/*
* Copyright (c) 1988, 1990 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.
*/
/*
* From: @(#)commands.c 5.5 (Berkeley) 3/22/91
*/
char cmd_rcsid[] =
"$Id: commands.cc,v 1.34 2000/07/23 04:16:24 dholland Exp $";
#include <string.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#ifdef CRAY
#include <fcntl.h>
#endif /* CRAY */
#include <sys/wait.h>
#include <signal.h>
#include <netdb.h>
#include <ctype.h>
#include <pwd.h>
#include <stdarg.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <arpa/telnet.h>
#include "ring.h"
#include "externs.h"
#include "defines.h"
#include "types.h"
#include "genget.h"
#include "environ.h"
#include "proto.h"
#include "ptrarray.h"
#include "netlink.h"
/* In Linux, this is an enum */
#if defined(__linux__) || defined(IPPROTO_IP)
#define HAS_IPPROTO_IP
#endif
#ifndef CRAY
#if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix)
#include <machine/endian.h>
#endif /* vax */
#endif /* CRAY */
#define HELPINDENT ((int) sizeof ("connect"))
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif /* MAXHOSTNAMELEN */
#if defined(HAS_IPPROTO_IP) && defined(IP_TOS)
int tos = -1;
#endif /* defined(HAS_IPPROTO_IP) && defined(IP_TOS) */
static unsigned long sourceroute(char *arg, char **cpp, int *lenp);
char *hostname;
static char _hostname[MAXHOSTNAMELEN];
//typedef int (*intrtn_t)(int argc, const char *argv[]);
class command_entry;
typedef ptrarray<command_entry> command_table;
static int process_command(command_table *tab, int argc, const char **argv);
class command_entry {
protected:
const char *name; /* command name */
const char *help; /* help string (NULL for no help) */
int nargs;
union { /* routine which executes command */
command_table *subhandler;
int (*handlern)(int, const char **);
int (*handler0)(void);
int (*handler1)(const char *);
int (*handler2)(const char *, const char *);
};
public:
command_entry(const char *n, const char *e,
int (*h)(int, const char **))
{
name = n;
help = e;
nargs = -1; handlern = h;
}
command_entry(const char *n, const char *e,
int (*h)(void))
{
name = n;
help = e;
nargs = 0; handler0 = h;
}
command_entry(const char *n, const char *e,
int (*h)(const char *))
{
name = n;
help = e;
nargs = 1; handler1 = h;
}
command_entry(const char *n, const char *e,
int (*h)(const char *, const char *))
{
name = n;
help = e;
nargs = 2; handler2 = h;
}
command_entry(const char *n, const char *e, command_table *sub) {
name = n;
help = e;
nargs = -2;
subhandler = sub;
}
int call(int argc, const char *argv[]) {
assert(argc>=1);
if (nargs>=0 && argc!=nargs+1) {
fprintf(stderr, "Wrong number of arguments for command.\n");
fprintf(stderr, "Try %s ? for help\n", argv[0]);
return 0; /* is this right? */
}
if (nargs==-2) {
if (argc<2) {
fprintf(stderr, "`%s' requires a subcommand.\n", argv[0]);
fprintf(stderr, "Try %s ? for help\n", argv[0]);
return 0; /* is this right? */
}
return process_command(subhandler, argc-1, argv+1);
}
else if (nargs==-1) return handlern(argc, argv);
else if (nargs==0) return handler0();
else if (nargs==1) return handler1(argv[1]);
else if (nargs==2) return handler2(argv[1], argv[2]);
return 0;
}
void describe() {
if (help) printf("%-*s\t%s\n", HELPINDENT, name, help);
}
void gethelp() {
if (help) printf("%s\n", help);
else printf("No help available\n");
}
const char *getname() const { return name; }
};
static char line[256];
static char saveline[256];
static int margc;
static const char *margv[20];
static void makeargv(void) {
register char *cp, *cp2, c;
register const char **argp = margv;
margc = 0;
cp = line;
if (*cp == '!') { /* Special case shell escape */
strcpy(saveline, line); /* save for shell command */
*argp++ = "!"; /* No room in string to get this */
margc++;
cp++;
}
while ((c = *cp)!=0) {
register 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(const 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....
