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, 14 insertions, 1 deletions

diff --git a/VNFs/DPPD-PROX/prox_port_cfg.c b/VNFs/DPPD-PROX/prox_port_cfg.c
index c335ee10..ac0ba0f3 100644
--- a/VNFs/DPPD-PROX/prox_port_cfg.c
+++ b/VNFs/DPPD-PROX/prox_port_cfg.c
@@ -41,6 +41,7 @@
 #include "prox_cksum.h"
 #include "stats_irq.h"
 #include "prox_compat.h"
+#include "rte_ethdev.h"
 
 struct prox_port_cfg prox_port_cfg[PROX_MAX_PORTS];
 rte_atomic32_t lsc;
@@ -518,7 +519,7 @@ static void init_port(struct prox_port_cfg *port_cfg)
 #if RTE_VERSION >= RTE_VERSION_NUM(2,0,0,0)
 	port_cfg->port_conf.rx_adv_conf.rss_conf.rss_hf &= port_cfg->dev_info.flow_type_rss_offloads;
 #endif
-	plog_info("\t\t Enabling RSS rss_hf = 0x%lx (requested 0x%llx)\n", port_cfg->port_conf.rx_adv_conf.rss_conf.rss_hf, ETH_RSS_IP|ETH_RSS_UDP);
+	plog_info("\t\t Enabling RSS rss_hf = 0x%lx (requested 0x%llx, supported 0x%lx)\n", port_cfg->port_conf.rx_adv_conf.rss_conf.rss_hf, ETH_RSS_IP|ETH_RSS_UDP, port_cfg->dev_info.flow_type_rss_offloads);
 
 	// rxmode such as hw src strip
 #if RTE_VERSION >= RTE_VERSION_NUM(18,8,0,1)
@@ -689,6 +690,18 @@ static void init_port(struct prox_port_cfg *port_cfg)
 			}
 		}
 	}
+	if (port_cfg->nb_mc_addr) {
+		rte_eth_allmulticast_enable(port_id);
+		if ((ret = rte_eth_dev_set_mc_addr_list(port_id, port_cfg->mc_addr, port_cfg->nb_mc_addr)) != 0) {
+			plog_err("\t\trte_eth_dev_set_mc_addr_list returns %d on port %u\n", ret, port_id);
+			port_cfg->nb_mc_addr = 0;
+			rte_eth_allmulticast_disable(port_id);
+			plog_info("\t\tport %u NOT in multicast mode as failed to add mcast address\n", port_id);
+		} else {
+			plog_info("\t\trte_eth_dev_set_mc_addr_list(%d addr) on port %u\n", port_cfg->nb_mc_addr, port_id);
+			plog_info("\t\tport %u in multicast mode\n", port_id);
+		}
+	}
 }
 
 void init_port_all(void)