def craft_pfcp_session_modify_packet():
global peer_address, peer_seid
udp = scapy.UDP()
ip = scapy.IP()
ip.src = localaddr
ip.dst = peer_address
#fill pfcp header
pfcp_header = pfcp.PFCP()
pfcp_header.version = 1
pfcp_header.S = 1
pfcp_header.message_type = 52
pfcp_header.seid = peer_seid
pfcp_header.seq = 2
mod = pfcp.PFCPSessionModificationRequest()
fseid = pfcp.IE_FSEID()
fseid.v4 = 1
fseid.seid = 1
fseid.ipv4 = "1.1.1.1"
mod.IE_list.append(fseid)
far1 = pfcp.IE_UpdateFAR()
#FAR id
farid1 = pfcp.IE_FAR_Id()
farid1.id = 2
far1.IE_list.append(farid1)
#Apply Action
appAction1 = pfcp.IE_ApplyAction()
appAction1.FORW = 1
far1.IE_list.append(appAction1)
updforwarding = pfcp.IE_UpdateForwardingParameters()
destintf1 = pfcp.IE_DestinationInterface()
destintf1.interface = 0 #access
updforwarding.IE_list.append(destintf1)
outerHeader = pfcp.IE_OuterHeaderCreation()
outerHeader.GTPUUDPIPV4 = 1
outerHeader.ipv4 = ENODEB_IPV4
outerHeader.TEID = TEID
updforwarding.IE_list.append(outerHeader)
far1.IE_list.append(updforwarding)
mod.IE_list.append(far1)
udp = scapy.UDP()
ip = scapy.IP()
ip.src = localaddr
ip.dst = upfaddr
modify_pkt = ip / udp / pfcp_header / mod
return modify_pkt
def send_receive_message(final):
scapy.send(final)
data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
print("received message: %s" % data)
decoded_p1 = pfcp.PFCP()
decoded_p1.dissect(data)
if (decoded_p1.message_type == 6):
#this is setup response
for ie in decoded_p1.payload.IE_list:
if (ie.ie_type == 60):
decoded_node_type = ie
print("decoded node type : ")
elif (ie.ie_type == 19):
print("decoded cause : ", ie.cause)
elif (ie.ie_type == 96):
print("recovery timestamp received")
elif (ie.ie_type == 116):
print("decoded ip resource information received")
def craft_pfcp_session_delete_packet():
global peer_address, peer_seid
udp = scapy.UDP()
ip = scapy.IP()
ip.src = localaddr
ip.dst = peer_address
ip.dst = upfaddr
#fill pfcp header
pfcp_header = pfcp.PFCP()
pfcp_header.version = 1
pfcp_header.S = 1
pfcp_header.message_type = 54
pfcp_header.seid = peer_seid
pfcp_header.seq = 3
delete_pkt = ip / udp / pfcp_header
return delete_pkt
def craft_pfcp_association_setup_packet():
#create PFCP packet
pfcp_header = pfcp.PFCP()
#create setup request packet
setupreq = pfcp.PFCPAssociationSetupRequest()
setupreq.version = 1
#Let's add IEs into the message
ie1 = pfcp.IE_NodeId()
ie1.ipv4 = localaddr
setupreq.IE_list.append(ie1)
ie2 = pfcp.IE_RecoveryTimeStamp()
setupreq.IE_list.append(ie2)
udp = scapy.UDP()
ip = scapy.IP()
ip.src = localaddr
ip.dst = upfaddr
final = ip / udp / pfcp_header / setupreq
return final
def send_receive_pfcp_create_session_message(create_session_pkt):