*/
register 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)(const char *, const 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(const char *, const char *);
static int send_help(const char *, const char *);
static int send_docmd(const char *, const char *);
static int send_dontcmd(const char *, const char *);
static int send_willcmd(const char *, const char *);
static int send_wontcmd(const char *, const char *);
extern int send_do(int, int);
extern int send_dont(int, int);
extern int send_will(int, int);
extern int send_wont(int, int);
static int dosynch1(const char *, const char *) { return dosynch(); }
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, dosynch1, 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, 0, 0, 0, 0, 0, 0 }
};
#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
sizeof(struct sendlist)))
static int sendcmd(int argc, const char *argv[]) {
int count; /* how many bytes we are going to need to send */
int i;
/* int question = 0;*/ /* was at least one argument a question */
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 (s == AMBIGUOUS) {
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 (s->handler == send_help) {
send_help(NULL, NULL);
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 (netoring.empty_count() < 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(const char *, const char *) {
NETADD(escapechar);
return 1;
}
static int send_docmd(const char *name, const char *) {
return send_tncmd(send_do, "do", name);
}
static int send_dontcmd(const char *name, const char *) {
return(send_tncmd(send_dont, "dont", name));
}
static int send_willcmd(const char *name, const char *) {
return(send_tncmd(send_will, "will", name));
}
static int send_wontcmd(const char *name, const char *) {
return(send_tncmd(send_wont, "wont", name));
}
int send_tncmd(int (*func)(int, int), const char *cmd, const char *name) {
char **cpp;
extern char *telopts[];
if (isprefix(name, "help") || isprefix(name, "?")) {
register int col, len;
printf("Usage: send %s <option>\n", cmd);
printf("Valid options are:\n\t");
col = 8;
for (cpp = telopts; *cpp; cpp++) {
len = strlen(*cpp) + 1;
if (col + len > 65) {
printf("\n\t");
col = 8;
}
printf(" %s", *cpp);
col += len;
}
printf("\n");
return 0;
}
cpp = genget(name, telopts, sizeof(char *));
if (cpp == AMBIGUOUS) {
fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
name, cmd);
return 0;
}
if (cpp == 0) {
fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
name, cmd);
return 0;
}
if (!connected) {
printf("?Need to be connected first.\n");
return 0;
}
(*func)(cpp - telopts, 1);
return 1;
}
static int send_help(const char *, const char *) {
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(int) {
donelclchars = 1;
return 1;
}
static int togdebug(int) {
return nlink.setdebug(debug);
}
static int togcrlf(int) {
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;
}
static int netdata; /* Print out network data flow */
static int prettydump; /* Print "netdata" output in user readable format */
static int termdata; /* Print out terminal data flow */
static int togglehelp(int);
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",
NULL, &autoflush,
"flush output when sending interrupt characters" },
{ "autosynch", "automatic sending of interrupt characters in urgent mode",
NULL, &autosynch,
"send interrupt characters in urgent mode" },
#if 0
{ "autologin", "automatic sending of login and/or authentication info",
NULL, &autologin,
"send login name and/or authentication information" },
{ "authdebug", "Toggle authentication debugging",
auth_togdebug, NULL,
"print authentication debugging information" },
{ "autoencrypt", "automatic encryption of data stream",
EncryptAutoEnc, NULL,
"automatically encrypt output" },
{ "autodecrypt", "automatic decryption of data stream",
EncryptAutoDec, NULL,
"automatically decrypt input" },
{ "verbose_encrypt", "Toggle verbose encryption output",
EncryptVerbose, NULL,
"print verbose encryption output" },
{ "encdebug", "Toggle encryption debugging",
EncryptDebug, NULL,
"print encryption debugging information" },
#endif
{ "skiprc", "don't read ~/.telnetrc file",
NULL, &skiprc,
"read ~/.telnetrc file" },
{ "binary",
"sending and receiving of binary data",
togbinary, NULL,
NULL },
{ "inbinary", "receiving of binary data",
togrbinary, NULL,
NULL },
{ "outbinary", "sending of binary data",
togxbinary, 0,
NULL },
{ "crlf", "sending carriage returns as telnet <CR><LF>",
