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-rw-r--r--remote_cmds/telnet.tproj/commands.c3063
1 files changed, 3063 insertions, 0 deletions
diff --git a/remote_cmds/telnet.tproj/commands.c b/remote_cmds/telnet.tproj/commands.c
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+++ b/remote_cmds/telnet.tproj/commands.c
@@ -0,0 +1,3063 @@
+/*
+ * 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. 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.
+ */
+
+#if 0
+#ifndef lint
+static const char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95";
+#endif
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/contrib/telnet/telnet/commands.c,v 1.35 2005/02/28 12:46:52 tobez Exp $");
+
+/* Use RFC 2292 constants in <netinet6/in6.h> */
+#define __APPLE_USE_RFC_2292
+
+#include <sys/param.h>
+#include <sys/un.h>
+#include <sys/file.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <arpa/telnet.h>
+#include <arpa/inet.h>
+
+#include "general.h"
+
+#include "ring.h"
+
+#include "externs.h"
+#include "defines.h"
+#include "types.h"
+#include "misc.h"
+
+#ifdef AUTHENTICATION
+#include <libtelnet/auth.h>
+#endif
+#ifdef ENCRYPTION
+#include <libtelnet/encrypt.h>
+#endif
+
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 256
+#endif
+
+typedef int (*intrtn_t)(int, char **);
+
+#ifdef AUTHENTICATION
+extern int auth_togdebug(int);
+#endif
+#ifdef ENCRYPTION
+extern int EncryptAutoEnc(int);
+extern int EncryptAutoDec(int);
+extern int EncryptDebug(int);
+extern int EncryptVerbose(int);
+#endif /* ENCRYPTION */
+#if defined(IPPROTO_IP) && defined(IP_TOS)
+int tos = -1;
+#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
+
+char *hostname;
+static char _hostname[MAXHOSTNAMELEN];
+
+static int help(int, char **);
+static int call(intrtn_t, ...);
+static void cmdrc(char *, char *);
+#ifdef INET6
+static int switch_af(struct addrinfo **);
+#endif
+static int togglehelp(void);
+static int send_tncmd(void (*)(int, int), const char *, char *);
+static int setmod(int);
+static int clearmode(int);
+static int modehelp(void);
+#ifndef __APPLE__
+static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *);
+#endif
+
+typedef struct {
+ const char *name; /* command name */
+ const char *help; /* help string (NULL for no help) */
+ int (*handler)(int, char **); /* routine which executes command */
+ int needconnect; /* Do we need to be connected to execute? */
+} Command;
+
+static char line[256];
+static char saveline[256];
+static int margc;
+static char *margv[20];
+
+#ifdef OPIE
+#include <sys/wait.h>
+#define PATH_OPIEKEY "/usr/bin/opiekey"
+static int
+opie_calc(int argc, char *argv[])
+{
+ int status;
+
+ if(argc != 3) {
+ printf("%s sequence challenge\n", argv[0]);
+ return (0);
+ }
+
+ switch(fork()) {
+ case 0:
+ execv(PATH_OPIEKEY, argv);
+ exit (1);
+ case -1:
+ perror("fork");
+ break;
+ default:
+ (void) wait(&status);
+ if (WIFEXITED(status))
+ return (WEXITSTATUS(status));
+ }
+ return (0);
+}
+#endif
+
+static void
+makeargv(void)
+{
+ char *cp, *cp2, c;
+ char **argp = margv;
+
+ margc = 0;
+ cp = line;
+ if (*cp == '!') { /* Special case shell escape */
+ strcpy(saveline, line); /* save for shell command */
+ *argp++ = strdup("!"); /* No room in string to get this */
+ margc++;
+ cp++;
+ }
+ while ((c = *cp)) {
+ int inquote = 0;
+ while (isspace(c))
+ c = *++cp;
+ if (c == '\0')
+ break;
+ *argp++ = cp;
+ margc += 1;
+ for (cp2 = cp; c != '\0'; c = *++cp) {
+ if (inquote) {
+ if (c == inquote) {
+ inquote = 0;
+ continue;
+ }
+ } else {
+ if (c == '\\') {
+ if ((c = *++cp) == '\0')
+ break;
+ } else if (c == '"') {
+ inquote = '"';
+ continue;
+ } else if (c == '\'') {
+ inquote = '\'';
+ continue;
+ } else if (isspace(c))
+ break;
+ }
+ *cp2++ = c;
+ }
+ *cp2 = '\0';
+ if (c == '\0')
+ break;
+ cp++;
+ }
+ *argp++ = 0;
+}
+
+/*
+ * Make a character string into a number.
+ *
+ * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
+ */
+
+static int
+special(char *s)
+{
+ char c;
+ char b;
+
+ switch (*s) {
+ case '^':
+ b = *++s;
+ if (b == '?') {
+ c = b | 0x40; /* DEL */
+ } else {
+ c = b & 0x1f;
+ }
+ break;
+ default:
+ c = *s;
+ break;
+ }
+ return c;
+}
+
+/*
+ * Construct a control character sequence
+ * for a special character.
+ */
+static const char *
+control(cc_t c)
+{
+ static char buf[5];
+ /*
+ * The only way I could get the Sun 3.5 compiler
+ * to shut up about
+ * if ((unsigned int)c >= 0x80)
+ * was to assign "c" to an unsigned int variable...
+ * Arggg....
+ */
+ unsigned int uic = (unsigned int)c;
+
+ if (uic == 0x7f)
+ return ("^?");
+ if (c == (cc_t)_POSIX_VDISABLE) {
+ return "off";
+ }
+ if (uic >= 0x80) {
+ buf[0] = '\\';
+ buf[1] = ((c>>6)&07) + '0';
+ buf[2] = ((c>>3)&07) + '0';
+ buf[3] = (c&07) + '0';
+ buf[4] = 0;
+ } else if (uic >= 0x20) {
+ buf[0] = c;
+ buf[1] = 0;
+ } else {
+ buf[0] = '^';
+ buf[1] = '@'+c;
+ buf[2] = 0;
+ }
+ return (buf);
+}
+
+/*
+ * The following are data structures and routines for
+ * the "send" command.
+ *
+ */
+
+struct sendlist {
+ const char *name; /* How user refers to it (case independent) */
+ const char *help; /* Help information (0 ==> no help) */
+ int needconnect; /* Need to be connected */
+ int narg; /* Number of arguments */
+ int (*handler)(char *, ...); /* Routine to perform (for special ops) */
+ int nbyte; /* Number of bytes to send this command */
+ int what; /* Character to be sent (<0 ==> special) */
+};
+
+
+static int
+ send_esc(void),
+ send_help(void),
+ send_docmd(char *),
+ send_dontcmd(char *),
+ send_willcmd(char *),
+ send_wontcmd(char *);
+
+static struct sendlist Sendlist[] = {
+ { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
+ { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
+ { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
+ { "break", NULL, 1, 0, NULL, 2, BREAK },
+ { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
+ { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
+ { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
+ { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
+ { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
+ { "intp", NULL, 1, 0, NULL, 2, IP },
+ { "interrupt", NULL, 1, 0, NULL, 2, IP },
+ { "intr", NULL, 1, 0, NULL, 2, IP },
+ { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
+ { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
+ { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
+ { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
+ { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
+ { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
+ { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
+ { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
+ { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
+ { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
+ { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
+ { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
+ { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
+ { NULL, NULL, 0, 0, NULL, 0, 0 }
+};
+
+#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
+ sizeof(struct sendlist)))
+
+static int
+sendcmd(int argc, char *argv[])
+{
+ int count; /* how many bytes we are going to need to send */
+ int i;
+ struct sendlist *s; /* pointer to current command */
+ int success = 0;
+ int needconnect = 0;
+
+ if (argc < 2) {
+ printf("need at least one argument for 'send' command\n");
+ printf("'send ?' for help\n");
+ return 0;
+ }
+ /*
+ * First, validate all the send arguments.
+ * In addition, we see how much space we are going to need, and
+ * whether or not we will be doing a "SYNCH" operation (which
+ * flushes the network queue).
