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Convert from MAC to IPv6


Convert from MAC to IPv6

By : user2949460
Date : November 17 2020, 01:00 AM
should help you out Conversion step by step from a MAC address (48 bits) to a IPv6 address (128 bits):
take the mac address: 52:74:f2:b1:a8:7f throw ff:fe in the middle: 52:74:f2:ff:fe:b1:a8:7f reformat to IPv6 notation 5274:f2ff:feb1:a87f convert the first octet from hexadecimal to binary: 52 -> 01010010 invert the bit at index 6 (counting from 0): 01010010 -> 01010000 convert octet back to hexadecimal: 01010000 -> 50 replace first octet with newly calculated one: 5074:f2ff:feb1:a87f prepend the link-local prefix: fe80::5074:f2ff:feb1:a87f
code :


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Php convert ipv6 to number

Php convert ipv6 to number


By : Shubh Arora
Date : March 29 2020, 07:55 AM
To fix this issue $ip_2 is not a valid IPv6 address. You need "::" somewhere in there, to indicate the zero omission point.
If you have it as one of
code :
$ip_2='2001::11ff:ffff:f';
$ip_2='2001:11ff::ffff:f';
$ip_2='2001:11ff:ffff::f';
/**
 * @param string $ip A human readable IPv4 or IPv6 address.
 * @return string Decimal number, written out as a string due to limits on the size of int and float.
 */
function ipv6_numeric($ip) {
    $binNum = '';
    foreach (unpack('C*', inet_pton($ip)) as $byte) {
        $binNum .= str_pad(decbin($byte), 8, "0", STR_PAD_LEFT);
    }
    return base_convert(ltrim($binNum, '0'), 2, 10);
}
Convert binary to hex IPv6

Convert binary to hex IPv6


By : Arijit Chakma Anish
Date : March 29 2020, 07:55 AM
Does that help If this was an IPv6 address, your decoding would be correct (modulo some endianess issues that would result in reordering of bytes). Unfortunately, every set of 128 bits can be an IPv6 address. As @Sander Steffann noted, the IPv6 address you calculated is not currently valid. RFC 4291 describes the IPv6 Addressing Architecture, and the IANA IPv6 Address Space Assignments show which allowed addresses are reserved for what. For addresses starting with eight zeroes (0000::/8), there are only the following valid ranges: The unspecified address, only consisting of zeroes (::/128); the loopback address (::1/128); IPv4 mapped addresses (::ffff:0:0/96), which are starting with 80 zero bits; and the deprecated "IPv4-compatible IPv6 addresses" (0000::/96), which even start with 96 zero bits.
code :
$ echo "0000000000000000 0001100000000000 0000011000000000 0000000000000000 0000000001100000 0000000000011000 0000000000000110 0000000000000001" | perl -wple 's/ //g; s/(0+|1+)/length($1)."x".substr($1,0,1)." "/ge'
19x0 2x1 16x0 2x1 34x0 2x1 16x0 2x1 16x0 2x1 16x0 1x1
Convert IPv6 to IPV4 PHP

Convert IPv6 to IPV4 PHP


By : Anaya Khan
Date : March 29 2020, 07:55 AM
it should still fix some issue I have a list of IPv4 IPs selected from a database which stores the addresses as BINARY(16). Is there any simple way to convert the IPv6 formated address to human readable IPv4 format? This is what the IPv4 address looks like 8ab8:7f70:: , As Ron Maupin described, the solution is very simple
code :
$ipv6 = "8ab8:7f70::";
$ipv4 = hexdec(substr($ipv6, 0, 2)). "." . hexdec(substr($ipv6, 2, 2)). "." . hexdec(substr($ipv6, 5, 2)). "." . hexdec(substr($ipv6, 7, 2));
Convert IPv6 to hex notation

Convert IPv6 to hex notation


By : Roberto
Date : March 29 2020, 07:55 AM
it fixes the issue Using the ipaddress module:
code :
In [54]: import ipaddress

In [55]: addr = '::ffff:100.100.100.10'

In [59]: ipaddress.ip_address(addr)
Out[59]: IPv6Address('::ffff:6464:640a')

In [60]: str(ipaddress.ip_address(addr))
Out[60]: '::ffff:6464:640a'
Apps are reviewed on an IPv6 network. Please ensure that your app supports IPv6 networks, as IPv6 compatibility is requi

Apps are reviewed on an IPv6 network. Please ensure that your app supports IPv6 networks, as IPv6 compatibility is requi


By : Madondo Musa
Date : March 29 2020, 07:55 AM
With these it helps I don't think your "Convert IPv4 address to IPv4-mapped-into-IPv6 address" is correct. Rather than trying to construct an address yourself, you should call getaddrinfo() with a string of the thing you want to connect to (which could be either a hostname or an IPv4 address literal), and it will return to you a list of sockaddrs; you should use the first one from there to pass to sendto. It will give you the appropriate IP address family to use, and if you give an IPv4 address and it is an IPv6-only network (without you having to test anything), it will automatically give you the correct IPv6 address to use for that NAT64 router (without you needing to figure this out yourself). (If you wanted to manually construct an IPv6 address from IPv4 using NAT64/DNS64 without using getaddrinfo(), you would have to follow the complicated procedure in RFC 7050.)
Also, all the things you are doing in getLocalAddress() is unnecessary and potentially leads to more problems. You don't need isIPV4Available or isIPV6Available -- you shouldn't care at that point. Just create and bind both an IPv4 and an IPv6 socket in the beginning (not needing to care which one works), and each time you need to send, you get the right sockaddr to use using getaddrinfo() as above, and then send to the socket whose address family corresponds to the sockaddr you are using. And when you want to receive, you call recvfrom on both sockets.
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