1 #ifndef __LINUX_MROUTE_H
2 #define __LINUX_MROUTE_H
3
4 #include <linux/sockios.h>
5 #include <linux/types.h>
6 #ifdef __KERNEL__
7 #include <linux/in.h>
8 #endif
9
10 /*
11 * Based on the MROUTING 3.5 defines primarily to keep
12 * source compatibility with BSD.
13 *
14 * See the mrouted code for the original history.
15 *
16 * Protocol Independent Multicast (PIM) data structures included
17 * Carlos Picoto (cap@di.fc.ul.pt)
18 *
19 */
20
21 #define MRT_BASE 200
22 #define MRT_INIT (MRT_BASE) /* Activate the kernel mroute code */
23 #define MRT_DONE (MRT_BASE+1) /* Shutdown the kernel mroute */
24 #define MRT_ADD_VIF (MRT_BASE+2) /* Add a virtual interface */
25 #define MRT_DEL_VIF (MRT_BASE+3) /* Delete a virtual interface */
26 #define MRT_ADD_MFC (MRT_BASE+4) /* Add a multicast forwarding entry */
27 #define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */
28 #define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */
29 #define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */
30 #define MRT_PIM (MRT_BASE+8) /* enable PIM code */
31 #define MRT_TABLE (MRT_BASE+9) /* Specify mroute table ID */
32
33 #define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */
34 #define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
35 #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
36
37 #define MAXVIFS 32
38 typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
39 typedef unsigned short vifi_t;
40 #define ALL_VIFS ((vifi_t)(-1))
41
42 /*
43 * Same idea as select
44 */
45
46 #define VIFM_SET(n,m) ((m)|=(1<<(n)))
47 #define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
48 #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
49 #define VIFM_CLRALL(m) ((m)=0)
50 #define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
51 #define VIFM_SAME(m1,m2) ((m1)==(m2))
52
53 /*
54 * Passed by mrouted for an MRT_ADD_VIF - again we use the
55 * mrouted 3.6 structures for compatibility
56 */
57
58 struct vifctl {
59 vifi_t vifc_vifi; /* Index of VIF */
60 unsigned char vifc_flags; /* VIFF_ flags */
61 unsigned char vifc_threshold; /* ttl limit */
62 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
63 union {
64 struct in_addr vifc_lcl_addr; /* Local interface address */
65 int vifc_lcl_ifindex; /* Local interface index */
66 };
67 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */
68 };
69
70 #define VIFF_TUNNEL 0x1 /* IPIP tunnel */
71 #define VIFF_SRCRT 0x2 /* NI */
72 #define VIFF_REGISTER 0x4 /* register vif */
73 #define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of
74 vifc_lcl_addr to find an interface */
75
76 /*
77 * Cache manipulation structures for mrouted and PIMd
78 */
79
80 struct mfcctl {
81 struct in_addr mfcc_origin; /* Origin of mcast */
82 struct in_addr mfcc_mcastgrp; /* Group in question */
83 vifi_t mfcc_parent; /* Where it arrived */
84 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */
85 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */
86 unsigned int mfcc_byte_cnt;
87 unsigned int mfcc_wrong_if;
88 int mfcc_expire;
89 };
90
91 /*
92 * Group count retrieval for mrouted
93 */
94
95 struct sioc_sg_req {
96 struct in_addr src;
97 struct in_addr grp;
98 unsigned long pktcnt;
99 unsigned long bytecnt;
100 unsigned long wrong_if;
101 };
102
103 /*
104 * To get vif packet counts
105 */
106
107 struct sioc_vif_req {
108 vifi_t vifi; /* Which iface */
109 unsigned long icount; /* In packets */
110 unsigned long ocount; /* Out packets */
111 unsigned long ibytes; /* In bytes */
112 unsigned long obytes; /* Out bytes */
113 };
114
115 /*
116 * This is the format the mroute daemon expects to see IGMP control
117 * data. Magically happens to be like an IP packet as per the original
