Method process_query_dsc_dir

src/control.cc:1386–1421

}

bool control_conn_t::process_query_dsc_dir()
{
    // packet contains command byte, spare byte, and service handle
    constexpr int pkt_size = 2 + sizeof(handle_t);

    if (rbuf.get_length() < pkt_size) {
        chklen = pkt_size;
        return true;
    }

    bool spare_ok = (rbuf[1] == 0);
    handle_t handle;
    rbuf.extract(&handle, 2, sizeof(handle));
    rbuf.consume(pkt_size);
    chklen = 0;

    service_record *service = find_service_for_key(handle);
    if (service == nullptr || !spare_ok) {
        char nak_rep[] = { (char)cp_rply::NAK };
        return queue_packet(nak_rep, 1);
    }

    // Reply:
    // 1 byte packet type = cp_rply::SVCDSCDIR
    // 4 bytes (uint32_t) = directory length (no nul terminator)
    // N bytes            = directory (no nul)
    std::vector<char> reppkt;
    auto sdir_len = static_cast<uint32_t>(strlen(service->get_service_dsc_dir()));
    reppkt.resize(1 + sizeof(uint32_t) + sdir_len);  // packet type, dir length, dir
    reppkt[0] = (char)cp_rply::SVCDSCDIR;
    std::memcpy(&reppkt[1], &sdir_len, sizeof(sdir_len));
    std::memcpy(&reppkt[1 + sizeof(uint32_t)], service->get_service_dsc_dir(), sdir_len);

    if (!queue_packet(std::move(reppkt))) return false;
    return true;
}

// Get current directory and store it at the specified position in a vector. The specified
// position may be beyond the current length of the vector. A null terminator is *not* appended.