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C++ program to set network settings for IPv6 Network in Linux Devices

mahmoud2506
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2022-05-05
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C++ program to set network settings for IPv6 Network in Linux Devices

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mahmoud2506
2022-05-05
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Consider the program:

#include <iostream>
using namespace std;

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>

//function to set IPv6 and Gateway
void setIPv6(char * ip,unsigned int prefix,char * gateway)
{
	char cmd[128]={0};
	char nwkInf[5]="eth0";
	
	sprintf(cmd,"ip addr flush dev %s",nwkInf);
	system(cmd); 
	
	memset(cmd,0x00,128);
	sprintf(cmd,"ip link set %s down",nwkInf);
	system(cmd); 
	
	memset(cmd,0x00,128);
	sprintf(cmd,"/sbin/ip -6 addr add %s/%d dev %s",ip,prefix,nwkInf);
	system(cmd); 

	memset(cmd,0x00,128);
	sprintf(cmd,"/sbin/route -A inet6 add default gw %s",gateway);
	system(cmd); 

	memset(cmd,0x00,128);
	sprintf(cmd,"ip link set %s up",nwkInf);
	system(cmd); 	
}

//main program
int main()
{
	//passing IPv6,prefix and Gateway
	setIPv6("fd18:6dc5:3dbc:ce24::5",64,"fd18:6dc5:3dbc:ce24::1");

	return 0;
}

Here, "fd18:6dc5:3dbc:ce24::5" is IP Address, 64 is prefix value and "fd18:6dc5:3dbc:ce24::1" Gateway.

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