/
ipcp.c
1467 lines (1279 loc) · 42.6 KB
/
ipcp.c
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
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*-
* Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
* based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
* Internet Initiative Japan, Inc (IIJ)
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: src/usr.sbin/ppp/ipcp.c,v 1.90.2.12 2002/09/28 10:16:25 brian Exp $
* $DragonFly: src/usr.sbin/ppp/ipcp.c,v 1.2 2003/06/17 04:30:00 dillon Exp $
*/
#include <sys/param.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/route.h>
#include <netdb.h>
#include <sys/un.h>
#include <errno.h>
#include <fcntl.h>
#include <resolv.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <termios.h>
#include <unistd.h>
#ifndef NONAT
#ifdef LOCALNAT
#include "alias.h"
#else
#include <alias.h>
#endif
#endif
#include "layer.h"
#include "ua.h"
#include "defs.h"
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "timer.h"
#include "fsm.h"
#include "proto.h"
#include "iplist.h"
#include "throughput.h"
#include "slcompress.h"
#include "lqr.h"
#include "hdlc.h"
#include "lcp.h"
#include "ncpaddr.h"
#include "ip.h"
#include "ipcp.h"
#include "filter.h"
#include "descriptor.h"
#include "vjcomp.h"
#include "async.h"
#include "ccp.h"
#include "link.h"
#include "physical.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "ipv6cp.h"
#include "ncp.h"
#include "bundle.h"
#include "id.h"
#include "arp.h"
#include "systems.h"
#include "prompt.h"
#include "route.h"
#include "iface.h"
#undef REJECTED
#define REJECTED(p, x) ((p)->peer_reject & (1<<(x)))
#define issep(ch) ((ch) == ' ' || (ch) == '\t')
#define isip(ch) (((ch) >= '0' && (ch) <= '9') || (ch) == '.')
struct compreq {
u_short proto;
u_char slots;
u_char compcid;
};
static int IpcpLayerUp(struct fsm *);
static void IpcpLayerDown(struct fsm *);
static void IpcpLayerStart(struct fsm *);
static void IpcpLayerFinish(struct fsm *);
static void IpcpInitRestartCounter(struct fsm *, int);
static void IpcpSendConfigReq(struct fsm *);
static void IpcpSentTerminateReq(struct fsm *);
static void IpcpSendTerminateAck(struct fsm *, u_char);
static void IpcpDecodeConfig(struct fsm *, u_char *, u_char *, int,
struct fsm_decode *);
static struct fsm_callbacks ipcp_Callbacks = {
IpcpLayerUp,
IpcpLayerDown,
IpcpLayerStart,
IpcpLayerFinish,
IpcpInitRestartCounter,
IpcpSendConfigReq,
IpcpSentTerminateReq,
IpcpSendTerminateAck,
IpcpDecodeConfig,
fsm_NullRecvResetReq,
fsm_NullRecvResetAck
};
static const char *
protoname(int proto)
{
static struct {
int id;
const char *txt;
} cftypes[] = {
/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
{ 1, "IPADDRS" }, /* IP-Addresses */ /* deprecated */
{ 2, "COMPPROTO" }, /* IP-Compression-Protocol */
{ 3, "IPADDR" }, /* IP-Address */
{ 129, "PRIDNS" }, /* 129: Primary DNS Server Address */
{ 130, "PRINBNS" }, /* 130: Primary NBNS Server Address */
{ 131, "SECDNS" }, /* 131: Secondary DNS Server Address */
{ 132, "SECNBNS" } /* 132: Secondary NBNS Server Address */
};
unsigned f;
for (f = 0; f < sizeof cftypes / sizeof *cftypes; f++)
if (cftypes[f].id == proto)
return cftypes[f].txt;
return NumStr(proto, NULL, 0);
}
void
ipcp_AddInOctets(struct ipcp *ipcp, int n)
{
throughput_addin(&ipcp->throughput, n);
}
void
ipcp_AddOutOctets(struct ipcp *ipcp, int n)
{
throughput_addout(&ipcp->throughput, n);
}
void
ipcp_LoadDNS(struct ipcp *ipcp)
{
int fd;
ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr = INADDR_NONE;
if (ipcp->ns.resolv != NULL) {
free(ipcp->ns.resolv);
ipcp->ns.resolv = NULL;
}
if (ipcp->ns.resolv_nons != NULL) {
free(ipcp->ns.resolv_nons);
ipcp->ns.resolv_nons = NULL;
}
ipcp->ns.resolver = 0;
if ((fd = open(_PATH_RESCONF, O_RDONLY)) != -1) {
struct stat st;
if (fstat(fd, &st) == 0) {
ssize_t got;
if ((ipcp->ns.resolv_nons = (char *)malloc(st.st_size + 1)) == NULL)
log_Printf(LogERROR, "Failed to malloc %lu for %s: %s\n",
(unsigned long)st.st_size, _PATH_RESCONF, strerror(errno));
else if ((ipcp->ns.resolv = (char *)malloc(st.st_size + 1)) == NULL) {
log_Printf(LogERROR, "Failed(2) to malloc %lu for %s: %s\n",
(unsigned long)st.st_size, _PATH_RESCONF, strerror(errno));
free(ipcp->ns.resolv_nons);
ipcp->ns.resolv_nons = NULL;
} else if ((got = read(fd, ipcp->ns.resolv, st.st_size)) != st.st_size) {
if (got == -1)
log_Printf(LogERROR, "Failed to read %s: %s\n",
_PATH_RESCONF, strerror(errno));
else
log_Printf(LogERROR, "Failed to read %s, got %lu not %lu\n",
_PATH_RESCONF, (unsigned long)got,
(unsigned long)st.st_size);
free(ipcp->ns.resolv_nons);
ipcp->ns.resolv_nons = NULL;
free(ipcp->ns.resolv);
ipcp->ns.resolv = NULL;
} else {
char *cp, *cp_nons, *ncp, ch;
int n;
ipcp->ns.resolv[st.st_size] = '\0';
ipcp->ns.resolver = 1;
cp_nons = ipcp->ns.resolv_nons;
cp = ipcp->ns.resolv;
n = 0;
while ((ncp = strstr(cp, "nameserver")) != NULL) {
if (ncp != cp) {
memcpy(cp_nons, cp, ncp - cp);
cp_nons += ncp - cp;
}
if ((ncp != cp && ncp[-1] != '\n') || !issep(ncp[10])) {
memcpy(cp_nons, ncp, 9);
cp_nons += 9;
cp = ncp + 9; /* Can't match "nameserver" at cp... */
continue;
}
for (cp = ncp + 11; issep(*cp); cp++) /* Skip whitespace */
;
for (ncp = cp; isip(*ncp); ncp++) /* Jump over IP */
;
ch = *ncp;
*ncp = '\0';
if (n < 2 && inet_aton(cp, ipcp->ns.dns))
n++;
*ncp = ch;
if ((cp = strchr(ncp, '\n')) == NULL) /* Point at next line */
cp = ncp + strlen(ncp);
else
cp++;
}
strcpy(cp_nons, cp); /* Copy the end - including the NUL */
cp_nons += strlen(cp_nons) - 1;
while (cp_nons >= ipcp->ns.resolv_nons && *cp_nons == '\n')
*cp_nons-- = '\0';
if (n == 2 && ipcp->ns.dns[0].s_addr == INADDR_ANY) {
ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr;
ipcp->ns.dns[1].s_addr = INADDR_ANY;
}
bundle_AdjustDNS(ipcp->fsm.bundle);
}
} else
log_Printf(LogERROR, "Failed to stat opened %s: %s\n",
_PATH_RESCONF, strerror(errno));
close(fd);
}
}
int
ipcp_WriteDNS(struct ipcp *ipcp)
{
const char *paddr;
mode_t mask;
FILE *fp;
if (ipcp->ns.dns[0].s_addr == INADDR_ANY &&
ipcp->ns.dns[1].s_addr == INADDR_ANY) {
log_Printf(LogIPCP, "%s not modified: All nameservers NAKd\n",
_PATH_RESCONF);
