144 lines
4.5 KiB
C
144 lines
4.5 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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* $Id$
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*/
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/*
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* Group table
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*
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* Each group entry is a member of two doubly-linked lists:
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*
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* a) A list hanging off of the routing table entry for this source (rt_groups)
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* sorted by group address under the routing entry (gt_next, gt_prev)
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* b) An independent list pointed to by kernel_table, which is a list of
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* active source,group's (gt_gnext, gt_gprev).
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*
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*/
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struct gtable {
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struct gtable *gt_next; /* pointer to the next entry */
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struct gtable *gt_prev; /* back pointer for linked list */
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struct gtable *gt_gnext; /* fwd pointer for group list */
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struct gtable *gt_gprev; /* rev pointer for group list */
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u_int32 gt_mcastgrp; /* multicast group associated */
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vifbitmap_t gt_scope; /* scoped interfaces */
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u_char gt_ttls[MAXVIFS]; /* ttl vector for forwarding */
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vifbitmap_t gt_grpmems; /* forw. vifs for src, grp */
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int gt_prsent_timer; /* prune timer for this group */
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int gt_timer; /* timer for this group entry */
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time_t gt_ctime; /* time of entry creation */
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u_char gt_grftsnt; /* graft sent/retransmit timer */
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struct stable *gt_srctbl; /* source table */
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struct ptable *gt_pruntbl; /* prune table */
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struct rtentry *gt_route; /* parent route */
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#ifdef RSRR
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struct rsrr_cache *gt_rsrr_cache; /* RSRR cache */
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#endif /* RSRR */
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};
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/*
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* Source table
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*
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* When source-based prunes exist, there will be a struct ptable here as well.
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*/
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struct stable
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{
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struct stable *st_next; /* pointer to the next entry */
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u_int32 st_origin; /* host origin of multicasts */
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u_long st_pktcnt; /* packet count for src-grp entry */
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};
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/*
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* structure to store incoming prunes. Can hang off of either group or source.
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*/
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struct ptable
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{
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struct ptable *pt_next; /* pointer to the next entry */
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u_int32 pt_router; /* router that sent this prune */
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vifi_t pt_vifi; /* vif prune received on */
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int pt_timer; /* timer for prune */
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};
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/*
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* The packet format for a traceroute request.
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*/
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struct tr_query {
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u_int32 tr_src; /* traceroute source */
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u_int32 tr_dst; /* traceroute destination */
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u_int32 tr_raddr; /* traceroute response address */
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#if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
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struct {
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u_int qid : 24; /* traceroute query id */
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u_int ttl : 8; /* traceroute response ttl */
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} q;
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#else
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struct {
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u_int ttl : 8; /* traceroute response ttl */
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u_int qid : 24; /* traceroute query id */
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} q;
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#endif /* BYTE_ORDER */
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};
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#define tr_rttl q.ttl
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#define tr_qid q.qid
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/*
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* Traceroute response format. A traceroute response has a tr_query at the
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* beginning, followed by one tr_resp for each hop taken.
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*/
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struct tr_resp {
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u_int32 tr_qarr; /* query arrival time */
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u_int32 tr_inaddr; /* incoming interface address */
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u_int32 tr_outaddr; /* outgoing interface address */
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u_int32 tr_rmtaddr; /* parent address in source tree */
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u_int32 tr_vifin; /* input packet count on interface */
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u_int32 tr_vifout; /* output packet count on interface */
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u_int32 tr_pktcnt; /* total incoming packets for src-grp */
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u_char tr_rproto; /* routing protocol deployed on router */
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u_char tr_fttl; /* ttl required to forward on outvif */
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u_char tr_smask; /* subnet mask for src addr */
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u_char tr_rflags; /* forwarding error codes */
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};
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/* defs within mtrace */
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#define QUERY 1
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#define RESP 2
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#define QLEN sizeof(struct tr_query)
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#define RLEN sizeof(struct tr_resp)
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/* fields for tr_rflags (forwarding error codes) */
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#define TR_NO_ERR 0
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#define TR_WRONG_IF 1
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#define TR_PRUNED 2
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#define TR_OPRUNED 3
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#define TR_SCOPED 4
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#define TR_NO_RTE 5
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#define TR_NO_FWD 7
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#define TR_NO_SPACE 0x81
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#define TR_OLD_ROUTER 0x82
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/* fields for tr_rproto (routing protocol) */
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#define PROTO_DVMRP 1
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#define PROTO_MOSPF 2
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#define PROTO_PIM 3
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#define PROTO_CBT 4
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#define MASK_TO_VAL(x, i) { \
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u_int32 _x = ntohl(x); \
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(i) = 1; \
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while ((_x) <<= 1) \
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(i)++; \
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};
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#define VAL_TO_MASK(x, i) { \
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x = htonl(~((1 << (32 - (i))) - 1)); \
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};
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#define NBR_VERS(n) (((n)->al_pv << 8) + (n)->al_mv)
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