def translate_addr_rule(addr, addr_type, addr_table, port_op, port_from,
port_to, proto, addr_iface, af):
"""Parses fields given in the pfweb form to a pf.PFRuleAddr object"""
pfaddr = False
if addr_type == "addrmask" and af != socket.AF_UNSPEC:
# Validate IP address
pfaddr = translate_addrmask(af, addr)
elif addr_type == "table":
# Set addr to a table
if not addr_table:
return "Table cannot be empty"
pfaddr = pf.PFAddr("<{}>".format(addr_table))
elif addr_type == "dynif":
# Set addr to an interface
if not addr_iface:
return "Interface cannot be empty"
pfaddr = pf.PFAddr("({})".format(addr_iface), af)
# Do not set if ANY or proto is ICMP
port = False
if int(
port_op
) != pf.PF_OP_NONE and proto != socket.IPPROTO_ICMP and proto != socket.IPPROTO_ICMPV6:
# Confirm port op
if int(port_op) not in PFWEB_PORT_OPS:
return "Invalid port op"
# port from
pfport_from = 0
try:
# Confirm input is a number
if port_from != '':
pfport_from = int(port_from)
except ValueError:
return "Invalid port number"
pfport_to = 0
# Set range
if int(port_op) == pf.PF_OP_RRG or int(port_op) == pf.PF_OP_IRG or int(
port_op) == pf.PF_OP_XRG:
# Port to
try:
if port_to != '':
pfport_to = int(port_to)
except ValueError:
return "Invalid port number"
port = pf.PFPort((pfport_from, pfport_to), proto, int(port_op))
# Create and set the PFRuleAddr
rule_addr = pf.PFRuleAddr()
if pfaddr:
rule_addr.addr = pfaddr
if port:
rule_addr.port = port
return rule_addr
def pfDrop(IP):
import pf
import socket
filter = pf.PacketFilter()
blockip = pf.PFAddr(IP)
try:
filter.enable()
ext_if = pf.PFAddr(type=pf.PF_ADDR_DYNIFTL, ifname=options.interface)
ruling = pf.PFRule(action=pf.PF_DROP,
direction=pf.PF_IN,
af=socket.AF_INET,
quick=True,
src=pf.PFRuleAddr(blockip))
#rs = pf.PFRuleset()
rs = filter.get_ruleset()
rs.append(ruling)
# Load rules
#filter = pf.PacketFilter()
filter.load_ruleset(rs)
except:
print "Unexpected error (pf):", sys.exc_info()[0]
return
def test_load_ruleset(self):
iface = pf.PFAddr(type=pf.PF_ADDR_DYNIFTL, ifname=self.testif)
tables = [pf.PFTable("web_srv", "10.0.1.20", "10.0.1.21", "10.0.1.22")]
rules = [
# match out on $ifname inet from !($ifname) to any nat-to ($ifname)
pf.PFRule(action=pf.PF_MATCH,
direction=pf.PF_OUT,
ifname=self.testif,
af=AF_INET,
src=pf.PFRuleAddr(iface, neg=True),
nat=pf.PFPool(pf.PF_POOL_NAT, iface)),
# pass out quick
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_OUT,
quick=True,
flags="S", flagset="SA",
keep_state=pf.PF_STATE_NORMAL),
# anchor "test_anchor"
pf.PFRuleset("test_anchor"),
# pass in on $ifname inet proto tcp from any to $ifname port ssh
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_IN,
ifname=self.testif,
af=AF_INET,
proto=IPPROTO_TCP,
dst=pf.PFRuleAddr(iface, pf.PFPort("ssh", IPPROTO_TCP)),
flags="S", flagset="SA",
keep_state=pf.PF_STATE_NORMAL),
# pass in on $ifname inet proto tcp to $ifname port www \
# rdr-to <web_srv> round-robin sticky-address
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_IN,
ifname=self.testif,
af=AF_INET,
proto=IPPROTO_TCP,
dst=pf.PFRuleAddr(iface, pf.PFPort("www", IPPROTO_TCP)),
flags="S", flagset="SA",
keep_state=pf.PF_STATE_NORMAL,
rdr=pf.PFPool(pf.PF_POOL_RDR, pf.PFAddr("<web_srv>"),
