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
ip6_mroute_opt(int opt)121 static inline int ip6_mroute_opt(int opt)
122 {
123 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
124 }
125 #else
ip6_mroute_opt(int opt)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 ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
140 extern int ip6_mr_init(void);
141 extern void ip6_mr_cleanup(void);
142 #else
143 static inline
ip6_mroute_setsockopt(struct sock * sock,int optname,char __user * optval,unsigned int optlen)144 int ip6_mroute_setsockopt(struct sock *sock,
145 int optname, char __user *optval, unsigned int optlen)
146 {
147 return -ENOPROTOOPT;
148 }
149
150 static inline
ip6_mroute_getsockopt(struct sock * sock,int optname,char __user * optval,int __user * optlen)151 int ip6_mroute_getsockopt(struct sock *sock,
152 int optname, char __user *optval, int __user *optlen)
153 {
154 return -ENOPROTOOPT;
155 }
156
157 static inline
ip6mr_ioctl(struct sock * sk,int cmd,void __user * arg)158 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
159 {
160 return -ENOIOCTLCMD;
161 }
162
ip6_mr_init(void)163 static inline int ip6_mr_init(void)
164 {
165 return 0;
166 }
167
ip6_mr_cleanup(void)168 static inline void ip6_mr_cleanup(void)
169 {
170 return;
171 }
172 #endif
173
174 struct mif_device {
175 struct net_device *dev; /* Device we are using */
176 unsigned long bytes_in,bytes_out;
177 unsigned long pkt_in,pkt_out; /* Statistics */
178 unsigned long rate_limit; /* Traffic shaping (NI) */
179 unsigned char threshold; /* TTL threshold */
180 unsigned short flags; /* Control flags */
181 int link; /* Physical interface index */
182 };
183
184 #define VIFF_STATIC 0x8000
185
186 struct mfc6_cache {
187 struct list_head list;
188 struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
189 struct in6_addr mf6c_origin; /* Source of packet */
190 mifi_t mf6c_parent; /* Source interface */
191 int mfc_flags; /* Flags on line */
192
193 union {
194 struct {
195 unsigned long expires;
196 struct sk_buff_head unresolved; /* Unresolved buffers */
197 } unres;
198 struct {
199 unsigned long last_assert;
200 int minvif;
201 int maxvif;
202 unsigned long bytes;
203 unsigned long pkt;
204 unsigned long wrong_if;
205 unsigned char ttls[MAXMIFS]; /* TTL thresholds */
206 } res;
207 } mfc_un;
208 };
209
210 #define MFC_STATIC 1
211 #define MFC_NOTIFY 2
212
213 #define MFC6_LINES 64
214
215 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
216 (__force u32)(a)->s6_addr32[1] ^ \
217 (__force u32)(a)->s6_addr32[2] ^ \
218 (__force u32)(a)->s6_addr32[3] ^ \
219 (__force u32)(g)->s6_addr32[0] ^ \
220 (__force u32)(g)->s6_addr32[1] ^ \
221 (__force u32)(g)->s6_addr32[2] ^ \
222 (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
223
224 #define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
225
226 #endif
227
228 #ifdef __KERNEL__
229 struct rtmsg;
230 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
231 struct rtmsg *rtm, int nowait);
232
233 #ifdef CONFIG_IPV6_MROUTE
234 extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
235 extern int ip6mr_sk_done(struct sock *sk);
236 #else
mroute6_socket(struct net * net,struct sk_buff * skb)237 static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
238 {
239 return NULL;
240 }
ip6mr_sk_done(struct sock * sk)241 static inline int ip6mr_sk_done(struct sock *sk)
242 {
243 return 0;
244 }
245 #endif
246 #endif
247
248 /*
249 * Structure used to communicate from kernel to multicast router.
250 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
251 * used for IPv4 implementation). This is because this structure will be passed via an
252 * IPv6 raw socket, on which an application will only receiver the payload i.e the data after
253 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
254 */
255
256 struct mrt6msg {
257 #define MRT6MSG_NOCACHE 1
258 #define MRT6MSG_WRONGMIF 2
259 #define MRT6MSG_WHOLEPKT 3 /* used for use level encap */
260 __u8 im6_mbz; /* must be zero */
261 __u8 im6_msgtype; /* what type of message */
262 __u16 im6_mif; /* mif rec'd on */
263 __u32 im6_pad; /* padding for 64 bit arch */
264 struct in6_addr im6_src, im6_dst;
265 };
266
267 #endif
268