Parse an IP Address
You are encouraged to solve this task according to the task description, using any language you may know.
The purpose of this task is to demonstrate parsing of text-format IP addresses, using IPv4 and IPv6.
Taking the following as inputs:
127.0.0.1 The "localhost" IPv4 address 127.0.0.1:80 The "localhost" IPv4 address, with a specified port (80) ::1 The "localhost" IPv6 address [::1]:80 The "localhost" IPv6 address, with a specified port (80) 2605:2700:0:3::4713:93e3 Rosetta Code's primary server's public IPv6 address [2605:2700:0:3::4713:93e3]:80 Rosetta Code's primary server's public IPv6 address, with a specified port (80)
- Task
Emit each described IP address as a hexadecimal integer representing the address, the address space, and the port number specified, if any.
In languages where variant result types are clumsy, the result should be ipv4 or ipv6 address number, something which says which address space was represented, port number and something that says if the port was specified.
- Example
127.0.0.1 has the address number 7F000001 (2130706433 decimal) in the ipv4 address space.
::ffff:127.0.0.1 represents the same address in the ipv6 address space where it has the address number FFFF7F000001 (281472812449793 decimal).
::1 has address number 1 and serves the same purpose in the ipv6 address
space that 127.0.0.1 serves in the ipv4 address space.
AutoHotkey
ParseIP(Address){
return InStr(A_LoopField, ".") ? IPv4(Address) : IPv6(Address)
}
IPv4(Address){
for i, v in StrSplit(Address, "."){
x := StrSplit(v, ":")
num .= SubStr("00" . Format("{:X}", x.1), -1)
port := x.2 ? x.2 : ""
}
return [num, port]
}
IPv6(Address){
for i, v in StrSplit(Address, "]")
if i = 1
for j, x in StrSplit(LTrim(v, "[:"), ":")
num .= x = "" ? "00000000" : SubStr("0000" x, -3)
else
port := LTrim(v, ":")
return [SubStr("00000000000000000000000000000000" num, -31), port]
}
Examples:
data =
(
127.0.0.1
127.0.0.1:80
::1
[::1]:80
2605:2700:0:3::4713:93e3
[2605:2700:0:3::4713:93e3]:80
)
output := ""
loop, parse, data, `n, `r
{
x := ParseIP(A_LoopField)
output .= "input = " A_LoopField "`t>`t" x.1 . (x.2 ? " port : " x.2 : "") "`n"
}
MsgBox % output
return
- Output:
input = 127.0.0.1 > 7F000001 input = 127.0.0.1:80 > 7F000001 port : 80 input = ::1 > 00000000000000000000000000000001 input = [::1]:80 > 00000000000000000000000000000001 port : 80 input = 2605:2700:0:3::4713:93e3 > 260527000000000300000000471393e3 input = [2605:2700:0:3::4713:93e3]:80 > 260527000000000300000000471393e3 port : 80
C
#include <string.h>
#include <memory.h>
static unsigned int _parseDecimal ( const char** pchCursor )
{
unsigned int nVal = 0;
char chNow;
while ( chNow = **pchCursor, chNow >= '0' && chNow <= '9' )
{
//shift digit in
nVal *= 10;
nVal += chNow - '0';
++*pchCursor;
}
return nVal;
}
static unsigned int _parseHex ( const char** pchCursor )
{
unsigned int nVal = 0;
char chNow;
while ( chNow = **pchCursor & 0x5f, //(collapses case, but mutilates digits)
(chNow >= ('0'&0x5f) && chNow <= ('9'&0x5f)) ||
(chNow >= 'A' && chNow <= 'F')
)
{
unsigned char nybbleValue;
chNow -= 0x10; //scootch digital values down; hex now offset by x31
nybbleValue = ( chNow > 9 ? chNow - (0x31-0x0a) : chNow );
//shift nybble in
nVal <<= 4;
nVal += nybbleValue;
++*pchCursor;
}
return nVal;
}
//Parse a textual IPv4 or IPv6 address, optionally with port, into a binary
//array (for the address, in network order), and an optionally provided port.
//Also, indicate which of those forms (4 or 6) was parsed. Return true on
//success. ppszText must be a nul-terminated ASCII string. It will be
//updated to point to the character which terminated parsing (so you can carry
//on with other things. abyAddr must be 16 bytes. You can provide NULL for
//abyAddr, nPort, bIsIPv6, if you are not interested in any of those
//informations. If we request port, but there is no port part, then nPort will
//be set to 0. There may be no whitespace leading or internal (though this may
//be used to terminate a successful parse.
//Note: the binary address and integer port are in network order.
int ParseIPv4OrIPv6 ( const char** ppszText,
unsigned char* abyAddr, int* pnPort, int* pbIsIPv6 )
{
unsigned char* abyAddrLocal;
unsigned char abyDummyAddr[16];
//find first colon, dot, and open bracket
const char* pchColon = strchr ( *ppszText, ':' );
const char* pchDot = strchr ( *ppszText, '.' );
const char* pchOpenBracket = strchr ( *ppszText, '[' );
const char* pchCloseBracket = NULL;
//we'll consider this to (probably) be IPv6 if we find an open
//bracket, or an absence of dots, or if there is a colon, and it
//precedes any dots that may or may not be there
int bIsIPv6local = NULL != pchOpenBracket || NULL == pchDot ||
( NULL != pchColon && ( NULL == pchDot || pchColon < pchDot ) );
//OK, now do a little further sanity check our initial guess...
if ( bIsIPv6local )
{
//if open bracket, then must have close bracket that follows somewhere
pchCloseBracket = strchr ( *ppszText, ']' );
if ( NULL != pchOpenBracket && ( NULL == pchCloseBracket ||
pchCloseBracket < pchOpenBracket ) )
return 0;
}
else //probably ipv4
{
//dots must exist, and precede any colons
if ( NULL == pchDot || ( NULL != pchColon && pchColon < pchDot ) )
return 0;
}
//we figured out this much so far....
if ( NULL != pbIsIPv6 )
*pbIsIPv6 = bIsIPv6local;
//especially for IPv6 (where we will be decompressing and validating)
//we really need to have a working buffer even if the caller didn't
//care about the results.
abyAddrLocal = abyAddr; //prefer to use the caller's
if ( NULL == abyAddrLocal ) //but use a dummy if we must
abyAddrLocal = abyDummyAddr;
//OK, there should be no correctly formed strings which are miscategorized,
//and now any format errors will be found out as we continue parsing
//according to plan.
if ( ! bIsIPv6local ) //try to parse as IPv4
{
//4 dotted quad decimal; optional port if there is a colon
//since there are just 4, and because the last one can be terminated
//differently, I'm just going to unroll any potential loop.
unsigned char* pbyAddrCursor = abyAddrLocal;
unsigned int nVal;
const char* pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText ); //get first val
if ( '.' != **ppszText || nVal > 255 || pszTextBefore == *ppszText ) //must be in range and followed by dot and nonempty
return 0;
*(pbyAddrCursor++) = (unsigned char) nVal; //stick it in addr
++(*ppszText); //past the dot
pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText ); //get second val
if ( '.' != **ppszText || nVal > 255 || pszTextBefore == *ppszText )
return 0;
*(pbyAddrCursor++) = (unsigned char) nVal;
++(*ppszText); //past the dot
pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText ); //get third val
if ( '.' != **ppszText || nVal > 255 || pszTextBefore == *ppszText )
return 0;
*(pbyAddrCursor++) = (unsigned char) nVal;
++(*ppszText); //past the dot
pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText ); //get fourth val
if ( nVal > 255 || pszTextBefore == *ppszText ) //(we can terminate this one in several ways)
return 0;
*(pbyAddrCursor++) = (unsigned char) nVal;
if ( ':' == **ppszText && NULL != pnPort ) //have port part, and we want it
{
unsigned short usPortNetwork; //save value in network order
++(*ppszText); //past the colon
pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText );
if ( nVal > 65535 || pszTextBefore == *ppszText )
return 0;
((unsigned char*)&usPortNetwork)[0] = ( nVal & 0xff00 ) >> 8;
((unsigned char*)&usPortNetwork)[1] = ( nVal & 0xff );
*pnPort = usPortNetwork;
return 1;
}
else //finished just with ip address
{
if ( NULL != pnPort )
*pnPort = 0; //indicate we have no port part
return 1;
}
}
else //try to parse as IPv6
{
unsigned char* pbyAddrCursor;
unsigned char* pbyZerosLoc;
int bIPv4Detected;
int nIdx;
//up to 8 16-bit hex quantities, separated by colons, with at most one
//empty quantity, acting as a stretchy run of zeroes. optional port
//if there are brackets followed by colon and decimal port number.
//A further form allows an ipv4 dotted quad instead of the last two
//16-bit quantities, but only if in the ipv4 space ::ffff:x:x .
if ( NULL != pchOpenBracket ) //start past the open bracket, if it exists
*ppszText = pchOpenBracket + 1;
pbyAddrCursor = abyAddrLocal;
pbyZerosLoc = NULL; //if we find a 'zero compression' location
bIPv4Detected = 0;
for ( nIdx = 0; nIdx < 8; ++nIdx ) //we've got up to 8 of these, so we will use a loop
{
const char* pszTextBefore = *ppszText;
unsigned nVal =_parseHex ( ppszText ); //get value; these are hex
if ( pszTextBefore == *ppszText ) //if empty, we are zero compressing; note the loc
{
if ( NULL != pbyZerosLoc ) //there can be only one!
{
//unless it's a terminal empty field, then this is OK, it just means we're done with the host part
if ( pbyZerosLoc == pbyAddrCursor )
{
--nIdx;
break;
}
return 0; //otherwise, it's a format error
}
if ( ':' != **ppszText ) //empty field can only be via :
return 0;
if ( 0 == nIdx ) //leading zero compression requires an extra peek, and adjustment
{
++(*ppszText);
if ( ':' != **ppszText )
return 0;
}
pbyZerosLoc = pbyAddrCursor;
++(*ppszText);
}
else
{
if ( '.' == **ppszText ) //special case of ipv4 convenience notation
{
//who knows how to parse ipv4? we do!
const char* pszTextlocal = pszTextBefore; //back it up
unsigned char abyAddrlocal[16];
int bIsIPv6local;
int bParseResultlocal = ParseIPv4OrIPv6 ( &pszTextlocal, abyAddrlocal, NULL, &bIsIPv6local );
*ppszText = pszTextlocal; //success or fail, remember the terminating char
if ( ! bParseResultlocal || bIsIPv6local ) //must parse and must be ipv4
return 0;
//transfer addrlocal into the present location
*(pbyAddrCursor++) = abyAddrlocal[0];
*(pbyAddrCursor++) = abyAddrlocal[1];
*(pbyAddrCursor++) = abyAddrlocal[2];
*(pbyAddrCursor++) = abyAddrlocal[3];
++nIdx; //pretend like we took another short, since the ipv4 effectively is two shorts
bIPv4Detected = 1; //remember how we got here for further validation later
break; //totally done with address
}
if ( nVal > 65535 ) //must be 16 bit quantity
return 0;
*(pbyAddrCursor++) = nVal >> 8; //transfer in network order
*(pbyAddrCursor++) = nVal & 0xff;
if ( ':' == **ppszText ) //typical case inside; carry on
{
++(*ppszText);
}
else //some other terminating character; done with this parsing parts
{
break;
}
}
}
//handle any zero compression we found
if ( NULL != pbyZerosLoc )
{
int nHead = (int)( pbyZerosLoc - abyAddrLocal ); //how much before zero compression
int nTail = nIdx * 2 - (int)( pbyZerosLoc - abyAddrLocal ); //how much after zero compression
int nZeros = 16 - nTail - nHead; //how much zeros
memmove ( &abyAddrLocal[16-nTail], pbyZerosLoc, nTail ); //scootch stuff down
memset ( pbyZerosLoc, 0, nZeros ); //clear the compressed zeros
}
//validation of ipv4 subspace ::ffff:x.x
if ( bIPv4Detected )
{
static const unsigned char abyPfx[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
if ( 0 != memcmp ( abyAddrLocal, abyPfx, sizeof(abyPfx) ) )
return 0;
}
//close bracket
if ( NULL != pchOpenBracket )
{
if ( ']' != **ppszText )
return 0;
++(*ppszText);
}
if ( ':' == **ppszText && NULL != pnPort ) //have port part, and we want it
{
const char* pszTextBefore;
unsigned int nVal;
unsigned short usPortNetwork; //save value in network order
++(*ppszText); //past the colon
pszTextBefore = *ppszText;
pszTextBefore = *ppszText;
nVal =_parseDecimal ( ppszText );
if ( nVal > 65535 || pszTextBefore == *ppszText )
return 0;
((unsigned char*)&usPortNetwork)[0] = ( nVal & 0xff00 ) >> 8;
((unsigned char*)&usPortNetwork)[1] = ( nVal & 0xff );
*pnPort = usPortNetwork;
return 1;
}
else //finished just with ip address
{
if ( NULL != pnPort )
*pnPort = 0; //indicate we have no port part
return 1;
}
}
}
//simple version if we want don't care about knowing how much we ate
int ParseIPv4OrIPv6_2 ( const char* pszText,
unsigned char* abyAddr, int* pnPort, int* pbIsIPv6 )
{
const char* pszTextLocal = pszText;
return ParseIPv4OrIPv6 ( &pszTextLocal, abyAddr, pnPort, pbIsIPv6);
}
Test:
#include <stdio.h>
... (above code for ParseIPv4OrIPv6 goes here) ...
unsigned short htons ( unsigned short us )
{
return ( ((unsigned char*)&us)[0] << 8 ) + ((unsigned char*)&us)[1];
}
void dumpbin ( unsigned char* pbyBin, int nLen )
{
int i;
for ( i = 0; i < nLen; ++i )
{
printf ( "%02x", pbyBin[i] );
}
}
void testcase ( const char* pszTest )
{
unsigned char abyAddr[16];
int bIsIPv6;
int nPort;
int bSuccess;
printf ( "Test case '%s'\n", pszTest );
const char* pszTextCursor = pszTest;
bSuccess = ParseIPv4OrIPv6 ( &pszTextCursor, abyAddr, &nPort, &bIsIPv6 );
if ( ! bSuccess )
{
printf ( "parse failed, at about index %d; rest: '%s'\n", pszTextCursor - pszTest, pszTextCursor );
return;
}
printf ( "addr: " );
dumpbin ( abyAddr, bIsIPv6 ? 16 : 4 );
printf ( "\n" );
if ( 0 == nPort )
printf ( "port absent" );
else
printf ( "port: %d", htons ( nPort ) );
printf ( "\n\n" );
}
int main ( int argc, char* argv[] )
{
//The "localhost" IPv4 address
testcase ( "127.0.0.1" );
//The "localhost" IPv4 address, with a specified port (80)
testcase ( "127.0.0.1:80" );
//The "localhost" IPv6 address
testcase ( "::1" );
//The "localhost" IPv6 address, with a specified port (80)
testcase ( "[::1]:80" );
//Rosetta Code's primary server's public IPv6 address
testcase ( "2605:2700:0:3::4713:93e3" );
//Rosetta Code's primary server's public IPv6 address, with a specified port (80)
testcase ( "[2605:2700:0:3::4713:93e3]:80" );
//ipv4 space
testcase ( "::ffff:192.168.173.22" );
//ipv4 space with port
testcase ( "[::ffff:192.168.173.22]:80" );
//trailing compression
testcase ( "1::" );
//trailing compression with port
testcase ( "[1::]:80" );
//'any' address compression
testcase ( "::" );
//'any' address compression with port
testcase ( "[::]:80" );
return 0;
}
Output:
Test case '127.0.0.1' addr: 7f000001 port absent Test case '127.0.0.1:80' addr: 7f000001 port: 80 Test case '::1' addr: 00000000000000000000000000000001 port absent Test case '[::1]:80' addr: 00000000000000000000000000000001 port: 80 Test case '2605:2700:0:3::4713:93e3' addr: 260527000000000300000000471393e3 port absent Test case '[2605:2700:0:3::4713:93e3]:80' addr: 260527000000000300000000471393e3 port: 80 Test case '::ffff:192.168.173.22' addr: 00000000000000000000ffffc0a8ad16 port absent Test case '[::ffff:192.168.173.22]:80' addr: 00000000000000000000ffffc0a8ad16 port: 80 Test case '1::' addr: 00010000000000000000000000000000 port absent Test case '[1::]:80' addr: 00010000000000000000000000000000 port: 80 Test case '::' addr: 00000000000000000000000000000000 port absent Test case '[::]:80' addr: 00000000000000000000000000000000 port: 80
POSIX
The task is a bit easier on POSIX platforms where we can use the function inet_pton to parse IP addresses. This approach will also work on Microsoft Windows with some minor changes.
#include <arpa/inet.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
typedef struct ip_address_tag {
union {
uint8_t address_v6[16];
uint32_t address_v4;
} address;
uint16_t family;
uint16_t port;
} ip_address_t;
bool parse_ipv4_address(const char* input, ip_address_t* result) {
struct in_addr addr;
if (inet_pton(AF_INET, input, &addr) == 1) {
result->family = AF_INET;
result->address.address_v4 = ntohl(addr.s_addr);
result->port = 0;
return true;
}
return false;
}
bool parse_ipv6_address(const char* input, ip_address_t* result) {
struct in6_addr addr;
if (inet_pton(AF_INET6, input, &addr) == 1) {
result->family = AF_INET6;
memcpy(result->address.address_v6, addr.s6_addr, 16);
result->port = 0;
return true;
}
return false;
}
uint16_t parse_port_number(const char* str) {
char* eptr;
unsigned long port = strtoul(str, &eptr, 10);
if (port > 0 && *eptr == '\0' && port <= UINT16_MAX)
return (uint16_t)port;
return 0;
}
//
// Parse an IP address and port from the given input string.
// Returns false if the input is not valid.
