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| Current File : //usr/src/crypto/heimdal/appl/telnet/telnet/commands.c |
/*
* 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.
*/
#include "telnet_locl.h"
RCSID("$Id: commands.c 16224 2005-10-22 17:17:44Z lha $");
#if defined(IPPROTO_IP) && defined(IP_TOS)
int tos = -1;
#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
char *hostname;
static char _hostname[MaxHostNameLen];
typedef int (*intrtn_t)(int, char**);
static int call(intrtn_t, ...);
typedef struct {
char *name; /* command name */
char *help; /* help string (NULL for no help) */
int (*handler)(); /* 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];
static void
makeargv()
{
char *cp, *cp2, c;
char **argp = margv;
margc = 0;
cp = line;
if (*cp == '!') { /* Special case shell escape */
/* save for shell command */
strlcpy(saveline, line, sizeof(saveline));
*argp++ = "!"; /* No room in string to get this */
margc++;
cp++;
}
while ((c = *cp)) {
int inquote = 0;
while (isspace((unsigned char)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((unsigned char)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 char
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 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 {
char *name; /* How user refers to it (case independent) */
char *help; /* Help information (0 ==> no help) */
int needconnect; /* Need to be connected */
int narg; /* Number of arguments */
int (*handler)(); /* 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, 0, 2, AO },
{ "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT },
{ "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK },
{ "break", 0, 1, 0, 0, 2, BREAK },
{ "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC },
{ "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL },
{ "escape", "Send current escape character", 1, 0, send_esc, 1, 0 },
{ "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA },
{ "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP },
{ "intp", 0, 1, 0, 0, 2, IP },
{ "interrupt", 0, 1, 0, 0, 2, IP },
{ "intr", 0, 1, 0, 0, 2, IP },
{ "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP },
{ "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR },
{ "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT },
{ "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP },
{ "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF },
{ "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 },
{ "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 },
{ "?", "Display send options", 0, 0, send_help, 0, 0 },
{ "help", 0, 0, 0, send_help, 0, 0 },
{ "do", 0, 0, 1, send_docmd, 3, 0 },
{ "dont", 0, 0, 1, send_dontcmd, 3, 0 },
{ "will", 0, 0, 1, send_willcmd, 3, 0 },
{ "wont", 0, 0, 1, send_wontcmd, 3, 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\r\n");
printf("'send ?' for help\r\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'\r\n'send ?' for help.\r\n",
argv[i]);
return 0;
} else if (Ambiguous(s)) {
printf("Ambiguous send argument '%s'\r\n'send ?' for help.\r\n",
argv[i]);
return 0;
}
if (i + s->narg >= argc) {
fprintf(stderr,
"Need %d argument%s to 'send %s' command. 'send %s ?' for help.\r\n",
s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
return 0;
}
count += s->nbyte;
if (s->handler == send_help) {
send_help();
return 0;
}
i += s->narg;
needconnect += s->needconnect;
}
if (!connected && needconnect) {
printf("?Need to be connected first.\r\n");
printf("'send ?' for help\r\n");
return 0;
}
/* Now, do we have enough room? */
if (NETROOM() < count) {
printf("There is not enough room in the buffer TO the network\r\n");
printf("to process your request. Nothing will be done.\r\n");
printf("('send synch' will throw away most data in the network\r\n");
printf("buffer, if this might help.)\r\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!\r\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_tncmd(void (*func)(), char *cmd, char *name);
static int
send_esc()
{
NETADD(escape);
return 1;
}
static int
send_docmd(char *name)
{
return(send_tncmd(send_do, "do", name));
}
static int
send_dontcmd(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));
}
extern char *telopts[]; /* XXX */
static int
send_tncmd(void (*func)(), char *cmd, char *name)
{
char **cpp;
int val = 0;
if (isprefix(name, "help") || isprefix(name, "?")) {
int col, len;
printf("Usage: send %s <value|option>\r\n", cmd);
printf("\"value\" must be from 0 to 255\r\n");
printf("Valid options are:\r\n\t");
col = 8;
for (cpp = telopts; *cpp; cpp++) {
len = strlen(*cpp) + 3;
if (col + len > 65) {
printf("\r\n\t");
col = 8;
}
printf(" \"%s\"", *cpp);
col += len;
}
printf("\r\n");
return 0;
}
cpp = genget(name, telopts, sizeof(char *));
if (Ambiguous(cpp)) {
fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\r\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).\r\n",
name, cmd);
return 0;
} else if (val < 0 || val > 255) {
fprintf(stderr, "'%s': bad value ('send %s ?' for help).\r\n",