togcrlf, &crlf,
NULL },
{ "crmod", "mapping of received carriage returns",
NULL, &crmod,
"map carriage return on output" },
{ "localchars", "local recognition of certain control characters",
lclchars, &localchars,
"recognize certain control characters" },
{ " ", "", 0, 0, 0 }, /* empty line */
#if defined(TN3270) && !defined(__linux__)
{ "apitrace", "(debugging) toggle tracing of API transactions",
NULL, &apitrace,
"trace API transactions" },
{ "cursesdata", "(debugging) toggle printing of hexadecimal curses data",
NULL, &cursesdata,
"print hexadecimal representation of curses data" },
#endif /* TN3270 and not linux */
{ "debug", "debugging",
togdebug, &debug,
"turn on socket level debugging" },
{ "netdata", "printing of hexadecimal network data (debugging)",
NULL, &netdata,
"print hexadecimal representation of network traffic" },
{ "prettydump","output of \"netdata\" to user readable format (debugging)",
NULL, &prettydump,
"print user readable output for \"netdata\"" },
{ "options", "viewing of options processing (debugging)",
NULL, &showoptions,
"show option processing" },
{ "termdata", "(debugging) toggle printing of hexadecimal terminal data",
NULL, &termdata,
"print hexadecimal representation of terminal traffic" },
{ "?", NULL, togglehelp, 0, 0 },
{ "help", NULL, togglehelp, 0, 0 },
{ 0, 0, 0, 0, 0 }
};
static int togglehelp(int) {
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, const char *argv[]) {
int retval = 1;
const 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 (c == AMBIGUOUS) {
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.
*/
struct setlist {
const char *name; /* name */
const char *help; /* help information */
void (*handler)(const char *);
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, &escapechar },
{ "rlogin", "rlogin escape character", 0, &rlogin },
{ "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
{ " ", "", 0, 0 },
{ " ", "The following need 'localchars' to be toggled true", 0, 0 },
{ "flushoutput", "character to cause an Abort Output", 0, termFlushCharp },
{ "interrupt", "character to cause an Interrupt Process", 0, termIntCharp },
{ "quit", "character to cause an Abort process", 0, termQuitCharp },
{ "eof", "character to cause an EOF ", 0, termEofCharp },
{ " ", "", 0, 0 },
{ " ", "The following are for local editing in linemode", 0, 0 },
{ "erase", "character to use to erase a character", 0, termEraseCharp },
{ "kill", "character to use to erase a line", 0, termKillCharp },
{ "lnext", "character to use for literal next", 0, termLiteralNextCharp },
{ "susp", "character to cause a Suspend Process", 0, termSuspCharp },
{ "reprint", "character to use for line reprint", 0, termRprntCharp },
{ "worderase", "character to use to erase a word", 0, termWerasCharp },
{ "start", "character to use for XON", 0, termStartCharp },
{ "stop", "character to use for XOFF", 0, termStopCharp },
{ "forw1", "alternate end of line character", 0, termForw1Charp },
{ "forw2", "alternate end of line character", 0, termForw2Charp },
{ "ayt", "alternate AYT character", 0, termAytCharp },
{ 0, 0, 0, 0 }
};
#if defined(CRAY) && !defined(__STDC__)
/* Work around compiler bug in pcc 4.1.5 */
void
_setlist_init()
{
#ifndef KLUDGELINEMODE
#define N 5
#else
#define N 6
#endif
Setlist[N+0].charp = &termFlushChar;
Setlist[N+1].charp = &termIntChar;
Setlist[N+2].charp = &termQuitChar;
Setlist[N+3].charp = &termEofChar;
Setlist[N+6].charp = &termEraseChar;
Setlist[N+7].charp = &termKillChar;
Setlist[N+8].charp = &termLiteralNextChar;
Setlist[N+9].charp = &termSuspChar;
Setlist[N+10].charp = &termRprntChar;
Setlist[N+11].charp = &termWerasChar;
Setlist[N+12].charp = &termStartChar;
Setlist[N+13].charp = &termStopChar;
Setlist[N+14].charp = &termForw1Char;
Setlist[N+15].charp = &termForw2Char;
Setlist[N+16].charp = &termAytChar;
#undef N
}
#endif /* defined(CRAY) && !defined(__STDC__) */
static struct setlist *
getset(const 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 {
escapechar = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet escape character is '%s'.\n", control(escapechar));
}
}
static int setcmd(int argc, const 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 (c == AMBIGUOUS) {
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 (ct == AMBIGUOUS) {
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, const char *argv[]) {
struct setlist *ct;
struct togglelist *c;
const 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 (c == AMBIGUOUS) {
