diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /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.h | 188 |
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 | |||
25 | struct 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 | |||
33 | struct 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 | |||
87 | struct nlmsgerr | ||
88 | { | ||
89 | int error; | ||
90 | struct nlmsghdr msg; | ||
91 | }; | ||
92 | |||
93 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ | ||
94 | |||
95 | enum { | ||
96 | NETLINK_UNCONNECTED = 0, | ||
97 | NETLINK_CONNECTED, | ||
98 | }; | ||
99 | |||
100 | #ifdef __KERNEL__ | ||
101 | |||
102 | #include <linux/capability.h> | ||
103 | #include <linux/skbuff.h> | ||
104 | |||
105 | struct 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 | |||
119 | extern struct sock *netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len)); | ||
120 | extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err); | ||
121 | extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock); | ||
122 | extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid, | ||
123 | __u32 group, int allocation); | ||
124 | extern void netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code); | ||
125 | extern int netlink_register_notifier(struct notifier_block *nb); | ||
126 | extern int netlink_unregister_notifier(struct notifier_block *nb); | ||
127 | |||
128 | /* finegrained unicast helpers: */ | ||
129 | struct sock *netlink_getsockbyfilp(struct file *filp); | ||
130 | int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, long timeo); | ||
131 | void netlink_detachskb(struct sock *sk, struct sk_buff *skb); | ||
132 | int 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 | |||
141 | struct 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 | |||
151 | struct netlink_notify | ||
152 | { | ||
153 | int pid; | ||
154 | int protocol; | ||
155 | }; | ||
156 | |||
157 | static __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 | |||
176 | extern 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 | ||
184 | extern void netlink_set_nonroot(int protocol, unsigned flag); | ||
185 | |||
186 | #endif /* __KERNEL__ */ | ||
187 | |||
188 | #endif /* __LINUX_NETLINK_H */ | ||