/* * Copyright (c) 1988, 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * @(#)utilities.c 8.3 (Berkeley) 5/30/95 * $FreeBSD: src/crypto/telnet/telnet/utilities.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $ * $DragonFly: src/crypto/telnet/telnet/utilities.c,v 1.2 2003/06/17 04:24:37 dillon Exp $ */ #define TELOPTS #define TELCMDS #define SLC_NAMES #include #include #include #include #include #include #include #include "general.h" #include "fdset.h" #include "ring.h" #include "defines.h" #include "externs.h" #ifdef AUTHENTICATION #include #endif #ifdef ENCRYPTION #include #endif FILE *NetTrace = 0; /* Not in bss, since needs to stay */ int prettydump; /* * upcase() * * Upcase (in place) the argument. */ void upcase(char *argument) { int c; while ((c = *argument) != 0) { if (islower(c)) { *argument = toupper(c); } argument++; } } /* * SetSockOpt() * * Compensate for differences in 4.2 and 4.3 systems. */ int SetSockOpt(int fd, int level, int option, int yesno) { return setsockopt(fd, level, option, (char *)&yesno, sizeof yesno); } /* * The following are routines used to print out debugging information. */ unsigned char NetTraceFile[256] = "(standard output)"; void SetNetTrace(char *file) { if (NetTrace && NetTrace != stdout) fclose(NetTrace); if (file && (strcmp(file, "-") != 0)) { NetTrace = fopen(file, "w"); if (NetTrace) { strcpy((char *)NetTraceFile, file); return; } fprintf(stderr, "Cannot open %s.\n", file); } NetTrace = stdout; strcpy((char *)NetTraceFile, "(standard output)"); } void Dump(char direction, unsigned char *buffer, int length) { # define BYTES_PER_LINE 32 # define min(x,y) ((x= 3) { int j; i = pointer[length-2]; j = pointer[length-1]; if (i != IAC || j != SE) { fprintf(NetTrace, "(terminated by "); if (TELOPT_OK(i)) fprintf(NetTrace, "%s ", TELOPT(i)); else if (TELCMD_OK(i)) fprintf(NetTrace, "%s ", TELCMD(i)); else fprintf(NetTrace, "%d ", i); if (TELOPT_OK(j)) fprintf(NetTrace, "%s", TELOPT(j)); else if (TELCMD_OK(j)) fprintf(NetTrace, "%s", TELCMD(j)); else fprintf(NetTrace, "%d", j); fprintf(NetTrace, ", not IAC SE!) "); } } length -= 2; } if (length < 1) { fprintf(NetTrace, "(Empty suboption??\?)"); if (NetTrace == stdout) fflush(NetTrace); return; } switch (pointer[0]) { case TELOPT_TTYPE: fprintf(NetTrace, "TERMINAL-TYPE "); switch (pointer[1]) { case TELQUAL_IS: fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2); break; case TELQUAL_SEND: fprintf(NetTrace, "SEND"); break; default: fprintf(NetTrace, "- unknown qualifier %d (0x%x).", pointer[1], pointer[1]); } break; case TELOPT_TSPEED: fprintf(NetTrace, "TERMINAL-SPEED"); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } switch (pointer[1]) { case TELQUAL_IS: fprintf(NetTrace, " IS "); fprintf(NetTrace, "%.*s", length-2, (char *)pointer+2); break; default: if (pointer[1] == 1) fprintf(NetTrace, " SEND"); else fprintf(NetTrace, " %d (unknown)", pointer[1]); for (i = 2; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; } break; case TELOPT_LFLOW: fprintf(NetTrace, "TOGGLE-FLOW-CONTROL"); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } switch (pointer[1]) { case LFLOW_OFF: fprintf(NetTrace, " OFF"); break; case LFLOW_ON: fprintf(NetTrace, " ON"); break; case LFLOW_RESTART_ANY: fprintf(NetTrace, " RESTART-ANY"); break; case LFLOW_RESTART_XON: fprintf(NetTrace, " RESTART-XON"); break; default: fprintf(NetTrace, " %d (unknown)", pointer[1]); } for (i = 2; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; case TELOPT_NAWS: fprintf(NetTrace, "NAWS"); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } if (length == 2) { fprintf(NetTrace, " ?