kernel/vfs: Remove some unused variables.
[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 $
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41 */
42
43#include "opt_bootp.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/sockio.h>
49#include <sys/proc.h>
50#include <sys/malloc.h>
51#include <sys/mount.h>
52#include <sys/mbuf.h>
53#include <sys/socket.h>
54#include <sys/socketvar.h>
55#include <sys/sysctl.h>
56#include <sys/uio.h>
469cf181 57#include <sys/fcntl.h>
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58
59#include <net/if.h>
60#include <net/route.h>
61
62#include <netinet/in.h>
63#include <net/if_types.h>
64#include <net/if_dl.h>
65
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66#include "rpcv2.h"
67#include "nfsproto.h"
68#include "nfs.h"
69#include "nfsdiskless.h"
70#include "krpc.h"
71#include "xdr_subs.h"
0e8ff41a 72#include "nfsmountrpc.h"
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73
74#define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
75
76#ifndef BOOTP_SETTLE_DELAY
77#define BOOTP_SETTLE_DELAY 3
78#endif
79
80/*
81 * What is the longest we will wait before re-sending a request?
82 * Note this is also the frequency of "RPC timeout" messages.
83 * The re-send loop count sup linearly to this maximum, so the
84 * first complaint will happen after (1+2+3+4+5)=15 seconds.
85 */
86#define MAX_RESEND_DELAY 5 /* seconds */
87
88/* Definitions from RFC951 */
89struct bootp_packet {
90 u_int8_t op;
91 u_int8_t htype;
92 u_int8_t hlen;
93 u_int8_t hops;
94 u_int32_t xid;
95 u_int16_t secs;
96 u_int16_t flags;
97 struct in_addr ciaddr;
98 struct in_addr yiaddr;
99 struct in_addr siaddr;
100 struct in_addr giaddr;
101 unsigned char chaddr[16];
102 char sname[64];
103 char file[128];
104 unsigned char vend[1222];
105};
106
107struct bootpc_ifcontext {
108 struct bootpc_ifcontext *next;
109 struct bootp_packet call;
110 struct bootp_packet reply;
111 int replylen;
112 int overload;
113 struct socket *so;
114 struct ifreq ireq;
115 struct ifnet *ifp;
116 struct sockaddr_dl *sdl;
117 struct sockaddr_in myaddr;
118 struct sockaddr_in netmask;
119 struct sockaddr_in gw;
120 struct sockaddr_in broadcast; /* Different for each interface */
121 int gotgw;
122 int gotnetmask;
123 int gotrootpath;
124 int outstanding;
125 int sentmsg;
126 u_int32_t xid;
127 enum {
128 IF_BOOTP_UNRESOLVED,
129 IF_BOOTP_RESOLVED,
130 IF_BOOTP_FAILED,
131 IF_DHCP_UNRESOLVED,
132 IF_DHCP_OFFERED,
133 IF_DHCP_RESOLVED,
134 IF_DHCP_FAILED,
135 } state;
136 int dhcpquerytype; /* dhcp type sent */
137 struct in_addr dhcpserver;
138 int gotdhcpserver;
139};
140
141#define TAG_MAXLEN 1024
142struct bootpc_tagcontext {
143 char buf[TAG_MAXLEN + 1];
144 int overload;
145 int badopt;
146 int badtag;
147 int foundopt;
148 int taglen;
149};
150
151struct bootpc_globalcontext {
152 struct bootpc_ifcontext *interfaces;
153 struct bootpc_ifcontext *lastinterface;
154 u_int32_t xid;
155 int gotrootpath;
156 int gotswappath;
157 int gotgw;
158 int ifnum;
159 int secs;
160 int starttime;
161 struct bootp_packet reply;
162 int replylen;
163 struct bootpc_ifcontext *setswapfs;
164 struct bootpc_ifcontext *setrootfs;
165 struct bootpc_ifcontext *sethostname;
166 char lookup_path[24];
167 struct bootpc_tagcontext tmptag;
168 struct bootpc_tagcontext tag;
169};
170
171#define IPPORT_BOOTPC 68
172#define IPPORT_BOOTPS 67
173
174#define BOOTP_REQUEST 1
175#define BOOTP_REPLY 2
176
177/* Common tags */
178#define TAG_PAD 0 /* Pad option, implicit length 1 */
179#define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */
180#define TAG_ROUTERS 3 /* Routers (in order of preference) */
181#define TAG_HOSTNAME 12 /* Client host name */
182#define TAG_ROOT 17 /* Root path */
183
184/* DHCP specific tags */
185#define TAG_OVERLOAD 52 /* Option Overload */
186#define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */
187
188#define TAG_END 255 /* End Option (i.e. no more options) */
189
190/* Overload values */
191#define OVERLOAD_FILE 1
192#define OVERLOAD_SNAME 2
193
194/* Site specific tags: */
195#define TAG_SWAP 128
196#define TAG_SWAPSIZE 129
197#define TAG_ROOTOPTS 130
198#define TAG_SWAPOPTS 131
199#define TAG_COOKIE 134 /* ascii info for userland, exported via sysctl */
200
201#define TAG_DHCP_MSGTYPE 53
202#define TAG_DHCP_REQ_ADDR 50
203#define TAG_DHCP_SERVERID 54
204#define TAG_DHCP_LEASETIME 51
205
206#define TAG_VENDOR_INDENTIFIER 60
207
208#define DHCP_NOMSG 0
209#define DHCP_DISCOVER 1
210#define DHCP_OFFER 2
211#define DHCP_REQUEST 3
212#define DHCP_ACK 5
213
984263bc 214static char bootp_cookie[128];
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215SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
216 bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
217
218/* mountd RPC */
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219static void print_in_addr(struct in_addr addr);
220static void print_sin_addr(struct sockaddr_in *addr);
221static void clear_sinaddr(struct sockaddr_in *sin);
222static
223struct bootpc_ifcontext *allocifctx(struct bootpc_globalcontext *gctx);
224static void bootpc_compose_query(struct bootpc_ifcontext *ifctx,
225 struct bootpc_globalcontext *gctx,
7b95be2a 226 struct thread *td);
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227static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
228 struct bootp_packet *bp, int len, int tag);
229static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
230 unsigned char *start, int len, int tag);
231
232#ifdef BOOTP_DEBUG
233void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma);
234void bootpboot_p_ma(struct sockaddr *ma);
235void bootpboot_p_rtentry(struct rtentry *rt);
236void bootpboot_p_tree(struct radix_node *rn);
237void bootpboot_p_rtlist(void);
238void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
239void bootpboot_p_iflist(void);
240#endif
241
242static int bootpc_call(struct bootpc_globalcontext *gctx,
7b95be2a 243 struct thread *td);
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244
245static int bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
246 struct bootpc_globalcontext *gctx,
7b95be2a 247 struct thread *td);
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248
249static int bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
250 struct bootpc_globalcontext *gctx,
7b95be2a 251 struct thread *td);
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252
253static void bootpc_decode_reply(struct nfsv3_diskless *nd,
254 struct bootpc_ifcontext *ifctx,
255 struct bootpc_globalcontext *gctx);
256
257static int bootpc_received(struct bootpc_globalcontext *gctx,
258 struct bootpc_ifcontext *ifctx);
259
260static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
261static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
262static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
263
264void bootpc_init(void);
265
266/*
267 * In order to have multiple active interfaces with address 0.0.0.0
268 * and be able to send data to a selected interface, we perform
269 * some tricks:
270 *
271 * - The 'broadcast' address is different for each interface.
