Hi, I know, IPv4 is deprecated and will be removed soon... Until that day comes, these patches will help me a lot on some of our servers.
We have a VLAN, where our customers have IPv4 Networks with private IPs (rfc1918). The most favourite addresses are 192.168.1.* and so, normal routing doesn't work. The servers, that we are using, to access those customer networks are: Solaris 10 RedHat Linux with policy routing Policy Routing is nice - i can just bind an IP address to a socket and the kernel routes those packets through that interface - everything is fine. On the Solaris servers, i don't have that. I have to connect directly to the interface by name. Some years ago, i already sent in a patch for binding an IP address to a socket and those patches have been accepted - i can see them in the code. That helps on Linux with policy routing. The new patches will add that binding by interface name and also let the tools (snmpwalk, snmpget, ...) make use of the new features. snmplib/snmp_parse_args.c I have chosen "q" and "Q" for the parameters "local IP" and "local interface", because these are not in use in 5.7. You might find, that these are inappropriate for any reason and change them. include/net-snmp/library/default_store.h I used the next free number (35) for the local interface. That can be changed to any other number. snmplib/transports/snmpUDPBaseDomain.c At first, i used setsockopt with SO_BINDTODEVICE, to bind a socket to an interface on Solaris. Later, i got another RedHat Server, that didn't have policy routing. So i had to add some code to netsnmp_udpbase_sendto, which sets values in the struct iovec. perl/SNMP/SNMP.pm and perl/SNMP/SNMP.pm small changes allow the perl modules, to make use of interface binding too. You might like to change the names for the parameters... There's a txtfile attached, that has been created with "diff -c" on all files, that i changed. I hope, this is convenient for you. -- mit freundlichen Gruessen / with friendly regards Michael Buchholz [email protected] MSAS Support Verizon Business Sebrathweg 20 44149 Dortmund Germany Vnet: 3171192 Tel: +492319721192 Fax: +492319722508 Home-Office: +492319479858 Verizon Deutschland GmbH - Sebrathweg 20, 44149 Dortmund, Germany - Amtsgericht Dortmund, HRB 14952 - Geschäftsführer: Detlef Eppig - Vorsitzender des Aufsichtsrats: Dominique Gaillard
net-snmp-5.7-changes.txt
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