Import source code for dummynet innode emulation.

[ipfw.git] / ipfw / include / alias.h

diff --git a/ipfw/include/alias.h b/ipfw/include/alias.h
new file mode 100644 (file)
index 0000000..888bd0d
--- /dev/null
+++ b/ipfw/include/alias.h
@@ -0,0 +1,71 @@
+#ifndef _ALIAS_H_
+#define        _ALIAS_H_
+
+#define LIBALIAS_BUF_SIZE 128
+
+/*
+ * If PKT_ALIAS_LOG is set, a message will be printed to /var/log/alias.log
+ * every time a link is created or deleted.  This is useful for debugging.
+ */
+#define        PKT_ALIAS_LOG                   0x01
+
+/*
+ * If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g. to ftp,
+ * telnet or web servers will be prevented by the aliasing mechanism.
+ */
+#define        PKT_ALIAS_DENY_INCOMING         0x02
+
+/*
+ * If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from the
+ * same port as they originated on.  This allows e.g. rsh to work *99% of the
+ * time*, but _not_ 100% (it will be slightly flakey instead of not working
+ * at all).  This mode bit is set by PacketAliasInit(), so it is a default
+ * mode of operation.
+ */
+#define        PKT_ALIAS_SAME_PORTS            0x04
+
+/*
+ * If PKT_ALIAS_USE_SOCKETS is set, then when partially specified links (e.g.
+ * destination port and/or address is zero), the packet aliasing engine will
+ * attempt to allocate a socket for the aliasing port it chooses.  This will
+ * avoid interference with the host machine.  Fully specified links do not
+ * require this.  This bit is set after a call to PacketAliasInit(), so it is
+ * a default mode of operation.
+ */
+#ifndef        NO_USE_SOCKETS
+#define        PKT_ALIAS_USE_SOCKETS           0x08
+#endif
+/*-
+ * If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with
+ * unregistered source addresses will be aliased.  Private
+ * addresses are those in the following ranges:
+ *
+ *             10.0.0.0     ->   10.255.255.255
+ *             172.16.0.0   ->   172.31.255.255
+ *             192.168.0.0  ->   192.168.255.255
+ */
+#define        PKT_ALIAS_UNREGISTERED_ONLY     0x10
+
+/*
+ * If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
+ * aliasing links will be reset whenever PacketAliasSetAddress() changes the
+ * default aliasing address.  If the default aliasing address is left
+ * unchanged by this function call, then the table of dynamic aliasing links
+ * will be left intact.  This bit is set after a call to PacketAliasInit().
+ */
+#define        PKT_ALIAS_RESET_ON_ADDR_CHANGE  0x20
+
+
+/*
+ * If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only
+ * transparent proxying is performed.
+ */
+#define        PKT_ALIAS_PROXY_ONLY            0x40
+
+/*
+ * If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn() and
+ * PacketAliasOut() are reversed.
+ */
+#define        PKT_ALIAS_REVERSE               0x80
+
+#endif                         /* !_ALIAS_H_ */