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lapdm: Create a simple test case to transmit data between both ends 

This is testing the establishment of two ends (BTS, MS) one is in
the polling mode as used by osmo-bts. Transfer data between the two
ends. The sent data is not verified though. This should be followed
up soon.
This commit is contained in:
Holger Hans Peter Freyther 2011-12-11 20:25:12 +01:00
parent d318e61607
commit 72bd4eb3b9
7 changed files with 294 additions and 1 deletions
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3
.gitignore vendored
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@ -50,9 +50,12 @@ tests/ussd/ussd_test
tests/smscb/smscb_test
tests/bits/bitrev_test
tests/a5/a5_test
tests/auth/milenage_test
tests/conv/conv_test
tests/lapd/lapd_test
utils/osmo-arfcn
utils/osmo-auc-gen
doc/codec
doc/core

1
configure.ac
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@ -167,6 +167,7 @@ AC_OUTPUT(
tests/a5/Makefile
tests/auth/Makefile
tests/conv/Makefile
tests/lapd/Makefile
utils/Makefile
Doxyfile.core
Doxyfile.gsm

2
tests/Makefile.am
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@ -1,5 +1,5 @@
if ENABLE_TESTS
SUBDIRS = timer sms ussd smscb bits a5 conv auth
SUBDIRS = timer sms ussd smscb bits a5 conv auth lapd
if ENABLE_MSGFILE
SUBDIRS += msgfile
endif

9
tests/lapd/Makefile.am Normal file
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@ -0,0 +1,9 @@
INCLUDES = $(all_includes) -I$(top_srcdir)/include
AM_FLAGS = -Wall -O0
noinst_PROGRAMS = lapd_test
EXTRA_DIST = lapd_test.ok
lapd_test_SOURCES = lapd_test.c
lapd_test_LDADD = \
$(top_builddir)/src/libosmocore.la \
$(top_builddir)/src/gsm/libosmogsm.la

