1329 lines
31 KiB
C
1329 lines
31 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (c) 1995 Gordon Ross, Adam Glass
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* Copyright (c) 1992 Regents of the University of California.
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* All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* based on:
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* nfs/krpc_subr.c
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* $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
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*/
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#include "opt_bootp.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sockio.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/uio.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsdiskless.h>
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#include <nfs/krpc.h>
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#include <nfs/xdr_subs.h>
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#define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
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/*
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* What is the longest we will wait before re-sending a request?
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* Note this is also the frequency of "RPC timeout" messages.
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* The re-send loop count sup linearly to this maximum, so the
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* first complaint will happen after (1+2+3+4+5)=15 seconds.
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*/
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#define MAX_RESEND_DELAY 5 /* seconds */
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/* Definitions from RFC951 */
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struct bootp_packet {
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u_int8_t op;
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u_int8_t htype;
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u_int8_t hlen;
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u_int8_t hops;
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u_int32_t xid;
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u_int16_t secs;
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u_int16_t flags;
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struct in_addr ciaddr;
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struct in_addr yiaddr;
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struct in_addr siaddr;
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struct in_addr giaddr;
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unsigned char chaddr[16];
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char sname[64];
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char file[128];
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unsigned char vend[256];
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};
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#define IPPORT_BOOTPC 68
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#define IPPORT_BOOTPS 67
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extern int nfs_diskless_valid;
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extern struct nfsv3_diskless nfsv3_diskless;
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/* mountd RPC */
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static int md_mount(struct sockaddr_in *mdsin, char *path,
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u_char *fhp, int *fhsizep,
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struct nfs_args *args,struct proc *procp);
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static int md_lookup_swap(struct sockaddr_in *mdsin,char *path,
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u_char *fhp, int *fhsizep,
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struct nfs_args *args,
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struct proc *procp);
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static int setfs(struct sockaddr_in *addr, char *path, char *p);
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static int getdec(char **ptr);
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static char *substr(char *a,char *b);
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static void mountopts(struct nfs_args *args, char *p);
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static int xdr_opaque_decode(struct mbuf **ptr, u_char *buf, int len);
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static int xdr_int_decode(struct mbuf **ptr, int *iptr);
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static void printip(char *prefix, struct in_addr addr);
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#ifdef BOOTP_DEBUG
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void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma);
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void bootpboot_p_ma(struct sockaddr *ma);
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void bootpboot_p_rtentry(struct rtentry *rt);
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void bootpboot_p_tree(struct radix_node *rn);
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void bootpboot_p_rtlist(void);
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void bootpboot_p_iflist(void);
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#endif
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static int bootpc_call(struct bootp_packet *call,
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struct bootp_packet *reply,
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struct proc *procp);
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static int bootpc_fakeup_interface(struct ifreq *ireq,
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struct socket *so,
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struct proc *procp);
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static int bootpc_adjust_interface(struct ifreq *ireq,
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struct socket *so,
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struct sockaddr_in *myaddr,
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struct sockaddr_in *netmask,
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struct sockaddr_in *gw,
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struct proc *procp);
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void bootpc_init(void);
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#ifdef BOOTP_DEBUG
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void
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bootpboot_p_sa(struct sockaddr *sa,
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struct sockaddr *ma)
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{
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if (sa == NULL) {
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printf("(sockaddr *) <null>");
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return;
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}
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switch (sa->sa_family) {
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case AF_INET:
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{
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in *) sa;
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printf("inet %x", ntohl(sin->sin_addr.s_addr));
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if (ma != NULL) {
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sin = (struct sockaddr_in *) ma;
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printf(" mask %x", ntohl(sin->sin_addr.s_addr));
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}
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}
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break;
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case AF_LINK:
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{
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struct sockaddr_dl *sli;
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int i;
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sli = (struct sockaddr_dl *) sa;
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printf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
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for (i = 0; i < sli->sdl_alen; i++) {
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if (i > 0)
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printf(":");
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printf("%x", ((unsigned char *) LLADDR(sli))[i]);
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}
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}
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break;
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default:
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printf("af%d", sa->sa_family);
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}
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}
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void
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bootpboot_p_ma(struct sockaddr *ma)
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{
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if (ma == NULL) {
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printf("<null>");
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return;
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}
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printf("%x", *(int *)ma);
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}
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void
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bootpboot_p_rtentry(struct rtentry *rt)
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{
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bootpboot_p_sa(rt_key(rt), rt_mask(rt));
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printf(" ");
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bootpboot_p_ma(rt->rt_genmask);
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printf(" ");
