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added a workaround for a bug in the cache system that asks for files of size 2^64-1. This results into a division by zero in ftChunkMap. Bu the time I find this bug, the workaroudn should avoid crashes.

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5.0@2931 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2010-05-17 21:02:51 +00:00
parent 531149d3bd
commit f24b3c61f4
1 changed files with 14 additions and 0 deletions
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14
libretroshare/src/ft/ftcontroller.cc
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@ -972,6 +972,20 @@ bool ftController::FileRequest(std::string fname, std::string hash,
return true ;
}
// Bugs in the cache system can cause files with arbitrary size to be
// requested, causing a division by zero in ftChunkMap when size > 1MB *
// (2^32-1). I thus conservatively check for large size values.
//
if(size >= 1024ull*1024ull*((1ull << 32) - 1))
{
std::cerr << "FileRequest Error: unexpected size. This is probably a bug." << std::endl;
std::cerr << " name = " << fname << std::endl ;
std::cerr << " flags = " << flags << std::endl ;
std::cerr << " dest = " << dest << std::endl ;
std::cerr << " size = " << size << std::endl ;
return false ;
}
/* If file transfer is not enabled ....
* save request for later. This will also
* mean that we will have to copy local files,