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-rw-r--r--src/gprs_rlcmac_data.cpp144
1 files changed, 0 insertions, 144 deletions
diff --git a/src/gprs_rlcmac_data.cpp b/src/gprs_rlcmac_data.cpp
index aa5bfda..18a037a 100644
--- a/src/gprs_rlcmac_data.cpp
+++ b/src/gprs_rlcmac_data.cpp
@@ -368,147 +368,3 @@ tx_block:
return dl_msg;
}
-int gprs_rlcmac_downlink_ack(
- struct gprs_rlcmac_tbf *tbf, uint8_t final,
- uint8_t ssn, uint8_t *rbb)
-{
- char show_rbb[65], show_v_b[RLC_MAX_SNS + 1];
- uint16_t mod_sns = tbf->sns - 1;
- uint16_t mod_sns_half = (tbf->sns >> 1) - 1;
- int i; /* must be signed */
- int16_t dist; /* must be signed */
- uint8_t bit;
- uint16_t bsn;
- struct msgb *msg;
- uint16_t lost = 0, received = 0;
-
- LOGP(DRLCMACDL, LOGL_DEBUG, "TBF=%d downlink acknowledge\n",
- tbf->tfi);
-
- if (!final) {
- /* show received array in debug (bit 64..1) */
- for (i = 63; i >= 0; i--) {
- bit = (rbb[i >> 3] >> (7 - (i&7))) & 1;
- show_rbb[i] = (bit) ? '1' : 'o';
- }
- show_rbb[64] = '\0';
- LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\""
- "(BSN=%d) 1=ACK o=NACK\n", (ssn - 64) & mod_sns,
- show_rbb, (ssn - 1) & mod_sns);
-
- /* apply received array to receive state (SSN-64..SSN-1) */
- /* calculate distance of ssn from V(S) */
- dist = (tbf->dir.dl.v_s - ssn) & mod_sns;
- /* check if distance is less than distance V(A)..V(S) */
- if (dist >= ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns)) {
- /* this might happpen, if the downlink assignment
- * was not received by ms and the ack refers
- * to previous TBF
- * FIXME: we should implement polling for
- * control ack!*/
- LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of "
- "V(A)..V(S) range (DL TBF=%d) Free TFB!\n",
- tbf->tfi);
- return 1; /* indicate to free TBF */
- }
- /* SSN - 1 is in range V(A)..V(S)-1 */
- for (i = 63, bsn = (ssn - 1) & mod_sns;
- i >= 0 && bsn != ((tbf->dir.dl.v_a - 1) & mod_sns);
- i--, bsn = (bsn - 1) & mod_sns) {
- bit = (rbb[i >> 3] >> (7 - (i&7))) & 1;
- if (bit) {
- LOGP(DRLCMACDL, LOGL_DEBUG, "- got "
- "ack for BSN=%d\n", bsn);
- if (tbf->dir.dl.v_b[bsn & mod_sns_half]
- != 'A')
- received++;
- tbf->dir.dl.v_b[bsn & mod_sns_half] = 'A';
- } else {
- LOGP(DRLCMACDL, LOGL_DEBUG, "- got "
- "NACK for BSN=%d\n", bsn);
- tbf->dir.dl.v_b[bsn & mod_sns_half] = 'N';
- lost++;
- }
- }
- /* report lost and received packets */
- gprs_rlcmac_received_lost(tbf, received, lost);
-
- /* raise V(A), if possible */
- for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s;
- i++, bsn = (bsn + 1) & mod_sns) {
- if (tbf->dir.dl.v_b[bsn & mod_sns_half] == 'A') {
- tbf->dir.dl.v_b[bsn & mod_sns_half] = 'I';
- /* mark invalid */
- tbf->dir.dl.v_a = (tbf->dir.dl.v_a + 1)
- & mod_sns;
- } else
- break;
- }
-
- /* show receive state array in debug (V(A)..V(S)-1) */
- for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s;
- i++, bsn = (bsn + 1) & mod_sns) {
- show_v_b[i] = tbf->dir.dl.v_b[bsn & mod_sns_half];
- if (show_v_b[i] == 0)
- show_v_b[i] = ' ';
- }
- show_v_b[i] = '\0';
- LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\""
- "(V(S)-1=%d) A=Acked N=Nacked U=Unacked "
- "X=Resend-Unacked\n", tbf->dir.dl.v_a, show_v_b,
- (tbf->dir.dl.v_s - 1) & mod_sns);
-
- if (tbf->state_is(GPRS_RLCMAC_FINISHED)
- && tbf->dir.dl.v_s == tbf->dir.dl.v_a) {
- LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of "
- "all blocks, but without final ack "
- "inidcation (don't worry)\n");
- }
- return 0;
- }
-
- LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n");
- debug_diagram(tbf->bts, tbf->diag, "got Final ACK");
- /* range V(A)..V(S)-1 */
- for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s;
- bsn = (bsn + 1) & mod_sns) {
- if (tbf->dir.dl.v_b[bsn & mod_sns_half] != 'A')
- received++;
- }
-
- /* report all outstanding packets as received */
- gprs_rlcmac_received_lost(tbf, received, lost);
-
- /* check for LLC PDU in the LLC Queue */
- msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx());
- if (!msg) {
- /* no message, start T3193, change state to RELEASE */
- LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we "
- "release.\n");
- /* start T3193 */
- debug_diagram(bts->bts, tbf->diag, "start T3193");
- tbf_timer_start(tbf, 3193,
- tbf->bts->bts_data()->t3193_msec / 1000,
- (tbf->bts->bts_data()->t3193_msec % 1000) * 1000);
- tbf_new_state(tbf, GPRS_RLCMAC_WAIT_RELEASE);
-
- return 0;
- }
- #warning "Copy and paste on the sender path"
- tbf->update_llc_frame(msg);
- msgb_free(msg);
-
- /* we have a message, so we trigger downlink assignment, and there
- * set the state to ASSIGN. also we set old_downlink, because we
- * re-use this tbf. */
- LOGP(DRLCMAC, LOGL_DEBUG, "Trigger dowlink assignment on PACCH, "
- "because another LLC PDU has arrived in between\n");
- memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset RLC states */
- tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; /* keep TO flags */
- tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH);
- tbf->update();
- tbf->bts->trigger_dl_ass(tbf, tbf, NULL);
- return 0;
-}
-
-