cdns_rs/a_sync/
cfg_resolv_parser.rs

1/*-
2 * cdns-rs - a simple sync/async DNS query library
3 * 
4 * Copyright (C) 2020  Aleksandr Morozov
5 * 
6 * Copyright 2025 Aleksandr Morozov
7 * 
8 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by
9 * the European Commission - subsequent versions of the EUPL (the "Licence").
10 * 
11 * You may not use this work except in compliance with the Licence.
12 * 
13 * You may obtain a copy of the Licence at:
14 * 
15 *    https://joinup.ec.europa.eu/software/page/eupl
16 * 
17 * Unless required by applicable law or agreed to in writing, software
18 * distributed under the Licence is distributed on an "AS IS" basis, WITHOUT
19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
20 * Licence for the specific language governing permissions and limitations
21 * under the Licence.
22 */
23
24/// This file contains the config file parsers.
25
26
27use std::path::Path;
28
29use async_trait::async_trait;
30
31
32use crate::cfg_resolv_parser::{ResolveConfig, OptionFlags};
33use crate::error::*;
34
35use super::caches::CacheOperations;
36use super::cfg_parsers::{ConfigParser, read_file};
37use super::common::{RESOLV_CFG_PATH, RESOLV_CFG_PATH_P};
38use super::log::async_log_writer;
39
40
41impl CacheOperations for ResolveConfig
42{
43    fn is_reload_allowed(&self) -> bool 
44    {
45        return !self.option_flags.contains(OptionFlags::OPT_NO_RELOAD);
46    }
47}
48
49
50#[async_trait]
51impl ConfigParser<ResolveConfig> for ResolveConfig
52{
53    async 
54    fn parse_config() -> CDnsResult<Self>
55    {
56        let file_content = read_file(RESOLV_CFG_PATH).await?;
57        
58        let mut writer = Writer::new();
59
60        let ret = Self::parser_resolv_internal(file_content.as_str(), &mut writer);
61
62        async_log_writer(writer).await;
63
64        return ret;
65    }
66
67    fn get_file_path() -> &'static Path
68    {
69        return &RESOLV_CFG_PATH_P;
70    }
71
72    fn is_default(&self) -> bool
73    {
74        return self.nameservers.is_empty();
75    }
76}
77
78impl ResolveConfig
79{
80    /// This function should be used when the program which uses this library
81    /// requires to override the systems /etc/resolv.conf
82    pub async 
83    fn async_custom_config(resolv_cfg: &str) -> CDnsResult<Self>
84    {
85        let mut writer = Writer::new();
86        
87        let ret = Self::parser_resolv_internal(resolv_cfg, &mut writer);
88
89        async_log_writer(writer).await;
90
91        return ret;
92    }
93}
94
95
cdns_rs/a_sync/cfg_resolv_parser.rs

cdns_rs/a_sync/
cfg_resolv_parser.rs
