allow use ipv4 address in any cidr (#404)

easytier/src/proto/cli.proto

@@ -45,7 +45,7 @@ message ListPeerResponse {
 
 message Route {
   uint32 peer_id = 1;
-  string ipv4_addr = 2;
+  common.Ipv4Inet ipv4_addr = 2;
   uint32 next_hop_peer_id = 3;
   int32 cost = 4;
   repeated string proxy_cidrs = 5;

easytier/src/proto/common.proto

@@ -72,6 +72,11 @@ message Ipv6Addr {
   uint32 part4 = 4;
 }
 
+message Ipv4Inet {
+  Ipv4Addr address = 1;
+  uint32 network_length = 2;
+}
+
 message Url { string url = 1; }
 
 message SocketAddr {

easytier/src/proto/common.rs

@@ -1,5 +1,7 @@
 use std::{fmt::Display, str::FromStr};
 
+use anyhow::Context;
+
 include!(concat!(env!("OUT_DIR"), "/common.rs"));
 
 impl From<uuid::Uuid> for Uuid {
@@ -60,10 +62,8 @@ impl From<Ipv6Addr> for std::net::Ipv6Addr {
         let part3 = value.part3.to_be_bytes();
         let part4 = value.part4.to_be_bytes();
         std::net::Ipv6Addr::from([
-            part1[0], part1[1], part1[2], part1[3], 
-            part2[0], part2[1], part2[2], part2[3], 
-            part3[0], part3[1], part3[2], part3[3], 
-            part4[0], part4[1], part4[2], part4[3]
+            part1[0], part1[1], part1[2], part1[3], part2[0], part2[1], part2[2], part2[3],
+            part3[0], part3[1], part3[2], part3[3], part4[0], part4[1], part4[2], part4[3],
         ])
     }
 }
@@ -74,6 +74,37 @@ impl ToString for Ipv6Addr {
     }
 }
 
+impl From<cidr::Ipv4Inet> for Ipv4Inet {
+    fn from(value: cidr::Ipv4Inet) -> Self {
+        Ipv4Inet {
+            address: Some(value.address().into()),
+            network_length: value.network_length() as u32,
+        }
+    }
+}
+
+impl From<Ipv4Inet> for cidr::Ipv4Inet {
+    fn from(value: Ipv4Inet) -> Self {
+        cidr::Ipv4Inet::new(value.address.unwrap().into(), value.network_length as u8).unwrap()
+    }
+}
+
+impl std::fmt::Display for Ipv4Inet {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", cidr::Ipv4Inet::from(self.clone()))
+    }
+}
+
+impl FromStr for Ipv4Inet {
+    type Err = anyhow::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(Ipv4Inet::from(
+            cidr::Ipv4Inet::from_str(s).with_context(|| "Failed to parse Ipv4Inet")?,
+        ))
+    }
+}
+
 impl From<url::Url> for Url {
     fn from(value: url::Url) -> Self {
         Url {

easytier/src/proto/peer_rpc.proto

@@ -20,6 +20,8 @@ message RoutePeerInfo {
   string easytier_version = 10;
   common.PeerFeatureFlag feature_flag = 11;
   uint64 peer_route_id = 12;
+
+  uint32 network_length = 13;
 }
 
 message PeerIdVersion {