45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"path"
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"text/template"
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)
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const pxeUserTplPath = "pxelinux.cfg/tpl"
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const pxeUserPath = "pxelinux.cfg"
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func RegisterUserMAC(ip net.IP, username string) error {
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if tab, err := ARPAnalyze(); err != nil {
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return err
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} else if ent := ARPContainsIP(tab, ip); ent == nil {
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return errors.New(fmt.Sprintf("Unable to find MAC address for given IP (%s)", ip))
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} else {
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return registerUser(fmt.Sprintf("%02X-%02X-%02X-%02X-%02X-%02X-%02X", ent.HWType, ent.HWAddress[0], ent.HWAddress[1], ent.HWAddress[2], ent.HWAddress[3], ent.HWAddress[4], ent.HWAddress[5]), username)
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}
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}
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func RegisterUserIP(ip net.IP, username string) error {
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return registerUser(fmt.Sprintf("%02X%02X%02X%02X", ip.To4()[0], ip.To4()[1], ip.To4()[2], ip.To4()[3]), username)
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}
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func registerUser(filename string, username string) error {
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if pxeTplCnt, err := ioutil.ReadFile(path.Join(tftpDir, pxeUserTplPath)); err != nil {
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return err
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} else if userfd, err := os.OpenFile(path.Join(tftpDir, pxeUserPath, filename), os.O_RDWR|os.O_CREATE, 0644); err != nil {
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return err
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} else {
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defer userfd.Close()
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if pxeTmpl, err := template.New("pxeUser").Parse(string(pxeTplCnt)); err != nil {
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return err
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} else if err := pxeTmpl.Execute(userfd, map[string]string{"username": username}); err != nil {
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return err
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}
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}
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return nil
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}
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