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Commit | Line | Data |
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6054c1eb | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
aba5acdf SH |
2 | #ifndef __LIBNETLINK_H__ |
3 | #define __LIBNETLINK_H__ 1 | |
4 | ||
5bd9dd49 | 5 | #include <stdio.h> |
f5b830dc | 6 | #include <string.h> |
aba5acdf SH |
7 | #include <asm/types.h> |
8 | #include <linux/netlink.h> | |
9 | #include <linux/rtnetlink.h> | |
ead2ba70 SH |
10 | #include <linux/if_link.h> |
11 | #include <linux/if_addr.h> | |
12 | #include <linux/neighbour.h> | |
9d0efc10 | 13 | #include <linux/netconf.h> |
aab0f610 | 14 | #include <arpa/inet.h> |
aba5acdf | 15 | |
e9e9365b | 16 | struct rtnl_handle { |
aba5acdf SH |
17 | int fd; |
18 | struct sockaddr_nl local; | |
19 | struct sockaddr_nl peer; | |
20 | __u32 seq; | |
21 | __u32 dump; | |
8a4025f6 | 22 | int proto; |
486ccd99 | 23 | FILE *dump_fp; |
449b824a | 24 | #define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01 |
3ad6d176 | 25 | #define RTNL_HANDLE_F_SUPPRESS_NLERR 0x02 |
449b824a | 26 | int flags; |
aba5acdf SH |
27 | }; |
28 | ||
4ad87594 DA |
29 | struct nlmsg_list { |
30 | struct nlmsg_list *next; | |
31 | struct nlmsghdr h; | |
32 | }; | |
33 | ||
34 | struct nlmsg_chain { | |
35 | struct nlmsg_list *head; | |
36 | struct nlmsg_list *tail; | |
37 | }; | |
38 | ||
7f03191f PM |
39 | extern int rcvbuf; |
40 | ||
e9e9365b | 41 | int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions) |
d2468da0 SH |
42 | __attribute__((warn_unused_result)); |
43 | ||
e9e9365b | 44 | int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions, |
d2468da0 SH |
45 | int protocol) |
46 | __attribute__((warn_unused_result)); | |
47 | ||
892e2124 SH |
48 | void rtnl_close(struct rtnl_handle *rth); |
49 | int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type) | |
d2468da0 | 50 | __attribute__((warn_unused_result)); |
892e2124 | 51 | int rtnl_wilddump_req_filter(struct rtnl_handle *rth, int fam, int type, |
d2468da0 SH |
52 | __u32 filt_mask) |
53 | __attribute__((warn_unused_result)); | |
b0a4ce62 DA |
54 | |
55 | typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen); | |
56 | ||
57 | int rtnl_wilddump_req_filter_fn(struct rtnl_handle *rth, int fam, int type, | |
58 | req_filter_fn_t fn) | |
59 | __attribute__((warn_unused_result)); | |
7abf5de6 NA |
60 | int rtnl_wilddump_stats_req_filter(struct rtnl_handle *rth, int fam, int type, |
61 | __u32 filt_mask) | |
62 | __attribute__((warn_unused_result)); | |
892e2124 | 63 | int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, |
d2468da0 SH |
64 | int len) |
65 | __attribute__((warn_unused_result)); | |
0d238ca2 DA |
66 | int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n) |
67 | __attribute__((warn_unused_result)); | |
6dc9f016 | 68 | |
0628cddd | 69 | struct rtnl_ctrl_data { |
449b824a | 70 | int nsid; |
0628cddd ND |
71 | }; |
72 | ||
ae665a52 | 73 | typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, |
50772dc5 | 74 | struct nlmsghdr *n, void *); |
b49240ec | 75 | |
0628cddd ND |
76 | typedef int (*rtnl_listen_filter_t)(const struct sockaddr_nl *, |
77 | struct rtnl_ctrl_data *, | |
78 | struct nlmsghdr *n, void *); | |
79 | ||
b6432e68 SH |
80 | typedef int (*nl_ext_ack_fn_t)(const char *errmsg, uint32_t off, |
81 | const struct nlmsghdr *inner_nlh); | |
82 | ||
e9e9365b | 83 | struct rtnl_dump_filter_arg { |
b49240ec SH |
84 | rtnl_filter_t filter; |
85 | void *arg1; | |
8e72880f | 86 | __u16 nc_flags; |
b49240ec SH |
87 | }; |
88 | ||
892e2124 | 89 | int rtnl_dump_filter_l(struct rtnl_handle *rth, |
b49240ec | 90 | const struct rtnl_dump_filter_arg *arg); |
8e72880f PS |
91 | int rtnl_dump_filter_nc(struct rtnl_handle *rth, |
92 | rtnl_filter_t filter, | |
