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[lwip-devel] [bug #43028] IP_MULTICAST_TTL affects unicast datagrams

From: Joel Cunningham
Subject: [lwip-devel] [bug #43028] IP_MULTICAST_TTL affects unicast datagrams
Date: Fri, 05 Dec 2014 15:00:22 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0

Follow-up Comment #3, bug #43028 (project lwip):

In attached patch, I have added a multicast TTL field to the UDP PCB.  I chose
this because it follows the same path of implementation as IP_MULTICAST_IF and
can be conditionally compiled.

I thought of putting the multicast TTL in the IP PCB because TTL and multicast
are an IP layer concepts but ran into the complication where #if LWIP_IGMP
can't be used inside of the #define that declares the IP_PCB


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