1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
#ifndef _NET_DN_H
#define _NET_DN_H
#include <linux/dn.h>
#include <net/sock.h>
#include <net/flow.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
struct dn_scp /* Session Control Port */
{
unsigned char state;
#define DN_O 1 /* Open */
#define DN_CR 2 /* Connect Receive */
#define DN_DR 3 /* Disconnect Reject */
#define DN_DRC 4 /* Discon. Rej. Complete*/
#define DN_CC 5 /* Connect Confirm */
#define DN_CI 6 /* Connect Initiate */
#define DN_NR 7 /* No resources */
#define DN_NC 8 /* No communication */
#define DN_CD 9 /* Connect Delivery */
#define DN_RJ 10 /* Rejected */
#define DN_RUN 11 /* Running */
#define DN_DI 12 /* Disconnect Initiate */
#define DN_DIC 13 /* Disconnect Complete */
#define DN_DN 14 /* Disconnect Notificat */
#define DN_CL 15 /* Closed */
#define DN_CN 16 /* Closed Notification */
__le16 addrloc;
__le16 addrrem;
__u16 numdat;
__u16 numoth;
__u16 numoth_rcv;
__u16 numdat_rcv;
__u16 ackxmt_dat;
__u16 ackxmt_oth;
__u16 ackrcv_dat;
__u16 ackrcv_oth;
__u8 flowrem_sw;
__u8 flowloc_sw;
#define DN_SEND 2
#define DN_DONTSEND 1
#define DN_NOCHANGE 0
__u16 flowrem_dat;
__u16 flowrem_oth;
__u16 flowloc_dat;
__u16 flowloc_oth;
__u8 services_rem;
__u8 services_loc;
__u8 info_rem;
__u8 info_loc;
__u16 segsize_rem;
__u16 segsize_loc;
__u8 nonagle;
__u8 multi_ireq;
__u8 accept_mode;
unsigned long seg_total; /* Running total of current segment */
struct optdata_dn conndata_in;
struct optdata_dn conndata_out;
struct optdata_dn discdata_in;
struct optdata_dn discdata_out;
struct accessdata_dn accessdata;
struct sockaddr_dn addr; /* Local address */
struct sockaddr_dn peer; /* Remote address */
/*
* In this case the RTT estimation is not specified in the
* docs, nor is any back off algorithm. Here we follow well
* known tcp algorithms with a few small variations.
*
* snd_window: Max number of packets we send before we wait for
* an ack to come back. This will become part of a
* more complicated scheme when we support flow
* control.
*
* nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
* average.
* nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
* varience of the smoothed average (but calculated in
* a simpler way than for normal statistical varience
* calculations).
*
* nsp_rxtshift: Backoff counter. Value is zero normally, each time
* a packet is lost is increases by one until an ack
* is received. Its used to index an array of backoff
* multipliers.
*/
#define NSP_MIN_WINDOW 1
#define NSP_MAX_WINDOW (0x07fe)
unsigned long max_window;
unsigned long snd_window;
#define NSP_INITIAL_SRTT (HZ)
unsigned long nsp_srtt;
#define NSP_INITIAL_RTTVAR (HZ*3)
unsigned long nsp_rttvar;
#define NSP_MAXRXTSHIFT 12
unsigned long nsp_rxtshift;
/*
* Output queues, one for data, one for otherdata/linkservice
*/
struct sk_buff_head data_xmit_queue;
struct sk_buff_head other_xmit_queue;
/*
* Input queue for other data
*/
struct sk_buff_head other_receive_queue;
int other_report;
/*
* Stuff to do with the slow timer
*/
unsigned long stamp; /* time of last transmit */
unsigned long persist;
int (*persist_fxn)(struct sock *sk);
unsigned long keepalive;
void (*keepalive_fxn)(struct sock *sk);
/*
* This stuff is for the fast timer for delayed acks
*/
struct timer_list delack_timer;
int delack_pending;
void (*delack_fxn)(struct sock *sk);
};
static inline struct dn_scp *DN_SK(struct sock *sk)
{
return (struct dn_scp *)(sk + 1);
}
/*
* src,dst : Source and Destination DECnet addresses
* hops : Number of hops through the network
* dst_port, src_port : NSP port numbers
* services, info : Useful data extracted from conninit messages
* rt_flags : Routing flags byte
* nsp_flags : NSP layer flags byte
* segsize : Size of segment
* segnum : Number, for data, otherdata and linkservice
* xmit_count : Number of times we've transmitted this skb
* stamp : Time stamp of most recent transmission, used in RTT calculations
* iif: Input interface number
*
* As a general policy, this structure keeps all addresses in network
* byte order, and all else in host byte order. Thus dst, src, dst_port
* and src_port are in network order. All else is in host order.
*
*/
#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
struct dn_skb_cb {
__le16 dst;
__le16 src;
__u16 hops;
__le16 dst_port;
__le16 src_port;
__u8 services;
__u8 info;
__u8 rt_flags;
__u8 nsp_flags;
__u16 segsize;
__u16 segnum;
__u16 xmit_count;
unsigned long stamp;
int iif;
};
static inline __le16 dn_eth2dn(unsigned char *ethaddr)
{
return get_unaligned((__le16 *)(ethaddr + 4));
}
static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
{
return *(__le16 *)saddr->sdn_nodeaddr;
}
static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
{
__u16 a = le16_to_cpu(addr);
ethaddr[0] = 0xAA;
ethaddr[1] = 0x00;
ethaddr[2] = 0x04;
ethaddr[3] = 0x00;
ethaddr[4] = (__u8)(a & 0xff);
ethaddr[5] = (__u8)(a >> 8);
}
static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp)
{
fld->fld_sport = scp->addrloc;
fld->fld_dport = scp->addrrem;
}
unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu);
void dn_register_sysctl(void);
void dn_unregister_sysctl(void);
#define DN_MENUVER_ACC 0x01
#define DN_MENUVER_USR 0x02
#define DN_MENUVER_PRX 0x04
#define DN_MENUVER_UIC 0x08
struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
struct sock *dn_find_by_skb(struct sk_buff *skb);
#define DN_ASCBUF_LEN 9
char *dn_addr2asc(__u16, char *);
int dn_destroy_timer(struct sock *sk);
int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf,
unsigned char type);
int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr,
unsigned char *type);
void dn_start_slow_timer(struct sock *sk);
void dn_stop_slow_timer(struct sock *sk);
extern __le16 decnet_address;
extern int decnet_debug_level;
extern int decnet_time_wait;
extern int decnet_dn_count;
extern int decnet_di_count;
extern int decnet_dr_count;
extern int decnet_no_fc_max_cwnd;
extern long sysctl_decnet_mem[3];
extern int sysctl_decnet_wmem[3];
extern int sysctl_decnet_rmem[3];
#endif /* _NET_DN_H */
|
