mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
597 lines
19 KiB
597 lines
19 KiB
#include <string.h> |
|
#include <atomic> |
|
#include "I2PEndian.h" |
|
#include <cryptopp/sha.h> |
|
#include <cryptopp/gzip.h> |
|
#include "ElGamal.h" |
|
#include "Timestamp.h" |
|
#include "RouterContext.h" |
|
#include "NetDb.h" |
|
#include "Tunnel.h" |
|
#include "base64.h" |
|
#include "Transports.h" |
|
#include "Garlic.h" |
|
#include "I2NPProtocol.h" |
|
|
|
using namespace i2p::transport; |
|
|
|
namespace i2p |
|
{ |
|
I2NPMessage * NewI2NPMessage () |
|
{ |
|
return new I2NPMessageBuffer<I2NP_MAX_MESSAGE_SIZE>(); |
|
} |
|
|
|
I2NPMessage * NewI2NPShortMessage () |
|
{ |
|
return new I2NPMessageBuffer<I2NP_MAX_SHORT_MESSAGE_SIZE>(); |
|
} |
|
|
|
I2NPMessage * NewI2NPMessage (size_t len) |
|
{ |
|
return (len < I2NP_MAX_SHORT_MESSAGE_SIZE/2) ? NewI2NPShortMessage () : NewI2NPMessage (); |
|
} |
|
|
|
void DeleteI2NPMessage (I2NPMessage * msg) |
|
{ |
|
delete msg; |
|
} |
|
|
|
static std::atomic<uint32_t> I2NPmsgID(0); // TODO: create class |
|
void FillI2NPMessageHeader (I2NPMessage * msg, I2NPMessageType msgType, uint32_t replyMsgID) |
|
{ |
|
I2NPHeader * header = msg->GetHeader (); |
|
header->typeID = msgType; |
|
if (replyMsgID) // for tunnel creation |
|
header->msgID = htobe32 (replyMsgID); |
|
else |
|
{ |
|
header->msgID = htobe32 (I2NPmsgID); |
|
I2NPmsgID++; |
|
} |
|
header->expiration = htobe64 (i2p::util::GetMillisecondsSinceEpoch () + 5000); // TODO: 5 secs is a magic number |
|
int len = msg->GetLength () - sizeof (I2NPHeader); |
|
header->size = htobe16 (len); |
|
uint8_t hash[32]; |
|
CryptoPP::SHA256().CalculateDigest(hash, msg->GetPayload (), len); |
|
header->chks = hash[0]; |
|
} |
|
|
|
void RenewI2NPMessageHeader (I2NPMessage * msg) |
|
{ |
|
if (msg) |
|
{ |
|
I2NPHeader * header = msg->GetHeader (); |
|
header->msgID = htobe32 (I2NPmsgID); |
|
I2NPmsgID++; |
|
header->expiration = htobe64 (i2p::util::GetMillisecondsSinceEpoch () + 5000); |
|
} |
|
} |
|
|
|
I2NPMessage * CreateI2NPMessage (I2NPMessageType msgType, const uint8_t * buf, int len, uint32_t replyMsgID) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (len); |
|
memcpy (msg->GetPayload (), buf, len); |
|
msg->len += len; |
|
FillI2NPMessageHeader (msg, msgType, replyMsgID); |
|
return msg; |
|
} |
|
|
|
I2NPMessage * CreateI2NPMessage (const uint8_t * buf, int len, i2p::tunnel::InboundTunnel * from) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (); |
|
memcpy (msg->GetBuffer (), buf, len); |
|
msg->len = msg->offset + len; |
|
msg->from = from; |
|
return msg; |
|
} |
|
|
|
I2NPMessage * CreateDeliveryStatusMsg (uint32_t msgID) |
|
{ |
|
I2NPDeliveryStatusMsg msg; |
|
if (msgID) |
|
{ |
|
msg.msgID = htobe32 (msgID); |
|
msg.timestamp = htobe64 (i2p::util::GetMillisecondsSinceEpoch ()); |
|
} |
|
else // for SSU establishment |
|
{ |
|
msg.msgID = htobe32 (i2p::context.GetRandomNumberGenerator ().GenerateWord32 ()); |
|
msg.timestamp = htobe64 (2); // netID = 2 |
|
} |
|
return CreateI2NPMessage (eI2NPDeliveryStatus, (uint8_t *)&msg, sizeof (msg)); |
|
} |
|
|
|
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 * m = NewI2NPMessage (); |
|
uint8_t * buf = m->GetPayload (); |
|
memcpy (buf, key, 32); // key |
|
buf += 32; |
|
memcpy (buf, from, 32); // from |
|
buf += 32; |
|
if (replyTunnelID) |
|
{ |
|
*buf = encryption ? 0x03: 0x01; // set delivery flag |
|
*(uint32_t *)(buf+1) = htobe32 (replyTunnelID); |
|