name, cmd);
return 0;
}
}
if (!connected) {
printf("?Need to be connected first.\r\n");
return 0;
}
(*func)(val, 1);
return 1;
}
static int
send_help()
{
struct sendlist *s; /* pointer to current command */
for (s = Sendlist; s->name; s++) {
if (s->help)
printf("%-15s %s\r\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()
{
donelclchars = 1;
return 1;
}
static int
togdebug()
{
#ifndef NOT43
if (net > 0 &&
(SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
perror("setsockopt (SO_DEBUG)");
}
#else /* NOT43 */
if (debug) {
if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0)
perror("setsockopt (SO_DEBUG)");
} else
printf("Cannot turn off socket debugging\r\n");
#endif /* NOT43 */
return 1;
}
#if defined(KRB4) && defined(HAVE_KRB_DISABLE_DEBUG)
#include <krb.h>
static int
togkrbdebug(void)
{
if(krb_debug)
krb_enable_debug();
else
krb_disable_debug();
return 1;
}
#endif
static int
togcrlf()
{
if (crlf) {
printf("Will send carriage returns as telnet <CR><LF>.\r\n");
} else {
printf("Will send carriage returns as telnet <CR><NUL>.\r\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.\r\n");
} else {
printf("Negotiating binary mode with remote host.\r\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.\r\n");
} else {
printf("Negotiating network ascii mode with remote host.\r\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.\r\n");
} else {
printf("Negotiating binary mode on input.\r\n");
tel_enter_binary(1);
}
} else {
if (my_want_state_is_dont(TELOPT_BINARY)) {
printf("Already receiving in network ascii mode.\r\n");
} else {
printf("Negotiating network ascii mode on input.\r\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.\r\n");
} else {
printf("Negotiating binary mode on output.\r\n");
tel_enter_binary(2);
}
} else {
if (my_want_state_is_wont(TELOPT_BINARY)) {
printf("Already transmitting in network ascii mode.\r\n");
} else {
printf("Negotiating network ascii mode on output.\r\n");
tel_leave_binary(2);
}
}
return 1;
}
static int togglehelp (void);
#if defined(AUTHENTICATION)
extern int auth_togdebug (int);
#endif
#if defined(ENCRYPTION)
extern int EncryptAutoEnc (int);
extern int EncryptAutoDec (int);
extern int EncryptDebug (int);
extern int EncryptVerbose (int);
#endif
struct togglelist {
char *name; /* name of toggle */
char *help; /* help message */
int (*handler)(); /* routine to do actual setting */
int *variable;
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" },
#if defined(AUTHENTICATION)
{ "autologin",
"automatic sending of login and/or authentication info",
0,
&autologin,
"send login name and/or authentication information" },
{ "authdebug",
"authentication debugging",
auth_togdebug,
0,
"print authentication debugging information" },
#endif
#if defined(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",
"verbose encryption output",
EncryptVerbose,
0,
"print verbose encryption output" },
{ "encdebug",
"encryption debugging",
EncryptDebug,
0,
"print encryption debugging information" },
#endif
#if defined(KRB5)
{ "forward",
"credentials forwarding",
kerberos5_set_forward,
0,
"forward credentials" },
{ "forwardable",
"forwardable flag of forwarded credentials",
kerberos5_set_forwardable,
0,
"forward forwardable credentials" },
#endif
{ "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>",
togcrlf,
&crlf,
0 },
{ "crmod",
"mapping of received carriage returns",
0,
&crmod,
"map carriage return on output" },
{ "localchars",
"local recognition of certain control characters",
lclchars,
&localchars,
"recognize certain control characters" },
{ " ", "", 0 }, /* empty line */
{ "debug",
"debugging",
togdebug,
&debug,
"turn on socket level debugging" },
#if defined(KRB4) && defined(HAVE_KRB_DISABLE_DEBUG)
{ "krb_debug",
"kerberos 4 debugging",
togkrbdebug,
&krb_debug,
"turn on kerberos 4 debugging" },
#endif
{ "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",
"printing of hexadecimal terminal data (debugging)",
0,
&termdata,
"print hexadecimal representation of terminal traffic" },
{ "?",
0,
togglehelp },
{ "help",
0,
togglehelp },
{ 0 }
};
static int
togglehelp()
{
struct togglelist *c;
for (c = Togglelist; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s toggle %s\r\n", c->name, c->help);
else
printf("\r\n");
}
}
printf("\r\n");
printf("%-15s %s\r\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\r\n", c->name, set ? "enable" : "disable",
c->help);
else
printf("\r\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.\r\n");
return 0;
}
argc--;
argv++;
while (argc--) {
name = *argv++;
c = GETTOGGLE(name);
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\r\n",
name);
return 0;
} else if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\r\n",
name);
return 0;
} else {
if (c->variable) {
*c->variable = !*c->variable; /* invert it */
if (c->actionexplanation) {
printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler) {
retval &= (*c->handler)(-1);
}
}
}
return retval;
}
/*
* The following perform the "set" command.