return 0;
}
if (ipcp->ns.dns[0].s_addr == INADDR_ANY) {
ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr;
ipcp->ns.dns[1].s_addr = INADDR_ANY;
}
mask = umask(022);
if ((fp = ID0fopen(_PATH_RESCONF, "w")) != NULL) {
umask(mask);
if (ipcp->ns.resolv_nons)
fputs(ipcp->ns.resolv_nons, fp);
paddr = inet_ntoa(ipcp->ns.dns[0]);
log_Printf(LogIPCP, "Primary nameserver set to %s\n", paddr);
fprintf(fp, "\nnameserver %s\n", paddr);
if (ipcp->ns.dns[1].s_addr != INADDR_ANY &&
ipcp->ns.dns[1].s_addr != INADDR_NONE &&
ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) {
paddr = inet_ntoa(ipcp->ns.dns[1]);
log_Printf(LogIPCP, "Secondary nameserver set to %s\n", paddr);
fprintf(fp, "nameserver %s\n", paddr);
}
if (fclose(fp) == EOF) {
log_Printf(LogERROR, "write(): Failed updating %s: %s\n", _PATH_RESCONF,
strerror(errno));
return 0;
}
} else
umask(mask);
return 1;
}
void
ipcp_RestoreDNS(struct ipcp *ipcp)
{
if (ipcp->ns.resolver) {
ssize_t got, len;
int fd;
if ((fd = ID0open(_PATH_RESCONF, O_WRONLY|O_TRUNC, 0644)) != -1) {
len = strlen(ipcp->ns.resolv);
if ((got = write(fd, ipcp->ns.resolv, len)) != len) {
if (got == -1)
log_Printf(LogERROR, "Failed rewriting %s: write: %s\n",
_PATH_RESCONF, strerror(errno));
else
log_Printf(LogERROR, "Failed rewriting %s: wrote %ld of %ld\n",
_PATH_RESCONF, (long)got, (long)len);
}
close(fd);
} else
log_Printf(LogERROR, "Failed rewriting %s: open: %s\n", _PATH_RESCONF,
strerror(errno));
} else if (remove(_PATH_RESCONF) == -1)
log_Printf(LogERROR, "Failed removing %s: %s\n", _PATH_RESCONF,
strerror(errno));
}
int
ipcp_Show(struct cmdargs const *arg)
{
struct ipcp *ipcp = &arg->bundle->ncp.ipcp;
prompt_Printf(arg->prompt, "%s [%s]\n", ipcp->fsm.name,
State2Nam(ipcp->fsm.state));
if (ipcp->fsm.state == ST_OPENED) {
prompt_Printf(arg->prompt, " His side: %s, %s\n",
inet_ntoa(ipcp->peer_ip), vj2asc(ipcp->peer_compproto));
prompt_Printf(arg->prompt, " My side: %s, %s\n",
inet_ntoa(ipcp->my_ip), vj2asc(ipcp->my_compproto));
prompt_Printf(arg->prompt, " Queued packets: %lu\n",
(unsigned long)ipcp_QueueLen(ipcp));
}
prompt_Printf(arg->prompt, "\nDefaults:\n");
prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config"
" REQ%s, %u Term REQ%s\n", ipcp->cfg.fsm.timeout,
ipcp->cfg.fsm.maxreq, ipcp->cfg.fsm.maxreq == 1 ? "" : "s",
ipcp->cfg.fsm.maxtrm, ipcp->cfg.fsm.maxtrm == 1 ? "" : "s");
prompt_Printf(arg->prompt, " My Address: %s\n",
ncprange_ntoa(&ipcp->cfg.my_range));
if (ipcp->cfg.HaveTriggerAddress)
prompt_Printf(arg->prompt, " Trigger address: %s\n",
inet_ntoa(ipcp->cfg.TriggerAddress));
prompt_Printf(arg->prompt, " VJ compression: %s (%d slots %s slot "
"compression)\n", command_ShowNegval(ipcp->cfg.vj.neg),
ipcp->cfg.vj.slots, ipcp->cfg.vj.slotcomp ? "with" : "without");
if (iplist_isvalid(&ipcp->cfg.peer_list))
prompt_Printf(arg->prompt, " His Address: %s\n",
ipcp->cfg.peer_list.src);
else
prompt_Printf(arg->prompt, " His Address: %s\n",
ncprange_ntoa(&ipcp->cfg.peer_range));
prompt_Printf(arg->prompt, " DNS: %s",
ipcp->cfg.ns.dns[0].s_addr == INADDR_NONE ?
