#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 Regents of the University of California.\n\
All rights reserved.\n";
#endif
#include "telnetd.h"
#include "pathnames.h"
#if defined(_SC_CRAY_SECURE_SYS)
#include <sys/sysv.h>
#include <libpty.h>
#include <sys/secdev.h>
int secflag;
char tty_dev[16];
struct secdev dv;
struct sysv sysv;
struct socket_security ss;
#endif
#if defined(AUTHENTICATION)
#include <libtelnet/auth.h>
int auth_level = 0;
#endif
#if defined(SecurID)
int require_SecurID = 0;
#endif
extern int utmp_len;
int registerd_host_only = 0;
#ifdef STREAMSPTY
# include <stropts.h>
# include <termio.h>
# include "/usr/include/sys/tty.h"
# include <sys/ptyvar.h>
char ptyibufbuf[BUFSIZ+4];
char *ptyibuf = ptyibufbuf+3;
char *ptyip = ptyibufbuf+3;
char ptyibuf2[BUFSIZ];
unsigned char ctlbuf[BUFSIZ];
struct strbuf strbufc, strbufd;
int readstream();
#else
char ptyibuf[BUFSIZ], *ptyip = ptyibuf;
char ptyibuf2[BUFSIZ];
#endif
int hostinfo = 1;
#ifdef CRAY
extern int newmap;
int lowpty = 0, highpty;
#endif
int debug = 0;
int keepalive = 1;
char *progname;
extern void usage (void);
main(argc, argv)
char *argv[];
{
struct sockaddr_in from;
int on = 1, fromlen;
register int ch;
extern char *optarg;
extern int optind;
#if defined(IPPROTO_IP) && defined(IP_TOS)
int tos = -1;
#endif
pfrontp = pbackp = ptyobuf;
netip = netibuf;
nfrontp = nbackp = netobuf;
#if defined(ENCRYPTION)
nclearto = 0;
#endif
progname = *argv;
#ifdef CRAY
highpty = getnpty();
#endif
while ((ch = getopt(argc, argv, "d:a:e:klhnr:u:UI:D:B:sS:a:X:")) != -1) {
switch(ch) {
#ifdef AUTHENTICATION
case 'a':
if (strcmp(optarg, "debug") == 0) {
extern int auth_debug_mode;
auth_debug_mode = 1;
} else if (strcasecmp(optarg, "none") == 0) {
auth_level = 0;
} else if (strcasecmp(optarg, "other") == 0) {
auth_level = AUTH_OTHER;
} else if (strcasecmp(optarg, "user") == 0) {
auth_level = AUTH_USER;
} else if (strcasecmp(optarg, "valid") == 0) {
auth_level = AUTH_VALID;
} else if (strcasecmp(optarg, "off") == 0) {
auth_level = -1;
} else {
fprintf(stderr,
"telnetd: unknown authorization level for -a\n");
}
break;
#endif
#ifdef BFTPDAEMON
case 'B':
bftpd++;
break;
#endif
case 'd':
if (strcmp(optarg, "ebug") == 0) {
debug++;
break;
}
usage();
break;
#ifdef DIAGNOSTICS
case 'D':
if (!strcmp(optarg, "report")) {
diagnostic |= TD_REPORT|TD_OPTIONS;
} else if (!strcmp(optarg, "exercise")) {
diagnostic |= TD_EXERCISE;
} else if (!strcmp(optarg, "netdata")) {
diagnostic |= TD_NETDATA;
} else if (!strcmp(optarg, "ptydata")) {
diagnostic |= TD_PTYDATA;
} else if (!strcmp(optarg, "options")) {
diagnostic |= TD_OPTIONS;
} else {
usage();
}
break;
#endif
#ifdef ENCRYPTION
case 'e':
if (strcmp(optarg, "debug") == 0) {
extern int encrypt_debug_mode;
encrypt_debug_mode = 1;
break;
}
usage();
break;
#endif
case 'h':
hostinfo = 0;
break;
#if defined(CRAY) && defined(NEWINIT)
case 'I':
{
extern char *gen_id;
gen_id = optarg;
break;
}
#endif
#ifdef LINEMODE
case 'l':
alwayslinemode = 1;
break;
#endif
