Fix the experimental NFS client so that it does not bogusly

set the f_flags field of "struct statfs". This had the interesting
effect of making the NFSv4 mounts "disappear" after r221014,
since NFSMNT_NFSV4 and MNT_IGNORE became the same bit.
Move the files used for a diskless NFS root from sys/nfsclient
to sys/nfs in preparation for them to be used by both NFS
clients. Also, move the declaration of the three global data
structures from sys/nfsclient/nfs_vfsops.c to sys/nfs/nfs_diskless.c
so that they are defined when either client uses them.

Reviewed by:	jhb
MFC after:	2 weeks

1 files changed, 0 insertions, 1867 deletions

diff --git a/sys/nfsclient/bootp_subr.c b/sys/nfsclient/bootp_subr.c
deleted file mode 100644
index 9fcd03f..0000000
--- a/sys/nfsclient/bootp_subr.c
+++ /dev/null
@@ -1,1867 +0,0 @@
-/*-
- * Copyright (c) 1995 Gordon Ross, Adam Glass
- * Copyright (c) 1992 Regents of the University of California.
- * All rights reserved.
- *
- * This software was developed by the Computer Systems Engineering group
- * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
- * contributed to Berkeley.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Lawrence Berkeley Laboratory and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * based on:
- *      nfs/krpc_subr.c
- *	$NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include "opt_bootp.h"
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/jail.h>
-#include <sys/kernel.h>
-#include <sys/sockio.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/mbuf.h>
-#include <sys/proc.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/sysctl.h>
-#include <sys/uio.h>
-
-#include <net/if.h>
-#include <net/route.h>
-
-#include <netinet/in.h>
-#include <net/if_types.h>
-#include <net/if_dl.h>
-#include <net/vnet.h>
-
-#include <nfs/nfsproto.h>
-#include <nfsclient/nfs.h>
-#include <nfsclient/nfsdiskless.h>
-#include <nfsclient/krpc.h>
-#include <nfs/xdr_subs.h>
-
-
-#define BOOTP_MIN_LEN		300	/* Minimum size of bootp udp packet */
-
-#ifndef BOOTP_SETTLE_DELAY
-#define BOOTP_SETTLE_DELAY 3
-#endif
-
-/*
- * What is the longest we will wait before re-sending a request?
- * Note this is also the frequency of "RPC timeout" messages.
- * The re-send loop count sup linearly to this maximum, so the
- * first complaint will happen after (1+2+3+4+5)=15 seconds.
- */
-#define	MAX_RESEND_DELAY 5	/* seconds */
-
-/* Definitions from RFC951 */
-struct bootp_packet {
-	u_int8_t op;
-	u_int8_t htype;
-	u_int8_t hlen;
-	u_int8_t hops;
-	u_int32_t xid;
-	u_int16_t secs;
-	u_int16_t flags;
-	struct in_addr ciaddr;
-	struct in_addr yiaddr;
-	struct in_addr siaddr;
-	struct in_addr giaddr;
-	unsigned char chaddr[16];
-	char sname[64];
-	char file[128];
-	unsigned char vend[1222];
-};
-
-struct bootpc_ifcontext {
-	struct bootpc_ifcontext *next;
-	struct bootp_packet call;
-	struct bootp_packet reply;
-	int replylen;
-	int overload;
-	struct socket *so;
-	struct ifreq ireq;
-	struct ifnet *ifp;
-	struct sockaddr_dl *sdl;
-	struct sockaddr_in myaddr;
-	struct sockaddr_in netmask;
-	struct sockaddr_in gw;
-	struct sockaddr_in broadcast;	/* Different for each interface */
-	int gotgw;
-	int gotnetmask;
-	int gotrootpath;
-	int outstanding;
-	int sentmsg;
-	u_int32_t xid;
-	enum {
-		IF_BOOTP_UNRESOLVED,
-		IF_BOOTP_RESOLVED,
-		IF_BOOTP_FAILED,
-		IF_DHCP_UNRESOLVED,
-		IF_DHCP_OFFERED,
-		IF_DHCP_RESOLVED,
-		IF_DHCP_FAILED,
-	} state;
-	int dhcpquerytype;		/* dhcp type sent */
-	struct in_addr dhcpserver;
-	int gotdhcpserver;
-};
-
-#define TAG_MAXLEN 1024
-struct bootpc_tagcontext {
-	char buf[TAG_MAXLEN + 1];
-	int overload;
-	int badopt;
-	int badtag;
-	int foundopt;
-	int taglen;
-};
-
-struct bootpc_globalcontext {
-	struct bootpc_ifcontext *interfaces;
-	struct bootpc_ifcontext *lastinterface;
-	u_int32_t xid;
-	int gotrootpath;
-	int gotgw;
-	int ifnum;
-	int secs;
-	int starttime;
-	struct bootp_packet reply;
-	int replylen;
-	struct bootpc_ifcontext *setrootfs;
-	struct bootpc_ifcontext *sethostname;
-	struct bootpc_tagcontext tmptag;
-	struct bootpc_tagcontext tag;
-};
-
-#define IPPORT_BOOTPC 68
-#define IPPORT_BOOTPS 67
-
-#define BOOTP_REQUEST 1
-#define BOOTP_REPLY 2
-
-/* Common tags */
-#define TAG_PAD		  0  /* Pad option, implicit length 1 */
-#define TAG_SUBNETMASK	  1  /* RFC 950 subnet mask */
-#define TAG_ROUTERS	  3  /* Routers (in order of preference) */
-#define TAG_HOSTNAME	 12  /* Client host name */
-#define TAG_ROOT	 17  /* Root path */
-
-/* DHCP specific tags */
-#define TAG_OVERLOAD	 52  /* Option Overload */
-#define TAG_MAXMSGSIZE   57  /* Maximum DHCP Message Size */
-
-#define TAG_END		255  /* End Option (i.e. no more options) */
-
-/* Overload values */
-#define OVERLOAD_FILE     1
-#define OVERLOAD_SNAME    2
-
-/* Site specific tags: */
-#define TAG_ROOTOPTS	130
-#define TAG_COOKIE	134	/* ascii info for userland, via sysctl */
-
-#define TAG_DHCP_MSGTYPE 53
-#define TAG_DHCP_REQ_ADDR 50
-#define TAG_DHCP_SERVERID 54
-#define TAG_DHCP_LEASETIME 51
-
-#define TAG_VENDOR_INDENTIFIER 60
-
-#define DHCP_NOMSG    0
-#define DHCP_DISCOVER 1
-#define DHCP_OFFER    2
-#define DHCP_REQUEST  3
-#define DHCP_ACK      5
-
-/* NFS read/write block size */
-#ifndef BOOTP_BLOCKSIZE
-#define	BOOTP_BLOCKSIZE	8192
-#endif
-
-static char bootp_cookie[128];
-SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
-	bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
-
-/* mountd RPC */
-static int	md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp,
-		    int *fhsizep, struct nfs_args *args, struct thread *td);
-static int	setfs(struct sockaddr_in *addr, char *path, char *p,
-		    const struct in_addr *siaddr);
-static int	getdec(char **ptr);
-static int	getip(char **ptr, struct in_addr *ip);
-static void	mountopts(struct nfs_args *args, char *p);
-static int	xdr_opaque_decode(struct mbuf **ptr, u_char *buf, int len);
-static int	xdr_int_decode(struct mbuf **ptr, int *iptr);
-static void	print_in_addr(struct in_addr addr);
-static void	print_sin_addr(struct sockaddr_in *addr);
-static void	clear_sinaddr(struct sockaddr_in *sin);
-static void	allocifctx(struct bootpc_globalcontext *gctx);
-static void	bootpc_compose_query(struct bootpc_ifcontext *ifctx,
-		    struct bootpc_globalcontext *gctx, struct thread *td);
-static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
-		    struct bootp_packet *bp, int len, int tag);
-static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
-		    unsigned char *start, int len, int tag);
-
-#ifdef BOOTP_DEBUG
-void bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma);
-void bootpboot_p_rtentry(struct rtentry *rt);
-void bootpboot_p_tree(struct radix_node *rn);
-void bootpboot_p_rtlist(void);
-void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
-void bootpboot_p_iflist(void);
-#endif
-
-static int	bootpc_call(struct bootpc_globalcontext *gctx,
-		    struct thread *td);
-
-static int	bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
-		    struct bootpc_globalcontext *gctx, struct thread *td);
-
-static int	bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
-		    struct bootpc_globalcontext *gctx, struct thread *td);
-
-static void	bootpc_decode_reply(struct nfsv3_diskless *nd,
-		    struct bootpc_ifcontext *ifctx,
-		    struct bootpc_globalcontext *gctx);
-
-static int	bootpc_received(struct bootpc_globalcontext *gctx,
-		    struct bootpc_ifcontext *ifctx);
-
-static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
-static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
-static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
-
-/*
- * In order to have multiple active interfaces with address 0.0.0.0
- * and be able to send data to a selected interface, we perform
- * some tricks:
- *
- *  - The 'broadcast' address is different for each interface.
