>I am using Linux 2.4.2.
>I tried transferring some data over raw IPv6 sockets using sendmsg()
>and recvmsg(). Using ancillary data objects I was able to set the
>HOPLIMIT. But could not find any means of setting Flow label. I
>tried setting the flow label in the sockaddr_in6 structure which
>is pointed to by the msg_name field in the msghdr. This msghdr is
>one of the arguments to sendmsg().
>
>At the receiving end too, I access this field from the same
>sockaddr_in6 structure returned by recvmsg(). Irrespective of the
>value set at the source, at the receiving end, I always get flow
>label value: 0.
>
>Can anyone please tell me how to set flow labels at the source
>and how to access them at the destination ? The rfcs dont provide
>much information on this.
unfortunately there's no standard API for setting/receiving flow label
values. exact semantics of flow label is still being worked on at
IETF ipv6wg (ipngwg) so we cannot really define API yet.
itojun
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