "er-coap.h"
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#include "er-coap-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 erbium_status_code = NO_ERROR;
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char *coap_error_message = "";
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/*---------------------------------------------------------------------------*/
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/*- Local helper functions --------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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static 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 uint32_t
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coap_parse_int_option(uint8_t *bytes, size_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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var <<= 8;
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var |= 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 uint8_t
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coap_option_nibble(unsigned int value)
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{
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if(value < 13) {
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return value;
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} else if(value <= 0xFF + 13) {
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return 13;
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} else {
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return 14;
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}
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}
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/*---------------------------------------------------------------------------*/
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static size_t
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coap_set_option_header(unsigned int delta, size_t length, uint8_t *buffer)
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{
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size_t written = 0;
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buffer[0] = coap_option_nibble(delta) << 4 | coap_option_nibble(length);
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/* avoids code duplication without function overhead */
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unsigned int *x = δ
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do {
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if(*x > 268) {
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buffer[++written] = (*x - 269) >> 8;
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buffer[++written] = (*x - 269);
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} else if(*x > 12) {
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buffer[++written] = (*x - 13);
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}
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} while(x != &length && (x = &length));
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PRINTF("WRITTEN %u B opt header\n", 1 + written);
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return ++written;
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}
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/*---------------------------------------------------------------------------*/
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static size_t
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coap_serialize_int_option(unsigned int number, unsigned int current_number,
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uint8_t *buffer, uint32_t value)
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{
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size_t i = 0;
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if(0xFF000000 & value) {
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++i;
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}
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if(0xFFFF0000 & value) {
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++i;
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}
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if(0xFFFFFF00 & value) {
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++i;
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}
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if(0xFFFFFFFF & value) {
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++i;
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}
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PRINTF("OPTION %u (delta %u, len %u)\n", number, number - current_number,
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i);
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i = coap_set_option_header(number - current_number, i, buffer);
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if(0xFF000000 & value) {
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buffer[i++] = (uint8_t)(value >> 24);
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}
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if(0xFFFF0000 & value) {
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buffer[i++] = (uint8_t)(value >> 16);
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}
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if(0xFFFFFF00 & value) {
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buffer[i++] = (uint8_t)(value >> 8);
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}
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if(0xFFFFFFFF & value) {
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buffer[i++] = (uint8_t)(value);
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}
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return i;
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}
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/*---------------------------------------------------------------------------*/
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static size_t
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coap_serialize_array_option(unsigned int number, unsigned int current_number,
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uint8_t *buffer, uint8_t *array, size_t length,
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char split_char)
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{
