enum ofp_return_code ofp_arp_processing(odp_packet_t *pkt)
{
struct ofp_arphdr *arp;
struct ofp_ifnet *dev = odp_packet_user_ptr(*pkt);
struct ofp_ifnet *outdev = dev;
uint16_t vlan = dev->vlan;
uint8_t inner_from_mac[OFP_ETHER_ADDR_LEN];
uint32_t is_ours;
arp = (struct ofp_arphdr *)odp_packet_l3_ptr(*pkt, NULL);
if (odp_unlikely(arp == NULL)) {
OFP_DBG("arp is NULL");
return OFP_PKT_DROP;
}
/* save the received arp info */
if (odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REPLY)
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
OFP_DBG("Device IP: %s, Packet Dest IP: %s",
ofp_print_ip_addr(dev->ip_addr),
ofp_print_ip_addr(arp->ip_dst));
/* Check for VXLAN interface */
if (odp_unlikely(ofp_if_type(dev) == OFP_IFT_VXLAN)) {
ofp_vxlan_update_devices(*pkt, arp, &vlan, &dev, &outdev,
inner_from_mac);
}
is_ours = dev->ip_addr && dev->ip_addr == (ofp_in_addr_t)(arp->ip_dst);
if (!is_ours && !global_param->arp.check_interface) {
/* This may be for some other local interface. */
uint32_t flags;
struct ofp_nh_entry *nh;
nh = ofp_get_next_hop(dev->vrf, arp->ip_dst, &flags);
if (nh)
is_ours = nh->flags & OFP_RTF_LOCAL;
}
/* on our interface an ARP request */
if (is_ours &&
odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REQUEST) {
struct ofp_arphdr tmp;
struct ofp_ether_header tmp_eth;
struct ofp_ether_vlan_header tmp_eth_vlan;
void *l2_addr = odp_packet_l2_ptr(*pkt, NULL);
struct ofp_ether_header *eth =
(struct ofp_ether_header *)l2_addr;
struct ofp_ether_vlan_header *eth_vlan =
(struct ofp_ether_vlan_header *)l2_addr;
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
if (vlan)
tmp_eth_vlan = *eth_vlan;
else
tmp_eth = *eth;
OFP_DBG("Reply to ARPOP_REQ from ip %s"
#ifdef SP
"on IF %d"
#endif
" mac %s ip %s",
ofp_print_ip_addr(arp->ip_src),
#ifdef SP
dev->linux_index,
#endif
ofp_print_mac(dev->mac),
ofp_print_ip_addr(arp->ip_dst));
tmp = *arp;
tmp.ip_dst = arp->ip_src;
tmp.ip_src = arp->ip_dst;
memcpy(&tmp.eth_dst, &arp->eth_src, OFP_ETHER_ADDR_LEN);
memcpy(&tmp.eth_src, dev->mac, OFP_ETHER_ADDR_LEN);
tmp.op = odp_cpu_to_be_16(OFP_ARPOP_REPLY);
*arp = tmp;
if (vlan) {
memcpy(tmp_eth_vlan.evl_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth_vlan.evl_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth_vlan = tmp_eth_vlan;
} else {
memcpy(tmp_eth.ether_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth.ether_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth = tmp_eth;
}
if (odp_unlikely(ofp_if_type(dev) == OFP_IFT_VXLAN)) {
/* Restore the original vxlan header and
update the addresses */
ofp_vxlan_restore_and_update_header
(*pkt, outdev, inner_from_mac);
}
return send_pkt_out(outdev, *pkt);
}
return OFP_PKT_CONTINUE;
}
enum ofp_return_code ofp_arp_processing(odp_packet_t pkt)
{
struct ofp_arphdr *arp;
struct ofp_ifnet *dev = odp_packet_user_ptr(pkt);
struct ofp_ifnet *outdev = dev;
uint16_t vlan = dev->vlan;
uint8_t inner_from_mac[OFP_ETHER_ADDR_LEN];
arp = (struct ofp_arphdr *)odp_packet_l3_ptr(pkt, NULL);
if (odp_unlikely(arp == NULL)) {
OFP_DBG("arp is NULL");
return OFP_PKT_DROP;
}
/* save the received arp info */
if (odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REPLY)
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
OFP_DBG("Device IP: %s, Packet Dest IP: %s",
ofp_print_ip_addr(dev->ip_addr),
ofp_print_ip_addr(arp->ip_dst));
/* Check for VXLAN interface */
if (odp_unlikely(!PHYS_PORT(dev->port))) {
switch (dev->port) {
case GRE_PORTS:
/* Never happens. */
break;
case VXLAN_PORTS: {
ofp_vxlan_update_devices(arp, &vlan, &dev, &outdev,
inner_from_mac);
break;
}
} /* switch */
}
/* on our interface an ARP request */
if ((dev->ip_addr) && dev->ip_addr == (ofp_in_addr_t)(arp->ip_dst) &&
odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REQUEST) {
struct ofp_arphdr tmp;
struct ofp_ether_header tmp_eth;
struct ofp_ether_vlan_header tmp_eth_vlan;
void *l2_addr = odp_packet_l2_ptr(pkt, NULL);
struct ofp_ether_header *eth =
(struct ofp_ether_header *)l2_addr;
struct ofp_ether_vlan_header *eth_vlan =
(struct ofp_ether_vlan_header *)l2_addr;
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
if (vlan)
tmp_eth_vlan = *eth_vlan;
else
tmp_eth = *eth;
OFP_DBG("Reply to ARPOP_REQ from ip %s"
#ifdef SP
"on IF %d"
#endif
" mac %s ip %s",
ofp_print_ip_addr(arp->ip_src),
#ifdef SP
dev->linux_index,
#endif
ofp_print_mac(dev->mac),
ofp_print_ip_addr(arp->ip_dst));
tmp = *arp;
tmp.ip_dst = arp->ip_src;
tmp.ip_src = arp->ip_dst;
memcpy(&tmp.eth_dst, &arp->eth_src, OFP_ETHER_ADDR_LEN);
memcpy(&tmp.eth_src, dev->mac, OFP_ETHER_ADDR_LEN);
tmp.op = odp_cpu_to_be_16(OFP_ARPOP_REPLY);
*arp = tmp;
if (vlan) {
memcpy(tmp_eth_vlan.evl_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth_vlan.evl_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth_vlan = tmp_eth_vlan;
} else {
memcpy(tmp_eth.ether_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth.ether_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth = tmp_eth;
}
if (odp_unlikely(!PHYS_PORT(dev->port))) {
switch (dev->port) {
case GRE_PORTS:
/* Never happens. */
break;
case VXLAN_PORTS: {
/* Restore the original vxlan header and
update the addresses */
ofp_vxlan_restore_and_update_header
(pkt, outdev, inner_from_mac);
break;
}
} /* switch */
} /* not phys port */
return send_pkt_out(outdev, pkt);
}
return OFP_PKT_CONTINUE;
}
