#if 0
#ifndef lint
static const char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/un.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/telnet.h>
#include <arpa/inet.h>
#include "general.h"
#include "ring.h"
#include "externs.h"
#include "defines.h"
#include "types.h"
#include "misc.h"
#ifdef AUTHENTICATION
#include <libtelnet/auth.h>
#endif
#ifdef ENCRYPTION
#include <libtelnet/encrypt.h>
#endif
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
typedef int (*intrtn_t)(int, char **);
#ifdef AUTHENTICATION
extern int auth_togdebug(int);
#endif
#ifdef ENCRYPTION
extern int EncryptAutoEnc(int);
extern int EncryptAutoDec(int);
extern int EncryptDebug(int);
extern int EncryptVerbose(int);
#endif
#if defined(IPPROTO_IP) && defined(IP_TOS)
int tos = -1;
#endif
char *hostname;
static char _hostname[MAXHOSTNAMELEN];
static int help(int, char **);
static int call(intrtn_t, ...);
static void cmdrc(char *, char *);
#ifdef INET6
static int switch_af(struct addrinfo **);
#endif
static int togglehelp(void);
static int send_tncmd(void (*)(int, int), const char *, char *);
static int setmod(int);
static int clearmode(int);
static int modehelp(void);
static int sourceroute(struct addrinfo *, char *, unsigned char **, int *, int *, int *);
typedef struct {
const char *name;
const char *help;
int (*handler)(int, char **);
int needconnect;
} Command;
static char line[256];
static char saveline[256];
static int margc;
static char *margv[20];
#ifdef OPIE
#include <sys/wait.h>
#define PATH_OPIEKEY "/usr/bin/opiekey"
static int
opie_calc(int argc, char *argv[])
{
int status;
if(argc != 3) {
printf("%s sequence challenge\n", argv[0]);
return (0);
}
switch(fork()) {
case 0:
execv(PATH_OPIEKEY, argv);
exit (1);
case -1:
perror("fork");
break;
default:
(void) wait(&status);
if (WIFEXITED(status))
return (WEXITSTATUS(status));
}
return (0);
}
#endif
static void
makeargv(void)
{
char *cp, *cp2, c;
char **argp = margv;
margc = 0;
cp = line;
if (*cp == '!') {
strcpy(saveline, line);
*argp++ = strdup("!");
margc++;
cp++;
}
while ((c = *cp)) {
int inquote = 0;
while (isspace(c))
c = *++cp;
if (c == '\0')
break;
*argp++ = cp;
margc += 1;
for (cp2 = cp; c != '\0'; c = *++cp) {
if (inquote) {
if (c == inquote) {
inquote = 0;
continue;
}
} else {
if (c == '\\') {
if ((c = *++cp) == '\0')
break;
} else if (c == '"') {
inquote = '"';
continue;
} else if (c == '\'') {
inquote = '\'';
continue;
} else if (isspace(c))
break;
}
*cp2++ = c;
}
*cp2 = '\0';
if (c == '\0')
break;
cp++;
}
*argp++ = 0;
}
static int
special(char *s)
{
char c;
char b;
switch (*s) {
case '^':
b = *++s;
if (b == '?') {
c = b | 0x40;
} else {
c = b & 0x1f;
}
break;
default:
c = *s;
break;
}
return c;
}
static const char *
control(cc_t c)
{
static char buf[5];
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);
}
struct sendlist {
const char *name;
const char *help;
int needconnect;
int narg;
int (*handler)(char *, ...);
int nbyte;
int what;
};
static int
send_esc(void),
send_help(void),
send_docmd(char *),
send_dontcmd(char *),
send_willcmd(char *),
send_wontcmd(char *);
static struct sendlist Sendlist[] = {
{ "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
{ "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
{ "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
{ "break", NULL, 1, 0, NULL, 2, BREAK },
{ "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
{ "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
{ "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
{ "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
{ "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
{ "intp", NULL, 1, 0, NULL, 2, IP },
{ "interrupt", NULL, 1, 0, NULL, 2, IP },
{ "intr", NULL, 1, 0, NULL, 2, IP },
{ "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
{ "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
{ "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
{ "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
{ "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
{ "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
{ "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
{ "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
{ "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
{ "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
{ "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
{ "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
{ "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
{ NULL, NULL, 0, 0, NULL, 0, 0 }
};
#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
sizeof(struct sendlist)))
static int
sendcmd(int argc, char *argv[])
{
int count;
int i;
struct sendlist *s;
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;
}
count = 0;
for (i = 1; i < argc; i++) {
s = GETSEND(argv[i]);
if (s == 0) {
printf("Unknown send argument '%s'\n'send ?' for help.\n",
argv[i]);
return 0;
} else if (Ambiguous((void *)s)) {
printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
argv[i]);
return 0;
}
if (i + s->narg >= argc) {
fprintf(stderr,
"Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
return 0;
}
count += s->nbyte;
if ((void *)s->handler == (void *)send_help) {
send_help();
return 0;
}
i += s->narg;
needconnect += s->needconnect;
}
if (!connected && needconnect) {
printf("?Need to be connected first.\n");
printf("'send ?' for help\n");
return 0;
}
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;
}
count = 0;
for (i = 1; i < argc; i++) {
if ((s = GETSEND(argv[i])) == 0) {
fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
quit();
}
if (s->handler) {
count++;
success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
(s->narg > 1) ? argv[i+2] : 0);
i += s->narg;
} else {
NET2ADD(IAC, s->what);
printoption("SENT", IAC, s->what);
}
}
return (count == success);
}
static int
send_esc(void)
{
NETADD(escape);
return 1;
}
static int
send_docmd(char *name)
{
return(send_tncmd(send_do, "do", name));
}
static int
send_dontcmd(name)
char *name;
{
return(send_tncmd(send_dont, "dont", name));
}
static int
send_willcmd(char *name)
{
return(send_tncmd(send_will, "will", name));
}
static int
send_wontcmd(char *name)
{
return(send_tncmd(send_wont, "wont", name));
}
static int
send_tncmd(void (*func)(int, int), const char *cmd, char *name)
{
char **cpp;
extern char *telopts[];
int val = 0;
if (isprefix(name, "help") || isprefix(name, "?")) {
int col, len;
printf("usage: send %s <value|option>\n", cmd);
printf("\"value\" must be from 0 to 255\n");
printf("Valid options are:\n\t");
col = 8;
for (cpp = telopts; *cpp; cpp++) {
len = strlen(*cpp) + 3;
if (col + len > 65) {
printf("\n\t");
col = 8;
}
printf(" \"%s\"", *cpp);
col += len;
}
printf("\n");
return 0;
}
cpp = (char **)genget(name, telopts, sizeof(char *));
if (Ambiguous(cpp)) {
fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
name, cmd);
return 0;
}
if (cpp) {
val = cpp - telopts;
} else {
char *cp = name;