%d?", pointer[1]); break; } fprintf(NetTrace, " %d %d (%d)", pointer[1], pointer[2], (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); if (length == 4) { fprintf(NetTrace, " ?%d?", pointer[3]); break; } fprintf(NetTrace, " %d %d (%d)", pointer[3], pointer[4], (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); for (i = 5; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; #ifdef AUTHENTICATION case TELOPT_AUTHENTICATION: fprintf(NetTrace, "AUTHENTICATION"); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } switch (pointer[1]) { case TELQUAL_REPLY: case TELQUAL_IS: fprintf(NetTrace, " %s ", (pointer[1] == TELQUAL_IS) ? "IS" : "REPLY"); if (AUTHTYPE_NAME_OK(pointer[2])) fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[2])); else fprintf(NetTrace, "%d ", pointer[2]); if (length < 3) { fprintf(NetTrace, "(partial suboption??\?)"); break; } fprintf(NetTrace, "%s|%s", ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? "CLIENT" : "SERVER", ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? "MUTUAL" : "ONE-WAY"); auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); fprintf(NetTrace, "%s", buf); break; case TELQUAL_SEND: i = 2; fprintf(NetTrace, " SEND "); while (i < length) { if (AUTHTYPE_NAME_OK(pointer[i])) fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[i])); else fprintf(NetTrace, "%d ", pointer[i]); if (++i >= length) { fprintf(NetTrace, "(partial suboption??\?)"); break; } fprintf(NetTrace, "%s|%s ", ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? "CLIENT" : "SERVER", ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? "MUTUAL" : "ONE-WAY"); ++i; } break; case TELQUAL_NAME: i = 2; fprintf(NetTrace, " NAME \""); while (i < length) putc(pointer[i++], NetTrace); putc('"', NetTrace); break; default: for (i = 2; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; } break; #endif #ifdef ENCRYPTION case TELOPT_ENCRYPT: fprintf(NetTrace, "ENCRYPT"); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } switch (pointer[1]) { case ENCRYPT_START: fprintf(NetTrace, " START"); break; case ENCRYPT_END: fprintf(NetTrace, " END"); break; case ENCRYPT_REQSTART: fprintf(NetTrace, " REQUEST-START"); break; case ENCRYPT_REQEND: fprintf(NetTrace, " REQUEST-END"); break; case ENCRYPT_IS: case ENCRYPT_REPLY: fprintf(NetTrace, " %s ", (pointer[1] == ENCRYPT_IS) ? "IS" : "REPLY"); if (length < 3) { fprintf(NetTrace, " (partial suboption??\?)"); break; } if (ENCTYPE_NAME_OK(pointer[2])) fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[2])); else fprintf(NetTrace, " %d (unknown)", pointer[2]); encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); fprintf(NetTrace, "%s", buf); break; case ENCRYPT_SUPPORT: i = 2; fprintf(NetTrace, " SUPPORT "); while (i < length) { if (ENCTYPE_NAME_OK(pointer[i])) fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[i])); else fprintf(NetTrace, "%d ", pointer[i]); i++; } break; case ENCRYPT_ENC_KEYID: fprintf(NetTrace, " ENC_KEYID "); goto encommon; case ENCRYPT_DEC_KEYID: fprintf(NetTrace, " DEC_KEYID "); goto encommon; default: fprintf(NetTrace, " %d (unknown)", pointer[1]); encommon: for (i = 2; i < length; i++) fprintf(NetTrace, " %d", pointer[i]); break; } break; #endif /* ENCRYPTION */ case TELOPT_LINEMODE: fprintf(NetTrace, "LINEMODE "); if (length < 2) { fprintf(NetTrace, " (empty suboption??