//-----------------------------------------------------------------------------
struct mac_data_req
rlc_am_mac_data_request (void *rlcP)
{
//-----------------------------------------------------------------------------
struct mac_data_req data_req;
mem_block_t *pdu;
signed int nb_pdu_to_transmit = ((struct rlc_am_entity *) rlcP)->nb_pdu_requested_by_mac_on_ch1 ;
//rlc_am_get_pdus (rlcP, RLC_AM_TRAFFIC_ALLOWED_FOR_STATUS | RLC_AM_TRAFFIC_ALLOWED_FOR_DATA);
rlc_am_get_pdus (rlcP, RLC_AM_TRAFFIC_ALLOWED_FOR_DATA);
list_init (&data_req.data, NULL);
//list_add_list (&((struct rlc_am_entity *) rlcP)->pdus_to_mac_layer_ch1, &data_req.data);
while (nb_pdu_to_transmit > 0 ) {
pdu = list_remove_head (&((struct rlc_am_entity *) rlcP)->pdus_to_mac_layer_ch1);
if (pdu != null) {
list_add_tail_eurecom (pdu, &data_req.data);
} else {
//msg ("[RLC_AM][RB %d] WARNING MAC_DATA_REQUEST CANNOT GIVE A PDU REQUESTED BY MAC\n", ((struct rlc_am_entity *) rlcP)->rb_id);
}
nb_pdu_to_transmit = nb_pdu_to_transmit - 1;
}
//list_add_list (&((struct rlc_am_entity *) rlcP)->pdus_to_mac_layer_ch2, &data_req.data);
#ifdef DEBUG_RLC_AM_TX
msg ("[RLC_AM][RB %d] MAC_DATA_REQUEST %d TBs (REQUESTED %d) Frame %d\n", ((struct rlc_am_entity *) rlcP)->rb_id, data_req.data.nb_elements, ((struct rlc_am_entity *) rlcP)->nb_pdu_requested_by_mac_on_ch1 , Mac_rlc_xface->frame);
#endif
data_req.buffer_occupancy_in_pdus = rlc_am_get_buffer_occupancy_in_pdus_ch1 ((struct rlc_am_entity *) rlcP);
data_req.buffer_occupancy_in_pdus += rlc_am_get_buffer_occupancy_in_pdus_ch2 ((struct rlc_am_entity *) rlcP);
data_req.buffer_occupancy_in_bytes = data_req.buffer_occupancy_in_pdus * ((struct rlc_am_entity *) rlcP)->pdu_size;
data_req.rlc_info.rlc_protocol_state = ((struct rlc_am_entity *) rlcP)->protocol_state;
return data_req;
}
//-----------------------------------------------------------------------------
struct mac_data_ind mac_rlc_deserialize_tb (
char *buffer_pP,
const tb_size_t tb_sizeP,
num_tb_t num_tbP,
crc_t *crcs_pP)
{
//-----------------------------------------------------------------------------
struct mac_data_ind data_ind;
mem_block_t* tb_p;
num_tb_t nb_tb_read;
tbs_size_t tbs_size;
nb_tb_read = 0;
tbs_size = 0;
list_init(&data_ind.data, NULL);
while (num_tbP > 0) {
tb_p = get_free_mem_block(sizeof (mac_rlc_max_rx_header_size_t) + tb_sizeP);
if (tb_p != NULL) {
((struct mac_tb_ind *) (tb_p->data))->first_bit = 0;
((struct mac_tb_ind *) (tb_p->data))->data_ptr = (uint8_t*)&tb_p->data[sizeof (mac_rlc_max_rx_header_size_t)];
((struct mac_tb_ind *) (tb_p->data))->size = tb_sizeP;
if (crcs_pP) {
((struct mac_tb_ind *) (tb_p->data))->error_indication = crcs_pP[nb_tb_read];
} else {
((struct mac_tb_ind *) (tb_p->data))->error_indication = 0;
}
memcpy(((struct mac_tb_ind *) (tb_p->data))->data_ptr, &buffer_pP[tbs_size], tb_sizeP);
#ifdef DEBUG_MAC_INTERFACE
#if defined(TRACE_RLC_PAYLOAD)
LOG_T(RLC, "[MAC-RLC] DUMP RX PDU(%d bytes):\n", tb_sizeP);
rlc_util_print_hex_octets(RLC, ((struct mac_tb_ind *) (tb_p->data))->data_ptr, tb_sizeP);
#endif
#endif
nb_tb_read = nb_tb_read + 1;
tbs_size = tbs_size + tb_sizeP;
list_add_tail_eurecom(tb_p, &data_ind.data);
}
num_tbP = num_tbP - 1;
}
data_ind.no_tb = nb_tb_read;
data_ind.tb_size = tb_sizeP << 3;
return data_ind;
}
BOOL test_pdcp_data_req(void)
{
unsigned char* pdcp_test_pdu_buffer = NULL;
