[gprs] Build the SGSN stand-alone and not as part of bsc_hack
Instead of continuing to add more and more functionality to the
bsc_hack binary, we should have the new SGSN code run as a separate
executable.
After this commit we now build a 'osmo_sgsn' executable, using its
own osmo_sgsn.cfg config file.
However, the SGSN is not yet functional, mainly due to the fact that
the BSSGP and GMM code are written with the assumption that there
is a msgb->trx->bts and the according 'sturct gsm_bts' data model
around - which clearly is no longer the case outside of bsc_hack.
diff --git a/openbsc/src/sgsn_vty.c b/openbsc/src/sgsn_vty.c
new file mode 100644
index 0000000..ec18fcb
--- /dev/null
+++ b/openbsc/src/sgsn_vty.c
@@ -0,0 +1,146 @@
+/*
+ * (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 <openbsc/sgsn.h>
+#include <openbsc/gprs_ns.h>
+
+#include <vty/command.h>
+#include <vty/vty.h>
+
+static struct sgsn_config *g_cfg = NULL;
+
+static struct cmd_node sgsn_node = {
+ SGSN_NODE,
+ "%s(sgsn)#",
+ 1,
+};
+
+static int config_write_sgsn(struct vty *vty)
+{
+ struct in_addr ia;
+
+ vty_out(vty, "sgsn%s", VTY_NEWLINE);
+
+ if (g_cfg->nsip_listen_ip) {
+ ia.s_addr = htonl(g_cfg->nsip_listen_ip);
+ vty_out(vty, " nsip local ip %s%s", inet_ntoa(ia),
+ VTY_NEWLINE);
+ }
+ vty_out(vty, " nsip local port %u%s", g_cfg->nsip_listen_port,
+ VTY_NEWLINE);
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(show_sgsn, show_sgsn_cmd, "show sgsn",
+ SHOW_STR "Display information about the SGSN")
+{
+ /* FIXME: iterate over list of NS-VC's and display their state */
+ struct gprs_ns_inst *nsi = g_cfg->nsi;
+ struct gprs_nsvc *nsvc;
+
+ llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
+ vty_out(vty, "NSEI %5u, NS-VC %5u, %s-mode, %s %s%s",
+ nsvc->nsei, nsvc->nsvci,
+ nsvc->remote_end_is_sgsn ? "BSS" : "SGSN",
+ nsvc->state & NSE_S_ALIVE ? "ALIVE" : "DEAD",
+ nsvc->state & NSE_S_BLOCKED ? "BLOCKED" : "UNBLOCKED",
+ VTY_NEWLINE);
+ if (nsvc->nsi->ll == GPRS_NS_LL_UDP)
+ vty_out(vty, " remote peer %s:%u%s",
+ inet_ntoa(nsvc->ip.bts_addr.sin_addr),
+ ntohs(nsvc->ip.bts_addr.sin_port), VTY_NEWLINE);
+ }
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_sgsn,
+ cfg_sgsn_cmd,
+ "sgsn",
+ "Configure the SGSN")
+{
+ vty->node = SGSN_NODE;
+ return CMD_SUCCESS;
+}
+
+
+DEFUN(cfg_nsip_local_ip,
+ cfg_nsip_local_ip_cmd,
+ "nsip 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_local_port,
+ cfg_nsip_local_port_cmd,
+ "nsip 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;
+}
+
+
+
+
+int sgsn_vty_init(void)
+{
+ install_element(VIEW_NODE, &show_sgsn_cmd);
+
+ install_element(CONFIG_NODE, &cfg_sgsn_cmd);
+ install_node(&sgsn_node, config_write_sgsn);
+ install_default(SGSN_NODE);
+ install_element(SGSN_NODE, &cfg_nsip_local_ip_cmd);
+ install_element(SGSN_NODE, &cfg_nsip_local_port_cmd);
+
+ return 0;
+}
+
+int sgsn_parse_config(const char *config_file, struct sgsn_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;
+}