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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> | |
475ad8e2 | 7 | #include <asm/unaligned.h> |
1da177e4 LT |
8 | |
9 | struct 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 | ||
c4ea94ab SW |
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; | |
1da177e4 LT |
41 | #define DN_SEND 2 |
42 | #define DN_DONTSEND 1 | |
43 | #define DN_NOCHANGE 0 | |
c4ea94ab SW |
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; | |
1da177e4 LT |
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 | ||
133 | static 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) | |
157 | struct dn_skb_cb { | |
c4ea94ab SW |
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; | |
1da177e4 LT |
170 | unsigned long stamp; |
171 | int iif; | |
172 | }; | |
173 | ||
c4ea94ab | 174 | static inline __le16 dn_eth2dn(unsigned char *ethaddr) |
1da177e4 | 175 | { |
c4106aa8 | 176 | return get_unaligned((__le16 *)(ethaddr + 4)); |
1da177e4 LT |
177 | } |
178 | ||
c4ea94ab | 179 | static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) |
1da177e4 | 180 | { |
c4ea94ab | 181 | return *(__le16 *)saddr->sdn_nodeaddr; |
1da177e4 LT |
182 | } |
183 | ||
c4ea94ab | 184 | static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) |
1da177e4 | 185 | { |
c4106aa8 | 186 | __u16 a = le16_to_cpu(addr); |
1da177e4 LT |
187 | ethaddr[0] = 0xAA; |
188 | ethaddr[1] = 0x00; | |
189 | ethaddr[2] = 0x04; | |
190 | ethaddr[3] = 0x00; | |
c4ea94ab SW |
191 | ethaddr[4] = (__u8)(a & 0xff); |
192 | ethaddr[5] = (__u8)(a >> 8); | |
1da177e4 LT |
193 | } |
194 | ||
195 | static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp) | |
196 | { | |
197 | fl->uli_u.dnports.sport = scp->addrloc; | |
198 | fl->uli_u.dnports.dport = scp->addrrem; | |
1da177e4 LT |
199 | } |
200 | ||
201 | extern 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 | ||
208 | extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); | |
209 | extern struct sock *dn_find_by_skb(struct sk_buff *skb); | |
210 | #define DN_ASCBUF_LEN 9 | |
c4ea94ab | 211 | extern char *dn_addr2asc(__u16, char *); |
1da177e4 LT |
212 | extern int dn_destroy_timer(struct sock *sk); |
213 | ||
214 | extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type); | |
215 | extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type); | |
216 | ||
217 | extern void dn_start_slow_timer(struct sock *sk); | |
218 | extern void dn_stop_slow_timer(struct sock *sk); | |
219 | ||
c4ea94ab | 220 | extern __le16 decnet_address; |
1da177e4 LT |
221 | extern int decnet_debug_level; |
222 | extern int decnet_time_wait; | |
223 | extern int decnet_dn_count; | |
224 | extern int decnet_di_count; | |
225 | extern int decnet_dr_count; | |
226 | extern int decnet_no_fc_max_cwnd; | |
227 | ||
1f12bcc9 SW |
228 | extern int sysctl_decnet_mem[3]; |
229 | extern int sysctl_decnet_wmem[3]; | |
230 | extern int sysctl_decnet_rmem[3]; | |
231 | ||
1da177e4 | 232 | #endif /* _NET_DN_H */ |