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Push remote surface as reported by peers along with known interface direct paths to assist with (some) NAT traversal. (trying this, may back out if not effective)

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This commit is contained in:
Adam Ierymenko 2015-07-27 17:02:43 -07:00
parent e30ba3e138
commit f0003ea922
3 changed files with 37 additions and 4 deletions
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19
node/Peer.cpp
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@ -33,6 +33,7 @@
#include "Switch.hpp"
#include "Network.hpp"
#include "AntiRecursion.hpp"
#include "SelfAwareness.hpp"
#include <algorithm>
@ -229,6 +230,24 @@ void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_
_lastDirectPathPush = now;
std::vector<Path> dps(RR->node->directPaths());
/* Also push paths reported to us by non-root-server peers. This assists
* with NAT traversal behind NATs that engage in strange or randomized
* port assignment behavior. */
std::vector<Address> rootAddresses(RR->topology->rootAddresses());
std::vector< std::pair<Address,InetAddress> > surface(RR->sa->getReportedSurface());
for(std::vector< std::pair<Address,InetAddress> >::const_iterator s(surface.begin());s!=surface.end();++s) {
bool alreadyHave = false;
for(std::vector<Path>::const_iterator p(dps.begin());p!=dps.end();++p) {
if (p->address() == s->second) {
alreadyHave = true;
break;
}
}
if ((!alreadyHave)&&(std::find(rootAddresses.begin(),rootAddresses.end(),s->first) == rootAddresses.end()))
dps.push_back(Path(s->second,0,Path::TRUST_NORMAL));
}
#ifdef ZT_TRACE
{
std::string ps;