376f839026
backslash as nothing, treat it like a space so that adjacent lines aren't glued together. PR: 8479 Submitted by: Adrian Filipi-Martin <adrian@ubergeeks.com>
2472 lines
56 KiB
C
2472 lines
56 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Herb Hasler and Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /*not lint*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /*not lint*/
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/syslog.h>
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#include <sys/sysctl.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#include <rpcsvc/mount.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <ufs/ufs/ufsmount.h>
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#include <fs/msdosfs/msdosfsmount.h>
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#include <fs/ntfs/ntfsmount.h>
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#include <isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <grp.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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#ifdef DEBUG
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#include <stdarg.h>
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#endif
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#ifndef MOUNTDLOCK
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#define MOUNTDLOCK "/var/run/mountd.lock"
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#endif
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/*
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* Structures for keeping the mount list and export list
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*/
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struct mountlist {
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struct mountlist *ml_next;
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char ml_host[RPCMNT_NAMELEN+1];
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char ml_dirp[RPCMNT_PATHLEN+1];
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};
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struct dirlist {
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struct dirlist *dp_left;
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struct dirlist *dp_right;
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int dp_flag;
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struct hostlist *dp_hosts; /* List of hosts this dir exported to */
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char dp_dirp[1]; /* Actually malloc'd to size of dir */
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};
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/* dp_flag bits */
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#define DP_DEFSET 0x1
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#define DP_HOSTSET 0x2
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#define DP_KERB 0x4
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struct exportlist {
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struct exportlist *ex_next;
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struct dirlist *ex_dirl;
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struct dirlist *ex_defdir;
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int ex_flag;
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fsid_t ex_fs;
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char *ex_fsdir;
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char *ex_indexfile;
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};
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/* ex_flag bits */
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#define EX_LINKED 0x1
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struct netmsk {
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struct sockaddr_storage nt_net;
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struct sockaddr_storage nt_mask;
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char *nt_name;
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};
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union grouptypes {
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struct addrinfo *gt_addrinfo;
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struct netmsk gt_net;
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};
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struct grouplist {
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int gr_type;
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union grouptypes gr_ptr;
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struct grouplist *gr_next;
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};
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/* Group types */
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#define GT_NULL 0x0
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#define GT_HOST 0x1
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#define GT_NET 0x2
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#define GT_DEFAULT 0x3
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#define GT_IGNORE 0x5
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struct hostlist {
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int ht_flag; /* Uses DP_xx bits */
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struct grouplist *ht_grp;
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struct hostlist *ht_next;
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};
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struct fhreturn {
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int fhr_flag;
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int fhr_vers;
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nfsfh_t fhr_fh;
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};
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/* Global defs */
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char *add_expdir __P((struct dirlist **, char *, int));
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void add_dlist __P((struct dirlist **, struct dirlist *,
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struct grouplist *, int));
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void add_mlist __P((char *, char *));
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int check_dirpath __P((char *));
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int check_options __P((struct dirlist *));
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int checkmask(struct sockaddr *sa);
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int chk_host __P((struct dirlist *, struct sockaddr *, int *, int *));
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void del_mlist(char *hostp, char *dirp);
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struct dirlist *dirp_search __P((struct dirlist *, char *));
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int do_mount __P((struct exportlist *, struct grouplist *, int,
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struct xucred *, char *, int, struct statfs *));
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int do_opt __P((char **, char **, struct exportlist *, struct grouplist *,
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int *, int *, struct xucred *));
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struct exportlist *ex_search __P((fsid_t *));
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struct exportlist *get_exp __P((void));
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void free_dir __P((struct dirlist *));
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void free_exp __P((struct exportlist *));
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void free_grp __P((struct grouplist *));
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void free_host __P((struct hostlist *));
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void get_exportlist __P((void));
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int get_host __P((char *, struct grouplist *, struct grouplist *));
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struct hostlist *get_ht __P((void));
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int get_line __P((void));
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void get_mountlist __P((void));
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int get_net __P((char *, struct netmsk *, int));
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void getexp_err __P((struct exportlist *, struct grouplist *));
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struct grouplist *get_grp __P((void));
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void hang_dirp __P((struct dirlist *, struct grouplist *,
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struct exportlist *, int));
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void huphandler(int sig);
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int makemask(struct sockaddr_storage *ssp, int bitlen);
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void mntsrv __P((struct svc_req *, SVCXPRT *));
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void nextfield __P((char **, char **));
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void out_of_mem __P((void));
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void parsecred __P((char *, struct xucred *));
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int put_exlist __P((struct dirlist *, XDR *, struct dirlist *, int *));
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void *sa_rawaddr(struct sockaddr *sa, int *nbytes);
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int sacmp(struct sockaddr *sa1, struct sockaddr *sa2,
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struct sockaddr *samask);
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int scan_tree __P((struct dirlist *, struct sockaddr *));
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static void usage __P((void));
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int xdr_dir __P((XDR *, char *));
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int xdr_explist __P((XDR *, caddr_t));
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int xdr_fhs __P((XDR *, caddr_t));
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int xdr_mlist __P((XDR *, caddr_t));
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void terminate __P((int));
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struct exportlist *exphead;
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struct mountlist *mlhead;
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struct grouplist *grphead;
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char exname[MAXPATHLEN];
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struct xucred def_anon = {
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0,
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(uid_t)-2,
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1,
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{ (gid_t)-2 },
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NULL
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};
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int force_v2 = 0;
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int resvport_only = 1;
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int dir_only = 1;
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int log = 0;
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int got_sighup = 0;
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int opt_flags;
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static int have_v6 = 1;
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#ifdef NI_WITHSCOPEID
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static const int ninumeric = NI_NUMERICHOST | NI_WITHSCOPEID;
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#else
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static const int ninumeric = NI_NUMERICHOST;
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#endif
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int mountdlockfd;
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/* Bits for opt_flags above */
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#define OP_MAPROOT 0x01
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#define OP_MAPALL 0x02
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#define OP_KERB 0x04
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#define OP_MASK 0x08
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#define OP_NET 0x10
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#define OP_ALLDIRS 0x40
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#define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */
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#define OP_MASKLEN 0x200
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#ifdef DEBUG
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int debug = 1;
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void SYSLOG __P((int, const char *, ...));
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#define syslog SYSLOG
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#else
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int debug = 0;
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#endif
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/*
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* Mountd server for NFS mount protocol as described in:
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* NFS: Network File System Protocol Specification, RFC1094, Appendix A
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* The optional arguments are the exports file name
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* default: _PATH_EXPORTS
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* and "-n" to allow nonroot mount.
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*/
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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fd_set readfds;
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SVCXPRT *udptransp, *tcptransp, *udp6transp, *tcp6transp;
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struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf;
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int udpsock, tcpsock, udp6sock, tcp6sock;
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int xcreated = 0, s;
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int one = 1;
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int c, error, mib[3];
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struct vfsconf vfc;
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udp6conf = tcp6conf = NULL;
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udp6sock = tcp6sock = NULL;
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/* Check that another mountd isn't already running. */
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if ((mountdlockfd = (open(MOUNTDLOCK, O_RDONLY|O_CREAT, 0444))) == -1)
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err(1, "%s", MOUNTDLOCK);
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if(flock(mountdlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
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errx(1, "another rpc.mountd is already running. Aborting");
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s < 0)
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have_v6 = 0;
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else
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close(s);
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error = getvfsbyname("nfs", &vfc);
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if (error && vfsisloadable("nfs")) {
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if(vfsload("nfs"))
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err(1, "vfsload(nfs)");
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endvfsent(); /* flush cache */
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error = getvfsbyname("nfs", &vfc);
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}
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if (error)
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errx(1, "NFS support is not available in the running kernel");
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while ((c = getopt(argc, argv, "2dlnr")) != -1)
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switch (c) {
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case '2':
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force_v2 = 1;
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break;
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case 'n':
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resvport_only = 0;
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break;
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case 'r':
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dir_only = 0;
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break;
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case 'd':
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debug = debug ? 0 : 1;
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break;
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case 'l':
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log = 1;
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break;
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default:
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usage();
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};
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argc -= optind;
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argv += optind;
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grphead = (struct grouplist *)NULL;
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exphead = (struct exportlist *)NULL;
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mlhead = (struct mountlist *)NULL;
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if (argc == 1) {
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strncpy(exname, *argv, MAXPATHLEN-1);
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exname[MAXPATHLEN-1] = '\0';
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} else
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strcpy(exname, _PATH_EXPORTS);
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openlog("mountd", LOG_PID, LOG_DAEMON);
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if (debug)
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warnx("getting export list");
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get_exportlist();
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if (debug)
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warnx("getting mount list");
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get_mountlist();
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if (debug)
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warnx("here we go");
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if (debug == 0) {
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daemon(0, 0);
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signal(SIGINT, SIG_IGN);
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signal(SIGQUIT, SIG_IGN);
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}
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signal(SIGHUP, huphandler);
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signal(SIGTERM, terminate);
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{ FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
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if (pidfile != NULL) {
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fprintf(pidfile, "%d\n", getpid());
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fclose(pidfile);
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}
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}
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rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
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rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
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udpsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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tcpsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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udpconf = getnetconfigent("udp");
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tcpconf = getnetconfigent("tcp");
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if (!have_v6)
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goto skip_v6;
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udp6sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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tcp6sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
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/*
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* We're doing host-based access checks here, so don't allow
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* v4-in-v6 to confuse things. The kernel will disable it
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* by default on NFS sockets too.