- *
- *  - We temporarily add routing pointing 255.255.255.255 to the
- *    selected interface broadcast address, thus the packet sent
- *    goes to that interface.
- */
-
-#ifdef BOOTP_DEBUG
-void
-bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma)
-{
-
-	if (sa == NULL) {
-		printf("(sockaddr *) <null>");
-		return;
-	}
-	switch (sa->sa_family) {
-	case AF_INET:
-	{
-		struct sockaddr_in *sin;
-
-		sin = (struct sockaddr_in *) sa;
-		printf("inet ");
-		print_sin_addr(sin);
-		if (ma != NULL) {
-			sin = (struct sockaddr_in *) ma;
-			printf(" mask ");
-			print_sin_addr(sin);
-		}
-	}
-	break;
-	case AF_LINK:
-	{
-		struct sockaddr_dl *sli;
-		int i;
-
-		sli = (struct sockaddr_dl *) sa;
-		printf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
-		for (i = 0; i < sli->sdl_alen; i++) {
-			if (i > 0)
-				printf(":");
-			printf("%x", ((unsigned char *) LLADDR(sli))[i]);
-		}
-	}
-	break;
-	default:
-		printf("af%d", sa->sa_family);
-	}
-}
-
-void
-bootpboot_p_rtentry(struct rtentry *rt)
-{
-
-	bootpboot_p_sa(rt_key(rt), rt_mask(rt));
-	printf(" ");
-	bootpboot_p_sa(rt->rt_gateway, NULL);
-	printf(" ");
-	printf("flags %x", (unsigned short) rt->rt_flags);
-	printf(" %d", (int) rt->rt_rmx.rmx_expire);
-	printf(" %s\n", rt->rt_ifp->if_xname);
-}
-
-void
-bootpboot_p_tree(struct radix_node *rn)
-{
-
-	while (rn != NULL) {
-		if (rn->rn_bit < 0) {
-			if ((rn->rn_flags & RNF_ROOT) != 0) {
-			} else {
-				bootpboot_p_rtentry((struct rtentry *) rn);
-			}
-			rn = rn->rn_dupedkey;
-		} else {
-			bootpboot_p_tree(rn->rn_left);
-			bootpboot_p_tree(rn->rn_right);
-			return;
-		}
-	}
-}
-
-void
-bootpboot_p_rtlist(void)
-{
-	struct radix_node_head *rnh;
-
-	printf("Routing table:\n");
-	rnh = rt_tables_get_rnh(0, AF_INET);
-	if (rnh == NULL)
-		return;
-	RADIX_NODE_HEAD_RLOCK(rnh);	/* could sleep XXX */
-	bootpboot_p_tree(rnh->rnh_treetop);
-	RADIX_NODE_HEAD_RUNLOCK(rnh);
-}
-
-void
-bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
-{
-
-	printf("%s flags %x, addr ",
-	       ifp->if_xname, ifp->if_flags);
-	print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
-	printf(", broadcast ");
-	print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
-	printf(", netmask ");
-	print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
-	printf("\n");
-}
-
-void
-bootpboot_p_iflist(void)
-{
-	struct ifnet *ifp;
-	struct ifaddr *ifa;
-
-	printf("Interface list:\n");
-	IFNET_RLOCK();
-	for (ifp = TAILQ_FIRST(&V_ifnet);
-	     ifp != NULL;
-	     ifp = TAILQ_NEXT(ifp, if_link)) {
-		for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
-		     ifa != NULL;
-		     ifa = TAILQ_NEXT(ifa, ifa_link))
-			if (ifa->ifa_addr->sa_family == AF_INET)
-				bootpboot_p_if(ifp, ifa);
-	}
-	IFNET_RUNLOCK();
-}
-#endif /* defined(BOOTP_DEBUG) */
-
-static void
-clear_sinaddr(struct sockaddr_in *sin)
-{
-
-	bzero(sin, sizeof(*sin));
-	sin->sin_len = sizeof(*sin);
-	sin->sin_family = AF_INET;
-	sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
-	sin->sin_port = 0;
-}
-
-static void
-allocifctx(struct bootpc_globalcontext *gctx)
-{
-	struct bootpc_ifcontext *ifctx;
-	ifctx = (struct bootpc_ifcontext *) malloc(sizeof(*ifctx),
-						   M_TEMP, M_WAITOK | M_ZERO);
-	if (ifctx == NULL)
-		panic("Failed to allocate bootp interface context structure");
-
-	ifctx->xid = gctx->xid;
-#ifdef BOOTP_NO_DHCP
-	ifctx->state = IF_BOOTP_UNRESOLVED;
-#else
-	ifctx->state = IF_DHCP_UNRESOLVED;
-#endif
-	gctx->xid += 0x100;
-	if (gctx->interfaces != NULL)
-		gctx->lastinterface->next = ifctx;
-	else
-		gctx->interfaces = ifctx;
-	gctx->lastinterface = ifctx;
-}
-
-static __inline int
-bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
-{
-
-	if (ifctx->state == IF_BOOTP_RESOLVED ||
-	    ifctx->state == IF_DHCP_RESOLVED)
-		return 1;
-	return 0;
-}
-
-static __inline int
-bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
-{
-
-	if (ifctx->state == IF_BOOTP_UNRESOLVED ||
-	    ifctx->state == IF_DHCP_UNRESOLVED)
-		return 1;
-	return 0;
-}
-
-static __inline int
-bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
-{
-
-	if (ifctx->state == IF_BOOTP_FAILED ||
-	    ifctx->state == IF_DHCP_FAILED)
-		return 1;
-	return 0;
-}
-
-static int
-bootpc_received(struct bootpc_globalcontext *gctx,
-    struct bootpc_ifcontext *ifctx)
-{
-	unsigned char dhcpreplytype;
-	char *p;
-
-	/*
-	 * Need timeout for fallback to less
-	 * desirable alternative.
