1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
|
/* $OpenBSD: if.c,v 1.21 1999/08/08 14:59:02 niklas Exp $ */
/* $NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if.c 8.3 (Berkeley) 1/4/94
*/
#include "bpfilter.h"
#include "bridge.h"
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/radix.h>
#include <net/route.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/igmp.h>
#ifdef MROUTING
#include <netinet/ip_mroute.h>
#endif
#endif
#ifdef IPFILTER
#include <netinet/ip_fil_compat.h>
#include <netinet/ip_fil.h>
#include <netinet/ip_nat.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#if NBRIDGE > 0
#include <net/if_bridge.h>
#endif
void if_attachsetup __P((struct ifnet *));
int if_detach_rtdelete __P((struct radix_node *, void *));
int ifqmaxlen = IFQ_MAXLEN;
void if_slowtimo __P((void *arg));
/*
* Network interface utility routines.
*
* Routines with ifa_ifwith* names take sockaddr *'s as
* parameters.
*/
void
ifinit()
{
register struct ifnet *ifp;
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
if (ifp->if_snd.ifq_maxlen == 0)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
if_slowtimo(NULL);
}
int if_index = 0;
struct ifaddr **ifnet_addrs;
/*
* Attach an interface to the
* list of "active" interfaces.
*/
void
if_attachsetup(ifp)
struct ifnet *ifp;
{
unsigned int socksize, ifasize;
int namelen, masklen;
register struct sockaddr_dl *sdl;
register struct ifaddr *ifa;
static int if_indexlim = 8;
ifp->if_index = ++if_index;
if (ifnet_addrs == 0 || if_index >= if_indexlim) {
unsigned int n = (if_indexlim <<= 1) * sizeof(ifa);
struct ifaddr **q = (struct ifaddr **)
malloc(n, M_IFADDR, M_WAITOK);
if (ifnet_addrs) {
bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
free((caddr_t)ifnet_addrs, M_IFADDR);
}
ifnet_addrs = q;
}
/*
* create a Link Level name for this device
*/
namelen = strlen(ifp->if_xname);
#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
socksize = masklen + ifp->if_addrlen;
#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
if (socksize < sizeof(*sdl))
socksize = sizeof(*sdl);
socksize = ROUNDUP(socksize);
ifasize = sizeof(*ifa) + 2 * socksize;
ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
bzero((caddr_t)ifa, ifasize);
sdl = (struct sockaddr_dl *)(ifa + 1);
sdl->sdl_len = socksize;
sdl->sdl_family = AF_LINK;
bcopy(ifp->if_xname, sdl->sdl_data, namelen);
sdl->sdl_nlen = namelen;
sdl->sdl_index = ifp->if_index;
sdl->sdl_type = ifp->if_type;
ifnet_addrs[if_index - 1] = ifa;
ifa->ifa_ifp = ifp;
ifa->ifa_rtrequest = link_rtrequest;
TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list);
ifa->ifa_addr = (struct sockaddr *)sdl;
sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
ifa->ifa_netmask = (struct sockaddr *)sdl;
sdl->sdl_len = masklen;
while (namelen != 0)
sdl->sdl_data[--namelen] = 0xff;
}
void
if_attachhead(ifp)
struct ifnet *ifp;
{
if (if_index == 0)
TAILQ_INIT(&ifnet);
TAILQ_INIT(&ifp->if_addrlist);
TAILQ_INSERT_HEAD(&ifnet, ifp, if_list);
if_attachsetup(ifp);
}
void
if_attach(ifp)
struct ifnet *ifp;
{
if (if_index == 0)
TAILQ_INIT(&ifnet);
TAILQ_INIT(&ifp->if_addrlist);
TAILQ_INSERT_TAIL(&ifnet, ifp, if_list);
if_attachsetup(ifp);
}
/*
* Delete a route if it has a specific interface for output.
* This function complies to the rn_walktree callback API.
*/
int
if_detach_rtdelete(rn, vifp)
struct radix_node *rn;
void *vifp;
{
struct ifnet *ifp = vifp;
struct rtentry *rt = (struct rtentry *)rn;
if (rt->rt_ifp == ifp)
rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt),
0, NULL);
/*
* XXX There should be no need to check for rt_ifa belonging to this
* interface, because then rt_ifp is set, right?
*/
return (0);
}
/*
* Detach an interface from everything in the kernel. Also deallocate
* private resources.
