forked from sampork/go-sniffer
/
cmd.go
145 lines (123 loc) · 3.13 KB
/
cmd.go
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package core
import (
"os"
"strings"
"fmt"
"net"
"strconv"
)
const InternalCmdPrefix = "--"
const (
InternalCmdHelp = "help"
InternalCmdEnv = "env"
InternalCmdList = "list"
InternalCmdVer = "ver"
InternalDevice = "dev"
)
type Cmd struct {
Device string
plugHandle *Plug
}
func NewCmd(p *Plug) *Cmd {
return &Cmd{
plugHandle:p,
}
}
//start
func (cm *Cmd) Run() {
//print help
if len(os.Args) <= 1 {
cm.printHelpMessage()
os.Exit(1)
}
//parse command
firstArg := string(os.Args[1])
if strings.HasPrefix(firstArg, InternalCmdPrefix) {
cm.parseInternalCmd()
} else {
cm.parsePlugCmd()
}
}
//parse internal commend
//like --help, --env, --device
func (cm *Cmd) parseInternalCmd() {
arg := string(os.Args[1])
cmd := strings.Trim(arg, InternalCmdPrefix)
switch cmd {
case InternalCmdHelp:
cm.printHelpMessage()
break
case InternalCmdEnv:
fmt.Println("External plug-in path : "+cm.plugHandle.dir)
break
case InternalCmdList:
cm.plugHandle.PrintList()
break
case InternalCmdVer:
fmt.Println(cxt.Version)
break
case InternalDevice:
cm.printDevice()
break
}
os.Exit(1)
}
//usage
func (cm *Cmd) printHelpMessage() {
fmt.Println("==================================================================================")
fmt.Println("[Usage]")
fmt.Println("")
fmt.Println(" go-sniffer [device] [plug] [plug's params(optional)]")
fmt.Println()
fmt.Println(" [exp]")
fmt.Println(" go-sniffer en0 redis Capture redis packet")
fmt.Println(" go-sniffer en0 mysql -p 3306 Capture mysql packet")
fmt.Println()
fmt.Println(" go-sniffer --[commend]")
fmt.Println(" --help \"this page\"")
fmt.Println(" --env \"environment variable\"")
fmt.Println(" --list \"Plug-in list\"")
fmt.Println(" --ver \"version\"")
fmt.Println(" --dev \"device\"")
fmt.Println(" [exp]")
fmt.Println(" go-sniffer --list \"show all plug-in\"")
fmt.Println()
fmt.Println("==================================================================================")
cm.printDevice()
fmt.Println("==================================================================================")
}
//print plug-in list
func (cm *Cmd) printPlugList() {
l := len(cm.plugHandle.InternalPlugList)
l += len(cm.plugHandle.ExternalPlugList)
fmt.Println("# Number of plug-ins : "+strconv.Itoa(l))
}
//print device
func (cm *Cmd) printDevice() {
ifaces, err:= net.Interfaces()
if err != nil {
panic(err)
}
for _, iface := range ifaces {
addrs, _ := iface.Addrs()
for _,a:=range addrs {
if ipnet, ok := a.(*net.IPNet); ok {
if ip4 := ipnet.IP.To4(); ip4 != nil {
fmt.Println("[device] : "+iface.Name+" : "+iface.HardwareAddr.String()+" "+ip4.String())
}
}
}
}
}
//Parameters needed for plug-ins
func (cm *Cmd) parsePlugCmd() {
if len(os.Args) < 3 {
fmt.Println("not found [Plug-in name]")
fmt.Println("go-sniffer [device] [plug] [plug's params(optional)]")
os.Exit(1)
}
cm.Device = os.Args[1]
plugName := os.Args[2]
plugParams:= os.Args[3:]
cm.plugHandle.SetOption(plugName, plugParams)
}