1#ifndef _NET_DN_NSP_H
2#define _NET_DN_NSP_H
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18extern void dn_nsp_send_data_ack(struct sock *sk);
19extern void dn_nsp_send_oth_ack(struct sock *sk);
20extern void dn_nsp_delayed_ack(struct sock *sk);
21extern void dn_send_conn_ack(struct sock *sk);
22extern void dn_send_conn_conf(struct sock *sk, gfp_t gfp);
23extern void dn_nsp_send_disc(struct sock *sk, unsigned char type,
24 unsigned short reason, gfp_t gfp);
25extern void dn_nsp_return_disc(struct sk_buff *skb, unsigned char type,
26 unsigned short reason);
27extern void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval);
28extern void dn_nsp_send_conninit(struct sock *sk, unsigned char flags);
29
30extern void dn_nsp_output(struct sock *sk);
31extern int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum);
32extern void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp, int oob);
33extern unsigned long dn_nsp_persist(struct sock *sk);
34extern int dn_nsp_xmit_timeout(struct sock *sk);
35
36extern int dn_nsp_rx(struct sk_buff *);
37extern int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
38
39extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
40extern struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock, long timeo, int *err);
41
42#define NSP_REASON_OK 0
43#define NSP_REASON_NR 1
44#define NSP_REASON_UN 2
45#define NSP_REASON_SD 3
46#define NSP_REASON_ID 4
47#define NSP_REASON_ER 5
48#define NSP_REASON_OB 6
49#define NSP_REASON_US 7
50#define NSP_REASON_TP 8
51#define NSP_REASON_EA 9
52#define NSP_REASON_IF 10
53#define NSP_REASON_LS 11
54#define NSP_REASON_LL 32
55#define NSP_REASON_LE 33
56#define NSP_REASON_UR 34
57#define NSP_REASON_UA 36
58#define NSP_REASON_TM 38
59#define NSP_REASON_NU 39
60#define NSP_REASON_NL 41
61#define NSP_REASON_DC 42
62#define NSP_REASON_IO 43
63
64#define NSP_DISCINIT 0x38
65#define NSP_DISCCONF 0x48
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72
73struct nsp_data_seg_msg {
74 __u8 msgflg;
75 __le16 dstaddr;
76 __le16 srcaddr;
77} __packed;
78
79struct nsp_data_opt_msg {
80 __le16 acknum;
81 __le16 segnum;
82 __le16 lsflgs;
83} __packed;
84
85struct nsp_data_opt_msg1 {
86 __le16 acknum;
87 __le16 segnum;
88} __packed;
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92struct nsp_data_ack_msg {
93 __u8 msgflg;
94 __le16 dstaddr;
95 __le16 srcaddr;
96 __le16 acknum;
97} __packed;
98
99
100struct nsp_conn_ack_msg {
101 __u8 msgflg;
102 __le16 dstaddr;
103} __packed;
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105
106
107struct nsp_conn_init_msg {
108 __u8 msgflg;
109#define NSP_CI 0x18
110#define NSP_RCI 0x68
111 __le16 dstaddr;
112 __le16 srcaddr;
113 __u8 services;
114#define NSP_FC_NONE 0x00
115#define NSP_FC_SRC 0x04
116#define NSP_FC_SCMC 0x08
117#define NSP_FC_MASK 0x0c
118 __u8 info;
119 __le16 segsize;
120} __packed;
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122
123struct nsp_disconn_init_msg {
124 __u8 msgflg;
125 __le16 dstaddr;
126 __le16 srcaddr;
127 __le16 reason;
128} __packed;
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132struct srcobj_fmt {
133 __u8 format;
134 __u8 task;
135 __le16 grpcode;
136 __le16 usrcode;
137 __u8 dlen;
138} __packed;
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144
145static __inline__ int dn_before(__u16 seq1, __u16 seq2)
146{
147 seq1 &= 0x0fff;
148 seq2 &= 0x0fff;
149
150 return (int)((seq1 - seq2) & 0x0fff) > 2048;
151}
152
153
154static __inline__ int dn_after(__u16 seq1, __u16 seq2)
155{
156 seq1 &= 0x0fff;
157 seq2 &= 0x0fff;
158
159 return (int)((seq2 - seq1) & 0x0fff) > 2048;
160}
161
162static __inline__ int dn_equal(__u16 seq1, __u16 seq2)
163{
164 return ((seq1 ^ seq2) & 0x0fff) == 0;
165}
166
167static __inline__ int dn_before_or_equal(__u16 seq1, __u16 seq2)
168{
169 return (dn_before(seq1, seq2) || dn_equal(seq1, seq2));
170}
171
172static __inline__ void seq_add(__u16 *seq, __u16 off)
173{
174 (*seq) += off;
175 (*seq) &= 0x0fff;
176}
177
178static __inline__ int seq_next(__u16 seq1, __u16 seq2)
179{
180 return dn_equal(seq1 + 1, seq2);
181}
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185
186static __inline__ int sendack(__u16 seq)
187{
188 return (int)((seq & 0x1000) ? 0 : 1);
189}
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193
194static __inline__ int dn_congested(struct sock *sk)
195{
196 return atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1);
197}
198
199#define DN_MAX_NSP_DATA_HEADER (11)
200
201#endif
202