1 /* $NetBSD: ip_mroute.h,v 1.21 2003/06/26 03:35:00 itojun Exp $ */
2
3 /*
4 * Definitions for IP multicast forwarding.
5 *
6 * Written by David Waitzman, BBN Labs, August 1988.
7 * Modified by Steve Deering, Stanford, February 1989.
8 * Modified by Ajit Thyagarajan, PARC, August 1993.
9 * Modified by Ajit Thyagarajan, PARC, August 1994.
10 *
11 * MROUTING Revision: 1.2
12 */
13
14 #ifndef _NETINET_IP_MROUTE_H_
15 #define _NETINET_IP_MROUTE_H_
16
17 #include <sys/queue.h>
18 #include <sys/callout.h>
19
20 /*
21 * Multicast Routing set/getsockopt commands.
22 */
23 #define MRT_INIT 100 /* initialize forwarder */
24 #define MRT_DONE 101 /* shut down forwarder */
25 #define MRT_ADD_VIF 102 /* create virtual interface */
26 #define MRT_DEL_VIF 103 /* delete virtual interface */
27 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */
28 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */
29 #define MRT_VERSION 106 /* get kernel version number */
30 #define MRT_ASSERT 107 /* enable PIM assert processing */
31
32
33 /*
34 * Types and macros for handling bitmaps with one bit per virtual interface.
35 */
36 #define MAXVIFS 32
37 typedef u_int32_t vifbitmap_t;
38 typedef u_int16_t vifi_t; /* type of a vif index */
39
40 #define VIFM_SET(n, m) ((m) |= (1 << (n)))
41 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
42 #define VIFM_ISSET(n, m) ((m) & (1 << (n)))
43 #define VIFM_SETALL(m) ((m) = 0xffffffff)
44 #define VIFM_CLRALL(m) ((m) = 0x00000000)
45 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
46 #define VIFM_SAME(m1, m2) ((m1) == (m2))
47
48 #define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
49 #define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */
50
51 /*
52 * Argument structure for MRT_ADD_VIF.
53 * (MRT_DEL_VIF takes a single vifi_t argument.)
54 */
55 struct vifctl {
56 vifi_t vifc_vifi; /* the index of the vif to be added */
57 u_int8_t vifc_flags; /* VIFF_ flags defined below */
58 u_int8_t vifc_threshold; /* min ttl required to forward on vif */
59 u_int32_t vifc_rate_limit; /* max rate */
60 struct in_addr vifc_lcl_addr;/* local interface address */
61 struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */
62 };
63
64 /*
65 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC.
66 * (mfcc_tos to be added at a future point)
67 */
68 struct mfcctl {
69 struct in_addr mfcc_origin; /* ip origin of mcasts */
70 struct in_addr mfcc_mcastgrp; /* multicast group associated */
71 vifi_t mfcc_parent; /* incoming vif */
72 u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
73 };
74
75 /*
76 * Argument structure used by mrouted to get src-grp pkt counts.
77 */
78 struct sioc_sg_req {
79 struct in_addr src;
80 struct in_addr grp;
81 u_long pktcnt;
82 u_long bytecnt;
83 u_long wrong_if;
84 };
85
86 /*
87 * Argument structure used by mrouted to get vif pkt counts.
88 */
89 struct sioc_vif_req {
90 vifi_t vifi; /* vif number */
91 u_long icount; /* input packet count on vif */
92 u_long ocount; /* output packet count on vif */
93 u_long ibytes; /* input byte count on vif */
94 u_long obytes; /* output byte count on vif */
95 };
96
97
98 /*
99 * The kernel's multicast routing statistics.
100 */
101 struct mrtstat {
102 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
103 u_long mrts_mfc_misses; /* # forw. cache hash table misses */
104 u_long mrts_upcalls; /* # calls to mrouted */
105 u_long mrts_no_route; /* no route for packet's origin */
106 u_long mrts_bad_tunnel; /* malformed tunnel options */
107 u_long mrts_cant_tunnel; /* no room for tunnel options */
108 u_long mrts_wrong_if; /* arrived on wrong interface */
109 u_long mrts_upq_ovflw; /* upcall Q overflow */
110 u_long mrts_cache_cleanups; /* # entries with no upcalls */
111 u_long mrts_drop_sel; /* pkts dropped selectively */
112 u_long mrts_q_overflow; /* pkts dropped - Q overflow */
113 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
114 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
115 };
116
117
118 #ifdef _KERNEL
119
120 /*
121 * The kernel's virtual-interface structure.
