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er-coap.c
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er-coap.c
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/*
* Copyright (c) 2013, 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 (RFC).
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include <string.h>
#include <stdio.h>
#include "er-coap.h"
#include "er-coap-transactions.h"
#define COAP_DEBUG 0
#if COAP_DEBUG
#include <stdio.h>
#include <ip_addr.h>
#define PRINTF(...) printf(__VA_ARGS__)
#define PRINT6ADDR(addr) printf("%u:%u:%u:%u:%u:%u:%u:%u\n", \
(ntohl(ipaddr->addr[0]) >> 16) & 0xffff, \
ntohl(ipaddr->addr[0]) & 0xffff, \
(ntohl(ipaddr->addr[1]) >> 16) & 0xffff, \
ntohl(ipaddr->addr[1]) & 0xffff, \
(ntohl(ipaddr->addr[2]) >> 16) & 0xffff, \
ntohl(ipaddr->addr[2]) & 0xffff, \
(ntohl(ipaddr->addr[3]) >> 16) & 0xffff, \
ntohl(ipaddr->addr[3]) & 0xffff));)
#define PRINT4ADDR(addr) printf("%u.%u.%u.%u", addr != NULL ? ip4_addr1_16(addr) : 0, addr != NULL ? ip4_addr2_16(addr) : 0, addr != NULL ? ip4_addr3_16(addr) : 0, addr != NULL ? ip4_addr4_16(addr) : 0);
#define PRINTLLADDR(addr)
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#define PRINT4ADDR(addr)
#define PRINTLLADDR(addr)
#endif
/*---------------------------------------------------------------------------*/
/*- Variables ---------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
static struct udp_pcb *udp_conn = NULL;
static uint16_t current_mid = 0;
QueueHandle_t *receivequeue_ptr;
coap_status_t erbium_status_code = NO_ERROR;
char *coap_error_message = "";
/*---------------------------------------------------------------------------*/
/*- Local helper functions --------------------------------------------------*/
/*---------------------------------------------------------------------------*/
static uint16_t coap_log_2(uint16_t value) {
uint16_t result = 0;
do {
value = value >> 1;
result++;
} while (value);
return result ? result - 1 : result;
}
/*---------------------------------------------------------------------------*/
static uint32_t coap_parse_int_option(uint8_t *bytes, size_t length) {
uint32_t var = 0;
int i = 0;
while (i < length) {
var <<= 8;
var |= bytes[i++];
}
return var;
}
/*---------------------------------------------------------------------------*/
static uint8_t coap_option_nibble(unsigned int value) {
if (value < 13) {
return value;
} else if (value <= 0xFF + 13) {
return 13;
} else {
return 14;
}
}
/*---------------------------------------------------------------------------*/
static size_t coap_set_option_header(unsigned int delta, size_t length,
uint8_t *buffer) {
size_t written = 0;
buffer[0] = coap_option_nibble(delta) << 4 | coap_option_nibble(length);
if (delta > 268) {
buffer[++written] = ((delta - 269) >> 8) & 0xff;
buffer[++written] = (delta - 269) & 0xff;
} else if (delta > 12) {
buffer[++written] = (delta - 13);
}
if (length > 268) {
buffer[++written] = ((length - 269) >> 8) & 0xff;
buffer[++written] = (length - 269) & 0xff;
} else if (length > 12) {
buffer[++written] = (length - 13);
}
PRINTF("WRITTEN %zu B opt header\n", 1 + written);
return ++written;
}
/*---------------------------------------------------------------------------*/
static size_t coap_serialize_int_option(unsigned int number,
unsigned int current_number, uint8_t *buffer, uint32_t value) {
size_t i = 0;
if (0xFF000000 & value) {
++i;
}
if (0xFFFF0000 & value) {
++i;
}
if (0xFFFFFF00 & value) {
++i;
}
if (0xFFFFFFFF & value) {
++i;
}
PRINTF("OPTION %u (delta %u, len %zu)\n", number, number - current_number,
i);
i = coap_set_option_header(number - current_number, i, buffer);
if (0xFF000000 & value) {
buffer[i++] = (uint8_t) (value >> 24);
}
if (0xFFFF0000 & value) {
buffer[i++] = (uint8_t) (value >> 16);
}
if (0xFFFFFF00 & value) {
buffer[i++] = (uint8_t) (value >> 8);
}
if (0xFFFFFFFF & value) {
buffer[i++] = (uint8_t) (value);
}
return i;
}
/*---------------------------------------------------------------------------*/
static size_t coap_serialize_array_option(unsigned int number,
unsigned int current_number, uint8_t *buffer, uint8_t *array,
size_t length, char split_char) {
size_t i = 0;
PRINTF("ARRAY type %u, len %zu, full [%.*s]\n", number, length,
(int )length, array);
if (split_char != '\0') {
int j;
uint8_t *part_start = array;
uint8_t *part_end = NULL;
size_t temp_length;
for (j = 0; j <= length + 1; ++j) {
PRINTF("STEP %u/%zu (%c)\n", j, length, array[j]);
if (array[j] == split_char || j == length) {
part_end = array + j;
temp_length = part_end - part_start;
i += coap_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 %zu, part [%.*s]\n",
number, number - current_number, i, (int )temp_length,
part_start);
++j; /* skip the splitter */
current_number = number;
part_start = array + j;
}
} /* for */
} else {
i += coap_set_option_header(number - current_number, length,
&buffer[i]);
memcpy(&buffer[i], array, length);
i += length;
PRINTF("OPTION type %u, delta %u, len %zu\n", number,
number - current_number, length);
}
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 already contains an option: concatenate */
(*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 is empty: set to option */
*dst = (char *) option;
*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;
}
/*---------------------------------------------------------------------------*/
/*- Internal API ------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
void receive_datagram(void *arg, struct udp_pcb *pcb, struct pbuf *p,
struct ip_addr *addr, u16_t port) {
PRINTF("receiving from: ");
PRINT4ADDR(addr);
PRINTF(":%u\n", port);
if (p == NULL)
return;
received_item_t datagram;
datagram.p = p;
datagram.addr = *addr;
datagram.port = port;
PRINTF("Before Queue send\n");
xQueueSend(*receivequeue_ptr, &datagram, 0);
PRINTF("Queue send\n");
}
void coap_init_connection(uint16_t port) {
/* new connection with remote host */
udp_conn = udp_new();
udp_bind(udp_conn, IP_ADDR_ANY, port);
/* initialize transaction ID */
current_mid = rand();
udp_recv(udp_conn, receive_datagram, NULL);
}
/*---------------------------------------------------------------------------*/
uint16_t coap_get_mid() {
return ++current_mid;
}
/*---------------------------------------------------------------------------*/
void coap_init_message(void *packet, coap_message_type_t type, uint8_t code,
uint16_t mid) {
coap_packet_t * const coap_pkt = (coap_packet_t *) packet;
/* Important thing */
memset(coap_pkt, 0, sizeof(coap_packet_t));
coap_pkt->type = type;
coap_pkt->code = code;
coap_pkt->mid = mid;
}
/*---------------------------------------------------------------------------*/
size_t coap_serialize_message(void *packet, uint8_t *buffer, ip_addr_t *addr,
uint16_t port) {
coap_packet_t * const coap_pkt = (coap_packet_t *) packet;
uint8_t *option;
unsigned int current_number = 0;
/* Initialize */
ip_addr_copy(coap_pkt->addr, *addr);
coap_pkt->port = port;
coap_pkt->buffer = buffer;
coap_pkt->version = 1;
PRINTF("-Serializing MID %u to %p, ", coap_pkt->mid, coap_pkt->buffer);
PRINT4ADDR(&coap_pkt->addr);
PRINT4ADDR(addr);
PRINTF("addr printed\n");
/* set header fields */
coap_pkt->buffer[0] = 0x00;
coap_pkt->buffer[0] |= COAP_HEADER_VERSION_MASK
& (coap_pkt->version) << COAP_HEADER_VERSION_POSITION;
coap_pkt->buffer[0] |= COAP_HEADER_TYPE_MASK
& (coap_pkt->type) << COAP_HEADER_TYPE_POSITION;
coap_pkt->buffer[0] |= COAP_HEADER_TOKEN_LEN_MASK
& (coap_pkt->token_len) << COAP_HEADER_TOKEN_LEN_POSITION;
coap_pkt->buffer[1] = coap_pkt->code;
coap_pkt->buffer[2] = (uint8_t) ((coap_pkt->mid) >> 8);
coap_pkt->buffer[3] = (uint8_t) (coap_pkt->mid);
/* empty packet, dont need to do more stuff */
if (!coap_pkt->code) {
PRINTF("-Done serializing empty message at %p-\n", coap_pkt->buffer);
return 4;
}
/* set Token */
PRINTF("Token (len %u)", coap_pkt->token_len);
option = coap_pkt->buffer + COAP_HEADER_LEN;
for (current_number = 0; current_number < coap_pkt->token_len;
++current_number) {
PRINTF(" %02X", coap_pkt->token[current_number]);
*option = coap_pkt->token[current_number];
++option;
}
PRINTF("-\n");
/* Serialize options */
current_number = 0;
PRINTF("-Serializing options at %p-\n", option);
/* The options must be serialized in the order of their number */
COAP_SERIALIZE_BYTE_OPTION(COAP_OPTION_IF_MATCH, if_match, "If-Match");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_URI_HOST, uri_host, '\0',
"Uri-Host");
COAP_SERIALIZE_BYTE_OPTION(COAP_OPTION_ETAG, etag, "ETag");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_IF_NONE_MATCH,
content_format - coap_pkt-> content_format /* hack to get a zero field */,
"If-None-Match");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_OBSERVE, observe, "Observe");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_URI_PORT, uri_port, "Uri-Port");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_LOCATION_PATH, location_path, '/',
"Location-Path");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_URI_PATH, uri_path, '/',
"Uri-Path");
PRINTF("Serialize content format: %d\n", coap_pkt->content_format);
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_CONTENT_FORMAT, content_format,
"Content-Format");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_MAX_AGE, max_age, "Max-Age");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_URI_QUERY, uri_query, '&',
"Uri-Query");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_ACCEPT, accept, "Accept");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_LOCATION_QUERY, location_query,
