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[deliverable/linux.git] / include / net / dn.h
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1da177e4
LT		 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
8typedef unsigned short dn_address;
9
10#define dn_ntohs(x) le16_to_cpu((unsigned short)(x))
11#define dn_htons(x) cpu_to_le16((unsigned short)(x))
12
13struct dn_scp /* Session Control Port */
14{
15 unsigned char state;
16#define DN_O 1 /* Open */
17#define DN_CR 2 /* Connect Receive */
18#define DN_DR 3 /* Disconnect Reject */
19#define DN_DRC 4 /* Discon. Rej. Complete*/
20#define DN_CC 5 /* Connect Confirm */
21#define DN_CI 6 /* Connect Initiate */
22#define DN_NR 7 /* No resources */
23#define DN_NC 8 /* No communication */
24#define DN_CD 9 /* Connect Delivery */
25#define DN_RJ 10 /* Rejected */
26#define DN_RUN 11 /* Running */
27#define DN_DI 12 /* Disconnect Initiate */
28#define DN_DIC 13 /* Disconnect Complete */
29#define DN_DN 14 /* Disconnect Notificat */
30#define DN_CL 15 /* Closed */
31#define DN_CN 16 /* Closed Notification */
32
33 unsigned short addrloc;
34 unsigned short addrrem;
35 unsigned short numdat;
36 unsigned short numoth;
37 unsigned short numoth_rcv;
38 unsigned short numdat_rcv;
39 unsigned short ackxmt_dat;
40 unsigned short ackxmt_oth;
41 unsigned short ackrcv_dat;
42 unsigned short ackrcv_oth;
43 unsigned char flowrem_sw;
44 unsigned char flowloc_sw;
45#define DN_SEND 2
46#define DN_DONTSEND 1
47#define DN_NOCHANGE 0
48 unsigned short flowrem_dat;
49 unsigned short flowrem_oth;
50 unsigned short flowloc_dat;
51 unsigned short flowloc_oth;
52 unsigned char services_rem;
53 unsigned char services_loc;
54 unsigned char info_rem;
55 unsigned char info_loc;
56
57 unsigned short segsize_rem;
58 unsigned short segsize_loc;
59
60 unsigned char nonagle;
61 unsigned char multi_ireq;
62 unsigned char accept_mode;
63 unsigned long seg_total; /* Running total of current segment */
64
65 struct optdata_dn conndata_in;
66 struct optdata_dn conndata_out;
67 struct optdata_dn discdata_in;
68 struct optdata_dn discdata_out;
69 struct accessdata_dn accessdata;
70
71 struct sockaddr_dn addr; /* Local address */
72 struct sockaddr_dn peer; /* Remote address */
73
74 /*
75 * In this case the RTT estimation is not specified in the
76 * docs, nor is any back off algorithm. Here we follow well
77 * known tcp algorithms with a few small variations.
78 *
79 * snd_window: Max number of packets we send before we wait for
80 * an ack to come back. This will become part of a
81 * more complicated scheme when we support flow
82 * control.
83 *
84 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
85 * average.
86 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
87 * varience of the smoothed average (but calculated in
88 * a simpler way than for normal statistical varience
89 * calculations).
90 *
91 * nsp_rxtshift: Backoff counter. Value is zero normally, each time
92 * a packet is lost is increases by one until an ack
93 * is received. Its used to index an array of backoff
94 * multipliers.
