fabfb1a1ee
* fcntl.cc (fcntl_worker): Remove. (fcntl64): Add fault handler. Move fcntl_worker stuff here. Add case for locking and call fhandler's lock method directly. Make sure that F_FLOCK flag isn't set in lock call. (_fcntl): Add fault handler. * fhandler.cc (fhandler_base::fcntl): Drop lock cases. * flock.cc (flock): Add fault handler. Simplify code. Call fhandlers lock method directly instead of fcntl_worker. Add debug output. (lockf): Add fault handler. Call fhandlers lock method directly instead of fcntl_worker. Add debug output. * winsup.h (fcntl_worker): Drop declaration. (fcntl64): Declare.
783 lines
20 KiB
C++
783 lines
20 KiB
C++
/*
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* Copyright (c) 1983, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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#ifndef __CYGWIN__
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__FBSDID("$FreeBSD$");
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#else
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#define __INSIDE_CYGWIN_NET__
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#include "winsup.h"
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#endif
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#ifndef __CYGWIN__
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#include "namespace.h"
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#endif
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#ifndef __CYGWIN__
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#include <rpc/rpc.h>
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#endif
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#ifdef YP
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#ifndef __CYGWIN__
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#include <arpa/nameser.h>
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#include "un-namespace.h"
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#endif
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#ifndef __CYGWIN__
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extern int innetgr( const char *, const char *, const char *, const char * );
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#define max(a, b) ((a > b) ? a : b)
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#else
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#include "wininet.h"
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#include "cygwin/in6.h"
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#ifndef _PATH_HEQUIV
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# define _PATH_HEQUIV "/etc/hosts.equiv"
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#endif
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#define innetgr(a,b,c,d) (0)
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extern int rcmdsh(char **, int, const char *, const char *, const char *,
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const char *);
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extern "C" {
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int cygwin_accept (int, struct sockaddr *, socklen_t *);
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int cygwin_bindresvport_sa (int, struct sockaddr *);
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int cygwin_connect (int, const struct sockaddr *, socklen_t);
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void cygwin_freeaddrinfo (struct addrinfo *);
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const char * cygwin_gai_strerror (int);
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int cygwin_getaddrinfo (const char *, const char *, const struct addrinfo *,
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struct addrinfo **);
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int cygwin_getnameinfo (const struct sockaddr *, socklen_t, char *, size_t,
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char *, size_t, int);
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struct servent *cygwin_getservbyname (const char *, const char *);
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int cygwin_listen (int, int);
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int cygwin_rresvport_af(int *alport, int family);
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int cygwin_select (int, fd_set *, fd_set *, fd_set *, struct timeval *);
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int cygwin_socket (int, int, int);
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int seteuid32 (__uid32_t);
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}
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#endif
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#ifndef __CYGWIN__
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static int __ivaliduser(FILE *, u_int32_t, const char *, const char *);
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static int __ivaliduser_af(FILE *,const void *, const char *, const char *,
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int, int);
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#endif
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static int __ivaliduser_sa(FILE *, const struct sockaddr *, socklen_t,
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const char *, const char *);
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static int __icheckhost(const struct sockaddr *, socklen_t, const char *);
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char paddr[NI_MAXHOST];
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extern "C" int
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cygwin_rcmd_af(char **ahost, in_port_t rport, const char *locuser,
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const char *remuser, const char *cmd, int *fd2p, int af)
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{
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struct addrinfo hints, *res, *ai;
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struct sockaddr_storage from;
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fd_set reads;
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sigset_t oldmask, newmask;
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pid_t pid;
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int s, aport, lport, timo, error;
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char c;//, *p;
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int refused, nres;
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char num[8];
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static char canonnamebuf[INTERNET_MAX_HOST_NAME_LENGTH + 1]; /* is it proper here? */
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#ifndef __CYGWIN__
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/* call rcmdsh() with specified remote shell if appropriate. */
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if (!issetugid() && (p = getenv("RSH"))) {
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struct servent *sp = cygwin_getservbyname("shell", "tcp");
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if (sp && sp->s_port == rport)
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return (rcmdsh(ahost, rport, locuser, remuser,
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cmd, p));
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}
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/* use rsh(1) if non-root and remote port is shell. */
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if (geteuid()) {
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struct servent *sp = cygwin_getservbyname("shell", "tcp");
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if (sp && sp->s_port == rport)
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return (rcmdsh(ahost, rport, locuser, remuser,
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cmd, NULL));
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}
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#endif
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pid = getpid();
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_CANONNAME;
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hints.ai_family = af;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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(void)snprintf(num, sizeof(num), "%d", ntohs(rport));
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error = cygwin_getaddrinfo(*ahost, num, &hints, &res);
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if (error) {
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fprintf(stderr, "rcmd: getaddrinfo: %s\n",
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cygwin_gai_strerror(error));
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if (error == EAI_SYSTEM)
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fprintf(stderr, "rcmd: getaddrinfo: %s\n",
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strerror(errno));
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return (-1);
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}
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if (res->ai_canonname
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&& strlen(res->ai_canonname) + 1 < sizeof(canonnamebuf)) {
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strncpy(canonnamebuf, res->ai_canonname, sizeof(canonnamebuf));
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*ahost = canonnamebuf;
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}
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nres = 0;
