ipv6

I'm using java.net.Inet6Address to validate if an input string is a valid IPv6 address or not. Here is my code snippet: public static boolean isValidIPv6ddress(String address) { if (address.isEmpty()) { return false; } try { Object res = InetAddress.getByName(address); return res instanceof Inet6Address; } catch (final UnknownHostException ex) { return false; } } Unfortunately the above method returns true even for the following inputs which are invalid : System.out.println(isValidIPv6ddress("2A00:17C8:50C:0000:0000:0000:0000:00001")); System.out.println(isValidIPv6ddress("2A00:17C8:50C:0000

This application publishes its own address for other systems to connect to using .net remoting. It gets all the addresses of the computer with something like: IPAddress[] IPList = Dns.GetHostEntry(Environment.MachineName).AddressList; string ipAddress = IPList[ipIndex].ToString(); if(ipAddress.contains(":")) { // ip6 address url = "tcp://[" + ipAddress + "]:" + port + "/" + name; } else { url = "tcp://" + ipAddress + ":" + port + "/" + name; } I added the square brackets in case it was getting confused by the colons as per this rfc. I think the problem is zone indexes - ToString() returns fe80

Sorry I don't know much about this subject, but all I'm looking for is a quick-and-easy solution for uniquely representing any IP address (v4/v6) in MySQL so I can easily retrieve the last time (if any) that a particular computer has visited my site. I don't need to do any computations on the addresses, just retrieval, so any unique representation should be ok. I do plan on storing a lot of these (don't have an estimate yet), so space may become a concern. I've seen many solutions for storing IP addresses, but it's unclear which work for both versions. MySQL's built-in INET_ATON doesn't seem

IPv4是Internet Protocol version 4的缩写，中文翻译为互联网通信协议（TCP/IP协议）第四版，通常简称为网际协议版本4。 IPv4使用32位（4字节）地址，因此地址空间中只有4,294,967,296（2^32） 个地址。 IPv4地址可被写作任何表示一个32位整数值的形式，但为了方便人类阅读和分析，它通常被写作点分十进制的形式，即四个字节被分开用十进制写出，中间用点分隔。 所以，通常IPv4地址的地址格式为nnn.nnn.nnn.nnn，如：192.168.1.255 因为在点分十进制的表达形式下，共有4个字节的IP地址被分位四段，每一段就有一个字节，而一个字节有8位，那么，8位能表示的数字范围是 0 - 255。 所以，一个IPv4的地址，格式为nnn.nnn.nnn.nnn，其中 0<=nnn<=255，而每个 n 都是十进制数。可省略前导零。 所以，一个IPv4的地址，格式为nnn.nnn.nnn.nnn，其中 0<=nnn<=255，而每个 n 都是十进制数。可省略前导零。 IPv4报文格式 我们知道，在TCP/IP 五层协议模型中，一次网络请求要先后经过应用层->传输层->网络层->数据链路层->物理层。 而在请求过程中，一个请求数据也会从应用层到物理层经过层层包装，每一层把上一层的数据报文包装后加上一层头部信息之后再传给下一层。 所以

i can trying to use GetAddrInfo to resolve ipv6.google.com : wsaError = getaddrinfo("ipv6.google.com", null, null, ref addrInfo); The returned socket error code is 11001 (No such host is known). Note : The deprecated legacy function GetHostByName does not support IPv6. It has been replaced with GetAddrInfo . The strange thing is that i can use nslookup and it can find the address just fine: Question SendRequest(), len 33 HEADER: opcode = QUERY, id = 4, rcode = NOERROR header flags: query, want recursion questions = 1, answers = 0, authority records = 0, additional = 0 QUESTIONS: ipv6.google

I'm trying to set a MQTT-SN broker (rsmb) ,and using several pi3 as clients. First , I will build a 6lowpan over ble connection. Setting pi3 (RASPBIAN JESSIE kernel v4.4) sudo su hciconfig hci0 reset modprobe bluetooth_6lowpan echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable hciconfig hci0 leadv BLE gateway (Ubuntu 14.04) sudo su hciconfig hci0 reset modprobe bluetooth_6lowpan echo 35 > /sys/kernel/debug/bluetooth/6lowpan_psm echo 1 > /proc/sys/net/ipv6/conf/all/forwarding echo "connect *my_pi3_bluetooth_address* 1" > /sys/kernel/debug/bluetooth/6lowpan_control ifconfig bt0 add 2001:xxxx

福州seo服务 重要消息： 就在 2019/11/25 UTC+1 15:35 时，一封来自欧洲 RIPE NCC 的邮件中得到确认：全球的IPv4地址已经彻底耗尽。 IPv4 大家应该很熟悉了，就是我们平常所知道的 IP 地址，如： 192.168.1.168 。 其实，很多年前就在说 IPv4 要用完了，只是没想到这天居然来得这么早，只能说互联网发展真的太快了。 对于 IPv4 地址耗尽的问题，大家也不用担心，全世界早就已经开始布局 IPv6 了，包括中国，据不完全统计，现在中国有超过 3 亿多的 IPv6 地址，居世界第一。 那么 IPv6 到底是啥，和 IPv4 有啥区别呢？ IPv6 即：Internet Protocol Version 6，第 6 代互联网协议，它的制定就是为了解决和应对 IPv4 即将会耗尽的问题的，毕竟 IPv4 数量有限，互联网又发展这么快，在可预见的将来，不……它现在已经用完了。 所以说，它们最大的区别就是数量了。 IPv4 最大网络地址数为：2^32 个（32位），即不到 43 亿个地址，而 IPv6 可达到 2^128 个（128位），具体多少已经数不清了，需要用科学表达式来表达了，但是可以知道的是，在可预见的未来是足够用了。 另外，IPv6 的格式和组成也和 IPv4 有相当大的区别，说了这么多，到底长啥样？ 来看下面的地址，都是