/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <config.h>
#include "ofp-print.h"
+#include <errno.h>
#include <inttypes.h>
+#include <netinet/icmp6.h>
#include <stdlib.h>
+#include "autopath.h"
#include "byte-order.h"
+#include "classifier.h"
+#include "dynamic-string.h"
+#include "multipath.h"
#include "nx-match.h"
+#include "ofp-errors.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "packets.h"
#include "random.h"
+#include "unaligned.h"
+#include "type-props.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(ofp_util);
* in the peer and so there's not much point in showing a lot of them. */
static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
-/* XXX we should really use consecutive xids to avoid probabilistic
- * failures. */
-static inline uint32_t
+/* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
+ * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
+ * is wildcarded.
+ *
+ * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
+ * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
+ * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
+ * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
+ * wildcarded. */
+ovs_be32
+ofputil_wcbits_to_netmask(int wcbits)
+{
+ wcbits &= 0x3f;
+ return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
+}
+
+/* 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()). */
+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
+}
+
+/* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and
+ * name. */
+#define WC_INVARIANT_LIST \
+ WC_INVARIANT_BIT(IN_PORT) \
+ WC_INVARIANT_BIT(DL_SRC) \
+ WC_INVARIANT_BIT(DL_DST) \
+ WC_INVARIANT_BIT(DL_TYPE) \
+ WC_INVARIANT_BIT(NW_PROTO) \
+ WC_INVARIANT_BIT(TP_SRC) \
+ WC_INVARIANT_BIT(TP_DST)
+
+/* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST)
+ * actually have the same names and values. */
+#define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW_##NAME);
+ WC_INVARIANT_LIST
+#undef WC_INVARIANT_BIT
+
+/* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all
+ * OR'd together. */
+static const flow_wildcards_t WC_INVARIANTS = 0
+#define WC_INVARIANT_BIT(NAME) | FWW_##NAME
+ WC_INVARIANT_LIST
+#undef WC_INVARIANT_BIT
+;
+
+/* 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. */
+void
+ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc)
+{
+ /* Initialize most of rule->wc. */
+ flow_wildcards_init_catchall(wc);
+ wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS;
+
+ /* Wildcard fields that aren't defined by ofp_match or tun_id. */
+ wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_ND_TARGET);
+
+ if (ofpfw & OFPFW_NW_TOS) {
+ wc->wildcards |= FWW_NW_TOS;
+ }
+ wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_SRC_SHIFT);
+ wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_DST_SHIFT);
+
+ if (ofpfw & OFPFW_DL_DST) {
+ /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but
+ * Open vSwitch breaks the Ethernet destination into bits as FWW_DL_DST
+ * and FWW_ETH_MCAST. */
+ wc->wildcards |= FWW_ETH_MCAST;
+ }
+
+ /* VLAN TCI mask. */
+ if (!(ofpfw & OFPFW_DL_VLAN_PCP)) {
+ wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI);
+ }
+ if (!(ofpfw & OFPFW_DL_VLAN)) {
+ wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
+ }
+}
+
+/* Converts the ofp_match in 'match' into a cls_rule in 'rule', with the given
+ * 'priority'. */
+void
+ofputil_cls_rule_from_match(const struct ofp_match *match,
+ unsigned int priority, struct cls_rule *rule)
+{
+ uint32_t ofpfw = ntohl(match->wildcards) & OFPFW_ALL;
+
+ /* Initialize rule->priority, rule->wc. */
+ rule->priority = !ofpfw ? UINT16_MAX : priority;
+ ofputil_wildcard_from_openflow(ofpfw, &rule->wc);
+
+ /* Initialize most of rule->flow. */
+ rule->flow.nw_src = match->nw_src;
+ rule->flow.nw_dst = match->nw_dst;
+ rule->flow.in_port = ntohs(match->in_port);
+ rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
+ rule->flow.tp_src = match->tp_src;
+ rule->flow.tp_dst = match->tp_dst;
+ memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
+ memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN);
+ rule->flow.nw_tos = match->nw_tos;
+ rule->flow.nw_proto = match->nw_proto;
+
+ /* Translate VLANs. */
+ if (!(ofpfw & OFPFW_DL_VLAN) && match->dl_vlan == htons(OFP_VLAN_NONE)) {
+ /* Match only packets without 802.1Q header.
+ *
+ * When OFPFW_DL_VLAN_PCP is wildcarded, this is obviously correct.
+ *
+ * If OFPFW_DL_VLAN_PCP is matched, the flow match is contradictory,
+ * because we can't have a specific PCP without an 802.1Q header.
+ * However, older versions of OVS treated this as matching packets
+ * withut an 802.1Q header, so we do here too. */
+ rule->flow.vlan_tci = htons(0);
+ rule->wc.vlan_tci_mask = htons(0xffff);
+ } else {
+ ovs_be16 vid, pcp, tci;
+
+ vid = match->dl_vlan & htons(VLAN_VID_MASK);
+ pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
+ tci = vid | pcp | htons(VLAN_CFI);
+ rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask;
+ }
+
+ /* Clean up. */
+ cls_rule_zero_wildcarded_fields(rule);
+}
+
+/* Convert 'rule' into the OpenFlow match structure 'match'. */
+void
+ofputil_cls_rule_to_match(const struct cls_rule *rule, struct ofp_match *match)
+{
+ const struct flow_wildcards *wc = &rule->wc;
+ uint32_t ofpfw;
+
+ /* Figure out most OpenFlow wildcards. */
+ ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS);
+ ofpfw |= ofputil_netmask_to_wcbits(wc->nw_src_mask) << OFPFW_NW_SRC_SHIFT;
+ ofpfw |= ofputil_netmask_to_wcbits(wc->nw_dst_mask) << OFPFW_NW_DST_SHIFT;
+ if (wc->wildcards & FWW_NW_TOS) {
+ ofpfw |= OFPFW_NW_TOS;
+ }
+
+ /* Translate VLANs. */
+ match->dl_vlan = htons(0);
+ match->dl_vlan_pcp = 0;
+ if (rule->wc.vlan_tci_mask == htons(0)) {
+ ofpfw |= OFPFW_DL_VLAN | OFPFW_DL_VLAN_PCP;
+ } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
+ && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
+ match->dl_vlan = htons(OFP_VLAN_NONE);
+ } else {
+ if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
+ ofpfw |= OFPFW_DL_VLAN;
+ } else {
+ match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
+ }
+
+ if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
+ ofpfw |= OFPFW_DL_VLAN_PCP;
+ } else {
+ match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
+ }
+ }
+
+ /* Compose most of the match structure. */
+ match->wildcards = htonl(ofpfw);
+ match->in_port = htons(rule->flow.in_port);
+ memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
+ memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
+ match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
+ match->nw_src = rule->flow.nw_src;
+ match->nw_dst = rule->flow.nw_dst;
+ match->nw_tos = rule->flow.nw_tos;
+ match->nw_proto = rule->flow.nw_proto;
+ match->tp_src = rule->flow.tp_src;
+ match->tp_dst = rule->flow.tp_dst;
+ memset(match->pad1, '\0', sizeof match->pad1);
+ memset(match->pad2, '\0', sizeof match->pad2);
+}
+
+/* Given a 'dl_type' value in the format used in struct flow, returns the
+ * corresponding 'dl_type' value for use in an OpenFlow ofp_match structure. */
+ovs_be16
+ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
+{
+ return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
+ ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ : flow_dl_type);
+}
+
+/* Given a 'dl_type' value in the format used in an OpenFlow ofp_match
+ * structure, returns the corresponding 'dl_type' value for use in struct
+ * flow. */
+ovs_be16
+ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
+{
+ return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ ? htons(FLOW_DL_TYPE_NONE)
+ : ofp_dl_type);
+}
+
+/* Returns a transaction ID to use for an outgoing OpenFlow message. */
+static ovs_be32
alloc_xid(void)
{
- return random_uint32();
+ static uint32_t next_xid = 1;
+ return htonl(next_xid++);
+}
+\f
+/* Basic parsing of OpenFlow messages. */
+
+struct ofputil_msg_type {
+ enum ofputil_msg_code code; /* OFPUTIL_*. */
+ uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */
+ const char *name; /* e.g. "OFPT_FLOW_REMOVED". */
+ unsigned int min_size; /* Minimum total message size in bytes. */
+ /* 0 if 'min_size' is the exact size that the message must be. Otherwise,
+ * the message may exceed 'min_size' by an even multiple of this value. */
+ unsigned int extra_multiple;
+};
+
+struct ofputil_msg_category {
+ const char *name; /* e.g. "OpenFlow message" */
+ const struct ofputil_msg_type *types;
