#include <netinet/icmp6.h>
#include <stdlib.h>
#include "autopath.h"
+#include "bundle.h"
#include "byte-order.h"
#include "classifier.h"
#include "dynamic-string.h"
}
/* Given the IP netmask 'netmask', returns the number of bits of the IP address
- * that it wildcards. 'netmask' must be a CIDR netmask (see ip_is_cidr()). */
+ * that it wildcards, that is, the number of 0-bits in 'netmask'. 'netmask'
+ * must be a CIDR netmask (see ip_is_cidr()). */
int
ofputil_netmask_to_wcbits(ovs_be32 netmask)
{
- assert(ip_is_cidr(netmask));
-#if __GNUC__ >= 4
- return netmask == htonl(0) ? 32 : __builtin_ctz(ntohl(netmask));
-#else
- int wcbits;
-
- for (wcbits = 32; netmask; wcbits--) {
- netmask &= netmask - 1;
- }
-
- return wcbits;
-#endif
+ return 32 - ip_count_cidr_bits(netmask);
}
/* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and
/* Converts the wildcard in 'ofpfw' into a flow_wildcards in 'wc' for use in
* struct cls_rule. It is the caller's responsibility to handle the special
* case where the flow match's dl_vlan is set to OFP_VLAN_NONE. */
-static void
+void
ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc)
{
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
/* Initialize most of rule->wc. */
flow_wildcards_init_catchall(wc);
wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS;
{ OFPUTIL_NXT_FLOW_REMOVED,
NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED",
sizeof(struct nx_flow_removed), 8 },
+
+ { OFPUTIL_NXT_FLOW_MOD_TABLE_ID,
+ NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID",
+ sizeof(struct nxt_flow_mod_table_id), 0 },
};
static const struct ofputil_msg_category nxt_category = {
}
nh = (const struct nicira_header *) oh;
-
- if (nh->subtype == htonl(NXT_FLOW_MOD_TABLE_ID)
- && oh->length == htons(sizeof(struct nxt_flow_mod_table_id))) {
- /* NXT_SET_FLOW_FORMAT and NXT_FLOW_MOD_TABLE_ID accidentally have the
- * same value but different lengths. ofputil_lookup_openflow_message()
- * doesn't support this case, so special case it here. */
- static const struct ofputil_msg_type nxt_flow_mod_table_id =
- { OFPUTIL_NXT_FLOW_MOD_TABLE_ID,
- NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID",
- sizeof(struct nxt_flow_mod_table_id), 0 };
-
- *typep = &nxt_flow_mod_table_id;
- return 0;
- }
-
return ofputil_lookup_openflow_message(&nxt_category, ntohl(nh->subtype),
ntohs(oh->length), typep);
}
static int
check_nxstats_msg(const struct ofp_header *oh)
{
- const struct ofp_stats_request *osr;
+ const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh;
ovs_be32 vendor;
- osr = (const struct ofp_stats_request *) oh;
-
- memcpy(&vendor, osr->body, sizeof vendor);
+ memcpy(&vendor, osm + 1, sizeof vendor);
if (vendor != htonl(NX_VENDOR_ID)) {
VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for "
"unknown vendor %"PRIx32, ntohl(vendor));
return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
}
- if (ntohs(osr->header.length) < sizeof(struct nicira_stats_msg)) {
+ if (ntohs(osm->header.length) < sizeof(struct nicira_stats_msg)) {
VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message");
return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
ofputil_decode_ofpst_request(const struct ofp_header *oh,
const struct ofputil_msg_type **typep)
{
- enum { OSR_SIZE = sizeof(struct ofp_stats_request) };
static const struct ofputil_msg_type ofpst_requests[] = {
{ OFPUTIL_OFPST_DESC_REQUEST,
OFPST_DESC, "OFPST_DESC request",
- OSR_SIZE, 0 },
+ sizeof(struct ofp_stats_msg), 0 },
{ OFPUTIL_OFPST_FLOW_REQUEST,
OFPST_FLOW, "OFPST_FLOW request",
- OSR_SIZE + sizeof(struct ofp_flow_stats_request), 0 },
+ sizeof(struct ofp_flow_stats_request), 0 },
{ OFPUTIL_OFPST_AGGREGATE_REQUEST,
OFPST_AGGREGATE, "OFPST_AGGREGATE request",
- OSR_SIZE + sizeof(struct ofp_aggregate_stats_request), 0 },
+ sizeof(struct ofp_flow_stats_request), 0 },
{ OFPUTIL_OFPST_TABLE_REQUEST,
OFPST_TABLE, "OFPST_TABLE request",
- OSR_SIZE, 0 },
+ sizeof(struct ofp_stats_msg), 0 },
{ OFPUTIL_OFPST_PORT_REQUEST,
OFPST_PORT, "OFPST_PORT request",
- OSR_SIZE + sizeof(struct ofp_port_stats_request), 0 },
+ sizeof(struct ofp_port_stats_request), 0 },
{ OFPUTIL_OFPST_QUEUE_REQUEST,
OFPST_QUEUE, "OFPST_QUEUE request",
- OSR_SIZE + sizeof(struct ofp_queue_stats_request), 0 },
+ sizeof(struct ofp_queue_stats_request), 0 },
{ 0,
OFPST_VENDOR, "OFPST_VENDOR request",
- OSR_SIZE + sizeof(uint32_t), 1 },
+ sizeof(struct ofp_vendor_stats_msg), 1 },
};
static const struct ofputil_msg_category ofpst_request_category = {
OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT)
};
- const struct ofp_stats_request *osr;
+ const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh;
int error;
- osr = (const struct ofp_stats_request *) oh;
error = ofputil_lookup_openflow_message(&ofpst_request_category,
- ntohs(osr->type),
+ ntohs(request->type),
ntohs(oh->length), typep);
- if (!error && osr->type == htons(OFPST_VENDOR)) {
+ if (!error && request->type == htons(OFPST_VENDOR)) {
error = ofputil_decode_nxst_request(oh, typep);
}
return error;
ofputil_decode_ofpst_reply(const struct ofp_header *oh,
const struct ofputil_msg_type **typep)
{
- enum { OSR_SIZE = sizeof(struct ofp_stats_reply) };
static const struct ofputil_msg_type ofpst_replies[] = {
{ OFPUTIL_OFPST_DESC_REPLY,
OFPST_DESC, "OFPST_DESC reply",
- OSR_SIZE + sizeof(struct ofp_desc_stats), 0 },
+ sizeof(struct ofp_desc_stats), 0 },
{ OFPUTIL_OFPST_FLOW_REPLY,
OFPST_FLOW, "OFPST_FLOW reply",
