Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _NET_DN_H
2#define _NET_DN_H
3
4#include <linux/dn.h>
5#include <net/sock.h>
6#include <net/tcp.h>
7#include <asm/byteorder.h>
8
9typedef unsigned short dn_address;
10
11#define dn_ntohs(x) le16_to_cpu((unsigned short)(x))
12#define dn_htons(x) cpu_to_le16((unsigned short)(x))
13
14struct 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
138static inline struct dn_scp *DN_SK(struct sock *sk)
139{
140 return (struct dn_scp *)(sk + 1);
141}
142
143/*
144 * src,dst : Source and Destination DECnet addresses
145 * hops : Number of hops through the network
146 * dst_port, src_port : NSP port numbers
147 * services, info : Useful data extracted from conninit messages
148 * rt_flags : Routing flags byte
149 * nsp_flags : NSP layer flags byte
150 * segsize : Size of segment
151 * segnum : Number, for data, otherdata and linkservice
152 * xmit_count : Number of times we've transmitted this skb
153 * stamp : Time stamp of most recent transmission, used in RTT calculations
154 * iif: Input interface number
155 *
156 * As a general policy, this structure keeps all addresses in network
157 * byte order, and all else in host byte order. Thus dst, src, dst_port
158 * and src_port are in network order. All else is in host order.
159 *
160 */
161#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
162struct dn_skb_cb {
163 unsigned short dst;
164 unsigned short src;
165 unsigned short hops;
166 unsigned short dst_port;
167 unsigned short src_port;
168 unsigned char services;
169 unsigned char info;
170 unsigned char rt_flags;
171 unsigned char nsp_flags;
172 unsigned short segsize;
173 unsigned short segnum;
174 unsigned short xmit_count;
175 unsigned long stamp;
176 int iif;
177};
178
179static inline dn_address dn_eth2dn(unsigned char *ethaddr)
180{
181 return ethaddr[4] | (ethaddr[5] << 8);
182}
183
184static inline dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
185{
186 return *(dn_address *)saddr->sdn_nodeaddr;
187}
188
189static inline void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
190{
191 ethaddr[0] = 0xAA;
192 ethaddr[1] = 0x00;
193 ethaddr[2] = 0x04;
194 ethaddr[3] = 0x00;
195 ethaddr[4] = (unsigned char)(addr & 0xff);
196 ethaddr[5] = (unsigned char)(addr >> 8);
197}
198
199static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
200{
201 fl->uli_u.dnports.sport = scp->addrloc;
202 fl->uli_u.dnports.dport = scp->addrrem;
203 fl->uli_u.dnports.objnum = scp->addr.sdn_objnum;
204 if (fl->uli_u.dnports.objnum == 0) {
205 fl->uli_u.dnports.objnamel = scp->addr.sdn_objnamel;
206 memcpy(fl->uli_u.dnports.objname, scp->addr.sdn_objname, 16);
207 }
208}
209
210extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
211
212#define DN_MENUVER_ACC 0x01
213#define DN_MENUVER_USR 0x02
214#define DN_MENUVER_PRX 0x04
215#define DN_MENUVER_UIC 0x08
216
217extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
218extern struct sock *dn_find_by_skb(struct sk_buff *skb);
219#define DN_ASCBUF_LEN 9
220extern char *dn_addr2asc(dn_address, char *);
221extern int dn_destroy_timer(struct sock *sk);
222
223extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
224extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
225
226extern void dn_start_slow_timer(struct sock *sk);
227extern void dn_stop_slow_timer(struct sock *sk);
228
229extern dn_address decnet_address;
230extern int decnet_debug_level;
231extern int decnet_time_wait;
232extern int decnet_dn_count;
233extern int decnet_di_count;
234extern int decnet_dr_count;
235extern int decnet_no_fc_max_cwnd;
236
237extern int sysctl_decnet_mem[3];
238extern int sysctl_decnet_wmem[3];
239extern int sysctl_decnet_rmem[3];
240
241#endif /* _NET_DN_H */