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 (ct == AMBIGUOUS) {
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(int) {
kludgelinemode = 1;
send_wont(TELOPT_LINEMODE, 1);
send_dont(TELOPT_SGA, 1);
send_dont(TELOPT_ECHO, 1);
return 0;
}
#endif
static int dolinemode(int) {
#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(int) {
#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;
}
int setmode(int bit) {
return dolmmode(bit, 1);
}
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;
};
extern int modehelp(int);
static struct modelist ModeList[] = {
{ "character", "Disable LINEMODE option", docharmode, 1,0},
#ifdef KLUDGELINEMODE
{ "", "(or disable obsolete line-by-line mode)", NULL, 0,0 },
#endif
{ "line", "Enable LINEMODE option", 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", setmode, 1, MODE_TRAPSIG },
{ "+isig", 0, setmode, 1, MODE_TRAPSIG },
{ "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
{ "edit", "Enable character editing", setmode, 1, MODE_EDIT },
{ "+edit", 0, setmode, 1, MODE_EDIT },
{ "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
{ "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB },
{ "+softtabs", 0, setmode, 1, MODE_SOFT_TAB },
{ "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
{ "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO },
{ "+litecho", 0, setmode, 1, MODE_LIT_ECHO },
{ "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
{ "help", 0, modehelp, 0, 0 },
#ifdef KLUDGELINEMODE
{ "kludgeline", 0, dokludgemode, 1, 0 },
#endif
{ "", "", 0, 0, 0 },
{ "?", "Print help information", modehelp, 0, 0 },
{ 0, 0, 0, 0, 0 },
};
int modehelp(int) {
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(const char *arg) {
struct modelist *mt;
mt = GETMODECMD(arg);
if (mt == 0) {
fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", arg);
}
else if (mt == AMBIGUOUS) {
fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", arg);
}
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 void dotog(struct togglelist *tl) {
if (tl->variable && tl->actionexplanation) {
if (*tl->variable) {
printf("will");
}
else {
printf("won't");
}
printf(" %s.\n", tl->actionexplanation);
}
}
static void doset(struct setlist *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);
}
}
}
static int display(int argc, const char *argv[]) {
struct togglelist *tl;
struct setlist *sl;
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 (sl == AMBIGUOUS || tl == AMBIGUOUS) {
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();
return 1;
}
/*
* The following are the data structures, and many of the routines,
* relating to command processing.
*/
/*
* Set the escape character.
*/
static int setescape(int argc, const char *argv[]) {
const 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')
escapechar = arg[0];
if (!In3270) {
printf("Escape character is '%s'.\n", control(escapechar));
}
(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");
fflush(stdout);
return 1;
}
int suspend(void) {
#ifdef SIGTSTP
setcommandmode();
{
long oldrows, oldcols, newrows, newcols, err;
err = TerminalWindowSize(&oldrows, &oldcols);
(void) kill(0, SIGTSTP);
err += TerminalWindowSize(&newrows, &newcols);
if (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;
}
#if !defined(TN3270)
int shell(int argc, const char **) {
setcommandmode();
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 = rindex(shellp, '/')) == 0)
shellname = shellp;
else
shellname++;
if (argc > 1)
execl(shellp, shellname, "-c", &saveline[1], 0);
else
execl(shellp, shellname, 0);
perror("Execl");
_exit(1);
}
default:
wait(NULL); /* Wait for the shell to complete */
}
return 1;
}
#endif /* !defined(TN3270) */
static int dobye(int isfromquit) {
extern int resettermname;
if (connected) {
nlink.close(1);
printf("Connection closed.\n");
connected = 0;
resettermname = 1;
/* reset options */
tninit();
#if defined(TN3270)
SetIn3270(); /* Get out of 3270 mode */
#endif /* defined(TN3270) */
}
if (!isfromquit) {
siglongjmp(toplevel, 1);
/* NOTREACHED */
}
return 1; /* Keep lint, etc., happy */
}
static int bye(void) {
if (!connected) {
printf("Need to be connected first for `bye'.\n");
return 0;
}
return dobye(0);
}
void quit(void) {
dobye(1);
Exit(0);
}
int logout(void) {
if (!connected) {
printf("Need to be connected first for `logout'.\n");
return 0;
}
send_do(TELOPT_LOGOUT, 1);
netflush();
return 1;
}
/*
* The ENVIRON command.