*/
struct termios new_tc = { 0 };
struct setlist {
char *name; /* name */
char *help; /* help information */
void (*handler)();
cc_t *charp; /* where it is located at */
};
static struct setlist Setlist[] = {
#ifdef KLUDGELINEMODE
{ "echo", "character to toggle local echoing on/off", 0, &echoc },
#endif
{ "escape", "character to escape back to telnet command mode", 0, &escape },
{ "rlogin", "rlogin escape character", 0, &rlogin },
{ "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
{ " ", "" },
{ " ", "The following need 'localchars' to be toggled true", 0, 0 },
{ "flushoutput", "character to cause an Abort Output", 0, &termFlushChar },
{ "interrupt", "character to cause an Interrupt Process", 0, &termIntChar },
{ "quit", "character to cause an Abort process", 0, &termQuitChar },
{ "eof", "character to cause an EOF ", 0, &termEofChar },
{ " ", "" },
{ " ", "The following are for local editing in linemode", 0, 0 },
{ "erase", "character to use to erase a character", 0, &termEraseChar },
{ "kill", "character to use to erase a line", 0, &termKillChar },
{ "lnext", "character to use for literal next", 0, &termLiteralNextChar },
{ "susp", "character to cause a Suspend Process", 0, &termSuspChar },
{ "reprint", "character to use for line reprint", 0, &termRprntChar },
{ "worderase", "character to use to erase a word", 0, &termWerasChar },
{ "start", "character to use for XON", 0, &termStartChar },
{ "stop", "character to use for XOFF", 0, &termStopChar },
{ "forw1", "alternate end of line character", 0, &termForw1Char },
{ "forw2", "alternate end of line character", 0, &termForw2Char },
{ "ayt", "alternate AYT character", 0, &termAytChar },
{ 0 }
};
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'.\r\n",
control(rlogin));
} else {
escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet escape character is '%s'.\r\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'\r\n'set ?' for help.\r\n");
return 0;
}
if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
for (ct = Setlist; ct->name; ct++)
printf("%-15s %s\r\n", ct->name, ct->help);
printf("\r\n");
settogglehelp(1);
printf("%-15s %s\r\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).\r\n",
argv[1]);
return 0;
} else if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\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]'\r\n'set ?' for help.\r\n");
return 0;
}
if (c->actionexplanation) {
printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler)
(*c->handler)(1);
} else if (argc != 3) {
printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n");
return 0;
} else if (Ambiguous(ct)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n",
argv[1]);
return 0;
} else if (ct->handler) {
(*ct->handler)(argv[2]);
printf("%s set to \"%s\".\r\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'.\r\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.\r\n");
return 0;
}
if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
for (ct = Setlist; ct->name; ct++)
printf("%-15s %s\r\n", ct->name, ct->help);
printf("\r\n");
settogglehelp(0);
printf("%-15s %s\r\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).\r\n",
name);
return 0;
} else if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
name);
return 0;
}
if (c->variable) {
*c->variable = 0;
if (c->actionexplanation) {
printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler)
(*c->handler)(0);
} else if (Ambiguous(ct)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
name);
return 0;
} else if (ct->handler) {
(*ct->handler)(0);
printf("%s reset to \"%s\".\r\n", ct->name, (char *)ct->charp);
} else {
*(ct->charp) = _POSIX_VDISABLE;
printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp)));
}
}
return 1;
}
/*
* The following are the data structures and routines for the
* 'mode' command.
*/
#ifdef 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()
{
#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()
{
#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;
if (my_want_state_is_wont(TELOPT_LINEMODE)) {
printf("?Need to have LINEMODE option enabled first.\r\n");
printf("'mode ?' for help.\r\n");
return 0;
}
if (on)
c = (linemode | bit);
else
c = (linemode & ~bit);
lm_mode(&c, 1, 1);
return 1;
}
static int
tn_setmode(int bit)
{
return dolmmode(bit, 1);
}
static int
tn_clearmode(int bit)
{
return dolmmode(bit, 0);
}
struct modelist {
char *name; /* command name */
char *help; /* help string */
int (*handler)(); /* routine which executes command */
int needconnect; /* Do we need to be connected to execute? */
int arg1;
};
static int modehelp(void);
static struct modelist ModeList[] = {
{ "character", "Disable LINEMODE option", docharmode, 1 },
#ifdef KLUDGELINEMODE
{ "", "(or disable obsolete line-by-line mode)", 0 },
#endif
{ "line", "Enable LINEMODE option", dolinemode, 1 },
#ifdef KLUDGELINEMODE
{ "", "(or enable obsolete line-by-line mode)", 0 },
#endif
{ "", "", 0 },
{ "", "These require the LINEMODE option to be enabled", 0 },
