getnfsargs.c revision 1.9
1 /* $NetBSD: getnfsargs.c,v 1.9 2007/03/10 00:30:37 hubertf 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\n\ 38 The Regents of the University of California. All rights reserved.\n"); 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 1.9 2007/03/10 00:30:37 hubertf 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 #ifdef ISO 60 #include <netiso/iso.h> 61 #endif 62 63 64 #include <nfs/rpcv2.h> 65 #include <nfs/nfsproto.h> 66 #include <nfs/nfs.h> 67 #include <nfs/nfsmount.h> 68 69 #include <arpa/inet.h> 70 71 #include <err.h> 72 #include <errno.h> 73 #include <fcntl.h> 74 #include <netdb.h> 75 #include <signal.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <unistd.h> 80 #include <util.h> 81 82 #include "mount_nfs.h" 83 84 struct nfhret { 85 u_long stat; 86 long vers; 87 long auth; 88 long fhsize; 89 u_char nfh[NFSX_V3FHMAX]; 90 }; 91 92 static int xdr_dir(XDR *, char *); 93 static int xdr_fh(XDR *, struct nfhret *); 94 95 int 96 getnfsargs(char *spec, struct nfs_args *nfsargsp) 97 { 98 CLIENT *clp; 99 struct addrinfo hints, *ai_nfs, *ai; 100 int ecode; 101 static struct netbuf nfs_nb; 102 static struct sockaddr_storage nfs_ss; 103 struct netconfig *nconf; 104 const char *netid; 105 #ifdef ISO 106 static struct sockaddr_iso isoaddr; 107 struct iso_addr *isop; 108 int isoflag = 0; 109 #endif 110 struct timeval pertry, try; 111 enum clnt_stat clnt_stat; 112 int i, nfsvers, mntvers; 113 int retryleft; 114 char *hostp, *delimp; 115 static struct nfhret nfhret; 116 static char nam[MNAMELEN + 1]; 117 118 strlcpy(nam, spec, sizeof(nam)); 119 if ((delimp = strchr(spec, '@')) != NULL) { 120 hostp = delimp + 1; 121 } else if ((delimp = strrchr(spec, ':')) != NULL) { 122 hostp = spec; 123 spec = delimp + 1; 124 } else { 125 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 126 return (0); 127 } 128 *delimp = '\0'; 129 /* 130 * DUMB!! Until the mount protocol works on iso transport, we must 131 * supply both an iso and an inet address for the host. 132 */ 133 #ifdef ISO 134 if (!strncmp(hostp, "iso=", 4)) { 135 u_short isoport; 136 137 hostp += 4; 138 isoflag++; 139 if ((delimp = strchr(hostp, '+')) == NULL) { 140 warnx("no iso+inet address"); 141 return (0); 142 } 143 *delimp = '\0'; 144 if ((isop = iso_addr(hostp)) == NULL) { 145 warnx("bad ISO address"); 146 return (0); 147 } 148 memset(&isoaddr, 0, sizeof (isoaddr)); 149 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 150 isoaddr.siso_len = sizeof (isoaddr); 151 isoaddr.siso_family = AF_ISO; 152 isoaddr.siso_tlen = 2; 153 isoport = htons(NFS_PORT); 154 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 155 hostp = delimp + 1; 156 } 157 #endif /* ISO */ 158 159 /* 160 * Handle an internet host address. 161 */ 162 memset(&hints, 0, sizeof hints); 163 hints.ai_flags = AI_NUMERICHOST; 164 hints.ai_socktype = nfsargsp->sotype; 165 if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) != 0) { 166 hints.ai_flags = 0; 167 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 168 warnx("can't get net id for host \"%s\": %s", hostp, 169 gai_strerror(ecode)); 170 return (0); 171 } 172 } 173 174 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 175 nfsvers = NFS_VER3; 176 mntvers = RPCMNT_VER3; 177 } else { 178 nfsvers = NFS_VER2; 179 mntvers = RPCMNT_VER1; 180 } 181 nfhret.stat = EACCES; /* Mark not yet successful */ 182 183 for (ai = ai_nfs; ai; ai = ai->ai_next) { 184 /* 185 * XXX. Need a generic (family, type, proto) -> nconf interface. 186 * __rpc_*2nconf exist, maybe they should be exported. 187 */ 188 if (nfsargsp->sotype == SOCK_STREAM) { 189 if (ai->ai_family == AF_INET6) 190 netid = "tcp6"; 191 else 192 netid = "tcp"; 193 } else { 194 if (ai->ai_family == AF_INET6) 195 netid = "udp6"; 196 else 197 netid = "udp"; 198 } 199 200 nconf = getnetconfigent(netid); 201 202 tryagain: 203 retryleft = retrycnt; 204 205 while (retryleft > 0) { 206 nfs_nb.buf = &nfs_ss; 207 nfs_nb.maxlen = sizeof nfs_ss; 208 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)){ 209 if (rpc_createerr.cf_stat == RPC_SYSTEMERROR) { 210 nfhret.stat = rpc_createerr.cf_error.re_errno; 211 break; 212 } 213 if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) { 214 nfhret.stat = EPROTONOSUPPORT; 215 break; 216 } 217 if ((opflags & ISBGRND) == 0) 218 clnt_pcreateerror( 219 "mount_nfs: rpcbind to nfs on server"); 220 } else { 221 pertry.tv_sec = 10; 222 pertry.tv_usec = 0; 223 /* 224 * XXX relies on clnt_tcp_create to bind to a reserved 225 * socket. 