1 #ifndef _NET_DN_H
2 #define _NET_DN_H
3
4 #include <linux/dn.h>
5 #include <asm/byteorder.h>
6
7 typedef unsigned short dn_address;
8
9 #define dn_ntohs(x) le16_to_cpu((unsigned short)(x))
10 #define dn_htons(x) cpu_to_le16((unsigned short)(x))
11
12 #define DN_SK(sk) (&sk->protinfo.dn)
13
14 struct dn_scp /* Session Control Port */
15 {
16 unsigned char state;
17 #define DN_O 1 /* Open */
18 #define DN_CR 2 /* Connect Receive */
19 #define DN_DR 3 /* Disconnect Reject */
20 #define DN_DRC 4 /* Discon. Rej. Complete*/
21 #define DN_CC 5 /* Connect Confirm */
22 #define DN_CI 6 /* Connect Initiate */
23 #define DN_NR 7 /* No resources */
24 #define DN_NC 8 /* No communication */
25 #define DN_CD 9 /* Connect Delivery */
26 #define DN_RJ 10 /* Rejected */
27 #define DN_RUN 11 /* Running */
28 #define DN_DI 12 /* Disconnect Initiate */
29 #define DN_DIC 13 /* Disconnect Complete */
30 #define DN_DN 14 /* Disconnect Notificat */
31 #define DN_CL 15 /* Closed */
32 #define DN_CN 16 /* Closed Notification */
33
34 unsigned short addrloc;
35 unsigned short addrrem;
36 unsigned short numdat;
37 unsigned short numoth;
38 unsigned short numoth_rcv;
39 unsigned short numdat_rcv;
40 unsigned short ackxmt_dat;
41 unsigned short ackxmt_oth;
42 unsigned short ackrcv_dat;
43 unsigned short ackrcv_oth;
44 unsigned char flowrem_sw;
45 unsigned char flowloc_sw;
46 #define DN_SEND 2
47 #define DN_DONTSEND 1
48 #define DN_NOCHANGE 0
49 unsigned short flowrem_dat;
50 unsigned short flowrem_oth;
51 unsigned short flowloc_dat;
52 unsigned short flowloc_oth;
53 unsigned char services_rem;
54 unsigned char services_loc;
55 unsigned char info_rem;
56 unsigned char info_loc;
57
58 unsigned short segsize_rem;
59 unsigned short segsize_loc;
60
61 unsigned char nonagle;
62 unsigned char multi_ireq;
63 unsigned char accept_mode;
64 unsigned long seg_total; /* Running total of current segment */
65
66 struct optdata_dn conndata_in;
67 struct optdata_dn conndata_out;
68 struct optdata_dn discdata_in;
69 struct optdata_dn discdata_out;
70 struct accessdata_dn accessdata;
71
72 struct sockaddr_dn addr; /* Local address */
73 struct sockaddr_dn peer; /* Remote address */
74
75 /*
76 * In this case the RTT estimation is not specified in the
77 * docs, nor is any back off algorithm. Here we follow well
78 * known tcp algorithms with a few small variations.
79 *
80 * snd_window: Max number of packets we send before we wait for
81 * an ack to come back. This will become part of a
82 * more complicated scheme when we support flow
83 * control.
84 *
85 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
86 * average.
87 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
88 * varience of the smoothed average (but calculated in
89 * a simpler way than for normal statistical varience
90 * calculations).
91 *
92 * nsp_rxtshift: Backoff counter. Value is zero normally, each time
93 * a packet is lost is increases by one until an ack
94 * is received. Its used to index an array of backoff
95 * multipliers.
