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4a10c08d KS |
1 | /* |
2 | * Copyright (c) 1985 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
6 | * This file include significant work done at Cornell University | |
7 | * by Bill Nesheim. That work included by permission. | |
8 | */ | |
9 | ||
53eed0ef | 10 | #ifndef lint |
9562f6c6 | 11 | static char sccsid[] = "@(#)af.c 5.6 (Berkeley) %G%"; |
4a10c08d KS |
12 | #endif not lint |
13 | ||
53eed0ef KS |
14 | |
15 | #include "defs.h" | |
16 | ||
17 | /* | |
18 | * Address family support routines | |
19 | */ | |
20 | int null_hash(), null_netmatch(), null_output(), | |
21 | null_portmatch(), null_portcheck(), | |
22 | null_checkhost(), null_ishost(), null_canon(); | |
23 | int xnnet_hash(), xnnet_netmatch(), xnnet_output(), | |
24 | xnnet_portmatch(); | |
25 | xnnet_checkhost(), xnnet_ishost(), xnnet_canon(); | |
26 | #define NIL \ | |
27 | { null_hash, null_netmatch, null_output, \ | |
28 | null_portmatch, null_portcheck, null_checkhost, \ | |
29 | null_ishost, null_canon } | |
30 | #define XNSNET \ | |
31 | { xnnet_hash, xnnet_netmatch, xnnet_output, \ | |
32 | xnnet_portmatch, xnnet_portmatch, xnnet_checkhost, \ | |
33 | xnnet_ishost, xnnet_canon } | |
34 | ||
35 | struct afswitch afswitch[AF_MAX] = | |
36 | { NIL, NIL, NIL, NIL, NIL, NIL, XNSNET, NIL, NIL, NIL, NIL }; | |
37 | ||
48681466 | 38 | struct sockaddr_ns xnnet_default = { AF_NS }; |
53eed0ef | 39 | |
0a5735f6 KS |
40 | union ns_net ns_anynet; |
41 | union ns_net ns_zeronet; | |
42 | ||
48681466 KS |
43 | xnnet_hash(sns, hp) |
44 | register struct sockaddr_ns *sns; | |
53eed0ef KS |
45 | struct afhash *hp; |
46 | { | |
48681466 KS |
47 | register long hash = 0; |
48 | register u_short *s = sns->sns_addr.x_host.s_host; | |
0a5735f6 KS |
49 | union ns_net_u net; |
50 | ||
51 | net.net_e = sns->sns_addr.x_net; | |
52 | hp->afh_nethash = net.long_e; | |
48681466 KS |
53 | hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s; |
54 | hp->afh_hosthash = hash; | |
53eed0ef KS |
55 | } |
56 | ||
57 | xnnet_netmatch(sxn1, sxn2) | |
48681466 | 58 | struct sockaddr_ns *sxn1, *sxn2; |
53eed0ef | 59 | { |
0a5735f6 | 60 | return (ns_neteq(sxn1->sns_addr, sxn2->sns_addr)); |
53eed0ef KS |
61 | } |
62 | ||
63 | /* | |
64 | * Verify the message is from the right port. | |
65 | */ | |
48681466 KS |
66 | xnnet_portmatch(sns) |
67 | register struct sockaddr_ns *sns; | |
53eed0ef KS |
68 | { |
69 | ||
48681466 | 70 | return (ntohs(sns->sns_addr.x_port) == IDPPORT_RIF ); |
53eed0ef KS |
71 | } |
72 | ||
73 | ||
74 | /* | |
75 | * xns output routine. | |
76 | */ | |
77 | #ifdef DEBUG | |
78 | int do_output = 0; | |
79 | #endif | |
48681466 KS |
80 | xnnet_output(flags, sns, size) |
81 | int flags; | |
82 | struct sockaddr_ns *sns; | |
53eed0ef KS |
83 | int size; |
84 | { | |
48681466 | 85 | struct sockaddr_ns dst; |
53eed0ef | 86 | |
48681466 KS |
87 | dst = *sns; |
88 | sns = &dst; | |
89 | if (sns->sns_addr.x_port == 0) | |
90 | sns->sns_addr.x_port = htons(IDPPORT_RIF); | |
53eed0ef KS |
91 | #ifdef DEBUG |
92 | if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST) | |
93 | #endif | |
610b111d KS |
94 | /* |
95 | * Kludge to allow us to get routes out to machines that | |
