88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
#pragma once
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/* B-channel handler management. Handles registration of and routing to
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* various potentially registered B-channel handlers / routes
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*
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* (C) 2022 by Harald Welte <laforge@gnumonks.org>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <stdint.h>
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#include <osmocom/core/linuxlist.h>
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#include "capi_misc_defs.h"
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enum log_subsys {
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DLCAPI20,
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DCAPI,
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};
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extern void *g_ctx;
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struct capi_connection;
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struct bchan_handler_cfg {
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/* B1/B2/B3 protocol used in CAPI CONNECT_RESP */
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struct {
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uint16_t b1;
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uint16_t b2;
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uint16_t b3;
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} proto;
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const uint8_t *ncpi;
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uint32_t max_b_data_blocks;
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uint32_t max_b_data_len;
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};
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struct call_state;
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/* call-back functions (operations) for a B-channel handler */
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struct bchan_handler_ops {
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/* initialize whatever handler-private state (call setup) */
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int (*init)(struct call_state *cst);
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/* receive data (ISDN -> handler) */
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void (*rx_data)(struct call_state *cst, const uint8_t *data, size_t len);
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/* destroy whatever handler-private state (call teardown) */
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void (*fini)(struct call_state *cst);
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};
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/* The actual B-channel handler: list/name/config/ops */
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struct bchan_handler {
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struct llist_head list;
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/* name of this handler / application */
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const char *name;
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/* CAPI related configuration */
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struct bchan_handler_cfg cfg;
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struct bchan_handler_ops ops;
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/* handler private data */
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void *priv;
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};
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/* representation of one given call within a specific bchan-handler */
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struct call_state {
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/* back-pointer to handler */
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struct bchan_handler *bch;
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/* capiconn.h state */
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struct capi_connection *cc;
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/* per-call private state (return value of bchan_handler.init) */
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void *priv;
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};
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/* a route for routing incoming calls to a bchan-handler */
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struct bchan_route {
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/* global list of bchan_routes */
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struct llist_head list;
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int cip; /* -1: accept any CIP */
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const char *msn; /* NULL: accept any MSN / called number */
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struct bchan_handler *hdlr; /* handler for this CIP/MSN */
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};
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struct bchan_handler *bchan_handler_find(const char *name);
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void bchan_handler_register(struct bchan_handler *hdlr);
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void bchan_route_add(int cip, const char *msn, const char *hdlr_name);
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struct bchan_handler *bchan_handler_for_call(uint16_t cip, const char *msn);
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int bchan_call_tx(struct call_state *cst, const uint8_t *data, size_t len);
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