DPDK  20.11.6
examples/bpf/t3.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Intel Corporation
*/
/*
* eBPF program sample.
* Accepts pointer to struct rte_mbuf as an input parameter.
* Dump the mbuf into stdout if it is an ARP packet (aka tcpdump 'arp').
*
* To compile on x86:
* clang -O2 -U __GNUC__ -target bpf -Wno-int-to-void-pointer-cast -c t3.c
*
* To compile on ARM:
* clang -O2 -I/usr/include/aarch64-linux-gnu -target bpf \
* -Wno-int-to-void-pointer-cast -c t3.c
*
* NOTE: if DPDK is not installed system-wide, add compiler flag with path
* to DPDK rte_mbuf.h file to above commands,
* e.g. "clang -I/path/to/dpdk/headers -O2 ..."
*/
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <net/ethernet.h>
#include <rte_config.h>
#include <rte_mbuf_core.h>
#include <arpa/inet.h>
extern void rte_pktmbuf_dump(FILE *, const struct rte_mbuf *, unsigned int);
uint64_t
entry(const void *pkt)
{
const struct rte_mbuf *mb;
const struct ether_header *eth;
mb = pkt;
eth = rte_pktmbuf_mtod(mb, const struct ether_header *);
if (eth->ether_type == htons(ETHERTYPE_ARP))
rte_pktmbuf_dump(stdout, mb, 64);
return 1;
}