1#ifndef _NET_DN_NSP_H
2#define _NET_DN_NSP_H
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18void dn_nsp_send_data_ack(struct sock *sk);
19void dn_nsp_send_oth_ack(struct sock *sk);
20void dn_nsp_delayed_ack(struct sock *sk);
21void dn_send_conn_ack(struct sock *sk);
22void dn_send_conn_conf(struct sock *sk, gfp_t gfp);
23void dn_nsp_send_disc(struct sock *sk, unsigned char type,
24 unsigned short reason, gfp_t gfp);
25void dn_nsp_return_disc(struct sk_buff *skb, unsigned char type,
26 unsigned short reason);
27void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval);
28void dn_nsp_send_conninit(struct sock *sk, unsigned char flags);
29
30void dn_nsp_output(struct sock *sk);
31int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb,
32 struct sk_buff_head *q, unsigned short acknum);
33void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp,
34 int oob);
35unsigned long dn_nsp_persist(struct sock *sk);
36int dn_nsp_xmit_timeout(struct sock *sk);
37
38int dn_nsp_rx(struct sk_buff *);
39int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
40
41struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
42struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock,
43 long timeo, int *err);
44
45#define NSP_REASON_OK 0
46#define NSP_REASON_NR 1
47#define NSP_REASON_UN 2
48#define NSP_REASON_SD 3
49#define NSP_REASON_ID 4
50#define NSP_REASON_ER 5
51#define NSP_REASON_OB 6
52#define NSP_REASON_US 7
53#define NSP_REASON_TP 8
54#define NSP_REASON_EA 9
55#define NSP_REASON_IF 10
56#define NSP_REASON_LS 11
57#define NSP_REASON_LL 32
58#define NSP_REASON_LE 33
59#define NSP_REASON_UR 34
60#define NSP_REASON_UA 36
61#define NSP_REASON_TM 38
62#define NSP_REASON_NU 39
63#define NSP_REASON_NL 41
64#define NSP_REASON_DC 42
65#define NSP_REASON_IO 43
66
67#define NSP_DISCINIT 0x38
68#define NSP_DISCCONF 0x48
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75
76struct nsp_data_seg_msg {
77 __u8 msgflg;
78 __le16 dstaddr;
79 __le16 srcaddr;
80} __packed;
81
82struct nsp_data_opt_msg {
83 __le16 acknum;
84 __le16 segnum;
85 __le16 lsflgs;
86} __packed;
87
88struct nsp_data_opt_msg1 {
89 __le16 acknum;
90 __le16 segnum;
91} __packed;
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93
94
95struct nsp_data_ack_msg {
96 __u8 msgflg;
97 __le16 dstaddr;
98 __le16 srcaddr;
99 __le16 acknum;
100} __packed;
101
102
103struct nsp_conn_ack_msg {
104 __u8 msgflg;
105 __le16 dstaddr;
106} __packed;
107
108
109
110struct nsp_conn_init_msg {
111 __u8 msgflg;
112#define NSP_CI 0x18
113#define NSP_RCI 0x68
114 __le16 dstaddr;
115 __le16 srcaddr;
116 __u8 services;
117#define NSP_FC_NONE 0x00
118#define NSP_FC_SRC 0x04
119#define NSP_FC_SCMC 0x08
120#define NSP_FC_MASK 0x0c
121 __u8 info;
122 __le16 segsize;
123} __packed;
124
125
126struct nsp_disconn_init_msg {
127 __u8 msgflg;
128 __le16 dstaddr;
129 __le16 srcaddr;
130 __le16 reason;
131} __packed;
132
133
134
135struct srcobj_fmt {
136 __u8 format;
137 __u8 task;
138 __le16 grpcode;
139 __le16 usrcode;
140 __u8 dlen;
141} __packed;
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147
148static __inline__ int dn_before(__u16 seq1, __u16 seq2)
149{
150 seq1 &= 0x0fff;
151 seq2 &= 0x0fff;
152
153 return (int)((seq1 - seq2) & 0x0fff) > 2048;
154}
155
156
157static __inline__ int dn_after(__u16 seq1, __u16 seq2)
158{
159 seq1 &= 0x0fff;
160 seq2 &= 0x0fff;
161
162 return (int)((seq2 - seq1) & 0x0fff) > 2048;
163}
164
165static __inline__ int dn_equal(__u16 seq1, __u16 seq2)
166{
167 return ((seq1 ^ seq2) & 0x0fff) == 0;
168}
169
170static __inline__ int dn_before_or_equal(__u16 seq1, __u16 seq2)
171{
172 return (dn_before(seq1, seq2) || dn_equal(seq1, seq2));
173}
174
175static __inline__ void seq_add(__u16 *seq, __u16 off)
176{
177 (*seq) += off;
178 (*seq) &= 0x0fff;
179}
180
181static __inline__ int seq_next(__u16 seq1, __u16 seq2)
182{
183 return dn_equal(seq1 + 1, seq2);
184}
185
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188
189static __inline__ int sendack(__u16 seq)
190{
191 return (int)((seq & 0x1000) ? 0 : 1);
192}
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196
197static __inline__ int dn_congested(struct sock *sk)
198{
199 return atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1);
200}
201
202#define DN_MAX_NSP_DATA_HEADER (11)
203
204#endif
205