//
// Valid formats are:
// [ipv6_address]:port
// ipv4_address:port
// ipv4_address
// ipv6_address
//
bool parse_address(const char* input, ip_address_t* result) {
char* ptr = strrchr(input, ':');
if (ptr != NULL && ptr > input) {
uint16_t port = parse_port_number(ptr + 1);
if (port > 0) {
bool success = false;
char* copy = strdup(input);
if (copy == NULL)
return false;
int index = ptr - input;
copy[index] = '\0';
if (copy[index - 1] == ']' && copy[0] == '[') {
copy[index - 1] = '\0';
if (parse_ipv6_address(copy + 1, result))
success = true;
} else if (parse_ipv4_address(copy, result)) {
success = true;
}
free(copy);
if (success) {
result->port = port;
return true;
}
}
}
return parse_ipv6_address(input, result)
|| parse_ipv4_address(input, result);
}
void test_parse_address(const char* input) {
printf("input: %s\n", input);
ip_address_t result;
if (parse_address(input, &result)) {
printf("address family: %s\n",
result.family == AF_INET ? "IPv4" : "IPv6");
if (result.family == AF_INET)
printf("address: %X", result.address.address_v4);
else if (result.family == AF_INET6) {
printf("address: ");
for (int i = 0; i < 16; ++i)
printf("%02X", (unsigned int)result.address.address_v6[i]);
}
printf("\n");
if (result.port > 0)
printf("port: %hu\n", result.port);
else
printf("port not specified\n");
} else {
printf("Parsing failed.\n");
}
printf("\n");
}
int main() {
test_parse_address("127.0.0.1");
test_parse_address("127.0.0.1:80");
test_parse_address("::ffff:127.0.0.1");
test_parse_address("::1");
test_parse_address("[::1]:80");
test_parse_address("1::80");
test_parse_address("2605:2700:0:3::4713:93e3");
test_parse_address("[2605:2700:0:3::4713:93e3]:80");
return 0;
}
- Output:
input: 127.0.0.1 address family: IPv4 address: 7F000001 port not specified input: 127.0.0.1:80 address family: IPv4 address: 7F000001 port: 80 input: ::ffff:127.0.0.1 address family: IPv6 address: 00000000000000000000FFFF7F000001 port not specified input: ::1 address family: IPv6 address: 00000000000000000000000000000001 port not specified input: [::1]:80 address family: IPv6 address: 00000000000000000000000000000001 port: 80 input: 1::80 address family: IPv6 address: 00010000000000000000000000000080 port not specified input: 2605:2700:0:3::4713:93e3 address family: IPv6 address: 260527000000000300000000471393E3 port not specified input: [2605:2700:0:3::4713:93e3]:80 address family: IPv6 address: 260527000000000300000000471393E3 port: 80
C#
using System;
using System.Text.RegularExpressions;
using System.Text;
class ParseIPAddress
{
private static readonly Regex IPV4_PAT = new Regex(@"^(\d+)\.(\d+)\.(\d+)\.(\d+)(?::(\d+)){0,1}$");
private static readonly Regex IPV6_DOUBL_COL_PAT = new Regex(@"^\[{0,1}([0-9a-f:]*)::([0-9a-f:]*)(?:\]:(\d+)){0,1}$");
private static readonly Regex IPV6_PAT;
static ParseIPAddress()
{
string ipv6Pattern = @"^\[{0,1}";
for (int i = 1; i <= 7; i++)
{
ipv6Pattern += @"([0-9a-f]+):";
}
ipv6Pattern += @"([0-9a-f]+)(?:\]:(\d+)){0,1}$";
IPV6_PAT = new Regex(ipv6Pattern);
}
static void Main(string[] args)
{
string[] tests = new string[] { "192.168.0.1", "127.0.0.1", "256.0.0.1", "127.0.0.1:80", "::1", "[::1]:80", "[32e::12f]:80", "2605:2700:0:3::4713:93e3", "[2605:2700:0:3::4713:93e3]:80", "2001:db8:85a3:0:0:8a2e:370:7334" };
Console.WriteLine(String.Format("{0,-40} {1,-32} {2}", "Test Case", "Hex Address", "Port"));
foreach (var ip in tests)
{
try
{
string[] parsed = ParseIP(ip);
Console.WriteLine(String.Format("{0,-40} {1,-32} {2}", ip, parsed[0], parsed[1]));
}
catch (ArgumentException e)
{
Console.WriteLine(String.Format("{0,-40} Invalid address: {1}", ip, e.Message));
}
}
}
private static string[] ParseIP(string ip)
{
string hex = "";
string port = "";
// IPV4
Match ipv4Matcher = IPV4_PAT.Match(ip);
if (ipv4Matcher.Success)
{
for (int i = 1; i <= 4; i++)
{
hex += ToHex4(ipv4Matcher.Groups[i].Value);
}
if (ipv4Matcher.Groups[5].Success)
{
port = ipv4Matcher.Groups[5].Value;
}
return new string[] { hex, port };
}
// IPV6, double colon
Match ipv6DoubleColonMatcher = IPV6_DOUBL_COL_PAT.Match(ip);
if (ipv6DoubleColonMatcher.Success)
{
string p1 = ipv6DoubleColonMatcher.Groups[1].Value;
if (p1 == "")
{
p1 = "0";
}
string p2 = ipv6DoubleColonMatcher.Groups[2].Value;
if (p2 == "")
{
p2 = "0";
}
ip = p1 + GetZero(8 - NumCount(p1) - NumCount(p2)) + p2;
if (ipv6DoubleColonMatcher.Groups[3].Success)
{
ip = "[" + ip + "]:" + ipv6DoubleColonMatcher.Groups[3].Value;
}
}
// IPV6
Match ipv6Matcher = IPV6_PAT.Match(ip);
if (ipv6Matcher.Success)
{
for (int i = 1; i <= 8; i++)
{
hex += String.Format("{0,4}", ToHex6(ipv6Matcher.Groups[i].Value)).Replace(" ", "0");
}
if (ipv6Matcher.Groups[9].Success)
{
port = ipv6Matcher.Groups[9].Value;
}
return new string[] { hex, port };
}
throw new ArgumentException("ERROR 103: Unknown address: " + ip);
}
private static int NumCount(string s)
{
return s.Split(':').Length;
}
private static string GetZero(int count)
{
StringBuilder sb = new StringBuilder();
sb.Append(":");
while (count > 0)
{
sb.Append("0:");
count--;
}
return sb.ToString();
}
private static string ToHex4(string s)
{
int val = int.Parse(s);
if (val < 0 || val > 255)
{
throw new ArgumentException("ERROR 101: Invalid value : " + s);
}
return val.ToString("X2");
}
private static string ToHex6(string s)
{
int val = int.Parse(s, System.Globalization.NumberStyles.HexNumber);
if (val < 0 || val > 65536)
{
throw new ArgumentException("ERROR 102: Invalid hex value : " + s);
}
return s;
}
}
- Output:
Test Case Hex Address Port 192.168.0.1 C0A80001 127.0.0.1 7F000001 256.0.0.1 Invalid address: ERROR 101: Invalid value : 256 127.0.0.1:80 7F000001 80 ::1 00000000000000000000000000000001 [::1]:80 00000000000000000000000000000001 80 [32e::12f]:80 032e000000000000000000000000012f 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 80 2001:db8:85a3:0:0:8a2e:370:7334 20010db885a3000000008a2e03707334
C++
#include <boost/asio/ip/address.hpp>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <limits>
#include <string>
using boost::asio::ip::address;
using boost::asio::ip::address_v4;
using boost::asio::ip::address_v6;
using boost::asio::ip::make_address;
using boost::asio::ip::make_address_v4;
using boost::asio::ip::make_address_v6;
template<typename uint>
bool parse_int(const std::string& str, int base, uint& n) {
try {
size_t pos = 0;
unsigned long u = stoul(str, &pos, base);
if (pos != str.length() || u > std::numeric_limits<uint>::max())
return false;
n = static_cast<uint>(u);
return true;
} catch (const std::exception& ex) {
return false;
}
}
//
// Parse an IP address and port from the given input string.
//
// Throws an exception if the input is not valid.
//
// Valid formats are:
// [ipv6_address]:port
// ipv4_address:port
// ipv4_address
// ipv6_address
//
void parse_ip_address_and_port(const std::string& input, address& addr, uint16_t& port) {
size_t pos = input.rfind(':');
if (pos != std::string::npos && pos > 1 && pos + 1 < input.length()
&& parse_int(input.substr(pos + 1), 10, port) && port > 0) {
if (input[0] == '[' && input[pos - 1] == ']') {
// square brackets so can only be an IPv6 address
addr = make_address_v6(input.substr(1, pos - 2));
return;
} else {
try {
// IPv4 address + port?
addr = make_address_v4(input.substr(0, pos));
return;
} catch (const std::exception& ex) {
// nope, might be an IPv6 address
}
}
}
port = 0;
addr = make_address(input);
}
void print_address_and_port(const address& addr, uint16_t port) {
std::cout << std::hex << std::uppercase << std::setfill('0');
if (addr.is_v4()) {
address_v4 addr4 = addr.to_v4();
std::cout << "address family: IPv4\n";
std::cout << "address number: " << std::setw(8) << addr4.to_uint() << '\n';
} else if (addr.is_v6()) {
address_v6 addr6 = addr.to_v6();
address_v6::bytes_type bytes(addr6.to_bytes());
std::cout << "address family: IPv6\n";
std::cout << "address number: ";
for (unsigned char byte : bytes)
std::cout << std::setw(2) << static_cast<unsigned int>(byte);
std::cout << '\n';
}
if (port != 0)
std::cout << "port: " << std::dec << port << '\n';
else
std::cout << "port not specified\n";
}
void test(const std::string& input) {
std::cout << "input: " << input << '\n';
try {
address addr;
uint16_t port = 0;
parse_ip_address_and_port(input, addr, port);
print_address_and_port(addr, port);
} catch (const std::exception& ex) {
std::cout << "parsing failed\n";
}
std::cout << '\n';
}
int main(int argc, char** argv) {
test("127.0.0.1");
test("127.0.0.1:80");
test("::ffff:127.0.0.1");
test("::1");
test("[::1]:80");
test("1::80");
test("2605:2700:0:3::4713:93e3");
test("[2605:2700:0:3::4713:93e3]:80");
return 0;
}
- Output:
input: 127.0.0.1 address family: IPv4 address number: 7F000001 port not specified input: 127.0.0.1:80 address family: IPv4 address number: 7F000001 port: 80 input: ::ffff:127.0.0.1 address family: IPv6 address number: 00000000000000000000FFFF7F000001 port not specified input: ::1 address family: IPv6 address number: 00000000000000000000000000000001 port not specified input: [::1]:80 address family: IPv6 address number: 00000000000000000000000000000001 port: 80 input: 1::80 address family: IPv6 address number: 00010000000000000000000000000080 port not specified input: 2605:2700:0:3::4713:93e3 address family: IPv6 address number: 260527000000000300000000471393E3 port not specified input: [2605:2700:0:3::4713:93e3]:80 address family: IPv6 address number: 260527000000000300000000471393E3 port: 80
Erlang
#!/usr/bin/env escript
-module(ipparse).
-export([main/1]).
main([]) ->
[print(A, parse(A)) || A <- data()],
erlang:halt(0);
main(Args) ->
[print(A, parse(A)) || A <- Args],
erlang:halt(0).
-spec parse(Input :: string()) ->
{Family :: 'IPv6' | 'IPv4', Hex :: binary(), Port :: string()} |
{Family :: 'IPv6' | 'IPv4', Hex :: binary()}.
parse([$[ | Addr0]) ->
case string:split(Addr0, "]", trailing) of
[Addr] ->
{"IPv6", to_hex(inet:parse_address(Addr))};
[Addr, [$: | Port]] ->
{"IPv6", to_hex(inet:parse_address(Addr)), Port}
end;
parse(Addr0) ->
case inet:parse_address(Addr0) of
{error, einval} ->
[Addr, Port] = string:split(Addr0, ":", trailing),
{"IPv4", to_hex(inet:parse_address(Addr)), Port};
{ok, V6Addr} ->
{"IPv6", to_hex({ok, V6Addr})}
end.
-spec to_hex({ok, inet:ip_address()}) -> Hex :: binary().
to_hex({ok, {A,B,C,D}}) ->
binary:encode_hex(<<A:8, B:8, C:8, D:8>>);
to_hex({ok, {A,B,C,D,E,F,G,H}}) ->
binary:encode_hex(<<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>>).
print(Input, {Family, Hex, Port}) ->
io:format("Input: ~s~nFamily: ~s~nHex: ~s~nPort: ~s~n~n",
[Input, Family, Hex, Port]);
print(Input, {Family, Hex}) ->
io:format("Input: ~s~nFamily: ~s~nHex: ~s~n~n",
[Input, Family, Hex]).
data() ->
["127.0.0.1",
"127.0.0.1:80",
"::ffff:127.0.0.1",
"::1",
"[::1]:80",
"1::80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80"].
- Output:
Input: 127.0.0.1 Family: IPv6 Hex: 7F000001 Input: 127.0.0.1:80 Family: IPv4 Hex: 7F000001 Port: 80 Input: ::ffff:127.0.0.1 Family: IPv6 Hex: 00000000000000000000FFFF7F000001 Input: ::1 Family: IPv6 Hex: 00000000000000000000000000000001 Input: [::1]:80 Family: IPv6 Hex: 00000000000000000000000000000001 Port: 80 Input: 1::80 Family: IPv6 Hex: 00010000000000000000000000000080 Input: 2605:2700:0:3::4713:93e3 Family: IPv6 Hex: 260527000000000300000000471393E3 Input: [2605:2700:0:3::4713:93e3]:80 Family: IPv6 Hex: 260527000000000300000000471393E3 Port: 80
F#
// Parse IP addresses: Nigel Galloway. May 29th., 2021
open System.Text.RegularExpressions
type ipv6= Complete |Composite |Compressed |CompressedComposite
let ip4n,ip6i,ip6g,ip6e,ip6l=let n,g="[0-9a-fA-F]{1,4}","(25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]?[0-9])" in (
sprintf "^(%s)\.(%s)\.(%s)\.(%s)$" g g g g, sprintf "^(%s):(%s):(%s):(%s):(%s):(%s):(%s):(%s)$" n n n n n n n n,
sprintf "^((%s):)?((%s):)?((%s):)?((%s):)?((%s):)?((%s):)?(^|%s)::(%s|$)(:(%s))?(:(%s))?(:(%s))?(:(%s))?(:(%s))?(:(%s))?$" n n n n n n n n n n n n n n,
sprintf "^(%s):(%s):(%s):(%s):(%s):(%s):(%s)\.(%s)\.(%s)\.(%s)$" n n n n n n g g g g,
sprintf "^((%s):)?((%s):)?((%s):)?((%s):)?(^|%s)::((%s):)?((%s):)?((%s):)?((%s):)?((%s):)?(%s)\.(%s)\.(%s)\.(%s)$" n n n n n n n n n n g g g g)
let mn,mi,mg,me,ml=[2;4;6;8;10;12;13], [14..2..26], [2;4;6;8;9], [11..2..19], [20..5..35]
let fN(n:Match) g=g|>List.filter(fun(g:int)->n.Groups.[g].Length>0)
let fI n (g:Match)=n|>List.fold(fun Σ (n:int)->(Σ<<<16)+((int>>bigint)(sprintf "0x%s" g.Groups.[n].Value)))0I
let rec fG n g=let a="0123456789abcdef" in match bigint.DivRem(n,16I) with (n,r) when n=0I->a.[int r]::g|>Array.ofList|>System.String |(n,r)->fG n (a.[int r]::g)
let fE(m:Match) n g=(fN m n,fN m g)
let fL n (g:Match)=n|>List.fold(fun Σ (n:int)->(Σ<<<8)+int(g.Groups.[n].Value))0
let (|IP4 |_|) n=let g=Regex.Match(n,ip4n) in if g.Success then Some(fL [1..5..16] g) else None
let (|IP6n|_|) i=let g=Regex.Match(i,ip6i) in if g.Success then Some(fI [1..8] g) else None
let (|IP6i|_|) g=let g=Regex.Match(g,ip6g) in if g.Success then let n,l=fE g mn mi in (if n.Length+l.Length<8 then Some(((fI n g)<<<((8-n.Length)*16))+(fI l g)) else None) else None
let (|IP6g|_|) e=let g=Regex.Match(e,ip6e) in if g.Success then Some(((fI [1..6] g)<<<32)+bigint(fL [7..5..22] g)) else None
let (|IP6e|_|) l=let g=Regex.Match(l,ip6l) in if g.Success then let n,l=fE g mg me in (if n.Length+l.Length<6 then Some(((fI n g)<<<((8-n.Length)*16))+((fI l g)<<<32)+bigint(fL ml g)) else None) else None
let (|IP6l|_|) n=match n with IP6n n->Some(Complete,fG n []) |IP6i n->Some(Compressed,fG n []) |IP6g n->Some(Composite,fG n []) |IP6e n->Some(CompressedComposite,fG n []) |_->None
let (|IP4p|_|) n=let g=Regex.Match(n,"^(.+):(\d{1,4})$") in if g.Success then match g.Groups.[1].Value with IP4 n->Some(n,int g.Groups.[2].Value) |_->None else None
let (|IP6p|_|) n=let g=Regex.Match(n,"^\[(.+)\]:(\d{1,4})$") in if g.Success then match g.Groups.[1].Value with IP6l n->Some(n,int g.Groups.[2].Value) |_->None else None
let pIP n=match n with IP6p((t,g),p)->printfn "%s is a %A IPv6 address value 0x%s using port %d" n t g p
|IP4 g->printfn "%s is an IPv4 address value %0x" n g
|IP6l(t,g)->printfn "%s is a %A IPv6 address value 0x%s" n t g
|IP4p(g,p)->printfn "%s is an IPv4 address value %0x using port %d" n g p
|_->printfn "%s not matched" n
["127.0.0.1";"127.0.0.1:80";"2605:2700:0:3::4713:93e3";"::1";"[::1]:80";"2605:2700:0:3::4713:93e3";"[2605:2700:0:3::4713:93e3]:80";
"::ffff:127.0.0.1";"1:2:3:4:5:6:7:8";"1:2:3:4:5:6:7:8:9";"1:2:3:4:5:6:127.0.0.1"]|>List.iter pIP
- Output:
127.0.0.1 is an IPv4 address value 7f000001 127.0.0.1:80 is an IPv4 address value 7f000001 using port 80 2605:2700:0:3::4713:93e3 is a Compressed IPv6 address value 0x260527000000000300000000471393e3 ::1 is a Compressed IPv6 address value 0x1 [::1]:80 is a Compressed IPv6 address value 0x1 using port 80 2605:2700:0:3::4713:93e3 is a Compressed IPv6 address value 0x260527000000000300000000471393e3 [2605:2700:0:3::4713:93e3]:80 is a Compressed IPv6 address value 0x260527000000000300000000471393e3 using port 80 ::ffff:127.0.0.1 is a CompressedComposite IPv6 address value 0xffff7f000001 1:2:3:4:5:6:7:8 is a Complete IPv6 address value 0x10002000300040005000600070008 1:2:3:4:5:6:7:8:9 not matched 1:2:3:4:5:6:127.0.0.1 is a Composite IPv6 address value 0x1000200030004000500067f000001
FreeBASIC
Function isNumericString(s As String) As Boolean
For i As Integer = 1 To Len(s)
Dim c As String = Mid(s, i, 1)
If c < "0" Or c > "9" Then Return False
Next
Return True
End Function
Function isHexString(s As String) As Boolean
For i As Integer = 1 To Len(s)
Dim c As String = Mid(s, i, 1)
If Not ((c >= "0" And c <= "9") Or (c >= "a" And c <= "f") Or (c >= "A" And c <= "F")) Then Return False
Next
Return True
End Function
Function Split(text As String, delimiter As String, arr() As String) As Integer
If Len(text) = 0 Then Return 0
Dim As Integer cnt = 0, posic = 0, lastPos = 0
Redim arr(8) ' Pre-allocate array with sufficient size
Do
posic = Instr(lastPos + 1, text, delimiter)
If posic = 0 Then
If lastPos < Len(text) Then
arr(cnt) = Mid(text, lastPos + 1)
cnt += 1
End If
Exit Do
End If
arr(cnt) = Mid(text, lastPos + 1, posic - lastPos - 1)
cnt += 1
lastPos = posic
Loop
Return cnt
End Function
Function parseIP(addr As String) As String
Dim As String result = "IP address : " & addr & !"\n"
Dim As String parts(8), ipParts(8)
Dim As Integer cnt, i
Dim As String port = "not specified"
' Check if it's an IPv4 address
cnt = Split(addr, ":", parts())
' IPv4 processing
cnt = Split(parts(0), ".", ipParts())
If cnt = 4 Then
Dim As String hexa = ""
Dim As Boolean valid = True
For i = 0 To 3
Dim As Integer value = Valint(ipParts(i))
If value >= 0 Andalso value <= 255 Then
hexa &= Right("0" & Hex(value), 2)
Else
valid = False
Exit For
End If
Next
If valid Then
result &= "Address : " & hexa & !"\n"
result &= "Address Space: IPv4" & !"\n"
If Len(parts(1)) > 0 Then
Dim As Integer portVal = Valint(parts(1))
If portVal >= 0 Andalso portVal <= 65535 Then
result &= "Port : " & parts(1) & !"\n"
End If
Else
result &= "Port : not specified" & !"\n"
End If
Return result
End If
End If
' Check if it's an IPv6 address
If Instr(addr, ":") > 0 Then
Dim As String ipv6Addr = addr
If Left(addr, 1) = "[" Then
Dim As Integer endBracket = Instr(addr, "]")
If endBracket > 0 Then
ipv6Addr = Mid(addr, 2, endBracket - 2)
If endBracket < Len(addr) Then
port = Mid(addr, endBracket + 2)
End If
End If
End If
' Special handling for IPv4-mapped IPv6 addresses
If Instr(ipv6Addr, "::ffff:") > 0 Then
Dim As String ipv4Part = Mid(ipv6Addr, Instr(ipv6Addr, "::ffff:") + 7)
cnt = Split(ipv4Part, ".", ipParts())
If cnt = 4 Then
Dim As String hexa = "FFFF"
Dim As Boolean valid = True
For i = 0 To 3
Dim As Integer value = Valint(ipParts(i))
If value >= 0 Andalso value <= 255 Then
hexa &= Right("0" & Hex(value), 2)
Else
valid = False
Exit For
End If
Next
If valid Then
result &= "Address : " & hexa & !"\n"
result &= "Address Space: IPv6" & !"\n"
result &= "Port : " & port & !"\n"
Return result
End If
End If
' If IPv4 part is invalid, return invalid address
Return result & "Address : Invalid Address" & !"\n"
End If
cnt = Split(ipv6Addr, ":", ipParts())
If cnt > 0 Then
Dim As String hexa = ""
Dim As Integer emptyIndex = -1
' Find :: position
For i = 0 To cnt - 1
If Len(ipParts(i)) = 0 Then
emptyIndex = i
Exit For
End If
Next
' Process parts before ::
For i = 0 To emptyIndex - 1
hexa &= Right("0000" & ipParts(i), 4)
Next
' Fill middle with zeros
If emptyIndex >= 0 Then
Dim As Integer zerosNeeded = 8 - (cnt - 1)
hexa &= String(zerosNeeded * 4, "0")
End If
' Process parts after ::
For i = emptyIndex + 1 To cnt - 1
hexa &= Right("0000" & ipParts(i), 4)
Next
result &= "Address : " & hexa & !"\n"
result &= "Address Space: IPv6" & !"\n"
result &= "Port : " & port & !"\n"
Return result
End If
End If
Return result & "Address : Invalid Address" & !"\n"
End Function
' Test cases
Dim As String ipAddresses(0 To ...) = { _
"127.0.0.1", "127.0.0.1:80", "::1", "[::1]:80", "2605:2700:0:3::4713:93e3", _
"[2605:2700:0:3::4713:93e3]:80", "::ffff:192.168.173.22", _
"[::ffff:192.168.173.22]:80", _
"1::", "::", "256.0.0.0", "::ffff:127.0.0.0.1", "RosettaCode" }
For i As Byte = 0 To Ubound(ipAddresses)
Print parseIP(ipAddresses(i))
Next
Sleep
- Output:
IP address : 127.0.0.1 Address : 7F000001 Address Space: IPv4 Port : not specified IP address : 127.0.0.1:80 Address : 7F000001 Address Space: IPv4 Port : 80 IP address : ::1 Address : 00000000000000000000000000000001 Address Space: IPv6 Port : not specified IP address : [::1]:80 Address : 00000000000000000000000000000001 Address Space: IPv6 Port : 80 IP address : 2605:2700:0:3::4713:93e3 Address : 260527000000000300000000471393e3 Address Space: IPv6 Port : not specified IP address : [2605:2700:0:3::4713:93e3]:80 Address : 260527000000000300000000471393e3 Address Space: IPv6 Port : 80 IP address : ::ffff:192.168.173.22 Address : FFFFC0A8AD16 Address Space: IPv6 Port : not specified IP address : [::ffff:192.168.173.22]:80 Address : FFFFC0A8AD16 Address Space: IPv6 Port : 80 IP address : 1:: Address : 00010000000000000000000000000000 Address Space: IPv6 Port : not specified IP address : :: Address : 00000000000000000000000000000000 Address Space: IPv6 Port : not specified IP address : 256.0.0.0 Address : Invalid Address IP address : ::ffff:127.0.0.0.1 Address : Invalid Address IP address : RosettaCode Address : Invalid Address
Go
package main
import (
"encoding/hex"
"fmt"
"io"
"net"
"os"
"strconv"
"strings"
"text/tabwriter"
)
// parseIPPort parses an IP with an optional port, returning an IP and a port (or nil
// if no port was present in the given address).
