aboutsummaryrefslogtreecommitdiffstats
path: root/tests/gb/bssgp_fc_test.c
blob: f74be3009b1c53de19b9ea0b5fa1a36c561389ec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/* 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 <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;
	gettimeofday(&now, NULL);

	timersub(&now, &tv_start, &tv);

	return tv.tv_sec * 100 + tv.tv_usec/10000;
}

/* round to deciseconds to make sure test output is always consistent */
int round_decisec(int csec_in)
{
	int tmp = csec_in / 10;

	return tmp * 10;
}

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();
	csecs = round_decisec(csecs);

	printf("%u: FC OUT Nr %lu\n", csecs, (unsigned long) msg);
}

static int fc_in(struct bssgp_flow_control *fc, unsigned int pdu_len)
{
	unsigned int csecs = get_centisec_diff();
	csecs = round_decisec(csecs);

	printf("%u: FC IN Nr %lu\n", csecs, in_ctr);
	bssgp_fc_in(fc, (struct msgb *) in_ctr, pdu_len, NULL);
	in_ctr++;
}


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;

	bssgp_fc_init(fc, bucket_size_max, bucket_leak_rate, max_queue_depth,
		      fc_out_cb);

	gettimeofday(&tv_start, NULL);

	for (i = 0; i < pdu_count; i++) {
		fc_in(fc, pdu_len);
		osmo_timers_check();
		osmo_timers_prepare();
		osmo_timers_update();
	}

	while (1) {
		usleep(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;

	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);

	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("===== BSSGP flow-control test END\n\n");

	exit(EXIT_SUCCESS);
}