ipv6

问题 I know that this question has been asked quite a few times, but I could not find anywhere a final resolution; so here goes: How do you store an IP (both IPv4 and IPv6) using best-practice, within a DB, without knowing the DB? This in case for DB abstraction purposes, such as PHP PDO. On a minor note, I have PHP 5.2.17, as I needed PEAR on windows. People have been suggesting to store it as a varbinary(16) and use mysql functions inet6_ntop and inet6_pton to pass IPs back and forth as strings;

问题 I'm using a library that uses java.net.InetAddress.getLocalHost().getHostAddress() to get my local IP address. However, this always returns an IPv6 address on my computer (Gentoo Linux, JDK 1.6.0_37). The address is further used in a context which does not support IPv6 addresses and thus fails. Is there some way to force getHostAddress() to return a IPv4 address (e.g. through a parameter to JVM)? 回答1: You can set it to use IPv4 when avaiable. Of course, there are a great number more IPv6

问题 I am aware of ntoh{s,l} and hton{s,l} , which work on integers of 2 and 4 bytes. Now, I am facing the problem to translate an IPv6 address, which is 16 bytes long. Is there a ready-made function for that purpose? TIA, Jir 回答1: I'm not sure that ntoh and hton are relevant in IPv6. You don't have a native 128-bit type, do you? According to http://www.mail-archive.com/users@ipv6.org/msg00195.html: IPv6 addresses are expected to be representd in network byte order whenever they are in binary form

问题 I'd like to write a fairly simple client-server network app. I only use a pure IPv4 network, but it would be nice to future-proof my code. I'll probably be using TcpListener/TcpClient, because preliminary investigation of WCF reveals it to be overly complex to set up and hard to grok. For the client side, does .NET provide a facility to automatically decode a string that contains an IPv4 or IPv6 address (where the IPv4 address includes a port number)? Bonus points if it can resolve a domain

问题 My question about Spring boot jar. When running jar on production machine as: java -jar xyz.jar It does not respond to my request. Because it is listening on ipv6. But when I run application as java -jar xyz.jar -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses It responds my requests. Is it the production machine's configuration which cause the application to listen over ipv6, or is there any other reasons? Fortunately -Djava.net.preferIPv4Stack=true -Djava.net

问题 I wonder if there is a way to use python to resolve a hostname that resolves only in ipv6 and/or for a hostname that resolves both in ipv4 and ipv6? socket.gethostbyname() and socket.gethostbyname_ex() does not work for ipv6 resolution. A dummy way to do that is to run actual linux host command and parse the results. Is there any better way to do that? Thanks, 回答1: socket.getaddrinfo supports IPv6. You just need to set family to AF_INET6 . socket.getaddrinfo("example.com", None, socket.AF

问题 How can I convert a String containing the ipv6's machine packet destination to a 16 byte array? I know about getBytes and encodings, but I can't seem to understand which encoding I should use or if I have to convert that String to Hexadecimal or not. String ipv6 = "2001:0DB8:AC10:FE01:0000:0000:0000:0000"; byte[] bytes = ipv6.getBytes(); //must be a 16 byte array An example of what I wanna do, just to exemplify. Obs.: I have to convert the String to a 16 byte array Thanks 回答1: try this

问题 I use autobahn framework to create a websocket server in python. I use the following code url = "ws://0.0.0.0:" + str(server_port) ServerFactory = MyServerFactory factory = ServerFactory(url, debug = True, debugCodePaths = True) factory.protocol = MyServerFactory factory.setProtocolOptions(requireMaskedClientFrames = False, applyMask = True) listenWS(factory) reactor.run() I need to accept connections not only on IP4 but IPv6 as well. In the same code I create a HTTP server using the

问题 I'm developing websites in a Windows 7 machine. When I've installed Firefox I've found some performance issue specially on connecting to the localhost, googling around I've discovered that it's related to the use of IPv6 by the browser to resolve urls. Using about: config and setting network.dns.disableIPv6 to true the problem is gone. Now I've the same issue with Google Chrome, but I can't find a way (if there's a way) to do the same I've done with Firefox. Any suggestions? 回答1: The way

问题 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