No error while sending via TCP Socket
grante at visi.com
Fri Jun 30 16:48:38 CEST 2006
On 2006-06-30, Martin Bürkle <buerklma at web.de> wrote:
> I have writen a programm using TCP sockets. After i get the
> connection to another socket I cut the Ethernet cable. Then I
> send a message. The program doesnt raise any exception. Can
> somebody tell me why
Because send() has successfully passed the packet to the
network stack. If you want to know whether the application on
the other end received it, you need an application-layer
protocol that acknowleges the data.
> and give me a hint how to get an exception
You can't -- unless you've enabled the keepalive option on the
TCP connection and you've waited the requisite time after the
cable is cut before sending your data (IIRC it takes a couple
hours for an idle TCP connection to time out because of a link
TCP/IP is designed to be fault-tolerant. Temporary breaks in
cables aren't supposed to cause failures.
Grant Edwards grante Yow! I feel like I'm
at in a Toilet Bowl with a
visi.com thumbtack in my forehead!!
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