Improve IPV6 debugging

2 files changed, 12 insertions, 4 deletions

diff --git a/pysnmp/carrier/asyncore/dgram/base.py b/pysnmp/carrier/asyncore/dgram/base.py
index d38f3080..f72fe57c 100644
--- a/pysnmp/carrier/asyncore/dgram/base.py
+++ b/pysnmp/carrier/asyncore/dgram/base.py
@@ -78,7 +78,7 @@ class DgramSocketTransport(AbstractSocketTransport):
 
             if self.socket.family == socket.AF_INET6:
                 self.socket.setsockopt(socket.SOL_IPV6, socket.IPV6_RECVPKTINFO, flag)
-                self.socket.setsockopt(socket.SOL_IPV6, socket.IPV6_V6ONLY, not flag)
+                self.socket.setsockopt(socket.SOL_IPV6, socket.IPV6_V6ONLY, int(not flag))
 
         except socket.error:
             raise error.CarrierError('setsockopt() for %s failed: %s' % (self.socket.family == socket.AF_INET6 and "IPV6_RECVPKTINFO" or "IP_PKTINFO", sys.exc_info()[1]))
diff --git a/pysnmp/carrier/sockfix.py b/pysnmp/carrier/sockfix.py
index d4ea504e..02480bb2 100644
--- a/pysnmp/carrier/sockfix.py
+++ b/pysnmp/carrier/sockfix.py
@@ -6,7 +6,10 @@
 #
 import socket
 
-symbols = {
+from pysnmp import debug
+
+
+SYMBOLS = {
     'IP_PKTINFO': 8,
     'IP_TRANSPARENT': 19,
     'SOL_IPV6': 41,
@@ -14,6 +17,11 @@ symbols = {
     'IPV6_PKTINFO': 50
 }
 
-for symbol in symbols:
+for symbol, value in SYMBOLS.items():
     if not hasattr(socket, symbol):
-        setattr(socket, symbol, symbols[symbol])
+        setattr(socket, symbol, value)
+
+        debug.logger & debug.flagIO and debug.logger(
+            'WARNING: the socket module on this platform misses option %s. '
+            'Assuming its value is %d.' % (symbol, value)
+        )