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36#include <linux/types.h>
37#include <linux/string.h>
38#include <linux/kernel.h>
39#include <linux/jiffies.h>
40#include <linux/random.h>
41#include <linux/init.h>
42#include <linux/utsname.h>
43#include <linux/in.h>
44#include <linux/if.h>
45#include <linux/inet.h>
46#include <linux/inetdevice.h>
47#include <linux/netdevice.h>
48#include <linux/if_arp.h>
49#include <linux/skbuff.h>
50#include <linux/ip.h>
51#include <linux/socket.h>
52#include <linux/route.h>
53#include <linux/udp.h>
54#include <linux/proc_fs.h>
55#include <linux/seq_file.h>
56#include <linux/major.h>
57#include <linux/root_dev.h>
58#include <linux/delay.h>
59#include <linux/nfs_fs.h>
60#include <linux/slab.h>
61#include <linux/export.h>
62#include <net/net_namespace.h>
63#include <net/arp.h>
64#include <net/ip.h>
65#include <net/ipconfig.h>
66#include <net/route.h>
67
68#include <linux/uaccess.h>
69#include <net/checksum.h>
70#include <asm/processor.h>
71
72#if defined(CONFIG_IP_PNP_DHCP)
73#define IPCONFIG_DHCP
74#endif
75#if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP)
76#define IPCONFIG_BOOTP
77#endif
78#if defined(CONFIG_IP_PNP_RARP)
79#define IPCONFIG_RARP
80#endif
81#if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP)
82#define IPCONFIG_DYNAMIC
83#endif
84
85
86#define CONF_POST_OPEN 10
87
88
89#define CONF_OPEN_RETRIES 2
90#define CONF_SEND_RETRIES 6
91#define CONF_BASE_TIMEOUT (HZ*2)
92#define CONF_TIMEOUT_RANDOM (HZ)
93#define CONF_TIMEOUT_MULT *7/4
94#define CONF_TIMEOUT_MAX (HZ*30)
95#define CONF_NAMESERVERS_MAX 3
96
97#define CONF_NTP_SERVERS_MAX 3
98
99#define NONE cpu_to_be32(INADDR_NONE)
100#define ANY cpu_to_be32(INADDR_ANY)
101
102
103static unsigned int carrier_timeout = 120;
104
105
106
107
108
109
110
111
112
113int ic_set_manually __initdata = 0;
114
115static int ic_enable __initdata;
116
117
118int ic_proto_enabled __initdata = 0
119#ifdef IPCONFIG_BOOTP
120 | IC_BOOTP
121#endif
122#ifdef CONFIG_IP_PNP_DHCP
123 | IC_USE_DHCP
124#endif
125#ifdef IPCONFIG_RARP
126 | IC_RARP
127#endif
128 ;
129
130static int ic_host_name_set __initdata;
131
132__be32 ic_myaddr = NONE;
133static __be32 ic_netmask = NONE;
134__be32 ic_gateway = NONE;
135
136#ifdef IPCONFIG_DYNAMIC
137static __be32 ic_addrservaddr = NONE;
138#endif
139
140__be32 ic_servaddr = NONE;
141
142__be32 root_server_addr = NONE;
143u8 root_server_path[256] = { 0, };
144
145
146static char vendor_class_identifier[253] __initdata;
147
148#if defined(CONFIG_IP_PNP_DHCP)
149static char dhcp_client_identifier[253] __initdata;
150#endif
151
152
153
154#ifdef IPCONFIG_DYNAMIC
155static int ic_proto_used;
156#else
157#define ic_proto_used 0
158#endif
159static __be32 ic_nameservers[CONF_NAMESERVERS_MAX];
160static __be32 ic_ntp_servers[CONF_NTP_SERVERS_MAX];
161static u8 ic_domain[64];
162
163
164
165
166
167
168static char user_dev_name[IFNAMSIZ] __initdata = { 0, };
169
170
171static int ic_proto_have_if __initdata;
172
173
174static int ic_dev_mtu __initdata;
175
176#ifdef IPCONFIG_DYNAMIC
177static DEFINE_SPINLOCK(ic_recv_lock);
178static volatile int ic_got_reply __initdata;
179#endif
180#ifdef IPCONFIG_DHCP
181static int ic_dhcp_msgtype __initdata;
182#endif
183
184
185
186
187
188
189struct ic_device {
190 struct ic_device *next;
191 struct net_device *dev;
192 unsigned short flags;
193 short able;
194 __be32 xid;
195};
196
197static struct ic_device *ic_first_dev __initdata;
198static struct ic_device *ic_dev __initdata;
199
200static bool __init ic_is_init_dev(struct net_device *dev)
201{
202 if (dev->flags & IFF_LOOPBACK)
203 return false;
204 return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
205 (!(dev->flags & IFF_LOOPBACK) &&
206 (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) &&
207 strncmp(dev->name, "dummy", 5));
208}
209
210static int __init ic_open_devs(void)
211{
212 struct ic_device *d, **last;
213 struct net_device *dev;
214 unsigned short oflags;
215 unsigned long start, next_msg;
216
217 last = &ic_first_dev;
218 rtnl_lock();
219
220
221 for_each_netdev(&init_net, dev) {
222 if (!(dev->flags & IFF_LOOPBACK))
223 continue;
224 if (dev_change_flags(dev, dev->flags | IFF_UP, NULL) < 0)
225 pr_err("IP-Config: Failed to open %s\n", dev->name);
226 }
227
228 for_each_netdev(&init_net, dev) {
229 if (ic_is_init_dev(dev)) {
230 int able = 0;
231 if (dev->mtu >= 364)
232 able |= IC_BOOTP;
233 else
234 pr_warn("DHCP/BOOTP: Ignoring device %s, MTU %d too small\n",
235 dev->name, dev->mtu);
236 if (!(dev->flags & IFF_NOARP))
237 able |= IC_RARP;
238 able &= ic_proto_enabled;
239 if (ic_proto_enabled && !able)
240 continue;
241 oflags = dev->flags;
