1 files changed, 21 insertions, 1 deletions

diff --git a/net/6lowpan/nhc_udp.c b/net/6lowpan/nhc_udp.c
index 72d0b57eb6e5..69537a2eaab1 100644
--- a/net/6lowpan/nhc_udp.c
+++ b/net/6lowpan/nhc_udp.c
@@ -17,7 +17,27 @@
 
 #include "nhc.h"
 
-#define LOWPAN_NHC_UDP_IDLEN    1
+#define LOWPAN_NHC_UDP_MASK             0xF8
+#define LOWPAN_NHC_UDP_ID               0xF0
+#define LOWPAN_NHC_UDP_IDLEN            1
+
+#define LOWPAN_NHC_UDP_4BIT_PORT        0xF0B0
+#define LOWPAN_NHC_UDP_4BIT_MASK        0xFFF0
+#define LOWPAN_NHC_UDP_8BIT_PORT        0xF000
+#define LOWPAN_NHC_UDP_8BIT_MASK        0xFF00
+
+/* values for port compression, _with checksum_ ie bit 5 set to 0 */
+
+/* all inline */
+#define LOWPAN_NHC_UDP_CS_P_00  0xF0
+/* source 16bit inline, dest = 0xF0 + 8 bit inline */
+#define LOWPAN_NHC_UDP_CS_P_01  0xF1
+/* source = 0xF0 + 8bit inline, dest = 16 bit inline */
+#define LOWPAN_NHC_UDP_CS_P_10  0xF2
+/* source & dest = 0xF0B + 4bit inline */
+#define LOWPAN_NHC_UDP_CS_P_11  0xF3
+/* checksum elided */
+#define LOWPAN_NHC_UDP_CS_C     0x04
 
 static int udp_uncompress(struct sk_buff *skb, size_t needed)
 {