linux-imx

/*

 * INET     An implementation of the TCP/IP protocol suite for the LINUX

 *      operating system.  INET is implemented using the  BSD Socket

 *      interface as the means of communication with the user level.

 *

 *      Definitions for the protocol dispatcher.

 *

 * Version: @(#)protocol.h  1.0.2   05/07/93

 *

 * Author:  Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 *

 *  Changes:

 *      Alan Cox    :   Added a name field and a frag handler

 *                  field for later.

 *      Alan Cox    :   Cleaned up, and sorted types.

 *      Pedro Roque :   inet6 protocols

 */

#ifndef _PROTOCOL_H

#define _PROTOCOL_H

​

#include <linux/in6.h>

#include <linux/skbuff.h>

#if IS_ENABLED(CONFIG_IPV6)

#include <linux/ipv6.h>

#endif

#include <linux/netdevice.h>

​

/* This is one larger than the largest protocol value that can be

 * found in an ipv4 or ipv6 header.  Since in both cases the protocol

 * value is presented in a __u8, this is defined to be 256.

 */

#define MAX_INET_PROTOS     256

​

/* This is used to register protocols. */

struct net_protocol {

    int         (*early_demux)(struct sk_buff *skb);

    int         (*early_demux_handler)(struct sk_buff *skb);

    int         (*handler)(struct sk_buff *skb);

​

    /* This returns an error if we weren't able to handle the error. */

    int         (*err_handler)(struct sk_buff *skb, u32 info);

​

    unsigned int        no_policy:1,

                netns_ok:1,

                /* does the protocol do more stringent

                 * icmp tag validation than simple

                 * socket lookup?

                 */

                icmp_strict_tag_validation:1;

};

​

#if IS_ENABLED(CONFIG_IPV6)

struct inet6_protocol {

    void    (*early_demux)(struct sk_buff *skb);

    void    (*early_demux_handler)(struct sk_buff *skb);

    int (*handler)(struct sk_buff *skb);

​