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From: | Joel Cunningham |
Subject: | [lwip-devel] [bug #49662] UDP layer should filter incoming multicast datagrams against the bound IP address |
Date: | Wed, 23 Nov 2016 15:03:25 +0000 (UTC) |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0 |
Follow-up Comment #4, bug #49662 (project lwip): I agree with David's comment. The BSD socket semantics allows receiving multicast if the socket is bound to IP_ADDR_ANY or the multicast group (assuming IP membership has been added on the socket as well). Being able to receive multicast when bound to an interface IP is not BSD semantics (strangely multicast receive works in Winsock this way) I think LwIP code allows binding to a multicast group because when comparing pcb->local_ip with ip_current_dest_addr(), local_ip should be the multicast group _______________________________________________________ Reply to this item at: <http://savannah.nongnu.org/bugs/?49662> _______________________________________________ Message sent via/by Savannah http://savannah.nongnu.org/
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