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contiki/apps/er-coap-03/er-coap-03.c
Matthias Kovatsch 82884ab63f Fixed legacy CoAP versions.
2013-02-13 19:22:21 +01:00

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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 03)
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifdef CONTIKI_TARGET_NETSIM
#include <stdio.h>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#else
#include "contiki.h"
#include "contiki-net.h"
#include <string.h>
#include <stdio.h>
#endif
#include "er-coap-03.h"
#include "er-coap-03-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]", ((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])
#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
static struct uip_udp_conn *udp_conn = NULL;
static uint16_t current_tid = 0;
/*-----------------------------------------------------------------------------------*/
/*- 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
bytes_2_uint32(uint8_t *bytes, uint16_t length)
{
uint32_t var = 0;
int i = 0;
while (i<length)
{
var <<= 8;
var |= 0xFF & bytes[i++];
}
return var;
}
/*-----------------------------------------------------------------------------------*/
/* Unused in coap-03.
static
int
uint16_2_bytes(uint8_t *bytes, uint16_t var)
{
int i = 0;
if (0xFF00 & var) bytes[i++] = var>>8;
bytes[i++] = 0xFF & var;
return i;
}
*/
/*-----------------------------------------------------------------------------------*/
static
int
uint32_2_bytes(uint8_t *bytes, uint32_t var)
{
int i = 0;
if (0xFF000000 & var) bytes[i++] = (0xFF & var>>24);
if (0xFFFF0000 & var) bytes[i++] = (0xFF & var>>16);
if (0xFFFFFF00 & var) bytes[i++] = (0xFF & var>>8);
bytes[i++] = 0xFF & var;
return i;
}
/*-----------------------------------------------------------------------------------*/
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()
{
++current_tid;
PRINTF("Get TID %u\n", current_tid);
return current_tid;
}
/*-----------------------------------------------------------------------------------*/
void
coap_send_message(uip_ipaddr_t *addr, uint16_t port, const 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------\n Length: %u\n -----------------------\n", length);
/* Restore server connection to allow data from any node */
memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
udp_conn->rport = 0;
}
/*-----------------------------------------------------------------------------------*/
/*- MEASSAGE PROCESSING -------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
void
coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t tid)
{
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;
}
/*-----------------------------------------------------------------------------------*/
int
coap_serialize_message(void *packet, uint8_t *buffer)
{
((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;
size_t option_len = 0;
int index = 0;
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_CONTENT_TYPE)) {
((coap_header_option_t *)option)->s.delta = 1;
((coap_header_option_t *)option)->s.length = 1;
*(++option) = ((coap_packet_t *)packet)->content_type;
PRINTF("OPTION %u (type %u, len 1, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_CONTENT_TYPE, COAP_OPTION_CONTENT_TYPE - index);
PRINTF("Content-Type [%u]\n", ((coap_packet_t *)packet)->content_type);
index = COAP_OPTION_CONTENT_TYPE;
option += 1;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_MAX_AGE)) {
option_len = uint32_2_bytes(option+1, ((coap_packet_t *)packet)->max_age);
((coap_header_option_t *)option)->s.delta = COAP_OPTION_MAX_AGE - index;
((coap_header_option_t *)option)->s.length = option_len;
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_MAX_AGE, option_len, COAP_OPTION_MAX_AGE - index);
PRINTF("Max-Age [%lu]\n", ((coap_packet_t *)packet)->max_age);
index = COAP_OPTION_MAX_AGE;
option += 1 + option_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_ETAG)) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_ETAG - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->etag_len;
memcpy(++option, ((coap_packet_t *)packet)->etag, ((coap_packet_t *)packet)->etag_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_ETAG, ((coap_packet_t *)packet)->etag_len, COAP_OPTION_ETAG - index);
PRINTF("ETag %u [0x%02X", ((coap_packet_t *)packet)->etag_len, ((coap_packet_t *)packet)->etag[0]); /*FIXME always prints 4 bytes */
PRINTF("%02X", ((coap_packet_t *)packet)->etag[1]);