*/
struct envcmd {
const char *name;
const char *help;
void (*handler)(const char *, const char *);
int narg;
};
static void env_help(const char *, const char *);
typedef void (*envfunc)(const char *, const char *);
struct envcmd EnvList[] = {
{ "define", "Define an environment variable",
env_define, 2 },
{ "undefine", "Undefine an environment variable",
(envfunc) env_undefine, 1 },
{ "export", "Mark an environment variable for automatic export",
(envfunc) env_export, 1 },
{ "unexport", "Don't mark an environment variable for automatic export",
(envfunc) env_unexport, 1 },
{ "send", "Send an environment variable", (envfunc) env_send, 1 },
{ "list", "List the current environment variables",
(envfunc) env_list, 0 },
{ "help", 0, env_help, 0 },
{ "?", "Print help information", env_help, 0 },
{ 0, 0, 0, 0 },
};
static void env_help(const char *, const char *) {
struct envcmd *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 envcmd *getenvcmd(const char *name) {
return (struct envcmd *)
genget(name, (char **) EnvList, sizeof(struct envcmd));
}
int env_cmd(int argc, const char *argv[]) {
struct envcmd *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 (c == AMBIGUOUS) {
fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
argv[1]);
return 0;
}
if (c->narg + 2 != 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)(argv[2], argv[3]);
return 1;
}
/*
* The AUTHENTICATE command.
*
* auth status Display status
* auth disable Disable an authentication type
* auth enable Enable an authentication type
*
* The ENCRYPT command.
*
* encrypt enable Enable encryption
* encrypt disable Disable encryption
* encrypt type foo Set encryption type
* encrypt start Start encryption
* encrypt stop Stop encryption
* encrypt input Start encrypting input stream
* encrypt -input Stop encrypting input stream
* encrypt output Start encrypting output stream
* encrypt -output Stop encrypting output stream
* encrypt status Print status
*/
#ifdef TN3270
char *oflgs[] = { "read-only", "write-only", "read-write" };
static void filestuff(int fd) {
int res;
#ifdef F_GETOWN
setconnmode(0);
res = fcntl(fd, F_GETOWN, 0);
setcommandmode();
if (res == -1) {
perror("fcntl");
return;
}
printf("\tOwner is %d.\n", res);
#endif
setconnmode(0);
res = fcntl(fd, F_GETFL, 0);
setcommandmode();
if (res == -1) {
perror("fcntl");
return;
}
printf("\tFlags are 0x%x: %s\n", res, oflgs[res]);
}
#endif /* TN3270 */
/*
* Print status about the connection.
*/
static int dostatus(int notmuch) {
if (connected) {
printf("Connected to %s.\n", hostname);
if (!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");
}
}
else {
printf("No connection.\n");
}
#if !defined(TN3270)
printf("Escape character is '%s'.\n", control(escapechar));
(void) fflush(stdout);
#else /* !defined(TN3270) */
if ((!In3270) && !notmuch) {
printf("Escape character is '%s'.\n", control(escape));
}
if ((argc >= 2) && !strcmp(argv[1], "everything")) {
printf("SIGIO received %d time%s.\n",
sigiocount, (sigiocount == 1)? "":"s");
if (In3270) {
printf("Process ID %d, process group %d.\n",
getpid(), getpgrp(getpid()));
printf("Terminal input:\n");
filestuff(tin);
printf("Terminal output:\n");
filestuff(tout);
printf("Network socket:\n");
filestuff(net);
}
}
if (In3270 && transcom) {
printf("Transparent mode command is '%s'.\n", transcom);
}
fflush(stdout);
if (In3270) {
return 0;
}
#endif /* TN3270 */
return 1;
}
static int status(void) {
int notmuch = 1;
return dostatus(notmuch);
}
#ifdef SIGINFO
/*
* Function that gets called when SIGINFO is received.