unsigned char pdcp_test_pdu_buffer_size = DUMMY_BUFFER_SIZE + PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE;
unsigned int index = 0;
/*
* Create an unsigned char buffer out of mem_block_t
*/
pdcp_test_pdu_buffer = (unsigned char*) calloc(1, pdcp_test_pdu_buffer_size);
if (pdcp_test_pdu_buffer == NULL) {
msg("Cannot allocate a buffer for test!\n");
return FALSE;
}
/*
* Ask PDCP to handle a number of data requests
*/
for (index = 0; index < NUMBER_OF_TEST_PACKETS; ++index) {
msg("\n\nAsking PDCP to send %d/%d SDU...\n", index+1, NUMBER_OF_TEST_PACKETS);
/*
* Reset test pdu buffer for every run
*/
memset(pdcp_test_pdu_buffer, 0x00, pdcp_test_pdu_buffer_size);
/*
* Ask PDCP to create a PDU with given buffer and enqueue it to `test_pdu_tx_list`
*/
if (pdcp_data_req(0, 0, 10, DUMMY_BUFFER, &pdcp_array[0], &test_pdu_tx_list) == TRUE) {
msg("[TEST] Starting to dissect PDU created by PDCP...\n");
/*
* XXX mem_block_t doesn't hold buffer size, how do we keep the size
* information if we pass mem_block_ts via a linked list?
*/
#if 0
if (pdcp_test_pdu_buffer_size == 0 || pdcp_test_pdu_buffer == NULL) {
msg("[TEST] PDU created by pdcp_data_req() is invalid!\n");
return FALSE;
}
#endif
/*
* Serialize incoming mem_block_t into an unsigned character array
* and add removed PDU to RX list in order to use it in the next test
* (test_pdcp_data_ind())
*/
mem_block_t* pdcp_test_pdu = list_remove_head(&test_pdu_tx_list);
memcpy(pdcp_test_pdu_buffer, pdcp_test_pdu->data, pdcp_test_pdu_buffer_size);
list_add_tail_eurecom(pdcp_test_pdu, &test_pdu_rx_list);
/*
* Verify that this is a data packet by checking
* if the first bit is 0x00 (PDCP_DATA_PDU)
*/
if (pdcp_test_pdu_buffer[0] & 0x80) {
msg("[TEST] First bit is not 0, which means this is not a Data PDU!\n");
return FALSE;
} else {
msg("[TEST] First bit is 0 so this is a Data PDU, OK\n");
}
/*
* Verify that all three reserved bits are 0
*/
if ((pdcp_test_pdu_buffer[0] & 0x70) != 0) {
msg("[TEST] Reserved bits are not 0!\n");
return FALSE;
} else {
msg("[TEST] Reserved bits are all 0, OK\n");
}
/*
* Parse and verify sequence number
*/
u16 sequence_number = pdcp_get_sequence_number_of_pdu_with_long_sn(pdcp_test_pdu_buffer);
msg("[TEST] Parsed sequence number is %04d\n", sequence_number);
if (sequence_number != index % WINDOW_SIZE) {
msg("[TEST] Sequence numbers are out-of-order!\n");
return FALSE;
} else {
msg("[TEST] Sequence number is correct\n");
}
} else {
msg("[TEST] pdcp_data_req() returned FALSE!\n");
return FALSE;
}
}
return TRUE;
}
BOOL pdcp_data_req(module_id_t module_id, u32_t frame, u8_t eNB_flag, rb_id_t rab_id, sdu_size_t sdu_buffer_size, \
unsigned char* sdu_buffer)
#endif
{
//-----------------------------------------------------------------------------
#ifdef PDCP_UNIT_TEST
pdcp_t* pdcp = test_pdcp_entity;
#else
pdcp_t* pdcp = &pdcp_array[module_id][rab_id];
#endif
mem_block_t* pdcp_pdu = NULL;
u16 pdcp_pdu_size = sdu_buffer_size + PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE;
LOG_I(PDCP, "Data request notification for PDCP entity with module ID %d and radio bearer ID %d pdu size %d\n", module_id, rab_id,pdcp_pdu_size);
if (sdu_buffer_size == 0) {
LOG_W(PDCP, "Handed SDU is of size 0! Ignoring...\n");
return FALSE;
}
/*
* XXX MAX_IP_PACKET_SIZE is 4096, shouldn't this be MAX SDU size, which is 8188 bytes?
