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-rw-r--r--openbsc/src/libabis/input/dahdi.c527
1 files changed, 0 insertions, 527 deletions
diff --git a/openbsc/src/libabis/input/dahdi.c b/openbsc/src/libabis/input/dahdi.c
deleted file mode 100644
index 6802a1e8..00000000
--- a/openbsc/src/libabis/input/dahdi.c
+++ /dev/null
@@ -1,527 +0,0 @@
-/* OpenBSC Abis input driver for DAHDI */
-
-/* (C) 2008-2011 by Harald Welte <laforge@gnumonks.org>
- * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2010 by Digium and Matthew Fredrickson <creslin@digium.com>
- *
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-
-#include "../../../bscconfig.h"
-
-#ifdef HAVE_DAHDI_USER_H
-
-#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 <dahdi/user.h>
-
-#include <osmocom/core/select.h>
-#include <osmocom/core/msgb.h>
-#include <osmocom/core/rate_ctr.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>
-#include <osmocom/core/talloc.h>
-
-#include "lapd.h"
-
-#define TS1_ALLOC_SIZE 300
-
-/* Corresponds to dahdi/user.h, only PRI related events */
-static const struct value_string dahdi_evt_names[] = {
- { DAHDI_EVENT_NONE, "NONE" },
- { DAHDI_EVENT_ALARM, "ALARM" },
- { DAHDI_EVENT_NOALARM, "NOALARM" },
- { DAHDI_EVENT_ABORT, "HDLC ABORT" },
- { DAHDI_EVENT_OVERRUN, "HDLC OVERRUN" },
- { DAHDI_EVENT_BADFCS, "HDLC BAD FCS" },
- { DAHDI_EVENT_REMOVED, "REMOVED" },
- { 0, NULL }
-};
-
-static void handle_dahdi_exception(struct e1inp_ts *ts)
-{
- int rc, evt;
- struct e1inp_line *line = ts->line;
- struct input_signal_data isd;
-
- rc = ioctl(ts->driver.dahdi.fd.fd, DAHDI_GETEVENT, &evt);
- if (rc < 0)
- return;
-
- LOGP(DMI, LOGL_NOTICE, "Line %u(%s) / TS %u DAHDI EVENT %s\n",
- ts->line->num, ts->line->name, ts->num,
- get_value_string(dahdi_evt_names, evt));
-
- isd.line = ts->line;
-
- switch (evt) {
- case DAHDI_EVENT_ALARM:
- /* we should notify the code that the line is gone */
- osmo_signal_dispatch(SS_INPUT, S_INP_LINE_ALARM, &isd);
- rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_ALARM]);
- break;
- case DAHDI_EVENT_NOALARM:
- /* alarm has gone, we should re-start the SABM requests */
- osmo_signal_dispatch(SS_INPUT, S_INP_LINE_NOALARM, &isd);
- break;
- case DAHDI_EVENT_ABORT:
- rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_ABORT]);
- break;
- case DAHDI_EVENT_OVERRUN:
- rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_OVERR]);
- break;
- case DAHDI_EVENT_BADFCS:
- rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_BADFCS]);
- break;
- case DAHDI_EVENT_REMOVED:
- rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_REMOVED]);
- break;
- }
-}
-
-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 msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI TS1");
- lapd_mph_type prim;
- unsigned int sapi, tei;
- int ilen, ret, error = 0;
- uint8_t *idata;
-
- if (!msg)
- return -ENOMEM;
-
- ret = read(bfd->fd, msg->data, TS1_ALLOC_SIZE - 16);
- if (ret == -1)
- handle_dahdi_exception(e1i_ts);
- else if (ret < 0) {
- perror("read ");
- }
- msgb_put(msg, ret - 2);
- if (ret <= 3) {
- perror("read ");
- }
-
- sapi = msg->data[0] >> 2;
- tei = msg->data[1] >> 1;
-
- DEBUGP(DMI, "<= len = %d, sapi(%d) tei(%d)", ret, sapi, tei);
-
- idata = lapd_receive(e1i_ts->driver.dahdi.lapd, msg->data, msg->len, &ilen, &prim, &error);
- if (!idata) {
- switch(error) {
- case LAPD_ERR_UNKNOWN_TEI:
- /* We don't know about this TEI, probably the BSC
- * lost local states (it crashed or it was stopped),
- * notify the driver to see if it can do anything to
- * recover the existing signalling links with the BTS.
- */
- e1inp_event(e1i_ts, S_INP_TEI_UNKNOWN, tei, sapi);
- return -EIO;
- }
- if (prim == 0)
- return -EIO;
- }
-
- msgb_pull(msg, 2);
-
- DEBUGP(DMI, "prim %08x\n", prim);
-
- switch (prim) {
- case 0:
- break;
- case LAPD_MPH_ACTIVATE_IND:
- DEBUGP(DMI, "MPH_ACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei);
- ret = e1inp_event(e1i_ts, S_INP_TEI_UP, tei, sapi);
- break;
- case LAPD_MPH_DEACTIVATE_IND:
- DEBUGP(DMI, "MPH_DEACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei);
- ret = e1inp_event(e1i_ts, S_INP_TEI_DN, tei, sapi);
- break;
- case LAPD_DL_DATA_IND:
- case LAPD_DL_UNITDATA_IND:
- if (prim == LAPD_DL_DATA_IND)
- msg->l2h = msg->data + 2;
- else
- msg->l2h = msg->data + 1;
- DEBUGP(DMI, "RX: %s\n", osmo_hexdump(msgb_l2(msg), ret));
- ret = e1inp_rx_ts(e1i_ts, msg, tei, sapi);
- break;
- default:
- printf("ERROR: unknown prim\n");
- break;
- }
-
- DEBUGP(DMI, "Returned ok\n");
- return ret;
-}
-
-static int ts_want_write(struct e1inp_ts *e1i_ts)
-{
- /* We never include the DAHDI B-Channel FD into the
- * writeset, since it doesn't support poll() based
- * write flow control */
- if (e1i_ts->type == E1INP_TS_TYPE_TRAU) {
- fprintf(stderr, "Trying to write TRAU ts\n");
- return 0;
- }
-
- e1i_ts->driver.dahdi.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 void dahdi_write_msg(uint8_t *data, int len, void *cbdata)
-{
- struct osmo_fd *bfd = cbdata;
- struct e1inp_line *line = bfd->data;
- unsigned int ts_nr = bfd->priv_nr;
- struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
- int ret;
-
- ret = write(bfd->fd, data, len + 2);
- if (ret == -1)
- handle_dahdi_exception(e1i_ts);
- else if (ret < 0)
- LOGP(DMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret);
-}
-
-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;
-
- 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;
- }
-
- DEBUGP(DMI, "TX: %s\n", osmo_hexdump(msg->data, msg->len));
- lapd_transmit(e1i_ts->driver.dahdi.lapd, sign_link->tei,
- sign_link->sapi, msg->data, msg->len);
- 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;
- osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, 50000);
-
- return 0;
-}
-
-
-static int invertbits = 1;
-
-static uint8_t flip_table[256];
-
-static void init_flip_bits(void)
-{
- int i,k;
-
- for (i = 0 ; i < 256 ; i++) {
- uint8_t sample = 0 ;
- for (k = 0; k<8; k++) {
- if ( i & 1 << k ) sample |= 0x80 >> k;
- }
- flip_table[i] = sample;
- }
-}
-
-static uint8_t * flip_buf_bits ( uint8_t * buf , int len)
-{
- int i;
- uint8_t * start = buf;
-
- for (i = 0 ; i < len; i++) {
- buf[i] = flip_table[(uint8_t)buf[i]];
- }
-
- return start;
-}
-
-#define D_BCHAN_TX_GRAN 160
-/* write to a B channel TS */
-static int handle_tsX_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];
- uint8_t tx_buf[D_BCHAN_TX_GRAN];
- struct subch_mux *mx = &e1i_ts->trau.mux;
- int ret;
-
- ret = subchan_mux_out(mx, tx_buf, D_BCHAN_TX_GRAN);
-
- if (ret != D_BCHAN_TX_GRAN) {
- fprintf(stderr, "Huh, got ret of %d\n", ret);
- if (ret < 0)
- return ret;
- }
-
- DEBUGP(DMIB, "BCHAN TX: %s\n",
- osmo_hexdump(tx_buf, D_BCHAN_TX_GRAN));
-
- if (invertbits) {
- flip_buf_bits(tx_buf, ret);
- }
-
- ret = write(bfd->fd, tx_buf, ret);
- if (ret < D_BCHAN_TX_GRAN)
- fprintf(stderr, "send returns %d instead of %d\n", ret,
- D_BCHAN_TX_GRAN);
-
- return ret;
-}
-
-#define D_TSX_ALLOC_SIZE (D_BCHAN_TX_GRAN)
-/* FIXME: read from a B channel TS */
-static int handle_tsX_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 msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI TSx");
- int ret;
-
- if (!msg)
- return -ENOMEM;
-
- ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE);
- if (ret < 0 || ret != D_TSX_ALLOC_SIZE) {
- fprintf(stderr, "read error %d %s\n", ret, strerror(errno));
- return ret;
- }
-
- if (invertbits) {
- flip_buf_bits(msg->data, ret);
- }
-
- msgb_put(msg, ret);
-
- msg->l2h = msg->data;
- DEBUGP(DMIB, "BCHAN RX: %s\n",