122 */
123 struct encaptab;
124 struct vif {
125 struct mbuf *tbf_q, **tbf_t; /* packet queue */
126 struct timeval tbf_last_pkt_t; /* arr. time of last pkt */
127 u_int32_t tbf_n_tok; /* no of tokens in bucket */
128 u_int32_t tbf_q_len; /* length of queue at this vif */
129 u_int32_t tbf_max_q_len; /* max. queue length */
130
131 u_int8_t v_flags; /* VIFF_ flags defined above */
132 u_int8_t v_threshold; /* min ttl required to forward on vif */
133 u_int32_t v_rate_limit; /* max rate */
134 struct in_addr v_lcl_addr; /* local interface address */
135 struct in_addr v_rmt_addr; /* remote address (tunnels only) */
136 struct ifnet *v_ifp; /* pointer to interface */
137 u_long v_pkt_in; /* # pkts in on interface */
138 u_long v_pkt_out; /* # pkts out on interface */
139 u_long v_bytes_in; /* # bytes in on interface */
140 u_long v_bytes_out; /* # bytes out on interface */
141 struct route v_route; /* cached route if this is a tunnel */
142 struct callout v_repq_ch; /* for tbf_reprocess_q() */
143 #ifdef RSVP_ISI
144 int v_rsvp_on; /* # RSVP listening on this vif */
145 struct socket *v_rsvpd; /* # RSVPD daemon */
146 #endif /* RSVP_ISI */
147 const struct encaptab *v_encap_cookie;
148 };
149
150 /*
151 * The kernel's multicast forwarding cache entry structure.
152 * (A field for the type of service (mfc_tos) is to be added
153 * at a future point.)
154 */
155 struct mfc {
156 LIST_ENTRY(mfc) mfc_hash;
157 struct in_addr mfc_origin; /* ip origin of mcasts */
158 struct in_addr mfc_mcastgrp; /* multicast group associated */
159 vifi_t mfc_parent; /* incoming vif */
160 u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
161 u_long mfc_pkt_cnt; /* pkt count for src-grp */
162 u_long mfc_byte_cnt; /* byte count for src-grp */
163 u_long mfc_wrong_if; /* wrong if for src-grp */
164 int mfc_expire; /* time to clean entry up */
165 struct timeval mfc_last_assert; /* last time I sent an assert */
166 struct rtdetq *mfc_stall; /* pkts waiting for route */
167 };
168
169 /*
170 * Structure used to communicate from kernel to multicast router.
171 * (Note the convenient similarity to an IP packet.)
172 */
173 struct igmpmsg {
174 u_int32_t unused1;
175 u_int32_t unused2;
176 u_int8_t im_msgtype; /* what type of message */
177 #define IGMPMSG_NOCACHE 1
178 #define IGMPMSG_WRONGVIF 2
179 u_int8_t im_mbz; /* must be zero */
180 u_int8_t im_vif; /* vif rec'd on */
181 u_int8_t unused3;
182 struct in_addr im_src, im_dst;
183 } __attribute__((__packed__));
184
185 /*
186 * Argument structure used for pkt info. while upcall is made.
187 */
188 struct rtdetq {
189 struct mbuf *m; /* a copy of the packet */
190 struct ifnet *ifp; /* interface pkt came in on */
191 #ifdef UPCALL_TIMING
192 struct timeval t; /* timestamp */
193 #endif /* UPCALL_TIMING */
194 struct rtdetq *next;
195 };
196
197 #define MFCTBLSIZ 256
198 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */
199
200 /*
201 * Token bucket filter code
202 */
203 #define MAX_BKT_SIZE 10000 /* 10K bytes size */
204 #define MAXQSIZE 10 /* max. no of pkts in token queue */
205
206
207 int ip_mrouter_set __P((struct socket *, int, struct mbuf **));
208 int ip_mrouter_get __P((struct socket *, int, struct mbuf **));
209 int mrt_ioctl __P((struct socket *, u_long, caddr_t));
210 int ip_mrouter_done __P((void));
211 void ip_mrouter_detach(struct ifnet *);
212 void reset_vif __P((struct vif *));
213 #ifdef RSVP_ISI
214 int ip_mforward __P((struct mbuf *, struct ifnet *, struct ip_moptions *));
215 int legal_vif_num __P((int));
216 int ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
217 int ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
218 void ip_rsvp_force_done __P((struct socket *));
219 /*int rsvp_input __P((struct mbuf *, struct ifnet *));*/
220 void rsvp_input __P((struct mbuf *, int, int));
221 #else
222 int ip_mforward __P((struct mbuf *, struct ifnet *));
223 #endif
224
225 #endif /* _KERNEL */
226
227 #endif /* _NETINET_IP_MROUTE_H_ */
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