2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1995 Gordon Ross, Adam Glass
5 * Copyright (c) 1992 Regents of the University of California.
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Lawrence Berkeley Laboratory and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
45 #define IN_HISTORICAL_NETS /* include class masks */
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
50 #include "opt_bootp.h"
52 #include "opt_rootdevname.h"
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/endian.h>
58 #include <sys/kernel.h>
59 #include <sys/sockio.h>
60 #include <sys/malloc.h>
61 #include <sys/mount.h>
64 #include <sys/reboot.h>
65 #include <sys/socket.h>
66 #include <sys/socketvar.h>
67 #include <sys/sysctl.h>
71 #include <net/if_var.h>
72 #include <net/route.h>
73 #include <net/route/route_ctl.h>
75 #include <netinet/in.h>
76 #include <netinet/in_var.h>
77 #include <net/if_types.h>
78 #include <net/if_dl.h>
81 #include <nfs/nfsproto.h>
82 #include <nfsclient/nfs.h>
83 #include <nfs/nfsdiskless.h>
85 #include <nfs/xdr_subs.h>
87 #define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
89 #ifndef BOOTP_SETTLE_DELAY
90 #define BOOTP_SETTLE_DELAY 3
94 * Wait 10 seconds for interface appearance
95 * USB ethernet adapters might require some time to pop up
97 #ifndef BOOTP_IFACE_WAIT_TIMEOUT
98 #define BOOTP_IFACE_WAIT_TIMEOUT 10
102 * What is the longest we will wait before re-sending a request?
103 * Note this is also the frequency of "RPC timeout" messages.
104 * The re-send loop count sup linearly to this maximum, so the
105 * first complaint will happen after (1+2+3+4+5)=15 seconds.
107 #define MAX_RESEND_DELAY 5 /* seconds */
109 /* Definitions from RFC951 */
110 struct bootp_packet {
118 struct in_addr ciaddr;
119 struct in_addr yiaddr;
120 struct in_addr siaddr;
121 struct in_addr giaddr;
122 unsigned char chaddr[16];
125 unsigned char vend[1222];
128 struct bootpc_ifcontext {
129 STAILQ_ENTRY(bootpc_ifcontext) next;
130 struct bootp_packet call;
131 struct bootp_packet reply;
136 struct in_aliasreq _in_alias_req;
138 #define ireq _req._ifreq
139 #define iareq _req._in_alias_req
141 struct sockaddr_dl *sdl;
142 struct sockaddr_in myaddr;
143 struct sockaddr_in netmask;
144 struct sockaddr_in gw;
160 int dhcpquerytype; /* dhcp type sent */
161 struct in_addr dhcpserver;
166 #define TAG_MAXLEN 1024
167 struct bootpc_tagcontext {
168 char buf[TAG_MAXLEN + 1];
176 struct bootpc_globalcontext {
177 STAILQ_HEAD(, bootpc_ifcontext) interfaces;
179 int any_root_overrides;
185 struct bootp_packet reply;
187 struct bootpc_ifcontext *setrootfs;
188 struct bootpc_ifcontext *sethostname;
189 struct bootpc_tagcontext tmptag;
190 struct bootpc_tagcontext tag;
193 #define IPPORT_BOOTPC 68
194 #define IPPORT_BOOTPS 67
196 #define BOOTP_REQUEST 1
197 #define BOOTP_REPLY 2
200 #define TAG_PAD 0 /* Pad option, implicit length 1 */
201 #define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */
202 #define TAG_ROUTERS 3 /* Routers (in order of preference) */
203 #define TAG_HOSTNAME 12 /* Client host name */
204 #define TAG_ROOT 17 /* Root path */
205 #define TAG_INTF_MTU 26 /* Interface MTU Size (RFC2132) */
207 /* DHCP specific tags */
208 #define TAG_OVERLOAD 52 /* Option Overload */
209 #define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */
211 #define TAG_END 255 /* End Option (i.e. no more options) */
213 /* Overload values */
214 #define OVERLOAD_FILE 1
215 #define OVERLOAD_SNAME 2
217 /* Site specific tags: */
218 #define TAG_ROOTOPTS 130
219 #define TAG_COOKIE 134 /* ascii info for userland, via sysctl */
221 #define TAG_DHCP_MSGTYPE 53
222 #define TAG_DHCP_REQ_ADDR 50
223 #define TAG_DHCP_SERVERID 54
224 #define TAG_DHCP_LEASETIME 51
226 #define TAG_VENDOR_INDENTIFIER 60
229 #define DHCP_DISCOVER 1
231 #define DHCP_REQUEST 3
234 /* NFS read/write block size */
235 #ifndef BOOTP_BLOCKSIZE
236 #define BOOTP_BLOCKSIZE 8192
239 static char bootp_cookie[128];
240 static struct socket *bootp_so;