- OSR_SIZE, 1 },
+ sizeof(struct ofp_stats_msg), 1 },
{ OFPUTIL_OFPST_AGGREGATE_REPLY,
OFPST_AGGREGATE, "OFPST_AGGREGATE reply",
- OSR_SIZE + sizeof(struct ofp_aggregate_stats_reply), 0 },
+ sizeof(struct ofp_aggregate_stats_reply), 0 },
{ OFPUTIL_OFPST_TABLE_REPLY,
OFPST_TABLE, "OFPST_TABLE reply",
- OSR_SIZE, sizeof(struct ofp_table_stats) },
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) },
{ OFPUTIL_OFPST_PORT_REPLY,
OFPST_PORT, "OFPST_PORT reply",
- OSR_SIZE, sizeof(struct ofp_port_stats) },
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) },
{ OFPUTIL_OFPST_QUEUE_REPLY,
OFPST_QUEUE, "OFPST_QUEUE reply",
- OSR_SIZE, sizeof(struct ofp_queue_stats) },
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) },
{ 0,
OFPST_VENDOR, "OFPST_VENDOR reply",
- OSR_SIZE + sizeof(uint32_t), 1 },
+ sizeof(struct ofp_vendor_stats_msg), 1 },
};
static const struct ofputil_msg_category ofpst_reply_category = {
OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT)
};
- const struct ofp_stats_reply *osr = (const struct ofp_stats_reply *) oh;
+ const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh;
int error;
error = ofputil_lookup_openflow_message(&ofpst_reply_category,
- ntohs(osr->type),
+ ntohs(reply->type),
ntohs(oh->length), typep);
- if (!error && osr->type == htons(OFPST_VENDOR)) {
+ if (!error && reply->type == htons(OFPST_VENDOR)) {
error = ofputil_decode_nxst_reply(oh, typep);
}
return error;
{ 0,
OFPT_STATS_REQUEST, "OFPT_STATS_REQUEST",
- sizeof(struct ofp_stats_request), 1 },
+ sizeof(struct ofp_stats_msg), 1 },
{ 0,
OFPT_STATS_REPLY, "OFPT_STATS_REPLY",
- sizeof(struct ofp_stats_reply), 1 },
+ sizeof(struct ofp_stats_msg), 1 },
{ OFPUTIL_OFPT_BARRIER_REQUEST,
OFPT_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST",
}
if (error) {
static const struct ofputil_msg_type ofputil_invalid_type = {
- OFPUTIL_INVALID,
- 0, "OFPUTIL_INVALID",
+ OFPUTIL_MSG_INVALID,
+ 0, "OFPUTIL_MSG_INVALID",
0, 0
};
{
const struct flow_wildcards *wc = &rule->wc;
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
/* Only NXM supports separately wildcards the Ethernet multicast bit. */
if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) {
return NXFF_NXM;
*
* Does not validate the flow_mod actions. */
int
-ofputil_decode_flow_mod(struct flow_mod *fm, const struct ofp_header *oh,
- bool flow_mod_table_id)
+ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
+ const struct ofp_header *oh, bool flow_mod_table_id)
{
const struct ofputil_msg_type *type;
uint16_t command;
* 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is
* enabled, false otherwise. */
struct ofpbuf *
-ofputil_encode_flow_mod(const struct flow_mod *fm,
+ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
enum nx_flow_format flow_format,
bool flow_mod_table_id)
{
ofm = put_openflow(sizeof *ofm, OFPT_FLOW_MOD, msg);
ofputil_cls_rule_to_match(&fm->cr, &ofm->match);
ofm->cookie = fm->cookie;
- ofm->command = htons(fm->command);
+ ofm->command = htons(command);
ofm->idle_timeout = htons(fm->idle_timeout);
ofm->hard_timeout = htons(fm->hard_timeout);
ofm->priority = htons(fm->cr.priority);
}
static int
-ofputil_decode_ofpst_flow_request(struct flow_stats_request *fsr,
+ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr,
const struct ofp_header *oh,
bool aggregate)
{
- const struct ofp_flow_stats_request *ofsr = ofputil_stats_body(oh);
+ const struct ofp_flow_stats_request *ofsr =
+ (const struct ofp_flow_stats_request *) oh;
fsr->aggregate = aggregate;
ofputil_cls_rule_from_match(&ofsr->match, 0, &fsr->match);
}
static int
-ofputil_decode_nxst_flow_request(struct flow_stats_request *fsr,
+ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr,
const struct ofp_header *oh,
bool aggregate)
{
* request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if
* successful, otherwise an OpenFlow error code. */
int
-ofputil_decode_flow_stats_request(struct flow_stats_request *fsr,
+ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr,
const struct ofp_header *oh)
{
const struct ofputil_msg_type *type;
* OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
* 'flow_format', and returns the message. */
struct ofpbuf *
-ofputil_encode_flow_stats_request(const struct flow_stats_request *fsr,
+ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr,
enum nx_flow_format flow_format)
{
struct ofpbuf *msg;
struct ofp_flow_stats_request *ofsr;
int type;
- BUILD_ASSERT_DECL(sizeof(struct ofp_flow_stats_request)
- == sizeof(struct ofp_aggregate_stats_request));
-
type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW;
- ofsr = ofputil_make_stats_request(sizeof *ofsr, type, &msg);
+ ofsr = ofputil_make_stats_request(sizeof *ofsr, type, 0, &msg);
ofputil_cls_rule_to_match(&fsr->match, &ofsr->match);
ofsr->table_id = fsr->table_id;
ofsr->out_port = htons(fsr->out_port);
int subtype;
subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW;
- ofputil_make_nxstats_request(sizeof *nfsr, subtype, &msg);
+ ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg);
match_len = nx_put_match(msg, &fsr->match);
nfsr = msg->data;
if (!msg->l2) {
msg->l2 = msg->data;
if (code == OFPUTIL_OFPST_FLOW_REPLY) {
- ofpbuf_pull(msg, sizeof(struct ofp_stats_reply));
+ ofpbuf_pull(msg, sizeof(struct ofp_stats_msg));
} else if (code == OFPUTIL_NXST_FLOW_REPLY) {
ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
} else {
return 0;
}
+/* Returns 'count' unchanged except that UINT64_MAX becomes 0.
