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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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632 lines
20 KiB
632 lines
20 KiB
#include <string.h> |
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#include <atomic> |
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#include "I2PEndian.h" |
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#include <cryptopp/gzip.h> |
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#include "ElGamal.h" |
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#include "Timestamp.h" |
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#include "RouterContext.h" |
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#include "NetDb.h" |
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#include "Tunnel.h" |
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#include "base64.h" |
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#include "Transports.h" |
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#include "Garlic.h" |
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#include "I2NPProtocol.h" |
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using namespace i2p::transport; |
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namespace i2p |
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{ |
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I2NPMessage * NewI2NPMessage () |
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{ |
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return new I2NPMessageBuffer<I2NP_MAX_MESSAGE_SIZE>(); |
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} |
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I2NPMessage * NewI2NPShortMessage () |
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{ |
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return new I2NPMessageBuffer<I2NP_MAX_SHORT_MESSAGE_SIZE>(); |
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} |
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I2NPMessage * NewI2NPMessage (size_t len) |
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{ |
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return (len < I2NP_MAX_SHORT_MESSAGE_SIZE/2) ? NewI2NPShortMessage () : NewI2NPMessage (); |
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} |
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void DeleteI2NPMessage (I2NPMessage * msg) |
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{ |
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delete msg; |
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} |
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static std::atomic<uint32_t> I2NPmsgID(0); // TODO: create class |
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void FillI2NPMessageHeader (I2NPMessage * msg, I2NPMessageType msgType, uint32_t replyMsgID) |
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{ |
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msg->SetTypeID (msgType); |
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if (replyMsgID) // for tunnel creation |
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msg->SetMsgID (replyMsgID); |
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else |
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{ |
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msg->SetMsgID (I2NPmsgID); |
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I2NPmsgID++; |
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} |
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msg->SetExpiration (i2p::util::GetMillisecondsSinceEpoch () + 5000); // TODO: 5 secs is a magic number |
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msg->UpdateSize (); |
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msg->UpdateChks (); |
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} |
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void RenewI2NPMessageHeader (I2NPMessage * msg) |
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{ |
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if (msg) |
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{ |
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msg->SetMsgID (I2NPmsgID); |
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I2NPmsgID++; |
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msg->SetExpiration (i2p::util::GetMillisecondsSinceEpoch () + 5000); |
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} |
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} |
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I2NPMessage * CreateI2NPMessage (I2NPMessageType msgType, const uint8_t * buf, int len, uint32_t replyMsgID) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (len); |
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memcpy (msg->GetPayload (), buf, len); |
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msg->len += len; |
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FillI2NPMessageHeader (msg, msgType, replyMsgID); |
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return msg; |
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} |
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I2NPMessage * CreateI2NPMessage (const uint8_t * buf, int len, i2p::tunnel::InboundTunnel * from) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (); |
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memcpy (msg->GetBuffer (), buf, len); |
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msg->len = msg->offset + len; |
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msg->from = from; |
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return msg; |
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} |
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I2NPMessage * CreateDeliveryStatusMsg (uint32_t msgID) |
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{ |
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I2NPMessage * m = NewI2NPMessage (); |
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uint8_t * buf = m->GetPayload (); |
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if (msgID) |
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{ |
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htobe32buf (buf + DELIVERY_STATUS_MSGID_OFFSET, msgID); |
