Rename printf -> kprintf in sys/ and add some defines where necessary
[dragonfly.git] / sys / vfs / nfs / bootp_subr.c
CommitLineData
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1/*
2 * Copyright (c) 1995 Gordon Ross, Adam Glass
3 * Copyright (c) 1992 Regents of the University of California.
4 * All rights reserved.
5 *
6 * This software was developed by the Computer Systems Engineering group
7 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
8 * contributed to Berkeley.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Lawrence Berkeley Laboratory and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
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38 * nfs/krpc_subr.c
39 * $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
40 * $FreeBSD: src/sys/nfs/bootp_subr.c,v 1.20.2.9 2003/04/24 16:51:08 ambrisko Exp $
086c1d7e 41 * $DragonFly: src/sys/vfs/nfs/bootp_subr.c,v 1.22 2006/12/23 00:41:29 swildner Exp $
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42 */
43
44#include "opt_bootp.h"
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/kernel.h>
49#include <sys/sockio.h>
50#include <sys/proc.h>
51#include <sys/malloc.h>
52#include <sys/mount.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/socketvar.h>
56#include <sys/sysctl.h>
57#include <sys/uio.h>
469cf181 58#include <sys/fcntl.h>
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59
60#include <net/if.h>
61#include <net/route.h>
62
63#include <netinet/in.h>
64#include <net/if_types.h>
65#include <net/if_dl.h>
66
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67#include "rpcv2.h"
68#include "nfsproto.h"
69#include "nfs.h"
70#include "nfsdiskless.h"
71#include "krpc.h"
72#include "xdr_subs.h"
0e8ff41a 73#include "nfsmountrpc.h"
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74
75#define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
76
77#ifndef BOOTP_SETTLE_DELAY
78#define BOOTP_SETTLE_DELAY 3
79#endif
80
81/*
82 * What is the longest we will wait before re-sending a request?
83 * Note this is also the frequency of "RPC timeout" messages.
84 * The re-send loop count sup linearly to this maximum, so the
85 * first complaint will happen after (1+2+3+4+5)=15 seconds.
86 */
87#define MAX_RESEND_DELAY 5 /* seconds */
88
89/* Definitions from RFC951 */
90struct bootp_packet {
91 u_int8_t op;
92 u_int8_t htype;
93 u_int8_t hlen;
94 u_int8_t hops;
95 u_int32_t xid;
96 u_int16_t secs;
97 u_int16_t flags;
98 struct in_addr ciaddr;
99 struct in_addr yiaddr;
100 struct in_addr siaddr;
101 struct in_addr giaddr;
102 unsigned char chaddr[16];
103 char sname[64];
104 char file[128];
105 unsigned char vend[1222];
106};
107
108struct bootpc_ifcontext {
109 struct bootpc_ifcontext *next;
110 struct bootp_packet call;
111 struct bootp_packet reply;
112 int replylen;
113 int overload;
114 struct socket *so;
115 struct ifreq ireq;
116 struct ifnet *ifp;
117 struct sockaddr_dl *sdl;
118 struct sockaddr_in myaddr;
119 struct sockaddr_in netmask;
120 struct sockaddr_in gw;
121 struct sockaddr_in broadcast; /* Different for each interface */
122 int gotgw;
123 int gotnetmask;
124 int gotrootpath;
125 int outstanding;
126 int sentmsg;
127 u_int32_t xid;
128 enum {
129 IF_BOOTP_UNRESOLVED,
130 IF_BOOTP_RESOLVED,
131 IF_BOOTP_FAILED,
132 IF_DHCP_UNRESOLVED,
133 IF_DHCP_OFFERED,
134 IF_DHCP_RESOLVED,
135 IF_DHCP_FAILED,
136 } state;
137 int dhcpquerytype; /* dhcp type sent */
138 struct in_addr dhcpserver;
139 int gotdhcpserver;
140};
141
142#define TAG_MAXLEN 1024
143struct bootpc_tagcontext {
144 char buf[TAG_MAXLEN + 1];
145 int overload;
146 int badopt;
147 int badtag;
148 int foundopt;
149 int taglen;
150};
151
152struct bootpc_globalcontext {
153 struct bootpc_ifcontext *interfaces;
154 struct bootpc_ifcontext *lastinterface;
155 u_int32_t xid;
156 int gotrootpath;
157 int gotswappath;
158 int gotgw;
159 int ifnum;
160 int secs;
161 int starttime;
162 struct bootp_packet reply;
163 int replylen;
164 struct bootpc_ifcontext *setswapfs;
165 struct bootpc_ifcontext *setrootfs;
166 struct bootpc_ifcontext *sethostname;
167 char lookup_path[24];
168 struct bootpc_tagcontext tmptag;
169 struct bootpc_tagcontext tag;
170};
171
172#define IPPORT_BOOTPC 68
173#define IPPORT_BOOTPS 67
174
175#define BOOTP_REQUEST 1
176#define BOOTP_REPLY 2
177
178/* Common tags */
179#define TAG_PAD 0 /* Pad option, implicit length 1 */
180#define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */
181#define TAG_ROUTERS 3 /* Routers (in order of preference) */
182#define TAG_HOSTNAME 12 /* Client host name */
183#define TAG_ROOT 17 /* Root path */
184
185/* DHCP specific tags */
186#define TAG_OVERLOAD 52 /* Option Overload */
187#define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */
188
189#define TAG_END 255 /* End Option (i.e. no more options) */
190
191/* Overload values */
192#define OVERLOAD_FILE 1
193#define OVERLOAD_SNAME 2
194
195/* Site specific tags: */
196#define TAG_SWAP 128
197#define TAG_SWAPSIZE 129
198#define TAG_ROOTOPTS 130
199#define TAG_SWAPOPTS 131
200#define TAG_COOKIE 134 /* ascii info for userland, exported via sysctl */
201
202#define TAG_DHCP_MSGTYPE 53
203#define TAG_DHCP_REQ_ADDR 50
204#define TAG_DHCP_SERVERID 54
205#define TAG_DHCP_LEASETIME 51
206
207#define TAG_VENDOR_INDENTIFIER 60
208
209#define DHCP_NOMSG 0
210#define DHCP_DISCOVER 1
211#define DHCP_OFFER 2
212#define DHCP_REQUEST 3
213#define DHCP_ACK 5
214
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215extern struct nfsv3_diskless nfsv3_diskless;
216static char bootp_cookie[128];
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217SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
218 bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
219
220/* mountd RPC */
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221static void print_in_addr(struct in_addr addr);
222static void print_sin_addr(struct sockaddr_in *addr);
223static void clear_sinaddr(struct sockaddr_in *sin);
224static
225struct bootpc_ifcontext *allocifctx(struct bootpc_globalcontext *gctx);
226static void bootpc_compose_query(struct bootpc_ifcontext *ifctx,
227 struct bootpc_globalcontext *gctx,
7b95be2a 228 struct thread *td);
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229static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
230 struct bootp_packet *bp, int len, int tag);
231static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
232 unsigned char *start, int len, int tag);
233
234#ifdef BOOTP_DEBUG
235void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma);
236void bootpboot_p_ma(struct sockaddr *ma);
237void bootpboot_p_rtentry(struct rtentry *rt);
238void bootpboot_p_tree(struct radix_node *rn);
239void bootpboot_p_rtlist(void);
240void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
241void bootpboot_p_iflist(void);
242#endif
243
244static int bootpc_call(struct bootpc_globalcontext *gctx,
7b95be2a 245 struct thread *td);
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246
247static int bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
248 struct bootpc_globalcontext *gctx,
7b95be2a 249 struct thread *td);
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250
251static int bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
252 struct bootpc_globalcontext *gctx,
7b95be2a 253 struct thread *td);
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254
255static void bootpc_decode_reply(struct nfsv3_diskless *nd,
256 struct bootpc_ifcontext *ifctx,
257 struct bootpc_globalcontext *gctx);
258
259static int bootpc_received(struct bootpc_globalcontext *gctx,
260 struct bootpc_ifcontext *ifctx);
261
262static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
263static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
264static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
265
266void bootpc_init(void);
267
268/*
269 * In order to have multiple active interfaces with address 0.0.0.0
270 * and be able to send data to a selected interface, we perform
271 * some tricks:
272 *
273 * - The 'broadcast' address is different for each interface.
