/* $NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $ */
/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David Laight.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* Copyright (c) 1993 John Brezak
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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.
*/
/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* 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. 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.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <syslog.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsmount.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "mount_nfs.h"
#include "iodesc.h"
typedef int32_t n_long;
#include "rpc.h"
#define RPC_HEADER_WORDS 28 /* more than enough */
#define FNAME_SIZE 512
struct nfhret {
long fhsize;
u_char nfh[NFSX_V3FHMAX];
};
int retrycnt = DEF_RETRY;
int opflags = 0;
int force2 = 0;
int force3 = 0;
int mnttcp_ok = 1;
int port = 0;
/* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */
static int
nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret)
{
size_t len;
struct args {
uint32_t len;
char path[FNAME_SIZE];
} *args;
struct repl {
uint32_t errval;
u_char fh[NFSX_V3FHMAX];
} *repl;
struct {
uint32_t h[RPC_HEADER_WORDS];
struct args d;
} sdata;
struct {
uint32_t h[RPC_HEADER_WORDS];
struct repl d;
} rdata;
ssize_t cc;
args = &sdata.d;
repl = &rdata.d;
memset(args, 0, sizeof(*args));
len = strlen(path);
if (len > sizeof(args->path))
len = sizeof(args->path);
args->len = htonl(len);
memcpy(args->path, path, len);
len = 4 + roundup(len, 4);
cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT,
args, len, repl, sizeof(*repl));
if (cc == -1) {
/* errno was set by rpc_call */
return errno;
}
if (cc < 4)
return EBADRPC;
if (repl->errval)
return ntohl(repl->errval);
nfhret->fhsize = cc;
memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh));
return 0;
}
int
getnfsargs(char *spec, struct nfs_args *nfsargsp)
{
struct addrinfo hints, *ai_nfs;
int ecode;
int nfsvers, mntvers;
char *hostp, *delimp;
static struct nfhret nfhret;
static char nam[MNAMELEN + 1];
struct iodesc d;
int nfs_port;
strlcpy(nam, spec, sizeof(nam));
if ((delimp = strchr(spec, '@')) != NULL) {
hostp = delimp + 1;
} else if ((delimp = strrchr(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else {
warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
return 0;
}
*delimp = '\0';
memset(&hints, 0, sizeof hints);
hints.ai_socktype = nfsargsp->sotype;
if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) {
warnx("can't get net id for host \"%s\": %s", hostp,
gai_strerror(ecode));
return 0;
}
if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) {
nfsvers = NFS_VER3;
mntvers = RPCMNT_VER3;
} else {
nfsvers = NFS_VER2;
mntvers = RPCMNT_VER1;
}
d.socket = -1;
for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) {
if (d.ai == NULL) {
if (nfsvers == NFS_VER3 && !force3) {
nfsvers = NFS_VER2;
mntvers = RPCMNT_VER1;
d.ai = ai_nfs;
continue;
}
return 0;
}
nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers);
if (nfs_port == -1)
continue;
if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0)
break;
}
if (port != 0)
nfs_port = port;
set_port(d.ai->ai_addr, htons(nfs_port));
nfsargsp->hostname = nam;
nfsargsp->addr = d.ai->ai_addr;
nfsargsp->addrlen = d.ai->ai_addrlen;
nfsargsp->fh = nfhret.nfh;
if (nfsvers == NFS_VER3) {
nfsargsp->fhsize = be32dec(nfhret.nfh);
nfsargsp->fh += sizeof(uint32_t);
} else {
nfsargsp->fhsize = NFSX_V2FH;
nfsargsp->flags &= ~NFSMNT_NFSV3;
}
return 1;
}