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Issue #22042: Avoid dangerous C cast in socket.setblocking() 

Avoid cast from (int*) to (u_long*), even if sizeof(int) == sizeof(u_long).
This commit is contained in:
Victor Stinner 2014-07-23 22:56:55 +02:00
parent baddc840d5
commit b6dab6bce8
1 changed files with 5 additions and 2 deletions
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7
Modules/socketmodule.c
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@ -548,6 +548,9 @@ set_gaierror(int error)
static int
internal_setblocking(PySocketSockObject *s, int block)
{
#ifdef MS_WINDOWS
u_long arg;
#endif
#if !defined(MS_WINDOWS) \
&& !((defined(HAVE_SYS_IOCTL_H) && defined(FIONBIO)))
int delay_flag, new_delay_flag;
@ -574,8 +577,8 @@ internal_setblocking(PySocketSockObject *s, int block)
fcntl(s->sock_fd, F_SETFL, new_delay_flag);
#endif
#else /* MS_WINDOWS */
block = !block;
ioctlsocket(s->sock_fd, FIONBIO, (u_long*)&block);
arg = !block;
ioctlsocket(s->sock_fd, FIONBIO, &arg);
#endif /* MS_WINDOWS */
Py_END_ALLOW_THREADS