while (*cp >= '0' && *cp <= '9') {
val *= 10;
val += *cp - '0';
cp++;
}
if (*cp != 0) {
fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
name, cmd);
return 0;
} else if (val < 0 || val > 255) {
fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
name, cmd);
return 0;
}
}
if (!connected) {
printf("?Need to be connected first.\n");
return 0;
}
(*func)(val, 1);
return 1;
}
static int
send_help(void)
{
struct sendlist *s;
for (s = Sendlist; s->name; s++) {
if (s->help)
printf("%-15s %s\n", s->name, s->help);
}
return(0);
}
static int
lclchars(void)
{
donelclchars = 1;
return 1;
}
static int
togdebug(void)
{
#ifndef NOT43
if (net > 0 &&
(SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) {
perror("setsockopt (SO_DEBUG)");
}
#else
if (telnet_debug) {
if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
perror("setsockopt (SO_DEBUG)");
} else
printf("Cannot turn off socket debugging\n");
#endif
return 1;
}
static int
togcrlf(void)
{
if (crlf) {
printf("Will send carriage returns as telnet <CR><LF>.\n");
} else {
printf("Will send carriage returns as telnet <CR><NUL>.\n");
}
return 1;
}
int binmode;
static int
togbinary(int val)
{
donebinarytoggle = 1;
if (val >= 0) {
binmode = val;
} else {
if (my_want_state_is_will(TELOPT_BINARY) &&
my_want_state_is_do(TELOPT_BINARY)) {
binmode = 1;
} else if (my_want_state_is_wont(TELOPT_BINARY) &&
my_want_state_is_dont(TELOPT_BINARY)) {
binmode = 0;
}
val = binmode ? 0 : 1;
}
if (val == 1) {
if (my_want_state_is_will(TELOPT_BINARY) &&
my_want_state_is_do(TELOPT_BINARY)) {
printf("Already operating in binary mode with remote host.\n");
} else {
printf("Negotiating binary mode with remote host.\n");
tel_enter_binary(3);
}
} else {
if (my_want_state_is_wont(TELOPT_BINARY) &&
my_want_state_is_dont(TELOPT_BINARY)) {
printf("Already in network ascii mode with remote host.\n");
} else {
printf("Negotiating network ascii mode with remote host.\n");
tel_leave_binary(3);
}
}
return 1;
}
static int
togrbinary(int val)
{
donebinarytoggle = 1;
if (val == -1)
val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
if (val == 1) {
if (my_want_state_is_do(TELOPT_BINARY)) {
printf("Already receiving in binary mode.\n");
} else {
printf("Negotiating binary mode on input.\n");
tel_enter_binary(1);
}
} else {
if (my_want_state_is_dont(TELOPT_BINARY)) {
printf("Already receiving in network ascii mode.\n");
} else {
printf("Negotiating network ascii mode on input.\n");
tel_leave_binary(1);
}
}
return 1;
}
static int
togxbinary(int val)
{
donebinarytoggle = 1;
if (val == -1)
val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
if (val == 1) {
if (my_want_state_is_will(TELOPT_BINARY)) {
printf("Already transmitting in binary mode.\n");
} else {
printf("Negotiating binary mode on output.\n");
tel_enter_binary(2);
}
} else {
if (my_want_state_is_wont(TELOPT_BINARY)) {
printf("Already transmitting in network ascii mode.\n");
} else {
printf("Negotiating network ascii mode on output.\n");
tel_leave_binary(2);
}
}
return 1;
}
struct togglelist {
const char *name;
const char *help;
int (*handler)(int);
int *variable;
const char *actionexplanation;
};
static struct togglelist Togglelist[] = {
{ "autoflush",
"flushing of output when sending interrupt characters",
0,
&autoflush,
"flush output when sending interrupt characters" },
{ "autosynch",
"automatic sending of interrupt characters in urgent mode",
0,
&autosynch,
"send interrupt characters in urgent mode" },
#ifdef AUTHENTICATION
{ "autologin",
"automatic sending of login and/or authentication info",
0,
&autologin,
"send login name and/or authentication information" },
{ "authdebug",
"Toggle authentication debugging",
auth_togdebug,
0,
"print authentication debugging information" },
#endif
#ifdef ENCRYPTION
{ "autoencrypt",
"automatic encryption of data stream",
EncryptAutoEnc,
0,
"automatically encrypt output" },
{ "autodecrypt",
"automatic decryption of data stream",
EncryptAutoDec,
0,
"automatically decrypt input" },
{ "verbose_encrypt",
"Toggle verbose encryption output",
EncryptVerbose,
0,
"print verbose encryption output" },
{ "encdebug",
"Toggle encryption debugging",
EncryptDebug,
0,
"print encryption debugging information" },
#endif
{ "skiprc",
"don't read ~/.telnetrc file",
0,
&skiprc,
"skip reading of ~/.telnetrc file" },
{ "binary",
"sending and receiving of binary data",
togbinary,
0,
0 },
{ "inbinary",
"receiving of binary data",
togrbinary,
0,
0 },
{ "outbinary",
"sending of binary data",
togxbinary,
0,
0 },
{ "crlf",
"sending carriage returns as telnet <CR><LF>",
(int (*)(int))togcrlf,
&crlf,
0 },
{ "crmod",
"mapping of received carriage returns",
0,
&crmod,
"map carriage return on output" },
{ "localchars",
"local recognition of certain control characters",
(int (*)(int))lclchars,
&localchars,
"recognize certain control characters" },
{ " ", "", NULL, NULL, NULL },
{ "debug",
"debugging",
(int (*)(int))togdebug,
&telnet_debug,
"turn on socket level debugging" },
{ "netdata",
"printing of hexadecimal network data (debugging)",
0,
&netdata,
"print hexadecimal representation of network traffic" },
{ "prettydump",
"output of \"netdata\" to user readable format (debugging)",
0,
&prettydump,
"print user readable output for \"netdata\"" },
{ "options",
"viewing of options processing (debugging)",
0,
&showoptions,
"show option processing" },
{ "termdata",
"(debugging) toggle printing of hexadecimal terminal data",
0,
&termdata,
"print hexadecimal representation of terminal traffic" },
{ "?",
NULL,
(int (*)(int))togglehelp,
NULL,
NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ "help",
NULL,
(int (*)(int))togglehelp,
NULL,
NULL },
{ NULL, NULL, NULL, NULL, NULL }
};
static int
togglehelp(void)
{
struct togglelist *c;
for (c = Togglelist; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s toggle %s\n", c->name, c->help);
else
printf("\n");
}
}
printf("\n");
printf("%-15s %s\n", "?", "display help information");
return 0;
}
static void
settogglehelp(int set)
{
struct togglelist *c;
for (c = Togglelist; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
c->help);
else
printf("\n");
}
}
}
#define GETTOGGLE(name) (struct togglelist *) \
genget(name, (char **) Togglelist, sizeof(struct togglelist))
static int
toggle(int argc, char *argv[])
{
int retval = 1;
char *name;
struct togglelist *c;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'toggle' command. 'toggle ?' for help.\n");
return 0;
}
argc--;
argv++;
while (argc--) {
name = *argv++;
c = GETTOGGLE(name);
if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
name);
return 0;
} else if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
name);
return 0;
} else {
if (c->variable) {
*c->variable = !*c->variable;
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler) {
retval &= (*c->handler)(-1);
}
}
}
return retval;
}
#ifdef USE_TERMIO
struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
#endif
struct setlist {
const char *name;