+ */
+ count = 0;
+ for (i = 1; i < argc; i++) {
+ s = GETSEND(argv[i]);
+ if (s == 0) {
+ printf("Unknown send argument '%s'\n'send ?' for help.\n",
+ argv[i]);
+ return 0;
+ } else if (Ambiguous((void *)s)) {
+ printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
+ argv[i]);
+ return 0;
+ }
+ if (i + s->narg >= argc) {
+ fprintf(stderr,
+ "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
+ s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
+ return 0;
+ }
+ count += s->nbyte;
+ if ((void *)s->handler == (void *)send_help) {
+ send_help();
+ return 0;
+ }
+
+ i += s->narg;
+ needconnect += s->needconnect;
+ }
+ if (!connected && needconnect) {
+ printf("?Need to be connected first.\n");
+ printf("'send ?' for help\n");
+ return 0;
+ }
+ /* Now, do we have enough room? */
+ if (NETROOM() < count) {
+ printf("There is not enough room in the buffer TO the network\n");
+ printf("to process your request. Nothing will be done.\n");
+ printf("('send synch' will throw away most data in the network\n");
+ printf("buffer, if this might help.)\n");
+ return 0;
+ }
+ /* OK, they are all OK, now go through again and actually send */
+ count = 0;
+ for (i = 1; i < argc; i++) {
+ if ((s = GETSEND(argv[i])) == 0) {
+ fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
+ quit();
+ /*NOTREACHED*/
+ }
+ if (s->handler) {
+ count++;
+ success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
+ (s->narg > 1) ? argv[i+2] : 0);
+ i += s->narg;
+ } else {
+ NET2ADD(IAC, s->what);
+ printoption("SENT", IAC, s->what);
+ }
+ }
+ return (count == success);
+}
+
+static int
+send_esc(void)
+{
+ NETADD(escape);
+ return 1;
+}
+
+static int
+send_docmd(char *name)
+{
+ return(send_tncmd(send_do, "do", name));
+}
+
+static int
+send_dontcmd(name)
+ char *name;
+{
+ return(send_tncmd(send_dont, "dont", name));
+}
+
+static int
+send_willcmd(char *name)
+{
+ return(send_tncmd(send_will, "will", name));
+}
+
+static int
+send_wontcmd(char *name)
+{
+ return(send_tncmd(send_wont, "wont", name));
+}
+
+static int
+send_tncmd(void (*func)(int, int), const char *cmd, char *name)
+{
+ char **cpp;
+ extern char *telopts[];
+ int val = 0;
+
+ if (isprefix(name, "help") || isprefix(name, "?")) {
+ int col, len;
+
+ printf("usage: send %s <value|option>\n", cmd);
+ printf("\"value\" must be from 0 to 255\n");
+ printf("Valid options are:\n\t");
+
+ col = 8;
+ for (cpp = telopts; *cpp; cpp++) {
+ len = strlen(*cpp) + 3;
+ if (col + len > 65) {
+ printf("\n\t");
+ col = 8;
+ }
+ printf(" \"%s\"", *cpp);
+ col += len;
+ }
+ printf("\n");
+ return 0;
+ }
+ cpp = (char **)genget(name, telopts, sizeof(char *));
+ if (Ambiguous(cpp)) {
+ fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
+ name, cmd);
+ return 0;
+ }
+ if (cpp) {
+ val = cpp - telopts;
+ } else {
+ char *cp = name;
+
+ while (*cp >= '0' && *cp <= '9') {
+ val *= 10;
+ val += *cp - '0';
+ cp++;
+ }
+ if (*cp != 0) {
+ fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
+ name, cmd);
+ return 0;
+ } else if (val < 0 || val > 255) {
+ fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
+ name, cmd);
+ return 0;
+ }
+ }
+ if (!connected) {
+ printf("?Need to be connected first.\n");
+ return 0;
+ }
+ (*func)(val, 1);
+ return 1;
+}
+
+static int
+send_help(void)
+{
+ struct sendlist *s; /* pointer to current command */
+ for (s = Sendlist; s->name; s++) {
+ if (s->help)
+ printf("%-15s %s\n", s->name, s->help);
+ }
+ return(0);
+}
+
+/*
+ * The following are the routines and data structures referred
+ * to by the arguments to the "toggle" command.
+ */
+
+static int
+lclchars(void)
+{
+ donelclchars = 1;
+ return 1;
+}
+
+static int
+togdebug(void)
+{
+#ifndef NOT43
+ if (net > 0 &&
+ (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) {
+ perror("setsockopt (SO_DEBUG)");
+ }
+#else /* NOT43 */
+ if (telnet_debug) {
+ if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
+ perror("setsockopt (SO_DEBUG)");
+ } else
+ printf("Cannot turn off socket debugging\n");
+#endif /* NOT43 */
+ return 1;
+}
+
+
+static int
+togcrlf(void)
+{
+ if (crlf) {
+ printf("Will send carriage returns as telnet <CR><LF>.\n");
+ } else {
+ printf("Will send carriage returns as telnet <CR><NUL>.\n");
+ }
+ return 1;
+}
+
+int binmode;
+
+static int
+togbinary(int val)
+{
+ donebinarytoggle = 1;
+
+ if (val >= 0) {
+ binmode = val;
+ } else {
+ if (my_want_state_is_will(TELOPT_BINARY) &&
+ my_want_state_is_do(TELOPT_BINARY)) {
+ binmode = 1;
+ } else if (my_want_state_is_wont(TELOPT_BINARY) &&
+ my_want_state_is_dont(TELOPT_BINARY)) {
+ binmode = 0;
+ }
+ val = binmode ? 0 : 1;
+ }
+
+ if (val == 1) {
+ if (my_want_state_is_will(TELOPT_BINARY) &&
+ my_want_state_is_do(TELOPT_BINARY)) {
+ printf("Already operating in binary mode with remote host.\n");
+ } else {
+ printf("Negotiating binary mode with remote host.\n");
+ tel_enter_binary(3);
+ }
+ } else {
+ if (my_want_state_is_wont(TELOPT_BINARY) &&
+ my_want_state_is_dont(TELOPT_BINARY)) {
+ printf("Already in network ascii mode with remote host.\n");
+ } else {
+ printf("Negotiating network ascii mode with remote host.\n");
+ tel_leave_binary(3);
+ }
+ }
+ return 1;
+}
+
+static int
+togrbinary(int val)
+{
+ donebinarytoggle = 1;
+
+ if (val == -1)
+ val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
+
+ if (val == 1) {
+ if (my_want_state_is_do(TELOPT_BINARY)) {
+ printf("Already receiving in binary mode.\n");
+ } else {
+ printf("Negotiating binary mode on input.\n");
+ tel_enter_binary(1);
+ }
+ } else {
+ if (my_want_state_is_dont(TELOPT_BINARY)) {
+ printf("Already receiving in network ascii mode.\n");
+ } else {
+ printf("Negotiating network ascii mode on input.\n");
+ tel_leave_binary(1);
+ }
+ }
+ return 1;
+}
+
+static int
+togxbinary(int val)
+{
+ donebinarytoggle = 1;
+
+ if (val == -1)
+ val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
+
+ if (val == 1) {
+ if (my_want_state_is_will(TELOPT_BINARY)) {
+ printf("Already transmitting in binary mode.\n");
+ } else {
+ printf("Negotiating binary mode on output.\n");
+ tel_enter_binary(2);
+ }
+ } else {
+ if (my_want_state_is_wont(TELOPT_BINARY)) {
+ printf("Already transmitting in network ascii mode.\n");
+ } else {
+ printf("Negotiating network ascii mode on output.\n");
+ tel_leave_binary(2);
+ }
+ }
+ return 1;
+}
+
+struct togglelist {
+ const char *name; /* name of toggle */
+ const char *help; /* help message */
+ int (*handler)(int); /* routine to do actual setting */
+ int *variable;
+ const char *actionexplanation;
+};
+
+static struct togglelist Togglelist[] = {
+ { "autoflush",
+ "flushing of output when sending interrupt characters",
+ 0,
+ &autoflush,
+ "flush output when sending interrupt characters" },
+ { "autosynch",
+ "automatic sending of interrupt characters in urgent mode",
+ 0,
+ &autosynch,
+ "send interrupt characters in urgent mode" },
+#ifdef AUTHENTICATION
+ { "autologin",
+ "automatic sending of login and/or authentication info",
+ 0,
+ &autologin,
+ "send login name and/or authentication information" },
+ { "authdebug",
+ "Toggle authentication debugging",
+ auth_togdebug,
+ 0,
+ "print authentication debugging information" },
+#endif
+#ifdef ENCRYPTION
+ { "autoencrypt",
+ "automatic encryption of data stream",
+ EncryptAutoEnc,
+ 0,
+ "automatically encrypt output" },
+ { "autodecrypt",
+ "automatic decryption of data stream",
+ EncryptAutoDec,
+ 0,
+ "automatically decrypt input" },
+ { "verbose_encrypt",
+ "Toggle verbose encryption output",
+ EncryptVerbose,
+ 0,
+ "print verbose encryption output" },
+ { "encdebug",
+ "Toggle encryption debugging",
+ EncryptDebug,
+ 0,
+ "print encryption debugging information" },
+#endif /* ENCRYPTION */
+ { "skiprc",
+ "don't read ~/.telnetrc file",
+ 0,
+ &skiprc,
+ "skip reading of ~/.telnetrc file" },
+ { "binary",
+ "sending and receiving of binary data",
+ togbinary,
+ 0,
+ 0 },
+ { "inbinary",
+ "receiving of binary data",
+ togrbinary,
+ 0,
+ 0 },
+ { "outbinary",
+ "sending of binary data",
+ togxbinary,
+ 0,
+ 0 },
+ { "crlf",
+ "sending carriage returns as telnet <CR><LF>",
+ (int (*)(int))togcrlf,
+ &crlf,
+ 0 },
+ { "crmod",
+ "mapping of received carriage returns",
+ 0,
+ &crmod,
+ "map carriage return on output" },
+ { "localchars",
+ "local recognition of certain control characters",
+ (int (*)(int))lclchars,
+ &localchars,
+ "recognize certain control characters" },
+ { " ", "", NULL, NULL, NULL }, /* empty line */
+ { "debug",
+ "debugging",
+ (int (*)(int))togdebug,
+ &telnet_debug,
+ "turn on socket level debugging" },
+ { "netdata",
+ "printing of hexadecimal network data (debugging)",
+ 0,
+ &netdata,
+ "print hexadecimal representation of network traffic" },
+ { "prettydump",
+ "output of \"netdata\" to user readable format (debugging)",
+ 0,
+ &prettydump,
+ "print user readable output for \"netdata\"" },
+ { "options",
+ "viewing of options processing (debugging)",
+ 0,
+ &showoptions,
+ "show option processing" },
+ { "termdata",
+ "(debugging) toggle printing of hexadecimal terminal data",
+ 0,
+ &termdata,
+ "print hexadecimal representation of terminal traffic" },
+ { "?",
+ NULL,
+ (int (*)(int))togglehelp,
+ NULL,
+ NULL },
+ { NULL, NULL, NULL, NULL, NULL },
+ { "help",
+ NULL,
+ (int (*)(int))togglehelp,
+ NULL,
+ NULL },
+ { NULL, NULL, NULL, NULL, NULL }
+};
+
+static int
+togglehelp(void)
+{
+ struct togglelist *c;
+
+ for (c = Togglelist; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s toggle %s\n", c->name, c->help);
+ else
+ printf("\n");
+ }
+ }
+ printf("\n");
+ printf("%-15s %s\n", "?", "display help information");
+ return 0;
+}
+
+static void
+settogglehelp(int set)
+{
+ struct togglelist *c;
+
+ for (c = Togglelist; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
+ c->help);
+ else
+ printf("\n");
+ }
+ }
+}
+
+#define GETTOGGLE(name) (struct togglelist *) \
+ genget(name, (char **) Togglelist, sizeof(struct togglelist))
+
+static int
+toggle(int argc, char *argv[])
+{
+ int retval = 1;
+ char *name;
+ struct togglelist *c;
+
+ if (argc < 2) {
+ fprintf(stderr,
+ "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
+ return 0;
+ }
+ argc--;
+ argv++;
+ while (argc--) {
+ name = *argv++;
+ c = GETTOGGLE(name);
+ if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
+ name);
+ return 0;
+ } else if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
+ name);
+ return 0;
+ } else {
+ if (c->variable) {
+ *c->variable = !*c->variable; /* invert it */
+ if (c->actionexplanation) {
+ printf("%s %s.\n", *c->variable? "Will" : "Won't",
+ c->actionexplanation);
+ }
+ }
+ if (c->handler) {
+ retval &= (*c->handler)(-1);
+ }
+ }
+ }
+ return retval;
+}
+
+/*
+ * The following perform the "set" command.
+ */
+
+#ifdef USE_TERMIO
+struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
+#endif
+
+struct setlist {
+ const char *name; /* name */
+ const char *help; /* help information */
+ void (*handler)(char *);
+ cc_t *charp; /* where it is located at */
+};
+
+static struct setlist Setlist[] = {
+#ifdef KLUDGELINEMODE
+ { "echo", "character to toggle local echoing on/off", NULL, &echoc },
+#endif
+ { "escape", "character to escape back to telnet command mode", NULL, &escape },
+ { "rlogin", "rlogin escape character", 0, &rlogin },
+ { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
+ { " ", "", NULL, NULL },
+ { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
+ { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
+ { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
+ { "quit", "character to cause an Abort process", NULL, termQuitCharp },
+ { "eof", "character to cause an EOF ", NULL, termEofCharp },
+ { " ", "", NULL, NULL },
+ { " ", "The following are for local editing in linemode", NULL, NULL },
+ { "erase", "character to use to erase a character", NULL, termEraseCharp },
+ { "kill", "character to use to erase a line", NULL, termKillCharp },
+ { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
+ { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
+ { "reprint", "character to use for line reprint", NULL, termRprntCharp },
+ { "worderase", "character to use to erase a word", NULL, termWerasCharp },
+ { "start", "character to use for XON", NULL, termStartCharp },
+ { "stop", "character to use for XOFF", NULL, termStopCharp },
+ { "forw1", "alternate end of line character", NULL, termForw1Charp },
+ { "forw2", "alternate end of line character", NULL, termForw2Charp },
+ { "ayt", "alternate AYT character", NULL, termAytCharp },
+ { NULL, NULL, NULL, NULL }
+};
+
+static struct setlist *
+getset(char *name)
+{
+ return (struct setlist *)
+ genget(name, (char **) Setlist, sizeof(struct setlist));
+}
+
+void
+set_escape_char(char *s)
+{
+ if (rlogin != _POSIX_VDISABLE) {
+ rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
+ printf("Telnet rlogin escape character is '%s'.\n",
+ control(rlogin));
+ } else {
+ escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
+ printf("Telnet escape character is '%s'.\n", control(escape));
+ }
+}
+
+static int
+setcmd(int argc, char *argv[])
+{
+ int value;
+ struct setlist *ct;
+ struct togglelist *c;
+
+ if (argc < 2 || argc > 3) {
+ printf("Format is 'set Name Value'\n'set ?' for help.\n");
+ return 0;
+ }
+ if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
+ for (ct = Setlist; ct->name; ct++)
+ printf("%-15s %s\n", ct->name, ct->help);
+ printf("\n");
+ settogglehelp(1);
+ printf("%-15s %s\n", "?", "display help information");
+ return 0;
+ }
+
+ ct = getset(argv[1]);
+ if (ct == 0) {
+ c = GETTOGGLE(argv[1]);
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
+ argv[1]);
+ return 0;
+ } else if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (c->variable) {
+ if ((argc == 2) || (strcmp("on", argv[2]) == 0))
+ *c->variable = 1;
+ else if (strcmp("off", argv[2]) == 0)
+ *c->variable = 0;
+ else {
+ printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
+ return 0;
+ }
+ if (c->actionexplanation) {
+ printf("%s %s.\n", *c->variable? "Will" : "Won't",
+ c->actionexplanation);
+ }
+ }
+ if (c->handler)
+ (*c->handler)(1);
+ } else if (argc != 3) {
+ printf("Format is 'set Name Value'\n'set ?' for help.\n");
+ return 0;
+ } else if (Ambiguous((void *)ct)) {
+ fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
+ argv[1]);
+ return 0;
+ } else if (ct->handler) {
+ (*ct->handler)(argv[2]);
+ printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
+ } else {
+ if (strcmp("off", argv[2])) {
+ value = special(argv[2]);
+ } else {
+ value = _POSIX_VDISABLE;
+ }
+ *(ct->charp) = (cc_t)value;
+ printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
+ }
+ slc_check();
+ return 1;
+}
+
+static int
+unsetcmd(int argc, char *argv[])
+{
+ struct setlist *ct;
+ struct togglelist *c;
+ char *name;
+
+ if (argc < 2) {
+ fprintf(stderr,
+ "Need an argument to 'unset' command. 'unset ?' for help.\n");
+ return 0;
+ }
+ if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
+ for (ct = Setlist; ct->name; ct++)
+ printf("%-15s %s\n", ct->name, ct->help);
+ printf("\n");
+ settogglehelp(0);
+ printf("%-15s %s\n", "?", "display help information");
+ return 0;
+ }
+
+ argc--;
+ argv++;
+ while (argc--) {
+ name = *argv++;
+ ct = getset(name);
+ if (ct == 0) {
+ c = GETTOGGLE(name);
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
+ name);
+ return 0;
+ } else if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
+ name);
+ return 0;
+ }
+ if (c->variable) {
+ *c->variable = 0;
+ if (c->actionexplanation) {
+ printf("%s %s.\n", *c->variable? "Will" : "Won't",
+ c->actionexplanation);
+ }
+ }
+ if (c->handler)
+ (*c->handler)(0);
+ } else if (Ambiguous((void *)ct)) {
+ fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
+ name);
+ return 0;
+ } else if (ct->handler) {
+ (*ct->handler)(0);
+ printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
+ } else {
+ *(ct->charp) = _POSIX_VDISABLE;
+ printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
+ }
+ }
+ return 1;
+}
+
+/*
+ * The following are the data structures and routines for the
+ * 'mode' command.
+ */
+#ifdef KLUDGELINEMODE
+extern int kludgelinemode;
+
+static int
+dokludgemode(void)
+{
+ kludgelinemode = 1;
+ send_wont(TELOPT_LINEMODE, 1);
+ send_dont(TELOPT_SGA, 1);
+ send_dont(TELOPT_ECHO, 1);
+ return 1;
+}
+#endif
+
+static int
+dolinemode(void)
+{
+#ifdef KLUDGELINEMODE
+ if (kludgelinemode)
+ send_dont(TELOPT_SGA, 1);
+#endif
+ send_will(TELOPT_LINEMODE, 1);
+ send_dont(TELOPT_ECHO, 1);
+ return 1;
+}
+
+static int
+docharmode(void)
+{
+#ifdef KLUDGELINEMODE
+ if (kludgelinemode)
+ send_do(TELOPT_SGA, 1);
+ else
+#endif
+ send_wont(TELOPT_LINEMODE, 1);
+ send_do(TELOPT_ECHO, 1);
+ return 1;
+}
+
+static int
+dolmmode(int bit, int on)
+{
+ unsigned char c;
+ extern int linemode;
+
+ if (my_want_state_is_wont(TELOPT_LINEMODE)) {
+ printf("?Need to have LINEMODE option enabled first.\n");
+ printf("'mode ?' for help.\n");
+ return 0;
+ }
+
+ if (on)
+ c = (linemode | bit);
+ else
+ c = (linemode & ~bit);
+ lm_mode(&c, 1, 1);
+ return 1;
+}
+
+static int
+setmod(int bit)
+{
+ return dolmmode(bit, 1);
+}
+
+static int
+clearmode(int bit)
+{
+ return dolmmode(bit, 0);
+}
+
+struct modelist {
+ const char *name; /* command name */
+ const char *help; /* help string */
+ int (*handler)(int);/* routine which executes command */
+ int needconnect; /* Do we need to be connected to execute? */
+ int arg1;
+};
+
+static struct modelist ModeList[] = {
+ { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
+#ifdef KLUDGELINEMODE
+ { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
+#endif
+ { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
+#ifdef KLUDGELINEMODE
+ { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
+#endif
+ { "", "", NULL, 0, 0 },
+ { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
+ { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
+ { "+isig", 0, setmod, 1, MODE_TRAPSIG },
+ { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
+ { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
+ { "+edit", 0, setmod, 1, MODE_EDIT },
+ { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
+ { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
+ { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
+ { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
+ { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
+ { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
+ { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
+ { "help", 0, (int (*)(int))modehelp, 0, 0 },
+#ifdef KLUDGELINEMODE
+ { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
+#endif
+ { "", "", NULL, 0, 0 },
+ { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
+ { NULL, NULL, NULL, 0, 0 },
+};
+
+
+static int
+modehelp(void)
+{
+ struct modelist *mt;
+
+ printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
+ for (mt = ModeList; mt->name; mt++) {
+ if (mt->help) {
+ if (*mt->help)
+ printf("%-15s %s\n", mt->name, mt->help);
+ else
+ printf("\n");
+ }
+ }
+ return 0;
+}
+
+#define GETMODECMD(name) (struct modelist *) \
+ genget(name, (char **) ModeList, sizeof(struct modelist))
+
+static int
+modecmd(int argc, char *argv[])
+{
+ struct modelist *mt;
+
+ if (argc != 2) {
+ printf("'mode' command requires an argument\n");
+ printf("'mode ?' for help.\n");
+ } else if ((mt = GETMODECMD(argv[1])) == 0) {
+ fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
+ } else if (Ambiguous((void *)mt)) {
+ fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
+ } else if (mt->needconnect && !connected) {
+ printf("?Need to be connected first.\n");
+ printf("'mode ?' for help.\n");
+ } else if (mt->handler) {
+ return (*mt->handler)(mt->arg1);
+ }
+ return 0;
+}
+
+/*
+ * The following data structures and routines implement the
+ * "display" command.
