1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* $OpenBSD: ip_mroute.h,v 1.4 1999/08/08 00:43:00 niklas Exp $ */
/* $NetBSD: ip_mroute.h,v 1.10 1996/02/13 23:42:55 christos Exp $ */
/*
* Definitions for IP multicast forwarding.
*
* Written by David Waitzman, BBN Labs, August 1988.
* Modified by Steve Deering, Stanford, February 1989.
* Modified by Ajit Thyagarajan, PARC, August 1993.
* Modified by Ajit Thyagarajan, PARC, August 1994.
*
* MROUTING Revision: 1.2
*/
#include <sys/queue.h>
/*
* Multicast Routing set/getsockopt commands.
*/
#define MRT_INIT 100 /* initialize forwarder */
#define MRT_DONE 101 /* shut down forwarder */
#define MRT_ADD_VIF 102 /* create virtual interface */
#define MRT_DEL_VIF 103 /* delete virtual interface */
#define MRT_ADD_MFC 104 /* insert forwarding cache entry */
#define MRT_DEL_MFC 105 /* delete forwarding cache entry */
#define MRT_VERSION 106 /* get kernel version number */
#define MRT_ASSERT 107 /* enable PIM assert processing */
/*
* Types and macros for handling bitmaps with one bit per virtual interface.
*/
#define MAXVIFS 32
typedef u_int32_t vifbitmap_t;
typedef u_int16_t vifi_t; /* type of a vif index */
#define VIFM_SET(n, m) ((m) |= (1 << (n)))
#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
#define VIFM_SETALL(m) ((m) = 0xffffffff)
#define VIFM_CLRALL(m) ((m) = 0x00000000)
#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
#define VIFM_SAME(m1, m2) ((m1) == (m2))
#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */
/*
* Argument structure for MRT_ADD_VIF.
* (MRT_DEL_VIF takes a single vifi_t argument.)
*/
struct vifctl {
vifi_t vifc_vifi; /* the index of the vif to be added */
u_int8_t vifc_flags; /* VIFF_ flags defined below */
u_int8_t vifc_threshold; /* min ttl required to forward on vif */
u_int32_t vifc_rate_limit; /* max rate */
struct in_addr vifc_lcl_addr;/* local interface address */
struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */
};
/*
* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC.
* (mfcc_tos to be added at a future point)
*/
struct mfcctl {
struct in_addr mfcc_origin; /* ip origin of mcasts */
struct in_addr mfcc_mcastgrp; /* multicast group associated */
vifi_t mfcc_parent; /* incoming vif */
u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
};
/*
* Argument structure used by mrouted to get src-grp pkt counts.
*/
struct sioc_sg_req {
struct in_addr src;
struct in_addr grp;
u_long pktcnt;
u_long bytecnt;
u_long wrong_if;
};
/*
* Argument structure used by mrouted to get vif pkt counts.
*/
struct sioc_vif_req {
vifi_t vifi; /* vif number */
u_long icount; /* input packet count on vif */
u_long ocount; /* output packet count on vif */
u_long ibytes; /* input byte count on vif */
u_long obytes; /* output byte count on vif */
};
/*
* The kernel's multicast routing statistics.
*/
struct mrtstat {
u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
u_long mrts_mfc_misses; /* # forw. cache hash table misses */
u_long mrts_upcalls; /* # calls to mrouted */
u_long mrts_no_route; /* no route for packet's origin */
u_long mrts_bad_tunnel; /* malformed tunnel options */
u_long mrts_cant_tunnel; /* no room for tunnel options */
u_long mrts_wrong_if; /* arrived on wrong interface */
u_long mrts_upq_ovflw; /* upcall Q overflow */
u_long mrts_cache_cleanups; /* # entries with no upcalls */
u_long mrts_drop_sel; /* pkts dropped selectively */
u_long mrts_q_overflow; /* pkts dropped - Q overflow */
u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
};
#ifdef _KERNEL
/*
* Token bucket filter at each vif
*/
struct tbf {
u_int32_t last_pkt_t; /* arr. time of last pkt */
u_int32_t n_tok; /* no of tokens in bucket */
u_int32_t q_len; /* length of queue at this vif */
};
/*
* The kernel's virtual-interface structure.