274 *
275 * - We temporarily add routing pointing 255.255.255.255 to the
276 * selected interface broadcast address, thus the packet sent
277 * goes to that interface.
278 */
279
280#ifdef BOOTP_DEBUG
281void
e851b29e 282bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma)
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283{
284 if (sa == NULL) {
086c1d7e 285 kprintf("(sockaddr *) <null>");
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286 return;
287 }
288 switch (sa->sa_family) {
289 case AF_INET:
290 {
291 struct sockaddr_in *sin;
292
293 sin = (struct sockaddr_in *) sa;
086c1d7e 294 kprintf("inet ");
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295 print_sin_addr(sin);
296 if (ma != NULL) {
297 sin = (struct sockaddr_in *) ma;
086c1d7e 298 kprintf(" mask ");
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299 print_sin_addr(sin);
300 }
301 }
302 break;
303 case AF_LINK:
304 {
305 struct sockaddr_dl *sli;
306 int i;
307
308 sli = (struct sockaddr_dl *) sa;
086c1d7e 309 kprintf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
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310 for (i = 0; i < sli->sdl_alen; i++) {
311 if (i > 0)
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312 kprintf(":");
313 kprintf("%x", ((unsigned char *) LLADDR(sli))[i]);
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314 }
315 }
316 break;
317 default:
086c1d7e 318 kprintf("af%d", sa->sa_family);
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319 }
320}
321
322
323void
324bootpboot_p_ma(struct sockaddr *ma)
325{
326 if (ma == NULL) {
086c1d7e 327 kprintf("<null>");
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328 return;
329 }
086c1d7e 330 kprintf("%x", *(int *)ma);
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331}
332
333
334void
335bootpboot_p_rtentry(struct rtentry *rt)
336{
337 bootpboot_p_sa(rt_key(rt), rt_mask(rt));
086c1d7e 338 kprintf(" ");
984263bc 339 bootpboot_p_ma(rt->rt_genmask);
086c1d7e 340 kprintf(" ");
984263bc 341 bootpboot_p_sa(rt->rt_gateway, NULL);
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342 kprintf(" ");
343 kprintf("flags %x", (unsigned short) rt->rt_flags);
344 kprintf(" %d", (int) rt->rt_rmx.rmx_expire);
345 kprintf(" %s\n", if_name(rt->rt_ifp));
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346}
347
348
349void
350bootpboot_p_tree(struct radix_node *rn)
351{
352 while (rn != NULL) {
353 if (rn->rn_bit < 0) {
354 if ((rn->rn_flags & RNF_ROOT) != 0) {
355 } else {
356 bootpboot_p_rtentry((struct rtentry *) rn);
357 }
358 rn = rn->rn_dupedkey;
359 } else {
360 bootpboot_p_tree(rn->rn_left);
361 bootpboot_p_tree(rn->rn_right);
362 return;
363 }
364 }
365}
366
367
368void
369bootpboot_p_rtlist(void)
370{
086c1d7e 371 kprintf("Routing table:\n");
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372 bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
373}
374
375
376void
377bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
378{
086c1d7e 379 kprintf("%s flags %x, addr ",
4beb866e 380 if_name(ifp),
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381 (unsigned short) ifp->if_flags);
382 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
086c1d7e 383 kprintf(", broadcast ");
984263bc 384 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
086c1d7e 385 kprintf(", netmask ");
984263bc 386 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
086c1d7e 387 kprintf("\n");
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388}
389
390
391void
392bootpboot_p_iflist(void)
393{
394 struct ifnet *ifp;
395 struct ifaddr *ifa;
396
086c1d7e 397 kprintf("Interface list:\n");
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398 TAILQ_FOREACH(ifp, &ifnet, if_link) {
399 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
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400 if (ifa->ifa_addr->sa_family == AF_INET)
401 bootpboot_p_if(ifp, ifa);
402 }
403}
404#endif /* defined(BOOTP_DEBUG) */
405
406
407static void
408clear_sinaddr(struct sockaddr_in *sin)
409{
410 bzero(sin, sizeof(*sin));
411 sin->sin_len = sizeof(*sin);
412 sin->sin_family = AF_INET;
413 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
414 sin->sin_port = 0;
415}
416
417
418static struct bootpc_ifcontext *
419allocifctx(struct bootpc_globalcontext *gctx)
420{
421 struct bootpc_ifcontext *ifctx;
77652cad 422 ifctx = (struct bootpc_ifcontext *) kmalloc(sizeof(*ifctx),
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423 M_TEMP, M_WAITOK);
424 if (ifctx == NULL)
425 panic("Failed to allocate bootp interface context structure");
426
427 bzero(ifctx, sizeof(*ifctx));
428 ifctx->xid = gctx->xid;
429#ifdef BOOTP_NO_DHCP
430 ifctx->state = IF_BOOTP_UNRESOLVED;
431#else
432 ifctx->state = IF_DHCP_UNRESOLVED;
433#endif
434 gctx->xid += 0x100;
435 return ifctx;
436}
437
438
439static __inline int
440bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
441{
442 if (ifctx->state == IF_BOOTP_RESOLVED ||
443 ifctx->state == IF_DHCP_RESOLVED)
444 return 1;
445 return 0;
446}
447
448
449static __inline int
450bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
451{
452 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
453 ifctx->state == IF_DHCP_UNRESOLVED)
454 return 1;
455 return 0;
456}
457
458
459static __inline int
460bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
461{
462 if (ifctx->state == IF_BOOTP_FAILED ||
463 ifctx->state == IF_DHCP_FAILED)
464 return 1;
465 return 0;
466}
467
468
469static int
470bootpc_received(struct bootpc_globalcontext *gctx,
471 struct bootpc_ifcontext *ifctx)
472{
473 unsigned char dhcpreplytype;
474 char *p;
475 /*
476 * Need timeout for fallback to less
477 * desirable alternative.
