141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <openbsc/gprs_llc.h>
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#include <openbsc/gprs_utils.h>
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#include <openbsc/debug.h>
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#include <osmocom/core/application.h>
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#include <osmocom/gsm/gsup.h>
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#define ASSERT_FALSE(x) if (x) { printf("Should have returned false.\n"); abort(); }
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#define ASSERT_TRUE(x) if (!x) { printf("Should have returned true.\n"); abort(); }
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/**
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* GSM 04.64 8.4.2 Receipt of unacknowledged information
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*/
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static int nu_is_retransmission(uint16_t nu, uint16_t vur)
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{
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int ret = gprs_llc_is_retransmit(nu, vur);
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printf("N(U) = %d, V(UR) = %d => %s\n", nu, vur,
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ret == 1 ? "retransmit" : "new");
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return ret;
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}
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static void test_8_4_2()
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{
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printf("Testing gprs_llc_is_retransmit.\n");
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ASSERT_FALSE(nu_is_retransmission(0, 0));
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ASSERT_TRUE (nu_is_retransmission(0, 1));
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/* expect 1... check for retransmissions */
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ASSERT_TRUE (nu_is_retransmission(0, 1));
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ASSERT_TRUE (nu_is_retransmission(511, 1));
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ASSERT_TRUE (nu_is_retransmission(483, 1));
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ASSERT_TRUE (nu_is_retransmission(482, 1));
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ASSERT_FALSE(nu_is_retransmission(481, 1));
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/* expect 511... check for retransmissions */
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ASSERT_FALSE(nu_is_retransmission(0, 240)); // ahead
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ASSERT_FALSE(nu_is_retransmission(0, 511)); // ahead
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ASSERT_FALSE(nu_is_retransmission(1, 511)); // ahead
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ASSERT_FALSE(nu_is_retransmission(511, 511)); // same
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ASSERT_TRUE (nu_is_retransmission(510, 511)); // behind
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ASSERT_TRUE (nu_is_retransmission(481, 511)); // behind
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ASSERT_FALSE(nu_is_retransmission(479, 511)); // wrapped
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}
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static void test_gprs_timer_enc_dec(void)
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{
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int i, u, secs, tmr;
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const int upper_secs_test_limit = 12000;
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int dec_secs, last_dec_secs = -1;
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printf("Test GPRS timer decoding/encoding\n");
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/* Check gprs_tmr_to_secs with all 256 encoded values */
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for (u = 0; u <= GPRS_TMR_DEACTIVATED; u += 32) {
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fprintf(stderr, "Testing decoding with timer value unit %u\n",
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u / 32);
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for (i = 0; i < 32; i++) {
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switch (u) {
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case GPRS_TMR_2SECONDS:
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OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 2 * i);
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break;
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default:
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case GPRS_TMR_MINUTE:
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OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 60 * i);
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break;
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case GPRS_TMR_6MINUTE:
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OSMO_ASSERT(gprs_tmr_to_secs(u + i) == 360 * i);
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break;
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case GPRS_TMR_DEACTIVATED:
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OSMO_ASSERT(gprs_tmr_to_secs(u + i) == -1);
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break;
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}
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OSMO_ASSERT(gprs_tmr_to_secs(u + i) < upper_secs_test_limit);
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}
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}
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/* Check gprs_secs_to_tmr_floor for secs that can exactly be
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* represented as GPRS timer values */
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for (i = 0; i < GPRS_TMR_DEACTIVATED; i++) {
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int j;
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secs = gprs_tmr_to_secs(i);
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tmr = gprs_secs_to_tmr_floor(secs);
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OSMO_ASSERT(secs == gprs_tmr_to_secs(tmr));
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/* Check that the highest resolution is used */
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for (j = 0; j < tmr; j++)
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OSMO_ASSERT(secs != gprs_tmr_to_secs(j));
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}
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OSMO_ASSERT(GPRS_TMR_DEACTIVATED == gprs_secs_to_tmr_floor(-1));
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/* Check properties of gprs_secs_to_tmr_floor */
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for (secs = 0; secs <= upper_secs_test_limit; secs++) {
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int tmr = gprs_secs_to_tmr_floor(secs);
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int delta_secs = gprs_tmr_to_secs((tmr & ~0x1f) | 1);
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dec_secs = gprs_tmr_to_secs(tmr);
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/* Check floor */
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OSMO_ASSERT(dec_secs <= secs);
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/* Check monotonicity */
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OSMO_ASSERT(dec_secs >= last_dec_secs);
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/* Check max distance (<= resolution) */
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OSMO_ASSERT(dec_secs - last_dec_secs <= delta_secs);
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last_dec_secs = dec_secs;
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}
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}
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const struct log_info_cat default_categories[] = {
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[DGPRS] = {
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.name = "DGPRS",
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.description = "GPRS Packet Service",
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.enabled = 0, .loglevel = LOGL_DEBUG,
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},
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};
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static struct log_info info = {
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.cat = default_categories,
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.num_cat = ARRAY_SIZE(default_categories),
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};
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int main(int argc, char **argv)
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{
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osmo_init_logging(&info);
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test_8_4_2();
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test_gprs_timer_enc_dec();
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printf("Done.\n");
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return EXIT_SUCCESS;
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}
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