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/* GPRS Subscriber Update Protocol client */
/* (C) 2014 by Sysmocom s.f.m.c. GmbH
* All Rights Reserved
*
* Author: Jacob Erlbeck
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <osmocom/core/timer.h>
#include <osmocom/gsm/oap_client.h>
#include <osmocom/gsm/ipa.h>
#include <osmocom/gsm/gsup.h>
/* a loss of GSUP between MSC and HLR is considered quite serious, let's try to recover as quickly as
* possible. Even one new connection attempt per second should be quite acceptable until the link is
* re-established */
#define OSMO_GSUP_CLIENT_RECONNECT_INTERVAL 1
#define OSMO_GSUP_CLIENT_PING_INTERVAL 20
struct msgb;
struct ipa_client_conn;
struct osmo_gsup_client;
/* Expects message in msg->l2h */
typedef int (*osmo_gsup_client_read_cb_t)(struct osmo_gsup_client *gsupc, struct msgb *msg);
typedef bool (*osmo_gsup_client_up_down_cb_t)(struct osmo_gsup_client *gsupc, bool up);
struct osmo_gsup_client {
const char *unit_name; /* same as ipa_dev->unit_name, for backwards compat */
struct ipa_client_conn *link;
osmo_gsup_client_read_cb_t read_cb;
void *data;
struct osmo_oap_client_state oap_state;
struct osmo_timer_list ping_timer;
struct osmo_timer_list connect_timer;
int is_connected;
int got_ipa_pong;
struct ipaccess_unit *ipa_dev; /* identification information sent to IPA server */
osmo_gsup_client_up_down_cb_t up_down_cb;
};
struct osmo_gsup_client_config {
/*! IP access unit which contains client identification information; must be allocated in talloc_ctx as well to
* ensure it lives throughout the lifetime of the connection. */
struct ipaccess_unit *ipa_dev;
/*! GSUP server IP address to connect to. */
const char *ip_addr;
/*! GSUP server TCP port to connect to. */
unsigned int tcp_port;
/*! OPA client configuration, or NULL. */
struct osmo_oap_client_config *oapc_config;
/*! callback for reading from the GSUP connection. */
osmo_gsup_client_read_cb_t read_cb;
/*! Invoked when the GSUP link is ready for communication, and when the link drops. */
osmo_gsup_client_up_down_cb_t up_down_cb;
/*! User data stored in the returned gsupc->data, as context for the callbacks. */
void *data;
/*! Marker for future extension, always pass this as false. */
bool more;
};
struct osmo_gsup_client *osmo_gsup_client_create3(void *talloc_ctx, struct osmo_gsup_client_config *config);
struct osmo_gsup_client *osmo_gsup_client_create2(void *talloc_ctx,
struct ipaccess_unit *ipa_dev,
const char *ip_addr,
unsigned int tcp_port,
osmo_gsup_client_read_cb_t read_cb,
struct osmo_oap_client_config *oapc_config);
struct osmo_gsup_client *osmo_gsup_client_create(void *talloc_ctx,
const char *unit_name,
const char *ip_addr,
unsigned int tcp_port,
osmo_gsup_client_read_cb_t read_cb,
struct osmo_oap_client_config *oapc_config);
void osmo_gsup_client_destroy(struct osmo_gsup_client *gsupc);
int osmo_gsup_client_send(struct osmo_gsup_client *gsupc, struct msgb *msg);
int osmo_gsup_client_enc_send(struct osmo_gsup_client *gsupc,
const struct osmo_gsup_message *gsup_msg);
struct msgb *osmo_gsup_client_msgb_alloc(void);
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