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62 lines
1.6 KiB
62 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* INET An implementation of the TCP/IP protocol suite for the LINUX |
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* operating system. INET is implemented using the BSD Socket |
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* interface as the means of communication with the user level. |
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* |
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* Global definitions for the ARP (RFC 826) protocol. |
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* |
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* Version: @(#)if_arp.h 1.0.1 04/16/93 |
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* |
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* Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 |
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* Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. |
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* Ross Biro |
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* Fred N. van Kempen, <[email protected]> |
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* Florian La Roche, |
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* Jonathan Layes <[email protected]> |
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* Arnaldo Carvalho de Melo <[email protected]> ARPHRD_HWX25 |
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*/ |
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#ifndef _LINUX_IF_ARP_H |
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#define _LINUX_IF_ARP_H |
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#include <linux/skbuff.h> |
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#include <uapi/linux/if_arp.h> |
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static inline struct arphdr *arp_hdr(const struct sk_buff *skb) |
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{ |
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return (struct arphdr *)skb_network_header(skb); |
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} |
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static inline unsigned int arp_hdr_len(const struct net_device *dev) |
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{ |
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switch (dev->type) { |
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#if IS_ENABLED(CONFIG_FIREWIRE_NET) |
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case ARPHRD_IEEE1394: |
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/* ARP header, device address and 2 IP addresses */ |
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return sizeof(struct arphdr) + dev->addr_len + sizeof(u32) * 2; |
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#endif |
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default: |
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/* ARP header, plus 2 device addresses, plus 2 IP addresses. */ |
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return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; |
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} |
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} |
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static inline bool dev_is_mac_header_xmit(const struct net_device *dev) |
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{ |
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switch (dev->type) { |
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case ARPHRD_TUNNEL: |
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case ARPHRD_TUNNEL6: |
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case ARPHRD_SIT: |
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case ARPHRD_IPGRE: |
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case ARPHRD_IP6GRE: |
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case ARPHRD_VOID: |
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case ARPHRD_NONE: |
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case ARPHRD_RAWIP: |
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case ARPHRD_PIMREG: |
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return false; |
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default: |
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return true; |
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} |
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} |
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#endif /* _LINUX_IF_ARP_H */
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