func parseIPPort(address string) (net.IP, *uint64, error) {
ip := net.ParseIP(address)
if ip != nil {
return ip, nil, nil
}
host, portStr, err := net.SplitHostPort(address)
if err != nil {
return nil, nil, fmt.Errorf("splithostport failed: %w", err)
}
port, err := strconv.ParseUint(portStr, 10, 16)
if err != nil {
return nil, nil, fmt.Errorf("failed to parse port: %w", err)
}
ip = net.ParseIP(host)
if ip == nil {
return nil, nil, fmt.Errorf("failed to parse ip address")
}
return ip, &port, nil
}
func ipVersion(ip net.IP) int {
if ip.To4() == nil {
return 6
}
return 4
}
func main() {
testCases := []string{
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:443",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80",
}
w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
writeTSV := func(w io.Writer, args ...interface{}) {
fmt.Fprintf(w, strings.Repeat("%s\t", len(args)), args...)
fmt.Fprintf(w, "\n")
}
writeTSV(w, "Input", "Address", "Space", "Port")
for _, addr := range testCases {
ip, port, err := parseIPPort(addr)
if err != nil {
panic(err)
}
portStr := "n/a"
if port != nil {
portStr = fmt.Sprint(*port)
}
ipVersion := fmt.Sprintf("IPv%d", ipVersion(ip))
writeTSV(w, addr, hex.EncodeToString(ip), ipVersion, portStr)
}
w.Flush()
}
- Output:
Input Address Space Port 127.0.0.1 00000000000000000000ffff7f000001 IPv4 127.0.0.1:80 00000000000000000000ffff7f000001 IPv4 80 ::1 00000000000000000000000000000001 IPv6 [::1]:443 00000000000000000000000000000001 IPv6 443 2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 IPv6 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 IPv6 80
Haskell
import Data.List (isInfixOf)
import Numeric (showHex)
import Data.Char (isDigit)
data IPChunk = IPv6Chunk String | IPv4Chunk (String, String) |
IPv6WithPort [IPChunk] String | IPv6NoPort [IPChunk] |
IPv4WithPort IPChunk String | IPv4NoPort IPChunk |
IPInvalid | IPZeroSection | IPUndefinedWithPort String |
IPUndefinedNoPort
instance Show IPChunk where
show (IPv6Chunk a) = a
show (IPv4Chunk (a,b)) = a ++ b
show (IPv6WithPort a p) = "IPv6 " ++ concatMap show a ++ " port " ++ p
show (IPv6NoPort a) = "IPv6 " ++ concatMap show a ++ " no port"
show (IPv4WithPort a p) = "IPv4 " ++ show a ++ " port " ++ p
show (IPv4NoPort a) = "IPv4 " ++ show a
show IPInvalid = "Invalid IP address"
isIPInvalid IPInvalid = True
isIPInvalid _ = False
isIPZeroSection IPZeroSection = True
isIPZeroSection _ = False
splitOn _ [] = []
splitOn x xs = let (a, b) = break (== x) xs in a : splitOn x (drop 1 b)
count x = length . filter (== x)
between a b x = x >= a && x <= b
none f = all (not . f)
parse1 [] = IPInvalid
parse1 "::" = IPUndefinedNoPort
parse1 ('[':':':':':']':':':ps) = if portIsValid ps then IPUndefinedWithPort ps else IPInvalid
parse1 ('[':xs) = if "]:" `isInfixOf` xs
then let (a, b) = break (== ']') xs in
if tail b == ":" then IPInvalid else IPv6WithPort (map chunk (splitOn ':' a)) (drop 2 b)
else IPInvalid
parse1 xs
| count ':' xs <= 1 && count '.' xs == 3 =
let (a, b) = break (== ':') xs in case b of
"" -> IPv4NoPort (chunk a)
(':':ps) -> IPv4WithPort (chunk a) ps
_ -> IPInvalid
| count ':' xs > 1 && count '.' xs <= 3 =
IPv6NoPort (map chunk (splitOn ':' xs))
chunk [] = IPZeroSection
chunk xs
| '.' `elem` xs = case splitOn '.' xs of
[a,b,c,d] -> let [e,f,g,h] = map read [a,b,c,d]
in if all (between 0 255) [e,f,g,h]
then let [i,j,k,l] = map (\n -> fill 2 $ showHex n "") [e,f,g,h]
in IPv4Chunk (i ++ j, k ++ l)
else IPInvalid
| ':' `notElem` xs && between 1 4 (length xs) && all (`elem` "0123456789abcdef") xs = IPv6Chunk (fill 4 xs)
| otherwise = IPInvalid
fill n xs = replicate (n - length xs) '0' ++ xs
parse2 IPInvalid = IPInvalid
parse2 (IPUndefinedWithPort p) = IPv6WithPort (replicate 8 zeroChunk) p
parse2 IPUndefinedNoPort = IPv6NoPort (replicate 8 zeroChunk)
parse2 a = case a of
IPv6WithPort xs p -> if none isIPInvalid xs && portIsValid p
then let ys = complete xs
in if countChunks ys == 8
then IPv6WithPort ys p
else IPInvalid
else IPInvalid
IPv6NoPort xs -> if none isIPInvalid xs
then let ys = complete xs
in if countChunks ys == 8
then IPv6NoPort ys
else IPInvalid
else IPInvalid
IPv4WithPort (IPv4Chunk a) p -> if portIsValid p
then IPv4WithPort (IPv4Chunk a) p
else IPInvalid
IPv4NoPort (IPv4Chunk a) -> IPv4NoPort (IPv4Chunk a)
_ -> IPInvalid
zeroChunk = IPv6Chunk "0000"
portIsValid a = all isDigit a && between 0 65535 (read a)
complete xs = case break isIPZeroSection xs of
(_, [IPZeroSection]) -> []
(ys, []) -> ys
([], (IPZeroSection:IPZeroSection:ys)) -> if any isIPZeroSection ys || countChunks ys > 7
then []
else replicate (8 - countChunks ys) zeroChunk ++ ys
(ys, (IPZeroSection:zs)) -> if any isIPZeroSection zs || countChunks ys + countChunks zs > 7
then []
else ys ++ replicate (8 - countChunks ys - countChunks zs) zeroChunk ++ zs
_ -> []
countChunks xs = foldl f 0 xs
where f n (IPv4Chunk _) = n + 2
f n (IPv6Chunk _) = n + 1
ip = parse2 . parse1
main = mapM_ (putStrLn . show . ip)
["127.0.0.1", -- loop back
"127.0.0.1:80", -- loop back +port
"::1", -- loop back
"[::1]:80", -- loop back +port
"2605:2700:0:3::4713:93e3", -- Rosetta Code
"[2605:2700:0:3::4713:93e3]:80"] -- Rosetta Code
Output:
IPv4 7f000001 IPv4 7f000001 port 80 IPv6 00000000000000000000000000000001 no port IPv6 00000000000000000000000000000001 port 80 IPv6 260527000000000300000000471393e3 no port IPv6 260527000000000300000000471393e3 port 80
Icon and Unicon
printf.icn provides the printf family hexcvt.icn provides hex and hexstring
Output:
192.168.0.1 is the IPv4 address = x'c0a80001' 127.0.0.1 is the IPv4 address = x'7f000001' 127.0.0.1:80 is the IPv4 address = x'7f000001' port=80 2001:db8:85a3:0:0:8a2e:370:7334 is the IPv6 address = x'20010db885a3000000008a2e03707334' 2001:db8:85a3::8a2e:370:7334 is the IPv6 address = x'20010db885a3000000008a2e03707334' ::1 is the IPv6 address = x'00000000000000000000000000000001' [::1]:80 is the IPv6 address = x'00000000000000000000000000000001' port=80 :: is the IPv6 address = x'00000000000000000000000000000000' ::ffff:192.168.0.1 is the IPv6 address = x'00000000000000000000ffffc0a80001' 2605:2700:0:3::4713:93e3 is the IPv6 address = x'260527000000000300000000471393e3' [2605:2700:0:3::4713:93e3]:80 is the IPv6 address = x'260527000000000300000000471393e3' port=80 ::ffff:71.19.147.227 is the IPv6 address = x'00000000000000000000ffff471393e3' [::ffff:71.19.147.227]:80 is the IPv6 address = x'00000000000000000000ffff471393e3' port=80 [2001:db8:85a3:8d3:1319:8a2e:370:7348]:443 is the IPv6 address = x'20010db885a308d313198a2e03707348' port=443 256.0.0.0 is not a valid IP address g::1 is not an IP address
J
Implementation:
parseaddr=:3 :0
if. '.' e. y do.
if. +./'::' E. y do.
parsehybrid y
else.
parseipv4 y
end.
else.
parseipv6 y
end.
)
parseipv4=:3 :0
'addr port'=. 2{.<;._2 y,'::'
4,((4#256)#._&".;._1'.',addr),_".port
)
parseipv6=:3 :0
'addr port'=. 2{.<;._2 (y-.'['),']]'
split=. I. '::' E. addr
a1=. 8{. dfh;._2 (split {. addr),8#':'
a2=._8{. dfh;._1 (8#':'),split }. addr
6,(65536x#.a1+a2),_".port-.':'
)
parsehybrid=:3 :0
'kludge port'=. 2{.<;._2 (tolower y-.'['),']]'
addr=. _1 {:: <;._2 kludge,':'
assert. (kludge-:'::ffff:',addr) +. kludge-: '::',addr
6,(16bffff00000000+1{parseipv4 addr),_".port-.':'
)
fmt=:3 :0
port=. ''
((#y){.'v';'addr';'port')=. y
'ipv',(":v),' ',(hfd addr),(#port)#' ',":port
)
Task examples:
fmt parseaddr '127.0.0.1'
ipv4 7f000001
fmt parseaddr '127.0.0.1:80'
ipv4 7f000001 80
fmt parseaddr '::1'
ipv6 1
fmt parseaddr '[::1]:80'
ipv6 1 80
fmt parseaddr '2605:2700:0:3::4713:93e3'
ipv6 260527000000000300000000471393e3
fmt parseaddr '[2605:2700:0:3::4713:93e3]:80'
ipv6 260527000000000300000000471393e3 80
The intermediate (unformatted) result from parseaddr is the protocol number (4 or 6), the address and optionally the port:
parseaddr '127.0.0.1'
4 2130706433
parseaddr '127.0.0.1:80'
4 2130706433 80
parseaddr '::1'
6 1
parseaddr '[::1]:80'
6 1 80
parseaddr '2605:2700:0:3::4713:93e3'
6 50537416338094019778974086937420469219
parseaddr '[2605:2700:0:3::4713:93e3]:80'
6 50537416338094019778974086937420469219 80
Java
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ParseIPAddress {
public static void main(String[] args) {
String [] tests = new String[] {"192.168.0.1", "127.0.0.1", "256.0.0.1", "127.0.0.1:80", "::1", "[::1]:80", "[32e::12f]:80", "2605:2700:0:3::4713:93e3", "[2605:2700:0:3::4713:93e3]:80", "2001:db8:85a3:0:0:8a2e:370:7334"};
System.out.printf("%-40s %-32s %s%n", "Test Case", "Hex Address", "Port");
for ( String ip : tests ) {
try {
String [] parsed = parseIP(ip);
System.out.printf("%-40s %-32s %s%n", ip, parsed[0], parsed[1]);
}
catch (IllegalArgumentException e) {
System.out.printf("%-40s Invalid address: %s%n", ip, e.getMessage());
}
}
}
private static final Pattern IPV4_PAT = Pattern.compile("^(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)(?::(\\d+)){0,1}$");
private static final Pattern IPV6_DOUBL_COL_PAT = Pattern.compile("^\\[{0,1}([0-9a-f:]*)::([0-9a-f:]*)(?:\\]:(\\d+)){0,1}$");
private static String ipv6Pattern;
static {
ipv6Pattern = "^\\[{0,1}";
for ( int i = 1 ; i <= 7 ; i ++ ) {
ipv6Pattern += "([0-9a-f]+):";
}
ipv6Pattern += "([0-9a-f]+)(?:\\]:(\\d+)){0,1}$";
}
private static final Pattern IPV6_PAT = Pattern.compile(ipv6Pattern);
private static String[] parseIP(String ip) {
String hex = "";
String port = "";
// IPV4
Matcher ipv4Matcher = IPV4_PAT.matcher(ip);
if ( ipv4Matcher.matches() ) {
for ( int i = 1 ; i <= 4 ; i++ ) {
hex += toHex4(ipv4Matcher.group(i));
}
if ( ipv4Matcher.group(5) != null ) {
port = ipv4Matcher.group(5);
}
return new String[] {hex, port};
}
// IPV6, double colon
Matcher ipv6DoubleColonMatcher = IPV6_DOUBL_COL_PAT.matcher(ip);
if ( ipv6DoubleColonMatcher.matches() ) {
String p1 = ipv6DoubleColonMatcher.group(1);
if ( p1.isEmpty() ) {
p1 = "0";
}
String p2 = ipv6DoubleColonMatcher.group(2);
if ( p2.isEmpty() ) {
p2 = "0";
}
ip = p1 + getZero(8 - numCount(p1) - numCount(p2)) + p2;
if ( ipv6DoubleColonMatcher.group(3) != null ) {
ip = "[" + ip + "]:" + ipv6DoubleColonMatcher.group(3);
}
}
// IPV6
Matcher ipv6Matcher = IPV6_PAT.matcher(ip);
if ( ipv6Matcher.matches() ) {
for ( int i = 1 ; i <= 8 ; i++ ) {
hex += String.format("%4s", toHex6(ipv6Matcher.group(i))).replace(" ", "0");
}
if ( ipv6Matcher.group(9) != null ) {
port = ipv6Matcher.group(9);
}
return new String[] {hex, port};
}
throw new IllegalArgumentException("ERROR 103: Unknown address: " + ip);
}
private static int numCount(String s) {
return s.split(":").length;
}
private static String getZero(int count) {
StringBuilder sb = new StringBuilder();
sb.append(":");
while ( count > 0 ) {
sb.append("0:");
count--;
}
return sb.toString();
}
private static String toHex4(String s) {
int val = Integer.parseInt(s);
if ( val < 0 || val > 255 ) {
throw new IllegalArgumentException("ERROR 101: Invalid value : " + s);
}
return String.format("%2s", Integer.toHexString(val)).replace(" ", "0");
}
private static String toHex6(String s) {
int val = Integer.parseInt(s, 16);
if ( val < 0 || val > 65536 ) {
throw new IllegalArgumentException("ERROR 102: Invalid hex value : " + s);
}
return s;
}
}
- Output:
Test Case Hex Address Port 192.168.0.1 c0a80001 127.0.0.1 7f000001 256.0.0.1 Invalid address: ERROR 101: Invalid value : 256 127.0.0.1:80 7f000001 80 ::1 00000000000000000000000000000001 [::1]:80 00000000000000000000000000000001 80 [32e::12f]:80 032e000000000000000000000000012f 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 80 2001:db8:85a3:0:0:8a2e:370:7334 20010db885a3000000008a2e03707334
jq
Works with gojq, the Go implementation of jq.
Adapted from Wren
# Generic preliminaries
# To take advantage of gojq's arbitrary-precision integer arithmetic:
def power($b): . as $in | reduce range(0;$b) as $i (1; . * $in);
# To take advantage of gojq's arbitrary-precision integer arithmetic:
# if the input and $j are integers, then the result will be an integer.
def div($j):
(. - (. % j)) / $j;
# integer to stream of 0s and 1s, least significant bit first
def bitwise:
recurse( if . >= 2 then div(2) else empty end) | . % 2;
# inverse of `bitwise`
def stream_to_integer(stream):
reduce stream as $c ( {power:1 , ans: 0};
.ans += ($c * .power) | .power *= 2 )
| .ans;
# Input determines the max number of bits to be retained
# $x and $y are two integers
def xorBits($x;$y):
def lxor(a;b):
if (a==1 or b==1) and ((a==1 and b==1)|not) then 1
elif a == null then b
elif b == null then a
else 0
end;
if $x == 0 then $y
elif $y == 0 then $x
else
[if . then limit(.; $x|bitwise) else $x|bitwise end] as $s
| [if . then limit(.; $y|bitwise) else $y|bitwise end] as $t
| stream_to_integer(
range(0; [($s|length), ($t|length)] | max) as $i
| lxor($s[$i]; $t[$i]) )
end ;
# $x and $y are two integers
def xor($x;$y):
null | xorBits($x;$y);
def count(stream): reduce stream as $i (0; .+1);
# Input: an array
def insert($i; $x): .[:$i] + [$x] + .[$i:];
# Input: a non-negative integer
def tobase($b):
def digit: "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[.:.+1];
def mod: . % $b;
def div: ((. - mod) / $b);
def digits: recurse( select(. > 0) | div) | mod ;
# For jq it would be wise to protect against `infinite` as input, but using `isinfinite` confuses gojq
select( (tostring|test("^[0-9]+$")) and 2 <= $b and $b <= 36)
| if . == 0 then "0"
else [digits | digit] | reverse[1:] | add
end;
# Input: a string in base $b
# Output: its decimal value
def frombase($b):
def decimalValue:
if 48 <= . and . <= 57 then . - 48
elif 65 <= . and . <= 90 then . - 55 # (10+.-65)
elif 97 <= . and . <= 122 then . - 87 # (10+.-97)
else "decimalValue <- \(.)" | error
end;
reduce (explode|reverse[]|decimalValue) as $x ({p:1};
.value += (.p * $x)
| .p *= $b)
| .value ;
### Parse an IP address
# An IPAddress is represented by an object {"address", "addressSpace", "port"}
# where addressSpace is one of "IPv4", "IPv6", "Invalid"
# and a port of -1 denotes 'not specified'.
def INVALID: {address: 0, addressSpace: "Invalid", port: 0};
def ipAddressParse:
# Helper for octet1
# Assumes .len == (.hextets|length)
def fixhextets:
.insertions = (8 - .len)
| .i = 0
| until(.i == 8;
if .hextets[.i] == ""
then .hextets[.i] = "0"
| until( .insertions <= 0;
.insertions += -1
| .i as $i
| .hextets |= insert($i; "0") )
| .i = 8
else .i += 1
end ) ;
# Handle the case when octet length is 4
def octet4:
(.octets[0] | split(":")) as $split
| if $split|length == 2
then ($split[1]|tonumber? // null) as $temp
| if $temp | (. == null or . < 0 or . > 65535)
then .return = INVALID
else .port = $temp
| .octets[0] = $split[0]
end
else .
end
| if .return then .
else reduce range(0;4) as $i (.;
if .return then .
else (.octets[$i] | tonumber? // null) as $num
| if $num | (. == null or . < 0 or . > 255) then .return = INVALID
else .address = xor(.address; $num * (2 | power($i * 8)))
end
end)
end
| if .return then .
elif .trans
then .address += 281470681743360 # "ffff00000000"
else .
end ;
# Handle the case when octet length is 1
def octet1:
.addressSpace = "IPv6"
| if .ipa[0:1] == "["
then .ipa |= .[1:]
| (.ipa | split("]:")) as $split
| if $split|length != 2 then .return = INVALID
else ($split[1] | tonumber? // null) as $temp
| if $temp | (. == null or . < 0 or . > 65535) then .return = INVALID
else .port = $temp
| .ipa |= .[0: (-2 - ($split[1]|length))]
end
end
else .
end
| if .return then .
else .hextets = (.ipa | split(":")|reverse)
| .len = (.hextets|length)
| if .ipa|startswith("::")
then .hextets[-1] = "0"
elif .ipa|endswith("::")
then .hextets[0] = "0"
else .
end
| if .ipa == "::" then .hextets[1] = "0" else . end
| if .len > 8 or (.len == 8 and any(.hextets[]; . == "")) or count(.hextets[] | select(. == "")) > 1
then .return = INVALID
else .
end
end
| if .return then .
elif .len < 8
then fixhextets
else .
end
| if .return then .
else reduce range(0; 8) as $j (.;
if .return then .
else (.hextets[$j] | frombase(16)) as $num
| if $num > 65535 then .return = INVALID
else .address = xor(.address; $num * (2 | power($j * 16)))
end
end)
end ;
{ addressSpace: "IPv4",
ipa: ascii_downcase,
port: -1,
trans: false }
| if (.ipa|startswith("::ffff:")) and (.ipa|test("[.]"))
then .addressSpace = "IPv6"
| .trans = true
| .ipa |= .[7:]
elif (.ipa|startswith("[::ffff:")) and (.ipa|test("[.]"))
then .addressSpace = "IPv6"
| .trans = true
| .ipa |= (.[8:] | gsub("]";""))
else .
end
| .octets = (.ipa | split(".") | reverse)
| .address = 0
| if .octets|length == 4
then octet4
elif .octets|length == 1
then octet1
else .return = INVALID
end
| if .return then .return
else {address, addressSpace, port}
end ;
# Examples
def ipas:
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80",
"::ffff:192.168.173.22",
"[::ffff:192.168.173.22]:80",
"1::",
"::",
"256.0.0.0",
"::ffff:127.0.0.0.1"
;
ipas
| "IP address : \(.)",
( ipAddressParse
| "Address : \(.address|tobase(16))",
"Address Space : \(.addressSpace)",
"Port : \(if .port == -1 then "not specified" else .port end)",
""
)Invocation: gojq -nr -f parse-an-ip-address.jq
- Output:
Exactly as for Wren
Julia
const testdata = ["127.0.0.1", "127.0.0.1:80", "::1", "[::1]:80",
"2605:2700:0:3::4713:93e3", "[2605:2700:0:3::4713:93e3]:80",
"::ffff:192.168.173.22", "[::ffff:192.168.173.22]:80",
"1::", "[1::]:80", "::", "[::]:80"]
maybev4(ip) = search(ip, '.') > 0 && length(matchall(r":", ip)) < 2
maybev6(ip) = length(matchall(r":", ip)) > 1
function parseip(ip)
if (mat = match(r"^\[([:.\da-fA-F]+)\]:(\d+)$", ip))!= nothing ||
(mat = match(r"^([\d.]+)[:/](\d+)$", ip)) != nothing
port = mat.captures[2]
ip = mat.captures[1]
else
port = "none"
end
if maybev4(ip)
println("Processing ip v4 $ip")
iphex = hex(Int(Base.IPv4(ip)))
addresspace = "IPv4"
elseif maybev6(ip)
println("Processing ip v6 $ip")
iphex = hex(UInt128(Base.IPv6(ip)))
addresspace = "IPv6"
else
throw("Bad IP address argument $ip")
end
iphex, addresspace, port
end
for ip in testdata
hx, add, por = parseip(ip)
println("For input $ip, IP in hex is $hx, address space $add, port $por.")
end
- Output:
Processing ip v4 127.0.0.1 For input 127.0.0.1, IP in hex is 7f000001, address space IPv4, port none. Processing ip v4 127.0.0.1 For input 127.0.0.1:80, IP in hex is 7f000001, address space IPv4, port 80. Processing ip v6 ::1 For input ::1, IP in hex is 1, address space IPv6, port none. Processing ip v6 ::1 For input [::1]:80, IP in hex is 1, address space IPv6, port 80. Processing ip v6 2605:2700:0:3::4713:93e3 For input 2605:2700:0:3::4713:93e3, IP in hex is 260527000000000300000000471393e3, address space IPv6, port none. Processing ip v6 2605:2700:0:3::4713:93e3 For input [2605:2700:0:3::4713:93e3]:80, IP in hex is 260527000000000300000000471393e3, address space IPv6, port 80. Processing ip v6 ::ffff:192.168.173.22 For input ::ffff:192.168.173.22, IP in hex is ffffc0a8ad16, address space IPv6, port none. Processing ip v6 ::ffff:192.168.173.22 For input [::ffff:192.168.173.22]:80, IP in hex is ffffc0a8ad16, address space IPv6, port 80. Processing ip v6 1:: For input 1::, IP in hex is 10000000000000000000000000000, address space IPv6, port none. Processing ip v6 1:: For input [1::]:80, IP in hex is 10000000000000000000000000000, address space IPv6, port 80. Processing ip v6 :: For input ::, IP in hex is 0, address space IPv6, port none. Processing ip v6 :: For input [::]:80, IP in hex is 0, address space IPv6, port 80.
Kotlin
// version 1.1.3
import java.math.BigInteger
enum class AddressSpace { IPv4, IPv6, Invalid }
data class IPAddressComponents(
val address: BigInteger,
val addressSpace: AddressSpace,
val port: Int // -1 denotes 'not specified'
)
val INVALID = IPAddressComponents(BigInteger.ZERO, AddressSpace.Invalid, 0)
fun ipAddressParse(ipAddress: String): IPAddressComponents {
var addressSpace = AddressSpace.IPv4
var ipa = ipAddress.toLowerCase()
var port = -1
var trans = false
if (ipa.startsWith("::ffff:") && '.' in ipa) {
addressSpace = AddressSpace.IPv6
trans = true
ipa = ipa.drop(7)
}
else if (ipa.startsWith("[::ffff:") && '.' in ipa) {
addressSpace = AddressSpace.IPv6
trans = true
ipa = ipa.drop(8).replace("]", "")
}
val octets = ipa.split('.').reversed().toTypedArray()
var address = BigInteger.ZERO
if (octets.size == 4) {
val split = octets[0].split(':')
if (split.size == 2) {
val temp = split[1].toIntOrNull()
if (temp == null || temp !in 0..65535) return INVALID
port = temp
octets[0] = split[0]
}
for (i in 0..3) {
val num = octets[i].toLongOrNull()
if (num == null || num !in 0..255) return INVALID
val bigNum = BigInteger.valueOf(num)
address = address.or(bigNum.shiftLeft(i * 8))
}
if (trans) address += BigInteger("ffff00000000", 16)
}
else if (octets.size == 1) {
addressSpace = AddressSpace.IPv6
if (ipa[0] == '[') {
ipa = ipa.drop(1)
val split = ipa.split("]:")
if (split.size != 2) return INVALID
val temp = split[1].toIntOrNull()
if (temp == null || temp !in 0..65535) return INVALID
port = temp
ipa = ipa.dropLast(2 + split[1].length)
}
val hextets = ipa.split(':').reversed().toMutableList()
val len = hextets.size
if (ipa.startsWith("::"))
hextets[len - 1] = "0"
else if (ipa.endsWith("::"))
hextets[0] = "0"
if (ipa == "::") hextets[1] = "0"
if (len > 8 || (len == 8 && hextets.any { it == "" }) || hextets.count { it == "" } > 1)
return INVALID
if (len < 8) {
var insertions = 8 - len
for (i in 0..7) {
if (hextets[i] == "") {
hextets[i] = "0"
while (insertions-- > 0) hextets.add(i, "0")
break
}
}
}
for (j in 0..7) {
val num = hextets[j].toLongOrNull(16)
if (num == null || num !in 0x0..0xFFFF) return INVALID
val bigNum = BigInteger.valueOf(num)
address = address.or(bigNum.shiftLeft(j * 16))
}
}
else return INVALID
return IPAddressComponents(address, addressSpace, port)
}
fun main(args: Array<String>) {
val ipas = listOf(
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80",
"::ffff:192.168.173.22",
"[::ffff:192.168.173.22]:80",
"1::",
"::",
"256.0.0.0",
"::ffff:127.0.0.0.1"
)
for (ipa in ipas) {
val (address, addressSpace, port) = ipAddressParse(ipa)
println("IP address : $ipa")
println("Address : ${"%X".format(address)}")
println("Address Space : $addressSpace")
println("Port : ${if (port == -1) "not specified" else port.toString()}")
println()
}
}
- Output:
IP address : 127.0.0.1 Address : 7F000001 Address Space : IPv4 Port : not specified IP address : 127.0.0.1:80 Address : 7F000001 Address Space : IPv4 Port : 80 IP address : ::1 Address : 1 Address Space : IPv6 Port : not specified IP address : [::1]:80 Address : 1 Address Space : IPv6 Port : 80 IP address : 2605:2700:0:3::4713:93e3 Address : 260527000000000300000000471393E3 Address Space : IPv6 Port : not specified IP address : [2605:2700:0:3::4713:93e3]:80 Address : 260527000000000300000000471393E3 Address Space : IPv6 Port : 80 IP address : ::ffff:192.168.173.22 Address : FFFFC0A8AD16 Address Space : IPv6 Port : not specified IP address : [::ffff:192.168.173.22]:80 Address : FFFFC0A8AD16 Address Space : IPv6 Port : 80 IP address : 1:: Address : 10000000000000000000000000000 Address Space : IPv6 Port : not specified IP address : :: Address : 0 Address Space : IPv6 Port : not specified IP address : 256.0.0.0 Address : 0 Address Space : Invalid Port : 0 IP address : ::ffff:127.0.0.0.1 Address : 0 Address Space : Invalid Port : 0
Nim
import net, sequtils, strscans, strutils
const NoPort = -1
func parseIpAddressAndPort(str: string): tuple[ipAddr: IpAddress; port: int] =
var ipString: string
var port: int
if str.scanf("[$+]:$i", ipString, port):
# IP v6 address with port.
return (ipString.parseIpAddress(), port)
if '.' in str and str.scanf("$+:$i", ipString, port):
# IP v4 address with port.
return (ipString.parseIpAddress(), port)
# IP address without port.
result = (str.parseIpAddress(), NoPort)
const Inputs = ["127.0.0.1", "127.0.0.1:80",
"::1", "[::1]:80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80"]
# Room to reserve to display the input.
const InputSize = Inputs.mapIt(it.len).foldl(max(a, b)) + 2
echo "Input".alignLeft(InputSize), "Address".align(32), " Space", " Port"
for input in Inputs:
try:
let (ipAddress, port) = input.parseIpAddressAndPort()
let portStr = if port == NoPort: "" else: $port
case ipAddress.family
of IPv6:
echo input.alignLeft(InputSize),
ipAddress.address_v6.map(toHex).join().align(32),
"IP v6".align(7),
portStr.align(6)
of IPv4:
echo input.alignLeft(InputSize),
ipAddress.address_v4.map(toHex).join().align(32),
"IP v4".align(7),
portStr.align(6)
except ValueError:
echo "Invalid IP address: ", input
- Output:
Input Address Space Port 127.0.0.1 7F000001 IP v4 127.0.0.1:80 7F000001 IP v4 80 ::1 00000000000000000000000000000001 IP v6 [::1]:80 00000000000000000000000000000001 IP v6 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 IP v6 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393E3 IP v6 80
Perl
sub parse_v4 {
my ($ip, $port) = @_;
my @quad = split(/\./, $ip);
return unless @quad == 4;
for (@quad) { return if ($_ > 255) }
if (!length $port) { $port = -1 }
elsif ($port =~ /^(\d+)$/) { $port = $1 }
else { return }
my $h = join '' => map(sprintf("%02x", $_), @quad);
return $h, $port
}
sub parse_v6 {
my $ip = shift;
my $omits;
return unless $ip =~ /^[\da-f:.]+$/i; # invalid char
$ip =~ s/^:/0:/;
$omits = 1 if $ip =~ s/::/:z:/g;
return if $ip =~ /z.*z/; # multiple omits illegal
my $v4 = '';
my $len = 8;
if ($ip =~ s/:((?:\d+\.){3}\d+)$//) {
# hybrid 4/6 ip
($v4) = parse_v4($1) or return;
$len -= 2;
}
# what's left should be v6 only
return unless $ip =~ /^[:a-fz\d]+$/i;
my @h = split(/:/, $ip);
return if @h + $omits > $len; # too many segments
@h = map( $_ eq 'z' ? (0) x ($len - @h + 1) : ($_), @h);
return join('' => map(sprintf("%04x", hex($_)), @h)).$v4;
}
sub parse_ip {
my $str = shift;
$str =~ s/^\s*//;
$str =~ s/\s*$//;
if ($str =~ s/^((?:\d+\.)+\d+)(?::(\d+))?$//) {
return 'v4', parse_v4($1, $2);
}
my ($ip, $port);
if ($str =~ /^\[(.*?)\]:(\d+)$/) {
$port = $2;
$ip = parse_v6($1);
} else {
$port = -1;
$ip = parse_v6($str);
}
return unless $ip;
return 'v6', $ip, $port;
}
for (qw/127.0.0.1 127.0.0.1:80
::1
[::1]:80
2605:2700:0:3::4713:93e3
[2605:2700:0:3::4713:93e3]:80
::ffff:192.168.0.1
[::ffff:192.168.0.1]:22
::ffff:127.0.0.0.1
a::b::1/)
{
print "$_\n\t";
my ($ver, $ip, $port) = parse_ip($_)
or print "parse error\n" and next;
print "$ver $ip\tport $port\n\n";
}
output
127.0.0.1
v4 7f000001 port -1
127.0.0.1:80
v4 7f000001 port 80
::1
v6 00000000000000000000000000000001 port -1
[::1]:80
v6 00000000000000000000000000000001 port 80
2605:2700:0:3::4713:93e3
v6 260527000000000300000000471393e3 port -1
[2605:2700:0:3::4713:93e3]:80
v6 260527000000000300000000471393e3 port 80
::ffff:192.168.0.1
v6 00000000000000000000ffffc0a80001 port -1
[::ffff:192.168.0.1]:22
v6 00000000000000000000ffffc0a80001 port 22
::ffff:127.0.0.0.1
parse error
a::b::1
parse error
Phix
