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// Copyright (c) Authors of Clover
//
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Apache License, Version 2.0
// which accompanies this distribution, and is available at
// http://www.apache.org/licenses/LICENSE-2.0
package clovisor
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"net"
"strconv"
"strings"
"github.com/go-redis/redis"
opentracing "github.com/opentracing/opentracing-go"
jaeger "github.com/uber/jaeger-client-go"
jaeger_config "github.com/uber/jaeger-client-go/config"
)
var redisServer string = "redis.clover-system"
var jaegerCollector string = "jaeger-collector.clover-system:14268"
var jaegerAgent string = "jaeger-agent.clover-system:6831"
var ProtoCfg string = "clovisor_proto_cfg"
var protoPluginCfgChan string = "clovisor_proto_plugin_cfg_chan"
/*
* redisConnect: redis client connecting to redis server
*/
func redisConnect() *redis.Client {
client := redis.NewClient(&redis.Options{
Addr: fmt.Sprintf("%s:6379", redisServer),
Password: "",
DB: 0,
})
return client
}
func get_cfg_labels(node_name string) ([]string, error) {
client := redisConnect()
defer client.Close()
labels_list, err := client.LRange("clovisor_labels", 0, -1).Result()
if err != nil {
fmt.Println(err.Error())
return nil, err
}
return labels_list, err
}
func get_egress_match_list(pod_name string) ([]egress_match_t) {
client := redisConnect()
defer client.Close()
egress_cfg_list, err := client.LRange("clovior_egress_match", 0, -1).Result()
if err != nil {
fmt.Println(err.Error())
return nil
}
ret_list := make([]egress_match_t, 0, len(egress_cfg_list))
for _, em_cfg_str := range(egress_cfg_list) {
fmt.Printf("egress match cfg == %v\n", em_cfg_str)
em_cfg_slice := strings.Split(em_cfg_str, ":")
if len(em_cfg_slice) < 2 {
fmt.Printf("egress match config requires at least two fields [%v]\n", em_cfg_slice)
continue
} else if len(em_cfg_slice) == 3 {
if strings.Contains(pod_name, em_cfg_slice[2]) {
fmt.Printf("%v != %v, filtering out this config for pod %v\n",
em_cfg_slice[2], pod_name, pod_name)
continue
}
}
var ip uint32 = 0
if em_cfg_slice[0] != "0" {
ip = ip2Long(em_cfg_slice[0])
}
port_32, _ := strconv.Atoi(em_cfg_slice[1])
port := uint16(port_32)
ret_list = append(ret_list, egress_match_t{ip, port})
}
return ret_list
}
// following function comes from
// https://www.socketloop.com/tutorials/golang-convert-ip-address-string-to-long-unsigned-32-bit-integer
func ip2Long(ip string) uint32 {
var long uint32
//binary.Read(bytes.NewBuffer(net.ParseIP(ip).To4()), binary.LittleEndian, &long)
binary.Read(bytes.NewBuffer(net.ParseIP(ip).To4()), binary.BigEndian, &long)
return long
}
func backtoIP4(ipInt int64) string {
// need to do two bit shifting and “0xff” masking
b0 := strconv.FormatInt((ipInt>>24)&0xff, 10)
b1 := strconv.FormatInt((ipInt>>16)&0xff, 10)
b2 := strconv.FormatInt((ipInt>>8)&0xff, 10)
b3 := strconv.FormatInt((ipInt & 0xff), 10)
return b0 + "." + b1 + "." + b2 + "." + b3
}
func get_cfg_session_match() ([]egress_match_cfg, error) {
var ret_list []egress_match_cfg
client := redisConnect()
defer client.Close()
keys, err := client.HKeys("clovisor_session_match").Result()
if err != nil {
fmt.Println(err.Error())
return nil, err
}
for _, key := range keys {
value, err := client.HGet("clovisor_session_match", key).Result()
if err != nil {
fmt.Println(err.Error())
continue
}
match_slice := strings.Split(key, "-")
dst_ip := ip2Long(match_slice[0])
dst_port, _ := strconv.Atoi(match_slice[1])
egress_match := egress_match_t{
dst_ip: dst_ip,
dst_port: uint16(dst_port),
}
// organize into internally understandable struct
ret_list = append(ret_list, egress_match_cfg{
egress_match: egress_match,
action: value,
})
}
return ret_list, nil
}
func initJaeger(service string) (opentracing.Tracer, io.Closer) {
cfg := &jaeger_config.Configuration{
Sampler: &jaeger_config.SamplerConfig{
Type: "const",
Param: 1,
},
Reporter: &jaeger_config.ReporterConfig{
LogSpans: true,
CollectorEndpoint: fmt.Sprintf("http://%s/api/traces", jaegerCollector),
LocalAgentHostPort: fmt.Sprintf("%s", jaegerAgent),
},
}
tracer, closer, err := cfg.New(service, jaeger_config.Logger(jaeger.StdLogger))
if err != nil {
panic(fmt.Sprintf("ERROR: cannot init Jaeger: %v\n", err))
}
return tracer, closer
}
func get_jaeger_server() (string, error) {
client := redisConnect()
defer client.Close()
return client.Get("clovisor_jaeger_server").Result()
}
func Monitor_proto_plugin_cfg() {
client := redisConnect()
//defer client.Close()
pubsub := client.Subscribe(protoPluginCfgChan)
//defer pubsub.Close()
go func() {
for {
msg, err := pubsub.ReceiveMessage()
if err != nil {
fmt.Printf("Error getting protocol plugin configuration: %v\n", err)
return
}
fmt.Printf("Update on protocol %v notification received\n", msg.Payload)
loadProtoParser(msg.Payload, true)
}
}()
}
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