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new: new net.probe.upnp agent

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evilsocket 2018-09-09 13:12:04 +03:00
commit 42c71845ed
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3 changed files with 83 additions and 0 deletions
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52
packets/upnp.go Normal file
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package packets
import (
"fmt"
"net"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
)
const (
UPNPPort = 1900
)
var (
UPNPDestMac = net.HardwareAddr{0x01, 0x00, 0x5e, 0x00, 0x00, 0xfb}
UPNPDestIP = net.ParseIP("239.255.255.250")
)
func NewUPNPProbe(from net.IP, from_hw net.HardwareAddr) (error, []byte) {
eth := layers.Ethernet{
SrcMAC: from_hw,
DstMAC: UPNPDestMac,
EthernetType: layers.EthernetTypeIPv4,
}
ip4 := layers.IPv4{
Protocol: layers.IPProtocolUDP,
Version: 4,
TTL: 64,
SrcIP: from,
DstIP: UPNPDestIP,
}
udp := layers.UDP{
SrcPort: layers.UDPPort(12345),
DstPort: layers.UDPPort(UPNPPort),
}
payload := []byte("M-SEARCH * HTTP/1.1\r\n" +
fmt.Sprintf("Host: %s:%d\r\n", UPNPDestIP, UPNPPort) +
"Man: ssdp:discover\r\n" +
"ST: ssdp:all\r\n" +
"MX: 2\r\n" +
"\r\n")
if err := udp.SetNetworkLayerForChecksum(&ip4); err != nil {
return err, nil
}
return Serialize(&eth, &ip4, &udp, gopacket.Payload(payload))
}