272 *
273 * - We temporarily add routing pointing 255.255.255.255 to the
274 * selected interface broadcast address, thus the packet sent
275 * goes to that interface.
276 */
277
278#ifdef BOOTP_DEBUG
279void
e851b29e 280bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma)
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281{
282 if (sa == NULL) {
086c1d7e 283 kprintf("(sockaddr *) <null>");
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284 return;
285 }
286 switch (sa->sa_family) {
287 case AF_INET:
288 {
289 struct sockaddr_in *sin;
290
291 sin = (struct sockaddr_in *) sa;
086c1d7e 292 kprintf("inet ");
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293 print_sin_addr(sin);
294 if (ma != NULL) {
295 sin = (struct sockaddr_in *) ma;
086c1d7e 296 kprintf(" mask ");
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297 print_sin_addr(sin);
298 }
299 }
300 break;
301 case AF_LINK:
302 {
303 struct sockaddr_dl *sli;
304 int i;
305
306 sli = (struct sockaddr_dl *) sa;
086c1d7e 307 kprintf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
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308 for (i = 0; i < sli->sdl_alen; i++) {
309 if (i > 0)
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310 kprintf(":");
311 kprintf("%x", ((unsigned char *) LLADDR(sli))[i]);
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312 }
313 }
314 break;
315 default:
086c1d7e 316 kprintf("af%d", sa->sa_family);
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317 }
318}
319
320
321void
322bootpboot_p_ma(struct sockaddr *ma)
323{
324 if (ma == NULL) {
086c1d7e 325 kprintf("<null>");
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326 return;
327 }
086c1d7e 328 kprintf("%x", *(int *)ma);
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329}
330
331
332void
333bootpboot_p_rtentry(struct rtentry *rt)
334{
335 bootpboot_p_sa(rt_key(rt), rt_mask(rt));
086c1d7e 336 kprintf(" ");
984263bc 337 bootpboot_p_ma(rt->rt_genmask);
086c1d7e 338 kprintf(" ");
984263bc 339 bootpboot_p_sa(rt->rt_gateway, NULL);
086c1d7e
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340 kprintf(" ");
341 kprintf("flags %x", (unsigned short) rt->rt_flags);
342 kprintf(" %d", (int) rt->rt_rmx.rmx_expire);
343 kprintf(" %s\n", if_name(rt->rt_ifp));
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344}
345
346
347void
348bootpboot_p_tree(struct radix_node *rn)
349{
350 while (rn != NULL) {
351 if (rn->rn_bit < 0) {
352 if ((rn->rn_flags & RNF_ROOT) != 0) {
353 } else {
354 bootpboot_p_rtentry((struct rtentry *) rn);
355 }
356 rn = rn->rn_dupedkey;
357 } else {
358 bootpboot_p_tree(rn->rn_left);
359 bootpboot_p_tree(rn->rn_right);
360 return;
361 }
362 }
363}
364
365
366void
367bootpboot_p_rtlist(void)
368{
086c1d7e 369 kprintf("Routing table:\n");
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370 bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
371}
372
373
374void
375bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
376{
086c1d7e 377 kprintf("%s flags %x, addr ",
4beb866e 378 if_name(ifp),
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379 (unsigned short) ifp->if_flags);
380 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
086c1d7e 381 kprintf(", broadcast ");
984263bc 382 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
086c1d7e 383 kprintf(", netmask ");
984263bc 384 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
086c1d7e 385 kprintf("\n");
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386}
387
388
389void
390bootpboot_p_iflist(void)
391{
392 struct ifnet *ifp;
27eaa4f1 393 struct ifaddr_container *ifac;
984263bc 394
086c1d7e 395 kprintf("Interface list:\n");
ba127861 396 TAILQ_FOREACH(ifp, &ifnet, if_link) {
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397 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
398 struct ifaddr *ifa = ifac->ifa;
399
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400 if (ifa->ifa_addr->sa_family == AF_INET)
401 bootpboot_p_if(ifp, ifa);
27eaa4f1 402 }
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403 }
404}
405#endif /* defined(BOOTP_DEBUG) */
406
407
408static void
409clear_sinaddr(struct sockaddr_in *sin)
410{
411 bzero(sin, sizeof(*sin));
412 sin->sin_len = sizeof(*sin);
413 sin->sin_family = AF_INET;
414 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
415 sin->sin_port = 0;
416}
417
418
419static struct bootpc_ifcontext *
420allocifctx(struct bootpc_globalcontext *gctx)
421{
422 struct bootpc_ifcontext *ifctx;
77652cad 423 ifctx = (struct bootpc_ifcontext *) kmalloc(sizeof(*ifctx),
984263bc 424 M_TEMP, M_WAITOK);
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425 bzero(ifctx, sizeof(*ifctx));
426 ifctx->xid = gctx->xid;
427#ifdef BOOTP_NO_DHCP
428 ifctx->state = IF_BOOTP_UNRESOLVED;
429#else
430 ifctx->state = IF_DHCP_UNRESOLVED;
431#endif
432 gctx->xid += 0x100;
433 return ifctx;
434}
435
436
437static __inline int
438bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
439{
440 if (ifctx->state == IF_BOOTP_RESOLVED ||
441 ifctx->state == IF_DHCP_RESOLVED)
442 return 1;
443 return 0;
444}
445
446
447static __inline int
448bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
449{
450 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
451 ifctx->state == IF_DHCP_UNRESOLVED)
452 return 1;
453 return 0;
454}
455
456
457static __inline int
458bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
459{
460 if (ifctx->state == IF_BOOTP_FAILED ||
461 ifctx->state == IF_DHCP_FAILED)
462 return 1;
463 return 0;
464}
465
466
467static int
468bootpc_received(struct bootpc_globalcontext *gctx,
469 struct bootpc_ifcontext *ifctx)
470{
471 unsigned char dhcpreplytype;
472 char *p;
473 /*
474 * Need timeout for fallback to less
475 * desirable alternative.