const char *help;
void (*handler)(char *);
cc_t *charp;
};
static struct setlist Setlist[] = {
#ifdef KLUDGELINEMODE
{ "echo", "character to toggle local echoing on/off", NULL, &echoc },
#endif
{ "escape", "character to escape back to telnet command mode", NULL, &escape },
{ "rlogin", "rlogin escape character", 0, &rlogin },
{ "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
{ " ", "", NULL, NULL },
{ " ", "The following need 'localchars' to be toggled true", NULL, NULL },
{ "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
{ "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
{ "quit", "character to cause an Abort process", NULL, termQuitCharp },
{ "eof", "character to cause an EOF ", NULL, termEofCharp },
{ " ", "", NULL, NULL },
{ " ", "The following are for local editing in linemode", NULL, NULL },
{ "erase", "character to use to erase a character", NULL, termEraseCharp },
{ "kill", "character to use to erase a line", NULL, termKillCharp },
{ "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
{ "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
{ "reprint", "character to use for line reprint", NULL, termRprntCharp },
{ "worderase", "character to use to erase a word", NULL, termWerasCharp },
{ "start", "character to use for XON", NULL, termStartCharp },
{ "stop", "character to use for XOFF", NULL, termStopCharp },
{ "forw1", "alternate end of line character", NULL, termForw1Charp },
{ "forw2", "alternate end of line character", NULL, termForw2Charp },
{ "ayt", "alternate AYT character", NULL, termAytCharp },
{ "baudrate", "set remote baud rate", DoBaudRate, ComPortBaudRate },
{ NULL, NULL, NULL, NULL }
};
static struct setlist *
getset(char *name)
{
return (struct setlist *)
genget(name, (char **) Setlist, sizeof(struct setlist));
}
void
set_escape_char(char *s)
{
if (rlogin != _POSIX_VDISABLE) {
rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet rlogin escape character is '%s'.\n",
control(rlogin));
} else {
escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
printf("Telnet escape character is '%s'.\n", control(escape));
}
}
static int
setcmd(int argc, char *argv[])
{
int value;
struct setlist *ct;
struct togglelist *c;
if (argc < 2 || argc > 3) {
printf("Format is 'set Name Value'\n'set ?' for help.\n");
return 0;
}
if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
for (ct = Setlist; ct->name; ct++)
printf("%-15s %s\n", ct->name, ct->help);
printf("\n");
settogglehelp(1);
printf("%-15s %s\n", "?", "display help information");
return 0;
}
ct = getset(argv[1]);
if (ct == 0 || !(ct->name && ct->name[0] != ' ')) {
c = GETTOGGLE(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
argv[1]);
return 0;
} else if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
argv[1]);
return 0;
}
if (c->variable) {
if ((argc == 2) || (strcmp("on", argv[2]) == 0))
*c->variable = 1;
else if (strcmp("off", argv[2]) == 0)
*c->variable = 0;
else {
printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
return 0;
}
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler)
(*c->handler)(1);
} else if (argc != 3) {
printf("Format is 'set Name Value'\n'set ?' for help.\n");
return 0;
} else if (Ambiguous((void *)ct)) {
fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
argv[1]);
return 0;
} else if (ct->handler) {
(*ct->handler)(argv[2]);
printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
} else {
if (strcmp("off", argv[2])) {
value = special(argv[2]);
} else {
value = _POSIX_VDISABLE;
}
*(ct->charp) = (cc_t)value;
printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
}
slc_check();
return 1;
}
static int
unsetcmd(int argc, char *argv[])
{
struct setlist *ct;
struct togglelist *c;
char *name;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'unset' command. 'unset ?' for help.\n");
return 0;
}
if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
for (ct = Setlist; ct->name; ct++)
printf("%-15s %s\n", ct->name, ct->help);
printf("\n");
settogglehelp(0);
printf("%-15s %s\n", "?", "display help information");
return 0;
}
argc--;
argv++;
while (argc--) {
name = *argv++;
ct = getset(name);
if (ct == 0 || !(ct->name && ct->name[0] != ' ')) {
c = GETTOGGLE(name);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
name);
return 0;
} else if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
name);
return 0;
}
if (c->variable) {
*c->variable = 0;
if (c->actionexplanation) {
printf("%s %s.\n", *c->variable? "Will" : "Won't",
c->actionexplanation);
}
}
if (c->handler)
(*c->handler)(0);
} else if (Ambiguous((void *)ct)) {
fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
name);
return 0;
} else if (ct->handler) {
(*ct->handler)(0);
printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
} else {
*(ct->charp) = _POSIX_VDISABLE;
printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
}
}
return 1;
}
#ifdef KLUDGELINEMODE
extern int kludgelinemode;
static int
dokludgemode(void)
{
kludgelinemode = 1;
send_wont(TELOPT_LINEMODE, 1);
send_dont(TELOPT_SGA, 1);
send_dont(TELOPT_ECHO, 1);
return 1;
}
#endif
static int
dolinemode(void)
{
#ifdef KLUDGELINEMODE
if (kludgelinemode)
send_dont(TELOPT_SGA, 1);
#endif
send_will(TELOPT_LINEMODE, 1);
send_dont(TELOPT_ECHO, 1);
return 1;
}
static int
docharmode(void)
{
#ifdef KLUDGELINEMODE
if (kludgelinemode)
send_do(TELOPT_SGA, 1);
else
#endif
send_wont(TELOPT_LINEMODE, 1);
send_do(TELOPT_ECHO, 1);
return 1;
}
static int
dolmmode(int bit, int on)
{
unsigned char c;
extern int linemode;
if (my_want_state_is_wont(TELOPT_LINEMODE)) {
printf("?Need to have LINEMODE option enabled first.\n");
printf("'mode ?' for help.\n");
return 0;
}
if (on)
c = (linemode | bit);
else
c = (linemode & ~bit);
lm_mode(&c, 1, 1);
return 1;
}
static int
setmod(int bit)
{
return dolmmode(bit, 1);
}
static int
clearmode(int bit)
{
return dolmmode(bit, 0);
}
struct modelist {
const char *name;
const char *help;
int (*handler)(int);
int needconnect;
int arg1;
};
static struct modelist ModeList[] = {
{ "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
#ifdef KLUDGELINEMODE
{ "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
#endif
{ "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
#ifdef KLUDGELINEMODE
{ "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
#endif
{ "", "", NULL, 0, 0 },
{ "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
{ "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
{ "+isig", 0, setmod, 1, MODE_TRAPSIG },
{ "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
{ "edit", "Enable character editing", setmod, 1, MODE_EDIT },
{ "+edit", 0, setmod, 1, MODE_EDIT },
{ "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
{ "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
{ "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
{ "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
{ "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
{ "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
