diff --git a/gencode.c b/gencode.c
index 16ef9e9..15ecda2 100644
--- a/gencode.c
+++ b/gencode.c
@@ -21,7 +21,7 @@
  */
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.207 2004-07-15 00:08:06 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.208 2004-08-18 14:25:02 hannes Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -750,6 +750,7 @@ init_linktype(type)
 		return;
 
 	case DLT_PPP:
+        case DLT_PPP_WITHDIRECTION:
 	case DLT_C_HDLC:		/* BSD/OS Cisco HDLC */
 	case DLT_PPP_SERIAL:		/* NetBSD sync/async serial PPP */
 		off_linktype = 2;
@@ -1506,6 +1507,7 @@ gen_linktype(proto)
 		break;
 
 	case DLT_PPP:
+        case DLT_PPP_WITHDIRECTION:
 	case DLT_PPP_SERIAL:
 	case DLT_PPP_ETHER:
 		/*
@@ -5067,6 +5069,16 @@ gen_inbound(dir)
 		    (bpf_int32)((dir == 0) ? PF_IN : PF_OUT));
 		break;
 
+        case DLT_PPP_WITHDIRECTION:
+                if (dir) {
+                    /* match outgoing packets */
+                    b0 = gen_cmp(0, BPF_B, PPP_WITHDIRECTION_OUT);
+                } else {
+                    /* match incoming packets */
+                    b0 = gen_cmp(0, BPF_B, PPP_WITHDIRECTION_IN);
+                }
+                break;
+
 	default:
 		bpf_error("inbound/outbound not supported on linktype %d",
 		    linktype);
diff --git a/pcap-bpf.h b/pcap-bpf.h
index 4957988..c8c6a4e 100644
--- a/pcap-bpf.h
+++ b/pcap-bpf.h
@@ -37,7 +37,7 @@
  *
  *      @(#)bpf.h       7.1 (Berkeley) 5/7/91
  *
- * @(#) $Header: /tcpdump/master/libpcap/pcap-bpf.h,v 1.21 2004-06-07 20:00:08 guy Exp $ (LBL)
+ * @(#) $Header: /tcpdump/master/libpcap/pcap-bpf.h,v 1.22 2004-08-18 14:25:01 hannes Exp $ (LBL)
  */
 
 /*
@@ -509,6 +509,13 @@ struct bpf_version {
  */
 #define DLT_BACNET_MS_TP	165
 
+/*
+ * another PPP variant as per request from Karsten Keil <kkeil@suse.de>
+ * the first byte of the PPP header (0xff03) is modified to accomodate
+ * the direction 0x00 = IN, 0x01 = OUT
+ */
+#define DLT_PPP_WITHDIRECTION   166
+
 /*
  * The instruction encodings.
  */
diff --git a/ppp.h b/ppp.h
index 6bd4d96..4eb9c9c 100644
--- a/ppp.h
+++ b/ppp.h
@@ -1,4 +1,4 @@
-/* @(#) $Header: /tcpdump/master/libpcap/ppp.h,v 1.9 2004-06-16 08:20:28 hannes Exp $ (LBL) */
+/* @(#) $Header: /tcpdump/master/libpcap/ppp.h,v 1.10 2004-08-18 14:25:01 hannes Exp $ (LBL) */
 /*
  * Point to Point Protocol (PPP) RFC1331
  *
@@ -18,6 +18,9 @@
 #define PPP_ADDRESS	0xff	/* The address byte value */
 #define PPP_CONTROL	0x03	/* The control byte value */
 
+#define PPP_WITHDIRECTION_IN  0x00 /* non-standard for DLT_PPP_WITHDIRECTION */
+#define PPP_WITHDIRECTION_OUT 0x01 /* non-standard for DLT_PPP_WITHDIRECTION */
+
 /* Protocol numbers */
 #define PPP_IP		0x0021	/* Raw IP */
 #define PPP_OSI		0x0023	/* OSI Network Layer */
diff --git a/savefile.c b/savefile.c
index 6821b2f..dc89f24 100644
--- a/savefile.c
+++ b/savefile.c
@@ -30,7 +30,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/libpcap/savefile.c,v 1.108 2004-08-17 17:50:33 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/savefile.c,v 1.109 2004-08-18 14:25:01 hannes Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -333,6 +333,14 @@ static const char rcsid[] _U_ =
  */
 #define LINKTYPE_BACNET_MS_TP	165
 
+/*
+ * another PPP variant as per request from Karsten Keil <kkeil@suse.de>
+ * the first byte (0xff) of the PPP header (0xff03) is tweaked to accomodate
+ * the direction 0x00 = IN, 0x01 = OUT
+ */
+#define LINKTYPE_PPP_WITHDIRECTION 166
+
+
 static struct linktype_map {
 	int	dlt;
 	int	linktype;
@@ -497,6 +505,9 @@ static struct linktype_map {
 	/* BACnet MS/TP */
 	{ DLT_BACNET_MS_TP,	LINKTYPE_BACNET_MS_TP },
 
+        /* PPP with direction flag in the PPP header */
+        { DLT_PPP_WITHDIRECTION,LINKTYPE_PPP_WITHDIRECTION},
+
 	{ -1,			-1 }
 };