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for (ai = res; ai; ai = ai->ai_next)
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nres++;
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ai = res;
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refused = 0;
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sigemptyset(&newmask);
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sigaddset(&newmask, SIGURG);
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sigprocmask(SIG_BLOCK, (const sigset_t *)&newmask, &oldmask);
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for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
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s = cygwin_rresvport_af(&lport, ai->ai_family);
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if (s < 0) {
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if (errno != EAGAIN && ai->ai_next) {
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ai = ai->ai_next;
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continue;
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}
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if (errno == EAGAIN)
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(void)fprintf(stderr,
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"rcmd: socket: All ports in use\n");
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else
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(void)fprintf(stderr, "rcmd: socket: %s\n",
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strerror(errno));
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cygwin_freeaddrinfo(res);
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sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
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NULL);
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return (-1);
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}
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fcntl64(s, F_SETOWN, pid);
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if (cygwin_connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
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break;
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(void)close(s);
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if (errno == EADDRINUSE) {
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lport--;
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continue;
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}
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if (errno == ECONNREFUSED)
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refused = 1;
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if (ai->ai_next == NULL && (!refused || timo > 16)) {
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(void)fprintf(stderr, "%s: %s\n",
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*ahost, strerror(errno));
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cygwin_freeaddrinfo(res);
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sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
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NULL);
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return (-1);
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}
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if (nres > 1) {
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int oerrno = errno;
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cygwin_getnameinfo(ai->ai_addr, ai->ai_addrlen, paddr,
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sizeof(paddr), NULL, 0, NI_NUMERICHOST);
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(void)fprintf(stderr, "connect to address %s: ",
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paddr);
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errno = oerrno;
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perror(0);
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}
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if ((ai = ai->ai_next) == NULL) {
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/* refused && timo <= 16 */
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struct timespec time_to_sleep, time_remaining;
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time_to_sleep.tv_sec = timo;
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time_to_sleep.tv_nsec = 0;
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(void)nanosleep(&time_to_sleep, &time_remaining);
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timo *= 2;
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ai = res;
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refused = 0;
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}
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if (nres > 1) {
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cygwin_getnameinfo(ai->ai_addr, ai->ai_addrlen, paddr,
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sizeof(paddr), NULL, 0, NI_NUMERICHOST);
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fprintf(stderr, "Trying %s...\n", paddr);
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}
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}
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lport--;
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if (fd2p == 0) {
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write(s, "", 1);
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lport = 0;
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} else {
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int s2 = cygwin_rresvport_af(&lport, ai->ai_family), s3;
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socklen_t len = ai->ai_addrlen;
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int nfds;
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if (s2 < 0)
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goto bad;
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cygwin_listen(s2, 1);
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(void)snprintf(num, sizeof(num), "%d", lport);
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if (write(s, num, strlen(num)+1) != (int)strlen(num)+1) {
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(void)fprintf(stderr,
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"rcmd: write (setting up stderr): %s\n",
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strerror(errno));
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(void)close(s2);
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goto bad;
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}
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nfds = max(s, s2)+1;
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if(nfds > FD_SETSIZE) {
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fprintf(stderr, "rcmd: too many files\n");
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(void)close(s2);
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goto bad;
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}
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again:
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FD_ZERO(&reads);
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FD_SET(s, &reads);
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FD_SET(s2, &reads);
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errno = 0;
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if (cygwin_select(nfds, &reads, 0, 0, 0) < 1 || !FD_ISSET(s2, &reads)){
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if (errno != 0)
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(void)fprintf(stderr,
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"rcmd: select (setting up stderr): %s\n",
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strerror(errno));
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else
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(void)fprintf(stderr,
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"select: protocol failure in circuit setup\n");
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(void)close(s2);
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goto bad;
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}
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s3 = cygwin_accept(s2, (struct sockaddr *)&from, &len);
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switch (from.ss_family) {
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case AF_INET:
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aport = ntohs(((struct sockaddr_in *)&from)->sin_port);
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break;
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#ifdef INET6
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case AF_INET6:
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aport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
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break;
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#endif
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default:
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aport = 0; /* error */
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break;
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}
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/*
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* XXX careful for ftp bounce attacks. If discovered, shut them
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* down and check for the real auxiliary channel to connect.