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bootpboot_p_sa(rt->rt_gateway, NULL);
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printf(" ");
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printf("flags %x", (unsigned short) rt->rt_flags);
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printf(" %d", (int) rt->rt_rmx.rmx_expire);
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printf(" %s%d\n", rt->rt_ifp->if_name, rt->rt_ifp->if_unit);
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}
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void
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bootpboot_p_tree(struct radix_node *rn)
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{
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while (rn != NULL) {
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if (rn->rn_bit < 0) {
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if ((rn->rn_flags & RNF_ROOT) != 0) {
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} else {
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bootpboot_p_rtentry((struct rtentry *) rn);
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}
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rn = rn->rn_dupedkey;
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} else {
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bootpboot_p_tree(rn->rn_left);
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bootpboot_p_tree(rn->rn_right);
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return;
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}
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}
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}
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void
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bootpboot_p_rtlist(void)
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{
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printf("Routing table:\n");
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bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
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}
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void
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bootpboot_p_iflist(void)
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{
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struct ifnet *ifp;
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struct ifaddr *ifa;
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printf("Interface list:\n");
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for (ifp = TAILQ_FIRST(&ifnet);
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ifp != NULL;
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ifp = TAILQ_NEXT(ifp,if_link)) {
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for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
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ifa != NULL;
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ifa = TAILQ_NEXT(ifa,ifa_link))
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if (ifa->ifa_addr->sa_family == AF_INET) {
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printf("%s%d flags %x, addr %x, bcast %x, net %x\n",
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ifp->if_name, ifp->if_unit,
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(unsigned short) ifp->if_flags,
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ntohl(((struct sockaddr_in *) ifa->ifa_addr)->sin_addr.s_addr),
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ntohl(((struct sockaddr_in *) ifa->ifa_dstaddr)->sin_addr.s_addr),
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ntohl(((struct sockaddr_in *) ifa->ifa_netmask)->sin_addr.s_addr)
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);
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}
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}
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}
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#endif
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static int
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bootpc_call(struct bootp_packet *call,
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struct bootp_packet *reply, /* output */
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struct proc *procp)
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{
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struct socket *so;
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struct sockaddr_in *sin, sa;
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struct uio auio;
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struct sockopt sopt;
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struct iovec aio;
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struct timeval tv;
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int error, on, len, rcvflg, secs, timo;
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/*
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* Create socket and set its recieve timeout.
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*/
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if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)))
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goto out;
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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bzero(&sopt, sizeof sopt);
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sopt.sopt_level = SOL_SOCKET;
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sopt.sopt_name = SO_RCVTIMEO;
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sopt.sopt_val = &tv;
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sopt.sopt_valsize = sizeof tv;
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if ((error = sosetopt(so, &sopt)) != 0)
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goto out;
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/*
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* Enable broadcast.
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*/
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on = 1;
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sopt.sopt_val = &on;
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sopt.sopt_valsize = sizeof on;
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sopt.sopt_name = SO_BROADCAST;
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if ((error = sosetopt(so, &sopt)) != 0)
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goto out;
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/*
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* Bind the local endpoint to a bootp client port.
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*/
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sin = &sa;
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bzero(sin, sizeof *sin);
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_ANY;
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sin->sin_port = htons(IPPORT_BOOTPC);
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error = sobind(so, (struct sockaddr *)sin, procp);
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if (error) {
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printf("bind failed\n");
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goto out;
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}
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/*
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* Setup socket address for the server.
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*/
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sin = &sa;
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bzero(sin, sizeof *sin);
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_BROADCAST;
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sin->sin_port = htons(IPPORT_BOOTPS);
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/*
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* Send it, repeatedly, until a reply is received,
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* but delay each re-send by an increasing amount.
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* If the delay hits the maximum, start complaining.
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*/
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timo = 0;
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for (;;) {
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/* Send BOOTP request (or re-send). */
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aio.iov_base = (caddr_t) call;
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aio.iov_len = sizeof(*call);
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auio.uio_iov = &aio;
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auio.uio_iovcnt = 1;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_rw = UIO_WRITE;
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auio.uio_offset = 0;
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auio.uio_resid = sizeof(*call);
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auio.uio_procp = procp;
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error = sosend(so, (struct sockaddr *)sin, &auio, NULL,
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NULL, 0, procp);
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if (error) {
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printf("bootpc_call: sosend: %d state %08x\n",
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error, (int)so->so_state);
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goto out;
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}
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/* Determine new timeout. */
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if (timo < MAX_RESEND_DELAY)
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timo++;
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else
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printf("BOOTP timeout for server 0x%lx\n",
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(u_long)ntohl(sin->sin_addr.s_addr));
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/*
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* Wait for up to timo seconds for a reply.