create_session_pkt.show()
scapy.send(create_session_pkt)
data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
print("received message: %s" % data)
decoded_p1 = pfcp.PFCP()
decoded_p1.dissect(data)
decoded_p1.show()
if (decoded_p1.message_type == 51):
#this is setup response
for ie in decoded_p1.payload.IE_list:
if (ie.ie_type == 60):
decoded_node_type = ie
print("decoded node type : ")
elif (ie.ie_type == 19):
print("decoded cause : ", ie.cause)
elif (ie.ie_type == 57):
print("FSEID recieved ")
print("FSEID seid {} and ip address {} ", ie.seid, ie.ipv4)
global peer_address, peer_seid
peer_address = ie.ipv4
peer_seid = ie.seid
else:
print("Received packet {}", decoded_p1.message_type)
from scapy import all as scapy from scapy.contrib import pfcp udp = scapy.UDP() ip = scapy.IP() ip.src = "172.17.0.3" ip.dst = "192.168.84.222" #fill pfcp header pfcp_header = pfcp.PFCP() pfcp_header.version = 1 pfcp_header.S = 1 pfcp_header.message_type = 50 pfcp_header.seid = 0 pfcp_header.seq = 1 est = pfcp.PFCPSessionEstablishmentRequest() #add IEs into message nodeid = pfcp.IE_NodeId() nodeid.ipv4 = "172.17.0.3" #put self address est.IE_list.append(nodeid) fseid = pfcp.IE_FSEID() fseid.v4 = 1 fseid.seid = 1 fseid.ipv4 = "1.1.1.1" est.IE_list.append(fseid) pdn_type = pfcp.IE_PDNType() est.IE_list.append(pdn_type)
def craft_pfcp_session_est_packet():
#fill pfcp header
pfcp_header = pfcp.PFCP()
pfcp_header.version = 1
pfcp_header.S = 1
pfcp_header.message_type = 50
pfcp_header.seid = 0
pfcp_header.seq = 1
est = pfcp.PFCPSessionEstablishmentRequest()
#add IEs into message
nodeid = pfcp.IE_NodeId()
nodeid.ipv4 = localaddr
est.IE_list.append(nodeid)
fseid = pfcp.IE_FSEID()
fseid.v4 = 1
fseid.seid = 1
fseid.ipv4 = "1.1.1.1"
est.IE_list.append(fseid)
pdn_type = pfcp.IE_PDNType()
est.IE_list.append(pdn_type)
pdr1 = pfcp.IE_CreatePDR()
pdr1_id = pfcp.IE_PDR_Id()
pdr1_id.id = 1
pdr1.IE_list.append(pdr1_id)
priority1 = pfcp.IE_Precedence()
priority1.precedence = 2
pdr1.IE_list.append(priority1)
pdi1 = pfcp.IE_PDI()
#soure interface
si1 = pfcp.IE_SourceInterface()
si1.interface = 0
pdi1.IE_list.append(si1)
#F-TEID
fteid1 = pfcp.IE_FTEID()
fteid1.V4 = 1
fteid1.TEID = 255
fteid1.ipv4 = S1U_IPV4
pdi1.IE_list.append(fteid1)
#SDF filter
sdf1 = pfcp.IE_SDF_Filter()
sdf1.FD = 1
sdf1.flow_description = "0.0.0.0/0 0.0.0.0/0 0 : 65535 0 : 65535 0x0/0x0"
pdi1.IE_list.append(sdf1)
pdr1.IE_list.append(pdi1)
outerHdrRml1 = pfcp.IE_OuterHeaderRemoval()
outerHdrRml1.header = 0
pdr1.IE_list.append(outerHdrRml1)
farid1 = pfcp.IE_FAR_Id()
farid1.id = 1
pdr1.IE_list.append(farid1)
qerid1 = pfcp.IE_QER_Id()
qerid1.id = 1
pdr1.IE_list.append(qerid1)
est.IE_list.append(pdr1)
