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Holger Hans Peter Freyther holger at freyther.deOn Mon, Jan 14, 2013 at 12:25:37AM +0100, Pablo Neira Ayuso wrote: Hi, this appears to be only half of the fix. > - hints.ai_socktype = type; > - hints.ai_flags = 0; > - hints.ai_protocol = proto; > + if (type == SOCK_RAW) { > + /* Workaround for glibc, that returns EAI_SERVICE (-8) if > + * SOCK_RAW and IPPROTO_GRE is used. > + */ > + hints.ai_socktype = SOCK_DGRAM; > + hints.ai_protocol = IPPROTO_UDP; > + } else { > + hints.ai_socktype = type; > + hints.ai_protocol = proto; > + } now rp->ai_socktype will be SOCK_DGRAM and rp->ai_protocol UDP. So the 'raw' socket for GRE will be a datagram socket for UDP. E.g. you need the second hunk from my workaround[1]. I just wondered if you could think about a better way (one that can be easily dumped or ifdefed without putting the special case in the middle). holger [1] https://build.opensuse.org/package/view_file?expand=1&file=raw-socket.patch&package=libosmocore&project=home%3Azecke23