1c398230bSWarner Losh /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 4df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1986, 1991, 1993 5df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 681d96ce8SMax Laier * Copyright (C) 2001 WIDE Project. All rights reserved. 7df8bae1dSRodney W. Grimes * 8df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 9df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 10df8bae1dSRodney W. Grimes * are met: 11df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 12df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 13df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 14df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 15df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 16fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 17df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 18df8bae1dSRodney W. Grimes * without specific prior written permission. 19df8bae1dSRodney W. Grimes * 20df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30df8bae1dSRodney W. Grimes * SUCH DAMAGE. 31df8bae1dSRodney W. Grimes * 322180b925SGarrett Wollman * @(#)in.c 8.4 (Berkeley) 1/9/95 33df8bae1dSRodney W. Grimes */ 34df8bae1dSRodney W. Grimes 354b421e2dSMike Silbersack #include <sys/cdefs.h> 364b421e2dSMike Silbersack __FBSDID("$FreeBSD$"); 374b421e2dSMike Silbersack 38*2f35e7d9SMike Karels #define IN_HISTORICAL_NETS /* include class masks */ 39*2f35e7d9SMike Karels 40df8bae1dSRodney W. Grimes #include <sys/param.h> 41c3322cb9SGleb Smirnoff #include <sys/eventhandler.h> 4226f9a767SRodney W. Grimes #include <sys/systm.h> 4351a53488SBruce Evans #include <sys/sockio.h> 44df8bae1dSRodney W. Grimes #include <sys/malloc.h> 45acd3428bSRobert Watson #include <sys/priv.h> 46df8bae1dSRodney W. Grimes #include <sys/socket.h> 475ce0eb7fSBjoern A. Zeeb #include <sys/jail.h> 48f6d24a78SPoul-Henning Kamp #include <sys/kernel.h> 49cc0a3c8cSAndrey V. Elsukov #include <sys/lock.h> 505ce0eb7fSBjoern A. Zeeb #include <sys/proc.h> 51f6d24a78SPoul-Henning Kamp #include <sys/sysctl.h> 52ebc90701SQing Li #include <sys/syslog.h> 53f7a39160SGleb Smirnoff #include <sys/sx.h> 54df8bae1dSRodney W. Grimes 55df8bae1dSRodney W. Grimes #include <net/if.h> 56df813b7eSQing Li #include <net/if_var.h> 57e162ea60SGeorge V. Neville-Neil #include <net/if_arp.h> 58ebc90701SQing Li #include <net/if_dl.h> 596e6b3f7cSQing Li #include <net/if_llatbl.h> 606a800098SYoshinobu Inoue #include <net/if_types.h> 61df8bae1dSRodney W. Grimes #include <net/route.h> 6281728a53SAlexander V. Chernikov #include <net/route/nhop.h> 6381728a53SAlexander V. Chernikov #include <net/route/route_ctl.h> 64ebc90701SQing Li #include <net/vnet.h> 65df8bae1dSRodney W. Grimes 6608b68b0eSGleb Smirnoff #include <netinet/if_ether.h> 67df8bae1dSRodney W. Grimes #include <netinet/in.h> 68936f4a42SAlexander V. Chernikov #include <netinet/in_fib.h> 69df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 70e43cc4aeSHajimu UMEMOTO #include <netinet/in_pcb.h> 7171498f30SBruce M Simpson #include <netinet/ip_var.h> 7208b68b0eSGleb Smirnoff #include <netinet/ip_carp.h> 73d10910e6SBruce M Simpson #include <netinet/igmp_var.h> 74eddfbb76SRobert Watson #include <netinet/udp.h> 75eddfbb76SRobert Watson #include <netinet/udp_var.h> 7655166637SPoul-Henning Kamp 7777b89ad8SGleb Smirnoff static int in_aifaddr_ioctl(u_long, caddr_t, struct ifnet *, struct thread *); 78338e227aSLuiz Otavio O Souza static int in_difaddr_ioctl(u_long, caddr_t, struct ifnet *, struct thread *); 796952c3e1SAndrey V. Elsukov static int in_gifaddr_ioctl(u_long, caddr_t, struct ifnet *, struct thread *); 806a800098SYoshinobu Inoue 814d77a549SAlfred Perlstein static void in_socktrim(struct sockaddr_in *); 82ec002feeSBruce M Simpson static void in_purgemaddrs(struct ifnet *); 83df8bae1dSRodney W. Grimes 84130aebbaSAlexander V. Chernikov static bool ia_need_loopback_route(const struct in_ifaddr *); 85130aebbaSAlexander V. Chernikov 865f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nosameprefix); 8708b68b0eSGleb Smirnoff #define V_nosameprefix VNET(nosameprefix) 886df8a710SGleb Smirnoff SYSCTL_INT(_net_inet_ip, OID_AUTO, no_same_prefix, CTLFLAG_VNET | CTLFLAG_RW, 8908b68b0eSGleb Smirnoff &VNET_NAME(nosameprefix), 0, 901ae95409SGleb Smirnoff "Refuse to create same prefixes on different interfaces"); 91477180fbSGarrett Wollman 92fd076593SMike Karels VNET_DEFINE_STATIC(bool, broadcast_lowest); 93fd076593SMike Karels #define V_broadcast_lowest VNET(broadcast_lowest) 94fd076593SMike Karels SYSCTL_BOOL(_net_inet_ip, OID_AUTO, broadcast_lowest, CTLFLAG_VNET | CTLFLAG_RW, 95fd076593SMike Karels &VNET_NAME(broadcast_lowest), 0, 96fd076593SMike Karels "Treat lowest address on a subnet (host 0) as broadcast"); 97fd076593SMike Karels 9882cea7e6SBjoern A. Zeeb VNET_DECLARE(struct inpcbinfo, ripcbinfo); 9982cea7e6SBjoern A. Zeeb #define V_ripcbinfo VNET(ripcbinfo) 10082cea7e6SBjoern A. Zeeb 101f7a39160SGleb Smirnoff static struct sx in_control_sx; 102f7a39160SGleb Smirnoff SX_SYSINIT(in_control_sx, &in_control_sx, "in_control"); 103f7a39160SGleb Smirnoff 104df8bae1dSRodney W. Grimes /* 105df8bae1dSRodney W. Grimes * Return 1 if an internet address is for a ``local'' host 106b365d954SGleb Smirnoff * (one to which we have a connection). 107df8bae1dSRodney W. Grimes */ 10826f9a767SRodney W. Grimes int 109f2565d68SRobert Watson in_localaddr(struct in_addr in) 110df8bae1dSRodney W. Grimes { 1113e85b721SEd Maste u_long i = ntohl(in.s_addr); 1123e85b721SEd Maste struct in_ifaddr *ia; 113df8bae1dSRodney W. Grimes 1142144431cSGleb Smirnoff NET_EPOCH_ASSERT(); 1152144431cSGleb Smirnoff 116d7c5a620SMatt Macy CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1172144431cSGleb Smirnoff if ((i & ia->ia_subnetmask) == ia->ia_subnet) 1182d9cfabaSRobert Watson return (1); 1192d9cfabaSRobert Watson } 1202144431cSGleb Smirnoff 121df8bae1dSRodney W. Grimes return (0); 122df8bae1dSRodney W. Grimes } 123df8bae1dSRodney W. Grimes 124df8bae1dSRodney W. Grimes /* 1252eccc90bSAndre Oppermann * Return 1 if an internet address is for the local host and configured 1262eccc90bSAndre Oppermann * on one of its interfaces. 1272eccc90bSAndre Oppermann */ 128c8ee75f2SGleb Smirnoff bool 129f2565d68SRobert Watson in_localip(struct in_addr in) 1302eccc90bSAndre Oppermann { 1312eccc90bSAndre Oppermann struct in_ifaddr *ia; 1322eccc90bSAndre Oppermann 133c8ee75f2SGleb Smirnoff NET_EPOCH_ASSERT(); 134c8ee75f2SGleb Smirnoff 135c8ee75f2SGleb Smirnoff CK_LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) 136c8ee75f2SGleb Smirnoff if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) 137c8ee75f2SGleb Smirnoff return (true); 138c8ee75f2SGleb Smirnoff 139c8ee75f2SGleb Smirnoff return (false); 1402eccc90bSAndre Oppermann } 1412eccc90bSAndre Oppermann 1422eccc90bSAndre Oppermann /* 1439c89392fSGleb Smirnoff * Like in_localip(), but FIB-aware. 1449c89392fSGleb Smirnoff */ 1459c89392fSGleb Smirnoff bool 1469c89392fSGleb Smirnoff in_localip_fib(struct in_addr in, uint16_t fib) 1479c89392fSGleb Smirnoff { 1489c89392fSGleb Smirnoff struct in_ifaddr *ia; 1499c89392fSGleb Smirnoff 1509c89392fSGleb Smirnoff NET_EPOCH_ASSERT(); 1519c89392fSGleb Smirnoff 1529c89392fSGleb Smirnoff CK_LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) 1539c89392fSGleb Smirnoff if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr && 1549c89392fSGleb Smirnoff ia->ia_ifa.ifa_ifp->if_fib == fib) 1559c89392fSGleb Smirnoff return (true); 1569c89392fSGleb Smirnoff 1579c89392fSGleb Smirnoff return (false); 1589c89392fSGleb Smirnoff } 1599c89392fSGleb Smirnoff 1609c89392fSGleb Smirnoff /* 16128ebe80cSGleb Smirnoff * Return 1 if an internet address is configured on an interface. 16228ebe80cSGleb Smirnoff */ 16328ebe80cSGleb Smirnoff int 16428ebe80cSGleb Smirnoff in_ifhasaddr(struct ifnet *ifp, struct in_addr in) 16528ebe80cSGleb Smirnoff { 16628ebe80cSGleb Smirnoff struct ifaddr *ifa; 16728ebe80cSGleb Smirnoff struct in_ifaddr *ia; 16828ebe80cSGleb Smirnoff 169b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 170b8a6e03fSGleb Smirnoff 171d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 17228ebe80cSGleb Smirnoff if (ifa->ifa_addr->sa_family != AF_INET) 17328ebe80cSGleb Smirnoff continue; 17428ebe80cSGleb Smirnoff ia = (struct in_ifaddr *)ifa; 175b8a6e03fSGleb Smirnoff if (ia->ia_addr.sin_addr.s_addr == in.s_addr) 17628ebe80cSGleb Smirnoff return (1); 17728ebe80cSGleb Smirnoff } 17828ebe80cSGleb Smirnoff 17928ebe80cSGleb Smirnoff return (0); 18028ebe80cSGleb Smirnoff } 18128ebe80cSGleb Smirnoff 18228ebe80cSGleb Smirnoff /* 183f7a39160SGleb Smirnoff * Return a reference to the interface address which is different to 184f7a39160SGleb Smirnoff * the supplied one but with same IP address value. 185f7a39160SGleb Smirnoff */ 186f7a39160SGleb Smirnoff static struct in_ifaddr * 1879fdbf7eeSAlexander V. Chernikov in_localip_more(struct in_ifaddr *original_ia) 188f7a39160SGleb Smirnoff { 189c8ee75f2SGleb Smirnoff struct epoch_tracker et; 1909fdbf7eeSAlexander V. Chernikov in_addr_t original_addr = IA_SIN(original_ia)->sin_addr.s_addr; 1919fdbf7eeSAlexander V. Chernikov uint32_t original_fib = original_ia->ia_ifa.ifa_ifp->if_fib; 1929fdbf7eeSAlexander V. Chernikov struct in_ifaddr *ia; 193f7a39160SGleb Smirnoff 194c8ee75f2SGleb Smirnoff NET_EPOCH_ENTER(et); 195c8ee75f2SGleb Smirnoff CK_LIST_FOREACH(ia, INADDR_HASH(original_addr), ia_hash) { 1969fdbf7eeSAlexander V. Chernikov in_addr_t addr = IA_SIN(ia)->sin_addr.s_addr; 1979fdbf7eeSAlexander V. Chernikov uint32_t fib = ia->ia_ifa.ifa_ifp->if_fib; 1989fdbf7eeSAlexander V. Chernikov if (!V_rt_add_addr_allfibs && (original_fib != fib)) 1999fdbf7eeSAlexander V. Chernikov continue; 2009fdbf7eeSAlexander V. Chernikov if ((original_ia != ia) && (original_addr == addr)) { 2019fdbf7eeSAlexander V. Chernikov ifa_ref(&ia->ia_ifa); 202c8ee75f2SGleb Smirnoff NET_EPOCH_EXIT(et); 2039fdbf7eeSAlexander V. Chernikov return (ia); 204f7a39160SGleb Smirnoff } 205f7a39160SGleb Smirnoff } 206c8ee75f2SGleb Smirnoff NET_EPOCH_EXIT(et); 207f7a39160SGleb Smirnoff 208f7a39160SGleb Smirnoff return (NULL); 209f7a39160SGleb Smirnoff } 210f7a39160SGleb Smirnoff 211f7a39160SGleb Smirnoff /* 2124b631fc8SAlexander V. Chernikov * Tries to find first IPv4 address in the provided fib. 2134b631fc8SAlexander V. Chernikov * Prefers non-loopback addresses and return loopback IFF 2144b631fc8SAlexander V. Chernikov * @loopback_ok is set. 2154b631fc8SAlexander V. Chernikov * 2164b631fc8SAlexander V. Chernikov * Returns ifa or NULL. 2174b631fc8SAlexander V. Chernikov */ 2184b631fc8SAlexander V. Chernikov struct in_ifaddr * 2194b631fc8SAlexander V. Chernikov in_findlocal(uint32_t fibnum, bool loopback_ok) 2204b631fc8SAlexander V. Chernikov { 2214b631fc8SAlexander V. Chernikov struct in_ifaddr *ia = NULL, *ia_lo = NULL; 2224b631fc8SAlexander V. Chernikov 2234b631fc8SAlexander V. Chernikov NET_EPOCH_ASSERT(); 2244b631fc8SAlexander V. Chernikov 2254b631fc8SAlexander V. Chernikov CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 2264b631fc8SAlexander V. Chernikov uint32_t ia_fib = ia->ia_ifa.ifa_ifp->if_fib; 2274b631fc8SAlexander V. Chernikov if (!V_rt_add_addr_allfibs && (fibnum != ia_fib)) 2284b631fc8SAlexander V. Chernikov continue; 2294b631fc8SAlexander V. Chernikov 2304b631fc8SAlexander V. Chernikov if (!IN_LOOPBACK(ntohl(IA_SIN(ia)->sin_addr.s_addr))) 2314b631fc8SAlexander V. Chernikov break; 2324b631fc8SAlexander V. Chernikov if (loopback_ok) 2334b631fc8SAlexander V. Chernikov ia_lo = ia; 2344b631fc8SAlexander V. Chernikov } 2354b631fc8SAlexander V. Chernikov 2364b631fc8SAlexander V. Chernikov if (ia == NULL) 2374b631fc8SAlexander V. Chernikov ia = ia_lo; 2384b631fc8SAlexander V. Chernikov 2394b631fc8SAlexander V. Chernikov return (ia); 2404b631fc8SAlexander V. Chernikov } 2414b631fc8SAlexander V. Chernikov 2424b631fc8SAlexander V. Chernikov /* 243df8bae1dSRodney W. Grimes * Determine whether an IP address is in a reserved set of addresses 244df8bae1dSRodney W. Grimes * that may not be forwarded, or whether datagrams to that destination 245df8bae1dSRodney W. Grimes * may be forwarded. 246df8bae1dSRodney W. Grimes */ 24726f9a767SRodney W. Grimes int 248f2565d68SRobert Watson in_canforward(struct in_addr in) 249df8bae1dSRodney W. Grimes { 2503e85b721SEd Maste u_long i = ntohl(in.s_addr); 251df8bae1dSRodney W. Grimes 2526c1c6ae5SRodney W. Grimes if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i) || 2536c1c6ae5SRodney W. Grimes IN_ZERONET(i) || IN_LOOPBACK(i)) 254df8bae1dSRodney W. Grimes return (0); 255df8bae1dSRodney W. Grimes return (1); 256df8bae1dSRodney W. Grimes } 257df8bae1dSRodney W. Grimes 258df8bae1dSRodney W. Grimes /* 259df8bae1dSRodney W. Grimes * Trim a mask in a sockaddr 260df8bae1dSRodney W. Grimes */ 2610312fbe9SPoul-Henning Kamp static void 262f2565d68SRobert Watson in_socktrim(struct sockaddr_in *ap) 263df8bae1dSRodney W. Grimes { 2643e85b721SEd Maste char *cplim = (char *) &ap->sin_addr; 2653e85b721SEd Maste char *cp = (char *) (&ap->sin_addr + 1); 266df8bae1dSRodney W. Grimes 267df8bae1dSRodney W. Grimes ap->sin_len = 0; 268df00058dSGarrett Wollman while (--cp >= cplim) 269df8bae1dSRodney W. Grimes if (*cp) { 270df8bae1dSRodney W. Grimes (ap)->sin_len = cp - (char *) (ap) + 1; 271df8bae1dSRodney W. Grimes break; 272df8bae1dSRodney W. Grimes } 273df8bae1dSRodney W. Grimes } 274df8bae1dSRodney W. Grimes 275df8bae1dSRodney W. Grimes /* 276df8bae1dSRodney W. Grimes * Generic internet control operations (ioctl's). 277df8bae1dSRodney W. Grimes */ 27826f9a767SRodney W. Grimes int 279f2565d68SRobert Watson in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 280f2565d68SRobert Watson struct thread *td) 281df8bae1dSRodney W. Grimes { 282f7a39160SGleb Smirnoff struct ifreq *ifr = (struct ifreq *)data; 283f7a39160SGleb Smirnoff struct sockaddr_in *addr = (struct sockaddr_in *)&ifr->ifr_addr; 284a68cc388SGleb Smirnoff struct epoch_tracker et; 285821b5cafSGleb Smirnoff struct ifaddr *ifa; 286f7a39160SGleb Smirnoff struct in_ifaddr *ia; 287f7a39160SGleb Smirnoff int error; 288f7a39160SGleb Smirnoff 289f7a39160SGleb Smirnoff if (ifp == NULL) 290f7a39160SGleb Smirnoff return (EADDRNOTAVAIL); 29171212473SGleb Smirnoff 29271212473SGleb Smirnoff /* 293f7a39160SGleb Smirnoff * Filter out 4 ioctls we implement directly. Forward the rest 294f7a39160SGleb Smirnoff * to specific functions and ifp->if_ioctl(). 295bbb3fb61SRobert Watson */ 2966a800098SYoshinobu Inoue switch (cmd) { 297bbb3fb61SRobert Watson case SIOCGIFADDR: 298bbb3fb61SRobert Watson case SIOCGIFBRDADDR: 299bbb3fb61SRobert Watson case SIOCGIFDSTADDR: 300bbb3fb61SRobert Watson case SIOCGIFNETMASK: 301f7a39160SGleb Smirnoff break; 3026952c3e1SAndrey V. Elsukov case SIOCGIFALIAS: 3036952c3e1SAndrey V. Elsukov sx_xlock(&in_control_sx); 3046952c3e1SAndrey V. Elsukov error = in_gifaddr_ioctl(cmd, data, ifp, td); 3056952c3e1SAndrey V. Elsukov sx_xunlock(&in_control_sx); 3066952c3e1SAndrey V. Elsukov return (error); 3076d00fd9cSGleb Smirnoff case SIOCDIFADDR: 308f7a39160SGleb Smirnoff sx_xlock(&in_control_sx); 309338e227aSLuiz Otavio O Souza error = in_difaddr_ioctl(cmd, data, ifp, td); 310f7a39160SGleb Smirnoff sx_xunlock(&in_control_sx); 311f7a39160SGleb Smirnoff return (error); 31277b89ad8SGleb Smirnoff case OSIOCAIFADDR: /* 9.x compat */ 3136d00fd9cSGleb Smirnoff case SIOCAIFADDR: 314f7a39160SGleb Smirnoff sx_xlock(&in_control_sx); 31577b89ad8SGleb Smirnoff error = in_aifaddr_ioctl(cmd, data, ifp, td); 316f7a39160SGleb Smirnoff sx_xunlock(&in_control_sx); 317f7a39160SGleb Smirnoff return (error); 318bbb3fb61SRobert Watson case SIOCSIFADDR: 319bbb3fb61SRobert Watson case SIOCSIFBRDADDR: 320bbb3fb61SRobert Watson case SIOCSIFDSTADDR: 321bbb3fb61SRobert Watson case SIOCSIFNETMASK: 32256cf9dc1SGleb Smirnoff /* We no longer support that old commands. */ 3236d00fd9cSGleb Smirnoff return (EINVAL); 324bbb3fb61SRobert Watson default: 325f7a39160SGleb Smirnoff if (ifp->if_ioctl == NULL) 326bbb3fb61SRobert Watson return (EOPNOTSUPP); 327bbb3fb61SRobert Watson return ((*ifp->if_ioctl)(ifp, cmd, data)); 3286a800098SYoshinobu Inoue } 3296a800098SYoshinobu Inoue 330821b5cafSGleb Smirnoff if (addr->sin_addr.s_addr != INADDR_ANY && 331821b5cafSGleb Smirnoff prison_check_ip4(td->td_ucred, &addr->sin_addr) != 0) 332821b5cafSGleb Smirnoff return (EADDRNOTAVAIL); 333821b5cafSGleb Smirnoff 334cf7b18f1SRobert Watson /* 335a7f77a39SXin LI * Find address for this interface, if it exists. If an 336a7f77a39SXin LI * address was specified, find that one instead of the 337a7f77a39SXin LI * first one on the interface, if possible. 338df8bae1dSRodney W. Grimes */ 339a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 340d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3419706c950SGleb Smirnoff if (ifa->ifa_addr->sa_family != AF_INET) 3429706c950SGleb Smirnoff continue; 343821b5cafSGleb Smirnoff ia = (struct in_ifaddr *)ifa; 344821b5cafSGleb Smirnoff if (ia->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr) 345df8bae1dSRodney W. Grimes break; 346ca925d9cSJonathan Lemon } 347a7f77a39SXin LI if (ifa == NULL) 348d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 349a7f77a39SXin LI if (ifa->ifa_addr->sa_family == AF_INET) { 350a7f77a39SXin LI ia = (struct in_ifaddr *)ifa; 351a7f77a39SXin LI if (prison_check_ip4(td->td_ucred, 352a7f77a39SXin LI &ia->ia_addr.sin_addr) == 0) 353a7f77a39SXin LI break; 354a7f77a39SXin LI } 355f7a39160SGleb Smirnoff 356821b5cafSGleb Smirnoff if (ifa == NULL) { 357a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 358f7a39160SGleb Smirnoff return (EADDRNOTAVAIL); 359ac0aa473SBill Fenner } 360df8bae1dSRodney W. Grimes 361588885f2SRobert Watson error = 0; 362df8bae1dSRodney W. Grimes switch (cmd) { 363f7a39160SGleb Smirnoff case SIOCGIFADDR: 364f7a39160SGleb Smirnoff *addr = ia->ia_addr; 365f7a39160SGleb Smirnoff break; 3668c0fec80SRobert Watson 367f7a39160SGleb Smirnoff case SIOCGIFBRDADDR: 368f7a39160SGleb Smirnoff if ((ifp->if_flags & IFF_BROADCAST) == 0) { 369f7a39160SGleb Smirnoff error = EINVAL; 370df8bae1dSRodney W. Grimes break; 371df8bae1dSRodney W. Grimes } 372f7a39160SGleb Smirnoff *addr = ia->ia_broadaddr; 373f7a39160SGleb Smirnoff break; 374f7a39160SGleb Smirnoff 375f7a39160SGleb Smirnoff case SIOCGIFDSTADDR: 376f7a39160SGleb Smirnoff if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 377f7a39160SGleb Smirnoff error = EINVAL; 378f7a39160SGleb Smirnoff break; 379f7a39160SGleb Smirnoff } 380f7a39160SGleb Smirnoff *addr = ia->ia_dstaddr; 381f7a39160SGleb Smirnoff break; 382f7a39160SGleb Smirnoff 383f7a39160SGleb Smirnoff case SIOCGIFNETMASK: 384f7a39160SGleb Smirnoff *addr = ia->ia_sockmask; 385f7a39160SGleb Smirnoff break; 386f7a39160SGleb Smirnoff } 387f7a39160SGleb Smirnoff 388a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 389f7a39160SGleb Smirnoff 390f7a39160SGleb Smirnoff return (error); 3911067217dSGarrett Wollman } 392f7a39160SGleb Smirnoff 393f7a39160SGleb Smirnoff static int 39477b89ad8SGleb Smirnoff in_aifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td) 395f7a39160SGleb Smirnoff { 396f7a39160SGleb Smirnoff const struct in_aliasreq *ifra = (struct in_aliasreq *)data; 397f7a39160SGleb Smirnoff const struct sockaddr_in *addr = &ifra->ifra_addr; 398f7a39160SGleb Smirnoff const struct sockaddr_in *broadaddr = &ifra->ifra_broadaddr; 399f7a39160SGleb Smirnoff const struct sockaddr_in *mask = &ifra->ifra_mask; 400f7a39160SGleb Smirnoff const struct sockaddr_in *dstaddr = &ifra->ifra_dstaddr; 40177b89ad8SGleb Smirnoff const int vhid = (cmd == SIOCAIFADDR) ? ifra->ifra_vhid : 0; 402a68cc388SGleb Smirnoff struct epoch_tracker et; 403f7a39160SGleb Smirnoff struct ifaddr *ifa; 404f7a39160SGleb Smirnoff struct in_ifaddr *ia; 405f7a39160SGleb Smirnoff bool iaIsFirst; 406f7a39160SGleb Smirnoff int error = 0; 407f7a39160SGleb Smirnoff 408f7a39160SGleb Smirnoff error = priv_check(td, PRIV_NET_ADDIFADDR); 409f7a39160SGleb Smirnoff if (error) 410f7a39160SGleb Smirnoff return (error); 411f7a39160SGleb Smirnoff 412f7a39160SGleb Smirnoff /* 413f7a39160SGleb Smirnoff * ifra_addr must be present and be of INET family. 414f7a39160SGleb Smirnoff * ifra_broadaddr/ifra_dstaddr and ifra_mask are optional. 415f7a39160SGleb Smirnoff */ 416f7a39160SGleb Smirnoff if (addr->sin_len != sizeof(struct sockaddr_in) || 417f7a39160SGleb Smirnoff addr->sin_family != AF_INET) 418f7a39160SGleb Smirnoff return (EINVAL); 419f7a39160SGleb Smirnoff if (broadaddr->sin_len != 0 && 420f7a39160SGleb Smirnoff (broadaddr->sin_len != sizeof(struct sockaddr_in) || 421f7a39160SGleb Smirnoff broadaddr->sin_family != AF_INET)) 422f7a39160SGleb Smirnoff return (EINVAL); 423f7a39160SGleb Smirnoff if (mask->sin_len != 0 && 424f7a39160SGleb Smirnoff (mask->sin_len != sizeof(struct sockaddr_in) || 425f7a39160SGleb Smirnoff mask->sin_family != AF_INET)) 426f7a39160SGleb Smirnoff return (EINVAL); 427f7a39160SGleb Smirnoff if ((ifp->if_flags & IFF_POINTOPOINT) && 428f7a39160SGleb Smirnoff (dstaddr->sin_len != sizeof(struct sockaddr_in) || 429f7a39160SGleb Smirnoff dstaddr->sin_addr.s_addr == INADDR_ANY)) 430f7a39160SGleb Smirnoff return (EDESTADDRREQ); 431620cf65cSArtem Khramov if (vhid != 0 && carp_attach_p == NULL) 432f7a39160SGleb Smirnoff return (EPROTONOSUPPORT); 433f7a39160SGleb Smirnoff 434f7a39160SGleb Smirnoff /* 435f7a39160SGleb Smirnoff * See whether address already exist. 436f7a39160SGleb Smirnoff */ 437f7a39160SGleb Smirnoff iaIsFirst = true; 438f7a39160SGleb Smirnoff ia = NULL; 439a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 440d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 4419706c950SGleb Smirnoff struct in_ifaddr *it; 442f7a39160SGleb Smirnoff 4439706c950SGleb Smirnoff if (ifa->ifa_addr->sa_family != AF_INET) 444f7a39160SGleb Smirnoff continue; 445f7a39160SGleb Smirnoff 4469706c950SGleb Smirnoff it = (struct in_ifaddr *)ifa; 447f7a39160SGleb Smirnoff if (it->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr && 448f7a39160SGleb Smirnoff prison_check_ip4(td->td_ucred, &addr->sin_addr) == 0) 449f7a39160SGleb Smirnoff ia = it; 4503f740d43SAndrey V. Elsukov else 4513f740d43SAndrey V. Elsukov iaIsFirst = false; 4521067217dSGarrett Wollman } 453a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 454f7a39160SGleb Smirnoff 455f7a39160SGleb Smirnoff if (ia != NULL) 456338e227aSLuiz Otavio O Souza (void )in_difaddr_ioctl(cmd, data, ifp, td); 457f7a39160SGleb Smirnoff 45846758960SGleb Smirnoff ifa = ifa_alloc(sizeof(struct in_ifaddr), M_WAITOK); 45946758960SGleb Smirnoff ia = (struct in_ifaddr *)ifa; 46059562606SGarrett Wollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 46159562606SGarrett Wollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 46259562606SGarrett Wollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 4632d9db0bcSEric van Gyzen callout_init_rw(&ia->ia_garp_timer, &ifp->if_addr_lock, 4642d9db0bcSEric van Gyzen CALLOUT_RETURNUNLOCKED); 46519fc74fbSJeffrey Hsu 466f7a39160SGleb Smirnoff ia->ia_ifp = ifp; 467f7a39160SGleb Smirnoff ia->ia_addr = *addr; 468f7a39160SGleb Smirnoff if (mask->sin_len != 0) { 469f7a39160SGleb Smirnoff ia->ia_sockmask = *mask; 470f7a39160SGleb Smirnoff ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 471f7a39160SGleb Smirnoff } else { 472*2f35e7d9SMike Karels in_addr_t i = ntohl(addr->sin_addr.s_addr); 473*2f35e7d9SMike Karels 474f7a39160SGleb Smirnoff /* 475*2f35e7d9SMike Karels * If netmask isn't supplied, use historical default. 