diff options
Diffstat (limited to 'kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/stun.cpp')
| -rw-r--r-- | kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/stun.cpp | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/stun.cpp b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/stun.cpp new file mode 100644 index 00000000..2d6aa67c --- /dev/null +++ b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/stun.cpp @@ -0,0 +1,577 @@ +/* + * libjingle + * Copyright 2004--2005, Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "talk/base/logging.h" +#include "talk/p2p/base/stun.h" +#include <iostream> +#include <cassert> +#include <cstring> + +#if defined(_MSC_VER) && _MSC_VER < 1300 +namespace std { + using ::memcpy; +} +#endif + +namespace cricket { + +const std::string STUN_ERROR_REASON_BAD_REQUEST = "BAD REQUEST"; +const std::string STUN_ERROR_REASON_UNAUTHORIZED = "UNAUTHORIZED"; +const std::string STUN_ERROR_REASON_UNKNOWN_ATTRIBUTE = "UNKNOWN ATTRIBUTE"; +const std::string STUN_ERROR_REASON_STALE_CREDENTIALS = "STALE CREDENTIALS"; +const std::string STUN_ERROR_REASON_INTEGRITY_CHECK_FAILURE = "INTEGRITY CHECK FAILURE"; +const std::string STUN_ERROR_REASON_MISSING_USERNAME = "MISSING USERNAME"; +const std::string STUN_ERROR_REASON_USE_TLS = "USE TLS"; +const std::string STUN_ERROR_REASON_SERVER_ERROR = "SERVER ERROR"; +const std::string STUN_ERROR_REASON_GLOBAL_FAILURE = "GLOBAL FAILURE"; + +StunMessage::StunMessage() : type_(0), length_(0), + transaction_id_("0000000000000000") { + assert(transaction_id_.size() == 16); + attrs_ = new std::vector<StunAttribute*>(); +} + +StunMessage::~StunMessage() { + for (unsigned i = 0; i < attrs_->size(); i++) + delete (*attrs_)[i]; + delete attrs_; +} + +void StunMessage::SetTransactionID(const std::string& str) { + assert(str.size() == 16); + transaction_id_ = str; +} + +void StunMessage::AddAttribute(StunAttribute* attr) { + attrs_->push_back(attr); + length_ += attr->length() + 4; +} + +const StunAddressAttribute* +StunMessage::GetAddress(StunAttributeType type) const { + switch (type) { + case STUN_ATTR_MAPPED_ADDRESS: + case STUN_ATTR_RESPONSE_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS: + case STUN_ATTR_CHANGED_ADDRESS: + case STUN_ATTR_REFLECTED_FROM: + case STUN_ATTR_ALTERNATE_SERVER: + case STUN_ATTR_DESTINATION_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS2: + return reinterpret_cast<const StunAddressAttribute*>(GetAttribute(type)); + + default: + assert(0); + return 0; + } +} + +const StunUInt32Attribute* +StunMessage::GetUInt32(StunAttributeType type) const { + switch (type) { + case STUN_ATTR_CHANGE_REQUEST: + case STUN_ATTR_LIFETIME: + case STUN_ATTR_BANDWIDTH: + case STUN_ATTR_OPTIONS: + return reinterpret_cast<const StunUInt32Attribute*>(GetAttribute(type)); + + default: + assert(0); + return 0; + } +} + +const StunByteStringAttribute* +StunMessage::GetByteString(StunAttributeType type) const { + switch (type) { + case STUN_ATTR_USERNAME: + case STUN_ATTR_PASSWORD: + case STUN_ATTR_MESSAGE_INTEGRITY: + case STUN_ATTR_DATA: + case STUN_ATTR_MAGIC_COOKIE: + return reinterpret_cast<const StunByteStringAttribute*>(GetAttribute(type)); + + default: + assert(0); + return 0; + } +} + +const StunErrorCodeAttribute* StunMessage::GetErrorCode() const { + return reinterpret_cast<const StunErrorCodeAttribute*>( + GetAttribute(STUN_ATTR_ERROR_CODE)); +} + +const StunUInt16ListAttribute* StunMessage::GetUnknownAttributes() const { + return reinterpret_cast<const StunUInt16ListAttribute*>( + GetAttribute(STUN_ATTR_UNKNOWN_ATTRIBUTES)); +} + +const StunTransportPrefsAttribute* StunMessage::GetTransportPrefs() const { + return reinterpret_cast<const