1 /* $NetBSD: mpls_proto.c,v 1.9 2014/05/20 19:04:00 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@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 1.9 2014/05/20 19:04:00 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_attach(struct socket *, int); 53 static void sysctl_net_mpls_setup(struct sysctllog **); 54 55 #ifdef MBUFTRACE 56 struct mowner mpls_owner = MOWNER_INIT("MPLS", ""); 57 #endif 58 59 int mpls_defttl = 255; 60 int mpls_mapttl_inet = 1; 61 int mpls_mapttl_inet6 = 1; 62 int mpls_icmp_respond = 0; 63 int mpls_forwarding = 0; 64 int mpls_accept = 0; 65 int mpls_mapprec_inet = 1; 66 int mpls_mapclass_inet6 = 1; 67 int mpls_rfc4182 = 1; 68 69 void mpls_init(void) 70 { 71 #ifdef MBUFTRACE 72 MOWNER_ATTACH(&mpls_owner); 73 #endif 74 memset(&mplsintrq, 0, sizeof(mplsintrq)); 75 mplsintrq.ifq_maxlen = 256; 76 77 sysctl_net_mpls_setup(NULL); 78 } 79 80 static int 81 mpls_attach(struct socket *so, int proto) 82 { 83 int error = EOPNOTSUPP; 84 85 sosetlock(so); 86 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 87 error = soreserve(so, 8192, 8192); 88 } 89 return error; 90 } 91 92 static void 93 mpls_detach(struct socket *so) 94 { 95 } 96 97 static int 98 mpls_usrreq(struct socket *so, int req, struct mbuf *m, 99 struct mbuf *nam, struct mbuf *control, struct lwp *l) 100 { 101 return EOPNOTSUPP; 102 } 103 104 /* 105 * Sysctl for MPLS variables. 106 */ 107 static void 108 sysctl_net_mpls_setup(struct sysctllog **clog) 109 { 110 111 sysctl_createv(clog, 0, NULL, NULL, 112 CTLFLAG_PERMANENT, 113 CTLTYPE_NODE, "mpls", NULL, 114 NULL, 0, NULL, 0, 115 CTL_NET, PF_MPLS, CTL_EOL); 116 117 sysctl_createv(clog, 0, NULL, NULL, 118 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 119 CTLTYPE_INT, "ttl", 120 SYSCTL_DESCR("Default TTL"), 121 NULL, 0, &mpls_defttl, 0, 122 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 123 sysctl_createv(clog, 0, NULL, NULL, 124 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 125 CTLTYPE_INT, "forwarding", 126 SYSCTL_DESCR("MPLS forwarding"), 127 NULL, 0, &mpls_forwarding, 0, 128 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 129 sysctl_createv(clog, 0, NULL, NULL, 130 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 131 CTLTYPE_INT, "accept", 132 SYSCTL_DESCR("Accept MPLS Frames"), 133 NULL, 0, &mpls_accept, 0, 134 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 135 sysctl_createv(clog, 0, NULL, NULL, 136 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 137 CTLTYPE_INT, "ifq_len", 138 SYSCTL_DESCR("MPLS queue length"), 139 NULL, 0, &mplsintrq.ifq_maxlen, 0, 140 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 141 sysctl_createv(clog, 0, NULL, NULL, 142 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 143 CTLTYPE_INT, "rfc4182", 144 SYSCTL_DESCR("RFC 4182 conformance"), 145 NULL, 0, &mpls_rfc4182, 0, 146 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 147 #ifdef INET 148 sysctl_createv(clog, 0, NULL, NULL, 149 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 150 CTLTYPE_INT, "inet_mapttl", 151 SYSCTL_DESCR("Map IP TTL"), 152 NULL, 0, &mpls_mapttl_inet, 0, 153 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 154 sysctl_createv(clog, 0, NULL, NULL, 155 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 156 CTLTYPE_INT, "inet_map_prec", 157 SYSCTL_DESCR("Map IP Prec"), 158 NULL, 0, &mpls_mapprec_inet, 0, 159 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 160 sysctl_createv(clog, 0, NULL, NULL, 161 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 162 CTLTYPE_INT, "icmp_respond", 163 SYSCTL_DESCR("Emit ICMP packets on errors"), 164 NULL, 0, &mpls_icmp_respond, 0, 165 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 166 #endif 167 #ifdef INET6 168 sysctl_createv(clog, 0, NULL, NULL, 169 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 170 CTLTYPE_INT, "inet6_mapttl", 171 SYSCTL_DESCR("Map IP6 TTL"), 172 NULL, 0, &mpls_mapttl_inet6, 0, 173 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 174 sysctl_createv(clog, 0, NULL, NULL, 175 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 176 CTLTYPE_INT, "inet6_map_prec", 177 SYSCTL_DESCR("Map IP6 class"), 178 NULL, 0, &mpls_mapclass_inet6, 0, 179 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 180 #endif 181 } 182 183 DOMAIN_DEFINE(mplsdomain); 184 185 PR_WRAP_USRREQS(mpls) 186 #define mpls_attach mpls_attach_wrapper 187 #define mpls_detach mpls_detach_wrapper 188 #define mpls_usrreq mpls_usrreq_wrapper 189 190 static const struct pr_usrreqs mpls_usrreqs = { 191 .pr_attach = mpls_attach, 192 .pr_detach = mpls_detach, 193 .pr_generic = mpls_usrreq, 194 }; 195 196 const struct protosw mplssw[] = { 197 { .pr_domain = &mplsdomain, 198 .pr_init = mpls_init, 199 }, 200 { 201 .pr_type = SOCK_DGRAM, 202 .pr_domain = &mplsdomain, 203 .pr_flags = PR_ATOMIC | PR_ADDR, 204 .pr_usrreqs = &mpls_usrreqs, 205 }, 206 { 207 .pr_type = SOCK_RAW, 208 .pr_domain = &mplsdomain, 209 .pr_flags = PR_ATOMIC | PR_ADDR, 210 .pr_usrreqs = &mpls_usrreqs, 211 }, 212 }; 213 214 struct domain mplsdomain = { 215 .dom_family = PF_MPLS, 216 .dom_name = "MPLS", 217 .dom_init = NULL, 218 .dom_externalize = NULL, 219 .dom_dispose = NULL, 220 .dom_protosw = mplssw, 221 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 222 .dom_rtattach = rt_inithead, 223 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 224 .dom_maxrtkey = sizeof(union mpls_shim), 225 .dom_ifattach = NULL, 226 .dom_ifdetach = NULL, 227 .dom_ifqueues = { &mplsintrq, NULL }, 228 .dom_link = { NULL }, 229 .dom_mowner = MOWNER_INIT("MPLS", ""), 230 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 231 .dom_sa_cmplen = sizeof(union mpls_shim), 232 .dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache) 233 }; 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