Add support for unified Bird daemons

Bird 2.0 includes IPv4 and IPv6 support in a single daemon.
When UNIFIED_DAEMON is set to True, queries are always done with the
"ipv4" backend (which handles both protocols), and distinctions between
IPv4 and IPv4 are removed in the UI.

lg.cfg

@@ -13,6 +13,10 @@ PROXY = {
 		"h3": "h3.some.network:5000",
 	}
 
+# If True, queries are always done with the "ipv4" backend,
+# and the distinction between IPv4 and IPv6 is removed from the UI.
+UNIFIED_DAEMON = True
+
 # Used for bgpmap
 ROUTER_IP = {
         "gw" : [ "91.224.148.2", "2a01:6600:8000::175" ],

lg.py

@@ -32,7 +32,7 @@ from urllib import quote, unquote
 import json
 import random
 
-from toolbox import mask_is_valid, ipv6_is_valid, ipv4_is_valid, resolve, save_cache_pickle, load_cache_pickle, unescape
+from toolbox import mask_is_valid, ip_is_valid, ipv6_is_valid, ipv4_is_valid, resolve, resolve_any, save_cache_pickle, load_cache_pickle, unescape
 #from xml.sax.saxutils import escape
 
 
@@ -119,7 +119,10 @@ def whois_command(query):
 
 def bird_command(host, proto, query):
     """Alias to bird_proxy for bird service"""
-    return bird_proxy(host, proto, "bird", query)
+    if app.config.get("UNIFIED_DAEMON", False):
+        return bird_proxy(host, "ipv4", "bird", query)
+    else:
+        return bird_proxy(host, proto, "bird", query)
 
 
 def bird_proxy(host, proto, service, query):
@@ -305,16 +308,23 @@ def traceroute(hosts, proto):
 
     set_session("traceroute", hosts, proto, q)
 
-    if proto == "ipv6" and not ipv6_is_valid(q):
-        try:
-            q = resolve(q, "AAAA")
-        except:
-            return error_page("%s is unresolvable or invalid for %s" % (q, proto))
-    if proto == "ipv4" and not ipv4_is_valid(q):
-        try:
-            q = resolve(q, "A")
-        except:
-            return error_page("%s is unresolvable or invalid for %s" % (q, proto))
+    if app.config.get("UNIFIED_DAEMON", False):
+        if not ip_is_valid(q):
+            try:
+                q = resolve_any(q)
+            except:
+                return error_page("%s is unresolvable" % q)
+    else:
+        if proto == "ipv6" and not ipv6_is_valid(q):
+            try:
+                q = resolve(q, "AAAA")
+            except:
+                return error_page("%s is unresolvable or invalid for %s" % (q, proto))
+        if proto == "ipv4" and not ipv4_is_valid(q):
+            try:
+                q = resolve(q, "A")
+            except:
+                return error_page("%s is unresolvable or invalid for %s" % (q, proto))
 
     errors = []
     infos = {}
@@ -608,23 +618,37 @@ def show_route(request_type, hosts, proto):
         if len(expression.split("/")) == 2:
             expression, mask = (expression.split("/"))
 
-        if not mask and proto == "ipv4":
-            mask = "32"
-        if not mask and proto == "ipv6":
-            mask = "128"
-        if not mask_is_valid(mask):
-            return error_page("mask %s is invalid" % mask)
+        if app.config.get("UNIFIED_DAEMON", False):
+            if not ip_is_valid(expression):
+                try:
+                    expression = resolve_any(expression)
+                except:
+                    return error_page("%s is unresolvable" % expression)
 
-        if proto == "ipv6" and not ipv6_is_valid(expression):
-            try:
-                expression = resolve(expression, "AAAA")
-            except:
-                return error_page("%s is unresolvable or invalid for %s" % (expression, proto))
-        if proto == "ipv4" and not ipv4_is_valid(expression):
-            try:
-                expression = resolve(expression, "A")
-            except:
-                return error_page("%s is unresolvable or invalid for %s" % (expression, proto))
+            if not mask and ipv4_is_valid(expression):
+                mask = "32"
+            if not mask and ipv6_is_valid(expression):
+                mask = "128"
+            if not mask_is_valid(mask):
+                return error_page("mask %s is invalid" % mask)
+        else:
+            if not mask and proto == "ipv4":
+                mask = "32"
+            if not mask and proto == "ipv6":
+                mask = "128"
+            if not mask_is_valid(mask):
+                return error_page("mask %s is invalid" % mask)
+
+            if proto == "ipv6" and not ipv6_is_valid(expression):
+                try:
+                    expression = resolve(expression, "AAAA")
+                except:
+                    return error_page("%s is unresolvable or invalid for %s" % (expression, proto))
+            if proto == "ipv4" and not ipv4_is_valid(expression):
+                try:
+                    expression = resolve(expression, "A")
+                except:
+                    return error_page("%s is unresolvable or invalid for %s" % (expression, proto))
 
         if mask:
             expression += "/" + mask

templates/detail.html

@@ -1,7 +1,7 @@
 {% extends "layout.html" %}
 {% block body %}
 {% for host in detail %}
-<h3>{{host}}/{{session.proto}}: {{command}}</h3>
+<h3>{{host}}{% if not config.UNIFIED_DAEMON %}/{{session.proto}}{% endif %}: {{command}}</h3>
 <i>{{ detail[host].status }}</i><br /><br />
 <pre>
 {{ detail[host].description|trim|safe }}

templates/layout.html

@@ -24,10 +24,12 @@
 					{% endfor %}
 				</ul>
 
+        {% if not config.UNIFIED_DAEMON %}
 				<div class="btn-group">
 					<a class="btn btn-primary proto" id="ipv4" href="#">ipv4</a>
 					<a class="btn btn-primary proto" id="ipv6" href="#">ipv6</a>
         </div>
+        {% endif %}
 
 				<ul class="nav">
 					<li class="nav-item dropdown request_type">
@@ -74,7 +76,7 @@
 							{% for hosts, proto, request_type, request_args in session.history %}
 							<a class="list-group-item list-group-item-action {% if loop.first %}active{% endif %}"
               href="/{{ [request_type, hosts, proto]|join("/") }}{% if request_args %}?q={{request_args}}{% endif %}">
-                  {{hosts}}/{{proto}}: {{ commands_dict[request_type]|replace("...", request_args) }}
+                {{hosts}}{% if not config.UNIFIED_DAEMON %}/{{proto}}{% endif %}: {{ commands_dict[request_type]|replace("...", request_args) }}
               </a>
 
 							{% endfor %}

toolbox.py

@@ -31,6 +31,14 @@ resolv.lifetime = 1
 def resolve(n, q):
 	return str(resolv.query(n,q)[0])
 
+def resolve_any(h):
+    try:
+        return resolve(h, "AAAA")
+    except:
+        pass
+    return resolve(h, "A")
+
+
 def mask_is_valid(n):
 	if not n: 
 		return True
@@ -40,6 +48,9 @@ def mask_is_valid(n):
 	except:
 		return False
 
+def ip_is_valid(n):
+    return ipv4_is_valid(n) or ipv6_is_valid(n)
+
 def ipv4_is_valid(n):
     try:
         socket.inet_pton(socket.AF_INET, n)