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contiki/apps/er-coap-07/er-coap-07.c
Matthias Kovatsch f71b0bc794 Added Erbium REST engine with new CoAP implementation
2011-09-14 16:33:01 +02:00

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/*
* Copyright (c) 2011, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* An implementation of the Constrained Application Protocol (draft 07)
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include "contiki.h"
#include "contiki-net.h"
#include <string.h>
#include <stdio.h>
#include "er-coap-07.h"
#include "er-coap-07-transactions.h"
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#define PRINT6ADDR(addr) PRINTF("[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
#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])
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#define PRINTLLADDR(addr)
#endif
/*-----------------------------------------------------------------------------------*/
/*- Variables -----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
static struct uip_udp_conn *udp_conn = NULL;
static uint16_t current_tid = 0;
coap_status_t coap_error_code = NO_ERROR;
char *coap_error_message = "";
/*-----------------------------------------------------------------------------------*/
/*- LOCAL HELP FUNCTIONS ------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
static
uint16_t
log_2(uint16_t value)
{
uint16_t result = 0;
do {
value = value >> 1;
result++;
} while (value);
return result ? result - 1 : result;
}
/*-----------------------------------------------------------------------------------*/
static
uint32_t
parse_int_option(uint8_t *bytes, uint16_t length)
{
uint32_t var = 0;
int i = 0;
while (i<length)
{
var <<= 8;
var |= 0xFF & bytes[i++];
}
return var;
}
static
size_t
set_option_header(int delta, size_t length, uint8_t *buffer)
{
if (length<15)
{
buffer[0] = (0x0F & length) | (0xF0 & delta<<4);
return 1;
}
else
{
buffer[0] = 0x0F | (0xF0 & delta<<4);
buffer[1] = 0xFF & (length - 15);
return 2;
}
}
/*-----------------------------------------------------------------------------------*/
static
size_t
insert_option_fence_posts(int number, int *current_number, uint8_t *buffer)
{
size_t i = 0;
while (number-*current_number > 15)
{
uint8_t delta = COAP_OPTION_FENCE_POST - (*current_number%COAP_OPTION_FENCE_POST);
set_option_header(delta, 0, &buffer[i++]);
*current_number += delta;
PRINTF("OPTION FENCE POST delta %u\n", delta);
}
return i;
}
/*-----------------------------------------------------------------------------------*/
static
size_t
serialize_int_option(int number, int current_number, uint8_t *buffer, uint32_t value)
{
/* Insert fence-posts for large deltas */
size_t i = insert_option_fence_posts(number, &current_number, buffer);
size_t start_i = i;
uint8_t *option = &buffer[i];
if (0xFF000000 & value) buffer[++i] = (uint8_t) (value>>24);
if (0x00FF0000 & value) buffer[++i] = (uint8_t) (value>>16);
if (0x0000FF00 & value) buffer[++i] = (uint8_t) (value>>8);
if (0x000000FF & value) buffer[++i] = (uint8_t) value;
i += set_option_header(number - current_number, i-start_i, option);
PRINTF("OPTION type %u, delta %u, len %u\n", number, number - current_number, i-start_i);
return i;
}
/*-----------------------------------------------------------------------------------*/
/*
* Pass the char to split the string at in split_option and receive the number of options in split_option on return.
*/
static
size_t
serialize_array_option(int number, int current_number, uint8_t *buffer, uint8_t *array, size_t length, uint8_t *split_option)
{
/* Insert fence-posts for large deltas */
size_t i = insert_option_fence_posts(number, &current_number, buffer);
if (split_option!=NULL)
{
int j;
uint8_t *part_start = array;
uint8_t *part_end = NULL;
size_t temp_length;
char split_char = *split_option;
*split_option = 0; /* Ensure reflecting the created option count */
for (j = 0; j<=length; ++j)
{
if (array[j]==split_char || j==length)
{
part_end = array + j;
temp_length = part_end-part_start;
i += set_option_header(number - current_number, temp_length, &buffer[i]);
memcpy(&buffer[i], part_start, temp_length);
i += temp_length;
PRINTF("OPTION type %u, delta %u, len %u, part [%.*s]\n", number, number - current_number, i, temp_length, part_start);
++(*split_option);
++j; /* skip the slash */
current_number = number;
while( array[j]=='/') ++j;
part_start = array + j;
}
} /* for */
}
else
{
i += set_option_header(number - current_number, length, &buffer[i]);
memcpy(&buffer[i], array, length);
i += length;
