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