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author | Steffen Klassert <steffen.klassert@secunet.com> | 2014-03-14 07:28:09 +0100 |
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committer | Steffen Klassert <steffen.klassert@secunet.com> | 2014-03-14 07:28:09 +0100 |
commit | 26be8e2db4352d1a69fa40b1126023efd2a26197 (patch) | |
tree | fb067beb1cee5d49fa11d2febb46ad2cb6e98d0b | |
parent | 22e1b23dafa8554ef722454e8b84645820cbbc17 (diff) | |
download | op-kernel-dev-26be8e2db4352d1a69fa40b1126023efd2a26197.zip op-kernel-dev-26be8e2db4352d1a69fa40b1126023efd2a26197.tar.gz |
vti6: Check the tunnel endpoints of the xfrm state and the vti interface
The tunnel endpoints of the xfrm_state we got from the xfrm_lookup
must match the tunnel endpoints of the vti interface. This patch
ensures this matching.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
-rw-r--r-- | net/ipv6/ip6_vti.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 8d189aa..6085793 100644 --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -376,6 +376,29 @@ vti6_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr) return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); } +static bool vti6_state_check(const struct xfrm_state *x, + const struct in6_addr *dst, + const struct in6_addr *src) +{ + xfrm_address_t *daddr = (xfrm_address_t *)dst; + xfrm_address_t *saddr = (xfrm_address_t *)src; + + /* if there is no transform then this tunnel is not functional. + * Or if the xfrm is not mode tunnel. + */ + if (!x || x->props.mode != XFRM_MODE_TUNNEL || + x->props.family != AF_INET6) + return false; + + if (ipv6_addr_any(dst)) + return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET6); + + if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET6)) + return false; + + return true; +} + /** * vti6_xmit - send a packet * @skb: the outgoing socket buffer @@ -402,7 +425,7 @@ vti6_xmit(struct sk_buff *skb, struct net_device *dev, struct flowi *fl) goto tx_err_link_failure; } - if (!dst->xfrm || dst->xfrm->props.mode != XFRM_MODE_TUNNEL) + if (!vti6_state_check(dst->xfrm, &t->parms.raddr, &t->parms.laddr)) goto tx_err_link_failure; tdev = dst->dev; |