FAQ-0793 How do I set a route for a socket connection?


FAQ-0793 How do I set a route for a socket connection?

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Classification:	C++	Category:	Comms
Created:	05/15/2002	Modified:	06/11/2002
Number:	FAQ-0793
Platform:	Symbian OS v6.0, Symbian OS v6.1

Question:
How do I set a route for a socket connection?

Answer:
You can use the following approach:

#define IPADDR(a,b,c,d) (TUint32)(((a)<<24)|((b)<<16)|((c)<<8)|(d))

TInt SetRoute(RSocket& aSocket, TInt aOp, TUint32 aDest, TUint32 aNetMask, TUint32 aGateway, TUint32 aInterface, TInt aMetric)

{
TPckgBuf info;
info().iDstAddr.SetAddress(aDest);
info().iNetMask.SetAddress(aNetMask);
info().iGateway.SetAddress(aGateway);
info().iIfAddr.SetAddress(aInterface);
info().iMetric = aMetric;
return aSocket.SetOpt(aOp, KSolInetRtCtrl, info);
//const TInt KSoInetAddRoute = 0x223;
//const TInt KSoInetDeleteRoute = 0x224;
//const TInt KSoInetChangeRoute = 0x225;
}
TInt StartSocketWithRoute(TUint32 addr)

{
RSocketServ socketServ;
RSocket sock;
User::LeaveIfError(sock.Open(socketServ, KAfInet, KSockStream, KProtocolInetTcp));
TInt ret = SetRoute(sock, KSoInetAddRoute, addr, IPADDR(255,255,255,0),
IPADDR(127,0,0,1), IPADDR(0,0,0,0), 0);
// do something useful with the socket
return ret;
}