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e69fe84595
Currently, many programs under sample/bpf often include individual macros by directly including the header under "linux/" rather than using the "vmlinux.h" header. However, there are some problems with migrating to "vmlinux.h" because there is no definition for utility functions such as endianness conversion (ntohs/htons). Fortunately, the xdp_sample program already has a function that can be replaced to solve this problem. Therefore, this commit attempts to separate these functions into a file called net_shared.h to make them universally available. Additionally, this file includes network-related macros that are not defined in "vmlinux.h". (inspired by 'selftests' bpf_tracing_net.h) Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-8-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
26 lines
737 B
C
26 lines
737 B
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef _NET_SHARED_H
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#define _NET_SHARED_H
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#define ETH_ALEN 6
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#define ETH_P_802_3_MIN 0x0600
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#define ETH_P_8021Q 0x8100
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#define ETH_P_8021AD 0x88A8
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#define ETH_P_IP 0x0800
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#define ETH_P_IPV6 0x86DD
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#define ETH_P_ARP 0x0806
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#define IPPROTO_ICMPV6 58
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#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
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__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define bpf_ntohs(x) __builtin_bswap16(x)
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#define bpf_htons(x) __builtin_bswap16(x)
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#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
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__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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#define bpf_ntohs(x) (x)
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#define bpf_htons(x) (x)
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#else
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# error "Endianness detection needs to be set up for your compiler?!"
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#endif
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#endif
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