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/* net/tipc/socket.h: Include file for TIPC socket code
*
* Copyright (c) 2014, Ericsson AB
* 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_SOCK_H
#define _TIPC_SOCK_H
#include <net/sock.h>
#include "msg.h"
#define TIPC_CONN_OK 0
#define TIPC_CONN_PROBING 1
#define TIPC_CONNACK_INTV 256
#define TIPC_FLOWCTRL_WIN (TIPC_CONNACK_INTV * 2)
#define TIPC_CONN_OVERLOAD_LIMIT ((TIPC_FLOWCTRL_WIN * 2 + 1) * \
SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
/**
* struct tipc_port - TIPC port structure
* @lock: pointer to spinlock for controlling access to port
* @connected: non-zero if port is currently connected to a peer port
* @conn_type: TIPC type used when connection was established
* @conn_instance: TIPC instance used when connection was established
* @published: non-zero if port has one or more associated names
* @max_pkt: maximum packet size "hint" used when building messages sent by port
* @ref: unique reference to port in TIPC object registry
* @phdr: preformatted message header used when sending messages
* @port_list: adjacent ports in TIPC's global list of ports
* @publications: list of publications for port
* @pub_count: total # of publications port has made during its lifetime
* @probing_state:
* @probing_interval:
* @timer_ref:
*/
struct tipc_port {
int connected;
u32 conn_type;
u32 conn_instance;
int published;
u32 max_pkt;
u32 ref;
struct tipc_msg phdr;
struct list_head port_list;
struct list_head publications;
u32 pub_count;
u32 probing_state;
u32 probing_interval;
struct timer_list timer;
};
/**
* struct tipc_sock - TIPC socket structure
* @sk: socket - interacts with 'port' and with user via the socket API
* @port: port - interacts with 'sk' and with the rest of the TIPC stack
* @peer_name: the peer of the connection, if any
* @conn_timeout: the time we can wait for an unresponded setup request
* @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
* @link_cong: non-zero if owner must sleep because of link congestion
* @sent_unacked: # messages sent by socket, and not yet acked by peer
* @rcv_unacked: # messages read by user, but not yet acked back to peer
*/
struct tipc_sock {
struct sock sk;
struct tipc_port port;
unsigned int conn_timeout;
atomic_t dupl_rcvcnt;
bool link_cong;
uint sent_unacked;
uint rcv_unacked;
};
static inline struct tipc_sock *tipc_sk(const struct sock *sk)
{
return container_of(sk, struct tipc_sock, sk);
}
static inline struct tipc_sock *tipc_port_to_sock(const struct tipc_port *port)
{
return container_of(port, struct tipc_sock, port);
}
static inline int tipc_sk_conn_cong(struct tipc_sock *tsk)
{
return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN;
}
int tipc_sk_rcv(struct sk_buff *buf);
struct sk_buff *tipc_sk_socks_show(void);
void tipc_sk_mcast_rcv(struct sk_buff *buf);
void tipc_sk_reinit(void);
#endif
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