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size_t i = 0;
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PRINTF("ARRAY type %u, len %u, full [%.*s]\n", number, length, length,
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array);
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if(split_char != '\0') {
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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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for(j = 0; j <= length + 1; ++j) {
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PRINTF("STEP %u/%u (%c)\n", j, length, array[j]);
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if(array[j] == split_char || j == length) {
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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,
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&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,
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number - current_number, i, temp_length, part_start);
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++j; /* skip the splitter */
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current_number = number;
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part_start = array + j;
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}
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} /* for */
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} else {
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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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PRINTF("OPTION type %u, delta %u, len %u\n", number,
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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 void
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coap_merge_multi_option(char **dst, size_t *dst_len, uint8_t *option,
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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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/* 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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} else {
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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 int
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coap_get_variable(const char *buffer, size_t length, const char *name,
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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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/*- Internal API ------------------------------------------------------------*/
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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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void
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coap_init_message(void *packet, coap_message_type_t type, uint8_t code,
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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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uint8_t *option;
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unsigned int current_number = 0;
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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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PRINTF("-Serializing MID %u to %p, ", coap_pkt->mid, coap_pkt->buffer);
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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
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& (coap_pkt->version) << COAP_HEADER_VERSION_POSITION;
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coap_pkt->buffer[0] |= COAP_HEADER_TYPE_MASK
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& (coap_pkt->type) << COAP_HEADER_TYPE_POSITION;
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coap_pkt->buffer[0] |= COAP_HEADER_TOKEN_LEN_MASK
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& (coap_pkt->token_len) << COAP_HEADER_TOKEN_LEN_POSITION;
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coap_pkt->buffer[1] = coap_pkt->code;
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coap_pkt->buffer[2] = (uint8_t)((coap_pkt->mid) >> 8);
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coap_pkt->buffer[3] = (uint8_t)(coap_pkt->mid);
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/* empty packet, dont need to do more stuff */
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if(!coap_pkt->code) {
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PRINTF("-Done serializing empty message at %p-\n", option);
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return 4;
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}
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/* set Token */
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PRINTF("Token (len %u)", coap_pkt->token_len);
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option = coap_pkt->buffer + COAP_HEADER_LEN;
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for(current_number = 0; current_number < coap_pkt->token_len;
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++current_number) {
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PRINTF(" %02X", coap_pkt->token[current_number]);
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*option = coap_pkt->token[current_number];
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++option;
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}
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PRINTF("-\n");
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/* Serialize options */
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current_number = 0;
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PRINTF("-Serializing options at %p-\n", option);
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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',
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"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,
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content_format -
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coap_pkt->
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content_format /* hack to get a zero field */,
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"If-None-Match");