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* The socket receive timeout was set to 1 second.
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*/
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secs = timo;
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while (secs > 0) {
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aio.iov_base = (caddr_t) reply;
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aio.iov_len = sizeof(*reply);
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auio.uio_iov = &aio;
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auio.uio_iovcnt = 1;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_rw = UIO_READ;
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auio.uio_offset = 0;
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auio.uio_resid = sizeof(*reply);
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auio.uio_procp = procp;
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rcvflg = 0;
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error = soreceive(so, NULL, &auio,
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NULL, NULL, &rcvflg);
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if (error == EWOULDBLOCK) {
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secs--;
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call->secs = htons(ntohs(call->secs) + 1);
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continue;
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}
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if (error)
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goto out;
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len = sizeof(*reply) - auio.uio_resid;
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/* Do we have the required number of bytes ? */
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if (len < BOOTP_MIN_LEN)
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continue;
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/* Is it the right reply? */
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if (reply->op != 2)
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continue;
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if (reply->xid != call->xid)
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continue;
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if (reply->hlen != call->hlen)
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continue;
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if (bcmp(reply->chaddr,call->chaddr,call->hlen))
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continue;
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goto gotreply; /* break two levels */
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} /* while secs */
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} /* forever send/receive */
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error = ETIMEDOUT;
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goto out;
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gotreply:
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out:
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soclose(so);
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return error;
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}
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static int
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bootpc_fakeup_interface(struct ifreq *ireq,
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struct socket *so,
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struct proc *procp)
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{
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struct sockaddr_in *sin;
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int error;
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struct sockaddr_in dst;
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struct sockaddr_in gw;
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struct sockaddr_in mask;
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/*
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* Bring up the interface.
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*
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* Get the old interface flags and or IFF_UP into them; if
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* IFF_UP set blindly, interface selection can be clobbered.
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*/
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error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, procp);
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if (error)
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panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
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ireq->ifr_flags |= IFF_UP;
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error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, procp);
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if (error)
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panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
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/*
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* Do enough of ifconfig(8) so that the chosen interface
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* can talk to the servers. (just set the address)
