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This commit is contained in:
Adam Ierymenko 2013-09-25 10:55:27 -04:00
parent 5557a8192d
commit f3128a18fe
12 changed files with 218 additions and 138 deletions
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22
node/PacketDecoder.hpp
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@ -38,6 +38,22 @@
#include "AtomicCounter.hpp"
#include "Peer.hpp"
/*
* The big picture:
*
* tryDecode gets called for a given fully-assembled packet until it returns
* true or the packet's time to live has been exceeded, in which case it is
* discarded as failed decode. Any exception thrown by tryDecode also causes
* the packet to be discarded.
*
* Thus a return of false from tryDecode() indicates that it should be called
* again. Logic is very simple as to when, and it's in doAnythingWaitingForPeer
* in Switch. This might be expanded to be more fine grained in the future.
*
* A return value of true indicates that the packet is done. tryDecode must
* never be called again after that.
*/
namespace ZeroTier {
class RuntimeEnvironment;
@ -76,7 +92,8 @@ public:
* Note that this returns 'true' if processing is complete. This says nothing
* about whether the packet was valid. A rejection is 'complete.'
*
* Once true is returned, this should not be called again.
* Once true is returned, this must not be called again. The packet's state
* may no longer be valid.
*
* @param _r Runtime environment
* @return True if decoding and processing is complete, false if caller should try again
@ -87,7 +104,7 @@ public:
throw(std::out_of_range,std::runtime_error);
/**
* @return Time of packet receipt
* @return Time of packet receipt / start of decode
*/
inline uint64_t receiveTime() const throw() { return _receiveTime; }
@ -121,6 +138,7 @@ private:
bool _doRENDEZVOUS(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doFRAME(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doMULTICAST_LIKE(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doMULTICAST_GOT(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doMULTICAST_FRAME(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doNETWORK_MEMBERSHIP_CERTIFICATE(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);
bool _doNETWORK_CONFIG_REQUEST(const RuntimeEnvironment *_r,const SharedPtr<Peer> &peer);