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1da177e4 LT |
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 | ||
39 | #include <linux/config.h> | |
40 | #include <net/sock.h> | |
41 | #include <linux/ip.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 infomation 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 */ |