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/* Copyright 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
*
* 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/>.
*
*/
#pragma once
#include <stdbool.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/sockaddr_str.h>
struct osmo_gsup_client;
struct osmo_gsup_message;
struct osmo_gsup_req;
struct msgb;
#define LOG_REMOTE_HLR(remote_hlr, level, fmt, args...) \
LOGP(DDGSM, level, "(Proxy HLR-" OSMO_SOCKADDR_STR_FMT ") " fmt, \
OSMO_SOCKADDR_STR_FMT_ARGS((remote_hlr) ? &(remote_hlr)->addr : NULL), ##args)
#define LOG_REMOTE_HLR_MSG(remote_hlr, gsup_msg, level, fmt, args...) \
LOG_REMOTE_HLR(remote_hlr, level, "%s: " fmt, osmo_gsup_message_type_name((gsup_msg)->message_type), ##args)
/* GSUP client link for proxying to a remote HLR. */
struct remote_hlr {
struct llist_head entry;
struct osmo_sockaddr_str addr;
struct osmo_gsup_client *gsupc;
struct llist_head pending_up_callbacks;
};
/*! Receive a remote_hlr address when connecting succeeded, or remote_hlr == NULL on error.
* \param addr GSUP IP address and port for which the connection was requested.
* \param remote_hlr The connected remote_hlr ready for sending, or NULL if connecting failed.
* \param data Same a passed to remote_hlr_get_or_connect(). */
typedef void (*remote_hlr_connect_result_cb_t)(const struct osmo_sockaddr_str *addr, struct remote_hlr *remote_hlr, void *data);
struct remote_hlr *remote_hlr_get_or_connect(const struct osmo_sockaddr_str *addr, bool connect,
remote_hlr_connect_result_cb_t connect_result_cb, void *data);
void remote_hlr_destroy(struct remote_hlr *remote_hlr);
int remote_hlr_msgb_send(struct remote_hlr *remote_hlr, struct msgb *msg);
void remote_hlr_gsup_forward_to_remote_hlr(struct remote_hlr *remote_hlr, struct osmo_gsup_req *req,
struct osmo_gsup_message *modified_gsup);
bool remote_hlr_is_up(struct remote_hlr *remote_hlr);
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