case 'k':
#if defined(LINEMODE) && defined(KLUDGELINEMODE)
lmodetype = NO_AUTOKLUDGE;
#else
#endif
break;
case 'n':
keepalive = 0;
break;
#ifdef CRAY
case 'r':
{
char *strchr();
char *c;
c = strchr(optarg, '-');
if (c) {
*c++ = '\0';
highpty = atoi(c);
}
if (*optarg != '\0')
lowpty = atoi(optarg);
if ((lowpty > highpty) || (lowpty < 0) ||
(highpty > 32767)) {
usage();
}
break;
}
#endif
#ifdef SecurID
case 's':
require_SecurID = 1;
break;
#endif
case 'S':
#ifdef HAVE_GETTOSBYNAME
if ((tos = parsetos(optarg, "tcp")) < 0)
fprintf(stderr, "%s%s%s\n",
"telnetd: Bad TOS argument '", optarg,
"'; will try to use default TOS");
#else
fprintf(stderr, "%s%s\n", "TOS option unavailable; ",
"-S flag not supported\n");
#endif
break;
case 'u':
utmp_len = atoi(optarg);
break;
case 'U':
registerd_host_only = 1;
break;
#ifdef AUTHENTICATION
case 'X':
auth_disable_name(optarg);
break;
#endif
default:
fprintf(stderr, "telnetd: %s: unknown option\n", ch);
case '?':
usage();
}
}
argc -= optind;
argv += optind;
if (debug) {
int s, ns, foo;
struct servent *sp;
static struct sockaddr_in sin = { AF_INET };
if (argc > 1) {
usage();
} else if (argc == 1) {
if (sp = getservbyname(*argv, "tcp")) {
sin.sin_port = sp->s_port;
} else {
sin.sin_port = atoi(*argv);
if ((int)sin.sin_port <= 0) {
fprintf(stderr, "telnetd: %s: bad port #\n", *argv);
usage();
}
sin.sin_port = htons((u_short)sin.sin_port);
}
} else {
sp = getservbyname("ktelnet", "tcp");
if (sp == 0) {
fprintf(stderr, "telnetd: tcp/ktelnet: unknown service\n");
exit(1);
}
sin.sin_port = sp->s_port;
}
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
perror("telnetd: socket");;
exit(1);
}
(void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(char *)&on, sizeof(on));
if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("bind");
exit(1);
}
if (listen(s, 1) < 0) {
perror("listen");
exit(1);
}
foo = sizeof(sin);
ns = accept(s, (struct sockaddr *)&sin, &foo);
if (ns < 0) {
perror("accept");
exit(1);
}
(void) dup2(ns, 0);
(void) close(ns);
(void) close(s);
#ifdef convex
} else if (argc == 1) {
;
#endif
} else if (argc > 0) {
usage();
}
#if defined(_SC_CRAY_SECURE_SYS)
secflag = sysconf(_SC_CRAY_SECURE_SYS);
if (secflag) {
int sz = sizeof(ss);
memset((char *)&dv, 0, sizeof(dv));
if (getsysv(&sysv, sizeof(struct sysv)) != 0) {
perror("getsysv");
exit(1);
}
if (getsockopt(0, SOL_SOCKET, SO_SECURITY,
(char *)&ss, &sz) >= 0) {
dv.dv_actlvl = ss.ss_slevel;
dv.dv_actcmp = ss.ss_compart;
dv.dv_minlvl = ss.ss_minlvl;
dv.dv_maxlvl = ss.ss_maxlvl;
dv.dv_valcmp = ss.ss_maxcmp;
}
}
#endif
openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON);
fromlen = sizeof (from);
if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
fprintf(stderr, "%s: ", progname);
perror("getpeername");
_exit(1);
}
if (keepalive &&
setsockopt(0, SOL_SOCKET, SO_KEEPALIVE,
(char *)&on, sizeof (on)) < 0) {
syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
}
#if defined(IPPROTO_IP) && defined(IP_TOS)
{
# if defined(HAVE_GETTOSBYNAME)
struct tosent *tp;