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*/
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if (aport == 20) {
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close(s3);
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goto again;
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}
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(void)close(s2);
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if (s3 < 0) {
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(void)fprintf(stderr,
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"rcmd: accept: %s\n", strerror(errno));
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lport = 0;
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goto bad;
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}
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*fd2p = s3;
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if (aport >= IPPORT_RESERVED || aport < IPPORT_RESERVED / 2) {
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(void)fprintf(stderr,
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"socket: protocol failure in circuit setup.\n");
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goto bad2;
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}
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}
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(void)write(s, locuser, strlen(locuser)+1);
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(void)write(s, remuser, strlen(remuser)+1);
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(void)write(s, cmd, strlen(cmd)+1);
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if (read(s, &c, 1) != 1) {
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(void)fprintf(stderr,
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"rcmd: %s: %s\n", *ahost, strerror(errno));
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goto bad2;
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}
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if (c != 0) {
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while (read(s, &c, 1) == 1) {
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(void)write(STDERR_FILENO, &c, 1);
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if (c == '\n')
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break;
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}
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goto bad2;
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}
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sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
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cygwin_freeaddrinfo(res);
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return (s);
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bad2:
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if (lport)
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(void)close(*fd2p);
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bad:
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(void)close(s);
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sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
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cygwin_freeaddrinfo(res);
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return (-1);
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}
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extern "C" int
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cygwin_rcmd(char **ahost, in_port_t rport, const char *locuser,
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const char *remuser, const char *cmd, int *fd2p)
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{
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return cygwin_rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p,
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AF_INET);
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}
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extern "C" int
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cygwin_rresvport_af(int *alport, int family)
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|
{
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int s;
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struct sockaddr_storage ss;
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u_short *sport;
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memset(&ss, 0, sizeof(ss));
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ss.ss_family = family;
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switch (family) {
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case AF_INET:
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sport = &((struct sockaddr_in *)&ss)->sin_port;
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((struct sockaddr_in *)&ss)->sin_addr.s_addr = INADDR_ANY;
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break;
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#ifdef INET6
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case AF_INET6:
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sport = &((struct sockaddr_in6 *)&ss)->sin6_port;
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((struct sockaddr_in6 *)&ss)->sin6_addr = in6addr_any;
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break;
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|
#endif
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|
default:
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|
errno = EAFNOSUPPORT;
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|
return -1;
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}
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|
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s = cygwin_socket(ss.ss_family, SOCK_STREAM, 0);
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|
if (s < 0)
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|
return (-1);
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|
#if 0 /* compat_exact_traditional_rresvport_semantics */
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|
sin.sin_port = htons((u_short)*alport);
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|
if (_bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
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|
return (s);
|
|
if (errno != EADDRINUSE) {
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|
(void)_close(s);
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|
return (-1);
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|
}
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|
#endif
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|
*sport = 0;
|
|
if (cygwin_bindresvport_sa(s, (struct sockaddr *)&ss) == -1) {
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|
(void)close(s);
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|
return (-1);
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|
}
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|
*alport = (int)ntohs(*sport);
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|
return (s);
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|
}
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|
|
|
extern "C" int
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|
cygwin_rresvport(int *port)
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|
{
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|
return cygwin_rresvport_af(port, AF_INET);
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|
}
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|
|
|
int __check_rhosts_file = 1;
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|
char *__rcmd_errstr;
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|
|
|
/*
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|
* AF independent extension of iruserok.
