amxo_parser_dm_utils.c

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** SPDX-License-Identifier: BSD-2-Clause-Patent
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** SPDX-FileCopyrightText: Copyright (c) 2023 SoftAtHome
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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
 
#include "amxo_parser_priv.h"
#include "amxo_parser.tab.h"
#include "amxo_parser_hooks_priv.h"
 
static int object_actions[] = {
    action_any,
    action_object_read,      // action_read,
    action_object_write,     // action_write
    action_object_validate,  // action_validate
    action_object_list,      // action_list
    action_object_describe,  // action_describe
    action_object_add_inst,  // action_add_inst
    action_object_del_inst,  // action_del_inst
    action_object_destroy,   // action_destroy
    action_invalid,          // action_translate
    action_invalid,          // action apply
};
 
static int param_actions[] = {
    action_any,
    action_param_read,      // action_read,
    action_param_write,     // action_write
    action_param_validate,  // action_validate
    action_invalid,         // action_list
    action_param_describe,  // action_describe
    action_invalid,         // action_add_inst
    action_invalid,         // action_del_inst
    action_param_destroy,   // action_destroy
    action_invalid,         // action_translate
    action_invalid,         // action_apply
};
 
static int sync_actions[] = {
    action_invalid,
    action_invalid,         // action_read,
    action_invalid,         // action_write
    action_invalid,         // action_validate
    action_invalid,         // action_list
    action_invalid,         // action_describe
    action_invalid,         // action_add_inst
    action_invalid,         // action_del_inst
    action_invalid,         // action_destroy
    action_translate,       // action_translate
    action_apply,           // action_apply
};
 
static void amxo_parser_push_event(amxo_parser_t* pctx,
                                   event_id_t event) {
    event_t* e = (event_t*) calloc(1, sizeof(event_t));
    e->id = event;
    e->path = amxd_object_get_path(pctx->object, AMXD_OBJECT_TERMINATE | AMXD_OBJECT_INDEXED);
    amxc_var_init(&e->data);
 
    amxc_llist_append(&pctx->event_list, &e->it);
}
 
static amxd_status_t amxo_cleanup_data(amxd_object_t* const object,
                                       amxd_param_t* const param,
                                       amxd_action_t reason,
                                       UNUSED const amxc_var_t* const args,
                                       UNUSED amxc_var_t* const retval,
                                       void* priv) {
    amxd_status_t status = amxd_status_ok;
    amxc_var_t* data = (amxc_var_t*) priv;
 
    // action private data must not be removed when the action is used
    // on derivced objects.
    // only remove action data when the action is owned by the object or
    // parameter on which the action is called.
    if(reason == action_object_destroy) {
        if(amxd_object_has_action_cb(object, reason, amxo_cleanup_data)) {
            amxc_var_delete(&data);
            amxd_object_set_action_cb_data(object, reason, amxo_cleanup_data, NULL);
        }
    } else {
        if(amxd_param_has_action_cb(param, reason, amxo_cleanup_data)) {
            amxc_var_delete(&data);
            amxd_param_set_action_cb_data(param, reason, amxo_cleanup_data, NULL);
        }
    }
 
    return status;
}
 
static amxd_status_t amxo_parser_set_param_action_impl(amxd_param_t* param,
                                                       amxd_action_t action,
                                                       amxd_action_fn_t fn,
                                                       amxc_var_t* data) {
    amxd_status_t status = amxd_status_ok;
 
    status = amxd_param_add_action_cb(param, action, fn, data);
    if((data != NULL) && (status == amxd_status_ok)) {
        status = amxd_param_add_action_cb(param,
                                          action_param_destroy,
                                          amxo_cleanup_data,
                                          data);
        if(status != amxd_status_ok) {
            amxd_param_remove_action_cb(param, action, fn);
        }
    }
 
    return status;
}
 
static amxd_status_t amxo_parser_set_object_action_impl(amxd_object_t* object,
                                                        amxd_action_t action,
                                                        amxd_action_fn_t fn,
                                                        amxc_var_t* data) {
    amxd_status_t status = amxd_status_ok;
 
