netlink: Remove handmade rtnl macros/definitions

All we need is (should be) in rtnetlink.h
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/libnetlink.h

 #ifndef LIBNETLINK_H__
 #define LIBNETLINK_H__
 
-struct rtattr {
-	unsigned short  rta_len;
-	unsigned short  rta_type;
-};
-
-/* Macros to handle rtattributes */
-
-#define RTA_ALIGNTO		4
-#define RTA_ALIGN(len)		(((len) + RTA_ALIGNTO - 1) & ~(RTA_ALIGNTO - 1))
-
-#define RTA_OK(rta, len)	((len) >= (int)sizeof(struct rtattr) &&		\
-				 (rta)->rta_len >= sizeof(struct rtattr) &&	\
-				 (rta)->rta_len <= (len))
-
-#define RTA_NEXT(rta, attrlen)	((attrlen) -= RTA_ALIGN((rta)->rta_len),	\
-				 (struct rtattr *)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
-
-#define RTA_LENGTH(len)		(RTA_ALIGN(sizeof(struct rtattr)) + (len))
-#define RTA_SPACE(len)		RTA_ALIGN(RTA_LENGTH(len))
-#define RTA_DATA(rta)		((void *)(((char *)(rta)) + RTA_LENGTH(0)))
-#define RTA_PAYLOAD(rta)	((int)((rta)->rta_len) - RTA_LENGTH(0))
-
-#ifndef NLMSG_ALIGN
-# define NLMSG_ALIGN(len)	(((len) + NLMSG_ALIGNTO - 1) & ~(NLMSG_ALIGNTO - 1))
-#endif
-
-#ifndef NLMSG_HDRLEN
-# define NLMSG_HDRLEN		((int)NLMSG_ALIGN(sizeof(struct nlmsghdr)))
-#endif
-
-#ifndef NLMSG_LENGTH
-# define NLMSG_LENGTH(len)	((len) + NLMSG_ALIGN(NLMSG_HDRLEN))
-#endif
-
-#define NLMSG_SPACE(len)	NLMSG_ALIGN(NLMSG_LENGTH(len))
-
-#ifndef NLMSG_DATA
-# define NLMSG_DATA(nlh)	((void *)(((char *)nlh) + NLMSG_LENGTH(0)))
-#endif
-
-#ifndef NLMSG_NEXT
-# define NLMSG_NEXT(nlh, len)	((len) -= NLMSG_ALIGN((nlh)->nlmsg_len),	\
-				 (struct nlmsghdr *)(((char *)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
-#endif
-
-#define NLMSG_OK(nlh, len)	((len) >= (int)sizeof(struct nlmsghdr) &&	\
-				 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
-				 (nlh)->nlmsg_len <= (len))
-
-#define NLMSG_PAYLOAD(nlh, len)	((nlh)->nlmsg_len - NLMSG_SPACE((len)))
-
-#define NLMSG_NOOP              0x1     /* Nothing.             */
-#define NLMSG_ERROR             0x2     /* Error                */
-#define NLMSG_DONE              0x3     /* End of a dump        */
-#define NLMSG_OVERRUN           0x4     /* Data lost            */
-
-#define NLMSG_MIN_TYPE          0x10    /* < 0x10: reserved control messages */
-
 #define CR_NLMSG_SEQ		24680	/* arbitrary chosen */
 
 extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);

libnetlink.c

 #include <linux/types.h>
 #include <sys/socket.h>
 #include <linux/netlink.h>
+#include <linux/rtnetlink.h>
 #include <string.h>
 #include <unistd.h>
 

sk-inet.c

 #include <sys/types.h>
 #include <sys/socket.h>
 #include <linux/netlink.h>
+#include <linux/rtnetlink.h>
 #include <unistd.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>

sk-unix.c

 #include <sys/socket.h>
 #include <linux/netlink.h>
+#include <linux/rtnetlink.h>
 #include <unistd.h>
 #include <netinet/tcp.h>
 #include <sys/stat.h>

sockets.c

 #include <sys/socket.h>
 #include <linux/netlink.h>
+#include <linux/rtnetlink.h>
 #include <netinet/tcp.h>
 
 #include "libnetlink.h"