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Starting to have overflow protection in PDCP NR tx

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master
Pedro Alvarez 5 years ago committed by Andre Puschmann
parent f872c1b55a
commit 62230c6ab9
4 changed files with 91 additions and 18 deletions
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3
lib/include/srslte/upper/pdcp_entity_nr.h
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@ -99,6 +99,9 @@ private:
// Reodering callback (t-Reordering)
class reordering_callback;
std::unique_ptr<reordering_callback> reordering_fnc;
// COUNT overflow protection
bool tx_overflow = false;
};
/*

4
lib/src/upper/pdcp_entity_nr.cc
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@ -100,6 +100,10 @@ void pdcp_entity_nr::write_sdu(unique_byte_buffer_t sdu, bool blocking)
// Increment TX_NEXT
tx_next++;
if (tx_next == 0 or tx_overflow) {
tx_overflowasdfdsaf = true;
log->warning("TX_NEXT has overflowed. Droping packet\n");
}
// Check if PDCP is associated with more than on RLC entity TODO
// Write to lower layers

95
lib/test/upper/pdcp_nr_test.cc
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@ -45,9 +45,11 @@ uint8_t sdu2[] = {0xde, 0xad};
uint8_t pdu1_count0_snlen12[] = {0x80, 0x00, 0x8f, 0xe3, 0xe0, 0xdf, 0x82, 0x92};
uint8_t pdu1_count2048_snlen12[] = {0x88, 0x00, 0x8d, 0x2c, 0x47, 0x5e, 0xb1, 0x5b};
uint8_t pdu1_count4096_snlen12[] = {0x80, 0x00, 0x97, 0xbe, 0xa3, 0x32, 0xfa, 0x61};
uint8_t pdu1_count4294967295_snlen12[] = {0x80, 0x00, 0x00, 0xc2, 0x47, 0xa8, 0xdd, 0xc0, 0x73};
uint8_t pdu1_count0_snlen18[] = {0x80, 0x00, 0x00, 0x8f, 0xe3, 0xe0, 0xdf, 0x82, 0x92};
uint8_t pdu1_count131072_snlen18[] = {0x82, 0x00, 0x00, 0x15, 0x01, 0xf4, 0xb0, 0xfc, 0xc5};
uint8_t pdu1_count262144_snlen18[] = {0x80, 0x00, 0x00, 0xc2, 0x47, 0xa8, 0xdd, 0xc0, 0x73};
uint8_t pdu1_count4294967295_snlen18[] = {0x80, 0x00, 0x00, 0xc2, 0x47, 0xa8, 0xdd, 0xc0, 0x73};
// Test PDUs for rx (generated from SDU2)
uint8_t pdu7[] = {0x80, 0x01, 0x5e, 0x3d, 0x64, 0xaf, 0xac, 0x7c};
@ -60,11 +62,21 @@ struct pdcp_nr_initial_state_cfg {
uint32_t rx_reord = 0;
};
// This is the normal initial state. All state variables are set to zero
pdcp_initial_state normal_init_state = {};
// Some tests regarding COUNT wraparound take really long.
// This puts the PCDC state closer to wraparound quickly.
pdcp_initial_state near_wraparound_init_state = {
.tx_next = 4294967295, .rx_next = 4294967295, .rx_deliv = 4294967295, .rx_reord = 0};
/*
* Genric function to test transmission of in-sequence packets
*/
int test_tx(uint32_t n_packets,
const pdcp_initial_state& init_state,
uint8_t pdcp_sn_len,
uint64_t n_pdus_exp,
srslte::unique_byte_buffer_t pdu_exp,
srslte::byte_buffer_pool* pool,
srslte::log* log)
@ -92,6 +104,7 @@ int test_tx(uint32_t n_packets,
srslte::unique_byte_buffer_t pdu_act = allocate_unique_buffer(*pool);
rlc->get_last_sdu(pdu_act);
TESTASSERT(rlc->rx_count == n_pdus_exp);
TESTASSERT(compare_two_packets(pdu_act, pdu_exp) == 0);
return 0;
}