    status = amxd_object_add_action_cb(object, action, fn, data);
    if((data != NULL) && (status == amxd_status_ok)) {
        status = amxd_object_add_action_cb(object,
                                           action_object_destroy,
                                           amxo_cleanup_data,
                                           data);
        if(status != amxd_status_ok) {
            amxd_object_remove_action_cb(object, action, fn);
        }
    }
 
    return status;
}
 
static int amxo_parser_set_sync_action(amxo_parser_t* pctx,
                                       amxo_action_t action,
                                       UNUSED const char* name,
                                       UNUSED amxc_var_t* data) {
    int retval = -1;
    amxd_action_t dm_action = (amxd_action_t) sync_actions[action];
    bool resolve = !amxo_parser_no_resolve(pctx) && pctx->resolved_fn != NULL;
 
    switch(dm_action) {
    case action_translate:
        if(resolve) {
            pctx->status = amxo_parser_sync_set_translator(pctx,
                                                           (amxs_translation_cb_t) pctx->resolved_fn);
        }
        break;
    case action_apply:
        if(resolve) {
            pctx->status = amxo_parser_sync_set_action(pctx,
                                                       (amxs_action_cb_t) pctx->resolved_fn);
        }
        break;
    default:
        pctx->status = amxd_status_invalid_action;
        amxo_parser_msg(pctx, "Invalid synchronisation action (action id = %d)", action);
        break;
    }
 
    retval = pctx->status == amxd_status_ok? 0:-1;
 
    return retval;
}
 
static int amxo_parser_set_param_action(amxo_parser_t* pctx,
                                        amxo_action_t action,
                                        const char* name,
                                        amxc_var_t* data) {
    int retval = -1;
    amxd_action_t dm_action = (amxd_action_t) param_actions[action];
    bool resolve = !amxo_parser_no_resolve(pctx) && pctx->resolved_fn != NULL;
 
    if(dm_action == action_invalid) {
        pctx->status = amxd_status_invalid_action;
        amxo_parser_msg(pctx, "Invalid parameter action (action id = %d)", action);
        goto exit;
    }
    if(resolve) {
        pctx->status = amxo_parser_set_param_action_impl(pctx->param,
                                                         dm_action,
                                                         (amxd_action_fn_t) pctx->resolved_fn,
                                                         data);
    }
 
    if(pctx->status == amxd_status_ok) {
        amxo_hooks_set_action_cb(pctx, pctx->object, pctx->param, dm_action, name, data);
        retval = 0;
    } else {
        amxo_parser_msg(pctx, "Invalid parameter action (action id = %d)", action);
    }
 
exit:
    return retval;
}
 
static int amxo_parser_set_object_action(amxo_parser_t* pctx,
                                         amxo_action_t action,
                                         const char* name,
                                         amxc_var_t* data) {
    int retval = -1;
    amxd_action_t dm_action = (amxd_action_t) object_actions[action];
    bool resolve = !amxo_parser_no_resolve(pctx) && pctx->resolved_fn != NULL;
 
    if(dm_action == action_invalid) {
        pctx->status = amxd_status_invalid_action;
        amxo_parser_msg(pctx, "Invalid object action (action id = %d)", action);
        goto exit;
    }
    if(resolve) {
        pctx->status = amxo_parser_set_object_action_impl(pctx->object,
                                                          dm_action,
                                                          (amxd_action_fn_t) pctx->resolved_fn,
                                                          data);
    }
 
    if(pctx->status == amxd_status_ok) {
        amxo_hooks_set_action_cb(pctx, pctx->object, NULL, dm_action, name, data);
        retval = 0;
    } else {
        amxo_parser_msg(pctx, "Invalid object (action id = %d)", action);
    }
 
exit:
    return retval;
}
 
static int64_t amxo_attr_2_object_attr(int64_t attributes) {
    int64_t obj_attrs = 0;
    if(SET_BIT(attr_readonly) & attributes) {
        obj_attrs |= SET_BIT(amxd_oattr_read_only);
    }
    if(SET_BIT(attr_persistent) & attributes) {
        obj_attrs |= SET_BIT(amxd_oattr_persistent);
    }
    if(SET_BIT(attr_private) & attributes) {
        obj_attrs |= SET_BIT(amxd_oattr_private);
    }
    if(SET_BIT(attr_protected) & attributes) {
        obj_attrs |= SET_BIT(amxd_oattr_protected);
    }
    return obj_attrs;
}
 
