gprs: Move TLV parser functions to gprs_utils.c and rename them
Currently the parser functions for single information elements are
defined within gprs_gb_parse.c and not exported explicitely. In
addition they are named like libosmocore's TLV parser functions and
do not have a proper name prefix. Since it is planned to use them for
other protocols, they need to be globally accessible.
This patch moves them to gprs_utils.c and renames them.
The new names are:
lv_shift -> gprs_shift_lv
v_fixed_shift -> gprs_shift_v_fixed
lv_shift -> gprs_shift_lv
v_fixed_shift -> gprs_shift_v_fixed
In the long term, these functions should be moved to libosmocore (and
renamed again).
Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/gprs/gprs_test.c b/openbsc/tests/gprs/gprs_test.c
index 30e900f..5bc2073 100644
--- a/openbsc/tests/gprs/gprs_test.c
+++ b/openbsc/tests/gprs/gprs_test.c
@@ -138,10 +138,238 @@
}
}
+/* TODO: Move tlv testing to libosmocore */
+static void check_tlv_match(uint8_t **data, size_t *data_len,
+ uint8_t tag, size_t exp_len, const uint8_t *exp_val)
+{
+ uint8_t *value;
+ size_t value_len;
+ int rc;
+
+ rc = gprs_match_tlv(data, data_len, tag ^ 1, NULL, NULL);
+ OSMO_ASSERT(rc == 0);
+
+ rc = gprs_match_tlv(data, data_len, 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);
+}
+
+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_match(&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;