www.pudn.com > socks5.zip > 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. */
#ifdef SHOW_SCCIDS
static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95";
#endif
#include "config.h"
#ifdef HAVE_SYS_PARAM_H
#include
#endif
#ifdef HAVE_SYS_TYPES_H
#include
#endif
#ifdef HAVE_SYS_FILE_H
#include
#endif
#ifdef HAVE_UNISTD_H
#include
#endif
#include
#include
#ifdef HAVE_SYS_FCNTL_H
#include
#endif
#ifdef HAVE_FCNTL_H
#include
#endif
#include
#ifdef HAVE_STRING_H
#include
#endif
#ifdef HAVE_STRINGS_H
#include
#endif
#ifdef HAVE_UNISTD_H
#include
#endif
#ifdef HAVE_STDLIB_H
#include
#endif
#include
#include
#include
#include
#include
#include
#include "general.h"
#include "ring.h"
#include "externs.h"
#include "defines.h"
#include "types.h"
#ifdef HAVE_MACHINE_ENDIAN_H
#include
#endif
#include
#define DONT_NEED_SIGBLOCK
#define DONT_NEED_SIGUNBLOCK
#define DONT_NEED_SIGPAUSE
#define DONT_NEED_SIGPENDING
#include "sigfix.h"
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#if defined(IPPROTO_IP) && defined(IP_TOS)
int tos = -1;
#endif
char *hostname;
static char _hostname[MAXHOSTNAMELEN];
extern int isprefix();
extern char **genget();
extern int Ambiguous();
extern void herror();
static call();
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];
void cmdrc P((char *, char *));
static void makeargv() {
register char *cp, *cp2, c;
register 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)) {
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 char special(register char *s) {
register 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(register 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 {
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 P((void)),
send_help P((void)),
send_docmd P((char *)),
send_dontcmd P((char *)),
send_willcmd P((char *)),
send_wontcmd P((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)))
/*VARARGS*/
static int bye(int argc, char *argv[]) {
extern int resettermname;
if (connected) {
(void) shutdown(net, 2);
printf("Connection closed.\n");
(void) NetClose(net);
connected = 0;
resettermname = 1;
/* reset options */
tninit();
#ifdef TN3270
SetIn3270(); /* Get out of 3270 mode */
#endif /* defined(TN3270) */
}
if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
longjmp(toplevel, 1);
/* NOTREACHED */
}
return 1; /* Keep lint, etc., happy */
}
int quit() {
call(bye, "bye", "fromquit", 0);
Exit(0);
/*NOTREACHED*/
return 0;
}
int logout() {
send_do(TELOPT_LOGOUT, 1);
netflush();
return 1;
}
static int sendcmd(int argc, char **argv) {
int count; /* how many bytes we are going to need to send */
int i;
struct sendlist *s; /* pointer to current command */
int success = 0;
int needconnect = 0;
if (argc < 2) {
printf("need at least one argument for 'send' command\n");
printf("'send ?' for help\n");
return 0;
}
/* First, validate all the send arguments. In addition, we see how much */
/* space we are going to need, and whether or not we will be doing a */
/* "SYNCH" operation (which flushes the network queue). */
count = 0;
for (i = 1; i < argc; i++) {
s = GETSEND(argv[i]);
if (s == 0) {
printf("Unknown send argument '%s'\n'send ?' for help.\n", argv[i]);
return 0;
} else if (Ambiguous(s)) {
printf("Ambiguous send argument '%s'\n'send ?' for help.\n", argv[i]);
return 0;
}
if (i + s->narg >= argc) {
fprintf(stderr, "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
return 0;
}
count += s->nbyte;
if (s->handler == send_help) {
send_help();
return 0;
}
i += s->narg;
needconnect += s->needconnect;
}
if (!connected && needconnect) {
printf("?Need to be connected first.\n");
printf("'send ?' for help\n");
return 0;
}
/* Now, do we have enough room? */
if (NETROOM() < count) {
printf("There is not enough room in the buffer TO the network\n");
printf("to process your request. Nothing will be done.\n");
printf("('send synch' will throw away most data in the network\n");
printf("buffer, if this might help.)\n");
return 0;
}
/* OK, they are all OK, now go through again and actually send */
count = 0;
for (i = 1; i < argc; i++) {
if ((s = GETSEND(argv[i])) == 0) {
fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
(void) 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() {
NETADD(escape);
return 1;
}
static int send_tncmd(void (*func)(), char *cmd, char *name) {
char **cpp;
extern char *telopts[];
register int val = 0;