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*/
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if (udp6sock != -1 && setsockopt(udp6sock, IPPROTO_IPV6,
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IPV6_BINDV6ONLY, &one, sizeof one) < 0){
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syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
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exit(1);
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}
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if (tcp6sock != -1 && setsockopt(tcp6sock, IPPROTO_IPV6,
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IPV6_BINDV6ONLY, &one, sizeof one) < 0){
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syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
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exit(1);
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}
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udp6conf = getnetconfigent("udp6");
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tcp6conf = getnetconfigent("tcp6");
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skip_v6:
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if (!resvport_only) {
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mib[0] = CTL_VFS;
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mib[1] = vfc.vfc_typenum;
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mib[2] = NFS_NFSPRIVPORT;
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if (sysctl(mib, 3, NULL, NULL, &resvport_only,
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sizeof(resvport_only)) != 0 && errno != ENOENT) {
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syslog(LOG_ERR, "sysctl: %m");
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exit(1);
|
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}
|
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}
|
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if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL ||
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(tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) {
|
|
syslog(LOG_ERR, "can't create socket");
|
|
exit(1);
|
|
}
|
|
if (udpsock != -1 && udpconf != NULL) {
|
|
bindresvport(udpsock, NULL);
|
|
udptransp = svc_dg_create(udpsock, 0, 0);
|
|
if (udptransp != NULL) {
|
|
if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER1,
|
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mntsrv, udpconf))
|
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syslog(LOG_WARNING, "can't register UDP RPCMNT_VER1 service");
|
|
else
|
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xcreated++;
|
|
if (!force_v2) {
|
|
if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER3,
|
|
mntsrv, udpconf))
|
|
syslog(LOG_WARNING, "can't register UDP RPCMNT_VER3 service");
|
|
else
|
|
xcreated++;
|
|
}
|
|
} else
|
|
syslog(LOG_WARNING, "can't create UDP services");
|
|
|
|
}
|
|
if (tcpsock != -1 && tcpconf != NULL) {
|
|
bindresvport(tcpsock, NULL);
|
|
listen(tcpsock, SOMAXCONN);
|
|
tcptransp = svc_vc_create(tcpsock, 0, 0);
|
|
if (tcptransp != NULL) {
|
|
if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER1,
|
|
mntsrv, tcpconf))
|
|
syslog(LOG_WARNING, "can't register TCP RPCMNT_VER1 service");
|
|
else
|
|
xcreated++;
|
|
if (!force_v2) {
|
|
if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER3,
|
|
mntsrv, tcpconf))
|
|
syslog(LOG_WARNING, "can't register TCP RPCMNT_VER3 service");
|
|
else
|
|
xcreated++;
|
|
}
|
|
} else
|
|
syslog(LOG_WARNING, "can't create TCP service");
|
|
|
|
}
|
|
if (have_v6 && udp6sock != -1 && udp6conf != NULL) {
|
|
bindresvport(udp6sock, NULL);
|
|
udp6transp = svc_dg_create(udp6sock, 0, 0);
|
|
if (udp6transp != NULL) {
|
|
if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER1,
|
|
mntsrv, udp6conf))
|
|
syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER1 service");
|
|
else
|
|
xcreated++;
|
|
if (!force_v2) {
|
|
if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER3,
|
|
mntsrv, udp6conf))
|
|
syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER3 service");
|
|
else
|
|
xcreated++;
|
|
}
|
|
} else
|
|
syslog(LOG_WARNING, "can't create UDP6 service");
|
|
|
|
}
|
|
if (have_v6 && tcp6sock != -1 && tcp6conf != NULL) {
|
|
bindresvport(tcp6sock, NULL);
|
|
listen(tcp6sock, SOMAXCONN);
|
|
tcp6transp = svc_vc_create(tcp6sock, 0, 0);
|
|
if (tcp6transp != NULL) {
|
|
if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER1,
|
|
mntsrv, tcp6conf))
|
|
syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER1 service");
|
|
else
|
|
xcreated++;
|
|
if (!force_v2) {
|
|
if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER3,
|
|
mntsrv, tcp6conf))
|
|
syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER3 service");
|
|
else
|
|
xcreated++;
|
|
}
|
|
} else
|
|
syslog(LOG_WARNING, "can't create TCP6 service");
|
|
|
|
}
|
|
if (xcreated == 0) {
|
|
syslog(LOG_ERR, "could not create any services");
|
|
exit(1);
|
|
}
|
|
|
|
/* Expand svc_run() here so that we can call get_exportlist(). */
|
|
for (;;) {
|
|
if (got_sighup) {
|
|
get_exportlist();
|
|
got_sighup = 0;
|
|
}
|
|
readfds = svc_fdset;
|
|
switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
|
|
case -1:
|
|
if (errno == EINTR)
|
|
continue;
|
|
syslog(LOG_ERR, "mountd died: select: %m");
|
|
exit(1);
|
|
case 0:
|
|
continue;
|
|
default:
|
|
svc_getreqset(&readfds);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
fprintf(stderr,
|
|
"usage: mountd [-2] [-d] [-l] [-n] [-r] [export_file]\n");
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* The mount rpc service
|
|
*/
|
|
void
|
|
mntsrv(rqstp, transp)
|
|
struct svc_req *rqstp;
|
|
SVCXPRT *transp;
|
|
{
|
|
struct exportlist *ep;
|
|
struct dirlist *dp;
|
|
struct fhreturn fhr;
|
|
struct stat stb;
|
|
struct statfs fsb;
|
|
struct addrinfo *ai;
|
|
char host[NI_MAXHOST], numerichost[NI_MAXHOST];
|
|
int lookup_failed = 1;
|
|
struct sockaddr *saddr;
|
|
u_short sport;
|
|
char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
|
|
int bad = 0, defset, hostset;
|
|
sigset_t sighup_mask;
|
|
|
|
sigemptyset(&sighup_mask);
|
|
sigaddset(&sighup_mask, SIGHUP);
|
|
saddr = svc_getrpccaller(transp)->buf;
|
|
switch (saddr->sa_family) {
|
|
case AF_INET6:
|
|
sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
|
|
break;
|
|
case AF_INET:
|
|
sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
|
|
break;
|
|
default:
|
|
syslog(LOG_ERR, "request from unknown address family");
|
|
return;
|
|
}
|
|
lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
|
|
NULL, 0, 0);
|
|
getnameinfo(saddr, saddr->sa_len, numerichost,
|
|
sizeof numerichost, NULL, 0, NI_NUMERICHOST);
|
|
ai = NULL;
|
|
switch (rqstp->rq_proc) {
|
|
case NULLPROC:
|
|
if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
return;
|
|
case RPCMNT_MOUNT:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"mount request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_getargs(transp, xdr_dir, rpcpath)) {
|
|
syslog(LOG_NOTICE, "undecodable mount request from %s",
|
|
numerichost);
|
|
svcerr_decode(transp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Get the real pathname and make sure it is a directory
|
|
* or a regular file if the -r option was specified
|
|
* and it exists.
|
|
*/
|
|
if (realpath(rpcpath, dirpath) == NULL ||
|
|
stat(dirpath, &stb) < 0 ||
|
|
(!S_ISDIR(stb.st_mode) &&
|
|
(dir_only || !S_ISREG(stb.st_mode))) ||
|
|
statfs(dirpath, &fsb) < 0) {
|
|
chdir("/"); /* Just in case realpath doesn't */
|
|
syslog(LOG_NOTICE,
|
|
"mount request from %s for non existent path %s",
|
|
numerichost, dirpath);
|
|
if (debug)
|
|
warnx("stat failed on %s", dirpath);
|
|
bad = ENOENT; /* We will send error reply later */
|
|
}
|
|
|
|
/* Check in the exports list */
|
|
sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
|
|
ep = ex_search(&fsb.f_fsid);
|
|
hostset = defset = 0;
|
|
if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
|
|
((dp = dirp_search(ep->ex_dirl, dirpath)) &&
|
|
chk_host(dp, saddr, &defset, &hostset)) ||
|
|
(defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
|
|
scan_tree(ep->ex_dirl, saddr) == 0))) {
|
|
if (bad) {
|
|
if (!svc_sendreply(transp, xdr_long,
|
|
(caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
}
|
|
if (hostset & DP_HOSTSET)
|
|
fhr.fhr_flag = hostset;
|
|
else
|
|
fhr.fhr_flag = defset;
|
|
fhr.fhr_vers = rqstp->rq_vers;
|
|
/* Get the file handle */
|
|
memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
|
|
if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
|
|
bad = errno;
|
|
syslog(LOG_ERR, "can't get fh for %s", dirpath);
|
|
if (!svc_sendreply(transp, xdr_long,
|
|
(caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
}
|
|
if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&fhr))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
add_mlist(host, dirpath);
|
|
else
|
|
add_mlist(numerichost, dirpath);
|
|
if (debug)
|
|
warnx("mount successful");
|
|
if (log)
|
|
syslog(LOG_NOTICE,
|
|
"mount request succeeded from %s for %s",
|
|
numerichost, dirpath);
|
|
} else {
|
|
bad = EACCES;
|
|
syslog(LOG_NOTICE,
|
|
"mount request denied from %s for %s",
|
|
numerichost, dirpath);
|
|
}
|
|
|
|
if (bad && !svc_sendreply(transp, xdr_long, (caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
case RPCMNT_DUMP:
|
|
if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
else if (log)
|
|
syslog(LOG_NOTICE,
|
|
"dump request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
case RPCMNT_UMOUNT:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"umount request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_getargs(transp, xdr_dir, rpcpath)) {
|
|
syslog(LOG_NOTICE, "undecodable umount request from %s",
|
|
numerichost);
|
|
svcerr_decode(transp);
|
|
return;
|
|
}
|
|
if (realpath(rpcpath, dirpath) == NULL) {
|
|
syslog(LOG_NOTICE, "umount request from %s "
|
|
"for non existent path %s",
|
|
numerichost, dirpath);
|
|
}
|
|
if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
del_mlist(host, dirpath);
|
|
del_mlist(numerichost, dirpath);
|
|
if (log)
|
|
syslog(LOG_NOTICE,
|
|
"umount request succeeded from %s for %s",
|
|
numerichost, dirpath);
|
|
return;
|
|
case RPCMNT_UMNTALL:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"umountall request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
del_mlist(host, NULL);
|
|
del_mlist(numerichost, NULL);
|
|
if (log)
|
|
syslog(LOG_NOTICE,
|
|
"umountall request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
case RPCMNT_EXPORT:
|
|
if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (log)
|
|
syslog(LOG_NOTICE,
|
|
"export request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
default:
|
|
svcerr_noproc(transp);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Xdr conversion for a dirpath string
|
|
*/
|
|
int
|
|
xdr_dir(xdrsp, dirp)
|
|
XDR *xdrsp;
|
|
char *dirp;
|
|
{
|
|
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
|
|
}
|
|
|
|
/*
|
|
* Xdr routine to generate file handle reply
|
|
*/
|
|
int
|
|
xdr_fhs(xdrsp, cp)
|
|
XDR *xdrsp;
|
|
caddr_t cp;
|
|
{
|
|
register struct fhreturn *fhrp = (struct fhreturn *)cp;
|
|
u_long ok = 0, len, auth;
|
|
|
|
if (!xdr_long(xdrsp, &ok))
|
|
return (0);
|
|
switch (fhrp->fhr_vers) {
|
|
case 1:
|
|
return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
|
|
case 3:
|
|
len = NFSX_V3FH;
|
|
if (!xdr_long(xdrsp, &len))
|
|
return (0);
|
|
if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
|
|
return (0);
|
|
if (fhrp->fhr_flag & DP_KERB)
|
|
auth = RPCAUTH_KERB4;
|
|
else
|
|
auth = RPCAUTH_UNIX;
|
|
len = 1;
|
|
if (!xdr_long(xdrsp, &len))
|
|
return (0);
|
|
return (xdr_long(xdrsp, &auth));
|
|
};
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
xdr_mlist(xdrsp, cp)
|
|
XDR *xdrsp;
|
|
caddr_t cp;
|
|
{
|
|
struct mountlist *mlp;
|
|
int true = 1;
|
|
int false = 0;
|
|
char *strp;
|
|
|
|
mlp = mlhead;
|
|
while (mlp) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (0);
|
|
strp = &mlp->ml_host[0];
|
|
if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
|
|
return (0);
|
|
strp = &mlp->ml_dirp[0];
|
|
if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
|
|
return (0);
|
|
mlp = mlp->ml_next;
|
|
}
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Xdr conversion for export list
|
|
*/
|
|
int
|
|
xdr_explist(xdrsp, cp)
|
|
XDR *xdrsp;
|
|
caddr_t cp;
|
|
{
|
|
struct exportlist *ep;
|
|
int false = 0;
|
|
int putdef;
|
|
sigset_t sighup_mask;
|
|
|
|
sigemptyset(&sighup_mask);
|
|
sigaddset(&sighup_mask, SIGHUP);
|
|
sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
|
|
ep = exphead;
|
|
while (ep) {
|
|
putdef = 0;
|
|
if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
|
|
goto errout;
|
|
if (ep->ex_defdir && putdef == 0 &&
|
|
put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL,
|
|
&putdef))
|
|
goto errout;
|
|
ep = ep->ex_next;
|
|
}
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (0);
|
|
return (1);
|
|
errout:
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called from xdr_explist() to traverse the tree and export the
|
|
* directory paths.
|
|
*/
|
|
int
|
|
put_exlist(dp, xdrsp, adp, putdefp)
|
|
struct dirlist *dp;
|
|
XDR *xdrsp;
|
|
struct dirlist *adp;
|
|
int *putdefp;
|
|
{
|
|
struct grouplist *grp;
|
|
struct hostlist *hp;
|
|
int true = 1;
|
|
int false = 0;
|
|
int gotalldir = 0;
|
|
char *strp;
|
|
|
|
if (dp) {
|
|
if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
|
|
return (1);
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = dp->dp_dirp;
|
|
if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
|
|
return (1);
|
|
if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
|
|
gotalldir = 1;
|
|
*putdefp = 1;
|
|
}
|
|
if ((dp->dp_flag & DP_DEFSET) == 0 &&
|
|
(gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
|
|
hp = dp->dp_hosts;
|
|
while (hp) {
|
|
grp = hp->ht_grp;
|
|
if (grp->gr_type == GT_HOST) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
|
|
if (!xdr_string(xdrsp, &strp,
|
|
RPCMNT_NAMELEN))
|
|
return (1);
|
|
} else if (grp->gr_type == GT_NET) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = grp->gr_ptr.gt_net.nt_name;
|
|
if (!xdr_string(xdrsp, &strp,
|
|
RPCMNT_NAMELEN))
|
|
return (1);
|
|
}
|
|
hp = hp->ht_next;
|
|
if (gotalldir && hp == (struct hostlist *)NULL) {
|
|
hp = adp->dp_hosts;
|
|
gotalldir = 0;
|
|
}
|
|
}
|
|
}
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (1);
|
|
if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
#define LINESIZ 10240
|
|
char line[LINESIZ];
|
|
FILE *exp_file;
|
|
|
|
/*
|
|
* Get the export list
|
|
*/
|
|
void
|
|
get_exportlist()
|
|
{
|
|
struct exportlist *ep, *ep2;
|
|
struct grouplist *grp, *tgrp;
|
|
struct exportlist **epp;
|
|
struct dirlist *dirhead;
|
|
struct statfs fsb, *fsp;
|
|
struct xucred anon;
|
|
char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
|
|
int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
|
|
|
|
dirp = NULL;
|
|
dirplen = 0;
|
|
|
|
/*
|
|
* First, get rid of the old list
|
|
*/
|
|
ep = exphead;
|
|
while (ep) {
|
|
ep2 = ep;
|
|
ep = ep->ex_next;
|
|
free_exp(ep2);
|
|
}
|
|
exphead = (struct exportlist *)NULL;
|
|
|
|
grp = grphead;
|
|
while (grp) {
|
|
tgrp = grp;
|
|
grp = grp->gr_next;
|
|
free_grp(tgrp);
|
|
}
|
|
grphead = (struct grouplist *)NULL;
|
|
|
|
/*
|
|
* And delete exports that are in the kernel for all local
|
|
* file systems.
|
|
* XXX: Should know how to handle all local exportable file systems
|
|
* instead of just "ufs".
|
|
*/
|
|
num = getmntinfo(&fsp, MNT_NOWAIT);
|
|
for (i = 0; i < num; i++) {
|
|
union {
|
|
struct ufs_args ua;
|
|
struct iso_args ia;
|
|
struct msdosfs_args da;
|
|
struct ntfs_args na;
|
|
} targs;
|
|
|
|
if (!strcmp(fsp->f_fstypename, "ufs") ||
|
|
!strcmp(fsp->f_fstypename, "msdosfs") ||
|
|
!strcmp(fsp->f_fstypename, "ntfs") ||
|
|
!strcmp(fsp->f_fstypename, "cd9660")) {
|
|
targs.ua.fspec = NULL;
|
|
targs.ua.export.ex_flags = MNT_DELEXPORT;
|
|
if (mount(fsp->f_fstypename, fsp->f_mntonname,
|
|
fsp->f_flags | MNT_UPDATE, (caddr_t)&targs) < 0 &&
|
|
errno != ENOENT)
|
|
syslog(LOG_ERR,
|
|
"can't delete exports for %s: %m",
|
|
fsp->f_mntonname);
|
|
}
|
|
fsp++;
|
|
}
|
|
|
|
/*
|
|
* Read in the exports file and build the list, calling
|
|
* mount() as we go along to push the export rules into the kernel.
