FIX - AsyncUDP joinMulticastGroup does not work if interface is not specified #2279
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If
joinMulticastGroup
is used with the defaulttcpip_if
ofTCPIP_ADAPTER_IF_MAX
, an ungraceful crash will occur. This modifiesjoinMulticastGroup
to utilizeigmp_joingroup
instead ofigmp_joingroup_netif
whenTCPIP_ADAPTER_IF_MAX
is passed in so that all interfaces are iterated over and joined.