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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/netlink.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/netlink.h')
-rw-r--r--include/linux/netlink.h188
1 files changed, 188 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
new file mode 100644
index 000000000000..f731abdc1a29
--- /dev/null
+++ b/include/linux/netlink.h
@@ -0,0 +1,188 @@
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_SKIP 1 /* Reserved for ENskip */
9#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
10#define NETLINK_FIREWALL 3 /* Firewalling hook */
11#define NETLINK_TCPDIAG 4 /* TCP 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_ARPD 8
16#define NETLINK_AUDIT 9 /* auditing */
17#define NETLINK_ROUTE6 11 /* af_inet6 route comm channel */
18#define NETLINK_IP6_FW 13
19#define NETLINK_DNRTMSG 14 /* DECnet routing messages */
20#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
21#define NETLINK_TAPBASE 16 /* 16 to 31 are ethertap */
22
23#define MAX_LINKS 32
24
25struct sockaddr_nl
26{
27 sa_family_t nl_family; /* AF_NETLINK */
28 unsigned short nl_pad; /* zero */
29 __u32 nl_pid; /* process pid */
30 __u32 nl_groups; /* multicast groups mask */
31};
32
33struct nlmsghdr
34{
35 __u32 nlmsg_len; /* Length of message including header */
36 __u16 nlmsg_type; /* Message content */
37 __u16 nlmsg_flags; /* Additional flags */
38 __u32 nlmsg_seq; /* Sequence number */
39 __u32 nlmsg_pid; /* Sending process PID */
40};
41
42/* Flags values */
43
44#define NLM_F_REQUEST 1 /* It is request message. */
45#define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
46#define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
47#define NLM_F_ECHO 8 /* Echo this request */
48
49/* Modifiers to GET request */
50#define NLM_F_ROOT 0x100 /* specify tree root */
51#define NLM_F_MATCH 0x200 /* return all matching */
52#define NLM_F_ATOMIC 0x400 /* atomic GET */
53#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
54
55/* Modifiers to NEW request */
56#define NLM_F_REPLACE 0x100 /* Override existing */
57#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
58#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
59#define NLM_F_APPEND 0x800 /* Add to end of list */
60
61/*
62 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
63 4.4BSD CHANGE NLM_F_REPLACE
64
65 True CHANGE NLM_F_CREATE|NLM_F_REPLACE
66 Append NLM_F_CREATE
67 Check NLM_F_EXCL
68 */
69
70#define NLMSG_ALIGNTO 4
71#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
72#define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr)))
73#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
74#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
75#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
76 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
77#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
78 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
79 (nlh)->nlmsg_len <= (len))
80#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
81
82#define NLMSG_NOOP 0x1 /* Nothing. */
83#define NLMSG_ERROR 0x2 /* Error */
84#define NLMSG_DONE 0x3 /* End of a dump */
85#define NLMSG_OVERRUN 0x4 /* Data lost */
86
87struct nlmsgerr
88{
89 int error;
90 struct nlmsghdr msg;
91};
92
93#define NET_MAJOR 36 /* Major 36 is reserved for networking */
94
95enum {
96 NETLINK_UNCONNECTED = 0,
97 NETLINK_CONNECTED,
98};
99
100#ifdef __KERNEL__
101
102#include <linux/capability.h>
103#include <linux/skbuff.h>
104
105struct netlink_skb_parms
106{
107 struct ucred creds; /* Skb credentials */
108 __u32 pid;
109 __u32 groups;
110 __u32 dst_pid;
111 __u32 dst_groups;
112 kernel_cap_t eff_cap;
113};
114
115#define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
116#define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds)
117
118
119extern struct sock *netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len));
120extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
121extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);
122extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
123 __u32 group, int allocation);
124extern void netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code);
125extern int netlink_register_notifier(struct notifier_block *nb);
126extern int netlink_unregister_notifier(struct notifier_block *nb);
127
128/* finegrained unicast helpers: */
129struct sock *netlink_getsockbyfilp(struct file *filp);
130int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, long timeo);
131void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
132int netlink_sendskb(struct sock *sk, struct sk_buff *skb, int protocol);
133
134/*
135 * skb should fit one page. This choice is good for headerless malloc.
136 */
137#define NLMSG_GOODORDER 0
138#define NLMSG_GOODSIZE (SKB_MAX_ORDER(0, NLMSG_GOODORDER))
139
140
141struct netlink_callback
142{
143 struct sk_buff *skb;
144 struct nlmsghdr *nlh;
145 int (*dump)(struct sk_buff * skb, struct netlink_callback *cb);
146 int (*done)(struct netlink_callback *cb);
147 int family;
148 long args[4];
149};
150
151struct netlink_notify
152{
153 int pid;
154 int protocol;
155};
156
157static __inline__ struct nlmsghdr *
158__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len)
159{
160 struct nlmsghdr *nlh;
161 int size = NLMSG_LENGTH(len);
162
163 nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
164 nlh->nlmsg_type = type;
165 nlh->nlmsg_len = size;
166 nlh->nlmsg_flags = 0;
167 nlh->nlmsg_pid = pid;
168 nlh->nlmsg_seq = seq;
169 return nlh;
170}
171
172#define NLMSG_PUT(skb, pid, seq, type, len) \
173({ if (skb_tailroom(skb) < (int)NLMSG_SPACE(len)) goto nlmsg_failure; \
174 __nlmsg_put(skb, pid, seq, type, len); })
175
176extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
177 struct nlmsghdr *nlh,
178 int (*dump)(struct sk_buff *skb, struct netlink_callback*),
179 int (*done)(struct netlink_callback*));
180
181
182#define NL_NONROOT_RECV 0x1
183#define NL_NONROOT_SEND 0x2
184extern void netlink_set_nonroot(int protocol, unsigned flag);
185
186#endif /* __KERNEL__ */
187
188#endif /* __LINUX_NETLINK_H */