Go 如何从本地接口获取所有地址和掩码

net.InterfaceAddrnet.IPAddr

package main

import (
    "fmt"
    "net"
)

func localAddresses() {
    ifaces, err := net.Interfaces()
    if err != nil {
        fmt.Print(fmt.Errorf("localAddresses: %+v\n", err.Error()))
        return
    }
    for _, i := range ifaces {
        addrs, err := i.Addrs()
        if err != nil {
            fmt.Print(fmt.Errorf("localAddresses: %+v\n", err.Error()))
            continue
        }
        for _, a := range addrs {
            switch v := a.(type) {
            case *net.IPAddr:
                fmt.Printf("%v : %s (%s)\n", i.Name, v, v.IP.DefaultMask())
            }

        }
    }
}

func main() {
    localAddresses()
}

Edit个

netnet

package main

import (
    "fmt"
    "net"
    "os"
    "syscall"
    "unsafe"
)

func getAdapterList() (*syscall.IpAdapterInfo, error) {
    b := make([]byte, 1000)
    l := uint32(len(b))
    a := (*syscall.IpAdapterInfo)(unsafe.Pointer(&b[0]))
    // TODO(mikio): GetAdaptersInfo returns IP_ADAPTER_INFO that
    // contains IPv4 address list only. We should use another API
    // for fetching IPv6 stuff from the kernel.
    err := syscall.GetAdaptersInfo(a, &l)
    if err == syscall.ERROR_BUFFER_OVERFLOW {
        b = make([]byte, l)
        a = (*syscall.IpAdapterInfo)(unsafe.Pointer(&b[0]))
        err = syscall.GetAdaptersInfo(a, &l)
    }
    if err != nil {
        return nil, os.NewSyscallError("GetAdaptersInfo", err)
    }
    return a, nil
}

func localAddresses() error {
    ifaces, err := net.Interfaces()
    if err != nil {
        return err
    }

    aList, err := getAdapterList()
    if err != nil {
        return err
    }

    for _, ifi := range ifaces {
        for ai := aList; ai != nil; ai = ai.Next {
            index := ai.Index

            if ifi.Index == int(index) {
                ipl := &ai.IpAddressList
                for ; ipl != nil; ipl = ipl.Next {

                    fmt.Printf("%s: %s (%s)\n", ifi.Name, ipl.IpAddress, ipl.IpMask)
                }
            }
        }
    }
    return err
}

func main() {
    err := localAddresses()
    if err != nil {
        panic(err)
    }
}

Some code shamelessly borrowed from interface_windows.go. Even comments are left intact