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
|
diff -Naur ppp-2.4.4.orig/pppd/ipcp.c ppp-2.4.4/pppd/ipcp.c
--- ppp-2.4.4.orig/pppd/ipcp.c 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/ipcp.c 2009-05-09 02:58:31.000000000 -0400
@@ -197,6 +197,14 @@
"disable defaultroute option", OPT_ALIAS | OPT_A2CLR,
&ipcp_wantoptions[0].default_route },
+ { "replacedefaultroute", o_bool,
+ &ipcp_wantoptions[0].replace_default_route,
+ "Replace default route", 1
+ },
+ { "noreplacedefaultroute", o_bool,
+ &ipcp_allowoptions[0].replace_default_route,
+ "Never replace default route", OPT_A2COPY,
+ &ipcp_wantoptions[0].replace_default_route },
{ "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
"Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
{ "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
@@ -263,7 +271,7 @@
ip_active_pkt
};
-static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
+static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t, bool));
static void ipcp_script __P((char *, int)); /* Run an up/down script */
static void ipcp_script_done __P((void *));
@@ -1660,7 +1668,8 @@
if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
return 0;
if (wo->default_route)
- if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
+ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr,
+ wo->replace_default_route))
default_route_set[u] = 1;
if (wo->proxy_arp)
if (sifproxyarp(u, wo->hisaddr))
@@ -1742,7 +1751,8 @@
*/
if (demand) {
if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
- ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr);
+ ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr,
+ wo->replace_default_route);
if (go->ouraddr != wo->ouraddr) {
warn("Local IP address changed to %I", go->ouraddr);
script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr), 0);
@@ -1767,7 +1777,8 @@
/* assign a default route through the interface if required */
if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
+ wo->replace_default_route))
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
@@ -1817,7 +1828,8 @@
/* assign a default route through the interface if required */
if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
+ wo->replace_default_route))
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
@@ -1894,7 +1906,7 @@
sifnpmode(f->unit, PPP_IP, NPMODE_DROP);
sifdown(f->unit);
ipcp_clear_addrs(f->unit, ipcp_gotoptions[f->unit].ouraddr,
- ipcp_hisoptions[f->unit].hisaddr);
+ ipcp_hisoptions[f->unit].hisaddr, 0);
}
/* Execute the ip-down script */
@@ -1910,16 +1922,25 @@
* proxy arp entries, etc.
*/
static void
-ipcp_clear_addrs(unit, ouraddr, hisaddr)
+ipcp_clear_addrs(unit, ouraddr, hisaddr, replacedefaultroute)
int unit;
u_int32_t ouraddr; /* local address */
u_int32_t hisaddr; /* remote address */
+ bool replacedefaultroute;
{
if (proxy_arp_set[unit]) {
cifproxyarp(unit, hisaddr);
proxy_arp_set[unit] = 0;
}
- if (default_route_set[unit]) {
+ /* If replacedefaultroute, sifdefaultroute will be called soon
+ * with replacedefaultroute set and that will overwrite the current
+ * default route. This is the case only when doing demand, otherwise
+ * during demand, this cifdefaultroute would restore the old default
+ * route which is not what we want in this case. In the non-demand
+ * case, we'll delete the default route and restore the old if there
+ * is one saved by an sifdefaultroute with replacedefaultroute.
+ */
+ if (!replacedefaultroute && default_route_set[unit]) {
cifdefaultroute(unit, ouraddr, hisaddr);
default_route_set[unit] = 0;
}
diff -Naur ppp-2.4.4.orig/pppd/ipcp.h ppp-2.4.4/pppd/ipcp.h
--- ppp-2.4.4.orig/pppd/ipcp.h 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/ipcp.h 2009-05-09 02:58:31.000000000 -0400
@@ -70,6 +70,7 @@
bool old_addrs; /* Use old (IP-Addresses) option? */
bool req_addr; /* Ask peer to send IP address? */
bool default_route; /* Assign default route through interface? */
+ bool replace_default_route; /* Replace default route through interface? */
bool proxy_arp; /* Make proxy ARP entry for peer? */
bool neg_vj; /* Van Jacobson Compression? */
bool old_vj; /* use old (short) form of VJ option? */
diff -Naur ppp-2.4.4.orig/pppd/pppd.8 ppp-2.4.4/pppd/pppd.8
--- ppp-2.4.4.orig/pppd/pppd.8 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/pppd.8 2009-05-09 02:58:31.000000000 -0400
@@ -121,6 +121,11 @@
This entry is removed when the PPP connection is broken. This option
is privileged if the \fInodefaultroute\fR option has been specified.
