Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / net / protocol.h

diff --git a/kernel/include/net/protocol.h b/kernel/include/net/protocol.h
new file mode 100644 (file)
index 0000000..d6fcc1f
--- /dev/null
+++ b/kernel/include/net/protocol.h
@@ -0,0 +1,122 @@
+/*
+ * 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.
+ *
+ *             Definitions for the protocol dispatcher.
+ *
+ * Version:    @(#)protocol.h  1.0.2   05/07/93
+ *
+ * Author:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ *             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:
+ *             Alan Cox        :       Added a name field and a frag handler
+ *                                     field for later.
+ *             Alan Cox        :       Cleaned up, and sorted types.
+ *             Pedro Roque     :       inet6 protocols
+ */
+ 
+#ifndef _PROTOCOL_H
+#define _PROTOCOL_H
+
+#include <linux/in6.h>
+#include <linux/skbuff.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/ipv6.h>
+#endif
+#include <linux/netdevice.h>
+
+/* This is one larger than the largest protocol value that can be
+ * found in an ipv4 or ipv6 header.  Since in both cases the protocol
+ * value is presented in a __u8, this is defined to be 256.
+ */
+#define MAX_INET_PROTOS                256
+
+/* This is used to register protocols. */
+struct net_protocol {
+       void                    (*early_demux)(struct sk_buff *skb);
+       int                     (*handler)(struct sk_buff *skb);
+       void                    (*err_handler)(struct sk_buff *skb, u32 info);
+       unsigned int            no_policy:1,
+                               netns_ok:1,
+                               /* does the protocol do more stringent
+                                * icmp tag validation than simple
+                                * socket lookup?
+                                */
+                               icmp_strict_tag_validation:1;
+};
+
+#if IS_ENABLED(CONFIG_IPV6)
+struct inet6_protocol {
+       void    (*early_demux)(struct sk_buff *skb);
+
+       int     (*handler)(struct sk_buff *skb);
+
+       void    (*err_handler)(struct sk_buff *skb,
+                              struct inet6_skb_parm *opt,
+                              u8 type, u8 code, int offset,
+                              __be32 info);
+       unsigned int    flags;  /* INET6_PROTO_xxx */
+};
+
+#define INET6_PROTO_NOPOLICY   0x1
+#define INET6_PROTO_FINAL      0x2
+#endif
+
+struct net_offload {
+       struct offload_callbacks callbacks;
+       unsigned int             flags; /* Flags used by IPv6 for now */
+};
+/* This should be set for any extension header which is compatible with GSO. */
+#define INET6_PROTO_GSO_EXTHDR 0x1
+
+/* This is used to register socket interfaces for IP protocols.  */
+struct inet_protosw {
+       struct list_head list;
+
+        /* These two fields form the lookup key.  */
+       unsigned short   type;     /* This is the 2nd argument to socket(2). */
+       unsigned short   protocol; /* This is the L4 protocol number.  */
+
+       struct proto     *prot;
+       const struct proto_ops *ops;
+  
+       unsigned char    flags;      /* See INET_PROTOSW_* below.  */
+};
+#define INET_PROTOSW_REUSE 0x01             /* Are ports automatically reusable? */
+#define INET_PROTOSW_PERMANENT 0x02  /* Permanent protocols are unremovable. */
+#define INET_PROTOSW_ICSK      0x04  /* Is this an inet_connection_sock? */
+
+extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
+extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS];
+extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS];
+
+#if IS_ENABLED(CONFIG_IPV6)
+extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
+#endif
+
+int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
+int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
+int inet_add_offload(const struct net_offload *prot, unsigned char num);
+int inet_del_offload(const struct net_offload *prot, unsigned char num);
+void inet_register_protosw(struct inet_protosw *p);
+void inet_unregister_protosw(struct inet_protosw *p);
+
+int  udp_add_offload(struct udp_offload *prot);
+void udp_del_offload(struct udp_offload *prot);
+
+#if IS_ENABLED(CONFIG_IPV6)
+int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
+int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
+int inet6_register_protosw(struct inet_protosw *p);
+void inet6_unregister_protosw(struct inet_protosw *p);
+#endif
+int inet6_add_offload(const struct net_offload *prot, unsigned char num);
+int inet6_del_offload(const struct net_offload *prot, unsigned char num);
+
+#endif /* _PROTOCOL_H */