AP: Add support for multicast-to-unicast conversion for DGAF Disable

When DGAF Disable is on, perform multicast-to-unicast for DHCP packets
and Router Advertisement packets. This is a requirement for Hotspot 2.0.

Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>

src/ap/dhcp_snoop.c

@@ -128,6 +128,12 @@ static void handle_dhcp(void *ctx, const u8 *src_addr, const u8 *buf,
 		}
 		sta->ipaddr = b->your_ip;
 	}
+
+	if (hapd->conf->disable_dgaf && is_broadcast_ether_addr(buf)) {
+		for (sta = hapd->sta_list; sta; sta = sta->next)
+			x_snoop_mcast_to_ucast_convert_send(hapd, sta,
+							    (u8 *) buf, len);
+	}
 }
 
 

src/ap/ndisc_snoop.c

@@ -32,6 +32,7 @@ struct icmpv6_ndmsg {
 	u8 opt_lladdr[0];
 };
 
+#define ROUTER_ADVERTISEMENT	134
 #define NEIGHBOR_SOLICITATION	135
 #define NEIGHBOR_ADVERTISEMENT	136
 #define SOURCE_LL_ADDR		1
@@ -123,6 +124,10 @@ static void handle_ndisc(void *ctx, const u8 *src_addr, const u8 *buf,
 				return;
 		}
 		break;
+	case ROUTER_ADVERTISEMENT:
+		if (!hapd->conf->disable_dgaf)
+			return;
+		/* fall through */
 	case NEIGHBOR_ADVERTISEMENT:
 		for (sta = hapd->sta_list; sta; sta = sta->next) {
 			x_snoop_mcast_to_ucast_convert_send(hapd, sta,