Commit 5829d70b authored by Committed by David S. Miller
ipv6: sr: fix get_srh() to comply with IPv6 standard "RFC 8200"
IPv6 packet may carry more than one extension header, and IPv6 nodes must accept and attempt to process extension headers in any order and occurring any number of times in the same packet. Hence, there should be no assumption that Segment Routing extension header is to appear immediately after the IPv6 header. Moreover, section 4.1 of RFC 8200 gives a recommendation on the order of appearance of those extension headers within an IPv6 packet. According to this recommendation, Segment Routing extension header should appear after Hop-by-Hop and Destination Options headers (if they present). This patch fixes the get_srh(), so it gets the segment routing header regardless of its position in the chain of the extension headers in IPv6 packet, and makes sure that the IPv6 routing extension header is of Type 4. Signed-off-by: Ahmed Abdelsalam <[email protected]> Acked-by: David Lebrun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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