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Code Issues Projects Releases Wiki Activity

Removed Erbium CoAP draft-06.

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This commit is contained in:
Matthias Kovatsch 2012-01-20 16:08:24 +01:00
parent b56198dc3c
commit 690e03a8a7
11 changed files with 0 additions and 2612 deletions
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1
apps/er-coap-06/Makefile.er-coap-06
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er-coap-06_src = er-coap-06-engine.c er-coap-06.c er-coap-06-transactions.c er-coap-06-observing.c er-coap-06-separate.c

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apps/er-coap-06/er-coap-06-engine.c
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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
* CoAP implementation of the REST Engine
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contiki.h"
#include "contiki-net.h"
#include "er-coap-06-engine.h"
#define DEBUG 0
#if DEBUG
#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])
#define PRINTBITS(buf,len) { \
int i,j=0; \
for (i=0; i<len; ++i) { \
for (j=7; j>=0; --j) { \
PRINTF("%c", (((char *)buf)[i] & 1<<j) ? '1' : '0'); \
} \
PRINTF(" "); \
} \
}
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#define PRINTLLADDR(addr)
#define PRINTBITS(buf,len)
#endif
PROCESS(coap_receiver, "CoAP Receiver");
/*-----------------------------------------------------------------------------------*/
/*- Variables -----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
static service_callback_t service_cbk = NULL;
/*-----------------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
static
int
handle_incoming_data(void)
{
coap_error_code = NO_ERROR;
PRINTF("handle_incoming_data(): received uip_datalen=%u \n",(uint16_t)uip_datalen());
/* Static declaration reduces stack peaks and program code size. */
static coap_packet_t message[1]; /* This way the packet can be treated as pointer as usual. */
static coap_packet_t response[1];
static coap_transaction_t *transaction = NULL;
if (uip_newdata()) {
PRINTF("receiving UDP datagram from: ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(":%u\n Length: %u\n Data: ", uip_ntohs(UIP_UDP_BUF->srcport), uip_datalen() );
PRINTBITS(uip_appdata, uip_datalen());
PRINTF("\n");
coap_error_code = coap_parse_message(message, uip_appdata, uip_datalen());
if (coap_error_code==NO_ERROR)
{
/*TODO duplicates suppression, if required */
PRINTF(" Parsed: v %u, t %u, oc %u, c %u, tid %u\n", message->version, message->type, message->option_count, message->code, message->tid);
PRINTF(" URL: %.*s\n", message->uri_path_len, message->uri_path);
PRINTF(" Payload: %.*s\n", message->payload_len, message->payload);
/* Handle requests. */
if (message->code >= COAP_GET && message->code <= COAP_DELETE)
{
/* Use transaction buffer for response to confirmable request. */
if ( (transaction = coap_new_transaction(message->tid, &UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport)) )
{
static uint32_t block_num = 0;
static uint16_t block_size = REST_MAX_CHUNK_SIZE;
static uint32_t block_offset = 0;
static int32_t new_offset = 0;
/* prepare response */
if (message->type==COAP_TYPE_CON)
{
/* Reliable CON requests are answered with an ACK. */
coap_init_message(response, COAP_TYPE_ACK, CONTENT_2_05, message->tid);
}
else
{
/* Unreliable NON requests are answered with a NON as well. */
coap_init_message(response, COAP_TYPE_NON, CONTENT_2_05, coap_get_tid());
}
/* resource handlers must take care of different handling (e.g., TOKEN_OPTION_REQUIRED_240) */
if (IS_OPTION(message, COAP_OPTION_TOKEN))
{
coap_set_header_token(response, message->token, message->token_len);
SET_OPTION(response, COAP_OPTION_TOKEN);
}
/* get offset for blockwise transfers */
if (coap_get_header_block2(message, &block_num, NULL, &block_size, &block_offset))
{
PRINTF("Blockwise: block request %lu (%u/%u) @ %lu bytes\n", block_num, block_size, REST_MAX_CHUNK_SIZE, block_offset);
block_size = MIN(block_size, REST_MAX_CHUNK_SIZE);
new_offset = block_offset;
}
else
{
new_offset = 0;
}
/* Invoke resource handler. */
if (service_cbk)
{
/* Call REST framework and check if found and allowed. */
if (service_cbk(message, response, transaction->packet+COAP_MAX_HEADER_SIZE, block_size, &new_offset))
{
/* Apply blockwise transfers. */
if ( IS_OPTION(message, COAP_OPTION_BLOCK2) )
{
/* unchanged new_offset indicates that resource is unaware of blockwise transfer */
if (new_offset==block_offset)
{
PRINTF("Blockwise: unaware resource with payload length %u/%u\n", response->payload_len, block_size);
if (block_offset >= response->payload_len)
{
PRINTF("handle_incoming_data(): block_offset >= response->payload_len\n");
response->code = BAD_OPTION_4_02;
coap_set_payload(response, (uint8_t*)"Block out of scope", 18);
}
else
{
coap_set_header_block2(response, block_num, response->payload_len - block_offset > block_size, block_size);
coap_set_payload(response, response->payload+block_offset, MIN(response->payload_len - block_offset, block_size));
} /* if (valid offset) */
}
else
{
/* resource provides chunk-wise data */
PRINTF("Blockwise: blockwise resource, new offset %ld\n", new_offset);
coap_set_header_block2(response, block_num, new_offset!=-1 || response->payload_len > block_size, block_size);
if (response->payload_len > block_size) coap_set_payload(response, response->payload, block_size);
} /* if (resource aware of blockwise) */
}
else if (new_offset!=0)
{
PRINTF("Blockwise: no block option for blockwise resource, using block size %u\n", REST_MAX_CHUNK_SIZE);
coap_set_header_block2(response, 0, new_offset!=-1, REST_MAX_CHUNK_SIZE);
coap_set_payload(response, response->payload, MIN(response->payload_len, REST_MAX_CHUNK_SIZE));
} /* if (blockwise request) */
}
}
else
{
coap_error_code = INTERNAL_SERVER_ERROR_5_00;
coap_error_message = "Service callback undefined";
} /* if (service callback) */
/* serialize Response. */
if ((transaction->packet_len = coap_serialize_message(response, transaction->packet))==0)
{
coap_error_code = PACKET_SERIALIZATION_ERROR;
}
} else {
coap_error_code = MEMORY_ALLOC_ERR;
coap_error_message = "Transaction buffer allocation failed";
} /* if (transaction buffer) */
}
else
{
/* Responses */
if (message->type==COAP_TYPE_ACK)
{
PRINTF("Received ACK\n");
}
else if (message->type==COAP_TYPE_RST)
{
PRINTF("Received RST\n");
/* Cancel possible subscriptions. */
if (IS_OPTION(message, COAP_OPTION_TOKEN))
{
PRINTF(" Token 0x%02X%02X\n", message->token[0], message->token[1]);
coap_remove_observer_by_token(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport, message->token, message->token_len);
}
}
if ( (transaction = coap_get_transaction_by_tid(message->tid)) )
{
/* Free transaction memory before callback, as it may create a new transaction. */
restful_response_handler callback = transaction->callback;
void *callback_data = transaction->callback_data;
coap_clear_transaction(transaction);
/* Check if someone registered for the response */
if (callback) {
callback(callback_data, message);
}
} /* if (ACKed transaction) */
transaction = NULL;
}
} /* if (parsed correctly) */
if (coap_error_code==NO_ERROR) {
if (transaction) coap_send_transaction(transaction);
}
else
{
PRINTF("ERROR %u: %s\n", coap_error_code, coap_error_message);
coap_clear_transaction(transaction);
/* Set to sendable error code. */
if (coap_error_code >= 192)
{
coap_error_code = INTERNAL_SERVER_ERROR_5_00;
}
/* Reuse input buffer for error message. */
coap_init_message(message, COAP_TYPE_ACK, coap_error_code, message->tid);
coap_set_payload(message, (uint8_t *) coap_error_message, strlen(coap_error_message));
coap_send_message(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport, uip_appdata, coap_serialize_message(message, uip_appdata));
}
} /* if (new data) */
return coap_error_code;
}
/*-----------------------------------------------------------------------------------*/
void
coap_receiver_init()
{
process_start(&coap_receiver, NULL);
}
/*-----------------------------------------------------------------------------------*/
void
coap_set_service_callback(service_callback_t callback)
{
service_cbk = callback;
}
/*-----------------------------------------------------------------------------------*/
rest_resource_flags_t
coap_get_rest_method(void *packet)
{
return (rest_resource_flags_t)(1 << (((coap_packet_t *)packet)->code - 1));
}
/*-----------------------------------------------------------------------------------*/
int
coap_set_rest_status(void *packet, unsigned int code)
{
if (code <= 0xFF)
{
((coap_packet_t *)packet)->code = (uint8_t) code;
return 1;
}
else
{
return 0;
}
}
/*-----------------------------------------------------------------------------------*/
/*- Server part ---------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
/* The discover resource is automatically included for CoAP. */
RESOURCE(well_known_core, METHOD_GET, ".well-known/core", "");
void
well_known_core_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
/* Response might be NULL for non-confirmable requests. */
if (response)
{
size_t strpos = 0;
size_t bufpos = 0;
resource_t* resource = NULL;
for (resource = (resource_t*)list_head(rest_get_resources()); resource; resource = resource->next)
{
strpos += snprintf((char *) buffer + bufpos, REST_MAX_CHUNK_SIZE - bufpos + 1,
"</%s>%s%s%s",
resource->url,
resource->attributes[0] ? ";" : "",
resource->attributes,
resource->next ? "," : "" );
PRINTF("discover: %s\n", resource->url);
if (strpos <= *offset)
{
/* Discard output before current block */
PRINTF(" if %d <= %ld B\n", strpos, *offset);
PRINTF(" %s\n", buffer);
bufpos = 0;
}
else /* (strpos > *offset) */
{
/* output partly in block */
size_t len = MIN(strpos - *offset, preferred_size);
PRINTF(" el %d/%d @ %ld B\n", len, preferred_size, *offset);
/* Block might start in the middle of the output; align with buffer start. */
if (bufpos == 0)
{
memmove(buffer, buffer+strlen((char *)buffer)-strpos+*offset, len);
}
bufpos = len;
