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