DPDK程序结合网络助手接收数据-编程知识

网络调试工具：https://download.csdn.net/download/hdsHDS6/88390999?spm=1001.2014.3001.5503

DPDK代码：

#include <stdio.h>
#include <string.h>
#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_ip.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_mbuf.h>
#include <rte_mempool.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#define NB_MBUF 512
#define MAX_PKT_BURST 32
#define SELF_PROTO_TYPE 0x0888
static struct rte_eth_conf port_conf = {.rxmode = {.split_hdr_size = 0}
};
// cat /proc/interrupts
void init_port(struct rte_mempool *mbuf_pool){uint16_t nb_ports = 0;int ret = 0;int portid = 0;struct rte_eth_dev_info dev_info;struct rte_ether_addr addr;const int num_rx_queues = 1;const int num_tx_queues = 0;nb_ports = rte_eth_dev_count_avail();if(nb_ports == 0){rte_exit(EXIT_FAILURE, "No support eth found\n");}for(portid = 0; portid < nb_ports; portid++){ret = rte_eth_macaddr_get(portid, &addr);if (ret != 0){rte_exit(EXIT_FAILURE, "macaddr get failed\n");} printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",portid, RTE_ETHER_ADDR_BYTES(&addr));ret = rte_eth_dev_info_get(portid, &dev_info);ret = rte_eth_dev_configure(portid, num_rx_queues, num_tx_queues, &port_conf);ret = rte_eth_rx_queue_setup(portid, 0, 128, rte_eth_dev_socket_id(portid), NULL, mbuf_pool);ret = rte_eth_dev_start(portid);if (ret < 0) {rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n", ret, portid);}}   
}
/*发送方注意设置LP信息
*/
int
main(int argc, char **argv)
{int ret;unsigned lcore_id;int i = 0;int portid = 0;int nb_rx = 0;/* 初始化环境 */ret = rte_eal_init(argc, argv);if (ret < 0)rte_panic("Cannot init EAL\n");/* 创建内存池 */struct rte_mempool *mbuf_pool = rte_pktmbuf_pool_create("my pool", NB_MBUF, 32, 0,RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());if (mbuf_pool == NULL){return -1;}init_port(mbuf_pool);while(1){struct rte_mbuf* pkts_burst[MAX_PKT_BURST];nb_rx = rte_eth_rx_burst(portid, 0, pkts_burst, MAX_PKT_BURST);if(nb_rx == 0){sleep(1);continue;}// printf("recv data start : %d \n", nb_rx);for(i = 0; i < nb_rx; i++){// etherstruct rte_ether_hdr *hdr = rte_pktmbuf_mtod(pkts_burst[i], struct rte_ether_hdr *);// ip// printf("ether_type = %x \n", hdr->ether_type);if(hdr->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)){struct rte_ipv4_hdr *iphdr =  rte_pktmbuf_mtod_offset(pkts_burst[i], struct rte_ipv4_hdr *, sizeof(struct rte_ether_hdr));// updif(iphdr->next_proto_id == IPPROTO_UDP){// (struct rte_udp_hdr *)RTE_PTR_ADD(iphdr, sizeof(struct rte_ipv4_hdr));struct rte_udp_hdr* udphdr = (struct rte_udp_hdr*)(iphdr + 1);uint16_t length = ntohs(udphdr->dgram_len);*(char*)(udphdr + length) = '\0';struct in_addr addr;addr.s_addr = iphdr->src_addr;printf("src:%s:%d \n", inet_ntoa(addr), ntohs(udphdr->src_port));addr.s_addr = iphdr->dst_addr;printf("dst:%s:%d, %s \n", inet_ntoa(addr), ntohs(udphdr->dst_port), (char*)(udphdr+1));}else if(iphdr->next_proto_id == IPPROTO_TCP){struct rte_tcp_hdr* tcphdr = (struct rte_tcp_hdr*)(iphdr + 1);struct in_addr addr;addr.s_addr = iphdr->src_addr;printf("src:%s:%d \n", inet_ntoa(addr), ntohs(tcphdr->src_port));addr.s_addr = iphdr->dst_addr;printf("dst:%s:%d, date = %s \n", inet_ntoa(addr), ntohs(tcphdr->dst_port), (char*)(tcphdr+1));}}else if(hdr->ether_type == rte_cpu_to_be_16(SELF_PROTO_TYPE)){char *data =  rte_pktmbuf_mtod_offset(pkts_burst[i], char *, sizeof(struct rte_ether_hdr));printf("recv data: %s \n", data);}rte_pktmbuf_free(pkts_burst[i]);}}return 0;
}

Makefile文件

# SPDX-License-Identifier: BSD-3-Clause
# Copyright(c) 2010-2014 Intel Corporation# binary name
APP = recv# all source are stored in SRCS-y
SRCS-y := main.cPKGCONF ?= pkg-config# Build using pkg-config variables if possible
ifneq ($(shell $(PKGCONF) --exists libdpdk && echo 0),0)
$(error "no installation of DPDK found")
endifall: shared
.PHONY: shared static
shared: build/$(APP)-sharedln -sf $(APP)-shared build/$(APP)
static: build/$(APP)-staticln -sf $(APP)-static build/$(APP)PC_FILE := $(shell $(PKGCONF) --path libdpdk 2>/dev/null)
CFLAGS += -O3 $(shell $(PKGCONF) --cflags libdpdk)
# Add flag to allow experimental API as l2fwd uses rte_ethdev_set_ptype API
CFLAGS += -DALLOW_EXPERIMENTAL_API
LDFLAGS_SHARED = $(shell $(PKGCONF) --libs libdpdk)
LDFLAGS_STATIC = $(shell $(PKGCONF) --static --libs libdpdk)ifeq ($(MAKECMDGOALS),static)
# check for broken pkg-config
ifeq ($(shell echo $(LDFLAGS_STATIC) | grep 'whole-archive.*l:lib.*no-whole-archive'),)
$(warning "pkg-config output list does not contain drivers between 'whole-archive'/'no-whole-archive' flags.")
$(error "Cannot generate statically-linked binaries with this version of pkg-config")
endif
endifbuild/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)build:@mkdir -p $@.PHONY: clean
clean:rm -f build/$(APP) build/$(APP)-static build/$(APP)-sharedtest -d build && rmdir -p build || true

虚拟机设置

网络适配器2和3用于DPDK的绑定，并设置为桥接模式，使两个网口与物理机处于同一局域网

编译：

加载驱动绑定网卡：

#! /bin/basheth1=$1
eth2=$2
DPDK_PATH=$3
DPDK_KMOD_PATH=$4
if [ -z "$DPDK_PATH" ];thenDPDK_PATH="/root/dpdk-22.07/usertools"
fiif [ -z "$DPDK_KMOD_PATH" ];thenDPDK_KMOD_PATH="/root/dpdk-22.07/kmod"
fi# 关闭网口
ifconfig $eth1 down
ifconfig $eth2 down# 大页
echo 512 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages# 加载uio驱动
modprobe uio
insmod $DPDK_KMOD_PATH/igb_uio.ko intr_mode=legacy
# 加载kni驱动
insmod $DPDK_KMOD_PATH/rte_kni.ko kthread_mode=multiple# 绑定网口
$DPDK_PATH/dpdk-devbind.py -b igb_uio "$eth1" "$eth2"
$DPDK_PATH/dpdk-devbind.py -s