diff options
Diffstat (limited to 'sbin/mountd/mountd.c')
-rw-r--r-- | sbin/mountd/mountd.c | 2444 |
1 files changed, 0 insertions, 2444 deletions
diff --git a/sbin/mountd/mountd.c b/sbin/mountd/mountd.c deleted file mode 100644 index 5940c4d..0000000 --- a/sbin/mountd/mountd.c +++ /dev/null @@ -1,2444 +0,0 @@ -/* - * Copyright (c) 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Herb Hasler and Rick Macklem at The University of Guelph. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef lint -static const char copyright[] = -"@(#) Copyright (c) 1989, 1993\n\ - The Regents of the University of California. All rights reserved.\n"; -#endif /*not lint*/ - -#ifndef lint -#if 0 -static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95"; -#endif -static const char rcsid[] = - "$FreeBSD$"; -#endif /*not lint*/ - -#include <sys/param.h> -#include <sys/mount.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <sys/syslog.h> -#include <sys/sysctl.h> -#include <sys/linker.h> -#include <sys/module.h> - -#include <rpc/rpc.h> -#include <rpc/pmap_clnt.h> -#include <rpc/pmap_prot.h> -#include <rpcsvc/mount.h> -#include <nfs/rpcv2.h> -#include <nfs/nfsproto.h> -#include <nfsserver/nfs.h> -#include <ufs/ufs/ufsmount.h> -#include <fs/msdosfs/msdosfsmount.h> -#include <fs/ntfs/ntfsmount.h> -#include <isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */ - -#include <arpa/inet.h> - -#include <ctype.h> -#include <err.h> -#include <errno.h> -#include <grp.h> -#include <netdb.h> -#include <pwd.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include "pathnames.h" - -#ifdef DEBUG -#include <stdarg.h> -#endif - -#ifndef MOUNTDLOCK -#define MOUNTDLOCK "/var/run/mountd.lock" -#endif - -/* - * Structures for keeping the mount list and export list - */ -struct mountlist { - struct mountlist *ml_next; - char ml_host[RPCMNT_NAMELEN+1]; - char ml_dirp[RPCMNT_PATHLEN+1]; -}; - -struct dirlist { - struct dirlist *dp_left; - struct dirlist *dp_right; - int dp_flag; - struct hostlist *dp_hosts; /* List of hosts this dir exported to */ - char dp_dirp[1]; /* Actually malloc'd to size of dir */ -}; -/* dp_flag bits */ -#define DP_DEFSET 0x1 -#define DP_HOSTSET 0x2 - -struct exportlist { - struct exportlist *ex_next; - struct dirlist *ex_dirl; - struct dirlist *ex_defdir; - int ex_flag; - fsid_t ex_fs; - char *ex_fsdir; - char *ex_indexfile; -}; -/* ex_flag bits */ -#define EX_LINKED 0x1 - -struct netmsk { - struct sockaddr_storage nt_net; - struct sockaddr_storage nt_mask; - char *nt_name; -}; - -union grouptypes { - struct addrinfo *gt_addrinfo; - struct netmsk gt_net; -}; - -struct grouplist { - int gr_type; - union grouptypes gr_ptr; - struct grouplist *gr_next; -}; -/* Group types */ -#define GT_NULL 0x0 -#define GT_HOST 0x1 -#define GT_NET 0x2 -#define GT_DEFAULT 0x3 -#define GT_IGNORE 0x5 - -struct hostlist { - int ht_flag; /* Uses DP_xx bits */ - struct grouplist *ht_grp; - struct hostlist *ht_next; -}; - -struct fhreturn { - int fhr_flag; - int fhr_vers; - nfsfh_t fhr_fh; -}; - -/* Global defs */ -char *add_expdir(struct dirlist **, char *, int); -void add_dlist(struct dirlist **, struct dirlist *, - struct grouplist *, int); -void add_mlist(char *, char *); -int check_dirpath(char *); -int check_options(struct dirlist *); -int checkmask(struct sockaddr *sa); -int chk_host(struct dirlist *, struct sockaddr *, int *, int *); -void del_mlist(char *hostp, char *dirp); -struct dirlist *dirp_search(struct dirlist *, char *); -int do_mount(struct exportlist *, struct grouplist *, int, - struct xucred *, char *, int, struct statfs *); -int do_opt(char **, char **, struct exportlist *, struct