sip_register_sent_by(3SIP)			   Session Initiation Protocol Library Functions			sip_register_sent_by(3SIP)

NAME

       sip_register_sent_by, sip_unregister_sent_by, sip_unregister_all_sent_by - allows registering and un-registering sent-by values

SYNOPSIS

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

       int sip_register_sent_by(char *val);

       void sip_unregister_sent_by(char *val);

       void sip_unregister_all_sent_by(int *error);

DESCRIPTION

       The  sip_register_sent_by()  function  can  be used to register a list of hostnames or IP addresses that the application may add to the VIA
       headers. The val is a comma separated list of such sent-by values. If any value is registered using sip_register_sent_by(), the	SIP  stack
       validates  incoming  responses  to  check  if  the sent-by parameter in the topmost VIA header is part of the registered list. If the check
       fails, the response is dropped. If there are no sent-by values registered, there is no check done on incoming responses.

       The sip_unregister_sent_by() and sip_unregister_all_sent_by() functions are used to un-register sent-by values. The  val  for  sip_unregis-
       ter_sent_by()  is a comma separated list of sent-by values that need to be un-registered. sip_unregister_all_sent_by() un-registers all the
       values that have been registered.

RETURN VALUES

       The sip_register_sent_by() function returns 0 on success and the appropriate error value on failure.

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

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libsip(3LIB)

SunOS 5.11							    25 Jan 2007 					sip_register_sent_by(3SIP)