25d11a86c5
The bpf folder didn't actual contain a test application, but instead basic examples of BPF code for use with testpmd. Therefore we can move it to the `examples` folder. Being different, it also needs a README with it, explaining what it is and how to use it. References to the code from the testpmd docs are suitably updated. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
44 lines
1 KiB
C
44 lines
1 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2018 Intel Corporation
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*/
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/*
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* eBPF program sample.
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* Accepts pointer to struct rte_mbuf as an input parameter.
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* Dump the mbuf into stdout if it is an ARP packet (aka tcpdump 'arp').
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*
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* To compile on x86:
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* clang -O2 -U __GNUC__ -I${RTE_SDK}/${RTE_TARGET}/include \
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* -target bpf -Wno-int-to-void-pointer-cast -c t3.c
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*
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* To compile on ARM:
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* clang -O2 -I/usr/include/aarch64-linux-gnu \
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* -I${RTE_SDK}/${RTE_TARGET}/include -target bpf \
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* -Wno-int-to-void-pointer-cast -c t3.c
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <net/ethernet.h>
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#include <rte_config.h>
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#include "mbuf.h"
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#include <arpa/inet.h>
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extern void rte_pktmbuf_dump(FILE *, const struct rte_mbuf *, unsigned int);
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uint64_t
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entry(const void *pkt)
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{
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const struct rte_mbuf *mb;
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const struct ether_header *eth;
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mb = pkt;
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eth = rte_pktmbuf_mtod(mb, const struct ether_header *);
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if (eth->ether_type == htons(ETHERTYPE_ARP))
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rte_pktmbuf_dump(stdout, mb, 64);
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return 1;
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}
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