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/* connection.h: Rx connection record
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _LINUX_RXRPC_CONNECTION_H
#define _LINUX_RXRPC_CONNECTION_H
#include <rxrpc/types.h>
#include <rxrpc/krxtimod.h>
struct sk_buff;
/*****************************************************************************/
/*
* Rx connection
* - connections are matched by (rmt_port,rmt_addr,service_id,conn_id,clientflag)
* - connections only retain a refcount on the peer when they are active
* - connections with refcount==0 are inactive and reside in the peer's graveyard
*/
struct rxrpc_connection
{
atomic_t usage;
struct rxrpc_transport *trans; /* transport endpoint */
struct rxrpc_peer *peer; /* peer from/to which connected */
struct rxrpc_service *service; /* responsible service (inbound conns) */
struct rxrpc_timer timeout; /* decaching timer */
struct list_head link; /* link in peer's list */
struct list_head proc_link; /* link in proc list */
struct list_head err_link; /* link in ICMP error processing list */
struct list_head id_link; /* link in ID grant list */
struct sockaddr_in addr; /* remote address */
struct rxrpc_call *channels[4]; /* channels (active calls) */
wait_queue_head_t chanwait; /* wait for channel to become available */
spinlock_t lock; /* access lock */
struct timeval atime; /* last access time */
size_t mtu_size; /* MTU size for outbound messages */
unsigned call_counter; /* call ID counter */
rxrpc_serial_t serial_counter; /* packet serial number counter */
/* the following should all be in net order */
__be32 in_epoch; /* peer's epoch */
__be32 out_epoch; /* my epoch */
__be32 conn_id; /* connection ID, appropriately shifted */
__be16 service_id; /* service ID */
uint8_t security_ix; /* security ID */
uint8_t in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
uint8_t out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
};
extern int rxrpc_create_connection(struct rxrpc_transport *trans,
__be16 port,
__be32 addr,
uint16_t service_id,
void *security,
struct rxrpc_connection **_conn);
extern int rxrpc_connection_lookup(struct rxrpc_peer *peer,
struct rxrpc_message *msg,
struct rxrpc_connection **_conn);
static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
{
BUG_ON(atomic_read(&conn->usage)<0);
atomic_inc(&conn->usage);
//printk("rxrpc_get_conn(%p{u=%d})\n",conn,atomic_read(&conn->usage));
}
extern void rxrpc_put_connection(struct rxrpc_connection *conn);
extern int rxrpc_conn_receive_call_packet(struct rxrpc_connection *conn,
struct rxrpc_call *call,
struct rxrpc_message *msg);
extern void rxrpc_conn_handle_error(struct rxrpc_connection *conn, int local, int errno);
#endif /* _LINUX_RXRPC_CONNECTION_H */
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