osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 1 | #ifndef __LIBNETLINK_H__ |
| 2 | #define __LIBNETLINK_H__ 1 |
| 3 | |
Strake | 5bd9dd4 | 2012-12-23 08:46:04 -0500 | [diff] [blame] | 4 | #include <stdio.h> |
Jan Engelhardt | f5b830d | 2011-12-31 23:16:27 +0100 | [diff] [blame] | 5 | #include <string.h> |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 6 | #include <asm/types.h> |
| 7 | #include <linux/netlink.h> |
| 8 | #include <linux/rtnetlink.h> |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 9 | #include <linux/if_link.h> |
| 10 | #include <linux/if_addr.h> |
| 11 | #include <linux/neighbour.h> |
Nicolas Dichtel | 9d0efc1 | 2012-12-12 09:09:23 -0800 | [diff] [blame] | 12 | #include <linux/netconf.h> |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 13 | |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 14 | struct rtnl_handle { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 15 | int fd; |
| 16 | struct sockaddr_nl local; |
| 17 | struct sockaddr_nl peer; |
| 18 | __u32 seq; |
| 19 | __u32 dump; |
vadimk | 8a4025f | 2014-12-04 12:32:58 +0200 | [diff] [blame] | 20 | int proto; |
Vadim Kochan | 486ccd9 | 2014-12-26 04:26:27 +0200 | [diff] [blame] | 21 | FILE *dump_fp; |
Nicolas Dichtel | 449b824 | 2015-05-20 16:20:00 +0200 | [diff] [blame] | 22 | #define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01 |
| 23 | int flags; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 24 | }; |
| 25 | |
Patrick McHardy | 7f03191 | 2009-10-28 20:50:48 +0100 | [diff] [blame] | 26 | extern int rcvbuf; |
| 27 | |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 28 | int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions) |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 29 | __attribute__((warn_unused_result)); |
| 30 | |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 31 | int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions, |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 32 | int protocol) |
| 33 | __attribute__((warn_unused_result)); |
| 34 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 35 | void rtnl_close(struct rtnl_handle *rth); |
| 36 | int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type) |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 37 | __attribute__((warn_unused_result)); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 38 | int rtnl_wilddump_req_filter(struct rtnl_handle *rth, int fam, int type, |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 39 | __u32 filt_mask) |
| 40 | __attribute__((warn_unused_result)); |
David Ahern | b0a4ce6 | 2016-05-11 06:51:58 -0700 | [diff] [blame] | 41 | |
| 42 | typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen); |
| 43 | |
| 44 | int rtnl_wilddump_req_filter_fn(struct rtnl_handle *rth, int fam, int type, |
| 45 | req_filter_fn_t fn) |
| 46 | __attribute__((warn_unused_result)); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 47 | int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 48 | int len) |
| 49 | __attribute__((warn_unused_result)); |
David Ahern | 0d238ca | 2015-10-02 09:42:27 -0700 | [diff] [blame] | 50 | int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n) |
| 51 | __attribute__((warn_unused_result)); |
osdl.net!shemminger | 6dc9f01 | 2004-08-31 17:45:21 +0000 | [diff] [blame] | 52 | |
Nicolas Dichtel | 0628cdd | 2015-05-20 16:19:58 +0200 | [diff] [blame] | 53 | struct rtnl_ctrl_data { |
Nicolas Dichtel | 449b824 | 2015-05-20 16:20:00 +0200 | [diff] [blame] | 54 | int nsid; |
Nicolas Dichtel | 0628cdd | 2015-05-20 16:19:58 +0200 | [diff] [blame] | 55 | }; |
| 56 | |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 57 | typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 58 | struct nlmsghdr *n, void *); |
Simon Horman | b49240e | 2009-12-03 12:08:27 +1100 | [diff] [blame] | 59 | |
Nicolas Dichtel | 0628cdd | 2015-05-20 16:19:58 +0200 | [diff] [blame] | 60 | typedef int (*rtnl_listen_filter_t)(const struct sockaddr_nl *, |
| 61 | struct rtnl_ctrl_data *, |
| 62 | struct nlmsghdr *n, void *); |
| 63 | |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 64 | struct rtnl_dump_filter_arg { |
Simon Horman | b49240e | 2009-12-03 12:08:27 +1100 | [diff] [blame] | 65 | rtnl_filter_t filter; |
| 66 | void *arg1; |
Phil Sutter | 8e72880 | 2015-11-24 15:31:01 +0100 | [diff] [blame] | 67 | __u16 nc_flags; |
Simon Horman | b49240e | 2009-12-03 12:08:27 +1100 | [diff] [blame] | 68 | }; |
| 69 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 70 | int rtnl_dump_filter_l(struct rtnl_handle *rth, |
