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arp.c (26516) arp.c (28679)
1/*
2 * sys-bsd.c - System-dependent procedures for setting up
3 * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
4 *
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 *
1/*
2 * sys-bsd.c - System-dependent procedures for setting up
3 * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
4 *
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 *
20 * $Id: arp.c,v 1.11 1997/04/15 00:03:35 brian Exp $
20 * $Id: arp.c,v 1.12 1997/06/09 03:27:11 brian Exp $
21 *
22 */
23
24/*
25 * TODO:
26 */
27
28#include <sys/ioctl.h>

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70
71
72#if RTM_VERSION >= 3
73
74/*
75 * sifproxyarp - Make a proxy ARP entry for the peer.
76 */
77static struct {
21 *
22 */
23
24/*
25 * TODO:
26 */
27
28#include <sys/ioctl.h>

--- 41 unchanged lines hidden (view full) ---

70
71
72#if RTM_VERSION >= 3
73
74/*
75 * sifproxyarp - Make a proxy ARP entry for the peer.
76 */
77static struct {
78 struct rt_msghdr hdr;
79 struct sockaddr_inarp dst;
80 struct sockaddr_dl hwa;
81 char extra[128];
82} arpmsg;
78 struct rt_msghdr hdr;
79 struct sockaddr_inarp dst;
80 struct sockaddr_dl hwa;
81 char extra[128];
82} arpmsg;
83
84static int arpmsg_valid;
85
86int
83
84static int arpmsg_valid;
85
86int
87sifproxyarp(unit, hisaddr)
88 int unit;
89 u_long hisaddr;
87sifproxyarp(int unit, u_long hisaddr)
90{
88{
91 int routes;
89 int routes;
92
90
93 /*
94 * Get the hardware address of an interface on the same subnet
95 * as our local address.
96 */
97 memset(&arpmsg, 0, sizeof(arpmsg));
98 if (!get_ether_addr(unit, hisaddr, &arpmsg.hwa)) {
99 LogPrintf(LogERROR, "Cannot determine ethernet address"
100 " for proxy ARP\n");
101 return 0;
102 }
91 /*
92 * Get the hardware address of an interface on the same subnet as our local
93 * address.
94 */
95 memset(&arpmsg, 0, sizeof(arpmsg));
96 if (!get_ether_addr(unit, hisaddr, &arpmsg.hwa)) {
97 LogPrintf(LogERROR, "Cannot determine ethernet address"
98 " for proxy ARP\n");
99 return 0;
100 }
101 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
102 LogPrintf(LogERROR, "sifproxyarp: opening routing socket: %s\n",
103 strerror(errno));
104 return 0;
105 }
106 arpmsg.hdr.rtm_type = RTM_ADD;
107 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
108 arpmsg.hdr.rtm_version = RTM_VERSION;
109 arpmsg.hdr.rtm_seq = ++rtm_seq;
110 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
111 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
112 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
113 arpmsg.dst.sin_family = AF_INET;
114 arpmsg.dst.sin_addr.s_addr = hisaddr;
115 arpmsg.dst.sin_other = SIN_PROXY;
103
116
104 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
105 LogPrintf(LogERROR, "sifproxyarp: opening routing socket: %s\n",
106 strerror(errno));
107 return 0;
108 }
109
110 arpmsg.hdr.rtm_type = RTM_ADD;
111 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
112 arpmsg.hdr.rtm_version = RTM_VERSION;
113 arpmsg.hdr.rtm_seq = ++rtm_seq;
114 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
115 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
116 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
117 arpmsg.dst.sin_family = AF_INET;
118 arpmsg.dst.sin_addr.s_addr = hisaddr;
119 arpmsg.dst.sin_other = SIN_PROXY;
120
121 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
122 + arpmsg.hwa.sdl_len;
123 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
124 LogPrintf(LogERROR, "Add proxy arp entry: %s\n", strerror(errno));
125 close(routes);
126 return 0;
127 }
128
117 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
118 + arpmsg.hwa.sdl_len;
119 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
120 LogPrintf(LogERROR, "Add proxy arp entry: %s\n", strerror(errno));
129 close(routes);
121 close(routes);
130 arpmsg_valid = 1;
131 return 1;
122 return 0;
123 }
124 close(routes);
125 arpmsg_valid = 1;
126 return 1;
132}
133
134/*
135 * cifproxyarp - Delete the proxy ARP entry for the peer.
