Date: Thu, 31 Aug 2000 18:46:24 -0700 From: Ivan Passos <ivan@cyclades.com> To: freebsd-questions@FreeBSD.ORG Subject: How to use a network interface in "raw" mode?? Message-ID: <39AF0A70.BB85ED78@cyclades.com>
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Hello, I have a synchronous card (which is seen as a networki interface) that can run synchronous PPP or Cisco HDLC and carries IP traffic. Now I need to implement (and that includes kernel _and_ userspace levels) support for a "raw" mode of operation. This means that the only thing that should go to the driver is _data_, no IP headers, no protocol "garbage", nothing but data. How can I do that?? Do I need to change the kernel driver, or just create a direct socket bind to the driver, bypassing the INET layer?? This would be the most intuitive way to do it, but I don't know what kind of socket I should open. If I open a PF_INET socket, that brings the INET layer into place (which I don't want). If I try to open any other socket protocol type (PF_LINK, for instance), it returns EPROTONOSUPPORT (protocol not supported). The only other protocol type that works is PF_LOCAL, and that's for host-internal operations ... As I couldn't find any documentation about or src code that does that, I'm asking about it here. Just to give a similar scenario, in Linux I'd use an PF_PACKET socket, with SOCK_RAW. Any help is highly appreciated. Thanks in advance!!! Later, Ivan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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