Simon Horman | b49240e | 2009-12-03 12:08:27 +1100 | [diff] [blame] | 71 | const struct rtnl_dump_filter_arg *arg); |
Phil Sutter | 8e72880 | 2015-11-24 15:31:01 +0100 | [diff] [blame] | 72 | int rtnl_dump_filter_nc(struct rtnl_handle *rth, |
| 73 | rtnl_filter_t filter, |
| 74 | void *arg, __u16 nc_flags); |
| 75 | #define rtnl_dump_filter(rth, filter, arg) \ |
| 76 | rtnl_dump_filter_nc(rth, filter, arg, 0) |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 77 | int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, |
| 78 | struct nlmsghdr *answer, size_t len) |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 79 | __attribute__((warn_unused_result)); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 80 | int rtnl_send(struct rtnl_handle *rth, const void *buf, int) |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 81 | __attribute__((warn_unused_result)); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 82 | int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int) |
Stephen Hemminger | d2468da | 2013-12-20 08:15:02 -0800 | [diff] [blame] | 83 | __attribute__((warn_unused_result)); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 84 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 85 | int addattr(struct nlmsghdr *n, int maxlen, int type); |
| 86 | int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data); |
| 87 | int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data); |
| 88 | int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data); |
| 89 | int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data); |
| 90 | int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data); |
Stephen Hemminger | 2aa3dd2 | 2011-12-23 10:43:54 -0800 | [diff] [blame] | 91 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 92 | int addattr_l(struct nlmsghdr *n, int maxlen, int type, |
| 93 | const void *data, int alen); |
| 94 | int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len); |
| 95 | struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type); |
| 96 | int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest); |
| 97 | struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, |
| 98 | const void *data, int len); |
| 99 | int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest); |
Roopa Prabhu | 303cc9c | 2015-10-15 13:13:38 +0200 | [diff] [blame] | 100 | int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data); |
| 101 | int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 102 | int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data); |
Roopa Prabhu | 303cc9c | 2015-10-15 13:13:38 +0200 | [diff] [blame] | 103 | int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 104 | int rta_addattr_l(struct rtattr *rta, int maxlen, int type, |
| 105 | const void *data, int alen); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 106 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 107 | int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len); |
| 108 | int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta, |
Vlad Yasevich | b1b7ce0 | 2013-03-15 10:01:28 -0700 | [diff] [blame] | 109 | int len, unsigned short flags); |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 110 | int parse_rtattr_byindex(struct rtattr *tb[], int max, |
| 111 | struct rtattr *rta, int len); |
| 112 | struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len); |
| 113 | int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 114 | |
Roopa Prabhu | 303cc9c | 2015-10-15 13:13:38 +0200 | [diff] [blame] | 115 | struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type); |
| 116 | int rta_nest_end(struct rtattr *rta, struct rtattr *nest); |
| 117 | |
| 118 | #define RTA_TAIL(rta) \ |
| 119 | ((struct rtattr *) (((void *) (rta)) + \ |
| 120 | RTA_ALIGN((rta)->rta_len))) |
| 121 | |
5!tgraf | 753fca4 | 2005-01-18 22:11:58 +0000 | [diff] [blame] | 122 | #define parse_rtattr_nested(tb, max, rta) \ |
| 123 | (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta))) |
| 124 | |
Jiri Pirko | decbb43 | 2015-01-06 17:23:45 +0100 | [diff] [blame] | 125 | #define parse_rtattr_one_nested(type, rta) \ |
| 126 | (parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta))) |
| 127 | |
Patrick McHardy | 2f90c9c | 2007-08-14 11:21:19 -0700 | [diff] [blame] | 128 | #define parse_rtattr_nested_compat(tb, max, rta, data, len) \ |
Stephen Hemminger | cd70f3f | 2011-12-28 10:37:12 -0800 | [diff] [blame] | 129 | ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \ |
| 130 | __parse_rtattr_nested_compat(tb, max, rta, len); }) |
Patrick McHardy | 2f90c9c | 2007-08-14 11:21:19 -0700 | [diff] [blame] | 131 | |
