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/* (C) 2017 by Harald Welte <laforge@gnumonks.org>
*
* 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 <stdio.h>
#include <errno.h>
#include <osmocom/core/sercomm.h>
#include <osmocom/core/msgb.h>
struct osmo_sercomm_inst g_osi;
static const uint8_t valid_dlci3[] = { 0x7E, 3, 0x03, 'f', 'o', 'o', 0x7E };
static const uint8_t valid_dlci23[] = { 0x7E, 23, 0x03, '2', '3', 0x7E };
static const uint8_t valid_dlci23esc[] = { 0x7E, 23, 0x03, 0x7D, '2' ^ (1 << 5), '3', 0x7E };
static const uint8_t valid_echo[] = { 0x7E, SC_DLCI_ECHO, 0x03, 'e', 'c', 'h', 'o', 0x7E };
static void rx_ser_data(struct osmo_sercomm_inst *sc, const uint8_t *data, unsigned int len)
{
unsigned int i;
printf("Feeding data into sercomm: %s\n", osmo_hexdump(data, len));
for (i = 0; i < len; i++) {
int rc = osmo_sercomm_drv_rx_char(sc, data[i]);
OSMO_ASSERT(rc == 1);
}
}
static void dlci_rx_cb(struct osmo_sercomm_inst *sercomm, uint8_t dlci, struct msgb *msg)
{
printf("%s(): %s\n", __func__, msgb_hexdump(msg));
msgb_free(msg);
}
static struct msgb *create_mahlzeit_msg(void)
{
struct msgb *msg = osmo_sercomm_alloc_msgb(10);
OSMO_ASSERT(msg);
msgb_put_u8(msg, 'M');
msgb_put_u8(msg, 'a');
msgb_put_u8(msg, 'h');
msgb_put_u8(msg, 'l');
msgb_put_u8(msg, 'z');
msgb_put_u8(msg, 'e');
msgb_put_u8(msg, 'i');
msgb_put_u8(msg, 't');
return msg;
}
static void drain_from_uart_side(struct osmo_sercomm_inst *osi)
{
uint8_t ch;
int rc;
printf("Draining from UART: ");
while ((rc = osmo_sercomm_drv_pull(osi, &ch) == 1))
printf("0x%02x ", ch);
printf("\n");
}
static void test_echo(struct osmo_sercomm_inst *osi)
{
printf("Testing built-in echo DLCI\n");
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, SC_DLCI_ECHO) == 0);
rx_ser_data(osi, valid_echo, sizeof(valid_echo));
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, SC_DLCI_ECHO) == 1);
drain_from_uart_side(osi);
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, SC_DLCI_ECHO) == 0);
}
static void test_sercomm(void)
{
int rc;
uint8_t ch;
struct msgb *msg;
printf("Initializing sercomm_inst\n");
osmo_sercomm_init(&g_osi);
g_osi.uart_id = 2342;
printf("Registering callback for invalid DLCI\n");
rc = osmo_sercomm_register_rx_cb(&g_osi, 255, NULL);
OSMO_ASSERT(rc == -EINVAL);
printf("Registering callback for valid DLCI\n");
rc = osmo_sercomm_register_rx_cb(&g_osi, 23, &dlci_rx_cb);
OSMO_ASSERT(rc == 0);
printf("Checking reject of overlod of valid DLCI\n");
rc = osmo_sercomm_register_rx_cb(&g_osi, 23, NULL);
OSMO_ASSERT(rc == -EBUSY);
printf("Checking Rx of incoming msg for valid DLCI\n");
rx_ser_data(&g_osi, valid_dlci23, sizeof(valid_dlci23));
printf("Checking Rx of incoming msg for unequipped DLCI\n");
rx_ser_data(&g_osi, valid_dlci3, sizeof(valid_dlci3));
printf("Checking Rx of incoming msg for valid DLCI\n");
rx_ser_data(&g_osi, valid_dlci23, sizeof(valid_dlci23));
printf("Checking Rx of incoming msg with escaped char for valid DLCI\n");
rx_ser_data(&g_osi, valid_dlci23esc, sizeof(valid_dlci23esc));
printf("Checking that no chars are to be transmitted\n");
OSMO_ASSERT(osmo_sercomm_drv_pull(&g_osi, &ch) == 0);
printf("Transmitting msgb through sercomm\n");
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, 42) == 0);
msg = create_mahlzeit_msg();
osmo_sercomm_sendmsg(&g_osi, 42, msg);
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, 42) == 1);
drain_from_uart_side(&g_osi);
OSMO_ASSERT(osmo_sercomm_tx_queue_depth(&g_osi, 42) == 0);
test_echo(&g_osi);
}
int main(int argc, char **argv)
{
test_sercomm();
return 0;
}
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