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-rw-r--r--test/bpf/t3.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/test/bpf/t3.c b/test/bpf/t3.c
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+++ b/test/bpf/t3.c
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+/* 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:
+ * clang -O2 -I${RTE_SDK}/${RTE_TARGET}/include \
+ * -target bpf -Wno-int-to-void-pointer-cast -c t3.c
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <net/ethernet.h>
+#include <rte_config.h>
+#include "mbuf.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 == __builtin_bswap16(ETHERTYPE_ARP))
+ rte_pktmbuf_dump(stdout, mb, 64);
+
+ return 1;
+}