4.4BSD/usr/src/contrib/xns/examples/gap/gaptelnet.c
#ifndef lint
static char *rcsid = "$Header: gaptelnet.c,v 2.2 86/05/16 11:03:33 jqj Exp $";
#endif
/*
* XNS User telnet program.
*/
/* $Log: gaptelnet.c,v $
* Revision 2.2 86/05/16 11:03:33 jqj
* fix to correspond to new semantics for enumerations (global)
*
* Revision 2.1 86/03/01 09:26:04 jqj
* Accept data with datastream=0 for the sake of incorrectly implemented
* servers (e.g. InterLisp-D). If unrecognized inband controls arrive,
* don't choke.
*
* Revision 2.0 85/11/21 07:23:04 jqj
* 4.3BSD standard release
*
* Revision 1.3 85/11/20 14:00:08 jqj
* added symbolic entries for Gap connection types
*
* Revision 1.2 85/05/22 09:46:37 jqj
* VAX 4.3beta baseline version
*
* Revision 1.2 85/05/22 09:46:37 jqj
* Beta-test GAP telnet
*
* based on tcp/telnet:
* static char *rcsid = "$Header: gaptelnet.c,v 2.2 86/05/16 11:03:33 jqj Exp $";
* static char sccsid[] = "@(#)telnet.c 4.24 (Berkeley) 7/20/83";
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netns/ns.h>
#include <netns/idp.h>
#include <netns/sp.h> /* for spphdr */
#include <netns/spidp.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <xnscourier/Clearinghouse2.h>
#include "GAP3.h"
#include "gapcontrols.h"
#include <xnscourier/except.h>
#include <xnscourier/CH.h>
#define strip(x) ((x)&0177)
char ttyobuf[BUFSIZ], *tfrontp = ttyobuf, *tbackp = ttyobuf;
char netobuf[BUFSIZ], *nfrontp = netobuf, *nbackp = netobuf;
int connected;
CourierConnection *cconn;
int net;
FILE *logfile;
int debug = 0;
int crmod = 0;
char *prompt;
char escape = CTRL(]);
char on = 1;
char line[200];
int margc;
char *margv[20];
jmp_buf toplevel;
jmp_buf peerdied;
extern int errno;
int tn(), quit(), suspend(), bye(), help();
int setescape(), status(), toggle(), setoptions();
int setcrmod(), setdebug(), setlog();
#define HELPINDENT (sizeof ("connect"))
struct cmd {
char *name; /* command name */
char *help; /* help string */
int (*handler)(); /* routine which executes command */
};
char openhelp[] = "connect to a site";
char closehelp[] = "close current connection";
char quithelp[] = "exit telnet";
char zhelp[] = "suspend telnet";
char debughelp[] = "toggle debugging";
char escapehelp[] = "set escape character";
char statushelp[] = "print status information";
char helphelp[] = "print help information";
char crmodhelp[] = "toggle mapping of received carriage returns";
char loghelp[] = "toggle logging of session";
struct cmd cmdtab[] = {
{ "open", openhelp, tn },
{ "close", closehelp, bye },
{ "quit", quithelp, quit },
{ "z", zhelp, suspend },
{ "escape", escapehelp, setescape },
{ "status", statushelp, status },
/* { "crmod", crmodhelp, setcrmod }, */
{ "debug", debughelp, setdebug },
{ "log", loghelp, setlog },
{ "?", helphelp, help },
0
};
struct sockaddr_ns sin;
int intr(), deadpeer();
char *control();
struct cmd *getcmd();
struct tchars otc;
struct ltchars oltc;
struct sgttyb ottyb;
char *hostname;
char hnamebuf[45];
main(argc, argv)
int argc;
char *argv[];
{
ioctl(0, TIOCGETP, (char *)&ottyb);
ioctl(0, TIOCGETC, (char *)&otc);
ioctl(0, TIOCGLTC, (char *)&oltc);
setbuf(stdin, 0);
setbuf(stdout, 0);
prompt = argv[0];
if (argc > 1 && !strcmp(argv[1], "-d"))
debug = SO_DEBUG, argv++, argc--;
if (argc != 1) {
if (setjmp(toplevel) != 0)
exit(0);
tn(argc, argv);
}
setjmp(toplevel);
for (;;)
command(1);
}
tn(argc, argv)
int argc;
char *argv[];
{
register int c;
register struct ns_addr *host;
extern struct ns_addr *getXNSaddr();
Clearinghouse2_ObjectName hostoname, hdefault;
LongCardinal servicetype;
if (connected) {
printf("?Already connected to %s\n", hostname);
return;
}
if (argc < 2) {
strcpy(line, "Connect ");
printf("(to) ");
gets(&line[strlen(line)]);
makeargv();
argc = margc;
argv = margv;
}
if (argc > 3) {
printf("usage: %s host-name [service-type]\n", argv[0]);
return;
}
if (argc == 2) servicetype = TTYService_sa; /* default to 1 */
else if (strcmp(argv[2],"sa") == 0) servicetype = TTYService_sa;
else if (strncmp(argv[2],"re",2) == 0 ||
strcmp(argv[2],"exec") == 0) servicetype = TTYService_exec;
else if (strcmp(argv[2],"its") == 0) servicetype = TTYService_its;
else servicetype = atoi(argv[2]);
CH_NameDefault(&hdefault);
hostoname = CH_StringToName(argv[1], &hdefault);
if ((host = CH_LookupAddrDN(hostoname,0,hnamebuf,sizeof(hnamebuf)))) {
sin.sns_family = AF_NS;
host->x_port = htons(IDPPORT_COURIER);
bcopy(host, (caddr_t)&sin.sns_addr, sizeof(host));
/* hnamebuf is filled in by CH_LookupAddrDN */
hostname = hnamebuf;
} else if ((host = getXNSaddr(argv[1]))) {
sin.sns_family = AF_NS;
bcopy(host, (caddr_t)&sin.sns_addr, sizeof(host));
strcpy(hnamebuf, argv[1]);
hostname = hnamebuf;
} else {
printf("%s: unknown host\n", argv[1]);
return;
}
cconn = CourierOpen(host);
if(cconn == NULL) {
fprintf(stderr,"Courier connection failed\n");
return;
}
net = *(int*)cconn;
signal(SIGINT, intr);
signal(SIGPIPE, deadpeer);
printf("Trying...\n");
if (createsession(cconn,servicetype) < 0)
return;
connected++;
call(status, "status", 0);
sleep(1);
if (setjmp(peerdied) == 0)
telnet(net);
fprintf(stderr, "\nConnection closed by foreign host.\n");
exit(1);
}
/*
* create a session
*/
createsession(cconn, servicetype)
CourierConnection *cconn;
LongCardinal servicetype;
{
GAP3_SessionParameterObject pobj;
GAP3_TransportObject tobjs[2];
GAP3_CommParamObject *cp;
struct {
Cardinal length;
GAP3_TransportObject *sequence;
} tobjlist;
Authentication1_Credentials creds;
Authentication1_Verifier verifier;
pobj.designator = GAP3_oldTtyHost; /* 11 */
pobj.GAP3_oldTtyHost_case.charLength = GAP3_seven;
pobj.GAP3_oldTtyHost_case.parity = GAP3_none;
pobj.GAP3_oldTtyHost_case.stopBits = GAP3_oneStopBit;
pobj.GAP3_oldTtyHost_case.frameTimeout = 20;
/*
tobjs[0].designator = GAP3_rs232c;
cp = &tobjs[0].GAP3_rs232c_case.commParams;
cp->accessDetail.designator = GAP3_directConn;
cp->accessDetail.directConn_case.duplex = GAP3_fullduplex;
cp->accessDetail.directConn_case.lineType = GAP3_asynchronous;
cp->accessDetail.directConn_case.lineSpeed = GAP3_bps300;
tobjs[0].rs232c_case.preemptOthers = GAP3_preemptInactive;
tobjs[0].rs232c_case.preemptMe = GAP3_preemptInactive;
tobjs[0].rs232c_case.phoneNumber = "";
tobjs[0].rs232c_case.line.designator = GAP3_reserveNeeded;
tobjs[0].rs232c_case.line.reserveNeeded_case.lineNumber = 1;
*/
tobjs[0].designator = GAP3_service;
tobjs[0].GAP3_service_case.id = servicetype; /* 1 == SA */
tobjs[1].designator = GAP3_teletype;
tobjlist.length = 2;
tobjlist.sequence = tobjs;
MakeSimpleCredsAndVerifier(0, 0, &creds, &verifier);
DURING
(void) GAP3_Create(cconn, NULL, pobj, tobjlist, 0, creds, verifier);
HANDLER {
char *msg;
switch (Exception.Code) {
case GAP3_mediumConnectFailed:
msg = "medium connect failed";
break;
case GAP3_illegalTransport:
msg = "illegal transport type";
break;
case GAP3_tooManyGateStreams:
case GAP3_serviceTooBusy:
msg = "insufficient resources";
break;
case GAP3_serviceNotFound:
msg = "service type not found";
break;
case GAP3_userNotAuthenticated:
case GAP3_userNotAuthorized:
msg = "authentication problem";
break;
case REJECT_ERROR:
switch (CourierErrArgs(rejectionDetails,designator)){
case noSuchProgramNumber:
msg = "server does not support GAP";
break;
case noSuchVersionNumber:
msg = "server does not support our GAP version";
break;
default:
msg = "connection rejected";
}
break;
case PROTOCOL_VIOLATION:
msg = "protocol violation by remote server";
break;
default:
msg = "some random error";
break;
}
fprintf(stderr,"Error creating connection, %s\n",
msg);
return(-1);
} END_HANDLER;
return(0);
}
/*
* Print status about the connection.
