/* * net/tipc/link.h: Include file for TIPC link code * * Copyright (c) 1995-2006, 2013-2014, Ericsson AB * Copyright (c) 2004-2005, 2010-2011, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither the names of the copyright holders nor the names of its *    contributors may be used to endorse or promote products derived from *    this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _TIPC_LINK_H#define _TIPC_LINK_H #include <net/genetlink.h>#include "msg.h"#include "node.h" /* TIPC-specific error codes*/#define ELINKCONG EAGAIN	/* link congestion <=> resource unavailable */ /* Link FSM events: */enum {	LINK_ESTABLISH_EVT       = 0xec1ab1e,	LINK_PEER_RESET_EVT      = 0x9eed0e,	LINK_FAILURE_EVT         = 0xfa110e,	LINK_RESET_EVT           = 0x10ca1d0e,	LINK_FAILOVER_BEGIN_EVT  = 0xfa110bee,	LINK_FAILOVER_END_EVT    = 0xfa110ede,	LINK_SYNCH_BEGIN_EVT     = 0xc1ccbee,	LINK_SYNCH_END_EVT       = 0xc1ccede}; /* Events returned from link at packet reception or at timeout */enum {	TIPC_LINK_UP_EVT       = 1,	TIPC_LINK_DOWN_EVT     = (1 << 1),	TIPC_LINK_SND_STATE    = (1 << 2)}; /* Starting value for maximum packet size negotiation on unicast links * (unless bearer MTU is less) */#define MAX_PKT_DEFAULT 1500 bool tipc_link_create(struct net *net, char *if_name, int bearer_id,		      int tolerance, char net_plane, u32 mtu, int priority,		      u32 min_win, u32 max_win, u32 session, u32 ownnode,		      u32 peer, u8 *peer_id, u16 peer_caps,		      struct tipc_link *bc_sndlink,		      struct tipc_link *bc_rcvlink,		      struct sk_buff_head *inputq,		      struct sk_buff_head *namedq,		      struct tipc_link **link);bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer, u8 *peer_id,			 int mtu, u32 min_win, u32 max_win, u16 peer_caps,			 struct sk_buff_head *inputq,			 struct sk_buff_head *namedq,			 struct tipc_link *bc_sndlink,			 struct tipc_link **link);void tipc_link_tnl_prepare(struct tipc_link *l, struct tipc_link *tnl,			   int mtyp, struct sk_buff_head *xmitq);void tipc_link_create_dummy_tnl_msg(struct tipc_link *tnl,				    struct sk_buff_head *xmitq);void tipc_link_failover_prepare(struct tipc_link *l, struct tipc_link *tnl,				struct sk_buff_head *xmitq);void tipc_link_build_reset_msg(struct tipc_link *l, struct sk_buff_head *xmitq);int tipc_link_fsm_evt(struct tipc_link *l, int evt);bool tipc_link_is_up(struct tipc_link *l);bool tipc_link_peer_is_down(struct tipc_link *l);bool tipc_link_is_reset(struct tipc_link *l);bool tipc_link_is_establishing(struct tipc_link *l);bool tipc_link_is_synching(struct tipc_link *l);bool tipc_link_is_failingover(struct tipc_link *l);bool tipc_link_is_blocked(struct tipc_link *l);void tipc_link_set_active(struct tipc_link *l, bool active);void tipc_link_reset(struct tipc_link *l);void tipc_link_reset_stats(struct tipc_link *l);int tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list,		   struct sk_buff_head *xmitq);struct sk_buff_head *tipc_link_inputq(struct tipc_link *l);u16 tipc_link_rcv_nxt(struct tipc_link *l);u16 tipc_link_acked(struct tipc_link *l);u32 tipc_link_id(struct tipc_link *l);char *tipc_link_name(struct tipc_link *l);u32 tipc_link_state(struct tipc_link *l);char tipc_link_plane(struct tipc_link *l);int tipc_link_prio(struct tipc_link *l);int tipc_link_min_win(struct tipc_link *l);int tipc_link_max_win(struct tipc_link *l);void tipc_link_update_caps(struct tipc_link *l, u16 capabilities);bool tipc_link_validate_msg(struct tipc_link *l, struct tipc_msg *hdr);unsigned long tipc_link_tolerance(struct tipc_link *l);void tipc_link_set_tolerance(struct tipc_link *l, u32 tol,			     struct sk_buff_head *xmitq);void tipc_link_set_prio(struct tipc_link *l, u32 prio,			struct sk_buff_head *xmitq);void tipc_link_set_abort_limit(struct tipc_link *l, u32 limit);void tipc_link_set_queue_limits(struct tipc_link *l, u32 min_win, u32 max_win);int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg,		       struct tipc_link *link, int nlflags);int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq);int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,		  struct sk_buff_head *xmitq);int tipc_link_build_state_msg(struct tipc_link *l, struct sk_buff_head *xmitq);void tipc_link_add_bc_peer(struct tipc_link *snd_l,			   struct tipc_link *uc_l,			   struct sk_buff_head *xmitq);void tipc_link_remove_bc_peer(struct tipc_link *snd_l,			      struct tipc_link *rcv_l,			      struct sk_buff_head *xmitq);int tipc_link_bc_peers(struct tipc_link *l);void tipc_link_set_mtu(struct tipc_link *l, int mtu);int tipc_link_mtu(struct tipc_link *l);int tipc_link_mss(struct tipc_link *l);u16 tipc_get_gap_ack_blks(struct tipc_gap_ack_blks **ga, struct tipc_link *l,			  struct tipc_msg *hdr, bool uc);int tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked, u16 gap,			 struct tipc_gap_ack_blks *ga,			 struct sk_buff_head *xmitq,			 struct sk_buff_head *retrq);void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr);int tipc_link_bc_sync_rcv(struct tipc_link *l,   struct tipc_msg *hdr,			  struct sk_buff_head *xmitq);int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb,			  struct sk_buff_head *xmitq);bool tipc_link_too_silent(struct tipc_link *l);struct net *tipc_link_net(struct tipc_link *l);#endif