1 /* $NetBSD: mpls_proto.c,v 1.2 2011/03/31 19:40:53 dyoung 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 1.2 2011/03/31 19:40:53 dyoung 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 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 68 void mpls_init() 69 { 70 #ifdef MBUFTRACE 71 MOWNER_ATTACH(&mpls_owner); 72 #endif 73 memset(&mplsintrq, 0, sizeof(mplsintrq)); 74 mplsintrq.ifq_maxlen = 256; 75 } 76 77 DOMAIN_DEFINE(mplsdomain); 78 79 const struct protosw mplssw[] = { 80 { .pr_domain = &mplsdomain, 81 .pr_init = mpls_init, 82 }, 83 { 84 .pr_type = SOCK_DGRAM, 85 .pr_domain = &mplsdomain, 86 .pr_flags = PR_ATOMIC | PR_ADDR, 87 .pr_usrreq = mpls_usrreq, 88 }, 89 { 90 .pr_type = SOCK_RAW, 91 .pr_domain = &mplsdomain, 92 .pr_flags = PR_ATOMIC | PR_ADDR, 93 .pr_usrreq = mpls_usrreq, 94 }, 95 }; 96 97 struct domain mplsdomain = { 98 .dom_family = PF_MPLS, 99 .dom_name = "MPLS", 100 .dom_init = NULL, 101 .dom_externalize = NULL, 102 .dom_dispose = NULL, 103 .dom_protosw = mplssw, 104 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 105 .dom_rtattach = rt_inithead, 106 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 107 .dom_maxrtkey = sizeof(union mpls_shim), 108 .dom_ifattach = NULL, 109 .dom_ifdetach = NULL, 110 .dom_ifqueues = { &mplsintrq, NULL }, 111 .dom_link = { NULL }, 112 .dom_mowner = MOWNER_INIT("MPLS", ""), 113 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 114 .dom_sa_cmplen = sizeof(union mpls_shim), 115 .dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache) 116 }; 117 118 static int 119 mpls_usrreq(struct socket *so, int req, struct mbuf *m, 120 struct mbuf *nam, struct mbuf *control, struct lwp *l) 121 { 122 int error = EOPNOTSUPP; 123 124 if ((req == PRU_ATTACH) && 125 (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0)) { 126 int s = splsoftnet(); 127 error = soreserve(so, 8192, 8192); 128 splx(s); 129 } 130 131 return error; 132 } 133 134 /* 135 * Sysctl for MPLS variables. 136 */ 137 SYSCTL_SETUP(sysctl_net_mpls_setup, "sysctl net.mpls subtree setup") 138 { 139 140 sysctl_createv(clog, 0, NULL, NULL, 141 CTLFLAG_PERMANENT, 142 CTLTYPE_NODE, "net", NULL, 143 NULL, 0, NULL, 0, 144 CTL_NET, CTL_EOL); 145 sysctl_createv(clog, 0, NULL, NULL, 146 CTLFLAG_PERMANENT, 147 CTLTYPE_NODE, "mpls", NULL, 148 NULL, 0, NULL, 0, 149 CTL_NET, PF_MPLS, CTL_EOL); 150 151 sysctl_createv(clog, 0, NULL, NULL, 152 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 153 CTLTYPE_INT, "ttl", 154 SYSCTL_DESCR("Default TTL"), 155 NULL, 0, &mpls_defttl, 0, 156 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 157 sysctl_createv(clog, 0, NULL, NULL, 158 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 159 CTLTYPE_INT, "forwarding", 160 SYSCTL_DESCR("MPLS forwarding"), 161 NULL, 0, &mpls_forwarding, 0, 162 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 163 sysctl_createv(clog, 0, NULL, NULL, 164 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 165 CTLTYPE_INT, "accept", 166 SYSCTL_DESCR("Accept MPLS Frames"), 167 NULL, 0, &mpls_accept, 0, 168 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 169 sysctl_createv(clog, 0, NULL, NULL, 170 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 171 CTLTYPE_INT, "ifq_len", 172 SYSCTL_DESCR("MPLS queue length"), 173 NULL, 0, &mplsintrq.ifq_maxlen, 0, 174 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 175 #ifdef INET 176 sysctl_createv(clog, 0, NULL, NULL, 177 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 178 CTLTYPE_INT, "inet_mapttl", 179 SYSCTL_DESCR("Map IP TTL"), 180 NULL, 0, &mpls_mapttl_inet, 0, 181 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 182 sysctl_createv(clog, 0, NULL, NULL, 183 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 184 CTLTYPE_INT, "inet_map_prec", 185 SYSCTL_DESCR("Map IP Prec"), 186 NULL, 0, &mpls_mapprec_inet, 0, 187 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 188 sysctl_createv(clog, 0, NULL, NULL, 189 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 190 CTLTYPE_INT, "icmp_respond", 191 SYSCTL_DESCR("Emit ICMP packets on errors"), 192 NULL, 0, &mpls_icmp_respond, 0, 193 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 194 #endif 195 #ifdef INET6 196 sysctl_createv(clog, 0, NULL, NULL, 197 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 198 CTLTYPE_INT, "inet6_mapttl", 199 SYSCTL_DESCR("Map IP6 TTL"), 200 NULL, 0, &mpls_mapttl_inet6, 0, 201 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 202 sysctl_createv(clog, 0, NULL, NULL, 203 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 204 CTLTYPE_INT, "inet6_map_prec", 205 SYSCTL_DESCR("Map IP6 class"), 206 NULL, 0, &mpls_mapclass_inet6, 0, 207 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 208 #endif 209 } 210