mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
60caaee242
a number of assumptions related to the parsing of options in /etc/exports, and missed a few necessary new error checks. The main problems related to netmasks: an IPv6 network address missing a netmask would result in the filesystem being exported to the whole IPv6 world, non-continuous netmasks would be made continuous without any warnings, and nothing prevented you specifying an IPv4 mask with an IPv6 address. This change addresses these issues. As a side-effect we now store netmasks in sockaddr structs (this matches the kernel interface, and is closer to the way it used to be). Add a flag OP_HAVEMASK to keep track of whether or not we have successfully got a mask from any source. Replace some mask-related helper functions with versions that use the sockaddr-based masks. Also tidy up get_net() and fix the code that interprets IPv4 partial networks such as "127.1" as network rather than host addresses. Properly zero out some structures that were ending up partially containing junk from the stack, fix a few formatting issues, and add a comment noting some assumptions about export arguments.
2457 lines
56 KiB
C
2457 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 <msdosfs/msdosfsmount.h>
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#include <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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if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL ||
|
|
(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,
|
|
mntsrv, udpconf))
|
|
syslog(LOG_WARNING, "can't register UDP RPCMNT_VER1 service");
|
|
else
|
|
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 mfs_args ma;
|
|
struct msdosfs_args da;
|
|
struct ntfs_args na;
|
|
} targs;
|
|
|
|
if (!strcmp(fsp->f_fstypename, "mfs") ||
|
|
!strcmp(fsp->f_fstypename, "ufs") ||
|
|
!strcmp(fsp->f_fstypename, "msdos") ||
|
|
!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)
|
|
syslog(LOG_ERR, "can't delete exports for %s",
|
|
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 addrinfo *ai;
|
|
struct export_args *eap;
|
|
char *cp = NULL;
|
|
int done;
|
|
char savedc = '\0';
|
|
union {
|
|
struct ufs_args ua;
|
|
struct iso_args ia;
|
|
struct mfs_args ma;
|
|
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';
|
|
}
|
|
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;
|
|
char *name, *p, *prefp;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr *sa;
|
|
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;
|
|
}
|
|
|
|
if ((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;
|
|
} else 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)
|
|
goto fail;
|
|
if (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;
|
|
} else
|
|
sa = ai->ai_addr;
|
|
} else
|
|
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--;
|
|
}
|
|
*++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);
|
|
}
|