[ifconfig] Wrong networking interface information issue. #4355

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1. BernardXiong

   assigned

   Guozhanxin

   on Feb 20, 2021
2. Guozhanxin commented on Feb 22, 2021

   

   Guozhanxin

   on Feb 22, 2021

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   @xiangxistu please take a look, thanks!
3. xiangxistu commented on Feb 22, 2021

   

   xiangxistu

   on Feb 22, 2021

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   According to your log, your network device both are ETH device.
   For ETH device, The network information will be provided by lwip protocol stack.

   I think you can direct get information of lwip netif[0] and netif[1].
   the possible reason:

   1. The log is too old, you should refresh it. Maybe when you send “ifconfig” command，the "e1" haven't been worked at that time.
   2. netif[1] haven't work normally, your code for dual-ethernet is error.
4. wosayttn commented on Feb 23, 2021

   

   wosayttn

   on Feb 23, 2021

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   Here, bug->(rt_strncmp(netdev->name, name, RT_NAME_MAX) == 0)

   Revert to previous version -> (rt_strncmp(netdev->name, name, rt_strlen(netdev->name))
   it's fine on our platform.

   msh />ifconfig
   network interface device: e0 (Default)
   MTU: 1500
   MAC: 82 06 21 53 94 53
   FLAGS: UP LINK_UP INTERNET_DOWN DHCP_ENABLE ETHARP BROADCAST IGMP
   ip address: 192.168.1.199
   gw address: 192.168.1.1
   net mask : 255.255.255.0
   dns server #0: 192.168.31.1
   dns server #1: 10.1.8.12

   network interface device: e1
   MTU: 1500
   MAC: 82 06 21 53 94 54
   FLAGS: UP LINK_UP INTERNET_DOWN DHCP_ENABLE ETHARP BROADCAST IGMP
   ip address: 192.168.31.135
   gw address: 192.168.31.1
   net mask : 255.255.255.0
   dns server #0: 192.168.31.1
   dns server #1: 10.1.8.12
5. xiangxistu commented on Feb 24, 2021

   

   xiangxistu

   on Feb 24, 2021

   Last edited by xiangxistu

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   Thanks for your help, i think this reason is the length of name is different between lwip and rt-thread.
   the length for lwip netif's name is 2, but rt-thread is 8.

   ---

   Can you help me to verify my guess?

   rt_strncmp(netdev->name, **name**, rt_strlen(netdev->name)

   Please show the origin data of 'name' parameter.
   I think for the network interface device'e0', the origin data will be e00···. For the 'e1', the origin data will be e11···.
6. xiangxistu commented on Feb 24, 2021

   

   xiangxistu

   on Feb 24, 2021

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   OK, Thanks for your help. We have find the final reason.
   We will fix the bug, thanks.

   👍React with 👍1Reacted by Wayne
7. mysterywolf

   closed this as completedon Feb 26, 2021