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BW Limiter: Restore BW limiter broken.
[tomato.git] / release / src / router / rc / wan.c
blob170a972fa9068093975d1a8ed230bfd51177a5f8
1 /*
2
3 Copyright 2003, CyberTAN Inc. All Rights Reserved
4
5 This is UNPUBLISHED PROPRIETARY SOURCE CODE of CyberTAN Inc.
6 the contents of this file may not be disclosed to third parties,
7 copied or duplicated in any form without the prior written
8 permission of CyberTAN Inc.
9
10 This software should be used as a reference only, and it not
11 intended for production use!
12
13 THIS SOFTWARE IS OFFERED "AS IS", AND CYBERTAN GRANTS NO WARRANTIES OF ANY
14 KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. CYBERTAN
15 SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
16 FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE
17
18 */
19 /*
20
21 Copyright 2005, Broadcom Corporation
22 All Rights Reserved.
23
24 THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
25 KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
26 SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
27 FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
28
29 */
30 /*
31
32 Modified for Tomato Firmware
33 Portions, Copyright (C) 2006-2009 Jonathan Zarate
34
35 */
36
37 #include "rc.h"
38
39 #include <sys/ioctl.h>
40 #include <arpa/inet.h>
41 #include <sys/sysinfo.h>
42 #include <time.h>
43 #include <bcmdevs.h>
44
45 static const char ppp_linkfile[] = "/tmp/ppp/link";
46 static const char ppp_optfile[] = "/tmp/ppp/wanoptions";
47 #ifdef LINUX26
48 #ifdef TCONFIG_USB
49 static const char ppp3g_chatfile[] = "/tmp/ppp/connect.chat";
50 #endif
51 #endif
52
53 static void make_secrets(void)
54 {
55 FILE *f;
56 char *user;
57 char *pass;
58
59 user = nvram_safe_get("ppp_username");
60 pass = nvram_safe_get("ppp_passwd");
61 if ((f = fopen("/tmp/ppp/pap-secrets", "w")) != NULL) {
62 fprintf(f, "\"%s\" * \"%s\" *\n", user, pass);
63 fclose(f);
64 }
65 chmod("/tmp/ppp/pap-secrets", 0600);
66
67 if ((f = fopen("/tmp/ppp/chap-secrets", "w")) != NULL) {
68 fprintf(f, "\"%s\" * \"%s\" *\n", user, pass);
69 fclose(f);
70 }
71 chmod("/tmp/ppp/chap-secrets", 0600);
72 }
73
74 // -----------------------------------------------------------------------------
75
76 static int config_pppd(int wan_proto, int num)
77 {
78 TRACE_PT("begin\n");
79
80 FILE *fp;
81 FILE *cfp;
82 char *p;
83 int demand;
84
85 mkdir("/tmp/ppp", 0777);
86 symlink("/sbin/rc", "/tmp/ppp/ip-up");
87 symlink("/sbin/rc", "/tmp/ppp/ip-down");
88 #ifdef TCONFIG_IPV6
89 symlink("/sbin/rc", "/tmp/ppp/ipv6-up");
90 symlink("/sbin/rc", "/tmp/ppp/ipv6-down");
91 #endif
92 symlink("/dev/null", "/tmp/ppp/connect-errors");
93
94 demand = nvram_get_int("ppp_demand");
95
96 // Generate options file
97 if ((fp = fopen(ppp_optfile, "w")) == NULL) {
98 perror(ppp_optfile);
99 return -1;
100 }
101
102 #ifdef LINUX26
103 #ifdef TCONFIG_USB
104 if (nvram_match("wan_proto", "ppp3g") ) {
105 fprintf(fp,
106 "/dev/%s\n"
107 "460800\n"
108 "connect \"/usr/sbin/chat -V -t 60 -f %s\"\n"
109 "noipdefault\n"
110 "lock\n"
111 "crtscts\n"
112 "modem\n"
113 "ipcp-accept-local\n",
114 nvram_safe_get("modem_dev"),
115 ppp3g_chatfile);
116
117 if (strlen(nvram_get("ppp_username")) >0 )
118 fprintf(fp, "user '%s'\n", nvram_get("ppp_username"));
119 } else {
120 #endif
121 #endif
122 fprintf(fp,
123 "unit %d\n"
124 "user '%s'\n"
125 "lcp-echo-adaptive\n", // Suppress LCP echo-requests if traffic was received
126 num,
127 nvram_safe_get("ppp_username"));
128 #ifdef LINUX26
129 #ifdef TCONFIG_USB
130 }
131 #endif
132 #endif
133
134 fprintf(fp,
135 "defaultroute\n" // Add a default route to the system routing tables, using the peer as the gateway
136 "usepeerdns\n" // Ask the peer for up to 2 DNS server addresses
