mpls_proto.c revision 1.5
1 /* $NetBSD: mpls_proto.c,v 1.5 2013/07/23 11:11:55 kefren 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 1.5 2013/07/23 11:11:55 kefren 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 DOMAIN_DEFINE(mplsdomain); 82 83 const struct protosw mplssw[] = { 84 { .pr_domain = &mplsdomain, 85 .pr_init = mpls_init, 86 }, 87 { 88 .pr_type = SOCK_DGRAM, 89 .pr_domain = &mplsdomain, 90 .pr_flags = PR_ATOMIC | PR_ADDR, 91 .pr_usrreq = mpls_usrreq, 92 }, 93 { 94 .pr_type = SOCK_RAW, 95 .pr_domain = &mplsdomain, 96 .pr_flags = PR_ATOMIC | PR_ADDR, 97 .pr_usrreq = mpls_usrreq, 98 }, 99 }; 100 101 struct domain mplsdomain = { 102 .dom_family = PF_MPLS, 103 .dom_name = "MPLS", 104 .dom_init = NULL, 105 .dom_externalize = NULL, 106 .dom_dispose = NULL, 107 .dom_protosw = mplssw, 108 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 109 .dom_rtattach = rt_inithead, 110 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 111 .dom_maxrtkey = sizeof(union mpls_shim), 112 .dom_ifattach = NULL, 113 .dom_ifdetach = NULL, 114 .dom_ifqueues = { &mplsintrq, NULL }, 115 .dom_link = { NULL }, 116 .dom_mowner = MOWNER_INIT("MPLS", ""), 117 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 118 .dom_sa_cmplen = sizeof(union mpls_shim), 119 .dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache) 120 }; 121 122 static int 123 mpls_usrreq(struct socket *so, int req, struct mbuf *m, 124 struct mbuf *nam, struct mbuf *control, struct lwp *l) 125 { 126 int error = EOPNOTSUPP; 127 128 if ((req == PRU_ATTACH) && 129 (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0)) { 130 int s = splsoftnet(); 131 error = soreserve(so, 8192, 8192); 132 splx(s); 133 } 134 135 return error; 136 } 137 138 /* 139 * Sysctl for MPLS variables. 140 */ 141 static void 142 sysctl_net_mpls_setup(struct sysctllog **clog) 143 { 144 145 sysctl_createv(clog, 0, NULL, NULL, 146 CTLFLAG_PERMANENT, 147 CTLTYPE_NODE, "net", NULL, 148 NULL, 0, NULL, 0, 149 CTL_NET, CTL_EOL); 150 sysctl_createv(clog, 0, NULL, NULL, 151 CTLFLAG_PERMANENT, 152 CTLTYPE_NODE, "mpls", NULL, 153 NULL, 0, NULL, 0, 154 CTL_NET, PF_MPLS, CTL_EOL); 155 156 sysctl_createv(clog, 0, NULL, NULL, 157 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 158 CTLTYPE_INT, "ttl", 159 SYSCTL_DESCR("Default TTL"), 160 NULL, 0, &mpls_defttl, 0, 161 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 162 sysctl_createv(clog, 0, NULL, NULL, 163 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 164 CTLTYPE_INT, "forwarding", 165 SYSCTL_DESCR("MPLS forwarding"), 166 NULL, 0, &mpls_forwarding, 0, 167 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 168 sysctl_createv(clog, 0, NULL, NULL, 169 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 170 CTLTYPE_INT, "accept", 171 SYSCTL_DESCR("Accept MPLS Frames"), 172 NULL, 0, &mpls_accept, 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, "ifq_len", 177 SYSCTL_DESCR("MPLS queue length"), 178 NULL, 0, &mplsintrq.ifq_maxlen, 0, 179 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 180 sysctl_createv(clog, 0, NULL, NULL, 181 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 182 CTLTYPE_INT, "rfc4182", 183 SYSCTL_DESCR("RFC 4182 conformance"), 184 NULL, 0, &mpls_rfc4182, 0, 185 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 186 #ifdef INET 187 sysctl_createv(clog, 0, NULL, NULL, 188 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 189 CTLTYPE_INT, "inet_mapttl", 190 SYSCTL_DESCR("Map IP TTL"), 191 NULL, 0, &mpls_mapttl_inet, 0, 192 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 193 sysctl_createv(clog, 0, NULL, NULL, 194 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 195 CTLTYPE_INT, "inet_map_prec", 196 SYSCTL_DESCR("Map IP Prec"), 197 NULL, 0, &mpls_mapprec_inet, 0, 198 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 199 sysctl_createv(clog, 0, NULL, NULL, 200 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 201 CTLTYPE_INT, "icmp_respond", 202 SYSCTL_DESCR("Emit ICMP packets on errors"), 203 NULL, 0, &mpls_icmp_respond, 0, 204 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 205 #endif 206 #ifdef INET6 207 sysctl_createv(clog, 0, NULL, NULL, 208 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 209 CTLTYPE_INT, "inet6_mapttl", 210 SYSCTL_DESCR("Map IP6 TTL"), 211 NULL, 0, &mpls_mapttl_inet6, 0, 212 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 213 sysctl_createv(clog, 0, NULL, NULL, 214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 215 CTLTYPE_INT, "inet6_map_prec", 216 SYSCTL_DESCR("Map IP6 class"), 217 NULL, 0, &mpls_mapclass_inet6, 0, 218 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 219 #endif 220 } 221
Indexes created Wed Sep 24 05:09:52 GMT 2025