1 /* $NetBSD: bootp_subr.c,v 1.3 2016/12/13 22:52:46 pgoyette Exp $ */
2 /*-
3 * Copyright (c) 1995 Gordon Ross, Adam Glass
4 * Copyright (c) 1992 Regents of the University of California.
5 * All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Lawrence Berkeley Laboratory and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * based on:
40 * nfs/krpc_subr.c
41 * NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp
42 */
43
44 #include <sys/cdefs.h>
45 /* __FBSDID("FreeBSD: head/sys/nfs/bootp_subr.c 297326 2016-03-27 23:16:37Z ian "); */
46 __RCSID("$NetBSD: bootp_subr.c,v 1.3 2016/12/13 22:52:46 pgoyette Exp $");
47
48 #ifdef _KERNEL_OPT
49 #include "opt_newnfs.h"
50 #endif
51
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/endian.h>
55 #include <sys/kernel.h>
56 #include <sys/sockio.h>
57 #include <sys/malloc.h>
58 #include <sys/mount.h>
59 #include <sys/mbuf.h>
60 #include <sys/proc.h>
61 #include <sys/reboot.h>
62 #include <sys/socket.h>
63 #include <sys/socketvar.h>
64 #include <sys/sysctl.h>
65 #include <sys/uio.h>
66 #include <sys/kauth.h>
67 #include <sys/lwp.h>
68 #include <sys/vnode.h>
69 #include <sys/mutex.h>
70
71 #if 0
72 #include <src/include/rpc/auth.h>
73 #endif
74
75 #include <net/if.h>
76 #include <net/route.h>
77 #ifdef BOOTP_DEBUG
78 #include <net/route_var.h>
79 #endif
80
81 #include <netinet/in.h>
82 #include <netinet/in_var.h>
83 #include <net/if_types.h>
84 #include <net/if_dl.h>
85
86 #include <fs/nfs/common/nfsproto.h>
87 #include <fs/nfs/common/nfsport.h>
88 #include <fs/nfs/common/nfs.h>
89 #include <fs/nfs/client/nfsmount.h>
90 #include <fs/nfs/client/nfsnode.h>
91 #include <fs/nfs/client/nfs.h>
92 #include <fs/nfs/common/nfsdiskless.h>
93 #include <fs/nfs/common/krpc.h>
94 #include <fs/nfs/common/xdr_subs.h>
95
96
97 #define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
98
99 #ifndef BOOTP_SETTLE_DELAY
100 #define BOOTP_SETTLE_DELAY 3
101 #endif
102
103 /*
104 * Wait 10 seconds for interface appearance
105 * USB ethernet adapters might require some time to pop up
106 */
107 #ifndef BOOTP_IFACE_WAIT_TIMEOUT
108 #define BOOTP_IFACE_WAIT_TIMEOUT 10
109 #endif
110
111 /*
112 * What is the longest we will wait before re-sending a request?
113 * Note this is also the frequency of "RPC timeout" messages.
114 * The re-send loop count sup linearly to this maximum, so the
115 * first complaint will happen after (1+2+3+4+5)=15 seconds.
116 */
117 #define MAX_RESEND_DELAY 5 /* seconds */
118
119 /* Definitions from RFC951 */
120 struct bootp_packet {
121 u_int8_t op;
122 u_int8_t htype;
123 u_int8_t hlen;
124 u_int8_t hops;
125 u_int32_t xid;
126 u_int16_t secs;
127 u_int16_t flags;
128 struct in_addr ciaddr;
129 struct in_addr yiaddr;
130 struct in_addr siaddr;
131 struct in_addr giaddr;
132 unsigned char chaddr[16];
133 char sname[64];
134 char file[128];
135 unsigned char vend[1222];
136 };
137
138 struct bootpc_ifcontext {
139 STAILQ_ENTRY(bootpc_ifcontext) next;
140 struct bootp_packet call;
141 struct bootp_packet reply;
142 int replylen;
143 int overload;
144 union {
145 struct ifreq _ifreq;
146 struct in_aliasreq _in_alias_req;
147 } _req;
148 #define ireq _req._ifreq
149 #define iareq _req._in_alias_req
150 struct ifnet *ifp;
151 struct sockaddr_dl *sdl;
152 struct sockaddr_in myaddr;
153 struct sockaddr_in netmask;
154 struct sockaddr_in gw;
155 int gotgw;
156 int gotnetmask;
157 int gotrootpath;
158 int outstanding;
159 int sentmsg;
160 u_int32_t xid;
161 enum {
162 IF_BOOTP_UNRESOLVED,
163 IF_BOOTP_RESOLVED,
164 IF_BOOTP_FAILED,
165 IF_DHCP_UNRESOLVED,
166 IF_DHCP_OFFERED,
167 IF_DHCP_RESOLVED,
168 IF_DHCP_FAILED,
169 } state;
170 int dhcpquerytype; /* dhcp type sent */
171 struct in_addr dhcpserver;
172 int gotdhcpserver;
173 uint16_t mtu;
174 };
175
176 #define TAG_MAXLEN 1024
177 struct bootpc_tagcontext {
178 char buf[TAG_MAXLEN + 1];
179 int overload;
180 int badopt;
181 int badtag;
182 int foundopt;
183 int taglen;
184 };
185
186 struct bootpc_globalcontext {
187 STAILQ_HEAD(, bootpc_ifcontext) interfaces;
188 u_int32_t xid;
189 int any_root_overrides;
190 int gotrootpath;
191 int gotgw;
192 int ifnum;
193 int secs;
194 int starttime;
195 struct bootp_packet reply;
196 int replylen;
197 struct bootpc_ifcontext *setrootfs;
198 struct bootpc_ifcontext *sethostname;
199 struct bootpc_tagcontext tmptag;
200 struct bootpc_tagcontext tag;
201 };
202
203 #define IPPORT_BOOTPC 68
204 #define IPPORT_BOOTPS 67
205
206 #define BOOTP_REQUEST 1
207 #define BOOTP_REPLY 2
208
209 /* Common tags */
210 #define TAG_PAD 0 /* Pad option, implicit length 1 */
211 #define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */
212 #define TAG_ROUTERS 3 /* Routers (in order of preference) */
213 #define TAG_HOSTNAME 12 /* Client host name */
214 #define TAG_ROOT 17 /* Root path */
215 #define TAG_INTF_MTU 26 /* Interface MTU Size (RFC2132) */
216
217 /* DHCP specific tags */
218 #define TAG_OVERLOAD 52 /* Option Overload */
219 #define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */
220
221 #define TAG_END 255 /* End Option (i.e. no more options) */
222
223 /* Overload values */
224 #define OVERLOAD_FILE 1
225 #define OVERLOAD_SNAME 2
226
227 /* Site specific tags: */
228 #define TAG_ROOTOPTS 130
229 #define TAG_COOKIE 134 /* ascii info for userland, via sysctl */
230
231 #define TAG_DHCP_MSGTYPE 53
232 #define TAG_DHCP_REQ_ADDR 50
233 #define TAG_DHCP_SERVERID 54
234 #define TAG_DHCP_LEASETIME 51
235
236 #define TAG_VENDOR_INDENTIFIER 60
237
238 #define DHCP_NOMSG 0
239 #define DHCP_DISCOVER 1
240 #define DHCP_OFFER 2
241 #define DHCP_REQUEST 3
242 #define DHCP_ACK 5
243
244 /* NFS read/write block size */
245 #ifndef BOOTP_BLOCKSIZE
246 #define BOOTP_BLOCKSIZE 8192
247 #endif
248
249 static char bootp_cookie[128];
250 static struct socket *bootp_so;
251
252 #if 0 /* Need to init sysctl variables in the module initialization code */
253 SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
254 bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
255 #endif
256
257 /* mountd RPC */
258 static int md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp,
259 int *fhsizep, struct nfs_args *args, struct lwp *td);
260 static int setmyfs(struct sockaddr_in *addr, char *path, char *p,
261 const struct in_addr *siaddr);
262 static int getdec(char **ptr);
263 static int getip(char **ptr, struct in_addr *ip);
264 static void mountopts(struct nfs_args *args, char *p);
265 static int xdr_opaque_decode(struct mbuf **ptr, u_char *buf, int len);
266 static int xdr_int_decode(struct mbuf **ptr, int *iptr);
267 static void print_in_addr(struct in_addr addr);
268 static void print_sin_addr(struct sockaddr_in *addr);
269 static void clear_sinaddr(struct sockaddr_in *sin);
270 static void allocifctx(struct bootpc_globalcontext *gctx);
271 static void bootpc_compose_query(struct bootpc_ifcontext *ifctx,
272 struct lwp *td);
273 static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
274 struct bootp_packet *bp, int len, int tag);
275 static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
276 unsigned char *start, int len, int tag);
277
278 #ifdef BOOTP_DEBUG
279 void bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma);
280 void bootpboot_p_rtentry(struct rtentry *rt);
281 void bootpboot_p_tree(struct radix_node *rn);
282 void bootpboot_p_rtlist(void);
283 void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
284 void bootpboot_p_iflist(void);
285 #endif
286
287 static int bootpc_call(struct bootpc_globalcontext *gctx,
288 struct lwp *td);
289
290 static void bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
291 struct lwp *td);
292
293 static void bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
294 struct bootpc_globalcontext *gctx, struct lwp *td);
295
296 static void bootpc_decode_reply(struct nfsv3_diskless *nd,
297 struct bootpc_ifcontext *ifctx,
298 struct bootpc_globalcontext *gctx);
299
300 static int bootpc_received(struct bootpc_globalcontext *gctx,
301 struct bootpc_ifcontext *ifctx);
302
303 static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
304 static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
305 static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
306
307 /*
308 * In order to have multiple active interfaces with address 0.0.0.0
309 * and be able to send data to a selected interface, we first set
310 * mask to /8 on all interfaces, and temporarily set it to /0 when
311 * doing sosend().