242 if (dev_change_flags(dev, oflags | IFF_UP, NULL) < 0) {
243 pr_err("IP-Config: Failed to open %s\n",
244 dev->name);
245 continue;
246 }
247 if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) {
248 rtnl_unlock();
249 return -ENOMEM;
250 }
251 d->dev = dev;
252 *last = d;
253 last = &d->next;
254 d->flags = oflags;
255 d->able = able;
256 if (able & IC_BOOTP)
257 get_random_bytes(&d->xid, sizeof(__be32));
258 else
259 d->xid = 0;
260 ic_proto_have_if |= able;
261 pr_debug("IP-Config: %s UP (able=%d, xid=%08x)\n",
262 dev->name, able, d->xid);
263 }
264 }
265
266
267 if (!ic_first_dev)
268 goto have_carrier;
269
270
271 start = jiffies;
272 next_msg = start + msecs_to_jiffies(20000);
273 while (time_before(jiffies, start +
274 msecs_to_jiffies(carrier_timeout * 1000))) {
275 int wait, elapsed;
276
277 for_each_netdev(&init_net, dev)
278 if (ic_is_init_dev(dev) && netif_carrier_ok(dev))
279 goto have_carrier;
280
281 msleep(1);
282
283 if (time_before(jiffies, next_msg))
284 continue;
285
286 elapsed = jiffies_to_msecs(jiffies - start);
287 wait = (carrier_timeout * 1000 - elapsed + 500) / 1000;
288 pr_info("Waiting up to %d more seconds for network.\n", wait);
289 next_msg = jiffies + msecs_to_jiffies(20000);
290 }
291have_carrier:
292 rtnl_unlock();
293
294 *last = NULL;
295
296 if (!ic_first_dev) {
297 if (user_dev_name[0])
298 pr_err("IP-Config: Device `%s' not found\n",
299 user_dev_name);
300 else
301 pr_err("IP-Config: No network devices available\n");
302 return -ENODEV;
303 }
304 return 0;
305}
306
307
308
309
310static void __init ic_close_devs(void)
311{
312 struct net_device *selected_dev = ic_dev ? ic_dev->dev : NULL;
313 struct ic_device *d, *next;
314 struct net_device *dev;
315
316 rtnl_lock();
317 next = ic_first_dev;
318 while ((d = next)) {
319 bool bring_down = (d != ic_dev);
320 struct net_device *lower;
321 struct list_head *iter;
322
323 next = d->next;
324 dev = d->dev;
325
326 if (selected_dev) {
327 netdev_for_each_lower_dev(selected_dev, lower, iter) {
328 if (dev == lower) {
329 bring_down = false;
330 break;
331 }
332 }
333 }
334 if (bring_down) {
335 pr_debug("IP-Config: Downing %s\n", dev->name);
336 dev_change_flags(dev, d->flags, NULL);
337 }
338 kfree(d);
339 }
340 rtnl_unlock();
341}
342
343
344
345
346
347static inline void
348set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port)
349{
350 sin->sin_family = AF_INET;
351 sin->sin_addr.s_addr = addr;
352 sin->sin_port = port;
353}
354
355
356
357
358
359static int __init ic_setup_if(void)
360{
361 struct ifreq ir;
362 struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr;
363 int err;
364
365 memset(&ir, 0, sizeof(ir));
366 strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->dev->name);
367 set_sockaddr(sin, ic_myaddr, 0);
368 if ((err = devinet_ioctl(&init_net, SIOCSIFADDR, &ir)) < 0) {
369 pr_err("IP-Config: Unable to set interface address (%d)\n",
370 err);
371 return -1;
372 }
373 set_sockaddr(sin, ic_netmask, 0);
374 if ((err = devinet_ioctl(&init_net, SIOCSIFNETMASK, &ir)) < 0) {
375 pr_err("IP-Config: Unable to set interface netmask (%d)\n",
376 err);
377 return -1;
378 }
379 set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0);
380 if ((err = devinet_ioctl(&init_net, SIOCSIFBRDADDR, &ir)) < 0) {
381 pr_err("IP-Config: Unable to set interface broadcast address (%d)\n",
382 err);
383 return -1;
384 }
385
386
387
388
389 if (ic_dev_mtu != 0) {
390 rtnl_lock();
391 if ((err = dev_set_mtu(ic_dev->dev, ic_dev_mtu)) < 0)
392 pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n",
393 ic_dev_mtu, err);
394 rtnl_unlock();
395 }
396 return 0;
397}
398
399static int __init ic_setup_routes(void)
400{
401
402
403 if (ic_gateway != NONE) {
404 struct rtentry rm;
405 int err;
406
407 memset(&rm, 0, sizeof(rm));
408 if ((ic_gateway ^ ic_myaddr) & ic_netmask) {
409 pr_err("IP-Config: Gateway not on directly connected network\n");
410 return -1;
411 }
412 set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0);
413 set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0);
414 set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0);
415 rm.rt_flags = RTF_UP | RTF_GATEWAY;
416 if ((err = ip_rt_ioctl(&init_net, SIOCADDRT, &rm)) < 0) {
417 pr_err("IP-Config: Cannot add default route (%d)\n",
418 err);
419 return -1;
420 }
421 }
422
423 return 0;
424}
425
426
427
428
429
430static int __init ic_defaults(void)
431{
432
433
434
435
436
437 if (!ic_host_name_set)
438 sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr);
439
440 if (root_server_addr == NONE)
441 root_server_addr = ic_servaddr;
442
443 if (ic_netmask == NONE) {
444 if (IN_CLASSA(ntohl(ic_myaddr)))