136 */
137int
127}
128
129/*
130 * cifproxyarp - Delete the proxy ARP entry for the peer.
131 */
132int
138cifproxyarp(unit, hisaddr)
139 int unit;
140 u_long hisaddr;
133cifproxyarp(int unit, u_long hisaddr)
141{
134{
142 int routes;
135 int routes;
143
136
144 if (!arpmsg_valid)
145 return 0;
146 arpmsg_valid = 0;
137 if (!arpmsg_valid)
138 return 0;
139 arpmsg_valid = 0;
147
140
148 arpmsg.hdr.rtm_type = RTM_DELETE;
149 arpmsg.hdr.rtm_seq = ++rtm_seq;
141 arpmsg.hdr.rtm_type = RTM_DELETE;
142 arpmsg.hdr.rtm_seq = ++rtm_seq;
150
143
151 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
152 LogPrintf(LogERROR, "sifproxyarp: opening routing socket: %s\n",
153 strerror(errno));
154 return 0;
155 }
156
157 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
158 LogPrintf(LogERROR, "Delete proxy arp entry: %s\n", strerror(errno));
159 close(routes);
160 return 0;
161 }
162
144 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
145 LogPrintf(LogERROR, "sifproxyarp: opening routing socket: %s\n",
146 strerror(errno));
147 return 0;
148 }
149 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
150 LogPrintf(LogERROR, "Delete proxy arp entry: %s\n", strerror(errno));
163 close(routes);
151 close(routes);
164 return 1;
152 return 0;
153 }
154 close(routes);
155 return 1;
165}
166
156}
157
167#else /* RTM_VERSION */
158#else /* RTM_VERSION */
168
169/*
170 * sifproxyarp - Make a proxy ARP entry for the peer.
171 */
172int
159
160/*
161 * sifproxyarp - Make a proxy ARP entry for the peer.
162 */
163int
173sifproxyarp(unit, hisaddr)
174 int unit;
175 u_long hisaddr;
164sifproxyarp(int unit, u_long hisaddr)
176{
165{
177 struct arpreq arpreq;
178 struct {
179 struct sockaddr_dl sdl;
180 char space[128];
181 } dls;
166 struct arpreq arpreq;
167 struct {
168 struct sockaddr_dl sdl;
169 char space[128];
170 } dls;
182
171
183 BZERO(&arpreq, sizeof(arpreq));
172 BZERO(&arpreq, sizeof(arpreq));
184
173
185 /*
186 * Get the hardware address of an interface on the same subnet
187 * as our local address.
188 */
189 if (!get_ether_addr(unit, hisaddr, &dls.sdl)) {
190 LogPrintf(LOG_PHASE_BIT, "Cannot determine ethernet address for proxy ARP\n");
191 return 0;
192 }
193
194 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
195 arpreq.arp_ha.sa_family = AF_UNSPEC;
196 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
197 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
198 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
199 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
200 if (ioctl(unit, SIOCSARP, (caddr_t)&arpreq) < 0) {
201 LogPrintf(LogERROR, "sifproxyarp: ioctl(SIOCSARP): \n");
202 return 0;
203 }
204
205 return 1;
174 /*
175 * Get the hardware address of an interface on the same subnet as our local
176 * address.
177 */
178 if (!get_ether_addr(unit, hisaddr, &dls.sdl)) {
179 LogPrintf(LOG_PHASE_BIT, "Cannot determine ethernet address for proxy ARP\n");
180 return 0;
181 }
182 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
183 arpreq.arp_ha.sa_family = AF_UNSPEC;
184 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
185 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
186 ((struct sockaddr_in *) & arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
187 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
188 if (ioctl(unit, SIOCSARP, (caddr_t) & arpreq) < 0) {
189 LogPrintf(LogERROR, "sifproxyarp: ioctl(SIOCSARP): \n");
190 return 0;
191 }
192 return 1;
206}
207
208/*
209 * cifproxyarp - Delete the proxy ARP entry for the peer.
210 */
211int
193}
194
195/*
196 * cifproxyarp - Delete the proxy ARP entry for the peer.
