rlc/tbf: Add function receive_bsn that updates v_r, v_q, v_n

We don't need to expose the mecanics of updating the variables to the
outside.

3 files changed, 12 insertions, 4 deletions

diff --git a/src/rlc.cpp b/src/rlc.cpp
index 90944659..f3a25b23 100644
--- a/src/rlc.cpp
+++ b/src/rlc.cpp
@@ -197,3 +197,11 @@ uint16_t gprs_rlc_ul_window::raise_v_q()
 
 	return count;
 }
+
+uint16_t gprs_rlc_ul_window::receive_bsn(const uint16_t bsn)
+{
+	m_v_n.mark_received(bsn);
+	raise_v_r(bsn);
+
+	return raise_v_q();
+}
diff --git a/src/rlc.h b/src/rlc.h
index 42ec6edd..158ec3de 100644
--- a/src/rlc.h
+++ b/src/rlc.h
@@ -115,6 +115,8 @@ struct gprs_rlc_ul_window {
 
 	void raise_v_q(int);
 
+	uint16_t receive_bsn(const uint16_t bsn);
+
 	uint16_t m_v_r;	/* receive state */
 	uint16_t m_v_q;	/* receive window state */
 
diff --git a/src/tbf.cpp b/src/tbf.cpp
index 9276c416..6b0e779a 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -1606,14 +1606,12 @@ int gprs_rlcmac_tbf::rcv_data_block_acknowledged(const uint8_t *data, size_t len
 		rh->bsn, dir.ul.window.v_q(),
 		(dir.ul.window.v_q() + ws - 1) & mod_sns);
 
-	dir.ul.window.m_v_n.mark_received(rh->bsn);
-	dir.ul.window.raise_v_r(rh->bsn);
-
 	/* Raise V(Q) if possible, and retrieve LLC frames from blocks.
 	 * This is looped until there is a gap (non received block) or
 	 * the window is empty.*/
 	const uint16_t v_q_beg = dir.ul.window.v_q();
-	const uint16_t count = dir.ul.window.raise_v_q();
+
+	const uint16_t count = dir.ul.window.receive_bsn(rh->bsn);
 
 	/* Retrieve LLC frames from blocks that are ready */
 	for (uint16_t i = 0; i < count; ++i) {