don't understand how this function works, also beefed up the docs. The
most common usage error is of this form (often spread out across gotos):
if (_PyString_Resize(&s, n) < 0) {
Py_DECREF(s);
s = NULL;
goto outtahere;
}
The error is that if _PyString_Resize runs out of memory, it automatically
decrefs the input string object s (which also deallocates it, since its
refcount must be 1 upon entry), and sets s to NULL. So if the "if"
branch ever triggers, it's an error to call Py_DECREF(s): s is already
NULL! A correct way to write the above is the simpler (and intended)
if (_PyString_Resize(&s, n) < 0)
goto outtahere;
Bugfix candidate.
socketmodule.c. No code outside of the .c file references it, so it
doesn't belong the .h file (at least not yet ...), and declaring it
an imported symbol in the .h file can't be made to work on Windows (it's
a cross-DLL symbol then) without substantial code rewriting. Also
repaired the comment that goes along with the decl, to stop referring
to names and functions that haven't existed for 7 years <wink>.
socketmodule.c compiles cleanly on Windows again. The test_socket dies
at once, though (later).
helper module _ssl.
The support for the RAND_* APIs in _ssl is now only enabled
for OpenSSL 0.9.5 and up since they were added in that
release.
Note that socketmodule.* should really be renamed to _socket.* --
unfortunately, this seems to lose the CVS history of the file.
Please review and test... I was only able to test the header file
chaos in socketmodule.c/h on Linux. The test run through fine
and compiles don't give errors or warnings.
WARNING: This patch does *not* include changes to the various
non-Unix build process files.
"socket.socket" -- on Windows, "socket.socket" is the wrapper class.
Also added the module name to the SSL type (which is not a new-style
class -- I don't want to mess with it yet).
constructor acts just like socket() before. All three arguments have
a sensible default now; socket() is equivalent to
socket(AF_INET, SOCK_STREAM).
One minor issue: the socket() function and the SocketType had
different doc strings; socket.__doc__ gave the signature,
SocketType.__doc__ gave the methods. I've merged these for now, but
maybe the list of methods is no longer necessary since it can easily
be recovered through socket.__dict__.keys(). The problem with keeping
it is that the total doc string is a bit long (34 lines -- it scrolls
of a standard tty screen).
Another general issue with the socket module is that it's a big mess.
There's pages and pages of random platform #ifdefs, and the naming
conventions are totally wrong: it uses Py prefixes and CapWords for
static functions. That's a cleanup for another day... (Also I think
the big starting comment that summarizes the API can go -- it's a
repeat of the docstring.)
error occurs, and doesn't return a count. (This is my second patch
from SF patch #474307, with small change to the docstring for send().)
2.1.2 "bugfix" candidate.
Quoth the OpenSSL RAND_add man page:
OpenSSL makes sure that the PRNG state is unique for each
thread. On systems that provide /dev/urandom, the
randomness device is used to seed the PRNG transparently.
However, on all other systems, the application is
responsible for seeding the PRNG by calling RAND_add(),
RAND_egd(3) or RAND_load_file(3).
I decided to expose RAND_add() because it's general and RAND_egd()
because it's a useful special case. RAND_load_file() didn't seem to
offer much over RAND_add(), so I skipped it. Also supplied
RAND_status() which returns true if the PRNG is seeded and false if
not.
To whoever who changed a bunch of (PyCFunction) casts to
(PyNoArgsFunction) in PyMethodDef initializers: don't do that. The
cast is to shut the compiler up. The compiler wants the function
pointer initializer to be a PyCFunction.
a misunderstanding of the refcont behavior of the 'O' format code in
PyArg_ParseTuple() and Py_BuildValue(), respectively.
- pobj is only a borrowed reference, so should *not* be DECREF'ed at
the end. This was the cause of SF bug #470635.
- The Py_BuildValue() call would leak the object produced by
makesockaddr(). (I found this by eyeballing the code.)
Use #define X509_NAME_MAXLEN for server/issuer length on an SSL
object.
Update doc strings for socket.ssl() and ssl methods read() and
write().
PySSL_SSLwrite(): Check return value and raise exception on error.
Use int for len instead of size_t. (All the function the size_t obj
was passed to our from expected an int!)
PySSL_SSLread(): Check return value of PyArg_ParseTuple()! More
robust checks of return values from SSL_read().
Change all the local names that start with SSL to start with PySSL.
The OpenSSL library defines lots of calls that start with "SSL_". The
calls for Python's SSL objects also started with "SSL_". This choice
made it really confusing to figure out which calls were to the library
and which calls were local to the file.
Add PySSL_SetError() that sets an exception based on the information
from SSL_get_error(). This function will eventually replace all the
calls that set it with an error message that is based on the name of
the call that failed rather than the reason it failed. (Example: If
SSL_connect() failed it used to report "SSL_connect error" now it will
offer a specific message about why SSL_connect failed.)
XXX It might be helpful to augment the error message generated
below with the name of the SSL function that generated the error.
I expect it's obvious most of the time.
Remove several unnecessary INCREFs in the module's constructor call.
PyDict_SetItem() and friends do the INCREF for you.
In SSL_dealloc(), free/dealloc them only if they're non-NULL.
Fixes some obvious core dumps, but not sure yet if there are more
semantics to the SSL calls that would affect the dealloc.
XXX [1] These changes aren't tested very thoroughly, because regrtest
doesn't do any SSL tests. I've done some trivial tests on my own, but
don't really know how to use the key and cert files. In one case, an
SSL-level error causes Python to dump core. I'll get the fixed in the
next round of changes.
XXX [2] The checkin removes the x_attr member of the SSLObject struct.
I'm not sure if this is kosher for backwards compatibility at the
binary level. Perhaps its safer to keep the member but keep it
assigned to NULL.
And the leaks?
newSSLObject() called PyDict_New(), stored the result in x_attr
without checking it, and later stored NULL in x_attr without doing
anything to the dict. So the dict always leaks. There is no further
reference to x_attr, so I just removed it completely.
The error cases in newSSLObject() passed the return value of
PyString_FromString() directly to PyErr_SetObject().
PyErr_SetObject() expects a borrowed reference, so the string leaked.
pyport.h: typedef a new Py_intptr_t type.
DELICATE ASSUMPTION: That HAVE_UINTPTR_T implies intptr_t is
available as well as uintptr_t. If that turns out not to be
true, things must get uglier (C99 wants both, so I think it's
an assumption we're *likely* to get away with).
thread_nt.h, PyThread_start_new_thread: MS _beginthread is documented
as returning unsigned long; no idea why uintptr_t was being used.
Others: Always use Py_[u]intptr_t, never [u]intptr_t directly.
Tim Peters
Neil Schemenauer
Jack Jansen
Fred Drake
Neal Norwitz
Andrew MacIntyre
Martin v. Löwis
Marc-André Lemburg
Andrew M. Kuchling
Michael W. Hudson
Guido van Rossum
Jeremy Hylton
Barry Warsaw