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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <unistd.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/datagram.h>
#define DRTP_TEST 0
struct log_info_cat rtp_test_cat[] = {
[DRTP_TEST] = {
.name = "DRTP_TEST",
.description = "RPT-server test",
.color = "\033[1;35m",
.enabled = 1, .loglevel = LOGL_DEBUG,
},
};
const struct log_info rtp_test_log_info = {
.filter_fn = NULL,
.cat = rtp_test_cat,
.num_cat = ARRAY_SIZE(rtp_test_cat),
};
static struct osmo_dgram *conn;
static struct osmo_rtp_handle *rtp;
int read_cb(struct osmo_dgram *conn)
{
struct msgb *msg;
char dummy_data[RTP_PT_GSM_FULL_PAYLOAD_LEN] = "payload test";
struct rtp_hdr *rtph;
LOGP(DRTP_TEST, LOGL_DEBUG, "received message from datagram\n");
msg = msgb_alloc(RTP_MSGB_SIZE, "RTP/test");
if (msg == NULL) {
LOGP(DRTP_TEST, LOGL_ERROR, "cannot allocate message\n");
return -1;
}
if (osmo_dgram_recv(conn, msg) < 0) {
LOGP(DRTP_TEST, LOGL_ERROR, "cannot receive message\n");
return -1;
}
rtph = osmo_rtp_get_hdr(msg);
if (rtph == NULL) {
msgb_free(msg);
LOGP(DRTP_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);
/*
* ... now build gsm_data_frame, set callref and msg_type based
* on the rtp payload type (map RTP_PT_GSM_FULL to GSM_THCF_FRAME).
* Then, pass it to the RSL layer.
*/
msg = msgb_alloc(1200, "RTP/test");
if (msg == NULL) {
LOGP(DRTP_TEST, LOGL_ERROR, "cannot allocate message\n");
return -1;
}
/* build reply. */
msg = osmo_rtp_build(rtp, RTP_PT_GSM_FULL,
RTP_PT_GSM_FULL_PAYLOAD_LEN,
dummy_data, RTP_PT_GSM_FULL_DURATION);
if (msg == NULL) {
LOGP(DLINP, LOGL_ERROR, "OOM\n");
return -1;
}
osmo_dgram_send(conn, msg);
return 0;
}
void sighandler(int foo)
{
LOGP(DLINP, LOGL_NOTICE, "closing RTP.\n");
osmo_dgram_close(conn);
osmo_dgram_destroy(conn);
osmo_rtp_handle_free(rtp);
exit(EXIT_SUCCESS);
}
static void *tall_test;
int main(int argc, char *argv[])
{
signal(SIGINT, sighandler);
tall_test = talloc_named_const(NULL, 1, "udp_rtp_test");
msgb_talloc_ctx_init(tall_test, 0);
osmo_init_logging2(tall_test, &rtp_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(DRTP_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 datagram server.
*/
conn = osmo_dgram_create(tall_test);
if (conn == NULL) {
LOGP(DRTP_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(DRTP_TEST, LOGL_NOTICE, "Entering main loop\n");
while(1) {
osmo_select_main(0);
}
}
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