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Twinkle 1.4.1 (Default branch)
01-31-2009
Twinkle is a software phone for voice over IP communications using the SIP protocol. You can use it for direct IP phone to IP phone communication, or in a network using a SIP proxy to route your calls. Some of the features offered are call waiting, call hold, 3-way conference call, call transfer, and call reject. It supports STUN or a statically configured public IP address for NAT traversal. When using STUN, it will send keep-alive packets to keep NAT bindings alive. It supports ZRTP for secure voice communication. License: GNU General Public License (GPL) Changes:|
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sip_hold_msg(3SIP) Session Initiation Protocol Library Functions sip_hold_msg(3SIP) NAME
sip_hold_msg, sip_free_msg - adds and removes a reference from a SIP message SYNOPSIS
cc [ flag ... ] file ... -lsip [ library ... ] #include <sip.h> void sip_hold_msg(sip_msg_t sip_msg); void sip_free_msg(sip_msg_t sip_msg); DESCRIPTION
The sip_hold_msg() function adds a reference to the SIP message passed as the argument. The reference is used to prevent the SIP message from being freed when in use. The sip_free_msg() function is used to remove an added reference on the SIP message passed as the argument. If this is the last reference on the SIP message (i.e. the number of references on the SIP message is 0), the SIP message is destroyed and associated resources freed. Freeing a SIP message does not set the sip_msg pointer to NULL. Applications should not expect the pointer to a freed SIP message to be NULL. RETURN VALUES
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_hold_msg(3SIP)