738 lines
18 KiB
C
738 lines
18 KiB
C
/* OpenBSC Abis input driver for DAHDI */
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/* (C) 2008-2019 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010 by Digium and Matthew Fredrickson <creslin@digium.com>
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*
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* All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include "config.h"
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#include "internal.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <time.h>
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#include <sys/fcntl.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <arpa/inet.h>
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#include <dahdi/user.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/signal.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/vty/vty.h>
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#include <osmocom/abis/subchan_demux.h>
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#include <osmocom/abis/e1_input.h>
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#include <osmocom/abis/lapd.h>
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#define TS1_ALLOC_SIZE 300
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struct span_cfg {
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struct llist_head list;
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unsigned int span_nr;
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unsigned int chan_base;
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unsigned int chan_num;
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};
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static struct span_cfg *span_cfgs[DAHDI_MAX_SPANS];
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static int reread_span_cfgs(void)
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{
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struct dahdi_spaninfo si;
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unsigned int basechan = 1;
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int span_nr;
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int fd;
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if ((fd = open("/dev/dahdi/ctl", O_RDWR)) < 0) {
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LOGP(DLMI, LOGL_ERROR, "Unable to open DAHDI ctl: %s\n",
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strerror(errno));
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return -EIO;
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}
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for (span_nr = 1; span_nr < DAHDI_MAX_SPANS; span_nr++) {
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struct span_cfg *scfg;
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/* our array index starts at 0, but DAHDI span at 1 */
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int i = span_nr - 1;
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/* clear any old cached information */
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if (span_cfgs[i]) {
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talloc_free(span_cfgs[i]);
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span_cfgs[i] = NULL;
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}
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memset(&si, 0, sizeof(si));
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si.spanno = span_nr;
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if (ioctl(fd, DAHDI_SPANSTAT, &si))
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continue;
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/* create and link new span_cfg */
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scfg = talloc_zero(NULL, struct span_cfg);
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if (!scfg) {
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close(fd);
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return -ENOMEM;
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}
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scfg->span_nr = span_nr;
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scfg->chan_num = si.totalchans;
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scfg->chan_base = basechan;
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span_cfgs[i] = scfg;
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basechan += si.totalchans;
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}
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close(fd);
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return 0;
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}
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/* Corresponds to dahdi/user.h, only PRI related events */
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static const struct value_string dahdi_evt_names[] = {
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{ DAHDI_EVENT_NONE, "NONE" },
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{ DAHDI_EVENT_ALARM, "ALARM" },
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{ DAHDI_EVENT_NOALARM, "NOALARM" },
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{ DAHDI_EVENT_ABORT, "HDLC ABORT" },
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{ DAHDI_EVENT_OVERRUN, "HDLC OVERRUN" },
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{ DAHDI_EVENT_BADFCS, "HDLC BAD FCS" },
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{ DAHDI_EVENT_REMOVED, "REMOVED" },
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{ 0, NULL }
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};
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static void handle_dahdi_exception(struct e1inp_ts *ts)
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{
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int rc, evt;
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struct e1inp_line *line = ts->line;
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struct input_signal_data isd;
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rc = ioctl(ts->driver.dahdi.fd.fd, DAHDI_GETEVENT, &evt);
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if (rc < 0)
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return;
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LOGPITS(ts, DLMI, LOGL_NOTICE, "Line %u(%s) / TS %u DAHDI EVENT %s\n",
