golang ip2long long2ip_golang long2ip-优快云博客

本文链接：https://blog.youkuaiyun.com/zengming00/article/details/80354248

这段代码展示了如何在Go中将IPv4地址转换为32位无符号整数（ip2long）以及将整数转换回IPv4地址（long2ip）。iptest函数遍历一个IP地址到整数的映射，验证转换的正确性。

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  func 
  iptest() { 
 
  var 
  m = 
  map[ 
  string] 
  uint32{ 
 
  "217.171.224.66": 
  3651919938, 
 
  "80.101.64.8": 
  1348812808, 
 
  "188.204.155.170": 
  3167525802, 
 
  "74.86.158.107": 
  1247190635, 
 
  "83.83.140.49": 
  1397984305, 
 
  "195.73.215.250": 
  3276396538, 
 
  "37.74.94.85": 
  625630805, 
 
  "62.195.45.68": 
  1052978500, 
 
  "82.169.113.78": 
  1386836302, 
 
  "145.53.147.68": 
  2436207428, 
 
       } 
 
  for 
  k, 
  v := 
  range m { 
 
  ip := net. 
  ParseIP(k) 
 
  if ip == 
  nil { 
 
               fmt. 
  Println( 
  "parseip fail:", k, v) 
 
  continue 
 
           } 
 
  if 
  r := 
  ip2long(ip); r != v { 
 
               fmt. 
  Println( 
  "ip2long fail:", r, v) 
 
           } 
 
  if 
  r := 
  long2ip(v). 
  String(); r != k { 
 
               fmt. 
  Println( 
  "long2ip fail:", r, v) 
 
           } 
 
       } 
 
   } 
 
  func 
  ip2long(ip net.IP) 
  uint32 { 
 
  a := 
  uint32(ip[ 
  12]) 
 
  b := 
  uint32(ip[ 
  13]) 
 
  c := 
  uint32(ip[ 
  14]) 
 
  d := 
  uint32(ip[ 
  15]) 
 
  return 
  uint32(a<< 
  24 | b<< 
  16 | c<< 
  8 | d) 
 
   } 
 
  func 
  long2ip(ip 
  uint32) net.IP { 
 
  a := 
  byte((ip >> 
  24) & 
  0xFF) 
 
  b := 
  byte((ip >> 
  16) & 
  0xFF) 
 
  c := 
  byte((ip >> 
  8) & 
  0xFF) 
 
  d := 
  byte(ip & 
  0xFF) 
 
  return net. 
  IPv4(a, b, c, d) 
 
   }