|
|
*/
|
|
if ((exp_file = fopen(exname, "r")) == NULL) {
|
|
syslog(LOG_ERR, "can't open %s", exname);
|
|
exit(2);
|
|
}
|
|
dirhead = (struct dirlist *)NULL;
|
|
while (get_line()) {
|
|
if (debug)
|
|
warnx("got line %s", line);
|
|
cp = line;
|
|
nextfield(&cp, &endcp);
|
|
if (*cp == '#')
|
|
goto nextline;
|
|
|
|
/*
|
|
* Set defaults.
|
|
*/
|
|
has_host = FALSE;
|
|
anon = def_anon;
|
|
exflags = MNT_EXPORTED;
|
|
got_nondir = 0;
|
|
opt_flags = 0;
|
|
ep = (struct exportlist *)NULL;
|
|
|
|
/*
|
|
* Create new exports list entry
|
|
*/
|
|
len = endcp-cp;
|
|
tgrp = grp = get_grp();
|
|
while (len > 0) {
|
|
if (len > RPCMNT_NAMELEN) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
if (*cp == '-') {
|
|
if (ep == (struct exportlist *)NULL) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
if (debug)
|
|
warnx("doing opt %s", cp);
|
|
got_nondir = 1;
|
|
if (do_opt(&cp, &endcp, ep, grp, &has_host,
|
|
&exflags, &anon)) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
} else if (*cp == '/') {
|
|
savedc = *endcp;
|
|
*endcp = '\0';
|
|
if (check_dirpath(cp) &&
|
|
statfs(cp, &fsb) >= 0) {
|
|
if (got_nondir) {
|
|
syslog(LOG_ERR, "dirs must be first");
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
if (ep) {
|
|
if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
|
|
ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
} else {
|
|
/*
|
|
* See if this directory is already
|
|
* in the list.
|
|
*/
|
|
ep = ex_search(&fsb.f_fsid);
|
|
if (ep == (struct exportlist *)NULL) {
|
|
ep = get_exp();
|
|
ep->ex_fs = fsb.f_fsid;
|
|
ep->ex_fsdir = (char *)
|
|
malloc(strlen(fsb.f_mntonname) + 1);
|
|
if (ep->ex_fsdir)
|
|
strcpy(ep->ex_fsdir,
|
|
fsb.f_mntonname);
|
|
else
|
|
out_of_mem();
|
|
if (debug)
|
|
warnx("making new ep fs=0x%x,0x%x",
|
|
fsb.f_fsid.val[0],
|
|
fsb.f_fsid.val[1]);
|
|
} else if (debug)
|
|
warnx("found ep fs=0x%x,0x%x",
|
|
fsb.f_fsid.val[0],
|
|
fsb.f_fsid.val[1]);
|
|
}
|
|
|
|
/*
|
|
* Add dirpath to export mount point.
|
|
*/
|
|
dirp = add_expdir(&dirhead, cp, len);
|
|
dirplen = len;
|
|
} else {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
*endcp = savedc;
|
|
} else {
|
|
savedc = *endcp;
|
|
*endcp = '\0';
|
|
got_nondir = 1;
|
|
if (ep == (struct exportlist *)NULL) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
|
|
/*
|
|
* Get the host or netgroup.
|
|
*/
|
|
setnetgrent(cp);
|
|
netgrp = getnetgrent(&hst, &usr, &dom);
|
|
do {
|
|
if (has_host) {
|
|
grp->gr_next = get_grp();
|
|
grp = grp->gr_next;
|
|
}
|
|
if (netgrp) {
|
|
if (hst == 0) {
|
|
syslog(LOG_ERR,
|
|
"null hostname in netgroup %s, skipping", cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
} else if (get_host(hst, grp, tgrp)) {
|
|
syslog(LOG_ERR,
|
|
"bad host %s in netgroup %s, skipping", hst, cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
}
|
|
} else if (get_host(cp, grp, tgrp)) {
|
|
syslog(LOG_ERR, "bad host %s, skipping", cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
}
|
|
has_host = TRUE;
|
|
} while (netgrp && getnetgrent(&hst, &usr, &dom));
|
|
endnetgrent();
|
|
*endcp = savedc;
|
|
}
|
|
cp = endcp;
|
|
nextfield(&cp, &endcp);
|
|
len = endcp - cp;
|
|
}
|
|
if (check_options(dirhead)) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
if (!has_host) {
|
|
grp->gr_type = GT_DEFAULT;
|
|
if (debug)
|
|
warnx("adding a default entry");
|
|
|
|
/*
|
|
* Don't allow a network export coincide with a list of
|
|
* host(s) on the same line.
|
|
*/
|
|
} else if ((opt_flags & OP_NET) && tgrp->gr_next) {
|
|
syslog(LOG_ERR, "network/host conflict");
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
|
|
/*
|
|
* If an export list was specified on this line, make sure
|
|
* that we have at least one valid entry, otherwise skip it.
|
|
*/
|
|
} else {
|
|
grp = tgrp;
|
|
while (grp && grp->gr_type == GT_IGNORE)
|
|
grp = grp->gr_next;
|
|
if (! grp) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Loop through hosts, pushing the exports into the kernel.
|
|
* After loop, tgrp points to the start of the list and
|
|
* grp points to the last entry in the list.
|
|
*/
|
|
grp = tgrp;
|
|
do {
|
|
if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
|
|
&fsb)) {
|
|
getexp_err(ep, tgrp);
|
|
goto nextline;
|
|
}
|
|
} while (grp->gr_next && (grp = grp->gr_next));
|
|
|
|
/*
|
|
* Success. Update the data structures.
|
|
*/
|
|
if (has_host) {
|
|
hang_dirp(dirhead, tgrp, ep, opt_flags);
|
|
grp->gr_next = grphead;
|
|
grphead = tgrp;
|
|
} else {
|
|
hang_dirp(dirhead, (struct grouplist *)NULL, ep,
|
|
opt_flags);
|
|
free_grp(grp);
|
|
}
|
|
dirhead = (struct dirlist *)NULL;
|
|
if ((ep->ex_flag & EX_LINKED) == 0) {
|
|
ep2 = exphead;
|
|
epp = &exphead;
|
|
|
|
/*
|
|
* Insert in the list in alphabetical order.
|
|
*/
|
|
while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
|
|
epp = &ep2->ex_next;
|
|
ep2 = ep2->ex_next;
|
|
}
|
|
if (ep2)
|
|
ep->ex_next = ep2;
|
|
*epp = ep;
|
|
ep->ex_flag |= EX_LINKED;
|
|
}
|
|
nextline:
|
|
if (dirhead) {
|
|
free_dir(dirhead);
|
|
dirhead = (struct dirlist *)NULL;
|
|
}
|
|
}
|
|
fclose(exp_file);
|
|
}
|
|
|
|
/*
|
|
* Allocate an export list element
|
|
*/
|
|
struct exportlist *
|
|
get_exp()
|
|
{
|
|
struct exportlist *ep;
|
|
|
|
ep = (struct exportlist *)malloc(sizeof (struct exportlist));
|
|
if (ep == (struct exportlist *)NULL)
|
|
out_of_mem();
|
|
memset(ep, 0, sizeof(struct exportlist));
|
|
return (ep);
|
|
}
|
|
|
|
/*
|
|
* Allocate a group list element
|
|
*/
|
|
struct grouplist *
|
|
get_grp()
|
|
{
|
|
struct grouplist *gp;
|
|
|
|
gp = (struct grouplist *)malloc(sizeof (struct grouplist));
|
|
if (gp == (struct grouplist *)NULL)
|
|
out_of_mem();
|
|
memset(gp, 0, sizeof(struct grouplist));
|
|
return (gp);
|
|
}
|
|
|
|
/*
|
|
* Clean up upon an error in get_exportlist().
|
|
*/
|
|
void
|
|
getexp_err(ep, grp)
|
|
struct exportlist *ep;
|
|
struct grouplist *grp;
|
|
{
|
|
struct grouplist *tgrp;
|
|
|
|
syslog(LOG_ERR, "bad exports list line %s", line);
|
|
if (ep && (ep->ex_flag & EX_LINKED) == 0)
|
|
free_exp(ep);
|
|
while (grp) {
|
|
tgrp = grp;
|
|
grp = grp->gr_next;
|
|
free_grp(tgrp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Search the export list for a matching fs.
|
|
*/
|
|
struct exportlist *
|
|
ex_search(fsid)
|
|
fsid_t *fsid;
|
|
{
|
|
struct exportlist *ep;
|
|
|
|
ep = exphead;
|
|
while (ep) {
|
|
if (ep->ex_fs.val[0] == fsid->val[0] &&
|
|
ep->ex_fs.val[1] == fsid->val[1])
|
|
return (ep);
|
|
ep = ep->ex_next;
|
|
}
|
|
return (ep);
|
|
}
|
|
|
|
/*
|
|
* Add a directory path to the list.
|
|
*/
|
|
char *
|
|
add_expdir(dpp, cp, len)
|
|
struct dirlist **dpp;
|
|
char *cp;
|
|
int len;
|
|
{
|
|
struct dirlist *dp;
|
|
|
|
dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
|
|
if (dp == (struct dirlist *)NULL)
|
|
out_of_mem();
|
|
dp->dp_left = *dpp;
|
|
dp->dp_right = (struct dirlist *)NULL;
|
|
dp->dp_flag = 0;
|
|
dp->dp_hosts = (struct hostlist *)NULL;
|
|
strcpy(dp->dp_dirp, cp);
|
|
*dpp = dp;
|
|
return (dp->dp_dirp);
|
|
}
|
|
|
|
/*
|
|
* Hang the dir list element off the dirpath binary tree as required
|
|
* and update the entry for host.
|
|
*/
|
|
void
|
|
hang_dirp(dp, grp, ep, flags)
|
|
struct dirlist *dp;
|
|
struct grouplist *grp;
|
|
struct exportlist *ep;
|
|
int flags;
|
|
{
|
|
struct hostlist *hp;
|
|
struct dirlist *dp2;
|
|
|
|
if (flags & OP_ALLDIRS) {
|
|
if (ep->ex_defdir)
|
|
free((caddr_t)dp);
|
|
else
|
|
ep->ex_defdir = dp;
|
|
if (grp == (struct grouplist *)NULL) {
|
|
ep->ex_defdir->dp_flag |= DP_DEFSET;
|
|
if (flags & OP_KERB)
|
|
ep->ex_defdir->dp_flag |= DP_KERB;
|
|
} else while (grp) {
|
|
hp = get_ht();
|
|
if (flags & OP_KERB)
|
|
hp->ht_flag |= DP_KERB;
|
|
hp->ht_grp = grp;
|
|
hp->ht_next = ep->ex_defdir->dp_hosts;
|
|
ep->ex_defdir->dp_hosts = hp;
|
|
grp = grp->gr_next;
|
|
}
|
|
} else {
|
|
|
|
/*
|
|
* Loop through the directories adding them to the tree.
|
|
*/
|
|
while (dp) {
|
|
dp2 = dp->dp_left;
|
|
add_dlist(&ep->ex_dirl, dp, grp, flags);
|
|
dp = dp2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the binary tree either updating a node that is already there
|
|
* for the new directory or adding the new node.
|
|
*/
|
|
void
|
|
add_dlist(dpp, newdp, grp, flags)
|
|
struct dirlist **dpp;
|
|
struct dirlist *newdp;
|
|
struct grouplist *grp;
|
|
int flags;
|
|
{
|
|
struct dirlist *dp;
|
|
struct hostlist *hp;
|
|
int cmp;
|
|
|
|
dp = *dpp;
|
|
if (dp) {
|
|
cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
|
|
if (cmp > 0) {
|
|
add_dlist(&dp->dp_left, newdp, grp, flags);
|
|
return;
|
|
} else if (cmp < 0) {
|
|
add_dlist(&dp->dp_right, newdp, grp, flags);
|
|
return;
|
|
} else
|
|
free((caddr_t)newdp);
|
|
} else {
|
|
dp = newdp;
|
|
dp->dp_left = (struct dirlist *)NULL;
|
|
*dpp = dp;
|
|
}
|
|
if (grp) {
|
|
|
|
/*
|
|
* Hang all of the host(s) off of the directory point.
|
|
*/
|
|
do {
|
|
hp = get_ht();
|
|
if (flags & OP_KERB)
|
|
hp->ht_flag |= DP_KERB;
|
|
hp->ht_grp = grp;
|
|
hp->ht_next = dp->dp_hosts;
|
|
dp->dp_hosts = hp;
|
|
grp = grp->gr_next;
|
|
} while (grp);
|
|
} else {
|
|
dp->dp_flag |= DP_DEFSET;
|
|
if (flags & OP_KERB)
|
|
dp->dp_flag |= DP_KERB;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Search for a dirpath on the export point.
|
|
*/
|
|
struct dirlist *
|
|
dirp_search(dp, dirp)
|
|
struct dirlist *dp;
|
|
char *dirp;
|
|
{
|
|
int cmp;
|
|
|
|
if (dp) {
|
|
cmp = strcmp(dp->dp_dirp, dirp);
|
|
if (cmp > 0)
|
|
return (dirp_search(dp->dp_left, dirp));
|
|
else if (cmp < 0)
|
|
return (dirp_search(dp->dp_right, dirp));
|
|
else
|
|
return (dp);
|
|
}
|
|
return (dp);
|
|
}
|
|
|
|
/*
|
|
* Scan for a host match in a directory tree.
|
|
*/
|
|
int
|
|
chk_host(dp, saddr, defsetp, hostsetp)
|
|
struct dirlist *dp;
|
|
struct sockaddr *saddr;
|
|
int *defsetp;
|
|
int *hostsetp;
|
|
{
|
|
struct hostlist *hp;
|
|
struct grouplist *grp;
|
|
struct addrinfo *ai;
|
|
|
|
if (dp) {
|
|
if (dp->dp_flag & DP_DEFSET)
|
|
*defsetp = dp->dp_flag;
|
|
hp = dp->dp_hosts;
|
|
while (hp) {
|
|
grp = hp->ht_grp;
|
|
switch (grp->gr_type) {
|
|
case GT_HOST:
|
|
ai = grp->gr_ptr.gt_addrinfo;
|
|
for (; ai; ai = ai->ai_next) {
|
|
if (!sacmp(ai->ai_addr, saddr, NULL)) {
|
|
*hostsetp =
|
|
(hp->ht_flag | DP_HOSTSET);
|
|
return (1);
|
|
}
|
|
}
|
|
break;
|
|
case GT_NET:
|
|
if (!sacmp(saddr, (struct sockaddr *)
|
|
&grp->gr_ptr.gt_net.nt_net,
|
|
(struct sockaddr *)
|
|
&grp->gr_ptr.gt_net.nt_mask)) {
|
|
*hostsetp = (hp->ht_flag | DP_HOSTSET);
|
|
return (1);
|
|
}
|
|
break;
|
|
}
|
|
hp = hp->ht_next;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Scan tree for a host that matches the address.
|
|
*/
|
|
int
|
|
scan_tree(dp, saddr)
|
|
struct dirlist *dp;
|
|
struct sockaddr *saddr;
|
|
{
|
|
int defset, hostset;
|
|
|
|
if (dp) {
|
|
if (scan_tree(dp->dp_left, saddr))
|
|
return (1);
|
|
if (chk_host(dp, saddr, &defset, &hostset))
|
|
return (1);
|
|
if (scan_tree(dp->dp_right, saddr))
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Traverse the dirlist tree and free it up.
|
|
*/
|
|
void
|
|
free_dir(dp)
|
|
struct dirlist *dp;
|
|
{
|
|
|
|
if (dp) {
|
|
free_dir(dp->dp_left);
|
|
free_dir(dp->dp_right);
|
|
free_host(dp->dp_hosts);
|
|
free((caddr_t)dp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parse the option string and update fields.
|
|
* Option arguments may either be -<option>=<value> or
|
|
* -<option> <value>
|
|
*/
|
|
int
|
|
do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr)
|
|
char **cpp, **endcpp;
|
|
struct exportlist *ep;
|
|
struct grouplist *grp;
|
|
int *has_hostp;
|
|
int *exflagsp;
|
|
struct xucred *cr;
|
|
{
|
|
char *cpoptarg, *cpoptend;
|
|
char *cp, *endcp, *cpopt, savedc, savedc2;
|
|
int allflag, usedarg;
|
|
|
|
savedc2 = '\0';
|
|
cpopt = *cpp;
|
|
cpopt++;
|
|
cp = *endcpp;
|
|
savedc = *cp;
|
|
*cp = '\0';
|
|
while (cpopt && *cpopt) {
|
|
allflag = 1;
|
|
usedarg = -2;
|
|
if ((cpoptend = strchr(cpopt, ','))) {
|
|
*cpoptend++ = '\0';
|
|
if ((cpoptarg = strchr(cpopt, '=')))
|
|
*cpoptarg++ = '\0';
|
|
} else {
|
|
if ((cpoptarg = strchr(cpopt, '=')))
|
|
*cpoptarg++ = '\0';
|
|
else {
|
|
*cp = savedc;
|
|
nextfield(&cp, &endcp);
|
|
**endcpp = '\0';
|
|
if (endcp > cp && *cp != '-') {
|
|
cpoptarg = cp;
|
|
savedc2 = *endcp;
|
|
*endcp = '\0';
|
|
usedarg = 0;
|
|
}
|
|
}
|
|
}
|
|
if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
|
|
*exflagsp |= MNT_EXRDONLY;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
|
|
!(allflag = strcmp(cpopt, "mapall")) ||
|
|
!strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
|
|
usedarg++;
|
|
parsecred(cpoptarg, cr);
|
|
if (allflag == 0) {
|
|
*exflagsp |= MNT_EXPORTANON;
|
|
opt_flags |= OP_MAPALL;
|
|
} else
|
|
opt_flags |= OP_MAPROOT;
|
|
} else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
|
|
*exflagsp |= MNT_EXKERB;
|
|
opt_flags |= OP_KERB;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "mask") ||
|
|
!strcmp(cpopt, "m"))) {
|
|
if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
|
|
syslog(LOG_ERR, "bad mask: %s", cpoptarg);
|
|
return (1);
|
|
}
|
|
usedarg++;
|
|
opt_flags |= OP_MASK;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "network") ||
|
|
!strcmp(cpopt, "n"))) {
|
|
if (strchr(cpoptarg, '/') != NULL) {
|
|
if (debug)
|
|
fprintf(stderr, "setting OP_MASKLEN\n");
|
|
opt_flags |= OP_MASKLEN;
|
|
}
|
|
if (grp->gr_type != GT_NULL) {
|
|
syslog(LOG_ERR, "network/host conflict");
|
|
return (1);
|
|
} else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
|
|
syslog(LOG_ERR, "bad net: %s", cpoptarg);
|
|
return (1);
|
|
}
|
|
grp->gr_type = GT_NET;
|
|
*has_hostp = 1;
|
|
usedarg++;
|
|
opt_flags |= OP_NET;
|
|
} else if (!strcmp(cpopt, "alldirs")) {
|
|
opt_flags |= OP_ALLDIRS;
|
|
} else if (!strcmp(cpopt, "public")) {
|
|
*exflagsp |= MNT_EXPUBLIC;
|
|
} else if (!strcmp(cpopt, "webnfs")) {
|
|
*exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
|
|
opt_flags |= OP_MAPALL;
|
|
} else if (cpoptarg && !strcmp(cpopt, "index")) {
|
|
ep->ex_indexfile = strdup(cpoptarg);
|
|
} else {
|
|
syslog(LOG_ERR, "bad opt %s", cpopt);
|
|
return (1);
|
|
}
|
|
if (usedarg >= 0) {
|
|
*endcp = savedc2;
|
|
**endcpp = savedc;
|
|
if (usedarg > 0) {
|
|
*cpp = cp;
|
|
*endcpp = endcp;
|
|
}
|
|
return (0);
|
|
}
|
|
cpopt = cpoptend;
|
|
}
|
|
**endcpp = savedc;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Translate a character string to the corresponding list of network
|
|
* addresses for a hostname.