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ts->line->num, ts->line->name, ts->num,
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get_value_string(dahdi_evt_names, evt));
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isd.line = ts->line;
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isd.ts_nr = ts->num;
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switch (evt) {
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case DAHDI_EVENT_ALARM:
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/* we should notify the code that the line is gone */
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osmo_signal_dispatch(SS_L_INPUT, S_L_INP_LINE_ALARM, &isd);
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rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_ALARM]);
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break;
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case DAHDI_EVENT_NOALARM:
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/* alarm has gone, we should re-start the SABM requests */
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osmo_signal_dispatch(SS_L_INPUT, S_L_INP_LINE_NOALARM, &isd);
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break;
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case DAHDI_EVENT_ABORT:
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rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_ABORT]);
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break;
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case DAHDI_EVENT_OVERRUN:
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rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_OVERR]);
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break;
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case DAHDI_EVENT_BADFCS:
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rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_BADFCS]);
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break;
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case DAHDI_EVENT_REMOVED:
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rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_REMOVED]);
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break;
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}
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}
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static int handle_ts1_read(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI TS1");
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int ret;
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if (!msg)
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return -ENOMEM;
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ret = read(bfd->fd, msg->data, TS1_ALLOC_SIZE - 16);
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if (ret == -1)
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handle_dahdi_exception(e1i_ts);
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else if (ret < 0) {
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LOGPITS(e1i_ts, DLMI, LOGL_ERROR, "%s read failed %d (%s)\n", __func__, ret, strerror(errno));
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return ret;
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}
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msgb_put(msg, ret - 2);
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if (ret <= 3) {
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LOGPITS(e1i_ts, DLMI, LOGL_ERROR, "%s read failed %d (%s)\n", __func__, ret, strerror(errno));
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return ret;
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}
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return e1inp_rx_ts_lapd(e1i_ts, msg);
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}
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static int ts_want_write(struct e1inp_ts *e1i_ts)
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{
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/* We never include the DAHDI B-Channel FD into the
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* writeset, since it doesn't support poll() based
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* write flow control */
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if (e1i_ts->type == E1INP_TS_TYPE_TRAU) {
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "Trying to write TRAU ts\n");
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return 0;
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}
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e1i_ts->driver.dahdi.fd.when |= OSMO_FD_WRITE;
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return 0;
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}
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static void timeout_ts1_write(void *data)
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{
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struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
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/* trigger write of ts1, due to tx delay timer */
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ts_want_write(e1i_ts);
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}
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static void dahdi_write_msg(struct msgb *msg, void *cbdata)
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{
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struct osmo_fd *bfd = cbdata;
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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int ret;
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if (msgb_tailroom(msg) >= 2) {
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/* two bytes of space for the FCS added by DAHDI in the kernel */
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msgb_put(msg, 2);
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ret = write(bfd->fd, msg->data, msg->len);
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} else {
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/* work-around for code that sends us messages with no tailroom (OS#4644) */
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uint8_t buf[msg->len + 2];
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memcpy(buf, msg->data, msg->len);
