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