[yang][dhcp_server] Add dhcp_server_ipv4 yang model

src/sonic-yang-models/doc/Configuration.md

@@ -29,6 +29,7 @@ Table of Contents
          * [Device Metadata](#device-metadata)
          * [Device neighbor metada](#device-neighbor-metada)
          * [DHCP_RELAY](#dhcp_relay)
+         * [DHCP Server IPV4](#dhcp_server_ipv4)
          * [DSCP_TO_TC_MAP](#dscp_to_tc_map)
          * [FG_NHG](#fg_nhg)
          * [FG_NHG_MEMBER](#fg_nhg_member)
@@ -986,6 +987,50 @@ instance is supported in SONiC.
 
 ```
 
+### DHCP_SERVER_IPV4
+IPV4 DHPC Server related configuration are defined in **DHCP_SERVER_IPV4**, **DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS**, **DHCP_SERVER_IPV4_RANGE**, **DHCP_SERVER_IPV4_PORT** tables.
+```
+{
+    "DHCP_SERVER_IPV4": {
+        "Vlan100": {
+            "gateway": "100.1.1.1",
+            "lease_time": 3600,
+            "mode": "PORT",
+            "netmask": "255.255.255.0",
+            "customized_options": [
+                "option60"
+            ],
+            "state": "enabled"
+        }
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS": {
+        "option60": {
+            "id": 60,
+            "type": "text",
+            "value": "dummy_value"
+        }
+    },
+    "DHCP_SERVER_IPV4_RANGE": {
+        "range1": {
+            "ip_start": "100.1.1.3",
+            "ip_end": "100.1.1.5"
+        }
+    },
+    "DHCP_SERVER_IPV4_PORT": {
+        "Vlan100|PortChannel0003": {
+            "ips": [
+                "100.1.1.10"
+            ]
+        },
+        "Vlan100|PortChannel2": {
+            "ranges": [
+                "range1"
+            ]
+        }
+    }
+}
+```
+
 ### DSCP_TO_TC_MAP
 ```
 {

src/sonic-yang-models/setup.py

@@ -178,6 +178,7 @@ def run(self):
                          './yang-models/sonic-dscp-fc-map.yang',
                          './yang-models/sonic-exp-fc-map.yang',
                          './yang-models/sonic-dscp-tc-map.yang',
+                         './yang-models/sonic-dhcp-server-ipv4.yang',
                          './yang-models/sonic-dot1p-tc-map.yang',
                          './yang-models/sonic-storm-control.yang',
                          './yang-models/sonic-tc-priority-group-map.yang',

src/sonic-yang-models/tests/files/sample_config_db.json

@@ -1880,6 +1880,45 @@
                 "interface_id": "true"
             }
         },
+        "DHCP_SERVER_IPV4": {
+            "Vlan100": {
+                "gateway": "100.1.1.1",
+                "lease_time": "3600",
+                "mode": "PORT",
+                "netmask": "255.255.255.0",
+                "customized_options": [
+                    "option60"
+                ],
+                "state": "enabled"
+            }
+        },
+        "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS": {
+            "option60": {
+                "id": "60",
+                "type": "text",
+                "value": "dummy_value"
+            }
+        },
+        "DHCP_SERVER_IPV4_RANGE": {
+            "range1": {
+                "range": [
+                    "100.1.1.3",
+                    "100.1.1.5"
+                ]
+            }
+        },
+        "DHCP_SERVER_IPV4_PORT": {
+            "Vlan100|Ethernet0": {
+                "ips": [
+                    "100.1.1.10"
+                ]
+            },
+            "Vlan100|Ethernet1": {
+                "ranges": [
+                    "range1"
+                ]
+            }
+        },
         "SCHEDULER": {
             "TEST@0": {
                 "cbs": "256",

