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/*********************************************************************
*
* Filename: irttp.h
* Version: 1.0
* Description: Tiny Transport Protocol (TTP) definitions
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sun Aug 31 20:14:31 1997
* Modified at: Mon Sep 27 11:38:01 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
*
* 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.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#ifndef IRTTP_H
#define IRTTP_H
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <net/irda/irda.h>
#include <net/irda/irlmp.h>
#include <net/irda/qos.h>
#include <net/irda/irqueue.h>
#define TTP_MAX_CONNECTIONS LM_MAX_CONNECTIONS
#define TTP_HEADER 1
#define TTP_MAX_HEADER (TTP_HEADER + LMP_MAX_HEADER)
#define TTP_SAR_HEADER 5
#define TTP_PARAMETERS 0x80
#define TTP_MORE 0x80
#define DEFAULT_INITIAL_CREDIT 14
#define LOW_THRESHOLD 4
#define HIGH_THRESHOLD 10
#define TTP_MAX_QUEUE 14
/* Some priorities for disconnect requests */
#define P_NORMAL 0
#define P_HIGH 1
#define SAR_DISABLE 0
#define SAR_UNBOUND 0xffffffff
/* Parameters */
#define TTP_MAX_SDU_SIZE 0x01
/*
* This structure contains all data assosiated with one instance of a TTP
* connection.
*/
struct tsap_cb {
QUEUE queue; /* For linking it into the hashbin */
magic_t magic; /* Just in case */
__u8 stsap_sel; /* Source TSAP */
__u8 dtsap_sel; /* Destination TSAP */
struct lsap_cb *lsap; /* Corresponding LSAP to this TSAP */
__u8 connected; /* TSAP connected */
__u8 initial_credit; /* Initial credit to give peer */
int avail_credit; /* Available credit to return to peer */
int remote_credit; /* Credit held by peer TTP entity */
int send_credit; /* Credit held by local TTP entity */
struct sk_buff_head tx_queue; /* Frames to be transmitted */
struct sk_buff_head rx_queue; /* Received frames */
struct sk_buff_head rx_fragments;
int tx_queue_lock;
int rx_queue_lock;
spinlock_t lock;
notify_t notify; /* Callbacks to client layer */
struct irda_statistics stats;
struct timer_list todo_timer;
__u32 max_seg_size; /* Max data that fit into an IrLAP frame */
__u8 max_header_size;
int rx_sdu_busy; /* RxSdu.busy */
__u32 rx_sdu_size; /* Current size of a partially received frame */
__u32 rx_max_sdu_size; /* Max receive user data size */
int tx_sdu_busy; /* TxSdu.busy */
__u32 tx_max_sdu_size; /* Max transmit user data size */
int close_pend; /* Close, but disconnect_pend */
int disconnect_pend; /* Disconnect, but still data to send */
struct sk_buff *disconnect_skb;
};
struct irttp_cb {
magic_t magic;
hashbin_t *tsaps;
};
int irttp_init(void);
void irttp_cleanup(void);
struct tsap_cb *irttp_open_tsap(__u8 stsap_sel, int credit, notify_t *notify);
int irttp_close_tsap(struct tsap_cb *self);
int irttp_data_request(struct tsap_cb *self, struct sk_buff *skb);
int irttp_udata_request(struct tsap_cb *self, struct sk_buff *skb);
int irttp_connect_request(struct tsap_cb *self, __u8 dtsap_sel,
__u32 saddr, __u32 daddr,
struct qos_info *qos, __u32 max_sdu_size,
struct sk_buff *userdata);
int irttp_connect_response(struct tsap_cb *self, __u32 max_sdu_size,
struct sk_buff *userdata);
int irttp_disconnect_request(struct tsap_cb *self, struct sk_buff *skb,
int priority);
void irttp_flow_request(struct tsap_cb *self, LOCAL_FLOW flow);
struct tsap_cb *irttp_dup(struct tsap_cb *self, void *instance);
static __inline __u32 irttp_get_saddr(struct tsap_cb *self)
{
return irlmp_get_saddr(self->lsap);
}
static __inline __u32 irttp_get_daddr(struct tsap_cb *self)
{
return irlmp_get_daddr(self->lsap);
}
static __inline __u32 irttp_get_max_seq_size(struct tsap_cb *self)
{
return self->max_seg_size;
}
extern struct irttp_cb *irttp;
#endif /* IRTTP_H */
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