static amxd_object_t* amxo_parser_new_object(amxo_parser_t* pctx,
                                             amxd_dm_t* dm,
                                             const char* name,
                                             int64_t oattrs,
                                             amxd_object_type_t type) {
    amxd_object_t* object = NULL;
    const char* type_name = type == amxd_object_mib ? "mib" : "object";
 
    pctx->status = amxd_object_new(&object, type, name);
    if(pctx->status != amxd_status_ok) {
        amxo_parser_msg(pctx, "Failed to create %s %s", type_name, name);
        goto exit;
    }
    if(type == amxd_object_mib) {
        pctx->status = amxd_dm_store_mib(dm, object);
    } else {
        amxd_object_set_attrs(object, oattrs, true);
        pctx->status = amxd_object_add_object(pctx->object, object);
    }
 
exit:
    return object;
}
 
static int amxo_parser_can_update_object(amxo_parser_t* pctx,
                                         const char* name,
                                         amxd_object_type_t type) {
    int retval = 0;
    const char* type_name = type == amxd_object_mib ? "mib" : "object";
    if(amxo_parser_check_config(pctx,
                                "define-behavior.existing-object",
                                "update")) {
        pctx->status = amxd_status_ok;
        goto exit;
    }
    amxo_parser_msg(pctx, "Duplicate %s %s", type_name, name);
    pctx->status = amxd_status_duplicate;
    retval = -1;
 
exit:
    return retval;
}
 
static amxd_object_t* amxo_parser_can_update_instance(amxo_parser_t* pctx,
                                                      uint32_t index,
                                                      const char* name,
                                                      amxc_var_t* params) {
    amxd_object_t* object = NULL;
    if(!amxo_parser_check_config(pctx,
                                 "populate-behavior.duplicate-instance",
                                 "update")) {
        amxo_parser_msg(pctx, "Duplicate instance");
        goto exit;
    }
    if(params != NULL) {
        amxp_expr_t* expr = NULL;
        amxd_object_new_key_expr(pctx->object, &expr, params);
        object = amxd_object_find_instance(pctx->object, expr);
        amxp_expr_delete(&expr);
    }
    if(object == NULL) {
        object = amxd_object_get_instance(pctx->object, name, index);
    }
 
exit:
    return object;
}
 
static int amxo_parser_connect(amxo_parser_t* pctx,
                               amxp_signal_mngr_t* const sig_mngr,
                               const char* const signal_name,
                               bool signal_is_regexp,
                               const char* const expression,
                               amxp_slot_fn_t fn) {
    int retval = 0;
 
    if(signal_is_regexp) {
        retval = amxp_slot_connect_filtered(sig_mngr,
                                            signal_name,
                                            expression,
                                            fn,
                                            pctx->resolved_fn_name);
    } else {
        retval = amxp_slot_connect(sig_mngr,
                                   signal_name,
                                   expression,
                                   fn,
                                   pctx->resolved_fn_name);
    }
    if(retval != 0) {
        retval = -1;
        pctx->status = amxd_status_invalid_value;
        if(expression != NULL) {
            amxo_parser_msg(pctx, "Subscribe failed : %s", expression);
        } else {
            amxo_parser_msg(pctx, "Subscribe failed : %s", signal_name);
        }
        amxc_string_delete(&pctx->resolved_fn_name);
    } else {
        amxc_llist_append(&pctx->function_names, &pctx->resolved_fn_name->it);
        pctx->resolved_fn_name = NULL;
    }
 
