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17#ifndef _LINUX_UDP_H
18#define _LINUX_UDP_H
19
20#include <net/inet_sock.h>
21#include <linux/skbuff.h>
22#include <net/netns/hash.h>
23#include <uapi/linux/udp.h>
24
25static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
26{
27 return (struct udphdr *)skb_transport_header(skb);
28}
29
30static inline struct udphdr *inner_udp_hdr(const struct sk_buff *skb)
31{
32 return (struct udphdr *)skb_inner_transport_header(skb);
33}
34
35#define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256)
36
37static inline u32 udp_hashfn(const struct net *net, u32 num, u32 mask)
38{
39 return (num + net_hash_mix(net)) & mask;
40}
41
42struct udp_sock {
43
44 struct inet_sock inet;
45#define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0]
46#define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1]
47#define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node
48 int pending;
49 unsigned int corkflag;
50 __u8 encap_type;
51 unsigned char no_check6_tx:1,
52 no_check6_rx:1;
53
54
55
56
57 __u16 len;
58
59
60
61 __u16 pcslen;
62 __u16 pcrlen;
63
64#define UDPLITE_BIT 0x1
65#define UDPLITE_SEND_CC 0x2
66#define UDPLITE_RECV_CC 0x4
67 __u8 pcflag;
68 __u8 unused[3];
69
70
71
72 int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
73 void (*encap_destroy)(struct sock *sk);
74};
75
76static inline struct udp_sock *udp_sk(const struct sock *sk)
77{
78 return (struct udp_sock *)sk;
79}
80
81static inline void udp_set_no_check6_tx(struct sock *sk, bool val)
82{
83 udp_sk(sk)->no_check6_tx = val;
84}
85
86static inline void udp_set_no_check6_rx(struct sock *sk, bool val)
87{
88 udp_sk(sk)->no_check6_rx = val;
89}
90
91static inline bool udp_get_no_check6_tx(struct sock *sk)
92{
93 return udp_sk(sk)->no_check6_tx;
94}
95
96static inline bool udp_get_no_check6_rx(struct sock *sk)
97{
98 return udp_sk(sk)->no_check6_rx;
99}
100
101#define udp_portaddr_for_each_entry(__sk, node, list) \
102 hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node)
103
104#define udp_portaddr_for_each_entry_rcu(__sk, node, list) \
105 hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node)
106
107#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
108
109#endif
110