|
| 1 | +package openflow13 |
| 2 | + |
| 3 | +// This file has all meter related defs |
| 4 | + |
| 5 | +import ( |
| 6 | + "encoding/binary" |
| 7 | + |
| 8 | + log "github.com/sirupsen/logrus" |
| 9 | + |
| 10 | + "github.com/contiv/libOpenflow/common" |
| 11 | + "github.com/contiv/libOpenflow/util" |
| 12 | +) |
| 13 | + |
| 14 | +const ( |
| 15 | + OFPMBT13_DROP = 1 /* Drop packet. */ |
| 16 | + OFPMBT13_DSCP_REMARK = 2 /* Remark DSCP in the IP header. */ |
| 17 | + OFPMBT13_EXPERIMENTER = 0xFFFF /* Experimenter meter band. */ |
| 18 | + |
| 19 | + OFPMC_ADD = 0 /* New meter. */ |
| 20 | + OFPMC_MODIFY = 1 /* Modify specified meter. */ |
| 21 | + OFPMC_DELETE = 2 /* Delete specified meter. */ |
| 22 | + |
| 23 | + OFPMF13_KBPS = 0b0001 /* Rate value in kb/s (kilo-bit per second). */ |
| 24 | + OFPMF13_PKTPS = 0b0010 /* Rate value in packet/sec. */ |
| 25 | + OFPMF13_BURST = 0b0100 /* Do burst size. */ |
| 26 | + OFPMF13_STATS = 0b1000 /* Collect statistics. */ |
| 27 | + |
| 28 | + METER_BAND_HEADER_LEN = 12 |
| 29 | + METER_BAND_LEN = 16 |
| 30 | +) |
| 31 | + |
| 32 | +type MeterBandHeader struct { |
| 33 | + Type uint16 /* One of OFPMBT13_*. */ |
| 34 | + Length uint16 /* Length in bytes of this band. */ |
| 35 | + Rate uint32 /* Rate for this band. */ |
| 36 | + BurstSize uint32 /* Size of bursts. */ |
| 37 | +} |
| 38 | + |
| 39 | +func NewMeterBandHeader() *MeterBandHeader { |
| 40 | + return &MeterBandHeader{ |
| 41 | + Length: METER_BAND_LEN, |
| 42 | + } |
| 43 | +} |
| 44 | + |
| 45 | +func (m *MeterBandHeader) Len() (n uint16) { |
| 46 | + return METER_BAND_HEADER_LEN |
| 47 | +} |
| 48 | + |
| 49 | +func (m *MeterBandHeader) MarshalBinary() (data []byte, err error) { |
| 50 | + data = make([]byte, m.Len()) |
| 51 | + n := 0 |
| 52 | + binary.BigEndian.PutUint16(data[n:], m.Type) |
| 53 | + n += 2 |
| 54 | + binary.BigEndian.PutUint16(data[n:], m.Length) |
| 55 | + n += 2 |
| 56 | + binary.BigEndian.PutUint32(data[n:], m.Rate) |
| 57 | + n += 4 |
| 58 | + binary.BigEndian.PutUint32(data[n:], m.BurstSize) |
| 59 | + |
| 60 | + return |
| 61 | +} |
| 62 | + |
| 63 | +func (m *MeterBandHeader) UnmarshalBinary(data []byte) error { |
| 64 | + n := 0 |
| 65 | + m.Type = binary.BigEndian.Uint16(data[n:]) |
| 66 | + n += 2 |
| 67 | + m.Length = binary.BigEndian.Uint16(data[n:]) |
| 68 | + n += 2 |
| 69 | + m.Rate = binary.BigEndian.Uint32(data[n:]) |
| 70 | + n += 4 |
| 71 | + m.BurstSize = binary.BigEndian.Uint32(data[n:]) |
| 72 | + |
| 73 | + return nil |
| 74 | +} |
| 75 | + |
| 76 | +type MeterBandDrop struct { |
| 77 | + MeterBandHeader /* Type: OFPMBT13_DROP. */ |
| 78 | + pad [4]uint8 |
| 79 | +} |
| 80 | + |
| 81 | +func (m *MeterBandDrop) Len() (n uint16) { |
| 82 | + return METER_BAND_LEN |
| 83 | +} |
| 84 | + |
| 85 | +func (m *MeterBandDrop) MarshalBinary() (data []byte, err error) { |
| 86 | + data = make([]byte, m.Len()) |
| 87 | + n := 0 |
| 88 | + mbHdrBytes, err := m.MeterBandHeader.MarshalBinary() |
| 89 | + if err != nil { |
| 90 | + return nil, err |
| 91 | + } |