93 | void *arg, __u16 nc_flags); | |
94 | #define rtnl_dump_filter(rth, filter, arg) \ | |
95 | rtnl_dump_filter_nc(rth, filter, arg, 0) | |
892e2124 | 96 | int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, |
86bf43c7 | 97 | struct nlmsghdr **answer) |
d2468da0 | 98 | __attribute__((warn_unused_result)); |
72a2ff39 CM |
99 | int rtnl_talk_iov(struct rtnl_handle *rtnl, struct iovec *iovec, size_t iovlen, |
100 | struct nlmsghdr **answer) | |
101 | __attribute__((warn_unused_result)); | |
b6432e68 | 102 | int rtnl_talk_extack(struct rtnl_handle *rtnl, struct nlmsghdr *n, |
86bf43c7 | 103 | struct nlmsghdr **answer, nl_ext_ack_fn_t errfn) |
b6432e68 | 104 | __attribute__((warn_unused_result)); |
463d9efa | 105 | int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle *rtnl, struct nlmsghdr *n, |
86bf43c7 | 106 | struct nlmsghdr **answer) |
463d9efa | 107 | __attribute__((warn_unused_result)); |
892e2124 | 108 | int rtnl_send(struct rtnl_handle *rth, const void *buf, int) |
d2468da0 | 109 | __attribute__((warn_unused_result)); |
892e2124 | 110 | int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int) |
d2468da0 | 111 | __attribute__((warn_unused_result)); |
049c5853 | 112 | int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn); |
aba5acdf | 113 | |
892e2124 SH |
114 | int addattr(struct nlmsghdr *n, int maxlen, int type); |
115 | int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data); | |
116 | int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data); | |
117 | int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data); | |
118 | int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data); | |
119 | int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data); | |
120 | ||
121 | int addattr_l(struct nlmsghdr *n, int maxlen, int type, | |
122 | const void *data, int alen); | |
123 | int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len); | |
124 | struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type); | |
125 | int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest); | |
126 | struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, | |
127 | const void *data, int len); | |
128 | int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest); | |
303cc9cb RP |
129 | int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data); |
130 | int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data); | |
892e2124 | 131 | int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data); |
303cc9cb | 132 | int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data); |
892e2124 SH |
133 | int rta_addattr_l(struct rtattr *rta, int maxlen, int type, |
134 | const void *data, int alen); | |
135 | ||
136 | int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len); | |
137 | int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta, | |
b1b7ce0f | 138 | int len, unsigned short flags); |
892e2124 SH |
139 | int parse_rtattr_byindex(struct rtattr *tb[], int max, |
140 | struct rtattr *rta, int len); | |
141 | struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len); | |
142 | int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len); | |
aba5acdf | 143 | |
303cc9cb RP |
144 | struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type); |
145 | int rta_nest_end(struct rtattr *rta, struct rtattr *nest); | |
146 | ||
147 | #define RTA_TAIL(rta) \ | |
148 | ((struct rtattr *) (((void *) (rta)) + \ | |
149 | RTA_ALIGN((rta)->rta_len))) | |
150 | ||
753fca4f | 151 | #define parse_rtattr_nested(tb, max, rta) \ |
152 | (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta))) | |
153 | ||
decbb437 JP |
154 | #define parse_rtattr_one_nested(type, rta) \ |
155 | (parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta))) | |
156 | ||
