542 lines
14 KiB
C
542 lines
14 KiB
C
/* 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/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 <osmocom/core/select.h>
|
|
#include <osmocom/core/msgb.h>
|
|
#include <osmocom/core/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;
|
|
uint8_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;
|
|
osmo_timer_schedule(&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;
|
|
uint8_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);
|
|
}
|