Client -> Server Communication

There is no singular function that is responsible for this task. In Apex, we rather have multiple of those working together. 

Let's get started with the most common function, R5AC::PushViolation:

void __fastcall R5AC::PushViolation(
        const __m128i *pszIdentifierStr,
        char Severity,
        __int64 ExtraDataPtr,
        __int64 ExtraDataLen);

// When it doesn't like something, it'll end up somewhere like this:

LABEL_125:
              v119 = v116();
              v120 = 0;
              v121 = 0i64;
              do
              {
                v122 = *(_BYTE *)(v121 + 41489128);
                ++v120;
                v123 = *(_BYTE *)(v121 + 27928337);
                v188[++v121 + 15] = v123 ^ v122;
              }
              while ( v120 < 0xC );
              sprintf_s_2(Buffer, 0x104ui64, Format, v119);
            }
          }
          R5AC::PushViolation(v200, 1, v177, (__int64)Buffer);