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htobe64buf (buf + DELIVERY_STATUS_TIMESTAMP_OFFSET, i2p::util::GetMillisecondsSinceEpoch ()); |
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} |
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else // for SSU establishment |
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{ |
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htobe32buf (buf + DELIVERY_STATUS_MSGID_OFFSET, i2p::context.GetRandomNumberGenerator ().GenerateWord32 ()); |
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htobe64buf (buf + DELIVERY_STATUS_TIMESTAMP_OFFSET, 2); // netID = 2 |
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} |
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m->len += DELIVERY_STATUS_SIZE; |
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FillI2NPMessageHeader (m, eI2NPDeliveryStatus); |
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return m; |
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} |
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I2NPMessage * CreateDatabaseLookupMsg (const uint8_t * key, const uint8_t * from, |
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uint32_t replyTunnelID, bool exploratory, std::set<i2p::data::IdentHash> * excludedPeers, |
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bool encryption, i2p::tunnel::TunnelPool * pool) |
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{ |
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I2NPMessage * m = NewI2NPMessage (); |
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uint8_t * buf = m->GetPayload (); |
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memcpy (buf, key, 32); // key |
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buf += 32; |
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memcpy (buf, from, 32); // from |
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buf += 32; |
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if (replyTunnelID) |
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{ |
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*buf = encryption ? 0x03: 0x01; // set delivery flag |
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htobe32buf (buf+1, replyTunnelID); |
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buf += 5; |
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} |
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else |
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{ |
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encryption = false; // encryption can we set for tunnels only |
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*buf = 0; // flag |
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buf++; |
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} |
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if (exploratory) |
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{ |
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htobe16buf (buf,1); // one exlude record |
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buf += 2; |
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// reply with non-floodfill routers only |
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memset (buf, 0, 32); |
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buf += 32; |
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} |
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else |
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{ |
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if (excludedPeers) |
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{ |
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int cnt = excludedPeers->size (); |
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htobe16buf (buf, cnt); |
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buf += 2; |
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for (auto& it: *excludedPeers) |
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{ |
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memcpy (buf, it, 32); |
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buf += 32; |
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} |
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} |
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else |
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{ |
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// nothing to exclude |
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htobuf16 (buf, 0); |
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buf += 2; |
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} |
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} |
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if (encryption) |
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{ |
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// session key and tag for reply |
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auto& rnd = i2p::context.GetRandomNumberGenerator (); |
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rnd.GenerateBlock (buf, 32); // key |
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buf[32] = 1; // 1 tag |
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rnd.GenerateBlock (buf + 33, 32); // tag |
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if (pool && pool->GetLocalDestination ()) |
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pool->GetLocalDestination ()->SubmitSessionKey (buf, buf + 33); // introduce new key-tag to garlic engine |
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else |
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LogPrint ("Destination for encrypteed reply not specified"); |
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buf += 65; |
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} |
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m->len += (buf - m->GetPayload ()); |
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FillI2NPMessageHeader (m, eI2NPDatabaseLookup); |
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return m; |
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} |
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I2NPMessage * CreateLeaseSetDatabaseLookupMsg (const i2p::data::IdentHash& dest, |
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const std::set<i2p::data::IdentHash>& excludedFloodfills, |
