From 45ae05df824c49769e591b7fc8728855bba9ab0b Mon Sep 17 00:00:00 2001 From: Xiao Wang Date: Wed, 10 Jan 2018 09:23:54 +0800 Subject: [PATCH] net: add a helper for making RARP packet Suggested-by: Maxime Coquelin Signed-off-by: Xiao Wang Reviewed-by: Maxime Coquelin --- lib/librte_net/Makefile | 1 + lib/librte_net/rte_arp.c | 42 ++++++++++++++++++++++++++++++ lib/librte_net/rte_arp.h | 17 ++++++++++++ lib/librte_net/rte_net_version.map | 6 +++++ 4 files changed, 66 insertions(+) create mode 100644 lib/librte_net/rte_arp.c diff --git a/lib/librte_net/Makefile b/lib/librte_net/Makefile index 5e8a76b68f..ab290c382a 100644 --- a/lib/librte_net/Makefile +++ b/lib/librte_net/Makefile @@ -13,6 +13,7 @@ LIBABIVER := 1 SRCS-$(CONFIG_RTE_LIBRTE_NET) := rte_net.c SRCS-$(CONFIG_RTE_LIBRTE_NET) += rte_net_crc.c +SRCS-$(CONFIG_RTE_LIBRTE_NET) += rte_arp.c # install includes SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include := rte_ip.h rte_tcp.h rte_udp.h rte_esp.h diff --git a/lib/librte_net/rte_arp.c b/lib/librte_net/rte_arp.c new file mode 100644 index 0000000000..d7223b044d --- /dev/null +++ b/lib/librte_net/rte_arp.c @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Intel Corporation + */ + +#include + +#include + +#define RARP_PKT_SIZE 64 +int +rte_net_make_rarp_packet(struct rte_mbuf *mbuf, const struct ether_addr *mac) +{ + struct ether_hdr *eth_hdr; + struct arp_hdr *rarp; + + if (mbuf->buf_len < RARP_PKT_SIZE) + return -1; + + /* Ethernet header. */ + eth_hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *); + memset(eth_hdr->d_addr.addr_bytes, 0xff, ETHER_ADDR_LEN); + ether_addr_copy(mac, ð_hdr->s_addr); + eth_hdr->ether_type = htons(ETHER_TYPE_RARP); + + /* RARP header. */ + rarp = (struct arp_hdr *)(eth_hdr + 1); + rarp->arp_hrd = htons(ARP_HRD_ETHER); + rarp->arp_pro = htons(ETHER_TYPE_IPv4); + rarp->arp_hln = ETHER_ADDR_LEN; + rarp->arp_pln = 4; + rarp->arp_op = htons(ARP_OP_REVREQUEST); + + ether_addr_copy(mac, &rarp->arp_data.arp_sha); + ether_addr_copy(mac, &rarp->arp_data.arp_tha); + memset(&rarp->arp_data.arp_sip, 0x00, 4); + memset(&rarp->arp_data.arp_tip, 0x00, 4); + + mbuf->data_len = RARP_PKT_SIZE; + mbuf->pkt_len = RARP_PKT_SIZE; + + return 0; +} diff --git a/lib/librte_net/rte_arp.h b/lib/librte_net/rte_arp.h index 183641874b..dad7423ad3 100644 --- a/lib/librte_net/rte_arp.h +++ b/lib/librte_net/rte_arp.h @@ -76,6 +76,23 @@ struct arp_hdr { struct arp_ipv4 arp_data; } __attribute__((__packed__)); +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Make a RARP packet based on MAC addr. + * + * @param mbuf + * Pointer to the rte_mbuf structure + * @param mac + * Pointer to the MAC addr + * + * @return + * - 0 on success, negative on error + */ +int +rte_net_make_rarp_packet(struct rte_mbuf *mbuf, const struct ether_addr *mac); + #ifdef __cplusplus } #endif diff --git a/lib/librte_net/rte_net_version.map b/lib/librte_net/rte_net_version.map index 687c40eaf8..213e6fd327 100644 --- a/lib/librte_net/rte_net_version.map +++ b/lib/librte_net/rte_net_version.map @@ -12,3 +12,9 @@ DPDK_17.05 { rte_net_crc_set_alg; } DPDK_16.11; + +EXPERIMENTAL { + global: + + rte_net_make_rarp_packet; +} DPDK_17.05; -- 2.20.1