|
|
*/
|
|
int
|
|
get_host(cp, grp, tgrp)
|
|
char *cp;
|
|
struct grouplist *grp;
|
|
struct grouplist *tgrp;
|
|
{
|
|
struct grouplist *checkgrp;
|
|
struct addrinfo *ai, *tai, hints;
|
|
int ecode;
|
|
char host[NI_MAXHOST];
|
|
|
|
if (grp->gr_type != GT_NULL) {
|
|
syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
|
|
return (1);
|
|
}
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_CANONNAME;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
ecode = getaddrinfo(cp, NULL, &hints, &ai);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR,"can't get address info for host %s", cp);
|
|
return 1;
|
|
}
|
|
grp->gr_ptr.gt_addrinfo = ai;
|
|
while (ai != NULL) {
|
|
if (ai->ai_canonname == NULL) {
|
|
if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
|
|
sizeof host, NULL, 0, ninumeric) != 0)
|
|
strlcpy(host, "?", sizeof(host));
|
|
ai->ai_canonname = strdup(host);
|
|
ai->ai_flags |= AI_CANONNAME;
|
|
}
|
|
if (debug)
|
|
fprintf(stderr, "got host %s\n", ai->ai_canonname);
|
|
/*
|
|
* Sanity check: make sure we don't already have an entry
|
|
* for this host in the grouplist.
|
|
*/
|
|
for (checkgrp = tgrp; checkgrp != NULL;
|
|
checkgrp = checkgrp->gr_next) {
|
|
if (checkgrp->gr_type != GT_HOST)
|
|
continue;
|
|
for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
|
|
tai = tai->ai_next) {
|
|
if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
|
|
continue;
|
|
if (debug)
|
|
fprintf(stderr,
|
|
"ignoring duplicate host %s\n",
|
|
ai->ai_canonname);
|
|
grp->gr_type = GT_IGNORE;
|
|
return (0);
|
|
}
|
|
}
|
|
ai = ai->ai_next;
|
|
}
|
|
grp->gr_type = GT_HOST;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free up an exports list component
|
|
*/
|
|
void
|
|
free_exp(ep)
|
|
struct exportlist *ep;
|
|
{
|
|
|
|
if (ep->ex_defdir) {
|
|
free_host(ep->ex_defdir->dp_hosts);
|
|
free((caddr_t)ep->ex_defdir);
|
|
}
|
|
if (ep->ex_fsdir)
|
|
free(ep->ex_fsdir);
|
|
if (ep->ex_indexfile)
|
|
free(ep->ex_indexfile);
|
|
free_dir(ep->ex_dirl);
|
|
free((caddr_t)ep);
|
|
}
|
|
|
|
/*
|
|
* Free hosts.
|
|
*/
|
|
void
|
|
free_host(hp)
|
|
struct hostlist *hp;
|
|
{
|
|
struct hostlist *hp2;
|
|
|
|
while (hp) {
|
|
hp2 = hp;
|
|
hp = hp->ht_next;
|
|
free((caddr_t)hp2);
|
|
}
|
|
}
|
|
|
|
struct hostlist *
|
|
get_ht()
|
|
{
|
|
struct hostlist *hp;
|
|
|
|
hp = (struct hostlist *)malloc(sizeof (struct hostlist));
|
|
if (hp == (struct hostlist *)NULL)
|
|
out_of_mem();
|
|
hp->ht_next = (struct hostlist *)NULL;
|
|
hp->ht_flag = 0;
|
|
return (hp);
|
|
}
|
|
|
|
/*
|
|
* Out of memory, fatal
|
|
*/
|
|
void
|
|
out_of_mem()
|
|
{
|
|
|
|
syslog(LOG_ERR, "out of memory");
|
|
exit(2);
|
|
}
|
|
|
|
/*
|
|
* Do the mount syscall with the update flag to push the export info into
|
|
* the kernel.
|
|
*/
|
|
int
|
|
do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb)
|
|
struct exportlist *ep;
|
|
struct grouplist *grp;
|
|
int exflags;
|
|
struct xucred *anoncrp;
|
|
char *dirp;
|
|
int dirplen;
|
|
struct statfs *fsb;
|
|
{
|
|
struct statfs fsb1;
|
|
struct addrinfo *ai;
|
|
struct export_args *eap;
|
|
char *cp = NULL;
|
|
int done;
|
|
char savedc = '\0';
|
|
union {
|
|
struct ufs_args ua;
|
|
struct iso_args ia;
|
|
struct msdosfs_args da;
|
|
struct ntfs_args na;
|
|
} args;
|
|
|
|
bzero(&args, sizeof args);
|
|
/* XXX, we assume that all xx_args look like ufs_args. */
|
|
args.ua.fspec = 0;
|
|
eap = &args.ua.export;
|
|
|
|
eap->ex_flags = exflags;
|
|
eap->ex_anon = *anoncrp;
|
|
eap->ex_indexfile = ep->ex_indexfile;
|
|
if (grp->gr_type == GT_HOST)
|
|
ai = grp->gr_ptr.gt_addrinfo;
|
|
else
|
|
ai = NULL;
|
|
done = FALSE;
|
|
while (!done) {
|
|
switch (grp->gr_type) {
|
|
case GT_HOST:
|
|
if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
|
|
goto skip;
|
|
eap->ex_addr = ai->ai_addr;
|
|
eap->ex_addrlen = ai->ai_addrlen;
|
|
eap->ex_masklen = 0;
|
|
break;
|
|
case GT_NET:
|
|
if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
|
|
have_v6 == 0)
|
|
goto skip;
|
|
eap->ex_addr =
|
|
(struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
|
|
eap->ex_addrlen = args.ua.export.ex_addr->sa_len;
|
|
eap->ex_mask =
|
|
(struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
|
|
eap->ex_masklen = args.ua.export.ex_mask->sa_len;
|
|
break;
|
|
case GT_DEFAULT:
|
|
eap->ex_addr = NULL;
|
|
eap->ex_addrlen = 0;
|
|
eap->ex_mask = NULL;
|
|
eap->ex_masklen = 0;
|
|
break;
|
|
case GT_IGNORE:
|
|
return(0);
|
|
break;
|
|
default:
|
|
syslog(LOG_ERR, "bad grouptype");
|
|
if (cp)
|
|
*cp = savedc;
|
|
return (1);
|
|
};
|
|
|
|
/*
|
|
* XXX:
|
|
* Maybe I should just use the fsb->f_mntonname path instead
|
|
* of looping back up the dirp to the mount point??
|
|
* Also, needs to know how to export all types of local
|
|
* exportable file systems and not just "ufs".
|
|
*/
|
|
while (mount(fsb->f_fstypename, dirp,
|
|
fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) {
|
|
if (cp)
|
|
*cp-- = savedc;
|
|
else
|
|
cp = dirp + dirplen - 1;
|
|
if (errno == EPERM) {
|
|
if (debug)
|
|
warnx("can't change attributes for %s",
|
|
dirp);
|
|
syslog(LOG_ERR,
|
|
"can't change attributes for %s", dirp);
|
|
return (1);
|
|
}
|
|
if (opt_flags & OP_ALLDIRS) {
|
|
syslog(LOG_ERR, "could not remount %s: %m",
|
|
dirp);
|
|
return (1);
|
|
}
|
|
/* back up over the last component */
|
|
while (*cp == '/' && cp > dirp)
|
|
cp--;
|
|
while (*(cp - 1) != '/' && cp > dirp)
|
|
cp--;
|
|
if (cp == dirp) {
|
|
if (debug)
|
|
warnx("mnt unsucc");
|
|
syslog(LOG_ERR, "can't export %s", dirp);
|
|
return (1);
|
|
}
|
|
savedc = *cp;
|
|
*cp = '\0';
|
|
/* Check that we're still on the same filesystem. */
|
|
if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
|
|
&fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
|
|
*cp = savedc;
|
|
syslog(LOG_ERR, "can't export %s", dirp);
|
|
return (1);
|
|
}
|
|
}
|
|
skip:
|
|
if (ai != NULL)
|
|
ai = ai->ai_next;
|
|
if (ai == NULL)
|
|
done = TRUE;
|
|
}
|
|
if (cp)
|
|
*cp = savedc;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Translate a net address.