+ size_t n_types;
+ int missing_error; /* ofp_mkerr() value for missing type. */
+};
+
+static bool
+ofputil_length_ok(const struct ofputil_msg_category *cat,
+ const struct ofputil_msg_type *type,
+ unsigned int size)
+{
+ switch (type->extra_multiple) {
+ case 0:
+ if (size != type->min_size) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect "
+ "length %u (expected length %u)",
+ cat->name, type->name, size, type->min_size);
+ return false;
+ }
+ return true;
+
+ case 1:
+ if (size < type->min_size) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect "
+ "length %u (expected length at least %u bytes)",
+ cat->name, type->name, size, type->min_size);
+ return false;
+ }
+ return true;
+
+ default:
+ if (size < type->min_size
+ || (size - type->min_size) % type->extra_multiple) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect "
+ "length %u (must be exactly %u bytes or longer "
+ "by an integer multiple of %u bytes)",
+ cat->name, type->name, size,
+ type->min_size, type->extra_multiple);
+ return false;
+ }
+ return true;
+ }
+}
+
+static int
+ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat,
+ uint32_t value, unsigned int size,
+ const struct ofputil_msg_type **typep)
+{
+ const struct ofputil_msg_type *type;
+
+ for (type = cat->types; type < &cat->types[cat->n_types]; type++) {
+ if (type->value == value) {
+ if (!ofputil_length_ok(cat, type, size)) {
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+ *typep = type;
+ return 0;
+ }
+ }
+
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32,
+ cat->name, value);
+ return cat->missing_error;
+}
+
+static int
+ofputil_decode_vendor(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ BUILD_ASSERT_DECL(sizeof(struct nxt_set_flow_format)
+ != sizeof(struct nxt_flow_mod_table_id));
+
+ static const struct ofputil_msg_type nxt_messages[] = {
+ { OFPUTIL_NXT_ROLE_REQUEST,
+ NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST",
+ sizeof(struct nx_role_request), 0 },
+
+ { OFPUTIL_NXT_ROLE_REPLY,
+ NXT_ROLE_REPLY, "NXT_ROLE_REPLY",
+ sizeof(struct nx_role_request), 0 },
+
+ { OFPUTIL_NXT_SET_FLOW_FORMAT,
+ NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT",
+ sizeof(struct nxt_set_flow_format), 0 },
+
+ { OFPUTIL_NXT_FLOW_MOD,
+ NXT_FLOW_MOD, "NXT_FLOW_MOD",
+ sizeof(struct nx_flow_mod), 8 },
+
+ { 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 = {
+ "Nicira extension message",
+ nxt_messages, ARRAY_SIZE(nxt_messages),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE)
+ };
+
+ const struct ofp_vendor_header *ovh;
+ const struct nicira_header *nh;
+
+ ovh = (const struct ofp_vendor_header *) oh;
+ if (ovh->vendor != htonl(NX_VENDOR_ID)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown "
+ "vendor %"PRIx32, ntohl(ovh->vendor));
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
+ }
+
+ if (ntohs(ovh->header.length) < sizeof(struct nicira_header)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of "
+ "length %u (expected at least %zu)",
+ ntohs(ovh->header.length), sizeof(struct nicira_header));
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+
+ nh = (const struct nicira_header *) oh;
+ 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_msg *osm = (const struct ofp_stats_msg *) oh;
+ ovs_be32 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(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);
+ }
+
+ return 0;
+}
+
+static int
+ofputil_decode_nxst_request(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type nxst_requests[] = {
+ { OFPUTIL_NXST_FLOW_REQUEST,
+ NXST_FLOW, "NXST_FLOW request",
+ sizeof(struct nx_flow_stats_request), 8 },
+
+ { OFPUTIL_NXST_AGGREGATE_REQUEST,
+ NXST_AGGREGATE, "NXST_AGGREGATE request",
+ sizeof(struct nx_aggregate_stats_request), 8 },
+ };
+
+ static const struct ofputil_msg_category nxst_request_category = {
+ "Nicira extension statistics request",
+ nxst_requests, ARRAY_SIZE(nxst_requests),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE)
+ };
+
+ const struct nicira_stats_msg *nsm;
+ int error;
+
+ error = check_nxstats_msg(oh);
+ if (error) {
+ return error;
+ }
+
+ nsm = (struct nicira_stats_msg *) oh;
+ return ofputil_lookup_openflow_message(&nxst_request_category,
+ ntohl(nsm->subtype),
+ ntohs(oh->length), typep);
+}
+
+static int
+ofputil_decode_nxst_reply(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type nxst_replies[] = {
+ { OFPUTIL_NXST_FLOW_REPLY,
+ NXST_FLOW, "NXST_FLOW reply",
+ sizeof(struct nicira_stats_msg), 8 },
+
+ { OFPUTIL_NXST_AGGREGATE_REPLY,
+ NXST_AGGREGATE, "NXST_AGGREGATE reply",
+ sizeof(struct nx_aggregate_stats_reply), 0 },
+ };
+
+ static const struct ofputil_msg_category nxst_reply_category = {
+ "Nicira extension statistics reply",
+ nxst_replies, ARRAY_SIZE(nxst_replies),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE)
+ };
+
+ const struct nicira_stats_msg *nsm;
+ int error;
+
+ error = check_nxstats_msg(oh);
+ if (error) {
+ return error;
+ }
+
+ nsm = (struct nicira_stats_msg *) oh;
+ return ofputil_lookup_openflow_message(&nxst_reply_category,
+ ntohl(nsm->subtype),
+ ntohs(oh->length), typep);
+}
+
+static int
+ofputil_decode_ofpst_request(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpst_requests[] = {
+ { OFPUTIL_OFPST_DESC_REQUEST,
+ OFPST_DESC, "OFPST_DESC request",
+ sizeof(struct ofp_stats_msg), 0 },
+
+ { OFPUTIL_OFPST_FLOW_REQUEST,
+ OFPST_FLOW, "OFPST_FLOW request",
+ sizeof(struct ofp_flow_stats_request), 0 },
+
+ { OFPUTIL_OFPST_AGGREGATE_REQUEST,
+ OFPST_AGGREGATE, "OFPST_AGGREGATE request",
+ sizeof(struct ofp_flow_stats_request), 0 },
+
+ { OFPUTIL_OFPST_TABLE_REQUEST,
+ OFPST_TABLE, "OFPST_TABLE request",
+ sizeof(struct ofp_stats_msg), 0 },
+
+ { OFPUTIL_OFPST_PORT_REQUEST,
+ OFPST_PORT, "OFPST_PORT request",
+ sizeof(struct ofp_port_stats_request), 0 },
+
+ { OFPUTIL_OFPST_QUEUE_REQUEST,
+ OFPST_QUEUE, "OFPST_QUEUE request",
+ sizeof(struct ofp_queue_stats_request), 0 },
+
+ { 0,
+ OFPST_VENDOR, "OFPST_VENDOR request",
+ sizeof(struct ofp_vendor_stats_msg), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpst_request_category = {
+ "OpenFlow statistics",
+ ofpst_requests, ARRAY_SIZE(ofpst_requests),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT)
+ };
+
+ const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh;
+ int error;
+
+ error = ofputil_lookup_openflow_message(&ofpst_request_category,
+ ntohs(request->type),
+ ntohs(oh->length), typep);
+ if (!error && request->type == htons(OFPST_VENDOR)) {
+ error = ofputil_decode_nxst_request(oh, typep);
+ }
+ return error;
+}
+
+static int
+ofputil_decode_ofpst_reply(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpst_replies[] = {
+ { OFPUTIL_OFPST_DESC_REPLY,
+ OFPST_DESC, "OFPST_DESC reply",
+ sizeof(struct ofp_desc_stats), 0 },
+
+ { OFPUTIL_OFPST_FLOW_REPLY,
+ OFPST_FLOW, "OFPST_FLOW reply",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { OFPUTIL_OFPST_AGGREGATE_REPLY,
+ OFPST_AGGREGATE, "OFPST_AGGREGATE reply",
+ sizeof(struct ofp_aggregate_stats_reply), 0 },
+
+ { OFPUTIL_OFPST_TABLE_REPLY,
+ OFPST_TABLE, "OFPST_TABLE reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) },
+
+ { OFPUTIL_OFPST_PORT_REPLY,
+ OFPST_PORT, "OFPST_PORT reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) },
+
+ { OFPUTIL_OFPST_QUEUE_REPLY,
+ OFPST_QUEUE, "OFPST_QUEUE reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) },
+
+ { 0,
+ OFPST_VENDOR, "OFPST_VENDOR reply",
+ sizeof(struct ofp_vendor_stats_msg), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpst_reply_category = {
+ "OpenFlow statistics",
+ ofpst_replies, ARRAY_SIZE(ofpst_replies),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT)
+ };
+
+ const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh;
+ int error;
+
+ error = ofputil_lookup_openflow_message(&ofpst_reply_category,
+ ntohs(reply->type),
+ ntohs(oh->length), typep);
+ if (!error && reply->type == htons(OFPST_VENDOR)) {
+ error = ofputil_decode_nxst_reply(oh, typep);
+ }
+ return error;
+}
+
+/* Decodes the message type represented by 'oh'. Returns 0 if successful or
+ * an OpenFlow error code constructed with ofp_mkerr() on failure. Either
+ * way, stores in '*typep' a type structure that can be inspected with the
+ * ofputil_msg_type_*() functions.
+ *
+ * oh->length must indicate the correct length of the message (and must be at
+ * least sizeof(struct ofp_header)).
