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Kirill Smelkov
cpython
Commits
0f83ba55
Commit
0f83ba55
authored
Jul 19, 1997
by
Guido van Rossum
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Change security policy -- only accept requests from current host.
parent
e1a3901d
Changes
1
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1 changed file
with
9 additions
and
21 deletions
+9
-21
Demo/pysvr/pysvr.py
Demo/pysvr/pysvr.py
+9
-21
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Demo/pysvr/pysvr.py
View file @
0f83ba55
...
...
@@ -6,13 +6,15 @@ This is really a prototype for the same thing in C.
Usage: pysvr.py [port]
For security reasons, it only accepts requests from the current host.
This can still be insecure, but restricts violations from people who
can log in on your machine. Use with caution!
"""
import
sys
,
os
,
string
,
getopt
,
thread
,
socket
,
traceback
OK_DOMAINS
=
[
".cnri.reston.va.us"
,
".python.org"
]
PORT
=
7585892
%
0xFFFF
# == 49367
PORT
=
4000
# Default port
def
main
():
try
:
...
...
@@ -43,6 +45,7 @@ def main_thread(port):
sock
=
socket
.
socket
(
socket
.
AF_INET
,
socket
.
SOCK_STREAM
)
sock
.
bind
((
""
,
port
))
sock
.
listen
(
5
)
print
"Listening on port"
,
port
,
"..."
while
1
:
(
conn
,
addr
)
=
sock
.
accept
()
thread
.
start_new_thread
(
service_thread
,
(
conn
,
addr
))
...
...
@@ -50,26 +53,11 @@ def main_thread(port):
def
service_thread
(
conn
,
addr
):
(
caddr
,
cport
)
=
addr
try
:
host
,
aliases
,
ipaddrs
=
socket
.
gethostbyaddr
(
caddr
)
except
socket
.
error
:
print
"Don't know hostname for"
,
caddr
return
if
'.'
not
in
host
:
for
a
in
aliases
:
if
'.'
in
a
:
host
=
a
break
else
:
print
"Only a local name (%s) for %s"
%
(
host
,
caddr
)
return
i
=
string
.
find
(
host
,
'.'
)
domain
=
string
.
lower
(
host
[
i
:])
if
domain
not
in
OK_DOMAINS
:
print
"Connection from"
,
host
,
"not accepted"
if
caddr
!=
socket
.
gethostbyname
(
socket
.
gethostname
()):
print
"Connection from"
,
caddr
,
"not accepted."
return
print
"Thread %s has connection from %s.
\
n
"
%
(
str
(
thread
.
get_ident
()),
host
),
caddr
),
stdin
=
conn
.
makefile
(
"r"
)
stdout
=
conn
.
makefile
(
"w"
,
0
)
run_interpreter
(
stdin
,
stdout
)
...
...
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