*/
struct vif {
u_int8_t v_flags; /* VIFF_ flags defined above */
u_int8_t v_threshold; /* min ttl required to forward on vif */
u_int32_t v_rate_limit; /* max rate */
struct tbf v_tbf; /* token bucket structure at intf. */
struct in_addr v_lcl_addr; /* local interface address */
struct in_addr v_rmt_addr; /* remote address (tunnels only) */
struct ifnet *v_ifp; /* pointer to interface */
u_long v_pkt_in; /* # pkts in on interface */
u_long v_pkt_out; /* # pkts out on interface */
u_long v_bytes_in; /* # bytes in on interface */
u_long v_bytes_out; /* # bytes out on interface */
struct route v_route; /* cached route if this is a tunnel */
#ifdef RSVP_ISI
int v_rsvp_on; /* # RSVP listening on this vif */
struct socket *v_rsvpd; /* # RSVPD daemon */
#endif /* RSVP_ISI */
};
/*
* The kernel's multicast forwarding cache entry structure.
* (A field for the type of service (mfc_tos) is to be added
* at a future point.)
*/
struct mfc {
LIST_ENTRY(mfc) mfc_hash;
struct in_addr mfc_origin; /* ip origin of mcasts */
struct in_addr mfc_mcastgrp; /* multicast group associated */
vifi_t mfc_parent; /* incoming vif */
u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
u_long mfc_pkt_cnt; /* pkt count for src-grp */
u_long mfc_byte_cnt; /* byte count for src-grp */
u_long mfc_wrong_if; /* wrong if for src-grp */
int mfc_expire; /* time to clean entry up */
struct timeval mfc_last_assert; /* last time I sent an assert */
struct rtdetq *mfc_stall; /* pkts waiting for route */
};
/*
* Structure used to communicate from kernel to multicast router.
* (Note the convenient similarity to an IP packet.)
*/
struct igmpmsg {
u_int32_t unused1;
u_int32_t unused2;
u_int8_t im_msgtype; /* what type of message */
#define IGMPMSG_NOCACHE 1
#define IGMPMSG_WRONGVIF 2
u_int8_t im_mbz; /* must be zero */
u_int8_t im_vif; /* vif rec'd on */
u_int8_t unused3;
struct in_addr im_src, im_dst;
};
/*
* Argument structure used for pkt info. while upcall is made.
*/
struct rtdetq {
struct mbuf *m; /* a copy of the packet */
struct ifnet *ifp; /* interface pkt came in on */
#ifdef UPCALL_TIMING
struct timeval t; /* timestamp */
#endif /* UPCALL_TIMING */
struct rtdetq *next;
};
#define MFCTBLSIZ 256
#define MAX_UPQ 4 /* max. no of pkts in upcall Q */
/*
* Token bucket filter code
*/
#define MAX_BKT_SIZE 10000 /* 10K bytes size */
#define MAXQSIZE 10 /* max. no of pkts in token queue */
/*
* Queue structure at each vif
*/
struct pkt_queue {
u_int32_t pkt_len; /* length of packet in queue */
struct mbuf *pkt_m; /* pointer to packet mbuf */
struct ip *pkt_ip; /* pointer to ip header */
};
int ip_mrouter_set __P((int, struct socket *, struct mbuf **));
int ip_mrouter_get __P((int, struct socket *, struct mbuf **));
int mrt_ioctl __P((u_long, caddr_t));
int ip_mrouter_done __P((void));
void reset_vif __P((struct vif *));
void vif_delete __P((struct ifnet *));
#ifdef RSVP_ISI
int ip_mforward __P((struct mbuf *, struct ifnet *, struct ip_moptions *));
int legal_vif_num __P((int));
int ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
int ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
void ip_rsvp_force_done __P((struct socket *));
void rsvp_input __P((struct mbuf *, struct ifnet *));
#else
int ip_mforward __P((struct mbuf *, struct ifnet *));
#endif
void ipip_input __P((struct mbuf *, ...));
#endif /* _KERNEL */
|