137 "default-asyncmap\n" // Disable asyncmap negotiation
138 "novj\n" // Disable Van Jacobson style TCP/IP header compression
139 "nobsdcomp\n" // Disable BSD-Compress compression
140 "nodeflate\n" // Disable Deflate compression
141 "noauth\n" // Do not authenticate peer
142 "refuse-eap\n" // Do not use eap
143 "maxfail 0\n" // Never give up
144 "lcp-echo-interval %d\n"// Interval between LCP echo-requests
145 "lcp-echo-failure %d\n" // Tolerance to unanswered echo-requests
146 "%s", // Debug
147 nvram_get_int("pppoe_lei") ? : 10,
148 nvram_get_int("pppoe_lef") ? : 5,
149 nvram_get_int("debug_ppp") ? "debug\n" : "");
150
151 #ifdef LINUX26
152 #ifdef TCONFIG_USB
153 if (nvram_match("wan_proto", "ppp3g") && nvram_match("modem_dev", "ttyACM0") ) {
154 //don`t write nopcomp and noaccomp options
155 } else {
156 #endif
157 #endif
158 fprintf(fp,
159 "nopcomp\n" // Disable protocol field compression
160 "noaccomp\n" // Disable Address/Control compression
161 );
162 #ifdef LINUX26
163 #ifdef TCONFIG_USB
164 }
165 #endif
166 #endif
167
168
169 if (wan_proto != WP_L2TP) {
170 fprintf(fp,
171 "persist\n"
172 "holdoff %d\n",
173 demand ? 30 : (nvram_get_int("ppp_redialperiod") ? : 30));
174 }
175
176 switch (wan_proto) {
177 case WP_PPTP:
178 fprintf(fp,
179 "plugin pptp.so\n"
180 "pptp_server %s\n"
181 "nomppe-stateful\n"
182 "mtu %d\n",
183 nvram_safe_get("pptp_server_ip"),
184 nvram_get_int("mtu_enable") ? nvram_get_int("wan_mtu") : 1400);
185 break;
186 case WP_PPPOE:
187 fprintf(fp,
188 "password '%s'\n"
189 "plugin rp-pppoe.so\n"
190 "nomppe nomppc\n"
191 "nic-%s\n"
192 "mru %d mtu %d\n",
193 nvram_safe_get("ppp_passwd"),
194 nvram_safe_get("wan_ifname"),
195 nvram_get_int("wan_mtu"), nvram_get_int("wan_mtu"));
196 if (((p = nvram_get("ppp_service")) != NULL) && (*p)) {
197 fprintf(fp, "rp_pppoe_service '%s'\n", p);
198 }
199 if (((p = nvram_get("ppp_ac")) != NULL) && (*p)) {
200 fprintf(fp, "rp_pppoe_ac '%s'\n", p);
201 }
202 if (nvram_match("ppp_mlppp", "1")) {
203 fprintf(fp, "mp\n");
204 }
205 break;
206 #ifdef LINUX26
207 #ifdef TCONFIG_USB
208 case WP_PPP3G:
209 if ((cfp = fopen(ppp3g_chatfile, "w")) == NULL) {
210 perror(ppp3g_chatfile);
211 return -1;
212 }
213 fprintf(cfp,
214 "ABORT \"NO CARRIER\"\n"
215 "ABORT \"NO DIALTONE\"\n"
216 "ABORT \"NO ERROR\"\n"
217 "ABORT \"NO ANSWER\"\n"
218 "ABORT \"BUSY\"\n"
219 "REPORT CONNECT\n"
220 "\"\" \"AT\"\n");
221 /* moved to switch3g script
222 if (strlen(nvram_get("modem_pin")) >0 ) {
223 fprintf(cfp,
224 "TIMEOUT 60\n"
225 "OK \"AT+CPIN=%s\"\n"
226 "TIMEOUT 10\n",
227 nvram_get("modem_pin"));
228 }
229 */
230 fprintf(cfp,
231 "OK \"AT&FE0V1X1&D2&C1S0=0\"\n"
232 "OK \"AT\"\n"
233 "OK \"ATS0=0\"\n"
234 "OK \"AT\"\n"
235 "OK \"AT&FE0V1X1&D2&C1S0=0\"\n"
236 "OK \"AT\"\n"
237 "OK 'AT+CGDCONT=1,\"IP\",\"%s\"'\n"
238 "OK \"ATDT%s\"\n"
239 "CONNECT \\c\n",
240 nvram_safe_get("modem_apn"),
241 nvram_safe_get("modem_init")
242 );
243 fclose(cfp);
244
245
246 if (nvram_match("usb_3g", "1")) {
247 // clear old gateway
248 if (strlen(nvram_get("wan_gateway")) >0 ) {
249 nvram_set("wan_gateway", "");
250 }
251
252 // detect 3G Modem
253 xstart("switch3g");
254 }
255 break;
256 #endif
257 #endif
258 case WP_L2TP:
259 fprintf(fp, "nomppe nomppc\n");
260 if (nvram_get_int("mtu_enable"))
261 fprintf(fp, "mtu %d\n", nvram_get_int("wan_mtu"));
262 break;
263 }
264
265 if (demand) {
266 // demand mode
267 fprintf(fp,
268 "demand\n" // Dial on demand
269 "idle %d\n"
270 "ipcp-accept-remote\n"
271 "ipcp-accept-local\n"
272 "noipdefault\n" // Disables the default behaviour when no local IP address is specified
273 "ktune\n", // Set /proc/sys/net/ipv4/ip_dynaddr to 1 in demand mode if the local address changes
274 nvram_get_int("ppp_idletime") * 60);
275 }
276
277 #ifdef TCONFIG_IPV6
