dhcp: Log Vendor Client Identifier (dhcp option 60)

* Log vendor client identifier (dhcp option 60) if extended dhcp
logging is turned on. This required the `vendor_client_identifier` to
be added to the json schema. Validation done using an SV Test
* Added `requested_ip` to the json schema as well, since it was
missed. My SV test failed without it.

Feature #4587

etc/schema.json

@@ -560,12 +560,18 @@
                 "renewal_time": {
                     "type": "integer"
                 },
+                "requested_ip":{
+                    "type": "string"
+                },
                 "subnet_mask": {
                     "type": "string"
                 },
                 "type": {
                     "type": "string"
                 },
+                "vendor_class_identifier":{
+                    "type": "string"
+                },
                 "dns_servers": {
                     "type": "array",
                     "minItems": 1,

rust/src/dhcp/dhcp.rs

@@ -42,6 +42,7 @@ pub const DHCP_OPT_TYPE: u8 = 53;
 pub const DHCP_OPT_PARAMETER_LIST: u8 = 55;
 pub const DHCP_OPT_RENEWAL_TIME: u8 = 58;
 pub const DHCP_OPT_REBINDING_TIME: u8 = 59;
+pub const DHCP_OPT_VENDOR_CLASS_ID: u8 = 60;
 pub const DHCP_OPT_CLIENT_ID: u8 = 61;
 pub const DHCP_OPT_END: u8 = 255;
 

rust/src/dhcp/logger.rs

@@ -168,6 +168,12 @@ impl DHCPLogger {
                                 self.log_opt_routers(js, option)?;
                             }
                         }
+                        DHCP_OPT_VENDOR_CLASS_ID => {
+                            if self.extended && !option.data.is_empty(){
+                                js.set_string_from_bytes("vendor_class_identifier",
+                                                         &option.data)?;
+                            }
+                        }
                         _ => {}
                     }
                 }