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    <p>From the VxWorks "Library Reference" manual (can be download):</p> <p><strong>OPTIONS FOR STREAM SOCKETS</strong></p> <p>The following sections discuss the socket options available for stream (TCP) sockets.</p> <p><strong>SO_KEEPALIVE</strong> -- Detecting a Dead Connection</p> <p>Specify the SO_KEEPALIVE option to make the transport protocol (TCP) initiate a timer to detect a dead connection:</p> <pre><code> setsockopt (sock, SOL_SOCKET, SO_KEEPALIVE, &amp;optval, sizeof (optval)); </code></pre> <p>This prevents an application from hanging on an invalid connection. The value at optval for this option is an integer (type int), either 1 (on) or 0 (off). The integrity of a connection is verified by transmitting zero-length TCP segments triggered by a timer, to force a response from a peer node. If the peer does not respond after repeated transmissions of the <strong>KEEPALIVE</strong> segments, the connection is dropped, all protocol data structures are reclaimed, and processes sleeping on the connection are awakened with an <strong>ETIMEDOUT</strong> error.</p> <p>The <strong>ETIMEDOUT</strong> timeout can happen in two ways. If the connection is not yet established, the <strong>KEEPALIVE</strong> timer expires after idling for <strong>TCPTV_KEEP_INIT</strong>. If the connection is established, the KEEPALIVE timer starts up when there is no traffic for <strong>TCPTV_KEEP_IDLE</strong>. If no response is received from the peer after sending the <strong>KEEPALIVE</strong> segment <strong>TCPTV_KEEPCNT</strong> times with interval <strong>TCPTV_KEEPINTVL</strong>, TCP assumes that the connection is invalid. The parameters <strong>TCPTV_KEEP_INIT</strong>, <strong>TCPTV_KEEP_IDLE</strong>, <strong>TCPTV_KEEPCNT</strong>, and <strong>TCPTV_KEEPINTVL</strong> are defined in the file target/h/net/tcp_timer.h.</p>
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    1. POHow to set keepalive option for induvidual socket in VxWorks
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    1. USJayG
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    1. POHow to set keepalive option for induvidual socket in VxWorks
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    1. COIs it possible to set the timer value (KEEP ALIVE TIMER) for individual socket? Kind share the vxWorks "Library Reference" manual link.
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    2. COGoogle says: http://tid.uio.no/kurs/fys4220/docs/vxworks/ref/libIndex.html
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