buf += 5; |
|
} |
|
else |
|
{ |
|
encryption = false; // encryption can we set for tunnels only |
|
*buf = 0; // flag |
|
buf++; |
|
} |
|
|
|
if (exploratory) |
|
{ |
|
*(uint16_t *)buf = htobe16 (1); // one exlude record |
|
buf += 2; |
|
// reply with non-floodfill routers only |
|
memset (buf, 0, 32); |
|
buf += 32; |
|
} |
|
else |
|
{ |
|
if (excludedPeers) |
|
{ |
|
int cnt = excludedPeers->size (); |
|
*(uint16_t *)buf = htobe16 (cnt); |
|
buf += 2; |
|
for (auto& it: *excludedPeers) |
|
{ |
|
memcpy (buf, it, 32); |
|
buf += 32; |
|
} |
|
} |
|
else |
|
{ |
|
// nothing to exclude |
|
*(uint16_t *)buf = htobe16 (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; |
|
} |
|
m->len += (buf - m->GetPayload ()); |
|
FillI2NPMessageHeader (m, eI2NPDatabaseLookup); |
|
return m; |
|
} |
|
|
|
I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, |
|
const i2p::data::RouterInfo * floodfill) |
|
{ |
|
I2NPMessage * m = NewI2NPShortMessage (); |
|
uint8_t * buf = m->GetPayload (); |
|
size_t len = 0; |
|
memcpy (buf, ident, 32); |
|
len += 32; |
|
buf[len] = floodfill ? 1 : 0; // 1 router for now |
|
len++; |
|
if (floodfill) |
|
{ |
|
memcpy (buf + len, floodfill->GetIdentHash (), 32); |
|
len += 32; |
|
} |
|
memcpy (buf + len, i2p::context.GetRouterInfo ().GetIdentHash (), 32); |
|
len += 32; |
|
m->len += len; |
|
FillI2NPMessageHeader (m, eI2NPDatabaseSearchReply); |
|
return m; |
|
} |
|
|
|
I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::RouterInfo * router) |
|
{ |
|
if (!router) // we send own RouterInfo |
|
router = &context.GetRouterInfo (); |
|
|
|
I2NPMessage * m = NewI2NPShortMessage (); |
|
I2NPDatabaseStoreMsg * msg = (I2NPDatabaseStoreMsg *)m->GetPayload (); |
|
|
|
memcpy (msg->key, router->GetIdentHash (), 32); |
|
msg->type = 0; |
|
msg->replyToken = 0; |
|
|
|
CryptoPP::Gzip compressor; |
|
compressor.Put (router->GetBuffer (), router->GetBufferLen ()); |
|
compressor.MessageEnd(); |
|
auto size = compressor.MaxRetrievable (); |
|
uint8_t * buf = m->GetPayload () + sizeof (I2NPDatabaseStoreMsg); |
|
*(uint16_t *)buf = htobe16 (size); // size |
|
buf += 2; |
|
// TODO: check if size doesn't exceed buffer |
|
compressor.Get (buf, size); |
|
m->len += sizeof (I2NPDatabaseStoreMsg) + 2 + size; // payload size |
|
FillI2NPMessageHeader (m, eI2NPDatabaseStore); |
|
|
|
return m; |
|
} |
|
|
|
I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::LeaseSet * leaseSet, uint32_t replyToken) |
|
{ |
|
if (!leaseSet) return nullptr; |
|
I2NPMessage * m = NewI2NPShortMessage (); |
|
uint8_t * payload = m->GetPayload (); |
|
I2NPDatabaseStoreMsg * msg = (I2NPDatabaseStoreMsg *)payload; |
|
memcpy (msg->key, leaseSet->GetIdentHash (), 32); |
|
msg->type = 1; // LeaseSet |
|
msg->replyToken = htobe32 (replyToken); |
|
size_t size = sizeof (I2NPDatabaseStoreMsg); |
|
if (replyToken) |
|
{ |
|
auto leases = leaseSet->GetNonExpiredLeases (); |
|
if (leases.size () > 0) |
|
{ |
|
*(uint32_t *)(payload + size) = htobe32 (leases[0].tunnelID); |
|
size += 4; // reply tunnelID |
|
memcpy (payload + size, leases[0].tunnelGateway, 32); |
|
size += 32; // reply tunnel gateway |
|
} |
|
else |
|
msg->replyToken = 0; |
|
} |
|
memcpy (payload + size, leaseSet->GetBuffer (), leaseSet->GetBufferLen ()); |
|
size += leaseSet->GetBufferLen (); |
|
m->len += size; |
|
FillI2NPMessageHeader (m, eI2NPDatabaseStore); |
|
return m; |
|
} |
|
|
|
I2NPBuildRequestRecordClearText CreateBuildRequestRecord ( |
|