278 switch (get_ipv6_service()) {
279 case IPV6_NATIVE:
280 case IPV6_NATIVE_DHCP:
281 fprintf(fp, "+ipv6\n");
282 break;
283 }
284 #endif
285 // User specific options
286 fprintf(fp, "%s\n", nvram_safe_get("ppp_custom"));
287
288 fclose(fp);
289 make_secrets();
290
291 TRACE_PT("end\n");
292 return 0;
293 }
294
295 static void stop_ppp(void)
296 {
297 TRACE_PT("begin\n");
298
299 unlink(ppp_linkfile);
300
301 killall_tk("ip-up");
302 killall_tk("ip-down");
303 #ifdef TCONFIG_IPV6
304 killall_tk("ipv6-up");
305 killall_tk("ipv6-down");
306 #endif
307 killall_tk("xl2tpd");
308 killall_tk("pppd");
309 killall_tk("listen");
310
311 TRACE_PT("end\n");
312 }
313
314 static void run_pppd(void)
315 {
316
317 eval("pppd", "file", (char *)ppp_optfile);
318
319 if (nvram_get_int("ppp_demand")) {
320 // demand mode
321 /*
322 Fixed issue id 7887(or 7787):
323 When DUT is PPTP Connect on Demand mode, it couldn't be trigger from LAN.
324 */
325 stop_dnsmasq();
326 dns_to_resolv();
327 start_dnsmasq();
328
329 // Trigger Connect On Demand if user ping pptp server
330 eval("listen", nvram_safe_get("lan_ifname"));
331 }
332 else {
333 // keepalive mode
334 start_redial();
335 }
336 }
337
338 // -----------------------------------------------------------------------------
339
340 inline void stop_pptp(void)
341 {
342 stop_ppp();
343 }
344
345 void start_pptp(int mode)
346 {
347 TRACE_PT("begin\n");
348
349 if (!using_dhcpc()) stop_dhcpc();
350 stop_pptp();
351
352 if (config_pppd(WP_PPTP, 0) != 0)
353 return;
354
355 run_pppd();
356
357 TRACE_PT("end\n");
358 }
359
360 // -----------------------------------------------------------------------------
361
362 void preset_wan(char *ifname, char *gw, char *netmask)
363 {
364 int i;
365
366 /* Delete all default routes */
367 route_del(ifname, 0, NULL, NULL, NULL);
368
369 /* try adding a route to gateway first */
370 route_add(ifname, 0, gw, NULL, "255.255.255.255");
371
372 /* Set default route to gateway if specified */
373 i = 5;
374 while ((route_add(ifname, 1, "0.0.0.0", gw, "0.0.0.0") == 1) && (i--)) {
375 sleep(1);
376 }
377 _dprintf("set default gateway=%s n=%d\n", gw, i);
378
379 /* Add routes to dns servers as well for demand ppp to work */
380 char word[100], *next;
381 in_addr_t mask = inet_addr(netmask);
382 foreach(word, nvram_safe_get("wan_get_dns"), next) {
383 if ((inet_addr(word) & mask) != (inet_addr(nvram_safe_get("wan_ipaddr")) & mask))
384 route_add(ifname, 0, word, gw, "255.255.255.255");
385 }
386
387 dns_to_resolv();
388 start_dnsmasq();
389 sleep(1);
390 start_firewall();
391 }
392
393 // -----------------------------------------------------------------------------
394
395
396 // Get the IP, Subnetmask, Geteway from WAN interface and set nvram
397 static void start_tmp_ppp(int num, char *ifname)
398 {
399 int timeout;
400 struct ifreq ifr;
401 int s;
402
403 TRACE_PT("begin: num=%d\n", num);
404
405 if (num != 0) return;
406
407 // Wait for ppp0 to be created
408 timeout = 15;
409 while ((ifconfig(ifname, IFUP, NULL, NULL) != 0) && (timeout-- > 0)) {
410 sleep(1);
411 _dprintf("[%d] waiting for %s %d...\n", __LINE__, ifname, timeout);
412 }
413
414 if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) return;
415 strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
416
417 // Set temporary IP address
418 timeout = 3;
419 while (ioctl(s, SIOCGIFADDR, &ifr) && timeout--){
420 _dprintf("[%d] waiting for %s...\n", __LINE__, ifname);
421 sleep(1);
422 };
423 nvram_set("wan_ipaddr", inet_ntoa(sin_addr(&(ifr.ifr_addr))));
424 nvram_set("wan_netmask", "255.255.255.255");
425
426 // Set temporary P-t-P address
427 timeout = 3;
428 while (ioctl(s, SIOCGIFDSTADDR, &ifr) && timeout--){
429 _dprintf("[%d] waiting for %s...\n", __LINE__, ifname);
430 sleep(1);
431 }
