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[嵌入式linux]将linux板卡虚拟为USB网卡设备（Ethernet Gadget）_enp0s20f0u1u6是什么网卡

作者：码创造者 | 2024-08-17 06:43:27

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enp0s20f0u1u6是什么网卡

 

kernel menuconfig

  • -> Device Drivers ->USB support -> USB Gadget Support
  • 建议最好选成M，作为内核驱动模块，便于与其他Gadget驱动共存
  1. <M>   USB Gadget Drivers 
  2.  
  3. <M>     Ethernet Gadget (with CDC Ethernet support)
  4.  
  5. [*]       RNDIS support
  • 更新uImage和rootfs

 

启动linux，加载g_ether驱动

  1. # modprobe g_ether
  2. [  318.955068] using random self ethernet address
  3. [  318.959586] using random host ethernet address
  4. [  318.964711] usb0: HOST MAC 9e:cd:8c:e2:e1:63
  5. [  318.969052] usb0: MAC ba:ae:51:91:76:54
  6. [  318.972924] using random self ethernet address
  7. [  318.977379] using random host ethernet address
  8. [  318.981934] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
  9. [  318.988564] g_ether gadget: g_ether ready
  10. [  318.992590] dwc2 f6000000.usb_otg: bound driver g_ether

查看USB虚拟网卡：USB0就是

  1. # ifconfig
  2. eth0      Link encap:Ethernet  HWaddr 02:67:AB:81:02:BB
  3.           UP BROADCAST MULTICAST  MTU:1500  Metric:1
  4.           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  5.           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  6.           collisions:0 txqueuelen:1000
  7.           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  8.           Interrupt:16 Base address:0x1000
  9.  
  10. lo        Link encap:Local Loopback
  11.           inet addr:127.0.0.1  Mask:255.0.0.0
  12.           UP LOOPBACK RUNNING  MTU:65536  Metric:1
  13.           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  14.           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  15.           collisions:0 txqueuelen:1
  16.           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  17.  
  18. usb0      Link encap:Ethernet  HWaddr BA:AE:51:91:76:54
  19.           inet addr:169.254.169.223  Bcast:169.254.255.255  Mask:255.255.0.0
  20.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  21.           RX packets:25 errors:0 dropped:21 overruns:0 frame:0
  22.           TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
  23.           collisions:0 txqueuelen:1000
  24.           RX bytes:4369 (4.2 KiB)  TX bytes:1598 (1.5 KiB)

用USB线连接PC机，配置IP

  • Windows系统的PC机需安装RNDIS虚拟网卡驱动（下面PC是用的ubuntu）
  • PC识别成功后会出现新的网卡设备
  • 配置PC和板卡两端IP为同一网段

enp0s20f0u10 为PC识别到的USB网卡设备：

  1. OptiPlex-3050:~$ ifconfig
  2. enp0s20f0u10 Link encap:Ethernet  HWaddr 9e:cd:8c:e2:e1:63
  3.           inet addr:10.42.0.1  Bcast:10.42.0.255  Mask:255.255.255.0
  4.           inet6 addr: fe80::b0a1:e9ef:39b5:a0b5/64 Scope:Link
  5.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  6.           RX packets:155598 errors:0 dropped:2 overruns:0 frame:0
  7.           TX packets:77909 errors:0 dropped:0 overruns:0 carrier:0
  8.           collisions:0 txqueuelen:1000
  9.           RX bytes:233303187 (233.3 MB)  TX bytes:5155821 (5.1 MB)
  10.  
  11. enp1s0    Link encap:Ethernet  HWaddr e4:54:e8:9b:55:23
  12.           inet addr:10.10.46.239  Bcast:10.10.47.255  Mask:255.255.254.0
  13.           inet6 addr: fe80::73c5:dab2:c7c0:8fb6/64 Scope:Link
  14.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  15.           RX packets:112393 errors:0 dropped:4 overruns:0 frame:0
  16.           TX packets:12121 errors:0 dropped:0 overruns:0 carrier:0
  17.           collisions:0 txqueuelen:1000
  18.           RX bytes:34254996 (34.2 MB)  TX bytes:939336 (939.3 KB)
  19.  
  20. lo        Link encap:Local Loopback
  21.           inet addr:127.0.0.1  Mask:255.0.0.0
  22.           inet6 addr: ::1/128 Scope:Host
  23.           UP LOOPBACK RUNNING  MTU:65536  Metric:1
  24.           RX packets:67007 errors:0 dropped:0 overruns:0 frame:0
  25.           TX packets:67007 errors:0 dropped:0 overruns:0 carrier:0
  26.           collisions:0 txqueuelen:1000
  27.           RX bytes:4993833 (4.9 MB)  TX bytes:4993833 (4.9 MB)

设置同一网段，测试ping：

  1. # ifconfig usb0 10.42.0.2
  2. #
  3. #
  4. #
  5. # ifconfig
  6. eth0      Link encap:Ethernet  HWaddr 02:67:AB:81:02:BB
  7.           UP BROADCAST MULTICAST  MTU:1500  Metric:1
  8.           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  9.           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  10.           collisions:0 txqueuelen:1000
  11.           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  12.           Interrupt:16 Base address:0x1000
  13.  
  14. lo        Link encap:Local Loopback
  15.           inet addr:127.0.0.1  Mask:255.0.0.0
  16.           UP LOOPBACK RUNNING  MTU:65536  Metric:1
  17.           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  18.           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  19.           collisions:0 txqueuelen:1
  20.           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  21.  
  22. usb0      Link encap:Ethernet  HWaddr BA:AE:51:91:76:54
  23.           inet addr:10.42.0.2  Bcast:10.255.255.255  Mask:255.0.0.0
  24.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  25.           RX packets:108 errors:0 dropped:65 overruns:0 frame:0
  26.           TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
  27.           collisions:0 txqueuelen:1000
  28.           RX bytes:17442 (17.0 KiB)  TX bytes:2898 (2.8 KiB)
  29.  
  30. # ping 10.42.0.1
  31. PING 10.42.0.1 (10.42.0.1): 56 data bytes
  32. 64 bytes from 10.42.0.1: seq=0 ttl=64 time=0.933 ms
  33. 64 bytes from 10.42.0.1: seq=1 ttl=64 time=0.520 ms
  34. 64 bytes from 10.42.0.1: seq=2 ttl=64 time=0.486 ms
  35. 64 bytes from 10.42.0.1: seq=3 ttl=64 time=0.472 ms
  36. 64 bytes from 10.42.0.1: seq=4 ttl=64 time=0.463 ms
  37. 64 bytes from 10.42.0.1: seq=5 ttl=64 time=0.456 ms
  38. 64 bytes from 10.42.0.1: seq=6 ttl=64 time=0.561 ms
  39. 64 bytes from 10.42.0.1: seq=7 ttl=64 time=0.465 ms

 

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