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32 * @(#)udp.h 8.1 (Berkeley) 6/10/93
36 #ifndef _NETINET_UDP_H_
37 #define _NETINET_UDP_H_
40 * UDP protocol header.
41 * Per RFC 768, September, 1981.
44 u_short uh_sport; /* source port */
45 u_short uh_dport; /* destination port */
46 u_short uh_ulen; /* udp length */
47 u_short uh_sum; /* udp checksum */
51 * User-settable options (used with setsockopt).
55 /* Start of reserved space for third-party user-settable options. */
56 #define UDP_VENDOR SO_VENDOR
59 * UDP Encapsulation of IPsec Packets options.
61 /* Encapsulation types. */
62 #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
63 #define UDP_ENCAP_ESPINUDP 2 /* RFC3948 */
65 /* Default ESP in UDP encapsulation port. */
66 #define UDP_ENCAP_ESPINUDP_PORT 500
68 /* Maximum UDP fragment size for ESP over UDP. */
69 #define UDP_ENCAP_ESPINUDP_MAXFRAGLEN 552