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extern crate libc; #[macro_use] extern crate lazy_static; #[macro_use] extern crate libnss; extern crate debug_print; use libnss::host::{AddressFamily, Addresses, Host, HostHooks}; use libnss::interop::Response; use rusqlite::{params, Connection, Error, OpenFlags, Result}; use debug_print::debug_eprintln; use std::net::{IpAddr, Ipv4Addr}; static DBPATH: &'static str = "/var/lib/wiregarden/db"; fn dbflags() -> OpenFlags { OpenFlags::SQLITE_OPEN_READ_ONLY | OpenFlags::SQLITE_OPEN_NOFOLLOW | OpenFlags::SQLITE_OPEN_PRIVATE_CACHE | OpenFlags::SQLITE_OPEN_FULL_MUTEX } struct WiregardenHost; libnss_host_hooks!(wiregarden, WiregardenHost); impl HostHooks for WiregardenHost { fn get_all_entries() -> Response<Vec<Host>> { match get_all_entries() { Ok(hosts) => { if hosts.is_empty() { Response::NotFound } else { Response::Success(hosts) } } Err(Error::QueryReturnedNoRows) => Response::NotFound, Err(_e) => { debug_eprintln!("get_all_entries failed: {}", _e); Response::Unavail } } } fn get_host_by_addr(addr: IpAddr) -> Response<Host> { match get_host_by_addr(addr) { Ok(Some(host)) => Response::Success(host), Ok(None) => Response::NotFound, Err(Error::QueryReturnedNoRows) => Response::NotFound, Err(_e) => { debug_eprintln!("get_host_by_addr {} failed: {}", addr, _e); Response::Unavail } } } fn get_host_by_name(name: &str, family: AddressFamily) -> Response<Host> { if family != AddressFamily::IPv4 { Response::NotFound } else { match get_host_by_name(name) { Ok(Some(host)) => Response::Success(host), Ok(None) => Response::NotFound, Err(Error::QueryReturnedNoRows) => Response::NotFound, Err(_e) => { debug_eprintln!("get_host_by_name {} failed: {}", name, _e); Response::Unavail } } } } } fn get_all_entries() -> Result<Vec<Host>> { let mut hosts = vec![]; let db = Connection::open_with_flags(&DBPATH, dbflags())?; let mut stmt = db.prepare( " select device_name, net_name, device_addr from iface union select p.device_name, i.net_name, p.device_addr from iface i join peer p on (i.id = p.iface_id", )?; stmt.query_map(params![], |row| { let device_name: String = row.get(0)?; let net_name: String = row.get(1)?; let device_addr_s: String = row.get(2)?; let device_addr: std::result::Result<Ipv4Addr, _> = trim_subnet(&device_addr_s).parse(); match device_addr { Ok(v4addr) => { hosts.push(Host { name: format!("{}.{}", device_name, net_name), addresses: Addresses::V4(vec![v4addr]), aliases: vec![], }); } _ => {} }; Ok(()) })?; Ok(hosts) } fn get_host_by_addr(addr: IpAddr) -> Result<Option<Host>> { match addr { IpAddr::V4(v4addr) => { let db = Connection::open_with_flags(&DBPATH, dbflags())?; let addr_s = format!("{}", addr); let mut stmt = db.prepare( " select device_name, net_name from iface where device_addr like ? || '/%' union select p.device_name, i.net_name from iface i join peer p on (i.id = p.iface_id) where p.device_addr like ? || '/%'", )?; stmt.query_row(params![addr_s, addr_s], |row| { let device_name: String = row.get(0)?; let net_name: String = row.get(1)?; Ok(Some(Host { name: format!("{}.{}", device_name, net_name), addresses: Addresses::V4(vec![v4addr]), aliases: vec![], })) }) } _ => Ok(None), } } fn get_host_by_name(name: &str) -> Result<Option<Host>> { let db = Connection::open_with_flags(&DBPATH, dbflags())?; let mut stmt = db.prepare( " select device_name, net_name, device_addr from iface where device_name || '.' || net_name = ? union select p.device_name, i.net_name, p.device_addr from iface i join peer p on (i.id = p.iface_id) where p.device_name || '.' || i.net_name = ?", )?; stmt.query_row(params![name, name], |row| { let device_name: String = row.get(0)?; let net_name: String = row.get(1)?; let device_addr_s: String = row.get(2)?; let device_addr: std::result::Result<Ipv4Addr, _> = trim_subnet(&device_addr_s).parse(); match device_addr { Ok(v4addr) => Ok(Some(Host { name: format!("{}.{}", device_name, net_name), addresses: Addresses::V4(vec![v4addr]), aliases: vec![], })), _ => Ok(None), } }) } fn trim_subnet(s: &str) -> &str { match s.rfind("/") { Some(ri) => &s[0..ri], None => s, } }