1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2018 Intel Corporation 3 */ 4 5 #include <rte_arp.h> 6 7 #define RARP_PKT_SIZE 64 8 struct rte_mbuf * 9 rte_net_make_rarp_packet(struct rte_mempool *mpool, 10 const struct rte_ether_addr *mac) 11 { 12 struct rte_ether_hdr *eth_hdr; 13 struct rte_arp_hdr *rarp; 14 struct rte_mbuf *mbuf; 15 16 if (mpool == NULL) 17 return NULL; 18 19 mbuf = rte_pktmbuf_alloc(mpool); 20 if (mbuf == NULL) 21 return NULL; 22 23 eth_hdr = (struct rte_ether_hdr *) 24 rte_pktmbuf_append(mbuf, RARP_PKT_SIZE); 25 if (eth_hdr == NULL) { 26 rte_pktmbuf_free(mbuf); 27 return NULL; 28 } 29 30 /* Ethernet header. */ 31 memset(eth_hdr->dst_addr.addr_bytes, 0xff, RTE_ETHER_ADDR_LEN); 32 rte_ether_addr_copy(mac, ð_hdr->src_addr); 33 eth_hdr->ether_type = RTE_BE16(RTE_ETHER_TYPE_RARP); 34 35 /* RARP header. */ 36 rarp = (struct rte_arp_hdr *)(eth_hdr + 1); 37 rarp->arp_hardware = RTE_BE16(RTE_ARP_HRD_ETHER); 38 rarp->arp_protocol = RTE_BE16(RTE_ETHER_TYPE_IPV4); 39 rarp->arp_hlen = RTE_ETHER_ADDR_LEN; 40 rarp->arp_plen = 4; 41 rarp->arp_opcode = RTE_BE16(RTE_ARP_OP_REVREQUEST); 42 43 rte_ether_addr_copy(mac, &rarp->arp_data.arp_sha); 44 rte_ether_addr_copy(mac, &rarp->arp_data.arp_tha); 45 memset(&rarp->arp_data.arp_sip, 0x00, 4); 46 memset(&rarp->arp_data.arp_tip, 0x00, 4); 47 48 return mbuf; 49 } 50