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This commit is contained in:
Simon Zolin
2020-04-30 13:28:04 +03:00
parent f5a50e2bc3
commit c47577b015
1 changed files with 29 additions and 23 deletions
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52
dhcpd/dhcpd.go
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@@ -234,39 +234,45 @@ func (s *Server) setConfig(config ServerConfig) error {
return nil
}
// Start will listen on port 67 and serve DHCP requests.
func (s *Server) Start() error {
func (s *Server) start4(iface net.Interface) error {
// TODO: don't close if interface and addresses are the same
if s.conn != nil {
_ = s.closeConn()
}
c, err := newFilterConn(iface, ":67") // it has to be bound to 0.0.0.0:67, otherwise it won't see DHCP discover/request packets
if err != nil {
return wrapErrPrint(err, "Couldn't start listening socket on 0.0.0.0:67")
}
log.Info("DHCP: listening on 0.0.0.0:67")
s.conn = c
s.cond = sync.NewCond(&s.mutex)
s.running = true
go func() {
// operate on c instead of c.conn because c.conn can change over time
err := dhcp4.Serve(c, s)
if err != nil && !s.stopping {
log.Printf("dhcp4.Serve() returned with error: %s", err)
}
_ = c.Close() // in case Serve() exits for other reason than listening socket closure
s.running = false
s.cond.Signal()
}()
return nil
}
// Start will listen on port 67 and serve DHCP requests.
func (s *Server) Start() error {
iface, err := net.InterfaceByName(s.conf.InterfaceName)
if err != nil {
return wrapErrPrint(err, "Couldn't find interface by name %s", s.conf.InterfaceName)
}
if false {
c, err := newFilterConn(*iface, ":67") // it has to be bound to 0.0.0.0:67, otherwise it won't see DHCP discover/request packets
if err != nil {
return wrapErrPrint(err, "Couldn't start listening socket on 0.0.0.0:67")
}
log.Info("DHCP: listening on 0.0.0.0:67")
s.conn = c
s.cond = sync.NewCond(&s.mutex)
s.running = true
go func() {
// operate on c instead of c.conn because c.conn can change over time
err := dhcp4.Serve(c, s)
if err != nil && !s.stopping {
log.Printf("dhcp4.Serve() returned with error: %s", err)
}
_ = c.Close() // in case Serve() exits for other reason than listening socket closure
s.running = false
s.cond.Signal()
}()
err = s.start4(*iface)
if err != nil {
return err
}
err = s.srv6.Start(*iface)