.TP
+.B replacedefaultroute
+This option is a flag to the defaultroute option. If defaultroute is
+set and this flag is also set, pppd replaces an existing default route
+with the new default route.
+.TP
.B disconnect \fIscript
Execute the command specified by \fIscript\fR, by passing it to a
shell, after
@@ -706,7 +711,12 @@
.TP
.B nodefaultroute
Disable the \fIdefaultroute\fR option. The system administrator who
-wishes to prevent users from creating default routes with pppd
+wishes to prevent users from adding a default route with pppd
+can do so by placing this option in the /etc/ppp/options file.
+.TP
+.B noreplacedefaultroute
+Disable the \fIreplacedefaultroute\fR option. The system administrator who
+wishes to prevent users from replacing a default route with pppd
can do so by placing this option in the /etc/ppp/options file.
.TP
.B nodeflate
diff -Naur ppp-2.4.4.orig/pppd/pppd.h ppp-2.4.4/pppd/pppd.h
--- ppp-2.4.4.orig/pppd/pppd.h 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/pppd.h 2009-05-09 02:58:31.000000000 -0400
@@ -644,7 +644,7 @@
int cif6addr __P((int, eui64_t, eui64_t));
/* Remove an IPv6 address from i/f */
#endif
-int sifdefaultroute __P((int, u_int32_t, u_int32_t));
+int sifdefaultroute __P((int, u_int32_t, u_int32_t, bool replace_default_rt));
/* Create default route through i/f */
int cifdefaultroute __P((int, u_int32_t, u_int32_t));
/* Delete default route through i/f */
diff -Naur ppp-2.4.4.orig/pppd/sys-linux.c ppp-2.4.4/pppd/sys-linux.c
--- ppp-2.4.4.orig/pppd/sys-linux.c 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/sys-linux.c 2009-05-09 02:58:31.000000000 -0400
@@ -206,6 +206,8 @@
static int if_is_up; /* Interface has been marked up */
static int have_default_route; /* Gateway for default route added */
+static struct rtentry old_def_rt; /* Old default route */
+static int default_rt_repl_rest; /* replace and restore old default rt */
static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
static char proxy_arp_dev[16]; /* Device for proxy arp entry */
static u_int32_t our_old_addr; /* for detecting address changes */
@@ -1520,6 +1522,9 @@
p = NULL;
}
+ SET_SA_FAMILY (rt->rt_dst, AF_INET);
+ SET_SA_FAMILY (rt->rt_gateway, AF_INET);
+
SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
@@ -1589,20 +1594,51 @@
/********************************************************************
*
* sifdefaultroute - assign a default route through the address given.
- */
-
-int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
-{
- struct rtentry rt;
-
- if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
- if (rt.rt_flags & RTF_GATEWAY)
- error("not replacing existing default route via %I",
- SIN_ADDR(rt.rt_gateway));
- else
+ *
+ * If the global default_rt_repl_rest flag is set, then this function
+ * already replaced the original system defaultroute with some other
+ * route and it should just replace the current defaultroute with
+ * another one, without saving the current route. Use: demand mode,
+ * when pppd sets first a defaultroute it it's temporary ppp0 addresses
+ * and then changes the temporary addresses to the addresses for the real
+ * ppp connection when it has come up.
+ */
+
+int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
+{
+ struct rtentry rt, tmp_rt;
+ struct rtentry *del_rt = NULL;
+
+ if (default_rt_repl_rest) {
+ /* We have already reclaced the original defaultroute, if we
+ are called again, we will delete the current default route
+ and set the new default route in this function.
