#include "flow_class.h"#include "flow_error.h"/**  * Find the relevant flow processing scheme for a packet *  * @param p packet to find the flow scheme for *  * @return 0 on success, 1 on failure */int flow_classifier(FLOWPACKET *p, int *flowtype){    if(p == NULL)    {        return FLOW_ENULL;    }    if(IsIPv4Packet(p))    {        *flowtype = FLOW_IPV4;                    return FLOW_SUCCESS;    }    return FLOW_EINVALID;}