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__)
47 #if !defined(DIV_ROUND_UP)
48 #define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
49 #endif
50 #endif
51
52 typedef 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
67 struct 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
81 struct 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
92 struct 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
104 struct 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
ip6_mroute_opt(int opt)123 static inline int ip6_mroute_opt(int opt)
124 {
125 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
126 }
127 #else
ip6_mroute_opt(int opt)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 ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
142 extern int ip6_mr_init(void);
143 extern void ip6_mr_cleanup(void);
144 #else
145 static inline
ip6_mroute_setsockopt(struct sock * sock,int optname,char __user * optval,unsigned int optlen)146 int ip6_mroute_setsockopt(struct sock *sock,
147 int optname, char __user *optval, unsigned int optlen)
148 {
149 return -ENOPROTOOPT;
150 }
151
152 static inline
ip6_mroute_getsockopt(struct sock * sock,int optname,char __user * optval,int __user * optlen)153 int ip6_mroute_getsockopt(struct sock *sock,
154 int optname, char __user *optval, int __user *optlen)
155 {
156 return -ENOPROTOOPT;
157 }
158
159 static inline
ip6mr_ioctl(struct sock * sk,int cmd,void __user * arg)160 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
161 {
162 return -ENOIOCTLCMD;
163 }
164
ip6_mr_init(void)165 static inline int ip6_mr_init(void)
166 {
167 return 0;
168 }
169
ip6_mr_cleanup(void)170 static inline void ip6_mr_cleanup(void)
171 {
172 return;
173 }
174 #endif
175
176 struct 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
188 struct 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__
231 struct rtmsg;
232 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
233 struct rtmsg *rtm, int nowait);
234
235 #ifdef CONFIG_IPV6_MROUTE
236 extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
237 extern int ip6mr_sk_done(struct sock *sk);
238 #else
mroute6_socket(struct net * net,struct sk_buff * skb)239 static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
240 {
241 return NULL;
242 }
ip6mr_sk_done(struct sock * sk)243 static 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
258 struct 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
270