Something about function mg_connect

[hywing]

Can I connect a tcp url with function mg_connect?
mg_connect(&mgr, "tcp://0.0.0.0:1234", cb, &mgr);
I got error when I tried doing this
Connection created 1494a28 1 mongoose.c:403:mg_error 1 0xcc socket error Connection closed

[hywing]

It turns out to be the right url is tcp://localhost:1234 not tcp://0.0.0.0:1234

[scaprile]

Please follow the guidelines in the documentation, examples and tutorials available.
There is already an example on how to do what you want to do: https://mongoose.ws/documentation/tutorials/tcp/
Yours is a networking concepts problem. localhost means "resolve this address and use it", that is usually the loopback address; 0.0.0.0 means "this host in this network" and in a listener context means "listen in all interfaces". You can't, of course, try to connect to that address because there is no way to resolve that,