+ */
+
+static int
+display(int argc, char *argv[])
+{
+ struct togglelist *tl;
+ struct setlist *sl;
+
+#define dotog(tl) if (tl->variable && tl->actionexplanation) { \
+ if (*tl->variable) { \
+ printf("will"); \
+ } else { \
+ printf("won't"); \
+ } \
+ printf(" %s.\n", tl->actionexplanation); \
+ }
+
+#define doset(sl) if (sl->name && *sl->name != ' ') { \
+ if (sl->handler == 0) \
+ printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
+ else \
+ printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
+ }
+
+ if (argc == 1) {
+ for (tl = Togglelist; tl->name; tl++) {
+ dotog(tl);
+ }
+ printf("\n");
+ for (sl = Setlist; sl->name; sl++) {
+ doset(sl);
+ }
+ } else {
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ sl = getset(argv[i]);
+ tl = GETTOGGLE(argv[i]);
+ if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
+ printf("?Ambiguous argument '%s'.\n", argv[i]);
+ return 0;
+ } else if (!sl && !tl) {
+ printf("?Unknown argument '%s'.\n", argv[i]);
+ return 0;
+ } else {
+ if (tl) {
+ dotog(tl);
+ }
+ if (sl) {
+ doset(sl);
+ }
+ }
+ }
+ }
+/*@*/optionstatus();
+#ifdef ENCRYPTION
+ EncryptStatus();
+#endif /* ENCRYPTION */
+ return 1;
+#undef doset
+#undef dotog
+}
+
+/*
+ * The following are the data structures, and many of the routines,
+ * relating to command processing.
+ */
+
+/*
+ * Set the escape character.
+ */
+static int
+setescape(int argc, char *argv[])
+{
+ char *arg;
+ char buf[50];
+
+ printf(
+ "Deprecated usage - please use 'set escape%s%s' in the future.\n",
+ (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
+ if (argc > 2)
+ arg = argv[1];
+ else {
+ printf("new escape character: ");
+ (void) fgets(buf, sizeof(buf), stdin);
+ arg = buf;
+ }
+ if (arg[0] != '\0')
+ escape = arg[0];
+ (void) fflush(stdout);
+ return 1;
+}
+
+static int
+togcrmod(void)
+{
+ crmod = !crmod;
+ printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
+ printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
+ (void) fflush(stdout);
+ return 1;
+}
+
+static int
+suspend(void)
+{
+#ifdef SIGTSTP
+ setcommandmode();
+ {
+ long oldrows, oldcols, newrows, newcols, err_;
+
+ err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
+ (void) kill(0, SIGTSTP);
+ /*
+ * If we didn't get the window size before the SUSPEND, but we
+ * can get them now (?), then send the NAWS to make sure that
+ * we are set up for the right window size.
+ */
+ if (TerminalWindowSize(&newrows, &newcols) && connected &&
+ (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
+ sendnaws();
+ }
+ }
+ /* reget parameters in case they were changed */
+ TerminalSaveState();
+ setconnmode(0);
+#else
+ printf("Suspend is not supported. Try the '!' command instead\n");
+#endif
+ return 1;
+}
+
+static int
+shell(int argc, char *argv[] __unused)
+{
+ long oldrows, oldcols, newrows, newcols, err_;
+
+ setcommandmode();
+
+ err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
+ switch(vfork()) {
+ case -1:
+ perror("Fork failed\n");
+ break;
+
+ case 0:
+ {
+ /*
+ * Fire up the shell in the child.
+ */
+ const char *shellp, *shellname;
+
+ shellp = getenv("SHELL");
+ if (shellp == NULL)
+ shellp = "/bin/sh";
+ if ((shellname = strrchr(shellp, '/')) == 0)
+ shellname = shellp;
+ else
+ shellname++;
+ if (argc > 1)
+ execl(shellp, shellname, "-c", &saveline[1], (char *)0);
+ else
+ execl(shellp, shellname, (char *)0);
+ perror("Execl");
+ _exit(1);
+ }
+ default:
+ (void)wait((int *)0); /* Wait for the shell to complete */
+
+ if (TerminalWindowSize(&newrows, &newcols) && connected &&
+ (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
+ sendnaws();
+ }
+ break;
+ }
+ return 1;
+}
+
+static int
+bye(int argc, char *argv[])
+{
+ extern int resettermname;
+
+ if (connected) {
+ (void) shutdown(net, 2);
+ printf("Connection closed.\n");
+ (void) NetClose(net);
+ connected = 0;
+ resettermname = 1;
+#ifdef AUTHENTICATION
+#ifdef ENCRYPTION
+ auth_encrypt_connect(connected);
+#endif
+#endif
+ /* reset options */
+ tninit();
+ }
+ if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
+ longjmp(toplevel, 1);
+ /* NOTREACHED */
+ }
+ return 1; /* Keep lint, etc., happy */
+}
+
+void
+quit(void)
+{
+ (void) call(bye, "bye", "fromquit", 0);
+ Exit(0);
+}
+
+static int
+logout(void)
+{
+ send_do(TELOPT_LOGOUT, 1);
+ (void) netflush();
+ return 1;
+}
+
+
+/*
+ * The SLC command.
+ */
+
+struct slclist {
+ const char *name;
+ const char *help;
+ void (*handler)(int);
+ int arg;
+};
+
+static void slc_help(void);
+
+struct slclist SlcList[] = {
+ { "export", "Use local special character definitions",
+ (void (*)(int))slc_mode_export, 0 },
+ { "import", "Use remote special character definitions",
+ slc_mode_import, 1 },
+ { "check", "Verify remote special character definitions",
+ slc_mode_import, 0 },
+ { "help", NULL, (void (*)(int))slc_help, 0 },
+ { "?", "Print help information", (void (*)(int))slc_help, 0 },
+ { NULL, NULL, NULL, 0 },
+};
+
+static void
+slc_help(void)
+{
+ struct slclist *c;
+
+ for (c = SlcList; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s %s\n", c->name, c->help);
+ else
+ printf("\n");
+ }
+ }
+}
+
+static struct slclist *
+getslc(char *name)
+{
+ return (struct slclist *)
+ genget(name, (char **) SlcList, sizeof(struct slclist));
+}
+
+static int
+slccmd(int argc, char *argv[])
+{
+ struct slclist *c;
+
+ if (argc != 2) {
+ fprintf(stderr,
+ "Need an argument to 'slc' command. 'slc ?' for help.\n");
+ return 0;
+ }
+ c = getslc(argv[1]);
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ (*c->handler)(c->arg);
+ slcstate();
+ return 1;
+}
+
+/*
+ * The ENVIRON command.
+ */
+
+struct envlist {
+ const char *name;
+ const char *help;
+ void (*handler)(unsigned char *, unsigned char *);
+ int narg;
+};
+
+extern struct env_lst *
+ env_define(const unsigned char *, unsigned char *);
+extern void
+ env_undefine(unsigned char *),
+ env_export(const unsigned char *),
+ env_unexport(const unsigned char *),
+ env_send(unsigned char *),
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+ env_varval(unsigned char *),
+#endif
+ env_list(void);
+static void
+ env_help(void);
+
+struct envlist EnvList[] = {
+ { "define", "Define an environment variable",
+ (void (*)(unsigned char *, unsigned char *))env_define, 2 },
+ { "undefine", "Undefine an environment variable",
+ (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
+ { "export", "Mark an environment variable for automatic export",
+ (void (*)(unsigned char *, unsigned char *))env_export, 1 },
+ { "unexport", "Don't mark an environment variable for automatic export",
+ (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
+ { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
+ { "list", "List the current environment variables",
+ (void (*)(unsigned char *, unsigned char *))env_list, 0 },
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+ { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
+ (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
+#endif
+ { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
+ { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
+ { NULL, NULL, NULL, 0 },
+};
+
+static void
+env_help(void)
+{
+ struct envlist *c;
+
+ for (c = EnvList; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s %s\n", c->name, c->help);
+ else
+ printf("\n");
+ }
+ }
+}
+
+static struct envlist *
+getenvcmd(char *name)
+{
+ return (struct envlist *)
+ genget(name, (char **) EnvList, sizeof(struct envlist));
+}
+
+static int
+env_cmd(int argc, char *argv[])
+{
+ struct envlist *c;
+
+ if (argc < 2) {
+ fprintf(stderr,
+ "Need an argument to 'environ' command. 'environ ?' for help.\n");
+ return 0;
+ }
+ c = getenvcmd(argv[1]);
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (c->narg + 2 != argc && strcasecmp(argv[1],"define")==0 && c->narg + 1 != argc) {
+ fprintf(stderr,
+ "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
+ c->narg < argc + 2 ? "only " : "",
+ c->narg, c->narg == 1 ? "" : "s", c->name);
+ return 0;
+ }
+ (*c->handler)((unsigned char *)argv[2], (unsigned char *)argv[3]);
+ return 1;
+}
+
+struct env_lst {
+ struct env_lst *next; /* pointer to next structure */
+ struct env_lst *prev; /* pointer to previous structure */
+ unsigned char *var; /* pointer to variable name */
+ unsigned char *value; /* pointer to variable value */
+ int export; /* 1 -> export with default list of variables */
+ int welldefined; /* A well defined variable */
+};
+
+struct env_lst envlisthead;
+
+static struct env_lst *
+env_find(const unsigned char *var)
+{
+ struct env_lst *ep;
+
+ for (ep = envlisthead.next; ep; ep = ep->next) {
+ if (strcmp((const char *)ep->var, (const char *)var) == 0)
+ return(ep);
+ }
+ return(NULL);
+}
+
+void
+env_init(void)
+{
+ char *ev;
+ struct env_lst *ep;
+ int i;
+
+ const char *safe_vars[]=
+ {"USER", "PRINTER", "DISPLAY", "TERM", "COLUMNS", "LINES"};
+
+ for(i=0;i<sizeof(safe_vars)/sizeof(const char *);i++) {
+ if((ev=getenv(safe_vars[i]))) {
+ ep=env_define((unsigned char *)safe_vars[i],(unsigned char *)ev);
+ ep->export=0;
+ }
+ }
+
+ /*
+ * Special case for DISPLAY variable. If it is ":0.0" or
+ * "unix:0.0", we have to get rid of "unix" and insert our
+ * hostname.
