Add examples

examples/default_gateway.rs

@@ -0,0 +1,5 @@
+use default_net;
+
+fn main(){
+    default_net::get_default_gateway();
+}

src/lib.rs

@@ -1,13 +1,13 @@
 use std::net::UdpSocket;
 use pnet::transport::TransportChannelType::Layer4;
 use pnet::transport::TransportProtocol::Ipv4;
-use std::time;
+//use std::time;
 use std::time::{Duration, Instant};
 use std::net::IpAddr;
 //use pnet::packet::Packet;
 use pnet::transport::icmp_packet_iter;
 
-pub fn get_router_ip(){
+pub fn get_default_gateway(){
     let buf = [0u8; 0];
     let socket = match UdpSocket::bind("0.0.0.0:0") {
         Ok(s) => s,
@@ -34,7 +34,7 @@ pub fn receive_icmp_packets(rx: &mut pnet::transport::TransportReceiver, icmp_ty
     let mut iter = icmp_packet_iter(rx);
     let start_time = Instant::now();
     loop {
-        match iter.next_with_timeout(time::Duration::from_millis(100)) {
+        match iter.next_with_timeout(timeout) {
             Ok(r) => {
                 if let Some((packet, addr)) = r {
                     if packet.get_icmp_type() == icmp_type {
@@ -57,32 +57,34 @@ pub fn receive_icmp_packets(rx: &mut pnet::transport::TransportReceiver, icmp_ty
     }
 }
 
+/*
 #[cfg(target_os = "windows")]
-pub fn receive_icmp_packets(rx: &mut pnet::transport::TransportReceiver, icmp_type: pnet::packet::icmp::IcmpType, timeout: &Duration) -> Result<String, String>{
+fn send_icmp_packet(){
+    
+}
+*/
+#[cfg(target_os = "windows")]
+fn receive_icmp_packets(rx: &mut pnet::transport::TransportReceiver, icmp_type: pnet::packet::icmp::IcmpType, timeout: &Duration) -> Result<String, String>{
     let mut iter = icmp_packet_iter(rx);
     let start_time = Instant::now();
     loop {
         match iter.next() {
             Ok((packet, addr)) => {
-                if let Some((packet, addr)) = r {
                 if packet.get_icmp_type() == icmp_type {
                     match addr {
                         IpAddr::V4(ipv4_addr) =>{return Ok(ipv4_addr.to_string())},
                         IpAddr::V6(ipv6_addr) =>{return Ok(ipv6_addr.to_string())},
                     }
                 }
-                }else{
-                    return Err(String::from("Failed to read packet"));
-                }
             },
             Err(e) => {
                 return Err(format!("An error occurred while reading: {}", e));
             }
         }
-    }
         if Instant::now().duration_since(start_time) > *timeout {
             return Err(String::from("timeout"));
         }
+    }
 }
 
 #[cfg(test)]