--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/telephonyprotocols/rawipnif/version1/src/IPv4ProtocolIf.cpp Tue Feb 02 01:41:59 2010 +0200
@@ -0,0 +1,776 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// This file implements the CIPv4ProtocolIf class, which handles the transmission
+// of IPv4 data to and from the TCP/IP stack.
+//
+//
+
+/**
+ @file
+*/
+
+#include <etelpckt.h>
+#include <in_iface.h>
+#include "RawIPNifMain.h"
+#include "IPv4ProtocolIf.h"
+#ifdef WCDMA_STUB
+#include <UMTSNifControlIf.h>
+#endif
+#define LOG_IP_ADDRESS(desc,addr) _LOG_L2C5(_L8(" " desc " = %d.%d.%d.%d from context"), \
+ addr >> 24, (addr >> 16) & 0xFF, (addr >> 8) & 0xFF, addr & 0xFF);
+
+CIPv4ProtocolIf::CIPv4ProtocolIf(CRawIPNifMain& aNifMain, CBttLogger* aTheLogger)
+/**
+ * Constructor
+ */
+ : CProtocolIfBase(aNifMain,aTheLogger),
+ iTheLogger(aTheLogger),
+ iSpeedMetric(KDefaultSpeedMetric)
+ {
+ }
+
+CIPv4ProtocolIf::~CIPv4ProtocolIf()
+/**
+ * Destructor
+ */
+ {
+ }
+
+void CIPv4ProtocolIf::BindL(TAny* aId)
+/**
+ * Binds protocol to the Nif
+ *
+ * @param aId A point the the protocol(TCP/IP)
+ */
+ {
+ _LOG_L1C2(_L8("CIPv4ProtocolIf::BindL [aId=%X]"), aId);
+
+ CProtocolIfBase::BindL(aId); // Call the superclass's method.
+ iNotify = iNifMain.Notify();
+ }
+
+TInt CIPv4ProtocolIf::Control(TUint aLevel, TUint aName, TDes8& aOption,
+ TAny* /*aSource*/)
+/**
+ * The main function called by the TCP/IP protocol to control the interface.
+ * Can perform a variety of general IP tasks (such as getting IP config)
+ * and "3G" specific tasks (such as deleting the context).
+ *
+ * @param aLevel The level of the interface to control - always KSOLInterface
+ * @param aName The command to perform
+ * @param aOption Data to be input/output as a result of the command
+ * @param aSource The source of the command (unused)
+ * @return Standard error codes
+ */
+ {
+ _LOG_L1C3(_L8("CIPv4ProtocolIf::Control [aLevel=%d, aName=%d]"),
+ aLevel, aName);
+
+ if (aLevel == KSOLInterface)
+ {
+ switch (aName)
+ {
+ // General IP configuration commands are below this point.
+
+ case KSoIfInfo:
+ // Gets information about the interface, such as name and MTU.
+ return WriteIfInfo(aOption);
+
+ case KSoIfConfig:
+ // Gets interface configuration, eg. IP address and DNS servers.
+ return WriteIfConfig(aOption);
+
+ case KSoIfGetConnectionInfo:
+ // Gets IAP and network information.
+ return WriteConnectionInfo(aOption);
+
+ case KSoIfHardwareAddr:
+ // unsupported because we don't have a h/w address
+ case KSoIfCompareAddr:
+ // this never actually appears to be called
+ break;
+
+ // 3G-specific configuration commands are below this point.
+#ifdef WCDMA_STUB
+ case KRegisterEventHandler:
+ // Raw IP NIF Events are not supported
+ case KContextSetEvents:
+ // Raw IP NIF Events are not supported
+ break;
+
+ case KContextCreate:
+ // We don't support creating new secondary contexts.
+ break;
+
+ case KContextDelete:
+ // Deletes the primary PDP context. This will shut down the Nif.
