updates

.env

@@ -0,0 +1,4 @@
+SERVER_IP=172.30.0.39
+SERVER_PORT=3030
+CLIENT_IP=172.30.0.40
+NET_SUBNET=

client.cpp

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+#include <fstream>
+#include <cstdlib>
+
+void load_env(const std::string& path) {
+    std::ifstream f(path);
+    std::string line;
+    while (std::getline(f, line)) {
+        if (line.empty() || line[0] == '#') continue;
+        auto pos = line.find('=');
+        if (pos == std::string::npos) continue;
+
+        std::string key = line.substr(0, pos);
+        std::string val = line.substr(pos + 1);
+
+#ifdef _WIN32
+        _putenv_s(key.c_str(), val.c_str());
+#else
+        setenv(key.c_str(), val.c_str(), 1);
+#endif
+    }
+}
+namespace std {}
+
+int main(void){
+    load_env(".env");
+    // Declare variables
+    const char *server_ip = std::getenv("SERVER_IP");
+    const int server_port = std::atoi(std::getenv("SERVER_PORT"));
+    char client_message[1024];
+    char server_message[1024];
+    // Create socket:
+
+    // Send connection request to server, be sure to set por tand IP the same as server-side
+
+    // Get input from the user:
+    printf("Enter message sent to the server: ");
+    // fgets(client_message);
+
+    // Send the message to server:
+
+    // Receive the server's response:
+
+
+    printf("Server's response: %s\n", server_message);
+
+    // Close the socket
+
+    return 0;
+}

docker-compose.yml

@@ -0,0 +1,48 @@
+services:
+  server:
+    image: gcc:13
+    working_dir: /app
+    volumes:
+      - ./:/app:rw
+    env_file:
+      - .env
+    networks:
+      net-hw1:
+        ipv4_address: ${SERVER_IP}
+    command: >
+      bash -lc "
+        set -euo pipefail;
+        g++ -std=c++17 -O2 -Wall -Wextra -pedantic /app/server.cpp -o /tmp/server;
+        echo '[server] IP='$(hostname -i)' SERVER_IP='${SERVER_IP}' SERVER_PORT='${APP_PORT};
+        exec /tmp/server
+      "
+
+  client:
+    image: gcc:13
+    working_dir: /app
+    volumes:
+      - ./:/app:rw
+    env_file:
+      - .env
+    networks:
+      net-hw1:
+        ipv4_address: ${CLIENT_IP}
+    depends_on:
+      - server
+    stdin_open: true
+    tty: true
+    command: >
+      bash -lc "
+        set -euo pipefail;
+        g++ -std=c++17 -O2 -Wall -Wextra -pedantic /app/client.cpp -o /tmp/client;
+        echo '[client] IP='$(hostname -i)' CLIENT_IP='${CLIENT_IP}' SERVER_IP='${SERVER_IP}' APP_PORT='${APP_PORT};
+        exec /tmp/client
+      "
+
+networks:
+  net-hw1:
+    name: net-hw1
+    driver: bridge
+    ipam:
+      config:
+        - subnet: ${NET_SUBNET}

server.cpp

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+int main(void){
+
+    // Declare variables
+    const char *server_ip = "127.0.0.1";
+    const int server_port = 8080;
+    char client_message[1024];
+    char server_message[1024];
+    // Create socket
+    
+
+    // Bind to the set port and IP
+    printf("Done with binding with IP: %s, Port: %d\n", server_ip, server_port);
+
+    // Listen for clients:
+    const char *client_ip = "127.0.0.1";
+    const int client_port = 12345;
+
+    // Accept an incoming connection
+    printf("Client connected at IP: %s and port: %i\n", client_ip, client_port);
+
+    // Receive client's message
+    printf("Msg from client: %s\n", client_message);
+
+    // Respond to client
+    strcpy(server_message, "Hello from server");
+
+    // Close the socket
+
+    return 0;
+}