const uint8_t * ourIdent, uint32_t receiveTunnelID, |
|
const uint8_t * nextIdent, uint32_t nextTunnelID, |
|
const uint8_t * layerKey,const uint8_t * ivKey, |
|
const uint8_t * replyKey, const uint8_t * replyIV, uint32_t nextMessageID, |
|
bool isGateway, bool isEndpoint) |
|
{ |
|
I2NPBuildRequestRecordClearText clearText; |
|
clearText.receiveTunnel = htobe32 (receiveTunnelID); |
|
clearText.nextTunnel = htobe32(nextTunnelID); |
|
memcpy (clearText.layerKey, layerKey, 32); |
|
memcpy (clearText.ivKey, ivKey, 32); |
|
memcpy (clearText.replyKey, replyKey, 32); |
|
memcpy (clearText.replyIV, replyIV, 16); |
|
clearText.flag = 0; |
|
if (isGateway) clearText.flag |= 0x80; |
|
if (isEndpoint) clearText.flag |= 0x40; |
|
memcpy (clearText.ourIdent, ourIdent, 32); |
|
memcpy (clearText.nextIdent, nextIdent, 32); |
|
clearText.requestTime = htobe32 (i2p::util::GetHoursSinceEpoch ()); |
|
clearText.nextMessageID = htobe32(nextMessageID); |
|
return clearText; |
|
} |
|
|
|
void EncryptBuildRequestRecord (const i2p::data::RouterInfo& router, |
|
const I2NPBuildRequestRecordClearText& clearText, |
|
I2NPBuildRequestRecordElGamalEncrypted& record) |
|
{ |
|
router.GetElGamalEncryption ()->Encrypt ((uint8_t *)&clearText, sizeof(clearText), record.encrypted); |
|
memcpy (record.toPeer, (const uint8_t *)router.GetIdentHash (), 16); |
|
} |
|
|
|
bool HandleBuildRequestRecords (int num, I2NPBuildRequestRecordElGamalEncrypted * records, I2NPBuildRequestRecordClearText& clearText) |
|
{ |
|
for (int i = 0; i < num; i++) |
|
{ |
|
if (!memcmp (records[i].toPeer, (const uint8_t *)i2p::context.GetRouterInfo ().GetIdentHash (), 16)) |
|
{ |
|
LogPrint ("Record ",i," is ours"); |
|
|
|
i2p::crypto::ElGamalDecrypt (i2p::context.GetEncryptionPrivateKey (), records[i].encrypted, (uint8_t *)&clearText); |
|
// replace record to reply |
|
I2NPBuildResponseRecord * reply = (I2NPBuildResponseRecord *)(records + i); |
|
if (i2p::context.AcceptsTunnels ()) |
|
{ |
|
i2p::tunnel::TransitTunnel * transitTunnel = |
|
i2p::tunnel::CreateTransitTunnel ( |
|
be32toh (clearText.receiveTunnel), |
|
clearText.nextIdent, be32toh (clearText.nextTunnel), |
|
clearText.layerKey, clearText.ivKey, |
|
clearText.flag & 0x80, clearText.flag & 0x40); |
|
i2p::tunnel::tunnels.AddTransitTunnel (transitTunnel); |
|
reply->ret = 0; |
|
} |
|
else |
|
reply->ret = 30; // always reject with bandwidth reason (30) |
|
|
|
//TODO: fill filler |
|
CryptoPP::SHA256().CalculateDigest(reply->hash, reply->padding, sizeof (reply->padding) + 1); // + 1 byte of ret |
|
// encrypt reply |
|
i2p::crypto::CBCEncryption encryption; |
|
for (int j = 0; j < num; j++) |
|
{ |
|
encryption.SetKey (clearText.replyKey); |
|
encryption.SetIV (clearText.replyIV); |
|
encryption.Encrypt((uint8_t *)(records + j), sizeof (records[j]), (uint8_t *)(records + j)); |
|
} |
|
return true; |
|
} |
|
} |
|
return false; |
|
} |
|
|
|
void HandleVariableTunnelBuildMsg (uint32_t replyMsgID, uint8_t * buf, size_t len) |
|
{ |
|
int num = buf[0]; |
|
LogPrint ("VariableTunnelBuild ", num, " records"); |
|
|
|
i2p::tunnel::Tunnel * tunnel = i2p::tunnel::tunnels.GetPendingTunnel (replyMsgID); |
|
if (tunnel) |
|
{ |
|
// endpoint of inbound tunnel |
|
LogPrint ("VariableTunnelBuild reply for tunnel ", tunnel->GetTunnelID ()); |
|
if (tunnel->HandleTunnelBuildResponse (buf, len)) |
|
{ |
|
LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been created"); |
|
tunnel->SetState (i2p::tunnel::eTunnelStateEstablished); |
