xfrm_usersa_flush
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
struct xfrm_usersa_flush *p = nlmsg_data(nlh);
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
struct xfrm_usersa_flush *p;
int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));