Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / if_arp.h

diff --git a/kernel/include/linux/if_arp.h b/kernel/include/linux/if_arp.h
new file mode 100644 (file)
index 0000000..f563907
--- /dev/null
+++ b/kernel/include/linux/if_arp.h
@@ -0,0 +1,47 @@
+/*
+ * 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.
+ *
+ *             Global definitions for the ARP (RFC 826) protocol.
+ *
+ * Version:    @(#)if_arp.h    1.0.1   04/16/93
+ *
+ * Authors:    Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
+ *             Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
+ *             Ross Biro
+ *             Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *             Florian La Roche,
+ *             Jonathan Layes <layes@loran.com>
+ *             Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
+ *
+ *             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.
+ */
+#ifndef _LINUX_IF_ARP_H
+#define _LINUX_IF_ARP_H
+
+#include <linux/skbuff.h>
+#include <uapi/linux/if_arp.h>
+
+static inline struct arphdr *arp_hdr(const struct sk_buff *skb)
+{
+       return (struct arphdr *)skb_network_header(skb);
+}
+
+static inline int arp_hdr_len(struct net_device *dev)
+{
+       switch (dev->type) {
+#if IS_ENABLED(CONFIG_FIREWIRE_NET)
+       case ARPHRD_IEEE1394:
+               /* ARP header, device address and 2 IP addresses */
+               return sizeof(struct arphdr) + dev->addr_len + sizeof(u32) * 2;
+#endif
+       default:
+               /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
+               return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
+       }
+}
+#endif /* _LINUX_IF_ARP_H */