312 */
313
314 #ifdef BOOTP_DEBUG
315 void
bootpboot_p_sa(struct sockaddr * sa,struct sockaddr * ma)316 bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma)
317 {
318
319 if (sa == NULL) {
320 printf("(sockaddr *) <null>");
321 return;
322 }
323 switch (sa->sa_family) {
324 case AF_INET:
325 {
326 struct sockaddr_in *sin;
327
328 sin = (struct sockaddr_in *) sa;
329 printf("inet ");
330 print_sin_addr(sin);
331 if (ma != NULL) {
332 sin = (struct sockaddr_in *) ma;
333 printf(" mask ");
334 print_sin_addr(sin);
335 }
336 }
337 break;
338 case AF_LINK:
339 {
340 struct sockaddr_dl *sli;
341 int i;
342
343 sli = (struct sockaddr_dl *) sa;
344 printf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
345 for (i = 0; i < sli->sdl_alen; i++) {
346 if (i > 0)
347 printf(":");
348 printf("%x", ((unsigned char *) LLADDR(sli))[i]);
349 }
350 }
351 break;
352 default:
353 printf("af%d", sa->sa_family);
354 }
355 }
356
357 void
bootpboot_p_rtentry(struct rtentry * rt)358 bootpboot_p_rtentry(struct rtentry *rt)
359 {
360
361 bootpboot_p_sa(rt_key(rt), rt_mask(rt));
362 printf(" ");
363 bootpboot_p_sa(rt->rt_gateway, NULL);
364 printf(" ");
365 printf("flags %x", (unsigned short) rt->rt_flags);
366 printf(" %d", (int) rt->rt_expire);
367 printf(" %s\n", rt->rt_ifp->if_xname);
368 }
369
370 void
bootpboot_p_tree(struct radix_node * rn)371 bootpboot_p_tree(struct radix_node *rn)
372 {
373
374 while (rn != NULL) {
375 if (rn->rn_bit < 0) {
376 if ((rn->rn_flags & RNF_ROOT) != 0) {
377 } else {
378 bootpboot_p_rtentry((struct rtentry *) rn);
379 }
380 rn = rn->rn_dupedkey;
381 } else {
382 bootpboot_p_tree(rn->rn_left);
383 bootpboot_p_tree(rn->rn_right);
384 return;
385 }
386 }
387 }
388
389 void
bootpboot_p_rtlist(void)390 bootpboot_p_rtlist(void)
391 {
392 struct rib_head *rnh;
393
394 printf("Routing table:\n");
395 rnh = rt_tables_get_rnh(0, AF_INET);
396 if (rnh == NULL)
397 return;
398 RIB_RLOCK(rnh); /* could sleep XXX */
399 bootpboot_p_tree(rnh->rnh_treetop);
400 RIB_RUNLOCK(rnh);
401 }
402
403 void
bootpboot_p_if(struct ifnet * ifp,struct ifaddr * ifa)404 bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
405 {
406
407 printf("%s flags %x, addr ",
408 ifp->if_xname, ifp->if_flags);
409 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
410 printf(", broadcast ");
411 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
412 printf(", netmask ");
413 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
414 printf("\n");
415 }
416
417 void
bootpboot_p_iflist(void)418 bootpboot_p_iflist(void)
419 {
420 struct ifnet *ifp;
421 struct ifaddr *ifa;
422
423 printf("Interface list:\n");
424 IFNET_RLOCK();
425 for (ifp = TAILQ_FIRST(&V_ifnet);
426 ifp != NULL;
427 ifp = TAILQ_NEXT(ifp, if_link)) {
428 for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
429 ifa != NULL;
430 ifa = TAILQ_NEXT(ifa, ifa_link))
431 if (ifa->ifa_addr->sa_family == AF_INET)
432 bootpboot_p_if(ifp, ifa);
433 }
434 IFNET_RUNLOCK();
435 }
436 #endif /* defined(BOOTP_DEBUG) */
437
438 static void
clear_sinaddr(struct sockaddr_in * sin)439 clear_sinaddr(struct sockaddr_in *sin)
440 {
441
442 bzero(sin, sizeof(*sin));
443 sin->sin_len = sizeof(*sin);
444 sin->sin_family = AF_INET;
445 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
446 sin->sin_port = 0;
447 }
448
449 static void
allocifctx(struct bootpc_globalcontext * gctx)450 allocifctx(struct bootpc_globalcontext *gctx)
451 {
452 struct bootpc_ifcontext *ifctx;
453
454 ifctx = malloc(sizeof(*ifctx), M_TEMP, M_WAITOK | M_ZERO);
455 ifctx->xid = gctx->xid;
456 #ifdef BOOTP_NO_DHCP
457 ifctx->state = IF_BOOTP_UNRESOLVED;
458 #else
459 ifctx->state = IF_DHCP_UNRESOLVED;
460 #endif
461 gctx->xid += 0x100;
462 STAILQ_INSERT_TAIL(&gctx->interfaces, ifctx, next);
463 }
464
465 static __inline int
bootpc_ifctx_isresolved(struct bootpc_ifcontext * ifctx)466 bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
467 {
468
469 if (ifctx->state == IF_BOOTP_RESOLVED ||
470 ifctx->state == IF_DHCP_RESOLVED)
471 return 1;
472 return 0;
473 }
474
475 static __inline int
bootpc_ifctx_isunresolved(struct bootpc_ifcontext * ifctx)476 bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
477 {
478
479 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
480 ifctx->state == IF_DHCP_UNRESOLVED)
481 return 1;
482 return 0;
483 }
484
485 static __inline int
bootpc_ifctx_isfailed(struct bootpc_ifcontext * ifctx)486 bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
487 {
488
489 if (ifctx->state == IF_BOOTP_FAILED ||
490 ifctx->state == IF_DHCP_FAILED)
491 return 1;
492 return 0;
493 }
494
495 static int
bootpc_received(struct bootpc_globalcontext * gctx,struct bootpc_ifcontext * ifctx)496 bootpc_received(struct bootpc_globalcontext *gctx,
497 struct bootpc_ifcontext *ifctx)
498 {
499 unsigned char dhcpreplytype;
500 char *p;
501
502 /*
503 * Need timeout for fallback to less
504 * desirable alternative.
