gb_proxy: Add initial VTY configuration code
diff --git a/openbsc/src/gb_proxy_vty.c b/openbsc/src/gb_proxy_vty.c
new file mode 100644
index 0000000..ae6be5e
--- /dev/null
+++ b/openbsc/src/gb_proxy_vty.c
@@ -0,0 +1,201 @@
+/*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+
+#include <openbsc/debug.h>
+
+#include <vty/command.h>
+#include <vty/vty.h>
+
+struct gbproxy_config {
+	u_int32_t nsip_listen_ip;
+	u_int16_t nsip_listen_port;
+
+	u_int32_t nsip_sgsn_ip;
+	u_int16_t nsip_sgsn_port;
+
+	u_int16_t nsip_sgsn_nsei;
+	u_int16_t nsip_sgsn_nsvci;
+};
+
+static struct gbproxy_config *g_cfg = NULL;
+
+/*
+ * vty code for mgcp below
+ */
+struct cmd_node gbproxy_node = {
+	GBPROXY_NODE,
+	"%s(gbproxy)#",
+	1,
+};
+
+static int config_write_gbproxy(struct vty *vty)
+{
+	struct in_addr ia;
+
+	vty_out(vty, "gbproxy%s", VTY_NEWLINE);
+
+	if (g_cfg->nsip_listen_ip) {
+		ia.s_addr = htonl(g_cfg->nsip_listen_ip);
+		vty_out(vty, "  nsip bss local ip %s%s", inet_ntoa(ia),
+			VTY_NEWLINE);
+	}
+	vty_out(vty, "  nsip bss local port %u%s", g_cfg->nsip_listen_port,
+		VTY_NEWLINE);
+	ia.s_addr = htonl(g_cfg->nsip_sgsn_ip);
+	vty_out(vty, "  nsip sgsn remote ip %s%s", inet_ntoa(ia),
+		VTY_NEWLINE);
+	vty_out(vty, "  nsip sgsn remote port %u%s", g_cfg->nsip_sgsn_port,
+		VTY_NEWLINE);
+	vty_out(vty, "  nsip sgsn nsei %u%s", g_cfg->nsip_sgsn_nsei,
+		VTY_NEWLINE);
+	vty_out(vty, "  nsip sgsn nsvci %u%s", g_cfg->nsip_sgsn_nsvci,
+		VTY_NEWLINE);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(show_gbproxy, show_gbproxy_cmd, "show gbproxy",
+      SHOW_STR "Display information about the Gb proxy")
+{
+	/* FIXME: iterate over list of NS-VC's and display their state */
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_gbproxy,
+      cfg_gbproxy_cmd,
+      "gbproxy",
+      "Configure the Gb proxy")
+{
+	vty->node = GBPROXY_NODE;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_bss_local_ip,
+      cfg_nsip_bss_local_ip_cmd,
+      "nsip bss local ip A.B.C.D",
+      "Set the IP address on which we listen for BSS connects")
+{
+	struct in_addr ia;
+
+	inet_aton(argv[0], &ia);
+	g_cfg->nsip_listen_ip = ntohl(ia.s_addr);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_bss_local_port,
+      cfg_nsip_bss_local_port_cmd,
+      "nsip bss local port <0-65534>",
+      "Set the UDP port on which we listen for BSS connects")
+{
+	unsigned int port = atoi(argv[0]);
+
+	g_cfg->nsip_listen_port = port;
+	return CMD_SUCCESS;
+}
+
+
+DEFUN(cfg_nsip_sgsn_ip,
+      cfg_nsip_sgsn_ip_cmd,
+      "nsip sgsn remote ip A.B.C.D",
+      "Set the IP of the SGSN to which the proxy shall connect")
+{
+	struct in_addr ia;
+
+	inet_aton(argv[0], &ia);
+	g_cfg->nsip_sgsn_ip = ntohl(ia.s_addr);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_sgsn_port,
+      cfg_nsip_sgsn_port_cmd,
+      "nsip sgsn remote port <0-65534>",
+      "Set the UDP port of the SGSN to which the proxy shall connect")
+{
+	unsigned int port = atoi(argv[0]);
+
+	g_cfg->nsip_sgsn_port = port;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_sgsn_nsei,
+      cfg_nsip_sgsn_nsei_cmd,
+      "nsip sgsn nsei <0-65534>",
+      "Set the NSEI to be used in the connection with the SGSN")
+{
+	unsigned int port = atoi(argv[0]);
+
+	g_cfg->nsip_sgsn_nsei = port;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_sgsn_nsvci,
+      cfg_nsip_sgsn_nsvci_cmd,
+      "nsip sgsn nsvci <0-65534>",
+      "Set the NSVCI to be used in the connection with the SGSN")
+{
+	unsigned int port = atoi(argv[0]);
+
+	g_cfg->nsip_sgsn_nsvci = port;
+	return CMD_SUCCESS;
+}
+
+
+int gbproxy_vty_init(void)
+{
+	install_element(VIEW_NODE, &show_gbproxy_cmd);
+
+	install_element(CONFIG_NODE, &cfg_gbproxy_cmd);
+	install_node(&gbproxy_node, config_write_gbproxy);
+	install_default(GBPROXY_NODE);
+	install_element(GBPROXY_NODE, &cfg_nsip_bss_local_ip_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_bss_local_port_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_ip_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_port_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_nsei_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_nsvci_cmd);
+
+	return 0;
+}
+
+int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg)
+{
+	int rc;
+
+	g_cfg = cfg;
+	rc = vty_read_config_file(config_file);
+	if (rc < 0) {
+		fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
+		return rc;
+	}
+
+	return 0;
+}
+