+ */
+ if ((ep = env_find((const unsigned char *)"DISPLAY"))
+ && ((*ep->value == ':')
+ || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
+ char hbuf[256+1];
+ char *cp, *cp2 = strchr((char *)ep->value, ':');
+
+ gethostname(hbuf, 256);
+ hbuf[256] = '\0';
+ cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
+ sprintf((char *)cp, "%s%s", hbuf, cp2);
+ free(ep->value);
+ ep->value = (unsigned char *)cp;
+ }
+ /*
+ * If USER is not defined, but LOGNAME is, then add
+ * USER with the value from LOGNAME. By default, we
+ * don't export the USER variable.
+ */
+ if ((env_find((const unsigned char *)"USER") == NULL) && (ep = env_find((const unsigned char *)"LOGNAME"))) {
+ env_define((const unsigned char *)"USER", ep->value);
+ env_unexport((const unsigned char *)"USER");
+ }
+ env_export((const unsigned char *)"DISPLAY");
+ env_export((const unsigned char *)"PRINTER");
+}
+
+struct env_lst *
+env_define(const unsigned char *var, unsigned char *value)
+{
+ char *ev;
+ struct env_lst *ep;
+
+ if ((ep = env_find(var))) {
+ if (ep->var)
+ free(ep->var);
+ if (ep->value)
+ free(ep->value);
+ } else {
+ ep = (struct env_lst *)malloc(sizeof(struct env_lst));
+ ep->next = envlisthead.next;
+ envlisthead.next = ep;
+ ep->prev = &envlisthead;
+ if (ep->next)
+ ep->next->prev = ep;
+ }
+
+ ep->welldefined = opt_welldefined((const char *)var);
+ ep->export = 1;
+ ep->var = (unsigned char *)strdup((const char *)var);
+
+ if(value)
+ ep->value = (unsigned char *)strdup((const char *)value);
+ else if((ev=getenv((const char *)var)))
+ ep->value = (unsigned char *)strdup(ev);
+ else ep->value = (unsigned char *)strdup("");
+ return(ep);
+}
+
+void
+env_undefine(unsigned char *var)
+{
+ struct env_lst *ep;
+
+ if ((ep = env_find(var))) {
+ ep->prev->next = ep->next;
+ if (ep->next)
+ ep->next->prev = ep->prev;
+ if (ep->var)
+ free(ep->var);
+ if (ep->value)
+ free(ep->value);
+ free(ep);
+ }
+}
+
+void
+env_export(const unsigned char *var)
+{
+ struct env_lst *ep;
+
+ if ((ep = env_find(var)))
+ ep->export = 1;
+}
+
+void
+env_unexport(const unsigned char *var)
+{
+ struct env_lst *ep;
+
+ if ((ep = env_find(var)))
+ ep->export = 0;
+}
+
+void
+env_send(unsigned char *var)
+{
+ struct env_lst *ep;
+
+ if (my_state_is_wont(TELOPT_NEW_ENVIRON)
+#ifdef OLD_ENVIRON
+ && my_state_is_wont(TELOPT_OLD_ENVIRON)
+#endif
+ ) {
+ fprintf(stderr,
+ "Cannot send '%s': Telnet ENVIRON option not enabled\n",
+ var);
+ return;
+ }
+ ep = env_find(var);
+ if (ep == 0) {
+ fprintf(stderr, "Cannot send '%s': variable not defined\n",
+ var);
+ return;
+ }
+ env_opt_start_info();
+ env_opt_add(ep->var);
+ env_opt_end(0);
+}
+
+void
+env_list(void)
+{
+ struct env_lst *ep;
+
+ for (ep = envlisthead.next; ep; ep = ep->next) {
+ printf("%c %-20s %s\n", ep->export ? '*' : ' ',
+ ep->var, ep->value);
+ }
+}
+
+unsigned char *
+env_default(int init, int welldefined)
+{
+ static struct env_lst *nep = NULL;
+
+ if (init) {
+ nep = &envlisthead;
+ return(NULL);
+ }
+ if (nep) {
+ while ((nep = nep->next)) {
+ if (nep->export && (nep->welldefined == welldefined))
+ return(nep->var);
+ }
+ }
+ return(NULL);
+}
+
+unsigned char *
+env_getvalue(const unsigned char *var)
+{
+ struct env_lst *ep;
+
+ if ((ep = env_find(var)))
+ return(ep->value);
+ return(NULL);
+}
+
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+void
+env_varval(unsigned char *what)
+{
+ extern int old_env_var, old_env_value, env_auto;
+ int len = strlen((char *)what);
+
+ if (len == 0)
+ goto unknown;
+
+ if (strncasecmp((char *)what, "status", len) == 0) {
+ if (env_auto)
+ printf("%s%s", "VAR and VALUE are/will be ",
+ "determined automatically\n");
+ if (old_env_var == OLD_ENV_VAR)
+ printf("VAR and VALUE set to correct definitions\n");
+ else
+ printf("VAR and VALUE definitions are reversed\n");
+ } else if (strncasecmp((char *)what, "auto", len) == 0) {
+ env_auto = 1;
+ old_env_var = OLD_ENV_VALUE;
+ old_env_value = OLD_ENV_VAR;
+ } else if (strncasecmp((char *)what, "right", len) == 0) {
+ env_auto = 0;
+ old_env_var = OLD_ENV_VAR;
+ old_env_value = OLD_ENV_VALUE;
+ } else if (strncasecmp((char *)what, "wrong", len) == 0) {
+ env_auto = 0;
+ old_env_var = OLD_ENV_VALUE;
+ old_env_value = OLD_ENV_VAR;
+ } else {
+unknown:
+ printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
+ }
+}
+#endif
+
+#ifdef AUTHENTICATION
+/*
+ * The AUTHENTICATE command.
+ */
+
+struct authlist {
+ const char *name;
+ const char *help;
+ int (*handler)(char *);
+ int narg;
+};
+
+extern int
+ auth_enable(char *),
+ auth_disable(char *),
+ auth_status(void);
+static int
+ auth_help(void);
+
+struct authlist AuthList[] = {
+ { "status", "Display current status of authentication information",
+ (int (*)(char *))auth_status, 0 },
+ { "disable", "Disable an authentication type ('auth disable ?' for more)",
+ auth_disable, 1 },
+ { "enable", "Enable an authentication type ('auth enable ?' for more)",
+ auth_enable, 1 },
+ { "help", NULL, (int (*)(char *))auth_help, 0 },
+ { "?", "Print help information", (int (*)(char *))auth_help, 0 },
+ { NULL, NULL, NULL, 0 },
+};
+
+static int
+auth_help(void)
+{
+ struct authlist *c;
+
+ for (c = AuthList; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s %s\n", c->name, c->help);
+ else
+ printf("\n");
+ }
+ }
+ return 0;
+}
+
+int
+auth_cmd(int argc, char *argv[])
+{
+ struct authlist *c;
+
+ if (argc < 2) {
+ fprintf(stderr,
+ "Need an argument to 'auth' command. 'auth ?' for help.\n");
+ return 0;
+ }
+
+ c = (struct authlist *)
+ genget(argv[1], (char **) AuthList, sizeof(struct authlist));
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (c->narg + 2 != argc) {
+ fprintf(stderr,
+ "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
+ c->narg < argc + 2 ? "only " : "",
+ c->narg, c->narg == 1 ? "" : "s", c->name);
+ return 0;
+ }
+ return((*c->handler)(argv[2]));
+}
+#endif
+
+#ifdef ENCRYPTION
+/*
+ * The ENCRYPT command.
+ */
+
+struct encryptlist {
+ const char *name;
+ const char *help;
+ int (*handler)(char *, char *);
+ int needconnect;
+ int minarg;
+ int maxarg;
+};
+
+extern int
+ EncryptEnable(char *, char *),
+ EncryptDisable(char *, char *),
+ EncryptType(char *, char *),
+ EncryptStart(char *),
+ EncryptStartInput(void),
+ EncryptStartOutput(void),
+ EncryptStop(char *),
+ EncryptStopInput(void),
+ EncryptStopOutput(void),
+ EncryptStatus(void);
+static int
+ EncryptHelp(void);
+
+struct encryptlist EncryptList[] = {
+ { "enable", "Enable encryption. ('encrypt enable ?' for more)",
+ EncryptEnable, 1, 1, 2 },
+ { "disable", "Disable encryption. ('encrypt enable ?' for more)",
+ EncryptDisable, 0, 1, 2 },
+ { "type", "Set encryption type. ('encrypt type ?' for more)",
+ EncryptType, 0, 1, 1 },
+ { "start", "Start encryption. ('encrypt start ?' for more)",
+ (int (*)(char *, char *))EncryptStart, 1, 0, 1 },
+ { "stop", "Stop encryption. ('encrypt stop ?' for more)",
+ (int (*)(char *, char *))EncryptStop, 1, 0, 1 },
+ { "input", "Start encrypting the input stream",
+ (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
+ { "-input", "Stop encrypting the input stream",
+ (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
+ { "output", "Start encrypting the output stream",
+ (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
+ { "-output", "Stop encrypting the output stream",
+ (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
+
+ { "status", "Display current status of authentication information",
+ (int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
+ { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
+ { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
+ { NULL, NULL, NULL, 0, 0, 0 },
+};
+
+static int
+EncryptHelp(void)
+{
+ struct encryptlist *c;
+
+ for (c = EncryptList; c->name; c++) {
+ if (c->help) {
+ if (*c->help)
+ printf("%-15s %s\n", c->name, c->help);
+ else
+ printf("\n");
+ }
+ }
+ return 0;
+}
+
+static int
+encrypt_cmd(int argc, char *argv[])
+{
+ struct encryptlist *c;
+
+ if (argc < 2) {
+ fprintf(stderr,
+ "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
+ return 0;
+ }
+
+ c = (struct encryptlist *)
+ genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
+ if (c == 0) {
+ fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ if (Ambiguous((void *)c)) {
+ fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
+ argv[1]);
+ return 0;
+ }
+ argc -= 2;
+ if (argc < c->minarg || argc > c->maxarg) {
+ if (c->minarg == c->maxarg) {
+ fprintf(stderr, "Need %s%d argument%s ",
+ c->minarg < argc ? "only " : "", c->minarg,
+ c->minarg == 1 ? "" : "s");
+ } else {
+ fprintf(stderr, "Need %s%d-%d arguments ",
+ c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
+ }
+ fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
+ c->name);
+ return 0;
+ }
+ if (c->needconnect && !connected) {
+ if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
+ printf("?Need to be connected first.\n");
+ return 0;
+ }
+ }
+ return ((*c->handler)(argc > 0 ? argv[2] : 0,
+ argc > 1 ? argv[3] : 0));
+}
+#endif /* ENCRYPTION */
+
+/*
+ * Print status about the connection.
