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 | ||
| 14c85021 | 20 | #include <net/inet_sock.h> |
| 310afe86 | 21 | #include <linux/skbuff.h> |
| 0b441916 | 22 | #include <net/netns/hash.h> |
| 607ca46e | 23 | #include <uapi/linux/udp.h> |
| 310afe86 JP |
24 | |
| 25 | static inline struct udphdr *udp_hdr(const struct sk_buff *skb) | |
| 26 | { | |
| 27 | return (struct udphdr *)skb_transport_header(skb); | |
| 28 | } | |
| 29 | ||
| f86dcc5a | 30 | #define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256) |
| 1da177e4 | 31 | |
| f86dcc5a | 32 | static inline int udp_hashfn(struct net *net, unsigned num, unsigned mask) |
| d6266281 | 33 | { |
| f86dcc5a | 34 | return (num + net_hash_mix(net)) & mask; |
| d6266281 PE |
35 | } |
| 36 | ||
| 1da177e4 LT |
37 | struct udp_sock { |
| 38 | /* inet_sock has to be the first member */ | |
| 39 | struct inet_sock inet; | |
| d4cada4a ED |
40 | #define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0] |
| 41 | #define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1] | |
| 512615b6 | 42 | #define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node |
| 1da177e4 LT |
43 | int pending; /* Any pending frames ? */ |
| 44 | unsigned int corkflag; /* Cork is required */ | |
| 45 | __u16 encap_type; /* Is this an Encapsulation socket? */ | |
| 46 | /* | |
| 47bdd718 | 47 | * Following member retains the information to create a UDP header |
| 1da177e4 LT |
48 | * when the socket is uncorked. |
| 49 | */ | |
| 50 | __u16 len; /* total length of pending frames */ | |
| ba4e58ec GR |
51 | /* |
| 52 | * Fields specific to UDP-Lite. | |
| 53 | */ | |
| 54 | __u16 pcslen; | |
| 55 | __u16 pcrlen; | |
| 56 | /* indicator bits used by pcflag: */ | |
| 57 | #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ | |
| 58 | #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ | |
| 59 | #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ | |
| 60 | __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ | |
| 342f0234 JC |
61 | __u8 unused[3]; |
| 62 | /* | |
| 63 | * For encapsulation sockets. | |
| 64 | */ | |
| 65 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
| 1da177e4 LT |
66 | }; |
| 67 | ||
| 68 | static inline struct udp_sock *udp_sk(const struct sock *sk) | |
| 69 | { | |
| 70 | return (struct udp_sock *)sk; | |
| 71 | } | |
| e898d4db | 72 | |
| 30fff923 ED |
73 | #define udp_portaddr_for_each_entry(__sk, node, list) \ |
| 74 | hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node) | |
| 75 | ||
| 76 | #define udp_portaddr_for_each_entry_rcu(__sk, node, list) \ | |
| 77 | hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node) | |
| 78 | ||
| ba4e58ec | 79 | #define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag) |
| 1da177e4 | 80 | |
| 1da177e4 | 81 | #endif /* _LINUX_UDP_H */ |