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extern crate byteorder;
extern crate cid;
extern crate integer_encoding;
mod errors;
mod protocol;
pub use errors::{Error, Result};
pub use protocol::{AddrComponent, Protocol, ProtocolArgSize};
use std::fmt;
use std::iter::FromIterator;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
use std::str::FromStr;
#[derive(PartialEq, Eq, Clone, Hash)]
pub struct Multiaddr {
bytes: Vec<u8>,
}
impl fmt::Debug for Multiaddr {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.to_string().fmt(f)
}
}
impl fmt::Display for Multiaddr {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for s in self.iter() {
s.to_string().fmt(f)?;
}
Ok(())
}
}
impl Multiaddr {
#[inline]
pub fn into_bytes(self) -> Vec<u8> {
self.bytes
}
pub fn to_bytes(&self) -> Vec<u8> {
self.bytes.to_owned()
}
pub fn from_bytes(bytes: Vec<u8>) -> Result<Multiaddr> {
{
let mut ptr = &bytes[..];
while !ptr.is_empty() {
let (_, new_ptr) = AddrComponent::from_bytes(ptr)?;
ptr = new_ptr;
}
}
Ok(Multiaddr { bytes })
}
pub fn as_slice(&self) -> &[u8] {
&self.bytes
}
#[inline]
#[deprecated(note = "Use `self.iter().map(|addr| addr.protocol_id())` instead")]
pub fn protocol(&self) -> Vec<Protocol> {
self.iter().map(|addr| addr.protocol_id()).collect()
}
pub fn encapsulate<T: ToMultiaddr>(&self, input: T) -> Result<Multiaddr> {
let new = input.to_multiaddr()?;
let mut bytes = self.bytes.clone();
bytes.extend(new.to_bytes());
Ok(Multiaddr { bytes })
}
#[inline]
pub fn append(&mut self, component: AddrComponent) {
component
.write_bytes(&mut self.bytes)
.expect("writing to a Vec never fails")
}
pub fn decapsulate<T: ToMultiaddr>(&self, input: T) -> Result<Multiaddr> {
let input = input.to_multiaddr()?.to_bytes();
let bytes_len = self.bytes.len();
let input_length = input.len();
let mut input_pos = 0;
let mut matches = false;
for (i, _) in self.bytes.iter().enumerate() {
let next = i + input_length;
if next > bytes_len {
continue;
}
if &self.bytes[i..next] == input.as_slice() {
matches = true;
input_pos = i;
break;
}
}
if !matches {
return Ok(Multiaddr {
bytes: self.bytes.clone(),
});
}
let mut bytes = self.bytes.clone();
bytes.truncate(input_pos);
Ok(Multiaddr { bytes })
}
#[inline]
pub fn iter(&self) -> Iter {
Iter(&self.bytes)
}
pub fn pop(&mut self) -> Option<AddrComponent> {
let mut list = self.iter().collect::<Vec<_>>();
let last_elem = list.pop();
*self = list.into_iter().collect();
last_elem
}
}
impl From<AddrComponent> for Multiaddr {
fn from(addr: AddrComponent) -> Multiaddr {
let mut out = Vec::new();
addr.write_bytes(&mut out)
.expect("writing to a Vec never fails");
Multiaddr { bytes: out }
}
}
impl<'a> IntoIterator for &'a Multiaddr {
type Item = AddrComponent;
type IntoIter = Iter<'a>;
#[inline]
fn into_iter(self) -> Iter<'a> {
Iter(&self.bytes)
}
}
impl FromIterator<AddrComponent> for Multiaddr {
fn from_iter<T>(iter: T) -> Self
where
T: IntoIterator<Item = AddrComponent>,
{
let mut bytes = Vec::new();
for cmp in iter {
cmp.write_bytes(&mut bytes)
.expect("writing to a Vec never fails");
}
Multiaddr { bytes }
}
}
impl FromStr for Multiaddr {
type Err = Error;
#[inline]
fn from_str(input: &str) -> Result<Self> {
let mut bytes = Vec::new();
let mut parts = input.split('/');
if !parts.next().ok_or(Error::InvalidMultiaddr)?.is_empty() {
return Err(Error::InvalidMultiaddr);
}
while let Some(part) = parts.next() {
let protocol: Protocol = part.parse()?;
let addr_component = match protocol.size() {
ProtocolArgSize::Fixed { bytes: 0 } => {
protocol.parse_data("")?
}
_ => {
let data = parts.next().ok_or(Error::MissingAddress)?;
protocol.parse_data(data)?
}
};
addr_component
.write_bytes(&mut bytes)
.expect("writing to a Vec never fails");
}
Ok(Multiaddr { bytes })
}
}
pub struct Iter<'a>(&'a [u8]);
impl<'a> Iterator for Iter<'a> {
type Item = AddrComponent;
fn next(&mut self) -> Option<AddrComponent> {
if self.0.is_empty() {
return None;
}
let (component, next_data) =
AddrComponent::from_bytes(self.0).expect("multiaddr is known to be valid");
self.0 = next_data;
Some(component)
}
}
pub trait ToMultiaddr {
fn to_multiaddr(&self) -> Result<Multiaddr>;
}
impl ToMultiaddr for SocketAddr {
fn to_multiaddr(&self) -> Result<Multiaddr> {
match *self {
SocketAddr::V4(ref a) => (*a).to_multiaddr(),
SocketAddr::V6(ref a) => (*a).to_multiaddr(),
}
}
}
impl ToMultiaddr for SocketAddrV4 {
fn to_multiaddr(&self) -> Result<Multiaddr> {
format!("/ip4/{}/tcp/{}", self.ip(), self.port()).parse()
}
}
impl ToMultiaddr for SocketAddrV6 {
fn to_multiaddr(&self) -> Result<Multiaddr> {
format!("/ip6/{}/tcp/{}", self.ip(), self.port()).parse()
}
}
impl ToMultiaddr for IpAddr {
fn to_multiaddr(&self) -> Result<Multiaddr> {
match *self {
IpAddr::V4(ref a) => (*a).to_multiaddr(),
IpAddr::V6(ref a) => (*a).to_multiaddr(),
}
}
}
impl ToMultiaddr for Ipv4Addr {
fn to_multiaddr(&self) -> Result<Multiaddr> {
format!("/ip4/{}", &self).parse()
}
}
impl ToMultiaddr for Ipv6Addr {
fn to_multiaddr(&self) -> Result<Multiaddr> {
format!("/ip6/{}", &self).parse()
}
}
impl ToMultiaddr for String {
fn to_multiaddr(&self) -> Result<Multiaddr> {
self.parse()
}
}
impl<'a> ToMultiaddr for &'a str {
fn to_multiaddr(&self) -> Result<Multiaddr> {
self.parse()
}
}
impl ToMultiaddr for Multiaddr {
fn to_multiaddr(&self) -> Result<Multiaddr> {
Ok(self.clone())
}
}