+ *
+ * Success indicates that 'oh' is at least as long as the minimum-length
+ * message of its type. */
+int
+ofputil_decode_msg_type(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpt_messages[] = {
+ { OFPUTIL_OFPT_HELLO,
+ OFPT_HELLO, "OFPT_HELLO",
+ sizeof(struct ofp_hello), 1 },
+
+ { OFPUTIL_OFPT_ERROR,
+ OFPT_ERROR, "OFPT_ERROR",
+ sizeof(struct ofp_error_msg), 1 },
+
+ { OFPUTIL_OFPT_ECHO_REQUEST,
+ OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST",
+ sizeof(struct ofp_header), 1 },
+
+ { OFPUTIL_OFPT_ECHO_REPLY,
+ OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY",
+ sizeof(struct ofp_header), 1 },
+
+ { OFPUTIL_OFPT_FEATURES_REQUEST,
+ OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_FEATURES_REPLY,
+ OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
+ sizeof(struct ofp_switch_features), sizeof(struct ofp_phy_port) },
+
+ { OFPUTIL_OFPT_GET_CONFIG_REQUEST,
+ OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_GET_CONFIG_REPLY,
+ OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY",
+ sizeof(struct ofp_switch_config), 0 },
+
+ { OFPUTIL_OFPT_SET_CONFIG,
+ OFPT_SET_CONFIG, "OFPT_SET_CONFIG",
+ sizeof(struct ofp_switch_config), 0 },
+
+ { OFPUTIL_OFPT_PACKET_IN,
+ OFPT_PACKET_IN, "OFPT_PACKET_IN",
+ offsetof(struct ofp_packet_in, data), 1 },
+
+ { OFPUTIL_OFPT_FLOW_REMOVED,
+ OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED",
+ sizeof(struct ofp_flow_removed), 0 },
+
+ { OFPUTIL_OFPT_PORT_STATUS,
+ OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
+ sizeof(struct ofp_port_status), 0 },
+
+ { OFPUTIL_OFPT_PACKET_OUT,
+ OFPT_PACKET_OUT, "OFPT_PACKET_OUT",
+ sizeof(struct ofp_packet_out), 1 },
+
+ { OFPUTIL_OFPT_FLOW_MOD,
+ OFPT_FLOW_MOD, "OFPT_FLOW_MOD",
+ sizeof(struct ofp_flow_mod), 1 },
+
+ { OFPUTIL_OFPT_PORT_MOD,
+ OFPT_PORT_MOD, "OFPT_PORT_MOD",
+ sizeof(struct ofp_port_mod), 0 },
+
+ { 0,
+ OFPT_STATS_REQUEST, "OFPT_STATS_REQUEST",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { 0,
+ OFPT_STATS_REPLY, "OFPT_STATS_REPLY",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { OFPUTIL_OFPT_BARRIER_REQUEST,
+ OFPT_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_BARRIER_REPLY,
+ OFPT_BARRIER_REPLY, "OFPT_BARRIER_REPLY",
+ sizeof(struct ofp_header), 0 },
+
+ { 0,
+ OFPT_VENDOR, "OFPT_VENDOR",
+ sizeof(struct ofp_vendor_header), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpt_category = {
+ "OpenFlow message",
+ ofpt_messages, ARRAY_SIZE(ofpt_messages),
+ OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE)
+ };
+
+ int error;
+
+ error = ofputil_lookup_openflow_message(&ofpt_category, oh->type,
+ ntohs(oh->length), typep);
+ if (!error) {
+ switch (oh->type) {
+ case OFPT_VENDOR:
+ error = ofputil_decode_vendor(oh, typep);
+ break;
+
+ case OFPT_STATS_REQUEST:
+ error = ofputil_decode_ofpst_request(oh, typep);
+ break;
+
+ case OFPT_STATS_REPLY:
+ error = ofputil_decode_ofpst_reply(oh, typep);
+
+ default:
+ break;
+ }
+ }
+ if (error) {
+ static const struct ofputil_msg_type ofputil_invalid_type = {
+ OFPUTIL_MSG_INVALID,
+ 0, "OFPUTIL_MSG_INVALID",
+ 0, 0
+ };
+
+ *typep = &ofputil_invalid_type;
+ }
+ return error;
+}
+
+/* Returns an OFPUTIL_* message type code for 'type'. */
+enum ofputil_msg_code
+ofputil_msg_type_code(const struct ofputil_msg_type *type)
+{
+ return type->code;
+}
+\f
+/* Flow formats. */
+
+bool
+ofputil_flow_format_is_valid(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ case NXFF_NXM:
+ return true;
+ }
+
+ return false;
+}
+
+const char *
+ofputil_flow_format_to_string(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ return "openflow10";
+ case NXFF_NXM:
+ return "nxm";
+ default:
+ NOT_REACHED();
+ }
+}
+
+int
+ofputil_flow_format_from_string(const char *s)
+{
+ return (!strcmp(s, "openflow10") ? NXFF_OPENFLOW10
+ : !strcmp(s, "nxm") ? NXFF_NXM
+ : -1);
+}
+
+static bool
+regs_fully_wildcarded(const struct flow_wildcards *wc)
+{
+ int i;
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (wc->reg_masks[i] != 0) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Returns the minimum nx_flow_format to use for sending 'rule' to a switch
+ * (e.g. to add or remove a flow). Only NXM can handle tunnel IDs, registers,
+ * or fixing the Ethernet multicast bit. Otherwise, it's better to use
+ * NXFF_OPENFLOW10 for backward compatibility. */
+enum nx_flow_format
+ofputil_min_flow_format(const struct cls_rule *rule)
+{
+ const struct flow_wildcards *wc = &rule->wc;
+
+ /* Only NXM supports separately wildcards the Ethernet multicast bit. */
+ if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching ARP hardware addresses. */
+ if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching IPv6 traffic. */
+ if (!(wc->wildcards & FWW_DL_TYPE)
+ && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching registers. */
+ if (!regs_fully_wildcarded(wc)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching tun_id. */
+ if (wc->tun_id_mask != htonll(0)) {
+ return NXFF_NXM;
+ }
+
+ /* Other formats can express this rule. */
+ return NXFF_OPENFLOW10;
+}
+
+/* Returns an OpenFlow message that can be used to set the flow format to
+ * 'flow_format'. */
+struct ofpbuf *
+ofputil_make_set_flow_format(enum nx_flow_format flow_format)
+{
+ struct nxt_set_flow_format *sff;
+ struct ofpbuf *msg;
+
+ sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg);
+ sff->format = htonl(flow_format);
+
+ return msg;
+}
+
+/* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
+ * extension on or off (according to 'flow_mod_table_id'). */
+struct ofpbuf *
+ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
+{
+ struct nxt_flow_mod_table_id *nfmti;
+ struct ofpbuf *msg;
+
+ nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg);
+ nfmti->set = flow_mod_table_id;
+ return msg;
+}
+
+/* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
+ * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
+ * code.
+ *
+ * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is
+ * enabled, false otherwise.
+ *
+ * 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)
+{
+ const struct ofputil_msg_type *type;
+ uint16_t command;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ ofputil_decode_msg_type(oh, &type);
+ if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) {
+ /* Standard OpenFlow flow_mod. */
+ const struct ofp_flow_mod *ofm;
+ uint16_t priority;
+ int error;
+
+ /* Dissect the message. */
+ ofm = ofpbuf_pull(&b, sizeof *ofm);
+ error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
+ if (error) {
+ return error;
+ }
+
+ /* Set priority based on original wildcards. Normally we'd allow
+ * ofputil_cls_rule_from_match() to do this for us, but
+ * ofputil_normalize_rule() can put wildcards where the original flow
+ * didn't have them. */
+ priority = ntohs(ofm->priority);
+ if (!(ofm->match.wildcards & htonl(OFPFW_ALL))) {
+ priority = UINT16_MAX;
+ }
+
+ /* Translate the rule. */
+ ofputil_cls_rule_from_match(&ofm->match, priority, &fm->cr);
+ ofputil_normalize_rule(&fm->cr, NXFF_OPENFLOW10);
+
+ /* Translate the message. */
+ fm->cookie = ofm->cookie;
+ command = ntohs(ofm->command);
+ fm->idle_timeout = ntohs(ofm->idle_timeout);
+ fm->hard_timeout = ntohs(ofm->hard_timeout);
+ fm->buffer_id = ntohl(ofm->buffer_id);
+ fm->out_port = ntohs(ofm->out_port);
+ fm->flags = ntohs(ofm->flags);
+ } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) {
+ /* Nicira extended flow_mod. */
+ const struct nx_flow_mod *nfm;
+ int error;
+
+ /* Dissect the message. */
+ nfm = ofpbuf_pull(&b, sizeof *nfm);
+ error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority),
+ &fm->cr);
+ if (error) {
+ return error;
+ }
+ error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
+ if (error) {
+ return error;
+ }
+
+ /* Translate the message. */
+ fm->cookie = nfm->cookie;
+ command = ntohs(nfm->command);
+ fm->idle_timeout = ntohs(nfm->idle_timeout);
+ fm->hard_timeout = ntohs(nfm->hard_timeout);
+ fm->buffer_id = ntohl(nfm->buffer_id);
+ fm->out_port = ntohs(nfm->out_port);
+ fm->flags = ntohs(nfm->flags);
+ } else {
+ NOT_REACHED();
+ }
+
+ if (flow_mod_table_id) {
+ fm->command = command & 0xff;
+ fm->table_id = command >> 8;
+ } else {
+ fm->command = command;
+ fm->table_id = 0xff;
+ }
+
+ return 0;
+}
+
+/* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
+ * 'flow_format' and returns the message.
