Prerequisites:
Given a string str, the task is to extract all the IP addresses from the given string. Let us see how to extract IP addresses from a file.
Input:
str=”The IPV4 address of Port A is: 257.120.223.13. And the IPV6 address is:fffe:3465:efab:23fe:2235:6565:aaab:0001″
Output:
257.120.223.13
fffe:3465:efab:23fe:2235:6565:aaab:0001
Create a regex pattern to validate the number as written below:
- Regex_IPV4 = “(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])“
- Regex_IPV6=”((([0-9a-fA-F]){1,4})\\:){7}([0-9a-fA-F]){1,4}”
Follow the below steps to implement the idea:
- Create a regex expression to extract all the IP Addresses from the string.
- Use Pattern class to compile the regex formed.
- Use the matcher function to find.
Below is the implementation of the above approach:
C++
// C++ Program to Extract IP// From given string#include <bits/stdc++.h>using namespace std;int main(){ // String to observe string subject = "The IPV4 address of Port A is :257.120.223.13 . " "And the IPV6 address " "is:fffe:3465:efab:23fe:2235:6565:aaab:0001"; // Regex for IPV4 regex pattern( "(\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})"); cout << "Available IP Addresses in the Given String Are:" << endl; // Iterating over string to extract all // IPV4 patterns for (regex_iterator<string::iterator> it( subject.begin(), subject.end(), pattern); it != regex_iterator<string::iterator>(); ++it) { cout << it->str() << endl; } // Regex for IPV6 regex pattern1( "((([0-9a-fA-F]){1,4})\\:){7}([0-9a-fA-F]){1,4}"); // Iterating over string to extract all // IPV6 patterns for (regex_iterator<string::iterator> it( subject.begin(), subject.end(), pattern1); it != regex_iterator<string::iterator>(); ++it) { cout << it->str() << endl; } return 0;} |
Java
// Java Program to Extract IP// From given stringimport java.io.*;import java.util.regex.Matcher;import java.util.regex.Pattern;public class GFG { // Driver Code public static void main(String[] args) { // String containing in it String str = " The IPV4 address of Port A is :257.120.223.13 . And the IPV6 address is:fffe:3465:efab:23fe:2235:6565:aaab:0001"; System.out.println( "Available IP Addresses in the Given String Are:"); extractIP_Addresses(str); } // Function to extract IP Address // from a given string static void extractIP_Addresses(String str) { // You can Add n number of Email // formats in the below given // String Array. String strPattern[] = { "(\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})", "((([0-9a-fA-F]){1,4})\\:){7}([0-9a-fA-F]){1,4}" }; // Extracting all Patterns from the string for (int i = 0; i < strPattern.length; i++) { Pattern pattern = Pattern.compile(strPattern[i]); Matcher matcher = pattern.matcher(str); while (matcher.find()) { System.out.println(matcher.group()); } } }} |
Python3
import re# String to observesubject = ("The IPV4 address of Port A is :257.120.223.13 . " "And the IPV6 address " "is:fffe:3465:efab:23fe:2235:6565:aaab:0001")# Regex for IPV4pattern_ipv4 = r'\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b'print("Available IP Addresses in the Given String Are:")# Find all IPV4 patternsipv4_addresses = re.findall(pattern_ipv4, subject)for address in ipv4_addresses: print(address)# Regex for IPV6pattern_ipv6 = r'\b(?:[A-Fa-f0-9]{1,4}:){7}[A-Fa-f0-9]{1,4}\b'# Find all IPV6 patternsipv6_addresses = re.findall(pattern_ipv6, subject)for address in ipv6_addresses: print(address) |
C#
using System;using System.Text.RegularExpressions;namespace GFG{ class Program { static void Main(string[] args) { // String containing IP addresses string str = " The IPV4 address of Port A is :257.120.223.13 . And the IPV6 address is:fffe:3465:efab:23fe:2235:6565:aaab:0001"; Console.WriteLine("Available IP Addresses in the Given String Are:"); ExtractIPAddresses(str); } static void ExtractIPAddresses(string str) { // Patterns for IPV4 and IPV6 addresses string[] strPattern = { @"(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})", @"(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})\:(([0-9a-fA-F]){1,4})" }; // Extracting all patterns from the string for (int i = 0; i < strPattern.Length; i++) { Regex pattern = new Regex(strPattern[i]); MatchCollection matches = pattern.Matches(str); foreach (Match match in matches) { Console.WriteLine(match.Value); } } } }} |
Javascript
// String to observeconst subject = "The IPV4 address of Port A is :257.120.223.13 . And the IPV6 address is:fffe:3465:efab:23fe:2235:6565:aaab:0001";// Regex for IPV4const pattern = /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/g;console.log("Available IP Addresses in the Given String Are:");// Iterating over string to extract all IPV4 patternslet match;while ((match = pattern.exec(subject)) !== null) { console.log(match[0]);}// Regex for IPV6const pattern1 = /((([0-9a-fA-F]){1,4})\:){7}([0-9a-fA-F]){1,4}/g;// Iterating over string to extract all IPV6 patternswhile ((match = pattern1.exec(subject)) !== null) { console.log(match[0]);} |
Output
Available IP Addresses in the Given String Are: 257.120.223.13 fffe:3465:efab:23fe:2235:6565:aaab:0001
Time Complexity: O(n)
Space Complexity: O(1)
