/* $NetBSD: main.c,v 1.32 2018/12/14 23:40:17 christos Exp $ */ /* * Copyright (c) 1988, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1988, 1990, 1993\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 5/30/95"; #else __RCSID("$NetBSD: main.c,v 1.32 2018/12/14 23:40:17 christos Exp $"); #endif #endif /* not lint */ #include #include #include #include "ring.h" #include "externs.h" #include "defines.h" #ifdef AUTHENTICATION #include #endif #ifdef ENCRYPTION #include #endif /* These values need to be the same as defined in libtelnet/kerberos5.c */ /* Either define them in both places, or put in some common header file. */ #define OPTS_FORWARD_CREDS 0x00000002 #define OPTS_FORWARDABLE_CREDS 0x00000001 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) char *ipsec_policy_in = NULL; char *ipsec_policy_out = NULL; #endif int family = AF_UNSPEC; /* * Initialize variables. */ void tninit(void) { init_terminal(); init_network(); init_telnet(); init_sys(); } void usage(void) { fprintf(stderr, "usage: %s %s%s%s%s\n", prompt, #ifdef AUTHENTICATION "[-4] [-6] [-8] [-E] [-K] [-L] [-N] [-S tos] [-X atype] [-a] [-c]", "\n\t[-d] [-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ", #else "[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-a] [-c] [-d] [-e char]", "\n\t[-l user] [-n tracefile] ", #endif "[-r] ", #ifdef ENCRYPTION "[-x] " #endif #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) "\n\t[-P policy] [host-name [port]]" #else "\n\t[host-name [port]]" #endif ); exit(1); } /* * main. Parse arguments, invoke the protocol or command parser. */ int main(int argc, char *argv[]) { extern char *optarg; extern int optind; int ch; char *user; #ifdef FORWARD extern int forward_flags; #endif /* FORWARD */ tninit(); /* Clear out things */ TerminalSaveState(); if ((prompt = strrchr(argv[0], '/')) != NULL) ++prompt; else prompt = argv[0]; user = NULL; rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; autologin = -1; #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) #define IPSECOPT "P:" #else #define IPSECOPT #endif while ((ch = getopt(argc, argv, "468EKLNS:X:acde:fFk:l:n:rt:x" IPSECOPT)) != -1) { #undef IPSECOPT switch(ch) { case '4': family = AF_INET; break; case '6': family = AF_INET6; break; case '8': eight = 3; /* binary output and input */ break; case 'E': rlogin = escape = _POSIX_VDISABLE; break; case 'K': #ifdef AUTHENTICATION autologin = 0; #endif break; case 'L': eight |= 2; /* binary output only */ break; case 'N': doaddrlookup = 0; break; case 'S': { fprintf(stderr, "%s: Warning: -S ignored, no parsetos() support.\n", prompt); } break; case 'X': #ifdef AUTHENTICATION auth_disable_name(optarg); #endif break; case 'a': autologin = 1; break; case 'c': skiprc = 1; break; case 'd': telnet_debug = 1; break; case 'e': set_escape_char(optarg); break; case 'f': #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) if (forward_flags & OPTS_FORWARD_CREDS) { fprintf(stderr, "%s: Only one of -f and -F allowed.\n", prompt); usage(); } forward_flags |= OPTS_FORWARD_CREDS; #else fprintf(stderr, "%s: Warning: -f ignored, no Kerberos V5 support.\n", prompt); #endif break; case 'F': #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) if (forward_flags & OPTS_FORWARD_CREDS) { fprintf(stderr, "%s: Only one of -f and -F allowed.\n", prompt); usage(); } forward_flags |= OPTS_FORWARD_CREDS; forward_flags |= OPTS_FORWARDABLE_CREDS; #else fprintf(stderr, "%s: Warning: -F ignored, no Kerberos V5 support.\n", prompt); #endif break; case 'k': fprintf(stderr, "%s: Warning: -k ignored, no Kerberos V4 support.\n", prompt); break; case 'l': if(autologin == 0) { autologin = -1; } user = optarg; break; case 'n': SetNetTrace(optarg); break; case 'r': rlogin = '~'; break; case 't': fprintf(stderr, "%s: Warning: -t ignored, no TN3270 support.\n", prompt); break; case 'x': #ifdef ENCRYPTION encrypt_auto(1); decrypt_auto(1); #else /* ENCRYPTION */ fprintf(stderr, "%s: Warning: -x ignored, no ENCRYPT support.\n", prompt); #endif /* ENCRYPTION */ break; #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) case 'P': if (!strncmp("in", optarg, 2)) ipsec_policy_in = strdup(optarg); else if (!strncmp("out", optarg, 3)) ipsec_policy_out = strdup(optarg); else usage(); break; #endif case '?': default: usage(); /* NOTREACHED */ } } if (autologin == -1) { /* esc@magic.fi; force */ #if defined(AUTHENTICATION) autologin = 1; #endif #if defined(ENCRYPTION) encrypt_auto(1); decrypt_auto(1); #endif } if (autologin == -1) autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; argc -= optind; argv += optind; if (argc) { static char ml[] = "-l"; char *args[7]; char ** volatile argp; /* avoid longjmp clobbering */ argp = args; if (argc > 2) usage(); *argp++ = prompt; if (user) { *argp++ = ml; *argp++ = user; } *argp++ = argv[0]; /* host */ if (argc > 1) *argp++ = argv[1]; /* port */ *argp = 0; if (setjmp(toplevel) != 0) Exit(0); if (tn((int)(argp - args), args) == 1) return (0); else return (1); } (void)setjmp(toplevel); for (;;) { command(1, 0, 0); } }