    pctx->resolved_fn_name = NULL;
    return retval;
}
 
static amxd_object_t* amxd_parser_add_instance_msg(amxo_parser_t* pctx,
                                                   uint32_t index,
                                                   const char* name,
                                                   amxd_object_t* object,
                                                   amxc_var_t* params) {
    switch(pctx->status) {
    case amxd_status_ok:
        break;
    case amxd_status_invalid_name:
        amxo_parser_msg(pctx, "Failed to create instance %s - invalid name", name);
        break;
    case amxd_status_invalid_type:
        amxo_parser_msg(pctx,
                        "Failed to create instance %s - parent is not a template object",
                        name);
        break;
    case amxd_status_duplicate:
        object = amxo_parser_can_update_instance(pctx, index, name, params);
        if(object != NULL) {
            pctx->status = amxd_status_ok;
        }
        break;
    case amxd_status_missing_key:
        amxo_parser_msg(pctx, "Failed to create instance %s - missing key(s)", name);
        break;
    default:
        amxo_parser_msg(pctx, "Failed to create instance %s", name);
        break;
    }
 
    return object;
}
 
static void amxo_parser_build_path_expr(amxd_object_t* object, amxc_string_t* expr) {
    bool regexp = false;
 
    if(amxd_object_get_type(object) == amxd_object_template) {
        regexp = true;
        amxc_string_prependf(expr,
                             "%s\\.[0-9]*.{0,1}",
                             amxd_object_get_name(object, AMXD_OBJECT_NAMED));
    } else {
        amxc_string_prependf(expr,
                             "%s\\.",
                             amxd_object_get_name(object, AMXD_OBJECT_NAMED));
    }
    object = amxd_object_get_parent(object);
 
    while(object != NULL && amxd_object_get_parent(object) != NULL) {
        switch(amxd_object_get_type(object)) {
        case amxd_object_template:
            regexp = true;
            amxc_string_prependf(expr,
                                 "%s\\.[0-9]+\\.",
                                 amxd_object_get_name(object, AMXD_OBJECT_NAMED));
            break;
        case amxd_object_singleton:
            amxc_string_prependf(expr,
                                 "%s\\.",
                                 amxd_object_get_name(object, AMXD_OBJECT_NAMED));
            break;
        default:
            break;
        }
        object = amxd_object_get_parent(object);
    }
 
    if(regexp) {
        amxc_string_prepend(expr, "(path matches '^", 16);
        amxc_string_append(expr, "$')", 3);
    } else {
        amxc_string_replace(expr, "\\", "", UINT32_MAX);
        amxc_string_prepend(expr, "(path == '", 10);
        amxc_string_append(expr, "')", 2);
    }
}
 
bool amxo_parser_check_config(amxo_parser_t* pctx,
                              const char* path,
                              const char* check) {
    amxc_var_t* option = amxc_var_get_path(&pctx->config,
                                           path,
                                           AMXC_VAR_FLAG_DEFAULT);
    const char* value = NULL;
    value = amxc_var_constcast(cstring_t, option);
 
    if(value == NULL) {
        value = "error";
    }
 
    return strcmp(value, check) == 0;
}
 
void amxo_parser_free_event(amxc_llist_it_t* it) {
    event_t* e = amxc_container_of(it, event_t, it);
    amxc_var_clean(&e->data);
    free(e);
}
 
bool amxo_parser_check_attr(amxo_parser_t* pctx,
                            int64_t attributes,
                            int64_t bitmask) {
    bool retval = false;
    int attr_mask = ~bitmask;
 
    int check_attr = attributes | attr_mask;
    pctx->status = (check_attr != attr_mask) ? amxd_status_ok : amxd_status_invalid_attr;
    retval = (check_attr != attr_mask);
    if(!retval) {
        amxo_parser_msg(pctx, "Invalid attributes given");
    }
    return retval;
}
 
bool amxo_parser_set_object_attrs(amxo_parser_t* pctx, uint64_t attr, bool enable) {
    int64_t oattrs = amxo_attr_2_object_attr(attr);
    amxd_object_set_attrs(pctx->object, oattrs, enable);
    return true;
}
 
int amxo_parser_create_object(amxo_parser_t* pctx,
                              const char* name,
                              int64_t attr_bitmask,
                              amxd_object_type_t type) {
    amxd_object_t* object = NULL;
    amxc_string_t res_name;
    int64_t oattrs = amxo_attr_2_object_attr(attr_bitmask);
    int retval = -1;
    amxd_dm_t* dm = amxd_object_get_dm(pctx->object);
 
    amxc_string_init(&res_name, 0);
 
    if(amxc_string_set_resolved(&res_name, name, &pctx->config) > 0) {
        name = amxc_string_get(&res_name, 0);
    }
 
