projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 1da177e4 LT |
2 | /* |
| 3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
| 4 | * operating system. INET is implemented using the BSD Socket | |
| 5 | * interface as the means of communication with the user level. | |
| 6 | * | |
| 7 | * Global definitions for the ARP (RFC 826) protocol. | |
| 8 | * | |
| 9 | * Version: @(#)if_arp.h 1.0.1 04/16/93 | |
| 10 | * | |
| 11 | * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 | |
| 12 | * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. | |
| 02c30a84 | 13 | * Ross Biro |
| 1da177e4 LT |
14 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 15 | * Florian La Roche, | |
| 16 | * Jonathan Layes <layes@loran.com> | |
| 17 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25 | |
| 1da177e4 LT |
18 | */ |
| 19 | #ifndef _LINUX_IF_ARP_H | |
| 20 | #define _LINUX_IF_ARP_H | |
| 21 | ||
| d0a92be0 | 22 | #include <linux/skbuff.h> |
| 607ca46e | 23 | #include <uapi/linux/if_arp.h> |
| d0a92be0 ACM |
24 | |
| 25 | static inline struct arphdr *arp_hdr(const struct sk_buff *skb) | |
| 26 | { | |
| 27 | return (struct arphdr *)skb_network_header(skb); | |
| 28 | } | |
| 988b7050 | 29 | |
| 6ade97da | 30 | static inline unsigned int arp_hdr_len(const struct net_device *dev) |
| 988b7050 | 31 | { |
| 6752c8db YH |
32 | switch (dev->type) { |
| 33 | #if IS_ENABLED(CONFIG_FIREWIRE_NET) | |
| 34 | case ARPHRD_IEEE1394: | |
| 35 | /* ARP header, device address and 2 IP addresses */ | |
| 36 | return sizeof(struct arphdr) + dev->addr_len + sizeof(u32) * 2; | |
| 37 | #endif | |
| 38 | default: | |
| 39 | /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ | |
| 40 | return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; | |
| 41 | } | |
| 988b7050 | 42 | } |
| c491680f DB |
43 | |
| 44 | static inline bool dev_is_mac_header_xmit(const struct net_device *dev) | |
| 45 | { | |
| 46 | switch (dev->type) { | |
| 47 | case ARPHRD_TUNNEL: | |
| 48 | case ARPHRD_TUNNEL6: | |
| 49 | case ARPHRD_SIT: | |
| 50 | case ARPHRD_IPGRE: | |
| a3fa449f | 51 | case ARPHRD_IP6GRE: |
| c491680f DB |
52 | case ARPHRD_VOID: |
| 53 | case ARPHRD_NONE: | |
| 3b707c30 | 54 | case ARPHRD_RAWIP: |
| 4ee06de7 | 55 | case ARPHRD_PIMREG: |
| c491680f DB |
56 | return false; |
| 57 | default: | |
| 58 | return true; | |
| 59 | } | |
| 60 | } | |
| 61 | ||
| 1da177e4 | 62 | #endif /* _LINUX_IF_ARP_H */ |