PRINTF("OPTION type %u, delta %u, len %u\n", number, number - current_number, i);
}
return i;
}
/*-----------------------------------------------------------------------------------*/
static
void
coap_merge_multi_option(char **dst, size_t *dst_len, uint8_t *option, size_t option_len, char separator)
{
/* Merge multiple options. */
if (*dst_len > 0)
{
(*dst)[*dst_len] = separator;
*dst_len += 1;
/* memmove handles 2-byte option headers */
memmove((*dst)+(*dst_len), option, option_len);
*dst_len += option_len;
}
else
{
*dst = (char *) option; /* thus pointer pointer */
*dst_len = option_len;
}
}
/*-----------------------------------------------------------------------------------*/
static
int
coap_get_variable(const char *buffer, size_t length, const char *name, const char **output)
{
const char *start = NULL;
const char *end = NULL;
const char *value_end = NULL;
size_t name_len = 0;
/*initialize the output buffer first*/
*output = 0;
name_len = strlen(name);
end = buffer + length;
for (start = buffer; start + name_len < end; ++start){
if ((start == buffer || start[-1] == '&') && start[name_len] == '=' &&
strncmp(name, start, name_len)==0) {
/* Point start to variable value */
start += name_len + 1;
/* Point end to the end of the value */
value_end = (const char *) memchr(start, '&', end - start);
if (value_end == NULL) {
value_end = end;
}
*output = start;
return (value_end - start);
}
}
return 0;
}
/*-----------------------------------------------------------------------------------*/
/*- MEASSAGE SENDING ----------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
void
coap_init_connection(uint16_t port)
{
/* new connection with remote host */
udp_conn = udp_new(NULL, 0, NULL);
udp_bind(udp_conn, port);
PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
/* Initialize transaction ID. */
current_tid = random_rand();
}
/*-----------------------------------------------------------------------------------*/
uint16_t
coap_get_tid()
{
return ++current_tid;
}
/*-----------------------------------------------------------------------------------*/
/*- MEASSAGE PROCESSING -------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
void
coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t tid)
{
/* Important thing */
memset(packet, 0, sizeof(coap_packet_t));
((coap_packet_t *)packet)->type = type;
((coap_packet_t *)packet)->code = code;
((coap_packet_t *)packet)->tid = tid;
}
/*-----------------------------------------------------------------------------------*/
size_t
coap_serialize_message(void *packet, uint8_t *buffer)
{
/* Initialize */
((coap_packet_t *)packet)->buffer = buffer;
((coap_packet_t *)packet)->version = 1;
((coap_packet_t *)packet)->option_count = 0;
/* serialize options */
uint8_t *option = ((coap_packet_t *)packet)->buffer + COAP_HEADER_LEN;
int current_number = 0;
PRINTF("-Serializing options-\n");
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_CONTENT_TYPE)) {
PRINTF("Content-Type [%u]\n", ((coap_packet_t *)packet)->content_type);
option += serialize_int_option(COAP_OPTION_CONTENT_TYPE, current_number, option, ((coap_packet_t *)packet)->content_type);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_CONTENT_TYPE;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_MAX_AGE)) {
PRINTF("Max-Age [%lu]\n", ((coap_packet_t *)packet)->max_age);
option += serialize_int_option(COAP_OPTION_MAX_AGE, current_number, option, ((coap_packet_t *)packet)->max_age);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_MAX_AGE;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_PROXY_URI)) {
PRINTF("Proxy-Uri [%.*s]\n", ((coap_packet_t *)packet)->proxy_uri_len, ((coap_packet_t *)packet)->proxy_uri);
int length = ((coap_packet_t *)packet)->proxy_uri_len;
int j = 0;
while (length>0)
{
option += serialize_array_option(COAP_OPTION_PROXY_URI, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->proxy_uri + j*270, MIN(270, length), NULL);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_PROXY_URI;
++j;
length -= 270;
}
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_ETAG)) {
PRINTF("ETag %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", ((coap_packet_t *)packet)->etag_len,
((coap_packet_t *)packet)->etag[0],
((coap_packet_t *)packet)->etag[1],
((coap_packet_t *)packet)->etag[2],
((coap_packet_t *)packet)->etag[3],
((coap_packet_t *)packet)->etag[4],
((coap_packet_t *)packet)->etag[5],
((coap_packet_t *)packet)->etag[6],
((coap_packet_t *)packet)->etag[7]
); /*FIXME always prints 8 bytes */
