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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2021 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SHRPX_QUIC_CONNECTION_HANDLER_H
#define SHRPX_QUIC_CONNECTION_HANDLER_H
#include "shrpx.h"
#include <memory>
#include <unordered_map>
#include <string>
#include <vector>
#include <ngtcp2/ngtcp2.h>
#include <ev.h>
#include "shrpx_quic.h"
#include "network.h"
using namespace nghttp2;
namespace shrpx {
struct UpstreamAddr;
class ClientHandler;
class Worker;
// CloseWait handles packets received in close-wait (draining or
// closing period).
struct CloseWait {
CloseWait(Worker *worker, std::vector<ngtcp2_cid> scids,
std::vector<uint8_t> pkt, ev_tstamp period);
~CloseWait();
int handle_packet(const UpstreamAddr *faddr, const Address &remote_addr,
const Address &local_addr, const ngtcp2_pkt_info &pi,
std::span<const uint8_t> data);
Worker *worker;
// Source Connection IDs of the connection.
std::vector<ngtcp2_cid> scids;
// QUIC packet which is sent in response to the incoming packet. It
// might be empty.
std::vector<uint8_t> pkt;
// Close-wait (draining or closing period) timer.
ev_timer timer;
// The number of bytes received during close-wait period.
size_t bytes_recv;
// The number of bytes sent during close-wait period.
size_t bytes_sent;
// The number of packets received during close-wait period.
size_t num_pkts_recv;
// If the number of packets received reaches this number, send a
// QUIC packet.
size_t next_pkts_recv;
};
class QUICConnectionHandler {
public:
QUICConnectionHandler(Worker *worker);
~QUICConnectionHandler();
int handle_packet(const UpstreamAddr *faddr, const Address &remote_addr,
const Address &local_addr, const ngtcp2_pkt_info &pi,
std::span<const uint8_t> data);
// Send Retry packet. |ini_dcid| is the destination Connection ID
// which appeared in Client Initial packet. |ini_scid| is the
// source Connection ID which appeared in Client Initial packet.
int send_retry(const UpstreamAddr *faddr, uint32_t version,
std::span<const uint8_t> ini_dcid,
std::span<const uint8_t> ini_scid, const Address &remote_addr,
const Address &local_addr, size_t max_pktlen);
// Send Version Negotiation packet. |ini_dcid| is the destination
// Connection ID which appeared in Client Initial packet.
// |ini_scid| is the source Connection ID which appeared in Client
// Initial packet.
int send_version_negotiation(const UpstreamAddr *faddr, uint32_t version,
std::span<const uint8_t> ini_dcid,
std::span<const uint8_t> ini_scid,
const Address &remote_addr,
const Address &local_addr);
int send_stateless_reset(const UpstreamAddr *faddr, size_t pktlen,
std::span<const uint8_t> dcid,
const Address &remote_addr,
const Address &local_addr);
// Send Initial CONNECTION_CLOSE. |ini_dcid| is the destination
// Connection ID which appeared in Client Initial packet.
// |ini_scid| is the source Connection ID which appeared in Client
// Initial packet.
int send_connection_close(const UpstreamAddr *faddr, uint32_t version,
const ngtcp2_cid &ini_dcid,
const ngtcp2_cid &ini_scid,
const Address &remote_addr,
const Address &local_addr, uint64_t error_code,
size_t max_pktlen);
ClientHandler *
handle_new_connection(const UpstreamAddr *faddr, const Address &remote_addr,
const Address &local_addr, const ngtcp2_pkt_hd &hd,
const ngtcp2_cid *odcid, std::span<const uint8_t> token,
ngtcp2_token_type token_type);
void add_connection_id(const ngtcp2_cid &cid, ClientHandler *handler);
void remove_connection_id(const ngtcp2_cid &cid);
void add_close_wait(CloseWait *cw);
void remove_close_wait(const CloseWait *cw);
void on_stateless_reset_bucket_regen();
private:
Worker *worker_;
std::unordered_map<ngtcp2_cid, ClientHandler *> connections_;
std::unordered_map<ngtcp2_cid, CloseWait *> close_waits_;
ev_timer stateless_reset_bucket_regen_timer_;
size_t stateless_reset_bucket_;
};
} // namespace shrpx
#endif // !defined(SHRPX_QUIC_CONNECTION_HANDLER_H)