Add dahdi.c
This commit is contained in:
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f933de97ba
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@ -0,0 +1,500 @@
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/* OpenBSC Abis input driver for mISDNuser */
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/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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*
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* All Rights Reserved
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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 <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/types.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 <mISDNif.h>
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//#define AF_COMPATIBILITY_FUNC
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//#include <compat_af_isdn.h>
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#ifndef AF_ISDN
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#define AF_ISDN 34
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#define PF_ISDN AF_ISDN
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#endif
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#include <openbsc/select.h>
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#include <openbsc/msgb.h>
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#include <openbsc/debug.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/abis_nm.h>
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#include <openbsc/abis_rsl.h>
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#include <openbsc/subchan_demux.h>
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#include <openbsc/e1_input.h>
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#include <openbsc/talloc.h>
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#define TS1_ALLOC_SIZE 300
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struct prim_name {
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unsigned int prim;
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const char *name;
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};
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const struct prim_name prim_names[] = {
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{ PH_CONTROL_IND, "PH_CONTROL_IND" },
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{ PH_DATA_IND, "PH_DATA_IND" },
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{ PH_DATA_CNF, "PH_DATA_CNF" },
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{ PH_ACTIVATE_IND, "PH_ACTIVATE_IND" },
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{ DL_ESTABLISH_IND, "DL_ESTABLISH_IND" },
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{ DL_ESTABLISH_CNF, "DL_ESTABLISH_CNF" },
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{ DL_RELEASE_IND, "DL_RELEASE_IND" },
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{ DL_RELEASE_CNF, "DL_RELEASE_CNF" },
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{ DL_DATA_IND, "DL_DATA_IND" },
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{ DL_UNITDATA_IND, "DL_UNITDATA_IND" },
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{ DL_INFORMATION_IND, "DL_INFORMATION_IND" },
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{ MPH_ACTIVATE_IND, "MPH_ACTIVATE_IND" },
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{ MPH_DEACTIVATE_IND, "MPH_DEACTIVATE_IND" },
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};
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const char *get_prim_name(unsigned int prim)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(prim_names); i++) {
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if (prim_names[i].prim == prim)
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return prim_names[i].name;
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}
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return "UNKNOWN";
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}
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static int handle_ts1_read(struct bsc_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 *link;
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struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "mISDN TS1");
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struct sockaddr_mISDN l2addr;
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struct mISDNhead *hh;
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socklen_t alen;
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int ret;
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if (!msg)
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return -ENOMEM;
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hh = (struct mISDNhead *) msg->data;
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alen = sizeof(l2addr);
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ret = recvfrom(bfd->fd, msg->data, 300, 0,
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(struct sockaddr *) &l2addr, &alen);
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if (ret < 0) {
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fprintf(stderr, "recvfrom error %s\n", strerror(errno));
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return ret;
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}
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if (alen != sizeof(l2addr)) {
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fprintf(stderr, "%s error len\n", __func__);
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return -EINVAL;
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}
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msgb_put(msg, ret);
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DEBUGP(DMI, "alen =%d, dev(%d) channel(%d) sapi(%d) tei(%d)\n",
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alen, l2addr.dev, l2addr.channel, l2addr.sapi, l2addr.tei);
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DEBUGP(DMI, "<= len = %d, prim(0x%x) id(0x%x): %s\n",
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ret, hh->prim, hh->id, get_prim_name(hh->prim));
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switch (hh->prim) {
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case DL_INFORMATION_IND:
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/* mISDN tells us which channel number is allocated for this
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* tuple of (SAPI, TEI). */
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DEBUGP(DMI, "DL_INFORMATION_IND: use channel(%d) sapi(%d) tei(%d) for now\n",
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l2addr.channel, l2addr.sapi, l2addr.tei);
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link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi);
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if (!link) {
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DEBUGPC(DMI, "mISDN message for unknown sign_link\n");
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msgb_free(msg);
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return -EINVAL;
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}
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/* save the channel number in the driver private struct */
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link->driver.misdn.channel = l2addr.channel;
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break;
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case DL_ESTABLISH_IND:
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DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n",
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l2addr.channel, l2addr.sapi, l2addr.tei);
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ret = e1inp_event(e1i_ts, EVT_E1_TEI_UP, l2addr.tei, l2addr.sapi);
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break;
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case DL_RELEASE_IND:
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DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n",
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l2addr.channel, l2addr.sapi, l2addr.tei);
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ret = e1inp_event(e1i_ts, EVT_E1_TEI_DN, l2addr.tei, l2addr.sapi);
