getnfsargs.c revision 1.15
1 /* $NetBSD: getnfsargs.c,v 1.15 2013/03/01 18:25:17 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\ 38 The Regents of the University of California. All rights reserved."); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95"; 44 #else 45 __RCSID("$NetBSD: getnfsargs.c,v 1.15 2013/03/01 18:25:17 joerg Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/mount.h> 51 #include <sys/socket.h> 52 #include <sys/stat.h> 53 #include <syslog.h> 54 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 59 #include <nfs/rpcv2.h> 60 #include <nfs/nfsproto.h> 61 #include <nfs/nfs.h> 62 #include <nfs/nfsmount.h> 63 64 #include <arpa/inet.h> 65 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #include <netdb.h> 70 #include <signal.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <unistd.h> 75 #include <util.h> 76 77 #include "mount_nfs.h" 78 79 struct nfhret { 80 u_long stat; 81 long vers; 82 long auth; 83 long fhsize; 84 u_char nfh[NFSX_V3FHMAX]; 85 }; 86 87 static int xdr_dir(XDR *, char *); 88 static int xdr_fh(XDR *, struct nfhret *); 89 90 #ifndef MOUNTNFS_RETRYRPC 91 #define MOUNTNFS_RETRYRPC 60 92 #endif 93 94 int 95 getnfsargs(char *spec, struct nfs_args *nfsargsp) 96 { 97 CLIENT *clp; 98 struct addrinfo hints, *ai_nfs, *ai; 99 int ecode; 100 static struct netbuf nfs_nb; 101 static struct sockaddr_storage nfs_ss; 102 struct netconfig *nconf; 103 const char *netid; 104 struct timeval pertry, try; 105 enum clnt_stat clnt_stat; 106 int i, nfsvers, mntvers; 107 int retryleft; 108 char *hostp, *delimp; 109 static struct nfhret nfhret; 110 static char nam[MNAMELEN + 1]; 111 112 strlcpy(nam, spec, sizeof(nam)); 113 if ((delimp = strchr(spec, '@')) != NULL) { 114 hostp = delimp + 1; 115 } else if ((delimp = strrchr(spec, ':')) != NULL) { 116 hostp = spec; 117 spec = delimp + 1; 118 } else { 119 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 120 return (0); 121 } 122 *delimp = '\0'; 123 124 /* 125 * Handle an internet host address. 126 */ 127 memset(&hints, 0, sizeof hints); 128 hints.ai_flags = AI_NUMERICHOST; 129 hints.ai_socktype = nfsargsp->sotype; 130 if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) != 0) { 131 hints.ai_flags = 0; 132 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 133 warnx("can't get net id for host \"%s\": %s", hostp, 134 gai_strerror(ecode)); 135 return (0); 136 } 137 } 138 139 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 140 nfsvers = NFS_VER3; 141 mntvers = RPCMNT_VER3; 142 } else { 143 nfsvers = NFS_VER2; 144 mntvers = RPCMNT_VER1; 145 } 146 nfhret.stat = EACCES; /* Mark not yet successful */ 147 148 for (ai = ai_nfs; ai; ai = ai->ai_next) { 149 /* 150 * XXX. Need a generic (family, type, proto) -> nconf interface. 151 * __rpc_*2nconf exist, maybe they should be exported. 152 */ 153 if (nfsargsp->sotype == SOCK_STREAM) { 154 if (ai->ai_family == AF_INET6) 155 netid = "tcp6"; 156 else 157 netid = "tcp"; 158 } else { 159 if (ai->ai_family == AF_INET6) 160 netid = "udp6"; 161 else 162 netid = "udp"; 163 } 164 165 nconf = getnetconfigent(netid); 166 167 tryagain: 168 retryleft = retrycnt; 169 170 while (retryleft > 0) { 171 nfs_nb.buf = &nfs_ss; 172 nfs_nb.maxlen = sizeof nfs_ss; 173 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)){ 174 if (rpc_createerr.cf_stat == RPC_SYSTEMERROR) { 175 nfhret.stat = rpc_createerr.cf_error.re_errno; 176 break; 177 } 178 if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) { 179 nfhret.stat = EPROTONOSUPPORT; 180 break; 181 } 182 if ((opflags & ISBGRND) == 0) { 183 char buf[64]; 184 185 snprintf(buf, sizeof(buf), 186 "%s: rpcbind to nfs on server", 187 getprogname()); 188 clnt_pcreateerror(buf); 189 } 190 } else { 191 pertry.tv_sec = 30; 192 pertry.tv_usec = 0; 193 /* 194 * XXX relies on clnt_tcp_create to bind to a reserved 195 * socket. 