95 */
96#define NSP_MIN_WINDOW 1
97#define NSP_MAX_WINDOW (0x07fe)
98 unsigned long max_window;
99 unsigned long snd_window;
100#define NSP_INITIAL_SRTT (HZ)
101 unsigned long nsp_srtt;
102#define NSP_INITIAL_RTTVAR (HZ*3)
103 unsigned long nsp_rttvar;
104#define NSP_MAXRXTSHIFT 12
105 unsigned long nsp_rxtshift;
106
107 /*
108 * Output queues, one for data, one for otherdata/linkservice
109 */
110 struct sk_buff_head data_xmit_queue;
111 struct sk_buff_head other_xmit_queue;
112
113 /*
114 * Input queue for other data
115 */
116 struct sk_buff_head other_receive_queue;
117 int other_report;
118
119 /*
120 * Stuff to do with the slow timer
121 */
122 unsigned long stamp; /* time of last transmit */
123 unsigned long persist;
124 int (*persist_fxn)(struct sock *sk);
125 unsigned long keepalive;
126 void (*keepalive_fxn)(struct sock *sk);
127
128 /*
129 * This stuff is for the fast timer for delayed acks
130 */
131 struct timer_list delack_timer;
132 int delack_pending;
133 void (*delack_fxn)(struct sock *sk);
134
135};
136
137static inline struct dn_scp *DN_SK(struct sock *sk)
138{
139 return (struct dn_scp *)(sk + 1);
140}
141
142/*
143 * src,dst : Source and Destination DECnet addresses
144 * hops : Number of hops through the network
145 * dst_port, src_port : NSP port numbers
146 * services, info : Useful data extracted from conninit messages
147 * rt_flags : Routing flags byte
148 * nsp_flags : NSP layer flags byte
149 * segsize : Size of segment
150 * segnum : Number, for data, otherdata and linkservice
151 * xmit_count : Number of times we've transmitted this skb
152 * stamp : Time stamp of most recent transmission, used in RTT calculations
153 * iif: Input interface number
154 *
155 * As a general policy, this structure keeps all addresses in network
156 * byte order, and all else in host byte order. Thus dst, src, dst_port
157 * and src_port are in network order. All else is in host order.
158 *
159 */
160#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
161struct dn_skb_cb {
162 unsigned short dst;
163 unsigned short src;
164 unsigned short hops;
165 unsigned short dst_port;
166 unsigned short src_port;
167 unsigned char services;
168 unsigned char info;
169 unsigned char rt_flags;
170 unsigned char nsp_flags;
171 unsigned short segsize;
172 unsigned short segnum;
173 unsigned short xmit_count;
174 unsigned long stamp;
175 int iif;
176};
177
178static inline dn_address dn_eth2dn(unsigned char *ethaddr)
179{
180 return ethaddr[4] | (ethaddr[5] << 8);
181}
182
183static inline dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
184{
185 return *(dn_address *)saddr->sdn_nodeaddr;
186}
187
188static inline void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
189{
190 ethaddr[0] = 0xAA;
191 ethaddr[1] = 0x00;
192 ethaddr[2] = 0x04;
193 ethaddr[3] = 0x00;
194 ethaddr[4] = (unsigned char)(addr & 0xff);
195 ethaddr[5] = (unsigned char)(addr >> 8);
196}
197
198static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
199{
200 fl->uli_u.dnports.sport = scp->addrloc;
201 fl->uli_u.dnports.dport = scp->addrrem;
202 fl->uli_u.dnports.objnum = scp->addr.sdn_objnum;
203 if (fl->uli_u.dnports.objnum == 0) {
204 fl->uli_u.dnports.objnamel = scp->addr.sdn_objnamel;
205 memcpy(fl->uli_u.dnports.objname, scp->addr.sdn_objname, 16);
206 }
207}
208
209extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
210
211#define DN_MENUVER_ACC 0x01
212#define DN_MENUVER_USR 0x02
213#define DN_MENUVER_PRX 0x04
214#define DN_MENUVER_UIC 0x08
215
216extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
217extern struct sock *dn_find_by_skb(struct sk_buff *skb);
218#define DN_ASCBUF_LEN 9
219extern char *dn_addr2asc(dn_address, char *);
220extern int dn_destroy_timer(struct sock *sk);
221
222extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
223extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
224
225extern void dn_start_slow_timer(struct sock *sk);
226extern void dn_stop_slow_timer(struct sock *sk);
227
228extern dn_address decnet_address;
229extern int decnet_debug_level;
230extern int decnet_time_wait;
231extern int decnet_dn_count;
232extern int decnet_di_count;
233extern int decnet_dr_count;
234extern int decnet_no_fc_max_cwnd;
235
236#endif /* _NET_DN_H */
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