TCP Client not connecting

Question

Hi, I am working on a device with the W6100 chip and having some issues with connecting to a TCP Client. I have followed the documenation directly https://wizwiki.net/wiki/lib/exe/fetch.php/products:w6100:w6100_ds_v104e.pdf and nothing was happening, then I found some examples for W5500 that showed that you have to run OPEN command after setting the destination address and port. Then something start working, I got some messages in wireshark: But it still doesn’t stay connected, on the server side I am using just plain nc and it throws an error: Listening on 0.0.0.0 5000 nc: accept: Software caused connection abort I am missing something after doing connect? struct eth_socket_mode mode = { .multi = 0, .broadcast = 0, .noackdelay = 0, .unicast = 0, .protocol = ETH_SOCKET_MODE_PROTOCOL_TCP4, }; ETH_WRITE_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_MODE, &mode, sizeof(mode)); ETH_WRITE_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_DEST4, &parsed_ip, sizeof(parsed_ip)); ETH_WRITE_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_PORT, &parsed_port, sizeof(parsed_port)); uint8_t command = ETH_SOCKET_COMMAND_OPEN; ETH_WRITE_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_COMMAND, &command, sizeof(command)); uint64_t start = tools_get_current_ms(); do { msleep(5); ETH_READ_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_COMMAND, &command, sizeof(command)); _info("command: %d ", command); } while (command != 0 && tools_get_current_ms() - start < priv->timeout); command = ETH_SOCKET_COMMAND_CONNECT; ETH_WRITE_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_COMMAND, &command, sizeof(command)); start = tools_get_current_ms(); do { msleep(5); ETH_READ_SOCKET_CONF(priv->dev, priv->number, ETH_SOCKET_COMMAND, &command, sizeof(command)); _info("command: %d ", command); } while (command != 0 && tools_get_current_ms() - start < priv->timeout); Here is my code for opening TCP Connection. Any one can help me with that?

becky · Answer

I don’t understand your environment well. Is the w6100 a TCP server? First of all, TCP Client’s port is 0 when viewed through wireshark. This seems to be a problem.

mateusz · Answer

Ok I found it out! Thanks for the suggestion that the port is 0. I tried to set 0x0114 to 14001 and now it opens. Sadly that isn’t mention in the documentation but important that it works now :).