def author(controller_path, cfg):
ubitname = raw_input("UBIT Name: ")
link_costs = [
('1', '2', 3),
('1', '3', 1),
('1', '4', 7),
('2', '4', 2),
('4', '5', 2),
('4', '3', 1),
('5', '2', 6),
]
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port)
for router in ROUTERS:
success = False
utils.run_cmd([controller_path, '-t', 'topology', '-a', str(router.id), '-o', 'response.pkt'])
try:
with open('response.pkt', 'r') as f:
header = struct.unpack('!4sBBH', f.read(8))
controller_ip, cntrl_code, resp_code, payload_len = utils.parse_response_header(header)
payload = f.read(payload_len)
os.system('hexdump -C response.pkt')
if payload == 'I, '+ubitname+', have read and understood the course academic integrity policy.':
success = True
except:
success = False
remote_api.cleanup(cfg)
utils.cleanup()
print success
def grade_data(controller_path, link_costs, pass_stats, pass_file, pass_fail, expected_path_success, expected_path_fail, init_ttl_success, init_ttl_fail, src, dst, cfg):
score = 0.0
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port, scramble=True)
init_ttl = init_ttl_success
transfer_id = random.randint(1,100)
init_seq_num = random.randint(1,100)
filename = 'testfile1'
# Move file on src router
remote_api.copy_file_to(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src]), ROUTERS), filename, filename)
# Remove file on dst router (if it exists)
remote_api.delete_file_from(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[dst]), ROUTERS), 'file-*')
# INIT
utils.run_cmd([controller_path, '-t', 'topology', '-i', '1', '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
sleep(2)
# Do File Transfer
remote_api.run_cmd(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src]), ROUTERS), 'chmod 777 '+filename)
utils.run_cmd([controller_path, '-t', 'topology', '-f', ROUTER_ID_MAPPING[src], ROUTER_ID_MAPPING[dst], str(init_ttl), str(transfer_id), str(init_seq_num), filename, '-o', 'response.pkt'])
sleep(8)
# Checks File stats/meta
expected_path = expected_path_success
if check_file_transfer(controller_path, init_ttl, transfer_id, init_seq_num, filename, expected_path, ROUTER_ID_MAPPING): score += pass_stats
# Check File itself
if compare_files(cfg, filename, utils.get_router_ip(int(ROUTER_ID_MAPPING[dst]), ROUTERS), 'file-'+str(transfer_id)): score += pass_file
init_ttl = init_ttl_fail
transfer_id = random.randint(1,100)
init_seq_num = random.randint(1,100)
filename = 'testfile2'
# Move file on src router
remote_api.copy_file_to(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src]), ROUTERS), filename, filename)
# Remove file on dst router (if it exists)
remote_api.delete_file_from(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[dst]), ROUTERS), 'file-*')
# Do File Transfer
remote_api.run_cmd(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src]), ROUTERS), 'chmod 777 '+filename)
utils.run_cmd([controller_path, '-t', 'topology', '-f', ROUTER_ID_MAPPING[src], ROUTER_ID_MAPPING[dst], str(init_ttl), str(transfer_id), str(init_seq_num), filename, '-o', 'response.pkt'])
sleep(8)
# Checks File stats/meta and File Transfer failure
expected_path = expected_path_fail
if check_file_transfer(controller_path, init_ttl, transfer_id, init_seq_num, filename, expected_path, ROUTER_ID_MAPPING) and not (compare_files(cfg, filename, utils.get_router_ip(int(ROUTER_ID_MAPPING[dst]), ROUTERS), 'file-'+str(transfer_id))):
score += pass_fail
remote_api.cleanup(cfg)
utils.cleanup()
return score
def grade_update(controller_path, link_costs, link_update, updated_link_costs, cfg):
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port)
utils.run_cmd([controller_path, '-t', 'topology', '-i', '1', '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
sleep(3)
utils.run_cmd([controller_path, '-t', 'topology', '-u', ROUTER_ID_MAPPING[link_update[0]], ROUTER_ID_MAPPING[link_update[1]], str(link_update[2]), '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
