我在一个环境中有很多电脑还没有
妥善盘点基本上没有人知道哪个IP是哪个
mac地址和哪个主机名.所以我写了以下内容:
妥善盘点基本上没有人知道哪个IP是哪个
mac地址和哪个主机名.所以我写了以下内容:
# This script goes down the entire IP range and attempts to # retrieve the Hostname and mac address and outputs them # into a file. Yay! require "socket" TwoOctets = "10.26" def computer_exists?(computerip) system("ping -c 1 -W 1 #{computerip}") end def append_to_file(line) file = File.open("output.txt","a") file.puts(line) file.close end def getInfo(current_ip) begin if computer_exists?(current_ip) arp_output = `arp -v #{current_ip}` mac_addr = arp_output.to_s.match(/..:..:..:..:..:../) host_name = Socket.gethostbyname(current_ip) append_to_file("#{host_name[0]} - #{current_ip} - #{mac_addr}\n") end rescue SocketError => mySocketError append_to_file("unknown - #{current_ip} - #{mac_addr}") end end (6..8).each do |i| case i when 6 for j in (1..190) current_ip = "#{TwoOctets}.#{i}.#{j}" getInfo(current_ip) end when 7 for j in (1..255) current_ip = "#{TwoOctets}.#{i}.#{j}" getInfo(current_ip) end when 8 for j in (1..52) current_ip = "#{TwoOctets}.#{i}.#{j}" getInfo(current_ip) end end end
一切正常,除了没有找到反向DNS.
我得到的示例输出是:
10.26.6.12 - 10.26.6.12 - 00:11:11:9B:13:9F 10.26.6.17 - 10.26.6.17 - 08:00:69:9A:97:C3 10.26.6.18 - 10.26.6.18 - 08:00:69:93:2C:E2
如果我做nslookup 10.26.6.12那么我得到正确的反向DNS所以
这表明我的机器正在看到DNS服务器.
我试过Socket.gethostbyname,gethostbyaddr,但它不工作.
任何指导将不胜感激.
解决方法
我会查看getaddrinfo.如果换行:
host_name = Socket.gethostbyname(current_ip)
有:
host_name = Socket.getaddrinfo(current_ip,Socket::AF_UNSPEC,Socket::SOCK_STREAM,nil,Socket::AI_CANONNAME)[0][1]
getaddrinfo函数返回数组数组.您可以在以下位置阅读更多信息: