c - how set a final in a buffer putting a 0? -

i'm getting buffer of internet, think go buffer , find last character, have find character '\0'. there no '\0' in buffer.

how set final in buffer putting 0 force buffer behave string?

your question confusing. receiver must typically know sent server. , receiver must ensure receives all (you need similar receivall function) data sent.

after receives all data sent, depends inside data. maybe inside data null terminated string followed integer - job of receiver parse , interpret way.