241 SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
242 bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
245 static int md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp,
246 int *fhsizep, struct nfs_args *args, struct thread *td);
247 static int setfs(struct sockaddr_in *addr, char *path, char *p,
248 const struct in_addr *siaddr);
249 static int getdec(char **ptr);
250 static int getip(char **ptr, struct in_addr *ip);
251 static void mountopts(struct nfs_args *args, char *p);
252 static int xdr_opaque_decode(struct mbuf **ptr, u_char *buf, int len);
253 static int xdr_int_decode(struct mbuf **ptr, int *iptr);
254 static void print_in_addr(struct in_addr addr);
255 static void print_sin_addr(struct sockaddr_in *addr);
256 static void clear_sinaddr(struct sockaddr_in *sin);
257 static void allocifctx(struct bootpc_globalcontext *gctx);
258 static void bootpc_compose_query(struct bootpc_ifcontext *ifctx,
260 static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
261 struct bootp_packet *bp, int len, int tag);
262 static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
263 unsigned char *start, int len, int tag);
266 void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
267 void bootpboot_p_iflist(void);
270 static int bootpc_call(struct bootpc_globalcontext *gctx,
273 static void bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
276 static void bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
277 struct bootpc_globalcontext *gctx, struct thread *td);
279 static void bootpc_decode_reply(struct nfsv3_diskless *nd,
280 struct bootpc_ifcontext *ifctx,
281 struct bootpc_globalcontext *gctx);
283 static int bootpc_received(struct bootpc_globalcontext *gctx,
284 struct bootpc_ifcontext *ifctx);
286 static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
287 static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
288 static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
291 * In order to have multiple active interfaces with address 0.0.0.0
292 * and be able to send data to a selected interface, we first set
293 * mask to /8 on all interfaces, and temporarily set it to /0 when
299 bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
302 printf("%s flags %x, addr ",
303 ifp->if_xname, ifp->if_flags);
304 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
305 printf(", broadcast ");
306 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
307 printf(", netmask ");
308 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
313 bootpboot_p_iflist(void)
318 printf("Interface list:\n");
320 for (ifp = CK_STAILQ_FIRST(&V_ifnet);
322 ifp = CK_STAILQ_NEXT(ifp, if_link)) {
323 for (ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
325 ifa = CK_STAILQ_NEXT(ifa, ifa_link))
326 if (ifa->ifa_addr->sa_family == AF_INET)
327 bootpboot_p_if(ifp, ifa);
331 #endif /* defined(BOOTP_DEBUG) */
334 clear_sinaddr(struct sockaddr_in *sin)
337 bzero(sin, sizeof(*sin));
338 sin->sin_len = sizeof(*sin);
339 sin->sin_family = AF_INET;
340 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
345 allocifctx(struct bootpc_globalcontext *gctx)
347 struct bootpc_ifcontext *ifctx;
349 ifctx = malloc(sizeof(*ifctx), M_TEMP, M_WAITOK | M_ZERO);
350 ifctx->xid = gctx->xid;
352 ifctx->state = IF_BOOTP_UNRESOLVED;
354 ifctx->state = IF_DHCP_UNRESOLVED;
357 STAILQ_INSERT_TAIL(&gctx->interfaces, ifctx, next);
361 bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
364 if (ifctx->state == IF_BOOTP_RESOLVED ||
365 ifctx->state == IF_DHCP_RESOLVED)
371 bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
374 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
375 ifctx->state == IF_DHCP_UNRESOLVED)
381 bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
384 if (ifctx->state == IF_BOOTP_FAILED ||
385 ifctx->state == IF_DHCP_FAILED)
391 bootpc_received(struct bootpc_globalcontext *gctx,
392 struct bootpc_ifcontext *ifctx)
394 unsigned char dhcpreplytype;
398 * Need timeout for fallback to less
399 * desirable alternative.
