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authorAlexander Aring <alex.aring@gmail.com>2020-03-27 23:00:20 +0100
committerDavid S. Miller <davem@davemloft.net>2020-03-30 07:30:57 +0200
commit8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 (patch)
tree638528cb15fa478b0532b882f76a8212acfb2e66 /include/net
parentaddrconf: add functionality to check on rpl requirements (diff)
downloadlinux-8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3.tar.xz
linux-8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3.zip
net: ipv6: add support for rpl sr exthdr
This patch adds rpl source routing receive handling. Everything works only if sysconf "rpl_seg_enabled" and source routing is enabled. Mostly the same behaviour as IPv6 segmentation routing. To handle compression and uncompression a rpl.c file is created which contains the necessary functionality. The receive handling will also care about IPv6 encapsulated so far it's specified as possible nexthdr in RFC 6554. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/rpl.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/net/rpl.h b/include/net/rpl.h
new file mode 100644
index 000000000000..d694d49a61db
--- /dev/null
+++ b/include/net/rpl.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * RPL implementation
+ *
+ * Author:
+ * (C) 2020 Alexander Aring <alex.aring@gmail.com>
+ */
+
+#ifndef _NET_RPL_H
+#define _NET_RPL_H
+
+#include <linux/rpl.h>
+
+/* Worst decompression memory usage ipv6 address (16) + pad 7 */
+#define IPV6_RPL_SRH_WORST_SWAP_SIZE (sizeof(struct in6_addr) + 7)
+
+static inline size_t ipv6_rpl_srh_alloc_size(unsigned char n)
+{
+ return sizeof(struct ipv6_rpl_sr_hdr) +
+ ((n + 1) * sizeof(struct in6_addr));
+}
+
+size_t ipv6_rpl_srh_size(unsigned char n, unsigned char cmpri,
+ unsigned char cmpre);
+
+void ipv6_rpl_srh_decompress(struct ipv6_rpl_sr_hdr *outhdr,
+ const struct ipv6_rpl_sr_hdr *inhdr,
+ const struct in6_addr *daddr, unsigned char n);
+
+void ipv6_rpl_srh_compress(struct ipv6_rpl_sr_hdr *outhdr,
+ const struct ipv6_rpl_sr_hdr *inhdr,
+ const struct in6_addr *daddr, unsigned char n);
+
+#endif /* _NET_RPL_H */