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*/
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/* addr is 0.0.0.0 */
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sin = (struct sockaddr_in *)&ireq->ifr_addr;
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bzero((caddr_t)sin, sizeof(*sin));
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_ANY;
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error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
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if (error)
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panic("bootpc_fakeup_interface: set if addr, error=%d", error);
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/* netmask is 0.0.0.0 */
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sin = (struct sockaddr_in *)&ireq->ifr_addr;
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bzero((caddr_t)sin, sizeof(*sin));
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_ANY;
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error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, procp);
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if (error)
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panic("bootpc_fakeup_interface: set if net addr, error=%d", error);
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/* Broadcast is 255.255.255.255 */
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sin = (struct sockaddr_in *)&ireq->ifr_addr;
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bzero((caddr_t)sin, sizeof(*sin));
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_BROADCAST;
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error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
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if (error)
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panic("bootpc_fakeup_interface: set if broadcast addr, error=%d", error);
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/* Add default route to 0.0.0.0 so we can send data */
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bzero((caddr_t) &dst, sizeof(dst));
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dst.sin_len = sizeof(dst);
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dst.sin_family = AF_INET;
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dst.sin_addr.s_addr = htonl(0);
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bzero((caddr_t) &gw, sizeof(gw));
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gw.sin_len = sizeof(gw);
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gw.sin_family = AF_INET;
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gw.sin_addr.s_addr = htonl(0x0);
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|
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bzero((caddr_t) &mask, sizeof(mask));
|
|
mask.sin_len = sizeof(mask);
|
|
mask.sin_family = AF_INET;
|
|
mask.sin_addr.s_addr = htonl(0);
|
|
|
|
error = rtrequest(RTM_ADD,
|
|
(struct sockaddr *) &dst,
|
|
(struct sockaddr *) &gw,
|
|
(struct sockaddr *) &mask,
|
|
RTF_UP | RTF_STATIC
|
|
, NULL);
|
|
if (error)
|
|
printf("bootpc_fakeup_interface: add default route, error=%d\n", error);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
bootpc_adjust_interface(struct ifreq *ireq,struct socket *so,
|
|
struct sockaddr_in *myaddr,
|
|
struct sockaddr_in *netmask,
|
|
struct sockaddr_in *gw,
|
|
struct proc *procp)
|
|
{
|
|
int error;
|
|
struct sockaddr_in oldgw;
|
|
struct sockaddr_in olddst;
|
|
struct sockaddr_in oldmask;
|
|
struct sockaddr_in *sin;
|
|
|
|
/* Remove old default route to 0.0.0.0 */
|
|
|
|
bzero((caddr_t) &olddst, sizeof(olddst));
|
|
olddst.sin_len = sizeof(olddst);
|
|
olddst.sin_family = AF_INET;
|
|
olddst.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
bzero((caddr_t) &oldgw, sizeof(oldgw));
|
|
oldgw.sin_len = sizeof(oldgw);
|
|
oldgw.sin_family = AF_INET;
|
|
oldgw.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
bzero((caddr_t) &oldmask, sizeof(oldmask));
|
|
oldmask.sin_len = sizeof(oldmask);
|
|
oldmask.sin_family = AF_INET;
|
|
oldmask.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
error = rtrequest(RTM_DELETE,
|
|
(struct sockaddr *) &olddst,
|
|
(struct sockaddr *) &oldgw,
|
|
(struct sockaddr *) &oldmask,
|
|
(RTF_UP | RTF_STATIC), NULL);
|
|
if (error != 0) {
|
|
printf("nfs_boot: del default route, error=%d\n", error);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* 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, procp);
|
|
if (error != 0)
|
|
panic("nfs_boot: set if netmask, error=%d", error);
|
|
|
|
/* Broadcast is with host part of IP address all 1's */
|
|
|
|
sin = (struct sockaddr_in *)&ireq->ifr_addr;
|
|
bzero((caddr_t)sin, sizeof(*sin));
|
|
sin->sin_len = sizeof(*sin);
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_addr.s_addr = myaddr->sin_addr.s_addr |
|
|
~ netmask->sin_addr.s_addr;
|
|
error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
|
|
if (error != 0)
|
|
panic("bootpc_call: set if broadcast addr, error=%d", error);
|
|
|
|
bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr));
|
|
error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
|
|
if (error != 0)
|
|
panic("nfs_boot: set if addr, error=%d", error);
|
|
|
|
/* Add new default route */
|
|
|
|
error = rtrequest(RTM_ADD,
|
|
(struct sockaddr *) &olddst,
