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Problems with ppp and Windows
- From: Øyvind Harboe <oyvind dot harboe at zylin dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: Thu, 22 Apr 2004 14:37:34 +0200
- Subject: [ECOS] Problems with ppp and Windows
- Organization: Zylin AS
I've run out of food and drink. This will be my last note in my log :-)
- the problem is that accept() in the attached application does not wake
up until I kill the telnet process. I'm pretty confident that this app
is correct, because it works when I compile and runit from CygWin.
- Debugging TCP/IP is really difficult without an in depth knowledge of
TCP/IP and the freebsd stack. However, I believe that accept() should be
awoken by the invocation of soisconnected() from tcp_input.c since this
is what happens when I kill the windows telnet process. I don't know
what the significance, if any, it is that TCPOPT_CC is not received and
hence a "3 way handshake" is to be used instead.
- As near as I can tell, Windows believes it is connected, because I
receive packets in my eCos application for the text I typed into the
telnet session before I kill the telnet process.
- I've submitted various patches lately in this regard, but nothing
earthshattering.
Attached: echo.c CygWin/Linux echo app. Same code gets stuck on accept()
w/PPP, Windows PPP server when running under eCos.
--
Øyvind Harboe
http://www.zylin.com
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <string.h>
int main()
{
int sd, sd_current;
struct sockaddr_in sin;
struct sockaddr_in pin;
/* get an internet domain socket */
if ((sd = socket(AF_INET, SOCK_STREAM, 0)) != -1)
{
/* complete the socket structure */
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons(23);
/* bind the socket to the port number */
if (bind(sd, (struct sockaddr *) &sin, sizeof(sin)) != -1)
{
/* show that we are willing to listen */
if (listen(sd, SOMAXCONN) != -1)
{
/* wait for a client to talk to us */
socklen_t addrlen = sizeof(pin);
if ((sd_current = accept(sd, (struct sockaddr *) &pin, &addrlen)) != -1)
{
for (;;)
{
/* get a message from the client */
char dir[10];
int len;
len=recv(sd_current, dir, sizeof(dir), 0);
if (len == -1)
{
break;
}
/* acknowledge the message, reply w/ the file names */
if (send(sd_current, dir, len, 0) != len)
{
break;
}
}
/* close up both sockets */
close(sd_current);
}
}
}
close(sd);
}
return 0;
}
--
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