in.c revision 213932
1139823Simp/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 4137668Smlaier * Copyright (C) 2001 WIDE Project. All rights reserved. 51541Srgrimes * 61541Srgrimes * Redistribution and use in source and binary forms, with or without 71541Srgrimes * modification, are permitted provided that the following conditions 81541Srgrimes * are met: 91541Srgrimes * 1. Redistributions of source code must retain the above copyright 101541Srgrimes * notice, this list of conditions and the following disclaimer. 111541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer in the 131541Srgrimes * documentation and/or other materials provided with the distribution. 141541Srgrimes * 4. Neither the name of the University nor the names of its contributors 151541Srgrimes * may be used to endorse or promote products derived from this software 161541Srgrimes * without specific prior written permission. 171541Srgrimes * 181541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 191541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 201541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 211541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 221541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 231541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 241541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 251541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 261541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 271541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 281541Srgrimes * SUCH DAMAGE. 291541Srgrimes * 3010939Swollman * @(#)in.c 8.4 (Berkeley) 1/9/95 311541Srgrimes */ 321541Srgrimes 33172467Ssilby#include <sys/cdefs.h> 34172467Ssilby__FBSDID("$FreeBSD: head/sys/netinet/in.c 213932 2010-10-16 19:53:22Z bz $"); 35172467Ssilby 36204902Sqingli#include "opt_mpath.h" 37143868Sglebius 381541Srgrimes#include <sys/param.h> 391549Srgrimes#include <sys/systm.h> 4024204Sbde#include <sys/sockio.h> 411541Srgrimes#include <sys/malloc.h> 42164033Srwatson#include <sys/priv.h> 431541Srgrimes#include <sys/socket.h> 44186948Sbz#include <sys/jail.h> 4512704Sphk#include <sys/kernel.h> 46186948Sbz#include <sys/proc.h> 4712704Sphk#include <sys/sysctl.h> 48192011Sqingli#include <sys/syslog.h> 491541Srgrimes 501541Srgrimes#include <net/if.h> 51195914Sqingli#include <net/if_var.h> 52192011Sqingli#include <net/if_dl.h> 53186119Sqingli#include <net/if_llatbl.h> 5455009Sshin#include <net/if_types.h> 551541Srgrimes#include <net/route.h> 56192011Sqingli#include <net/vnet.h> 571541Srgrimes 581541Srgrimes#include <netinet/in.h> 591541Srgrimes#include <netinet/in_var.h> 6081127Sume#include <netinet/in_pcb.h> 61170613Sbms#include <netinet/ip_var.h> 62189592Sbms#include <netinet/igmp_var.h> 63195699Srwatson#include <netinet/udp.h> 64195699Srwatson#include <netinet/udp_var.h> 651541Srgrimes 6692723Salfredstatic int in_mask2len(struct in_addr *); 6792723Salfredstatic void in_len2mask(struct in_addr *, int); 6892723Salfredstatic int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 6992723Salfred struct ifnet *, struct thread *); 7055009Sshin 71137628Smlaierstatic int in_addprefix(struct in_ifaddr *, int); 72137628Smlaierstatic int in_scrubprefix(struct in_ifaddr *); 7392723Salfredstatic void in_socktrim(struct sockaddr_in *); 7492723Salfredstatic int in_ifinit(struct ifnet *, 7592723Salfred struct in_ifaddr *, struct sockaddr_in *, int); 76167729Sbmsstatic void in_purgemaddrs(struct ifnet *); 771541Srgrimes 78195699Srwatsonstatic VNET_DEFINE(int, subnetsarelocal); 79195727Srwatson#define V_subnetsarelocal VNET(subnetsarelocal) 80195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, 81195699Srwatson &VNET_NAME(subnetsarelocal), 0, 82183550Szec "Treat all subnets as directly connected"); 83207369Sbzstatic VNET_DEFINE(int, sameprefixcarponly); 84207369Sbz#define V_sameprefixcarponly VNET(sameprefixcarponly) 85195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, 86195699Srwatson &VNET_NAME(sameprefixcarponly), 0, 87149221Sglebius "Refuse to create same prefixes on different interfaces"); 8821666Swollman 89207369SbzVNET_DECLARE(struct inpcbinfo, ripcbinfo); 90207369Sbz#define V_ripcbinfo VNET(ripcbinfo) 91207369Sbz 921541Srgrimes/* 931541Srgrimes * Return 1 if an internet address is for a ``local'' host 941541Srgrimes * (one to which we have a connection). If subnetsarelocal 951541Srgrimes * is true, this includes other subnets of the local net. 961541Srgrimes * Otherwise, it includes only the directly-connected (sub)nets. 971541Srgrimes */ 981549Srgrimesint 99169454Srwatsonin_localaddr(struct in_addr in) 1001541Srgrimes{ 1011541Srgrimes register u_long i = ntohl(in.s_addr); 1021541Srgrimes register struct in_ifaddr *ia; 1031541Srgrimes 104194951Srwatson IN_IFADDR_RLOCK(); 105181803Sbz if (V_subnetsarelocal) { 106194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 107194951Srwatson if ((i & ia->ia_netmask) == ia->ia_net) { 108194951Srwatson IN_IFADDR_RUNLOCK(); 1091541Srgrimes return (1); 110194951Srwatson } 111194951Srwatson } 1121541Srgrimes } else { 113194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 114194951Srwatson if ((i & ia->ia_subnetmask) == ia->ia_subnet) { 115194951Srwatson IN_IFADDR_RUNLOCK(); 1161541Srgrimes return (1); 117194951Srwatson } 118194951Srwatson } 1191541Srgrimes } 120194951Srwatson IN_IFADDR_RUNLOCK(); 1211541Srgrimes return (0); 1221541Srgrimes} 1231541Srgrimes 1241541Srgrimes/* 125133486Sandre * Return 1 if an internet address is for the local host and configured 126133486Sandre * on one of its interfaces. 127133486Sandre */ 128133486Sandreint 129169454Srwatsonin_localip(struct in_addr in) 130133486Sandre{ 131133486Sandre struct in_ifaddr *ia; 132133486Sandre 133194951Srwatson IN_IFADDR_RLOCK(); 134133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 135194951Srwatson if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { 136194951Srwatson IN_IFADDR_RUNLOCK(); 137184295Sbz return (1); 138194951Srwatson } 139133486Sandre } 140194951Srwatson IN_IFADDR_RUNLOCK(); 141184295Sbz return (0); 142133486Sandre} 143133486Sandre 144133486Sandre/* 1451541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1461541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1471541Srgrimes * may be forwarded. 