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