option += serialize_array_option(COAP_OPTION_ETAG, current_number, option, ((coap_packet_t *)packet)->etag, ((coap_packet_t *)packet)->etag_len, NULL);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_ETAG;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_HOST)) {
PRINTF("Uri-Host [%.*s]\n", ((coap_packet_t *)packet)->uri_host_len, ((coap_packet_t *)packet)->uri_host);
option += serialize_array_option(COAP_OPTION_URI_HOST, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->uri_host, ((coap_packet_t *)packet)->uri_host_len, NULL);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_URI_HOST;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH)) {
PRINTF("Location [%.*s]\n", ((coap_packet_t *)packet)->location_path_len, ((coap_packet_t *)packet)->location_path);
uint8_t split_options = '/';
option += serialize_array_option(COAP_OPTION_LOCATION_PATH, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->location_path, ((coap_packet_t *)packet)->location_path_len, &split_options);
((coap_packet_t *)packet)->option_count += split_options;
current_number = COAP_OPTION_LOCATION_PATH;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_PORT)) {
PRINTF("Uri-Port [%u]\n", ((coap_packet_t *)packet)->uri_port);
option += serialize_int_option(COAP_OPTION_URI_PORT, current_number, option, ((coap_packet_t *)packet)->uri_port);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_URI_PORT;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_QUERY)) {
PRINTF("Location-Query [%.*s]\n", ((coap_packet_t *)packet)->location_query_len, ((coap_packet_t *)packet)->location_query);
uint8_t split_options = '&';
option += serialize_array_option(COAP_OPTION_LOCATION_QUERY, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->location_query, ((coap_packet_t *)packet)->location_query_len, &split_options);
((coap_packet_t *)packet)->option_count += split_options;
current_number = COAP_OPTION_LOCATION_QUERY;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_PATH)) {
PRINTF("Uri-Path [%.*s]\n", ((coap_packet_t *)packet)->uri_path_len, ((coap_packet_t *)packet)->uri_path);
uint8_t split_options = '/';
option += serialize_array_option(COAP_OPTION_URI_PATH, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->uri_path, ((coap_packet_t *)packet)->uri_path_len, &split_options);
((coap_packet_t *)packet)->option_count += split_options;
current_number = COAP_OPTION_URI_PATH;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_OBSERVE)) {
PRINTF("Observe [%u]\n", ((coap_packet_t *)packet)->observe);
option += serialize_int_option(COAP_OPTION_OBSERVE, current_number, option, ((coap_packet_t *)packet)->observe);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_OBSERVE;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_TOKEN)) {
PRINTF("Token %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", ((coap_packet_t *)packet)->token_len,
((coap_packet_t *)packet)->token[0],
((coap_packet_t *)packet)->token[1],
((coap_packet_t *)packet)->token[2],
((coap_packet_t *)packet)->token[3],
((coap_packet_t *)packet)->token[4],
((coap_packet_t *)packet)->token[5],
((coap_packet_t *)packet)->token[6],
((coap_packet_t *)packet)->token[7]
); /*FIXME always prints 8 bytes */
option += serialize_array_option(COAP_OPTION_TOKEN, current_number, option, ((coap_packet_t *)packet)->token, ((coap_packet_t *)packet)->token_len, NULL);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_TOKEN;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_ACCEPT)) {
int i;
for (i=0; i<((coap_packet_t *)packet)->accept_num; ++i)
{
PRINTF("Accept [%u]\n", ((coap_packet_t *)packet)->accept[i]);
option += serialize_int_option(COAP_OPTION_ACCEPT, current_number, option, (uint32_t)((coap_packet_t *)packet)->accept[i]);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_ACCEPT;
}
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_MATCH)) {
PRINTF("If-Match [FIXME]\n");
option += serialize_array_option(COAP_OPTION_IF_MATCH, current_number, option, ((coap_packet_t *)packet)->if_match, ((coap_packet_t *)packet)->if_match_len, NULL);
((coap_packet_t *)packet)->option_count += 1;
current_number = COAP_OPTION_IF_MATCH;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_QUERY)) {
PRINTF("Uri-Query [%.*s]\n", ((coap_packet_t *)packet)->uri_query_len, ((coap_packet_t *)packet)->uri_query);
uint8_t split_options = '&';
option += serialize_array_option(COAP_OPTION_URI_QUERY, current_number, option, (uint8_t *) ((coap_packet_t *)packet)->uri_query, ((coap_packet_t *)packet)->uri_query_len, &split_options);
((coap_packet_t *)packet)->option_count += split_options + (COAP_OPTION_URI_QUERY-current_number)/COAP_OPTION_FENCE_POST;
