URI handling functions. More...

#include "coap3/coap_internal.h"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

Include dependency graph for uri.c:

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Data Structures
struct	cnt_str

Macros
#define	ISEQUAL_CI(a, b) ((a) == (b) \|\| (islower(b) && ((a) == ((b) - 0x20))))

#define	hexchar_to_dec(c)
	Calculates decimal value from hexadecimal ASCII character given in `c`. More...

#define	min(a, b) ((a) < (b) ? (a) : (b))

#define	URI_DATA(uriobj) ((unsigned char *)(uriobj) + sizeof(coap_uri_t))

Typedefs
typedef enum coap_uri_check_t	coap_uri_check_t

typedef void(*	segment_handler_t) (const uint8_t , size_t, void )

Enumerations
enum	coap_uri_check_t { COAP_URI_CHECK_URI , COAP_URI_CHECK_PROXY }

Functions
COAP_STATIC_INLINE const uint8_t *	strnchr (const uint8_t *s, size_t len, unsigned char c)
	A length-safe version of strchr(). More...

static int	coap_split_uri_sub (const uint8_t str_var, size_t len, coap_uri_t uri, coap_uri_check_t check_proxy)

int	coap_split_uri (const uint8_t str_var, size_t len, coap_uri_t uri)
	Parses a given string into URI components. More...

int	coap_split_proxy_uri (const uint8_t str_var, size_t len, coap_uri_t uri)
	Parses a given string into URI components. More...

static void	decode_segment (const uint8_t seg, size_t length, unsigned char buf)
	Decodes percent-encoded characters while copying the string `seg` of size `length` to `buf`. More...

static int	check_segment (const uint8_t s, size_t length, size_t segment_size)
	Runs through the given path (or query) segment and checks if percent-encodings are correct. More...

static int	make_decoded_option (const uint8_t s, size_t length, unsigned char buf, size_t buflen, size_t *optionsize)
	Writes a coap option from given string `s` to `buf`. More...

COAP_STATIC_INLINE int	dots (const uint8_t *s, size_t len)
	Checks if path segment `s` consists of one or two dots. More...

static size_t	coap_split_path_impl (const uint8_t s, size_t length, segment_handler_t h, void data)
	Splits the given string into segments. More...

static void	write_option (const uint8_t s, size_t len, void data)

int	coap_split_path (const uint8_t s, size_t length, unsigned char buf, size_t *buflen)
	Splits the given URI path into segments. More...

int	coap_split_query (const uint8_t s, size_t length, unsigned char buf, size_t *buflen)
	Splits the given URI query into segments. More...

coap_uri_t *	coap_new_uri (const uint8_t *uri, unsigned int length)
	Creates a new coap_uri_t object from the specified URI. More...

coap_uri_t *	coap_clone_uri (const coap_uri_t *uri)
	Clones the specified coap_uri_t object. More...

COAP_STATIC_INLINE int	is_unescaped_in_path (const uint8_t c)

COAP_STATIC_INLINE int	is_unescaped_in_query (const uint8_t c)

coap_string_t *	coap_get_query (const coap_pdu_t *request)
	Extract query string from request PDU according to escape rules in 6.5.8. More...

coap_string_t *	coap_get_uri_path (const coap_pdu_t *request)
	Extract uri_path string from request PDU. More...

Detailed Description

URI handling functions.

Definition in file uri.c.

Macro Definition Documentation

◆ hexchar_to_dec

#define hexchar_to_dec ( c )

Calculates decimal value from hexadecimal ASCII character given in c.

The caller must ensure that c actually represents a valid heaxdecimal character, e.g. with isxdigit(3).

Definition at line 257 of file uri.c.

◆ ISEQUAL_CI

#define ISEQUAL_CI	(	a,
		b
	)	((a) == (b) \|\| (islower(b) && ((a) == ((b) - 0x20))))

Definition at line 46 of file uri.c.

◆ min

#define min	(	a,
		b
	)	((a) < (b) ? (a) : (b))

Definition at line 375 of file uri.c.

◆ URI_DATA

#define URI_DATA ( uriobj ) ((unsigned char *)(uriobj) + sizeof(coap_uri_t))

Definition at line 484 of file uri.c.

Typedef Documentation

◆ coap_uri_check_t

typedef enum coap_uri_check_t coap_uri_check_t

◆ segment_handler_t

typedef void(* segment_handler_t) (const uint8_t *, size_t, void *)

Definition at line 378 of file uri.c.

Enumeration Type Documentation

◆ coap_uri_check_t

enum coap_uri_check_t

Enumerator
COAP_URI_CHECK_URI
COAP_URI_CHECK_PROXY

Definition at line 49 of file uri.c.

Function Documentation

◆ check_segment()

static int check_segment	(	const uint8_t *	s,
		size_t	length,
		size_t *	segment_size
	)

static

Runs through the given path (or query) segment and checks if percent-encodings are correct.

