server implementation added

computer_networks/lab/lab2/server.c

@@ -0,0 +1,68 @@
+/**
+ * /mnt/z/my_git/sixth-semester/computer_networks/simulation/scratch/server.c
+ * @author Avinal Kumar
+ * @since February 03, 2021
+ *
+ * LAB 2 - Computer networks
+ * Server program to receive file
+ */
+
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <string.h>
+
+#define PORT 2047
+
+int main()
+{
+    int sock1, sock2, clength;
+    sock1 = socket(AF_INET, SOCK_STREAM, 0);
+    struct sockaddr_in serv, cli;
+
+    //struct sockaddr_in server,client;
+
+    memset(&serv, 0, sizeof(serv));
+    memset(&cli, 0, sizeof(cli));
+
+    serv.sin_family = AF_INET;
+    serv.sin_port = htons(PORT);
+    serv.sin_addr.s_addr = inet_addr("127.0.0.1");
+    bind(sock1, (struct sockaddr *)&serv, sizeof(serv));
+    listen(sock1, 5);
+    printf("Server started\n");
+    clength = sizeof(cli);
+    int i = 0;
+
+    char buf[50];
+    sock2 = accept(sock1, (struct sockaddr *)&cli, &clength);
+    printf("\nClient Connected\n");
+    printf("Receiving Files from Client...\n");
+    sleep(4);
+    FILE *fp = fopen("server.txt", "w");
+    while (1)
+    {
+        //bzero(buf,sizeof(buf));
+        read(sock2, buf, 50);
+        if (strcmp(buf, "complete") == 0)
+        {
+            break;
+        }
+        fprintf(fp, "%s", buf);
+    }
+    printf("File Successfully reveived from Client\n");
+    fclose(fp);
+    printf("Content of the file is \n\n");
+    FILE *rf = fopen("server.txt", "r");
+    char c = fgetc(rf);
+    while (c != EOF)
+    {
+        printf("%c", c);
+        c = fgetc(rf);
+    }
+
+    fclose(rf);
+    return 0;
+}