[dhcp_server] add show dhcp server port (#17491)

* add show dhcp_server port

dockers/docker-dhcp-server/cli-plugin-tests/mock_config_db.json

@@ -44,5 +44,17 @@
     },
     "DHCP_SERVER_IPV4_IP|eth0": {
         "ip": "240.127.1.2"
+    },
+    "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4": {
+        "ips": "100.1.1.10,10.1.1.11"
+    },
+    "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7": {
+        "ranges": "range1,range2"
+    },
+    "DHCP_SERVER_IPV4_PORT|Vlan200|Ethernet8": {
+        "ranges": "range3,range4"
+    },
+    "DHCP_SERVER_IPV4_PORT|Ethernet9": {
+        "ranges": "range5,range6"
     }
 }

dockers/docker-dhcp-server/cli-plugin-tests/test_show_dhcp_server.py

@@ -175,3 +175,81 @@ option60                60  dummy_value  string
         result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["option"], ["option60"], obj=db)
         assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
         assert result.stdout == expected_stdout
+
+    def test_show_dhcp_server_ipv4_port_without_intf(self, mock_db):
+        expected_stdout = """\
+Interface          Bind
+-----------------  ----------
+Vlan100|Ethernet4  100.1.1.10
+                   10.1.1.11
+Vlan100|Ethernet7  range1
+                   range2
+Vlan200|Ethernet8  range3
+                   range4
+Ethernet9          range5
+                   range6
+"""
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["port"], [], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert result.stdout == expected_stdout
+
+    def test_show_dhcp_server_ipv4_port_with_port(self, mock_db):
+        expected_stdout = """\
+Interface          Bind
+-----------------  ------
+Vlan100|Ethernet7  range1
+                   range2
+"""
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["port"], ["Ethernet7"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert result.stdout == expected_stdout
+
+    def test_show_dhcp_server_ipv4_port_with_vlan(self, mock_db):
+        expected_stdout = """\
+Interface          Bind
+-----------------  ----------
+Vlan100|Ethernet4  100.1.1.10
+                   10.1.1.11
+Vlan100|Ethernet7  range1
+                   range2
+"""
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["port"], ["Vlan100"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert result.stdout == expected_stdout
+
+    def test_show_dhcp_server_ipv4_port_with_port_and_vlan(self, mock_db):
+        expected_stdout = """\
+Interface          Bind
+-----------------  ------
+Vlan200|Ethernet8  range3
+                   range4
+"""
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["port"], ["Vlan200|Ethernet8"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert result.stdout == expected_stdout
+
+    def test_show_dhcp_server_ipv4_port_with_single_port(self, mock_db):
+        expected_stdout = """\
+Interface    Bind
+-----------  ------
+Ethernet9    range5
+             range6
+"""
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(show_dhcp_server.dhcp_server.commands["ipv4"].commands["port"], ["Ethernet9"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert result.stdout == expected_stdout

dockers/docker-dhcp-server/cli/show/plugins/show_dhcp_server.py

@@ -5,6 +5,8 @@ import utilities_common.cli as clicommon
 
 import ipaddress
 from datetime import datetime
+import fnmatch
+import re
 
 
 def ts_to_str(ts):
@@ -79,6 +81,17 @@ def range(db, range_name):
     click.echo(tabulate(table, headers=headers))
 
 
+def dhcp_interface_is_match(input_, key):
+    regex = fnmatch.translate(input_)
+    regex = re.compile(regex)
+    if regex.match(key):
+        return True
+    for item in key.split("|"):
+        if regex.match(item):
+            return True
+    return False
+
+
 @ipv4.command()
 @click.argument('dhcp_interface', required=False)
 @click.option('--with_customized_options', default=False, is_flag=True)
@@ -116,5 +129,25 @@ def option(db, option_name):
     click.echo(tabulate(table, headers=headers))
 
 
+@ipv4.command()
+@click.argument('interface', required=False)
+@clicommon.pass_db
+def port(db, interface):
+    if not interface:
+        interface = "*"
+    headers = ["Interface", "Bind"]
+    table = []
+    dbconn = db.db
+    for key in dbconn.keys("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|*"):
+        intf = key[len("DHCP_SERVER_IPV4_PORT|"):]
+        if dhcp_interface_is_match(interface, intf):
+            entry = dbconn.get_all("CONFIG_DB", key)
+            if "ranges" in entry:
+                table.append([intf, entry["ranges"].replace(",", "\n")])
+            if "ips" in entry:
+                table.append([intf, entry["ips"].replace(",", "\n")])
+    click.echo(tabulate(table, headers=headers))
+
+
 def register(cli):
     cli.add_command(dhcp_server)