PRINTF("%02X", ((coap_packet_t *)packet)->etag[2]);
PRINTF("%02X", ((coap_packet_t *)packet)->etag[3]);
PRINTF("]\n");
index = COAP_OPTION_ETAG;
option += ((coap_packet_t *)packet)->etag_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_HOST)) {
if (((coap_packet_t *)packet)->uri_host_len<15) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_URI_HOST - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->uri_host_len;
option += 1;
} else {
((coap_header_option_t *)option)->l.delta = COAP_OPTION_URI_HOST - index;
((coap_header_option_t *)option)->s.length = 15;
((coap_header_option_t *)option)->l.length = ((coap_packet_t *)packet)->uri_host_len - 15;
option += 2;
}
memcpy(option, ((coap_packet_t *)packet)->uri_host, ((coap_packet_t *)packet)->uri_host_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_URI_HOST, ((coap_packet_t *)packet)->uri_host_len, COAP_OPTION_URI_HOST - index);
PRINTF("Uri-Auth [%.*s]\n", ((coap_packet_t *)packet)->uri_host_len, ((coap_packet_t *)packet)->uri_host);
index = COAP_OPTION_URI_HOST;
option += ((coap_packet_t *)packet)->uri_host_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH)) {
if (((coap_packet_t *)packet)->location_path_len<15) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_LOCATION_PATH - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->location_path_len;
option += 1;
} else {
((coap_header_option_t *)option)->l.delta = COAP_OPTION_LOCATION_PATH - index;
((coap_header_option_t *)option)->s.length = 15;
((coap_header_option_t *)option)->l.length = ((coap_packet_t *)packet)->location_path_len - 15;
option += 2;
}
memcpy(option, ((coap_packet_t *)packet)->location_path, ((coap_packet_t *)packet)->location_path_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_LOCATION_PATH, ((coap_packet_t *)packet)->location_path_len, COAP_OPTION_LOCATION_PATH - index);
PRINTF("Location [%.*s]\n", ((coap_packet_t *)packet)->location_path_len, ((coap_packet_t *)packet)->location_path);
index = COAP_OPTION_LOCATION_PATH;
option += ((coap_packet_t *)packet)->location_path_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_PATH)) {
if (((coap_packet_t *)packet)->uri_path_len<15) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_URI_PATH - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->uri_path_len;
option += 1;
} else {
((coap_header_option_t *)option)->l.delta = COAP_OPTION_URI_PATH - index;
((coap_header_option_t *)option)->s.length = 15;
((coap_header_option_t *)option)->l.length = ((coap_packet_t *)packet)->uri_path_len - 15;
option += 2;
}
memcpy(option, ((coap_packet_t *)packet)->uri_path, ((coap_packet_t *)packet)->uri_path_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_URI_PATH, ((coap_packet_t *)packet)->uri_path_len, COAP_OPTION_URI_PATH - index);
PRINTF("Uri-Path [%.*s]\n", ((coap_packet_t *)packet)->uri_path_len, ((coap_packet_t *)packet)->uri_path);
index = COAP_OPTION_URI_PATH;
option += ((coap_packet_t *)packet)->uri_path_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_OBSERVE)) {
option_len = uint32_2_bytes(option+1, ((coap_packet_t *)packet)->observe);
((coap_header_option_t *)option)->s.delta = COAP_OPTION_OBSERVE - index;
((coap_header_option_t *)option)->s.length = option_len;
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_OBSERVE, option_len, COAP_OPTION_OBSERVE - index);
PRINTF("Observe [%lu]\n", ((coap_packet_t *)packet)->observe);
index = COAP_OPTION_OBSERVE;
option += 1 + option_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_TOKEN)) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_TOKEN - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->token_len;
memcpy(++option, ((coap_packet_t *)packet)->token, ((coap_packet_t *)packet)->token_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_TOKEN, ((coap_packet_t *)packet)->token_len, COAP_OPTION_TOKEN - index);
PRINTF("Token %u [0x%02X%02X]\n", ((coap_packet_t *)packet)->token_len, ((coap_packet_t *)packet)->token[0], ((coap_packet_t *)packet)->token[1]); /*FIXME always prints 2 bytes */
index = COAP_OPTION_TOKEN;
option += ((coap_packet_t *)packet)->token_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK)) {
uint32_t block = ((coap_packet_t *)packet)->block_num << 4;
if (((coap_packet_t *)packet)->block_more) block |= 0x8;
block |= 0xF & log_2(((coap_packet_t *)packet)->block_size/16);
option_len = uint32_2_bytes(option+1, block);
((coap_header_option_t *)option)->s.delta = COAP_OPTION_BLOCK - index;
