#include "openflow/nicira-ext.h"
#include "packets.h"
#include "shash.h"
+#include "tun-metadata.h"
#include "unaligned.h"
#include "util.h"
#include "openvswitch/vlog.h"
static int nxm_field(uint64_t header) { return (header >> 41) & 0x7f; }
static bool nxm_hasmask(uint64_t header) { return (header >> 40) & 1; }
static int nxm_length(uint64_t header) { return (header >> 32) & 0xff; }
+static uint64_t nxm_no_len(uint64_t header) { return header & 0xffffff80ffffffffULL; }
static bool
is_experimenter_oxm(uint64_t header)
enum ofp_version);
static void nx_put_header__(struct ofpbuf *, uint64_t header, bool masked);
+static void nx_put_header_len(struct ofpbuf *, enum mf_field_id field,
+ enum ofp_version version, bool masked,
+ size_t n_bytes);
/* Rate limit for nx_match parse errors. These always indicate a bug in the
* peer and so there's not much point in showing a lot of them. */
return OFPERR_OFPBMC_BAD_LEN;
}
+static void
+copy_entry_value(const struct mf_field *field, union mf_value *value,
+ const uint8_t *payload, int width)
+{
+ int copy_len;
+ void *copy_dst;
+
+ copy_dst = value;
+ copy_len = MIN(width, field ? field->n_bytes : sizeof *value);
+
+ if (field && field->variable_len) {
+ memset(value, 0, field->n_bytes);
+ copy_dst = &value->u8 + field->n_bytes - copy_len;
+ }
+
+ memcpy(copy_dst, payload, copy_len);
+}
+
static enum ofperr
nx_pull_entry__(struct ofpbuf *b, bool allow_cookie, uint64_t *header,
- const struct mf_field **field,
+ const struct mf_field **field_,
union mf_value *value, union mf_value *mask)
{
+ const struct mf_field *field;
enum ofperr header_error;
unsigned int payload_len;
const uint8_t *payload;
int width;
- header_error = nx_pull_header__(b, allow_cookie, header, field);
+ header_error = nx_pull_header__(b, allow_cookie, header, &field);
if (header_error && header_error != OFPERR_OFPBMC_BAD_FIELD) {
return header_error;
}
return OFPERR_OFPBMC_BAD_WILDCARDS;
}
- memcpy(value, payload, MIN(width, sizeof *value));
+ copy_entry_value(field, value, payload, width);
+
if (mask) {
if (nxm_hasmask(*header)) {
- memcpy(mask, payload + width, MIN(width, sizeof *mask));
+ copy_entry_value(field, mask, payload + width, width);
} else {
- memset(mask, 0xff, MIN(width, sizeof *mask));
+ memset(mask, 0xff, sizeof *mask);
}
} else if (nxm_hasmask(*header)) {
VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" includes mask but "
return OFPERR_OFPBMC_BAD_MASK;
}
- return header_error;
+ if (field_) {
+ *field_ = field;
+ return header_error;
+ }
+
+ return 0;
}
/* Attempts to pull an NXM or OXM header, value, and mask (if present) from the
nxm_put_unmasked(struct ofpbuf *b, enum mf_field_id field,
enum ofp_version version, const void *value, size_t n_bytes)
{
- nx_put_header(b, field, version, false);
+ nx_put_header_len(b, field, version, false, n_bytes);
ofpbuf_put(b, value, n_bytes);
}
-static void
+void
nxm_put(struct ofpbuf *b, enum mf_field_id field, enum ofp_version version,
const void *value, const void *mask, size_t n_bytes)
{
if (!is_all_zeros(mask, n_bytes)) {
bool masked = !is_all_ones(mask, n_bytes);
- nx_put_header(b, field, version, masked);
+ nx_put_header_len(b, field, version, masked, n_bytes);
ofpbuf_put(b, value, n_bytes);
if (masked) {
ofpbuf_put(b, mask, n_bytes);
int match_len;
int i;
- BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 32);
/* Metadata. */
if (match->wc.masks.dp_hash) {
flow->tunnel.gbp_id, match->wc.masks.tunnel.gbp_id);
nxm_put_8m(b, MFF_TUN_GBP_FLAGS, oxm,
flow->tunnel.gbp_flags, match->wc.masks.tunnel.gbp_flags);
+ tun_metadata_to_nx_match(b, oxm, match);
/* Registers. */
if (oxm < OFP15_VERSION) {
int i;
/* Field arrays are only used with the group selection method
- * property and group properties are only available in OpenFlow * 1.5+.
+ * property and group properties are only available in OpenFlow 1.5+.
* So the following assertion should never fail.
