Clean up the code

packet-exchange/src/send_packet.c

@@ -43,7 +43,7 @@
 
 static int process_socket_error_queue();
 static void print_timestamps(struct msghdr *msg);
-static void process_timestamps(int recvmsg_flags);
+static void process_timestamps();
 
 static int so_priority = 3;
 static struct sock_txtime sk_txtime;
@@ -170,15 +170,14 @@ void send_udp_packet(int use_etf, int use_timestamps, uint64_t txtime,
     FD_SET(fd, &readfs);
 
     res = select(fd + 1, &readfs, 0, NULL, NULL);
-    printf("select returned: %d, %s\n", res, res < 0 ? strerror(errno) : "success");
-    if (res > 0) {
-      if (FD_ISSET(fd, &readfs)) printf("ready for reading\n");
-      process_timestamps(MSG_ERRQUEUE);
-    }
+    if (res > 0)
+      process_timestamps();
+    else
+      fprintf(stderr, "select failed\n");
   }
 }
 
-static void process_timestamps(int recvmsg_flags) {
+static void process_timestamps() {
   char data[256];
   struct msghdr msg;
   struct iovec entry;
@@ -199,7 +198,7 @@ static void process_timestamps(int recvmsg_flags) {
   msg.msg_control = &control;
   msg.msg_controllen = sizeof(control);
 
-  if (recvmsg(fd, &msg, recvmsg_flags | MSG_DONTWAIT) == -1) {
+  if (recvmsg(fd, &msg, MSG_ERRQUEUE | MSG_DONTWAIT) == -1) {
     fprintf(stderr, "recvmsg failed\n");
   }
   else {
@@ -222,12 +221,16 @@ static void print_timestamps(struct msghdr *msg) {
             break;
           }
           default:
+#ifdef DEBUG
             printf("type %d", cmsg->cmsg_type);
+#endif
             break;
         }
         break;
       default:
+#ifdef DEBUG
         printf("level %d type %d", cmsg->cmsg_level, cmsg->cmsg_type);
+#endif
         break;
     }
     printf("\n");