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Added deferred check of chunks during file transfer. Chunk sha1 sums are requested to the sources and checked for downloaded data.

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Validated chunks are shared to other peers. Force check is now very simple since it just turns all chunks into "needs checking" mode
and sums are asked to sources. Sources maintain a temporary cache of chunks. Since sums are requested sparsely, this should not 
affect the sources in terms of performance. We can still imagine precomputing and saving sha1 of chunks while hashing them.

For backward compatibility reasons, the following has been setup *temporarily* in this version:
- unvalidated chunks are still considered as already obtained, and are shared and saved
- force check has been disabled
- final file check is maintained
- in case of file fail, the old checking mode will be used.

All changes for next version are kept in the define 'USE_NEW_CHUNK_CHECKING_CODE' that will be made the default in a few weeks.
At start, I expect most chunk to stya yellow during download, until most sources are able to provide chunk hashs.




git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5019 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2012-03-15 19:55:43 +00:00
parent 7ab5b54266
commit 889a2b2433
31 changed files with 1540 additions and 35 deletions
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8
libretroshare/src/turtle/p3turtle.h
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@ -301,6 +301,12 @@ class p3turtle: public p3Service, /*public pqiMonitor,*/ public RsTurtle,/* publ
/// Send a crc32 map of this file to the given peer
void sendCRC32Map(const std::string& peerId, const std::string& hash,const CRC32Map& cmap) ;
/// Send a request for the CRC of a single chunk of this file to the given peer
void sendSingleChunkCRCRequest(const std::string& peerId, const std::string& hash,uint32_t chunk_number) ;
/// Send a crc32 map of this file to the given peer
void sendSingleChunkCRC(const std::string& peerId, const std::string& hash,uint32_t chunk_number,const Sha1CheckSum& sum) ;
private:
//--------------------------- Admin/Helper functions -------------------------//
@ -352,6 +358,8 @@ class p3turtle: public p3Service, /*public pqiMonitor,*/ public RsTurtle,/* publ
void handleRecvFileMap(RsTurtleFileMapItem*);
void handleRecvFileCRC32MapRequest(RsTurtleFileCrcRequestItem*);
void handleRecvFileCRC32Map(RsTurtleFileCrcItem*);
void handleRecvChunkCRCRequest(RsTurtleChunkCrcRequestItem*);
void handleRecvChunkCRC(RsTurtleChunkCrcItem*);
//------ Functions connecting the turtle router to other components.----------//