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Subject: [Bug 200379] SCTP stack is not FIB aware
Date: Fri, 22 May 2015 01:34:33 +0000
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X-Bugzilla-Version: 11.0-CURRENT
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200379

            Bug ID: 200379
           Summary: SCTP stack is not FIB aware
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: rodrigc@FreeBSD.org

If I use a system with multiple routing FIB's, I cannot send SCTP traffic
to an address which uses an alternate FIB.

To reproduce:

1.  Put the following in /boot/loader.conf to create 5 FIBs

    net.fibs=5

2.  Reboot

3.  Create a VLAN on an alternate FIB:

    For instance, if I have em0:

   ifconfig em0.3275 create name craig0 fib 2
   ifconfig craig0 inet6 ifdisabled fib 2
   ifconfig ctrleth0 inet 172.8.1.3/16 up fib 2
   route add 127.0.0.0/8 -interface lo0 -fib 2

4.  Run the server program, which binds to 172.8.1.3 address and
    uses fib 2:

   ./server 172.8.1.3 2

5. Perform similar steps to 3 on a separate machine or VM and use 172.8.1.4 as 
   the address.
   Run the client program which binds to 172.8.1.4 address, sends
   to 172.8.1.3 address, and uses fib 2:

   ./client 172.8.1.4 172.8.1.3 2

The data does not get sent from client to server.
If I use addresses which are not associated with an alternate FIB then
the data gets sent from the client to the server.

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