opts=(pf.PF_POOL_ROUNDROBIN|
pf.PF_POOL_STICKYADDR))),
# pass out on $ifname inet proto tcp to port 80 \
# divert-packet port 700
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_OUT,
ifname=self.testif,
af=AF_INET,
proto=IPPROTO_TCP,
dst=pf.PFRuleAddr(port=pf.PFPort("www", IPPROTO_TCP)),
divert=pf.PFDivert(pf.PF_DIVERT_PACKET, port=700)),
# pass in inet proto icmp all icmp-type echoreq max-pkt-rate 100/10
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_IN,
af=AF_INET,
proto=IPPROTO_ICMP,
type=pf.ICMP_ECHO+1,
keep_state=pf.PF_STATE_NORMAL,
pktrate=pf.PFThreshold(100, 10))]
rules[2].append(
pf.PFTable("spammers", flags=pf.PFR_TFLAG_PERSIST),
# pass in on $ifname inet proto tcp from ! <spammers> \
# to $ifname port 25 rdr-to 10.0.1.23
pf.PFRule(action=pf.PF_PASS,
direction=pf.PF_IN,
ifname=self.testif,
af=AF_INET,
proto=IPPROTO_TCP,
src=pf.PFRuleAddr(pf.PFAddr("<spammers>"), neg=True),
dst=pf.PFRuleAddr(iface, pf.PFPort(25, IPPROTO_TCP)),
flags="S", flagset="SA",
keep_state=pf.PF_STATE_NORMAL,
rdr=pf.PFPool(pf.PF_POOL_RDR, pf.PFAddr("10.0.1.23"))))
self.pf.clear_rules()
rs = pf.PFRuleset()
rs.append(*tables)
rs.append(*rules)
self.pf.load_ruleset(rs)
self.assertEqual(len(self.pf.get_ruleset().rules), len(rules))
def states():
"""Show all contents of the state table and allow a state to be removed"""
if request.method == 'POST':
# Remove individual state
if request.form.get('action') == 'remove':
# Make sure correct parameters were sent
if request.form.get('src') and request.form.get('dst'):
if '[' in request.form.get(
'src') or '.' not in request.form.get('src'):
# Handle IPv6 addresses
src_addr_port = request.form.get('src').split('[')
dst_addr_port = request.form.get('dst').split('[')
# Make sure there was a port set
if len(src_addr_port) == 2:
src_addr_port[1] = src_addr_port[1].split(']')[0]
else:
src_addr_port.append(0)
if len(dst_addr_port) == 2:
dst_addr_port[1] = dst_addr_port[1].split(']')[0]
else:
dst_addr_port.append(0)
else:
# IPv4 address and port
src_addr_port = request.form.get('src').split(':')
dst_addr_port = request.form.get('dst').split(':')
# Create PFRuleAddr object from address and ports
src_addr = pf.PFRuleAddr(
pf.PFAddr(src_addr_port[0]),
pf.PFPort(src_addr_port[1], 0, pf.PF_OP_EQ))
dst_addr = pf.PFRuleAddr(
pf.PFAddr(dst_addr_port[0]),
pf.PFPort(dst_addr_port[1], 0, pf.PF_OP_EQ))
packetfilter.kill_states(src=src_addr, dst=dst_addr)
# Return a JSON object of just the src and dst we removed
return jsonify({
'src': "{}".format(request.form.get('src')),
'dst': "{}".format(request.form.get('dst'))
})
else:
# Return a simple 400 response when src or dst were not provided
message = {'status': 400, 'message': 'Invalid parameters'}
resp = jsonify(message)
resp.status_code = 400
return resp
else:
# Return a simple 400 response the wrong action provided
message = {'status': 400, 'message': 'Unknown action'}
resp = jsonify(message)
resp.status_code = 400
return resp
states = list()
for state in packetfilter.get_states():
# Set direction for src and dst
(src, dst) = (1, 0) if state.direction == pf.PF_OUT else (0, 1)
# Set the source address and port. Only set port if it is not 0
src_line = "{}".format(state.nk.addr[src])
