static enum ofperr
nx_pull_raw(const uint8_t *p, unsigned int match_len, bool strict,
struct match *match, ovs_be64 *cookie, ovs_be64 *cookie_mask)
{
uint32_t header;
ovs_assert((cookie != NULL) == (cookie_mask != NULL));
match_init_catchall(match);
if (cookie) {
*cookie = *cookie_mask = htonll(0);
}
if (!match_len) {
return 0;
}
for (;
(header = nx_entry_ok(p, match_len)) != 0;
p += 4 + NXM_LENGTH(header), match_len -= 4 + NXM_LENGTH(header)) {
const struct mf_field *mf;
enum ofperr error;
mf = mf_from_nxm_header(header);
if (!mf) {
if (strict) {
error = OFPERR_OFPBMC_BAD_FIELD;
} else {
continue;
}
} else if (!mf_are_prereqs_ok(mf, &match->flow)) {
error = OFPERR_OFPBMC_BAD_PREREQ;
} else if (!mf_is_all_wild(mf, &match->wc)) {
error = OFPERR_OFPBMC_DUP_FIELD;
} else {
unsigned int width = mf->n_bytes;
union mf_value value;
memcpy(&value, p + 4, width);
if (!mf_is_value_valid(mf, &value)) {
error = OFPERR_OFPBMC_BAD_VALUE;
} else if (!NXM_HASMASK(header)) {
error = 0;
mf_set_value(mf, &value, match);
} else {
union mf_value mask;
memcpy(&mask, p + 4 + width, width);
if (!mf_is_mask_valid(mf, &mask)) {
error = OFPERR_OFPBMC_BAD_MASK;
} else {
error = check_mask_consistency(p, mf);
if (!error) {
mf_set(mf, &value, &mask, match);
}
}
}
}
/* Check if the match is for a cookie rather than a classifier rule. */
if ((header == NXM_NX_COOKIE || header == NXM_NX_COOKIE_W) && cookie) {
if (*cookie_mask) {
error = OFPERR_OFPBMC_DUP_FIELD;
} else {
unsigned int width = sizeof *cookie;
memcpy(cookie, p + 4, width);
if (NXM_HASMASK(header)) {
memcpy(cookie_mask, p + 4 + width, width);
} else {
*cookie_mask = OVS_BE64_MAX;
}
error = 0;
}
}
if (error) {
VLOG_DBG_RL(&rl, "bad nxm_entry %#08"PRIx32" (vendor=%"PRIu32", "
"field=%"PRIu32", hasmask=%"PRIu32", len=%"PRIu32"), "
"(%s)", header,
NXM_VENDOR(header), NXM_FIELD(header),
NXM_HASMASK(header), NXM_LENGTH(header),
ofperr_to_string(error));
return error;
}
}
return match_len ? OFPERR_OFPBMC_BAD_LEN : 0;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
static char * OVS_WARN_UNUSED_RESULT
learn_parse_spec(const char *orig, char *name, char *value,
struct ofpact_learn_spec *spec,
struct ofpbuf *ofpacts, struct match *match)
{
if (mf_from_name(name)) {
const struct mf_field *dst = mf_from_name(name);
union mf_value imm;
char *error;
error = mf_parse_value(dst, value, &imm);
if (error) {
return error;
}
spec->n_bits = dst->n_bits;
spec->src_type = NX_LEARN_SRC_IMMEDIATE;
spec->dst_type = NX_LEARN_DST_MATCH;
spec->dst.field = dst;
spec->dst.ofs = 0;
spec->dst.n_bits = dst->n_bits;
/* Update 'match' to allow for satisfying destination
* prerequisites. */
mf_set_value(dst, &imm, match, NULL);
/* Push value last, as this may reallocate 'spec'! */
uint8_t *src_imm = ofpbuf_put_zeros(ofpacts,
OFPACT_ALIGN(dst->n_bytes));
memcpy(src_imm, &imm, dst->n_bytes);
} else if (strchr(name, '[')) {
/* Parse destination and check prerequisites. */
char *error;
error = mf_parse_subfield(&spec->dst, name);
if (error) {
return error;
}
if (!mf_nxm_header(spec->dst.field->id)) {
return xasprintf("%s: experimenter OXM field '%s' not supported",
orig, name);
}
/* Parse source and check prerequisites. */
if (value[0] != '\0') {
error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
if (spec->src.n_bits != spec->dst.n_bits) {
return xasprintf("%s: bit widths of %s (%u) and %s (%u) "
"differ", orig, name, spec->src.n_bits, value,
spec->dst.n_bits);
}
} else {
spec->src = spec->dst;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_MATCH;
} else if (!strcmp(name, "load")) {
if (value[strcspn(value, "[-")] == '-') {
char *error = learn_parse_load_immediate(value, spec, ofpacts);
if (error) {
return error;
}
} else {
struct ofpact_reg_move move;
char *error;
error = nxm_parse_reg_move(&move, value);
if (error) {
return error;
}
spec->n_bits = move.src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->src = move.src;
spec->dst_type = NX_LEARN_DST_LOAD;
spec->dst = move.dst;
}
} else if (!strcmp(name, "output")) {
char *error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_OUTPUT;
} else {
return xasprintf("%s: unknown keyword %s", orig, name);
}
return NULL;
}