+ return DeleteContext(aOption);
+
+ case KContextActivate:
+ // If the IPv4 interface is up, then the context will already have
+ // been activated. So this command should fail with
+ // KErrAlreadyExists
+ {
+ TUint8* ptr = CONST_CAST(TUint8*, aOption.Ptr());
+ TContextParameters* contextParams =
+ REINTERPRET_CAST(TContextParameters*, ptr);
+
+ if (contextParams->iContextInfo.iContextId !=
+ STATIC_CAST(TInt8, GetNifMain().GetBcaController()->Nsapi()))
+ {
+ contextParams->iReasonCode = KErrNotFound;
+ }
+ else
+ {
+ contextParams->iContextInfo.iStatus =
+ GetNifMain().GetContextStatus();
+ contextParams->iReasonCode = KErrAlreadyExists;
+ }
+ return KErrNone;
+ }
+
+ case KNifSetDefaultQoS:
+ case KContextQoSSet:
+ // Setting the QoS is meaningless over GPRS, so we just return that
+ // we don't support these operations.
+ break;
+
+ case KContextTFTModify:
+ // As we only have one primary context, we don't support anything
+ // to do with traffic flow templates, which are used by secondary
+ // contexts.
+ break;
+
+ case KContextModifyActive:
+ // This command is only valid aftermodifying TFT/QoS parameters.
+ // As we don't support any of these operations,
+ // this command is never valid.
+ break;
+#endif
+ default:
+ break;
+ }
+ }
+ return KErrNotSupported;
+ }
+
+TInt CIPv4ProtocolIf::WriteIfConfig(TDes8& aIfConfig)
+/**
+ * Writes the configuration of the interface (eg. IP address, DNS servers)
+ * into the supplied descriptor.
+ *
+ * @param aIfConfig Will contain the interface configuration
+ * @return KErrNotSupported if an incorrect structure is passed,
+ * otherwise KErrNone
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::WriteIfConfig"));
+
+ if (aIfConfig.Length() != sizeof(TSoInetIfConfig))
+ {
+ return KErrArgument;
+ }
+
+ TUint8* ptr = CONST_CAST(TUint8*, aIfConfig.Ptr());
+ TSoInetIfConfig* config = REINTERPRET_CAST(TSoInetIfConfig*, ptr);
+
+ if (config->iFamily != KAfInet)
+ {
+ return KErrNotSupported;
+ }
+
+ TInetAddr::Cast(config->iConfig.iAddress).SetAddress(iSettings.iLocalAddr);
+ TInetAddr::Cast(config->iConfig.iNetMask).SetAddress(iSettings.iNetMask);
+ TInetAddr::Cast(config->iConfig.iBrdAddr).
+ SetAddress(iSettings.iBroadcastAddr);
+ TInetAddr::Cast(config->iConfig.iDefGate).SetAddress(iSettings.iDefGateway);
+ TInetAddr::Cast(config->iConfig.iNameSer1).
+ SetAddress(iSettings.iPrimaryDns);
+ TInetAddr::Cast(config->iConfig.iNameSer2).
+ SetAddress(iSettings.iSecondaryDns);
+
+ return KErrNone;
+ }
+
+TInt CIPv4ProtocolIf::WriteIfInfo(TDes8& aIfInfo)
+/**
+ * Writes information about the interface into the supplied descriptor.
+ *
+ * @param aIfInfo Will contain the interface information
+ * @return KErrArgument if an incorrect structure is passed, otherwise KErrNone
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::WriteIfInfo"));
+
+ if (aIfInfo.Length() != sizeof(TSoIfInfo))
+ {
+ return KErrArgument;
+ }
+
+ TSoIfInfo* info = (TSoIfInfo*) aIfInfo.Ptr();
+ info->iFeatures = KIfCanBroadcast | KIfCanMulticast;
+ info->iSpeedMetric = iSpeedMetric;
+ info->iMtu = KDefaultMtu;
+ WriteIfName(info->iName);
+
+ return KErrNone;
+ }
+
+TInt CIPv4ProtocolIf::WriteConnectionInfo(TDes8& aConnectionInfo)
+/**
+ * Writes information about the IAP and network we're associated with. This
+ * is used to route data in a multi-homing environment.
