Date: Thu, 16 Aug 2001 01:08:02 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Joe Clarke <marcus@marcuscom.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Writing a packet alias translator, need help Message-ID: <3B7B7F62.70B37F2E@mindspring.com> References: <20010813124054.F13703-100000@shumai.marcuscom.com>
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Joe Clarke wrote:
>
> I'm trying to write a packet alias translator for a protocol that uses TCP
> to setup a UDP streaming session (much like the smedia driver that's
> already there). I'm having a problem getting the translated port to mesh
> with the actual port. Here's what I've done:
>
> /* msg is a TCP setup packet
> struct msg {
> u_int32_t ipAddr;
> u_int32_t portNumber;
> };
> */
One obvious thing is that ports are 16 bits, not 32.... but...
> is UDP 16704, but the translation puts 50535 in the packet.
The bit patterns these make are not even remotely similar,
meaning that this isn't a byte order issue; I think you will
need to run the code in a debugger (or add printf's).
-- Terry
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