def decode_link(o, bytes):
"""Assume bytes starts with the LRH and parse accordingly. Returns bytes
starting at the MAD header"""
lhdr = IBA.HdrLRH(bytes)
off = 8
if o.verbosity >= 1:
lhdr.printer(sys.stdout)
if lhdr.LNH & 1 == 1:
ghdr = IBA.HdrGRH(bytes[off:])
if o.verbosity >= 1:
ghdr.printer(sys.stdout)
off = off + 40
bth = IBA.HdrBTH(bytes[off:])
if o.verbosity >= 1:
bth.printer(sys.stdout)
off = off + 12
if bth.service == 3 and bth.function == 4:
deth = IBA.HdrDETH(bytes[off:])
if o.verbosity >= 1:
deth.printer(sys.stdout)
off = off + 8
return bytes[off:]
