[ifconfig] Wrong networking interface information issue.

[wosayttn]

Hi,

I use ifconfig command to list dual-ethernet interfaces as below, but dump information is incorrect.

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: DOWN LINK_DOWN INTERNET_DOWN DHCP_ENABLE
ip address: 0.0.0.0
gw address: 0.0.0.0
net mask : 0.0.0.0
dns server #0: 0.0.0.0
dns server #1: 0.0.0.0
msh />
msh />ping 192.168.31.1
dhcp_arp_reply()
60 bytes from 192.168.31.1 icmp_seq=0 ttl=64 time=1 ms
60 bytes from 192.168.31.1 icmp_seq=1 ttl=64 time=0 ms
60 bytes from 192.168.31.1 icmp_seq=2 ttl=64 time=0 ms
60 bytes from 192.168.31.1 icmp_seq=3 ttl=64 time=0 ms
msh />
msh />ping 192.168.1.1
60 bytes from 192.168.1.1 icmp_seq=0 ttl=64 time=1 ms
60 bytes from 192.168.1.1 icmp_seq=1 ttl=64 time=0 ms
60 bytes from 192.168.1.1 icmp_seq=2 ttl=64 time=0 ms
60 bytes from 192.168.1.1 icmp_seq=3 ttl=64 time=0 ms
msh />

[Guozhanxin]

@xiangxistu please take a look, thanks!

[xiangxistu]

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.

[wosayttn]

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

[xiangxistu]

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···.

[xiangxistu]

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