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* ext/socket/ancdata.c (discard_cmsg_resource): new function to close

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file descriptors in control message.
  (bsock_recvmsg_internal): call discard_cmsg_resource before retrying
  recvmsg.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2009-02-18 13:47:53 +00:00
parent f1a39b9e5c
commit 75ba47e8e8
2 changed files with 31 additions and 0 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
Wed Feb 18 22:47:01 2009 Tanaka Akira <akr@fsij.org>
* ext/socket/ancdata.c (discard_cmsg_resource): new function to close
file descriptors in control message.
(bsock_recvmsg_internal): call discard_cmsg_resource before retrying
recvmsg.
Wed Feb 18 21:47:37 2009 Tanaka Akira <akr@fsij.org>
* ext/socket/ancdata.c (bsock_recvmsg_internal): prevent misalignment.

24
ext/socket/ancdata.c
View file

@ -1099,6 +1099,28 @@ rb_recvmsg(int fd, struct msghdr *msg, int flags)
return rb_thread_blocking_region(nogvl_recvmsg_func, &args, RUBY_UBF_IO, 0);
}
static void
discard_cmsg_resource(struct msghdr *mh)
{
#if defined(HAVE_ST_MSG_CONTROL)
struct cmsghdr *cmh;
if (mh->msg_controllen == 0)
return;
for (cmh = CMSG_FIRSTHDR(mh); cmh != NULL; cmh = CMSG_NXTHDR(mh, cmh)) {
if (cmh->cmsg_level == SOL_SOCKET && cmh->cmsg_type == SCM_RIGHTS) {
int *fdp = (int *)CMSG_DATA(cmh);
int *end = (int *)((char *)cmh + cmh->cmsg_len);
while (fdp < end) {
close(*fdp);
fdp++;
}
}
}
#endif
}
static VALUE
bsock_recvmsg_internal(int argc, VALUE *argv, VALUE sock, int nonblock)
{
@ -1232,12 +1254,14 @@ bsock_recvmsg_internal(int argc, VALUE *argv, VALUE sock, int nonblock)
}
#endif
if (grown) {
discard_cmsg_resource(&mh);
goto retry;
}
else {
grow_buffer = 0;
if (flags != orig_flags) {
flags = orig_flags;
discard_cmsg_resource(&mh);
goto retry;
}
}