Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef __LINUX_MROUTE6_H
2#define __LINUX_MROUTE6_H
3
4#include <linux/types.h>
5#include <linux/sockios.h>
6
7/*
8 * Based on the MROUTING 3.5 defines primarily to keep
9 * source compatibility with BSD.
10 *
11 * See the pim6sd code for the original history.
12 *
13 * Protocol Independent Multicast (PIM) data structures included
14 * Carlos Picoto (cap@di.fc.ul.pt)
15 *
16 */
17
18#define MRT6_BASE 200
19#define MRT6_INIT (MRT6_BASE) /* Activate the kernel mroute code */
20#define MRT6_DONE (MRT6_BASE+1) /* Shutdown the kernel mroute */
21#define MRT6_ADD_MIF (MRT6_BASE+2) /* Add a virtual interface */
22#define MRT6_DEL_MIF (MRT6_BASE+3) /* Delete a virtual interface */
23#define MRT6_ADD_MFC (MRT6_BASE+4) /* Add a multicast forwarding entry */
24#define MRT6_DEL_MFC (MRT6_BASE+5) /* Delete a multicast forwarding entry */
25#define MRT6_VERSION (MRT6_BASE+6) /* Get the kernel multicast version */
26#define MRT6_ASSERT (MRT6_BASE+7) /* Activate PIM assert mode */
27#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
28#define MRT6_TABLE (MRT6_BASE+9) /* Specify mroute table ID */
29
30#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
31#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
32#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
33
34#define MAXMIFS 32
35typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
36typedef unsigned short mifi_t;
37#define ALL_MIFS ((mifi_t)(-1))
38
39#ifndef IF_SETSIZE
40#define IF_SETSIZE 256
41#endif
42
43typedef __u32 if_mask;
44#define NIFBITS (sizeof(if_mask) * 8) /* bits per mask */
45
46#if !defined(__KERNEL__)
47#if !defined(DIV_ROUND_UP)
48#define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
49#endif
50#endif
51
52typedef struct if_set {
53 if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
54} if_set;
55
56#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
57#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
58#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
59#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
60#define IF_ZERO(p) bzero(p, sizeof(*(p)))
61
62/*
63 * Passed by mrouted for an MRT_ADD_MIF - again we use the
64 * mrouted 3.6 structures for compatibility
65 */
66
67struct mif6ctl {
68 mifi_t mif6c_mifi; /* Index of MIF */
69 unsigned char mif6c_flags; /* MIFF_ flags */
70 unsigned char vifc_threshold; /* ttl limit */
71 __u16 mif6c_pifi; /* the index of the physical IF */
72 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
73};
74
75#define MIFF_REGISTER 0x1 /* register vif */
76
77/*
78 * Cache manipulation structures for mrouted and PIMd
79 */
80
81struct mf6cctl {
82 struct sockaddr_in6 mf6cc_origin; /* Origin of mcast */
83 struct sockaddr_in6 mf6cc_mcastgrp; /* Group in question */
84 mifi_t mf6cc_parent; /* Where it arrived */
85 struct if_set mf6cc_ifset; /* Where it is going */
86};
87
88/*
89 * Group count retrieval for pim6sd
90 */
91
92struct sioc_sg_req6 {
93 struct sockaddr_in6 src;
94 struct sockaddr_in6 grp;
95 unsigned long pktcnt;
96 unsigned long bytecnt;
97 unsigned long wrong_if;
98};
99
100/*
101 * To get vif packet counts
102 */
103
104struct sioc_mif_req6 {
105 mifi_t mifi; /* Which iface */
106 unsigned long icount; /* In packets */
107 unsigned long ocount; /* Out packets */
108 unsigned long ibytes; /* In bytes */
109 unsigned long obytes; /* Out bytes */
110};
111
112/*
113 * That's all usermode folks
114 */
115
116#ifdef __KERNEL__
117
118#include <linux/pim.h>
119#include <linux/skbuff.h> /* for struct sk_buff_head */
120#include <net/net_namespace.h>
121
122#ifdef CONFIG_IPV6_MROUTE
123static inline int ip6_mroute_opt(int opt)
124{
125 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
126}
127#else
128static inline int ip6_mroute_opt(int opt)
129{
