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8ae0e4b4 KM |
1 | /* |
2 | * Copyright (c) 1982 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 | * @(#)ns.c 6.2 (Berkeley) %G% | |
7 | */ | |
de9bc7de KS |
8 | |
9 | #include "param.h" | |
10 | #include "mbuf.h" | |
11 | #include "ioctl.h" | |
12 | #include "protosw.h" | |
13 | #include "socket.h" | |
14 | #include "socketvar.h" | |
15 | #include "uio.h" | |
16 | #include "dir.h" | |
17 | #include "user.h" | |
18 | ||
19 | ||
20 | #include "../net/if.h" | |
21 | #include "../net/route.h" | |
22 | #include "../net/af.h" | |
23 | ||
24 | #include "ns.h" | |
25 | #include "ns_if.h" | |
26 | ||
27 | #ifdef NS | |
28 | ||
29 | struct ns_ifaddr *ns_ifaddr; | |
30 | ||
31 | ns_hash(sns, hp) | |
32 | register struct sockaddr_ns *sns; | |
33 | struct afhash *hp; | |
34 | { | |
35 | register long hash = 0; | |
36 | register u_short *s = sns->sns_addr.x_host.s_host; | |
37 | ||
38 | hp->afh_nethash = ns_netof(sns->sns_addr); | |
39 | hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s; | |
40 | hp->afh_hosthash = hash; | |
41 | } | |
42 | ||
43 | ||
44 | ns_netmatch(sns1, sns2) | |
45 | struct sockaddr_ns *sns1, *sns2; | |
46 | { | |
47 | ||
48 | return (ns_netof(sns1->sns_addr) == ns_netof(sns2->sns_addr)); | |
49 | } | |
50 | ||
51 | /* | |
52 | * Generic internet control operations (ioctl's). | |
53 | */ | |
54 | ns_control(so, cmd, data, ifp) | |
55 | struct socket *so; | |
56 | int cmd; | |
57 | caddr_t data; | |
58 | register struct ifnet *ifp; | |
59 | { | |
60 | register struct ifreq *ifr = (struct ifreq *)data; | |
61 | register struct ns_ifaddr *ia; | |
62 | struct ifaddr *ifa; | |
63 | struct mbuf *m; | |
64 | int error; | |
65 | ||
66 | if (!suser()) | |
67 | return (u.u_error); | |
68 | ||
69 | /* | |
70 | * Find address for this interface, if it exists. | |
71 | */ | |
72 | for (ia = ns_ifaddr; ia; ia = ia->ia_next) | |
73 | if (ia->ia_ifp == ifp) | |
74 | break; | |
75 | ||
76 | switch (cmd) { | |
77 | ||
78 | case SIOCGIFADDR: | |
79 | case SIOCGIFBRDADDR: | |
80 | case SIOCGIFDSTADDR: | |
81 | if (ia == (struct ns_ifaddr *)0) | |
82 | return (EADDRNOTAVAIL); | |
83 | break; | |
84 | ||
85 | case SIOCSIFDSTADDR: | |
86 | return (EOPNOTSUPP); | |
87 | ||
88 | case SIOCSIFADDR: | |
89 | if (ia == (struct ns_ifaddr *)0) { | |
90 | m = m_getclr(M_WAIT, MT_IFADDR); | |
91 | if (m == (struct mbuf *)NULL) | |
92 | return (ENOBUFS); | |
93 | if (ia = ns_ifaddr) { | |
94 | for ( ; ia->ia_next; ia = ia->ia_next) | |
95 | ; | |
96 | ia->ia_next = mtod(m, struct ns_ifaddr *); | |
97 | } else | |
98 | ns_ifaddr = mtod(m, struct ns_ifaddr *); | |
99 | ia = mtod(m, struct ns_ifaddr *); | |
100 | if (ifa = ifp->if_addrlist) { | |
101 | for ( ; ifa->ifa_next; ifa = ifa->ifa_next) | |
102 | ; | |
103 | ifa->ifa_next = (struct ifaddr *) ia; | |
104 | } else | |
105 | ifp->if_addrlist = (struct ifaddr *) ia; | |
106 | ia->ia_ifp = ifp; | |
107 | IA_SNS(ia)->sns_family = AF_NS; | |
108 | } | |
109 | break; | |
110 | } | |
111 | ||
112 | switch (cmd) { | |
113 | ||
114 | case SIOCGIFADDR: | |
115 | ifr->ifr_addr = ia->ia_addr; | |
116 | break; | |
117 | ||
118 | case SIOCGIFBRDADDR: | |
119 | if (ia == (struct ns_ifaddr *)0) | |
120 | return (EADDRNOTAVAIL); | |
121 | if ((ifp->if_flags & IFF_BROADCAST) == 0) | |
122 | return (EINVAL); | |
123 | ifr->ifr_dstaddr = ia->ia_broadaddr; | |
124 | break; | |
125 | ||
126 | case SIOCGIFDSTADDR: | |
127 | if (ia == (struct ns_ifaddr *)0) | |
128 | return (EADDRNOTAVAIL); | |
129 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) | |
130 | return (EINVAL); | |
131 | ifr->ifr_dstaddr = ia->ia_dstaddr; | |
132 | break; | |
133 | ||
134 | case SIOCSIFADDR: | |
135 | return | |
136 | (ns_ifinit(ifp, ia, (struct sockaddr_ns *)&ifr->ifr_addr)); | |
137 | ||
138 | default: | |
139 | if (ifp->if_ioctl == 0) | |
140 | return (EOPNOTSUPP); | |
141 | return ((*ifp->if_ioctl)(ifp, cmd, data)); | |
142 | } | |
143 | return (0); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Initialize an interface's internet address | |
148 | * and routing table entry. | |
149 | */ | |
150 | ns_ifinit(ifp, ia, sns) | |