"none" : inet_ntoa(ipcp->cfg.ns.dns[0]));
if (ipcp->cfg.ns.dns[1].s_addr != INADDR_NONE)
prompt_Printf(arg->prompt, ", %s",
inet_ntoa(ipcp->cfg.ns.dns[1]));
prompt_Printf(arg->prompt, ", %s\n",
command_ShowNegval(ipcp->cfg.ns.dns_neg));
prompt_Printf(arg->prompt, " Resolver DNS: %s",
ipcp->ns.dns[0].s_addr == INADDR_NONE ?
"none" : inet_ntoa(ipcp->ns.dns[0]));
if (ipcp->ns.dns[1].s_addr != INADDR_NONE &&
ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr)
prompt_Printf(arg->prompt, ", %s",
inet_ntoa(ipcp->ns.dns[1]));
prompt_Printf(arg->prompt, "\n NetBIOS NS: %s, ",
inet_ntoa(ipcp->cfg.ns.nbns[0]));
prompt_Printf(arg->prompt, "%s\n\n",
inet_ntoa(ipcp->cfg.ns.nbns[1]));
throughput_disp(&ipcp->throughput, arg->prompt);
return 0;
}
int
ipcp_vjset(struct cmdargs const *arg)
{
if (arg->argc != arg->argn+2)
return -1;
if (!strcasecmp(arg->argv[arg->argn], "slots")) {
int slots;
slots = atoi(arg->argv[arg->argn+1]);
if (slots < 4 || slots > 16)
return 1;
arg->bundle->ncp.ipcp.cfg.vj.slots = slots;
return 0;
} else if (!strcasecmp(arg->argv[arg->argn], "slotcomp")) {
if (!strcasecmp(arg->argv[arg->argn+1], "on"))
arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 1;
else if (!strcasecmp(arg->argv[arg->argn+1], "off"))
arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 0;
else
return 2;
return 0;
}
return -1;
}
void
ipcp_Init(struct ipcp *ipcp, struct bundle *bundle, struct link *l,
const struct fsm_parent *parent)
{
struct hostent *hp;
struct in_addr host;
char name[MAXHOSTNAMELEN];
static const char * const timer_names[] =
{"IPCP restart", "IPCP openmode", "IPCP stopped"};
fsm_Init(&ipcp->fsm, "IPCP", PROTO_IPCP, 1, IPCP_MAXCODE, LogIPCP,
bundle, l, parent, &ipcp_Callbacks, timer_names);
ipcp->cfg.vj.slots = DEF_VJ_STATES;
ipcp->cfg.vj.slotcomp = 1;
memset(&ipcp->cfg.my_range, '\0', sizeof ipcp->cfg.my_range);
host.s_addr = htonl(INADDR_LOOPBACK);
ipcp->cfg.netmask.s_addr = INADDR_ANY;
if (gethostname(name, sizeof name) == 0) {
hp = gethostbyname(name);
if (hp && hp->h_addrtype == AF_INET && hp->h_length == sizeof host.s_addr)
memcpy(&host.s_addr, hp->h_addr, sizeof host.s_addr);
}
ncprange_setip4(&ipcp->cfg.my_range, host, ipcp->cfg.netmask);
ncprange_setip4(&ipcp->cfg.peer_range, ipcp->cfg.netmask, ipcp->cfg.netmask);
iplist_setsrc(&ipcp->cfg.peer_list, "");
ipcp->cfg.HaveTriggerAddress = 0;
ipcp->cfg.ns.dns[0].s_addr = INADDR_NONE;
ipcp->cfg.ns.dns[1].s_addr = INADDR_NONE;
ipcp->cfg.ns.dns_neg = 0;
ipcp->cfg.ns.nbns[0].s_addr = INADDR_ANY;
ipcp->cfg.ns.nbns[1].s_addr = INADDR_ANY;
ipcp->cfg.fsm.timeout = DEF_FSMRETRY;
ipcp->cfg.fsm.maxreq = DEF_FSMTRIES;
ipcp->cfg.fsm.maxtrm = DEF_FSMTRIES;
ipcp->cfg.vj.neg = NEG_ENABLED|NEG_ACCEPTED;
memset(&ipcp->vj, '\0', sizeof ipcp->vj);
ipcp->ns.resolv = NULL;
ipcp->ns.resolv_nons = NULL;
ipcp->ns.writable = 1;
ipcp_LoadDNS(ipcp);
throughput_init(&ipcp->throughput, SAMPLE_PERIOD);
memset(ipcp->Queue, '\0', sizeof ipcp->Queue);
ipcp_Setup(ipcp, INADDR_NONE);
}
void
ipcp_Destroy(struct ipcp *ipcp)
{
throughput_destroy(&ipcp->throughput);
if (ipcp->ns.resolv != NULL) {
