'Golang: net.ParseIP()

some perfectly valid IPv6 addresses are considered IPv4 by net.ParseIP(), e.g. 0000:0000:0000:0000:0000:ffff:0100:0000 / ::ffff:0100:0. (please see https://play.golang.org/p/57jAJVSIrHF for a simple example)

What would be the most idiomatic way to deal with this situation? The net package does not export most of the functionality, so rewriting net.Parse would result in a lot of code duplication.

Thank you in advance for your help!

best regards,

Stefan

go ipv6

Solution 1:^[1]

The IPAddress Go library provides more fine-grained control over such addresses. Disclaimer: I am the project manager.

addrStr := ipaddr.NewIPAddressString("::ffff:0100:0")
addr := addrStr.GetAddress()
converter := ipaddr.DefaultAddressConverter{}
var ipv4Addr *ipaddr.IPv4Address
if converter.IsIPv4Convertible(addr) {
    ipv4Addr = converter.ToIPv4(addr)
}
fmt.Printf("original IPv4-mapped IPv6 address is %v, IPv4 address is %v",
    addr, ipv4Addr)

Output:

original IPv4-mapped IPv6 address is ::ffff:100:0, IPv4 address is 1.0.0.0

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Sean F

'Golang: net.ParseIP()

Solution 1:[1]

Sources

Related Questions

Solution 1:^[1]