151 | register struct ifnet *ifp; | |
152 | register struct ns_ifaddr *ia; | |
153 | struct sockaddr_ns *sns; | |
154 | { | |
155 | struct sockaddr_ns netaddr; | |
156 | register union ns_host *h = &(IA_SNS(ia)->sns_addr.x_host); | |
157 | int s = splimp(), error; | |
158 | ||
159 | /* | |
160 | * The convention we shall adopt for naming is that | |
161 | * a supplied address of zero means that "we don't care". | |
162 | * if there is a single interface, use the address of that | |
163 | * interface as our 6 byte host address. | |
164 | * if there are multiple interfaces, use any address already | |
165 | * used. | |
166 | * | |
167 | * If we have gotten into trouble and want to reset back to | |
168 | * virginity, we recognize a request of the broadcast address. | |
169 | */ | |
170 | if (ns_hosteqnh(sns->sns_addr.x_host, ns_broadhost)) { | |
171 | ns_thishost = ns_zerohost; | |
172 | splx(s); | |
173 | return(EINVAL); | |
174 | } | |
175 | ||
176 | /* | |
177 | * Delete any previous route for an old address. | |
178 | */ | |
179 | ||
180 | bzero((caddr_t)&netaddr, sizeof (netaddr)); | |
181 | netaddr.sns_family = AF_NS; | |
182 | netaddr.sns_addr.x_host = ns_broadhost; | |
183 | netaddr.sns_addr.x_net = ia->ia_net; | |
184 | if (ia->ia_flags & IFA_ROUTE) { | |
185 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { | |
186 | rtinit((struct sockaddr *)&netaddr, &ia->ia_addr, -1); | |
187 | } else | |
188 | rtinit((struct sockaddr *)&ia->ia_dstaddr, &ia->ia_addr, -1); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Set up new addresses. | |
193 | */ | |
194 | ia->ia_addr = *(struct sockaddr *)sns; | |
195 | ia->ia_net = sns->sns_addr.x_net; | |
196 | netaddr.sns_addr.x_net = ia->ia_net; | |
197 | if (ifp->if_flags & IFF_BROADCAST) { | |
198 | ia->ia_broadaddr = * (struct sockaddr *) &netaddr; | |
199 | } | |
200 | /* | |
201 | * Point to point links are a little touchier -- | |
202 | * We have to have an address of our own first, | |
203 | * and will use the supplied address as that of the other end. | |
204 | */ | |
205 | if (ifp->if_flags & IFF_POINTOPOINT) { | |
206 | struct sockaddr_ns *sns2 = IA_SNS(ia); | |
207 | if (ns_hosteqnh(ns_zerohost,ns_thishost)) | |
208 | return(EINVAL); | |
209 | ia->ia_dstaddr = ia->ia_addr; | |
210 | sns2->sns_addr.x_host = ns_thishost; | |
211 | sns->sns_addr.x_host = ns_thishost; | |
212 | } | |
213 | /* | |
214 | * Give the interface a chance to initialize | |
215 | * if this is its first address, | |
216 | * and to validate the address if necessary. | |
217 | */ | |
218 | ||
219 | if (ns_hosteqnh(ns_thishost, ns_zerohost)) { | |
220 | if (ifp->if_ioctl && | |
221 | (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { | |
222 | splx(s); | |
223 | return (error); | |
224 | } | |
225 | ns_thishost = *h; | |
226 | } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost) | |
227 | || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) { | |
228 | *h = ns_thishost; | |
229 | if (ifp->if_ioctl && | |
230 | (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { | |
231 | splx(s); | |
232 | return (error); | |
233 | } | |
234 | if(!ns_hosteqnh(ns_thishost,*h)) { | |
235 | splx(s); | |
236 | return (EINVAL); | |
237 | } | |
238 | } else { | |
239 | splx(s); | |
240 | return(EINVAL); | |
241 | } | |
242 | /* | |
243 | * Add route for the network. | |
244 | */ | |
245 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { | |
246 | rtinit((struct sockaddr *)&netaddr, &ia->ia_addr, RTF_UP); | |
247 | } else | |
248 | rtinit((struct sockaddr *)&ia->ia_dstaddr, &ia->ia_addr, | |
249 | RTF_HOST|RTF_UP); | |
250 | ia->ia_flags |= IFA_ROUTE; | |
251 | return(0); | |
252 | } | |
253 | ||
254 | /* | |
255 | * Return address info for specified internet network. | |
256 | */ | |
257 | struct ns_ifaddr * | |
258 | ns_iaonnetof(net) | |
259 | union ns_net net; | |
260 | { | |
261 | register struct ns_ifaddr *ia; | |
262 | ||
263 | #define NtoL(x) (*(long *)(&(x))) | |
264 | for (ia = ns_ifaddr; ia; ia = ia->ia_next) | |
265 | if (NtoL(ia->ia_net) == NtoL(net)) | |
266 | return (ia); | |
267 | return ((struct ns_ifaddr *)0); | |
268 | } | |
269 | #endif |