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Code Issues Releases Activity

check for I2NP message buffer boudary

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orignal 2015-05-11 12:53:08 -04:00
parent 8baab2de37
commit 5cd557ef9d
1 changed files with 15 additions and 5 deletions
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20
I2NPProtocol.cpp
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@ -65,8 +65,13 @@ namespace i2p
I2NPMessage * CreateI2NPMessage (I2NPMessageType msgType, const uint8_t * buf, int len, uint32_t replyMsgID) I2NPMessage * CreateI2NPMessage (I2NPMessageType msgType, const uint8_t * buf, int len, uint32_t replyMsgID)
{ {
I2NPMessage * msg = NewI2NPMessage (len); I2NPMessage * msg = NewI2NPMessage (len);
memcpy (msg->GetPayload (), buf, len); if (msg->len + len < msg->maxLen)
msg->len += len; {
memcpy (msg->GetPayload (), buf, len);
msg->len += len;
}
else
LogPrint (eLogError, "I2NP message length ", len, " exceeds max length");
FillI2NPMessageHeader (msg, msgType, replyMsgID); FillI2NPMessageHeader (msg, msgType, replyMsgID);
return msg; return msg;
} }
@ -74,9 +79,14 @@ namespace i2p
I2NPMessage * CreateI2NPMessage (const uint8_t * buf, int len, std::shared_ptr<i2p::tunnel::InboundTunnel> from) I2NPMessage * CreateI2NPMessage (const uint8_t * buf, int len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
{ {
I2NPMessage * msg = NewI2NPMessage (); I2NPMessage * msg = NewI2NPMessage ();
memcpy (msg->GetBuffer (), buf, len); if (msg->offset + len < msg->maxLen)
msg->len = msg->offset + len; {
msg->from = from; memcpy (msg->GetBuffer (), buf, len);
msg->len = msg->offset + len;
msg->from = from;
}
else
LogPrint (eLogError, "I2NP message length ", len, " exceeds max length");
return msg; return msg;
} }