47620d59403SMike Karels * This is deprecated for interfaces other than loopback 47720d59403SMike Karels * or point-to-point; warn in other cases. In the future 47820d59403SMike Karels * we should return an error rather than warning. 479f7a39160SGleb Smirnoff */ 48020d59403SMike Karels if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) 48120d59403SMike Karels printf("%s: set address: WARNING: network mask " 482*2f35e7d9SMike Karels "should be specified; using historical default\n", 48320d59403SMike Karels ifp->if_xname); 484*2f35e7d9SMike Karels if (IN_CLASSA(i)) 485*2f35e7d9SMike Karels ia->ia_subnetmask = IN_CLASSA_NET; 486*2f35e7d9SMike Karels else if (IN_CLASSB(i)) 487*2f35e7d9SMike Karels ia->ia_subnetmask = IN_CLASSB_NET; 488*2f35e7d9SMike Karels else 489*2f35e7d9SMike Karels ia->ia_subnetmask = IN_CLASSC_NET; 490f7a39160SGleb Smirnoff ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 491f7a39160SGleb Smirnoff } 492f7a39160SGleb Smirnoff ia->ia_subnet = ntohl(addr->sin_addr.s_addr) & ia->ia_subnetmask; 493f7a39160SGleb Smirnoff in_socktrim(&ia->ia_sockmask); 494f7a39160SGleb Smirnoff 495df8bae1dSRodney W. Grimes if (ifp->if_flags & IFF_BROADCAST) { 496f7a39160SGleb Smirnoff if (broadaddr->sin_len != 0) { 497f7a39160SGleb Smirnoff ia->ia_broadaddr = *broadaddr; 498f7a39160SGleb Smirnoff } else if (ia->ia_subnetmask == IN_RFC3021_MASK) { 499f7a39160SGleb Smirnoff ia->ia_broadaddr.sin_addr.s_addr = INADDR_BROADCAST; 500f7a39160SGleb Smirnoff ia->ia_broadaddr.sin_len = sizeof(struct sockaddr_in); 501f7a39160SGleb Smirnoff ia->ia_broadaddr.sin_family = AF_INET; 502f7a39160SGleb Smirnoff } else { 503f7a39160SGleb Smirnoff ia->ia_broadaddr.sin_addr.s_addr = 504f7a39160SGleb Smirnoff htonl(ia->ia_subnet | ~ia->ia_subnetmask); 505f7a39160SGleb Smirnoff ia->ia_broadaddr.sin_len = sizeof(struct sockaddr_in); 506df8bae1dSRodney W. Grimes ia->ia_broadaddr.sin_family = AF_INET; 507df8bae1dSRodney W. Grimes } 508f7a39160SGleb Smirnoff } 509f7a39160SGleb Smirnoff 510f7a39160SGleb Smirnoff if (ifp->if_flags & IFF_POINTOPOINT) 511f7a39160SGleb Smirnoff ia->ia_dstaddr = *dstaddr; 512f7a39160SGleb Smirnoff 5135af464bbSSteven Hartland if (vhid != 0) { 5145af464bbSSteven Hartland error = (*carp_attach_p)(&ia->ia_ifa, vhid); 5155af464bbSSteven Hartland if (error) 5165af464bbSSteven Hartland return (error); 5175af464bbSSteven Hartland } 5185af464bbSSteven Hartland 519a49b317cSAlexander V. Chernikov /* if_addrhead is already referenced by ifa_alloc() */ 520137f91e8SJohn Baldwin IF_ADDR_WLOCK(ifp); 521d7c5a620SMatt Macy CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 522137f91e8SJohn Baldwin IF_ADDR_WUNLOCK(ifp); 523f7a39160SGleb Smirnoff 5248c0fec80SRobert Watson ifa_ref(ifa); /* in_ifaddrhead */ 525c8ee75f2SGleb Smirnoff sx_assert(&in_control_sx, SA_XLOCKED); 526d7c5a620SMatt Macy CK_STAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 527c8ee75f2SGleb Smirnoff CK_LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), ia, 528c8ee75f2SGleb Smirnoff ia_hash); 529df8bae1dSRodney W. Grimes 530f7a39160SGleb Smirnoff /* 531f7a39160SGleb Smirnoff * Give the interface a chance to initialize 532f7a39160SGleb Smirnoff * if this is its first address, 533f7a39160SGleb Smirnoff * and to validate the address if necessary. 534f7a39160SGleb Smirnoff */ 535d34165f7SSteven Hartland if (ifp->if_ioctl != NULL) { 536f7a39160SGleb Smirnoff error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 537f7a39160SGleb Smirnoff if (error) 5385af464bbSSteven Hartland goto fail1; 539d34165f7SSteven Hartland } 540f7a39160SGleb Smirnoff 541f7a39160SGleb Smirnoff /* 542f7a39160SGleb Smirnoff * Add route for the network. 543f7a39160SGleb Smirnoff */ 544f7a39160SGleb Smirnoff if (vhid == 0) { 545130aebbaSAlexander V. Chernikov error = in_addprefix(ia); 546f7a39160SGleb Smirnoff if (error) 5475af464bbSSteven Hartland goto fail1; 548df8bae1dSRodney W. Grimes } 549df8bae1dSRodney W. Grimes 550588885f2SRobert Watson /* 551f7a39160SGleb Smirnoff * Add a loopback route to self. 552588885f2SRobert Watson */ 553130aebbaSAlexander V. Chernikov if (vhid == 0 && ia_need_loopback_route(ia)) { 554f7a39160SGleb Smirnoff struct in_ifaddr *eia; 555df8bae1dSRodney W. Grimes 556f7a39160SGleb Smirnoff eia = in_localip_more(ia); 557f7a39160SGleb Smirnoff 558f7a39160SGleb Smirnoff if (eia == NULL) { 559f7a39160SGleb Smirnoff error = ifa_add_loopback_route((struct ifaddr *)ia, 560f7a39160SGleb Smirnoff (struct sockaddr *)&ia->ia_addr); 561f7a39160SGleb Smirnoff if (error) 5625af464bbSSteven Hartland goto fail2; 563f7a39160SGleb Smirnoff } else 564f7a39160SGleb Smirnoff ifa_free(&eia->ia_ifa); 565588885f2SRobert Watson } 566df8bae1dSRodney W. Grimes 567f7a39160SGleb Smirnoff if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST)) { 568f7a39160SGleb Smirnoff struct in_addr allhosts_addr; 569f7a39160SGleb Smirnoff struct in_ifinfo *ii; 570df8bae1dSRodney W. Grimes 571c75aa354SBruce M Simpson ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 572f7a39160SGleb Smirnoff allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 573df8bae1dSRodney W. Grimes 574f7a39160SGleb Smirnoff error = in_joingroup(ifp, &allhosts_addr, NULL, 575f7a39160SGleb Smirnoff &ii->ii_allhosts); 576f7a39160SGleb Smirnoff } 577f7a39160SGleb Smirnoff 57864d63b1eSAndrey V. Elsukov /* 57964d63b1eSAndrey V. Elsukov * Note: we don't need extra reference for ifa, since we called 58064d63b1eSAndrey V. Elsukov * with sx lock held, and ifaddr can not be deleted in concurrent 58164d63b1eSAndrey V. Elsukov * thread. 58264d63b1eSAndrey V. Elsukov */ 58364d63b1eSAndrey V. Elsukov EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, ifa, IFADDR_EVENT_ADD); 584f7a39160SGleb Smirnoff 585f7a39160SGleb Smirnoff return (error); 586f7a39160SGleb Smirnoff 5875af464bbSSteven Hartland fail2: 588f7a39160SGleb Smirnoff if (vhid == 0) 589f7a39160SGleb Smirnoff (void )in_scrubprefix(ia, LLE_STATIC); 590f7a39160SGleb Smirnoff 5915af464bbSSteven Hartland fail1: 592f7a39160SGleb Smirnoff if (ia->ia_ifa.ifa_carp) 593338e227aSLuiz Otavio O Souza (*carp_detach_p)(&ia->ia_ifa, false); 594f7a39160SGleb Smirnoff 595f7a39160SGleb Smirnoff IF_ADDR_WLOCK(ifp); 596d7c5a620SMatt Macy CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 597f7a39160SGleb Smirnoff IF_ADDR_WUNLOCK(ifp); 598a49b317cSAlexander V. Chernikov ifa_free(&ia->ia_ifa); /* if_addrhead */ 599f7a39160SGleb Smirnoff 600c8ee75f2SGleb Smirnoff sx_assert(&in_control_sx, SA_XLOCKED); 601d7c5a620SMatt Macy CK_STAILQ_REMOVE(&V_in_ifaddrhead, ia, in_ifaddr, ia_link); 602c8ee75f2SGleb Smirnoff CK_LIST_REMOVE(ia, ia_hash); 603a49b317cSAlexander V. Chernikov ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 604f7a39160SGleb Smirnoff 605f7a39160SGleb Smirnoff return (error); 606f7a39160SGleb Smirnoff } 607f7a39160SGleb Smirnoff 608f7a39160SGleb Smirnoff static int 609338e227aSLuiz Otavio O Souza in_difaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td) 610f7a39160SGleb Smirnoff { 611f7a39160SGleb Smirnoff const struct ifreq *ifr = (struct ifreq *)data; 6126224cd89SNathan Whitehorn const struct sockaddr_in *addr = (const struct sockaddr_in *) 6136224cd89SNathan Whitehorn &ifr->ifr_addr; 614f7a39160SGleb Smirnoff struct ifaddr *ifa; 615f7a39160SGleb Smirnoff struct in_ifaddr *ia; 616f7a39160SGleb Smirnoff bool deleteAny, iaIsLast; 617f7a39160SGleb Smirnoff int error; 618f7a39160SGleb Smirnoff 619f7a39160SGleb Smirnoff if (td != NULL) { 620f7a39160SGleb Smirnoff error = priv_check(td, PRIV_NET_DELIFADDR); 621f7a39160SGleb Smirnoff if (error) 622f7a39160SGleb Smirnoff return (error); 623f7a39160SGleb Smirnoff } 624f7a39160SGleb Smirnoff 625f7a39160SGleb Smirnoff if (addr->sin_len != sizeof(struct sockaddr_in) || 626f7a39160SGleb Smirnoff addr->sin_family != AF_INET) 627f7a39160SGleb Smirnoff deleteAny = true; 628f7a39160SGleb Smirnoff else 629f7a39160SGleb Smirnoff deleteAny = false; 630f7a39160SGleb Smirnoff 631f7a39160SGleb Smirnoff iaIsLast = true; 632f7a39160SGleb Smirnoff ia = NULL; 633f7a39160SGleb Smirnoff IF_ADDR_WLOCK(ifp); 634d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 6359706c950SGleb Smirnoff struct in_ifaddr *it; 636f7a39160SGleb Smirnoff 6379706c950SGleb Smirnoff if (ifa->ifa_addr->sa_family != AF_INET) 638f7a39160SGleb Smirnoff continue; 639f7a39160SGleb Smirnoff 6409706c950SGleb Smirnoff it = (struct in_ifaddr *)ifa; 641f7a39160SGleb Smirnoff if (deleteAny && ia == NULL && (td == NULL || 642f7a39160SGleb Smirnoff prison_check_ip4(td->td_ucred, &it->ia_addr.sin_addr) == 0)) 643f7a39160SGleb Smirnoff ia = it; 644f7a39160SGleb Smirnoff 645f7a39160SGleb Smirnoff if (it->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr && 646f7a39160SGleb Smirnoff (td == NULL || prison_check_ip4(td->td_ucred, 647f7a39160SGleb Smirnoff &addr->sin_addr) == 0)) 648f7a39160SGleb Smirnoff ia = it; 649f7a39160SGleb Smirnoff 650f7a39160SGleb Smirnoff if (it != ia) 651f7a39160SGleb Smirnoff iaIsLast = false; 652f7a39160SGleb Smirnoff } 653f7a39160SGleb Smirnoff 654f7a39160SGleb Smirnoff if (ia == NULL) { 655f7a39160SGleb Smirnoff IF_ADDR_WUNLOCK(ifp); 656f7a39160SGleb Smirnoff return (EADDRNOTAVAIL); 657f7a39160SGleb Smirnoff } 658f7a39160SGleb Smirnoff 659d7c5a620SMatt Macy CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 660f7a39160SGleb Smirnoff IF_ADDR_WUNLOCK(ifp); 661f7a39160SGleb Smirnoff ifa_free(&ia->ia_ifa); /* if_addrhead */ 662f7a39160SGleb Smirnoff 663c8ee75f2SGleb Smirnoff sx_assert(&in_control_sx, SA_XLOCKED); 664d7c5a620SMatt Macy CK_STAILQ_REMOVE(&V_in_ifaddrhead, ia, in_ifaddr, ia_link); 665c8ee75f2SGleb Smirnoff CK_LIST_REMOVE(ia, ia_hash); 666f7a39160SGleb Smirnoff 667089cdfadSRuslan Ermilov /* 668237bf7f7SGleb Smirnoff * in_scrubprefix() kills the interface route. 669089cdfadSRuslan Ermilov */ 670237bf7f7SGleb Smirnoff in_scrubprefix(ia, LLE_STATIC); 671588885f2SRobert Watson 672c655b7c4SDavid Greenman /* 673089cdfadSRuslan Ermilov * in_ifadown gets rid of all the rest of 674089cdfadSRuslan Ermilov * the routes. This is not quite the right 675089cdfadSRuslan Ermilov * thing to do, but at least if we are running 676089cdfadSRuslan Ermilov * a routing process they will come back. 677089cdfadSRuslan Ermilov */ 67891854268SRuslan Ermilov in_ifadown(&ia->ia_ifa, 1); 6790f02fdacSBrian Somers 68008b68b0eSGleb Smirnoff if (ia->ia_ifa.ifa_carp) 68159b2022fSLuiz Otavio O Souza (*carp_detach_p)(&ia->ia_ifa, cmd == SIOCAIFADDR); 68208b68b0eSGleb Smirnoff 683f7e083afSBruce M Simpson /* 684f7e083afSBruce M Simpson * If this is the last IPv4 address configured on this 685f7e083afSBruce M Simpson * interface, leave the all-hosts group. 686d10910e6SBruce M Simpson * No state-change report need be transmitted. 687f7e083afSBruce M Simpson */ 688f7a39160SGleb Smirnoff if (iaIsLast && (ifp->if_flags & IFF_MULTICAST)) { 689f7a39160SGleb Smirnoff struct in_ifinfo *ii; 690f7a39160SGleb Smirnoff 691c75aa354SBruce M Simpson ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 692d10910e6SBruce M Simpson if (ii->ii_allhosts) { 693f3e1324bSStephen Hurd (void)in_leavegroup(ii->ii_allhosts, NULL); 694d10910e6SBruce M Simpson ii->ii_allhosts = NULL; 695d10910e6SBruce M Simpson } 696f7a39160SGleb Smirnoff } 6976d00fd9cSGleb Smirnoff 6982d9db0bcSEric van Gyzen IF_ADDR_WLOCK(ifp); 6992d9db0bcSEric van Gyzen if (callout_stop(&ia->ia_garp_timer) == 1) { 7002d9db0bcSEric van Gyzen ifa_free(&ia->ia_ifa); 7012d9db0bcSEric van Gyzen } 7022d9db0bcSEric van Gyzen IF_ADDR_WUNLOCK(ifp); 7032d9db0bcSEric van Gyzen 70464d63b1eSAndrey V. Elsukov EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 70564d63b1eSAndrey V. Elsukov IFADDR_EVENT_DEL); 706a49b317cSAlexander V. Chernikov ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 707f7a39160SGleb Smirnoff 708f7a39160SGleb Smirnoff return (0); 709df8bae1dSRodney W. Grimes } 710df8bae1dSRodney W. Grimes 7116952c3e1SAndrey V. Elsukov static int 7126952c3e1SAndrey V. Elsukov in_gifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td) 7136952c3e1SAndrey V. Elsukov { 7146952c3e1SAndrey V. Elsukov struct in_aliasreq *ifra = (struct in_aliasreq *)data; 7156952c3e1SAndrey V. Elsukov const struct sockaddr_in *addr = &ifra->ifra_addr; 7166952c3e1SAndrey V. Elsukov struct epoch_tracker et; 7176952c3e1SAndrey V. Elsukov struct ifaddr *ifa; 7186952c3e1SAndrey V. Elsukov struct in_ifaddr *ia; 7196952c3e1SAndrey V. Elsukov 7206952c3e1SAndrey V. Elsukov /* 7216952c3e1SAndrey V. Elsukov * ifra_addr must be present and be of INET family. 7226952c3e1SAndrey V. Elsukov */ 7236952c3e1SAndrey V. Elsukov if (addr->sin_len != sizeof(struct sockaddr_in) || 7246952c3e1SAndrey V. Elsukov addr->sin_family != AF_INET) 7256952c3e1SAndrey V. Elsukov return (EINVAL); 7266952c3e1SAndrey V. Elsukov 7276952c3e1SAndrey V. Elsukov /* 7286952c3e1SAndrey V. Elsukov * See whether address exist. 7296952c3e1SAndrey V. Elsukov */ 7306952c3e1SAndrey V. Elsukov ia = NULL; 7316952c3e1SAndrey V. Elsukov NET_EPOCH_ENTER(et); 7326952c3e1SAndrey V. Elsukov CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 7336952c3e1SAndrey V. Elsukov struct in_ifaddr *it; 7346952c3e1SAndrey V. Elsukov 7356952c3e1SAndrey V. Elsukov if (ifa->ifa_addr->sa_family != AF_INET) 7366952c3e1SAndrey V. Elsukov continue; 7376952c3e1SAndrey V. Elsukov 7386952c3e1SAndrey V. Elsukov it = (struct in_ifaddr *)ifa; 7396952c3e1SAndrey V. Elsukov if (it->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr && 7406952c3e1SAndrey V. Elsukov prison_check_ip4(td->td_ucred, &addr->sin_addr) == 0) { 7416952c3e1SAndrey V. Elsukov ia = it; 7426952c3e1SAndrey V. Elsukov break; 7436952c3e1SAndrey V. Elsukov } 7446952c3e1SAndrey V. Elsukov } 7456952c3e1SAndrey V. Elsukov if (ia == NULL) { 7466952c3e1SAndrey V. Elsukov NET_EPOCH_EXIT(et); 7476952c3e1SAndrey V. Elsukov return (EADDRNOTAVAIL); 7486952c3e1SAndrey V. Elsukov } 7496952c3e1SAndrey V. Elsukov 7506952c3e1SAndrey V. Elsukov ifra->ifra_mask = ia->ia_sockmask; 7516952c3e1SAndrey V. Elsukov if ((ifp->if_flags & IFF_POINTOPOINT) && 7526952c3e1SAndrey V. Elsukov ia->ia_dstaddr.sin_family == AF_INET) 7536952c3e1SAndrey V. Elsukov ifra->ifra_dstaddr = ia->ia_dstaddr; 7546952c3e1SAndrey V. Elsukov else if ((ifp->if_flags & IFF_BROADCAST) && 7556952c3e1SAndrey V. Elsukov ia->ia_broadaddr.sin_family == AF_INET) 7566952c3e1SAndrey V. Elsukov ifra->ifra_broadaddr = ia->ia_broadaddr; 7576952c3e1SAndrey V. Elsukov else 7586952c3e1SAndrey V. Elsukov memset(&ifra->ifra_broadaddr, 0, 7596952c3e1SAndrey V. Elsukov sizeof(ifra->ifra_broadaddr)); 7606952c3e1SAndrey V. Elsukov 7616952c3e1SAndrey V. Elsukov NET_EPOCH_EXIT(et); 7626952c3e1SAndrey V. Elsukov return (0); 7636952c3e1SAndrey V. Elsukov } 7646952c3e1SAndrey V. Elsukov 76581728a53SAlexander V. Chernikov static int 76681728a53SAlexander V. Chernikov in_match_ifaddr(const struct rtentry *rt, const struct nhop_object *nh, void *arg) 76781728a53SAlexander V. Chernikov { 76881728a53SAlexander V. Chernikov 76981728a53SAlexander V. Chernikov if (nh->nh_ifa == (struct ifaddr *)arg) 77081728a53SAlexander V. Chernikov return (1); 77181728a53SAlexander V. Chernikov 77281728a53SAlexander V. Chernikov return (0); 77381728a53SAlexander V. Chernikov } 77481728a53SAlexander V. Chernikov 77581728a53SAlexander V. Chernikov static int 77681728a53SAlexander V. Chernikov in_handle_prefix_route(uint32_t fibnum, int cmd, 777130aebbaSAlexander V. Chernikov struct sockaddr_in *dst, struct sockaddr_in *netmask, struct ifaddr *ifa, 778130aebbaSAlexander V. Chernikov struct ifnet *ifp) 77981728a53SAlexander V. Chernikov { 78081728a53SAlexander V. Chernikov 78181728a53SAlexander V. Chernikov NET_EPOCH_ASSERT(); 78281728a53SAlexander V. Chernikov 78381728a53SAlexander V. Chernikov /* Prepare gateway */ 78481728a53SAlexander V. Chernikov struct sockaddr_dl_short sdl = { 78581728a53SAlexander V. Chernikov .sdl_family = AF_LINK, 78681728a53SAlexander V. Chernikov .sdl_len = sizeof(struct sockaddr_dl_short), 78781728a53SAlexander V. Chernikov .sdl_type = ifa->ifa_ifp->if_type, 78881728a53SAlexander V. Chernikov .sdl_index = ifa->ifa_ifp->if_index, 78981728a53SAlexander V. Chernikov }; 79081728a53SAlexander V. Chernikov 79181728a53SAlexander V. Chernikov struct rt_addrinfo info = { 79281728a53SAlexander V. Chernikov .rti_ifa = ifa, 793130aebbaSAlexander V. Chernikov .rti_ifp = ifp, 79481728a53SAlexander V. Chernikov .rti_flags = RTF_PINNED | ((netmask != NULL) ? 0 : RTF_HOST), 79581728a53SAlexander V. Chernikov .rti_info = { 79681728a53SAlexander V. Chernikov [RTAX_DST] = (struct sockaddr *)dst, 79781728a53SAlexander V. Chernikov [RTAX_NETMASK] = (struct sockaddr *)netmask, 79881728a53SAlexander V. Chernikov [RTAX_GATEWAY] = (struct sockaddr *)&sdl, 79981728a53SAlexander V. Chernikov }, 80081728a53SAlexander V. Chernikov /* Ensure we delete the prefix IFF prefix ifa matches */ 80181728a53SAlexander V. Chernikov .rti_filter = in_match_ifaddr, 80281728a53SAlexander V. Chernikov .rti_filterdata = ifa, 80381728a53SAlexander V. Chernikov }; 80481728a53SAlexander V. Chernikov 80581728a53SAlexander V. Chernikov return (rib_handle_ifaddr_info(fibnum, cmd, &info)); 80681728a53SAlexander V. Chernikov } 80781728a53SAlexander V. Chernikov 80881728a53SAlexander V. Chernikov /* 809130aebbaSAlexander V. Chernikov * Routing table interaction with interface addresses. 810130aebbaSAlexander V. Chernikov * 811130aebbaSAlexander V. Chernikov * In general, two types of routes needs to be installed: 812130aebbaSAlexander V. Chernikov * a) "interface" or "prefix" route, telling user that the addresses 813130aebbaSAlexander V. Chernikov * behind the ifa prefix are reached directly. 814130aebbaSAlexander V. Chernikov * b) "loopback" route installed for the ifa address, telling user that 815130aebbaSAlexander V. Chernikov * the address belongs to local system. 816130aebbaSAlexander V. Chernikov * 817130aebbaSAlexander V. Chernikov * Handling for (a) and (b) differs in multi-fib aspects, hence they 818130aebbaSAlexander V. Chernikov * are implemented in different functions below. 819130aebbaSAlexander V. Chernikov * 820130aebbaSAlexander V. Chernikov * The cases above may intersect - /32 interface aliases results in 821130aebbaSAlexander V. Chernikov * the same prefix produced by (a) and (b). This blurs the definition 822130aebbaSAlexander V. Chernikov * of the "loopback" route and complicate interactions. The interaction 823130aebbaSAlexander V. Chernikov * table is defined below. The case numbers are used in the multiple 824130aebbaSAlexander V. Chernikov * functions below to refer to the particular test case. 825130aebbaSAlexander V. Chernikov * 82681728a53SAlexander V. Chernikov * There can be multiple options: 827130aebbaSAlexander V. Chernikov * 1) Adding address with prefix on non-p2p/non-loopback interface. 828130aebbaSAlexander V. Chernikov * Example: 192.0.2.1/24. Action: 829130aebbaSAlexander V. Chernikov * * add "prefix" route towards 192.0.2.0/24 via @ia interface, 830130aebbaSAlexander V. Chernikov * using @ia as an address source. 831130aebbaSAlexander V. Chernikov * * add "loopback" route towards 192.0.2.1 via V_loif, saving 832130aebbaSAlexander V. Chernikov * @ia ifp in the gateway and using @ia as an address source. 833130aebbaSAlexander V. Chernikov * 834130aebbaSAlexander V. Chernikov * 2) Adding address with /32 mask to non-p2p/non-loopback interface. 835130aebbaSAlexander V. Chernikov * Example: 192.0.2.2/32. Action: 836130aebbaSAlexander V. Chernikov * * add "prefix" host route via V_loif, using @ia as an address source. 837130aebbaSAlexander V. Chernikov * 83881728a53SAlexander V. Chernikov * 3) Adding address with or without prefix to p2p interface. 839130aebbaSAlexander V. Chernikov * Example: 10.0.0.1/24->10.0.0.2. Action: 840130aebbaSAlexander V. Chernikov * * add "prefix" host route towards 10.0.0.2 via this interface, using @ia 841130aebbaSAlexander V. Chernikov * as an address source. Note: no sense in installing full /24 as the interface 842130aebbaSAlexander V. Chernikov * is point-to-point. 843130aebbaSAlexander V. Chernikov * * add "loopback" route towards 10.0.9.1 via V_loif, saving 844130aebbaSAlexander V. Chernikov * @ia ifp in the gateway and using @ia as an address source. 845130aebbaSAlexander V. Chernikov * 84681728a53SAlexander V. Chernikov * 4) Adding address with or without prefix to loopback interface. 847130aebbaSAlexander V. Chernikov * Example: 192.0.2.1/24. Action: 848130aebbaSAlexander V. Chernikov * * add "prefix" host route via @ia interface, using @ia as an address source. 849130aebbaSAlexander V. Chernikov * Note: Skip installing /24 prefix as it would introduce TTL loop 850130aebbaSAlexander V. Chernikov * for the traffic destined to these addresses. 851130aebbaSAlexander V. Chernikov */ 852130aebbaSAlexander V. Chernikov 853130aebbaSAlexander V. Chernikov /* 854130aebbaSAlexander V. Chernikov * Checks if @ia needs to install loopback route to @ia address via 855130aebbaSAlexander V. Chernikov * ifa_maintain_loopback_route(). 856130aebbaSAlexander V. Chernikov * 857130aebbaSAlexander V. Chernikov * Return true on success. 858130aebbaSAlexander V. Chernikov */ 859130aebbaSAlexander V. Chernikov static bool 860130aebbaSAlexander V. Chernikov ia_need_loopback_route(const struct in_ifaddr *ia) 861130aebbaSAlexander V. Chernikov { 862130aebbaSAlexander V. Chernikov struct ifnet *ifp = ia->ia_ifp; 863130aebbaSAlexander V. Chernikov 864130aebbaSAlexander V. Chernikov /* Case 4: Skip loopback interfaces */ 865130aebbaSAlexander V. Chernikov if ((ifp->if_flags & IFF_LOOPBACK) || 866130aebbaSAlexander V. Chernikov (ia->ia_addr.sin_addr.s_addr == INADDR_ANY)) 867130aebbaSAlexander V. Chernikov return (false); 868130aebbaSAlexander V. Chernikov 869130aebbaSAlexander V. Chernikov /* Clash avoidance: Skip p2p interfaces with both addresses are equal */ 870130aebbaSAlexander V. Chernikov if ((ifp->if_flags & IFF_POINTOPOINT) && 871130aebbaSAlexander V. Chernikov ia->ia_dstaddr.sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 872130aebbaSAlexander V. Chernikov return (false); 873130aebbaSAlexander V. Chernikov 874130aebbaSAlexander V. Chernikov /* Case 2: skip /32 prefixes */ 875130aebbaSAlexander V. Chernikov if (!(ifp->if_flags & IFF_POINTOPOINT) && 876130aebbaSAlexander V. Chernikov (ia->ia_sockmask.sin_addr.s_addr == INADDR_BROADCAST)) 877130aebbaSAlexander V. Chernikov return (false); 878130aebbaSAlexander V. Chernikov 879130aebbaSAlexander V. Chernikov return (true); 880130aebbaSAlexander V. Chernikov } 881130aebbaSAlexander V. Chernikov 882130aebbaSAlexander V. Chernikov /* 883130aebbaSAlexander V. Chernikov * Calculate "prefix" route corresponding to @ia. 884130aebbaSAlexander V. Chernikov */ 885130aebbaSAlexander V. Chernikov static void 886130aebbaSAlexander V. Chernikov ia_getrtprefix(const struct in_ifaddr *ia, struct in_addr *prefix, struct in_addr *mask) 887130aebbaSAlexander V. Chernikov { 888130aebbaSAlexander V. Chernikov 889130aebbaSAlexander V. Chernikov if (ia->ia_ifp->if_flags & IFF_POINTOPOINT) { 890130aebbaSAlexander V. Chernikov /* Case 3: return host route for dstaddr */ 891130aebbaSAlexander V. Chernikov *prefix = ia->ia_dstaddr.sin_addr; 892130aebbaSAlexander V. Chernikov mask->s_addr = INADDR_BROADCAST; 893130aebbaSAlexander V. Chernikov } else if (ia->ia_ifp->if_flags & IFF_LOOPBACK) { 894130aebbaSAlexander V. Chernikov /* Case 4: return host route for ifaddr */ 895130aebbaSAlexander V. Chernikov *prefix = ia->ia_addr.sin_addr; 896130aebbaSAlexander V. Chernikov mask->s_addr = INADDR_BROADCAST; 897130aebbaSAlexander V. Chernikov } else { 898130aebbaSAlexander V. Chernikov /* Cases 1,2: return actual ia prefix */ 899130aebbaSAlexander V. Chernikov *prefix = ia->ia_addr.sin_addr; 900130aebbaSAlexander V. Chernikov *mask = ia->ia_sockmask.sin_addr; 901130aebbaSAlexander V. Chernikov prefix->s_addr &= mask->s_addr; 902130aebbaSAlexander V. Chernikov } 903130aebbaSAlexander V. Chernikov } 904130aebbaSAlexander V. Chernikov 905130aebbaSAlexander V. Chernikov /* 906130aebbaSAlexander V. Chernikov * Adds or delete interface "prefix" route corresponding to @ifa. 907130aebbaSAlexander V. Chernikov * Returns 0 on success or errno. 90881728a53SAlexander V. Chernikov */ 90981728a53SAlexander V. Chernikov int 91081728a53SAlexander V. Chernikov in_handle_ifaddr_route(int cmd, struct in_ifaddr *ia) 91181728a53SAlexander V. Chernikov { 91281728a53SAlexander V. Chernikov struct ifaddr *ifa = &ia->ia_ifa; 91381728a53SAlexander V. Chernikov struct in_addr daddr, maddr; 91481728a53SAlexander V. Chernikov struct sockaddr_in *pmask; 91581728a53SAlexander V. Chernikov struct epoch_tracker et; 91681728a53SAlexander V. Chernikov int error; 91781728a53SAlexander V. Chernikov 918130aebbaSAlexander V. Chernikov ia_getrtprefix(ia, &daddr, &maddr); 91981728a53SAlexander V. Chernikov 92081728a53SAlexander V. Chernikov struct sockaddr_in mask = { 92181728a53SAlexander V. Chernikov .sin_family = AF_INET, 92281728a53SAlexander V. Chernikov .sin_len = sizeof(struct sockaddr_in), 92381728a53SAlexander V. Chernikov .sin_addr = maddr, 92481728a53SAlexander V. Chernikov }; 92581728a53SAlexander V. Chernikov 926130aebbaSAlexander V. Chernikov pmask = (maddr.s_addr != INADDR_BROADCAST) ? &mask : NULL; 92781728a53SAlexander V. Chernikov 92881728a53SAlexander V. Chernikov struct sockaddr_in dst = { 92981728a53SAlexander V. Chernikov .sin_family = AF_INET, 93081728a53SAlexander V. Chernikov .sin_len = sizeof(struct sockaddr_in), 93181728a53SAlexander V. Chernikov .sin_addr.s_addr = daddr.s_addr & maddr.s_addr, 93281728a53SAlexander V. Chernikov }; 93381728a53SAlexander V. Chernikov 934130aebbaSAlexander V. Chernikov struct ifnet *ifp = ia->ia_ifp; 935130aebbaSAlexander V. Chernikov 936130aebbaSAlexander V. Chernikov if ((maddr.s_addr == INADDR_BROADCAST) && 937130aebbaSAlexander V. Chernikov (!(ia->ia_ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)))) { 938130aebbaSAlexander V. Chernikov /* Case 2: host route on broadcast interface */ 939130aebbaSAlexander V. Chernikov ifp = V_loif; 940130aebbaSAlexander V. Chernikov } 941130aebbaSAlexander V. Chernikov 94281728a53SAlexander V. Chernikov uint32_t fibnum = ifa->ifa_ifp->if_fib; 94381728a53SAlexander V. Chernikov NET_EPOCH_ENTER(et); 944130aebbaSAlexander V. Chernikov error = in_handle_prefix_route(fibnum, cmd, &dst, pmask, ifa, ifp); 94581728a53SAlexander V. Chernikov NET_EPOCH_EXIT(et); 94681728a53SAlexander V. Chernikov 94781728a53SAlexander V. Chernikov return (error); 94881728a53SAlexander V. Chernikov } 94981728a53SAlexander V. Chernikov 950ccbb9c35SQing Li /* 951d68cf57bSAlexander V. Chernikov * Check if we have a route for the given prefix already. 95248321abeSMax Laier */ 953d68cf57bSAlexander V. Chernikov static bool 954130aebbaSAlexander V. Chernikov in_hasrtprefix(struct in_ifaddr *target) 95548321abeSMax Laier { 9562144431cSGleb Smirnoff struct epoch_tracker et; 95748321abeSMax Laier struct in_ifaddr *ia; 958bfb26eecSGleb Smirnoff struct in_addr prefix, mask, p, m; 959d68cf57bSAlexander V. Chernikov bool result = false; 96048321abeSMax Laier 961130aebbaSAlexander V. Chernikov ia_getrtprefix(target, &prefix, &mask); 96248321abeSMax Laier 9630cfee0c2SAlan Somers /* Look for an existing address with the same prefix, mask, and fib */ 9642144431cSGleb Smirnoff NET_EPOCH_ENTER(et); 965d7c5a620SMatt Macy CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 966130aebbaSAlexander V. Chernikov ia_getrtprefix(ia, &p, &m); 967bfb26eecSGleb Smirnoff 968bfb26eecSGleb Smirnoff if (prefix.s_addr != p.s_addr || 969bfb26eecSGleb Smirnoff mask.s_addr != m.s_addr) 970bfb26eecSGleb Smirnoff continue; 971130aebbaSAlexander V. Chernikov 9720cfee0c2SAlan Somers if (target->ia_ifp->if_fib != ia->ia_ifp->if_fib) 9730cfee0c2SAlan Somers continue; 97448321abeSMax Laier 97548321abeSMax Laier /* 97648321abeSMax Laier * If we got a matching prefix route inserted by other 97748321abeSMax Laier * interface address, we are done here. 97848321abeSMax Laier */ 9791ae95409SGleb Smirnoff if (ia->ia_flags & IFA_ROUTE) { 980d68cf57bSAlexander V. Chernikov result = true; 981d68cf57bSAlexander V. Chernikov break; 982d68cf57bSAlexander V. Chernikov } 983d68cf57bSAlexander V. Chernikov } 9842144431cSGleb Smirnoff NET_EPOCH_EXIT(et); 9850cfee0c2SAlan Somers 986d68cf57bSAlexander V. Chernikov return (result); 987d68cf57bSAlexander V. Chernikov } 988d68cf57bSAlexander V. Chernikov 989d68cf57bSAlexander V. Chernikov int 990130aebbaSAlexander V. Chernikov in_addprefix(struct in_ifaddr *target) 991d68cf57bSAlexander V. Chernikov { 992d68cf57bSAlexander V. Chernikov int error; 993d68cf57bSAlexander V. Chernikov 994130aebbaSAlexander V. Chernikov if (in_hasrtprefix(target)) { 995d68cf57bSAlexander V. Chernikov if (V_nosameprefix) 996d68cf57bSAlexander V. Chernikov return (EEXIST); 997d68cf57bSAlexander V. Chernikov else { 998d68cf57bSAlexander V. Chernikov rt_addrmsg(RTM_ADD, &target->ia_ifa, 999d68cf57bSAlexander V. Chernikov target->ia_ifp->if_fib); 10001ae95409SGleb Smirnoff return (0); 10011ae95409SGleb Smirnoff } 100248321abeSMax Laier } 100348321abeSMax Laier 100448321abeSMax Laier /* 100548321abeSMax Laier * No-one seem to have this prefix route, so we try to insert it. 100648321abeSMax Laier */ 100781728a53SAlexander V. Chernikov rt_addrmsg(RTM_ADD, &target->ia_ifa, target->ia_ifp->if_fib); 100881728a53SAlexander V. Chernikov error = in_handle_ifaddr_route(RTM_ADD, target); 100948321abeSMax Laier if (!error) 101048321abeSMax Laier target->ia_flags |= IFA_ROUTE; 1011460473a0SBjoern A. Zeeb return (error); 101248321abeSMax Laier } 101348321abeSMax Laier 101448321abeSMax Laier /* 10153e7a2321SAlexander V. Chernikov * Removes either all lle entries for given @ia, or lle 10163e7a2321SAlexander V. Chernikov * corresponding to @ia address. 10173e7a2321SAlexander V. Chernikov */ 10183e7a2321SAlexander V. Chernikov static void 10193e7a2321SAlexander V. Chernikov in_scrubprefixlle(struct in_ifaddr *ia, int all, u_int flags) 10203e7a2321SAlexander V. Chernikov { 10213e7a2321SAlexander V. Chernikov struct sockaddr_in addr, mask; 10223e7a2321SAlexander V. Chernikov struct sockaddr *saddr, *smask; 10233e7a2321SAlexander V. Chernikov struct ifnet *ifp; 10243e7a2321SAlexander V. Chernikov 10253e7a2321SAlexander V. Chernikov saddr = (struct sockaddr *)&addr; 10263e7a2321SAlexander V. Chernikov bzero(&addr, sizeof(addr)); 10273e7a2321SAlexander V. Chernikov addr.sin_len = sizeof(addr); 10283e7a2321SAlexander V. Chernikov addr.sin_family = AF_INET; 10293e7a2321SAlexander V. Chernikov smask = (struct sockaddr *)&mask; 10303e7a2321SAlexander V. Chernikov bzero(&mask, sizeof(mask)); 10313e7a2321SAlexander V. Chernikov mask.sin_len = sizeof(mask); 10323e7a2321SAlexander V. Chernikov mask.sin_family = AF_INET; 10333e7a2321SAlexander V. Chernikov mask.sin_addr.s_addr = ia->ia_subnetmask; 10343e7a2321SAlexander V. Chernikov ifp = ia->ia_ifp; 10353e7a2321SAlexander V. Chernikov 103626a60575SAlexander V. Chernikov if (all) { 103726a60575SAlexander V. Chernikov /* 103826a60575SAlexander V. Chernikov * Remove all L2 entries matching given prefix. 103926a60575SAlexander V. Chernikov * Convert address to host representation to avoid 104026a60575SAlexander V. Chernikov * doing this on every callback. ia_subnetmask is already 104126a60575SAlexander V. Chernikov * stored in host representation. 104226a60575SAlexander V. Chernikov */ 104326a60575SAlexander V. Chernikov addr.sin_addr.s_addr = ntohl(ia->ia_addr.sin_addr.s_addr); 10443e7a2321SAlexander V. Chernikov lltable_prefix_free(AF_INET, saddr, smask, flags); 104526a60575SAlexander V. Chernikov } else { 104626a60575SAlexander V. Chernikov /* Remove interface address only */ 104726a60575SAlexander V. Chernikov addr.sin_addr.s_addr = ia->ia_addr.sin_addr.s_addr; 10483e7a2321SAlexander V. Chernikov lltable_delete_addr(LLTABLE(ifp), LLE_IFADDR, saddr); 10493e7a2321SAlexander V. Chernikov } 105026a60575SAlexander V. Chernikov } 10513e7a2321SAlexander V. Chernikov 10523e7a2321SAlexander V. Chernikov /* 105348321abeSMax Laier * If there is no other address in the system that can serve a route to the 105448321abeSMax Laier * same prefix, remove the route. Hand over the route to the new address 105548321abeSMax Laier * otherwise. 105648321abeSMax Laier */ 105708b68b0eSGleb Smirnoff int 10585b84dc78SQing Li in_scrubprefix(struct in_ifaddr *target, u_int flags) 105948321abeSMax Laier { 10602144431cSGleb Smirnoff struct epoch_tracker et; 106148321abeSMax Laier struct in_ifaddr *ia; 106255174c34SGleb Smirnoff struct in_addr prefix, mask, p, m; 10637278b62aSAlan Somers int error = 0; 106448321abeSMax Laier 1065df813b7eSQing Li /* 1066df813b7eSQing Li * Remove the loopback route to the interface address. 1067df813b7eSQing Li */ 1068130aebbaSAlexander V. Chernikov if (ia_need_loopback_route(target) && (flags & LLE_STATIC)) { 1069f7a39160SGleb Smirnoff struct in_ifaddr *eia; 1070c7ab6602SQing Li 1071f7a39160SGleb Smirnoff eia = in_localip_more(target); 1072f7a39160SGleb Smirnoff 1073f7a39160SGleb Smirnoff if (eia != NULL) { 1074f7a39160SGleb Smirnoff error = ifa_switch_loopback_route((struct ifaddr *)eia, 107559c180c3SAlexander V. Chernikov (struct sockaddr *)&target->ia_addr); 1076f7a39160SGleb Smirnoff ifa_free(&eia->ia_ifa); 1077f7a39160SGleb Smirnoff } else { 10789bb7d0f4SQing Li error = ifa_del_loopback_route((struct ifaddr *)target, 10799bb7d0f4SQing Li (struct sockaddr *)&target->ia_addr); 10805b84dc78SQing Li } 1081ebc90701SQing Li } 1082ebc90701SQing Li 1083130aebbaSAlexander V. Chernikov ia_getrtprefix(target, &prefix, &mask); 108448321abeSMax Laier 1085ccbb9c35SQing Li if ((target->ia_flags & IFA_ROUTE) == 0) { 1086d68cf57bSAlexander V. Chernikov rt_addrmsg(RTM_DELETE, &target->ia_ifa, target->ia_ifp->if_fib); 108726a60575SAlexander V. Chernikov 108826a60575SAlexander V. Chernikov /* 108926a60575SAlexander V. Chernikov * Removing address from !IFF_UP interface or 109026a60575SAlexander V. Chernikov * prefix which exists on other interface (along with route). 