From b812bae9e317f7bcc91371316af28d07345682ba Mon Sep 17 00:00:00 2001
From: Daniil Baturin <daniil@baturin.org>
Date: Mon, 26 Aug 2019 19:58:04 +0200
Subject: T1598: add a vyos-hostsd operation for retrieving name servers by
 tag.

---
 python/vyos/hostsd_client.py |  7 +++++++
 src/services/vyos-hostsd     | 18 +++++++++++++++++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/python/vyos/hostsd_client.py b/python/vyos/hostsd_client.py
index e2f05071b..f009aba98 100644
--- a/python/vyos/hostsd_client.py
+++ b/python/vyos/hostsd_client.py
@@ -30,6 +30,8 @@ class Client(object):
             reply = json.loads(reply_msg)
             if 'error' in reply:
                 raise VyOSHostsdError(reply['error'])
+            else:
+                return reply["data"]
         except zmq.error.Again:
             raise VyOSHostsdError("Could not connect to vyos-hostsd")
 
@@ -60,3 +62,8 @@ class Client(object):
     def delete_name_servers(self, tag):
         msg = {'type': 'name_servers', 'op': 'delete', 'tag': tag}
         self._communicate(msg)
+
+    def get_name_servers(self, tag):
+        msg = {'type': 'name_servers', 'op': 'get', 'tag': tag}
+        return self._communicate(msg)
+
diff --git a/src/services/vyos-hostsd b/src/services/vyos-hostsd
index 1bcb2e1f5..8f70eb4e9 100755
--- a/src/services/vyos-hostsd
+++ b/src/services/vyos-hostsd
@@ -171,6 +171,14 @@ def set_host_name(state, data):
     if data['search_domains']:
         state['search_domains'] = data['search_domains']
 
+def get_name_servers(state, tag):
+    ns = []
+    data = state['name_servers']
+    for n in data:
+        if data[n]['tag'] == tag:
+            ns.append(n)
+    return ns
+
 def get_option(msg, key):
     if key in msg:
         return msg[key]
@@ -209,6 +217,13 @@ def handle_message(msg_json):
             set_host_name(STATE, data)
         else:
             raise ValueError("Unknown message type {0}".format(_type))
+    elif op == 'get':
+        tag = get_option(msg, 'tag')
+        if _type == 'name_servers':
+            result = get_name_servers(STATE, tag)
+        else:
+            raise ValueError("Unimplemented")
+        return result
     else:
         raise ValueError("Unknown operation {0}".format(op))
 
@@ -254,7 +269,8 @@ if __name__ == '__main__':
         resp = {}
 
         try:
-            handle_message(message)
+            result = handle_message(message)
+            resp['data'] = result
         except ValueError as e:
             resp['error'] = str(e)
         except:
-- 
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