Message Body [SIP Headers]

The payload structure contains the optional message body. More...

Defines
#define	SIP_PAYLOAD_INIT2(data, length)
	Initialize a SIP payload structure with pointer to data and its length.
#define	sip_payload(sip)
	Access a SIP message payload structure sip_payload_t from sip_t.
#define	SIP_PAYLOAD_INIT()
	Initializer for structure sip_payload_t.
#define	SIPTAG_PAYLOAD(x)
	Tag list item for pointer to a message payload structure sip_payload_t.
#define	SIPTAG_PAYLOAD_REF(x)
	Tag list item for reference to a message payload pointer.
#define	SIPTAG_PAYLOAD_STR(s)
	Tag list item for string with message payload value.
#define	SIPTAG_PAYLOAD_STR_REF(x)
	Tag list item for reference to a message payload string.
Typedefs
typedef msg_payload_t	sip_payload_t
	The structure sip_payload_t contains representation of SIP message payload.
Functions
issize_t	sip_payload_d (su_home_t *, msg_header_t *, char *s, isize_t slen)
	Parse a SIP message payload.
issize_t	sip_payload_e (char b[], isize_t bsiz, msg_header_t const *h, int flags)
	Print a SIP message payload.
sip_payload_t *	sip_payload_init (sip_payload_t x[1])
	Initialize a structure sip_payload_t.
int	sip_is_payload (sip_header_t const *header)
	Test if header object is instance of sip_payload_t.
sip_payload_t *	sip_payload_dup (su_home_t *home, sip_payload_t const *hdr))
	Duplicate a list of message payload header structures sip_payload_t.
sip_payload_t *	sip_payload_copy (su_home_t *home, sip_payload_t const *hdr))
	Copy a list of message payload header structures sip_payload_t.
sip_payload_t *	sip_payload_make (su_home_t *home, char const *s))
	Make a message payload structure sip_payload_t.
sip_payload_t *	sip_payload_format (su_home_t *home, char const *fmt,...)))
	Make a message payload from formatting result.
sip_payload_t *	sip_payload_create (su_home_t *home, void const *data, isize_t len)
	Create a SIP payload structure.
Variables
msg_hclass_t	sip_payload_class []
	Header class for message payload.
tag_typedef_t	siptag_payload
	Tag for message payload object.
tag_typedef_t	siptag_payload_str
	Tag for string with message payload value.

---

Detailed Description

The payload structure contains the optional message body.

The message body stored in the sip_payload_t structure has no internal structure, but it is accessed as a byte array. Use SDP parser to parse SDP content, for instance.

The message body is stored in a sip_payload_t structure.

---

Define Documentation

#define SIP_PAYLOAD_INIT

(

)

Initializer for structure sip_payload_t.

A static sip_payload_t structure for message payload must be initialized with the SIP_PAYLOAD_INIT() macro. For instance,

  sip_payload_t sip_payload = SIP_PAYLOAD_INIT;

#define SIP_PAYLOAD_INIT2	(		data,
			length
	)

Initialize a SIP payload structure with pointer to data and its length.

The SIP_PAYLOAD_INIT2() macro initializes a sip_payload_t header structure with a pointer to data and its length in octets. For instance,

  sip_payload_t txt_payload = SIP_PAYLOAD_INIT2(txt, strlen(txt));

The SIP_PAYLOAD_INIT2() macro can be used when creating a new payload from heap is not required, for instance, when the resulting payload structure is immediately copied.

#define SIPTAG_PAYLOAD

(

x

)

Tag list item for pointer to a message payload structure sip_payload_t.

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

Parameters:

x

pointer to a sip_payload_t structure, or NULL.

The corresponding tag taking reference parameter is SIPTAG_PAYLOAD_REF().

#define SIPTAG_PAYLOAD_STR

(

s

)

Tag list item for string with message payload value.

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

Parameters:

s

pointer to a string containing message payload value, or NULL.

The string in SIPTAG_PAYLOAD_STR() can be converted to a sip_payload_t header structure by giving the string s has second argument to function sip_payload_make().

The corresponding tag taking reference parameter is SIPTAG_PAYLOAD_STR_REF().

---

Typedef Documentation

typedef struct sip_payload_s sip_payload_t

The structure sip_payload_t contains representation of SIP message payload.

The sip_payload_t is defined as follows:

 typedef struct sip_payload_s {
   msg_common_t    pl_common[1];      // Common fragment info
   msg_header_t   *pl_next;           // Next payload (if multipart message)
   char           *pl_data;           // Data - may contain NUL
   unsigned        pl_len;            // Length of message payload
 } sip_payload_t;

---

Function Documentation

int sip_is_payload

(

sip_header_t const *

header

)

[inline]

Test if header object is instance of sip_payload_t.

Check if the header class is an instance of message payload 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 payload
	0	(false) otherwise

sip_payload_t * sip_payload_copy	(	su_home_t *	home,
		sip_payload_t const *	hdr
	)			[inline]

Copy a list of message payload header structures sip_payload_t.

The function sip_payload_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

   payload = sip_payload_copy(home, sip->sip_payload);

Returns:

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

sip_payload_t* sip_payload_create	(	su_home_t *	home,
		void const *	data,
		isize_t	len
	)

Create a SIP payload structure.

Create a new SIP payload structure. it copies the given data to the the payload data, and NUL terminates it (it allocates one extra byte for NUL). If a NULL pointer is given as data, sip_payload_create() allocates and zeroes a data buffer of len bytes.

Parameters:

	home	memory home
	data	payload data
	len	payload length

Returns:

A pointer to newly created payload structure, if successful, and NULL upon an error.

sip_payload_t * sip_payload_dup	(	su_home_t *	home,
		sip_payload_t const *	hdr
	)			[inline]

Duplicate a list of message payload header structures sip_payload_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

   payload = sip_payload_dup(home, sip->sip_payload);

Returns:

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

sip_payload_t * sip_payload_format	(	su_home_t *	home,
		char const *	fmt,
			...
	)			[inline]

Make a message payload from formatting result.

Make a new sip_payload_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_payload_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_payload_t* sip_payload_init

(

sip_payload_t

x[1]

)

[inline]

Initialize a structure sip_payload_t.

An sip_payload_t structure for message payload can be initialized with the sip_payload_init() function/macro. For instance,

  sip_payload_t sip_payload;

  sip_payload_init(&sip_payload);

sip_payload_t * sip_payload_make	(	su_home_t *	home,
		char const *	s
	)			[inline]

Make a message payload structure sip_payload_t.

The function sip_payload_make() makes a new sip_payload_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_payload_t header structure, or NULL upon an error.

---

Variable Documentation

msg_hclass_t sip_payload_class[]

Header class for message payload.

The header class sip_payload_class defines how a SIP message payload is parsed and printed. It also contains methods used by SIP parser and other functions to manipulate the sip_payload_t header structure.