|
i2p::tunnel::tunnels.AddInboundTunnel (static_cast<i2p::tunnel::InboundTunnel *>(tunnel)); |
|
} |
|
else |
|
{ |
|
LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been declined"); |
|
tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed); |
|
} |
|
} |
|
else |
|
{ |
|
I2NPBuildRequestRecordElGamalEncrypted * records = (I2NPBuildRequestRecordElGamalEncrypted *)(buf+1); |
|
I2NPBuildRequestRecordClearText clearText; |
|
if (HandleBuildRequestRecords (num, records, clearText)) |
|
{ |
|
if (clearText.flag & 0x40) // we are endpoint of outboud tunnel |
|
{ |
|
// so we send it to reply tunnel |
|
transports.SendMessage (clearText.nextIdent, |
|
CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel), |
|
eI2NPVariableTunnelBuildReply, buf, len, |
|
be32toh (clearText.nextMessageID))); |
|
} |
|
else |
|
transports.SendMessage (clearText.nextIdent, |
|
CreateI2NPMessage (eI2NPVariableTunnelBuild, buf, len, be32toh (clearText.nextMessageID))); |
|
} |
|
} |
|
} |
|
|
|
void HandleTunnelBuildMsg (uint8_t * buf, size_t len) |
|
{ |
|
I2NPBuildRequestRecordClearText clearText; |
|
if (HandleBuildRequestRecords (NUM_TUNNEL_BUILD_RECORDS, (I2NPBuildRequestRecordElGamalEncrypted *)buf, clearText)) |
|
{ |
|
if (clearText.flag & 0x40) // we are endpoint of outbound tunnel |
|
{ |
|
// so we send it to reply tunnel |
|
transports.SendMessage (clearText.nextIdent, |
|
CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel), |
|
eI2NPTunnelBuildReply, buf, len, |
|
be32toh (clearText.nextMessageID))); |
|
} |
|
else |
|
transports.SendMessage (clearText.nextIdent, |
|
CreateI2NPMessage (eI2NPTunnelBuild, buf, len, be32toh (clearText.nextMessageID))); |
|
} |
|
} |
|
|
|
void HandleVariableTunnelBuildReplyMsg (uint32_t replyMsgID, uint8_t * buf, size_t len) |
|
{ |
|
LogPrint ("VariableTunnelBuildReplyMsg replyMsgID=", replyMsgID); |
|
i2p::tunnel::Tunnel * tunnel = i2p::tunnel::tunnels.GetPendingTunnel (replyMsgID); |
|
if (tunnel) |
|
{ |
|
// reply for outbound tunnel |
|
if (tunnel->HandleTunnelBuildResponse (buf, len)) |
|
{ |
|
LogPrint ("Outbound tunnel ", tunnel->GetTunnelID (), " has been created"); |
|
tunnel->SetState (i2p::tunnel::eTunnelStateEstablished); |
|
i2p::tunnel::tunnels.AddOutboundTunnel (static_cast<i2p::tunnel::OutboundTunnel *>(tunnel)); |
|
} |
|
else |
|
{ |
|
LogPrint ("Outbound tunnel ", tunnel->GetTunnelID (), " has been declined"); |
|
tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed); |
|
} |
|
} |
|
else |
|
LogPrint ("Pending tunnel for message ", replyMsgID, " not found"); |
|
} |
|
|
|
|
|
I2NPMessage * CreateTunnelDataMsg (const uint8_t * buf) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (); |
|
memcpy (msg->GetPayload (), buf, i2p::tunnel::TUNNEL_DATA_MSG_SIZE); |
|
msg->len += i2p::tunnel::TUNNEL_DATA_MSG_SIZE; |
|
FillI2NPMessageHeader (msg, eI2NPTunnelData); |
|
return msg; |
|
} |
|
|
|
I2NPMessage * CreateTunnelDataMsg (uint32_t tunnelID, const uint8_t * payload) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (); |
|
memcpy (msg->GetPayload () + 4, payload, i2p::tunnel::TUNNEL_DATA_MSG_SIZE - 4); |
|
*(uint32_t *)(msg->GetPayload ()) = htobe32 (tunnelID); |
|
msg->len += i2p::tunnel::TUNNEL_DATA_MSG_SIZE; |
|
FillI2NPMessageHeader (msg, eI2NPTunnelData); |
|
return msg; |
|
} |
|
|
|
I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, const uint8_t * buf, size_t len) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (len); |
|