+ *
+ * We use this in situations where OVS internally uses UINT64_MAX to mean
+ * "value unknown" but OpenFlow 1.0 does not define any unknown value. */
+static uint64_t
+unknown_to_zero(uint64_t count)
+{
+ return count != UINT64_MAX ? count : 0;
+}
+
+/* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to
+ * those already present in the list of ofpbufs in 'replies'. 'replies' should
+ * have been initialized with ofputil_start_stats_reply(). */
+void
+ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs,
+ struct list *replies)
+{
+ size_t act_len = fs->n_actions * sizeof *fs->actions;
+ const struct ofp_stats_msg *osm;
+
+ osm = ofpbuf_from_list(list_back(replies))->data;
+ if (osm->type == htons(OFPST_FLOW)) {
+ size_t len = offsetof(struct ofp_flow_stats, actions) + act_len;
+ struct ofp_flow_stats *ofs;
+
+ ofs = ofputil_append_stats_reply(len, replies);
+ ofs->length = htons(len);
+ ofs->table_id = fs->table_id;
+ ofs->pad = 0;
+ ofputil_cls_rule_to_match(&fs->rule, &ofs->match);
+ ofs->duration_sec = htonl(fs->duration_sec);
+ ofs->duration_nsec = htonl(fs->duration_nsec);
+ ofs->priority = htons(fs->rule.priority);
+ ofs->idle_timeout = htons(fs->idle_timeout);
+ ofs->hard_timeout = htons(fs->hard_timeout);
+ memset(ofs->pad2, 0, sizeof ofs->pad2);
+ put_32aligned_be64(&ofs->cookie, fs->cookie);
+ put_32aligned_be64(&ofs->packet_count,
+ htonll(unknown_to_zero(fs->packet_count)));
+ put_32aligned_be64(&ofs->byte_count,
+ htonll(unknown_to_zero(fs->byte_count)));
+ memcpy(ofs->actions, fs->actions, act_len);
+ } else if (osm->type == htons(OFPST_VENDOR)) {
+ struct nx_flow_stats *nfs;
+ struct ofpbuf *msg;
+ size_t start_len;
+
+ msg = ofputil_reserve_stats_reply(
+ sizeof *nfs + NXM_MAX_LEN + act_len, replies);
+ start_len = msg->size;
+
+ nfs = ofpbuf_put_uninit(msg, sizeof *nfs);
+ nfs->table_id = fs->table_id;
+ nfs->pad = 0;
+ nfs->duration_sec = htonl(fs->duration_sec);
+ nfs->duration_nsec = htonl(fs->duration_nsec);
+ nfs->priority = htons(fs->rule.priority);
+ nfs->idle_timeout = htons(fs->idle_timeout);
+ nfs->hard_timeout = htons(fs->hard_timeout);
+ nfs->match_len = htons(nx_put_match(msg, &fs->rule));
+ memset(nfs->pad2, 0, sizeof nfs->pad2);
+ nfs->cookie = fs->cookie;
+ nfs->packet_count = htonll(fs->packet_count);
+ nfs->byte_count = htonll(fs->byte_count);
+ ofpbuf_put(msg, fs->actions, act_len);
+ nfs->length = htons(msg->size - start_len);
+ } else {
+ NOT_REACHED();
+ }
+}
+
+/* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or
+ * NXST_AGGREGATE reply according to 'flow_format', and returns the message. */
+struct ofpbuf *
+ofputil_encode_aggregate_stats_reply(
+ const struct ofputil_aggregate_stats *stats,
+ const struct ofp_stats_msg *request)
+{
+ struct ofpbuf *msg;
+
+ if (request->type == htons(OFPST_AGGREGATE)) {
+ struct ofp_aggregate_stats_reply *asr;
+
+ asr = ofputil_make_stats_reply(sizeof *asr, request, &msg);
+ put_32aligned_be64(&asr->packet_count,
+ htonll(unknown_to_zero(stats->packet_count)));
+ put_32aligned_be64(&asr->byte_count,
+ htonll(unknown_to_zero(stats->byte_count)));
+ asr->flow_count = htonl(stats->flow_count);
+ } else if (request->type == htons(OFPST_VENDOR)) {
+ struct nx_aggregate_stats_reply *nasr;
+
+ nasr = ofputil_make_stats_reply(sizeof *nasr, request, &msg);
+ assert(nasr->nsm.subtype == htonl(NXST_AGGREGATE));
+ nasr->packet_count = htonll(stats->packet_count);
+ nasr->byte_count = htonll(stats->byte_count);
+ nasr->flow_count = htonl(stats->flow_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ return msg;
+}
+
/* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an
* abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise
* an OpenFlow error code. */
ofr->duration_sec = htonl(fr->duration_sec);
ofr->duration_nsec = htonl(fr->duration_nsec);
ofr->idle_timeout = htons(fr->idle_timeout);
- ofr->packet_count = htonll(fr->packet_count);
- ofr->byte_count = htonll(fr->byte_count);
+ ofr->packet_count = htonll(unknown_to_zero(fr->packet_count));
+ ofr->byte_count = htonll(unknown_to_zero(fr->byte_count));
} else if (flow_format == NXFF_NXM) {
struct nx_flow_removed *nfr;
int match_len;
oh->length = htons(buffer->size);
}
-/* Creates an ofp_stats_request with the given 'type' and 'body_len' bytes of
- * space allocated for the 'body' member. Returns the first byte of the 'body'
- * member. */
+static void
+put_stats__(ovs_be32 xid, uint8_t ofp_type,
+ ovs_be16 ofpst_type, ovs_be32 nxst_subtype,
+ struct ofpbuf *msg)
+{
+ if (ofpst_type == htons(OFPST_VENDOR)) {
+ struct nicira_stats_msg *nsm;
+
+ nsm = put_openflow_xid(sizeof *nsm, ofp_type, xid, msg);
+ nsm->vsm.osm.type = ofpst_type;
+ nsm->vsm.vendor = htonl(NX_VENDOR_ID);
+ nsm->subtype = nxst_subtype;
+ } else {
+ struct ofp_stats_msg *osm;
+
+ osm = put_openflow_xid(sizeof *osm, ofp_type, xid, msg);
+ osm->type = ofpst_type;
+ }
+}
+
+/* Creates a statistics request message with total length 'openflow_len'
+ * (including all headers) and the given 'ofpst_type', and stores the buffer
+ * containing the new message in '*bufferp'. If 'ofpst_type' is OFPST_VENDOR
+ * then 'nxst_subtype' is used as the Nicira vendor extension statistics
+ * subtype (otherwise 'nxst_subtype' is ignored).
