Do not set IP_PKTINFO socket option on IPv6 socket

Trying to understand why sendmsg() fails on a transparent
IPv6 socket

2 files changed, 3 insertions, 4 deletions

diff --git a/pysnmp/carrier/asyncore/dgram/base.py b/pysnmp/carrier/asyncore/dgram/base.py
index 4dcc77a3..f6ebbbe9 100644
--- a/pysnmp/carrier/asyncore/dgram/base.py
+++ b/pysnmp/carrier/asyncore/dgram/base.py
@@ -73,12 +73,11 @@ class DgramSocketTransport(AbstractSocketTransport):
             raise error.CarrierError('sendmsg()/recvmsg() interface is not supported by this OS and/or Python version')
 
         try:
-            if self.socket.family in (socket.AF_INET, socket.AF_INET6):
+            if self.socket.family == socket.AF_INET:
                 self.socket.setsockopt(socket.SOL_IP, socket.IP_PKTINFO, flag)
 
             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, 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/sockmsg.py b/pysnmp/carrier/sockmsg.py
index 909407a9..4ff55a91 100644
--- a/pysnmp/carrier/sockmsg.py
+++ b/pysnmp/carrier/sockmsg.py
@@ -121,8 +121,8 @@ else:
                 ancdata = [(socket.SOL_IPV6, socket.IPV6_PKTINFO, memoryview(_f).tobytes())]
 
             debug.logger & debug.flagIO and debug.logger(
-                'sendto: sending %d octets to %s; '
-                'iov blob %r' % (len(data), _to, ancdata))
+                'sendto: sending %d octets to %s; address %r; '
+                'iov blob %r' % (len(_data), _to, addr, ancdata))
 
             return s.sendmsg([_data], ancdata, 0, _to)