Date: Fri, 11 Aug 2000 10:33:59 +1000 (EST) From: Mark.Andrews@nominum.com To: FreeBSD-gnats-submit@freebsd.org Subject: misc/20530: CMSG_DATA requires additional header file to be included Message-ID: <200008110033.KAA20407@drugs.dv.isc.org>
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>Number: 20530
>Category: misc
>Synopsis: CMSG_DATA requires additional header file to be included
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Aug 10 17:40:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Mark Andrews
>Release: FreeBSD 4.1-STABLE i386
>Organization:
Nominum
>Environment:
FreeBSD drugs.dv.isc.org 4.1-STABLE FreeBSD 4.1-STABLE #0: Tue Aug 8 18:01:02 EST 2000 marka@drugs.dv.isc.org:/usr/obj/usr/src/sys/DRUGS i386
>Description:
The CMSG_* macros use macros not defined in <sys/types.h> and
<sys/socket.h> causing linkage failures. CMSG_* macros manipulate
data returned / sent by recvmsg() / sendmsg(). The only header
files that should be required by a application are <sys/types.h>
and <sys/socket.h>.
FreeBSD is currently gratuitously differnet in its requirements
w.r.t. the CMSG_* macros.
>How-To-Repeat:
The following compiles and links on all platforms except FreeBSD,
it is not expected to run without errors.
#include <sys/types.h>
#include <sys/socket.h>
int
main() {
struct msghdr *msghdr = (struct msghdr *)0;
struct cmsghdr *cmsghdr;
unsigned char *data;
cmsghdr = CMSG_FIRSTHDR(msghdr);
data = CMSG_DATA(cmsghdr);
}
>Fix:
Add #include <sys/param.h> to <sys/socket.h> or redefine relevent
CMSG_* macros to use things only defined in <sys/types.h> and
<sys/socket.h>.
>Release-Note:
>Audit-Trail:
>Unformatted:
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