+ */
+/*ARGSUSED*/
+static int
+status(int argc, char *argv[])
+{
+ if (connected) {
+ printf("Connected to %s.\n", hostname);
+ if ((argc < 2) || strcmp(argv[1], "notmuch")) {
+ int mode = getconnmode();
+
+ if (my_want_state_is_will(TELOPT_LINEMODE)) {
+ printf("Operating with LINEMODE option\n");
+ printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
+ printf("%s catching of signals\n",
+ (mode&MODE_TRAPSIG) ? "Local" : "No");
+ slcstate();
+#ifdef KLUDGELINEMODE
+ } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
+ printf("Operating in obsolete linemode\n");
+#endif
+ } else {
+ printf("Operating in single character mode\n");
+ if (localchars)
+ printf("Catching signals locally\n");
+ }
+ printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
+ if (my_want_state_is_will(TELOPT_LFLOW))
+ printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
+#ifdef ENCRYPTION
+ encrypt_display();
+#endif /* ENCRYPTION */
+ }
+ } else {
+ printf("No connection.\n");
+ }
+ printf("Escape character is '%s'.\n", control(escape));
+ (void) fflush(stdout);
+ return 1;
+}
+
+#ifdef SIGINFO
+/*
+ * Function that gets called when SIGINFO is received.
+ */
+void
+ayt_status(void)
+{
+ (void) call(status, "status", "notmuch", 0);
+}
+#endif
+
+static const char *
+sockaddr_ntop(struct sockaddr *sa)
+{
+ void *addr;
+ static char addrbuf[INET6_ADDRSTRLEN];
+
+ switch (sa->sa_family) {
+ case AF_INET:
+ addr = &((struct sockaddr_in *)sa)->sin_addr;
+ break;
+ case AF_UNIX:
+ addr = &((struct sockaddr_un *)sa)->sun_path;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
+ break;
+#endif
+ default:
+ return NULL;
+ }
+ inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
+ return addrbuf;
+}
+
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+static int
+setpolicy(int lnet, struct addrinfo *res, char *policy)
+{
+ char *buf;
+ int level;
+ int optname;
+
+ if (policy == NULL)
+ return 0;
+
+ buf = ipsec_set_policy(policy, strlen(policy));
+ if (buf == NULL) {
+ printf("%s\n", ipsec_strerror());
+ return -1;
+ }
+ level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
+ optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
+ if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
+ perror("setsockopt");
+ return -1;
+ }
+
+ free(buf);
+ return 0;
+}
+#endif
+
+#ifdef INET6
+/*
+ * When an Address Family related error happend, check if retry with
+ * another AF is possible or not.
+ * Return 1, if retry with another af is OK. Else, return 0.
+ */
+static int
+switch_af(struct addrinfo **aip)
+{
+ int nextaf;
+ struct addrinfo *ai;
+
+ ai = *aip;
+ nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
+ do
+ ai=ai->ai_next;
+ while (ai != NULL && ai->ai_family != nextaf);
+ *aip = ai;
+ if (*aip != NULL) {
+ return 1;
+ }
+ return 0;
+}
+#endif
+
+int
+tn(int argc, char *argv[])
+{
+ char *srp = 0;
+ int proto = 0, opt = 0;
+ int srlen = 0;
+#ifndef __APPLE__
+ int srcroute = 0, result;
+#else
+ int srcroute = 0;
+#endif
+ char *cmd, *hostp = 0, *portp = 0, *user = 0;
+ char *src_addr = NULL;
+ struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
+ int error = 0, af_error = 0;
+
+ if (connected) {
+ printf("?Already connected to %s\n", hostname);
+ setuid(getuid());
+ return 0;
+ }
+ if (argc < 2) {
+ (void) strcpy(line, "open ");
+ printf("(to) ");
+ (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
+ makeargv();
+ argc = margc;
+ argv = margv;
+ }
+ cmd = *argv;
+ --argc; ++argv;
+ while (argc) {
+ if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
+ goto usage;
+ if (strcmp(*argv, "-l") == 0) {
+ --argc; ++argv;
+ if (argc == 0)
+ goto usage;
+ user = *argv++;
+ --argc;
+ continue;
+ }
+ if (strcmp(*argv, "-a") == 0) {
+ --argc; ++argv;
+ autologin = 1;
+ continue;
+ }
+ if (strcmp(*argv, "-s") == 0) {
+ --argc; ++argv;
+ if (argc == 0)
+ goto usage;
+ src_addr = *argv++;
+ --argc;
+ continue;
+ }
+ if (hostp == 0) {
+ hostp = *argv++;
+ --argc;
+ continue;
+ }
+ if (portp == 0) {
+ portp = *argv++;
+ --argc;
+ continue;
+ }
+ usage:
+ printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
+ setuid(getuid());
+ return 0;
+ }
+ if (hostp == 0)
+ goto usage;
+
+ if (src_addr != NULL) {
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_NUMERICHOST;
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_STREAM;
+ error = getaddrinfo(src_addr, 0, &hints, &src_res);
+#ifdef EAI_NODATA
+ if ((error == EAI_NODATA) || (error == EAI_NONAME))
+#else
+ if (error == EAI_NONAME)
+#endif
+ {
+ hints.ai_flags = 0;
+ error = getaddrinfo(src_addr, 0, &hints, &src_res);
+ }
+ if (error != 0) {
+ fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
+ if (error == EAI_SYSTEM)
+ fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
+ setuid(getuid());
+ return 0;
+ }
+ src_res0 = src_res;
+ }
+ if (hostp[0] == '/') {
+ struct sockaddr_un su;
+
+ if (strlen(hostp) >= sizeof(su.sun_path)) {
+ fprintf(stderr, "hostname too long for unix domain socket: %s",
+ hostp);
+ goto fail;
+ }
+ memset(&su, 0, sizeof su);
+ su.sun_family = AF_UNIX;
+ strncpy(su.sun_path, hostp, sizeof su.sun_path);
+ printf("Trying %s...\n", hostp);
+ net = socket(PF_UNIX, SOCK_STREAM, 0);
+ if ( net < 0) {
+ perror("socket");
+ goto fail;
+ }
+ if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
+ perror(su.sun_path);
+ (void) NetClose(net);
+ goto fail;
+ }
+ goto af_unix;
+ } else if (hostp[0] == '@' || hostp[0] == '!') {
+ if (
+#ifdef INET6
+ family == AF_INET6 ||
+#endif
+ (hostname = strrchr(hostp, ':')) == NULL)
+ hostname = strrchr(hostp, '@');
+ if (hostname == NULL) {
+ hostname = hostp;
+ } else {
+ hostname++;
+ srcroute = 1;
+ }
+ } else
+ hostname = hostp;
+ if (!portp) {
+ telnetport = 1;
+ portp = strdup("telnet");
+ } else if (*portp == '-') {
+ portp++;
+ telnetport = 1;
+ } else if (*portp == '+') {
+ portp++;
+ telnetport = -1;
+ } else
+ telnetport = 0;
+
+#ifdef __APPLE__
+ {
+ /*
+ * 5760578: Attempt to convert service name to a
+ * numeric port before calling getaddrinfo().