476 */
477
478
479 /* This call used for the side effect (badopt flag) */
480 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
481 gctx->replylen,
482 TAG_END);
483
484 /* If packet is invalid, ignore it */
485 if (gctx->tmptag.badopt != 0)
486 return 0;
487
488 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
489 gctx->replylen, TAG_DHCP_MSGTYPE);
490 if (p != NULL)
491 dhcpreplytype = *p;
492 else
493 dhcpreplytype = DHCP_NOMSG;
494
495 switch (ifctx->dhcpquerytype) {
496 case DHCP_DISCOVER:
497 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
498#ifndef BOOTP_FORCE_DHCP
499 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
500#endif
501 )
502 return 0;
503 break;
504 case DHCP_REQUEST:
505 if (dhcpreplytype != DHCP_ACK)
506 return 0;
de1bbfa4 507 /* fall through */
984263bc 508 case DHCP_NOMSG:
de1bbfa4 509 break;
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MD
510 }
511
512
513 /* Ignore packet unless it gives us a root tag we didn't have */
514
515 if ((ifctx->state == IF_BOOTP_RESOLVED ||
516 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
517 (ifctx->state == IF_DHCP_OFFERED ||
518 ifctx->state == IF_DHCP_RESOLVED))) &&
519 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
520 ifctx->replylen,
521 TAG_ROOT) != NULL ||
522 bootpc_tag(&gctx->tmptag, &gctx->reply,
523 gctx->replylen,
524 TAG_ROOT) == NULL))
525 return 0;
526
527 bcopy(&gctx->reply,
528 &ifctx->reply,
529 gctx->replylen);
530 ifctx->replylen = gctx->replylen;
531
532 /* XXX: Only reset if 'perfect' response */
533 if (ifctx->state == IF_BOOTP_UNRESOLVED)
534 ifctx->state = IF_BOOTP_RESOLVED;
535 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
536 ifctx->dhcpquerytype == DHCP_DISCOVER) {
537 if (dhcpreplytype == DHCP_OFFER)
538 ifctx->state = IF_DHCP_OFFERED;
539 else
540 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
541 } else if (ifctx->state == IF_DHCP_OFFERED &&
542 ifctx->dhcpquerytype == DHCP_REQUEST)
543 ifctx->state = IF_DHCP_RESOLVED;
544
545
546 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
547 ifctx->state != IF_BOOTP_RESOLVED) {
548 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
549 ifctx->replylen, TAG_DHCP_SERVERID);
550 if (p != NULL && gctx->tmptag.taglen == 4) {
551 memcpy(&ifctx->dhcpserver, p, 4);
552 ifctx->gotdhcpserver = 1;
553 } else
554 ifctx->gotdhcpserver = 0;
555 return 1;
556 }
557
558 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
559 ifctx->replylen,
560 TAG_ROOT) != NULL);
561 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
562 ifctx->replylen,
563 TAG_ROUTERS) != NULL);
564 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
565 ifctx->replylen,
566 TAG_SUBNETMASK) != NULL);
567 return 1;
568}
569
570static int
e851b29e 571bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
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572{
573 struct socket *so;
574 struct sockaddr_in *sin, dst;
575 struct uio auio;
576 struct sockopt sopt;
577 struct iovec aio;
578 int error, on, rcvflg, timo, len;
579 time_t atimo;
580 time_t rtimo;
581 struct timeval tv;
582 struct bootpc_ifcontext *ifctx;
583 int outstanding;
584 int gotrootpath;
585 int retry;
586 const char *s;
587
588 /*
589 * Create socket and set its recieve timeout.
590 */
7b95be2a 591 error = socreate(AF_INET, &so, SOCK_DGRAM, 0, td);
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592 if (error != 0)
593 goto out;
594
595 tv.tv_sec = 1;
596 tv.tv_usec = 0;
597 bzero(&sopt, sizeof(sopt));
598 sopt.sopt_level = SOL_SOCKET;
599 sopt.sopt_name = SO_RCVTIMEO;
600 sopt.sopt_val = &tv;
601 sopt.sopt_valsize = sizeof tv;
602
603 error = sosetopt(so, &sopt);
604 if (error != 0)
605 goto out;
606
607 /*
608 * Enable broadcast.
609 */
610 on = 1;
611 sopt.sopt_name = SO_BROADCAST;
612 sopt.sopt_val = &on;
613 sopt.sopt_valsize = sizeof on;
614
615 error = sosetopt(so, &sopt);
616 if (error != 0)
617 goto out;
618
619 /*
620 * Disable routing.
621 */
622
623 on = 1;
624 sopt.sopt_name = SO_DONTROUTE;
625 sopt.sopt_val = &on;
626 sopt.sopt_valsize = sizeof on;
627
628 error = sosetopt(so, &sopt);
629 if (error != 0)
630 goto out;
631
632 /*
633 * Bind the local endpoint to a bootp client port.
634 */
635 sin = &dst;
636 clear_sinaddr(sin);
637 sin->sin_port = htons(IPPORT_BOOTPC);
7b95be2a 638 error = sobind(so, (struct sockaddr *)sin, td);
984263bc 639 if (error != 0) {
086c1d7e 640 kprintf("bind failed\n");
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641 goto out;
642 }
643
644 /*
645 * Setup socket address for the server.
646 */
647 sin = &dst;
648 clear_sinaddr(sin);
649 sin->sin_addr.s_addr = INADDR_BROADCAST;
650 sin->sin_port = htons(IPPORT_BOOTPS);
651
652 /*
653 * Send it, repeatedly, until a reply is received,
654 * but delay each re-send by an increasing amount.
655 * If the delay hits the maximum, start complaining.
