238 lines
9.8 KiB
C
238 lines
9.8 KiB
C
/*
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE". Use of the mrouted program represents acceptance of
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* the terms and conditions listed in that file.
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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*
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* $FreeBSD$
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* vif.h,v 3.8.4.26 1998/01/14 21:21:19 fenner Exp
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*/
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/*
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* Bitmap handling functions.
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* These should be fast but generic. bytes can be slow to zero and compare,
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* words are hard to make generic. Thus two sets of macros (yuk).
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*/
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/*
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* The VIFM_ functions should migrate out of <netinet/ip_mroute.h>, since
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* the kernel no longer uses vifbitmaps.
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*/
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#ifndef VIFM_SET
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typedef u_long vifbitmap_t;
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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_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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#endif
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/*
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* And <netinet/ip_mroute.h> was missing some required functions anyway
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*/
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#ifndef VIFM_SETALL
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#define VIFM_SETALL(m) ((m) = ~0)
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#endif
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#define VIFM_ISSET_ONLY(n, m) ((m) == (1 << (n)))
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#define VIFM_ISEMPTY(m) ((m) == 0)
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#define VIFM_CLR_MASK(m, mask) ((m) &= ~(mask))
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#define VIFM_SET_MASK(m, mask) ((m) |= (mask))
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/*
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* Neighbor bitmaps are, for efficiency, implemented as a struct
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* containing two variables of a native machine type. If you
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* have a native type that's bigger than a long, define it below.
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*/
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#define NBRTYPE u_long
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#define NBRBITS sizeof(NBRTYPE) * 8
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typedef struct {
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NBRTYPE hi;
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NBRTYPE lo;
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} nbrbitmap_t;
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#define MAXNBRS 2 * NBRBITS
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#define NO_NBR MAXNBRS
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#define NBRM_SET(n, m) (((n) < NBRBITS) ? ((m).lo |= (1 << (n))) : \
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((m).hi |= (1 << (n - NBRBITS))))
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#define NBRM_CLR(n, m) (((n) < NBRBITS) ? ((m).lo &= ~(1 << (n))) : \
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((m).hi &= ~(1 << (n - NBRBITS))))
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#define NBRM_ISSET(n, m) (((n) < NBRBITS) ? ((m).lo & (1 << (n))) : \
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((m).hi & (1 << ((n) - NBRBITS))))
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#define NBRM_CLRALL(m) ((m).lo = (m).hi = 0)
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#define NBRM_COPY(mfrom, mto) ((mto).lo = (mfrom).lo, (mto).hi = (mfrom).hi)
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#define NBRM_SAME(m1, m2) (((m1).lo == (m2).lo) && ((m1).hi == (m2).hi))
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#define NBRM_ISEMPTY(m) (((m).lo == 0) && ((m).hi == 0))
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#define NBRM_SETMASK(m, mask) (((m).lo |= (mask).lo),((m).hi |= (mask).hi))
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#define NBRM_CLRMASK(m, mask) (((m).lo &= ~(mask).lo),((m).hi &= ~(mask).hi))
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#define NBRM_MASK(m, mask) (((m).lo &= (mask).lo),((m).hi &= (mask).hi))
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#define NBRM_ISSETMASK(m, mask) (((m).lo & (mask).lo) || ((m).hi & (mask).hi))
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#define NBRM_ISSETALLMASK(m, mask)\
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((((m).lo & (mask).lo) == (mask).lo) && \
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(((m).hi & (mask).hi) == (mask).hi))
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/*
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* This macro is TRUE if all the subordinates have been pruned, or if
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* there are no subordinates on this vif.
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* The arguments is the map of subordinates, the map of neighbors on the
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* vif, and the map of received prunes.