PRINTF(" %s\n", buffer);
if (bufpos >= preferred_size)
{
break;
}
}
}
if (bufpos>0) {
coap_set_payload(response, buffer, bufpos );
coap_set_header_content_type(response, APPLICATION_LINK_FORMAT);
}
else
{
PRINTF("well_known_core_handler(): bufpos<=0\n");
coap_set_rest_status(response, BAD_OPTION_4_02);
coap_set_payload(response, (uint8_t*)"Block out of scope", 18);
}
if (resource==NULL) {
*offset = -1;
}
else
{
*offset += bufpos;
}
}
}
/*-----------------------------------------------------------------------------------*/
PROCESS_THREAD(coap_receiver, ev, data)
{
PROCESS_BEGIN();
PRINTF("Starting CoAP-06 receiver...\n");
rest_activate_resource(&resource_well_known_core);
coap_register_as_transaction_handler();
coap_init_connection(SERVER_LISTEN_PORT);
while(1) {
PROCESS_YIELD();
if(ev == tcpip_event) {
handle_incoming_data();
} else if (ev == PROCESS_EVENT_TIMER) {
/* retransmissions are handled here */
coap_check_transactions();
}
} /* while (1) */
PROCESS_END();
}
/*-----------------------------------------------------------------------------------*/
/*- Client part ---------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
void blocking_request_callback(void *callback_data, void *response) {
struct request_state_t *state = (struct request_state_t *) callback_data;
state->response = (coap_packet_t*) response;
process_poll(state->process);
}
/*-----------------------------------------------------------------------------------*/
PT_THREAD(coap_blocking_request(struct request_state_t *state, process_event_t ev,
uip_ipaddr_t *remote_ipaddr, uint16_t remote_port,
coap_packet_t *request,
blocking_response_handler request_callback)) {
PT_BEGIN(&state->pt);
static uint8_t more;
static uint32_t res_block;
static uint8_t block_error;
state->block_num = 0;
state->response = NULL;
state->process = PROCESS_CURRENT();
more = 0;
res_block = 0;
block_error = 0;
do {
request->tid = coap_get_tid();
if ((state->transaction = coap_new_transaction(request->tid, remote_ipaddr, remote_port)))
{
state->transaction->callback = blocking_request_callback;
state->transaction->callback_data = state;
if (state->block_num>0)
{
coap_set_header_block2(request, state->block_num, 0, REST_MAX_CHUNK_SIZE);
}
state->transaction->packet_len = coap_serialize_message(request, state->transaction->packet);
coap_send_transaction(state->transaction);
PRINTF("Requested #%lu (TID %u)\n", state->block_num, request->tid);
PT_YIELD_UNTIL(&state->pt, ev == PROCESS_EVENT_POLL);
if (!state->response)
{
PRINTF("Server not responding\n");
PT_EXIT(&state->pt);
}
coap_get_header_block2(state->response, &res_block, &more, NULL, NULL);
PRINTF("Received #%lu%s (%u bytes)\n", res_block, more ? "+" : "", state->response->payload_len);
if (res_block==state->block_num)
{
request_callback(state->response);
++(state->block_num);
}
else
{
PRINTF("WRONG BLOCK %lu/%lu\n", res_block, state->block_num);
++block_error;
}
}
else
{
PRINTF("Could not allocate transaction buffer");
PT_EXIT(&state->pt);
}
} while (more && block_error<COAP_MAX_ATTEMPTS);
PT_END(&state->pt);
}
/*-----------------------------------------------------------------------------------*/
/*- Engine Interface ----------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
const struct rest_implementation coap_rest_implementation = {
"CoAP-06",
coap_receiver_init,
coap_set_service_callback,
coap_get_header_uri_path,
coap_set_header_uri_path,
coap_get_rest_method,
coap_set_rest_status,
coap_get_header_content_type,
coap_set_header_content_type,
NULL,
coap_get_header_max_age,
coap_set_header_max_age,
coap_set_header_etag,
NULL,
NULL,
coap_get_header_uri_host,
coap_set_header_location_path,
coap_get_payload,
coap_set_payload,
coap_get_header_uri_query,
coap_get_query_variable,
coap_get_post_variable,
coap_notify_observers,
(restful_post_handler) coap_observe_handler,
NULL, /* default pre-handler (set separate handler after activation if needed) */
NULL, /* default post-handler for non-observable resources */
{
CONTENT_2_05,
CREATED_2_01,
CHANGED_2_04,
DELETED_2_02,
VALID_2_03,
BAD_REQUEST_4_00,
UNAUTHORIZED_4_01,
BAD_OPTION_4_02,
FORBIDDEN_4_03,
NOT_FOUND_4_04,
METHOD_NOT_ALLOWED_4_05,
REQUEST_ENTITY_TOO_LARGE_4_13,
UNSUPPORTED_MADIA_TYPE_4_15,
INTERNAL_SERVER_ERROR_5_00,
NOT_IMPLEMENTED_5_01,
BAD_GATEWAY_5_02,
SERVICE_UNAVAILABLE_5_03,
GATEWAY_TIMEOUT_5_04,
PROXYING_NOT_SUPPORTED_5_05
},
{
TEXT_PLAIN,
TEXT_XML,
TEXT_CSV,
TEXT_HTML,
IMAGE_GIF,
IMAGE_JPEG,
IMAGE_PNG,
IMAGE_TIFF,
AUDIO_RAW,
VIDEO_RAW,
APPLICATION_LINK_FORMAT,
APPLICATION_XML,
APPLICATION_OCTET_STREAM,
APPLICATION_RDF_XML,
APPLICATION_SOAP_XML,
APPLICATION_ATOM_XML,
APPLICATION_XMPP_XML,
APPLICATION_EXI,
APPLICATION_FASTINFOSET,
APPLICATION_SOAP_FASTINFOSET,
APPLICATION_JSON,
APPLICATION_X_OBIX_BINARY
}
};

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apps/er-coap-06/er-coap-06-engine.h
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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
* CoAP implementation of the REST Engine