+ *
+ * '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,
+ enum nx_flow_format flow_format,
+ bool flow_mod_table_id)
+{
+ size_t actions_len = fm->n_actions * sizeof *fm->actions;
+ struct ofpbuf *msg;
+ uint16_t command;
+
+ command = (flow_mod_table_id
+ ? (fm->command & 0xff) | (fm->table_id << 8)
+ : fm->command);
+
+ if (flow_format == NXFF_OPENFLOW10) {
+ struct ofp_flow_mod *ofm;
+
+ msg = ofpbuf_new(sizeof *ofm + actions_len);
+ 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(command);
+ ofm->idle_timeout = htons(fm->idle_timeout);
+ ofm->hard_timeout = htons(fm->hard_timeout);
+ ofm->priority = htons(fm->cr.priority);
+ ofm->buffer_id = htonl(fm->buffer_id);
+ ofm->out_port = htons(fm->out_port);
+ ofm->flags = htons(fm->flags);
+ } else if (flow_format == NXFF_NXM) {
+ struct nx_flow_mod *nfm;
+ int match_len;
+
+ msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + actions_len);
+ put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg);
+ match_len = nx_put_match(msg, &fm->cr);
+
+ nfm = msg->data;
+ nfm->cookie = fm->cookie;
+ nfm->command = htons(command);
+ nfm->idle_timeout = htons(fm->idle_timeout);
+ nfm->hard_timeout = htons(fm->hard_timeout);
+ nfm->priority = htons(fm->cr.priority);
+ nfm->buffer_id = htonl(fm->buffer_id);
+ nfm->out_port = htons(fm->out_port);
+ nfm->flags = htons(fm->flags);
+ nfm->match_len = htons(match_len);
+ } else {
+ NOT_REACHED();
+ }
+
+ ofpbuf_put(msg, fm->actions, actions_len);
+ update_openflow_length(msg);
+ return msg;
+}
+
+static int
+ofputil_decode_ofpst_flow_request(struct flow_stats_request *fsr,
+ const struct ofp_header *oh,
+ bool aggregate)
+{
+ 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);
+ fsr->out_port = ntohs(ofsr->out_port);
+ fsr->table_id = ofsr->table_id;
+
+ return 0;
+}
+
+static int
+ofputil_decode_nxst_flow_request(struct flow_stats_request *fsr,
+ const struct ofp_header *oh,
+ bool aggregate)
+{
+ const struct nx_flow_stats_request *nfsr;
+ struct ofpbuf b;
+ int error;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ nfsr = ofpbuf_pull(&b, sizeof *nfsr);
+ error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &fsr->match);
+ if (error) {
+ return error;
+ }
+ if (b.size) {
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+
+ fsr->aggregate = aggregate;
+ fsr->out_port = ntohs(nfsr->out_port);
+ fsr->table_id = nfsr->table_id;
+
+ return 0;
+}
+
+/* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_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,
+ const struct ofp_header *oh)
+{
+ const struct ofputil_msg_type *type;
+ struct ofpbuf b;
+ int code;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ ofputil_decode_msg_type(oh, &type);
+ code = ofputil_msg_type_code(type);
+ switch (code) {
+ case OFPUTIL_OFPST_FLOW_REQUEST:
+ return ofputil_decode_ofpst_flow_request(fsr, oh, false);
+
+ case OFPUTIL_OFPST_AGGREGATE_REQUEST:
+ return ofputil_decode_ofpst_flow_request(fsr, oh, true);
+
+ case OFPUTIL_NXST_FLOW_REQUEST:
+ return ofputil_decode_nxst_flow_request(fsr, oh, false);
+
+ case OFPUTIL_NXST_AGGREGATE_REQUEST:
+ return ofputil_decode_nxst_flow_request(fsr, oh, true);
+
+ default:
+ /* Hey, the caller lied. */
+ NOT_REACHED();
+ }
}
+/* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
+ * 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,
+ enum nx_flow_format flow_format)
+{
+ struct ofpbuf *msg;
+
+ if (flow_format == NXFF_OPENFLOW10) {
+ struct ofp_flow_stats_request *ofsr;
+ int type;
+
+ type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW;
+ 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);
+ } else if (flow_format == NXFF_NXM) {
+ struct nx_flow_stats_request *nfsr;
+ int match_len;
+ int subtype;
+
+ subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW;
+ ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg);
+ match_len = nx_put_match(msg, &fsr->match);
+
+ nfsr = msg->data;
+ nfsr->out_port = htons(fsr->out_port);
+ nfsr->match_len = htons(match_len);
+ nfsr->table_id = fsr->table_id;
+ } else {
+ NOT_REACHED();
+ }
+
+ return msg;
+}
+
+/* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
+ * ofputil_flow_stats in 'fs'.
+ *
+ * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single
+ * OpenFlow message. Calling this function multiple times for a single 'msg'
+ * iterates through the replies. The caller must initially leave 'msg''s layer
+ * pointers null and not modify them between calls.
+ *
+ * Returns 0 if successful, EOF if no replies were left in this 'msg',
+ * otherwise a positive errno value. */
+int
+ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
+ struct ofpbuf *msg)
+{
+ const struct ofputil_msg_type *type;
+ int code;
+
+ ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type);
+ code = ofputil_msg_type_code(type);
+ if (!msg->l2) {
+ msg->l2 = msg->data;
+ if (code == OFPUTIL_OFPST_FLOW_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 {
+ NOT_REACHED();
+ }
+ }
+
+ if (!msg->size) {
+ return EOF;
+ } else if (code == OFPUTIL_OFPST_FLOW_REPLY) {
+ const struct ofp_flow_stats *ofs;
+ size_t length;
+
+ ofs = ofpbuf_try_pull(msg, sizeof *ofs);
+ if (!ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
+ "bytes at end", msg->size);
+ return EINVAL;
+ }
+
+ length = ntohs(ofs->length);
+ if (length < sizeof *ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
+ "length %zu", length);
+ return EINVAL;
+ }
+
+ if (ofputil_pull_actions(msg, length - sizeof *ofs,
+ &fs->actions, &fs->n_actions)) {
+ return EINVAL;
+ }
+
+ fs->cookie = get_32aligned_be64(&ofs->cookie);
+ ofputil_cls_rule_from_match(&ofs->match, ntohs(ofs->priority),
+ &fs->rule);
+ fs->table_id = ofs->table_id;
+ fs->duration_sec = ntohl(ofs->duration_sec);
+ fs->duration_nsec = ntohl(ofs->duration_nsec);
+ fs->idle_timeout = ntohs(ofs->idle_timeout);
+ fs->hard_timeout = ntohs(ofs->hard_timeout);
+ fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
+ fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
+ } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
+ const struct nx_flow_stats *nfs;
+ size_t match_len, length;
+
+ nfs = ofpbuf_try_pull(msg, sizeof *nfs);
+ if (!nfs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover "
+ "bytes at end", msg->size);
+ return EINVAL;
+ }
+
+ length = ntohs(nfs->length);
+ match_len = ntohs(nfs->match_len);
+ if (length < sizeof *nfs + ROUND_UP(match_len, 8)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu "
+ "claims invalid length %zu", match_len, length);
+ return EINVAL;
+ }
+ if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule)) {
+ return EINVAL;
+ }
+
+ if (ofputil_pull_actions(msg,
+ length - sizeof *nfs - ROUND_UP(match_len, 8),
+ &fs->actions, &fs->n_actions)) {
+ return EINVAL;
+ }
+
+ fs->cookie = nfs->cookie;
+ fs->table_id = nfs->table_id;
+ fs->duration_sec = ntohl(nfs->duration_sec);
+ fs->duration_nsec = ntohl(nfs->duration_nsec);
+ fs->idle_timeout = ntohs(nfs->idle_timeout);
+ fs->hard_timeout = ntohs(nfs->hard_timeout);
+ fs->packet_count = ntohll(nfs->packet_count);
+ fs->byte_count = ntohll(nfs->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ 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. */
+int
+ofputil_decode_flow_removed(struct ofputil_flow_removed *fr,
+ const struct ofp_header *oh)
+{
+ const struct ofputil_msg_type *type;
+ enum ofputil_msg_code code;
+
+ ofputil_decode_msg_type(oh, &type);
+ code = ofputil_msg_type_code(type);
+ if (code == OFPUTIL_OFPT_FLOW_REMOVED) {
+ const struct ofp_flow_removed *ofr;
+
+ ofr = (const struct ofp_flow_removed *) oh;
+ ofputil_cls_rule_from_match(&ofr->match, ntohs(ofr->priority),
+ &fr->rule);
+ fr->cookie = ofr->cookie;
+ fr->reason = ofr->reason;
+ fr->duration_sec = ntohl(ofr->duration_sec);
+ fr->duration_nsec = ntohl(ofr->duration_nsec);
+ fr->idle_timeout = ntohs(ofr->idle_timeout);
+ fr->packet_count = ntohll(ofr->packet_count);
+ fr->byte_count = ntohll(ofr->byte_count);
+ } else if (code == OFPUTIL_NXT_FLOW_REMOVED) {
+ struct nx_flow_removed *nfr;
+ struct ofpbuf b;
+ int error;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ nfr = ofpbuf_pull(&b, sizeof *nfr);
+ error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority),
+ &fr->rule);
+ if (error) {
+ return error;
+ }
+ if (b.size) {
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+
+ fr->cookie = nfr->cookie;
+ fr->reason = nfr->reason;
+ fr->duration_sec = ntohl(nfr->duration_sec);
+ fr->duration_nsec = ntohl(nfr->duration_nsec);
+ fr->idle_timeout = ntohs(nfr->idle_timeout);
+ fr->packet_count = ntohll(nfr->packet_count);
+ fr->byte_count = ntohll(nfr->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ return 0;
+}
+
+/* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or
+ * NXT_FLOW_REMOVED message 'oh' according to 'flow_format', and returns the
+ * message. */
+struct ofpbuf *
+ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr,
+ enum nx_flow_format flow_format)
+{
+ struct ofpbuf *msg;
+
+ if (flow_format == NXFF_OPENFLOW10) {
+ struct ofp_flow_removed *ofr;
+
+ ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0),
+ &msg);
+ ofputil_cls_rule_to_match(&fr->rule, &ofr->match);
+ ofr->cookie = fr->cookie;
+ ofr->priority = htons(fr->rule.priority);
+ ofr->reason = fr->reason;
+ 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(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;
+
+ make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &msg);
+ match_len = nx_put_match(msg, &fr->rule);
+
+ nfr = msg->data;
+ nfr->cookie = fr->cookie;
+ nfr->priority = htons(fr->rule.priority);
+ nfr->reason = fr->reason;
+ nfr->duration_sec = htonl(fr->duration_sec);
+ nfr->duration_nsec = htonl(fr->duration_nsec);
+ nfr->idle_timeout = htons(fr->idle_timeout);
+ nfr->match_len = htons(match_len);
+ nfr->packet_count = htonll(fr->packet_count);
+ nfr->byte_count = htonll(fr->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ return msg;
+}
+
+/* Converts abstract ofputil_packet_in 'pin' into an OFPT_PACKET_IN message
+ * and returns the message.