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|
*
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|
* Returns 0 if ok, -1 if not ok.
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|
*/
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|
extern "C" int
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|
iruserok_sa(const void *ra, int rlen, int superuser, const char *ruser,
|
|
const char *luser)
|
|
{
|
|
const char *cp;
|
|
struct __stat64 sbuf;
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|
struct passwd *pwd;
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|
FILE *hostf;
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|
uid_t uid;
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|
int first;
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|
char pbuf[MAXPATHLEN];
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|
const struct sockaddr *raddr;
|
|
struct sockaddr_storage ss;
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|
|
|
/* avoid alignment issue */
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|
if (rlen > (int) sizeof(ss))
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|
return(-1);
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|
memcpy(&ss, ra, rlen);
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|
raddr = (struct sockaddr *)&ss;
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|
|
|
first = 1;
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|
hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "rt");
|
|
again:
|
|
if (hostf) {
|
|
if (__ivaliduser_sa(hostf, raddr, rlen, luser, ruser) == 0) {
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|
(void)fclose(hostf);
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|
return (0);
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|
}
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|
(void)fclose(hostf);
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|
}
|
|
if (first == 1 && (__check_rhosts_file || superuser)) {
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|
first = 0;
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|
if ((pwd = getpwnam(luser)) == NULL)
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|
return (-1);
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|
(void)strcpy(pbuf, pwd->pw_dir);
|
|
(void)strcat(pbuf, "/.rhosts");
|
|
|
|
/*
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|
* Change effective uid while opening .rhosts. If root and
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|
* reading an NFS mounted file system, can't read files that
|
|
* are protected read/write owner only.
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|
*/
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|
uid = geteuid32();
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|
(void)seteuid32(pwd->pw_uid);
|
|
hostf = fopen(pbuf, "rt");
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|
(void)seteuid32(uid);
|
|
|
|
if (hostf == NULL)
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|
return (-1);
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|
/*
|
|
* If not a regular file, or is owned by someone other than
|
|
* user or root or if writeable by anyone but the owner, quit.
|
|
*/
|
|
cp = NULL;
|
|
if (lstat64(pbuf, &sbuf) < 0)
|
|
cp = ".rhosts lstat failed";
|
|
else if (!S_ISREG(sbuf.st_mode))
|
|
cp = ".rhosts not regular file";
|
|
else if (fstat64(fileno(hostf), &sbuf) < 0)
|
|
cp = ".rhosts fstat failed";
|
|
else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
|
|
cp = "bad .rhosts owner";
|
|
else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
|
|
cp = ".rhosts writeable by other than owner";
|
|
/* If there were any problems, quit. */
|
|
if (cp) {
|
|
__rcmd_errstr = (char *) cp;
|
|
(void)fclose(hostf);
|
|
return (-1);
|
|
}
|
|
goto again;
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* New .rhosts strategy: We are passed an ip address. We spin through
|
|
* hosts.equiv and .rhosts looking for a match. When the .rhosts only
|
|
* has ip addresses, we don't have to trust a nameserver. When it
|
|
* contains hostnames, we spin through the list of addresses the nameserver
|
|
* gives us and look for a match.
|
|
*
|
|
* Returns 0 if ok, -1 if not ok.
|
|
*/
|
|
extern "C" int
|
|
iruserok(unsigned long raddr, int superuser, const char *ruser,
|
|
const char *luser)
|
|
{
|
|
struct sockaddr_in sin;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
|
|
return iruserok_sa((struct sockaddr *)&sin, sizeof(struct sockaddr_in),
|
|
superuser, ruser, luser);
|
|
}
|
|
|
|
extern "C" int
|
|
ruserok(const char *rhost, int superuser, const char *ruser, const char *luser)
|
|
{
|
|
struct addrinfo hints, *res, *r;
|
|
int error;
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
|
|
error = cygwin_getaddrinfo(rhost, "0", &hints, &res);
|
|
if (error)
|
|
return (-1);
|
|
|
|
for (r = res; r; r = r->ai_next) {
|
|
if (iruserok_sa(r->ai_addr, r->ai_addrlen, superuser, ruser,
|
|
luser) == 0) {
|
|
cygwin_freeaddrinfo(res);
|
|
return (0);
|
|
}
|
|
}
|
|
cygwin_freeaddrinfo(res);
|
|
return (-1);
|
|
}
|
|
|
|
#ifndef __CYGWIN__
|
|
/*
|
|
* XXX
|
|
* Don't make static, used by lpd(8).