402 /* This call used for the side effect (badopt flag) */
403 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
407 /* If packet is invalid, ignore it */
408 if (gctx->tmptag.badopt != 0)
411 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
412 gctx->replylen, TAG_DHCP_MSGTYPE);
416 dhcpreplytype = DHCP_NOMSG;
418 switch (ifctx->dhcpquerytype) {
420 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
421 #ifndef BOOTP_FORCE_DHCP
422 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
428 if (dhcpreplytype != DHCP_ACK)
434 /* Ignore packet unless it gives us a root tag we didn't have */
436 if ((ifctx->state == IF_BOOTP_RESOLVED ||
437 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
438 (ifctx->state == IF_DHCP_OFFERED ||
439 ifctx->state == IF_DHCP_RESOLVED))) &&
440 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
443 bootpc_tag(&gctx->tmptag, &gctx->reply,
448 bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
449 ifctx->replylen = gctx->replylen;
451 /* XXX: Only reset if 'perfect' response */
452 if (ifctx->state == IF_BOOTP_UNRESOLVED)
453 ifctx->state = IF_BOOTP_RESOLVED;
454 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
455 ifctx->dhcpquerytype == DHCP_DISCOVER) {
456 if (dhcpreplytype == DHCP_OFFER)
457 ifctx->state = IF_DHCP_OFFERED;
459 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
460 } else if (ifctx->state == IF_DHCP_OFFERED &&
461 ifctx->dhcpquerytype == DHCP_REQUEST)
462 ifctx->state = IF_DHCP_RESOLVED;
464 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
465 ifctx->state != IF_BOOTP_RESOLVED) {
466 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
467 ifctx->replylen, TAG_DHCP_SERVERID);
468 if (p != NULL && gctx->tmptag.taglen == 4) {
469 memcpy(&ifctx->dhcpserver, p, 4);
470 ifctx->gotdhcpserver = 1;
472 ifctx->gotdhcpserver = 0;
476 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
479 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
481 TAG_ROUTERS) != NULL);
482 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
484 TAG_SUBNETMASK) != NULL);
489 bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
491 struct sockaddr_in *sin, dst;
495 int error, on, rcvflg, timo, len;
499 struct bootpc_ifcontext *ifctx;
507 bzero(&sopt, sizeof(sopt));
508 sopt.sopt_dir = SOPT_SET;
509 sopt.sopt_level = SOL_SOCKET;
510 sopt.sopt_name = SO_RCVTIMEO;
512 sopt.sopt_valsize = sizeof tv;
514 error = sosetopt(bootp_so, &sopt);
522 sopt.sopt_name = SO_BROADCAST;
524 sopt.sopt_valsize = sizeof on;
526 error = sosetopt(bootp_so, &sopt);
535 sopt.sopt_name = SO_DONTROUTE;
537 sopt.sopt_valsize = sizeof on;
539 error = sosetopt(bootp_so, &sopt);
544 * Bind the local endpoint to a bootp client port.
548 sin->sin_port = htons(IPPORT_BOOTPC);
549 error = sobind(bootp_so, (struct sockaddr *)sin, td);
551 printf("bind failed\n");
556 * Setup socket address for the server.
560 sin->sin_addr.s_addr = INADDR_BROADCAST;
561 sin->sin_port = htons(IPPORT_BOOTPS);
564 * Send it, repeatedly, until a reply is received,
565 * but delay each re-send by an increasing amount.
566 * If the delay hits the maximum, start complaining.
574 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
575 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
576 bootpc_tag(&gctx->tmptag, &ifctx->reply,
582 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
583 struct in_aliasreq *ifra = &ifctx->iareq;
584 sin = (struct sockaddr_in *)&ifra->ifra_mask;
586 ifctx->outstanding = 0;
587 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
591 if (bootpc_ifctx_isfailed(ifctx) != 0)
595 ifctx->outstanding = 1;
597 /* Proceed to next step in DHCP negotiation */
598 if ((ifctx->state == IF_DHCP_OFFERED &&
599 ifctx->dhcpquerytype != DHCP_REQUEST) ||
600 (ifctx->state == IF_DHCP_UNRESOLVED &&
601 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
602 (ifctx->state == IF_BOOTP_UNRESOLVED &&
603 ifctx->dhcpquerytype != DHCP_NOMSG)) {
605 bootpc_compose_query(ifctx, td);
608 /* Send BOOTP request (or re-send). */
610 if (ifctx->sentmsg == 0) {
611 switch(ifctx->dhcpquerytype) {
623 printf("Sending %s packet from "
624 "interface %s (%*D)\n",
626 ifctx->ireq.ifr_name,
627 ifctx->sdl->sdl_alen,
628 (unsigned char *) LLADDR(ifctx->sdl),
633 aio.iov_base = (caddr_t) &ifctx->call;
634 aio.iov_len = sizeof(ifctx->call);
638 auio.uio_segflg = UIO_SYSSPACE;
639 auio.uio_rw = UIO_WRITE;
641 auio.uio_resid = sizeof(ifctx->call);
644 /* Set netmask to 0.0.0.0 */
646 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
649 panic("%s: SIOCAIFADDR, error=%d", __func__,
652 error = sosend(bootp_so, (struct sockaddr *) &dst,
653 &auio, NULL, NULL, 0, td);
655 printf("%s: sosend: %d state %08x\n", __func__,
656 error, (int )bootp_so->so_state);
658 /* Set netmask to 255.0.0.0 */
659 sin->sin_addr.s_addr = htonl(0xff000000);
660 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
663 panic("%s: SIOCAIFADDR, error=%d", __func__,
667 if (outstanding == 0 &&
668 (rtimo == 0 || time_second >= rtimo)) {
673 /* Determine new timeout. */
674 if (timo < MAX_RESEND_DELAY)
677 printf("DHCP/BOOTP timeout for server ");
678 print_sin_addr(&dst);
683 * Wait for up to timo seconds for a reply.
684 * The socket receive timeout was set to 1 second.
