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Tuned keepalive parameters

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As seen here:
http://stackoverflow.com/questions/10445122/qtcpsocket-state-always-connected-even-unplugging-ethernet-wire
This commit is contained in:
Albert Vaca 2013-08-29 03:48:49 +02:00
parent a6216e8a6c
commit f340c0ca9f
1 changed files with 18 additions and 0 deletions
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18
daemon/devicelinks/landevicelink.cpp
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@ -20,6 +20,10 @@
#include "landevicelink.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include "linkproviders/linkprovider.h"
#include "networkpackage.h"
@ -27,6 +31,20 @@ LanDeviceLink::LanDeviceLink(const QString& d, LinkProvider* a, QTcpSocket* sock
: DeviceLink(d, a)
{
mSocket = socket;
int fd = socket->socketDescriptor();
int enableKeepAlive = 1;
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &enableKeepAlive, sizeof(enableKeepAlive));
int maxIdle = 60; /* seconds */
setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &maxIdle, sizeof(maxIdle));
int count = 3; // send up to 3 keepalive packets out, then disconnect if no response
setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &count, sizeof(count));
int interval = 5; // send a keepalive packet out every 2 seconds (after the 5 second idle period)
setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &interval, sizeof(interval));
connect(mSocket, SIGNAL(disconnected()),
this, SLOT(deleteLater()));
connect(mSocket, SIGNAL(readyRead()),