+ *
+ * @param aConnectionInfo Will contain the connection information
+ * @return Standard CommDB error codes
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::WriteConnectionInfo"));
+
+ TSoIfConnectionInfo* connectionInfo =
+ (TSoIfConnectionInfo*) aConnectionInfo.Ptr();
+
+ TInt err;
+ // Append the 2 commdb filed into this descriptor
+ TBuf<2*KCommsDbSvrMaxColumnNameLength+1> fieldName;
+
+ fieldName.Copy(TPtrC(IAP));
+ fieldName.Append(KSlashChar);
+ fieldName.Append(TPtrC(COMMDB_ID));
+ err = GetNifMain().GetAgent()->ReadInt(fieldName, connectionInfo->iIAPId);
+ if (err != KErrNone)
+ {
+ return err;
+ }
+
+ fieldName.Copy(TPtrC(IAP));
+ fieldName.Append(KSlashChar);
+ fieldName.Append(TPtrC(IAP_NETWORK));
+ err = GetNifMain().GetAgent()->ReadInt(fieldName, connectionInfo->iNetworkId);
+ if (err != KErrNone)
+ {
+ return err;
+ }
+
+ return KErrNone;
+ }
+#ifdef WCDMA_STUB
+
+TInt CIPv4ProtocolIf::DeleteContext(TDes8& aContextParameters)
+/**
+ * Deletes a context. As the NIF is responsible for one primary context,
+ * this is equivalent to closing down the NIF.
+ *
+ * @param aContextParameters Parameters of the context to delete
+ * @return KErrArgument if an incorrect structure is passed, otherwise KErrNone
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::DeleteContext"));
+
+ if (aContextParameters.Length() != sizeof(TContextParameters))
+ {
+ return KErrArgument;
+ }
+
+ TUint8* ptr = CONST_CAST(TUint8*, aContextParameters.Ptr());
+ TContextParameters* params = REINTERPRET_CAST(TContextParameters*, ptr);
+
+ if (params->iContextInfo.iContextId !=
+ STATIC_CAST(TInt8, GetNifMain().GetBcaController()->Nsapi()))
+ {
+ params->iReasonCode = KErrBadName;
+ }
+ else
+ {
+ params->iReasonCode = KErrNone;
+ GetNifMain().Stop(KErrNone, MNifIfNotify::EDisconnect);
+ }
+
+ return KErrNone;
+ }
+
+#endif
+
+void CIPv4ProtocolIf::ReadCommDbGprsSettingsL()
+/**
+ * Reads GPRS IP settings from CommDB via the agent.
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::ReadCommDbGprsSettings"));
+
+ // Read the IP address settings from CommDB.
+ ReadIPv4SettingL(TPtrC(GPRS_IP_ADDR), iSettings.iLocalAddr);
+ ReadIPv4SettingL(TPtrC(GPRS_IP_NETMASK), iSettings.iNetMask);
+ ReadIPv4SettingL(TPtrC(GPRS_IP_NAME_SERVER1), iSettings.iPrimaryDns);
+ ReadIPv4SettingL(TPtrC(GPRS_IP_NAME_SERVER2), iSettings.iSecondaryDns);
+ ReadIPv4SettingL(TPtrC(GPRS_IP_GATEWAY), iSettings.iDefGateway);
+
+ // Read whether to get the gateway IP address from the server.
+ _BTT_LEAVEIFERROR(GetNifMain().GetAgent()->ReadBool(
+ TPtrC(GPRS_IP_ADDR_FROM_SERVER),
+ iSettings.iGetGatewayFromServer));
+
+ // Read whether to get the DNS addresses from the server.
+ _BTT_LEAVEIFERROR(GetNifMain().GetAgent()->ReadBool(
+ TPtrC(GPRS_IP_DNS_ADDR_FROM_SERVER),
+ iSettings.iGetDnsFromServer));
+
+ // Because CommDB doesn't define a Broadcast Address field, we must
+ // calculate the broadcast address. This is based on the localAddr
+ // and the netMask.
