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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 | ||
c4ea94ab SW |
8 | #define dn_ntohs(x) le16_to_cpu(x) |
9 | #define dn_htons(x) cpu_to_le16(x) | |
1da177e4 LT |
10 | |
11 | struct dn_scp /* Session Control Port */ | |
12 | { | |
13 | unsigned char state; | |
14 | #define DN_O 1 /* Open */ | |
15 | #define DN_CR 2 /* Connect Receive */ | |
16 | #define DN_DR 3 /* Disconnect Reject */ | |
17 | #define DN_DRC 4 /* Discon. Rej. Complete*/ | |
18 | #define DN_CC 5 /* Connect Confirm */ | |
19 | #define DN_CI 6 /* Connect Initiate */ | |
20 | #define DN_NR 7 /* No resources */ | |
21 | #define DN_NC 8 /* No communication */ | |
22 | #define DN_CD 9 /* Connect Delivery */ | |
23 | #define DN_RJ 10 /* Rejected */ | |
24 | #define DN_RUN 11 /* Running */ | |
25 | #define DN_DI 12 /* Disconnect Initiate */ | |
26 | #define DN_DIC 13 /* Disconnect Complete */ | |
27 | #define DN_DN 14 /* Disconnect Notificat */ | |
28 | #define DN_CL 15 /* Closed */ | |
29 | #define DN_CN 16 /* Closed Notification */ | |
30 | ||
c4ea94ab SW |
31 | __le16 addrloc; |
32 | __le16 addrrem; | |
33 | __u16 numdat; | |
34 | __u16 numoth; | |
35 | __u16 numoth_rcv; | |
36 | __u16 numdat_rcv; | |
37 | __u16 ackxmt_dat; | |
38 | __u16 ackxmt_oth; | |
39 | __u16 ackrcv_dat; | |
40 | __u16 ackrcv_oth; | |
41 | __u8 flowrem_sw; | |
42 | __u8 flowloc_sw; | |
1da177e4 LT |
43 | #define DN_SEND 2 |
44 | #define DN_DONTSEND 1 | |
45 | #define DN_NOCHANGE 0 | |
c4ea94ab SW |
46 | __u16 flowrem_dat; |
47 | __u16 flowrem_oth; | |
48 | __u16 flowloc_dat; | |
49 | __u16 flowloc_oth; | |
50 | __u8 services_rem; | |
51 | __u8 services_loc; | |
52 | __u8 info_rem; | |
53 | __u8 info_loc; | |
54 | ||
55 | __u16 segsize_rem; | |
56 | __u16 segsize_loc; | |
57 | ||
58 | __u8 nonagle; | |
59 | __u8 multi_ireq; | |
60 | __u8 accept_mode; | |
1da177e4 LT |
61 | unsigned long seg_total; /* Running total of current segment */ |
62 | ||
63 | struct optdata_dn conndata_in; | |
64 | struct optdata_dn conndata_out; | |
65 | struct optdata_dn discdata_in; | |
66 | struct optdata_dn discdata_out; | |
67 | struct accessdata_dn accessdata; | |
68 | ||
69 | struct sockaddr_dn addr; /* Local address */ | |
70 | struct sockaddr_dn peer; /* Remote address */ | |
71 | ||
72 | /* | |
73 | * In this case the RTT estimation is not specified in the | |
74 | * docs, nor is any back off algorithm. Here we follow well | |
75 | * known tcp algorithms with a few small variations. | |
76 | * | |
77 | * snd_window: Max number of packets we send before we wait for | |
78 | * an ack to come back. This will become part of a | |
79 | * more complicated scheme when we support flow | |
80 | * control. | |
81 | * | |
82 | * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling | |
83 | * average. | |
84 | * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the | |
85 | * varience of the smoothed average (but calculated in | |
86 | * a simpler way than for normal statistical varience | |
87 | * calculations). | |
88 | * | |
89 | * nsp_rxtshift: Backoff counter. Value is zero normally, each time | |
90 | * a packet is lost is increases by one until an ack | |
91 | * is received. Its used to index an array of backoff | |
92 | * multipliers. | |
93 | */ | |
94 | #define NSP_MIN_WINDOW 1 | |
95 | #define NSP_MAX_WINDOW (0x07fe) | |
96 | unsigned long max_window; | |
97 | unsigned long snd_window; | |
98 | #define NSP_INITIAL_SRTT (HZ) | |
99 | unsigned long nsp_srtt; | |
100 | #define NSP_INITIAL_RTTVAR (HZ*3) | |
101 | unsigned long nsp_rttvar; | |
102 | #define NSP_MAXRXTSHIFT 12 | |
103 | unsigned long nsp_rxtshift; | |
104 | ||
105 | /* | |
106 | * Output queues, one for data, one for otherdata/linkservice | |
107 | */ | |
108 | struct sk_buff_head data_xmit_queue; | |
109 | struct sk_buff_head other_xmit_queue; | |
110 | ||
111 | /* | |
112 | * Input queue for other data | |
113 | */ | |
114 | struct sk_buff_head other_receive_queue; | |
115 | int other_report; | |
116 | ||
117 | /* | |
118 | * Stuff to do with the slow timer | |
119 | */ | |
120 | unsigned long stamp; /* time of last transmit */ | |
121 | unsigned long persist; | |
122 | int (*persist_fxn)(struct sock *sk); | |