free(ipcp->ns.resolv);
ipcp->ns.resolv = NULL;
}
if (ipcp->ns.resolv_nons != NULL) {
free(ipcp->ns.resolv_nons);
ipcp->ns.resolv_nons = NULL;
}
}
void
ipcp_SetLink(struct ipcp *ipcp, struct link *l)
{
ipcp->fsm.link = l;
}
void
ipcp_Setup(struct ipcp *ipcp, u_int32_t mask)
{
struct iface *iface = ipcp->fsm.bundle->iface;
struct ncpaddr ipaddr;
struct in_addr peer;
int pos;
unsigned n;
ipcp->fsm.open_mode = 0;
ipcp->ifmask.s_addr = mask == INADDR_NONE ? ipcp->cfg.netmask.s_addr : mask;
if (iplist_isvalid(&ipcp->cfg.peer_list)) {
/* Try to give the peer a previously configured IP address */
for (n = 0; n < iface->addrs; n++) {
if (!ncpaddr_getip4(&iface->addr[n].peer, &peer))
continue;
if ((pos = iplist_ip2pos(&ipcp->cfg.peer_list, peer)) != -1) {
ncpaddr_setip4(&ipaddr, iplist_setcurpos(&ipcp->cfg.peer_list, pos));
break;
}
}
if (n == iface->addrs)
/* Ok, so none of 'em fit.... pick a random one */
ncpaddr_setip4(&ipaddr, iplist_setrandpos(&ipcp->cfg.peer_list));
ncprange_sethost(&ipcp->cfg.peer_range, &ipaddr);
}
ipcp->heis1172 = 0;
ipcp->peer_req = 0;
ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip);
ipcp->peer_compproto = 0;
if (ipcp->cfg.HaveTriggerAddress) {
/*
* Some implementations of PPP require that we send a
* *special* value as our address, even though the rfc specifies
* full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0").
*/
ipcp->my_ip = ipcp->cfg.TriggerAddress;
log_Printf(LogIPCP, "Using trigger address %s\n",
inet_ntoa(ipcp->cfg.TriggerAddress));
} else {
/*
* Otherwise, if we've used an IP number before and it's still within
* the network specified on the ``set ifaddr'' line, we really
* want to keep that IP number so that we can keep any existing
* connections that are bound to that IP.
*/
for (n = 0; n < iface->addrs; n++) {
ncprange_getaddr(&iface->addr[n].ifa, &ipaddr);
if (ncprange_contains(&ipcp->cfg.my_range, &ipaddr)) {
ncpaddr_getip4(&ipaddr, &ipcp->my_ip);
break;
}
}
if (n == iface->addrs)
ncprange_getip4addr(&ipcp->cfg.my_range, &ipcp->my_ip);
}
if (IsEnabled(ipcp->cfg.vj.neg)
#ifndef NORADIUS
|| (ipcp->fsm.bundle->radius.valid && ipcp->fsm.bundle->radius.vj)
#endif
)
ipcp->my_compproto = (PROTO_VJCOMP << 16) +
((ipcp->cfg.vj.slots - 1) << 8) +
ipcp->cfg.vj.slotcomp;
else
ipcp->my_compproto = 0;
sl_compress_init(&ipcp->vj.cslc, ipcp->cfg.vj.slots - 1);
ipcp->peer_reject = 0;
ipcp->my_reject = 0;
/* Copy startup values into ipcp->ns.dns */
if (ipcp->cfg.ns.dns[0].s_addr != INADDR_NONE)
memcpy(ipcp->ns.dns, ipcp->cfg.ns.dns, sizeof ipcp->ns.dns);
}
static int
numaddresses(struct in_addr mask)
{
u_int32_t bit, haddr;
int n;
haddr = ntohl(mask.s_addr);
bit = 1;
n = 1;
do {
if (!(haddr & bit))
n <<= 1;
} while (bit <<= 1);
return n;
}
static int
ipcp_proxyarp(struct ipcp *ipcp,
int (*proxyfun)(struct bundle *, struct in_addr),
const struct iface_addr *addr)
{
struct bundle *bundle = ipcp->fsm.bundle;
struct in_addr peer, mask, ip;
int n, ret;
if (!ncpaddr_getip4(&addr->peer, &peer)) {
log_Printf(LogERROR, "Oops, ipcp_proxyarp() called with unexpected addr\n");
return 0;
}
ret = 0;
