1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
#pragma once
#include <erebos/identity.h>
#include <erebos/network.h>
#include <erebos/service.h>
#include <future>
#include <map>
#include <mutex>
#include <string>
#include <variant>
#include <vector>
namespace erebos {
using std::function;
using std::future;
using std::map;
using std::mutex;
using std::string;
using std::variant;
using std::vector;
/**
* Template-less base class for the paring functionality that does not depend
* on the result parameter.
*/
class PairingServiceBase : public Service
{
public:
typedef function<void(const Peer &)> RequestInitHook;
void onRequestInit(RequestInitHook);
typedef function<future<bool>(const Peer &, string)> ConfirmHook;
void onResponse(ConfirmHook);
void onRequest(ConfirmHook);
typedef function<void(const Peer &)> RequestNonceFailedHook;
void onRequestNonceFailed(RequestNonceFailedHook);
protected:
void requestPairing(UUID serviceId, const Peer & peer);
virtual void handle(Context &) override;
virtual Ref handlePairingCompleteRef(const Peer &) = 0;
virtual void handlePairingResult(Context &) = 0;
private:
static vector<uint8_t> nonceDigest(const Identity & id1, const Identity & id2,
const vector<uint8_t> & nonce1, const vector<uint8_t> & nonce2);
static string confirmationNumber(const vector<uint8_t> &);
void waitForConfirmation(Peer peer, string confirm);
RequestInitHook requestInitHook;
ConfirmHook responseHook;
ConfirmHook requestHook;
RequestNonceFailedHook requestNonceFailedHook;
optional<Ref> result;
enum class StatePhase {
NoPairing,
OurRequest,
OurRequestConfirm,
OurRequestReady,
PeerRequest,
PeerRequestConfirm,
PairingDone,
PairingFailed
};
struct State {
StatePhase phase;
vector<uint8_t> nonce;
vector<uint8_t> peerCheck;
};
map<Peer, State> peerStates;
mutex stateLock;
};
template<class Result>
class PairingService : public PairingServiceBase
{
protected:
virtual Stored<Result> handlePairingComplete(const Peer &) = 0;
virtual void handlePairingResult(Context &, Stored<Result>) = 0;
virtual Ref handlePairingCompleteRef(const Peer &) override final;
virtual void handlePairingResult(Context &) override final;
};
template<class Result>
Ref PairingService<Result>::handlePairingCompleteRef(const Peer & peer)
{
return handlePairingComplete(peer).ref();
}
template<class Result>
void PairingService<Result>::handlePairingResult(Context & ctx)
{
handlePairingResult(ctx, Stored<Result>::load(ctx.ref()));
}
}
|