*
* If support for older OpenFlow versions is desired then some care
for (i = 0; i < MFF_N_IDS; i++) {
if (bitmap_is_set(fa->used.bm, i)) {
- nxm_put_unmasked(b, i, version, &fa->value[i],
- mf_from_id(i)->n_bytes);
+ int len = mf_field_len(mf_from_id(i), &fa->value[i], NULL);
+ nxm_put_unmasked(b, i, version,
+ &fa->value[i].u8 + mf_from_id(i)->n_bytes - len,
+ len);
}
}
nx_put_header__(b, mf_oxm_header(field, version), masked);
}
+static void
+nx_put_header_len(struct ofpbuf *b, enum mf_field_id field,
+ enum ofp_version version, bool masked, size_t n_bytes)
+{
+ uint64_t header = mf_oxm_header(field, version);
+
+ header = NXM_HEADER(nxm_vendor(header), nxm_class(header),
+ nxm_field(header), false,
+ nxm_experimenter_len(header) + n_bytes);
+
+ nx_put_header__(b, header, masked);
+}
+
void
nx_put_entry(struct ofpbuf *b,
enum mf_field_id field, enum ofp_version version,
const union mf_value *value, const union mf_value *mask)
{
- int n_bytes = mf_from_id(field)->n_bytes;
- bool masked = mask && !is_all_ones(mask, n_bytes);
+ const struct mf_field *mf = mf_from_id(field);
+ bool masked = mask && !is_all_ones(mask, mf->n_bytes);
+ int len, offset;
- nx_put_header(b, field, version, masked);
- ofpbuf_put(b, value, n_bytes);
+ len = mf_field_len(mf, value, mask);
+ offset = mf->n_bytes - len;
+
+ nx_put_header_len(b, field, version, masked, len);
+ ofpbuf_put(b, &value->u8 + offset, len);
if (masked) {
- ofpbuf_put(b, mask, n_bytes);
+ ofpbuf_put(b, &mask->u8 + offset, len);
}
}
\f
for (s += strspn(s, ", "); *s; s += strspn(s, ", ")) {
const char *name;
uint64_t header;
+ ovs_be64 nw_header;
+ ovs_be64 *header_ptr;
int name_len;
size_t n;
s += name_len + 1;
- nx_put_header__(b, header, false);
+ header_ptr = ofpbuf_put_uninit(b, nxm_header_len(header));
s = ofpbuf_put_hex(b, s, &n);
if (n != nxm_field_bytes(header)) {
- ovs_fatal(0, "%.2s: hex digits expected", s);
+ const struct mf_field *field = mf_from_oxm_header(header);
+
+ if (field && field->variable_len) {
+ if (n <= field->n_bytes) {
+ int len = (nxm_hasmask(header) ? n * 2 : n) +
+ nxm_experimenter_len(header);
+
+ header = NXM_HEADER(nxm_vendor(header), nxm_class(header),
+ nxm_field(header),
+ nxm_hasmask(header) ? 1 : 0, len);
+ } else {
+ ovs_fatal(0, "expected to read at most %d bytes but got "
+ "%"PRIuSIZE, field->n_bytes, n);
+ }
+ } else {
+ ovs_fatal(0, "expected to read %d bytes but got %"PRIuSIZE,
+ nxm_field_bytes(header), n);
+ }
}
+ nw_header = htonll(header);
+ memcpy(header_ptr, &nw_header, nxm_header_len(header));
+
if (nxm_hasmask(header)) {
s += strspn(s, " ");
if (*s != '/') {
for (struct nxm_field_index *nfi = all_nxm_fields;
nfi < &all_nxm_fields[ARRAY_SIZE(all_nxm_fields)]; nfi++) {
hmap_insert(&nxm_header_map, &nfi->header_node,
- hash_uint64(nfi->nf.header));
+ hash_uint64(nxm_no_len(nfi->nf.header)));
hmap_insert(&nxm_name_map, &nfi->name_node,
hash_string(nfi->nf.name, 0));
list_push_back(&nxm_mf_map[nfi->nf.id], &nfi->mf_node);
nxm_field_by_header(uint64_t header)
{
const struct nxm_field_index *nfi;
+ uint64_t header_no_len;
nxm_init();
if (nxm_hasmask(header)) {
header = nxm_make_exact_header(header);
}
- HMAP_FOR_EACH_IN_BUCKET (nfi, header_node, hash_uint64(header),
+ header_no_len = nxm_no_len(header);
+
+ HMAP_FOR_EACH_IN_BUCKET (nfi, header_node, hash_uint64(header_no_len),
&nxm_header_map) {
- if (header == nfi->nf.header) {
- return &nfi->nf;
+ if (header_no_len == nxm_no_len(nfi->nf.header)) {
+ if (nxm_length(header) == nxm_length(nfi->nf.header) ||
+ mf_from_id(nfi->nf.id)->variable_len) {
+ return &nfi->nf;
+ } else {
+ return NULL;
+ }
}
}
return NULL;
projects / cascardo / ovs.git / blobdiff