445 ic_netmask = htonl(IN_CLASSA_NET);
446 else if (IN_CLASSB(ntohl(ic_myaddr)))
447 ic_netmask = htonl(IN_CLASSB_NET);
448 else if (IN_CLASSC(ntohl(ic_myaddr)))
449 ic_netmask = htonl(IN_CLASSC_NET);
450 else if (IN_CLASSE(ntohl(ic_myaddr)))
451 ic_netmask = htonl(IN_CLASSE_NET);
452 else {
453 pr_err("IP-Config: Unable to guess netmask for address %pI4\n",
454 &ic_myaddr);
455 return -1;
456 }
457 pr_notice("IP-Config: Guessing netmask %pI4\n",
458 &ic_netmask);
459 }
460
461 return 0;
462}
463
464
465
466
467
468#ifdef IPCONFIG_RARP
469
470static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
471
472static struct packet_type rarp_packet_type __initdata = {
473 .type = cpu_to_be16(ETH_P_RARP),
474 .func = ic_rarp_recv,
475};
476
477static inline void __init ic_rarp_init(void)
478{
479 dev_add_pack(&rarp_packet_type);
480}
481
482static inline void __init ic_rarp_cleanup(void)
483{
484 dev_remove_pack(&rarp_packet_type);
485}
486
487
488
489
490static int __init
491ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
492{
493 struct arphdr *rarp;
494 unsigned char *rarp_ptr;
495 __be32 sip, tip;
496 unsigned char *tha;
497 struct ic_device *d;
498
499 if (!net_eq(dev_net(dev), &init_net))
500 goto drop;
501
502 skb = skb_share_check(skb, GFP_ATOMIC);
503 if (!skb)
504 return NET_RX_DROP;
505
506 if (!pskb_may_pull(skb, sizeof(struct arphdr)))
507 goto drop;
508
509
510 rarp = (struct arphdr *)skb_transport_header(skb);
511
512
513
514
515 if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd))
516 goto drop;
517
518
519 if (rarp->ar_op != htons(ARPOP_RREPLY))
520 goto drop;
521
522
523 if (rarp->ar_pro != htons(ETH_P_IP))
524 goto drop;
525
526 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
527 goto drop;
528
529
530 rarp = (struct arphdr *)skb_transport_header(skb);
531 rarp_ptr = (unsigned char *) (rarp + 1);
532
533
534 spin_lock(&ic_recv_lock);
535
536
537 if (ic_got_reply)
538 goto drop_unlock;
539
540
541 d = ic_first_dev;
542 while (d && d->dev != dev)
543 d = d->next;
544 if (!d)
545 goto drop_unlock;
546
547
548 rarp_ptr += dev->addr_len;
549 memcpy(&sip, rarp_ptr, 4);
550 rarp_ptr += 4;
551 tha = rarp_ptr;
552 rarp_ptr += dev->addr_len;
553 memcpy(&tip, rarp_ptr, 4);
554
555
556 if (memcmp(tha, dev->dev_addr, dev->addr_len))
557 goto drop_unlock;
558
559
560 if (ic_servaddr != NONE && ic_servaddr != sip)
561 goto drop_unlock;
562
563
564 ic_dev = d;
565 if (ic_myaddr == NONE)
566 ic_myaddr = tip;
567 ic_servaddr = sip;
568 ic_addrservaddr = sip;
569 ic_got_reply = IC_RARP;
570
571drop_unlock:
572
573 spin_unlock(&ic_recv_lock);
574
575drop:
576
577 kfree_skb(skb);
578 return 0;
579}
580
581
582
583
584
585static void __init ic_rarp_send_if(struct ic_device *d)
586{
587 struct net_device *dev = d->dev;
588 arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL,
589 dev->dev_addr, dev->dev_addr);
590}
591#endif
592
593
594
595
596static inline void __init ic_nameservers_predef(void)
597{
598 int i;
599
600 for (i = 0; i < CONF_NAMESERVERS_MAX; i++)
601 ic_nameservers[i] = NONE;
602}
603
604
605static inline void __init ic_ntp_servers_predef(void)
606{
607 int i;
608
609 for (i = 0; i < CONF_NTP_SERVERS_MAX; i++)
610 ic_ntp_servers[i] = NONE;
611}
612
613
614
615
616
617#ifdef IPCONFIG_BOOTP
618
619struct bootp_pkt {
620 struct iphdr iph;
621 struct udphdr udph;
622 u8 op;
623 u8 htype;
624 u8 hlen;
625 u8 hops;
626 __be32 xid;
627 __be16 secs;
628 __be16 flags;
629 __be32 client_ip;
630 __be32 your_ip;
631 __be32 server_ip;
632 __be32 relay_ip;
633 u8 hw_addr[16];
634 u8 serv_name[64];
635 u8 boot_file[128];
636 u8 exten[312];
637};
638
639
640#define BOOTP_REQUEST 1
641#define BOOTP_REPLY 2
642
643
644#define DHCPDISCOVER 1
645#define DHCPOFFER 2
646#define DHCPREQUEST 3
647#define DHCPDECLINE 4
648#define DHCPACK 5
649#define DHCPNAK 6
650#define DHCPRELEASE 7
651#define DHCPINFORM 8
652
653static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
654
655static struct packet_type bootp_packet_type __initdata = {
656 .type = cpu_to_be16(ETH_P_IP),
657 .func = ic_bootp_recv,
658};
659
660
661
662
663
664static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 };
665
666#ifdef IPCONFIG_DHCP
667
668static void __init
669ic_dhcp_init_options(u8 *options, struct ic_device *d)
670{
671 u8 mt = ((ic_servaddr == NONE)
672 ? DHCPDISCOVER : DHCPREQUEST);
673 u8 *e = options;
674 int len;
675
676 pr_debug("DHCP: Sending message type %d (%s)\n", mt, d->dev->name);
677
678 memcpy(e, ic_bootp_cookie, 4);
679 e += 4;
680
681 *e++ = 53;
682 *e++ = 1;
683 *e++ = mt;
684
685 if (mt == DHCPREQUEST) {
686 *e++ = 54;
687 *e++ = 4;
688 memcpy(e, &ic_servaddr, 4);
689 e += 4;
690
