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more precise router selection

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orignal 2021-07-26 17:51:32 -04:00
parent 99c7d5c23a
commit a6937c792f
1 changed files with 26 additions and 16 deletions
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42
libi2pd/NetDb.cpp
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@ -1223,24 +1223,34 @@ namespace data
{
if (m_RouterInfos.empty())
return 0;
uint32_t ind = rand () % m_RouterInfos.size ();
for (int j = 0; j < 2; j++)
std::unique_lock<std::mutex> l(m_RouterInfosMutex);
auto ind = rand () % m_RouterInfos.size ();
auto it = m_RouterInfos.begin ();
std::advance (it, ind);
// try random router
if (it != m_RouterInfos.end () && !it->second->IsUnreachable () && filter (it->second))
return it->second;
// try closest routers
auto it1 = it; it1++;
// forward
while (it1 != m_RouterInfos.end ())
{
uint32_t i = 0;
std::unique_lock<std::mutex> l(m_RouterInfosMutex);
for (const auto& it: m_RouterInfos)
{
if (i >= ind)
{
if (!it.second->IsUnreachable () && filter (it.second))
return it.second;
}
else
i++;
}
// we couldn't find anything, try second pass
ind = 0;
if (!it1->second->IsUnreachable () && filter (it1->second))
return it1->second;
it1++;
}
// still not found, try from the beginning
if (ind)
{
it1 = m_RouterInfos.begin ();
while (it1 != it || it1 != m_RouterInfos.end ())
{
if (!it1->second->IsUnreachable () && filter (it1->second))
return it1->second;
it1++;
}
}
return nullptr; // seems we have too few routers
}