ipv6

Calculating checksum of ICMPv6 Packet in C

由 爱⌒轻易说出口 提交于 2019-12-11 13:38:31
问题 I am trying to calculate the checksum of an ICMPv6 message (to be precise, a Neighbor Advertisement). RFC 4443 describes it as the "16-bit one's complement of the one's complement sum of the entire ICMPv6 message" There is also some example code on how to do that (although I think it's from IPv4, but the only difference is what is included in the sum, not how to calculate it): RFC 1071 I have taken a packet from wireshark and entered the shorts in host byte order. Then I print the correct

Determine country from IP - IPv6

由 北战南征 提交于 2019-12-11 12:26:28
问题 In my project, I have a function in postgres (plpgsql) that determines country from a given ip address: CREATE OR REPLACE FUNCTION get_country_for_ip(character varying) RETURNS character varying AS $BODY$ declare ip ALIAS for $1; ccode varchar; cparts varchar[]; nparts bigint[]; addr bigint; begin cparts := string_to_array(ip, '.'); if array_upper(cparts, 1) <> 4 then raise exception 'gcfi01: Invalid IP address: %', ip; end if; nparts := array[a2i(cparts[1])::bigint, a2i(cparts[2])::bigint,

How to parse ipv6 address into “octets”?

由 ￡可爱￡侵袭症＋ 提交于 2019-12-11 11:40:06
问题 I want to be able to parse ipv6 address into octets. Is there something similar to the following? IPAddress.Parse(address).GetAddressBytes()[0]; IPAddress.Parse(address).GetAddressBytes()[1]; 回答1: You mean like this? IPAddress ipv6Addr = IPAddress.Parse("FE80::0202:B3FF:FE1E:8329") ; byte[] octets = ipv6Addr.GetAddressBytes() ; string text = String.Join( "," , octets.Select( x => string.Format("0x{0:X2}", x ) ) ) ; Console.WriteLine(text); The above snippet writes this to the console: 0xFE

Android emulator access to IPv6 possible? Network is unreachable

由 烈酒焚心 提交于 2019-12-11 11:10:18
问题 I am running an Android 4.0 emulator on windows 7 with a valid global ipv6 address. The emulator can access the ipv4 of the host machine addresses but not the ipv6 address. Pinging the ipv6 address from a third party site works. Is there some magic trick to tell the emulator to use IPv6 as well? The emulator hasn't really got a lot of configuration options. I always get the message "Network is unreachable". 回答1: Starting from SDK 25.3.0 running Android Emulator in IPv6-only environment is

zabbix 监控 ipv6

由 时光毁灭记忆、已成空白 提交于 2019-12-11 10:28:37
zabbix 简单监控ipv6地址的连通性，参照Template ICMP Ping模板 0、准备工作 0-1、服务器已有ipv6地址，ipv6涉及配置文件（部分可不管）： /usr/share/oem/grub.cfg /etc/modprobe* /etc/sysconfig/network /etc/sysctl.conf /etc/sysctl.conf.first /etc/ssh/sshd_config /etc/sysconfig/network-scripts/ifcfg-$ifcfg /etc/sysconfig/network-scripts/route6-$ifcfg # ip -6 route add default dev "$ifcfg" modprobe ipv6 && lsmod | grep ipv6 ip6tables ... 0-2、zabbix server端编译（建议不开ipv6也可加上）： ./configure --prefix=/usr/local/zabbix/ --enable-server --enable-agent --with-mysql --with-net-snmp --with-libcurl --with-libxml2 --enable-ipv6 make; make install #

Revert number to IPv6 string representation

由 孤街浪徒 提交于 2019-12-11 10:19:00
问题 I'm using the IP2Location database to find country codes for IPv6 addresses. They have a method to convert an IPv6 address to a (large) number which can be used to query their database. $ipv6 = '2404:6800:4001:805::1006'; $int = inet_pton($ipv6); $bits = 15; $ipv6long = 0; while($bits >= 0){ $bin = sprintf("%08b", (ord($int[$bits]))); if($ipv6long){ $ipv6long = $bin . $ipv6long; } else{ $ipv6long = $bin; } $bits--; } $ipv6long = gmp_strval(gmp_init($ipv6long, 2), 10); In this case, $ipv6long

Dns.GetHostAddresses() only returns IPv6 addresses . How to get Local IPv4?

由 不羁的心 提交于 2019-12-11 07:45:18
问题 According to Dotnet reference , Dns.GetHostAddresses("") should return IPv4 addresses . However I am getting only IPv6 on my windows 7 machine. I tried the program on a different windows 7 still the same result. It only returned IPv4 correctly on an XP machine. If I try , Dns.GetHostEntry(""); It now correctly returns one IPv4 and one IPv6 . How do I get IPv4 from GetHostAddresses() because I don't want to use GetHostEntry(). It looks up the DNS. Also, say for a computer with 1 Network card,

IPV6 ServerSocket is still listening even after application crash

由 北城以北 提交于 2019-12-11 06:58:30
问题 I created a ServerSocket using: InetSocketAddress inetsktaddr = new InetSocketAddress(0); ServerSocket sckt = new ServerSocket(); sckt.bind(inetsktaddr); Socket socket = sckt.accept(); when the application is running, using netstat i found, TCP 0.0.0.0:49906 0.0.0.0:0 LISTENING 9196 TCP [::]:49906 [::]:0 LISTENING 9196 SOMETIMES WHEN THE APPLICATION CRASHES, netstat result says: TCP [::]:49906 [::]:0 LISTENING 9196 when searched for the process id 9196, no such process exists. It was the java

node.js+express+socket.io with ipv6?

由 久未见 提交于 2019-12-11 05:33:43
问题 I have my code like below: var gzippo = require('gzippo'); var app = require('express').createServer() , io = require('socket.io').listen(app); io.enable('browser client gzip'); io.set('transports', [ 'websocket' ]); app.use(gzippo.staticGzip(__dirname + '/')); app.listen(8001); app.get('/', function (req, res) { res.sendfile(__dirname + '/main2.html'); }); io.sockets.on('connection', function (socket) {...}); I use gzippo for gzip, express for http server, socket.io for websocket function.
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