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Date:	Tue, 18 Dec 2007 15:57:54 -0500
From:	Brian Haley <>
To:	David Miller <>,
	YOSHIFUJI Hideaki <>,
	David Stevens <>
Cc:	"" <>
Subject: [PATCH] [IPv6]: IPV6_MULTICAST_IF setting is ignored on link-local

Trying to connect() to an IPv6 link-local multicast address by
specifying the outgoing multicast interface doesn't work, you have to
bind to a device first with an SO_BINDTODEVICE setsockopt() call.  This
patch allows the IPV6_MULTICAST_IF setting to also control which
interface should be used for the connection, as specified in RFC 3493.

Signed-off-by: Brian Haley <>

View attachment "mcast_oif.patch" of type "text/x-patch" (645 bytes)

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