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, 3 deletions

diff --git a/VNFs/DPPD-PROX/prox_args.c b/VNFs/DPPD-PROX/prox_args.c
index b99796b7..df69f979 100644
--- a/VNFs/DPPD-PROX/prox_args.c
+++ b/VNFs/DPPD-PROX/prox_args.c
@@ -534,6 +534,17 @@ static int get_port_cfg(unsigned sindex, char *str, void *data)
 		}
 		cfg->promiscuous = val;
 	}
+	else if (STR_EQ(str, "multicast")) {
+		uint32_t val;
+		if (cfg->nb_mc_addr >= NB_MCAST_ADDR) {
+			plog_err("too many multicast addresses\n");
+			return -1;
+		}
+		if (parse_mac(&cfg->mc_addr[cfg->nb_mc_addr], pkey)) {
+			return -1;
+		}
+		cfg->nb_mc_addr++ ;
+	}
 	else if (STR_EQ(str, "lsc")) {
 		cfg->lsc_set_explicitely = 1;
 		uint32_t val;
@@ -856,9 +867,6 @@ static int get_core_cfg(unsigned sindex, char *str, void *data)
 	if (STR_EQ(str, "fast path handle arp")) {
 		return parse_flag(&targ->runtime_flags, TASK_FP_HANDLE_ARP, pkey);
 	}
-	if (STR_EQ(str, "multiple arp")) {
-		return parse_flag(&targ->flags, TASK_MULTIPLE_MAC, pkey);
-	}
 
 	/* Using tx port name, only a _single_ port can be assigned to a task. */
 	if (STR_EQ(str, "tx port")) {
@@ -1356,6 +1364,9 @@ static int get_core_cfg(unsigned sindex, char *str, void *data)
 		targ->flags |= TASK_ARG_SRC_MAC_SET;
 		return 0;
 	}
+	if (STR_EQ(str, "igmp ipv4")) { /* IGMP Group */
+		return parse_ip(&targ->igmp_address, pkey);
+	}
 	if (STR_EQ(str, "gateway ipv4")) { /* Gateway IP address used when generating */
 		if ((targ->flags & TASK_ARG_L3) == 0)
 			plog_warn("gateway ipv4 configured but L3 sub mode not enabled\n");