if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
tos = tp->t_tos;
# endif
if (tos < 0)
tos = 020;
if (tos
&& (setsockopt(0, IPPROTO_IP, IP_TOS,
(char *)&tos, sizeof(tos)) < 0)
&& (errno != ENOPROTOOPT) )
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
}
#endif
net = 0;
doit(&from);
}
void
usage()
{
fprintf(stderr, "Usage: telnetd");
#ifdef AUTHENTICATION
fprintf(stderr, " [-a (debug|other|user|valid|off)]\n\t");
#endif
#ifdef BFTPDAEMON
fprintf(stderr, " [-B]");
#endif
fprintf(stderr, " [-debug]");
#ifdef DIAGNOSTICS
fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t");
#endif
#ifdef AUTHENTICATION
fprintf(stderr, " [-edebug]");
#endif
fprintf(stderr, " [-h]");
#if defined(CRAY) && defined(NEWINIT)
fprintf(stderr, " [-Iinitid]");
#endif
#ifdef LINEMODE
fprintf(stderr, " [-l]");
#endif
fprintf(stderr, " [-n]");
#ifdef CRAY
fprintf(stderr, " [-r[lowpty]-[highpty]]");
#endif
#ifdef SecurID
fprintf(stderr, " [-s]");
#endif
#ifdef AUTHENTICATION
fprintf(stderr, " [-X auth-type]");
#endif
fprintf(stderr, " [-u utmp_hostname_length] [-U]");
fprintf(stderr, " [port]\n");
exit(1);
}
static char ttytype_sbbuf[] = { IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE };
int
getterminaltype(name)
char *name;
{
int retval = -1;
void _gettermname();
settimer(baseline);
#if defined(AUTHENTICATION)
send_do(TELOPT_AUTHENTICATION, 1);
while (his_will_wont_is_changing(TELOPT_AUTHENTICATION))
ttloop();
if (his_state_is_will(TELOPT_AUTHENTICATION)) {
retval = auth_wait(name);
}
#endif
#if defined(ENCRYPTION)
send_will(TELOPT_ENCRYPT, 1);
#endif
send_do(TELOPT_TTYPE, 1);
send_do(TELOPT_TSPEED, 1);
send_do(TELOPT_XDISPLOC, 1);
send_do(TELOPT_ENVIRON, 1);
while (
#if defined(ENCRYPTION)
his_do_dont_is_changing(TELOPT_ENCRYPT) ||
#endif
his_will_wont_is_changing(TELOPT_TTYPE) ||
his_will_wont_is_changing(TELOPT_TSPEED) ||
his_will_wont_is_changing(TELOPT_XDISPLOC) ||
his_will_wont_is_changing(TELOPT_ENVIRON)) {
ttloop();
}
#if defined(ENCRYPTION)
if (his_state_is_will(TELOPT_ENCRYPT)) {
encrypt_wait();
}
#endif
if (his_state_is_will(TELOPT_TSPEED)) {
static char sbbuf[] = { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE };
if(nfrontp - netobuf + sizeof(sbbuf) < sizeof(netobuf)) {
memcpy(nfrontp, sbbuf, sizeof(sbbuf));
nfrontp += sizeof(sbbuf);
}
}
if (his_state_is_will(TELOPT_XDISPLOC)) {
static char sbbuf[] = { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE };
if(nfrontp - netobuf + sizeof(sbbuf) < sizeof(netobuf)) {
memcpy(nfrontp, sbbuf, sizeof(sbbuf));
nfrontp += sizeof(sbbuf);
}
}
if (his_state_is_will(TELOPT_ENVIRON)) {
static char sbbuf[] = { IAC, SB, TELOPT_ENVIRON, TELQUAL_SEND, IAC, SE };
if(nfrontp - netobuf + sizeof(sbbuf) < sizeof(netobuf)) {
memcpy(nfrontp, sbbuf, sizeof(sbbuf));
nfrontp += sizeof(sbbuf);
}
}
if (his_state_is_will(TELOPT_TTYPE)) {
if(nfrontp - netobuf + sizeof(ttytype_sbbuf) < sizeof(netobuf)) {
memcpy(nfrontp, ttytype_sbbuf, sizeof(ttytype_sbbuf));
nfrontp += sizeof(ttytype_sbbuf);
}
}
