freebsd stable - Jun 2006 - FreeBSD 6-STABLE. Route specific send & receive buffer sizes not working?

or am I missing something?

See attached file below.

route add -sendpipe -recvpipe works on FreeBSD 4.x,  but not on 6-STABLE
(or on 5.4 either - although that's not shown).


I'm trying to set the parameters for specific routes so that I can
properly account for the bw delay product.  (I don't want to do it for
every connection using the global sysctls because these servers can have
many concurrent connections).

Am I doing something wrong?  Or is this a bug?

If it's a bug,  I'll file a PR.
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starbug# uname -a
FreeBSD starbug 6.1-STABLE FreeBSD 6.1-STABLE #5: Mon May 29 14:19:48 BST 2006  
@starbug:/usr/obj/usr/src/sys/STARBUG  i386

starbug# route get rhino
   route to: rhino
destination: default
       mask: default
    gateway: dellboy
  interface: em0
      flags: <UP,GATEWAY,DONE,STATIC>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1500         0


starbug# route add rhino dellboy -recvpipe 196608 -sendpipe 196608 -rtt 100
add host rhino: gateway dellboy


starbug# route get rhino
   route to: rhino
destination: rhino
    gateway: dellboy
  interface: em0
      flags: <UP,GATEWAY,HOST,DONE,STATIC>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1500         0


starbug> $ scp zeros rhino:/tmp
zeros                                         100%   10MB 330.3KB/s   00:31




boycie# uname -a
FreeBSD boycie 4.11-STABLE FreeBSD 4.11-STABLE #2: Fri Jul 15 09:46:13 BST 2005 
@boycie:/usr/obj/usr/src/sys/BOYCIE  i386


boycie# route get rhino
   route to: rhino
destination: default
       mask: default
    gateway: dellboy
  interface: sis0
      flags: <UP,GATEWAY,DONE,STATIC,PRCLONING>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1500         0


boycie# route add rhino dellboy -recvpipe 196608 -sendpipe 196608 -rtt 100
add host rhino: gateway dellboy


boycie# route get rhino
   route to: rhino
destination: rhino
    gateway: dellboy
  interface: sis0
      flags: <UP,GATEWAY,HOST,DONE,STATIC>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
  196608    196608         0         0         0         0      1500         0


boycie>scp zeros rhino:/tmp
zeros                100% |*****************************| 10240 KB    00:16

boycie#route delete rhino
delete host rhino

boycie>scp zeros rhino:/tmp
zeros                100% |*****************************| 10240 KB    00:31