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osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +00001#ifndef __LIBNETLINK_H__
2#define __LIBNETLINK_H__ 1
3
Strake5bd9dd42012-12-23 08:46:04 -05004#include <stdio.h>
Jan Engelhardtf5b830d2011-12-31 23:16:27 +01005#include <string.h>
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +00006#include <asm/types.h>
7#include <linux/netlink.h>
8#include <linux/rtnetlink.h>
Stephen Hemmingeread2ba72006-12-05 09:54:48 -08009#include <linux/if_link.h>
10#include <linux/if_addr.h>
11#include <linux/neighbour.h>
Nicolas Dichtel9d0efc12012-12-12 09:09:23 -080012#include <linux/netconf.h>
Amir Vadaiaab0f612016-12-02 13:25:13 +020013#include <arpa/inet.h>
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000014
Stephen Hemmingere9e93652016-03-27 10:47:46 -070015struct rtnl_handle {
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000016 int fd;
17 struct sockaddr_nl local;
18 struct sockaddr_nl peer;
19 __u32 seq;
20 __u32 dump;
vadimk8a4025f2014-12-04 12:32:58 +020021 int proto;
Vadim Kochan486ccd92014-12-26 04:26:27 +020022 FILE *dump_fp;
Nicolas Dichtel449b8242015-05-20 16:20:00 +020023#define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01
24 int flags;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000025};
26
Patrick McHardy7f031912009-10-28 20:50:48 +010027extern int rcvbuf;
28
Stephen Hemmingere9e93652016-03-27 10:47:46 -070029int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080030 __attribute__((warn_unused_result));
31
Stephen Hemmingere9e93652016-03-27 10:47:46 -070032int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080033 int protocol)
34 __attribute__((warn_unused_result));
35
Stephen Hemminger892e2122015-08-13 14:09:58 -070036void rtnl_close(struct rtnl_handle *rth);
37int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type)
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080038 __attribute__((warn_unused_result));
Stephen Hemminger892e2122015-08-13 14:09:58 -070039int rtnl_wilddump_req_filter(struct rtnl_handle *rth, int fam, int type,
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080040 __u32 filt_mask)
41 __attribute__((warn_unused_result));
David Ahernb0a4ce62016-05-11 06:51:58 -070042
43typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen);
44
45int rtnl_wilddump_req_filter_fn(struct rtnl_handle *rth, int fam, int type,
46 req_filter_fn_t fn)
47 __attribute__((warn_unused_result));
Nikolay Aleksandrov7abf5de2016-08-25 14:28:55 +020048int rtnl_wilddump_stats_req_filter(struct rtnl_handle *rth, int fam, int type,
49 __u32 filt_mask)
50 __attribute__((warn_unused_result));
Stephen Hemminger892e2122015-08-13 14:09:58 -070051int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080052 int len)
53 __attribute__((warn_unused_result));
David Ahern0d238ca2015-10-02 09:42:27 -070054int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
55 __attribute__((warn_unused_result));
osdl.net!shemminger6dc9f012004-08-31 17:45:21 +000056
Nicolas Dichtel0628cdd2015-05-20 16:19:58 +020057struct rtnl_ctrl_data {
Nicolas Dichtel449b8242015-05-20 16:20:00 +020058 int nsid;
Nicolas Dichtel0628cdd2015-05-20 16:19:58 +020059};
60
Stephen Hemmingerae665a52006-12-05 10:10:22 -080061typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
osdl.net!shemminger50772dc2004-12-07 21:48:29 +000062 struct nlmsghdr *n, void *);
Simon Hormanb49240e2009-12-03 12:08:27 +110063
Nicolas Dichtel0628cdd2015-05-20 16:19:58 +020064typedef int (*rtnl_listen_filter_t)(const struct sockaddr_nl *,
65 struct rtnl_ctrl_data *,
66 struct nlmsghdr *n, void *);
67
Stephen Hemmingere9e93652016-03-27 10:47:46 -070068struct rtnl_dump_filter_arg {
Simon Hormanb49240e2009-12-03 12:08:27 +110069 rtnl_filter_t filter;
70 void *arg1;
Phil Sutter8e728802015-11-24 15:31:01 +010071 __u16 nc_flags;
Simon Hormanb49240e2009-12-03 12:08:27 +110072};
73
Stephen Hemminger892e2122015-08-13 14:09:58 -070074int rtnl_dump_filter_l(struct rtnl_handle *rth,
Simon Hormanb49240e2009-12-03 12:08:27 +110075 const struct rtnl_dump_filter_arg *arg);
