diff options
author | Pablo Neira Ayuso <pablo@gnumonks.org> | 2011-08-17 22:44:07 +0200 |
---|---|---|
committer | Harald Welte <laforge@gnumonks.org> | 2011-08-19 22:38:35 +0200 |
commit | ed5cacb240b846c106f0fc6a3ab8e8721f4c70a5 (patch) | |
tree | ba6bffbf0c95ecc0c50b5335bed77f3a2b29120f /openbsc/src/libabis/input/dahdi.c | |
parent | 7abecfcfc9ef94c1367cd88ac858b79d20f75db0 (diff) |
src: port openBSC over libosmo-abisopenbsc/0.9.15
This is a big patch that ports openBSC over libosmo-abis.
Sorry, the changes that are included here are all dependent
of libosmo-abis, splitting them into smaller pieces would
leave the repository in some intermediate state, which is
not desired.
The main changes are:
- The directory libabis/ has been removed as it now lives in
libosmo-abis.
- new configuration file format for nanoBTS and HSL femto, we
need to define the virtual e1_line and attach it to the OML
link.
- all the existing BTS drivers (nanoBTS, hsl femto, Nokia site,
BS11 and rbs2000) now use the new libosmo-abis framework.
- use r232 input driver available in libosmo-abis for bs11_config.
- use ipa_msg_recv instead of old ipaccess_read_msg function.
- delete definition of gsm_e1_subslot and input_signal_data.
These structures now lives in libosmo-abis.
Most of this patch are deletions of libabis/ which has been
moved to libosmo-abis.
This patch also modifies openBSC to use all the new definitions
available in libosmocore and libosmo-abis. In order to do that,
we have replaced the following:
- DINP, DMI, DMIB and DMUX by their respective DL* correspondences.
- SS_GLOBAL by SS_L_GLOBAL
- SS_INPUT by SS_L_INPUT
- S_GLOBAL_SHUTDOWN by S_L_GLOBAL_SHUTDOWN
- SS_INPUT by SS_L_INPUT
- S_INP_* by S_L_INP_* sub-signals
- E1INP_NODE by L_E1INP_NODE vty node
This patch has been tested with:
- one nanoBTS
- the HSL femto with the examples available under libosmo-abis
- BS11 with both dahdi and misdn drivers.
Diffstat (limited to 'openbsc/src/libabis/input/dahdi.c')
-rw-r--r-- | openbsc/src/libabis/input/dahdi.c | 527 |
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 6802a1e85..000000000 --- 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 */ |