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package ebpf
import (
"fmt"
"os/exec"
"strconv"
"syscall"
"unsafe"
"github.com/evilsocket/opensnitch/daemon/log"
daemonNetlink "github.com/evilsocket/opensnitch/daemon/netlink"
elf "github.com/iovisor/gobpf/elf"
)
// print map contents. used only for debugging
func dumpMap(bpfmap *elf.Map, isIPv6 bool) {
var lookupKey []byte
var nextKey []byte
var value []byte
if !isIPv6 {
lookupKey = make([]byte, 12)
nextKey = make([]byte, 12)
} else {
lookupKey = make([]byte, 36)
nextKey = make([]byte, 36)
}
value = make([]byte, 40)
firstrun := true
i := 0
for {
i++
ok, err := m.LookupNextElement(bpfmap, unsafe.Pointer(&lookupKey[0]),
unsafe.Pointer(&nextKey[0]), unsafe.Pointer(&value[0]))
if err != nil {
log.Error("eBPF LookupNextElement error: %v", err)
return
}
if firstrun {
// on first run lookupKey is a dummy, nothing to delete
firstrun = false
copy(lookupKey, nextKey)
continue
}
fmt.Println("key, value", lookupKey, value)
if !ok { //reached end of map
break
}
copy(lookupKey, nextKey)
}
}
//PrintEverything prints all the stats. used only for debugging
func PrintEverything() {
bash, _ := exec.LookPath("bash")
//get the number of the first map
out, err := exec.Command(bash, "-c", "bpftool map show | head -n 1 | cut -d ':' -f1").Output()
if err != nil {
fmt.Println("bpftool map dump name tcpMap ", err)
}
i, _ := strconv.Atoi(string(out[:len(out)-1]))
fmt.Println("i is", i)
//dump all maps for analysis
for j := i; j < i+14; j++ {
_, _ = exec.Command(bash, "-c", "bpftool map dump id "+strconv.Itoa(j)+" > dump"+strconv.Itoa(j)).Output()
}
alreadyEstablished.RLock()
for sock1, v := range alreadyEstablished.TCP {
fmt.Println(*sock1, v)
}
fmt.Println("---------------------")
for sock1, v := range alreadyEstablished.TCPv6 {
fmt.Println(*sock1, v)
}
alreadyEstablished.RUnlock()
fmt.Println("---------------------")
sockets, _ := daemonNetlink.SocketsDump(syscall.AF_INET, syscall.IPPROTO_TCP)
for idx := range sockets {
fmt.Println("socket tcp: ", sockets[idx])
}
fmt.Println("---------------------")
sockets, _ = daemonNetlink.SocketsDump(syscall.AF_INET6, syscall.IPPROTO_TCP)
for idx := range sockets {
fmt.Println("socket tcp6: ", sockets[idx])
}
fmt.Println("---------------------")
sockets, _ = daemonNetlink.SocketsDump(syscall.AF_INET, syscall.IPPROTO_UDP)
for idx := range sockets {
fmt.Println("socket udp: ", sockets[idx])
}
fmt.Println("---------------------")
sockets, _ = daemonNetlink.SocketsDump(syscall.AF_INET6, syscall.IPPROTO_UDP)
for idx := range sockets {
fmt.Println("socket udp6: ", sockets[idx])
}
}
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