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added another anti-lag strategy in pqissl.cc. This is to avoid connexion problems

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1060 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2009-03-01 15:12:22 +00:00
parent 8ad457e011
commit 14dc2fbf7e
1 changed files with 21 additions and 3 deletions
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24
libretroshare/src/pqi/pqissl.cc
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@ -1409,12 +1409,30 @@ int pqissl::senddata(void *data, int len)
int pqissl::readdata(void *data, int len)
{
int total_len = 0 ;
// There is a do, because packets can be splitted into multiple ssl buffers
// when they are larger than 16384 bytes. Such packets have to be read in
// multiple slices.
do
{
int tmppktlen = SSL_read(ssl_connection, (void*)((unsigned long int)data+(unsigned long int)total_len), len-total_len);
static const int max_tries = 50 ;
int nbtries = 0 ;
int tmppktlen ;
// std::cerr <<"pqissl: read " << tmppktlen+total_len << " bytes. expected " << len << ", still " << len-(tmppktlen+total_len) << " to read"<< std::endl ;
// need to catch errors.....
// This is a loop to prevent loosing a connexion just because there is a
// lag in the network. This happens quite often actually. The total time
// to wait if nothing happens is 50*20ms = 1 sec, which is not so much.
// This current version seems to work fine.
//
while( -1 == (tmppktlen = SSL_read(ssl_connection, (void*)((unsigned long int)data+(unsigned long int)total_len), len-total_len)) && nbtries++ < max_tries)
#ifdef WIN32
Sleep(20) ;
#else
usleep(20000) ;
#endif
// Need to catch errors.....
//
if (tmppktlen <= 0) // probably needs a reset.
{
std::ostringstream out;