{ "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
{ "help", 0, (int (*)(int))modehelp, 0, 0 },
#ifdef KLUDGELINEMODE
{ "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
#endif
{ "", "", NULL, 0, 0 },
{ "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
{ NULL, NULL, NULL, 0, 0 },
};
static int
modehelp(void)
{
struct modelist *mt;
printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
for (mt = ModeList; mt->name; mt++) {
if (mt->help) {
if (*mt->help)
printf("%-15s %s\n", mt->name, mt->help);
else
printf("\n");
}
}
return 0;
}
#define GETMODECMD(name) (struct modelist *) \
genget(name, (char **) ModeList, sizeof(struct modelist))
static int
modecmd(int argc, char *argv[])
{
struct modelist *mt;
if (argc != 2) {
printf("'mode' command requires an argument\n");
printf("'mode ?' for help.\n");
} else if ((mt = GETMODECMD(argv[1])) == 0) {
fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
} else if (Ambiguous((void *)mt)) {
fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
} else if (mt->needconnect && !connected) {
printf("?Need to be connected first.\n");
printf("'mode ?' for help.\n");
} else if (mt->handler) {
return (*mt->handler)(mt->arg1);
}
return 0;
}
static int
display(int argc, char *argv[])
{
struct togglelist *tl;
struct setlist *sl;
#define dotog(tl) if (tl->variable && tl->actionexplanation) { \
if (*tl->variable) { \
printf("will"); \
} else { \
printf("won't"); \
} \
printf(" %s.\n", tl->actionexplanation); \
}
#define doset(sl) if (sl->name && *sl->name != ' ') { \
if (sl->handler == 0) \
printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
else \
printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
}
if (argc == 1) {
for (tl = Togglelist; tl->name; tl++) {
dotog(tl);
}
printf("\n");
for (sl = Setlist; sl->name; sl++) {
doset(sl);
}
} else {
int i;
for (i = 1; i < argc; i++) {
sl = getset(argv[i]);
tl = GETTOGGLE(argv[i]);
if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
printf("?Ambiguous argument '%s'.\n", argv[i]);
return 0;
} else if (!sl && !tl) {
printf("?Unknown argument '%s'.\n", argv[i]);
return 0;
} else {
if (tl) {
dotog(tl);
}
if (sl) {
doset(sl);
}
}
}
}
optionstatus();
#ifdef ENCRYPTION
EncryptStatus();
#endif
return 1;
#undef doset
#undef dotog
}
static int
setescape(int argc, char *argv[])
{
char *arg;
char buf[50];
printf(
"Deprecated usage - please use 'set escape%s%s' in the future.\n",
(argc > 2)? " ":"", (argc > 2)? argv[1]: "");
if (argc > 2)
arg = argv[1];
else {
printf("new escape character: ");
(void) fgets(buf, sizeof(buf), stdin);
arg = buf;
}
if (arg[0] != '\0')
escape = arg[0];
(void) fflush(stdout);
return 1;
}
static int
togcrmod(void)
{
crmod = !crmod;
printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
(void) fflush(stdout);
return 1;
}
static int
suspend(void)
{
#ifdef SIGTSTP
setcommandmode();
{
long oldrows, oldcols, newrows, newcols, err_;
err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
(void) kill(0, SIGTSTP);
if (TerminalWindowSize(&newrows, &newcols) && connected &&
(err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
sendnaws();
}
}
TerminalSaveState();
setconnmode(0);
#else
printf("Suspend is not supported. Try the '!' command instead\n");
#endif
return 1;
}
static int
shell(int argc, char *argv[] __unused)
{
long oldrows, oldcols, newrows, newcols, err_;
setcommandmode();
err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
switch(vfork()) {
case -1:
perror("Fork failed\n");
break;
case 0:
{
const char *shellp, *shellname;
shellp = getenv("SHELL");
if (shellp == NULL)
shellp = "/bin/sh";
if ((shellname = strrchr(shellp, '/')) == 0)
shellname = shellp;
else
shellname++;
if (argc > 1)
execl(shellp, shellname, "-c", &saveline[1], (char *)0);
else
execl(shellp, shellname, (char *)0);
perror("Execl");
_exit(1);
}
default:
(void)wait((int *)0);
if (TerminalWindowSize(&newrows, &newcols) && connected &&
(err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
sendnaws();
}
break;
}
return 1;
}
static int
bye(int argc, char *argv[])
{
extern int resettermname;
if (connected) {
(void) shutdown(net, 2);
printf("Connection closed.\n");
(void) NetClose(net);
connected = 0;
resettermname = 1;
#ifdef AUTHENTICATION
#ifdef ENCRYPTION
auth_encrypt_connect(connected);
#endif
#endif
tninit();
}
if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
longjmp(toplevel, 1);
}
return 1;
}
void
quit(void)
{
(void) call(bye, "bye", "fromquit", 0);
Exit(0);
}
static int
logout(void)
{
send_do(TELOPT_LOGOUT, 1);
(void) netflush();
return 1;
}
struct slclist {
const char *name;
const char *help;
void (*handler)(int);
int arg;
};
static void slc_help(void);
struct slclist SlcList[] = {
{ "export", "Use local special character definitions",
(void (*)(int))slc_mode_export, 0 },
{ "import", "Use remote special character definitions",
slc_mode_import, 1 },
{ "check", "Verify remote special character definitions",
slc_mode_import, 0 },
{ "help", NULL, (void (*)(int))slc_help, 0 },
{ "?", "Print help information", (void (*)(int))slc_help, 0 },
{ NULL, NULL, NULL, 0 },
};
static void
slc_help(void)
{
struct slclist *c;
for (c = SlcList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\n", c->name, c->help);
else
printf("\n");
}
}
}
static struct slclist *
getslc(char *name)
{
return (struct slclist *)
genget(name, (char **) SlcList, sizeof(struct slclist));
}
static int
slccmd(int argc, char *argv[])
{
struct slclist *c;
if (argc != 2) {
fprintf(stderr,
"Need an argument to 'slc' command. 'slc ?' for help.\n");
return 0;
}
c = getslc(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
argv[1]);
return 0;
}
if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
argv[1]);
return 0;
}
(*c->handler)(c->arg);
slcstate();
return 1;
}
struct envlist {
const char *name;
const char *help;
void (*handler)(unsigned char *, unsigned char *);
int narg;
};
extern struct env_lst *
env_define(const unsigned char *, unsigned char *);
extern void
env_undefine(unsigned char *),
env_export(const unsigned char *),
env_unexport(const unsigned char *),
env_send(unsigned char *),
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
env_varval(unsigned char *),
#endif
env_list(void);
static void
env_help(void);
struct envlist EnvList[] = {
{ "define", "Define an environment variable",
(void (*)(unsigned char *, unsigned char *))env_define, 2 },
{ "undefine", "Undefine an environment variable",
(void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
{ "export", "Mark an environment variable for automatic export",
(void (*)(unsigned char *, unsigned char *))env_export, 1 },
{ "unexport", "Don't mark an environment variable for automatic export",
(void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
{ "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
{ "list", "List the current environment variables",
(void (*)(unsigned char *, unsigned char *))env_list, 0 },
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