478 */
479
480
481 /* This call used for the side effect (badopt flag) */
482 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
483 gctx->replylen,
484 TAG_END);
485
486 /* If packet is invalid, ignore it */
487 if (gctx->tmptag.badopt != 0)
488 return 0;
489
490 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
491 gctx->replylen, TAG_DHCP_MSGTYPE);
492 if (p != NULL)
493 dhcpreplytype = *p;
494 else
495 dhcpreplytype = DHCP_NOMSG;
496
497 switch (ifctx->dhcpquerytype) {
498 case DHCP_DISCOVER:
499 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
500#ifndef BOOTP_FORCE_DHCP
501 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
502#endif
503 )
504 return 0;
505 break;
506 case DHCP_REQUEST:
507 if (dhcpreplytype != DHCP_ACK)
508 return 0;
de1bbfa4 509 /* fall through */
984263bc 510 case DHCP_NOMSG:
de1bbfa4 511 break;
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512 }
513
514
515 /* Ignore packet unless it gives us a root tag we didn't have */
516
517 if ((ifctx->state == IF_BOOTP_RESOLVED ||
518 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
519 (ifctx->state == IF_DHCP_OFFERED ||
520 ifctx->state == IF_DHCP_RESOLVED))) &&
521 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
522 ifctx->replylen,
523 TAG_ROOT) != NULL ||
524 bootpc_tag(&gctx->tmptag, &gctx->reply,
525 gctx->replylen,
526 TAG_ROOT) == NULL))
527 return 0;
528
529 bcopy(&gctx->reply,
530 &ifctx->reply,
531 gctx->replylen);
532 ifctx->replylen = gctx->replylen;
533
534 /* XXX: Only reset if 'perfect' response */
535 if (ifctx->state == IF_BOOTP_UNRESOLVED)
536 ifctx->state = IF_BOOTP_RESOLVED;
537 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
538 ifctx->dhcpquerytype == DHCP_DISCOVER) {
539 if (dhcpreplytype == DHCP_OFFER)
540 ifctx->state = IF_DHCP_OFFERED;
541 else
542 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
543 } else if (ifctx->state == IF_DHCP_OFFERED &&
544 ifctx->dhcpquerytype == DHCP_REQUEST)
545 ifctx->state = IF_DHCP_RESOLVED;
546
547
548 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
549 ifctx->state != IF_BOOTP_RESOLVED) {
550 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
551 ifctx->replylen, TAG_DHCP_SERVERID);
552 if (p != NULL && gctx->tmptag.taglen == 4) {
553 memcpy(&ifctx->dhcpserver, p, 4);
554 ifctx->gotdhcpserver = 1;
555 } else
556 ifctx->gotdhcpserver = 0;
557 return 1;
558 }
559
560 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
561 ifctx->replylen,
562 TAG_ROOT) != NULL);
563 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
564 ifctx->replylen,
565 TAG_ROUTERS) != NULL);
566 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
567 ifctx->replylen,
568 TAG_SUBNETMASK) != NULL);
569 return 1;
570}
571
572static int
e851b29e 573bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
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574{
575 struct socket *so;
576 struct sockaddr_in *sin, dst;
577 struct uio auio;
578 struct sockopt sopt;
579 struct iovec aio;
580 int error, on, rcvflg, timo, len;
581 time_t atimo;
582 time_t rtimo;
583 struct timeval tv;
584 struct bootpc_ifcontext *ifctx;
585 int outstanding;
586 int gotrootpath;
587 int retry;
588 const char *s;
589
590 /*
591 * Create socket and set its recieve timeout.
592 */
7b95be2a 593 error = socreate(AF_INET, &so, SOCK_DGRAM, 0, td);
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594 if (error != 0)
595 goto out;
596
597 tv.tv_sec = 1;
598 tv.tv_usec = 0;
599 bzero(&sopt, sizeof(sopt));
600 sopt.sopt_level = SOL_SOCKET;
601 sopt.sopt_name = SO_RCVTIMEO;
602 sopt.sopt_val = &tv;
603 sopt.sopt_valsize = sizeof tv;
604
605 error = sosetopt(so, &sopt);
606 if (error != 0)
607 goto out;
608
609 /*
610 * Enable broadcast.
611 */
612 on = 1;
613 sopt.sopt_name = SO_BROADCAST;
614 sopt.sopt_val = &on;
615 sopt.sopt_valsize = sizeof on;
616
617 error = sosetopt(so, &sopt);
618 if (error != 0)
619 goto out;
620
621 /*
622 * Disable routing.
623 */
624
625 on = 1;
626 sopt.sopt_name = SO_DONTROUTE;
627 sopt.sopt_val = &on;
628 sopt.sopt_valsize = sizeof on;
629
630 error = sosetopt(so, &sopt);
631 if (error != 0)
632 goto out;
633
634 /*
635 * Bind the local endpoint to a bootp client port.
636 */
637 sin = &dst;
638 clear_sinaddr(sin);
639 sin->sin_port = htons(IPPORT_BOOTPC);
7b95be2a 640 error = sobind(so, (struct sockaddr *)sin, td);
984263bc 641 if (error != 0) {
086c1d7e 642 kprintf("bind failed\n");
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643 goto out;
644 }
645
646 /*
647 * Setup socket address for the server.
648 */
649 sin = &dst;
650 clear_sinaddr(sin);
651 sin->sin_addr.s_addr = INADDR_BROADCAST;
652 sin->sin_port = htons(IPPORT_BOOTPS);
653
654 /*
655 * Send it, repeatedly, until a reply is received,
656 * but delay each re-send by an increasing amount.
657 * If the delay hits the maximum, start complaining.