* XXX So far only the INET protocol family has been looked over
* wrt resource usage that needs to be decoupled.
*/
void
if_detach(ifp)
struct ifnet *ifp;
{
struct ifaddr *ifa;
int i, s = splimp();
struct radix_node_head *rnh;
#if NBRIDGE > 0
/* Remove the interface from any bridge it is part of. */
if (ifp->if_bridge)
bridge_ifdetach(ifp);
#endif
#if NBPFILTER > 0
/* If there is a bpf device attached, detach from it. */
if (ifp->if_bpf)
bpfdetach(ifp);
#endif
/*
* Find and remove all routes which is using this interface.
* XXX Factor out into a route.c function?
*/
for (i = 1; i <= AF_MAX; i++) {
rnh = rt_tables[i];
if (rnh)
(*rnh->rnh_walktree)(rnh, if_detach_rtdelete, ifp);
}
#ifdef INET
rti_delete(ifp);
myip_ifp = NULL;
#ifdef MROUTING
vif_delete(ifp);
#endif
#endif
#ifdef IPFILTER
/* XXX More ipf & ipnat cleanup needed. */
nat_ifdetach(ifp);
#endif
/*
* XXX transient ifp refs? inpcb.ip_moptions.imo_multicast_ifp?
* Other network stacks than INET?
*/
/* Remove the interface from the list of all interfaces. */
TAILQ_REMOVE(&ifnet, ifp, if_list);
/* Deallocate private resources. */
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa;
ifa = TAILQ_FIRST(&ifp->if_addrlist)) {
TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list);
#ifdef INET
if (ifa->ifa_addr->sa_family == AF_INET)
TAILQ_REMOVE(&in_ifaddr, (struct in_ifaddr *)ifa,
ia_list);
#endif
free(ifa, M_IFADDR);
}
splx(s);
}
/*
* Locate an interface based on a complete address.
*/
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithaddr(addr)
register struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
#define equal(a1, a2) \
(bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
if (ifa->ifa_addr->sa_family != addr->sa_family)
continue;
if (ifa->ifa_dstaddr == NULL)
continue;
if (equal(addr, ifa->ifa_addr))
return (ifa);
if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
equal(ifa->ifa_broadaddr, addr))
return (ifa);
}
return (NULL);
}
/*
* Locate the point to point interface with a given destination address.
*/
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithdstaddr(addr)
register struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
if (ifp->if_flags & IFF_POINTOPOINT)
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
if (ifa->ifa_addr->sa_family != addr->sa_family ||
ifa->ifa_dstaddr == NULL)
continue;
if (equal(addr, ifa->ifa_dstaddr))
return (ifa);
}
return (NULL);
}
/*
* Find an interface on a specific network. If many, choice
* is most specific found.
*/
struct ifaddr *
ifa_ifwithnet(addr)
struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
struct ifaddr *ifa_maybe = 0;
u_int af = addr->sa_family;
char *addr_data = addr->sa_data, *cplim;
if (af == AF_LINK) {
register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
if (sdl->sdl_index && sdl->sdl_index <= if_index)
return (ifnet_addrs[sdl->sdl_index - 1]);
}
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
register char *cp, *cp2, *cp3;
if (ifa->ifa_addr->sa_family != af ||
ifa->ifa_netmask == 0)
next: continue;
cp = addr_data;
cp2 = ifa->ifa_addr->sa_data;
cp3 = ifa->ifa_netmask->sa_data;
cplim = (char *)ifa->ifa_netmask +
ifa->ifa_netmask->sa_len;
while (cp3 < cplim)
if ((*cp++ ^ *cp2++) & *cp3++)
/* want to continue for() loop */
goto next;
if (ifa_maybe == 0 ||
rn_refines((caddr_t)ifa->ifa_netmask,
(caddr_t)ifa_maybe->ifa_netmask))
ifa_maybe = ifa;
}
return (ifa_maybe);
}
/*
* Find an interface using a specific address family
*/
struct ifaddr *
ifa_ifwithaf(af)
register int af;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next)
if (ifa->ifa_addr->sa_family == af)
return (ifa);
return (NULL);
}
/*
* Find an interface address specific to an interface best matching
* a given address.