+ *
+ * Initializes bytes following the headers to all-bits-zero.
+ *
+ * Returns the first byte of the new message. */
void *
-ofputil_make_stats_request(size_t body_len, uint16_t type,
- struct ofpbuf **bufferp)
+ofputil_make_stats_request(size_t openflow_len, uint16_t ofpst_type,
+ uint32_t nxst_subtype, struct ofpbuf **bufferp)
{
- struct ofp_stats_request *osr;
- osr = make_openflow((offsetof(struct ofp_stats_request, body)
- + body_len), OFPT_STATS_REQUEST, bufferp);
- osr->type = htons(type);
- osr->flags = htons(0);
- return osr->body;
+ struct ofpbuf *msg;
+
+ msg = *bufferp = ofpbuf_new(openflow_len);
+ put_stats__(alloc_xid(), OFPT_STATS_REQUEST,
+ htons(ofpst_type), htonl(nxst_subtype), msg);
+ ofpbuf_padto(msg, openflow_len);
+
+ return msg->data;
}
-/* Creates a stats request message with Nicira as vendor and the given
- * 'subtype', of total length 'openflow_len'. Returns the message. */
+static void
+put_stats_reply__(const struct ofp_stats_msg *request, struct ofpbuf *msg)
+{
+ assert(request->header.type == OFPT_STATS_REQUEST ||
+ request->header.type == OFPT_STATS_REPLY);
+ put_stats__(request->header.xid, OFPT_STATS_REPLY, request->type,
+ (request->type != htons(OFPST_VENDOR)
+ ? htonl(0)
+ : ((const struct nicira_stats_msg *) request)->subtype),
+ msg);
+}
+
+/* Creates a statistics reply message with total length 'openflow_len'
+ * (including all headers) and the same type (either a standard OpenFlow
+ * statistics type or a Nicira extension type and subtype) as 'request', and
+ * stores the buffer containing the new message in '*bufferp'.
+ *
+ * Initializes bytes following the headers to all-bits-zero.
+ *
+ * Returns the first byte of the new message. */
void *
-ofputil_make_nxstats_request(size_t openflow_len, uint32_t subtype,
- struct ofpbuf **bufferp)
+ofputil_make_stats_reply(size_t openflow_len,
+ const struct ofp_stats_msg *request,
+ struct ofpbuf **bufferp)
+{
+ struct ofpbuf *msg;
+
+ msg = *bufferp = ofpbuf_new(openflow_len);
+ put_stats_reply__(request, msg);
+ ofpbuf_padto(msg, openflow_len);
+
+ return msg->data;
+}
+
+/* Initializes 'replies' as a list of ofpbufs that will contain a series of
+ * replies to 'request', which should be an OpenFlow or Nicira extension
+ * statistics request. Initially 'replies' will have a single reply message
+ * that has only a header. The functions ofputil_reserve_stats_reply() and
+ * ofputil_append_stats_reply() may be used to add to the reply. */
+void
+ofputil_start_stats_reply(const struct ofp_stats_msg *request,
+ struct list *replies)
+{
+ struct ofpbuf *msg;
+
+ msg = ofpbuf_new(1024);
+ put_stats_reply__(request, msg);
+
+ list_init(replies);
+ list_push_back(replies, &msg->list_node);
+}
+
+/* Prepares to append up to 'len' bytes to the series of statistics replies in
+ * 'replies', which should have been initialized with
+ * ofputil_start_stats_reply(). Returns an ofpbuf with at least 'len' bytes of
+ * tailroom. (The 'len' bytes have not actually be allocated; the caller must
+ * do so with e.g. ofpbuf_put_uninit().) */
+struct ofpbuf *
+ofputil_reserve_stats_reply(size_t len, struct list *replies)
{
- struct nicira_stats_msg *nsm;
+ struct ofpbuf *msg = ofpbuf_from_list(list_back(replies));
+ struct ofp_stats_msg *osm = msg->data;
- nsm = make_openflow(openflow_len, OFPT_STATS_REQUEST, bufferp);
- nsm->type = htons(OFPST_VENDOR);
- nsm->flags = htons(0);
- nsm->vendor = htonl(NX_VENDOR_ID);
- nsm->subtype = htonl(subtype);
- return nsm;
+ if (msg->size + len <= UINT16_MAX) {
+ ofpbuf_prealloc_tailroom(msg, len);
+ } else {
+ osm->flags |= htons(OFPSF_REPLY_MORE);
+
+ msg = ofpbuf_new(MAX(1024, sizeof(struct nicira_stats_msg) + len));
+ put_stats_reply__(osm, msg);
+ list_push_back(replies, &msg->list_node);
+ }
+ return msg;
}
-/* Returns the first byte of the 'body' member of the ofp_stats_request or
- * ofp_stats_reply in 'oh'. */
+/* Appends 'len' bytes to the series of statistics replies in 'replies', and
+ * returns the first byte. */
+void *
+ofputil_append_stats_reply(size_t len, struct list *replies)
+{
+ return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len);
+}
+
+/* Returns the first byte past the ofp_stats_msg header in 'oh'. */
const void *
ofputil_stats_body(const struct ofp_header *oh)
{
assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY);
- return ((const struct ofp_stats_request *) oh)->body;
+ return (const struct ofp_stats_msg *) oh + 1;
}
-/* Returns the length of the 'body' member of the ofp_stats_request or
- * ofp_stats_reply in 'oh'. */
+/* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */
size_t
ofputil_stats_body_len(const struct ofp_header *oh)