658 */
659 timo = 0;
660 rtimo = 0;
661 for (;;) {
662
663 outstanding = 0;
664 gotrootpath = 0;
665
666 for (ifctx = gctx->interfaces;
667 ifctx != NULL;
668 ifctx = ifctx->next) {
669 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
670 bootpc_tag(&gctx->tmptag, &ifctx->reply,
671 ifctx->replylen,
672 TAG_ROOT) != NULL)
673 gotrootpath = 1;
674 }
675
676 for (ifctx = gctx->interfaces;
677 ifctx != NULL;
678 ifctx = ifctx->next) {
679 ifctx->outstanding = 0;
680 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
681 gotrootpath != 0) {
682 continue;
683 }
684 if (bootpc_ifctx_isfailed(ifctx) != 0)
685 continue;
686
687 outstanding++;
688 ifctx->outstanding = 1;
689
690 /* Proceed to next step in DHCP negotiation */
691 if ((ifctx->state == IF_DHCP_OFFERED &&
692 ifctx->dhcpquerytype != DHCP_REQUEST) ||
693 (ifctx->state == IF_DHCP_UNRESOLVED &&
694 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
695 (ifctx->state == IF_BOOTP_UNRESOLVED &&
696 ifctx->dhcpquerytype != DHCP_NOMSG)) {
697 ifctx->sentmsg = 0;
7b95be2a 698 bootpc_compose_query(ifctx, gctx, td);
984263bc
MD
699 }
700
701 /* Send BOOTP request (or re-send). */
702
703 if (ifctx->sentmsg == 0) {
704 switch(ifctx->dhcpquerytype) {
705 case DHCP_DISCOVER:
706 s = "DHCP Discover";
707 break;
708 case DHCP_REQUEST:
709 s = "DHCP Request";
710 break;
711 case DHCP_NOMSG:
712 default:
713 s = "BOOTP Query";
714 break;
715 }
086c1d7e 716 kprintf("Sending %s packet from "
984263bc
MD
717 "interface %s (%*D)\n",
718 s,
719 ifctx->ireq.ifr_name,
720 ifctx->sdl->sdl_alen,
721 (unsigned char *) LLADDR(ifctx->sdl),
722 ":");
723 ifctx->sentmsg = 1;
724 }
725
726 aio.iov_base = (caddr_t) &ifctx->call;
727 aio.iov_len = sizeof(ifctx->call);
728
729 auio.uio_iov = &aio;
730 auio.uio_iovcnt = 1;
731 auio.uio_segflg = UIO_SYSSPACE;
732 auio.uio_rw = UIO_WRITE;
733 auio.uio_offset = 0;
734 auio.uio_resid = sizeof(ifctx->call);
7b95be2a 735 auio.uio_td = td;
984263bc
MD
736
737 /* Set netmask to 0.0.0.0 */
738
739 sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
740 clear_sinaddr(sin);
741 error = ifioctl(ifctx->so, SIOCSIFNETMASK,
71ed21e4 742 (caddr_t) &ifctx->ireq, proc0.p_ucred);
984263bc
MD
743 if (error != 0)
744 panic("bootpc_call:"
745 "set if netmask, error=%d",
746 error);
747
748 error = sosend(so, (struct sockaddr *) &dst,
7b95be2a 749 &auio, NULL, NULL, 0, td);
984263bc 750 if (error != 0) {
086c1d7e 751 kprintf("bootpc_call: sosend: %d state %08x\n",
984263bc
MD
752 error, (int) so->so_state);
753 }
754
755 /* XXX: Is this needed ? */
377d4740 756 tsleep(&error, 0, "bootpw", 10);
984263bc
MD
757
758 /* Set netmask to 255.0.0.0 */
759
760 sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
761 clear_sinaddr(sin);
762 sin->sin_addr.s_addr = htonl(0xff000000u);
763 error = ifioctl(ifctx->so, SIOCSIFNETMASK,
71ed21e4 764 (caddr_t) &ifctx->ireq, proc0.p_ucred);
984263bc
MD
765 if (error != 0)
766 panic("bootpc_call:"
767 "set if netmask, error=%d",
768 error);
769
770 }
771
772 if (outstanding == 0 &&
773 (rtimo == 0 || time_second >= rtimo)) {
774 error = 0;
775 goto gotreply;
776 }
777
778 /* Determine new timeout. */
779 if (timo < MAX_RESEND_DELAY)
780 timo++;
781 else {
086c1d7e 782 kprintf("DHCP/BOOTP timeout for server ");
984263bc 783 print_sin_addr(&dst);
086c1d7e 784 kprintf("\n");
984263bc
MD
785 }
786
787 /*
788 * Wait for up to timo seconds for a reply.
789 * The socket receive timeout was set to 1 second.
790 */
791 atimo = timo + time_second;
792 while (time_second < atimo) {
793 aio.iov_base = (caddr_t) &gctx->reply;
794 aio.iov_len = sizeof(gctx->reply);
795
796 auio.uio_iov = &aio;
797 auio.uio_iovcnt = 1;
798 auio.uio_segflg = UIO_SYSSPACE;
799 auio.uio_rw = UIO_READ;
800 auio.uio_offset = 0;
801 auio.uio_resid = sizeof(gctx->reply);
7b95be2a 802 auio.uio_td = td;
984263bc
MD
803
804 rcvflg = 0;
805 error = soreceive(so, NULL, &auio,
806 NULL, NULL, &rcvflg);
807 gctx->secs = time_second - gctx->starttime;
808 for (ifctx = gctx->interfaces;
809 ifctx != NULL;
810 ifctx = ifctx->next) {
811 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
812 bootpc_ifctx_isfailed(ifctx) != 0)
813 continue;
814
815 ifctx->call.secs = htons(gctx->secs);
816 }
817 if (error == EWOULDBLOCK)
818 continue;
819 if (error != 0)
820 goto out;
821 len = sizeof(gctx->reply) - auio.uio_resid;
822
823 /* Do we have the required number of bytes ? */
824 if (len < BOOTP_MIN_LEN)
825 continue;
826 gctx->replylen = len;
827
828 /* Is it a reply? */
829 if (gctx->reply.op != BOOTP_REPLY)
830 continue;
831
832 /* Is this an answer to our query */
833 for (ifctx = gctx->interfaces;
834 ifctx != NULL;
835 ifctx = ifctx->next) {
836 if (gctx->reply.xid != ifctx->call.xid)
837 continue;
838
839 /* Same HW address size ? */
840 if (gctx->reply.hlen != ifctx->call.hlen)
841 continue;
842
843 /* Correct HW address ? */
844 if (bcmp(gctx->reply.chaddr,
845 ifctx->call.chaddr,
846 ifctx->call.hlen) != 0)
847 continue;
848
849 break;
850 }
851
852 if (ifctx != NULL) {
853 s = bootpc_tag(&gctx->tmptag,
854 &gctx->reply,
855 gctx->replylen,
856 TAG_DHCP_MSGTYPE);
857 if (s != NULL) {
858 switch (*s) {
859 case DHCP_OFFER:
860 s = "DHCP Offer";
861 break;
862 case DHCP_ACK:
863 s = "DHCP Ack";
864 break;
865 default:
866 s = "DHCP (unexpected)";
867 break;
868 }
869 } else
870 s = "BOOTP Reply";
871
086c1d7e 872 kprintf("Received %s packet"
984263bc
MD
873 " on %s from ",
874 s,
875 ifctx->ireq.ifr_name);
876 print_in_addr(gctx->reply.siaddr);
877 if (gctx->reply.giaddr.s_addr !=
878 htonl(INADDR_ANY)) {
086c1d7e 879 kprintf(" via ");
984263bc
MD
880 print_in_addr(gctx->reply.giaddr);
881 }
882 if (bootpc_received(gctx, ifctx) != 0) {
086c1d7e 883 kprintf(" (accepted)");
984263bc
MD
884 if (ifctx->outstanding) {
885 ifctx->outstanding = 0;
886 outstanding--;
887 }
888 /* Network settle delay */
889 if (outstanding == 0)
890 atimo = time_second +
891 BOOTP_SETTLE_DELAY;
892 } else
086c1d7e 893 kprintf(" (ignored)");
984263bc
MD
894 if (ifctx->gotrootpath) {
895 gotrootpath = 1;
896 rtimo = time_second +
897 BOOTP_SETTLE_DELAY;
086c1d7e 898 kprintf(" (got root path)");
984263bc 899 } else
086c1d7e
SW
900 kprintf(" (no root path)");
901 kprintf("\n");
984263bc
MD
902 }
903 } /* while secs */
904#ifdef BOOTP_TIMEOUT
905 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
906 break;
907#endif
908 /* Force a retry if halfway in DHCP negotiation */
909 retry = 0;
910 for (ifctx = gctx->interfaces; ifctx != NULL;
911 ifctx = ifctx->next) {
912 if (ifctx->state == IF_DHCP_OFFERED) {
913 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
914 retry = 1;
915 else
916 ifctx->state = IF_DHCP_UNRESOLVED;
917 }
918 }
919
920 if (retry != 0)
921 continue;
922
923 if (gotrootpath != 0) {
924 gctx->gotrootpath = gotrootpath;
925 if (rtimo != 0 && time_second >= rtimo)
926 break;
927 }
928 } /* forever send/receive */
929
930 /*
931 * XXX: These are errors of varying seriousness being silently
932 * ignored
933 */
934
935 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
936 if (bootpc_ifctx_isresolved(ifctx) == 0) {
086c1d7e 937 kprintf("%s timeout for interface %s\n",
984263bc
MD
938 ifctx->dhcpquerytype != DHCP_NOMSG ?