691 *e++ = 50;
692 *e++ = 4;
693 memcpy(e, &ic_myaddr, 4);
694 e += 4;
695 }
696
697
698 {
699 static const u8 ic_req_params[] = {
700 1,
701 3,
702 6,
703 12,
704 15,
705 17,
706 26,
707 40,
708 42,
709 };
710
711 *e++ = 55;
712 *e++ = sizeof(ic_req_params);
713 memcpy(e, ic_req_params, sizeof(ic_req_params));
714 e += sizeof(ic_req_params);
715
716 if (ic_host_name_set) {
717 *e++ = 12;
718 len = strlen(utsname()->nodename);
719 *e++ = len;
720 memcpy(e, utsname()->nodename, len);
721 e += len;
722 }
723 if (*vendor_class_identifier) {
724 pr_info("DHCP: sending class identifier \"%s\"\n",
725 vendor_class_identifier);
726 *e++ = 60;
727 len = strlen(vendor_class_identifier);
728 *e++ = len;
729 memcpy(e, vendor_class_identifier, len);
730 e += len;
731 }
732 len = strlen(dhcp_client_identifier + 1);
733
734
735
736 if (len >= 1 && len < 312 - (e - options) - 1) {
737 *e++ = 61;
738 *e++ = len + 1;
739 memcpy(e, dhcp_client_identifier, len + 1);
740 e += len + 1;
741 }
742 }
743
744 *e++ = 255;
745}
746
747#endif
748
749static void __init ic_bootp_init_ext(u8 *e)
750{
751 memcpy(e, ic_bootp_cookie, 4);
752 e += 4;
753 *e++ = 1;
754 *e++ = 4;
755 e += 4;
756 *e++ = 3;
757 *e++ = 4;
758 e += 4;
759#if CONF_NAMESERVERS_MAX > 0
760 *e++ = 6;
761 *e++ = 4 * CONF_NAMESERVERS_MAX;
762 e += 4 * CONF_NAMESERVERS_MAX;
763#endif
764 *e++ = 12;
765 *e++ = 32;
766 e += 32;
767 *e++ = 40;
768 *e++ = 32;
769 e += 32;
770 *e++ = 17;
771 *e++ = 40;
772 e += 40;
773
774 *e++ = 57;
775 *e++ = 2;
776 *e++ = 1;
777 *e++ = 150;
778
779 *e++ = 255;
780}
781
782
783
784
785
786static inline void __init ic_bootp_init(void)
787{
788
789
790
791
792
793 ic_nameservers_predef();
794 ic_ntp_servers_predef();
795
796 dev_add_pack(&bootp_packet_type);
797}
798
799
800
801
802
803static inline void __init ic_bootp_cleanup(void)
804{
805 dev_remove_pack(&bootp_packet_type);
806}
807
808
809
810
811
812static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff)
813{
814 struct net_device *dev = d->dev;
815 struct sk_buff *skb;
816 struct bootp_pkt *b;
817 struct iphdr *h;
818 int hlen = LL_RESERVED_SPACE(dev);
819 int tlen = dev->needed_tailroom;
820
821
822 skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15,
823 GFP_KERNEL);
824 if (!skb)
825 return;
826 skb_reserve(skb, hlen);
827 b = skb_put_zero(skb, sizeof(struct bootp_pkt));
828
829
830 skb_reset_network_header(skb);
831 h = ip_hdr(skb);
832 h->version = 4;
833 h->ihl = 5;
834 h->tot_len = htons(sizeof(struct bootp_pkt));
835 h->frag_off = htons(IP_DF);
836 h->ttl = 64;
837 h->protocol = IPPROTO_UDP;
838 h->daddr = htonl(INADDR_BROADCAST);
839 h->check = ip_fast_csum((unsigned char *) h, h->ihl);
840
841
842 b->udph.source = htons(68);
843 b->udph.dest = htons(67);
844 b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr));
845
846
847
848 b->op = BOOTP_REQUEST;
849 if (dev->type < 256)
850 b->htype = dev->type;
851 else if (dev->type == ARPHRD_FDDI)
852 b->htype = ARPHRD_ETHER;
853 else {
854 pr_warn("Unknown ARP type 0x%04x for device %s\n", dev->type,
855 dev->name);
856 b->htype = dev->type;
857 }
858
859
860 b->hlen = dev->addr_len;
861 memcpy(b->hw_addr, dev->dev_addr, dev->addr_len);
862 b->secs = htons(jiffies_diff / HZ);
863 b->xid = d->xid;
864
865
866#ifdef IPCONFIG_DHCP
867 if (ic_proto_enabled & IC_USE_DHCP)
868 ic_dhcp_init_options(b->exten, d);
869 else
870#endif
871 ic_bootp_init_ext(b->exten);
872
873
874 skb->dev = dev;
875 skb->protocol = htons(ETH_P_IP);
876 if (dev_hard_header(skb, dev, ntohs(skb->protocol),
877 dev->broadcast, dev->dev_addr, skb->len) < 0) {
878 kfree_skb(skb);
879 printk("E");
880 return;
881 }
882
883 if (dev_queue_xmit(skb) < 0)
884 printk("E");
885}
886
887
888
889
890
891static int __init ic_bootp_string(char *dest, char *src, int len, int max)
892{
893 if (!len)
894 return 0;
895 if (len > max-1)
896 len = max-1;
897 memcpy(dest, src, len);
898 dest[len] = '\0';
899 return 1;
900}
901
902
903
904
905
906static void __init ic_do_bootp_ext(u8 *ext)
907{
908 u8 servers;
909 int i;
910 __be16 mtu;
911
912 u8 *c;
913
914 pr_debug("DHCP/BOOTP: Got extension %d:", *ext);
915 for (c=ext+2; c<ext+2+ext[1]; c++)
916 pr_debug(" %02x", *c);
917 pr_debug("\n");
918
919 switch (*ext++) {
920 case 1:
921 if (ic_netmask == NONE)
922 memcpy(&ic_netmask, ext+1, 4);
923 break;
924 case 3:
925 if (ic_gateway == NONE)
926 memcpy(&ic_gateway, ext+1, 4);
927 break;
928 case 6:
929 servers= *ext/4;
930 if (servers > CONF_NAMESERVERS_MAX)
931 servers = CONF_NAMESERVERS_MAX;
932 for (i = 0; i < servers; i++) {
933 if (ic_nameservers[i] == NONE)
934 memcpy(&ic_nameservers[i], ext+1+4*i, 4);
935 }
936 break;
937 case 12:
938 if (!ic_host_name_set) {
939 ic_bootp_string(utsname()->nodename, ext+1, *ext,
940 __NEW_UTS_LEN);
941 ic_host_name_set = 1;
942 }
943 break;
944 case 15:
945 if (!ic_domain[0])
946 ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain));
947 break;
948 case 17:
949 if (!root_server_path[0])
950 ic_bootp_string(root_server_path, ext+1, *ext,
951 sizeof(root_server_path));
952 break;
953 case 26:
954 memcpy(&mtu, ext+1, sizeof(mtu));
955 ic_dev_mtu = ntohs(mtu);
956 break;
957 case 40:
958 ic_bootp_string(utsname()->domainname, ext+1, *ext,
959 __NEW_UTS_LEN);
960 break;
961 case 42:
962 servers = *ext / 4;
963 if (servers > CONF_NTP_SERVERS_MAX)
964 servers = CONF_NTP_SERVERS_MAX;
965 for (i = 0; i < servers; i++) {
966 if (ic_ntp_servers[i] == NONE)
967 memcpy(&ic_ntp_servers[i], ext+1+4*i, 4);
968 }
969 break;
970 }
971}
972
973
974
975
976
977static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
978{
979 struct bootp_pkt *b;
980 struct iphdr *h;
981 struct ic_device *d;
982 int len, ext_len;
983
984 if (!net_eq(dev_net(dev), &init_net))
985 goto drop;
986
987
988 if (skb->pkt_type == PACKET_OTHERHOST)
989 goto drop;
990
991 skb = skb_share_check(skb, GFP_ATOMIC);
992 if (!skb)
993 return NET_RX_DROP;
994
995 if (!pskb_may_pull(skb,
996 sizeof(struct iphdr) +
997 sizeof(struct udphdr)))
998 goto drop;
999
1000 b = (struct bootp_pkt *)skb_network_header(skb);
1001 h = &b->iph;
1002
1003 if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP)
1004 goto drop;
1005
1006
1007 if (ip_is_fragment(h)) {
1008 net_err_ratelimited("DHCP/BOOTP: Ignoring fragmented reply\n");
1009 goto drop;
1010 }
1011
1012 if (skb->len < ntohs(h->tot_len))
1013 goto drop;
1014
1015 if (ip_fast_csum((char *) h, h->ihl))
1016 goto drop;
1017
1018 if (b->udph.source != htons(67) || b->udph.dest != htons(68))
1019 goto drop;
1020
1021 if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr))
1022 goto drop;
1023
1024 len = ntohs(b->udph.len) - sizeof(struct udphdr);
1025 ext_len = len - (sizeof(*b) -
1026 sizeof(struct iphdr) -
1027 sizeof(struct udphdr) -
1028 sizeof(b->exten));
1029 if (ext_len < 0)
1030 goto drop;
1031
1032
1033 if (!pskb_may_pull(skb, skb->len))
1034 goto drop;
1035
1036 b = (struct bootp_pkt *)skb_network_header(skb);
1037 h = &b->iph;
1038
1039
1040 spin_lock(&ic_recv_lock);
1041
1042
1043 if (ic_got_reply)
1044 goto drop_unlock;
1045
1046
1047 d = ic_first_dev;
1048 while (d && d->dev != dev)
1049 d = d->next;
1050 if (!d)
1051 goto drop_unlock;
1052
1053
1054 if (b->op != BOOTP_REPLY ||
1055 b->xid != d->xid) {
1056 net_err_ratelimited("DHCP/BOOTP: Reply not for us on %s, op[%x] xid[%x]\n",
1057 d->dev->name, b->op, b->xid);
1058 goto drop_unlock;
1059 }
1060
1061
1062 if (ext_len >= 4 &&
1063 !memcmp(b->exten, ic_bootp_cookie, 4)) {
1064 u8 *end = (u8 *) b + ntohs(b->iph.tot_len);
1065 u8 *ext;
1066
1067#ifdef IPCONFIG_DHCP
1068 if (ic_proto_enabled & IC_USE_DHCP) {
1069 __be32 server_id = NONE;
1070 int mt = 0;
1071
1072 ext = &b->exten[4];
1073 while (ext < end && *ext != 0xff) {
1074 u8 *opt = ext++;
1075 if (*opt == 0)
1076 continue;
1077 ext += *ext + 1;
1078 if (ext >= end)
1079 break;
1080 switch (*opt) {
1081 case 53:
1082 if (opt[1])
1083 mt = opt[2];
1084 break;
1085 case 54:
1086 if (opt[1] >= 4)
1087 memcpy(&server_id, opt + 2, 4);
1088 break;
1089 }
1090 }
1091
1092 pr_debug("DHCP: Got message type %d (%s)\n", mt, d->dev->name);
1093
1094 switch (mt) {
1095 case DHCPOFFER:
1096
1097
1098
1099 if (ic_myaddr != NONE)
1100 goto drop_unlock;
1101
1102
1103 ic_myaddr = b->your_ip;
1104 ic_servaddr = server_id;
1105 pr_debug("DHCP: Offered address %pI4 by server %pI4\n",
1106 &ic_myaddr, &b->iph.saddr);
1107
1108
1109
1110
1111 if ((server_id != NONE) &&
1112 (b->server_ip != server_id))
1113 b->server_ip = ic_servaddr;
1114 break;
1115
1116 case DHCPACK:
1117 if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0)
1118 goto drop_unlock;
1119
1120
1121 break;
1122
1123 default:
1124
1125 ic_myaddr = NONE;
1126 ic_servaddr = NONE;
1127 goto drop_unlock;
1128 }
1129
1130 ic_dhcp_msgtype = mt;
1131
1132 }
1133#endif
1134
1135 ext = &b->exten[4];
1136 while (ext < end && *ext != 0xff) {
1137 u8 *opt = ext++;
1138 if (*opt == 0)
1139 continue;
1140 ext += *ext + 1;
1141 if (ext < end)
1142 ic_do_bootp_ext(opt);
1143 }
1144 }
1145
1146
1147 ic_dev = d;
1148 ic_myaddr = b->your_ip;
1149 ic_servaddr = b->server_ip;
1150 ic_addrservaddr = b->iph.saddr;
1151 if (ic_gateway == NONE && b->relay_ip)
1152 ic_gateway = b->relay_ip;
1153 if (ic_nameservers[0] == NONE)
1154 ic_nameservers[0] = ic_servaddr;
1155 ic_got_reply = IC_BOOTP;
1156
1157drop_unlock:
1158
1159 spin_unlock(&ic_recv_lock);
