diff --git a/src/common/mod.rs b/src/common/mod.rs
index 7d9b9a6..a6bb89e 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -1,86 +1,4 @@
 pub mod cipherkeys;
+pub mod network;
 
-use std::net::TcpStream;
-use std::io::{Read, Write};
-use libpso::crypto::{PSOCipher, CipherError};
-use libpso::{PSOPacket, PacketParseError};
 
-#[derive(Debug)]
-pub enum PacketNetworkError {
-    CouldNotSend,
-    CipherError(CipherError),
-    PacketParseError(PacketParseError),
-    IOError(std::io::Error),
-    DataNotReady,
-    ClientDisconnected,
-}
-
-impl From<CipherError> for PacketNetworkError {
-    fn from(err: CipherError) -> PacketNetworkError {
-        PacketNetworkError::CipherError(err)
-    }
-}
-
-impl From<std::io::Error> for PacketNetworkError {
-    fn from(err: std::io::Error) -> PacketNetworkError {
-        PacketNetworkError::IOError(err)
-    }
-}
-
-impl From<PacketParseError> for PacketNetworkError {
-    fn from(err: PacketParseError) -> PacketNetworkError {
-        PacketNetworkError::PacketParseError(err)
-    }
-}
-
-pub fn recv_packet<T: Read>(socket: &mut T, cipher: &mut dyn PSOCipher) -> Result<Vec<u8>, PacketNetworkError> {
-    let mut size_buf = vec![0u8; cipher.header_size()];
-    let mut offset = 0;
-    while offset < cipher.header_size() {
-        let diff = socket.read(&mut size_buf[offset..])?;
-        println!("! {} {:?}", diff, size_buf);
-        if diff == 0 {
-            return Err(PacketNetworkError::ClientDisconnected);
-        }
-        offset += diff;
-    }
-
-    let mut dec_size_buf = cipher.decrypt(&size_buf)?;
-    let size = u16::from_le_bytes([dec_size_buf[0], dec_size_buf[1]]) as usize;
-
-    let mut data_buf = vec![0u8; size - cipher.header_size()];
-    let mut offset = 0;
-    while offset < size - cipher.header_size() {
-        let diff = socket.read(&mut data_buf[offset..])?;
-        if diff == 0 {
-            return Err(PacketNetworkError::ClientDisconnected);
-        }
-        offset += diff;
-    }
-
-    let mut null_data_count = 0;
-    while data_buf.len() % cipher.header_size() != 0 {
-        data_buf.push(0);
-        null_data_count += 1;
-    }
-    
-    let mut dec_data_buf = cipher.decrypt(&data_buf.to_vec())?;
-
-    for _ in  0..null_data_count {
-        dec_data_buf.pop();
-    }
-    
-    let mut full_buf = Vec::new();
-    full_buf.append(&mut dec_size_buf);
-    full_buf.append(&mut dec_data_buf);
-
-    //println!("[recv]: {:X?}", full_buf);
-    Ok(full_buf)
-}
-
-pub fn send_packet<T: Write>(socket: &mut T, cipher: &mut dyn PSOCipher, pkt: &dyn PSOPacket) -> Result<(), PacketNetworkError> {
-    let buf = pkt.as_bytes();
-    //println!("[send]: {:X?}", buf);
-    let cbuf = cipher.encrypt(&buf)?;
-    Ok(socket.write_all(&cbuf)?)
-}
diff --git a/src/common/network.rs b/src/common/network.rs
new file mode 100644
index 0000000..c1976f0
--- /dev/null
+++ b/src/common/network.rs
@@ -0,0 +1,84 @@
+use std::net::TcpStream;
+use std::io::{Read, Write};
+use libpso::crypto::{PSOCipher, CipherError};
+use libpso::{PSOPacket, PacketParseError};
+
+#[derive(Debug)]
+pub enum PacketNetworkError {
+    CouldNotSend,
+    CipherError(CipherError),
+    PacketParseError(PacketParseError),
+    IOError(std::io::Error),
+    DataNotReady,
