1 files changed, 50 insertions, 0 deletions
diff --git a/lib/xdsconfig/builderconfig.go b/lib/xdsconfig/builderconfig.go
new file mode 100644
index 0000000..c64fe9c
--- /dev/null
+++ b/lib/xdsconfig/builderconfig.go
@@ -0,0 +1,50 @@
+package xdsconfig
+
+import (
+	"errors"
+	"net"
+)
+
+// BuilderConfig represents the builder container configuration
+type BuilderConfig struct {
+	IP          string `json:"ip"`
+	Port        string `json:"port"`
+	SyncThingID string `json:"syncThingID"`
+}
+
+// NewBuilderConfig creates a new BuilderConfig instance
+func NewBuilderConfig(stID string) (BuilderConfig, error) {
+	// Do we really need it ? may be not accessible from client side
+	ip, err := getLocalIP()
+	if err != nil {
+		return BuilderConfig{}, err
+	}
+
+	b := BuilderConfig{
+		IP:          ip, // TODO currently not used
+		Port:        "", // TODO currently not used
+		SyncThingID: stID,
+	}
+	return b, nil
+}
+
+// Copy makes a real copy of BuilderConfig
+func (c *BuilderConfig) Copy(n BuilderConfig) {
+	// TODO
+}
+
+func getLocalIP() (string, error) {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return "", err
+	}
+	for _, address := range addrs {
+		// check the address type and if it is not a loopback the display it
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String(), nil
+			}
+		}
+	}
+	return "", errors.New("Cannot determined local IP")
+}