/* 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 */