[Samba] cannot bind when doing a browser sync

[Eric V. Smith]

Stupidly, I forgot to say I'm running samba-3.0.10-1.fc2 on FC2 
2.6.8-1.521.  If it makes a difference, the tunneling is done with the 
kernel IPSec.

Eric.


Eric V. Smith wrote:
> I hope this isn't too long, and I hope it's the correct list.
> 
> I have a network configuration where I have 2 hosts, A and B.  Each has 
> a local LAN on which the run Samba, plus they're connected by a VPN.  So 
> has A has addresses lanA and wanA, and host B has addresses lanB and 
> wanB.  Because of the way the VPN works, they can talk to each other 
> either via their LAN addresses (lanA <-> lanB), or their WAN addresses 
> (wanA <-> wanB), but not lanA <-> wanB, or lanB <-> wanA.  Each host has 
> only their LAN interface in smb.conf, and has "bind interfaces only = 
> yes".  Everything relating to smbd works great.
> 
> I'm trying to set up host A as a domain master browser, and host B as a 
> local master browser.  This works fine, until they try to sync the 
> browse list.  They register with each other correctly because 
> nmbd/nmbd_sendannounce.c's browse_sync_remote is binding to the LAN 
> address:
> 
> send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
>               global_myname(), 0x0, "*", 0x0, addr, FIRST_SUBNET->myip, 
> DGRAM_PORT);
> 
> So I have "remote browse sync" set to the other hosts's LAN address, 
> because the source address must local host's LAN address 
> (FIRST_SUBNET->myip).  I've verified that each host sees the other's 
> browse sync request.
> 
> So that's all well and good, but the actual sync happens in 
> nmbd_synclists.c's sync_child().  It isn't doing any bind() or anything 
> to set the source address, so it is sending data from wanA to lanB, but 
> that doesn't work in my case.
> 
> Is there any way to control the source address that sync_child() uses? 
> Any other suggestions?
> 
> Thanks.
> 
> Eric.