linux/net/llc/llc_if.c

/*
 * llc_if.c - Defines LLC interface to upper layer
 *
 * Copyright (c) 1997 by Procom Technology, Inc.
 * 		 2001-2003 by Arnaldo Carvalho de Melo <[email protected]>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */
#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/errno.h>
#include <net/llc_if.h>
#include <net/llc_sap.h>
#include <net/llc_s_ev.h>
#include <net/llc_conn.h>
#include <net/sock.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_st.h>
#include <net/tcp_states.h>

/**
 *	llc_build_and_send_pkt - Connection data sending for upper layers.
 *	@sk: connection
 *	@skb: packet to send
 *
 *	This function is called when upper layer wants to send data using
 *	connection oriented communication mode. During sending data, connection
 *	will be locked and received frames and expired timers will be queued.
 *	Returns 0 for success, -ECONNABORTED when the connection already
 *	closed and -EBUSY when sending data is not permitted in this state or
 *	LLC has send an I pdu with p bit set to 1 and is waiting for it's
 *	response.
 *
 *	This function always consumes a reference to the skb.
 */
int llc_build_and_send_pkt(struct sock *sk, struct sk_buff *skb)
{ … }

/**
 *	llc_establish_connection - Called by upper layer to establish a conn
 *	@sk: connection
 *	@lmac: local mac address
 *	@dmac: destination mac address
 *	@dsap: destination sap
 *
 *	Upper layer calls this to establish an LLC connection with a remote
 *	machine. This function packages a proper event and sends it connection
 *	component state machine. Success or failure of connection
 *	establishment will inform to upper layer via calling it's confirm
 *	function and passing proper information.
 */
int llc_establish_connection(struct sock *sk, const u8 *lmac, u8 *dmac, u8 dsap)
{ … }

/**
 *	llc_send_disc - Called by upper layer to close a connection
 *	@sk: connection to be closed
 *
 *	Upper layer calls this when it wants to close an established LLC
 *	connection with a remote machine. This function packages a proper event
 *	and sends it to connection component state machine. Returns 0 for
 *	success, 1 otherwise.
 */
int llc_send_disc(struct sock *sk)
{ … }