109126a60575SAlexander V. Chernikov * No entries should exist here except target addr. 109226a60575SAlexander V. Chernikov * Given that, delete this entry only. 109326a60575SAlexander V. Chernikov */ 109426a60575SAlexander V. Chernikov in_scrubprefixlle(target, 0, flags); 1095ccbb9c35SQing Li return (0); 1096ccbb9c35SQing Li } 1097ccbb9c35SQing Li 10982144431cSGleb Smirnoff NET_EPOCH_ENTER(et); 1099d7c5a620SMatt Macy CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1100130aebbaSAlexander V. Chernikov ia_getrtprefix(ia, &p, &m); 110155174c34SGleb Smirnoff 110255174c34SGleb Smirnoff if (prefix.s_addr != p.s_addr || 110355174c34SGleb Smirnoff mask.s_addr != m.s_addr) 110455174c34SGleb Smirnoff continue; 110548321abeSMax Laier 110655174c34SGleb Smirnoff if ((ia->ia_ifp->if_flags & IFF_UP) == 0) 110748321abeSMax Laier continue; 110848321abeSMax Laier 110948321abeSMax Laier /* 111048321abeSMax Laier * If we got a matching prefix address, move IFA_ROUTE and 111148321abeSMax Laier * the route itself to it. Make sure that routing daemons 111248321abeSMax Laier * get a heads-up. 111348321abeSMax Laier */ 111408b68b0eSGleb Smirnoff if ((ia->ia_flags & IFA_ROUTE) == 0) { 111579d51435SSergey Kandaurov ifa_ref(&ia->ia_ifa); 11162144431cSGleb Smirnoff NET_EPOCH_EXIT(et); 111781728a53SAlexander V. Chernikov error = in_handle_ifaddr_route(RTM_DELETE, target); 111892322284SQing Li if (error == 0) 111948321abeSMax Laier target->ia_flags &= ~IFA_ROUTE; 112092322284SQing Li else 112192322284SQing Li log(LOG_INFO, "in_scrubprefix: err=%d, old prefix delete failed\n", 112292322284SQing Li error); 11233e7a2321SAlexander V. Chernikov /* Scrub all entries IFF interface is different */ 11243e7a2321SAlexander V. Chernikov in_scrubprefixlle(target, target->ia_ifp != ia->ia_ifp, 11253e7a2321SAlexander V. Chernikov flags); 112681728a53SAlexander V. Chernikov error = in_handle_ifaddr_route(RTM_ADD, ia); 112748321abeSMax Laier if (error == 0) 112848321abeSMax Laier ia->ia_flags |= IFA_ROUTE; 112992322284SQing Li else 113092322284SQing Li log(LOG_INFO, "in_scrubprefix: err=%d, new prefix add failed\n", 113192322284SQing Li error); 113279d51435SSergey Kandaurov ifa_free(&ia->ia_ifa); 1133460473a0SBjoern A. Zeeb return (error); 113448321abeSMax Laier } 113548321abeSMax Laier } 11362144431cSGleb Smirnoff NET_EPOCH_EXIT(et); 113748321abeSMax Laier 113848321abeSMax Laier /* 1139c9d763bfSQing Li * remove all L2 entries on the given prefix 1140c9d763bfSQing Li */ 11413e7a2321SAlexander V. Chernikov in_scrubprefixlle(target, 1, flags); 1142c9d763bfSQing Li 1143c9d763bfSQing Li /* 114448321abeSMax Laier * As no-one seem to have this prefix, we can remove the route. 114548321abeSMax Laier */ 114681728a53SAlexander V. Chernikov rt_addrmsg(RTM_DELETE, &target->ia_ifa, target->ia_ifp->if_fib); 114781728a53SAlexander V. Chernikov error = in_handle_ifaddr_route(RTM_DELETE, target); 114892322284SQing Li if (error == 0) 114948321abeSMax Laier target->ia_flags &= ~IFA_ROUTE; 115092322284SQing Li else 115192322284SQing Li log(LOG_INFO, "in_scrubprefix: err=%d, prefix delete failed\n", error); 115292322284SQing Li return (error); 115348321abeSMax Laier } 115448321abeSMax Laier 115589856f7eSBjoern A. Zeeb void 115689856f7eSBjoern A. Zeeb in_ifscrub_all(void) 115789856f7eSBjoern A. Zeeb { 115889856f7eSBjoern A. Zeeb struct ifnet *ifp; 115989856f7eSBjoern A. Zeeb struct ifaddr *ifa, *nifa; 116089856f7eSBjoern A. Zeeb struct ifaliasreq ifr; 116189856f7eSBjoern A. Zeeb 116289856f7eSBjoern A. Zeeb IFNET_RLOCK(); 11634f6c66ccSMatt Macy CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 116489856f7eSBjoern A. Zeeb /* Cannot lock here - lock recursion. */ 1165a68cc388SGleb Smirnoff /* NET_EPOCH_ENTER(et); */ 1166d7c5a620SMatt Macy CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 116789856f7eSBjoern A. Zeeb if (ifa->ifa_addr->sa_family != AF_INET) 116889856f7eSBjoern A. Zeeb continue; 116989856f7eSBjoern A. Zeeb 117089856f7eSBjoern A. Zeeb /* 117189856f7eSBjoern A. Zeeb * This is ugly but the only way for legacy IP to 117289856f7eSBjoern A. Zeeb * cleanly remove addresses and everything attached. 117389856f7eSBjoern A. Zeeb */ 117489856f7eSBjoern A. Zeeb bzero(&ifr, sizeof(ifr)); 117589856f7eSBjoern A. Zeeb ifr.ifra_addr = *ifa->ifa_addr; 117689856f7eSBjoern A. Zeeb if (ifa->ifa_dstaddr) 117789856f7eSBjoern A. Zeeb ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 117889856f7eSBjoern A. Zeeb (void)in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, 117989856f7eSBjoern A. Zeeb ifp, NULL); 118089856f7eSBjoern A. Zeeb } 1181a68cc388SGleb Smirnoff /* NET_EPOCH_EXIT(et); */ 118289856f7eSBjoern A. Zeeb in_purgemaddrs(ifp); 118389856f7eSBjoern A. Zeeb igmp_domifdetach(ifp); 118489856f7eSBjoern A. Zeeb } 118589856f7eSBjoern A. Zeeb IFNET_RUNLOCK(); 118689856f7eSBjoern A. Zeeb } 118789856f7eSBjoern A. Zeeb 118890cc51a1SRyan Stone int 118990cc51a1SRyan Stone in_ifaddr_broadcast(struct in_addr in, struct in_ifaddr *ia) 119090cc51a1SRyan Stone { 119190cc51a1SRyan Stone 119290cc51a1SRyan Stone return ((in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 119390cc51a1SRyan Stone /* 1194fd076593SMike Karels * Optionally check for old-style (host 0) broadcast, but 119590cc51a1SRyan Stone * taking into account that RFC 3021 obsoletes it. 119690cc51a1SRyan Stone */ 1197fd076593SMike Karels (V_broadcast_lowest && ia->ia_subnetmask != IN_RFC3021_MASK && 119890cc51a1SRyan Stone ntohl(in.s_addr) == ia->ia_subnet)) && 119990cc51a1SRyan Stone /* 120090cc51a1SRyan Stone * Check for an all one subnetmask. These 120190cc51a1SRyan Stone * only exist when an interface gets a secondary 120290cc51a1SRyan Stone * address. 120390cc51a1SRyan Stone */ 120490cc51a1SRyan Stone ia->ia_subnetmask != (u_long)0xffffffff); 120590cc51a1SRyan Stone } 120690cc51a1SRyan Stone 1207df8bae1dSRodney W. Grimes /* 1208df8bae1dSRodney W. Grimes * Return 1 if the address might be a local broadcast address. 1209df8bae1dSRodney W. Grimes */ 121026f9a767SRodney W. Grimes int 1211f2565d68SRobert Watson in_broadcast(struct in_addr in, struct ifnet *ifp) 1212df8bae1dSRodney W. Grimes { 12133e85b721SEd Maste struct ifaddr *ifa; 121411f2a7cdSRyan Stone int found; 1215df8bae1dSRodney W. Grimes 1216b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 1217b8a6e03fSGleb Smirnoff 1218df8bae1dSRodney W. Grimes if (in.s_addr == INADDR_BROADCAST || 1219df8bae1dSRodney W. Grimes in.s_addr == INADDR_ANY) 1220460473a0SBjoern A. Zeeb return (1); 1221df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 1222460473a0SBjoern A. Zeeb return (0); 122311f2a7cdSRyan Stone found = 0; 1224df8bae1dSRodney W. Grimes /* 1225df8bae1dSRodney W. Grimes * Look through the list of addresses for a match 1226df8bae1dSRodney W. Grimes * with a broadcast address. 1227df8bae1dSRodney W. Grimes */ 1228d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1229df8bae1dSRodney W. Grimes if (ifa->ifa_addr->sa_family == AF_INET && 123011f2a7cdSRyan Stone in_ifaddr_broadcast(in, (struct in_ifaddr *)ifa)) { 123111f2a7cdSRyan Stone found = 1; 123211f2a7cdSRyan Stone break; 123311f2a7cdSRyan Stone } 123411f2a7cdSRyan Stone return (found); 1235df8bae1dSRodney W. Grimes } 1236ec002feeSBruce M Simpson 1237df8bae1dSRodney W. Grimes /* 1238b1c53bc9SRobert Watson * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1239b1c53bc9SRobert Watson */ 1240b1c53bc9SRobert Watson void 1241f2565d68SRobert Watson in_ifdetach(struct ifnet *ifp) 1242b1c53bc9SRobert Watson { 1243f3e1324bSStephen Hurd IN_MULTI_LOCK(); 1244603724d3SBjoern A. Zeeb in_pcbpurgeif0(&V_ripcbinfo, ifp); 1245603724d3SBjoern A. Zeeb in_pcbpurgeif0(&V_udbinfo, ifp); 1246e06e816fSKevin Lo in_pcbpurgeif0(&V_ulitecbinfo, ifp); 1247ec002feeSBruce M Simpson in_purgemaddrs(ifp); 1248f3e1324bSStephen Hurd IN_MULTI_UNLOCK(); 12493689652cSHans Petter Selasky 12503689652cSHans Petter Selasky /* 12513689652cSHans Petter Selasky * Make sure all multicast deletions invoking if_ioctl() are 12523689652cSHans Petter Selasky * completed before returning. Else we risk accessing a freed 12533689652cSHans Petter Selasky * ifnet structure pointer. 12543689652cSHans Petter Selasky */ 12553689652cSHans Petter Selasky inm_release_wait(NULL); 1256b1c53bc9SRobert Watson } 12576e6b3f7cSQing Li 1258d10910e6SBruce M Simpson /* 1259d10910e6SBruce M Simpson * Delete all IPv4 multicast address records, and associated link-layer 1260d10910e6SBruce M Simpson * multicast address records, associated with ifp. 1261d10910e6SBruce M Simpson * XXX It looks like domifdetach runs AFTER the link layer cleanup. 126256663a40SBruce M Simpson * XXX This should not race with ifma_protospec being set during 126356663a40SBruce M Simpson * a new allocation, if it does, we have bigger problems. 1264d10910e6SBruce M Simpson */ 1265d10910e6SBruce M Simpson static void 1266d10910e6SBruce M Simpson in_purgemaddrs(struct ifnet *ifp) 1267d10910e6SBruce M Simpson { 1268f3e1324bSStephen Hurd struct in_multi_head purgeinms; 1269f3e1324bSStephen Hurd struct in_multi *inm; 1270b6f6f880SMatt Macy struct ifmultiaddr *ifma, *next; 1271d10910e6SBruce M Simpson 1272f3e1324bSStephen Hurd SLIST_INIT(&purgeinms); 1273f3e1324bSStephen Hurd IN_MULTI_LIST_LOCK(); 1274d10910e6SBruce M Simpson 1275d10910e6SBruce M Simpson /* 1276d10910e6SBruce M Simpson * Extract list of in_multi associated with the detaching ifp 1277d10910e6SBruce M Simpson * which the PF_INET layer is about to release. 