【测试项目开源】基于LwIP实现在一个网口上同时支持IPv6+IPv4通信

本文基于恩智浦的i.MX RT1170 EVK及SDK，讨论如何在一个以太网口上同时实现IPv6和IPv4通信。

测试环境：

• SDK：2.10.1

• IDE: MCUXpresso 11.4.0

• EVK: i.MX RT1170

• PC: Windows10

2、在lwipopts.h文件中, 参考本文提供的代码链接, 添加以下代码：

#define LWIP_IPV6 1

3、在lwip_udpecho_bm.c文件中, 参考本文提供的代码链接，添加以下代码：

ip6_addr_t ipaddr_v6;
s8_t chosen_idx;
IPv6
IP6_ADDR(&ipaddr_v6,PP_HTONL(0xFE800000),PP_HTONL(0x0),PP_HTONL(0x3DD79303),PP_HTONL(0x126c0df0));
netif_add_ip6_address(&netif, &ipaddr_v6, &chosen_idx);
netif.ip6_addr_state[chosen_idx] = IP6_ADDR_VALID;
ip6_addr_assign_zone(ip_2_ip6(&netif.ip6_addr[0]), IP6_UNICAST, &netif);
netif_ip6_addr_set_state(&netif, 0, IP6_ADDR_TENTATIVE);

5、参考下图用网线连接PC机和目标板。

C:\Users\nxa16038>ping 192.168.0.102
Pinging 192.168.0.102 with 32 bytes of data:
Reply from 192.168.0.102: bytes=32 time=2ms TTL=255
Reply from 192.168.0.102: bytes=32 time=1ms TTL=255
Reply from 192.168.0.102: bytes=32 time=1ms TTL=255
Reply from 192.168.0.102: bytes=32 time=1ms TTL=255
Ping statistics for 192.168.0.102:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 2ms, Average = 1ms

C:\Users\nxa16038>ping -6 FE80::3DD7:9303:126c:0df0
Pinging fe80::3dd7:9303:126c:df0 with 32 bytes of data:
Reply from fe80::3dd7:9303:126c:df0: time=1ms
Reply from fe80::3dd7:9303:126c:df0: time=1ms
Reply from fe80::3dd7:9303:126c:df0: time=1ms
Reply from fe80::3dd7:9303:126c:df0: time=2ms
Ping statistics for fe80::3dd7:9303:126c:df0:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 2ms, Average = 1ms

7、UDP测试

UDP测试需要使用相关的工具，在本文提供的代码链接中附带了此工具，测试命令和log如下所示：

C:\Users\nxa16038\Desktop\tt2\udp_test_tool\x64\Debug>udp_test.exe -6 FE80::3DD7:9303:126c:df0 7 5001 test_string_12345
Build date and time: Oct 22 2021, 18:50:48
arc = 6
arg[0] = udp_test.exe
arg[1] = -6
arg[2] = FE80::3DD7:9303:126c:df0
arg[3] = 7
arg[4] = 5001
arg[5] = test_string_12345
Send ok.
Receiving...
Get connection.
Get string: test_string_12345
Remote addr: fe80:0000:0000:0000:3dd7:9303:126c:0df0

C:\Users\nxa16038\Desktop\tt2\udp_test_tool\x64\Debug>udp_test.exe -4 192.168.0.102 7 5001 test_string_12345
Build date and time: Oct 22 2021, 18:50:48
arc = 6
arg[0] = udp_test.exe
arg[1] = -4
arg[2] = 192.168.0.102
arg[3] = 7
arg[4] = 5001
arg[5] = test_string_12345
Send ok.
Receiving...
Get connection.
Get string: test_string_12345, len = 17
Remote addr: 192.168.0.102

本文的原代码可以从github.com进行下载，无需密码，下载链接为：

https://github.com/jiaguonxpcom/lwip_ipv6_ipv4

该代码编译后可以直接下载到i.MX RT1170 EVK运行。