diff --git a/.gitignore b/.gitignore
index 656301a..6ac74d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 
 .vscode/
+.fleet/
\ No newline at end of file
diff --git a/src/global.hpp b/src/global.hpp
index d7d4be9..2966983 100644
--- a/src/global.hpp
+++ b/src/global.hpp
@@ -1,2 +1,3 @@
 extern int board_size;
-extern bool ishost;
\ No newline at end of file
+extern bool ishost;
+extern unsigned short port;
\ No newline at end of file
diff --git a/src/input.cpp b/src/input.cpp
index f15b1c4..5b5efff 100644
--- a/src/input.cpp
+++ b/src/input.cpp
@@ -4,9 +4,11 @@
 
 using std::cout;
 using std::cin;
+using std::cerr;
 
 int board_size;
 bool ishost;
+unsigned short port;
 bool repeat = true;
 void ishost_check() {
 
@@ -34,22 +36,40 @@ void board_size_check() {
 repeat = true;
 
 while (repeat) {
-cout << "\nplease enter board size(for example: 3 for 3x3): ";
+    cout << "\nplease enter board size(for example: 3 for 3x3): ";
 
-cin >> board_size;
-if(cin.fail()) {
-      cout << "integer please\n";
-      cin.clear();
-      cin.ignore(256,'\n');
-    } else {
-        if(board_size > 0) {
-          repeat = false;
-    } else {
-        cout << "positive integer please\n";
+    cin >> board_size;
+    if(cin.fail()) {
+        cerr << "integer please\n";
+        cin.clear();
+        cin.ignore(256,'\n');
+        } else {
+            if(board_size > 0) {
+                repeat = false;
+            } else {
+                cerr << "positive integer please\n";
+            }
+        }
     }
-
-
-  
-}
 }
+
+void port_check() {
+    repeat = true;
+
+    while (repeat) {
+        cout << "\nplease enter port you want to host on: ";
+
+        cin >> port;
+        if(cin.fail()) {
+            cerr << "integer please (range: 1-65535)\n";
+            cin.clear();
+            cin.ignore(256,'\n');
+            } else {
+                if(board_size > 0) {
+                    repeat = false;
+                } else {
+                    cerr << "positive integer please\n";
+                }
+            }
+        }
 }
\ No newline at end of file
diff --git a/src/input.hpp b/src/input.hpp
index 4bcc794..9f9f207 100644
--- a/src/input.hpp
+++ b/src/input.hpp
@@ -1,2 +1,3 @@
 void ishost_check();
-void board_size_check();
\ No newline at end of file
+void board_size_check();
+void port_check();
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index b7182fc..1f01950 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,6 +6,7 @@
 
 using std::cout;
 using std::cin;
+using std::cerr;
 
 int main() {
 
@@ -41,12 +42,16 @@ cout << R"( ___       __   _______   ___       ________  ________  _____ ______
 int board_size;
 
 ishost_check();
-board_size_check();
 
+
+if(ishost) {
+    board_size_check();
+    port_check();
+}
 {
 int init_net_status = init_net();
 if(init_net_status != 0){
-  cout << "failed to initialize network\n";
+  cerr << "failed to initialize network\n";
   return 2;
 }
 }
diff --git a/src/net.cpp b/src/net.cpp
index 5ad834f..3478c71 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1,8 +1,29 @@
-#include"net.hpp"
+#include "global.hpp"
+#include "net.hpp"
+#include <iostream>
+#include <string>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/uio.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <fstream>
+
 
 
 int init_net() {
     
+    if(ishost) {
+
+    }
     return 0;
 }