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1#ifndef _NET_DN_H
2#define _NET_DN_H
3
4#include <linux/dn.h>
5#include <net/sock.h>
6#include <asm/byteorder.h>
7#include <asm/unaligned.h>
8
9struct dn_scp /* Session Control Port */
10{
11 unsigned char state;
12#define DN_O 1 /* Open */
13#define DN_CR 2 /* Connect Receive */
14#define DN_DR 3 /* Disconnect Reject */
15#define DN_DRC 4 /* Discon. Rej. Complete*/
16#define DN_CC 5 /* Connect Confirm */
17#define DN_CI 6 /* Connect Initiate */
18#define DN_NR 7 /* No resources */
19#define DN_NC 8 /* No communication */
20#define DN_CD 9 /* Connect Delivery */
21#define DN_RJ 10 /* Rejected */
22#define DN_RUN 11 /* Running */
23#define DN_DI 12 /* Disconnect Initiate */
24#define DN_DIC 13 /* Disconnect Complete */
25#define DN_DN 14 /* Disconnect Notificat */
26#define DN_CL 15 /* Closed */
27#define DN_CN 16 /* Closed Notification */
28
29 __le16 addrloc;
30 __le16 addrrem;
31 __u16 numdat;
32 __u16 numoth;
33 __u16 numoth_rcv;
34 __u16 numdat_rcv;
35 __u16 ackxmt_dat;
36 __u16 ackxmt_oth;
37 __u16 ackrcv_dat;
38 __u16 ackrcv_oth;
39 __u8 flowrem_sw;
40 __u8 flowloc_sw;
41#define DN_SEND 2
42#define DN_DONTSEND 1
43#define DN_NOCHANGE 0
44 __u16 flowrem_dat;
45 __u16 flowrem_oth;
46 __u16 flowloc_dat;
47 __u16 flowloc_oth;
48 __u8 services_rem;
49 __u8 services_loc;
50 __u8 info_rem;
51 __u8 info_loc;
52
53 __u16 segsize_rem;
54 __u16 segsize_loc;
55
56 __u8 nonagle;
57 __u8 multi_ireq;
58 __u8 accept_mode;
59 unsigned long seg_total; /* Running total of current segment */
60
61 struct optdata_dn conndata_in;
62 struct optdata_dn conndata_out;
63 struct optdata_dn discdata_in;
64 struct optdata_dn discdata_out;
65 struct accessdata_dn accessdata;
66
67 struct sockaddr_dn addr; /* Local address */
68 struct sockaddr_dn peer; /* Remote address */
69
70 /*
71 * In this case the RTT estimation is not specified in the
72 * docs, nor is any back off algorithm. Here we follow well
73 * known tcp algorithms with a few small variations.
74 *
75 * snd_window: Max number of packets we send before we wait for
76 * an ack to come back. This will become part of a
77 * more complicated scheme when we support flow
78 * control.
79 *
80 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
81 * average.
82 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
83 * varience of the smoothed average (but calculated in
84 * a simpler way than for normal statistical varience
85 * calculations).
86 *
87 * nsp_rxtshift: Backoff counter. Value is zero normally, each time
88 * a packet is lost is increases by one until an ack
89 * is received. Its used to index an array of backoff
90 * multipliers.
91 */
92#define NSP_MIN_WINDOW 1
93#define NSP_MAX_WINDOW (0x07fe)
94 unsigned long max_window;
95 unsigned long snd_window;
96#define NSP_INITIAL_SRTT (HZ)
97 unsigned long nsp_srtt;
98#define NSP_INITIAL_RTTVAR (HZ*3)
99 unsigned long nsp_rttvar;
100#define NSP_MAXRXTSHIFT 12
101 unsigned long nsp_rxtshift;
102
103 /*
104 * Output queues, one for data, one for otherdata/linkservice
105 */
106 struct sk_buff_head data_xmit_queue;
107 struct sk_buff_head other_xmit_queue;
108
109 /*
110 * Input queue for other data
111 */
112 struct sk_buff_head other_receive_queue;
113 int other_report;
114
115 /*
116 * Stuff to do with the slow timer
117 */
118 unsigned long stamp; /* time of last transmit */
119 unsigned long persist;
120 int (*persist_fxn)(struct sock *sk);
121 unsigned long keepalive;
122 void (*keepalive_fxn)(struct sock *sk);
123
124 /*
125 * This stuff is for the fast timer for delayed acks
126 */
127 struct timer_list delack_timer;
128 int delack_pending;
129 void (*delack_fxn)(struct sock *sk);
130
131};
132
133static inline struct dn_scp *DN_SK(struct sock *sk)
134{
135 return (struct dn_scp *)(sk + 1);
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)
157struct dn_skb_cb {
158 __le16 dst;
159 __le16 src;
160 __u16 hops;
161 __le16 dst_port;
162 __le16 src_port;
163 __u8 services;
164 __u8 info;
165 __u8 rt_flags;
166 __u8 nsp_flags;
167 __u16 segsize;
168 __u16 segnum;
169 __u16 xmit_count;
170 unsigned long stamp;
171 int iif;
172};
173
174static inline __le16 dn_eth2dn(unsigned char *ethaddr)
175{
176 return get_unaligned((__le16 *)(ethaddr + 4));
177}
178
179static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
180{
181 return *(__le16 *)saddr->sdn_nodeaddr;
182}
183
184static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
185{
186 __u16 a = le16_to_cpu(addr);
187 ethaddr[0] = 0xAA;
188 ethaddr[1] = 0x00;
189 ethaddr[2] = 0x04;
190 ethaddr[3] = 0x00;
191 ethaddr[4] = (__u8)(a & 0xff);
192 ethaddr[5] = (__u8)(a >> 8);
193}
194
195static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp)
196{
197 fld->fld_sport = scp->addrloc;
198 fld->fld_dport = scp->addrrem;
199}
200
201extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
202
203#define DN_MENUVER_ACC 0x01
204#define DN_MENUVER_USR 0x02
205#define DN_MENUVER_PRX 0x04
206#define DN_MENUVER_UIC 0x08
207
208extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
209extern struct sock *dn_find_by_skb(struct sk_buff *skb);
210#define DN_ASCBUF_LEN 9
211extern char *dn_addr2asc(__u16, char *);
212extern int dn_destroy_timer(struct sock *sk);
213
214extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
215extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
216
217extern void dn_start_slow_timer(struct sock *sk);
218extern void dn_stop_slow_timer(struct sock *sk);
219
220extern __le16 decnet_address;
221extern int decnet_debug_level;
222extern int decnet_time_wait;
223extern int decnet_dn_count;
224extern int decnet_di_count;
225extern int decnet_dr_count;
226extern int decnet_no_fc_max_cwnd;
227
228extern long sysctl_decnet_mem[3];
229extern int sysctl_decnet_wmem[3];
230extern int sysctl_decnet_rmem[3];
231
232#endif /* _NET_DN_H */