686 atimo = timo + time_second;
687 while (time_second < atimo) {
688 aio.iov_base = (caddr_t) &gctx->reply;
689 aio.iov_len = sizeof(gctx->reply);
693 auio.uio_segflg = UIO_SYSSPACE;
694 auio.uio_rw = UIO_READ;
696 auio.uio_resid = sizeof(gctx->reply);
700 error = soreceive(bootp_so, NULL, &auio,
701 NULL, NULL, &rcvflg);
702 gctx->secs = time_second - gctx->starttime;
703 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
704 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
705 bootpc_ifctx_isfailed(ifctx) != 0)
708 ifctx->call.secs = htons(gctx->secs);
710 if (error == EWOULDBLOCK)
714 len = sizeof(gctx->reply) - auio.uio_resid;
716 /* Do we have the required number of bytes ? */
717 if (len < BOOTP_MIN_LEN)
719 gctx->replylen = len;
722 if (gctx->reply.op != BOOTP_REPLY)
725 /* Is this an answer to our query */
726 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
727 if (gctx->reply.xid != ifctx->call.xid)
730 /* Same HW address size ? */
731 if (gctx->reply.hlen != ifctx->call.hlen)
734 /* Correct HW address ? */
735 if (bcmp(gctx->reply.chaddr,
737 ifctx->call.hlen) != 0)
744 s = bootpc_tag(&gctx->tmptag,
757 s = "DHCP (unexpected)";
763 printf("Received %s packet"
766 ifctx->ireq.ifr_name);
767 print_in_addr(gctx->reply.siaddr);
768 if (gctx->reply.giaddr.s_addr !=
771 print_in_addr(gctx->reply.giaddr);
773 if (bootpc_received(gctx, ifctx) != 0) {
774 printf(" (accepted)");
775 if (ifctx->outstanding) {
776 ifctx->outstanding = 0;
779 /* Network settle delay */
780 if (outstanding == 0)
781 atimo = time_second +
784 printf(" (ignored)");
785 if (ifctx->gotrootpath ||
786 gctx->any_root_overrides) {
788 rtimo = time_second +
790 if (ifctx->gotrootpath)
791 printf(" (got root path)");
797 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
800 /* Force a retry if halfway in DHCP negotiation */
802 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
803 if (ifctx->state == IF_DHCP_OFFERED) {
804 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
807 ifctx->state = IF_DHCP_UNRESOLVED;
813 if (gotrootpath != 0) {
814 gctx->gotrootpath = gotrootpath;
815 if (rtimo != 0 && time_second >= rtimo)
818 } /* forever send/receive */
821 * XXX: These are errors of varying seriousness being silently
825 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
826 if (bootpc_ifctx_isresolved(ifctx) == 0) {
827 printf("%s timeout for interface %s\n",
828 ifctx->dhcpquerytype != DHCP_NOMSG ?
830 ifctx->ireq.ifr_name);
833 if (gctx->gotrootpath != 0) {
835 printf("Got a root path, ignoring remaining timeout\n");
840 #ifndef BOOTP_NFSROOT
841 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
842 if (bootpc_ifctx_isresolved(ifctx) != 0) {
854 bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
857 struct in_aliasreq *ifra;
858 struct sockaddr_in *sin;
862 ifra = &ifctx->iareq;
865 * Bring up the interface.
867 * Get the old interface flags and or IFF_UP into them; if
868 * IFF_UP set blindly, interface selection can be clobbered.
870 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
872 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
873 ifr->ifr_flags |= IFF_UP;
874 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
876 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
879 * Do enough of ifconfig(8) so that the chosen interface
880 * can talk to the servers. Set address to 0.0.0.0/8 and
881 * broadcast address to local broadcast.
