tests: Add hnb-test to connect to hnbgw and tests its functions

Only connects currently
diff --git a/src/tests/hnb-test.c b/src/tests/hnb-test.c
new file mode 100644
index 0000000..583222a
--- /dev/null
+++ b/src/tests/hnb-test.c
@@ -0,0 +1,179 @@
+/* Test HNB */
+
+/* (C) 2015 by Daniel Willmann <dwillmann@sysmocom.de>
+ * (C) 2015 by Sysmocom s.f.m.c. GmbH
+ * 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 <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/sctp.h>
+#include <arpa/inet.h>
+
+#include <osmocom/core/application.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/socket.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/write_queue.h>
+
+#include <osmocom/vty/telnet_interface.h>
+#include <osmocom/vty/logging.h>
+
+#include "hnb-test.h"
+
+static void *tall_hnb_ctx;
+void *talloc_asn1_ctx;
+
+struct hnb_test g_hnb_test = {
+	.gw_port = IUH_DEFAULT_SCTP_PORT,
+};
+
+static int hnb_read_cb(struct osmo_fd *fd)
+{
+	struct hnb_test *hnb_test = fd->data;
+	struct sctp_sndrcvinfo sinfo;
+	struct msgb *msg = msgb_alloc(IUH_MSGB_SIZE, "Iuh rx");
+	int flags = 0;
+	int rc;
+
+	if (!msg)
+		return -ENOMEM;
+
+	rc = sctp_recvmsg(fd->fd, msgb_data(msg), msgb_tailroom(msg),
+			  NULL, NULL, &sinfo, &flags);
+	if (rc < 0) {
+		LOGP(DMAIN, LOGL_ERROR, "Error during sctp_recvmsg()\n");
+		/* FIXME: clean up after disappeared HNB */
+		return rc;
+	} else
+		msgb_put(msg, rc);
+
+	if (flags & MSG_NOTIFICATION) {
+		LOGP(DMAIN, LOGL_INFO, "Ignoring SCTP notification\n");
+		msgb_free(msg);
+		return 0;
+	}
+
+	sinfo.sinfo_ppid = ntohl(sinfo.sinfo_ppid);
+
+	switch (sinfo.sinfo_ppid) {
+	case IUH_PPI_HNBAP:
+		printf("HNBAP mesage received\n");
+//		rc = hnbgw_hnbap_rx(hnb, msg);
+		break;
+	case IUH_PPI_RUA:
+		printf("RUA mesage received\n");
+//		rc = hnbgw_rua_rx(hnb, msg);
+		break;
+	case IUH_PPI_SABP:
+	case IUH_PPI_RNA:
+	case IUH_PPI_PUA:
+		LOGP(DMAIN, LOGL_ERROR, "Unimplemented SCTP PPID=%u received\n",
+		     sinfo.sinfo_ppid);
+		rc = 0;
+		break;
+	default:
+		LOGP(DMAIN, LOGL_ERROR, "Unknown SCTP PPID=%u received\n",
+		     sinfo.sinfo_ppid);
+		rc = 0;
+		break;
+	}
+
+	msgb_free(msg);
+	return rc;
+}
+
+static int hnb_write_cb(struct osmo_fd *fd, struct msgb *msg)
+{
+	struct hnb_test *ctx = fd->data;
+	struct sctp_sndrcvinfo sinfo = {
+		.sinfo_ppid = htonl(msgb_ppid(msg)),
+		.sinfo_stream = 0,
+	};
+	int rc;
+
+	rc = sctp_send(fd->fd, msgb_data(msg), msgb_length(msg),
+			&sinfo, 0);
+	/* we don't need to msgb_free(), write_queue does this for us */
+	return rc;
+}
+
+static const struct log_info_cat log_cat[] = {
+	[DMAIN] = {
+		.name = "DMAIN", .loglevel = LOGL_DEBUG, .enabled = 1,
+		.color = "",
+		.description = "Main program",
+	},
+};
+
+static const struct log_info hnb_test_log_info = {
+	.cat = log_cat,
+	.num_cat = ARRAY_SIZE(log_cat),
+};
+
+static struct vty_app_info vty_info = {
+	.name		= "OsmoHNB-Test",
+	.version	= "0",
+};
+
+int main(int argc, const char *argv)
+{
+	int rc;
+
+	tall_hnb_ctx = talloc_named_const(NULL, 0, "hnb_context");
+	talloc_asn1_ctx = talloc_named_const(NULL, 0, "asn1_context");
+
+	rc = osmo_init_logging(&hnb_test_log_info);
+	if (rc < 0)
+		exit(1);
+
+	vty_init(&vty_info);
+
+	osmo_wqueue_init(&g_hnb_test.wqueue, 16);
+	g_hnb_test.wqueue.bfd.data = &g_hnb_test;
+	g_hnb_test.wqueue.read_cb = hnb_read_cb;
+	g_hnb_test.wqueue.write_cb = hnb_write_cb;
+
+	rc = osmo_sock_init_ofd(&g_hnb_test.wqueue.bfd, AF_INET, SOCK_STREAM,
+			   IPPROTO_SCTP, "127.0.0.1",
+			   g_hnb_test.gw_port, OSMO_SOCK_F_CONNECT);
+	if (rc < 0) {
+		perror("Error connecting to Iuh port");
+		exit(1);
+	}
+//	sctp_sock_init(g_hnb_test.conn_fd);
+
+	while (1) {
+		rc = osmo_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	/* not reached */
+	exit(0);
+}