    pctx->status = amxd_status_ok;
    if(type == amxd_object_mib) {
        object = amxd_dm_get_mib(dm, name);
    } else {
        object = amxd_object_findf(pctx->object, "%s", name);
    }
    if(object == NULL) {
        object = amxo_parser_new_object(pctx, dm, name, oattrs, type);
        when_null(object, exit);
    } else {
        retval = amxo_parser_can_update_object(pctx, name, type);
        when_true(retval < 0, exit);
        amxd_object_set_attrs(object, oattrs, true);
    }
 
    amxo_hooks_create_object(pctx, name, oattrs, type);
 
    amxc_astack_push(&pctx->object_stack, pctx->object);
    pctx->object = object;
    amxo_parser_push_event(pctx, event_none);
    retval = 0;
 
exit:
    amxc_string_clean(&res_name);
    return retval;
}
 
bool amxo_parser_add_instance(amxo_parser_t* pctx,
                              uint32_t index,
                              const char* name,
                              amxc_var_t* params) {
    amxd_object_t* object = NULL;
    amxd_object_t* parent_obj = pctx->object;
    bool retval = false;
    amxc_string_t res_name;
    amxc_string_init(&res_name, 0);
 
    if(amxc_string_set_resolved(&res_name, name, &pctx->config) > 0) {
        name = amxc_string_get(&res_name, 0);
    }
 
    pctx->status = amxd_object_add_instance(&object,
                                            parent_obj,
                                            name,
                                            index,
                                            params);
    object = amxd_parser_add_instance_msg(pctx, index, name, object, params);
    when_null(object, exit);
    when_failed(pctx->status, exit);
    amxo_hooks_add_instance(pctx, amxd_object_get_index(object),
                            amxd_object_get_name(object, AMXD_OBJECT_NAMED));
    amxc_astack_push(&pctx->object_stack, pctx->object);
    pctx->object = object;
    amxo_parser_push_event(pctx, event_instance_add);
    retval = true;
 
exit:
    amxc_string_clean(&res_name);
    amxc_var_delete(&params);
    return retval;
}
 
bool amxo_parser_push_object(amxo_parser_t* pctx,
                             const char* path) {
    amxd_object_t* object = NULL;
    bool retval = false;
    amxc_string_t res_path;
    amxc_string_init(&res_path, 0);
 
    if(amxc_string_set_resolved(&res_path, path, &pctx->config) > 0) {
        path = amxc_string_get(&res_path, 0);
    }
 
    pctx->status = amxd_status_ok;
    object = amxd_object_findf(pctx->object, "%s", path);
    if(object == NULL) {
        char* parent_path = amxd_object_get_path(pctx->object, AMXD_OBJECT_NAMED);
        amxo_parser_msg(pctx,
                        "Object %s not found (start searching from \"%s\")",
                        path,
                        parent_path == NULL ? "root" : parent_path);
        free(parent_path);
        pctx->status = amxd_status_object_not_found;
        goto exit;
    }
 
    amxo_hooks_select_object(pctx, path);
 
    amxc_astack_push(&pctx->object_stack, pctx->object);
    pctx->object = object;
    amxo_parser_push_event(pctx, event_object_change);
    retval = true;
 
exit:
    amxc_string_clean(&res_path);
    return retval;
}
 
bool amxo_parser_pop_object(amxo_parser_t* pctx) {
    bool retval = false;
    amxd_object_type_t type = amxd_object_get_type(pctx->object);
    const char* type_name = (type == amxd_object_mib) ? "mib" : "object";
    amxc_var_t args;
 
    pctx->status = amxd_object_validate(pctx->object, 0);
 
    amxc_var_init(&args);
    amxc_var_set_type(&args, AMXC_VAR_ID_HTABLE);
 
    if(pctx->status != amxd_status_ok) {
        amxo_parser_msg(pctx, "%s %s validation failed",
                        type_name,
                        amxd_object_get_name(pctx->object, AMXD_OBJECT_NAMED));
        goto exit;
    }
 
    amxd_dm_invoke_action(pctx->object, NULL, action_object_write, &args, NULL);
    amxo_hooks_end_object(pctx);
 
