Add MPTCP Support

[pgagne]

Hello,

Recently MPTCP configuration was added to iproute2.

https://man7.org/linux/man-pages/man8/ip-mptcp.8.html

It would be useful to have this in pyroute2.

Please let me know if there is anything I can do to help with this.

[svinota]

Thanks for heads-up!

[svinota]

@pgagne basic endpoint management has been added: db1c48e

Limits support and flags will be done this weekend.

[svinota]

Limits support has been added: 4e194b9

Corresponding tests are to be added asap.

[svinota]

@pgagne I believe the mptcp support is more or less tolerable. Please let me know if you miss something.

[pgagne]

Thanks @svinota I'll take a look and let you know.

[pgagne]

@svinota is there support to set the endpoint flags when adding the endpoint (ie signal, subflow, backup), the equivalent of

ip mptcp endpoint add <addr> subflow

[pgagne]

I think i figure out how to set the endpoint flags,

class MPTCPFlags(IntFlag):
    # via https://github.com/torvalds/linux/blob/9d31d2338950293ec19d9b095fbaa9030899dcb4/include/uapi/linux/mptcp.h#L73
    MPTCP_PM_ADDR_FLAG_SIGNAL = (1 << 0)
    MPTCP_PM_ADDR_FLAG_SUBFLOW = (1 << 1)
    MPTCP_PM_ADDR_FLAG_BACKUP = (1 << 2)

mptcp.endpoint("add", addr=str(ip), flags=MPTCPFlags.MPTCP_PM_ADDR_FLAG_SUBFLOW)

this will work for me for now.

[Kuba314]

Hi, is there a way to do an equivalent of ip mptcp add ADDRESS dev NAME?