if (isprefix(name, "help") || isprefix(name, "?")) {
register int col, len;
printf("Usage: send %s \n", cmd);
printf("\"value\" must be from 0 to 255\n");
printf("Valid options are:\n\t");
col = 8;
for (cpp = telopts; *cpp; cpp++) {
len = strlen(*cpp) + 3;
if (col + len > 65) {
printf("\n\t");
col = 8;
}
printf(" \"%s\"", *cpp);
col += len;
}
printf("\n");
return 0;
}
cpp = (char **)genget(name, telopts, sizeof(char *));
if (Ambiguous(cpp)) {
fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", name, cmd);
return 0;
}
if (cpp) {
val = cpp - telopts;
} else {
register char *cp = name;
while (*cp >= '0' && *cp <= '9') {
val *= 10;
val += *cp - '0';
cp++;
}
if (*cp != 0) {
fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", name, cmd);
return 0;
} else if (val < 0 || val > 255) {
fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", name, cmd);
return 0;
}
}
if (!connected) {
printf("?Need to be connected first.\n");
return 0;
}
(*func)(val, 1);
return 1;
}
static int send_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));
}
static int send_help() {
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() {
donelclchars = 1;
return 1;
}
static int togdebug() {
#ifdef NOT43
if (!debug) {
printf("Cannot turn off socket debugging\n");
return 1;
}
#endif
if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0) < 0)
perror("setsockopt (SO_DEBUG)");
return 1;
}
static int togcrlf() {
if (crlf) {
printf("Will send carriage returns as telnet .\n");
} else {
printf("Will send carriage returns as telnet .\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 togglehelp P((void));
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" },
{ "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 ",
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 */
#ifdef TN3270
{ "apitrace",
"(debugging) toggle tracing of API transactions",
0,
&apitrace,
"trace API transactions" },
{ "cursesdata",
"(debugging) toggle printing of hexadecimal curses data",
0,
&cursesdata,
"print hexadecimal representation of curses data" },
#endif
{ "debug",
"debugging",
togdebug,
&debug,
"turn on socket level debugging" },
{ "netdata",
"printing of hexadecimal network data (debugging)",
0,
&netdata,
"print hexadecimal representation of network traffic" },
{ "prettydump",
"output of \"netdata\" to user readable format (debugging)",
0,
&prettydump,
"print user readable output for \"netdata\"" },
{ "options",
"viewing of options processing (debugging)",
0,
&showoptions,
"show option processing" },
{ "termdata",
"(debugging) toggle printing of hexadecimal terminal data",
0,
&termdata,
"print hexadecimal representation of terminal traffic" },
{ "?",
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\n", c->name, c->help);
else printf("\n");
}
}
printf("\n");
printf("%-15s %s\n", "?", "display help information");
return 0;
}
static void settogglehelp(int set) {
struct togglelist *c;
for (c = Togglelist; c->name; c++) {
if (c->help) {
if (*c->help) printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", c->help);
else printf("\n");
}
}
}
#define GETTOGGLE(name) (struct togglelist *) genget(name, (char **) Togglelist, sizeof(struct togglelist))
static int toggle(int argc, char *argv[]) {
int retval = 1;
char *name;
struct togglelist *c;
if (argc < 2) {
fprintf(stderr, "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
return 0;
}
argc--;
argv++;
while (argc--) {
name = *argv++;
c = GETTOGGLE(name);
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", name);
return 0;
} else if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", name);
return 0;
} else {
if (c->variable) {
*c->variable = !*c->variable; /* invert it */
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't", c->actionexplanation);
}
}
if (c->handler) {
retval &= (*c->handler)(-1);
}
}
}
return retval;
}
/* The following perform the "set" command. */
#ifdef USE_TERMIO
struct termio new_tc = { 0 };
#endif
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, 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 },
{ " ", "" },
{ " ", "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 }
};
#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(char *name) {
return (struct setlist *)genget(name, (char **) Setlist, sizeof(struct setlist));
}
void set_escape_char(char *s) {
if (rlogin != _POSIX_VDISABLE) {
rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet rlogin escape character is '%s'.\n", control(rlogin));
} else {
escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet escape character is '%s'.\n", control(escape));
}
}
static int setcmd(int argc, char *argv[]) {
int value;
struct setlist *ct;
struct togglelist *c;
if (argc < 2 || argc > 3) {
printf("Format is 'set Name Value'\n'set ?' for help.\n");
return 0;
}
if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
for (ct = Setlist; ct->name; ct++) printf("%-15s %s\n", ct->name, ct->help);
printf("\n");
settogglehelp(1);
printf("%-15s %s\n", "?", "display help information");
return 0;
}
ct = getset(argv[1]);
if (ct == 0) {
c = GETTOGGLE(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", argv[1]);
return 0;
} else if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", argv[1]);
return 0;
}
if (c->variable) {
if ((argc == 2) || (strcmp("on", argv[2]) == 0))
*c->variable = 1;
else if (strcmp("off", argv[2]) == 0)
*c->variable = 0;
else {
printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
return 0;
}
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't", c->actionexplanation);
}
}
if (c->handler) (*c->handler)(1);
} else if (argc != 3) {
printf("Format is 'set Name Value'\n'set ?' for help.\n");
return 0;
} else if (Ambiguous(ct)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", argv[1]);
return 0;
} else if (ct->handler) {
(*ct->handler)(argv[2]);
printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
} else {
if (strcmp("off", argv[2])) {
value = special(argv[2]);
} else {
value = _POSIX_VDISABLE;
}
*(ct->charp) = (cc_t)value;
printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
}
slc_check();
return 1;
}
static int unsetcmd(int argc, char *argv[]) {
struct setlist *ct;
struct togglelist *c;
register char *name;
if (argc < 2) {
fprintf(stderr, "Need an argument to 'unset' command. 'unset ?' for help.\n");
return 0;
}
if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
for (ct = Setlist; ct->name; ct++) printf("%-15s %s\n", ct->name, ct->help);
printf("\n");
settogglehelp(0);
printf("%-15s %s\n", "?", "display help information");
return 0;
}
argc--;
argv++;
while (argc--) {
name = *argv++;
ct = getset(name);
if (ct == 0) {
c = GETTOGGLE(name);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", name);
return 0;
} else if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", name);
return 0;
}
if (c->variable) {
*c->variable = 0;
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't", c->actionexplanation);
}
}
if (c->handler) (*c->handler)(0);
} else if (Ambiguous(ct)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", name);
return 0;
} else if (ct->handler) {
(*ct->handler)(0);
printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
} else {
*(ct->charp) = _POSIX_VDISABLE;
printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
}
}
return 1;
}
/* The following are the data structures and routines for the 'mode' */
/* command. */
#ifdef KLUDGELINEMODE
extern int kludgelinemode;
static int dokludgemode() {
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;
extern int linemode;
if (my_want_state_is_wont(TELOPT_LINEMODE)) {
printf("?Need to have LINEMODE option enabled first.\n");
printf("'mode ?' for help.\n");
return 0;
}
if (on) c = (linemode | bit);
else c = (linemode & ~bit);
lm_mode(&c, 1, 1);
return 1;
}
static int tn_setmode(int bit) {
return dolmmode(bit, 1);
}
static int 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;
};
extern int modehelp();
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", NULL, tn_setmode, 1, MODE_TRAPSIG },
{ "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
{ "edit", "Enable character editing", tn_setmode, 1, MODE_EDIT },
{ "+edit", NULL, tn_setmode, 1, MODE_EDIT },
{ "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
{ "softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB },
{ "+softtabs", NULL, tn_setmode, 1, MODE_SOFT_TAB },
{ "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
{ "litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO },
{ "+litecho", NULL, tn_setmode, 1, MODE_LIT_ECHO },
{ "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
{ "help", NULL, modehelp, 0 },
#ifdef KLUDGELINEMODE
{ "kludgeline", 0, dokludgemode, 1 },
#endif
{ "", "", 0 },
{ "?", "Print help information", modehelp, 0 },
{ 0 },
};
