int
innitialize_generator_packet(struct pkt_details *state, struct traf_gen_det *det) {
state->data = (void *)malloc(det->pkt_size);
state->data_len = det->pkt_size;
bzero((void *)state->data, state->data_len);
if(state->data_len < sizeof(struct ether_vlan_header) + sizeof(struct iphdr) + sizeof(struct tcphdr)) {
printf("packet size is too small\n");
return 0;
}
//ethernet header with default values
state->eth_vlan = (struct ether_vlan_header *) state->data;
state->eth = (struct ether_header *) state->data;
read_mac_addr(state->eth_vlan->ether_dhost, det->mac_dst);
read_mac_addr(state->eth_vlan->ether_shost, det->mac_src);
if(det->vlan != 0 && det->vlan != 0xffff) {
state->eth_vlan->tpid = htons(0x8100);
state->eth_vlan->vid = htons(det->vlan) >>4;
state->eth_vlan->ether_type = htons(ETHERTYPE_IP);
state->ip = (struct iphdr *)(state->data + sizeof(struct ether_vlan_header));
state->ip->tot_len=htons(state->data_len - sizeof(struct ether_vlan_header));
state->udp = (struct udphdr *)
(state->data + sizeof(struct ether_vlan_header) + sizeof(struct iphdr));
state->udp->len = htons(state->data_len - sizeof(struct ether_vlan_header) - sizeof(struct iphdr));
state->pktgen = (struct pktgen_hdr *)
(state->data + sizeof(struct ether_vlan_header) + sizeof(struct iphdr) + sizeof(struct udphdr));
} else {
int zd_read_mac_addr(struct zd_chip *chip, u8 *mac_addr)
{
int r;
dev_dbg_f(zd_chip_dev(chip), "\n");
mutex_lock(&chip->mutex);
r = read_mac_addr(chip, mac_addr);
mutex_unlock(&chip->mutex);
return r;
}