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Ethernet 编程

前言​

YY3588 支持 1 个 千兆网口（Ethernet0） ，一个 2.5Gbps 网口（Ethernet1）。
yy3588网口图片.jpg

2 连通性测试​

2.1 查看网卡节点​

linaro@linaro-alip:~$ ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.14  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::80ef:1567:63c9:4c3c  prefixlen 64  scopeid 0x20<link>
        ether ae:66:6d:e6:89:eb  txqueuelen 1000  (Ethernet)
        RX packets 226057  bytes 102260286 (97.5 MiB)
        RX errors 0  dropped 20330  overruns 0  frame 0
        TX packets 14258  bytes 1453498 (1.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 72  

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.16  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::8404:6967:3fe1:2517  prefixlen 64  scopeid 0x20<link>
        ether 9a:df:d7:1f:52:58  txqueuelen 1000  (Ethernet)
        RX packets 192  bytes 17570 (17.1 KiB)
        RX errors 0  dropped 20  overruns 0  frame 0
        TX packets 16  bytes 1937 (1.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 67  bytes 4219 (4.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 67  bytes 4219 (4.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

2.2 上网测试​

# 使用 eth0 上网
root@linaro-alip:/# ping -I eth0 -c 8 www.baidu.com
PING www.wshifen.com (103.235.46.96) from 192.168.1.14 eth0: 56(84) bytes of data.
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=1 ttl=45 time=277 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=2 ttl=45 time=270 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=3 ttl=45 time=225 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=4 ttl=45 time=272 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=5 ttl=45 time=275 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=6 ttl=45 time=255 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=7 ttl=45 time=221 ms
64 bytes from 103.235.46.96 (103.235.46.96): icmp_seq=8 ttl=45 time=281 ms

--- www.wshifen.com ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7008ms
rtt min/avg/max/mdev = 220.731/259.456/280.557/22.381 ms
# 使用 eth1 上网
参考 eth0

3 设置静态IP地址​

3.1 修改配置文件​

  • 以网关192.168.1.1为例
cat /etc/network/interfaces

auto eth0
iface eth0 inet static
    address 192.168.1.100
    netmask 255.255.255.0
    gateway 192.168.1.1

auto eth1
iface eth1 inet static
    address 192.168.1.101
    netmask 255.255.255.0
    gateway 192.168.1.1

3.2 重启网络服务​

sudo systemctl restart networking
# 或
reboot

4 简单的UDP DEMO程序​

4.1 源代码​

  • 服务器端源码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>

int main()
{
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    assert(sockfd != -1);

    struct sockaddr_in saddr, caddr;
    memset(&saddr, 0, sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(6000);
    saddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    int res = bind(sockfd, (struct sockaddr *)&saddr, sizeof(saddr));
    assert(res != -1);

    while (1)
    {
        int len = sizeof(caddr);
        char buff[128] = {0};
        recvfrom(sockfd, buff, sizeof(buff) - 1, 0, (struct sockaddr *)&caddr, (socklen_t *)&len);
        printf("buff=%s\n", buff);
        if (strncmp(buff, "end", 3) == 0)
        {
            break;
        }
        sendto(sockfd, "ok", 2, 0, (struct sockaddr *)&caddr, sizeof(caddr));
    }
    close(sockfd);
    exit(0);
}
  • 客户端源码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>

int main()
{
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    assert(sockfd != -1);

    struct sockaddr_in saddr;
    memset(&saddr, 0, sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(6000);
    saddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    while (1)
    {
        char buff[128] = {0};
        printf("input\n");
        fgets(buff, sizeof(buff), stdin);
        if (strncmp(buff, "end", 3) == 0)
        {
            break;
        }
        sendto(sockfd, buff, strlen(buff), 0, (struct sockaddr *)&saddr, sizeof(saddr));
        memset(buff, 0, sizeof(buff));
        int len = sizeof(saddr);
        recvfrom(sockfd, buff, sizeof(buff) - 1, 0, (struct sockaddr *)&saddr, (socklen_t *)&len);
        printf("recv: %s\n", buff);
    }
    close(sockfd);
    exit(0);
}

现象演示动图​

debian12_udp_test.gif

5 简单的TCP DEMO程序​

5.1 源代码​

  • 服务器端源码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    assert(sockfd != -1);

    struct sockaddr_in saddr;
    memset(&saddr, 0, sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(6000);
    saddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    int res = bind(sockfd, (struct sockaddr *)&saddr, sizeof(saddr));
    assert(res != -1);

    res = listen(sockfd, 5);
    assert(res != -1);

    while (1) {
        struct sockaddr_in caddr;
        socklen_t len = sizeof(caddr);
        int clientfd = accept(sockfd, (struct sockaddr *)&caddr, &len);
        assert(clientfd != -1);

        char buff[128] = {0};
        recv(clientfd, buff, sizeof(buff) - 1, 0);
        printf("Received: %s\n", buff);
        if (strncmp(buff, "end", 3) == 0) {
            break;
        }
        send(clientfd, "Message received", 16, 0);
        close(clientfd);
    }
    close(sockfd);
    exit(0);
}
  • 客户端源码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    assert(sockfd != -1);

    struct sockaddr_in saddr;
    memset(&saddr, 0, sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(6000);
    saddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    int res = connect(sockfd, (struct sockaddr *)&saddr, sizeof(saddr));
    assert(res != -1);

    while (1) {
        char buff[128] = {0};
        printf("input\n");
        fgets(buff, sizeof(buff), stdin);
        if (strncmp(buff, "end", 3) == 0) {
            break;
        }
        send(sockfd, buff, strlen(buff), 0);
        memset(buff, 0, sizeof(buff)); 
        recv(sockfd, buff, sizeof(buff) - 1, 0);
        printf("recv: %s\n", buff);
    }
    close(sockfd);
    exit(0);
}

5.2 现象演示动图​

debian12_tcp_test.gif