226 */ 227 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, 228 mnttcp_ok ? nconf : getnetconfigent("udp")); 229 if (clp == NULL) { 230 if ((opflags & ISBGRND) == 0) { 231 clnt_pcreateerror( 232 "Cannot MNT RPC (mountd)"); 233 } 234 } else { 235 CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT, 236 (char *)&pertry); 237 clp->cl_auth = authsys_create_default(); 238 try.tv_sec = 10; 239 try.tv_usec = 0; 240 nfhret.auth = RPCAUTH_UNIX; 241 nfhret.vers = mntvers; 242 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 243 xdr_dir, spec, xdr_fh, &nfhret, try); 244 switch (clnt_stat) { 245 case RPC_PROGVERSMISMATCH: 246 if (nfsvers == NFS_VER3 && !force3) { 247 nfsvers = NFS_VER2; 248 mntvers = RPCMNT_VER1; 249 nfsargsp->flags &= 250 ~NFSMNT_NFSV3; 251 goto tryagain; 252 } else { 253 errx(1, "%s", clnt_sperror(clp, 254 "MNT RPC")); 255 } 256 case RPC_SUCCESS: 257 auth_destroy(clp->cl_auth); 258 clnt_destroy(clp); 259 retryleft = 0; 260 break; 261 default: 262 /* XXX should give up on some errors */ 263 if ((opflags & ISBGRND) == 0) 264 warnx("%s", clnt_sperror(clp, 265 "bad MNT RPC")); 266 break; 267 } 268 } 269 } 270 if (--retryleft > 0) { 271 if (opflags & BGRND) { 272 opflags &= ~BGRND; 273 if ((i = fork()) != 0) { 274 if (i == -1) 275 err(1, "nqnfs 2"); 276 exit(0); 277 } 278 (void) setsid(); 279 (void) close(STDIN_FILENO); 280 (void) close(STDOUT_FILENO); 281 (void) close(STDERR_FILENO); 282 (void) chdir("/"); 283 opflags |= ISBGRND; 284 } 285 sleep(60); 286 } 287 } 288 if (nfhret.stat == 0) 289 break; 290 } 291 freeaddrinfo(ai_nfs); 292 if (nfhret.stat) { 293 if (opflags & ISBGRND) 294 exit(1); 295 errno = nfhret.stat; 296 warnx("can't access %s: %s", spec, strerror(nfhret.stat)); 297 return (0); 298 } 299 #ifdef ISO 300 if (isoflag) { 301 nfsargsp->addr = (struct sockaddr *) &isoaddr; 302 nfsargsp->addrlen = sizeof (isoaddr); 303 } else 304 #endif /* ISO */ 305 { 306 nfsargsp->addr = (struct sockaddr *) nfs_nb.buf; 307 nfsargsp->addrlen = nfs_nb.len; 308 if (port != 0) { 309 struct sockaddr *sa = nfsargsp->addr; 310 switch (sa->sa_family) { 311 case AF_INET: 312 ((struct sockaddr_in *)sa)->sin_port = port; 313 break; 314 #ifdef INET6 315 case AF_INET6: 316 ((struct sockaddr_in6 *)sa)->sin6_port = port; 317 break; 318 #endif 319 default: 320 errx(1, "Unsupported socket family %d", 321 sa->sa_family); 322 } 323 } 324 } 325 nfsargsp->fh = nfhret.nfh; 326 nfsargsp->fhsize = nfhret.fhsize; 327 nfsargsp->hostname = nam; 328 return (1); 329 } 330 331 /* 332 * xdr routines for mount rpc's 333 */ 334 static int 335 xdr_dir(XDR *xdrsp, char *dirp) 336 { 337 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 338 } 339 340 static int 341 xdr_fh(XDR *xdrsp, struct nfhret *np) 342 { 343 int i; 344 long auth, authcnt, authfnd = 0; 345 346 if (!xdr_u_long(xdrsp, &np->stat)) 347 return (0); 348 if (np->stat) 349 return (1); 350 switch (np->vers) { 351 case 1: 352 np->fhsize = NFSX_V2FH; 353 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 354 case 3: 355 if (!xdr_long(xdrsp, &np->fhsize)) 356 return (0); 357 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 358 return (0); 359 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 360 return (0); 361 if (!xdr_long(xdrsp, &authcnt)) 362 return (0); 363 for (i = 0; i < authcnt; i++) { 364 if (!xdr_long(xdrsp, &auth)) 365 return (0); 366 if (auth == np->auth) 367 authfnd++; 368 } 369 /* 370 * Some servers, such as DEC's OSF/1 return a nil authenticator 371 * list to indicate RPCAUTH_UNIX. 372 */ 373 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 374 np->stat = EAUTH; 375 return (1); 376 }; 377 return (0); 378 } 379
Indexes created Mon Sep 29 21:09:56 GMT 2025