939 "DHCP" : "BOOTP",
940 ifctx->ireq.ifr_name);
941 }
942 }
943 if (gctx->gotrootpath != 0) {
944#if 0
086c1d7e 945 kprintf("Got a root path, ignoring remaining timeout\n");
984263bc
MD
946#endif
947 error = 0;
948 goto out;
949 }
950#ifndef BOOTP_NFSROOT
951 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
952 if (bootpc_ifctx_isresolved(ifctx) != 0) {
953 error = 0;
954 goto out;
955 }
956 }
957#endif
958 error = ETIMEDOUT;
959 goto out;
960
961gotreply:
962out:
9ba76b73 963 soclose(so, FNONBLOCK);
984263bc
MD
964 return error;
965}
966
967
968static int
969bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
970 struct bootpc_globalcontext *gctx,
7b95be2a 971 struct thread *td)
984263bc
MD
972{
973 struct sockaddr_in *sin;
974 int error;
975
976 struct ifreq *ireq;
977 struct socket *so;
978 struct ifaddr *ifa;
979 struct sockaddr_dl *sdl;
980
7b95be2a 981 error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td);
984263bc
MD
982 if (error != 0)
983 panic("nfs_boot: socreate, error=%d", error);
984
985 ireq = &ifctx->ireq;
986 so = ifctx->so;
987
988 /*
989 * Bring up the interface.
990 *
991 * Get the old interface flags and or IFF_UP into them; if
992 * IFF_UP set blindly, interface selection can be clobbered.
993 */
71ed21e4 994 error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
995 if (error != 0)
996 panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
997 ireq->ifr_flags |= IFF_UP;
71ed21e4 998 error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
999 if (error != 0)
1000 panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
1001
1002 /*
1003 * Do enough of ifconfig(8) so that the chosen interface
1004 * can talk to the servers. (just set the address)
1005 */
1006
1007 /* addr is 0.0.0.0 */
1008
1009 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1010 clear_sinaddr(sin);
71ed21e4 1011 error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1012 if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
1013 panic("bootpc_fakeup_interface: "
1014 "set if addr, error=%d", error);
1015
1016 /* netmask is 255.0.0.0 */
1017
1018 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1019 clear_sinaddr(sin);
1020 sin->sin_addr.s_addr = htonl(0xff000000u);
71ed21e4 1021 error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1022 if (error != 0)
1023 panic("bootpc_fakeup_interface: set if netmask, error=%d",
1024 error);
1025
1026 /* Broadcast is 255.255.255.255 */
1027
1028 sin = (struct sockaddr_in *)&ireq->ifr_addr;
1029 clear_sinaddr(sin);
1030 clear_sinaddr(&ifctx->broadcast);
1031 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
1032 ifctx->broadcast.sin_addr.s_addr = sin->sin_addr.s_addr;
1033
71ed21e4 1034 error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1035 if (error != 0 && error != EADDRNOTAVAIL)
1036 panic("bootpc_fakeup_interface: "
1037 "set if broadcast addr, error=%d",
1038 error);
1039 error = 0;
1040
1041 /* Get HW address */
1042
1043 sdl = NULL;
ba127861 1044 TAILQ_FOREACH(ifa, &ifctx->ifp->if_addrhead, ifa_link)
984263bc
MD
1045 if (ifa->ifa_addr->sa_family == AF_LINK &&
1046 (sdl = ((struct sockaddr_dl *) ifa->ifa_addr)) != NULL &&
1047 sdl->sdl_type == IFT_ETHER)
1048 break;
1049
1050 if (sdl == NULL)
1051 panic("bootpc: Unable to find HW address for %s",
1052 ifctx->ireq.ifr_name);
1053 ifctx->sdl = sdl;
1054
1055 return error;
1056}
1057
1058
1059static int
1060bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
1061 struct bootpc_globalcontext *gctx,
7b95be2a 1062 struct thread *td)
984263bc
MD
1063{
1064 int error;
1065 struct sockaddr_in defdst;
1066 struct sockaddr_in defmask;
1067 struct sockaddr_in *sin;
1068
1069 struct ifreq *ireq;
1070 struct socket *so;
1071 struct sockaddr_in *myaddr;
1072 struct sockaddr_in *netmask;
1073 struct sockaddr_in *gw;
1074
1075 ireq = &ifctx->ireq;
1076 so = ifctx->so;
1077 myaddr = &ifctx->myaddr;
1078 netmask = &ifctx->netmask;
1079 gw = &ifctx->gw;
1080
1081 if (bootpc_ifctx_isresolved(ifctx) == 0) {
1082
1083 /* Shutdown interfaces where BOOTP failed */
1084
086c1d7e 1085 kprintf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
71ed21e4 1086 error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1087 if (error != 0)
1088 panic("bootpc_adjust_interface: "
1089 "SIOCGIFFLAGS, error=%d", error);
1090 ireq->ifr_flags &= ~IFF_UP;
71ed21e4 1091 error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1092 if (error != 0)
1093 panic("bootpc_adjust_interface: "
1094 "SIOCSIFFLAGS, error=%d", error);
1095
1096 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1097 clear_sinaddr(sin);
71ed21e4 1098 error = ifioctl(so, SIOCDIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1099 if (error != 0 && (error != EADDRNOTAVAIL ||
1100 ifctx == gctx->interfaces))
1101 panic("bootpc_adjust_interface: "
1102 "SIOCDIFADDR, error=%d", error);
1103
1104 return 0;
1105 }
1106
086c1d7e 1107 kprintf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
984263bc
MD
1108 /*
1109 * Do enough of ifconfig(8) so that the chosen interface
1110 * can talk to the servers. (just set the address)
1111 */
1112 bcopy(netmask, &ireq->ifr_addr, sizeof(*netmask));
71ed21e4 1113 error = ifioctl(so, SIOCSIFNETMASK, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1114 if (error != 0)
1115 panic("bootpc_adjust_interface: "
1116 "set if netmask, error=%d", error);
1117
1118 /* Broadcast is with host part of IP address all 1's */
1119
1120 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1121 clear_sinaddr(sin);
1122 sin->sin_addr.s_addr = myaddr->sin_addr.s_addr |
1123 ~ netmask->sin_addr.s_addr;
71ed21e4 1124 error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1125 if (error != 0)
1126 panic("bootpc_adjust_interface: "
1127 "set if broadcast addr, error=%d", error);
1128
1129 bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr));
71ed21e4 1130 error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1131 if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