+ */
+ struct servent *srv = getservbyname(portp, NULL);
+ if (srv != NULL) {
+ asprintf(&portp, "%d", ntohs(srv->s_port));
+ }
+ }
+#endif /* __APPLE__ */
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_NUMERICHOST;
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_STREAM;
+ error = getaddrinfo(hostname, portp, &hints, &res);
+ if (error) {
+ hints.ai_flags = AI_CANONNAME;
+ error = getaddrinfo(hostname, portp, &hints, &res);
+ }
+ if (error != 0) {
+ fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
+ if (error == EAI_SYSTEM)
+ fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
+ setuid(getuid());
+ goto fail;
+ }
+ if (hints.ai_flags == AI_NUMERICHOST) {
+ /* hostname has numeric */
+ int gni_err = 1;
+
+ if (doaddrlookup)
+ gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
+ _hostname, sizeof(_hostname) - 1, NULL, 0,
+ NI_NAMEREQD);
+ if (gni_err != 0)
+ (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
+ _hostname[sizeof(_hostname)-1] = '\0';
+ hostname = _hostname;
+ } else {
+ /* hostname has FQDN */
+ if (srcroute != 0)
+ (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
+ else if (res->ai_canonname != NULL)
+ strncpy(_hostname, res->ai_canonname, sizeof(_hostname) - 1);
+ else
+ (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
+ _hostname[sizeof(_hostname)-1] = '\0';
+ hostname = _hostname;
+ }
+ res0 = res;
+ #ifdef INET6
+ af_again:
+ #endif
+#ifndef __APPLE__
+ if (srcroute != 0) {
+ static char hostbuf[BUFSIZ];
+
+ if (af_error == 0) { /* save intermediate hostnames for retry */
+ strncpy(hostbuf, hostp, BUFSIZ - 1);
+ hostbuf[BUFSIZ - 1] = '\0';
+ } else
+ hostp = hostbuf;
+ srp = 0;
+ result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
+ if (result == 0) {
+#ifdef INET6
+ if (family == AF_UNSPEC && af_error == 0 &&
+ switch_af(&res) == 1) {
+ af_error = 1;
+ goto af_again;
+ }
+#endif
+ setuid(getuid());
+ goto fail;
+ } else if (result == -1) {
+ printf("Bad source route option: %s\n", hostp);
+ setuid(getuid());
+ goto fail;
+ }
+ }
+#endif
+ do {
+ printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
+ net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+ setuid(getuid());
+ if (net < 0) {
+#ifdef INET6
+ if (family == AF_UNSPEC && af_error == 0 &&
+ switch_af(&res) == 1) {
+ af_error = 1;
+ goto af_again;
+ }
+#endif
+ perror("telnet: socket");
+ goto fail;
+ }
+ if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
+ perror("setsockopt (source route)");
+#if defined(IPPROTO_IP) && defined(IP_TOS)
+ if (res->ai_family == PF_INET) {
+# if defined(HAS_GETTOS)
+ struct tosent *tp;
+ if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
+ tos = tp->t_tos;
+# endif
+ if (tos < 0)
+ tos = IPTOS_LOWDELAY;
+ if (tos
+ && (setsockopt(net, IPPROTO_IP, IP_TOS,
+ (char *)&tos, sizeof(int)) < 0)
+ && (errno != ENOPROTOOPT))
+ perror("telnet: setsockopt (IP_TOS) (ignored)");
+ }
+#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
+
+ if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
+ perror("setsockopt (SO_DEBUG)");
+ }
+
+ if (src_addr != NULL) {
+ for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next)
+ if (src_res->ai_family == res->ai_family)
+ break;
+ if (src_res == NULL)
+ src_res = src_res0;
+ if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
+#ifdef INET6
+ if (family == AF_UNSPEC && af_error == 0 &&
+ switch_af(&res) == 1) {
+ af_error = 1;
+ (void) NetClose(net);
+ goto af_again;
+ }
+#endif
+ perror("bind");
+ (void) NetClose(net);
+ goto fail;
+ }
+ }
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+ if (setpolicy(net, res, ipsec_policy_in) < 0) {
+ (void) NetClose(net);
+ goto fail;
+ }
+ if (setpolicy(net, res, ipsec_policy_out) < 0) {
+ (void) NetClose(net);
+ goto fail;
+ }
+#endif
+
+ if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
+ struct addrinfo *next;
+
+ next = res->ai_next;
+ /* If already an af failed, only try same af. */
+ if (af_error != 0)
+ while (next != NULL && next->ai_family != res->ai_family)
+ next = next->ai_next;
+ warn("connect to address %s", sockaddr_ntop(res->ai_addr));
+ if (next != NULL) {
+ res = next;
+ (void) NetClose(net);
+ continue;
+ }
+ warnx("Unable to connect to remote host");
+ (void) NetClose(net);
+ goto fail;
+ }
+ connected++;
+#ifdef AUTHENTICATION
+#ifdef ENCRYPTION
+ auth_encrypt_connect(connected);
+#endif
+#endif
+ } while (connected == 0);
+ freeaddrinfo(res0);
+ if (src_res0 != NULL)
+ freeaddrinfo(src_res0);
+ cmdrc(hostp, hostname);
+ af_unix:
+ connected = 1;
+ if (autologin && user == NULL) {
+ struct passwd *pw;
+
+ user = getenv("USER");
+ if (user == NULL ||
+ ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
+ if ((pw = getpwuid(getuid())))
+ user = pw->pw_name;
+ else
+ user = NULL;
+ }
+ }
+ if (user) {
+ env_define((unsigned char*)"USER", (unsigned char*)user);
+ env_export((unsigned char*)"USER");
+ }
+ (void) call(status, "status", "notmuch", 0);
+ if (setjmp(peerdied) == 0)
+ telnet(user);
+ (void) NetClose(net);
+ ExitString("Connection closed by foreign host.\n",1);
+ /*NOTREACHED*/
+ fail:
+ if (res0 != NULL)
+ freeaddrinfo(res0);
+ if (src_res0 != NULL)
+ freeaddrinfo(src_res0);
+ return 0;
+}
+
+#define HELPINDENT (sizeof ("connect"))
+
+static char
+ openhelp[] = "connect to a site",
+ closehelp[] = "close current connection",
+ logouthelp[] = "forcibly logout remote user and close the connection",
+ quithelp[] = "exit telnet",
+ statushelp[] = "print status information",
+ helphelp[] = "print help information",
+ sendhelp[] = "transmit special characters ('send ?' for more)",
+ sethelp[] = "set operating parameters ('set ?' for more)",
+ unsethelp[] = "unset operating parameters ('unset ?' for more)",
+ togglestring[] ="toggle operating parameters ('toggle ?' for more)",
+ slchelp[] = "change state of special charaters ('slc ?' for more)",
+ displayhelp[] = "display operating parameters",
+#ifdef AUTHENTICATION
+ authhelp[] = "turn on (off) authentication ('auth ?' for more)",
+#endif
+#ifdef ENCRYPTION
+ encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
+#endif /* ENCRYPTION */
+ zhelp[] = "suspend telnet",
+#ifdef OPIE
+ opiehelp[] = "compute response to OPIE challenge",
+#endif
+ shellhelp[] = "invoke a subshell",
+ envhelp[] = "change environment variables ('environ ?' for more)",
+ modestring[] = "try to enter line or character mode ('mode ?' for more)";
+
+static Command cmdtab[] = {
+ { "close", closehelp, bye, 1 },
+ { "logout", logouthelp, (int (*)(int, char **))logout, 1 },
+ { "display", displayhelp, display, 0 },
+ { "mode", modestring, modecmd, 0 },
+ { "telnet", openhelp, tn, 0 },
+ { "open", openhelp, tn, 0 },
+ { "quit", quithelp, (int (*)(int, char **))quit, 0 },
+ { "send", sendhelp, sendcmd, 0 },
+ { "set", sethelp, setcmd, 0 },
+ { "unset", unsethelp, unsetcmd, 0 },
+ { "status", statushelp, status, 0 },
+ { "toggle", togglestring, toggle, 0 },
+ { "slc", slchelp, slccmd, 0 },
+#ifdef AUTHENTICATION
+ { "auth", authhelp, auth_cmd, 0 },
+#endif
+#ifdef ENCRYPTION
+ { "encrypt", encrypthelp, encrypt_cmd, 0 },
+#endif /* ENCRYPTION */
+ { "z", zhelp, (int (*)(int, char **))suspend, 0 },
+ { "!", shellhelp, shell, 1 },
+ { "environ", envhelp, env_cmd, 0 },
+ { "?", helphelp, help, 0 },
+#ifdef OPIE
+ { "opie", opiehelp, opie_calc, 0 },
+#endif
+ { NULL, NULL, NULL, 0 }
+};
+
+static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
+static char escapehelp[] = "deprecated command -- use 'set escape' instead";
+
+static Command cmdtab2[] = {
+ { "help", 0, help, 0 },
+ { "escape", escapehelp, setescape, 0 },
+ { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
+ { NULL, NULL, NULL, 0 }
+};
+
+
+/*
+ * Call routine with argc, argv set from args (terminated by 0).
+ */
+
+static int
+call(intrtn_t routine, ...)
+{
+ va_list ap;
+ char *args[100];
+ int argno = 0;
+
+ va_start(ap, routine);
+ while ((args[argno++] = va_arg(ap, char *)) != 0);
+ va_end(ap);
+ return (*routine)(argno-1, args);
+}
+
+
+static Command *
+getcmd(char *name)
+{
+ Command *cm;
+
+ if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
+ return cm;
+ return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
+}
+
+void
+command(int top, const char *tbuf, int cnt)
+{
+ Command *c;
+
+ setcommandmode();
+ if (!top) {
+ putchar('\n');
+ } else {
+ (void) signal(SIGINT, SIG_DFL);
+ (void) signal(SIGQUIT, SIG_DFL);
+ }
+ for (;;) {
+ if (rlogin == _POSIX_VDISABLE)
+ printf("%s> ", prompt);
+ if (tbuf) {
+ char *cp;
+ cp = line;
+ while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
+ cnt--;
+ tbuf = 0;
+ if (cp == line || *--cp != '\n' || cp == line)
+ goto getline;
+ *cp = '\0';
+ if (rlogin == _POSIX_VDISABLE)
+ printf("%s\n", line);
+ } else {
+ getline:
+ if (rlogin != _POSIX_VDISABLE)
+ printf("%s> ", prompt);
+ if (fgets(line, sizeof(line), stdin) == NULL) {
+ if (feof(stdin) || ferror(stdin)) {
+ (void) quit();
+ /*NOTREACHED*/
+ }
+ break;
+ }
+ }
+ if (line[0] == 0)
+ break;
+ makeargv();
+ if (margv[0] == 0) {
+ break;
+ }
+ c = getcmd(margv[0]);
+ if (Ambiguous((void *)c)) {
+ printf("?Ambiguous command\n");
+ continue;
+ }
+ if (c == 0) {
+ printf("?Invalid command\n");
+ continue;
+ }
+ if (c->needconnect && !connected) {
+ printf("?Need to be connected first.\n");
+ continue;
+ }
+ if ((*c->handler)(margc, margv)) {
+ break;
+ }
+ }
+ if (!top) {
+ if (!connected) {
+ longjmp(toplevel, 1);
+ /*NOTREACHED*/
+ }
+ setconnmode(0);
+ }
+}
+
+/*
+ * Help command.