883 sin = (struct sockaddr_in *)&ifra->ifra_addr;
885 sin = (struct sockaddr_in *)&ifra->ifra_mask;
887 sin->sin_addr.s_addr = htonl(0xff000000);
888 sin = (struct sockaddr_in *)&ifra->ifra_broadaddr;
890 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
891 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
893 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
897 bootpc_shutdown_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
900 struct sockaddr_in *sin;
905 printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
906 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
908 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
909 ifr->ifr_flags &= ~IFF_UP;
910 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
912 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
914 sin = (struct sockaddr_in *) &ifr->ifr_addr;
916 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
918 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
922 bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
923 struct bootpc_globalcontext *gctx, struct thread *td)
926 struct sockaddr_in *sin;
928 struct in_aliasreq *ifra;
929 struct sockaddr_in *myaddr;
930 struct sockaddr_in *netmask;
933 ifra = &ifctx->iareq;
934 myaddr = &ifctx->myaddr;
935 netmask = &ifctx->netmask;
937 if (bootpc_ifctx_isresolved(ifctx) == 0) {
938 /* Shutdown interfaces where BOOTP failed */
939 bootpc_shutdown_interface(ifctx, td);
943 printf("Adjusted interface %s", ifctx->ireq.ifr_name);
945 /* Do BOOTP interface options */
946 if (ifctx->mtu != 0) {
947 printf(" (MTU=%d%s)", ifctx->mtu,
948 (ifctx->mtu > 1514) ? "/JUMBO" : "");
949 ifr->ifr_mtu = ifctx->mtu;
950 error = ifioctl(bootp_so, SIOCSIFMTU, (caddr_t) ifr, td);
952 panic("%s: SIOCSIFMTU, error=%d", __func__, error);
957 * Do enough of ifconfig(8) so that the chosen interface
958 * can talk to the servers. (just set the address)
960 sin = (struct sockaddr_in *) &ifr->ifr_addr;
962 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
964 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
966 bcopy(myaddr, &ifra->ifra_addr, sizeof(*myaddr));
967 bcopy(netmask, &ifra->ifra_mask, sizeof(*netmask));
968 clear_sinaddr(&ifra->ifra_broadaddr);
969 ifra->ifra_broadaddr.sin_addr.s_addr = myaddr->sin_addr.s_addr |
970 ~netmask->sin_addr.s_addr;
972 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
974 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
978 bootpc_add_default_route(struct bootpc_ifcontext *ifctx)
981 struct sockaddr_in defdst;
982 struct sockaddr_in defmask;
983 struct rt_addrinfo info;
984 struct rib_cmd_info rc;
986 if (ifctx->gw.sin_addr.s_addr == htonl(INADDR_ANY))
989 clear_sinaddr(&defdst);
990 clear_sinaddr(&defmask);
992 bzero((caddr_t)&info, sizeof(info));
993 info.rti_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
994 info.rti_info[RTAX_DST] = (struct sockaddr *)&defdst;
995 info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&defmask;
996 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ifctx->gw;
998 error = rib_action(RT_DEFAULT_FIB, RTM_ADD, &info, &rc);
1001 printf("%s: RTM_ADD, error=%d\n", __func__, error);
1006 bootpc_remove_default_route(struct bootpc_ifcontext *ifctx)
1009 struct sockaddr_in defdst;
1010 struct sockaddr_in defmask;
1011 struct rt_addrinfo info;
1012 struct rib_cmd_info rc;
1014 if (ifctx->gw.sin_addr.s_addr == htonl(INADDR_ANY))
1017 clear_sinaddr(&defdst);
1018 clear_sinaddr(&defmask);
1020 bzero((caddr_t)&info, sizeof(info));
1021 info.rti_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
1022 info.rti_info[RTAX_DST] = (struct sockaddr *)&defdst;
1023 info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&defmask;
1024 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ifctx->gw;
1026 error = rib_action(RT_DEFAULT_FIB, RTM_DELETE, &info, &rc);
1028 printf("%s: RTM_DELETE, error=%d\n", __func__, error);
1033 setfs(struct sockaddr_in *addr, char *path, char *p,
1034 const struct in_addr *siaddr)
1037 if (getip(&p, &addr->sin_addr) == 0) {
1038 if (siaddr != NULL && *p == '/')
1039 bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
1048 addr->sin_len = sizeof(struct sockaddr_in);
1049 addr->sin_family = AF_INET;
1051 strlcpy(path, p, MNAMELEN);
1056 getip(char **ptr, struct in_addr *addr)
1064 if (((val = getdec(&p)) < 0) || (val > 255))
1070 if (((val = getdec(&p)) < 0) || (val > 255))
1076 if (((val = getdec(&p)) < 0) || (val > 255))
1082 if (((val = getdec(&p)) < 0) || (val > 255))
1086 addr->s_addr = htonl(ip);
1099 if ((*p < '0') || (*p > '9'))
1101 while ((*p >= '0') && (*p <= '9')) {
1102 ret = ret * 10 + (*p - '0');
1110 mountopts(struct nfs_args *args, char *p)
1112 args->version = NFS_ARGSVERSION;
1113 args->rsize = BOOTP_BLOCKSIZE;
1114 args->wsize = BOOTP_BLOCKSIZE;
1115 args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
1116 args->sotype = SOCK_DGRAM;
1118 nfs_parse_options(p, args);
1122 xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
1128 alignedlen = ( len + 3 ) & ~3;
1130 if (m->m_len < alignedlen) {
1131 m = m_pullup(m, alignedlen);
1137 bcopy(mtod(m, u_char *), buf, len);
1138 m_adj(m, alignedlen);
1144 xdr_int_decode(struct mbuf **mptr, int *iptr)
1148 if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
