1 /*********************************************************************
2 *
3 * Filename: irttp.h
4 * Version: 1.0
5 * Description: Tiny Transport Protocol (TTP) definitions
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun Aug 31 20:14:31 1997
9 * Modified at: Sun Dec 12 13:09:07 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
19 *
20 * Neither Dag Brattli nor University of Tromsų admit liability nor
21 * provide warranty for any of this software. This material is
22 * provided "AS-IS" and at no charge.
23 *
24 ********************************************************************/
25
26 #ifndef IRTTP_H
27 #define IRTTP_H
28
29 #include <linux/types.h>
30 #include <linux/skbuff.h>
31 #include <linux/spinlock.h>
32
33 #include <net/irda/irda.h>
34 #include <net/irda/irlmp.h>
35 #include <net/irda/qos.h>
36 #include <net/irda/irqueue.h>
37
38 #define TTP_MAX_CONNECTIONS LM_MAX_CONNECTIONS
39 #define TTP_HEADER 1
40 #define TTP_MAX_HEADER (TTP_HEADER + LMP_MAX_HEADER)
41 #define TTP_SAR_HEADER 5
42 #define TTP_PARAMETERS 0x80
43 #define TTP_MORE 0x80
44
45 #define DEFAULT_INITIAL_CREDIT 14
46
47 #define TTP_LOW_THRESHOLD 4
48 #define TTP_HIGH_THRESHOLD 10
49 #define TTP_MAX_QUEUE 14
50
51 /* Some priorities for disconnect requests */
52 #define P_NORMAL 0
53 #define P_HIGH 1
54
55 #define TTP_SAR_DISABLE 0
56 #define TTP_SAR_UNBOUND 0xffffffff
57
58 /* Parameters */
59 #define TTP_MAX_SDU_SIZE 0x01
60
61 /*
62 * This structure contains all data assosiated with one instance of a TTP
63 * connection.
64 */
65 struct tsap_cb {
66 irda_queue_t q; /* Must be first */
67 magic_t magic; /* Just in case */
68
69 __u8 stsap_sel; /* Source TSAP */
70 __u8 dtsap_sel; /* Destination TSAP */
71
72 struct lsap_cb *lsap; /* Corresponding LSAP to this TSAP */
73
74 __u8 connected; /* TSAP connected */
75
76 __u8 initial_credit; /* Initial credit to give peer */
77
78 int avail_credit; /* Available credit to return to peer */
79 int remote_credit; /* Credit held by peer TTP entity */
80 int send_credit; /* Credit held by local TTP entity */
81
82 struct sk_buff_head tx_queue; /* Frames to be transmitted */
83 struct sk_buff_head rx_queue; /* Received frames */
84 struct sk_buff_head rx_fragments;
85 int tx_queue_lock;
86 int rx_queue_lock;
87 spinlock_t lock;
88
89 notify_t notify; /* Callbacks to client layer */
90
91 struct net_device_stats stats;
92 struct timer_list todo_timer;
93
94 __u32 max_seg_size; /* Max data that fit into an IrLAP frame */
95 __u8 max_header_size;
96
97 int rx_sdu_busy; /* RxSdu.busy */
98 __u32 rx_sdu_size; /* Current size of a partially received frame */
99 __u32 rx_max_sdu_size; /* Max receive user data size */
100
101 int tx_sdu_busy; /* TxSdu.busy */
102 __u32 tx_max_sdu_size; /* Max transmit user data size */
103
104 int close_pend; /* Close, but disconnect_pend */
105 int disconnect_pend; /* Disconnect, but still data to send */
106 struct sk_buff *disconnect_skb;
107 };
108
109 struct irttp_cb {
110 magic_t magic;
111 hashbin_t *tsaps;
112 };
113
114 int irttp_init(void);
115 void irttp_cleanup(void);
116
117 struct tsap_cb *irttp_open_tsap(__u8 stsap_sel, int credit, notify_t *notify);
118 int irttp_close_tsap(struct tsap_cb *self);
119
120 int irttp_data_request(struct tsap_cb *self, struct sk_buff *skb);
121 int irttp_udata_request(struct tsap_cb *self, struct sk_buff *skb);
122
123 int irttp_connect_request(struct tsap_cb *self, __u8 dtsap_sel,
124 __u32 saddr, __u32 daddr,
125 struct qos_info *qos, __u32 max_sdu_size,
126 struct sk_buff *userdata);
127 int irttp_connect_response(struct tsap_cb *self, __u32 max_sdu_size,
128 struct sk_buff *userdata);
129 int irttp_disconnect_request(struct tsap_cb *self, struct sk_buff *skb,
130 int priority);
131 void irttp_flow_request(struct tsap_cb *self, LOCAL_FLOW flow);
132 void irttp_status_indication(void *instance,
133 LINK_STATUS link, LOCK_STATUS lock);
134 struct tsap_cb *irttp_dup(struct tsap_cb *self, void *instance);
135
136 static __inline __u32 irttp_get_saddr(struct tsap_cb *self)
137 {
138 return irlmp_get_saddr(self->lsap);
139 }
140
141 static __inline __u32 irttp_get_daddr(struct tsap_cb *self)
142 {
143 return irlmp_get_daddr(self->lsap);
144 }
145
146 static __inline __u32 irttp_get_max_seg_size(struct tsap_cb *self)
147 {
148 return self->max_seg_size;
149 }
150
151 extern struct irttp_cb *irttp;
152
153 #endif /* IRTTP_H */
154
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