apply nat to modem traffic

2 files changed, 12 insertions, 2 deletions

diff --git a/src/error.rs b/src/error.rs
index b525e47..3431850 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -4,6 +4,8 @@ use thiserror::Error;
 pub enum Error {
     #[error("parse ip address: {0}")]
     AddrParse(#[from] std::net::AddrParseError),
+    #[error("ipnetwork: {0}")]
+    IpNetwork(#[from] ipnetwork::IpNetworkError),
     #[error("rustables builder: {0}")]
     RustablesBuilder(#[from] rustables::error::BuilderError),
     #[error("rustables query: {0}")]
diff --git a/src/main.rs b/src/main.rs
index 4d604af..1d91419 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,10 @@
 use rsdsl_netfilterd::error::Result;
 
+use std::net::Ipv4Addr;
 use std::thread;
 use std::time::Duration;
 
+use ipnetwork::Ipv4Network;
 use rustables::{
     Batch, Chain, ChainPolicy, ChainType, Hook, HookClass, MsgType, Protocol, ProtocolFamily, Rule,
     Table,
@@ -26,8 +28,14 @@ fn nat() -> Result<()> {
 
     batch.add(&postrouting, MsgType::Add);
 
-    let rule = Rule::new(&postrouting)?.oface("ppp0")?.masquerade();
-    batch.add(&rule, MsgType::Add);
+    let masq_outbound_modem = Rule::new(&postrouting)?
+        .oface("eth1")?
+        .dnetwork(Ipv4Network::new(Ipv4Addr::new(192, 168, 1, 0), 24)?.into())?
+        .masquerade();
+    batch.add(&masq_outbound_modem, MsgType::Add);
+
+    let masq_outbound_wan = Rule::new(&postrouting)?.oface("ppp0")?.masquerade();
+    batch.add(&masq_outbound_wan, MsgType::Add);
 
     // +------------------+
     // | PREROUTING chain |