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const i2p::tunnel::InboundTunnel * replyTunnel, const uint8_t * replyKey, const uint8_t * replyTag) |
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{ |
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I2NPMessage * m = NewI2NPMessage (); |
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uint8_t * buf = m->GetPayload (); |
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memcpy (buf, dest, 32); // key |
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buf += 32; |
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memcpy (buf, replyTunnel->GetNextIdentHash (), 32); // reply tunnel GW |
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buf += 32; |
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*buf = 7; // flags (01 - tunnel, 10 - encrypted, 0100 - LS lookup |
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htobe32buf (buf + 1, replyTunnel->GetNextTunnelID ()); // reply tunnel ID |
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buf += 5; |
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// excluded |
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int cnt = excludedFloodfills.size (); |
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htobe16buf (buf, cnt); |
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buf += 2; |
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if (cnt > 0) |
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{ |
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for (auto& it: excludedFloodfills) |
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{ |
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memcpy (buf, it, 32); |
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buf += 32; |
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} |
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} |
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// encryption |
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memcpy (buf, replyKey, 32); |
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buf[32] = 1; // 1 tag |
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memcpy (buf + 33, replyTag, 32); |
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buf += 65; |
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m->len += (buf - m->GetPayload ()); |
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FillI2NPMessageHeader (m, eI2NPDatabaseLookup); |
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return m; |
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} |
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I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, |
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const i2p::data::RouterInfo * floodfill) |
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{ |
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I2NPMessage * m = NewI2NPShortMessage (); |
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uint8_t * buf = m->GetPayload (); |
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size_t len = 0; |
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memcpy (buf, ident, 32); |
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len += 32; |
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buf[len] = floodfill ? 1 : 0; // 1 router for now |
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len++; |
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if (floodfill) |
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{ |
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memcpy (buf + len, floodfill->GetIdentHash (), 32); |
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len += 32; |
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} |
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memcpy (buf + len, i2p::context.GetRouterInfo ().GetIdentHash (), 32); |
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len += 32; |
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m->len += len; |
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FillI2NPMessageHeader (m, eI2NPDatabaseSearchReply); |
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return m; |
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} |
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I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::RouterInfo * router) |
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{ |
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if (!router) // we send own RouterInfo |
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router = &context.GetRouterInfo (); |
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I2NPMessage * m = NewI2NPShortMessage (); |
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uint8_t * payload = m->GetPayload (); |
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memcpy (payload + DATABASE_STORE_KEY_OFFSET, router->GetIdentHash (), 32); |
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payload[DATABASE_STORE_TYPE_OFFSET] = 0; |
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htobe32buf (payload + DATABASE_STORE_REPLY_TOKEN_OFFSET, 0); |
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CryptoPP::Gzip compressor; |
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compressor.Put (router->GetBuffer (), router->GetBufferLen ()); |
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compressor.MessageEnd(); |
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auto size = compressor.MaxRetrievable (); |
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uint8_t * buf = payload + DATABASE_STORE_HEADER_SIZE; |
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htobe16buf (buf, size); // size |
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buf += 2; |
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// TODO: check if size doesn't exceed buffer |
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compressor.Get (buf, size); |
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m->len += DATABASE_STORE_HEADER_SIZE + 2 + size; // payload size |
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FillI2NPMessageHeader (m, eI2NPDatabaseStore); |
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return m; |
