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#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <openbsc/gprs_llc.h>
#include <openbsc/gprs_utils.h>
#define ASSERT_FALSE(x) if (x) { printf("Should have returned false.\n"); abort(); }
#define ASSERT_TRUE(x) if (!x) { printf("Should have returned true.\n"); abort(); }
/**
* GSM 04.64 8.4.2 Receipt of unacknowledged information
*/
static int nu_is_retransmission(uint16_t nu, uint16_t vur)
{
int ret = gprs_llc_is_retransmit(nu, vur);
printf("N(U) = %d, V(UR) = %d => %s\n", nu, vur,
ret == 1 ? "retransmit" : "new");
return ret;
}
static void test_8_4_2()
{
printf("Testing gprs_llc_is_retransmit.\n");
ASSERT_FALSE(nu_is_retransmission(0, 0));
ASSERT_TRUE (nu_is_retransmission(0, 1));
/* expect 1... check for retransmissions */
ASSERT_TRUE (nu_is_retransmission(0, 1));
ASSERT_TRUE (nu_is_retransmission(511, 1));
ASSERT_TRUE (nu_is_retransmission(483, 1));
ASSERT_TRUE (nu_is_retransmission(482, 1));
ASSERT_FALSE(nu_is_retransmission(481, 1));
/* expect 511... check for retransmissions */
ASSERT_FALSE(nu_is_retransmission(0, 240)); // ahead
ASSERT_FALSE(nu_is_retransmission(0, 511)); // ahead
ASSERT_FALSE(nu_is_retransmission(1, 511)); // ahead
ASSERT_FALSE(nu_is_retransmission(511, 511)); // same
ASSERT_TRUE (nu_is_retransmission(510, 511)); // behind
ASSERT_TRUE (nu_is_retransmission(481, 511)); // behind
ASSERT_FALSE(nu_is_retransmission(479, 511)); // wrapped
}
static void apn_round_trip(const uint8_t *input, size_t len, const char *wanted_output)
{
char output[len ? len : 1];
uint8_t encoded[len + 50];
char *out_str;
int enc_len;
/* decode and verify we have what we want */
out_str = gprs_apn_to_str(output, input, len);
OSMO_ASSERT(out_str);
OSMO_ASSERT(out_str == &output[0]);
OSMO_ASSERT(strlen(out_str) == strlen(wanted_output));
OSMO_ASSERT(strcmp(out_str, wanted_output) == 0);
/* encode and verify it */
if (len != 0) {
enc_len = gprs_str_to_apn(encoded, ARRAY_SIZE(encoded), wanted_output);
OSMO_ASSERT(enc_len == len);
OSMO_ASSERT(memcmp(encoded, input, enc_len) == 0);
} else {
enc_len = gprs_str_to_apn(encoded, 0, wanted_output);
OSMO_ASSERT(enc_len == -1);
}
}
static void test_gsm_03_03_apn(void)
{
{
/* test invalid writes */
const uint8_t ref[10] = { 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF };
uint8_t output[10];
int enc_len;
memcpy(output, ref, ARRAY_SIZE(output));
enc_len = gprs_str_to_apn(output, 0, "");
OSMO_ASSERT(enc_len == -1);
OSMO_ASSERT(memcmp(ref, output, ARRAY_SIZE(ref)) == 0);
memcpy(output, ref, ARRAY_SIZE(output));
enc_len = gprs_str_to_apn(output, 0, "foo");
OSMO_ASSERT(enc_len == -1);
OSMO_ASSERT(memcmp(ref, output, ARRAY_SIZE(ref)) == 0);
memcpy(output, ref, ARRAY_SIZE(output));
enc_len = gprs_str_to_apn(output, 1, "foo");
OSMO_ASSERT(enc_len == -1);
OSMO_ASSERT(memcmp(ref + 1, output + 1, ARRAY_SIZE(ref) - 1) == 0);
memcpy(output, ref, ARRAY_SIZE(output));
enc_len = gprs_str_to_apn(output, 2, "foo");
OSMO_ASSERT(enc_len == -1);
OSMO_ASSERT(memcmp(ref + 2, output + 2, ARRAY_SIZE(ref) - 2) == 0);
memcpy(output, ref, ARRAY_SIZE(output));
enc_len = gprs_str_to_apn(output, 3, "foo");
OSMO_ASSERT(enc_len == -1);
OSMO_ASSERT(memcmp(ref + 3, output + 3, ARRAY_SIZE(ref) - 3) == 0);
}
{
/* single empty label */
uint8_t input[] = { 0x0 };
const char *output = "";
apn_round_trip(input, ARRAY_SIZE(input), output);
}
{
/* no label */
uint8_t input[] = { };
const char *output = "";
apn_round_trip(input, ARRAY_SIZE(input), output);
}
{
/* single label with A */
uint8_t input[] = { 0x1, 65 };
const char *output = "A";
apn_round_trip(input, ARRAY_SIZE(input), output);