-	 */
-
-	/* This call used for the side effect (badopt flag) */
-	(void) bootpc_tag(&gctx->tmptag, &gctx->reply,
-			  gctx->replylen,
-			  TAG_END);
-
-	/* If packet is invalid, ignore it */
-	if (gctx->tmptag.badopt != 0)
-		return 0;
-
-	p = bootpc_tag(&gctx->tmptag, &gctx->reply,
-		       gctx->replylen, TAG_DHCP_MSGTYPE);
-	if (p != NULL)
-		dhcpreplytype = *p;
-	else
-		dhcpreplytype = DHCP_NOMSG;
-
-	switch (ifctx->dhcpquerytype) {
-	case DHCP_DISCOVER:
-		if (dhcpreplytype != DHCP_OFFER 	/* Normal DHCP offer */
-#ifndef BOOTP_FORCE_DHCP
-		    && dhcpreplytype != DHCP_NOMSG	/* Fallback to BOOTP */
-#endif
-			)
-			return 0;
-		break;
-	case DHCP_REQUEST:
-		if (dhcpreplytype != DHCP_ACK)
-			return 0;
-	case DHCP_NOMSG:
-		break;
-	}
-
-	/* Ignore packet unless it gives us a root tag we didn't have */
-
-	if ((ifctx->state == IF_BOOTP_RESOLVED ||
-	     (ifctx->dhcpquerytype == DHCP_DISCOVER &&
-	      (ifctx->state == IF_DHCP_OFFERED ||
-	       ifctx->state == IF_DHCP_RESOLVED))) &&
-	    (bootpc_tag(&gctx->tmptag, &ifctx->reply,
-			ifctx->replylen,
-			TAG_ROOT) != NULL ||
-	     bootpc_tag(&gctx->tmptag, &gctx->reply,
-			gctx->replylen,
-			TAG_ROOT) == NULL))
-		return 0;
-
-	bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
-	ifctx->replylen = gctx->replylen;
-
-	/* XXX: Only reset if 'perfect' response */
-	if (ifctx->state == IF_BOOTP_UNRESOLVED)
-		ifctx->state = IF_BOOTP_RESOLVED;
-	else if (ifctx->state == IF_DHCP_UNRESOLVED &&
-		 ifctx->dhcpquerytype == DHCP_DISCOVER) {
-		if (dhcpreplytype == DHCP_OFFER)
-			ifctx->state = IF_DHCP_OFFERED;
-		else
-			ifctx->state = IF_BOOTP_RESOLVED;	/* Fallback */
-	} else if (ifctx->state == IF_DHCP_OFFERED &&
-		   ifctx->dhcpquerytype == DHCP_REQUEST)
-		ifctx->state = IF_DHCP_RESOLVED;
-
-
-	if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
-	    ifctx->state != IF_BOOTP_RESOLVED) {
-		p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
-			       ifctx->replylen, TAG_DHCP_SERVERID);
-		if (p != NULL && gctx->tmptag.taglen == 4) {
-			memcpy(&ifctx->dhcpserver, p, 4);
-			ifctx->gotdhcpserver = 1;
-		} else
-			ifctx->gotdhcpserver = 0;
-		return 1;
-	}
-
-	ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
-					 ifctx->replylen,
-					 TAG_ROOT) != NULL);
-	ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
-				   ifctx->replylen,
-				   TAG_ROUTERS) != NULL);
-	ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
-					ifctx->replylen,
-					TAG_SUBNETMASK) != NULL);
-	return 1;
-}
-
-static int
-bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
-{
-	struct socket *so;
-	struct sockaddr_in *sin, dst;
-	struct uio auio;
-	struct sockopt sopt;
-	struct iovec aio;
-	int error, on, rcvflg, timo, len;
-	time_t atimo;
-	time_t rtimo;
-	struct timeval tv;
-	struct bootpc_ifcontext *ifctx;
-	int outstanding;
-	int gotrootpath;
-	int retry;
-	const char *s;
-
-	/*
-	 * Create socket and set its recieve timeout.
-	 */
-	error = socreate(AF_INET, &so, SOCK_DGRAM, 0, td->td_ucred, td);
-	if (error != 0)
-		goto out0;
-
-	tv.tv_sec = 1;
-	tv.tv_usec = 0;
-	bzero(&sopt, sizeof(sopt));
-	sopt.sopt_dir = SOPT_SET;
-	sopt.sopt_level = SOL_SOCKET;
-	sopt.sopt_name = SO_RCVTIMEO;
-	sopt.sopt_val = &tv;
-	sopt.sopt_valsize = sizeof tv;
-
-	error = sosetopt(so, &sopt);
-	if (error != 0)
-		goto out;
-
-	/*
-	 * Enable broadcast.
-	 */
-	on = 1;
-	sopt.sopt_name = SO_BROADCAST;
-	sopt.sopt_val = &on;
-	sopt.sopt_valsize = sizeof on;
-
-	error = sosetopt(so, &sopt);
-	if (error != 0)
-		goto out;
-
-	/*
-	 * Disable routing.
-	 */
-
-	on = 1;
-	sopt.sopt_name = SO_DONTROUTE;
-	sopt.sopt_val = &on;
-	sopt.sopt_valsize = sizeof on;
-
-	error = sosetopt(so, &sopt);
-	if (error != 0)
-		goto out;
-
-	/*
-	 * Bind the local endpoint to a bootp client port.
-	 */
-	sin = &dst;
-	clear_sinaddr(sin);
-	sin->sin_port = htons(IPPORT_BOOTPC);
-	error = sobind(so, (struct sockaddr *)sin, td);
-	if (error != 0) {
-		printf("bind failed\n");
-		goto out;
-	}
-
-	/*
-	 * Setup socket address for the server.
-	 */
-	sin = &dst;
-	clear_sinaddr(sin);
-	sin->sin_addr.s_addr = INADDR_BROADCAST;
-	sin->sin_port = htons(IPPORT_BOOTPS);
-
-	/*
-	 * Send it, repeatedly, until a reply is received,
-	 * but delay each re-send by an increasing amount.
-	 * If the delay hits the maximum, start complaining.
