xfrm_policy_check 997 include/net/xfrm.h return xfrm_policy_check(sk, dir, skb, AF_INET); xfrm_policy_check 1002 include/net/xfrm.h return xfrm_policy_check(sk, dir, skb, AF_INET6); xfrm_policy_check 221 net/sctp/input.c if (!xfrm_policy_check(sk, XFRM_POLICY_IN, skb, family))