+ */
+static int
+help(int argc, char *argv[])
+{
+ Command *c;
+
+ if (argc == 1) {
+ printf("Commands may be abbreviated. Commands are:\n\n");
+ for (c = cmdtab; c->name; c++)
+ if (c->help) {
+ printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
+ c->help);
+ }
+ return 0;
+ }
+ else while (--argc > 0) {
+ char *arg;
+ arg = *++argv;
+ c = getcmd(arg);
+ if (Ambiguous((void *)c))
+ printf("?Ambiguous help command %s\n", arg);
+ else if (c == (Command *)0)
+ printf("?Invalid help command %s\n", arg);
+ else
+ printf("%s\n", c->help);
+ }
+ return 0;
+}
+
+static char *rcname = 0;
+static char rcbuf[128];
+
+void
+cmdrc(char *m1, char *m2)
+{
+ Command *c;
+ FILE *rcfile;
+ int gotmachine = 0;
+ int l1 = strlen(m1);
+ int l2 = strlen(m2);
+ char m1save[MAXHOSTNAMELEN];
+
+ if (skiprc)
+ return;
+
+ strlcpy(m1save, m1, sizeof(m1save));
+ m1 = m1save;
+
+ if (rcname == 0) {
+ rcname = getenv("HOME");
+ if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
+ strcpy(rcbuf, rcname);
+ else
+ rcbuf[0] = '\0';
+ strcat(rcbuf, "/.telnetrc");
+ rcname = rcbuf;
+ }
+
+ if ((rcfile = fopen(rcname, "r")) == 0) {
+ return;
+ }
+
+ for (;;) {
+ if (fgets(line, sizeof(line), rcfile) == NULL)
+ break;
+ if (line[0] == 0)
+ break;
+ if (line[0] == '#')
+ continue;
+ if (gotmachine) {
+ if (!isspace(line[0]))
+ gotmachine = 0;
+ }
+ if (gotmachine == 0) {
+ if (isspace(line[0]))
+ continue;
+ if (strncasecmp(line, m1, l1) == 0)
+ strncpy(line, &line[l1], sizeof(line) - l1);
+ else if (strncasecmp(line, m2, l2) == 0)
+ strncpy(line, &line[l2], sizeof(line) - l2);
+ else if (strncasecmp(line, "DEFAULT", 7) == 0)
+ strncpy(line, &line[7], sizeof(line) - 7);
+ else
+ continue;
+ if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
+ continue;
+ gotmachine = 1;
+ }
+ makeargv();
+ if (margv[0] == 0)
+ continue;
+ c = getcmd(margv[0]);
+ if (Ambiguous((void *)c)) {
+ printf("?Ambiguous command: %s\n", margv[0]);
+ continue;
+ }
+ if (c == 0) {
+ printf("?Invalid command: %s\n", margv[0]);
+ continue;
+ }
+ /*
+ * This should never happen...
+ */
+ if (c->needconnect && !connected) {
+ printf("?Need to be connected first for %s.\n", margv[0]);
+ continue;
+ }
+ (*c->handler)(margc, margv);
+ }
+ fclose(rcfile);
+}
+
+#ifndef __APPLE__
+/*
+ * Source route is handed in as
+ * [!]@hop1@hop2...[@|:]dst
+ * If the leading ! is present, it is a
+ * strict source route, otherwise it is
+ * assmed to be a loose source route.
+ *
+ * We fill in the source route option as
+ * hop1,hop2,hop3...dest
+ * and return a pointer to hop1, which will
+ * be the address to connect() to.
+ *
+ * Arguments:
+ *
+ * res: ponter to addrinfo structure which contains sockaddr to
+ * the host to connect to.
+ *
+ * arg: pointer to route list to decipher
+ *
+ * cpp: If *cpp is not equal to NULL, this is a
+ * pointer to a pointer to a character array
+ * that should be filled in with the option.
+ *
+ * lenp: pointer to an integer that contains the
+ * length of *cpp if *cpp != NULL.
+ *
+ * protop: pointer to an integer that should be filled in with
+ * appropriate protocol for setsockopt, as socket
+ * protocol family.
+ *
+ * optp: pointer to an integer that should be filled in with
+ * appropriate option for setsockopt, as socket protocol
+ * family.
+ *
+ * Return values:
+ *
+ * If the return value is 1, then all operations are
+ * successful. If the
+ * return value is -1, there was a syntax error in the
+ * option, either unknown characters, or too many hosts.
+ * If the return value is 0, one of the hostnames in the
+ * path is unknown, and *cpp is set to point to the bad
+ * hostname.
+ *
+ * *cpp: If *cpp was equal to NULL, it will be filled
+ * in with a pointer to our static area that has
+ * the option filled in. This will be 32bit aligned.
+ *
+ * *lenp: This will be filled in with how long the option
+ * pointed to by *cpp is.
+ *
+ * *protop: This will be filled in with appropriate protocol for
+ * setsockopt, as socket protocol family.
+ *
+ * *optp: This will be filled in with appropriate option for
+ * setsockopt, as socket protocol family.
+ */
+static int
+sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp)
+{
+ static char buf[1024 + ALIGNBYTES]; /*XXX*/
+ char *cp, *cp2, *lsrp, *ep;
+ struct sockaddr_in *_sin;
+#ifdef INET6
+ struct sockaddr_in6 *sin6;
+ struct cmsghdr *cmsg = NULL;
+#endif
+ struct addrinfo hints, *res;
+ int error;
+ char c;
+
+ /*
+ * Verify the arguments, and make sure we have
+ * at least 7 bytes for the option.
+ */
+ if (cpp == NULL || lenp == NULL)
+ return -1;
+ if (*cpp != NULL) {
+ switch (ai->ai_family) {
+ case AF_INET:
+ if (*lenp < 7)
+ return -1;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
+ sizeof(struct in6_addr)))
+ return -1;
+ break;
+#endif
+ }
+ }
+ /*
+ * Decide whether we have a buffer passed to us,
+ * or if we need to use our own static buffer.
+ */
+ if (*cpp) {
+ lsrp = *cpp;
+ ep = lsrp + *lenp;
+ } else {
+ *cpp = lsrp = (char *)ALIGN(buf);
+ ep = lsrp + 1024;
+ }
+
+ cp = arg;
+
+#ifdef INET6
+ if (ai->ai_family == AF_INET6) {
+ cmsg = inet6_rthdr_init(*cpp, IPV6_RTHDR_TYPE_0);
+ if (*cp != '@')
+ return -1;
+ *protop = IPPROTO_IPV6;
+ *optp = IPV6_PKTOPTIONS;
+ } else
+#endif
+ {
+ /*
+ * Next, decide whether we have a loose source
+ * route or a strict source route, and fill in
+ * the begining of the option.
+ */
+ if (*cp == '!') {
+ cp++;
+ *lsrp++ = IPOPT_SSRR;
+ } else
+ *lsrp++ = IPOPT_LSRR;
+
+ if (*cp != '@')
+ return -1;
+
+ lsrp++; /* skip over length, we'll fill it in later */
+ *lsrp++ = 4;
+ *protop = IPPROTO_IP;
+ *optp = IP_OPTIONS;
+ }
+
+ cp++;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = ai->ai_family;
+ hints.ai_socktype = SOCK_STREAM;
+ for (c = 0;;) {
+ if (
+#ifdef INET6
+ ai->ai_family != AF_INET6 &&
+#endif
+ c == ':')
+ cp2 = 0;
+ else for (cp2 = cp; (c = *cp2); cp2++) {
+ if (c == ',') {
+ *cp2++ = '\0';
+ if (*cp2 == '@')
+ cp2++;
+ } else if (c == '@') {
+ *cp2++ = '\0';
+ } else if (
+#ifdef INET6
+ ai->ai_family != AF_INET6 &&
+#endif
+ c == ':') {
+ *cp2++ = '\0';
+ } else
+ continue;
+ break;
+ }
+ if (!c)
+ cp2 = 0;
+
+ hints.ai_flags = AI_NUMERICHOST;
+ error = getaddrinfo(cp, NULL, &hints, &res);
+#ifdef EAI_NODATA
+ if ((error == EAI_NODATA) || (error == EAI_NONAME))
+#else
+ if (error == EAI_NONAME)
+#endif
+ {
+ hints.ai_flags = 0;
+ error = getaddrinfo(cp, NULL, &hints, &res);
+ }
+ if (error != 0) {
+ fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
+ if (error == EAI_SYSTEM)
+ fprintf(stderr, "%s: %s\n", cp,
+ strerror(errno));
+ *cpp = cp;
+ return(0);
+ }
+#ifdef INET6
+ if (res->ai_family == AF_INET6) {
+ sin6 = (struct sockaddr_in6 *)res->ai_addr;
+ inet6_rthdr_add(cmsg, &sin6->sin6_addr,
+ IPV6_RTHDR_LOOSE);
+ } else
+#endif
+ {
+ _sin = (struct sockaddr_in *)res->ai_addr;
+ memcpy(lsrp, (char *)&_sin->sin_addr, 4);
+ lsrp += 4;
+ }
+ if (cp2)
+ cp = cp2;
+ else
+ break;
+ /*
+ * Check to make sure there is space for next address
+ */
+#ifdef INET6
+ if (res->ai_family == AF_INET6) {
+ if (((char *)CMSG_DATA(cmsg) +
+ sizeof(struct ip6_rthdr) +
+ ((inet6_rthdr_segments(cmsg) + 1) *
+ sizeof(struct in6_addr))) > ep)
+ return -1;
+ } else
+#endif
+ if (lsrp + 4 > ep)
+ return -1;
+ freeaddrinfo(res);
+ }
+#ifdef INET6
+ if (res->ai_family == AF_INET6) {
+ inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
+ *lenp = cmsg->cmsg_len;
+ } else
+#endif
+ {
+ if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
+ *cpp = 0;
+ *lenp = 0;
+ return -1;
+ }
+ *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
+ *lenp = lsrp - *cpp;
+ }
+ freeaddrinfo(res);
+ return 1;
+}
+#endif
generated by cgit v1.2.3-56-ge451 (git 2.39.0) at 2024-05-18 22:10:09 +0000