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-rw-r--r--tests/gprs/gprs_test.c236
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 00000000..ff774049
--- /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;
+}