Improve racal2pcap for other tests like 6113 call signalling tests

The text logs have stuff like UNIT DATA INDICATION which we didn't
parse so far

racal6113/racal2pcap.pl

@@ -80,16 +80,18 @@ while (my $line = <STDIN>) {
 		}
 	}
 	if ($state == 0) {
-		if ($line =~ /^MDL_ASSIGN_REQUEST  ces = (\d+),tei = (\d+)/) {
+		if ($line =~ /MDL_ASSIGN_REQUEST  ces = (\d+),tei = (\d+)/) {
 			$ces_to_tei{$1} = $2;
+		} elsif ($line =~ /^\**DL ESTABLISH REQUEST  sapi = (\d+),  ces = (\d+)/) {
+			$ces_to_tei{$2} = $1;
 		}
-		if ($line =~ /^DL DATA INDICATION  sapi = (\d+),  ces = (\d+)/) {
-			$tei = $ces_to_tei{$2};
-			$sapi = $1;
+		if ($line =~ /DL (UNIT )?DATA INDICATION  sapi = (\d+),  ces = (\d+)/) {
+			$tei = $ces_to_tei{$3};
+			$sapi = $2;
 			$state = 1;
 			$msg_hex = "";
-		} elsif ($line =~ /^DL_DATA_REQUEST  sapi = (\d+)/) {
-			$sapi = $1;
+		} elsif ($line =~ /DL_(UNIT)?DATA_REQUEST  sapi = (\d+)/) {
+			$sapi = $2;
 			$state = 2;
 			$msg_hex = "";
 		}