|
|
*
|
|
* Returns 0 if ok, -1 if not ok.
|
|
*/
|
|
static int
|
|
__ivaliduser(FILE *hostf, u_int32_t raddr, const char *luser, const char *ruser)
|
|
{
|
|
struct sockaddr_in sin;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
|
|
return __ivaliduser_sa(hostf, (struct sockaddr *)&sin,
|
|
sizeof(struct sockaddr_in), luser, ruser);
|
|
}
|
|
|
|
/*
|
|
* Returns 0 if ok, -1 if not ok.
|
|
*
|
|
* XXX obsolete API.
|
|
*/
|
|
static int
|
|
__ivaliduser_af(FILE *hostf, const void *raddr, const char *luser,
|
|
const char *ruser, int af, int len)
|
|
{
|
|
struct sockaddr *sa = NULL;
|
|
struct sockaddr_in *sin = NULL;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6 = NULL;
|
|
#endif
|
|
struct sockaddr_storage ss;
|
|
int salen = 0;
|
|
|
|
memset(&ss, 0, sizeof(ss));
|
|
switch (af) {
|
|
case AF_INET:
|
|
if (len != sizeof(sin->sin_addr))
|
|
return -1;
|
|
sin = (struct sockaddr_in *)&ss;
|
|
sin->sin_family = AF_INET;
|
|
salen = sizeof(struct sockaddr_in);
|
|
memcpy(&sin->sin_addr, raddr, sizeof(sin->sin_addr));
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (len != sizeof(sin6->sin6_addr))
|
|
return -1;
|
|
/* you will lose scope info */
|
|
sin6 = (struct sockaddr_in6 *)&ss;
|
|
sin6->sin6_family = AF_INET6;
|
|
salen = sizeof(struct sockaddr_in6);
|
|
memcpy(&sin6->sin6_addr, raddr, sizeof(sin6->sin6_addr));
|
|
break;
|
|
#endif
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
sa = (struct sockaddr *)&ss;
|
|
return __ivaliduser_sa(hostf, sa, salen, luser, ruser);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
__ivaliduser_sa(FILE *hostf, const struct sockaddr *raddr, socklen_t salen,
|
|
const char *luser, const char *ruser)
|
|
{
|
|
char *user, *p;
|
|
int ch;
|
|
char buf[MAXHOSTNAMELEN + 128]; /* host + login */
|
|
char hname[MAXHOSTNAMELEN];
|
|
/* Presumed guilty until proven innocent. */
|
|
int userok = 0, hostok = 0;
|
|
#ifdef YP
|
|
char *ypdomain;
|
|
|
|
if (yp_get_default_domain(&ypdomain))
|
|
ypdomain = NULL;
|
|
#else
|
|
#define ypdomain NULL
|
|
#endif
|
|
/* We need to get the damn hostname back for netgroup matching. */
|
|
if (cygwin_getnameinfo(raddr, salen, hname, sizeof(hname), NULL, 0,
|
|
NI_NAMEREQD) != 0)
|
|
hname[0] = '\0';
|
|
|
|
while (fgets(buf, sizeof(buf), hostf)) {
|
|
p = buf;
|
|
/* Skip lines that are too long. */
|
|
if (strchr(p, '\n') == NULL) {
|
|
while ((ch = getc(hostf)) != '\n' && ch != EOF);
|
|
continue;
|
|
}
|
|
if (*p == '\n' || *p == '#') {
|
|
/* comment... */
|
|
continue;
|
|
}
|
|
while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
|
|
*p = isupper((unsigned char)*p) ? tolower((unsigned char)*p) : *p;
|
|
p++;
|
|
}
|
|
if (*p == ' ' || *p == '\t') {
|
|
*p++ = '\0';
|
|
while (*p == ' ' || *p == '\t')
|
|
p++;
|
|
user = p;
|
|
while (*p != '\n' && *p != ' ' &&
|
|
*p != '\t' && *p != '\0')
|
|
p++;
|
|
} else
|
|
user = p;
|
|
*p = '\0';
|
|
/*
|
|
* Do +/- and +@/-@ checking. This looks really nasty,
|
|
* but it matches SunOS's behavior so far as I can tell.