if str(state.nk.port[src]):
src_line += (":{}" if state.af == socket.AF_INET else
"[{}]").format(state.nk.port[src])
# Show and NAT (or rdr) address
if (state.nk.addr[src] != state.sk.addr[src]
or state.nk.port[src] != state.sk.port[src]):
src_line += " ({}".format(state.sk.addr[src])
if str(state.sk.port[src]):
src_line += (":{})" if state.af == socket.AF_INET else
"[{}])").format(state.sk.port[src])
# Repeat for destination
dst_line = "{}".format(state.nk.addr[dst])
if str(state.nk.port[dst]):
dst_line += (":{}" if state.af == socket.AF_INET else
"[{}]").format(state.nk.port[dst])
if (state.nk.addr[dst] != state.sk.addr[dst]
or state.nk.port[dst] != state.sk.port[dst]):
dst_line += " ({}".format(state.sk.addr[dst])
if str(state.sk.port[dst]):
dst_line += (":{})" if state.af == socket.AF_INET else
"[{}])").format(state.sk.port[dst])
state_desc = ""
if state.proto == socket.IPPROTO_TCP:
state_desc = "{}:{}".format(PFWEB_TCP_STATES[state.src.state],
PFWEB_TCP_STATES[state.dst.state])
elif state.proto == socket.IPPROTO_UDP:
state_desc = "{}:{}".format(PFWEB_UDP_STATES[state.src.state],
PFWEB_UDP_STATES[state.dst.state])
else:
state_desc = "{}:{}".format(PFWEB_OTHER_STATES[state.src.state],
PFWEB_OTHER_STATES[state.dst.state])
state_struct = {
'ifname':
state.ifname,
'proto':
PFWEB_IPPROTO[state.proto],
'src':
src_line,
'dst':
dst_line,
'state':
state_desc,
'packets': [
int(sum(state.packets)), "TX: {}<br/>RX: {}".format(
sizeof_fmt(state.packets[0], num_type='int'),
sizeof_fmt(state.packets[1], num_type='int'))
],
'bytes': [
int(sum(state.bytes)),
"TX: {}<br/>RX: {}".format(sizeof_fmt(state.bytes[0]),
sizeof_fmt(state.bytes[1]))
],
'expires': [int(state.expire),
timedelta(seconds=state.expire)]
}
states.append(state_struct)
return render_template('states.html',
logged_in=flask_login.current_user.get_id(),
status_tab='active',
states=states)
def xml_to_pfrule(data):
print "starting translation"
print data
xml_datas = []
xml_rules = xmltodict.parse(
data,
dict_constructor=dict
)["mspl-set"]["it-resource"]["configuration"]["rule"]
if isinstance(xml_rules, list):
for xml_rule in xml_rules:
xml_datas.append(xml_rule)
else:
xml_datas.append(xml_rules)
rate_limit = None
rules = pf.PFRuleset()
for xml_data in xml_datas:
print xml_data
rule = pf.PFRule()
if settings.quick_rules == "True":
rule.quick = True
Addrs = None
Addrd = None
Ports = None
Portd = None
xml_src = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"], "source-address")
if xml_src is not None:
Addrs = pf.PFAddr(xml_src)
xml_dst = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"],
"destination-address")
if xml_dst is not None:
Addrd = pf.PFAddr(xml_dst)
xml_proto = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"],
"protocol")
if xml_proto is not None:
if xml_proto.lower() == "tcp":
rule.proto = socket.IPPROTO_TCP
elif xml_proto.lower() == "udp":
rule.proto = socket.IPPROTO_UDP
xml_direction = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"],
"direction")
if xml_direction is not None:
if xml_direction.lower() == "inbound":
rule.direction = pf.PF_IN
elif xml_direction.lower() == "outbound":
rule.direction = pf.PF_OUT
