Commit 01be8e5d authored Aug 23, 2006 by Masahide NAKAMURA Committed by David S. Miller Sep 22, 2006

[IPV6] MIP6: Ignore to report if mobility headers is rejected.



Ignore to report user-space for known mobility headers rejected by
destination options header transformation.
Mobile IPv6 specification (RFC3775) says that mobility header
is used with destination options header carrying home address option
only for binding update message. Other type message cannot be used
and node must drop it silently (and must not send binding error) if
receving such packet.
To achieve it, (1) application should use transformation policy and
wild-card states to catch binding update message prior other packets
(2) kernel doesn't report the reject to user-space not to send
binding error message by application.
This patch is for (2).
Based on MIPL2 kernel patch.

This patch was also written by: Ville Nuorvala <vnuorval@tcs.hut.fi>

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 70182ed2

net/ipv6/mip6.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -234,6 +234,9 @@ static int mip6_destopt_reject(struct xfrm_state x, struct sk_buff skb, struct
		struct timeval stamp;
		int err = 0;

		if (unlikely(fl->proto == IPPROTO_MH && fl->fl_mh_type <= IP6_MH_TYPE_MAX))
		goto out;

		if (likely(opt->dsthao)) {
		offset = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO);
		if (likely(offset >= 0))

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