+    ClientDisconnected,
+}
+
+impl From<CipherError> for PacketNetworkError {
+    fn from(err: CipherError) -> PacketNetworkError {
+        PacketNetworkError::CipherError(err)
+    }
+}
+
+impl From<std::io::Error> for PacketNetworkError {
+    fn from(err: std::io::Error) -> PacketNetworkError {
+        PacketNetworkError::IOError(err)
+    }
+}
+
+impl From<PacketParseError> for PacketNetworkError {
+    fn from(err: PacketParseError) -> PacketNetworkError {
+        PacketNetworkError::PacketParseError(err)
+    }
+}
+
+pub fn recv_packet<T: Read>(socket: &mut T, cipher: &mut dyn PSOCipher) -> Result<Vec<u8>, PacketNetworkError> {
+    let mut size_buf = vec![0u8; cipher.header_size()];
+    let mut offset = 0;
+    while offset < cipher.header_size() {
+        let diff = socket.read(&mut size_buf[offset..])?;
+        println!("! {} {:?}", diff, size_buf);
+        if diff == 0 {
+            return Err(PacketNetworkError::ClientDisconnected);
+        }
+        offset += diff;
+    }
+
+    let mut dec_size_buf = cipher.decrypt(&size_buf)?;
+    let size = u16::from_le_bytes([dec_size_buf[0], dec_size_buf[1]]) as usize;
+
+    let mut data_buf = vec![0u8; size - cipher.header_size()];
+    let mut offset = 0;
+    while offset < size - cipher.header_size() {
+        let diff = socket.read(&mut data_buf[offset..])?;
+        if diff == 0 {
+            return Err(PacketNetworkError::ClientDisconnected);
+        }
+        offset += diff;
+    }
+
+    let mut null_data_count = 0;
+    while data_buf.len() % cipher.header_size() != 0 {
+        data_buf.push(0);
+        null_data_count += 1;
+    }
+    
+    let mut dec_data_buf = cipher.decrypt(&data_buf.to_vec())?;
+
+    for _ in  0..null_data_count {
+        dec_data_buf.pop();
+    }
+    
+    let mut full_buf = Vec::new();
+    full_buf.append(&mut dec_size_buf);
+    full_buf.append(&mut dec_data_buf);
+
+    //println!("[recv]: {:X?}", full_buf);
+    Ok(full_buf)
+}
+
+pub fn send_packet<T: Write>(socket: &mut T, cipher: &mut dyn PSOCipher, pkt: &dyn PSOPacket) -> Result<(), PacketNetworkError> {
+    let buf = pkt.as_bytes();
+    //println!("[send]: {:X?}", buf);
+    let cbuf = cipher.encrypt(&buf)?;
+    Ok(socket.write_all(&cbuf)?)
+}
diff --git a/src/login/main.rs b/src/login/main.rs
index 9aab57e..bc12c61 100644
--- a/src/login/main.rs
+++ b/src/login/main.rs
@@ -10,7 +10,7 @@ use libpso::packet::login::*;
 use libpso::crypto::{CipherError, PSOCipher, NullCipher};
 use libpso::crypto::bb::PSOBBCipher;
 
-use elseware::common::{send_packet, recv_packet, PacketNetworkError};
+use elseware::common::network::{send_packet, recv_packet, PacketNetworkError};
 use elseware::common::cipherkeys::{ELSEWHERE_PRIVATE_KEY, ELSEWHERE_PARRAY};
 
 const LOGIN_PORT: u16 = 12000;
diff --git a/src/patch/main.rs b/src/patch/main.rs
index 9eabac1..8760a98 100644
--- a/src/patch/main.rs
+++ b/src/patch/main.rs
@@ -14,7 +14,7 @@ use libpso::{PacketParseError, PSOPacket};
 use libpso::packet::patch::*;
 use libpso::crypto::{CipherError, PSOCipher, NullCipher};
 use libpso::crypto::pc::PSOPCCipher;
-use elseware::common::{send_packet, recv_packet, PacketNetworkError};
+use elseware::common::network::{send_packet, recv_packet, PacketNetworkError};
 
 const PATCH_PORT: u16 = 11000;