Go语言：IPv6解析转换成BigInt整形以及与IPv4的兼容 |
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IPv6协议文档是RFC4291，128bit(16个字节)，以冒号分隔，允许用双冒号"::"来压缩表示一串连续的0，但"::"只能使用一次。 "0:0:0:0:0:ffff:0:0" -- "0:0:0:0:0:ffff:255.255.255.255" 用于将IPv4映射到IPv6"0:0:0:0:0:0:0.0.0.0"--"0:0:0:0:0:0:255.255.255.255" 能兼容IPv4的IPv6 （这个概念已废弃）相关文章：《Go语言：整形数字字符串转换为IPv6地址字符串》 解析与转换示例： package main import ( "errors" "fmt" "math/big" "net" ) func Ipv6ToInt(ip net.IP) (*big.Int, error) { if ip == nil { return nil, errors.New("invalid ipv6") } IPv6Int := big.NewInt(0) IPv6Int.SetBytes(ip) return IPv6Int, nil } func convert(ipv6 string) { ip := net.ParseIP(ipv6) bi, err := Ipv6ToInt(ip) if err != nil { fmt.Printf("ip=%v err=%v\n", ipv6, err) return } fmt.Printf("parsed=%v number=%v\n", ip, bi) } func main() { fmt.Printf("\n---- IPv6常见例子 ----\n") convert("2c0f:ffa1:0:0:0:0:0:0") convert("2801:0137:ffff:ffff:ffff:ffff:ffff:ffff") convert("2801:0137::ffff:ffff:ffff") convert("::") convert("2801::") convert("::ffff") fmt.Printf("\n---- 非法IPv6 ----\n") //多个"::" convert("2801:0137::ffff:ffff::ffff") //取值超限 convert("2801:0137::ffff:ffff::ffffa1") //少于16个字节 convert("2801:0137:ffff:ffff:ffff") /* 2.5.5.1. IPv4-Compatible IPv6 Address | 80 bits | 16 | 32 bits | +--------------------------------------+--------------------------+ |0000..............................0000|0000| IPv4 address | +--------------------------------------+----+---------------------+ The "IPv4-Compatible IPv6 address" is now deprecated because the current IPv6 transition mechanisms no longer use these addresses. New or updated implementations are not required to support this address type. */ fmt.Printf("\n---- 能兼容IPv4的IPv6 （这个概念已废弃） ----\n") convert("0:0:0:0:0:0:0.0.0.0") convert("0:0:0:0:0:0:255.255.255.255") convert("0:0:0:0:0:0:10.2.3.45") convert("0:0:0:0:0:0:a02:32d") convert("::10.2.3.45") convert("::a02:32d") /* 2.5.5.2. IPv4-Mapped IPv6 Address | 80 bits | 16 | 32 bits | +--------------------------------------+--------------------------+ |0000..............................0000|FFFF| IPv4 address | +--------------------------------------+----+---------------------+ */ fmt.Printf("\n---- IPv4映射成IPv6 ----\n") convert("0:0:0:0:0:ffff:0:0") convert("0:0:0:0:0:ffff:255.255.255.255") convert("10.2.3.45") convert("0000:0000:0000:0000:0000:ffff:10.2.3.45") convert("0000:0000:0000:0000:0000:ffff:a02:32d") convert("0:0:0:0:0:ffff:10.2.3.45") convert("0:0:0:0:0:ffff:a02:32d") convert("::ffff:10.2.3.45") convert("::ffff:a02:32d") }输出： ---- IPv6常见例子 ---- parsed=2c0f:ffa1:: number=58569101037597416794711927206927400960 parsed=2801:137:ffff:ffff:ffff:ffff:ffff:ffff number=53174336847441874194254142093255507967 parsed=2801:137::ffff:ffff:ffff number=53174336768213711679990085974688268287 parsed=:: number=0 parsed=2801:: number=53174312128255169743780812907543003136 parsed=::ffff number=65535 ---- 非法IPv6 ---- ip=2801:0137::ffff:ffff::ffff err=invalid ipv6 ip=2801:0137::ffff:ffff::ffffa1 err=invalid ipv6 ip=2801:0137:ffff:ffff:ffff err=invalid ipv6 ---- 能兼容IPv4的IPv6 （这个概念已废弃） ---- parsed=:: number=0 parsed=::ffff:ffff number=4294967295 parsed=::a02:32d number=167904045 parsed=::a02:32d number=167904045 parsed=::a02:32d number=167904045 parsed=::a02:32d number=167904045 ---- IPv4映射成IPv6 ---- parsed=0.0.0.0 number=281470681743360 parsed=255.255.255.255 number=281474976710655 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405 parsed=10.2.3.45 number=281470849647405
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