1 files changed, 54 insertions, 0 deletions
diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c
new file mode 100644
index 00000000..9a7978fd
--- /dev/null
+++ b/net/ipv6/protocol.c
@@ -0,0 +1,54 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		PF_INET6 protocol dispatch tables.
+ *
+ * Authors:	Pedro Roque	<roque@di.fc.ul.pt>
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ */
+
+/*
+ *      Changes:
+ *
+ *      Vince Laviano (vince@cs.stanford.edu)       16 May 2001
+ *      - Removed unused variable 'inet6_protocol_base'
+ *      - Modified inet6_del_protocol() to correctly maintain copy bit.
+ */
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <net/protocol.h>
+
+const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
+
+int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
+{
+	int hash = protocol & (MAX_INET_PROTOS - 1);
+
+	return !cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
+			NULL, prot) ? 0 : -1;
+}
+EXPORT_SYMBOL(inet6_add_protocol);
+
+/*
+ *	Remove a protocol from the hash tables.
+ */
+
+int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
+{
+	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+
+	ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
+		       prot, NULL) == prot) ? 0 : -1;
+
+	synchronize_net();
+
+	return ret;
+}
+EXPORT_SYMBOL(inet6_del_protocol);