\?)"); break; } switch (pointer[1]) { case WILL: fprintf(NetTrace, "WILL "); goto common; case WONT: fprintf(NetTrace, "WONT "); goto common; case DO: fprintf(NetTrace, "DO "); goto common; case DONT: fprintf(NetTrace, "DONT "); common: if (length < 3) { fprintf(NetTrace, "(no option??\?)"); break; } switch (pointer[2]) { case LM_FORWARDMASK: fprintf(NetTrace, "Forward Mask"); for (i = 3; i < length; i++) fprintf(NetTrace, " %x", pointer[i]); break; default: fprintf(NetTrace, "%d (unknown)", pointer[2]); for (i = 3; i < length; i++) fprintf(NetTrace, " %d", pointer[i]); break; } break; case LM_SLC: fprintf(NetTrace, "SLC"); for (i = 2; i < length - 2; i += 3) { if (SLC_NAME_OK(pointer[i+SLC_FUNC])) fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC])); else fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]); switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { case SLC_NOSUPPORT: fprintf(NetTrace, " NOSUPPORT"); break; case SLC_CANTCHANGE: fprintf(NetTrace, " CANTCHANGE"); break; case SLC_VARIABLE: fprintf(NetTrace, " VARIABLE"); break; case SLC_DEFAULT: fprintf(NetTrace, " DEFAULT"); break; } fprintf(NetTrace, "%s%s%s", pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| SLC_FLUSHOUT| SLC_LEVELBITS)) fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]); fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]); if ((pointer[i+SLC_VALUE] == IAC) && (pointer[i+SLC_VALUE+1] == IAC)) i++; } for (; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; case LM_MODE: fprintf(NetTrace, "MODE "); if (length < 3) { fprintf(NetTrace, "(no mode??\?)"); break; } { char tbuf[64]; sprintf(tbuf, "%s%s%s%s%s", pointer[2]&MODE_EDIT ? "|EDIT" : "", pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", pointer[2]&MODE_ACK ? "|ACK" : ""); fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0"); } if (pointer[2]&~(MODE_MASK)) fprintf(NetTrace, " (0x%x)", pointer[2]); for (i = 3; i < length; i++) fprintf(NetTrace, " ?0x%x?", pointer[i]); break; default: fprintf(NetTrace, "%d (unknown)", pointer[1]); for (i = 2; i < length; i++) fprintf(NetTrace, " %d", pointer[i]); } break; case TELOPT_STATUS: { const char *cp; int j, k; fprintf(NetTrace, "STATUS"); switch (pointer[1]) { default: if (pointer[1] == TELQUAL_SEND) fprintf(NetTrace, " SEND"); else fprintf(NetTrace, " %d (unknown)", pointer[1]); for (i = 2; i < length; i++) fprintf(NetTrace, " ?%d?", pointer[i]); break; case TELQUAL_IS: if (--want_status_response < 0) want_status_response = 0; if (NetTrace == stdout) fprintf(NetTrace, " IS\r\n"); else fprintf(NetTrace, " IS\n"); for (i = 2; i < length; i++) { switch(pointer[i]) { case DO: cp = "DO"; goto common2; case DONT: cp = "DONT"; goto common2; case WILL: cp = "WILL"; goto common2; case WONT: cp = "WONT"; goto common2; common2: i++; if (TELOPT_OK((int)pointer[i])) fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i])); else fprintf(NetTrace, " %s %d", cp, pointer[i]); if (NetTrace == stdout) fprintf(NetTrace, "\r\n"); else fprintf(NetTrace, "\n"); break; case SB: fprintf(NetTrace, " SB "); i++; j = k = i; while (j < length) { if (pointer[j] == SE) { if (j+1 == length) break; if (pointer[j+1] == SE) j++; else break; } pointer[k++] = pointer[j++]; } printsub(0, &pointer[i], k - i); if (i < length) { fprintf(NetTrace, " SE"); i = j; } else i = j - 1; if (NetTrace == stdout) fprintf(NetTrace, "\r\n"); else