1150 *iptr = fxdr_unsigned(u_int32_t, i);
1155 print_sin_addr(struct sockaddr_in *sin)
1158 print_in_addr(sin->sin_addr);
1162 print_in_addr(struct in_addr addr)
1166 ip = ntohl(addr.s_addr);
1167 printf("%d.%d.%d.%d",
1168 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1172 bootpc_compose_query(struct bootpc_ifcontext *ifctx, struct thread *td)
1174 unsigned char *vendp;
1175 unsigned char vendor_client[64];
1177 uint8_t vendor_client_len;
1179 ifctx->gotrootpath = 0;
1181 bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
1184 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1185 ifctx->call.htype = 1; /* 10mb ethernet */
1186 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1187 ifctx->call.hops = 0;
1188 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1190 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1191 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1193 vendp = ifctx->call.vend;
1194 *vendp++ = 99; /* RFC1048 cookie */
1198 *vendp++ = TAG_MAXMSGSIZE;
1200 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1201 *vendp++ = sizeof(struct bootp_packet) & 255;
1203 snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
1204 ostype, MACHINE, osrelease);
1205 vendor_client_len = strlen(vendor_client);
1206 *vendp++ = TAG_VENDOR_INDENTIFIER;
1207 *vendp++ = vendor_client_len;
1208 memcpy(vendp, vendor_client, vendor_client_len);
1209 vendp += vendor_client_len;
1210 ifctx->dhcpquerytype = DHCP_NOMSG;
1211 switch (ifctx->state) {
1212 case IF_DHCP_UNRESOLVED:
1213 *vendp++ = TAG_DHCP_MSGTYPE;
1215 *vendp++ = DHCP_DISCOVER;
1216 ifctx->dhcpquerytype = DHCP_DISCOVER;
1217 ifctx->gotdhcpserver = 0;
1219 case IF_DHCP_OFFERED:
1220 *vendp++ = TAG_DHCP_MSGTYPE;
1222 *vendp++ = DHCP_REQUEST;
1223 ifctx->dhcpquerytype = DHCP_REQUEST;
1224 *vendp++ = TAG_DHCP_REQ_ADDR;
1226 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1228 if (ifctx->gotdhcpserver != 0) {
1229 *vendp++ = TAG_DHCP_SERVERID;
1231 memcpy(vendp, &ifctx->dhcpserver, 4);
1234 *vendp++ = TAG_DHCP_LEASETIME;
1236 leasetime = htonl(300);
1237 memcpy(vendp, &leasetime, 4);
1245 ifctx->call.secs = 0;
1246 ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
1250 bootpc_hascookie(struct bootp_packet *bp)
1253 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1254 bp->vend[2] == 83 && bp->vend[3] == 99);
1258 bootpc_tag_helper(struct bootpc_tagcontext *tctx,
1259 unsigned char *start, int len, int tag)
1265 if (tctx->badtag != 0 || tctx->badopt != 0)
1273 if (code == TAG_PAD)
1275 if (code == TAG_END)
1277 if (j >= ej || j + *j + 1 > ej) {
1283 if (tctx->taglen + len > TAG_MAXLEN) {
1289 memcpy(tctx->buf + tctx->taglen,
1291 tctx->taglen += len;
1293 if (code == TAG_OVERLOAD)
1294 tctx->overload = *j;
1300 static unsigned char *
1301 bootpc_tag(struct bootpc_tagcontext *tctx,
1302 struct bootp_packet *bp, int len, int tag)
1310 if (bootpc_hascookie(bp) == 0)
1313 bootpc_tag_helper(tctx, &bp->vend[4],
1314 (unsigned char *) bp + len - &bp->vend[4], tag);
1316 if ((tctx->overload & OVERLOAD_FILE) != 0)
1317 bootpc_tag_helper(tctx,
1318 (unsigned char *) bp->file,
1321 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1322 bootpc_tag_helper(tctx,
1323 (unsigned char *) bp->sname,
1327 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1329 tctx->buf[tctx->taglen] = '\0';
1334 bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1335 struct bootpc_globalcontext *gctx)
1341 ifctx->gotnetmask = 0;
1343 clear_sinaddr(&ifctx->myaddr);
1344 clear_sinaddr(&ifctx->netmask);
1345 clear_sinaddr(&ifctx->gw);
1347 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1349 ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
1351 printf("%s at ", ifctx->ireq.ifr_name);
1352 print_sin_addr(&ifctx->myaddr);
1354 print_in_addr(ifctx->reply.siaddr);
1356 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1357 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
1358 printf(" via gateway ");
1359 print_in_addr(ifctx->reply.giaddr);
1362 /* This call used for the side effect (overload flag) */
1363 (void) bootpc_tag(&gctx->tmptag,
1364 &ifctx->reply, ifctx->replylen, TAG_END);
1366 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1367 if (ifctx->reply.sname[0] != '\0')
1368 printf(" server name %s", ifctx->reply.sname);
1369 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1370 if (ifctx->reply.file[0] != '\0')
1371 printf(" boot file %s", ifctx->reply.file);
1375 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1378 if (gctx->tag.taglen != 4)
1379 panic("bootpc: subnet mask len is %d",
1381 bcopy(p, &ifctx->netmask.sin_addr, 4);
1382 ifctx->gotnetmask = 1;
1383 printf("subnet mask ");
1384 print_sin_addr(&ifctx->netmask);
1388 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1392 if (gctx->tag.taglen % 4)
1393 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1394 if (gctx->tag.taglen > 0) {
1395 bcopy(p, &ifctx->gw.sin_addr, 4);
1397 print_sin_addr(&ifctx->gw);
1405 * Choose a root filesystem. If a value is forced in the environment
1406 * and it contains "nfs:", use it unconditionally. Otherwise, if the
1407 * kernel is compiled with the ROOTDEVNAME option, then use it if:
1408 * - The server doesn't provide a pathname.