|
|
(struct sockaddr *) gw,
|
|
(struct sockaddr *) &oldmask,
|
|
(RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL);
|
|
if (error != 0) {
|
|
printf("nfs_boot: add net route, error=%d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
setfs(struct sockaddr_in *addr, char *path, char *p)
|
|
{
|
|
unsigned int ip;
|
|
int val;
|
|
|
|
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;
|
|
if (*p != ':')
|
|
return 0;
|
|
p++;
|
|
|
|
addr->sin_addr.s_addr = htonl(ip);
|
|
addr->sin_len = sizeof(struct sockaddr_in);
|
|
addr->sin_family = AF_INET;
|
|
|
|
strncpy(path, p, MNAMELEN - 1);
|
|
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 char *
|
|
substr(char *a, char *b)
|
|
{
|
|
char *loc1;
|
|
char *loc2;
|
|
|
|
while (*a != '\0') {
|
|
loc1 = a;
|
|
loc2 = b;
|
|
while (*loc1 == *loc2++) {
|
|
if (*loc1 == '\0')
|
|
return 0;
|
|
loc1++;
|
|
if (*loc2 == '\0')
|
|
return loc1;
|
|
}
|
|
a++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
mountopts(struct nfs_args *args, char *p)
|
|
{
|
|
char *tmp;
|
|
|
|
args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
|
|
args->sotype = SOCK_DGRAM;
|
|
if ((tmp = (char *)substr(p, "rsize=")))
|
|
args->rsize = getdec(&tmp);
|
|
if ((tmp = (char *)substr(p, "wsize=")))
|
|
args->wsize = getdec(&tmp);
|
|
if ((tmp = (char *)substr(p, "intr")))
|
|
args->flags |= NFSMNT_INT;
|
|
if ((tmp = (char *)substr(p, "soft")))
|
|
args->flags |= NFSMNT_SOFT;
|
|
if ((tmp = (char *)substr(p, "noconn")))
|
|
args->flags |= NFSMNT_NOCONN;
|
|
if ((tmp = (char *)substr(p, "tcp")))
|
|
args->sotype = SOCK_STREAM;
|
|
}
|
|
|
|
|
|
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
|
|
printip(char *prefix, struct in_addr addr)
|
|
{
|
|
unsigned int ip;
|
|
|
|
ip = ntohl(addr.s_addr);
|
|
|
|
printf("%s is %d.%d.%d.%d\n", prefix,
|
|
ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
|
|
}
|
|
|
|
|
|
void
|
|
bootpc_init(void)
|
|
{
|
|
struct bootp_packet call;
|
|
struct bootp_packet reply;
|
|
static u_int32_t xid = ~0xFF;
|
|
|
|
struct ifreq ireq;
|
|
struct ifnet *ifp;
|
|
struct socket *so;
|
|
int error;
|
|
int code,ncode,len;
|
|
int j;
|
|
char *p;
|
|
unsigned int ip;
|
|
|
|
struct sockaddr_in myaddr;
|
|
struct sockaddr_in netmask;
|
|
struct sockaddr_in gw;
|
|
int gotgw;
|
|
int gotnetmask;
|
|
int gotrootpath;
|
|
int gotswappath;
|
|
char lookup_path[24];
|
|
|
|
#define EALEN 6
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_dl *sdl;
|
|
char *delim;
|
|
|
|
struct nfsv3_diskless *nd;
|
|
struct proc *procp;
|
|
|
|
gotgw = 0;
|
|
gotnetmask = 0;
|
|
gotrootpath = 0;
|
|
gotswappath = 0;
|
|
sdl = NULL;
|
|
nd = &nfsv3_diskless;
|
|
procp = curproc;
|
|
|
|
/*
|
|
* If already filled in, don't touch it here
|
|
*/
|
|
if (nfs_diskless_valid != 0)
|
|
return;
|
|
|
|
/*
|
|
* Wait until arp entries can be handled.
|
|
*/
|
|
while (time_second == 0)
|
|
tsleep(&time_second, PZERO + 8, "arpkludge", 10);
|
|
|
|
/*
|
|
* Find a network interface.
|
|
*/
|
|
#ifdef BOOTP_WIRED_TO
|
|
printf("bootpc_init: wired to interface '%s'\n",
|
|
__XSTRING(BOOTP_WIRED_TO));
|
|
#endif
|
|
bzero(&ireq, sizeof(ireq));
|
|
for (ifp = TAILQ_FIRST(&ifnet);
|
|
ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp,if_link))
|
|
{
|
|
snprintf(ireq.ifr_name, sizeof(ireq.ifr_name),
|
|
"%s%d", ifp->if_name, ifp->if_unit);
|
|
#ifdef BOOTP_WIRED_TO
|
|
if (strcmp(ireq.ifr_name, __XSTRING(BOOTP_WIRED_TO)) == 0)
|
|
break;
|
|
#else
|
|
if ((ifp->if_flags &
|
|
(IFF_LOOPBACK | IFF_POINTOPOINT)) == 0)
|
|
break;
|
|
#endif
|
|
}
|
|
if (ifp == NULL)
|
|
panic("bootpc_init: no suitable interface");
|
|
strcpy(nd->myif.ifra_name, ireq.ifr_name);
|
|
printf("bootpc_init: using network interface '%s'\n",
|
|
ireq.ifr_name);
|
|
|
|
if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0, procp)) != 0)
|
|
panic("nfs_boot: socreate, error=%d", error);
|
|
|
|
bootpc_fakeup_interface(&ireq, so, procp);
|
|
|
|
printf("Bootpc testing starting\n");
|
|
|
|
/* Get HW address */
|
|
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
|
|
ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa,ifa_link))
|
|
if (ifa->ifa_addr->sa_family == AF_LINK &&
|
|
(sdl = ((struct sockaddr_dl *) ifa->ifa_addr)) &&
|
|
sdl->sdl_type == IFT_ETHER)
|
|
break;
|
|
|
|
if (sdl == NULL)
|
|
panic("bootpc: Unable to find HW address");
|
|
if (sdl->sdl_alen != EALEN)
|
|
panic("bootpc: HW address len is %d, expected value is %d",
|
|
sdl->sdl_alen, EALEN);
|
|
|
|
printf("bootpc hw address is ");
|
|
delim = "";
|
|
for (j = 0; j < sdl->sdl_alen; j++) {
|
|
printf("%s%x",delim,((unsigned char *)LLADDR(sdl))[j]);
|
|
delim = ":";
|
|
}
|
|
printf("\n");
|
|
|
|
#if 0
|
|
bootpboot_p_iflist();
|
|
bootpboot_p_rtlist();
|
|
#endif
|
|
|
|
bzero((caddr_t) &call, sizeof(call));
|
|
|
|
/* bootpc part */
|
|
call.op = 1; /* BOOTREQUEST */
|
|
call.htype = 1; /* 10mb ethernet */
|
|
call.hlen = sdl->sdl_alen; /* Hardware address length */
|
|
call.hops = 0;
|
|
xid++;
|
|
call.xid = txdr_unsigned(xid);
|
|
bcopy(LLADDR(sdl), &call.chaddr, sdl->sdl_alen);
|
|
|
|
j = 0;
|
|
call.vend[j++] = 99;
|
|
call.vend[j++] = 130;
|
|
call.vend[j++] = 83;
|
|
call.vend[j++] = 99;
|
|
|
|
/*
|
|
* We send an RFC 1533 "Maximum DHCP Message Size" option, saying we
|
|
* can do 1200 bytes. If we don't ISC DHCPD will limit the answer to
|
|
* 64 bytes and root/swap and similar will be dropped.