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*/
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#define SUBS_ARE_PRUNED(sub, vifmask, prunes) \
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(((sub).lo & (vifmask).lo) == ((prunes).lo & (vifmask).lo & (sub).lo) && \
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((sub).hi & (vifmask).hi) == ((prunes).hi & (vifmask).hi & (sub).hi))
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struct blastinfo {
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char * bi_buf; /* Pointer to malloced storage */
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char * bi_cur; /* The update to process next */
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char * bi_end; /* The place to put the next update */
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int bi_len; /* Size of malloced storage */
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int bi_timer; /* Timer to run process_blaster_report */
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};
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/*
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* User level Virtual Interface structure
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*
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* A "virtual interface" is either a physical, multicast-capable interface
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* (called a "phyint") or a virtual point-to-point link (called a "tunnel").
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* (Note: all addresses, subnet numbers and masks are kept in NETWORK order.)
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*/
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struct uvif {
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u_int uv_flags; /* VIFF_ flags defined below */
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u_char uv_metric; /* cost of this vif */
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u_char uv_admetric; /* advertised cost of this vif */
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u_char uv_threshold; /* min ttl required to forward on vif */
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u_int uv_rate_limit; /* rate limit on this vif */
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u_int32 uv_lcl_addr; /* local address of this vif */
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u_int32 uv_rmt_addr; /* remote end-point addr (tunnels only) */
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u_int32 uv_dst_addr; /* destination for DVMRP messages */
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u_int32 uv_subnet; /* subnet number (phyints only) */
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u_int32 uv_subnetmask; /* subnet mask (phyints only) */
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u_int32 uv_subnetbcast;/* subnet broadcast addr (phyints only) */
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char uv_name[IFNAMSIZ]; /* interface name */
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struct listaddr *uv_groups; /* list of local groups (phyints only) */
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struct listaddr *uv_neighbors; /* list of neighboring routers */
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nbrbitmap_t uv_nbrmap; /* bitmap of active neighboring routers */
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struct listaddr *uv_querier; /* IGMP querier on vif */
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int uv_igmpv1_warn;/* To rate-limit IGMPv1 warnings */
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int uv_prune_lifetime; /* Prune lifetime or 0 for default */
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struct vif_acl *uv_acl; /* access control list of groups */
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int uv_leaf_timer; /* time until this vif is considrd leaf */
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struct phaddr *uv_addrs; /* Additional subnets on this vif */
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struct vif_filter *uv_filter; /* Route filters on this vif */
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struct blastinfo uv_blaster; /* Info about route blasters */
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int uv_nbrup; /* Counter for neighbor up events */
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int uv_icmp_warn; /* To rate-limit ICMP warnings */
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u_int uv_nroutes; /* # of routes with this vif as parent */
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struct ip *uv_encap_hdr; /* Pre-formed header to encapsulate msgs*/
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};
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#define uv_blasterbuf uv_blaster.bi_buf
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#define uv_blastercur uv_blaster.bi_cur
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#define uv_blasterend uv_blaster.bi_end
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#define uv_blasterlen uv_blaster.bi_len
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#define uv_blastertimer uv_blaster.bi_timer
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#define VIFF_KERNEL_FLAGS (VIFF_TUNNEL|VIFF_SRCRT)
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#define VIFF_DOWN 0x000100 /* kernel state of interface */
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#define VIFF_DISABLED 0x000200 /* administratively disabled */
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#define VIFF_QUERIER 0x000400 /* I am the subnet's querier */
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#define VIFF_ONEWAY 0x000800 /* Maybe one way interface */
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#define VIFF_LEAF 0x001000 /* all neighbors are leaves */
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#define VIFF_IGMPV1 0x002000 /* Act as an IGMPv1 Router */
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#define VIFF_REXMIT_PRUNES 0x004000 /* retransmit prunes */
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#define VIFF_PASSIVE 0x008000 /* passive tunnel */
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#define VIFF_ALLOW_NONPRUNERS 0x010000 /* ok to peer with nonprunrs */
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#define VIFF_NOFLOOD 0x020000 /* don't flood on this vif */
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#define VIFF_NOTRANSIT 0x040000 /* don't transit these vifs */
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#define VIFF_BLASTER 0x080000 /* nbr on vif blasts routes */
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#define VIFF_FORCE_LEAF 0x100000 /* ignore nbrs on this vif */