197 */
198int
212cifproxyarp(unit, hisaddr)
213 int unit;
214 u_long hisaddr;
199cifproxyarp(int unit, u_long hisaddr)
215{
200{
216 struct arpreq arpreq;
201 struct arpreq arpreq;
217
202
218 BZERO(&arpreq, sizeof(arpreq));
219 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
220 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
221 if (ioctl(unit, SIOCDARP, (caddr_t)&arpreq) < 0) {
222 LogPrintf(LogERROR, "cifproxyarp: ioctl(SIOCDARP): \n");
223 return 0;
224 }
225 return 1;
203 BZERO(&arpreq, sizeof(arpreq));
204 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
205 ((struct sockaddr_in *) & arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
206 if (ioctl(unit, SIOCDARP, (caddr_t) & arpreq) < 0) {
207 LogPrintf(LogERROR, "cifproxyarp: ioctl(SIOCDARP): \n");
208 return 0;
209 }
210 return 1;
226}
211}
227#endif /* RTM_VERSION */
228
212
213#endif /* RTM_VERSION */
229
214
215
230/*
231 * get_ether_addr - get the hardware address of an interface on the
232 * the same subnet as ipaddr.
233 */
234#define MAX_IFS 32
235
236int
216/*
217 * get_ether_addr - get the hardware address of an interface on the
218 * the same subnet as ipaddr.
219 */
220#define MAX_IFS 32
221
222int
237get_ether_addr(s, ipaddr, hwaddr)
238 int s;
239 u_long ipaddr;
240 struct sockaddr_dl *hwaddr;
223get_ether_addr(int s, u_long ipaddr, struct sockaddr_dl * hwaddr)
241{
224{
242 struct ifreq *ifr, *ifend, *ifp;
243 u_long ina, mask;
244 struct sockaddr_dl *dla;
245 struct ifreq ifreq;
246 struct ifconf ifc;
247 struct ifreq ifs[MAX_IFS];
225 struct ifreq *ifr, *ifend, *ifp;
226 u_long ina, mask;
227 struct sockaddr_dl *dla;
228 struct ifreq ifreq;
229 struct ifconf ifc;
230 struct ifreq ifs[MAX_IFS];
248
231
249 ifc.ifc_len = sizeof(ifs);
250 ifc.ifc_req = ifs;
251 if (ioctl(s, SIOCGIFCONF, &ifc) < 0) {
252 LogPrintf(LogERROR, "get_ether_addr: ioctl(SIOCGIFCONF): \n");
253 return 0;
254 }
232 ifc.ifc_len = sizeof(ifs);
233 ifc.ifc_req = ifs;
234 if (ioctl(s, SIOCGIFCONF, &ifc) < 0) {
235 LogPrintf(LogERROR, "get_ether_addr: ioctl(SIOCGIFCONF): \n");
236 return 0;
237 }
255
238
256 /*
257 * Scan through looking for an interface with an Internet
258 * address on the same subnet as `ipaddr'.
259 */
260 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
261 for (ifr = ifc.ifc_req; ifr < ifend; ) {
262 if (ifr->ifr_addr.sa_family == AF_INET) {
263 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
264 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
265 ifreq.ifr_name[sizeof(ifreq.ifr_name)-1]='\0';
266 /*
267 * Check that the interface is up, and not point-to-point
268 * or loopback.
269 */
270 if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0)
271 continue;
272 if ((ifreq.ifr_flags &
273 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
274 != (IFF_UP|IFF_BROADCAST))
275 goto nextif;
276 /*
277 * Get its netmask and check that it's on the right subnet.
278 */
279 if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0)
280 continue;
281 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
282 if ((ipaddr & mask) != (ina & mask))
283 goto nextif;
239 /*
240 * Scan through looking for an interface with an Internet address on the
241 * same subnet as `ipaddr'.
242 */
243 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
244 for (ifr = ifc.ifc_req; ifr < ifend;) {
245 if (ifr->ifr_addr.sa_family == AF_INET) {
246 ina = ((struct sockaddr_in *) & ifr->ifr_addr)->sin_addr.s_addr;
247 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
248 ifreq.ifr_name[sizeof(ifreq.ifr_name) - 1] = '\0';
284
249
285 break;
286 }
287nextif:
288 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
250 /*
251 * Check that the interface is up, and not point-to-point or loopback.
252 */
253 if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0)
254 continue;
255 if ((ifreq.ifr_flags &
256 (IFF_UP | IFF_BROADCAST | IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP))
257 != (IFF_UP | IFF_BROADCAST))
258 goto nextif;
259
260 /*
261 * Get its netmask and check that it's on the right subnet.