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} |
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I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::LeaseSet * leaseSet, uint32_t replyToken) |
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{ |
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if (!leaseSet) return nullptr; |
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I2NPMessage * m = NewI2NPShortMessage (); |
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uint8_t * payload = m->GetPayload (); |
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memcpy (payload + DATABASE_STORE_KEY_OFFSET, leaseSet->GetIdentHash (), 32); |
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payload[DATABASE_STORE_TYPE_OFFSET] = 1; // LeaseSet |
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htobe32buf (payload + DATABASE_STORE_REPLY_TOKEN_OFFSET, replyToken); |
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size_t size = DATABASE_STORE_HEADER_SIZE; |
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if (replyToken) |
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{ |
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auto leases = leaseSet->GetNonExpiredLeases (); |
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if (leases.size () > 0) |
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{ |
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htobe32buf (payload + size, leases[0].tunnelID); |
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size += 4; // reply tunnelID |
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memcpy (payload + size, leases[0].tunnelGateway, 32); |
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size += 32; // reply tunnel gateway |
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} |
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else |
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htobe32buf (payload + DATABASE_STORE_REPLY_TOKEN_OFFSET, 0); |
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} |
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memcpy (payload + size, leaseSet->GetBuffer (), leaseSet->GetBufferLen ()); |
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size += leaseSet->GetBufferLen (); |
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m->len += size; |
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FillI2NPMessageHeader (m, eI2NPDatabaseStore); |
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return m; |
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} |
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I2NPBuildRequestRecordClearText CreateBuildRequestRecord ( |
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const uint8_t * ourIdent, uint32_t receiveTunnelID, |
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const uint8_t * nextIdent, uint32_t nextTunnelID, |
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const uint8_t * layerKey,const uint8_t * ivKey, |
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const uint8_t * replyKey, const uint8_t * replyIV, uint32_t nextMessageID, |
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bool isGateway, bool isEndpoint) |
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{ |
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I2NPBuildRequestRecordClearText clearText; |
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clearText.receiveTunnel = htobe32 (receiveTunnelID); |
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clearText.nextTunnel = htobe32(nextTunnelID); |
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memcpy (clearText.layerKey, layerKey, 32); |
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memcpy (clearText.ivKey, ivKey, 32); |
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memcpy (clearText.replyKey, replyKey, 32); |
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memcpy (clearText.replyIV, replyIV, 16); |
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clearText.flag = 0; |
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if (isGateway) clearText.flag |= 0x80; |
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if (isEndpoint) clearText.flag |= 0x40; |
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memcpy (clearText.ourIdent, ourIdent, 32); |
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memcpy (clearText.nextIdent, nextIdent, 32); |
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clearText.requestTime = htobe32 (i2p::util::GetHoursSinceEpoch ()); |
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clearText.nextMessageID = htobe32(nextMessageID); |
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return clearText; |
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} |
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void EncryptBuildRequestRecord (const i2p::data::RouterInfo& router, |
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const I2NPBuildRequestRecordClearText& clearText, uint8_t * record) |
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{ |
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router.GetElGamalEncryption ()->Encrypt ((uint8_t *)&clearText, sizeof(clearText), record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET); |
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memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)router.GetIdentHash (), 16); |
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} |
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bool HandleBuildRequestRecords (int num, uint8_t * records, I2NPBuildRequestRecordClearText& clearText) |
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{ |
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for (int i = 0; i < num; i++) |
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{ |
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uint8_t * record = records + i*TUNNEL_BUILD_RECORD_SIZE; |
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if (!memcmp (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)i2p::context.GetRouterInfo ().GetIdentHash (), 16)) |
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{ |
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LogPrint ("Record ",i," is ours"); |
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i2p::crypto::ElGamalDecrypt (i2p::context.GetEncryptionPrivateKey (), record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, (uint8_t *)&clearText); |
