ok, so the mtu problems now seems fixed on solaris and linux.
after taking a little look at irix, it seems to have the same
broken behavior. the problem seems to be with rxi_MatchIfnet()
which always returns 0 (i.e. not a match). so rxi_FindIfnet()
will always return 0 and the ADAPT_MTU code can never determine
the interface (and its mtu). just looking at the code, it looks
like the original author might have been trying to locate a 'best
match' by scoring the various interfaces. my fix for the time
being is to return 1 if match_value != 0:
--- src/rx/IRIX/rx_knet.c.000 Thu Oct 11 11:02:45 2001
+++ src/rx/IRIX/rx_knet.c Thu Oct 11 13:15:58 2001
@@ -314,7 +314,7 @@
}
}
*(int*)arg1 = match_value;
- return 0;
+ return (match_value ? 1 : 0);
}
now my sgi seems to pick up the right mtu for the various servers:
% rxdebug kahless -peers -port 7001
Trying 134.207.10.111 (port 7001):
Free packets: 129, packet reclaims: 0, calls: 16, used FDs: 64
not waiting for packets.
0 calls waiting for a thread
1 threads are idle
Done.
Peer at host 18.7.15.72, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 0 packet resends 0
bytes sent high 0 low 0
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Peer at host 134.207.10.69, port 7000
ifMTU 8524 natMTU 8524 maxMTU 8524
packets sent 76 packet resends 2
bytes sent high 0 low 9399
bytes received high 0 low 0
rtt 2 msec, rtt_dev 1 msec
timeout 0.356 sec
Peer at host 134.207.10.70, port 7000
ifMTU 8524 natMTU 1444 maxMTU 1444
packets sent 0 packet resends 0
bytes sent high 0 low 0
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 2.000 sec
Peer at host 134.207.10.69, port 7003
ifMTU 8524 natMTU 1444 maxMTU 1444
packets sent 38 packet resends 0
bytes sent high 0 low 672
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 2.000 sec
Peer at host 18.72.0.26, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 0 packet resends 0
bytes sent high 0 low 0
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Peer at host 18.179.0.27, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 0 packet resends 0
bytes sent high 0 low 0
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Peer at host 18.179.0.30, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 8 packet resends 0
bytes sent high 0 low 501
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Peer at host 134.207.10.14, port 7000
ifMTU 8524 natMTU 8524 maxMTU 8524
packets sent 76 packet resends 0
bytes sent high 0 low 5186
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 2.000 sec
Peer at host 18.145.0.15, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 0 packet resends 0
bytes sent high 0 low 4
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Peer at host 18.72.1.38, port 7000
ifMTU 1444 natMTU 1444 maxMTU 1444
packets sent 6 packet resends 0
bytes sent high 0 low 69
bytes received high 0 low 0
rtt 0 msec, rtt_dev 0 msec
timeout 3.000 sec
Done.
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