From a400b233a2c345642708b3f5869fb4a74f594944 Mon Sep 17 00:00:00 2001
From: Blitblank <pmcgeee03@gmail.com>
Date: Sun, 19 Jul 2026 23:01:36 -0500
Subject: [PATCH] add broadcasting

---
 client/src/TcpClient.cpp |  4 +++-
 common/TcpBase.cpp       |  3 ++-
 server/src/TcpServer.cpp | 49 ++++++++++++++++++++++++++++------------
 server/src/TcpServer.hpp |  4 ++++
 4 files changed, 43 insertions(+), 17 deletions(-)

diff --git a/client/src/TcpClient.cpp b/client/src/TcpClient.cpp
index 467d47a..370cc0c 100644
--- a/client/src/TcpClient.cpp
+++ b/client/src/TcpClient.cpp
@@ -80,6 +80,7 @@ ErrorCode TcpClient::init() {
         // listen for receive from the server
         memset(buffer, 0x00, sizeof(buffer));
         receiveBytes = tcpRead(socketFd, buffer, sizeof(buffer)); // TODO: this currently blocks forever, add timeout
+        // TODO: separate thread
 
         // we expect a response based on the server design, something went wrong otherwise
         if(receiveBytes < 0) {
@@ -91,7 +92,8 @@ ErrorCode TcpClient::init() {
             return ErrorCode::Error;
         }
 
-        logger_->log("TcpClient", LogFlag::Debug, "Received {} bytes back from the server", receiveBytes);
+        std::string receivedMessage(buffer, receiveBytes);
+        logger_->log("TcpClient", LogFlag::Debug, "Received {} bytes back from the server: {}", receiveBytes, receivedMessage);
     }
 
     close(socketFd);
diff --git a/common/TcpBase.cpp b/common/TcpBase.cpp
index c38fd3c..9f76043 100644
--- a/common/TcpBase.cpp
+++ b/common/TcpBase.cpp
@@ -42,7 +42,8 @@ ssize_t TcpBase::tcpRead(int fd, void* buffer, size_t maxBytes) {
     }
     return bytesReceived;
 
-}
+} // TODO: tcp read should accept a header struct as an argument and write the header data into the struct
+// can be as simple as a union with a char[8] if you want;
 
 ssize_t TcpBase::tcpTimedRead(int fd, void* buffer, size_t maxBytes, int timeoutPlaceholder) {
     return 0;
diff --git a/server/src/TcpServer.cpp b/server/src/TcpServer.cpp
index 8fdf4e4..7c01d61 100644
--- a/server/src/TcpServer.cpp
+++ b/server/src/TcpServer.cpp
@@ -36,7 +36,6 @@ ErrorCode TcpServer::init() {
     struct sockaddr_in clientAddress; // ip address of the client
     char clientIp[20];
     int clientPort;
-    uint32_t clientCount = 0;
 
     serverSocket = socket(AF_INET, SOCK_STREAM, 0); // create the server's endpoint
     // AF_INET: address-family: internet (alias for IPV4, AF_INET6 for ipv6)
@@ -153,20 +152,9 @@ ErrorCode TcpServer::init() {
                     sockets[i].fd = -1;
                 } else {
 
-                    // receive success, everything below is a simulated "processMessage()"
-                    std::string message(buffer, receiveBytes);
-                    logger_->log("TcpClient", LogFlag::Debug, "Received {} bytes from client {}: {}",
-                        receiveBytes, clientAddresses[i], message);
-
-                    // echo back received data back to the client
-                    ssize_t sendBytes = tcpSend(sockets[i].fd, buffer, receiveBytes);
-
-                    if(sendBytes < 0) {
-                        logger_->log("TcpServer", LogFlag::Error, "Unable to send to client.");
-                        return ErrorCode::Error;
-                    }
-                    logger_->log("TcpClient", LogFlag::Debug, "Echoed {} bytes back to client {}",
-                        sendBytes, clientAddresses[i]);
+                    // receive success
+                    handleMessage(buffer, receiveBytes, 0, i);
+                    
                 }
             }
         }
@@ -177,3 +165,34 @@ ErrorCode TcpServer::init() {
 
     return ErrorCode::Success;
 }
+
+ErrorCode TcpServer::handleMessage(const char* message, size_t msgLength, uint32_t messageType, size_t socketId) {
+
+    std::string messageString(message, msgLength);
+    logger_->log("TcpClient", LogFlag::Debug, "Received {} bytes from client {}: {}",
+        msgLength, clientAddresses[socketId], messageString);
+
+    // broadcast to all clients
+    if(broadcastMessage(message, msgLength) != ErrorCode::Success) {
+        logger_->log("TcpServer", LogFlag::Error, "Broadcast failure.");
+        return ErrorCode::Error;
+    }
+
+    return ErrorCode::Success;
+}
+
+ErrorCode TcpServer::broadcastMessage(const char* message, size_t msgLength) {
+
+    for(size_t i = 1; i < clientCount; i++) {
+
+        ssize_t sendBytes = tcpSend(sockets[i].fd, message, msgLength);
+        if(sendBytes != msgLength) {
+            logger_->log("TcpServer", LogFlag::Error, "Unable to send to client {}", clientAddresses[i]);
+            return ErrorCode::Error;
+        }
+    }
+
+    logger_->log("TcpClient", LogFlag::Debug, "Broadcasted {} bytes to {} clients", msgLength, clientCount);
+
+    return ErrorCode::Success;
+}
\ No newline at end of file
diff --git a/server/src/TcpServer.hpp b/server/src/TcpServer.hpp
index 2815b8c..ebd4067 100644
--- a/server/src/TcpServer.hpp
+++ b/server/src/TcpServer.hpp
@@ -33,5 +33,9 @@ private:
 
     struct pollfd sockets[kMaxClients + 1];
     std::string clientAddresses[kMaxClients + 1];
+    uint32_t clientCount = 0;
+
+    ErrorCode handleMessage(const char* message, size_t msgLength, uint32_t messageType, size_t socketId);
+    ErrorCode broadcastMessage(const char* message, size_t msgLength);
 
 };