Message Payload
[SIP Headers]

Collaboration diagram for Message Payload:


Detailed Description

The payload object 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.


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_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.
#define SIPTAG_PAYLOAD_REF(x)
 Tag list item for reference to a 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 a message payload string.

Typedefs

typedef msg_payload_t sip_payload_t
 SIP payload.

Enumerator

 sip_payload_hash
 @

Hash of message payload.


Functions

sip_payload_tsip_payload_create (su_home_t *home, void const *data, int len)
 Create a SIP payload structure.
SOFIAPUBFUN int sip_payload_d (su_home_t *, msg_header_t *, char *s, int slen)
 Parse a message payload.
SOFIAPUBFUN int sip_payload_e (char b[], int bsiz, msg_header_t const *h, int flags)
 Print a message payload.
sip_payload_tsip_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_tsip_payload_dup (su_home_t *home, sip_payload_t const *hdr))
 Duplicate (deep copy) sip_payload_t.
sip_payload_tsip_payload_copy (su_home_t *home, sip_payload_t const *hdr))
 Copy a sip_payload_t header structure.
sip_payload_tsip_payload_make (su_home_t *home, char const *s))
 Make a header structure sip_payload_t.
sip_payload_tsip_payload_format (su_home_t *home, char const *fmt,...)))
 Make a message payload from formatting result.

Variables

tag_typedef_t siptag_payload
 Tag for message payload object.
tag_typedef_t siptag_payload_str
 Tag for string with message payload value.
msg_hclass_t sip_payload_class []
 Header class for SIP message payload.


Define Documentation

 
#define SIP_PAYLOAD_INIT (  ) 

Initializer for structure sip_payload_t.

A static sip_payload_t structure must be initialized. The SIP_PAYLOAD_INIT() macro provides initialization value. For instance,

#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 (  ) 

Tag list item for pointer to a message payload structure.

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

Parameters:
x pointer to a sip_payload_t header structure, or NULL.
The corresponding tag taking reference parameter is SIPTAG_PAYLOAD_REF().

#define SIPTAG_PAYLOAD_STR (  ) 

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 sip_payload_t 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

SIP 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;


Enumerator Documentation

sip_payload_hash

@

Hash of message payload.


Function Documentation

int sip_is_payload ( sip_header_t const *  header  )  [inline]

Test if header object is instance of sip_payload_t.

The function sip_is_payload() returns true (nonzero) if the header class is an instance of message payload object and false (zero) otherwise.

Parameters:
header pointer to the header structure to be tested
Returns:
The function sip_is_payload() returns true (nonzero) if the header object is an instance of header payload and false (zero) otherwise.

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

Copy a sip_payload_t header structure.

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 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:
The function sip_payload_copy() 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,
int  len 
)

Create a SIP payload structure.

The function sip_payload_create() creates 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
The function sip_payload_create() returns a pointer to newly creates 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 (deep copy) sip_payload_t.

The function sip_payload_dup() duplicates 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:
The function sip_payload_dup() 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.

The function sip_payload_format() makes a new message payload 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 uses the formatting result as the header value.

Parameters:
home memory home used to allocate new header structure.
fmt string used as a printf()-style format
... argument list for format
Note:
This function is usually implemented as a macro calling msg_header_format().
Returns:
The function sip_payload_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 can be initialized with the sip_payload_init() function/macro. For instance,

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

Make a header 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
Note:
This function is usually implemented as a macro calling sip_header_make().
Returns:
The function sip_payload_make() 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 SIP 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.


Sofia-SIP 1.12.1 - Copyright (C) 2006 Nokia Corporation. All rights reserved. Licensed under the terms of the GNU Lesser General Public License.