Adds support HomeKit cameras!

pkg/homekit/mdns/server.go

@@ -0,0 +1,53 @@
+package mdns
+
+import (
+	"github.com/hashicorp/mdns"
+	"net"
+)
+
+const HostHeaderTail = "._hap._tcp.local"
+
+func NewServer(name string, port int, ips []net.IP, txt []string) (*mdns.Server, error) {
+	if ips == nil || ips[0] == nil {
+		ips = LocalIPs()
+	}
+
+	// important to set hostName manually with any value and `.local.` tail
+	// important to set ips manually
+	service, _ := mdns.NewMDNSService(
+		name, "_hap._tcp", "", name+".local.", port, ips, txt,
+	)
+
+	return mdns.NewServer(&mdns.Config{Zone: service})
+}
+
+func LocalIPs() []net.IP {
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return nil
+	}
+
+	var ips []net.IP
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagUp == 0 {
+			continue // interface down
+		}
+		if iface.Flags&net.FlagLoopback != 0 {
+			continue // loopback interface
+		}
+
+		var addrs []net.Addr
+		if addrs, err = iface.Addrs(); err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			switch addr := addr.(type) {
+			case *net.IPNet:
+				ips = append(ips, addr.IP)
+			case *net.IPAddr:
+				ips = append(ips, addr.IP)
+			}
+		}
+	}
+	return ips
+}