1#ifndef __LINUX_NETLINK_H
2#define __LINUX_NETLINK_H
3
4#include <linux/socket.h>
5#include <linux/types.h>
6
7#define NETLINK_ROUTE 0
8#define NETLINK_UNUSED 1
9#define NETLINK_USERSOCK 2
10#define NETLINK_FIREWALL 3
11#define NETLINK_INET_DIAG 4
12#define NETLINK_NFLOG 5
13#define NETLINK_XFRM 6
14#define NETLINK_SELINUX 7
15#define NETLINK_ISCSI 8
16#define NETLINK_AUDIT 9
17#define NETLINK_FIB_LOOKUP 10
18#define NETLINK_CONNECTOR 11
19#define NETLINK_NETFILTER 12
20#define NETLINK_IP6_FW 13
21#define NETLINK_DNRTMSG 14
22#define NETLINK_KOBJECT_UEVENT 15
23#define NETLINK_GENERIC 16
24
25#define NETLINK_SCSITRANSPORT 18
26#define NETLINK_ECRYPTFS 19
27
28#define MAX_LINKS 32
29
30struct net;
31
32struct sockaddr_nl
33{
34 sa_family_t nl_family;
35 unsigned short nl_pad;
36 __u32 nl_pid;
37 __u32 nl_groups;
38};
39
40struct nlmsghdr
41{
42 __u32 nlmsg_len;
43 __u16 nlmsg_type;
44 __u16 nlmsg_flags;
45 __u32 nlmsg_seq;
46 __u32 nlmsg_pid;
47};
48
49
50
51#define NLM_F_REQUEST 1
52#define NLM_F_MULTI 2
53#define NLM_F_ACK 4
54#define NLM_F_ECHO 8
55
56
57#define NLM_F_ROOT 0x100
58#define NLM_F_MATCH 0x200
59#define NLM_F_ATOMIC 0x400
60#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
61
62
63#define NLM_F_REPLACE 0x100
64#define NLM_F_EXCL 0x200
65#define NLM_F_CREATE 0x400
66#define NLM_F_APPEND 0x800
67
68
69
70
71
72
73
74
75
76
77#define NLMSG_ALIGNTO 4
78#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
79#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
80#define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
81#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
82#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
83#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
84 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
85#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
86 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
87 (nlh)->nlmsg_len <= (len))
88#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
89
90#define NLMSG_NOOP 0x1
91#define NLMSG_ERROR 0x2
92#define NLMSG_DONE 0x3
93#define NLMSG_OVERRUN 0x4
94
95#define NLMSG_MIN_TYPE 0x10
96
97struct nlmsgerr
98{
99 int error;
100 struct nlmsghdr msg;
101};
102
103#define NETLINK_ADD_MEMBERSHIP 1
104#define NETLINK_DROP_MEMBERSHIP 2
105#define NETLINK_PKTINFO 3
106#define NETLINK_BROADCAST_ERROR 4
107#define NETLINK_NO_ENOBUFS 5
108
109struct nl_pktinfo
110{
111 __u32 group;
112};
113
114#define NET_MAJOR 36
115
116enum {
117 NETLINK_UNCONNECTED = 0,
118 NETLINK_CONNECTED,
119};
120
121
122
123
124
125
126
127
128
129
130struct nlattr
131{
132 __u16 nla_len;
133 __u16 nla_type;
134};
135
136
137
138
139
140
141
142
143
144
145
146#define NLA_F_NESTED (1 << 15)
147#define NLA_F_NET_BYTEORDER (1 << 14)
148#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
149
150#define NLA_ALIGNTO 4
151#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
152#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
153
154#ifdef __KERNEL__
155
156#include <linux/capability.h>
157#include <linux/skbuff.h>
158
159static inline struct nlmsghdr *nlmsg_hdr(const struct sk_buff *skb)
160{
161 return (struct nlmsghdr *)skb->data;
162}
163
164struct netlink_skb_parms
165{
166 struct ucred creds;
167 __u32 pid;
168 __u32 dst_group;
169 kernel_cap_t eff_cap;
170 __u32 loginuid;
171 __u32 sessionid;
172 __u32 sid;
173};
174
175#define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
176#define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds)
177
178
179extern void netlink_table_grab(void);
180extern void netlink_table_ungrab(void);
181
182extern struct sock *netlink_kernel_create(struct net *net,
183 int unit,unsigned int groups,
184 void (*input)(struct sk_buff *skb),
185 struct mutex *cb_mutex,
186 struct module *module);
187extern void netlink_kernel_release(struct sock *sk);
188extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);
189extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
190extern void __netlink_clear_multicast_users(struct sock *sk, unsigned int group);
191extern void netlink_clear_multicast_users(struct sock *sk, unsigned int group);
192extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
193extern int netlink_has_listeners(struct sock *sk, unsigned int group);
194extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);
195extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
196 __u32 group, gfp_t allocation);
197extern void netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code);
198extern int netlink_register_notifier(struct notifier_block *nb);
199extern int netlink_unregister_notifier(struct notifier_block *nb);
200
201
202struct sock *netlink_getsockbyfilp(struct file *filp);
203int netlink_attachskb(struct sock *sk, struct sk_buff *skb,
204 long *timeo, struct sock *ssk);
205void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
206int netlink_sendskb(struct sock *sk, struct sk_buff *skb);
207
208
209
210
211
212
213
214#if PAGE_SIZE < 8192UL
215#define NLMSG_GOODSIZE SKB_WITH_OVERHEAD(PAGE_SIZE)
216#else
217#define NLMSG_GOODSIZE SKB_WITH_OVERHEAD(8192UL)
218#endif
219
220#define NLMSG_DEFAULT_SIZE (NLMSG_GOODSIZE - NLMSG_HDRLEN)
221
222
223struct netlink_callback
224{
225 struct sk_buff *skb;
226 const struct nlmsghdr *nlh;
227 int (*dump)(struct sk_buff * skb,
228 struct netlink_callback *cb);
229 int (*done)(struct netlink_callback *cb);
230 int family;
231 long args[6];
232};
233
234struct netlink_notify
235{
236 struct net *net;
237 int pid;
238 int protocol;
239};
240
241static __inline__ struct nlmsghdr *
242__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
243{
244 struct nlmsghdr *nlh;
245 int size = NLMSG_LENGTH(len);
246
247 nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
248 nlh->nlmsg_type = type;
249 nlh->nlmsg_len = size;
250 nlh->nlmsg_flags = flags;
251 nlh->nlmsg_pid = pid;
252 nlh->nlmsg_seq = seq;
253 if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
254 memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
255 return nlh;
256}
257
258#define NLMSG_NEW(skb, pid, seq, type, len, flags) \
259({ if (unlikely(skb_tailroom(skb) < (int)NLMSG_SPACE(len))) \
260 goto nlmsg_failure; \
261 __nlmsg_put(skb, pid, seq, type, len, flags); })
262
263#define NLMSG_PUT(skb, pid, seq, type, len) \
264 NLMSG_NEW(skb, pid, seq, type, len, 0)
265
266extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
267 const struct nlmsghdr *nlh,
268 int (*dump)(struct sk_buff *skb, struct netlink_callback*),
269 int (*done)(struct netlink_callback*));
270
271
272#define NL_NONROOT_RECV 0x1
273#define NL_NONROOT_SEND 0x2
274extern void netlink_set_nonroot(int protocol, unsigned flag);
275
276#endif
277
278#endif
279