def activate_interface(dummy=None):
"""Turns the dummy interface 'up'"""
dummy = dummy or DUMMY
try:
systemArgs('ifconfig', dummy, 'up')
except ErrorcodeException, e:
_error(9, "Could not activate interface", dummy, *e)
def get_current_interfaces(dummy=None):
"""Retrieves current IPs active for given/default dummy interface"""
dummy = dummy or DUMMY
try:
ip_output = systemArgs('ip', 'addr')
except ErrorcodeException, e:
_error(7, "Could not run 'ip addr', error", *e)
def update_ip6(iface='eth0', real_ip=None, conf=None):
"""Removes inactive IPv6s and adds new IPv6s to eth0 interface"""
(should_have, should_have_ip6) = get_my_virtualservers(real_ip=real_ip, conf=conf)
has_already_ip6 = get_current_ip6()
# must_delete = filter(lambda x:x not in should_have, has_already)
# must_delete = [ip for ip in has_already if ip not in should_have]
# Using sets is a lot more sexy.... :)
must_delete = has_already_ip6 - should_have_ip6
must_add = should_have_ip6 - has_already_ip6
_debug("Deleting", must_delete)
for ip6 in must_delete:
try:
systemArgs('ip', '-6','addr', 'del', ip6, 'dev', iface)
except ErrorcodeException, e:
# The error code if 'ip addr del' says
# "RTNETLINK answers: Cannot assign requested address"
if e[0] == 2:
_warning("Ignoring already removed ip", ip6)
else:
_error(10, "Could not remove", ip6)
def update_interfaces(dummy=None, real_ip=None, conf=None):
"""Removes inactive IPs and adds new IPs to dummy interface"""
dummy = dummy or DUMMY
should_have = get_my_virtualservers(real_ip=real_ip, conf=conf)
has_already = get_current_interfaces(dummy)
# must_delete = filter(lambda x:x not in should_have, has_already)
# must_delete = [ip for ip in has_already if ip not in should_have]
# Using sets is a lot more sexy.... :)
must_delete = has_already - should_have
must_add = should_have - has_already
_debug("Deleting", must_delete)
for ip in must_delete:
try:
systemArgs('ip', 'addr', 'del', ip, 'dev', dummy)
except ErrorcodeException, e:
# The error code if 'ip addr del' says
# "RTNETLINK answers: Cannot assign requested address"
if e[0] == 2:
_warning("Ignoring already removed ip", ip)
else:
_error(10, "Could not remove", ip)
def hide_interface(dummy=None):
"""Makes the dummy interface 'hidden' to avoid ARP responses and
related problems."""
dummy = dummy or DUMMY
from os import uname
try:
if (uname()[2].find('2.6') > -1):
# litt annen vri i 2.6
open("/proc/sys/net/ipv4/conf/%s/arp_announce" % dummy, "w").write("2\n")
open("/proc/sys/net/ipv4/conf/%s/arp_ignore" % dummy, "w").write("1\n")
open("/proc/sys/net/ipv4/conf/all/arp_announce", "w").write("2\n")
open("/proc/sys/net/ipv4/conf/all/arp_ignore" , "w").write("1\n")
else:
open("/proc/sys/net/ipv4/conf/%s/hidden" % dummy, "w").write("1\n")
# NEeded according to Magnus..
open("/proc/sys/net/ipv4/conf/all/hidden", "w").write("1\n")
except IOError, e:
# Turning off interface since we can't hide it
try:
systemArgs('ifconfig', dummy, 'down')
except ErrorcodeException:
pass
_error(8, "Could not set interface", dummy, "hidden", *e)
def hide_interface(dummy=None):
"""Makes the dummy interface 'hidden' to avoid ARP responses and
related problems."""
dummy = dummy or DUMMY
try:
if os.uname()[2].startswith('2.4'):
open("/proc/sys/net/ipv4/conf/%s/hidden" % dummy, "w").write("1\n")
# This global setting is also needed
open("/proc/sys/net/ipv4/conf/all/hidden", "w").write("1\n")
else:
# Assume 2.6 or later
# Linux 2.6 does things slightly more verbose
open("/proc/sys/net/ipv4/conf/%s/arp_announce" % dummy, "w").write("2\n")
open("/proc/sys/net/ipv4/conf/%s/arp_ignore" % dummy, "w").write("1\n")
# This global setting is also needed
open("/proc/sys/net/ipv4/conf/all/arp_announce", "w").write("2\n")
open("/proc/sys/net/ipv4/conf/all/arp_ignore" , "w").write("1\n")
except IOError, e:
# Turning off interface since we can't hide it
try:
systemArgs('ifconfig', dummy, 'down')
except ErrorcodeException:
pass
_error(8, "Could not set interface", dummy, "hidden", *e)
def get_current_ip6(iface='eth0'):
"""Retrieves current IPs active for given/default dummy interface"""
try:
ip_output = systemArgs('ip', '-6', 'addr', 'show', 'dev', iface)
except ErrorcodeException, e:
_error(7, "Could not run 'ip addr', error", *e)
must_add = should_have - has_already
_debug("Deleting", must_delete)
for ip in must_delete:
try:
systemArgs('ip', 'addr', 'del', "%s/32" % ip, 'dev', dummy)
except ErrorcodeException, e:
# The error code if 'ip addr del' says
# "RTNETLINK answers: Cannot assign requested address"
if e[0] == 2:
_warning("Ignoring already removed ip", ip)
else:
_error(10, "Could not remove", ip)
_debug("Adding", must_add)
for ip in must_add:
try:
systemArgs('ip', 'addr', 'add', ip, 'dev', dummy)
except ErrorcodeException, e:
# The error code if 'ip addr add' says
# "RTNETLINK answers: File exists"
if e[0] == 2:
_warning("Ignoring already added ip", ip)
else:
_error(11, "Could not add", ip)
if should_have:
# make interface hidden if we have any active IPs
# (if no IPv4-addresses are on interface, hide_interface()
# won't work)
hide_interface(dummy)
def activate_interface(dummy=None):
"""Turns the dummy interface 'up'"""
must_add = should_have - has_already
_debug("Deleting", must_delete)
for ip in must_delete:
try:
systemArgs('ip', 'addr', 'del', ip, 'dev', dummy)
except ErrorcodeException, e:
# The error code if 'ip addr del' says
# "RTNETLINK answers: Cannot assign requested address"
if e[0] == 2:
_warning("Ignoring already removed ip", ip)
else:
_error(10, "Could not remove", ip)
_debug("Adding", must_add)
for ip in must_add:
try:
systemArgs('ip', 'addr', 'add', ip, 'dev', dummy)
except ErrorcodeException, e:
# The error code if 'ip addr add' says
# "RTNETLINK answers: File exists"
if e[0] == 2:
_warning("Ignoring already added ip", ip)
else:
_error(11, "Could not add", ip)
if should_have:
# make interface hidden if we have any active IPs
# (if no IPv4-addresses are on interface, hide_interface()
# won't work)
hide_interface(dummy)
def activate_interface(dummy=None):
"""Turns the dummy interface 'up'"""
