1 files changed, 86 insertions, 0 deletions

diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c
new file mode 100644
index 000000000000..52c1d58b6ca6
--- /dev/null
+++ b/net/ipv6/protocol.c
@@ -0,0 +1,86 @@
+/*
+ * 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.
+ *
+ * Version:     $Id: protocol.c,v 1.10 2001/05/18 02:25:49 davem Exp $
+ *
+ * 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/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+
+struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
+static DEFINE_SPINLOCK(inet6_proto_lock);
+
+
+int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol)
+{
+        int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+
+        spin_lock_bh(&inet6_proto_lock);
+
+        if (inet6_protos[hash]) {
+                ret = -1;
+        } else {
+                inet6_protos[hash] = prot;
+                ret = 0;
+        }
+
+        spin_unlock_bh(&inet6_proto_lock);
+
+        return ret;
+}
+
+/*
+ *      Remove a protocol from the hash tables.
+ */
+ 
+int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol)
+{
+        int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+
+        spin_lock_bh(&inet6_proto_lock);
+
+        if (inet6_protos[hash] != prot) {
+                ret = -1;
+        } else {
+                inet6_protos[hash] = NULL;
+                ret = 0;
+        }
+
+        spin_unlock_bh(&inet6_proto_lock);
+
+        synchronize_net();
+
+        return ret;
+}