sleep(3)
success = False
for src in ROUTERS:
success = False
utils.run_cmd([controller_path, '-t', 'topology', '-r', str(src.id), '-o', 'response.pkt'])
try:
with open('response.pkt', 'r') as f:
header = struct.unpack('!4sBBH', f.read(8))
controller_ip, cntrl_code, resp_code, payload_len = utils.parse_response_header(header)
payload = f.read(payload_len)
os.system('hexdump -C response.pkt')
if payload_len != len(ROUTERS)*8: break
r_table = parse_routing_table(payload)
#Build expected routing table
expected_r_table = []
for dst in ROUTERS:
expected_cost, nxt_hop = get_shortest_path(ROUTER_ID_MAPPING[str(src.id)], ROUTER_ID_MAPPING[str(dst.id)], updated_link_costs, ROUTER_ID_MAPPING)
if expected_cost == 65535: nxt_hop = 65535
expected_r_table.append( [dst.id, nxt_hop, expected_cost] )
if cmp(sorted(r_table), sorted(expected_r_table)) == 0: success = True
else:
success = False
break
except:
success = False
break
utils.delete_file('response.pkt') #cleanup
remote_api.cleanup(cfg)
utils.cleanup()
return success
def grade_bonus(controller_path, link_costs, src, dst, init_ttls, file_list, expected_path, cfg):
score = 0.0
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port, scramble=True)
transfer_ids = []
init_seq_nums = []
for index in range(len(file_list)):
transfer_ids.append(random.randint(1,100))
init_seq_nums.append(random.randint(1,100))
# Move file on src router
remote_api.copy_file_to(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src[index]]), ROUTERS), file_list[index], file_list[index])
remote_api.run_cmd(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[src[index]]), ROUTERS), 'chmod 777 '+file_list[index])
# Remove file on dst router (if it exists)
remote_api.delete_file_from(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING[dst[index]]), ROUTERS), 'file-*')
# INIT
utils.run_cmd([controller_path, '-t', 'topology', '-i', '1', '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
sleep(2)
# Do File Transfer
init_multi_file_transfer(controller_path, src, dst, init_ttls, transfer_ids, init_seq_nums, file_list, ROUTER_ID_MAPPING)
sleep(8)
os.system('rm multi_run_script')
for index in range(len(file_list)):
# Checks File stats/meta
if check_file_transfer(controller_path, init_ttls[index], transfer_ids[index], init_seq_nums[index], file_list[index], expected_path[index], ROUTER_ID_MAPPING, multi=True):
score += 10.0
# Check File itself
if compare_files(cfg, file_list[index], utils.get_router_ip(int(ROUTER_ID_MAPPING[dst[index]]), ROUTERS), 'file-'+str(transfer_ids[index])):
score += 10.0
remote_api.cleanup(cfg)
utils.cleanup()
if score == len(file_list)*20: return True
else: return False
def crash(controller_path, cfg):
score = 0.0
link_costs = [
('1', '2', 1),
('2', '3', 1),
('3', '4', 1),
('4', '5', 1)
]
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port, scramble=True)
utils.run_cmd([controller_path, '-t', 'topology', '-i', '1', '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
sleep(3)
nonce = random.randint(100,1000)
utils.run_cmd([controller_path, '-t', 'topology', '-a', ROUTER_ID_MAPPING['1'], '-o', 'response-author-'+str(nonce)+'.pkt'])
before_author = False
if os.path.isfile('response-author-'+str(nonce)+'.pkt'):
before_author = True
# Crash router
utils.run_cmd([controller_path, '-t', 'topology', '-c', ROUTER_ID_MAPPING['1'], '-o', 'response.pkt'])
os.system('rm response.pkt*') #cleanup
nonce = random.randint(100,1000)
utils.run_cmd([controller_path, '-t', 'topology', '-a', ROUTER_ID_MAPPING['1'], '-o', 'response-author-'+str(nonce)+'.pkt'])
after_author = False
if os.path.isfile('response-author-'+str(nonce)+'.pkt'):
after_author = True
if before_author and (not after_author): score += 5.0
sleep(4)
utils.run_cmd([controller_path, '-t', 'topology', '-r', ROUTER_ID_MAPPING['3'], '-o', 'response.pkt'])
before_cost = None
try:
with open('response.pkt', 'r') as f:
header = struct.unpack('!4sBBH', f.read(8))
controller_ip, cntrl_code, resp_code, payload_len = utils.parse_response_header(header)
payload = f.read(payload_len)
os.system('hexdump -C response.pkt')
if payload_len == len(ROUTERS)*8:
r_table = parse_routing_table(payload)
for entry in r_table:
if entry[0] == int(ROUTER_ID_MAPPING['1']): before_cost = entry[2]
except: pass
sleep(2)
utils.run_cmd([controller_path, '-t', 'topology', '-r', ROUTER_ID_MAPPING['3'], '-o', 'response.pkt'])
after_cost = None
try:
with open('response.pkt', 'r') as f:
header = struct.unpack('!4sBBH', f.read(8))
controller_ip, cntrl_code, resp_code, payload_len = utils.parse_response_header(header)
payload = f.read(payload_len)
os.system('hexdump -C response.pkt')
if payload_len == len(ROUTERS)*8:
r_table = parse_routing_table(payload)
for entry in r_table:
if entry[0] == int(ROUTER_ID_MAPPING['1']): after_cost = entry[2]
except: pass
if before_cost and after_cost and (after_cost > before_cost): score += 5.0
os.system('rm response-author*') #cleanup
remote_api.cleanup(cfg)
utils.cleanup()
print score
def rupdates(controller_path, cfg):
score = 0.0
link_costs = [
('1', '2', 3)
]
cntrl_port = utils.random_port()
remote_api.init_remote_assignment(cfg, cntrl_port)
ROUTERS, ROUTER_ID_MAPPING = utils.gen_topology(link_costs, cntrl_port)
utils.run_cmd([controller_path, '-t', 'topology', '-i', '2', '-o' 'response.pkt'])
os.system('rm response.pkt*') #cleanup
if hasattr(sys, '_MEIPASS'): base_path = sys._MEIPASS
else: base_path = os.path.abspath('.')
packet_receiver_path = os.path.join(base_path, 'packet_receiver.py')
# Neighbor
remote_api.kill_process(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING['2']), ROUTERS), ROUTERS[1].control_port)
remote_api.run_script(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING['2']), ROUTERS), str(ROUTERS[1].router_port)+' 4 '+remote_api.ASSIGNMENT_PATH, packet_receiver_path)
# Non-Neighbor
remote_api.kill_process(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING['3']), ROUTERS), ROUTERS[2].control_port)
remote_api.run_script(cfg, utils.get_router_ip(int(ROUTER_ID_MAPPING['3']), ROUTERS), str(ROUTERS[2].router_port)+' 4 '+remote_api.ASSIGNMENT_PATH, packet_receiver_path)
sleep(4)
os.system('rm -f num_updates*')
os.system('rm -f update-packet-*')
# Check neighbor
check = False
remote_api.copy_file_from(cfg, ROUTERS[1].ip_addr, 'num_updates', 'num_updates_neighbor')
if os.path.isfile('num_updates_neighbor'):
check = True
score += 2.5
# Check non-neighbor
if check:
os.system('rm -f num_updates_non-neighbor')
remote_api.copy_file_from(cfg, ROUTERS[2].ip_addr, 'num_updates', 'num_updates_non-neighbor')
if not os.path.isfile('num_updates_non-neighbor'): score += 2.5
with open('num_updates_neighbor', 'r') as f:
num_updates = int(f.read())
if num_updates == 2 or num_updates == 3: score += 5.0
remote_api.copy_file_from(cfg, ROUTERS[1].ip_addr, os.path.join(remote_api.ASSIGNMENT_PATH, 'update-packet-'+str(num_updates-1)), './')
with open('update-packet-'+str(num_updates-1), 'rb') as f:
pkt = f.read()
num_updates, src_router_port, src_router_ip = struct.unpack('!HH4s', pkt[:8])
updates = []
pkt = pkt[8:]
if len(pkt) == num_updates*12:
for index in range(num_updates):
updates.append(struct.unpack('!4sHHHH', pkt[index*12:(index*12)+12]))
# Build expected updates
expected_updates = []
for router in ROUTERS:
cost = 65535
if router.id == 1: cost = 0
if router.id == 2: cost = 3
update = (socket.inet_aton(router.ip_addr), router.router_port, 0, router.id, cost)
expected_updates.append(update)
if (num_updates == 5) and (src_router_port == ROUTERS[0].router_port) and (src_router_ip == socket.inet_aton(ROUTERS[0].ip_addr)) and (cmp(sorted(updates), sorted(expected_updates)) == 0):
score += 5.0
os.system('rm -f num_updates*')
os.system('rm -f update-packet-*')
remote_api.cleanup(cfg)
utils.cleanup()
print score