pin timeout

发布于 2019-08-22 15:18:43 浏览：2203 订阅该版

* 本帖最后由 jszhou 于 2019-8-22 15:23 编辑 *

电脑能够ping通开发板，但是在ping局域网中的IP地址的时候总是timeout。防火墙这些都是关闭了的。刚接触网络这一块,不知道怎么下手.........
msh />
msh />ping 192.168.3.201
lwip_socket(PF_INET, SOCK_RAW, 1) = 0
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=192.168.3.201 port=264
lwip_recvfrom(0, 24006e38, 64z, 0x0, ..)
lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=00000000
lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=-3, netbuf=00000000
lwip_recvfrom[UDP/RAW](0): buf == NULL, error is "Timeout."!
From 192.168.3.201 icmp_seq=0 timeout
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=192.168.3.201 port=36
lwip_recvfrom(0, 24006e38, 64z, 0x0, ..)
lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=00000000
lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=-3, netbuf=00000000
lwip_recvfrom[UDP/RAW](0): buf == NULL, error is "Timeout."!
From 192.168.3.201 icmp_seq=1 timeout
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=192.168.3.201 port=36
lwip_recvfrom(0, 24006e38, 64z, 0x0, ..)
lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=00000000
lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=-3, netbuf=00000000
lwip_recvfrom[UDP/RAW](0): buf == NULL, error is "Timeout."!
From 192.168.3.201 icmp_seq=2 timeout
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=192.168.3.201 port=36
lwip_recvfrom(0, 24006e38, 64z, 0x0, ..)
lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=00000000
lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=-3, netbuf=00000000
lwip_recvfrom[UDP/RAW](0): buf == NULL, error is "Timeout."!
From 192.168.3.201 icmp_seq=3 timeout
lwip_close(0)
msh />ping 127.0.0.1
lwip_socket(PF_INET, SOCK_RAW, 1) = 0
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=127.0.0.1 port=264
Send 127.0.0.1 - error
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=127.0.0.1 port=36
Send 127.0.0.1 - error
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=127.0.0.1 port=36
Send 127.0.0.1 - error
lwip_sendto(0, data=240042d4, short_size=40, flags=0x0 to=127.0.0.1 port=36
Send 127.0.0.1 - error
lwip_close(0)

Wireshark抓包如下：

![host.png](https://oss-club.rt-thread.org/uploads/201908/22/152258bois7hszpataaytz.png)

![201-200.png](https://oss-club.rt-thread.org/uploads/201908/22/151441mnau5jfja7munlnl.png)

![200--201.png](https://oss-club.rt-thread.org/uploads/201908/22/151441d5xg5f65cgqa9zgx.png)