diff options
Diffstat (limited to 'ext/sctp/usrsctp/usrsctplib/user_route.h')
| -rw-r--r-- | ext/sctp/usrsctp/usrsctplib/user_route.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/ext/sctp/usrsctp/usrsctplib/user_route.h b/ext/sctp/usrsctp/usrsctplib/user_route.h new file mode 100644 index 000000000..82b07d769 --- /dev/null +++ b/ext/sctp/usrsctp/usrsctplib/user_route.h @@ -0,0 +1,130 @@ +/*- + * 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 |