if (his_state_is_will(TELOPT_TSPEED)) {
while (sequenceIs(tspeedsubopt, baseline))
ttloop();
}
if (his_state_is_will(TELOPT_XDISPLOC)) {
while (sequenceIs(xdisplocsubopt, baseline))
ttloop();
}
if (his_state_is_will(TELOPT_ENVIRON)) {
while (sequenceIs(environsubopt, baseline))
ttloop();
}
if (his_state_is_will(TELOPT_TTYPE)) {
char first[256], last[256];
while (sequenceIs(ttypesubopt, baseline))
ttloop();
if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) {
(void) strncpy(first, terminaltype, sizeof(first) - 1);
first[sizeof(first) - 1] = '\0';
for(;;) {
(void) strncpy(last, terminaltype, sizeof(last) - 1);
last[sizeof(last) - 1] = '\0';
_gettermname();
if (terminaltypeok(terminaltype))
break;
if ((strncmp(last, terminaltype, sizeof(last)) == 0) ||
his_state_is_wont(TELOPT_TTYPE)) {
if (strncmp(first, terminaltype, sizeof(first)) == 0)
break;
_gettermname();
if (strncmp(first, terminaltype, sizeof(first)) != 0)
(void) strncpy(terminaltype, first, sizeof(terminaltype) - 1);
terminaltype[sizeof(terminaltype) - 1] = '\0';
break;
}
}
}
}
return(retval);
}
void
_gettermname()
{
if (his_state_is_wont(TELOPT_TTYPE))
return;
settimer(baseline);
memcpy(nfrontp, ttytype_sbbuf, sizeof(ttytype_sbbuf));
nfrontp += sizeof(ttytype_sbbuf);
while (sequenceIs(ttypesubopt, baseline))
ttloop();
}
int
terminaltypeok(s)
char *s;
{
char buf[1024];
if (terminaltype == NULL)
return(1);
if (tgetent(buf, s) == 0)
return(0);
return(1);
}
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
char *hostname;
char host_name[MAXHOSTNAMELEN];
char remote_host_name[MAXHOSTNAMELEN];
#ifndef convex
extern void telnet (int, int);
#else
extern void telnet (int, int, char *);
#endif
doit(who)
struct sockaddr_in *who;
{
char *host, *inet_ntoa();
int t;
struct hostent *hp;
int level;
char user_name[256];
if ( (retval = pty_getpty(&pty, line, sizeof(line)) < 0 ) {
com_err(retval, "telnetd", "");
if (pty < 0)
fatal(net, "All network ports in use");
#if defined(_SC_CRAY_SECURE_SYS)
if (secflag) {
extern char *myline;
if (setdevs(myline, &dv) < 0)
fatal(net, "cannot set pty security");
}
#endif
hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
who->sin_family);
if (hp == NULL && registerd_host_only) {
fatal(net, "Couldn't resolve your address into a host name.\r\n\
Please contact your net administrator");
} else if (hp &&
(strlen(hp->h_name) <= ((utmp_len < 0) ? -utmp_len : utmp_len))) {
host = hp->h_name;
} else {
host = inet_ntoa(who->sin_addr);
}
strncpy(remote_host_name, host, sizeof(remote_host_name)-1);
remote_host_name[sizeof(remote_host_name)-1] = 0;
host = remote_host_name;
(void) gethostname(host_name, sizeof (host_name));
hostname = host_name;
#if defined(AUTHENTICATION) || defined(ENCRYPTION)
auth_encrypt_init(hostname, host, "TELNETD", 1);
#endif
init_env();
*user_name = 0;
level = getterminaltype(user_name);
setenv("TERM", terminaltype ? terminaltype : "network", 1);
startslave(host, level, user_name);
telnet(net, pty);
}
#if defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50)
