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    Length: 2427 (0x97b)
    Types: TextFile
    Names: »miscd.c«

└─⟦4f9d7c866⟧ Bits:30007245 EUUGD6: Sikkerheds distributionen
    └─⟦62b59102f⟧ »./log_tcp/3.1.tar.Z« 
        └─⟦1de3ed35f⟧ 
            └─⟦this⟧ »log_tcp/miscd.c« 

TextFile

 /*
  * Front end to the ULTRIX miscd service. The front end logs the remote host
  * name and then invokes the real miscd daemon. Install as "/usr/etc/miscd",
  * after moving the real miscd daemon to the "/usr/etc/..." directory.
  * Connections and diagnostics are logged through syslog(3).
  * 
  * The Ultrix miscd program implements (among others) the systat service, which
  * pipes the output from who(1) to stdout. This information is potentially
  * useful to systems crackers.
  * 
  * Compile with -DHOSTS_ACCESS in order to enable access control. See the
  * hosts_access(5) manual page for details.
  * 
  * Compile with -DPARANOID if service should be refused to hosts that pretend
  * to have someone elses host name. This gives some protection against rsh
  * and rlogin attacks that involve compromised domain name servers.
  * 
  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  */

#ifndef lint
static char sccsid[] = "@(#) miscd.c 1.2 91/10/02 23:01:43";
#endif

/* System libraries. */

#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#include <syslog.h>

/* Local stuff. */

#include "log_tcp.h"

/* The following specifies where the vendor-provided daemon should go. */

#define REAL_DAEMON	"/usr/etc/.../miscd"

main(argc, argv)
int     argc;
char  **argv;
{
    struct from_host from;
    int     from_stat;

    /*
     * Open a channel to the syslog daemon. Older versions of openlog()
     * require only two arguments.
     */

#ifdef LOG_MAIL
    (void) openlog(argv[0], LOG_PID, FACILITY);
#else
    (void) openlog(argv[0], LOG_PID);
#endif

    /*
     * Find out and verify the remote host name. Sites concerned with
     * security may choose to refuse connections from hosts that pretend to
     * have someone elses host name.
     */

    from_stat = fromhost(&from);
#ifdef PARANOID
    if (from_stat == -1)
	refuse(&from);
#endif

    /*
     * Check whether this host can access the service in argv[0]. The
     * access-control code invokes optional shell commands as specified in
     * the access-control tables.
     */

#ifdef HOSTS_ACCESS
    if (!hosts_access(argv[0], from.source))
	refuse(&from);
#endif

    /* Report remote host name and invoke the real daemon program. */

    syslog(LOG_INFO, "connect from %s", from.source);
    (void) execv(REAL_DAEMON, argv);
    syslog(LOG_ERR, "%s: %m", REAL_DAEMON);
    return (1);
}