data_length, bytes_to_shift);
memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
csp->client_iob->cur = csp->client_iob->buf;
data_length, bytes_to_shift);
memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
csp->client_iob->cur = csp->client_iob->buf;