| 92 | + copy(data, mbHdrBytes) |
| 93 | + n += METER_BAND_HEADER_LEN |
| 94 | + return |
| 95 | +} |
| 96 | + |
| 97 | +func (m *MeterBandDrop) UnmarshalBinary(data []byte) error { |
| 98 | + n := 0 |
| 99 | + m.MeterBandHeader.UnmarshalBinary(data[n:]) |
| 100 | + n += int(m.MeterBandHeader.Len()) |
| 101 | + |
| 102 | + return nil |
| 103 | +} |
| 104 | + |
| 105 | +type MeterBandDSCP struct { |
| 106 | + MeterBandHeader /* Type: OFPMBT13_DSCP_REMARK. */ |
| 107 | + PrecLevel uint8 /* Number of drop precedence level to add. */ |
| 108 | + pad [3]uint8 |
| 109 | +} |
| 110 | + |
| 111 | +func (m *MeterBandDSCP) Len() (n uint16) { |
| 112 | + return METER_BAND_LEN |
| 113 | +} |
| 114 | + |
| 115 | +func (m *MeterBandDSCP) MarshalBinary() (data []byte, err error) { |
| 116 | + data = make([]byte, m.Len()) |
| 117 | + n := 0 |
| 118 | + mbHdrBytes, err := m.MeterBandHeader.MarshalBinary() |
| 119 | + if err != nil { |
| 120 | + return nil, err |
| 121 | + } |
| 122 | + copy(data, mbHdrBytes) |
| 123 | + n += METER_BAND_HEADER_LEN |
| 124 | + data[n] = m.PrecLevel |
| 125 | + return |
| 126 | +} |
| 127 | + |
| 128 | +func (m *MeterBandDSCP) UnmarshalBinary(data []byte) error { |
| 129 | + n := 0 |
| 130 | + m.MeterBandHeader.UnmarshalBinary(data[n:]) |
| 131 | + n += int(m.MeterBandHeader.Len()) |
| 132 | + m.PrecLevel = data[n] |
| 133 | + |
| 134 | + return nil |
| 135 | +} |
| 136 | + |
| 137 | +type MeterBandExperimenter struct { |
| 138 | + MeterBandHeader /* Type: OFPMBT13_EXPERIMENTER. */ |
| 139 | + Experimenter uint32 /* Experimenter ID which takes the same form as in struct ofp_experimenter_header. */ |
| 140 | +} |
| 141 | + |
| 142 | +func (m *MeterBandExperimenter) Len() (n uint16) { |
| 143 | + return METER_BAND_LEN |
| 144 | +} |
| 145 | + |
| 146 | +func (m *MeterBandExperimenter) MarshalBinary() (data []byte, err error) { |
| 147 | + data = make([]byte, m.Len()) |
| 148 | + n := 0 |
| 149 | + mbHdrBytes, err := m.MeterBandHeader.MarshalBinary() |
| 150 | + if err != nil { |
| 151 | + return nil, err |
| 152 | + } |
| 153 | + copy(data, mbHdrBytes) |
| 154 | + n += METER_BAND_HEADER_LEN |
| 155 | + binary.BigEndian.PutUint32(data[n:], m.Experimenter) |
| 156 | + return |
| 157 | +} |
| 158 | + |
| 159 | +func (m *MeterBandExperimenter) UnmarshalBinary(data []byte) error { |
| 160 | + n := 0 |
| 161 | + m.MeterBandHeader.UnmarshalBinary(data[n:]) |
| 162 | + n += int(m.MeterBandHeader.Len()) |
| 163 | + m.Experimenter = binary.BigEndian.Uint32(data[n:]) |
| 164 | + |
| 165 | + return nil |
| 166 | +} |
| 167 | + |
| 168 | +// MeterMod message |
| 169 | +type MeterMod struct { |
| 170 | + common.Header |
| 171 | + Command uint16 /* One of OFPMC_*. */ |
| 172 | + Flags uint16 /* Set of OFPMF_*. */ |
| 173 | + MeterId uint32 /* Meter instance. */ |
| 174 | + MeterBands []util.Message /* List of MeterBand*. */ |
| 175 | +} |
| 176 | + |
| 177 | +// Create a new meter mod message |
| 178 | +func NewMeterMod() *MeterMod { |
| 179 | + m := new(MeterMod) |
| 180 | + m.Header = NewOfp13Header() |