432 nvram_set("wan_gateway", inet_ntoa(sin_addr(&(ifr.ifr_dstaddr))));
433
434 close(s);
435
436 start_wan_done(ifname);
437 TRACE_PT("end\n");
438 }
439
440 void start_pppoe(int num)
441 {
442 char ifname[8];
443
444 TRACE_PT("begin pppoe_num=%d\n", num);
445
446 if (num != 0) return;
447
448 stop_pppoe();
449
450 snprintf(ifname, sizeof(ifname), "ppp%d", num);
451
452 #ifdef LINUX26
453 #ifdef TCONFIG_USB
454 if (nvram_match( "wan_proto", "ppp3g") ) {
455 if (config_pppd(WP_PPP3G, num) != 0)
456 return;
457 } else {
458 #endif
459 #endif
460 if (config_pppd(WP_PPPOE, num) != 0)
461 return;
462 #ifdef LINUX26
463 #ifdef TCONFIG_USB
464 }
465 #endif
466 #endif
467 run_pppd();
468
469 if (nvram_get_int("ppp_demand"))
470 start_tmp_ppp(num, ifname);
471 else
472 ifconfig(ifname, IFUP, NULL, NULL);
473
474 TRACE_PT("end\n");
475 }
476
477 void stop_pppoe(void)
478 {
479 stop_ppp();
480
481
482 }
483
484 #if 0
485 void stop_singe_pppoe(int num)
486 {
487 _dprintf("%s pppoe_num=%d\n", __FUNCTION__, num);
488
489 int i;
490
491 if (num != 0) return;
492
493 i = nvram_get_int("pppoe_pid0");
494 if ((i > 1) && (kill(i, SIGTERM) == 0)) {
495 do {
496 sleep(2);
497 } while (kill(i, SIGKILL) == 0);
498 }
499
500 unlink(ppp_linkfile);
501 nvram_unset("pppoe_ifname0");
502
503 nvram_set("wan_get_dns", "");
504 clear_resolv();
505 }
506 #endif
507
508 // -----------------------------------------------------------------------------
509
510 inline void stop_l2tp(void)
511 {
512 stop_ppp();
513 }
514
515 void start_l2tp(void)
516 {
517 TRACE_PT("begin\n");
518
519 FILE *fp;
520 int demand;
521
522 stop_l2tp();
523
524 if (config_pppd(WP_L2TP, 0) != 0)
525 return;
526
527 demand = nvram_get_int("ppp_demand");
528
529 /* Generate XL2TPD configuration file */
530 if ((fp = fopen("/etc/xl2tpd.conf", "w")) == NULL)
531 return;
532 fprintf(fp,
533 "[global]\n"
534 "access control = no\n"
535 "port = 1701\n"
536 "[lac l2tp]\n"
537 "lns = %s\n"
538 "tx bps = 100000000\n"
539 "pppoptfile = %s\n"
540 "redial = yes\n"
541 "max redials = 32767\n"
542 "redial timeout = %d\n"
543 "tunnel rws = 8\n"
544 "ppp debug = %s\n"
545 "%s\n",
546 nvram_safe_get("l2tp_server_ip"),
547 ppp_optfile,
548 demand ? 30 : (nvram_get_int("ppp_redialperiod") ? : 30),
549 nvram_get_int("debug_ppp") ? "yes" : "no",
550 nvram_safe_get("xl2tpd_custom"));
551 fappend(fp, "/etc/xl2tpd.custom");
552 fclose(fp);
553
554 enable_ip_forward();
555
556 eval("xl2tpd");
557
558 if (demand) {
559 eval("listen", nvram_safe_get("lan_ifname"));
560 }
561 else {
562 force_to_dial();
563 start_redial();
564 }
565
566 TRACE_PT("end\n");
567 }
568
569 // -----------------------------------------------------------------------------
570
571 char *wan_gateway(void)
572 {
573 char *gw = nvram_safe_get("wan_gateway_get");
574 if ((*gw == 0) || (strcmp(gw, "0.0.0.0") == 0))
575 gw = nvram_safe_get("wan_gateway");
576 return gw;
577 }
578
579 // -----------------------------------------------------------------------------
580
581 // trigger connect on demand
582 void force_to_dial(void)
583 {
584 TRACE_PT("begin\n");
585
586 sleep(1);
587 switch (get_wan_proto()) {
588 case WP_L2TP:
589 f_write_string("/var/run/l2tp-control", "c l2tp", 0, 0);
590 break;
591 case WP_PPTP:
592 eval("ping", "-c", "2", "10.112.112.112");
593 break;
594 case WP_DISABLED:
595 case WP_STATIC:
596 break;
597 default:
598 eval("ping", "-c", "2", wan_gateway());
599 break;
600 }
601
602 TRACE_PT("end\n");
603 }
604
605 // -----------------------------------------------------------------------------
606
607 static void _do_wan_routes(char *ifname, char *nvname, int metric, int add)
608 {
609 char *routes, *tmp;
610 int bits;
611 struct in_addr mask;
612 char netmask[16];
613
614 // IP[/MASK] ROUTER IP2[/MASK2] ROUTER2 ...