656 */
657 timo = 0;
658 rtimo = 0;
659 for (;;) {
660
661 outstanding = 0;
662 gotrootpath = 0;
663
664 for (ifctx = gctx->interfaces;
665 ifctx != NULL;
666 ifctx = ifctx->next) {
667 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
668 bootpc_tag(&gctx->tmptag, &ifctx->reply,
669 ifctx->replylen,
670 TAG_ROOT) != NULL)
671 gotrootpath = 1;
672 }
673
674 for (ifctx = gctx->interfaces;
675 ifctx != NULL;
676 ifctx = ifctx->next) {
677 ifctx->outstanding = 0;
678 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
679 gotrootpath != 0) {
680 continue;
681 }
682 if (bootpc_ifctx_isfailed(ifctx) != 0)
683 continue;
684
685 outstanding++;
686 ifctx->outstanding = 1;
687
688 /* Proceed to next step in DHCP negotiation */
689 if ((ifctx->state == IF_DHCP_OFFERED &&
690 ifctx->dhcpquerytype != DHCP_REQUEST) ||
691 (ifctx->state == IF_DHCP_UNRESOLVED &&
692 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
693 (ifctx->state == IF_BOOTP_UNRESOLVED &&
694 ifctx->dhcpquerytype != DHCP_NOMSG)) {
695 ifctx->sentmsg = 0;
7b95be2a 696 bootpc_compose_query(ifctx, gctx, td);
984263bc
MD
697 }
698
699 /* Send BOOTP request (or re-send). */
700
701 if (ifctx->sentmsg == 0) {
702 switch(ifctx->dhcpquerytype) {
703 case DHCP_DISCOVER:
704 s = "DHCP Discover";
705 break;
706 case DHCP_REQUEST:
707 s = "DHCP Request";
708 break;
709 case DHCP_NOMSG:
710 default:
711 s = "BOOTP Query";
712 break;
713 }
086c1d7e 714 kprintf("Sending %s packet from "
984263bc
MD
715 "interface %s (%*D)\n",
716 s,
717 ifctx->ireq.ifr_name,
718 ifctx->sdl->sdl_alen,
719 (unsigned char *) LLADDR(ifctx->sdl),
720 ":");
721 ifctx->sentmsg = 1;
722 }
723
724 aio.iov_base = (caddr_t) &ifctx->call;
725 aio.iov_len = sizeof(ifctx->call);
726
727 auio.uio_iov = &aio;
728 auio.uio_iovcnt = 1;
729 auio.uio_segflg = UIO_SYSSPACE;
730 auio.uio_rw = UIO_WRITE;
731 auio.uio_offset = 0;
732 auio.uio_resid = sizeof(ifctx->call);
7b95be2a 733 auio.uio_td = td;
984263bc
MD
734
735 /* Set netmask to 0.0.0.0 */
736
737 sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
738 clear_sinaddr(sin);
739 error = ifioctl(ifctx->so, SIOCSIFNETMASK,
71ed21e4 740 (caddr_t) &ifctx->ireq, proc0.p_ucred);
984263bc
MD
741 if (error != 0)
742 panic("bootpc_call:"
743 "set if netmask, error=%d",
744 error);
745
746 error = sosend(so, (struct sockaddr *) &dst,
7b95be2a 747 &auio, NULL, NULL, 0, td);
984263bc 748 if (error != 0) {
086c1d7e 749 kprintf("bootpc_call: sosend: %d state %08x\n",
984263bc
MD
750 error, (int) so->so_state);
751 }
752
753 /* XXX: Is this needed ? */
377d4740 754 tsleep(&error, 0, "bootpw", 10);
984263bc
MD
755
756 /* Set netmask to 255.0.0.0 */
757
758 sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
759 clear_sinaddr(sin);
760 sin->sin_addr.s_addr = htonl(0xff000000u);
761 error = ifioctl(ifctx->so, SIOCSIFNETMASK,
71ed21e4 762 (caddr_t) &ifctx->ireq, proc0.p_ucred);
984263bc
MD
763 if (error != 0)
764 panic("bootpc_call:"
765 "set if netmask, error=%d",
766 error);
767
768 }
769
770 if (outstanding == 0 &&
771 (rtimo == 0 || time_second >= rtimo)) {
772 error = 0;
773 goto gotreply;
774 }
775
776 /* Determine new timeout. */
777 if (timo < MAX_RESEND_DELAY)
778 timo++;
779 else {
086c1d7e 780 kprintf("DHCP/BOOTP timeout for server ");
984263bc 781 print_sin_addr(&dst);
086c1d7e 782 kprintf("\n");
984263bc
MD
783 }
784
785 /*
786 * Wait for up to timo seconds for a reply.
787 * The socket receive timeout was set to 1 second.
788 */
789 atimo = timo + time_second;
790 while (time_second < atimo) {
791 aio.iov_base = (caddr_t) &gctx->reply;
792 aio.iov_len = sizeof(gctx->reply);
793
794 auio.uio_iov = &aio;
795 auio.uio_iovcnt = 1;
796 auio.uio_segflg = UIO_SYSSPACE;
797 auio.uio_rw = UIO_READ;
798 auio.uio_offset = 0;
799 auio.uio_resid = sizeof(gctx->reply);
7b95be2a 800 auio.uio_td = td;
984263bc
MD
801
802 rcvflg = 0;
803 error = soreceive(so, NULL, &auio,
804 NULL, NULL, &rcvflg);
805 gctx->secs = time_second - gctx->starttime;
806 for (ifctx = gctx->interfaces;
807 ifctx != NULL;
808 ifctx = ifctx->next) {
809 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
810 bootpc_ifctx_isfailed(ifctx) != 0)
811 continue;
812
813 ifctx->call.secs = htons(gctx->secs);
814 }
815 if (error == EWOULDBLOCK)
816 continue;
817 if (error != 0)
818 goto out;
819 len = sizeof(gctx->reply) - auio.uio_resid;
820
821 /* Do we have the required number of bytes ? */
822 if (len < BOOTP_MIN_LEN)
823 continue;
824 gctx->replylen = len;
825
826 /* Is it a reply? */
827 if (gctx->reply.op != BOOTP_REPLY)
828 continue;
829
830 /* Is this an answer to our query */
831 for (ifctx = gctx->interfaces;
832 ifctx != NULL;
833 ifctx = ifctx->next) {
834 if (gctx->reply.xid != ifctx->call.xid)
835 continue;
836
837 /* Same HW address size ? */
838 if (gctx->reply.hlen != ifctx->call.hlen)
839 continue;
840
841 /* Correct HW address ? */
842 if (bcmp(gctx->reply.chaddr,
843 ifctx->call.chaddr,
844 ifctx->call.hlen) != 0)
845 continue;
846
847 break;
848 }
849
850 if (ifctx != NULL) {
851 s = bootpc_tag(&gctx->tmptag,
852 &gctx->reply,
853 gctx->replylen,
854 TAG_DHCP_MSGTYPE);
855 if (s != NULL) {
856 switch (*s) {
857 case DHCP_OFFER:
858 s = "DHCP Offer";
859 break;
860 case DHCP_ACK:
861 s = "DHCP Ack";
862 break;
863 default:
864 s = "DHCP (unexpected)";
865 break;
866 }
867 } else
868 s = "BOOTP Reply";
869
086c1d7e 870 kprintf("Received %s packet"
984263bc
MD
871 " on %s from ",
872 s,
873 ifctx->ireq.ifr_name);
874 print_in_addr(gctx->reply.siaddr);
875 if (gctx->reply.giaddr.s_addr !=
876 htonl(INADDR_ANY)) {
086c1d7e 877 kprintf(" via ");
984263bc
MD
878 print_in_addr(gctx->reply.giaddr);
879 }
880 if (bootpc_received(gctx, ifctx) != 0) {
086c1d7e 881 kprintf(" (accepted)");
984263bc
MD
882 if (ifctx->outstanding) {
883 ifctx->outstanding = 0;
884 outstanding--;
885 }
886 /* Network settle delay */
887 if (outstanding == 0)
888 atimo = time_second +
889 BOOTP_SETTLE_DELAY;
890 } else
086c1d7e 891 kprintf(" (ignored)");
984263bc
MD
892 if (ifctx->gotrootpath) {
893 gotrootpath = 1;
894 rtimo = time_second +
895 BOOTP_SETTLE_DELAY;
086c1d7e 896 kprintf(" (got root path)");
984263bc 897 } else
086c1d7e
SW
898 kprintf(" (no root path)");
899 kprintf("\n");
984263bc
MD
900 }
901 } /* while secs */
902#ifdef BOOTP_TIMEOUT
903 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
904 break;
905#endif
906 /* Force a retry if halfway in DHCP negotiation */
907 retry = 0;
908 for (ifctx = gctx->interfaces; ifctx != NULL;
909 ifctx = ifctx->next) {
910 if (ifctx->state == IF_DHCP_OFFERED) {
911 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
912 retry = 1;
913 else
914 ifctx->state = IF_DHCP_UNRESOLVED;
915 }
916 }
917
918 if (retry != 0)
919 continue;
920
921 if (gotrootpath != 0) {
922 gctx->gotrootpath = gotrootpath;
923 if (rtimo != 0 && time_second >= rtimo)
924 break;
925 }
926 } /* forever send/receive */
927
928 /*
929 * XXX: These are errors of varying seriousness being silently
930 * ignored
931 */
932
933 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
934 if (bootpc_ifctx_isresolved(ifctx) == 0) {
086c1d7e 935 kprintf("%s timeout for interface %s\n",
984263bc
MD
936 ifctx->dhcpquerytype != DHCP_NOMSG ?