src/sonic-yang-models/tests/yang_model_tests/tests/dhcp_server_ipv4.json

@@ -0,0 +1,96 @@
+{
+    "DHCP_SERVER_IPV4_VALID_FORMAT": {
+        "desc": "Add dhcp_server_ipv4 in correct format."
+    },
+    "DHCP_SERVER_IPV4_WITH_NON_EXIST_VLAN": {
+        "desc": "Configure vlan-id in DHCP_SERVER_IPV4 table which does not exist in VLAN table.",
+        "eStrKey": "LeafRef"
+    },
+    "DHCP_SERVER_IPV4_INCORRECT_GATEWAY": {
+        "desc": "Add gateway which is not in correct ip-prefix format.",
+        "eStrKey": "Pattern"
+    },
+    "DHCP_SERVER_IPV4_INCORRECT_NETMASK": {
+        "desc": "Add netmask which is not in correct ip-prefix format.",
+        "eStrKey": "Pattern"
+    },
+    "DHCP_SERVER_IPV4_STATE_WRONG_VALUE": {
+        "desc": "Configure wrong value for state.",
+        "eStrKey": "InvalidValue"
+    },
+    "DHCP_SERVER_IPV4_MODE_WRONG_VALUE": {
+        "desc": "Configure wrong value for mode.",
+        "eStrKey": "InvalidValue"
+    },
+    "DHCP_SREVER_IPV4_NON_EXIST_OPTION": {
+        "desc": "Configure option in DHCP_SERVER_IPV4 table which does not exist in DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS table.",
+        "eStrKey": "LeafRef"
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_WRONG_VALUE": {
+        "desc": "Configure wrong value for type.",
+        "eStrKey": "InvalidValue",
+        "eStr": ["type"]
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_VALID_VALUE_TEXT": {
+        "desc": "Add text type of DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS."
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_VALID_VALUE_IPV4_ADDRESS": {
+        "desc": "Add ipv4-address type of DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS."
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_VALID_VALUE_UINT8": {
+        "desc": "Add uint8 type of DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS."
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_VALID_VALUE_UINT16": {
+        "desc": "Add uint16 type of DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS."
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_TYPE_VALID_VALUE_UINT32": {
+        "desc": "Add uint32 type of DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS."
+    },
+    "DHCP_SERVER_IPV4_RANGE_INVALID_END": {
+        "desc": "Configure wrong end ip of range.",
+        "eStrKey": "Pattern"
+    },
+    "DHCP_SERVER_IPV4_RANGE_RANGES_WITH_IP": {
+        "desc": "Configure both ip and ranges in DHCP_SERVER_IPV4_RANGE_RANGES",
+        "eStr": ["Statement of 'ips' and 'ranges' cannot both exist"]
+    },
+    "DHCP_SERVER_IPV4_GATEWAY_ABSENT": {
+        "desc": "Missing gateway in DHCP_SERVER_IPV4",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_LEASE_TIME_ABSENT": {
+        "desc": "Missing lease_time in DHCP_SERVER_IPV4",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_MODE_ABSENT": {
+        "desc": "Missing mode in DHCP_SERVER_IPV4",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_NETMASK_ABSENT": {
+        "desc": "Missing netmask in DHCP_SERVER_IPV4",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_STATE_ABSENT": {
+        "desc": "Missing state in DHCP_SERVER_IPV4",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_ID_ABSENT": {
+        "desc": "Missing id in DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS_VALUE_ABSENT": {
+        "desc": "Missing value in DHCP_SERVER_IPV4_CUSTOMIZED_OPTIONS",
+        "eStrKey" : "Mandatory"
+    },
+    "DHCP_SERVER_IPV4_RANGE_RANGE_ABSENT": {
+        "desc": "Missing ranges in DHCP_SERVER_IPV4_RANGE",
+        "eStrKey": "Must"
+    },
+    "DHCP_SERVER_IPV4_RANGE_SINGLE_IP": {
+        "desc": "Single ip in DHCP_SERVER_IPV4_RANGE"
+    },
+    "DHCP_SERVER_IPV4_RANGE_THREE_IP": {
+        "desc": "Three ips in DHCP_SERVER_IPV4_RANGE",
+        "eStrKey": "Must"
+    }
+}