current_number = COAP_OPTION_URI_QUERY;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK2))
{
PRINTF("Block2 [%lu%s (%u B/blk)]\n", ((coap_packet_t *)packet)->block2_num, ((coap_packet_t *)packet)->block2_more ? "+" : "", ((coap_packet_t *)packet)->block2_size);
uint32_t block = ((coap_packet_t *)packet)->block2_num << 4;
if (((coap_packet_t *)packet)->block2_more) block |= 0x8;
block |= 0xF & log_2(((coap_packet_t *)packet)->block2_size/16);
PRINTF("Block2 encoded: 0x%lX\n", block);
option += serialize_int_option(COAP_OPTION_BLOCK2, current_number, option, block);
((coap_packet_t *)packet)->option_count += 1 + (COAP_OPTION_BLOCK2-current_number)/COAP_OPTION_FENCE_POST;
current_number = COAP_OPTION_BLOCK2;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK1))
{
PRINTF("Block1 [%lu%s (%u B/blk)]\n", ((coap_packet_t *)packet)->block1_num, ((coap_packet_t *)packet)->block1_more ? "+" : "", ((coap_packet_t *)packet)->block1_size);
uint32_t block = ((coap_packet_t *)packet)->block1_num << 4;
if (((coap_packet_t *)packet)->block1_more) block |= 0x8;
block |= 0xF & log_2(((coap_packet_t *)packet)->block1_size/16);
PRINTF("Block1 encoded: 0x%lX\n", block);
option += serialize_int_option(COAP_OPTION_BLOCK1, current_number, option, block);
((coap_packet_t *)packet)->option_count += 1 + (COAP_OPTION_BLOCK1-current_number)/COAP_OPTION_FENCE_POST;
current_number = COAP_OPTION_BLOCK1;
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_NONE_MATCH)) {
PRINTF("If-None-Match\n");
option += serialize_int_option(COAP_OPTION_IF_NONE_MATCH, current_number, option, 0);
((coap_packet_t *)packet)->option_count += 1 + (COAP_OPTION_IF_NONE_MATCH-current_number)/COAP_OPTION_FENCE_POST;
current_number = COAP_OPTION_IF_NONE_MATCH;
}
/* pack payload */
if ((option - ((coap_packet_t *)packet)->buffer)<=COAP_MAX_HEADER_SIZE)
{
memmove(option, ((coap_packet_t *)packet)->payload, ((coap_packet_t *)packet)->payload_len);
}
else
{
/* An error occured. Caller must check for !=0. */
((coap_packet_t *)packet)->buffer = NULL;
coap_error_message = "Serialized header exceeds COAP_MAX_HEADER_SIZE";
return 0;
}
/* set header fields */
((coap_packet_t *)packet)->buffer[0] = 0x00;
((coap_packet_t *)packet)->buffer[0] |= COAP_HEADER_VERSION_MASK & (((coap_packet_t *)packet)->version)<<COAP_HEADER_VERSION_POSITION;
((coap_packet_t *)packet)->buffer[0] |= COAP_HEADER_TYPE_MASK & (((coap_packet_t *)packet)->type)<<COAP_HEADER_TYPE_POSITION;
((coap_packet_t *)packet)->buffer[0] |= COAP_HEADER_OPTION_COUNT_MASK & (((coap_packet_t *)packet)->option_count)<<COAP_HEADER_OPTION_COUNT_POSITION;
((coap_packet_t *)packet)->buffer[1] = ((coap_packet_t *)packet)->code;
((coap_packet_t *)packet)->buffer[2] = 0xFF & (((coap_packet_t *)packet)->tid)>>8;
((coap_packet_t *)packet)->buffer[3] = 0xFF & ((coap_packet_t *)packet)->tid;
PRINTF("-Done %u options, header len %u, payload len %u-\n", ((coap_packet_t *)packet)->option_count, option - buffer, ((coap_packet_t *)packet)->payload_len);
return (option - buffer) + ((coap_packet_t *)packet)->payload_len; /* packet length */
}
/*-----------------------------------------------------------------------------------*/
void
coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length)
{
/*configure connection to reply to client*/
uip_ipaddr_copy(&udp_conn->ripaddr, addr);
udp_conn->rport = port;
uip_udp_packet_send(udp_conn, data, length);
PRINTF("-sent UDP datagram (%u)-\n", length);
/* Restore server connection to allow data from any node */
memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
udp_conn->rport = 0;
}
/*-----------------------------------------------------------------------------------*/
coap_status_t
coap_parse_message(void *packet, uint8_t *data, uint16_t data_len)
{
/* Initialize packet */
memset(packet, 0, sizeof(coap_packet_t));
/* pointer to packet bytes */
((coap_packet_t *)packet)->buffer = data;
/* parse header fields */
((coap_packet_t *)packet)->version = (COAP_HEADER_VERSION_MASK & ((coap_packet_t *)packet)->buffer[0])>>COAP_HEADER_VERSION_POSITION;
((coap_packet_t *)packet)->type = (COAP_HEADER_TYPE_MASK & ((coap_packet_t *)packet)->buffer[0])>>COAP_HEADER_TYPE_POSITION;
((coap_packet_t *)packet)->option_count = (COAP_HEADER_OPTION_COUNT_MASK & ((coap_packet_t *)packet)->buffer[0])>>COAP_HEADER_OPTION_COUNT_POSITION;
((coap_packet_t *)packet)->code = ((coap_packet_t *)packet)->buffer[1];
((coap_packet_t *)packet)->tid = ((coap_packet_t *)packet)->buffer[2]<<8 | ((coap_packet_t *)packet)->buffer[3];
if (((coap_packet_t *)packet)->version != 1)
{
coap_error_message = "CoAP version must be 1";
return BAD_REQUEST_4_00;
}
/* parse options */
((coap_packet_t *)packet)->options = 0x0000;
uint8_t *current_option = data + COAP_HEADER_LEN;
if (((coap_packet_t *)packet)->option_count)
{
uint8_t option_index = 0;
uint8_t current_number = 0;
size_t option_len = 0;
PRINTF("-Parsing %u options-\n", ((coap_packet_t *)packet)->option_count);
for (option_index=0; option_index < ((coap_packet_t *)packet)->option_count; ++option_index) {
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]) < 15 ? (0x0F & current_option[0]) : current_option[1] + 15);
if ((0x0F & current_option[0]) < 15) {
option_len = 0x0F & current_option[0];
current_option += 1;
} else {
option_len = current_option[1] + 15;
current_option += 2;
}
SET_OPTION((coap_packet_t *)packet, current_number);
switch (current_number) {
case COAP_OPTION_CONTENT_TYPE:
((coap_packet_t *)packet)->content_type = parse_int_option(current_option, option_len);
PRINTF("Content-Type [%u]\n", ((coap_packet_t *)packet)->content_type);
break;
case COAP_OPTION_MAX_AGE:
((coap_packet_t *)packet)->max_age = parse_int_option(current_option, option_len);
PRINTF("Max-Age [%lu]\n", ((coap_packet_t *)packet)->max_age);
break;
case COAP_OPTION_PROXY_URI:
/*FIXME check for own end-point */
((coap_packet_t *)packet)->proxy_uri = (char *) current_option;
((coap_packet_t *)packet)->proxy_uri_len = option_len;
/*TODO length > 270 not implemented (actually not required) */
PRINTF("Proxy-Uri NOT IMPLEMENTED [%.*s]\n", ((coap_packet_t *)packet)->proxy_uri_len, ((coap_packet_t *)packet)->proxy_uri);
coap_error_message = "This is a constrained server (Contiki)";
return PROXYING_NOT_SUPPORTED_5_05;
break;
case COAP_OPTION_ETAG:
((coap_packet_t *)packet)->etag_len = MIN(COAP_ETAG_LEN, option_len);
memcpy(((coap_packet_t *)packet)->etag, current_option, ((coap_packet_t *)packet)->etag_len);
PRINTF("ETag %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", ((coap_packet_t *)packet)->etag_len,
((coap_packet_t *)packet)->etag[0],
((coap_packet_t *)packet)->etag[1],
((coap_packet_t *)packet)->etag[2],
((coap_packet_t *)packet)->etag[3],
((coap_packet_t *)packet)->etag[4],
((coap_packet_t *)packet)->etag[5],
((coap_packet_t *)packet)->etag[6],
((coap_packet_t *)packet)->etag[7]
); /*FIXME always prints 8 bytes */
break;
case COAP_OPTION_URI_HOST:
((coap_packet_t *)packet)->uri_host = (char *) current_option;
((coap_packet_t *)packet)->uri_host_len = option_len;
PRINTF("Uri-Host [%.*s]\n", ((coap_packet_t *)packet)->uri_host_len, ((coap_packet_t *)packet)->uri_host);
break;
case COAP_OPTION_LOCATION_PATH:
coap_merge_multi_option(&(((coap_packet_t *)packet)->location_path), &(((coap_packet_t *)packet)->location_path_len), current_option, option_len, '/');
PRINTF("Location-Path [%.*s]\n", ((coap_packet_t *)packet)->location_path_len, ((coap_packet_t *)packet)->location_path);
break;
case COAP_OPTION_URI_PORT:
((coap_packet_t *)packet)->uri_port = parse_int_option(current_option, option_len);
PRINTF("Uri-Port [%u]\n", ((coap_packet_t *)packet)->uri_port);
break;
case COAP_OPTION_LOCATION_QUERY:
coap_merge_multi_option(&(((coap_packet_t *)packet)->location_query), &(((coap_packet_t *)packet)->location_query_len), current_option, option_len, '&');
PRINTF("Location-Query [%.*s]\n", ((coap_packet_t *)packet)->location_query_len, ((coap_packet_t *)packet)->location_query);
break;
case COAP_OPTION_URI_PATH:
coap_merge_multi_option(&(((coap_packet_t *)packet)->uri_path), &(((coap_packet_t *)packet)->uri_path_len), current_option, option_len, '/');
PRINTF("Uri-Path [%.*s]\n", ((coap_packet_t *)packet)->uri_path_len, ((coap_packet_t *)packet)->uri_path);
break;
case COAP_OPTION_OBSERVE:
((coap_packet_t *)packet)->observe = parse_int_option(current_option, option_len);
PRINTF("Observe [%u]\n", ((coap_packet_t *)packet)->observe);
break;
case COAP_OPTION_TOKEN:
((coap_packet_t *)packet)->token_len = MIN(COAP_TOKEN_LEN, option_len);
memcpy(((coap_packet_t *)packet)->token, current_option, ((coap_packet_t *)packet)->token_len);
PRINTF("Token %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", ((coap_packet_t *)packet)->token_len,
((coap_packet_t *)packet)->token[0],
((coap_packet_t *)packet)->token[1],
((coap_packet_t *)packet)->token[2],
((coap_packet_t *)packet)->token[3],
((coap_packet_t *)packet)->token[4],
((coap_packet_t *)packet)->token[5],
((coap_packet_t *)packet)->token[6],
((coap_packet_t *)packet)->token[7]
); /*FIXME always prints 8 bytes */
break;
case COAP_OPTION_ACCEPT:
if (((coap_packet_t *)packet)->accept_num < COAP_MAX_ACCEPT_NUM)
{
((coap_packet_t *)packet)->accept[((coap_packet_t *)packet)->accept_num] = parse_int_option(current_option, option_len);
((coap_packet_t *)packet)->accept_num += 1;
PRINTF("Accept [%u]\n", ((coap_packet_t *)packet)->content_type);
}
break;
case COAP_OPTION_IF_MATCH:
/*FIXME support multiple ETags */
((coap_packet_t *)packet)->if_match_len = MIN(COAP_ETAG_LEN, option_len);
memcpy(((coap_packet_t *)packet)->if_match, current_option, ((coap_packet_t *)packet)->if_match_len);
PRINTF("If-Match %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", ((coap_packet_t *)packet)->if_match_len,
((coap_packet_t *)packet)->if_match[0],
((coap_packet_t *)packet)->if_match[1],
((coap_packet_t *)packet)->if_match[2],
((coap_packet_t *)packet)->if_match[3],
((coap_packet_t *)packet)->if_match[4],
((coap_packet_t *)packet)->if_match[5],
((coap_packet_t *)packet)->if_match[6],
((coap_packet_t *)packet)->if_match[7]
); /*FIXME always prints 8 bytes */
break;
case COAP_OPTION_FENCE_POST:
PRINTF("Fence-Post\n");
break;
case COAP_OPTION_URI_QUERY:
coap_merge_multi_option(&(((coap_packet_t *)packet)->uri_query), &(((coap_packet_t *)packet)->uri_query_len), current_option, option_len, '&');
PRINTF("Uri-Query [%.*s]\n", ((coap_packet_t *)packet)->uri_query_len, ((coap_packet_t *)packet)->uri_query);
break;
case COAP_OPTION_BLOCK2:
((coap_packet_t *)packet)->block2_num = parse_int_option(current_option, option_len);
((coap_packet_t *)packet)->block2_more = (((coap_packet_t *)packet)->block2_num & 0x08)>>3;
((coap_packet_t *)packet)->block2_size = 16 << (((coap_packet_t *)packet)->block2_num & 0x07);
((coap_packet_t *)packet)->block2_offset = (((coap_packet_t *)packet)->block2_num & ~0x0F)<<(((coap_packet_t *)packet)->block2_num & 0x07);
((coap_packet_t *)packet)->block2_num >>= 4;
PRINTF("Block2 [%lu%s (%u B/blk)]\n", ((coap_packet_t *)packet)->block2_num, ((coap_packet_t *)packet)->block2_more ? "+" : "", ((coap_packet_t *)packet)->block2_size);
break;
case COAP_OPTION_BLOCK1:
PRINTF("Block1 NOT IMPLEMENTED\n");
/*TODO implement */
coap_error_message = "Blockwise POST/PUT not supported";
return NOT_IMPLEMENTED_5_01;
break;
case COAP_OPTION_IF_NONE_MATCH:
((coap_packet_t *)packet)->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_packet_t *)packet)->payload = current_option;
((coap_packet_t *)packet)->payload_len = data_len - (((coap_packet_t *)packet)->payload - data);
return NO_ERROR;
}
/*-----------------------------------------------------------------------------------*/
/*- REST FRAMEWORK FUNCTIONS --------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
int
coap_get_query_variable(void *packet, const char *name, const char **output)
{
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_QUERY)) {
return coap_get_variable(((coap_packet_t *)packet)->uri_query, ((coap_packet_t *)packet)->uri_query_len, name, output);
}
return 0;
}
int
coap_get_post_variable(void *packet, const char *name, const char **output)
{
if (((coap_packet_t *)packet)->payload_len) {
return coap_get_variable((const char *)((coap_packet_t *)packet)->payload, ((coap_packet_t *)packet)->payload_len, name, output);
}
return 0;
}
/*-----------------------------------------------------------------------------------*/
/*- HEADER OPTION GETTERS AND SETTERS -----------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
unsigned int
coap_get_header_content_type(void *packet)
{
return ((coap_packet_t *)packet)->content_type;
}
int
coap_set_header_content_type(void *packet, unsigned int content_type)
{
((coap_packet_t *)packet)->content_type = (coap_content_type_t) content_type;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_CONTENT_TYPE);
return 1;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_accept(void *packet, uint16_t **accept)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_ACCEPT)) return 0;
*accept = ((coap_packet_t *)packet)->accept;
return ((coap_packet_t *)packet)->accept_num;
}
int
coap_set_header_accept(void *packet, uint16_t accept)
{
if (((coap_packet_t *)packet)->accept_num < COAP_MAX_ACCEPT_NUM)
{
((coap_packet_t *)packet)->accept[((coap_packet_t *)packet)->accept_num] = accept;
((coap_packet_t *)packet)->accept_num += 1;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_ACCEPT);
}
return ((coap_packet_t *)packet)->accept_num;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_max_age(void *packet, uint32_t *age)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_MAX_AGE)) {
*age = COAP_DEFAULT_MAX_AGE;
} else {
*age = ((coap_packet_t *)packet)->max_age;
}
return 1;
}
int