615 tmp = routes = strdup(nvram_safe_get(nvname));
616 while (tmp && *tmp) {
617 char *ipaddr, *gateway, *nmask;
618
619 ipaddr = nmask = strsep(&tmp, " ");
620 strcpy(netmask, "255.255.255.255");
621
622 if (nmask) {
623 ipaddr = strsep(&nmask, "/");
624 if (nmask && *nmask) {
625 bits = strtol(nmask, &nmask, 10);
626 if (bits >= 1 && bits <= 32) {
627 mask.s_addr = htonl(0xffffffff << (32 - bits));
628 strcpy(netmask, inet_ntoa(mask));
629 }
630 }
631 }
632 gateway = strsep(&tmp, " ");
633
634 if (gateway && *gateway) {
635 if (add)
636 route_add(ifname, metric, ipaddr, gateway, netmask);
637 else
638 route_del(ifname, metric, ipaddr, gateway, netmask);
639 }
640 }
641 free(routes);
642 }
643
644 void do_wan_routes(char *ifname, int metric, int add)
645 {
646 if (nvram_get_int("dhcp_routes")) {
647 // Static Routes: IP ROUTER IP2 ROUTER2 ...
648 // Classless Static Routes: IP/MASK ROUTER IP2/MASK2 ROUTER2 ...
649 _do_wan_routes(ifname, "wan_routes1", metric, add);
650 _do_wan_routes(ifname, "wan_routes2", metric, add);
651 }
652 }
653
654 // -----------------------------------------------------------------------------
655
656 const char wan_connecting[] = "/var/lib/misc/wan.connecting";
657
658 static int is_sta(int idx, int unit, int subunit, void *param)
659 {
660 char **p = param;
661
662 if (nvram_match(wl_nvname("mode", unit, subunit), "sta")) {
663 *p = nvram_safe_get(wl_nvname("ifname", unit, subunit));
664 return 1;
665 }
666 return 0;
667 }
668
669 void start_wan(int mode)
670 {
671 int wan_proto;
672 char *wan_ifname;
673 char *p = NULL;
674 struct ifreq ifr;
675 int sd;
676 int max;
677 int mtu;
678 char buf[128];
679 struct sysinfo si;
680 int vid;
681 int vid_map;
682 int vlan0tag;
683
684 TRACE_PT("begin\n");
685
686 sysinfo(&si);
687 f_write(wan_connecting, NULL, 0, 0, 0);
688
689 //
690
691 if (!foreach_wif(1, &p, is_sta)) {
692 p = nvram_safe_get("wan_ifnameX");
693 /* vlan ID mapping */
694 if (sscanf(p, "vlan%d", &vid) == 1) {
695 vlan0tag = nvram_get_int("vlan0tag");
696 snprintf(buf, sizeof(buf), "vlan%dvid", vid);
697 vid_map = nvram_get_int(buf);
698 if ((vid_map < 1) || (vid_map > 4094)) vid_map = vlan0tag | vid;
699 snprintf(buf, sizeof(buf), "vlan%d", vid_map);
700 p = buf;
701 }
702 set_mac(p, "mac_wan", 1);
703 }
704 nvram_set("wan_ifname", p);
705 nvram_set("wan_ifnames", p);
706
707 //
708
709 wan_ifname = nvram_safe_get("wan_ifname");
710 if (wan_ifname[0] == 0) {
711 wan_ifname = "none";
712 nvram_set("wan_ifname", wan_ifname);
713 }
714
715 if (strcmp(wan_ifname, "none") == 0) {
716 nvram_set("wan_proto", "disabled");
717 syslog(LOG_INFO, "No WAN");
718 }
719
720 //
721
722 wan_proto = get_wan_proto();
723
724 // set the default gateway for WAN interface
725 nvram_set("wan_gateway_get", nvram_safe_get("wan_gateway"));
726
727 if (wan_proto == WP_DISABLED) {
728 start_wan_done(wan_ifname);
729 return;
730 }
731
732 if ((sd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) {
733 perror("socket");
734 return;
735 }
736
737 // MTU
738
739 switch (wan_proto) {
740 case WP_PPPOE:
741 case WP_PPP3G:
742 max = 1492;
743 break;
744 case WP_PPTP:
745 case WP_L2TP:
746 max = 1460;
