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// Copyright 2016 Cong Ding
//
// 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 stun
// Default server address and client name.
const (
DefaultServerAddr = "stun.ekiga.net:3478"
DefaultSoftwareName = "StunClient"
)
const (
magicCookie = 0x2112A442
fingerprint = 0x5354554e
)
// NATType is the type of NAT described by int.
type NATType int
// NAT types.
const (
NATError NATType = iota
NATUnknown
NATNone
NATBlocked
NATFull
NATSymmetric
NATRestricted
NATPortRestricted
SymmetricUDPFirewall
// Deprecated spellings of these constants
NATSymetric = NATSymmetric
NATSymetricUDPFirewall = SymmetricUDPFirewall
NATSymmetricUDPFirewall = SymmetricUDPFirewall
)
var natStr map[NATType]string
func init() {
natStr = map[NATType]string{
NATError: "Test failed",
NATUnknown: "Unexpected response from the STUN server",
NATBlocked: "UDP is blocked",
NATFull: "Full cone NAT",
NATSymmetric: "Symmetric NAT",
NATRestricted: "Restricted NAT",
NATPortRestricted: "Port restricted NAT",
NATNone: "Not behind a NAT",
SymmetricUDPFirewall: "Symmetric UDP firewall",
}
}
func (nat NATType) String() string {
if s, ok := natStr[nat]; ok {
return s
}
return "Unknown"
}
const (
errorTryAlternate = 300
errorBadRequest = 400
errorUnauthorized = 401
errorUnassigned402 = 402
errorForbidden = 403
errorUnknownAttribute = 420
errorAllocationMismatch = 437
errorStaleNonce = 438
errorUnassigned439 = 439
errorAddressFamilyNotSupported = 440
errorWrongCredentials = 441
errorUnsupportedTransportProtocol = 442
errorPeerAddressFamilyMismatch = 443
errorConnectionAlreadyExists = 446
errorConnectionTimeoutOrFailure = 447
errorAllocationQuotaReached = 486
errorRoleConflict = 487
errorServerError = 500
errorInsufficientCapacity = 508
)
const (
attributeFamilyIPv4 = 0x01
attributeFamilyIPV6 = 0x02
)
const (
attributeMappedAddress = 0x0001
attributeResponseAddress = 0x0002
attributeChangeRequest = 0x0003
attributeSourceAddress = 0x0004
attributeChangedAddress = 0x0005
attributeUsername = 0x0006
attributePassword = 0x0007
attributeMessageIntegrity = 0x0008
attributeErrorCode = 0x0009
attributeUnknownAttributes = 0x000a
attributeReflectedFrom = 0x000b
attributeChannelNumber = 0x000c
attributeLifetime = 0x000d
attributeBandwidth = 0x0010
attributeXorPeerAddress = 0x0012
attributeData = 0x0013
attributeRealm = 0x0014
attributeNonce = 0x0015
attributeXorRelayedAddress = 0x0016
attributeRequestedAddressFamily = 0x0017
attributeEvenPort = 0x0018
attributeRequestedTransport = 0x0019
attributeDontFragment = 0x001a
attributeXorMappedAddress = 0x0020
attributeTimerVal = 0x0021
attributeReservationToken = 0x0022
attributePriority = 0x0024
attributeUseCandidate = 0x0025
attributePadding = 0x0026
attributeResponsePort = 0x0027
attributeConnectionID = 0x002a
attributeXorMappedAddressExp = 0x8020
attributeSoftware = 0x8022
attributeAlternateServer = 0x8023
attributeCacheTimeout = 0x8027
attributeFingerprint = 0x8028
attributeIceControlled = 0x8029
attributeIceControlling = 0x802a
attributeResponseOrigin = 0x802b
attributeOtherAddress = 0x802c
attributeEcnCheckStun = 0x802d
attributeCiscoFlowdata = 0xc000
)
const (
typeBindingRequest = 0x0001
typeBindingResponse = 0x0101
typeBindingErrorResponse = 0x0111
typeSharedSecretRequest = 0x0002
typeSharedSecretResponse = 0x0102
typeSharedErrorResponse = 0x0112
typeAllocate = 0x0003
typeAllocateResponse = 0x0103
typeAllocateErrorResponse = 0x0113
typeRefresh = 0x0004
typeRefreshResponse = 0x0104
typeRefreshErrorResponse = 0x0114
typeSend = 0x0006
typeSendResponse = 0x0106
typeSendErrorResponse = 0x0116
typeData = 0x0007
typeDataResponse = 0x0107
typeDataErrorResponse = 0x0117
typeCreatePermisiion = 0x0008
typeCreatePermisiionResponse = 0x0108
typeCreatePermisiionErrorResponse = 0x0118
typeChannelBinding = 0x0009
typeChannelBindingResponse = 0x0109
typeChannelBindingErrorResponse = 0x0119
typeConnect = 0x000a
typeConnectResponse = 0x010a
typeConnectErrorResponse = 0x011a
typeConnectionBind = 0x000b
typeConnectionBindResponse = 0x010b
typeConnectionBindErrorResponse = 0x011b
typeConnectionAttempt = 0x000c
typeConnectionAttemptResponse = 0x010c
typeConnectionAttemptErrorResponse = 0x011c
)
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