From f4c54c5174d50224a745d5ed71ad1563a9440083 Mon Sep 17 00:00:00 2001
From: Dirk Koopman <djk@tobit.co.uk>
Date: Tue, 9 Oct 2007 15:27:00 +0100
Subject: [PATCH] fix new pc9x midnight rollover bug

---
 Changes              |  2 ++
 perl/DXProtHandle.pm | 30 ++++++++++++++++--------------
 perl/Route/Node.pm   |  1 -
 perl/Version.pm      |  2 +-
 perl/test_lastid.pl  | 40 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 59 insertions(+), 16 deletions(-)
 create mode 100755 perl/test_lastid.pl

diff --git a/Changes b/Changes
index 2a1f37d3..828c4284 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,5 @@
+09Oct07=======================================================================
+1. Added *VERY* important change to prevent loops on PC9x sentences.
 06Oct07=======================================================================
 1. added the possibility of having a motd_ax25 especially for sending to
 radio connections after a suggestion by Paolo YV1DIG.
diff --git a/perl/DXProtHandle.pm b/perl/DXProtHandle.pm
index d73bbc62..7db433e5 100644
--- a/perl/DXProtHandle.pm
+++ b/perl/DXProtHandle.pm
@@ -49,7 +49,7 @@ use vars qw($pc11_max_age $pc23_max_age $last_pc50 $eph_restime $eph_info_restim
 
 $pc9x_past_age = 62*60;			# maximum age in the past of a px9x (a config record might be the only
 								# thing a node might send - once an hour)
-$pc9x_future_age = 5*60;		# maximum age in the future ditto
+$pc9x_future_age = 2*3600;		# maximum age in the future ditto
 $pc10_dupe_age = 45;			# just something to catch duplicate PC10->PC93 conversions
 $pc92_slug_changes = 60;		# slug any changes going outward for this long
 $last_pc92_slug = 0;			# the last time we sent out any delayed add or del PC92s
@@ -1485,20 +1485,22 @@ sub check_pc9x_t
 		# the id on it is completely unreliable. Besides, only commands
 		# originating on this box will go through this code...
 		if ($parent->call ne $main::mycall) {
-			my $lastid = $parent->lastid || 0;
-			if ($t < $lastid) {
-				if ($t+86400-$lastid > $pc9x_past_age) {
-					dbg("PCPROT: dup id on $t <= $lastid, ignored") if isdbg('chanerr');
-					return;
-				}
-			} elsif ($t == $lastid) {
-				dbg("PCPROT: dup id on $t == $lastid, ignored") if isdbg('chanerr');
-				return;
-			} else {
-				# $t > $lastid, check that the timestamp offered isn't too far away from 'now'
-				if ($t+$main::systime_daystart-$main::systime > $pc9x_future_age ) {
-					dbg("PCPROT: id $t too far in the future, ignored") if isdbg('chanerr');
+			my $lastid = $parent->lastid;
+			if (defined $lastid) {
+				if ($t < $lastid) {
+					if ($t+86400-$lastid > $pc9x_past_age) {
+						dbg("PCPROT: dup id on $t <= lastid $lastid, ignored") if isdbg('chanerr');
+						return;
+					}
+				} elsif ($t == $lastid) {
+					dbg("PCPROT: dup id on $t == lastid $lastid, ignored") if isdbg('chanerr');
 					return;
+				} else {
+					# $t > $lastid, check that the timestamp offered isn't too far away from 'now'
+					if ($t-$lastid > $pc9x_future_age ) {
+						dbg("PCPROT: id $t too far in the future of lastid $lastid, ignored") if isdbg('chanerr');
+						return;
+					}
 				}
 			}
 		}
diff --git a/perl/Route/Node.pm b/perl/Route/Node.pm
index 6e7d9315..23e29382 100644
--- a/perl/Route/Node.pm
+++ b/perl/Route/Node.pm
@@ -286,7 +286,6 @@ sub new
 	$self->{flags} = shift || Route::here(1);
 	$self->{users} = [];
 	$self->{nodes} = [];
-	$self->{lastid} = 0;
 	$self->{PC92C_dxchan} = '';
 	$self->reset_obs;			# by definition
 
diff --git a/perl/Version.pm b/perl/Version.pm
index a0cbffae..23503da1 100644
--- a/perl/Version.pm
+++ b/perl/Version.pm
@@ -11,6 +11,6 @@ use vars qw($version $subversion $build);
 
 $version = '1.54';
 $subversion = '0';
-$build = '164';
+$build = '165';
 
 1;
diff --git a/perl/test_lastid.pl b/perl/test_lastid.pl
new file mode 100755
index 00000000..1bd0ea3b
--- /dev/null
+++ b/perl/test_lastid.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+
+my $pc9x_past_age = 3600;
+my $pc9x_future_age = 3600*2;
+my $lastid;
+
+try($_) for qw(85955 85968 518 85967 519 85968 520 85969), @ARGV;
+
+exit 0;
+
+sub try
+{
+	my $t = shift;
+
+	print "$t : ";
+
+	if (defined $lastid) {
+		if ($t < $lastid) {
+			my $wt;
+			if (($wt = $t+86400-$lastid) > $pc9x_past_age) {
+				print "PCPROT: dup id on $t + 86400 - $lastid ($wt) > $pc9x_past_age, ignored\n";
+				return;
+			}
+			print "wt = $wt ";
+		} elsif ($t == $lastid) {
+			print "PCPROT: dup id on $t == $lastid, ignored\n";
+			return;
+		} elsif ($t > $lastid) {
+			if ($t - $lastid > $pc9x_future_age) {
+				print "PCPROT: dup id $t too far in future on $lastid\n";
+				return;
+			}
+		}
+	}
+
+	print "$lastid Ok\n";
+	$lastid = $t;
+}
+
+
-- 
2.34.1