diff options
Diffstat (limited to 'lib/zebra.h')
| -rw-r--r-- | lib/zebra.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/zebra.h b/lib/zebra.h index 6980529e..f2c396d8 100644 --- a/lib/zebra.h +++ b/lib/zebra.h @@ -210,7 +210,13 @@ typedef int socklen_t; #endif /* BSDI_NRL */ /* - * RFC 2553-bis defines not available on some systems. + * RFC 3542 defines several macros for using struct cmsghdr. + * Here, we define those that are not present + */ + +/* + * Internal defines, for use only in this file. + * These are likely wrong on other than ILP32 machines, so warn. */ #ifndef _CMSG_DATA_ALIGN #define _CMSG_DATA_ALIGN(n) (((n) + 3) & ~3) @@ -220,16 +226,24 @@ typedef int socklen_t; #define _CMSG_HDR_ALIGN(n) (((n) + 3) & ~3) #endif /* _CMSG_HDR_ALIGN */ +/* + * CMSG_SPACE and CMSG_LEN are required in RFC3542, but were new in that + * version. + */ #ifndef CMSG_SPACE #define CMSG_SPACE(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + \ _CMSG_HDR_ALIGN(l)) +#warning "assuming 4-byte alignment for CMSG_SPACE" #endif /* CMSG_SPACE */ #ifndef CMSG_LEN #define CMSG_LEN(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + (l)) +#warning "assuming 4-byte alignment for CMSG_LEN" #endif /* CMSG_LEN */ + + #if !(defined(__GNUC__) || defined(VTYSH_EXTRACT_PL)) #define __attribute__(x) #endif /* !__GNUC__ */ |