Phil Sutter8e728802015-11-24 15:31:01 +010076int rtnl_dump_filter_nc(struct rtnl_handle *rth,
77 rtnl_filter_t filter,
78 void *arg, __u16 nc_flags);
79#define rtnl_dump_filter(rth, filter, arg) \
80 rtnl_dump_filter_nc(rth, filter, arg, 0)
Stephen Hemminger892e2122015-08-13 14:09:58 -070081int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
82 struct nlmsghdr *answer, size_t len)
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080083 __attribute__((warn_unused_result));
Stephen Hemminger892e2122015-08-13 14:09:58 -070084int rtnl_send(struct rtnl_handle *rth, const void *buf, int)
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080085 __attribute__((warn_unused_result));
Stephen Hemminger892e2122015-08-13 14:09:58 -070086int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int)
Stephen Hemmingerd2468da2013-12-20 08:15:02 -080087 __attribute__((warn_unused_result));
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000088
Stephen Hemminger892e2122015-08-13 14:09:58 -070089int addattr(struct nlmsghdr *n, int maxlen, int type);
90int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
91int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
92int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
93int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
94int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);
Stephen Hemminger2aa3dd22011-12-23 10:43:54 -080095
Stephen Hemminger892e2122015-08-13 14:09:58 -070096int addattr_l(struct nlmsghdr *n, int maxlen, int type,
97 const void *data, int alen);
98int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
99struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
100int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
101struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type,
102 const void *data, int len);
103int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
Roopa Prabhu303cc9c2015-10-15 13:13:38 +0200104int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data);
105int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data);
Stephen Hemminger892e2122015-08-13 14:09:58 -0700106int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
Roopa Prabhu303cc9c2015-10-15 13:13:38 +0200107int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data);
Stephen Hemminger892e2122015-08-13 14:09:58 -0700108int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
109 const void *data, int alen);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000110
Stephen Hemminger892e2122015-08-13 14:09:58 -0700111int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
112int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta,
Vlad Yasevichb1b7ce02013-03-15 10:01:28 -0700113 int len, unsigned short flags);
Stephen Hemminger892e2122015-08-13 14:09:58 -0700114int parse_rtattr_byindex(struct rtattr *tb[], int max,
115 struct rtattr *rta, int len);
116struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len);
117int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000118
Roopa Prabhu303cc9c2015-10-15 13:13:38 +0200119struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
120int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
121
122#define RTA_TAIL(rta) \
123 ((struct rtattr *) (((void *) (rta)) + \
124 RTA_ALIGN((rta)->rta_len)))
125
5!tgraf753fca42005-01-18 22:11:58 +0000126#define parse_rtattr_nested(tb, max, rta) \
127 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
128
Jiri Pirkodecbb432015-01-06 17:23:45 +0100129#define parse_rtattr_one_nested(type, rta) \
130 (parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta)))
131
Patrick McHardy2f90c9c2007-08-14 11:21:19 -0700132#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
Stephen Hemmingercd70f3f2011-12-28 10:37:12 -0800133 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
134 __parse_rtattr_nested_compat(tb, max, rta, len); })
Patrick McHardy2f90c9c2007-08-14 11:21:19 -0700135
Stephen Hemminger7dd03712012-03-15 17:47:51 -0700136static inline __u8 rta_getattr_u8(const struct rtattr *rta)
137{
