--- /dev/null
+/**
+ * Copyright 2013, Big Switch Networks, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ **/
+
+package org.openflow.protocol;
+
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.Iterator;
+import java.util.List;
+
+
+/**
+ * a more user friendly representation of the wildcards bits in an OpenFlow
+ * match. The Wildcards object is
+ * <ul>
+ * <li>immutable (i.e., threadsafe)</li>
+ * <li>instance managed (don't instantiate it yourself), instead call "of"</li>
+ * <ul>
+ * <p>
+ * You can construct a Wildcard object from either its integer representation
+ * </p>
+ * <code>
+ * Wildcard.of(0x3820e0);
+ * </code>
+ * <p>
+ * Or start with either an empty or full wildcard, and select/unselect foo.
+ * </p>
+ * <code>
+ * Wildcard w = Wildcards.NONE
+ * .set(Flag.DL_SRC, Flag. DL_DST, Flag.DL_VLAN_PCP)
+ * .setNwDstMask(8)
+ * .setNwSrcMask(8);
+ * </code>
+ * <p>
+ * <b>Remember:</b> Wildcards objects are immutable. set... operations have
+ * <b>NO EFFECT</b> on the current wildcard object. You HAVE to use the returned
+ * changed object.
+ * </p>
+ *
+ * @author Andreas Wundsam <andreas.wundsam@bigswitch.com>
+ */
+public class Wildcards {
+
+ public final static Wildcards FULL = new Wildcards(OFMatch.OFPFW_ALL_SANITIZED);
+ private static final int FULL_INT = FULL.getInt();
+
+ public final static Wildcards EXACT = new Wildcards(0);
+
+ // floodlight common case: matches on inport + l2
+ public final static int INT_INPORT_L2_MATCH = 0x3820e0;
+ public final static Wildcards INPORT_L2_MATCH = new Wildcards(
+ INT_INPORT_L2_MATCH);
+
+ /**
+ * enum type for the binary flags that can be set in the wildcards field of
+ * an OFMatch. Replaces the unwieldy c-ish int constants in OFMatch.
+ */
+ public static enum Flag {
+ IN_PORT(OFMatch.OFPFW_IN_PORT), /* Switch input port. */
+ DL_VLAN(OFMatch.OFPFW_DL_VLAN), /* VLAN id. */
+ DL_SRC(OFMatch.OFPFW_DL_SRC), /* Ethernet source address. */
+ DL_DST(OFMatch.OFPFW_DL_DST), /* Ethernet destination addr */
+ DL_TYPE(OFMatch.OFPFW_DL_TYPE), /* Ethernet frame type. */
+ NW_PROTO(OFMatch.OFPFW_NW_PROTO), /* IP protocol. */
+ TP_SRC(OFMatch.OFPFW_TP_SRC), /* TCP/UDP source port. */
+ TP_DST(OFMatch.OFPFW_TP_DST), /* TCP/UDP destination port. */
+ DL_VLAN_PCP(OFMatch.OFPFW_DL_VLAN_PCP), /* VLAN priority. */
+ NW_SRC(-1) { /*
+ * virtual NW_SRC flag => translates to the strange 6 bits
+ * in the header
+ */
+ @Override
+ boolean isBolean() {
+ return false;
+ }
+
+ @Override
+ int getInt(int flags) {
+ return ((flags & OFMatch.OFPFW_NW_SRC_MASK) >> OFMatch.OFPFW_NW_SRC_SHIFT);
+ }
+
+ @Override
+ int setInt(int flags, int srcMask) {
+ return (flags & ~OFMatch.OFPFW_NW_SRC_MASK) | (srcMask << OFMatch.OFPFW_NW_SRC_SHIFT);
+ }
+
+ @Override
+ int wildcard(int flags) {
+ return flags & ~OFMatch.OFPFW_NW_SRC_MASK;
+ }
+
+ @Override
+ int matchOn(int flags) {