((coap_header_option_t *)option)->s.length = option_len;
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_BLOCK, option_len, COAP_OPTION_BLOCK - index);
PRINTF("Block [%lu%s (%u B/blk)]\n", ((coap_packet_t *)packet)->block_num, ((coap_packet_t *)packet)->block_more ? "+" : "", ((coap_packet_t *)packet)->block_size);
index = COAP_OPTION_BLOCK;
option += 1 + option_len;
++(((coap_packet_t *)packet)->option_count);
}
if (IS_OPTION((coap_packet_t *)packet, COAP_OPTION_URI_QUERY)) {
if (((coap_packet_t *)packet)->uri_query_len<15) {
((coap_header_option_t *)option)->s.delta = COAP_OPTION_URI_QUERY - index;
((coap_header_option_t *)option)->s.length = ((coap_packet_t *)packet)->uri_query_len;
option += 1;
} else {
((coap_header_option_t *)option)->l.delta = COAP_OPTION_URI_QUERY - index;
((coap_header_option_t *)option)->s.length = 15;
((coap_header_option_t *)option)->l.length = ((coap_packet_t *)packet)->uri_query_len - 15;
option += 2;
}
memcpy(option, ((coap_packet_t *)packet)->uri_query, ((coap_packet_t *)packet)->uri_query_len);
PRINTF("OPTION %u (type %u, len %u, delta %u): ", ((coap_packet_t *)packet)->option_count, COAP_OPTION_URI_QUERY, ((coap_packet_t *)packet)->uri_query_len, COAP_OPTION_URI_QUERY - index);
PRINTF("Uri-Query [%.*s]\n", ((coap_packet_t *)packet)->uri_query_len, ((coap_packet_t *)packet)->uri_query);
index = COAP_OPTION_URI_QUERY;
option += ((coap_packet_t *)packet)->uri_query_len;
++(((coap_packet_t *)packet)->option_count);
}
/* 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. */
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("Serialized %u options, header len %u, payload len %u\n", ((coap_packet_t *)packet)->option_count, option - ((coap_packet_t *)packet)->buffer, ((coap_packet_t *)packet)->payload_len);
return (option - ((coap_packet_t *)packet)->buffer) + ((coap_packet_t *)packet)->payload_len; /* packet length */
}
/*-----------------------------------------------------------------------------------*/
error_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];
/* parse options */
((coap_packet_t *)packet)->options = 0x0000;
coap_header_option_t *current_option = (coap_header_option_t *) (data + COAP_HEADER_LEN);
if (((coap_packet_t *)packet)->option_count) {
uint8_t option_index = 0;
uint8_t option_type = 0;
uint16_t option_len = 0;
uint8_t *option_data = NULL;
uint8_t *last_option = NULL;
for (option_index=0; option_index < ((coap_packet_t *)packet)->option_count; ++option_index) {
option_type += current_option->s.delta;
if (current_option->s.length<15) {
option_len = current_option->s.length;
option_data = ((uint8_t *) current_option) + 1;
} else {
option_len = current_option->l.length + 15;
option_data = ((uint8_t *) current_option) + 2;
}
PRINTF("OPTION %u (type %u, len %u, delta %u): ", option_index, option_type, option_len, current_option->s.delta);
SET_OPTION((coap_packet_t *)packet, option_type);
switch (option_type) {
case COAP_OPTION_CONTENT_TYPE:
((coap_packet_t *)packet)->content_type = option_data[0];
PRINTF("Content-Type [%u]\n", ((coap_packet_t *)packet)->content_type);
break;
case COAP_OPTION_MAX_AGE:
((coap_packet_t *)packet)->max_age = bytes_2_uint32(option_data, option_len);
PRINTF("Max-Age [%lu]\n", ((coap_packet_t *)packet)->max_age);
break;
case COAP_OPTION_ETAG:
((coap_packet_t *)packet)->etag_len = MIN(COAP_ETAG_LEN, option_len);
memcpy(((coap_packet_t *)packet)->etag, option_data, ((coap_packet_t *)packet)->etag_len);
PRINTF("ETag %u [0x%02X", ((coap_packet_t *)packet)->etag_len, ((coap_packet_t *)packet)->etag[0]); /*FIXME always prints 4 bytes */
PRINTF("%02X", ((coap_packet_t *)packet)->etag[1]);
PRINTF("%02X", ((coap_packet_t *)packet)->etag[2]);
PRINTF("%02X", ((coap_packet_t *)packet)->etag[3]);
PRINTF("]\n");
break;
case COAP_OPTION_URI_HOST:
((coap_packet_t *)packet)->uri_host = (char *) option_data;
((coap_packet_t *)packet)->uri_host_len = option_len;
PRINTF("Uri-Auth [%.*s]\n", ((coap_packet_t *)packet)->uri_host_len, ((coap_packet_t *)packet)->uri_host);
break;
case COAP_OPTION_LOCATION_PATH:
((coap_packet_t *)packet)->location_path = (char *) option_data;
((coap_packet_t *)packet)->location_path_len = option_len;
PRINTF("Location [%.*s]\n", ((coap_packet_t *)packet)->location_path_len, ((coap_packet_t *)packet)->location_path);
break;
case COAP_OPTION_URI_PATH:
((coap_packet_t *)packet)->uri_path = (char *) option_data;
((coap_packet_t *)packet)->uri_path_len = 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 = bytes_2_uint32(option_data, option_len);
PRINTF("Observe [%lu]\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, option_data, ((coap_packet_t *)packet)->token_len);
PRINTF("Token %u [0x%02X%02X]\n", ((coap_packet_t *)packet)->token_len, ((coap_packet_t *)packet)->token[0], ((coap_packet_t *)packet)->token[1]); /*FIXME always prints 2 bytes */
break;
case COAP_OPTION_BLOCK:
((coap_packet_t *)packet)->block_num = bytes_2_uint32(option_data, option_len);
((coap_packet_t *)packet)->block_more = (((coap_packet_t *)packet)->block_num & 0x08)>>3;
((coap_packet_t *)packet)->block_size = 16 << (((coap_packet_t *)packet)->block_num & 0x07);
((coap_packet_t *)packet)->block_offset = (((coap_packet_t *)packet)->block_num & ~0x0F)<<(((coap_packet_t *)packet)->block_num & 0x07);
((coap_packet_t *)packet)->block_num >>= 4;
PRINTF("Block [%lu%s (%u B/blk)]\n", ((coap_packet_t *)packet)->block_num, ((coap_packet_t *)packet)->block_more ? "+" : "", ((coap_packet_t *)packet)->block_size);
break;
case COAP_OPTION_NOOP:
PRINTF("Noop-Fencepost\n");
break;
case COAP_OPTION_URI_QUERY:
((coap_packet_t *)packet)->uri_query = (char *) option_data;
((coap_packet_t *)packet)->uri_query_len = option_len;
PRINTF("Uri-Query [%.*s]\n", ((coap_packet_t *)packet)->uri_query_len, ((coap_packet_t *)packet)->uri_query);
break;
default:
PRINTF("unknown (%u)\n", option_type);
if (option_type & 1)
{
return UNKNOWN_CRITICAL_OPTION;
}
}
/* terminate strings where possible */
if (last_option) {
last_option[0] = 0x00;
}
last_option = (uint8_t *) current_option;
current_option = (coap_header_option_t *) (option_data+option_len);
} /* for () */
} /* if (oc) */
((coap_packet_t *)packet)->payload = (uint8_t *) 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_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, const 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;
}
/*-----------------------------------------------------------------------------------*/
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, const 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_location(void *packet, const char **location)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH)) return 0;
*location = ((coap_packet_t *)packet)->location_path;
return ((coap_packet_t *)packet)->location_path_len;
}
int
coap_set_header_location(void *packet, const char *location)
{
while (location[0]=='/') ++location;
((coap_packet_t *)packet)->location_path = location;
((coap_packet_t *)packet)->location_path_len = strlen(location);
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_LOCATION_PATH);
return ((coap_packet_t *)packet)->location_path_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, const 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_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_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, const 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_block(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset)
{
if (!IS_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK)) return 0;
/* pointers may be NULL to get only specific block parameters */
if (num!=NULL) *num = ((coap_packet_t *)packet)->block_num;
if (more!=NULL) *more = ((coap_packet_t *)packet)->block_more;
if (size!=NULL) *size = ((coap_packet_t *)packet)->block_size;
if (offset!=NULL) *offset = ((coap_packet_t *)packet)->block_offset;
return 1;
}
int
coap_set_header_block(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)->block_num = num;
((coap_packet_t *)packet)->block_more = more;
((coap_packet_t *)packet)->block_size = size;
SET_OPTION((coap_packet_t *)packet, COAP_OPTION_BLOCK);
return 1;
}
/*-----------------------------------------------------------------------------------*/
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, const 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;
}
/*-----------------------------------------------------------------------------------*/
/*- 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, const void *payload, size_t length)
{
PRINTF("setting payload (%u/%u)\n", length, REST_MAX_CHUNK_SIZE);
((coap_packet_t *)packet)->payload = (uint8_t *) payload;
((coap_packet_t *)packet)->payload_len = MIN(REST_MAX_CHUNK_SIZE, length);
return ((coap_packet_t *)packet)->payload_len;
}
/*-----------------------------------------------------------------------------------*/
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