int main(void)
{
RTPSession sess;
int portbase;
unsigned long destip;
int destport;
char ipstr[256];
int status;
char dummybuffer[1024];
struct timeval rttprev = {0,0},rtt,tv;
int sock1,sock2;
bool done;
fd_set fdset;
/*
First, we'll ask for the necessary information
*/
printf("Enter the local portbase\n");
scanf("%d",&portbase);
printf("\n");
printf("Enter the destination IP address\n");
scanf("%s",ipstr);
destip = inet_addr(ipstr);
if (destip == INADDR_NONE)
{
printf("Bad IP address specified\n");
return -1;
}
// The inet_addr function returns a value in network byte order, but
// we need the IP address in host byte order, so we use a call to
// ntohl
destip = ntohl(destip);
printf("Enter the destination port\n");
scanf("%d",&destport);
/*
Now, we'll create a RTP session, set the destination, send some
packets and poll for incoming data.
*/
status = sess.Create(portbase);
checkerror(status);
/* Get the sockets, so we can use them in a 'select' call */
sess.GetRTPSocket(&sock1);
sess.GetRTCPSocket(&sock2);
status = sess.AddDestination(destip,destport);
checkerror(status);
printf("Press return to quit...\n");
done = false;
while (!done)
{
/* Just send something */
status = sess.SendPacket("1234567890",10,0,false,10);
checkerror(status);
/* Wait for incoming data, or wait just one second */
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&fdset);
FD_SET(sock1,&fdset);
FD_SET(sock2,&fdset);
FD_SET(0,&fdset); // check for keypress
select(FD_SETSIZE,&fdset,NULL,NULL,&tv);
if (FD_ISSET(0,&fdset))
done = true;
/* poll for incoming data */
status = sess.PollData();
/* check incoming packets */
if (sess.GotoFirstSourceWithData())
{
do
{
RTPSourceData *srcdat;
srcdat = sess.GetCurrentSourceInfo();
srcdat->FlushPackets(); // we don't need the actual data
rtt = srcdat->INF_GetRoundTripTime();
if (rtt.tv_sec != 0 || rtt.tv_usec != 0)
{
if ((rtt.tv_sec != rttprev.tv_sec) || (rtt.tv_usec != rttprev.tv_usec))
{
double t;
t = (double)rtt.tv_sec;
t += ((double)rtt.tv_usec)/1000000.0;
t *= 1000.0; // we want milliseconds;
printf("rtt: %f ms\n",(float)t);
rttprev = rtt;
}
}
} while (sess.GotoNextSourceWithData());
}
}
return 0;
}