2f90c9c0 | 157 | #define parse_rtattr_nested_compat(tb, max, rta, data, len) \ |
cd70f3f5 SH |
158 | ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \ |
159 | __parse_rtattr_nested_compat(tb, max, rta, len); }) | |
2f90c9c0 | 160 | |
7dd03712 SH |
161 | static inline __u8 rta_getattr_u8(const struct rtattr *rta) |
162 | { | |
163 | return *(__u8 *)RTA_DATA(rta); | |
164 | } | |
46c5d64d SH |
165 | static inline __u16 rta_getattr_u16(const struct rtattr *rta) |
166 | { | |
167 | return *(__u16 *)RTA_DATA(rta); | |
168 | } | |
aab0f610 AV |
169 | static inline __be16 rta_getattr_be16(const struct rtattr *rta) |
170 | { | |
171 | return ntohs(rta_getattr_u16(rta)); | |
172 | } | |
7dd03712 | 173 | static inline __u32 rta_getattr_u32(const struct rtattr *rta) |
46c5d64d SH |
174 | { |
175 | return *(__u32 *)RTA_DATA(rta); | |
176 | } | |
aab0f610 AV |
177 | static inline __be32 rta_getattr_be32(const struct rtattr *rta) |
178 | { | |
179 | return ntohl(rta_getattr_u32(rta)); | |
180 | } | |
46c5d64d SH |
181 | static inline __u64 rta_getattr_u64(const struct rtattr *rta) |
182 | { | |
183 | __u64 tmp; | |
e9e9365b | 184 | |
46c5d64d SH |
185 | memcpy(&tmp, RTA_DATA(rta), sizeof(__u64)); |
186 | return tmp; | |
187 | } | |
188 | static inline const char *rta_getattr_str(const struct rtattr *rta) | |
189 | { | |
cfd2cbd1 | 190 | return (const char *)RTA_DATA(rta); |
46c5d64d SH |
191 | } |
192 | ||
892e2124 SH |
193 | int rtnl_listen_all_nsid(struct rtnl_handle *); |
194 | int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler, | |
195 | void *jarg); | |
196 | int rtnl_from_file(FILE *, rtnl_listen_filter_t handler, | |
197 | void *jarg); | |
aba5acdf | 198 | |
370d67ba | 199 | #define NLMSG_TAIL(nmsg) \ |
200 | ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) | |
201 | ||
ead2ba70 SH |
202 | #ifndef IFA_RTA |
203 | #define IFA_RTA(r) \ | |
e9e9365b | 204 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) |
ead2ba70 SH |
205 | #endif |
206 | #ifndef IFA_PAYLOAD | |
e9e9365b | 207 | #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg)) |
ead2ba70 SH |
208 | #endif |
209 | ||
210 | #ifndef IFLA_RTA | |
211 | #define IFLA_RTA(r) \ | |
e9e9365b | 212 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg)))) |
ead2ba70 SH |
213 | #endif |
214 | #ifndef IFLA_PAYLOAD | |
e9e9365b | 215 | #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg)) |
ead2ba70 SH |
216 | #endif |
217 | ||
218 | #ifndef NDA_RTA | |
219 | #define NDA_RTA(r) \ | |
e9e9365b | 220 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) |
ead2ba70 SH |
221 | #endif |
222 | #ifndef NDA_PAYLOAD | |
e9e9365b | 223 | #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg)) |
ead2ba70 SH |
224 | #endif |
225 | ||
226 | #ifndef NDTA_RTA | |
227 | #define NDTA_RTA(r) \ | |
e9e9365b | 228 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg)))) |
ead2ba70 SH |
229 | #endif |
230 | #ifndef NDTA_PAYLOAD | |
e9e9365b | 231 | #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg)) |
ead2ba70 SH |
232 | #endif |
233 | ||
d182ee13 ND |
234 | #ifndef NETNS_RTA |
235 | #define NETNS_RTA(r) \ | |
e9e9365b | 236 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg)))) |
d182ee13 ND |
237 | #endif |
238 | #ifndef NETNS_PAYLOAD | |
e9e9365b | 239 | #define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg)) |
d182ee13 ND |
240 | #endif |
241 | ||
7abf5de6 NA |
242 | #ifndef IFLA_STATS_RTA |
243 | #define IFLA_STATS_RTA(r) \ | |
244 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg)))) | |
245 | #endif | |
246 | ||
27b14f2e VK |
247 | /* User defined nlmsg_type which is used mostly for logging netlink |
248 | * messages from dump file */ | |
249 | #define NLMSG_TSTAMP 15 | |
250 | ||
aba5acdf | 251 | #endif /* __LIBNETLINK_H__ */ |