Add support for igmp and multicast

Multicast can be enabled through configuration or through command line
- Through configuration
  Add multicast=mcast_address (e.g. multicast=01:00:5e:01:02:03) in the port
  section
- Through command line
  run enable multicast port_id mcast_address (e.g. enable multicast 1 01:00:5e:01:02:03)

IGMP join message is sent unsollicited through command line:
  join igmp core_id task_id ip (e.g. join igmp 1 0 224.1.1.3)

To enable swap answering IGMP Query (w/ IGMP Join)
- Through configuration
  Add igmp ipv4=ip_address within the core/task section
- Through command line
  join igmp core_id task_id ip (e.g. join igmp 1 0 224.1.1.3)
  (this will 1st initiate an unsollicated join, then answer any subsequent query)

UDP/TCP packets received on a multicast address (224.0.0.0 => 239.255.255.255) are discarded

To stop sending responses to IGMP query:
  leave igmp core_id task_id

Change-Id: I3808ccabf3b38b5a1e10e1b044db63aa05bcd7b5
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/VNFs/DPPD-PROX/prox_port_cfg.h b/VNFs/DPPD-PROX/prox_port_cfg.h
index ccf83d6c..c025c03d 100644
--- a/VNFs/DPPD-PROX/prox_port_cfg.h
+++ b/VNFs/DPPD-PROX/prox_port_cfg.h
@@ -32,6 +32,7 @@ enum addr_type {PROX_PORT_MAC_HW, PROX_PORT_MAC_SET, PROX_PORT_MAC_RAND};
 
 #define IPV4_CKSUM	1
 #define UDP_CKSUM	2
+#define NB_MCAST_ADDR	16
 
 struct prox_port_cfg {
 	struct rte_mempool *pool[32];  /* Rx/Tx mempool */
@@ -71,6 +72,8 @@ struct prox_port_cfg {
 	} capabilities;
 	uint32_t max_rx_pkt_len;
 	uint32_t min_rx_bufsize;
+	uint32_t nb_mc_addr;
+	struct ether_addr mc_addr[NB_MCAST_ADDR];
 };
 
 extern rte_atomic32_t lsc;