with javascript_semantics function parse_ip(string txt) sequence r integer dot = find('.',txt), colon = find(':',txt), openbr = find('[',txt), closebr = find(']',txt) if (colon=5 and txt[1..4] = "http") or (colon=6 and txt[1..5] = "https") then txt = trim(txt[colon+1..$],"/") return parse_ip(txt) end if bool ipv6 = openbr or dot=0 or (colon and colon<dot) if ipv6 then sequence res = repeat(0,8) if openbr then if openbr!=1 or closebr<openbr then return 0 end if r = scanf(txt[closebr+1..$],":%d") if length(r)!=1 then return 0 end if atom port = r[1][1] if port<0 or port>65535 then return 0 end if res &= port txt = txt[2..closebr-1] end if if dot then colon = rfind(':',txt) if colon>dot then return 0 end if object r4 = parse_ip(txt[colon+1..$]) if not sequence(r4) or length(r4)!=4 then return 0 end if res[7] = r4[1]*#100+r4[2] res[8] = r4[3]*#100+r4[4] txt = txt[1..colon-1+(txt[colon-1]=':')] dot = 2 end if sequence r8 = {} integer ip = 0 while length(txt) do colon = find(':',txt) if colon=1 then if ip then return 0 end if ip = length(r8)+1 txt = txt[2+(length(r8)=0)..$] else r = scanf(txt[1..colon-1],"%x") if length(r)!=1 then return 0 end if atom r11 = r[1][1] if r11<0 or r11>#FFFF then return 0 end if r8 &= r11 if colon=0 then exit end if txt = txt[colon+1..$] end if end while if ip then if length(r8)>=(8-dot) then return 0 end if r8[ip..ip-1] = repeat(0,(8-dot)-length(r8)) else if length(r8)!=8-dot then return 0 end if end if res[1..8-dot] = r8 return res end if -- ipv4: if dot=0 or (colon and colon<dot) then return 0 end if string d4 = substitute(txt[1..colon-1],'.',' ') r = scanf(d4,"%d %d %d %d") if length(r)!=1 then return 0 end if r = r[1] for i=1 to length(r) do if r[i]<0 or r[i]>255 then return 0 end if end for if colon then sequence r2 = scanf(txt[colon+1..$],"%d") if length(r2)!=1 then return 0 end if atom port = r2[1][1] if port<0 or port>65535 then return 0 end if r &= port end if return r end function constant tests = {{"127.0.0.1",{127,0,0,1}}, {"127.0.0.1:80",{127,0,0,1,80}}, {"::1",{0,0,0,0,0,0,0,1}}, {"[::1]:80",{0,0,0,0,0,0,0,1,80}}, {"2605:2700:0:3::4713:93e3",{#2605,#2700,0,3,0,0,#4713,#93e3}}, {"[2605:2700:0:3::4713:93e3]:80",{#2605,#2700,0,3,0,0,#4713,#93e3,80}}, {"::ffff:192.168.173.22",{0,0,0,0,0,#ffff,#c0a8,#ad16}}, {"[::ffff:192.168.173.22]:80",{0,0,0,0,0,#ffff,#c0a8,#ad16,80}}, {"1::",{1,0,0,0,0,0,0,0}}, {"[1::]:80",{1,0,0,0,0,0,0,0,80}}, {"::",{0,0,0,0,0,0,0,0}}, {"[::]:80",{0,0,0,0,0,0,0,0,80}}, {"192.168.0.1",{192,168,0,1}}, {"2001:db8:85a3:0:0:8a2e:370:7334",{#2001,#db8,#85a3,0,0,#8a2e,#370,#7334}}, {"2001:db8:85a3::8a2e:370:7334",{#2001,#db8,#85a3,0,0,#8a2e,#370,#7334}}, {"[2001:db8:85a3:8d3:1319:8a2e:370:7334]:443",{#2001,#db8,#85a3,#8d3,#1319,#8a2e,#370,#7334,443}}, {"256.0.0.0",0}, {"g::1",0}, {"::ffff:127.0.0.0.1",0}, {"a::b::1",0}, {"0000",0}, {"0000:0000",0}, {"0000:0000:0000:0000:0000:0000:0000:0000",{0,0,0,0,0,0,0,0}}, {"0000:0000:0000::0000:0000",{0,0,0,0,0,0,0,0}}, {"0000::0000::0000:0000",0}, {"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",{#ffff,#ffff,#ffff,#ffff,#ffff,#ffff,#ffff,#ffff}}, {"ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff",0}, {"fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",{#fff,#ffff,#ffff,#ffff,#ffff,#ffff,#ffff,#ffff}}, {"fff:ffff:0:ffff:ffff:ffff:ffff:ffff",{#fff,#ffff,0,#ffff,#ffff,#ffff,#ffff,#ffff}}, {"2001:0db8:0:0:0:0:1428:57ab",{#2001,#0db8,0,0,0,0,#1428,#57ab}}, {"2001:0db8::1428:57ab",{#2001,#0db8,0,0,0,0,#1428,#57ab}}, {"2001:0db8:0:0:8d3:0:0:0",{#2001,#0db8,0,0,#8d3,0,0,0}}, {"2001:0db8:0:0:8d3::",{#2001,#0db8,0,0,#8d3,0,0,0}}, {"2001:0db8::8d3:0:0:0",{#2001,#0db8,0,0,#8d3,0,0,0}}, {"http://127.0.0.1/",{127,0,0,1}}, {"https://127.0.0.1/",{127,0,0,1}}, {"http:",0}, {"http:/2001:db8:3:4::127.0.2.0",{#2001,#db8,3,4,0,0,#7F00,#200}}, {"::192.168.0.1",{0,0,0,0,0,0,#C0A8,1}}, {"::ffff:0:255.255.255.255",{0,0,0,0,#ffff,0,#ffff,#ffff}}, {"",0}, {"ffffffffffffffffffffffffffffffff::",0}, {"[1::]:9999999999999999999999999999",0}, {"I think that's enough tests for now",0}} for i=1 to length(tests) do {string ip, object expected} = tests[i] object actual = parse_ip(ip) if actual!=expected then ?{ip,actual,expected} ?9/0 end if string addr if actual=0 then addr = "**not a valid ip address**" else if remainder(length(actual),2) then actual[$] = sprintf(", port %d",actual[$]) else actual = append(actual,"") end if if length(actual)=5 then addr = sprintf("ivp4 address: %02x%02x%02x%02x%s",actual) elsif length(actual)=9 then addr = sprintf("ivp6 address: %04x%04x%04x%04x%04x%04x%04x%04x%s",actual) else ?9/0 end if end if printf(1,"%45s %s\n",{ip,addr}) end for
- Output:
127.0.0.1 ivp4 address: 7F000001 127.0.0.1:80 ivp4 address: 7F000001, port 80 ::1 ivp6 address: 00000000000000000000000000000001 [::1]:80 ivp6 address: 00000000000000000000000000000001, port 80 2605:2700:0:3::4713:93e3 ivp6 address: 260527000000000300000000471393E3 [2605:2700:0:3::4713:93e3]:80 ivp6 address: 260527000000000300000000471393E3, port 80 ::ffff:192.168.173.22 ivp6 address: 00000000000000000000FFFFC0A8AD16 [::ffff:192.168.173.22]:80 ivp6 address: 00000000000000000000FFFFC0A8AD16, port 80 1:: ivp6 address: 00010000000000000000000000000000 [1::]:80 ivp6 address: 00010000000000000000000000000000, port 80 :: ivp6 address: 00000000000000000000000000000000 [::]:80 ivp6 address: 00000000000000000000000000000000, port 80 192.168.0.1 ivp4 address: C0A80001 2001:db8:85a3:0:0:8a2e:370:7334 ivp6 address: 20010DB885A3000000008A2E03707334 2001:db8:85a3::8a2e:370:7334 ivp6 address: 20010DB885A3000000008A2E03707334 [2001:db8:85a3:8d3:1319:8a2e:370:7334]:443 ivp6 address: 20010DB885A308D313198A2E03707334, port 443 256.0.0.0 **not a valid ip address** g::1 **not a valid ip address** ::ffff:127.0.0.0.1 **not a valid ip address** a::b::1 **not a valid ip address** 0000 **not a valid ip address** 0000:0000 **not a valid ip address** 0000:0000:0000:0000:0000:0000:0000:0000 ivp6 address: 00000000000000000000000000000000 0000:0000:0000::0000:0000 ivp6 address: 00000000000000000000000000000000 0000::0000::0000:0000 **not a valid ip address** ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff ivp6 address: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff **not a valid ip address** fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff ivp6 address: 0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF fff:ffff:0:ffff:ffff:ffff:ffff:ffff ivp6 address: 0FFFFFFF0000FFFFFFFFFFFFFFFFFFFF 2001:0db8:0:0:0:0:1428:57ab ivp6 address: 20010DB80000000000000000142857AB 2001:0db8::1428:57ab ivp6 address: 20010DB80000000000000000142857AB 2001:0db8:0:0:8d3:0:0:0 ivp6 address: 20010DB80000000008D3000000000000 2001:0db8:0:0:8d3:: ivp6 address: 20010DB80000000008D3000000000000 2001:0db8::8d3:0:0:0 ivp6 address: 20010DB80000000008D3000000000000 http://127.0.0.1/ ivp4 address: 7F000001 https://127.0.0.1/ ivp4 address: 7F000001 http: **not a valid ip address** http:/2001:db8:3:4::127.0.2.0 ivp6 address: 20010DB800030004000000007F000200 ::192.168.0.1 ivp6 address: 000000000000000000000000C0A80001 ::ffff:0:255.255.255.255 ivp6 address: 0000000000000000FFFF0000FFFFFFFF **not a valid ip address** ffffffffffffffffffffffffffffffff:: **not a valid ip address** [1::]:9999999999999999999999999999 **not a valid ip address** I think that's enough tests for now **not a valid ip address**
PicoLisp
# Return a cons pair of address and port: (address . port)
(de ipAddress (Adr)
(use (@A @B @C @D @Port)
(cond
((match '("[" @A "]" ":" @Port) Adr)
(adrIPv6 (split @A ":") @Port) )
((match '("[" @A "]") Adr)
(adrIPv6 (split @A ":")) )
((match '(@A ":" @B ":" @C) Adr)
(adrIPv6 (cons @A @B (split @C ":"))) )
((match '(@A "." @B "." @C "." @D ":" @Port) Adr)
(adrIPv4 (list @A @B @C @D) @Port) )
((match '(@A "." @B "." @C "." @D) Adr)
(adrIPv4 (list @A @B @C @D)) )
(T (quit "Bad IP address" (pack Adr))) ) ) )
(de adrIPv4 (Lst Port)
(cons
(sum >> (-24 -16 -8 0) (mapcar format Lst))
(format Port) ) )
(de adrIPv6 (Lst Port)
(cons
(sum >>
(-112 -96 -80 -64 -48 -32 -16 0)
(mapcan
'((X)
(if X
(cons (hex X))
(need (- 9 (length Lst)) 0) ) ) # Handle '::'
(cons (or (car Lst) "0") (cdr Lst)) ) )
(format Port) ) )Test:
(for A
(quote
"127.0.0.1"
"127.0.0.1:80"
"::1"
"[::1]:80"
"2605:2700:0:3::4713:93e3"
"[2605:2700:0:3::4713:93e3]:80" )
(let I (ipAddress (chop A))
(tab (-29 34 40 7)
A
(hex (car I))
(format (car I))
(cdr I) ) ) )Output:
127.0.0.1 7F000001 2130706433 127.0.0.1:80 7F000001 2130706433 80 ::1 1 1 [::1]:80 1 1 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 50537416338094019778974086937420469219 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393E3 50537416338094019778974086937420469219 80
PL/I
*process or(!) source xref attributes macro options;
/*********************************************************************
* Program to parse an IP address into --> IPv4 or IPv6 format
* 28.05.2013 Walter Pachl translated from REXX version 3
* x2d was the hard part :-)
*********************************************************************/
ip: proc options(main);
Dcl ipa char(50) Var;
Dcl ipi char(50) Var;
Dcl ipax char(50) Var Init('');
Dcl ipad char(50) Var Init('');
Dcl space char(4);
Dcl port char(5) Var;
dcl head Char(132) Var;
head=' input IP address hex IP address '!!
' decimal IP address space port';
Put Edit(head)(Skip,a);
Put Edit(copies('_',30),
copies('_',32),
copies('_',39),
copies('_', 5),
copies('_', 5))
(Skip,6(a,x(1)));
call expand('127.0.0.1');
call expand('127.0.0.1:80');
call expand('2605:2700:0:3::4713:93e3');
call expand('[2605:2700:0:3::4713:93e3]:80');
call expand('::1');
call expand('[::1]:80');
expand: procedure(s);
Dcl s Char(50) Var;
ipi=s;
ipa=s;
If index(ipa,'.')>0 Then
Call expand_ipv4;
Else
Call expand_ipv6;
ipad=x2d(ipax);
Put Edit(left(ipi,30),right(ipax,32),right(ipad,39),
right(space,5),right(port,5))
(Skip,6(a,x(1)));
End;
expand_ipv4: Proc;
Dcl a(4) Char(3) Var;
Dcl (pp,j) Bin Fixed(31);
space='IPv4';
pp=index(ipa,':');
If pp>0 Then Do;
port=substr(ipa,pp+1);
ipa=left(ipa,pp-1);
End;
Else
Port='';
Call parse((ipa),'.',a);
ipax='';
do j=1 To 4;
ipax=ipax!!a(j);
end;
End;
expand_ipv6: Proc;
Dcl a(8) Char(4) Var;
Dcl (s,o1,o2) Char(50) Var Init('');
Dcl (i,ii,pp,j,n) Bin Fixed(31) Init(0);
space='IPv6';
pp=index(ipa,']:');
If pp>0 Then Do;
port=substr(ipa,pp+2);
ipa=substr(ipa,2,pp-2);
End;
Else
Port='';
s=ipa;
j=0;
Do i=1 To 8 While(s>'');
pp=index(s,':');
dcl temp Char(6) Var;
If pp>1 Then
temp=left(s,pp-1);
Else
temp=s;
temp=right(temp,4,'0');
Select(pp);
When(0) Do;
a(i)=temp;
s='';
End;
When(1) Do;
a(i)='----';
ii=i;
s=substr(s,pp+1);
If left(s,1)=':' Then
s=substr(s,2);
End;
Otherwise Do;
a(i)=temp;
s=substr(s,pp+1);
End;
End;
End;
n=i-1;
o1='';
o2='';
Do i=1 To n;
If i=ii Then Do;
o1=o1!!'----';
Do j=1 To 9-n;
o2=o2!!'0000';
End;
End;
Else Do;
o1=o1!!right(a(i),4,'0');
o2=o2!!right(a(i),4,'0');
End;
End;
ipax=o2;
End;
parse: Proc(s,c,a);
Dcl s Char(50) Var;
Dcl c Char( 1);
Dcl a(*) Char(*) Var;
Dcl (i,p) Bin Fixed(31);
a='';
Do i=1 By 1 While(length(s)>0);
p=index(s,c);
If p>0 Then Do;
a(i)=left(s,p-1);
s=substr(s,p+1);
End;
Else Do;
a(i)=s;
s='';
End;
End;
End;
/*
underscore: Proc(s) Returns(char(132) Var);
Dcl s Char(*);
Dcl r Char(length(s)) Var Init('');
Dcl i Bin Fixed(31);
Dcl us Bit(1) Init('0'b);
Do i=1 To length(s)-1;
If substr(s,i,1)>' ' Then Do;
r=r!!'_';
us='1'b;
End;
Else Do;
If substr(s,i+1,1)>' ' & us Then
r=r!!'_';
Else Do;
r=r!!' ';
us='0'b;
End;
End;
End;
If substr(s,length(s),1)>' ' Then
r=r!!'_';
Return(r);
End;
center: Proc(s,l) Returns(char(50) Var);
Dcl s char(50) Var;
Dcl (l,b) Bin Fixed(31);
b=(l-length(s))/2;
Return(left(copies(' ',b)!!s,l));
End;
*/
copies: Proc(c,n) Returns(char(50) Var);
Dcl c char(50) Var;
Dcl n Bin Fixed(31);
Return(repeat(c,n-1));
End;
c2d: Procedure(s) Returns(Char(50) Var);
Dcl s Char(*) Var;
Dcl d Pic'99';
Dcl (v,part,result,old) Char(100) Var;
Dcl i Bin Fixed(31);
result='0';
v='1';
Do i=length(s) To 1 By -1;
d=c2d(substr(s,i,1));
part=longmult((v),(d));
result=longadd((result),(part));
v=longmult((v),'16');
End;
Do While(left(result,1)='0');
result=substr(result,2);
End;
Return(result);
/*
dbg: Proc(txt);
Dcl txt Char(*);
Put Skip list(txt);
End;
*/
x2d: Procedure(c) Returns(Char(2));
Dcl c Char(1);
Dcl res Char(2);
Select(c);
When('a','A') res='10';
When('b','B') res='11';
When('c','C') res='12';
When('d','D') res='13';
When('e','E') res='14';
When('f','F') res='15';
Otherwise res='0'!!c;
End;
Return(res);
End;
longmult: Procedure(as,bs) Returns(Char(1000) Var);
/* REXX **************************************************************
* Multiply(as,bs) -> as*bs
*********************************************************************/
Dcl (as,bs) Char(*);
Dcl (a(1000),b(1000),r(1000)) Pic'9';
Dcl (p,s) Pic'99';
Dcl (al,bl) Bin Fixed(31);
Dcl (i,ai,bi,ri,rim) Bin Fixed(31);
Dcl res Char(1000) Var Init((1000)'0');
al=length(as); Do ai=al To 1 By -1; a(ai)=substr(as,al-ai+1,1); End;
bl=length(bs); Do bi=bl To 1 By -1; b(bi)=substr(bs,bl-bi+1,1); End;
r=0;
rim=0;
Do bi=1 To bl;
Do ai=1 To al;
ri=ai+bi-1;
p=a(ai)*b(bi);
Do i=ri by 1 Until(p=0);
s=r(i)+p;
r(i)=mod(s,10);
p=s/10;
End;
rim=max(rim,i);
End;
End;
res='';
Do i=1 To rim;
res=r(i)!!res;
End;
Return(res);
End;
longadd: proc(as,bs) Returns(Char(100) Var);
Dcl (as,bs) Char(*) Var;
Dcl cs Char(100) Var Init('');
Dcl (al,bl,cl,i) Bin Fixed(31);
Dcl a(100) Pic'9' Init((100)0);
Dcl b(100) Pic'9' Init((100)0);
Dcl c(100) Pic'9' Init((100)0);
Dcl temp Pic'99';
al=length(as);
bl=length(bs);
Do i=1 To al; a(i)=substr(as,al-i+1,1); End;
Do i=1 To bl; b(i)=substr(bs,bl-i+1,1); End;
cl=max(al,bl)+1;
Do i=1 To cl;
temp=a(i)+b(i)+c(i);
c(i)=mod(temp,10);
c(i+1)=c(i+1)+temp/10;
End;
Do i=1 To cl;
cs=c(i)!!cs;
End;
Return(cs);
End;
End;
end;Output:
input IP address hex IP address decimal IP address space port
______________________________ ________________________________ _______________________________________ _____ _____
127.0.0.1 127001 1208321 IPv4
127.0.0.1:80 127001 1208321 IPv4 80
2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6
[2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6 80
::1 00000000000000000000000000000001 1 IPv6
[::1]:80 00000000000000000000000000000001 1 IPv6 80
PowerShell
function Get-IpAddress
{
[CmdletBinding()]
[OutputType([PSCustomObject])]
Param
(
[Parameter(Mandatory=$true,
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
Position=0)]
$InputObject
)
Begin
{
function Get-Address ([string]$Address)
{
if ($Address.IndexOf(".") -ne -1)
{
$Address, $port = $Address.Split(":")
[PSCustomObject]@{
IPAddress = [System.Net.IPAddress]$Address
Port = $port
}
}
else
{
if ($Address.IndexOf("[") -ne -1)
{
[PSCustomObject]@{
IPAddress = [System.Net.IPAddress]$Address
Port = ($Address.Split("]")[-1]).TrimStart(":")
}
}
else
{
[PSCustomObject]@{
IPAddress = [System.Net.IPAddress]$Address
Port = $null
}
}
}
}
}
Process
{
$InputObject | ForEach-Object {
$address = Get-Address $_
$bytes = ([System.Net.IPAddress]$address.IPAddress).GetAddressBytes()
[Array]::Reverse($bytes)
$i = 0
$bytes | ForEach-Object -Begin {[bigint]$decimalIP = 0} `
-Process {$decimalIP += [bigint]$_ * [bigint]::Pow(256, $i); $i++} `
-End {[PSCustomObject]@{
Address = $address.IPAddress
Port = $address.Port
Hex = "0x$($decimalIP.ToString('x'))"}
}
}
}
}
Parse an array of IP addresses in a text format:
$ipAddresses = "127.0.0.1","127.0.0.1:80","::1","[::1]:80","2605:2700:0:3::4713:93e3","[2605:2700:0:3::4713:93e3]:80" | Get-IpAddress
$ipAddresses
- Output:
Address Port Hex ------- ---- --- 127.0.0.1 0x7f000001 127.0.0.1 80 0x7f000001 ::1 0x1 ::1 80 0x1 2605:2700:0:3::4713:93e3 0x260527000000000300000000471393e3 2605:2700:0:3::4713:93e3 80 0x260527000000000300000000471393e3
The Address "property" is an object containing more information...
