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-rw-r--r--src/libabis/input/misdn.c542
1 files changed, 542 insertions, 0 deletions
diff --git a/src/libabis/input/misdn.c b/src/libabis/input/misdn.c
new file mode 100644
index 00000000..45988791
--- /dev/null
+++ b/src/libabis/input/misdn.c
@@ -0,0 +1,542 @@
+/* OpenBSC Abis input driver for mISDNuser */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ *
+ * 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 <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <mISDNif.h>
+
+//#define AF_COMPATIBILITY_FUNC
+//#include <compat_af_isdn.h>
+#ifndef AF_ISDN
+#define AF_ISDN 34
+#define PF_ISDN AF_ISDN
+#endif
+
+#include <osmocore/select.h>
+#include <osmocore/msgb.h>
+#include <osmocore/talloc.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/signal.h>
+
+#define TS1_ALLOC_SIZE 300
+
+struct prim_name {
+ unsigned int prim;
+ const char *name;
+};
+
+const struct prim_name prim_names[] = {
+ { PH_CONTROL_IND, "PH_CONTROL_IND" },
+ { PH_DATA_IND, "PH_DATA_IND" },
+ { PH_DATA_CNF, "PH_DATA_CNF" },
+ { PH_ACTIVATE_IND, "PH_ACTIVATE_IND" },
+ { DL_ESTABLISH_IND, "DL_ESTABLISH_IND" },
+ { DL_ESTABLISH_CNF, "DL_ESTABLISH_CNF" },
+ { DL_RELEASE_IND, "DL_RELEASE_IND" },
+ { DL_RELEASE_CNF, "DL_RELEASE_CNF" },
+ { DL_DATA_IND, "DL_DATA_IND" },
+ { DL_UNITDATA_IND, "DL_UNITDATA_IND" },
+ { DL_INFORMATION_IND, "DL_INFORMATION_IND" },
+ { MPH_ACTIVATE_IND, "MPH_ACTIVATE_IND" },
+ { MPH_DEACTIVATE_IND, "MPH_DEACTIVATE_IND" },
+};
+
+const char *get_prim_name(unsigned int prim)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(prim_names); i++) {
+ if (prim_names[i].prim == prim)
+ return prim_names[i].name;
+ }
+
+ return "UNKNOWN";
+}
+
+static int handle_ts1_read(struct bsc_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 = msgb_alloc(TS1_ALLOC_SIZE, "mISDN TS1");
+ struct sockaddr_mISDN l2addr;
+ struct mISDNhead *hh;
+ socklen_t alen;
+ int ret;
+
+ if (!msg)
+ return -ENOMEM;
+
+ hh = (struct mISDNhead *) msg->data;
+
+ alen = sizeof(l2addr);
+ ret = recvfrom(bfd->fd, msg->data, 300, 0,
+ (struct sockaddr *) &l2addr, &alen);
+ if (ret < 0) {
+ fprintf(stderr, "recvfrom error %s\n", strerror(errno));
+ return ret;
+ }
+
+ if (alen != sizeof(l2addr)) {
+ fprintf(stderr, "%s error len\n", __func__);
+ return -EINVAL;
+ }
+
+ msgb_put(msg, ret);
+
+ DEBUGP(DMI, "alen =%d, dev(%d) channel(%d) sapi(%d) tei(%d)\n",
+ alen, l2addr.dev, l2addr.channel, l2addr.sapi, l2addr.tei);
+
+ DEBUGP(DMI, "<= len = %d, prim(0x%x) id(0x%x): %s\n",
+ ret, hh->prim, hh->id, get_prim_name(hh->prim));
+
+ switch (hh->prim) {
+ case DL_INFORMATION_IND:
+ /* mISDN tells us which channel number is allocated for this
+ * tuple of (SAPI, TEI). */
+ DEBUGP(DMI, "DL_INFORMATION_IND: use channel(%d) sapi(%d) tei(%d) for now\n",
+ l2addr.channel, l2addr.sapi, l2addr.tei);
+ link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi);
+ if (!link) {
+ DEBUGPC(DMI, "mISDN message for unknown sign_link\n");
+ msgb_free(msg);
+ return -EINVAL;
+ }
+ /* save the channel number in the driver private struct */
+ link->driver.misdn.channel = l2addr.channel;
+ break;
+ case DL_ESTABLISH_IND:
+ DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n",