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_SERVER_H_
#define COAP_SERVER_H_
#if !defined(REST)
#error "Define REST to \"coap_rest_implementation\""
#endif
#include "er-coap-06.h"
#include "er-coap-06-transactions.h"
#include "er-coap-06-observing.h"
#include "er-coap-06-separate.h"
#include "pt.h"
/* Declare server process */
PROCESS_NAME(coap_receiver);
#define SERVER_LISTEN_PORT UIP_HTONS(COAP_SERVER_PORT)
typedef coap_packet_t rest_request_t;
typedef coap_packet_t rest_response_t;
extern const struct rest_implementation coap_rest_implementation;
void coap_receiver_init(void);
/*-----------------------------------------------------------------------------------*/
/*- Client part ---------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------*/
struct request_state_t {
struct pt pt;
struct process *process;
coap_transaction_t *transaction;
coap_packet_t *response;
uint32_t block_num;
};
typedef void (*blocking_response_handler) (void* response);
PT_THREAD(coap_blocking_request(struct request_state_t *state, process_event_t ev,
uip_ipaddr_t *remote_ipaddr, uint16_t remote_port,
coap_packet_t *request,
blocking_response_handler request_callback));
#define COAP_BLOCKING_REQUEST(server_addr, server_port, request, chunk_handler) \
static struct request_state_t request_state; \
PT_SPAWN(process_pt, &request_state.pt, \
coap_blocking_request(&request_state, ev, \
server_addr, server_port, \
request, chunk_handler) \
);
/*-----------------------------------------------------------------------------------*/
#endif /* COAP_SERVER_H_ */

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apps/er-coap-06/er-coap-06-observing.c
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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
* CoAP module for observing resources
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include <stdio.h>
#include <string.h>
#include "er-coap-06-observing.h"
#define DEBUG 0
#if DEBUG
#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
MEMB(observers_memb, coap_observer_t, COAP_MAX_OBSERVERS);
LIST(observers_list);
/*-----------------------------------------------------------------------------------*/
coap_observer_t *
coap_add_observer(const char *url, uip_ipaddr_t *addr, uint16_t port, const uint8_t *token, size_t token_len)
{
coap_observer_t *o = memb_alloc(&observers_memb);
if (o)
{
o->url = url;
uip_ipaddr_copy(&o->addr, addr);
o->port = port;
o->token_len = token_len;
memcpy(o->token, token, token_len);
stimer_set(&o->refresh_timer, COAP_OBSERVING_REFRESH_INTERVAL);
PRINTF("Adding observer for /%s [0x%02X%02X]\n", o->url, o->token[0], o->token[1]);
list_add(observers_list, o);
}
return o;
}
/*-----------------------------------------------------------------------------------*/
void
coap_remove_observer(coap_observer_t *o)
{
PRINTF("Removing observer for /%s [0x%02X%02X]\n", o->url, o->token[0], o->token[1]);
memb_free(&observers_memb, o);
list_remove(observers_list, o);
}
int
coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port)
{
int removed = 0;
coap_observer_t* obs = NULL;
for (obs = (coap_observer_t*)list_head(observers_list); obs; obs = obs->next)
{
PRINTF("Remove check client ");
PRINT6ADDR(addr);
PRINTF(":%u\n", port);
if (uip_ipaddr_cmp(&obs->addr, addr) && obs->port==port)
{
coap_remove_observer(obs);
removed++;
}
}
return removed;
}
int
coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token, size_t token_len)
{
int removed = 0;
coap_observer_t* obs = NULL;
for (obs = (coap_observer_t*)list_head(observers_list); obs; obs = obs->next)
{
PRINTF("Remove check Token 0x%02X%02X\n", token[0], token[1]);
if (uip_ipaddr_cmp(&obs->addr, addr) && obs->port==port && memcmp(obs->token, token, token_len)==0)
{
coap_remove_observer(obs);
removed++;
}
}
return removed;
}
/*-----------------------------------------------------------------------------------*/
void
coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payload, size_t payload_len)
{
coap_observer_t* obs = NULL;
for (obs = (coap_observer_t*)list_head(observers_list); obs; obs = obs->next)
{
if (obs->url==url) /* using RESOURCE url pointer as handle */
{
coap_transaction_t *transaction = NULL;
/*TODO implement special transaction for CON, sharing the same buffer to allow for more observers */
if ( (transaction = coap_new_transaction(coap_get_tid(), &obs->addr, obs->port)) )
{
/* Use CON to check whether client is still there/interested after COAP_OBSERVING_REFRESH_INTERVAL. */
if (stimer_expired(&obs->refresh_timer))
{
PRINTF("Observing: Refresh client with CON\n");
type = COAP_TYPE_CON;
stimer_restart(&obs->refresh_timer);
}
/* prepare response */
coap_packet_t push[1]; /* This way the packet can be treated as pointer as usual. */
coap_init_message(push, (coap_message_type_t)type, CONTENT_2_05, transaction->tid );
coap_set_header_observe(push, observe);
coap_set_header_token(push, obs->token, obs->token_len);
coap_set_payload(push, payload, payload_len);
transaction->packet_len = coap_serialize_message(push, transaction->packet);
