mpls_proto.c revision 1.7
1 /* $NetBSD: mpls_proto.c,v 1.7 2014/05/18 14:46:16 rmind Exp $ */ 2 3 /* 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mihai Chelaru <kefren (at) NetBSD.org> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: mpls_proto.c,v 1.7 2014/05/18 14:46:16 rmind Exp $"); 34 35 #include "opt_inet.h" 36 #include "opt_mbuftrace.h" 37 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/socketvar.h> 43 #include <sys/sysctl.h> 44 45 #include <net/route.h> 46 47 #include <netmpls/mpls.h> 48 #include <netmpls/mpls_var.h> 49 50 struct ifqueue mplsintrq; 51 52 static int mpls_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, 53 struct mbuf *, struct lwp *); 54 static void sysctl_net_mpls_setup(struct sysctllog **); 55 56 #ifdef MBUFTRACE 57 struct mowner mpls_owner = MOWNER_INIT("MPLS", ""); 58 #endif 59 60 int mpls_defttl = 255; 61 int mpls_mapttl_inet = 1; 62 int mpls_mapttl_inet6 = 1; 63 int mpls_icmp_respond = 0; 64 int mpls_forwarding = 0; 65 int mpls_accept = 0; 66 int mpls_mapprec_inet = 1; 67 int mpls_mapclass_inet6 = 1; 68 int mpls_rfc4182 = 1; 69 70 void mpls_init(void) 71 { 72 #ifdef MBUFTRACE 73 MOWNER_ATTACH(&mpls_owner); 74 #endif 75 memset(&mplsintrq, 0, sizeof(mplsintrq)); 76 mplsintrq.ifq_maxlen = 256; 77 78 sysctl_net_mpls_setup(NULL); 79 } 80 81 static int 82 mpls_usrreq(struct socket *so, int req, struct mbuf *m, 83 struct mbuf *nam, struct mbuf *control, struct lwp *l) 84 { 85 int error = EOPNOTSUPP; 86 87 if ((req == PRU_ATTACH) && 88 (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0)) { 89 int s = splsoftnet(); 90 error = soreserve(so, 8192, 8192); 91 splx(s); 92 } 93 94 return error; 95 } 96 97 /* 98 * Sysctl for MPLS variables. 99 */ 100 static void 101 sysctl_net_mpls_setup(struct sysctllog **clog) 102 { 103 104 sysctl_createv(clog, 0, NULL, NULL, 105 CTLFLAG_PERMANENT, 106 CTLTYPE_NODE, "mpls", NULL, 107 NULL, 0, NULL, 0, 108 CTL_NET, PF_MPLS, CTL_EOL); 109 110 sysctl_createv(clog, 0, NULL, NULL, 111 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 112 CTLTYPE_INT, "ttl", 113 SYSCTL_DESCR("Default TTL"), 114 NULL, 0, &mpls_defttl, 0, 115 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 116 sysctl_createv(clog, 0, NULL, NULL, 117 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 118 CTLTYPE_INT, "forwarding", 119 SYSCTL_DESCR("MPLS forwarding"), 120 NULL, 0, &mpls_forwarding, 0, 121 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 122 sysctl_createv(clog, 0, NULL, NULL, 123 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 124 CTLTYPE_INT, "accept", 125 SYSCTL_DESCR("Accept MPLS Frames"), 126 NULL, 0, &mpls_accept, 0, 127 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 128 sysctl_createv(clog, 0, NULL, NULL, 129 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 130 CTLTYPE_INT, "ifq_len", 131 SYSCTL_DESCR("MPLS queue length"), 132 NULL, 0, &mplsintrq.ifq_maxlen, 0, 133 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 134 sysctl_createv(clog, 0, NULL, NULL, 135 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 136 CTLTYPE_INT, "rfc4182", 137 SYSCTL_DESCR("RFC 4182 conformance"), 138 NULL, 0, &mpls_rfc4182, 0, 139 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 140 #ifdef INET 141 sysctl_createv(clog, 0, NULL, NULL, 142 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 143 CTLTYPE_INT, "inet_mapttl", 144 SYSCTL_DESCR("Map IP TTL"), 145 NULL, 0, &mpls_mapttl_inet, 0, 146 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 147 sysctl_createv(clog, 0, NULL, NULL, 148 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 149 CTLTYPE_INT, "inet_map_prec", 150 SYSCTL_DESCR("Map IP Prec"), 151 NULL, 0, &mpls_mapprec_inet, 0, 152 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 153 sysctl_createv(clog, 0, NULL, NULL, 154 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 155 CTLTYPE_INT, "icmp_respond", 156 SYSCTL_DESCR("Emit ICMP packets on errors"), 157 NULL, 0, &mpls_icmp_respond, 0, 158 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 159 #endif 160 #ifdef INET6 161 sysctl_createv(clog, 0, NULL, NULL, 162 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 163 CTLTYPE_INT, "inet6_mapttl", 164 SYSCTL_DESCR("Map IP6 TTL"), 165 NULL, 0, &mpls_mapttl_inet6, 0, 166 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 167 sysctl_createv(clog, 0, NULL, NULL, 168 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 169 CTLTYPE_INT, "inet6_map_prec", 170 SYSCTL_DESCR("Map IP6 class"), 171 NULL, 0, &mpls_mapclass_inet6, 0, 172 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 173 #endif 174 } 175 176 DOMAIN_DEFINE(mplsdomain); 177 178 PR_WRAP_USRREQ(mpls_usrreq) 179 180 #define mpls_usrreq mpls_usrreq_wrapper 181 182 static const struct pr_usrreqs mpls_usrreqs = { 183 .pr_generic = mpls_usrreq, 184 }; 185 186 const struct protosw mplssw[] = { 187 { .pr_domain = &mplsdomain, 188 .pr_init = mpls_init, 189 }, 190 { 191 .pr_type = SOCK_DGRAM, 192 .pr_domain = &mplsdomain, 193 .pr_flags = PR_ATOMIC | PR_ADDR, 194 .pr_usrreqs = &mpls_usrreqs, 195 }, 196 { 197 .pr_type = SOCK_RAW, 198 .pr_domain = &mplsdomain, 199 .pr_flags = PR_ATOMIC | PR_ADDR, 200 .pr_usrreqs = &mpls_usrreqs, 201 }, 202 }; 203 204 struct domain mplsdomain = { 205 .dom_family = PF_MPLS, 206 .dom_name = "MPLS", 207 .dom_init = NULL, 208 .dom_externalize = NULL, 209 .dom_dispose = NULL, 210 .dom_protosw = mplssw, 211 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 212 .dom_rtattach = rt_inithead, 213 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 214 .dom_maxrtkey = sizeof(union mpls_shim), 215 .dom_ifattach = NULL, 216 .dom_ifdetach = NULL, 217 .dom_ifqueues = { &mplsintrq, NULL }, 218 .dom_link = { NULL }, 219 .dom_mowner = MOWNER_INIT("MPLS", ""), 220 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 221 .dom_sa_cmplen = sizeof(union mpls_shim), 222 .dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache) 223 }; 224
Indexes created Wed Sep 24 02:09:48 GMT 2025