1278d10910e6SBruce M Simpson * We need to do this as IF_ADDR_LOCK() may be re-acquired 1279d10910e6SBruce M Simpson * by code further down. 1280d10910e6SBruce M Simpson */ 1281b6f6f880SMatt Macy IF_ADDR_WLOCK(ifp); 1282b6f6f880SMatt Macy restart: 1283d7c5a620SMatt Macy CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) { 128456663a40SBruce M Simpson if (ifma->ifma_addr->sa_family != AF_INET || 128556663a40SBruce M Simpson ifma->ifma_protospec == NULL) 1286d10910e6SBruce M Simpson continue; 1287d10910e6SBruce M Simpson inm = (struct in_multi *)ifma->ifma_protospec; 1288f3e1324bSStephen Hurd inm_rele_locked(&purgeinms, inm); 1289b6f6f880SMatt Macy if (__predict_false(ifma_restart)) { 1290b6f6f880SMatt Macy ifma_restart = true; 1291b6f6f880SMatt Macy goto restart; 1292d10910e6SBruce M Simpson } 1293b6f6f880SMatt Macy } 1294b6f6f880SMatt Macy IF_ADDR_WUNLOCK(ifp); 1295d10910e6SBruce M Simpson 1296f3e1324bSStephen Hurd inm_release_list_deferred(&purgeinms); 1297d10910e6SBruce M Simpson igmp_ifdetach(ifp); 1298f3e1324bSStephen Hurd IN_MULTI_LIST_UNLOCK(); 1299d10910e6SBruce M Simpson } 1300d10910e6SBruce M Simpson 13016e6b3f7cSQing Li struct in_llentry { 13026e6b3f7cSQing Li struct llentry base; 13036e6b3f7cSQing Li }; 13046e6b3f7cSQing Li 130511cdad98SAlexander V. Chernikov #define IN_LLTBL_DEFAULT_HSIZE 32 130611cdad98SAlexander V. Chernikov #define IN_LLTBL_HASH(k, h) \ 130711cdad98SAlexander V. Chernikov (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 130811cdad98SAlexander V. Chernikov 1309a93cda78SKip Macy /* 131011cdad98SAlexander V. Chernikov * Do actual deallocation of @lle. 13112769d062SConrad Meyer */ 13122769d062SConrad Meyer static void 13134f6c66ccSMatt Macy in_lltable_destroy_lle_unlocked(epoch_context_t ctx) 13142769d062SConrad Meyer { 13154f6c66ccSMatt Macy struct llentry *lle; 13162769d062SConrad Meyer 13174f6c66ccSMatt Macy lle = __containerof(ctx, struct llentry, lle_epoch_ctx); 13182769d062SConrad Meyer LLE_LOCK_DESTROY(lle); 13192769d062SConrad Meyer LLE_REQ_DESTROY(lle); 13202769d062SConrad Meyer free(lle, M_LLTABLE); 13212769d062SConrad Meyer } 13222769d062SConrad Meyer 13232769d062SConrad Meyer /* 132411cdad98SAlexander V. Chernikov * Called by LLE_FREE_LOCKED when number of references 132511cdad98SAlexander V. Chernikov * drops to zero. 1326a93cda78SKip Macy */ 1327a93cda78SKip Macy static void 132811cdad98SAlexander V. Chernikov in_lltable_destroy_lle(struct llentry *lle) 1329a93cda78SKip Macy { 133011cdad98SAlexander V. Chernikov 1331a93cda78SKip Macy LLE_WUNLOCK(lle); 13322a4bd982SGleb Smirnoff NET_EPOCH_CALL(in_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 1333a93cda78SKip Macy } 1334a93cda78SKip Macy 13356e6b3f7cSQing Li static struct llentry * 1336314294deSAlexander V. Chernikov in_lltable_new(struct in_addr addr4, u_int flags) 13376e6b3f7cSQing Li { 13386e6b3f7cSQing Li struct in_llentry *lle; 13396e6b3f7cSQing Li 134090b357f6SGleb Smirnoff lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 13416e6b3f7cSQing Li if (lle == NULL) /* NB: caller generates msg */ 13426e6b3f7cSQing Li return NULL; 13436e6b3f7cSQing Li 13446e6b3f7cSQing Li /* 13456e6b3f7cSQing Li * For IPv4 this will trigger "arpresolve" to generate 13466e6b3f7cSQing Li * an ARP request. 13476e6b3f7cSQing Li */ 1348a98c06f1SGleb Smirnoff lle->base.la_expire = time_uptime; /* mark expired */ 1349314294deSAlexander V. Chernikov lle->base.r_l3addr.addr4 = addr4; 13506e6b3f7cSQing Li lle->base.lle_refcnt = 1; 135111cdad98SAlexander V. Chernikov lle->base.lle_free = in_lltable_destroy_lle; 13526e6b3f7cSQing Li LLE_LOCK_INIT(&lle->base); 1353f8aee88fSAlexander V. Chernikov LLE_REQ_INIT(&lle->base); 13540447c136SAlexander V. Chernikov callout_init(&lle->base.lle_timer, 1); 1355ea537929SGleb Smirnoff 1356ea537929SGleb Smirnoff return (&lle->base); 13576e6b3f7cSQing Li } 13586e6b3f7cSQing Li 1359c9d763bfSQing Li #define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 13603e7a2321SAlexander V. Chernikov ((((d).s_addr ^ (a).s_addr) & (m).s_addr)) == 0 ) 1361c9d763bfSQing Li 136211cdad98SAlexander V. Chernikov static int 13633e7a2321SAlexander V. Chernikov in_lltable_match_prefix(const struct sockaddr *saddr, 13643e7a2321SAlexander V. Chernikov const struct sockaddr *smask, u_int flags, struct llentry *lle) 1365c9d763bfSQing Li { 13663e7a2321SAlexander V. Chernikov struct in_addr addr, mask, lle_addr; 13673e7a2321SAlexander V. Chernikov 13683e7a2321SAlexander V. Chernikov addr = ((const struct sockaddr_in *)saddr)->sin_addr; 13693e7a2321SAlexander V. Chernikov mask = ((const struct sockaddr_in *)smask)->sin_addr; 13703e7a2321SAlexander V. Chernikov lle_addr.s_addr = ntohl(lle->r_l3addr.addr4.s_addr); 13713e7a2321SAlexander V. Chernikov 13723e7a2321SAlexander V. Chernikov if (IN_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 13733e7a2321SAlexander V. Chernikov return (0); 13743e7a2321SAlexander V. Chernikov 13753e7a2321SAlexander V. Chernikov if (lle->la_flags & LLE_IFADDR) { 13765b84dc78SQing Li /* 13773e7a2321SAlexander V. Chernikov * Delete LLE_IFADDR records IFF address & flag matches. 13783e7a2321SAlexander V. Chernikov * Note that addr is the interface address within prefix 13793e7a2321SAlexander V. Chernikov * being matched. 13803e7a2321SAlexander V. Chernikov * Note also we should handle 'ifdown' cases without removing 13813e7a2321SAlexander V. Chernikov * ifaddr macs. 13825b84dc78SQing Li */ 13833e7a2321SAlexander V. Chernikov if (addr.s_addr == lle_addr.s_addr && (flags & LLE_STATIC) != 0) 13843e7a2321SAlexander V. Chernikov return (1); 13853e7a2321SAlexander V. Chernikov return (0); 13863e7a2321SAlexander V. Chernikov } 13873e7a2321SAlexander V. Chernikov 13883e7a2321SAlexander V. Chernikov /* flags & LLE_STATIC means deleting both dynamic and static entries */ 13893e7a2321SAlexander V. Chernikov if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 139011cdad98SAlexander V. Chernikov return (1); 139111cdad98SAlexander V. Chernikov 139211cdad98SAlexander V. Chernikov return (0); 139311cdad98SAlexander V. Chernikov } 139411cdad98SAlexander V. Chernikov 139511cdad98SAlexander V. Chernikov static void 139611cdad98SAlexander V. Chernikov in_lltable_free_entry(struct lltable *llt, struct llentry *lle) 139711cdad98SAlexander V. Chernikov { 139811cdad98SAlexander V. Chernikov size_t pkts_dropped; 139911cdad98SAlexander V. Chernikov 140011cdad98SAlexander V. Chernikov LLE_WLOCK_ASSERT(lle); 140111cdad98SAlexander V. Chernikov KASSERT(llt != NULL, ("lltable is NULL")); 140211cdad98SAlexander V. Chernikov 140311cdad98SAlexander V. Chernikov /* Unlink entry from table if not already */ 140411cdad98SAlexander V. Chernikov if ((lle->la_flags & LLE_LINKED) != 0) { 1405f6960e20SMatt Macy IF_AFDATA_WLOCK_ASSERT(llt->llt_ifp); 140611cdad98SAlexander V. Chernikov lltable_unlink_entry(llt, lle); 140711cdad98SAlexander V. Chernikov } 140811cdad98SAlexander V. Chernikov 140911cdad98SAlexander V. Chernikov /* Drop hold queue */ 1410e162ea60SGeorge V. Neville-Neil pkts_dropped = llentry_free(lle); 1411e162ea60SGeorge V. Neville-Neil ARPSTAT_ADD(dropped, pkts_dropped); 1412c9d763bfSQing Li } 1413c9d763bfSQing Li 14146e6b3f7cSQing Li static int 1415c7ab6602SQing Li in_lltable_rtcheck(struct ifnet *ifp, u_int flags, const struct sockaddr *l3addr) 14166e6b3f7cSQing Li { 1417936f4a42SAlexander V. Chernikov struct nhop_object *nh; 1418936f4a42SAlexander V. Chernikov struct in_addr addr; 14196e6b3f7cSQing Li 14206e6b3f7cSQing Li KASSERT(l3addr->sa_family == AF_INET, 14216e6b3f7cSQing Li ("sin_family %d", l3addr->sa_family)); 14226e6b3f7cSQing Li 1423936f4a42SAlexander V. Chernikov addr = ((const struct sockaddr_in *)l3addr)->sin_addr; 142413e255faSMarko Zec 1425936f4a42SAlexander V. Chernikov nh = fib4_lookup(ifp->if_fib, addr, 0, NHR_NONE, 0); 1426936f4a42SAlexander V. Chernikov if (nh == NULL) 14276cf8e330SQing Li return (EINVAL); 14286cf8e330SQing Li 142913e255faSMarko Zec /* 143013e255faSMarko Zec * If the gateway for an existing host route matches the target L3 14316cf8e330SQing Li * address, which is a special route inserted by some implementation 14326cf8e330SQing Li * such as MANET, and the interface is of the correct type, then 14336cf8e330SQing Li * allow for ARP to proceed. 143413e255faSMarko Zec */ 1435936f4a42SAlexander V. Chernikov if (nh->nh_flags & NHF_GATEWAY) { 1436936f4a42SAlexander V. Chernikov if (!(nh->nh_flags & NHF_HOST) || nh->nh_ifp->if_type != IFT_ETHER || 1437936f4a42SAlexander V. Chernikov (nh->nh_ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) != 0 || 1438936f4a42SAlexander V. Chernikov memcmp(nh->gw_sa.sa_data, l3addr->sa_data, 143915d25219SQing Li sizeof(in_addr_t)) != 0) { 1440db92413eSQing Li return (EINVAL); 1441db92413eSQing Li } 144215d25219SQing Li } 1443db92413eSQing Li 1444db92413eSQing Li /* 1445db92413eSQing Li * Make sure that at least the destination address is covered 1446db92413eSQing Li * by the route. This is for handling the case where 2 or more 1447db92413eSQing Li * interfaces have the same prefix. An incoming packet arrives 1448db92413eSQing Li * on one interface and the corresponding outgoing packet leaves 1449db92413eSQing Li * another interface. 1450db92413eSQing Li */ 1451936f4a42SAlexander V. Chernikov if ((nh->nh_ifp != ifp) && (nh->nh_flags & NHF_HOST) == 0) { 1452936f4a42SAlexander V. Chernikov struct in_ifaddr *ia = (struct in_ifaddr *)ifaof_ifpforaddr(l3addr, ifp); 1453936f4a42SAlexander V. Chernikov struct in_addr dst_addr, mask_addr; 1454db92413eSQing Li 1455936f4a42SAlexander V. Chernikov if (ia == NULL) 1456936f4a42SAlexander V. Chernikov return (EINVAL); 1457936f4a42SAlexander V. Chernikov 1458b3664a14SQing Li /* 1459936f4a42SAlexander V. Chernikov * ifaof_ifpforaddr() returns _best matching_ IFA. 1460936f4a42SAlexander V. Chernikov * It is possible that ifa prefix does not cover our address. 1461936f4a42SAlexander V. Chernikov * Explicitly verify and fail if that's the case. 1462b3664a14SQing Li */ 1463936f4a42SAlexander V. Chernikov dst_addr = IA_SIN(ia)->sin_addr; 1464936f4a42SAlexander V. Chernikov mask_addr.s_addr = htonl(ia->ia_subnetmask); 1465936f4a42SAlexander V. Chernikov 1466936f4a42SAlexander V. Chernikov if (!IN_ARE_MASKED_ADDR_EQUAL(dst_addr, addr, mask_addr)) 1467b3664a14SQing Li return (EINVAL); 1468db92413eSQing Li } 1469db92413eSQing Li 147015d25219SQing Li return (0); 14716e6b3f7cSQing Li } 14726e6b3f7cSQing Li 147311cdad98SAlexander V. Chernikov static inline uint32_t 147411cdad98SAlexander V. Chernikov in_lltable_hash_dst(const struct in_addr dst, uint32_t hsize) 147511cdad98SAlexander V. Chernikov { 147611cdad98SAlexander V. Chernikov 147711cdad98SAlexander V. Chernikov return (IN_LLTBL_HASH(dst.s_addr, hsize)); 147811cdad98SAlexander V. Chernikov } 147911cdad98SAlexander V. Chernikov 148011cdad98SAlexander V. Chernikov static uint32_t 148111cdad98SAlexander V. Chernikov in_lltable_hash(const struct llentry *lle, uint32_t hsize) 148211cdad98SAlexander V. Chernikov { 148311cdad98SAlexander V. Chernikov 1484314294deSAlexander V. Chernikov return (in_lltable_hash_dst(lle->r_l3addr.addr4, hsize)); 148511cdad98SAlexander V. Chernikov } 148611cdad98SAlexander V. Chernikov 148711cdad98SAlexander V. Chernikov static void 148811cdad98SAlexander V. Chernikov in_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 148911cdad98SAlexander V. Chernikov { 149011cdad98SAlexander V. Chernikov struct sockaddr_in *sin; 149111cdad98SAlexander V. Chernikov 149211cdad98SAlexander V. Chernikov sin = (struct sockaddr_in *)sa; 149311cdad98SAlexander V. Chernikov bzero(sin, sizeof(*sin)); 149411cdad98SAlexander V. Chernikov sin->sin_family = AF_INET; 149511cdad98SAlexander V. Chernikov sin->sin_len = sizeof(*sin); 1496314294deSAlexander V. Chernikov sin->sin_addr = lle->r_l3addr.addr4; 149711cdad98SAlexander V. Chernikov } 149811cdad98SAlexander V. Chernikov 1499b4b1367aSAlexander V. Chernikov static inline struct llentry * 1500b4b1367aSAlexander V. Chernikov in_lltable_find_dst(struct lltable *llt, struct in_addr dst) 1501b4b1367aSAlexander V. Chernikov { 1502b4b1367aSAlexander V. Chernikov struct llentry *lle; 1503b4b1367aSAlexander V. Chernikov struct llentries *lleh; 150411cdad98SAlexander V. Chernikov u_int hashidx; 1505b4b1367aSAlexander V. Chernikov 15063a749863SAlexander V. Chernikov hashidx = in_lltable_hash_dst(dst, llt->llt_hsize); 150711cdad98SAlexander V. Chernikov lleh = &llt->lle_head[hashidx]; 15084f6c66ccSMatt Macy CK_LIST_FOREACH(lle, lleh, lle_next) { 1509b4b1367aSAlexander V. Chernikov if (lle->la_flags & LLE_DELETED) 1510b4b1367aSAlexander V. Chernikov continue; 1511314294deSAlexander V. Chernikov if (lle->r_l3addr.addr4.s_addr == dst.s_addr) 1512b4b1367aSAlexander V. Chernikov break; 1513b4b1367aSAlexander V. Chernikov } 1514b4b1367aSAlexander V. Chernikov 