ike-rekey: Add method to check if there was a rekey collision
[strongswan.git] / src / include / linux / udp.h
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the UDP protocol.
7 *
8 * Version: @(#)udp.h 1.0.2 04/28/93
9 *
10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17 #ifndef _LINUX_UDP_H
18 #define _LINUX_UDP_H
19
20 #include <linux/types.h>
21
22 struct udphdr {
23 __u16 source;
24 __u16 dest;
25 __u16 len;
26 __u16 check;
27 };
28
29 /* UDP socket options */
30 #define UDP_CORK 1 /* Never send partially complete segments */
31 #define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */
32
33 /* UDP encapsulation types */
34 #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
35 #define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
36
37 #ifdef __KERNEL__
38 #include <linux/config.h>
39 #include <linux/types.h>
40
41 #include <net/inet_sock.h>
42
43 struct udp_sock {
44 /* inet_sock has to be the first member */
45 struct inet_sock inet;
46 int pending; /* Any pending frames ? */
47 unsigned int corkflag; /* Cork is required */
48 __u16 encap_type; /* Is this an Encapsulation socket? */
49 /*
50 * Following member retains the information to create a UDP header
51 * when the socket is uncorked.
52 */
53 __u16 len; /* total length of pending frames */
54 };
55
56 static __inline__ struct udp_sock *udp_sk(const struct sock *sk)
57 {
58 return (struct udp_sock *)sk;
59 }
60
61 #endif
62
63 #endif /* _LINUX_UDP_H */