PRINTF("Observing: Notify from /%s for ", url);
PRINT6ADDR(&obs->addr);
PRINTF(":%u\n", obs->port);
PRINTF(" %.*s\n", payload_len, payload);
coap_send_transaction(transaction);
}
}
}
}
/*-----------------------------------------------------------------------------------*/
void
coap_observe_handler(resource_t *resource, void *request, void *response)
{
static char content[26];
if (response && ((coap_packet_t *)response)->code<128) /* response without error code */
{
if (IS_OPTION((coap_packet_t *)request, COAP_OPTION_OBSERVE))
{
if (!IS_OPTION((coap_packet_t *)request, COAP_OPTION_TOKEN))
{
/* Set default token. */
coap_set_header_token(request, (uint8_t *)"", 1);
}
if (coap_add_observer(resource->url, &UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport, ((coap_packet_t *)request)->token, ((coap_packet_t *)request)->token_len))
{
coap_set_header_observe(response, 0);
coap_set_payload(response, (uint8_t *)content, snprintf(content, sizeof(content), "Added as observer %u/%u", list_length(observers_list), COAP_MAX_OBSERVERS));
}
else
{
((coap_packet_t *)response)->code = SERVICE_UNAVAILABLE_5_03;
coap_set_payload(response, (uint8_t *)"Too many observers", 18);
} /* if (added observer) */
}
else /* if (observe) */
{
/* Remove client if it is currently observing. */
coap_remove_observer_by_client(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport);
} /* if (observe) */
}
}

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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
* CoAP module for observing resources
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_OBSERVING_H_
#define COAP_OBSERVING_H_
#include "er-coap-06.h"
#include "er-coap-06-transactions.h"
#ifndef COAP_MAX_OBSERVERS
#define COAP_MAX_OBSERVERS 4
#endif /* COAP_MAX_OBSERVERS */
/* Interval in seconds in which NON notifies are changed to CON notifies to check client. */
#define COAP_OBSERVING_REFRESH_INTERVAL 60
#if COAP_MAX_OPEN_TRANSACTIONS<COAP_MAX_OBSERVERS
#warning "COAP_MAX_OPEN_TRANSACTIONS smaller than COAP_MAX_OBSERVERS: cannot handle CON notifications"
#endif
typedef struct coap_observer {
struct coap_observer *next; /* for LIST */
const char *url;
uip_ipaddr_t addr;
uint16_t port;
uint8_t token_len;
uint8_t token[COAP_TOKEN_LEN];
struct stimer refresh_timer;
} coap_observer_t;
list_t coap_get_observers(void);
coap_observer_t *coap_add_observer(const char *url, uip_ipaddr_t *addr, uint16_t port, const uint8_t *token, size_t token_len);
void coap_remove_observer(coap_observer_t *o);
int coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port);
int coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token, size_t token_len);
void coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payload, size_t payload_len);
void coap_observe_handler(resource_t *resource, void *request, void *response);
#endif /* COAP_OBSERVING_H_ */

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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
* CoAP module for separate responses
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include <stdio.h>
#include <string.h>
#include "er-coap-06-separate.h"
#define DEBUG 0
#if DEBUG
#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
/*-----------------------------------------------------------------------------------*/
void coap_separate_handler(resource_t *resource, void *request, void *response)
{
if (resource->benchmark > COAP_SEPARATE_THRESHOLD)
{
PRINTF("Separate response for /%s \n", resource->url);
/* send separate ACK. */
coap_packet_t ack[1];
/* ACK with empty code (0) */
coap_init_message(ack, COAP_TYPE_ACK, 0, ((coap_packet_t *)request)->tid);
/* Should only overwrite Header which is already parsed to request. */
coap_send_message(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport, (uip_appdata + uip_ext_len), coap_serialize_message(ack, (uip_appdata + uip_ext_len)));
/* Change response to separate response. */
((coap_packet_t *)response)->type = COAP_TYPE_CON;
((coap_packet_t *)response)->tid = coap_get_tid();
}
}

50
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@ -1,50 +0,0 @@
/*
* 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
* CoAP module for separate responses
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_SEPARATE_H_
#define COAP_SEPARATE_H_
#include "er-coap-06.h"
#ifndef COAP_SEPARATE_THRESHOLD
#define COAP_SEPARATE_THRESHOLD 42
#endif
void coap_separate_handler(resource_t *resource, void *request, void *response);
#endif /* COAP_SEPARATE_H_ */

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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
* CoAP module for reliable transport
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include "contiki.h"
#include "contiki-net.h"
#include "er-coap-06-transactions.h"
/*
* Modulo mask (+1 and +0.5 for rounding) for a random number to get the tick number for the random
* retransmission time between COAP_RESPONSE_TIMEOUT and COAP_RESPONSE_TIMEOUT*COAP_RESPONSE_RANDOM_FACTOR.
