6lowpan: add nhc module for GHC destination 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>

diff --git a/net/6lowpan/Kconfig b/net/6lowpan/Kconfig
index 0a3f5a8b0f6de73a937a7e1d56a3e7bc4889180a..e5184e65d4d3b7c64524197acf1f997e152eea0c 100644 (file)
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -75,4 +75,10 @@ config 6LOWPAN_GHC_ICMPV6
        ---help---
          6LoWPAN IPv6 ICMPv6 generic header compression according to RFC7400.
 
+config 6LOWPAN_GHC_EXT_HDR_DEST
+       tristate "GHC Destination Options Header Support"
+       ---help---
+         6LoWPAN IPv6 destination option generic header compression according
+         to RFC7400.
+
 endif

diff --git a/net/6lowpan/Makefile b/net/6lowpan/Makefile
index 86af3fd141a1b5eb11d38693ea9b0238b05d6847..fc4bac00bd20b30c2b0502ec788177f6d10d8dd2 100644 (file)
--- a/net/6lowpan/Makefile
+++ b/net/6lowpan/Makefile
@@ -15,3 +15,4 @@ obj-$(CONFIG_6LOWPAN_NHC_UDP) += nhc_udp.o
 obj-$(CONFIG_6LOWPAN_GHC_EXT_HDR_HOP) += nhc_ghc_ext_hop.o
 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

diff --git a/net/6lowpan/nhc_ghc_ext_dest.c b/net/6lowpan/nhc_ghc_ext_dest.c
new file mode 100644 (file)
index 0000000..9887b3a
--- /dev/null
+++ b/net/6lowpan/nhc_ghc_ext_dest.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_DEST_IDLEN      1
+#define LOWPAN_GHC_EXT_DEST_ID_0       0xb6
+#define LOWPAN_GHC_EXT_DEST_MASK_0     0xfe
+
+static void dest_ghid_setup(struct lowpan_nhc *nhc)
+{
+       nhc->id[0] = LOWPAN_GHC_EXT_DEST_ID_0;
+       nhc->idmask[0] = LOWPAN_GHC_EXT_DEST_MASK_0;
+}
+
+LOWPAN_NHC(ghc_ext_dest, "RFC7400 Destination Extension Header", NEXTHDR_DEST,
+          0, dest_ghid_setup, LOWPAN_GHC_EXT_DEST_IDLEN, NULL, NULL);
+
+module_lowpan_nhc(ghc_ext_dest);
+MODULE_DESCRIPTION("6LoWPAN generic header destination extension compression");
+MODULE_LICENSE("GPL");