1160
1161drop:
1162
1163 kfree_skb(skb);
1164
1165 return 0;
1166}
1167
1168
1169#endif
1170
1171
1172
1173
1174
1175
1176#ifdef IPCONFIG_DYNAMIC
1177
1178static int __init ic_dynamic(void)
1179{
1180 int retries;
1181 struct ic_device *d;
1182 unsigned long start_jiffies, timeout, jiff;
1183 int do_bootp = ic_proto_have_if & IC_BOOTP;
1184 int do_rarp = ic_proto_have_if & IC_RARP;
1185
1186
1187
1188
1189
1190
1191 if (!ic_proto_enabled) {
1192 pr_err("IP-Config: Incomplete network configuration information\n");
1193 return -1;
1194 }
1195
1196#ifdef IPCONFIG_BOOTP
1197 if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP)
1198 pr_err("DHCP/BOOTP: No suitable device found\n");
1199#endif
1200#ifdef IPCONFIG_RARP
1201 if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP)
1202 pr_err("RARP: No suitable device found\n");
1203#endif
1204
1205 if (!ic_proto_have_if)
1206
1207 return -1;
1208
1209
1210
1211
1212#ifdef IPCONFIG_BOOTP
1213 if (do_bootp)
1214 ic_bootp_init();
1215#endif
1216#ifdef IPCONFIG_RARP
1217 if (do_rarp)
1218 ic_rarp_init();
1219#endif
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229 pr_notice("Sending %s%s%s requests .",
1230 do_bootp
1231 ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "",
1232 (do_bootp && do_rarp) ? " and " : "",
1233 do_rarp ? "RARP" : "");
1234
1235 start_jiffies = jiffies;
1236 d = ic_first_dev;
1237 retries = CONF_SEND_RETRIES;
1238 get_random_bytes(&timeout, sizeof(timeout));
1239 timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM);
1240 for (;;) {
1241#ifdef IPCONFIG_BOOTP
1242 if (do_bootp && (d->able & IC_BOOTP))
1243 ic_bootp_send_if(d, jiffies - start_jiffies);
1244#endif
1245#ifdef IPCONFIG_RARP
1246 if (do_rarp && (d->able & IC_RARP))
1247 ic_rarp_send_if(d);
1248#endif
1249
1250 if (!d->next) {
1251 jiff = jiffies + timeout;
1252 while (time_before(jiffies, jiff) && !ic_got_reply)
1253 schedule_timeout_uninterruptible(1);
1254 }
1255#ifdef IPCONFIG_DHCP
1256
1257 if ((ic_got_reply & IC_BOOTP) &&
1258 (ic_proto_enabled & IC_USE_DHCP) &&
1259 ic_dhcp_msgtype != DHCPACK) {
1260 ic_got_reply = 0;
1261
1262 d = ic_dev;
1263 pr_cont(",");
1264 continue;
1265 }
1266#endif
1267
1268 if (ic_got_reply) {
1269 pr_cont(" OK\n");
1270 break;
1271 }
1272
1273 if ((d = d->next))
1274 continue;
1275
1276 if (! --retries) {
1277 pr_cont(" timed out!\n");
1278 break;
1279 }
1280
1281 d = ic_first_dev;
1282
1283 timeout = timeout CONF_TIMEOUT_MULT;
1284 if (timeout > CONF_TIMEOUT_MAX)
1285 timeout = CONF_TIMEOUT_MAX;
1286
1287 pr_cont(".");
1288 }
1289
1290#ifdef IPCONFIG_BOOTP
1291 if (do_bootp)
1292 ic_bootp_cleanup();
1293#endif
1294#ifdef IPCONFIG_RARP
1295 if (do_rarp)
1296 ic_rarp_cleanup();
1297#endif
1298
1299 if (!ic_got_reply) {
1300 ic_myaddr = NONE;
1301 return -1;
1302 }
1303
1304 pr_info("IP-Config: Got %s answer from %pI4, my address is %pI4\n",
1305 ((ic_got_reply & IC_RARP) ? "RARP"
1306 : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"),
1307 &ic_addrservaddr, &ic_myaddr);
1308
1309 return 0;
1310}
1311
1312#endif
1313
1314#ifdef CONFIG_PROC_FS
1315
1316static struct proc_dir_entry *ipconfig_dir;
1317
1318
1319static int pnp_seq_show(struct seq_file *seq, void *v)
1320{
1321 int i;
1322
1323 if (ic_proto_used & IC_PROTO)
1324 seq_printf(seq, "#PROTO: %s\n",
1325 (ic_proto_used & IC_RARP) ? "RARP"
1326 : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP");
1327 else
1328 seq_puts(seq, "#MANUAL\n");
1329
1330 if (ic_domain[0])
1331 seq_printf(seq,
1332 "domain %s\n", ic_domain);
1333 for (i = 0; i < CONF_NAMESERVERS_MAX; i++) {
1334 if (ic_nameservers[i] != NONE)
1335 seq_printf(seq, "nameserver %pI4\n",
1336 &ic_nameservers[i]);
1337 }
1338 if (ic_servaddr != NONE)
1339 seq_printf(seq, "bootserver %pI4\n",
1340 &ic_servaddr);
1341 return 0;
1342}
1343
1344
1345static int __init ipconfig_proc_net_init(void)
1346{
1347 ipconfig_dir = proc_net_mkdir(&init_net, "ipconfig", init_net.proc_net);
1348 if (!ipconfig_dir)
1349 return -ENOMEM;
1350
1351 return 0;
1352}
1353
1354
1355static int ipconfig_proc_net_create(const char *name,
1356 const struct proc_ops *proc_ops)
1357{
1358 char *pname;
1359 struct proc_dir_entry *p;
1360
1361 if (!ipconfig_dir)
1362 return -ENOMEM;
1363
1364 pname = kasprintf(GFP_KERNEL, "%s%s", "ipconfig/", name);
1365 if (!pname)
1366 return -ENOMEM;
1367
1368 p = proc_create(pname, 0444, init_net.proc_net, proc_ops);
1369 kfree(pname);
1370 if (!p)
1371 return -ENOMEM;
1372
1373 return 0;
1374}
1375
1376
1377static int ntp_servers_show(struct seq_file *seq, void *v)
1378{
1379 int i;
1380
1381 for (i = 0; i < CONF_NTP_SERVERS_MAX; i++) {
1382 if (ic_ntp_servers[i] != NONE)
