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toIncomingConnsFiltered.go
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/
toIncomingConnsFiltered.go
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/*
* NETCAP - Traffic Analysis Framework
* Copyright (c) 2017-2020 Philipp Mieden <dreadl0ck [at] protonmail [dot] ch>
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package transform
import (
netmaltego "github.com/dreadl0ck/netcap/maltego"
"log"
"os"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"github.com/dreadl0ck/maltego"
"github.com/dreadl0ck/netcap/resolvers"
"github.com/dreadl0ck/netcap/types"
)
func toIncomingConnsFiltered() {
resolverLog := zap.New(zapcore.NewNopCore())
defer func() {
err := resolverLog.Sync()
if err != nil {
log.Println(err)
}
}()
resolvers.SetLogger(resolverLog)
stdOut := os.Stdout
os.Stdout = os.Stderr
resolvers.InitLocalDNS()
resolvers.InitDNSWhitelist()
resolvers.InitServiceDB()
os.Stdout = stdOut
netmaltego.ConnectionTransform(
netmaltego.CountIncomingConnBytesFiltered,
func(lt maltego.LocalTransform, trx *maltego.Transform, conn *types.Connection, min, max uint64, path string, mac string, ipaddr string, top12 *[]int) {
if conn.DstIP == ipaddr {
name := resolvers.LookupDNSNameLocal(conn.SrcIP)
if name != "" {
if !resolvers.IsWhitelistedDomain(name) {
if isInTop12(conn.TotalSize, top12) {
addConnection(trx, conn, path, min, max, maltego.OutputToInput)
}
}
} else {
if isInTop12(conn.TotalSize, top12) {
addConnection(trx, conn, path, min, max, maltego.OutputToInput)
}
}
}
},
)
}
func isInTop12(val int32, sizes *[]int) bool {
for _, s := range *sizes {
if s == int(val) {
return true
}
}
return false
}