505 */
506
507 /* This call used for the side effect (badopt flag) */
508 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
509 gctx->replylen,
510 TAG_END);
511
512 /* If packet is invalid, ignore it */
513 if (gctx->tmptag.badopt != 0)
514 return 0;
515
516 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
517 gctx->replylen, TAG_DHCP_MSGTYPE);
518 if (p != NULL)
519 dhcpreplytype = *p;
520 else
521 dhcpreplytype = DHCP_NOMSG;
522
523 switch (ifctx->dhcpquerytype) {
524 case DHCP_DISCOVER:
525 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
526 #ifndef BOOTP_FORCE_DHCP
527 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
528 #endif
529 )
530 return 0;
531 break;
532 case DHCP_REQUEST:
533 if (dhcpreplytype != DHCP_ACK)
534 return 0;
535 case DHCP_NOMSG:
536 break;
537 }
538
539 /* Ignore packet unless it gives us a root tag we didn't have */
540
541 if ((ifctx->state == IF_BOOTP_RESOLVED ||
542 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
543 (ifctx->state == IF_DHCP_OFFERED ||
544 ifctx->state == IF_DHCP_RESOLVED))) &&
545 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
546 ifctx->replylen,
547 TAG_ROOT) != NULL ||
548 bootpc_tag(&gctx->tmptag, &gctx->reply,
549 gctx->replylen,
550 TAG_ROOT) == NULL))
551 return 0;
552
553 bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
554 ifctx->replylen = gctx->replylen;
555
556 /* XXX: Only reset if 'perfect' response */
557 if (ifctx->state == IF_BOOTP_UNRESOLVED)
558 ifctx->state = IF_BOOTP_RESOLVED;
559 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
560 ifctx->dhcpquerytype == DHCP_DISCOVER) {
561 if (dhcpreplytype == DHCP_OFFER)
562 ifctx->state = IF_DHCP_OFFERED;
563 else
564 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
565 } else if (ifctx->state == IF_DHCP_OFFERED &&
566 ifctx->dhcpquerytype == DHCP_REQUEST)
567 ifctx->state = IF_DHCP_RESOLVED;
568
569
570 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
571 ifctx->state != IF_BOOTP_RESOLVED) {
572 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
573 ifctx->replylen, TAG_DHCP_SERVERID);
574 if (p != NULL && gctx->tmptag.taglen == 4) {
575 memcpy(&ifctx->dhcpserver, p, 4);
576 ifctx->gotdhcpserver = 1;
577 } else
578 ifctx->gotdhcpserver = 0;
579 return 1;
580 }
581
582 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
583 ifctx->replylen,
584 TAG_ROOT) != NULL);
585 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
586 ifctx->replylen,
587 TAG_ROUTERS) != NULL);
588 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
589 ifctx->replylen,
590 TAG_SUBNETMASK) != NULL);
591 return 1;
592 }
593
594 static int
bootpc_call(struct bootpc_globalcontext * gctx,struct lwp * td)595 bootpc_call(struct bootpc_globalcontext *gctx, struct lwp *td)
596 {
597 struct sockaddr_in *sin, dst;
598 struct uio auio;
599 struct sockopt sopt;
600 struct iovec aio;
601 int error, on, rcvflg, timo, len;
602 time_t atimo;
603 time_t rtimo;
604 struct timeval tv;
605 struct bootpc_ifcontext *ifctx;
606 int outstanding;
607 int gotrootpath;
608 int retry;
609 const char *s;
610
611 tv.tv_sec = 1;
612 tv.tv_usec = 0;
613 sockopt_init(&sopt, SOL_SOCKET, SO_RCVTIMEO, sizeof(tv));
614 error = sockopt_set(&sopt, &tv, sizeof(tv));
615 sockopt_destroy(&sopt);
616
617 if (error != 0)
618 goto out;
619
620 /*
621 * Enable broadcast.
622 */
623 on = 1;
624 sockopt_init(&sopt, SOL_SOCKET, SO_BROADCAST, sizeof(on));
625 error = sockopt_set(&sopt, &on, sizeof(on));
626 sockopt_destroy(&sopt);
627
628 if (error != 0)
629 goto out;
630
631 /*
632 * Disable routing.
633 */
634
635 on = 1;
636 sockopt_init(&sopt, SOL_SOCKET, SO_DONTROUTE, sizeof(on));
637 error = sockopt_set(&sopt, &on, sizeof(on));
638 sockopt_destroy(&sopt);
639
640 if (error != 0)
641 goto out;
642
643 /*
644 * Bind the local endpoint to a bootp client port.
645 */
646 sin = &dst;
647 clear_sinaddr(sin);
648 sin->sin_port = htons(IPPORT_BOOTPC);
649 error = sobind(bootp_so, (struct sockaddr *)sin, td);
650 if (error != 0) {
651 printf("bind failed\n");
652 goto out;
653 }
654
655 /*
656 * Setup socket address for the server.
657 */
658 sin = &dst;
659 clear_sinaddr(sin);
660 sin->sin_addr.s_addr = INADDR_BROADCAST;
661 sin->sin_port = htons(IPPORT_BOOTPS);
662
663 /*
664 * Send it, repeatedly, until a reply is received,
665 * but delay each re-send by an increasing amount.
666 * If the delay hits the maximum, start complaining.
667 */
668 timo = 0;
669 rtimo = 0;
670 for (;;) {
671
672 outstanding = 0;
673 gotrootpath = 0;
674
675 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
676 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
677 bootpc_tag(&gctx->tmptag, &ifctx->reply,
678 ifctx->replylen,
679 TAG_ROOT) != NULL)
680 gotrootpath = 1;
681 }
682
683 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
684 struct in_aliasreq *ifra = &ifctx->iareq;
685 sin = (struct sockaddr_in *)&ifra->ifra_mask;
686
687 ifctx->outstanding = 0;
688 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
689 gotrootpath != 0) {
690 continue;
691 }
692 if (bootpc_ifctx_isfailed(ifctx) != 0)
693 continue;
694
695 outstanding++;
696 ifctx->outstanding = 1;
697
698 /* Proceed to next step in DHCP negotiation */
699 if ((ifctx->state == IF_DHCP_OFFERED &&
700 ifctx->dhcpquerytype != DHCP_REQUEST) ||
701 (ifctx->state == IF_DHCP_UNRESOLVED &&
702 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
703 (ifctx->state == IF_BOOTP_UNRESOLVED &&
704 ifctx->dhcpquerytype != DHCP_NOMSG)) {
705 ifctx->sentmsg = 0;
706 bootpc_compose_query(ifctx, td);
707 }
708
709 /* Send BOOTP request (or re-send). */
710
711 if (ifctx->sentmsg == 0) {
712 switch(ifctx->dhcpquerytype) {
713 case DHCP_DISCOVER:
714 s = "DHCP Discover";
715 break;
716 case DHCP_REQUEST:
717 s = "DHCP Request";
718 break;
719 case DHCP_NOMSG:
720 default:
721 s = "BOOTP Query";
722 break;
723 }
724 printf("Sending %s packet from "
725 "interface %s (%*ld):\n",
726 s,
727 ifctx->ireq.ifr_name,
728 ifctx->sdl->sdl_alen,
729 (unsigned char *) LLADDR(ifctx->sdl) );
730 ifctx->sentmsg = 1;
731 }
732
733 aio.iov_base = (void *) &ifctx->call;
734 aio.iov_len = sizeof(ifctx->call);
735
736 auio.uio_iov = &aio;
737 auio.uio_iovcnt = 1;
738 auio.uio_segflg = UIO_SYSSPACE;
739 auio.uio_rw = UIO_WRITE;
740 auio.uio_offset = 0;
741 auio.uio_resid = sizeof(ifctx->call);
742 auio.uio_td = td;
743
744 /* Set netmask to 0.0.0.0 */
745 clear_sinaddr(sin);
746 error = ifioctl(bootp_so, SIOCAIFADDR, (void *)ifra,
747 td);
748 if (error != 0)
749 panic("%s: SIOCAIFADDR, error=%d", __func__,
750 error);
751
752 error = sosend(bootp_so, (struct sockaddr *) &dst,
753 &auio, NULL, NULL, 0, td);
754 if (error != 0)
755 printf("%s: sosend: %d state %08x\n", __func__,
756 error, (int )bootp_so->so_state);
757
758 /* Set netmask to 255.0.0.0 */
759 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
760 error = ifioctl(bootp_so, SIOCAIFADDR, (void *)ifra,
761 td);
762 if (error != 0)
763 panic("%s: SIOCAIFADDR, error=%d", __func__,
764 error);
765 }
766
767 if (outstanding == 0 &&
768 (rtimo == 0 || time_second >= rtimo)) {
769 error = 0;
770 goto out;
771 }
772
773 /* Determine new timeout. */
774 if (timo < MAX_RESEND_DELAY)
775 timo++;
776 else {
777 printf("DHCP/BOOTP timeout for server ");
778 print_sin_addr(&dst);
779 printf("\n");
780 }
781
782 /*
783 * Wait for up to timo seconds for a reply.