+ - this is normally only the case the doing demand: */
+ if (defaultroute_exists(&tmp_rt))
+ del_rt = &tmp_rt;
+ } else if (defaultroute_exists(&old_def_rt) &&
+ strcmp(old_def_rt.rt_dev, ifname) != 0) {
+ /* We did not yet replace an existing default route, let's
+ check if we should save and replace a default route: */
+ if (old_def_rt.rt_flags & RTF_GATEWAY) {
+ if (!replace) {
+ error("not replacing existing default route via %I",
+ SIN_ADDR(old_def_rt.rt_gateway));
+ return 0;
+ } else {
+ /* we need to copy rt_dev because we need it permanent too: */
+ char *tmp_dev = malloc(strlen(old_def_rt.rt_dev) + 1);
+ strcpy(tmp_dev, old_def_rt.rt_dev);
+ old_def_rt.rt_dev = tmp_dev;
+
+ notice("replacing old default route to %s [%I]",
+ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
+ default_rt_repl_rest = 1;
+ del_rt = &old_def_rt;
+ }
+ } else
error("not replacing existing default route through %s",
- rt.rt_dev);
- return 0;
+ old_def_rt.rt_dev);
}
memset (&rt, 0, sizeof (rt));
@@ -1617,10 +1653,16 @@
rt.rt_flags = RTF_UP;
if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
- if ( ! ok_error ( errno ))
+ if (!ok_error(errno))
error("default route ioctl(SIOCADDRT): %m");
return 0;
}
+ if (default_rt_repl_rest && del_rt)
+ if (ioctl(sock_fd, SIOCDELRT, del_rt) < 0) {
+ if (!ok_error(errno))
+ error("del old default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
have_default_route = 1;
return 1;
@@ -1649,11 +1691,21 @@
rt.rt_flags = RTF_UP;
if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
if (still_ppp()) {
- if ( ! ok_error ( errno ))
+ if (!ok_error(errno))
error("default route ioctl(SIOCDELRT): %m");
return 0;
}
}
+ if (default_rt_repl_rest) {
+ notice("restoring old default route to %s [%I]",
+ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
+ if (ioctl(sock_fd, SIOCADDRT, &old_def_rt) < 0) {
+ if (!ok_error(errno))
+ error("restore default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
+ default_rt_repl_rest = 0;
+ }
return 1;
}
diff -Naur ppp-2.4.4.orig/pppd/sys-solaris.c ppp-2.4.4/pppd/sys-solaris.c
--- ppp-2.4.4.orig/pppd/sys-solaris.c 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/sys-solaris.c 2009-05-09 02:58:31.000000000 -0400
@@ -2036,12 +2036,18 @@
* sifdefaultroute - assign a default route through the address given.
*/
int
-sifdefaultroute(u, l, g)
+sifdefaultroute(u, l, g, replace)
int u;
u_int32_t l, g;
+ bool replace;
{
struct rtentry rt;
+ if (replace) {
+ error("replacedefaultroute not supported on this platform");
+ return 0;
+ }
+
#if defined(__USLC__)
g = l; /* use the local address as gateway */
#endif
diff -Naur ppp-2.4.4.orig/pppd/ipcp.c ppp-2.4.4/pppd/ipcp.c
--- ppp-2.4.4.orig/pppd/ipcp.c 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/ipcp.c 2009-05-09 02:58:31.000000000 -0400
@@ -197,6 +197,14 @@
"disable defaultroute option", OPT_ALIAS | OPT_A2CLR,
&ipcp_wantoptions[0].default_route },
+ { "replacedefaultroute", o_bool,
+ &ipcp_wantoptions[0].replace_default_route,
+ "Replace default route", 1
+ },
+ { "noreplacedefaultroute", o_bool,
+ &ipcp_allowoptions[0].replace_default_route,
+ "Never replace default route", OPT_A2COPY,
+ &ipcp_wantoptions[0].replace_default_route },
{ "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
"Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
{ "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
@@ -263,7 +271,7 @@
ip_active_pkt
};
-static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
+static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t, bool));
static void ipcp_script __P((char *, int)); /* Run an up/down script */
static void ipcp_script_done __P((void *));
@@ -1660,7 +1668,8 @@
if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
return 0;
if (wo->default_route)
- if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
+ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr,
+ wo->replace_default_route))
default_route_set[u] = 1;
if (wo->proxy_arp)
if (sifproxyarp(u, wo->hisaddr))
@@ -1742,7 +1751,8 @@
*/
if (demand) {
if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
- ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr);
+ ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr,
+ wo->replace_default_route);
if (go->ouraddr != wo->ouraddr) {
warn("Local IP address changed to %I", go->ouraddr);
script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr), 0);
@@ -1767,7 +1777,8 @@
/* assign a default route through the interface if required */
if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
+ wo->replace_default_route))
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
@@ -1817,7 +1828,8 @@
/* assign a default route through the interface if required */
if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
+ wo->replace_default_route))
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
@@ -1894,7 +1906,7 @@
sifnpmode(f->unit, PPP_IP, NPMODE_DROP);
sifdown(f->unit);
ipcp_clear_addrs(f->unit, ipcp_gotoptions[f->unit].ouraddr,
- ipcp_hisoptions[f->unit].hisaddr);
+ ipcp_hisoptions[f->unit].hisaddr, 0);
}
/* Execute the ip-down script */
@@ -1910,16 +1922,25 @@
* proxy arp entries, etc.