|
|
*/
|
|
call.vend[j++] = 57;
|
|
call.vend[j++] = 2;
|
|
call.vend[j++] = 1200 / 256;
|
|
call.vend[j++] = 1200 % 256;
|
|
|
|
call.vend[j++] = 255;
|
|
|
|
call.secs = 0;
|
|
call.flags = htons(0x8000); /* We need an broadcast answer */
|
|
|
|
error = bootpc_call(&call, &reply, procp);
|
|
|
|
if (error != 0) {
|
|
#ifdef BOOTP_NFSROOT
|
|
panic("BOOTP call failed");
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
bzero(&myaddr, sizeof(myaddr));
|
|
bzero(&netmask, sizeof(netmask));
|
|
bzero(&gw, sizeof(gw));
|
|
|
|
myaddr.sin_len = sizeof(myaddr);
|
|
myaddr.sin_family = AF_INET;
|
|
|
|
netmask.sin_len = sizeof(netmask);
|
|
netmask.sin_family = AF_INET;
|
|
|
|
gw.sin_len = sizeof(gw);
|
|
gw.sin_family = AF_INET;
|
|
|
|
nd->root_args.version = NFS_ARGSVERSION;
|
|
nd->root_args.rsize = 8192;
|
|
nd->root_args.wsize = 8192;
|
|
nd->root_args.sotype = SOCK_DGRAM;
|
|
nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
|
|
|
|
nd->swap_saddr.sin_len = sizeof(gw);
|
|
nd->swap_saddr.sin_family = AF_INET;
|
|
|
|
nd->swap_args.version = NFS_ARGSVERSION;
|
|
nd->swap_args.rsize = 8192;
|
|
nd->swap_args.wsize = 8192;
|
|
nd->swap_args.sotype = SOCK_DGRAM;
|
|
nd->swap_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
|
|
|
|
myaddr.sin_addr = reply.yiaddr;
|
|
|
|
ip = ntohl(myaddr.sin_addr.s_addr);
|
|
snprintf(lookup_path, sizeof(lookup_path), "swap.%d.%d.%d.%d",
|
|
ip >> 24, (ip >> 16) & 255 ,(ip >> 8) & 255 ,ip & 255);
|
|
|
|
printip("My ip address", myaddr.sin_addr);
|
|
|
|
printip("Server ip address", reply.siaddr);
|
|
|
|
gw.sin_addr = reply.giaddr;
|
|
printip("Gateway ip address", reply.giaddr);
|
|
|
|
if (reply.sname[0] != '\0')
|
|
printf("Server name is %s\n", reply.sname);
|
|
if (reply.file[0] != '\0')
|
|
printf("boot file is %s\n", reply.file);
|
|
if (reply.vend[0] == 99 && reply.vend[1] == 130 &&
|
|
reply.vend[2] == 83 && reply.vend[3] == 99) {
|
|
j = 4;
|
|
ncode = reply.vend[j];
|
|
while (j < sizeof(reply.vend)) {
|
|
code = reply.vend[j] = ncode;
|
|
if (code == 255)
|
|
break;
|
|
if (code == 0) {
|
|
j++;
|
|
continue;
|
|
}
|
|
len = reply.vend[j + 1];
|
|
j += 2;
|
|
if (len + j >= sizeof(reply.vend)) {
|
|
printf("Truncated field");
|
|
break;
|
|
}
|
|
ncode = reply.vend[j + len];
|
|
reply.vend[j + len] = '\0';
|
|
p = &reply.vend[j];
|
|
switch (code) {
|
|
case 1:
|
|
if (len != 4)
|
|
panic("bootpc: subnet mask len is %d",
|
|
len);
|
|
bcopy(&reply.vend[j], &netmask.sin_addr, 4);
|
|
gotnetmask = 1;
|
|
printip("Subnet mask", netmask.sin_addr);
|
|
break;
|
|
case 6: /* Domain Name servers. Unused */
|
|
case 16: /* Swap server IP address. unused */
|
|
case 2:
|
|
/* Time offset */
|
|
break;
|
|
case 3:
|
|
/* Routers */
|
|
if (len % 4)
|
|
panic("bootpc: Router Len is %d", len);
|
|
if (len > 0) {
|
|
bcopy(&reply.vend[j], &gw.sin_addr, 4);
|
|
printip("Router", gw.sin_addr);
|
|
gotgw = 1;
|
|
}
|
|
break;
|
|
case 17:
|
|
if (setfs(&nd->root_saddr,
|
|
nd->root_hostnam, p)) {
|
|
printf("rootfs is %s\n", p);
|
|
gotrootpath = 1;
|
|
} else
|
|