1409 * - The boothowto flags include RB_DFLTROOT (user said to override
1410 * the server value).
1413 if ((s = kern_getenv("vfs.root.mountfrom")) != NULL) {
1414 if ((p = strstr(s, "nfs:")) != NULL)
1415 p = strdup(p + 4, M_TEMP);
1419 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1422 ifctx->gotrootpath = 1;
1425 if ((p == NULL || (boothowto & RB_DFLTROOT) != 0) &&
1426 (p = strstr(ROOTDEVNAME, "nfs:")) != NULL) {
1431 if (gctx->setrootfs != NULL) {
1432 printf("rootfs %s (ignored) ", p);
1433 } else if (setfs(&nd->root_saddr,
1434 nd->root_hostnam, p, &ifctx->reply.siaddr)) {
1436 printf("root_server ");
1437 print_sin_addr(&nd->root_saddr);
1440 printf("rootfs %s ", p);
1441 gctx->gotrootpath = 1;
1442 gctx->setrootfs = ifctx;
1444 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1448 mountopts(&nd->root_args, p);
1449 printf("rootopts %s ", p);
1452 panic("Failed to set rootfs to %s", p);
1455 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1458 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1459 panic("bootpc: hostname >= %d bytes",
1461 if (gctx->sethostname != NULL) {
1462 printf("hostname %s (ignored) ", p);
1464 strcpy(nd->my_hostnam, p);
1465 mtx_lock(&prison0.pr_mtx);
1466 strcpy(prison0.pr_hostname, p);
1467 mtx_unlock(&prison0.pr_mtx);
1468 printf("hostname %s ", p);
1469 gctx->sethostname = ifctx;
1472 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1474 if (p != NULL) { /* store in a sysctl variable */
1475 int i, l = sizeof(bootp_cookie) - 1;
1476 for (i = 0; i < l && p[i] != '\0'; i++)
1477 bootp_cookie[i] = p[i];
1481 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1484 ifctx->mtu = be16dec(p);
1489 if (ifctx->gotnetmask == 0) {
1491 * If there is no netmask, use historical default,
1492 * but we really need the right mask from the server.
1494 printf("%s: no netmask received!\n", ifctx->ireq.ifr_name);
1495 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1496 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1497 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1498 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1500 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1507 struct bootpc_ifcontext *ifctx; /* Interface BOOTP contexts */
1508 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1510 struct sockaddr_dl *sdl;
1513 #ifndef BOOTP_WIRED_TO
1516 struct nfsv3_diskless *nd;
1521 timeout = BOOTP_IFACE_WAIT_TIMEOUT * hz;
1524 nd = &nfsv3_diskless;
1528 * If already filled in, don't touch it here
1530 if (nfs_diskless_valid != 0)
1533 gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
1534 STAILQ_INIT(&gctx->interfaces);
1535 gctx->xid = ~0xFFFF;
1536 gctx->starttime = time_second;
1539 * If ROOTDEVNAME is defined or vfs.root.mountfrom is set then we have
1540 * root-path overrides that can potentially let us boot even if we don't
1541 * get a root path from the server, so we can treat that as a non-error.
1544 gctx->any_root_overrides = 1;
1546 gctx->any_root_overrides = testenv("vfs.root.mountfrom");
1550 * Find a network interface.
1552 CURVNET_SET(TD_TO_VNET(td));
1553 #ifdef BOOTP_WIRED_TO
1554 printf("%s: wired to interface '%s'\n", __func__,
1555 __XSTRING(BOOTP_WIRED_TO));
1559 * Preallocate interface context storage, if another interface
1560 * attaches and wins the race, it won't be eligible for bootp.