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ret = write(bfd->fd, buf, sizeof(buf));
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}
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msgb_free(msg);
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if (ret == -1)
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handle_dahdi_exception(e1i_ts);
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else if (ret < 0)
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LOGPITS(e1i_ts, DLMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret);
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}
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static int handle_ts1_write(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct e1inp_sign_link *sign_link;
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struct msgb *msg;
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bfd->when &= ~OSMO_FD_WRITE;
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/* get the next msg for this timeslot */
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msg = e1inp_tx_ts(e1i_ts, &sign_link);
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if (!msg) {
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/* no message after tx delay timer */
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return 0;
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}
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LOGPITS(e1i_ts, DLMI, LOGL_ERROR, "TX: %s\n", osmo_hexdump(msg->data, msg->len));
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lapd_transmit(e1i_ts->lapd, sign_link->tei,
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sign_link->sapi, msg);
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/* set tx delay timer for next event */
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osmo_timer_setup(&e1i_ts->sign.tx_timer, timeout_ts1_write, e1i_ts);
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osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, 50000);
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return 0;
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}
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static void handle_hdlc_write(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg;
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int ret;
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/* get the next msg for this timeslot */
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msg = e1inp_tx_ts(e1i_ts, NULL);
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if (!msg)
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return;
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if (msgb_tailroom(msg) >= 2) {
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/* two bytes of space for the FCS added by DAHDI in the kernel */
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msgb_put(msg, 2);
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ret = write(bfd->fd, msg->data, msg->len);
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} else {
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/* work-around for code that sends us messages with no tailroom (OS#4644) */
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uint8_t buf[msg->len + 2];
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memcpy(buf, msg->data, msg->len);
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ret = write(bfd->fd, buf, sizeof(buf));
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}
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msgb_free(msg);
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if (ret == -1)
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handle_dahdi_exception(e1i_ts);
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else if (ret < 0)
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LOGPITS(e1i_ts, DLMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret);
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}
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static int handle_hdlc_read(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI HDLC Rx");
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int ret;
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if (!msg)
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return -ENOMEM;
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ret = read(bfd->fd, msg->data, TS1_ALLOC_SIZE - 16);
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if (ret == -1)
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handle_dahdi_exception(e1i_ts);
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else if (ret < 0) {
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LOGPITS(e1i_ts, DLMI, LOGL_ERROR, "%s read failed %d (%s)\n", __func__, ret, strerror(errno));
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return ret;
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}
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msgb_put(msg, ret - 2);
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if (ret <= 3) {
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LOGPITS(e1i_ts, DLMI, LOGL_ERROR, "%s read failed %d (%s)\n", __func__, ret, strerror(errno));
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return ret;
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}
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return e1inp_rx_ts(e1i_ts, msg, 0, 0);
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}
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static int invertbits = 1;
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/* write to a B channel TS */
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static int handle_tsX_write(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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uint8_t tx_buf[D_BCHAN_TX_GRAN];
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struct subch_mux *mx = &e1i_ts->trau.mux;
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int ret;
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ret = subchan_mux_out(mx, tx_buf, D_BCHAN_TX_GRAN);
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if (ret != D_BCHAN_TX_GRAN) {
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "Huh, got ret of %d\n", ret);
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if (ret < 0)