{ "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
(void (*)(unsigned char *, unsigned char *))env_varval, 1 },
#endif
{ "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
{ "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
{ NULL, NULL, NULL, 0 },
};
static void
env_help(void)
{
struct envlist *c;
for (c = EnvList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\n", c->name, c->help);
else
printf("\n");
}
}
}
static struct envlist *
getenvcmd(char *name)
{
return (struct envlist *)
genget(name, (char **) EnvList, sizeof(struct envlist));
}
static int
env_cmd(int argc, char *argv[])
{
struct envlist *c;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'environ' command. 'environ ?' for help.\n");
return 0;
}
c = getenvcmd(argv[1]);
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
argv[1]);
return 0;
}
if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
argv[1]);
return 0;
}
if (c->narg + 2 != argc) {
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;
struct env_lst *prev;
unsigned char *var;
unsigned char *value;
int export;
int welldefined;
};
struct env_lst envlisthead;
static struct env_lst *
env_find(const unsigned char *var)
{
struct env_lst *ep;
for (ep = envlisthead.next; ep; ep = ep->next) {
if (strcmp(ep->var, var) == 0)
return(ep);
}
return(NULL);
}
void
env_init(void)
{
extern char **environ;
char **epp, *cp;
struct env_lst *ep;
for (epp = environ; *epp; epp++) {
if ((cp = strchr(*epp, '='))) {
*cp = '\0';
ep = env_define((unsigned char *)*epp,
(unsigned char *)cp+1);
ep->export = 0;
*cp = '=';
}
}
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, sizeof(hbuf));
hbuf[sizeof(hbuf)-1] = '\0';
asprintf(&cp, "%s%s", hbuf, cp2);
assert(cp != NULL);
free(ep->value);
ep->value = (unsigned char *)cp;
}
if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
env_define("USER", ep->value);
env_unexport("USER");
}
env_export("DISPLAY");
env_export("PRINTER");
}
struct env_lst *
env_define(const unsigned char *var, unsigned char *value)
{
struct env_lst *ep;
if ((ep = env_find(var))) {
if (ep->var)
free(ep->var);
if (ep->value)
free(ep->value);
} else {
ep = (struct env_lst *)malloc(sizeof(struct env_lst));
ep->next = envlisthead.next;
envlisthead.next = ep;
ep->prev = &envlisthead;
if (ep->next)
ep->next->prev = ep;
}
ep->welldefined = opt_welldefined(var);
ep->export = 1;
ep->var = strdup(var);
ep->value = strdup(value);
return(ep);
}
void
env_undefine(unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var))) {
ep->prev->next = ep->next;
if (ep->next)
ep->next->prev = ep->prev;
if (ep->var)
free(ep->var);
if (ep->value)
free(ep->value);
free(ep);
}
}
void
env_export(const unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var)))
ep->export = 1;
}
void
env_unexport(const unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var)))
ep->export = 0;
}
void
env_send(unsigned char *var)
{
struct env_lst *ep;
if (my_state_is_wont(TELOPT_NEW_ENVIRON)
#ifdef OLD_ENVIRON
&& my_state_is_wont(TELOPT_OLD_ENVIRON)
#endif
) {
fprintf(stderr,
"Cannot send '%s': Telnet ENVIRON option not enabled\n",
var);
return;
}
ep = env_find(var);
if (ep == 0) {
fprintf(stderr, "Cannot send '%s': variable not defined\n",
var);
return;
}
env_opt_start_info();
env_opt_add(ep->var);
env_opt_end(0);
}
void
env_list(void)
{
struct env_lst *ep;
for (ep = envlisthead.next; ep; ep = ep->next) {
printf("%c %-20s %s\n", ep->export ? '*' : ' ',
ep->var, ep->value);
}
}
unsigned char *
env_default(int init, int welldefined)
{
static struct env_lst *nep = NULL;
if (init) {
nep = &envlisthead;
return(NULL);
}
if (nep) {
while ((nep = nep->next)) {
if (nep->export && (nep->welldefined == welldefined))
return(nep->var);
}
}
return(NULL);
}
unsigned char *
env_getvalue(const unsigned char *var)
{
struct env_lst *ep;
if ((ep = env_find(var)))
return(ep->value);
return(NULL);
}
#if defined(OLD_ENVIRON) && defined(ENV_HACK)
void
env_varval(unsigned char *what)
{
extern int old_env_var, old_env_value, env_auto;
int len = strlen((char *)what);
if (len == 0)
goto unknown;
if (strncasecmp((char *)what, "status", len) == 0) {
if (env_auto)
printf("%s%s", "VAR and VALUE are/will be ",
"determined automatically\n");
if (old_env_var == OLD_ENV_VAR)
printf("VAR and VALUE set to correct definitions\n");
else
printf("VAR and VALUE definitions are reversed\n");
} else if (strncasecmp((char *)what, "auto", len) == 0) {
env_auto = 1;
old_env_var = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VAR;
} else if (strncasecmp((char *)what, "right", len) == 0) {
env_auto = 0;
old_env_var = OLD_ENV_VAR;
old_env_value = OLD_ENV_VALUE;
} else if (strncasecmp((char *)what, "wrong", len) == 0) {
env_auto = 0;
old_env_var = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VAR;
} else {
unknown:
printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
}
}
#endif
#ifdef AUTHENTICATION
struct authlist {
const char *name;
const char *help;
int (*handler)(char *);
int narg;
};
extern int
auth_enable(char *),
auth_disable(char *),
auth_status(void);
static int
auth_help(void);
struct authlist AuthList[] = {
{ "status", "Display current status of authentication information",
(int (*)(char *))auth_status, 0 },
{ "disable", "Disable an authentication type ('auth disable ?' for more)",
auth_disable, 1 },
{ "enable", "Enable an authentication type ('auth enable ?' for more)",
auth_enable, 1 },
{ "help", NULL, (int (*)(char *))auth_help, 0 },
{ "?", "Print help information", (int (*)(char *))auth_help, 0 },
{ NULL, NULL, NULL, 0 },
};
static int
auth_help(void)
{
struct authlist *c;
for (c = AuthList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\n", c->name, c->help);
else
printf("\n");
}
}
return 0;
}
int
auth_cmd(int argc, char *argv[])
{
struct authlist *c;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'auth' command. 'auth ?' for help.\n");
return 0;
}
c = (struct authlist *)
genget(argv[1], (char **) AuthList, sizeof(struct authlist));
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
argv[1]);
return 0;
}
if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
argv[1]);
return 0;
}
if (c->narg + 2 != argc) {
fprintf(stderr,
"Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
c->narg < argc + 2 ? "only " : "",
c->narg, c->narg == 1 ? "" : "s", c->name);
return 0;
}
return((*c->handler)(argv[2]));
}
#endif
#ifdef ENCRYPTION
struct encryptlist {
const char *name;
const char *help;
int (*handler)(char *, char *);
int needconnect;
int minarg;
int maxarg;
};
extern int
EncryptEnable(char *, char *),
EncryptDisable(char *, char *),
EncryptType(char *, char *),
EncryptStart(char *),
EncryptStartInput(void),
EncryptStartOutput(void),
EncryptStop(char *),
EncryptStopInput(void),
EncryptStopOutput(void),
EncryptStatus(void);
static int
EncryptHelp(void);
struct encryptlist EncryptList[] = {
{ "enable", "Enable encryption. ('encrypt enable ?' for more)",
EncryptEnable, 1, 1, 2 },
