1db9dbe390 2024-11-28 1: //! Simple SMTP-to-Telegram gateway. Can parse email and send them as telegram
1db9dbe390 2024-11-28 2: //! messages to specified chats, generally you specify which email address is
1db9dbe390 2024-11-28 3: //! available in configuration, everything else is sent to default address.
1db9dbe390 2024-11-28 4:
f5ed284f8c 2025-06-21 5: mod mail;
f5ed284f8c 2025-06-21 6: mod telegram;
f5ed284f8c 2025-06-21 7: mod utils;
f5ed284f8c 2025-06-21 8:
f5ed284f8c 2025-06-21 9: #[cfg(test)]
f5ed284f8c 2025-06-21 10: mod tests;
f5ed284f8c 2025-06-21 11:
f5ed284f8c 2025-06-21 12: use crate::mail::MailServer;
f5ed284f8c 2025-06-21 13:
072229b5bf 2026-01-01 14: use smol::fs::metadata;
e66352b9cc 2025-01-21 15: use just_getopt::{
e66352b9cc 2025-01-21 16: OptFlags,
e66352b9cc 2025-01-21 17: OptSpecs,
6887d3b7f9 2025-06-05 18: OptValue,
a044f68fa7 2025-08-23 19: };
a044f68fa7 2025-08-23 20: use stacked_errors::{
a044f68fa7 2025-08-23 21: Result,
a044f68fa7 2025-08-23 22: StackableErr,
a044f68fa7 2025-08-23 23: bail,
f5ed284f8c 2025-06-21 24: };
f5ed284f8c 2025-06-21 25:
f5ed284f8c 2025-06-21 26: use std::{
d96b1b4710 2025-06-11 27: io::Cursor,
d96b1b4710 2025-06-11 28: os::unix::fs::PermissionsExt,
d96b1b4710 2025-06-11 29: path::Path,
f5ed284f8c 2025-06-21 30: };
f5ed284f8c 2025-06-21 31:
072229b5bf 2026-01-01 32: fn main () -> Result<()> {
072229b5bf 2026-01-01 33: smol::block_on(async {
072229b5bf 2026-01-01 34: let specs = OptSpecs::new()
072229b5bf 2026-01-01 35: .option("help", "h", OptValue::None)
072229b5bf 2026-01-01 36: .option("help", "help", OptValue::None)
072229b5bf 2026-01-01 37: .option("config", "c", OptValue::Required)
072229b5bf 2026-01-01 38: .option("config", "config", OptValue::Required)
072229b5bf 2026-01-01 39: .flag(OptFlags::OptionsEverywhere);
072229b5bf 2026-01-01 40: let mut args = std::env::args();
072229b5bf 2026-01-01 41: args.next();
072229b5bf 2026-01-01 42: let parsed = specs.getopt(args);
072229b5bf 2026-01-01 43: for u in &parsed.unknown {
072229b5bf 2026-01-01 44: println!("Unknown option: {u}");
072229b5bf 2026-01-01 45: }
072229b5bf 2026-01-01 46: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
072229b5bf 2026-01-01 47: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
072229b5bf 2026-01-01 48: \t-h|--help\tDisplay this help\n\
072229b5bf 2026-01-01 49: \t-c|--config …\tSet configuration file location.",
072229b5bf 2026-01-01 50: env!("CARGO_PKG_VERSION"));
072229b5bf 2026-01-01 51: return Ok(());
072229b5bf 2026-01-01 52: };
072229b5bf 2026-01-01 53: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
072229b5bf 2026-01-01 54: &path[..]
072229b5bf 2026-01-01 55: } else {
072229b5bf 2026-01-01 56: "smtp2tg.toml"
072229b5bf 2026-01-01 57: });
072229b5bf 2026-01-01 58: if !config_file.exists() {
072229b5bf 2026-01-01 59: bail!("can't read configuration from {config_file:?}");
072229b5bf 2026-01-01 60: };
072229b5bf 2026-01-01 61: {
072229b5bf 2026-01-01 62: let meta = metadata(config_file).await.stack()?;
072229b5bf 2026-01-01 63: if (!0o100600 & meta.permissions().mode()) > 0 {
072229b5bf 2026-01-01 64: bail!("other users can read or write config file {config_file:?}\n\
072229b5bf 2026-01-01 65: File permissions: {:o}", meta.permissions().mode());
072229b5bf 2026-01-01 66: }
072229b5bf 2026-01-01 67: }
072229b5bf 2026-01-01 68: let settings: config::Config = config::Config::builder()
072229b5bf 2026-01-01 69: .set_default("fields", vec!["date", "from", "subject"]).stack()?
072229b5bf 2026-01-01 70: .set_default("hostname", "smtp.2.tg").stack()?
072229b5bf 2026-01-01 71: .set_default("listen_on", "0.0.0.0:1025").stack()?
072229b5bf 2026-01-01 72: .set_default("unknown", "relay").stack()?
072229b5bf 2026-01-01 73: .set_default("domains", vec!["localhost", hostname::get().stack()?.to_str().expect("Failed to get current hostname")]).stack()?
072229b5bf 2026-01-01 74: .add_source(config::File::from(config_file))
072229b5bf 2026-01-01 75: .build()
072229b5bf 2026-01-01 76: .with_context(|| format!("[{config_file:?}] there was an error reading config\n\
072229b5bf 2026-01-01 77: \tplease consult \"smtp2tg.toml.example\" for details"))?;
072229b5bf 2026-01-01 78:
072229b5bf 2026-01-01 79: let listen_on = settings.get_string("listen_on").stack()?;
072229b5bf 2026-01-01 80: let server_name = settings.get_string("hostname").stack()?;
072229b5bf 2026-01-01 81: let core = MailServer::new(settings)?;
072229b5bf 2026-01-01 82: let mut server = mailin_embedded::Server::new(core);
072229b5bf 2026-01-01 83:
072229b5bf 2026-01-01 84: server.with_name(server_name)
072229b5bf 2026-01-01 85: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
072229b5bf 2026-01-01 86: .with_addr(listen_on).unwrap();
072229b5bf 2026-01-01 87: server.serve().unwrap();
072229b5bf 2026-01-01 88:
072229b5bf 2026-01-01 89: Ok(())
072229b5bf 2026-01-01 90: })
7620f854a7 2024-05-21 91: }