testing: use a decent PSK
[strongswan.git] / src / include / linux / netlink.h
1 #ifndef __LINUX_NETLINK_H
2 #define __LINUX_NETLINK_H
3
4 #include <linux/socket.h> /* for sa_family_t */
5 #include <linux/types.h>
6
7 #define NETLINK_ROUTE 0 /* Routing/device hook */
8 #define NETLINK_W1 1 /* 1-wire subsystem */
9 #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
10 #define NETLINK_FIREWALL 3 /* Firewalling hook */
11 #define NETLINK_INET_DIAG 4 /* INET socket monitoring */
12 #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
13 #define NETLINK_XFRM 6 /* ipsec */
14 #define NETLINK_SELINUX 7 /* SELinux event notifications */
15 #define NETLINK_ISCSI 8 /* Open-iSCSI */
16 #define NETLINK_AUDIT 9 /* auditing */
17 #define NETLINK_FIB_LOOKUP 10
18 #define NETLINK_CONNECTOR 11
19 #define NETLINK_NETFILTER 12 /* netfilter subsystem */
20 #define NETLINK_IP6_FW 13
21 #define NETLINK_DNRTMSG 14 /* DECnet routing messages */
22 #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
23 #define NETLINK_GENERIC 16
24
25 #define MAX_LINKS 32
26
27 struct sockaddr_nl
28 {
29 sa_family_t nl_family; /* AF_NETLINK */
30 unsigned short nl_pad; /* zero */
31 __u32 nl_pid; /* process pid */
32 __u32 nl_groups; /* multicast groups mask */
33 };
34
35 struct nlmsghdr
36 {
37 __u32 nlmsg_len; /* Length of message including header */
38 __u16 nlmsg_type; /* Message content */
39 __u16 nlmsg_flags; /* Additional flags */
40 __u32 nlmsg_seq; /* Sequence number */
41 __u32 nlmsg_pid; /* Sending process PID */
42 };
43
44 /* Flags values */
45
46 #define NLM_F_REQUEST 1 /* It is request message. */
47 #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
48 #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
49 #define NLM_F_ECHO 8 /* Echo this request */
50
51 /* Modifiers to GET request */
52 #define NLM_F_ROOT 0x100 /* specify tree root */
53 #define NLM_F_MATCH 0x200 /* return all matching */
54 #define NLM_F_ATOMIC 0x400 /* atomic GET */
55 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
56
57 /* Modifiers to NEW request */
58 #define NLM_F_REPLACE 0x100 /* Override existing */
59 #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
60 #define NLM_F_CREATE 0x400 /* Create, if it does not exist */
61 #define NLM_F_APPEND 0x800 /* Add to end of list */
62
63 /*
64 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
65 4.4BSD CHANGE NLM_F_REPLACE
66
67 True CHANGE NLM_F_CREATE|NLM_F_REPLACE
68 Append NLM_F_CREATE
69 Check NLM_F_EXCL
70 */
71
72 #define NLMSG_ALIGNTO 4
73 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
74 #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
75 #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
76 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
77 #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
78 #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
79 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
80 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
81 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
82 (nlh)->nlmsg_len <= (len))
83 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
84
85 #define NLMSG_NOOP 0x1 /* Nothing. */
86 #define NLMSG_ERROR 0x2 /* Error */
87 #define NLMSG_DONE 0x3 /* End of a dump */
88 #define NLMSG_OVERRUN 0x4 /* Data lost */
89
90 #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
91
92 struct nlmsgerr
93 {
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
102 struct nl_pktinfo
103 {
104 __u32 group;
105 };
106
107 #define NET_MAJOR 36 /* Major 36 is reserved for networking */
108
109 enum {
110 NETLINK_UNCONNECTED = 0,
111 NETLINK_CONNECTED,
112 };
113
114 /*
115 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
116 * +---------------------+- - -+- - - - - - - - - -+- - -+
117 * | Header | Pad | Payload | Pad |
118 * | (struct nlattr) | ing | | ing |
119 * +---------------------+- - -+- - - - - - - - - -+- - -+
