diff options
Diffstat (limited to 'src/tbf_dl.cpp')
| -rw-r--r-- | src/tbf_dl.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/tbf_dl.cpp b/src/tbf_dl.cpp index c9ad058c..0630ba17 100644 --- a/src/tbf_dl.cpp +++ b/src/tbf_dl.cpp @@ -484,6 +484,11 @@ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( len = m_rlc.block(index)->len; rh = (struct rlc_dl_header *)data; + /* If the TBF has just started, relate frames_since_last_poll to the + * current fn */ + if (m_last_dl_poll_fn < 0) + m_last_dl_poll_fn = fn; + need_poll = state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); /* Clear Polling, if still set in history buffer */ rh->s_p = 0; @@ -538,6 +543,8 @@ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( /* set polling in header */ rh->rrbp = 0; /* N+13 */ rh->s_p = 1; /* Polling */ + + m_last_dl_poll_fn = poll_fn; } } @@ -730,3 +737,17 @@ bool gprs_rlcmac_dl_tbf::have_data() const { return m_llc.chunk_size() > 0 || !llist_empty(&m_llc.queue); } + +int gprs_rlcmac_dl_tbf::frames_since_last_poll(unsigned fn) const +{ + unsigned wrapped; + if (m_last_dl_poll_fn < 0) + return -1; + + wrapped = (fn + 2715648 - m_last_dl_poll_fn) % 2715648; + if (wrapped < 2715648/2) + return wrapped; + else + return wrapped - 2715648; +} + |