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/
usr/
src/
linux-headers-3.0.0-14-generic-pae/
include/
linux/
- drwxr-xr-x
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Viewing file: udp.h (3.03 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * 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 { __be16 source; __be16 dest; __be16 len; __sum16 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 */ #define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
#ifdef __KERNEL__ #include <net/inet_sock.h> #include <linux/skbuff.h> #include <net/netns/hash.h>
static inline struct udphdr *udp_hdr(const struct sk_buff *skb) { return (struct udphdr *)skb_transport_header(skb); }
#define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256)
static inline int udp_hashfn(struct net *net, unsigned num, unsigned mask) { return (num + net_hash_mix(net)) & mask; }
struct udp_sock { /* inet_sock has to be the first member */ struct inet_sock inet; #define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0] #define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1] #define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node int pending; /* Any pending frames ? */ unsigned int corkflag; /* Cork is required */ __u16 encap_type; /* Is this an Encapsulation socket? */ /* * Following member retains the information to create a UDP header * when the socket is uncorked. */ __u16 len; /* total length of pending frames */ /* * Fields specific to UDP-Lite. */ __u16 pcslen; __u16 pcrlen; /* indicator bits used by pcflag: */ #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ __u8 unused[3]; /* * For encapsulation sockets. */ int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); };
static inline struct udp_sock *udp_sk(const struct sock *sk) { return (struct udp_sock *)sk; }
#define udp_portaddr_for_each_entry(__sk, node, list) \ hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node)
#define udp_portaddr_for_each_entry_rcu(__sk, node, list) \ hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node)
#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
#endif
#endif /* _LINUX_UDP_H */
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