*/
static void
-ipcp_clear_addrs(unit, ouraddr, hisaddr)
+ipcp_clear_addrs(unit, ouraddr, hisaddr, replacedefaultroute)
int unit;
u_int32_t ouraddr; /* local address */
u_int32_t hisaddr; /* remote address */
+ bool replacedefaultroute;
{
if (proxy_arp_set[unit]) {
cifproxyarp(unit, hisaddr);
proxy_arp_set[unit] = 0;
}
- if (default_route_set[unit]) {
+ /* If replacedefaultroute, sifdefaultroute will be called soon
+ * with replacedefaultroute set and that will overwrite the current
+ * default route. This is the case only when doing demand, otherwise
+ * during demand, this cifdefaultroute would restore the old default
+ * route which is not what we want in this case. In the non-demand
+ * case, we'll delete the default route and restore the old if there
+ * is one saved by an sifdefaultroute with replacedefaultroute.
+ */
+ if (!replacedefaultroute && default_route_set[unit]) {
cifdefaultroute(unit, ouraddr, hisaddr);
default_route_set[unit] = 0;
}
diff -Naur ppp-2.4.4.orig/pppd/ipcp.h ppp-2.4.4/pppd/ipcp.h
--- ppp-2.4.4.orig/pppd/ipcp.h 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/ipcp.h 2009-05-09 02:58:31.000000000 -0400
@@ -70,6 +70,7 @@
bool old_addrs; /* Use old (IP-Addresses) option? */
bool req_addr; /* Ask peer to send IP address? */
bool default_route; /* Assign default route through interface? */
+ bool replace_default_route; /* Replace default route through interface? */
bool proxy_arp; /* Make proxy ARP entry for peer? */
bool neg_vj; /* Van Jacobson Compression? */
bool old_vj; /* use old (short) form of VJ option? */
diff -Naur ppp-2.4.4.orig/pppd/pppd.8 ppp-2.4.4/pppd/pppd.8
--- ppp-2.4.4.orig/pppd/pppd.8 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/pppd.8 2009-05-09 02:58:31.000000000 -0400
@@ -121,6 +121,11 @@
This entry is removed when the PPP connection is broken. This option
is privileged if the \fInodefaultroute\fR option has been specified.
.TP
+.B replacedefaultroute
+This option is a flag to the defaultroute option. If defaultroute is
+set and this flag is also set, pppd replaces an existing default route
+with the new default route.
+.TP
.B disconnect \fIscript
Execute the command specified by \fIscript\fR, by passing it to a
shell, after
@@ -706,7 +711,12 @@
.TP
.B nodefaultroute
Disable the \fIdefaultroute\fR option. The system administrator who
-wishes to prevent users from creating default routes with pppd
+wishes to prevent users from adding a default route with pppd
+can do so by placing this option in the /etc/ppp/options file.
+.TP
+.B noreplacedefaultroute
+Disable the \fIreplacedefaultroute\fR option. The system administrator who
+wishes to prevent users from replacing a default route with pppd
can do so by placing this option in the /etc/ppp/options file.
.TP
.B nodeflate
diff -Naur ppp-2.4.4.orig/pppd/pppd.h ppp-2.4.4/pppd/pppd.h
--- ppp-2.4.4.orig/pppd/pppd.h 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/pppd.h 2009-05-09 02:58:31.000000000 -0400
@@ -644,7 +644,7 @@
int cif6addr __P((int, eui64_t, eui64_t));
/* Remove an IPv6 address from i/f */
#endif
-int sifdefaultroute __P((int, u_int32_t, u_int32_t));
+int sifdefaultroute __P((int, u_int32_t, u_int32_t, bool replace_default_rt));
/* Create default route through i/f */
int cifdefaultroute __P((int, u_int32_t, u_int32_t));
/* Delete default route through i/f */
diff -Naur ppp-2.4.4.orig/pppd/sys-linux.c ppp-2.4.4/pppd/sys-linux.c
--- ppp-2.4.4.orig/pppd/sys-linux.c 2009-05-09 02:55:46.000000000 -0400
+++ ppp-2.4.4/pppd/sys-linux.c 2009-05-09 02:58:31.000000000 -0400
@@ -206,6 +206,8 @@
static int if_is_up; /* Interface has been marked up */
static int have_default_route; /* Gateway for default route added */
+static struct rtentry old_def_rt; /* Old default route */
+static int default_rt_repl_rest; /* replace and restore old default rt */
static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
static char proxy_arp_dev[16]; /* Device for proxy arp entry */
static u_int32_t our_old_addr; /* for detecting address changes */
@@ -1520,6 +1522,9 @@
p = NULL;
}
+ SET_SA_FAMILY (rt->rt_dst, AF_INET);
+ SET_SA_FAMILY (rt->rt_gateway, AF_INET);
+
SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
@@ -1589,20 +1594,51 @@
/********************************************************************
*
* sifdefaultroute - assign a default route through the address given.