118 */
119
120 struct igmpmsg {
121 __u32 unused1,unused2;
122 unsigned char im_msgtype; /* What is this */
123 unsigned char im_mbz; /* Must be zero */
124 unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */
125 unsigned char unused3;
126 struct in_addr im_src,im_dst;
127 };
128
129 /*
130 * That's all usermode folks
131 */
132
133 #ifdef __KERNEL__
134 #include <linux/pim.h>
135 #include <net/sock.h>
136
137 #ifdef CONFIG_IP_MROUTE
ip_mroute_opt(int opt)138 static inline int ip_mroute_opt(int opt)
139 {
140 return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
141 }
142 #else
ip_mroute_opt(int opt)143 static inline int ip_mroute_opt(int opt)
144 {
145 return 0;
146 }
147 #endif
148
149 #ifdef CONFIG_IP_MROUTE
150 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
151 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
152 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
153 extern int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
154 extern int ip_mr_init(void);
155 #else
156 static inline
ip_mroute_setsockopt(struct sock * sock,int optname,char __user * optval,unsigned int optlen)157 int ip_mroute_setsockopt(struct sock *sock,
158 int optname, char __user *optval, unsigned int optlen)
159 {
160 return -ENOPROTOOPT;
161 }
162
163 static inline
ip_mroute_getsockopt(struct sock * sock,int optname,char __user * optval,int __user * optlen)164 int ip_mroute_getsockopt(struct sock *sock,
165 int optname, char __user *optval, int __user *optlen)
166 {
167 return -ENOPROTOOPT;
168 }
169
170 static inline
ipmr_ioctl(struct sock * sk,int cmd,void __user * arg)171 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
172 {
173 return -ENOIOCTLCMD;
174 }
175
ip_mr_init(void)176 static inline int ip_mr_init(void)
177 {
178 return 0;
179 }
180 #endif
181
182 struct vif_device {
183 struct net_device *dev; /* Device we are using */
184 unsigned long bytes_in,bytes_out;
185 unsigned long pkt_in,pkt_out; /* Statistics */
186 unsigned long rate_limit; /* Traffic shaping (NI) */
187 unsigned char threshold; /* TTL threshold */
188 unsigned short flags; /* Control flags */
189 __be32 local,remote; /* Addresses(remote for tunnels)*/
190 int link; /* Physical interface index */
191 };
192
193 #define VIFF_STATIC 0x8000
194
195 struct mfc_cache {
196 struct list_head list;
197 __be32 mfc_mcastgrp; /* Group the entry belongs to */
198 __be32 mfc_origin; /* Source of packet */
199 vifi_t mfc_parent; /* Source interface */
200 int mfc_flags; /* Flags on line */
201
202 union {
203 struct {
204 unsigned long expires;
205 struct sk_buff_head unresolved; /* Unresolved buffers */
206 } unres;
207 struct {
208 unsigned long last_assert;
209 int minvif;
210 int maxvif;
211 unsigned long bytes;
212 unsigned long pkt;
213 unsigned long wrong_if;
214 unsigned char ttls[MAXVIFS]; /* TTL thresholds */
215 } res;
216 } mfc_un;
217 struct rcu_head rcu;
218 };
219
220 #define MFC_STATIC 1
221 #define MFC_NOTIFY 2
222
223 #define MFC_LINES 64
224
225 #ifdef __BIG_ENDIAN
226 #define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
227 #else
228 #define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
229 #endif
230
231 #endif
232
233
234 #define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
235
236 /*
237 * Pseudo messages used by mrouted
238 */
239
240 #define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
241 #define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
242 #define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
243
244 #ifdef __KERNEL__
245 struct rtmsg;
246 extern int ipmr_get_route(struct net *net, struct sk_buff *skb,
247 struct rtmsg *rtm, int nowait);
248 #endif
249
250 #endif
251