1 // Copyright 2021 Ian Jackson and contributors to Hippotat
2 // SPDX-License-Identifier: AGPL-3.0-or-later
3 // There is NO WARRANTY.
7 use configparser::ini::Ini;
9 #[derive(StructOpt,Debug)]
11 /// Top-level config file or directory
13 /// Look for `main.cfg`, `config.d` and `secrets.d` here.
15 /// Or if this is a file, just read that file.
16 #[structopt(long, default_value="/etc/hippotat")]
19 /// Additional config files or dirs, which can override the others
20 #[structopt(long, multiple=true, number_of_values=1)]
21 pub extra_config: Vec<PathBuf>,
24 pub struct CidrString(pub String);
26 pub struct InstanceConfig {
27 // Exceptional settings
33 pub max_batch_down: u32,
34 pub max_queue_time: Duration,
35 pub http_timeout: Duration,
38 pub target_requests_outstanding: u32,
39 pub addrs: Vec<IpAddr>,
40 pub vnetwork: Vec<CidrString>,
41 pub vaddr: Vec<IpAddr>,
45 pub ifname_server: String,
46 pub ifname_client: String,
48 // Ordinary settings, used by server only:
49 pub max_clock_skew: Duration,
51 // Ordinary settings, used by client only:
52 pub http_timeout_grace: Duration,
53 pub max_requests_outstanding: u32,
54 pub max_batch_up: u32,
55 pub http_retry: Duration,
57 pub vroutes: Vec<CidrString>,
60 type SectionMap = HashMap<String, Option<String>>;
66 static OUTSIDE_SECTION: &str = "[";
68 #[derive(Default,Debug)]
70 sections: HashMap<String, SectionMap>,
73 type OkAnyway<'f,A> = &'f dyn Fn(ErrorKind) -> Option<A>;
75 impl<'f,A> OkAnyway<'f,A> {
76 fn ok<T>(self, r: &Result<T, io::Error>) -> Option<A> {
77 let e = r.as_ref().err()?;
85 #[throws(AE)] // AE does not include path
86 fn read_file<A>(&mut self, path: &Path, anyway: OkAnyway<A>) -> Option<A>
88 let f = fs::File::open(path);
89 if let Some(anyway) = anyway.ok(&f) { return Some(anyway) }
90 let mut f = f.context("open")?;
92 let mut s = String::new();
93 f.read_to_string(&mut s).context("read")?;
95 let mut ini = Ini::new_cs();
96 ini.set_default_section(OUTSIDE_SECTION);
97 ini.read(s).map_err(|e| anyhow!("{}", e)).context("parse as INI")?;
98 let mut map = mem::take(ini.get_mut_map());
99 if map.get(OUTSIDE_SECTION).is_some() {
100 throw!(anyhow!("INI file contains settings outside a section"));
103 // xxx parse section names here
104 // xxx save Arc<PathBuf> where we found each item
106 self.sections.extend(map.drain());
110 #[throws(AE)] // AE includes path
111 fn read_dir_d<A>(&mut self, path: &Path, anyway: OkAnyway<A>) -> Option<A>
113 let dir = fs::read_dir(path);
114 if let Some(anyway) = anyway.ok(&dir) { return Some(anyway) }
115 let dir = dir.context("open directory").dcontext(path)?;
117 let ent = ent.context("read directory").dcontext(path)?;
118 let leaf = ent.file_name();
119 let leaf = leaf.to_str();
120 let leaf = if let Some(leaf) = leaf { leaf } else { continue }; //utf8?
121 if leaf.len() == 0 { continue }
122 if ! leaf.chars().all(
123 |c| c=='-' || c=='_' || c.is_ascii_alphanumeric()
126 // OK we want this one
127 let ent = ent.path();
128 self.read_file(&ent, &|_| None::<Void>).dcontext(&ent)?;
133 #[throws(AE)] // AE includes everything
134 fn read_toplevel(&mut self, toplevel: &Path) {
135 enum Anyway { None, Dir }
136 match self.read_file(toplevel, &|k| match k {
137 EK::NotFound => Some(Anyway::None),
138 EK::IsADirectory => Some(Anyway::Dir),
141 .dcontext(toplevel).context("top-level config directory (or file)")?
143 None | Some(Anyway::None) => { },
145 Some(Anyway::Dir) => {
147 let anyway_none = |k| match k {
148 EK::NotFound => Some(AnywayNone),
152 let mk = |leaf: &str| {
153 [ toplevel, &PathBuf::from(leaf) ]
154 .iter().collect::<PathBuf>()
157 for &(try_main, desc) in &[
158 ("main.cfg", "main config file"),
159 ("master.cfg", "obsolete-named main config file"),
161 let main = mk(try_main);
163 match self.read_file(&main, &anyway_none)
164 .dcontext(main).context(desc)?
167 Some(AnywayNone) => { },
171 for &(try_dir, desc) in &[
172 ("config.d", "per-link config directory"),
173 ("secrets.d", "per-link secrets directory"),
175 let dir = mk(try_dir);
176 match self.read_dir_d(&dir, &anyway_none).context(desc)? {
178 Some(AnywayNone) => { },
185 #[throws(AE)] // AE includes extra, but does that this is extra
186 fn read_extra(&mut self, extra: &Path) {
189 match self.read_file(extra, &|k| match k {
190 EK::IsADirectory => Some(AnywayDir),
197 self.read_dir_d(extra, &|_| None::<Void>)?;
207 let opts = config::Opts::from_args();
210 let mut agg = Aggregate::default();
212 agg.read_toplevel(&opts.config)?;
213 for extra in &opts.extra_config {
214 agg.read_extra(extra).context("extra config")?;
217 eprintln!("GOT {:?}", agg);
220 })().context("read configuration")?;