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netdev_tap: make 'wired' property configurable #17709

Merged
merged 3 commits into from
Jun 1, 2022
Merged

netdev_tap: make 'wired' property configurable #17709

merged 3 commits into from
Jun 1, 2022

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benpicco
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@benpicco benpicco commented Feb 25, 2022 •
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Contribution description

netdev_tap is a virtual interface, make it possible to simulate both a wired and a wireless interface.

Testing procedure

$ bin/native/gnrc_networking.elf tap0

Iface  6  HWaddr: 7A:37:FC:7D:1A:AF 
          L2-PDU:1500  MTU:1500  HL:64  RTR  
          RTR_ADV  
          Source address length: 6
--->      Link type: wired
          inet6 addr: fe80::7837:fcff:fe7d:1aaf  scope: link  VAL
          inet6 group: ff02::2
          inet6 group: ff02::1
          inet6 group: ff02::1:ff7d:1aaf
          inet6 group: ff02::1a
          
          Statistics for Layer 2
            RX packets 4  bytes 480
            TX packets 1 (Multicast: 1)  bytes 78
            TX succeeded 1 errors 0
          Statistics for IPv6
            RX packets 4  bytes 424
            TX packets 1 (Multicast: 1)  bytes 64
            TX succeeded 1 errors 0

$ bin/native/gnrc_networking.elf -w tap0

Iface  6  HWaddr: 7A:37:FC:7D:1A:AF 
          L2-PDU:1500  MTU:1500  HL:64  RTR  
          RTR_ADV  
          Source address length: 6
--->      Link type: wireless
          inet6 addr: fe80::7837:fcff:fe7d:1aaf  scope: link  VAL
          inet6 group: ff02::2
          inet6 group: ff02::1
          inet6 group: ff02::1:ff7d:1aaf
          inet6 group: ff02::1a
          
          Statistics for Layer 2
            RX packets 4  bytes 480
            TX packets 1 (Multicast: 1)  bytes 78
            TX succeeded 1 errors 0
          Statistics for IPv6
            RX packets 4  bytes 424
            TX packets 1 (Multicast: 1)  bytes 64
            TX succeeded 1 errors 0


$ bin/native/gnrc_networking.elf -w tap0 tap1

Iface  7  HWaddr: 5A:B0:08:67:AD:82 
          L2-PDU:1500  MTU:1500  HL:64  RTR  
          RTR_ADV  
          Source address length: 6
          Link type: wired
          inet6 addr: fe80::58b0:8ff:fe67:ad82  scope: link  VAL
          inet6 group: ff02::2
          inet6 group: ff02::1
          inet6 group: ff02::1:ff67:ad82
          
          Statistics for Layer 2
            RX packets 5  bytes 526
            TX packets 1 (Multicast: 1)  bytes 78
            TX succeeded 1 errors 0
          Statistics for IPv6
            RX packets 5  bytes 456
            TX packets 1 (Multicast: 1)  bytes 64
            TX succeeded 1 errors 0

Iface  6  HWaddr: 7A:37:FC:7D:1A:AF 
          L2-PDU:1500  MTU:1500  HL:64  RTR  
          RTR_ADV  
          Source address length: 6
          Link type: wireless
          inet6 addr: fe80::7837:fcff:fe7d:1aaf  scope: link  VAL
          inet6 group: ff02::2
          inet6 group: ff02::1
          inet6 group: ff02::1:ff7d:1aaf
          
          Statistics for Layer 2
            RX packets 4  bytes 480
            TX packets 1 (Multicast: 1)  bytes 78
            TX succeeded 1 errors 0
          Statistics for IPv6
            RX packets 4  bytes 424
            TX packets 1 (Multicast: 1)  bytes 64
            TX succeeded 1 errors 0

LWIP

$  bin/native/paho-mqtt-example.elf -w tap0 tap1

Iface ET0 HWaddr: 7a:37:fc:7d:1a:af Link: up State: up
        Link type: wireless
        inet6 addr: fe80:0:0:0:7837:fcff:fe7d:1aaf scope: link
Iface ET1 HWaddr: 5a:b0:08:67:ad:82 Link: up State: up
        Link type: wired
        inet6 addr: fe80:0:0:0:58b0:8ff:fe67:ad82 scope: link

Issues/PRs references

#17350 (comment)

@github-actions github-actions bot added Area: cpu Area: CPU/MCU ports Platform: native Platform: This PR/issue effects the native platform labels Feb 25, 2022
@benpicco benpicco requested a review from miri64 February 25, 2022 16:22
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miri64 commented Feb 25, 2022

Wouldn't it make more sense to make this compile-time configurable? Also: before we do this, can we consider, if this is actually nececessary? See #17350 (comment)

@benpicco
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I thought maybe you want to have a wired and a wireless interface 🤷‍♂️
But I can add a netdev_tap_wireless pseudo-module instead

@miri64
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miri64 commented Feb 25, 2022

I thought maybe you want to have a wired and a wireless interface man_shrugging

Right, that makes sense! But you could also do that in native_tap_params_t, right?

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miri64 commented Feb 25, 2022

But I can add a netdev_tap_wireless pseudo-module instead

I'd rather go with a Kconfig switch, a pseudo-module seems a bit overkill IMHO.

@benpicco
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benpicco commented Feb 26, 2022 •
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Let's make it a command-line argument, that also sorts out the issue of which interface should be 'wireless'.

@github-actions github-actions bot added Area: network Area: Networking Area: pkg Area: External package ports Area: sys Area: System labels Feb 26, 2022
@benpicco benpicco added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Feb 28, 2022
@benpicco benpicco requested a review from aabadie March 22, 2022 20:00
@benpicco benpicco mentioned this pull request Mar 29, 2022
Merged
@benpicco benpicco requested a review from kfessel May 16, 2022 22:29
@benpicco benpicco added Type: cleanup The issue proposes a clean-up / The PR cleans-up parts of the codebase / documentation and removed Type: cleanup The issue proposes a clean-up / The PR cleans-up parts of the codebase / documentation labels May 29, 2022
@benpicco benpicco added the Type: enhancement The issue suggests enhanceable parts / The PR enhances parts of the codebase / documentation label May 29, 2022
miri64
miri64 approved these changes May 31, 2022
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ACK. Tested. Might also help with future testing, as now the tap interface becomes basically optional.

@miri64 miri64 added CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR and removed CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR labels May 31, 2022
@miri64 miri64 enabled auto-merge May 31, 2022 17:25
@miri64 miri64 merged commit c4e202a into RIOT-OS:master Jun 1, 2022
@benpicco benpicco deleted the cpu/native-tap_wired branch June 1, 2022 07:14
@miri64 miri64 mentioned this pull request Jun 2, 2022
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@chrysn chrysn added this to the Release 2022.07 milestone Aug 25, 2022
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Area: cpu Area: CPU/MCU ports Area: network Area: Networking Area: pkg Area: External package ports Area: sys Area: System CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR Platform: native Platform: This PR/issue effects the native platform Type: enhancement The issue suggests enhanceable parts / The PR enhances parts of the codebase / documentation
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