chore: get netgen bin setup ready for cli handling

Introduce clap to netgen for CLI args handling
add default configs for plugins
add startup config for holo

Signed-off-by: Paul Wekesa <paul1tw1@gmail.com>

Cargo.toml

@@ -17,3 +17,4 @@ libc = "0.2.164"
 enum-as-inner = "0.6.1"
 ipnetwork = "0.20.0"
 rand = "0.8.5"
+clap = {version="4.5.23", features = ["default", "cargo"]}

assets/rt1.conf

@@ -0,0 +1,19 @@
+!
+interfaces interface eth-sw1 
+ type iana-if-type:ethernetCsmacd
+ !
+ ipv4 vrrp vrrp-instance 1 
+  log-state-change true
+  preempt enabled false 
+  advertise-interval-sec 1
+  priority 10
+  !
+  virtual-ipv4-addresses virtual-ipv4-address 10.0.1.5
+!
+interfaces interface lo
+ type iana-if-type:softwareLoopback
+ ipv4
+ !
+ ipv4 address 1.1.1.1 
+  prefix-length 32
+!

assets/rt2.conf

@@ -0,0 +1,19 @@
+!
+interfaces interface eth-sw1 
+ type iana-if-type:ethernetCsmacd
+ !
+ ipv4 vrrp vrrp-instance 1 
+  log-state-change true
+  preempt enabled false 
+  advertise-interval-sec 1
+  priority 20
+  !
+  virtual-ipv4-addresses virtual-ipv4-address 10.0.1.5
+!
+interfaces interface lo
+ type iana-if-type:softwareLoopback
+ ipv4
+ !
+ ipv4 address 2.2.2.2 
+  prefix-length 32
+!

assets/rt3.conf

@@ -0,0 +1,19 @@
+!
+interfaces interface eth-sw1 
+ type iana-if-type:ethernetCsmacd
+ !
+ ipv4 vrrp vrrp-instance 1 
+  log-state-change true
+  preempt enabled false 
+  advertise-interval-sec 1
+  priority 30
+  !
+  virtual-ipv4-addresses virtual-ipv4-address 10.0.1.5
+!
+interfaces interface lo
+ type iana-if-type:softwareLoopback
+ ipv4
+ !
+ ipv4 address 3.3.3.3 
+  prefix-length 32
+!

assets/sample-top.yml

@@ -1,18 +1,19 @@
 routers:
   rt1:
     plugin: holo
+    startup-config: ./assets/rt1.conf
     interfaces:
       lo:
         ipv4: 
         - 1.1.1.1/32
-
       eth-sw1:
         ipv4:
         - 10.0.1.1/24
 
 
   rt2:
     plugin: holo
+    startup-config: ./assets/rt2.conf
     interfaces:
       lo:
         ipv4: 
@@ -23,6 +24,7 @@ routers:
 
   rt3:
     plugin: holo 
+    startup-config: ./assets/rt3.conf
     interfaces:
       lo:
         ipv4:

src/bin/netgen.rs

@@ -1,24 +1,56 @@
 #![feature(let_chains)]
 use netgen::plugins::Config;
 use netgen::topology::Topology;
+use netgen::{error::Error, Result};
+
 use std::fs::File;
 
+use clap::{command, Arg};
+
 #[tokio::main]
-async fn main() {
-    let mut topology: Topology = Topology::new();
-    if let Ok(mut config_file) = File::open("./assets/config.yml")
-        && let Ok(mut topo_file) = File::open("./assets/sample-top.yml")
-    {
-        // load the base configuration
-        let config = match Config::from_yaml_file(&mut config_file) {
-            Ok(config) => Some(config),
-            Err(_err) => None,
-        };
-
-        // load the topology configuration
-        topology = Topology::from_yaml_file(&mut topo_file, config).unwrap();
-    }
+async fn main() -> Result<()> {
+    let matches = command!("netgen")
+        .arg(
+            Arg::new("Config File")
+                .short('c')
+                .long("config")
+                .value_name("yaml-file")
+                .help("the file with plugin configs"),
+        )
+        .arg(
+            Arg::new("Topo File")
+                .short('t')
+                .long("topo")
+                .value_name("yaml-file")
+                .help("file with the topology"),
+        )
+        .get_matches();
+    let config = match matches.get_one::<String>("Config File") {
+        Some(config_file) => {
+            let mut config_file = File::open(config_file).unwrap();
+            Config::from_yaml_file(Some(&mut config_file))?
+        }
+        None => Config::from_yaml_file(None)?,
+    };
+
+    let topo_file = match matches.get_one::<String>("Topo File") {
+        Some(topo_file) => topo_file,
+        None => {
+            return Err(Error::GeneralError(String::from(
+                "topolofy file not configured",
+            )))
+        }
+    };
+
+    let mut topo_file = File::open(topo_file).unwrap();
+    let mut topology = Topology::from_yaml_file(&mut topo_file, config).unwrap();
 
     // "powers on" all the devices and sets up all the required links
-    topology.power_on().await.unwrap();
+    topology.power_on().await?;
+
+    // runs the plugins in the routers.
+    // and initiates their startup-config (if present)
+    topology.run().await?;
+
+    Ok(())
 }