forked from skydive-project/skydive
/
server.go
112 lines (98 loc) · 2.88 KB
/
server.go
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/*
* Copyright (C) 2016 Red Hat, Inc.
*
* 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 packet_injector
import (
"bytes"
"fmt"
"net/http"
"github.com/skydive-project/skydive/common"
shttp "github.com/skydive-project/skydive/http"
"github.com/skydive-project/skydive/logging"
"github.com/skydive-project/skydive/topology/graph"
)
const (
Namespace = "Packet_Injection"
)
type PacketInjectorServer struct {
shttp.DefaultWSClientEventHandler
WSAsyncClientPool *shttp.WSAsyncClientPool
Graph *graph.Graph
}
func (pis *PacketInjectorServer) injectPacket(msg shttp.WSMessage) (bool, string) {
params := struct {
SrcNode interface{}
DstNode interface{}
Type string
Payload string
Count int
}{}
if err := common.JsonDecode(bytes.NewBuffer([]byte(*msg.Obj)), ¶ms); err != nil {
e := fmt.Sprintf("Unable to decode packet inject param message %v", msg)
return false, e
}
var srcNode graph.Node
if err := srcNode.Decode(params.SrcNode); err != nil {
e := fmt.Sprintf("Unable to decode source node %s", err.Error())
return false, e
}
var dstNode graph.Node
if err := dstNode.Decode(params.DstNode); err != nil {
e := fmt.Sprintf("Unable to decode destination node %s", err.Error())
return false, e
}
pip := PacketParams{
SrcNode: &srcNode,
DstNode: &dstNode,
Type: params.Type,
Payload: params.Payload,
Count: params.Count,
}
if err := InjectPacket(&pip, pis.Graph); err != nil {
e := fmt.Sprintf("Failed to inject packet: %s", err.Error())
return false, e
}
return true, ""
}
func (pis *PacketInjectorServer) OnMessage(c *shttp.WSAsyncClient, msg shttp.WSMessage) {
if msg.Namespace != Namespace {
return
}
switch msg.Type {
case "InjectPacket":
status := http.StatusOK
result, e := pis.injectPacket(msg)
if !result {
logging.GetLogger().Errorf(e)
status = http.StatusBadRequest
}
reply := msg.Reply(e, "PIResult", status)
c.SendWSMessage(reply)
}
}
func NewServer(wspool *shttp.WSAsyncClientPool, graph *graph.Graph) *PacketInjectorServer {
s := &PacketInjectorServer{
WSAsyncClientPool: wspool,
Graph: graph,
}
wspool.AddEventHandler(s)
return s
}