Docs update

src/common.rs

@@ -1,5 +1,6 @@
 use std::net::Ipv4Addr;
 
+/// Represents a bunch of errors that can occur while working with a `IpNetwork`
 #[derive(Debug,Clone,PartialEq,Eq)]
 pub enum IpNetworkError {
     InvalidAddr(String),

src/ipv4.rs

@@ -6,6 +6,7 @@ use common::{IpNetworkError, cidr_parts, parse_prefix, parse_addr};
 
 const IPV4_BITS: u8 = 32;
 
+/// Represents a network range where the IP addresses are of v4
 #[derive(Debug,Clone,Copy,Hash,PartialEq,Eq)]
 pub struct Ipv4Network {
     addr: Ipv4Addr,

src/ipv6.rs

@@ -8,6 +8,7 @@ use common::{IpNetworkError, cidr_parts, parse_prefix};
 const IPV6_BITS: u8 = 128;
 const IPV6_SEGMENT_BITS: u8 = 16;
 
+/// Represents a network range where the IP addresses are of v6
 #[derive(Debug,Clone,Copy,Hash,PartialEq,Eq)]
 pub struct Ipv6Network {
     addr: Ipv6Addr,

src/lib.rs

@@ -1,3 +1,6 @@
+//! The `ipnetwork` crate provides a set of APIs to work with IP CIDRs in
+//! Rust. Implementation for IPv4 is more or less stable, IPv6 implementation
+//! is still WIP.
 #![cfg_attr(feature = "dev", feature(plugin))]
 #![cfg_attr(feature = "dev", plugin(clippy))]
 #![crate_type = "lib"]
@@ -12,7 +15,8 @@ pub use ipv4::{Ipv4Network, ipv4_mask_to_prefix};
 pub use ipv6::{Ipv6Network, ipv6_mask_to_prefix};
 pub use common::IpNetworkError;
 
-// A network
+/// Represents a generic network range. This type can have two variants:
+/// the v4 and the v6 case.
 #[derive(Debug,Clone,Copy,Hash,PartialEq,Eq)]
 pub enum IpNetwork {
     V4(Ipv4Network),