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headers.py
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#!/usr/bin/env python2
from __future__ import print_function
from scapy.all import get_if_list, bind_layers
from scapy.all import Packet, Raw
from scapy.all import IP
from scapy.fields import *
PROTO_RAW_PROGRAM = 0x8F
PROTO_PROGRAM = 0x90
PROTO_STORE_REQUEST = 0x91
PROTO_LOAD_REQUEST = 0x92
PROTO_LOAD_RESPONSE = 0x93
MAX_PROGRAM_LENGTH = 300
LOAD_BALANCER_IP = '10.255.255.0'
LOAD_BALANCER_MAC = '00:00:ff:00:00:00'
DATASTORE_IP = '10.255.255.1'
DATASTORE_MAC = '00:00:ff:00:00:01'
def get_if():
ifs = get_if_list()
iface = [i for i in get_if_list() if "eth0" in i]
if not iface:
print("Cannot find eth0 interface")
exit(1)
return iface[0]
class ProgramMetadata(Packet):
name = 'ProgramMetadata'
fields_desc = [
BitField('max_steps', 0, 32),
]
class ProgramExecutionMetadata(Packet):
name = 'ProgramExecutionMetadata'
fields_desc = [
BitField('src_port', 0, 9),
BitField('reserved', 0, 7),
BitField('src_mac', 0, 48),
BitField('src_ipv4', 0, 32),
BitField('pc', 0, 32),
BitField('steps', 0, 32),
BitField('mem_namespace', 0, 32),
]
class StoreRequestMetadata(Packet):
name = 'StoreRequestMetadata'
fields_desc = [
BitField('address', 0, 32),
BitField('value', 0, 32),
BitField('execution_node', 0, 32),
]
class LoadRequestMetadata(Packet):
name = 'LoadRequestMetadata'
fields_desc = [
BitField('address', 0, 32),
BitField('register', 0, 5),
BitField('reserved', 0, 3),
BitField('execution_node', 0, 32),
]
class LoadResponseMetadata(Packet):
name = 'LoadResponseMetadata'
fields_desc = [
BitField('value', 0, 32),
BitField('register', 0, 5),
BitField('reserved', 0, 3),
BitField('execution_node', 0, 32),
]
class Registers(Packet):
name = 'Registers'
fields_desc = [
IntField('r0', 0),
IntField('r1', 0),
IntField('r2', 0),
IntField('r3', 0),
IntField('r4', 0),
IntField('r5', 0),
IntField('r6', 0),
IntField('r7', 0),
IntField('r8', 0),
IntField('r9', 0),
IntField('r10', 0),
IntField('r11', 0),
IntField('r12', 0),
IntField('r13', 0),
IntField('r14', 0),
IntField('r15', 0),
IntField('r16', 0),
IntField('r17', 0),
IntField('r18', 0),
IntField('r19', 0),
IntField('r20', 0),
IntField('r21', 0),
IntField('r22', 0),
IntField('r23', 0),
IntField('r24', 0),
IntField('r25', 0),
IntField('r26', 0),
IntField('r27', 0),
IntField('r28', 0),
IntField('r29', 0),
IntField('r30', 0),
IntField('r31', 0),
]
class Instruction(Packet):
name = 'Instruction'
fields_desc = [
BitField('funct7', 0, 7),
BitField('part1', 0, 5),
BitField('part2', 0, 5),
BitField('funct3', 0, 3),
BitField('part3', 0, 5),
BitField('opcode', 0, 7),
]
def AddI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b000, part3=dst, opcode=0b0010011, **kwargs)
def Add(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b000, part3=dst, opcode=0b0110011, **kwargs)
def Sub(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0100000, part1=target, part2=src, funct3=0b000, part3=dst, opcode=0b0110011, **kwargs)
def Mul(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000001, part1=target, part2=src, funct3=0b000, part3=dst, opcode=0b0110011, **kwargs)
def SllI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=0b0000000, part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b001, part3=dst, opcode=0b0010011, **kwargs)
def Sll(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b001, part3=dst, opcode=0b0110011, **kwargs)
def SrlI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=0b0000000, part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b101, part3=dst, opcode=0b0010011, **kwargs)
def Srl(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b101, part3=dst, opcode=0b0110011, **kwargs)
def SraI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=0b0100000, part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b101, part3=dst, opcode=0b0010011, **kwargs)
def Sra(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0100000, part1=target, part2=src, funct3=0b101, part3=dst, opcode=0b0110011, **kwargs)
def AndI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b111, part3=dst, opcode=0b0010011, **kwargs)