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// replace record to reply |
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if (i2p::context.AcceptsTunnels ()) |
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{ |
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i2p::tunnel::TransitTunnel * transitTunnel = |
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i2p::tunnel::CreateTransitTunnel ( |
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be32toh (clearText.receiveTunnel), |
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clearText.nextIdent, be32toh (clearText.nextTunnel), |
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clearText.layerKey, clearText.ivKey, |
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clearText.flag & 0x80, clearText.flag & 0x40); |
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i2p::tunnel::tunnels.AddTransitTunnel (transitTunnel); |
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record[BUILD_RESPONSE_RECORD_RET_OFFSET] = 0; |
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} |
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else |
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record[BUILD_RESPONSE_RECORD_RET_OFFSET] = 30; // always reject with bandwidth reason (30) |
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//TODO: fill filler |
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CryptoPP::SHA256().CalculateDigest(record + BUILD_RESPONSE_RECORD_HASH_OFFSET, |
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record + BUILD_RESPONSE_RECORD_PADDING_OFFSET, BUILD_RESPONSE_RECORD_PADDING_SIZE + 1); // + 1 byte of ret |
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// encrypt reply |
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i2p::crypto::CBCEncryption encryption; |
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for (int j = 0; j < num; j++) |
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{ |
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encryption.SetKey (clearText.replyKey); |
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encryption.SetIV (clearText.replyIV); |
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uint8_t * reply = records + j*TUNNEL_BUILD_RECORD_SIZE; |
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encryption.Encrypt(reply, TUNNEL_BUILD_RECORD_SIZE, reply); |
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} |
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return true; |
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} |
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} |
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return false; |
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} |
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void HandleVariableTunnelBuildMsg (uint32_t replyMsgID, uint8_t * buf, size_t len) |
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{ |
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int num = buf[0]; |
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LogPrint ("VariableTunnelBuild ", num, " records"); |
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i2p::tunnel::Tunnel * tunnel = i2p::tunnel::tunnels.GetPendingTunnel (replyMsgID); |
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if (tunnel) |
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{ |
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// endpoint of inbound tunnel |
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LogPrint ("VariableTunnelBuild reply for tunnel ", tunnel->GetTunnelID ()); |
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if (tunnel->HandleTunnelBuildResponse (buf, len)) |
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{ |
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LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been created"); |
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tunnel->SetState (i2p::tunnel::eTunnelStateEstablished); |
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i2p::tunnel::tunnels.AddInboundTunnel (static_cast<i2p::tunnel::InboundTunnel *>(tunnel)); |
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} |
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else |
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{ |
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LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been declined"); |
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tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed); |
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} |
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} |
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else |
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{ |
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I2NPBuildRequestRecordClearText clearText; |
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if (HandleBuildRequestRecords (num, buf + 1, clearText)) |
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{ |
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if (clearText.flag & 0x40) // we are endpoint of outboud tunnel |
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{ |
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// so we send it to reply tunnel |
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transports.SendMessage (clearText.nextIdent, |
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CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel), |
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eI2NPVariableTunnelBuildReply, buf, len, |
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be32toh (clearText.nextMessageID))); |
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} |
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else |
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transports.SendMessage (clearText.nextIdent, |
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CreateI2NPMessage (eI2NPVariableTunnelBuild, buf, len, be32toh (clearText.nextMessageID))); |
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} |
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} |
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} |
