/*
* 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 */
int
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);
}