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