130 return 0;
131}
132#endif
133
134struct sock;
135
136#ifdef CONFIG_IPV6_MROUTE
137extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
138extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
139extern int ip6_mr_input(struct sk_buff *skb);
140extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
141extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
142extern int ip6_mr_init(void);
143extern void ip6_mr_cleanup(void);
144#else
145static inline
146int ip6_mroute_setsockopt(struct sock *sock,
147 int optname, char __user *optval, unsigned int optlen)
148{
149 return -ENOPROTOOPT;
150}
151
152static inline
153int ip6_mroute_getsockopt(struct sock *sock,
154 int optname, char __user *optval, int __user *optlen)
155{
156 return -ENOPROTOOPT;
157}
158
159static inline
160int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
161{
162 return -ENOIOCTLCMD;
163}
164
165static inline int ip6_mr_init(void)
166{
167 return 0;
168}
169
170static inline void ip6_mr_cleanup(void)
171{
172 return;
173}
174#endif
175
176struct mif_device {
177 struct net_device *dev; /* Device we are using */
178 unsigned long bytes_in,bytes_out;
179 unsigned long pkt_in,pkt_out; /* Statistics */
180 unsigned long rate_limit; /* Traffic shaping (NI) */
181 unsigned char threshold; /* TTL threshold */
182 unsigned short flags; /* Control flags */
183 int link; /* Physical interface index */
184};
185
186#define VIFF_STATIC 0x8000
187
188struct mfc6_cache {
189 struct list_head list;
190 struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
191 struct in6_addr mf6c_origin; /* Source of packet */
192 mifi_t mf6c_parent; /* Source interface */
193 int mfc_flags; /* Flags on line */
194
195 union {
196 struct {
197 unsigned long expires;
198 struct sk_buff_head unresolved; /* Unresolved buffers */
199 } unres;
200 struct {
201 unsigned long last_assert;
202 int minvif;
203 int maxvif;
204 unsigned long bytes;
205 unsigned long pkt;
206 unsigned long wrong_if;
207 unsigned char ttls[MAXMIFS]; /* TTL thresholds */
208 } res;
209 } mfc_un;
210};
211
212#define MFC_STATIC 1
213#define MFC_NOTIFY 2
214
215#define MFC6_LINES 64
216
217#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
218 (__force u32)(a)->s6_addr32[1] ^ \
219 (__force u32)(a)->s6_addr32[2] ^ \
220 (__force u32)(a)->s6_addr32[3] ^ \
221 (__force u32)(g)->s6_addr32[0] ^ \
222 (__force u32)(g)->s6_addr32[1] ^ \
223 (__force u32)(g)->s6_addr32[2] ^ \
224 (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
225
226#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
227
228#endif
229
230#ifdef __KERNEL__
231struct rtmsg;
232extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
233 struct rtmsg *rtm, int nowait);
234
235#ifdef CONFIG_IPV6_MROUTE
236extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
237extern int ip6mr_sk_done(struct sock *sk);
238#else
239static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
240{
241 return NULL;
242}
243static inline int ip6mr_sk_done(struct sock *sk)
244{
245 return 0;
246}
247#endif
248#endif
249
250/*
251 * Structure used to communicate from kernel to multicast router.
252 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
253 * used for IPv4 implementation). This is because this structure will be passed via an
254 * IPv6 raw socket, on which an application will only receiver the payload i.e the data after
255 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
256 */
257
258struct mrt6msg {
259#define MRT6MSG_NOCACHE 1
260#define MRT6MSG_WRONGMIF 2
261#define MRT6MSG_WHOLEPKT 3 /* used for use level encap */
262 __u8 im6_mbz; /* must be zero */
263 __u8 im6_msgtype; /* what type of message */
264 __u16 im6_mif; /* mif rec'd on */
265 __u32 im6_pad; /* padding for 64 bit arch */
266 struct in6_addr im6_src, im6_dst;
267};
268
269#endif