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void HandleTunnelBuildMsg (uint8_t * buf, size_t len) |
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{ |
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I2NPBuildRequestRecordClearText clearText; |
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if (HandleBuildRequestRecords (NUM_TUNNEL_BUILD_RECORDS, buf, clearText)) |
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{ |
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if (clearText.flag & 0x40) // we are endpoint of outbound tunnel |
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{ |
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// so we send it to reply tunnel |
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transports.SendMessage (clearText.nextIdent, |
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CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel), |
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eI2NPTunnelBuildReply, buf, len, |
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be32toh (clearText.nextMessageID))); |
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} |
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else |
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transports.SendMessage (clearText.nextIdent, |
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CreateI2NPMessage (eI2NPTunnelBuild, buf, len, be32toh (clearText.nextMessageID))); |
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} |
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} |
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void HandleVariableTunnelBuildReplyMsg (uint32_t replyMsgID, uint8_t * buf, size_t len) |
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{ |
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LogPrint ("VariableTunnelBuildReplyMsg replyMsgID=", replyMsgID); |
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i2p::tunnel::Tunnel * tunnel = i2p::tunnel::tunnels.GetPendingTunnel (replyMsgID); |
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if (tunnel) |
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{ |
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// reply for outbound tunnel |
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if (tunnel->HandleTunnelBuildResponse (buf, len)) |
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{ |
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LogPrint ("Outbound tunnel ", tunnel->GetTunnelID (), " has been created"); |
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tunnel->SetState (i2p::tunnel::eTunnelStateEstablished); |
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i2p::tunnel::tunnels.AddOutboundTunnel (static_cast<i2p::tunnel::OutboundTunnel *>(tunnel)); |
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} |
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else |
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{ |
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LogPrint ("Outbound tunnel ", tunnel->GetTunnelID (), " has been declined"); |
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tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed); |
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} |
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} |
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else |
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LogPrint ("Pending tunnel for message ", replyMsgID, " not found"); |
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} |
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I2NPMessage * CreateTunnelDataMsg (const uint8_t * buf) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (); |
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memcpy (msg->GetPayload (), buf, i2p::tunnel::TUNNEL_DATA_MSG_SIZE); |
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msg->len += i2p::tunnel::TUNNEL_DATA_MSG_SIZE; |
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FillI2NPMessageHeader (msg, eI2NPTunnelData); |
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return msg; |
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} |
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I2NPMessage * CreateTunnelDataMsg (uint32_t tunnelID, const uint8_t * payload) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (); |
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memcpy (msg->GetPayload () + 4, payload, i2p::tunnel::TUNNEL_DATA_MSG_SIZE - 4); |
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htobe32buf (msg->GetPayload (), tunnelID); |
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msg->len += i2p::tunnel::TUNNEL_DATA_MSG_SIZE; |
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FillI2NPMessageHeader (msg, eI2NPTunnelData); |
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return msg; |
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} |
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I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, const uint8_t * buf, size_t len) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (len); |
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uint8_t * payload = msg->GetPayload (); |
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htobe32buf (payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET, tunnelID); |
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htobe16buf (payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET, len); |
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memcpy (payload + TUNNEL_GATEWAY_HEADER_SIZE, buf, len); |
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msg->len += TUNNEL_GATEWAY_HEADER_SIZE + len; |
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FillI2NPMessageHeader (msg, eI2NPTunnelGateway); |
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return msg; |
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} |
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I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessage * msg) |
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{ |
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if (msg->offset >= I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE) |
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{ |
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// message is capable to be used without copying |
