/
netstat.go
93 lines (78 loc) · 2.68 KB
/
netstat.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
/*
*
* * Licensed to the Apache Software Foundation (ASF) under one or more
* * contributor license agreements. See the NOTICE file distributed with
* * this work for additional information regarding copyright ownership.
* * The ASF licenses this file to You 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 netstat
import (
"fmt"
"net"
)
// SockAddr represents an ip:port pair
type SockAddr struct {
IP net.IP
Port uint16
}
func (s *SockAddr) String() string {
return fmt.Sprintf("%v:%d", s.IP, s.Port)
}
// SockTabEntry type represents each line of the /proc/net/[tcp|udp]
type SockTabEntry struct {
ino string
LocalAddr *SockAddr
RemoteAddr *SockAddr
State SkState
UID uint32
Process *Process
}
// Process holds the PID and process name to which each socket belongs
type Process struct {
Pid int
Name string
}
func (p *Process) String() string {
return fmt.Sprintf("%d/%s", p.Pid, p.Name)
}
// SkState type represents socket connection state
type SkState uint8
func (s SkState) String() string {
return skStates[s]
}
// AcceptFn is used to filter socket entries. The value returned indicates
// whether the element is to be appended to the socket list.
type AcceptFn func(*SockTabEntry) bool
// NoopFilter - a test function returning true for all elements
func NoopFilter(*SockTabEntry) bool { return true }
// TCPSocks returns a slice of active TCP sockets containing only those
// elements that satisfy the accept function
func TCPSocks(accept AcceptFn) ([]SockTabEntry, error) {
return osTCPSocks(accept)
}
// TCP6Socks returns a slice of active TCP IPv4 sockets containing only those
// elements that satisfy the accept function
func TCP6Socks(accept AcceptFn) ([]SockTabEntry, error) {
return osTCP6Socks(accept)
}
// UDPSocks returns a slice of active UDP sockets containing only those
// elements that satisfy the accept function
func UDPSocks(accept AcceptFn) ([]SockTabEntry, error) {
return osUDPSocks(accept)
}
// UDP6Socks returns a slice of active UDP IPv6 sockets containing only those
// elements that satisfy the accept function
func UDP6Socks(accept AcceptFn) ([]SockTabEntry, error) {
return osUDP6Socks(accept)
}