├── README.md ├── api ├── api.go └── server.go ├── common └── common.go ├── connect └── conn.go ├── lib ├── config.go └── nmap.go ├── libnet.go ├── netstat └── netstat.go ├── packet └── sniff.go ├── pics ├── libnetgo_1.gif ├── pic1.png └── pic2.png ├── user └── user.go └── web ├── web.htm └── web_files ├── bootstrap.min.css ├── bootstrap.min.js ├── dashboard.css ├── holder.min.js ├── ie-emulation-modes-warning.js ├── ie10-viewport-bug-workaround.css ├── ie10-viewport-bug-workaround.js └── jquery.min.js /README.md: -------------------------------------------------------------------------------- 1 | # libNetGo (Linux网络分析工具) 2 | 3 | > libNetGo特点 4 | 5 | - 支持Console和Web方式输出 6 | - 实时显示TCP 连接源/目标/用户/进程 7 | - 实时显示进/出网络包统计 8 | - Golang+websocket开发 9 | - API接口Json数据输出和网络包统计开关控制 10 | 11 | > libNetGo命令行输出 12 | 13 | ![libnetgo](https://github.com/gotoolkits/libnetgo/blob/master/pics/pic1.png) 14 | 15 | 16 | > libNetGo WebUI输出 17 | 18 | ![libnetgo](https://github.com/gotoolkits/libnetgo/blob/master/pics/pic2.png) 19 | 20 | 21 | > 安装 22 | 23 | - 依赖安装： libpcap（数据包捕获函数库） 24 | 25 | ``` 26 | apt-get install libpcap-dev 27 | OR 28 | apt-get install tcpdump 29 | ``` 30 | 31 | 32 | - libNetGo 源码安装 33 | 34 | ``` 35 | go get github.com/gotoolkits/libnetgo 36 | cd $GOPATH/src/github.com/gotoolkits/libnetgo 37 | go build libnet.go 38 | ``` 39 | 40 | > 执行参数说明 41 | 42 | ``` 43 | libnetgo [-hs] [-ip ipAddr] [-r interval] [-t all/remote/local] 44 | 45 | -h 帮助 46 | -c 开启Console输出 47 | -ip 指定网络包统计接口IP地址 48 | -r 统计与显示间隔（默认3秒） 49 | -s 开启API服务（默认开启true，false/true） 50 | -t 输出的TCP连接类型 （all/remote/local 默认"all") 51 | ``` 52 | 53 | > 使用演示 54 | 55 | ![libnetgo](https://github.com/gotoolkits/libnetgo/blob/master/pics/libnetgo_1.gif) 56 | 57 | -------------------------------------------------------------------------------- /api/api.go: -------------------------------------------------------------------------------- 1 | package api 2 | 3 | import ( 4 | "github.com/gotoolkits/libnetgo/connect" 5 | "github.com/gotoolkits/libnetgo/packet" 6 | "time" 7 | 8 | "github.com/gorilla/websocket" 9 | "github.com/labstack/echo" 10 | log "github.com/sirupsen/logrus" 11 | "html/template" 12 | "io" 13 | "net/http" 14 | ) 15 | 16 | type SvrStatus struct { 17 | Stime string `json:"start_time"` 18 | SniffStart bool `json:"Sniff_Start"` 19 | // Queue UQueue `json:"Queue"` 20 | SyncErrUsers []string `json:"syncErrUsers"` 21 | } 22 | 23 | type SysInfo struct { 24 | AppID string `json:"AppID"` 25 | SysName string `json:"AppName"` 26 | Version string `json:"Version"` 27 | APIs []string `json:"APIs"` 28 | Author string `json:"Author"` 29 | } 30 | 31 | type Switch struct { 32 | Token string `json:"token" xml:"token" form:"token" query:"token"` 33 | HostIp string `json:"HostIp" xml:"HostIp" form:"HostIp" query:"HostIp"` 34 | Code string `json:"Code" xml:"Code" form:"Code" query:"Code"` 35 | } 36 | 37 | var ( 38 | svrstus SvrStatus 39 | uuid = "c98bad34-e0f2-4eec-bf98-2eda26af935c" 40 | info SysInfo 41 | HostIP string 42 | 43 | upgrader = websocket.Upgrader{} 44 | ) 45 | 46 | type TemplateRenderer struct { 47 | templates *template.Template 48 | } 49 | 50 | func (t *TemplateRenderer) Render(w io.Writer, name string, data interface{}, c echo.Context) error { 51 | return t.templates.ExecuteTemplate(w, name, data) 52 | } 53 | 54 | func init() { 55 | 56 | info = SysInfo{ 57 | AppID: uuid, 58 | SysName: "linux network analyzer", 59 | Version: "V1.0.1", 60 | APIs: nil, 61 | Author: "gotoolkits", 62 | } 63 | 64 | } 65 | 66 | func fnTcp(c echo.Context) error { 67 | 68 | //c.Render(http.StatusOK, "webUi", "") 69 | ws, err := upgrader.Upgrade(c.Response(), c.Request(), nil) 70 | if err != nil { 71 | log.Errorln(err) 72 | return err 73 | } 74 | defer ws.Close() 75 | 76 | for { 77 | // Write 78 | err := ws.WriteJSON(connect.GetConnsList()) 79 | if err != nil { 80 | log.Errorln(err) 81 | return nil 82 | } 83 | time.Sleep(3 * time.Second) 84 | } 85 | // return c.Render(http.StatusOK, "webUi", connect.GetConnsList()) 86 | } 87 | 88 | func fnInfo(c echo.Context) error { 89 | return c.JSONPretty(http.StatusOK, info, " ") 90 | } 91 | 92 | func fnHealthCheck(c echo.Context) error { 93 | return c.String(http.StatusOK, "Success") 94 | } 95 | 96 | func fnStatus(c echo.Context) error { 97 | // staticsticsStatus() 98 | svrstus.SniffStart = packet.Start 99 | return c.JSONPretty(http.StatusOK, svrstus, " ") 100 | } 101 | 102 | func FnGetConns(c echo.Context) error { 103 | return c.JSONPretty(http.StatusOK, connect.GetConns("all"), " ") 104 | } 105 | 106 | func FnGetLocalConns(c echo.Context) error { 107 | return c.JSONPretty(http.StatusOK, connect.GetConns("local"), " ") 108 | 109 | } 110 | 111 | func FnGetRemoteConns(c echo.Context) error { 112 | return c.JSONPretty(http.StatusOK, connect.GetConns("remote"), " ") 113 | } 114 | 115 | func FnSniffOn(c echo.Context) error { 116 | if len(HostIP) < 1 { 117 | return c.String(http.StatusOK, "Unspecified IP parameter'-ip', unable to open packet capture function") 118 | } 119 | packet.StartNetSniff(HostIP) 120 | return c.String(http.StatusOK, "done") 121 | } 122 | 123 | func FnSniffOff(c echo.Context) error { 124 | if len(HostIP) < 1 { 125 | return c.String(http.StatusOK, "Unspecified IP parameter'-ip', unable to open packet capture function") 126 | } 127 | packet.StopNetSniff() 128 | return c.String(http.StatusOK, "done") 129 | } 130 | 131 | func FnSniffStart(c echo.Context) error { 132 | sw := new(Switch) 133 | if err := c.Bind(sw); err != nil { 134 | log.Errorln(err) 135 | return c.String(http.StatusUnauthorized, "Parse_Failed") 136 | } 137 | 138 | if sw.Code == "" || sw.Token == "" || sw.HostIp == "" { 139 | return c.String(http.StatusNonAuthoritativeInfo, "Args_Null") 140 | } 141 | if sw.Token != "c98bad34-e0f2-4eec-bf98-2eda26af935c" { 142 | return c.String(http.StatusUnauthorized, "Token_auth_failed") 143 | } 144 | 145 | if sw.Code == "1" { 146 | packet.StartNetSniff(sw.HostIp) 147 | return c.String(http.StatusOK, "On") 148 | } 149 | if sw.Code == "0" { 150 | packet.StopNetSniff() 151 | return c.String(http.StatusOK, "Off") 152 | } 153 | return c.String(http.StatusOK, "None") 154 | } 155 | -------------------------------------------------------------------------------- /api/server.go: -------------------------------------------------------------------------------- 1 | package api 2 | 3 | import ( 4 | "github.com/labstack/echo" 5 | "github.com/labstack/echo/middleware" 6 | "html/template" 7 | "time" 8 | ) 9 | 10 | var ( 11 | sHost = "18081" 12 | ) 13 | 14 | func ServerRun() { 15 | e := echo.New() 16 | e.HideBanner = true 17 | 18 | renderer := &TemplateRenderer{ 19 | templates: template.Must(template.ParseGlob("web/web.htm")), 20 | } 21 | e.Renderer = renderer 22 | 23 | e.Use(middleware.CORSWithConfig(middleware.CORSConfig{ 24 | AllowOrigins: []string{"*"}, 25 | AllowMethods: []string{echo.GET, echo.HEAD, echo.PUT, echo.POST}, 26 | AllowHeaders: []string{echo.HeaderOrigin, echo.HeaderContentType, echo.HeaderAccept}, 27 | })) 28 | 29 | e.Static("/", "web") 30 | e.GET("/ws", fnTcp) 31 | 32 | //self running status for monitor 33 | e.GET("/health", fnHealthCheck) 34 | e.GET("/status", fnStatus) 35 | e.GET("/info", fnInfo) 36 | 37 | e.GET("/api/getconns", FnGetConns) 38 | e.GET("/api/getlconns", FnGetLocalConns) 39 | e.GET("/api/getrconns", FnGetRemoteConns) 40 | e.GET("/api/sniffon", FnSniffOn) 41 | e.GET("/api/sniffoff", FnSniffOff) 42 | 43 | e.POST("/api/sniff", FnSniffStart) 44 | svrstus.Stime = time.Now().Format("2006-01-02 15:04:05") 45 | 46 | e.Logger.Fatal(e.Start(":" + sHost)) 47 | } 48 | -------------------------------------------------------------------------------- /common/common.go: -------------------------------------------------------------------------------- 1 | package common 2 | 3 | import ( 4 | "log" 5 | "net" 6 | "os/exec" 7 | "regexp" 8 | "runtime" 9 | "strings" 10 | 11 | "github.com/axgle/mahonia" 12 | ) 13 | 14 | var ( 15 | LocalIP string 16 | ServerIPList []string 17 | ) 18 | 19 | func Cmdexec(cmd string) string { 20 | var c *exec.Cmd 21 | var data string 22 | system := runtime.GOOS 23 | argArray := strings.Split(cmd, " ") 24 | c = exec.Command(argArray[0], argArray[1:]...) 25 | out, _ := c.CombinedOutput() 26 | data = string(out) 27 | if system == "windows" { 28 | dec := mahonia.NewDecoder("gbk") 29 | data = dec.ConvertString(data) 30 | } 31 | return data 32 | } 33 | 34 | func InArray(list []string, value string, regex bool) bool { 35 | for _, v := range list { 36 | if regex { 37 | if ok, err := regexp.Match(v, []byte(value)); ok { 38 | return true 39 | } else if err != nil { 40 | log.Println(err.Error()) 41 | } 42 | } else { 43 | if value == v { 44 | return true 45 | } 46 | } 47 | } 48 | return false 49 | } 50 | 51 | func ParseCIDR(str string) (net.IP, *net.IPNet, error) { 52 | return net.ParseCIDR(str) 53 | } 54 | 55 | func ParseIP(str string) net.IP { 56 | return net.ParseIP(str) 57 | } 58 | 59 | func IsLoopback(ip net.IP) bool { 60 | return ip.IsLoopback() 61 | } 62 | 63 | func IsPublicIP(IP net.IP) bool { 64 | if IP.IsLoopback() || IP.IsLinkLocalMulticast() || IP.IsLinkLocalUnicast() { 65 | return false 66 | } 67 | if ip4 := IP.To4(); ip4 != nil { 68 | switch true { 69 | case ip4[0] == 10: 70 | return false 71 | case ip4[0] == 172 && ip4[1] >= 16 && ip4[1] <= 31: 72 | return false 73 | case ip4[0] == 192 && ip4[1] == 168: 74 | return false 75 | default: 76 | return true 77 | } 78 | } 79 | return false 80 | } 81 | 82 | func VerifyIP(ipAddr string) (bool, error) { 83 | ifaces, e := net.Interfaces() 84 | if e != nil { 85 | return false, e 86 | } 87 | 88 | for _, iface := range ifaces { 89 | addrs, e := iface.Addrs() 90 | if e != nil { 91 | continue 92 | } 93 | for _, addr := range addrs { 94 | var ip net.IP 95 | switch v := addr.(type) { 96 | case *net.IPNet: 97 | ip = v.IP 98 | case *net.IPAddr: 99 | ip = v.IP 100 | } 101 | if ip == nil || ip.IsLoopback() { 102 | continue 103 | } 104 | ip = ip.To4() 105 | if ip == nil { 106 | continue 107 | } 108 | 109 | if ip.String() == ipAddr { 110 | return true, nil 111 | } 112 | } 113 | } 114 | return false, nil 115 | } 116 | -------------------------------------------------------------------------------- /connect/conn.go: -------------------------------------------------------------------------------- 1 | package connect 2 | 3 | import ( 4 | "fmt" 5 | "github.com/gotoolkits/libnetgo/common" 6 | "github.com/gotoolkits/libnetgo/netstat" 7 | ) 8 | 9 | func GetConns(connType string) map[string]netstat.Process { 10 | if connType == "all" { 11 | return getAllConns() 12 | } else if connType == "local" { 13 | return getLocalConns() 14 | } else { 15 | return getRemoteConns() 16 | } 17 | } 18 | func GetConnsV6(connType string) map[string]netstat.Process { 19 | if connType == "all" { 20 | return getAllConnsV6() 21 | } else if connType == "local" { 22 | return getLocalConnsV6() 23 | } else { 24 | return getRemoteConnsV6() 25 | } 26 | } 27 | 28 | func getAllConns() map[string]netstat.Process { 29 | m := map[string]netstat.Process{} 30 | 31 | netTcpv4List := netstat.Tcp() 32 | for _, p := range netTcpv4List { 33 | if p.State == "ESTABLISHED" { 34 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 35 | m[itemId] = p 36 | } 37 | } 38 | return m 39 | } 40 | 41 | func getAllConnsV6() map[string]netstat.Process { 42 | m := map[string]netstat.Process{} 43 | 44 | netTcpv6List := netstat.Tcp6() 45 | for _, p := range netTcpv6List { 46 | if p.State == "ESTABLISHED" { 47 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 48 | m[itemId] = p 49 | } 50 | } 51 | return m 52 | } 53 | 54 | func getLocalConns() map[string]netstat.Process { 55 | m := map[string]netstat.Process{} 56 | 57 | netTcpv4List := netstat.Tcp() 58 | for _, p := range netTcpv4List { 59 | if p.State == "ESTABLISHED" { 60 | ipaddr := common.ParseIP(p.ForeignIp) 61 | if !common.IsPublicIP(ipaddr) { 62 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 63 | m[itemId] = p 64 | } 65 | } 66 | } 67 | return m 68 | } 69 | func getLocalConnsV6() map[string]netstat.Process { 70 | m := map[string]netstat.Process{} 71 | 72 | netTcpv6List := netstat.Tcp6() 73 | for _, p := range netTcpv6List { 74 | if p.State == "ESTABLISHED" { 75 | ipaddr := common.ParseIP(p.ForeignIp) 76 | if !common.IsPublicIP(ipaddr) { 77 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 78 | m[itemId] = p 79 | } 80 | 81 | } 82 | } 83 | return m 84 | } 85 | 86 | func getRemoteConns() map[string]netstat.Process { 87 | m := map[string]netstat.Process{} 88 | 89 | netTcpv4List := netstat.Tcp() 90 | for _, p := range netTcpv4List { 91 | if p.State == "ESTABLISHED" { 92 | ipaddr := common.ParseIP(p.ForeignIp) 93 | if common.IsPublicIP(ipaddr) { 94 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 95 | m[itemId] = p 96 | } 97 | } 98 | } 99 | return m 100 | } 101 | func getRemoteConnsV6() map[string]netstat.Process { 102 | m := map[string]netstat.Process{} 103 | 104 | netTcpv6List := netstat.Tcp6() 105 | for _, p := range netTcpv6List { 106 | if p.State == "ESTABLISHED" { 107 | ipaddr := common.ParseIP(p.ForeignIp) 108 | if !common.IsPublicIP(ipaddr) { 109 | itemId := fmt.Sprintf("%s:%v-%s:%v", p.Ip, p.Port, p.ForeignIp, p.ForeignPort) 110 | m[itemId] = p 111 | } 112 | } 113 | } 114 | return m 115 | } 116 | 117 | func GetListenPortAndNames() map[string]string { 118 | m := map[string]string{} 119 | 120 | netTcpv4List := netstat.Tcp() 121 | for _, p := range netTcpv4List { 122 | if p.State == "LISTEN" { 123 | ipaddr := common.ParseIP(p.Ip) 124 | if !common.IsLoopback(ipaddr) { 125 | port := fmt.Sprintf("%v", p.Port) 126 | m[port] = p.Name 127 | } 128 | } 129 | } 130 | return m 131 | } 132 | func GetListenPortAndNamesV6() map[string]string { 133 | m := map[string]string{} 134 | netTcpv6List := netstat.Tcp6() 135 | for _, p := range netTcpv6List { 136 | if p.State == "LISTEN" { 137 | port := fmt.Sprintf("%v", p.Port) 138 | m[port] = p.Name 139 | } 140 | } 141 | return m 142 | } 143 | 144 | func GetConnsList() []netstat.Process { 145 | // return []netstat.Process{ 146 | // {User: "root", 147 | // Name: "test", 148 | // Pid: "1010", 149 | // Exe: "wget", 150 | // State: "sss", 151 | // Ip: "8.8.8.8", 152 | // Port: 8080, 153 | // ForeignIp: "127.0.0.1", 154 | // ForeignPort: 8080, 155 | // In: 1, 156 | // Out: 1, 157 | // InRate: 1, 158 | // OutRate: 1}, 159 | // {User: "lab", 160 | // Name: "lab", 161 | // Pid: "1010", 162 | // Exe: "wget", 163 | // State: "sss", 164 | // Ip: "8.8.8.8", 165 | // Port: 8080, 166 | // ForeignIp: "127.0.0.1", 167 | // ForeignPort: 8080, 168 | // In: 1, 169 | // Out: 1, 170 | // InRate: 1, 171 | // OutRate: 1}, 172 | // } 173 | return netstat.Tcp() 174 | } 175 | 176 | func isListenPort(port string) bool { 177 | list := GetListenPortAndNames() 178 | _, ok := list[port] 179 | if ok { 180 | return true 181 | } 182 | return false 183 | } 184 | -------------------------------------------------------------------------------- /lib/config.go: -------------------------------------------------------------------------------- 1 | package lib 2 | 3 | type filterInfo struct { 4 | Port []int 5 | Process []string 6 | File []string 7 | } 8 | 9 | var filter filterInfo 10 | 11 | const ( 12 | fileSize int64 = 20480000 13 | UDP uint8 = 17 14 | TCP uint8 = 6 15 | ) 16 | -------------------------------------------------------------------------------- /lib/nmap.go: -------------------------------------------------------------------------------- 1 | package lib 2 | 3 | import ( 4 | "sync" 5 | ) 6 | 7 | type SafeMap struct { 8 | sync.RWMutex 9 | M map[string]interface{} 10 | } 11 | 12 | func NewSafeMap() *SafeMap { 13 | return &SafeMap{ 14 | M: make(map[string]interface{}), 15 | } 16 | } 17 | 18 | func (this *SafeMap) Put(key string, val interface{}) { 19 | this.Lock() 20 | this.M[key] = val 21 | this.Unlock() 22 | } 23 | 24 | func (this *SafeMap) Get(key string) (interface{}, bool) { 25 | this.RLock() 26 | val, exists := this.M[key] 27 | this.RUnlock() 28 | return val, exists 29 | } 30 | 31 | func (this *SafeMap) Remove(key string) { 32 | this.Lock() 33 | delete(this.M, key) 34 | this.Unlock() 35 | } 36 | 37 | func (this *SafeMap) GetAndRemove(key string) (interface{}, bool) { 38 | this.Lock() 39 | val, exists := this.M[key] 40 | if exists { 41 | delete(this.M, key) 42 | } 43 | this.Unlock() 44 | return val, exists 45 | } 46 | 47 | func (this *SafeMap) Clear() { 48 | this.Lock() 49 | this.M = make(map[string]interface{}) 50 | this.Unlock() 51 | } 52 | 53 | func (this *SafeMap) Keys() []string { 54 | this.RLock() 55 | defer this.RUnlock() 56 | 57 | keys := make([]string, 0) 58 | for key, _ := range this.M { 59 | keys = append(keys, key) 60 | } 61 | return keys 62 | } 63 | 64 | func (this *SafeMap) Slice() []interface{} { 65 | this.RLock() 66 | defer this.RUnlock() 67 | 68 | vals := make([]interface{}, 0) 69 | for _, val := range this.M { 70 | vals = append(vals, val) 71 | } 72 | return vals 73 | } 74 | 75 | func (this *SafeMap) ContainsKey(key string) bool { 76 | this.RLock() 77 | _, exists := this.M[key] 78 | this.RUnlock() 79 | return exists 80 | } 81 | 82 | func (this *SafeMap) Size() int { 83 | this.RLock() 84 | len := len(this.M) 85 | this.RUnlock() 86 | return len 87 | } 88 | 89 | func (this *SafeMap) IsEmpty() bool { 90 | this.RLock() 91 | empty := (len(this.M) == 0) 92 | this.RUnlock() 93 | return empty 94 | } 95 | -------------------------------------------------------------------------------- /libnet.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "flag" 5 | "fmt" 6 | "github.com/gotoolkits/libnetgo/api" 7 | "github.com/gotoolkits/libnetgo/common" 8 | "github.com/gotoolkits/libnetgo/connect" 9 | "github.com/gotoolkits/libnetgo/netstat" 10 | log "github.com/sirupsen/logrus" 11 | "os" 12 | "time" 13 | ) 14 | 15 | var ( 16 | h bool 17 | svr bool 18 | console bool 19 | host string 20 | interval int 21 | connType string 22 | ) 23 | 24 | func init() { 25 | flag.BoolVar(&h, "h", false, "libnetgo help") 26 | flag.BoolVar(&svr, "s", true, "api server") 27 | flag.BoolVar(&console, "c", false, "console mode") 28 | flag.StringVar(&host, "ip", "", "ip address for pcap.") 29 | flag.IntVar(&interval, "r", 3, "To get datas interval,default 3 second.") 30 | flag.StringVar(&connType, "t", "all", "all/remote/local") 31 | flag.Usage = usage 32 | } 33 | 34 | func main() { 35 | flag.Parse() 36 | if h { 37 | flag.Usage() 38 | os.Exit(0) 39 | } 40 | if svr { 41 | go api.ServerRun() 42 | } 43 | 44 | //api.ServerRun() 45 | 46 | if len(host) > 1 { 47 | if ok, _ := common.VerifyIP(host); ok { 48 | api.HostIP = host 49 | } 50 | } else { 51 | log.Warningln("Unspecified IP parameter'-ip', unable to open packet capture function") 52 | } 53 | 54 | for { 55 | if console { 56 | formatNetstat(connect.GetConns(connType)) 57 | } else { 58 | connect.GetConns(connType) 59 | } 60 | time.Sleep(time.Duration(interval) * time.Second) 61 | } 62 | 63 | } 64 | 65 | func formatNetstat(ns map[string]netstat.Process) { 66 | fmt.Println("=======================================================================================================================") 67 | fmt.Println("| PID | USER | IPLINK |IN|OUT(k)|SENT|RECEIVED(kB/s)| PROGRAM |") 68 | fmt.Println("=======================================================================================================================") 69 | for itemId, info := range ns { 70 | fmt.Printf(" %-6s %-8s %-40s %-6d%-6d%-6d%-6d %-s\n", 71 | info.Pid, info.User, itemId, info.In/1024, info.Out/1024, info.OutRate/1024, info.InRate/1024, info.Exe) 72 | } 73 | 74 | } 75 | 76 | func usage() { 77 | fmt.Fprintf(os.Stderr, `libnetgo version: libnetgo/1.0 78 | Usage: libnetgo [-hs] [-ip ipAddr] [-r interval] [-t all/remote/local] 79 | 80 | Options: 81 | `) 82 | flag.PrintDefaults() 83 | } 84 | -------------------------------------------------------------------------------- /netstat/netstat.go: -------------------------------------------------------------------------------- 1 | /* 2 | Simple Netstat implementation by golang. 3 | Get linux system net data from: 4 | /proc/net/tcp 5 | /proc/net/udp 6 | Parse net system pid info from: 7 | /proc/[0-9]/fd/[0-9]. 8 | */ 9 | 10 | package netstat 11 | 12 | import ( 13 | "fmt" 14 | "github.com/gotoolkits/libnetgo/packet" 15 | "github.com/gotoolkits/libnetgo/user" 16 | "io/ioutil" 17 | "os" 18 | "path/filepath" 19 | "regexp" 20 | "strconv" 21 | "strings" 22 | ) 23 | 24 | const ( 25 | PROC_TCP = "/proc/net/tcp" 26 | PROC_UDP = "/proc/net/udp" 27 | PROC_TCP6 = "/proc/net/tcp6" 28 | PROC_UDP6 = "/proc/net/udp6" 29 | ) 30 | 31 | var STATE = map[string]string{ 32 | "01": "ESTABLISHED", 33 | "02": "SYN_SENT", 34 | "03": "SYN_RECV", 35 | "04": "FIN_WAIT1", 36 | "05": "FIN_WAIT2", 37 | "06": "TIME_WAIT", 38 | "07": "CLOSE", 39 | "08": "CLOSE_WAIT", 40 | "09": "LAST_ACK", 41 | "0A": "LISTEN", 42 | "0B": "CLOSING", 43 | } 44 | 45 | type Process struct { 46 | User string `json:"user"` 47 | Name string `json:"name"` 48 | Pid string `json:"pid"` 49 | Exe string `json:"exe"` 50 | State string `json:"state"` 51 | Ip string `json:"ip"` 52 | Port int64 `json:"port"` 53 | ForeignIp string `json:"foreignip"` 54 | ForeignPort int64 `json:"foreignport"` 55 | In int64 `json:"in"` 56 | Out int64 `json:"out"` 57 | InRate int64 `json:"inRate"` 58 | OutRate int64 `json:"outRate"` 59 | } 60 | 61 | func getData(t string) []string { 62 | var proc_t string 63 | 64 | if t == "tcp" { 65 | proc_t = PROC_TCP 66 | } else if t == "udp" { 67 | proc_t = PROC_UDP 68 | } else if t == "tcp6" { 69 | proc_t = PROC_TCP6 70 | } else if t == "udp6" { 71 | proc_t = PROC_UDP6 72 | } else { 73 | fmt.Printf("%s is a invalid type, tcp and udp only!\n", t) 74 | os.Exit(1) 75 | } 76 | 77 | data, err := ioutil.ReadFile(proc_t) 78 | if err != nil { 79 | fmt.Println(err) 80 | os.Exit(1) 81 | } 82 | lines := strings.Split(string(data), "\n") 83 | 84 | // Return lines without Header line and blank line on the end 85 | return lines[1 : len(lines)-1] 86 | 87 | } 88 | 89 | func hexToDec(h string) int64 { 90 | // convert hexadecimal to decimal. 91 | d, err := strconv.ParseInt(h, 16, 32) 92 | if err != nil { 93 | fmt.Println(err) 94 | os.Exit(1) 95 | } 96 | 97 | return d 98 | } 99 | 100 | func convertIp(ip string) string { 101 | // Convert the ipv4 to decimal. Have to rearrange the ip because the 102 | // default value is in little Endian order. 103 | 104 | var out string 105 | 106 | // Check ip size if greater than 8 is a ipv6 type 107 | if len(ip) > 8 { 108 | i := []string{ip[30:32], 109 | ip[28:30], 110 | ip[26:28], 111 | ip[24:26], 112 | ip[22:24], 113 | ip[20:22], 114 | ip[18:20], 115 | ip[16:18], 116 | ip[14:16], 117 | ip[12:14], 118 | ip[10:12], 119 | ip[8:10], 120 | ip[6:8], 121 | ip[4:6], 122 | ip[2:4], 123 | ip[0:2]} 124 | out = fmt.Sprintf("%v%v:%v%v:%v%v:%v%v:%v%v:%v%v:%v%v:%v%v", 125 | i[14], i[15], i[13], i[12], 126 | i[10], i[11], i[8], i[9], 127 | i[6], i[7], i[4], i[5], 128 | i[2], i[3], i[0], i[1]) 129 | 130 | } else { 131 | i := []int64{hexToDec(ip[6:8]), 132 | hexToDec(ip[4:6]), 133 | hexToDec(ip[2:4]), 134 | hexToDec(ip[0:2])} 135 | 136 | out = fmt.Sprintf("%v.%v.%v.%v", i[0], i[1], i[2], i[3]) 137 | } 138 | return out 139 | } 140 | 141 | func findPid(inode string) string { 142 | // Loop through all fd dirs of process on /proc to compare the inode and 143 | // get the pid. 144 | 145 | pid := "-" 146 | 147 | d, err := filepath.Glob("/proc/[0-9]*/fd/[0-9]*") 148 | if err != nil { 149 | fmt.Println(err) 150 | os.Exit(1) 151 | } 152 | 153 | re := regexp.MustCompile(inode) 154 | for _, item := range d { 155 | path, _ := os.Readlink(item) 156 | out := re.FindString(path) 157 | if len(out) != 0 { 158 | pid = strings.Split(item, "/")[2] 159 | } 160 | } 161 | return pid 162 | } 163 | 164 | func getProcessExe(pid string) string { 165 | exe := fmt.Sprintf("/proc/%s/exe", pid) 166 | path, _ := os.Readlink(exe) 167 | return path 168 | } 169 | 170 | func getProcessName(exe string) string { 171 | n := strings.Split(exe, "/") 172 | name := n[len(n)-1] 173 | return strings.Title(name) 174 | } 175 | 176 | func getUser(uid string) string { 177 | // rewrite package os/user funcation LookupId dependence on cgo 178 | u, err := user.LookupUserId(uid) 179 | if err != nil { 180 | fmt.Println(err) 181 | } 182 | 183 | return u.Username 184 | } 185 | 186 | func removeEmpty(array []string) []string { 187 | // remove empty data from line 188 | var new_array []string 189 | for _, i := range array { 190 | if i != "" { 191 | new_array = append(new_array, i) 192 | } 193 | } 194 | return new_array 195 | } 196 | 197 | // Return a array of Process with Name, Ip, Port, State .. etc 198 | // Require Root acess to get information about some processes. 199 | func netstat(t string) []Process { 200 | 201 | var Processes []Process 202 | var in, out, inRate, outRate int64 203 | 204 | data := getData(t) 205 | 206 | for _, line := range data { 207 | 208 | // local ip and port 209 | line_array := removeEmpty(strings.Split(strings.TrimSpace(line), " ")) 210 | 211 | ip_port := strings.Split(line_array[1], ":") 212 | ip := convertIp(ip_port[0]) 213 | port := hexToDec(ip_port[1]) 214 | 215 | // foreign ip and port 216 | fip_port := strings.Split(line_array[2], ":") 217 | 218 | fip := convertIp(fip_port[0]) 219 | 220 | // not write local listenning records 221 | if fip == "0.0.0.0" { 222 | continue 223 | } 224 | 225 | fport := hexToDec(fip_port[1]) 226 | 227 | state := STATE[line_array[3]] 228 | uid := getUser(line_array[7]) 229 | pid := findPid(line_array[9]) 230 | exe := getProcessExe(pid) 231 | name := getProcessName(exe) 232 | 233 | // itemid index pcap Map 234 | itemId := fmt.Sprintf("%s:%v-%s:%v", ip, port, fip, fport) 235 | if v, ok := packet.PkgAcc[itemId]; ok { 236 | in = v["in"] 237 | inRate = v["inRate"] 238 | out = v["out"] 239 | outRate = v["outRate"] 240 | } 241 | 242 | p := Process{uid, name, pid, exe, state, ip, port, fip, fport, in, out, inRate, outRate} 243 | 244 | Processes = append(Processes, p) 245 | 246 | } 247 | 248 | return Processes 249 | } 250 | 251 | // Tcp func Get a slice of Process type with TCP data 252 | func Tcp() []Process { 253 | data := netstat("tcp") 254 | return data 255 | } 256 | 257 | // Udp func Get a slice of Process type with UDP data 258 | func Udp() []Process { 259 | data := netstat("udp") 260 | return data 261 | } 262 | 263 | // Tcp6 func Get a slice of Process type with TCP6 data 264 | func Tcp6() []Process { 265 | data := netstat("tcp6") 266 | return data 267 | } 268 | 269 | // Udp6 func Get a slice of Process type with UDP6 data 270 | func Udp6() []Process { 271 | data := netstat("udp6") 272 | return data 273 | } 274 | -------------------------------------------------------------------------------- /packet/sniff.go: -------------------------------------------------------------------------------- 1 | package packet 2 | 3 | import ( 4 | "context" 5 | "errors" 6 | "fmt" 7 | "github.com/google/gopacket" 8 | "github.com/google/gopacket/layers" 9 | "github.com/google/gopacket/pcap" 10 | log "github.com/sirupsen/logrus" 11 | "net" 12 | "time" 13 | ) 14 | 15 | type NetPkt struct { 16 | LocalIP net.IP 17 | RemoteIP net.IP 18 | LocalPort layers.TCPPort 19 | RemotePort layers.TCPPort 20 | Direct string 21 | Len uint16 22 | } 23 | 24 | var ( 25 | snapshot_len int32 = 65536 26 | promiscuous bool = false 27 | err error 28 | timeout time.Duration = 30 * time.Second 29 | handle *pcap.Handle 30 | 31 | ethLayer layers.Ethernet 32 | ipLayer layers.IPv4 33 | tcpLayer layers.TCP 34 | 35 | LocalIP, RemoteIP net.IP 36 | LocalPort, RemotePort layers.TCPPort 37 | Dir string 38 | pLen uint16 39 | 40 | PkgAcc map[string]map[string]int64 41 | AccIntv int64 = 3 42 | Ctx context.Context 43 | Cancel context.CancelFunc 44 | 45 | Start bool 46 | ) 47 | 48 | func init() { 49 | PkgAcc = make(map[string]map[string]int64) 50 | } 51 | 52 | func StartNetSniff(ipAddr string) { 53 | if Start { 54 | return 55 | } 56 | Start = true 57 | PkgAcc = make(map[string]map[string]int64) 58 | 59 | ctx, cancel := context.WithCancel(context.Background()) 60 | Ctx = ctx 61 | Cancel = cancel 62 | go startNetSniff(ctx, ipAddr) 63 | 64 | } 65 | 66 | func StopNetSniff() { 67 | if !Start { 68 | return 69 | } 70 | 71 | Cancel() 72 | PkgAcc = make(map[string]map[string]int64) 73 | } 74 | 75 | func startNetSniff(ctx context.Context, ipAddr string) { 76 | 77 | handle, err := getPcapHandle(ipAddr) 78 | if err != nil { 79 | return 80 | } 81 | 82 | packetSource := gopacket.NewPacketSource(handle, handle.LinkType()) 83 | 84 | go accumulator(ctx) 85 | 86 | for packet := range packetSource.Packets() { 87 | select { 88 | case <-ctx.Done(): 89 | log.Warningln("Packet sniff Stop") 90 | handle.Close() 91 | 92 | return 93 | default: 94 | parser := gopacket.NewDecodingLayerParser( 95 | layers.LayerTypeEthernet, 96 | ðLayer, 97 | &ipLayer, 98 | &tcpLayer, 99 | ) 100 | foundLayerTypes := []gopacket.LayerType{} 101 | 102 | err := parser.DecodeLayers(packet.Data(), &foundLayerTypes) 103 | if err != nil { 104 | // fmt.Println("Trouble decoding layers: ", err) 105 | } 106 | 107 | for _, layerType := range foundLayerTypes { 108 | if layerType == layers.LayerTypeIPv4 { 109 | 110 | if ipLayer.SrcIP.String() != ipAddr { 111 | LocalIP = ipLayer.DstIP 112 | RemoteIP = ipLayer.SrcIP 113 | LocalPort = tcpLayer.DstPort 114 | RemotePort = tcpLayer.SrcPort 115 | pLen = ipLayer.Length 116 | 117 | Dir = "in" 118 | 119 | itemId := fmt.Sprintf("%s:%d-%s:%d", LocalIP, LocalPort, RemoteIP, RemotePort) 120 | 121 | if _, ok := PkgAcc[itemId]; !ok { 122 | PkgAcc[itemId] = map[string]int64{ 123 | "in": 0, 124 | "out": 0, 125 | "inRate": 0, 126 | "outRate": 0, 127 | "lastAccTime": 0, 128 | "lastAccIn": 0, 129 | "lastAccOut": 0, 130 | } 131 | } 132 | 133 | PkgAcc[itemId][Dir] = PkgAcc[itemId][Dir] + int64(pLen) 134 | 135 | } else { 136 | LocalIP = ipLayer.SrcIP 137 | RemoteIP = ipLayer.DstIP 138 | LocalPort = tcpLayer.SrcPort 139 | RemotePort = tcpLayer.DstPort 140 | pLen = ipLayer.Length 141 | 142 | Dir = "out" 143 | 144 | itemId := fmt.Sprintf("%s:%d-%s:%d", LocalIP, LocalPort, RemoteIP, RemotePort) 145 | 146 | if _, ok := PkgAcc[itemId]; !ok { 147 | PkgAcc[itemId] = map[string]int64{ 148 | "in": 0, 149 | "out": 0, 150 | "inRate": 0, 151 | "outRate": 0, 152 | "lastAccTime": 0, 153 | "lastAccIn": 0, 154 | "lastAccOut": 0, 155 | } 156 | } 157 | PkgAcc[itemId][Dir] = PkgAcc[itemId][Dir] + int64(pLen) 158 | } 159 | } 160 | } 161 | 162 | } 163 | 164 | } 165 | } 166 | 167 | func getPcapHandle(ip string) (*pcap.Handle, error) { 168 | devs, err := pcap.FindAllDevs() 169 | if err != nil { 170 | return nil, err 171 | } 172 | var device string 173 | for _, dev := range devs { 174 | for _, v := range dev.Addresses { 175 | if v.IP.String() == ip { 176 | device = dev.Name 177 | break 178 | } 179 | } 180 | } 181 | if device == "" { 182 | return nil, errors.New("find device error") 183 | } 184 | 185 | h, err := pcap.OpenLive(device, snapshot_len, promiscuous, timeout) 186 | if err != nil { 187 | return nil, err 188 | } 189 | log.Println("⇨ Starting net traffic monitor...") 190 | var filter string = "tcp and (not broadcast and not multicast)" 191 | err = h.SetBPFFilter(filter) 192 | if err != nil { 193 | return nil, err 194 | } 195 | return h, nil 196 | } 197 | 198 | func accumulator(ctx context.Context) { 199 | log.Infoln("⇨ Accumulator thread is starting...") 200 | for { 201 | select { 202 | case <-ctx.Done(): 203 | log.Warningln("accumulator thread is stop.") 204 | Start = false 205 | return 206 | default: 207 | for _, pkgMap := range PkgAcc { 208 | start := time.Now().Unix() 209 | in := pkgMap["in"] 210 | out := pkgMap["out"] 211 | 212 | if pkgMap["lastAccTime"] == 0 { 213 | pkgMap["lastAccTime"] = start - AccIntv 214 | } 215 | 216 | last := pkgMap["lastAccTime"] 217 | pkgMap["lastAccTime"] = start 218 | 219 | durSec := start - last 220 | 221 | if in == 0 { 222 | pkgMap["inRate"] = 0 223 | } else { 224 | pkgMap["inRate"] = (in - pkgMap["lastAccIn"]) / durSec 225 | } 226 | 227 | if out == 0 { 228 | pkgMap["outRate"] = 0 229 | } else { 230 | pkgMap["outRate"] = (out - pkgMap["lastAccOut"]) / durSec 231 | 232 | } 233 | 234 | pkgMap["lastAccIn"] = in 235 | pkgMap["lastAccOut"] = out 236 | } 237 | 238 | time.Sleep(time.Duration(AccIntv) * time.Second) 239 | 240 | } 241 | 242 | } 243 | } 244 | -------------------------------------------------------------------------------- /pics/libnetgo_1.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gotoolkits/libnetgo/c9d27d5c94b28d43e4d30768902cbdc251edd5a9/pics/libnetgo_1.gif -------------------------------------------------------------------------------- /pics/pic1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gotoolkits/libnetgo/c9d27d5c94b28d43e4d30768902cbdc251edd5a9/pics/pic1.png -------------------------------------------------------------------------------- /pics/pic2.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gotoolkits/libnetgo/c9d27d5c94b28d43e4d30768902cbdc251edd5a9/pics/pic2.png -------------------------------------------------------------------------------- /user/user.go: -------------------------------------------------------------------------------- 1 | package user 2 | 3 | import ( 4 | "bufio" 5 | "bytes" 6 | "errors" 7 | "io" 8 | "os" 9 | "strconv" 10 | "strings" 11 | ) 12 | 13 | const userFile = "/etc/passwd" 14 | 15 | type User struct { 16 | Uid string 17 | Gid string 18 | Username string 19 | Name string 20 | HomeDir string 21 | } 22 | 23 | var colon = []byte{':'} 24 | 25 | func LookupUserId(uid string) (*User, error) { 26 | f, err := os.Open(userFile) 27 | if err != nil { 28 | return nil, err 29 | } 30 | defer f.Close() 31 | return findUserId(uid, f) 32 | } 33 | 34 | func findUserId(uid string, r io.Reader) (*User, error) { 35 | _, e := strconv.Atoi(uid) 36 | if e != nil { 37 | return nil, e 38 | } 39 | bs := bufio.NewScanner(r) 40 | substr := []byte(":" + uid) 41 | for bs.Scan() { 42 | lineBytes := bs.Bytes() 43 | 44 | if !bytes.Contains(lineBytes, substr) || bytes.Count(lineBytes, colon) < 6 { 45 | continue 46 | } 47 | text := strings.TrimSpace(removeComment(string(lineBytes))) 48 | 49 | parts := strings.SplitN(text, ":", 7) 50 | if len(parts) < 6 { 51 | continue 52 | } 53 | if parts[2] == uid { 54 | return buildUser(parts), nil 55 | } 56 | } 57 | if err := bs.Err(); err != nil { 58 | return nil, err 59 | } 60 | return nil, unknownUserIdError(uid) 61 | } 62 | 63 | // buildUser builds a *User from the parts array. The fields in parts 64 | // correspond to the colon-delimited fields in the /etc/passwd file. The caller 65 | // is responsible for validating parts. 66 | func buildUser(parts []string) *User { 67 | u := &User{ 68 | Username: parts[0], 69 | Uid: parts[2], 70 | Gid: parts[3], 71 | Name: parts[4], 72 | HomeDir: parts[5], 73 | } 74 | // The pw_gecos field isn't quite standardized. Some docs 75 | // say: "It is expected to be a comma separated list of 76 | // personal data where the first item is the full name of the 77 | // user." 78 | if i := strings.Index(u.Name, ","); i >= 0 { 79 | u.Name = u.Name[:i] 80 | } 81 | return u 82 | } 83 | 84 | func findUsername(name string, r io.Reader) (*User, error) { 85 | bs := bufio.NewScanner(r) 86 | 87 | substr := []byte(name + ":") 88 | for bs.Scan() { 89 | lineBytes := bs.Bytes() 90 | if !bytes.Contains(lineBytes, substr) || bytes.Count(lineBytes, colon) < 6 { 91 | continue 92 | } 93 | text := strings.TrimSpace(removeComment(string(lineBytes))) 94 | parts := strings.SplitN(text, ":", 7) 95 | if len(parts) < 6 { 96 | continue 97 | } 98 | if parts[0] == name { 99 | return buildUser(parts), nil 100 | } 101 | } 102 | if err := bs.Err(); err != nil { 103 | return nil, err 104 | } 105 | return nil, unknownUserError(name) 106 | } 107 | 108 | func removeComment(line string) string { 109 | if i := strings.Index(line, "#"); i != -1 { 110 | return line[:i] 111 | } 112 | return line 113 | } 114 | 115 | func unknownUserError(user string) error { 116 | return errors.New("UnknownUserError: " + user) 117 | } 118 | 119 | func unknownUserIdError(id string) error { 120 | return errors.New("UnknownUserIdError: " + id) 121 | } 122 | -------------------------------------------------------------------------------- /web/web.htm: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | LibNetGo linux network anlayizer 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 32 | 33 | 34 | 35 | 61 | 62 | 89 | 90 |
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