rlc: Manage the received block bitmap in the ul_window

Added two methods to gprs_rlc_ul_window
* ssn() returns the starting sequence number
* update_rbb() returns an array of chars representing the state of the
  received   block bitmap. Each element is either 'I'nvalid or
  'R'eceived. The rbb is generated from v_n

rbb[63] relates to BSN ssn-1
...
rbb[0] relates to BSN ssn-64
This commit is contained in:
Daniel Willmann 2013-11-27 17:08:35 +01:00 committed by Holger Hans Peter Freyther
parent 11f2d58dbd
commit 8a31f9e016
2 changed files with 20 additions and 0 deletions

View File

@ -146,6 +146,18 @@ void gprs_rlc_v_n::reset()
memset(m_v_n, 0x0, sizeof(m_v_n));
}
/* Update the receive block bitmap */
void gprs_rlc_ul_window::update_rbb(const gprs_rlc_v_n *v_n, char *rbb)
{
int i;
for (i=0; i < ws(); i++) {
if (v_n->is_received(ssn()-1-i))
rbb[ws()-1-i] = 'R';
else
rbb[ws()-1-i] = 'I';
}
}
/* Raise V(R) to highest received sequence number not received. */
void gprs_rlc_ul_window::raise_v_r(const uint16_t bsn, gprs_rlc_v_n *v_n)
{

View File

@ -89,8 +89,11 @@ struct gprs_rlc_ul_window {
const uint16_t v_r() const;
const uint16_t v_q() const;
const uint16_t ssn() const;
bool is_in_window(uint8_t bsn) const;
void update_rbb(const gprs_rlc_v_n *v_n, char *rbb);
void raise_v_r(int moves);
void raise_v_r(const uint16_t bsn, gprs_rlc_v_n *v_n);
uint16_t raise_v_q(gprs_rlc_v_n *v_n);
@ -339,6 +342,11 @@ inline const uint16_t gprs_rlc_ul_window::v_q() const
return m_v_q;
}
inline const uint16_t gprs_rlc_ul_window::ssn() const
{
return m_v_r;
}
inline void gprs_rlc_ul_window::raise_v_r(int moves)
{
m_v_r = (m_v_r + moves) & mod_sns();