-	 */
-	timo = 0;
-	rtimo = 0;
-	for (;;) {
-
-		outstanding = 0;
-		gotrootpath = 0;
-
-		for (ifctx = gctx->interfaces;
-		     ifctx != NULL;
-		     ifctx = ifctx->next) {
-			if (bootpc_ifctx_isresolved(ifctx) != 0 &&
-			    bootpc_tag(&gctx->tmptag, &ifctx->reply,
-				       ifctx->replylen,
-				       TAG_ROOT) != NULL)
-				gotrootpath = 1;
-		}
-
-		for (ifctx = gctx->interfaces;
-		     ifctx != NULL;
-		     ifctx = ifctx->next) {
-			ifctx->outstanding = 0;
-			if (bootpc_ifctx_isresolved(ifctx)  != 0 &&
-			    gotrootpath != 0) {
-				continue;
-			}
-			if (bootpc_ifctx_isfailed(ifctx) != 0)
-				continue;
-
-			outstanding++;
-			ifctx->outstanding = 1;
-
-			/* Proceed to next step in DHCP negotiation */
-			if ((ifctx->state == IF_DHCP_OFFERED &&
-			     ifctx->dhcpquerytype != DHCP_REQUEST) ||
-			    (ifctx->state == IF_DHCP_UNRESOLVED &&
-			     ifctx->dhcpquerytype != DHCP_DISCOVER) ||
-			    (ifctx->state == IF_BOOTP_UNRESOLVED &&
-			     ifctx->dhcpquerytype != DHCP_NOMSG)) {
-				ifctx->sentmsg = 0;
-				bootpc_compose_query(ifctx, gctx, td);
-			}
-
-			/* Send BOOTP request (or re-send). */
-
-			if (ifctx->sentmsg == 0) {
-				switch(ifctx->dhcpquerytype) {
-				case DHCP_DISCOVER:
-					s = "DHCP Discover";
-					break;
-				case DHCP_REQUEST:
-					s = "DHCP Request";
-					break;
-				case DHCP_NOMSG:
-				default:
-					s = "BOOTP Query";
-					break;
-				}
-				printf("Sending %s packet from "
-				       "interface %s (%*D)\n",
-				       s,
-				       ifctx->ireq.ifr_name,
-				       ifctx->sdl->sdl_alen,
-				       (unsigned char *) LLADDR(ifctx->sdl),
-				       ":");
-				ifctx->sentmsg = 1;
-			}
-
-			aio.iov_base = (caddr_t) &ifctx->call;
-			aio.iov_len = sizeof(ifctx->call);
-
-			auio.uio_iov = &aio;
-			auio.uio_iovcnt = 1;
-			auio.uio_segflg = UIO_SYSSPACE;
-			auio.uio_rw = UIO_WRITE;
-			auio.uio_offset = 0;
-			auio.uio_resid = sizeof(ifctx->call);
-			auio.uio_td = td;
-
-			/* Set netmask to 0.0.0.0 */
-
-			sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
-			clear_sinaddr(sin);
-			error = ifioctl(ifctx->so, SIOCSIFNETMASK,
-					(caddr_t) &ifctx->ireq, td);
-			if (error != 0)
-				panic("bootpc_call:"
-				      "set if netmask, error=%d",
-				      error);
-
-			error = sosend(so, (struct sockaddr *) &dst,
-				       &auio, NULL, NULL, 0, td);
-			if (error != 0) {
-				printf("bootpc_call: sosend: %d state %08x\n",
-				       error, (int) so->so_state);
-			}
-
-			/* XXX: Is this needed ? */
-			pause("bootpw", hz/10);
-
-			/* Set netmask to 255.0.0.0 */
-
-			sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
-			clear_sinaddr(sin);
-			sin->sin_addr.s_addr = htonl(0xff000000u);
-			error = ifioctl(ifctx->so, SIOCSIFNETMASK,
-					(caddr_t) &ifctx->ireq, td);
-			if (error != 0)
-				panic("bootpc_call:"
-				      "set if netmask, error=%d",
-				      error);
-
-		}
-
-		if (outstanding == 0 &&
-		    (rtimo == 0 || time_second >= rtimo)) {
-			error = 0;
-			goto gotreply;
-		}
-
-		/* Determine new timeout. */
-		if (timo < MAX_RESEND_DELAY)
-			timo++;
-		else {
-			printf("DHCP/BOOTP timeout for server ");
-			print_sin_addr(&dst);
-			printf("\n");
-		}
-
-		/*
-		 * Wait for up to timo seconds for a reply.
-		 * The socket receive timeout was set to 1 second.
-		 */
-		atimo = timo + time_second;
-		while (time_second < atimo) {
-			aio.iov_base = (caddr_t) &gctx->reply;
-			aio.iov_len = sizeof(gctx->reply);
-
-			auio.uio_iov = &aio;
-			auio.uio_iovcnt = 1;
-			auio.uio_segflg = UIO_SYSSPACE;
-			auio.uio_rw = UIO_READ;
-			auio.uio_offset = 0;
-			auio.uio_resid = sizeof(gctx->reply);
-			auio.uio_td = td;
-
-			rcvflg = 0;
-			error = soreceive(so, NULL, &auio,
-					  NULL, NULL, &rcvflg);
-			gctx->secs = time_second - gctx->starttime;
-			for (ifctx = gctx->interfaces;
-			     ifctx != NULL;
-			     ifctx = ifctx->next) {
-				if (bootpc_ifctx_isresolved(ifctx) != 0 ||
-				    bootpc_ifctx_isfailed(ifctx) != 0)
-					continue;
-
-				ifctx->call.secs = htons(gctx->secs);
-			}
-			if (error == EWOULDBLOCK)
-				continue;
-			if (error != 0)
-				goto out;
-			len = sizeof(gctx->reply) - auio.uio_resid;
-
-			/* Do we have the required number of bytes ? */
-			if (len < BOOTP_MIN_LEN)
-				continue;
-			gctx->replylen = len;
-
-			/* Is it a reply? */
-			if (gctx->reply.op != BOOTP_REPLY)
-				continue;
-
-			/* Is this an answer to our query */
-			for (ifctx = gctx->interfaces;
-			     ifctx != NULL;
-			     ifctx = ifctx->next) {
-				if (gctx->reply.xid != ifctx->call.xid)
-					continue;
-
-				/* Same HW address size ? */
-				if (gctx->reply.hlen != ifctx->call.hlen)
-					continue;
-
-				/* Correct HW address ? */
-				if (bcmp(gctx->reply.chaddr,
-					 ifctx->call.chaddr,
-					 ifctx->call.hlen) != 0)
-					continue;
-
-				break;
-			}
-
-			if (ifctx != NULL) {
-				s =  bootpc_tag(&gctx->tmptag,
-						&gctx->reply,
-						gctx->replylen,
-						TAG_DHCP_MSGTYPE);
-				if (s != NULL) {
-					switch (*s) {
-					case DHCP_OFFER:
-						s = "DHCP Offer";
-						break;
-					case DHCP_ACK:
-						s = "DHCP Ack";
-						break;
-					default:
-						s = "DHCP (unexpected)";
-						break;
-					}
-				} else
-					s = "BOOTP Reply";
-
-				printf("Received %s packet"
-				       " on %s from ",
-				       s,
-				       ifctx->ireq.ifr_name);
-				print_in_addr(gctx->reply.siaddr);
-				if (gctx->reply.giaddr.s_addr !=
-				    htonl(INADDR_ANY)) {
-					printf(" via ");
-					print_in_addr(gctx->reply.giaddr);
-				}
-				if (bootpc_received(gctx, ifctx) != 0) {
-					printf(" (accepted)");
-					if (ifctx->outstanding) {
-						ifctx->outstanding = 0;
-						outstanding--;
-					}
-					/* Network settle delay */
-					if (outstanding == 0)
-						atimo = time_second +
-							BOOTP_SETTLE_DELAY;
-				} else
-					printf(" (ignored)");
-				if (ifctx->gotrootpath) {
-					gotrootpath = 1;
-					rtimo = time_second +
-						BOOTP_SETTLE_DELAY;
-					printf(" (got root path)");
-				} else
-					printf(" (no root path)");
-				printf("\n");
-			}
-		} /* while secs */
-#ifdef BOOTP_TIMEOUT
-		if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
-			break;
-#endif
-		/* Force a retry if halfway in DHCP negotiation */
-		retry = 0;
-		for (ifctx = gctx->interfaces; ifctx != NULL;
-		     ifctx = ifctx->next) {
-			if (ifctx->state == IF_DHCP_OFFERED) {
-				if (ifctx->dhcpquerytype == DHCP_DISCOVER)
-					retry = 1;
-				else
-					ifctx->state = IF_DHCP_UNRESOLVED;
-			}
-		}
-
-		if (retry != 0)
-			continue;
-
-		if (gotrootpath != 0) {
-			gctx->gotrootpath = gotrootpath;
-			if (rtimo != 0 && time_second >= rtimo)
-				break;
-		}
-	} /* forever send/receive */
-
-	/*
-	 * XXX: These are errors of varying seriousness being silently
-	 * ignored
-	 */
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
-		if (bootpc_ifctx_isresolved(ifctx) == 0) {
-			printf("%s timeout for interface %s\n",
-			       ifctx->dhcpquerytype != DHCP_NOMSG ?
