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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> | |
c752f073 | 6 | #include <net/tcp.h> |
1da177e4 LT |
7 | #include <asm/byteorder.h> |
8 | ||
c4ea94ab SW |
9 | #define dn_ntohs(x) le16_to_cpu(x) |
10 | #define dn_htons(x) cpu_to_le16(x) | |
1da177e4 LT |
11 | |
12 | struct dn_scp /* Session Control Port */ | |
13 | { | |
14 | unsigned char state; | |
15 | #define DN_O 1 /* Open */ | |
16 | #define DN_CR 2 /* Connect Receive */ | |
17 | #define DN_DR 3 /* Disconnect Reject */ | |
18 | #define DN_DRC 4 /* Discon. Rej. Complete*/ | |
19 | #define DN_CC 5 /* Connect Confirm */ | |
20 | #define DN_CI 6 /* Connect Initiate */ | |
21 | #define DN_NR 7 /* No resources */ | |
22 | #define DN_NC 8 /* No communication */ | |
23 | #define DN_CD 9 /* Connect Delivery */ | |
24 | #define DN_RJ 10 /* Rejected */ | |
25 | #define DN_RUN 11 /* Running */ | |
26 | #define DN_DI 12 /* Disconnect Initiate */ | |
27 | #define DN_DIC 13 /* Disconnect Complete */ | |
28 | #define DN_DN 14 /* Disconnect Notificat */ | |
29 | #define DN_CL 15 /* Closed */ | |
30 | #define DN_CN 16 /* Closed Notification */ | |
31 | ||
c4ea94ab SW |
32 | __le16 addrloc; |
33 | __le16 addrrem; | |
34 | __u16 numdat; | |
35 | __u16 numoth; | |
36 | __u16 numoth_rcv; | |
37 | __u16 numdat_rcv; | |
38 | __u16 ackxmt_dat; | |
39 | __u16 ackxmt_oth; | |
40 | __u16 ackrcv_dat; | |
41 | __u16 ackrcv_oth; | |
42 | __u8 flowrem_sw; | |
43 | __u8 flowloc_sw; | |
1da177e4 LT |
44 | #define DN_SEND 2 |
45 | #define DN_DONTSEND 1 | |
46 | #define DN_NOCHANGE 0 | |
c4ea94ab SW |
47 | __u16 flowrem_dat; |
48 | __u16 flowrem_oth; | |
49 | __u16 flowloc_dat; | |
50 | __u16 flowloc_oth; | |
51 | __u8 services_rem; | |
52 | __u8 services_loc; | |
53 | __u8 info_rem; | |
54 | __u8 info_loc; | |
55 | ||
56 | __u16 segsize_rem; | |
57 | __u16 segsize_loc; | |
58 | ||
59 | __u8 nonagle; | |
60 | __u8 multi_ireq; | |
61 | __u8 accept_mode; | |
1da177e4 LT |
62 | unsigned long seg_total; /* Running total of current segment */ |
63 | ||
64 | struct optdata_dn conndata_in; | |
65 | struct optdata_dn conndata_out; | |
66 | struct optdata_dn discdata_in; | |
67 | struct optdata_dn discdata_out; | |
68 | struct accessdata_dn accessdata; | |
69 | ||
70 | struct sockaddr_dn addr; /* Local address */ | |
71 | struct sockaddr_dn peer; /* Remote address */ | |
72 | ||
73 | /* | |
74 | * In this case the RTT estimation is not specified in the | |
75 | * docs, nor is any back off algorithm. Here we follow well | |
76 | * known tcp algorithms with a few small variations. | |
77 | * | |
78 | * snd_window: Max number of packets we send before we wait for | |
79 | * an ack to come back. This will become part of a | |
80 | * more complicated scheme when we support flow | |
81 | * control. | |
82 | * | |
83 | * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling | |
84 | * average. | |
85 | * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the | |
86 | * varience of the smoothed average (but calculated in | |
87 | * a simpler way than for normal statistical varience | |
88 | * calculations). | |
89 | * | |
90 | * nsp_rxtshift: Backoff counter. Value is zero normally, each time | |
91 | * a packet is lost is increases by one until an ack | |
92 | * is received. Its used to index an array of backoff | |
93 | * multipliers. | |
94 | */ | |
95 | #define NSP_MIN_WINDOW 1 | |
96 | #define NSP_MAX_WINDOW (0x07fe) | |
97 | unsigned long max_window; | |
98 | unsigned long snd_window; | |
99 | #define NSP_INITIAL_SRTT (HZ) | |
100 | unsigned long nsp_srtt; | |
101 | #define NSP_INITIAL_RTTVAR (HZ*3) | |
102 | unsigned long nsp_rttvar; | |
103 | #define NSP_MAXRXTSHIFT 12 | |
104 | unsigned long nsp_rxtshift; | |
105 | ||
106 | /* | |
107 | * Output queues, one for data, one for otherdata/linkservice | |
108 | */ | |
109 | struct sk_buff_head data_xmit_queue; | |
110 | struct sk_buff_head other_xmit_queue; | |
111 | ||
112 | /* | |
113 | * Input queue for other data | |
114 | */ | |
115 | struct sk_buff_head other_receive_queue; | |
116 | int other_report; | |
117 | ||
118 | /* | |
119 | * Stuff to do with the slow timer | |
120 | */ | |