937 "DHCP" : "BOOTP",
938 ifctx->ireq.ifr_name);
939 }
940 }
941 if (gctx->gotrootpath != 0) {
942#if 0
086c1d7e 943 kprintf("Got a root path, ignoring remaining timeout\n");
984263bc
MD
944#endif
945 error = 0;
946 goto out;
947 }
948#ifndef BOOTP_NFSROOT
949 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
950 if (bootpc_ifctx_isresolved(ifctx) != 0) {
951 error = 0;
952 goto out;
953 }
954 }
955#endif
956 error = ETIMEDOUT;
957 goto out;
958
959gotreply:
960out:
9ba76b73 961 soclose(so, FNONBLOCK);
984263bc
MD
962 return error;
963}
964
965
966static int
967bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
968 struct bootpc_globalcontext *gctx,
7b95be2a 969 struct thread *td)
984263bc 970{
b2632176 971 struct ifaddr_container *ifac;
984263bc
MD
972 struct sockaddr_in *sin;
973 int error;
974
975 struct ifreq *ireq;
976 struct socket *so;
984263bc
MD
977 struct sockaddr_dl *sdl;
978
7b95be2a 979 error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td);
984263bc
MD
980 if (error != 0)
981 panic("nfs_boot: socreate, error=%d", error);
982
983 ireq = &ifctx->ireq;
984 so = ifctx->so;
985
986 /*
987 * Bring up the interface.
988 *
989 * Get the old interface flags and or IFF_UP into them; if
990 * IFF_UP set blindly, interface selection can be clobbered.
991 */
71ed21e4 992 error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
993 if (error != 0)
994 panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
995 ireq->ifr_flags |= IFF_UP;
71ed21e4 996 error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
997 if (error != 0)
998 panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
999
1000 /*
1001 * Do enough of ifconfig(8) so that the chosen interface
1002 * can talk to the servers. (just set the address)
1003 */
1004
1005 /* addr is 0.0.0.0 */
1006
1007 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1008 clear_sinaddr(sin);
71ed21e4 1009 error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1010 if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
1011 panic("bootpc_fakeup_interface: "
1012 "set if addr, error=%d", error);
1013
1014 /* netmask is 255.0.0.0 */
1015
1016 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1017 clear_sinaddr(sin);
1018 sin->sin_addr.s_addr = htonl(0xff000000u);
71ed21e4 1019 error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1020 if (error != 0)
1021 panic("bootpc_fakeup_interface: set if netmask, error=%d",
1022 error);
1023
1024 /* Broadcast is 255.255.255.255 */
1025
1026 sin = (struct sockaddr_in *)&ireq->ifr_addr;
1027 clear_sinaddr(sin);
1028 clear_sinaddr(&ifctx->broadcast);
1029 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
1030 ifctx->broadcast.sin_addr.s_addr = sin->sin_addr.s_addr;
1031
71ed21e4 1032 error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1033 if (error != 0 && error != EADDRNOTAVAIL)
1034 panic("bootpc_fakeup_interface: "
1035 "set if broadcast addr, error=%d",
1036 error);
1037 error = 0;
1038
1039 /* Get HW address */
1040
1041 sdl = NULL;
b2632176
SZ
1042 TAILQ_FOREACH(ifac, &ifctx->ifp->if_addrheads[mycpuid], ifa_link) {
1043 struct ifaddr *ifa = ifac->ifa;
1044
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;
b2632176
SZ
1049 }
1050
984263bc
MD
1051 if (sdl == NULL)
1052 panic("bootpc: Unable to find HW address for %s",
1053 ifctx->ireq.ifr_name);
1054 ifctx->sdl = sdl;
1055
1056 return error;
1057}
1058
1059
1060static int
1061bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
1062 struct bootpc_globalcontext *gctx,
7b95be2a 1063 struct thread *td)
984263bc
MD
1064{
1065 int error;
1066 struct sockaddr_in defdst;
1067 struct sockaddr_in defmask;
1068 struct sockaddr_in *sin;
1069
1070 struct ifreq *ireq;
1071 struct socket *so;
1072 struct sockaddr_in *myaddr;
1073 struct sockaddr_in *netmask;
1074 struct sockaddr_in *gw;
1075
1076 ireq = &ifctx->ireq;
1077 so = ifctx->so;
1078 myaddr = &ifctx->myaddr;
1079 netmask = &ifctx->netmask;
1080 gw = &ifctx->gw;
1081
1082 if (bootpc_ifctx_isresolved(ifctx) == 0) {
1083
1084 /* Shutdown interfaces where BOOTP failed */
1085
086c1d7e 1086 kprintf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
71ed21e4 1087 error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1088 if (error != 0)
1089 panic("bootpc_adjust_interface: "
1090 "SIOCGIFFLAGS, error=%d", error);
1091 ireq->ifr_flags &= ~IFF_UP;
71ed21e4 1092 error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred);
984263bc
MD
1093 if (error != 0)
1094 panic("bootpc_adjust_interface: "
1095 "SIOCSIFFLAGS, error=%d", error);
1096
1097 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1098 clear_sinaddr(sin);
71ed21e4 1099 error = ifioctl(so, SIOCDIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1100 if (error != 0 && (error != EADDRNOTAVAIL ||
1101 ifctx == gctx->interfaces))
1102 panic("bootpc_adjust_interface: "
1103 "SIOCDIFADDR, error=%d", error);
1104
1105 return 0;
1106 }
1107
086c1d7e 1108 kprintf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
984263bc
MD
1109 /*
1110 * Do enough of ifconfig(8) so that the chosen interface
1111 * can talk to the servers. (just set the address)
1112 */
1113 bcopy(netmask, &ireq->ifr_addr, sizeof(*netmask));
71ed21e4 1114 error = ifioctl(so, SIOCSIFNETMASK, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1115 if (error != 0)
1116 panic("bootpc_adjust_interface: "
1117 "set if netmask, error=%d", error);
1118
1119 /* Broadcast is with host part of IP address all 1's */
1120
1121 sin = (struct sockaddr_in *) &ireq->ifr_addr;
1122 clear_sinaddr(sin);
1123 sin->sin_addr.s_addr = myaddr->sin_addr.s_addr |
1124 ~ netmask->sin_addr.s_addr;
71ed21e4 1125 error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1126 if (error != 0)
1127 panic("bootpc_adjust_interface: "
1128 "set if broadcast addr, error=%d", error);
1129
1130 bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr));
