projects / 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, <[email protected]> | |
| 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 | ||
| 6a674e9c JG |
30 | static inline struct udphdr *inner_udp_hdr(const struct sk_buff *skb) |
| 31 | { | |
| 32 | return (struct udphdr *)skb_inner_transport_header(skb); | |
| 33 | } | |
| 34 | ||
| f86dcc5a | 35 | #define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256) |
| 1da177e4 | 36 | |
| 6eada011 | 37 | static inline u32 udp_hashfn(const struct net *net, u32 num, u32 mask) |
| d6266281 | 38 | { |
| f86dcc5a | 39 | return (num + net_hash_mix(net)) & mask; |
| d6266281 PE |
40 | } |
| 41 | ||
| 1da177e4 LT |
42 | struct udp_sock { |
| 43 | /* inet_sock has to be the first member */ | |
| 44 | struct inet_sock inet; | |
| d4cada4a ED |
45 | #define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0] |
| 46 | #define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1] | |
| 512615b6 | 47 | #define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node |
| 1da177e4 LT |
48 | int pending; /* Any pending frames ? */ |
| 49 | unsigned int corkflag; /* Cork is required */ | |
| 1c19448c TH |
50 | __u8 encap_type; /* Is this an Encapsulation socket? */ |
| 51 | unsigned char no_check6_tx:1,/* Send zero UDP6 checksums on TX? */ | |
| 224d019c | 52 | no_check6_rx:1;/* Allow zero UDP6 checksums on RX? */ |
| 1da177e4 | 53 | /* |
| 47bdd718 | 54 | * Following member retains the information to create a UDP header |
| 1da177e4 LT |
55 | * when the socket is uncorked. |
| 56 | */ | |
| 57 | __u16 len; /* total length of pending frames */ | |
| bec1f6f6 | 58 | __u16 gso_size; |
| ba4e58ec GR |
59 | /* |
| 60 | * Fields specific to UDP-Lite. | |
| 61 | */ | |
| 62 | __u16 pcslen; | |
| 63 | __u16 pcrlen; | |
| 64 | /* indicator bits used by pcflag: */ | |
| 65 | #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ | |
| 66 | #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ | |
| 67 | #define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */ | |
| 68 | __u8 pcflag; /* marks socket as UDP-Lite if > 0 */ | |
| 342f0234 JC |
69 | __u8 unused[3]; |
| 70 | /* | |
| 71 | * For encapsulation sockets. | |
| 72 | */ | |
| 73 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
| 44046a59 | 74 | void (*encap_destroy)(struct sock *sk); |
| a6024562 TH |
75 | |
| 76 | /* GRO functions for UDP socket */ | |
| d4546c25 DM |
77 | struct sk_buff * (*gro_receive)(struct sock *sk, |
| 78 | struct list_head *head, | |
| a6024562 TH |
79 | struct sk_buff *skb); |
| 80 | int (*gro_complete)(struct sock *sk, | |
| 81 | struct sk_buff *skb, | |
| 82 | int nhoff); | |
| 6b229cf7 | 83 | |
| 2276f58a PA |
84 | /* udp_recvmsg try to use this before splicing sk_receive_queue */ |
| 85 | struct sk_buff_head reader_queue ____cacheline_aligned_in_smp; | |
| 86 | ||
| 6b229cf7 ED |
87 | /* This field is dirtied by udp_recvmsg() */ |
| 88 | int forward_deficit; | |
| 1da177e4 LT |
89 | }; |
| 90 | ||
| bec1f6f6 WB |
91 | #define UDP_MAX_SEGMENTS (1 << 6UL) |
| 92 | ||
| 1da177e4 LT |
93 | static inline struct udp_sock *udp_sk(const struct sock *sk) |
| 94 | { | |
| 95 | return (struct udp_sock *)sk; | |
| 96 | } | |
| e898d4db | 97 | |
| 1c19448c TH |
98 | static inline void udp_set_no_check6_tx(struct sock *sk, bool val) |
| 99 | { | |
| 100 | udp_sk(sk)->no_check6_tx = val; | |
| 101 | } | |
| 102 | ||
| 103 | static inline void udp_set_no_check6_rx(struct sock *sk, bool val) | |
| 104 | { | |
| 105 | udp_sk(sk)->no_check6_rx = val; | |
| 106 | } | |
| 107 | ||
| 108 | static inline bool udp_get_no_check6_tx(struct sock *sk) | |
| 109 | { | |
| 110 | return udp_sk(sk)->no_check6_tx; | |
| 111 | } | |
| 112 | ||
| 113 | static inline bool udp_get_no_check6_rx(struct sock *sk) | |
| 114 | { | |
| 115 | return udp_sk(sk)->no_check6_rx; | |
| 116 | } | |
| 117 | ||
| ca065d0c ED |
118 | #define udp_portaddr_for_each_entry(__sk, list) \ |
| 119 | hlist_for_each_entry(__sk, list, __sk_common.skc_portaddr_node) | |
| 30fff923 | 120 | |
| ca065d0c ED |
121 | #define udp_portaddr_for_each_entry_rcu(__sk, list) \ |
| 122 | hlist_for_each_entry_rcu(__sk, list, __sk_common.skc_portaddr_node) | |
| 30fff923 | 123 | |
| 3d8417d7 | 124 | #define IS_UDPLITE(__sk) (__sk->sk_protocol == IPPROTO_UDPLITE) |
| 1da177e4 | 125 | |
| 1da177e4 | 126 | #endif /* _LINUX_UDP_H */ |