+ l2addr.channel, l2addr.sapi, l2addr.tei);
+ /* For some strange reason, sometimes the DL_INFORMATION_IND tells
+ * us the wrong channel, and we only get the real channel number
+ * during the DL_ESTABLISH_IND */
+ link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi);
+ if (!link) {
+ DEBUGPC(DMI, "mISDN message for unknown sign_link\n");
+ msgb_free(msg);
+ return -EINVAL;
+ }
+ /* save the channel number in the driver private struct */
+ link->driver.misdn.channel = l2addr.channel;
+ ret = e1inp_event(e1i_ts, S_INP_TEI_UP, l2addr.tei, l2addr.sapi);
+ break;
+ case DL_RELEASE_IND:
+ DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n",
+ l2addr.channel, l2addr.sapi, l2addr.tei);
+ ret = e1inp_event(e1i_ts, S_INP_TEI_DN, l2addr.tei, l2addr.sapi);
+ break;
+ case DL_DATA_IND:
+ case DL_UNITDATA_IND:
+ msg->l2h = msg->data + MISDN_HEADER_LEN;
+ DEBUGP(DMI, "RX: %s\n", hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
+ ret = e1inp_rx_ts(e1i_ts, msg, l2addr.tei, l2addr.sapi);
+ break;
+ case PH_ACTIVATE_IND:
+ DEBUGP(DMI, "PH_ACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
+ l2addr.channel, l2addr.sapi, l2addr.tei);
+ break;
+ case PH_DEACTIVATE_IND:
+ DEBUGP(DMI, "PH_DEACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
+ l2addr.channel, l2addr.sapi, l2addr.tei);
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static int ts_want_write(struct e1inp_ts *e1i_ts)
+{
+ /* We never include the mISDN B-Channel FD into the
+ * writeset, since it doesn't support poll() based
+ * write flow control */
+ if (e1i_ts->type == E1INP_TS_TYPE_TRAU)
+ return 0;
+
+ e1i_ts->driver.misdn.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 bsc_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 sockaddr_mISDN sa;
+ struct msgb *msg;
+ struct mISDNhead *hh;
+ u_int8_t *l2_data;
+ 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;
+ }
+
+ l2_data = msg->data;
+
+ /* prepend the mISDNhead */
+ hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh));
+ hh->prim = DL_DATA_REQ;
+
+ DEBUGP(DMI, "TX channel(%d) TEI(%d) SAPI(%d): %s\n",
+ sign_link->driver.misdn.channel, sign_link->tei,
+ sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN));
+
+ /* construct the sockaddr */
+ sa.family = AF_ISDN;
+ sa.sapi = sign_link->sapi;
+ sa.dev = sign_link->tei;
+ sa.channel = sign_link->driver.misdn.channel;
+
+ ret = sendto(bfd->fd, msg->data, msg->len, 0,
+ (struct sockaddr *)&sa, sizeof(sa));
+ if (ret < 0)
+ fprintf(stderr, "%s sendto failed %d\n", __func__, ret);
+ 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;
+ bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay);
+
+ return ret;
+}
+
+#define BCHAN_TX_GRAN 160
+/* write to a B channel TS */
+static int handle_tsX_write(struct bsc_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 mISDNhead *hh;
+ u_int8_t tx_buf[BCHAN_TX_GRAN + sizeof(*hh)];
+ struct subch_mux *mx = &e1i_ts->trau.mux;
+ int ret;
+
+ hh = (struct mISDNhead *) tx_buf;
+ hh->prim = PH_DATA_REQ;
+
+ subchan_mux_out(mx, tx_buf+sizeof(*hh), BCHAN_TX_GRAN);
+
+ DEBUGP(DMIB, "BCHAN TX: %s\n",
+ hexdump(tx_buf+sizeof(*hh), BCHAN_TX_GRAN));
+
+ ret = send(bfd->fd, tx_buf, sizeof(*hh) + BCHAN_TX_GRAN, 0);
