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120 lines
4.0 KiB
120 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* INET An implementation of the TCP/IP protocol suite for the LINUX |
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* operating system. INET is implemented using the BSD Socket |
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* interface as the means of communication with the user level. |
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* |
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* Definitions for the protocol dispatcher. |
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* |
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* Version: @(#)protocol.h 1.0.2 05/07/93 |
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* |
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* Author: Fred N. van Kempen, <[email protected]> |
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* |
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* Changes: |
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* Alan Cox : Added a name field and a frag handler |
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* field for later. |
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* Alan Cox : Cleaned up, and sorted types. |
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* Pedro Roque : inet6 protocols |
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*/ |
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#ifndef _PROTOCOL_H |
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#define _PROTOCOL_H |
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#include <linux/in6.h> |
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#include <linux/skbuff.h> |
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#if IS_ENABLED(CONFIG_IPV6) |
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#include <linux/ipv6.h> |
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#endif |
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#include <linux/netdevice.h> |
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/* This is one larger than the largest protocol value that can be |
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* found in an ipv4 or ipv6 header. Since in both cases the protocol |
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* value is presented in a __u8, this is defined to be 256. |
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*/ |
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#define MAX_INET_PROTOS 256 |
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/* This is used to register protocols. */ |
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struct net_protocol { |
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int (*early_demux)(struct sk_buff *skb); |
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int (*early_demux_handler)(struct sk_buff *skb); |
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int (*handler)(struct sk_buff *skb); |
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/* This returns an error if we weren't able to handle the error. */ |
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int (*err_handler)(struct sk_buff *skb, u32 info); |
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unsigned int no_policy:1, |
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/* does the protocol do more stringent |
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* icmp tag validation than simple |
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* socket lookup? |
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*/ |
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icmp_strict_tag_validation:1; |
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}; |
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#if IS_ENABLED(CONFIG_IPV6) |
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struct inet6_protocol { |
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void (*early_demux)(struct sk_buff *skb); |
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void (*early_demux_handler)(struct sk_buff *skb); |
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int (*handler)(struct sk_buff *skb); |
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/* This returns an error if we weren't able to handle the error. */ |
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int (*err_handler)(struct sk_buff *skb, |
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struct inet6_skb_parm *opt, |
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u8 type, u8 code, int offset, |
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__be32 info); |
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unsigned int flags; /* INET6_PROTO_xxx */ |
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}; |
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#define INET6_PROTO_NOPOLICY 0x1 |
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#define INET6_PROTO_FINAL 0x2 |
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#endif |
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struct net_offload { |
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struct offload_callbacks callbacks; |
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unsigned int flags; /* Flags used by IPv6 for now */ |
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}; |
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/* This should be set for any extension header which is compatible with GSO. */ |
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#define INET6_PROTO_GSO_EXTHDR 0x1 |
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/* This is used to register socket interfaces for IP protocols. */ |
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struct inet_protosw { |
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struct list_head list; |
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/* These two fields form the lookup key. */ |
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unsigned short type; /* This is the 2nd argument to socket(2). */ |
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unsigned short protocol; /* This is the L4 protocol number. */ |
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struct proto *prot; |
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const struct proto_ops *ops; |
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unsigned char flags; /* See INET_PROTOSW_* below. */ |
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}; |
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#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ |
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#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ |
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#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ |
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extern struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS]; |
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extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS]; |
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extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS]; |
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#if IS_ENABLED(CONFIG_IPV6) |
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extern struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS]; |
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#endif |
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int inet_add_protocol(const struct net_protocol *prot, unsigned char num); |
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int inet_del_protocol(const struct net_protocol *prot, unsigned char num); |
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int inet_add_offload(const struct net_offload *prot, unsigned char num); |
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int inet_del_offload(const struct net_offload *prot, unsigned char num); |
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void inet_register_protosw(struct inet_protosw *p); |
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void inet_unregister_protosw(struct inet_protosw *p); |
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#if IS_ENABLED(CONFIG_IPV6) |
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int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num); |
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int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num); |
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int inet6_register_protosw(struct inet_protosw *p); |
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void inet6_unregister_protosw(struct inet_protosw *p); |
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#endif |
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int inet6_add_offload(const struct net_offload *prot, unsigned char num); |
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int inet6_del_offload(const struct net_offload *prot, unsigned char num); |
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#endif /* _PROTOCOL_H */
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