OSMO_ASSERT(gprs_apn_to_str(NULL, input, ARRAY_SIZE(input) - 1) == NULL);
}
{
uint8_t input[] = { 0x3, 65, 66, 67, 0x2, 90, 122 };
const char *output = "ABC.Zz";
char tmp[strlen(output) + 1];
apn_round_trip(input, ARRAY_SIZE(input), output);
OSMO_ASSERT(gprs_apn_to_str(tmp, input, ARRAY_SIZE(input) - 1) == NULL);
OSMO_ASSERT(gprs_apn_to_str(tmp, input, ARRAY_SIZE(input) - 2) == NULL);
OSMO_ASSERT(gprs_apn_to_str(tmp, input, ARRAY_SIZE(input) - 4) == NULL);
OSMO_ASSERT(gprs_apn_to_str(tmp, input, ARRAY_SIZE(input) - 5) == NULL);
OSMO_ASSERT(gprs_apn_to_str(tmp, input, ARRAY_SIZE(input) - 6) == NULL);
}
}
/* TODO: Move tlv testing to libosmocore */
static void check_tlv_parse(uint8_t **data, size_t *data_len,
uint8_t exp_tag, size_t exp_len, const uint8_t *exp_val)
{
uint8_t *value;
size_t value_len;
uint8_t tag;
int rc;
uint8_t *saved_data = *data;
size_t saved_data_len = *data_len;
rc = gprs_match_tlv(data, data_len, exp_tag ^ 1, NULL, NULL);
OSMO_ASSERT(rc == 0);
rc = gprs_match_tlv(data, data_len, exp_tag, &value, &value_len);
OSMO_ASSERT(rc == (int)value_len + 2);
OSMO_ASSERT(value_len == exp_len);
OSMO_ASSERT(memcmp(value, exp_val, exp_len) == 0);
/* restore data/data_len */
*data = saved_data;
*data_len = saved_data_len;
rc = gprs_shift_tlv(data, data_len, &tag, &value, &value_len);
OSMO_ASSERT(rc == (int)value_len + 2);
OSMO_ASSERT(tag == exp_tag);
OSMO_ASSERT(value_len == exp_len);
OSMO_ASSERT(memcmp(value, exp_val, exp_len) == 0);
}
static void check_tv_fixed_match(uint8_t **data, size_t *data_len,
uint8_t tag, size_t len, const uint8_t *exp_val)
{
uint8_t *value;
int rc;
rc = gprs_match_tv_fixed(data, data_len, tag ^ 1, len, NULL);
OSMO_ASSERT(rc == 0);
rc = gprs_match_tv_fixed(data, data_len, tag, len, &value);
OSMO_ASSERT(rc == (int)len + 1);
OSMO_ASSERT(memcmp(value, exp_val, len) == 0);
}
static void check_v_fixed_shift(uint8_t **data, size_t *data_len,
size_t len, const uint8_t *exp_val)
{
uint8_t *value;
int rc;
rc = gprs_shift_v_fixed(data, data_len, len, &value);
OSMO_ASSERT(rc == (int)len);
OSMO_ASSERT(memcmp(value, exp_val, len) == 0);
}
static void check_lv_shift(uint8_t **data, size_t *data_len,
size_t exp_len, const uint8_t *exp_val)
{
uint8_t *value;
size_t value_len;
int rc;
rc = gprs_shift_lv(data, data_len, &value, &value_len);
OSMO_ASSERT(rc == (int)value_len + 1);
OSMO_ASSERT(value_len == exp_len);
OSMO_ASSERT(memcmp(value, exp_val, exp_len) == 0);
}
static void check_tlv_match_data_len(size_t data_len, uint8_t tag, size_t len,
const uint8_t *test_data)
{
uint8_t buf[300] = {0};
uint8_t *unchanged_ptr = buf - 1;
size_t unchanged_len = 0xdead;
size_t tmp_data_len = data_len;
uint8_t *value = unchanged_ptr;
size_t value_len = unchanged_len;
uint8_t *data = buf;
OSMO_ASSERT(data_len <= sizeof(buf));
tlv_put(data, tag, len, test_data);
if (data_len < len + 2) {
OSMO_ASSERT(-1 == gprs_match_tlv(&data, &tmp_data_len,
tag, &value, &value_len));
OSMO_ASSERT(tmp_data_len == 0);
OSMO_ASSERT(data == buf + data_len);
OSMO_ASSERT(value == unchanged_ptr);
OSMO_ASSERT(value_len == unchanged_len);
} else {
OSMO_ASSERT(0 <= gprs_match_tlv(&data, &tmp_data_len,
tag, &value, &value_len));
OSMO_ASSERT(value != unchanged_ptr);
OSMO_ASSERT(value_len != unchanged_len);
}
}
static void check_tv_fixed_match_data_len(size_t data_len,
uint8_t tag, size_t len,
const uint8_t *test_data)
{
uint8_t buf[300] = {0};
uint8_t *unchanged_ptr = buf - 1;
size_t tmp_data_len = data_len;
uint8_t *value = unchanged_ptr;
uint8_t *data = buf;
OSMO_ASSERT(data_len <= sizeof(buf));
tv_fixed_put(data, tag, len, test_data);
