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README: clarify.

v0.7.x
whitequark 2016-12-13 12:31:33 +00:00
parent d587981ef5
commit 9eb28ed6d7
1 changed files with 9 additions and 5 deletions
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README.md
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@ -17,9 +17,9 @@ features are listed.
The only supported medium is Ethernet.
* Regular 802.3 frames are supported.
* Regular Ethernet II frames are supported.
* ARP packets (including gratuitous requests and replies) are supported.
* 802.1Q is **not** supported.
* 802.3 and 802.1Q is **not** supported.
* Jumbo frames are **not** supported.
* Frame check sequence calculation is **not** supported.
@ -55,9 +55,13 @@ smoltcp = "0.1"
Usage example
-------------
_smoltcp_, being a userspace networking stack, needs to be able to send and receive raw frames.
This normally requires superuser privileges, but on Linux it is possible to create
a _persistent tap interface_ that can be manipulated by a specific user:
_smoltcp_, being a freestanding networking stack, needs to be able to transmit and receive
raw frames. For testing purposes, we will use a regular OS, and run _smoltcp_ in
a userspace process. Only Linux is supported (right now).
On *nix OSes, transmiting and receiving raw frames normally requires superuser privileges, but
on Linux it is possible to create a _persistent tap interface_ that can be manipulated by
a specific user:
```sh
sudo ip tuntap add name tap0 mode tap user $USER