diff --git a/Cargo.lock b/Cargo.lock
index 4a753c1..72b353a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -50,6 +50,7 @@ dependencies = [
  "pnet",
  "pnet_transport",
  "serde",
+ "serde_bytes",
 ]
 
 [[package]]
@@ -291,6 +292,15 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde_bytes"
+version = "0.11.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfc50e8183eeeb6178dcb167ae34a8051d63535023ae38b5d8d12beae193d37b"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.144"
diff --git a/Cargo.toml b/Cargo.toml
index 1438e57..49a0e9b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,6 +21,7 @@ nix = { version = "0.25.0", features = ["net", "socket", "time"] }
 pnet = "0.31.0"
 pnet_transport = "0.31.0"
 serde = { version = "1.0.144", features = ["derive"] }
+serde_bytes = "0.11"
 
 [patch.crates-io]
 nix = { path = "../nix" }
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 7272e2b..ffc7e11 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,3 @@
-extern crate core;
-
 mod cake;
 mod config;
 mod netlink;
@@ -13,8 +11,8 @@ use std::{process, thread, time};
 
 use crate::config::Config;
 use crate::netlink::{find_interface, find_qdisc, get_interface_stats, set_qdisc_rate};
-use crate::pinger::Pinger;
-use crate::pinger_icmp::PingerICMPEcho;
+use crate::pinger::{PingListener, PingSender, Pinger};
+use crate::pinger_icmp::{PingerICMPEcho, PingerICMPEchoListener, PingerICMPEchoSender};
 use crate::pinger_icmp_ts::PingerICMPTimestamps;
 
 #[macro_export]
@@ -43,18 +41,24 @@ fn main() {
 
     get_interface_stats(config.upload_interface.as_str()).unwrap();
 
-    let mut pinger_receiver =
+    /*let mut pinger_receiver =
         PingerICMPTimestamps::new((process::id() & 0xFFFF) as u16, reflectors.clone());
     let mut pinger_sender =
-        PingerICMPTimestamps::new((process::id() & 0xFFFF) as u16, reflectors.clone());
+        PingerICMPTimestamps::new((process::id() & 0xFFFF) as u16, reflectors.clone());*/
+
+    let mut pinger_receiver =
+        PingerICMPEchoListener::new((process::id() & 0xFFF) as u16, reflectors.clone());
+
+    let mut pinger_sender =
+        PingerICMPEchoSender::new((process::id() & 0xFFF) as u16, reflectors.clone());
 
     let receiver_handle = thread::Builder::new()
         .name("receiver".to_string())
-        .spawn(move || pinger_receiver.receive_loop())
+        .spawn(move || pinger_receiver.listen())
         .unwrap();
     let sender_handle = thread::Builder::new()
         .name("sender".to_string())
-        .spawn(move || pinger_sender.sender_loop())
+        .spawn(move || pinger_sender.send())
         .unwrap();
 
     let threads = vec![receiver_handle, sender_handle];
diff --git a/src/pinger.rs b/src/pinger.rs
index d062a75..72a2648 100644
--- a/src/pinger.rs
+++ b/src/pinger.rs
@@ -1,5 +1,106 @@
+use nix::sys::socket::{
+    recvfrom, sendto, socket, AddressFamily, MsgFlags, SockFlag, SockProtocol, SockType,
+    SockaddrIn, SockaddrIn6, SockaddrLike,
+};
 use std::error::Error;
-use std::net::IpAddr;
+use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddrV4, SocketAddrV6};
+use std::str::FromStr;
+use std::thread;
+use std::time::Duration;
+
+pub trait PingListener {
+    fn new(id: u16, reflectors: Vec<IpAddr>) -> Self;
+
+    fn get_id(&self) -> u16;
+    fn get_reflectors(&self) -> Vec<IpAddr>;
+
+    fn listen(&mut self) {
+        let socket = socket(
+            AddressFamily::Inet,
+            SockType::Raw,
+            SockFlag::empty(), /* value */
+            SockProtocol::ICMP,
+        )
+        .expect("Couldn't open socket");
+
+        loop {
+            let mut v: Vec<u8> = vec![0; 128];
+            let buf = v.as_mut_slice();
+
+            let (size, sender) = match recvfrom::<SockaddrIn>(socket, buf) {
+                Ok(val) => val,
+                Err(_) => continue,
+            };
+
+            let (rtt, down_time, up_time) = match Self::parse_packet(buf, size) {
+                Ok(val) => val,
+                Err(e) => {
+                    println!("Shit went to hell: {}", e.to_string());
+                    continue;
+                }
+            };
+        }
+    }
+
+    fn parse_packet(buf: &[u8], len: usize) -> Result<(i64, i64, i64), Box<dyn Error>>;
+}
+
+pub trait PingSender {
+    fn new(id: u16, reflectors: Vec<IpAddr>) -> Self;
+
+    fn get_id(&self) -> u16;
+    fn get_reflectors(&self) -> Vec<IpAddr>;
+
+    fn send(&mut self) {
+        let socket = socket(
+            AddressFamily::Inet,
+            SockType::Raw,
+            SockFlag::empty(), /* value */
+            SockProtocol::ICMP,
+        )
+        .expect("Couldn't open socket");
+
+        let mut seq: u16 = 0;
+        let tick_duration_ms: u16 = 500;
+        let sleep_duration = Duration::from_millis(tick_duration_ms as u64);
+
+        loop {
+            let reflectors = Self::get_reflectors(self);
+
+            for reflector in reflectors.iter() {
+                let addr: Box<dyn SockaddrLike>;
+
+                match reflector.is_ipv4() {
+                    true => {
+                        let ip4 = Ipv4Addr::from_str(&*reflector.to_string()).unwrap();
+                        let sock4 = SocketAddrV4::new(ip4, 0);
+                        addr = Box::new(SockaddrIn::from(sock4));
+                    }
+                    false => {
+                        let ip6 = Ipv6Addr::from_str(&*reflector.to_string()).unwrap();
+                        let sock6 = SocketAddrV6::new(ip6, 0, 0, 0);
+                        addr = Box::new(SockaddrIn6::from(sock6));
+                    }
+                }
+
+                let buf_v = self.craft_packet(seq);
+                let buf = buf_v.as_slice();
+
+                sendto(socket, buf, addr.as_ref(), MsgFlags::empty()).expect("Couldn't send ping");
+            }
+
+            thread::sleep(sleep_duration);
+
+            seq += 1;
+
+            if seq >= u16::MAX {
+                seq = 0;
+            }
+        }
+    }
+
+    fn craft_packet(&self, seq: u16) -> Vec<u8>;
+}
 
