taglinefilesource code
ar_hln74include/linux/if_arp.hunsigned char  ar_hln;    /* length of hardware address  */
ar_hln331net/inet/arp.carp->ar_hln = dev->addr_len;
ar_hln549net/inet/arp.cif (arp->ar_hln != dev->addr_len    || 
ar_hln157net/inet/rarp.cif (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd) 
ar_hln209net/inet/rarp.cif (!memcmp(entry->ha, sha, rarp->ar_hln))