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| package sockaddr
|
| import (
| "errors"
| "os/exec"
| )
|
| type routeInfo struct {
| cmds map[string][]string
| }
|
| // NewRouteInfo returns a Linux-specific implementation of the RouteInfo
| // interface.
| func NewRouteInfo() (routeInfo, error) {
| // CoreOS Container Linux moved ip to /usr/bin/ip, so look it up on
| // $PATH and fallback to /sbin/ip on error.
| path, _ := exec.LookPath("ip")
| if path == "" {
| path = "/sbin/ip"
| }
|
| return routeInfo{
| cmds: map[string][]string{"ip": {path, "route"}},
| }, nil
| }
|
| // GetDefaultInterfaceName returns the interface name attached to the default
| // route on the default interface.
| func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
| out, err := exec.Command(ri.cmds["ip"][0], ri.cmds["ip"][1:]...).Output()
| if err != nil {
| return "", err
| }
|
| var ifName string
| if ifName, err = parseDefaultIfNameFromIPCmd(string(out)); err != nil {
| return "", errors.New("No default interface found")
| }
| return ifName, nil
| }
|
|
