this is where dhclient will start surgery

1 files changed, 107 insertions, 0 deletions

diff --git a/sbin/dhclient/tree.h b/sbin/dhclient/tree.h
new file mode 100644
index 00000000000..c2df41f52b1
--- /dev/null
+++ b/sbin/dhclient/tree.h
@@ -0,0 +1,107 @@
+/* tree.h
+
+   Definitions for address trees... */
+
+/*
+ * Copyright (c) 1995 The Internet Software Consortium.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The Internet Software Consortium nor the names
+ *    of its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
+ * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
+ * Enterprises.  To learn more about the Internet Software Consortium,
+ * see ``http://www.vix.com/isc''.  To learn more about Vixie
+ * Enterprises, see ``http://www.vix.com''.
+ */
+
+/* A pair of pointers, suitable for making a linked list. */
+typedef struct _pair {
+	caddr_t car;
+	struct _pair *cdr;
+} *pair;
+
+/* Tree node types... */
+#define TREE_CONCAT		1
+#define TREE_HOST_LOOKUP	2
+#define TREE_CONST		3
+#define TREE_LIMIT		4
+
+/* Tree structure for deferred evaluation of changing values. */
+struct tree {
+	int op;
+	union {
+		struct concat {
+			struct tree *left;
+			struct tree *right;
+		} concat;
+		struct host_lookup {
+			struct dns_host_entry *host;
+		} host_lookup;
+		struct const_val {
+			unsigned char *data;
+			int len;
+		} const_val;
+		struct limit {
+			struct tree *tree;
+			int limit;
+		} limit;
+	} data;
+};
+
+/* DNS host entry structure... */
+struct dns_host_entry {
+	char *hostname;
+	unsigned char *data;
+	int data_len;
+	int buf_len;
+	TIME timeout;
+};
+
+struct tree_cache {
+	unsigned char *value;
+	int len;
+	int buf_size;
+	TIME timeout;
+	struct tree *tree;
+	int flags;
+#define	TC_AWAITING_RESOLUTION	1
+#define TC_TEMPORARY		2
+};
+
+struct universe {
+	char *name;
+	struct hash_table *hash;
+	struct option *options [256];
+};
+
+struct option {
+	char *name;
+	char *format;
+	struct universe *universe;
+	unsigned char code;
+};