138 return *(__u8 *)RTA_DATA(rta);
139}
Stephen Hemminger46c5d642011-12-29 09:29:33 -0800140static inline __u16 rta_getattr_u16(const struct rtattr *rta)
141{
142 return *(__u16 *)RTA_DATA(rta);
143}
Amir Vadaiaab0f612016-12-02 13:25:13 +0200144static inline __be16 rta_getattr_be16(const struct rtattr *rta)
145{
146 return ntohs(rta_getattr_u16(rta));
147}
Stephen Hemminger7dd03712012-03-15 17:47:51 -0700148static inline __u32 rta_getattr_u32(const struct rtattr *rta)
Stephen Hemminger46c5d642011-12-29 09:29:33 -0800149{
150 return *(__u32 *)RTA_DATA(rta);
151}
Amir Vadaiaab0f612016-12-02 13:25:13 +0200152static inline __be32 rta_getattr_be32(const struct rtattr *rta)
153{
154 return ntohl(rta_getattr_u32(rta));
155}
Stephen Hemminger46c5d642011-12-29 09:29:33 -0800156static inline __u64 rta_getattr_u64(const struct rtattr *rta)
157{
158 __u64 tmp;
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700159
Stephen Hemminger46c5d642011-12-29 09:29:33 -0800160 memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
161 return tmp;
162}
163static inline const char *rta_getattr_str(const struct rtattr *rta)
164{
Stephen Hemmingercfd2cbd2012-02-06 09:35:27 -0800165 return (const char *)RTA_DATA(rta);
Stephen Hemminger46c5d642011-12-29 09:29:33 -0800166}
167
Stephen Hemminger892e2122015-08-13 14:09:58 -0700168int rtnl_listen_all_nsid(struct rtnl_handle *);
169int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler,
170 void *jarg);
171int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
172 void *jarg);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000173
5!tgraf370d67b2005-01-18 01:24:18 +0000174#define NLMSG_TAIL(nmsg) \
175 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
176
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800177#ifndef IFA_RTA
178#define IFA_RTA(r) \
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700179 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800180#endif
181#ifndef IFA_PAYLOAD
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700182#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800183#endif
184
185#ifndef IFLA_RTA
186#define IFLA_RTA(r) \
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700187 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800188#endif
189#ifndef IFLA_PAYLOAD
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700190#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800191#endif
192
193#ifndef NDA_RTA
194#define NDA_RTA(r) \
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700195 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800196#endif
197#ifndef NDA_PAYLOAD
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700198#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800199#endif
200
201#ifndef NDTA_RTA
202#define NDTA_RTA(r) \
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700203 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800204#endif
205#ifndef NDTA_PAYLOAD
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700206#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg))
Stephen Hemmingeread2ba72006-12-05 09:54:48 -0800207#endif
208
Nicolas Dichteld182ee12015-02-17 17:30:37 +0100209#ifndef NETNS_RTA
210#define NETNS_RTA(r) \
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700211 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))))
Nicolas Dichteld182ee12015-02-17 17:30:37 +0100212#endif
213#ifndef NETNS_PAYLOAD
Stephen Hemmingere9e93652016-03-27 10:47:46 -0700214#define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg))
Nicolas Dichteld182ee12015-02-17 17:30:37 +0100215#endif
216
Nikolay Aleksandrov7abf5de2016-08-25 14:28:55 +0200217#ifndef IFLA_STATS_RTA
218#define IFLA_STATS_RTA(r) \
219 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg))))
220#endif
221
Vadim Kochan27b14f22015-01-13 20:14:23 +0200222/* User defined nlmsg_type which is used mostly for logging netlink
223 * messages from dump file */
224#define NLMSG_TSTAMP 15
225
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000226#endif /* __LIBNETLINK_H__ */