| 181 | + m.Header.Type = Type_MeterMod |
| 182 | + m.MeterBands = make([]util.Message, 0) |
| 183 | + return m |
| 184 | +} |
| 185 | + |
| 186 | +// Add a meterBand to meter mod |
| 187 | +func (m *MeterMod) AddMeterBand(mb util.Message) { |
| 188 | + m.MeterBands = append(m.MeterBands, mb) |
| 189 | +} |
| 190 | + |
| 191 | +func (m *MeterMod) Len() (n uint16) { |
| 192 | + n = m.Header.Len() |
| 193 | + n += 8 |
| 194 | + if m.Command == OFPMC_DELETE { |
| 195 | + return |
| 196 | + } |
| 197 | + |
| 198 | + for _, b := range m.MeterBands { |
| 199 | + n += b.Len() |
| 200 | + } |
| 201 | + |
| 202 | + return |
| 203 | +} |
| 204 | + |
| 205 | +func (m *MeterMod) MarshalBinary() (data []byte, err error) { |
| 206 | + m.Header.Length = m.Len() |
| 207 | + data = make([]byte, m.Len()) |
| 208 | + n := 0 |
| 209 | + hdrBytes, err := m.Header.MarshalBinary() |
| 210 | + if err != nil { |
| 211 | + return nil, err |
| 212 | + } |
| 213 | + copy(data, hdrBytes) |
| 214 | + n += int(m.Header.Len()) |
| 215 | + binary.BigEndian.PutUint16(data[n:], m.Command) |
| 216 | + n += 2 |
| 217 | + binary.BigEndian.PutUint16(data[n:], m.Flags) |
| 218 | + n += 2 |
| 219 | + binary.BigEndian.PutUint32(data[n:], m.MeterId) |
| 220 | + n += 4 |
| 221 | + |
| 222 | + for _, mb := range m.MeterBands { |
| 223 | + mbBytes, err := mb.MarshalBinary() |
| 224 | + if err != nil { |
| 225 | + return nil, err |
| 226 | + } |
| 227 | + copy(data[n:], mbBytes) |
| 228 | + n += METER_BAND_LEN |
| 229 | + log.Debugf("Metermod band: %v", mbBytes) |
| 230 | + } |
| 231 | + |
| 232 | + log.Debugf("Metermod(%d): %v", len(data), data) |
| 233 | + |
| 234 | + return |
| 235 | +} |
| 236 | + |
| 237 | +func (m *MeterMod) UnmarshalBinary(data []byte) error { |
| 238 | + n := 0 |
| 239 | + m.Header.UnmarshalBinary(data[n:]) |
| 240 | + n += int(m.Header.Len()) |
| 241 | + |
| 242 | + m.Command = binary.BigEndian.Uint16(data[n:]) |
| 243 | + n += 2 |
| 244 | + m.Flags = binary.BigEndian.Uint16(data[n:]) |
| 245 | + n += 2 |
| 246 | + m.MeterId = binary.BigEndian.Uint32(data[n:]) |
| 247 | + n += 4 |
| 248 | + |
| 249 | + for n < int(m.Header.Length) { |
| 250 | + mbh := new(MeterBandHeader) |
| 251 | + mbh.UnmarshalBinary(data[n:]) |
| 252 | + n += int(mbh.Len()) |
| 253 | + switch mbh.Type { |
| 254 | + case OFPMBT13_DROP: |
| 255 | + mbDrop := new(MeterBandDrop) |
| 256 | + mbDrop.MeterBandHeader = *mbh |
| 257 | + m.MeterBands = append(m.MeterBands, mbDrop) |
| 258 | + case OFPMBT13_DSCP_REMARK: |
| 259 | + mbDscp := new(MeterBandDSCP) |
| 260 | + mbDscp.MeterBandHeader = *mbh |
| 261 | + mbDscp.PrecLevel = data[n] |
| 262 | + m.MeterBands = append(m.MeterBands, mbDscp) |
| 263 | + case OFPMBT13_EXPERIMENTER: |
| 264 | + mbExp := new(MeterBandExperimenter) |
| 265 | + mbExp.MeterBandHeader = *mbh |
| 266 | + mbExp.Experimenter = binary.BigEndian.Uint32(data[n:]) |
| 267 | + m.MeterBands = append(m.MeterBands, mbExp) |
| 268 | + } |
| 269 | + n += 4 |
| 270 | + } |
| 271 | + |
| 272 | + return nil |
| 273 | +} |
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