taglinefilesource code
deh_sum80include/linux/atalk.h__u16  deh_sum;
deh_sum1389net/appletalk/ddp.cif(ddp->deh_sum && atalk_checksum(ddp, ddp->deh_len)!= ddp->deh_sum)
deh_sum1588net/appletalk/ddp.cddp->deh_sum=0;
deh_sum1590net/appletalk/ddp.cddp->deh_sum=atalk_checksum(ddp, len+sizeof(*ddp));