net: ip: igmp: add igmpv3 support

Added igmpv3 support based on the already existing structure for igmpv2.
The already existing api is not modified to prevent breaking exisiting
applications.

Signed-off-by: Ibe Van de Veire <ibe.vandeveire@basalte.be>

include/zephyr/net/igmp.h

@@ -27,29 +27,37 @@
 extern "C" {
 #endif
 
+struct igmp_param {
+	bool include;                /* Source list filter type */
+	struct in_addr *source_list; /* List of sources to include or exclude */
+	size_t sources_len;          /* Length of source list */
+};
+
 /**
  * @brief Join a given multicast group.
  *
  * @param iface Network interface where join message is sent
  * @param addr Multicast group to join
+ * @param param Optional parameters
  *
  * @return Return 0 if joining was done, <0 otherwise.
  */
 #if defined(CONFIG_NET_IPV4_IGMP)
-int net_ipv4_igmp_join(struct net_if *iface, const struct in_addr *addr);
+int net_ipv4_igmp_join(struct net_if *iface, const struct in_addr *addr, struct igmp_param *param);
 #else
-static inline int net_ipv4_igmp_join(struct net_if *iface,
-				     const struct in_addr *addr)
+static inline int net_ipv4_igmp_join(struct net_if *iface, const struct in_addr *addr,
+				     struct igmp_param *param)
 {
 	ARG_UNUSED(iface);
 	ARG_UNUSED(addr);
+	ARG_UNUSED(param);
 
 	return -ENOSYS;
 }
 #endif
 
 /**
- * @brief Leave a given multicast group.
+ * @brief Leave a given multicast.
  *
  * @param iface Network interface where leave message is sent
  * @param addr Multicast group to leave

include/zephyr/net/net_if.h

@@ -101,6 +101,17 @@ struct net_if_mcast_addr {
 	uint8_t is_joined : 1;
 
 	uint8_t _unused : 6;
+
+#if defined(CONFIG_NET_IPV4_IGMPV3)
+	/** Filter mode (used in IGMPV3)*/
+	uint8_t record_type;
+
+	/** Number of sources to be used by the filter*/
+	uint16_t sources_len;
+
+	/** Sources to filter on*/
+	struct net_addr sources[CONFIG_NET_IF_MCAST_IPV4_SOURCE_COUNT];
+#endif
 };
 
 /**

subsys/net/ip/Kconfig.ipv4

@@ -37,6 +37,10 @@ config NET_IF_MCAST_IPV4_ADDR_COUNT
 	default 2 if NET_IPV4_IGMP
 	default 1
 
+config NET_IF_MCAST_IPV4_SOURCE_COUNT
+	int "Max number of IPv4 sources per mcast address to be included or excluded"
+	default 1
+
 config NET_ICMPV4_ACCEPT_BROADCAST
 	bool "Accept broadcast ICMPv4 echo-request"
 	help