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Dear tech-net staff

I have some issues which relate to multicast address

I would like to make it clearly. Please correct me if
I have some wrong points. I have three cases to ask
you about OS NetBSD. On my OS NetBSD, I have two
interface: sip0 (index is 1) and lo0 (index is 2). Of
course, the index of anylocal is zero.

    1. Client and server are on the same machine
("case1.tar")
       In this case, I run application on OS NetBSD. I
use interface sip0 as default interface to exchange
data. After server joins multicast address, it will
wait client to send data. But server can not receive
data and the result is failed.
       If I run this application on OS Linux, the
result is passed. Client and server can exchange data
together. Of course, I use interface eth0 as default
interface (if you test, please select correct index on
Linux , maybe index is 2 or 3 or ...).
       But if I set interface's index is zero and run
application on NetBSD. Client and server can exchange
data each other and result is passed. On Linux, result
is also passed
       Please have a look these following coding lines
to set index of interface in file server6.c
              index1 = 1;
                if (setsockopt(sockfd, IPPROTO_IPV6,
IPV6_MULTICAST_IF, (const                    
char*)&index1, sizeof(index1)) < 0){
                    perror("setsockopt");
                exit(1);
                }   

    2. Server is on OS NetBSD, client is on another
machine (Linux or other OS) ("case2.tar)
       In this case, I use two machines (server is
NetBSD, client is Linux). At first time, I choose
interface's index is zero (file server6.c). The result
is failed. At second time, I set interface's index is
1 (sip0), the result is passed.
       But if I use two OS Linux, the result is passed
for both above cases.
       The coding line is the same with case1

    3. Client is on OS NetBSD, server is on another
machine ("case3.tar")
       In this case, I use default interface of system
and server is on OS Linux. I see client can send data,
but server still can not receive that data, so the
result is failed. But If I put client on Linux, client
and server can exchange data and result is passed.

Would you please checking these problems on NetBSD
system? I wonder that "Did I configure incorrectly?".
If these problems  are due to configuration. Please
give me your instructions. Or if I misunderstand,
please correct me.

Here are information on my system
    OS NetBSD: NetBSD necat 3.1 NetBSD 3.1 (GENERIC)
#0: Tue Oct 31       04:27:07 UTC 2006  
builds@b0.netbsd.org:/home/builds/ab/netbsd-3-1-RELEASE/i386/200610302053Z-obj/home/builds/ab/netbsd-3-1-RELEASE/src/sys/arch/i386/compile/GENERIC
i386

    OS Linux: Linux FedoraCore5 2.6.15-1.2054_FC5 #1
Tue Mar 14 15:48:33 EST 2006 i686 i686 i386 GNU/Linux

Thanks in advance

Best regards
Nam Phan


      ____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page. 
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