From f6d25b8861f97439d7086e4569e209c46486d009 Mon Sep 17 00:00:00 2001
From: Fritz Elfert <felfert@to.com>
Date: Sun, 14 Jan 2001 22:28:37 +0000
Subject: - Added Hint for man pages in README. - Added signal handles for
 SIGINT and SIGTERM in ncpd for - properly shutting down the link. - Added
 flush() method in link.cc, needed for above feature. - If started with option
 -e and no -s option is given, assume being   started by mgetty and use the
 line ncpd is started on instead of   builtin default. - Added auto-reset in
 packet.cc. This helps making IrDA (ircomm-tty)   based connections. Still not
 satisfying as i sometimes have to   toggle infrared on the Psion (probably a
 bug in the Psion's IrDA).

---
 ncpd/packet.cc | 71 +++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 56 insertions(+), 15 deletions(-)

(limited to 'ncpd/packet.cc')

diff --git a/ncpd/packet.cc b/ncpd/packet.cc
index 2aa0509..5c05849 100644
--- a/ncpd/packet.cc
+++ b/ncpd/packet.cc
@@ -56,24 +56,42 @@ iow(_iow)
 	inLen = outLen = termLen = 0;
 	foundSync = 0;
 	esc = false;
+	lastFatal = false;
+	serialStatus = -1;
 	crcIn = crcOut = 0;
 
 	fd = init_serial(devname, baud, 0);
-	iow.addIO(fd);
+	if (fd == -1)
+		lastFatal = true;
+	else
+		iow.addIO(fd);
 }
 
 void packet::reset()
 {
-	iow.remIO(fd);
-	ser_exit(fd);
+	if (verbose & PKT_DEBUG_LOG)
+		cout << "resetting serial connection" << endl;
+	if (fd != -1) {
+		iow.remIO(fd);
+		ser_exit(fd);
+	}
 	usleep(100000);
 	inLen = outLen = termLen = 0;
+	inPtr = inBuffer;
+	outPtr = outBuffer;
 	foundSync = 0;
+	serialStatus = -1;
 	esc = false;
 	crcIn = crcOut = 0;
 
 	fd = init_serial(devname, baud, 0);
-	iow.addIO(fd);
+	if (fd != -1) {
+		iow.addIO(fd);
+		lastFatal = false;
+	}
+	if (verbose & PKT_DEBUG_LOG)
+		cout << "serial connection reset, fd=" << fd << endl;
+	sleep(1);
 }
 
 short int packet::
@@ -90,8 +108,10 @@ setVerbose(short int _verbose)
 
 packet::~packet()
 {
-	iow.remIO(fd);
-	ser_exit(fd);
+	if (fd != -1) {
+		iow.remIO(fd);
+		ser_exit(fd);
+	}
 	usleep(100000);
 	delete[]inBuffer;
 	delete[]outBuffer;
@@ -287,24 +307,45 @@ bool packet::
 linkFailed()
 {
 	int arg;
+	int res;
 	bool failed = false;
-	int res = ioctl(fd, TIOCMGET, &arg);
+
+	if (lastFatal)
+		reset();
+	res = ioctl(fd, TIOCMGET, &arg);
 	if (res < 0)
-		failed = true;
-	if (verbose & PKT_DEBUG_HANDSHAKE)
-		cout << "packet: DTR:" << ((arg & TIOCM_DTR)?1:0)
-			<< " RTS:" << ((arg & TIOCM_RTS)?1:0)
-			<< " DCD:" << ((arg & TIOCM_CAR)?1:0)
-			<< " DSR:" << ((arg & TIOCM_DSR)?1:0)
-			<< " CTS:" << ((arg & TIOCM_CTS)?1:0) << endl;
+		lastFatal = true;
+	if ((serialStatus == -1) || (arg != serialStatus)) {
+		if (verbose & PKT_DEBUG_HANDSHAKE)
+			cout << "packet: < DTR:" << ((arg & TIOCM_DTR)?1:0)
+			     << " RTS:" << ((arg & TIOCM_RTS)?1:0)
+			     << " DCD:" << ((arg & TIOCM_CAR)?1:0)
+			     << " DSR:" << ((arg & TIOCM_DSR)?1:0)
+			     << " CTS:" << ((arg & TIOCM_CTS)?1:0) << endl;
+		if (!((arg & TIOCM_RTS) && (arg & TIOCM_DTR))) {
+			arg |= (TIOCM_DTR | TIOCM_RTS);
+			res = ioctl(fd, TIOCMSET, &arg);
+			if (res < 0)
+				lastFatal = true;
+			if (verbose & PKT_DEBUG_HANDSHAKE)
+				cout << "packet: > DTR:" << ((arg & TIOCM_DTR)?1:0)
+				     << " RTS:" << ((arg & TIOCM_RTS)?1:0)
+				     << " DCD:" << ((arg & TIOCM_CAR)?1:0)
+				     << " DSR:" << ((arg & TIOCM_DSR)?1:0)
+				     << " CTS:" << ((arg & TIOCM_CTS)?1:0) << endl;
+		}
+		serialStatus = arg;
+	}
 #ifdef sun
 	if ((arg & TIOCM_CTS) == 0)
 #else
 	if (((arg & TIOCM_DSR) == 0) || ((arg & TIOCM_CTS) == 0))
 #endif
 		failed = true;
+	if ((verbose & PKT_DEBUG_LOG) && lastFatal)
+		cout << "packet: linkFATAL\n";
 	if ((verbose & PKT_DEBUG_LOG) && failed)
 		cout << "packet: linkFAILED\n";
-	return failed;
+	return lastFatal || failed;
 }
 
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