Date: Fri, 5 Jul 2002 00:42:52 +0200 From: "Daan Vreeken [PA4DAN]" <Danovitsch@Danovitsch.dnsq.org> To: FreeBSD-Questions@FreeBSD.org Subject: Re: ICMP Message-ID: <02070500425202.00991@FreeBSD.Danovitsch.LAN>
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On Thursday 04 July 2002 01:52, you wrote: > Hi all > > The really should be a FreeBSD-Programmer@FreeBSD.org, but never mind > > :-) > > I have been playing with socket programming for some time now and have > moved on to raw sockets. (I don't use libnet or libpcap, because I first > want to learn it from the bottom). > I know how to send ICMP packets, but how do I receive? I can "take over" > the hole networkcard and read all packets, but I just want the ones for > my connection. If I set up a raw socket and send an ICMP I can get the > response (because the ICMP have an ID-feild?), but that if I have setup > a SOCK_STREAM or SOCK_DGRAM? How can I then detect ICMP? Have you looked at how they do it in the "ping" program? ( see /usr/src/sbin/ping/ping.c ) grtz, Daan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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