int modehelp() {
struct modelist *mt;
printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
for (mt = ModeList; mt->name; mt++) {
if (mt->help) {
if (*mt->help) printf("%-15s %s\n", mt->name, mt->help);
else printf("\n");
}
}
return 0;
}
#define GETMODECMD(name) (struct modelist *) genget(name, (char **) ModeList, sizeof(struct modelist))
static int modecmd(int argc, char *argv[]) {
struct modelist *mt;
if (argc != 2) {
printf("'mode' command requires an argument\n");
printf("'mode ?' for help.\n");
} else if ((mt = GETMODECMD(argv[1])) == 0) {
fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
} else if (Ambiguous(mt)) {
fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
} else if (mt->needconnect && !connected) {
printf("?Need to be connected first.\n");
printf("'mode ?' for help.\n");
} else if (mt->handler) {
return (*mt->handler)(mt->arg1);
}
return 0;
}
/* The following data structures and routines implement the "display" */
/* command. */
static int display(int argc, char *argv[]) {
struct togglelist *tl;
struct setlist *sl;
#define dotog(tl) if (tl->variable && tl->actionexplanation) { \
if (*tl->variable) { \
printf("will"); \
} else { \
printf("won't"); \
} \
printf(" %s.\n", tl->actionexplanation); \
}
#define doset(sl) if (sl->name && *sl->name != ' ') { \
if (sl->handler == 0) \
printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
else \
printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
}
if (argc == 1) {
for (tl = Togglelist; tl->name; tl++) {
dotog(tl);
}
printf("\n");
for (sl = Setlist; sl->name; sl++) {
doset(sl);
}
} else {
int i;
for (i = 1; i < argc; i++) {
sl = getset(argv[i]);
tl = GETTOGGLE(argv[i]);
if (Ambiguous(sl) || Ambiguous(tl)) {
printf("?Ambiguous argument '%s'.\n", argv[i]);
return 0;
} else if (!sl && !tl) {
printf("?Unknown argument '%s'.\n", argv[i]);
return 0;
} else {
if (tl) {
dotog(tl);
}
if (sl) {
doset(sl);
}
}
}
}
/*@*/optionstatus();
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[]) {
register 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: ");
fgets(buf, sizeof(buf), stdin);
arg = buf;
}
if (arg[0] != '\0') escape = arg[0];
if (!In3270) {
printf("Escape character is '%s'.\n", control(escape));
}
fflush(stdout);
return 1;
}
static int togcrmod() {
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() {
#ifdef SIGTSTP
long oldrows, oldcols, newrows, newcols, err;
setcommandmode();
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\n");
#endif
return 1;
}
#ifndef TN3270
int shell(int argc, char *argv[]) {
long oldrows, oldcols, newrows, newcols, err;
setcommandmode();
err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
switch(vfork()) {
case -1:
perror("Fork failed\n");
break;
case 0:
{
/* Fire up the shell in the child. */
register 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], 0);
else execl(shellp, shellname, 0);
perror("Execl");
_exit(1);
}
default:
wait(NULL); /* Wait for the shell to complete */
if (TerminalWindowSize(&newrows, &newcols) && connected &&
(err || ((oldrows != newrows) || (oldcols != newcols)))) {
sendnaws();
}
break;
}
return 1;
}
#else
extern int shell();
#endif
/* The SLC command. */
struct slclist {
char *name;
char *help;
void (*handler)();
int arg;
};
static void slc_help();
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() {
struct slclist *c;
for (c = SlcList; c->name; c++) {
if (c->help) {
if (*c->help) printf("%-15s %s\n", c->name, c->help);
else printf("\n");
}
}
}
static struct slclist *getslc(char *name) {
return (struct slclist *) genget(name, (char **) SlcList, sizeof(struct slclist));
}
static int slccmd(int argc, char *argv[]) {
struct slclist *c;
if (argc != 2) {
fprintf(stderr, "Need an argument to 'slc' command. 'slc ?' for help.\n");
return 0;
}
c = getslc(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", argv[1]);
return 0;
}
if (Ambiguous(c)) {
fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", argv[1]);
return 0;
}
(*c->handler)(c->arg);
slcstate();
return 1;
}
/* The ENVIRON command. */
struct envlist {
char *name;
char *help;
void (*handler)();
int narg;
};
extern struct env_lst *
env_define P((unsigned char *, unsigned char *));
extern void
env_undefine P((unsigned char *)),
env_export P((unsigned char *)),
env_unexport P((unsigned char *)),
env_send P((unsigned char *)),
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