-			       "DHCP" : "BOOTP",
-			       ifctx->ireq.ifr_name);
-		}
-	}
-	if (gctx->gotrootpath != 0) {
-#if 0
-		printf("Got a root path, ignoring remaining timeout\n");
-#endif
-		error = 0;
-		goto out;
-	}
-#ifndef BOOTP_NFSROOT
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
-		if (bootpc_ifctx_isresolved(ifctx) != 0) {
-			error = 0;
-			goto out;
-		}
-	}
-#endif
-	error = ETIMEDOUT;
-	goto out;
-
-gotreply:
-out:
-	soclose(so);
-out0:
-	return error;
-}
-
-static int
-bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
-    struct bootpc_globalcontext *gctx, struct thread *td)
-{
-	struct sockaddr_in *sin;
-	int error;
-	struct ifreq *ireq;
-	struct socket *so;
-	struct ifaddr *ifa;
-	struct sockaddr_dl *sdl;
-
-	error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td->td_ucred, td);
-	if (error != 0)
-		panic("nfs_boot: socreate, error=%d", error);
-
-	ireq = &ifctx->ireq;
-	so = ifctx->so;
-
-	/*
-	 * Bring up the interface.
-	 *
-	 * Get the old interface flags and or IFF_UP into them; if
-	 * IFF_UP set blindly, interface selection can be clobbered.
-	 */
-	error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, td);
-	if (error != 0)
-		panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
-	ireq->ifr_flags |= IFF_UP;
-	error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, td);
-	if (error != 0)
-		panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
-
-	/*
-	 * Do enough of ifconfig(8) so that the chosen interface
-	 * can talk to the servers.  (just set the address)
-	 */
-
-	/* addr is 0.0.0.0 */
-
-	sin = (struct sockaddr_in *) &ireq->ifr_addr;
-	clear_sinaddr(sin);
-	error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, td);
-	if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
-		panic("bootpc_fakeup_interface: "
-		      "set if addr, error=%d", error);
-
-	/* netmask is 255.0.0.0 */
-
-	sin = (struct sockaddr_in *) &ireq->ifr_addr;
-	clear_sinaddr(sin);
-	sin->sin_addr.s_addr = htonl(0xff000000u);
-	error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, td);
-	if (error != 0)
-		panic("bootpc_fakeup_interface: set if netmask, error=%d",
-		      error);
-
-	/* Broadcast is 255.255.255.255 */
-
-	sin = (struct sockaddr_in *)&ireq->ifr_addr;
-	clear_sinaddr(sin);
-	clear_sinaddr(&ifctx->broadcast);
-	sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
-	ifctx->broadcast.sin_addr.s_addr = sin->sin_addr.s_addr;
-
-	error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, td);
-	if (error != 0)
-		panic("bootpc_fakeup_interface: "
-		      "set if broadcast addr, error=%d",
-		      error);
-
-	/* Get HW address */
-
-	sdl = NULL;
-	TAILQ_FOREACH(ifa, &ifctx->ifp->if_addrhead, ifa_link)
-		if (ifa->ifa_addr->sa_family == AF_LINK) {
-			sdl = (struct sockaddr_dl *)ifa->ifa_addr;
-			if (sdl->sdl_type == IFT_ETHER)
-				break;
-		}
-
-	if (sdl == NULL)
-		panic("bootpc: Unable to find HW address for %s",
-		      ifctx->ireq.ifr_name);
-	ifctx->sdl = sdl;
-
-	return error;
-}
-
-
-static int
-bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
-    struct bootpc_globalcontext *gctx, struct thread *td)
-{
-	int error;
-	struct sockaddr_in defdst;
-	struct sockaddr_in defmask;
-	struct sockaddr_in *sin;
-	struct ifreq *ireq;
-	struct socket *so;
-	struct sockaddr_in *myaddr;
-	struct sockaddr_in *netmask;
-	struct sockaddr_in *gw;
-
-	ireq = &ifctx->ireq;
-	so = ifctx->so;
-	myaddr = &ifctx->myaddr;
-	netmask = &ifctx->netmask;
-	gw = &ifctx->gw;
-
-	if (bootpc_ifctx_isresolved(ifctx) == 0) {
-
-		/* Shutdown interfaces where BOOTP failed */
-
-		printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
-		error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, td);
-		if (error != 0)
-			panic("bootpc_adjust_interface: "
-			      "SIOCGIFFLAGS, error=%d", error);
-		ireq->ifr_flags &= ~IFF_UP;
-		error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, td);
-		if (error != 0)
-			panic("bootpc_adjust_interface: "
-			      "SIOCSIFFLAGS, error=%d", error);
-
-		sin = (struct sockaddr_in *) &ireq->ifr_addr;
-		clear_sinaddr(sin);
-		error = ifioctl(so, SIOCDIFADDR, (caddr_t) ireq, td);
-		if (error != 0 && (error != EEXIST ||
-				   ifctx == gctx->interfaces))
-			panic("bootpc_adjust_interface: "
-			      "SIOCDIFADDR, error=%d", error);
-
-		return 0;
-	}
-
-	printf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
-	/*
-	 * Do enough of ifconfig(8) so that the chosen interface
-	 * can talk to the servers.  (just set the address)
-	 */
-	bcopy(netmask, &ireq->ifr_addr, sizeof(*netmask));
-	error = ifioctl(so, SIOCSIFNETMASK, (caddr_t) ireq, td);
-	if (error != 0)
-		panic("bootpc_adjust_interface: "
-		      "set if netmask, error=%d", error);
-
-	/* Broadcast is with host part of IP address all 1's */
-
-	sin = (struct sockaddr_in *) &ireq->ifr_addr;
-	clear_sinaddr(sin);
-	sin->sin_addr.s_addr = myaddr->sin_addr.s_addr |
-		~ netmask->sin_addr.s_addr;
-	error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t) ireq, td);
-	if (error != 0)
-		panic("bootpc_adjust_interface: "
-		      "set if broadcast addr, error=%d", error);
-
-	bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr));
-	error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, td);
-	if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
-		panic("bootpc_adjust_interface: "
-		      "set if addr, error=%d", error);
-
-	/* Add new default route */
-
-	if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
-		clear_sinaddr(&defdst);
-		clear_sinaddr(&defmask);
-		/* XXX MRT just table 0 */
-		error = rtrequest_fib(RTM_ADD,
-				  (struct sockaddr *) &defdst,
-				  (struct sockaddr *) gw,
-				  (struct sockaddr *) &defmask,
-				  (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, 0);
-		if (error != 0) {
-			printf("bootpc_adjust_interface: "
-			       "add net route, error=%d\n", error);
-			return error;
-		}
-	}
-
-	return 0;
-}
-
-static int
-setfs(struct sockaddr_in *addr, char *path, char *p,
-    const struct in_addr *siaddr)
-{
-
-	if (getip(&p, &addr->sin_addr) == 0) {
-		if (siaddr != NULL && *p == '/')
-			bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
-		else
-			return 0;
-	} else {
-		if (*p != ':')
-			return 0;
-		p++;
-	}
-		
-	addr->sin_len = sizeof(struct sockaddr_in);
-	addr->sin_family = AF_INET;
-
-	strlcpy(path, p, MNAMELEN);
-	return 1;
-}
-
-static int
-getip(char **ptr, struct in_addr *addr)
-{
-	char *p;
-	unsigned int ip;
-	int val;
-
-	p = *ptr;
-	ip = 0;
-	if (((val = getdec(&p)) < 0) || (val > 255))
-		return 0;
-	ip = val << 24;
-	if (*p != '.')