fprintf(NetTrace, "\n"); break; default: fprintf(NetTrace, " %d", pointer[i]); break; } } break; } break; } case TELOPT_XDISPLOC: fprintf(NetTrace, "X-DISPLAY-LOCATION "); switch (pointer[1]) { case TELQUAL_IS: fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2); break; case TELQUAL_SEND: fprintf(NetTrace, "SEND"); break; default: fprintf(NetTrace, "- unknown qualifier %d (0x%x).", pointer[1], pointer[1]); } break; case TELOPT_NEW_ENVIRON: fprintf(NetTrace, "NEW-ENVIRON "); #ifdef OLD_ENVIRON goto env_common1; case TELOPT_OLD_ENVIRON: fprintf(NetTrace, "OLD-ENVIRON"); env_common1: #endif switch (pointer[1]) { case TELQUAL_IS: fprintf(NetTrace, "IS "); goto env_common; case TELQUAL_SEND: fprintf(NetTrace, "SEND "); goto env_common; case TELQUAL_INFO: fprintf(NetTrace, "INFO "); env_common: { int noquote = 2; #if defined(ENV_HACK) && defined(OLD_ENVIRON) extern int old_env_var, old_env_value; #endif for (i = 2; i < length; i++ ) { switch (pointer[i]) { case NEW_ENV_VALUE: #ifdef OLD_ENVIRON /* case NEW_ENV_OVAR: */ if (pointer[0] == TELOPT_OLD_ENVIRON) { # ifdef ENV_HACK if (old_env_var == OLD_ENV_VALUE) fprintf(NetTrace, "\" (VALUE) " + noquote); else # endif fprintf(NetTrace, "\" VAR " + noquote); } else #endif /* OLD_ENVIRON */ fprintf(NetTrace, "\" VALUE " + noquote); noquote = 2; break; case NEW_ENV_VAR: #ifdef OLD_ENVIRON /* case OLD_ENV_VALUE: */ if (pointer[0] == TELOPT_OLD_ENVIRON) { # ifdef ENV_HACK if (old_env_value == OLD_ENV_VAR) fprintf(NetTrace, "\" (VAR) " + noquote); else # endif fprintf(NetTrace, "\" VALUE " + noquote); } else #endif /* OLD_ENVIRON */ fprintf(NetTrace, "\" VAR " + noquote); noquote = 2; break; case ENV_ESC: fprintf(NetTrace, "\" ESC " + noquote); noquote = 2; break; case ENV_USERVAR: fprintf(NetTrace, "\" USERVAR " + noquote); noquote = 2; break; default: if (isprint(pointer[i]) && pointer[i] != '"') { if (noquote) { putc('"', NetTrace); noquote = 0; } putc(pointer[i], NetTrace); } else { fprintf(NetTrace, "\" %03o " + noquote, pointer[i]); noquote = 2; } break; } } if (!noquote) putc('"', NetTrace); break; } } break; default: if (TELOPT_OK(pointer[0])) fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0])); else fprintf(NetTrace, "%d (unknown)", pointer[0]); for (i = 1; i < length; i++) fprintf(NetTrace, " %d", pointer[i]); break; } if (direction) { if (NetTrace == stdout) fprintf(NetTrace, "\r\n"); else fprintf(NetTrace, "\n"); } if (NetTrace == stdout) fflush(NetTrace); } } /* EmptyTerminal - called to make sure that the terminal buffer is empty. * Note that we consider the buffer to run all the * way to the kernel (thus the select). */ static void EmptyTerminal(void) { fd_set o; FD_ZERO(&o); if (TTYBYTES() == 0) { FD_SET(tout, &o); (void) select(tout+1, NULL, &o, NULL, NULL); /* wait for TTLOWAT */ } else { while (TTYBYTES()) { (void) ttyflush(0); FD_SET(tout, &o); (void) select(tout+1, NULL, &o, NULL, NULL); /* wait for TTLOWAT */ } } } static void SetForExit(void) { setconnmode(0); do { (void)telrcv(); /* Process any incoming data */ EmptyTerminal(); } while (ring_full_count(&netiring)); /* While there is any */ setcommandmode(); fflush(stdout); fflush(stderr); setconnmode(0); EmptyTerminal(); /* Flush the path to the tty */ setcommandmode(); } void Exit(int returnCode) { SetForExit(); exit(returnCode); } void ExitString(const char *string, int returnCode) { SetForExit(); fwrite(string, 1, strlen(string), stderr); exit(returnCode); }