{
assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY);
- return ntohs(oh->length) - sizeof(struct ofp_stats_request);
+ return ntohs(oh->length) - sizeof(struct ofp_stats_msg);
}
-/* Returns the first byte of the body of the nicira_stats_msg in 'oh'. */
+/* Returns the first byte past the nicira_stats_msg header in 'oh'. */
const void *
ofputil_nxstats_body(const struct ofp_header *oh)
{
return ((const struct nicira_stats_msg *) oh) + 1;
}
-/* Returns the length of the body of the nicira_stats_msg in 'oh'. */
+/* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */
size_t
ofputil_nxstats_body_len(const struct ofp_header *oh)
{
struct ofpbuf *buffer;
buffer = make_add_flow(rule, buffer_id, idle_timeout, sizeof *oao);
- oao = ofpbuf_put_zeros(buffer, sizeof *oao);
- oao->type = htons(OFPAT_OUTPUT);
- oao->len = htons(sizeof *oao);
- oao->port = htons(out_port);
+ ofputil_put_OFPAT_OUTPUT(buffer)->port = htons(out_port);
return buffer;
} else {
return make_add_flow(rule, buffer_id, idle_timeout, 0);
opo->header.length = htons(size);
opo->header.xid = htonl(0);
opo->buffer_id = htonl(buffer_id);
- opo->in_port = htons(in_port == ODPP_LOCAL ? OFPP_LOCAL : in_port);
+ opo->in_port = htons(in_port == OVSP_LOCAL ? OFPP_LOCAL : in_port);
opo->actions_len = htons(actions_len);
ofpbuf_put(out, actions, actions_len);
if (packet) {
return out;
}
-static int
-check_action_exact_len(const union ofp_action *a, unsigned int len,
- unsigned int required_len)
-{
- if (len != required_len) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "action %"PRIu16" has invalid length "
- "%"PRIu16" (must be %u)\n",
- ntohs(a->type), ntohs(a->header.len), required_len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
- return 0;
-}
-
-static int
-check_nx_action_exact_len(const struct nx_action_header *a,
- unsigned int len, unsigned int required_len)
-{
- if (len != required_len) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "Nicira action %"PRIu16" has invalid length %"PRIu16" "
- "(must be %u)\n",
- ntohs(a->subtype), ntohs(a->len), required_len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
- return 0;
-}
-
/* Checks that 'port' is a valid output port for the OFPAT_OUTPUT action, given
* that the switch will never have more than 'max_ports' ports. Returns 0 if
* 'port' is valid, otherwise an ofp_mkerr() return code. */
-static int
-check_output_port(uint16_t port, int max_ports)
+int
+ofputil_check_output_port(uint16_t port, int max_ports)
{
switch (port) {
case OFPP_IN_PORT:
if (port < max_ports) {
return 0;
}
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown output port %x", port);
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
}
}
-/* Checks that 'action' is a valid OFPAT_ENQUEUE action, given that the switch
- * will never have more than 'max_ports' ports. Returns 0 if 'port' is valid,
- * otherwise an ofp_mkerr() return code. */
-static int
-check_enqueue_action(const union ofp_action *a, unsigned int len,
- int max_ports)
+#define OFPUTIL_NAMED_PORTS \
+ OFPUTIL_NAMED_PORT(IN_PORT) \
+ OFPUTIL_NAMED_PORT(TABLE) \
+ OFPUTIL_NAMED_PORT(NORMAL) \
+ OFPUTIL_NAMED_PORT(FLOOD) \
+ OFPUTIL_NAMED_PORT(ALL) \
+ OFPUTIL_NAMED_PORT(CONTROLLER) \
+ OFPUTIL_NAMED_PORT(LOCAL) \
+ OFPUTIL_NAMED_PORT(NONE)
+
+/* Checks whether 's' is the string representation of an OpenFlow port number,
+ * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the
+ * number in '*port' and returns true. Otherwise, returns false. */
+bool
+ofputil_port_from_string(const char *name, uint16_t *port)
{
- const struct ofp_action_enqueue *oae;
- uint16_t port;
- int error;
+ struct pair {
+ const char *name;
+ uint16_t value;
+ };
+ static const struct pair pairs[] = {
+#define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME},
+ OFPUTIL_NAMED_PORTS
+#undef OFPUTIL_NAMED_PORT
+ };
+ static const int n_pairs = ARRAY_SIZE(pairs);
+ int i;
- error = check_action_exact_len(a, len, 16);
- if (error) {
- return error;
+ if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) {
+ *port = i;
+ return true;
}
- oae = (const struct ofp_action_enqueue *) a;
- port = ntohs(oae->port);
- if (port < max_ports || port == OFPP_IN_PORT) {
- return 0;
+ for (i = 0; i < n_pairs; i++) {
+ if (!strcasecmp(name, pairs[i].name)) {
+ *port = pairs[i].value;
+ return true;
+ }
}
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown enqueue port %x", port);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
+ return false;
}
-static int
-check_nicira_action(const union ofp_action *a, unsigned int len,
- const struct flow *flow)
+/* Appends to 's' a string representation of the OpenFlow port number 'port'.