1481541Srgrimes */ 1491549Srgrimesint 150169454Srwatsonin_canforward(struct in_addr in) 1511541Srgrimes{ 1521541Srgrimes register u_long i = ntohl(in.s_addr); 1531541Srgrimes register u_long net; 1541541Srgrimes 155166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1561541Srgrimes return (0); 1571541Srgrimes if (IN_CLASSA(i)) { 1581541Srgrimes net = i & IN_CLASSA_NET; 1591541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1601541Srgrimes return (0); 1611541Srgrimes } 1621541Srgrimes return (1); 1631541Srgrimes} 1641541Srgrimes 1651541Srgrimes/* 1661541Srgrimes * Trim a mask in a sockaddr 1671541Srgrimes */ 16812296Sphkstatic void 169169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1701541Srgrimes{ 1711541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1721541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1731541Srgrimes 1741541Srgrimes ap->sin_len = 0; 1754127Swollman while (--cp >= cplim) 176133874Srwatson if (*cp) { 1771541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1781541Srgrimes break; 1791541Srgrimes } 1801541Srgrimes} 1811541Srgrimes 18255009Sshinstatic int 18355009Sshinin_mask2len(mask) 18455009Sshin struct in_addr *mask; 18555009Sshin{ 18655009Sshin int x, y; 18755009Sshin u_char *p; 18855009Sshin 18955009Sshin p = (u_char *)mask; 19055009Sshin for (x = 0; x < sizeof(*mask); x++) { 19155009Sshin if (p[x] != 0xff) 19255009Sshin break; 19355009Sshin } 19455009Sshin y = 0; 19555009Sshin if (x < sizeof(*mask)) { 19655009Sshin for (y = 0; y < 8; y++) { 19755009Sshin if ((p[x] & (0x80 >> y)) == 0) 19855009Sshin break; 19955009Sshin } 20055009Sshin } 201184295Sbz return (x * 8 + y); 20255009Sshin} 20355009Sshin 20455009Sshinstatic void 205169454Srwatsonin_len2mask(struct in_addr *mask, int len) 20655009Sshin{ 20755009Sshin int i; 20855009Sshin u_char *p; 20955009Sshin 21055009Sshin p = (u_char *)mask; 21155009Sshin bzero(mask, sizeof(*mask)); 21255009Sshin for (i = 0; i < len / 8; i++) 21355009Sshin p[i] = 0xff; 21455009Sshin if (len % 8) 21555009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 21655009Sshin} 21755009Sshin 2181541Srgrimes/* 2191541Srgrimes * Generic internet control operations (ioctl's). 220191443Srwatson * 221191443Srwatson * ifp is NULL if not an interface-specific ioctl. 2221541Srgrimes */ 2231541Srgrimes/* ARGSUSED */ 2241549Srgrimesint 225169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 226169454Srwatson struct thread *td) 2271541Srgrimes{ 2281541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 229184295Sbz register struct in_ifaddr *ia, *iap; 2301541Srgrimes register struct ifaddr *ifa; 231168032Sbms struct in_addr allhosts_addr; 23284102Sjlemon struct in_addr dst; 233189592Sbms struct in_ifinfo *ii; 2341541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 2351541Srgrimes struct sockaddr_in oldaddr; 236194951Srwatson int error, hostIsNew, iaIsNew, maskIsNew; 237168032Sbms int iaIsFirst; 2381541Srgrimes 239184295Sbz ia = NULL; 240168032Sbms iaIsFirst = 0; 24187124Sbrian iaIsNew = 0; 242168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 24387124Sbrian 244191443Srwatson /* 245191443Srwatson * Filter out ioctls we implement directly; forward the rest on to 246191443Srwatson * in_lifaddr_ioctl() and ifp->if_ioctl(). 247191443Srwatson */ 24855009Sshin switch (cmd) { 249191443Srwatson case SIOCAIFADDR: 250191443Srwatson case SIOCDIFADDR: 251191443Srwatson case SIOCGIFADDR: 252191443Srwatson case SIOCGIFBRDADDR: 253191443Srwatson case SIOCGIFDSTADDR: 254191443Srwatson case SIOCGIFNETMASK: 255191443Srwatson case SIOCSIFADDR: 256191443Srwatson case SIOCSIFBRDADDR: 257191443Srwatson case SIOCSIFDSTADDR: 258191443Srwatson case SIOCSIFNETMASK: 259191443Srwatson break; 260191443Srwatson 26155009Sshin case SIOCALIFADDR: 262164033Srwatson if (td != NULL) { 263164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 264164033Srwatson if (error) 265164033Srwatson return (error); 266164033Srwatson } 267184295Sbz if (ifp == NULL) 268184295Sbz return (EINVAL); 269164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 270164033Srwatson 27155009Sshin case SIOCDLIFADDR: 272164033Srwatson if (td != NULL) { 273164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 274164033Srwatson if (error) 275164033Srwatson return (error); 276164033Srwatson } 277184295Sbz if (ifp == NULL) 278184295Sbz return (EINVAL); 279164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 280164033Srwatson 28155009Sshin case SIOCGLIFADDR: 282184295Sbz if (ifp == NULL) 283184295Sbz return (EINVAL); 28483366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 285191443Srwatson 286191443Srwatson default: 287191443Srwatson if (ifp == NULL || ifp->if_ioctl == NULL) 288191443Srwatson return (EOPNOTSUPP); 289191443Srwatson return ((*ifp->if_ioctl)(ifp, cmd, data)); 29055009Sshin } 29155009Sshin 292191443Srwatson if (ifp == NULL) 293191443Srwatson return (EADDRNOTAVAIL); 294191443Srwatson 2951541Srgrimes /* 296191456Srwatson * Security checks before we get involved in any work. 297191456Srwatson */ 298191456Srwatson switch (cmd) { 299191456Srwatson case SIOCAIFADDR: 300191456Srwatson case SIOCSIFADDR: 301191456Srwatson case SIOCSIFBRDADDR: 302191456Srwatson case SIOCSIFNETMASK: 303191456Srwatson case SIOCSIFDSTADDR: 304191456Srwatson if (td != NULL) { 305191456Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 306191456Srwatson if (error) 307191456Srwatson return (error); 308191456Srwatson } 309191456Srwatson break; 310191456Srwatson 311191456Srwatson case SIOCDIFADDR: 312191456Srwatson if (td != NULL) { 313191456Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 314191456Srwatson if (error) 315191456Srwatson return (error); 316191456Srwatson } 317191456Srwatson break; 318191456Srwatson } 319191456Srwatson 320191456Srwatson /* 3211541Srgrimes * Find address for this interface, if it exists. 32214632Sfenner * 323191443Srwatson * If an alias address was specified, find that one instead of the 324191443Srwatson * first one on the interface, if possible. 3251541Srgrimes */ 326191443Srwatson dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 327194951Srwatson IN_IFADDR_RLOCK(); 328191443Srwatson LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { 329191443Srwatson if (iap->ia_ifp == ifp && 330191443Srwatson iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 331191443Srwatson if (td == NULL || prison_check_ip4(td->td_ucred, 332191443Srwatson &dst) == 0) 333191443Srwatson ia = iap; 334191443Srwatson break; 335191443Srwatson } 336191443Srwatson } 337194760Srwatson if (ia != NULL) 338194760Srwatson ifa_ref(&ia->ia_ifa); 339194951Srwatson IN_IFADDR_RUNLOCK(); 340191443Srwatson if (ia == NULL) { 341194760Srwatson IF_ADDR_LOCK(ifp); 342191443Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 343191443Srwatson iap = ifatoia(ifa); 344191443Srwatson if (iap->ia_addr.sin_family == AF_INET) { 345191443Srwatson if (td != NULL && 346191443Srwatson prison_check_ip4(td->td_ucred, 347191443Srwatson &iap->ia_addr.sin_addr) != 0) 348191443Srwatson continue; 349191443Srwatson ia = iap; 35084102Sjlemon break; 35184102Sjlemon } 352191443Srwatson } 353194760Srwatson if (ia != NULL) 354194760Srwatson ifa_ref(&ia->ia_ifa); 355194760Srwatson IF_ADDR_UNLOCK(ifp); 35684102Sjlemon } 357191443Srwatson if (ia == NULL) 358191443Srwatson iaIsFirst = 1; 3591541Srgrimes 360191500Srwatson error = 0; 3611541Srgrimes switch (cmd) { 3621541Srgrimes case SIOCAIFADDR: 3631541Srgrimes case SIOCDIFADDR: 3648071Swollman if (ifra->ifra_addr.sin_family == AF_INET) { 365194760Srwatson struct in_ifaddr *oia; 366194760Srwatson 367194951Srwatson IN_IFADDR_RLOCK(); 36871999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 3698071Swollman if (ia->ia_ifp == ifp && 3708071Swollman ia->ia_addr.sin_addr.s_addr == 3718071Swollman ifra->ifra_addr.sin_addr.s_addr) 3728071Swollman break; 3738071Swollman } 374194760Srwatson if (ia != NULL && ia != oia) 375194760Srwatson ifa_ref(&ia->ia_ifa); 376194760Srwatson if (oia != NULL && ia != oia) 377194760Srwatson ifa_free(&oia->ia_ifa); 378194951Srwatson