17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * This program can be called via a remote shell command to find out if the 37c478bd9Sstevel@tonic-gate * hostname and address are properly recognized, if username lookup works, 47c478bd9Sstevel@tonic-gate * and (SysV only) if the TLI on top of IP heuristics work. 57c478bd9Sstevel@tonic-gate * 67c478bd9Sstevel@tonic-gate * Example: "rsh host /some/where/try-from". 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * Diagnostics are reported through syslog(3) and redirected to stderr. 97c478bd9Sstevel@tonic-gate * 107c478bd9Sstevel@tonic-gate * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands. 117c478bd9Sstevel@tonic-gate */ 127c478bd9Sstevel@tonic-gate 137c478bd9Sstevel@tonic-gate #ifndef lint 147c478bd9Sstevel@tonic-gate static char sccsid[] = "@(#) try-from.c 1.2 94/12/28 17:42:55"; 157c478bd9Sstevel@tonic-gate #endif 167c478bd9Sstevel@tonic-gate 177c478bd9Sstevel@tonic-gate /* System libraries. */ 187c478bd9Sstevel@tonic-gate 197c478bd9Sstevel@tonic-gate #include <sys/types.h> 207c478bd9Sstevel@tonic-gate #include <stdio.h> 217c478bd9Sstevel@tonic-gate #include <syslog.h> 227c478bd9Sstevel@tonic-gate #include <string.h> 237c478bd9Sstevel@tonic-gate 247c478bd9Sstevel@tonic-gate #ifdef TLI 257c478bd9Sstevel@tonic-gate #include <sys/tiuser.h> 267c478bd9Sstevel@tonic-gate #include <stropts.h> 277c478bd9Sstevel@tonic-gate #endif 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #ifndef STDIN_FILENO 307c478bd9Sstevel@tonic-gate #define STDIN_FILENO 0 317c478bd9Sstevel@tonic-gate #endif 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate /* Local stuff. */ 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate #include "tcpd.h" 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate int allow_severity = SEVERITY; /* run-time adjustable */ 387c478bd9Sstevel@tonic-gate int deny_severity = LOG_WARNING; /* ditto */ 397c478bd9Sstevel@tonic-gate 40*9455584cSIgor Kozhukhov int 417c478bd9Sstevel@tonic-gate main(argc, argv) 427c478bd9Sstevel@tonic-gate int argc; 437c478bd9Sstevel@tonic-gate char **argv; 447c478bd9Sstevel@tonic-gate { 457c478bd9Sstevel@tonic-gate struct request_info request; 467c478bd9Sstevel@tonic-gate char buf[BUFSIZ]; 477c478bd9Sstevel@tonic-gate char *cp; 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate /* 507c478bd9Sstevel@tonic-gate * Simplify the process name, just like tcpd would. 517c478bd9Sstevel@tonic-gate */ 527c478bd9Sstevel@tonic-gate if ((cp = strrchr(argv[0], '/')) != 0) 537c478bd9Sstevel@tonic-gate argv[0] = cp + 1; 547c478bd9Sstevel@tonic-gate 557c478bd9Sstevel@tonic-gate /* 567c478bd9Sstevel@tonic-gate * Turn on the "IP-underneath-TLI" detection heuristics. 577c478bd9Sstevel@tonic-gate */ 587c478bd9Sstevel@tonic-gate #ifdef TLI 597c478bd9Sstevel@tonic-gate if (ioctl(0, I_FIND, "timod") == 0) 607c478bd9Sstevel@tonic-gate ioctl(0, I_PUSH, "timod"); 617c478bd9Sstevel@tonic-gate #endif /* TLI */ 627c478bd9Sstevel@tonic-gate 637c478bd9Sstevel@tonic-gate /* 647c478bd9Sstevel@tonic-gate * Look up the endpoint information. 657c478bd9Sstevel@tonic-gate */ 667c478bd9Sstevel@tonic-gate request_init(&request, RQ_DAEMON, argv[0], RQ_FILE, STDIN_FILENO, 0); 677c478bd9Sstevel@tonic-gate (void) fromhost(&request); 687c478bd9Sstevel@tonic-gate 697c478bd9Sstevel@tonic-gate /* 707c478bd9Sstevel@tonic-gate * Show some results. Name and address information is looked up when we 717c478bd9Sstevel@tonic-gate * ask for it. 727c478bd9Sstevel@tonic-gate */ 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate #define EXPAND(str) percent_x(buf, sizeof(buf), str, &request) 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate puts(EXPAND("client address (%%a): %a")); 777c478bd9Sstevel@tonic-gate puts(EXPAND("client hostname (%%n): %n")); 787c478bd9Sstevel@tonic-gate puts(EXPAND("client username (%%u): %u")); 797c478bd9Sstevel@tonic-gate puts(EXPAND("client info (%%c): %c")); 807c478bd9Sstevel@tonic-gate puts(EXPAND("server address (%%A): %A")); 817c478bd9Sstevel@tonic-gate puts(EXPAND("server hostname (%%N): %N")); 827c478bd9Sstevel@tonic-gate puts(EXPAND("server process (%%d): %d")); 837c478bd9Sstevel@tonic-gate puts(EXPAND("server info (%%s): %s")); 847c478bd9Sstevel@tonic-gate 857c478bd9Sstevel@tonic-gate return (0); 867c478bd9Sstevel@tonic-gate } 87