mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-29 13:29:09 +00:00
323 lines
12 KiB
C
323 lines
12 KiB
C
/*
|
|
* Copyright (c) 2011, Institute for Pervasive Computing, ETH Zurich
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* An implementation of the Constrained Application Protocol (draft 07)
|
|
* \author
|
|
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
|
|
*/
|
|
|
|
#ifndef COAP_07_H_
|
|
#define COAP_07_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 | mid:0x00FF | mid: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_MAX_ACCEPT_NUM 2 /* The maximum number of accept preferences to parse/store */
|
|
|
|
#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_LLH_LEN + UIP_IPH_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 */
|
|
NOT_ACCEPTABLE_4_06 = 134, /* NOT_ACCEPTABLE */
|
|
PRECONDITION_FAILED_4_12 = 140, /* BAD_REQUEST */
|
|
REQUEST_ENTITY_TOO_LARGE_4_13 = 141, /* REQUEST_ENTITY_TOO_LARGE */
|
|
UNSUPPORTED_MEDIA_TYPE_4_15 = 143, /* UNSUPPORTED_MEDIA_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 */
|
|
|
|
/* Erbium errors */
|
|
MEMORY_ALLOCATION_ERROR = 192,
|
|
PACKET_SERIALIZATION_ERROR,
|
|
|
|
/* Erbium hooks */
|
|
MANUAL_RESPONSE
|
|
|
|
} coap_status_t;
|
|
|
|
/* CoAP header options */
|
|
typedef enum {
|
|
COAP_OPTION_CONTENT_TYPE = 1, /* 0-2 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_ACCEPT = 12, /* 0-2 B */
|
|
COAP_OPTION_IF_MATCH = 13, /* 0-8 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_IF_NONE_MATCH = 21 /* 0 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 mid;
|
|
|
|
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;
|
|
const char *proxy_uri;
|
|
uint8_t etag_len;
|
|
uint8_t etag[COAP_ETAG_LEN];
|
|
size_t uri_host_len;
|
|
const char *uri_host;
|
|
size_t location_path_len;
|
|
const char *location_path;
|
|
uint16_t uri_port;
|
|
size_t location_query_len;
|
|
const char *location_query;
|
|
size_t uri_path_len;
|
|
const char *uri_path;
|
|
uint16_t observe;
|
|
uint8_t token_len;
|
|
uint8_t token[COAP_TOKEN_LEN];
|
|
uint8_t accept_num;
|
|
uint16_t accept[COAP_MAX_ACCEPT_NUM];
|
|
uint8_t if_match_len;
|
|
uint8_t if_match[COAP_ETAG_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;
|
|
const char *uri_query;
|
|
uint8_t if_none_match;
|
|
|
|
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_mid(void);
|
|
|
|
void coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t mid);
|
|
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);
|
|
|
|
/*-----------------------------------------------------------------------------------*/
|
|
|
|
int coap_set_status_code(void *packet, unsigned int code);
|
|
|
|
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_accept(void *packet, const uint16_t **accept);
|
|
int coap_set_header_accept(void *packet, uint16_t accept);
|
|
|
|
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, const uint8_t *etag, size_t etag_len);
|
|
|
|
int coap_get_header_if_match(void *packet, const uint8_t **etag);
|
|
int coap_set_header_if_match(void *packet, const uint8_t *etag, size_t etag_len);
|
|
|
|
int coap_get_header_if_none_match(void *packet);
|
|
int coap_set_header_if_none_match(void *packet);
|
|
|
|
int coap_get_header_token(void *packet, const uint8_t **token);
|
|
int coap_set_header_token(void *packet, const 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, const 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, const 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, const 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, const 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, const 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, const 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, const void *payload, size_t length);
|
|
|
|
#endif /* COAP_07_H_ */
|