266 lines
8.8 KiB
Rust
266 lines
8.8 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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// Based on original work by David Levy https://raw.githubusercontent.com/dlevy47/rust-interfaces
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use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
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use std::io;
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use igd::{PortMappingProtocol, search_gateway_from_timeout};
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use std::time::Duration;
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use node_table::{NodeEndpoint};
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/// Socket address extension for rustc beta. To be replaces with now unstable API
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pub trait SocketAddrExt {
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/// Returns true for the special 'unspecified' address 0.0.0.0.
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fn is_unspecified_s(&self) -> bool;
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/// Returns true if the address appears to be globally routable.
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fn is_global_s(&self) -> bool;
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}
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impl SocketAddrExt for Ipv4Addr {
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fn is_unspecified_s(&self) -> bool {
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self.octets() == [0, 0, 0, 0]
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}
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fn is_global_s(&self) -> bool {
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!self.is_private() && !self.is_loopback() && !self.is_link_local() &&
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!self.is_broadcast() && !self.is_documentation()
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}
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}
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impl SocketAddrExt for Ipv6Addr {
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fn is_unspecified_s(&self) -> bool {
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self.segments() == [0, 0, 0, 0, 0, 0, 0, 0]
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}
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fn is_global_s(&self) -> bool {
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if self.is_multicast() {
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self.segments()[0] & 0x000f == 14
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} else {
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!self.is_loopback() && !((self.segments()[0] & 0xffc0) == 0xfe80) &&
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!((self.segments()[0] & 0xffc0) == 0xfec0) && !((self.segments()[0] & 0xfe00) == 0xfc00)
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}
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}
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}
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#[cfg(not(windows))]
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mod getinterfaces {
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use std::{mem, io, ptr};
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use libc::{AF_INET, AF_INET6};
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use libc::{getifaddrs, freeifaddrs, ifaddrs, sockaddr, sockaddr_in, sockaddr_in6};
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use std::net::{Ipv4Addr, Ipv6Addr, IpAddr};
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fn convert_sockaddr (sa: *mut sockaddr) -> Option<IpAddr> {
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if sa == ptr::null_mut() { return None; }
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let (addr, _) = match unsafe { *sa }.sa_family as i32 {
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AF_INET => {
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let sa: *const sockaddr_in = unsafe { mem::transmute(sa) };
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let sa = & unsafe { *sa };
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let (addr, port) = (sa.sin_addr.s_addr, sa.sin_port);
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(IpAddr::V4(Ipv4Addr::new(
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(addr & 0x000000FF) as u8,
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((addr & 0x0000FF00) >> 8) as u8,
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((addr & 0x00FF0000) >> 16) as u8,
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((addr & 0xFF000000) >> 24) as u8)),
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port)
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},
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AF_INET6 => {
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let sa: *const sockaddr_in6 = unsafe { mem::transmute(sa) };
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let sa = & unsafe { *sa };
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let (addr, port) = (sa.sin6_addr.s6_addr, sa.sin6_port);
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let addr: [u16; 8] = unsafe { mem::transmute(addr) };
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(IpAddr::V6(Ipv6Addr::new(
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addr[0],
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addr[1],
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addr[2],
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addr[3],
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addr[4],
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addr[5],
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addr[6],
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addr[7])),
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port)
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},
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_ => return None,
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};
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Some(addr)
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}
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fn convert_ifaddrs (ifa: *mut ifaddrs) -> Option<IpAddr> {
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let ifa = unsafe { &mut *ifa };
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convert_sockaddr(ifa.ifa_addr)
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}
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pub fn get_all() -> io::Result<Vec<IpAddr>> {
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let mut ifap: *mut ifaddrs = unsafe { mem::zeroed() };
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if unsafe { getifaddrs(&mut ifap as *mut _) } != 0 {
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return Err(io::Error::last_os_error());
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}
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let mut ret = Vec::new();
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let mut cur: *mut ifaddrs = ifap;
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while cur != ptr::null_mut() {
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if let Some(ip_addr) = convert_ifaddrs(cur) {
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ret.push(ip_addr);
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}
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//TODO: do something else maybe?
