getnfsargs.c revision 1.8
1 /* $NetBSD: getnfsargs.c,v 1.8 2006/12/27 12:43:10 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 1.8 2006/12/27 12:43:10 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 static struct netbuf nfs_nb; 103 static struct sockaddr_storage nfs_ss; 104 struct netconfig *nconf; 105 const char *netid; 106 #ifdef ISO 107 static struct sockaddr_iso isoaddr; 108 struct iso_addr *isop; 109 int isoflag = 0; 110 #endif 111 struct timeval pertry, try; 112 enum clnt_stat clnt_stat; 113 int i, nfsvers, mntvers; 114 int retryleft; 115 char *hostp, *delimp; 116 static struct nfhret nfhret; 117 static char nam[MNAMELEN + 1]; 118 119 strlcpy(nam, spec, sizeof(nam)); 120 if ((delimp = strchr(spec, '@')) != NULL) { 121 hostp = delimp + 1; 122 } else if ((delimp = strrchr(spec, ':')) != NULL) { 123 hostp = spec; 124 spec = delimp + 1; 125 } else { 126 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 127 return (0); 128 } 129 *delimp = '\0'; 130 /* 131 * DUMB!! Until the mount protocol works on iso transport, we must 132 * supply both an iso and an inet address for the host. 133 */ 134 #ifdef ISO 135 if (!strncmp(hostp, "iso=", 4)) { 136 u_short isoport; 137 138 hostp += 4; 139 isoflag++; 140 if ((delimp = strchr(hostp, '+')) == NULL) { 141 warnx("no iso+inet address"); 142 return (0); 143 } 144 *delimp = '\0'; 145 if ((isop = iso_addr(hostp)) == NULL) { 146 warnx("bad ISO address"); 147 return (0); 148 } 149 memset(&isoaddr, 0, sizeof (isoaddr)); 150 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 151 isoaddr.siso_len = sizeof (isoaddr); 152 isoaddr.siso_family = AF_ISO; 153 isoaddr.siso_tlen = 2; 154 isoport = htons(NFS_PORT); 155 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 156 hostp = delimp + 1; 157 } 158 #endif /* ISO */ 159 160 /* 161 * Handle an internet host address. 162 */ 163 memset(&hints, 0, sizeof hints); 164 hints.ai_flags = AI_NUMERICHOST; 165 hints.ai_socktype = nfsargsp->sotype; 166 if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) != 0) { 167 hints.ai_flags = 0; 168 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 169 warnx("can't get net id for host \"%s\": %s", hostp, 170 gai_strerror(ecode)); 171 return (0); 172 } 173 } 174 175 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 176 nfsvers = NFS_VER3; 177 mntvers = RPCMNT_VER3; 178 } else { 179 nfsvers = NFS_VER2; 180 mntvers = RPCMNT_VER1; 181 } 182 nfhret.stat = EACCES; /* Mark not yet successful */ 183 184 for (ai = ai_nfs; ai; ai = ai->ai_next) { 185 /* 186 * XXX. Nead a generic (family, type, proto) -> nconf interface. 187 * __rpc_*2nconf exist, maybe they should be exported. 188 */ 189 if (nfsargsp->sotype == SOCK_STREAM) { 190 if (ai->ai_family == AF_INET6) 191 netid = "tcp6"; 192 else 193 netid = "tcp"; 194 } else { 195 if (ai->ai_family == AF_INET6) 196 netid = "udp6"; 197 else 198 netid = "udp"; 199 } 200 201 nconf = getnetconfigent(netid); 202 203 tryagain: 204 retryleft = retrycnt; 205 206 while (retryleft > 0) { 207 nfs_nb.buf = &nfs_ss; 208 nfs_nb.maxlen = sizeof nfs_ss; 209 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)){ 210 if (rpc_createerr.cf_stat == RPC_SYSTEMERROR) { 211 nfhret.stat = rpc_createerr.cf_error.re_errno; 212 break; 213 } 214 if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) { 215 nfhret.stat = EPROTONOSUPPORT; 216 break; 217 } 218 if ((opflags & ISBGRND) == 0) 219 clnt_pcreateerror( 220 "mount_nfs: rpcbind to nfs on server"); 221 } else { 222 pertry.tv_sec = 10; 223 pertry.tv_usec = 0; 224 /* 225 * XXX relies on clnt_tcp_create to bind to a reserved 226 * socket. 