Add Large Forward Open service

[nefethael]

Signed-off-by: Vincent Prince vincent.prince.fr@gmail.com

[nefethael]

Hi all,

This is my first contribution to EIPScanner, I'm not sure my PR takes care of everything (examples, doc, etc)?

Also, I only tried LFO feature with OpENer stack and wireshark (I don't own any CIP adapter equipment), so I'm not 100% confident about implementation.

First commit allows output assembly to change data without vector copy, maybe a better solution would be to provide something like this in IOConnection? Current solution is not threadsafe.

using SendDataHandle = std::function<std::vector<uint8_t>&(void)>;

Second commit allows creation of ConnectionManager object as another class member without causing a timeout on first forward open.

Last commit adds large forward open service and provides a new NetworkConnectionParametersBuilder class that takes care of serializing/deserializing network connection parameters. It can be used this way

        ConnectionManager connectionManager;

        ConnectionParameters parameters;
        parameters.connectionPath = {0x20, 0x04,0x24, 151, 0x2C, 150, 0x2C, 100};
        parameters.o2tRealTimeFormat = true;
        parameters.originatorVendorId = 342;
        parameters.originatorSerialNumber = 32423;

        parameters.t2oNetworkConnectionParams =
                NetworkConnectionParametersBuilder(0, true)
                .SetConnectionType(NetworkConnectionParametersBuilder::P2P)
                .SetPriority(NetworkConnectionParametersBuilder::SCHEDULED)
                .SetConnectionSize(32).Build();

        parameters.o2tNetworkConnectionParams =
                NetworkConnectionParametersBuilder(0, true)
                .SetConnectionType(NetworkConnectionParametersBuilder::P2P)
                .SetPriority(NetworkConnectionParametersBuilder::SCHEDULED)
                .SetConnectionSize(32).Build();

        parameters.originatorSerialNumber = 0x12345;
        parameters.o2tRPI = 1000000;
        parameters.t2oRPI = 1000000;
        parameters.transportTypeTrigger |= NetworkConnectionParams::CLASS1;

        auto io = connectionManager.largeForwardOpen(si, parameters);
        ...

I'm open to any remarks & suggestions

Best regards, Vincent

[atimin]

Hey @nefethael , thank you for the contribution.

We appreciate your help and we are open to work here together. Unfortunately, I'm pretty busy at the moment and cannot make the code review in details. I'll give you my feedback at the weekend.

Best regards, Aleksey

[nefethael]

@flipback I rebased PR branch with corrections. I just reverted setDataToSend stuff without any workaround for 0-copy vector, they're not that big regarding send period :)

[atimin]

Hi @nefethael, thanks I see. What about other two topics?: 1) LOG_TRACE 2) Code conversion

[nefethael]

@flipback I removed LOG_TRACE in notify function and fixed upper/lower-case issues, normally it should be ok

[atimin]

@nefethael I didn't notice it because I was waiting for an additional commit =) Okay, I'll take your PR. Thank you very much for your contribution again!