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packet: handle "any" interface option

This commit is contained in:
Johannes Kimmel 2023-03-07 01:09:52 +01:00
parent cbf92bec2e
commit 20a248af16
1 changed files with 11 additions and 1 deletions
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12
packet/packet.go
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@ -25,6 +25,16 @@ func Listen(group string, port uint16, ifaces ...string) (Conn, error) {
if err != nil {
return Conn{}, err
}
if len(ifaces) == 1 && ifaces[0] == "any" {
netifs, err := net.Interfaces()
if err != nil {
return Conn{}, err
}
ifaces = make([]string, 0, len(netifs))
for _, netif := range netifs {
ifaces = append(ifaces, netif.Name)
}
}
for _, iface := range ifaces {
if err = conn.JoinGroup(iface, group); err != nil {
conn.Close()
@ -65,7 +75,7 @@ func (c Conn) Close() error {
func (c Conn) JoinGroup(ifname string, addr string) error {
ifi, err := net.InterfaceByName(ifname)
if err != nil {
return err
return fmt.Errorf("InterfaceByName(%s): %w", ifname, err)
}
ip, err := netaddr.ParseIP(addr)