'&', "Location-Query");
COAP_SERIALIZE_BLOCK_OPTION(COAP_OPTION_BLOCK2, block2, "Block2");
COAP_SERIALIZE_BLOCK_OPTION(COAP_OPTION_BLOCK1, block1, "Block1");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_SIZE2, size2, "Size2");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_PROXY_URI, proxy_uri, '\0',
"Proxy-Uri");
COAP_SERIALIZE_STRING_OPTION(COAP_OPTION_PROXY_SCHEME, proxy_scheme, '\0',
"Proxy-Scheme");
COAP_SERIALIZE_INT_OPTION(COAP_OPTION_SIZE1, size1, "Size1");
PRINTF("-Done serializing at %p----\n", option);
/* Pack payload */
if ((option - coap_pkt->buffer) <= COAP_MAX_HEADER_SIZE) {
/* Payload marker */
if (coap_pkt->payload_len) {
*option = 0xFF;
++option;
}
memmove(option, coap_pkt->payload, coap_pkt->payload_len);
} else {
/* an error occurred: caller must check for !=0 */
coap_pkt->buffer = NULL;
coap_error_message = "Serialized header exceeds COAP_MAX_HEADER_SIZE";
return 0;
}
PRINTF("-Done %u B (header len %u, payload len %u)-\n",
(unsigned int )(coap_pkt->payload_len + option - buffer),
(unsigned int )(option - buffer),
(unsigned int )coap_pkt->payload_len);
PRINTF("Dump [0x%02X %02X %02X %02X %02X %02X %02X %02X]\n",
coap_pkt->buffer[0], coap_pkt->buffer[1], coap_pkt->buffer[2],
coap_pkt->buffer[3], coap_pkt->buffer[4], coap_pkt->buffer[5],
coap_pkt->buffer[6], coap_pkt->buffer[7]);
return (option - buffer) + coap_pkt->payload_len; /* packet length */
}
/*---------------------------------------------------------------------------*/
void coap_send_message(ip_addr_t *addr, uint16_t port, uint8_t *data,
uint16_t length) {
if (udp_conn == NULL)
PRINTF("[ERROR] null udp_conn\n");
struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, length, PBUF_RAM);
if (pbuf_take(p, data, length) == ERR_OK) {
udp_sendto(udp_conn, p, addr, port);
PRINTF("-sent UDP datagram (%u)-\n", length);
}
pbuf_free(p);
}
/*---------------------------------------------------------------------------*/
coap_status_t coap_parse_message(void *packet, uint8_t *data, uint16_t data_len) {
coap_packet_t * const coap_pkt = (coap_packet_t *) packet;
/* initialize packet */
memset(coap_pkt, 0, sizeof(coap_packet_t));
/* pointer to packet bytes */
coap_pkt->buffer = data;
/* parse header fields */
coap_pkt->version = (COAP_HEADER_VERSION_MASK & coap_pkt->buffer[0])
>> COAP_HEADER_VERSION_POSITION;
coap_pkt->type = (COAP_HEADER_TYPE_MASK & coap_pkt->buffer[0])
>> COAP_HEADER_TYPE_POSITION;
coap_pkt->token_len = (COAP_HEADER_TOKEN_LEN_MASK & coap_pkt->buffer[0])
>> COAP_HEADER_TOKEN_LEN_POSITION;
coap_pkt->code = coap_pkt->buffer[1];
coap_pkt->mid = coap_pkt->buffer[2] << 8 | coap_pkt->buffer[3];
if (coap_pkt->version != 1) {
coap_error_message = "CoAP version must be 1";
return BAD_REQUEST_4_00;
}
if (coap_pkt->token_len > COAP_TOKEN_LEN) {
coap_error_message = "Token Length must not be more than 8";
return BAD_REQUEST_4_00;
}
uint8_t *current_option = data + COAP_HEADER_LEN;
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;
if (option_delta == 13) {
option_delta += current_option[0];
++current_option;
} else if (option_delta == 14) {
option_delta += 255;
option_delta += current_option[0] << 8;
++current_option;
option_delta += current_option[0];
++current_option;
}
if (option_length == 13) {
option_length += current_option[0];
++current_option;
} else if (option_length == 14) {
option_length += 255;
option_length += current_option[0] << 8;
++current_option;
option_length += current_option[0];
++current_option;
}
option_number += option_delta;
PRINTF("OPTION %u (delta %u, len %zu): ", 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", (unsigned long )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",
(int )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",
(int )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", (int )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", (int )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", (int )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", (int )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",
(int )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", (unsigned long )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",
(unsigned long )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",
(unsigned long )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", (unsigned long )coap_pkt->size2);
break;
case COAP_OPTION_SIZE1:
coap_pkt->size1 = coap_parse_int_option(current_option,
option_length);
PRINTF("Size1 [%lu]\n", (unsigned long )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 = 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 = 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 */