dnl so trim off the end of the line where differences appear.
AT_CHECK([sed 's/\(length 60:\).*/\1 .../' stdout], [0], [dnl
OFPT_PACKET_IN (xid=0x0): total_len=60 in_port=3 data_len=60 buffer=0x00000111
dnl so trim off the end of the line where differences appear.
AT_CHECK([sed 's/\(length 60:\).*/\1 .../' stdout], [0], [dnl
OFPT_PACKET_IN (xid=0x0): total_len=60 in_port=3 data_len=60 buffer=0x00000111