{ "isig", "Enable signal trapping", tn_setmode, 1, MODE_TRAPSIG },
{ "+isig", 0, tn_setmode, 1, MODE_TRAPSIG },
{ "-isig", "Disable signal trapping", tn_clearmode, 1, MODE_TRAPSIG },
{ "edit", "Enable character editing", tn_setmode, 1, MODE_EDIT },
{ "+edit", 0, tn_setmode, 1, MODE_EDIT },
{ "-edit", "Disable character editing", tn_clearmode, 1, MODE_EDIT },
{ "softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB },
{ "+softtabs", 0, tn_setmode, 1, MODE_SOFT_TAB },
{ "-softtabs", "Disable tab expansion", tn_clearmode, 1, MODE_SOFT_TAB },
{ "litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO },
{ "+litecho", 0, tn_setmode, 1, MODE_LIT_ECHO },
{ "-litecho", "Disable literal character echo", tn_clearmode, 1, MODE_LIT_ECHO },
{ "help", 0, modehelp, 0 },
#ifdef KLUDGELINEMODE
{ "kludgeline", 0, dokludgemode, 1 },
#endif
{ "", "", 0 },
{ "?", "Print help information", modehelp, 0 },
{ 0 },
};
static int
modehelp(void)
{
struct modelist *mt;
printf("format is: 'mode Mode', where 'Mode' is one of:\r\n\r\n");
for (mt = ModeList; mt->name; mt++) {
if (mt->help) {
if (*mt->help)
printf("%-15s %s\r\n", mt->name, mt->help);
else
printf("\r\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\r\n");
printf("'mode ?' for help.\r\n");
} else if ((mt = GETMODECMD(argv[1])) == 0) {
fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\r\n", argv[1]);
} else if (Ambiguous(mt)) {
fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\r\n", argv[1]);
} else if (mt->needconnect && !connected) {
printf("?Need to be connected first.\r\n");
printf("'mode ?' for help.\r\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.\r\n", tl->actionexplanation); \
}
#define doset(sl) if (sl->name && *sl->name != ' ') { \
if (sl->handler == 0) \
printf("%-15s [%s]\r\n", sl->name, control(*sl->charp)); \
else \
printf("%-15s \"%s\"\r\n", sl->name, (char *)sl->charp); \
}
if (argc == 1) {
for (tl = Togglelist; tl->name; tl++) {
dotog(tl);
}
printf("\r\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(sl) || Ambiguous(tl)) {
printf("?Ambiguous argument '%s'.\r\n", argv[i]);
return 0;
} else if (!sl && !tl) {
printf("?Unknown argument '%s'.\r\n", argv[i]);
return 0;
} else {
if (tl) {
dotog(tl);
}
if (sl) {
doset(sl);
}
}
}
}
/*@*/optionstatus();
#if defined(ENCRYPTION)
EncryptStatus();
#endif
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.\r\n",
(argc > 2)? " ":"", (argc > 2)? argv[1]: "");
if (argc > 2)
arg = argv[1];
else {
printf("new escape character: ");
fgets(buf, sizeof(buf), stdin);
arg = buf;
}
if (arg[0] != '\0')
escape = arg[0];
printf("Escape character is '%s'.\r\n", control(escape));
fflush(stdout);
return 1;
}
static int
togcrmod()
{
crmod = !crmod;
printf("Deprecated usage - please use 'toggle crmod' in the future.\r\n");
printf("%s map carriage return on output.\r\n", crmod ? "Will" : "Won't");
fflush(stdout);
return 1;
}
static int
telnetsuspend()
{
#ifdef SIGTSTP
setcommandmode();
{
long oldrows, oldcols, newrows, newcols, err;
err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
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\r\n");
#endif
return 1;
}
static int
shell(int argc, char **argv)
{
long oldrows, oldcols, newrows, newcols, err;
setcommandmode();
err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
switch(fork()) {
case -1:
perror("Fork failed\r\n");
break;
case 0:
{
/*
* Fire up the shell in the child.
*/
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], NULL);
else
execl(shellp, shellname, NULL);
perror("Execl");
_exit(1);
}
default:
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)
{
if (connected) {
shutdown(net, 2);
printf("Connection closed.\r\n");
NetClose(net);
connected = 0;
resettermname = 1;
#if defined(AUTHENTICATION) || defined(ENCRYPTION)
auth_encrypt_connect(connected);
#endif
/* reset options */
tninit();
}
if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0))
longjmp(toplevel, 1);
return 0; /* NOTREACHED */
}
int
quit(void)
{
call(bye, "bye", "fromquit", 0);
Exit(0);
return 0; /*NOTREACHED*/
}
static int
logout()
{
send_do(TELOPT_LOGOUT, 1);
netflush();
return 1;
}
/*
* The SLC command.
*/
struct slclist {
char *name;
char *help;
void (*handler)();
int arg;
};
static void slc_help(void);
struct slclist SlcList[] = {
{ "export", "Use local special character definitions",
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", 0, slc_help, 0 },
{ "?", "Print help information", slc_help, 0 },
{ 0 },
};
static void
slc_help(void)
{
struct slclist *c;
for (c = SlcList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\r\n", c->name, c->help);
else
printf("\r\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.\r\n");
return 0;
}
c = getslc(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\r\n",
argv[1]);
return 0;
}
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\r\n",
argv[1]);
return 0;
}
(*c->handler)(c->arg);
slcstate();
return 1;
}
/*
* The ENVIRON command.
