diff options
Diffstat (limited to 'dhcpv4/bsdp/bsdp.go')
| -rw-r--r-- | dhcpv4/bsdp/bsdp.go | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/dhcpv4/bsdp/bsdp.go b/dhcpv4/bsdp/bsdp.go index 42edf7f..bf84508 100644 --- a/dhcpv4/bsdp/bsdp.go +++ b/dhcpv4/bsdp/bsdp.go @@ -37,6 +37,28 @@ func needsReplyPort(replyPort uint16) bool { return replyPort != 0 && replyPort != dhcpv4.ClientPort } +// NewInformListForInterface creates a new INFORM packet for interface ifname +// with configuration options specified by config. +func NewInformListForInterface(ifname string, replyPort uint16) (*dhcpv4.DHCPv4, error) { + iface, err := net.InterfaceByName(ifname) + if err != nil { + return nil, err + } + // Get currently configured IP. + addrs, err := iface.Addrs() + if err != nil { + return nil, err + } + localIPs, err := dhcpv4.GetExternalIPv4Addrs(addrs) + if err != nil { + return nil, fmt.Errorf("could not get local IPv4 addr for %s: %v", iface.Name, err) + } + if localIPs == nil || len(localIPs) == 0 { + return nil, fmt.Errorf("could not get local IPv4 addr for %s", iface.Name) + } + return NewInformList(iface.HardwareAddr, localIPs[0], replyPort) +} + // NewInformList creates a new INFORM packet for interface with hardware address // `hwaddr` and IP `localIP`. Packet will be sent out on port `replyPort`. func NewInformList(hwaddr net.HardwareAddr, localIP net.IP, replyPort uint16) (*dhcpv4.DHCPv4, error) { |