1 #ifndef __LIBNETLINK_H__ 2 #define __LIBNETLINK_H__ 1 3 4 #include <asm/types.h> 5 #include <linux/netlink.h> 6 #include <linux/rtnetlink.h> 7 #include <linux/if_link.h> 8 #include <linux/if_addr.h> 9 #include <linux/neighbour.h> 10 11 struct rtnl_handle 12 { 13 int fd; 14 struct sockaddr_nl local; 15 struct sockaddr_nl peer; 16 __u32 seq; 17 __u32 dump; 18 }; 19 20 extern int rcvbuf; 21 22 extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions); 23 extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol); 24 extern void rtnl_close(struct rtnl_handle *rth); 25 extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type); 26 extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len); 27 28 typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, 29 struct nlmsghdr *n, void *); 30 31 struct rtnl_dump_filter_arg 32 { 33 rtnl_filter_t filter; 34 void *arg1; 35 rtnl_filter_t junk; 36 void *arg2; 37 }; 38 39 extern int rtnl_dump_filter_l(struct rtnl_handle *rth, 40 const struct rtnl_dump_filter_arg *arg); 41 extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter, 42 void *arg1, 43 rtnl_filter_t junk, 44 void *arg2); 45 46 extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer, 47 unsigned groups, struct nlmsghdr *answer, 48 rtnl_filter_t junk, 49 void *jarg); 50 extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int); 51 extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int); 52 53 extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data); 54 extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen); 55 extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len); 56 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type); 57 extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest); 58 extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, const void *data, int len); 59 extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest); 60 extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data); 61 extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen); 62 63 extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len); 64 extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len); 65 extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len); 66 67 #define parse_rtattr_nested(tb, max, rta) \ 68 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta))) 69 70 #define parse_rtattr_nested_compat(tb, max, rta, data, len) \ 71 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \ 72 __parse_rtattr_nested_compat(tb, max, rta, len); }) 73 74 extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, 75 void *jarg); 76 extern int rtnl_from_file(FILE *, rtnl_filter_t handler, 77 void *jarg); 78 79 #define NLMSG_TAIL(nmsg) \ 80 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) 81 82 #ifndef IFA_RTA 83 #define IFA_RTA(r) \ 84 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) 85 #endif 86 #ifndef IFA_PAYLOAD 87 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) 88 #endif 89 90 #ifndef IFLA_RTA 91 #define IFLA_RTA(r) \ 92 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg)))) 93 #endif 94 #ifndef IFLA_PAYLOAD 95 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg)) 96 #endif 97 98 #ifndef NDA_RTA 99 #define NDA_RTA(r) \ 100 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) 101 #endif 102 #ifndef NDA_PAYLOAD 103 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg)) 104 #endif 105 106 #ifndef NDTA_RTA 107 #define NDTA_RTA(r) \ 108 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg)))) 109 #endif 110 #ifndef NDTA_PAYLOAD 111 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg)) 112 #endif 113 114 #endif /* __LIBNETLINK_H__ */ 115 116