*/
struct envlist {
char *name;
char *help;
void (*handler)();
int narg;
};
static void env_help (void);
struct envlist EnvList[] = {
{ "define", "Define an environment variable",
(void (*)())env_define, 2 },
{ "undefine", "Undefine an environment variable",
env_undefine, 1 },
{ "export", "Mark an environment variable for automatic export",
env_export, 1 },
{ "unexport", "Don't mark an environment variable for automatic export",
env_unexport, 1 },
{ "send", "Send an environment variable", env_send, 1 },
{ "list", "List the current environment variables",
env_list, 0 },
{ "help", 0, env_help, 0 },
{ "?", "Print help information", env_help, 0 },
{ 0 },
};
static void
env_help()
{
struct envlist *c;
for (c = EnvList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\r\n", c->name, c->help);
else
printf("\r\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.\r\n");
return 0;
}
c = getenvcmd(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\r\n",
argv[1]);
return 0;
}
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\r\n",
argv[1]);
return 0;
}
if (c->narg + 2 != argc) {
fprintf(stderr,
"Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\r\n",
c->narg < argc + 2 ? "only " : "",
c->narg, c->narg == 1 ? "" : "s", c->name);
return 0;
}
(*c->handler)(argv[2], 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;
struct env_lst *
env_find(unsigned char *var)
{
struct env_lst *ep;
for (ep = envlisthead.next; ep; ep = ep->next) {
if (strcmp((char *)ep->var, (char *)var) == 0)
return(ep);
}
return(NULL);
}
#ifdef IRIX4
#define environ _environ
#endif
void
env_init(void)
{
char **epp, *cp;
struct env_lst *ep;
for (epp = environ; *epp; epp++) {
if ((cp = strchr(*epp, '='))) {
*cp = '\0';
ep = env_define((unsigned char *)*epp,
(unsigned char *)cp+1);
ep->export = 0;
*cp = '=';
}
}
/*
* 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((unsigned char*)"DISPLAY"))
&& (*ep->value == ':'
|| strncmp((char *)ep->value, "unix:", 5) == 0)) {
char hbuf[256+1];
char *cp2 = strchr((char *)ep->value, ':');
int error;
/* XXX - should be k_gethostname? */
gethostname(hbuf, 256);
hbuf[256] = '\0';
/* If this is not the full name, try to get it via DNS */
if (strchr(hbuf, '.') == 0) {
struct addrinfo hints, *ai, *a;
memset (&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
error = getaddrinfo (hbuf, NULL, &hints, &ai);
if (error == 0) {
for (a = ai; a != NULL; a = a->ai_next)
if (a->ai_canonname != NULL) {
strlcpy (hbuf,
ai->ai_canonname,
256);
break;
}
freeaddrinfo (ai);
}
}
error = asprintf (&cp, "%s%s", hbuf, cp2);
if (error != -1) {
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((unsigned char*)"USER") == NULL) &&
(ep = env_find((unsigned char*)"LOGNAME"))) {
env_define((unsigned char *)"USER", ep->value);
env_unexport((unsigned char *)"USER");
}
env_export((unsigned char *)"DISPLAY");
env_export((unsigned char *)"PRINTER");
env_export((unsigned char *)"XAUTHORITY");
}
struct env_lst *
env_define(unsigned char *var, unsigned char *value)
{
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((char *)var);
ep->export = 1;
ep->var = (unsigned char *)strdup((char *)var);
ep->value = (unsigned char *)strdup((char *)value);
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(unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var)))
ep->export = 1;
}
void
env_unexport(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\r\n",
var);
return;
}
ep = env_find(var);
if (ep == 0) {
fprintf(stderr, "Cannot send '%s': variable not defined\r\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\r\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(unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var)))
return(ep->value);
return(NULL);
}
#if defined(AUTHENTICATION)
/*
* The AUTHENTICATE command.
*/
struct authlist {
char *name;
char *help;
int (*handler)();
int narg;
};
static int
auth_help (void);
struct authlist AuthList[] = {
{ "status", "Display current status of authentication information",
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", 0, auth_help, 0 },
{ "?", "Print help information", auth_help, 0 },
{ 0 },
};
static int
auth_help()
{
struct authlist *c;
for (c = AuthList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\r\n", c->name, c->help);
else
printf("\r\n");
}
}
return 0;
}
static int
auth_cmd(int argc, char **argv)
{
struct authlist *c;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'auth' command. 'auth ?' for help.\r\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).\r\n",
argv[1]);
return 0;
}
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\r\n",
argv[1]);
return 0;
}
if (c->narg + 2 != argc) {
fprintf(stderr,
"Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\r\n",
c->narg < argc + 2 ? "only " : "",
c->narg, c->narg == 1 ? "" : "s", c->name);
return 0;
}
return((*c->handler)(argv[2], argv[3]));
}
#endif
#if defined(ENCRYPTION)
/*
* The ENCRYPT command.
*/
struct encryptlist {
char *name;
char *help;
int (*handler)();
int needconnect;
int minarg;
int maxarg;
};
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 encryptiong type. ('encrypt type ?' for more)",
EncryptType, 0, 1, 1 },
{ "start", "Start encryption. ('encrypt start ?' for more)",
EncryptStart, 1, 0, 1 },
{ "stop", "Stop encryption. ('encrypt stop ?' for more)",
EncryptStop, 1, 0, 1 },
{ "input", "Start encrypting the input stream",
EncryptStartInput, 1, 0, 0 },
{ "-input", "Stop encrypting the input stream",
EncryptStopInput, 1, 0, 0 },
{ "output", "Start encrypting the output stream",
EncryptStartOutput, 1, 0, 0 },
{ "-output", "Stop encrypting the output stream",
EncryptStopOutput, 1, 0, 0 },
{ "status", "Display current status of authentication information",
EncryptStatus, 0, 0, 0 },
{ "help", 0, EncryptHelp, 0, 0, 0 },
{ "?", "Print help information", EncryptHelp, 0, 0, 0 },
{ 0 },
};
static int
EncryptHelp()
{
struct encryptlist *c;
for (c = EncryptList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\r\n", c->name, c->help);
else
printf("\r\n");
}
}
return 0;
}
static int
encrypt_cmd(int argc, char **argv)
{
struct encryptlist *c;
c = (struct encryptlist *)
genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\r\n",
argv[1]);
return 0;
}
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\r\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.\r\n",
c->name);
return 0;
}
if (c->needconnect && !connected) {
if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
printf("?Need to be connected first.\r\n");
return 0;
}
}
return ((*c->handler)(argc > 0 ? argv[2] : 0,
argc > 1 ? argv[3] : 0,
argc > 2 ? argv[4] : 0));
}
#endif
/*
* Print status about the connection.