grouplist *, - int *, int *, struct xucred *); -struct exportlist *ex_search(fsid_t *); -struct exportlist *get_exp(void); -void free_dir(struct dirlist *); -void free_exp(struct exportlist *); -void free_grp(struct grouplist *); -void free_host(struct hostlist *); -void get_exportlist(void); -int get_host(char *, struct grouplist *, struct grouplist *); -struct hostlist *get_ht(void); -int get_line(void); -void get_mountlist(void); -int get_net(char *, struct netmsk *, int); -void getexp_err(struct exportlist *, struct grouplist *); -struct grouplist *get_grp(void); -void hang_dirp(struct dirlist *, struct grouplist *, - struct exportlist *, int); -void huphandler(int sig); -int makemask(struct sockaddr_storage *ssp, int bitlen); -void mntsrv(struct svc_req *, SVCXPRT *); -void nextfield(char **, char **); -void out_of_mem(void); -void parsecred(char *, struct xucred *); -int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *); -void *sa_rawaddr(struct sockaddr *sa, int *nbytes); -int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, - struct sockaddr *samask); -int scan_tree(struct dirlist *, struct sockaddr *); -static void usage(void); -int xdr_dir(XDR *, char *); -int xdr_explist(XDR *, caddr_t); -int xdr_fhs(XDR *, caddr_t); -int xdr_mlist(XDR *, caddr_t); -void terminate(int); - -struct exportlist *exphead; -struct mountlist *mlhead; -struct grouplist *grphead; -char exname[MAXPATHLEN]; -struct xucred def_anon = { - XUCRED_VERSION, - (uid_t)-2, - 1, - { (gid_t)-2 }, - NULL -}; -int force_v2 = 0; -int resvport_only = 1; -int dir_only = 1; -int log = 0; -int got_sighup = 0; - -int opt_flags; -static int have_v6 = 1; -#ifdef NI_WITHSCOPEID -static const int ninumeric = NI_NUMERICHOST | NI_WITHSCOPEID; -#else -static const int ninumeric = NI_NUMERICHOST; -#endif - -int mountdlockfd; -/* Bits for opt_flags above */ -#define OP_MAPROOT 0x01 -#define OP_MAPALL 0x02 -/* 0x4 free */ -#define OP_MASK 0x08 -#define OP_NET 0x10 -#define OP_ALLDIRS 0x40 -#define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ -#define OP_MASKLEN 0x200 - -#ifdef DEBUG -int debug = 1; -void SYSLOG(int, const char *, ...) __printflike(2, 3); -#define syslog SYSLOG -#else -int debug = 0; -#endif - -/* - * Mountd server for NFS mount protocol as described in: - * NFS: Network File System Protocol Specification, RFC1094, Appendix A - * The optional arguments are the exports file name - * default: _PATH_EXPORTS - * and "-n" to allow nonroot mount. - */ -int -main(argc, argv) - int argc; - char **argv; -{ - fd_set readfds; - SVCXPRT *udptransp, *tcptransp, *udp6transp, *tcp6transp; - struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf; - int udpsock, tcpsock, udp6sock, tcp6sock; - int xcreated = 0, s; - int one = 1; - int c; - - udp6conf = tcp6conf = NULL; - udp6sock = tcp6sock = NULL; - - /* Check that another mountd isn't already running. */ - if ((mountdlockfd = (open(MOUNTDLOCK, O_RDONLY|O_CREAT, 0444))) == -1) - err(1, "%s", MOUNTDLOCK); - - if(flock(mountdlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) - errx(1, "another rpc.mountd is already running. Aborting"); - s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); - if (s < 0) - have_v6 = 0; - else - close(s); - if (modfind("nfsserver") < 0) { - /* Not present in kernel, try loading it */ - if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0) - errx(1, "NFS server is not available or loadable"); - } - - while ((c = getopt(argc, argv, "2dlnr")) != -1) - switch (c) { - case '2': - force_v2 = 1; - break; - case 'n': - resvport_only = 0; - break; - case 'r': - dir_only = 0; - break; - case 'd': - debug = debug ? 