258
tests/lapd/lapd_test.c Normal file
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@ -0,0 +1,258 @@
/*
* (C) 2011 by Holger Hans Peter Freyther
* (C) 2011 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <osmocom/core/logging.h>
#include <osmocom/gsm/lapdm.h>
#include <osmocom/gsm/rsl.h>
#include <errno.h>
#include <string.h>
#define CHECK_RC(rc) \
if (rc != 0) { \
printf("Operation failed rc=%d on %s:%d\n", rc, __FILE__, __LINE__); \
abort(); \
}
#define ASSERT(exp) \
if (!(exp)) { \
printf("Assert failed %s %s:%d\n", #exp, __FILE__, __LINE__); \
abort(); \
}
static struct log_info info = {};
struct lapdm_polling_state {
struct lapdm_channel *bts;
int bts_read;
struct lapdm_channel *ms;
int ms_read;
};
static struct msgb *msgb_from_array(const uint8_t *data, int len)
{
struct msgb *msg = msgb_alloc_headroom(4096, 128, "data");
msg->l3h = msgb_put(msg, len);
memcpy(msg->l3h, data, len);
return msg;
}
static struct msgb *create_cm_serv_req(void)
{
struct msgb *msg;
static const uint8_t cm[] = {
0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08,
0x29, 0x47, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80,
};
msg = msgb_from_array(cm, sizeof(cm));
rsl_rll_push_l3(msg, RSL_MT_EST_REQ, 0, 0, 1);
return msg;
}
static struct msgb *create_mm_id_req(void)
{
struct msgb *msg;
/* okay... not an identity request */
static const uint8_t mm[] = {
0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08,
0x29, 0x47, 0x80, 0x00,
};
msg = msgb_from_array(mm, sizeof(mm));
rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1);
return msg;
}
static struct msgb *create_dummy_data_req(void)
{
struct msgb *msg;
/* okay... not an identity request */
static const uint8_t dummy1[] = {
0xab, 0x03, 0x30, 0x60, 0x06,
};
msg = msgb_from_array(dummy1, sizeof(dummy1));
rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1);
return msg;
}
static int send(struct msgb *in_msg, struct lapdm_channel *chan)
{
struct osmo_phsap_prim pp;
struct msgb *msg;
int rc;
msg = msgb_alloc_headroom(128, 64, "PH-DATA.ind");
osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA,
PRIM_OP_INDICATION, msg);
/* copy over actual MAC block */
msg->l2h = msgb_put(msg, msgb_l2len(in_msg));
memcpy(msg->l2h, in_msg->l2h, msgb_l2len(in_msg));
/* LAPDm requires those... */
pp.u.data.chan_nr = 0;
pp.u.data.link_id = 0;
/* feed into the LAPDm code of libosmogsm */
rc = lapdm_phsap_up(&pp.oph, &chan->lapdm_dcch);
ASSERT(rc == 0 || rc == -EBUSY);
return 0;
}
/*
* I get called from the LAPDm code when something was sent my way...
*/
static int bts_to_ms_tx_cb(struct msgb *in_msg, struct lapdm_entity *le, void *_ctx)
{
struct lapdm_polling_state *state = _ctx;
state->bts_read += 1;
printf("%s: MS->BTS(us) message %d\n", __func__, msgb_length(in_msg));
msgb_free(in_msg);
return 0;
}
static int ms_to_bts_l1_cb(struct osmo_prim_hdr *oph, void *_ctx)
{
int rc;
struct lapdm_polling_state *state = _ctx;
printf("%s: MS(us) -> BTS prim message\n", __func__);
/* i stuff it into the LAPDm channel of the BTS */
rc = send(oph->msg, state->bts);
msgb_free(oph->msg);
}
static int ms_to_bts_tx_cb(struct msgb *msg, struct lapdm_entity *le, void *_ctx)
{
struct lapdm_polling_state *state = _ctx;
printf("%s: BTS->MS(us) message %d\n", __func__, msgb_length(msg));
if (state->ms_read == 0) {
/* TODO: Verify that this is a: PRIM_DL_EST, PRIM_OP_CONFIRM */
} else if (state->ms_read == 1) {
/* TODO: Verify that this is: create_mm_id_req() */
}
state->ms_read += 1;
msgb_free(msg);
return 0;
}
static void test_lapdm_polling()
{
printf("I do some very simple LAPDm test.\n");
int rc;
struct lapdm_polling_state test_state;
struct osmo_phsap_prim pp;
/* Configure LAPDm on both sides */
struct lapdm_channel bts_to_ms_channel;
struct lapdm_channel ms_to_bts_channel;
memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel));
memset(&ms_to_bts_channel, 0, sizeof(ms_to_bts_channel));
memset(&test_state, 0, sizeof(test_state));
test_state.bts = &bts_to_ms_channel;
test_state.ms = &ms_to_bts_channel;
/* BTS to MS in polling mode */
lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS);
lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY);
lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state);
lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state);
/* MS to BTS in direct mode */
lapdm_channel_init(&ms_to_bts_channel, LAPDM_MODE_MS);
lapdm_channel_set_l1(&ms_to_bts_channel, ms_to_bts_l1_cb, &test_state);
lapdm_channel_set_l3(&ms_to_bts_channel, ms_to_bts_tx_cb, &test_state);
/*
* We try to send messages from the MS to the BTS to the MS..
*/
/* 1. Start with MS -> BTS, BTS should have a pending message */
printf("Establishing link.\n");
lapdm_rslms_recvmsg(create_cm_serv_req(), &ms_to_bts_channel);
/* 2. Poll on the BTS for sending out a confirmation */
printf("\nConfirming\n");
ASSERT(test_state.bts_read == 1)
rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp);
CHECK_RC(rc);
ASSERT(pp.oph.msg->data == pp.oph.msg->l2h);
send(pp.oph.msg, &ms_to_bts_channel);
msgb_free(pp.oph.msg);
ASSERT(test_state.ms_read == 1);
/* 3. Send some data to the MS */
printf("\nSending back to MS\n");
lapdm_rslms_recvmsg(create_mm_id_req(), &bts_to_ms_channel);
rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp);
CHECK_RC(rc);
send(pp.oph.msg, &ms_to_bts_channel);
msgb_free(pp.oph.msg);
ASSERT(test_state.ms_read == 2);
/* verify that there is nothing more to poll */
rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp);
ASSERT(rc < 0);
/* 3. And back to the BTS */
printf("\nSending back to BTS\n");
ASSERT(test_state.ms_read == 2);
lapdm_rslms_recvmsg(create_dummy_data_req(), &ms_to_bts_channel);
/* 4. And back to the MS */
ASSERT(test_state.bts_read == 2)
ASSERT(test_state.ms_read == 2);
rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp);
CHECK_RC(rc);
send(pp.oph.msg, &ms_to_bts_channel);
ASSERT(test_state.ms_read == 2);
msgb_free(pp.oph.msg);
/* verify that there is nothing more to poll */
rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp);
ASSERT(rc < 0);
/* clean up */
lapdm_channel_exit(&bts_to_ms_channel);
lapdm_channel_exit(&ms_to_bts_channel);
}
int main(int argc, char **argv)
{
osmo_init_logging(&info);
test_lapdm_polling();
printf("Success.\n");
return 0;
}

16
tests/lapd/lapd_test.ok Normal file
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@ -0,0 +1,16 @@
I do some very simple LAPDm test.
Establishing link.
ms_to_bts_l1_cb: MS(us) -> BTS prim message
bts_to_ms_tx_cb: MS->BTS(us) message 29
Confirming
ms_to_bts_tx_cb: BTS->MS(us) message 9
Sending back to MS
ms_to_bts_tx_cb: BTS->MS(us) message 21
ms_to_bts_l1_cb: MS(us) -> BTS prim message
Sending back to BTS
ms_to_bts_l1_cb: MS(us) -> BTS prim message
bts_to_ms_tx_cb: MS->BTS(us) message 14
Success.

6
tests/testsuite.at
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@ -59,3 +59,9 @@ AT_KEYWORDS([auth])
cat $abs_srcdir/auth/milenage_test.ok > expout
AT_CHECK([$abs_top_builddir/tests/auth/milenage_test], [], [expout], [ignore])
AT_CLEANUP
AT_SETUP([lapd])
AT_KEYWORDS([lapd])
cat $abs_srcdir/lapd/lapd_test.ok > expout
AT_CHECK([$abs_top_builddir/tests/lapd/lapd_test], [], [expout], [ignore])
AT_CLEANUP