ready to test

client_connection_manager.py

@@ -0,0 +1,83 @@
+import socket
+import time
+
+def print_bytes(prefix, data):
+    """Print raw bytes with both hex and ASCII representation"""
+    hex_data = ' '.join(f'{b:02x}' for b in data)
+    ascii_data = ''.join(chr(b) if 32 <= b <= 126 else '.' for b in data)
+    print(f"{prefix} (hex): {hex_data}")
+    print(f"{prefix} (ascii): {ascii_data}")
+
+def create_client(name):
+    """Create and connect a client, handle initial connection sequence"""
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.connect(('localhost', 40000))
+    
+    # Receive welcome message
+    welcome = sock.recv(1024)
+    print(f"\n=== {name} receiving welcome message ===")
+    print_bytes("Received", welcome)
+    
+    # Send username
+    username = f"{name}\n".encode('ascii')
+    print(f"\n=== {name} sending username ===")
+    print_bytes("Sending", username)
+    sock.send(username)
+    
+    # Receive room info
+    room_info = sock.recv(1024)
+    print(f"\n=== {name} receiving room info ===")
+    print_bytes("Received", room_info)
+    
+    return sock
+
+def main():
+    # Create first client
+    print("\nConnecting client 1...")
+    client1 = create_client("Alice")
+    
+    time.sleep(1)  # Small delay between connections
+    
+    # Create second client
+    print("\nConnecting client 2...")
+    client2 = create_client("Bob")
+    
+    # Client 1 should receive notification about client 2
+    join_notification = client1.recv(1024)
+    print("\n=== Alice receiving Bob's join notification ===")
+    print_bytes("Received", join_notification)
+    
+    # Client 1 sends a message
+    message1 = "Hello Bob!\n".encode('ascii')
+    print("\n=== Alice sending message ===")
+    print_bytes("Sending", message1)
+    client1.send(message1)
+    
+    # Client 2 receives the message
+    received1 = client2.recv(1024)
+    print("\n=== Bob receiving message ===")
+    print_bytes("Received", received1)
+    
+    # Client 2 sends a reply
+    message2 = "Hi Alice!\n".encode('ascii')
+    print("\n=== Bob sending message ===")
+    print_bytes("Sending", message2)
+    client2.send(message2)
+    
+    # Client 1 receives the reply
+    received2 = client1.recv(1024)
+    print("\n=== Alice receiving message ===")
+    print_bytes("Received", received2)
+    
+    # Close connections
+    print("\nClosing connections...")
+    client1.close()
+
+    received1 = client2.recv(1024)
+    print("\n=== Bob receiving message ===")
+    print_bytes("Received", received1)
+
+    client2.close()
+
+if __name__ == "__main__":
+    main()

data.c

@@ -99,6 +99,11 @@ char *char_array_get_until_char(char_array_t *array, char c) {
     return ret;
 };
 
+void char_array_put_until_char(char *arr, char_array_t *array, char c) {
+    char *data = char_array_get_until_char(array, c);
+    memcpy(arr, data, strlen(data));
+}
+
 char *char_array_get_bytes(char_array_t *array, size_t length) {
     if (length > array->size) {
         return NULL;

data.h

@@ -22,6 +22,7 @@ void char_array_print_hex(const char_array_t *array);
 void char_array_wipe(char_array_t *array);
 bool char_array_has_char(char_array_t *array, char c);
 char *char_array_get_until_char(char_array_t *array, char c);
+void char_array_put_until_char(char *arr, char_array_t *array, char c);
 char *char_array_get_bytes(char_array_t *array, size_t length);
 void char_array_shift_bytes(char_array_t *array, size_t length);
 

