![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ns.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Net/2] / Net2 / netns|
Return to ns.c CVS log | Up to [Net/2] / Net2 / netns |
1.1 root 1: /*
2: * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)ns.c 7.8 (Berkeley) 6/27/91
! 34: * ns.c,v 1.2 1993/05/20 04:35:50 cgd Exp
1.1 root 35: */
36:
37: #include "param.h"
38: #include "mbuf.h"
39: #include "ioctl.h"
40: #include "protosw.h"
41: #include "errno.h"
42: #include "socket.h"
43: #include "socketvar.h"
44:
45:
46: #include "../net/if.h"
47: #include "../net/route.h"
48: #include "../net/af.h"
49:
50: #include "ns.h"
51: #include "ns_if.h"
52:
53: #ifdef NS
54:
55: struct ns_ifaddr *ns_ifaddr;
56: int ns_interfaces;
57: extern struct sockaddr_ns ns_netmask, ns_hostmask;
58:
59: /*
60: * Generic internet control operations (ioctl's).
61: */
62: /* ARGSUSED */
63: ns_control(so, cmd, data, ifp)
64: struct socket *so;
65: int cmd;
66: caddr_t data;
67: register struct ifnet *ifp;
68: {
69: register struct ifreq *ifr = (struct ifreq *)data;
70: register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
71: register struct ns_ifaddr *ia;
72: struct ifaddr *ifa;
73: struct ns_ifaddr *oia;
74: struct mbuf *m;
75: int error, dstIsNew, hostIsNew;
76:
77: /*
78: * Find address for this interface, if it exists.
79: */
80: if (ifp == 0)
81: return (EADDRNOTAVAIL);
82: for (ia = ns_ifaddr; ia; ia = ia->ia_next)
83: if (ia->ia_ifp == ifp)
84: break;
85:
86: switch (cmd) {
87:
88: case SIOCGIFADDR:
89: if (ia == (struct ns_ifaddr *)0)
90: return (EADDRNOTAVAIL);
91: *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
92: return (0);
93:
94:
95: case SIOCGIFBRDADDR:
96: if (ia == (struct ns_ifaddr *)0)
97: return (EADDRNOTAVAIL);
98: if ((ifp->if_flags & IFF_BROADCAST) == 0)
99: return (EINVAL);
100: *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
101: return (0);
102:
103: case SIOCGIFDSTADDR:
104: if (ia == (struct ns_ifaddr *)0)
105: return (EADDRNOTAVAIL);
106: if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
107: return (EINVAL);
108: *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
109: return (0);
110: }
111:
112: if ((so->so_state & SS_PRIV) == 0)
113: return (EPERM);
114:
115: switch (cmd) {
116: case SIOCAIFADDR:
117: case SIOCDIFADDR:
118: if (ifra->ifra_addr.sns_family == AF_NS)
119: for (oia = ia; ia; ia = ia->ia_next) {
120: if (ia->ia_ifp == ifp &&
121: ns_neteq(ia->ia_addr.sns_addr,
122: ifra->ifra_addr.sns_addr))
123: break;
124: }
125: if (cmd == SIOCDIFADDR && ia == 0)
126: return (EADDRNOTAVAIL);
127: /* FALLTHROUGH */
128:
129: case SIOCSIFADDR:
130: case SIOCSIFDSTADDR:
131: if (ia == (struct ns_ifaddr *)0) {
132: m = m_getclr(M_WAIT, MT_IFADDR);
133: if (m == (struct mbuf *)NULL)
134: return (ENOBUFS);
135: if (ia = ns_ifaddr) {
136: for ( ; ia->ia_next; ia = ia->ia_next)
137: ;
138: ia->ia_next = mtod(m, struct ns_ifaddr *);
139: } else
140: ns_ifaddr = mtod(m, struct ns_ifaddr *);
141: ia = mtod(m, struct ns_ifaddr *);
142: if (ifa = ifp->if_addrlist) {
143: for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
144: ;
145: ifa->ifa_next = (struct ifaddr *) ia;
146: } else
147: ifp->if_addrlist = (struct ifaddr *) ia;
148: ia->ia_ifp = ifp;
149: ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
150:
151: ia->ia_ifa.ifa_netmask =
152: (struct sockaddr *)&ns_netmask;
153:
154: ia->ia_ifa.ifa_dstaddr =
155: (struct sockaddr *)&ia->ia_dstaddr;
156: if (ifp->if_flags & IFF_BROADCAST) {
157: ia->ia_broadaddr.sns_family = AF_NS;
158: ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
159: ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
160: }
161: ns_interfaces++;
162: }
163: }
164:
165: switch (cmd) {
166: int error;
167:
168: case SIOCSIFDSTADDR:
169: if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
170: return (EINVAL);
171: if (ia->ia_flags & IFA_ROUTE) {
172: rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
173: ia->ia_flags &= ~IFA_ROUTE;
174: }
175: if (ifp->if_ioctl) {
176: error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
177: if (error)
178: return (error);
179: }
180: *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
181: return (0);
182:
183: case SIOCSIFADDR:
184: return (ns_ifinit(ifp, ia,
185: (struct sockaddr_ns *)&ifr->ifr_addr, 1));
186:
187: case SIOCDIFADDR:
188: ns_ifscrub(ifp, ia);
189: if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
190: ifp->if_addrlist = ifa->ifa_next;
191: else {
192: while (ifa->ifa_next &&
193: (ifa->ifa_next != (struct ifaddr *)ia))
194: ifa = ifa->ifa_next;
195: if (ifa->ifa_next)
196: ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
197: else
198: printf("Couldn't unlink nsifaddr from ifp\n");
199: }
200: oia = ia;