784 * The socket receive timeout was set to 1 second.
785 */
786 atimo = timo + time_second;
787 while (time_second < atimo) {
788 aio.iov_base = (void *) &gctx->reply;
789 aio.iov_len = sizeof(gctx->reply);
790
791 auio.uio_iov = &aio;
792 auio.uio_iovcnt = 1;
793 auio.uio_segflg = UIO_SYSSPACE;
794 auio.uio_rw = UIO_READ;
795 auio.uio_offset = 0;
796 auio.uio_resid = sizeof(gctx->reply);
797 auio.uio_td = td;
798
799 rcvflg = 0;
800 error = soreceive(bootp_so, NULL, &auio,
801 NULL, NULL, &rcvflg);
802 gctx->secs = time_second - gctx->starttime;
803 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
804 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
805 bootpc_ifctx_isfailed(ifctx) != 0)
806 continue;
807
808 ifctx->call.secs = htons(gctx->secs);
809 }
810 if (error == EWOULDBLOCK)
811 continue;
812 if (error != 0)
813 goto out;
814 len = sizeof(gctx->reply) - auio.uio_resid;
815
816 /* Do we have the required number of bytes ? */
817 if (len < BOOTP_MIN_LEN)
818 continue;
819 gctx->replylen = len;
820
821 /* Is it a reply? */
822 if (gctx->reply.op != BOOTP_REPLY)
823 continue;
824
825 /* Is this an answer to our query */
826 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
827 if (gctx->reply.xid != ifctx->call.xid)
828 continue;
829
830 /* Same HW address size ? */
831 if (gctx->reply.hlen != ifctx->call.hlen)
832 continue;
833
834 /* Correct HW address ? */
835 if (bcmp(gctx->reply.chaddr,
836 ifctx->call.chaddr,
837 ifctx->call.hlen) != 0)
838 continue;
839
840 break;
841 }
842
843 if (ifctx != NULL) {
844 s = bootpc_tag(&gctx->tmptag,
845 &gctx->reply,
846 gctx->replylen,
847 TAG_DHCP_MSGTYPE);
848 if (s != NULL) {
849 switch (*s) {
850 case DHCP_OFFER:
851 s = "DHCP Offer";
852 break;
853 case DHCP_ACK:
854 s = "DHCP Ack";
855 break;
856 default:
857 s = "DHCP (unexpected)";
858 break;
859 }
860 } else
861 s = "BOOTP Reply";
862
863 printf("Received %s packet"
864 " on %s from ",
865 s,
866 ifctx->ireq.ifr_name);
867 print_in_addr(gctx->reply.siaddr);
868 if (gctx->reply.giaddr.s_addr !=
869 htonl(INADDR_ANY)) {
870 printf(" via ");
871 print_in_addr(gctx->reply.giaddr);
872 }
873 if (bootpc_received(gctx, ifctx) != 0) {
874 printf(" (accepted)");
875 if (ifctx->outstanding) {
876 ifctx->outstanding = 0;
877 outstanding--;
878 }
879 /* Network settle delay */
880 if (outstanding == 0)
881 atimo = time_second +
882 BOOTP_SETTLE_DELAY;
883 } else
884 printf(" (ignored)");
885 if (ifctx->gotrootpath ||
886 gctx->any_root_overrides) {
887 gotrootpath = 1;
888 rtimo = time_second +
889 BOOTP_SETTLE_DELAY;
890 if (ifctx->gotrootpath)
891 printf(" (got root path)");
892 }
893 printf("\n");
894 }
895 } /* while secs */
896 #ifdef BOOTP_TIMEOUT
897 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
898 break;
899 #endif
900 /* Force a retry if halfway in DHCP negotiation */
901 retry = 0;
902 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
903 if (ifctx->state == IF_DHCP_OFFERED) {
904 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
905 retry = 1;
906 else
907 ifctx->state = IF_DHCP_UNRESOLVED;
908 }
909
910 if (retry != 0)
911 continue;
912
913 if (gotrootpath != 0) {
914 gctx->gotrootpath = gotrootpath;
915 if (rtimo != 0 && time_second >= rtimo)
916 break;
917 }
918 } /* forever send/receive */
919
920 /*
921 * XXX: These are errors of varying seriousness being silently
922 * ignored
923 */
924
925 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
926 if (bootpc_ifctx_isresolved(ifctx) == 0) {
927 printf("%s timeout for interface %s\n",
928 ifctx->dhcpquerytype != DHCP_NOMSG ?
929 "DHCP" : "BOOTP",
930 ifctx->ireq.ifr_name);
931 }
932
933 if (gctx->gotrootpath != 0) {
934 #if 0
935 printf("Got a root path, ignoring remaining timeout\n");
936 #endif
937 error = 0;
938 goto out;
939 }
940 #ifndef BOOTP_NFSROOT
941 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
942 if (bootpc_ifctx_isresolved(ifctx) != 0) {
943 error = 0;
944 goto out;
945 }
946 #endif
947 error = ETIMEDOUT;
948
949 out:
950 return (error);
951 }
952
953 static void
bootpc_fakeup_interface(struct bootpc_ifcontext * ifctx,struct lwp * td)954 bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, struct lwp *td)
955 {
956 struct ifreq *ifr;
957 struct in_aliasreq *ifra;
958 struct sockaddr_in *sin;
959 int error;
960
961 ifr = &ifctx->ireq;
962 ifra = &ifctx->iareq;
963
964 /*
965 * Bring up the interface.
966 *
967 * Get the old interface flags and or IFF_UP into them; if
968 * IFF_UP set blindly, interface selection can be clobbered.
969 */
970 error = ifioctl(bootp_so, SIOCGIFFLAGS, (void *)ifr, td);
971 if (error != 0)
972 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
973 ifr->ifr_flags |= IFF_UP;
974 error = ifioctl(bootp_so, SIOCSIFFLAGS, (void *)ifr, td);
975 if (error != 0)
976 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
977
978 /*
979 * Do enough of ifconfig(8) so that the chosen interface
980 * can talk to the servers. Set address to 0.0.0.0/8 and
981 * broadcast address to local broadcast.
