Skip to content
Permalink
master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
#ifndef COAP_H
#define COAP_H 1
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#define MAXOPT 16
//http://tools.ietf.org/html/rfc7252#section-3
typedef struct
{
uint8_t ver; /* CoAP version number */
uint8_t t; /* CoAP Message Type */
uint8_t tkl; /* Token length: indicates length of the Token field */
uint8_t code; /* CoAP status code. Can be request (0.xx), success reponse (2.xx),
* client error response (4.xx), or rever error response (5.xx)
* For possible values, see http://tools.ietf.org/html/rfc7252#section-12.1 */
uint8_t id[2];
} coap_header_t;
typedef struct
{
const uint8_t *p;
size_t len;
} coap_buffer_t;
typedef struct
{
uint8_t *p;
size_t len;
} coap_rw_buffer_t;
typedef struct
{
uint8_t num; /* Option number. See http://tools.ietf.org/html/rfc7252#section-5.10 */
coap_buffer_t buf; /* Option value */
} coap_option_t;
typedef struct
{
coap_header_t hdr; /* Header of the packet */
coap_buffer_t tok; /* Token value, size as specified by hdr.tkl */
uint8_t numopts; /* Number of options */
coap_option_t opts[MAXOPT]; /* Options of the packet. For possible entries see
* http://tools.ietf.org/html/rfc7252#section-5.10 */
coap_buffer_t payload; /* Payload carried by the packet */
} coap_packet_t;
/////////////////////////////////////////
//http://tools.ietf.org/html/rfc7252#section-12.2
typedef enum
{
COAP_OPTION_IF_MATCH = 1,
COAP_OPTION_URI_HOST = 3,
COAP_OPTION_ETAG = 4,
COAP_OPTION_IF_NONE_MATCH = 5,
COAP_OPTION_OBSERVE = 6,
COAP_OPTION_URI_PORT = 7,
COAP_OPTION_LOCATION_PATH = 8,
COAP_OPTION_URI_PATH = 11,
COAP_OPTION_CONTENT_FORMAT = 12,
COAP_OPTION_MAX_AGE = 14,
COAP_OPTION_URI_QUERY = 15,
COAP_OPTION_ACCEPT = 17,
COAP_OPTION_LOCATION_QUERY = 20,
COAP_OPTION_PROXY_URI = 35,
COAP_OPTION_PROXY_SCHEME = 39
} coap_option_num_t;
//http://tools.ietf.org/html/rfc7252#section-12.1.1
typedef enum
{
COAP_METHOD_GET = 1,
COAP_METHOD_POST = 2,
COAP_METHOD_PUT = 3,
COAP_METHOD_DELETE = 4
} coap_method_t;
//http://tools.ietf.org/html/rfc7252#section-12.1.1
typedef enum
{
COAP_TYPE_CON = 0,
COAP_TYPE_NONCON = 1,
COAP_TYPE_ACK = 2,
COAP_TYPE_RESET = 3
} coap_msgtype_t;
//http://tools.ietf.org/html/rfc7252#section-5.2
//http://tools.ietf.org/html/rfc7252#section-12.1.2
#define MAKE_RSPCODE(clas, det) ((clas << 5) | (det))
typedef enum
{
COAP_RSPCODE_CONTENT = MAKE_RSPCODE(2, 5),
COAP_RSPCODE_NOT_FOUND = MAKE_RSPCODE(4, 4),
COAP_RSPCODE_BAD_REQUEST = MAKE_RSPCODE(4, 0),
COAP_RSPCODE_CHANGED = MAKE_RSPCODE(2, 4)
} coap_responsecode_t;
//http://tools.ietf.org/html/rfc7252#section-12.3
typedef enum
{
COAP_CONTENTTYPE_NONE = -1, // bodge to allow us not to send option block
COAP_CONTENTTYPE_TEXT_PLAIN = 0,
COAP_CONTENTTYPE_APPLICATION_LINKFORMAT = 40,
COAP_CONTENTTYPE_APPLICATION_XML = 41,
COAP_CONTENTTYPE_APPLICATION_OCTECT_STREAM = 42,
COAP_CONTENTTYPE_APPLICATION_EXI = 47,
COAP_CONTENTTYPE_APPLICATION_JSON = 50,
} coap_content_type_t;
///////////////////////
typedef enum
{
COAP_ERR_NONE = 0,
COAP_ERR_HEADER_TOO_SHORT = 1,
COAP_ERR_VERSION_NOT_1 = 2,
COAP_ERR_TOKEN_TOO_SHORT = 3,
COAP_ERR_OPTION_TOO_SHORT_FOR_HEADER = 4,
COAP_ERR_OPTION_TOO_SHORT = 5,
COAP_ERR_OPTION_OVERRUNS_PACKET = 6,
COAP_ERR_OPTION_TOO_BIG = 7,
COAP_ERR_OPTION_LEN_INVALID = 8,
COAP_ERR_BUFFER_TOO_SMALL = 9,
COAP_ERR_UNSUPPORTED = 10,
COAP_ERR_OPTION_DELTA_INVALID = 11,
} coap_error_t;
///////////////////////
typedef int (*coap_endpoint_func)(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo);
#define MAX_SEGMENTS 2 // 2 = /foo/bar, 3 = /foo/bar/baz
typedef struct
{
int count;
const char *elems[MAX_SEGMENTS];
} coap_endpoint_path_t;
typedef struct
{
coap_method_t method; /* (i.e. POST, PUT or GET) */
coap_endpoint_func handler; /* callback function which handles this
* type of endpoint (and calls
* coap_make_response() at some point) */
const coap_endpoint_path_t *path; /* path towards a resource (i.e. foo/bar/) */
const char *core_attr; /* the 'ct' attribute, as defined in RFC7252, section 7.2.1.:
* "The Content-Format code "ct" attribute
* provides a hint about the
* Content-Formats this resource returns."
* (Section 12.3. lists possible ct values.) */
} coap_endpoint_t;
///////////////////////
void coap_dumpPacket(coap_packet_t *pkt);
int coap_parse(coap_packet_t *pkt, const uint8_t *buf, size_t buflen);
int coap_buffer_to_string(char *strbuf, size_t strbuflen, const coap_buffer_t *buf);
const coap_option_t *coap_findOptions(const coap_packet_t *pkt, uint8_t num, uint8_t *count);
int coap_build(uint8_t *buf, size_t *buflen, const coap_packet_t *pkt);
void coap_dump(const uint8_t *buf, size_t buflen, bool bare);
int coap_make_response(coap_rw_buffer_t *scratch, coap_packet_t *pkt, const uint8_t *content, size_t content_len, uint8_t msgid_hi, uint8_t msgid_lo, const coap_buffer_t* tok, coap_responsecode_t rspcode, coap_content_type_t content_type);
int coap_handle_req(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt);
void coap_option_nibble(uint32_t value, uint8_t *nibble);
void coap_setup(void);
void endpoint_setup(void);
#ifdef __cplusplus
}
#endif
#endif