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new: implemented dns packet parser

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This commit is contained in:
evilsocket 2018-01-10 02:26:18 +01:00
commit 27b1f48584
5 changed files with 79 additions and 37 deletions
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68
modules/net_sniff_parsers.go
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@ -10,46 +10,56 @@ import (
"github.com/google/gopacket/layers"
)
func tcpParser(ip *layers.IPv4, pkt gopacket.Packet) {
func tcpParser(ip *layers.IPv4, pkt gopacket.Packet, verbose bool) {
tcp := pkt.Layer(layers.LayerTypeTCP).(*layers.TCP)
if sniParser(ip, pkt, tcp) {
return
}
fmt.Printf("[%s] %s %s:%s > %s:%s %s\n",
vTime(pkt.Metadata().Timestamp),
core.W(core.BG_LBLUE+core.FG_BLACK, "tcp"),
vIP(ip.SrcIP),
vPort(tcp.SrcPort),
vIP(ip.DstIP),
vPort(tcp.DstPort),
core.Dim(fmt.Sprintf("%d bytes", len(ip.Payload))))
if verbose == true {
fmt.Printf("[%s] %s %s:%s > %s:%s %s\n",
vTime(pkt.Metadata().Timestamp),
core.W(core.BG_LBLUE+core.FG_BLACK, "tcp"),
vIP(ip.SrcIP),
vPort(tcp.SrcPort),
vIP(ip.DstIP),
vPort(tcp.DstPort),
core.Dim(fmt.Sprintf("%d bytes", len(ip.Payload))))
}
}
func udpParser(ip *layers.IPv4, pkt gopacket.Packet) {
func udpParser(ip *layers.IPv4, pkt gopacket.Packet, verbose bool) {
udp := pkt.Layer(layers.LayerTypeUDP).(*layers.UDP)
fmt.Printf("[%s] %s %s:%s > %s:%s %s\n",
vTime(pkt.Metadata().Timestamp),
core.W(core.BG_DGRAY+core.FG_WHITE, "udp"),
vIP(ip.SrcIP),
vPort(udp.SrcPort),
vIP(ip.DstIP),
vPort(udp.DstPort),
core.Dim(fmt.Sprintf("%d bytes", len(ip.Payload))))
if dnsParser(ip, pkt, udp) {
return
}
if verbose == true {
fmt.Printf("[%s] %s %s:%s > %s:%s %s\n",
vTime(pkt.Metadata().Timestamp),
core.W(core.BG_DGRAY+core.FG_WHITE, "udp"),
vIP(ip.SrcIP),
vPort(udp.SrcPort),
vIP(ip.DstIP),
vPort(udp.DstPort),
core.Dim(fmt.Sprintf("%d bytes", len(ip.Payload))))
}
}
func unkParser(ip *layers.IPv4, pkt gopacket.Packet) {
fmt.Printf("[%s] [%s] %s > %s (%d bytes)\n",
vTime(pkt.Metadata().Timestamp),
pkt.TransportLayer().LayerType(),
vIP(ip.SrcIP),
vIP(ip.DstIP),
len(ip.Payload))
func unkParser(ip *layers.IPv4, pkt gopacket.Packet, verbose bool) {
if verbose == true {
fmt.Printf("[%s] [%s] %s > %s (%d bytes)\n",
vTime(pkt.Metadata().Timestamp),
pkt.TransportLayer().LayerType(),
vIP(ip.SrcIP),
vIP(ip.DstIP),
len(ip.Payload))
}
}
func mainParser(pkt gopacket.Packet) bool {
func mainParser(pkt gopacket.Packet, verbose bool) bool {
nlayer := pkt.NetworkLayer()
if nlayer == nil {
log.Warning("Missing network layer skipping packet.")
@ -70,11 +80,11 @@ func mainParser(pkt gopacket.Packet) bool {
}
if tlayer.LayerType() == layers.LayerTypeTCP {
tcpParser(ip, pkt)
tcpParser(ip, pkt, verbose)
} else if tlayer.LayerType() == layers.LayerTypeUDP {
udpParser(ip, pkt)
udpParser(ip, pkt, verbose)
} else {
unkParser(ip, pkt)
unkParser(ip, pkt, verbose)
}
return true