*/
struct ifaddr *
ifaof_ifpforaddr(addr, ifp)
struct sockaddr *addr;
register struct ifnet *ifp;
{
register struct ifaddr *ifa;
register char *cp, *cp2, *cp3;
register char *cplim;
struct ifaddr *ifa_maybe = 0;
u_int af = addr->sa_family;
if (af >= AF_MAX)
return (NULL);
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
if (ifa->ifa_addr->sa_family != af)
continue;
ifa_maybe = ifa;
if (ifa->ifa_netmask == 0) {
if (equal(addr, ifa->ifa_addr) ||
(ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
return (ifa);
continue;
}
cp = addr->sa_data;
cp2 = ifa->ifa_addr->sa_data;
cp3 = ifa->ifa_netmask->sa_data;
cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
for (; cp3 < cplim; cp3++)
if ((*cp++ ^ *cp2++) & *cp3)
break;
if (cp3 == cplim)
return (ifa);
}
return (ifa_maybe);
}
/*
* Default action when installing a route with a Link Level gateway.
* Lookup an appropriate real ifa to point to.
* This should be moved to /sys/net/link.c eventually.
*/
void
link_rtrequest(cmd, rt, sa)
int cmd;
register struct rtentry *rt;
struct sockaddr *sa;
{
register struct ifaddr *ifa;
struct sockaddr *dst;
struct ifnet *ifp;
if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
return;
if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) {
IFAFREE(rt->rt_ifa);
rt->rt_ifa = ifa;
ifa->ifa_refcnt++;
if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
ifa->ifa_rtrequest(cmd, rt, sa);
}
}
/*
* Mark an interface down and notify protocols of
* the transition.
* NOTE: must be called at splsoftnet or equivalent.
*/
void
if_down(ifp)
register struct ifnet *ifp;
{
register struct ifaddr *ifa;
ifp->if_flags &= ~IFF_UP;
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next)
pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
if_qflush(&ifp->if_snd);
rt_ifmsg(ifp);
}
/*
* Mark an interface up and notify protocols of
* the transition.
* NOTE: must be called at splsoftnet or equivalent.
*/
void
if_up(ifp)
register struct ifnet *ifp;
{
#ifdef notyet
register struct ifaddr *ifa;
#endif
ifp->if_flags |= IFF_UP;
#ifdef notyet
/* this has no effect on IP, and will kill all ISO connections XXX */
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
ifa = ifa->ifa_list.tqe_next)
pfctlinput(PRC_IFUP, ifa->ifa_addr);
#endif
rt_ifmsg(ifp);
}
/*
* Flush an interface queue.
*/
void
if_qflush(ifq)
register struct ifqueue *ifq;
{
register struct mbuf *m, *n;
n = ifq->ifq_head;
while ((m = n) != NULL) {
n = m->m_act;
m_freem(m);
}
ifq->ifq_head = 0;
ifq->ifq_tail = 0;
ifq->ifq_len = 0;
}
/*
* Handle interface watchdog timer routines. Called
* from softclock, we decrement timers (if set) and
* call the appropriate interface routine on expiration.
*/
void
if_slowtimo(arg)
void *arg;
{
register struct ifnet *ifp;
int s = splimp();
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) {
if (ifp->if_timer == 0 || --ifp->if_timer)
continue;
if (ifp->if_watchdog)
(*ifp->if_watchdog)(ifp);
}
splx(s);
timeout(if_slowtimo, NULL, hz / IFNET_SLOWHZ);
}
/*
* Map interface name to
* interface structure pointer.
*/
struct ifnet *
ifunit(name)
register char *name;
{
register struct ifnet *ifp;
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
if (strcmp(ifp->if_xname, name) == 0)
return (ifp);
return (NULL);
}
/*
* Interface ioctls.
