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1841. [port] cmsg_len() could produce incorrect results on

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some platform. [RT #13744]
This commit is contained in:
Mark Andrews
2005-03-30 05:37:08 +00:00
parent 574367734b
commit 2132a56b5c
2 changed files with 9 additions and 2 deletions
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8
lib/isc/unix/socket.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: socket.c,v 1.247 2005/03/16 23:39:06 marka Exp $ */
/* $Id: socket.c,v 1.248 2005/03/30 05:37:08 marka Exp $ */
#include <config.h>
@@ -465,7 +465,11 @@ cmsg_len(ISC_SOCKADDR_LEN_T len) {
#else
ISC_SOCKADDR_LEN_T hdrlen;
hdrlen = (ISC_SOCKADDR_LEN_T)CMSG_DATA(NULL); /* XXX */
/*
* Cast NULL so that any pointer arithmetic performed by CMSG_DATA
* is correct.
*/
hdrlen = (ISC_SOCKADDR_LEN_T)CMSG_DATA(((struct cmsghdr *)NULL));
return (hdrlen + len);
#endif
}