+ return flags | OFMatch.OFPFW_NW_SRC_ALL;
+ }
+
+ @Override
+ boolean isPartiallyOn(int flags) {
+ int intValue = getInt(flags);
+ return intValue > 0 && intValue < 32;
+ }
+
+ @Override
+ boolean isFullyOn(int flags) {
+ return getInt(flags) >= 32;
+ }
+
+ },
+ NW_DST(-1) { /*
+ * virtual NW_SRC flag => translates to the strange 6 bits
+ * in the header
+ */
+ @Override
+ boolean isBolean() {
+ return false;
+ }
+
+ @Override
+ int getInt(int flags) {
+ return ((flags & OFMatch.OFPFW_NW_DST_MASK) >> OFMatch.OFPFW_NW_DST_SHIFT);
+ }
+
+ @Override
+ int setInt(int flags, int srcMask) {
+ return (flags & ~OFMatch.OFPFW_NW_DST_MASK) | (srcMask << OFMatch.OFPFW_NW_DST_SHIFT);
+ }
+
+ @Override
+ int wildcard(int flags) {
+ return flags & ~OFMatch.OFPFW_NW_DST_MASK;
+ }
+
+ @Override
+ int matchOn(int flags) {
+ return flags | OFMatch.OFPFW_NW_DST_ALL;
+ }
+
+ @Override
+ boolean isFullyOn(int flags) {
+ return getInt(flags) >= 32;
+ }
+ },
+ NW_TOS(OFMatch.OFPFW_NW_TOS); /* IP ToS (DSCP field, 6 bits). */
+
+ final int bitPosition;
+
+ Flag(int bitPosition) {
+ this.bitPosition = bitPosition;
+ }
+
+ /**
+ * @return a modified OF-1.0 flags field with this flag cleared (match
+ * on this field)
+ */
+ int matchOn(int flags) {
+ return flags & ~this.bitPosition;
+ }
+
+ /**
+ * @return a modified OF-1.0 flags field with this flag set (wildcard
+ * this field)
+ */
+ int wildcard(int flags) {
+ return flags | this.bitPosition;
+ }
+
+ /**
+ * @return true iff this is a true boolean flag that can either be off
+ * or on.True in OF-1.0 for all fields except NW_SRC and NW_DST
+ */
+ boolean isBolean() {
+ return false;
+ }
+
+ /**
+ * @return true iff this wildcard field is currently 'partially on'.
+ * Always false for true Boolean Flags. Can be true in OF-1.0
+ * for NW_SRC, NW_DST.
+ */
+ boolean isPartiallyOn(int flags) {
+ return false;
+ }
+
+ /**
+ * @return true iff this wildcard field currently fully on (fully
+ * wildcarded). Equivalent to the boolean flag being set in the
+ * bitmask for bit flags, and to the wildcarded bit length set
+ * to >=32 for NW_SRC and NW_DST
+ * @param flags
+ * @return
+ */
+ boolean isFullyOn(int flags) {
+ return (flags & this.bitPosition) != 0;
+ }
+
+ /**
+ * set the integer representation of this flag. only for NW_SRC and
+ * NW_DST
+ */
+ int setInt(int flags, int srcMask) {
+ throw new UnsupportedOperationException();
+ }
+
+ /**
+ * set the integer representation of this flag. only for NW_SRC and
+ * NW_DST
+ */
+ int getInt(int flags) {
+ throw new UnsupportedOperationException();
+ }
+
+
+ }
+
+ private final int flags;
+
+ /** private constructor. use Wildcard.of() instead */
+ private Wildcards(int flags) {
+ this.flags = flags;
+ }
+
+ /**
+ * return a wildcard object matching the given int flags. May reuse / cache
+ * frequently used wildcard instances. Don't rely on it though (use equals
+ * not ==).