*/
int
ifioctl(so, cmd, data, p)
struct socket *so;
u_long cmd;
caddr_t data;
struct proc *p;
{
register struct ifnet *ifp;
register struct ifreq *ifr;
int error;
switch (cmd) {
case SIOCGIFCONF:
case OSIOCGIFCONF:
return (ifconf(cmd, data));
}
ifr = (struct ifreq *)data;
ifp = ifunit(ifr->ifr_name);
if (ifp == 0)
return (ENXIO);
switch (cmd) {
case SIOCGIFFLAGS:
ifr->ifr_flags = ifp->if_flags;
break;
case SIOCGIFMETRIC:
ifr->ifr_metric = ifp->if_metric;
break;
case SIOCGIFDATA:
error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data,
sizeof(ifp->if_data));
break;
case SIOCSIFFLAGS:
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
return (error);
if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
int s = splimp();
if_down(ifp);
splx(s);
}
if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
int s = splimp();
if_up(ifp);
splx(s);
}
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
(ifr->ifr_flags &~ IFF_CANTCHANGE);
if (ifp->if_ioctl)
(void) (*ifp->if_ioctl)(ifp, cmd, data);
break;
case SIOCSIFMETRIC:
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
return (error);
ifp->if_metric = ifr->ifr_metric;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
return (error);
if (ifp->if_ioctl == 0)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, data));
default:
if (so->so_proto == 0)
return (EOPNOTSUPP);
#if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4)
return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
(struct mbuf *) cmd, (struct mbuf *) data,
(struct mbuf *) ifp));
#else
{
int ocmd = cmd;
switch (cmd) {
case SIOCSIFADDR:
case SIOCSIFDSTADDR:
case SIOCSIFBRDADDR:
case SIOCSIFNETMASK:
#if BYTE_ORDER != BIG_ENDIAN
if (ifr->ifr_addr.sa_family == 0 &&
ifr->ifr_addr.sa_len < 16) {
ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
ifr->ifr_addr.sa_len = 16;
}
#else
if (ifr->ifr_addr.sa_len == 0)
ifr->ifr_addr.sa_len = 16;
#endif
break;
case OSIOCGIFADDR:
cmd = SIOCGIFADDR;
break;
case OSIOCGIFDSTADDR:
cmd = SIOCGIFDSTADDR;
break;
case OSIOCGIFBRDADDR:
cmd = SIOCGIFBRDADDR;
break;
case OSIOCGIFNETMASK:
cmd = SIOCGIFNETMASK;
}
error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
(struct mbuf *) cmd,
(struct mbuf *) data,
(struct mbuf *) ifp));
switch (ocmd) {
case OSIOCGIFADDR:
case OSIOCGIFDSTADDR:
case OSIOCGIFBRDADDR:
case OSIOCGIFNETMASK:
*(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
}
return (error);
}
#endif
}
return (0);
}
/*
* Return interface configuration
* of system. List may be used
* in later ioctl's (above) to get
* other information.
*/
/*ARGSUSED*/
int
ifconf(cmd, data)
u_long cmd;
caddr_t data;
{
register struct ifconf *ifc = (struct ifconf *)data;
register struct ifnet *ifp;
register struct ifaddr *ifa;
struct ifreq ifr, *ifrp;
int space = ifc->ifc_len, error = 0;
/* If ifc->ifc_len is 0, fill it in with the needed size and return. */
if (space == 0) {
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next) {
register struct sockaddr *sa;
if ((ifa = ifp->if_addrlist.tqh_first) == 0)
space += sizeof (ifr);
else
for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
sa = ifa->ifa_addr;
#if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4)
if (cmd != OSIOCGIFCONF)
#endif
if (sa->sa_len > sizeof(*sa))
space += sa->sa_len -
sizeof (*sa);
space += sizeof (ifr);
}
}
ifc->ifc_len = space;
return(0);
}
ifrp = ifc->ifc_req;
for (ifp = ifnet.tqh_first; space >= sizeof (ifr) && ifp != 0;
ifp = ifp->if_list.tqe_next) {
bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ);
if ((ifa = ifp->if_addrlist.tqh_first) == 0) {
bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof(ifr));
if (error)
break;
space -= sizeof (ifr), ifrp++;
} else
for (; space >= sizeof (ifr) && ifa != 0;
ifa = ifa->ifa_list.tqe_next) {
register struct sockaddr *sa = ifa->ifa_addr;
#if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4)
if (cmd == OSIOCGIFCONF) {
struct osockaddr *osa =
(struct osockaddr *)&ifr.ifr_addr;
ifr.ifr_addr = *sa;
osa->sa_family = sa->sa_family;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr));
ifrp++;
} else
#endif
if (sa->sa_len <= sizeof(*sa)) {
ifr.ifr_addr = *sa;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr));
ifrp++;
} else {
space -= sa->sa_len - sizeof(*sa);
if (space < sizeof (ifr))
break;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr.ifr_name));
if (error == 0)
error = copyout((caddr_t)sa,
(caddr_t)&ifrp->ifr_addr,
sa->sa_len);
ifrp = (struct ifreq *)(sa->sa_len +
(caddr_t)&ifrp->ifr_addr);
}
if (error)
break;
space -= sizeof (ifr);
}
}
ifc->ifc_len -= space;
return (error);
}
|