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cur = unsafe { (*cur).ifa_next };
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}
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unsafe { freeifaddrs(ifap) };
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Ok(ret)
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}
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}
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#[cfg(not(windows))]
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fn get_if_addrs() -> io::Result<Vec<IpAddr>> {
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getinterfaces::get_all()
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}
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#[cfg(windows)]
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fn get_if_addrs() -> io::Result<Vec<IpAddr>> {
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Ok(Vec::new())
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}
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/// Select the best available public address
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pub fn select_public_address(port: u16) -> SocketAddr {
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match get_if_addrs() {
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Ok(list) => {
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//prefer IPV4 bindings
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for addr in &list { //TODO: use better criteria than just the first in the list
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match *addr {
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IpAddr::V4(a) if !a.is_unspecified_s() && !a.is_loopback() && !a.is_link_local() => {
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return SocketAddr::V4(SocketAddrV4::new(a, port));
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},
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_ => {},
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}
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}
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for addr in list {
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match addr {
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IpAddr::V6(a) if !a.is_unspecified_s() && !a.is_loopback() => {
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return SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0));
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},
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_ => {},
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}
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}
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},
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Err(e) => debug!("Error listing public interfaces: {:?}", e)
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}
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SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), port))
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}
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pub fn map_external_address(local: &NodeEndpoint) -> Option<NodeEndpoint> {
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if let SocketAddr::V4(ref local_addr) = local.address {
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match search_gateway_from_timeout(local_addr.ip().clone(), Duration::new(5, 0)) {
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Err(ref err) => debug!("Gateway search error: {}", err),
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Ok(gateway) => {
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match gateway.get_external_ip() {
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Err(ref err) => {
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debug!("IP request error: {}", err);
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},
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Ok(external_addr) => {
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match gateway.add_any_port(PortMappingProtocol::TCP, SocketAddrV4::new(local_addr.ip().clone(), local_addr.port()), 0, "Parity Node/TCP") {
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Err(ref err) => {
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debug!("Port mapping error: {}", err);
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},
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Ok(tcp_port) => {
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match gateway.add_any_port(PortMappingProtocol::UDP, SocketAddrV4::new(local_addr.ip().clone(), local.udp_port), 0, "Parity Node/UDP") {
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Err(ref err) => {
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debug!("Port mapping error: {}", err);
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},
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Ok(udp_port) => {
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return Some(NodeEndpoint { address: SocketAddr::V4(SocketAddrV4::new(external_addr, tcp_port)), udp_port: udp_port });
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},
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}
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},
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}
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},
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}
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},
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}
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}
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None
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}
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#[test]
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fn can_select_public_address() {
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let pub_address = select_public_address(40477);
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assert!(pub_address.port() == 40477);
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}
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#[ignore]
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#[test]
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fn can_map_external_address_or_fail() {
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let pub_address = select_public_address(40478);
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let _ = map_external_address(&NodeEndpoint { address: pub_address, udp_port: 40478 });
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}
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#[test]
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fn ipv4_properties() {
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#![cfg_attr(feature="dev", allow(too_many_arguments))]
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fn check(octets: &[u8; 4], unspec: bool, loopback: bool,
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private: bool, link_local: bool, global: bool,
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multicast: bool, broadcast: bool, documentation: bool) {
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let ip = Ipv4Addr::new(octets[0], octets[1], octets[2], octets[3]);
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assert_eq!(octets, &ip.octets());
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assert_eq!(ip.is_unspecified_s(), unspec);
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assert_eq!(ip.is_loopback(), loopback);
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assert_eq!(ip.is_private(), private);
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assert_eq!(ip.is_link_local(), link_local);
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assert_eq!(ip.is_global_s(), global);
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assert_eq!(ip.is_multicast(), multicast);
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assert_eq!(ip.is_broadcast(), broadcast);
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assert_eq!(ip.is_documentation(), documentation);
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}
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// address unspec loopbk privt linloc global multicast brdcast doc
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check(&[0, 0, 0, 0], true, false, false, false, true, false, false, false);
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check(&[0, 0, 0, 1], false, false, false, false, true, false, false, false);
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check(&[1, 0, 0, 0], false, false, false, false, true, false, false, false);
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check(&[10, 9, 8, 7], false, false, true, false, false, false, false, false);
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check(&[127, 1, 2, 3], false, true, false, false, false, false, false, false);
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check(&[172, 31, 254, 253], false, false, true, false, false, false, false, false);
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check(&[169, 254, 253, 242], false, false, false, true, false, false, false, false);
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check(&[192, 0, 2, 183], false, false, false, false, false, false, false, true);
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check(&[192, 1, 2, 183], false, false, false, false, true, false, false, false);
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check(&[192, 168, 254, 253], false, false, true, false, false, false, false, false);
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check(&[198, 51, 100, 0], false, false, false, false, false, false, false, true);
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check(&[203, 0, 113, 0], false, false, false, false, false, false, false, true);
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check(&[203, 2, 113, 0], false, false, false, false, true, false, false, false);
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check(&[224, 0, 0, 0], false, false, false, false, true, true, false, false);
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check(&[239, 255, 255, 255], false, false, false, false, true, true, false, false);
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check(&[255, 255, 255, 255], false, false, false, false, false, false, true, false);
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}
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#[test]
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fn ipv6_properties() {
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fn check(str_addr: &str, unspec: bool, loopback: bool, global: bool) {
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let ip: Ipv6Addr = str_addr.parse().unwrap();
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assert_eq!(str_addr, ip.to_string());
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assert_eq!(ip.is_unspecified_s(), unspec);
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assert_eq!(ip.is_loopback(), loopback);
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assert_eq!(ip.is_global_s(), global);
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}
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// unspec loopbk global
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check("::", true, false, true);
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check("::1", false, true, false);
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}
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