29a6d69cc3
conflict markers, but it actually changes nothing. We've been running this code with small changes for some time, this may be useful for checking what those changes. It was unfortunate this module got so far away from the vendor branch (whitespace changes didn't help)
139 lines
5.1 KiB
C
139 lines
5.1 KiB
C
/*
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* Copyright (c) 1993 by the University of Southern California
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation in source and binary forms for non-commercial purposes
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* and without fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both the copyright notice and
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* this permission notice appear in supporting documentation. and that
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* any documentation, advertising materials, and other materials related
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* to such distribution and use acknowledge that the software was
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* developed by the University of Southern California, Information
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* Sciences Institute. The name of the University may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THE UNIVERSITY OF SOUTHERN CALIFORNIA makes no representations about
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* the suitability of this software for any purpose. THIS SOFTWARE IS
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* PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Other copyrights might apply to parts of this software and are so
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* noted when applicable.
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*/
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#define RSRR_SERV_PATH "/tmp/.rsrr_svr"
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/* Note this needs to be 14 chars for 4.3 BSD compatibility */
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#define RSRR_CLI_PATH "/tmp/.rsrr_cli"
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#define RSRR_MAX_LEN 2048
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#define RSRR_HEADER_LEN (sizeof(struct rsrr_header))
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#define RSRR_RQ_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rq))
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#define RSRR_RR_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rr))
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#define RSRR_VIF_LEN (sizeof(struct rsrr_vif))
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/* Current maximum number of vifs. */
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#define RSRR_MAX_VIFS 32
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/* Maximum acceptable version */
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#define RSRR_MAX_VERSION 1
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/* RSRR message types */
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#define RSRR_ALL_TYPES 0
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#define RSRR_INITIAL_QUERY 1
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#define RSRR_INITIAL_REPLY 2
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#define RSRR_ROUTE_QUERY 3
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#define RSRR_ROUTE_REPLY 4
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/* RSRR Initial Reply (Vif) Status bits
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* Each definition represents the position of the bit from right to left.
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*
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* Right-most bit is the disabled bit, set if the vif is administratively
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* disabled.
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*/
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#define RSRR_DISABLED_BIT 0
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/* All other bits are zeroes */
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/* RSRR Route Query/Reply flag bits
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* Each definition represents the position of the bit from right to left.
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*
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* Right-most bit is the Route Change Notification bit, set if the
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* reservation protocol wishes to receive notification of
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* a route change for the source-destination pair listed in the query.
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* Notification is in the form of an unsolicitied Route Reply.
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*/
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#define RSRR_NOTIFICATION_BIT 0
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/* Next bit indicates an error returning the Route Reply. */
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#define RSRR_ERROR_BIT 1
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/* All other bits are zeroes */
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/* Definition of an RSRR message header.
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* An Initial Query uses only the header, and an Initial Reply uses
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* the header and a list of vifs.
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*/
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struct rsrr_header {
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u_char version; /* RSRR Version, currently 1 */
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u_char type; /* type of message, as defined above */
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u_char flags; /* flags; defined by type */
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u_char num; /* number; defined by type */
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};
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/* Definition of a vif as seen by the reservation protocol.
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*
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* Routing gives the reservation protocol a list of vifs in the
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* Initial Reply.
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*
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* We explicitly list the ID because we can't assume that all routing
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* protocols will use the same numbering scheme.
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*
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* The status is a bitmask of status flags, as defined above. It is the
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* responsibility of the reservation protocol to perform any status checks
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* if it uses the MULTICAST_VIF socket option.
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*
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* The threshold indicates the ttl an outgoing packet needs in order to
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* be forwarded. The reservation protocol must perform this check itself if
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* it uses the MULTICAST_VIF socket option.
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*
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* The local address is the address of the physical interface over which
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* packets are sent.
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*/
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struct rsrr_vif {
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u_char id; /* vif id */
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u_char threshold; /* vif threshold ttl */
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u_short status; /* vif status bitmask */
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struct in_addr local_addr; /* vif local address */
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};
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/* Definition of an RSRR Route Query.
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*
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* The query asks routing for the forwarding entry for a particular
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* source and destination. The query ID uniquely identifies the query
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* for the reservation protocol. Thus, the combination of the client's
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* address and the query ID forms a unique identifier for routing.
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* Flags are defined above.
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*/
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struct rsrr_rq {
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struct in_addr dest_addr; /* destination */
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struct in_addr source_addr; /* source */
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u_long query_id; /* query ID */
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};
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/* Definition of an RSRR Route Reply.
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*
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* Routing uses the reply to give the reservation protocol the
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* forwarding entry for a source-destination pair. Routing copies the
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* query ID from the query and fills in the incoming vif and a bitmask
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* of the outgoing vifs.
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* Flags are defined above.
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*/
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struct rsrr_rr {
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struct in_addr dest_addr; /* destination */
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struct in_addr source_addr; /* source */
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u_long query_id; /* query ID */
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u_short in_vif; /* incoming vif */
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u_short reserved; /* reserved */
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u_long out_vif_bm; /* outgoing vif bitmask */
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};
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