if (data_len < len + 1) {
OSMO_ASSERT(-1 == gprs_match_tv_fixed(&data, &tmp_data_len,
tag, len, &value));
OSMO_ASSERT(tmp_data_len == 0);
OSMO_ASSERT(data == buf + data_len);
OSMO_ASSERT(value == unchanged_ptr);
} else {
OSMO_ASSERT(0 <= gprs_match_tv_fixed(&data, &tmp_data_len,
tag, len, &value));
OSMO_ASSERT(value != unchanged_ptr);
}
}
static void check_v_fixed_shift_data_len(size_t data_len,
size_t len, const uint8_t *test_data)
{
uint8_t buf[300] = {0};
uint8_t *unchanged_ptr = buf - 1;
size_t tmp_data_len = data_len;
uint8_t *value = unchanged_ptr;
uint8_t *data = buf;
OSMO_ASSERT(data_len <= sizeof(buf));
memcpy(data, test_data, len);
if (data_len < len) {
OSMO_ASSERT(-1 == gprs_shift_v_fixed(&data, &tmp_data_len,
len, &value));
OSMO_ASSERT(tmp_data_len == 0);
OSMO_ASSERT(data == buf + data_len);
OSMO_ASSERT(value == unchanged_ptr);
} else {
OSMO_ASSERT(0 <= gprs_shift_v_fixed(&data, &tmp_data_len,
len, &value));
OSMO_ASSERT(value != unchanged_ptr);
}
}
static void check_lv_shift_data_len(size_t data_len,
size_t len, const uint8_t *test_data)
{
uint8_t buf[300] = {0};
uint8_t *unchanged_ptr = buf - 1;
size_t unchanged_len = 0xdead;
size_t tmp_data_len = data_len;
uint8_t *value = unchanged_ptr;
size_t value_len = unchanged_len;
uint8_t *data = buf;
lv_put(data, len, test_data);
if (data_len < len + 1) {
OSMO_ASSERT(-1 == gprs_shift_lv(&data, &tmp_data_len,
&value, &value_len));
OSMO_ASSERT(tmp_data_len == 0);
OSMO_ASSERT(data == buf + data_len);
OSMO_ASSERT(value == unchanged_ptr);
OSMO_ASSERT(value_len == unchanged_len);
} else {
OSMO_ASSERT(0 <= gprs_shift_lv(&data, &tmp_data_len,
&value, &value_len));
OSMO_ASSERT(value != unchanged_ptr);
OSMO_ASSERT(value_len != unchanged_len);
}
}
static void test_tlv_shift_functions()
{
uint8_t test_data[1024];
uint8_t buf[1024];
uint8_t *data_end;
unsigned i, len;
uint8_t *data;
size_t data_len;
const uint8_t tag = 0x1a;
printf("Test shift functions\n");
for (i = 0; i < ARRAY_SIZE(test_data); i++)
test_data[i] = (uint8_t)i;
for (len = 0; len < 256; len++) {
const unsigned iterations = sizeof(buf) / (len + 2) / 4;
memset(buf, 0xee, sizeof(buf));
data_end = data = buf;
for (i = 0; i < iterations; i++) {
data_end = tlv_put(data_end, tag, len, test_data);
data_end = tv_fixed_put(data_end, tag, len, test_data);
/* v_fixed_put */
memcpy(data_end, test_data, len);
data_end += len;
data_end = lv_put(data_end, len, test_data);
}
data_len = data_end - data;
OSMO_ASSERT(data_len <= sizeof(buf));
for (i = 0; i < iterations; i++) {
check_tlv_parse(&data, &data_len, tag, len, test_data);
check_tv_fixed_match(&data, &data_len, tag, len, test_data);
check_v_fixed_shift(&data, &data_len, len, test_data);
check_lv_shift(&data, &data_len, len, test_data);
}
OSMO_ASSERT(data == data_end);
/* Test at end of data */
OSMO_ASSERT(-1 == gprs_match_tlv(&data, &data_len, tag, NULL, NULL));
OSMO_ASSERT(-1 == gprs_match_tv_fixed(&data, &data_len, tag, len, NULL));
OSMO_ASSERT((len ? -1 : 0) == gprs_shift_v_fixed(&data, &data_len, len, NULL));
OSMO_ASSERT(-1 == gprs_shift_lv(&data, &data_len, NULL, NULL));
/* Test invalid data_len */
for (data_len = 0; data_len <= len + 2 + 1; data_len += 1) {
check_tlv_match_data_len(data_len, tag, len, test_data);
check_tv_fixed_match_data_len(data_len, tag, len, test_data);
check_v_fixed_shift_data_len(data_len, len, test_data);
check_lv_shift_data_len(data_len, len, test_data);
}
}
}
int main(int argc, char **argv)
{
test_8_4_2();
test_gsm_03_03_apn();
test_tlv_shift_functions();
printf("Done.\n");
return EXIT_SUCCESS;
}
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