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xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info
Add a XFRM_STATE_AF_UNSPEC flag to handle the AF_UNSPEC behavior for the selector family. Userspace applications can set this flag to leave the selector family of the xfrm_state unspecified. This can be used to to handle inter family tunnels if the selector is not set from userspace. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -339,6 +339,7 @@ struct xfrm_usersa_info {
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#define XFRM_STATE_NOPMTUDISC 4
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#define XFRM_STATE_WILDRECV 8
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#define XFRM_STATE_ICMP 16
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#define XFRM_STATE_AF_UNSPEC 32
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};
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struct xfrm_usersa_id {
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@ -277,9 +277,8 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *
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memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
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x->props.flags = p->flags;
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if (!x->sel.family)
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if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
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x->sel.family = p->family;
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}
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/*
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