1515b4b1367aSAlexander V. Chernikov return (lle); 1516b4b1367aSAlexander V. Chernikov } 1517b4b1367aSAlexander V. Chernikov 15183e7a2321SAlexander V. Chernikov static void 15193e7a2321SAlexander V. Chernikov in_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 1520b4b1367aSAlexander V. Chernikov { 1521b4b1367aSAlexander V. Chernikov 1522b4b1367aSAlexander V. Chernikov lle->la_flags |= LLE_DELETED; 1523b4b1367aSAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 1524b4b1367aSAlexander V. Chernikov #ifdef DIAGNOSTIC 1525b4b1367aSAlexander V. Chernikov log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1526b4b1367aSAlexander V. Chernikov #endif 1527b4b1367aSAlexander V. Chernikov llentry_free(lle); 1528b4b1367aSAlexander V. Chernikov } 1529b4b1367aSAlexander V. Chernikov 1530b4b1367aSAlexander V. Chernikov static struct llentry * 15315a255516SAlexander V. Chernikov in_lltable_alloc(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1532b4b1367aSAlexander V. Chernikov { 1533b4b1367aSAlexander V. Chernikov const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1534b4b1367aSAlexander V. Chernikov struct ifnet *ifp = llt->llt_ifp; 1535b4b1367aSAlexander V. Chernikov struct llentry *lle; 15364fb3a820SAlexander V. Chernikov char linkhdr[LLE_MAX_LINKHDR]; 15374fb3a820SAlexander V. Chernikov size_t linkhdrsize; 15384fb3a820SAlexander V. Chernikov int lladdr_off; 1539b4b1367aSAlexander V. Chernikov 1540b4b1367aSAlexander V. Chernikov KASSERT(l3addr->sa_family == AF_INET, 1541b4b1367aSAlexander V. Chernikov ("sin_family %d", l3addr->sa_family)); 1542b4b1367aSAlexander V. Chernikov 1543b4b1367aSAlexander V. Chernikov /* 1544b4b1367aSAlexander V. Chernikov * A route that covers the given address must have 1545b4b1367aSAlexander V. Chernikov * been installed 1st because we are doing a resolution, 1546b4b1367aSAlexander V. Chernikov * verify this. 1547b4b1367aSAlexander V. Chernikov */ 1548b4b1367aSAlexander V. Chernikov if (!(flags & LLE_IFADDR) && 1549b4b1367aSAlexander V. Chernikov in_lltable_rtcheck(ifp, flags, l3addr) != 0) 1550b4b1367aSAlexander V. Chernikov return (NULL); 1551b4b1367aSAlexander V. Chernikov 1552314294deSAlexander V. Chernikov lle = in_lltable_new(sin->sin_addr, flags); 1553b4b1367aSAlexander V. Chernikov if (lle == NULL) { 1554b4b1367aSAlexander V. Chernikov log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1555b4b1367aSAlexander V. Chernikov return (NULL); 1556b4b1367aSAlexander V. Chernikov } 1557b4b1367aSAlexander V. Chernikov lle->la_flags = flags; 1558f8aee88fSAlexander V. Chernikov if (flags & LLE_STATIC) 1559f8aee88fSAlexander V. Chernikov lle->r_flags |= RLLE_VALID; 1560b4b1367aSAlexander V. Chernikov if ((flags & LLE_IFADDR) == LLE_IFADDR) { 15614fb3a820SAlexander V. Chernikov linkhdrsize = LLE_MAX_LINKHDR; 15624fb3a820SAlexander V. Chernikov if (lltable_calc_llheader(ifp, AF_INET, IF_LLADDR(ifp), 15632769d062SConrad Meyer linkhdr, &linkhdrsize, &lladdr_off) != 0) { 15642a4bd982SGleb Smirnoff NET_EPOCH_CALL(in_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 15654fb3a820SAlexander V. Chernikov return (NULL); 15662769d062SConrad Meyer } 15674fb3a820SAlexander V. Chernikov lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 15684fb3a820SAlexander V. Chernikov lladdr_off); 1569ddd208f7SAlexander V. Chernikov lle->la_flags |= LLE_STATIC; 1570f8aee88fSAlexander V. Chernikov lle->r_flags |= (RLLE_VALID | RLLE_IFADDR); 1571b4b1367aSAlexander V. Chernikov } 1572b4b1367aSAlexander V. Chernikov 1573b4b1367aSAlexander V. Chernikov return (lle); 1574b4b1367aSAlexander V. Chernikov } 1575b4b1367aSAlexander V. Chernikov 15766e6b3f7cSQing Li /* 15776e6b3f7cSQing Li * Return NULL if not found or marked for deletion. 15786e6b3f7cSQing Li * If found return lle read locked. 15796e6b3f7cSQing Li */ 15806e6b3f7cSQing Li static struct llentry * 15816e6b3f7cSQing Li in_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 15826e6b3f7cSQing Li { 15836e6b3f7cSQing Li const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 15846e6b3f7cSQing Li struct llentry *lle; 15856e6b3f7cSQing Li 15866e4cd746SMarius Strobl IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 15876e6b3f7cSQing Li KASSERT(l3addr->sa_family == AF_INET, 15886e6b3f7cSQing Li ("sin_family %d", l3addr->sa_family)); 158949cf58e5SMark Johnston KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) != 159049cf58e5SMark Johnston (LLE_UNLOCKED | LLE_EXCLUSIVE), 159149cf58e5SMark Johnston ("wrong lle request flags: %#x", flags)); 1592b4b1367aSAlexander V. Chernikov 159349cf58e5SMark Johnston lle = in_lltable_find_dst(llt, sin->sin_addr); 1594b4b1367aSAlexander V. Chernikov if (lle == NULL) 15956e6b3f7cSQing Li return (NULL); 1596f8aee88fSAlexander V. Chernikov if (flags & LLE_UNLOCKED) 1597f8aee88fSAlexander V. Chernikov return (lle); 1598f8aee88fSAlexander V. Chernikov 15996e6b3f7cSQing Li if (flags & LLE_EXCLUSIVE) 16006e6b3f7cSQing Li LLE_WLOCK(lle); 16016e6b3f7cSQing Li else 16026e6b3f7cSQing Li LLE_RLOCK(lle); 1603b4b1367aSAlexander V. Chernikov 1604c06cc56eSMark Johnston /* 1605c06cc56eSMark Johnston * If the afdata lock is not held, the LLE may have been unlinked while 1606c06cc56eSMark Johnston * we were blocked on the LLE lock. Check for this case. 1607c06cc56eSMark Johnston */ 1608c06cc56eSMark Johnston if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) { 1609c06cc56eSMark Johnston if (flags & LLE_EXCLUSIVE) 1610c06cc56eSMark Johnston LLE_WUNLOCK(lle); 1611c06cc56eSMark Johnston else 1612c06cc56eSMark Johnston LLE_RUNLOCK(lle); 1613c06cc56eSMark Johnston return (NULL); 1614c06cc56eSMark Johnston } 16156e6b3f7cSQing Li return (lle); 16166e6b3f7cSQing Li } 16176e6b3f7cSQing Li 16186e6b3f7cSQing Li static int 161911cdad98SAlexander V. Chernikov in_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 162011cdad98SAlexander V. Chernikov struct sysctl_req *wr) 16216e6b3f7cSQing Li { 16226e6b3f7cSQing Li struct ifnet *ifp = llt->llt_ifp; 16236e6b3f7cSQing Li /* XXX stack use */ 16246e6b3f7cSQing Li struct { 16256e6b3f7cSQing Li struct rt_msghdr rtm; 16269711a168SGleb Smirnoff struct sockaddr_in sin; 16276e6b3f7cSQing Li struct sockaddr_dl sdl; 16286e6b3f7cSQing Li } arpc; 16296e6b3f7cSQing Li struct sockaddr_dl *sdl; 163011cdad98SAlexander V. Chernikov int error; 16316e6b3f7cSQing Li 163211cdad98SAlexander V. Chernikov bzero(&arpc, sizeof(arpc)); 16336e6b3f7cSQing Li /* skip deleted entries */ 163493704ac5SQing Li if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 163511cdad98SAlexander V. Chernikov return (0); 1636813dd6aeSBjoern A. Zeeb /* Skip if jailed and not a valid IP of the prison. */ 163711cdad98SAlexander V. Chernikov lltable_fill_sa_entry(lle,(struct sockaddr *)&arpc.sin); 1638514ef08cSBrooks Davis if (prison_if(wr->td->td_ucred, (struct sockaddr *)&arpc.sin) != 0) 163911cdad98SAlexander V. Chernikov return (0); 16406e6b3f7cSQing Li /* 16416e6b3f7cSQing Li * produce a msg made of: 16426e6b3f7cSQing Li * struct rt_msghdr; 16439711a168SGleb Smirnoff * struct sockaddr_in; (IPv4) 16446e6b3f7cSQing Li * struct sockaddr_dl; 16456e6b3f7cSQing Li */ 16466e6b3f7cSQing Li arpc.rtm.rtm_msglen = sizeof(arpc); 1647c0e9a8a1SHartmut Brandt arpc.rtm.rtm_version = RTM_VERSION; 1648c0e9a8a1SHartmut Brandt arpc.rtm.rtm_type = RTM_GET; 1649c0e9a8a1SHartmut Brandt arpc.rtm.rtm_flags = RTF_UP; 1650c0e9a8a1SHartmut Brandt arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 16516e6b3f7cSQing Li 16526e6b3f7cSQing Li /* publish */ 16539711a168SGleb Smirnoff if (lle->la_flags & LLE_PUB) 16546e6b3f7cSQing Li arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 16556e6b3f7cSQing Li 16566e6b3f7cSQing Li sdl = &arpc.sdl; 16576e6b3f7cSQing Li sdl->sdl_family = AF_LINK; 16586e6b3f7cSQing Li sdl->sdl_len = sizeof(*sdl); 16596e6b3f7cSQing Li sdl->sdl_index = ifp->if_index; 16606e6b3f7cSQing Li sdl->sdl_type = ifp->if_type; 166193704ac5SQing Li if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 166293704ac5SQing Li sdl->sdl_alen = ifp->if_addrlen; 16634fb3a820SAlexander V. Chernikov bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 166493704ac5SQing Li } else { 166593704ac5SQing Li sdl->sdl_alen = 0; 166693704ac5SQing Li bzero(LLADDR(sdl), ifp->if_addrlen); 166793704ac5SQing Li } 16686e6b3f7cSQing Li 16696e6b3f7cSQing Li arpc.rtm.rtm_rmx.rmx_expire = 16706e6b3f7cSQing Li lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 16718eca593cSQing Li arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 16726e6b3f7cSQing Li if (lle->la_flags & LLE_STATIC) 16736e6b3f7cSQing Li arpc.rtm.rtm_flags |= RTF_STATIC; 16744a336ef4SAlexander V. Chernikov if (lle->la_flags & LLE_IFADDR) 16754a336ef4SAlexander V. Chernikov arpc.rtm.rtm_flags |= RTF_PINNED; 16766e6b3f7cSQing Li arpc.rtm.rtm_index = ifp->if_index; 16776e6b3f7cSQing Li error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 167811cdad98SAlexander V. Chernikov 167911cdad98SAlexander V. Chernikov return (error); 16806e6b3f7cSQing Li } 16816e6b3f7cSQing Li 16823a749863SAlexander V. Chernikov static struct lltable * 16833a749863SAlexander V. Chernikov in_lltattach(struct ifnet *ifp) 16846e6b3f7cSQing Li { 1685d10910e6SBruce M Simpson struct lltable *llt; 16866e6b3f7cSQing Li 16873a749863SAlexander V. Chernikov llt = lltable_allocate_htbl(IN_LLTBL_DEFAULT_HSIZE); 1688721cd2e0SAlexander V. Chernikov llt->llt_af = AF_INET; 1689721cd2e0SAlexander V. Chernikov llt->llt_ifp = ifp; 1690d10910e6SBruce M Simpson 16916e6b3f7cSQing Li llt->llt_lookup = in_lltable_lookup; 16925a255516SAlexander V. Chernikov llt->llt_alloc_entry = in_lltable_alloc; 16933e7a2321SAlexander V. Chernikov llt->llt_delete_entry = in_lltable_delete_entry; 169411cdad98SAlexander V. Chernikov llt->llt_dump_entry = in_lltable_dump_entry; 169511cdad98SAlexander V. Chernikov llt->llt_hash = in_lltable_hash; 169611cdad98SAlexander V. Chernikov llt->llt_fill_sa_entry = in_lltable_fill_sa_entry; 169711cdad98SAlexander V. Chernikov llt->llt_free_entry = in_lltable_free_entry; 169811cdad98SAlexander V. Chernikov llt->llt_match_prefix = in_lltable_match_prefix; 1699f3a3b061SAlexander V. Chernikov llt->llt_mark_used = llentry_mark_used; 1700721cd2e0SAlexander V. Chernikov lltable_link(llt); 1701d10910e6SBruce M Simpson 17023a749863SAlexander V. Chernikov return (llt); 17033a749863SAlexander V. Chernikov } 17043a749863SAlexander V. Chernikov 17053a749863SAlexander V. Chernikov void * 17063a749863SAlexander V. Chernikov in_domifattach(struct ifnet *ifp) 17073a749863SAlexander V. Chernikov { 17083a749863SAlexander V. Chernikov struct in_ifinfo *ii; 17093a749863SAlexander V. Chernikov 1710721cd2e0SAlexander V. Chernikov ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 171141cb42a6SAlexander V. Chernikov 17123a749863SAlexander V. Chernikov ii->ii_llt = in_lltattach(ifp); 1713d10910e6SBruce M Simpson ii->ii_igmp = igmp_domifattach(ifp); 1714d10910e6SBruce M Simpson 171541cb42a6SAlexander V. Chernikov return (ii); 17166e6b3f7cSQing Li } 17176e6b3f7cSQing Li 17186e6b3f7cSQing Li void 1719d10910e6SBruce M Simpson in_domifdetach(struct ifnet *ifp, void *aux) 17206e6b3f7cSQing Li { 1721d10910e6SBruce M Simpson struct in_ifinfo *ii = (struct in_ifinfo *)aux; 17226e6b3f7cSQing Li 1723d10910e6SBruce M Simpson igmp_domifdetach(ifp); 1724d10910e6SBruce M Simpson lltable_free(ii->ii_llt); 1725d10910e6SBruce M Simpson free(ii, M_IFADDR); 17266e6b3f7cSQing Li } 1727