xml_interface = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"],
"interface")
if xml_interface is not None:
rule.ifname = xml_interface.replace("eth", "vtnet")
xml_sport = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"], "source-port")
xml_dport = getValIfKeyExists(
xml_data["condition"]["packet-filter-condition"],
"destination-port")
# Retrieve default target from MSPL
default_target = getValIfKeyExists(xml_data, "action").upper()
if default_target is not None:
if default_target == "ACCEPT":
rule.action = pf.PF_PASS
rule.keep_state = pf.PF_STATE_NORMAL
elif default_target == "DROP":
rule.action = pf.PF_DROP
elif default_target == "REJECT":
rule.action = pf.PF_DROP
rule.rule_flag = pf.PFRULE_RETURN
elif default_target == "SCRUB":
rule.action = pf.PF_SCRUB
# In case of packets/sec rate limit:
if getValIfKeyExists(
xml_data["condition"],
"traffic-flow-condition") is not None:
# It is a number of allowed packets or bits per unit of time
# (seconds, minutes, hours or days).
# -m limit --limit <rate-limit> --limit-burst <limit-burst> \
# -j ACCEPT
# rate_limit = getValIfKeyExists(
# xml_data["condition"]["traffic-flow-condition"],
# "rate-limit")
# The maximum number of connections per host.
max_connections = getValIfKeyExists(
xml_data["condition"]["traffic-flow-condition"],
"max-connections")
# If the action is DROP or REJECT the rule will fire an error
# if max_src_conn is setted
if max_connections is not None and default_target == "ACCEPT":
# rule.max_src_nodes = max_connections
rule.max_src_conn = max_connections
rule.rule_flag = pf.PFRULE_SRCTRACK
# Connections rate limit
connections_rate = getValIfKeyExists(
xml_data["condition"]["traffic-flow-condition"],
"connections-rate")
# If the action is DROP or REJECT the rule will fire an error
# if max_src_conn_rate is setted
if connections_rate is not None and default_target == "ACCEPT":
splitted = connections_rate.split('/')
# rule.max_src_nodes = max_connections
limit = splitted[0]
seconds = splitted[1]
rule.max_src_conn_rate = (limit, seconds)
rule.rule_flag = pf.PFRULE_SRCTRACK
# In case of specified ports, ports can be applied only
# if protocol is specified:
if xml_sport is not None:
if xml_proto is not None:
if xml_proto.lower() == "tcp":
Ports = pf.PFPort(xml_sport, socket.IPPROTO_TCP)
elif xml_proto.lower() == "udp":
Ports = pf.PFPort(xml_sport, socket.IPPROTO_UDP)
else:
Ports = pf.PFPort(xml_sport)
if xml_dport is not None:
if xml_proto is not None:
if xml_proto.lower() == "tcp":
Portd = pf.PFPort(xml_dport, socket.IPPROTO_TCP)
elif xml_proto.lower() == "udp":
Portd = pf.PFPort(xml_dport, socket.IPPROTO_UDP)
else:
print xml_dport
Portd = pf.PFPort(xml_dport)
# TODO: Manage Priority
priority = getValIfKeyExists(xml_data, "priority")
if Addrs is not None and Ports is not None:
rule.src = pf.PFRuleAddr(Addrs, Ports)
elif Addrs is not None:
rule.src = pf.PFRuleAddr(Addrs)
elif Ports is not None:
rule.src = pf.PFRuleAddr(pf.PFAddr(), Ports)
if Addrd is not None and Portd is not None:
rule.dst = pf.PFRuleAddr(Addrd, Portd)
elif Addrd is not None:
rule.dst = pf.PFRuleAddr(Addrd)
elif Portd is not None:
rule.dst = pf.PFRuleAddr(pf.PFAddr(), Portd)
# Append rule
rules.append(rule)
return rules