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break;
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case DL_DATA_IND:
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case DL_UNITDATA_IND:
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msg->l2h = msg->data + MISDN_HEADER_LEN;
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DEBUGP(DMI, "RX: %s\n", hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
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ret = e1inp_rx_ts(e1i_ts, msg, l2addr.tei, l2addr.sapi);
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break;
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case PH_ACTIVATE_IND:
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DEBUGP(DMI, "PH_ACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
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l2addr.channel, l2addr.sapi, l2addr.tei);
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break;
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case PH_DEACTIVATE_IND:
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DEBUGP(DMI, "PH_DEACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
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l2addr.channel, l2addr.sapi, l2addr.tei);
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break;
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default:
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break;
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}
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return ret;
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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 mISDN 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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return 0;
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e1i_ts->driver.misdn.fd.when |= BSC_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 int handle_ts1_write(struct bsc_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 sockaddr_mISDN sa;
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struct msgb *msg;
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struct mISDNhead *hh;
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u_int8_t *l2_data;
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int ret;
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bfd->when &= ~BSC_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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l2_data = msg->data;
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/* prepend the mISDNhead */
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hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh));
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hh->prim = DL_DATA_REQ;
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DEBUGP(DMI, "TX TEI(%d) SAPI(%d): %s\n", sign_link->tei,
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sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN));
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/* construct the sockaddr */
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sa.family = AF_ISDN;
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sa.sapi = sign_link->sapi;
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sa.dev = sign_link->tei;
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sa.channel = sign_link->driver.misdn.channel;
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ret = sendto(bfd->fd, msg->data, msg->len, 0,
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(struct sockaddr *)&sa, sizeof(sa));
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if (ret < 0)
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fprintf(stderr, "%s sendto failed %d\n", __func__, ret);
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msgb_free(msg);
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/* set tx delay timer for next event */
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e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
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e1i_ts->sign.tx_timer.data = e1i_ts;
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bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 50000);
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return ret;
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}
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#define BCHAN_TX_GRAN 160
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/* write to a B channel TS */
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static int handle_tsX_write(struct bsc_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 mISDNhead *hh;
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u_int8_t tx_buf[BCHAN_TX_GRAN + sizeof(*hh)];
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struct subch_mux *mx = &e1i_ts->trau.mux;
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int ret;
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hh = (struct mISDNhead *) tx_buf;
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hh->prim = PH_DATA_REQ;
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subchan_mux_out(mx, tx_buf+sizeof(*hh), BCHAN_TX_GRAN);
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DEBUGP(DMIB, "BCHAN TX: %s\n",
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hexdump(tx_buf+sizeof(*hh), BCHAN_TX_GRAN));
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ret = send(bfd->fd, tx_buf, sizeof(*hh) + BCHAN_TX_GRAN, 0);
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if (ret < sizeof(*hh) + BCHAN_TX_GRAN)
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DEBUGP(DMIB, "send returns %d instead of %lu\n", ret,
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sizeof(*hh) + BCHAN_TX_GRAN);
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return ret;
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}
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#define TSX_ALLOC_SIZE 4096
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/* FIXME: read from a B channel TS */
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static int handle_tsX_read(struct bsc_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(TSX_ALLOC_SIZE, "DAHDI TSx");
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struct mISDNhead *hh;
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int ret;
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if (!msg)
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return -ENOMEM;
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hh = (struct mISDNhead *) msg->data;
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ret = read(bfd->fd, msg->data, TSX_ALLOC_SIZE, 0);
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if (ret < 0) {
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fprintf(stderr, "read error %s\n", 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 (hh->prim != PH_CONTROL_IND)
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DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n",
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ret, hh->prim, hh->id, get_prim_name(hh->prim));
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switch (hh->prim) {
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case PH_DATA_IND:
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msg->l2h = msg->data + MISDN_HEADER_LEN;
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DEBUGP(DMIB, "BCHAN RX: %s\n",
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hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
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ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
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break;
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case PH_ACTIVATE_IND:
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case PH_DATA_CNF:
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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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default:
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break;
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}
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/* FIXME: why do we free signalling msgs in the caller, and trau not? */
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msgb_free(msg);