227 */ 228 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, 229 mnttcp_ok ? nconf : getnetconfigent("udp")); 230 if (clp == NULL) { 231 if ((opflags & ISBGRND) == 0) { 232 clnt_pcreateerror( 233 "Cannot MNT RPC (mountd)"); 234 } 235 } else { 236 CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT, 237 (char *)&pertry); 238 clp->cl_auth = authsys_create_default(); 239 try.tv_sec = 10; 240 try.tv_usec = 0; 241 nfhret.auth = RPCAUTH_UNIX; 242 nfhret.vers = mntvers; 243 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 244 xdr_dir, spec, xdr_fh, &nfhret, try); 245 switch (clnt_stat) { 246 case RPC_PROGVERSMISMATCH: 247 if (nfsvers == NFS_VER3 && !force3) { 248 nfsvers = NFS_VER2; 249 mntvers = RPCMNT_VER1; 250 nfsargsp->flags &= 251 ~NFSMNT_NFSV3; 252 goto tryagain; 253 } else { 254 errx(1, "%s", clnt_sperror(clp, 255 "MNT RPC")); 256 } 257 case RPC_SUCCESS: 258 auth_destroy(clp->cl_auth); 259 clnt_destroy(clp); 260 retryleft = 0; 261 break; 262 default: 263 /* XXX should give up on some errors */ 264 if ((opflags & ISBGRND) == 0) 265 warnx("%s", clnt_sperror(clp, 266 "bad MNT RPC")); 267 break; 268 } 269 } 270 } 271 if (--retryleft > 0) { 272 if (opflags & BGRND) { 273 opflags &= ~BGRND; 274 if ((i = fork()) != 0) { 275 if (i == -1) 276 err(1, "nqnfs 2"); 277 exit(0); 278 } 279 (void) setsid(); 280 (void) close(STDIN_FILENO); 281 (void) close(STDOUT_FILENO); 282 (void) close(STDERR_FILENO); 283 (void) chdir("/"); 284 opflags |= ISBGRND; 285 } 286 sleep(60); 287 } 288 } 289 if (nfhret.stat == 0) 290 break; 291 } 292 freeaddrinfo(ai_nfs); 293 if (nfhret.stat) { 294 if (opflags & ISBGRND) 295 exit(1); 296 errno = nfhret.stat; 297 warnx("can't access %s: %s", spec, strerror(nfhret.stat)); 298 return (0); 299 } 300 #ifdef ISO 301 if (isoflag) { 302 nfsargsp->addr = (struct sockaddr *) &isoaddr; 303 nfsargsp->addrlen = sizeof (isoaddr); 304 } else 305 #endif /* ISO */ 306 { 307 nfsargsp->addr = (struct sockaddr *) nfs_nb.buf; 308 nfsargsp->addrlen = nfs_nb.len; 309 if (port != 0) { 310 struct sockaddr *sa = nfsargsp->addr; 311 switch (sa->sa_family) { 312 case AF_INET: 313 ((struct sockaddr_in *)sa)->sin_port = port; 314 break; 315 #ifdef INET6 316 case AF_INET6: 317 ((struct sockaddr_in6 *)sa)->sin6_port = port; 318 break; 319 #endif 320 default: 321 errx(1, "Unsupported socket family %d", 322 sa->sa_family); 323 } 324 } 325 } 326 nfsargsp->fh = nfhret.nfh; 327 nfsargsp->fhsize = nfhret.fhsize; 328 nfsargsp->hostname = nam; 329 return (1); 330 } 331 332 /* 333 * xdr routines for mount rpc's 334 */ 335 static int 336 xdr_dir(XDR *xdrsp, char *dirp) 337 { 338 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 339 } 340 341 static int 342 xdr_fh(XDR *xdrsp, struct nfhret *np) 343 { 344 int i; 345 long auth, authcnt, authfnd = 0; 346 347 if (!xdr_u_long(xdrsp, &np->stat)) 348 return (0); 349 if (np->stat) 350 return (1); 351 switch (np->vers) { 352 case 1: 353 np->fhsize = NFSX_V2FH; 354 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 355 case 3: 356 if (!xdr_long(xdrsp, &np->fhsize)) 357 return (0); 358 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 359 return (0); 360 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 361 return (0); 362 if (!xdr_long(xdrsp, &authcnt)) 363 return (0); 364 for (i = 0; i < authcnt; i++) { 365 if (!xdr_long(xdrsp, &auth)) 366 return (0); 367 if (auth == np->auth) 368 authfnd++; 369 } 370 /* 371 * Some servers, such as DEC's OSF/1 return a nil authenticator 372 * list to indicate RPCAUTH_UNIX. 373 */ 374 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 375 np->stat = EAUTH; 376 return (1); 377 }; 378 return (0); 379 } 380
Indexes created Mon Sep 29 21:09:56 GMT 2025