diff options
Diffstat (limited to 'tests/gprs/gprs_test.c')
| -rw-r--r-- | tests/gprs/gprs_test.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/tests/gprs/gprs_test.c b/tests/gprs/gprs_test.c new file mode 100644 index 000000000..ff7740494 --- /dev/null +++ b/tests/gprs/gprs_test.c @@ -0,0 +1,236 @@ +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> + +#include <openbsc/gprs_llc.h> +#include <openbsc/gprs_utils.h> + +#include <openbsc/debug.h> + +#include <osmocom/core/application.h> +#include <osmocom/gsm/gsup.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); + } +} + +static void test_gprs_timer_enc_dec(void) +{ + int i, u, secs, tmr; + const int upper_secs_test_limit = 12000; + int dec_secs, last_dec_secs = -1; + + printf("Test GPRS timer decoding/encoding\n"); + + /* Check gprs_tmr_to_secs with all 256 encoded values */ + for (u = 0; u <= GPRS_TMR_DEACTIVATED; u += 32) { + fprintf(stderr, "Testing decoding with timer value unit %u\n", + u / 32); + for (i = 0; i < 32; i++) { + switch (u) { + case GPRS_TMR_2SECONDS: + OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 2 * i); + break; + + default: + case GPRS_TMR_MINUTE: + OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 60 * i); + break; + + case GPRS_TMR_6MINUTE: + OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 360 * i); + break; + + case GPRS_TMR_DEACTIVATED: + OSMO_ASSERT(gprs_tmr_to_secs(u + i) == -1); + break; + } + + OSMO_ASSERT(gprs_tmr_to_secs(u + i) < upper_secs_test_limit); + } + } + + /* Check gprs_secs_to_tmr_floor for secs that can exactly be + * represented as GPRS timer values */ + for (i = 0; i < GPRS_TMR_DEACTIVATED; i++) { + int j; + secs = gprs_tmr_to_secs(i); + tmr = gprs_secs_to_tmr_floor(secs); + OSMO_ASSERT(secs == gprs_tmr_to_secs(tmr)); + + /* Check that the highest resolution is used */ + for (j = 0; j < tmr; j++) + OSMO_ASSERT(secs != gprs_tmr_to_secs(j)); + } + OSMO_ASSERT(GPRS_TMR_DEACTIVATED == gprs_secs_to_tmr_floor(-1)); + + /* Check properties of gprs_secs_to_tmr_floor */ + for (secs = 0; secs <= upper_secs_test_limit; secs++) { + int tmr = gprs_secs_to_tmr_floor(secs); + int delta_secs = gprs_tmr_to_secs((tmr & ~0x1f) | 1); + dec_secs = gprs_tmr_to_secs(tmr); + + /* Check floor */ + OSMO_ASSERT(dec_secs <= secs); + /* Check monotonicity */ + OSMO_ASSERT(dec_secs >= last_dec_secs); + /* Check max distance (<= resolution) */ + OSMO_ASSERT(dec_secs - last_dec_secs <= delta_secs); + + last_dec_secs = dec_secs; + } +} + +const struct log_info_cat default_categories[] = { + [DGPRS] = { + .name = "DGPRS", + .description = "GPRS Packet Service", + .enabled = 0, .loglevel = LOGL_DEBUG, + }, +}; + +static struct log_info info = { + .cat = default_categories, + .num_cat = ARRAY_SIZE(default_categories), +}; + +int main(int argc, char **argv) +{ + osmo_init_logging(&info); + + test_8_4_2(); + test_gsm_03_03_apn(); + test_gprs_timer_enc_dec(); + + printf("Done.\n"); + return EXIT_SUCCESS; +} |