panic("Failed to set rootfs to %s", p);
|
|
break;
|
|
case 12:
|
|
if (len >= MAXHOSTNAMELEN)
|
|
panic("bootpc: hostname >=%d bytes",
|
|
MAXHOSTNAMELEN);
|
|
strncpy(nd->my_hostnam, &reply.vend[j], len);
|
|
nd->my_hostnam[len] = 0;
|
|
strncpy(hostname, &reply.vend[j], len);
|
|
hostname[len] = 0;
|
|
printf("Hostname is %s\n", hostname);
|
|
break;
|
|
case 128:
|
|
if (setfs(&nd->swap_saddr,
|
|
nd->swap_hostnam, p)) {
|
|
gotswappath = 1;
|
|
printf("swapfs is %s\n", p);
|
|
} else
|
|
panic("Failed to set swapfs to %s", p);
|
|
break;
|
|
case 129:
|
|
{
|
|
int swaplen;
|
|
if (len != 4)
|
|
panic("bootpc: Expected 4 bytes for swaplen, not %d bytes",len);
|
|
bcopy(&reply.vend[j], &swaplen, 4);
|
|
nd->swap_nblks = ntohl(swaplen);
|
|
printf("bootpc: Swap size is %d KB\n",
|
|
nd->swap_nblks);
|
|
}
|
|
break;
|
|
case 130: /* root mount options */
|
|
mountopts(&nd->root_args, p);
|
|
break;
|
|
case 131: /* swap mount options */
|
|
mountopts(&nd->swap_args, p);
|
|
break;
|
|
default:
|
|
printf("Ignoring field type %d\n",code);
|
|
}
|
|
j += len;
|
|
}
|
|
}
|
|
|
|
if (gotswappath == 0)
|
|
nd->swap_nblks = 0;
|
|
#ifdef BOOTP_NFSROOT
|
|
if (gotrootpath == 0)
|
|
panic("bootpc: No root path offered");
|
|
#endif
|
|
|
|
if (gotnetmask == 0) {
|
|
if (IN_CLASSA(ntohl(myaddr.sin_addr.s_addr)))
|
|
netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
|
|
else if (IN_CLASSB(ntohl(myaddr.sin_addr.s_addr)))
|
|
netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
|
|
else
|
|
netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
|
|
}
|
|
if (gotgw == 0) {
|
|
/* Use proxyarp */
|
|
gw.sin_addr.s_addr = myaddr.sin_addr.s_addr;
|
|
}
|
|
|
|
#if 0
|
|
bootpboot_p_iflist();
|
|
bootpboot_p_rtlist();
|
|
#endif
|
|
error = bootpc_adjust_interface(&ireq, so,
|
|
&myaddr, &netmask, &gw, procp);
|
|
|
|
soclose(so);
|
|
|
|
#if 0
|
|
bootpboot_p_iflist();
|
|
bootpboot_p_rtlist();
|
|
#endif
|
|
|
|
if (gotrootpath != 0) {
|
|
|
|
error = md_mount(&nd->root_saddr, nd->root_hostnam,
|
|
nd->root_fh, &nd->root_fhsize,
|
|
&nd->root_args, procp);
|
|
if (error != 0)
|
|
panic("nfs_boot: mountd root, error=%d", error);
|
|
|
|
if (gotswappath != 0) {
|
|
|
|
error = md_mount(&nd->swap_saddr,
|
|
nd->swap_hostnam,
|
|
nd->swap_fh, &nd->swap_fhsize,
|
|
&nd->swap_args, procp);
|
|
if (error != 0)
|
|
panic("nfs_boot: mountd swap, error=%d",
|
|
error);
|
|
|
|
error = md_lookup_swap(&nd->swap_saddr,
|
|
lookup_path,
|
|
nd->swap_fh, &nd->swap_fhsize,
|
|
&nd->swap_args, procp);
|
|
if (error != 0)
|
|
panic("nfs_boot: lookup swap, error=%d",
|
|
error);
|
|
}
|
|
nfs_diskless_valid = 3;
|
|
}
|
|
|
|
|
|
bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
|
|
bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
|
|
((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
|
|
myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
|
|
bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
|
|
|
|
#if 0
|
|
bootpboot_p_iflist();
|
|
bootpboot_p_rtlist();