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return ret;
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}
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/* callback from select.c in case one of the fd's can be read/written */
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static int dahdi_fd_cb(struct bsc_fd *bfd, unsigned int what)
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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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unsigned int idx = ts_nr-1;
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struct e1inp_ts *e1i_ts = &line->ts[idx];
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int rc = 0;
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switch (e1i_ts->type) {
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case E1INP_TS_TYPE_SIGN:
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if (what & BSC_FD_READ)
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rc = handle_ts1_read(bfd);
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if (what & BSC_FD_WRITE)
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rc = handle_ts1_write(bfd);
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break;
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case E1INP_TS_TYPE_TRAU:
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if (what & BSC_FD_READ)
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rc = handle_tsX_read(bfd);
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/* We never include the mISDN 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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break;
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default:
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fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type);
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break;
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}
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return rc;
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}
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#if 0
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static int activate_bchan(struct e1inp_line *line, int ts, int act)
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{
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struct mISDNhead hh;
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int ret;
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unsigned int idx = ts-1;
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struct e1inp_ts *e1i_ts = &line->ts[idx];
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struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
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fprintf(stdout, "activate bchan\n");
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if (act)
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hh.prim = PH_ACTIVATE_REQ;
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else
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hh.prim = PH_DEACTIVATE_REQ;
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hh.id = MISDN_ID_ANY;
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ret = sendto(bfd->fd, &hh, sizeof(hh), 0, NULL, 0);
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if (ret < 0) {
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fprintf(stdout, "could not send ACTIVATE_RQ %s\n",
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strerror(errno));
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}
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return ret;
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}
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#endif
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struct e1inp_driver dahdi_driver = {
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.name = "DAHDI",
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.want_write = ts_want_write,
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};
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static int mi_e1_setup(struct e1inp_line *line, int release_l2)
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{
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int ts, ret;
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/* TS0 is CRC4, don't need any fd for it */
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for (ts = 1; ts < NUM_E1_TS; ts++) {
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unsigned int idx = ts-1;
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char openstr[128];
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struct e1inp_ts *e1i_ts = &line->ts[idx];
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struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
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struct sockaddr_mISDN addr;
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bfd->data = line;
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bfd->priv_nr = ts;
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bfd->cb = dahdi_fd_cb;
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snprintf(openstr, sizeof(openstr), "/dev/dahdi/%d", ts);
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switch (e1i_ts->type) {
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case E1INP_TS_TYPE_NONE:
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continue;
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break;
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case E1INP_TS_TYPE_SIGN:
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bfd->fd = open(openstr, O_RDWR);
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bfd->when = BSC_FD_READ;
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break;
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case E1INP_TS_TYPE_TRAU:
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bfd->fd = open(openstr, O_RDWR);
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/* We never include the mISDN 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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bfd->when = BSC_FD_READ;
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break;
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}
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if (bfd->fd < 0) {
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fprintf(stderr, "%s could not open %s %s\n",
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__func__, openstr, strerror(errno));
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return bfd->fd;
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}
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ret = bsc_register_fd(bfd);
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if (ret < 0) {
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fprintf(stderr, "could not register FD: %s\n",
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strerror(ret));
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return ret;
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}
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}
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return 0;
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}
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int mi_e1_line_update(struct e1inp_line *line)
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{
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struct mISDN_devinfo devinfo;
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int sk, ret, cnt;
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if (!line->driver) {
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/* this must be the first update */
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line->driver = &misdn_driver;
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} else {
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||||
/* this is a subsequent update */
|
||||
/* FIXME: first close all sockets */
|
||||
fprintf(stderr, "incremental line updates not supported yet\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
static __attribute__((constructor)) void on_dso_load_sms(void)
|
||||
{
|
||||
/* register the driver with the core */
|
||||
e1inp_driver_register(&dahdi_driver);
|
||||
}
|
Loading…
Reference in New Issue