*/
/*VARARGS*/
status()
{
if (connected)
printf("Connected to %s.\n", hostname);
else
printf("No connection.\n");
printf("Escape character is '%s'.\n", control(escape));
fflush(stdout);
}
makeargv()
{
register char *cp;
register char **argp = margv;
margc = 0;
for (cp = line; *cp;) {
while (isspace(*cp))
cp++;
if (*cp == '\0')
break;
*argp++ = cp;
margc += 1;
while (*cp != '\0' && !isspace(*cp))
cp++;
if (*cp == '\0')
break;
*cp++ = '\0';
}
*argp++ = 0;
}
/*VARARGS*/
suspend()
{
register int save;
save = mode(0);
kill(0, SIGTSTP);
/* reget parameters in case they were changed */
ioctl(0, TIOCGETP, (char *)&ottyb);
ioctl(0, TIOCGETC, (char *)&otc);
ioctl(0, TIOCGLTC, (char *)&oltc);
(void) mode(save);
}
/*VARARGS*/
bye()
{
register char *op;
(void) mode(0);
if (connected) {
sendoobdata(GAPCTLcleanup);
setsockopt(net, NSPROTO_SPP, SO_HEADERS_ON_OUTPUT, &on,
sizeof(on));
sppclose(net);
printf("Connection closed.\n");
connected = 0;
}
}
/*VARARGS*/
quit()
{
call(bye, "bye", 0);
exit(0);
}
/*
* Toggle debugging
*/
setdebug(argc, argv)
{
debug = ~debug;
}
/*
* Toggle logging
*/
setlog(argc, argv)
int argc;
char *argv[];
{
if (argc > 2)
printf("Syntax: %s [filename]\n",argv[0]);
else if (logfile != (FILE*) 0) {
/* currently logging */
fclose(logfile);
printf("Log file closed\n");
logfile = (FILE*) 0;
if (argc == 2 && (logfile = fopen(argv[1],"a")) != (FILE*)0)
printf("Logging to %s\n",argv[1]);
} else {
/* not currently logging */
if (argc == 1)
printf("Logging already disabled\n");
else if (argc == 2 &&
(logfile = fopen(argv[1],"a")) != (FILE*)0 )
printf("Logging to %s\n",argv[1]);
}
}
/*
* Help command.
*/
help(argc, argv)
int argc;
char *argv[];
{
register struct cmd *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name; c++)
printf("%-*s\t%s\n", HELPINDENT, c->name, c->help);
return;
}
while (--argc > 0) {
register char *arg;
arg = *++argv;
c = getcmd(arg);
if (c == (struct cmd *)-1)
printf("?Ambiguous help command %s\n", arg);
else if (c == (struct cmd *)0)
printf("?Invalid help command %s\n", arg);
else
printf("%s\n", c->help);
}
}
/*
* Call routine with argc, argv set from args (terminated by 0).