0 : 1; - break; - case 'l': - log = 1; - break; - default: - usage(); - }; - argc -= optind; - argv += optind; - grphead = (struct grouplist *)NULL; - exphead = (struct exportlist *)NULL; - mlhead = (struct mountlist *)NULL; - if (argc == 1) { - strncpy(exname, *argv, MAXPATHLEN-1); - exname[MAXPATHLEN-1] = '\0'; - } else - strcpy(exname, _PATH_EXPORTS); - openlog("mountd", LOG_PID, LOG_DAEMON); - if (debug) - warnx("getting export list"); - get_exportlist(); - if (debug) - warnx("getting mount list"); - get_mountlist(); - if (debug) - warnx("here we go"); - if (debug == 0) { - daemon(0, 0); - signal(SIGINT, SIG_IGN); - signal(SIGQUIT, SIG_IGN); - } - signal(SIGHUP, huphandler); - signal(SIGTERM, terminate); - { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w"); - if (pidfile != NULL) { - fprintf(pidfile, "%d\n", getpid()); - fclose(pidfile); - } - } - rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); - rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); - udpsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - tcpsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); - udpconf = getnetconfigent("udp"); - tcpconf = getnetconfigent("tcp"); - if (!have_v6) - goto skip_v6; - udp6sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); - tcp6sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP); - /* - * We're doing host-based access checks here, so don't allow - * v4-in-v6 to confuse things. The kernel will disable it - * by default on NFS sockets too. - */ - if (udp6sock != -1 && setsockopt(udp6sock, IPPROTO_IPV6, - IPV6_BINDV6ONLY, &one, sizeof one) < 0){ - syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket"); - exit(1); - } - if (tcp6sock != -1 && setsockopt(tcp6sock, IPPROTO_IPV6, - IPV6_BINDV6ONLY, &one, sizeof one) < 0){ - syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket"); - exit(1); - } - udp6conf = getnetconfigent("udp6"); - tcp6conf = getnetconfigent("tcp6"); - -skip_v6: - if (!resvport_only) { - if (sysctlbyname("vfs.nfsrv.nfs_privport", NULL, NULL, - &resvport_only, sizeof(resvport_only)) != 0 && - errno != ENOENT) { - syslog(LOG_ERR, "sysctl: %m"); - 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; -{ - 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); - 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); -} - -char *line; -int linesize; -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 - * filesystems. - * XXX: Should know how to handle all local exportable filesystems - * 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; - } else while (grp) { - hp = get_ht(); - 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(); - 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; - } -} - -/* - * 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 (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 filesystems 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; - size_t len; - int totlen, cont_line; - - /* - * Loop around ignoring blank lines and getting all continuation lines. - */ - p = line; - totlen = 0; - do { - if ((p = fgetln(exp_file, &len)) == NULL) - return (0); - 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++; - } - if (linesize < len + totlen + 1) { - linesize = len + totlen + 1; - line = realloc(line, linesize); - if (line == NULL) - out_of_mem(); - } - memcpy(line + totlen, p, len); - totlen += len; - line[totlen] = '\0'; - } 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]; - - cr->cr_version = XUCRED_VERSION; - /* - * 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)) { - syslog(LOG_ERR, "-mapall and -maproot 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); -} |