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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, /* mountd server address */
|
|
char *path,
|
|
u_char *fhp,
|
|
int *fhsizep,
|
|
struct nfs_args *args,
|
|
struct proc *procp)
|
|
{
|
|
struct mbuf *m;
|
|
int error;
|
|
int authunixok;
|
|
int authcount;
|
|
int authver;
|
|
|
|
#ifdef BOOTP_NFSV3
|
|
/* First try NFS v3 */
|
|
/* Get port number for MOUNTD. */
|
|
error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
|
|
&mdsin->sin_port, procp);
|
|
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, procp);
|
|
}
|
|
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, procp);
|
|
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, procp);
|
|
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 == RPCAUTH_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, procp);
|
|
|
|
goto out;
|
|
|
|
bad:
|
|
error = EBADRPC;
|
|
|
|
out:
|
|
m_freem(m);
|
|
return error;
|
|
}
|
|
|
|
|
|
static int
|
|
md_lookup_swap(struct sockaddr_in *mdsin, /* mountd server address */
|
|
char *path,
|
|
u_char *fhp,
|
|
int *fhsizep,
|
|
struct nfs_args *args,
|
|
struct proc *procp)
|
|
{
|
|
struct mbuf *m;
|
|
int error;
|
|
int size = -1;
|
|
int attribs_present;
|
|
int status;
|
|
union {
|
|
u_int32_t v2[17];
|
|
u_int32_t v3[21];
|
|
} fattribs;
|
|
|
|
m = m_get(M_WAIT,MT_DATA);
|
|
if (m == NULL)
|
|
return ENOBUFS;
|
|
|
|
if ((args->flags & NFSMNT_NFSV3) != 0) {
|
|
*mtod(m, u_int32_t *) = txdr_unsigned(*fhsizep);
|
|
bcopy(fhp, mtod(m, u_char *) + sizeof(u_int32_t), *fhsizep);
|
|
m->m_len = *fhsizep + sizeof(u_int32_t);
|
|
} else {
|
|
bcopy(fhp, mtod(m, u_char *), NFSX_V2FH);
|
|
m->m_len = NFSX_V2FH;
|
|
}
|
|
|
|
m->m_next = xdr_string_encode(path, strlen(path));
|
|
if (m->m_next == NULL) {
|
|
error = ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
/* Do RPC to nfsd. */
|
|
if ((args->flags & NFSMNT_NFSV3) != 0)
|
|
error = krpc_call(mdsin, NFS_PROG, NFS_VER3,
|
|
NFSPROC_LOOKUP, &m, NULL, procp);
|
|
else
|
|
error = krpc_call(mdsin, NFS_PROG, NFS_VER2,
|
|
NFSV2PROC_LOOKUP, &m, NULL, procp);
|
|
if (error != 0)
|
|
return error; /* message already freed */
|
|
|
|
if (xdr_int_decode(&m, &status) != 0)
|
|
goto bad;
|
|
if (status != 0) {
|
|
error = ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
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) != 0) {
|
|
if (xdr_int_decode(&m, &attribs_present) != 0)
|
|
goto bad;
|
|
if (attribs_present != 0) {
|
|
if (xdr_opaque_decode(&m, (u_char *) &fattribs.v3,
|
|
sizeof(u_int32_t) * 21) != 0)
|
|
goto bad;
|
|
size = fxdr_unsigned(u_int32_t, fattribs.v3[6]);
|
|
}
|
|
} else {
|
|
if (xdr_opaque_decode(&m,(u_char *) &fattribs.v2,
|
|
sizeof(u_int32_t) * 17) != 0)
|
|
goto bad;
|
|
size = fxdr_unsigned(u_int32_t, fattribs.v2[5]);
|
|
}
|
|
|
|
if (nfsv3_diskless.swap_nblks == 0 && size != -1) {
|
|
nfsv3_diskless.swap_nblks = size / 1024;
|
|
printf("md_lookup_swap: Swap size is %d KB\n",
|
|
nfsv3_diskless.swap_nblks);
|
|
}
|
|
|
|
goto out;
|
|
|
|
bad:
|
|
error = EBADRPC;
|
|
|
|
out:
|
|
m_freem(m);
|
|
return error;
|
|
}
|