@ -265,15 +278,23 @@ int test_rx_out_of_order_timeout(uint8_t pdcp_sn_len, srslte::byte_buffer_pool*
*/
int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
{
uint64_t n_packets;
/*
* TX Test 1: PDCP Entity with SN LEN = 12
* TX_NEXT = 0.
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x80, 0x00}, Ciphered Text {0x8f, 0xe3}, MAC-I {0xe0, 0xdf, 0x82, 0x92}
*/
n_packets = 1;
srslte::unique_byte_buffer_t pdu_exp_count0_len12 = allocate_unique_buffer(*pool);
pdu_exp_count0_len12->append_bytes(pdu1_count0_snlen12, sizeof(pdu1_count0_snlen12));
TESTASSERT(test_tx(1, srslte::PDCP_SN_LEN_12, std::move(pdu_exp_count0_len12), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_12,
n_packets,
std::move(pdu_exp_count0_len12),
pool,
log) == 0);
/*
* TX Test 2: PDCP Entity with SN LEN = 12
@ -281,9 +302,16 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x88, 0x00}, Ciphered Text {0x8d, 0x2c}, MAC-I {0x47, 0x5e, 0xb1, 0x5b}
*/
n_packets = 2049;
srslte::unique_byte_buffer_t pdu_exp_count2048_len12 = allocate_unique_buffer(*pool);
pdu_exp_count2048_len12->append_bytes(pdu1_count2048_snlen12, sizeof(pdu1_count2048_snlen12));
TESTASSERT(test_tx(2049, srslte::PDCP_SN_LEN_12, std::move(pdu_exp_count2048_len12), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_12,
n_packets,
std::move(pdu_exp_count2048_len12),
pool,
log) == 0);
/*
* TX Test 3: PDCP Entity with SN LEN = 12
@ -291,9 +319,16 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x80,0x00}, Ciphered Text {0x97, 0xbe}, MAC-I {0xa3, 0x32, 0xfa, 0x61}
*/
n_packets = 4097;
srslte::unique_byte_buffer_t pdu_exp_count4096_len12 = allocate_unique_buffer(*pool);
pdu_exp_count4096_len12->append_bytes(pdu1_count4096_snlen12, sizeof(pdu1_count4096_snlen12));
TESTASSERT(test_tx(4097, srslte::PDCP_SN_LEN_12, std::move(pdu_exp_count4096_len12), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_12,
n_packets,
std::move(pdu_exp_count4096_len12),
pool,
log) == 0);
/*
* TX Test 4: PDCP Entity with SN LEN = 18
@ -301,9 +336,16 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x80, 0x80, 0x00}, Ciphered Text {0x8f, 0xe3}, MAC-I {0xe0, 0xdf, 0x82, 0x92}
*/
n_packets = 1;
srslte::unique_byte_buffer_t pdu_exp_count0_len18 = allocate_unique_buffer(*pool);
pdu_exp_count0_len18->append_bytes(pdu1_count0_snlen18, sizeof(pdu1_count0_snlen18));
TESTASSERT(test_tx(1, srslte::PDCP_SN_LEN_18, std::move(pdu_exp_count0_len18), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_18,
n_packets,
std::move(pdu_exp_count0_len18),
pool,
log) == 0);
/*
* TX Test 5: PDCP Entity with SN LEN = 18
@ -311,9 +353,16 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x82, 0x00, 0x00}, Ciphered Text {0x15, 0x01}, MAC-I {0xf4, 0xb0, 0xfc, 0xc5}
*/
n_packets = 131073;
srslte::unique_byte_buffer_t pdu_exp_sn131072_len18 = allocate_unique_buffer(*pool);
pdu_exp_sn131072_len18->append_bytes(pdu1_count131072_snlen18, sizeof(pdu1_count131072_snlen18));
TESTASSERT(test_tx(131073, srslte::PDCP_SN_LEN_18, std::move(pdu_exp_sn131072_len18), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_18,