TunnelGatewayHeader * header = (TunnelGatewayHeader *)msg->GetPayload (); |
|
header->tunnelID = htobe32 (tunnelID); |
|
header->length = htobe16 (len); |
|
memcpy (msg->GetPayload () + sizeof (TunnelGatewayHeader), buf, len); |
|
msg->len += sizeof (TunnelGatewayHeader) + len; |
|
FillI2NPMessageHeader (msg, eI2NPTunnelGateway); |
|
return msg; |
|
} |
|
|
|
I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessage * msg) |
|
{ |
|
if (msg->offset >= sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader)) |
|
{ |
|
// message is capable to be used without copying |
|
TunnelGatewayHeader * header = (TunnelGatewayHeader *)(msg->GetBuffer () - sizeof (TunnelGatewayHeader)); |
|
header->tunnelID = htobe32 (tunnelID); |
|
int len = msg->GetLength (); |
|
header->length = htobe16 (len); |
|
msg->offset -= (sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader)); |
|
msg->len = msg->offset + sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader) +len; |
|
FillI2NPMessageHeader (msg, eI2NPTunnelGateway); |
|
return msg; |
|
} |
|
else |
|
{ |
|
I2NPMessage * msg1 = CreateTunnelGatewayMsg (tunnelID, msg->GetBuffer (), msg->GetLength ()); |
|
DeleteI2NPMessage (msg); |
|
return msg1; |
|
} |
|
} |
|
|
|
I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessageType msgType, |
|
const uint8_t * buf, size_t len, uint32_t replyMsgID) |
|
{ |
|
I2NPMessage * msg = NewI2NPMessage (len); |
|
size_t gatewayMsgOffset = sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader); |
|
msg->offset += gatewayMsgOffset; |
|
msg->len += gatewayMsgOffset; |
|
memcpy (msg->GetPayload (), buf, len); |
|
msg->len += len; |
|
FillI2NPMessageHeader (msg, msgType, replyMsgID); // create content message |
|
len = msg->GetLength (); |
|
msg->offset -= gatewayMsgOffset; |
|
TunnelGatewayHeader * header = (TunnelGatewayHeader *)msg->GetPayload (); |
|
header->tunnelID = htobe32 (tunnelID); |
|
header->length = htobe16 (len); |
|
FillI2NPMessageHeader (msg, eI2NPTunnelGateway); // gateway message |
|
return msg; |
|
} |
|
|
|
void HandleTunnelGatewayMsg (I2NPMessage * msg) |
|
{ |
|
TunnelGatewayHeader * header = (TunnelGatewayHeader *)msg->GetPayload (); |
|
uint32_t tunnelID = be32toh(header->tunnelID); |
|
uint16_t len = be16toh(header->length); |
|
// we make payload as new I2NP message to send |
|
msg->offset += sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader); |
|
msg->len = msg->offset + len; |
|
LogPrint ("TunnelGateway of ", (int)len, " bytes for tunnel ", (unsigned int)tunnelID, ". Msg type ", (int)msg->GetHeader()->typeID); |
|
if (msg->GetHeader()->typeID == eI2NPDatabaseStore || |
|
msg->GetHeader()->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) |
|
{ |
|
I2NPHeader * header = (I2NPHeader *)msg; |
|
return be16toh (header->size) + sizeof (I2NPHeader); |
|
} |
|
|
|
void HandleI2NPMessage (uint8_t * msg, size_t len) |
|
{ |
|
I2NPHeader * header = (I2NPHeader *)msg; |
|
uint32_t msgID = be32toh (header->msgID); |
|
LogPrint ("I2NP msg received len=", len,", type=", (int)header->typeID, ", msgID=", (unsigned int)msgID); |
|
|
|
uint8_t * buf = msg + sizeof (I2NPHeader); |
|
int size = be16toh (header->size); |
|
switch (header->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)header->typeID); |
|
} |
|
} |
|
|
|
void HandleI2NPMessage (I2NPMessage * msg) |
|
{ |
|
if (msg) |
|
{ |
|
switch (msg->GetHeader ()->typeID) |
|
{ |
|
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); |
|
} |
|
} |
|
} |
|
}
|
|
|