1*25d11a86SBruce Richardson /* SPDX-License-Identifier: BSD-3-Clause 2*25d11a86SBruce Richardson * Copyright(c) 2018 Intel Corporation 3*25d11a86SBruce Richardson */ 4*25d11a86SBruce Richardson 5*25d11a86SBruce Richardson /* 6*25d11a86SBruce Richardson * eBPF program sample. 7*25d11a86SBruce Richardson * Accepts pointer to struct rte_mbuf as an input parameter. 8*25d11a86SBruce Richardson * Dump the mbuf into stdout if it is an ARP packet (aka tcpdump 'arp'). 9*25d11a86SBruce Richardson * 10*25d11a86SBruce Richardson * To compile on x86: 11*25d11a86SBruce Richardson * clang -O2 -U __GNUC__ -I${RTE_SDK}/${RTE_TARGET}/include \ 12*25d11a86SBruce Richardson * -target bpf -Wno-int-to-void-pointer-cast -c t3.c 13*25d11a86SBruce Richardson * 14*25d11a86SBruce Richardson * To compile on ARM: 15*25d11a86SBruce Richardson * clang -O2 -I/usr/include/aarch64-linux-gnu \ 16*25d11a86SBruce Richardson * -I${RTE_SDK}/${RTE_TARGET}/include -target bpf \ 17*25d11a86SBruce Richardson * -Wno-int-to-void-pointer-cast -c t3.c 18*25d11a86SBruce Richardson */ 19*25d11a86SBruce Richardson 20*25d11a86SBruce Richardson #include <stdint.h> 21*25d11a86SBruce Richardson #include <stddef.h> 22*25d11a86SBruce Richardson #include <stdio.h> 23*25d11a86SBruce Richardson #include <net/ethernet.h> 24*25d11a86SBruce Richardson #include <rte_config.h> 25*25d11a86SBruce Richardson #include "mbuf.h" 26*25d11a86SBruce Richardson #include <arpa/inet.h> 27*25d11a86SBruce Richardson 28*25d11a86SBruce Richardson extern void rte_pktmbuf_dump(FILE *, const struct rte_mbuf *, unsigned int); 29*25d11a86SBruce Richardson 30*25d11a86SBruce Richardson uint64_t 31*25d11a86SBruce Richardson entry(const void *pkt) 32*25d11a86SBruce Richardson { 33*25d11a86SBruce Richardson const struct rte_mbuf *mb; 34*25d11a86SBruce Richardson const struct ether_header *eth; 35*25d11a86SBruce Richardson 36*25d11a86SBruce Richardson mb = pkt; 37*25d11a86SBruce Richardson eth = rte_pktmbuf_mtod(mb, const struct ether_header *); 38*25d11a86SBruce Richardson 39*25d11a86SBruce Richardson if (eth->ether_type == htons(ETHERTYPE_ARP)) 40*25d11a86SBruce Richardson rte_pktmbuf_dump(stdout, mb, 64); 41*25d11a86SBruce Richardson 42*25d11a86SBruce Richardson return 1; 43*25d11a86SBruce Richardson } 44