/* Given NXM/OXM value 'value' and mask 'mask', each 'width' bytes long, checks
* for any 1-bit in the value where there is a 0-bit in the mask. Returns 0 if
* none, otherwise an error code. */
static enum ofperr
check_mask_consistency(const uint8_t *p, const struct mf_field *mf)
{
unsigned int width = mf->n_bytes;
const uint8_t *value = p + 4;
const uint8_t *mask = p + 4 + width;
unsigned int i;
for (i = 0; i < width; i++) {
if (value[i] & ~mask[i]) {
if (!VLOG_DROP_WARN(&rl)) {
char *s = nx_match_to_string(p, width * 2 + 4);
VLOG_WARN_RL(&rl, "Rejecting NXM/OXM entry %s with 1-bits in "
"value for bits wildcarded by the mask.", s);
free(s);
}
return OFPERR_OFPBMC_BAD_WILDCARDS;
}
}
return 0;
}
/* Given NXM/OXM value 'value' and mask 'mask', each 'width' bytes long,
* checks for any 1-bit in the value where there is a 0-bit in the mask. If it
* finds one, logs a warning. */
static void
check_mask_consistency(const uint8_t *p, const struct mf_field *mf)
{
unsigned int width = mf->n_bytes;
const uint8_t *value = p + 4;
const uint8_t *mask = p + 4 + width;
unsigned int i;
for (i = 0; i < width; i++) {
if (value[i] & ~mask[i]) {
if (!VLOG_DROP_WARN(&rl)) {
char *s = nx_match_to_string(p, width * 2 + 4);
VLOG_WARN_RL(&rl, "NXM/OXM entry %s has 1-bits in value for "
"bits wildcarded by the mask. (Future versions "
"of OVS may report this as an OpenFlow error.)",
s);
break;
}
}
}
}