+ TInetAddr localAddr(iSettings.iLocalAddr, 0);
+ TInetAddr netMask(iSettings.iNetMask, 0);
+ TInetAddr broadcast;
+ broadcast.SubNetBroadcast(localAddr, netMask);
+ iSettings.iBroadcastAddr = broadcast.Address();
+ }
+
+void CIPv4ProtocolIf::UpdateContextConfigL(const
+ RPacketContext::TContextConfigGPRS&
+ aConfig)
+/**
+ * Called when the context has been activated to set our IP address and get
+ * any other required settings from CommDB.
+ *
+ * @param aConfig The new context config
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::UpdateContextConfig"));
+
+ // Get the settings which are stored in CommDB.
+ ReadCommDbGprsSettingsL();
+
+ // Get our IP address from the GPRS context config.
+ TInetAddr address;
+
+ TBuf<RPacketContext::KMaxPDPAddressLength> tempAddr;
+ tempAddr.Copy(aConfig.iPdpAddress);
+ TInt ret = address.Input(tempAddr);
+
+ // We've got our IP address! Let's save it.
+ if (ret == KErrNone)
+ {
+ iSettings.iLocalAddr = address.Address();
+ LOG_IP_ADDRESS("Got local IP address", iSettings.iLocalAddr);
+ }
+ else
+ {
+ _LOG_L2C2(_L8("Couldn't get IP address from GPRS config (err: %d)"),
+ ret);
+
+ // Don't leave on this error: we may still be OK if we read some
+ // settings from CommDB.
+ }
+
+ // @todo - is this correct. We can only get the DNS addresses
+ // from the TSY using the iProtocolConfigOption data. Yet a client could
+ // access those DNS config details without knowing about the state of the
+ // iSettings.iGetDnsFromServer flag.
+
+ if ((iSettings.iGetDnsFromServer) ||
+ ((iSettings.iPrimaryDns == 0) &&
+ (iSettings.iSecondaryDns == 0)) )
+ {
+ TBuf<RPacketContext::KMaxPDPAddressLength> tempAddr;
+ tempAddr.Copy(aConfig.iProtocolConfigOption.iDnsAddresses.iPrimaryDns);
+ ret = address.Input(tempAddr);
+
+ if (ret == KErrNone)
+ {
+ iSettings.iPrimaryDns = address.Address();
+ LOG_IP_ADDRESS("Got primary DNS", iSettings.iPrimaryDns);
+ }
+ else
+ {
+ _LOG_L2C2(_L8("Couldn't get primary DNS address from GPRS config (err: %d)"),
+ ret);
+
+ // Don't leave on this error: we may still be OK if we read some
+ // settings from CommDB.
+ }
+
+ tempAddr.Copy(aConfig.iProtocolConfigOption.iDnsAddresses.iSecondaryDns);
+ ret = address.Input(tempAddr);
+
+ if (ret == KErrNone)
+ {
+ iSettings.iSecondaryDns = address.Address();
+ LOG_IP_ADDRESS("Got secondary DNS", iSettings.iPrimaryDns);
+ }
+ else
+ {
+ _LOG_L2C2(_L8("Couldn't get secondary DNS address from GPRS config (err: %d)"),
+ ret);
+
+ // Don't leave on this error: we may still be OK if we read some
+ // settings from CommDB.
+ }
+ }
+ else
+ {
+ LOG_IP_ADDRESS("Using CommDB DNS address - Primary ", iSettings.iPrimaryDns);
+ LOG_IP_ADDRESS(" - Secondary ", iSettings.iSecondaryDns);
+ }
+
+
+ // TProtocolConfigOptionV2::iMiscBuffer is not the correct way to pass a gateway
+ // address - data needs to be passed in TLV format but there are no TLV content tags
+ // defined for a gateway address and any UMTS/GPRS hardware which claims to be able
+ // to supply this address is erroneous (3gpp standard 24.008, section 10.5.6.3).
+ // This misuse of iMiscBuffer was preventing other correctly formed parameters from
+ // being passed (INC113612).