-		return 0;
-	p++;
-	if (((val = getdec(&p)) < 0) || (val > 255))
-		return 0;
-	ip |= (val << 16);
-	if (*p != '.')
-		return 0;
-	p++;
-	if (((val = getdec(&p)) < 0) || (val > 255))
-		return 0;
-	ip |= (val << 8);
-	if (*p != '.')
-		return 0;
-	p++;
-	if (((val = getdec(&p)) < 0) || (val > 255))
-		return 0;
-	ip |= val;
-
-	addr->s_addr = htonl(ip);
-	*ptr = p;
-	return 1;
-}
-
-static int
-getdec(char **ptr)
-{
-	char *p;
-	int ret;
-
-	p = *ptr;
-	ret = 0;
-	if ((*p < '0') || (*p > '9'))
-		return -1;
-	while ((*p >= '0') && (*p <= '9')) {
-		ret = ret * 10 + (*p - '0');
-		p++;
-	}
-	*ptr = p;
-	return ret;
-}
-
-static void
-mountopts(struct nfs_args *args, char *p)
-{
-	args->version = NFS_ARGSVERSION;
-	args->rsize = BOOTP_BLOCKSIZE;
-	args->wsize = BOOTP_BLOCKSIZE;
-	args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
-	args->sotype = SOCK_DGRAM;
-	if (p != NULL)
-		nfs_parse_options(p, args);
-}
-
-static int
-xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
-{
-	struct mbuf *m;
-	int alignedlen;
-
-	m = *mptr;
-	alignedlen = ( len + 3 ) & ~3;
-
-	if (m->m_len < alignedlen) {
-		m = m_pullup(m, alignedlen);
-		if (m == NULL) {
-			*mptr = NULL;
-			return EBADRPC;
-		}
-	}
-	bcopy(mtod(m, u_char *), buf, len);
-	m_adj(m, alignedlen);
-	*mptr = m;
-	return 0;
-}
-
-static int
-xdr_int_decode(struct mbuf **mptr, int *iptr)
-{
-	u_int32_t i;
-
-	if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
-		return EBADRPC;
-	*iptr = fxdr_unsigned(u_int32_t, i);
-	return 0;
-}
-
-static void
-print_sin_addr(struct sockaddr_in *sin)
-{
-
-	print_in_addr(sin->sin_addr);
-}
-
-static void
-print_in_addr(struct in_addr addr)
-{
-	unsigned int ip;
-
-	ip = ntohl(addr.s_addr);
-	printf("%d.%d.%d.%d",
-	       ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
-}
-
-static void
-bootpc_compose_query(struct bootpc_ifcontext *ifctx,
-    struct bootpc_globalcontext *gctx, struct thread *td)
-{
-	unsigned char *vendp;
-	unsigned char vendor_client[64];
-	uint32_t leasetime;
-	uint8_t vendor_client_len;
-
-	ifctx->gotrootpath = 0;
-
-	bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
-
-	/* bootpc part */
-	ifctx->call.op = BOOTP_REQUEST; 	/* BOOTREQUEST */
-	ifctx->call.htype = 1;			/* 10mb ethernet */
-	ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
-	ifctx->call.hops = 0;
-	if (bootpc_ifctx_isunresolved(ifctx) != 0)
-		ifctx->xid++;
-	ifctx->call.xid = txdr_unsigned(ifctx->xid);
-	bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
-
-	vendp = ifctx->call.vend;
-	*vendp++ = 99;		/* RFC1048 cookie */
-	*vendp++ = 130;
-	*vendp++ = 83;
-	*vendp++ = 99;
-	*vendp++ = TAG_MAXMSGSIZE;
-	*vendp++ = 2;
-	*vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
-	*vendp++ = sizeof(struct bootp_packet) & 255;
-
-	snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
-		ostype, MACHINE, osrelease);
-	vendor_client_len = strlen(vendor_client);
-	*vendp++ = TAG_VENDOR_INDENTIFIER;
-	*vendp++ = vendor_client_len;
-	memcpy(vendp, vendor_client, vendor_client_len);
-	vendp += vendor_client_len;
-	ifctx->dhcpquerytype = DHCP_NOMSG;
-	switch (ifctx->state) {
-	case IF_DHCP_UNRESOLVED:
-		*vendp++ = TAG_DHCP_MSGTYPE;
-		*vendp++ = 1;
-		*vendp++ = DHCP_DISCOVER;
-		ifctx->dhcpquerytype = DHCP_DISCOVER;
-		ifctx->gotdhcpserver = 0;
-		break;
-	case IF_DHCP_OFFERED:
-		*vendp++ = TAG_DHCP_MSGTYPE;
-		*vendp++ = 1;
-		*vendp++ = DHCP_REQUEST;
-		ifctx->dhcpquerytype = DHCP_REQUEST;
-		*vendp++ = TAG_DHCP_REQ_ADDR;
-		*vendp++ = 4;
-		memcpy(vendp, &ifctx->reply.yiaddr, 4);
-		vendp += 4;
-		if (ifctx->gotdhcpserver != 0) {
-			*vendp++ = TAG_DHCP_SERVERID;
-			*vendp++ = 4;
-			memcpy(vendp, &ifctx->dhcpserver, 4);
-			vendp += 4;
-		}
-		*vendp++ = TAG_DHCP_LEASETIME;
-		*vendp++ = 4;
-		leasetime = htonl(300);
-		memcpy(vendp, &leasetime, 4);
-		vendp += 4;
-		break;
-	default:
-		break;
-	}
-	*vendp = TAG_END;
-
-	ifctx->call.secs = 0;
-	ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
-}
-
-static int
-bootpc_hascookie(struct bootp_packet *bp)
-{
-
-	return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
-		bp->vend[2] == 83 && bp->vend[3] == 99);
-}
-
-static void
-bootpc_tag_helper(struct bootpc_tagcontext *tctx,
-    unsigned char *start, int len, int tag)
-{
-	unsigned char *j;
-	unsigned char *ej;
-	unsigned char code;
-
-	if (tctx->badtag != 0 || tctx->badopt != 0)
-		return;
-
-	j = start;
-	ej = j + len;
-
-	while (j < ej) {
-		code = *j++;
-		if (code == TAG_PAD)
-			continue;
-		if (code == TAG_END)
-			return;
-		if (j >= ej || j + *j + 1 > ej) {
-			tctx->badopt = 1;
-			return;
-		}
-		len = *j++;
-		if (code == tag) {
-			if (tctx->taglen + len > TAG_MAXLEN) {
-				tctx->badtag = 1;
-				return;
-			}
-			tctx->foundopt = 1;
-			if (len > 0)
-				memcpy(tctx->buf + tctx->taglen,
-				       j, len);
-			tctx->taglen += len;
-		}
-		if (code == TAG_OVERLOAD)
-			tctx->overload = *j;
-
-		j += len;
-	}
-}
-
-static unsigned char *
-bootpc_tag(struct bootpc_tagcontext *tctx,
-    struct bootp_packet *bp, int len, int tag)
-{
-	tctx->overload = 0;
-	tctx->badopt = 0;
-	tctx->badtag = 0;
-	tctx->foundopt = 0;
-	tctx->taglen = 0;
-
