static enum ofp_return_code ofp_ip_output_add_eth(odp_packet_t pkt,
struct ip_out *odata)
{
uint8_t l2_size = 0;
void *l2_addr;
if (!odata->gw) /* link local */
odata->gw = odata->ip->ip_dst.s_addr;
if (ETH_WITHOUT_VLAN(odata->vlan, odata->out_port))
l2_size = sizeof(struct ofp_ether_header);
else
l2_size = sizeof(struct ofp_ether_vlan_header);
if (odp_packet_l2_offset(pkt) + l2_size == odp_packet_l3_offset(pkt)) {
l2_addr = odp_packet_l2_ptr(pkt, NULL);
} else if (odp_packet_l3_offset(pkt) >= l2_size) {
odp_packet_l2_offset_set(pkt,
odp_packet_l3_offset(pkt) - l2_size);
l2_addr = odp_packet_l2_ptr(pkt, NULL);
} else {
l2_addr = odp_packet_push_head(pkt,
l2_size - odp_packet_l3_offset(pkt));
odp_packet_l2_offset_set(pkt, 0);
odp_packet_l3_offset_set(pkt, l2_size);
odp_packet_l4_offset_set(pkt, l2_size + (odata->ip->ip_hl<<2));
}
if (odp_unlikely(l2_addr == NULL)) {
OFP_DBG("l2_addr == NULL");
return OFP_PKT_DROP;
}
if (ETH_WITHOUT_VLAN(odata->vlan, odata->out_port)) {
struct ofp_ether_header *eth =
(struct ofp_ether_header *)l2_addr;
uint32_t addr = odp_be_to_cpu_32(odata->ip->ip_dst.s_addr);
if (OFP_IN_MULTICAST(addr)) {
eth->ether_dhost[0] = 0x01;
eth->ether_dhost[1] = 0x00;
eth->ether_dhost[2] = 0x5e;
eth->ether_dhost[3] = (addr >> 16) & 0x7f;
eth->ether_dhost[4] = (addr >> 8) & 0xff;
eth->ether_dhost[5] = addr & 0xff;
} else if (odata->dev_out->ip_addr == odata->ip->ip_dst.s_addr) {
odata->is_local_address = 1;
ofp_copy_mac(eth->ether_dhost, &(odata->dev_out->mac[0]));
} else if (ofp_get_mac(odata->dev_out, odata->gw, eth->ether_dhost) < 0) {
send_arp_request(odata->dev_out, odata->gw);
return ofp_arp_save_ipv4_pkt(pkt, odata->nh,
odata->gw, odata->dev_out);
}
ofp_copy_mac(eth->ether_shost, odata->dev_out->mac);
eth->ether_type = odp_cpu_to_be_16(OFP_ETHERTYPE_IP);
} else {
uint8_t *odp_packet_l2(odp_packet_t pkt)
{
const size_t offset = odp_packet_l2_offset(pkt);
if (odp_unlikely(offset == ODP_PACKET_OFFSET_INVALID))
return NULL;
return odp_packet_buf_addr(pkt) + offset;
}
static enum ofp_return_code ofp_output_ipv4_to_gre(
odp_packet_t pkt, struct ofp_ifnet *dev_gre,
uint16_t vrfid, struct ofp_nh_entry **nh_new)
{
struct ofp_ip *ip;
struct ofp_greip *greip;
uint32_t flags;
uint8_t l2_size = 0;
int32_t offset;
*nh_new = ofp_get_next_hop(vrfid, dev_gre->ip_remote, &flags);
if (*nh_new == NULL)
return OFP_PKT_DROP;
ip = odp_packet_l3_ptr(pkt, NULL);
/* Remove eth header, prepend gre + ip */
if (odp_packet_has_l2(pkt))
l2_size = odp_packet_l3_offset(pkt) - odp_packet_l2_offset(pkt);
offset = sizeof(*greip) - l2_size;
if (offset >= 0)
greip = odp_packet_push_head(pkt, offset);
else
greip = odp_packet_pull_head(pkt, -offset);
odp_packet_has_l2_set(pkt, 0);
odp_packet_l3_offset_set(pkt, 0);
if (!greip)
return OFP_PKT_DROP;
greip->gi_flags = 0;
greip->gi_ptype = odp_cpu_to_be_16(OFP_GREPROTO_IP);
greip->gi_i.ip_hl = 5;
greip->gi_i.ip_v = 4;
greip->gi_i.ip_tos = ip->ip_tos;
greip->gi_i.ip_len =
odp_cpu_to_be_16(odp_be_to_cpu_16(ip->ip_len) +
sizeof(*greip));
greip->gi_i.ip_id = ip->ip_id;
greip->gi_i.ip_off = 0;
greip->gi_i.ip_ttl = ip->ip_ttl;
greip->gi_i.ip_p = OFP_IPPROTO_GRE;
greip->gi_i.ip_sum = 0;
greip->gi_i.ip_src.s_addr = dev_gre->ip_local;
greip->gi_i.ip_dst.s_addr = dev_gre->ip_remote;
return OFP_PKT_CONTINUE;
}
