getnfsargs.c revision 1.1
1 /* $NetBSD: getnfsargs.c,v 1.1 2005/05/15 21:18:34 dsl 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 1.1 2005/05/15 21:18:34 dsl 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 #ifdef NFSKERB 64 #include <des.h> 65 #include <kerberosIV/krb.h> 66 #endif 67 68 #include <nfs/rpcv2.h> 69 #include <nfs/nfsproto.h> 70 #include <nfs/nfs.h> 71 #include <nfs/nqnfs.h> 72 #include <nfs/nfsmount.h> 73 74 #include <arpa/inet.h> 75 76 #include <ctype.h> 77 #include <err.h> 78 #include <errno.h> 79 #include <fcntl.h> 80 #include <netdb.h> 81 #include <signal.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <unistd.h> 86 #include <util.h> 87 88 #include "mount_nfs.h" 89 90 struct nfhret { 91 u_long stat; 92 long vers; 93 long auth; 94 long fhsize; 95 u_char nfh[NFSX_V3FHMAX]; 96 }; 97 98 static int xdr_dir(XDR *, char *); 99 static int xdr_fh(XDR *, struct nfhret *); 100 101 int 102 getnfsargs(char *spec, struct nfs_args *nfsargsp) 103 { 104 CLIENT *clp; 105 struct addrinfo hints, *ai_nfs, *ai; 106 int ecode; 107 char host[NI_MAXHOST], serv[NI_MAXSERV]; 108 static struct netbuf nfs_nb; 109 static struct sockaddr_storage nfs_ss; 110 struct netconfig *nconf; 111 const char *netid; 112 #ifdef ISO 113 static struct sockaddr_iso isoaddr; 114 struct iso_addr *isop; 115 int isoflag = 0; 116 #endif 117 struct timeval pertry, try; 118 enum clnt_stat clnt_stat; 119 int i, nfsvers, mntvers, orgcnt; 120 char *hostp, *delimp; 121 #ifdef NFSKERB 122 char *cp; 123 #endif 124 static struct nfhret nfhret; 125 static char nam[MNAMELEN + 1]; 126 127 strncpy(nam, spec, MNAMELEN); 128 nam[MNAMELEN] = '\0'; 129 if ((delimp = strchr(spec, '@')) != NULL) { 130 hostp = delimp + 1; 131 } else if ((delimp = strrchr(spec, ':')) != NULL) { 132 hostp = spec; 133 spec = delimp + 1; 134 } else { 135 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 136 return (0); 137 } 138 *delimp = '\0'; 139 /* 140 * DUMB!! Until the mount protocol works on iso transport, we must 141 * supply both an iso and an inet address for the host. 142 */ 143 #ifdef ISO 144 if (!strncmp(hostp, "iso=", 4)) { 145 u_short isoport; 146 147 hostp += 4; 148 isoflag++; 149 if ((delimp = strchr(hostp, '+')) == NULL) { 150 warnx("no iso+inet address"); 151 return (0); 152 } 153 *delimp = '\0'; 154 if ((isop = iso_addr(hostp)) == NULL) { 155 warnx("bad ISO address"); 156 return (0); 157 } 158 memset(&isoaddr, 0, sizeof (isoaddr)); 159 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 160 isoaddr.siso_len = sizeof (isoaddr); 161 isoaddr.siso_family = AF_ISO; 162 isoaddr.siso_tlen = 2; 163 isoport = htons(NFS_PORT); 164 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 165 hostp = delimp + 1; 166 } 167 #endif /* ISO */ 168 169 /* 170 * Handle an internet host address and reverse resolve it if 171 * doing Kerberos. 172 */ 173 memset(&hints, 0, sizeof hints); 174 hints.ai_flags = AI_NUMERICHOST; 175 hints.ai_socktype = nfsargsp->sotype; 176 if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) == 0) { 177 if ((nfsargsp->flags & NFSMNT_KERB)) { 178 hints.ai_flags = 0; 179 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 180 sizeof host, serv, sizeof serv, 0) != 0) { 181 warnx("can't reverse resolve net address for " 182 "host \"%s\": %s", hostp, 183 gai_strerror(ecode)); 184 return (0); 185 } 186 hostp = host; 187 } 188 } else { 189 hints.ai_flags = 0; 190 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 191 warnx("can't get net id for host \"%s\": %s", hostp, 192 gai_strerror(ecode)); 193 return (0); 194 } 195 } 196 #ifdef NFSKERB 197 if (nfsargsp->flags & NFSMNT_KERB) { 198 strncpy(inst, hp->h_name, INST_SZ); 199 inst[INST_SZ - 1] = '\0'; 200 if (cp = strchr(inst, '.')) 201 *cp = '\0'; 202 } 203 #endif /* NFSKERB */ 204 205 if (force2) { 206 nfsvers = NFS_VER2; 207 mntvers = RPCMNT_VER1; 208 } else { 209 nfsvers = NFS_VER3; 210 mntvers = RPCMNT_VER3; 211 } 212 orgcnt = retrycnt; 213 nfhret.stat = EACCES; /* Mark not yet successful */ 214 215 for (ai = ai_nfs; ai; ai = ai->ai_next) { 216 /* 217 * XXX. Nead a generic (family, type, proto) -> nconf interface. 218 * __rpc_*2nconf exist, maybe they should be exported. 219 */ 220 if (nfsargsp->sotype == SOCK_STREAM) { 221 if (ai->ai_family == AF_INET6) 222 netid = "tcp6"; 223 else 224 netid = "tcp"; 225 } else { 226 if (ai->ai_family == AF_INET6) 227 netid = "udp6"; 228 else 229 netid = "udp"; 230 } 231 232 nconf = getnetconfigent(netid); 233 234 tryagain: 235 retrycnt = orgcnt; 236 237 while (retrycnt > 0) { 238 nfs_nb.buf = &nfs_ss; 239 nfs_nb.maxlen = sizeof nfs_ss; 240 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)){ 241 if (rpc_createerr.cf_stat == RPC_SYSTEMERROR) { 242 nfhret.stat = rpc_createerr.cf_error.re_errno; 243 break; 244 } 245 if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) { 246 nfhret.stat = EPROTONOSUPPORT; 247 break; 248 } 249 if ((opflags & ISBGRND) == 0) 250 clnt_pcreateerror( 251 "mount_nfs: rpcbind to nfs on server"); 252 } else { 253 pertry.tv_sec = 10; 254 pertry.tv_usec = 0; 255 /* 256 * XXX relies on clnt_tcp_create to bind to a reserved 257 * socket. 258 */ 259 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, 260 mnttcp_ok ? nconf : getnetconfigent("udp")); 261 if (clp == NULL) { 262 if ((opflags & ISBGRND) == 0) { 263 clnt_pcreateerror( 264 "Cannot MNT RPC (mountd)"); 265 } 266 } else { 267 CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT, 268 (char *)&pertry); 269 clp->cl_auth = authsys_create_default(); 270 try.tv_sec = 10; 271 try.tv_usec = 0; 272 if (nfsargsp->flags & NFSMNT_KERB) 273 nfhret.auth = RPCAUTH_KERB4; 274 else 275 nfhret.auth = RPCAUTH_UNIX; 276 nfhret.vers = mntvers; 277 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 278 xdr_dir, spec, xdr_fh, &nfhret, try); 279 switch (clnt_stat) { 280 case RPC_PROGVERSMISMATCH: 281 if (nfsvers == NFS_VER3 && !force3) { 282 nfsvers = NFS_VER2; 283 mntvers = RPCMNT_VER1; 284 nfsargsp->flags &= 285 ~NFSMNT_NFSV3; 286 goto tryagain; 287 } else { 288 errx(1, "%s", clnt_sperror(clp, 289 "MNT RPC")); 290 } 291 case RPC_SUCCESS: 292 auth_destroy(clp->cl_auth); 293 clnt_destroy(clp); 294 retrycnt = 0; 295 break; 296 default: 297 /* XXX should give up on some errors */ 298 if ((opflags & ISBGRND) == 0) 299 warnx("%s", clnt_sperror(clp, 300 "bad MNT RPC")); 301 break; 302 } 303 } 304 } 305 if (--retrycnt > 0) { 306 if (opflags & BGRND) { 307 opflags &= ~BGRND; 308 if ((i = fork()) != 0) { 309 if (i == -1) 310 err(1, "nqnfs 2"); 311 exit(0); 312 } 313 (void) setsid(); 314 (void) close(STDIN_FILENO); 315 (void) close(STDOUT_FILENO); 316 (void) close(STDERR_FILENO); 317 (void) chdir("/"); 318 opflags |= ISBGRND; 319 } 320 sleep(60); 321 } 322 } 323 if (nfhret.stat == 0) 324 break; 325 } 326 freeaddrinfo(ai_nfs); 327 if (nfhret.stat) { 328 if (opflags & ISBGRND) 329 exit(1); 330 errno = nfhret.stat; 331 warnx("can't access %s: %s", spec, strerror(nfhret.stat)); 332 return (0); 333 } 334 #ifdef ISO 335 if (isoflag) { 336 nfsargsp->addr = (struct sockaddr *) &isoaddr; 337 nfsargsp->addrlen = sizeof (isoaddr); 338 } else 339 #endif /* ISO */ 340 { 341 nfsargsp->addr = (struct sockaddr *) nfs_nb.buf; 342 nfsargsp->addrlen = nfs_nb.len; 343 if (port != 0) { 344 struct sockaddr *sa = nfsargsp->addr; 345 switch (sa->sa_family) { 346 case AF_INET: 347 ((struct sockaddr_in *)sa)->sin_port = port; 348 #ifdef INET6 349 case AF_INET6: 350 ((struct sockaddr_in6 *)sa)->sin6_port = port; 351 break; 352 #endif 353 default: 354 errx(1, "Unsupported socket family %d", 355 sa->sa_family); 356 } 357 } 358 } 359 nfsargsp->fh = nfhret.nfh; 360 nfsargsp->fhsize = nfhret.fhsize; 361 nfsargsp->hostname = nam; 362 return (1); 363 } 364 365 /* 366 * xdr routines for mount rpc's 367 */ 368 static int 369 xdr_dir(XDR *xdrsp, char *dirp) 370 { 371 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 372 } 373 374 static int 375 xdr_fh(XDR *xdrsp, struct nfhret *np) 376 { 377 int i; 378 long auth, authcnt, authfnd = 0; 379 380 if (!xdr_u_long(xdrsp, &np->stat)) 381 return (0); 382 if (np->stat) 383 return (1); 384 switch (np->vers) { 385 case 1: 386 np->fhsize = NFSX_V2FH; 387 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 388 case 3: 389 if (!xdr_long(xdrsp, &np->fhsize)) 390 return (0); 391 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 392 return (0); 393 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 394 return (0); 395 if (!xdr_long(xdrsp, &authcnt)) 396 return (0); 397 for (i = 0; i < authcnt; i++) { 398 if (!xdr_long(xdrsp, &auth)) 399 return (0); 400 if (auth == np->auth) 401 authfnd++; 402 } 403 /* 404 * Some servers, such as DEC's OSF/1 return a nil authenticator 405 * list to indicate RPCAUTH_UNIX. 406 */ 407 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 408 np->stat = EAUTH; 409 return (1); 410 }; 411 return (0); 412 } 413
Indexes created Tue Sep 30 11:09:46 GMT 2025