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1842. [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 05:42:53 +00:00
parent 852e0edf29
commit 1100decf3f
2 changed files with 9 additions and 2 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
1842. [port] cmsg_len() could produce incorrect results on
some platform. [RT #13744]
1840. [func] dnssec-signzone can now randomize signature end times
(dnssec-signzone -j jitter). [RT #13609]

8
lib/isc/unix/socket.c
View file

@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: socket.c,v 1.237.18.10 2005/03/16 23:51:28 marka Exp $ */
/* $Id: socket.c,v 1.237.18.11 2005/03/30 05:42:53 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
}