231 lines
7.3 KiB
C
231 lines
7.3 KiB
C
/* $NetBSD: ip_mroute.h,v 1.11 1996/06/23 12:12:48 mycroft Exp $ */
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/*
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* Definitions for IP multicast forwarding.
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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* Modified by Ajit Thyagarajan, PARC, August 1993.
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* Modified by Ajit Thyagarajan, PARC, August 1994.
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*
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* MROUTING Revision: 1.2
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*/
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#include <sys/queue.h>
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/*
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* Multicast Routing set/getsockopt commands.
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*/
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#define MRT_INIT 100 /* initialize forwarder */
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#define MRT_DONE 101 /* shut down forwarder */
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#define MRT_ADD_VIF 102 /* create virtual interface */
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#define MRT_DEL_VIF 103 /* delete virtual interface */
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#define MRT_ADD_MFC 104 /* insert forwarding cache entry */
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#define MRT_DEL_MFC 105 /* delete forwarding cache entry */
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#define MRT_VERSION 106 /* get kernel version number */
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#define MRT_ASSERT 107 /* enable PIM assert processing */
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/*
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* Types and macros for handling bitmaps with one bit per virtual interface.
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*/
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#define MAXVIFS 32
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typedef u_int32_t vifbitmap_t;
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typedef u_int16_t vifi_t; /* type of a vif index */
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#define VIFM_SET(n, m) ((m) |= (1 << (n)))
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#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
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#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
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#define VIFM_SETALL(m) ((m) = 0xffffffff)
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#define VIFM_CLRALL(m) ((m) = 0x00000000)
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#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
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#define VIFM_SAME(m1, m2) ((m1) == (m2))
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#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
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#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */
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/*
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* Argument structure for MRT_ADD_VIF.
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* (MRT_DEL_VIF takes a single vifi_t argument.)
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*/
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struct vifctl {
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vifi_t vifc_vifi; /* the index of the vif to be added */
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u_int8_t vifc_flags; /* VIFF_ flags defined below */
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u_int8_t vifc_threshold; /* min ttl required to forward on vif */
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u_int32_t vifc_rate_limit; /* max rate */
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struct in_addr vifc_lcl_addr;/* local interface address */
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struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */
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};
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/*
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* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC.
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* (mfcc_tos to be added at a future point)
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*/
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struct mfcctl {
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struct in_addr mfcc_origin; /* ip origin of mcasts */
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struct in_addr mfcc_mcastgrp; /* multicast group associated */
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vifi_t mfcc_parent; /* incoming vif */
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u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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};
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/*
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* Argument structure used by mrouted to get src-grp pkt counts.
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*/
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struct sioc_sg_req {
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struct in_addr src;
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struct in_addr grp;
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u_long pktcnt;
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u_long bytecnt;
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u_long wrong_if;
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};
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/*
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* Argument structure used by mrouted to get vif pkt counts.
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*/
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struct sioc_vif_req {
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vifi_t vifi; /* vif number */
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u_long icount; /* input packet count on vif */
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u_long ocount; /* output packet count on vif */
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u_long ibytes; /* input byte count on vif */
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u_long obytes; /* output byte count on vif */
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};
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/*
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* The kernel's multicast routing statistics.
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*/
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struct mrtstat {
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u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
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u_long mrts_mfc_misses; /* # forw. cache hash table misses */
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u_long mrts_upcalls; /* # calls to mrouted */
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u_long mrts_no_route; /* no route for packet's origin */
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u_long mrts_bad_tunnel; /* malformed tunnel options */
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u_long mrts_cant_tunnel; /* no room for tunnel options */
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u_long mrts_wrong_if; /* arrived on wrong interface */
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u_long mrts_upq_ovflw; /* upcall Q overflow */
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u_long mrts_cache_cleanups; /* # entries with no upcalls */
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u_long mrts_drop_sel; /* pkts dropped selectively */
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u_long mrts_q_overflow; /* pkts dropped - Q overflow */
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u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
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u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
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};
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#ifdef _KERNEL
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/*
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* Token bucket filter at each vif
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*/
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struct tbf {
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u_int32_t last_pkt_t; /* arr. time of last pkt */
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u_int32_t n_tok; /* no of tokens in bucket */
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u_int32_t q_len; /* length of queue at this vif */
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};
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/*
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* The kernel's virtual-interface structure.
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*/
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struct vif {
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u_int8_t v_flags; /* VIFF_ flags defined above */
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u_int8_t v_threshold; /* min ttl required to forward on vif */
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u_int32_t v_rate_limit; /* max rate */
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struct tbf v_tbf; /* token bucket structure at intf. */
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struct in_addr v_lcl_addr; /* local interface address */
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struct in_addr v_rmt_addr; /* remote address (tunnels only) */
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struct ifnet *v_ifp; /* pointer to interface */
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u_long v_pkt_in; /* # pkts in on interface */
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u_long v_pkt_out; /* # pkts out on interface */
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u_long v_bytes_in; /* # bytes in on interface */
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u_long v_bytes_out; /* # bytes out on interface */
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struct route v_route; /* cached route if this is a tunnel */
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#ifdef RSVP_ISI
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int v_rsvp_on; /* # RSVP listening on this vif */
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struct socket *v_rsvpd; /* # RSVPD daemon */
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#endif /* RSVP_ISI */
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};
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/*
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* The kernel's multicast forwarding cache entry structure.
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* (A field for the type of service (mfc_tos) is to be added
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* at a future point.)
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*/
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struct mfc {
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LIST_ENTRY(mfc) mfc_hash;
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struct in_addr mfc_origin; /* ip origin of mcasts */
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struct in_addr mfc_mcastgrp; /* multicast group associated */
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vifi_t mfc_parent; /* incoming vif */
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u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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u_long mfc_pkt_cnt; /* pkt count for src-grp */
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u_long mfc_byte_cnt; /* byte count for src-grp */
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u_long mfc_wrong_if; /* wrong if for src-grp */
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int mfc_expire; /* time to clean entry up */
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struct timeval mfc_last_assert; /* last time I sent an assert */
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struct rtdetq *mfc_stall; /* pkts waiting for route */
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};
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/*
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* Structure used to communicate from kernel to multicast router.
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* (Note the convenient similarity to an IP packet.)
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*/
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struct igmpmsg {
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u_int32_t unused1;
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u_int32_t unused2;
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u_int8_t im_msgtype; /* what type of message */
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#define IGMPMSG_NOCACHE 1
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#define IGMPMSG_WRONGVIF 2
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u_int8_t im_mbz; /* must be zero */
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u_int8_t im_vif; /* vif rec'd on */
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u_int8_t unused3;
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struct in_addr im_src, im_dst;
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};
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/*
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* Argument structure used for pkt info. while upcall is made.
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*/
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struct rtdetq {
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struct mbuf *m; /* a copy of the packet */
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struct ifnet *ifp; /* interface pkt came in on */
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#ifdef UPCALL_TIMING
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struct timeval t; /* timestamp */
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#endif /* UPCALL_TIMING */
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struct rtdetq *next;
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};
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#define MFCTBLSIZ 256
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#define MAX_UPQ 4 /* max. no of pkts in upcall Q */
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/*
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* Token bucket filter code
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*/
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#define MAX_BKT_SIZE 10000 /* 10K bytes size */
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#define MAXQSIZE 10 /* max. no of pkts in token queue */
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/*
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* Queue structure at each vif
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*/
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struct pkt_queue {
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u_int32_t pkt_len; /* length of packet in queue */
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struct mbuf *pkt_m; /* pointer to packet mbuf */
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struct ip *pkt_ip; /* pointer to ip header */
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};
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int ip_mrouter_set __P((struct socket *, int, struct mbuf **));
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int ip_mrouter_get __P((struct socket *, int, struct mbuf **));
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int mrt_ioctl __P((struct socket *, u_long, caddr_t));
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int ip_mrouter_done __P((void));
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void reset_vif __P((struct vif *));
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#ifdef RSVP_ISI
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int ip_mforward __P((struct mbuf *, struct ifnet *, struct ip_moptions *));
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int legal_vif_num __P((int));
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int ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
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int ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
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void ip_rsvp_force_done __P((struct socket *));
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void rsvp_input __P((struct mbuf *, struct ifnet *));
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#else
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int ip_mforward __P((struct mbuf *, struct ifnet *));
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#endif
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void ipip_input __P((struct mbuf *, ...));
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#endif /* _KERNEL */
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