Re: [ECOS] Socket UDP

["Michele Da Meda" <dm_mic at libero dot it>]

----- Original Message ----- 
From: "Andrew Lunn" <andrew@lunn.ch>
To: "Michele Da Meda" <dm_mic@libero.it>
Cc: "ecos-discuss" <ecos-discuss@ecos.sourceware.org>
Sent: Thursday, December 01, 2005 12:28 PM
Subject: Re: [ECOS] Socket UDP


> On Thu, Dec 01, 2005 at 11:02:47AM +0100, Michele Da Meda wrote:
> > Hi all,
> >
> > my application uses UDP socket, i have a problem with SOCK_DGRAM and
> > SOCK_STREAM.
> > I make a BIND with these paramethers :
> >
> >     sin_family = AF_INET
> >     sin_addr = inet_addr("192.168.0.253")
> >     sin_port  = (unsigned short)htons(1900)
> >
> > with a socket like this :   socket(AF_INET, SOCK_DGRAM, 0);
> >
> > I read that  UDP socket not work properly, and is better use
"socketcall" ,
> > but i don't know how.
>
> The eCos TCP/IP stack does work. Sockets work as normal.
>
> Where have you read that they don't?
>
> socketcall().... Are you using the linux synthetic target?
>
>         Andrew

No, i'm not.
Well,  do you know why i receive always a RST packet after a SYN, instead
receive an ACK ?
I' ve created  a  socket  :  sock = socket(AF_INET, SOCK_STREAM, 0) , this
has been set in readset and i have been call the  Listen function  :
Listen(sock,4);
My SELECT  return always 0 .

192.168.0.87  :  browser in my intranet
192.168.0.253  :  NEC MIPS where run my ecos application

>From 192.168.0.87 i make this call from browser :
http://192.168.0.253:57005

Packet SNIFFING :
Source                   Destination
192.168.0.87        192.168.0.253        TCP    4134 > 57005           [SYN]
Seq=0  Ack=0   Win=64240   Len=0   MSS=1460
192.168.0.253      192.168.0.87          TCP    57005 > 4134      [RST,ACK]
Seq=0   Ack=0  Win=1024  Len=0



Michele


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