move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 189 insertions, 0 deletions

diff --git a/src/utils/isdnsync.c b/src/utils/isdnsync.c
new file mode 100644
index 000000000..cc8ff6723
--- /dev/null
+++ b/src/utils/isdnsync.c
@@ -0,0 +1,189 @@
+/* isdnsync.c
+ *
+ * Author       Andreas Eversberg <jolly@eversberg.eu>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include "mISDNif.h"
+#define MISDN_OLD_AF_COMPATIBILITY
+#define AF_COMPATIBILITY_FUNC
+#include "compat_af_isdn.h"
+
+int card = 0;
+int sock = -1;
+
+int mISDN_open(void)
+{
+	int			fd, ret;
+	struct mISDN_devinfo	devinfo;
+	struct sockaddr_mISDN	l2addr;
+
+	fd = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
+	if (fd < 0) {
+		fprintf(stderr, "could not open socket (%s)\n", strerror(errno));
+		return fd;
+	}
+	devinfo.id = card;
+	ret = ioctl(fd, IMGETDEVINFO, &devinfo);
+	if (ret < 0) {
+		fprintf(stderr,"could not send IOCTL IMGETCOUNT (%s)\n", strerror(errno));
+		close(fd);
+		return ret;
+	}
+	close(fd);
+	if (!(devinfo.Dprotocols & (1 << ISDN_P_TE_S0))
+	 && !(devinfo.Dprotocols & (1 << ISDN_P_TE_E1))) {
+		fprintf(stderr,"Interface does not support TE mode (%s)\n", strerror(errno));
+		return ret;
+	}
+	fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_LAPD_TE);
+	if (fd < 0) {
+		fprintf(stderr,"could not open ISDN_P_LAPD_TE socket (%s)\n", strerror(errno));
+		return fd;
+	}
+	l2addr.family = AF_ISDN;
+	l2addr.dev = card;
+	l2addr.channel = 0;
+	l2addr.sapi = 0;
+	l2addr.tei = 0;
+	ret = bind(fd, (struct sockaddr *)&l2addr, sizeof(l2addr));
+	if (ret < 0) {
+		fprintf(stderr,"could not bind socket for card %d (%s)\n", card, strerror(errno));
+		close(fd);
+		return ret;
+	}
+	sock = fd;
+
+	return sock;
+}
+
+
+void mISDN_handle(void)
+{
+	int ret;
+	fd_set rfd;
+	struct timeval tv;
+	struct sockaddr_mISDN addr;
+	socklen_t alen;
+	unsigned char buffer[2048];
+	struct mISDNhead *hh = (struct mISDNhead *)buffer;
+	int l1 = 0, l2 = 0, tei = 0;
+
+	while(1) {
+again:
+		FD_ZERO(&rfd);
+		FD_SET(sock, &rfd);
+		tv.tv_sec = 2;
+		tv.tv_usec = 0;
+		ret = select(sock+1, &rfd, NULL, NULL, &tv);
+		if (ret < 0) {
+			if (errno == EINTR)
+				continue;
+			fprintf(stderr, "%s aborted: %s\n", __FUNCTION__, strerror(errno));
+			break;
+		}
+		if (FD_ISSET(sock, &rfd)) {
+			alen = sizeof(addr);
+			ret = recvfrom(sock, buffer, sizeof(buffer), 0, (struct sockaddr *) &addr, &alen);
+			if (ret < 0) {
+				fprintf(stderr, "%s read socket error %s\n", __FUNCTION__, strerror(errno));
+			} else if (ret < MISDN_HEADER_LEN) {
+					fprintf(stderr, "%s read socket shor frame\n", __FUNCTION__);
+			} else {
+				switch(hh->prim) {
+					case MPH_ACTIVATE_IND:
+					case PH_ACTIVATE_IND:
+						if (!l1) {
+							printf("PH_ACTIVATE\n");
+							printf("*** Sync available from interface :-)\n");
+							l1 = 1;
+						}
+						goto again;
+					break;
+					case MPH_DEACTIVATE_IND:
+					case PH_DEACTIVATE_IND:
+						if (l1) {
+							printf("PH_DEACTIVATE\n");
+							printf("*** Lost sync on interface        :-(\n");
+							l1 = 0;
+						}
+						goto again;
+					break;
+					case DL_ESTABLISH_IND:
+					case DL_ESTABLISH_CNF:
+						printf("DL_ESTABLISH\n");
+						l2 = 1;
+						goto again;
+					break;
+					case DL_RELEASE_IND:
+					case DL_RELEASE_CNF:
+						printf("DL_RELEASE\n");
+						l2 = 0;
+						goto again;
+					break;
+					case DL_INFORMATION_IND:
+						printf("DL_INFORMATION (tei %d sapi %d)\n", addr.tei, addr.sapi);
+						tei = 1;
+					break;
+					default:
+//						printf("prim %x\n", hh->prim);
+						goto again;
+				}
+			}
+		}
+		if (tei && !l2) {
+			hh->prim = DL_ESTABLISH_REQ;
+			printf("-> activating layer 2\n");
+			sendto(sock, buffer, MISDN_HEADER_LEN, 0, (struct sockaddr *) &addr, alen);
+		}
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int ret;
+
+	if (argc <= 1)
+	{
+		printf("Usage: %s <card>\n\n", argv[0]);
+		printf("Opens given card number in TE-mode PTP and tries to keep layer 2 established.\n");
+		printf("This keeps layer 1 activated to retrieve a steady sync signal from network.\n");
+		return(0);
+	}
+
+	card = atoi(argv[1]);
+
+	init_af_isdn();
+
+	if ((ret = mISDN_open() < 0))
+		return(ret);
+
+	mISDN_handle();
+
+	close(sock);
+
+	return 0;
+}