1 files changed, 0 insertions, 458 deletions
diff --git a/openbsc/src/libabis/input/hsl.c b/openbsc/src/libabis/input/hsl.c
deleted file mode 100644
index 7f2e75d62..000000000
--- a/openbsc/src/libabis/input/hsl.c
+++ /dev/null
@@ -1,458 +0,0 @@
-/* OpenBSC Abis input driver for HSL Femto */
-
-/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
- * (C) 2011 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 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/>.
- *
- */
-
-/* HSL uses a much more primitive/simplified version of the IPA multiplex.
- *
- * They have taken out the nice parts like the ID_GET / ID_RESP for resolving
- * the UNIT ID, as well as the keepalive ping/pong messages.  Furthermore, the
- * Stream Identifiers are fixed on the BTS side (RSL always 0, OML always 0xff)
- * and both OML+RSL share a single TCP connection.
- *
- * Other oddities include the encapsulation of BSSGP messages in the L3_INFO IE
- * of RSL
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <time.h>
-#include <sys/fcntl.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <arpa/inet.h>
-
-#include <osmocom/core/select.h>
-#include <osmocom/gsm/tlv.h>
-#include <osmocom/core/msgb.h>
-#include <openbsc/debug.h>
-#include <openbsc/gsm_data.h>
-#include <openbsc/abis_nm.h>
-#include <openbsc/abis_rsl.h>
-#include <openbsc/subchan_demux.h>
-#include <openbsc/e1_input.h>
-#include <openbsc/ipaccess.h>
-#include <openbsc/socket.h>
-#include <openbsc/signal.h>
-#include <osmocom/core/talloc.h>
-
-#define HSL_TCP_PORT	2500
-#define HSL_PROTO_DEBUG	0xdd
-
-#define PRIV_OML 1
-#define PRIV_RSL 2
-
-/* data structure for one E1 interface with A-bis */
-struct hsl_e1_handle {
-	struct osmo_fd listen_fd;
-	struct gsm_network *gsmnet;
-};
-
-static struct hsl_e1_handle *e1h;
-
-
-#define TS1_ALLOC_SIZE	900
-
-#define OML_UP		0x0001
-#define RSL_UP		0x0002
-
-int hsl_drop_oml(struct gsm_bts *bts)
-{
-	struct gsm_bts_trx *trx;
-	struct e1inp_ts *ts;
-	struct e1inp_line *line;
-	struct osmo_fd *bfd;
-
-	if (!bts || !bts->oml_link)
-		return -1;
-
-	/* send OML down */
-	ts = bts->oml_link->ts;
-	line = ts->line;
-	e1inp_event(ts, S_INP_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi);
-
-	bfd = &ts->driver.ipaccess.fd;
-	osmo_fd_unregister(bfd);
-	close(bfd->fd);
-	bfd->fd = -1;
-
-	/* clean up OML and RSL */
-	e1inp_sign_link_destroy(bts->oml_link);
-	bts->oml_link = NULL;
-	e1inp_sign_link_destroy(bts->c0->rsl_link);
-	bts->c0->rsl_link = NULL;
-	bts->ip_access.flags = 0;
-
-	/* kill the E1 line now... as we have no one left to use it */
-	talloc_free(line);
-
-	return -1;
-}
-
-static int hsl_drop_ts_fd(struct e1inp_ts *ts, struct osmo_fd *bfd)
-{
-	struct e1inp_sign_link *link, *link2;
-	int bts_nr = -1;
-
-	llist_for_each_entry_safe(link, link2, &ts->sign.sign_links, list) {
-		bts_nr = link->trx->bts->bts_nr;
-		e1inp_sign_link_destroy(link);
-	}
-
-	osmo_fd_unregister(bfd);
-	close(bfd->fd);
-	bfd->fd = -1;
-
-	talloc_free(ts->line);
-
-	return bts_nr;
-}
-
-struct gsm_bts *find_bts_by_serno(struct gsm_network *net, unsigned long serno)
-{
-	struct gsm_bts *bts;
-
-	llist_for_each_entry(bts, &net->bts_list, list) {
-		if (bts->type != GSM_BTS_TYPE_HSL_FEMTO)
-			continue;
-
-		if (serno == bts->hsl.serno)
-			return bts;
-	}
-
-	return NULL;
-}
-
-
-static int process_hsl_rsl(struct msgb *msg, struct e1inp_line *line)
-{
-	char serno_buf[16];
-	uint8_t serno_len;
-	unsigned long serno;
-	struct gsm_bts *bts;
-
-	switch (msg->l2h[1]) {
-	case 0x80:
-		/*, contains Serial Number + SW version */
-		if (msg->l2h[2] != 0xc0)
-			break;
-		serno_len = msg->l2h[3];
-		if (serno_len > sizeof(serno_buf)-1)
-			serno_len = sizeof(serno_buf)-1;
-		memcpy(serno_buf, msg->l2h+4, serno_len);
-		serno_buf[serno_len] = '\0';
-		serno = strtoul(serno_buf, NULL, 10);