982 */
983 sin = (struct sockaddr_in *)&ifra->ifra_addr;
984 clear_sinaddr(sin);
985 sin = (struct sockaddr_in *)&ifra->ifra_mask;
986 clear_sinaddr(sin);
987 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
988 sin = (struct sockaddr_in *)&ifra->ifra_broadaddr;
989 clear_sinaddr(sin);
990 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
991 error = ifioctl(bootp_so, SIOCAIFADDR, (void *)ifra, td);
992 if (error != 0)
993 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
994 }
995
996 static void
bootpc_shutdown_interface(struct bootpc_ifcontext * ifctx,struct lwp * td)997 bootpc_shutdown_interface(struct bootpc_ifcontext *ifctx, struct lwp *td)
998 {
999 struct ifreq *ifr;
1000 struct sockaddr_in *sin;
1001 int error;
1002
1003 ifr = &ifctx->ireq;
1004
1005 printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
1006 error = ifioctl(bootp_so, SIOCGIFFLAGS, (void *)ifr, td);
1007 if (error != 0)
1008 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
1009 ifr->ifr_flags &= ~IFF_UP;
1010 error = ifioctl(bootp_so, SIOCSIFFLAGS, (void *)ifr, td);
1011 if (error != 0)
1012 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
1013
1014 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1015 clear_sinaddr(sin);
1016 error = ifioctl(bootp_so, SIOCDIFADDR, (void *) ifr, td);
1017 if (error != 0)
1018 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1019 }
1020
1021 static void
bootpc_adjust_interface(struct bootpc_ifcontext * ifctx,struct bootpc_globalcontext * gctx,struct lwp * td)1022 bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
1023 struct bootpc_globalcontext *gctx, struct lwp *td)
1024 {
1025 int error;
1026 struct sockaddr_in *sin;
1027 struct ifreq *ifr;
1028 struct in_aliasreq *ifra;
1029 struct sockaddr_in *myaddr;
1030 struct sockaddr_in *netmask;
1031
1032 ifr = &ifctx->ireq;
1033 ifra = &ifctx->iareq;
1034 myaddr = &ifctx->myaddr;
1035 netmask = &ifctx->netmask;
1036
1037 if (bootpc_ifctx_isresolved(ifctx) == 0) {
1038 /* Shutdown interfaces where BOOTP failed */
1039 bootpc_shutdown_interface(ifctx, td);
1040 return;
1041 }
1042
1043 printf("Adjusted interface %s", ifctx->ireq.ifr_name);
1044
1045 /* Do BOOTP interface options */
1046 if (ifctx->mtu != 0) {
1047 printf(" (MTU=%d%s)", ifctx->mtu,
1048 (ifctx->mtu > 1514) ? "/JUMBO" : "");
1049 ifr->ifr_mtu = ifctx->mtu;
1050 error = ifioctl(bootp_so, SIOCSIFMTU, (void *) ifr, td);
1051 if (error != 0)
1052 panic("%s: SIOCSIFMTU, error=%d", __func__, error);
1053 }
1054 printf("\n");
1055
1056 /*
1057 * Do enough of ifconfig(8) so that the chosen interface
1058 * can talk to the servers. (just set the address)
1059 */
1060 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1061 clear_sinaddr(sin);
1062 error = ifioctl(bootp_so, SIOCDIFADDR, (void *) ifr, td);
1063 if (error != 0)
1064 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1065
1066 bcopy(myaddr, &ifra->ifra_addr, sizeof(*myaddr));
1067 bcopy(netmask, &ifra->ifra_mask, sizeof(*netmask));
1068 clear_sinaddr(&ifra->ifra_broadaddr);
1069 ifra->ifra_broadaddr.sin_addr.s_addr = myaddr->sin_addr.s_addr |
1070 ~netmask->sin_addr.s_addr;
1071
1072 error = ifioctl(bootp_so, SIOCAIFADDR, (void *)ifra, td);
1073 if (error != 0)
1074 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
1075 }
1076
1077 static void
bootpc_add_default_route(struct bootpc_ifcontext * ifctx)1078 bootpc_add_default_route(struct bootpc_ifcontext *ifctx)
1079 {
1080 int error;
1081 struct sockaddr_in defdst;
1082 struct sockaddr_in defmask;
1083
1084 if (ifctx->gw.sin_addr.s_addr == htonl(INADDR_ANY))
1085 return;
1086
1087 clear_sinaddr(&defdst);
1088 clear_sinaddr(&defmask);
1089
1090 error = rtrequest_fib(RTM_ADD, (struct sockaddr *)&defdst,
1091 (struct sockaddr *) &ifctx->gw, (struct sockaddr *)&defmask,
1092 (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, RT_DEFAULT_FIB);
1093 if (error != 0) {
1094 printf("%s: RTM_ADD, error=%d\n", __func__, error);
1095 }
1096 }
1097
1098 static void
bootpc_remove_default_route(struct bootpc_ifcontext * ifctx)1099 bootpc_remove_default_route(struct bootpc_ifcontext *ifctx)
1100 {
1101 int error;
1102 struct sockaddr_in defdst;
1103 struct sockaddr_in defmask;
1104
1105 if (ifctx->gw.sin_addr.s_addr == htonl(INADDR_ANY))
1106 return;
1107
1108 clear_sinaddr(&defdst);
1109 clear_sinaddr(&defmask);
1110
1111 error = rtrequest_fib(RTM_DELETE, (struct sockaddr *)&defdst,
1112 (struct sockaddr *) &ifctx->gw, (struct sockaddr *)&defmask,
1113 (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, RT_DEFAULT_FIB);
1114 if (error != 0) {
1115 printf("%s: RTM_DELETE, error=%d\n", __func__, error);
1116 }
1117 }
1118
1119 static int
setmyfs(struct sockaddr_in * addr,char * path,char * p,const struct in_addr * siaddr)1120 setmyfs(struct sockaddr_in *addr, char *path, char *p,
1121 const struct in_addr *siaddr)
1122 {
1123
1124 if (getip(&p, &addr->sin_addr) == 0) {
1125 if (siaddr != NULL && *p == '/')
1126 bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
1127 else
1128 return 0;
1129 } else {
1130 if (*p != ':')
1131 return 0;
1132 p++;
1133 }
1134
1135 addr->sin_len = sizeof(struct sockaddr_in);
1136 addr->sin_family = AF_INET;
1137
1138 strlcpy(path, p, MNAMELEN);
1139 return 1;
1140 }
1141
1142 static int
getip(char ** ptr,struct in_addr * addr)1143 getip(char **ptr, struct in_addr *addr)
1144 {
1145 char *p;
1146 unsigned int ip;
1147 int val;
1148
1149 p = *ptr;
1150 ip = 0;
1151 if (((val = getdec(&p)) < 0) || (val > 255))
1152 return 0;
1153 ip = val << 24;
1154 if (*p != '.')
1155 return 0;
1156 p++;
1157 if (((val = getdec(&p)) < 0) || (val > 255))
1158 return 0;
1159 ip |= (val << 16);
1160 if (*p != '.')
1161 return 0;
1162 p++;
1163 if (((val = getdec(&p)) < 0) || (val > 255))
1164 return 0;
1165 ip |= (val << 8);
1166 if (*p != '.')