IN_IFADDR_RUNLOCK(); 3798876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 3808071Swollman && (cmd == SIOCAIFADDR) 3818071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 3828071Swollman == INADDR_ANY)) { 383191500Srwatson error = EDESTADDRREQ; 384194760Srwatson goto out; 3858071Swollman } 3861541Srgrimes } 387191500Srwatson if (cmd == SIOCDIFADDR && ia == NULL) { 388191500Srwatson error = EADDRNOTAVAIL; 389194760Srwatson goto out; 390191500Srwatson } 3911541Srgrimes /* FALLTHROUGH */ 3921541Srgrimes case SIOCSIFADDR: 3931541Srgrimes case SIOCSIFNETMASK: 3941541Srgrimes case SIOCSIFDSTADDR: 395184295Sbz if (ia == NULL) { 39620407Swollman ia = (struct in_ifaddr *) 397191500Srwatson malloc(sizeof *ia, M_IFADDR, M_NOWAIT | 398191500Srwatson M_ZERO); 399191500Srwatson if (ia == NULL) { 400191500Srwatson error = ENOBUFS; 401194760Srwatson goto out; 402191500Srwatson } 403191500Srwatson 40420407Swollman ifa = &ia->ia_ifa; 405194602Srwatson ifa_init(ifa); 40620407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 40720407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 40820407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 409108033Shsu 4101541Srgrimes ia->ia_sockmask.sin_len = 8; 41185740Sdes ia->ia_sockmask.sin_family = AF_INET; 4121541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 4131541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 4141541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 4151541Srgrimes } 4161541Srgrimes ia->ia_ifp = ifp; 417151824Sglebius 418194760Srwatson ifa_ref(ifa); /* if_addrhead */ 419194760Srwatson IF_ADDR_LOCK(ifp); 420191285Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 421194760Srwatson IF_ADDR_UNLOCK(ifp); 422194760Srwatson ifa_ref(ifa); /* in_ifaddrhead */ 423194951Srwatson IN_IFADDR_WLOCK(); 424181803Sbz TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 425194951Srwatson IN_IFADDR_WUNLOCK(); 42687124Sbrian iaIsNew = 1; 4271541Srgrimes } 4281541Srgrimes break; 4291541Srgrimes 4301541Srgrimes case SIOCSIFBRDADDR: 4311541Srgrimes case SIOCGIFADDR: 4321541Srgrimes case SIOCGIFNETMASK: 4331541Srgrimes case SIOCGIFDSTADDR: 4341541Srgrimes case SIOCGIFBRDADDR: 435191500Srwatson if (ia == NULL) { 436191500Srwatson error = EADDRNOTAVAIL; 437194760Srwatson goto out; 438191500Srwatson } 4391541Srgrimes break; 4401541Srgrimes } 441191500Srwatson 442191500Srwatson /* 443194760Srwatson * Most paths in this switch return directly or via out. Only paths 444194760Srwatson * that remove the address break in order to hit common removal code. 445191500Srwatson */ 4461541Srgrimes switch (cmd) { 4471541Srgrimes case SIOCGIFADDR: 4481541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 449194760Srwatson goto out; 4501541Srgrimes 4511541Srgrimes case SIOCGIFBRDADDR: 452191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 453191500Srwatson error = EINVAL; 454194760Srwatson goto out; 455191500Srwatson } 4561541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 457194760Srwatson goto out; 4581541Srgrimes 4591541Srgrimes case SIOCGIFDSTADDR: 460191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 461191500Srwatson error = EINVAL; 462194760Srwatson goto out; 463191500Srwatson } 4641541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 465194760Srwatson goto out; 4661541Srgrimes 4671541Srgrimes case SIOCGIFNETMASK: 4681541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 469194760Srwatson goto out; 4701541Srgrimes 4711541Srgrimes case SIOCSIFDSTADDR: 472191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 473191500Srwatson error = EINVAL; 474194760Srwatson goto out; 475191500Srwatson } 4761541Srgrimes oldaddr = ia->ia_dstaddr; 4771541Srgrimes ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 478184295Sbz if (ifp->if_ioctl != NULL) { 479146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 480146883Siedowse (caddr_t)ia); 481146883Siedowse if (error) { 482146883Siedowse ia->ia_dstaddr = oldaddr; 483194760Srwatson goto out; 484146883Siedowse } 4851541Srgrimes } 4861541Srgrimes if (ia->ia_flags & IFA_ROUTE) { 4871541Srgrimes ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 4881541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 4891541Srgrimes ia->ia_ifa.ifa_dstaddr = 4901541Srgrimes (struct sockaddr *)&ia->ia_dstaddr; 4911541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 4921541Srgrimes } 493194760Srwatson goto out; 4941541Srgrimes 4951541Srgrimes case SIOCSIFBRDADDR: 496191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 497191500Srwatson error = EINVAL; 498194760Srwatson goto out; 499191500Srwatson } 5001541Srgrimes ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 501194760Srwatson goto out; 5021541Srgrimes 5031541Srgrimes case SIOCSIFADDR: 50487124Sbrian error = in_ifinit(ifp, ia, 50587124Sbrian (struct sockaddr_in *) &ifr->ifr_addr, 1); 50687124Sbrian if (error != 0 && iaIsNew) 50787124Sbrian break; 508168032Sbms if (error == 0) { 509189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 510189592Sbms if (iaIsFirst && 511189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 512189592Sbms error = in_joingroup(ifp, &allhosts_addr, 513189592Sbms NULL, &ii->ii_allhosts); 514189592Sbms } 515126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 516168032Sbms } 517194760Srwatson error = 0; 518194760Srwatson goto out; 5191541Srgrimes 5201541Srgrimes case SIOCSIFNETMASK: 52185740Sdes ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 52285740Sdes ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 523194760Srwatson goto out; 5241541Srgrimes 5251541Srgrimes case SIOCAIFADDR: 5261541Srgrimes maskIsNew = 0; 5271541Srgrimes hostIsNew = 1; 5281541Srgrimes error = 0; 5291541Srgrimes if (ia->ia_addr.sin_family == AF_INET) { 5301541Srgrimes if (ifra->ifra_addr.sin_len == 0) { 5311541Srgrimes ifra->ifra_addr = ia->ia_addr; 5321541Srgrimes hostIsNew = 0; 5331541Srgrimes } else if (ifra->ifra_addr.sin_addr.s_addr == 5341541Srgrimes ia->ia_addr.sin_addr.s_addr) 5351541Srgrimes hostIsNew = 0; 5361541Srgrimes } 5371541Srgrimes if (ifra->ifra_mask.sin_len) { 538197210Sqingli /* 539197210Sqingli * QL: XXX 540197210Sqingli * Need to scrub the prefix here in case 541197210Sqingli * the issued command is SIOCAIFADDR with 542197210Sqingli * the same address, but with a different 543197210Sqingli * prefix length. And if the prefix length 544197210Sqingli * is the same as before, then the call is 545197210Sqingli * un-necessarily executed here. 546197210Sqingli */ 547197210Sqingli in_ifscrub(ifp, ia); 5481541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 54985740Sdes ia->ia_sockmask.sin_family = AF_INET; 5501541Srgrimes ia->ia_subnetmask = 5511541Srgrimes ntohl(ia->ia_sockmask.sin_addr.s_addr); 5521541Srgrimes maskIsNew = 1; 5531541Srgrimes } 5541541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 5551541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 556197210Sqingli in_ifscrub(ifp, ia); 5571541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 5581541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 5591541Srgrimes } 5601541Srgrimes if (ifra->ifra_addr.sin_family == AF_INET && 5611541Srgrimes (hostIsNew || maskIsNew)) 5621541Srgrimes error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 56387124Sbrian if (error != 0 && iaIsNew) 564201811Sqingli break; 56587124Sbrian 5661541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 5671541Srgrimes (ifra->ifra_broadaddr.sin_family == AF_INET)) 5681541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 569168032Sbms if (error == 0) { 570189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 571189592Sbms if (iaIsFirst && 572189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 573189592Sbms error = in_joingroup(ifp, &allhosts_addr, 574189592Sbms NULL, &ii->ii_allhosts); 575189592Sbms } 576126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 577168032Sbms } 578194760Srwatson goto out; 5791541Srgrimes 5801541Srgrimes case SIOCDIFADDR: 58174299Sru /* 58274299Sru * in_ifscrub kills the interface route. 