71ed21e4 1131 error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred);
984263bc
MD
1132 if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
1133 panic("bootpc_adjust_interface: "
1134 "set if addr, error=%d", error);
1135
1136 /* Add new default route */
1137
1138 if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
1139 clear_sinaddr(&defdst);
1140 clear_sinaddr(&defmask);
ecdefdda
MD
1141 error = rtrequest_global(RTM_ADD, (struct sockaddr *) &defdst,
1142 (struct sockaddr *) gw,
1143 (struct sockaddr *) &defmask,
1144 (RTF_UP | RTF_GATEWAY | RTF_STATIC));
984263bc 1145 if (error != 0) {
086c1d7e 1146 kprintf("bootpc_adjust_interface: "
984263bc
MD
1147 "add net route, error=%d\n", error);
1148 return error;
1149 }
1150 }
1151
1152 return 0;
1153}
1154
984263bc
MD
1155static void
1156print_sin_addr(struct sockaddr_in *sin)
1157{
1158 print_in_addr(sin->sin_addr);
1159}
1160
1161
1162static void
1163print_in_addr(struct in_addr addr)
1164{
1165 unsigned int ip;
1166
1167 ip = ntohl(addr.s_addr);
086c1d7e 1168 kprintf("%d.%d.%d.%d",
984263bc
MD
1169 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1170}
1171
1172static void
e851b29e
CP
1173bootpc_compose_query(struct bootpc_ifcontext *ifctx,
1174 struct bootpc_globalcontext *gctx, struct thread *td)
984263bc
MD
1175{
1176 unsigned char *vendp;
1177 unsigned char vendor_client[64];
1178 uint32_t leasetime;
1179 uint8_t vendor_client_len;
1180
1181 ifctx->gotrootpath = 0;
1182
1183 bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
1184
1185 /* bootpc part */
1186 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1187 ifctx->call.htype = 1; /* 10mb ethernet */
1188 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1189 ifctx->call.hops = 0;
1190 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1191 ifctx->xid++;
1192 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1193 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1194
1195 vendp = ifctx->call.vend;
1196 *vendp++ = 99; /* RFC1048 cookie */
1197 *vendp++ = 130;
1198 *vendp++ = 83;
1199 *vendp++ = 99;
1200 *vendp++ = TAG_MAXMSGSIZE;
1201 *vendp++ = 2;
1202 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1203 *vendp++ = sizeof(struct bootp_packet) & 255;
1204
f8c7a42d 1205 ksnprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
984263bc
MD
1206 ostype, MACHINE, osrelease);
1207 vendor_client_len = strlen(vendor_client);
1208 *vendp++ = TAG_VENDOR_INDENTIFIER;
1209 *vendp++ = vendor_client_len;
1210 memcpy(vendp, vendor_client, vendor_client_len);
fc6d0222 1211 vendp += vendor_client_len;
984263bc
MD
1212 ifctx->dhcpquerytype = DHCP_NOMSG;
1213 switch (ifctx->state) {
1214 case IF_DHCP_UNRESOLVED:
1215 *vendp++ = TAG_DHCP_MSGTYPE;
1216 *vendp++ = 1;
1217 *vendp++ = DHCP_DISCOVER;
1218 ifctx->dhcpquerytype = DHCP_DISCOVER;
1219 ifctx->gotdhcpserver = 0;
1220 break;
1221 case IF_DHCP_OFFERED:
1222 *vendp++ = TAG_DHCP_MSGTYPE;
1223 *vendp++ = 1;
1224 *vendp++ = DHCP_REQUEST;
1225 ifctx->dhcpquerytype = DHCP_REQUEST;
1226 *vendp++ = TAG_DHCP_REQ_ADDR;
1227 *vendp++ = 4;
1228 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1229 vendp += 4;
1230 if (ifctx->gotdhcpserver != 0) {
1231 *vendp++ = TAG_DHCP_SERVERID;
1232 *vendp++ = 4;
1233 memcpy(vendp, &ifctx->dhcpserver, 4);
1234 vendp += 4;
1235 }
1236 *vendp++ = TAG_DHCP_LEASETIME;
1237 *vendp++ = 4;
1238 leasetime = htonl(300);
1239 memcpy(vendp, &leasetime, 4);
1240 vendp += 4;
1241 default:
1242 ;
1243 }
1244 *vendp = TAG_END;
1245
1246 ifctx->call.secs = 0;
1247 ifctx->call.flags = htons(0x8000); /* We need an broadcast answer */
1248}
1249
1250
1251static int
1252bootpc_hascookie(struct bootp_packet *bp)
1253{
1254 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1255 bp->vend[2] == 83 && bp->vend[3] == 99);
1256}
1257
1258
1259static void
1260bootpc_tag_helper(struct bootpc_tagcontext *tctx,
e851b29e 1261 unsigned char *start, int len, int tag)
984263bc
MD
1262{
1263 unsigned char *j;
1264 unsigned char *ej;
1265 unsigned char code;
1266
1267 if (tctx->badtag != 0 || tctx->badopt != 0)
1268 return;
1269
1270 j = start;
1271 ej = j + len;
1272
1273 while (j < ej) {
1274 code = *j++;
1275 if (code == TAG_PAD)
1276 continue;
1277 if (code == TAG_END)
1278 return;
1279 if (j >= ej || j + *j + 1 > ej) {
1280 tctx->badopt = 1;
1281 return;
1282 }
1283 len = *j++;
1284 if (code == tag) {
1285 if (tctx->taglen + len > TAG_MAXLEN) {
1286 tctx->badtag = 1;
1287 return;
1288 }
1289 tctx->foundopt = 1;
1290 if (len > 0)
1291 memcpy(tctx->buf + tctx->taglen,
1292 j, len);
1293 tctx->taglen += len;
1294 }
1295 if (code == TAG_OVERLOAD)
1296 tctx->overload = *j;
1297
1298 j += len;
1299 }
1300}
1301
1302
1303static unsigned char *
e851b29e
CP
1304bootpc_tag(struct bootpc_tagcontext *tctx, struct bootp_packet *bp,
1305 int len, int tag)
984263bc 1306{
984263bc
MD
1307 tctx->overload = 0;
1308 tctx->badopt = 0;
1309 tctx->badtag = 0;
1310 tctx->foundopt = 0;
1311 tctx->taglen = 0;
1312
1313 if (bootpc_hascookie(bp) == 0)
1314 return NULL;
1315
984263bc
MD
1316 bootpc_tag_helper(tctx, &bp->vend[4],
1317 (unsigned char *) bp + len - &bp->vend[4], tag);
1318
1319 if ((tctx->overload & OVERLOAD_FILE) != 0)
1320 bootpc_tag_helper(tctx,
1321 (unsigned char *) bp->file,
1322 sizeof(bp->file),
1323 tag);
1324 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1325 bootpc_tag_helper(tctx,
1326 (unsigned char *) bp->sname,
1327 sizeof(bp->sname),
1328 tag);
1329
1330 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1331 return NULL;
1332 tctx->buf[tctx->taglen] = '\0';
1333 return tctx->buf;
1334}
1335
1336
1337static void
e851b29e
CP
1338bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1339 struct bootpc_globalcontext *gctx)
984263bc
MD
1340{
1341 char *p;
1342 unsigned int ip;
1343
1344 ifctx->gotgw = 0;
1345 ifctx->gotnetmask = 0;
1346
1347 clear_sinaddr(&ifctx->myaddr);
1348 clear_sinaddr(&ifctx->netmask);
