---------------------------------------------------------
app_proto_icmp
---------------------------------------------------------
status=0
errno=0
herrno=0
bufsiz=16384
dbd_off=128 dbd_len=32
key_off=160 key_len=5
data_off=168 data_len=12
ext_off=0 ext_len=0
key=icmp
data: name=icmp number=1 aliases=ICMP