diff options
Diffstat (limited to 'net/net.c')
| -rw-r--r-- | net/net.c | 23 |
1 files changed, 23 insertions, 0 deletions
@@ -1276,6 +1276,29 @@ NetSetEther(uchar *xet, uchar * addr, uint prot) } } +int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) +{ + ushort protlen; + + memcpy(et->et_dest, addr, 6); + memcpy(et->et_src, NetOurEther, 6); + protlen = ntohs(et->et_protlen); + if (protlen == PROT_VLAN) { + struct vlan_ethernet_hdr *vet = + (struct vlan_ethernet_hdr *)et; + vet->vet_type = htons(prot); + return VLAN_ETHER_HDR_SIZE; + } else if (protlen > 1514) { + et->et_protlen = htons(prot); + return ETHER_HDR_SIZE; + } else { + /* 802.2 + SNAP */ + struct e802_hdr *et802 = (struct e802_hdr *)et; + et802->et_prot = htons(prot); + return E802_HDR_SIZE; + } +} + void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source) { struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; |