[PATCH bluetooth-next 3/4] 6lowpan: add nhc module for GHC UDP detection

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Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
---
 net/6lowpan/Kconfig       |  5 +++++
 net/6lowpan/Makefile      |  1 +
 net/6lowpan/nhc_ghc_udp.c | 27 +++++++++++++++++++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 net/6lowpan/nhc_ghc_udp.c

diff --git a/net/6lowpan/Kconfig b/net/6lowpan/Kconfig
index f541f50..67a786b 100644
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -64,4 +64,9 @@ config 6LOWPAN_GHC_EXTENSION_HEADER
 	default y
 	---help---
 
+config 6LOWPAN_GHC_UDP
+	tristate "GHC UDP Support"
+	default y
+	---help---
+
 endif
diff --git a/net/6lowpan/Makefile b/net/6lowpan/Makefile
index 2b42bd0..fc65efb 100644
--- a/net/6lowpan/Makefile
+++ b/net/6lowpan/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_6LOWPAN_NHC_UDP) += nhc_udp.o
 
 #rfc7400 ghcs
 obj-$(CONFIG_6LOWPAN_GHC_EXTENSION_HEADER) += nhc_ghc_extension_header.o
+obj-$(CONFIG_6LOWPAN_GHC_UDP) += nhc_ghc_udp.o
diff --git a/net/6lowpan/nhc_ghc_udp.c b/net/6lowpan/nhc_ghc_udp.c
new file mode 100644
index 0000000..2675683
--- /dev/null
+++ b/net/6lowpan/nhc_ghc_udp.c
@@ -0,0 +1,27 @@
+/*
+ *	6LoWPAN UDP compression according to RFC7400
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include "nhc.h"
+
+#define LOWPAN_GHC_UDP_IDLEN	1
+#define LOWPAN_GHC_UDP_ID_0	0xd0
+#define LOWPAN_GHC_UDP_MASK_0	0xf8
+
+static void udp_ghid_setup(struct lowpan_nhc *nhc)
+{
+	nhc->id[0] = LOWPAN_GHC_UDP_ID_0;
+	nhc->idmask[0] = LOWPAN_GHC_UDP_MASK_0;
+}
+
+LOWPAN_NHC(ghc_udp, "RFC7400 UDP", NEXTHDR_HOP, 0,
+	   udp_ghid_setup, LOWPAN_GHC_UDP_IDLEN, NULL, NULL);
+
+module_lowpan_nhc(ghc_udp);
+MODULE_DESCRIPTION("6LoWPAN generic header RFC7400 UDP compression");
+MODULE_LICENSE("GPL");
-- 
2.4.3

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