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uint8_t * payload = msg->GetBuffer () - TUNNEL_GATEWAY_HEADER_SIZE; |
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htobe32buf (payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET, tunnelID); |
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int len = msg->GetLength (); |
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htobe16buf (payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET, len); |
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msg->offset -= (I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE); |
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msg->len = msg->offset + I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE +len; |
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FillI2NPMessageHeader (msg, eI2NPTunnelGateway); |
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return msg; |
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} |
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else |
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{ |
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I2NPMessage * msg1 = CreateTunnelGatewayMsg (tunnelID, msg->GetBuffer (), msg->GetLength ()); |
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DeleteI2NPMessage (msg); |
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return msg1; |
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} |
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} |
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I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessageType msgType, |
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const uint8_t * buf, size_t len, uint32_t replyMsgID) |
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{ |
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I2NPMessage * msg = NewI2NPMessage (len); |
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size_t gatewayMsgOffset = I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE; |
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msg->offset += gatewayMsgOffset; |
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msg->len += gatewayMsgOffset; |
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memcpy (msg->GetPayload (), buf, len); |
|
msg->len += len; |
|
FillI2NPMessageHeader (msg, msgType, replyMsgID); // create content message |
|
len = msg->GetLength (); |
|
msg->offset -= gatewayMsgOffset; |
|
uint8_t * payload = msg->GetPayload (); |
|
htobe32buf (payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET, tunnelID); |
|
htobe16buf (payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET, len); |
|
FillI2NPMessageHeader (msg, eI2NPTunnelGateway); // gateway message |
|
return msg; |
|
} |
|
|
|
void HandleTunnelGatewayMsg (I2NPMessage * msg) |
|
{ |
|
const uint8_t * payload = msg->GetPayload (); |
|
uint32_t tunnelID = bufbe32toh(payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET); |
|
uint16_t len = bufbe16toh(payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET); |
|
// we make payload as new I2NP message to send |
|
msg->offset += I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE; |
|
msg->len = msg->offset + len; |
|
auto typeID = msg->GetTypeID (); |
|
LogPrint ("TunnelGateway of ", (int)len, " bytes for tunnel ", (unsigned int)tunnelID, ". Msg type ", (int)typeID); |
|
|
|
if (typeID == eI2NPDatabaseStore || typeID == eI2NPDatabaseSearchReply) |
|
{ |
|
// transit DatabaseStore my contain new/updated RI |
|
// or DatabaseSearchReply with new routers |
|
auto ds = NewI2NPMessage (); |
|
*ds = *msg; |
|
i2p::data::netdb.PostI2NPMsg (ds); |
|
} |
|
i2p::tunnel::TransitTunnel * tunnel = i2p::tunnel::tunnels.GetTransitTunnel (tunnelID); |
|
if (tunnel) |
|
tunnel->SendTunnelDataMsg (msg); |
|
else |
|
{ |
|
LogPrint ("Tunnel ", (unsigned int)tunnelID, " not found"); |
|
i2p::DeleteI2NPMessage (msg); |
|
} |
|
} |
|
|
|
size_t GetI2NPMessageLength (const uint8_t * msg) |
|
{ |
|
return bufbe16toh (msg + I2NP_HEADER_SIZE_OFFSET) + I2NP_HEADER_SIZE; |
|
} |
|
|
|
void HandleI2NPMessage (uint8_t * msg, size_t len) |
|
{ |
|
uint8_t typeID = msg[I2NP_HEADER_TYPEID_OFFSET]; |
|
uint32_t msgID = bufbe32toh (msg + I2NP_HEADER_MSGID_OFFSET); |
|
LogPrint ("I2NP msg received len=", len,", type=", (int)typeID, ", msgID=", (unsigned int)msgID); |
|
|
|
uint8_t * buf = msg + I2NP_HEADER_SIZE; |
|
int size = bufbe16toh (msg + I2NP_HEADER_SIZE_OFFSET); |
|
switch (typeID) |
|
{ |
|
case eI2NPVariableTunnelBuild: |
|
LogPrint ("VariableTunnelBuild"); |
|
HandleVariableTunnelBuildMsg (msgID, buf, size); |
|
break; |
|
case eI2NPVariableTunnelBuildReply: |
|
LogPrint ("VariableTunnelBuildReply"); |
|
HandleVariableTunnelBuildReplyMsg (msgID, buf, size); |
|
break; |
|
case eI2NPTunnelBuild: |
|
LogPrint ("TunnelBuild"); |
|
HandleTunnelBuildMsg (buf, size); |
|
break; |
|
case eI2NPTunnelBuildReply: |
|
LogPrint ("TunnelBuildReply"); |
|
// TODO: |
|
break; |
|
default: |
|
LogPrint ("Unexpected message ", (int)typeID); |
|
} |
|
} |
|
|
|
void HandleI2NPMessage (I2NPMessage * msg) |
|
{ |
|
if (msg) |
|
{ |
|
switch (msg->GetTypeID ()) |
|
{ |
|
case eI2NPTunnelData: |
|
LogPrint ("TunnelData"); |
|
i2p::tunnel::tunnels.PostTunnelData (msg); |
|
break; |
|
case eI2NPTunnelGateway: |
|
LogPrint ("TunnelGateway"); |
|
HandleTunnelGatewayMsg (msg); |
|
break; |
|
case eI2NPGarlic: |
|
LogPrint ("Garlic"); |
|
if (msg->from) |
|
{ |
|
if (msg->from->GetTunnelPool ()) |
|
msg->from->GetTunnelPool ()->ProcessGarlicMessage (msg); |
|
else |
|
{ |
|
LogPrint (eLogInfo, "Local destination for garlic doesn't exist anymore"); |
|
DeleteI2NPMessage (msg); |
|
} |
|
} |
|
else |
|
i2p::context.ProcessGarlicMessage (msg); |
|
break; |
|
case eI2NPDatabaseStore: |
|
case eI2NPDatabaseSearchReply: |
|
case eI2NPDatabaseLookup: |
|
// forward to netDb |
|
i2p::data::netdb.PostI2NPMsg (msg); |
|
break; |
|
case eI2NPDeliveryStatus: |
|
LogPrint ("DeliveryStatus"); |
|
if (msg->from && msg->from->GetTunnelPool ()) |
|
msg->from->GetTunnelPool ()->ProcessDeliveryStatus (msg); |
|
else |
|
i2p::context.ProcessDeliveryStatusMessage (msg); |
|
break; |
|
default: |
|
HandleI2NPMessage (msg->GetBuffer (), msg->GetLength ()); |
|
DeleteI2NPMessage (msg); |
|
} |
|
} |
|
} |
|
}
|
|
|