*/
void ayt_status(int) {
dostatus(1);
}
#endif
int tn(int argc, const char *argv[]) {
register struct hostent *host = 0;
struct sockaddr_in sn;
struct servent *sp = 0;
char *srp = NULL;
int srlen;
const char *cmd, *volatile user = 0;
const char *portp = NULL;
char *hostp = NULL;
/* clear the socket address prior to use */
memset(&sn, 0, sizeof(sn));
if (connected) {
printf("?Already connected to %s\n", hostname);
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) {
/*
* Having "telnet h" print usage is really stupid...
* suppose your hostname is h?
*/
if (/*isprefix(*argv, "help") ||*/ 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 (hostp == 0) {
/* this leaks memory - FIXME */
hostp = strdup(*argv++);
--argc;
continue;
}
if (portp == 0) {
portp = *argv++;
--argc;
continue;
}
usage:
printf("usage: %s [-l user] [-a] host-name [port]\n", cmd);
return 0;
}
if (hostp == 0)
goto usage;
#if defined(IP_OPTIONS) && defined(HAS_IPPROTO_IP)
if (hostp[0] == '@' || hostp[0] == '!') {
if ((hostname = strrchr(hostp, ':')) == NULL)
hostname = strrchr(hostp, '@');
hostname++;
srp = 0;
int temp = sourceroute(hostp, &srp, &srlen);
if (temp == 0) {
herror(srp);
return 0;
} else if (temp == -1) {
printf("Bad source route option: %s\n", hostp);
return 0;
} else {
sn.sin_addr.s_addr = temp;
sn.sin_family = AF_INET;
}
}
else {
#endif
if (inet_aton(hostp, &sn.sin_addr)) {
sn.sin_family = AF_INET;
strcpy(_hostname, hostp);
hostname = _hostname;
}
else {
host = gethostbyname(hostp);
if (host) {
sn.sin_family = host->h_addrtype;
if (host->h_length > (int)sizeof(sn.sin_addr)) {
host->h_length = sizeof(sn.sin_addr);
}
#if defined(h_addr) /* In 4.3, this is a #define */
memcpy((caddr_t)&sn.sin_addr,
host->h_addr_list[0], host->h_length);
#else /* defined(h_addr) */
memcpy((caddr_t)&sn.sin_addr, host->h_addr, host->h_length);
#endif /* defined(h_addr) */
strncpy(_hostname, host->h_name, sizeof(_hostname));
_hostname[sizeof(_hostname)-1] = '\0';
hostname = _hostname;
} else {
herror(hostp);
return 0;
}
}
#if defined(IP_OPTIONS) && defined(HAS_IPPROTO_IP)
}
#endif
if (portp) {
if (*portp == '-') {
portp++;
telnetport = 1;
} else
telnetport = 0;
sn.sin_port = atoi(portp);
if (sn.sin_port == 0) {
sp = getservbyname(portp, "tcp");
if (sp)
sn.sin_port = sp->s_port;
else {
printf("%s: bad port number\n", portp);
return 0;
}
}
else {
sn.sin_port = htons(sn.sin_port);
}
}
else {
if (sp == 0) {
sp = getservbyname("telnet", "tcp");
if (sp == 0) {
fprintf(stderr, "telnet: tcp/telnet: unknown service\n");
return 0;
}
sn.sin_port = sp->s_port;
}
telnetport = 1;
}
printf("Trying %s...\n", inet_ntoa(sn.sin_addr));
do {
int x = nlink.connect(debug, host, &sn, srp, srlen, tos);
if (!x) return 0;
else if (x==1) continue;
connected++;
} while (connected == 0);
cmdrc(hostp, hostname);
if (autologin && user == NULL) {
struct passwd *pw;
user = getenv("USER");
if (user == NULL ||
((pw = getpwnam(user))!=NULL && pw->pw_uid != getuid())) {
if ((pw = getpwuid(getuid()))!=NULL)
user = pw->pw_name;
else
user = NULL;
}
}
if (user) {
env_define("USER", user);
env_export("USER");
}
dostatus(1);
if (sigsetjmp(peerdied, 1) == 0)
telnet(user);
nlink.close(0);
ExitString("Connection closed by foreign host.\n",1);
/*NOTREACHED*/
return 0;
}
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",
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)",
displayhelp[] = "display operating parameters",
