projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 { | |
| 4e7e0c75 AV |
23 | __be16 source; |
| 24 | __be16 dest; | |
| 25 | __be16 len; | |
| 9981a0e3 | 26 | __sum16 check; |
| 1da177e4 LT |
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 */ | |
| 342f0234 | 36 | #define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */ |
| 1da177e4 LT |
37 | |
| 38 | #ifdef __KERNEL__ | |
| 14c85021 | 39 | #include <net/inet_sock.h> |
| 310afe86 JP |
40 | #include <linux/skbuff.h> |
| 41 | ||
| 42 | static inline struct udphdr *udp_hdr(const struct sk_buff *skb) | |
| 43 | { | |
| 44 | return (struct udphdr *)skb_transport_header(skb); | |
| 45 | } | |
| 46 | ||
| ba4e58ec | 47 | #define UDP_HTABLE_SIZE 128 |
| 1da177e4 LT |
48 | |
| 49 | struct udp_sock { | |
| 50 | /* inet_sock has to be the first member */ | |
| 51 | struct inet_sock inet; | |
| 52 | int pending; /* Any pending frames ? */ | |
| 53 | unsigned int corkflag; /* Cork is required */ | |
| 54 | __u16 encap_type; /* Is this an Encapsulation socket? */ | |
| 55 | /* | |
| 47bdd718 | 56 | * Following member retains the information to create a UDP header |
| 1da177e4 LT |
57 | * when the socket is uncorked. |
| 58 | */ | |
| 59 | __u16 len; /* total length of pending frames */ | |
| ba4e58ec GR |
60 | /* |
| 61 | * Fields specific to UDP-Lite. | |
| 62 | */ | |
| 63 | __u16 pcslen; | |
| 64 | __u16 pcrlen; | |
| 65 | /* indicator bits used by pcflag: */ | |
| 66 | #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ | |
| 67 | #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ | |
| 68 | #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ | |
| 69 | __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ | |
| 342f0234 JC |
70 | __u8 unused[3]; |
| 71 | /* | |
| 72 | * For encapsulation sockets. | |
| 73 | */ | |
| 74 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
| 1da177e4 LT |
75 | }; |
| 76 | ||
| 77 | static inline struct udp_sock *udp_sk(const struct sock *sk) | |
| 78 | { | |
| 79 | return (struct udp_sock *)sk; | |
| 80 | } | |
| e898d4db | 81 | |
| ba4e58ec | 82 | #define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag) |
| 1da177e4 LT |
83 | |
| 84 | #endif | |
| 85 | ||
| 86 | #endif /* _LINUX_UDP_H */ |