|
|
*
|
|
* If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
|
|
*/
|
|
int
|
|
get_net(cp, net, maskflg)
|
|
char *cp;
|
|
struct netmsk *net;
|
|
int maskflg;
|
|
{
|
|
struct netent *np = NULL;
|
|
char *name, *p, *prefp;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr *sa = NULL;
|
|
struct addrinfo hints, *ai = NULL;
|
|
char netname[NI_MAXHOST];
|
|
long preflen;
|
|
|
|
p = prefp = NULL;
|
|
if ((opt_flags & OP_MASKLEN) && !maskflg) {
|
|
p = strchr(cp, '/');
|
|
*p = '\0';
|
|
prefp = p + 1;
|
|
}
|
|
|
|
/*
|
|
* Check for a numeric address first. We wish to avoid
|
|
* possible DNS lookups in getnetbyname().
|
|
*/
|
|
if (isxdigit(*cp) || *cp == ':') {
|
|
memset(&hints, 0, sizeof hints);
|
|
/* Ensure the mask and the network have the same family. */
|
|
if (maskflg && (opt_flags & OP_NET))
|
|
hints.ai_family = net->nt_net.ss_family;
|
|
else if (!maskflg && (opt_flags & OP_HAVEMASK))
|
|
hints.ai_family = net->nt_mask.ss_family;
|
|
else
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
|
|
sa = ai->ai_addr;
|
|
if (sa != NULL && ai->ai_family == AF_INET) {
|
|
/*
|
|
* The address in `cp' is really a network address, so
|
|
* use inet_network() to re-interpret this correctly.
|
|
* e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
|
|
*/
|
|
bzero(&sin, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof sin;
|
|
sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
|
|
if (debug)
|
|
fprintf(stderr, "get_net: v4 addr %s\n",
|
|
inet_ntoa(sin.sin_addr));
|
|
sa = (struct sockaddr *)&sin;
|
|
}
|
|
}
|
|
if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
|
|
bzero(&sin, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof sin;
|
|
sin.sin_addr = inet_makeaddr(np->n_net, 0);
|
|
sa = (struct sockaddr *)&sin;
|
|
}
|
|
if (sa == NULL)
|
|
goto fail;
|
|
|
|
if (maskflg) {
|
|
/* The specified sockaddr is a mask. */
|
|
if (checkmask(sa) != 0)
|
|
goto fail;
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
opt_flags |= OP_HAVEMASK;
|
|
} else {
|
|
/* The specified sockaddr is a network address. */
|
|
bcopy(sa, &net->nt_net, sa->sa_len);
|
|
|
|
/* Get a network name for the export list. */
|
|
if (np) {
|
|
name = np->n_name;
|
|
} else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
|
|
NULL, 0, ninumeric) == 0) {
|
|
name = netname;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
if ((net->nt_name = strdup(name)) == NULL)
|
|
out_of_mem();
|
|
|
|
/*
|
|
* Extract a mask from either a "/<masklen>" suffix, or
|
|
* from the class of an IPv4 address.
|
|
*/
|
|
if (opt_flags & OP_MASKLEN) {
|
|
preflen = strtol(prefp, NULL, 10);
|
|
if (preflen < 0L || preflen == LONG_MAX)
|
|
goto fail;
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
if (makemask(&net->nt_mask, (int)preflen) != 0)
|
|
goto fail;
|
|
opt_flags |= OP_HAVEMASK;
|
|
*p = '/';
|
|
} else if (sa->sa_family == AF_INET &&
|
|
(opt_flags & OP_MASK) == 0) {
|
|
in_addr_t addr;
|
|
|
|
addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
|
|
if (IN_CLASSA(addr))
|
|
preflen = 8;
|
|
else if (IN_CLASSB(addr))
|
|
preflen = 16;
|
|
else if (IN_CLASSC(addr))
|
|
preflen = 24;
|
|
else if (IN_CLASSD(addr))
|
|
preflen = 28;
|
|
else
|
|
preflen = 32; /* XXX */
|
|
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
makemask(&net->nt_mask, (int)preflen);
|
|
opt_flags |= OP_HAVEMASK;
|
|
}
|
|
}
|
|
|
|
if (ai)
|
|
freeaddrinfo(ai);
|
|
return 0;
|
|
|
|
fail:
|
|
if (ai)
|
|
freeaddrinfo(ai);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Parse out the next white space separated field
|
|
*/
|
|
void
|
|
nextfield(cp, endcp)
|
|
char **cp;
|
|
char **endcp;
|
|
{
|
|
char *p;
|
|
|
|
p = *cp;
|
|
while (*p == ' ' || *p == '\t')
|
|
p++;
|
|
if (*p == '\n' || *p == '\0')
|
|
*cp = *endcp = p;
|
|
else {
|
|
*cp = p++;
|
|
while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
|
|
p++;
|
|
*endcp = p;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get an exports file line. Skip over blank lines and handle line
|
|
* continuations.
|
|
*/
|
|
int
|
|
get_line()
|
|
{
|
|
char *p, *cp;
|
|
int len;
|
|
int totlen, cont_line;
|
|
|
|
/*
|
|
* Loop around ignoring blank lines and getting all continuation lines.
|
|
*/
|
|
p = line;
|
|
totlen = 0;
|
|
do {
|
|
if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
|
|
return (0);
|
|
len = strlen(p);
|
|
cp = p + len - 1;
|
|
cont_line = 0;
|
|
while (cp >= p &&
|
|
(*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
|
|
if (*cp == '\\')
|
|
cont_line = 1;
|
|
cp--;
|
|
len--;
|
|
}
|
|
if (cont_line) {
|
|
*++cp = ' ';
|
|
len++;
|
|
}
|
|
*++cp = '\0';
|
|
if (len > 0) {
|
|
totlen += len;
|
|
if (totlen >= LINESIZ) {
|
|
syslog(LOG_ERR, "exports line too long");
|
|
exit(2);
|
|
}
|
|
p = cp;
|
|
}
|
|
} while (totlen == 0 || cont_line);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Parse a description of a credential.
|
|
*/
|
|
void
|
|
parsecred(namelist, cr)
|
|
char *namelist;
|
|
struct xucred *cr;
|
|
{
|
|
char *name;
|
|
int cnt;
|
|
char *names;
|
|
struct passwd *pw;
|
|
struct group *gr;
|
|
int ngroups, groups[NGROUPS + 1];
|
|
|
|
/*
|
|
* Set up the unprivileged user.
|
|
*/
|
|
cr->cr_uid = -2;
|
|
cr->cr_groups[0] = -2;
|
|
cr->cr_ngroups = 1;
|
|
/*
|
|
* Get the user's password table entry.
|
|
*/
|
|
names = strsep(&namelist, " \t\n");
|
|
name = strsep(&names, ":");
|
|
if (isdigit(*name) || *name == '-')
|
|
pw = getpwuid(atoi(name));
|
|
else
|
|
pw = getpwnam(name);
|
|
/*
|
|
* Credentials specified as those of a user.
|
|
*/
|
|
if (names == NULL) {
|
|
if (pw == NULL) {
|
|
syslog(LOG_ERR, "unknown user: %s", name);
|
|
return;
|
|
}
|
|
cr->cr_uid = pw->pw_uid;
|
|
ngroups = NGROUPS + 1;
|
|
if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
|
|
syslog(LOG_ERR, "too many groups");
|
|
/*
|
|
* Convert from int's to gid_t's and compress out duplicate
|
|
*/
|
|
cr->cr_ngroups = ngroups - 1;
|
|
cr->cr_groups[0] = groups[0];
|
|
for (cnt = 2; cnt < ngroups; cnt++)
|
|
cr->cr_groups[cnt - 1] = groups[cnt];
|
|
return;
|
|
}
|
|
/*
|
|
* Explicit credential specified as a colon separated list:
|
|
* uid:gid:gid:...
