Commit f1539df7 authored by Thomas Laurent's avatar Thomas Laurent
Browse files

fix UE switch from read only to R+W

parent 290ca22d
......@@ -3,6 +3,12 @@
copyleft: OpenAirInterface Software Alliance and it's licence
*/
/*
* Open issues and limitations
* The read and write should be called in the same thread, that is not new USRP UHD design
* When the opposite side switch from passive reading to active R+Write, the synchro is not fully deterministic
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
......@@ -111,7 +117,7 @@ void setblocking(int sock, enum blocking_t active) {
AssertFatal(fcntl(sock, F_SETFL, opts) >= 0, "");
}
static bool flushInput(rfsimulator_state_t *t);
static bool flushInput(rfsimulator_state_t *t, int timeout);
void fullwrite(int fd, void *_buf, ssize_t count, rfsimulator_state_t *t) {
if (t->saveIQfile != -1) {
......@@ -134,7 +140,9 @@ void fullwrite(int fd, void *_buf, ssize_t count, rfsimulator_state_t *t) {
continue;
if(errno==EAGAIN) {
flushInput(t);
// The opposite side is saturated
// we read incoming sockets meawhile waiting
flushInput(t, 5);
continue;
} else
return;
......@@ -229,14 +237,17 @@ int rfsimulator_write(openair0_device *device, openair0_timestamp timestamp, voi
lastW=timestamp;
LOG_D(HW,"sent %d samples at time: %ld->%ld, energy in first antenna: %d\n",
nsamps, timestamp, timestamp+nsamps, signal_energy(samplesVoid[0], nsamps) );
// Let's verify we don't have incoming data
// This is mandatory when the opposite side don't transmit
flushInput(t, 0);
return nsamps;
}
static bool flushInput(rfsimulator_state_t *t) {
static bool flushInput(rfsimulator_state_t *t, int timeout) {
// Process all incoming events on sockets
// store the data in lists
struct epoll_event events[FD_SETSIZE]= {0};
int nfds = epoll_wait(t->epollfd, events, FD_SETSIZE, 20);
int nfds = epoll_wait(t->epollfd, events, FD_SETSIZE, timeout);
if ( nfds==-1 ) {
if ( errno==EINTR || errno==EAGAIN )
......@@ -356,7 +367,7 @@ int rfsimulator_read(openair0_device *device, openair0_timestamp *ptimestamp, vo
if ( first_sock == FD_SETSIZE ) {
// no connected device (we are eNB, no UE is connected)
if (!flushInput(t)) {
if (!flushInput(t, 10)) {
for (int x=0; x < nbAnt; x++)
memset(samplesVoid[x],0,sampleToByte(nsamps,1));
......@@ -385,7 +396,7 @@ int rfsimulator_read(openair0_device *device, openair0_timestamp *ptimestamp, vo
ptr->lastReceivedTS,
t->nextTimestamp+nsamps);
*/
flushInput(t);
flushInput(t, 3);
} while (have_to_wait);
}
......
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