server03.c

@@ -30,7 +30,7 @@ int main() {
         handle_args_t *args = malloc(sizeof(handle_args_t));
         args->client = client;
         args->connection = connection_number++;
-        args->connections = *connections;
+        args->connections = connections;
         pthread_t thread;
         pthread_create(&thread, nullptr, handle_connection, args);
     }
@@ -42,51 +42,72 @@ void *handle_connection(void *args) {
     handle_args_t *handleArgs = args;
     char buffer[1024] = {0};
     int bytesReceived;
-    char *message[1024];
+    status_t status = CONNECTED;
+    char *message = malloc(sizeof(char)*1024);
     char_array_t *data = char_array_create(1024);
     send(handleArgs->client, WELCOME, sizeof(WELCOME), 0);
-    bytesReceived = recv(handleArgs->client, buffer, sizeof(buffer), 0);
+    char *username = malloc(sizeof(char)*1024);
-    char_array_append(data, buffer, bytesReceived);
-    char *username = char_array_get_until_char(data, '\n');
-    if (username == NULL) {
-        printf("{%d} Failed to parse username\n", handleArgs->connection);
-        connections_remove(&handleArgs->connections, handleArgs->client);
-        free(handleArgs);
-        exit(3);
-    }
-    username = trim(username);
-    if (!username_is_valid(username)) {
-        printf("{%d} Invalid username\n", handleArgs->connection);
-        connections_remove(&handleArgs->connections, handleArgs->client);
-        free(handleArgs);
-        exit(3);
-    }
-    pthread_mutex_lock(&mutex);
-    strcat(message, "* The room contains: ");
-    for (int i = 0; i < handleArgs->connections.size; i++) {
-        strcat(message, handleArgs->connections.clients[i].username);
-        strcat(message, " ");
-    }
-    message[strlen(message)-1] = '\n';
-    send(handleArgs->client, message, strlen(message), 0);
-    pthread_mutex_unlock(&mutex);
-
-    connections_append(&handleArgs->connections, handleArgs->client, username);
-    sprintf(message, "* %s has entered the room\n", username);
-    broadcast(&handleArgs->connections, &handleArgs->client, message);
-
-    printf("{%d} Username: %s\n", handleArgs->connection, username);
-
     while ((bytesReceived = recv(handleArgs->client, buffer, sizeof(buffer), 0)) > 0) {
         printf("{%d} Client sent: |%d| \n", handleArgs->connection, bytesReceived);
         char_array_append(data, buffer, bytesReceived);
+        switch (status) {
+            case CONNECTED: {
+                if  ((username = char_array_get_until_char(data, '\n')) != NULL) {
+                    printf("{%d} Username raw: %s\n", handleArgs->connection, username);
+                    if (username == NULL) {
+                        printf("{%d} Failed to parse username\n", handleArgs->connection);
+                        closesocket(handleArgs->client);
+                        free(handleArgs);
+                        pthread_exit(NULL);
+                        exit(3);
+                    }
+                    username = trim(username);
+                    printf("{%d} Username after trim: %s\n", handleArgs->connection, username);
+                    if (!username_is_valid(username)) {
+                        printf("{%d} Invalid username\n", handleArgs->connection);
+                        closesocket(handleArgs->client);
+                        free(handleArgs);
+                        pthread_exit(NULL);
+                        exit(3);
+                    }
+                    pthread_mutex_lock(&mutex);
+                    sprintf(message, "* The room contains: ");
+                    for (int i = 0; i < handleArgs->connections->len; i++) {
+                        strcat(message, handleArgs->connections->clients[i].username);
+                        strcat(message, " ");
+                    }
+                    strcat(message, "\n");
+                    send(handleArgs->client, message, strlen(message), 0);
+                    pthread_mutex_unlock(&mutex);
+
+                    connections_append(handleArgs->connections, handleArgs->client, username);
+                    sprintf(message, "* %s has entered the room\n", username);
+                    broadcast(handleArgs->connections, &handleArgs->client, message);
+
+                    printf("{%d} Username: %s\n", handleArgs->connection, username);
+                    status = IDENTIFIED;
+                }
+                break;
+            }
+            case IDENTIFIED: {
                 char *request;
                 while ((request = char_array_get_until_char(data, '\n')) != NULL) {
                     sprintf(message, "[%s] %s\n", username, request);
+                    broadcast(handleArgs->connections, &handleArgs->client, message);
+                }
+                break;
             }
-        memset(buffer, 0, sizeof(buffer));
         }
 
+
+        memset(buffer, 0, sizeof(buffer));
+    }
+    sprintf(message, "* %s has left the room\n", username);
+    broadcast(handleArgs->connections, &handleArgs->client, message);
+    connections_remove(handleArgs->connections, handleArgs->client);
+    printf("{%d} Client disconnected\n", handleArgs->connection);
+
+    free(message);
     free(args);
     return NULL;
 }
@@ -94,6 +115,7 @@ void *handle_connection(void *args) {
 connections_t *connections_create(const int size) {
     connections_t *connections = malloc(sizeof(connections_t));
     connections->size = size;
+    connections->len = 0;
     connections->clients = calloc(size, sizeof(client_connection_t));
     return connections;
 }
@@ -106,8 +128,8 @@ void connections_append(connections_t *connections, SOCKET client, char *usernam
         exit(1);
     }
     pthread_mutex_lock(&mutex);
-    size_t new_size = connections->size + 1;
+    size_t new_len = connections->len + 1;
-    if (new_size > connections->size) {
+    if (new_len > connections->size) {
         connections->size = connections->size+64;
         client_connection_t *new_array = realloc(connections->clients, connections->size * sizeof(client_connection_t));
         connections->clients = new_array;
@@ -115,16 +137,16 @@ void connections_append(connections_t *connections, SOCKET client, char *usernam
             printf("Failed to allocate memory for array\n");
         }
     }
-    connections->clients[connections->size].client = client;
+    connections->clients[connections->len].client = client;
-    connections->clients[connections->size].username = username;
+    connections->clients[connections->len].username = username;
-    connections->size = new_size;
+    connections->len = new_len;
     printf("{%llu} Connection added\n", connections->size);
     pthread_mutex_unlock(&mutex);
 
