udp.h
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上传日期:2009-04-28
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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Definitions for the UDP protocol.
- *
- * Version: @(#)udp.h 1.0.2 04/28/93
- *
- * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _LINUX_UDP_H
- #define _LINUX_UDP_H
- #include <linux/types.h>
- struct udphdr {
- __u16 source;
- __u16 dest;
- __u16 len;
- __u16 check;
- };
- /* UDP socket options */
- #define UDP_CORK 1 /* Never send partially complete segments */
- #define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */
- /* UDP encapsulation types */
- #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
- #define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
- #ifdef __KERNEL__
- #include <linux/config.h>
- #include <net/sock.h>
- #include <linux/ip.h>
- struct udp_sock {
- /* inet_sock has to be the first member */
- struct inet_sock inet;
- int pending; /* Any pending frames ? */
- unsigned int corkflag; /* Cork is required */
- __u16 encap_type; /* Is this an Encapsulation socket? */
- /*
- * Following member retains the infomation to create a UDP header
- * when the socket is uncorked.
- */
- __u16 len; /* total length of pending frames */
- };
- static inline struct udp_sock *udp_sk(const struct sock *sk)
- {
- return (struct udp_sock *)sk;
- }
- #endif
- #endif /* _LINUX_UDP_H */