252 lines
6.9 KiB
C
252 lines
6.9 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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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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* 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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* from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/malloc.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/ethernet.h>
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#include <netinet/in.h>
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#include <rpc/rpcclnt.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsclient/nfs.h>
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#include <nfsclient/nfsdiskless.h>
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static int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa);
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static int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa);
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static int decode_nfshandle(char *ev, u_char *fh);
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/*
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* Populate the essential fields in the nfsv3_diskless structure.
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*
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* The loader is expected to export the following environment variables:
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*
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* boot.netif.name name of boot interface
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* boot.netif.ip IP address on boot interface
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* boot.netif.netmask netmask on boot interface
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* boot.netif.gateway default gateway (optional)
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* boot.netif.hwaddr hardware address of boot interface
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* boot.nfsroot.server IP address of root filesystem server
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* boot.nfsroot.path path of the root filesystem on server
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* boot.nfsroot.nfshandle NFS handle for root filesystem on server
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*/
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void
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nfs_setup_diskless(void)
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{
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struct nfs_diskless *nd = &nfs_diskless;
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struct ifnet *ifp;
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struct ifaddr *ifa;
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struct sockaddr_dl *sdl, ourdl;
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struct sockaddr_in myaddr, netmask;
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char *cp;
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if (nfs_diskless_valid)
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return;
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/* set up interface */
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if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
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return;
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if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
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printf("nfs_diskless: no netmask\n");
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return;
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}
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bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
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bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
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((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
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myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
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bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
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if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
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printf("nfs_diskless: no hardware address\n");
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return;
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}
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ifa = NULL;
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IFNET_RLOCK();
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TAILQ_FOREACH(ifp, &ifnet, if_link) {
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TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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if ((ifa->ifa_addr->sa_family == AF_LINK) &&
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(sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
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if ((sdl->sdl_type == ourdl.sdl_type) &&
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(sdl->sdl_alen == ourdl.sdl_alen) &&
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!bcmp(sdl->sdl_data + sdl->sdl_nlen,
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ourdl.sdl_data + ourdl.sdl_nlen,
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sdl->sdl_alen)) {
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IFNET_RUNLOCK();
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goto match_done;
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}
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}
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}
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}
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IFNET_RUNLOCK();
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printf("nfs_diskless: no interface\n");
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return; /* no matching interface */
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match_done:
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setenv("boot.netif.name", ifp->if_xname);
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strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
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/* set up gateway */
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inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
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/* set up root mount */
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nd->root_args.rsize = 8192; /* XXX tunable? */
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nd->root_args.wsize = 8192;
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nd->root_args.sotype = SOCK_DGRAM;
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nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
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if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
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printf("nfs_diskless: no server\n");
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return;
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}
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nd->root_saddr.sin_port = htons(NFS_PORT);
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if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
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printf("nfs_diskless: no NFS handle\n");
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return;
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}
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if ((cp = getenv("boot.nfsroot.path")) != NULL) {
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strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
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freeenv(cp);
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}
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nfs_diskless_valid = 1;
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}
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static int
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inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
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{
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u_int32_t a[4];
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char *cp;
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int count;
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bzero(sa, sizeof(*sa));
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sa->sin_len = sizeof(*sa);
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sa->sin_family = AF_INET;
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if ((cp = getenv(ev)) == NULL)
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return (1);
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count = sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]);
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freeenv(cp);
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if (count != 4)
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return (1);
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sa->sin_addr.s_addr =
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htonl((a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]);
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return (0);
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}
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static int
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hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
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{
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char *cp;
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u_int32_t a[6];
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int count;
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bzero(sa, sizeof(*sa));
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sa->sdl_len = sizeof(*sa);
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sa->sdl_family = AF_LINK;
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sa->sdl_type = IFT_ETHER;
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sa->sdl_alen = ETHER_ADDR_LEN;
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if ((cp = getenv(ev)) == NULL)
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return (1);
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count = sscanf(cp, "%x:%x:%x:%x:%x:%x",
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&a[0], &a[1], &a[2], &a[3], &a[4], &a[5]);
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freeenv(cp);
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if (count != 6)
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return (1);
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sa->sdl_data[0] = a[0];
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sa->sdl_data[1] = a[1];
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sa->sdl_data[2] = a[2];
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sa->sdl_data[3] = a[3];
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sa->sdl_data[4] = a[4];
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sa->sdl_data[5] = a[5];
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return (0);
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}
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static int
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decode_nfshandle(char *ev, u_char *fh)
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{
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u_char *cp, *ep;
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int len, val;
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ep = cp = getenv(ev);
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if (cp == NULL)
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return (0);
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if ((strlen(cp) < 2) || (*cp != 'X')) {
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freeenv(ep);
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return (0);
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}
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len = 0;
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cp++;
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for (;;) {
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if (*cp == 'X') {
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freeenv(ep);
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return (len);
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}
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if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) {
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freeenv(ep);
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return (0);
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}
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*(fh++) = val;
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len++;
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cp += 2;
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if (len > NFSX_V2FH) {
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freeenv(ep);
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return (0);
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}
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}
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}
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#if !defined(BOOTP_NFSROOT)
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static void
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nfs_rootconf(void)
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{
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nfs_setup_diskless();
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if (nfs_diskless_valid)
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rootdevnames[0] = "nfs:";
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}
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SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, nfs_rootconf, NULL)
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#endif
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