{ "disable", "Disable encryption. ('encrypt enable ?' for more)",
EncryptDisable, 0, 1, 2 },
{ "type", "Set encryption type. ('encrypt type ?' for more)",
EncryptType, 0, 1, 1 },
{ "start", "Start encryption. ('encrypt start ?' for more)",
(int (*)(char *, char *))EncryptStart, 1, 0, 1 },
{ "stop", "Stop encryption. ('encrypt stop ?' for more)",
(int (*)(char *, char *))EncryptStop, 1, 0, 1 },
{ "input", "Start encrypting the input stream",
(int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
{ "-input", "Stop encrypting the input stream",
(int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
{ "output", "Start encrypting the output stream",
(int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
{ "-output", "Stop encrypting the output stream",
(int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
{ "status", "Display current status of authentication information",
(int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
{ "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
{ "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
{ NULL, NULL, NULL, 0, 0, 0 },
};
static int
EncryptHelp(void)
{
struct encryptlist *c;
for (c = EncryptList; c->name; c++) {
if (c->help) {
if (*c->help)
printf("%-15s %s\n", c->name, c->help);
else
printf("\n");
}
}
return 0;
}
static int
encrypt_cmd(int argc, char *argv[])
{
struct encryptlist *c;
if (argc < 2) {
fprintf(stderr,
"Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
return 0;
}
c = (struct encryptlist *)
genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
if (c == 0) {
fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
argv[1]);
return 0;
}
if (Ambiguous((void *)c)) {
fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
argv[1]);
return 0;
}
argc -= 2;
if (argc < c->minarg || argc > c->maxarg) {
if (c->minarg == c->maxarg) {
fprintf(stderr, "Need %s%d argument%s ",
c->minarg < argc ? "only " : "", c->minarg,
c->minarg == 1 ? "" : "s");
} else {
fprintf(stderr, "Need %s%d-%d arguments ",
c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
}
fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
c->name);
return 0;
}
if (c->needconnect && !connected) {
if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
printf("?Need to be connected first.\n");
return 0;
}
}
return ((*c->handler)(argc > 0 ? argv[2] : 0,
argc > 1 ? argv[3] : 0));
}
#endif
static int
status(int argc, char *argv[])
{
if (connected) {
printf("Connected to %s.\n", hostname);
if ((argc < 2) || strcmp(argv[1], "notmuch")) {
int mode = getconnmode();
if (my_want_state_is_will(TELOPT_LINEMODE)) {
printf("Operating with LINEMODE option\n");
printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
printf("%s catching of signals\n",
(mode&MODE_TRAPSIG) ? "Local" : "No");
slcstate();
#ifdef KLUDGELINEMODE
} else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
printf("Operating in obsolete linemode\n");
#endif
} else {
printf("Operating in single character mode\n");
if (localchars)
printf("Catching signals locally\n");
}
printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
if (my_want_state_is_will(TELOPT_LFLOW))
printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
#ifdef ENCRYPTION
encrypt_display();
#endif
}
} else {
printf("No connection.\n");
}
printf("Escape character is '%s'.\n", control(escape));
(void) fflush(stdout);
return 1;
}
#ifdef SIGINFO
void
ayt_status(void)
{
(void) call(status, "status", "notmuch", 0);
}
#endif
static const char *
sockaddr_ntop(struct sockaddr *sa)
{
void *addr;
static char addrbuf[INET6_ADDRSTRLEN];
switch (sa->sa_family) {
case AF_INET:
addr = &((struct sockaddr_in *)sa)->sin_addr;
break;
case AF_UNIX:
addr = &((struct sockaddr_un *)sa)->sun_path;
break;
#ifdef INET6
case AF_INET6:
addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
break;
#endif
default:
return NULL;
}
inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
return addrbuf;
}
#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
static int
setpolicy(int lnet, struct addrinfo *res, char *policy)
{
char *buf;
int level;
int optname;
if (policy == NULL)
return 0;
buf = ipsec_set_policy(policy, strlen(policy));
if (buf == NULL) {
printf("%s\n", ipsec_strerror());
return -1;
}
level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
perror("setsockopt");
return -1;
}
free(buf);
return 0;
}
#endif
#ifdef INET6
static int
switch_af(struct addrinfo **aip)
{
int nextaf;
struct addrinfo *ai;
ai = *aip;
nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
do
ai=ai->ai_next;
while (ai != NULL && ai->ai_family != nextaf);
*aip = ai;
if (*aip != NULL) {
return 1;
}
return 0;
}
#endif
int
tn(int argc, char *argv[])
{
unsigned char *srp = 0;
int proto, opt;
int srlen;
int srcroute = 0, result;
char *cmd, *hostp = 0, *portp = 0, *user = 0;
char *src_addr = NULL;
struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
int error = 0, af_error = 0;
if (connected) {
printf("?Already connected to %s\n", hostname);
setuid(getuid());
return 0;
}
if (argc < 2) {
(void) strcpy(line, "open ");
printf("(to) ");
(void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
cmd = *argv;
--argc; ++argv;
while (argc) {
if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
goto usage;
if (strcmp(*argv, "-l") == 0) {
--argc; ++argv;
if (argc == 0)
goto usage;
user = *argv++;
--argc;
continue;
}
if (strcmp(*argv, "-a") == 0) {
--argc; ++argv;
autologin = 1;
continue;
}
if (strcmp(*argv, "-s") == 0) {
--argc; ++argv;
if (argc == 0)
goto usage;
src_addr = *argv++;
--argc;
continue;
}
if (hostp == 0) {
hostp = *argv++;
--argc;
continue;
}
if (portp == 0) {
portp = *argv++;
--argc;
continue;
}
usage:
printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
setuid(getuid());
return 0;
}
if (hostp == 0)
goto usage;
if (src_addr != NULL) {
memset(&hints, 0, sizeof(hints));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(src_addr, 0, &hints, &src_res);
if (error == EAI_NONAME) {
hints.ai_flags = 0;
error = getaddrinfo(src_addr, 0, &hints, &src_res);
}
if (error != 0) {
fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
if (error == EAI_SYSTEM)
fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
setuid(getuid());
return 0;
}
src_res0 = src_res;
}
if (hostp[0] == '/') {
struct sockaddr_un su;
if (strlen(hostp) >= sizeof(su.sun_path)) {
fprintf(stderr, "hostname too long for unix domain socket: %s",
hostp);
goto fail;
}
hostname = hostp;
memset(&su, 0, sizeof su);
su.sun_family = AF_UNIX;
strncpy(su.sun_path, hostp, sizeof su.sun_path);
printf("Trying %s...\n", hostp);
net = socket(PF_UNIX, SOCK_STREAM, 0);
if ( net < 0) {
perror("socket");
goto fail;
}
if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
perror(su.sun_path);
(void) NetClose(net);
goto fail;
}
goto af_unix;
} else if (hostp[0] == '@' || hostp[0] == '!') {
if (
#ifdef INET6
family == AF_INET6 ||
#endif
(hostname = strrchr(hostp, ':')) == NULL)
hostname = strrchr(hostp, '@');
if (hostname == NULL) {
hostname = hostp;
} else {
hostname++;
srcroute = 1;
}
} else
hostname = hostp;
if (!portp) {
telnetport = 1;
portp = strdup("telnet");
} else if (*portp == '-') {
portp++;
telnetport = 1;
} else if (*portp == '+') {
portp++;
telnetport = -1;
} else
telnetport = 0;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_NUMERICHOST;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(hostname, portp, &hints, &res);
if (error) {
hints.ai_flags = AI_CANONNAME;
error = getaddrinfo(hostname, portp, &hints, &res);
}
if (error != 0) {
fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
if (error == EAI_SYSTEM)
fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
setuid(getuid());
goto fail;
}
if (hints.ai_flags == AI_NUMERICHOST) {
int gni_err = 1;
if (doaddrlookup)
gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
_hostname, sizeof(_hostname) - 1, NULL, 0,
NI_NAMEREQD);
if (gni_err != 0)
(void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
_hostname[sizeof(_hostname)-1] = '\0';
hostname = _hostname;
} else {
if (srcroute != 0)
(void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
else if (res->ai_canonname != NULL)
strcpy(_hostname, res->ai_canonname);
else
(void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
_hostname[sizeof(_hostname)-1] = '\0';
hostname = _hostname;
}
res0 = res;
#ifdef INET6
af_again:
#endif
if (srcroute != 0) {
static char hostbuf[BUFSIZ];
if (af_error == 0) {
strncpy(hostbuf, hostp, BUFSIZ - 1);
hostbuf[BUFSIZ - 1] = '\0';
} else
hostp = hostbuf;
srp = 0;
result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
if (result == 0) {
#ifdef INET6
if (family == AF_UNSPEC && af_error == 0 &&
switch_af(&res) == 1) {
af_error = 1;
goto af_again;
}
#endif
setuid(getuid());
goto fail;
} else if (result == -1) {
printf("Bad source route option: %s\n", hostp);
setuid(getuid());
goto fail;
}
}
do {
printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
setuid(getuid());
if (net < 0) {
#ifdef INET6
if (family == AF_UNSPEC && af_error == 0 &&
switch_af(&res) == 1) {
af_error = 1;
goto af_again;
}
#endif
perror("telnet: socket");
goto fail;
}
if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
perror("setsockopt (source route)");
#if defined(IPPROTO_IP) && defined(IP_TOS)
if (res->ai_family == PF_INET) {
# if defined(HAS_GETTOS)
struct tosent *tp;
if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
tos = tp->t_tos;
# endif
if (tos < 0)
tos = IPTOS_LOWDELAY;
if (tos
&& (setsockopt(net, IPPROTO_IP, IP_TOS,
(char *)&tos, sizeof(int)) < 0)
&& (errno != ENOPROTOOPT))
perror("telnet: setsockopt (IP_TOS) (ignored)");
}
#endif
if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
perror("setsockopt (SO_DEBUG)");
}
if (src_addr != NULL) {
for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next)
if (src_res->ai_family == res->ai_family)
break;
if (src_res == NULL)
src_res = src_res0;
if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
#ifdef INET6
if (family == AF_UNSPEC && af_error == 0 &&
switch_af(&res) == 1) {
af_error = 1;
(void) NetClose(net);
goto af_again;
}
#endif
perror("bind");
(void) NetClose(net);
goto fail;
}
}
#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
if (setpolicy(net, res, ipsec_policy_in) < 0) {
(void) NetClose(net);
goto fail;
}
if (setpolicy(net, res, ipsec_policy_out) < 0) {
(void) NetClose(net);
goto fail;
}
#endif
if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
struct addrinfo *next;
next = res->ai_next;
if (af_error != 0)
while (next != NULL && next->ai_family != res->ai_family)
next = next->ai_next;
warn("connect to address %s", sockaddr_ntop(res->ai_addr));
if (next != NULL) {
res = next;
(void) NetClose(net);
continue;
}
warnx("Unable to connect to remote host");
(void) NetClose(net);
goto fail;
}
connected++;
#ifdef AUTHENTICATION
#ifdef ENCRYPTION
auth_encrypt_connect(connected);
#endif
#endif
} while (connected == 0);
freeaddrinfo(res0);
if (src_res0 != NULL)
freeaddrinfo(src_res0);
cmdrc(hostp, hostname);
af_unix:
connected = 1;
if (autologin && user == NULL) {
struct passwd *pw;
user = getenv("USER");
if (user == NULL ||
((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
if ((pw = getpwuid(getuid())))
user = pw->pw_name;
else
user = NULL;
}
}
if (user) {
env_define("USER", user);
env_export("USER");
}
(void) call(status, "status", "notmuch", 0);
telnet(user);
(void) NetClose(net);
ExitString("Connection closed by foreign host.\n",1);
fail:
if (res0 != NULL)
freeaddrinfo(res0);
if (src_res0 != NULL)
freeaddrinfo(src_res0);
return 0;
}
#define HELPINDENT (sizeof ("connect"))
static char
openhelp[] = "connect to a site",
closehelp[] = "close current connection",
logouthelp[] = "forcibly logout remote user and close the connection",
quithelp[] = "exit telnet",
statushelp[] = "print status information",
helphelp[] = "print help information",
sendhelp[] = "transmit special characters ('send ?' for more)",
sethelp[] = "set operating parameters ('set ?' for more)",
unsethelp[] = "unset operating parameters ('unset ?' for more)",
togglestring[] ="toggle operating parameters ('toggle ?' for more)",
slchelp[] = "change state of special charaters ('slc ?' for more)",
displayhelp[] = "display operating parameters",
#ifdef AUTHENTICATION
authhelp[] = "turn on (off) authentication ('auth ?' for more)",
#endif
#ifdef ENCRYPTION
encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
#endif
zhelp[] = "suspend telnet",
#ifdef OPIE
opiehelp[] = "compute response to OPIE challenge",
#endif
shellhelp[] = "invoke a subshell",
envhelp[] = "change environment variables ('environ ?' for more)",
modestring[] = "try to enter line or character mode ('mode ?' for more)";
static Command cmdtab[] = {
{ "close", closehelp, bye, 1 },
{ "logout", logouthelp, (int (*)(int, char **))logout, 1 },
{ "display", displayhelp, display, 0 },
{ "mode", modestring, modecmd, 0 },
{ "telnet", openhelp, tn, 0 },
{ "open", openhelp, tn, 0 },
{ "quit", quithelp, (int (*)(int, char **))quit, 0 },
{ "send", sendhelp, sendcmd, 0 },
{ "set", sethelp, setcmd, 0 },
{ "unset", unsethelp, unsetcmd, 0 },
{ "status", statushelp, status, 0 },
{ "toggle", togglestring, toggle, 0 },
{ "slc", slchelp, slccmd, 0 },
#ifdef AUTHENTICATION
{ "auth", authhelp, auth_cmd, 0 },
#endif
#ifdef ENCRYPTION
{ "encrypt", encrypthelp, encrypt_cmd, 0 },
#endif
{ "z", zhelp, (int (*)(int, char **))suspend, 0 },
{ "!", shellhelp, shell, 1 },
{ "environ", envhelp, env_cmd, 0 },
{ "?", helphelp, help, 0 },
#ifdef OPIE
{ "opie", opiehelp, opie_calc, 0 },
#endif
{ NULL, NULL, NULL, 0 }
};
static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
static char escapehelp[] = "deprecated command -- use 'set escape' instead";
static Command cmdtab2[] = {
{ "help", 0, help, 0 },
{ "escape", escapehelp, setescape, 0 },
{ "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
{ NULL, NULL, NULL, 0 }
};
static int
call(intrtn_t routine, ...)