1167 return 0;
1168 p++;
1169 if (((val = getdec(&p)) < 0) || (val > 255))
1170 return 0;
1171 ip |= val;
1172
1173 addr->s_addr = htonl(ip);
1174 *ptr = p;
1175 return 1;
1176 }
1177
1178 static int
getdec(char ** ptr)1179 getdec(char **ptr)
1180 {
1181 char *p;
1182 int ret;
1183
1184 p = *ptr;
1185 ret = 0;
1186 if ((*p < '0') || (*p > '9'))
1187 return -1;
1188 while ((*p >= '0') && (*p <= '9')) {
1189 ret = ret * 10 + (*p - '0');
1190 p++;
1191 }
1192 *ptr = p;
1193 return ret;
1194 }
1195
1196 static void
mountopts(struct nfs_args * args,char * p)1197 mountopts(struct nfs_args *args, char *p)
1198 {
1199 args->version = NFS_ARGSVERSION;
1200 args->rsize = BOOTP_BLOCKSIZE;
1201 args->wsize = BOOTP_BLOCKSIZE;
1202 args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
1203 args->sotype = SOCK_DGRAM;
1204 if (p != NULL)
1205 nfs_parse_options(p, args);
1206 }
1207
1208 static int
xdr_opaque_decode(struct mbuf ** mptr,u_char * buf,int len)1209 xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
1210 {
1211 struct mbuf *m;
1212 int alignedlen;
1213
1214 m = *mptr;
1215 alignedlen = ( len + 3 ) & ~3;
1216
1217 if (m->m_len < alignedlen) {
1218 m = m_pullup(m, alignedlen);
1219 if (m == NULL) {
1220 *mptr = NULL;
1221 return EBADRPC;
1222 }
1223 }
1224 bcopy(mtod(m, u_char *), buf, len);
1225 m_adj(m, alignedlen);
1226 *mptr = m;
1227 return 0;
1228 }
1229
1230 static int
xdr_int_decode(struct mbuf ** mptr,int * iptr)1231 xdr_int_decode(struct mbuf **mptr, int *iptr)
1232 {
1233 u_int32_t i;
1234
1235 if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
1236 return EBADRPC;
1237 *iptr = fxdr_unsigned(u_int32_t, i);
1238 return 0;
1239 }
1240
1241 static void
print_sin_addr(struct sockaddr_in * sin)1242 print_sin_addr(struct sockaddr_in *sin)
1243 {
1244
1245 print_in_addr(sin->sin_addr);
1246 }
1247
1248 static void
print_in_addr(struct in_addr addr)1249 print_in_addr(struct in_addr addr)
1250 {
1251 unsigned int ip;
1252
1253 ip = ntohl(addr.s_addr);
1254 printf("%d.%d.%d.%d",
1255 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1256 }
1257
1258 static void
bootpc_compose_query(struct bootpc_ifcontext * ifctx,struct lwp * td)1259 bootpc_compose_query(struct bootpc_ifcontext *ifctx, struct lwp *td)
1260 {
1261 unsigned char *vendp;
1262 unsigned char vendor_client[64];
1263 uint32_t leasetime;
1264 uint8_t vendor_client_len;
1265
1266 ifctx->gotrootpath = 0;
1267
1268 bzero((void *) &ifctx->call, sizeof(ifctx->call));
1269
1270 /* bootpc part */
1271 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1272 ifctx->call.htype = 1; /* 10mb ethernet */
1273 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1274 ifctx->call.hops = 0;
1275 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1276 ifctx->xid++;
1277 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1278 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1279
1280 vendp = ifctx->call.vend;
1281 *vendp++ = 99; /* RFC1048 cookie */
1282 *vendp++ = 130;
1283 *vendp++ = 83;
1284 *vendp++ = 99;
1285 *vendp++ = TAG_MAXMSGSIZE;
1286 *vendp++ = 2;
1287 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1288 *vendp++ = sizeof(struct bootp_packet) & 255;
1289
1290 snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
1291 ostype, MACHINE, osrelease);
1292 vendor_client_len = strlen(vendor_client);
1293 *vendp++ = TAG_VENDOR_INDENTIFIER;
1294 *vendp++ = vendor_client_len;
1295 memcpy(vendp, vendor_client, vendor_client_len);
1296 vendp += vendor_client_len;
1297 ifctx->dhcpquerytype = DHCP_NOMSG;
1298 switch (ifctx->state) {
1299 case IF_DHCP_UNRESOLVED:
1300 *vendp++ = TAG_DHCP_MSGTYPE;
1301 *vendp++ = 1;
1302 *vendp++ = DHCP_DISCOVER;
1303 ifctx->dhcpquerytype = DHCP_DISCOVER;
1304 ifctx->gotdhcpserver = 0;
1305 break;
1306 case IF_DHCP_OFFERED:
1307 *vendp++ = TAG_DHCP_MSGTYPE;
1308 *vendp++ = 1;
1309 *vendp++ = DHCP_REQUEST;
1310 ifctx->dhcpquerytype = DHCP_REQUEST;
1311 *vendp++ = TAG_DHCP_REQ_ADDR;
1312 *vendp++ = 4;
1313 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1314 vendp += 4;
1315 if (ifctx->gotdhcpserver != 0) {
1316 *vendp++ = TAG_DHCP_SERVERID;
1317 *vendp++ = 4;
1318 memcpy(vendp, &ifctx->dhcpserver, 4);
1319 vendp += 4;
1320 }
1321 *vendp++ = TAG_DHCP_LEASETIME;
1322 *vendp++ = 4;
1323 leasetime = htonl(300);
1324 memcpy(vendp, &leasetime, 4);
1325 vendp += 4;
1326 break;
1327 default:
1328 break;
1329 }
1330 *vendp = TAG_END;
1331
1332 ifctx->call.secs = 0;
1333 ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
1334 }
1335
1336 static int
bootpc_hascookie(struct bootp_packet * bp)1337 bootpc_hascookie(struct bootp_packet *bp)
1338 {
1339
1340 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1341 bp->vend[2] == 83 && bp->vend[3] == 99);
1342 }
1343
1344 static void
bootpc_tag_helper(struct bootpc_tagcontext * tctx,unsigned char * start,int len,int tag)1345 bootpc_tag_helper(struct bootpc_tagcontext *tctx,
1346 unsigned char *start, int len, int tag)
1347 {
1348 unsigned char *j;
1349 unsigned char *ej;
1350 unsigned char code;
1351
1352 if (tctx->badtag != 0 || tctx->badopt != 0)
1353 return;
1354
1355 j = start;
1356 ej = j + len;
1357
1358 while (j < ej) {
1359 code = *j++;
1360 if (code == TAG_PAD)
1361 continue;
1362 if (code == TAG_END)
1363 return;
1364 if (j >= ej || j + *j + 1 > ej) {
1365 tctx->badopt = 1;
1366 return;
1367 }
1368 len = *j++;
1369 if (code == tag) {
1370 if (tctx->taglen + len > TAG_MAXLEN) {
1371 tctx->badtag = 1;
1372 return;
1373 }
1374 tctx->foundopt = 1;
1375 if (len > 0)
1376 memcpy(tctx->buf + tctx->taglen,
1377 j, len);
1378 tctx->taglen += len;
1379 }
1380 if (code == TAG_OVERLOAD)
1381 tctx->overload = *j;
1382
1383 j += len;
1384 }
1385 }
1386
1387 static unsigned char *
bootpc_tag(struct bootpc_tagcontext * tctx,struct bootp_packet * bp,int len,int tag)1388 bootpc_tag(struct bootpc_tagcontext *tctx,
1389 struct bootp_packet *bp, int len, int tag)
1390 {
1391 tctx->overload = 0;
1392 tctx->badopt = 0;
1393 tctx->badtag = 0;
1394 tctx->foundopt = 0;
1395 tctx->taglen = 0;
1396
1397 if (bootpc_hascookie(bp) == 0)
1398 return NULL;
1399
1400 bootpc_tag_helper(tctx, &bp->vend[4],
1401 (unsigned char *) bp + len - &bp->vend[4], tag);
1402
1403 if ((tctx->overload & OVERLOAD_FILE) != 0)
1404 bootpc_tag_helper(tctx,
1405 (unsigned char *) bp->file,
1406 sizeof(bp->file),
1407 tag);
1408 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1409 bootpc_tag_helper(tctx,
1410 (unsigned char *) bp->sname,
1411 sizeof(bp->sname),
1412 tag);
1413
1414 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1415 return NULL;
1416 tctx->buf[tctx->taglen] = '\0';
1417 return tctx->buf;
1418 }
1419
1420 static void
bootpc_decode_reply(struct nfsv3_diskless * nd,struct bootpc_ifcontext * ifctx,struct bootpc_globalcontext * gctx)1421 bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1422 struct bootpc_globalcontext *gctx)
1423 {
1424 char *p, *s;
1425
1426 ifctx->gotgw = 0;
1427 ifctx->gotnetmask = 0;
1428
1429 clear_sinaddr(&ifctx->myaddr);
1430 clear_sinaddr(&ifctx->netmask);
1431 clear_sinaddr(&ifctx->gw);
1432
1433 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1434
1435 printf("%s at ", ifctx->ireq.ifr_name);
1436 print_sin_addr(&ifctx->myaddr);
1437 printf(" server ");
1438 print_in_addr(ifctx->reply.siaddr);
1439
1440 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1441 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
1442 printf(" via gateway ");
1443 print_in_addr(ifctx->reply.giaddr);
1444 }
1445
1446 /* This call used for the side effect (overload flag) */
1447 (void) bootpc_tag(&gctx->tmptag,
1448 &ifctx->reply, ifctx->replylen, TAG_END);
1449
1450 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1451 if (ifctx->reply.sname[0] != '\0')
1452 printf(" server name %s", ifctx->reply.sname);
1453 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1454 if (ifctx->reply.file[0] != '\0')
1455 printf(" boot file %s", ifctx->reply.file);
1456
1457 printf("\n");
1458
1459 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1460 TAG_SUBNETMASK);
1461 if (p != NULL) {
1462 if (gctx->tag.taglen != 4)
1463 panic("bootpc: subnet mask len is %d",
1464 gctx->tag.taglen);
1465 bcopy(p, &ifctx->netmask.sin_addr, 4);
1466 ifctx->gotnetmask = 1;
1467 printf("subnet mask ");
1468 print_sin_addr(&ifctx->netmask);
1469 printf(" ");
1470 }
1471
1472 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1473 TAG_ROUTERS);
1474 if (p != NULL) {
1475 /* Routers */
1476 if (gctx->tag.taglen % 4)
1477 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1478 if (gctx->tag.taglen > 0) {
1479 bcopy(p, &ifctx->gw.sin_addr, 4);
1480 printf("router ");
1481 print_sin_addr(&ifctx->gw);
1482 printf(" ");
1483 ifctx->gotgw = 1;
1484 gctx->gotgw = 1;
1485 }
1486 }
1487
1488 /*
1489 * Choose a root filesystem. If a value is forced in the environment
1490 * and it contains "nfs:", use it unconditionally. Otherwise, if the
1491 * kernel is compiled with the ROOTDEVNAME option, then use it if:
1492 * - The server doesn't provide a pathname.
