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net: ipv6: add support for rpl sr exthdr

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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>
This commit is contained in:
Alexander Aring
2020-03-27 18:00:20 -04:00
committed by David S. Miller
parent f37c605936
commit 8610c7c6e3
7 changed files with 370 additions and 3 deletions
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2
include/uapi/linux/ipv6.h
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@@ -40,6 +40,7 @@ struct in6_ifreq {
#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
#define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */
#define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
/*
@@ -187,6 +188,7 @@ enum {
DEVCONF_DISABLE_POLICY,
DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
DEVCONF_NDISC_TCLASS,
DEVCONF_RPL_SEG_ENABLED,
DEVCONF_MAX
};