- osmo_hexdump(msgb_l2(msg), ret));
- ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
- /* physical layer indicates that data has been sent,
- * we thus can send some more data */
- ret = handle_tsX_write(bfd);
- msgb_free(msg);
-
- return ret;
-}
-
-/* callback from select.c in case one of the fd's can be read/written */
-static int dahdi_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 = &line->ts[idx];
- int rc = 0;
-
- switch (e1i_ts->type) {
- case E1INP_TS_TYPE_SIGN:
- if (what & BSC_FD_EXCEPT)
- handle_dahdi_exception(e1i_ts);
- 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_EXCEPT)
- handle_dahdi_exception(e1i_ts);
- if (what & BSC_FD_READ)
- rc = handle_tsX_read(bfd);
- if (what & BSC_FD_WRITE)
- rc = handle_tsX_write(bfd);
- /* We never include the DAHDI 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 dahdi_e1_line_update(struct e1inp_line *line);
-
-struct e1inp_driver dahdi_driver = {
- .name = "dahdi",
- .want_write = ts_want_write,
- .line_update = &dahdi_e1_line_update,
-};
-
-void dahdi_set_bufinfo(int fd, int as_sigchan)
-{
- struct dahdi_bufferinfo bi;
- int x = 0;
-
- if (ioctl(fd, DAHDI_GET_BUFINFO, &bi)) {
- fprintf(stderr, "Error getting bufinfo\n");
- exit(-1);
- }
-
- if (as_sigchan) {
- bi.numbufs = 4;
- bi.bufsize = 512;
- } else {
- bi.numbufs = 8;
- bi.bufsize = D_BCHAN_TX_GRAN;
- bi.txbufpolicy = DAHDI_POLICY_WHEN_FULL;
- }
-
- if (ioctl(fd, DAHDI_SET_BUFINFO, &bi)) {
- fprintf(stderr, "Error setting bufinfo\n");
- exit(-1);
- }
-
- if (!as_sigchan) {
- if (ioctl(fd, DAHDI_AUDIOMODE, &x)) {
- fprintf(stderr, "Error setting bufinfo\n");
- exit(-1);
- }
- } else {
- int one = 1;
- ioctl(fd, DAHDI_HDLCFCSMODE, &one);
- /* we cannot reliably check for the ioctl return value here
- * as this command will fail if the slot _already_ was a
- * signalling slot before :( */
- }
-}
-
-static int dahdi_e1_setup(struct e1inp_line *line)
-{
- 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;
- char openstr[128];
- struct e1inp_ts *e1i_ts = &line->ts[idx];
- struct osmo_fd *bfd = &e1i_ts->driver.dahdi.fd;
- int dev_nr;
-
- /* DAHDI device names/numbers just keep incrementing
- * even over multiple boards. So TS1 of the second
- * board will be 32 */
- dev_nr = line->num * (NUM_E1_TS-1) + ts;
-
- bfd->data = line;
- bfd->priv_nr = ts;
- bfd->cb = dahdi_fd_cb;
- snprintf(openstr, sizeof(openstr), "/dev/dahdi/%d", dev_nr);
-
- switch (e1i_ts->type) {
- case E1INP_TS_TYPE_NONE:
- continue;
- break;
- case E1INP_TS_TYPE_SIGN:
- bfd->fd = open(openstr, O_RDWR | O_NONBLOCK);
- if (bfd->fd == -1) {
- fprintf(stderr, "%s could not open %s %s\n",
- __func__, openstr, strerror(errno));
- exit(-1);
- }
- bfd->when = BSC_FD_READ | BSC_FD_EXCEPT;
- dahdi_set_bufinfo(bfd->fd, 1);
- e1i_ts->driver.dahdi.lapd = lapd_instance_alloc(1, dahdi_write_msg, bfd);
- break;
- case E1INP_TS_TYPE_TRAU:
- bfd->fd = open(openstr, O_RDWR | O_NONBLOCK);
- if (bfd->fd == -1) {
- fprintf(stderr, "%s could not open %s %s\n",
- __func__, openstr, strerror(errno));
- exit(-1);
- }
- dahdi_set_bufinfo(bfd->fd, 0);
- /* We never include the DAHDI B-Channel FD into the
- * writeset, since it doesn't support poll() based
- * write flow control */
- bfd->when = BSC_FD_READ | BSC_FD_EXCEPT;// | BSC_FD_WRITE;
- break;
- }
-
- if (bfd->fd < 0) {
- fprintf(stderr, "%s could not open %s %s\n",
- __func__, openstr, strerror(errno));
- return bfd->fd;
- }
-
- ret = osmo_fd_register(bfd);
- if (ret < 0) {
- fprintf(stderr, "could not register FD: %s\n",
- strerror(ret));
- return ret;
- }
- }
-
- return 0;
-}
-
-static int dahdi_e1_line_update(struct e1inp_line *line)
-{
- if (line->driver != &dahdi_driver)
- return -EINVAL;
-
- return dahdi_e1_setup(line);
-}
-
-int e1inp_dahdi_init(void)
-{
- init_flip_bits();
-
- /* register the driver with the core */
- return e1inp_driver_register(&dahdi_driver);
-}
-
-#endif /* HAVE_DAHDI_USER_H */