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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, '/',
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"Location-Path");
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COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_URI_PATH, uri_path, '/',
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"Uri-Path");
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COAP_SERIALIZE_INT_OPTION(COAP_OPTION_CONTENT_FORMAT, content_format,
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"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, '&',
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"Uri-Query");
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COAP_SERIALIZE_INT_OPTION(COAP_OPTION_ACCEPT, accept, "Accept");
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COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_LOCATION_QUERY, location_query,
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'&', "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_SIZE2, size2, "Size2");
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COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_PROXY_URI, proxy_uri, '\0',
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"Proxy-Uri");
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COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_PROXY_SCHEME, proxy_scheme, '\0',
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"Proxy-Scheme");
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COAP_SERIALIZE_INT_OPTION(COAP_OPTION_SIZE1, size1, "Size1");
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PRINTF("-Done serializing at %p----\n", option);
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/* Pack payload */
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if((option - coap_pkt->buffer) <= COAP_MAX_HEADER_SIZE) {
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/* Payload marker */
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if(coap_pkt->payload_len) {
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*option = 0xFF;
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++option;
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}
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memmove(option, coap_pkt->payload, coap_pkt->payload_len);
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} else {
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/* an error occurred: 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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PRINTF("-Done %u B (header len %u, payload len %u)-\n",
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coap_pkt->payload_len + option - buffer, option - buffer,
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coap_pkt->payload_len);
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PRINTF("Dump [0x%02X %02X %02X %02X %02X %02X %02X %02X]\n",
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coap_pkt->buffer[0],
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coap_pkt->buffer[1],
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coap_pkt->buffer[2],
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coap_pkt->buffer[3],
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coap_pkt->buffer[4],
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coap_pkt->buffer[5], coap_pkt->buffer[6], coap_pkt->buffer[7]
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);
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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,
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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 socket 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])
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>> COAP_HEADER_VERSION_POSITION;
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coap_pkt->type = (COAP_HEADER_TYPE_MASK & coap_pkt->buffer[0])
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>> COAP_HEADER_TYPE_POSITION;
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coap_pkt->token_len =
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MIN(COAP_TOKEN_LEN,
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(COAP_HEADER_TOKEN_LEN_MASK & coap_pkt->
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buffer[0]) >> COAP_HEADER_TOKEN_LEN_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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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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|
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uint8_t *current_option = data + COAP_HEADER_LEN;
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|
|
|
memcpy(coap_pkt->token, current_option, coap_pkt->token_len);
|
|
PRINTF("Token (len %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 */
|
|
|
|
/* parse options */
|
|
memset(coap_pkt->options, 0, sizeof(coap_pkt->options));
|
|
current_option += coap_pkt->token_len;
|
|
|
|
unsigned int option_number = 0;
|
|
unsigned int option_delta = 0;
|
|
size_t option_length = 0;
|
|
|
|
while(current_option < data + data_len) {
|
|
/* payload marker 0xFF, currently only checking for 0xF* because rest is reserved */
|
|
if((current_option[0] & 0xF0) == 0xF0) {
|
|
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';
|
|
|
|
break;
|
|
}
|
|
|
|
option_delta = current_option[0] >> 4;
|
|
option_length = current_option[0] & 0x0F;
|
|
++current_option;
|
|
|
|
/* avoids code duplication without function overhead */
|
|
unsigned int *x = &option_delta;
|
|
|
|
do {
|
|
if(*x == 13) {
|
|
*x += current_option[0];
|
|
++current_option;
|
|
} else if(*x == 14) {
|
|
*x += 255;
|
|
*x += current_option[0] << 8;
|
|
++current_option;
|
|
*x += current_option[0];
|
|
++current_option;
|
|
}
|
|
} while(x != &option_length && (x = &option_length));
|
|
|
|
option_number += option_delta;
|
|
|
|
PRINTF("OPTION %u (delta %u, len %u): ", option_number, option_delta,
|
|
option_length);
|
|
|
|
SET_OPTION(coap_pkt, option_number);
|
|
|
|
switch(option_number) {
|
|
case COAP_OPTION_CONTENT_FORMAT:
|
|
coap_pkt->content_format = coap_parse_int_option(current_option,
|
|
option_length);
|
|
PRINTF("Content-Format [%u]\n", coap_pkt->content_format);
|
|
break;
|
|
case COAP_OPTION_MAX_AGE:
|
|
coap_pkt->max_age = coap_parse_int_option(current_option,
|
|
option_length);
|
|
PRINTF("Max-Age [%lu]\n", coap_pkt->max_age);
