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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
29 #define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
30 #define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
31 #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
32
33 #define MAXMIFS 32
34 typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
35 typedef unsigned short mifi_t;
36 #define ALL_MIFS ((mifi_t)(-1))
37
38 #ifndef IF_SETSIZE
39 #define IF_SETSIZE 256
40 #endif
41
42 typedef __u32 if_mask;
43 #define NIFBITS (sizeof(if_mask) * 8) /* bits per mask */
44
45 #if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
46 #define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
47 #endif
48
49 typedef struct if_set {
50 if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
51 } if_set;
52
53 #define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
54 #define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
55 #define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
56 #define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
57 #define IF_ZERO(p) bzero(p, sizeof(*(p)))
58
59 /*
60 * Passed by mrouted for an MRT_ADD_MIF - again we use the
61 * mrouted 3.6 structures for compatibility
62 */
63
64 struct mif6ctl {
65 mifi_t mif6c_mifi; /* Index of MIF */
66 unsigned char mif6c_flags; /* MIFF_ flags */
67 unsigned char vifc_threshold; /* ttl limit */
68 __u16 mif6c_pifi; /* the index of the physical IF */
69 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
70 };
71
72 #define MIFF_REGISTER 0x1 /* register vif */
73
74 /*
75 * Cache manipulation structures for mrouted and PIMd
76 */
77
78 struct mf6cctl
79 {
80 struct sockaddr_in6 mf6cc_origin; /* Origin of mcast */
81 struct sockaddr_in6 mf6cc_mcastgrp; /* Group in question */
82 mifi_t mf6cc_parent; /* Where it arrived */
83 struct if_set mf6cc_ifset; /* Where it is going */
84 };
85
86 /*
87 * Group count retrieval for pim6sd
88 */
89
90 struct sioc_sg_req6
91 {
92 struct sockaddr_in6 src;
93 struct sockaddr_in6 grp;
94 unsigned long pktcnt;
95 unsigned long bytecnt;
96 unsigned long wrong_if;
97 };
98
99 /*
100 * To get vif packet counts
101 */
102
103 struct sioc_mif_req6
104 {
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
123 static inline int ip6_mroute_opt(int opt)
124 {
125 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
126 }
127 #else
128 static inline int ip6_mroute_opt(int opt)
129 {
130 return 0;
131 }
132 #endif
133
134 struct sock;
135
136 #ifdef CONFIG_IPV6_MROUTE
137 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
138 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
139 extern int ip6_mr_input(struct sk_buff *skb);
140 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
141 extern int ip6_mr_init(void);
142 extern void ip6_mr_cleanup(void);
143 #else
144 static inline
145 int ip6_mroute_setsockopt(struct sock *sock,
146 int optname, char __user *optval, unsigned int optlen)
147 {
148 return -ENOPROTOOPT;
149 }
150
151 static inline
152 int ip6_mroute_getsockopt(struct sock *sock,
153 int optname, char __user *optval, int __user *optlen)
154 {
155 return -ENOPROTOOPT;
156 }
157
158 static inline
159 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
160 {
161 return -ENOIOCTLCMD;
162 }
163
164 static inline int ip6_mr_init(void)
165 {
166 return 0;
167 }
168
169 static inline void ip6_mr_cleanup(void)
170 {
171 return;
172 }
173 #endif
174
175 struct mif_device
176 {
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
188 struct mfc6_cache
189 {
190 struct mfc6_cache *next; /* Next entry on cache line */
191 #ifdef CONFIG_NET_NS
192 struct net *mfc6_net;
193 #endif
194 struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
195 struct in6_addr mf6c_origin; /* Source of packet */
196 mifi_t mf6c_parent; /* Source interface */
197 int mfc_flags; /* Flags on line */
198
199 union {
200 struct {
201 unsigned long expires;
202 struct sk_buff_head unresolved; /* Unresolved buffers */
203 } unres;
204 struct {
205 unsigned long last_assert;
206 int minvif;
207 int maxvif;
208 unsigned long bytes;
209 unsigned long pkt;
210 unsigned long wrong_if;
211 unsigned char ttls[MAXMIFS]; /* TTL thresholds */
212 } res;
213 } mfc_un;
214 };
215
216 static inline
217 struct net *mfc6_net(const struct mfc6_cache *mfc)
218 {
219 return read_pnet(&mfc->mfc6_net);
220 }
221
222 static inline
223 void mfc6_net_set(struct mfc6_cache *mfc, struct net *net)
224 {
225 write_pnet(&mfc->mfc6_net, hold_net(net));
226 }
227
228 #define MFC_STATIC 1
229 #define MFC_NOTIFY 2
230
231 #define MFC6_LINES 64
232
233 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
234 (__force u32)(a)->s6_addr32[1] ^ \
235 (__force u32)(a)->s6_addr32[2] ^ \
236 (__force u32)(a)->s6_addr32[3] ^ \
237 (__force u32)(g)->s6_addr32[0] ^ \
238 (__force u32)(g)->s6_addr32[1] ^ \
239 (__force u32)(g)->s6_addr32[2] ^ \
240 (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
241
242 #define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
243
244 #endif
245
246 #ifdef __KERNEL__
247 struct rtmsg;
248 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
249 struct rtmsg *rtm, int nowait);
250
251 #ifdef CONFIG_IPV6_MROUTE
252 static inline struct sock *mroute6_socket(struct net *net)
253 {
254 return net->ipv6.mroute6_sk;
255 }
256 extern int ip6mr_sk_done(struct sock *sk);
257 #else
258 static inline struct sock *mroute6_socket(struct net *net) { return NULL; }
259 static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
260 #endif
261 #endif
262
263 /*
264 * Structure used to communicate from kernel to multicast router.
265 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
266 * used for IPv4 implementation). This is because this structure will be passed via an
267 * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
268 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
269 */
270
271 struct mrt6msg {
272 #define MRT6MSG_NOCACHE 1
273 #define MRT6MSG_WRONGMIF 2
274 #define MRT6MSG_WHOLEPKT 3 /* used for use level encap */
275 __u8 im6_mbz; /* must be zero */
276 __u8 im6_msgtype; /* what type of message */
277 __u16 im6_mif; /* mif rec'd on */
278 __u32 im6_pad; /* padding for 64 bit arch */
279 struct in6_addr im6_src, im6_dst;
280 };
281
282 #endif