This function returns 0 on success and -1 on error.

Definition at line 294 of file uri.c.

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◆ coap_clone_uri()

coap_uri_t * coap_clone_uri ( const coap_uri_t * uri )

Clones the specified coap_uri_t object.

Thie function allocates sufficient memory to hold the coap_uri_t structure and its contents. The object must be released with coap_free().

Definition at line 506 of file uri.c.

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◆ coap_new_uri()

coap_uri_t * coap_new_uri	(	const uint8_t *	uri,
		unsigned int	length
	)

Creates a new coap_uri_t object from the specified URI.

Returns the new object or NULL on error. The memory allocated by the new coap_uri_t must be released using coap_free().

Parameters

uri	The URI path to copy.
length	The length of uri.

Returns: New URI object or NULL on error.

Definition at line 487 of file uri.c.

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◆ coap_split_path_impl()

static size_t coap_split_path_impl	(	const uint8_t *	s,
		size_t	length,
		segment_handler_t	h,
		void *	data
	)

static

Splits the given string into segments.

You should call one of the macros coap_split_path() or coap_split_query() instead.

Parameters

s	The URI string to be tokenized.
length	The length of `s`.
h	A handler that is called with every token.
data	Opaque data that is passed to `h` when called.

Returns: The number of characters that have been parsed from s.

Definition at line 400 of file uri.c.

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◆ coap_split_uri_sub()

static int coap_split_uri_sub	(	const uint8_t *	str_var,
		size_t	len,
		coap_uri_t *	uri,
		coap_uri_check_t	check_proxy
	)

static

Definition at line 55 of file uri.c.

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◆ decode_segment()

static void decode_segment	(	const uint8_t *	seg,
		size_t	length,
		unsigned char *	buf
	)

static

Decodes percent-encoded characters while copying the string seg of size length to buf.

The caller of this function must ensure that the percent-encodings are correct (i.e. the character '' is always followed by two hex digits. and that buf provides sufficient space to hold the result. This function is supposed to be called by make_decoded_option() only.

Parameters

seg	The segment to decode and copy.
length	Length of `seg`.
buf	The result buffer.

Definition at line 272 of file uri.c.

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◆ dots()

COAP_STATIC_INLINE int dots	(	const uint8_t *	s,
		size_t	len
	)

Checks if path segment s consists of one or two dots.

Definition at line 384 of file uri.c.

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◆ is_unescaped_in_path()

COAP_STATIC_INLINE int is_unescaped_in_path ( const uint8_t c )

Definition at line 548 of file uri.c.

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◆ is_unescaped_in_query()

COAP_STATIC_INLINE int is_unescaped_in_query ( const uint8_t c )

Definition at line 557 of file uri.c.

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◆ make_decoded_option()

static int make_decoded_option	(	const uint8_t *	s,
		size_t	length,
		unsigned char *	buf,
		size_t	buflen,
		size_t *	optionsize
	)

static

Writes a coap option from given string s to buf.

s should point to a (percent-encoded) path or query segment of a coap_uri_t object. The created option will have type 0, and the length parameter will be set according to the size of the decoded string. On success, this function returns 0 and sets optionsize to the option's size. On error the function returns a value less than zero. This function must be called from coap_split_path_impl() only.

Parameters

s	The string to decode.
length	The size of the percent-encoded string `s`.
buf	The buffer to store the new coap option.
buflen	The maximum size of `buf`.
optionsize	The option's size.

Returns: 0 on success and -1 on error.

Definition at line 335 of file uri.c.

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◆ strnchr()

COAP_STATIC_INLINE const uint8_t * strnchr	(	const uint8_t *	s,
		size_t	len,
		unsigned char	c
	)

A length-safe version of strchr().

This function returns a pointer to the first occurrence of c in s, or NULL if not found.

Parameters

s	The string to search for `c`.
len	The length of `s`.
c	The character to search.

Returns: A pointer to the first occurence of c, or NULL if not found.

Definition at line 39 of file uri.c.

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◆ write_option()

static void write_option	(	const uint8_t *	s,
		size_t	len,
		void *	data
	)

static

Definition at line 434 of file uri.c.

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Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ hexchar_to_dec

◆ ISEQUAL_CI

◆ min

◆ URI_DATA

Typedef Documentation

◆ coap_uri_check_t

◆ segment_handler_t

Enumeration Type Documentation

◆ coap_uri_check_t

Function Documentation

◆ check_segment()

◆ coap_clone_uri()

◆ coap_new_uri()

◆ coap_split_path_impl()

◆ coap_split_uri_sub()

◆ decode_segment()

◆ dots()

◆ is_unescaped_in_path()

◆ is_unescaped_in_query()

◆ make_decoded_option()

◆ strnchr()

◆ write_option()