+ *
+ * @param flags
+ * @return
+ */
+ public static Wildcards of(int paramFlags) {
+ int flags = sanitizeInt(paramFlags);
+ switch(flags) {
+ case 0x0000:
+ return EXACT;
+ case OFMatch.OFPFW_ALL_SANITIZED:
+ return FULL;
+ case INT_INPORT_L2_MATCH:
+ return INPORT_L2_MATCH;
+ default:
+ return new Wildcards(flags);
+ }
+ }
+
+ /** convience method return a wildcard for exactly one set flag */
+ public static Wildcards of(Wildcards.Flag setFlag) {
+ return Wildcards.of(setFlag.wildcard(0));
+ }
+
+ /** convience method return a wildcard for exactly two set flags */
+ public static Wildcards of(Wildcards.Flag setFlag, Wildcards.Flag setFlag2) {
+ return Wildcards.of(setFlag.wildcard(setFlag2.wildcard(0)));
+ }
+
+ /** convience method return a wildcard for an arbitrary number of set flags */
+ public static Wildcards of(Wildcards.Flag... setFlags) {
+ int flags = 0;
+ for (Wildcards.Flag flag : setFlags)
+ flags = flag.wildcard(0);
+ return Wildcards.of(flags);
+ }
+
+ /** convience method return a wildcards for ofmatches that match on one flag */
+ public static Wildcards ofMatches(Wildcards.Flag setFlag) {
+ return Wildcards.of(setFlag.matchOn(FULL_INT));
+ }
+
+ /**
+ * convience method return a wildcard for for an ofmatch that match on two
+ * flags
+ */
+ public static Wildcards ofMatches(Wildcards.Flag setFlag, Wildcards.Flag setFlag2) {
+ return Wildcards.of(setFlag.matchOn(setFlag2.matchOn(FULL_INT)));
+ }
+
+ /**
+ * convience method return a wildcard for an ofmatch that amtch on an
+ * arbitrary number of set flags
+ */
+ public static Wildcards ofMatches(Wildcards.Flag... setFlags) {
+ int flags = FULL_INT;
+ for (Wildcards.Flag flag : setFlags)
+ flags = flag.matchOn(flags);
+ return Wildcards.of(flags);
+ }
+
+ /**
+ * return a Wildcards object that has the given flags set
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards wildcard(Wildcards.Flag flag) {
+ int flags = flag.wildcard(this.flags);
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcards object that has the given flags set
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards wildcard(Wildcards.Flag flag, Wildcards.Flag flag2) {
+ int flags = flag.wildcard(flag2.wildcard(this.flags));
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcards object that has the given flags wildcarded
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards wildcard(Wildcards.Flag... setFlags) {
+ int flags = this.flags;
+ for (Wildcards.Flag flag : setFlags)
+ flags = flag.wildcard(flags);
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcards object that matches on exactly the given flag
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards matchOn(Wildcards.Flag flag) {
+ int flags = flag.matchOn(this.flags);
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcards object that matches on exactly the given flags
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards matchOn(Wildcards.Flag flag, Wildcards.Flag flag2) {
+ int flags = flag.matchOn(flag2.matchOn(this.flags));
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcards object that matches on exactly the given flags
+ * <p>
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ */
+ public Wildcards matchOn(Wildcards.Flag... setFlags) {
+ int flags = this.flags;
+ for (Wildcards.Flag flag : setFlags)
+ flags = flag.matchOn(flags);
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return the nw src mask in normal CIDR style, e.g., 8 means x.x.x.x/8
+ * means 8 bits wildcarded
+ */
+ public int getNwSrcMask() {
+ return Math.max(0, 32 - Flag.NW_SRC.getInt(flags));
+ }
+
+ /**
+ * return the nw dst mask in normal CIDR style, e.g., 8 means x.x.x.x/8
+ * means 8 bits wildcarded
+ */
+ public int getNwDstMask() {
+ return Math.max(0, 32 - Flag.NW_DST.getInt(flags));
+ }
+
+ /**
+ * return a Wildcard object that has the given nwSrcCidrMask set.
