diff options
Diffstat (limited to 'defines.h')
-rw-r--r-- | defines.h | 20 |
1 files changed, 19 insertions, 1 deletions
@@ -25,7 +25,7 @@ #ifndef _DEFINES_H #define _DEFINES_H -/* $Id: defines.h,v 1.99 2003/06/11 12:51:32 djm Exp $ */ +/* $Id: defines.h,v 1.100 2003/08/07 05:58:28 dtucker Exp $ */ /* Constants */ @@ -577,4 +577,22 @@ struct winsize { /** end of login recorder definitions */ +#ifndef CMSG_DATA +/* given pointer to struct cmsghdr, return pointer to data */ +#define CMSG_DATA(cmsg) \ + ((u_char *)(cmsg) + (((u_int)(sizeof(struct cmsghdr)) \ + (sizeof(int) - 1)) &~ (sizeof(int) - 1))) +#endif /* CMSG_DATA */ + +#ifndef CMSG_FIRSTHDR +/* + * RFC 2292 requires to check msg_controllen, in case that the kernel returns + * an empty list for some reasons. + */ +# define CMSG_FIRSTHDR(mhdr) \ + ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \ + (struct cmsghdr *)(mhdr)->msg_control : \ + (struct cmsghdr *)NULL) +#endif /* CMSG_FIRSTHDR */ + #endif /* _DEFINES_H */ |