int
Xterm_output(ibufp, obuf, icountp, ocount)
char **ibufp, *obuf;
int *icountp, ocount;
{
int ret;
ret = term_output(*ibufp, obuf, *icountp, ocount);
*ibufp += *icountp;
*icountp = 0;
return(ret);
}
#define term_output Xterm_output
#endif
void
#ifndef convex
telnet(f, p)
#else
telnet(f, p, host)
#endif
int f, p;
#ifdef convex
char *host;
#endif
{
int on = 1;
#define TABBUFSIZ 512
char defent[TABBUFSIZ];
char defstrs[TABBUFSIZ];
#undef TABBUFSIZ
char *HE;
char *HN;
char *IM;
void netflush();
get_slc_defaults();
if (my_state_is_wont(TELOPT_SGA))
send_will(TELOPT_SGA, 1);
send_do(TELOPT_ECHO, 1);
#ifdef LINEMODE
if (his_state_is_wont(TELOPT_LINEMODE)) {
linemode = 0;
editmode = 0;
send_do(TELOPT_LINEMODE, 1);
}
#endif
send_do(TELOPT_NAWS, 1);
send_will(TELOPT_STATUS, 1);
flowmode = 1;
restartany = -1;
send_do(TELOPT_LFLOW, 1);
while (his_will_wont_is_changing(TELOPT_NAWS))
ttloop();
if (his_want_state_is_will(TELOPT_ECHO) &&
his_state_is_will(TELOPT_NAWS)) {
while (his_will_wont_is_changing(TELOPT_ECHO))
ttloop();
}
if (his_want_state_is_will(TELOPT_ECHO)) {
DIAG(TD_OPTIONS,
{sprintf(nfrontp, "td: simulating recv\r\n");
nfrontp += strlen(nfrontp);});
willoption(TELOPT_ECHO);
}
if (my_state_is_wont(TELOPT_ECHO))
send_will(TELOPT_ECHO, 1);
#ifndef STREAMSPTY
(void) ioctl(p, TIOCPKT, (char *)&on);
#endif
#if defined(LINEMODE) && defined(KLUDGELINEMODE)
if (lmodetype < REAL_LINEMODE)
send_do(TELOPT_TM, 1);
#endif
telrcv();
(void) ioctl(f, FIONBIO, (char *)&on);
(void) ioctl(p, FIONBIO, (char *)&on);
#if defined(CRAY2) && defined(UNICOS5)
init_termdriver(f, p, interrupt, sendbrk);
#endif
#if defined(SO_OOBINLINE)
(void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE,
(char *)&on, sizeof(on));
#endif
#ifdef SIGTSTP
(void) signal(SIGTSTP, SIG_IGN);
#endif
#ifdef SIGTTOU
(void) signal(SIGTTOU, SIG_IGN);
#endif
(void) signal(SIGCHLD, cleanup);
#if defined(CRAY2) && defined(UNICOS5)
if ((int)signal(SIGUSR1, termstat) < 0)
perror("signal");
else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0)
perror("ioctl:TCSIGME");
termstat();
#endif
#ifdef TIOCNOTTY
{
register int t;
t = open(_PATH_TTY, O_RDWR);
if (t >= 0) {
(void) ioctl(t, TIOCNOTTY, (char *)0);
(void) close(t);
}
}
#endif
#if defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY)
(void) setsid();
ioctl(p, TIOCSCTTY, 0);
#endif
#if !defined(CRAY) || !defined(NEWINIT)
if (getenv("USER"))
hostinfo = 0;
#endif
if (getent(defent, "default") == 1) {
char *getstr();
char *cp=defstrs;
HE = getstr("he", &cp);
HN = getstr("hn", &cp);
IM = getstr("im", &cp);
if (HN && *HN) {
(void) strncpy(host_name, HN, sizeof(host_name) - 1);
host_name[sizeof(host_name) - 1] = '\0';
}
if (IM == 0)
IM = "";
} else {
IM = DEFAULT_IM;
HE = 0;
}
edithost(HE, host_name);
if (hostinfo && *IM)
putf(IM, ptyibuf2);
if (pcc)
(void) strncat(ptyibuf2, ptyip, pcc+1);
ptyip = ptyibuf2;
pcc = strlen(ptyip);
#ifdef LINEMODE
init_termbuf();
localstat();
#endif
DIAG(TD_REPORT,
