86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
|
|
* This program can be called via a remote shell command to find out if the
|
|
* hostname and address are properly recognized, if username lookup works,
|
|
* and (SysV only) if the TLI on top of IP heuristics work.
|
|
*
|
|
* Example: "rsh host /some/where/try-from".
|
|
*
|
|
* Diagnostics are reported through syslog(3) and redirected to stderr.
|
|
*
|
|
* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#) try-from.c 1.2 94/12/28 17:42:55";
|
|
#endif
|
|
|
|
/* System libraries. */
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <syslog.h>
|
|
#include <string.h>
|
|
|
|
#ifdef TLI
|
|
#include <sys/tiuser.h>
|
|
#include <stropts.h>
|
|
#endif
|
|
|
|
#ifndef STDIN_FILENO
|
|
#define STDIN_FILENO 0
|
|
#endif
|
|
|
|
/* Local stuff. */
|
|
|
|
#include "tcpd.h"
|
|
|
|
int allow_severity = SEVERITY; /* run-time adjustable */
|
|
int deny_severity = LOG_WARNING; /* ditto */
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct request_info request;
|
|
char buf[BUFSIZ];
|
|
char *cp;
|
|
|
|
/*
|
|
* Simplify the process name, just like tcpd would.
|
|
*/
|
|
if ((cp = strrchr(argv[0], '/')) != 0)
|
|
argv[0] = cp + 1;
|
|
|
|
/*
|
|
* Turn on the "IP-underneath-TLI" detection heuristics.
|
|
*/
|
|
#ifdef TLI
|
|
if (ioctl(0, I_FIND, "timod") == 0)
|
|
ioctl(0, I_PUSH, "timod");
|
|
#endif /* TLI */
|
|
|
|
/*
|
|
* Look up the endpoint information.
|
|
*/
|
|
request_init(&request, RQ_DAEMON, argv[0], RQ_FILE, STDIN_FILENO, 0);
|
|
(void) fromhost(&request);
|
|
|
|
/*
|
|
* Show some results. Name and address information is looked up when we
|
|
* ask for it.
|
|
*/
|
|
|
|
#define EXPAND(str) percent_x(buf, sizeof(buf), str, &request)
|
|
|
|
puts(EXPAND("client address (%%a): %a"));
|
|
puts(EXPAND("client hostname (%%n): %n"));
|
|
puts(EXPAND("client username (%%u): %u"));
|
|
puts(EXPAND("client info (%%c): %c"));
|
|
puts(EXPAND("server address (%%A): %A"));
|
|
puts(EXPAND("server hostname (%%N): %N"));
|
|
puts(EXPAND("server process (%%d): %d"));
|
|
puts(EXPAND("server info (%%s): %s"));
|
|
|
|
return (0);
|
|
}
|