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20#ifndef _PROTOCOL_H
21#define _PROTOCOL_H
22
23#include <linux/in6.h>
24#include <linux/skbuff.h>
25#if IS_ENABLED(CONFIG_IPV6)
26#include <linux/ipv6.h>
27#endif
28#include <linux/netdevice.h>
29
30
31
32
33
34#define MAX_INET_PROTOS 256
35
36
37struct net_protocol {
38 int (*early_demux)(struct sk_buff *skb);
39 int (*early_demux_handler)(struct sk_buff *skb);
40 int (*handler)(struct sk_buff *skb);
41
42
43 int (*err_handler)(struct sk_buff *skb, u32 info);
44
45 unsigned int no_policy:1,
46 netns_ok:1,
47
48
49
50
51 icmp_strict_tag_validation:1;
52};
53
54#if IS_ENABLED(CONFIG_IPV6)
55struct inet6_protocol {
56 void (*early_demux)(struct sk_buff *skb);
57 void (*early_demux_handler)(struct sk_buff *skb);
58 int (*handler)(struct sk_buff *skb);
59
60
61 int (*err_handler)(struct sk_buff *skb,
62 struct inet6_skb_parm *opt,
63 u8 type, u8 code, int offset,
64 __be32 info);
65
66 unsigned int flags;
67};
68
69#define INET6_PROTO_NOPOLICY 0x1
70#define INET6_PROTO_FINAL 0x2
71#endif
72
73struct net_offload {
74 struct offload_callbacks callbacks;
75 unsigned int flags;
76};
77
78#define INET6_PROTO_GSO_EXTHDR 0x1
79
80
81struct inet_protosw {
82 struct list_head list;
83
84
85 unsigned short type;
86 unsigned short protocol;
87
88 struct proto *prot;
89 const struct proto_ops *ops;
90
91 unsigned char flags;
92};
93#define INET_PROTOSW_REUSE 0x01
94#define INET_PROTOSW_PERMANENT 0x02
95#define INET_PROTOSW_ICSK 0x04
96
97extern struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
98extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS];
99extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS];
100
101#if IS_ENABLED(CONFIG_IPV6)
102extern struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
103#endif
104
105int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
106int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
107int inet_add_offload(const struct net_offload *prot, unsigned char num);
108int inet_del_offload(const struct net_offload *prot, unsigned char num);
109void inet_register_protosw(struct inet_protosw *p);
110void inet_unregister_protosw(struct inet_protosw *p);
111
112#if IS_ENABLED(CONFIG_IPV6)
113int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
114int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
115int inet6_register_protosw(struct inet_protosw *p);
116void inet6_unregister_protosw(struct inet_protosw *p);
117#endif
118int inet6_add_offload(const struct net_offload *prot, unsigned char num);
119int inet6_del_offload(const struct net_offload *prot, unsigned char num);
120
121#endif
122