//-----------------------------------------------------------------------------
void
rlc_am_reestablish(
const protocol_ctxt_t* const ctxt_pP,
rlc_am_entity_t* const rlc_pP)
//-----------------------------------------------------------------------------
{
/*
* RLC re-establishment is performed upon request by RRC, and the function
* is applicable for AM, UM and TM RLC entities.
* When RRC indicates that an RLC entity should be re-established, the RLC entity shall:
* - if it is an AM RLC entity:
* - when possible, reassemble RLC SDUs from any byte segments of AMD PDUs with SN < VR(MR) in the
* receiving side, remove RLC headers when doing so and deliver all reassembled RLC SDUs to upper layer in
* ascending order of the RLC SN, if not delivered before;
* - discard the remaining AMD PDUs and byte segments of AMD PDUs in the receiving side;
* - discard all RLC SDUs and AMD PDUs in the transmitting side;
* - discard all RLC control PDUs.
* - stop and reset all timers;
* - reset all state variables to their initial values.
*/
LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[AM REESTABLISH] RE-INIT STATE VARIABLES, BUFFERS, LISTS\n",
PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP));
#warning TODO when possible reassemble RLC SDUs from any byte segments of AMD PDUs with SN inf VR(MR)
list2_free(&rlc_pP->receiver_buffer);
list_free(&rlc_pP->pdus_to_mac_layer);
list_free(&rlc_pP->control_pdu_list);
list_free(&rlc_pP->segmentation_pdu_list);
// TX state variables
rlc_pP->vt_a = 0;
rlc_pP->vt_ms = rlc_pP->vt_a + RLC_AM_WINDOW_SIZE;
rlc_pP->vt_s = 0;
rlc_pP->poll_sn = 0;
// TX counters
rlc_pP->c_pdu_without_poll = 0;
rlc_pP->c_byte_without_poll = 0;
// RX state variables
rlc_pP->vr_r = 0;
rlc_pP->vr_mr = rlc_pP->vr_r + RLC_AM_WINDOW_SIZE;
rlc_pP->vr_x = 0;
rlc_pP->vr_ms = 0;
rlc_pP->vr_h = 0;
rlc_pP->last_frame_status_indication = 123456; // any value > 1
rlc_pP->first_retrans_pdu_sn = -1;
rlc_pP->initialized = TRUE;
}
//-----------------------------------------------------------------------------
void
rlc_am_cleanup(
rlc_am_entity_t* const rlc_pP
)
//-----------------------------------------------------------------------------
{
list2_free(&rlc_pP->receiver_buffer);
list_free(&rlc_pP->pdus_to_mac_layer);
list_free(&rlc_pP->control_pdu_list);
list_free(&rlc_pP->segmentation_pdu_list);
if (rlc_pP->output_sdu_in_construction != NULL) {
free_mem_block(rlc_pP->output_sdu_in_construction);
rlc_pP->output_sdu_in_construction = NULL;
}
unsigned int i;
if (rlc_pP->input_sdus != NULL) {
for (i=0; i < RLC_AM_SDU_CONTROL_BUFFER_SIZE; i++) {
if (rlc_pP->input_sdus[i].mem_block != NULL) {
free_mem_block(rlc_pP->input_sdus[i].mem_block);
rlc_pP->input_sdus[i].mem_block = NULL;
}
}
free(rlc_pP->input_sdus);
rlc_pP->input_sdus = NULL;
}
pthread_mutex_destroy(&rlc_pP->lock_input_sdus);
if (rlc_pP->pdu_retrans_buffer != NULL) {
for (i=0; i < RLC_AM_PDU_RETRANSMISSION_BUFFER_SIZE; i++) {
if (rlc_pP->pdu_retrans_buffer[i].mem_block != NULL) {
free_mem_block(rlc_pP->pdu_retrans_buffer[i].mem_block);
rlc_pP->pdu_retrans_buffer[i].mem_block = NULL;
}
}
free(rlc_pP->pdu_retrans_buffer);
rlc_pP->pdu_retrans_buffer = NULL;
}
memset(rlc_pP, 0, sizeof(rlc_am_entity_t));
}
//-----------------------------------------------------------------------------
void
umts_stop_all_timers (list2_t * atimer_listP)
{
//-----------------------------------------------------------------------------
list2_free (atimer_listP);
}
