diff options
Diffstat (limited to 'include/rxrpc/connection.h')
| -rw-r--r-- | include/rxrpc/connection.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/include/rxrpc/connection.h b/include/rxrpc/connection.h new file mode 100644 index 000000000000..41e6781ad067 --- /dev/null +++ b/include/rxrpc/connection.h @@ -0,0 +1,83 @@ +/* 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 */ |