From c4c183a16fe2ddc612ed947fc5513c87f30c7c27 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Fri, 2 Nov 2018 16:14:22 +0100
Subject: T939: Remove possibility to specify DHCP relay port

---
 src/conf_mode/dhcp_relay.py             |  8 +-------
 src/conf_mode/dhcpv6_relay.py           |  8 +-------
 src/migration-scripts/dhcp-relay/1-to-2 | 35 +++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 14 deletions(-)
 create mode 100755 src/migration-scripts/dhcp-relay/1-to-2

(limited to 'src')

diff --git a/src/conf_mode/dhcp_relay.py b/src/conf_mode/dhcp_relay.py
index 61b494b7e..1b2abed9e 100755
--- a/src/conf_mode/dhcp_relay.py
+++ b/src/conf_mode/dhcp_relay.py
@@ -43,14 +43,13 @@ SERVERS="{{ server | join(' ') }}"
 INTERFACES="{{ interface | join(' ') }}"
 
 # Additional options that are passed to the DHCP relay daemon?
-OPTIONS="-4 {% if port -%} -p {{ port }}{%- endif %} {{ options | join(' ') }}"
+OPTIONS="-4 {{ options | join(' ') }}"
 """
 
 default_config_data = {
     'interface': [],
     'server': [],
     'options': [],
-    'port': '',
     'hop_count': '10',
     'relay_agent_packets': 'forward'
 }
@@ -86,11 +85,6 @@ def get_config():
         size = '-A ' + conf.return_value('max-size')
         relay['options'].append(size)
 
-    # Listen and transmit on port <xy>. This is mostly useful for debugging
-    # purposes. Default is port 67 for DHCPv4/BOOTP, or port 547 for DHCPv6.
-    if conf.exists('port'):
-        relay['port'] = conf.return_value('port')
-
     # Control the handling of incoming DHCPv4 packets which already contain
     # relay agent options. If such a packet does not have giaddr set in its
     # header, the DHCP standard requires that the packet be discarded. However,
diff --git a/src/conf_mode/dhcpv6_relay.py b/src/conf_mode/dhcpv6_relay.py
index 959bf0496..86e3f8265 100755
--- a/src/conf_mode/dhcpv6_relay.py
+++ b/src/conf_mode/dhcpv6_relay.py
@@ -31,13 +31,12 @@ config_tmpl = """
 
 # Defaults for isc-dhcpv6-relay initscript sourced by /etc/init.d/isc-dhcpv6-relay
 
-OPTIONS="-6 -l {{ listen_addr | join('-l ') }} {% if port -%} -p {{ port }}{%- endif %} {{ options | join(' ') }} -u {{ upstream_addr | join('-u ') }}"
+OPTIONS="-6 -l {{ listen_addr | join('-l ') }} {{ options | join(' ') }} -u {{ upstream_addr | join('-u ') }}"
 """
 
 default_config_data = {
     'listen_addr': [],
     'upstream_addr': [],
-    'port': '',
     'options': [],
 }
 
@@ -65,11 +64,6 @@ def get_config():
             server = addr + '%' + intf
             relay['upstream_addr'].append(server)
 
-    # Listen and transmit on port <xy>. This is mostly useful for debugging
-    # purposes. Default is port 67 for DHCPv4/BOOTP, or port 547 for DHCPv6.
-    if conf.exists('listen-port'):
-        relay['port'] = conf.return_value('listen-port')
-
     # Maximum hop count. When forwarding packets, dhcrelay discards packets
     # which have reached a hop count of COUNT. Default is 10. Maximum is 255.
     if conf.exists('max-hop-count'):
diff --git a/src/migration-scripts/dhcp-relay/1-to-2 b/src/migration-scripts/dhcp-relay/1-to-2
new file mode 100755
index 000000000..b72da1028
--- /dev/null
+++ b/src/migration-scripts/dhcp-relay/1-to-2
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+
+# Delete "set service dhcp-relay relay-options port" option
+# Delete "set service dhcpv6-relay listen-port" option
+
+import sys
+
+from vyos.configtree import ConfigTree
+
+if (len(sys.argv) < 1):
+    print("Must specify file name!")
+    sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+
+if not (config.exists(['service', 'dhcp-relay', 'relay-options', 'port']) or config.exists(['service', 'dhcpv6-relay', 'listen-port'])):
+    # Nothing to do
+    sys.exit(0)
+else:
+    # Delete abandoned node
+    config.delete(['service', 'dhcp-relay', 'relay-options', 'port'])
+    # Delete abandoned node
+    config.delete(['service', 'dhcpv6-relay', 'listen-port'])
+
+    try:
+        with open(file_name, 'w') as f:
+            f.write(config.to_string())
+    except OSError as e:
+        print("Failed to save the modified config: {}".format(e))
+        sys.exit(1)
-- 
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