|
|
*/
|
|
if (pw != NULL)
|
|
cr->cr_uid = pw->pw_uid;
|
|
else if (isdigit(*name) || *name == '-')
|
|
cr->cr_uid = atoi(name);
|
|
else {
|
|
syslog(LOG_ERR, "unknown user: %s", name);
|
|
return;
|
|
}
|
|
cr->cr_ngroups = 0;
|
|
while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
|
|
name = strsep(&names, ":");
|
|
if (isdigit(*name) || *name == '-') {
|
|
cr->cr_groups[cr->cr_ngroups++] = atoi(name);
|
|
} else {
|
|
if ((gr = getgrnam(name)) == NULL) {
|
|
syslog(LOG_ERR, "unknown group: %s", name);
|
|
continue;
|
|
}
|
|
cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
|
|
}
|
|
}
|
|
if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
|
|
syslog(LOG_ERR, "too many groups");
|
|
}
|
|
|
|
#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
|
|
/*
|
|
* Routines that maintain the remote mounttab
|
|
*/
|
|
void
|
|
get_mountlist()
|
|
{
|
|
struct mountlist *mlp, **mlpp;
|
|
char *host, *dirp, *cp;
|
|
char str[STRSIZ];
|
|
FILE *mlfile;
|
|
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
|
|
if (errno == ENOENT)
|
|
return;
|
|
else {
|
|
syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
}
|
|
mlpp = &mlhead;
|
|
while (fgets(str, STRSIZ, mlfile) != NULL) {
|
|
cp = str;
|
|
host = strsep(&cp, " \t\n");
|
|
dirp = strsep(&cp, " \t\n");
|
|
if (host == NULL || dirp == NULL)
|
|
continue;
|
|
mlp = (struct mountlist *)malloc(sizeof (*mlp));
|
|
if (mlp == (struct mountlist *)NULL)
|
|
out_of_mem();
|
|
strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
|
|
mlp->ml_host[RPCMNT_NAMELEN] = '\0';
|
|
strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
|
|
mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
|
|
mlp->ml_next = (struct mountlist *)NULL;
|
|
*mlpp = mlp;
|
|
mlpp = &mlp->ml_next;
|
|
}
|
|
fclose(mlfile);
|
|
}
|
|
|
|
void
|
|
del_mlist(char *hostp, char *dirp)
|
|
{
|
|
struct mountlist *mlp, **mlpp;
|
|
struct mountlist *mlp2;
|
|
FILE *mlfile;
|
|
int fnd = 0;
|
|
|
|
mlpp = &mlhead;
|
|
mlp = mlhead;
|
|
while (mlp) {
|
|
if (!strcmp(mlp->ml_host, hostp) &&
|
|
(!dirp || !strcmp(mlp->ml_dirp, dirp))) {
|
|
fnd = 1;
|
|
mlp2 = mlp;
|
|
*mlpp = mlp = mlp->ml_next;
|
|
free((caddr_t)mlp2);
|
|
} else {
|
|
mlpp = &mlp->ml_next;
|
|
mlp = mlp->ml_next;
|
|
}
|
|
}
|
|
if (fnd) {
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
|
|
syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
mlp = mlhead;
|
|
while (mlp) {
|
|
fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
|
|
mlp = mlp->ml_next;
|
|
}
|
|
fclose(mlfile);
|
|
}
|
|
}
|
|
|
|
void
|
|
add_mlist(hostp, dirp)
|
|
char *hostp, *dirp;
|
|
{
|
|
struct mountlist *mlp, **mlpp;
|
|
FILE *mlfile;
|
|
|
|
mlpp = &mlhead;
|
|
mlp = mlhead;
|
|
while (mlp) {
|
|
if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
|
|
return;
|
|
mlpp = &mlp->ml_next;
|
|
mlp = mlp->ml_next;
|
|
}
|
|
mlp = (struct mountlist *)malloc(sizeof (*mlp));
|
|
if (mlp == (struct mountlist *)NULL)
|
|
out_of_mem();
|
|
strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
|
|
mlp->ml_host[RPCMNT_NAMELEN] = '\0';
|
|
strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
|
|
mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
|
|
mlp->ml_next = (struct mountlist *)NULL;
|
|
*mlpp = mlp;
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
|
|
syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
|
|
fclose(mlfile);
|
|
}
|
|
|
|
/*
|
|
* Free up a group list.
|
|
*/
|
|
void
|
|
free_grp(grp)
|
|
struct grouplist *grp;
|
|
{
|
|
if (grp->gr_type == GT_HOST) {
|
|
if (grp->gr_ptr.gt_addrinfo != NULL)
|
|
freeaddrinfo(grp->gr_ptr.gt_addrinfo);
|
|
} else if (grp->gr_type == GT_NET) {
|
|
if (grp->gr_ptr.gt_net.nt_name)
|
|
free(grp->gr_ptr.gt_net.nt_name);
|
|
}
|
|
free((caddr_t)grp);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
SYSLOG(int pri, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
/*
|
|
* Check options for consistency.
|
|
*/
|
|
int
|
|
check_options(dp)
|
|
struct dirlist *dp;
|
|
{
|
|
|
|
if (dp == (struct dirlist *)NULL)
|
|
return (1);
|
|
if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
|
|
(opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
|
|
(opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
|
|
syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
|
|
syslog(LOG_ERR, "-mask requires -network");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
|
|
syslog(LOG_ERR, "-network requires mask specification");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
|
|
syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
|
|
syslog(LOG_ERR, "-alldirs has multiple directories");
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check an absolute directory path for any symbolic links. Return true
|
|
*/
|
|
int
|
|
check_dirpath(dirp)
|
|
char *dirp;
|
|
{
|
|
char *cp;
|
|
int ret = 1;
|
|
struct stat sb;
|
|
|
|
cp = dirp + 1;
|
|
while (*cp && ret) {
|
|
if (*cp == '/') {
|
|
*cp = '\0';
|
|
if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
|
|
ret = 0;
|
|
*cp = '/';
|
|
}
|
|
cp++;
|
|
}
|
|
if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
|
|
ret = 0;
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Make a netmask according to the specified prefix length. The ss_family
|
|
* and other non-address fields must be initialised before calling this.
|
|
*/
|
|
int
|
|
makemask(struct sockaddr_storage *ssp, int bitlen)
|
|
{
|
|
u_char *p;
|
|
int bits, i, len;
|
|
|
|
if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
|
|
return (-1);
|
|
if (bitlen > len * NBBY)
|
|
return (-1);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
bits = (bitlen > NBBY) ? NBBY : bitlen;
|
|
*p++ = (1 << bits) - 1;
|
|
bitlen -= bits;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check that the sockaddr is a valid netmask. Returns 0 if the mask
|
|
* is acceptable (i.e. of the form 1...10....0).
|
|
*/
|
|
int
|
|
checkmask(struct sockaddr *sa)
|
|
{
|
|
u_char *mask;
|
|
int i, len;
|
|
|
|
if ((mask = sa_rawaddr(sa, &len)) == NULL)
|
|
return (-1);
|
|
|
|
for (i = 0; i < len; i++)
|
|
if (mask[i] != 0xff)
|
|
break;
|
|
if (i < len) {
|
|
if (~mask[i] & (u_char)(~mask[i] + 1))
|
|
return (-1);
|
|
i++;
|
|
}
|
|
for (; i < len; i++)
|
|
if (mask[i] != 0)
|
|
return (-1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Compare two sockaddrs according to a specified mask. Return zero if
|
|
* `sa1' matches `sa2' when filtered by the netmask in `samask'.
|
|
* If samask is NULL, perform a full comparision.
|
|
*/
|
|
int
|
|
sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
|
|
{
|
|
unsigned char *p1, *p2, *mask;
|
|
int len, i;
|
|
|
|
if (sa1->sa_family != sa2->sa_family ||
|
|
(p1 = sa_rawaddr(sa1, &len)) == NULL ||
|
|
(p2 = sa_rawaddr(sa2, NULL)) == NULL)
|
|
return (1);
|
|
|
|
switch (sa1->sa_family) {
|
|
case AF_INET6:
|
|
if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
|
|
((struct sockaddr_in6 *)sa2)->sin6_scope_id)
|
|
return (1);
|
|
break;
|
|
}
|
|
|
|
/* Simple binary comparison if no mask specified. */
|
|
if (samask == NULL)
|
|
return (memcmp(p1, p2, len));
|
|
|
|
/* Set up the mask, and do a mask-based comparison. */
|
|
if (sa1->sa_family != samask->sa_family ||
|
|
(mask = sa_rawaddr(samask, NULL)) == NULL)
|
|
return (1);
|
|
|
|
for (i = 0; i < len; i++)
|
|
if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return a pointer to the part of the sockaddr that contains the
|
|
* raw address, and set *nbytes to its length in bytes. Returns
|
|
* NULL if the address family is unknown.
|
|
*/
|
|
void *
|
|
sa_rawaddr(struct sockaddr *sa, int *nbytes) {
|
|
void *p;
|
|
int len;
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
|
|
p = &((struct sockaddr_in *)sa)->sin_addr;
|
|
break;
|
|
case AF_INET6:
|
|
len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
|
|
p = &((struct sockaddr_in6 *)sa)->sin6_addr;
|
|
break;
|
|
default:
|
|
p = NULL;
|
|
len = 0;
|
|
}
|
|
|
|
if (nbytes != NULL)
|
|
*nbytes = len;
|
|
return (p);
|
|
}
|
|
|
|
void
|
|
huphandler(int sig)
|
|
{
|
|
got_sighup = 1;
|
|
}
|
|
|
|
void terminate(sig)
|
|
int sig;
|
|
{
|
|
close(mountdlockfd);
|
|
unlink(MOUNTDLOCK);
|
|
rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
|
|
rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
|
|
exit (0);
|
|
}
|