$ipAddresses[5].Address
- Output:
Address : AddressFamily : InterNetworkV6 ScopeId : 0 IsIPv6Multicast : False IsIPv6LinkLocal : False IsIPv6SiteLocal : False IsIPv6Teredo : False IsIPv4MappedToIPv6 : False IPAddressToString : 2605:2700:0:3::4713:93e3
... allowing for specific filtering:
$ipAddresses | where {$_.Address.AddressFamily -eq "InterNetworkV6" -and $_.Port -ne $null}
- Output:
Address Port Hex ------- ---- --- ::1 80 0x1 2605:2700:0:3::4713:93e3 80 0x260527000000000300000000471393e3
Python
Python: Using ipaddress
from ipaddress import ip_address
from urllib.parse import urlparse
tests = [
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:80",
"::192.168.0.1",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80" ]
def parse_ip_port(netloc):
try:
ip = ip_address(netloc)
port = None
except ValueError:
parsed = urlparse('//{}'.format(netloc))
ip = ip_address(parsed.hostname)
port = parsed.port
return ip, port
for address in tests:
ip, port = parse_ip_port(address)
hex_ip = {4:'{:08X}', 6:'{:032X}'}[ip.version].format(int(ip))
print("{:39s} {:>32s} IPv{} port={}".format(
str(ip), hex_ip, ip.version, port ))
- Output:
127.0.0.1 7F000001 IPv4 port=None 127.0.0.1 7F000001 IPv4 port=80 ::1 00000000000000000000000000000001 IPv6 port=None ::1 00000000000000000000000000000001 IPv6 port=80 ::c0a8:1 000000000000000000000000C0A80001 IPv6 port=None 2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 IPv6 port=None 2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 IPv6 port=80
Python: Using pyparsing
The following uses pyparse to parse the IP address. It's an attempt at using pyparse to describe an IP address in an extended BNF syntax. Using a parser does seems a bit like using a sledgehammer to crack a nut. However it does make for an interesting alternative to using a regular expressions to parse IP addresses. Note - for example - that the parser specifically reports - as an exception - the location where the IP address is syntactically wrong.
import string
from pyparsing import * # import antigravity
tests="""#
127.0.0.1 # The "localhost" IPv4 address
127.0.0.1:80 # The "localhost" IPv4 address, with a specified port (80)
::1 # The "localhost" IPv6 address
[::1]:80 # The "localhost" IPv6 address, with a specified port (80)
2605:2700:0:3::4713:93e3 # Rosetta Code's primary server's public IPv6 address
[2605:2700:0:3::4713:93e3]:80 # Rosetta Code's primary server's public IPv6 address, +port (80)
2001:db8:85a3:0:0:8a2e:370:7334 # doc, IPv6 for 555-1234
2001:db8:85a3::8a2e:370:7334 # doc
[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443 # doc +port
192.168.0.1 # private
::ffff:192.168.0.1 # private transitional
::ffff:71.19.147.227 # Rosetta Code's transitional
[::ffff:71.19.147.227]:80 # Rosetta Code's transitional +port
:: # unspecified
256.0.0.0 # invalid, octet > 255 (currently not detected)
g::1 # invalid
0000 Bad address
0000:0000 Bad address
0000:0000:0000:0000:0000:0000:0000:0000 Good address
0000:0000:0000::0000:0000 Good Address
0000::0000::0000:0000 Bad address
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff Good address
ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff Bad address
fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff Good address
fff:ffff:0:ffff:ffff:ffff:ffff:ffff Good address
"""
def print_args(args):
print "print_args:", args
def join(args):
args[0]="".join(args)
del args[1:]
def replace(val):
def lambda_replace(args):
args[0]=val
del args[1:]
return lambda_replace
def atoi(args): args[0]=string.atoi(args[0])
def itohex2(args): args[0]="%02x"%args[0]
def hextoi(args): args[0]=string.atoi(args[0], 16)
def itohex4(args): args[0]="%04x"%args[0]
def assert_in_range(lwb, upb):
def range_check(args):
return # turn range checking off
if args[0] < lwb:
raise ValueError,"value %d < %d"%(args[0], lwb)
if args[0] > upb:
raise ValueError,"value %d > %d"%(args[0], upb)
return range_check
dot = Literal(".").suppress()("dot"); colon = Literal(":").suppress()("colon")
octet = Word(nums).setParseAction(atoi,assert_in_range(0,255),itohex2)("octet");
port = Word(nums).setParseAction(atoi,assert_in_range(0,256*256-1))("port")
ipv4 = (octet + (dot+octet)*3)("addr")
ipv4.setParseAction(join) #,hextoi)
ipv4_port = ipv4+colon.suppress()+port
a2f = "abcdef"
hex = oneOf(" ".join(nums+a2f));
hexet = (hex*(0,4))("hexet")
hexet.setParseAction(join, hextoi, itohex4)
max=8; stop=max+1
xXXXX_etc = [None, hexet]; xXXXX_etc.extend([hexet + (colon+hexet)*n for n in range(1,max)])
x0000_etc = [ Literal("::").setParseAction(replace("0000"*num_x0000s)) for num_x0000s in range(stop) ]
ipv6=xXXXX_etc[-1]+x0000_etc[0] | xXXXX_etc[-1]
# Build a table of rules for IPv6, in particular the double colon
for num_prefix in range(max-1, -1, -1):
for num_x0000s in range(0,stop-num_prefix):
x0000 = x0000_etc[num_x0000s]
num_suffix=max-num_prefix-num_x0000s
if num_prefix:
if num_suffix: pat = xXXXX_etc[num_prefix]+x0000+xXXXX_etc[num_suffix]
else: pat = xXXXX_etc[num_prefix]+x0000
elif num_suffix: pat = x0000+xXXXX_etc[num_suffix]
else: pat=x0000
ipv6 = ipv6 | pat
ipv6.setParseAction(join) # ,hextoi)
ipv6_port = Literal("[").suppress() + ipv6 + Literal("]").suppress()+colon+port
ipv6_transitional = (Literal("::ffff:").setParseAction(replace("0"*20+"ffff"))+ipv4).setParseAction(join)
ipv6_transitional_port = Literal("[").suppress() + ipv6_transitional + Literal("]").suppress()+colon+port
ip_fmt = (
(ipv4_port|ipv4)("ipv4") |
(ipv6_transitional_port|ipv6_transitional|ipv6_port|ipv6)("ipv6")
) + LineEnd()
class IPAddr(object):
def __init__(self, string):
self.service = dict(zip(("address","port"), ip_fmt.parseString(string)[:]))
def __getitem__(self, key): return self.service[key]
def __contains__(self, key): return key in self.service
def __repr__(self): return `self.service` # "".join(self.service)
address=property(lambda self: self.service["address"])
port=property(lambda self: self.service["port"])
is_service=property(lambda self: "port" in self.service)
version=property(lambda self: {False:4, True:6}[len(self.address)>8])
for test in tests.splitlines():
if not test.startswith("#"):
ip_str, desc = test.split(None,1)
print ip_str,"=>",
try:
ip=IPAddr(ip_str)
print ip, "IP Version:",ip.version,"- Address is OK!",
except (ParseException,ValueError), details: print "Bad! IP address syntax error detected:",details,
print "- Actually:",desc
Output:
127.0.0.1 => {'address': '7f000001'} IP Version: 4 - Address is OK! - Actually: # The "localhost" IPv4 address
127.0.0.1:80 => {'port': 80, 'address': '7f000001'} IP Version: 4 - Address is OK! - Actually: # The "localhost" IPv4 address, with a specifie
d port (80)
::1 => {'address': '00000000000000000000000000000001'} IP Version: 6 - Address is OK! - Actually: # The "localhost" IPv6 address
[::1]:80 => {'port': 80, 'address': '00000000000000000000000000000001'} IP Version: 6 - Address is OK! - Actually: # The "localhost" IPv6 addr
ess, with a specified port (80)
2605:2700:0:3::4713:93e3 => {'address': '260527000000000300000000471393e3'} IP Version: 6 - Address is OK! - Actually: # Rosetta Code's primar
y server's public IPv6 address
[2605:2700:0:3::4713:93e3]:80 => {'port': 80, 'address': '260527000000000300000000471393e3'} IP Version: 6 - Address is OK! - Actually: # Rose
tta Code's primary server's public IPv6 address, +port (80)
2001:db8:85a3:0:0:8a2e:370:7334 => {'address': '20010db885a3000000008a2e03707334'} IP Version: 6 - Address is OK! - Actually: # doc, IPv6 for
555-1234
2001:db8:85a3::8a2e:370:7334 => {'address': '20010db885a3000000008a2e03707334'} IP Version: 6 - Address is OK! - Actually: # doc
[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443 => {'port': 443, 'address': '20010db885a308d313198a2e03707348'} IP Version: 6 - Address is OK! - Ac
tually: # doc +port
192.168.0.1 => {'address': 'c0a80001'} IP Version: 4 - Address is OK! - Actually: # private
::ffff:192.168.0.1 => {'address': '00000000000000000000ffffc0a80001'} IP Version: 6 - Address is OK! - Actually: # private transitional
::ffff:71.19.147.227 => {'address': '00000000000000000000ffff471393e3'} IP Version: 6 - Address is OK! - Actually: # Rosetta Code's transition
al
[::ffff:71.19.147.227]:80 => {'port': 80, 'address': '00000000000000000000ffff471393e3'} IP Version: 6 - Address is OK! - Actually: # Rosetta
Code's transitional +port
:: => {'address': '00000000000000000000000000000000'} IP Version: 6 - Address is OK! - Actually: # unspecified
256.0.0.0 => {'address': '100000000'} IP Version: 6 - Address is OK! - Actually: # invalid, octet > 255 (currently not detected)
g::1 => Bad! IP address syntax error detected: (at char 4), (line:1, col:5) - Actually: # invalid
0000 => Bad! IP address syntax error detected: Expected "." (at char 4), (line:1, col:5) - Actually: Bad address
0000:0000 => Bad! IP address syntax error detected: Expected ":" (at char 9), (line:1, col:10) - Actually: Bad address
0000:0000:0000:0000:0000:0000:0000:0000 => {'address': '00000000000000000000000000000000'} IP Version: 6 - Address is OK! - Actually: Good add
ress
0000:0000:0000::0000:0000 => {'address': '00000000000000000000000000000000'} IP Version: 6 - Address is OK! - Actually: Good Address
0000::0000::0000:0000 => Bad! IP address syntax error detected: Expected end of line (at char 10), (line:1, col:11) - Actually: Bad address
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff => {'address': 'ffffffffffffffffffffffffffffffff'} IP Version: 6 - Address is OK! - Actually: Good add
ress
ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff => Bad! IP address syntax error detected: Expected ":" (at char 18), (line:1, col:19) - Actually: Bad
address
fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff => {'address': '0fffffffffffffffffffffffffffffff'} IP Version: 6 - Address is OK! - Actually: Good addr
ess
fff:ffff:0:ffff:ffff:ffff:ffff:ffff => {'address': '0fffffff0000ffffffffffffffffffff'} IP Version: 6 - Address is OK! - Actually: Good address
Racket
#lang racket
(require net/private/ip)
(define (bytes->hex bs)
(string-append* (map (λ(n) (~r n #:base 16 #:min-width 2 #:pad-string "0"))
(bytes->list bs))))
(define (parse-ip str)
(define-values [ipstr portstr]
(match str
[(regexp #rx"^([0-9.]+):([0-9]+)$" (list _ i p)) (values i p)]
[(regexp #rx"^\\[([0-9a-fA-F:]+)\\]:([0-9]+)$" (list _ i p)) (values i p)]
[_ (values str "")]))
(define ip (make-ip-address ipstr))
(define 4? (ipv4? ip))
(define hex (bytes->hex ((if 4? ipv4-bytes ipv6-bytes) ip)))
(displayln (~a (~a str #:min-width 30)
" "
(~a hex #:min-width 32 #:align 'right)
" ipv" (if 4? "4" "6") " " portstr)))
(for-each parse-ip
'("127.0.0.1"
"127.0.0.1:80"
"::1"
"[::1]:80"
"2605:2700:0:3::4713:93e3"
"[2605:2700:0:3::4713:93e3]:80"))
- Output:
127.0.0.1 7f000001 ipv4 127.0.0.1:80 7f000001 ipv4 80 ::1 00000000000000000000000000000001 ipv6 [::1]:80 00000000000000000000000000000001 ipv6 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 ipv6 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 ipv6 80
Raku
(formerly Perl 6)
grammar IP_Addr {
token TOP { ^ [ <IPv4> | <IPv6> ] $ }
token IPv4 {
[ <d8> +% '.' ] <?{ $<d8> == 4 }> <port>?
{ @*by8 = @$<d8> }
}
token IPv6 {
| <ipv6>
| '[' <ipv6> ']' <port>
}
token ipv6 {
| <h16> +% ':' <?{ $<h16> == 8 }>
{ @*by16 = @$<h16> }
| [ (<h16>) +% ':']? '::' [ (<h16>) +% ':' ]? <?{ @$0 + @$1 ≤ 8 }>
{ @*by16 = |@$0, |('0' xx 8 - (@$0 + @$1)), |@$1 }
| '::ffff:' <IPv4>
{ @*by16 = |('0' xx 5), 'ffff', |(by8to16 @*by8) }
}
token d8 { (\d+) <?{ $0 < 256 }> }
token d16 { (\d+) <?{ $0 < 65536 }> }
token h16 { (<xdigit>+) <?{ $0.chars ≤ 4 }> }
token port {
':' <d16> { $*port = +$<d16> }
}
}
sub by8to16 (@m) { gather for @m -> $a,$b { take ($a * 256 + $b).fmt("%04x") } }
my @cases = <
127.0.0.1
127.0.0.1:80
::1
[::1]:80
2605:2700:0:3::4713:93e3
[2605:2700:0:3::4713:93e3]:80
2001:db8:85a3:0:0:8a2e:370:7334
2001:db8:85a3::8a2e:370:7334
[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443
192.168.0.1
::ffff:192.168.0.1
::ffff:71.19.147.227
[::ffff:71.19.147.227]:80
::
256.0.0.0
g::1
0000
0000:0000
0000:0000:0000:0000:0000:0000:0000:0000
0000:0000:0000::0000:0000
0000::0000::0000:0000
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff
fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
fff:ffff:0:ffff:ffff:ffff:ffff:ffff
>;
for @cases -> $addr {
my @*by8;
my @*by16;
my $*port;
IP_Addr.parse($addr);
say $addr;
if @*by16 {
say " IPv6: ", @*by16.map({:16(~$_)})».fmt("%04x").join;
say " Port: ", $*port if $*port;
}
elsif @*by8 {
say " IPv4: ", @*by8».fmt("%02x").join;
say " Port: ", $*port if $*port;
}
else {
say " BOGUS!";
}
say '';
}
- Output:
127.0.0.1 IPv4: 7f000001 127.0.0.1:80 IPv4: 7f000001 Port: 80 ::1 IPv6: 00000000000000000000000000000001 [::1]:80 IPv6: 00000000000000000000000000000001 Port: 80 2605:2700:0:3::4713:93e3 IPv6: 260527000000000300000000471393e3 [2605:2700:0:3::4713:93e3]:80 IPv6: 260527000000000300000000471393e3 Port: 80 2001:db8:85a3:0:0:8a2e:370:7334 IPv6: 20010db885a3000000008a2e03707334 2001:db8:85a3::8a2e:370:7334 IPv6: 20010db885a3000000008a2e03707334 [2001:db8:85a3:8d3:1319:8a2e:370:7348]:443 IPv6: 20010db885a308d313198a2e03707348 Port: 443 192.168.0.1 IPv4: c0a80001 ::ffff:192.168.0.1 IPv6: 00000000000000000000ffffc0a80001 ::ffff:71.19.147.227 IPv6: 00000000000000000000ffff471393e3 [::ffff:71.19.147.227]:80 IPv6: 00000000000000000000ffff471393e3 Port: 80 :: IPv6: 00000000000000000000000000000000 256.0.0.0 BOGUS! g::1 BOGUS! 0000 BOGUS! 0000:0000 BOGUS! 0000:0000:0000:0000:0000:0000:0000:0000 IPv6: 00000000000000000000000000000000 0000:0000:0000::0000:0000 IPv6: 00000000000000000000000000000000 0000::0000::0000:0000 IPv6: 00000000000000000000000000000000 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff IPv6: ffffffffffffffffffffffffffffffff ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff BOGUS! fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff IPv6: 0fffffffffffffffffffffffffffffff fff:ffff:0:ffff:ffff:ffff:ffff:ffff IPv6: 0fffffff0000ffffffffffffffffffff
REXX
One of REXX's strongest features is its ability for parsing, it has the parse instruction for this purpose.
version 1
/*REXX program parses an IP address into ──► IPv4 or IPv6 format, optional pport.*/
_= "_"; say center('input IP address' , 30),
center('hex IP address' , 32),
center('decimal IP address' , 39) "space port"
say copies(_, 30) copies(_, 32) copies(_, 39) copies(_, 5) copies(_, 5)
call IP_parse 127.0.0.1 /*this simple IP doesn't need quotes.*/
call IP_parse '127.0.0.1:80'
call IP_parse '::1'
call IP_parse '[::1]:80'
call IP_parse '2605:2700:0:3::4713:93e3'
call IP_parse '[2605:2700:0:3::4713:93e3]:80'
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
IP_parse: procedure; parse arg a .; hx=; @.=; numeric digits 50
dot= pos(., a)\==0 /*see if there is a dot present in IP. */
if dot then do; parse var a @.1 '.' @.2 "." @.3 '.' @.4 ":" port
do j=1 for 4; hx= hx || d2x(@.j, 2)
end /*j*/
end
else do; parse var a pureA ']:' port
_= space( translate( pureA, , '[]'), 0) /*remove brackets.*/
parse var _ x '::' y
do L=1 until x=='' /*get left side. */
parse var x @.L ':' x
end /*L*/
y= reverse(y)
do r=8 by -1 /*get right side. */
parse var y z ':' y; if z=='' then leave
@.r= reverse(z)
end /*r*/
do k=1 for 8; hx=hx || right( word(@.k 0, 1), 4, 0)
end /*k*/
end
say left(a,30) right(hx,32) right(x2d(hx),39) ' IPv' || (6-2*dot) right(port,5)
return
- output when using the internal default input:
input IP address hex IP address decimal IP address space port ────────────────────────────── ──────────────────────────────── ─────────────────────────────────────── ───── ───── 127.0.0.1 7F000001 2130706433 IPv4 127.0.0.1:80 7F000001 2130706433 IPv4 80 ::1 00000000000000000000000000000001 1 IPv6 [::1]:80 00000000000000000000000000000001 1 IPv6 80 2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6 [2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6 80
version 2
/* REXX ***************************************************************
* 27.05.2013 Walter Pachl
**********************************************************************/
Numeric Digits 100
say center('input IP address' ,30),
center('hex IP address' ,32),
center('decimal IP address' ,39) 'space port'
say copies(_,30) copies(_,32) copies(_,39) copies(_,5) copies(_,5) /*hdr*/
call expand '127.0.0.1'
call expand '127.0.0.1:80'
call expand '::1'
call expand '[::1]:80'
call expand '2605:2700:0:3::4713:93e3'
call expand '[2605:2700:0:3::4713:93e3]:80'
Say ' '
Say 'The following 2 are the same'
Call expand '2001:0db8:0:0:0:0:1428:57ab'
Call expand '2001:db8::1428:57ab'
Say ' '
Say 'The following 3 are all the same'
Call expand '2001:0db8:0:0:8d3:0:0:0'
Call expand '2001:db8:0:0:8d3::'
Call expand '2001:db8::8d3:0:0:0'
Exit
expand: Procedure
Parse Arg s
If pos('.',s)>0 Then
Parse Value expand_ip4(s) With exp space port
Else
Parse Value expand_ip6(s) With exp space port
Say left(s,30) right(exp,32) right(x2d(exp),39) right(space,5) right(port,5)
Return
expand_ip4: Procedure
Parse Arg s
If pos(':',s)>0 Then
Parse Var s s ':' port
Else
port=''
Do i=1 To 4
Parse Var s a.i '.' s
End
res=''
Do i=1 To 4
res=res||d2x(a.i,2)
End
Return res 'IPv4' port
expand_ip6: Procedure
/**********************************************************************
* Note: Doublecolon ('::') requires the inclusion of as many 0000
* tokens as necessary to result in 8 tokens
**********************************************************************/
Parse Arg s
If pos(']:',s)>0 Then
Parse Var s '[' s ']:' port
Else
port=''
sc=s
ii=0
Do i=1 To 8 While s<>''
Parse Var s x.i ':' s
If left(s,1)=':' Then Do
ii=i
s=substr(s,2)
End
End
n=i-1
ol=''
o2=''
Do i=1 To n
ol=ol||right(x.i,4,'0')
o2=o2||right(x.i,4,'0')
If i=ii Then Do
ol=ol||'----'
Do j=1 To 8-n
o2=o2||'0000'
End
End
End
Return o2 'IPv6' port
Output:
input IP address hex IP address decimal IP address space port
______________________________ ________________________________ _______________________________________ _____ _____
127.0.0.1 7F000001 2130706433 IPv4
127.0.0.1:80 7F000001 2130706433 IPv4 80
::1 00000000000000000000000000000001 1 IPv6
[::1]:80 00000000000000000000000000000001 1 IPv6 80
2605:2700:0:3::4713:93e3 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6
[2605:2700:0:3::4713:93e3]:80 260527000000000300000000471393e3 50537416338094019778974086937420469219 IPv6 80
The following 2 are the same
2001:0db8:0:0:0:0:1428:57ab 20010db80000000000000000142857ab 42540766411282592856903984951992014763 IPv6
2001:db8::1428:57ab 20010db80000000000000000142857ab 42540766411282592856903984951992014763 IPv6
The following 3 are all the same
2001:0db8:0:0:8d3:0:0:0 20010db80000000008d3000000000000 42540766411282592857539836924043198464 IPv6
2001:db8:0:0:8d3:: 20010db80000000008d3000000000000 42540766411282592857539836924043198464 IPv6
2001:db8::8d3:0:0:0 20010db80000000008d3000000000000 42540766411282592857539836924043198464 IPv6
Ruby
require 'ipaddr'
TESTCASES = ["127.0.0.1", "127.0.0.1:80",
"::1", "[::1]:80",
"2605:2700:0:3::4713:93e3", "[2605:2700:0:3::4713:93e3]:80"]
output = [%w(String Address Port Family Hex),
%w(------ ------- ---- ------ ---)]
def output_table(rows)
widths = []
rows.each {|row| row.each_with_index {|col, i| widths[i] = [widths[i].to_i, col.to_s.length].max }}
format = widths.map {|size| "%#{size}s"}.join("\t")
rows.each {|row| puts format % row}
end
TESTCASES.each do |str|
case str # handle port; IPAddr does not.