+ *
+ * If 'rw_packet' is NULL, the caller takes ownership of the newly allocated
+ * returned ofpbuf.
+ *
+ * If 'rw_packet' is nonnull, then it must contain the same data as
+ * pin->packet. 'rw_packet' is allowed to be the same ofpbuf as pin->packet.
+ * It is modified in-place into an OFPT_PACKET_IN message according to 'pin',
+ * and then ofputil_encode_packet_in() returns 'rw_packet'. If 'rw_packet' has
+ * enough headroom to insert a "struct ofp_packet_in", this is more efficient
+ * than ofputil_encode_packet_in() because it does not copy the packet
+ * payload. */
+struct ofpbuf *
+ofputil_encode_packet_in(const struct ofputil_packet_in *pin,
+ struct ofpbuf *rw_packet)
+{
+ int total_len = pin->packet->size;
+ struct ofp_packet_in *opi;
+
+ if (rw_packet) {
+ if (pin->send_len < rw_packet->size) {
+ rw_packet->size = pin->send_len;
+ }
+ } else {
+ rw_packet = ofpbuf_clone_data_with_headroom(
+ pin->packet->data, MIN(pin->send_len, pin->packet->size),
+ offsetof(struct ofp_packet_in, data));
+ }
+
+ /* Add OFPT_PACKET_IN. */
+ opi = ofpbuf_push_zeros(rw_packet, offsetof(struct ofp_packet_in, data));
+ opi->header.version = OFP_VERSION;
+ opi->header.type = OFPT_PACKET_IN;
+ opi->total_len = htons(total_len);
+ opi->in_port = htons(pin->in_port);
+ opi->reason = pin->reason;
+ opi->buffer_id = htonl(pin->buffer_id);
+ update_openflow_length(rw_packet);
+
+ return rw_packet;
+}
+
+/* Returns a string representing the message type of 'type'. The string is the
+ * enumeration constant for the type, e.g. "OFPT_HELLO". For statistics
+ * messages, the constant is followed by "request" or "reply",
+ * e.g. "OFPST_AGGREGATE reply". */
+const char *
+ofputil_msg_type_name(const struct ofputil_msg_type *type)
+{
+ return type->name;
+}
+\f
/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
* 'openflow_len', starting with an OpenFlow header with the given 'type' and
* an arbitrary transaction id. Allocated bytes beyond the header, if any, are
*
* Returns the header. */
void *
-make_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
+make_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
struct ofpbuf **bufferp)
{
*bufferp = ofpbuf_new(openflow_len);
/* Similar to make_openflow_xid() but creates a Nicira vendor extension message
* with the specific 'subtype'. 'subtype' should be in host byte order. */
void *
-make_nxmsg_xid(size_t openflow_len, uint32_t subtype, uint32_t xid,
+make_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
struct ofpbuf **bufferp)
{
- struct nicira_header *nxh = make_openflow_xid(openflow_len, OFPT_VENDOR,
- xid, bufferp);
- nxh->vendor = htonl(NX_VENDOR_ID);
- nxh->subtype = htonl(subtype);
- return nxh;
+ *bufferp = ofpbuf_new(openflow_len);
+ return put_nxmsg_xid(openflow_len, subtype, xid, *bufferp);
}
/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
*
* Returns the header. */
void *
-put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf *buffer)
+put_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
+ struct ofpbuf *buffer)
+{
+ struct ofp_header *oh;
+
+ assert(openflow_len >= sizeof *oh);
+ assert(openflow_len <= UINT16_MAX);
+
+ oh = ofpbuf_put_uninit(buffer, openflow_len);
+ oh->version = OFP_VERSION;
+ oh->type = type;
+ oh->length = htons(openflow_len);
+ oh->xid = xid;
+ memset(oh + 1, 0, openflow_len - sizeof *oh);
+ return oh;
+}
+
+/* Similar to put_openflow() but append a Nicira vendor extension message with
+ * the specific 'subtype'. 'subtype' should be in host byte order. */
+void *
+put_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf *buffer)
+{
+ return put_nxmsg_xid(openflow_len, subtype, alloc_xid(), buffer);
+}
+
+/* Similar to put_openflow_xid() but append a Nicira vendor extension message
+ * with the specific 'subtype'. 'subtype' should be in host byte order. */
+void *
+put_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
+ struct ofpbuf *buffer)
+{
+ struct nicira_header *nxh;
+
+ nxh = put_openflow_xid(openflow_len, OFPT_VENDOR, xid, buffer);
+ nxh->vendor = htonl(NX_VENDOR_ID);
+ nxh->subtype = htonl(subtype);
+ return nxh;
+}
+
+/* Updates the 'length' field of the OpenFlow message in 'buffer' to
+ * 'buffer->size'. */
+void
+update_openflow_length(struct ofpbuf *buffer)
+{
+ struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
+ oh->length = htons(buffer->size);
+}
+
+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 openflow_len, uint16_t ofpst_type,
+ uint32_t nxst_subtype, struct ofpbuf **bufferp)
+{
+ 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;
+}
+
+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_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 ofpbuf *msg = ofpbuf_from_list(list_back(replies));
+ struct ofp_stats_msg *osm = msg->data;
+
+ 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;
+}
+
+/* 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)
{
- struct ofp_header *oh;
+ return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len);
+}
- assert(openflow_len >= sizeof *oh);
- assert(openflow_len <= UINT16_MAX);
+/* 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_msg *) oh + 1;
+}
- oh = ofpbuf_put_uninit(buffer, openflow_len);
- oh->version = OFP_VERSION;
- oh->type = type;
- oh->length = htons(openflow_len);
- oh->xid = xid;
- memset(oh + 1, 0, openflow_len - sizeof *oh);
- return 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_msg);
}
-/* Updates the 'length' field of the OpenFlow message in 'buffer' to
- * 'buffer->size'. */
-void
-update_openflow_length(struct ofpbuf *buffer)
+/* Returns the first byte past the nicira_stats_msg header in 'oh'. */
+const void *
+ofputil_nxstats_body(const struct ofp_header *oh)
{
- struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
- oh->length = htons(buffer->size);
+ assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY);
+ return ((const struct nicira_stats_msg *) oh) + 1;
+}
+
+/* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */
+size_t
+ofputil_nxstats_body_len(const struct ofp_header *oh)
+{
+ assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY);
+ return ntohs(oh->length) - sizeof(struct nicira_stats_msg);
}
struct ofpbuf *
-make_flow_mod(uint16_t command, const struct flow *flow, size_t actions_len)
+make_flow_mod(uint16_t command, const struct cls_rule *rule,
+ size_t actions_len)
{
struct ofp_flow_mod *ofm;
size_t size = sizeof *ofm + actions_len;
ofm->header.type = OFPT_FLOW_MOD;
ofm->header.length = htons(size);
ofm->cookie = 0;
- ofm->match.wildcards = htonl(0);
- ofm->match.in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
- : flow->in_port);
- memcpy(ofm->match.dl_src, flow->dl_src, sizeof ofm->match.dl_src);
- memcpy(ofm->match.dl_dst, flow->dl_dst, sizeof ofm->match.dl_dst);
- ofm->match.dl_vlan = flow->dl_vlan;
- ofm->match.dl_vlan_pcp = flow->dl_vlan_pcp;
- ofm->match.dl_type = flow->dl_type;
- ofm->match.nw_src = flow->nw_src;
- ofm->match.nw_dst = flow->nw_dst;
- ofm->match.nw_proto = flow->nw_proto;
- ofm->match.nw_tos = flow->nw_tos;
- ofm->match.tp_src = flow->tp_src;
- ofm->match.tp_dst = flow->tp_dst;
+ ofm->priority = htons(MIN(rule->priority, UINT16_MAX));
+ ofputil_cls_rule_to_match(rule, &ofm->match);
ofm->command = htons(command);
return out;
}
struct ofpbuf *
-make_add_flow(const struct flow *flow, uint32_t buffer_id,
+make_add_flow(const struct cls_rule *rule, uint32_t buffer_id,
uint16_t idle_timeout, size_t actions_len)
{
- struct ofpbuf *out = make_flow_mod(OFPFC_ADD, flow, actions_len);
+ struct ofpbuf *out = make_flow_mod(OFPFC_ADD, rule, actions_len);
struct ofp_flow_mod *ofm = out->data;
ofm->idle_timeout = htons(idle_timeout);
ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
}
struct ofpbuf *
-make_del_flow(const struct flow *flow)
+make_del_flow(const struct cls_rule *rule)
{
- struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, flow, 0);
+ struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, rule, 0);
struct ofp_flow_mod *ofm = out->data;
ofm->out_port = htons(OFPP_NONE);
return out;
}
struct ofpbuf *
-make_add_simple_flow(const struct flow *flow,
+make_add_simple_flow(const struct cls_rule *rule,
uint32_t buffer_id, uint16_t out_port,
uint16_t idle_timeout)
{
struct ofp_action_output *oao;
struct ofpbuf *buffer;
- buffer = make_add_flow(flow, buffer_id, idle_timeout, sizeof *oao);
+ 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);
return buffer;
} else {
- return make_add_flow(flow, buffer_id, idle_timeout, 0);
+ return make_add_flow(rule, buffer_id, idle_timeout, 0);
}
}
rq->version = OFP_VERSION;
rq->type = OFPT_ECHO_REQUEST;
