tcp/quic lab finished

network/tcpquiclab/tcp_client.c

@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
+#define PORT 8080
+#define SERVER_IP "127.0.0.1"
+#define BUFFER_SIZE 1024
+
+int main() {
+    int sock = 0;
+    struct sockaddr_in serv_addr;
+    const char *hello = "Hello from TCP Client";
+    char buffer[BUFFER_SIZE] = {0};
+
+    // 1. Create socket
+    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        printf("\n Socket creation error \n");
+        return -1;
+    }
+
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_port = htons(PORT);
+
+    // Convert IPv4 and IPv6 addresses from text to binary form
+    if (inet_pton(AF_INET, SERVER_IP, &serv_addr.sin_addr) <= 0) {
+        printf("\nInvalid address/ Address not supported \n");
+        return -1;
+    }
+
+    // 2. Connect to server
+    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
+        printf("\nConnection Failed \n");
+        return -1;
+    }
+
+    // 3. Send data
+    send(sock, hello, strlen(hello), 0);
+    printf("Message sent to server: %s\n", hello);
+
+    // 4. Receive response
+    int valread = read(sock, buffer, BUFFER_SIZE);
+    if (valread > 0) {
+        printf("Server response: %s\n", buffer);
+    }
+
+    // 5. Close socket
+    close(sock);
+
+    return 0;
+}