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NetBSD/sys/netmpls/mpls_proto.c

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/* $NetBSD: mpls_proto.c,v 1.4 2013/07/18 06:23:07 kefren Exp $ */
/*
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mihai Chelaru <kefren@NetBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mpls_proto.c,v 1.4 2013/07/18 06:23:07 kefren Exp $");
#include "opt_inet.h"
#include "opt_mbuftrace.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <net/route.h>
#include <netmpls/mpls.h>
#include <netmpls/mpls_var.h>
struct ifqueue mplsintrq;
static int mpls_usrreq(struct socket *, int, struct mbuf *, struct mbuf *,
struct mbuf *, struct lwp *);
static void sysctl_net_mpls_setup(struct sysctllog **);
#ifdef MBUFTRACE
struct mowner mpls_owner = MOWNER_INIT("MPLS", "");
#endif
int mpls_defttl = 255;
int mpls_mapttl_inet = 1;
int mpls_mapttl_inet6 = 1;
int mpls_icmp_respond = 0;
int mpls_forwarding = 0;
int mpls_accept = 0;
int mpls_mapprec_inet = 1;
int mpls_mapclass_inet6 = 1;
void mpls_init(void)
{
#ifdef MBUFTRACE
MOWNER_ATTACH(&mpls_owner);
#endif
memset(&mplsintrq, 0, sizeof(mplsintrq));
mplsintrq.ifq_maxlen = 256;
sysctl_net_mpls_setup(NULL);
}
DOMAIN_DEFINE(mplsdomain);
const struct protosw mplssw[] = {
{ .pr_domain = &mplsdomain,
.pr_init = mpls_init,
},
{
.pr_type = SOCK_DGRAM,
.pr_domain = &mplsdomain,
.pr_flags = PR_ATOMIC | PR_ADDR,
.pr_usrreq = mpls_usrreq,
},
{
.pr_type = SOCK_RAW,
.pr_domain = &mplsdomain,
.pr_flags = PR_ATOMIC | PR_ADDR,
.pr_usrreq = mpls_usrreq,
},
};
struct domain mplsdomain = {
.dom_family = PF_MPLS,
.dom_name = "MPLS",
.dom_init = NULL,
.dom_externalize = NULL,
.dom_dispose = NULL,
.dom_protosw = mplssw,
.dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)],
.dom_rtattach = rt_inithead,
.dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3,
.dom_maxrtkey = sizeof(union mpls_shim),
.dom_ifattach = NULL,
.dom_ifdetach = NULL,
.dom_ifqueues = { &mplsintrq, NULL },
.dom_link = { NULL },
.dom_mowner = MOWNER_INIT("MPLS", ""),
.dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr),
.dom_sa_cmplen = sizeof(union mpls_shim),
.dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache)
};
static int
mpls_usrreq(struct socket *so, int req, struct mbuf *m,
struct mbuf *nam, struct mbuf *control, struct lwp *l)
{
int error = EOPNOTSUPP;
if ((req == PRU_ATTACH) &&
(so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0)) {
int s = splsoftnet();
error = soreserve(so, 8192, 8192);
splx(s);
}
return error;
}
/*
* Sysctl for MPLS variables.
*/
static void
sysctl_net_mpls_setup(struct sysctllog **clog)
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "net", NULL,
NULL, 0, NULL, 0,
CTL_NET, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "mpls", NULL,
NULL, 0, NULL, 0,
CTL_NET, PF_MPLS, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "ttl",
SYSCTL_DESCR("Default TTL"),
NULL, 0, &mpls_defttl, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "forwarding",
SYSCTL_DESCR("MPLS forwarding"),
NULL, 0, &mpls_forwarding, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "accept",
SYSCTL_DESCR("Accept MPLS Frames"),
NULL, 0, &mpls_accept, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "ifq_len",
SYSCTL_DESCR("MPLS queue length"),
NULL, 0, &mplsintrq.ifq_maxlen, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
#ifdef INET
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "inet_mapttl",
SYSCTL_DESCR("Map IP TTL"),
NULL, 0, &mpls_mapttl_inet, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "inet_map_prec",
SYSCTL_DESCR("Map IP Prec"),
NULL, 0, &mpls_mapprec_inet, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "icmp_respond",
SYSCTL_DESCR("Emit ICMP packets on errors"),
NULL, 0, &mpls_icmp_respond, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
#endif
#ifdef INET6
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "inet6_mapttl",
SYSCTL_DESCR("Map IP6 TTL"),
NULL, 0, &mpls_mapttl_inet6, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "inet6_map_prec",
SYSCTL_DESCR("Map IP6 class"),
NULL, 0, &mpls_mapclass_inet6, 0,
CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
#endif
}
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