Implement IuCS (large refactoring and addition)

osmo-nitb becomes osmo-msc
add DIUCS debug log constant
add iucs.[hc]
add msc vty, remove nitb vty
add libiudummy, to avoid linking Iu deps in tests
Use new msc_tx_dtap() instead of gsm0808_submit_dtap()
libmgcp: add mgcpgw client API
bridge calls via mgcpgw

mgcp: hack RAB success from nano3G: patch first RTP payload
The ip.access nano3G needs the first RTP payload's first two bytes to read hex
'e400', or it will reject the RAB assignment. Add flag
patched_first_rtp_payload to mgcp_rtp_state to detect the first RTP payload on
a stream, and overwrite its first bytes with e400. This should probably be
configurable, but seems to not harm other femto cells (as long as we patch only
the first RTP payload in each stream). Only do this when sending to the BTS
side.

Change-Id: Ie13ff348117e892d41b8355ab6c24915301eaeaf

1 files changed, 116 insertions, 0 deletions

diff --git a/openbsc/src/libmgcp/mgcpgw_client_vty.c b/openbsc/src/libmgcp/mgcpgw_client_vty.c
new file mode 100644
index 000000000..a42ee4e5d
--- /dev/null
+++ b/openbsc/src/libmgcp/mgcpgw_client_vty.c
@@ -0,0 +1,116 @@
+/* MGCPGW client interface to quagga VTY */
+/* (C) 2016 by sysmocom s.m.f.c. GmbH <info@sysmocom.de>
+ * Based on OpenBSC interface to quagga VTY (libmsc/vty_interface_layer3.c)
+ * (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009-2011 by Holger Hans Peter Freyther
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <inttypes.h>
+#include <stdlib.h>
+#include <talloc.h>
+
+#include <osmocom/vty/command.h>
+
+#include <openbsc/vty.h>
+#include <openbsc/mgcpgw_client.h>
+
+#define MGCPGW_STR "MGCP gateway configuration for RTP streams\n"
+
+struct mgcpgw_client_conf *global_mgcpgw_client_conf = NULL;
+
+DEFUN(cfg_mgcpgw_local_ip, cfg_mgcpgw_local_ip_cmd,
+      "mgcpgw local-ip A.B.C.D",
+      MGCPGW_STR "local bind to connect to MGCP gateway with\n"
+      "local bind IP address\n")
+{
+	if (!global_mgcpgw_client_conf)
+		return CMD_ERR_NOTHING_TODO;
+	global_mgcpgw_client_conf->local_addr =
+		talloc_strdup(gsmnet_from_vty(vty), argv[0]);
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_mgcpgw_local_port, cfg_mgcpgw_local_port_cmd,
+      "mgcpgw local-port <0-65535>",
+      MGCPGW_STR "local bind to connect to MGCP gateway with\n"
+      "local bind port\n")
+{
+	if (!global_mgcpgw_client_conf)
+		return CMD_ERR_NOTHING_TODO;
+	global_mgcpgw_client_conf->local_port = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_mgcpgw_remote_ip, cfg_mgcpgw_remote_ip_cmd,
+      "mgcpgw remote-ip A.B.C.D",
+      MGCPGW_STR "remote bind to connect to MGCP gateway with\n"
+      "remote bind IP address\n")
+{
+	if (!global_mgcpgw_client_conf)
+		return CMD_ERR_NOTHING_TODO;
+	global_mgcpgw_client_conf->remote_addr =
+		talloc_strdup(gsmnet_from_vty(vty), argv[0]);
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_mgcpgw_remote_port, cfg_mgcpgw_remote_port_cmd,
+      "mgcpgw remote-port <0-65535>",
+      MGCPGW_STR "remote bind to connect to MGCP gateway with\n"
+      "remote bind port\n")
+{
+	if (!global_mgcpgw_client_conf)
+		return CMD_ERR_NOTHING_TODO;
+	global_mgcpgw_client_conf->remote_port = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
+
+int mgcpgw_client_config_write(struct vty *vty, const char *indent)
+{
+	const char *addr;
+	int port;
+
+	addr = global_mgcpgw_client_conf->local_addr;
+	if (addr)
+		vty_out(vty, "%smgcpgw local-ip %s%s", indent, addr,
+			VTY_NEWLINE);
+	port = global_mgcpgw_client_conf->local_port;
+	if (port >= 0)
+		vty_out(vty, "%smgcpgw local-port %u%s", indent,
+			(uint16_t)port, VTY_NEWLINE);
+
+	addr = global_mgcpgw_client_conf->remote_addr;
+	if (addr)
+		vty_out(vty, "%smgcpgw remote-ip %s%s", indent, addr,
+			VTY_NEWLINE);
+	port = global_mgcpgw_client_conf->remote_port;
+	if (port >= 0)
+		vty_out(vty, "%smgcpgw remote-port %u%s", indent,
+			(uint16_t)port, VTY_NEWLINE);
+
+	return CMD_SUCCESS;
+}
+
+void mgcpgw_client_vty_init(int node, struct mgcpgw_client_conf *conf)
+{
+	global_mgcpgw_client_conf = conf;
+
+	install_element(node, &cfg_mgcpgw_local_ip_cmd);
+	install_element(node, &cfg_mgcpgw_local_port_cmd);
+	install_element(node, &cfg_mgcpgw_remote_ip_cmd);
+	install_element(node, &cfg_mgcpgw_remote_port_cmd);
+}