1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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 int udp_hashfn(struct net *net, unsigned num, unsigned 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 __u16 encap_type;
51
52
53
54
55 __u16 len;
56
57
58
59 __u16 pcslen;
60 __u16 pcrlen;
61
62#define UDPLITE_BIT 0x1
63#define UDPLITE_SEND_CC 0x2
64#define UDPLITE_RECV_CC 0x4
65 __u8 pcflag;
66 __u8 unused[3];
67
68
69
70 int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
71 void (*encap_destroy)(struct sock *sk);
72};
73
74static inline struct udp_sock *udp_sk(const struct sock *sk)
75{
76 return (struct udp_sock *)sk;
77}
78
79#define udp_portaddr_for_each_entry(__sk, node, list) \
80 hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node)
81
82#define udp_portaddr_for_each_entry_rcu(__sk, node, list) \
83 hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node)
84
85#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
86
87#endif
88