diff options
Diffstat (limited to 'src/lib.rs')
| -rw-r--r-- | src/lib.rs | 21 |
1 files changed, 17 insertions, 4 deletions
@@ -11,6 +11,7 @@ use socket2::{Domain, Socket, Type}; pub enum Error { IoError(std::io::Error), WrongIpVer(String, IpAddr), + NoUla(Ipv6Addr), NoGua(Ipv6Addr), } @@ -25,6 +26,7 @@ impl fmt::Display for Error { Self::WrongIpVer(want, got) => { write!(fmt, "wrong ip version: expected {}, got {}", want, got) } + Self::NoUla(ip) => write!(fmt, "ipv6 address {} is not a ula", ip), Self::NoGua(ip) => write!(fmt, "ipv6 address {} is not a gua", ip), } } @@ -39,9 +41,9 @@ impl From<std::io::Error> for Error { /// An alias for `std::result::Result` that uses `Error` as its error variant. pub type Result<T> = std::result::Result<T, Error>; -fn get_ipv6(interface: &str) -> Result<Ipv6Addr> { +fn get_ipv6(interface: &str, network: &str) -> Result<Ipv6Addr> { let socket = Socket::new(Domain::IPV6, Type::DGRAM, None)?; - let sock_addr = ("2000::", 0).to_socket_addrs()?.next().unwrap(); + let sock_addr = (network, 0).to_socket_addrs()?.next().unwrap(); socket.bind_device(Some(interface.as_bytes()))?; socket.connect(&sock_addr.into())?; @@ -55,9 +57,20 @@ fn get_ipv6(interface: &str) -> Result<Ipv6Addr> { } } +/// Get the preferred outgoing IPv6 ULA of the given interface. +pub fn get_ipv6_unique_local(interface: &str) -> Result<Ipv6Addr> { + let ipv6 = get_ipv6(interface, "fc00::")?; + + if ipv6.is_unique_local() { + Ok(ipv6) + } else { + Err(Error::NoUla(ipv6)) + } +} + /// Get the preferred outgoing IPv6 GUA of the given interface. -pub fn get_ipv6_global(interface: &str) -> Result<Ipv6Addr> { - let ipv6 = get_ipv6(interface)?; +pub fn get_ipv6_unicast_global(interface: &str) -> Result<Ipv6Addr> { + let ipv6 = get_ipv6(interface, "2000::")?; if ipv6.is_unicast_global() { Ok(ipv6) |