123 | unsigned long keepalive; | |
124 | void (*keepalive_fxn)(struct sock *sk); | |
125 | ||
126 | /* | |
127 | * This stuff is for the fast timer for delayed acks | |
128 | */ | |
129 | struct timer_list delack_timer; | |
130 | int delack_pending; | |
131 | void (*delack_fxn)(struct sock *sk); | |
132 | ||
133 | }; | |
134 | ||
135 | static inline struct dn_scp *DN_SK(struct sock *sk) | |
136 | { | |
137 | return (struct dn_scp *)(sk + 1); | |
138 | } | |
139 | ||
140 | /* | |
141 | * src,dst : Source and Destination DECnet addresses | |
142 | * hops : Number of hops through the network | |
143 | * dst_port, src_port : NSP port numbers | |
144 | * services, info : Useful data extracted from conninit messages | |
145 | * rt_flags : Routing flags byte | |
146 | * nsp_flags : NSP layer flags byte | |
147 | * segsize : Size of segment | |
148 | * segnum : Number, for data, otherdata and linkservice | |
149 | * xmit_count : Number of times we've transmitted this skb | |
150 | * stamp : Time stamp of most recent transmission, used in RTT calculations | |
151 | * iif: Input interface number | |
152 | * | |
153 | * As a general policy, this structure keeps all addresses in network | |
154 | * byte order, and all else in host byte order. Thus dst, src, dst_port | |
155 | * and src_port are in network order. All else is in host order. | |
156 | * | |
157 | */ | |
158 | #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb) | |
159 | struct dn_skb_cb { | |
c4ea94ab SW |
160 | __le16 dst; |
161 | __le16 src; | |
162 | __u16 hops; | |
163 | __le16 dst_port; | |
164 | __le16 src_port; | |
165 | __u8 services; | |
166 | __u8 info; | |
167 | __u8 rt_flags; | |
168 | __u8 nsp_flags; | |
169 | __u16 segsize; | |
170 | __u16 segnum; | |
171 | __u16 xmit_count; | |
1da177e4 LT |
172 | unsigned long stamp; |
173 | int iif; | |
174 | }; | |
175 | ||
c4ea94ab | 176 | static inline __le16 dn_eth2dn(unsigned char *ethaddr) |
1da177e4 | 177 | { |
c4ea94ab | 178 | return dn_htons(ethaddr[4] | (ethaddr[5] << 8)); |
1da177e4 LT |
179 | } |
180 | ||
c4ea94ab | 181 | static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) |
1da177e4 | 182 | { |
c4ea94ab | 183 | return *(__le16 *)saddr->sdn_nodeaddr; |
1da177e4 LT |
184 | } |
185 | ||
c4ea94ab | 186 | static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) |
1da177e4 | 187 | { |
c4ea94ab | 188 | __u16 a = dn_ntohs(addr); |
1da177e4 LT |
189 | ethaddr[0] = 0xAA; |
190 | ethaddr[1] = 0x00; | |
191 | ethaddr[2] = 0x04; | |
192 | ethaddr[3] = 0x00; | |
c4ea94ab SW |
193 | ethaddr[4] = (__u8)(a & 0xff); |
194 | ethaddr[5] = (__u8)(a >> 8); | |
1da177e4 LT |
195 | } |
196 | ||
197 | static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp) | |
198 | { | |
199 | fl->uli_u.dnports.sport = scp->addrloc; | |
200 | fl->uli_u.dnports.dport = scp->addrrem; | |
1da177e4 LT |
201 | } |
202 | ||
203 | extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu); | |
204 | ||
205 | #define DN_MENUVER_ACC 0x01 | |
206 | #define DN_MENUVER_USR 0x02 | |
207 | #define DN_MENUVER_PRX 0x04 | |
208 | #define DN_MENUVER_UIC 0x08 | |
209 | ||
210 | extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); | |
211 | extern struct sock *dn_find_by_skb(struct sk_buff *skb); | |
212 | #define DN_ASCBUF_LEN 9 | |
c4ea94ab | 213 | extern char *dn_addr2asc(__u16, char *); |
1da177e4 LT |
214 | extern int dn_destroy_timer(struct sock *sk); |
215 | ||
216 | extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type); | |
217 | extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type); | |
218 | ||
219 | extern void dn_start_slow_timer(struct sock *sk); | |
220 | extern void dn_stop_slow_timer(struct sock *sk); | |
221 | ||
c4ea94ab | 222 | extern __le16 decnet_address; |
1da177e4 LT |
223 | extern int decnet_debug_level; |
224 | extern int decnet_time_wait; | |
225 | extern int decnet_dn_count; | |
226 | extern int decnet_di_count; | |
227 | extern int decnet_dr_count; | |
228 | extern int decnet_no_fc_max_cwnd; | |
229 | ||
1f12bcc9 SW |
230 | extern int sysctl_decnet_mem[3]; |
231 | extern int sysctl_decnet_wmem[3]; | |
232 | extern int sysctl_decnet_rmem[3]; | |
233 | ||
1da177e4 | 234 | #endif /* _NET_DN_H */ |