120 * <-------------- nlattr->nla_len -------------->
121 */
122
123 struct nlattr
124 {
125 __u16 nla_len;
126 __u16 nla_type;
127 };
128
129 #define NLA_ALIGNTO 4
130 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
131 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
132
133 #ifdef __KERNEL__
134
135 #include <linux/capability.h>
136 #include <linux/skbuff.h>
137
138 struct netlink_skb_parms
139 {
140 struct ucred creds; /* Skb credentials */
141 __u32 pid;
142 __u32 dst_pid;
143 __u32 dst_group;
144 kernel_cap_t eff_cap;
145 __u32 loginuid; /* Login (audit) uid */
146 __u32 sid; /* SELinux security id */
147 };
148
149 #define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
150 #define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds)
151
152
153 extern struct sock *netlink_kernel_create(int unit, unsigned int groups, void (*input)(struct sock *sk, int len), struct module *module);
154 extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
155 extern int netlink_has_listeners(struct sock *sk, unsigned int group);
156 extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);
157 extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
158 __u32 group, gfp_t allocation);
159 extern void netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code);
160 extern int netlink_register_notifier(struct notifier_block *nb);
161 extern int netlink_unregister_notifier(struct notifier_block *nb);
162
163 /* finegrained unicast helpers: */
164 struct sock *netlink_getsockbyfilp(struct file *filp);
165 int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock,
166 long timeo, struct sock *ssk);
167 void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
168 int netlink_sendskb(struct sock *sk, struct sk_buff *skb, int protocol);
169
170 /*
171 * skb should fit one page. This choice is good for headerless malloc.
172 */
173 #define NLMSG_GOODORDER 0
174 #define NLMSG_GOODSIZE (SKB_MAX_ORDER(0, NLMSG_GOODORDER))
175
176
177 struct netlink_callback
178 {
179 struct sk_buff *skb;
180 struct nlmsghdr *nlh;
181 int (*dump)(struct sk_buff * skb, struct netlink_callback *cb);
182 int (*done)(struct netlink_callback *cb);
183 int family;
184 long args[5];
185 };
186
187 struct netlink_notify
188 {
189 int pid;
190 int protocol;
191 };
192
193 static __inline__ struct nlmsghdr *
194 __nlmsg_put(struct sk_buff *skb, __u32 pid, __u32 seq, int type, int len, int flags)
195 {
196 struct nlmsghdr *nlh;
197 int size = NLMSG_LENGTH(len);
198
199 nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
200 nlh->nlmsg_type = type;
201 nlh->nlmsg_len = size;
202 nlh->nlmsg_flags = flags;
203 nlh->nlmsg_pid = pid;
204 nlh->nlmsg_seq = seq;
205 memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
206 return nlh;
207 }
208
209 #define NLMSG_NEW(skb, pid, seq, type, len, flags) \
210 ({ if (skb_tailroom(skb) < (int)NLMSG_SPACE(len)) \
211 goto nlmsg_failure; \
212 __nlmsg_put(skb, pid, seq, type, len, flags); })
213
214 #define NLMSG_PUT(skb, pid, seq, type, len) \
215 NLMSG_NEW(skb, pid, seq, type, len, 0)
216
217 #define NLMSG_NEW_ANSWER(skb, cb, type, len, flags) \
218 NLMSG_NEW(skb, NETLINK_CB((cb)->skb).pid, \
219 (cb)->nlh->nlmsg_seq, type, len, flags)
220
221 #define NLMSG_END(skb, nlh) \
222 ({ (nlh)->nlmsg_len = (skb)->tail - (unsigned char *) (nlh); \
223 (skb)->len; })
224
225 #define NLMSG_CANCEL(skb, nlh) \
226 ({ skb_trim(skb, (unsigned char *) (nlh) - (skb)->data); \
227 -1; })
228
229 extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
230 struct nlmsghdr *nlh,
231 int (*dump)(struct sk_buff *skb, struct netlink_callback*),
232 int (*done)(struct netlink_callback*));
233
234
235 #define NL_NONROOT_RECV 0x1
236 #define NL_NONROOT_SEND 0x2
237 extern void netlink_set_nonroot(int protocol, unsigned flag);
238
239 #endif /* __KERNEL__ */
240
241 #endif /* __LINUX_NETLINK_H */