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rsrr.h
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rsrr.h
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/*
* Copyright (c) 1993, 1998-2001.
* The 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.
*/
#define RSRR_SERV_PATH "/tmp/.rsrr_svr"
/* Note this needs to be 14 chars for 4.3 BSD compatibility */
#define RSRR_CLI_PATH "/tmp/.rsrr_cli"
#define RSRR_MAX_LEN 2048
#define RSRR_HEADER_LEN (sizeof(struct rsrr_header))
#define RSRR_RQ_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rq))
#define RSRR_RR_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rr))
#define RSRR_VIF_LEN (sizeof(struct rsrr_vif))
/* Current maximum number of vifs. */
#define RSRR_MAX_VIFS 32
/* Maximum acceptable version */
#define RSRR_MAX_VERSION 1
/* RSRR message types */
#define RSRR_ALL_TYPES 0
#define RSRR_INITIAL_QUERY 1
#define RSRR_INITIAL_REPLY 2
#define RSRR_ROUTE_QUERY 3
#define RSRR_ROUTE_REPLY 4
/* Each definition represents the position of the bit from right to left. */
/* All not defined bits are zeroes */
/* RSRR Initial Reply (Vif) Status bits
*
* 0 = disabled bit, set if the vif is administratively disabled.
*/
#define RSRR_DISABLED_BIT 0
/* RSRR Route Query/Reply flag bits
*
* 0 = Route Change Notification bit, set if the reservation protocol
* wishes to receive notification of a route change for the
* source-destination pair listed in the query. Notification is in the
* form of an unsolicitied Route Reply.
* 1 = Error bit, set if routing doesn't have a routing entry for
* the source-destination pair.
* (TODO: XXX: currently not used by rsvpd?)
* (2,3) = Shared tree (Reply only)
* = 01 if the listed sender is using a shared tree, but some other
* senders for the same destination use sender (source-specific)
* trees.
* = 10 if all senders for the destination use shared tree.
* = 00 otherwise
*/
#define RSRR_NOTIFICATION_BIT 0
#define RSRR_ERROR_BIT 1
#define RSRR_THIS_SENDER_SHARED_TREE 2
#define RSRR_ALL_SENDERS_SHARED_TREE 3
#define RSRR_SET_ALL_SENDERS_SHARED_TREE(X) \
BIT_SET((X), RSRR_ALL_SENDERS_SHARED_TREE); \
BIT_CLR((X), RSRR_THIS_SENDER_SHARED_TREE);
#define RSRR_THIS_SENDER_SHARED_TREE_SOME_OTHER_NOT(X) \
BIT_SET((X), RSRR_THIS_SENDER_SHARED_TREE); \
BIT_CLR((X), RSRR_ALL_SENDERS_SHARED_TREE)
/* Definition of an RSRR message header.
* An Initial Query uses only the header, and an Initial Reply uses
* the header and a list of vifs.
*/
struct rsrr_header {
uint8_t version; /* RSRR Version, currently 1 */
uint8_t type; /* type of message, as defined above*/
uint8_t flags; /* flags; defined by type */
uint8_t num; /* number; defined by type */
};
/* Definition of a vif as seen by the reservation protocol.
*
* Routing gives the reservation protocol a list of vifs in the
* Initial Reply.
*
* We explicitly list the ID because we can't assume that all routing
* protocols will use the same numbering scheme.
*
* The status is a bitmask of status flags, as defined above. It is the
* responsibility of the reservation protocol to perform any status checks
* if it uses the MULTICAST_VIF socket option.
*
* The threshold indicates the ttl an outgoing packet needs in order to
* be forwarded. The reservation protocol must perform this check itself if
* it uses the MULTICAST_VIF socket option.
*
* The local address is the address of the physical interface over which
* packets are sent.
*/
struct rsrr_vif {
uint8_t id; /* vif id */
uint8_t threshold; /* vif threshold ttl */
uint16_t status; /* vif status bitmask */
uint32_t local_addr; /* vif local address */
};
/* Definition of an RSRR Route Query.
*
* The query asks routing for the forwarding entry for a particular
* source and destination. The query ID uniquely identifies the query
* for the reservation protocol. Thus, the combination of the client's
* address and the query ID forms a unique identifier for routing.
* Flags are defined above.
*/
struct rsrr_rq {
uint32_t dest_addr; /* destination */
uint32_t source_addr; /* source */
uint32_t query_id; /* query ID */
};
/* Definition of an RSRR Route Reply.
*
* Routing uses the reply to give the reservation protocol the
* forwarding entry for a source-destination pair. Routing copies the
* query ID from the query and fills in the incoming vif and a bitmask
* of the outgoing vifs.
* Flags are defined above.
*/
/* TODO: XXX: in_vif is 16 bits here, but in rsrr_vif it is 8 bits.
* Bug in the spec?
*/
struct rsrr_rr {
uint32_t dest_addr; /* destination */
uint32_t source_addr; /* source */
uint32_t query_id; /* query ID */
uint16_t in_vif; /* incoming vif */
uint16_t reserved; /* reserved */
uint32_t out_vif_bm; /* outgoing vif bitmask */
};
/* TODO: XXX: THIS IS NOT IN THE SPEC! (OBSOLETE?) */
#ifdef NOT_IN_THE_SPEC
/* Definition of an RSRR Service Query/Reply.
*
* The query asks routing to perform a service for a particular
* source/destination combination. The query also lists the vif
* that the service applies to.
*/
struct rsrr_sqr {
uint32_t dest_addr; /* destination */
uint32_t source_addr; /* source */
uint32_t query_id; /* query ID */
uint16_t vif; /* vif */
uint16_t reserved; /* reserved */
};
#endif /* NOT_IN_THE_SPEC */
/**
* Local Variables:
* version-control: t
* indent-tabs-mode: t
* c-file-style: "ellemtel"
* c-basic-offset: 4
* End:
*/