{sprintf(nfrontp, "td: Entering processing loop\r\n");
nfrontp += strlen(nfrontp);});
#ifdef convex
startslave(host);
#endif
for (;;) {
fd_set ibits, obits, xbits;
register int c;
if (ncc < 0 && pcc < 0)
break;
#if defined(CRAY2) && defined(UNICOS5)
if (needtermstat)
_termstat();
#endif
FD_ZERO(&ibits);
FD_ZERO(&obits);
FD_ZERO(&xbits);
if (nfrontp - nbackp || pcc > 0) {
FD_SET(f, &obits);
} else {
FD_SET(p, &ibits);
}
if (pfrontp - pbackp || ncc > 0) {
FD_SET(p, &obits);
} else {
FD_SET(f, &ibits);
}
if (!SYNCHing) {
FD_SET(f, &xbits);
}
if ((c = select(16, &ibits, &obits, &xbits,
(struct timeval *)0)) < 1) {
if (c == -1) {
if (errno == EINTR) {
continue;
}
}
sleep(5);
continue;
}
if (FD_ISSET(net, &xbits)) {
SYNCHing = 1;
}
if (FD_ISSET(net, &ibits)) {
#if !defined(SO_OOBINLINE)
if (SYNCHing) {
int atmark;
(void) ioctl(net, SIOCATMARK, (char *)&atmark);
if (atmark) {
ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB);
if ((ncc == -1) && (errno == EINVAL)) {
ncc = read(net, netibuf, sizeof (netibuf));
if (sequenceIs(didnetreceive, gotDM)) {
SYNCHing = stilloob(net);
}
}
} else {
ncc = read(net, netibuf, sizeof (netibuf));
}
} else {
ncc = read(net, netibuf, sizeof (netibuf));
}
settimer(didnetreceive);
#else
ncc = read(net, netibuf, sizeof (netibuf));
#endif
if (ncc < 0 && errno == EWOULDBLOCK)
ncc = 0;
else {
if (ncc <= 0) {
break;
}
netip = netibuf;
}
DIAG((TD_REPORT | TD_NETDATA),
{sprintf(nfrontp, "td: netread %d chars\r\n", ncc);
nfrontp += strlen(nfrontp);});
DIAG(TD_NETDATA, printdata("nd", netip, ncc));
}
if (FD_ISSET(p, &ibits)) {
#ifndef STREAMSPTY
pcc = read(p, ptyibuf, BUFSIZ);
#else
pcc = readstream(p, ptyibuf, BUFSIZ);
#endif
if (pcc < 0 && (errno == EWOULDBLOCK ||
#ifdef EAGAIN
errno == EAGAIN ||
#endif
errno == EIO)) {
pcc = 0;
} else {
if (pcc <= 0)
break;
#if !defined(CRAY2) || !defined(UNICOS5)
#ifdef LINEMODE
if (ptyibuf[0] & TIOCPKT_IOCTL) {
copy_termbuf(ptyibuf+1, pcc-1);
localstat();
pcc = 1;
}
#endif
if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) {
netclear();
#ifndef NO_URGENT
*nfrontp++ = IAC;
*nfrontp++ = DM;
neturg = nfrontp-1;
#endif
}
if (his_state_is_will(TELOPT_LFLOW) &&
(ptyibuf[0] &
(TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) {
int newflow =
ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0;
if (newflow != flowmode) {
flowmode = newflow;
(void) sprintf(nfrontp,
"%c%c%c%c%c%c",
IAC, SB, TELOPT_LFLOW,
flowmode ? LFLOW_ON
: LFLOW_OFF,
IAC, SE);
nfrontp += 6;
}
}
pcc--;
ptyip = ptyibuf+1;
#else
if (!uselinemode) {
unpcc = pcc;
unptyip = ptyibuf;
pcc = term_output(&unptyip, ptyibuf2,
&unpcc, BUFSIZ);
ptyip = ptyibuf2;
} else
ptyip = ptyibuf;
#endif
}
}
while (pcc > 0) {
if ((&netobuf[BUFSIZ] - nfrontp) < 2)
break;
c = *ptyip++ & 0377, pcc--;
if (c == IAC)
*nfrontp++ = c;
#if defined(CRAY2) && defined(UNICOS5)
else if (c == '\n' &&
my_state_is_wont(TELOPT_BINARY) && newmap)
*nfrontp++ = '\r';
#endif
*nfrontp++ = c;
if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) {
if (pcc > 0 && ((*ptyip & 0377) == '\n')) {
