cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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protocol.h (4093B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * INET		An implementation of the TCP/IP protocol suite for the LINUX
      4 *		operating system.  INET is implemented using the  BSD Socket
      5 *		interface as the means of communication with the user level.
      6 *
      7 *		Definitions for the protocol dispatcher.
      8 *
      9 * Version:	@(#)protocol.h	1.0.2	05/07/93
     10 *
     11 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
     12 *
     13 *	Changes:
     14 *		Alan Cox	:	Added a name field and a frag handler
     15 *					field for later.
     16 *		Alan Cox	:	Cleaned up, and sorted types.
     17 *		Pedro Roque	:	inet6 protocols
     18 */
     19 
     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/* This is one larger than the largest protocol value that can be
     31 * found in an ipv4 or ipv6 header.  Since in both cases the protocol
     32 * value is presented in a __u8, this is defined to be 256.
     33 */
     34#define MAX_INET_PROTOS		256
     35
     36/* This is used to register protocols. */
     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	/* This returns an error if we weren't able to handle the error. */
     43	int			(*err_handler)(struct sk_buff *skb, u32 info);
     44
     45	unsigned int		no_policy:1,
     46				/* does the protocol do more stringent
     47				 * icmp tag validation than simple
     48				 * socket lookup?
     49				 */
     50				icmp_strict_tag_validation:1;
     51};
     52
     53#if IS_ENABLED(CONFIG_IPV6)
     54struct inet6_protocol {
     55	void	(*early_demux)(struct sk_buff *skb);
     56	void    (*early_demux_handler)(struct sk_buff *skb);
     57	int	(*handler)(struct sk_buff *skb);
     58
     59	/* This returns an error if we weren't able to handle the error. */
     60	int	(*err_handler)(struct sk_buff *skb,
     61			       struct inet6_skb_parm *opt,
     62			       u8 type, u8 code, int offset,
     63			       __be32 info);
     64
     65	unsigned int	flags;	/* INET6_PROTO_xxx */
     66};
     67
     68#define INET6_PROTO_NOPOLICY	0x1
     69#define INET6_PROTO_FINAL	0x2
     70#endif
     71
     72struct net_offload {
     73	struct offload_callbacks callbacks;
     74	unsigned int		 flags;	/* Flags used by IPv6 for now */
     75};
     76/* This should be set for any extension header which is compatible with GSO. */
     77#define INET6_PROTO_GSO_EXTHDR	0x1
     78
     79/* This is used to register socket interfaces for IP protocols.  */
     80struct inet_protosw {
     81	struct list_head list;
     82
     83        /* These two fields form the lookup key.  */
     84	unsigned short	 type;	   /* This is the 2nd argument to socket(2). */
     85	unsigned short	 protocol; /* This is the L4 protocol number.  */
     86
     87	struct proto	 *prot;
     88	const struct proto_ops *ops;
     89  
     90	unsigned char	 flags;      /* See INET_PROTOSW_* below.  */
     91};
     92#define INET_PROTOSW_REUSE 0x01	     /* Are ports automatically reusable? */
     93#define INET_PROTOSW_PERMANENT 0x02  /* Permanent protocols are unremovable. */
     94#define INET_PROTOSW_ICSK      0x04  /* Is this an inet_connection_sock? */
     95
     96extern struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
     97extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS];
     98extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS];
     99
    100#if IS_ENABLED(CONFIG_IPV6)
    101extern struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
    102#endif
    103
    104int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
    105int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
    106int inet_add_offload(const struct net_offload *prot, unsigned char num);
    107int inet_del_offload(const struct net_offload *prot, unsigned char num);
    108void inet_register_protosw(struct inet_protosw *p);
    109void inet_unregister_protosw(struct inet_protosw *p);
    110
    111#if IS_ENABLED(CONFIG_IPV6)
    112int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
    113int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
    114int inet6_register_protosw(struct inet_protosw *p);
    115void inet6_unregister_protosw(struct inet_protosw *p);
    116#endif
    117int inet6_add_offload(const struct net_offload *prot, unsigned char num);
    118int inet6_del_offload(const struct net_offload *prot, unsigned char num);
    119
    120#endif	/* _PROTOCOL_H */