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#define VIFF_OTUNNEL 0x200000 /* DVMRP msgs "beside" tunnel*/
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#define AVOID_TRANSIT(v, r) \
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(((r)->rt_parent != NO_VIF) && \
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((r)->rt_gateway != 0) && \
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(uvifs[(v)].uv_flags & VIFF_NOTRANSIT) && \
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(uvifs[(r)->rt_parent].uv_flags & VIFF_NOTRANSIT))
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struct phaddr {
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struct phaddr *pa_next;
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u_int32 pa_subnet; /* extra subnet */
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u_int32 pa_subnetmask; /* netmask of extra subnet */
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u_int32 pa_subnetbcast; /* broadcast of extra subnet */
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};
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struct vif_acl {
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struct vif_acl *acl_next; /* next acl member */
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u_int32 acl_addr; /* Group address */
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u_int32 acl_mask; /* Group addr. mask */
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};
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struct vif_filter {
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int vf_type;
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#define VFT_ACCEPT 1
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#define VFT_DENY 2
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int vf_flags;
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#define VFF_BIDIR 1
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struct vf_element *vf_filter;
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};
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struct vf_element {
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struct vf_element *vfe_next;
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u_int32 vfe_addr;
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u_int32 vfe_mask;
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int vfe_flags;
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#define VFEF_EXACT 0x0001
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};
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struct listaddr {
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struct listaddr *al_next; /* link to next addr, MUST BE FIRST */
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u_int32 al_addr; /* local group or neighbor address */
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u_long al_timer; /* for timing out group or neighbor */
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time_t al_ctime; /* entry creation time */
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union {
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struct {
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u_int32 alur_genid; /* generation id for neighbor */
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u_int alur_nroutes; /* # of routes w/ nbr as parent */
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u_char alur_pv; /* router protocol version */
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u_char alur_mv; /* router mrouted version */
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u_char alur_index; /* neighbor index */
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} alu_router;
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struct {
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u_int32 alug_reporter; /* a host which reported membership */
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u_long alug_timerid; /* timer for group membership */
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u_long alug_query; /* timer for repeated leave query */
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u_char alug_old; /* time since heard old report */
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} alu_group;
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} al_alu;
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u_short al_flags; /* flags related to this neighbor */
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};
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#define al_genid al_alu.alu_router.alur_genid
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#define al_nroutes al_alu.alu_router.alur_nroutes
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#define al_pv al_alu.alu_router.alur_pv
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#define al_mv al_alu.alu_router.alur_mv
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#define al_index al_alu.alu_router.alur_index
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#define al_reporter al_alu.alu_group.alug_reporter
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#define al_old al_alu.alu_group.alug_old
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#define al_timerid al_alu.alu_group.alug_timerid
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#define al_query al_alu.alu_group.alug_query
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#define NBRF_LEAF 0x0001 /* This neighbor is a leaf */
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#define NBRF_GENID 0x0100 /* I know this neighbor's genid */
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#define NBRF_WAITING 0x0200 /* Waiting for peering to come up */
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#define NBRF_ONEWAY 0x0400 /* One-way peering */
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#define NBRF_TOOOLD 0x0800 /* Too old (policy decision) */
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#define NBRF_TOOMANYROUTES 0x1000 /* Neighbor is spouting routes */
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#define NBRF_NOTPRUNING 0x2000 /* Neighbor doesn't appear to prune */
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/*
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* Don't peer with neighbors with any of these flags set
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*/
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#define NBRF_DONTPEER (NBRF_WAITING|NBRF_ONEWAY|NBRF_TOOOLD| \
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NBRF_TOOMANYROUTES|NBRF_NOTPRUNING)
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#define NO_VIF ((vifi_t)MAXVIFS) /* An invalid vif index */
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