#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>
#include <stdint.h>

#ifdef _GNU_SOURCE
#define uh_sport source
#define uh_dport dest
#define uh_ulen len
#define uh_sum check
#endif

struct udphdr {
    uint16_t uh_sport;
    uint16_t uh_dport;
    uint16_t uh_ulen;
    uint16_t uh_sum;
};

#define UDP_CORK 1
#define UDP_ENCAP 100

#define UDP_ENCAP_ESPINUDP_NON_IKE 1
#define UDP_ENCAP_ESPINUDP 2
#define UDP_ENCAP_L2TPINUDP 3

#define SOL_UDP 17

#ifdef __cplusplus
}
#endif