*/
if (sdu_buffer_size > MAX_IP_PACKET_SIZE) {
LOG_W(PDCP, "Requested SDU size (%d) is bigger than that can be handled by PDCP!\n", sdu_buffer_size);
// XXX What does following call do?
mac_xface->macphy_exit("");
}
/*
* Allocate a new block for the new PDU (i.e. PDU header and SDU payload)
*/
LOG_D(PDCP, "Asking for a new mem_block of size %d\n", pdcp_pdu_size);
pdcp_pdu = get_free_mem_block(pdcp_pdu_size);
if (pdcp_pdu != NULL) {
/*
* Create a Data PDU with header and append data
*
* Place User Plane PDCP Data PDU header first
*/
pdcp_user_plane_data_pdu_header_with_long_sn pdu_header;
pdu_header.dc = PDCP_DATA_PDU;
pdu_header.sn = pdcp_get_next_tx_seq_number(pdcp);
/*
* Validate incoming sequence number, there might be a problem with PDCP initialization
*/
if (pdu_header.sn > pdcp_calculate_max_seq_num_for_given_size(pdcp->seq_num_size)) {
LOG_E(PDCP, "Generated sequence number (%lu) is greater than a sequence number could ever be!\n", pdu_header.sn);
LOG_E(PDCP, "There must be a problem with PDCP initialization, ignoring this PDU...\n");
free_mem_block(pdcp_pdu);
return FALSE;
}
LOG_I(PDCP, "Sequence number %d is assigned to current PDU\n", pdu_header.sn);
/*
* Fill PDU buffer with the struct's fields
*/
if (pdcp_serialize_user_plane_data_pdu_with_long_sn_buffer((unsigned char*)pdcp_pdu->data, &pdu_header) == FALSE) {
LOG_W(PDCP, "Cannot fill PDU buffer with relevant header fields!\n");
return FALSE;
}
/* Then append data... */
memcpy(&pdcp_pdu->data[PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE], sdu_buffer, sdu_buffer_size);
/* Print octets of outgoing data in hexadecimal form */
LOG_D(PDCP, "Following content will be sent over RLC (PDCP PDU header is the first two bytes)\n");
util_print_hex_octets(PDCP, (unsigned char*)pdcp_pdu->data, pdcp_pdu_size);
#ifdef PDCP_UNIT_TEST
/*
* Here we add PDU to the list and return to test code without
* handing it off to RLC
*/
list_add_tail_eurecom(pdcp_pdu, test_list);
return TRUE;
#else
/*
* Ask sublayer to transmit data and check return value
* to see if RLC succeeded
*/
rlc_op_status_t rlc_status = rlc_data_req(module_id, frame, eNB_flag, rab_id, RLC_MUI_UNDEFINED, RLC_SDU_CONFIRM_NO, pdcp_pdu_size, pdcp_pdu);
switch (rlc_status) {
case RLC_OP_STATUS_OK:
LOG_I(PDCP, "Data sending request over RLC succeeded!\n");
break;
case RLC_OP_STATUS_BAD_PARAMETER:
LOG_W(PDCP, "Data sending request over RLC failed with 'Bad Parameter' reason!\n");
return FALSE;
case RLC_OP_STATUS_INTERNAL_ERROR:
LOG_W(PDCP, "Data sending request over RLC failed with 'Internal Error' reason!\n");
return FALSE;
case RLC_OP_STATUS_OUT_OF_RESSOURCES:
LOG_W(PDCP, "Data sending request over RLC failed with 'Out of Resources' reason!\n");
return FALSE;
default:
LOG_W(PDCP, "RLC returned an unknown status code after PDCP placed the order to send some data (Status Code:%d)\n", rlc_status);
return FALSE;
}
/*
* Control arrives here only if rlc_data_req() returns RLC_OP_STATUS_OK
* so we return TRUE afterwards
*/
if (eNB_flag == 1) {
Pdcp_stats_tx[module_id][(rab_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rab_id & RAB_OFFSET)-DTCH]++;
Pdcp_stats_tx_bytes[module_id][(rab_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rab_id & RAB_OFFSET)-DTCH] += sdu_buffer_size;
} else {
