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2004-08-26 Greg Troxel <gdt@fnord.ir.bbn.com>

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* sockopt.h: Define method-independent macro for callers of
	get_ifindex to use for cmsg length.
This commit is contained in:
gdt 2004-08-26 13:12:41 +00:00
parent 95e735b544
commit afa43b2392
2 changed files with 37 additions and 7 deletions
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5
lib/ChangeLog
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@ -1,3 +1,8 @@
2004-08-26 Greg Troxel <gdt@fnord.ir.bbn.com>
* sockopt.h: Define method-independent macro for callers of
get_ifindex to use for cmsg length.
2004-08-19 Paul Jakma <paul@dishone.st>
* zebra.h: add MAX and MIN defines (eg for ospf6d)

39
lib/sockopt.h
View File

@ -31,25 +31,46 @@ int setsockopt_ipv6_hoplimit (int, int);
int setsockopt_ipv6_multicast_loop (int, int);
#endif /* HAVE_IPV6 */
#if defined (IP_PKTINFO)
/*
* It is OK to reference in6_pktinfo here without a protecting #if
* because this macro will only be used #if HAVE_IPV6, and in6_pktinfo
* is not optional for HAVE_IPV6.
*/
#define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof (struct in6_pktinfo));
/*
* Size defines for control messages used to get ifindex. We define
* values for each method, and define a macro that can be used by code
* that is unaware of which method is in use.
* XXX Needs to use CMSG_DATA and CMSG_ALIGN.
*/
#if defined (IP_PKTINFO)
/* Linux in_pktinfo. */
#define SOPT_SIZE_CMSG_PKTINFO_IPV4() (sizeof (struct in_pktinfo))
#define SOPT_SIZE_CMSG_IFINDEX_IPV4 SOPT_SIZE_CMSG_PKTINFO_IPV4
/* XXX This should perhaps be defined even if IP_PKTINFO is not. */
#define SOPT_SIZE_CMSG_PKTINFO(af) \
((af == AF_INET) ? SOPT_SIZE_CMSG_PKTINFO_IPV4() \
: SOPT_SIZE_CMSG_PKTINFO_IPV6()
#define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_PKTINFO_IPV4
#elif defined (IP_RECVIF)
/* BSD/Solaris. Arguably these should say RECVIF rather than IFINDEX. */
#if defined (SUNOS_5)
#define SOPT_SIZE_CMSG_IFINDEX_IPV4() (sizeof (uint_t))
#else
#define SOPT_SIZE_CMSG_IFINDEX_IPV4() (sizeof (struct sockaddr_dl))
#define SOPT_SIZE_CMSG_IFINDEX_IPV4() \
__CMSG_ALIGN((sizeof (struct sockaddr_dl)))
#endif /* SUNOS_5 */
#endif
#define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof (struct in6_pktinfo));
/*
* AF-parameterized message size.
* XXX Why is this here? Is it used? The v6 case is not defined.
*/
#define SOPT_SIZE_CMSG_IFINDEX(af) \
((af == AF_INET) ? SOPT_SIZE_CMSG_IFINDEX_IPV4() \
: SOPT_SIZE_CMSG_IFINDEX_IPV6()
@ -60,9 +81,13 @@ int setsockopt_multicast_ipv4(int sock,
unsigned int mcast_addr,
unsigned int ifindex);
#if defined (IP_PKTINFO)
/*
* XXX Exactly what is this an interface to? Specifically, what calls
* can be made after calling it?
*/
int setsockopt_pktinfo (int, int, int);
#endif
/* Ask for, and get, ifindex, by whatever method is supported. */
int setsockopt_ifindex (int, int, int);
int getsockopt_ifindex (int, struct msghdr *);
#endif /*_ZEBRA_SOCKOPT_H */