StunTransportPrefsAttribute*>( + GetAttribute(STUN_ATTR_TRANSPORT_PREFERENCES)); +} + +const StunAttribute* StunMessage::GetAttribute(StunAttributeType type) const { + for (unsigned i = 0; i < attrs_->size(); i++) { + if ((*attrs_)[i]->type() == type) + return (*attrs_)[i]; + } + return 0; +} + +bool StunMessage::Read(ByteBuffer* buf) { + if (!buf->ReadUInt16(type_)) + return false; + + if (!buf->ReadUInt16(length_)) + return false; + + std::string transaction_id; + if (!buf->ReadString(transaction_id, 16)) + return false; + assert(transaction_id.size() == 16); + transaction_id_ = transaction_id; + + if (length_ > buf->Length()) + return false; + + attrs_->resize(0); + + size_t rest = buf->Length() - length_; + while (buf->Length() > rest) { + uint16 attr_type, attr_length; + if (!buf->ReadUInt16(attr_type)) + return false; + if (!buf->ReadUInt16(attr_length)) + return false; + + StunAttribute* attr = StunAttribute::Create(attr_type, attr_length); + if (!attr || !attr->Read(buf)) + return false; + + attrs_->push_back(attr); + } + + if (buf->Length() != rest) { + // fixme: shouldn't be doing this + LOG(LERROR) << "wrong message length" + << " (" << (int)rest << " != " << (int)buf->Length() << ")"; + return false; + } + + return true; +} + +void StunMessage::Write(ByteBuffer* buf) const { + buf->WriteUInt16(type_); + buf->WriteUInt16(length_); + buf->WriteString(transaction_id_); + + for (unsigned i = 0; i < attrs_->size(); i++) { + buf->WriteUInt16((*attrs_)[i]->type()); + buf->WriteUInt16((*attrs_)[i]->length()); + (*attrs_)[i]->Write(buf); + } +} + +StunAttribute::StunAttribute(uint16 type, uint16 length) + : type_(type), length_(length) { +} + +StunAttribute* StunAttribute::Create(uint16 type, uint16 length) { + switch (type) { + case STUN_ATTR_MAPPED_ADDRESS: + case STUN_ATTR_RESPONSE_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS: + case STUN_ATTR_CHANGED_ADDRESS: + case STUN_ATTR_REFLECTED_FROM: + case STUN_ATTR_ALTERNATE_SERVER: + case STUN_ATTR_DESTINATION_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS2: + if (length != StunAddressAttribute::SIZE) + return 0; + return new StunAddressAttribute(type); + + case STUN_ATTR_CHANGE_REQUEST: + case STUN_ATTR_LIFETIME: + case STUN_ATTR_BANDWIDTH: + case STUN_ATTR_OPTIONS: + if (length != StunUInt32Attribute::SIZE) + return 0; + return new StunUInt32Attribute(type); + + case STUN_ATTR_USERNAME: + case STUN_ATTR_PASSWORD: + case STUN_ATTR_MAGIC_COOKIE: + return (length % 4 == 0) ? new StunByteStringAttribute(type, length) : 0; + + case STUN_ATTR_MESSAGE_INTEGRITY: + return (length == 20) ? new StunByteStringAttribute(type, length) : 0; + + case STUN_ATTR_DATA: + return new StunByteStringAttribute(type, length); + + case STUN_ATTR_ERROR_CODE: + if (length < StunErrorCodeAttribute::MIN_SIZE) + return 0; + return new StunErrorCodeAttribute(type, length); + + case STUN_ATTR_UNKNOWN_ATTRIBUTES: + return (length % 2 == 0) ? new StunUInt16ListAttribute(type, length) : 0; + + case STUN_ATTR_TRANSPORT_PREFERENCES: + if ((length != StunTransportPrefsAttribute::SIZE1) && + (length != StunTransportPrefsAttribute::SIZE2)) + return 0; + return new StunTransportPrefsAttribute(type, length); + + default: + return 0; + } +} + +StunAddressAttribute* StunAttribute::CreateAddress(uint16 type) { + switch (type) { + case STUN_ATTR_MAPPED_ADDRESS: + case STUN_ATTR_RESPONSE_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS: + case STUN_ATTR_CHANGED_ADDRESS: + case STUN_ATTR_REFLECTED_FROM: + case STUN_ATTR_ALTERNATE_SERVER: + case STUN_ATTR_DESTINATION_ADDRESS: + case STUN_ATTR_SOURCE_ADDRESS2: + return new StunAddressAttribute(type); + + default: + assert(false); + return 0; + } +} + +StunUInt32Attribute* StunAttribute::CreateUInt32(uint16 type) { + switch (type) { + case