workaround another sendmsg kernel bug on 64-bit machines

the kernel wrongly expects the cmsg length field to be size_t instead
of socklen_t. in order to work around the issue, we have to impose a
length limit and copy to a local buffer. the length limit should be
more than sufficient for any real-world use; these headers are only
used for passing file descriptors and permissions between processes
over unix sockets.

1 files changed, 0 insertions, 7 deletions

diff --git a/include/sys/socket.h b/include/sys/socket.h
index 50de321b..88243ae5 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -17,13 +17,6 @@ extern "C" {
 
 #include <bits/socket.h>
 
-struct cmsghdr
-{
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
-
 struct ucred
 {
 	pid_t pid;