1 #ifndef __LIBNETLINK_H__ 2 #define __LIBNETLINK_H__ 1 3 4 #include <string.h> 5 #include <asm/types.h> 6 #include <linux/netlink.h> 7 #include <linux/rtnetlink.h> 8 #include <linux/if_link.h> 9 #include <linux/if_addr.h> 10 #include <linux/neighbour.h> 11 12 struct rtnl_handle 13 { 14 int fd; 15 struct sockaddr_nl local; 16 struct sockaddr_nl peer; 17 __u32 seq; 18 __u32 dump; 19 }; 20 21 extern int rcvbuf; 22 23 extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions); 24 extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol); 25 extern void rtnl_close(struct rtnl_handle *rth); 26 extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type); 27 extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len); 28 29 typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, 30 struct nlmsghdr *n, void *); 31 32 struct rtnl_dump_filter_arg 33 { 34 rtnl_filter_t filter; 35 void *arg1; 36 }; 37 38 extern int rtnl_dump_filter_l(struct rtnl_handle *rth, 39 const struct rtnl_dump_filter_arg *arg); 40 extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter, 41 void *arg); 42 extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer, 43 unsigned groups, struct nlmsghdr *answer); 44 extern int rtnl_send(struct rtnl_handle *rth, const void *buf, int); 45 extern int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int); 46 47 extern int addattr(struct nlmsghdr *n, int maxlen, int type); 48 extern int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data); 49 extern int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data); 50 extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data); 51 extern int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data); 52 extern int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data); 53 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 static inline __u8 rta_getattr_u8(const struct rtattr *rta) 75 { 76 return *(__u8 *)RTA_DATA(rta); 77 } 78 static inline __u16 rta_getattr_u16(const struct rtattr *rta) 79 { 80 return *(__u16 *)RTA_DATA(rta); 81 } 82 static inline __u32 rta_getattr_u32(const struct rtattr *rta) 83 { 84 return *(__u32 *)RTA_DATA(rta); 85 } 86 static inline __u64 rta_getattr_u64(const struct rtattr *rta) 87 { 88 __u64 tmp; 89 memcpy(&tmp, RTA_DATA(rta), sizeof(__u64)); 90 return tmp; 91 } 92 static inline const char *rta_getattr_str(const struct rtattr *rta) 93 { 94 return (const char *)RTA_DATA(rta); 95 } 96 97 extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, 98 void *jarg); 99 extern int rtnl_from_file(FILE *, rtnl_filter_t handler, 100 void *jarg); 101 102 #define NLMSG_TAIL(nmsg) \ 103 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) 104 105 #ifndef IFA_RTA 106 #define IFA_RTA(r) \ 107 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) 108 #endif 109 #ifndef IFA_PAYLOAD 110 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) 111 #endif 112 113 #ifndef IFLA_RTA 114 #define IFLA_RTA(r) \ 115 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg)))) 116 #endif 117 #ifndef IFLA_PAYLOAD 118 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg)) 119 #endif 120 121 #ifndef NDA_RTA 122 #define NDA_RTA(r) \ 123 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) 124 #endif 125 #ifndef NDA_PAYLOAD 126 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg)) 127 #endif 128 129 #ifndef NDTA_RTA 130 #define NDTA_RTA(r) \ 131 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg)))) 132 #endif 133 #ifndef NDTA_PAYLOAD 134 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg)) 135 #endif 136 137 #endif /* __LIBNETLINK_H__ */ 138 139
