Min-SE Header [SIP Headers]

The Min-SE header is used to indicate the minimum value for the session interval. More...

Data Structures
struct	sip_min_se_s
	Structure for Min-SE header. More...
Defines
#define	sip_min_se(sip)
	Access a SIP Min-SE header structure sip_min_se_t from sip_t.
#define	SIP_MIN_SE_INIT()
	Initializer for structure sip_min_se_t.
#define	SIPTAG_MIN_SE(x)
	Tag list item for pointer to a Min-SE header structure sip_min_se_t.
#define	SIPTAG_MIN_SE_REF(x)
	Tag list item for reference to a Min-SE header pointer.
#define	SIPTAG_MIN_SE_STR(s)
	Tag list item for string with Min-SE header value.
#define	SIPTAG_MIN_SE_STR_REF(x)
	Tag list item for reference to a Min-SE header string.
Typedefs
typedef struct sip_min_se_s	sip_min_se_t
	The structure sip_min_se_t contains representation of the SIP Min-SE header.
Functions
issize_t	sip_min_se_d (su_home_t *, msg_header_t *, char *s, isize_t slen)
	Parse a SIP Min-SE header.
issize_t	sip_min_se_e (char b[], isize_t bsiz, msg_header_t const *h, int flags)
	Print a SIP Min-SE header.
sip_min_se_t *	sip_min_se_init (sip_min_se_t x[1])
	Initialize a structure sip_min_se_t.
int	sip_is_min_se (sip_header_t const *header)
	Test if header object is instance of sip_min_se_t.
sip_min_se_t *	sip_min_se_dup (su_home_t *home, sip_min_se_t const *hdr))
	Duplicate a list of Min-SE header header structures sip_min_se_t.
sip_min_se_t *	sip_min_se_copy (su_home_t *home, sip_min_se_t const *hdr))
	Copy a list of Min-SE header header structures sip_min_se_t.
sip_min_se_t *	sip_min_se_make (su_home_t *home, char const *s))
	Make a Min-SE header structure sip_min_se_t.
sip_min_se_t *	sip_min_se_format (su_home_t *home, char const *fmt,...)))
	Make a Min-SE header from formatting result.
Variables
msg_hclass_t	sip_min_se_class []
	Header class for Min-SE header.
tag_typedef_t	siptag_min_se
	Tag for Min-SE header object.
tag_typedef_t	siptag_min_se_str
	Tag for string with Min-SE header value.

---

Detailed Description

The Min-SE header is used to indicate the minimum value for the session interval.

Its syntax is defined in RFC 4028 as follows:

      MMin-SE  =  "Min-SE" HCOLON delta-seconds *(SEMI generic-param)

The parsed Min-SE header is stored in sip_min_se_t structure.

---

Define Documentation

#define SIP_MIN_SE_INIT

(

)

Initializer for structure sip_min_se_t.

A static sip_min_se_t structure for Min-SE header must be initialized with the SIP_MIN_SE_INIT() macro. For instance,

  sip_min_se_t sip_min_se = SIP_MIN_SE_INIT;

#define SIPTAG_MIN_SE

(

x

)

Tag list item for pointer to a Min-SE header structure sip_min_se_t.

The SIPTAG_MIN_SE() macro is used to include a tag item with a pointer to a sip_min_se_t structure in a tag list.

Parameters:

x

pointer to a sip_min_se_t structure, or NULL.

The corresponding tag taking reference parameter is SIPTAG_MIN_SE_REF().

#define SIPTAG_MIN_SE_STR

(

s

)

Tag list item for string with Min-SE header value.

The SIPTAG_MIN_SE_STR() macro is used to include a tag item with a string containing value of a sip_min_se_t header in a tag list.

Parameters:

s

pointer to a string containing Min-SE header value, or NULL.

The string in SIPTAG_MIN_SE_STR() can be converted to a sip_min_se_t header structure by giving the string s has second argument to function sip_min_se_make().

The corresponding tag taking reference parameter is SIPTAG_MIN_SE_STR_REF().