747 break;
748 default:
749 max = 1500;
750 break;
751 }
752 if (nvram_match("mtu_enable", "0")) {
753 mtu = max;
754 }
755 else {
756 mtu = nvram_get_int("wan_mtu");
757 if (!(nvram_get_int("jumbo_frame_enable")) && (mtu > max)) mtu = max;
758 else if (mtu < 576) mtu = 576;
759 }
760 sprintf(buf, "%d", mtu);
761 nvram_set("wan_mtu", buf);
762 nvram_set("wan_run_mtu", buf);
763
764 // 43011: zhijian 2006-12-25 for CD-Router v3.4 mtu bug of PPTP connection mode
765 /* if (wan_proto == WP_PPTP) {
766 mtu += 40;
767 } */ // commented out; checkme -- zzz
768
769 if (wan_proto != WP_PPTP && wan_proto != WP_L2TP && wan_proto != WP_PPPOE) {
770 // Don't set the MTU on the port for PPP connections, it will be set on the link instead
771 ifr.ifr_mtu = mtu;
772 strcpy(ifr.ifr_name, wan_ifname);
773 ioctl(sd, SIOCSIFMTU, &ifr);
774 }
775
776 //
777
778 ifconfig(wan_ifname, IFUP, NULL, NULL);
779
780 start_firewall();
781
782 set_host_domain_name();
783
784 switch (wan_proto) {
785 case WP_PPPOE:
786 case WP_PPP3G:
787 start_pppoe(PPPOE0);
788 break;
789 case WP_DHCP:
790 case WP_L2TP:
791 case WP_PPTP:
792 if (using_dhcpc()) {
793 stop_dhcpc();
794 start_dhcpc();
795 }
796 else if (wan_proto != WP_DHCP) {
797 ifconfig(wan_ifname, IFUP, "0.0.0.0", NULL);
798 ifconfig(wan_ifname, IFUP, nvram_safe_get("wan_ipaddr"), nvram_safe_get("wan_netmask"));
799
800 p = nvram_safe_get("wan_gateway");
801 if ((*p != 0) && (strcmp(p, "0.0.0.0") != 0))
802 preset_wan(wan_ifname, p, nvram_safe_get("wan_netmask"));
803
804 switch (wan_proto) {
805 case WP_PPTP:
806 start_pptp(mode);
807 break;
808 case WP_L2TP:
809 start_l2tp();
810 break;
811 }
812 }
813 break;
814 default: // static
815 nvram_set("wan_iface", wan_ifname);
816 ifconfig(wan_ifname, IFUP, nvram_safe_get("wan_ipaddr"), nvram_safe_get("wan_netmask"));
817
818 int r = 10;
819 while ((!check_wanup()) && (r-- > 0)) {
820 sleep(1);
821 }
822
823 start_wan_done(wan_ifname);
824 break;
825 }
826
827 // Get current WAN hardware address
828 strlcpy(ifr.ifr_name, wan_ifname, IFNAMSIZ);
829 if (ioctl(sd, SIOCGIFHWADDR, &ifr) == 0) {
830 nvram_set("wan_hwaddr", ether_etoa(ifr.ifr_hwaddr.sa_data, buf));
831 }
832
833 /* Set initial QoS mode again now that WAN port is ready. */
834 set_et_qos_mode(sd);
835
836 close(sd);
837
838 enable_ip_forward();
839
840 led(LED_DIAG, 0); // for 4712, 5325E (?)
841 led(LED_DMZ, nvram_match("dmz_enable", "1"));
842
843 TRACE_PT("end\n");
844 }
845
846 #ifdef TCONFIG_IPV6
847 void start_wan6_done(const char *wan_ifname)
848 {
849 struct in_addr addr4;
850 struct in6_addr addr;
851 static char addr6[INET6_ADDRSTRLEN];
852
853 int service = get_ipv6_service();
854
855 if (service != IPV6_DISABLED) {
856 if ((nvram_get_int("ipv6_accept_ra") & 1) != 0)
857 accept_ra(wan_ifname);
858 }
859
860 switch (service) {
861 case IPV6_NATIVE:
862 eval("ip", "route", "add", "::/0", "dev", (char *)wan_ifname, "metric", "2048");
863 break;
864 case IPV6_NATIVE_DHCP:
865 // eval("ip", "route", "add", "::/0", "dev", (char *)wan_ifname); //removed by Toastman
866 // see discussion at http://www.linksysinfo.org/index.php?threads/ipv6-and-comcast.38006/
867 // post #24 refers.