rq->length = htons(sizeof *rq);
- rq->xid = 0;
+ rq->xid = htonl(0);
return out;
}
return out;
}
-static int
-check_message_type(uint8_t got_type, uint8_t want_type)
-{
- if (got_type != want_type) {
- char *want_type_name = ofp_message_type_to_string(want_type);
- char *got_type_name = ofp_message_type_to_string(got_type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received bad message type %s (expected %s)",
- got_type_name, want_type_name);
- free(want_type_name);
- free(got_type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
- }
- return 0;
-}
-
-/* Checks that 'msg' has type 'type' and that it is exactly 'size' bytes long.
- * Returns 0 if the checks pass, otherwise an OpenFlow error code (produced
- * with ofp_mkerr()). */
-int
-check_ofp_message(const struct ofp_header *msg, uint8_t type, size_t size)
-{
- size_t got_size;
- int error;
-
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
- }
-
- got_size = ntohs(msg->length);
- if (got_size != size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of length %zu (expected %zu)",
- type_name, got_size, size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
-
- return 0;
-}
-
-/* Checks that 'msg' has type 'type' and that 'msg' is 'size' plus a
- * nonnegative integer multiple of 'array_elt_size' bytes long. Returns 0 if
- * the checks pass, otherwise an OpenFlow error code (produced with
- * ofp_mkerr()).
- *
- * If 'n_array_elts' is nonnull, then '*n_array_elts' is set to the number of
- * 'array_elt_size' blocks in 'msg' past the first 'min_size' bytes, when
- * successful. */
-int
-check_ofp_message_array(const struct ofp_header *msg, uint8_t type,
- size_t min_size, size_t array_elt_size,
- size_t *n_array_elts)
-{
- size_t got_size;
- int error;
-
- assert(array_elt_size);
-
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
- }
-
- got_size = ntohs(msg->length);
- if (got_size < min_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl, "received %s message of length %zu "
- "(expected at least %zu)",
- type_name, got_size, min_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if ((got_size - min_size) % array_elt_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of bad length %zu: the "
- "excess over %zu (%zu) is not evenly divisible by %zu "
- "(remainder is %zu)",
- type_name, got_size, min_size, got_size - min_size,
- array_elt_size, (got_size - min_size) % array_elt_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if (n_array_elts) {
- *n_array_elts = (got_size - min_size) / array_elt_size;
- }
- return 0;
-}
-
-const struct ofp_flow_stats *
-flow_stats_first(struct flow_stats_iterator *iter,
- const struct ofp_stats_reply *osr)
-{
- iter->pos = osr->body;
- iter->end = osr->body + (ntohs(osr->header.length)
- - offsetof(struct ofp_stats_reply, body));
- return flow_stats_next(iter);
-}
-
-const struct ofp_flow_stats *
-flow_stats_next(struct flow_stats_iterator *iter)
-{
- ptrdiff_t bytes_left = iter->end - iter->pos;
- const struct ofp_flow_stats *fs;
- size_t length;
-
- if (bytes_left < sizeof *fs) {
- if (bytes_left != 0) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "%td leftover bytes in flow stats reply", bytes_left);
- }
- return NULL;
- }
-
- fs = (const void *) iter->pos;
- length = ntohs(fs->length);
- if (length < sizeof *fs) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu is shorter than "
- "min %zu", length, sizeof *fs);
- return NULL;
- } else if (length > bytes_left) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu but only %td "
- "bytes left", length, bytes_left);
- return NULL;
- } else if ((length - sizeof *fs) % sizeof fs->actions[0]) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu has %zu bytes "
- "left over in final action", length,
- (length - sizeof *fs) % sizeof fs->actions[0]);
- return NULL;
- }
- iter->pos += length;
- return fs;
-}
-
-static int
-check_action_exact_len(const union ofp_action *a, unsigned int len,
- unsigned int required_len)
-{
- if (len != required_len) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action %u has invalid length %"PRIu16" (must be %u)\n",
- a->type, ntohs(a->header.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. */
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)
-{
- const struct ofp_action_enqueue *oae;
- uint16_t port;
- int error;
-
- error = check_action_exact_len(a, len, 16);
- if (error) {
- return error;
- }
-
- oae = (const struct ofp_action_enqueue *) a;
- port = ntohs(oae->port);
- if (port < max_ports || port == OFPP_IN_PORT) {
- return 0;
- }
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown enqueue port %x", port);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
-}
-
-static int
-check_nicira_action(const union ofp_action *a, unsigned int len,
- const struct flow *flow)
+int
+validate_actions(const union ofp_action *actions, size_t n_actions,
+ const struct flow *flow, int max_ports)
{
- const struct nx_action_header *nah;
- int error;
+ const union ofp_action *a;
+ size_t left;
- if (len < 16) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "Nicira vendor action only %u bytes", len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
- nah = (const struct nx_action_header *) a;
+ OFPUTIL_ACTION_FOR_EACH (a, left, actions, n_actions) {
+ uint16_t port;
+ int error;
+ int code;
- switch (ntohs(nah->subtype)) {
- case NXAST_RESUBMIT:
- case NXAST_SET_TUNNEL:
- case NXAST_DROP_SPOOFED_ARP:
- case NXAST_SET_QUEUE:
- case NXAST_POP_QUEUE:
- return check_action_exact_len(a, len, 16);
+ code = ofputil_decode_action(a);
+ if (code < 0) {
+ char *msg;
- case NXAST_REG_MOVE:
- error = check_action_exact_len(a, len,
- sizeof(struct nx_action_reg_move));
- if (error) {
- return error;
- }
- return nxm_check_reg_move((const struct nx_action_reg_move *) a, flow);
+ 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_action_exact_len(a, 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 = check_output_port(ntohs(a->output.port), max_ports);
+ break;
- default:
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
- }
-}
+ case OFPUTIL_OFPAT_SET_VLAN_VID:
+ if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
+ error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+ }
+ break;
-static int
-check_action(const union ofp_action *a, unsigned int len,
- const struct flow *flow, int max_ports)
-{
- int error;
+ case OFPUTIL_OFPAT_SET_VLAN_PCP:
+ if (a->vlan_pcp.vlan_pcp & ~7) {
+ error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+ }
+ break;
- switch (ntohs(a->type)) {
- case OFPAT_OUTPUT:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
+ 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);
+ break;
+
+ case OFPUTIL_NXAST_AUTOPATH:
+ error = autopath_check((const struct nx_action_autopath *) 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 check_output_port(ntohs(a->output.port), max_ports);
- case OFPAT_SET_VLAN_VID:
- error = check_action_exact_len(a, len, 8);
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;
}
- if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
- }
- return 0;
+ }
+ 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;
+}
- case OFPAT_SET_VLAN_PCP:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
- }
- if (a->vlan_vid.vlan_vid & ~7) {
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
- }
- return 0;
+struct ofputil_ofpat_action {
+ enum ofputil_action_code code;
+ unsigned int len;
+};
+
+static const struct ofputil_ofpat_action ofpat_actions[] = {
+ { OFPUTIL_OFPAT_OUTPUT, 8 },
+ { OFPUTIL_OFPAT_SET_VLAN_VID, 8 },
+ { OFPUTIL_OFPAT_SET_VLAN_PCP, 8 },
+ { OFPUTIL_OFPAT_STRIP_VLAN, 8 },
+ { OFPUTIL_OFPAT_SET_DL_SRC, 16 },
+ { OFPUTIL_OFPAT_SET_DL_DST, 16 },
+ { OFPUTIL_OFPAT_SET_NW_SRC, 8 },
+ { OFPUTIL_OFPAT_SET_NW_DST, 8 },
+ { OFPUTIL_OFPAT_SET_NW_TOS, 8 },
+ { OFPUTIL_OFPAT_SET_TP_SRC, 8 },
+ { OFPUTIL_OFPAT_SET_TP_DST, 8 },
+ { OFPUTIL_OFPAT_ENQUEUE, 16 },
+};
+
+struct ofputil_nxast_action {
+ enum ofputil_action_code code;
+ unsigned int min_len;
+ unsigned int max_len;
+};
+
+static const struct ofputil_nxast_action nxast_actions[] = {
+ { 0, UINT_MAX, UINT_MAX }, /* NXAST_SNAT__OBSOLETE */
+ { OFPUTIL_NXAST_RESUBMIT, 16, 16 },
+ { OFPUTIL_NXAST_SET_TUNNEL, 16, 16 },
+ { 0, UINT_MAX, UINT_MAX }, /* NXAST_DROP_SPOOFED_ARP__OBSOLETE */
+ { OFPUTIL_NXAST_SET_QUEUE, 16, 16 },
+ { OFPUTIL_NXAST_POP_QUEUE, 16, 16 },
+ { OFPUTIL_NXAST_REG_MOVE, 24, 24 },
+ { OFPUTIL_NXAST_REG_LOAD, 24, 24 },
+ { OFPUTIL_NXAST_NOTE, 16, UINT_MAX },
+ { OFPUTIL_NXAST_SET_TUNNEL64, 24, 24 },
+ { OFPUTIL_NXAST_MULTIPATH, 32, 32 },
+ { OFPUTIL_NXAST_AUTOPATH, 24, 24 },