-		bts = find_bts_by_serno(e1h->gsmnet, serno);
-		if (!bts) {
-			LOGP(DINP, LOGL_ERROR, "Unable to find BTS config for "
-				"serial number %lu(%s)\n", serno, serno_buf);
-			return -EIO;
-		}
-
-		DEBUGP(DINP, "Identified HSL BTS Serial Number %lu\n", serno);
-
-		/* we shouldn't hardcode it, but HSL femto also hardcodes it... */
-		bts->oml_tei = 255;
-		bts->c0->rsl_tei = 0;
-		bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
-							E1INP_SIGN_OML, bts->c0,
-							bts->oml_tei, 0);
-		bts->c0->rsl_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
-							E1INP_SIGN_RSL, bts->c0,
-							bts->c0->rsl_tei, 0);
-		e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 255, 0);
-		e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 0, 0);
-		bts->ip_access.flags |= OML_UP;
-		bts->ip_access.flags |= (RSL_UP << 0);
-		msgb_free(msg);
-		return 1;	/* == we have taken over the msg */
-	case 0x82:
-		/* FIXME: do something with BSSGP, i.e. forward it over
-		 * NSIP to OsmoSGSN */
-		msgb_free(msg);
-		return 1;
-	}
-	return 0;
-}
-
-static int handle_ts1_read(struct osmo_fd *bfd)
-{
-	struct e1inp_line *line = bfd->data;
-	unsigned int ts_nr = bfd->priv_nr;
-	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
-	struct e1inp_sign_link *link;
-	struct msgb *msg;
-	struct ipaccess_head *hh;
-	int ret = 0, error;
-
-	msg = ipaccess_read_msg(bfd, &error);
-	if (!msg) {
-		if (error == 0) {
-			int ret = hsl_drop_ts_fd(e1i_ts, bfd);
-			if (ret >= 0)
-				LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n",
-					ret);
-			else
-				LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n");
-		}
-		return error;
-	}
-
-	DEBUGP(DMI, "RX %u: %s\n", ts_nr, osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
-
-	hh = (struct ipaccess_head *) msg->data;
-	if (hh->proto == HSL_PROTO_DEBUG) {
-		LOGP(DINP, LOGL_NOTICE, "HSL debug: %s\n", msg->data + sizeof(*hh));
-		msgb_free(msg);
-		return ret;
-	}
-
-	/* HSL proprietary RSL extension */
-	if (hh->proto == 0 && (msg->l2h[0] == 0x81 || msg->l2h[0] == 0x80)) {
-		ret = process_hsl_rsl(msg, line);
-		if (ret < 0) {
-			/* FIXME: close connection */
-			hsl_drop_ts_fd(e1i_ts, bfd);
-			return ret;
-		} else if (ret == 1)
-			return 0;
-		/* else: continue... */
-	}
-#ifdef HSL_SR_1_0
-	/* HSL for whatever reason chose to use 0x81 instead of 0x80 for FOM */
-	if (hh->proto == 255 && msg->l2h[0] == (ABIS_OM_MDISC_FOM | 0x01))
-		msg->l2h[0] = ABIS_OM_MDISC_FOM;
-#endif
-	link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0);
-	if (!link) {
-		LOGP(DINP, LOGL_ERROR, "no matching signalling link for "
-			"hh->proto=0x%02x\n", hh->proto);
-		msgb_free(msg);
-		return -EIO;
-	}
-	msg->dst = link;
-
-	switch (link->type) {
-	case E1INP_SIGN_RSL:
-		if (!(link->trx->bts->ip_access.flags & (RSL_UP << link->trx->nr))) {
-			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
-			link->trx->bts->ip_access.flags |= (RSL_UP << link->trx->nr);
-		}
-		ret = abis_rsl_rcvmsg(msg);
-		break;
-	case E1INP_SIGN_OML:
-		if (!(link->trx->bts->ip_access.flags & OML_UP)) {
-			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
-			link->trx->bts->ip_access.flags |= OML_UP;
-		}
-		ret = abis_nm_rcvmsg(msg);
-		break;
-	default:
-		LOGP(DINP, LOGL_NOTICE, "Unknown HSL protocol class 0x%02x\n", hh->proto);
-		msgb_free(msg);
-		break;
-	}
-	return ret;
-}
-
-static int ts_want_write(struct e1inp_ts *e1i_ts)
-{
-	e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE;
-
-	return 0;
-}
-
-static void timeout_ts1_write(void *data)
-{
-	struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
-
-	/* trigger write of ts1, due to tx delay timer */
-	ts_want_write(e1i_ts);
-}
-
-static int handle_ts1_write(struct osmo_fd *bfd)
-{
-	struct e1inp_line *line = bfd->data;
-	unsigned int ts_nr = bfd->priv_nr;