*/
#define COAP_RESPONSE_TIMEOUT_TICKS (CLOCK_SECOND * COAP_RESPONSE_TIMEOUT)
#define COAP_RESPONSE_TIMEOUT_BACKOFF_MASK ((CLOCK_SECOND * COAP_RESPONSE_TIMEOUT * (COAP_RESPONSE_RANDOM_FACTOR - 1)) + 1.5)
#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
MEMB(transactions_memb, coap_transaction_t, COAP_MAX_OPEN_TRANSACTIONS);
LIST(transactions_list);
static struct process *transaction_handler_process = NULL;
void
coap_register_as_transaction_handler()
{
transaction_handler_process = PROCESS_CURRENT();
}
coap_transaction_t *
coap_new_transaction(uint16_t tid, uip_ipaddr_t *addr, uint16_t port)
{
coap_transaction_t *t = memb_alloc(&transactions_memb);
if (t)
{
t->tid = tid;
t->retrans_counter = 0;
/* save client address */
uip_ipaddr_copy(&t->addr, addr);
t->port = port;
}
return t;
}
void
coap_send_transaction(coap_transaction_t *t)
{
PRINTF("Sending transaction %u\n", t->tid);
coap_send_message(&t->addr, t->port, t->packet, t->packet_len);
if (COAP_TYPE_CON==((COAP_HEADER_TYPE_MASK & t->packet[0])>>COAP_HEADER_TYPE_POSITION))
{
if (t->retrans_counter<COAP_MAX_RETRANSMIT)
{
PRINTF("Keeping transaction %u\n", t->tid);
if (t->retrans_counter==0)
{
t->retrans_timer.timer.interval = COAP_RESPONSE_TIMEOUT_TICKS + (random_rand() % (clock_time_t) COAP_RESPONSE_TIMEOUT_BACKOFF_MASK);
PRINTF("Initial interval %f\n", (float)t->retrans_timer.timer.interval/CLOCK_SECOND);
}
else
{
t->retrans_timer.timer.interval <<= 1; /* double */
PRINTF("Doubled (%u) interval %f\n", t->retrans_counter, (float)t->retrans_timer.timer.interval/CLOCK_SECOND);
}
/*FIXME hack, maybe there is a better way, but avoid posting everything to the process */
struct process *process_actual = PROCESS_CURRENT();
process_current = transaction_handler_process;
etimer_restart(&t->retrans_timer); /* interval updated above */
process_current = process_actual;
list_add(transactions_list, t); /* List itself makes sure same element is not added twice. */
t = NULL;
}
else
{
/* timeout */
PRINTF("Timeout\n");
restful_response_handler callback = t->callback;
void *callback_data = t->callback_data;
/* handle observers */
coap_remove_observer_by_client(&t->addr, t->port);
coap_clear_transaction(t);
if (callback) {
callback(callback_data, NULL);
}
}
}
else
{
coap_clear_transaction(t);
}
}
void
coap_clear_transaction(coap_transaction_t *t)
{
if (t)
{
PRINTF("Freeing transaction %u: %p\n", t->tid, t);
etimer_stop(&t->retrans_timer);
list_remove(transactions_list, t);
memb_free(&transactions_memb, t);
}
}
coap_transaction_t *
coap_get_transaction_by_tid(uint16_t tid)
{
coap_transaction_t *t = NULL;
for (t = (coap_transaction_t*)list_head(transactions_list); t; t = t->next)
{
if (t->tid==tid)
{
PRINTF("Found transaction for TID %u: %p\n", t->tid, t);
return t;
}
}
return NULL;
}
void
coap_check_transactions()
{
coap_transaction_t *t = NULL;
for (t = (coap_transaction_t*)list_head(transactions_list); t; t = t->next)
{
if (etimer_expired(&t->retrans_timer))
{
++(t->retrans_counter);
PRINTF("Retransmitting %u (%u)\n", t->tid, t->retrans_counter);
coap_send_transaction(t);
}
}
}

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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
* CoAP module for reliable transport
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_TRANSACTIONS_H_
#define COAP_TRANSACTIONS_H_
#include "er-coap-06.h"
#include "er-coap-06-observing.h"
/*
* The number of concurrent messages that can be stored for retransmission in the transaction layer.
*/
#ifndef COAP_MAX_OPEN_TRANSACTIONS
#define COAP_MAX_OPEN_TRANSACTIONS 4
#endif /* COAP_MAX_OPEN_TRANSACTIONS */
/* container for transactions with message buffer and retransmission info */
typedef struct coap_transaction {
struct coap_transaction *next; /* for LIST */
uint16_t tid;
struct etimer retrans_timer;
uint8_t retrans_counter;
uip_ipaddr_t addr;
uint16_t port;
restful_response_handler callback;
void *callback_data;
uint16_t packet_len;
uint8_t packet[COAP_MAX_PACKET_SIZE+1]; /* +1 for the terminating '\0' to simply and savely use snprintf(buf, len+1, "", ...) in the resource handler. */
} coap_transaction_t;
void coap_register_as_transaction_handler();
coap_transaction_t *coap_new_transaction(uint16_t tid, uip_ipaddr_t *addr, uint16_t port);
void coap_send_transaction(coap_transaction_t *t);
void coap_clear_transaction(coap_transaction_t *t);
coap_transaction_t *coap_get_transaction_by_tid(uint16_t tid);
void coap_check_transactions();
#endif /* COAP_TRANSACTIONS_H_ */

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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 06)
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#include "contiki.h"
#include "contiki-net.h"
#include <string.h>
#include <stdio.h>
#include "er-coap-06.h"
#include "er-coap-06-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) (0xFF & value>>24);
if (0xFFFF0000 & value) buffer[++i] = (uint8_t) (0xFF & value>>16);
if (0xFFFFFF00 & value) buffer[++i] = (uint8_t) (0xFF & value>>8);
if ( value) buffer[++i] = (uint8_t) (0xFF & 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;
}
/*-----------------------------------------------------------------------------------*/
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_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;
}
/* 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_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;
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_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;
}
/*-----------------------------------------------------------------------------------*/
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;
}
/*-----------------------------------------------------------------------------------*/

300
apps/er-coap-06/er-coap-06.h
View File

@ -1,300 +0,0 @@
/*
* 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 06)
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_06_H_
#define COAP_06_H_
#include <stddef.h> /* for size_t */
#include "contiki-net.h"
#include "erbium.h"
#define COAP_DEFAULT_PORT 5683
#ifndef COAP_SERVER_PORT
#define COAP_SERVER_PORT COAP_DEFAULT_PORT
#endif
#define COAP_DEFAULT_MAX_AGE 60
#define COAP_RESPONSE_TIMEOUT 2
#define COAP_RESPONSE_RANDOM_FACTOR 1.5
#define COAP_MAX_RETRANSMIT 4
#define COAP_HEADER_LEN 4 /* | oc:0xF0 type:0x0C version:0x03 | code | tid:0x00FF | tid:0xFF00 | */
#define COAP_ETAG_LEN 8 /* The maximum number of bytes for the ETag */
#define COAP_TOKEN_LEN 8 /* The maximum number of bytes for the Token */
#define COAP_HEADER_VERSION_MASK 0xC0
#define COAP_HEADER_VERSION_POSITION 6
#define COAP_HEADER_TYPE_MASK 0x30
#define COAP_HEADER_TYPE_POSITION 4
#define COAP_HEADER_OPTION_COUNT_MASK 0x0F
#define COAP_HEADER_OPTION_COUNT_POSITION 0
#define COAP_HEADER_OPTION_DELTA_MASK 0xF0
#define COAP_HEADER_OPTION_SHORT_LENGTH_MASK 0x0F
/*
* Conservative size limit, as not all options have to be set at the same time.
