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-rw-r--r--openbsc/src/libabis/input/hsl.c458
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 7f2e75d6..00000000
--- 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);
-}