1493 * - The boothowto flags include RB_DFLTROOT (user said to override
1494 * the server value).
1495 */
1496 p = NULL;
1497 if ((s = kern_getenv("vfs.root.mountfrom")) != NULL) {
1498 if ((p = strstr(s, "nfs:")) != NULL)
1499 p = strdup(p + 4, M_TEMP);
1500 freeenv(s);
1501 }
1502 if (p == NULL) {
1503 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1504 TAG_ROOT);
1505 if (p != NULL)
1506 ifctx->gotrootpath = 1;
1507 }
1508 #ifdef ROOTDEVNAME
1509 if ((p == NULL || (boothowto & RB_DFLTROOT) != 0) &&
1510 (p = strstr(ROOTDEVNAME, "nfs:")) != NULL) {
1511 p += 4;
1512 }
1513 #endif
1514 if (p != NULL) {
1515 if (gctx->setrootfs != NULL) {
1516 printf("rootfs %s (ignored) ", p);
1517 } else if (setmyfs(&nd->root_saddr,
1518 nd->root_hostnam, p, &ifctx->reply.siaddr)) {
1519 if (*p == '/') {
1520 printf("root_server ");
1521 print_sin_addr(&nd->root_saddr);
1522 printf(" ");
1523 }
1524 printf("rootfs %s ", p);
1525 gctx->gotrootpath = 1;
1526 gctx->setrootfs = ifctx;
1527
1528 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1529 ifctx->replylen,
1530 TAG_ROOTOPTS);
1531 if (p != NULL) {
1532 mountopts(&nd->root_args, p);
1533 printf("rootopts %s ", p);
1534 }
1535 } else
1536 panic("Failed to set rootfs to %s", p);
1537 }
1538
1539 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1540 TAG_HOSTNAME);
1541 if (p != NULL) {
1542 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1543 panic("bootpc: hostname >= %d bytes",
1544 MAXHOSTNAMELEN);
1545 if (gctx->sethostname != NULL) {
1546 printf("hostname %s (ignored) ", p);
1547 } else {
1548 strcpy(nd->my_hostnam, p);
1549 mutex_enter(&prison0.pr_mtx);
1550 strcpy(prison0.pr_hostname, p);
1551 mutex_exit(&prison0.pr_mtx);
1552 printf("hostname %s ", p);
1553 gctx->sethostname = ifctx;
1554 }
1555 }
1556 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1557 TAG_COOKIE);
1558 if (p != NULL) { /* store in a sysctl variable */
1559 int i, l = sizeof(bootp_cookie) - 1;
1560 for (i = 0; i < l && p[i] != '\0'; i++)
1561 bootp_cookie[i] = p[i];
1562 p[i] = '\0';
1563 }
1564
1565 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1566 TAG_INTF_MTU);
1567 if (p != NULL) {
1568 ifctx->mtu = be16dec(p);
1569 }
1570
1571 printf("\n");
1572
1573 if (ifctx->gotnetmask == 0) {
1574 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1575 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1576 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1577 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1578 else
1579 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1580 }
1581 }
1582
1583 void
bootpc_init(void)1584 bootpc_init(void)
1585 {
1586 struct bootpc_ifcontext *ifctx; /* Interface BOOTP contexts */
1587 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1588 struct ifnet *ifp;
1589 struct sockaddr_dl *sdl;
1590 struct ifaddr *ifa;
1591 int error;
1592 #ifndef BOOTP_WIRED_TO
1593 int ifcnt;
1594 #endif
1595 struct nfsv3_diskless *nd;
1596 struct lwp *td;
1597 int timeout;
1598 int delay;
1599
1600 timeout = BOOTP_IFACE_WAIT_TIMEOUT * hz;
1601 delay = hz / 10;
1602
1603 nd = &nfsv3_diskless;
1604 td = curlwp;
1605
1606 /*
1607 * If already filled in, don't touch it here
1608 */
1609 if (nfs_diskless_valid != 0)
1610 return;
1611
1612 gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
1613 STAILQ_INIT(&gctx->interfaces);
1614 gctx->xid = ~0xFFFF;
1615 gctx->starttime = time_second;
1616
1617 /*
1618 * If ROOTDEVNAME is defined or vfs.root.mountfrom is set then we have
1619 * root-path overrides that can potentially let us boot even if we don't
1620 * get a root path from the server, so we can treat that as a non-error.
1621 */
1622 #ifdef ROOTDEVNAME
1623 gctx->any_root_overrides = 1;
1624 #else
1625 gctx->any_root_overrides = testenv("vfs.root.mountfrom");
1626 #endif
1627
1628 /*
1629 * Find a network interface.
1630 */
1631 CURVNET_SET(TD_TO_VNET(td));
1632 #ifdef BOOTP_WIRED_TO
1633 printf("%s: wired to interface '%s'\n", __func__,
1634 __XSTRING(BOOTP_WIRED_TO));
1635 allocifctx(gctx);
1636 #else
1637 /*
1638 * Preallocate interface context storage, if another interface
1639 * attaches and wins the race, it won't be eligible for bootp.