+ if (ret < sizeof(*hh) + BCHAN_TX_GRAN)
+ DEBUGP(DMIB, "send returns %d instead of %zu\n", ret,
+ sizeof(*hh) + BCHAN_TX_GRAN);
+
+ return ret;
+}
+
+#define TSX_ALLOC_SIZE 4096
+/* FIXME: read from a B channel TS */
+static int handle_tsX_read(struct bsc_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 msgb *msg = msgb_alloc(TSX_ALLOC_SIZE, "mISDN TSx");
+ struct mISDNhead *hh;
+ int ret;
+
+ if (!msg)
+ return -ENOMEM;
+
+ hh = (struct mISDNhead *) msg->data;
+
+ ret = recv(bfd->fd, msg->data, TSX_ALLOC_SIZE, 0);
+ if (ret < 0) {
+ fprintf(stderr, "recvfrom error %s\n", strerror(errno));
+ return ret;
+ }
+
+ msgb_put(msg, ret);
+
+ if (hh->prim != PH_CONTROL_IND)
+ DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n",
+ ret, hh->prim, hh->id, get_prim_name(hh->prim));
+
+ switch (hh->prim) {
+ case PH_DATA_IND:
+ msg->l2h = msg->data + MISDN_HEADER_LEN;
+ DEBUGP(DMIB, "BCHAN RX: %s\n",
+ hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
+ ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
+ break;
+ case PH_ACTIVATE_IND:
+ case PH_DATA_CNF:
+ /* physical layer indicates that data has been sent,
+ * we thus can send some more data */
+ ret = handle_tsX_write(bfd);
+ default:
+ break;
+ }
+ /* FIXME: why do we free signalling msgs in the caller, and trau not? */
+ msgb_free(msg);
+
+ return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int misdn_fd_cb(struct bsc_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 = &line->ts[idx];
+ int rc = 0;
+
+ switch (e1i_ts->type) {
+ case E1INP_TS_TYPE_SIGN:
+ if (what & BSC_FD_READ)
+ rc = handle_ts1_read(bfd);
+ if (what & BSC_FD_WRITE)
+ rc = handle_ts1_write(bfd);
+ break;
+ case E1INP_TS_TYPE_TRAU:
+ if (what & BSC_FD_READ)
+ rc = handle_tsX_read(bfd);
+ /* We never include the mISDN B-Channel FD into the
+ * writeset, since it doesn't support poll() based
+ * write flow control */
+ break;
+ default:
+ fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type);
+ break;
+ }
+
+ return rc;
+}
+
+static int activate_bchan(struct e1inp_line *line, int ts, int act)
+{
+ struct mISDNhead hh;
+ int ret;
+ unsigned int idx = ts-1;
+ struct e1inp_ts *e1i_ts = &line->ts[idx];
+ struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
+
+ fprintf(stdout, "activate bchan\n");
+ if (act)
+ hh.prim = PH_ACTIVATE_REQ;
+ else
+ hh.prim = PH_DEACTIVATE_REQ;
+
+ hh.id = MISDN_ID_ANY;
+ ret = sendto(bfd->fd, &hh, sizeof(hh), 0, NULL, 0);
+ if (ret < 0) {
+ fprintf(stdout, "could not send ACTIVATE_RQ %s\n",
+ strerror(errno));
+ }
+
+ return ret;
+}
+
+static int mi_e1_line_update(struct e1inp_line *line);
+
+struct e1inp_driver misdn_driver = {
+ .name = "misdn",
+ .want_write = ts_want_write,
+ .default_delay = 50000,
+ .line_update = &mi_e1_line_update,
+};
+
+static int mi_e1_setup(struct e1inp_line *line, int release_l2)
+{
+ int ts, ret;
+
+ /* TS0 is CRC4, don't need any fd for it */
+ for (ts = 1; ts < NUM_E1_TS; ts++) {
+ unsigned int idx = ts-1;
+ struct e1inp_ts *e1i_ts = &line->ts[idx];
+ struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
+ struct sockaddr_mISDN addr;
+
+ bfd->data = line;
+ bfd->priv_nr = ts;
+ bfd->cb = misdn_fd_cb;
+
+ switch (e1i_ts->type) {
+ case E1INP_TS_TYPE_NONE:
+ continue;
+ break;
+ case E1INP_TS_TYPE_SIGN:
+ bfd->fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_LAPD_NT);
+ bfd->when = BSC_FD_READ;
+ break;
+ case E1INP_TS_TYPE_TRAU:
+ bfd->fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
+ /* We never include the mISDN B-Channel FD into the
+ * writeset, since it doesn't support poll() based
+ * write flow control */
+ bfd->when = BSC_FD_READ;
+ break;
+ }
+
+ if (bfd->fd < 0) {
+ fprintf(stderr, "%s could not open socket %s\n",
+ __func__, strerror(errno));
+ return bfd->fd;
+ }
+
+ memset(&addr, 0, sizeof(addr));
+ addr.family = AF_ISDN;
+ addr.dev = line->num;
+ switch (e1i_ts->type) {
+ case E1INP_TS_TYPE_SIGN:
+ addr.channel = 0;
+ /* SAPI not supported yet in kernel */
+ //addr.sapi = e1inp_ts->sign.sapi;
+ addr.sapi = 0;
+ addr.tei = GROUP_TEI;
+ break;
+ case E1INP_TS_TYPE_TRAU:
+ addr.channel = ts;
+ break;
+ default:
+ DEBUGP(DMI, "unsupported E1 TS type: %u\n",
+ e1i_ts->type);
+ break;
+ }
+
+ ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
+ if (ret < 0) {
+ fprintf(stderr, "could not bind l2 socket %s\n",
+ strerror(errno));
+ return -EIO;
+ }
+
+ if (e1i_ts->type == E1INP_TS_TYPE_SIGN) {
+ ret = ioctl(bfd->fd, IMCLEAR_L2, &release_l2);
+ if (ret < 0) {
+ fprintf(stderr, "could not send IOCTL IMCLEAN_L2 %s\n", strerror(errno));
+ return -EIO;
+ }
+ }
+
+ /* FIXME: only activate B-Channels once we start to
+ * use them to conserve CPU power */
+ if (e1i_ts->type == E1INP_TS_TYPE_TRAU)
+ activate_bchan(line, ts, 1);
+
+ ret = bsc_register_fd(bfd);
+ if (ret < 0) {
+ fprintf(stderr, "could not register FD: %s\n",
+ strerror(ret));
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int mi_e1_line_update(struct e1inp_line *line)
+{
+ struct mISDN_devinfo devinfo;
+ int sk, ret, cnt;
+
+ if (line->driver != &misdn_driver)
+ return -EINVAL;
+
+ /* open the ISDN card device */
+ sk = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
+ if (sk < 0) {
+ fprintf(stderr, "%s could not open socket %s\n",
+ __func__, strerror(errno));
+ return sk;
+ }
+
+ ret = ioctl(sk, IMGETCOUNT, &cnt);
+ if (ret) {
+ fprintf(stderr, "%s error getting interf count: %s\n",
+ __func__, strerror(errno));
+ close(sk);
+ return -ENODEV;
+ }
+ //DEBUGP(DMI,"%d device%s found\n", cnt, (cnt==1)?"":"s");
+ printf("%d device%s found\n", cnt, (cnt==1)?"":"s");
+#if 1
+ devinfo.id = line->num;
+ ret = ioctl(sk, IMGETDEVINFO, &devinfo);
+ if (ret < 0) {
+ fprintf(stdout, "error getting info for device %d: %s\n",
+ line->num, strerror(errno));
+ return -ENODEV;
+ }
+ fprintf(stdout, " id: %d\n", devinfo.id);
+ fprintf(stdout, " Dprotocols: %08x\n", devinfo.Dprotocols);
+ fprintf(stdout, " Bprotocols: %08x\n", devinfo.Bprotocols);
+ fprintf(stdout, " protocol: %d\n", devinfo.protocol);
+ fprintf(stdout, " nrbchan: %d\n", devinfo.nrbchan);
+ fprintf(stdout, " name: %s\n", devinfo.name);
+#endif
+
+ if (!(devinfo.Dprotocols & (1 << ISDN_P_NT_E1))) {
+ fprintf(stderr, "error: card is not of type E1 (NT-mode)\n");
+ return -EINVAL;
+ }
+
+ ret = mi_e1_setup(line, 1);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+void e1inp_misdn_init(void)
+{
+ /* register the driver with the core */
+ e1inp_driver_register(&misdn_driver);
+}