###
pdr2 = pfcp.IE_CreatePDR()
pdr2_id = pfcp.IE_PDR_Id()
pdr2_id.id = 2
pdr2.IE_list.append(pdr2_id)
priority2 = pfcp.IE_Precedence()
priority2.precedence = 2
pdr2.IE_list.append(priority2)
pdi2 = pfcp.IE_PDI()
#soure interface
si2 = pfcp.IE_SourceInterface()
si2.interface = 1
pdi2.IE_list.append(si2)
#network instance
ni = pfcp.IE_NetworkInstance()
ni.instance = "internetinternetinternetinterne"
pdi2.IE_list.append(ni)
#ue IP address
ueaddr = pfcp.IE_UE_IP_Address()
ueaddr.V4 = 1
ueaddr.ipv4 = UE_IPV4
pdi2.IE_list.append(ueaddr)
#SDF filter
sdf2 = pfcp.IE_SDF_Filter()
sdf2.FD = 1
sdf2.flow_description = "0.0.0.0/0 0.0.0.0/0 0 : 65535 0 : 65535 0x0/0x0"
pdi2.IE_list.append(sdf2)
pdr2.IE_list.append(pdi2)
farid2 = pfcp.IE_FAR_Id()
farid2.id = 2
pdr2.IE_list.append(farid2)
qerid2 = pfcp.IE_QER_Id()
qerid2.id = 2
pdr2.IE_list.append(qerid2)
est.IE_list.append(pdr2)
far1 = pfcp.IE_CreateFAR()
#fill far 1
#FAR id
farid1 = pfcp.IE_FAR_Id()
farid1.id = 1
far1.IE_list.append(farid1)
#Apply Action
appAction1 = pfcp.IE_ApplyAction()
appAction1.FORW = 1
far1.IE_list.append(appAction1)
#Forwarding Parameters
forwardParam1 = pfcp.IE_ForwardingParameters()
destintf1 = pfcp.IE_DestinationInterface()
destintf1.interface = 1 #core
forwardParam1.IE_list.append(destintf1)
far1.IE_list.append(forwardParam1)
est.IE_list.append(far1)
far2 = pfcp.IE_CreateFAR()
#fill far 2
#FAR id
farid2 = pfcp.IE_FAR_Id()
farid2.id = 2
far2.IE_list.append(farid2)
#Apply Action
appAction2 = pfcp.IE_ApplyAction()
appAction2.FORW = 1
far2.IE_list.append(appAction2)
#Forwarding Parameters
forwardParam2 = pfcp.IE_ForwardingParameters()
destintf2 = pfcp.IE_DestinationInterface()
destintf2.interface = 0 #access
forwardParam2.IE_list.append(destintf2)
far2.IE_list.append(forwardParam2)
est.IE_list.append(far2)
qer1 = pfcp.IE_CreateQER()
#QER ID
qerid1 = pfcp.IE_QER_Id()
qerid1.id = 1
qer1.IE_list.append(qerid1)
#Gate STtus
gate1 = pfcp.IE_GateStatus()
qer1.IE_list.append(gate1)
#MBR
mbr1 = pfcp.IE_MBR()
mbr1.dl = 12345678
mbr1.ul = 12345678
qer1.IE_list.append(mbr1)
#GBR
gbr1 = pfcp.IE_GBR()
gbr1.dl = 12345678
gbr1.ul = 12345678
qer1.IE_list.append(gbr1)
est.IE_list.append(qer1)
qer2 = pfcp.IE_CreateQER()
#QER ID
qerid2 = pfcp.IE_QER_Id()
qerid2.id = 1
qer2.IE_list.append(qerid2)
#Gate STtus
gate2 = pfcp.IE_GateStatus()
qer2.IE_list.append(gate2)
#MBR
mbr2 = pfcp.IE_MBR()
mbr2.dl = 12345678
mbr2.ul = 12345678
qer2.IE_list.append(mbr2)
#GBR
gbr2 = pfcp.IE_GBR()
gbr1.dl = 12345678
gbr1.ul = 12345678
qer2.IE_list.append(gbr2)
est.IE_list.append(qer2)
udp = scapy.UDP()
ip = scapy.IP()
ip.src = localaddr
ip.dst = upfaddr
final = ip / udp / pfcp_header / est
return final