868 stop_dhcp6c();
869 start_dhcp6c();
870 break;
871 case IPV6_ANYCAST_6TO4:
872 case IPV6_6IN4:
873 stop_ipv6_tunnel();
874 if (service == IPV6_ANYCAST_6TO4) {
875 addr4.s_addr = 0;
876 memset(&addr, 0, sizeof(addr));
877 inet_aton(get_wanip(), &addr4);
878 addr.s6_addr16[0] = htons(0x2002);
879 ipv6_mapaddr4(&addr, 16, &addr4, 0);
880 addr.s6_addr16[3] = htons(0x0001);
881 inet_ntop(AF_INET6, &addr, addr6, sizeof(addr6));
882 nvram_set("ipv6_prefix", addr6);
883 }
884 start_ipv6_tunnel();
885 // FIXME: give it a few seconds for DAD completion
886 sleep(2);
887 break;
888 case IPV6_6RD:
889 case IPV6_6RD_DHCP:
890 stop_6rd_tunnel();
891 start_6rd_tunnel();
892 // FIXME2?: give it a few seconds for DAD completion
893 sleep(2);
894 break;
895 }
896 }
897 #endif
898
899 // ppp_demand: 0=keep alive, 1=connect on demand (run 'listen')
900 // wan_ifname: vlan1
901 // wan_iface: ppp# (PPPOE, PPP3G, PPTP, L2TP), vlan1 (DHCP, HB, Static)
902
903 void start_wan_done(char *wan_ifname)
904 {
905 int proto;
906 int n;
907 char *gw;
908 struct sysinfo si;
909 int wanup;
910
911 TRACE_PT("begin wan_ifname=%s\n", wan_ifname);
912
913 sysinfo(&si);
914 f_write("/var/lib/misc/wantime", &si.uptime, sizeof(si.uptime), 0, 0);
915
916 proto = get_wan_proto();
917
918 // delete all default routes
919 route_del(wan_ifname, 0, NULL, NULL, NULL);
920
921 if (proto != WP_DISABLED) {
922 // set default route to gateway if specified
923 gw = wan_gateway();
924 #if 0
925 if (proto == WP_PPTP && !using_dhcpc()) {
926 // For PPTP protocol, we must use ppp_get_ip as gateway, not pptp_server_ip (why ??)
927 if (*gw == 0 || strcmp(gw, "0.0.0.0") == 0) gw = nvram_safe_get("ppp_get_ip");
928 }
929 #endif
930 if ((*gw != 0) && (strcmp(gw, "0.0.0.0") != 0)) {
931 if (proto == WP_DHCP || proto == WP_STATIC) {
932 // possibly gateway is over the bridge, try adding a route to gateway first
933 route_add(wan_ifname, 0, gw, NULL, "255.255.255.255");
934 }
935
936 n = 5;
937 while ((route_add(wan_ifname, 0, "0.0.0.0", gw, "0.0.0.0") == 1) && (n--)) {
938 sleep(1);
939 }
940 _dprintf("set default gateway=%s n=%d\n", gw, n);
941
942 // hack: avoid routing cycles, when both peer and server have the same IP
943 if (proto == WP_PPTP || proto == WP_L2TP) {
944 // delete gateway route as it's no longer needed
945 route_del(wan_ifname, 0, gw, "0.0.0.0", "255.255.255.255");
946 }
947 }
948
949 #ifdef THREE_ARP_GRATUATOUS_SUPPORT // from 43011; checkme; commented-out -- zzz
950 /*
951 // 43011: Alpha add to send Gratuitous ARP when wan_proto is Static IP 2007-04-09
952 if (proto == WP_STATIC)
953 {
954 int ifindex;
955 u_int32_t wan_ip;
956 unsigned char wan_mac[6];
957
958 if (read_iface(nvram_safe_get("wan_iface"), &ifindex, &wan_ip, wan_mac) >= 0)
959 arpping(wan_ip, wan_ip, wan_mac, nvram_safe_get("wan_iface"));
960 }
961 */
962 #endif
963
964 if (proto == WP_PPTP || proto == WP_L2TP) {
965 route_del(nvram_safe_get("wan_iface"), 0, nvram_safe_get("wan_gateway_get"), NULL, "255.255.255.255");
966 route_add(nvram_safe_get("wan_iface"), 0, nvram_safe_get("ppp_get_ip"), NULL, "255.255.255.255");
967 }
968 if (proto == WP_L2TP) {
969 route_add(nvram_safe_get("wan_ifname"), 0, nvram_safe_get("l2tp_server_ip"), nvram_safe_get("wan_gateway"), "255.255.255.255"); // fixed routing problem in Israel by kanki
970 }
971 }
972
