static struct dp_packet_batch *
prepare_packets(size_t n, bool change, unsigned tid, ovs_be16 *dl_type)
{
struct dp_packet_batch *pkt_batch = xzalloc(sizeof *pkt_batch);
struct flow flow;
size_t i;
ovs_assert(n <= ARRAY_SIZE(pkt_batch->packets));
dp_packet_batch_init(pkt_batch);
for (i = 0; i < n; i++) {
struct udp_header *udp;
struct dp_packet *pkt = dp_packet_new(sizeof payload/2);
dp_packet_put_hex(pkt, payload, NULL);
flow_extract(pkt, &flow);
udp = dp_packet_l4(pkt);
udp->udp_src = htons(ntohs(udp->udp_src) + tid);
if (change) {
udp->udp_dst = htons(ntohs(udp->udp_dst) + i);
}
dp_packet_batch_add(pkt_batch, pkt);
*dl_type = flow.dl_type;
}
return pkt_batch;
}
/* Creates and returns a new dp_packet with an initial capacity of 'size +
* headroom' bytes, reserving the first 'headroom' bytes as headroom. */
struct dp_packet *
dp_packet_new_with_headroom(size_t size, size_t headroom)
{
struct dp_packet *b = dp_packet_new(size + headroom);
dp_packet_reserve(b, headroom);
return b;
}
