On Wed, Jun 21, 2017 at 04:01:19PM +0300, Dmitry V. Levin wrote: [...] > So far I have no better ideas than to introduce a local header, > e.g. netlink.h, containing, besides an include guard, something like this: > > #include <sys/socket.h> > #include <linux/netlink.h> > > #undef NLMSG_HDRLEN > #define NLMSG_HDRLEN ((unsigned int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) > > #ifndef NLA_ALIGN > # define NLA_ALIGN(len) (((len) + 3) & ~3) > #endif > > #undef NLA_HDRLEN > #define NLA_HDRLEN ((unsigned int) NLA_ALIGN(sizeof(struct nlattr))) > > #ifndef NLA_TYPE_MASK > # define NLA_F_NESTED (1 << 15) > # define NLA_F_NET_BYTEORDER (1 << 14) > # define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) > #endif
While we are here, a fallback definition for NLMSG_MIN_TYPE seems to be needed as well, this constant was introduced along with NLMSG_HDRLEN. -- ldv
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