262 */
263 if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0)
264 continue;
265 mask = ((struct sockaddr_in *) & ifreq.ifr_addr)->sin_addr.s_addr;
266 if ((ipaddr & mask) != (ina & mask))
267 goto nextif;
268
269 break;
289 }
270 }
271nextif:
272 ifr = (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
273 }
290
274
291 if (ifr >= ifend)
292 return 0;
293 LogPrintf(LogPHASE, "Found interface %s for proxy arp\n", ifr->ifr_name);
275 if (ifr >= ifend)
276 return 0;
277 LogPrintf(LogPHASE, "Found interface %s for proxy arp\n", ifr->ifr_name);
294
278
295 /*
296 * Now scan through again looking for a link-level address
297 * for this interface.
298 */
299 ifp = ifr;
300 for (ifr = ifc.ifc_req; ifr < ifend; ) {
301 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
302 && ifr->ifr_addr.sa_family == AF_LINK) {
303 /*
304 * Found the link-level address - copy it out
305 */
306 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
279 /*
280 * Now scan through again looking for a link-level address for this
281 * interface.
282 */
283 ifp = ifr;
284 for (ifr = ifc.ifc_req; ifr < ifend;) {
285 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
286 && ifr->ifr_addr.sa_family == AF_LINK) {
287
288 /*
289 * Found the link-level address - copy it out
290 */
291 dla = (struct sockaddr_dl *) & ifr->ifr_addr;
307#ifdef __bsdi__
292#ifdef __bsdi__
308 if (dla->sdl_alen == 0)
309 kmemgetether(ifr->ifr_name, dla);
293 if (dla->sdl_alen == 0)
294 kmemgetether(ifr->ifr_name, dla);
310#endif
295#endif
311 BCOPY(dla, hwaddr, dla->sdl_len);
312 return 1;
313 }
314 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
296 BCOPY(dla, hwaddr, dla->sdl_len);
297 return 1;
315 }
298 }
299 ifr = (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
300 }
316
301
317 return 0;
302 return 0;
318}
319
320#ifdef __bsdi__
321#include <nlist.h>
322
323struct nlist nl[] = {
324#define N_IFNET 0
303}
304
305#ifdef __bsdi__
306#include <nlist.h>
307
308struct nlist nl[] = {
309#define N_IFNET 0
325 { "_ifnet" },
326 "",
310 {"_ifnet"},
311 "",
327};
328
329
330kvm_t *kvmd;
331
332/*
333 * Read kernel memory, return 0 on success.
334 */
335int
312};
313
314
315kvm_t *kvmd;
316
317/*
318 * Read kernel memory, return 0 on success.
319 */
320int
336kread(addr, buf, size)
337 u_long addr;
338 char *buf;
339 int size;
321kread(u_long addr, char *buf, int size)
340{
341 if (kvm_read(kvmd, addr, buf, size) != size) {
342 /* XXX this duplicates kvm_read's error printout */
343 LogPrintf(LogERROR, "kvm_read %s\n", kvm_geterr(kvmd));
344 return -1;
345 }
346 return 0;
347}
348
322{
323 if (kvm_read(kvmd, addr, buf, size) != size) {
324 /* XXX this duplicates kvm_read's error printout */
325 LogPrintf(LogERROR, "kvm_read %s\n", kvm_geterr(kvmd));
326 return -1;
327 }
328 return 0;
329}
330
349kmemgetether(ifname, dlo)
350char *ifname;
351struct sockaddr_dl *dlo;
331void
332kmemgetether(char *ifname, struct sockaddr_dl * dlo)
352{
353 struct ifnet ifnet;
354 int n;
355 u_long addr, ifaddraddr, ifnetfound, ifaddrfound;
333{
334 struct ifnet ifnet;
335 int n;
336 u_long addr, ifaddraddr, ifnetfound, ifaddrfound;
356 char name[16+32];
337 char name[16 + 32];
357 struct sockaddr *sa;
358 char *cp;
359 struct sockaddr_dl *sdl;
360 union {
338 struct sockaddr *sa;
339 char *cp;
340 struct sockaddr_dl *sdl;
341 union {
361 struct ifaddr ifa;
362 struct in_ifaddr in;
