getnfsargs.c revision 1.7
1 /* $NetBSD: getnfsargs.c,v 1.7 2006/12/27 12:13:55 yamt 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 1.7 2006/12/27 12:13:55 yamt 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 <ctype.h> 72 #include <err.h> 73 #include <errno.h> 74 #include <fcntl.h> 75 #include <netdb.h> 76 #include <signal.h> 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <string.h> 80 #include <unistd.h> 81 #include <util.h> 82 83 #include "mount_nfs.h" 84 85 struct nfhret { 86 u_long stat; 87 long vers; 88 long auth; 89 long fhsize; 90 u_char nfh[NFSX_V3FHMAX]; 91 }; 92 93 static int xdr_dir(XDR *, char *); 94 static int xdr_fh(XDR *, struct nfhret *); 95 96 int 97 getnfsargs(char *spec, struct nfs_args *nfsargsp) 98 { 99 CLIENT *clp; 100 struct addrinfo hints, *ai_nfs, *ai; 101 int ecode; 102 char host[NI_MAXHOST], serv[NI_MAXSERV]; 103 static struct netbuf nfs_nb; 104 static struct sockaddr_storage nfs_ss; 105 struct netconfig *nconf; 106 const char *netid; 107 #ifdef ISO 108 static struct sockaddr_iso isoaddr; 109 struct iso_addr *isop; 110 int isoflag = 0; 111 #endif 112 struct timeval pertry, try; 113 enum clnt_stat clnt_stat; 114 int i, nfsvers, mntvers; 115 int retryleft; 116 char *hostp, *delimp; 117 static struct nfhret nfhret; 118 static char nam[MNAMELEN + 1]; 119 120 strlcpy(nam, spec, sizeof(nam)); 121 if ((delimp = strchr(spec, '@')) != NULL) { 122 hostp = delimp + 1; 123 } else if ((delimp = strrchr(spec, ':')) != NULL) { 124 hostp = spec; 125 spec = delimp + 1; 126 } else { 127 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 128 return (0); 129 } 130 *delimp = '\0'; 131 /* 132 * DUMB!! Until the mount protocol works on iso transport, we must 133 * supply both an iso and an inet address for the host. 134 */ 135 #ifdef ISO 136 if (!strncmp(hostp, "iso=", 4)) { 137 u_short isoport; 138 139 hostp += 4; 140 isoflag++; 141 if ((delimp = strchr(hostp, '+')) == NULL) { 142 warnx("no iso+inet address"); 143 return (0); 144 } 145 *delimp = '\0'; 146 if ((isop = iso_addr(hostp)) == NULL) { 147 warnx("bad ISO address"); 148 return (0); 149 } 150 memset(&isoaddr, 0, sizeof (isoaddr)); 151 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 152 isoaddr.siso_len = sizeof (isoaddr); 153 isoaddr.siso_family = AF_ISO; 154 isoaddr.siso_tlen = 2; 155 isoport = htons(NFS_PORT); 156 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 157 hostp = delimp + 1; 158 } 159 #endif /* ISO */ 160 161 /* 162 * Handle an internet host address and reverse resolve it if 163 * doing Kerberos. 164 */ 165 memset(&hints, 0, sizeof hints); 166 hints.ai_flags = AI_NUMERICHOST; 167 hints.ai_socktype = nfsargsp->sotype; 168 if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) == 0) { 169 if ((nfsargsp->flags & NFSMNT_KERB)) { 170 hints.ai_flags = 0; 171 if ((ecode = getnameinfo(ai_nfs->ai_addr, 172 ai_nfs->ai_addrlen, host, sizeof(host), 173 serv, sizeof serv, 0)) != 0) { 174 warnx("can't reverse resolve net address for " 175 "host \"%s\": %s", hostp, 176 gai_strerror(ecode)); 177 return (0); 178 } 179 hostp = host; 180 } 181 } else { 182 hints.ai_flags = 0; 183 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 184 warnx("can't get net id for host \"%s\": %s", hostp, 185 gai_strerror(ecode)); 186 return (0); 187 } 188 } 189 190 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 191 nfsvers = NFS_VER3; 192 mntvers = RPCMNT_VER3; 193 } else { 194 nfsvers = NFS_VER2; 195 mntvers = RPCMNT_VER1; 196 } 197 nfhret.stat = EACCES; /* Mark not yet successful */ 198 199 for (ai = ai_nfs; ai; ai = ai->ai_next) { 200 /* 201 * XXX. Nead a generic (family, type, proto) -> nconf interface. 202 * __rpc_*2nconf exist, maybe they should be exported. 203 */ 204 if (nfsargsp->sotype == SOCK_STREAM) { 205 if (ai->ai_family == AF_INET6) 206 netid = "tcp6"; 207 else 208 netid = "tcp"; 209 } else { 210 if (ai->ai_family == AF_INET6) 211 netid = "udp6"; 212 else 213 netid = "udp"; 214 } 215 216 nconf = getnetconfigent(netid); 217 218 tryagain: 219 retryleft = retrycnt; 220 221 while (retryleft > 0) { 222 nfs_nb.buf = &nfs_ss; 223 nfs_nb.maxlen = sizeof nfs_ss; 224 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)){ 225 if (rpc_createerr.cf_stat == RPC_SYSTEMERROR) { 226 nfhret.stat = rpc_createerr.cf_error.re_errno; 227 break; 228 } 229 if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) { 230 nfhret.stat = EPROTONOSUPPORT; 231 break; 232 } 233 if ((opflags & ISBGRND) == 0) 234 clnt_pcreateerror( 235 "mount_nfs: rpcbind to nfs on server"); 236 } else { 237 pertry.tv_sec = 10; 238 pertry.tv_usec = 0; 239 /* 240 * XXX relies on clnt_tcp_create to bind to a reserved 241 * socket. 