+/* if (iSettings.iGetGatewayFromServer)
+ {
+ tempAddr.Copy(aConfig.iProtocolConfigOption.iMiscBuffer);
+ ret = address.Input(tempAddr);
+
+ if (ret == KErrNone)
+ {
+ iSettings.iDefGateway = address.Address();
+ LOG_IP_ADDRESS("Got default gateway", iSettings.iDefGateway);
+ }
+ else
+ {
+ _LOG_L2C2(_L8("Couldn't get default gateway from GPRS config (err: %d)"),
+ ret);
+ }
+ }*/
+ }
+
+void CIPv4ProtocolIf::UpdateConnectionSpeed(TUint aConnectionSpeed)
+/**
+ * Sets the speed metric to return to TCP/IP, based on what the TSY tells us.
+ *
+ * @param aConnectionSpeed Our connection speed
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::UpdateConnectionSpeed"));
+
+ iSpeedMetric = aConnectionSpeed;
+ }
+
+void CIPv4ProtocolIf::ReadIPv4SettingL(const TDesC& aFieldName,
+ TUint32& aIpAddr)
+/**
+ * Reads an IPv4 address from CommDB, via the TRP agent. It leaves if an error
+ * other than KErrNotFound occurs.
+ *
+ * @param aFieldName The name of the field to read
+ * @param aIpAddr Will contain the IP address
+ */
+ {
+#ifdef __BTT_LOGGING__
+ TBuf8<256> debugBuffer;
+ debugBuffer.Copy(aFieldName);
+ _LOG_L1C2(_L8("CIPv4ProtocolIf::ReadIp4Setting [aFieldName=%S]"),
+ &debugBuffer);
+#endif
+
+ TBuf<KCommsDbSvrMaxFieldLength> name;
+ TInetAddr ip4Addr;
+
+ TInt ret = GetNifMain().GetAgent()->ReadDes(aFieldName, name);
+
+ if (ret == KErrNone)
+ {
+ // We've successfully read an IP address, so convert it into a number.
+ ip4Addr.Input(name);
+ aIpAddr = ip4Addr.Address();
+ }
+ else
+ {
+ // We couldn't get the IP address, so set it to 0.0.0.0. Note that we
+ // only leave here if we got a more serious error than "not found".
+ aIpAddr = 0;
+ if (ret != KErrNotFound)
+ {
+ _BTT_LEAVEIFERROR(ret);
+ }
+ }
+ }
+
+TInt CIPv4ProtocolIf::Send(RMBufChain& aPdu, TAny* aSource)
+/**
+ * Called by the protocol to send an outgoing IP packet to the network.
+ *
+ * @param aPdu The outgoing packet
+ * @param aSource The source of the packet
+ * @return Standard error codes
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::Send"));
+
+#ifdef __BTT_LOGGING__
+ LogPacket(aPdu);
+#endif
+
+ // Return <0: an error occurred
+ // Return 0: no error, but don't send any more packets
+
+ return GetNifMain().SendPacket(aPdu, aSource, KIp4FrameType);
+ }
+
+void CIPv4ProtocolIf::Info(TNifIfInfo& aInfo) const
+/**
+ * Called by the protocol to get information about the NIF.
+ *
+ * @param aInfo Will contain NIF information
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::Info"));
+
+ // The parent class sets everything except the name...
+ CProtocolIfBase::Info(aInfo);
+ // ...which we set here.
+ WriteIfName(aInfo.iName);
+ }
+
+TInt CIPv4ProtocolIf::Notification(TAgentToNifEventType /*aEvent*/,
+ void* /*aInfo*/)
+/**
+ * The Nif will ignore any notification sent
+ *
+ * @param aEvent Not used
+ * @param aInfo Not used
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::Notification"));
+
+ return KErrNone;
+ }
+
+void CIPv4ProtocolIf::StartSending(CProtocolBase* aProtocol)
+/**
+ * Indicates to the protocol layer that the NIF is ready to send packets.
