xfrm4_protocol 1360 include/net/xfrm.h struct xfrm4_protocol __rcu *next; xfrm4_protocol 1533 include/net/xfrm.h int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); xfrm4_protocol 1534 include/net/xfrm.h int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);