db8dac20d5
This reverts commitdb1ed684f6("[IPV6] UDP: Rename IPv6 UDP files."), commit8be8af8fa4("[IPV4] UDP: Move IPv4-specific bits to other file.") and commite898d4db27("[UDP]: Allow users to configure UDP-Lite."). First, udplite is of such small cost, and it is a core protocol just like TCP and normal UDP are. We spent enormous amounts of effort to make udplite share as much code with core UDP as possible. All of that work is less valuable if we're just going to slap a config option on udplite support. It is also causing build failures, as reported on linux-next, showing that the changeset was not tested very well. In fact, this is the second build failure resulting from the udplite change. Finally, the config options provided was a bool, instead of a modular option. Meaning the udplite code does not even get build tested by allmodconfig builds, and furthermore the user is not presented with a reasonable modular build option which is particularly needed by distribution vendors. Signed-off-by: David S. Miller <davem@davemloft.net>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the UDP protocol.
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*
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* Version: @(#)udp.h 1.0.2 04/28/93
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*
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* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_UDP_H
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#define _LINUX_UDP_H
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#include <linux/types.h>
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struct udphdr {
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__be16 source;
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__be16 dest;
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__be16 len;
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__sum16 check;
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};
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#ifdef __KERNEL__
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#include <linux/skbuff.h>
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static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
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{
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return (struct udphdr *)skb_transport_header(skb);
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}
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#endif
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/* UDP socket options */
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#define UDP_CORK 1 /* Never send partially complete segments */
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#define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */
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/* UDP encapsulation types */
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#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
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#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
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#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <net/inet_sock.h>
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#define UDP_HTABLE_SIZE 128
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struct udp_sock {
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/* inet_sock has to be the first member */
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struct inet_sock inet;
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int pending; /* Any pending frames ? */
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unsigned int corkflag; /* Cork is required */
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__u16 encap_type; /* Is this an Encapsulation socket? */
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/*
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* Following member retains the information to create a UDP header
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* when the socket is uncorked.
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*/
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__u16 len; /* total length of pending frames */
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/*
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* Fields specific to UDP-Lite.
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*/
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__u16 pcslen;
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__u16 pcrlen;
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/* indicator bits used by pcflag: */
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#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
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#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
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#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
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__u8 pcflag; /* marks socket as UDP-Lite if > 0 */
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__u8 unused[3];
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/*
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* For encapsulation sockets.
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*/
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int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
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};
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static inline struct udp_sock *udp_sk(const struct sock *sk)
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{
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return (struct udp_sock *)sk;
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}
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#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
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#endif
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#endif /* _LINUX_UDP_H */
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