973 dns_to_resolv();
974 start_dnsmasq();
975 start_firewall();
976 start_qos();
977 start_arpbind();
978
979
980 do_static_routes(1);
981 // and routes supplied via DHCP
982 do_wan_routes(using_dhcpc() ? nvram_safe_get("wan_ifname") : wan_ifname, 0, 1);
983
984 stop_zebra();
985 start_zebra();
986
987 wanup = check_wanup();
988
989 if ((wanup) || (time(0) < Y2K)) {
990 stop_ntpc();
991 start_ntpc();
992 }
993
994 if ((wanup) || (proto == WP_DISABLED)) {
995 stop_ddns();
996 start_ddns();
997 stop_igmp_proxy();
998 stop_udpxy();
999 start_igmp_proxy();
1000 start_udpxy();
1001 }
1002
1003 #ifdef TCONFIG_IPV6
1004 start_wan6_done(get_wan6face());
1005 #endif
1006
1007 stop_upnp();
1008 start_upnp();
1009
1010 // restart httpd
1011 start_httpd();
1012
1013 if (wanup) {
1014 SET_LED(GOT_IP);
1015 notice_set("wan", "");
1016
1017 run_nvscript("script_wanup", NULL, 0);
1018 }
1019
1020 // We don't need STP after wireless led is lighted // no idea why... toggling it if necessary -- zzz
1021 if (check_hw_type() == HW_BCM4702) {
1022 eval("brctl", "stp", nvram_safe_get("lan_ifname"), "0");
1023 if (nvram_match("lan_stp", "1"))
1024 eval("brctl", "stp", nvram_safe_get("lan_ifname"), "1");
1025 #ifdef TCONFIG_VLAN
1026 if(strcmp(nvram_safe_get("lan1_ifname"),"")!=0) {
1027 eval("brctl", "stp", nvram_safe_get("lan1_ifname"), "0");
1028 if (nvram_match("lan1_stp", "1"))
1029 eval("brctl", "stp", nvram_safe_get("lan1_ifname"), "1");
1030 }
1031 if(strcmp(nvram_safe_get("lan2_ifname"),"")!=0) {
1032 eval("brctl", "stp", nvram_safe_get("lan2_ifname"), "0");
1033 if (nvram_match("lan2_stp", "1"))
1034 eval("brctl", "stp", nvram_safe_get("lan2_ifname"), "1");
1035 }
1036 if(strcmp(nvram_safe_get("lan3_ifname"),"")!=0) {
1037 eval("brctl", "stp", nvram_safe_get("lan3_ifname"), "0");
1038 if (nvram_match("lan3_stp", "1"))
1039 eval("brctl", "stp", nvram_safe_get("lan3_ifname"), "1");
1040 }
1041 #endif
1042 }
1043
1044 if (wanup)
1045 start_vpn_eas();
1046
1047 #ifdef TCONFIG_USERPPTP
1048 if (wanup && nvram_get_int("pptp_client_enable"))
1049 start_pptp_client();
1050 #endif
1051
1052 unlink(wan_connecting);
1053
1054 new_qoslimit_start(); //!! RAF
1055
1056 TRACE_PT("end\n");
1057 }
1058
1059 void stop_wan(void)
1060 {
1061 char name[80];
1062 char *next;
1063
1064 TRACE_PT("begin\n");
1065
1066 #ifdef TCONFIG_USERPPTP
1067 stop_pptp_client();
1068 stop_dnsmasq();
1069 dns_to_resolv();
1070 start_dnsmasq();
1071 #endif
1072 stop_arpbind();
1073
1074 new_qoslimit_stop(); //!! RAF
1075
1076 stop_qos();
1077 stop_upnp(); //!!TB - moved from stop_services()
1078 stop_firewall();
1079 stop_igmp_proxy();
1080 stop_udpxy();
1081 stop_ntpc();
1082
1083 #ifdef TCONFIG_IPV6
1084 stop_ipv6_tunnel();
1085 stop_dhcp6c();
1086 nvram_set("ipv6_get_dns", "");
1087 #endif
1088
1089 /* Kill any WAN client daemons or callbacks */
1090 stop_redial();
1091 stop_pppoe();
1092 stop_ppp();
1093 stop_dhcpc();
1094 stop_vpn_eas();
1095 clear_resolv();
1096 nvram_set("wan_get_dns", "");
1097
1098 /* Bring down WAN interfaces */
1099 foreach(name, nvram_safe_get("wan_ifnames"), next)
1100 ifconfig(name, 0, "0.0.0.0", NULL);
1101
1102 SET_LED(RELEASE_IP);
1103 //notice_set("wan", "");
1104 unlink("/var/notice/wan");
1105 unlink(wan_connecting);
1106
1107 TRACE_PT("end\n");
1108 }
Tomato firmware and modifications.