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