forked from scionproto/scion
-
Notifications
You must be signed in to change notification settings - Fork 0
/
io.go
72 lines (60 loc) · 1.73 KB
/
io.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
// Copyright 2018 ETH Zurich
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package reconnect
import "net"
// IOOperation provides an abstraction around any Conn reads and writes. Types
// that implement this interface contain the Read/Write arguments and return
// values as fields, thus allowing the reconnection loop to run any I/O
// function without caring what it is.
type IOOperation interface {
// Runs the I/O operation on conn
Do(conn net.PacketConn) error
// IsWrite returns true for types implementing write operations
IsWrite() bool
}
type BaseOperation struct {
buffer []byte
numBytes int
}
type WriteOperation struct {
BaseOperation
}
func (_ *WriteOperation) IsWrite() bool {
return true
}
type WriteToOperation struct {
WriteOperation
address net.Addr
}
func (op *WriteToOperation) Do(conn net.PacketConn) error {
n, err := conn.WriteTo(op.buffer, op.address)
op.numBytes = n
return err
}
type ReadOperation struct {
BaseOperation
}
func (_ *ReadOperation) IsWrite() bool {
return false
}
type ReadFromOperation struct {
ReadOperation
address net.Addr
}
func (op *ReadFromOperation) Do(conn net.PacketConn) error {
n, address, err := conn.ReadFrom(op.buffer)
op.numBytes = n
op.address = address
return err
}