virtual_net.h

См. документацию.

#pragma once
 
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/inet.h>
#include <linux/sysctl.h>
#include <linux/rtnetlink.h>
#include <linux/types.h>
#include <net/ip.h>
 
#define VNET_IFNAME "vnet0"
 
#define VNET_DEFAULT_IP "10.0.0.1"
 
static char vnet_ip_str[16] = VNET_DEFAULT_IP; 
static DEFINE_SPINLOCK(vnet_ip_lock); 
static struct ctl_table_header *vnet_sysctl_header; 
static struct net_device *vnet_dev; 
static int __init virtual_net_init(void);
 
static void __exit virtual_net_exit(void);
 
static netdev_tx_t vnet_xmit(struct sk_buff *skb, struct net_device *dev);
 
static void vnet_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
 
static void vnet_arp_reply(struct sk_buff const *skb, struct net_device *dev, __u32 target_ip);
 
static int vnet_sysctl_handler(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos);
 
static bool str_to_ip(__u32 *ip_out, const char *ip_str, spinlock_t *lock);
 
static int modify_vif_ip_userspace(const char *name, const char *ip_str, bool is_add);
 
struct vnet_priv {
    struct rtnl_link_stats64 stats; 
};
 
static const struct net_device_ops vnet_ops = {
    .ndo_start_xmit = vnet_xmit,      
    .ndo_get_stats64 = vnet_get_stats64, 
};
 
static struct ctl_table vnet_table[] = {
    {
        .procname = "ip_addr",             
        .data = vnet_ip_str,               
        .maxlen = sizeof(vnet_ip_str),     
        .mode = 0644,                      
        .proc_handler = vnet_sysctl_handler, 
    },
};