    pctx->object = (amxd_object_t*) amxc_astack_pop(&pctx->object_stack);
 
    retval = true;
 
exit:
    amxc_var_clean(&args);
    return retval;
}
 
bool amxo_parser_set_counter(amxo_parser_t* pctx,
                             const char* param_name) {
    bool retval = false;
    amxc_string_t res_param_name;
    amxc_string_init(&res_param_name, 0);
 
    if(amxc_string_set_resolved(&res_param_name, param_name, &pctx->config) > 0) {
        param_name = amxc_string_get(&res_param_name, 0);
    }
 
    pctx->status = amxd_object_set_counter(pctx->object, param_name);
    if(pctx->status != amxd_status_ok) {
        char* path = amxd_object_get_path(pctx->object, AMXD_OBJECT_NAMED);
        amxo_parser_msg(pctx,
                        "Failed to to set instance counter %s on %s",
                        param_name,
                        path);
        pctx->status = amxd_status_duplicate;
        free(path);
        goto exit;
    }
 
    amxo_hooks_set_counter(pctx, param_name);
 
    retval = true;
 
exit:
    amxc_string_clean(&res_param_name);
    return retval;
}
 
int amxo_parser_subscribe_path(amxo_parser_t* pctx,
                               const char* event,
                               bool event_is_regexp,
                               const char* path,
                               bool path_is_regexp) {
    int retval = 1;
    amxc_string_t res_path;
    amxc_string_t expression;
    const char* expr = NULL;
    amxd_dm_t* dm = amxd_object_get_dm(pctx->object);
    amxp_slot_fn_t fn = (amxp_slot_fn_t) pctx->resolved_fn;
 
    amxc_string_init(&expression, 0);
    amxc_string_init(&res_path, 0);
 
    when_true_status(amxo_parser_no_resolve(pctx), exit, retval = 0);
    when_null(dm, exit);
 
    if(pctx->resolved_fn == NULL) {
        amxo_parser_msg(pctx,
                        "No event subscription created - no function was resolved");
        pctx->status = amxd_status_ok;
        goto exit;
    }
 
    if(amxc_string_set_resolved(&res_path, path, &pctx->config) > 0) {
        path = amxc_string_get(&res_path, 0);
    }
    if(path_is_regexp) {
        amxc_string_appendf(&expression, "object matches \"%s\" || path matches \"%s\"", path, path);
    } else {
        amxc_string_appendf(&expression, "object starts with \"%s\" || path starts with \"%s\"", path, path);
    }
    expr = amxc_string_get(&expression, 0);
    retval = amxo_parser_connect(pctx, &dm->sigmngr, event, event_is_regexp, expr, fn);
 
exit:
    amxc_string_clean(&expression);
    amxc_string_clean(&res_path);
 
    return retval;
}
 
int amxo_parser_subscribe(amxo_parser_t* pctx,
                          const char* event,
                          bool event_is_regexp,
                          const char* full_expr) {
    int retval = 1;
    amxd_dm_t* dm = amxd_object_get_dm(pctx->object);
    amxp_slot_fn_t fn = (amxp_slot_fn_t) pctx->resolved_fn;
 
    when_true_status(amxo_parser_no_resolve(pctx), exit, retval = 0);
    when_null(dm, exit);
 
    if(pctx->resolved_fn == NULL) {
        amxo_parser_msg(pctx,
                        "No event subscription created - no function was resolved");
        pctx->status = amxd_status_ok;
        goto exit;
    }
 
    if(full_expr != NULL) {
        amxc_string_t res_expr;
        amxc_string_init(&res_expr, 0);
        if(amxc_string_set_resolved(&res_expr, full_expr, &pctx->config) > 0) {
            full_expr = amxc_string_get(&res_expr, 0);
        }
        retval = amxo_parser_connect(pctx, &dm->sigmngr, event, event_is_regexp, full_expr, fn);
        amxc_string_clean(&res_expr);
    } else {
        retval = amxo_parser_connect(pctx, &dm->sigmngr, event, event_is_regexp, NULL, fn);
    }
 
