45ae05df82
Suggested-by: Maxime Coquelin <maxime.coquelin@redhat.com> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
43 lines
1.0 KiB
C
43 lines
1.0 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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#include <arpa/inet.h>
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#include <rte_arp.h>
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#define RARP_PKT_SIZE 64
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int
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rte_net_make_rarp_packet(struct rte_mbuf *mbuf, const struct ether_addr *mac)
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{
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struct ether_hdr *eth_hdr;
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struct arp_hdr *rarp;
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if (mbuf->buf_len < RARP_PKT_SIZE)
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return -1;
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/* Ethernet header. */
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eth_hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
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memset(eth_hdr->d_addr.addr_bytes, 0xff, ETHER_ADDR_LEN);
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ether_addr_copy(mac, ð_hdr->s_addr);
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eth_hdr->ether_type = htons(ETHER_TYPE_RARP);
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/* RARP header. */
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rarp = (struct arp_hdr *)(eth_hdr + 1);
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rarp->arp_hrd = htons(ARP_HRD_ETHER);
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rarp->arp_pro = htons(ETHER_TYPE_IPv4);
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rarp->arp_hln = ETHER_ADDR_LEN;
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rarp->arp_pln = 4;
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rarp->arp_op = htons(ARP_OP_REVREQUEST);
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ether_addr_copy(mac, &rarp->arp_data.arp_sha);
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ether_addr_copy(mac, &rarp->arp_data.arp_tha);
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memset(&rarp->arp_data.arp_sip, 0x00, 4);
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memset(&rarp->arp_data.arp_tip, 0x00, 4);
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mbuf->data_len = RARP_PKT_SIZE;
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mbuf->pkt_len = RARP_PKT_SIZE;
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return 0;
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}
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