58374299Sru */ 5841541Srgrimes in_ifscrub(ifp, ia); 585191500Srwatson 58615092Sdg /* 58774299Sru * in_ifadown gets rid of all the rest of 58874299Sru * the routes. This is not quite the right 58974299Sru * thing to do, but at least if we are running 59074299Sru * a routing process they will come back. 59174299Sru */ 59276469Sru in_ifadown(&ia->ia_ifa, 1); 593126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 59487124Sbrian error = 0; 5951541Srgrimes break; 5961541Srgrimes 5971541Srgrimes default: 598191443Srwatson panic("in_control: unsupported ioctl"); 5991541Srgrimes } 60087124Sbrian 601191285Srwatson IF_ADDR_LOCK(ifp); 602213932Sbz /* Re-check that ia is still part of the list. */ 603213932Sbz TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 604213932Sbz if (ifa == &ia->ia_ifa) 605213932Sbz break; 606213932Sbz } 607213932Sbz if (ifa == NULL) { 608213932Sbz /* 609213932Sbz * If we lost the race with another thread, there is no need to 610213932Sbz * try it again for the next loop as there is no other exit 611213932Sbz * path between here and out. 612213932Sbz */ 613213932Sbz IF_ADDR_UNLOCK(ifp); 614213932Sbz error = EADDRNOTAVAIL; 615213932Sbz goto out; 616213932Sbz } 617191285Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 618191285Srwatson IF_ADDR_UNLOCK(ifp); 619194760Srwatson ifa_free(&ia->ia_ifa); /* if_addrhead */ 620194951Srwatson 621194951Srwatson IN_IFADDR_WLOCK(); 622181803Sbz TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 623168032Sbms if (ia->ia_addr.sin_family == AF_INET) { 624194760Srwatson struct in_ifaddr *if_ia; 625194760Srwatson 626154777Sandre LIST_REMOVE(ia, ia_hash); 627194951Srwatson IN_IFADDR_WUNLOCK(); 628168032Sbms /* 629168032Sbms * If this is the last IPv4 address configured on this 630168032Sbms * interface, leave the all-hosts group. 631189592Sbms * No state-change report need be transmitted. 632168032Sbms */ 633194760Srwatson if_ia = NULL; 634194760Srwatson IFP_TO_IA(ifp, if_ia); 635194760Srwatson if (if_ia == NULL) { 636189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 637168032Sbms IN_MULTI_LOCK(); 638189592Sbms if (ii->ii_allhosts) { 639189592Sbms (void)in_leavegroup_locked(ii->ii_allhosts, 640189592Sbms NULL); 641189592Sbms ii->ii_allhosts = NULL; 642189592Sbms } 643168032Sbms IN_MULTI_UNLOCK(); 644194760Srwatson } else 645194760Srwatson ifa_free(&if_ia->ia_ifa); 646194951Srwatson } else 647194951Srwatson IN_IFADDR_WUNLOCK(); 648194951Srwatson ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 649194760Srwatsonout: 650194760Srwatson if (ia != NULL) 651194760Srwatson ifa_free(&ia->ia_ifa); 65287124Sbrian return (error); 6531541Srgrimes} 6541541Srgrimes 6551541Srgrimes/* 65655009Sshin * SIOC[GAD]LIFADDR. 65755009Sshin * SIOCGLIFADDR: get first address. (?!?) 65855009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 65955009Sshin * get first address that matches the specified prefix. 66055009Sshin * SIOCALIFADDR: add the specified address. 66155009Sshin * SIOCALIFADDR with IFLR_PREFIX: 66255009Sshin * EINVAL since we can't deduce hostid part of the address. 66355009Sshin * SIOCDLIFADDR: delete the specified address. 66455009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 66555009Sshin * delete the first address that matches the specified prefix. 66655009Sshin * return values: 66755009Sshin * EINVAL on invalid parameters 66855009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 66955009Sshin * other values may be returned from in_ioctl() 67055009Sshin */ 67155009Sshinstatic int 672169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 673169454Srwatson struct ifnet *ifp, struct thread *td) 67455009Sshin{ 67555009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 67655009Sshin struct ifaddr *ifa; 67755009Sshin 67855009Sshin /* sanity checks */ 679184295Sbz if (data == NULL || ifp == NULL) { 68055009Sshin panic("invalid argument to in_lifaddr_ioctl"); 68155009Sshin /*NOTRECHED*/ 68255009Sshin } 68355009Sshin 68455009Sshin switch (cmd) { 68555009Sshin case SIOCGLIFADDR: 68655009Sshin /* address must be specified on GET with IFLR_PREFIX */ 68755009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 68855009Sshin break; 68955009Sshin /*FALLTHROUGH*/ 69055009Sshin case SIOCALIFADDR: 69155009Sshin case SIOCDLIFADDR: 69255009Sshin /* address must be specified on ADD and DELETE */ 69355917Sshin if (iflr->addr.ss_family != AF_INET) 694184295Sbz return (EINVAL); 69555917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 696184295Sbz return (EINVAL); 69755009Sshin /* XXX need improvement */ 69855917Sshin if (iflr->dstaddr.ss_family 69955917Sshin && iflr->dstaddr.ss_family != AF_INET) 700184295Sbz return (EINVAL); 70155917Sshin if (iflr->dstaddr.ss_family 70255917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 703184295Sbz return (EINVAL); 70455009Sshin break; 70555009Sshin default: /*shouldn't happen*/ 706184295Sbz return (EOPNOTSUPP); 70755009Sshin } 70855009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 709184295Sbz return (EINVAL); 71055009Sshin 71155009Sshin switch (cmd) { 71255009Sshin case SIOCALIFADDR: 71355009Sshin { 71455009Sshin struct in_aliasreq ifra; 71555009Sshin 71655009Sshin if (iflr->flags & IFLR_PREFIX) 717184295Sbz return (EINVAL); 71855009Sshin 71955009Sshin /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 72055009Sshin bzero(&ifra, sizeof(ifra)); 72155009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 72255009Sshin sizeof(ifra.ifra_name)); 72355009Sshin 72455917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 72555009Sshin 72655917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 72755009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 72855917Sshin iflr->dstaddr.ss_len); 72955009Sshin } 73055009Sshin 73155009Sshin ifra.ifra_mask.sin_family = AF_INET; 73255009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 73355009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 73455009Sshin 735184295Sbz return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 73655009Sshin } 73755009Sshin case SIOCGLIFADDR: 73855009Sshin case SIOCDLIFADDR: 73955009Sshin { 74055009Sshin struct in_ifaddr *ia; 74155009Sshin struct in_addr mask, candidate, match; 74255009Sshin struct sockaddr_in *sin; 74355009Sshin 74455009Sshin