-	if (bootpc_hascookie(bp) == 0)
-		return NULL;
-
-	bootpc_tag_helper(tctx, &bp->vend[4],
-			  (unsigned char *) bp + len - &bp->vend[4], tag);
-
-	if ((tctx->overload & OVERLOAD_FILE) != 0)
-		bootpc_tag_helper(tctx,
-				  (unsigned char *) bp->file,
-				  sizeof(bp->file),
-				  tag);
-	if ((tctx->overload & OVERLOAD_SNAME) != 0)
-		bootpc_tag_helper(tctx,
-				  (unsigned char *) bp->sname,
-				  sizeof(bp->sname),
-				  tag);
-
-	if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
-		return NULL;
-	tctx->buf[tctx->taglen] = '\0';
-	return tctx->buf;
-}
-
-static void
-bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
-    struct bootpc_globalcontext *gctx)
-{
-	char *p;
-	unsigned int ip;
-
-	ifctx->gotgw = 0;
-	ifctx->gotnetmask = 0;
-
-	clear_sinaddr(&ifctx->myaddr);
-	clear_sinaddr(&ifctx->netmask);
-	clear_sinaddr(&ifctx->gw);
-
-	ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
-
-	ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
-
-	printf("%s at ", ifctx->ireq.ifr_name);
-	print_sin_addr(&ifctx->myaddr);
-	printf(" server ");
-	print_in_addr(ifctx->reply.siaddr);
-
-	ifctx->gw.sin_addr = ifctx->reply.giaddr;
-	if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
-		printf(" via gateway ");
-		print_in_addr(ifctx->reply.giaddr);
-	}
-
-	/* This call used for the side effect (overload flag) */
-	(void) bootpc_tag(&gctx->tmptag,
-			  &ifctx->reply, ifctx->replylen, TAG_END);
-
-	if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
-		if (ifctx->reply.sname[0] != '\0')
-			printf(" server name %s", ifctx->reply.sname);
-	if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
-		if (ifctx->reply.file[0] != '\0')
-			printf(" boot file %s", ifctx->reply.file);
-
-	printf("\n");
-
-	p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
-		       TAG_SUBNETMASK);
-	if (p != NULL) {
-		if (gctx->tag.taglen != 4)
-			panic("bootpc: subnet mask len is %d",
-			      gctx->tag.taglen);
-		bcopy(p, &ifctx->netmask.sin_addr, 4);
-		ifctx->gotnetmask = 1;
-		printf("subnet mask ");
-		print_sin_addr(&ifctx->netmask);
-		printf(" ");
-	}
-
-	p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
-		       TAG_ROUTERS);
-	if (p != NULL) {
-		/* Routers */
-		if (gctx->tag.taglen % 4)
-			panic("bootpc: Router Len is %d", gctx->tag.taglen);
-		if (gctx->tag.taglen > 0) {
-			bcopy(p, &ifctx->gw.sin_addr, 4);
-			printf("router ");
-			print_sin_addr(&ifctx->gw);
-			printf(" ");
-			ifctx->gotgw = 1;
-			gctx->gotgw = 1;
-		}
-	}
-
-	p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
-		       TAG_ROOT);
-	if (p != NULL) {
-		if (gctx->setrootfs != NULL) {
-			printf("rootfs %s (ignored) ", p);
-		} else 	if (setfs(&nd->root_saddr,
-				  nd->root_hostnam, p, &ifctx->reply.siaddr)) {
-			if (*p == '/') {
-				printf("root_server ");
-				print_sin_addr(&nd->root_saddr);
-				printf(" ");
-			}
-			printf("rootfs %s ", p);
-			gctx->gotrootpath = 1;
-			ifctx->gotrootpath = 1;
-			gctx->setrootfs = ifctx;
-
-			p = bootpc_tag(&gctx->tag, &ifctx->reply,
-				       ifctx->replylen,
-				       TAG_ROOTOPTS);
-			if (p != NULL) {
-				mountopts(&nd->root_args, p);
-				printf("rootopts %s ", p);
-			}
-		} else
-			panic("Failed to set rootfs to %s", p);
-	}
-
-	p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
-		       TAG_HOSTNAME);
-	if (p != NULL) {
-		if (gctx->tag.taglen >= MAXHOSTNAMELEN)
-			panic("bootpc: hostname >= %d bytes",
-			      MAXHOSTNAMELEN);
-		if (gctx->sethostname != NULL) {
-			printf("hostname %s (ignored) ", p);
-		} else {
-			strcpy(nd->my_hostnam, p);
-			mtx_lock(&prison0.pr_mtx);
-			strcpy(prison0.pr_hostname, p);
-			mtx_unlock(&prison0.pr_mtx);
-			printf("hostname %s ", p);
-			gctx->sethostname = ifctx;
-		}
-	}
-	p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
-			TAG_COOKIE);
-	if (p != NULL) {        /* store in a sysctl variable */
-		int i, l = sizeof(bootp_cookie) - 1;
-		for (i = 0; i < l && p[i] != '\0'; i++)
-			bootp_cookie[i] = p[i];
-		p[i] = '\0';
-	}
-
-
-	printf("\n");
-
-	if (ifctx->gotnetmask == 0) {
-		if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
-			ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
-		else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
-			ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
-		else
-			ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
-	}
-	if (ifctx->gotgw == 0) {
-		/* Use proxyarp */
-		ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
-	}
-}
-
-void
-bootpc_init(void)
-{
-	struct bootpc_ifcontext *ifctx, *nctx;	/* Interface BOOTP contexts */
-	struct bootpc_globalcontext *gctx; 	/* Global BOOTP context */
-	struct ifnet *ifp;
-	int error;
-#ifndef BOOTP_WIRED_TO
-	int ifcnt;
-#endif
-	struct nfsv3_diskless *nd;
-	struct thread *td;
-
-	nd = &nfsv3_diskless;
-	td = curthread;
-
-	/*
-	 * If already filled in, don't touch it here
-	 */
-	if (nfs_diskless_valid != 0)
-		return;
-
-	gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
-	if (gctx == NULL)
-		panic("Failed to allocate bootp global context structure");
-
-	gctx->xid = ~0xFFFF;
-	gctx->starttime = time_second;
-
-	/*
-	 * Find a network interface.