96 */
97 #define NSP_MIN_WINDOW 1
98 #define NSP_MAX_WINDOW (0x07fe)
99 unsigned long max_window;
100 unsigned long snd_window;
101 #define NSP_INITIAL_SRTT (HZ)
102 unsigned long nsp_srtt;
103 #define NSP_INITIAL_RTTVAR (HZ*3)
104 unsigned long nsp_rttvar;
105 #define NSP_MAXRXTSHIFT 12
106 unsigned long nsp_rxtshift;
107
108 /*
109 * Output queues, one for data, one for otherdata/linkservice
110 */
111 struct sk_buff_head data_xmit_queue;
112 struct sk_buff_head other_xmit_queue;
113
114 /*
115 * Input queue for other data
116 */
117 struct sk_buff_head other_receive_queue;
118 int other_report;
119
120 /*
121 * Stuff to do with the slow timer
122 */
123 unsigned long stamp; /* time of last transmit */
124 unsigned long persist;
125 int (*persist_fxn)(struct sock *sk);
126 unsigned long keepalive;
127 void (*keepalive_fxn)(struct sock *sk);
128
129 /*
130 * This stuff is for the fast timer for delayed acks
131 */
132 struct timer_list delack_timer;
133 int delack_pending;
134 void (*delack_fxn)(struct sock *sk);
135
136 };
137
138 /*
139 * src,dst : Source and Destination DECnet addresses
140 * hops : Number of hops through the network
141 * dst_port, src_port : NSP port numbers
142 * services, info : Useful data extracted from conninit messages
143 * rt_flags : Routing flags byte
144 * nsp_flags : NSP layer flags byte
145 * segsize : Size of segment
146 * segnum : Number, for data, otherdata and linkservice
147 * xmit_count : Number of times we've transmitted this skb
148 * stamp : Time stamp of most recent transmission, used in RTT calculations
149 * iif: Input interface number
150 *
151 * As a general policy, this structure keeps all addresses in network
152 * byte order, and all else in host byte order. Thus dst, src, dst_port
153 * and src_port are in network order. All else is in host order.
154 *
155 */
156 #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
157 struct dn_skb_cb {
158 unsigned short dst;
159 unsigned short src;
160 unsigned short hops;
161 unsigned short dst_port;
162 unsigned short src_port;
163 unsigned char services;
164 unsigned char info;
165 unsigned char rt_flags;
166 unsigned char nsp_flags;
167 unsigned short segsize;
168 unsigned short segnum;
169 unsigned short xmit_count;
170 unsigned long stamp;
171 int iif;
172 };
173
dn_eth2dn(unsigned char * ethaddr)174 static __inline__ dn_address dn_eth2dn(unsigned char *ethaddr)
175 {
176 return ethaddr[4] | (ethaddr[5] << 8);
177 }
178
dn_saddr2dn(struct sockaddr_dn * saddr)179 static __inline__ dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
180 {
181 return *(dn_address *)saddr->sdn_nodeaddr;
182 }
183
dn_dn2eth(unsigned char * ethaddr,dn_address addr)184 static __inline__ void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
185 {
186 ethaddr[0] = 0xAA;
187 ethaddr[1] = 0x00;
188 ethaddr[2] = 0x04;
189 ethaddr[3] = 0x00;
190 ethaddr[4] = (unsigned char)(addr & 0xff);
191 ethaddr[5] = (unsigned char)(addr >> 8);
192 }
193
194 #define DN_MENUVER_ACC 0x01
195 #define DN_MENUVER_USR 0x02
196 #define DN_MENUVER_PRX 0x04
197 #define DN_MENUVER_UIC 0x08
198
199 extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
200 extern struct sock *dn_find_by_skb(struct sk_buff *skb);
201 #define DN_ASCBUF_LEN 9
202 extern char *dn_addr2asc(dn_address, char *);
203 extern int dn_destroy_timer(struct sock *sk);
204
205 extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
206 extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
207
208 extern void dn_start_slow_timer(struct sock *sk);
209 extern void dn_stop_slow_timer(struct sock *sk);
210 extern void dn_start_fast_timer(struct sock *sk);
211 extern void dn_stop_fast_timer(struct sock *sk);
212
213 extern dn_address decnet_address;
214 extern unsigned char decnet_ether_address[6];
215 extern int decnet_debug_level;
216 extern int decnet_time_wait;
217 extern int decnet_dn_count;
218 extern int decnet_di_count;
219 extern int decnet_dr_count;
220 extern int decnet_no_fc_max_cwnd;
221
222 #endif /* _NET_DN_H */
223