Store MAC as lowercase

Signed-off-by: Jason DeTiberus <[email protected]>

grpc-server/hardware.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/pkg/errors"
@@ -38,6 +39,9 @@ func (s *server) Push(ctx context.Context, in *hardware.PushRequest) (*hardware.
 		return &hardware.Empty{}, err
 	}
 
+	// normalize data prior to storing in the database
+	s.normalizeHardwareData(hw)
+
 	// validate the hardware data to avoid duplicate mac address
 	err := s.validateHardwareData(ctx, hw)
 	if err != nil {
@@ -316,3 +320,14 @@ func (s *server) validateHardwareData(ctx context.Context, hw *hardware.Hardware
 	}
 	return nil
 }
+
+func (s *server) normalizeHardwareData(hw *hardware.Hardware) {
+	// Ensure MAC is stored as lowercase
+	if hw != nil && hw.Network != nil {
+		for i := range hw.Network.Interfaces {
+			if hw.Network.Interfaces[i].Dhcp != nil {
+				hw.Network.Interfaces[i].Dhcp.Mac = strings.ToLower(hw.Network.Interfaces[i].Dhcp.Mac)
+			}
+		}
+	}
+}