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:
f5ed284f8c 2025-06-21 14: use anyhow::{
f5ed284f8c 2025-06-21 15: bail,
f5ed284f8c 2025-06-21 16: Context,
f5ed284f8c 2025-06-21 17: Result,
f5ed284f8c 2025-06-21 18: };
1db9dbe390 2024-11-28 19: use async_std::{
cfe321bd6f 2025-01-23 20: fs::metadata,
e66352b9cc 2025-01-21 21: };
e66352b9cc 2025-01-21 22: use just_getopt::{
e66352b9cc 2025-01-21 23: OptFlags,
e66352b9cc 2025-01-21 24: OptSpecs,
6887d3b7f9 2025-06-05 25: OptValue,
6887d3b7f9 2025-06-05 26: };
7620f854a7 2024-05-21 27:
7620f854a7 2024-05-21 28: use std::{
d96b1b4710 2025-06-11 29: io::Cursor,
65b2967a92 2025-01-25 30: os::unix::fs::PermissionsExt,
65b2967a92 2025-01-25 31: path::Path,
f5ed284f8c 2025-06-21 32: };
65b2967a92 2025-01-25 33:
65b2967a92 2025-01-25 34: #[async_std::main]
65b2967a92 2025-01-25 35: async fn main () -> Result<()> {
65b2967a92 2025-01-25 36: let specs = OptSpecs::new()
6887d3b7f9 2025-06-05 37: .option("help", "h", OptValue::None)
6887d3b7f9 2025-06-05 38: .option("help", "help", OptValue::None)
6887d3b7f9 2025-06-05 39: .option("config", "c", OptValue::Required)
6887d3b7f9 2025-06-05 40: .option("config", "config", OptValue::Required)
e66352b9cc 2025-01-21 41: .flag(OptFlags::OptionsEverywhere);
e66352b9cc 2025-01-21 42: let mut args = std::env::args();
e66352b9cc 2025-01-21 43: args.next();
e66352b9cc 2025-01-21 44: let parsed = specs.getopt(args);
e66352b9cc 2025-01-21 45: for u in &parsed.unknown {
c808d500e6 2025-03-09 46: println!("Unknown option: {u}");
e66352b9cc 2025-01-21 47: }
e66352b9cc 2025-01-21 48: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
e66352b9cc 2025-01-21 49: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
e66352b9cc 2025-01-21 50: \t-h|--help\tDisplay this help\n\
f5ed284f8c 2025-06-21 51: \t-c|--config …\tSet configuration file location.",
e66352b9cc 2025-01-21 52: env!("CARGO_PKG_VERSION"));
e66352b9cc 2025-01-21 53: return Ok(());
e66352b9cc 2025-01-21 54: };
e66352b9cc 2025-01-21 55: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
e66352b9cc 2025-01-21 56: &path[..]
e66352b9cc 2025-01-21 57: } else {
e66352b9cc 2025-01-21 58: "smtp2tg.toml"
e66352b9cc 2025-01-21 59: });
e66352b9cc 2025-01-21 60: if !config_file.exists() {
f5ed284f8c 2025-06-21 61: bail!("can't read configuration from {config_file:?}");
e66352b9cc 2025-01-21 62: };
cfe321bd6f 2025-01-23 63: {
cfe321bd6f 2025-01-23 64: let meta = metadata(config_file).await?;
cfe321bd6f 2025-01-23 65: if (!0o100600 & meta.permissions().mode()) > 0 {
f5ed284f8c 2025-06-21 66: bail!("other users can read or write config file {config_file:?}\n\
c808d500e6 2025-03-09 67: File permissions: {:o}", meta.permissions().mode());
cfe321bd6f 2025-01-23 68: }
cfe321bd6f 2025-01-23 69: }
28fde40f7a 2024-12-27 70: let settings: config::Config = config::Config::builder()
28fde40f7a 2024-12-27 71: .set_default("fields", vec!["date", "from", "subject"]).unwrap()
28fde40f7a 2024-12-27 72: .set_default("hostname", "smtp.2.tg").unwrap()
28fde40f7a 2024-12-27 73: .set_default("listen_on", "0.0.0.0:1025").unwrap()
28fde40f7a 2024-12-27 74: .set_default("unknown", "relay").unwrap()
2158b44929 2025-06-12 75: .set_default("domains", vec!["localhost", hostname::get()?.to_str().expect("Failed to get current hostname")]).unwrap()
e66352b9cc 2025-01-21 76: .add_source(config::File::from(config_file))
28fde40f7a 2024-12-27 77: .build()
f5ed284f8c 2025-06-21 78: .with_context(|| format!("[{config_file:?}] there was an error reading config\n\
f5ed284f8c 2025-06-21 79: \tplease consult \"smtp2tg.toml.example\" for details"))?;
1db9dbe390 2024-11-28 80:
1db9dbe390 2024-11-28 81: let listen_on = settings.get_string("listen_on")?;
1db9dbe390 2024-11-28 82: let server_name = settings.get_string("hostname")?;
f5ed284f8c 2025-06-21 83: let core = MailServer::new(settings)?;
1db9dbe390 2024-11-28 84: let mut server = mailin_embedded::Server::new(core);
1db9dbe390 2024-11-28 85:
1db9dbe390 2024-11-28 86: server.with_name(server_name)
1db9dbe390 2024-11-28 87: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
1db9dbe390 2024-11-28 88: .with_addr(listen_on).unwrap();
1db9dbe390 2024-11-28 89: server.serve().unwrap();
1db9dbe390 2024-11-28 90:
1db9dbe390 2024-11-28 91: Ok(())
7620f854a7 2024-05-21 92: }