exit:
    return retval;
}
 
int amxo_parser_subscribe_object(amxo_parser_t* pctx,
                                 const char* event,
                                 bool event_is_regexp,
                                 const char* full_expr) {
    int retval = 1;
    amxd_dm_t* dm = amxd_object_get_dm(pctx->object);
    amxp_slot_fn_t fn = (amxp_slot_fn_t) pctx->resolved_fn;
    amxc_string_t path_expr;
 
    amxc_string_init(&path_expr, 0);
 
    when_true_status(amxo_parser_no_resolve(pctx), exit, retval = 0);
    when_null(dm, exit);
 
    if(pctx->resolved_fn == NULL) {
        amxo_parser_msg(pctx,
                        "No event subscription created - no function was resolved");
        pctx->status = amxd_status_ok;
        goto exit;
    }
 
    amxo_parser_build_path_expr(pctx->object, &path_expr);
    if((full_expr != NULL) && (*full_expr != 0)) {
        if(amxc_string_is_empty(&path_expr)) {
            amxc_string_set(&path_expr, full_expr);
        } else {
            amxc_string_appendf(&path_expr, " && (%s)", full_expr);
        }
    }
    retval = amxo_parser_connect(pctx,
                                 &dm->sigmngr,
                                 event,
                                 event_is_regexp,
                                 amxc_string_get(&path_expr, 0),
                                 fn);
 
exit:
    amxc_string_clean(&path_expr);
    return retval;
}
 
int amxo_parser_set_action(amxo_parser_t* pctx,
                           amxo_action_t action,
                           const char* name,
                           amxc_var_t* data) {
 
    int retval = -1;
    bool resolve = !amxo_parser_no_resolve(pctx);
    pctx->status = amxd_status_ok;
 
    if((pctx->sync_contexts != NULL) && amxo_parser_is_sync_item(pctx)) {
        retval = amxo_parser_set_sync_action(pctx, action, name, data);
    } else if(pctx->param != NULL) {
        retval = amxo_parser_set_param_action(pctx, action, name, data);
    } else {
        retval = amxo_parser_set_object_action(pctx, action, name, data);
    }
 
    if((pctx->resolved_fn == NULL) && resolve) {
        retval = 1;
        pctx->status = amxd_status_file_not_found;
        amxo_parser_msg(pctx, "Action %d not set - no function resolved", action);
    }
 
    amxc_string_delete(&pctx->resolved_fn_name);
    if((retval != 0) || !resolve) {
        amxc_var_delete(&data);
    }
    return retval;
}
 
bool amxo_parser_add_mib(amxo_parser_t* pctx,
                         const char* mib_name) {
    bool retval = false;
    amxd_dm_t* dm = amxd_object_get_dm(pctx->object);
    amxd_object_t* mib = NULL;
    amxc_string_t res_mib_name;
    amxc_string_init(&res_mib_name, 0);
 
    if(amxc_string_set_resolved(&res_mib_name, mib_name, &pctx->config) > 0) {
        mib_name = amxc_string_get(&res_mib_name, 0);
    }
 
    when_null(dm, exit);
 
    if(amxd_object_has_mib(pctx->object, mib_name)) {
        retval = true;
        goto exit;
    }
 
    mib = amxd_dm_get_mib(dm, mib_name);
    if(mib == NULL) {
        const char* file = amxo_parser_get_mib_file(pctx, mib_name);
        if(file != NULL) {
            amxo_parser_include(pctx, file);
            mib = amxd_dm_get_mib(dm, mib_name);
        }
        if(mib == NULL) {
            amxo_parser_msg(pctx, "MIB %s is not found", mib_name);
            pctx->status = amxd_status_object_not_found;
            goto exit;
        }
    }
 
    pctx->status = amxd_object_add_mib(pctx->object, mib_name);
    if(pctx->status != amxd_status_ok) {
        amxo_parser_msg(pctx,
                        "Failed to add MIB %s on object %s",
                        mib_name,
                        amxd_object_get_name(pctx->object, AMXD_OBJECT_NAMED));
        goto exit;
    }
 
    retval = true;
 
    amxo_hooks_add_mib(pctx, mib_name);
 
exit:
    amxc_string_clean(&res_mib_name);
    return retval;
}