Date: Wed, 28 Nov 2007 17:17:25 +0330 From: "H.fazaeli" <fazaeli@sepehrs.com> Cc: freebsd-hackers@freebsd.org Subject: Re: how to write a raw socket server using UDP Message-ID: <474D716D.3060907@sepehrs.com> In-Reply-To: <360166.14926.qm@web45613.mail.sp1.yahoo.com> References: <360166.14926.qm@web45613.mail.sp1.yahoo.com>
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the 2 most common cause for sendto() failure on raw sockets are:
- badly initialized IP header. note that ip_len and ip_off must be in
host byte order. all other fields must be in net byte order.
- badly initialized destination address.
writing a raw socket server is not much different than other socket
servers:
s = socket(AF_INET, SOCK_RAW, 0);
if (bind(s, ...) != 0)
errx(...)
while (1)
recvfrom(s, ...)
/* recv buffer contains a packet starting with IP header */
sourav das wrote:
> hello all,
>
> i m a new comer. i wrote a raw socket client
> using setsockopt (sock, IPPROTO_IP. IPHDRINCL, ....)using UDP. ihave followed
> MS_Press network programming . it is showing 19 bytes sent successfully. when
> trying to send more than 19 bytes using sendto(sock, ...) function , it is
> showing socket error on sending. i want to know how to write a raw socket server
> program so that to catch and display the data sent by the client.
>
>
>
> thanks a lot,
>
> keep fit,
>
>
>
> regards,
>
> spike.
>
>
>
>
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