---

Typedef Documentation

typedef struct sip_min_se_s sip_min_se_t

The structure sip_min_se_t contains representation of the SIP Min-SE header.

The sip_min_se_t is defined as follows:

 typedef struct sip_min_se_s
 {
   sip_common_t    min_common[1];
   sip_unknown_t  *min_next;
   unsigned long   min_delta;   // Delta seconds
   sip_params_t   *min_params;  // List of extension parameters
 } sip_min_se_t;

---

Function Documentation

int sip_is_min_se

(

sip_header_t const *

header

)

[inline]

Test if header object is instance of sip_min_se_t.

Check if the header class is an instance of Min-SE header object and return true (nonzero), otherwise return false (zero).

Parameters:

header

pointer to the header structure to be tested

Return values:

	1	(true) if the header is an instance of header min_se
	0	(false) otherwise

sip_min_se_t * sip_min_se_copy	(	su_home_t *	home,
		sip_min_se_t const *	hdr
	)			[inline]

Copy a list of Min-SE header header structures sip_min_se_t.

The function sip_min_se_copy() copies a header structure hdr. If the header structure hdr contains a reference (hdr->h_next) to a list of headers, all the headers in that list are copied, too. The function uses given memory home to allocate all the memory areas used to copy the list of header structure hdr.

Parameters:

	home	memory home used to allocate new structure
	hdr	pointer to the header structure to be copied

When copying, only the header structure and parameter lists attached to it are duplicated. The new header structure retains all the references to the strings within the old hdr header, including the encoding of the old header, if present.

Example

   min_se = sip_min_se_copy(home, sip->sip_min_se);

Returns:

A pointer to newly copied header structure, or NULL upon an error.

sip_min_se_t * sip_min_se_dup	(	su_home_t *	home,
		sip_min_se_t const *	hdr
	)			[inline]

Duplicate a list of Min-SE header header structures sip_min_se_t.

Duplicate a header structure hdr. If the header structure hdr contains a reference (hdr->x_next) to a list of headers, all the headers in the list are duplicated, too.

Parameters:

	home	memory home used to allocate new structure
	hdr	header structure to be duplicated

When duplicating, all parameter lists and non-constant strings attached to the header are copied, too. The function uses given memory home to allocate all the memory areas used to copy the header.

Example

   min_se = sip_min_se_dup(home, sip->sip_min_se);

Returns:

A pointer to the newly duplicated sip_min_se_t header structure, or NULL upon an error.

sip_min_se_t * sip_min_se_format	(	su_home_t *	home,
		char const *	fmt,
			...
	)			[inline]

Make a Min-SE header from formatting result.

Make a new sip_min_se_t object using formatting result as its value. The function first prints the arguments according to the format fmt specified. Then it allocates a new header structure, and parses the formatting result to the structure sip_min_se_t.

Parameters:

	home	memory home used to allocate new header structure.
	fmt	string used as a printf()-style format
	...	argument list for format

Returns:

A pointer to newly makes header structure, or NULL upon an error.

sip_min_se_t* sip_min_se_init

(

sip_min_se_t

x[1]

)

[inline]

Initialize a structure sip_min_se_t.

An sip_min_se_t structure for Min-SE header can be initialized with the sip_min_se_init() function/macro. For instance,

  sip_min_se_t sip_min_se;

  sip_min_se_init(&sip_min_se);

sip_min_se_t * sip_min_se_make	(	su_home_t *	home,
		char const *	s
	)			[inline]

Make a Min-SE header structure sip_min_se_t.

The function sip_min_se_make() makes a new sip_min_se_t header structure. It allocates a new header structure, and decodes the string s as the value of the structure.

Parameters:

	home	memory home used to allocate new header structure.
	s	string to be decoded as value of the new header structure

Returns:

A pointer to newly maked sip_min_se_t header structure, or NULL upon an error.

---

Variable Documentation

msg_hclass_t sip_min_se_class[]

Header class for Min-SE header.

The header class sip_min_se_class defines how a SIP Min-SE header is parsed and printed. It also contains methods used by SIP parser and other functions to manipulate the sip_min_se_t header structure.