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Update comment why filter_conn.go is needed.

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This commit is contained in:
Eugene Bujak 2018-12-29 16:40:38 +03:00
parent bf15a40248
commit fedfc3a1fd
1 changed files with 4 additions and 2 deletions
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6
dhcpd/filter_conn.go
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@ -7,13 +7,15 @@ import (
"golang.org/x/net/ipv4" "golang.org/x/net/ipv4"
) )
// filterConn listens to 0.0.0.0:67, but accepts packets only from specific interface
// This is neccessary for DHCP daemon to work, since binding to IP address doesn't
// us access to see Discover/Request packets from clients.
//
// TODO: on windows, controlmessage does not work, try to find out another way // TODO: on windows, controlmessage does not work, try to find out another way
// https://github.com/golang/net/blob/master/ipv4/payload.go#L13 // https://github.com/golang/net/blob/master/ipv4/payload.go#L13
type filterConn struct { type filterConn struct {
iface net.Interface iface net.Interface
conn *ipv4.PacketConn conn *ipv4.PacketConn
// cm *ipv4.ControlMessage
} }
func newFilterConn(iface net.Interface, address string) (*filterConn, error) { func newFilterConn(iface net.Interface, address string) (*filterConn, error) {