+ *
+ * @param aProtocol A pointer to a protocol
+ */
+ {
+ _LOG_L1C2(_L8("CIPv4ProtocolIf::StartSending [aProtocol=%X]"), aProtocol);
+
+ CProtocolIfBase::StartSending(aProtocol);
+ }
+
+TBool CIPv4ProtocolIf::WantsProtocol(TUint16 aProtocolCode)
+/**
+ * Indicates the type of protocol implemented by this class.
+ *
+ * @param aProtocolCode The protocol type
+ */
+ {
+ _LOG_L1C2(_L8("CIPv4ProtocolIf::WantsProtocol [aProtocolCode=%X]"),
+ aProtocolCode);
+
+#ifdef RAWIP_HEADER_APPENDED_TO_PACKETS
+ return ((aProtocolCode & 0x00FF) == KIp4FrameType);
+#else
+ (void) aProtocolCode; // disable compiler warning
+ return ETrue;
+#endif // RAWIP_HEADER_APPENDED_TO_PACKETS
+ }
+
+void CIPv4ProtocolIf::Process(RMBufChain& aPdu)
+/**
+ * Called when an incoming IP packet has arrived. Send packets up to the
+ * TCP/IP stack.
+ *
+ * @param aPdu The incoming packet
+ */
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::Process"));
+
+#ifdef __BTT_LOGGING__
+ LogPacket(aPdu);
+#endif
+
+ // Pass incoming packets up to the protocol, unless it hasn't
+ // been bound yet.
+ if (iProtocol)
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf: Packet Sent to TCP/IP Protocol!!!"));
+ iProtocol->Process(aPdu, reinterpret_cast<CProtocolBase*>(this));
+ }
+ else
+ {
+ _LOG_L2C1(_L8("WARNING: dumping incoming packet, no protocol bound"));
+ aPdu.Free();
+ }
+ }
+
+#ifdef __BTT_LOGGING__
+void CIPv4ProtocolIf::LogPacket(const RMBufChain& aPacket)
+/**
+* Logs packet information into log file.
+*
+* @param aPacket The packet
+*/
+ {
+ _LOG_L1C1(_L8("CIPv4ProtocolIf::LogPacket"));
+
+ TInt mBufLength = aPacket.Length() - aPacket.First()->Length();
+
+ _LOG_L3C2(_L8("Analysis of %d byte packet:"), mBufLength);
+
+ //Note: All the constants used on this method are a pragmatic guess of the
+ //IP header fields. The only porpose of this method is logging.
+
+ if (mBufLength < 20)
+ {
+ _LOG_L3C2(_L8(" -doesn't appear to be a valid IPv4 packet (length=%d)")
+ , mBufLength);
+ return;
+ }
+
+ // Get a pointer to the packet's payload.
+ const TUint8* payloadPtr = aPacket.First()->Next()->Ptr();
+
+ if ((payloadPtr[0] & 0xF0) != 0x40)
+ {
+ _LOG_L3C2(_L8(" - doesn't appear to be an IPv4 packet (version=0x%X)"),
+ (payloadPtr[0] & 0xF0) >> 4);
+ return;
+ }
+
+ if ((payloadPtr[0] & 0xF) != 0x5)
+ {
+ _LOG_L3C2(_L8(" - doesn't have a standard IP header (length=0x%X)"),
+ payloadPtr[0] & 0xF);
+ return;
+ }
+
+ _LOG_L3C5(_L8(" - src addr: %d.%d.%d.%d"), payloadPtr[12], payloadPtr[13],
+ payloadPtr[14], payloadPtr[15]);
+ _LOG_L3C5(_L8(" - dst addr: %d.%d.%d.%d"), payloadPtr[16], payloadPtr[17],
+ payloadPtr[18], payloadPtr[19]);
+
+ if (payloadPtr[9] == 0x06)
+ {
