6lowpan: add nhc module for GHC fragmentation 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 e5184e65d4d3b7c64524197acf1f997e152eea0c..13abcc56eae62eb0f02423746a304eaa9aa6265b 100644 (file)
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -81,4 +81,10 @@ config 6LOWPAN_GHC_EXT_HDR_DEST
          6LoWPAN IPv6 destination option generic header compression according
          to RFC7400.
 
+config 6LOWPAN_GHC_EXT_HDR_FRAG
+       tristate "GHC Fragmentation Options Header Support"
+       ---help---
+         6LoWPAN IPv6 fragmentation option generic header compression
+         according to RFC7400.
+
 endif

diff --git a/net/6lowpan/Makefile b/net/6lowpan/Makefile
index fc4bac00bd20b30c2b0502ec788177f6d10d8dd2..fb3f48d786045bb0f381456e53c4d472b5a90295 100644 (file)
--- a/net/6lowpan/Makefile
+++ b/net/6lowpan/Makefile
@@ -16,3 +16,4 @@ 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
+obj-$(CONFIG_6LOWPAN_GHC_EXT_HDR_FRAG) += nhc_ghc_ext_frag.o

diff --git a/net/6lowpan/nhc_ghc_ext_frag.c b/net/6lowpan/nhc_ghc_ext_frag.c
new file mode 100644 (file)
index 0000000..1308b79
--- /dev/null
+++ b/net/6lowpan/nhc_ghc_ext_frag.c
@@ -0,0 +1,28 @@
+/*
+ *     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_FRAG_IDLEN      1
+#define LOWPAN_GHC_EXT_FRAG_ID_0       0xb4
+#define LOWPAN_GHC_EXT_FRAG_MASK_0     0xfe
+
+static void frag_ghid_setup(struct lowpan_nhc *nhc)
+{
+       nhc->id[0] = LOWPAN_GHC_EXT_FRAG_ID_0;
+       nhc->idmask[0] = LOWPAN_GHC_EXT_FRAG_MASK_0;
+}
+
+LOWPAN_NHC(ghc_ext_frag, "RFC7400 Fragmentation Extension Header",
+          NEXTHDR_FRAGMENT, 0, frag_ghid_setup,
+          LOWPAN_GHC_EXT_FRAG_IDLEN, NULL, NULL);
+
+module_lowpan_nhc(ghc_ext_frag);
+MODULE_DESCRIPTION("6LoWPAN generic header fragmentation extension compression");
+MODULE_LICENSE("GPL");