Hi Rami, Sorry for the delay in response. In the buggy code, the missing lines were the following: 115 data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; 116 linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; Above code is to adjust the length for nested attributes. I missed it and the constructed packet was messed up. 'dmesg' was not throwing any errors and I was stuck, trying to debug. Thx. On Wed, Aug 19, 2015 at 3:28 AM, Rami Rosen <roszenrami@xxxxxxxxx> wrote: > Hi, Bhaskar, > > Thanks for posting the code. > >>PS: I am humbled to see a reply from you. I read Chapter 2 from your >>book to understand netlink sockets. > > I hope you enjoyed it and find it useful! > >>+ My code is not creating VLAN interface as executed by the 'ip link >>...' command. > > Can you elaborate a bit about this: which difference do you see between creating > a VLAN with > ip link add name eth2.200 link eth2 type vlan id 200 > > And running your program (let's call your executable "vlan_nl") > in this way: > ./vlan_nl eth1.100 eth1 100 > > > > Regards, > Rami Rosen > http://ramirose.wix.com/ramirosen _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