coap_set_header_max_age(void *packet, uint32_t age)
{
((coap_packet_t *)packet)->max_age = age;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_MAX_AGE);
return 1;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_etag(void *packet, const uint8_t **etag)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_ETAG)) return 0;
*etag = ((coap_packet_t *)packet)->etag;
return ((coap_packet_t *)packet)->etag_len;
}
int
coap_set_header_etag(void *packet, uint8_t *etag, size_t etag_len)
{
((coap_packet_t *)packet)->etag_len = MIN(COAP_ETAG_LEN, etag_len);
memcpy(((coap_packet_t *)packet)->etag, etag, ((coap_packet_t *)packet)->etag_len);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_ETAG);
return ((coap_packet_t *)packet)->etag_len;
}
/*-----------------------------------------------------------------------------------*/
/*FIXME support multiple ETags */
int
coap_get_header_if_match(void *packet, const uint8_t **etag)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_MATCH)) return 0;
*etag = ((coap_packet_t *)packet)->if_match;
return ((coap_packet_t *)packet)->if_match_len;
}
int
coap_set_header_if_match(void *packet, uint8_t *etag, size_t etag_len)
{
((coap_packet_t *)packet)->if_match_len = MIN(COAP_ETAG_LEN, etag_len);
memcpy(((coap_packet_t *)packet)->if_match, etag, ((coap_packet_t *)packet)->if_match_len);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_MATCH);
return ((coap_packet_t *)packet)->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)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_TOKEN)) return 0;
*token = ((coap_packet_t *)packet)->token;
return ((coap_packet_t *)packet)->token_len;
}
int
coap_set_header_token(void *packet, uint8_t *token, size_t token_len)
{
((coap_packet_t *)packet)->token_len = MIN(COAP_TOKEN_LEN, token_len);
memcpy(((coap_packet_t *)packet)->token, token, ((coap_packet_t *)packet)->token_len);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_TOKEN);
return ((coap_packet_t *)packet)->token_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_proxy_uri(void *packet, const char **uri)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_PROXY_URI)) return 0;
*uri = ((coap_packet_t *)packet)->proxy_uri;
return ((coap_packet_t *)packet)->proxy_uri_len;
}
int
coap_set_header_proxy_uri(void *packet, char *uri)
{
((coap_packet_t *)packet)->proxy_uri = uri;
((coap_packet_t *)packet)->proxy_uri_len = strlen(uri);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_PROXY_URI);
return ((coap_packet_t *)packet)->proxy_uri_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_uri_host(void *packet, const char **host)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_HOST)) return 0;
*host = ((coap_packet_t *)packet)->uri_host;
return ((coap_packet_t *)packet)->uri_host_len;
}
int
coap_set_header_uri_host(void *packet, char *host)
{
((coap_packet_t *)packet)->uri_host = host;
((coap_packet_t *)packet)->uri_host_len = strlen(host);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_HOST);
return ((coap_packet_t *)packet)->uri_host_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_uri_path(void *packet, const char **path)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_PATH)) return 0;
*path = ((coap_packet_t *)packet)->uri_path;
return ((coap_packet_t *)packet)->uri_path_len;
}
int
coap_set_header_uri_path(void *packet, char *path)
{
while (path[0]=='/') ++path;
((coap_packet_t *)packet)->uri_path = path;
((coap_packet_t *)packet)->uri_path_len = strlen(path);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_PATH);
return ((coap_packet_t *)packet)->uri_path_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_uri_query(void *packet, const char **query)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_QUERY)) return 0;
*query = ((coap_packet_t *)packet)->uri_query;
return ((coap_packet_t *)packet)->uri_query_len;
}
int
coap_set_header_uri_query(void *packet, char *query)
{
while (query[0]=='?') ++query;
((coap_packet_t *)packet)->uri_query = query;
((coap_packet_t *)packet)->uri_query_len = strlen(query);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_QUERY);
return ((coap_packet_t *)packet)->uri_query_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_location_path(void *packet, const char **path)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH)) return 0;
*path = ((coap_packet_t *)packet)->location_path;
return ((coap_packet_t *)packet)->location_path_len;
}
int
coap_set_header_location_path(void *packet, char *path)
{
char *query;
while (path[0]=='/') ++path;
if ((query = strchr(path, '?')))
{
coap_set_header_location_query(packet, query+1);
((coap_packet_t *)packet)->location_path_len = query - path;
}
else
{
((coap_packet_t *)packet)->location_path_len = strlen(path);
}
((coap_packet_t *)packet)->location_path = path;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH);
return ((coap_packet_t *)packet)->location_path_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_location_query(void *packet, const char **query)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_QUERY)) return 0;
*query = ((coap_packet_t *)packet)->location_query;
return ((coap_packet_t *)packet)->location_query_len;
}
int
coap_set_header_location_query(void *packet, char *query)
{
while (query[0]=='?') ++query;
((coap_packet_t *)packet)->location_query = query;
((coap_packet_t *)packet)->location_query_len = strlen(query);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_QUERY);
return ((coap_packet_t *)packet)->location_query_len;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_observe(void *packet, uint32_t *observe)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_OBSERVE)) return 0;
*observe = ((coap_packet_t *)packet)->observe;
return 1;
}
int
coap_set_header_observe(void *packet, uint32_t observe)
{
((coap_packet_t *)packet)->observe = observe;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_OBSERVE);
return 1;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_block2(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK2)) return 0;
/* pointers may be NULL to get only specific block parameters */
if (num!=NULL) *num = ((coap_packet_t *)packet)->block2_num;
if (more!=NULL) *more = ((coap_packet_t *)packet)->block2_more;
if (size!=NULL) *size = ((coap_packet_t *)packet)->block2_size;
if (offset!=NULL) *offset = ((coap_packet_t *)packet)->block2_offset;
return 1;
}
int
coap_set_header_block2(void *packet, uint32_t num, uint8_t more, uint16_t size)
{
if (size<16) return 0;
if (size>2048) return 0;
if (num>0x0FFFFF) return 0;
((coap_packet_t *)packet)->block2_num = num;
((coap_packet_t *)packet)->block2_more = more;
((coap_packet_t *)packet)->block2_size = size;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK2);
return 1;
}
/*-----------------------------------------------------------------------------------*/
int
coap_get_header_block1(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK1)) return 0;
/* pointers may be NULL to get only specific block parameters */
if (num!=NULL) *num = ((coap_packet_t *)packet)->block1_num;
if (more!=NULL) *more = ((coap_packet_t *)packet)->block1_more;
if (size!=NULL) *size = ((coap_packet_t *)packet)->block1_size;
if (offset!=NULL) *offset = ((coap_packet_t *)packet)->block1_offset;
return 1;
}
int
coap_set_header_block1(void *packet, uint32_t num, uint8_t more, uint16_t size)
{
if (size<16) return 0;
if (size>2048) return 0;
if (num>0x0FFFFF) return 0;
((coap_packet_t *)packet)->block1_num = num;
((coap_packet_t *)packet)->block1_more = more;
((coap_packet_t *)packet)->block1_size = size;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK1);
return 1;
}
/*-----------------------------------------------------------------------------------*/
/*- PAYLOAD -------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
int
coap_get_payload(void *packet, const uint8_t **payload)
{
if (((coap_packet_t *)packet)->payload) {
*payload = ((coap_packet_t *)packet)->payload;
return ((coap_packet_t *)packet)->payload_len;
} else {
*payload = NULL;
return 0;
}
}
int
coap_set_payload(void *packet, uint8_t *payload, size_t length)
{
PRINTF("setting payload (%u/%u)\n", length, REST_MAX_CHUNK_SIZE);
((coap_packet_t *)packet)->payload = payload;
((coap_packet_t *)packet)->payload_len = MIN(REST_MAX_CHUNK_SIZE, length);
return ((coap_packet_t *)packet)->payload_len;
}
/*-----------------------------------------------------------------------------------*/
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