[IPV6]: Find option offset by type.

This is a helper to search option offset from extension header which
can carry TLV option like destination options header.

Mobile IPv6 home address option will use it.

Based on MIPL2 kernel patch.

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>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ece7e8a84ff..c4ea1271057 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -506,6 +506,8 @@ extern int			ipv6_skip_exthdr(const struct sk_buff *, int start,
 
 extern int                      ipv6_ext_hdr(u8 nexthdr);
 
+extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
+
 extern struct ipv6_txoptions *  ipv6_invert_rthdr(struct sock *sk,
                                                   struct ipv6_rt_hdr *hdr);