- */
-
-int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
-{
- struct rtentry rt;
-
- if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
- if (rt.rt_flags & RTF_GATEWAY)
- error("not replacing existing default route via %I",
- SIN_ADDR(rt.rt_gateway));
- else
+ *
+ * If the global default_rt_repl_rest flag is set, then this function
+ * already replaced the original system defaultroute with some other
+ * route and it should just replace the current defaultroute with
+ * another one, without saving the current route. Use: demand mode,
+ * when pppd sets first a defaultroute it it's temporary ppp0 addresses
+ * and then changes the temporary addresses to the addresses for the real
+ * ppp connection when it has come up.
+ */
+
+int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
+{
+ struct rtentry rt, tmp_rt;
+ struct rtentry *del_rt = NULL;
+
+ if (default_rt_repl_rest) {
+ /* We have already reclaced the original defaultroute, if we
+ are called again, we will delete the current default route
+ and set the new default route in this function.
+ - this is normally only the case the doing demand: */
+ if (defaultroute_exists(&tmp_rt))
+ del_rt = &tmp_rt;
+ } else if (defaultroute_exists(&old_def_rt) &&
+ strcmp(old_def_rt.rt_dev, ifname) != 0) {
+ /* We did not yet replace an existing default route, let's
+ check if we should save and replace a default route: */
+ if (old_def_rt.rt_flags & RTF_GATEWAY) {
+ if (!replace) {
+ error("not replacing existing default route via %I",
+ SIN_ADDR(old_def_rt.rt_gateway));
+ return 0;
+ } else {
+ /* we need to copy rt_dev because we need it permanent too: */
+ char *tmp_dev = malloc(strlen(old_def_rt.rt_dev) + 1);
+ strcpy(tmp_dev, old_def_rt.rt_dev);
+ old_def_rt.rt_dev = tmp_dev;
+
+ notice("replacing old default route to %s [%I]",
+ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
+ default_rt_repl_rest = 1;
+ del_rt = &old_def_rt;
+ }
+ } else
error("not replacing existing default route through %s",
- rt.rt_dev);
- return 0;
+ old_def_rt.rt_dev);
}
memset (&rt, 0, sizeof (rt));
@@ -1617,10 +1653,16 @@
rt.rt_flags = RTF_UP;
if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
- if ( ! ok_error ( errno ))
+ if (!ok_error(errno))
error("default route ioctl(SIOCADDRT): %m");
return 0;
}
+ if (default_rt_repl_rest && del_rt)
+ if (ioctl(sock_fd, SIOCDELRT, del_rt) < 0) {
+ if (!ok_error(errno))
+ error("del old default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
have_default_route = 1;
return 1;
@@ -1649,11 +1691,21 @@
rt.rt_flags = RTF_UP;
if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
if (still_ppp()) {
- if ( ! ok_error ( errno ))
+ if (!ok_error(errno))
error("default route ioctl(SIOCDELRT): %m");
return 0;
}
}
+ if (default_rt_repl_rest) {
+ notice("restoring old default route to %s [%I]",
+ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
+ if (ioctl(sock_fd, SIOCADDRT, &old_def_rt) < 0) {
+ if (!ok_error(errno))
+ error("restore default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
+ default_rt_repl_rest = 0;
+ }
return 1;
}
diff -Naur ppp-2.4.4.orig/pppd/sys-solaris.c ppp-2.4.4/pppd/sys-solaris.c
--- ppp-2.4.4.orig/pppd/sys-solaris.c 2009-05-09 02:54:59.000000000 -0400
+++ ppp-2.4.4/pppd/sys-solaris.c 2009-05-09 02:58:31.000000000 -0400
@@ -2036,12 +2036,18 @@
* sifdefaultroute - assign a default route through the address given.
*/
int
-sifdefaultroute(u, l, g)
+sifdefaultroute(u, l, g, replace)
int u;
u_int32_t l, g;
+ bool replace;
{
struct rtentry rt;
+ if (replace) {
+ error("replacedefaultroute not supported on this platform");
+ return 0;
+ }
+
#if defined(__USLC__)
g = l; /* use the local address as gateway */
#endif
|