196 */ 197 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, 198 mnttcp_ok ? nconf : getnetconfigent("udp")); 199 if (clp == NULL) { 200 if ((opflags & ISBGRND) == 0) { 201 clnt_pcreateerror( 202 "Cannot MNT RPC (mountd)"); 203 } 204 } else { 205 CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT, 206 (char *)&pertry); 207 clp->cl_auth = authsys_create_default(); 208 try.tv_sec = 30; 209 try.tv_usec = 0; 210 nfhret.auth = RPCAUTH_UNIX; 211 nfhret.vers = mntvers; 212 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 213 xdr_dir, spec, xdr_fh, &nfhret, try); 214 switch (clnt_stat) { 215 case RPC_PROGVERSMISMATCH: 216 if (nfsvers == NFS_VER3 && !force3) { 217 nfsvers = NFS_VER2; 218 mntvers = RPCMNT_VER1; 219 nfsargsp->flags &= 220 ~NFSMNT_NFSV3; 221 goto tryagain; 222 } else { 223 errx(1, "%s", clnt_sperror(clp, 224 "MNT RPC")); 225 } 226 case RPC_SUCCESS: 227 auth_destroy(clp->cl_auth); 228 clnt_destroy(clp); 229 retryleft = 0; 230 break; 231 default: 232 /* XXX should give up on some errors */ 233 if ((opflags & ISBGRND) == 0) 234 warnx("%s", clnt_sperror(clp, 235 "bad MNT RPC")); 236 break; 237 } 238 } 239 } 240 if (--retryleft > 0) { 241 if (opflags & BGRND) { 242 opflags &= ~BGRND; 243 if ((i = fork()) != 0) { 244 if (i == -1) 245 err(1, "fork"); 246 exit(0); 247 } 248 (void) setsid(); 249 (void) close(STDIN_FILENO); 250 (void) close(STDOUT_FILENO); 251 (void) close(STDERR_FILENO); 252 (void) chdir("/"); 253 opflags |= ISBGRND; 254 } 255 sleep(MOUNTNFS_RETRYRPC); 256 } 257 } 258 if (nfhret.stat == 0) 259 break; 260 } 261 freeaddrinfo(ai_nfs); 262 if (nfhret.stat) { 263 if (opflags & ISBGRND) 264 exit(1); 265 errno = nfhret.stat; 266 warnx("can't access %s: %s", spec, strerror(nfhret.stat)); 267 return (0); 268 } else { 269 nfsargsp->addr = (struct sockaddr *) nfs_nb.buf; 270 nfsargsp->addrlen = nfs_nb.len; 271 if (port != 0) { 272 struct sockaddr *sa = nfsargsp->addr; 273 switch (sa->sa_family) { 274 case AF_INET: 275 ((struct sockaddr_in *)sa)->sin_port = port; 276 break; 277 #ifdef INET6 278 case AF_INET6: 279 ((struct sockaddr_in6 *)sa)->sin6_port = port; 280 break; 281 #endif 282 default: 283 errx(1, "Unsupported socket family %d", 284 sa->sa_family); 285 } 286 } 287 } 288 nfsargsp->fh = nfhret.nfh; 289 nfsargsp->fhsize = nfhret.fhsize; 290 nfsargsp->hostname = nam; 291 return (1); 292 } 293 294 /* 295 * xdr routines for mount rpc's 296 */ 297 static int 298 xdr_dir(XDR *xdrsp, char *dirp) 299 { 300 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 301 } 302 303 static int 304 xdr_fh(XDR *xdrsp, struct nfhret *np) 305 { 306 int i; 307 long auth, authcnt, authfnd = 0; 308 309 if (!xdr_u_long(xdrsp, &np->stat)) 310 return (0); 311 if (np->stat) 312 return (1); 313 switch (np->vers) { 314 case 1: 315 np->fhsize = NFSX_V2FH; 316 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 317 case 3: 318 if (!xdr_long(xdrsp, &np->fhsize)) 319 return (0); 320 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 321 return (0); 322 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 323 return (0); 324 if (!xdr_long(xdrsp, &authcnt)) 325 return (0); 326 for (i = 0; i < authcnt; i++) { 327 if (!xdr_long(xdrsp, &auth)) 328 return (0); 329 if (auth == np->auth) 330 authfnd++; 331 } 332 /* 333 * Some servers, such as DEC's OSF/1 return a nil authenticator 334 * list to indicate RPCAUTH_UNIX. 335 */ 336 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 337 np->stat = EAUTH; 338 return (1); 339 }; 340 return (0); 341 } 342
Indexes created Mon Sep 29 21:09:56 GMT 2025