1#ifndef __LINUX_MROUTE_H
2#define __LINUX_MROUTE_H
3
4#include <linux/sockios.h>
5#include <linux/in.h>
6
7/*
8 *	Based on the MROUTING 3.5 defines primarily to keep
9 *	source compatibility with BSD.
10 *
11 *	See the mrouted 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 MRT_BASE	200
19#define MRT_INIT	(MRT_BASE)	/* Activate the kernel mroute code 	*/
20#define MRT_DONE	(MRT_BASE+1)	/* Shutdown the kernel mroute		*/
21#define MRT_ADD_VIF	(MRT_BASE+2)	/* Add a virtual interface		*/
22#define MRT_DEL_VIF	(MRT_BASE+3)	/* Delete a virtual interface		*/
23#define MRT_ADD_MFC	(MRT_BASE+4)	/* Add a multicast forwarding entry	*/
24#define MRT_DEL_MFC	(MRT_BASE+5)	/* Delete a multicast forwarding entry	*/
25#define MRT_VERSION	(MRT_BASE+6)	/* Get the kernel multicast version	*/
26#define MRT_ASSERT	(MRT_BASE+7)	/* Activate PIM assert mode		*/
27#define MRT_PIM		(MRT_BASE+8)	/* enable PIM code	*/
28
29#define SIOCGETVIFCNT	SIOCPROTOPRIVATE	/* IP protocol privates */
30#define SIOCGETSGCNT	(SIOCPROTOPRIVATE+1)
31#define SIOCGETRPF	(SIOCPROTOPRIVATE+2)
32
33#define MAXVIFS		32
34typedef unsigned long vifbitmap_t;	/* User mode code depends on this lot */
35typedef unsigned short vifi_t;
36#define ALL_VIFS	((vifi_t)(-1))
37
38/*
39 *	Same idea as select
40 */
41
42#define VIFM_SET(n,m)	((m)|=(1<<(n)))
43#define VIFM_CLR(n,m)	((m)&=~(1<<(n)))
44#define VIFM_ISSET(n,m)	((m)&(1<<(n)))
45#define VIFM_CLRALL(m)	((m)=0)
46#define VIFM_COPY(mfrom,mto)	((mto)=(mfrom))
47#define VIFM_SAME(m1,m2)	((m1)==(m2))
48
49/*
50 *	Passed by mrouted for an MRT_ADD_VIF - again we use the
51 *	mrouted 3.6 structures for compatibility
52 */
53
54struct vifctl {
55	vifi_t	vifc_vifi;		/* Index of VIF */
56	unsigned char vifc_flags;	/* VIFF_ flags */
57	unsigned char vifc_threshold;	/* ttl limit */
58	unsigned int vifc_rate_limit;	/* Rate limiter values (NI) */
59	struct in_addr vifc_lcl_addr;	/* Our address */
60	struct in_addr vifc_rmt_addr;	/* IPIP tunnel addr */
61};
62
63#define VIFF_TUNNEL	0x1	/* IPIP tunnel */
64#define VIFF_SRCRT	0x2	/* NI */
65#define VIFF_REGISTER	0x4	/* register vif	*/
66
67/*
68 *	Cache manipulation structures for mrouted and PIMd
69 */
70
71struct mfcctl
72{
73	struct in_addr mfcc_origin;		/* Origin of mcast	*/
74	struct in_addr mfcc_mcastgrp;		/* Group in question	*/
75	vifi_t	mfcc_parent;			/* Where it arrived	*/
76	unsigned char mfcc_ttls[MAXVIFS];	/* Where it is going	*/
77	unsigned int mfcc_pkt_cnt;		/* pkt count for src-grp */
78	unsigned int mfcc_byte_cnt;
79	unsigned int mfcc_wrong_if;
80	int	     mfcc_expire;
81};
82
83/*
84 *	Group count retrieval for mrouted
85 */
86
87struct sioc_sg_req
88{
89	struct in_addr src;
90	struct in_addr grp;
91	unsigned long pktcnt;
92	unsigned long bytecnt;
93	unsigned long wrong_if;
94};
95
96/*
97 *	To get vif packet counts
98 */
99
100struct sioc_vif_req
101{
102	vifi_t	vifi;		/* Which iface */
103	unsigned long icount;	/* In packets */
104	unsigned long ocount;	/* Out packets */
105	unsigned long ibytes;	/* In bytes */
106	unsigned long obytes;	/* Out bytes */
107};
108
109/*
