221 lines
7.0 KiB
C
221 lines
7.0 KiB
C
/* $NetBSD: mpls_proto.c,v 1.5 2013/07/23 11:11:55 kefren Exp $ */
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/*
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Mihai Chelaru <kefren@NetBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mpls_proto.c,v 1.5 2013/07/23 11:11:55 kefren Exp $");
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#include "opt_inet.h"
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#include "opt_mbuftrace.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/domain.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <net/route.h>
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#include <netmpls/mpls.h>
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#include <netmpls/mpls_var.h>
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struct ifqueue mplsintrq;
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static int mpls_usrreq(struct socket *, int, struct mbuf *, struct mbuf *,
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struct mbuf *, struct lwp *);
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static void sysctl_net_mpls_setup(struct sysctllog **);
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#ifdef MBUFTRACE
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struct mowner mpls_owner = MOWNER_INIT("MPLS", "");
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#endif
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int mpls_defttl = 255;
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int mpls_mapttl_inet = 1;
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int mpls_mapttl_inet6 = 1;
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int mpls_icmp_respond = 0;
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int mpls_forwarding = 0;
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int mpls_accept = 0;
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int mpls_mapprec_inet = 1;
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int mpls_mapclass_inet6 = 1;
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int mpls_rfc4182 = 1;
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void mpls_init(void)
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{
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#ifdef MBUFTRACE
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MOWNER_ATTACH(&mpls_owner);
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#endif
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memset(&mplsintrq, 0, sizeof(mplsintrq));
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mplsintrq.ifq_maxlen = 256;
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sysctl_net_mpls_setup(NULL);
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}
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DOMAIN_DEFINE(mplsdomain);
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const struct protosw mplssw[] = {
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{ .pr_domain = &mplsdomain,
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.pr_init = mpls_init,
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},
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{
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.pr_type = SOCK_DGRAM,
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.pr_domain = &mplsdomain,
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.pr_flags = PR_ATOMIC | PR_ADDR,
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.pr_usrreq = mpls_usrreq,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &mplsdomain,
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.pr_flags = PR_ATOMIC | PR_ADDR,
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.pr_usrreq = mpls_usrreq,
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},
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};
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struct domain mplsdomain = {
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.dom_family = PF_MPLS,
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.dom_name = "MPLS",
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.dom_init = NULL,
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.dom_externalize = NULL,
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.dom_dispose = NULL,
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.dom_protosw = mplssw,
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.dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)],
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.dom_rtattach = rt_inithead,
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.dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3,
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.dom_maxrtkey = sizeof(union mpls_shim),
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.dom_ifattach = NULL,
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.dom_ifdetach = NULL,
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.dom_ifqueues = { &mplsintrq, NULL },
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.dom_link = { NULL },
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.dom_mowner = MOWNER_INIT("MPLS", ""),
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.dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr),
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.dom_sa_cmplen = sizeof(union mpls_shim),
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.dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache)
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};
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static int
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mpls_usrreq(struct socket *so, int req, struct mbuf *m,
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struct mbuf *nam, struct mbuf *control, struct lwp *l)
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{
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int error = EOPNOTSUPP;
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if ((req == PRU_ATTACH) &&
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(so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0)) {
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int s = splsoftnet();
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error = soreserve(so, 8192, 8192);
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splx(s);
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}
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return error;
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}
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/*
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* Sysctl for MPLS variables.
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*/
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static void
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sysctl_net_mpls_setup(struct sysctllog **clog)
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{
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "net", NULL,
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NULL, 0, NULL, 0,
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CTL_NET, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "mpls", NULL,
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NULL, 0, NULL, 0,
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CTL_NET, PF_MPLS, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "ttl",
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SYSCTL_DESCR("Default TTL"),
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NULL, 0, &mpls_defttl, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "forwarding",
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SYSCTL_DESCR("MPLS forwarding"),
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NULL, 0, &mpls_forwarding, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "accept",
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SYSCTL_DESCR("Accept MPLS Frames"),
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NULL, 0, &mpls_accept, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "ifq_len",
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SYSCTL_DESCR("MPLS queue length"),
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NULL, 0, &mplsintrq.ifq_maxlen, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "rfc4182",
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SYSCTL_DESCR("RFC 4182 conformance"),
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NULL, 0, &mpls_rfc4182, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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#ifdef INET
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "inet_mapttl",
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SYSCTL_DESCR("Map IP TTL"),
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NULL, 0, &mpls_mapttl_inet, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "inet_map_prec",
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SYSCTL_DESCR("Map IP Prec"),
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NULL, 0, &mpls_mapprec_inet, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "icmp_respond",
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SYSCTL_DESCR("Emit ICMP packets on errors"),
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NULL, 0, &mpls_icmp_respond, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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#endif
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#ifdef INET6
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "inet6_mapttl",
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SYSCTL_DESCR("Map IP6 TTL"),
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NULL, 0, &mpls_mapttl_inet6, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_INT, "inet6_map_prec",
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SYSCTL_DESCR("Map IP6 class"),
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NULL, 0, &mpls_mapclass_inet6, 0,
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CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL);
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#endif
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}
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