ipx.c revision 36735 
1/*
2 * Copyright (c) 1995, Mike Mitchell
3 * Copyright (c) 1984, 1985, 1986, 1987, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)ipx.c
35 *
36 * $Id: ipx.c,v 1.11 1997/06/26 19:35:42 jhay Exp $
37 */
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/malloc.h>
42#include <sys/sockio.h>
43#include <sys/proc.h>
44#include <sys/socket.h>
45
46#include <net/if.h>
47#include <net/route.h>
48
49#include <netipx/ipx.h>
50#include <netipx/ipx_if.h>
51#include <netipx/ipx_var.h>
52
53struct ipx_ifaddr *ipx_ifaddr;
54
55static	void ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia);
56static	int ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
57		       struct sockaddr_ipx *sipx, int scrub);
58
59/*
60 * Generic internet control operations (ioctl's).
61 */
62int
63ipx_control(so, cmd, data, ifp, p)
64	struct socket *so;
65	u_long cmd;
66	caddr_t data;
67	register struct ifnet *ifp;
68	struct proc *p;
69{
70	register struct ifreq *ifr = (struct ifreq *)data;
71	register struct ipx_aliasreq *ifra = (struct ipx_aliasreq *)data;
72	register struct ipx_ifaddr *ia;
73	struct ifaddr *ifa;
74	struct ipx_ifaddr *oia;
75	int dstIsNew, hostIsNew;
76	int error = 0;
77
78	/*
79	 * Find address for this interface, if it exists.
80	 */
81	if (ifp == NULL)
82		return (EADDRNOTAVAIL);
83	for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
84		if (ia->ia_ifp == ifp)
85			break;
86
87	switch (cmd) {
88
89	case SIOCGIFADDR:
90		if (ia == NULL)
91			return (EADDRNOTAVAIL);
92		*(struct sockaddr_ipx *)&ifr->ifr_addr = ia->ia_addr;
93		return (0);
94
95	case SIOCGIFBRDADDR:
96		if (ia == NULL)
97			return (EADDRNOTAVAIL);
98		if ((ifp->if_flags & IFF_BROADCAST) == 0)
99			return (EINVAL);
100		*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
101		return (0);
102
103	case SIOCGIFDSTADDR:
104		if (ia == NULL)
105			return (EADDRNOTAVAIL);
106		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
107			return (EINVAL);
108		*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
109		return (0);
110	}
111
112	if (p && (error = suser(p->p_ucred, &p->p_acflag)) != 0)
113		return (error);
114
115	switch (cmd) {
116	case SIOCAIFADDR:
117	case SIOCDIFADDR:
118		if (ifra->ifra_addr.sipx_family == AF_IPX)
119		    for (oia = ia; ia != NULL; ia = ia->ia_next) {
120			if (ia->ia_ifp == ifp  &&
121			    ipx_neteq(ia->ia_addr.sipx_addr,
122				  ifra->ifra_addr.sipx_addr))
123			    break;
124		    }
125		if (cmd == SIOCDIFADDR && ia == NULL)
126			return (EADDRNOTAVAIL);
127		/* FALLTHROUGH */
128
129	case SIOCSIFADDR:
130	case SIOCSIFDSTADDR:
131		if (ia == NULL) {
132			oia = (struct ipx_ifaddr *)
133				malloc(sizeof(*ia), M_IFADDR, M_WAITOK);
134			if (oia == NULL)
135				return (ENOBUFS);
136			bzero((caddr_t)oia, sizeof(*oia));
137			if ((ia = ipx_ifaddr) != NULL) {
138				for ( ; ia->ia_next != NULL; ia = ia->ia_next)
139					;
140				ia->ia_next = oia;
141			} else
142				ipx_ifaddr = oia;
143			ia = oia;
144			ifa = (struct ifaddr *)ia;
145			TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
146			ia->ia_ifp = ifp;
147			ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
148
149			ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
150
151			ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
152			if (ifp->if_flags & IFF_BROADCAST) {
153				ia->ia_broadaddr.sipx_family = AF_IPX;
154				ia->ia_broadaddr.sipx_len = sizeof(ia->ia_addr);
155				ia->ia_broadaddr.sipx_addr.x_host = ipx_broadhost;
156			}
157		}
158	}
159
160	switch (cmd) {
161
162	case SIOCSIFDSTADDR:
163		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
164			return (EINVAL);
165		if (ia->ia_flags & IFA_ROUTE) {
166			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
167			ia->ia_flags &= ~IFA_ROUTE;
168		}
169		if (ifp->if_ioctl) {
170			error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, (void *)ia);
171			if (error)
172				return (error);
173		}
174		*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
175		return (0);
176
177	case SIOCSIFADDR:
178		return (ipx_ifinit(ifp, ia,
179				(struct sockaddr_ipx *)&ifr->ifr_addr, 1));
180
181	case SIOCDIFADDR:
182		ipx_ifscrub(ifp, ia);
183		ifa = (struct ifaddr *)ia;
184		TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
185		oia = ia;
186		if (oia == (ia = ipx_ifaddr)) {
187			ipx_ifaddr = ia->ia_next;
188		} else {
189			while (ia->ia_next && (ia->ia_next != oia)) {
190				ia = ia->ia_next;
191			}
192			if (ia->ia_next)
193			    ia->ia_next = oia->ia_next;
194			else
195				printf("Didn't unlink ipxifadr from list\n");
196		}
197		IFAFREE((&oia->ia_ifa));
198		return (0);
199
200	case SIOCAIFADDR:
201		dstIsNew = 0;
202		hostIsNew = 1;
203		if (ia->ia_addr.sipx_family == AF_IPX) {
204			if (ifra->ifra_addr.sipx_len == 0) {
205				ifra->ifra_addr = ia->ia_addr;
206				hostIsNew = 0;
207			} else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
208					 ia->ia_addr.sipx_addr))
209				hostIsNew = 0;
210		}
211		if ((ifp->if_flags & IFF_POINTOPOINT) &&
212		    (ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
213			if (hostIsNew == 0)
214				ipx_ifscrub(ifp, ia);
215			ia->ia_dstaddr = ifra->ifra_dstaddr;
216			dstIsNew  = 1;
217		}
218		if (ifra->ifra_addr.sipx_family == AF_IPX &&
219					    (hostIsNew || dstIsNew))
220			error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
221		return (error);
222
223	default:
224		if (ifp->if_ioctl == NULL)
225			return (EOPNOTSUPP);
226		return ((*ifp->if_ioctl)(ifp, cmd, data));
227	}
228}
229
230/*
231* Delete any previous route for an old address.