def And(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b111, part3=dst, opcode=0b0110011, **kwargs)
def OrI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b110, part3=dst, opcode=0b0010011, **kwargs)
def Or(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b110, part3=dst, opcode=0b0110011, **kwargs)
def XorI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b100, part3=dst, opcode=0b0010011, **kwargs)
def Xor(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b100, part3=dst, opcode=0b0110011, **kwargs)
def Lui(dst=0, imm=0, **kwargs):
return Instruction(funct7=imm >> 13, part1=(((1 << 5) - 1) & (imm >> 8)), part2=(((1 << 5) - 1) & (imm >> 3)), funct3=(((1 << 3) - 1) & imm), part3=dst, opcode=0b0110111, **kwargs)
def Auipc(dst=0, imm=0, **kwargs):
return Instruction(funct7=imm >> 13, part1=(((1 << 5) - 1) & (imm >> 8)), part2=(((1 << 5) - 1) & (imm >> 3)), funct3=(((1 << 3) - 1) & imm), part3=dst, opcode=0b0010111, **kwargs)
def SltI(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b010, part3=dst, opcode=0b0010011, **kwargs)
def Slt(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b010, part3=dst, opcode=0b0110011, **kwargs)
def SltIu(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b011, part3=dst, opcode=0b0010011, **kwargs)
def Sltu(dst=0, src=0, target=0, **kwargs):
return Instruction(funct7=0b0000000, part1=target, part2=src, funct3=0b011, part3=dst, opcode=0b0110011, **kwargs)
def Sw(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=src, part2=dst, funct3=0b010, part3=(((1 << 5) - 1) & imm), opcode=0b0100011, **kwargs)
def Lw(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b010, part3=dst, opcode=0b0000011, **kwargs)
def Jal(dst=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 20) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
part2=((imm >> 15) & ((1 << 5) - 1)),
funct3=((imm >> 12) & ((1 << 3) - 1)),
part3=dst,
opcode=0b1101111, **kwargs)
def Jr(src=0, **kwargs):
return Jalr(dst=0, src=src, imm=0, **kwargs)
def Jalr(dst=0, src=0, imm=0, **kwargs):
return Instruction(funct7=(imm >> 5), part1=(((1 << 5) - 1) & imm), part2=src, funct3=0b000, part3=dst, opcode=0b1100111, **kwargs)
def Beq(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b000,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Bne(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b001,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Blt(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b100,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Bge(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b101,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Bltu(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b110,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Bgeu(src=0, target=0, imm=0, **kwargs):
return Instruction(funct7=(((imm >> 12) << 6) | ((imm >> 5) & ((1 << 6) - 1))),
part1=target, part2=src, funct3=0b111,
part3=((((imm >> 1) << 1) & ((1 << 5) - 1)) | ((imm >> 11) & ((1 << 1) - 1))),
opcode=0b1100011, **kwargs)
def Nop(**kwargs):
return AddI(dst=0, src=0, imm=0, **kwargs)
def EndOfProgram(**kwargs):
return Instruction(funct7=-1, part1=-1, part2=-1, funct3=-1, part3=-1, opcode=-1, **kwargs)
def make_program(pkt, insns):
pkt /= ProgramMetadata(max_steps=1000)
pkt /= Registers()
assert len(insns) < MAX_PROGRAM_LENGTH
for insn in insns:
pkt /= insn
pkt /= EndOfProgram()
return pkt
bind_layers(IP, ProgramMetadata, proto=PROTO_RAW_PROGRAM)
bind_layers(IP, ProgramExecutionMetadata, proto=PROTO_PROGRAM)
bind_layers(IP, StoreRequestMetadata, proto=PROTO_STORE_REQUEST)
bind_layers(IP, LoadRequestMetadata, proto=PROTO_LOAD_REQUEST)
bind_layers(IP, LoadResponseMetadata, proto=PROTO_LOAD_RESPONSE)
bind_layers(StoreRequestMetadata, ProgramExecutionMetadata)
bind_layers(LoadRequestMetadata, ProgramExecutionMetadata)
bind_layers(LoadResponseMetadata, ProgramExecutionMetadata)
bind_layers(ProgramExecutionMetadata, ProgramMetadata)
bind_layers(ProgramMetadata, Registers)
bind_layers(Registers, Instruction)
bind_layers(Instruction, Instruction)
# Increase default recursion depth so scapy can handle longer programs
sys.setrecursionlimit(30000)