server file implemented

computer_networks/lab/lab3/server.c

@@ -0,0 +1,84 @@
+/**
+ * /mnt/z/my_git/sixth-semester/computer_networks/lab/lab3/server.c
+ * @file server.c
+ * @author Avinal Kumar
+ * @since February 10, 2021
+ *
+ * Server Implementation
+ */
+
+#include <sys/socket.h>
+#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
+#include <stdlib.h>
+
+int main()
+{
+    char buf[100];
+    int k;
+    socklen_t len;
+    int sock_desc, temp_sock_desc;
+    struct sockaddr_in server, client;
+
+    memset(&server, 0, sizeof(server));
+    memset(&client, 0, sizeof(client));
+
+    sock_desc = socket(AF_INET, SOCK_STREAM, 0);
+    if (sock_desc == -1)
+    {
+        printf("Error in socket creation");
+        exit(1);
+    }
+
+    server.sin_family = AF_INET;
+    server.sin_addr.s_addr = INADDR_ANY;
+    //server.sin_addr.s_addr=inet_addr("127.0.0.1");
+    server.sin_port = 3002;
+
+    k = bind(sock_desc, (struct sockaddr *)&server, sizeof(server));
+    if (k == -1)
+    {
+        printf("Error in binding");
+        exit(1);
+    }
+
+    k = listen(sock_desc, 20);
+    if (k == -1)
+    {
+        printf("Error in listening");
+        exit(1);
+    }
+
+    len = sizeof(client); //VERY IMPORTANT
+    temp_sock_desc = accept(sock_desc, (struct sockaddr *)&client, &len);
+    if (temp_sock_desc == -1)
+    {
+        printf("Error in temporary socket creation");
+        exit(1);
+    }
+
+    printf("Getting image size ...\n");
+    int data_size;
+    read(temp_sock_desc, &data_size, sizeof(int));
+
+    printf("Getting image, please wait ...\n");
+    char receive_buf[data_size];
+    FILE *image;
+    image = fopen("received.jpg", "w");
+    int nb = read(temp_sock_desc, receive_buf, data_size);
+    while (nb > 0)
+    {
+        fwrite(receive_buf, 1, nb, image);
+        nb = read(temp_sock_desc, receive_buf, data_size);
+    }
+
+    fclose(image);
+    sleep(2);
+    printf("Image received successfully !!");
+
+    close(temp_sock_desc);
+
+    exit(0);
+    return 0;
+}