if (Enabled(bundle, OPT_PROXYALL)) {
ncprange_getip4mask(&addr->ifa, &mask);
if ((n = numaddresses(mask)) > 256) {
log_Printf(LogWARN, "%s: Too many addresses for proxyall\n",
ncprange_ntoa(&addr->ifa));
return 0;
}
ip.s_addr = peer.s_addr & mask.s_addr;
if (n >= 4) {
ip.s_addr = htonl(ntohl(ip.s_addr) + 1);
n -= 2;
}
while (n) {
if (!((ip.s_addr ^ peer.s_addr) & mask.s_addr)) {
if (!(ret = (*proxyfun)(bundle, ip)))
break;
n--;
}
ip.s_addr = htonl(ntohl(ip.s_addr) + 1);
}
ret = !n;
} else if (Enabled(bundle, OPT_PROXY))
ret = (*proxyfun)(bundle, peer);
return ret;
}
static int
ipcp_SetIPaddress(struct ipcp *ipcp, struct in_addr myaddr,
struct in_addr hisaddr)
{
struct bundle *bundle = ipcp->fsm.bundle;
struct ncpaddr myncpaddr, hisncpaddr;
struct ncprange myrange;
struct in_addr mask;
struct sockaddr_storage ssdst, ssgw, ssmask;
struct sockaddr *sadst, *sagw, *samask;
sadst = (struct sockaddr *)&ssdst;
sagw = (struct sockaddr *)&ssgw;
samask = (struct sockaddr *)&ssmask;
ncpaddr_setip4(&hisncpaddr, hisaddr);
ncpaddr_setip4(&myncpaddr, myaddr);
ncprange_sethost(&myrange, &myncpaddr);
mask = addr2mask(myaddr);
if (ipcp->ifmask.s_addr != INADDR_ANY &&
(ipcp->ifmask.s_addr & mask.s_addr) == mask.s_addr)
ncprange_setip4mask(&myrange, ipcp->ifmask);
if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &hisncpaddr,
IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM))
return 0;
if (!Enabled(bundle, OPT_IFACEALIAS))
iface_Clear(bundle->iface, &bundle->ncp, AF_INET,
IFACE_CLEAR_ALIASES|IFACE_SYSTEM);
if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) {
ncprange_getsa(&myrange, &ssgw, &ssmask);
ncpaddr_getsa(&hisncpaddr, &ssdst);
rt_Update(bundle, sadst, sagw, samask);
}
if (Enabled(bundle, OPT_SROUTES))
route_Change(bundle, bundle->ncp.route, &myncpaddr, &hisncpaddr);
#ifndef NORADIUS
if (bundle->radius.valid)
route_Change(bundle, bundle->radius.routes, &myncpaddr, &hisncpaddr);
#endif
return 1; /* Ok */
}
static struct in_addr
ChooseHisAddr(struct bundle *bundle, struct in_addr gw)
{
struct in_addr try;
u_long f;
for (f = 0; f < bundle->ncp.ipcp.cfg.peer_list.nItems; f++) {
try = iplist_next(&bundle->ncp.ipcp.cfg.peer_list);
log_Printf(LogDEBUG, "ChooseHisAddr: Check item %ld (%s)\n",
f, inet_ntoa(try));
if (ipcp_SetIPaddress(&bundle->ncp.ipcp, gw, try)) {
log_Printf(LogIPCP, "Selected IP address %s\n", inet_ntoa(try));
break;
}
}
if (f == bundle->ncp.ipcp.cfg.peer_list.nItems) {
log_Printf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n");
try.s_addr = INADDR_ANY;
}
return try;
}
static void
IpcpInitRestartCounter(struct fsm *fp, int what)
{
/* Set fsm timer load */
struct ipcp *ipcp = fsm2ipcp(fp);
fp->FsmTimer.load = ipcp->cfg.fsm.timeout * SECTICKS;
switch (what) {
case FSM_REQ_TIMER:
fp->restart = ipcp->cfg.fsm.maxreq;
break;
case FSM_TRM_TIMER:
fp->restart = ipcp->cfg.fsm.maxtrm;
break;
default:
fp->restart = 1;
break;
}
}
static void
IpcpSendConfigReq(struct fsm *fp)
{
/* Send config REQ please */
struct physical *p = link2physical(fp->link);
struct ipcp *ipcp = fsm2ipcp(fp);
u_char buff[24];
struct fsm_opt *o;
