1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * This program can be called via a remote shell command to find out if the 3*0Sstevel@tonic-gate * hostname and address are properly recognized, if username lookup works, 4*0Sstevel@tonic-gate * and (SysV only) if the TLI on top of IP heuristics work. 5*0Sstevel@tonic-gate * 6*0Sstevel@tonic-gate * Example: "rsh host /some/where/try-from". 7*0Sstevel@tonic-gate * 8*0Sstevel@tonic-gate * Diagnostics are reported through syslog(3) and redirected to stderr. 9*0Sstevel@tonic-gate * 10*0Sstevel@tonic-gate * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands. 11*0Sstevel@tonic-gate */ 12*0Sstevel@tonic-gate 13*0Sstevel@tonic-gate #ifndef lint 14*0Sstevel@tonic-gate static char sccsid[] = "@(#) try-from.c 1.2 94/12/28 17:42:55"; 15*0Sstevel@tonic-gate #endif 16*0Sstevel@tonic-gate 17*0Sstevel@tonic-gate /* System libraries. */ 18*0Sstevel@tonic-gate 19*0Sstevel@tonic-gate #include <sys/types.h> 20*0Sstevel@tonic-gate #include <stdio.h> 21*0Sstevel@tonic-gate #include <syslog.h> 22*0Sstevel@tonic-gate #include <string.h> 23*0Sstevel@tonic-gate 24*0Sstevel@tonic-gate #ifdef TLI 25*0Sstevel@tonic-gate #include <sys/tiuser.h> 26*0Sstevel@tonic-gate #include <stropts.h> 27*0Sstevel@tonic-gate #endif 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #ifndef STDIN_FILENO 30*0Sstevel@tonic-gate #define STDIN_FILENO 0 31*0Sstevel@tonic-gate #endif 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate /* Local stuff. */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include "tcpd.h" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate int allow_severity = SEVERITY; /* run-time adjustable */ 38*0Sstevel@tonic-gate int deny_severity = LOG_WARNING; /* ditto */ 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate main(argc, argv) 41*0Sstevel@tonic-gate int argc; 42*0Sstevel@tonic-gate char **argv; 43*0Sstevel@tonic-gate { 44*0Sstevel@tonic-gate struct request_info request; 45*0Sstevel@tonic-gate char buf[BUFSIZ]; 46*0Sstevel@tonic-gate char *cp; 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /* 49*0Sstevel@tonic-gate * Simplify the process name, just like tcpd would. 50*0Sstevel@tonic-gate */ 51*0Sstevel@tonic-gate if ((cp = strrchr(argv[0], '/')) != 0) 52*0Sstevel@tonic-gate argv[0] = cp + 1; 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate /* 55*0Sstevel@tonic-gate * Turn on the "IP-underneath-TLI" detection heuristics. 56*0Sstevel@tonic-gate */ 57*0Sstevel@tonic-gate #ifdef TLI 58*0Sstevel@tonic-gate if (ioctl(0, I_FIND, "timod") == 0) 59*0Sstevel@tonic-gate ioctl(0, I_PUSH, "timod"); 60*0Sstevel@tonic-gate #endif /* TLI */ 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate /* 63*0Sstevel@tonic-gate * Look up the endpoint information. 64*0Sstevel@tonic-gate */ 65*0Sstevel@tonic-gate request_init(&request, RQ_DAEMON, argv[0], RQ_FILE, STDIN_FILENO, 0); 66*0Sstevel@tonic-gate (void) fromhost(&request); 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate /* 69*0Sstevel@tonic-gate * Show some results. Name and address information is looked up when we 70*0Sstevel@tonic-gate * ask for it. 71*0Sstevel@tonic-gate */ 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate #define EXPAND(str) percent_x(buf, sizeof(buf), str, &request) 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate puts(EXPAND("client address (%%a): %a")); 76*0Sstevel@tonic-gate puts(EXPAND("client hostname (%%n): %n")); 77*0Sstevel@tonic-gate puts(EXPAND("client username (%%u): %u")); 78*0Sstevel@tonic-gate puts(EXPAND("client info (%%c): %c")); 79*0Sstevel@tonic-gate puts(EXPAND("server address (%%A): %A")); 80*0Sstevel@tonic-gate puts(EXPAND("server hostname (%%N): %N")); 81*0Sstevel@tonic-gate puts(EXPAND("server process (%%d): %d")); 82*0Sstevel@tonic-gate puts(EXPAND("server info (%%s): %s")); 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate return (0); 85*0Sstevel@tonic-gate } 86