Virgin import of ntpd 4.2.6p5.

When the series of commits is complete, things like
https://cert.litnet.lt/en/docs/ntp-distributed-reflection-dos-attacks
should be fixed.

PR:		bin/148836 (except that we import a newer version)
Asked by:	Too many
MFC after:	2 weeks

1 files changed, 53 insertions, 0 deletions

diff --git a/include/ntp_data_structures.h b/include/ntp_data_structures.h
new file mode 100644
index 0000000..363e0b4
--- /dev/null
+++ b/include/ntp_data_structures.h
@@ -0,0 +1,53 @@
+/* ntp_data_structures.h
+ *
+ * This file contains the structures and function prototypes for the data 
+ * structures used by the ntp configuration code and the discrete event 
+ * simulator.
+ *
+ * Written By: Sachin Kamboj
+ *             University of Delaware
+ *             Newark, DE 19711
+ * Copyright (c) 2006
+ */
+
+#ifndef __NTP_DATA_STRUCTURES_H__
+#define __NTP_DATA_STRUCTURES_H__
+
+
+/* Structures for storing a priority queue 
+ * ---------------------------------------
+ */
+
+typedef struct node {
+	union {
+		struct node *next;
+		double d;
+	} nodeu;
+} node;
+#define node_next nodeu.next
+    
+typedef struct Queue {
+    int (*get_order)(void *, void *);
+    node *front;
+    int no_of_elements;
+} queue;
+
+
+/* FUNCTION PROTOTYPES
+ * -------------------
+ */
+queue *create_priority_queue(int (*get_order)(void *, void *));
+void destroy_queue(queue *my_queue);
+void *get_node(size_t size);
+void free_node(void *my_node);
+void *next_node(void *my_node);
+int empty(queue *my_queue);
+void *queue_head(queue *my_queue);
+queue *enqueue(queue *my_queue, void *my_node);
+void *dequeue(queue *my_queue);
+int get_no_of_elements(queue *my_queue);
+void append_queue(queue *q1, queue *q2);
+int get_fifo_order(void *el1, void *el2);
+queue *create_queue(void);
+
+#endif