1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI__LINUX_MROUTE_H
3 #define _UAPI__LINUX_MROUTE_H
4 
5 #include <linux/sockios.h>
6 #include <linux/types.h>
7 #include <linux/in.h>		/* For struct in_addr. */
8 
9 /* Based on the MROUTING 3.5 defines primarily to keep
10  * source compatibility with BSD.
11  *
12  * See the mrouted code for the original history.
13  *
14  * Protocol Independent Multicast (PIM) data structures included
15  * Carlos Picoto (cap@di.fc.ul.pt)
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 #define MRT_TABLE	(MRT_BASE+9)	/* Specify mroute table ID		*/
29 #define MRT_ADD_MFC_PROXY	(MRT_BASE+10)	/* Add a (*,*|G) mfc entry	*/
30 #define MRT_DEL_MFC_PROXY	(MRT_BASE+11)	/* Del a (*,*|G) mfc entry	*/
31 #define MRT_FLUSH	(MRT_BASE+12)	/* Flush all mfc entries and/or vifs	*/
32 #define MRT_MAX		(MRT_BASE+12)
33 
34 #define SIOCGETVIFCNT	SIOCPROTOPRIVATE	/* IP protocol privates */
35 #define SIOCGETSGCNT	(SIOCPROTOPRIVATE+1)
36 #define SIOCGETRPF	(SIOCPROTOPRIVATE+2)
37 
38 /* MRT_FLUSH optional flags */
39 #define MRT_FLUSH_MFC	1	/* Flush multicast entries */
40 #define MRT_FLUSH_MFC_STATIC	2	/* Flush static multicast entries */
41 #define MRT_FLUSH_VIFS	4	/* Flush multicast vifs */
42 #define MRT_FLUSH_VIFS_STATIC	8	/* Flush static multicast vifs */
43 
44 #define MAXVIFS		32
45 typedef unsigned long vifbitmap_t;	/* User mode code depends on this lot */
46 typedef unsigned short vifi_t;
47 #define ALL_VIFS	((vifi_t)(-1))
48 
49 /* Same idea as select */
50 
51 #define VIFM_SET(n,m)	((m)|=(1<<(n)))
52 #define VIFM_CLR(n,m)	((m)&=~(1<<(n)))
53 #define VIFM_ISSET(n,m)	((m)&(1<<(n)))
54 #define VIFM_CLRALL(m)	((m)=0)
55 #define VIFM_COPY(mfrom,mto)	((mto)=(mfrom))
56 #define VIFM_SAME(m1,m2)	((m1)==(m2))
57 
58 /* Passed by mrouted for an MRT_ADD_VIF - again we use the
59  * mrouted 3.6 structures for compatibility
60  */
61 struct vifctl {
62 	vifi_t	vifc_vifi;		/* Index of VIF */
63 	unsigned char vifc_flags;	/* VIFF_ flags */
64 	unsigned char vifc_threshold;	/* ttl limit */
65 	unsigned int vifc_rate_limit;	/* Rate limiter values (NI) */
66 	union {
67 		struct in_addr vifc_lcl_addr;     /* Local interface address */
68 		int            vifc_lcl_ifindex;  /* Local interface index   */
69 	};
70 	struct in_addr vifc_rmt_addr;	/* IPIP tunnel addr */
71 };
72 
73 #define VIFF_TUNNEL		0x1	/* IPIP tunnel */
74 #define VIFF_SRCRT		0x2	/* NI */
75 #define VIFF_REGISTER		0x4	/* register vif	*/
76 #define VIFF_USE_IFINDEX	0x8	/* use vifc_lcl_ifindex instead of
77 					   vifc_lcl_addr to find an interface */
78 
79 /* Cache manipulation structures for mrouted and PIMd */
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 /*  Group count retrieval for mrouted */
92 struct sioc_sg_req {
93 	struct in_addr src;
94 	struct in_addr grp;
95 	unsigned long pktcnt;
96 	unsigned long bytecnt;
97 	unsigned long wrong_if;
98 };
99 
100 /* To get vif packet counts */
101 struct sioc_vif_req {
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 /* This is the format the mroute daemon expects to see IGMP control
110  * data. Magically happens to be like an IP packet as per the original
111  */
112 struct igmpmsg {
113 	__u32 unused1,unused2;
114 	unsigned char im_msgtype;		/* What is this */
115 	unsigned char im_mbz;			/* Must be zero */
116 	unsigned char im_vif;			/* Low 8 bits of Interface */
117 	unsigned char im_vif_hi;		/* High 8 bits of Interface */
118 	struct in_addr im_src,im_dst;
119 };
120 
121 /* ipmr netlink table attributes */
122 enum {
123 	IPMRA_TABLE_UNSPEC,
124 	IPMRA_TABLE_ID,
125 	IPMRA_TABLE_CACHE_RES_QUEUE_LEN,
126 	IPMRA_TABLE_MROUTE_REG_VIF_NUM,
127 	IPMRA_TABLE_MROUTE_DO_ASSERT,
128 	IPMRA_TABLE_MROUTE_DO_PIM,
129 	IPMRA_TABLE_VIFS,
130 	IPMRA_TABLE_MROUTE_DO_WRVIFWHOLE,
131 	__IPMRA_TABLE_MAX
132 };
133 #define IPMRA_TABLE_MAX (__IPMRA_TABLE_MAX - 1)
134 
135 /* ipmr netlink vif attribute format
136  * [ IPMRA_TABLE_VIFS ] - nested attribute
137  *   [ IPMRA_VIF ] - nested attribute
138  *     [ IPMRA_VIFA_xxx ]
139  */
140 enum {
141 	IPMRA_VIF_UNSPEC,
142 	IPMRA_VIF,
143 	__IPMRA_VIF_MAX
144 };
145 #define IPMRA_VIF_MAX (__IPMRA_VIF_MAX - 1)
146 
147 /* vif-specific attributes */
148 enum {
149 	IPMRA_VIFA_UNSPEC,
150 	IPMRA_VIFA_IFINDEX,
151 	IPMRA_VIFA_VIF_ID,
152 	IPMRA_VIFA_FLAGS,
153 	IPMRA_VIFA_BYTES_IN,
154 	IPMRA_VIFA_BYTES_OUT,
155 	IPMRA_VIFA_PACKETS_IN,
156 	IPMRA_VIFA_PACKETS_OUT,
157 	IPMRA_VIFA_LOCAL_ADDR,
158 	IPMRA_VIFA_REMOTE_ADDR,
159 	IPMRA_VIFA_PAD,
160 	__IPMRA_VIFA_MAX
161 };
162 #define IPMRA_VIFA_MAX (__IPMRA_VIFA_MAX - 1)
163 
164 /* ipmr netlink cache report attributes */
165 enum {
166 	IPMRA_CREPORT_UNSPEC,
167 	IPMRA_CREPORT_MSGTYPE,
168 	IPMRA_CREPORT_VIF_ID,
169 	IPMRA_CREPORT_SRC_ADDR,
170 	IPMRA_CREPORT_DST_ADDR,
171 	IPMRA_CREPORT_PKT,
172 	IPMRA_CREPORT_TABLE,
173 	__IPMRA_CREPORT_MAX
174 };
175 #define IPMRA_CREPORT_MAX (__IPMRA_CREPORT_MAX - 1)
176 
177 /* That's all usermode folks */
178 
179 #define MFC_ASSERT_THRESH (3*HZ)		/* Maximal freq. of asserts */
180 
181 /* Pseudo messages used by mrouted */
182 #define IGMPMSG_NOCACHE		1		/* Kern cache fill request to mrouted */
183 #define IGMPMSG_WRONGVIF	2		/* For PIM assert processing (unused) */
184 #define IGMPMSG_WHOLEPKT	3		/* For PIM Register processing */
185 #define IGMPMSG_WRVIFWHOLE	4		/* For PIM Register and assert processing */
186 
187 #endif /* _UAPI__LINUX_MROUTE_H */
188