1349 clear_sinaddr(&ifctx->gw);
1350
1351 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1352
1353 ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
f8c7a42d 1354 ksnprintf(gctx->lookup_path, sizeof(gctx->lookup_path),
984263bc
MD
1355 "swap.%d.%d.%d.%d",
1356 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1357
086c1d7e 1358 kprintf("%s at ", ifctx->ireq.ifr_name);
984263bc 1359 print_sin_addr(&ifctx->myaddr);
086c1d7e 1360 kprintf(" server ");
984263bc
MD
1361 print_in_addr(ifctx->reply.siaddr);
1362
1363 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1364 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
086c1d7e 1365 kprintf(" via gateway ");
984263bc
MD
1366 print_in_addr(ifctx->reply.giaddr);
1367 }
1368
1369 /* This call used for the side effect (overload flag) */
1370 (void) bootpc_tag(&gctx->tmptag,
1371 &ifctx->reply, ifctx->replylen, TAG_END);
1372
1373 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1374 if (ifctx->reply.sname[0] != '\0')
086c1d7e 1375 kprintf(" server name %s", ifctx->reply.sname);
984263bc
MD
1376 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1377 if (ifctx->reply.file[0] != '\0')
086c1d7e 1378 kprintf(" boot file %s", ifctx->reply.file);
984263bc 1379
086c1d7e 1380 kprintf("\n");
984263bc
MD
1381
1382 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1383 TAG_SUBNETMASK);
1384 if (p != NULL) {
1385 if (gctx->tag.taglen != 4)
1386 panic("bootpc: subnet mask len is %d",
1387 gctx->tag.taglen);
1388 bcopy(p, &ifctx->netmask.sin_addr, 4);
1389 ifctx->gotnetmask = 1;
086c1d7e 1390 kprintf("subnet mask ");
984263bc 1391 print_sin_addr(&ifctx->netmask);
086c1d7e 1392 kprintf(" ");
984263bc
MD
1393 }
1394
1395 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1396 TAG_ROUTERS);
1397 if (p != NULL) {
1398 /* Routers */
1399 if (gctx->tag.taglen % 4)
1400 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1401 if (gctx->tag.taglen > 0) {
1402 bcopy(p, &ifctx->gw.sin_addr, 4);
086c1d7e 1403 kprintf("router ");
984263bc 1404 print_sin_addr(&ifctx->gw);
086c1d7e 1405 kprintf(" ");
984263bc
MD
1406 ifctx->gotgw = 1;
1407 gctx->gotgw = 1;
1408 }
1409 }
1410
1411 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1412 TAG_ROOT);
1413 if (p != NULL) {
1414 if (gctx->setrootfs != NULL) {
086c1d7e 1415 kprintf("rootfs %s (ignored) ", p);
984263bc
MD
1416 } else if (setfs(&nd->root_saddr,
1417 nd->root_hostnam, p)) {
086c1d7e 1418 kprintf("rootfs %s ",p);
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MD
1419 gctx->gotrootpath = 1;
1420 ifctx->gotrootpath = 1;
1421 gctx->setrootfs = ifctx;
1422
1423 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1424 ifctx->replylen,
1425 TAG_ROOTOPTS);
1426 if (p != NULL) {
b9a7a2bd 1427 nfs_mountopts(&nd->root_args, p);
086c1d7e 1428 kprintf("rootopts %s ", p);
984263bc
MD
1429 }
1430 } else
1431 panic("Failed to set rootfs to %s",p);
1432 }
1433
1434 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1435 TAG_SWAP);
1436 if (p != NULL) {
1437 if (gctx->setswapfs != NULL) {
086c1d7e 1438 kprintf("swapfs %s (ignored) ", p);
984263bc
MD
1439 } else if (setfs(&nd->swap_saddr,
1440 nd->swap_hostnam, p)) {
1441 gctx->gotswappath = 1;
1442 gctx->setswapfs = ifctx;
086c1d7e 1443 kprintf("swapfs %s ", p);
984263bc
MD
1444
1445 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1446 ifctx->replylen,
1447 TAG_SWAPOPTS);
1448 if (p != NULL) {
1449 /* swap mount options */
b9a7a2bd 1450 nfs_mountopts(&nd->swap_args, p);
086c1d7e 1451 kprintf("swapopts %s ", p);
984263bc
MD
1452 }
1453
1454 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1455 ifctx->replylen,
1456 TAG_SWAPSIZE);
1457 if (p != NULL) {
1458 int swaplen;
1459 if (gctx->tag.taglen != 4)
1460 panic("bootpc: "
1461 "Expected 4 bytes for swaplen, "
1462 "not %d bytes",
1463 gctx->tag.taglen);
1464 bcopy(p, &swaplen, 4);
1465 nd->swap_nblks = ntohl(swaplen);
086c1d7e 1466 kprintf("swapsize %d KB ",
984263bc
MD
1467 nd->swap_nblks);
1468 }
1469 } else
1470 panic("Failed to set swapfs to %s", p);
1471 }
1472
1473 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1474 TAG_HOSTNAME);
1475 if (p != NULL) {
1476 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1477 panic("bootpc: hostname >= %d bytes",
1478 MAXHOSTNAMELEN);
1479 if (gctx->sethostname != NULL) {
086c1d7e 1480 kprintf("hostname %s (ignored) ", p);
984263bc
MD
1481 } else {
1482 strcpy(nd->my_hostnam, p);
1483 strcpy(hostname, p);
086c1d7e 1484 kprintf("hostname %s ",hostname);
984263bc
MD
1485 gctx->sethostname = ifctx;
1486 }
1487 }
1488 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1489 TAG_COOKIE);
1490 if (p != NULL) { /* store in a sysctl variable */
1491 int i, l = sizeof(bootp_cookie) - 1;
1492 for (i = 0; i < l && p[i] != '\0'; i++)
1493 bootp_cookie[i] = p[i];
1494 p[i] = '\0';
1495 }
1496
086c1d7e 1497 kprintf("\n");
984263bc
MD
1498
1499 if (ifctx->gotnetmask == 0) {
1500 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1501 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1502 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1503 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1504 else
1505 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1506 }
1507 if (ifctx->gotgw == 0) {
1508 /* Use proxyarp */
1509 ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
1510 }
1511}
1512
1513void
1514bootpc_init(void)
1515{
1516 struct bootpc_ifcontext *ifctx, *nctx; /* Interface BOOTP contexts */
1517 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1518 struct ifnet *ifp;
1519 int error;
1520 struct nfsv3_diskless *nd;
7b95be2a 1521 struct thread *td;
984263bc
MD
1522
1523 nd = &nfsv3_diskless;
7b95be2a 1524 td = curthread;
984263bc
MD
1525
1526 /*
1527 * If already filled in, don't touch it here
1528 */
1529 if (nfs_diskless_valid != 0)
1530 return;
1531
1532 /*
1533 * Wait until arp entries can be handled.
