3c858ed7c4 2026-07-31 1: mod mail;
3c858ed7c4 2026-07-31 2: mod telegram;
3c858ed7c4 2026-07-31 3: pub mod utils;
3c858ed7c4 2026-07-31 4:
3c858ed7c4 2026-07-31 5: use crate::mail::MailServer;
3c858ed7c4 2026-07-31 6:
3c858ed7c4 2026-07-31 7: use just_getopt::{
3c858ed7c4 2026-07-31 8: OptFlags,
3c858ed7c4 2026-07-31 9: OptSpecs,
3c858ed7c4 2026-07-31 10: OptValue,
3c858ed7c4 2026-07-31 11: };
3c858ed7c4 2026-07-31 12: use smol::{
3c858ed7c4 2026-07-31 13: fs::metadata,
3c858ed7c4 2026-07-31 14: };
3c858ed7c4 2026-07-31 15: use stacked_errors::{
3c858ed7c4 2026-07-31 16: Result,
3c858ed7c4 2026-07-31 17: StackableErr,
3c858ed7c4 2026-07-31 18: bail,
3c858ed7c4 2026-07-31 19: };
3c858ed7c4 2026-07-31 20:
3c858ed7c4 2026-07-31 21: use std::{
3c858ed7c4 2026-07-31 22: io::Cursor,
3c858ed7c4 2026-07-31 23: os::unix::fs::PermissionsExt,
3c858ed7c4 2026-07-31 24: path::Path,
3c858ed7c4 2026-07-31 25: };
3c858ed7c4 2026-07-31 26:
3c858ed7c4 2026-07-31 27: /// Actual main function running async with Error propagation support
3c858ed7c4 2026-07-31 28: pub async fn async_main () -> Result<()> {
3c858ed7c4 2026-07-31 29: let specs = OptSpecs::new()
3c858ed7c4 2026-07-31 30: .option("help", "h", OptValue::None)
3c858ed7c4 2026-07-31 31: .option("help", "help", OptValue::None)
3c858ed7c4 2026-07-31 32: .option("config", "c", OptValue::Required)
3c858ed7c4 2026-07-31 33: .option("config", "config", OptValue::Required)
3c858ed7c4 2026-07-31 34: .flag(OptFlags::OptionsEverywhere);
3c858ed7c4 2026-07-31 35: let mut args = std::env::args();
3c858ed7c4 2026-07-31 36: args.next();
3c858ed7c4 2026-07-31 37: let parsed = specs.getopt(args);
3c858ed7c4 2026-07-31 38: for u in &parsed.unknown {
3c858ed7c4 2026-07-31 39: println!("Unknown option: {u}");
3c858ed7c4 2026-07-31 40: }
3c858ed7c4 2026-07-31 41: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
3c858ed7c4 2026-07-31 42: println!("SMTP2TG v{}, (C) 2024 - 2026\n\n\
3c858ed7c4 2026-07-31 43: \t-h|--help\tDisplay this help\n\
3c858ed7c4 2026-07-31 44: \t-c|--config …\tSet configuration file location.",
3c858ed7c4 2026-07-31 45: env!("CARGO_PKG_VERSION"));
3c858ed7c4 2026-07-31 46: return Ok(());
3c858ed7c4 2026-07-31 47: };
3c858ed7c4 2026-07-31 48: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
3c858ed7c4 2026-07-31 49: &path[..]
3c858ed7c4 2026-07-31 50: } else {
3c858ed7c4 2026-07-31 51: "smtp2tg.toml"
3c858ed7c4 2026-07-31 52: });
3c858ed7c4 2026-07-31 53: if !config_file.exists() {
3c858ed7c4 2026-07-31 54: bail!("can't read configuration from {config_file:?}");
3c858ed7c4 2026-07-31 55: };
3c858ed7c4 2026-07-31 56: {
3c858ed7c4 2026-07-31 57: let meta = metadata(config_file).await.stack()?;
3c858ed7c4 2026-07-31 58: if (!0o100600 & meta.permissions().mode()) > 0 {
3c858ed7c4 2026-07-31 59: bail!("other users can read or write config file {config_file:?}\n\
3c858ed7c4 2026-07-31 60: File permissions: {:o}", meta.permissions().mode());
3c858ed7c4 2026-07-31 61: }
3c858ed7c4 2026-07-31 62: }
3c858ed7c4 2026-07-31 63: let settings: config::Config = config::Config::builder()
3c858ed7c4 2026-07-31 64: .set_default("api_gateway", "https://api.telegram.org").stack()?
3c858ed7c4 2026-07-31 65: .set_default("fields", vec!["date", "from", "subject"]).stack()?
3c858ed7c4 2026-07-31 66: .set_default("hostname", "smtp.2.tg").stack()?
3c858ed7c4 2026-07-31 67: .set_default("listen_on", "0.0.0.0:1025").stack()?
3c858ed7c4 2026-07-31 68: .set_default("unknown", "relay").stack()?
3c858ed7c4 2026-07-31 69: .set_default("domains", vec!["localhost", hostname::get().stack()?.to_str().expect("Failed to get current hostname")]).stack()?
3c858ed7c4 2026-07-31 70: .add_source(config::File::from(config_file))
3c858ed7c4 2026-07-31 71: .build()
3c858ed7c4 2026-07-31 72: .with_context(|| format!("[{config_file:?}] there was an error reading config\n\
3c858ed7c4 2026-07-31 73: \tplease consult \"smtp2tg.toml.example\" for details"))?;
3c858ed7c4 2026-07-31 74:
3c858ed7c4 2026-07-31 75: let listen_on = settings.get_string("listen_on").stack()?;
3c858ed7c4 2026-07-31 76: let server_name = settings.get_string("hostname").stack()?;
3c858ed7c4 2026-07-31 77: let core = MailServer::new(settings)?;
3c858ed7c4 2026-07-31 78: let mut server = mailin_embedded::Server::new(core);
3c858ed7c4 2026-07-31 79:
3c858ed7c4 2026-07-31 80: server.with_name(server_name)
3c858ed7c4 2026-07-31 81: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
3c858ed7c4 2026-07-31 82: .with_addr(listen_on).unwrap();
3c858ed7c4 2026-07-31 83: server.serve().unwrap();
3c858ed7c4 2026-07-31 84:
3c858ed7c4 2026-07-31 85: Ok(())
3c858ed7c4 2026-07-31 86: }