-
Notifications
You must be signed in to change notification settings - Fork 0
/
sflow.go
130 lines (105 loc) · 3.06 KB
/
sflow.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
/*
* Copyright (C) 2017 Red Hat, Inc.
*
* 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 ofthe 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 specificlanguage governing permissions and
* limitations under the License.
*
*/
package probes
import (
"fmt"
"strings"
"github.com/skydive-project/skydive/api/types"
"github.com/skydive-project/skydive/common"
"github.com/skydive-project/skydive/flow"
"github.com/skydive-project/skydive/graffiti/graph"
"github.com/skydive-project/skydive/probe"
"github.com/skydive-project/skydive/sflow"
)
const (
defaultPort = 6343
)
type sFlowProbe struct {
tid string
ft *flow.Table
}
// SFlowProbesHandler describes a sFlow probe in the graph
type SFlowProbesHandler struct {
Ctx Context
allocator *sflow.AgentAllocator
staticPorts map[string]string
}
// UnregisterProbe unregisters a probe from the graph
func (d *SFlowProbesHandler) UnregisterProbe(n *graph.Node, e ProbeEventHandler, p Probe) error {
probe := p.(*sFlowProbe)
d.Ctx.FTA.Release(probe.ft)
d.allocator.Release(probe.tid)
if e != nil {
go e.OnStopped()
}
return nil
}
// RegisterProbe registers a probe in the graph
func (d *SFlowProbesHandler) RegisterProbe(n *graph.Node, capture *types.Capture, e ProbeEventHandler) (Probe, error) {
tid, _ := n.GetFieldString("TID")
if tid == "" {
return nil, fmt.Errorf("No TID for node %v", n)
}
addresses, _ := n.GetFieldStringList("IPV4")
if len(addresses) == 0 {
return nil, fmt.Errorf("No IP for node %v", n)
}
address := "0.0.0.0"
if len(addresses) == 1 {
address = strings.Split(addresses[0], "/")[0]
}
port := capture.Port
if capture.Port <= 0 {
port = defaultPort
}
headerSize := flow.DefaultCaptureLength
if capture.HeaderSize != 0 {
headerSize = uint32(capture.HeaderSize)
}
uuids := flow.UUIDs{NodeTID: tid, CaptureID: capture.UUID}
ft := d.Ctx.FTA.Alloc(uuids, tableOptsFromCapture(capture))
addr := common.ServiceAddress{Addr: address, Port: port}
if _, err := d.allocator.Alloc(tid, ft, capture.BPFFilter, headerSize, &addr, n, d.Ctx.Graph); err != nil {
return nil, err
}
go e.OnStarted(&CaptureMetadata{SFlowSocket: addr.String()})
return &sFlowProbe{
ft: ft,
tid: tid,
}, nil
}
// Start a probe
func (d *SFlowProbesHandler) Start() {
}
// Stop a probe
func (d *SFlowProbesHandler) Stop() {
d.allocator.ReleaseAll()
}
// CaptureTypes supported
func (d *SFlowProbesHandler) CaptureTypes() []string {
return []string{"sflow"}
}
// Init initializes a new sFlow probe
func (d *SFlowProbesHandler) Init(ctx Context, bundle *probe.Bundle) (FlowProbeHandler, error) {
allocator, err := sflow.NewAgentAllocator()
if err != nil {
return nil, err
}
d.Ctx = ctx
d.allocator = allocator
return d, nil
}