{
va_list ap;
char *args[100];
int argno = 0;
va_start(ap, routine);
while ((args[argno++] = va_arg(ap, char *)) != 0);
va_end(ap);
return (*routine)(argno-1, args);
}
static Command *
getcmd(char *name)
{
Command *cm;
if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
return cm;
return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
}
void
command(int top, const char *tbuf, int cnt)
{
Command *c;
setcommandmode();
if (!top) {
putchar('\n');
} else {
(void) signal(SIGINT, SIG_DFL);
(void) signal(SIGQUIT, SIG_DFL);
}
for (;;) {
if (rlogin == _POSIX_VDISABLE)
printf("%s> ", prompt);
if (tbuf) {
char *cp;
cp = line;
while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
cnt--;
tbuf = 0;
if (cp == line || *--cp != '\n' || cp == line)
goto getline;
*cp = '\0';
if (rlogin == _POSIX_VDISABLE)
printf("%s\n", line);
} else {
getline:
if (rlogin != _POSIX_VDISABLE)
printf("%s> ", prompt);
if (fgets(line, sizeof(line), stdin) == NULL) {
if (feof(stdin) || ferror(stdin)) {
(void) quit();
}
break;
}
}
if (line[0] == 0)
break;
makeargv();
if (margv[0] == 0) {
break;
}
c = getcmd(margv[0]);
if (Ambiguous((void *)c)) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
if (c->needconnect && !connected) {
printf("?Need to be connected first.\n");
continue;
}
if ((*c->handler)(margc, margv)) {
break;
}
}
if (!top) {
if (!connected) {
longjmp(toplevel, 1);
}
setconnmode(0);
}
}
static int
help(int argc, char *argv[])
{
Command *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name; c++)
if (c->help) {
printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
c->help);
}
return 0;
}
else while (--argc > 0) {
char *arg;
arg = *++argv;
c = getcmd(arg);
if (Ambiguous((void *)c))
printf("?Ambiguous help command %s\n", arg);
else if (c == (Command *)0)
printf("?Invalid help command %s\n", arg);
else if (c->help)
printf("%s\n", c->help);
}
return 0;
}
static char *rcname = 0;
static char rcbuf[128];
void
cmdrc(char *m1, char *m2)
{
Command *c;
FILE *rcfile;
int gotmachine = 0;
int l1 = strlen(m1);
int l2 = strlen(m2);
char m1save[MAXHOSTNAMELEN];
if (skiprc)
return;
strlcpy(m1save, m1, sizeof(m1save));
m1 = m1save;
if (rcname == 0) {
rcname = getenv("HOME");
if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
strcpy(rcbuf, rcname);
else
rcbuf[0] = '\0';
strcat(rcbuf, "/.telnetrc");
rcname = rcbuf;
}
if ((rcfile = fopen(rcname, "r")) == 0) {
return;
}
for (;;) {
if (fgets(line, sizeof(line), rcfile) == NULL)
break;
if (line[0] == 0)
break;
if (line[0] == '#')
continue;
if (gotmachine) {
if (!isspace(line[0]))
gotmachine = 0;
}
if (gotmachine == 0) {
if (isspace(line[0]))
continue;
if (strncasecmp(line, m1, l1) == 0)
strncpy(line, &line[l1], sizeof(line) - l1);
else if (strncasecmp(line, m2, l2) == 0)
strncpy(line, &line[l2], sizeof(line) - l2);
else if (strncasecmp(line, "DEFAULT", 7) == 0)
strncpy(line, &line[7], sizeof(line) - 7);
else
continue;
if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
continue;
gotmachine = 1;
}
makeargv();
if (margv[0] == 0)
continue;
c = getcmd(margv[0]);
if (Ambiguous((void *)c)) {
printf("?Ambiguous command: %s\n", margv[0]);
continue;
}
if (c == 0) {
printf("?Invalid command: %s\n", margv[0]);
continue;
}
if (c->needconnect && !connected) {
printf("?Need to be connected first for %s.\n", margv[0]);
continue;
}
(*c->handler)(margc, margv);
}
fclose(rcfile);
}
static int
sourceroute(struct addrinfo *ai, char *arg, unsigned char **cpp, int *lenp, int *protop, int *optp)
{
static char buf[1024 + ALIGNBYTES];
unsigned char *cp, *cp2, *lsrp, *ep;
struct sockaddr_in *_sin;
#ifdef INET6
struct sockaddr_in6 *sin6;
struct ip6_rthdr *rth;
#endif
struct addrinfo hints, *res;
int error;
char c;
if (cpp == NULL || lenp == NULL)
return -1;
if (*cpp != NULL) {
switch (res->ai_family) {
case AF_INET:
if (*lenp < 7)
return -1;
break;
#ifdef INET6
case AF_INET6:
if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
sizeof(struct in6_addr)))
return -1;
break;
#endif
}
}
if (*cpp) {
lsrp = *cpp;
ep = lsrp + *lenp;
} else {
*cpp = lsrp = (char *)ALIGN(buf);
ep = lsrp + 1024;
}
cp = arg;
#ifdef INET6
if (ai->ai_family == AF_INET6) {
#ifndef __HAIKU__
if ((rth = inet6_rth_init((void *)*cpp, sizeof(buf),
IPV6_RTHDR_TYPE_0, 0)) == NULL)
return -1;
if (*cp != '@')
return -1;
*protop = IPPROTO_IPV6;
*optp = IPV6_RTHDR;
#else
return -1;
#endif
} else
#endif
{
if (*cp == '!') {
cp++;
*lsrp++ = IPOPT_SSRR;
} else
*lsrp++ = IPOPT_LSRR;
if (*cp != '@')
return -1;
lsrp++;
*lsrp++ = 4;
*protop = IPPROTO_IP;
*optp = IP_OPTIONS;
}
cp++;
memset(&hints, 0, sizeof(hints));
hints.ai_family = ai->ai_family;
hints.ai_socktype = SOCK_STREAM;
for (c = 0;;) {
if (
#ifdef INET6
ai->ai_family != AF_INET6 &&
#endif
c == ':')
cp2 = 0;
else for (cp2 = cp; (c = *cp2); cp2++) {
if (c == ',') {
*cp2++ = '\0';
if (*cp2 == '@')
cp2++;
} else if (c == '@') {
*cp2++ = '\0';
} else if (
#ifdef INET6
ai->ai_family != AF_INET6 &&
#endif
c == ':') {
*cp2++ = '\0';
} else
continue;
break;
}
if (!c)
cp2 = 0;
hints.ai_flags = AI_NUMERICHOST;
error = getaddrinfo(cp, NULL, &hints, &res);
if (error == EAI_NONAME) {
hints.ai_flags = 0;
error = getaddrinfo(cp, NULL, &hints, &res);
}
if (error != 0) {
fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
if (error == EAI_SYSTEM)
fprintf(stderr, "%s: %s\n", cp,
strerror(errno));
*cpp = cp;
return(0);
}
#ifdef INET6
if (res->ai_family == AF_INET6) {
#ifndef __HAIKU__
sin6 = (struct sockaddr_in6 *)res->ai_addr;
if (inet6_rth_add((void *)rth, &sin6->sin6_addr) == -1)
return(0);
#else
return(0);
#endif
} else
#endif
{
_sin = (struct sockaddr_in *)res->ai_addr;
memcpy(lsrp, (char *)&_sin->sin_addr, 4);
lsrp += 4;
}
if (cp2)
cp = cp2;
else
break;
if (lsrp + 4 > ep)
return -1;
freeaddrinfo(res);
}
#ifdef INET6
if (res->ai_family == AF_INET6) {
rth->ip6r_len = rth->ip6r_segleft * 2;
*lenp = (rth->ip6r_len + 1) << 3;
} else
#endif
{
if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
*cpp = 0;
*lenp = 0;
return -1;
}
*lsrp++ = IPOPT_NOP;
*lenp = lsrp - *cpp;
}
freeaddrinfo(res);
return 1;
}
