/*
 * Ouroboros - Copyright (C) 2016 - 2026
 *
 * The IPC Resource Manager - Registry - Flows
 *
 *    Dimitri Staessens <dimitri@ouroboros.rocks>
 *    Sander Vrijders   <sander@ouroboros.rocks>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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., http://www.fsf.org/about/contact/.
 */

#ifndef OUROBOROS_IRMD_REG_FLOW_H
#define OUROBOROS_IRMD_REG_FLOW_H

#include <ouroboros/list.h>
#include <ouroboros/flow.h>
#include <ouroboros/name.h>
#include <ouroboros/pthread.h>
#include <ouroboros/qos.h>
#include <ouroboros/ssm_rbuff.h>
#include <ouroboros/utils.h>

#include <stdbool.h>
#include <sys/types.h>
#include <time.h>

struct reg_flow {
        struct list_head   next;

        struct flow_info   info;
        int                response;

        buffer_t           req_data;
        buffer_t           rsp_data;
        struct timespec    t0;

        char               name[NAME_SIZE + 1];

        bool               direct;

        /* Tier-2 re-key state (encrypted flows only) */
        struct {
                bool    encrypted;     /* flow carries a cipher       */
                uint8_t epoch;         /* last epoch installed by app */
                bool    initiator;     /* OAP initiator (role 0)      */
                bool    in_flight;     /* a re-key is in progress     */
                bool    req_queued;    /* a peer REQ is in the inbox  */
                bool    resp_queued;   /* a peer RESP is in the inbox */
                uint8_t * pending_seed;    /* secure heap; NULL until set */
                uint8_t pending_epoch;
                bool    pending_initiator; /* pending seed: oap_cli side */
                bool    has_pending;   /* new seed awaits app pull    */
                uint8_t pulled;        /* direct: per-app pull mask   */
                buffer_t peer_crt;     /* peer cert DER, cached at HS  */
        } rk;

        struct ssm_rbuff * n_rb;
        struct ssm_rbuff * n_1_rb;
};

struct reg_flow * reg_flow_create(const struct flow_info * info);

void              reg_flow_destroy(struct reg_flow * flow);

int               reg_flow_update(struct reg_flow *  flow,
                                  struct flow_info * info);

#endif /* OUROBOROS_IRMD_REG_FLOW_H */