#ifdef TN3270
transcomhelp[] = "specify Unix command for transparent mode pipe",
#endif /* TN3270 */
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 char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
static char escapehelp[] = "deprecated command -- use 'set escape' instead";
static int help(command_table *, int, const char **);
static int doquit(void) {
quit();
return 0;
}
static int slc_mode_import_0(void) {
slc_mode_import(0);
return 1;
}
static int slc_mode_import_1(void) {
slc_mode_import(1);
return 1;
}
static int do_slc_mode_export(void) {
slc_mode_export();
return 1;
}
static ptrarray<command_entry> cmdtab;
static ptrarray<command_entry> cmdtab2;
static ptrarray<command_entry> slctab;
#define BIND(a,b,c) cmdtab.add(new command_entry(a,b,c))
#define BIND2(a,b,c) cmdtab2.add(new command_entry(a,b,c))
#define BINDS(a,b,c) slctab.add(new command_entry(a,b,c))
void cmdtab_init(void) {
BIND("close", closehelp, bye);
BIND("logout", logouthelp, logout);
BIND("display", displayhelp, display);
BIND("mode", modestring, modecmd);
BIND("open", openhelp, tn);
BIND("quit", quithelp, doquit);
BIND("send", sendhelp, sendcmd);
BIND("set", sethelp, setcmd);
BIND("unset", unsethelp, unsetcmd);
BIND("status", statushelp, status);
BIND("toggle", togglestring, toggle);
BIND("slc", "set treatment of special characters\n", &slctab);
#ifdef TN3270
BIND("transcom", transcomhelp, settranscom);
#endif /* TN3270 */
// BIND("auth", authhelp, auth_cmd);
// BIND("encrypt", encrypthelp, encrypt_cmd);
BIND("z", zhelp, suspend);
#if defined(TN3270) /* why?! */
BIND("!", shellhelp, shell);
#endif
BIND("environ", envhelp, env_cmd);
BINDS("export", "Use local special character definitions",
do_slc_mode_export);
BINDS("import", "Use remote special character definitions",
slc_mode_import_1);
BINDS("check", "Verify remote special character definitions",
slc_mode_import_0);
BIND2("escape", escapehelp, setescape);
BIND2("crmod", crmodhelp, togcrmod);
}
static command_entry *getcmd(command_table *tab, const char *name) {
if (!strcasecmp(name, "?") ||
!strcasecmp(name, "h") ||
!strcasecmp(name, "help")) return (command_entry *)HELP;
command_entry *found = NULL;
for (int i=0; i<tab->num(); i++) {
command_entry *c = (*tab)[i];
if (!strcasecmp(c->getname(), name)) return c;
if (!strncasecmp(c->getname(), name, strlen(name))) {
if (found) return (command_entry *)AMBIGUOUS;
found = c;
}
}
if (tab==&cmdtab && !found) return getcmd(&cmdtab2, name);
return found;
}
static int process_command(command_table *tab, int argc, const char **argv) {
command_entry *c;
c = getcmd(tab, argv[0]);
if (c == HELP) {
help(tab, argc, argv);
}
else if (c == AMBIGUOUS) {
printf("?Ambiguous command\n");
}
else if (c == NULL) {
printf("?Invalid command\n");
}
else {
if (c->call(argc, argv)) return 1;
}
return 0;
}
void command(int top, const char *tbuf, int cnt) {
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 = 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)) {
quit();
/*NOTREACHED*/
}
break;
}
}
if (line[0] == 0)
break;
makeargv();
if (margv[0] == 0) {
break;
}
if (process_command(&cmdtab, margc, margv)) break;
}
if (!top) {
if (!connected) {
siglongjmp(toplevel, 1);
/*NOTREACHED*/
}
#if defined(TN3270)
if (shell_active == 0) {
setconnmode(0);
}
#else /* defined(TN3270) */
setconnmode(0);
#endif /* defined(TN3270) */
}
}
/*
* Help command.
