CREDS_VALUE
oa->data[0].option.data = CREDS_VALUE;
oa->data[0].option.len = sizeof(CREDS_VALUE);
if (length == sizeof(CREDS_VALUE) &&
memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) {
opt.value.data = CREDS_VALUE;
opt.value.len = sizeof(CREDS_VALUE);
8 + sizeof(CREDS_OPTION) + sizeof(CREDS_VALUE))