+ * Most ports' string representation is just the port number, but for special
+ * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */
+void
+ofputil_format_port(uint16_t port, struct ds *s)
{
- const struct nx_action_header *nah;
- int subtype;
- int error;
+ const char *name;
- if (len < 16) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "Nicira vendor action only %u bytes", len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ switch (port) {
+#define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break;
+ OFPUTIL_NAMED_PORTS
+#undef OFPUTIL_NAMED_PORT
+
+ default:
+ ds_put_format(s, "%"PRIu16, port);
+ return;
}
- nah = (const struct nx_action_header *) a;
+ ds_put_cstr(s, name);
+}
- subtype = ntohs(nah->subtype);
- if (subtype > TYPE_MAXIMUM(enum nx_action_subtype)) {
- /* This is necessary because enum nx_action_subtype may be an
- * 8-bit type, so the cast below throws away the top 8 bits. */
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
+static int
+check_resubmit_table(const struct nx_action_resubmit *nar)
+{
+ if (nar->pad[0] || nar->pad[1] || nar->pad[2]) {
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
+ return 0;
+}
- switch ((enum nx_action_subtype) subtype) {
- case NXAST_RESUBMIT:
- case NXAST_SET_TUNNEL:
- case NXAST_DROP_SPOOFED_ARP:
- case NXAST_SET_QUEUE:
- case NXAST_POP_QUEUE:
- return check_nx_action_exact_len(nah, len, 16);
+static int
+check_output_reg(const struct nx_action_output_reg *naor,
+ const struct flow *flow)
+{
+ size_t i;
- case NXAST_REG_MOVE:
- error = check_nx_action_exact_len(nah, len,
- sizeof(struct nx_action_reg_move));
- if (error) {
- return error;
+ for (i = 0; i < sizeof naor->zero; i++) {
+ if (naor->zero[i]) {
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
- return nxm_check_reg_move((const struct nx_action_reg_move *) a, flow);
+ }
+
+ return nxm_src_check(naor->src, nxm_decode_ofs(naor->ofs_nbits),
+ nxm_decode_n_bits(naor->ofs_nbits), flow);
+}
+
+int
+validate_actions(const union ofp_action *actions, size_t n_actions,
+ const struct flow *flow, int max_ports)
+{
+ const union ofp_action *a;
+ size_t left;
+
+ OFPUTIL_ACTION_FOR_EACH (a, left, actions, n_actions) {
+ uint16_t port;
+ int error;
+ int code;
+
+ code = ofputil_decode_action(a);
+ if (code < 0) {
+ char *msg;
+
+ error = -code;
+ msg = ofputil_error_to_string(error);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "action decoding error at offset %td (%s)",
+ (a - actions) * sizeof *a, msg);
+ free(msg);
- case NXAST_REG_LOAD:
- error = check_nx_action_exact_len(nah, len,
- sizeof(struct nx_action_reg_load));
- if (error) {
return error;
}
- return nxm_check_reg_load((const struct nx_action_reg_load *) a, flow);
- case NXAST_NOTE:
- return 0;
+ error = 0;
+ switch ((enum ofputil_action_code) code) {
+ case OFPUTIL_OFPAT_OUTPUT:
+ error = ofputil_check_output_port(ntohs(a->output.port),
+ max_ports);
+ break;
- case NXAST_SET_TUNNEL64:
- return check_nx_action_exact_len(
- nah, len, sizeof(struct nx_action_set_tunnel64));
+ case OFPUTIL_OFPAT_SET_VLAN_VID:
+ if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
+ error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+ }
+ break;
- case NXAST_MULTIPATH:
- error = check_nx_action_exact_len(
- nah, len, sizeof(struct nx_action_multipath));
- if (error) {
- return error;
+ case OFPUTIL_OFPAT_SET_VLAN_PCP:
+ if (a->vlan_pcp.vlan_pcp & ~7) {
+ error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+ }
+ break;
+
+ case OFPUTIL_OFPAT_ENQUEUE:
+ port = ntohs(((const struct ofp_action_enqueue *) a)->port);
+ if (port >= max_ports && port != OFPP_IN_PORT) {
+ error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
+ }
+ break;
+
+ case OFPUTIL_NXAST_REG_MOVE:
+ error = nxm_check_reg_move((const struct nx_action_reg_move *) a,
+ flow);
+ break;
+
+ case OFPUTIL_NXAST_REG_LOAD:
+ error = nxm_check_reg_load((const struct nx_action_reg_load *) a,
+ flow);
+ break;
+
+ case OFPUTIL_NXAST_MULTIPATH:
+ error = multipath_check((const struct nx_action_multipath *) a,
+ flow);
+ break;
+
+ case OFPUTIL_NXAST_AUTOPATH:
+ error = autopath_check((const struct nx_action_autopath *) a,
+ flow);
+ break;
+
+ case OFPUTIL_NXAST_BUNDLE:
+ case OFPUTIL_NXAST_BUNDLE_LOAD:
+ error = bundle_check((const struct nx_action_bundle *) a,
+ max_ports, flow);
+ break;
+
+ case OFPUTIL_NXAST_OUTPUT_REG:
+ error = check_output_reg((const struct nx_action_output_reg *) a,
+ flow);
+ break;
+
+ case OFPUTIL_NXAST_RESUBMIT_TABLE:
+ error = check_resubmit_table(
+ (const struct nx_action_resubmit *) a);
+ break;
+
+ case OFPUTIL_OFPAT_STRIP_VLAN:
+ case OFPUTIL_OFPAT_SET_NW_SRC:
+ case OFPUTIL_OFPAT_SET_NW_DST:
+ case OFPUTIL_OFPAT_SET_NW_TOS:
+ case OFPUTIL_OFPAT_SET_TP_SRC:
+ case OFPUTIL_OFPAT_SET_TP_DST:
+ case OFPUTIL_OFPAT_SET_DL_SRC:
+ case OFPUTIL_OFPAT_SET_DL_DST:
+ case OFPUTIL_NXAST_RESUBMIT:
+ case OFPUTIL_NXAST_SET_TUNNEL:
+ case OFPUTIL_NXAST_SET_QUEUE:
+ case OFPUTIL_NXAST_POP_QUEUE:
+ case OFPUTIL_NXAST_NOTE:
+ case OFPUTIL_NXAST_SET_TUNNEL64:
+ break;
}
- return multipath_check((const struct nx_action_multipath *) a);
- case NXAST_AUTOPATH:
- error = check_nx_action_exact_len(
- nah, len, sizeof(struct nx_action_autopath));
if (error) {
+ char *msg = ofputil_error_to_string(error);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "bad action at offset %td (%s)",