1132 panic("bootpc_adjust_interface: "
1133 "set if addr, error=%d", error);
1134
1135 /* Add new default route */
1136
1137 if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
1138 clear_sinaddr(&defdst);
1139 clear_sinaddr(&defmask);
ecdefdda
MD
1140 error = rtrequest_global(RTM_ADD, (struct sockaddr *) &defdst,
1141 (struct sockaddr *) gw,
1142 (struct sockaddr *) &defmask,
1143 (RTF_UP | RTF_GATEWAY | RTF_STATIC));
984263bc 1144 if (error != 0) {
086c1d7e 1145 kprintf("bootpc_adjust_interface: "
984263bc
MD
1146 "add net route, error=%d\n", error);
1147 return error;
1148 }
1149 }
1150
1151 return 0;
1152}
1153
984263bc
MD
1154static void
1155print_sin_addr(struct sockaddr_in *sin)
1156{
1157 print_in_addr(sin->sin_addr);
1158}
1159
1160
1161static void
1162print_in_addr(struct in_addr addr)
1163{
1164 unsigned int ip;
1165
1166 ip = ntohl(addr.s_addr);
086c1d7e 1167 kprintf("%d.%d.%d.%d",
984263bc
MD
1168 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1169}
1170
1171static void
e851b29e
CP
1172bootpc_compose_query(struct bootpc_ifcontext *ifctx,
1173 struct bootpc_globalcontext *gctx, struct thread *td)
984263bc
MD
1174{
1175 unsigned char *vendp;
1176 unsigned char vendor_client[64];
1177 uint32_t leasetime;
1178 uint8_t vendor_client_len;
1179
1180 ifctx->gotrootpath = 0;
1181
1182 bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
1183
1184 /* bootpc part */
1185 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1186 ifctx->call.htype = 1; /* 10mb ethernet */
1187 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1188 ifctx->call.hops = 0;
1189 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1190 ifctx->xid++;
1191 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1192 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1193
1194 vendp = ifctx->call.vend;
1195 *vendp++ = 99; /* RFC1048 cookie */
1196 *vendp++ = 130;
1197 *vendp++ = 83;
1198 *vendp++ = 99;
1199 *vendp++ = TAG_MAXMSGSIZE;
1200 *vendp++ = 2;
1201 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1202 *vendp++ = sizeof(struct bootp_packet) & 255;
1203
f8c7a42d 1204 ksnprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
984263bc
MD
1205 ostype, MACHINE, osrelease);
1206 vendor_client_len = strlen(vendor_client);
1207 *vendp++ = TAG_VENDOR_INDENTIFIER;
1208 *vendp++ = vendor_client_len;
1209 memcpy(vendp, vendor_client, vendor_client_len);
fc6d0222 1210 vendp += vendor_client_len;
984263bc
MD
1211 ifctx->dhcpquerytype = DHCP_NOMSG;
1212 switch (ifctx->state) {
1213 case IF_DHCP_UNRESOLVED:
1214 *vendp++ = TAG_DHCP_MSGTYPE;
1215 *vendp++ = 1;
1216 *vendp++ = DHCP_DISCOVER;
1217 ifctx->dhcpquerytype = DHCP_DISCOVER;
1218 ifctx->gotdhcpserver = 0;
1219 break;
1220 case IF_DHCP_OFFERED:
1221 *vendp++ = TAG_DHCP_MSGTYPE;
1222 *vendp++ = 1;
1223 *vendp++ = DHCP_REQUEST;
1224 ifctx->dhcpquerytype = DHCP_REQUEST;
1225 *vendp++ = TAG_DHCP_REQ_ADDR;
1226 *vendp++ = 4;
1227 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1228 vendp += 4;
1229 if (ifctx->gotdhcpserver != 0) {
1230 *vendp++ = TAG_DHCP_SERVERID;
1231 *vendp++ = 4;
1232 memcpy(vendp, &ifctx->dhcpserver, 4);
1233 vendp += 4;
1234 }
1235 *vendp++ = TAG_DHCP_LEASETIME;
1236 *vendp++ = 4;
1237 leasetime = htonl(300);
1238 memcpy(vendp, &leasetime, 4);
1239 vendp += 4;
1240 default:
1241 ;
1242 }
1243 *vendp = TAG_END;
1244
1245 ifctx->call.secs = 0;
1246 ifctx->call.flags = htons(0x8000); /* We need an broadcast answer */
1247}
1248
1249
1250static int
1251bootpc_hascookie(struct bootp_packet *bp)
1252{
1253 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1254 bp->vend[2] == 83 && bp->vend[3] == 99);
1255}
1256
1257
1258static void
1259bootpc_tag_helper(struct bootpc_tagcontext *tctx,
e851b29e 1260 unsigned char *start, int len, int tag)
984263bc
MD
1261{
1262 unsigned char *j;
1263 unsigned char *ej;
1264 unsigned char code;
1265
1266 if (tctx->badtag != 0 || tctx->badopt != 0)
1267 return;
1268
1269 j = start;
1270 ej = j + len;
1271
1272 while (j < ej) {
1273 code = *j++;
1274 if (code == TAG_PAD)
1275 continue;
1276 if (code == TAG_END)
1277 return;
1278 if (j >= ej || j + *j + 1 > ej) {
1279 tctx->badopt = 1;
1280 return;
1281 }
1282 len = *j++;
1283 if (code == tag) {
1284 if (tctx->taglen + len > TAG_MAXLEN) {
1285 tctx->badtag = 1;
1286 return;
1287 }
1288 tctx->foundopt = 1;
1289 if (len > 0)
1290 memcpy(tctx->buf + tctx->taglen,
1291 j, len);
1292 tctx->taglen += len;
1293 }
1294 if (code == TAG_OVERLOAD)
1295 tctx->overload = *j;
1296
1297 j += len;
1298 }
1299}
1300
1301
1302static unsigned char *
e851b29e
CP
1303bootpc_tag(struct bootpc_tagcontext *tctx, struct bootp_packet *bp,
1304 int len, int tag)
984263bc
MD
1305{
1306 unsigned char *j;
1307 unsigned char *ej;
1308
1309 tctx->overload = 0;
1310 tctx->badopt = 0;
1311 tctx->badtag = 0;
1312 tctx->foundopt = 0;
1313 tctx->taglen = 0;
1314
1315 if (bootpc_hascookie(bp) == 0)
1316 return NULL;
1317
1318 j = &bp->vend[4];
1319 ej = (unsigned char *) bp + len;
1320
1321 bootpc_tag_helper(tctx, &bp->vend[4],
1322 (unsigned char *) bp + len - &bp->vend[4], tag);
1323
1324 if ((tctx->overload & OVERLOAD_FILE) != 0)
1325 bootpc_tag_helper(tctx,
1326 (unsigned char *) bp->file,
1327 sizeof(bp->file),
1328 tag);
1329 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1330 bootpc_tag_helper(tctx,
1331 (unsigned char *) bp->sname,
1332 sizeof(bp->sname),
1333 tag);
1334
1335 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1336 return NULL;
1337 tctx->buf[tctx->taglen] = '\0';
1338 return tctx->buf;
1339}
1340
1341
1342static void
e851b29e
CP
1343bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1344 struct bootpc_globalcontext *gctx)
984263bc
MD
1345{
1346 char *p;
1347 unsigned int ip;
1348
1349 ifctx->gotgw = 0;
1350 ifctx->gotnetmask = 0;
1351
1352 clear_sinaddr(&ifctx->myaddr);
1353 clear_sinaddr(&ifctx->netmask);
1354 clear_sinaddr(&ifctx->gw);
1355