+ _LOG_L3C1(_L8(" - appears to be a TCP packet"));
+ if (mBufLength < 40)
+ {
+ _LOG_L3C2(_L8(" - but is too short (length=0x%X)"), mBufLength);
+ return;
+ }
+ _LOG_L3C3(_L8(" - src port: %d, dst port: %d"),
+ (payloadPtr[20] << 8) + payloadPtr[21],
+ (payloadPtr[22] << 8) + payloadPtr[23]);
+ _LOG_L3C3(_L8(" - seq #: 0x%08X, ack #: 0x%08X"),
+ (payloadPtr[24] << 24) + (payloadPtr[25] << 16) +
+ (payloadPtr[26] << 8) + payloadPtr[27],
+ (payloadPtr[28] << 24) + (payloadPtr[29] << 16) +
+ (payloadPtr[30] << 8) + payloadPtr[31]);
+
+ TBuf8<100> flagsSet;
+ flagsSet.Copy(_L8(" - flags set: "));
+
+ // Write description of payload's flags to "flagsSet"
+ if (payloadPtr[33] & 0x01)
+ {
+ flagsSet.Append(_L8("FIN "));
+ }
+ if (payloadPtr[33] & 0x02)
+ {
+ flagsSet.Append(_L8("SYN "));
+ }
+ if (payloadPtr[33] & 0x04)
+ {
+ flagsSet.Append(_L8("RST "));
+ }
+ if (payloadPtr[33] & 0x08)
+ {
+ flagsSet.Append(_L8("PSH "));
+ }
+ if (payloadPtr[33] & 0x10)
+ {
+ flagsSet.Append(_L8("ACK "));
+ }
+ if (payloadPtr[33] & 0x20)
+ {
+ flagsSet.Append(_L8("URG "));
+ }
+ _LOG_L3C1(flagsSet);
+
+ TInt dataOffset = payloadPtr[32] >> 2; // in bytes
+ if ((dataOffset > 0) && (mBufLength > dataOffset + 30))
+ {
+ TBuf8<100> data;
+ data.Copy(_L8(" - data begins: "));
+ for (TInt i = dataOffset + 20; i < dataOffset + 100; i++)
+ {
+ // We skip some bytes at the end of the MBuf, as they're junk.
+ if (i >= (mBufLength - 10))
+ {
+ break;
+ }
+ if (TChar(payloadPtr[i]).IsPrint())
+ {
+ data.Append(TChar(payloadPtr[i]));
+ }
+ else
+ {
+ data.Append(TChar('?'));
+ }
+ }
+ _LOG_L3C1(data);
+ }
+ }
+ else if (payloadPtr[9] == 0x01)
+ {
+ _LOG_L3C1(_L8(" - appears to be an ICMP packet"));
+ if (mBufLength < 24)
+ {
+ _LOG_L3C2(_L8(" - but is too short (length=0x%X)"), mBufLength);
+ return;
+ }
+
+ if (payloadPtr[20] == 0x8)
+ {
+ _LOG_L3C1(_L8(" - is an echo request"));
+ }
+ else if (payloadPtr[20] == 0x0)
+ {
+ _LOG_L3C1(_L8(" - is an echo reply"));
+ }
+ else
+ {
+ _LOG_L3C2(_L8(" - unknown type (0x%02X)"), payloadPtr[20]);
+ return;
+ }
+
+ if (mBufLength >= 28)
+ {
+ _LOG_L3C3(_L8(" - ID: 0x%04X, seq #: 0x%04X"),
+ (payloadPtr[24] << 8) + payloadPtr[25],
+ (payloadPtr[26] << 8) + payloadPtr[27]);
+ }
+ }
+ else if (payloadPtr[9] == 0x11)
+ {
+ _LOG_L3C1(_L8(" - appears to be a UDP packet"));
+ if (mBufLength < 28)
+ {
+ _LOG_L3C2(_L8(" - but is too short (length=0x%X)"), mBufLength);
+ return;
+ }
+ _LOG_L3C3(_L8(" - src port: %d, dst port: %d"),
+ (payloadPtr[20] << 8) + payloadPtr[21],
+ (payloadPtr[22] << 8) + payloadPtr[23]);
+ }
+ else
+ {
+ _LOG_L3C2(_L8(" - appears to be for an unknown protocol (0x%X)"),
+ payloadPtr[9]);
+ }
+ }
+#endif // __BTT_LOGGING__