update C snipplets

code/C/AF_INET_sockets/echo_server.c

@@ -5,44 +5,44 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 
-int main()
-{
-    int sock, listener;
-    struct sockaddr_in addr;
-    char buf[1024];
-    int bytes_read;
+int main() {
+  int sock, listener;
+  struct sockaddr_in addr;
+  char buf[1024];
+  int bytes_read;
 
-    listener = socket(AF_INET, SOCK_STREAM, 0);
-    if (listener < 0) {
-        perror("socket");
-        exit(1);
+  listener = socket(AF_INET, SOCK_STREAM, 0);
+  if (listener < 0) {
+    perror("socket");
+    exit(1);
+  }
+
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(3425);
+  addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  if (bind(listener, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    perror("bind");
+    exit(2);
+  }
+
+  listen(listener, 1);
+
+  while (1) {
+    sock = accept(listener, NULL, NULL);
+    if (sock < 0) {
+      perror("accept");
+      exit(3);
     }
 
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(3425);
-    addr.sin_addr.s_addr = htonl(INADDR_ANY);
-    if (bind(listener, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
-        perror("bind");
-        exit(2);
+    while (1) {
+      bytes_read = recv(sock, buf, 1024, 0);
+      if (bytes_read <= 0)
+        break;
+      send(sock, buf, bytes_read, 0);
     }
 
-    listen(listener, 1);
+    close(sock);
+  }
 
-    while(1) {
-        sock = accept(listener, NULL, NULL);
-        if (sock < 0) {
-            perror("accept");
-            exit(3);
-        }
-
-        while(1) {
-            bytes_read = recv(sock, buf, 1024, 0);
-            if (bytes_read <= 0) break;
-            send(sock, buf, bytes_read, 0);
-        }
-
-        close(sock);
-    }
-
-    return 0;
+  return 0;
 }