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