Johny Mattsson 526d21dab4 Major cleanup - c_whatever is finally history. (#2838)
The PR removed the bulk of non-newlib headers from the NodeMCU source base.  
app/libc has now been cut down to the bare minimum overrides to shadow the 
corresponding functions in the SDK's libc. The old c_xyz.h headerfiles have been 
nuked in favour of the standard <xyz.h> headers, with a few exceptions over in 
sdk-overrides. Again, shipping a libc.a without headers is a terrible thing to do. We're 
still living on a prayer that libc was configured the same was as a default-configured
xtensa gcc toolchain assumes it is. That part I cannot do anything about, unfortunately, 
but it's no worse than it has been before.

This enables our source files to compile successfully using the standard header files, 
and use the typical malloc()/calloc()/realloc()/free(), the strwhatever()s and 
memwhatever()s. These end up, through macro and linker magic, mapped to the 
appropriate SDK or ROM functions.
2019-07-22 00:58:21 +03:00

205 lines
6.7 KiB
C

#ifndef COAP_H
#define COAP_H 1
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stddef.h>
#include "lualib.h"
#include "lauxlib.h"
#define MAXOPT 16
#define MAX_MESSAGE_SIZE 1152
#define MAX_PAYLOAD_SIZE 1024
#define MAX_REQUEST_SIZE 576
#define MAX_REQ_SCRATCH_SIZE 60
#define COAP_RESPONSE_CLASS(C) (((C) >> 5) & 0xFF)
//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_rw_buffer_t content; // content->p = malloc(...) , and free it when done.
} 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_OCTET_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 struct coap_endpoint_t coap_endpoint_t;
typedef int (*coap_endpoint_func)(const coap_endpoint_t *ep, 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 3 // 2 = /foo/bar, 3 = /foo/bar/baz
#define MAX_SEGMENTS_SIZE 16
typedef struct
{
int count;
const char *elems[MAX_SEGMENTS];
} coap_endpoint_path_t;
typedef struct coap_luser_entry coap_luser_entry;
struct coap_luser_entry{
// int ref;
// char name[MAX_SEGMENTS_SIZE+1]; // +1 for string '\0'
const char *name;
coap_luser_entry *next;
int content_type;
};
struct coap_endpoint_t{
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_luser_entry *user_entry;
};
///////////////////////
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);
int coap_buildOptionHeader(uint32_t optDelta, size_t length, uint8_t *buf, size_t buflen);
int check_token(coap_packet_t *pkt);
#include "uri.h"
int coap_make_request(coap_rw_buffer_t *scratch, coap_packet_t *pkt, coap_msgtype_t t, coap_method_t m, coap_uri_t *uri, const uint8_t *payload, size_t payload_len);
#ifdef __cplusplus
}
#endif
#endif