1640 */
1641 ifcnt = 0;
1642 IFNET_RLOCK();
1643 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
1644 if ((ifp->if_flags &
1645 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1646 IFF_BROADCAST)
1647 continue;
1648 switch (ifp->if_type) {
1649 case IFT_ETHER:
1650 case IFT_FDDI:
1651 case IFT_ISO88025:
1652 break;
1653 default:
1654 continue;
1655 }
1656 ifcnt++;
1657 }
1658 IFNET_RUNLOCK();
1659 if (ifcnt == 0)
1660 panic("%s: no eligible interfaces", __func__);
1661 for (; ifcnt > 0; ifcnt--)
1662 allocifctx(gctx);
1663 #endif
1664
1665 retry:
1666 ifctx = STAILQ_FIRST(&gctx->interfaces);
1667 IFNET_RLOCK();
1668 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
1669 if (ifctx == NULL)
1670 break;
1671 #ifdef BOOTP_WIRED_TO
1672 if (strcmp(ifp->if_xname, __XSTRING(BOOTP_WIRED_TO)) != 0)
1673 continue;
1674 #else
1675 if ((ifp->if_flags &
1676 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1677 IFF_BROADCAST)
1678 continue;
1679 switch (ifp->if_type) {
1680 case IFT_ETHER:
1681 case IFT_FDDI:
1682 case IFT_ISO88025:
1683 break;
1684 default:
1685 continue;
1686 }
1687 #endif
1688 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1689 sizeof(ifctx->ireq.ifr_name));
1690 ifctx->ifp = ifp;
1691
1692 /* Get HW address */
1693 sdl = NULL;
1694 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
1695 if (ifa->ifa_addr->sa_family == AF_LINK) {
1696 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1697 if (sdl->sdl_type == IFT_ETHER)
1698 break;
1699 }
1700 if (sdl == NULL)
1701 panic("bootpc: Unable to find HW address for %s",
1702 ifctx->ireq.ifr_name);
1703 ifctx->sdl = sdl;
1704
1705 ifctx = STAILQ_NEXT(ifctx, next);
1706 }
1707 IFNET_RUNLOCK();
1708 CURVNET_RESTORE();
1709
1710 if (STAILQ_EMPTY(&gctx->interfaces) ||
1711 STAILQ_FIRST(&gctx->interfaces)->ifp == NULL) {
1712 if (timeout > 0) {
1713 pause("bootpc", delay);
1714 timeout -= delay;
1715 goto retry;
1716 }
1717 #ifdef BOOTP_WIRED_TO
1718 panic("%s: Could not find interface specified "
1719 "by BOOTP_WIRED_TO: "
1720 __XSTRING(BOOTP_WIRED_TO), __func__);
1721 #else
1722 panic("%s: no suitable interface", __func__);
1723 #endif
1724 }
1725
1726 error = socreate(AF_INET, &bootp_so, SOCK_DGRAM, 0, td, NULL);
1727 if (error != 0)
1728 panic("%s: socreate, error=%d", __func__, error);
1729
1730 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1731 bootpc_fakeup_interface(ifctx, td);
1732
1733 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1734 bootpc_compose_query(ifctx, td);
1735
1736 error = bootpc_call(gctx, td);
1737 if (error != 0) {
1738 printf("BOOTP call failed\n");
1739 }
1740
1741 mountopts(&nd->root_args, NULL);
1742
1743 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1744 if (bootpc_ifctx_isresolved(ifctx) != 0)
1745 bootpc_decode_reply(nd, ifctx, gctx);
1746
1747 #ifdef BOOTP_NFSROOT
1748 if (gctx->gotrootpath == 0 && gctx->any_root_overrides == 0)
1749 panic("bootpc: No root path offered");
1750 #endif
1751
1752 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1753 bootpc_adjust_interface(ifctx, gctx, td);
1754
1755 soclose(bootp_so);
1756
1757 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1758 if (ifctx->gotrootpath != 0)
1759 break;
1760 if (ifctx == NULL) {
1761 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1762 if (bootpc_ifctx_isresolved(ifctx) != 0)
1763 break;
1764 }
1765 if (ifctx == NULL)
1766 goto out;
1767
1768 if (gctx->gotrootpath != 0) {
1769
1770 kern_setenv("boot.netif.name", ifctx->ifp->if_xname);
1771
1772 bootpc_add_default_route(ifctx);
1773 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1774 nd->root_fh, &nd->root_fhsize,
1775 &nd->root_args, td);
1776 bootpc_remove_default_route(ifctx);
1777 if (error != 0) {
1778 if (gctx->any_root_overrides == 0)
1779 panic("nfs_boot: mount root, error=%d", error);
1780 else
1781 goto out;
1782 }
1783 rootdevnames[0] = "nfs:";
1784 nfs_diskless_valid = 3;
1785 }
1786
1787 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1788 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1789 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1790 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1791 ifctx->myaddr.sin_addr.s_addr |
1792 ~ ifctx->netmask.sin_addr.s_addr;
1793 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1794 bcopy(&ifctx->gw, &nd->mygateway, sizeof(ifctx->gw));
1795
1796 out:
1797 while((ifctx = STAILQ_FIRST(&gctx->interfaces)) != NULL) {
1798 STAILQ_REMOVE_HEAD(&gctx->interfaces, next);
1799 free(ifctx, M_TEMP);
1800 }
1801 free(gctx, M_TEMP);
1802 }
1803
1804 /*
1805 * RPC: mountd/mount
1806 * Given a server pathname, get an NFS file handle.
1807 * Also, sets sin->sin_port to the NFS service port.
1808 */
1809 static int
md_mount(struct sockaddr_in * mdsin,char * path,u_char * fhp,int * fhsizep,struct nfs_args * args,struct lwp * td)1810 md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
1811 struct nfs_args *args, struct lwp *td)
1812 {
1813 struct mbuf *m;
1814 int error;
1815 int authunixok;
1816 int authcount;
1817 int authver;
1818
1819 #define RPCPROG_MNT 100005
1820 #define RPCMNT_VER1 1
1821 #define RPCMNT_VER3 3
1822 #define RPCMNT_MOUNT 1
1823 #define AUTH_SYS 1 /* unix style (uid, gids) */
1824 #define AUTH_UNIX AUTH_SYS
1825
1826 /* XXX honor v2/v3 flags in args->flags? */
1827 #ifdef BOOTP_NFSV3
1828 /* First try NFS v3 */
1829 /* Get port number for MOUNTD. */
1830 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1831 &mdsin->sin_port, td);
1832 if (error == 0) {
1833 m = xdr_string_encode(path, strlen(path));
1834
1835 /* Do RPC to mountd. */
1836 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1837 RPCMNT_MOUNT, &m, NULL, td);
1838 }
1839 if (error == 0) {
1840 args->flags |= NFSMNT_NFSV3;
1841 } else {
1842 #endif
1843 /* Fallback to NFS v2 */
1844
1845 /* Get port number for MOUNTD. */
1846 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1847 &mdsin->sin_port, td);
1848 if (error != 0)
1849 return error;
1850
1851 m = xdr_string_encode(path, strlen(path));
1852
1853 /* Do RPC to mountd. */
1854 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1855 RPCMNT_MOUNT, &m, NULL, td);
1856 if (error != 0)
1857 return error; /* message already freed */
1858
1859 #ifdef BOOTP_NFSV3
1860 }
1861 #endif
1862
1863 if (xdr_int_decode(&m, &error) != 0 || error != 0)
1864 goto bad;
1865
1866 if ((args->flags & NFSMNT_NFSV3) != 0) {
1867 if (xdr_int_decode(&m, fhsizep) != 0 ||
1868 *fhsizep > NFSX_V3FHMAX ||
1869 *fhsizep <= 0)
1870 goto bad;
1871 } else
1872 *fhsizep = NFSX_V2FH;
1873
1874 if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
1875 goto bad;
1876
1877 if (args->flags & NFSMNT_NFSV3) {
1878 if (xdr_int_decode(&m, &authcount) != 0)
1879 goto bad;
1880 authunixok = 0;
1881 if (authcount < 0 || authcount > 100)
1882 goto bad;
1883 while (authcount > 0) {
1884 if (xdr_int_decode(&m, &authver) != 0)
1885 goto bad;
1886 if (authver == AUTH_UNIX)
1887 authunixok = 1;
1888 authcount--;
1889 }
1890 if (authunixok == 0)
1891 goto bad;
1892 }
1893
1894 /* Set port number for NFS use. */
1895 error = krpc_portmap(mdsin, NFS_PROG,
1896 (args->flags &
1897 NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
1898 &mdsin->sin_port, td);
1899
1900 goto out;
1901
1902 bad:
1903 error = EBADRPC;
1904
1905 out:
1906 m_freem(m);
1907 return error;
1908 }
1909
1910 #if 0 /* Need to call bootpc_init from module initialization routine */
1911 SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);
1912 #endif
1913