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Lu Xu
slapos
Commits
32280eca
Commit
32280eca
authored
Oct 23, 2023
by
Kirill Smelkov
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Merge remote-tracking branch 'kirr/x/lte-multiru' into x/lte-multiru
* kirr/x/lte-multiru: . . . .
parents
f3635492
2823bf93
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software/ors-amarisoft/ru/tapsplit
software/ors-amarisoft/ru/tapsplit
+15
-11
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software/ors-amarisoft/
k
/tapsplit
→
software/ors-amarisoft/
ru
/tapsplit
View file @
32280eca
#!/usr/bin/env python
"""XXX doc"""
"""Program tapsplit brings tap interface into state with several children
interfaces each covering part of original interface address space.
Usage: tapsplit <interface> <nchildren>
"""
import
netifaces
import
netaddr
from
socket
import
AF_INET6
from
math
import
log2
,
ceil
from
os.path
import
exists
import
sys
import
subprocess
...
...
@@ -14,10 +17,10 @@ import subprocess
def
main
():
tap
=
sys
.
argv
[
1
]
n
=
int
(
sys
.
argv
[
2
])
assert
n
>
0
,
n
assert
n
>
=
0
,
n
# determine tap's address, network and owner
owner
=
readfile
(
sysnet
(
tap
,
'owner'
)
)
.
strip
()
owner
=
readfile
(
sysnet
(
tap
)
+
'/owner'
)
.
strip
()
addr
=
None
net
=
None
prefixlen
=
None
...
...
@@ -46,18 +49,22 @@ def main():
print
(
'%s: split %s by %d'
%
(
tap
,
net
,
n
))
# cleanup existing children
for
ifname
in
netifaces
.
interfaces
():
if
ifname
.
startswith
(
'%s-'
%
tap
):
run
(
'ip'
,
'link'
,
'del'
,
ifname
)
# see how much prefix bits we need to take to divide by n
n
+=
1
# also leaving first range for the original tap
ptake
=
ceil
(
log2
(
n
))
# do the split
for
i
,
subnet
in
enumerate
(
net
.
subnet
(
prefixlen
+
ptake
)):
if
i
==
0
:
print
(
'preserve %s'
%
subnet
)
continue
# leave this range for original tap
subtap
=
'%s-%d'
%
(
tap
,
i
)
print
(
'-> %s %s'
%
(
subtap
,
subnet
))
if
exists
(
sysnet
(
subtap
)):
run
(
'ip'
,
'link'
,
'del'
,
subtap
)
run
(
'ip'
,
'tuntap'
,
'add'
,
'dev'
,
subtap
,
'mode'
,
'tap'
,
'user'
,
owner
)
run
(
'ip'
,
'link'
,
'set'
,
subtap
,
'up'
)
run
(
'ip'
,
'addr'
,
'add'
,
str
(
subnet
),
'dev'
,
subtap
,
'noprefixroute'
)
...
...
@@ -66,11 +73,8 @@ def main():
# sysnet returns path on /sys corresponding to given interface.
def
sysnet
(
ifname
,
subpath
=
None
):
path
=
'/sys/devices/virtual/net/%s'
%
ifname
if
subpath
is
not
None
:
path
+=
'/'
+
subpath
return
path
def
sysnet
(
ifname
):
return
'/sys/devices/virtual/net/%s'
%
ifname
def
run
(
*
argv
):
print
(
' # %s'
%
' '
.
join
(
argv
))
...
...
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