363 } ifaddr;
342 struct ifaddr ifa;
343 struct in_ifaddr in;
344 } ifaddr;
364 struct arpcom ac;
365
366 kvmd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
367 if (kvmd) {
368 n = kvm_nlist(kvmd, nl);
369 if (n >= 0) {
370 addr = nl[N_IFNET].n_value;
345 struct arpcom ac;
346
347 kvmd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
348 if (kvmd) {
349 n = kvm_nlist(kvmd, nl);
350 if (n >= 0) {
351 addr = nl[N_IFNET].n_value;
371 kread(addr, (char *)&addr, sizeof(addr));
352 kread(addr, (char *) &addr, sizeof(addr));
372 ifaddraddr = ifnetfound = 0;
373 while (addr || ifaddraddr) {
374 ifnetfound = addr;
375 if (ifaddraddr == 0) {
353 ifaddraddr = ifnetfound = 0;
354 while (addr || ifaddraddr) {
355 ifnetfound = addr;
356 if (ifaddraddr == 0) {
376 if (kread(addr, (char *)&ifnet, sizeof(ifnet)) ||
377 kread((u_long)ifnet.if_name, name, 16))
378 return;
357 if (kread(addr, (char *) &ifnet, sizeof(ifnet)) ||
358 kread((u_long) ifnet.if_name, name, 16))
359 return;
379 name[15] = 0;
380 addr = (u_long) ifnet.if_next;
360 name[15] = 0;
361 addr = (u_long) ifnet.if_next;
381 cp = (char *)index(name, '\0');
362 cp = (char *) index(name, '\0');
382 cp += sprintf(cp, "%d", ifnet.if_unit);
383 *cp = '\0';
363 cp += sprintf(cp, "%d", ifnet.if_unit);
364 *cp = '\0';
384 ifaddraddr = (u_long)ifnet.if_addrlist;
365 ifaddraddr = (u_long) ifnet.if_addrlist;
385 }
386 ifaddrfound = ifaddraddr;
387 if (ifaddraddr) {
366 }
367 ifaddrfound = ifaddraddr;
368 if (ifaddraddr) {
388 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
369 if (kread(ifaddraddr, (char *) &ifaddr, sizeof ifaddr)) {
389 ifaddraddr = 0;
390 continue;
391 }
392#define CP(x) ((char *)(x))
393 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + CP(&ifaddr);
370 ifaddraddr = 0;
371 continue;
372 }
373#define CP(x) ((char *)(x))
374 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + CP(&ifaddr);
394 sa = (struct sockaddr *)cp;
375 sa = (struct sockaddr *) cp;
395 if (sa->sa_family == AF_LINK && strcmp(ifname, name) == 0) {
376 if (sa->sa_family == AF_LINK && strcmp(ifname, name) == 0) {
396 sdl = (struct sockaddr_dl *)sa;
397 cp = (char *)LLADDR(sdl);
377 sdl = (struct sockaddr_dl *) sa;
378 cp = (char *) LLADDR(sdl);
398 n = sdl->sdl_alen;
399 if (ifnet.if_type == IFT_ETHER) {
379 n = sdl->sdl_alen;
380 if (ifnet.if_type == IFT_ETHER) {
400 if (n == 0) {
401 kread(ifnetfound, (char *)&ac, sizeof(ac));
402 cp = (char *)LLADDR(sdl);
403 bcopy((char *)ac.ac_enaddr, cp, 6);
404 sdl->sdl_alen = 6;
405 }
406 bcopy(sdl, dlo, sizeof(*sdl));
407 return;
381 if (n == 0) {
382 kread(ifnetfound, (char *) &ac, sizeof(ac));
383 cp = (char *) LLADDR(sdl);
384 bcopy((char *) ac.ac_enaddr, cp, 6);
385 sdl->sdl_alen = 6;
386 }
387 bcopy(sdl, dlo, sizeof(*sdl));
388 return;
408 }
409 }
389 }
390 }
410 ifaddraddr = (u_long)ifaddr.ifa.ifa_next;
391 ifaddraddr = (u_long) ifaddr.ifa.ifa_next;
411 }
412 }
413 }
414 }
415}
392 }
393 }
394 }
395 }
396}
397
416#endif
417
418#ifdef DEBUG
419main()
420{
398#endif
399
400#ifdef DEBUG
401main()
402{
421 u_long ipaddr;
422 int s;
403 u_long ipaddr;
404 int s;
423
405
424 s = socket(AF_INET, SOCK_DGRAM, 0);
425 ipaddr = inet_addr("192.168.1.32");
426 sifproxyarp(s, ipaddr);
427 close(s);
406 s = socket(AF_INET, SOCK_DGRAM, 0);
407 ipaddr = inet_addr("192.168.1.32");
408 sifproxyarp(s, ipaddr);
409 close(s);
428}
410}
411
429#endif
412#endif