pj_stun_sock_cb Struct Reference
[STUN-aware socket transport]

Data Fields
pj_bool_t(*	on_rx_data )(pj_stun_sock stun_sock, void pkt, unsigned pkt_len, const pj_sockaddr_t *src_addr, unsigned addr_len)
pj_bool_t(*	on_data_sent )(pj_stun_sock stun_sock, pj_ioqueue_op_key_t send_key, pj_ssize_t sent)
pj_bool_t(*	on_status )(pj_stun_sock *stun_sock, pj_stun_sock_op op, pj_status_t status)

Detailed Description

This structure contains callbacks that will be called by the STUN transport to notify application about various events.

Notifification when asynchronous send operation has completed.

Parameters:

	stun_sock	The STUN transport.
	send_key	The send operation key that was given in pj_stun_sock_sendto().
	sent	If value is positive non-zero it indicates the number of data sent. When the value is negative, it contains the error code which can be retrieved by negating the value (i.e. status=-sent).

Returns:: Application should normally return PJ_TRUE to let the STUN transport continue its operation. However it must return PJ_FALSE if it has destroyed the STUN transport in this callback.

pj_bool_t(* pj_stun_sock_cb::on_rx_data)(pj_stun_sock *stun_sock, void *pkt, unsigned pkt_len, const pj_sockaddr_t *src_addr, unsigned addr_len)

Notification when incoming packet has been received.

Parameters:

	stun_sock	The STUN transport.
	data	The packet.
	data_len	Length of the packet.
	src_addr	The source address of the packet.
	addr_len	The length of the source address.

Returns:: Application should normally return PJ_TRUE to let the STUN transport continue its operation. However it must return PJ_FALSE if it has destroyed the STUN transport in this callback.

Notification when the status of the STUN transport has changed. This callback may be called for the following conditions:

the first time the publicly mapped address has been resolved from the STUN server, this callback will be called with op argument set to PJ_STUN_SOCK_BINDING_OP status argument set to PJ_SUCCESS.
anytime when the transport has detected that the publicly mapped address has changed, this callback will be called with op argument set to PJ_STUN_SOCK_KEEP_ALIVE_OP and status argument set to PJ_SUCCESS. On this case and the case above, application will get the resolved public address in the pj_stun_sock_info structure.
for any terminal error (such as STUN time-out, DNS resolution failure, or keep-alive failure), this callback will be called with the status argument set to non-PJ_SUCCESS.

Parameters:

	stun_sock	The STUN transport.
	op	The operation that triggers the callback.
	status	The status.

Returns:: Must return PJ_FALSE if it has destroyed the STUN transport in this callback. Application should normally destroy the socket and return PJ_FALSE upon encountering terminal error, otherwise it should return PJ_TRUE to let the STUN socket operation continues.

The documentation for this struct was generated from the following file: