coord_pair.h

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#pragma once
/*
 *  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, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
/**
 * $Id: 8362d4872ac0ccf1b6a70ac38c97372da1a7f164 $
 *
 * @file io/coord_pair.h
 * @brief Sending pair lists to and from coordination threads
 *
 * @copyright 2026 Network RADIUS SAS (legal@networkradius.com)
 */
RCSIDH(coord_pair_h, "$Id: 8362d4872ac0ccf1b6a70ac38c97372da1a7f164 $")
 
#include <freeradius-devel/io/coord.h>
#include <freeradius-devel/server/request.h>
#include <freeradius-devel/util/pair.h>
 
typedef struct fr_coord_pair_reg_s fr_coord_pair_reg_t;
typedef struct fr_coord_pair_s fr_coord_pair_t;
 
typedef void (*fr_coord_worker_pair_cb_t)(fr_coord_worker_t *cw, fr_coord_pair_reg_t *coord_pair_reg, fr_pair_list_t const *list, fr_time_t now, void *uctx);
 
typedef struct {
        uint32_t                        packet_type;            //!< Packet type value for this callback
        fr_coord_worker_pair_cb_t       callback;               //!< Function to call
        void                            *uctx;                  //!< Ctx to pass to callback
} fr_coord_worker_pair_cb_reg_t;
 
typedef struct {
        fr_coord_worker_pair_cb_reg_t   *worker_cb;             //!< Callbacks for coordinator -> worker pair messages.
        fr_dict_attr_t const            *root;                  //!< Root attribute for decoding pair list messages.
        uint32_t                        cb_id;                  //!< Coordinator callback id used for pair list messages.
        CONF_SECTION                    *cs;                    //!< Module conf section.
        fr_time_delta_t                 max_request_time;       //!< Maximum time for coordinator request processing.
                                                                ///< Defaults to main config max request time.
} fr_coord_pair_reg_ctx_t;
 
fr_coord_pair_reg_t     *fr_coord_pair_register(TALLOC_CTX *ctx, fr_coord_pair_reg_ctx_t *reg_ctx);
 
int             fr_coord_to_worker_reply_send(request_t *request, uint32_t worker_id);
 
int             fr_worker_to_coord_pair_send(fr_coord_worker_t *cw, fr_coord_pair_reg_t *coord_pair_reg, fr_pair_list_t *list);
 
/*
 *      Callbacks used to register coord_pair handling in a coordinator.
 */
fr_coord_cb_inst_t      *fr_coord_pair_inst_create(TALLOC_CTX *ctx, fr_coord_t *coord, fr_event_list_t *el,
                                                     bool single_thread, void *uctx);
void                    fr_coord_pair_data_recv(fr_coord_t *coord, uint32_t worker_id, fr_dbuff_t *dbuff, fr_time_t now,
                                                void *parent, void *uctx);
void                    fr_coord_worker_pair_data_recv(fr_coord_worker_t *cw, fr_dbuff_t *dbuff, fr_time_t now, void *uctx);
 
uint32_t                fr_coord_pair_reg_cb_id(fr_coord_pair_reg_t *coord_pair_reg);
 
/** Set callback for handling worker -> coordinator pair list data
 * @param _id   Callback ID to use
 */
#define FR_COORD_PAIR_CALLBACK(_id)     [_id] = { .callback = fr_coord_pair_data_recv, .inst_create = fr_coord_pair_inst_create }
 
/** Set callback for handling coordinator -> worker pair list data
 * @param _id   Callback ID to use
 */
#define FR_COORD_WORKER_PAIR_CALLBACK(_id)      [_id] = { .callback = fr_coord_worker_pair_data_recv }
 
/** Set up ctx on pair list callbacks
 * @param _in_cb        Array of worker -> coordinator callbacks.
 * @param _out_cb       Array of coordinator -> worker callbacks.
 * @param _reg          Registered coordinator pair list callback data.
 */
#define FR_COORD_PAIR_CB_CTX_SET(_in_cb, _out_cb, _reg) \
        do { \
                _in_cb[fr_coord_pair_reg_cb_id(_reg)].uctx = _reg; \
                _out_cb[fr_coord_pair_reg_cb_id(_reg)].uctx = _reg; \
        } while (0)