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 (at) 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/types.h> 39 40 #include <net/inet_sock.h> 41 42 struct udp_sock { 43 /* inet_sock has to be the first member */ 44 struct inet_sock inet; 45 int pending; /* Any pending frames ? */ 46 unsigned int corkflag; /* Cork is required */ 47 __u16 encap_type; /* Is this an Encapsulation socket? */ 48 /* 49 * Following member retains the information to create a UDP header 50 * when the socket is uncorked. 51 */ 52 __u16 len; /* total length of pending frames */ 53 }; 54 55 static inline struct udp_sock *udp_sk(const struct sock *sk) 56 { 57 return (struct udp_sock *)sk; 58 } 59 60 #endif 61 62 #endif /* _LINUX_UDP_H */ 63