* VARARGS2
*/
call(routine, args)
int (*routine)();
int args;
{
register int *argp;
register int argc;
for (argc = 0, argp = &args; *argp++ != 0; argc++)
;
(*routine)(argc, &args);
}
struct tchars notc = { -1, -1, -1, -1, -1, -1 };
struct ltchars noltc = { -1, -1, -1, -1, -1, -1 };
mode(f)
register int f;
{
static int prevmode = 0;
struct tchars *tc;
struct ltchars *ltc;
struct sgttyb sb;
int onoff, old;
if (prevmode == f)
return (f);
old = prevmode;
prevmode = f;
sb = ottyb;
switch (f) {
case 0:
onoff = 0;
tc = &otc;
ltc = &oltc;
break;
case 1:
case 2:
sb.sg_flags |= CBREAK;
if (f == 1)
sb.sg_flags &= ~(ECHO|CRMOD);
else
sb.sg_flags |= ECHO|CRMOD;
sb.sg_erase = sb.sg_kill = -1;
tc = ¬c;
ltc = &noltc;
onoff = 1;
break;
default:
return (old);
}
ioctl(fileno(stdin), TIOCSLTC, (char *)ltc);
ioctl(fileno(stdin), TIOCSETC, (char *)tc);
ioctl(fileno(stdin), TIOCSETP, (char *)&sb);
ioctl(fileno(stdin), FIONBIO, &onoff);
ioctl(fileno(stdout), FIONBIO, &onoff);
return (old);
}
struct {struct sphdr hdr;
char data[BUFSIZ];
} sibuf;
char *sbp;
char tibuf[BUFSIZ], *tbp;
int scc, tcc;
/*
* Select from tty and network...
*/
telnet(s)
int s;
{
register int c;
int tin = fileno(stdin), tout = fileno(stdout);
int on = 1;
int ibits, obits;
(void) mode(1);
ioctl(s, FIONBIO, &on);
changeSPPopts(net, GAPCTLnone, 1); /* datastream "normal", eom */
for (;;) {
ibits = obits = 0;
if (nfrontp - nbackp)
obits |= (1 << s);
else
ibits |= (1 << tin);
if (tfrontp - tbackp)
obits |= (1 << tout);
else
ibits |= (1 << s);
if (scc < 0 && tcc < 0)
break;
select(16, &ibits, &obits, 0, 0);
if (ibits == 0 && obits == 0) {
sleep(5);
continue;
}
/*
* Something to read from the network...
*/
if (ibits & (1 << s)) {
scc = read(s, &sibuf, sizeof (sibuf))
- sizeof(struct sphdr);
#ifdef DEBUG
if (debug)
printf("reading %d bytes from net\n", scc);
#endif
if (scc < 0 && errno == EWOULDBLOCK)
scc = 0;
else if (scc < 0)
break; /* protocol violation? */
else if (sibuf.hdr.sp_cc & SP_OB) {
/* status or OOB control */
switch ((u_char) *sibuf.data) {
case GAPCTLareYouThere:
sendoobdata(GAPCTLiAmHere);
break;
case GAPCTLmediumDown:
(void) mode(0);
longjmp(peerdied, -1);
/*NOTREACHED*/
default:
/* ignore others */
break;
}
scc = 0;
}
else if (sibuf.hdr.sp_dt == GAPCTLnone ||
sibuf.hdr.sp_dt == 0) {
/* normal case, plus Lisp bogosity */
sbp = sibuf.data;
}
else if(sibuf.hdr.sp_dt == GAPCTLcleanup){
sendoobdata(GAPCTLcleanup);
/* should get an END next */
scc = 0;
}
else if(sibuf.hdr.sp_dt == SPPSST_END) {
setsockopt(net, NSPROTO_SPP,
SO_HEADERS_ON_OUTPUT,
&on, sizeof(on));
sppclosereply(net);
(void) mode(0);
longjmp(peerdied, -1);
/*NOTREACHED*/
}
else scc = 0; /* ignore other inband controls */
}
/*
* Something to read from the tty...
