-
Notifications
You must be signed in to change notification settings - Fork 0
/
util.go
164 lines (148 loc) · 3.34 KB
/
util.go
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
package outbound
import (
"bytes"
"context"
"crypto/tls"
"fmt"
"net"
"net/netip"
"regexp"
"strconv"
"sync"
"github.com/lingyicute/yiclashcore/component/resolver"
C "github.com/lingyicute/yiclashcore/constant"
"github.com/lingyicute/yiclashcore/transport/socks5"
)
var (
globalClientSessionCache tls.ClientSessionCache
once sync.Once
)
func getClientSessionCache() tls.ClientSessionCache {
once.Do(func() {
globalClientSessionCache = tls.NewLRUClientSessionCache(128)
})
return globalClientSessionCache
}
func serializesSocksAddr(metadata *C.Metadata) []byte {
var buf [][]byte
addrType := metadata.AddrType()
aType := uint8(addrType)
p := uint(metadata.DstPort)
port := []byte{uint8(p >> 8), uint8(p & 0xff)}
switch addrType {
case socks5.AtypDomainName:
lenM := uint8(len(metadata.Host))
host := []byte(metadata.Host)
buf = [][]byte{{aType, lenM}, host, port}
case socks5.AtypIPv4:
host := metadata.DstIP.AsSlice()
buf = [][]byte{{aType}, host, port}
case socks5.AtypIPv6:
host := metadata.DstIP.AsSlice()
buf = [][]byte{{aType}, host, port}
}
return bytes.Join(buf, nil)
}
func resolveUDPAddr(ctx context.Context, network, address string) (*net.UDPAddr, error) {
host, port, err := net.SplitHostPort(address)
if err != nil {
return nil, err
}
ip, err := resolver.ResolveProxyServerHost(ctx, host)
if err != nil {
return nil, err
}
return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
}
func resolveUDPAddrWithPrefer(ctx context.Context, network, address string, prefer C.DNSPrefer) (*net.UDPAddr, error) {
host, port, err := net.SplitHostPort(address)
if err != nil {
return nil, err
}
var ip netip.Addr
var fallback netip.Addr
switch prefer {
case C.IPv4Only:
ip, err = resolver.ResolveIPv4ProxyServerHost(ctx, host)
case C.IPv6Only:
ip, err = resolver.ResolveIPv6ProxyServerHost(ctx, host)
case C.IPv6Prefer:
var ips []netip.Addr
ips, err = resolver.LookupIPProxyServerHost(ctx, host)
if err == nil {
for _, addr := range ips {
if addr.Is6() {
ip = addr
break
} else {
if !fallback.IsValid() {
fallback = addr
}
}
}
}
default:
// C.IPv4Prefer, C.DualStack and other
var ips []netip.Addr
ips, err = resolver.LookupIPProxyServerHost(ctx, host)
if err == nil {
for _, addr := range ips {
if addr.Is4() {
ip = addr
break
} else {
if !fallback.IsValid() {
fallback = addr
}
}
}
}
}
if !ip.IsValid() && fallback.IsValid() {
ip = fallback
}
if err != nil {
return nil, err
}
return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
}
func safeConnClose(c net.Conn, err error) {
if err != nil && c != nil {
_ = c.Close()
}
}
var rateStringRegexp = regexp.MustCompile(`^(\d+)\s*([KMGT]?)([Bb])ps$`)
func StringToBps(s string) uint64 {
if s == "" {
return 0
}
// when have not unit, use Mbps
if v, err := strconv.Atoi(s); err == nil {
return StringToBps(fmt.Sprintf("%d Mbps", v))
}
m := rateStringRegexp.FindStringSubmatch(s)
if m == nil {
return 0
}
var n uint64 = 1
switch m[2] {
case "T":
n *= 1000
fallthrough
case "G":
n *= 1000
fallthrough
case "M":
n *= 1000
fallthrough
case "K":
n *= 1000
}
v, _ := strconv.ParseUint(m[1], 10, 64)
n *= v
if m[3] == "b" {
// Bits, need to convert to bytes
n /= 8
}
return n
}