projects / deliverable / linux.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 | ||
| 4bedb452 ACM |
29 | #ifdef __KERNEL__ |
| 30 | #include <linux/skbuff.h> | |
| 31 | ||
| 32 | static inline struct udphdr *udp_hdr(const struct sk_buff *skb) | |
| 33 | { | |
| 9c70220b | 34 | return (struct udphdr *)skb_transport_header(skb); |
| 4bedb452 ACM |
35 | } |
| 36 | #endif | |
| 37 | ||
| 1da177e4 LT |
38 | /* UDP socket options */ |
| 39 | #define UDP_CORK 1 /* Never send partially complete segments */ | |
| 40 | #define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */ | |
| 41 | ||
| 42 | /* UDP encapsulation types */ | |
| 43 | #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */ | |
| 44 | #define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */ | |
| 342f0234 | 45 | #define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */ |
| 1da177e4 LT |
46 | |
| 47 | #ifdef __KERNEL__ | |
| 14c85021 ACM |
48 | #include <linux/types.h> |
| 49 | ||
| 50 | #include <net/inet_sock.h> | |
| ba4e58ec | 51 | #define UDP_HTABLE_SIZE 128 |
| 1da177e4 LT |
52 | |
| 53 | struct udp_sock { | |
| 54 | /* inet_sock has to be the first member */ | |
| 55 | struct inet_sock inet; | |
| 56 | int pending; /* Any pending frames ? */ | |
| 57 | unsigned int corkflag; /* Cork is required */ | |
| 58 | __u16 encap_type; /* Is this an Encapsulation socket? */ | |
| 59 | /* | |
| 47bdd718 | 60 | * Following member retains the information to create a UDP header |
| 1da177e4 LT |
61 | * when the socket is uncorked. |
| 62 | */ | |
| 63 | __u16 len; /* total length of pending frames */ | |
| ba4e58ec GR |
64 | /* |
| 65 | * Fields specific to UDP-Lite. | |
| 66 | */ | |
| 67 | __u16 pcslen; | |
| 68 | __u16 pcrlen; | |
| 69 | /* indicator bits used by pcflag: */ | |
| 70 | #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ | |
| 71 | #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ | |
| 72 | #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ | |
| 73 | __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ | |
| 342f0234 JC |
74 | __u8 unused[3]; |
| 75 | /* | |
| 76 | * For encapsulation sockets. | |
| 77 | */ | |
| 78 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
| 1da177e4 LT |
79 | }; |
| 80 | ||
| 81 | static inline struct udp_sock *udp_sk(const struct sock *sk) | |
| 82 | { | |
| 83 | return (struct udp_sock *)sk; | |
| 84 | } | |
| ba4e58ec | 85 | #define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag) |
| 1da177e4 LT |
86 | |
| 87 | #endif | |
| 88 | ||
| 89 | #endif /* _LINUX_UDP_H */ |