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Make hello-packet works in kernel version >= 4.13 #4

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Make hello-packet works in kernel version >= 4.13 #4

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10 changes: 10 additions & 0 deletions hello-packet.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
#include <linux/init.h> // included for __init and __exit macros
#include <linux/netfilter.h>
#include <linux/vmalloc.h>
#include <linux/version.h>

//#undef __KERNEL__
#include <linux/netfilter_ipv4.h>
Expand Down Expand Up @@ -31,7 +32,11 @@ static int init_filter_if(void)
nfho.pf = PF_INET;
nfho.priority = NF_IP_PRI_FIRST;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,13,0)
nf_register_net_hook(&init_net, &nfho);
#else
nf_register_hook(&nfho);
#endif

return 0;
}
Expand All @@ -45,7 +50,12 @@ static int __init hello_init(void)

static void __exit hello_cleanup(void)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,13,0)
nf_unregister_net_hook(&init_net, &nfho);
#else
nf_unregister_hook(&nfho);
#endif

printk(KERN_INFO "Cleaning up module.\n");
}

Expand Down