Re: data gets corrupted (c sockets)

[David F <linux-net@xxxxxxxxxxxxxxxx>]

I had to go and open my big mouth...

Well, I could not replicate "corrupted" data at the end of the file, but 
rather "missing" data...
Delaying before closing the socket file-descriptor seems to fix it.  I 
first tried setting the SO_LINGER and TCP_LINGER2 socket-options both to 
no avail -- I don't know why but I'm sure that someone else on this list 
can supply both an explanation and also a much nicer solution; 
nonetheless, ugly though it is, this one worked for me.

-- David Favro

>From a40b0524d82aa27195f0b9bd157323bdc557745d Mon Sep 17 00:00:00 2001
From: David Favro <df-git@xxxxxxxxxxxxxxxx>
Date: Mon, 14 Jun 2010 19:30:02 -0400
Subject: [PATCH 1/5] The ugly fix.

---
 test-dude-webserver/test-webserver.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/test-dude-webserver/test-webserver.c b/test-dude-webserver/test-webserver.c
index 0462a88..f3e9734 100644
--- a/test-dude-webserver/test-webserver.c
+++ b/test-dude-webserver/test-webserver.c
@@ -7,6 +7,9 @@
 #include <string.h>
 #include <time.h>
 #include <netinet/tcp.h>
+#include <sys/ioctl.h>
+#include <asm/ioctls.h>	    // TIOCOUTQ (SIOCOUTQ)
+#include <linux/sockios.h>  // SIOCOUTQ
 
 #define ROOTPATH "/root/htmldocs" //just for testing, I'll change later
 
@@ -110,6 +113,19 @@ int main(int argc, char *argv[])
        if (sbytes != rbytes) printf("%d\n", sbytes); //just for debugging purposes
     }
     close(file);
+    for ( ; ; )
+	{
+	int value;
+	if ( ioctl(newsockfd, SIOCOUTQ, &value) < 0 )
+	    error("ioctl(SIOCOUTQ) failed");
+	if ( value > 0 )
+	    {
+	    printf( "%d bytes left to send.\n", value );
+	    sleep(1);
+	    }
+	else
+	    break;
+	}
     close(newsockfd);
      }
      return 0;
-- 
1.6.3.3