*/
/* Hdr CoT Age Tag Obs Tok Blo strings */
#define COAP_MAX_HEADER_SIZE (4 + 3 + 5 + 1+COAP_ETAG_LEN + 3 + 1+COAP_TOKEN_LEN + 4 + 10) /* 50 */
#define COAP_MAX_PACKET_SIZE (COAP_MAX_HEADER_SIZE + REST_MAX_CHUNK_SIZE)
/* 0/14 48 for IPv6 (28 for IPv4) */
#if COAP_MAX_PACKET_SIZE > (UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN)
#error "UIP_CONF_BUFFER_SIZE too small for REST_MAX_CHUNK_SIZE"
#endif
/*
* Maximum number of failed request attempts before action
*/
#ifndef COAP_MAX_ATTEMPTS
#define COAP_MAX_ATTEMPTS 4
#endif /* COAP_MAX_ATTEMPTS */
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define SET_OPTION(packet, opt) ((packet)->options |= 1L<<opt)
#define IS_OPTION(packet, opt) ((packet)->options & 1L<<opt)
#ifndef MIN
#define MIN(a, b) ((a) < (b)? (a) : (b))
#endif /* MIN */
/* CoAP message types */
typedef enum {
COAP_TYPE_CON, /* confirmables */
COAP_TYPE_NON, /* non-confirmables */
COAP_TYPE_ACK, /* acknowledgements */
COAP_TYPE_RST /* reset */
} coap_message_type_t;
/* CoAP request method codes */
typedef enum {
COAP_GET = 1,
COAP_POST,
COAP_PUT,
COAP_DELETE
} coap_method_t;
/* CoAP response codes */
typedef enum {
NO_ERROR = 0,
CREATED_2_01 = 65, /* CREATED */
DELETED_2_02 = 66, /* DELETED */
VALID_2_03 = 67, /* NOT_MODIFIED */
CHANGED_2_04 = 68, /* CHANGED */
CONTENT_2_05 = 69, /* OK */
BAD_REQUEST_4_00 = 128, /* BAD_REQUEST */
UNAUTHORIZED_4_01 = 129, /* UNAUTHORIZED */
BAD_OPTION_4_02 = 130, /* BAD_OPTION */
FORBIDDEN_4_03 = 131, /* FORBIDDEN */
NOT_FOUND_4_04 = 132, /* NOT_FOUND */
METHOD_NOT_ALLOWED_4_05 = 133, /* METHOD_NOT_ALLOWED */
REQUEST_ENTITY_TOO_LARGE_4_13 = 141, /* REQUEST_ENTITY_TOO_LARGE */
UNSUPPORTED_MADIA_TYPE_4_15 = 143, /* UNSUPPORTED_MADIA_TYPE */
INTERNAL_SERVER_ERROR_5_00 = 160, /* INTERNAL_SERVER_ERROR */
NOT_IMPLEMENTED_5_01 = 161, /* NOT_IMPLEMENTED */
BAD_GATEWAY_5_02 = 162, /* BAD_GATEWAY */
SERVICE_UNAVAILABLE_5_03 = 163, /* SERVICE_UNAVAILABLE */
GATEWAY_TIMEOUT_5_04 = 164, /* GATEWAY_TIMEOUT */
PROXYING_NOT_SUPPORTED_5_05 = 165, /* PROXYING_NOT_SUPPORTED */
/* Memory errors */
IMPLEMENTATION_ERROR = 192,
MEMORY_ALLOC_ERR = 193,
MEMORY_BOUNDARY_EXCEEDED = 194,
/* CoAP errors */
UNIMPLEMENTED_CRITICAL_OPTION,
UNKNOWN_CRITICAL_OPTION,
PACKET_SERIALIZATION_ERROR
} coap_status_t;
/* CoAP header options */
typedef enum {
COAP_OPTION_CONTENT_TYPE = 1, /* 1-2 B */
COAP_OPTION_MAX_AGE = 2, /* 0-4 B */
COAP_OPTION_PROXY_URI = 3, /* 1-270 B */
COAP_OPTION_ETAG = 4, /* 1-8 B */
COAP_OPTION_URI_HOST = 5, /* 1-270 B */
COAP_OPTION_LOCATION_PATH = 6, /* 1-270 B */
COAP_OPTION_URI_PORT = 7, /* 0-2 B */
COAP_OPTION_LOCATION_QUERY = 8, /* 1-270 B */
COAP_OPTION_URI_PATH = 9, /* 1-270 B */
COAP_OPTION_OBSERVE = 10, /* 0-2 B */
COAP_OPTION_TOKEN = 11, /* 1-8 B */
COAP_OPTION_FENCE_POST = 14, /* 0 B */
COAP_OPTION_URI_QUERY = 15, /* 1-270 B */
COAP_OPTION_BLOCK2 = 17, /* 1-3 B */
COAP_OPTION_BLOCK1 = 19, /* 1-3 B */
} coap_option_t;
/* CoAP content-types */
typedef enum {
TEXT_PLAIN = 0,
TEXT_XML = 1, /* Intented types are not in the initial registry. */
TEXT_CSV = 2,
TEXT_HTML = 3,
IMAGE_GIF = 21,
IMAGE_JPEG = 22,
IMAGE_PNG = 23,
IMAGE_TIFF = 24,
AUDIO_RAW = 25,
VIDEO_RAW = 26,
APPLICATION_LINK_FORMAT = 40, /* Actually not in registry!? */
APPLICATION_XML = 41,
APPLICATION_OCTET_STREAM = 42,
APPLICATION_RDF_XML = 43,
APPLICATION_SOAP_XML = 44,
APPLICATION_ATOM_XML = 45,
APPLICATION_XMPP_XML = 46,
APPLICATION_EXI = 47,
APPLICATION_FASTINFOSET = 48,
APPLICATION_SOAP_FASTINFOSET = 49,
APPLICATION_JSON = 50,
APPLICATION_X_OBIX_BINARY = 51
} coap_content_type_t;
typedef struct {
uint8_t *buffer; /* pointer to CoAP header / incoming packet buffer / memory to serialize packet */
uint8_t version;