env_varval P((unsigned char *)),
#endif
env_list P((void));
static void
env_help P((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 },
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
{ "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
env_varval, 1 },
#endif
{ "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\n", c->name, c->help);
else printf("\n");
}
}
}
static struct envlist *getenvcmd(char *name) {
return (struct envlist *)genget(name, (char **) EnvList, sizeof(struct envlist));
}
int env_cmd(int argc, char *argv[]) {
struct envlist *c;
if (argc < 2) {
fprintf(stderr, "Need an argument to 'environ' command. 'environ ?' for help.\n");
return 0;
}
c = getenvcmd(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", argv[1]);
return 0;
}
if (Ambiguous(c)) {
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;
}
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) {
register struct env_lst *ep;
for (ep = envlisthead.next; ep; ep = ep->next) {
if (strcmp((char *)ep->var, (char *)var) == 0)
return(ep);
}
return(NULL);
}
void env_init() {
extern char **environ;
register char **epp, *cp;
register 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("DISPLAY")) && ((*ep->value == ':') || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
char hbuf[256+1];
char *cp2 = strchr((char *)ep->value, ':');
gethostname(hbuf, 256);
hbuf[256] = '\0';
cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
sprintf((char *)cp, "%s%s", hbuf, cp2);
free(ep->value);
ep->value = (unsigned char *)cp;
}
/* If USER is not defined, but LOGNAME is, then add USER with the value */
/* from LOGNAME. By default, we don't export the USER variable. */
if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
env_define((unsigned char *)"USER", ep->value);
env_unexport((unsigned char *)"USER");
}
env_export((unsigned char *)"DISPLAY");
env_export((unsigned char *)"PRINTER");
}
struct env_lst *env_define(unsigned char *var, unsigned char *value) {
register 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) {
register 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) {
register struct env_lst *ep;
if ((ep = env_find(var))) ep->export = 1;
}
void env_unexport(unsigned char *var) {
register struct env_lst *ep;
if ((ep = env_find(var))) ep->export = 0;
}
void env_send(unsigned char *var) {
register struct env_lst *ep;
if (my_state_is_wont(TELOPT_NEW_ENVIRON)
#ifdef OLD_ENVIRON
&& my_state_is_wont(TELOPT_OLD_ENVIRON)
#endif
) {
fprintf(stderr, "Cannot send '%s': Telnet ENVIRON option not enabled\n", var);
return;
}
ep = env_find(var);
if (ep == 0) {
fprintf(stderr, "Cannot send '%s': variable not defined\n", var);
return;
}
env_opt_start_info();
env_opt_add(ep->var);
env_opt_end(0);
}
void env_list() {
register struct env_lst *ep;
for (ep = envlisthead.next; ep; ep = ep->next) {
printf("%c %-20s %s\n", ep->export ? '*' : ' ', ep->var, ep->value);
}
}
unsigned char *
env_default(init, welldefined)
int init, 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(var)
unsigned char *var;
{
register struct env_lst *ep;
if ((ep = env_find(var)))
return(ep->value);
return(NULL);
}
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
void
env_varval(what)
unsigned char *what;
{
extern int old_env_var, old_env_value, env_auto;
int len = strlen((char *)what);
if (len == 0)
goto unknown;
if (strncasecmp((char *)what, "status", len) == 0) {
if (env_auto)
printf("%s%s", "VAR and VALUE are/will be ",
"determined automatically\n");
if (old_env_var == OLD_ENV_VAR)
printf("VAR and VALUE set to correct definitions\n");
else
printf("VAR and VALUE definitions are reversed\n");
} else if (strncasecmp((char *)what, "auto", len) == 0) {
env_auto = 1;
old_env_var = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VAR;
} else if (strncasecmp((char *)what, "right", len) == 0) {
env_auto = 0;
old_env_var = OLD_ENV_VAR;
old_env_value = OLD_ENV_VALUE;
} else if (strncasecmp((char *)what, "wrong", len) == 0) {
env_auto = 0;
old_env_var = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VAR;
} else {
unknown:
printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
}
}
#endif
#ifdef TN3270
static void
filestuff(fd)
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;
}
#ifdef notdef
printf("\tFlags are 0x%x: %s\n", res, decodeflags(res));
#endif
}
#endif
/*
* Print status about the connection.
