[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/net/ipv4/protocol.c b/ap/os/linux/linux-3.4.x/net/ipv4/protocol.c
new file mode 100644
index 0000000..9ae5c01
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/ipv4/protocol.c
@@ -0,0 +1,61 @@
+/*
+ * 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.
+ *
+ * INET protocol dispatch tables.
+ *
+ * Authors: Ross Biro
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ * Fixes:
+ * Alan Cox : Ahah! udp icmp errors don't work because
+ * udp_err is never called!
+ * Alan Cox : Added new fields for init and ready for
+ * proper fragmentation (_NO_ 4K limits!)
+ * Richard Colella : Hang on hash collision
+ * Vince Laviano : Modified inet_del_protocol() to correctly
+ * maintain copy bit.
+ *
+ * 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.
+ */
+#include <linux/cache.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <net/protocol.h>
+
+const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly;
+
+/*
+ * Add a protocol handler to the hash tables
+ */
+
+int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
+{
+ int hash = protocol & (MAX_INET_PROTOS - 1);
+
+ return !cmpxchg((const struct net_protocol **)&inet_protos[hash],
+ NULL, prot) ? 0 : -1;
+}
+EXPORT_SYMBOL(inet_add_protocol);
+
+/*
+ * Remove a protocol from the hash tables.
+ */
+
+int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
+{
+ int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+
+ ret = (cmpxchg((const struct net_protocol **)&inet_protos[hash],
+ prot, NULL) == prot) ? 0 : -1;
+
+ synchronize_net();
+
+ return ret;
+}
+EXPORT_SYMBOL(inet_del_protocol);