when /\A\[(?<address> .* )\]:(?<port> \d+ )\z/x # string like "[::1]:80"
address, port = $~[:address], $~[:port]
when /\A(?<address> [^:]+ ):(?<port> \d+ )\z/x # string like "127.0.0.1:80"
address, port = $~[:address], $~[:port]
else # string with no port number
address, port = str, nil
end
ip_addr = IPAddr.new(address)
family = "IPv4" if ip_addr.ipv4?
family = "IPv6" if ip_addr.ipv6?
output << [str, ip_addr.to_s, port.to_s, family, ip_addr.to_i.to_s(16)]
end
output_table(output)
- Output:
String Address Port Family Hex
------ ------- ---- ------ ---
127.0.0.1 127.0.0.1 IPv4 7f000001
127.0.0.1:80 127.0.0.1 80 IPv4 7f000001
::1 ::1 IPv6 1
[::1]:80 ::1 80 IPv6 1
2605:2700:0:3::4713:93e3 2605:2700:0:3::4713:93e3 IPv6 260527000000000300000000471393e3
[2605:2700:0:3::4713:93e3]:80 2605:2700:0:3::4713:93e3 80 IPv6 260527000000000300000000471393e3
Rust
use std::{
net::{IpAddr, SocketAddr},
str::FromStr,
};
#[derive(Clone, Debug)]
struct Addr {
addr: IpAddr,
port: Option<u16>,
}
impl std::fmt::Display for Addr {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let ipv = if self.addr.is_ipv4() { "4" } else { "6" };
let hex = match self.addr {
IpAddr::V4(addr) => u32::from(addr) as u128,
IpAddr::V6(addr) => u128::from(addr),
};
match self.port {
Some(p) => write!(
f,
"address: {}, port: {}, hex: {:x} (IPv{})",
self.addr, p, hex, ipv
),
None => write!(
f,
"address: {}, port: N/A, hex: {:x} (IPv{}) ",
self.addr, hex, ipv
),
}
}
}
impl FromStr for Addr {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
if let Ok(addr) = s.parse::<IpAddr>() {
Ok(Self { addr, port: None })
} else if let Ok(sock) = s.parse::<SocketAddr>() {
Ok(Self {
addr: sock.ip(),
port: Some(sock.port()),
})
} else {
Err(())
}
}
}
fn print_addr(s: &str) {
match s.parse::<Addr>() {
Ok(addr) => println!("{}: {}", s, addr),
_ => println!("{} not a valid address", s),
}
}
fn main() {
[
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80",
]
.iter()
.cloned()
.for_each(print_addr);
}
Scala
Full blown ultimate solution
- Output:
Best seen running in your browser Scastie (remote JVM).
object IPparser extends App {
/*
Parse an IP (v4/v6) Address
This software can parse all ipv4/ipv6 address text representations
of IP Address in common usage against the IEF RFC 5952 specification.
The results of the parse are:
- The parts of the text are valid representations. This is indicated in the list by a ✔ or ✘.
- The intended version; 4 or 6.
- Compliance with RFC 5952 in respect with double colons Compressed zeroes expansion ('::') and lower case letters.
- Hexadecimal representation of the intended IP address.
- If part in the text the port number which is optional.
- The used text string search pattern.
As much of the information is produced if there are invalid parts in the remark field.
*/
def myCases = Map(
"http:" -> IPInvalidAddressComponents(remark = "No match at all: 'http:'."),
"http://" -> IPInvalidAddressComponents(remark = "No match at all: 'http://'."),
"http:// " -> IPInvalidAddressComponents(remark = "No match at all: 'http:// '."),
"http://127.0.0.1/" -> ResultContainer(4, BigInt("7F000001", 16)),
"http://127.0.0.1:80/" -> ResultContainer(4, BigInt("7F000001", 16), Some(80)),
"http://127.0.0.1:65536" ->
IPInvalidAddressComponents(4, BigInt("7F000001", 16), Some(65536), remark = "Port number out of range."),
"http://192.168.0.1" -> ResultContainer(4, BigInt("C0A80001", 16)),
"http:/1::" -> ResultContainer(6, BigInt("10000000000000000000000000000", 16)),
"http:/2001:0db8:0:0:0:0:1428:57ab/" -> ResultContainer(6, BigInt("20010db80000000000000000142857ab", 16)),
"2001:0db8:0:0:8d3:0:0:0" -> ResultContainer(6, BigInt("20010db80000000008d3000000000000", 16)),
"2001:db8:0:0:8d3::" -> ResultContainer(6, BigInt("20010db80000000008d3000000000000", 16)),
"http:/2001:db8:3:4::192.0.2.33" -> ResultContainer(6, BigInt("20010db80003000400000000c0000221", 16)),
"2001:db8:85a3:0:0:8a2e:370:7334" -> ResultContainer(6, BigInt("20010db885a3000000008a2e03707334", 16)),
"2001:db8::1428:57ab" -> ResultContainer(6, BigInt("20010db80000000000000000142857ab", 16)),
"2001:db8::8d3:0:0:0" -> ResultContainer(6, BigInt("20010db80000000008d3000000000000", 16)),
"256.0.0.0" -> IPInvalidAddressComponents(4, remark = "Invalid octets."),
"2605:2700:0:3::4713:93e3" -> ResultContainer(6, BigInt("260527000000000300000000471393e3", 16)),
"::" -> ResultContainer(6, BigInt("00000000000000000000000000000000", 16)),
"1::8" -> ResultContainer(6, BigInt("00010000000000000000000000000008", 16)),
"::1" -> ResultContainer(6, BigInt("00000000000000000000000000000001", 16)),
"::192.168.0.1" -> ResultContainer(6, BigInt("000000000000000000000000c0a80001", 16)),
"::255.255.255.255" -> ResultContainer(6, BigInt("000000000000000000000000ffffffff", 16)),
"http:/[::255.255.255.255]:65536" ->
IPInvalidAddressComponents(6, BigInt("000000000000000000000000ffffffff", 16), Some(65536), remark = "Port number out of range."),
"::2:3:4:5:6:7:8" -> ResultContainer(6, BigInt("00000002000300040005000600070008", 16), strictRFC5952 = false),
"::8" -> ResultContainer(6, BigInt("00000000000000000000000000000008", 16)),
"::c0a8:1" -> ResultContainer(6, BigInt("000000000000000000000000c0a80001", 16)),
"::ffff:0:255.255.255.255" -> ResultContainer(6, BigInt("0000000000000000ffff0000ffffffff", 16)),
"::ffff:127.0.0.0.1" -> IPInvalidAddressComponents(4, remark = "Address puntation error: ':127.0.0.0.1'."),
"::ffff:127.0.0.1" -> ResultContainer(6, BigInt("00000000000000000000ffff7f000001", 16)),
"::ffff:192.168.0.1" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a80001", 16)),
"::ffff:192.168.173.22" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a8ad16", 16)),
"::ffff:255.255.255.255" -> ResultContainer(6, BigInt("00000000000000000000ffffffffffff", 16)),
"::ffff:71.19.147.227" -> ResultContainer(6, BigInt("00000000000000000000ffff471393e3", 16)),
"1:2:3:4:5:6:7::" -> ResultContainer(6, BigInt("00010002000300040005000600070000", 16), strictRFC5952 = false),
"8000:2:3:4:5:6:7::" -> ResultContainer(6, BigInt("80000002000300040005000600070000", 16), strictRFC5952 = false),
"1:2:3:4:5:6::8" -> ResultContainer(6, BigInt("00010002000300040005000600000008", 16), strictRFC5952 = false),
"1:2:3:4:5::8" -> ResultContainer(6, BigInt("00010002000300040005000000000008", 16)),
"1::7:8" -> ResultContainer(6, BigInt("00010000000000000000000000070008", 16)),
"a::b::1" -> IPInvalidAddressComponents(remark = "Noise found: 'a::b::1'."),
"fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" -> ResultContainer(6, BigInt("0fffffffffffffffffffffffffffffff", 16)),
"FFFF:ffff:ffff:ffff:ffff:ffff:ffff:ffff" -> ResultContainer(6, BigInt("ffffffffffffffffffffffffffffffff", 16), strictRFC5952 = false),
"ffff:ffff:ffff:fffg:ffff:ffff:ffff:ffff" -> IPInvalidAddressComponents(remark = "No match at all: 'ffff:ffff:ffff:fffg…'."),
"g::1" -> IPInvalidAddressComponents(6, remark ="Invalid input 'g::1'."),
"[g::1]:192.0.2.33" -> IPInvalidAddressComponents(4, remark = "Address puntation error: ':192.0.2.33'."),
"1:2:3:4:5:6:7:8" -> ResultContainer(6, BigInt("00010002000300040005000600070008", 16)),
"1:2:3:4:5::7:8" -> ResultContainer(6, BigInt("00010002000300040005000000070008", 16), strictRFC5952 = false),
"1:2:3:4::6:7:8" -> ResultContainer(6, BigInt("00010002000300040000000600070008", 16), strictRFC5952 = false),
"1:2:3:4::8" -> ResultContainer(6, BigInt("00010002000300040000000000000008", 16)),
"1:2:3::5:6:7:8" -> ResultContainer(6, BigInt("00010002000300000005000600070008", 16), strictRFC5952 = false),
"1:2:3::8" -> ResultContainer(6, BigInt("00010002000300000000000000000008", 16)),
"1:2::4:5:6:7:8" -> ResultContainer(6, BigInt("00010002000000040005000600070008", 16), strictRFC5952 = false),
"1:2::8" -> ResultContainer(6, BigInt("00010002000000000000000000000008", 16)),
"1::3:4:5:6:7:8" -> ResultContainer(6, BigInt("00010000000300040005000600070008", 16), strictRFC5952 = false),
"1::4:5:6:7:8" -> ResultContainer(6, BigInt("00010000000000040005000600070008", 16)),
"1::5:6:7:8" -> ResultContainer(6, BigInt("00010000000000000005000600070008", 16)),
"[1::6:7:8]" -> ResultContainer(6, BigInt("0010000000000000000000600070008", 16)),
"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" -> ResultContainer(6, BigInt("ffffffffffffffffffffffffffffffff", 16)),
"64:ff9b::192.0.2.33" -> ResultContainer(6, BigInt("0064ff9b0000000000000000c0000221", 16)),
"64:ff9b::256.0.2.33" ->
IPInvalidAddressComponents(6, BigInt("0064ff9b000000000000000000000000", 16), remark = "Invalid octets."),
"[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443" -> ResultContainer(6, BigInt("20010db885a308d313198a2e03707348", 16), Some(443)),
"[2001:db8:85a3:8d3:1319:8a2e:370:7348]:100000" ->
IPInvalidAddressComponents(6, BigInt("20010db885a308d313198a2e03707348", 16), Some(100000), remark = "Port number out of range."),
"[2605:2700:0:3::4713:93e3]:80" -> ResultContainer(6, BigInt("260527000000000300000000471393e3", 16), Some(80)),
"[::ffff:192.168.0.1]:22" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a80001", 16), Some(22)),
"[::ffff:192.168.173.22]:80" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a8ad16", 16), Some(80)),
"[::ffff:71.19.147.227]:80" -> ResultContainer(6, BigInt("00000000000000000000FFFF471393E3", 16), Some(80)),
"2001:0DB8:0:0:0:0:1428:57AB" -> ResultContainer(6, BigInt("20010DB80000000000000000142857AB", 16), strictRFC5952 = false),
"2001:0DB8:0:0:8D3:0:0:0" -> ResultContainer(6, BigInt("20010DB80000000008D3000000000000", 16), strictRFC5952 = false),
"2001:DB8:0:0:8D3::" -> ResultContainer(6, BigInt("20010DB80000000008D3000000000000", 16), strictRFC5952 = false),
"2001:DB8:3:4::192.0.2.33" -> ResultContainer(6, BigInt("20010DB80003000400000000C0000221", 16), strictRFC5952 = false),
"2001:DB8:85A3:0:0:8A2E:370:7334" -> ResultContainer(6, BigInt("20010DB885A3000000008A2E03707334", 16), strictRFC5952 = false),
"2001:DB8::1428:57AB" -> ResultContainer(6, BigInt("20010DB80000000000000000142857AB", 16), strictRFC5952 = false),
"2001:DB8::8D3:0:0:0" -> ResultContainer(6, BigInt("20010DB80000000008D3000000000000", 16), strictRFC5952 = false),
"2605:2700:0:3::4713:93E3" -> ResultContainer(6, BigInt("260527000000000300000000471393E3", 16), strictRFC5952 = false),
"::192.168.0.1" -> ResultContainer(6, BigInt("000000000000000000000000C0A80001", 16)),
"::255.255.255.255" -> ResultContainer(6, BigInt("000000000000000000000000FFFFFFFF", 16)),
"::C0A8:1" -> ResultContainer(6, BigInt("000000000000000000000000c0a80001", 16), strictRFC5952 = false),
"::FFFF:0:255.255.255.255" -> ResultContainer(6, BigInt("0000000000000000FFFF0000FFFFFFFF", 16), strictRFC5952 = false),
"::FFFF:127.0.0.0.1" -> IPInvalidAddressComponents(4, remark = "Address puntation error: ':127.0.0.0.1'."),
"::FFFF:127.0.0.1" -> ResultContainer(6, BigInt("00000000000000000000FFFF7F000001", 16), strictRFC5952 = false),
"::FFFF:192.168.0.1" -> ResultContainer(6, BigInt("00000000000000000000FFFFC0A80001", 16), strictRFC5952 = false),
"::FFFF:192.168.173.22" -> ResultContainer(6, BigInt("00000000000000000000FFFFC0A8AD16", 16), strictRFC5952 = false),
"::FFFF:255.255.255.255" -> ResultContainer(6, BigInt("00000000000000000000FFFFFFFFFFFF", 16), strictRFC5952 = false),
"::FFFF:71.19.147.227" -> ResultContainer(6, BigInt("00000000000000000000FFFF471393E3", 16), strictRFC5952 = false),
"[1::]:80" -> ResultContainer(6, BigInt("00010000000000000000000000000000", 16), Some(80)),
"[2001:DB8:85A3:8D3:1319:8A2E:370:7348]:443" -> ResultContainer(6, BigInt("20010db885a308d313198a2e03707348", 16), Some(443), strictRFC5952 = false),
"[2605:2700:0:3::4713:93E3]:80" -> ResultContainer(6, BigInt("260527000000000300000000471393e3", 16), Some(80), strictRFC5952 = false),
"[::1]:80" -> ResultContainer(6, BigInt("00000000000000000000000000000001", 16), Some(80)),
"[::1]:65536" ->
IPInvalidAddressComponents(6, BigInt("00000000000000000000000000000001", 16), Some(65536), remark = "Port number out of range."),
"[::]:80" -> ResultContainer(6, BigInt("00000000000000000000000000000000", 16), Some(80)),
"[::FFFF:192.168.0.1]:22" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a80001", 16), Some(22), strictRFC5952 = false),
"[::FFFF:192.168.173.22]:80" -> ResultContainer(6, BigInt("00000000000000000000ffffc0a8ad16", 16), Some(80), strictRFC5952 = false),
"[::FFFF:71.19.147.227]:80" -> ResultContainer(6, BigInt("00000000000000000000ffff471393e3", 16), Some(80), strictRFC5952 = false),
"A::B::1" -> IPInvalidAddressComponents(remark = "Noise found: 'A::B::1'."),
"FFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF" -> ResultContainer(6, BigInt("0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 16), strictRFC5952 = false),
"FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF" -> ResultContainer(6, BigInt("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 16), strictRFC5952 = false),
"FFFF:FFFF:FFFF:FFFG:FFFF:FFFF:FFFF:FFFF" -> IPInvalidAddressComponents(remark = "No match at all: 'FFFF:FFFF:FFFF:FFFG…'."),
"G::1" -> IPInvalidAddressComponents(6, remark = "Invalid input 'G::1'."),
"64:FF9B::192.0.2.33" -> ResultContainer(6, BigInt("0064FF9B0000000000000000C0000221", 16), strictRFC5952 = false),
"64:FF9B::256.0.2.33" -> IPInvalidAddressComponents(6, BigInt("0064FF9B000000000000000000000000", 16), remark = "Invalid octets.")
)
def IPInvalidAddressComponents(version: Int = 0,
address: BigInt = BigInt(0),
port: Option[Int] = None,
valid: Boolean = false,
remark: String = "",
strict: Boolean = false) = ResultContainer(version, address, port, valid, remark, strict)
case class ResultContainer(version: Int,
address: BigInt,
port: Option[Int] = None,
valid: Boolean = true,
remark: String = "",
strictRFC5952: Boolean = true)
class IpAddress(val originalString: String) {
import IpAddress._
val (usedPattern, result: ResultContainer) = originalString match {
case trapPattern() => (trapPattern, IPInvalidAddressComponents(remark = s"Noise found: '${shortener(originalString)}'."))
case allIpV6PortedPatternsCompiled(adr, port) => parseIpV6(adr, Option(port).map(_.toInt))
case allIpV6UnspecPortPatternsCompiled(adr) => parseIpV6(adr)
case ipV4PortSpecCompiled(adr, port) => (ipV4PortSpecCompiled, parseIpV4(adr, Option(port).map(_.toInt)))
case _ => ("Exhausted of all matches.", IPInvalidAddressComponents(remark = s"No match at all: '${shortener(originalString, 19)}'."))