+ (a - actions) * sizeof *a, msg);
+ free(msg);
return error;
}
- return autopath_check((const struct nx_action_autopath *) a);
-
- case NXAST_SNAT__OBSOLETE:
- default:
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "unknown Nicira vendor action subtype %d", subtype);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
}
+ if (left) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "bad action format at offset %zu",
+ (n_actions - left) * sizeof *a);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ return 0;
}
-static int
-check_action(const union ofp_action *a, unsigned int len,
- const struct flow *flow, int max_ports)
+struct ofputil_action {
+ int code;
+ unsigned int min_len;
+ unsigned int max_len;
+};
+
+static const struct ofputil_action action_bad_type
+ = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE), 0, UINT_MAX };
+static const struct ofputil_action action_bad_len
+ = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_LEN), 0, UINT_MAX };
+static const struct ofputil_action action_bad_vendor
+ = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR), 0, UINT_MAX };
+
+static const struct ofputil_action *
+ofputil_decode_ofpat_action(const union ofp_action *a)
{
enum ofp_action_type type = ntohs(a->type);
- int error;
switch (type) {
- case OFPAT_OUTPUT:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) \
+ case ENUM: { \
+ static const struct ofputil_action action = { \
+ OFPUTIL_##ENUM, \
+ sizeof(struct STRUCT), \
+ sizeof(struct STRUCT) \
+ }; \
+ return &action; \
}
- return check_output_port(ntohs(a->output.port), max_ports);
+#include "ofp-util.def"
- case OFPAT_SET_VLAN_VID:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
- }
- if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
- }
- return 0;
+ case OFPAT_VENDOR:
+ default:
+ return &action_bad_type;
+ }
+}
- case OFPAT_SET_VLAN_PCP:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
- }
- if (a->vlan_pcp.vlan_pcp & ~7) {
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+static const struct ofputil_action *
+ofputil_decode_nxast_action(const union ofp_action *a)
+{
+ const struct nx_action_header *nah = (const struct nx_action_header *) a;
+ enum nx_action_subtype subtype = ntohs(nah->subtype);
+
+ switch (subtype) {
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ case ENUM: { \
+ static const struct ofputil_action action = { \
+ OFPUTIL_##ENUM, \
+ sizeof(struct STRUCT), \
+ EXTENSIBLE ? UINT_MAX : sizeof(struct STRUCT) \
+ }; \
+ return &action; \
}
- return 0;
+#include "ofp-util.def"
- case OFPAT_STRIP_VLAN:
- case OFPAT_SET_NW_SRC:
- case OFPAT_SET_NW_DST:
- case OFPAT_SET_NW_TOS:
- case OFPAT_SET_TP_SRC:
- case OFPAT_SET_TP_DST:
- return check_action_exact_len(a, len, 8);
+ case NXAST_SNAT__OBSOLETE:
+ case NXAST_DROP_SPOOFED_ARP__OBSOLETE:
+ default:
+ return &action_bad_type;
+ }
+}
- case OFPAT_SET_DL_SRC:
- case OFPAT_SET_DL_DST:
- return check_action_exact_len(a, len, 16);
+/* Parses 'a' to determine its type. Returns a nonnegative OFPUTIL_OFPAT_* or
+ * OFPUTIL_NXAST_* constant if successful, otherwise a negative OpenFlow error
+ * code (as returned by ofp_mkerr()).
+ *
+ * The caller must have already verified that 'a''s length is correct (that is,
+ * a->header.len is nonzero and a multiple of sizeof(union ofp_action) and no
+ * longer than the amount of space allocated to 'a').
+ *
+ * This function verifies that 'a''s length is correct for the type of action
+ * that it represents. */
+int
+ofputil_decode_action(const union ofp_action *a)
+{
+ const struct ofputil_action *action;
+ uint16_t len = ntohs(a->header.len);
- case OFPAT_VENDOR:
- return (a->vendor.vendor == htonl(NX_VENDOR_ID)
- ? check_nicira_action(a, len, flow)
- : ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR));
+ if (a->type != htons(OFPAT_VENDOR)) {
+ action = ofputil_decode_ofpat_action(a);
+ } else {
+ switch (ntohl(a->vendor.vendor)) {
+ case NX_VENDOR_ID:
+ if (len < sizeof(struct nx_action_header)) {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ action = ofputil_decode_nxast_action(a);
+ break;
+ default:
+ action = &action_bad_vendor;
+ break;
+ }
+ }
- case OFPAT_ENQUEUE:
- return check_enqueue_action(a, len, max_ports);
+ return (len >= action->min_len && len <= action->max_len
+ ? action->code
+ : -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN));
+}
- default:
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown action type %d", (int) type);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+/* Parses 'a' and returns its type as an OFPUTIL_OFPAT_* or OFPUTIL_NXAST_*
+ * constant. The caller must have already validated that 'a' is a valid action
+ * understood by Open vSwitch (e.g. by a previous successful call to
+ * ofputil_decode_action()). */
+enum ofputil_action_code
+ofputil_decode_action_unsafe(const union ofp_action *a)
+{
+ const struct ofputil_action *action;
+
+ if (a->type != htons(OFPAT_VENDOR)) {
+ action = ofputil_decode_ofpat_action(a);
+ } else {
+ action = ofputil_decode_nxast_action(a);
}
+
+ return action->code;
}
+/* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if
+ * 'name' is "output" then the return value is OFPUTIL_OFPAT_OUTPUT), or -1 if
+ * 'name' is not the name of any action.