*/
static int
status(int argc, char **argv)
{
if (connected) {
printf("Connected to %s.\r\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\r\n");
printf("%s line editing\r\n", (mode&MODE_EDIT) ? "Local" : "No");
printf("%s catching of signals\r\n",
(mode&MODE_TRAPSIG) ? "Local" : "No");
slcstate();
#ifdef KLUDGELINEMODE
} else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
printf("Operating in obsolete linemode\r\n");
#endif
} else {
printf("Operating in single character mode\r\n");
if (localchars)
printf("Catching signals locally\r\n");
}
printf("%s character echo\r\n", (mode&MODE_ECHO) ? "Local" : "Remote");
if (my_want_state_is_will(TELOPT_LFLOW))
printf("%s flow control\r\n", (mode&MODE_FLOW) ? "Local" : "No");
#if defined(ENCRYPTION)
encrypt_display();
#endif
}
} else {
printf("No connection.\r\n");
}
printf("Escape character is '%s'.\r\n", control(escape));
fflush(stdout);
return 1;
}
#ifdef SIGINFO
/*
* Function that gets called when SIGINFO is received.
*/
RETSIGTYPE
ayt_status(int ignore)
{
call(status, "status", "notmuch", 0);
}
#endif
static Command *getcmd(char *name);
static void
cmdrc(char *m1, char *m2)
{
static char rcname[128];
Command *c;
FILE *rcfile;
int gotmachine = 0;
int l1 = strlen(m1);
int l2 = strlen(m2);
char m1save[64];
if (skiprc)
return;
strlcpy(m1save, m1, sizeof(m1save));
m1 = m1save;
if (rcname[0] == 0) {
char *home = getenv("HOME");
snprintf (rcname, sizeof(rcname), "%s/.telnetrc",
home ? home : "");
}
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((unsigned char)line[0]))
gotmachine = 0;
}
if (gotmachine == 0) {
if (isspace((unsigned char)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(c)) {
printf("?Ambiguous command: %s\r\n", margv[0]);
continue;
}
if (c == 0) {
printf("?Invalid command: %s\r\n", margv[0]);
continue;
}
/*
* This should never happen...
*/
if (c->needconnect && !connected) {
printf("?Need to be connected first for %s.\r\n", margv[0]);
continue;
}
(*c->handler)(margc, margv);
}
fclose(rcfile);
}
int
tn(int argc, char **argv)
{
struct servent *sp = 0;
char *cmd, *hostp = 0, *portp = 0;
char *user = 0;
int port = 0;
/* clear the socket address prior to use */
if (connected) {
printf("?Already connected to %s\r\n", hostname);
return 0;
}
if (argc < 2) {
strlcpy(line, "open ", sizeof(line));
printf("(to) ");
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 = strdup(*argv++);
--argc;
continue;
}
if (strcmp(*argv, "-a") == 0) {
--argc; ++argv;
autologin = 1;
continue;
}
if (hostp == 0) {
hostp = *argv++;
--argc;
continue;
}
if (portp == 0) {
portp = *argv++;
--argc;
continue;
}
usage:
printf("usage: %s [-l user] [-a] host-name [port]\r\n", cmd);
return 0;
}
if (hostp == 0)
goto usage;
strlcpy (_hostname, hostp, sizeof(_hostname));
hostp = _hostname;
if (hostp[0] == '@' || hostp[0] == '!') {
char *p;
hostname = NULL;
for (p = hostp + 1; *p; p++) {
if (*p == ',' || *p == '@')
hostname = p;
}
if (hostname == NULL) {
fprintf(stderr, "%s: bad source route specification\n", hostp);
return 0;
}
*hostname++ = '\0';
} else
hostname = hostp;
if (portp) {
if (*portp == '-') {
portp++;
telnetport = 1;
} else
telnetport = 0;
port = atoi(portp);
if (port == 0) {
sp = roken_getservbyname(portp, "tcp");
if (sp)
port = sp->s_port;
else {
printf("%s: bad port number\r\n", portp);
return 0;
}
} else {
port = htons(port);
}
} else {
if (sp == 0) {
sp = roken_getservbyname("telnet", "tcp");
if (sp == 0) {
fprintf(stderr, "telnet: tcp/telnet: unknown service\r\n");
return 0;
}
port = sp->s_port;
}
telnetport = 1;
}
{
struct addrinfo *ai, *a, hints;
int error;
char portstr[NI_MAXSERV];
memset (&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_CANONNAME;
snprintf (portstr, sizeof(portstr), "%u", ntohs(port));
error = getaddrinfo (hostname, portstr, &hints, &ai);
if (error) {
fprintf (stderr, "%s: %s\r\n", hostname, gai_strerror (error));
return 0;
}
for (a = ai; a != NULL && connected == 0; a = a->ai_next) {
char addrstr[256];
if (a->ai_canonname != NULL)
strlcpy (_hostname, a->ai_canonname, sizeof(_hostname));
if (getnameinfo (a->ai_addr, a->ai_addrlen,
addrstr, sizeof(addrstr),
NULL, 0, NI_NUMERICHOST) != 0)
strlcpy (addrstr, "unknown address", sizeof(addrstr));
printf("Trying %s...\r\n", addrstr);
net = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
if (net < 0) {
warn ("socket");
continue;
}
#if defined(IP_OPTIONS) && defined(IPPROTO_IP) && defined(HAVE_SETSOCKOPT)
if (hostp[0] == '@' || hostp[0] == '!') {
char *srp = 0;
int srlen;
int proto, opt;
if ((srlen = sourceroute(a, hostp, &srp, &proto, &opt)) < 0) {
(void) NetClose(net);
net = -1;
continue;
}
if (srp && setsockopt(net, proto, opt, srp, srlen) < 0)
perror("setsockopt (source route)");
}
#endif
#if defined(IPPROTO_IP) && defined(IP_TOS)
if (a->ai_family == AF_INET) {
# if defined(HAVE_GETTOSBYNAME)
struct tosent *tp;
if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
tos = tp->t_tos;
# endif
if (tos < 0)
tos = 020; /* Low Delay bit */
if (tos
&& (setsockopt(net, IPPROTO_IP, IP_TOS,
(void *)&tos, sizeof(int)) < 0)
&& (errno != ENOPROTOOPT))
perror("telnet: setsockopt (IP_TOS) (ignored)");
}
#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
perror("setsockopt (SO_DEBUG)");
}
if (connect (net, a->ai_addr, a->ai_addrlen) < 0) {
fprintf (stderr, "telnet: connect to address %s: %s\n",
addrstr, strerror(errno));
NetClose(net);
if (a->ai_next != NULL) {
continue;
} else {
freeaddrinfo (ai);
return 0;
}
}
++connected;
#if defined(AUTHENTICATION) || defined(ENCRYPTION)
auth_encrypt_connect(connected);
#endif
}
freeaddrinfo (ai);
if (connected == 0)
return 0;
}
cmdrc(hostp, hostname);
set_forward_options();
if (autologin && user == NULL)
user = (char *)get_default_username ();
if (user) {
env_define((unsigned char *)"USER", (unsigned char *)user);
env_export((unsigned char *)"USER");
}
call(status, "status", "notmuch", 0);
if (setjmp(peerdied) == 0)
my_telnet((char *)user);
NetClose(net);
ExitString("Connection closed by foreign host.\r\n",1);
/*NOTREACHED*/
return 0;
}
#define HELPINDENT ((int)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",
#if defined(AUTHENTICATION)
authhelp[] = "turn on (off) authentication ('auth ?' for more)",
#endif
#if defined(ENCRYPTION)
encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
#endif
zhelp[] = "suspend telnet",
shellhelp[] = "invoke a subshell",
envhelp[] = "change environment variables ('environ ?' for more)",
modestring[] = "try to enter line or character mode ('mode ?' for more)";
static int help(int argc, char **argv);
static Command cmdtab[] = {
{ "close", closehelp, bye, 1 },
{ "logout", logouthelp, logout, 1 },
{ "display", displayhelp, display, 0 },
{ "mode", modestring, modecmd, 0 },
{ "open", openhelp, tn, 0 },
{ "quit", quithelp, 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 },
#if defined(AUTHENTICATION)
{ "auth", authhelp, auth_cmd, 0 },
#endif
#if defined(ENCRYPTION)
{ "encrypt", encrypthelp, encrypt_cmd, 0 },
#endif
{ "z", zhelp, telnetsuspend, 0 },
{ "!", shellhelp, shell, 0 },
{ "environ", envhelp, env_cmd, 0 },
{ "?", helphelp, help, 0 },
{ 0, 0, 0, 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, togcrmod, 0 },
{ 0, 0, 0, 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, char *tbuf, int cnt)
{
Command *c;
setcommandmode();
if (!top) {
putchar('\n');
} else {
signal(SIGINT, SIG_DFL);
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\r\n", line);
} else {
getline:
if (rlogin != _POSIX_VDISABLE)
printf("%s> ", prompt);
if (fgets(line, sizeof(line), stdin) == NULL) {
if (feof(stdin) || ferror(stdin)) {
quit();
/*NOTREACHED*/
}
break;
}
}
if (line[0] == 0)
break;
makeargv();
if (margv[0] == 0) {
break;
}
c = getcmd(margv[0]);
if (Ambiguous(c)) {
printf("?Ambiguous command\r\n");
continue;
}
if (c == 0) {
printf("?Invalid command\r\n");
continue;
}
if (c->needconnect && !connected) {
printf("?Need to be connected first.\r\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:\r\n\r\n");
for (c = cmdtab; c->name; c++)
if (c->help) {
printf("%-*s\t%s\r\n", HELPINDENT, c->name,
c->help);
}
return 0;
}
while (--argc > 0) {
char *arg;
arg = *++argv;
c = getcmd(arg);
if (Ambiguous(c))
printf("?Ambiguous help command %s\r\n", arg);
else if (c == (Command *)0)
printf("?Invalid help command %s\r\n", arg);
else
printf("%s\r\n", c->help);
}
return 0;
}
#if defined(IP_OPTIONS) && defined(IPPROTO_IP)
/*
* 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. Note that leading ! is effective
* only for IPv4 case.
