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#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <openbsc/gprs_llc.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
}
int main(int argc, char **argv)
{
test_8_4_2();
printf("Done.\n");
return EXIT_SUCCESS;
}
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