1564 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1565 if ((ifp->if_flags &
1566 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1569 switch (ifp->if_alloctype) {
1579 panic("%s: no eligible interfaces", __func__);
1580 for (; ifcnt > 0; ifcnt--)
1585 ifctx = STAILQ_FIRST(&gctx->interfaces);
1587 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1590 #ifdef BOOTP_WIRED_TO
1591 if (strcmp(ifp->if_xname, __XSTRING(BOOTP_WIRED_TO)) != 0)
1594 if ((ifp->if_flags &
1595 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1598 switch (ifp->if_alloctype) {
1605 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1606 sizeof(ifctx->ireq.ifr_name));
1609 /* Get HW address */
1611 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1612 if (ifa->ifa_addr->sa_family == AF_LINK) {
1613 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1614 if (sdl->sdl_type == IFT_ETHER)
1618 panic("bootpc: Unable to find HW address for %s",
1619 ifctx->ireq.ifr_name);
1622 ifctx = STAILQ_NEXT(ifctx, next);
1627 if (STAILQ_EMPTY(&gctx->interfaces) ||
1628 STAILQ_FIRST(&gctx->interfaces)->ifp == NULL) {
1630 pause("bootpc", delay);
1634 #ifdef BOOTP_WIRED_TO
1635 panic("%s: Could not find interface specified "
1636 "by BOOTP_WIRED_TO: "
1637 __XSTRING(BOOTP_WIRED_TO), __func__);
1639 panic("%s: no suitable interface", __func__);
1643 error = socreate(AF_INET, &bootp_so, SOCK_DGRAM, 0, td->td_ucred, td);
1645 panic("%s: socreate, error=%d", __func__, error);
1647 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1648 bootpc_fakeup_interface(ifctx, td);
1650 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1651 bootpc_compose_query(ifctx, td);
1653 error = bootpc_call(gctx, td);
1655 printf("BOOTP call failed\n");
1658 mountopts(&nd->root_args, NULL);
1660 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1661 if (bootpc_ifctx_isresolved(ifctx) != 0)
1662 bootpc_decode_reply(nd, ifctx, gctx);
1664 #ifdef BOOTP_NFSROOT
1665 if (gctx->gotrootpath == 0 && gctx->any_root_overrides == 0)
1666 panic("bootpc: No root path offered");
1669 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1670 bootpc_adjust_interface(ifctx, gctx, td);
1674 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1675 if (ifctx->gotrootpath != 0)
1677 if (ifctx == NULL) {
1678 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1679 if (bootpc_ifctx_isresolved(ifctx) != 0)
1685 if (gctx->gotrootpath != 0) {
1686 struct epoch_tracker et;
1688 kern_setenv("boot.netif.name", ifctx->ifp->if_xname);
1690 NET_EPOCH_ENTER(et);
1691 bootpc_add_default_route(ifctx);
1693 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1694 nd->root_fh, &nd->root_fhsize,
1695 &nd->root_args, td);
1696 NET_EPOCH_ENTER(et);
1697 bootpc_remove_default_route(ifctx);
1700 if (gctx->any_root_overrides == 0)
1701 panic("nfs_boot: mount root, error=%d", error);
1705 rootdevnames[0] = "nfs:";
1706 nfs_diskless_valid = 3;
1709 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1710 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1711 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1712 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1713 ifctx->myaddr.sin_addr.s_addr |
1714 ~ ifctx->netmask.sin_addr.s_addr;
1715 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1716 bcopy(&ifctx->gw, &nd->mygateway, sizeof(ifctx->gw));
1719 while((ifctx = STAILQ_FIRST(&gctx->interfaces)) != NULL) {
1720 STAILQ_REMOVE_HEAD(&gctx->interfaces, next);
1721 free(ifctx, M_TEMP);
1728 * Given a server pathname, get an NFS file handle.
1729 * Also, sets sin->sin_port to the NFS service port.
1732 md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
1733 struct nfs_args *args, struct thread *td)
1741 #define RPCPROG_MNT 100005
1742 #define RPCMNT_VER1 1
1743 #define RPCMNT_VER3 3
1744 #define RPCMNT_MOUNT 1
1745 #define AUTH_SYS 1 /* unix style (uid, gids) */
1746 #define AUTH_UNIX AUTH_SYS
1748 /* XXX honor v2/v3 flags in args->flags? */
1750 /* First try NFS v3 */
1751 /* Get port number for MOUNTD. */
1752 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1753 &mdsin->sin_port, td);
1755 m = xdr_string_encode(path, strlen(path));
1757 /* Do RPC to mountd. */
1758 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1759 RPCMNT_MOUNT, &m, NULL, td);
1762 args->flags |= NFSMNT_NFSV3;
1765 /* Fallback to NFS v2 */
1767 /* Get port number for MOUNTD. */
1768 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1769 &mdsin->sin_port, td);
1773 m = xdr_string_encode(path, strlen(path));
1775 /* Do RPC to mountd. */
1776 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1777 RPCMNT_MOUNT, &m, NULL, td);
1779 return error; /* message already freed */
1785 if (xdr_int_decode(&m, &error) != 0 || error != 0)
1788 if ((args->flags & NFSMNT_NFSV3) != 0) {
1789 if (xdr_int_decode(&m, fhsizep) != 0 ||
1790 *fhsizep > NFSX_V3FHMAX ||
1794 *fhsizep = NFSX_V2FH;
1796 if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
1799 if (args->flags & NFSMNT_NFSV3) {
1800 if (xdr_int_decode(&m, &authcount) != 0)
1803 if (authcount < 0 || authcount > 100)
1805 while (authcount > 0) {
1806 if (xdr_int_decode(&m, &authver) != 0)
1808 if (authver == AUTH_UNIX)
1812 if (authunixok == 0)
1816 /* Set port number for NFS use. */
1817 error = krpc_portmap(mdsin, NFS_PROG,
1819 NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
1820 &mdsin->sin_port, td);
1832 SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);