121 | unsigned long stamp; /* time of last transmit */ | |
122 | unsigned long persist; | |
123 | int (*persist_fxn)(struct sock *sk); | |
124 | unsigned long keepalive; | |
125 | void (*keepalive_fxn)(struct sock *sk); | |
126 | ||
127 | /* | |
128 | * This stuff is for the fast timer for delayed acks | |
129 | */ | |
130 | struct timer_list delack_timer; | |
131 | int delack_pending; | |
132 | void (*delack_fxn)(struct sock *sk); | |
133 | ||
134 | }; | |
135 | ||
136 | static inline struct dn_scp *DN_SK(struct sock *sk) | |
137 | { | |
138 | return (struct dn_scp *)(sk + 1); | |
139 | } | |
140 | ||
141 | /* | |
142 | * src,dst : Source and Destination DECnet addresses | |
143 | * hops : Number of hops through the network | |
144 | * dst_port, src_port : NSP port numbers | |
145 | * services, info : Useful data extracted from conninit messages | |
146 | * rt_flags : Routing flags byte | |
147 | * nsp_flags : NSP layer flags byte | |
148 | * segsize : Size of segment | |
149 | * segnum : Number, for data, otherdata and linkservice | |
150 | * xmit_count : Number of times we've transmitted this skb | |
151 | * stamp : Time stamp of most recent transmission, used in RTT calculations | |
152 | * iif: Input interface number | |
153 | * | |
154 | * As a general policy, this structure keeps all addresses in network | |
155 | * byte order, and all else in host byte order. Thus dst, src, dst_port | |
156 | * and src_port are in network order. All else is in host order. | |
157 | * | |
158 | */ | |
159 | #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb) | |
160 | struct dn_skb_cb { | |
c4ea94ab SW |
161 | __le16 dst; |
162 | __le16 src; | |
163 | __u16 hops; | |
164 | __le16 dst_port; | |
165 | __le16 src_port; | |
166 | __u8 services; | |
167 | __u8 info; | |
168 | __u8 rt_flags; | |
169 | __u8 nsp_flags; | |
170 | __u16 segsize; | |
171 | __u16 segnum; | |
172 | __u16 xmit_count; | |
1da177e4 LT |
173 | unsigned long stamp; |
174 | int iif; | |
175 | }; | |
176 | ||
c4ea94ab | 177 | static inline __le16 dn_eth2dn(unsigned char *ethaddr) |
1da177e4 | 178 | { |
c4ea94ab | 179 | return dn_htons(ethaddr[4] | (ethaddr[5] << 8)); |
1da177e4 LT |
180 | } |
181 | ||
c4ea94ab | 182 | static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) |
1da177e4 | 183 | { |
c4ea94ab | 184 | return *(__le16 *)saddr->sdn_nodeaddr; |
1da177e4 LT |
185 | } |
186 | ||
c4ea94ab | 187 | static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) |
1da177e4 | 188 | { |
c4ea94ab | 189 | __u16 a = dn_ntohs(addr); |
1da177e4 LT |
190 | ethaddr[0] = 0xAA; |
191 | ethaddr[1] = 0x00; | |
192 | ethaddr[2] = 0x04; | |
193 | ethaddr[3] = 0x00; | |
c4ea94ab SW |
194 | ethaddr[4] = (__u8)(a & 0xff); |
195 | ethaddr[5] = (__u8)(a >> 8); | |
1da177e4 LT |
196 | } |
197 | ||
198 | static 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; | |
1da177e4 LT |
202 | } |
203 | ||
204 | extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu); | |
205 | ||
206 | #define DN_MENUVER_ACC 0x01 | |
207 | #define DN_MENUVER_USR 0x02 | |
208 | #define DN_MENUVER_PRX 0x04 | |
209 | #define DN_MENUVER_UIC 0x08 | |
210 | ||
211 | extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); | |
212 | extern struct sock *dn_find_by_skb(struct sk_buff *skb); | |
213 | #define DN_ASCBUF_LEN 9 | |
c4ea94ab | 214 | extern char *dn_addr2asc(__u16, char *); |
1da177e4 LT |
215 | extern int dn_destroy_timer(struct sock *sk); |
216 | ||
217 | extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type); | |
218 | extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type); | |
219 | ||
220 | extern void dn_start_slow_timer(struct sock *sk); | |
221 | extern void dn_stop_slow_timer(struct sock *sk); | |
222 | ||
c4ea94ab | 223 | extern __le16 decnet_address; |
1da177e4 LT |
224 | extern int decnet_debug_level; |
225 | extern int decnet_time_wait; | |
226 | extern int decnet_dn_count; | |
227 | extern int decnet_di_count; | |
228 | extern int decnet_dr_count; | |
229 | extern int decnet_no_fc_max_cwnd; | |
230 | ||
1f12bcc9 SW |
231 | extern int sysctl_decnet_mem[3]; |
232 | extern int sysctl_decnet_wmem[3]; | |
233 | extern int sysctl_decnet_rmem[3]; | |
234 | ||
1da177e4 | 235 | #endif /* _NET_DN_H */ |