[Spread-users] Trouble binding to specific interface

[Jonathan Stanton]

Ah Ha. A special case where you do not need a broadcast bind because there
is only one daemon running, so if you try to do the broadcast bind you end
up binding to 0.0.0.0 instead of 127.0.0.255. I've attached a patch to this
email that fixes the problem for me. 

Tell me if you find any more quirks like this. 

Thanks,

Jonathan

On Thu, Nov 15, 2001 at 07:32:33PM -0800, Dave Parker wrote:
> I'm trying to set up a spread daemon such that it only listens on the
> loopback interface, thus:
> 
> DebugFlags = { PRINT EXIT }
> EventLogFile = /var/log/spread.log
> EventTimeStamp
> DangerousMonitor = true
> Spread_Segment  127.0.0.255:4803 {
>         localhost               127.0.0.1  {
>                 D 127.0.0.1
>                 C 127.0.0.1
>         }
> }
> 
> It is however consistently failing to start:
> 
> [Fri 16 Nov 2001 03:17:25] DL_init_channel: bind error for port 4803,
> already running
> 
> An strace reveals:
> 
> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
> bind(3, {sin_family=AF_INET, sin_port=htons(4803),
> sin_addr=inet_addr("0.0.0.0")}}, 16) = 0
> setsockopt(3, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 5
> bind(5, {sin_family=AF_INET, sin_port=htons(4803),
> sin_addr=inet_addr("127.0.0.1")}}, 16) = -1 EADDRINUSE (Address already
> in use)
> 
> Any ideas?
> 
> 
> _______________________________________________
> Spread-users mailing list
> Spread-users at lists.spread.org
> http://lists.spread.org/mailman/listinfo/spread-users

-- 
-------------------------------------------------------
Jonathan R. Stanton         jonathan at cs.jhu.edu
Dept. of Computer Science   
Johns Hopkins University    
-------------------------------------------------------
-------------- next part --------------
--- network.c.orig	Thu Nov 15 21:57:27 2001
+++ network.c	Thu Nov 15 21:58:05 2001
@@ -124,7 +124,8 @@
                                 interface_addr = 0;
                         else {
                                 interface_addr = My.ifc[i].ip;
-                                Bcast_channel[Num_bcast_channels++] = DL_init_channel( RECV_CHANNEL, My.port, Bcast_address, Bcast_address );
+                                if (Bcast_needed) 
+                                    Bcast_channel[Num_bcast_channels++] = DL_init_channel( RECV_CHANNEL, My.port, Bcast_address, Bcast_address );
                         }
                         Bcast_channel[Num_bcast_channels++] = DL_init_channel( RECV_CHANNEL, My.port, Bcast_address, interface_addr );
                         Token_channel[Num_token_channels++] = DL_init_channel( RECV_CHANNEL, My.port+1, 0, interface_addr );