110 *	This is the format the mroute daemon expects to see IGMP control
111 *	data. Magically happens to be like an IP packet as per the original
112 */
113
114struct igmpmsg
115{
116	__u32 unused1,unused2;
117	unsigned char im_msgtype;		/* What is this */
118	unsigned char im_mbz;			/* Must be zero */
119	unsigned char im_vif;			/* Interface (this ought to be a vifi_t!) */
120	unsigned char unused3;
121	struct in_addr im_src,im_dst;
122};
123
124/*
125 *	That's all usermode folks
126 */
127
128#ifdef __KERNEL__
129extern int ip_mroute_setsockopt(struct sock *, int, char *, int);
130extern int ip_mroute_getsockopt(struct sock *, int, char *, int *);
131extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg);
132extern void ip_mr_init(void);
133
134
135struct vif_device
136{
137	struct net_device 	*dev;			/* Device we are using */
138	unsigned long	bytes_in,bytes_out;
139	unsigned long	pkt_in,pkt_out;		/* Statistics 			*/
140	unsigned long	rate_limit;		/* Traffic shaping (NI) 	*/
141	unsigned char	threshold;		/* TTL threshold 		*/
142	unsigned short	flags;			/* Control flags 		*/
143	__u32		local,remote;		/* Addresses(remote for tunnels)*/
144	int		link;			/* Physical interface index	*/
145};
146
147#define VIFF_STATIC 0x8000
148
149struct mfc_cache
150{
151	struct mfc_cache *next;			/* Next entry on cache line 	*/
152	__u32 mfc_mcastgrp;			/* Group the entry belongs to 	*/
153	__u32 mfc_origin;			/* Source of packet 		*/
154	vifi_t mfc_parent;			/* Source interface		*/
155	int mfc_flags;				/* Flags on line		*/
156
157	union {
158		struct {
159			unsigned long expires;
160			struct sk_buff_head unresolved;	/* Unresolved buffers		*/
161		} unres;
162		struct {
163			unsigned long last_assert;
164			int minvif;
165			int maxvif;
166			unsigned long bytes;
167			unsigned long pkt;
168			unsigned long wrong_if;
169			unsigned char ttls[MAXVIFS];	/* TTL thresholds		*/
170		} res;
171	} mfc_un;
172};
173
174#define MFC_STATIC		1
175#define MFC_NOTIFY		2
176
177#define MFC_LINES		64
178
179#ifdef __BIG_ENDIAN
180#define MFC_HASH(a,b)	((((a)>>24)^((b)>>26))&(MFC_LINES-1))
181#else
182#define MFC_HASH(a,b)	(((a)^((b)>>2))&(MFC_LINES-1))
183#endif
184
185#endif
186
187
188#define MFC_ASSERT_THRESH (3*HZ)		/* Maximal freq. of asserts */
189
190/*
191 *	Pseudo messages used by mrouted
192 */
193
194#define IGMPMSG_NOCACHE		1		/* Kern cache fill request to mrouted */
195#define IGMPMSG_WRONGVIF	2		/* For PIM assert processing (unused) */
196#define IGMPMSG_WHOLEPKT	3		/* For PIM Register processing */
197
198#ifdef __KERNEL__
199
200#define PIM_V1_VERSION		__constant_htonl(0x10000000)
201#define PIM_V1_REGISTER		1
202
203#define PIM_VERSION		2
204#define PIM_REGISTER		1
205
206#define PIM_NULL_REGISTER	__constant_htonl(0x40000000)
207
208/* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */
209
210struct pimreghdr
211{
212	__u8	type;
213	__u8	reserved;
214	__u16	csum;
215	__u32	flags;
216};
217
218extern int pim_rcv(struct sk_buff *);
219extern int pim_rcv_v1(struct sk_buff *);
220
221struct rtmsg;
222extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
223#endif
224
225#endif
226