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resend

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orignal 2014-07-20 10:38:39 -04:00
parent 541a49c359
commit d7bcaaa3f7
2 changed files with 78 additions and 22 deletions
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21
SSUData.h
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@ -6,6 +6,7 @@
#include <map>
#include <vector>
#include <set>
#include <boost/asio.hpp>
#include "I2NPProtocol.h"
namespace i2p
@ -14,6 +15,8 @@ namespace ssu
{
const size_t SSU_MTU = 1484;
const int RESEND_INTERVAL = 3; // in seconds
const int MAX_NUM_RESENDS = 5;
// data flags
const uint8_t DATA_FLAG_EXTENDED_DATA_INCLUDED = 0x02;
const uint8_t DATA_FLAG_WANT_REPLY = 0x04;
@ -24,10 +27,12 @@ namespace ssu
struct Fragment
{
int fragmentNum, len;
int fragmentNum;
size_t len;
bool isLast;
uint8_t buf[SSU_MTU];
uint8_t buf[SSU_MTU + 18];
Fragment () = default;
Fragment (int n, const uint8_t * b, int l, bool last):
fragmentNum (n), len (l), isLast (last) { memcpy (buf, b, len); };
};
@ -52,9 +57,11 @@ namespace ssu
struct SentMessage
{
std::vector<uint8_t *> fragments;
std::vector<Fragment *> fragments;
uint32_t nextResendTime; // in seconds
int numResends;
~SentMessage () { for (auto it: fragments) { delete it; }; };
};
class SSUSession;
@ -76,13 +83,15 @@ namespace ssu
void ProcessFragments (uint8_t * buf);
void ProcessSentMessageAck (uint32_t msgID);
private:
void ScheduleResend ();
void HandleResendTimer (const boost::system::error_code& ecode);
private:
SSUSession& m_Session;
std::map<uint32_t, IncompleteMessage *> m_IncomleteMessages;
std::map<uint32_t, SentMessage> m_SentMessages; // msgID -> fragments
std::map<uint32_t, SentMessage *> m_SentMessages;
boost::asio::deadline_timer m_ResendTimer;
};
}
}