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
|
/*
* ngtcp2
*
* Copyright (c) 2017 ngtcp2 contributors
*
* 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 SHARED_H
#define SHARED_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif // defined(HAVE_CONFIG_H)
#include <optional>
#include <string_view>
#include <span>
#include <ngtcp2/ngtcp2.h>
#include "network.h"
using namespace std::literals;
namespace ngtcp2 {
enum class AppProtocol {
H3,
HQ,
};
template <size_t N>
consteval std::span<const uint8_t> as_uint8_span(const uint8_t (&s)[N]) {
return {s, N - 1};
}
inline constexpr uint8_t RAW_HQ_ALPN[] = "\xahq-interop";
inline constexpr auto HQ_ALPN = as_uint8_span(RAW_HQ_ALPN);
inline constexpr auto HQ_ALPN_V1 = as_uint8_span(RAW_HQ_ALPN);
inline constexpr uint8_t RAW_H3_ALPN[] = "\x2h3";
inline constexpr auto H3_ALPN = as_uint8_span(RAW_H3_ALPN);
inline constexpr auto H3_ALPN_V1 = as_uint8_span(RAW_H3_ALPN);
inline constexpr uint32_t TLS_ALERT_ECH_REQUIRED = 121;
// msghdr_get_ecn gets ECN bits from |msg|. |family| is the address
// family from which packet is received.
uint8_t msghdr_get_ecn(msghdr *msg, int family);
// fd_set_recv_ecn sets socket option to |fd| so that it can receive
// ECN bits.
void fd_set_recv_ecn(int fd, int family);
// fd_set_ip_mtu_discover sets IP(V6)_MTU_DISCOVER socket option to
// |fd|.
void fd_set_ip_mtu_discover(int fd, int family);
// fd_set_ip_dontfrag sets IP(V6)_DONTFRAG socket option to |fd|.
void fd_set_ip_dontfrag(int fd, int family);
// fd_set_udp_gro sets UDP_GRO socket option to |fd|.
void fd_set_udp_gro(int fd);
std::optional<Address> msghdr_get_local_addr(msghdr *msg, int family);
// msghdr_get_udp_gro returns UDP_GRO value from |msg|. If UDP_GRO is
// not found, or UDP_GRO is not supported, this function returns 0.
size_t msghdr_get_udp_gro(msghdr *msg);
void set_port(Address &dst, const Address &src);
// get_local_addr stores preferred local address (interface address)
// in |iau| for a given destination address |remote_addr|.
int get_local_addr(in_addr_union &iau, const Address &remote_addr);
// addreq returns true if |sa| and |iau| contain the same address.
bool addreq(const sockaddr *sa, const in_addr_union &iau);
} // namespace ngtcp2
#endif // !defined(SHARED_H)
|
