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man pages section 3: Networking Library Functions

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Updated: July 2017



sip_parse_uri, sip_free_parsed_uri - parse a URI and free a parsed URI


cc [ flag ... ] file ... –lsip [ library ... ]
#include <sip.h>

sip_uri_t sip_parse_uri(sip_str_t *uri_str, 
     int *error);
void sip_free_parsed_uri(sip_uri_t sip_uri);


For functions that return a pointer of type sip_str_t, sip_str_t is supplied by:

typedef struct sip_str {
     char *sip_str_ptr;
     int  sip_str_len;

The sip_str_ptr parameter points to the start of the returned value and sip_str_len supplies the length of the returned value.

For example, given the following request line in a SIP message input to sip_get_request_uri_str():

INVITE sip:marconi@radio.org SIP/2.0

the return is a pointer to sip_str_t with the sip_str_ptr member pointing to “s” of sip:marconi@radio.org and sip_str_len being set to 21, the length of sip:marconi@radio.org.

The sip_parse_uri() function takes a URI string in the form sip_str_t and returns a parsed URI sip_uri. The syntax of the URI is as specified in RFC 3261, section 25.1. If the parser encounters an error when parsing a component, it sets the appropriate error bit in the error flags and proceeds to the next component, if present.

The sip_free_parsed_uri() function takes a parsed URI sip_uri, obtained from sip_parse_uri(), and frees any associated memory.

Return Values

The sip_parse_uri() function returns the parsed URI sip_uri on success. It returns a NULL if memory cannot be allocated for the parsed URI.

The value of errno is not changed by these calls in the event of an error.


If the error is non-null, the following values is set:


The SIP header value of the SIP message is NULL or there is no URI.

The input URI is null or the requested URI component is invalid. The error flag is set for the requested component.

The URI parameters or headers are requested from a non-SIP[S] URI; or the 'opaque', 'query', 'path', 'reg-name' components are requested from a SIP[S] URI.

On success, the value of the location pointed to by error is set to 0.


See attributes(5) for descriptions of the following attributes:

Interface Stability

See Also