*/
static int help(command_table *tab, int argc, const char *argv[]) {
int i;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (i = 0; i<tab->num(); i++) (*tab)[i]->describe();
return 0;
}
for (i=1; i<argc; i++) {
command_entry *c = getcmd(tab, argv[i]);
if (c == HELP) {
printf("Print help information\n");
}
else if (c == AMBIGUOUS) {
printf("?Ambiguous help command %s\n", argv[i]);
}
else if (c == NULL) {
printf("?Invalid help command %s\n", argv[i]);
}
else {
c->gethelp();
}
}
return 0;
}
static char *rcname = 0;
static char rcbuf[128];
void cmdrc(const char *m1, const char *m2) {
FILE *rcfile;
int gotmachine = 0;
int l1 = strlen(m1);
int l2 = strlen(m2);
char m1save[64];
if (skiprc) return;
strcpy(m1save, m1);
m1 = m1save;
if (rcname == 0) {
rcname = getenv("HOME");
if (rcname)
strcpy(rcbuf, rcname);
else
rcbuf[0] = '\0';
strcat(rcbuf, "/.telnetrc");
rcname = rcbuf;
}
rcfile = fopen(rcname, "r");
if (!rcfile) return;
while (fgets(line, sizeof(line), rcfile)) {
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;
process_command(&cmdtab, margc, margv);
}
fclose(rcfile);
}
#if defined(IP_OPTIONS) && defined(HAS_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.
*
* 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:
* 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.
*
* Return values:
*
* Returns the address of the host to connect to. 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.
*
*/
static unsigned long sourceroute(char *arg, char **cpp, int *lenp) {
static char lsr[44];
char *cp, *cp2, *lsrp, *lsrep;
struct in_addr sin_addr;
register struct hostent *host = 0;
register char c;
/*
* Verify the arguments, and make sure we have
* at least 7 bytes for the option.
*/
if (cpp == NULL || lenp == NULL)
return((unsigned long)-1);
if (*cpp != NULL && *lenp < 7)
return((unsigned long)-1);
/*
* Decide whether we have a buffer passed to us,
* or if we need to use our own static buffer.
*/
if (*cpp) {
lsrp = *cpp;
lsrep = lsrp + *lenp;
}
else {
*cpp = lsrp = lsr;
lsrep = lsrp + 44;
}
cp = arg;
/*
* 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((unsigned long)-1);
lsrp++; /* skip over length, we'll fill it in later */
*lsrp++ = 4;
cp++;
sin_addr.s_addr = 0;
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';
} else if (c == ':') {
*cp2++ = '\0';
} else
continue;
break;
}
if (!c)
cp2 = 0;
if (inet_aton(cp, &sin_addr)) ; /* nothing */
else if ((host = gethostbyname(cp))!=NULL) {
if (host->h_length > (int)sizeof(sin_addr)) {
host->h_length = sizeof(sin_addr);
}
#if defined(h_addr)
memcpy(&sin_addr, host->h_addr_list[0], host->h_length);
#else
memcpy(&sin_addr, host->h_addr, host->h_length);
#endif
} else {
*cpp = cp;
return(0);
}
memcpy(lsrp, (char *)&sin_addr, 4);
lsrp += 4;
if (cp2)
cp = cp2;
else
break;
/*
* Check to make sure there is space for next address
*/
if (lsrp + 4 > lsrep)
return((unsigned long)-1);
}
if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
*cpp = 0;
*lenp = 0;
return((unsigned long)-1);
}
*lsrp++ = IPOPT_NOP; /* 32 bit word align it */
*lenp = lsrp - *cpp;
return(sin_addr.s_addr);
}
#endif
Radix cross Linux
The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines
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