*
* 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:
* ai: The address (by struct addrinfo) for the final destination.
*
* arg: Pointer to route list to decipher
*
* cpp: Pointer to a pointer, so that sourceroute() can return
* the address of result buffer (statically alloc'ed).
*
* protop/optp:
* Pointer to an integer. The pointed variable
* lenp: pointer to an integer that contains the
* length of *cpp if *cpp != NULL.
*
* Return values:
*
* Returns the length of the option pointed to by *cpp. If the
* return value is -1, there was a syntax error in the
* option, either arg contained unknown characters or too many hosts,
* or hostname cannot be resolved.
*
* The caller needs to pass return value (len), *cpp, *protop and *optp
* to setsockopt(2).
*
* *cpp: Points to the result buffer. The region is statically
* allocated by the function.
*
* *protop:
* protocol # to be passed to setsockopt(2).
*
* *optp: option # to be passed to setsockopt(2).
*
*/
int
sourceroute(struct addrinfo *ai,
char *arg,
char **cpp,
int *protop,
int *optp)
{
char *cp, *cp2, *lsrp = NULL, *lsrep = NULL;
struct addrinfo hints, *res;
int len, error;
struct sockaddr_in *sin;
register char c;
static char lsr[44];
#ifdef INET6
struct cmsghdr *cmsg = NULL;
struct sockaddr_in6 *sin6;
static char rhbuf[1024];
#endif
/*
* Verify the arguments.
*/
if (cpp == NULL)
return -1;
cp = arg;
*cpp = NULL;
switch (ai->ai_family) {
case AF_INET:
lsrp = lsr;
lsrep = lsrp + sizeof(lsr);
/*
* 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;
cp++;
*protop = IPPROTO_IP;
*optp = IP_OPTIONS;
break;
#ifdef INET6
case AF_INET6:
/* this needs to be updated for rfc2292bis */
#ifdef IPV6_PKTOPTIONS
cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0);
if (*cp != '@')
return -1;
cp++;
*protop = IPPROTO_IPV6;
*optp = IPV6_PKTOPTIONS;
break;
#else
return -1;
#endif
#endif
default:
return -1;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = ai->ai_family;
hints.ai_socktype = SOCK_STREAM;
for (c = 0;;) {
if (c == ':')
cp2 = 0;
else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) {
if (c == ',') {
*cp2++ = '\0';
if (*cp2 == '@')
cp2++;
} else if (c == '@') {
*cp2++ = '\0';
}
#if 0 /*colon conflicts with IPv6 address*/
else if (c == ':') {
*cp2++ = '\0';
}
#endif
else
continue;
break;
}
if (!c)
cp2 = 0;
error = getaddrinfo(cp, NULL, &hints, &res);
if (error) {
fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
return -1;
}
if (ai->ai_family != res->ai_family) {
freeaddrinfo(res);
return -1;
}
if (ai->ai_family == AF_INET) {
/*
* Check to make sure there is space for address
*/
if (lsrp + 4 > lsrep) {
freeaddrinfo(res);
return -1;
}
sin = (struct sockaddr_in *)res->ai_addr;
memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr));
lsrp += sizeof(struct in_addr);
}
#ifdef INET6
else if (ai->ai_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)res->ai_addr;
inet6_rthdr_add(cmsg, &sin6->sin6_addr,
IPV6_RTHDR_LOOSE);
}
#endif
else {
freeaddrinfo(res);
return -1;
}
freeaddrinfo(res);
if (cp2)
cp = cp2;
else
break;
}
if (ai->ai_family == AF_INET) {
/* record the last hop */
if (lsrp + 4 > lsrep)
return -1;
sin = (struct sockaddr_in *)ai->ai_addr;
memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr));
lsrp += sizeof(struct in_addr);
#ifndef sysV88
lsr[IPOPT_OLEN] = lsrp - lsr;
if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40)
return -1;
*lsrp++ = IPOPT_NOP; /*32bit word align*/
len = lsrp - lsr;
*cpp = lsr;
#else
ipopt.io_len = lsrp - lsr;
if (ipopt.io_len <= 5) /*is 3 better?*/
return -1;
*cpp = (char 8)&ipopt;
#endif
}
#ifdef INET6
else if (ai->ai_family == AF_INET6) {
inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
len = cmsg->cmsg_len;
*cpp = rhbuf;
}
#endif
else
return -1;
return len;
}
#endif