-	 */
-	CURVNET_SET(TD_TO_VNET(td));
-#ifdef BOOTP_WIRED_TO
-	printf("bootpc_init: wired to interface '%s'\n",
-	       __XSTRING(BOOTP_WIRED_TO));
-	allocifctx(gctx);
-#else
-	/*
-	 * Preallocate interface context storage, if another interface
-	 * attaches and wins the race, it won't be eligible for bootp.
-	 */
-	IFNET_RLOCK();
-	for (ifp = TAILQ_FIRST(&V_ifnet), ifcnt = 0;
-	     ifp != NULL;
-	     ifp = TAILQ_NEXT(ifp, if_link)) {
-		if ((ifp->if_flags &
-		     (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
-		    IFF_BROADCAST)
-			continue;
-		ifcnt++;
-	}
-	IFNET_RUNLOCK();
-	if (ifcnt == 0)
-		panic("bootpc_init: no eligible interfaces");
-	for (; ifcnt > 0; ifcnt--)
-		allocifctx(gctx);
-#endif
-
-	IFNET_RLOCK();
-	for (ifp = TAILQ_FIRST(&V_ifnet), ifctx = gctx->interfaces;
-	     ifp != NULL && ifctx != NULL;
-	     ifp = TAILQ_NEXT(ifp, if_link)) {
-		strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
-		    sizeof(ifctx->ireq.ifr_name));
-#ifdef BOOTP_WIRED_TO
-		if (strcmp(ifctx->ireq.ifr_name,
-			   __XSTRING(BOOTP_WIRED_TO)) != 0)
-			continue;
-#else
-		if ((ifp->if_flags &
-		     (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
-		    IFF_BROADCAST)
-			continue;
-#endif
-		ifctx->ifp = ifp;
-		ifctx = ifctx->next;
-	}
-	IFNET_RUNLOCK();
-	CURVNET_RESTORE();
-
-	if (gctx->interfaces == NULL || gctx->interfaces->ifp == NULL) {
-#ifdef BOOTP_WIRED_TO
-		panic("bootpc_init: Could not find interface specified "
-		      "by BOOTP_WIRED_TO: "
-		      __XSTRING(BOOTP_WIRED_TO));
-#else
-		panic("bootpc_init: no suitable interface");
-#endif
-	}
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
-		bootpc_fakeup_interface(ifctx, gctx, td);
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
-		bootpc_compose_query(ifctx, gctx, td);
-
-	error = bootpc_call(gctx, td);
-
-	if (error != 0) {
-#ifdef BOOTP_NFSROOT
-		panic("BOOTP call failed");
-#else
-		printf("BOOTP call failed\n");
-#endif
-	}
-
-	rootdevnames[0] = "nfs:";
-	mountopts(&nd->root_args, NULL);
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
-		if (bootpc_ifctx_isresolved(ifctx) != 0)
-			bootpc_decode_reply(nd, ifctx, gctx);
-
-#ifdef BOOTP_NFSROOT
-	if (gctx->gotrootpath == 0)
-		panic("bootpc: No root path offered");
-#endif
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
-		bootpc_adjust_interface(ifctx, gctx, td);
-
-		soclose(ifctx->so);
-	}
-
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
-		if (ifctx->gotrootpath != 0)
-			break;
-	if (ifctx == NULL) {
-		for (ifctx = gctx->interfaces;
-		     ifctx != NULL;
-		     ifctx = ifctx->next)
-			if (bootpc_ifctx_isresolved(ifctx) != 0)
-				break;
-	}
-	if (ifctx == NULL)
-		goto out;
-
-	if (gctx->gotrootpath != 0) {
-
-		setenv("boot.netif.name", ifctx->ifp->if_xname);
-
-		error = md_mount(&nd->root_saddr, nd->root_hostnam,
-				 nd->root_fh, &nd->root_fhsize,
-				 &nd->root_args, td);
-		if (error != 0)
-			panic("nfs_boot: mountd root, error=%d", error);
-
-		nfs_diskless_valid = 3;
-	}
-
-	strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
-	bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
-	bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
-	((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
-		ifctx->myaddr.sin_addr.s_addr |
-		~ ifctx->netmask.sin_addr.s_addr;
-	bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
-
-out:
-	for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = nctx) {
-		nctx = ifctx->next;
-		free(ifctx, M_TEMP);
-	}
-	free(gctx, M_TEMP);
-}
-
-/*
- * RPC: mountd/mount
- * Given a server pathname, get an NFS file handle.
- * Also, sets sin->sin_port to the NFS service port.
- */
-static int
-md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
-    struct nfs_args *args, struct thread *td)
-{
-	struct mbuf *m;
-	int error;
-	int authunixok;
-	int authcount;
-	int authver;
-
-#define	RPCPROG_MNT	100005
-#define	RPCMNT_VER1	1
-#define RPCMNT_VER3	3
-#define	RPCMNT_MOUNT	1
-#define	AUTH_SYS	1		/* unix style (uid, gids) */
-#define AUTH_UNIX	AUTH_SYS
-
-	/* XXX honor v2/v3 flags in args->flags? */
-#ifdef BOOTP_NFSV3
-	/* First try NFS v3 */
-	/* Get port number for MOUNTD. */
-	error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
-			     &mdsin->sin_port, td);
-	if (error == 0) {
-		m = xdr_string_encode(path, strlen(path));
-
-		/* Do RPC to mountd. */
-		error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
-				  RPCMNT_MOUNT, &m, NULL, td);
-	}
-	if (error == 0) {
-		args->flags |= NFSMNT_NFSV3;
-	} else {
-#endif
-		/* Fallback to NFS v2 */
-
-		/* Get port number for MOUNTD. */
-		error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
-				     &mdsin->sin_port, td);
-		if (error != 0)
-			return error;
-
-		m = xdr_string_encode(path, strlen(path));
-
-		/* Do RPC to mountd. */
-		error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
-				  RPCMNT_MOUNT, &m, NULL, td);
-		if (error != 0)
-			return error;	/* message already freed */
-
-#ifdef BOOTP_NFSV3
-	}
-#endif
-
-	if (xdr_int_decode(&m, &error) != 0 || error != 0)
-		goto bad;
-
-	if ((args->flags & NFSMNT_NFSV3) != 0) {
-		if (xdr_int_decode(&m, fhsizep) != 0 ||
-		    *fhsizep > NFSX_V3FHMAX ||
-		    *fhsizep <= 0)
-			goto bad;
-	} else
-		*fhsizep = NFSX_V2FH;
-
-	if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
-		goto bad;
-
-	if (args->flags & NFSMNT_NFSV3) {
-		if (xdr_int_decode(&m, &authcount) != 0)
-			goto bad;
-		authunixok = 0;
-		if (authcount < 0 || authcount > 100)
-			goto bad;
-		while (authcount > 0) {
-			if (xdr_int_decode(&m, &authver) != 0)
-				goto bad;
-			if (authver == AUTH_UNIX)
-				authunixok = 1;
-			authcount--;
-		}
-		if (authunixok == 0)
-			goto bad;
-	}
-
-	/* Set port number for NFS use. */
-	error = krpc_portmap(mdsin, NFS_PROG,
-			     (args->flags &
-			      NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
-			     &mdsin->sin_port, td);
-
-	goto out;
-
-bad:
-	error = EBADRPC;
-
-out:
-	m_freem(m);
-	return error;
-}
-
-SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);