bzero(&mask, sizeof(mask)); 745170855Smjacob bzero(&match, sizeof(match)); 74655009Sshin if (iflr->flags & IFLR_PREFIX) { 74755009Sshin /* lookup a prefix rather than address. */ 74855009Sshin in_len2mask(&mask, iflr->prefixlen); 74955009Sshin 75055009Sshin sin = (struct sockaddr_in *)&iflr->addr; 75155009Sshin match.s_addr = sin->sin_addr.s_addr; 75255009Sshin match.s_addr &= mask.s_addr; 75355009Sshin 75455009Sshin /* if you set extra bits, that's wrong */ 75555009Sshin if (match.s_addr != sin->sin_addr.s_addr) 756184295Sbz return (EINVAL); 75755009Sshin 75855009Sshin } else { 759170855Smjacob /* on getting an address, take the 1st match */ 760170855Smjacob /* on deleting an address, do exact match */ 761170855Smjacob if (cmd != SIOCGLIFADDR) { 76255009Sshin in_len2mask(&mask, 32); 76355009Sshin sin = (struct sockaddr_in *)&iflr->addr; 76455009Sshin match.s_addr = sin->sin_addr.s_addr; 76555009Sshin } 76655009Sshin } 76755009Sshin 76855009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 76955009Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 77055009Sshin continue; 771170855Smjacob if (match.s_addr == 0) 77255009Sshin break; 77355009Sshin candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 77455009Sshin candidate.s_addr &= mask.s_addr; 77555009Sshin if (candidate.s_addr == match.s_addr) 77655009Sshin break; 77755009Sshin } 778184295Sbz if (ifa == NULL) 779184295Sbz return (EADDRNOTAVAIL); 78055009Sshin ia = (struct in_ifaddr *)ifa; 78155009Sshin 78255009Sshin if (cmd == SIOCGLIFADDR) { 78355009Sshin /* fill in the if_laddrreq structure */ 78455009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 78555009Sshin 78655009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 78755009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 78855009Sshin ia->ia_dstaddr.sin_len); 78955009Sshin } else 79055009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 79155009Sshin 79255009Sshin iflr->prefixlen = 79355009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 79455009Sshin 79555009Sshin iflr->flags = 0; /*XXX*/ 79655009Sshin 797184295Sbz return (0); 79855009Sshin } else { 79955009Sshin struct in_aliasreq ifra; 80055009Sshin 80155009Sshin /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 80255009Sshin bzero(&ifra, sizeof(ifra)); 80355009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 80455009Sshin sizeof(ifra.ifra_name)); 80555009Sshin 80655009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 80755009Sshin ia->ia_addr.sin_len); 80855009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 80955009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 81055009Sshin ia->ia_dstaddr.sin_len); 81155009Sshin } 81255009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 81355009Sshin ia->ia_sockmask.sin_len); 81455009Sshin 815184295Sbz return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 816184295Sbz ifp, td)); 81755009Sshin } 81855009Sshin } 81955009Sshin } 82055009Sshin 821184295Sbz return (EOPNOTSUPP); /*just for safety*/ 82255009Sshin} 82355009Sshin 82455009Sshin/* 8251541Srgrimes * Delete any existing route for an interface. 8261541Srgrimes */ 82722672Swollmanvoid 828169454Srwatsonin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) 8291541Srgrimes{ 830169454Srwatson 831137628Smlaier in_scrubprefix(ia); 8321541Srgrimes} 8331541Srgrimes 8341541Srgrimes/* 8351541Srgrimes * Initialize an interface's internet address 8361541Srgrimes * and routing table entry. 8371541Srgrimes */ 83812296Sphkstatic int 839169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 840169454Srwatson int scrub) 8411541Srgrimes{ 8421541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 8431541Srgrimes struct sockaddr_in oldaddr; 84494326Sbrian int s = splimp(), flags = RTF_UP, error = 0; 8451541Srgrimes 8461541Srgrimes oldaddr = ia->ia_addr; 847105748Ssuz if (oldaddr.sin_family == AF_INET) 848105748Ssuz LIST_REMOVE(ia, ia_hash); 8491541Srgrimes ia->ia_addr = *sin; 850194951Srwatson if (ia->ia_addr.sin_family == AF_INET) { 851194951Srwatson IN_IFADDR_WLOCK(); 852105748Ssuz LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 853105748Ssuz ia, ia_hash); 854194951Srwatson IN_IFADDR_WUNLOCK(); 855194951Srwatson } 8561541Srgrimes /* 8571541Srgrimes * Give the interface a chance to initialize 8581541Srgrimes * if this is its first address, 8591541Srgrimes * and to validate the address if necessary. 8601541Srgrimes */ 861184295Sbz if (ifp->if_ioctl != NULL) { 862146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 863146883Siedowse if (error) { 864146883Siedowse splx(s); 865146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 866146883Siedowse ia->ia_addr = oldaddr; 867194951Srwatson IN_IFADDR_WLOCK(); 868146883Siedowse if (ia->ia_addr.sin_family == AF_INET) 869146883Siedowse LIST_INSERT_HEAD(INADDR_HASH( 870146883Siedowse ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 871179971Sgonzo else 872179971Sgonzo /* 873179971Sgonzo * If oldaddr family is not AF_INET (e.g. 874179971Sgonzo * interface has been just created) in_control 875179971Sgonzo * does not call LIST_REMOVE, and we end up 876179971Sgonzo * with bogus ia entries in hash 877179971Sgonzo */ 878179971Sgonzo LIST_REMOVE(ia, ia_hash); 879194951Srwatson IN_IFADDR_WUNLOCK(); 880146883Siedowse return (error); 881146883Siedowse } 8821541Srgrimes } 8831541Srgrimes splx(s); 8841541Srgrimes if (scrub) { 8851541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 8861541Srgrimes in_ifscrub(ifp, ia); 8871541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 8881541Srgrimes } 8891541Srgrimes if (IN_CLASSA(i)) 8901541Srgrimes ia->ia_netmask = IN_CLASSA_NET; 8911541Srgrimes else if (IN_CLASSB(i)) 8921541Srgrimes ia->ia_netmask = IN_CLASSB_NET; 8931541Srgrimes else 8941541Srgrimes ia->ia_netmask = IN_CLASSC_NET; 8951541Srgrimes /* 8961541Srgrimes * The subnet mask usually includes at least the standard network part, 8971541Srgrimes * but may may be smaller in the case of supernetting. 8981541Srgrimes * If it is set, we believe it. 8991541Srgrimes */ 9001541Srgrimes if (ia->ia_subnetmask == 0) { 9011541Srgrimes ia->ia_subnetmask = ia->ia_netmask; 9021541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 9031541Srgrimes } else 9041541Srgrimes ia->ia_netmask &= ia->ia_subnetmask; 9051541Srgrimes ia->ia_net = i & ia->ia_netmask; 9061541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 9071541Srgrimes in_socktrim(&ia->ia_sockmask); 9081541Srgrimes /* 909143868Sglebius * XXX: carp(4) does not have interface route 910143868Sglebius */ 911143868Sglebius if (ifp->if_type == IFT_CARP) 912143868Sglebius return (0); 913143868Sglebius /* 9141541Srgrimes * Add route for the network. 