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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // in_net.h - network layer protocol |
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15 // |
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16 |
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17 |
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18 |
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19 /** |
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20 @internalComponent |
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21 */ |
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22 #ifndef __IN_NET_H__ |
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23 #define __IN_NET_H__ |
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24 |
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25 #include "inet.h" |
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26 |
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27 const TUint KNetDefaultRecvBuf = 8192; // Default receive buffer limit for SAP's (ICMP & IP) |
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28 |
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29 // |
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30 // This is not a good class. It is misnamed. -- msa |
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31 // It is used by IP and ICMP, mainly for |
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32 // its Async buffer queues, i really would need something different.. |
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33 // |
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34 class CProtocolInet6Network : public CProtocolInet6Base |
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35 { |
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36 // |
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37 // Generic |
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38 // |
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39 public: |
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40 virtual ~CProtocolInet6Network(); |
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41 virtual void StartL(); |
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42 |
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43 inline TInt QueueLimit() { return iQueueLimit; } |
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44 protected: |
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45 // |
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46 // The initial buffer limit for SAP's receive queues |
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47 // created under this protocol (see. iQueueLimit on |
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48 // CProviderInet6Network for interpretation). |
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49 TInt iQueueLimit; |
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50 |
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51 virtual void Deliver(/*const*/ RMBufPacketBase &aPacket); |
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52 }; |
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53 |
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54 |
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55 class CProviderInet6Network : public CProviderInet6Base |
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56 { |
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57 public: |
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58 CProviderInet6Network(CProtocolInet6Base *aProtocol) : CProviderInet6Base(aProtocol) {} |
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59 virtual ~CProviderInet6Network(); |
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60 virtual void InitL(); |
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61 virtual void Shutdown(TCloseType option); |
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62 virtual void Process(RMBufChain& aPacket, CProtocolBase *aSourceProtocol = NULL); |
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63 virtual void GetData(TDes8 &aDesc, TUint options, TSockAddr *anAddr=NULL); |
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64 virtual TInt GetData(RMBufChain& aData, TUint aLength, TUint aOptions, TSockAddr* anAddr=NULL); |
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65 virtual TInt SetLocalName(TSockAddr &anAddr); |
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66 virtual void AutoBind(); |
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67 |
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68 // IsReceiving is intended for the protocol side. It is can be used by |
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69 // the protocol side "Deliver" method to ask if this SAP is willing to |
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70 // receive packets associated with the specified id. What the "id" is, |
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71 // depends on the protocol. For, example, for IP level SAP/PRT pair, the |
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72 // id is the protocol of the received packet (e.g. protocol or next header |
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73 // field from the IP header). |
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74 virtual TBool IsReceiving(const RMBufPktInfo &aInfo); |
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75 protected: |
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76 RMBufPktQ iRecvQ; |
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77 // |
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78 // iQueueLimit is used to control how much buffered data is allowed |
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79 // to be in the iRecvQ, before "congestion" control hits. The value counts |
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80 // bytes in iRecvQ in following way |
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81 // - if iQueueLimit < 0, then incoming packet is dropped (= "congestion") |
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82 // - if iQueueLimit >= 0, then incoming packet is added into iRecvQ, and |
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83 // the length of the packet is subtracted from the iQueueLimit. When |
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84 // GetData removes the packet from the queue, the length is added back |
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85 // to iQueueLimit. |
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86 // Thus, if left as initial value (= 0), only one packet at time can be |
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87 // queued. If initialized to 8000, then at most 8000 bytes and 1 packet |
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88 // can be queued at any point. |
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89 TInt iQueueLimit; |
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90 TInt iPacketsDropped; // Count packets dropped due "congestion" |
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91 TUint iInputStopped:1; |
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92 }; |
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93 |
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94 #endif |