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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/application.h>
#include <osmocom/core/select.h>
#include <osmocom/netif/rtp.h>
#include <osmocom/netif/osmux.h>
#include <osmocom/netif/datagram.h>
#define DOSMUX_TEST 0
struct log_info_cat osmux_test_cat[] = {
[DOSMUX_TEST] = {
.name = "DOSMUX_TEST",
.description = "osmux test input",
.color = "\033[1;35m",
.enabled = 1, .loglevel = LOGL_DEBUG,
},
};
const struct log_info osmux_test_log_info = {
.filter_fn = NULL,
.cat = osmux_test_cat,
.num_cat = ARRAY_SIZE(osmux_test_cat),
};
static int fd;
static void amr_open(void)
{
fd = open("/tmp/input.amr", O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0) {
perror("open");
exit(EXIT_FAILURE);
}
write(fd, "#!AMR\n", strlen("#!AMR\n"));
}
static void amr_close(void)
{
close(fd);
}
static void amr_write(struct msgb *msg)
{
struct rtp_hdr *rtph;
void *amr;
unsigned int len;
/* as described by rfc4867, see page 35 */
rtph = osmo_rtp_get_hdr(msg);
amr = osmo_rtp_get_payload(rtph, msg, &len);
write(fd, (uint8_t *)amr + 1, len - 1);
}
static struct osmo_dgram *conn;
static struct osmo_rtp_handle *rtp;
static void osmux_deliver(struct msgb *batch_msg)
{
printf("sending batch (len=%d)\n", batch_msg->len);
osmo_dgram_send(conn, batch_msg);
}
/*
* This is the input handle for osmux. It stores the last osmux sequence that
* has been used and the deliver function that sends the osmux batch.
*/
struct osmux_in_handle h_input = {
.osmux_seq = 0, /* sequence number to start OSmux message from */
.batch_factor = 4, /* batch up to 4 RTP messages */
.deliver = osmux_deliver,
};
int read_cb(struct osmo_dgram *conn)
{
struct msgb *msg;
struct rtp_hdr *rtph;
int ret;
LOGP(DOSMUX_TEST, LOGL_DEBUG, "received message from datagram\n");
msg = msgb_alloc(RTP_MSGB_SIZE, "OSMUX/test");
if (msg == NULL) {
LOGP(DOSMUX_TEST, LOGL_ERROR, "cannot allocate message\n");
return -1;
}
if (osmo_dgram_recv(conn, msg) < 0) {
LOGP(DOSMUX_TEST, LOGL_ERROR, "cannot receive message\n");
return -1;
}
rtph = osmo_rtp_get_hdr(msg);
if (rtph == NULL) {
msgb_free(msg);
LOGP(DOSMUX_TEST, LOGL_ERROR, "cannot parse RTP message\n");
return -1;
}
LOGP(DLINP, LOGL_DEBUG, "received message with RTP payload type: %d\n",
rtph->payload_type);
if (rtph->payload_type == RTP_PT_AMR)
amr_write(msg);
/* now build the osmux frame */
if (osmux_xfrm_input_get_ccid(&h_input, rtph->ssrc) < 0)
osmux_xfrm_input_register_ccid(&h_input, rtph->ssrc);
while ((ret = osmux_xfrm_input(&h_input, msg)) > 0) {
/* batch full, deliver it */
osmux_xfrm_input_deliver(&h_input);
}
if (ret == -1)
printf("something is wrong\n");
return 0;
}
void sighandler(int foo)
{
LOGP(DLINP, LOGL_NOTICE, "closing test.\n");
osmo_dgram_close(conn);
osmo_dgram_destroy(conn);
osmo_rtp_handle_free(rtp);
amr_close();
exit(EXIT_SUCCESS);
}
static void *tall_test;
/*
* This is the output handle for osmux, it stores last RTP sequence and
* timestamp that has been used. There should be one per circuit ID.
*/
int main(int argc, char *argv[])
{
amr_open();
signal(SIGINT, sighandler);
tall_test = talloc_named_const(NULL, 1, "osmux_test");
osmo_init_logging(&osmux_test_log_info);
log_set_log_level(osmo_stderr_target, LOGL_DEBUG);
/*
* initialize RTP handler.
*/
rtp = osmo_rtp_handle_create(tall_test);
if (rtp == NULL) {
LOGP(DOSMUX_TEST, LOGL_ERROR, "Error init RTP handler\n");
exit(EXIT_FAILURE);
}
osmo_rtp_handle_tx_set_sequence(rtp, random());
osmo_rtp_handle_tx_set_ssrc(rtp, random());
osmo_rtp_handle_tx_set_timestamp(rtp, time(NULL));
/*
* initialize OSMUX handlers.
*/
osmux_xfrm_input_init(&h_input);
/*
* initialize datagram server.
*/
conn = osmo_dgram_create(tall_test);
if (conn == NULL) {
LOGP(DOSMUX_TEST, LOGL_ERROR, "cannot create UDP socket\n");
exit(EXIT_FAILURE);
}
osmo_dgram_set_local_addr(conn, "127.0.0.1");
osmo_dgram_set_local_port(conn, 20000);
osmo_dgram_set_remote_addr(conn, "127.0.0.1");
osmo_dgram_set_remote_port(conn, 20001);
osmo_dgram_set_read_cb(conn, read_cb);
if (osmo_dgram_open(conn) < 0) {
fprintf(stderr, "cannot open client\n");
exit(EXIT_FAILURE);
}
LOGP(DOSMUX_TEST, LOGL_NOTICE, "Entering main loop\n");
while(1) {
osmo_select_main(0);
}
}
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