On Thu, Aug 25, 2005 at 09:27:19AM +0100, Dave Shield wrote: > On Wed, 2005-08-24 at 22:52 +0200, Magnus Fromreide wrote: > > If we look at the code then in agentx/master.c there is the line > > > > sess.local_port = AGENTX_PORT; > > > > but if I look at netsnmp_tcp_create_tstring in snmplib/snmpTCPDomain.c then > > netsnmp_sockaddr_in is called with the third argument 0, neither local nor > > remote, and in netsnmp_tcp_transport local is used as a flag to determine > > if it is a server or client connection. > > Good catch. > This feels like a hold-over from the change to a modular transport > system, which effectively deprecated the 'local_port' field. We > ran into a similar problem with the handling of trap ports - this > one has obviously slipped through the net. > > > I suspect that the easiest fix will be the same approach as for the > trap problem - have the AgentX master code explicitly append the > default port to the transport string (assuming there isn't one > there already, obviously!). > > > Comments?
The solution in snmptrapd.c at about line 1133 looks as if it would break if an IPv6 numeric address, or just a netsnmp address with transport specifier, is used. Beyound that I suppose you are correct, but it feels as if this couldn't be the only places in the agent that are affected by this, even though I can't find any other places in the source using grep. What I really would like to be able to do is to intercept the transport construction when it have decided that it wish to build a FOO transport and fix up the parameters then if there is a need for it. On a completley unrelated tangent, how do I make a transport bind to a random free port? (Yes, the protocol is not specific about what port to use, it just provides a way for the other side to detect it) /MF ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
