mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-26 19:51:11 +00:00
130 lines
4.8 KiB
C
130 lines
4.8 KiB
C
/*-
|
|
* Copyright (c) 1980, 1986, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef _USER_ROUTE_H_
|
|
#define _USER_ROUTE_H_
|
|
|
|
/*
|
|
* Kernel resident routing tables.
|
|
*
|
|
* The routing tables are initialized when interface addresses
|
|
* are set by making entries for all directly connected interfaces.
|
|
*/
|
|
|
|
/*
|
|
* A route consists of a destination address and a reference
|
|
* to a routing entry. These are often held by protocols
|
|
* in their control blocks, e.g. inpcb.
|
|
*/
|
|
|
|
struct sctp_route {
|
|
struct sctp_rtentry *ro_rt;
|
|
struct sockaddr ro_dst;
|
|
};
|
|
|
|
/*
|
|
* These numbers are used by reliable protocols for determining
|
|
* retransmission behavior and are included in the routing structure.
|
|
*/
|
|
struct sctp_rt_metrics_lite {
|
|
uint32_t rmx_mtu; /* MTU for this path */
|
|
#if 0
|
|
u_long rmx_expire; /* lifetime for route, e.g. redirect */
|
|
u_long rmx_pksent; /* packets sent using this route */
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* We distinguish between routes to hosts and routes to networks,
|
|
* preferring the former if available. For each route we infer
|
|
* the interface to use from the gateway address supplied when
|
|
* the route was entered. Routes that forward packets through
|
|
* gateways are marked so that the output routines know to address the
|
|
* gateway rather than the ultimate destination.
|
|
*/
|
|
struct sctp_rtentry {
|
|
#if 0
|
|
struct radix_node rt_nodes[2]; /* tree glue, and other values */
|
|
/*
|
|
* XXX struct rtentry must begin with a struct radix_node (or two!)
|
|
* because the code does some casts of a 'struct radix_node *'
|
|
* to a 'struct rtentry *'
|
|
*/
|
|
#define rt_key(r) (*((struct sockaddr **)(&(r)->rt_nodes->rn_key)))
|
|
#define rt_mask(r) (*((struct sockaddr **)(&(r)->rt_nodes->rn_mask)))
|
|
struct sockaddr *rt_gateway; /* value */
|
|
u_long rt_flags; /* up/down?, host/net */
|
|
#endif
|
|
struct ifnet *rt_ifp; /* the answer: interface to use */
|
|
struct ifaddr *rt_ifa; /* the answer: interface address to use */
|
|
struct sctp_rt_metrics_lite rt_rmx; /* metrics used by rx'ing protocols */
|
|
long rt_refcnt; /* # held references */
|
|
#if 0
|
|
struct sockaddr *rt_genmask; /* for generation of cloned routes */
|
|
caddr_t rt_llinfo; /* pointer to link level info cache */
|
|
struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */
|
|
struct rtentry *rt_parent; /* cloning parent of this route */
|
|
#endif
|
|
struct mtx rt_mtx; /* mutex for routing entry */
|
|
};
|
|
|
|
#define RT_LOCK_INIT(_rt) mtx_init(&(_rt)->rt_mtx, "rtentry", NULL, MTX_DEF | MTX_DUPOK)
|
|
#define RT_LOCK(_rt) mtx_lock(&(_rt)->rt_mtx)
|
|
#define RT_UNLOCK(_rt) mtx_unlock(&(_rt)->rt_mtx)
|
|
#define RT_LOCK_DESTROY(_rt) mtx_destroy(&(_rt)->rt_mtx)
|
|
#define RT_LOCK_ASSERT(_rt) mtx_assert(&(_rt)->rt_mtx, MA_OWNED)
|
|
|
|
#define RT_ADDREF(_rt) do { \
|
|
RT_LOCK_ASSERT(_rt); \
|
|
KASSERT((_rt)->rt_refcnt >= 0, \
|
|
("negative refcnt %ld", (_rt)->rt_refcnt)); \
|
|
(_rt)->rt_refcnt++; \
|
|
} while (0)
|
|
#define RT_REMREF(_rt) do { \
|
|
RT_LOCK_ASSERT(_rt); \
|
|
KASSERT((_rt)->rt_refcnt > 0, \
|
|
("bogus refcnt %ld", (_rt)->rt_refcnt)); \
|
|
(_rt)->rt_refcnt--; \
|
|
} while (0)
|
|
#define RTFREE_LOCKED(_rt) do { \
|
|
if ((_rt)->rt_refcnt <= 1) { \
|
|
rtfree(_rt); \
|
|
} else { \
|
|
RT_REMREF(_rt); \
|
|
RT_UNLOCK(_rt); \
|
|
} \
|
|
/* guard against invalid refs */ \
|
|
_rt = NULL; \
|
|
} while (0)
|
|
#define RTFREE(_rt) do { \
|
|
RT_LOCK(_rt); \
|
|
RTFREE_LOCKED(_rt); \
|
|
} while (0)
|
|
#endif
|