1383 seq_printf(seq, "%pI4\n", &ic_ntp_servers[i]);
1384 }
1385 return 0;
1386}
1387DEFINE_PROC_SHOW_ATTRIBUTE(ntp_servers);
1388#endif
1389
1390
1391
1392
1393
1394
1395__be32 __init root_nfs_parse_addr(char *name)
1396{
1397 __be32 addr;
1398 int octets = 0;
1399 char *cp, *cq;
1400
1401 cp = cq = name;
1402 while (octets < 4) {
1403 while (*cp >= '0' && *cp <= '9')
1404 cp++;
1405 if (cp == cq || cp - cq > 3)
1406 break;
1407 if (*cp == '.' || octets == 3)
1408 octets++;
1409 if (octets < 4)
1410 cp++;
1411 cq = cp;
1412 }
1413 if (octets == 4 && (*cp == ':' || *cp == '\0')) {
1414 if (*cp == ':')
1415 *cp++ = '\0';
1416 addr = in_aton(name);
1417 memmove(name, cp, strlen(cp) + 1);
1418 } else
1419 addr = NONE;
1420
1421 return addr;
1422}
1423
1424#define DEVICE_WAIT_MAX 12
1425
1426static int __init wait_for_devices(void)
1427{
1428 int i;
1429
1430 for (i = 0; i < DEVICE_WAIT_MAX; i++) {
1431 struct net_device *dev;
1432 int found = 0;
1433
1434
1435 wait_for_device_probe();
1436
1437 rtnl_lock();
1438 for_each_netdev(&init_net, dev) {
1439 if (ic_is_init_dev(dev)) {
1440 found = 1;
1441 break;
1442 }
1443 }
1444 rtnl_unlock();
1445 if (found)
1446 return 0;
1447 ssleep(1);
1448 }
1449 return -ENODEV;
1450}
1451
1452
1453
1454
1455
1456static int __init ip_auto_config(void)
1457{
1458 __be32 addr;
1459#ifdef IPCONFIG_DYNAMIC
1460 int retries = CONF_OPEN_RETRIES;
1461#endif
1462 int err;
1463 unsigned int i, count;
1464
1465
1466
1467
1468
1469 if (ic_set_manually == 0) {
1470 ic_nameservers_predef();
1471 ic_ntp_servers_predef();
1472 }
1473
1474#ifdef CONFIG_PROC_FS
1475 proc_create_single("pnp", 0444, init_net.proc_net, pnp_seq_show);
1476
1477 if (ipconfig_proc_net_init() == 0)
1478 ipconfig_proc_net_create("ntp_servers", &ntp_servers_proc_ops);
1479#endif
1480
1481 if (!ic_enable)
1482 return 0;
1483
1484 pr_debug("IP-Config: Entered.\n");
1485#ifdef IPCONFIG_DYNAMIC
1486 try_try_again:
1487#endif
1488
1489 err = wait_for_devices();
1490 if (err)
1491 return err;
1492
1493
1494 err = ic_open_devs();
1495 if (err)
1496 return err;
1497
1498
1499 msleep(CONF_POST_OPEN);
1500
1501
1502
1503
1504
1505
1506
1507 if (ic_myaddr == NONE ||
1508#if defined(CONFIG_ROOT_NFS) || defined(CONFIG_CIFS_ROOT)
1509 (root_server_addr == NONE &&
1510 ic_servaddr == NONE &&
1511 (ROOT_DEV == Root_NFS || ROOT_DEV == Root_CIFS)) ||
1512#endif
1513 ic_first_dev->next) {
1514#ifdef IPCONFIG_DYNAMIC
1515 if (ic_dynamic() < 0) {
1516 ic_close_devs();
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532#ifdef CONFIG_ROOT_NFS
1533 if (ROOT_DEV == Root_NFS) {
1534 pr_err("IP-Config: Retrying forever (NFS root)...\n");
1535 goto try_try_again;
1536 }
1537#endif
1538#ifdef CONFIG_CIFS_ROOT
1539 if (ROOT_DEV == Root_CIFS) {
1540 pr_err("IP-Config: Retrying forever (CIFS root)...\n");
1541 goto try_try_again;
1542 }
1543#endif
1544
1545 if (--retries) {
1546 pr_err("IP-Config: Reopening network devices...\n");
1547 goto try_try_again;
1548 }
1549
1550
1551 pr_err("IP-Config: Auto-configuration of network failed\n");
1552 return -1;
1553 }
1554#else
1555 pr_err("IP-Config: Incomplete network configuration information\n");
1556 ic_close_devs();
1557 return -1;
1558#endif
1559 } else {
1560
1561 ic_dev = ic_first_dev;
1562 }
1563
1564 addr = root_nfs_parse_addr(root_server_path);
1565 if (root_server_addr == NONE)
1566 root_server_addr = addr;
1567
1568
1569
1570
1571 if (ic_defaults() < 0)
1572 return -1;
1573
1574
1575
1576
1577#ifdef IPCONFIG_DYNAMIC
1578 ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP);
1579#endif
1580
1581#ifndef IPCONFIG_SILENT
1582
1583
1584
1585 pr_info("IP-Config: Complete:\n");
1586
1587 pr_info(" device=%s, hwaddr=%*phC, ipaddr=%pI4, mask=%pI4, gw=%pI4\n",
1588 ic_dev->dev->name, ic_dev->dev->addr_len, ic_dev->dev->dev_addr,
1589 &ic_myaddr, &ic_netmask, &ic_gateway);
1590 pr_info(" host=%s, domain=%s, nis-domain=%s\n",
1591 utsname()->nodename, ic_domain, utsname()->domainname);
1592 pr_info(" bootserver=%pI4, rootserver=%pI4, rootpath=%s",
1593 &ic_servaddr, &root_server_addr, root_server_path);
1594 if (ic_dev_mtu)
1595 pr_cont(", mtu=%d", ic_dev_mtu);
1596
1597 for (i = 0, count = 0; i < CONF_NAMESERVERS_MAX; i++) {
1598 if (ic_nameservers[i] != NONE) {
1599 if (i == 0)
1600 pr_info(" nameserver%u=%pI4",
1601 i, &ic_nameservers[i]);
1602 else
1603 pr_cont(", nameserver%u=%pI4",
1604 i, &ic_nameservers[i]);
1605
1606 count++;
1607 }
1608 if ((i + 1 == CONF_NAMESERVERS_MAX) && count > 0)
1609 pr_cont("\n");
1610 }
1611
1612 for (i = 0, count = 0; i < CONF_NTP_SERVERS_MAX; i++) {
1613 if (ic_ntp_servers[i] != NONE) {
1614 if (i == 0)
1615 pr_info(" ntpserver%u=%pI4",
