Adding support to parse vendor data for cisco firepower (#443)

* Adding support to parse vendor data for cisco firepower

2 files changed, 19 insertions, 0 deletions

diff --git a/dhcpv4/ztpv4/ztp.go b/dhcpv4/ztpv4/ztp.go
index 43bc0e6..09ec790 100644
--- a/dhcpv4/ztpv4/ztp.go
+++ b/dhcpv4/ztpv4/ztp.go
@@ -65,6 +65,15 @@ func parseClassIdentifier(packet *dhcpv4.DHCPv4) (*VendorData, error) {
 
 		vd.VendorName = p[0]
 		return vd, nil
+
+	// Cisco Firepower FPR4100/9300 models use Opt 60 for model info
+	// and Opt 61 contains the serial number
+	case vc == "FPR4100" || vc == "FPR9300":
+		vd.VendorName = iana.EntIDCiscoSystems.String()
+		vd.Model = vc
+		vd.Serial = dhcpv4.GetString(dhcpv4.OptionClientIdentifier, packet.Options)
+		return vd, nil
+
 	}
 
 	return nil, nil
diff --git a/dhcpv4/ztpv4/ztp_test.go b/dhcpv4/ztpv4/ztp_test.go
index d0b002f..a6781a1 100644
--- a/dhcpv4/ztpv4/ztp_test.go
+++ b/dhcpv4/ztpv4/ztp_test.go
@@ -12,6 +12,7 @@ func TestParseClassIdentifier(t *testing.T) {
 	tt := []struct {
 		name         string
 		vc, hostname string
+		ci           []byte // Client Identifier
 		want         *VendorData
 		fail         bool
 	}{
@@ -45,6 +46,12 @@ func TestParseClassIdentifier(t *testing.T) {
 			vc:   "ZPESystems:NSC:001234567",
 			want: &VendorData{VendorName: "ZPESystems", Model: "NSC", Serial: "001234567"},
 		},
+		{
+			name: "cisco",
+			vc:   "FPR4100",
+			ci:   []byte("JMX2525X0BW"),
+			want: &VendorData{VendorName: "Cisco Systems", Model: "FPR4100", Serial: "JMX2525X0BW"},
+		},
 	}
 
 	for _, tc := range tt {
@@ -60,6 +67,9 @@ func TestParseClassIdentifier(t *testing.T) {
 			if tc.hostname != "" {
 				packet.UpdateOption(dhcpv4.OptHostName(tc.hostname))
 			}
+			if tc.ci != nil {
+				packet.UpdateOption(dhcpv4.OptClientIdentifier(tc.ci))
+			}
 
 			vd, err := ParseVendorData(packet)
 			if tc.fail {