*/
if (ibits & (1 << tin)) {
tcc = read(tin, tibuf, sizeof (tibuf));
if (tcc < 0 && errno == EWOULDBLOCK)
tcc = 0;
else {
if (tcc <= 0)
break;
tbp = tibuf;
}
}
while (tcc > 0) {
register int c;
if ((&netobuf[BUFSIZ] - nfrontp) < 2)
break;
c = *tbp++ & 0377, tcc--;
if (strip(c) == escape) {
command(0);
tcc = 0;
break;
}
/* We don't do any input translation at the moment */
#ifdef notdef
switch (c) {
case '\n':
*nfrontp++ = '\r';
*nfrontp++ = '\n';
break;
case '\r':
*nfrontp++ = '\r';
*nfrontp++ = '\n';
break;
default:
*nfrontp++ = c;
break;
}
#else
*nfrontp++ = c;
#endif /* notdef */
}
if ((obits & (1 << s)) && (nfrontp - nbackp) > 0)
netflush(s);
while (scc > 0) {
register int c;
c = *sbp++&0377; scc--;
/* nor do we do any output translation */
*tfrontp++ = c;
}
if ((obits & (1 << tout)) && (tfrontp - tbackp) > 0)
ttyflush(tout);
}
(void) mode(0);
}
command(top)
int top;
{
register struct cmd *c;
int oldmode, wasopen;
oldmode = mode(0);
if (!top)
putchar('\n');
else
signal(SIGINT, SIG_DFL);
for (;;) {
printf("%s> ", prompt);
if (gets(line) == 0) {
if (feof(stdin)) {
clearerr(stdin);
putchar('\n');
}
break;
}
if (line[0] == 0)
break;
makeargv();
c = getcmd(margv[0]);
if (c == (struct cmd *)-1) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
(*c->handler)(margc, margv);
if (c->handler != help)
break;
}
if (!top) {
if (!connected)
longjmp(toplevel, 1);
(void) mode(oldmode);
}
}
/*
* Set the escape character.
*/
setescape(argc, argv)
int argc;
char *argv[];
{
register char *arg;
char buf[50];
if (argc > 2)
arg = argv[1];
else {
printf("new escape character: ");
gets(buf);
arg = buf;
}
if (arg[0] != '\0')
escape = arg[0];
printf("Escape character is '%s'.\n", control(escape));
fflush(stdout);
}
/*
* Construct a control character sequence
* for a special character.
*/
char *
control(c)
register int c;
{
static char buf[3];
if (c == 0177)
return ("^?");
if (c >= 040) {
buf[0] = c;
buf[1] = 0;
} else {
buf[0] = '^';
buf[1] = '@'+c;
buf[2] = 0;
}
return (buf);
}
struct cmd *
getcmd(name)
register char *name;
{
register char *p, *q;
register struct cmd *c, *found;
register int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; p = c->name; c++) {
for (q = name; *q == *p++; q++)
if (*q == 0) /* exact match? */
return (c);
if (!*q) { /* the name was a prefix */
if (q - name > longest) {
longest = q - name;
nmatches = 1;
found = c;
} else if (q - name == longest)
nmatches++;
}
}
if (nmatches > 1)
return ((struct cmd *)-1);
return (found);
}
deadpeer()
{
(void) mode(0);
longjmp(peerdied, -1);
}
intr()
{
(void) mode(0);
longjmp(toplevel, -1);
}
ttyflush(fd)
{
register int n;
if ((n = tfrontp - tbackp) > 0) {
if (logfile != (FILE*)0)
fwrite(tbackp, 1, n, logfile);
n = write(fd, tbackp, n);
}
if (n < 0)
return;
tbackp += n;
if (tbackp == tfrontp)
tbackp = tfrontp = ttyobuf;
}
netflush(fd)
{
int n;
if ((n = nfrontp - nbackp) > 0)
n = write(fd, nbackp, n);
#ifdef DEBUG
if (debug)
printf("writing %d of %d bytes to net\n", n, nfrontp-nbackp);
#endif
if (n < 0) {
if (errno != ENOBUFS && errno != EWOULDBLOCK) {
(void) mode(0);
perror(hostname);
close(fd);
longjmp(peerdied, -1);
/*NOTREACHED*/
}
n = 0;
}
nbackp += n;
if (nbackp == nfrontp)
nbackp = nfrontp = netobuf;
}
/*
* Send out of band data to other end of network
*/
sendoobdata(value)
char value;
{
send(net, &value, 1, MSG_OOB);
}
changeSPPopts(s, stream, eom)
int s; /* SPP socket */
u_char stream; /* datastream type */
char eom; /* Boolean EOM */
{
struct sphdr sphdr;
int off = 0;
sphdr.sp_dt = stream;
sphdr.sp_cc = (eom ? SP_EM : 0);
setsockopt(s, NSPROTO_SPP, SO_HEADERS_ON_OUTPUT, &off, sizeof(off));
setsockopt(s, NSPROTO_SPP, SO_DEFAULT_HEADERS, &sphdr, sizeof(sphdr));
}