*/
/*ARGSUSED*/
static int
status(argc, argv)
int argc;
char *argv[];
{
if (connected) {
printf("Connected to %s.\n", hostname);
if ((argc < 2) || strcmp(argv[1], "notmuch")) {
int mode = getconnmode();
if (my_want_state_is_will(TELOPT_LINEMODE)) {
printf("Operating with LINEMODE option\n");
printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
printf("%s catching of signals\n",
(mode&MODE_TRAPSIG) ? "Local" : "No");
slcstate();
#ifdef KLUDGELINEMODE
} else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
printf("Operating in obsolete linemode\n");
#endif
} else {
printf("Operating in single character mode\n");
if (localchars)
printf("Catching signals locally\n");
}
printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
if (my_want_state_is_will(TELOPT_LFLOW))
printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
}
} else {
printf("No connection.\n");
}
#ifndef TN3270
printf("Escape character is '%s'.\n", control(escape));
(void) fflush(stdout);
# else /* !defined(TN3270) */
if ((!In3270) && ((argc < 2) || strcmp(argv[1], "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 /* defined(TN3270) */
return 1;
}
#ifdef SIGINFO
/*
* Function that gets called when SIGINFO is received.
*/
void
ayt_status()
{
(void) call(status, "status", "notmuch", 0);
}
#endif
int
tn(argc, argv)
int argc;
char *argv[];
{
register struct hostent *host = 0;
struct sockaddr_in sin;
struct servent *sp = 0;
unsigned int temp;
#if defined(IP_OPTIONS) && defined(IPPROTO_IP)
char *srp = 0;
unsigned int sourceroute(), srlen;
#endif
char *cmd, *hostp = 0, *portp = 0, *user = 0;
/* clear the socket address prior to use */
memset((char *)&sin, 0, sizeof(sin));
if (connected) {
printf("?Already connected to %s\n", hostname);
setuid(getuid());
return 0;
}
if (argc < 2) {
(void) strcpy(line, "open ");
printf("(to) ");
(void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
cmd = *argv;
--argc; ++argv;
while (argc) {
if (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) {
hostp = *argv++;
--argc;
continue;
}
if (portp == 0) {
portp = *argv++;
--argc;
continue;
}
usage:
printf("usage: %s [-l user] [-a] host-name [port]\n", cmd);
setuid(getuid());
return 0;
}
if (hostp == 0)
goto usage;
#if defined(IP_OPTIONS) && defined(IPPROTO_IP)
if (hostp[0] == '@' || hostp[0] == '!') {
if ((hostname = strrchr(hostp, ':')) == NULL)
hostname = strrchr(hostp, '@');
hostname++;
srp = 0;
temp = sourceroute(hostp, &srp, &srlen);
if (temp == 0) {
herror(srp);
setuid(getuid());
return 0;
} else if (temp == -1) {
printf("Bad source route option: %s\n", hostp);
setuid(getuid());
return 0;
} else {
sin.sin_addr.s_addr = temp;
sin.sin_family = AF_INET;
}
} else {
#endif
temp = (unsigned int)inet_addr(hostp);
if (temp != (unsigned int) -1) {
sin.sin_addr.s_addr = temp;
sin.sin_family = AF_INET;
(void) strcpy(_hostname, hostp);
hostname = _hostname;
} else {
host = gethostbyname(hostp);
if (host) {
sin.sin_family = host->h_addrtype;
#ifdef h_addr /* In 4.3, this is a #define */
memmove((caddr_t)&sin.sin_addr,
host->h_addr_list[0], host->h_length);
#else /* defined(h_addr) */
memmove((caddr_t)&sin.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);
setuid(getuid());
return 0;
}
}
#if defined(IP_OPTIONS) && defined(IPPROTO_IP)
}
#endif
if (portp) {
if (*portp == '-') {
portp++;
telnetport = 1;
} else
telnetport = 0;
sin.sin_port = atoi(portp);
if (sin.sin_port == 0) {
sp = getservbyname(portp, "tcp");
if (sp)
sin.sin_port = sp->s_port;
else {
printf("%s: bad port number\n", portp);
setuid(getuid());
return 0;
}
} else {
sin.sin_port = htons(sin.sin_port);
}
} else {
if (sp == 0) {
sp = getservbyname("telnet", "tcp");
if (sp == 0) {
fprintf(stderr, "telnet: tcp/telnet: unknown service\n");
setuid(getuid());
return 0;
}
sin.sin_port = sp->s_port;
}
telnetport = 1;
}
printf("Trying %s...\n", inet_ntoa(sin.sin_addr));
do {
net = socket(AF_INET, SOCK_STREAM, 0);
setuid(getuid());
if (net < 0) {
perror("telnet: socket");
return 0;
}
#if defined(IP_OPTIONS) && defined(IPPROTO_IP)
if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0)
