caller.c

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/*
 *   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: def5c58345e635918f0906f2ab238eab94c0065f $
 *
 * @file unlang/caller.c
 * @brief Unlang "caller" keyword evaluation.  Used for setting allowed parent protocols
 *
 * @copyright 2020 The FreeRADIUS server project
 * @copyright 2021 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
 */
RCSID("$Id: def5c58345e635918f0906f2ab238eab94c0065f $")
 
#include <freeradius-devel/server/state.h>
 
#include "caller_priv.h"
#include "group_priv.h"
 
static unlang_action_t unlang_caller(unlang_result_t *p_result, request_t *request, unlang_stack_frame_t *frame)
{
        unlang_group_t                  *g = unlang_generic_to_group(frame->instruction);
        unlang_caller_t                 *gext = unlang_group_to_caller(g);
 
        fr_assert(g->num_children > 0); /* otherwise the compilation is broken */
 
        /*
         *      No parent, or the dictionaries don't match.  Ignore it.
         */
        if (!request->parent || (request->parent->proto_dict != gext->dict)) {
                RDEBUG2("...");
                return UNLANG_ACTION_EXECUTE_NEXT;
        }
 
        /*
         *      The dictionary matches.  Go recurse into its' children.
         */
        return unlang_group(p_result, request, frame);
}
 
 
void unlang_caller_init(void)
{
        unlang_register(UNLANG_TYPE_CALLER,
                           &(unlang_op_t){
                                .name = "caller",
                                .type = UNLANG_TYPE_CALLER,
                                .flag = UNLANG_OP_FLAG_DEBUG_BRACES,
 
                                .interpret = unlang_caller,
 
                                .unlang_size = sizeof(unlang_caller_t),
                                .unlang_name = "unlang_caller_t",
                           });
}