232*/
233static void
234ipx_ifscrub(ifp, ia)
235	register struct ifnet *ifp;
236	register struct ipx_ifaddr *ia;
237{
238	if (ia->ia_flags & IFA_ROUTE) {
239		if (ifp->if_flags & IFF_POINTOPOINT) {
240			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
241		} else
242			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
243		ia->ia_flags &= ~IFA_ROUTE;
244	}
245}
246/*
247 * Initialize an interface's internet address
248 * and routing table entry.
249 */
250static int
251ipx_ifinit(ifp, ia, sipx, scrub)
252	register struct ifnet *ifp;
253	register struct ipx_ifaddr *ia;
254	register struct sockaddr_ipx *sipx;
255	int scrub;
256{
257	struct sockaddr_ipx oldaddr;
258	int s = splimp(), error;
259
260	/*
261	 * Set up new addresses.
262	 */
263	oldaddr = ia->ia_addr;
264	ia->ia_addr = *sipx;
265
266	/*
267	 * The convention we shall adopt for naming is that
268	 * a supplied address of zero means that "we don't care".
269	 * Use the MAC address of the interface. If it is an
270	 * interface without a MAC address, like a serial line, the
271	 * address must be supplied.
272	 *
273	 * Give the interface a chance to initialize
274	 * if this is its first address,
275	 * and to validate the address if necessary.
276	 */
277	if (ifp->if_ioctl != NULL &&
278	    (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (void *)ia))) {
279		ia->ia_addr = oldaddr;
280		splx(s);
281		return (error);
282	}
283	splx(s);
284	ia->ia_ifa.ifa_metric = ifp->if_metric;
285	/*
286	 * Add route for the network.
287	 */
288	if (scrub) {
289		ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
290		ipx_ifscrub(ifp, ia);
291		ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
292	}
293	if (ifp->if_flags & IFF_POINTOPOINT)
294		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
295	else {
296		ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
297		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
298	}
299	ia->ia_flags |= IFA_ROUTE;
300	return (0);
301}
302
303/*
304 * Return address info for specified internet network.
305 */
306struct ipx_ifaddr *
307ipx_iaonnetof(dst)
308	register struct ipx_addr *dst;
309{
310	register struct ipx_ifaddr *ia;
311	register struct ipx_addr *compare;
312	register struct ifnet *ifp;
313	struct ipx_ifaddr *ia_maybe = NULL;
314	union ipx_net net = dst->x_net;
315
316	for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
317		if ((ifp = ia->ia_ifp) != NULL) {
318			if (ifp->if_flags & IFF_POINTOPOINT) {
319				compare = &satoipx_addr(ia->ia_dstaddr);
320				if (ipx_hosteq(*dst, *compare))
321					return (ia);
322				if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
323					ia_maybe = ia;
324			} else {
325				if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
326					return (ia);
327			}
328		}
329	}
330	return (ia_maybe);
331}
332
333
334void
335ipx_printhost(addr)
336register struct ipx_addr *addr;
337{
338	u_short port;
339	struct ipx_addr work = *addr;
340	register char *p; register u_char *q;
341	register char *net = "", *host = "";
342	char cport[10], chost[15], cnet[15];
343
344	port = ntohs(work.x_port);
345
346	if (ipx_nullnet(work) && ipx_nullhost(work)) {
347
348		if (port)
349			printf("*.%x", port);
350		else
351			printf("*.*");
352
353		return;
354	}
355
356	if (ipx_wildnet(work))
357		net = "any";
358	else if (ipx_nullnet(work))
359		net = "*";
360	else {
361		q = work.x_net.c_net;
362		sprintf(cnet, "%x%x%x%x",
363			q[0], q[1], q[2], q[3]);
364		for (p = cnet; *p == '0' && p < cnet + 8; p++)
365			continue;
366		net = p;
367	}
368
369	if (ipx_wildhost(work))
370		host = "any";
371	else if (ipx_nullhost(work))
372		host = "*";
373	else {
374		q = work.x_host.c_host;
375		sprintf(chost, "%x%x%x%x%x%x",
376			q[0], q[1], q[2], q[3], q[4], q[5]);
377		for (p = chost; *p == '0' && p < chost + 12; p++)
378			continue;
379		host = p;
380	}
381
382	if (port) {
383		if (strcmp(host, "*") == 0) {
384			host = "";
385			sprintf(cport, "%x", port);
386		} else
387			sprintf(cport, ".%x", port);
388	} else
389		*cport = 0;
390
391	printf("%s.%s%s", net, host, cport);
392}
393