9151541Srgrimes */ 9161541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 9171541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 9181541Srgrimes ia->ia_broadaddr.sin_addr.s_addr = 9191541Srgrimes htonl(ia->ia_subnet | ~ia->ia_subnetmask); 9201541Srgrimes ia->ia_netbroadcast.s_addr = 9211541Srgrimes htonl(ia->ia_net | ~ ia->ia_netmask); 9221541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 923137833Smlaier ia->ia_dstaddr = ia->ia_addr; 9241541Srgrimes flags |= RTF_HOST; 9251541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 9261541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 9271541Srgrimes return (0); 9281541Srgrimes flags |= RTF_HOST; 9291541Srgrimes } 930137628Smlaier if ((error = in_addprefix(ia, flags)) != 0) 931137628Smlaier return (error); 93294326Sbrian 933192085Sqingli if (ia->ia_addr.sin_addr.s_addr == INADDR_ANY) 934192085Sqingli return (0); 935192085Sqingli 936203401Sqingli if (ifp->if_flags & IFF_POINTOPOINT) { 937203401Sqingli if (ia->ia_dstaddr.sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 938203401Sqingli return (0); 939203401Sqingli } 940203401Sqingli 941203401Sqingli 942192011Sqingli /* 943192011Sqingli * add a loopback route to self 944192011Sqingli */ 945201282Sqingli if (V_useloopback && !(ifp->if_flags & IFF_LOOPBACK)) { 946201282Sqingli struct route ia_ro; 947201282Sqingli 948201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 949201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = ia->ia_addr; 950201282Sqingli rtalloc_ign_fib(&ia_ro, 0, 0); 951201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 952201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 953201282Sqingli RT_LOCK(ia_ro.ro_rt); 954201282Sqingli RT_ADDREF(ia_ro.ro_rt); 955201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 956201282Sqingli } else 957201282Sqingli error = ifa_add_loopback_route((struct ifaddr *)ia, 958197227Sqingli (struct sockaddr *)&ia->ia_addr); 959201282Sqingli if (error == 0) 960201282Sqingli ia->ia_flags |= IFA_RTSELF; 961201282Sqingli if (ia_ro.ro_rt != NULL) 962201282Sqingli RTFREE(ia_ro.ro_rt); 963201282Sqingli } 964192011Sqingli 9651541Srgrimes return (error); 9661541Srgrimes} 9671541Srgrimes 968137628Smlaier#define rtinitflags(x) \ 969137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 970137628Smlaier ? RTF_HOST : 0) 971201285Sqingli 972137628Smlaier/* 973201285Sqingli * Generate a routing message when inserting or deleting 974201285Sqingli * an interface address alias. 975201285Sqingli */ 976201285Sqinglistatic void in_addralias_rtmsg(int cmd, struct in_addr *prefix, 977201285Sqingli struct in_ifaddr *target) 978201285Sqingli{ 979201285Sqingli struct route pfx_ro; 980201285Sqingli struct sockaddr_in *pfx_addr; 981201285Sqingli struct rtentry msg_rt; 982201285Sqingli 983201285Sqingli /* QL: XXX 984201285Sqingli * This is a bit questionable because there is no 985201285Sqingli * additional route entry added/deleted for an address 986201285Sqingli * alias. Therefore this route report is inaccurate. 987201285Sqingli */ 988201285Sqingli bzero(&pfx_ro, sizeof(pfx_ro)); 989201285Sqingli pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); 990201285Sqingli pfx_addr->sin_len = sizeof(*pfx_addr); 991201285Sqingli pfx_addr->sin_family = AF_INET; 992201285Sqingli pfx_addr->sin_addr = *prefix; 993201285Sqingli rtalloc_ign_fib(&pfx_ro, 0, 0); 994201285Sqingli if (pfx_ro.ro_rt != NULL) { 995201285Sqingli msg_rt = *pfx_ro.ro_rt; 996201285Sqingli 997201285Sqingli /* QL: XXX 998201285Sqingli * Point the gateway to the new interface 999201285Sqingli * address as if a new prefix route entry has 1000201285Sqingli * been added through the new address alias. 1001201285Sqingli * All other parts of the rtentry is accurate, 1002201285Sqingli * e.g., rt_key, rt_mask, rt_ifp etc. 1003201285Sqingli */ 1004201285Sqingli msg_rt.rt_gateway = 1005201285Sqingli (struct sockaddr *)&target->ia_addr; 1006201285Sqingli rt_newaddrmsg(cmd, 1007201285Sqingli (struct ifaddr *)target, 1008201285Sqingli 0, &msg_rt); 1009201285Sqingli RTFREE(pfx_ro.ro_rt); 1010201285Sqingli } 1011201285Sqingli return; 1012201285Sqingli} 1013201285Sqingli 1014201285Sqingli/* 1015170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 1016137628Smlaier */ 1017137628Smlaierstatic int 1018169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 1019137628Smlaier{ 1020137628Smlaier struct in_ifaddr *ia; 1021151555Sglebius struct in_addr prefix, mask, p, m; 1022137628Smlaier int error; 10231541Srgrimes 1024170855Smjacob if ((flags & RTF_HOST) != 0) { 1025137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1026170855Smjacob mask.s_addr = 0; 1027170855Smjacob } else { 1028137628Smlaier prefix = target->ia_addr.sin_addr; 1029137628Smlaier mask = target->ia_sockmask.sin_addr; 1030137628Smlaier prefix.s_addr &= mask.s_addr; 1031137628Smlaier } 1032137628Smlaier 1033194951Srwatson IN_IFADDR_RLOCK(); 1034181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1035151555Sglebius if (rtinitflags(ia)) { 1036137628Smlaier p = ia->ia_addr.sin_addr; 1037151555Sglebius 1038151555Sglebius if (prefix.s_addr != p.s_addr) 1039151555Sglebius continue; 1040151555Sglebius } else { 1041151555Sglebius p = ia->ia_addr.sin_addr; 1042151555Sglebius m = ia->ia_sockmask.sin_addr; 1043151555Sglebius p.s_addr &= m.s_addr; 1044151555Sglebius 1045151555Sglebius if (prefix.s_addr != p.s_addr || 1046151555Sglebius mask.s_addr != m.s_addr) 1047151555Sglebius continue; 1048137628Smlaier } 1049137628Smlaier 1050137628Smlaier /* 1051137628Smlaier * If we got a matching prefix route inserted by other 1052137628Smlaier * interface address, we are done here. 1053137628Smlaier */ 1054149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 1055204902Sqingli#ifdef RADIX_MPATH 1056204902Sqingli if (ia->ia_addr.sin_addr.s_addr == 1057212209Sbz target->ia_addr.sin_addr.s_addr) { 1058212209Sbz IN_IFADDR_RUNLOCK(); 1059204902Sqingli return (EEXIST); 1060212209Sbz } else 1061204902Sqingli break; 1062204902Sqingli#endif 1063181803Sbz if (V_sameprefixcarponly && 1064149221Sglebius target->ia_ifp->if_type != IFT_CARP && 1065194951Srwatson ia->ia_ifp->if_type != IFT_CARP) { 1066194951Srwatson IN_IFADDR_RUNLOCK(); 1067149221Sglebius return (EEXIST); 1068194951Srwatson } else { 1069201285Sqingli in_addralias_rtmsg(RTM_ADD, &prefix, target); 1070194951Srwatson IN_IFADDR_RUNLOCK(); 1071149221Sglebius return (0); 1072194951Srwatson } 1073149221Sglebius } 1074137628Smlaier } 1075194951Srwatson IN_IFADDR_RUNLOCK(); 1076137628Smlaier 1077137628Smlaier /* 1078137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 1079137628Smlaier */ 1080137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 1081137628Smlaier if (!error) 1082137628Smlaier target->ia_flags |= IFA_ROUTE; 1083184295Sbz return (error); 1084137628Smlaier} 1085137628Smlaier 1086186119Sqingliextern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); 1087186119Sqingli 10881541Srgrimes/* 1089137628Smlaier * If there is no other address in the system that can serve a route to the 1090137628Smlaier * same prefix, remove the route. Hand over the route to the new address 1091137628Smlaier * otherwise. 1092137628Smlaier */ 1093137628Smlaierstatic int 1094169454Srwatsonin_scrubprefix(struct in_ifaddr *target) 1095137628Smlaier{ 1096137628Smlaier struct in_ifaddr *ia; 1097137628Smlaier struct in_addr prefix, mask, p; 1098201282Sqingli int error = 0; 1099192476Sqingli struct sockaddr_in prefix0, mask0; 1100137628Smlaier 1101195914Sqingli /* 1102195914Sqingli * Remove the loopback route to the interface address. 