n_packets,
std::move(pdu_exp_sn131072_len18),
pool,
log) == 0);
/*
* TX Test 6: PDCP Entity with SN LEN = 18
@ -321,9 +370,32 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
* Input: {0x18, 0xE2}
* Output: PDCP Header {0x80, 0x00, 0x00}, Ciphered Text {0xc2, 0x47}, MAC-I {0xa8, 0xdd, 0xc0, 0x73}
*/
n_packets = 262145;
srslte::unique_byte_buffer_t pdu_exp_count262144_len18 = allocate_unique_buffer(*pool);
pdu_exp_count262144_len18->append_bytes(pdu1_count262144_snlen18, sizeof(pdu1_count262144_snlen18));
TESTASSERT(test_tx(262145, srslte::PDCP_SN_LEN_18, std::move(pdu_exp_count262144_len18), pool, log) == 0);
TESTASSERT(test_tx(n_packets,
normal_init_state,
srslte::PDCP_SN_LEN_18,
n_packets,
std::move(pdu_exp_count262144_len18),
pool,
log) == 0);
/*
* TX Test 7: PDCP Entity with SN LEN = 18
* Test TX at COUNT wraparound.
* Should print a warning and drop all packets after wraparound.
*/
n_packets = 5;
srslte::unique_byte_buffer_t pdu_exp_count4294967295_len18 = allocate_unique_buffer(*pool);
pdu_exp_count4294967295_len18->append_bytes(pdu1_count4294967295_snlen18, sizeof(pdu1_count4294967295_snlen18));
TESTASSERT(test_tx(n_packets,
near_wraparound_init_state,
srslte::PDCP_SN_LEN_12,
1,
std::move(pdu_exp_count4294967295_len18),
pool,
log) == 0);
return 0;
}
@ -333,13 +405,6 @@ int test_tx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
*/
int test_rx_all(srslte::byte_buffer_pool* pool, srslte::log* log)
{
// This is the normal initial state. All state variables are set to zero
pdcp_initial_state normal_init_state = {};
// Some tests regarding COUNT wraparound take really long.
// This puts the PCDC state closer to wraparound quickly.
pdcp_initial_state near_wraparound_init_state = {
.tx_next = 4294967295, .rx_next = 4294967295, .rx_deliv = 4294967295, .rx_reord = 0};
/*
* RX Test 1: PDCP Entity with SN LEN = 12
@ -412,8 +477,8 @@ int run_all_tests(srslte::byte_buffer_pool* pool)
// srslte::PDCP_SN_LEN_18,
// srslte::pdcp_t_reordering_t::ms500};
//gen_expected_pdu(std::move(sdu), 0, cfg_tx, sec_cfg, &log, pool);
//TESTASSERT(test_tx_all(pool, &log) == 0);
TESTASSERT(test_rx_all(pool, &log) == 0);
TESTASSERT(test_tx_all(pool, &log) == 0);
//TESTASSERT(test_rx_all(pool, &log) == 0);
return 0;
}

7
lib/test/upper/pdcp_nr_test.h
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@ -85,8 +85,11 @@ public:
{
log->info_hex(sdu->msg, sdu->N_bytes, "RLC SDU");
last_pdcp_pdu.swap(sdu);
rx_count++;
}
uint64_t rx_count = 0;
private:
srslte::log* log;
srslte::unique_byte_buffer_t last_pdcp_pdu;
@ -97,7 +100,7 @@ private:
class rrc_dummy : public srsue::rrc_interface_pdcp
{
public:
rrc_dummy(srslte::log* log_) : log(log_) {}
rrc_dummy(srslte::log* log_) {}
void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) {}
void write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu) {}
@ -107,8 +110,6 @@ public:
std::string get_rb_name(uint32_t lcid) { return "None"; }
private:
srslte::log* log;
};
class gw_dummy : public srsue::gw_interface_pdcp

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