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/* test routines for BSSGP flow control implementation in libosmogb
* (C) 2012 by Harald Welte <laforge@gnumonks.org>
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
#include <osmocom/gprs/gprs_bssgp.h>
static unsigned long in_ctr = 1;
static struct timeval tv_start;
int get_centisec_diff(void)
{
struct timeval tv;
struct timeval now;
osmo_gettimeofday(&now, NULL);
timersub(&now, &tv_start, &tv);
return tv.tv_sec * 100 + tv.tv_usec/10000;
}
static int fc_out_cb(struct bssgp_flow_control *fc, struct msgb *msg,
uint32_t llc_pdu_len, void *priv)
{
unsigned int csecs = get_centisec_diff();
printf("%u: FC OUT Nr %lu\n", csecs, (unsigned long) msg->cb[0]);
msgb_free(msg);
return 0;
}
static void fc_in(struct bssgp_flow_control *fc, unsigned int pdu_len)
{
struct msgb *msg;
unsigned int csecs = get_centisec_diff();
int rc;
msg = msgb_alloc(1, "fc test");
msg->cb[0] = in_ctr++;
printf("%u: FC IN Nr %lu\n", csecs, msg->cb[0]);
rc = bssgp_fc_in(fc, msg, pdu_len, NULL);
switch (rc) {
case 0:
printf(" -> %d: ok\n", rc);
break;
case -ENOSPC:
printf(" -> %d: queue full, msg dropped.\n", rc);
break;
case -EIO:
printf(" -> %d: PDU too large, msg dropped.\n", rc);
break;
default:
printf(" -> %d: error, msg dropped.\n", rc);
break;
}
}
static void test_fc(uint32_t bucket_size_max, uint32_t bucket_leak_rate,
uint32_t max_queue_depth, uint32_t pdu_len,
uint32_t pdu_count)
{
struct bssgp_flow_control *fc = talloc_zero(NULL, struct bssgp_flow_control);
int i;
osmo_gettimeofday_override_time = (struct timeval){
.tv_sec = 1486385000,
.tv_usec = 423423,
};
osmo_gettimeofday_override = true;
bssgp_fc_init(fc, bucket_size_max, bucket_leak_rate, max_queue_depth,
fc_out_cb);
osmo_gettimeofday(&tv_start, NULL);
/* Fill the queue with PDUs, possibly beyond the queue being full. If it is full, additional PDUs
* are discarded. */
for (i = 0; i < pdu_count; i++) {
fc_in(fc, pdu_len);
osmo_timers_check();
osmo_timers_prepare();
osmo_timers_update();
}
while (1) {
osmo_gettimeofday_override_add(0, 100000);
osmo_timers_check();
osmo_timers_prepare();
osmo_timers_update();
if (llist_empty(&fc->queue))
break;
}
}
static void help(void)
{
printf(" -h --help This help message\n");
printf(" -s --bucket-size-max N Maximum size of bucket in octets\n");
printf(" -r --bucket-leak-rate N Bucket leak rate in octets/sec\n");
printf(" -d --max-queue-depth N Maximum length of pending PDU queue (msgs)\n");
printf(" -l --pdu-length N Length of each PDU in octets\n");
}
int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
{
return -1;
}
static struct log_info info = {};
int main(int argc, char **argv)
{
uint32_t bucket_size_max = 100; /* octets */
uint32_t bucket_leak_rate = 100; /* octets / second */
uint32_t max_queue_depth = 5; /* messages */
uint32_t pdu_length = 10; /* octets */
uint32_t pdu_count = 20; /* messages */
int c;
void *tall_msgb_ctx;
static const struct option long_options[] = {
{ "bucket-size-max", 1, 0, 's' },
{ "bucket-leak-rate", 1, 0, 'r' },
{ "max-queue-depth", 1, 0, 'd' },
{ "pdu-length", 1, 0, 'l' },
{ "pdu-count", 1, 0, 'c' },
{ "help", 0, 0, 'h' },
{ 0, 0, 0, 0 }
};
osmo_init_logging(&info);
log_set_use_color(osmo_stderr_target, 0);
log_set_print_filename(osmo_stderr_target, 0);
tall_msgb_ctx = msgb_talloc_ctx_init(NULL, 0);
while ((c = getopt_long(argc, argv, "s:r:d:l:c:",
long_options, NULL)) != -1) {
switch (c) {
case 's':
bucket_size_max = atoi(optarg);
break;
case 'r':
bucket_leak_rate = atoi(optarg);
break;
case 'd':
max_queue_depth = atoi(optarg);
break;
case 'l':
pdu_length = atoi(optarg);
break;
case 'c':
pdu_count = atoi(optarg);
break;
case 'h':
help();
exit(EXIT_SUCCESS);
break;
default:
exit(EXIT_FAILURE);
}
}
/* bucket leak rate less than 100 not supported! */
if (bucket_leak_rate < 100) {
fprintf(stderr, "Bucket leak rate < 100 not supported!\n");
exit(EXIT_FAILURE);
}
printf("===== BSSGP flow-control test START\n");
printf("size-max=%u oct, leak-rate=%u oct/s, "
"queue-len=%u msgs, pdu_len=%u oct, pdu_cnt=%u\n\n", bucket_size_max,
bucket_leak_rate, max_queue_depth, pdu_length, pdu_count);
test_fc(bucket_size_max, bucket_leak_rate, max_queue_depth,
pdu_length, pdu_count);
printf("msgb ctx: %zu b in %zu blocks (0 b in 1 block == just the context)\n",
talloc_total_size(tall_msgb_ctx),
talloc_total_blocks(tall_msgb_ctx));
OSMO_ASSERT(talloc_total_size(tall_msgb_ctx) == 0);
OSMO_ASSERT(talloc_total_blocks(tall_msgb_ctx) == 1);
talloc_free(tall_msgb_ctx);
printf("===== BSSGP flow-control test END\n\n");
exit(EXIT_SUCCESS);
}
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