242 */ 243 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, 244 mnttcp_ok ? nconf : getnetconfigent("udp")); 245 if (clp == NULL) { 246 if ((opflags & ISBGRND) == 0) { 247 clnt_pcreateerror( 248 "Cannot MNT RPC (mountd)"); 249 } 250 } else { 251 CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT, 252 (char *)&pertry); 253 clp->cl_auth = authsys_create_default(); 254 try.tv_sec = 10; 255 try.tv_usec = 0; 256 if (nfsargsp->flags & NFSMNT_KERB) 257 nfhret.auth = RPCAUTH_KERB4; 258 else 259 nfhret.auth = RPCAUTH_UNIX; 260 nfhret.vers = mntvers; 261 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 262 xdr_dir, spec, xdr_fh, &nfhret, try); 263 switch (clnt_stat) { 264 case RPC_PROGVERSMISMATCH: 265 if (nfsvers == NFS_VER3 && !force3) { 266 nfsvers = NFS_VER2; 267 mntvers = RPCMNT_VER1; 268 nfsargsp->flags &= 269 ~NFSMNT_NFSV3; 270 goto tryagain; 271 } else { 272 errx(1, "%s", clnt_sperror(clp, 273 "MNT RPC")); 274 } 275 case RPC_SUCCESS: 276 auth_destroy(clp->cl_auth); 277 clnt_destroy(clp); 278 retryleft = 0; 279 break; 280 default: 281 /* XXX should give up on some errors */ 282 if ((opflags & ISBGRND) == 0) 283 warnx("%s", clnt_sperror(clp, 284 "bad MNT RPC")); 285 break; 286 } 287 } 288 } 289 if (--retryleft > 0) { 290 if (opflags & BGRND) { 291 opflags &= ~BGRND; 292 if ((i = fork()) != 0) { 293 if (i == -1) 294 err(1, "nqnfs 2"); 295 exit(0); 296 } 297 (void) setsid(); 298 (void) close(STDIN_FILENO); 299 (void) close(STDOUT_FILENO); 300 (void) close(STDERR_FILENO); 301 (void) chdir("/"); 302 opflags |= ISBGRND; 303 } 304 sleep(60); 305 } 306 } 307 if (nfhret.stat == 0) 308 break; 309 } 310 freeaddrinfo(ai_nfs); 311 if (nfhret.stat) { 312 if (opflags & ISBGRND) 313 exit(1); 314 errno = nfhret.stat; 315 warnx("can't access %s: %s", spec, strerror(nfhret.stat)); 316 return (0); 317 } 318 #ifdef ISO 319 if (isoflag) { 320 nfsargsp->addr = (struct sockaddr *) &isoaddr; 321 nfsargsp->addrlen = sizeof (isoaddr); 322 } else 323 #endif /* ISO */ 324 { 325 nfsargsp->addr = (struct sockaddr *) nfs_nb.buf; 326 nfsargsp->addrlen = nfs_nb.len; 327 if (port != 0) { 328 struct sockaddr *sa = nfsargsp->addr; 329 switch (sa->sa_family) { 330 case AF_INET: 331 ((struct sockaddr_in *)sa)->sin_port = port; 332 break; 333 #ifdef INET6 334 case AF_INET6: 335 ((struct sockaddr_in6 *)sa)->sin6_port = port; 336 break; 337 #endif 338 default: 339 errx(1, "Unsupported socket family %d", 340 sa->sa_family); 341 } 342 } 343 } 344 nfsargsp->fh = nfhret.nfh; 345 nfsargsp->fhsize = nfhret.fhsize; 346 nfsargsp->hostname = nam; 347 return (1); 348 } 349 350 /* 351 * xdr routines for mount rpc's 352 */ 353 static int 354 xdr_dir(XDR *xdrsp, char *dirp) 355 { 356 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 357 } 358 359 static int 360 xdr_fh(XDR *xdrsp, struct nfhret *np) 361 { 362 int i; 363 long auth, authcnt, authfnd = 0; 364 365 if (!xdr_u_long(xdrsp, &np->stat)) 366 return (0); 367 if (np->stat) 368 return (1); 369 switch (np->vers) { 370 case 1: 371 np->fhsize = NFSX_V2FH; 372 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 373 case 3: 374 if (!xdr_long(xdrsp, &np->fhsize)) 375 return (0); 376 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 377 return (0); 378 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 379 return (0); 380 if (!xdr_long(xdrsp, &authcnt)) 381 return (0); 382 for (i = 0; i < authcnt; i++) { 383 if (!xdr_long(xdrsp, &auth)) 384 return (0); 385 if (auth == np->auth) 386 authfnd++; 387 } 388 /* 389 * Some servers, such as DEC's OSF/1 return a nil authenticator 390 * list to indicate RPCAUTH_UNIX. 391 */ 392 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 393 np->stat = EAUTH; 394 return (1); 395 }; 396 return (0); 397 } 398
Indexes created Fri Oct 03 02:09:57 GMT 2025