ipx.c revision 116189 
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
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/sys/netipx/ipx.c 116189 2003-06-11 05:37:42Z obrien $");
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/malloc.h>
43#include <sys/sockio.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, td)
64	struct socket *so;
65	u_long cmd;
66	caddr_t data;
67	register struct ifnet *ifp;
68	struct thread *td;
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 (td && (error = suser(td)) != 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,
134				M_WAITOK | M_ZERO);
135			if (oia == NULL)
136				return (ENOBUFS);
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			IFA_LOCK_INIT(ifa);
146			ifa->ifa_refcnt = 1;
147			TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
148			ia->ia_ifp = ifp;
149			ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
150
151			ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
152
153			ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
154			if (ifp->if_flags & IFF_BROADCAST) {
155				ia->ia_broadaddr.sipx_family = AF_IPX;
156				ia->ia_broadaddr.sipx_len = sizeof(ia->ia_addr);
157				ia->ia_broadaddr.sipx_addr.x_host = ipx_broadhost;
158			}
159		}
160	}
161
162	switch (cmd) {
163
164	case SIOCSIFDSTADDR:
165		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
166			return (EINVAL);
167		if (ia->ia_flags & IFA_ROUTE) {
168			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
169			ia->ia_flags &= ~IFA_ROUTE;
170		}
171		if (ifp->if_ioctl) {
172			error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, (void *)ia);
173			if (error)
174				return (error);
175		}
176		*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
177		return (0);
178
179	case SIOCSIFADDR:
180		return (ipx_ifinit(ifp, ia,
181				(struct sockaddr_ipx *)&ifr->ifr_addr, 1));
182
183	case SIOCDIFADDR:
184		ipx_ifscrub(ifp, ia);
185		ifa = (struct ifaddr *)ia;
186		TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
187		oia = ia;
188		if (oia == (ia = ipx_ifaddr)) {
189			ipx_ifaddr = ia->ia_next;
190		} else {
191			while (ia->ia_next && (ia->ia_next != oia)) {
192				ia = ia->ia_next;
193			}
194			if (ia->ia_next)
195			    ia->ia_next = oia->ia_next;
196			else
197				printf("Didn't unlink ipxifadr from list\n");
198		}
199		IFAFREE((&oia->ia_ifa));
200		return (0);
201
202	case SIOCAIFADDR:
203		dstIsNew = 0;
204		hostIsNew = 1;
205		if (ia->ia_addr.sipx_family == AF_IPX) {
206			if (ifra->ifra_addr.sipx_len == 0) {
207				ifra->ifra_addr = ia->ia_addr;
208				hostIsNew = 0;
209			} else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
210					 ia->ia_addr.sipx_addr))
211				hostIsNew = 0;
212		}
213		if ((ifp->if_flags & IFF_POINTOPOINT) &&
214		    (ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
215			if (hostIsNew == 0)
216				ipx_ifscrub(ifp, ia);
217			ia->ia_dstaddr = ifra->ifra_dstaddr;
218			dstIsNew  = 1;
219		}
220		if (ifra->ifra_addr.sipx_family == AF_IPX &&
221					    (hostIsNew || dstIsNew))
222			error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
223		return (error);
224
225	default:
226		if (ifp->if_ioctl == NULL)
227			return (EOPNOTSUPP);
228		return ((*ifp->if_ioctl)(ifp, cmd, data));
229	}
230}
231
232/*
233* Delete any previous route for an old address.
234*/
235static void
236ipx_ifscrub(ifp, ia)
237	register struct ifnet *ifp;
238	register struct ipx_ifaddr *ia;
239{
240	if (ia->ia_flags & IFA_ROUTE) {
241		if (ifp->if_flags & IFF_POINTOPOINT) {
242			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
243		} else
244			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
245		ia->ia_flags &= ~IFA_ROUTE;
246	}
247}
248/*
249 * Initialize an interface's internet address
250 * and routing table entry.