|
|
break;
|
|
case COAP_OPTION_ETAG:
|
|
coap_pkt->etag_len = MIN(COAP_ETAG_LEN, option_length);
|
|
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_ACCEPT:
|
|
coap_pkt->accept = coap_parse_int_option(current_option, option_length);
|
|
PRINTF("Accept [%u]\n", coap_pkt->accept);
|
|
break;
|
|
case COAP_OPTION_IF_MATCH:
|
|
/* TODO support multiple ETags */
|
|
coap_pkt->if_match_len = MIN(COAP_ETAG_LEN, option_length);
|
|
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_IF_NONE_MATCH:
|
|
coap_pkt->if_none_match = 1;
|
|
PRINTF("If-None-Match\n");
|
|
break;
|
|
|
|
case COAP_OPTION_PROXY_URI:
|
|
#if COAP_PROXY_OPTION_PROCESSING
|
|
coap_pkt->proxy_uri = (char *)current_option;
|
|
coap_pkt->proxy_uri_len = option_length;
|
|
#endif
|
|
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_PROXY_SCHEME:
|
|
#if COAP_PROXY_OPTION_PROCESSING
|
|
coap_pkt->proxy_scheme = (char *)current_option;
|
|
coap_pkt->proxy_scheme_len = option_length;
|
|
#endif
|
|
PRINTF("Proxy-Scheme NOT IMPLEMENTED [%.*s]\n",
|
|
coap_pkt->proxy_scheme_len, coap_pkt->proxy_scheme);
|
|
coap_error_message = "This is a constrained server (Contiki)";
|
|
return PROXYING_NOT_SUPPORTED_5_05;
|
|
break;
|
|
|
|
case COAP_OPTION_URI_HOST:
|
|
coap_pkt->uri_host = (char *)current_option;
|
|
coap_pkt->uri_host_len = option_length;
|
|
PRINTF("Uri-Host [%.*s]\n", coap_pkt->uri_host_len, coap_pkt->uri_host);
|
|
break;
|
|
case COAP_OPTION_URI_PORT:
|
|
coap_pkt->uri_port = coap_parse_int_option(current_option,
|
|
option_length);
|
|
PRINTF("Uri-Port [%u]\n", coap_pkt->uri_port);
|
|
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_length, '/');
|
|
PRINTF("Uri-Path [%.*s]\n", coap_pkt->uri_path_len, coap_pkt->uri_path);
|
|
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_length, '&');
|
|
PRINTF("Uri-Query [%.*s]\n", coap_pkt->uri_query_len,
|
|
coap_pkt->uri_query);
|
|
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_length, '/');
|
|
PRINTF("Location-Path [%.*s]\n", coap_pkt->location_path_len,
|
|
coap_pkt->location_path);
|
|
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_length, '&');
|
|
PRINTF("Location-Query [%.*s]\n", coap_pkt->location_query_len,
|
|
coap_pkt->location_query);
|
|
break;
|
|
|
|
case COAP_OPTION_OBSERVE:
|
|
coap_pkt->observe = coap_parse_int_option(current_option,
|
|
option_length);
|
|
PRINTF("Observe [%lu]\n", coap_pkt->observe);
|
|
break;
|
|
case COAP_OPTION_BLOCK2:
|
|
coap_pkt->block2_num = coap_parse_int_option(current_option,
|
|
option_length);
|
|
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_length);
|
|
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_SIZE2:
|
|
coap_pkt->size2 = coap_parse_int_option(current_option, option_length);
|
|
PRINTF("Size2 [%lu]\n", coap_pkt->size2);
|
|
break;
|
|
case COAP_OPTION_SIZE1:
|
|
coap_pkt->size1 = coap_parse_int_option(current_option, option_length);
|
|
PRINTF("Size1 [%lu]\n", coap_pkt->size1);
|
|
break;
|
|
default:
|
|
PRINTF("unknown (%u)\n", option_number);
|
|
/* check if critical (odd) */
|
|
if(option_number & 1) {
|
|
coap_error_message = "Unsupported critical option";
|
|
return BAD_OPTION_4_02;
|
|
}
|
|
}
|
|
|
|
current_option += option_length;
|
|
} /* for */
|
|
PRINTF("-Done parsing-------\n");
|
|
|
|
return NO_ERROR;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/*- REST Engine API ---------------------------------------------------------*/
|
|
/*---------------------------------------------------------------------------*/
|
|
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;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
coap_set_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);
|
|
|
|
return coap_pkt->token_len;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/*- CoAP REST Implementation API --------------------------------------------*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_content_format(void *packet, unsigned int *format)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
if(!IS_OPTION(coap_pkt, COAP_OPTION_CONTENT_FORMAT)) {
|
|
return 0;
|
|
}
|
|
*format = coap_pkt->content_format;
|
|
return 1;
|
|
}
|
|
int
|
|
coap_set_header_content_format(void *packet, unsigned int format)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
coap_pkt->content_format = (coap_content_format_t)format;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_CONTENT_FORMAT);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_accept(void *packet, unsigned int *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 1;
|
|
}
|
|
int
|
|
coap_set_header_accept(void *packet, unsigned int accept)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
coap_pkt->accept = (coap_content_format_t)accept;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_ACCEPT);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
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_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;
|
|
|
|
/*TODO Provide alternative that sets Proxy-Scheme and Uri-* options and provide er-coap-conf define */
|
|
|
|
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;
|
|
|
|
if(coap_pkt->location_path_len > 0) {
|
|
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_size2(void *packet, uint32_t *size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
if(!IS_OPTION(coap_pkt, COAP_OPTION_SIZE2)) {
|
|
return 0;
|
|
}
|
|
*size = coap_pkt->size2;
|
|
return 1;
|
|
}
|
|
int
|
|
coap_set_header_size2(void *packet, uint32_t size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
coap_pkt->size2 = size;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_SIZE2);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
coap_get_header_size1(void *packet, uint32_t *size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
if(!IS_OPTION(coap_pkt, COAP_OPTION_SIZE1)) {
|
|
return 0;
|
|
}
|
|
*size = coap_pkt->size1;
|
|
return 1;
|
|
}
|
|
int
|
|
coap_set_header_size1(void *packet, uint32_t size)
|
|
{
|
|
coap_packet_t *const coap_pkt = (coap_packet_t *)packet;
|
|
|
|
coap_pkt->size1 = size;
|
|
SET_OPTION(coap_pkt, COAP_OPTION_SIZE1);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
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;
|
|
|
|
coap_pkt->payload = (uint8_t *)payload;
|
|
coap_pkt->payload_len = MIN(REST_MAX_CHUNK_SIZE, length);
|
|
|
|
return coap_pkt->payload_len;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|