+};
- 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);
+static int
+ofputil_decode_ofpat_action(const union ofp_action *a)
+{
+ int type = ntohs(a->type);
- case OFPAT_SET_DL_SRC:
- case OFPAT_SET_DL_DST:
- return check_action_exact_len(a, len, 16);
+ if (type < ARRAY_SIZE(ofpat_actions)) {
+ const struct ofputil_ofpat_action *ooa = &ofpat_actions[type];
+ unsigned int 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));
+ return (len == ooa->len
+ ? ooa->code
+ : -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN));
+ } else {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+ }
+}
- case OFPAT_ENQUEUE:
- return check_enqueue_action(a, len, max_ports);
+static int
+ofputil_decode_nxast_action(const union ofp_action *a)
+{
+ unsigned int len = ntohs(a->header.len);
- default:
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown action type %"PRIu16,
- ntohs(a->type));
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+ if (len < sizeof(struct nx_action_header)) {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ } else {
+ const struct nx_action_header *nah = (const void *) a;
+ int subtype = ntohs(nah->subtype);
+
+ if (subtype <= ARRAY_SIZE(nxast_actions)) {
+ const struct ofputil_nxast_action *ona = &nxast_actions[subtype];
+ if (len >= ona->min_len && len <= ona->max_len) {
+ return ona->code;
+ } else if (ona->min_len == UINT_MAX) {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+ } else {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ } else {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+ }
}
}
+/* 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
-validate_actions(const union ofp_action *actions, size_t n_actions,
- const struct flow *flow, int max_ports)
+ofputil_decode_action(const union ofp_action *a)
{
- size_t i;
+ if (a->type != htons(OFPAT_VENDOR)) {
+ return ofputil_decode_ofpat_action(a);
+ } else if (a->vendor.vendor == htonl(NX_VENDOR_ID)) {
+ return ofputil_decode_nxast_action(a);
+ } else {
+ return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR);
+ }
+}
- 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;
+/* 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)
+{
+ if (a->type != htons(OFPAT_VENDOR)) {
+ return ofpat_actions[ntohs(a->type)].code;
+ } else {
+ const struct nx_action_header *nah = (const void *) a;
- if (n_slots > slots_left) {
- VLOG_DBG_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_DBG_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_DBG_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);
- }
-
- error = check_action(a, len, flow, max_ports);
- if (error) {
- return error;
- }
- i += n_slots;
+ return nxast_actions[ntohs(nah->subtype)].code;
}
- return 0;
}
-/* Returns true if 'action' outputs to 'port' (which must be in network byte
- * order), false otherwise. */
+/* Returns true if 'action' outputs to 'port', false otherwise. */
bool
-action_outputs_to_port(const union ofp_action *action, uint16_t port)
+action_outputs_to_port(const union ofp_action *action, ovs_be16 port)
{
switch (ntohs(action->type)) {
case OFPAT_OUTPUT:
}
}
-/* 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
+ * level may be specified. For example, ARP does not have a TOS field,
+ * so nw_tos must be wildcarded if 'rule' specifies an ARP flow.
+ * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and
+ * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an
+ * IPv4 flow.
+ *
+ * 2. If the type of level N is not known (or not understood by Open
+ * vSwitch), then no fields at all for that level may be specified. For
+ * example, Open vSwitch does not understand SCTP, an L4 protocol, so the
+ * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an
+ * SCTP flow.
+ *
+ * 'flow_format' specifies the format of the flow as received or as intended to
+ * be sent. This is important for IPv6 and ARP, for which NXM supports more
+ * detailed matching. */
void
-normalize_match(struct ofp_match *m)
-{
- enum { OFPFW_NW = (OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK | OFPFW_NW_PROTO
- | OFPFW_NW_TOS) };
- enum { OFPFW_TP = OFPFW_TP_SRC | OFPFW_TP_DST };
- uint32_t wc;
-
- wc = ntohl(m->wildcards) & OVSFW_ALL;
- if (wc & OFPFW_DL_TYPE) {
- m->dl_type = 0;
-
- /* Can't sensibly match on network or transport headers if the
- * data link type is unknown. */
- wc |= OFPFW_NW | OFPFW_TP;
- m->nw_src = m->nw_dst = m->nw_proto = m->nw_tos = 0;
- m->tp_src = m->tp_dst = 0;
- } else if (m->dl_type == htons(ETH_TYPE_IP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
-
- /* Can't sensibly match on transport headers if the network
- * protocol is unknown. */
- wc |= OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- } else if (m->nw_proto == IPPROTO_TCP ||
- m->nw_proto == IPPROTO_UDP ||
- m->nw_proto == IPPROTO_ICMP) {
- if (wc & OFPFW_TP_SRC) {
- m->tp_src = 0;
- }
- if (wc & OFPFW_TP_DST) {
- m->tp_dst = 0;
- }
- } else {
- /* Transport layer fields will always be extracted as zeros, so we
- * can do an exact-match on those values. */
- wc &= ~OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- }
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
- }
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
- }
- if (wc & OFPFW_NW_TOS) {
- m->nw_tos = 0;
- } else {
- m->nw_tos &= IP_DSCP_MASK;
- }
- } else if (m->dl_type == htons(ETH_TYPE_ARP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
+ofputil_normalize_rule(struct cls_rule *rule, enum nx_flow_format flow_format)
+{
+ enum {
+ MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */
+ MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */
+ MAY_NW_PROTO = 1 << 2, /* nw_proto */
+ MAY_NW_TOS = 1 << 3, /* nw_tos */
+ MAY_ARP_SHA = 1 << 4, /* arp_sha */
+ MAY_ARP_THA = 1 << 5, /* arp_tha */
+ MAY_IPV6_ADDR = 1 << 6, /* ipv6_src, ipv6_dst */
+ MAY_ND_TARGET = 1 << 7 /* nd_target */
+ } may_match;
+
+ struct flow_wildcards wc;
+
+ /* Figure out what fields may be matched. */
+ if (rule->flow.dl_type == htons(ETH_TYPE_IP)) {
+ may_match = MAY_NW_PROTO | MAY_NW_TOS | MAY_NW_ADDR;
+ if (rule->flow.nw_proto == IPPROTO_TCP ||
+ rule->flow.nw_proto == IPPROTO_UDP ||
+ rule->flow.nw_proto == IPPROTO_ICMP) {
+ may_match |= MAY_TP_ADDR;
}
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
+ } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)
+ && flow_format == NXFF_NXM) {
+ may_match = MAY_NW_PROTO | MAY_NW_TOS | MAY_IPV6_ADDR;
+ if (rule->flow.nw_proto == IPPROTO_TCP ||
+ rule->flow.nw_proto == IPPROTO_UDP) {
+ may_match |= MAY_TP_ADDR;
+ } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) {
+ may_match |= MAY_TP_ADDR;
+ if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
+ may_match |= MAY_ND_TARGET | MAY_ARP_SHA;
+ } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) {
+ may_match |= MAY_ND_TARGET | MAY_ARP_THA;
+ }
}
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
+ } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) {
+ may_match = MAY_NW_PROTO | MAY_NW_ADDR;
+ if (flow_format == NXFF_NXM) {
+ may_match |= MAY_ARP_SHA | MAY_ARP_THA;
}
- m->tp_src = m->tp_dst = m->nw_tos = 0;
} else {
- /* Network and transport layer fields will always be extracted as
- * zeros, so we can do an exact-match on those values. */
- wc &= ~(OFPFW_NW | OFPFW_TP);
- m->nw_proto = m->nw_src = m->nw_dst = m->nw_tos = 0;
- m->tp_src = m->tp_dst = 0;
+ may_match = 0;
}
- if (wc & OFPFW_DL_SRC) {
- memset(m->dl_src, 0, sizeof m->dl_src);
+
+ /* Clear the fields that may not be matched. */
+ wc = rule->wc;
+ if (!(may_match & MAY_NW_ADDR)) {
+ wc.nw_src_mask = wc.nw_dst_mask = htonl(0);
}
- if (wc & OFPFW_DL_DST) {
- memset(m->dl_dst, 0, sizeof m->dl_dst);
+ if (!(may_match & MAY_TP_ADDR)) {
+ wc.wildcards |= FWW_TP_SRC | FWW_TP_DST;
+ }
+ if (!(may_match & MAY_NW_PROTO)) {
+ wc.wildcards |= FWW_NW_PROTO;
+ }
+ if (!(may_match & MAY_NW_TOS)) {
+ wc.wildcards |= FWW_NW_TOS;
+ }
+ if (!(may_match & MAY_ARP_SHA)) {
+ wc.wildcards |= FWW_ARP_SHA;
+ }
+ if (!(may_match & MAY_ARP_THA)) {
+ wc.wildcards |= FWW_ARP_THA;
+ }
+ if (!(may_match & MAY_IPV6_ADDR)) {
+ wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any;
+ }
+ if (!(may_match & MAY_ND_TARGET)) {
+ wc.wildcards |= FWW_ND_TARGET;
}
- m->wildcards = htonl(wc);
-}
-/* Returns a string that describes 'match' in a very literal way, without
- * interpreting its contents except in a very basic fashion. The returned
- * string is intended to be fixed-length, so that it is easy to see differences
- * between two such strings if one is put above another. This is useful for
- * describing changes made by normalize_match().
