fix(utils): reverse lookup should also work on an ip address input wi…

…th mask

internal/source/vmware/vmware_sync.go

@@ -906,6 +906,10 @@ func (vc *VmwareSource) syncVMInterfaces(nbi *inventory.NetboxInventory, vmwareV
 				return fmt.Errorf("adding VmInterface: %s", err)
 			}
 
+			if netboxVM.Name == "csm-dev.src.si" {
+				print("hello")
+			}
+
 			vmIPv4Addresses, vmIPv6Addresses = vc.addVMInterfaceIPs(nbi, nbVMInterface, nicIPv4Addresses, nicIPv6Addresses, vmIPv4Addresses, vmIPv6Addresses)
 		}
 	}

internal/utils/networking.go

@@ -11,7 +11,17 @@ import (
 // Function that receives ipAddress and performs a reverse lookup
 // to get the hostname. If the reverse lookup fails, it returns an empty string.
 func ReverseLookup(ipAddress string) string {
-	names, err := net.LookupAddr(ipAddress)
+	// Parse the IP address to handle cases where a subnet mask is provided
+	ip, _, err := net.ParseCIDR(ipAddress)
+	if err != nil {
+		// If parsing as CIDR fails, try to parse it as a plain IP address
+		ip = net.ParseIP(ipAddress)
+		if ip == nil {
+			return ""
+		}
+	}
+
+	names, err := net.LookupAddr(ip.String())
 	if err != nil || len(names) == 0 {
 		return ""
 	}

internal/utils/networking_test.go

@@ -21,13 +21,34 @@ func TestReverseLookup(t *testing.T) {
 			},
 			want: "",
 		},
+		{
+			name: "Valid rerse lookup",
+			args: args{
+				ipAddress: "1.1.1.1",
+			},
+			want: "one.one.one.one",
+		},
 		{
 			name: "Valid reverse lookup",
 			args: args{
 				ipAddress: "8.8.8.8",
 			},
 			want: "dns.google",
 		},
+		{
+			name: "Lookup IP with mask",
+			args: args{
+				ipAddress: "8.8.8.8/24",
+			},
+			want: "dns.google",
+		},
+		{
+			name: "Lookup IP with wrong mask should fail",
+			args: args{
+				ipAddress: "8.8.8.8/36",
+			},
+			want: "",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {