| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-3-Clause |
| 3 | * |
| 4 | * Copyright (c) 1982, 1986, 1993 |
| 5 | * The Regents of the University of California. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #ifndef _NETINET_UDP_H_ |
| 34 | #define _NETINET_UDP_H_ |
| 35 | |
| 36 | #include <sys/types.h> |
| 37 | |
| 38 | /* |
| 39 | * UDP protocol header. |
| 40 | * Per RFC 768, September, 1981. |
| 41 | */ |
| 42 | struct udphdr { |
| 43 | u_short uh_sport; /* source port */ |
| 44 | u_short uh_dport; /* destination port */ |
| 45 | u_short uh_ulen; /* udp length */ |
| 46 | u_short uh_sum; /* udp checksum */ |
| 47 | } __packed; |
| 48 | |
| 49 | /* |
| 50 | * User-settable options (used with setsockopt). |
| 51 | */ |
| 52 | #define UDP_ENCAP 1 |
| 53 | |
| 54 | /* Start of reserved space for third-party user-settable options. */ |
| 55 | #define UDP_VENDOR SO_VENDOR |
| 56 | |
| 57 | /* |
| 58 | * UDP Encapsulation of IPsec Packets options. |
| 59 | */ |
| 60 | /* Encapsulation types. */ |
| 61 | #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */ |
| 62 | #define UDP_ENCAP_ESPINUDP 2 /* RFC3948 */ |
| 63 | |
| 64 | /* Default ESP in UDP encapsulation port. */ |
| 65 | #define UDP_ENCAP_ESPINUDP_PORT 500 |
| 66 | |
| 67 | /* Maximum UDP fragment size for ESP over UDP. */ |
| 68 | #define UDP_ENCAP_ESPINUDP_MAXFRAGLEN 552 |
| 69 | |
| 70 | #endif |