-	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
-	struct e1inp_sign_link *sign_link;
-	struct msgb *msg;
-	uint8_t proto;
-	int ret;
-
-	bfd->when &= ~BSC_FD_WRITE;
-
-	/* get the next msg for this timeslot */
-	msg = e1inp_tx_ts(e1i_ts, &sign_link);
-	if (!msg) {
-		/* no message after tx delay timer */
-		return 0;
-	}
-
-	switch (sign_link->type) {
-	case E1INP_SIGN_OML:
-		proto = IPAC_PROTO_OML;
-#ifdef HSL_SR_1_0
-		/* HSL uses 0x81 for FOM for some reason */
-		if (msg->data[0] == ABIS_OM_MDISC_FOM)
-			msg->data[0] = ABIS_OM_MDISC_FOM | 0x01;
-#endif
-		break;
-	case E1INP_SIGN_RSL:
-		proto = IPAC_PROTO_RSL;
-		break;
-	default:
-		msgb_free(msg);
-		bfd->when |= BSC_FD_WRITE; /* come back for more msg */
-		return -EINVAL;
-	}
-
-	msg->l2h = msg->data;
-	ipaccess_prepend_header(msg, sign_link->tei);
-
-	DEBUGP(DMI, "TX %u: %s\n", ts_nr, osmo_hexdump(msg->l2h, msgb_l2len(msg)));
-
-	ret = send(bfd->fd, msg->data, msg->len, 0);
-	msgb_free(msg);
-
-	/* set tx delay timer for next event */
-	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
-	e1i_ts->sign.tx_timer.data = e1i_ts;
-
-	/* Reducing this might break the nanoBTS 900 init. */
-	osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay);
-
-	return ret;
-}
-
-/* callback from select.c in case one of the fd's can be read/written */
-static int hsl_fd_cb(struct osmo_fd *bfd, unsigned int what)
-{
-	struct e1inp_line *line = bfd->data;
-	unsigned int ts_nr = bfd->priv_nr;
-	unsigned int idx = ts_nr-1;
-	struct e1inp_ts *e1i_ts;
-	int rc = 0;
-
-	/* In case of early RSL we might not yet have a line */
-
-	if (line)
-		e1i_ts = &line->ts[idx];
-
-	if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) {
-		if (what & BSC_FD_READ)
-			rc = handle_ts1_read(bfd);
-		if (what & BSC_FD_WRITE)
-			rc = handle_ts1_write(bfd);
-	} else
-		LOGP(DINP, LOGL_ERROR, "unknown E1 TS type %u\n", e1i_ts->type);
-
-	return rc;
-}
-
-struct e1inp_driver hsl_driver = {
-	.name = "HSL",
-	.want_write = ts_want_write,
-	.default_delay = 0,
-};
-
-/* callback of the OML listening filedescriptor */
-static int listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what)
-{
-	int ret;
-	int idx = 0;
-	int i;
-	struct e1inp_line *line;
-	struct e1inp_ts *e1i_ts;
-	struct osmo_fd *bfd;
-	struct sockaddr_in sa;
-	socklen_t sa_len = sizeof(sa);
-
-	if (!(what & BSC_FD_READ))
-		return 0;
-
-	ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
-	if (ret < 0) {
-		perror("accept");
-		return ret;
-	}
-	LOGP(DINP, LOGL_NOTICE, "accept()ed new HSL link from %s\n",
-		inet_ntoa(sa.sin_addr));
-
-	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
-	if (!line) {
-		close(ret);
-		return -ENOMEM;
-	}
-	line->driver = &hsl_driver;
-	//line->driver_data = e1h;
-	/* create virrtual E1 timeslots for signalling */
-	e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
-
-	/* initialize the fds */
-	for (i = 0; i < ARRAY_SIZE(line->ts); ++i)
-		line->ts[i].driver.ipaccess.fd.fd = -1;
-
-	e1i_ts = &line->ts[idx];
-
-	bfd = &e1i_ts->driver.ipaccess.fd;
-	bfd->fd = ret;
-	bfd->data = line;
-	bfd->priv_nr = PRIV_OML;
-	bfd->cb = hsl_fd_cb;
-	bfd->when = BSC_FD_READ;
-	ret = osmo_fd_register(bfd);
-	if (ret < 0) {
-		LOGP(DINP, LOGL_ERROR, "could not register FD\n");
-		close(bfd->fd);
-		talloc_free(line);
-		return ret;
-	}
-
-        return ret;
-	//return e1inp_line_register(line);
-}
-
-int hsl_setup(struct gsm_network *gsmnet)
-{
-	int ret;
-
-	e1h = talloc_zero(tall_bsc_ctx, struct hsl_e1_handle);
-	if (!e1h)
-		return -ENOMEM;
-
-	e1h->gsmnet = gsmnet;
-
-	/* Listen for connections */
-	ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, INADDR_ANY, HSL_TCP_PORT,
-			0, listen_fd_cb, NULL);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-void e1inp_hsl_init(void)
-{
-	e1inp_driver_register(&hsl_driver);
-}