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return ret;
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}
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LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "BCHAN TX: %s\n", osmo_hexdump(tx_buf, D_BCHAN_TX_GRAN));
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if (invertbits)
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osmo_revbytebits_buf(tx_buf, ret);
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ret = write(bfd->fd, tx_buf, ret);
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if (ret < D_BCHAN_TX_GRAN)
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "send returns %d instead of %d\n",
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ret, D_BCHAN_TX_GRAN);
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return ret;
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}
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#define D_TSX_ALLOC_SIZE (D_BCHAN_TX_GRAN)
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/* FIXME: read from a B channel TS */
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static int handle_tsX_read(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI TSx");
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int ret;
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if (!msg)
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return -ENOMEM;
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ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE);
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if (ret < 0 || ret != D_TSX_ALLOC_SIZE) {
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "read error %d %s\n", ret, strerror(errno));
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return ret;
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}
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if (invertbits)
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osmo_revbytebits_buf(msg->data, ret);
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msgb_put(msg, ret);
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msg->l2h = msg->data;
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LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "BCHAN RX: %s\n", osmo_hexdump(msgb_l2(msg), ret));
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ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
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/* physical layer indicates that data has been sent,
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* we thus can send some more data */
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ret = handle_tsX_write(bfd);
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return ret;
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}
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/* write to a raw channel TS */
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static int handle_ts_raw_write(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg;
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int ret;
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/* get the next msg for this timeslot */
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msg = e1inp_tx_ts(e1i_ts, NULL);
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if (!msg)
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return 0;
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if (msg->len != D_BCHAN_TX_GRAN) {
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/* This might lead to a transmit underrun, as we call tx
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* from the rx path, as there's no select/poll on dahdi
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* */
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LOGPITS(e1i_ts, DLINP, LOGL_NOTICE, "unexpected msg->len = %u, "
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"expected %u\n", msg->len, D_BCHAN_TX_GRAN);
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}
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LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN TX: %s\n", osmo_hexdump(msg->data, msg->len));
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if (0/*invertbits*/)
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osmo_revbytebits_buf(msg->data, msg->len);
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ret = write(bfd->fd, msg->data, msg->len);
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if (ret < msg->len)
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "send returns %d instead of %d\n", ret, msg->len);
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msgb_free(msg);
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return ret;
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}
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static int handle_ts_raw_read(struct osmo_fd *bfd)
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{
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struct e1inp_line *line = bfd->data;
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unsigned int ts_nr = bfd->priv_nr;
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struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
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struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI Raw TS");
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int ret;
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if (!msg)
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return -ENOMEM;
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ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE);
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if (ret < 0 || ret != D_TSX_ALLOC_SIZE) {
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LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "read error %d %s\n", ret, strerror(errno));
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return ret;
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}
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if (0/*invertbits*/)
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osmo_revbytebits_buf(msg->data, ret);
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msgb_put(msg, ret);
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msg->l2h = msg->data;