|
|
*/
|
|
switch(buf[0]) {
|
|
case '+':
|
|
if (!buf[1]) { /* '+' matches all hosts */
|
|
hostok = 1;
|
|
break;
|
|
}
|
|
if (buf[1] == '@') /* match a host by netgroup */
|
|
hostok = hname[0] != '\0' &&
|
|
innetgr(&buf[2], hname, NULL, ypdomain);
|
|
else /* match a host by addr */
|
|
hostok = __icheckhost(raddr, salen,
|
|
(char *)&buf[1]);
|
|
break;
|
|
case '-': /* reject '-' hosts and all their users */
|
|
if (buf[1] == '@') {
|
|
if (hname[0] == '\0' ||
|
|
innetgr(&buf[2], hname, NULL, ypdomain))
|
|
return(-1);
|
|
} else {
|
|
if (__icheckhost(raddr, salen,
|
|
(char *)&buf[1]))
|
|
return(-1);
|
|
}
|
|
break;
|
|
default: /* if no '+' or '-', do a simple match */
|
|
hostok = __icheckhost(raddr, salen, buf);
|
|
break;
|
|
}
|
|
switch(*user) {
|
|
case '+':
|
|
if (!*(user+1)) { /* '+' matches all users */
|
|
userok = 1;
|
|
break;
|
|
}
|
|
if (*(user+1) == '@') /* match a user by netgroup */
|
|
userok = innetgr(user+2, NULL, ruser, ypdomain);
|
|
else /* match a user by direct specification */
|
|
userok = !(strcmp(ruser, user+1));
|
|
break;
|
|
case '-': /* if we matched a hostname, */
|
|
if (hostok) { /* check for user field rejections */
|
|
if (!*(user+1))
|
|
return(-1);
|
|
if (*(user+1) == '@') {
|
|
if (innetgr(user+2, NULL,
|
|
ruser, ypdomain))
|
|
return(-1);
|
|
} else {
|
|
if (!strcmp(ruser, user+1))
|
|
return(-1);
|
|
}
|
|
}
|
|
break;
|
|
default: /* no rejections: try to match the user */
|
|
if (hostok)
|
|
userok = !(strcmp(ruser,*user ? user : luser));
|
|
break;
|
|
}
|
|
if (hostok && userok)
|
|
return(0);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Returns "true" if match, 0 if no match.
|
|
*/
|
|
static int
|
|
__icheckhost(const struct sockaddr *raddr, socklen_t salen, const char *lhost)
|
|
{
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_in6 *sin6;
|
|
struct addrinfo hints, *res, *r;
|
|
int error;
|
|
char h1[NI_MAXHOST], h2[NI_MAXHOST];
|
|
|
|
if (raddr->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)raddr;
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
|
|
sizeof(sin.sin_addr));
|
|
raddr = (struct sockaddr *)&sin;
|
|
salen = sizeof(struct sockaddr_in);
|
|
}
|
|
}
|
|
|
|
h1[0] = '\0';
|
|
if (cygwin_getnameinfo(raddr, salen, h1, sizeof(h1), NULL, 0,
|
|
NI_NUMERICHOST) != 0)
|
|
return (0);
|
|
|
|
/* Resolve laddr into sockaddr */
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = raddr->sa_family;
|
|
hints.ai_socktype = SOCK_DGRAM; /*XXX dummy*/
|
|
res = NULL;
|
|
error = cygwin_getaddrinfo(lhost, "0", &hints, &res);
|
|
if (error)
|
|
return (0);
|
|
|
|
for (r = res; r ; r = r->ai_next) {
|
|
h2[0] = '\0';
|
|
if (cygwin_getnameinfo(r->ai_addr, r->ai_addrlen, h2, sizeof(h2),
|
|
NULL, 0, NI_NUMERICHOST) != 0)
|
|
continue;
|
|
if (strcmp(h1, h2) == 0) {
|
|
cygwin_freeaddrinfo(res);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/* No match. */
|
|
cygwin_freeaddrinfo(res);
|
|
return (0);
|
|
}
|