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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 */ | |
45 | ||
46 | #ifdef __KERNEL__ | |
14c85021 ACM |
47 | #include <linux/types.h> |
48 | ||
49 | #include <net/inet_sock.h> | |
ba4e58ec | 50 | #define UDP_HTABLE_SIZE 128 |
1da177e4 LT |
51 | |
52 | struct udp_sock { | |
53 | /* inet_sock has to be the first member */ | |
54 | struct inet_sock inet; | |
55 | int pending; /* Any pending frames ? */ | |
56 | unsigned int corkflag; /* Cork is required */ | |
57 | __u16 encap_type; /* Is this an Encapsulation socket? */ | |
58 | /* | |
47bdd718 | 59 | * Following member retains the information to create a UDP header |
1da177e4 LT |
60 | * when the socket is uncorked. |
61 | */ | |
62 | __u16 len; /* total length of pending frames */ | |
ba4e58ec GR |
63 | /* |
64 | * Fields specific to UDP-Lite. | |
65 | */ | |
66 | __u16 pcslen; | |
67 | __u16 pcrlen; | |
68 | /* indicator bits used by pcflag: */ | |
69 | #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ | |
70 | #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ | |
71 | #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ | |
72 | __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ | |
1da177e4 LT |
73 | }; |
74 | ||
75 | static inline struct udp_sock *udp_sk(const struct sock *sk) | |
76 | { | |
77 | return (struct udp_sock *)sk; | |
78 | } | |
ba4e58ec | 79 | #define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag) |
1da177e4 LT |
80 | |
81 | #endif | |
82 | ||
83 | #endif /* _LINUX_UDP_H */ |