initial commit of netfilter config generator tool, still needs work on mls/mcs side.

This commit is contained in:
Chris PeBenito 2006-05-24 21:27:52 +00:00
parent 6293baeacc
commit d6c62e7df7

View File

@ -0,0 +1,105 @@
import re
NETPORT = re.compile("^network_port\(\s*\w+\s*(\s*,\s*\w+\s*,\s*\w+\s*,\s*\w+\s*)+\s*\)\s*$")
DEFAULT_PACKET = "packet_t"
PACKET_INPUT = "_server_packet_t"
PACKET_OUTPUT = "_client_packet_t"
packets = []
class Port:
def __init__(self, proto, num, mls_sens, mcs_cats=""):
# protocol of the port
self.proto = proto
# port number
self.num = num
# MLS sensitivity
self.mls_sens = mls_sens
# MCS categories
# not currently supported, so we always get s0
if mcs_cats == "":
self.mcs_cats = "s0"
else
self.mcs_cats = "s0:"+mcs_cats
class Packet:
def __init__(self, prefix, ports):
# prefix
self.prefix = prefix
# A list of Ports
self.ports = ports
def print_input_rules():
print "-A selinux_new_input -j SECMARK --selctx system_u:object_r:"+DEFAULT_PACKET
for i in packets:
for j in i.ports:
output_line="-A selinux_new_input -p "+j.proto+" --dport "+j.num+" -j SECMARK --selctx system_u:object_r:"+i.prefix+PACKET_INPUT
print "-A selinux_new_input -j CONNSECMARK --save"
print "-A selinux_new_input -j RETURN"
def print_output_rules():
print "-A selinux_new_output -j SECMARK --selctx system_u:object_r:"+DEFAULT_PACKET
for i in packets:
for j in i.ports:
print "-A selinux_new_output -p "+j.proto+" --dport "+j.num+" -j SECMARK --selctx system_u:object_r:"+i.prefix+PACKET_OUTPUT
print "-A selinux_new_output -j CONNSECMARK --save"
print "-A selinux_new_output -j RETURN"
def parse_corenet(file_name):
corenet_te_in = open(file_name, "r")
while True:
corenet_line = corenet_te_in.readline()
# If EOF has been reached:
if not corenet_line:
break
if NETPORT.match(corenet_line):
corenet_line = corenet_line.strip();
# parse out the parameters
parms = re.split('\W+',corenet_line[13:-1])
name = parms[0]
del parms[0];
ports = []
while len(parms) > 0:
# add a port combination.
ports.append(Port(parms[0],parms[1],parms[2]))
del parms[:3]
packets.append(Packet(name,ports))
corenet_te_in.close()
def write_netfilter_config():
print "*mangle"
print ":PREROUTING ACCEPT [0:0]"
print ":INPUT ACCEPT [0:0]"
print ":FORWARD ACCEPT [0:0]"
print ":OUTPUT ACCEPT [0:0]"
print ":POSTROUTING ACCEPT [0:0]"
print ":selinux_input [0:0]"
print ":selinux_output [0:0]"
print ":selinux_new_input [0:0]"
print ":selinux_new_output [0:0]"
print "-A INPUT -j selinux_input"
print "-A OUTPUT -j selinux_output"
print "-A selinux_input -m state --state NEW -j selinux_new_input"
print "-A selinux_input -m state --state RELATED,ESTABLISHED -j CONNSECMARK --restore"
print "-A selinux_output -m state --state NEW -j selinux_new_output"
print "-A selinux_output -m state --state RELATED,ESTABLISHED -j CONNSECMARK --restore"
print_input_rules()
print_output_rules()
print "COMMIT"
parse_corenet("policy/modules/kernel/corenetwork.te.in")
write_netfilter_config()