perror("setsockopt (IP_OPTIONS)");
#endif
#if defined(IPPROTO_IP) && defined(IP_TOS)
{
#ifdef HAS_GETTOS
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,
(char *)&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, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
#ifdef h_addr /* In 4.3, this is a #define */
if (host && host->h_addr_list[1]) {
int oerrno = errno;
fprintf(stderr, "telnet: connect to address %s: ",
inet_ntoa(sin.sin_addr));
errno = oerrno;
perror((char *)0);
host->h_addr_list++;
memmove((caddr_t)&sin.sin_addr,
host->h_addr_list[0], host->h_length);
NetClose(net);
continue;
}
#endif /* defined(h_addr) */
perror("telnet: Unable to connect to remote host");
return 0;
}
connected++;
} while (connected == 0);
cmdrc(hostp, hostname);
if (autologin && user == NULL) {
struct passwd *pw;
user = getenv("USER");
if (user == NULL ||
(((pw = getpwnam(user))) && pw->pw_uid != getuid())) {
if ((pw = getpwuid(getuid())))
user = pw->pw_name;
else
user = NULL;
}
}
if (user) {
env_define((unsigned char *)"USER", (unsigned char *)user);
env_export((unsigned char *)"USER");
}
(void) call(status, "status", "notmuch", 0);
if (setjmp(peerdied) == 0)
telnet(user);
NetClose(net);
ExitString("Connection closed by foreign host.\n",1);
/*NOTREACHED*/
return 0;
}
#define HELPINDENT (sizeof ("connect"))
static char
openhelp[] = "connect to a site",
closehelp[] = "close current connection",
logouthelp[] = "forcibly logout remote user and close the connection",
quithelp[] = "exit telnet",
statushelp[] = "print status information",
helphelp[] = "print help information",
sendhelp[] = "transmit special characters ('send ?' for more)",
sethelp[] = "set operating parameters ('set ?' for more)",
unsethelp[] = "unset operating parameters ('unset ?' for more)",
togglestring[] ="toggle operating parameters ('toggle ?' for more)",
slchelp[] = "change state of special charaters ('slc ?' for more)",
displayhelp[] = "display operating parameters",
#ifdef TN3270
transcomhelp[] = "specify Unix command for transparent mode pipe",
#endif /* defined(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 int help();
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 },
#ifdef TN3270
{ "transcom", transcomhelp, settranscom, 0 },
#endif /* defined(TN3270) */
{ "z", zhelp, suspend, 0 },
#ifdef TN3270
{ "!", shellhelp, shell, 1 },
#else
{ "!", shellhelp, shell, 0 },
#endif
{ "environ", envhelp, env_cmd, 0 },
{ "?", helphelp, help, 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 }
};
/*
* Call routine with argc, argv set from args (terminated by 0).
*/
/*VARARGS1*/
static int
call(va_alist)
va_dcl
{
va_list ap;
typedef int (*intrtn_t)();
intrtn_t routine;
char *args[100];
int argno = 0;
va_start(ap);
routine = (va_arg(ap, intrtn_t));
while ((args[argno++] = va_arg(ap, char *)) != 0) {
;
}
va_end(ap);
return (*routine)(argno-1, args);
}
static Command *
getcmd(name)
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(top, tbuf, cnt)
int top;
char *tbuf;
int cnt;
{
register 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) {
register char *cp;
cp = line;
while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
cnt--;
tbuf = 0;
if (cp == line || *--cp != '\n' || cp == line)
goto getline;
*cp = '\0';
if (rlogin == _POSIX_VDISABLE)
printf("%s\n", line);
} else {
getline:
if (rlogin != _POSIX_VDISABLE)
printf("%s> ", prompt);
if (fgets(line, sizeof(line), stdin) == NULL) {
if (feof(stdin) || ferror(stdin)) {
(void) quit();
/*NOTREACHED*/
}
break;
}
}
if (line[0] == 0)
break;
makeargv();
if (margv[0] == 0) {
break;
}
c = getcmd(margv[0]);
if (Ambiguous(c)) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
if (c->needconnect && !connected) {
printf("?Need to be connected first.\n");
continue;
}
if ((*c->handler)(margc, margv)) {
break;
}
}
if (!top) {
if (!connected) {
longjmp(toplevel, 1);
/*NOTREACHED*/
}
#ifdef TN3270
if (shell_active == 0) {
setconnmode(0);
}
#else /* defined(TN3270) */
setconnmode(0);
#endif /* defined(TN3270) */
}
}
/*
* Help command.