+ *
+ * ofp-util.def lists the mapping from names to action. */
int
-validate_actions(const union ofp_action *actions, size_t n_actions,
- const struct flow *flow, int max_ports)
+ofputil_action_code_from_name(const char *name)
{
- size_t i;
-
- for (i = 0; i < n_actions; ) {
- const union ofp_action *a = &actions[i];
- unsigned int len = ntohs(a->header.len);
- unsigned int n_slots = len / OFP_ACTION_ALIGN;
- unsigned int slots_left = &actions[n_actions] - a;
- int error;
+ static const char *names[OFPUTIL_N_ACTIONS] = {
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) NAME,
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME,
+#include "ofp-util.def"
+ };
- if (n_slots > slots_left) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "action requires %u slots but only %u remain",
- n_slots, slots_left);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (!len) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "action has invalid length 0");
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (len % OFP_ACTION_ALIGN) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
- "of %d", len, OFP_ACTION_ALIGN);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
+ const char **p;
- error = check_action(a, len, flow, max_ports);
- if (error) {
- return error;
+ for (p = names; p < &names[ARRAY_SIZE(names)]; p++) {
+ if (*p && !strcasecmp(name, *p)) {
+ return p - names;
}
- i += n_slots;
}
- return 0;
+ return -1;
}
+/* Appends an action of the type specified by 'code' to 'buf' and returns the
+ * action. Initializes the parts of 'action' that identify it as having type
+ * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that
+ * have variable length, the length used and cleared is that of struct
+ * <STRUCT>. */
+void *
+ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf)
+{
+ switch (code) {
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) \
+ case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
+#include "ofp-util.def"
+ }
+ NOT_REACHED();
+}
+
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) \
+ void \
+ ofputil_init_##ENUM(struct STRUCT *s) \
+ { \
+ memset(s, 0, sizeof *s); \
+ s->type = htons(ENUM); \
+ s->len = htons(sizeof *s); \
+ } \
+ \
+ struct STRUCT * \
+ ofputil_put_##ENUM(struct ofpbuf *buf) \
+ { \
+ struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
+ ofputil_init_##ENUM(s); \
+ return s; \
+ }
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ void \
+ ofputil_init_##ENUM(struct STRUCT *s) \
+ { \
+ memset(s, 0, sizeof *s); \
+ s->type = htons(OFPAT_VENDOR); \
+ s->len = htons(sizeof *s); \
+ s->vendor = htonl(NX_VENDOR_ID); \
+ s->subtype = htons(ENUM); \
+ } \
+ \
+ struct STRUCT * \
+ ofputil_put_##ENUM(struct ofpbuf *buf) \
+ { \
+ struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
+ ofputil_init_##ENUM(s); \
+ return s; \
+ }
+#include "ofp-util.def"
+
/* Returns true if 'action' outputs to 'port', false otherwise. */
bool
action_outputs_to_port(const union ofp_action *action, ovs_be16 port)
}
}
-/* The set of actions must either come from a trusted source or have been
- * previously validated with validate_actions(). */
-const union ofp_action *
-actions_first(struct actions_iterator *iter,
- const union ofp_action *oa, size_t n_actions)
-{
- iter->pos = oa;
- iter->end = oa + n_actions;
- return actions_next(iter);
-}
-
-const union ofp_action *
-actions_next(struct actions_iterator *iter)
-{
- if (iter->pos != iter->end) {
- const union ofp_action *a = iter->pos;
- unsigned int len = ntohs(a->header.len);
- iter->pos += len / OFP_ACTION_ALIGN;
- return a;
- } else {
- return NULL;
- }
-}
-
/* "Normalizes" the wildcards in 'rule'. That means:
*
* 1. If the type of level N is known, then only the valid fields for that
*n_actionsp = 0;
return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
+
+bool
+ofputil_actions_equal(const union ofp_action *a, size_t n_a,
+ const union ofp_action *b, size_t n_b)
+{
+ return n_a == n_b && (!n_a || !memcmp(a, b, n_a * sizeof *a));
+}
+
+union ofp_action *
+ofputil_actions_clone(const union ofp_action *actions, size_t n)
+{
+ return n ? xmemdup(actions, n * sizeof *actions) : NULL;
+}
+
+/* Parses a key or a key-value pair from '*stringp'.
+ *
+ * On success: Stores the key into '*keyp'. Stores the value, if present, into
+ * '*valuep', otherwise an empty string. Advances '*stringp' past the end of
+ * the key-value pair, preparing it for another call. '*keyp' and '*valuep'
+ * are substrings of '*stringp' created by replacing some of its bytes by null
+ * terminators. Returns true.
+ *
+ * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to
+ * NULL and returns false. */
+bool
+ofputil_parse_key_value(char **stringp, char **keyp, char **valuep)
+{
+ char *pos, *key, *value;
+ size_t key_len;
+
+ pos = *stringp;
+ pos += strspn(pos, ", \t\r\n");
+ if (*pos == '\0') {
+ *keyp = *valuep = NULL;
+ return false;
+ }
+
+ key = pos;
+ key_len = strcspn(pos, ":=(, \t\r\n");
+ if (key[key_len] == ':' || key[key_len] == '=') {
+ /* The value can be separated by a colon. */
+ size_t value_len;
+
+ value = key + key_len + 1;
+ value_len = strcspn(value, ", \t\r\n");
+ pos = value + value_len + (value[value_len] != '\0');
+ value[value_len] = '\0';
+ } else if (key[key_len] == '(') {
+ /* The value can be surrounded by balanced parentheses. The outermost
+ * set of parentheses is removed. */
+ int level = 1;
+ size_t value_len;
+
+ value = key + key_len + 1;
+ for (value_len = 0; level > 0; value_len++) {
+ switch (value[value_len]) {
+ case '\0':
+ ovs_fatal(0, "unbalanced parentheses in argument to %s", key);
+
+ case '(':
+ level++;
+ break;
+
+ case ')':
+ level--;
+ break;
+ }
+ }
+ value[value_len - 1] = '\0';
+ pos = value + value_len;
+ } else {
+ /* There might be no value at all. */
+ value = key + key_len; /* Will become the empty string below. */
+ pos = key + key_len + (key[key_len] != '\0');
+ }
+ key[key_len] = '\0';
+
+ *stringp = pos;
+ *keyp = key;
+ *valuep = value;
+ return true;
+}