195 lines
4.2 KiB
C
195 lines
4.2 KiB
C
/*
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* e1d.h
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*
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* (C) 2019 by Sylvain Munaut <tnt@246tNt.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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#include <stdint.h>
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#include <osmocom/core/isdnhdlc.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/vty/command.h>
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enum e1d_vty_node {
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E1D_NODE = _LAST_OSMOVTY_NODE + 1,
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LINE_NODE
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};
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#define line_ctr_add(line, idx, add) rate_ctr_add(&(line)->ctrs->ctr[idx], add)
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enum e1d_line_ctr {
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LINE_CTR_LOS,
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LINE_CTR_LOA,
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LINE_CTR_CRC_ERR,
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LINE_CTR_RX_OVFL,
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LINE_CTR_TX_UNFL,
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LINE_CTR_RX_REMOTE_E,
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LINE_CTR_RX_REMOTE_A,
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};
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enum e1_ts_mode {
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E1_TS_MODE_OFF = 0,
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E1_TS_MODE_RAW,
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E1_TS_MODE_HDLCFCS,
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};
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extern const struct value_string e1_ts_mode_names[];
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struct e1_ts {
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struct e1_line *line;
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uint8_t id;
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/* Mode */
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enum e1_ts_mode mode;
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/* HDLC handling */
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struct {
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struct osmo_isdnhdlc_vars tx;
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struct osmo_isdnhdlc_vars rx;
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uint8_t rx_buf[264];
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uint8_t tx_buf[264];
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int tx_ofs;
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int tx_len;
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} hdlc;
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/* RAW handling */
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struct {
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uint8_t *rx_buf; /* actual buffer storage */
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unsigned int rx_buf_size; /* size of 'buf' in bytes */
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unsigned int rx_buf_used; /* number of bytes used so far */
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} raw;
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/* Remote end */
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int fd;
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};
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enum e1_line_mode {
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/* 31 individual 64k timeslots, as used on 3GPP Abis, 3GPP A or ISDN */
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E1_LINE_MODE_CHANNELIZED,
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/* 1 channel group spanning all 31 TS, as used e.g. when using Frame Relay
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* or raw HDLC over channelized E1. */
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E1_LINE_MODE_SUPERCHANNEL,
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};
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#define E1L_TS0_RX_CRC4_ERR 0x01
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#define E1L_TS0_RX_ALARM 0x02
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struct e1_line {
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struct llist_head list;
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struct e1_intf *intf;
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uint8_t id;
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enum e1_line_mode mode;
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void *drv_data;
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struct rate_ctr_group *ctrs;
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/* timeslots for channelized mode */
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struct e1_ts ts[32];
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/* superchannel */
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struct e1_ts superchan;
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struct {
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/*! buffer where we aggregate the E bits each multi-frame */
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uint8_t e_bits;
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/*! did we receive CRC4 / ALARM error reports this second (timer tick) */
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uint8_t cur_errmask;
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/*! did we receive CRC4 / ALARM error reports previous second (timer tick) */
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uint8_t prev_errmask;
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/*! timer to re-set the rx_crc4_err and rx_alarm above */
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struct osmo_timer_list timer;
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} ts0;
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void *e1gen_priv;
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};
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enum e1_driver {
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E1_DRIVER_USB,
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E1_DRIVER_VPAIR,
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};
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extern const struct value_string e1_driver_names[];
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extern const struct value_string e1_line_mode_names[];
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struct e1_intf {
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struct llist_head list;
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struct e1_daemon *e1d;
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uint8_t id;
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enum e1_driver drv;
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void *drv_data;
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struct llist_head lines;
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};
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struct e1_daemon {
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void *ctx;
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struct llist_head interfaces;
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};
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struct e1_line *
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e1_intf_find_line(struct e1_intf *intf, uint8_t id);
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struct e1_line *
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e1_intf_find_line(struct e1_intf *intf, uint8_t id);
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struct e1_intf *
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e1_intf_new(struct e1_daemon *e1d, void *drv_data);
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struct e1_intf *
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e1d_find_intf(struct e1_daemon *e1d, uint8_t id);
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void
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e1_intf_destroy(struct e1_intf *intf);
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struct e1_line *
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e1_intf_find_line(struct e1_intf *intf, uint8_t id);
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struct e1_line *
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e1_line_new(struct e1_intf *intf, void *drv_data);
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void
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e1_line_destroy(struct e1_line *line);
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int
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e1_line_mux_out(struct e1_line *line, uint8_t *buf, int fts);
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int
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e1_line_demux_in(struct e1_line *line, const uint8_t *buf, int size, int frame_base);
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void
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e1_ts_stop(struct e1_ts *ts);
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void
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e1d_vty_init(struct e1_daemon *e1d);
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int
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e1d_vpair_create(struct e1_daemon *e1d, unsigned int num_lines);
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struct e1_intf *
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e1d_vpair_intf_peer(struct e1_intf *intf);
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