o = (struct fsm_opt *)buff;
if ((p && !physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) {
memcpy(o->data, &ipcp->my_ip.s_addr, 4);
INC_FSM_OPT(TY_IPADDR, 6, o);
}
if (ipcp->my_compproto && !REJECTED(ipcp, TY_COMPPROTO)) {
if (ipcp->heis1172) {
u_int16_t proto = PROTO_VJCOMP;
ua_htons(&proto, o->data);
INC_FSM_OPT(TY_COMPPROTO, 4, o);
} else {
struct compreq req;
req.proto = htons(ipcp->my_compproto >> 16);
req.slots = (ipcp->my_compproto >> 8) & 255;
req.compcid = ipcp->my_compproto & 1;
memcpy(o->data, &req, 4);
INC_FSM_OPT(TY_COMPPROTO, 6, o);
}
}
if (IsEnabled(ipcp->cfg.ns.dns_neg)) {
if (!REJECTED(ipcp, TY_PRIMARY_DNS - TY_ADJUST_NS)) {
memcpy(o->data, &ipcp->ns.dns[0].s_addr, 4);
INC_FSM_OPT(TY_PRIMARY_DNS, 6, o);
}
if (!REJECTED(ipcp, TY_SECONDARY_DNS - TY_ADJUST_NS)) {
memcpy(o->data, &ipcp->ns.dns[1].s_addr, 4);
INC_FSM_OPT(TY_SECONDARY_DNS, 6, o);
}
}
fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff,
MB_IPCPOUT);
}
static void
IpcpSentTerminateReq(struct fsm *fp __unused)
{
/* Term REQ just sent by FSM */
}
static void
IpcpSendTerminateAck(struct fsm *fp, u_char id)
{
/* Send Term ACK please */
fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPCPOUT);
}
static void
IpcpLayerStart(struct fsm *fp)
{
/* We're about to start up ! */
struct ipcp *ipcp = fsm2ipcp(fp);
log_Printf(LogIPCP, "%s: LayerStart.\n", fp->link->name);
throughput_start(&ipcp->throughput, "IPCP throughput",
Enabled(fp->bundle, OPT_THROUGHPUT));
fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3;
ipcp->peer_req = 0;
}
static void
IpcpLayerFinish(struct fsm *fp)
{
/* We're now down */
struct ipcp *ipcp = fsm2ipcp(fp);
log_Printf(LogIPCP, "%s: LayerFinish.\n", fp->link->name);
throughput_stop(&ipcp->throughput);
throughput_log(&ipcp->throughput, LogIPCP, NULL);
}
/*
* Called from iface_Add() via ncp_IfaceAddrAdded()
*/
void
ipcp_IfaceAddrAdded(struct ipcp *ipcp, const struct iface_addr *addr)
{
struct bundle *bundle = ipcp->fsm.bundle;
if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL))
ipcp_proxyarp(ipcp, arp_SetProxy, addr);
}
/*
* Called from iface_Clear() and iface_Delete() via ncp_IfaceAddrDeleted()
*/
void
ipcp_IfaceAddrDeleted(struct ipcp *ipcp, const struct iface_addr *addr)
{
struct bundle *bundle = ipcp->fsm.bundle;
if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL))
ipcp_proxyarp(ipcp, arp_ClearProxy, addr);
}
static void
IpcpLayerDown(struct fsm *fp)
{
/* About to come down */
struct ipcp *ipcp = fsm2ipcp(fp);
static int recursing;
char addr[16];
if (!recursing++) {
snprintf(addr, sizeof addr, "%s", inet_ntoa(ipcp->my_ip));
log_Printf(LogIPCP, "%s: LayerDown: %s\n", fp->link->name, addr);
#ifndef NORADIUS
radius_Account(&fp->bundle->radius, &fp->bundle->radacct,
fp->bundle->links, RAD_STOP, &ipcp->peer_ip, &ipcp->ifmask,
&ipcp->throughput);
if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid)
system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE,
NULL, NULL);
#endif
/*
* XXX this stuff should really live in the FSM. Our config should
* associate executable sections in files with events.