 
 };
 void connections_remove(connections_t *connections, SOCKET client) {
-    if (connections == NULL) {
+    if (connections == NULL || connections->clients == NULL) {
         exit(1);
     }
     pthread_mutex_lock(&mutex);
@@ -136,15 +158,20 @@ void connections_remove(connections_t *connections, SOCKET client) {
             for (int j = i; j < connections->size; j++) {
                 connections->clients[j] = connections->clients[j+1];
             }
-            connections->size--;
+            connections->len--;
             printf("{%llu} Connection removed\n", connections->size);
             pthread_mutex_unlock(&mutex);
             return;
         }
     }
+    pthread_mutex_unlock(&mutex);
+    printf("{%llu} Connection not found\n", connections->size);
 }
 
 void broadcast(const connections_t *connections, const SOCKET *source, const char *message) {
+    if (connections == NULL || connections->clients == NULL) {
+        exit(1);
+    }
     pthread_mutex_lock(&mutex);
     for (size_t i = 0; i < connections->size; i++) {
         if (connections->clients[i].client != *source) {

server03.h

@@ -24,10 +24,13 @@ typedef struct Connections {
 typedef struct handleArgs {
     int connection;
     SOCKET client;
-    connections_t connections;
+    connections_t *connections;
 } handle_args_t;
 
-
+typedef enum Status {
+    CONNECTED,
+    IDENTIFIED
+} status_t;
 
 void *handle_connection(void *args);
 

server03_chat_server_tests.py

@@ -2,6 +2,7 @@ import socket
 import threading
 import time
 import unittest
+import sys
 
 class TestBudgetChat(unittest.TestCase):
     SERVER_HOST = 'localhost'
@@ -39,9 +40,11 @@ class TestBudgetChat(unittest.TestCase):
                 _ = self.receive_message(client)  # Welcome message
                 client.send(f"{name}\n".encode('ascii'))
                 # Server should disconnect us
-                response = self.receive_message(client)
                 with self.assertRaises((ConnectionResetError, ConnectionAbortedError, socket.error)):
-                    client.send("test\n".encode('ascii'))
+                    client.sendall("test\n".encode('ascii'))
+                    response = self.receive_message(client)
+                    response = self.receive_message(client)
+                    response = self.receive_message(client)
                 client.close()
     
     def test_valid_username(self):
@@ -95,7 +98,7 @@ class TestBudgetChat(unittest.TestCase):
             client.send(f"{username}\n".encode('ascii'))
             _ = self.receive_message(client)  # Room info
             clients.append(client)
-            time.sleep(0.1)  # Small delay to prevent race conditions
+            # time.sleep(0.1)  # Small delay to prevent race conditions
         
         # Send a message from the last client
         test_message = "Hello from last user!"
@@ -105,6 +108,7 @@ class TestBudgetChat(unittest.TestCase):
         expected = f"[{usernames[-1]}] {test_message}"
         for i in range(len(clients)-1):
             received = self.receive_message(clients[i])
+            print(f"Received: {received}")
             self.assertEqual(expected, received)
         
         # Cleanup
@@ -126,10 +130,49 @@ class TestBudgetChat(unittest.TestCase):
         # Close client2 and check if client1 receives departure message
         client2.close()
         departure_msg = self.receive_message(client1)
+        print(departure_msg)
         self.assertTrue("user2" in departure_msg)
         self.assertTrue(departure_msg.startswith("*"))
         
         client1.close()
 
+def list_tests():
+    """List all available tests"""
+    print("\nAvailable tests:")
+    test_methods = [method for method in dir(TestBudgetChat) if method.startswith('test_')]
+    for i, test in enumerate(test_methods, 1):
+        print(f"{i}. {test}")
+    print("\n0. Run all tests")
+
+def run_selected_test(test_number):
+    """Run a specific test based on user selection"""
+    suite = unittest.TestSuite()
+    test_methods = [method for method in dir(TestBudgetChat) if method.startswith('test_')]
+    
+    if test_number == 0:
+        # Run all tests
+        suite.addTests(unittest.TestLoader().loadTestsFromTestCase(TestBudgetChat))
+    else:
+        try:
+            selected_test = test_methods[test_number - 1]
+            suite.addTest(TestBudgetChat(selected_test))
+        except IndexError:
+            print("Invalid test number!")
+            return
+
+    runner = unittest.TextTestRunner(verbosity=2)
+    runner.run(suite)
+
 if __name__ == '__main__':
-    unittest.main()
+    while True:
+        list_tests()
+        try:
+            choice = input("\nEnter test number (or 'q' to quit): ")
+            if choice.lower() == 'q':
+                break
+            test_number = int(choice)
+            run_selected_test(test_number)
+        except ValueError:
+            print("Please enter a valid number!")
+        
+        input("\nPress Enter to continue...")