201: if (oia == (ia = ns_ifaddr)) {
202: ns_ifaddr = ia->ia_next;
203: } else {
204: while (ia->ia_next && (ia->ia_next != oia)) {
205: ia = ia->ia_next;
206: }
207: if (ia->ia_next)
208: ia->ia_next = oia->ia_next;
209: else
210: printf("Didn't unlink nsifadr from list\n");
211: }
212: (void) m_free(dtom(oia));
213: if (0 == --ns_interfaces) {
214: /*
215: * We reset to virginity and start all over again
216: */
217: ns_thishost = ns_zerohost;
218: }
219: return (0);
220:
221: case SIOCAIFADDR:
222: dstIsNew = 0; hostIsNew = 1;
223: if (ia->ia_addr.sns_family == AF_NS) {
224: if (ifra->ifra_addr.sns_len == 0) {
225: ifra->ifra_addr = ia->ia_addr;
226: hostIsNew = 0;
227: } else if (ns_neteq(ifra->ifra_addr.sns_addr,
228: ia->ia_addr.sns_addr))
229: hostIsNew = 0;
230: }
231: if ((ifp->if_flags & IFF_POINTOPOINT) &&
232: (ifra->ifra_dstaddr.sns_family == AF_NS)) {
233: if (hostIsNew == 0)
234: ns_ifscrub(ifp, ia);
235: ia->ia_dstaddr = ifra->ifra_dstaddr;
236: dstIsNew = 1;
237: }
238: if (ifra->ifra_addr.sns_family == AF_NS &&
239: (hostIsNew || dstIsNew))
240: error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
241: return (error);
242:
243: default:
244: if (ifp->if_ioctl == 0)
245: return (EOPNOTSUPP);
246: return ((*ifp->if_ioctl)(ifp, cmd, data));
247: }
248: }
249:
250: /*
251: * Delete any previous route for an old address.
252: */
253: ns_ifscrub(ifp, ia)
254: register struct ifnet *ifp;
255: register struct ns_ifaddr *ia;
256: {
257: if (ia->ia_flags & IFA_ROUTE) {
258: if (ifp->if_flags & IFF_POINTOPOINT) {
259: rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
260: } else
261: rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
262: ia->ia_flags &= ~IFA_ROUTE;
263: }
264: }
265: /*
266: * Initialize an interface's internet address
267: * and routing table entry.
268: */
269: ns_ifinit(ifp, ia, sns, scrub)
270: register struct ifnet *ifp;
271: register struct ns_ifaddr *ia;
272: register struct sockaddr_ns *sns;
273: {
274: struct sockaddr_ns oldaddr;
275: register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
276: int s = splimp(), error;
277:
278: /*
279: * Set up new addresses.
280: */
281: oldaddr = ia->ia_addr;
282: ia->ia_addr = *sns;
283: /*
284: * The convention we shall adopt for naming is that
285: * a supplied address of zero means that "we don't care".
286: * if there is a single interface, use the address of that
287: * interface as our 6 byte host address.
288: * if there are multiple interfaces, use any address already
289: * used.
290: *
291: * Give the interface a chance to initialize
292: * if this is its first address,
293: * and to validate the address if necessary.
294: */
295: if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
296: if (ifp->if_ioctl &&
297: (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
298: ia->ia_addr = oldaddr;
299: splx(s);
300: return (error);
301: }
302: ns_thishost = *h;
303: } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
304: || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
305: *h = ns_thishost;
306: if (ifp->if_ioctl &&
307: (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
308: ia->ia_addr = oldaddr;
309: splx(s);
310: return (error);
311: }
312: if (!ns_hosteqnh(ns_thishost,*h)) {
313: ia->ia_addr = oldaddr;
314: splx(s);
315: return (EINVAL);
316: }
317: } else {
318: ia->ia_addr = oldaddr;
319: splx(s);
320: return (EINVAL);
321: }
322: /*
323: * Add route for the network.
324: */
325: if (scrub) {
326: ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
327: ns_ifscrub(ifp, ia);
328: ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
329: }
330: if (ifp->if_flags & IFF_POINTOPOINT)
331: rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
332: else {
333: ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
334: rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
335: }
336: ia->ia_flags |= IFA_ROUTE;
337: return (0);
338: }
339:
340: /*
341: * Return address info for specified internet network.
342: */
343: struct ns_ifaddr *
344: ns_iaonnetof(dst)
345: register struct ns_addr *dst;
346: {
347: register struct ns_ifaddr *ia;
348: register struct ns_addr *compare;
349: register struct ifnet *ifp;
350: struct ns_ifaddr *ia_maybe = 0;
351: union ns_net net = dst->x_net;
352:
353: for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
354: if (ifp = ia->ia_ifp) {
355: if (ifp->if_flags & IFF_POINTOPOINT) {
356: compare = &satons_addr(ia->ia_dstaddr);
357: if (ns_hosteq(*dst, *compare))
358: return (ia);
359: if (ns_neteqnn(net, ia->ia_net))
360: ia_maybe = ia;
361: } else {
362: if (ns_neteqnn(net, ia->ia_net))
363: return (ia);
364: }
365: }
366: }
367: return (ia_maybe);
368: }
369: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.