coap_message_type_t type;
uint8_t option_count;
uint8_t code;
uint16_t tid;
uint32_t options; /* Bitmap to check if option is set */
coap_content_type_t content_type; /* Parse options once and store; allows setting options in random order */
uint32_t max_age;
size_t proxy_uri_len;
char *proxy_uri;
uint8_t etag_len;
uint8_t etag[COAP_ETAG_LEN];
size_t uri_host_len;
char *uri_host;
size_t location_path_len;
char *location_path;
uint16_t uri_port;
size_t location_query_len;
char *location_query;
size_t uri_path_len;
char *uri_path;
uint16_t observe;
uint8_t token_len;
uint8_t token[COAP_TOKEN_LEN];
uint32_t block2_num;
uint8_t block2_more;
uint16_t block2_size;
uint32_t block2_offset;
uint32_t block1_num;
uint8_t block1_more;
uint16_t block1_size;
uint32_t block1_offset;
size_t uri_query_len;
char *uri_query;
uint16_t payload_len;
uint8_t *payload;
} coap_packet_t;
/* To store error code and human-readable payload */
extern coap_status_t coap_error_code;
extern char *coap_error_message;
void coap_init_connection(uint16_t port);
uint16_t coap_get_tid(void);
void coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t tid);
size_t coap_serialize_message(void *packet, uint8_t *buffer);
void coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length);
coap_status_t coap_parse_message(void *request, uint8_t *data, uint16_t data_len);
int coap_get_query_variable(void *packet, const char *name, const char **output);
int coap_get_post_variable(void *packet, const char *name, const char **output);
unsigned int coap_get_header_content_type(void *packet);
int coap_set_header_content_type(void *packet, unsigned int content_type);
int coap_get_header_max_age(void *packet, uint32_t *age);
int coap_set_header_max_age(void *packet, uint32_t age);
int coap_get_header_etag(void *packet, const uint8_t **etag);
int coap_set_header_etag(void *packet, uint8_t *etag, size_t etag_len);
int coap_get_header_token(void *packet, const uint8_t **token);
int coap_set_header_token(void *packet, uint8_t *token, size_t token_len);
int coap_get_header_proxy_uri(void *packet, const char **uri); /* In-place string might not be 0-terminated. */
int coap_set_header_proxy_uri(void *packet, char *uri);
int coap_get_header_uri_host(void *packet, const char **host); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_host(void *packet, char *host);
int coap_get_header_uri_path(void *packet, const char **path); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_path(void *packet, char *path);
int coap_get_header_uri_query(void *packet, const char **query); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_query(void *packet, char *query);
int coap_get_header_location_path(void *packet, const char **path); /* In-place string might not be 0-terminated. */
int coap_set_header_location_path(void *packet, char *path); /* Also splits optional query into Location-Query option. */
int coap_get_header_location_query(void *packet, const char **query); /* In-place string might not be 0-terminated. */
int coap_set_header_location_query(void *packet, char *query);
int coap_get_header_observe(void *packet, uint32_t *observe);
int coap_set_header_observe(void *packet, uint32_t observe);
int coap_get_header_block2(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset);
int coap_set_header_block2(void *packet, uint32_t num, uint8_t more, uint16_t size);
int coap_get_header_block1(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset);
int coap_set_header_block1(void *packet, uint32_t num, uint8_t more, uint16_t size);
int coap_get_payload(void *packet, const uint8_t **payload);
int coap_set_payload(void *packet, uint8_t *payload, size_t length);
#endif /* COAP_06_H_ */