1356 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1357
1358 ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
f8c7a42d 1359 ksnprintf(gctx->lookup_path, sizeof(gctx->lookup_path),
984263bc
MD
1360 "swap.%d.%d.%d.%d",
1361 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1362
086c1d7e 1363 kprintf("%s at ", ifctx->ireq.ifr_name);
984263bc 1364 print_sin_addr(&ifctx->myaddr);
086c1d7e 1365 kprintf(" server ");
984263bc
MD
1366 print_in_addr(ifctx->reply.siaddr);
1367
1368 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1369 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
086c1d7e 1370 kprintf(" via gateway ");
984263bc
MD
1371 print_in_addr(ifctx->reply.giaddr);
1372 }
1373
1374 /* This call used for the side effect (overload flag) */
1375 (void) bootpc_tag(&gctx->tmptag,
1376 &ifctx->reply, ifctx->replylen, TAG_END);
1377
1378 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1379 if (ifctx->reply.sname[0] != '\0')
086c1d7e 1380 kprintf(" server name %s", ifctx->reply.sname);
984263bc
MD
1381 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1382 if (ifctx->reply.file[0] != '\0')
086c1d7e 1383 kprintf(" boot file %s", ifctx->reply.file);
984263bc 1384
086c1d7e 1385 kprintf("\n");
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MD
1386
1387 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1388 TAG_SUBNETMASK);
1389 if (p != NULL) {
1390 if (gctx->tag.taglen != 4)
1391 panic("bootpc: subnet mask len is %d",
1392 gctx->tag.taglen);
1393 bcopy(p, &ifctx->netmask.sin_addr, 4);
1394 ifctx->gotnetmask = 1;
086c1d7e 1395 kprintf("subnet mask ");
984263bc 1396 print_sin_addr(&ifctx->netmask);
086c1d7e 1397 kprintf(" ");
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MD
1398 }
1399
1400 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1401 TAG_ROUTERS);
1402 if (p != NULL) {
1403 /* Routers */
1404 if (gctx->tag.taglen % 4)
1405 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1406 if (gctx->tag.taglen > 0) {
1407 bcopy(p, &ifctx->gw.sin_addr, 4);
086c1d7e 1408 kprintf("router ");
984263bc 1409 print_sin_addr(&ifctx->gw);
086c1d7e 1410 kprintf(" ");
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MD
1411 ifctx->gotgw = 1;
1412 gctx->gotgw = 1;
1413 }
1414 }
1415
1416 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1417 TAG_ROOT);
1418 if (p != NULL) {
1419 if (gctx->setrootfs != NULL) {
086c1d7e 1420 kprintf("rootfs %s (ignored) ", p);
984263bc
MD
1421 } else if (setfs(&nd->root_saddr,
1422 nd->root_hostnam, p)) {
086c1d7e 1423 kprintf("rootfs %s ",p);
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MD
1424 gctx->gotrootpath = 1;
1425 ifctx->gotrootpath = 1;
1426 gctx->setrootfs = ifctx;
1427
1428 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1429 ifctx->replylen,
1430 TAG_ROOTOPTS);
1431 if (p != NULL) {
1432 mountopts(&nd->root_args, p);
086c1d7e 1433 kprintf("rootopts %s ", p);
984263bc
MD
1434 }
1435 } else
1436 panic("Failed to set rootfs to %s",p);
1437 }
1438
1439 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1440 TAG_SWAP);
1441 if (p != NULL) {
1442 if (gctx->setswapfs != NULL) {
086c1d7e 1443 kprintf("swapfs %s (ignored) ", p);
984263bc
MD
1444 } else if (setfs(&nd->swap_saddr,
1445 nd->swap_hostnam, p)) {
1446 gctx->gotswappath = 1;
1447 gctx->setswapfs = ifctx;
086c1d7e 1448 kprintf("swapfs %s ", p);
984263bc
MD
1449
1450 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1451 ifctx->replylen,
1452 TAG_SWAPOPTS);
1453 if (p != NULL) {
1454 /* swap mount options */
1455 mountopts(&nd->swap_args, p);
086c1d7e 1456 kprintf("swapopts %s ", p);
984263bc
MD
1457 }
1458
1459 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1460 ifctx->replylen,
1461 TAG_SWAPSIZE);
1462 if (p != NULL) {
1463 int swaplen;
1464 if (gctx->tag.taglen != 4)
1465 panic("bootpc: "
1466 "Expected 4 bytes for swaplen, "
1467 "not %d bytes",
1468 gctx->tag.taglen);
1469 bcopy(p, &swaplen, 4);
1470 nd->swap_nblks = ntohl(swaplen);
086c1d7e 1471 kprintf("swapsize %d KB ",
984263bc
MD
1472 nd->swap_nblks);
1473 }
1474 } else
1475 panic("Failed to set swapfs to %s", p);
1476 }
1477
1478 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1479 TAG_HOSTNAME);
1480 if (p != NULL) {
1481 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1482 panic("bootpc: hostname >= %d bytes",
1483 MAXHOSTNAMELEN);
1484 if (gctx->sethostname != NULL) {
086c1d7e 1485 kprintf("hostname %s (ignored) ", p);
984263bc
MD
1486 } else {
1487 strcpy(nd->my_hostnam, p);
1488 strcpy(hostname, p);
086c1d7e 1489 kprintf("hostname %s ",hostname);
984263bc
MD
1490 gctx->sethostname = ifctx;
1491 }
1492 }
1493 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1494 TAG_COOKIE);
1495 if (p != NULL) { /* store in a sysctl variable */
1496 int i, l = sizeof(bootp_cookie) - 1;
1497 for (i = 0; i < l && p[i] != '\0'; i++)
1498 bootp_cookie[i] = p[i];
1499 p[i] = '\0';
1500 }
1501
086c1d7e 1502 kprintf("\n");
984263bc
MD
1503
1504 if (ifctx->gotnetmask == 0) {
1505 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1506 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1507 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1508 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1509 else
1510 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1511 }
1512 if (ifctx->gotgw == 0) {
1513 /* Use proxyarp */
1514 ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
1515 }
1516}
1517
1518void
1519bootpc_init(void)
1520{
1521 struct bootpc_ifcontext *ifctx, *nctx; /* Interface BOOTP contexts */
1522 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1523 struct ifnet *ifp;
1524 int error;
1525 struct nfsv3_diskless *nd;
7b95be2a 1526 struct thread *td;
984263bc
MD
1527
1528 nd = &nfsv3_diskless;
7b95be2a 1529 td = curthread;
984263bc
MD
1530
1531 /*
1532 * If already filled in, don't touch it here
1533 */
1534 if (nfs_diskless_valid != 0)
1535 return;
1536
1537 /*
1538 * Wait until arp entries can be handled.