- *
- * The caller must free the returned string (with free()). */
-char *
-ofp_match_to_literal_string(const struct ofp_match *match)
-{
- return xasprintf("wildcards=%#10"PRIx32" "
- " in_port=%5"PRId16" "
- " dl_src="ETH_ADDR_FMT" "
- " dl_dst="ETH_ADDR_FMT" "
- " dl_vlan=%5"PRId16" "
- " dl_vlan_pcp=%3"PRId8" "
- " dl_type=%#6"PRIx16" "
- " nw_tos=%#4"PRIx8" "
- " nw_proto=%#4"PRIx16" "
- " nw_src=%#10"PRIx32" "
- " nw_dst=%#10"PRIx32" "
- " tp_src=%5"PRId16" "
- " tp_dst=%5"PRId16,
- ntohl(match->wildcards),
- ntohs(match->in_port),
- ETH_ADDR_ARGS(match->dl_src),
- ETH_ADDR_ARGS(match->dl_dst),
- ntohs(match->dl_vlan),
- match->dl_vlan_pcp,
- ntohs(match->dl_type),
- match->nw_tos,
- match->nw_proto,
- ntohl(match->nw_src),
- ntohl(match->nw_dst),
- ntohs(match->tp_src),
- ntohs(match->tp_dst));
+ /* Log any changes. */
+ if (!flow_wildcards_equal(&wc, &rule->wc)) {
+ bool log = !VLOG_DROP_INFO(&bad_ofmsg_rl);
+ char *pre = log ? cls_rule_to_string(rule) : NULL;
+
+ rule->wc = wc;
+ cls_rule_zero_wildcarded_fields(rule);
+
+ if (log) {
+ char *post = cls_rule_to_string(rule);
+ VLOG_INFO("normalization changed ofp_match, details:");
+ VLOG_INFO(" pre: %s", pre);
+ VLOG_INFO("post: %s", post);
+ free(pre);
+ free(post);
+ }
+ }
}
static uint32_t
}
}
+static int
+vendor_id_to_code(uint32_t id)
+{
+ switch (id) {
+#define OFPUTIL_VENDOR(NAME, VENDOR_ID) case VENDOR_ID: return NAME;
+ OFPUTIL_VENDORS
+#undef OFPUTIL_VENDOR
+ default:
+ return -1;
+ }
+}
+
/* Creates and returns an OpenFlow message of type OFPT_ERROR with the error
* information taken from 'error', whose encoding must be as described in the
* large comment in ofp-util.h. If 'oh' is nonnull, then the error will use
*
* Returns NULL if 'error' is not an OpenFlow error code. */
struct ofpbuf *
-make_ofp_error_msg(int error, const struct ofp_header *oh)
+ofputil_encode_error_msg(int error, const struct ofp_header *oh)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
uint8_t vendor;
uint16_t type;
uint16_t code;
- uint32_t xid;
+ ovs_be32 xid;
if (!is_ofp_error(error)) {
/* We format 'error' with strerror() here since it seems likely to be
oem->type = htons(NXET_VENDOR);
oem->code = htons(NXVC_VENDOR_ERROR);
- nve = ofpbuf_put_uninit(buf, sizeof *nve);
+ nve = (struct nx_vendor_error *)oem->data;
nve->vendor = htonl(vendor_id);
nve->type = htons(type);
nve->code = htons(code);
}
if (len) {
+ buf->size -= len;
ofpbuf_put(buf, data, len);
}
return buf;
}
+/* Decodes 'oh', which should be an OpenFlow OFPT_ERROR message, and returns an
+ * Open vSwitch internal error code in the format described in the large
+ * comment in ofp-util.h.
+ *
+ * If 'payload_ofs' is nonnull, on success '*payload_ofs' is set to the offset
+ * to the payload starting from 'oh' and on failure it is set to 0. */
+int
+ofputil_decode_error_msg(const struct ofp_header *oh, size_t *payload_ofs)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
+ const struct ofp_error_msg *oem;
+ uint16_t type, code;
+ struct ofpbuf b;
+ int vendor;
+
+ if (payload_ofs) {
+ *payload_ofs = 0;
+ }
+ if (oh->type != OFPT_ERROR) {
+ return EPROTO;
+ }
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ oem = ofpbuf_try_pull(&b, sizeof *oem);
+ if (!oem) {
+ return EPROTO;
+ }
+
+ type = ntohs(oem->type);
+ code = ntohs(oem->code);
+ if (type == NXET_VENDOR && code == NXVC_VENDOR_ERROR) {
+ const struct nx_vendor_error *nve = ofpbuf_try_pull(&b, sizeof *nve);
+ if (!nve) {
+ return EPROTO;
+ }
+
+ vendor = vendor_id_to_code(ntohl(nve->vendor));
+ if (vendor < 0) {
+ VLOG_WARN_RL(&rl, "error contains unknown vendor ID %#"PRIx32,
+ ntohl(nve->vendor));
+ return EPROTO;
+ }
+ type = ntohs(nve->type);
+ code = ntohs(nve->code);
+ } else {
+ vendor = OFPUTIL_VENDOR_OPENFLOW;
+ }
+
+ if (type >= 1024) {
+ VLOG_WARN_RL(&rl, "error contains type %"PRIu16" greater than "
+ "supported maximum value 1023", type);
+ return EPROTO;
+ }
+
+ if (payload_ofs) {
+ *payload_ofs = (uint8_t *) b.data - (uint8_t *) oh;
+ }
+ return ofp_mkerr_vendor(vendor, type, code);
+}
+
+void
+ofputil_format_error(struct ds *s, int error)
+{
+ if (is_errno(error)) {
+ ds_put_cstr(s, strerror(error));
+ } else {
+ uint16_t type = get_ofp_err_type(error);
+ uint16_t code = get_ofp_err_code(error);
+ const char *type_s = ofp_error_type_to_string(type);
+ const char *code_s = ofp_error_code_to_string(type, code);
+
+ ds_put_format(s, "type ");
+ if (type_s) {
+ ds_put_cstr(s, type_s);
+ } else {
+ ds_put_format(s, "%"PRIu16, type);
+ }
+
+ ds_put_cstr(s, ", code ");
+ if (code_s) {
+ ds_put_cstr(s, code_s);
+ } else {
+ ds_put_format(s, "%"PRIu16, code);
+ }
+ }
+}
+
+char *
+ofputil_error_to_string(int error)
+{
+ struct ds s = DS_EMPTY_INITIALIZER;
+ ofputil_format_error(&s, error);
+ return ds_steal_cstr(&s);
+}
+
/* Attempts to pull 'actions_len' bytes from the front of 'b'. Returns 0 if
* successful, otherwise an OpenFlow error.
*
union ofp_action **actionsp, size_t *n_actionsp)
{
if (actions_len % OFP_ACTION_ALIGN != 0) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
- "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
+ "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN);
goto error;
}
*actionsp = ofpbuf_try_pull(b, actions_len);
if (*actionsp == NULL) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
- "exceeds remaining message length (%zu)",
- actions_len, b->size);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
+ "exceeds remaining message length (%zu)",
+ actions_len, b->size);
goto error;
}
*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;
+}