diff options
Diffstat (limited to 'include/libnfnetlink/libnfnetlink.h')
| -rw-r--r-- | include/libnfnetlink/libnfnetlink.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/include/libnfnetlink/libnfnetlink.h b/include/libnfnetlink/libnfnetlink.h index c41dad7..7a63d2f 100644 --- a/include/libnfnetlink/libnfnetlink.h +++ b/include/libnfnetlink/libnfnetlink.h @@ -23,6 +23,11 @@ #define NFNL_BUFFSIZE 8192 +struct nfnlhdr { + struct nlmsghdr nlh; + struct nfgenmsg nfmsg; +}; + struct nfnl_callback { int (*call)(struct nlmsghdr *nlh, struct nfattr *nfa[], void *data); void *data; @@ -113,7 +118,7 @@ extern int nfnl_parse_attr(struct nfattr **, int, struct nfattr *, int); nfnl_parse_attr((tb), (max), NFA_DATA((nfa)), NFA_PAYLOAD((nfa))) #define nfnl_nest(nlh, bufsize, type) \ ({ struct nfattr *__start = NLMSG_TAIL(nlh); \ - nfnl_addattr_l(nlh, bufsize, type, NULL, 0); \ + nfnl_addattr_l(nlh, bufsize, (NFNL_NFA_NEST | type), NULL, 0); \ __start; }) #define nfnl_nest_end(nlh, tail) \ ({ (tail)->nfa_len = (void *) NLMSG_TAIL(nlh) - (void *) tail; }) @@ -125,4 +130,29 @@ extern unsigned int nfnl_rcvbufsiz(struct nfnl_handle *h, unsigned int size); extern void nfnl_dump_packet(struct nlmsghdr *, int, char *); + +/* Pablo: What is the equivalence of be64_to_cpu in userspace? + * + * Harald: Good question. I don't think there's a standard way [yet?], + * so I'd suggest manually implementing it by "#if little endian" bitshift + * operations in C (at least for now). + * + * All the payload of any nfattr will always be in network byte order. + * This would allow easy transport over a real network in the future + * (e.g. jamal's netlink2). + * + * Pablo: I've called it __be64_to_cpu instead of be64_to_cpu, since maybe + * there will one in the userspace headers someday. We don't want to + * pollute POSIX space naming, + */ + +#include <byteswap.h> +#if __BYTE_ORDER == __BIG_ENDIAN +# define __be64_to_cpu(x) (x) +# else +# if __BYTE_ORDER == __LITTLE_ENDIAN +# define __be64_to_cpu(x) __bswap_64(x) +# endif +#endif + #endif /* __LIBNFNETLINK_H */ |