Description of problem:
It seems the arping utility is incorrectly returning -1 received packets when
run on top of an infiniband interface.

[root@flopteron iputils]# !./arping
./arping -c 2 -w 3 -D -I ib0 192.168.0.62
ARPING 192.168.0.62 from 0.0.0.0 ib0
Sent 2 probes (2 broadcast(s))
Received -1 response(s)

This causes the ifup script to think the address is already in use on the network.

Version-Release number of selected component (if applicable):

iputils-20020927-19

How reproducible:

always

this patch seems to fix at least the negative return.

--- arping.c.orig       2005-03-02 15:29:50.820076282 -0800
+++ arping.c    2005-03-02 15:52:36.613692634 -0800
@@ -56,7 +56,7 @@
 struct timeval start, last;

 int sent, brd_sent;
-int received, brd_recv, req_recv;
+int received = 0, brd_recv, req_recv;

 #define MS_TDIFF(tv1,tv2) ( ((tv1).tv_sec-(tv2).tv_sec)*1000 + \
                           ((tv1).tv_usec-(tv2).tv_usec)/1000 )

Now, I get:

[root@flopteron iputils]# ./arping -c 2 -w 3 -D -I ib0 192.168.0.62
ARPING 192.168.0.62 from 0.0.0.0 ib0
Sent 2 probes (2 broadcast(s))
Received 0 response(s)

Which allows ifup to continue.