diff options
Diffstat (limited to 'include/net.h')
| -rw-r--r-- | include/net.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net.h b/include/net.h index 730af4f16..3bf08063e 100644 --- a/include/net.h +++ b/include/net.h @@ -259,7 +259,9 @@ struct arp_hdr { # define ARP_ETHER 1 /* Ethernet hardware address */ ushort ar_pro; /* Format of protocol address */ uchar ar_hln; /* Length of hardware address */ +# define ARP_HLEN 6 uchar ar_pln; /* Length of protocol address */ +# define ARP_PLEN 4 ushort ar_op; /* Operation */ # define ARPOP_REQUEST 1 /* Request to resolve address */ # define ARPOP_REPLY 2 /* Response to previous request */ @@ -273,6 +275,10 @@ struct arp_hdr { * specific hardware/protocol combinations. */ uchar ar_data[0]; +#define ar_sha ar_data[0] +#define ar_spa ar_data[ARP_HLEN] +#define ar_tha ar_data[ARP_HLEN + ARP_PLEN] +#define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] #if 0 uchar ar_sha[]; /* Sender hardware address */ uchar ar_spa[]; /* Sender protocol address */ |