1103195914Sqingli * The "useloopback" setting is not consulted because if the 1104195914Sqingli * user configures an interface address, turns off this 1105195914Sqingli * setting, and then tries to delete that interface address, 1106195914Sqingli * checking the current setting of "useloopback" would leave 1107195914Sqingli * that interface address loopback route untouched, which 1108195914Sqingli * would be wrong. Therefore the interface address loopback route 1109195914Sqingli * deletion is unconditional. 1110195914Sqingli */ 1111192085Sqingli if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && 1112201282Sqingli !(target->ia_ifp->if_flags & IFF_LOOPBACK) && 1113201282Sqingli (target->ia_flags & IFA_RTSELF)) { 1114201282Sqingli struct route ia_ro; 1115201282Sqingli int freeit = 0; 1116201282Sqingli 1117201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 1118201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = target->ia_addr; 1119201282Sqingli rtalloc_ign_fib(&ia_ro, 0, 0); 1120201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 1121201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 1122201282Sqingli RT_LOCK(ia_ro.ro_rt); 1123201282Sqingli if (ia_ro.ro_rt->rt_refcnt <= 1) 1124201282Sqingli freeit = 1; 1125201282Sqingli else 1126201282Sqingli RT_REMREF(ia_ro.ro_rt); 1127201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 1128201282Sqingli } 1129201282Sqingli if (freeit) 1130201282Sqingli error = ifa_del_loopback_route((struct ifaddr *)target, 1131197227Sqingli (struct sockaddr *)&target->ia_addr); 1132201282Sqingli if (error == 0) 1133201282Sqingli target->ia_flags &= ~IFA_RTSELF; 1134197695Sqingli /* remove arp cache */ 1135197695Sqingli arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 1136192011Sqingli } 1137192011Sqingli 1138137628Smlaier if (rtinitflags(target)) 1139137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1140137628Smlaier else { 1141137628Smlaier prefix = target->ia_addr.sin_addr; 1142137628Smlaier mask = target->ia_sockmask.sin_addr; 1143137628Smlaier prefix.s_addr &= mask.s_addr; 1144137628Smlaier } 1145137628Smlaier 1146201285Sqingli if ((target->ia_flags & IFA_ROUTE) == 0) { 1147201285Sqingli in_addralias_rtmsg(RTM_DELETE, &prefix, target); 1148201285Sqingli return (0); 1149201285Sqingli } 1150201285Sqingli 1151194951Srwatson IN_IFADDR_RLOCK(); 1152181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1153137628Smlaier if (rtinitflags(ia)) 1154137628Smlaier p = ia->ia_dstaddr.sin_addr; 1155137628Smlaier else { 1156137628Smlaier p = ia->ia_addr.sin_addr; 1157137628Smlaier p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 1158137628Smlaier } 1159137628Smlaier 1160137628Smlaier if (prefix.s_addr != p.s_addr) 1161137628Smlaier continue; 1162137628Smlaier 1163137628Smlaier /* 1164137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 1165137628Smlaier * the route itself to it. Make sure that routing daemons 1166137628Smlaier * get a heads-up. 1167143868Sglebius * 1168211157Swill * XXX: a special case for carp(4) interface - this should 1169211157Swill * be more generally specified as an interface that 1170211157Swill * doesn't support such action. 1171137628Smlaier */ 1172143868Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0 1173143868Sglebius && (ia->ia_ifp->if_type != IFT_CARP) 1174143868Sglebius ) { 1175194951Srwatson IN_IFADDR_RUNLOCK(); 1176137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, 1177137628Smlaier rtinitflags(target)); 1178137628Smlaier target->ia_flags &= ~IFA_ROUTE; 1179137628Smlaier 1180137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 1181137628Smlaier rtinitflags(ia) | RTF_UP); 1182137628Smlaier if (error == 0) 1183137628Smlaier ia->ia_flags |= IFA_ROUTE; 1184184295Sbz return (error); 1185137628Smlaier } 1186137628Smlaier } 1187194951Srwatson IN_IFADDR_RUNLOCK(); 1188137628Smlaier 1189137628Smlaier /* 1190192476Sqingli * remove all L2 entries on the given prefix 1191192476Sqingli */ 1192192476Sqingli bzero(&prefix0, sizeof(prefix0)); 1193192476Sqingli prefix0.sin_len = sizeof(prefix0); 1194192476Sqingli prefix0.sin_family = AF_INET; 1195192476Sqingli prefix0.sin_addr.s_addr = target->ia_subnet; 1196192476Sqingli bzero(&mask0, sizeof(mask0)); 1197192476Sqingli mask0.sin_len = sizeof(mask0); 1198192476Sqingli mask0.sin_family = AF_INET; 1199192476Sqingli mask0.sin_addr.s_addr = target->ia_subnetmask; 1200192476Sqingli lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, 1201192476Sqingli (struct sockaddr *)&mask0); 1202192476Sqingli 1203192476Sqingli /* 1204137628Smlaier * As no-one seem to have this prefix, we can remove the route. 1205137628Smlaier */ 1206137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 1207137628Smlaier target->ia_flags &= ~IFA_ROUTE; 1208184295Sbz return (0); 1209137628Smlaier} 1210137628Smlaier 1211137628Smlaier#undef rtinitflags 1212137628Smlaier 1213137628Smlaier/* 12141541Srgrimes * Return 1 if the address might be a local broadcast address. 12151541Srgrimes */ 12161549Srgrimesint 1217169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 12181541Srgrimes{ 12191541Srgrimes register struct ifaddr *ifa; 12201541Srgrimes u_long t; 12211541Srgrimes 12221541Srgrimes if (in.s_addr == INADDR_BROADCAST || 12231541Srgrimes in.s_addr == INADDR_ANY) 1224184295Sbz return (1); 12251541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 1226184295Sbz return (0); 12271541Srgrimes t = ntohl(in.s_addr); 12281541Srgrimes /* 12291541Srgrimes * Look through the list of addresses for a match 12301541Srgrimes * with a broadcast address. 12311541Srgrimes */ 12321541Srgrimes#define ia ((struct in_ifaddr *)ifa) 123374362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 12341541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 12351541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 12361541Srgrimes in.s_addr == ia->ia_netbroadcast.s_addr || 12371541Srgrimes /* 12381541Srgrimes * Check for old-style (host 0) broadcast. 12391541Srgrimes */ 124013351Sguido t == ia->ia_subnet || t == ia->ia_net) && 124113351Sguido /* 124213351Sguido * Check for an all one subnetmask. These 124313351Sguido * only exist when an interface gets a secondary 124413351Sguido * address. 124513351Sguido */ 124613351Sguido ia->ia_subnetmask != (u_long)0xffffffff) 1247184295Sbz return (1); 12481541Srgrimes return (0); 12491541Srgrimes#undef ia 12501541Srgrimes} 1251167729Sbms 12521541Srgrimes/* 1253189592Sbms * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1254189592Sbms */ 1255189592Sbmsvoid 1256189592Sbmsin_ifdetach(struct ifnet *ifp) 1257189592Sbms{ 1258189592Sbms 1259189592Sbms in_pcbpurgeif0(&V_ripcbinfo, ifp); 1260189592Sbms in_pcbpurgeif0(&V_udbinfo, ifp); 1261189592Sbms in_purgemaddrs(ifp); 1262189592Sbms} 1263189592Sbms 1264189592Sbms/* 1265167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 1266167729Sbms * multicast address records, associated with ifp. 1267189592Sbms * XXX It looks like domifdetach runs AFTER the link layer cleanup. 1268189931Sbms * XXX This should not race with ifma_protospec being set during 1269189931Sbms * a new allocation, if it does, we have bigger problems. 