STUN_ATTR_CHANGE_REQUEST: + case STUN_ATTR_LIFETIME: + case STUN_ATTR_BANDWIDTH: + case STUN_ATTR_OPTIONS: + return new StunUInt32Attribute(type); + + default: + assert(false); + return 0; + } +} + +StunByteStringAttribute* StunAttribute::CreateByteString(uint16 type) { + switch (type) { + case STUN_ATTR_USERNAME: + case STUN_ATTR_PASSWORD: + case STUN_ATTR_MESSAGE_INTEGRITY: + case STUN_ATTR_DATA: + case STUN_ATTR_MAGIC_COOKIE: + return new StunByteStringAttribute(type, 0); + + default: + assert(false); + return 0; + } +} + +StunErrorCodeAttribute* StunAttribute::CreateErrorCode() { + return new StunErrorCodeAttribute( + STUN_ATTR_ERROR_CODE, StunErrorCodeAttribute::MIN_SIZE); +} + +StunUInt16ListAttribute* StunAttribute::CreateUnknownAttributes() { + return new StunUInt16ListAttribute(STUN_ATTR_UNKNOWN_ATTRIBUTES, 0); +} + +StunTransportPrefsAttribute* StunAttribute::CreateTransportPrefs() { + return new StunTransportPrefsAttribute( + STUN_ATTR_TRANSPORT_PREFERENCES, StunTransportPrefsAttribute::SIZE1); +} + +StunAddressAttribute::StunAddressAttribute(uint16 type) + : StunAttribute(type, SIZE), family_(0), port_(0), ip_(0) { +} + +bool StunAddressAttribute::Read(ByteBuffer* buf) { + uint8 dummy; + if (!buf->ReadUInt8(dummy)) + return false; + if (!buf->ReadUInt8(family_)) + return false; + if (!buf->ReadUInt16(port_)) + return false; + if (!buf->ReadUInt32(ip_)) + return false; + return true; +} + +void StunAddressAttribute::Write(ByteBuffer* buf) const { + buf->WriteUInt8(0); + buf->WriteUInt8(family_); + buf->WriteUInt16(port_); + buf->WriteUInt32(ip_); +} + +StunUInt32Attribute::StunUInt32Attribute(uint16 type) + : StunAttribute(type, SIZE), bits_(0) { +} + +bool StunUInt32Attribute::GetBit(int index) const { + assert((0 <= index) && (index < 32)); + return static_cast<bool>((bits_ >> index) & 0x1); +} + +void StunUInt32Attribute::SetBit(int index, bool value) { + assert((0 <= index) && (index < 32)); + bits_ &= ~(1 << index); + bits_ |= value ? (1 << index) : 0; +} + +bool StunUInt32Attribute::Read(ByteBuffer* buf) { + if (!buf->ReadUInt32(bits_)) + return false; + return true; +} + +void StunUInt32Attribute::Write(ByteBuffer* buf) const { + buf->WriteUInt32(bits_); +} + +StunByteStringAttribute::StunByteStringAttribute(uint16 type, uint16 length) + : StunAttribute(type, length), bytes_(0) { +} + +StunByteStringAttribute::~StunByteStringAttribute() { + delete [] bytes_; +} + +void StunByteStringAttribute::SetBytes(char* bytes, uint16 length) { + delete [] bytes_; + bytes_ = bytes; + SetLength(length); +} + +void StunByteStringAttribute::CopyBytes(const char* bytes) { + CopyBytes(bytes, (uint16)strlen(bytes)); +} + +void StunByteStringAttribute::CopyBytes(const void* bytes, uint16 length) { + char* new_bytes = new char[length]; + std::memcpy(new_bytes, bytes, length); + SetBytes(new_bytes, length); +} + +uint8 StunByteStringAttribute::GetByte(int index) const { + assert(bytes_); + assert((0 <= index) && (index < length())); + return static_cast<uint8>(bytes_[index]); +} + +void StunByteStringAttribute::SetByte(int index, uint8 value) { + assert(bytes_); + assert((0 <= index) && (index < length())); + bytes_[index] = value; +} + +bool StunByteStringAttribute::Read(ByteBuffer* buf) { + bytes_ = new char[length()]; + if (!buf->ReadBytes(bytes_, length())) + return false; + return true; +} + +void StunByteStringAttribute::Write(ByteBuffer* buf) const { + buf->WriteBytes(bytes_, length()); +} + +StunErrorCodeAttribute::StunErrorCodeAttribute(uint16 type, uint16 length) + : StunAttribute(type, length), class_(0), number_(0) { +} + +StunErrorCodeAttribute::~StunErrorCodeAttribute() { +} + +void StunErrorCodeAttribute::SetErrorCode(uint32 code) { + class_ = (uint8)((code >> 8) & 0x7); + number_ = (uint8)(code & 0xff); +} + +void StunErrorCodeAttribute::SetReason(const std::string& reason) { + SetLength(MIN_SIZE + (uint16)reason.size()); + reason_ = reason; +} + +bool StunErrorCodeAttribute::Read(ByteBuffer* buf) { + uint32 val; + if (!buf->ReadUInt32(val)) + return false; + + if ((val >> 11) != 0) + LOG(LERROR) << "error-code bits not zero"; + + SetErrorCode(val); + + if (!buf->ReadString(reason_, length() - 4)) + return false; + + return true; +} + +void StunErrorCodeAttribute::Write(ByteBuffer* buf) const { + buf->WriteUInt32(error_code()); + buf->WriteString(reason_); +} + +StunUInt16ListAttribute::StunUInt16ListAttribute(uint16 type, uint16 length) + : StunAttribute(type, length) { + attr_types_ = new std::vector<uint16>(); +} + +StunUInt16ListAttribute::~StunUInt16ListAttribute() { + delete attr_types_; +} + +size_t StunUInt16ListAttribute::Size() const { + return attr_types_->size(); +} + +uint16 StunUInt16ListAttribute::GetType(int index) const { + return (*attr_types_)[index]; +} + +void StunUInt16ListAttribute::SetType(int index, uint16 value) { + (*attr_types_)[index] = value; +} + +void StunUInt16ListAttribute::AddType(uint16 value) { + attr_types_->push_back(value); + SetLength((uint16)attr_types_->size() * 2); +} + +bool StunUInt16ListAttribute::Read(ByteBuffer* buf) { + for (int i = 0; i < length() / 2; i++) { + uint16 attr; + if (!buf->ReadUInt16(attr)) + return false; + attr_types_->push_back(attr); + } + return true; +} + +void StunUInt16ListAttribute::Write(ByteBuffer* buf) const { + for (unsigned i = 0; i < attr_types_->size(); i++) + buf->WriteUInt16((*attr_types_)[i]); +} + +StunTransportPrefsAttribute::StunTransportPrefsAttribute( + uint16 type, uint16 length) + : StunAttribute(type, length), preallocate_(false), prefs_(0), addr_(0) { +} + +StunTransportPrefsAttribute::~StunTransportPrefsAttribute() { + delete addr_; +} + +void StunTransportPrefsAttribute::SetPreallocateAddress( + StunAddressAttribute* addr) { + if (!addr) { + preallocate_ = false; + addr_ = 0; + SetLength(SIZE1); + } else { + preallocate_ = true; + addr_ = addr; + SetLength(SIZE2); + } +} + +bool StunTransportPrefsAttribute::Read(ByteBuffer* buf) { + uint32 val; + if (!buf->ReadUInt32(val)) + return false; + + if ((val >> 3) != 0) + LOG(LERROR) << "transport-preferences bits not zero"; + + preallocate_ = static_cast<bool>((val >> 2) & 0x1); + prefs_ = (uint8)(val & 0x3); + + if (preallocate_ && (prefs_ == 3)) + LOG(LERROR) << "transport-preferences imcompatible P and Typ"; + + if (!preallocate_) { + if (length() != StunUInt32Attribute::SIZE) + return false; + } else { + if (length() != StunUInt32Attribute::SIZE + StunAddressAttribute::SIZE) + return false; + + addr_ = new StunAddressAttribute(STUN_ATTR_SOURCE_ADDRESS); + addr_->Read(buf); + } + + return true; +} + +void StunTransportPrefsAttribute::Write(ByteBuffer* buf) const { + buf->WriteUInt32((preallocate_ ? 4 : 0) | prefs_); + + if (preallocate_) + addr_->Write(buf); +} + +StunMessageType GetStunResponseType(StunMessageType request_type) { + switch (request_type) { + case STUN_SHARED_SECRET_REQUEST: + return STUN_SHARED_SECRET_RESPONSE; + case STUN_ALLOCATE_REQUEST: + return STUN_ALLOCATE_RESPONSE; + case STUN_SEND_REQUEST: + return STUN_SEND_RESPONSE; + default: + return STUN_BINDING_RESPONSE; + } +} + +StunMessageType GetStunErrorResponseType(StunMessageType request_type) { + switch (request_type) { + case STUN_SHARED_SECRET_REQUEST: + return STUN_SHARED_SECRET_ERROR_RESPONSE; + case STUN_ALLOCATE_REQUEST: + return STUN_ALLOCATE_ERROR_RESPONSE; + case STUN_SEND_REQUEST: + return STUN_SEND_ERROR_RESPONSE; + default: + return STUN_BINDING_ERROR_RESPONSE; + } +} + +} // namespace cricket |