 pub trait Pinger {
     fn new(id: u16, reflectors: Vec<IpAddr>) -> Self;
diff --git a/src/pinger_icmp.rs b/src/pinger_icmp.rs
index 75ef559..08bab89 100644
--- a/src/pinger_icmp.rs
+++ b/src/pinger_icmp.rs
@@ -1,9 +1,12 @@
+use bincode::{deserialize, serialize};
 use std::error::Error;
 use std::net::IpAddr;
 use std::{thread, time};
 
+use crate::pinger::{PingListener, PingSender};
 use crate::Pinger;
 use byteorder::*;
+use neli::err::NlError;
 use nix::sys::time::TimeValLike;
 use nix::time::{clock_gettime, ClockId};
 use pnet::packet::icmp::IcmpTypes::EchoReply;
@@ -12,6 +15,19 @@ use pnet::packet::*;
 use pnet_transport::TransportChannelType::Layer4;
 use pnet_transport::TransportProtocol::Ipv4;
 use pnet_transport::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize, Clone, Default, Debug)]
+//#[repr(C)]
+pub struct ICMPEcho {
+    type_: u8,
+    code: u8,
+    checksum: u16,
+    identifier: u16,
+    sequence: u16,
+    #[serde(with = "serde_bytes")]
+    payload: Vec<u8>,
+}
 
 pub struct PingerICMPEcho {
     id: u16,
@@ -20,6 +36,33 @@ pub struct PingerICMPEcho {
     tx: TransportSender,
 }
 
+pub struct PingerICMPEchoListener {
+    id: u16,
+    reflectors: Vec<IpAddr>,
+}
+
+pub struct PingerICMPEchoSender {
+    id: u16,
+    reflectors: Vec<IpAddr>,
+}
+
+fn calculate_checksum(buffer: &mut [u8]) -> u16 {
+    let mut sum = 0u32;
+    for word in buffer.chunks(2) {
+        let mut part = u16::from(word[0]) << 8;
+        if word.len() > 1 {
+            part += u16::from(word[1]);
+        }
+        sum = sum.wrapping_add(u32::from(part));
+    }
+
+    while (sum >> 16) > 0 {
+        sum = (sum & 0xffff) + (sum >> 16);
+    }
+
+    !sum as u16
+}
+
 impl Pinger for PingerICMPEcho {
     fn new(id: u16, reflectors: Vec<IpAddr>) -> Self {
         let protocol = Layer4(Ipv4(IpNextHeaderProtocols::Icmp));
@@ -121,3 +164,65 @@ impl Pinger for PingerICMPEcho {
         Ok(())
     }
 }
+
+impl PingListener for PingerICMPEchoListener {
+    fn new(id: u16, reflectors: Vec<IpAddr>) -> Self {
+        PingerICMPEchoListener { id, reflectors }
+    }
+
+    fn get_id(&self) -> u16 {
+        self.id
+    }
+
+    fn get_reflectors(&self) -> Vec<IpAddr> {
+        self.reflectors.clone()
+    }
+
+    fn parse_packet(buf: &[u8], len: usize) -> Result<(i64, i64, i64), Box<dyn Error>> {
+        if len != 44 {
+            println!("len: {}", len);
+            return Err(Box::new(NlError::msg("Wrong length")));
+        }
+
+        let hdr: ICMPEcho = deserialize(buf).expect("Failed to parse ICMP packet");
+
+        todo!()
+    }
+}
+
+impl PingSender for PingerICMPEchoSender {
+    fn new(id: u16, reflectors: Vec<IpAddr>) -> Self {
+        PingerICMPEchoSender { id, reflectors }
+    }
+
+    fn get_id(&self) -> u16 {
+        self.id
+    }
+
+    fn get_reflectors(&self) -> Vec<IpAddr> {
+        self.reflectors.clone()
+    }
+
+    fn craft_packet(&self, seq: u16) -> Vec<u8> {
+        let time = clock_gettime(ClockId::CLOCK_MONOTONIC).unwrap();
+        let time_u64: u64 = time.num_milliseconds() as u64;
+
+        let mut hdr = ICMPEcho {
+            type_: 8,
+            code: 0,
+            checksum: 0,
+            identifier: self.get_id(),
+            sequence: seq,
+            payload: time_u64.to_ne_bytes().to_vec(),
+        };
+
+        println!("id: {}", hdr.identifier);
+        println!("seq: {}", hdr.sequence);
+
+        let mut tmp_buf_v = serialize(&hdr).unwrap();
+        let mut tmp_buf = tmp_buf_v.as_mut_slice();
+        hdr.checksum = calculate_checksum(tmp_buf).to_be();
+
+        serialize(&hdr).unwrap()
+    }
+}