Stephen Hemminger | 7dd0371 | 2012-03-15 17:47:51 -0700 | [diff] [blame] | 132 | static inline __u8 rta_getattr_u8(const struct rtattr *rta) |
| 133 | { |
| 134 | return *(__u8 *)RTA_DATA(rta); |
| 135 | } |
Stephen Hemminger | 46c5d64 | 2011-12-29 09:29:33 -0800 | [diff] [blame] | 136 | static inline __u16 rta_getattr_u16(const struct rtattr *rta) |
| 137 | { |
| 138 | return *(__u16 *)RTA_DATA(rta); |
| 139 | } |
Stephen Hemminger | 7dd0371 | 2012-03-15 17:47:51 -0700 | [diff] [blame] | 140 | static inline __u32 rta_getattr_u32(const struct rtattr *rta) |
Stephen Hemminger | 46c5d64 | 2011-12-29 09:29:33 -0800 | [diff] [blame] | 141 | { |
| 142 | return *(__u32 *)RTA_DATA(rta); |
| 143 | } |
| 144 | static inline __u64 rta_getattr_u64(const struct rtattr *rta) |
| 145 | { |
| 146 | __u64 tmp; |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 147 | |
Stephen Hemminger | 46c5d64 | 2011-12-29 09:29:33 -0800 | [diff] [blame] | 148 | memcpy(&tmp, RTA_DATA(rta), sizeof(__u64)); |
| 149 | return tmp; |
| 150 | } |
| 151 | static inline const char *rta_getattr_str(const struct rtattr *rta) |
| 152 | { |
Stephen Hemminger | cfd2cbd | 2012-02-06 09:35:27 -0800 | [diff] [blame] | 153 | return (const char *)RTA_DATA(rta); |
Stephen Hemminger | 46c5d64 | 2011-12-29 09:29:33 -0800 | [diff] [blame] | 154 | } |
| 155 | |
Stephen Hemminger | 892e212 | 2015-08-13 14:09:58 -0700 | [diff] [blame] | 156 | int rtnl_listen_all_nsid(struct rtnl_handle *); |
| 157 | int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler, |
| 158 | void *jarg); |
| 159 | int rtnl_from_file(FILE *, rtnl_listen_filter_t handler, |
| 160 | void *jarg); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 161 | |
5!tgraf | 370d67b | 2005-01-18 01:24:18 +0000 | [diff] [blame] | 162 | #define NLMSG_TAIL(nmsg) \ |
| 163 | ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) |
| 164 | |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 165 | #ifndef IFA_RTA |
| 166 | #define IFA_RTA(r) \ |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 167 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 168 | #endif |
| 169 | #ifndef IFA_PAYLOAD |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 170 | #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg)) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 171 | #endif |
| 172 | |
| 173 | #ifndef IFLA_RTA |
| 174 | #define IFLA_RTA(r) \ |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 175 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg)))) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 176 | #endif |
| 177 | #ifndef IFLA_PAYLOAD |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 178 | #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg)) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 179 | #endif |
| 180 | |
| 181 | #ifndef NDA_RTA |
| 182 | #define NDA_RTA(r) \ |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 183 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 184 | #endif |
| 185 | #ifndef NDA_PAYLOAD |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 186 | #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg)) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 187 | #endif |
| 188 | |
| 189 | #ifndef NDTA_RTA |
| 190 | #define NDTA_RTA(r) \ |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 191 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg)))) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 192 | #endif |
| 193 | #ifndef NDTA_PAYLOAD |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 194 | #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg)) |
Stephen Hemminger | ead2ba7 | 2006-12-05 09:54:48 -0800 | [diff] [blame] | 195 | #endif |
| 196 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 197 | #ifndef NETNS_RTA |
| 198 | #define NETNS_RTA(r) \ |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 199 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg)))) |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 200 | #endif |
| 201 | #ifndef NETNS_PAYLOAD |
Stephen Hemminger | e9e9365 | 2016-03-27 10:47:46 -0700 | [diff] [blame] | 202 | #define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg)) |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 203 | #endif |
| 204 | |
Vadim Kochan | 27b14f2 | 2015-01-13 20:14:23 +0200 | [diff] [blame] | 205 | /* User defined nlmsg_type which is used mostly for logging netlink |
| 206 | * messages from dump file */ |
| 207 | #define NLMSG_TSTAMP 15 |
| 208 | |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 209 | #endif /* __LIBNETLINK_H__ */ |