*/
if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) {
if (bundle_GetLabel(fp->bundle)) {
if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
LINKDOWNFILE, NULL, NULL) < 0)
system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL);
} else
system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL);
}
ipcp_Setup(ipcp, INADDR_NONE);
}
recursing--;
}
int
ipcp_InterfaceUp(struct ipcp *ipcp)
{
if (!ipcp_SetIPaddress(ipcp, ipcp->my_ip, ipcp->peer_ip)) {
log_Printf(LogERROR, "ipcp_InterfaceUp: unable to set ip address\n");
return 0;
}
if (!iface_SetFlags(ipcp->fsm.bundle->iface->name, IFF_UP)) {
log_Printf(LogERROR, "ipcp_InterfaceUp: Can't set the IFF_UP flag on %s\n",
ipcp->fsm.bundle->iface->name);
return 0;
}
#ifndef NONAT
if (ipcp->fsm.bundle->NatEnabled)
PacketAliasSetAddress(ipcp->my_ip);
#endif
return 1;
}
static int
IpcpLayerUp(struct fsm *fp)
{
/* We're now up */
struct ipcp *ipcp = fsm2ipcp(fp);
char tbuff[16];
log_Printf(LogIPCP, "%s: LayerUp.\n", fp->link->name);
snprintf(tbuff, sizeof tbuff, "%s", inet_ntoa(ipcp->my_ip));
log_Printf(LogIPCP, "myaddr %s hisaddr = %s\n",
tbuff, inet_ntoa(ipcp->peer_ip));
if (ipcp->peer_compproto >> 16 == PROTO_VJCOMP)
sl_compress_init(&ipcp->vj.cslc, (ipcp->peer_compproto >> 8) & 255);
if (!ipcp_InterfaceUp(ipcp))
return 0;
#ifndef NORADIUS
radius_Account(&fp->bundle->radius, &fp->bundle->radacct, fp->bundle->links,
RAD_START, &ipcp->peer_ip, &ipcp->ifmask, &ipcp->throughput);
if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid)
system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE,
NULL, NULL);
#endif
/*
* XXX this stuff should really live in the FSM. Our config should
* associate executable sections in files with events.
*/
if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) {
if (bundle_GetLabel(fp->bundle)) {
if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
LINKUPFILE, NULL, NULL) < 0)
system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL);
} else
system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL);
}
fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3;
log_DisplayPrompts();
return 1;
}
static void
ipcp_ValidateReq(struct ipcp *ipcp, struct in_addr ip, struct fsm_decode *dec)
{
struct bundle *bundle = ipcp->fsm.bundle;
struct iface *iface = bundle->iface;
struct in_addr myaddr, peer;
unsigned n;
if (iplist_isvalid(&ipcp->cfg.peer_list)) {
ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr);
if (ip.s_addr == INADDR_ANY ||
iplist_ip2pos(&ipcp->cfg.peer_list, ip) < 0 ||
!ipcp_SetIPaddress(ipcp, myaddr, ip)) {
log_Printf(LogIPCP, "%s: Address invalid or already in use\n",
inet_ntoa(ip));
/*
* If we've already had a valid address configured for the peer,
* try NAKing with that so that we don't have to upset things
* too much.
*/
for (n = 0; n < iface->addrs; n++) {
if (!ncpaddr_getip4(&iface->addr[n].peer, &peer))
continue;
if (iplist_ip2pos(&ipcp->cfg.peer_list, peer) >= 0) {
ipcp->peer_ip = peer;
break;
}
}
if (n == iface->addrs) {
/* Just pick an IP number from our list */
ipcp->peer_ip = ChooseHisAddr(bundle, myaddr);
}
if (ipcp->peer_ip.s_addr == INADDR_ANY) {
*dec->rejend++ = TY_IPADDR;
*dec->rejend++ = 6;
memcpy(dec->rejend, &ip.s_addr, 4);
dec->rejend += 4;