1534 */
1535 while (time_second == 0)
377d4740 1536 tsleep(&time_second, 0, "arpkludge", 10);
984263bc 1537
e7b4468c 1538 gctx = kmalloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
984263bc 1539
984263bc
MD
1540 gctx->xid = ~0xFFFF;
1541 gctx->starttime = time_second;
1542
1543 ifctx = allocifctx(gctx);
1544
1545 /*
1546 * Find a network interface.
1547 */
1548#ifdef BOOTP_WIRED_TO
086c1d7e 1549 kprintf("bootpc_init: wired to interface '%s'\n",
984263bc
MD
1550 __XSTRING(BOOTP_WIRED_TO));
1551#endif
1552 bzero(&ifctx->ireq, sizeof(ifctx->ireq));
ba127861 1553 TAILQ_FOREACH(ifp, &ifnet, if_link) {
4beb866e
MD
1554 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1555 sizeof(ifctx->ireq.ifr_name));
984263bc
MD
1556#ifdef BOOTP_WIRED_TO
1557 if (strcmp(ifctx->ireq.ifr_name,
1558 __XSTRING(BOOTP_WIRED_TO)) != 0)
1559 continue;
1560#else
1561 if ((ifp->if_flags &
1562 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1563 IFF_BROADCAST)
1564 continue;
1565#endif
1566 if (gctx->interfaces != NULL)
1567 gctx->lastinterface->next = ifctx;
1568 else
1569 gctx->interfaces = ifctx;
1570 ifctx->ifp = ifp;
1571 gctx->lastinterface = ifctx;
1572 ifctx = allocifctx(gctx);
1573 }
efda3bd0 1574 kfree(ifctx, M_TEMP);
984263bc
MD
1575
1576 if (gctx->interfaces == NULL) {
1577#ifdef BOOTP_WIRED_TO
1578 panic("bootpc_init: Could not find interface specified "
1579 "by BOOTP_WIRED_TO: "
1580 __XSTRING(BOOTP_WIRED_TO));
1581#else
1582 panic("bootpc_init: no suitable interface");
1583#endif
1584 }
1585
1586 gctx->gotrootpath = 0;
1587 gctx->gotswappath = 0;
1588 gctx->gotgw = 0;
1589
1590 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
7b95be2a 1591 bootpc_fakeup_interface(ifctx, gctx, td);
984263bc
MD
1592
1593 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
7b95be2a 1594 bootpc_compose_query(ifctx, gctx, td);
984263bc
MD
1595
1596 ifctx = gctx->interfaces;
7b95be2a 1597 error = bootpc_call(gctx, td);
984263bc
MD
1598
1599 if (error != 0) {
1600#ifdef BOOTP_NFSROOT
1601 panic("BOOTP call failed");
1602#else
086c1d7e 1603 kprintf("BOOTP call failed\n");
984263bc
MD
1604#endif
1605 }
1606
b9a7a2bd 1607 nfs_mountopts(&nd->root_args, NULL);
984263bc 1608
b9a7a2bd 1609 nfs_mountopts(&nd->swap_args, NULL);
984263bc
MD
1610
1611 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
1612 if (bootpc_ifctx_isresolved(ifctx) != 0)
1613 bootpc_decode_reply(nd, ifctx, gctx);
1614
1615 if (gctx->gotswappath == 0)
1616 nd->swap_nblks = 0;
1617#ifdef BOOTP_NFSROOT
1618 if (gctx->gotrootpath == 0)
1619 panic("bootpc: No root path offered");
1620#endif
1621
1622 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
7b95be2a 1623 bootpc_adjust_interface(ifctx, gctx, td);
984263bc 1624
9ba76b73 1625 soclose(ifctx->so, FNONBLOCK);
984263bc
MD
1626 }
1627
1628 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
1629 if (ifctx->gotrootpath != 0)
1630 break;
1631 if (ifctx == NULL) {
1632 for (ifctx = gctx->interfaces;
1633 ifctx != NULL;
1634 ifctx = ifctx->next)
1635 if (bootpc_ifctx_isresolved(ifctx) != 0)
1636 break;
1637 }
1638 if (ifctx == NULL)
1639 goto out;
1640
1641 if (gctx->gotrootpath != 0) {
1642
1643 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1644 nd->root_fh, &nd->root_fhsize,
7b95be2a 1645 &nd->root_args, td);
984263bc
MD
1646 if (error != 0)
1647 panic("nfs_boot: mountd root, error=%d", error);
1648
1649 if (gctx->gotswappath != 0) {
1650
1651 error = md_mount(&nd->swap_saddr,
1652 nd->swap_hostnam,
1653 nd->swap_fh, &nd->swap_fhsize,
7b95be2a 1654 &nd->swap_args, td);
984263bc
MD
1655 if (error != 0)
1656 panic("nfs_boot: mountd swap, error=%d",
1657 error);
1658
1659 error = md_lookup_swap(&nd->swap_saddr,
1660 gctx->lookup_path,
1661 nd->swap_fh, &nd->swap_fhsize,
7b95be2a 1662 &nd->swap_args, td);
984263bc
MD
1663 if (error != 0)
1664 panic("nfs_boot: lookup swap, error=%d",
1665 error);
1666 }
1667 nfs_diskless_valid = 3;
1668 }
1669
1670 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1671 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1672 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1673 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1674 ifctx->myaddr.sin_addr.s_addr |
1675 ~ ifctx->netmask.sin_addr.s_addr;
1676 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1677
1678out:
1679 for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = nctx) {
1680 nctx = ifctx->next;
efda3bd0 1681 kfree(ifctx, M_TEMP);
984263bc 1682 }
efda3bd0 1683 kfree(gctx, M_TEMP);
984263bc
MD
1684}
1685