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//go:build linux
// +build linux
package main
import (
"flag"
"fmt"
"log"
"net"
"os"
"sort"
"github.com/vishvananda/netlink"
)
type command struct {
Function func([]string)
Description string
ArgCount int
}
var (
commands = map[string]command{
"protocol": {cmdProtocol, "prints the protocol version", 0},
"create": {cmdCreate, "creates a new ipset", 2},
"destroy": {cmdDestroy, "creates a new ipset", 1},
"list": {cmdList, "list specific ipset", 1},
"listall": {cmdListAll, "list all ipsets", 0},
"add": {cmdAddDel(netlink.IpsetAdd), "add entry", 2},
"del": {cmdAddDel(netlink.IpsetDel), "delete entry", 2},
"test": {cmdTest, "test whether an entry is in a set or not", 2},
}
timeoutVal *uint32
timeout = flag.Int("timeout", -1, "timeout, negative means omit the argument")
comment = flag.String("comment", "", "comment")
withComments = flag.Bool("with-comments", false, "create set with comment support")
withCounters = flag.Bool("with-counters", false, "create set with counters support")
withSkbinfo = flag.Bool("with-skbinfo", false, "create set with skbinfo support")
replace = flag.Bool("replace", false, "replace existing set/entry")
)
func main() {
flag.Parse()
args := flag.Args()
if len(args) < 1 {
printUsage()
os.Exit(1)
}
if *timeout >= 0 {
v := uint32(*timeout)
timeoutVal = &v
}
log.SetFlags(log.Lshortfile)
cmdName := args[0]
args = args[1:]
cmd, exist := commands[cmdName]
if !exist {
fmt.Printf("Unknown command '%s'\n\n", cmdName)
printUsage()
os.Exit(1)
}
if cmd.ArgCount != len(args) {
fmt.Printf("Invalid number of arguments. expected=%d given=%d\n", cmd.ArgCount, len(args))
os.Exit(1)
}
cmd.Function(args)
}
func printUsage() {
fmt.Printf("Usage: %s COMMAND [args] [-flags]\n\n", os.Args[0])
names := make([]string, 0, len(commands))
for name := range commands {
names = append(names, name)
}
sort.Strings(names)
fmt.Println("Available commands:")
for _, name := range names {
fmt.Printf(" %-15v %s\n", name, commands[name].Description)
}
fmt.Println("\nAvailable flags:")
flag.PrintDefaults()
}
func cmdProtocol(_ []string) {
protocol, minProto, err := netlink.IpsetProtocol()
check(err)
log.Println("Protocol:", protocol, "min:", minProto)
}
func cmdCreate(args []string) {
err := netlink.IpsetCreate(args[0], args[1], netlink.IpsetCreateOptions{
Replace: *replace,
Timeout: timeoutVal,
Comments: *withComments,
Counters: *withCounters,
Skbinfo: *withSkbinfo,
})
check(err)
}
func cmdDestroy(args []string) {
check(netlink.IpsetDestroy(args[0]))
}
func cmdList(args []string) {
result, err := netlink.IpsetList(args[0])
check(err)
log.Printf("%+v", result)
}
func cmdListAll(args []string) {
result, err := netlink.IpsetListAll()
check(err)
for _, ipset := range result {
log.Printf("%+v", ipset)
}
}
func cmdAddDel(f func(string, *netlink.IPSetEntry) error) func([]string) {
return func(args []string) {
setName := args[0]
element := args[1]
mac, _ := net.ParseMAC(element)
entry := netlink.IPSetEntry{
Timeout: timeoutVal,
MAC: mac,
Comment: *comment,
Replace: *replace,
}
check(f(setName, &entry))
}
}
func cmdTest(args []string) {
setName := args[0]
element := args[1]
ip := net.ParseIP(element)
entry := &netlink.IPSetEntry{
Timeout: timeoutVal,
IP: ip,
Comment: *comment,
Replace: *replace,
}
exist, err := netlink.IpsetTest(setName, entry)
check(err)
log.Printf("existence: %t\n", exist)
}
// panic on error
func check(err error) {
if err != nil {
panic(err)
}
}
|