251 */
252static int
253ipx_ifinit(ifp, ia, sipx, scrub)
254	register struct ifnet *ifp;
255	register struct ipx_ifaddr *ia;
256	register struct sockaddr_ipx *sipx;
257	int scrub;
258{
259	struct sockaddr_ipx oldaddr;
260	int s = splimp(), error;
261
262	/*
263	 * Set up new addresses.
264	 */
265	oldaddr = ia->ia_addr;
266	ia->ia_addr = *sipx;
267
268	/*
269	 * The convention we shall adopt for naming is that
270	 * a supplied address of zero means that "we don't care".
271	 * Use the MAC address of the interface. If it is an
272	 * interface without a MAC address, like a serial line, the
273	 * address must be supplied.
274	 *
275	 * Give the interface a chance to initialize
276	 * if this is its first address,
277	 * and to validate the address if necessary.
278	 */
279	if (ifp->if_ioctl != NULL &&
280	    (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (void *)ia))) {
281		ia->ia_addr = oldaddr;
282		splx(s);
283		return (error);
284	}
285	splx(s);
286	ia->ia_ifa.ifa_metric = ifp->if_metric;
287	/*
288	 * Add route for the network.
289	 */
290	if (scrub) {
291		ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
292		ipx_ifscrub(ifp, ia);
293		ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
294	}
295	if (ifp->if_flags & IFF_POINTOPOINT)
296		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
297	else {
298		ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
299		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
300	}
301	ia->ia_flags |= IFA_ROUTE;
302	return (0);
303}
304
305/*
306 * Return address info for specified internet network.
307 */
308struct ipx_ifaddr *
309ipx_iaonnetof(dst)
310	register struct ipx_addr *dst;
311{
312	register struct ipx_ifaddr *ia;
313	register struct ipx_addr *compare;
314	register struct ifnet *ifp;
315	struct ipx_ifaddr *ia_maybe = NULL;
316	union ipx_net net = dst->x_net;
317
318	for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
319		if ((ifp = ia->ia_ifp) != NULL) {
320			if (ifp->if_flags & IFF_POINTOPOINT) {
321				compare = &satoipx_addr(ia->ia_dstaddr);
322				if (ipx_hosteq(*dst, *compare))
323					return (ia);
324				if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
325					ia_maybe = ia;
326			} else {
327				if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
328					return (ia);
329			}
330		}
331	}
332	return (ia_maybe);
333}
334
335
336void
337ipx_printhost(addr)
338register struct ipx_addr *addr;
339{
340	u_short port;
341	struct ipx_addr work = *addr;
342	register char *p; register u_char *q;
343	register char *net = "", *host = "";
344	char cport[10], chost[15], cnet[15];
345
346	port = ntohs(work.x_port);
347
348	if (ipx_nullnet(work) && ipx_nullhost(work)) {
349
350		if (port)
351			printf("*.%x", port);
352		else
353			printf("*.*");
354
355		return;
356	}
357
358	if (ipx_wildnet(work))
359		net = "any";
360	else if (ipx_nullnet(work))
361		net = "*";
362	else {
363		q = work.x_net.c_net;
364		snprintf(cnet, sizeof(cnet), "%x%x%x%x",
365			q[0], q[1], q[2], q[3]);
366		for (p = cnet; *p == '0' && p < cnet + 8; p++)
367			continue;
368		net = p;
369	}
370
371	if (ipx_wildhost(work))
372		host = "any";
373	else if (ipx_nullhost(work))
374		host = "*";
375	else {
376		q = work.x_host.c_host;
377		snprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
378			q[0], q[1], q[2], q[3], q[4], q[5]);
379		for (p = chost; *p == '0' && p < chost + 12; p++)
380			continue;
381		host = p;
382	}
383
384	if (port) {
385		if (strcmp(host, "*") == 0) {
386			host = "";
387			snprintf(cport, sizeof(cport), "%x", port);
388		} else
389			snprintf(cport, sizeof(cport), ".%x", port);
390	} else
391		*cport = 0;
392
393	printf("%s.%s%s", net, host, cport);
394}
395