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DatabaseLookup for RouterInfo

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orignal 2015-01-04 17:25:16 -05:00
parent 37a374000c
commit 8812a45607
3 changed files with 24 additions and 50 deletions
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64
I2NPProtocol.cpp
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@ -99,9 +99,8 @@ namespace i2p
return m;
}
I2NPMessage * CreateDatabaseLookupMsg (const uint8_t * key, const uint8_t * from,
uint32_t replyTunnelID, bool exploratory, std::set<i2p::data::IdentHash> * excludedPeers,
bool encryption, i2p::tunnel::TunnelPool * pool)
I2NPMessage * CreateRouterInfoDatabaseLookupMsg (const uint8_t * key, const uint8_t * from,
uint32_t replyTunnelID, bool exploratory, std::set<i2p::data::IdentHash> * excludedPeers)
{
I2NPMessage * m = NewI2NPMessage ();
uint8_t * buf = m->GetPayload ();
@ -109,60 +108,37 @@ namespace i2p
buf += 32;
memcpy (buf, from, 32); // from
buf += 32;
uint8_t flag = exploratory ? 0x0C : 0x08; // 1000 - RI, 1100 -exporatory
if (replyTunnelID)
{
*buf = encryption ? 0x03: 0x01; // set delivery flag
*buf = flag | 0x01; // set delivery flag
htobe32buf (buf+1, replyTunnelID);
buf += 5;
}
else
{
encryption = false; // encryption can we set for tunnels only
*buf = 0; // flag
*buf = flag; // flag
buf++;
}
if (exploratory)
if (excludedPeers)
{
htobe16buf (buf,1); // one exlude record
int cnt = excludedPeers->size ();
htobe16buf (buf, cnt);
buf += 2;
// reply with non-floodfill routers only
memset (buf, 0, 32);
buf += 32;
for (auto& it: *excludedPeers)
{
memcpy (buf, it, 32);
buf += 32;
}
}
else
{
if (excludedPeers)
{
int cnt = excludedPeers->size ();
htobe16buf (buf, cnt);
buf += 2;
for (auto& it: *excludedPeers)
{
memcpy (buf, it, 32);
buf += 32;
}
}
else
{
// nothing to exclude
htobuf16 (buf, 0);
buf += 2;
}
}
if (encryption)
{
// session key and tag for reply
auto& rnd = i2p::context.GetRandomNumberGenerator ();
rnd.GenerateBlock (buf, 32); // key
buf[32] = 1; // 1 tag
rnd.GenerateBlock (buf + 33, 32); // tag
if (pool && pool->GetLocalDestination ())
pool->GetLocalDestination ()->SubmitSessionKey (buf, buf + 33); // introduce new key-tag to garlic engine
else
LogPrint ("Destination for encrypteed reply not specified");
buf += 65;
}
{
// nothing to exclude
htobuf16 (buf, 0);
buf += 2;
}
m->len += (buf - m->GetPayload ());
FillI2NPMessageHeader (m, eI2NPDatabaseLookup);
return m;