ipv6

问题 As we know double can store number from ±4.94065645841246544e-324 to ±1.79769313486231570e+308 . Can we store 128 bits value like IPv6 in double and retrieve as it is? For example, to store IPv4 we can use a 32 bit integer and store them as 8 bits partition. And we can retrieve them by using bit masking. There is no standard container to store 128 bit in any language AFAIK. I know double can store 64 bits safely without any precision error but is there any hack? 回答1: Technically you could, if

问题 I want to efficiently search IPv6 subnet range using redis . i thought of storing the IPv6 numeric addresses in redis and search them by range. those are 128-bit ints , e.g: import ipaddress int(ipaddress.ip_address(u'113f:a:2:3:4:1::77')) > 22923991422715307029586104612626104439L and query by range: ZRANGEBYSCORE numerics <subnet-S-start> <subnet-S-end> HOWEVER , redis sorted-sets can hold score of up to 2^53, so all my large ints are being trimmed and I'm losing precision. Is there a way to

问题 I'm trying to to get IPv6 addresses from a hostname on an Android device. My device is Nexus 7 and 6.0.1 version. Below is the API I used: InetAddress[] inets = InetAddress.getAllByName("hostname.com"); InetAddress address = InetAddress.getByName("hostname.com"); Those two API calls work fine for IPv4, but do not work for IPv6. It shows the below errors: 01-10 10:04:18.945: W/System.err(474): java.net.UnknownHostException: Unable to resolve host "106.bmc.com: No address associated with

问题 I need to send a UDPv6 datagram being able to track this message by a local receiver (or via tcpdump ). daddr, err = net.ResolveUDPAddr("udp6", "[address]:port") if err != nil { return err } conn, err := net.DialUDP("udp6", nil, daddr) if err != nil { return err } defer conn.Close() conn.Write(...) Unlike IPv4 this code doesn't work with IPv6. For example, when I try to send a datagram to a multicast address, e.g. to [FF01::DB8:0:0]:5000, I get connect: invalid argument . The same happens

问题 I am seeing the error while converting BigInteger to InetAddress. This happens only with a particular IP "fc00::". Here is my test code. Please let me know if I am missing something. public class IPv6Test { public static BigInteger ipv6ToNumber(InetAddress Inet6Address) { return new BigInteger(1,Inet6Address.getAddress()); } public static void main(String[] args) throws UnknownHostException { InetAddress iaStart = InetAddress.getByName("fc00::"); BigInteger biStart = ipv6ToNumber(iaStart);

问题 I am using this code for check internet connection. What change I have to made for suppourt in IPV6. Please help any help would be appreciate. public enum ReachabilityType { case WWAN, WiFi, NotConnected } public class Reachability: NSObject { class func isConnectedToNetwork() -> Bool { var zeroAddress = sockaddr_in() zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress)) zeroAddress.sin_family = sa_family_t(AF_INET) let defaultRouteReachability = withUnsafePointer(&zeroAddress) {

问题 Apple's iOS App Store review process now includes a requirement that apps should work on IPv6 only networks. With that in mind, is Apple defaulting to IPv6-only, on an app-by-app basis, for iPhones connected over mobile networks in the real world (not just in review)? I.e. is Apple now forcing the move to IPv6-only in the real world for apps that pass it's IPv6 review? (Any answer to the above question(s) would be great by itself, but for those with in-depth knowledge, a follow-up: Would UDP

问题 I have been trying to find a simple client ipv6 script that would work with Evens server script , of course I dont know what Im doing, so all I can do is rewrite someone else's work until I know what Im doing ... so here is a server script that works on Microsoft widows server use IO::Socket::IP -register; my $sock = IO::Socket->new( Domain => PF_INET6, LocalHost => "::1", Listen => 1, ) or die "Cannot create socket - $@\n"; print "Created a socket of type " . ref($sock) . "\n"; { $in =

问题 I am currently configuring a software to be able to handle IPv6 addresses, I have also configure the Nginx docker image so that it can handle both IPv4 and IPv6 address. The problem that I encounter is that I am not sure if the host machine where the software is going to be deployed has IPv6 enabled or not. The issue is that whenever the IPv6 is not enabled in the host machine it is causing the error below. nginx: [emerg] socket() [::]:8080 failed (97: Address family not supported by protocol

问题 Node.js server is deployed on Google Cloud Platform and the server is not listening on ipv6. When I run my API in a mobile browser(chrome) I am seeing this error: This site can't provide a secure connection. ERR_SSL_PROTOCOL_ERROR How to make node.js server run on ipv6? Following is my code: const app = express(); const port = 8080; const privateKey = fs.readFileSync( '/path/to/privkey.pem', 'utf8' ); const certificate = fs.readFileSync( '/path/to/cert.pem', 'utf8' ); const ca = fs