96 | * don't know their addresses yet; send to that address on | |
97 | * ALL connected nets | |
98 | */ | |
0a5735f6 | 99 | if (ns_neteqnn(sns->sns_addr.x_net, ns_zeronet)) { |
610b111d KS |
100 | extern struct interface *ifnet; |
101 | register struct interface *ifp; | |
102 | ||
103 | for (ifp = ifnet; ifp; ifp = ifp->int_next) { | |
0a5735f6 KS |
104 | sns->sns_addr.x_net = |
105 | satons_addr(ifp->int_addr).x_net; | |
9562f6c6 | 106 | (void) sendto(s, msg, size, flags, sns, sizeof (*sns)); |
610b111d KS |
107 | } |
108 | return; | |
109 | } | |
110 | ||
9562f6c6 | 111 | (void) sendto(s, msg, size, flags, sns, sizeof (*sns)); |
53eed0ef KS |
112 | } |
113 | ||
114 | /* | |
4a10c08d KS |
115 | * Return 1 if we want this route. |
116 | * We use this to disallow route net G entries for one for multiple | |
117 | * point to point links. | |
53eed0ef | 118 | */ |
48681466 KS |
119 | xnnet_checkhost(sns) |
120 | struct sockaddr_ns *sns; | |
53eed0ef | 121 | { |
4a10c08d KS |
122 | register struct interface *ifp = if_ifwithnet(sns); |
123 | /* | |
124 | * We want this route if there is no more than one | |
125 | * point to point interface with this network. | |
126 | */ | |
127 | if (ifp == 0 || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1); | |
128 | return (ifp->int_sq.n == ifp->int_sq.p); | |
53eed0ef KS |
129 | } |
130 | ||
131 | /* | |
132 | * Return 1 if the address is | |
133 | * for a host, 0 for a network. | |
134 | */ | |
48681466 KS |
135 | xnnet_ishost(sns) |
136 | struct sockaddr_ns *sns; | |
53eed0ef | 137 | { |
48681466 | 138 | register u_short *s = sns->sns_addr.x_host.s_host; |
53eed0ef | 139 | |
48681466 KS |
140 | if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff)) |
141 | return (0); | |
142 | else | |
143 | return (1); | |
53eed0ef KS |
144 | } |
145 | ||
48681466 KS |
146 | xnnet_canon(sns) |
147 | struct sockaddr_ns *sns; | |
53eed0ef KS |
148 | { |
149 | ||
48681466 | 150 | sns->sns_addr.x_port = 0; |
53eed0ef KS |
151 | } |
152 | ||
153 | /*ARGSUSED*/ | |
154 | null_hash(addr, hp) | |
155 | struct sockaddr *addr; | |
156 | struct afhash *hp; | |
157 | { | |
158 | ||
159 | hp->afh_nethash = hp->afh_hosthash = 0; | |
160 | } | |
161 | ||
162 | /*ARGSUSED*/ | |
163 | null_netmatch(a1, a2) | |
164 | struct sockaddr *a1, *a2; | |
165 | { | |
166 | ||
167 | return (0); | |
168 | } | |
169 | ||
170 | /*ARGSUSED*/ | |
171 | null_output(s, f, a1, n) | |
172 | int s, f; | |
173 | struct sockaddr *a1; | |
174 | int n; | |
175 | { | |
176 | ||
177 | ; | |
178 | } | |
179 | ||
180 | /*ARGSUSED*/ | |
181 | null_portmatch(a1) | |
182 | struct sockaddr *a1; | |
183 | { | |
184 | ||
185 | return (0); | |
186 | } | |
187 | ||
188 | /*ARGSUSED*/ | |
189 | null_portcheck(a1) | |
190 | struct sockaddr *a1; | |
191 | { | |
192 | ||
193 | return (0); | |
194 | } | |
195 | ||
196 | /*ARGSUSED*/ | |
197 | null_ishost(a1) | |
198 | struct sockaddr *a1; | |
199 | { | |
200 | ||
201 | return (0); | |
202 | } | |
203 | ||
204 | /*ARGSUSED*/ | |
205 | null_checkhost(a1) | |
206 | struct sockaddr *a1; | |
207 | { | |
208 | ||
209 | return (0); | |
210 | } | |
211 | ||
212 | /*ARGSUSED*/ | |
213 | null_canon(a1) | |
214 | struct sockaddr *a1; | |
215 | { | |
216 | ||
217 | ; | |
218 | } |