1539 */
1540 while (time_second == 0)
377d4740 1541 tsleep(&time_second, 0, "arpkludge", 10);
984263bc 1542
efda3bd0 1543 gctx = kmalloc(sizeof(*gctx), M_TEMP, M_WAITOK);
984263bc
MD
1544 if (gctx == NULL)
1545 panic("Failed to allocate bootp global context structure");
1546
1547 bzero(gctx, sizeof(*gctx));
1548 gctx->xid = ~0xFFFF;
1549 gctx->starttime = time_second;
1550
1551 ifctx = allocifctx(gctx);
1552
1553 /*
1554 * Find a network interface.
1555 */
1556#ifdef BOOTP_WIRED_TO
086c1d7e 1557 kprintf("bootpc_init: wired to interface '%s'\n",
984263bc
MD
1558 __XSTRING(BOOTP_WIRED_TO));
1559#endif
1560 bzero(&ifctx->ireq, sizeof(ifctx->ireq));
ba127861 1561 TAILQ_FOREACH(ifp, &ifnet, if_link) {
4beb866e
MD
1562 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1563 sizeof(ifctx->ireq.ifr_name));
984263bc
MD
1564#ifdef BOOTP_WIRED_TO
1565 if (strcmp(ifctx->ireq.ifr_name,
1566 __XSTRING(BOOTP_WIRED_TO)) != 0)
1567 continue;
1568#else
1569 if ((ifp->if_flags &
1570 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1571 IFF_BROADCAST)
1572 continue;
1573#endif
1574 if (gctx->interfaces != NULL)
1575 gctx->lastinterface->next = ifctx;
1576 else
1577 gctx->interfaces = ifctx;
1578 ifctx->ifp = ifp;
1579 gctx->lastinterface = ifctx;
1580 ifctx = allocifctx(gctx);
1581 }
efda3bd0 1582 kfree(ifctx, M_TEMP);
984263bc
MD
1583
1584 if (gctx->interfaces == NULL) {
1585#ifdef BOOTP_WIRED_TO
1586 panic("bootpc_init: Could not find interface specified "
1587 "by BOOTP_WIRED_TO: "
1588 __XSTRING(BOOTP_WIRED_TO));
1589#else
1590 panic("bootpc_init: no suitable interface");
1591#endif
1592 }
1593
1594 gctx->gotrootpath = 0;
1595 gctx->gotswappath = 0;
1596 gctx->gotgw = 0;
1597
1598 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
7b95be2a 1599 bootpc_fakeup_interface(ifctx, gctx, td);
984263bc
MD
1600
1601 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
7b95be2a 1602 bootpc_compose_query(ifctx, gctx, td);
984263bc
MD
1603
1604 ifctx = gctx->interfaces;
7b95be2a 1605 error = bootpc_call(gctx, td);
984263bc
MD
1606
1607 if (error != 0) {
1608#ifdef BOOTP_NFSROOT
1609 panic("BOOTP call failed");
1610#else
086c1d7e 1611 kprintf("BOOTP call failed\n");
984263bc
MD
1612#endif
1613 }
1614
1615 mountopts(&nd->root_args, NULL);
1616
1617 mountopts(&nd->swap_args, NULL);
1618
1619 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
1620 if (bootpc_ifctx_isresolved(ifctx) != 0)
1621 bootpc_decode_reply(nd, ifctx, gctx);
1622
1623 if (gctx->gotswappath == 0)
1624 nd->swap_nblks = 0;
1625#ifdef BOOTP_NFSROOT
1626 if (gctx->gotrootpath == 0)
1627 panic("bootpc: No root path offered");
1628#endif
1629
1630 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
7b95be2a 1631 bootpc_adjust_interface(ifctx, gctx, td);
984263bc 1632
9ba76b73 1633 soclose(ifctx->so, FNONBLOCK);
984263bc
MD
1634 }
1635
1636 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
1637 if (ifctx->gotrootpath != 0)
1638 break;
1639 if (ifctx == NULL) {
1640 for (ifctx = gctx->interfaces;
1641 ifctx != NULL;
1642 ifctx = ifctx->next)
1643 if (bootpc_ifctx_isresolved(ifctx) != 0)
1644 break;
1645 }
1646 if (ifctx == NULL)
1647 goto out;
1648
1649 if (gctx->gotrootpath != 0) {
1650
1651 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1652 nd->root_fh, &nd->root_fhsize,
7b95be2a 1653 &nd->root_args, td);
984263bc
MD
1654 if (error != 0)
1655 panic("nfs_boot: mountd root, error=%d", error);
1656
1657 if (gctx->gotswappath != 0) {
1658
1659 error = md_mount(&nd->swap_saddr,
1660 nd->swap_hostnam,
1661 nd->swap_fh, &nd->swap_fhsize,
7b95be2a 1662 &nd->swap_args, td);
984263bc
MD
1663 if (error != 0)
1664 panic("nfs_boot: mountd swap, error=%d",
1665 error);
1666
1667 error = md_lookup_swap(&nd->swap_saddr,
1668 gctx->lookup_path,
1669 nd->swap_fh, &nd->swap_fhsize,
7b95be2a 1670 &nd->swap_args, td);
984263bc
MD
1671 if (error != 0)
1672 panic("nfs_boot: lookup swap, error=%d",
1673 error);
1674 }
1675 nfs_diskless_valid = 3;
1676 }
1677
1678 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1679 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1680 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1681 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1682 ifctx->myaddr.sin_addr.s_addr |
1683 ~ ifctx->netmask.sin_addr.s_addr;
1684 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1685
1686out:
1687 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = nctx) {
1688 nctx = ifctx->next;
efda3bd0 1689 kfree(ifctx, M_TEMP);
984263bc 1690 }
efda3bd0 1691 kfree(gctx, M_TEMP);
984263bc
MD
1692}
1693