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LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN RX: %s\n", osmo_hexdump(msgb_l2(msg), ret));
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ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
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/* physical layer indicates that data has been sent,
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* we thus can send some more data */
|
|
ret = handle_ts_raw_write(bfd);
|
|
|
|
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 & OSMO_FD_EXCEPT)
|
|
handle_dahdi_exception(e1i_ts);
|
|
if (what & OSMO_FD_READ)
|
|
rc = handle_ts1_read(bfd);
|
|
if (what & OSMO_FD_WRITE)
|
|
rc = handle_ts1_write(bfd);
|
|
break;
|
|
case E1INP_TS_TYPE_HDLC:
|
|
if (what & OSMO_FD_EXCEPT)
|
|
handle_dahdi_exception(e1i_ts);
|
|
if (what & OSMO_FD_READ)
|
|
rc = handle_hdlc_read(bfd);
|
|
if (what & OSMO_FD_WRITE)
|
|
handle_hdlc_write(bfd);
|
|
break;
|
|
case E1INP_TS_TYPE_TRAU:
|
|
if (what & OSMO_FD_EXCEPT)
|
|
handle_dahdi_exception(e1i_ts);
|
|
if (what & OSMO_FD_READ)
|
|
rc = handle_tsX_read(bfd);
|
|
if (what & OSMO_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;
|
|
case E1INP_TS_TYPE_RAW:
|
|
if (what & OSMO_FD_EXCEPT)
|
|
handle_dahdi_exception(e1i_ts);
|
|
if (what & OSMO_FD_READ)
|
|
rc = handle_ts_raw_read(bfd);
|
|
if (what & OSMO_FD_WRITE)
|
|
rc = handle_ts_raw_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:
|
|
LOGPITS(e1i_ts, DLINP, LOGL_NOTICE, "unknown E1 TS type %u\n", e1i_ts->type);
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void dahdi_vty_show(struct vty *vty, struct e1inp_line *line)
|
|
{
|
|
struct span_cfg *scfg;
|
|
|
|
if (line->port_nr >= ARRAY_SIZE(span_cfgs))
|
|
return;
|
|
|
|
scfg = span_cfgs[line->port_nr];
|
|
if (!scfg) {
|
|
vty_out(vty, "DAHDI Span %u non-existent%s",
|
|
line->port_nr+1, VTY_NEWLINE);
|
|
return;
|
|
}
|
|
|
|
vty_out(vty, "DAHDI Span #%u, Base Nr %u, Timeslots: %u%s",
|
|
line->port_nr+1, scfg->chan_base, scfg->chan_num,
|
|
VTY_NEWLINE);
|
|
}
|
|
|
|
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,
|
|
.vty_show = &dahdi_vty_show,
|
|
};
|
|
|
|
int dahdi_set_bufinfo(int fd, int as_sigchan)
|
|
{
|
|
struct dahdi_bufferinfo bi;
|
|
int x = 0;
|
|
|
|
if (ioctl(fd, DAHDI_GET_BUFINFO, &bi)) {
|
|
LOGP(DLINP, LOGL_ERROR, "Error getting bufinfo\n");
|
|
return -EIO;
|
|
}
|
|
|
|
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)) {
|
|
LOGP(DLINP, LOGL_ERROR, "Error setting bufinfo\n");
|
|
return -EIO;
|
|
}
|
|
|
|
if (!as_sigchan) {
|
|
if (ioctl(fd, DAHDI_AUDIOMODE, &x)) {
|
|
LOGP(DLINP, LOGL_ERROR, "Error setting bufinfo\n");
|
|
return -EIO;
|
|
}
|
|
} 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 :( */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dahdi_open_slot(int dahdi_chan_nr)
|
|
{
|
|
int rc, fd;
|
|
#ifndef DAHDI_SPECIFY
|
|
char openstr[128];
|
|
snprintf(openstr, sizeof(openstr), "/dev/dahdi/%d", dev_nr);
|
|
#else
|
|
const char *openstr = "/dev/dahdi/channel";
|
|
#endif
|
|
rc = open(openstr, O_RDWR | O_NONBLOCK);
|
|
if (rc < 0) {
|
|
LOGP(DLINP, LOGL_ERROR, "DAHDI: could not open %s %s\n", openstr, strerror(errno));
|
|
return -EIO;
|
|
}
|
|
fd = rc;
|
|
#ifdef DAHDI_SPECIFY
|
|
rc = ioctl(fd, DAHDI_SPECIFY, &dahdi_chan_nr);
|
|
if (rc < 0) {
|
|
close(fd);
|
|
LOGP(DLINP, LOGL_ERROR, "DAHDI: could not DAHDI_SPECIFY %d: %s\n",
|
|
dahdi_chan_nr, strerror(errno));
|
|
return -EIO;
|
|
}
|
|
#endif
|
|
return fd;
|
|
}
|
|
|
|
static int dahdi_e1_setup(struct e1inp_line *line)
|
|
{
|
|
struct span_cfg *scfg;
|
|
int ts, ret;
|
|
|
|
reread_span_cfgs();
|
|
|
|
scfg = span_cfgs[line->port_nr];
|
|
if (!scfg) {
|
|
LOGPIL(line, DLMI, LOGL_ERROR, "Line %u(%s): DAHDI Port %u (Span %u) doesn't exist\n",
|
|
line->num, line->name, line->port_nr, line->port_nr+1);
|
|
return -EIO;
|
|
}
|
|
|
|
line->num_ts = scfg->chan_num;
|
|
|
|
/* TS0 is CRC4, don't need any fd for it */
|
|
for (ts = 1; ts <= scfg->chan_num; ts++) {
|
|
unsigned int idx = ts-1;
|
|
struct e1inp_ts *e1i_ts = &line->ts[idx];
|
|
struct osmo_fd *bfd = &e1i_ts->driver.dahdi.fd;
|
|
int dev_nr;
|
|
|
|
/* unregister FD if it was already registered */
|
|
if (bfd->list.next && bfd->list.next != LLIST_POISON1)
|
|
osmo_fd_unregister(bfd);
|
|
|
|
/* DAHDI device names/numbers just keep incrementing
|
|
* even over multiple boards. So TS1 of the second
|
|
* board will be 32 */
|
|
dev_nr = scfg->chan_base + idx;
|
|
|
|
bfd->data = line;
|
|
bfd->priv_nr = ts;
|
|
bfd->cb = dahdi_fd_cb;
|
|
|
|
switch (e1i_ts->type) {
|
|
case E1INP_TS_TYPE_NONE:
|
|
/* close/release LAPD instance, if any */
|
|
if (e1i_ts->lapd) {
|
|
lapd_instance_free(e1i_ts->lapd);
|
|
e1i_ts->lapd = NULL;
|
|
}
|
|
if (bfd->fd) {
|
|
close(bfd->fd);
|
|
bfd->fd = 0;
|
|
}
|
|
continue;
|
|
break;
|
|
case E1INP_TS_TYPE_SIGN:
|
|
if (!bfd->fd)
|
|
bfd->fd = dahdi_open_slot(dev_nr);
|
|
if (bfd->fd < 0)
|
|
return -EIO;
|
|
bfd->when = OSMO_FD_READ | OSMO_FD_EXCEPT;
|
|
ret = dahdi_set_bufinfo(bfd->fd, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!e1i_ts->lapd) {
|
|
char name[32];
|
|
e1inp_ts_name(name, sizeof(name), e1i_ts);
|
|
e1i_ts->lapd = lapd_instance_alloc2(1,
|
|
dahdi_write_msg, bfd, e1inp_dlsap_up,
|
|
e1i_ts, &lapd_profile_abis, name);
|
|
}
|
|
break;
|
|
case E1INP_TS_TYPE_HDLC:
|
|
if (!bfd->fd)
|
|
bfd->fd = dahdi_open_slot(dev_nr);
|
|
if (bfd->fd < 0)
|
|
return -EIO;
|
|
bfd->when = OSMO_FD_READ | OSMO_FD_EXCEPT;
|
|
ret = dahdi_set_bufinfo(bfd->fd, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
break;
|
|
case E1INP_TS_TYPE_TRAU:
|
|
case E1INP_TS_TYPE_RAW:
|
|
/* close/release LAPD instance, if any */
|
|
if (e1i_ts->lapd) {
|
|
lapd_instance_free(e1i_ts->lapd);
|
|
e1i_ts->lapd = NULL;
|
|
}
|
|
if (!bfd->fd)
|
|
bfd->fd = dahdi_open_slot(dev_nr);
|
|
if (bfd->fd < 0)
|
|
return -EIO;
|
|
ret = dahdi_set_bufinfo(bfd->fd, 0);
|
|
if (ret < 0)
|
|
return -EIO;
|
|
/* We never include the DAHDI B-Channel FD into the
|
|
* writeset, since it doesn't support poll() based
|
|
* write flow control */
|
|
bfd->when = OSMO_FD_READ | OSMO_FD_EXCEPT;// | OSMO_FD_WRITE;
|
|
break;
|
|
}
|
|
|
|
if (bfd->fd < 0)
|
|
return bfd->fd;
|
|
|
|
ret = osmo_fd_register(bfd);
|
|
if (ret < 0) {
|
|
LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "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)
|
|
{
|
|
/* register the driver with the core */
|
|
return e1inp_driver_register(&dahdi_driver);
|
|
}
|