*nfrontp++ = *ptyip++ & 0377;
pcc--;
} else
*nfrontp++ = '\0';
}
}
#if defined(CRAY2) && defined(UNICOS5)
if (!uselinemode && unpcc) {
pcc = unpcc;
unpcc = 0;
ptyip = unptyip;
}
#endif
if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0)
netflush();
if (ncc > 0)
telrcv();
if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0)
ptyflush();
}
cleanup(0);
}
#ifndef TCSIG
# ifdef TIOCSIG
# define TCSIG TIOCSIG
# endif
#endif
#ifdef STREAMSPTY
int flowison = -1;
int readstream(p, ibuf, bufsize)
int p;
char *ibuf;
int bufsize;
{
int flags = 0;
int ret = 0;
struct termios *tsp;
struct termio *tp;
struct iocblk *ip;
char vstop, vstart;
int ixon;
int newflow;
strbufc.maxlen = BUFSIZ;
strbufc.buf = ctlbuf;
strbufd.maxlen = bufsize-1;
strbufd.len = 0;
strbufd.buf = ibuf+1;
ibuf[0] = 0;
ret = getmsg(p, &strbufc, &strbufd, &flags);
if (ret < 0)
return(-1);
if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) {
if (strbufd.len > 0) {
return(strbufd.len + 1);
} else {
errno = EAGAIN;
return(-1);
}
}
switch (ctlbuf[0]) {
case M_FLUSH:
if (ibuf[1] & FLUSHW)
ibuf[0] = TIOCPKT_FLUSHWRITE;
return(1);
case M_IOCTL:
ip = (struct iocblk *) (ibuf+1);
switch (ip->ioc_cmd) {
case TCSETS:
case TCSETSW:
case TCSETSF:
tsp = (struct termios *)
(ibuf+1 + sizeof(struct iocblk));
vstop = tsp->c_cc[VSTOP];
vstart = tsp->c_cc[VSTART];
ixon = tsp->c_iflag & IXON;
break;
case TCSETA:
case TCSETAW:
case TCSETAF:
tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk));
vstop = tp->c_cc[VSTOP];
vstart = tp->c_cc[VSTART];
ixon = tp->c_iflag & IXON;
break;
default:
errno = EAGAIN;
return(-1);
}
newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0;
if (newflow != flowison) {
flowison = newflow;
ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP;
return(1);
}
}
errno = EAGAIN;
return(-1);
}
#endif
void
interrupt()
{
ptyflush();
#ifdef TCSIG
(void) ioctl(pty, TCSIG, (char *)SIGINT);
#else
init_termbuf();
*pfrontp++ = slctab[SLC_IP].sptr ?
(unsigned char)*slctab[SLC_IP].sptr : '\177';
#endif
}
void
sendbrk()
{
ptyflush();
#ifdef TCSIG
(void) ioctl(pty, TCSIG, (char *)SIGQUIT);
#else
init_termbuf();
*pfrontp++ = slctab[SLC_ABORT].sptr ?
(unsigned char)*slctab[SLC_ABORT].sptr : '\034';
#endif
}
void
sendsusp()
{
#ifdef SIGTSTP
ptyflush();
# ifdef TCSIG
(void) ioctl(pty, TCSIG, (char *)SIGTSTP);
# else
*pfrontp++ = slctab[SLC_SUSP].sptr ?
(unsigned char)*slctab[SLC_SUSP].sptr : '\032';
# endif
#endif
}
void
recv_ayt()
{
#if defined(SIGINFO) && defined(TCSIG)
if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) {
(void) ioctl(pty, TCSIG, (char *)SIGINFO);
return;
}
#endif
(void) strncpy(nfrontp, "\r\n[Yes]\r\n",
sizeof(netobuf) - 1 - (nfrontp - netobuf));
nfrontp += 9;
*nfrontp = '\0';
}
void
doeof()
{
init_termbuf();
#if defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN)
if (!tty_isediting()) {
extern char oldeofc;
*pfrontp++ = oldeofc;
return;
}
#endif
*pfrontp++ = slctab[SLC_EOF].sptr ?
(unsigned char)*slctab[SLC_EOF].sptr : '\004';
}