}
override def toString: String = {
def hexAddr = if (result.version == 6) f"${result.address}%#034x" else f"${result.address}%#010x"
def validInd = if (result.valid) '\u2714' else '\u2718'
def rfc5952 = if (result.strictRFC5952) "comply" else "broken"
def version = result.version match {
case 0 => " ?"
case 4 => "IPv4"
case 6 => "IPv6"
}
def surround(s: String) = if (result.valid) s" $s " else s"($s)"
def port = if (result.port.isDefined) surround(result.port.get.toString) else if (result.valid) " " else "? "
def hexAddrField = f"${if (result.valid || result.address != 0) surround(hexAddr) else "? "}%36s "
f"${shortener(originalString, 45)}%46s $version $validInd $rfc5952 $hexAddrField $port%8s ${result.remark}%-40s $usedPattern"
}
def shortener(s: String, maxlength: Int = 12): String = {
val size = s.length()
s.substring(0, math.min(size, maxlength)) + (if (size > maxlength) "…" else "")
}
private def parseIpV6(ipAddress: String, port: Option[Int] = None): (String, ResultContainer) = {
def colonedStringToBigInt(colonedString: String): (BigInt, Int) = {
// Compressed zeroes expansion
val ar = if (colonedString contains "::") colonedString.split("::", 2) else Array("", colonedString)
val (left, right) = (ar.head.split(':').filterNot(_.isEmpty), ar(1).split(':').filterNot(_.isEmpty))
val sixteenBitExpansions = 8 - (right.length + left.length)
((left ++ Seq.fill(sixteenBitExpansions)("0") ++ right)
.map(BigInt(_, 16).toLong).map(BigInt(_)).reduceLeft((acc, i) => (acc << 16) | i),
sixteenBitExpansions)
}
def parseEmbeddedV4(seg: String, ip4Seg: String, usedRegEx: String): (String, ResultContainer) = {
val (ip4, ip6Parser, test) =
(parseIpV4(ip4Seg), colonedStringToBigInt(seg.replaceFirst(ipV4Regex("3"), "0:0")), portNumberTest(port))
(usedRegEx, ResultContainer(originalString, 6, ip4.address + ip6Parser._1, port,
ip4.valid && test.isEmpty, ip4.remark + test, ip4.valid && test.isEmpty))
}
if (!ipAddress.forall((('A' to 'F') ++ ('a' to 'f') ++ ('0' to '9') ++ Vector(':', '.')).contains(_)))
("[^:.[0-9][A-F][a-f]]", IPInvalidAddressComponents(6, remark = s"Invalid input '${shortener(ipAddress)}'."))
else
ipAddress match {
case pattern10Compiled(seg, ip4Seg) => parseEmbeddedV4(seg, ip4Seg, pattern10Compiled.toString())
case pattern11Compiled(seg, ip4Seg) => parseEmbeddedV4(seg, ip4Seg, pattern11Compiled.toString())
case ip6PatternsRawCompiled(seg, _*) =>
val (ip6Parser, test) = (colonedStringToBigInt(seg), portNumberTest(port))
(ip6PatternsRawCompiled.toString(),
ResultContainer(ipAddress, 6, ip6Parser._1, port,
valid = test.isEmpty, test, strictRFC5952 = ip6Parser._2 != 1 && test.isEmpty))
case _ => ("V6 match exhausted.", IPInvalidAddressComponents(6, remark = "V6 address puntation error."))
}
} // parseIpV6
private def parseIpV4(sIP: String, port: Option[Int] = None): ResultContainer = {
def wordsToNum(words: Array[Long]): Long = words.reduceLeft((acc, i) => (acc << 8) | i)
if (sIP.head.isDigit && sIP.matches(ipV4Regex("3"))) {
val octets = sIP.split('.').map(_.toLong)
if (octets.forall(_ < 256)) {
val portNumberOK = portNumberTest(port)
ResultContainer(4, BigInt(wordsToNum(octets)), port, portNumberOK.isEmpty, portNumberOK, portNumberOK.isEmpty)
} else IPInvalidAddressComponents(4, remark = "Invalid octets.")
}
else IPInvalidAddressComponents(4, remark = s"Address puntation error: '${shortener(sIP)}'.")
}
private def portNumberTest(port: Option[Int]) = if (port.isEmpty || port.get < math.pow(2, 16)) "" else "Port number out of range."
} // IpAddress
object IpAddress {
val (ip6PatternsRawCompiled, pattern11Compiled) = (ipV6Patterns.mkString("(", "|", ")").r, embeddedV4patterns()(1).r)
val (trapPattern, pattern10Compiled) = (""".*?(?:(?:\w*:{2,}?){2,}?\w)|(?:\[?)""".r, embeddedV4patterns().head.r)
val allIpV6PortedPatternsCompiled = ("""[^\\.]*?\[(""" + allIpV6 +""")\](?::(\d{1,6}))?[^\.:]*?""").r
val allIpV6UnspecPortPatternsCompiled = (""".*?(""" + allIpV6 +""")[^\.:]*?""").r
val ipV4PortSpecCompiled = s".*?([:.\\]]?${ipV4Regex()})(?::(\\d{1,6}))?.*?".r
// Make a regex pattern with non-capturing groups by the disabling the capturing group syntax (?:).
def allIpV6 = (embeddedV4patterns("(?:") ++ ipV6Patterns).map(s => "(?:" + s.drop(1)).mkString("|")
def ipV6Patterns = {
def ipV6SegRegWC = """\w{1,4}"""
Seq(
s"((?::(?:(?::$ipV6SegRegex){1,7}|:)))",
s"((?:$ipV6SegRegWC:(?::$ipV6SegRegex){1,6}))",
s"((?:$ipV6SegRegex:){1,2}(?::$ipV6SegRegex){1,5})",
s"((?:$ipV6SegRegex:){1,3}(?::$ipV6SegRegex){1,4})",
s"((?:$ipV6SegRegex:){1,4}(?::$ipV6SegRegex){1,3})",
s"((?:$ipV6SegRegex:){1,5}(?::$ipV6SegRegex){1,2})",
s"((?:$ipV6SegRegex:){1,6}:$ipV6SegRegex)",
s"((?:$ipV6SegRegex:){1,7}:)",
s"((?:$ipV6SegRegex:){7}$ipV6SegRegex)"
)
}
private def embeddedV4patterns(nonCapturePrefix: String = "(") =
Seq(s"(::(?:(?:FFFF|ffff)(?::0{1,4}){0,1}:){0,1}$nonCapturePrefix${ipV4Regex("3")}))",
s"((?:$ipV6SegRegex:){1,4}:$nonCapturePrefix${ipV4Regex("3")}))")
private def ipV6SegRegex = """[\dA-Fa-f]{1,4}"""
private def ipV4Regex(octets: String = "3,") = s"(?:\\d{1,3}\\.){$octets}\\d{1,3}"
}
object ResultContainer {
def apply(orginalString: String, version: Int,
address: BigInt, port: Option[Int],
valid: Boolean, remark: String,
strictRFC5952: Boolean): ResultContainer =
// To comply with strictRFC5952 all alpha character must be lowercase too.
this (version, address, port, valid, remark, strictRFC5952 && !orginalString.exists(_.isUpper))
}
{
val headline = Seq(f"${"IP addresses to be parsed. "}%46s", "Ver.", f"${"S"}%1s", "RFC5952",
f"${"Hexadecimal IP address"}%34s", f"${"Port "}%10s", f"${" Remark"}%-40s", f"${" Effective RegEx"}%-40s")
println(headline.mkString("|") + "\n" + headline.map(s => "-" * s.length).mkString("+"))
val cases: Set[IpAddress] = myCases.keySet.map(new IpAddress(_))
println(cases.toList.sortBy(s => (s.originalString.length, s.originalString)).mkString("\n"))
logInfo(s"Concluding: ${myCases.size} cases processed, ${cases.count(_.result.valid)} valid ✔ and ${cases.count(!_.result.valid)} invalid ✘.")
logInfo("Successfully completed without errors.")
def logInfo(info: String) {
println(f"[Info][${System.currentTimeMillis() - executionStart}%5d ms]" + info)
}
}
} // IPparser cloc.exe : 235 loc
Tcl
package require Tcl 8.5
package require ip
proc parseIP {address} {
set result {}
set family [ip::version $address]
set port -1
if {$family == -1} {
if {[regexp {^\[(.*)\]:(\d+)$} $address -> address port]} {
dict set result port $port
set family [ip::version $address]
if {$family != 6} {
return -code error "bad address"
}
} elseif {[regexp {^(.*):(\d+)$} $address -> address port]} {
dict set result port $port
set family [ip::version $address]
if {$family != 4} {
return -code error "bad address"
}
} else {
return -code error "bad address"
}
}
# Only possible error in ports is to be too large an integer
if {$port > 65535} {
return -code error "bad port"
}
dict set result family $family
if {$family == 4} {
# IPv4 normalized form is dotted quad, but toInteger helps
dict set result addr [format %x [ip::toInteger $address]]
} else {
# IPv6 normalized form is colin-separated hex
dict set result addr [string map {: ""} [ip::normalize $address]]
}
# Return the descriptor dictionary
return $result
}
Demonstration code:
foreach address {
127.0.0.1
127.0.0.1:80
::1
[::1]:80
2605:2700:0:3::4713:93e3
[2605:2700:0:3::4713:93e3]:80
::ffff:192.168.0.1
[::ffff:192.168.0.1]:22
::ffff:127.0.0.0.1
a::b::1
127.0.0.1:100000
} {
if {[catch {
set parsed [parseIP $address]
} msg]} {
puts "error ${msg}: \"$address\""
continue
}
dict with parsed {
puts -nonewline "family: IPv$family addr: $addr"
if {[dict exists $parsed port]} {
puts -nonewline " port: $port"
}
puts ""
}
}
Output:
family: IPv4 addr: 7f000001 family: IPv4 addr: 7f000001 port: 80 family: IPv6 addr: 00000000000000000000000000000001 family: IPv6 addr: 00000000000000000000000000000001 port: 80 family: IPv6 addr: 260527000000000300000000471393e3 family: IPv6 addr: 260527000000000300000000471393e3 port: 80 family: IPv6 addr: 00000000000000000000ffffc0a80001 family: IPv6 addr: 00000000000000000000ffffc0a80001 port: 22 error bad address: "::ffff:127.0.0.0.1" error bad address: "a::b::1" error bad port: "127.0.0.1:100000"
VBScript
Function parse_ip(addr)
'ipv4 pattern
Set ipv4_pattern = New RegExp
ipv4_pattern.Global = True
ipv4_pattern.Pattern = "(\d{1,3}\.){3}\d{1,3}"
'ipv6 pattern
Set ipv6_pattern = New RegExp
ipv6_pattern.Global = True
ipv6_pattern.Pattern = "([0-9a-fA-F]{0,4}:){2}[0-9a-fA-F]{0,4}"
'test if address is ipv4
If ipv4_pattern.Test(addr) Then
port = Split(addr,":")
octet = Split(port(0),".")
ipv4_hex = ""
For i = 0 To UBound(octet)
If octet(i) <= 255 And octet(i) >= 0 Then
ipv4_hex = ipv4_hex & Right("0" & Hex(octet(i)),2)
Else
ipv4_hex = "Erroneous Address"
Exit For
End If
Next
parse_ip = "Test Case: " & addr & vbCrLf &_
"Address: " & ipv4_hex & vbCrLf
If UBound(port) = 1 Then
If port(1) <= 65535 And port(1) >= 0 Then
parse_ip = parse_ip & "Port: " & port(1) & vbCrLf
Else
parse_ip = parse_ip & "Port: Invalid" & vbCrLf
End If
End If
End If
'test if address is ipv6
If ipv6_pattern.Test(addr) Then
parse_ip = "Test Case: " & addr & vbCrLf
port_v6 = "Port: "
ipv6_hex = ""
'check and extract port information if any
If InStr(1,addr,"[") Then
'extract the port
port_v6 = port_v6 & Mid(addr,InStrRev(addr,"]")+2,Len(addr)-Len(Mid(addr,1,InStrRev(addr,"]")+1)))
'extract the address
addr = Mid(addr,InStrRev(addr,"[")+1,InStrRev(addr,"]")-(InStrRev(addr,"[")+1))
End If
word = Split(addr,":")
word_count = 0
For i = 0 To UBound(word)
If word(i) = "" Then
If i < UBound(word) Then
If Int((7-(i+1))/2) = 1 Then
k = 1
ElseIf UBound(word) < 6 Then
k = Int((7-(i+1))/2)
ElseIf UBound(word) >= 6 Then
k = Int((7-(i+1))/2)-1
End If
For j = 0 To k
ipv6_hex = ipv6_hex & "0000"
word_count = word_count + 1
Next
Else
For j = 0 To (7-word_count)
ipv6_hex = ipv6_hex & "0000"
Next
End If
Else
ipv6_hex = ipv6_hex & Right("0000" & word(i),4)
word_count = word_count + 1
End If
Next
parse_ip = parse_ip & "Address: " & ipv6_hex &_
vbCrLf & port_v6 & vbCrLf
End If
'test if the address in invalid
If ipv4_pattern.Test(addr) = False And ipv6_pattern.Test(addr) = False Then
parse_ip = "Test Case: " & addr & vbCrLf &_
"Address: Invalid Address" & vbCrLf
End If
End Function
'Testing the function
ip_arr = Array("127.0.0.1","127.0.0.1:80","::1",_
"[::1]:80","2605:2700:0:3::4713:93e3","[2605:2700:0:3::4713:93e3]:80","RosettaCode")
For n = 0 To UBound(ip_arr)
WScript.StdOut.Write parse_ip(ip_arr(n)) & vbCrLf
Next
- Output:
Test Case: 127.0.0.1 Address: 7F000001 Test Case: 127.0.0.1:80 Address: 7F000001 Port: 80 Test Case: ::1 Address: 00000000000000000000000000000001 Port: Test Case: [::1]:80 Address: 00000000000000000000000000000001 Port: 80 Test Case: 2605:2700:0:3::4713:93e3 Address: 260527000000000300000000471393e3 Port: Test Case: [2605:2700:0:3::4713:93e3]:80 Address: 260527000000000300000000471393e3 Port: 80 Test Case: RosettaCode Address: Invalid Address
V (Vlang)
const data =
("
127.0.0.1
127.0.0.1:80
::1
[::1]:80
2605:2700:0:3::4713:93e3
[2605:2700:0:3::4713:93e3]:80
")
fn main() {
mut output :=""
for val in data.split("\n") {
if val !="" {
xarr := parse_ip(val)
output += "input = " + val + "\t>\t" + xarr[0] +
if xarr[1] !="" {" port : " + xarr[1]} else {""} + "\n"
}
}
println(output)
}
fn parse_ip(address string) []string {
return if address.contains(".") {ipv4(address)} else {ipv6(address)}
}
fn ipv4(address string) []string {
mut num, mut port := "", ""
for val in address.split(".") {
xarr := val.split(":")
num += xarr[0].int().hex2().replace("x","")
if xarr.len > 1 {port = xarr[1]} else {port =""}
}
return [num, port]
}
fn ipv6(address string) []string {
mut num, mut port := "", ""
for idx, val in address.split("]") {
if idx == 0 {
for xal in val.trim_left("[:").split(":") {
if xal =="" {num += "00000000"} else {num += "0000".substr(0, 4 - xal.len) + xal}
}
}
else {port = val.trim_left(":")}
}
return ["00000000000000000000000000000000".substr(0, 32 - num.len) + num, port]
}
- Output:
input = 127.0.0.1 > 07f000001 input = 127.0.0.1:80 > 07f000001 port : 80 input = ::1 > 00000000000000000000000000000001 input = [::1]:80 > 00000000000000000000000000000001 port : 80 input = 2605:2700:0:3::4713:93e3 > 260527000000000300000000471393e3 input = [2605:2700:0:3::4713:93e3]:80 > 260527000000000300000000471393e3 port : 80
Wren
import "./dynamic" for Enum, Tuple
import "./big" for BigInt
import "./str" for Str
import "./fmt" for Conv, Fmt
var AddressSpace = Enum.create("AddressSpace", ["IPv4", "IPv6", "Invalid"])
// a port of -1 denotes 'not specified'
var IPAddressComponents = Tuple.create("IPAddressComponents", ["address", "addressSpace", "port"])
var INVALID = IPAddressComponents.new(BigInt.zero, AddressSpace.Invalid, 0)
var ipAddressParse = Fn.new { |ipAddress|
var addressSpace = AddressSpace.IPv4
var ipa = Str.lower(ipAddress)
var port = -1
var trans = false
if (ipa.startsWith("::ffff:") && ipa.contains(".")) {
addressSpace = AddressSpace.IPv6
trans = true
ipa = ipa[7..-1]
} else if (ipa.startsWith("[::ffff:") && ipa.contains(".")) {
addressSpace = AddressSpace.IPv6
trans = true
ipa = ipa[8..-1].replace("]", "")
}
var octets = ipa.split(".")[-1..0].toList
var address = BigInt.zero
if (octets.count == 4) {
var split = octets[0].split(":")
if (split.count == 2) {
var temp = Num.fromString(split[1])
if (!temp || temp < 0 || temp > 65535) return INVALID
port = temp
octets[0] = split[0]
}
for (i in 0..3) {
var num = Num.fromString(octets[i])
if (!num || num < 0 || num > 255) return INVALID
var bigNum = BigInt.new(num)
address = address | (bigNum << (i * 8))
}
if (trans) address = address + BigInt.fromBaseString("ffff00000000", 16)
} else if (octets.count == 1) {
addressSpace = AddressSpace.IPv6
if (ipa[0] == "[") {
ipa = ipa[1..-1]
var split = ipa.split("]:")
if (split.count != 2) return INVALID
var temp = Num.fromString(split[1])
if (!temp || temp < 0 || temp > 65535) return INVALID
port = temp
ipa = ipa[0...(-2 - split[1].count)]
}
var hextets = ipa.split(":")[-1..0].toList
var len = hextets.count
if (ipa.startsWith("::")) {
hextets[-1] = "0"
} else if (ipa.endsWith("::")) {
hextets[0] = "0"
}
if (ipa == "::") hextets[1] = "0"
if (len > 8 || (len == 8 && hextets.any { |h| h == "" }) || hextets.count { |h| h == "" } > 1) {
return INVALID
}
if (len < 8) {
var insertions = 8 - len
for (i in 0..7) {
if (hextets[i] == "") {
hextets[i] = "0"
while (insertions > 0) {
insertions = insertions - 1
hextets.insert(i, "0")
}
break
}
}
}
for (j in 0..7) {
var num = Conv.atoi(hextets[j], 16)
if (num > 0xFFFF) return INVALID
var bigNum = BigInt.new(num)
address = address | (bigNum << (j * 16))
}
} else return INVALID
return IPAddressComponents.new(address, addressSpace, port)
}
var ipas = [
"127.0.0.1",
"127.0.0.1:80",
"::1",
"[::1]:80",
"2605:2700:0:3::4713:93e3",
"[2605:2700:0:3::4713:93e3]:80",
"::ffff:192.168.173.22",
"[::ffff:192.168.173.22]:80",
"1::",
"::",
"256.0.0.0",
"::ffff:127.0.0.0.1"
]
for (ipa in ipas) {
var ipac = ipAddressParse.call(ipa)
Fmt.print("IP address : $s", ipa)
Fmt.print("Address : $s", Str.upper(ipac.address.toBaseString(16)))
Fmt.print("Address Space : $s", AddressSpace.members[ipac.addressSpace])
Fmt.print("Port : $s", (ipac.port == -1) ? "not specified" : ipac.port.toString)
System.print()
}
- Output:
IP address : 127.0.0.1 Address : 7F000001 Address Space : IPv4 Port : not specified IP address : 127.0.0.1:80 Address : 7F000001 Address Space : IPv4 Port : 80 IP address : ::1 Address : 1 Address Space : IPv6 Port : not specified IP address : [::1]:80 Address : 1 Address Space : IPv6 Port : 80 IP address : 2605:2700:0:3::4713:93e3 Address : 260527000000000300000000471393E3 Address Space : IPv6 Port : not specified IP address : [2605:2700:0:3::4713:93e3]:80 Address : 260527000000000300000000471393E3 Address Space : IPv6 Port : 80 IP address : ::ffff:192.168.173.22 Address : FFFFC0A8AD16 Address Space : IPv6 Port : not specified IP address : [::ffff:192.168.173.22]:80 Address : FFFFC0A8AD16 Address Space : IPv6 Port : 80 IP address : 1:: Address : 10000000000000000000000000000 Address Space : IPv6 Port : not specified IP address : :: Address : 0 Address Space : IPv6 Port : not specified IP address : 256.0.0.0 Address : 0 Address Space : Invalid Port : 0 IP address : ::ffff:127.0.0.0.1 Address : 0 Address Space : Invalid Port : 0
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