Added support of osmo_timers and osmo_gsm_timers for TBF.

gprs_rlcmac.cpp

@@ -22,7 +22,6 @@
 #include <Threads.h>
 #include <gprs_rlcmac.h>
 
-
 LLIST_HEAD(gprs_rlcmac_tbfs);
 void *rlcmac_tall_ctx;
 
@@ -89,6 +88,69 @@ static void tbf_free(struct gprs_rlcmac_tbf *tbf)
 	talloc_free(tbf);
 }
 
+
+static void tbf_timer_cb(void *_tbf)
+{
+	struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf;
+
+	tbf->num_T_exp++;
+
+	switch (tbf->T) {
+	case 1111:
+		// TODO: We should add timers for TBF.
+		break;
+	default:
+		COUT("Timer expired in unknown mode" << tbf->T);
+	}
+}
+
+static void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T,
+				unsigned int seconds)
+{
+	if (osmo_timer_pending(&tbf->timer))
+		COUT("Starting TBF timer %u while old timer %u pending" << T << tbf->T);
+	tbf->T = T;
+	tbf->num_T_exp = 0;
+
+	/* FIXME: we should do this only once ? */
+	tbf->timer.data = tbf;
+	tbf->timer.cb = &tbf_timer_cb;
+
+	osmo_timer_schedule(&tbf->timer, seconds, 0);
+}
+
+
+static void tbf_gsm_timer_cb(void *_tbf)
+{
+	struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf;
+
+	tbf->num_fT_exp++;
+
+	switch (tbf->fT) {
+	case 0:
+		// This is timer for delay RLC/MAC data sending after Downlink Immediate Assignment on CCCH.
+		gprs_rlcmac_segment_llc_pdu(tbf);
+		break;
+	default:
+		COUT("Timer expired in unknown mode" << tbf->fT);
+	}
+}
+
+static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT,
+				int frames)
+{
+	if (osmo_gsm_timer_pending(&tbf->gsm_timer))
+		COUT("Starting TBF timer %u while old timer %u pending" << fT << tbf->fT);
+	tbf->fT = fT;
+	tbf->num_fT_exp = 0;
+
+	/* FIXME: we should do this only once ? */
+	tbf->gsm_timer.data = tbf;
+	tbf->gsm_timer.cb = &tbf_gsm_timer_cb;
+
+	osmo_gsm_timer_schedule(&tbf->gsm_timer, frames);
+}
+
 void  write_packet_downlink_assignment(BitVector * dest, uint8_t tfi, uint32_t tlli)
 {
 	// TODO We should use our implementation of encode RLC/MAC Control messages.
@@ -526,13 +588,10 @@ void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf)
 
 void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf)
 {
-	
 	COUT("SEND IA Rest Octets Downlink Assignment>>>>>>>>>>>>>>>>>>");
 	BitVector ia_rest_octets_downlink_assignment(23*8);
 	ia_rest_octets_downlink_assignment.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
 	write_ia_rest_octets_downlink_assignment(&ia_rest_octets_downlink_assignment, tbf->tfi, tbf->tlli);
 	pcu_l1if_tx(&ia_rest_octets_downlink_assignment);
-	
-	usleep(500000);
-	gprs_rlcmac_segment_llc_pdu(tbf);
+	tbf_gsm_timer_start(tbf, 0, 120);
 }

gprs_rlcmac.h

@@ -22,9 +22,11 @@
 
 #include <BitVector.h>
 #include <gsm_rlcmac.h>
+#include <gsm_timer.h>
 
 extern "C" {
 #include <osmocom/core/linuxlist.h>
+#include <osmocom/core/timer.h>
 }
 
 enum gprs_rlcmac_tbf_state {
@@ -47,6 +49,14 @@ struct gprs_rlcmac_tbf {
 	uint8_t rlc_data[60];
 	uint16_t data_index;
 	uint8_t bsn;
+	
+	struct osmo_timer_list	timer;
+	unsigned int T; /* Txxxx number */
+	unsigned int num_T_exp; /* number of consecutive T expirations */
+	
+	struct osmo_gsm_timer_list	gsm_timer;
+	unsigned int fT; /* fTxxxx number */
+	unsigned int num_fT_exp; /* number of consecutive fT expirations */
 };
 
 extern struct llist_head gprs_rlcmac_tbfs;

pcu_main.cpp

@@ -21,6 +21,7 @@
 #include <Threads.h>
 #include <Sockets.h>
 #include <pcu_l1_if.h>
+#include <gsm_timer.h>
 
 // TODO: We should move this parameters to config file.
 #define SGSN_IP "127.0.0.1"
@@ -85,7 +86,7 @@ static int udp_write_cb(struct osmo_fd *ofd, struct msgb *msg)
 	int rc;
 	struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
 
-	DEBUGP(DGPRS, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_l1len(msg));
+	//DEBUGP(DGPRS, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_l1len(msg));
 
 	rc = sendto(ofd->fd, msg->l1h, msgb_l1len(msg), 0,
 			(const struct sockaddr *)&l1fh->remote_sa, l1fh->remote_sa_len);
@@ -115,6 +116,12 @@ int pcu_l1if_open()
 	l1fh->fl1h = fl1h;
 	fl1h->priv = l1fh;
 
+	struct osmo_wqueue * queue = &((l1fh->fl1h)->write_q);
+	osmo_wqueue_init(queue, 10);
+	queue->bfd.when |= BSC_FD_READ;
+	queue->bfd.data = l1fh;
+	queue->bfd.priv_nr = 0;
+
 	/* Open UDP */
 	struct osmo_wqueue *wq = &l1fh->udp_wq;
 
@@ -170,6 +177,10 @@ int main(int argc, char *argv[])
 	unsigned i = 0;
 	while (1) 
 	{
+		osmo_gsm_timers_check();
+		osmo_gsm_timers_prepare();
+		osmo_gsm_timers_update();
+
 		osmo_select_main(0);
 		if (i == 7)
 		{