if_faith.c revision 1.2.2.2
1 1.2.2.2 thorpej /* 2 1.2.2.2 thorpej * Copyright (c) 1982, 1986, 1993 3 1.2.2.2 thorpej * The Regents of the University of California. All rights reserved. 4 1.2.2.2 thorpej * 5 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 6 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 7 1.2.2.2 thorpej * are met: 8 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 9 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 10 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 11 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 12 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 13 1.2.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 14 1.2.2.2 thorpej * must display the following acknowledgement: 15 1.2.2.2 thorpej * This product includes software developed by the University of 16 1.2.2.2 thorpej * California, Berkeley and its contributors. 17 1.2.2.2 thorpej * 4. Neither the name of the University nor the names of its contributors 18 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 19 1.2.2.2 thorpej * without specific prior written permission. 20 1.2.2.2 thorpej * 21 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.2.2.2 thorpej * SUCH DAMAGE. 32 1.2.2.2 thorpej */ 33 1.2.2.2 thorpej /* 34 1.2.2.2 thorpej * derived from 35 1.2.2.2 thorpej * @(#)if_loop.c 8.1 (Berkeley) 6/10/93 36 1.2.2.2 thorpej * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp 37 1.2.2.2 thorpej */ 38 1.2.2.2 thorpej 39 1.2.2.2 thorpej /* 40 1.2.2.2 thorpej * Loopback interface driver for protocol testing and timing. 41 1.2.2.2 thorpej */ 42 1.2.2.2 thorpej #if defined(__FreeBSD__) && __FreeBSD__ >= 3 43 1.2.2.2 thorpej #include "opt_inet.h" 44 1.2.2.2 thorpej #endif 45 1.2.2.2 thorpej 46 1.2.2.2 thorpej #include "faith.h" 47 1.2.2.2 thorpej #if NFAITH > 0 48 1.2.2.2 thorpej 49 1.2.2.2 thorpej #include <sys/param.h> 50 1.2.2.2 thorpej #include <sys/systm.h> 51 1.2.2.2 thorpej #include <sys/kernel.h> 52 1.2.2.2 thorpej #include <sys/mbuf.h> 53 1.2.2.2 thorpej #include <sys/socket.h> 54 1.2.2.2 thorpej #include <sys/errno.h> 55 1.2.2.2 thorpej #include <sys/ioctl.h> 56 1.2.2.2 thorpej #include <sys/time.h> 57 1.2.2.2 thorpej #ifdef __bsdi__ 58 1.2.2.2 thorpej #include <machine/cpu.h> 59 1.2.2.2 thorpej #endif 60 1.2.2.2 thorpej 61 1.2.2.2 thorpej #include <net/if.h> 62 1.2.2.2 thorpej #include <net/if_types.h> 63 1.2.2.2 thorpej #include <net/netisr.h> 64 1.2.2.2 thorpej #include <net/route.h> 65 1.2.2.2 thorpej #include <net/bpf.h> 66 1.2.2.2 thorpej 67 1.2.2.2 thorpej #ifdef INET 68 1.2.2.2 thorpej #include <netinet/in.h> 69 1.2.2.2 thorpej #include <netinet/in_systm.h> 70 1.2.2.2 thorpej #include <netinet/in_var.h> 71 1.2.2.2 thorpej #include <netinet/ip.h> 72 1.2.2.2 thorpej #endif 73 1.2.2.2 thorpej 74 1.2.2.2 thorpej #ifdef IPX 75 1.2.2.2 thorpej #include <netipx/ipx.h> 76 1.2.2.2 thorpej #include <netipx/ipx_if.h> 77 1.2.2.2 thorpej #endif 78 1.2.2.2 thorpej 79 1.2.2.2 thorpej #ifdef INET6 80 1.2.2.2 thorpej #ifndef INET 81 1.2.2.2 thorpej #include <netinet/in.h> 82 1.2.2.2 thorpej #endif 83 1.2.2.2 thorpej #include <netinet6/in6_var.h> 84 1.2.2.2 thorpej #include <netinet6/ip6.h> 85 1.2.2.2 thorpej #endif 86 1.2.2.2 thorpej 87 1.2.2.2 thorpej #ifdef NS 88 1.2.2.2 thorpej #include <netns/ns.h> 89 1.2.2.2 thorpej #include <netns/ns_if.h> 90 1.2.2.2 thorpej #endif 91 1.2.2.2 thorpej 92 1.2.2.2 thorpej #ifdef ISO 93 1.2.2.2 thorpej #include <netiso/iso.h> 94 1.2.2.2 thorpej #include <netiso/iso_var.h> 95 1.2.2.2 thorpej #endif 96 1.2.2.2 thorpej 97 1.2.2.2 thorpej #ifdef NETATALK 98 1.2.2.2 thorpej #include <netinet/if_ether.h> 99 1.2.2.2 thorpej #include <netatalk/at.h> 100 1.2.2.2 thorpej #include <netatalk/at_var.h> 101 1.2.2.2 thorpej #endif NETATALK 102 1.2.2.2 thorpej 103 1.2.2.2 thorpej #include "bpfilter.h" 104 1.2.2.2 thorpej 105 1.2.2.2 thorpej #ifdef __FreeBSD__ 106 1.2.2.2 thorpej static int faithioctl __P((struct ifnet *, int, caddr_t)); 107 1.2.2.2 thorpej #else 108 1.2.2.2 thorpej static int faithioctl __P((struct ifnet *, u_long, caddr_t)); 109 1.2.2.2 thorpej #endif 110 1.2.2.2 thorpej int faithoutput __P((struct ifnet *, register struct mbuf *, struct sockaddr *, 111 1.2.2.2 thorpej register struct rtentry *)); 112 1.2.2.2 thorpej static void faithrtrequest __P((int, struct rtentry *, struct sockaddr *)); 113 1.2.2.2 thorpej 114 1.2.2.2 thorpej void faithattach __P((void *)); 115 1.2.2.2 thorpej #ifdef __FreeBSD__ 116 1.2.2.2 thorpej PSEUDO_SET(faithattach, if_faith); 117 1.2.2.2 thorpej #endif 118 1.2.2.2 thorpej 119 1.2.2.2 thorpej static struct ifnet faithif[NFAITH]; 120 1.2.2.2 thorpej 121 1.2.2.2 thorpej #define FAITHMTU 1500 122 1.2.2.2 thorpej 123 1.2.2.2 thorpej /* ARGSUSED */ 124 1.2.2.2 thorpej void 125 1.2.2.2 thorpej faithattach(faith) 126 1.2.2.2 thorpej void *faith; 127 1.2.2.2 thorpej { 128 1.2.2.2 thorpej register struct ifnet *ifp; 129 1.2.2.2 thorpej register int i; 130 1.2.2.2 thorpej 131 1.2.2.2 thorpej for (i = 0; i < NFAITH; i++) { 132 1.2.2.2 thorpej ifp = &faithif[i]; 133 1.2.2.2 thorpej bzero(ifp, sizeof(faithif[i])); 134 1.2.2.2 thorpej #ifdef __NetBSD__ 135 1.2.2.2 thorpej sprintf(ifp->if_xname, "faith%d", i); 136 1.2.2.2 thorpej #else 137 1.2.2.2 thorpej ifp->if_name = "faith"; 138 1.2.2.2 thorpej ifp->if_unit = i; 139 1.2.2.2 thorpej #endif 140 1.2.2.2 thorpej ifp->if_mtu = FAITHMTU; 141 1.2.2.2 thorpej /* Change to BROADCAST experimentaly to announce its prefix. */ 142 1.2.2.2 thorpej ifp->if_flags = /* IFF_LOOPBACK */ IFF_BROADCAST | IFF_MULTICAST; 143 1.2.2.2 thorpej ifp->if_ioctl = faithioctl; 144 1.2.2.2 thorpej ifp->if_output = faithoutput; 145 1.2.2.2 thorpej ifp->if_type = IFT_FAITH; 146 1.2.2.2 thorpej ifp->if_hdrlen = 0; 147 1.2.2.2 thorpej ifp->if_addrlen = 0; 148 1.2.2.2 thorpej if_attach(ifp); 149 1.2.2.2 thorpej #if NBPFILTER > 0 150 1.2.2.2 thorpej #ifdef __FreeBSD__ 151 1.2.2.2 thorpej bpfattach(ifp, DLT_NULL, sizeof(u_int)); 152 1.2.2.2 thorpej #else 153 1.2.2.2 thorpej bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int)); 154 1.2.2.2 thorpej #endif 155 1.2.2.2 thorpej #endif 156 1.2.2.2 thorpej } 157 1.2.2.2 thorpej } 158 1.2.2.2 thorpej 159 1.2.2.2 thorpej int 160 1.2.2.2 thorpej faithoutput(ifp, m, dst, rt) 161 1.2.2.2 thorpej struct ifnet *ifp; 162 1.2.2.2 thorpej register struct mbuf *m; 163 1.2.2.2 thorpej struct sockaddr *dst; 164 1.2.2.2 thorpej register struct rtentry *rt; 165 1.2.2.2 thorpej { 166 1.2.2.2 thorpej int s, isr; 167 1.2.2.2 thorpej register struct ifqueue *ifq = 0; 168 1.2.2.2 thorpej 169 1.2.2.2 thorpej if ((m->m_flags & M_PKTHDR) == 0) 170 1.2.2.2 thorpej panic("faithoutput no HDR"); 171 1.2.2.2 thorpej #if NBPFILTER > 0 172 1.2.2.2 thorpej /* BPF write needs to be handled specially */ 173 1.2.2.2 thorpej if (dst->sa_family == AF_UNSPEC) { 174 1.2.2.2 thorpej dst->sa_family = *(mtod(m, int *)); 175 1.2.2.2 thorpej m->m_len -= sizeof(int); 176 1.2.2.2 thorpej m->m_pkthdr.len -= sizeof(int); 177 1.2.2.2 thorpej m->m_data += sizeof(int); 178 1.2.2.2 thorpej } 179 1.2.2.2 thorpej 180 1.2.2.2 thorpej if (ifp->if_bpf) { 181 1.2.2.2 thorpej /* 182 1.2.2.2 thorpej * We need to prepend the address family as 183 1.2.2.2 thorpej * a four byte field. Cons up a faith header 184 1.2.2.2 thorpej * to pacify bpf. This is safe because bpf 185 1.2.2.2 thorpej * will only read from the mbuf (i.e., it won't 186 1.2.2.2 thorpej * try to free it or keep a pointer a to it). 187 1.2.2.2 thorpej */ 188 1.2.2.2 thorpej struct mbuf m0; 189 1.2.2.2 thorpej u_int af = dst->sa_family; 190 1.2.2.2 thorpej 191 1.2.2.2 thorpej m0.m_next = m; 192 1.2.2.2 thorpej m0.m_len = 4; 193 1.2.2.2 thorpej m0.m_data = (char *)⁡ 194 1.2.2.2 thorpej 195 1.2.2.2 thorpej #ifdef __FreeBSD__ 196 1.2.2.2 thorpej bpf_mtap(ifp, &m0); 197 1.2.2.2 thorpej #else 198 1.2.2.2 thorpej bpf_mtap(ifp->if_bpf, &m0); 199 1.2.2.2 thorpej #endif 200 1.2.2.2 thorpej } 201 1.2.2.2 thorpej #endif 202 1.2.2.2 thorpej 203 1.2.2.2 thorpej if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 204 1.2.2.2 thorpej m_freem(m); 205 1.2.2.2 thorpej return (rt->rt_flags & RTF_BLACKHOLE ? 0 : 206 1.2.2.2 thorpej rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH); 207 1.2.2.2 thorpej } 208 1.2.2.2 thorpej ifp->if_opackets++; 209 1.2.2.2 thorpej ifp->if_obytes += m->m_pkthdr.len; 210 1.2.2.2 thorpej switch (dst->sa_family) { 211 1.2.2.2 thorpej #ifdef INET6 212 1.2.2.2 thorpej case AF_INET6: 213 1.2.2.2 thorpej ifq = &ip6intrq; 214 1.2.2.2 thorpej isr = NETISR_IPV6; 215 1.2.2.2 thorpej break; 216 1.2.2.2 thorpej #endif 217 1.2.2.2 thorpej default: 218 1.2.2.2 thorpej m_freem(m); 219 1.2.2.2 thorpej return EAFNOSUPPORT; 220 1.2.2.2 thorpej } 221 1.2.2.2 thorpej 222 1.2.2.2 thorpej /* XXX do we need more sanity checks? */ 223 1.2.2.2 thorpej 224 1.2.2.2 thorpej m->m_pkthdr.rcvif = ifp; 225 1.2.2.2 thorpej s = splimp(); 226 1.2.2.2 thorpej if (IF_QFULL(ifq)) { 227 1.2.2.2 thorpej IF_DROP(ifq); 228 1.2.2.2 thorpej m_freem(m); 229 1.2.2.2 thorpej splx(s); 230 1.2.2.2 thorpej return (ENOBUFS); 231 1.2.2.2 thorpej } 232 1.2.2.2 thorpej IF_ENQUEUE(ifq, m); 233 1.2.2.2 thorpej schednetisr(isr); 234 1.2.2.2 thorpej ifp->if_ipackets++; 235 1.2.2.2 thorpej ifp->if_ibytes += m->m_pkthdr.len; 236 1.2.2.2 thorpej splx(s); 237 1.2.2.2 thorpej return (0); 238 1.2.2.2 thorpej } 239 1.2.2.2 thorpej 240 1.2.2.2 thorpej /* ARGSUSED */ 241 1.2.2.2 thorpej static void 242 1.2.2.2 thorpej faithrtrequest(cmd, rt, sa) 243 1.2.2.2 thorpej int cmd; 244 1.2.2.2 thorpej struct rtentry *rt; 245 1.2.2.2 thorpej struct sockaddr *sa; 246 1.2.2.2 thorpej { 247 1.2.2.2 thorpej if (rt) { 248 1.2.2.2 thorpej rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */ 249 1.2.2.2 thorpej /* 250 1.2.2.2 thorpej * For optimal performance, the send and receive buffers 251 1.2.2.2 thorpej * should be at least twice the MTU plus a little more for 252 1.2.2.2 thorpej * overhead. 253 1.2.2.2 thorpej */ 254 1.2.2.2 thorpej rt->rt_rmx.rmx_recvpipe = 255 1.2.2.2 thorpej rt->rt_rmx.rmx_sendpipe = 3 * FAITHMTU; 256 1.2.2.2 thorpej } 257 1.2.2.2 thorpej } 258 1.2.2.2 thorpej 259 1.2.2.2 thorpej /* 260 1.2.2.2 thorpej * Process an ioctl request. 261 1.2.2.2 thorpej */ 262 1.2.2.2 thorpej /* ARGSUSED */ 263 1.2.2.2 thorpej static int 264 1.2.2.2 thorpej faithioctl(ifp, cmd, data) 265 1.2.2.2 thorpej register struct ifnet *ifp; 266 1.2.2.2 thorpej #ifdef __FreeBSD__ 267 1.2.2.2 thorpej int cmd; 268 1.2.2.2 thorpej #else 269 1.2.2.2 thorpej u_long cmd; 270 1.2.2.2 thorpej #endif 271 1.2.2.2 thorpej caddr_t data; 272 1.2.2.2 thorpej { 273 1.2.2.2 thorpej register struct ifaddr *ifa; 274 1.2.2.2 thorpej register struct ifreq *ifr = (struct ifreq *)data; 275 1.2.2.2 thorpej register int error = 0; 276 1.2.2.2 thorpej 277 1.2.2.2 thorpej switch (cmd) { 278 1.2.2.2 thorpej 279 1.2.2.2 thorpej case SIOCSIFADDR: 280 1.2.2.2 thorpej ifp->if_flags |= IFF_UP | IFF_RUNNING; 281 1.2.2.2 thorpej ifa = (struct ifaddr *)data; 282 1.2.2.2 thorpej ifa->ifa_rtrequest = faithrtrequest; 283 1.2.2.2 thorpej /* 284 1.2.2.2 thorpej * Everything else is done at a higher level. 285 1.2.2.2 thorpej */ 286 1.2.2.2 thorpej break; 287 1.2.2.2 thorpej 288 1.2.2.2 thorpej case SIOCADDMULTI: 289 1.2.2.2 thorpej case SIOCDELMULTI: 290 1.2.2.2 thorpej if (ifr == 0) { 291 1.2.2.2 thorpej error = EAFNOSUPPORT; /* XXX */ 292 1.2.2.2 thorpej break; 293 1.2.2.2 thorpej } 294 1.2.2.2 thorpej switch (ifr->ifr_addr.sa_family) { 295 1.2.2.2 thorpej #ifdef INET6 296 1.2.2.2 thorpej case AF_INET6: 297 1.2.2.2 thorpej break; 298 1.2.2.2 thorpej #endif 299 1.2.2.2 thorpej 300 1.2.2.2 thorpej default: 301 1.2.2.2 thorpej error = EAFNOSUPPORT; 302 1.2.2.2 thorpej break; 303 1.2.2.2 thorpej } 304 1.2.2.2 thorpej break; 305 1.2.2.2 thorpej 306 1.2.2.2 thorpej #ifdef SIOCSIFMTU 307 1.2.2.2 thorpej case SIOCSIFMTU: 308 1.2.2.2 thorpej ifp->if_mtu = ifr->ifr_mtu; 309 1.2.2.2 thorpej break; 310 1.2.2.2 thorpej #endif 311 1.2.2.2 thorpej 312 1.2.2.2 thorpej case SIOCSIFFLAGS: 313 1.2.2.2 thorpej break; 314 1.2.2.2 thorpej 315 1.2.2.2 thorpej default: 316 1.2.2.2 thorpej error = EINVAL; 317 1.2.2.2 thorpej } 318 1.2.2.2 thorpej return (error); 319 1.2.2.2 thorpej } 320 1.2.2.2 thorpej #endif /* NFAITH > 0 */ 321
Indexes created Thu Oct 30 03:10:01 GMT 2025