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authorPablo Neira Ayuso <pablo@gnumonks.org>2012-01-24 14:32:37 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2012-02-23 13:44:26 +0100
commit72cd95b3527ee45639f0445817781afc3e732f45 (patch)
treeae72c9aa167320b8c12cfbc9ab3700d2037f6d1d /examples
parent2b5d3ce7c69e1149bb2af815ab8b8534026063ca (diff)
add RTP support
This patch adds the initial RTP support for libosmo-netif, it's based on Harald's RTP support available in openBSC. I have also added a couple of example to show how our new channel infrastructure interacts with the RTP layer. Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
Diffstat (limited to 'examples')
-rw-r--r--examples/Makefile.am12
-rw-r--r--examples/rtp-udp-test-client.c143
-rw-r--r--examples/rtp-udp-test-server.c145
3 files changed, 299 insertions, 1 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 173b620..c9849db 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -9,7 +9,9 @@ noinst_PROGRAMS = ipa-stream-client \
lapd-over-datagram-user \
lapd-over-datagram-network \
stream-client \
- stream-server
+ stream-server \
+ rtp-udp-test-client \
+ rtp-udp-test-server
ipa_stream_client_SOURCES = ipa-stream-client.c
ipa_stream_client_LDADD = $(top_builddir)/src/libosmonetif.la \
@@ -36,3 +38,11 @@ stream_client_LDADD = $(top_builddir)/src/libosmonetif.la \
stream_server_SOURCES = stream-server.c
stream_server_LDADD = $(top_builddir)/src/libosmonetif.la \
$(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS)
+
+rtp_udp_test_client_SOURCES = rtp-udp-test-client.c
+rtp_udp_test_client_LDADD = $(top_builddir)/src/libosmonetif.la \
+ $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS)
+
+rtp_udp_test_server_SOURCES = rtp-udp-test-server.c
+rtp_udp_test_server_LDADD = $(top_builddir)/src/libosmonetif.la \
+ $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS)
diff --git a/examples/rtp-udp-test-client.c b/examples/rtp-udp-test-client.c
new file mode 100644
index 0000000..4989a6c
--- /dev/null
+++ b/examples/rtp-udp-test-client.c
@@ -0,0 +1,143 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <time.h>
+
+#include <osmocom/core/linuxlist.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 = "RTP client 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 *conn;
+static struct osmo_rtp_handle *rtp;
+
+static int read_cb(struct osmo_dgram_conn *conn)
+{
+ struct msgb *msg;
+ int payload_type;
+
+ LOGP(DLINP, LOGL_DEBUG, "received message\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_conn_recv(conn, msg) < 0) {
+ msgb_free(msg);
+ LOGP(DRTP_TEST, LOGL_ERROR, "cannot receive message\n");
+ return -1;
+ }
+ payload_type = osmo_rtp_parse(rtp, msg);
+ if (payload_type < 0) {
+ 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",
+ payload_type);
+
+ msgb_free(msg);
+ return 0;
+}
+
+void sighandler(int foo)
+{
+ LOGP(DLINP, LOGL_NOTICE, "closing RTP.\n");
+ osmo_dgram_conn_close(conn);
+ osmo_dgram_conn_destroy(conn);
+ osmo_rtp_handle_free(rtp);
+ exit(EXIT_SUCCESS);
+}
+
+static void *tall_test;
+
+int main(int argc, char *argv[])
+{
+ int i;
+ char dummy_data[RTP_PT_GSM_FULL_PAYLOAD_LEN] = {};
+
+ signal(SIGINT, sighandler);
+
+ tall_test = talloc_named_const(NULL, 1, "rtp_test");
+
+ osmo_init_logging(&rtp_test_log_info);
+ log_set_log_level(osmo_stderr_target, LOGL_DEBUG);
+
+ /*
+ * initialize RTP stuff.
+ */
+ rtp = osmo_rtp_handle_create(tall_test);
+ if (rtp == NULL) {
+ LOGP(DLINP, LOGL_ERROR, "creating 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 socket.
+ */
+
+ conn = osmo_dgram_conn_create(tall_test);
+ if (conn == NULL) {
+ fprintf(stderr, "cannot create client\n");
+ exit(EXIT_FAILURE);
+ }
+ osmo_dgram_conn_set_local_addr(conn, "127.0.0.1");
+ osmo_dgram_conn_set_local_port(conn, 20001);
+ osmo_dgram_conn_set_remote_addr(conn, "127.0.0.1");
+ osmo_dgram_conn_set_remote_port(conn, 20000);
+ osmo_dgram_conn_set_read_cb(conn, read_cb);
+
+ if (osmo_dgram_conn_open(conn) < 0) {
+ fprintf(stderr, "cannot open client\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for(i=0; i<10; i++) {
+ struct msgb *msg;
+
+ 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");
+ continue;
+ }
+ osmo_dgram_conn_send(conn, msg);
+ }
+
+ LOGP(DLINP, LOGL_NOTICE, "Entering main loop\n");
+
+ while(1) {
+ osmo_select_main(0);
+ }
+}
diff --git a/examples/rtp-udp-test-server.c b/examples/rtp-udp-test-server.c
new file mode 100644
index 0000000..f1920b8
--- /dev/null
+++ b/examples/rtp-udp-test-server.c
@@ -0,0 +1,145 @@
+#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 *conn;
+static struct osmo_rtp_handle *rtp;
+
+int read_cb(struct osmo_dgram_conn *conn)
+{
+ struct msgb *msg;
+ char dummy_data[RTP_PT_GSM_FULL_PAYLOAD_LEN] = {};
+ int payload_type;
+
+ 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_conn_recv(conn, msg) < 0) {
+ LOGP(DRTP_TEST, LOGL_ERROR, "cannot receive message\n");
+ return -1;
+ }
+ payload_type = osmo_rtp_parse(rtp, msg);
+ if (payload_type < 0) {
+ msgb_free(msg);
+ LOGP(DRTP_TEST, LOGL_ERROR, "cannot parse RTP message\n");
+ return -1;
+ }
+ LOGP(DLINP, LOGL_DEBUG, "received message with payload type: %d\n",
+ 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_conn_send(conn, msg);
+
+ return 0;
+}
+
+void sighandler(int foo)
+{
+ LOGP(DLINP, LOGL_NOTICE, "closing RTP.\n");
+ osmo_dgram_conn_close(conn);
+ osmo_dgram_conn_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");
+
+ osmo_init_logging(&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_conn_create(tall_test);
+ if (conn == NULL) {
+ LOGP(DRTP_TEST, LOGL_ERROR, "cannot create UDP socket\n");
+ exit(EXIT_FAILURE);
+ }
+ osmo_dgram_conn_set_local_addr(conn, "127.0.0.1");
+ osmo_dgram_conn_set_local_port(conn, 20000);
+ osmo_dgram_conn_set_remote_addr(conn, "127.0.0.1");
+ osmo_dgram_conn_set_remote_port(conn, 20001);
+ osmo_dgram_conn_set_read_cb(conn, read_cb);
+
+ if (osmo_dgram_conn_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);
+ }
+}