*/
static int
help(argc, argv)
int argc;
char *argv[];
{
register Command *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name; c++)
if (c->help) {
printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
}
return 0;
}
while (--argc > 0) {
register char *arg;
arg = *++argv;
c = getcmd(arg);
if (Ambiguous(c))
printf("?Ambiguous help command %s\n", arg);
else if (c == (Command *)0)
printf("?Invalid help command %s\n", arg);
else
printf("%s\n", c->help);
}
return 0;
}
static char *rcname = 0;
static char rcbuf[128];
void
cmdrc(m1, m2)
char *m1, *m2;
{
register Command *c;
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;
}
if ((rcfile = fopen(rcname, "r")) == 0) {
return;
}
for (;;) {
if (fgets(line, sizeof(line), rcfile) == NULL)
break;
if (line[0] == 0)
break;
if (line[0] == '#')
continue;
if (gotmachine) {
if (!isspace(line[0]))
gotmachine = 0;
}
if (gotmachine == 0) {
if (isspace(line[0]))
continue;
if (strncasecmp(line, m1, l1) == 0)
strncpy(line, &line[l1], sizeof(line) - l1);
else if (strncasecmp(line, m2, l2) == 0)
strncpy(line, &line[l2], sizeof(line) - l2);
else if (strncasecmp(line, "DEFAULT", 7) == 0)
strncpy(line, &line[7], sizeof(line) - 7);
else
continue;
if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
continue;
gotmachine = 1;
}
makeargv();
if (margv[0] == 0)
continue;
c = getcmd(margv[0]);
if (Ambiguous(c)) {
printf("?Ambiguous command: %s\n", margv[0]);
continue;
}
if (c == 0) {
printf("?Invalid command: %s\n", margv[0]);
continue;
}
/*
* This should never happen...
*/
if (c->needconnect && !connected) {
printf("?Need to be connected first for %s.\n", margv[0]);
continue;
}
(*c->handler)(margc, margv);
}
fclose(rcfile);
}
#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.
*
* 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.
*
*/
unsigned int
sourceroute(arg, cpp, lenp)
char *arg;
char **cpp;
int *lenp;
{
static char lsr[44];
#ifdef sysV88
static IOPTN ipopt;
#endif
char *cp, *cp2, *lsrp, *lsrep;
register int tmp;
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 int)-1);
if (*cpp != NULL && *lenp < 7)
return((unsigned int)-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.
*/
#ifndef sysV88
if (*cp == '!') {
cp++;
*lsrp++ = IPOPT_SSRR;
} else
*lsrp++ = IPOPT_LSRR;
#else
if (*cp == '!') {
cp++;
ipopt.io_type = IPOPT_SSRR;
} else
ipopt.io_type = IPOPT_LSRR;
#endif
if (*cp != '@')
return((unsigned int)-1);
#ifndef sysV88
lsrp++; /* skip over length, we'll fill it in later */
*lsrp++ = 4;
#endif
cp++;
sin_addr.s_addr = 0;
for (c = 0;;) {
if (c == ':')
cp2 = 0;
else for (cp2 = cp; (c = *cp2); 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 ((tmp = inet_addr(cp)) != -1) {
sin_addr.s_addr = tmp;
} else if ((host = gethostbyname(cp))) {
#ifdef h_addr
memmove((caddr_t)&sin_addr,
host->h_addr_list[0], host->h_length);
#else
memmove((caddr_t)&sin_addr, host->h_addr, host->h_length);
#endif
} else {
*cpp = cp;
return(0);
}
memmove(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 int)-1);
}
#ifndef sysV88
if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
*cpp = 0;
*lenp = 0;
return((unsigned int)-1);
}
*lsrp++ = IPOPT_NOP; /* 32 bit word align it */
*lenp = lsrp - *cpp;
#else
ipopt.io_len = lsrp - *cpp;
if (ipopt.io_len <= 5) { /* Is 3 better ? */
*cpp = 0;
*lenp = 0;
return((unsigned int)-1);
}
*lenp = sizeof(ipopt);
*cpp = (char *) &ipopt;
#endif
return(sin_addr.s_addr);
}
#endif