/* * Copyright (c) 1998-2001 * University of Southern California/Information Sciences Institute. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Part of this program has been derived from mrouted. * The mrouted program is covered by the license in the accompanying file * named "LICENSE.mrouted". * * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of * Leland Stanford Junior University. * */ /* * Bitmap handling functions. * These should be fast but generic. bytes can be slow to zero and compare, * words are hard to make generic. Thus two sets of macros (yuk). */ /* * The VIFM_ functions should migrate out of , since * the kernel no longer uses vifbitmaps. */ #ifndef VIFM_SET typedef uint32_t vifbitmap_t; #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_CLRALL(m) ((m) = 0x00000000) #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) #define VIFM_SAME(m1, m2) ((m1) == (m2)) #endif /* * And was missing some required functions anyway */ #if !defined(VIFM_SETALL) #define VIFM_SETALL(m) ((m) = ~0) #endif #define VIFM_ISSET_ONLY(n, m) ((m) == (1 << (n))) #define VIFM_ISEMPTY(m) ((m) == 0) #define VIFM_CLR_MASK(m, mask) ((m) &= ~(mask)) #define VIFM_SET_MASK(m, mask) ((m) |= (mask)) #define VIFM_MERGE(m1, m2, result) ((result) = (m1) | (m2)) /* Check whether I am the last hop on some LAN */ #define VIFM_LASTHOP_ROUTER(leaves, oifs) ((leaves) & (oifs)) /* * Neighbor bitmaps are, for efficiency, implemented as a struct * containing two variables of a native machine type. If you * have a native type that's bigger than a long, define it below. */ #define NBRTYPE uint32_t #define NBRBITS sizeof(NBRTYPE) * 8 typedef struct { NBRTYPE hi; NBRTYPE lo; } nbrbitmap_t; #define MAXNBRS 2 * NBRBITS #define NBRM_SET(n, m) (((n) < NBRBITS) ? ((m).lo |= (1 << (n))) : \ ((m).hi |= (1 << (n - NBRBITS)))) #define NBRM_CLR(n, m) (((n) < NBRBITS) ? ((m).lo &= ~(1 << (n))) : \ ((m).hi &= ~(1 << (n - NBRBITS)))) #define NBRM_ISSET(n, m) (((n) < NBRBITS) ? ((m).lo & (1 << (n))) : \ ((m).hi & (1 << ((n) - NBRBITS)))) #define NBRM_CLRALL(m) ((m).lo = (m).hi = 0) #define NBRM_COPY(mfrom, mto) ((mto).lo = (mfrom).lo, (mto).hi = (mfrom).hi) #define NBRM_SAME(m1, m2) (((m1).lo == (m2).lo) && ((m1).hi == (m2).hi)) #define NBRM_ISEMPTY(m) (((m).lo == 0) && ((m).hi == 0)) #define NBRM_SETMASK(m, mask) (((m).lo |= (mask).lo),((m).hi |= (mask).hi)) #define NBRM_CLRMASK(m, mask) (((m).lo &= ~(mask).lo),((m).hi &= ~(mask).hi)) #define NBRM_MASK(m, mask) (((m).lo &= (mask).lo),((m).hi &= (mask).hi)) #define NBRM_ISSETMASK(m, mask) (((m).lo & (mask).lo) || ((m).hi & (mask).hi)) #define NBRM_ISSETALLMASK(m, mask)\ ((((m).lo & (mask).lo) == (mask).lo) && \ (((m).hi & (mask).hi) == (mask).hi)) /* * This macro is TRUE if all the subordinates have been pruned, or if * there are no subordinates on this vif. * The arguments is the map of subordinates, the map of neighbors on the * vif, and the map of received prunes. */ #define SUBS_ARE_PRUNED(sub, vifmask, prunes) \ (((sub).lo & (vifmask).lo) == ((prunes).lo & (vifmask).lo & (sub).lo) && \ ((sub).hi & (vifmask).hi) == ((prunes).hi & (vifmask).hi & (sub).hi)) /* * User level Virtual Interface structure * * A "virtual interface" is either a physical, multicast-capable interface * (called a "phyint"), a virtual point-to-point link (called a "tunnel") * or a "register vif" used by PIM. The register vif is used by the * Designated Router (DR) to send encapsulated data packets to the * Rendevous Point (RP) for a particular group. The data packets are * encapsulated in PIM messages (IPPROTO_PIM = 103) and then unicast to * the RP. * (Note: all addresses, subnet numbers and masks are kept in NETWORK order.) */ struct uvif { u_int uv_flags; /* VIFF_ flags defined below */ uint8_t uv_metric; /* cost of this vif */ uint8_t uv_admetric; /* advertised cost of this vif */ uint8_t uv_threshold; /* min ttl required to forward on vif */ u_int uv_rate_limit; /* rate limit on this vif */ int uv_mtu; /* Initially interface MTU, then PMTU */ uint32_t uv_lcl_addr; /* local address of this vif */ uint32_t uv_rmt_addr; /* remote end-point addr (tunnels only) */ uint32_t uv_dst_addr; /* destination for DVMRP/PIM messages */ uint32_t uv_subnet; /* subnet number (phyints only) */ uint32_t uv_subnetmask; /* subnet mask (phyints only) */ uint32_t uv_subnetbcast;/* subnet broadcast addr (phyints only) */ char uv_name[IFNAMSIZ]; /* interface name */ struct listaddr *uv_groups; /* list of local groups (phyints only) */ struct listaddr *uv_dvmrp_neighbors; /* list of neighboring routers */ nbrbitmap_t uv_nbrmap; /* bitmap of active neighboring routers */ struct listaddr *uv_querier; /* IGMP querier on vif */ int uv_igmpv1_warn;/* To rate-limit IGMPv1 warnings */ int uv_prune_lifetime; /* Prune lifetime or 0 for default */ struct vif_acl *uv_acl; /* access control list of groups */ int uv_leaf_timer; /* time until this vif is considrd leaf */ struct phaddr *uv_addrs; /* Additional subnets on this vif */ struct vif_filter *uv_filter; /* Route filters on this vif */ uint16_t uv_hello_timer; /* Timer for sending PIM hello msgs */ uint32_t uv_dr_prio; /* PIM Hello DR Priority */ uint32_t uv_genid; /* Random PIM Hello Generation ID */ uint16_t uv_gq_timer; /* Group Query timer */ uint16_t uv_jp_timer; /* The Join/Prune timer */ int uv_local_pref; /* default local preference for assert */ int uv_local_metric;/* default local metric for assert */ struct pim_nbr_entry *uv_pim_neighbors; /* list of PIM neighbor routers */ #ifdef __linux__ int uv_ifindex; /* because RTNETLINK returns only index */ #endif /* __linux__ */ }; /* TODO: define VIFF_KERNEL_FLAGS */ #define VIFF_KERNEL_FLAGS (VIFF_TUNNEL | VIFF_SRCRT) #define VIFF_DOWN 0x000100 /* kernel state of interface */ #define VIFF_DISABLED 0x000200 /* administratively disabled */ #define VIFF_QUERIER 0x000400 /* I am the subnet's querier */ #define VIFF_ONEWAY 0x000800 /* Maybe one way interface */ #define VIFF_LEAF 0x001000 /* all neighbors are leaves */ #define VIFF_IGMPV1 0x002000 /* Act as an IGMPv1 Router */ #define VIFF_REXMIT_PRUNES 0x004000 /* retransmit prunes */ #define VIFF_PASSIVE 0x008000 /* passive tunnel */ #define VIFF_ALLOW_NONPRUNERS 0x010000 /* ok to peer with nonprunrs */ #define VIFF_NOFLOOD 0x020000 /* don't flood on this vif */ #define VIFF_DR 0x040000 /* designated router */ /* TODO: VIFF_NONBRS == VIFF_ONEWAY? */ #define VIFF_NONBRS 0x080000 /* no neighbor on vif */ #define VIFF_POINT_TO_POINT 0x100000 /* point-to-point link */ #define VIFF_PIM_NBR 0x200000 /* PIM neighbor */ #define VIFF_DVMRP_NBR 0x400000 /* DVMRP neighbor */ #define VIFF_IGMPV2 0x800000 /* Act as an IGMPv2 Router */ struct phaddr { struct phaddr *pa_next; uint32_t pa_subnet; /* extra subnet */ uint32_t pa_subnetmask; /* netmask of extra subnet */ uint32_t pa_subnetbcast; /* broadcast of extra subnet */ }; /* The Access Control List (list with scoped addresses) member */ struct vif_acl { struct vif_acl *acl_next; /* next acl member */ uint32_t acl_addr; /* Group address */ uint32_t acl_mask; /* Group addr. mask */ }; struct vif_filter { int vf_type; #define VFT_ACCEPT 1 #define VFT_DENY 2 int vf_flags; #define VFF_BIDIR 1 struct vf_element *vf_filter; }; struct vf_element { struct vf_element *vfe_next; uint32_t vfe_addr; uint32_t vfe_mask; int vfe_flags; #define VFEF_EXACT 0x0001 }; struct listaddr { struct listaddr *al_next; /* link to next addr, MUST BE FIRST */ uint32_t al_addr; /* local group or neighbor address */ struct listaddr *al_sources; /* link to sources */ uint32_t al_timer; /* for timing out group or neighbor */ time_t al_ctime; /* entry creation time */ union { uint32_t alu_genid; /* generation id for neighbor */ uint32_t alu_reporter; /* a host which reported membership */ } al_alu; uint8_t al_pv; /* router protocol version */ uint8_t al_mv; /* router mrouted version */ uint8_t al_old; /* time since heard old report */ uint8_t al_index; /* neighbor index */ uint32_t al_timerid; /* timer for group membership */ uint32_t al_query; /* timer for repeated leave query */ uint16_t al_flags; /* flags related to this neighbor */ u_long al_versiontimer; /* timer for version switch */ }; #define al_genid al_alu.alu_genid #define al_reporter al_alu.alu_reporter #define NBRF_LEAF 0x0001 /* This neighbor is a leaf */ #define NBRF_GENID 0x0100 /* I know this neighbor's genid */ #define NBRF_WAITING 0x0200 /* Waiting for peering to come up */ #define NBRF_ONEWAY 0x0400 /* One-way peering */ #define NBRF_TOOOLD 0x0800 /* Too old (policy decision) */ #define NBRF_TOOMANYROUTES 0x1000 /* Neighbor is spouting routes */ #define NBRF_NOTPRUNING 0x2000 /* Neighbor doesn't appear to prune */ /* * Don't peer with neighbors with any of these flags set */ #define NBRF_DONTPEER (NBRF_WAITING|NBRF_ONEWAY|NBRF_TOOOLD| \ NBRF_TOOMANYROUTES|NBRF_NOTPRUNING) #define NO_VIF ((vifi_t)MAXVIFS) /* An invalid vif index */ /* * Used to get the RPF neighbor and IIF info * for a given source from the unicast routing table. */ struct rpfctl { struct in_addr source; /* the source for which we want iif and rpfnbr */ struct in_addr rpfneighbor;/* next hop towards the source */ vifi_t iif; /* the incoming interface to reach the next hop */ }; /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "ellemtel" * c-basic-offset: 4 * End: */