6lowpan: add nhc module for GHC routing extension header detection

Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

3 files changed, 34 insertions, 0 deletions

diff --git a/net/6lowpan/Kconfig b/net/6lowpan/Kconfig
index 13abcc56eae6..bcb9d8a21fc0 100644
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -87,4 +87,10 @@ config 6LOWPAN_GHC_EXT_HDR_FRAG
           6LoWPAN IPv6 fragmentation option generic header compression
           according to RFC7400.
 
+config 6LOWPAN_GHC_EXT_HDR_ROUTE
+        tristate "GHC Routing Options Header Support"
+        ---help---
+          6LoWPAN IPv6 routing option generic header compression according
+          to RFC7400.
+
 endif
diff --git a/net/6lowpan/Makefile b/net/6lowpan/Makefile
index fb3f48d78604..9e35a5d7b92d 100644
--- a/net/6lowpan/Makefile
+++ b/net/6lowpan/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_6LOWPAN_GHC_UDP) += nhc_ghc_udp.o
 obj-$(CONFIG_6LOWPAN_GHC_ICMPV6) += nhc_ghc_icmpv6.o
 obj-$(CONFIG_6LOWPAN_GHC_EXT_HDR_DEST) += nhc_ghc_ext_dest.o
 obj-$(CONFIG_6LOWPAN_GHC_EXT_HDR_FRAG) += nhc_ghc_ext_frag.o
+obj-$(CONFIG_6LOWPAN_GHC_EXT_HDR_ROUTE) += nhc_ghc_ext_route.o
diff --git a/net/6lowpan/nhc_ghc_ext_route.c b/net/6lowpan/nhc_ghc_ext_route.c
new file mode 100644
index 000000000000..d7e5bd791c62
--- /dev/null
+++ b/net/6lowpan/nhc_ghc_ext_route.c
@@ -0,0 +1,27 @@
+/*
+ *      6LoWPAN Extension Header 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_EXT_ROUTE_IDLEN      1
+#define LOWPAN_GHC_EXT_ROUTE_ID_0       0xb2
+#define LOWPAN_GHC_EXT_ROUTE_MASK_0     0xfe
+
+static void route_ghid_setup(struct lowpan_nhc *nhc)
+{
+        nhc->id[0] = LOWPAN_GHC_EXT_ROUTE_ID_0;
+        nhc->idmask[0] = LOWPAN_GHC_EXT_ROUTE_MASK_0;
+}
+
+LOWPAN_NHC(ghc_ext_route, "RFC7400 Routing Extension Header", NEXTHDR_ROUTING,
+           0, route_ghid_setup, LOWPAN_GHC_EXT_ROUTE_IDLEN, NULL, NULL);
+
+module_lowpan_nhc(ghc_ext_route);
+MODULE_DESCRIPTION("6LoWPAN generic header routing extension compression");
+MODULE_LICENSE("GPL");