1616 i, &ic_ntp_servers[i]);
1617 else
1618 pr_cont(", ntpserver%u=%pI4",
1619 i, &ic_ntp_servers[i]);
1620
1621 count++;
1622 }
1623 if ((i + 1 == CONF_NTP_SERVERS_MAX) && count > 0)
1624 pr_cont("\n");
1625 }
1626#endif
1627
1628
1629
1630
1631
1632 if (ic_setup_if() < 0 || ic_setup_routes() < 0)
1633 err = -1;
1634 else
1635 err = 0;
1636
1637 ic_close_devs();
1638
1639 return err;
1640}
1641
1642late_initcall(ip_auto_config);
1643
1644
1645
1646
1647
1648
1649static int __init ic_proto_name(char *name)
1650{
1651 if (!strcmp(name, "on") || !strcmp(name, "any")) {
1652 return 1;
1653 }
1654 if (!strcmp(name, "off") || !strcmp(name, "none")) {
1655 return 0;
1656 }
1657#ifdef CONFIG_IP_PNP_DHCP
1658 else if (!strncmp(name, "dhcp", 4)) {
1659 char *client_id;
1660
1661 ic_proto_enabled &= ~IC_RARP;
1662 client_id = strstr(name, "dhcp,");
1663 if (client_id) {
1664 char *v;
1665
1666 client_id = client_id + 5;
1667 v = strchr(client_id, ',');
1668 if (!v)
1669 return 1;
1670 *v = 0;
1671 if (kstrtou8(client_id, 0, dhcp_client_identifier))
1672 pr_debug("DHCP: Invalid client identifier type\n");
1673 strncpy(dhcp_client_identifier + 1, v + 1, 251);
1674 *v = ',';
1675 }
1676 return 1;
1677 }
1678#endif
1679#ifdef CONFIG_IP_PNP_BOOTP
1680 else if (!strcmp(name, "bootp")) {
1681 ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP);
1682 return 1;
1683 }
1684#endif
1685#ifdef CONFIG_IP_PNP_RARP
1686 else if (!strcmp(name, "rarp")) {
1687 ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP);
1688 return 1;
1689 }
1690#endif
1691#ifdef IPCONFIG_DYNAMIC
1692 else if (!strcmp(name, "both")) {
1693 ic_proto_enabled &= ~IC_USE_DHCP;
1694 return 1;
1695 }
1696#endif
1697 return 0;
1698}
1699
1700static int __init ip_auto_config_setup(char *addrs)
1701{
1702 char *cp, *ip, *dp;
1703 int num = 0;
1704
1705 ic_set_manually = 1;
1706 ic_enable = 1;
1707
1708
1709
1710
1711
1712 if (ic_proto_name(addrs))
1713 return 1;
1714
1715
1716 if (*addrs == 0 ||
1717 strcmp(addrs, "off") == 0 ||
1718 strcmp(addrs, "none") == 0) {
1719 ic_enable = 0;
1720 return 1;
1721 }
1722
1723
1724 ic_nameservers_predef();
1725 ic_ntp_servers_predef();
1726
1727
1728 ip = addrs;
1729 while (ip && *ip) {
1730 if ((cp = strchr(ip, ':')))
1731 *cp++ = '\0';
1732 if (strlen(ip) > 0) {
1733 pr_debug("IP-Config: Parameter #%d: `%s'\n", num, ip);
1734 switch (num) {
1735 case 0:
1736 if ((ic_myaddr = in_aton(ip)) == ANY)
1737 ic_myaddr = NONE;
1738 break;
1739 case 1:
1740 if ((ic_servaddr = in_aton(ip)) == ANY)
1741 ic_servaddr = NONE;
1742 break;
1743 case 2:
1744 if ((ic_gateway = in_aton(ip)) == ANY)
1745 ic_gateway = NONE;
1746 break;
1747 case 3:
1748 if ((ic_netmask = in_aton(ip)) == ANY)
1749 ic_netmask = NONE;
1750 break;
1751 case 4:
1752 if ((dp = strchr(ip, '.'))) {
1753 *dp++ = '\0';
1754 strlcpy(utsname()->domainname, dp,
1755 sizeof(utsname()->domainname));
1756 }
1757 strlcpy(utsname()->nodename, ip,
1758 sizeof(utsname()->nodename));
1759 ic_host_name_set = 1;
1760 break;
1761 case 5:
1762 strlcpy(user_dev_name, ip, sizeof(user_dev_name));
1763 break;
1764 case 6:
1765 if (ic_proto_name(ip) == 0 &&
1766 ic_myaddr == NONE) {
1767 ic_enable = 0;
1768 }
1769 break;
1770 case 7:
1771 if (CONF_NAMESERVERS_MAX >= 1) {
1772 ic_nameservers[0] = in_aton(ip);
1773 if (ic_nameservers[0] == ANY)
1774 ic_nameservers[0] = NONE;
1775 }
1776 break;
1777 case 8:
1778 if (CONF_NAMESERVERS_MAX >= 2) {
1779 ic_nameservers[1] = in_aton(ip);
1780 if (ic_nameservers[1] == ANY)
1781 ic_nameservers[1] = NONE;
1782 }
1783 break;
1784 case 9:
1785 if (CONF_NTP_SERVERS_MAX >= 1) {
1786 ic_ntp_servers[0] = in_aton(ip);
1787 if (ic_ntp_servers[0] == ANY)
1788 ic_ntp_servers[0] = NONE;
1789 }
1790 break;
1791 }
1792 }
1793 ip = cp;
1794 num++;
1795 }
1796
1797 return 1;
1798}
1799__setup("ip=", ip_auto_config_setup);
1800
1801static int __init nfsaddrs_config_setup(char *addrs)
1802{
1803 return ip_auto_config_setup(addrs);
1804}
1805__setup("nfsaddrs=", nfsaddrs_config_setup);
1806
1807static int __init vendor_class_identifier_setup(char *addrs)
1808{
1809 if (strlcpy(vendor_class_identifier, addrs,
1810 sizeof(vendor_class_identifier))
1811 >= sizeof(vendor_class_identifier))
1812 pr_warn("DHCP: vendorclass too long, truncated to \"%s\"\n",
1813 vendor_class_identifier);
1814 return 1;
1815}
1816__setup("dhcpclass=", vendor_class_identifier_setup);
1817
1818static int __init set_carrier_timeout(char *str)
1819{
1820 ssize_t ret;
1821
1822 if (!str)
1823 return 0;
1824
1825 ret = kstrtouint(str, 0, &carrier_timeout);
1826 if (ret)
1827 return 0;
1828
1829 return 1;
1830}
1831__setup("carrier_timeout=", set_carrier_timeout);
1832