IP_RECVTOS

[Michael Tuexen]

Dear all,

there is currently no way to receive the TOS byte of a received UDP/IPv4 packet.
The attached patch adds a socket option (IP_RECVTOS) which you can use
to get a cmsg of type (IP_RECVTOS) which contains the TOS byte. Much like
IP_RECVTTL does for TTL. Any comments/objections? If there are none, I would
like to commit this to head soon.

Best regards
Michael

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