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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/**
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* Thanks https://github.com/NICMx/Jool/blob/5f60dcda5944b01cc43c3be342aad26af8161bcb/include/nat64/mod/common/nf_wrapper.h for mapped kernel versions
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*/
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#ifndef _JOOL_MOD_NF_WRAPPER_H
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#define _JOOL_MOD_NF_WRAPPER_H
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/**
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* @file
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* The kernel API is far from static. In particular, the Netfilter packet entry
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* function keeps changing. nf_hook.c, the file where we declare our packet
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* entry function, has been quite difficult to read for a while now. It's pretty
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* amusing, because we don't even use any of the noisy arguments.
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*
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* This file declares a usable function header that abstracts away all those
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* useless arguments.
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*/
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#include <linux/version.h>
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/* If this is a Red Hat-based kernel (Red Hat, CentOS, Fedora, etc)... */
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#ifdef RHEL_RELEASE_CODE
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#if RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7, 2)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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const struct nf_hook_ops *ops, \
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struct sk_buff *skb, \
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const struct net_device *in, \
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const struct net_device *out, \
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const struct nf_hook_state *state) \
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#elif RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7, 0)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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const struct nf_hook_ops *ops, \
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struct sk_buff *skb, \
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const struct net_device *in, \
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const struct net_device *out, \
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int (*okfn)(struct sk_buff *))
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#else
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/*
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* Sorry, I don't have headers for RHEL 6 and below because I'm in a bit of a
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* deadline right now.
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* If this is causing you trouble, find `nf_hookfn` in your kernel headers
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* (typically in include/linux/netfilter.h) and add your version of the
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* NF_CALLBACK macro here.
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* Also, kernel headers per version can be found here: http://vault.centos.org/
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*/
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#error "Sorry; this version of RHEL is not supported because it's kind of old."
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#endif /* RHEL_RELEASE_CODE >= x */
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/* If this NOT a RedHat-based kernel (Ubuntu, Debian, SuSE, etc)... */
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#else
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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void *priv, \
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struct sk_buff *skb, \
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const struct nf_hook_state *state)
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#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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const struct nf_hook_ops *ops, \
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struct sk_buff *skb, \
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const struct nf_hook_state *state)
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#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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const struct nf_hook_ops *ops, \
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struct sk_buff *skb, \
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const struct net_device *in, \
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const struct net_device *out, \
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int (*okfn)(struct sk_buff *))
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#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
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#define NF_CALLBACK(name, skb) unsigned int name( \
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unsigned int hooknum, \
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struct sk_buff *skb, \
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const struct net_device *in, \
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const struct net_device *out, \
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int (*okfn)(struct sk_buff *))
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#else
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#error "Linux < 3.0 isn't supported at all."
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#endif /* LINUX_VERSION_CODE > n */
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#endif /* RHEL or not RHEL */
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#endif /* _JOOL_MOD_NF_WRAPPER_H */
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