Patch draft to make mTCP+DPDK work in vlan tagged network

Here is a patch idea draft to make mTCP + DPDK work in vlan tagged environment,  the next thing is to figure out how to run mTCP + DPDK in vlan tagged VMware ESXi environment, which would be great to run mTCP + DPDK in VMware ESXi VM and easy to clone the VM for everybody need it

 diff --git a/mtcp/src/dpdk_module.c b/mtcp/src/dpdk_module.c  

 index 33d349e..3c08e25 100644
 --- a/mtcp/src/dpdk_module.c
 +++ b/mtcp/src/dpdk_module.c
 @@ -66,7 +66,7 @@ static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
  /* packet memory pools for storing packet bufs */
  static struct rte_mempool *pktmbuf_pool[MAX_CPUS] = {NULL};
 -//#define DEBUG                1
 +#define DEBUG             1
  #ifdef DEBUG
  /* ethernet addresses of ports */
  static struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
 @@ -79,7 +79,8 @@ static struct rte_eth_conf port_conf = {
         .split_hdr_size =    0,
         .header_split  =    0, /**< Header Split disabled */
         .hw_ip_checksum =    1, /**< IP checksum offload enabled */
 -        .hw_vlan_filter =    0, /**< VLAN filtering disabled */
 +        .hw_vlan_filter =    1, /**< VLAN filtering disabled */
 +        .hw_vlan_strip =    1, /**< VLAN strip enabled */
         .jumbo_frame  =    0, /**< Jumbo Frame Support disabled */
         .hw_strip_crc  =    1, /**< CRC stripped by hardware */
     },
 @@ -127,6 +128,7 @@ static const struct rte_eth_txconf tx_conf = {
     .txq_flags =          0x0,
  };
 +
  struct mbuf_table {
     unsigned len; /* length of queued packets */
     struct rte_mbuf *m_table[MAX_PKT_BURST];
 @@ -266,6 +268,8 @@ dpdk_send_pkts(struct mtcp_thread_context *ctxt, int nif)
                       ctxt->cpu, i, nif);
                 exit(EXIT_FAILURE);
             }
 +            dpc->wmbufs[nif].m_table[i]->ol_flags = PKT_TX_VLAN_PKT;
 +            dpc->wmbufs[nif].m_table[i]->vlan_tci = 4094;
         }
         /* reset the len of mbufs var after flushing of packets */
         dpc->wmbufs[nif].len = 0;
 @@ -534,6 +538,12 @@ dpdk_load_module(void)
             if (ret < 0)
                 rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
                      ret, (unsigned) portid);
 +
 +            ret = rte_eth_dev_vlan_filter(portid, 4094, 1);
 +
 +            if (ret < 0)
 +                rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
 +                    ret, (unsigned) portid);
             /* init one RX queue per CPU */
             fflush(stdout);