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ *
+ * @param srcCidrMask
+ * source mask to set in <b>normal CIDR notation</b>, i.e., 8
+ * means x.x.x.x/8
+ * @return a modified object
+ */
+ public Wildcards withNwSrcMask(int srcCidrMask) {
+ int flags = Flag.NW_SRC.setInt(this.flags, Math.max(0, 32 - srcCidrMask));
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcard object that has the given nwDstCidrMask set.
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ *
+ * @param dstCidrMask
+ * dest mask to set in <b>normal CIDR notation</b>, i.e., 8 means
+ * x.x.x.x/8
+ * @return a modified object
+ */
+ public Wildcards withNwDstMask(int dstCidrMask) {
+ int flags = Flag.NW_DST.setInt(this.flags, Math.max(0, 32 - dstCidrMask));
+ if (flags == this.flags)
+ return this;
+ else
+ return new Wildcards(flags);
+ }
+
+ /**
+ * return a Wildcard object that is inverted to this wildcard object.
+ * <b>NOTE:</b> NOT a mutator function. 'this' wildcard object stays
+ * unmodified. </b>
+ * @return a modified object
+ */
+ public Wildcards inverted() {
+ return Wildcards.of(flags ^ OFMatch.OFPFW_ALL_SANITIZED);
+ }
+
+ public boolean isWildcarded(Flag flag) {
+ return flag.isFullyOn(flags);
+ }
+
+ /**
+ * return all wildcard flags that are fully wildcarded as an EnumSet. Do not
+ * modify. Note: some flags (like NW_SRC and NW_DST) that are partially
+ * wildcarded are not returned in this set.
+ *
+ * @return the EnumSet of wildcards
+ */
+ public EnumSet<Wildcards.Flag> getWildcardedFlags() {
+ EnumSet<Wildcards.Flag> res = EnumSet.noneOf(Wildcards.Flag.class);
+ for (Wildcards.Flag flag : Flag.values()) {
+ if (flag.isFullyOn(flags)) {
+ res.add(flag);
+ }
+ }
+ return res;
+ }
+
+ /** return the OpenFlow 'wire' integer representation of these wildcards */
+ public int getInt() {
+ return flags;
+ }
+
+ /**
+ * return the OpenFlow 'wire' integer representation of these wildcards.
+ * Sanitize nw_src and nw_dst to be max. 32 (values > 32 are technically
+ * possible, but don't make semantic sense)
+ */
+ public static int sanitizeInt(int flags) {
+ if (((flags & OFMatch.OFPFW_NW_SRC_MASK) >> OFMatch.OFPFW_NW_SRC_SHIFT) > 32) {
+ flags = (flags & ~OFMatch.OFPFW_NW_SRC_MASK) | OFMatch.OFPFW_NW_SRC_ALL;
+ }
+ if (((flags & OFMatch.OFPFW_NW_DST_MASK) >> OFMatch.OFPFW_NW_DST_SHIFT) > 32) {
+ flags = (flags & ~OFMatch.OFPFW_NW_DST_MASK) | OFMatch.OFPFW_NW_DST_ALL;
+ }
+ return flags;
+ }
+
+ /**
+ * is this a wildcard set that has all flags set + and full (/0) nw_src and
+ * nw_dst wildcarding ?
+ */
+ public boolean isFull() {
+ return flags == OFMatch.OFPFW_ALL || flags == OFMatch.OFPFW_ALL_SANITIZED;
+ }
+
+ /** is this a wildcard of an exact match */
+ public boolean isExact() {
+ return flags == 0;
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + flags;
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj)
+ return true;
+ if (obj == null)
+ return false;
+ if (getClass() != obj.getClass())
+ return false;
+ Wildcards other = (Wildcards) obj;
+ if (flags != other.flags)
+ return false;
+ return true;
+ }
+
+
+
+}
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Code Review / controller.git / blobdiff