1270162718Sbms */ 1271167729Sbmsstatic void 1272167729Sbmsin_purgemaddrs(struct ifnet *ifp) 1273162718Sbms{ 1274189592Sbms LIST_HEAD(,in_multi) purgeinms; 1275189592Sbms struct in_multi *inm, *tinm; 1276189592Sbms struct ifmultiaddr *ifma; 1277162718Sbms 1278189592Sbms LIST_INIT(&purgeinms); 1279162718Sbms IN_MULTI_LOCK(); 1280189592Sbms 1281189592Sbms /* 1282189592Sbms * Extract list of in_multi associated with the detaching ifp 1283189592Sbms * which the PF_INET layer is about to release. 1284189592Sbms * We need to do this as IF_ADDR_LOCK() may be re-acquired 1285189592Sbms * by code further down. 1286189592Sbms */ 1287189592Sbms IF_ADDR_LOCK(ifp); 1288189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1289189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 1290189931Sbms ifma->ifma_protospec == NULL) 1291189592Sbms continue; 1292189931Sbms#if 0 1293189931Sbms KASSERT(ifma->ifma_protospec != NULL, 1294189931Sbms ("%s: ifma_protospec is NULL", __func__)); 1295189931Sbms#endif 1296189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 1297189592Sbms LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 1298162718Sbms } 1299189592Sbms IF_ADDR_UNLOCK(ifp); 1300150296Srwatson 1301189592Sbms LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 1302191476Srwatson LIST_REMOVE(inm, inm_link); 1303189592Sbms inm_release_locked(inm); 1304189592Sbms } 1305189592Sbms igmp_ifdetach(ifp); 1306150296Srwatson 1307189592Sbms IN_MULTI_UNLOCK(); 1308150296Srwatson} 1309186119Sqingli 1310186119Sqingli#include <net/if_dl.h> 1311186119Sqingli#include <netinet/if_ether.h> 1312186119Sqingli 1313186119Sqinglistruct in_llentry { 1314186119Sqingli struct llentry base; 1315186119Sqingli struct sockaddr_in l3_addr4; 1316186119Sqingli}; 1317186119Sqingli 1318186119Sqinglistatic struct llentry * 1319186119Sqingliin_lltable_new(const struct sockaddr *l3addr, u_int flags) 1320186119Sqingli{ 1321186119Sqingli struct in_llentry *lle; 1322186119Sqingli 1323186119Sqingli lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); 1324186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 1325186119Sqingli return NULL; 1326186119Sqingli 1327186119Sqingli callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); 1328186119Sqingli /* 1329186119Sqingli * For IPv4 this will trigger "arpresolve" to generate 1330186119Sqingli * an ARP request. 1331186119Sqingli */ 1332186119Sqingli lle->base.la_expire = time_second; /* mark expired */ 1333186119Sqingli lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1334186119Sqingli lle->base.lle_refcnt = 1; 1335186119Sqingli LLE_LOCK_INIT(&lle->base); 1336186119Sqingli return &lle->base; 1337186119Sqingli} 1338186119Sqingli 1339186119Sqingli/* 1340186119Sqingli * Deletes an address from the address table. 1341186119Sqingli * This function is called by the timer functions 1342186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 1343186119Sqingli * the caller does the locking. 1344186119Sqingli */ 1345186119Sqinglistatic void 1346186119Sqingliin_lltable_free(struct lltable *llt, struct llentry *lle) 1347186119Sqingli{ 1348186150Skmacy LLE_WUNLOCK(lle); 1349186150Skmacy LLE_LOCK_DESTROY(lle); 1350186119Sqingli free(lle, M_LLTABLE); 1351186119Sqingli} 1352186119Sqingli 1353192476Sqingli 1354192476Sqingli#define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 1355192476Sqingli (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) 1356192476Sqingli 1357192476Sqinglistatic void 1358192476Sqingliin_lltable_prefix_free(struct lltable *llt, 1359192476Sqingli const struct sockaddr *prefix, 1360192476Sqingli const struct sockaddr *mask) 1361192476Sqingli{ 1362192476Sqingli const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; 1363192476Sqingli const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; 1364192476Sqingli struct llentry *lle, *next; 1365192476Sqingli register int i; 1366192476Sqingli 1367192476Sqingli for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 1368192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 1369192476Sqingli 1370192476Sqingli if (IN_ARE_MASKED_ADDR_EQUAL((struct sockaddr_in *)L3_ADDR(lle), 1371192476Sqingli pfx, msk)) { 1372206481Sbz int canceled; 1373206481Sbz 1374206481Sbz canceled = callout_drain(&lle->la_timer); 1375192476Sqingli LLE_WLOCK(lle); 1376206481Sbz if (canceled) 1377206481Sbz LLE_REMREF(lle); 1378192476Sqingli llentry_free(lle); 1379192476Sqingli } 1380192476Sqingli } 1381192476Sqingli } 1382192476Sqingli} 1383192476Sqingli 1384192476Sqingli 1385186119Sqinglistatic int 1386201282Sqingliin_lltable_rtcheck(struct ifnet *ifp, u_int flags, const struct sockaddr *l3addr) 1387186119Sqingli{ 1388186119Sqingli struct rtentry *rt; 1389186119Sqingli 1390186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1391186119Sqingli ("sin_family %d", l3addr->sa_family)); 1392186119Sqingli 1393186119Sqingli /* XXX rtalloc1 should take a const param */ 1394186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1395208553Sqingli if (rt == NULL || (!(flags & LLE_PUB) && 1396208553Sqingli ((rt->rt_flags & RTF_GATEWAY) || 1397208553Sqingli (rt->rt_ifp != ifp)))) { 1398198418Sqingli#ifdef DIAGNOSTIC 1399186119Sqingli log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1400186119Sqingli inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1401197696Sqingli#endif 1402186119Sqingli if (rt != NULL) 1403186119Sqingli RTFREE_LOCKED(rt); 1404186119Sqingli return (EINVAL); 1405186119Sqingli } 1406186119Sqingli RTFREE_LOCKED(rt); 1407186119Sqingli return 0; 1408186119Sqingli} 1409186119Sqingli 1410186119Sqingli/* 1411186119Sqingli * Return NULL if not found or marked for deletion. 1412186119Sqingli * If found return lle read locked. 1413186119Sqingli */ 1414186119Sqinglistatic struct llentry * 1415186119Sqingliin_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1416186119Sqingli{ 1417186119Sqingli const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1418186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1419186119Sqingli struct llentry *lle; 1420186119Sqingli struct llentries *lleh; 1421186119Sqingli u_int hashkey; 1422186119Sqingli 1423186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 1424186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1425186119Sqingli ("sin_family %d", l3addr->sa_family)); 1426186119Sqingli 1427186119Sqingli hashkey = sin->sin_addr.s_addr; 1428186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1429186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 1430186708Sqingli struct sockaddr_in *sa2 = (struct sockaddr_in *)L3_ADDR(lle); 1431186119Sqingli if (lle->la_flags & LLE_DELETED) 1432186119Sqingli continue; 1433186708Sqingli if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1434186119Sqingli break; 1435186119Sqingli } 1436186119Sqingli if (lle == NULL) { 1437198418Sqingli#ifdef DIAGNOSTIC 1438186119Sqingli if (flags & LLE_DELETE) 1439186119Sqingli log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1440186119Sqingli#endif 1441186119Sqingli if (!(flags & LLE_CREATE)) 1442186119Sqingli return (NULL); 1443186119Sqingli /* 1444186119Sqingli * A route that covers the given address must have 1445186119Sqingli * been installed 1st because we are doing a resolution, 1446186119Sqingli * verify this. 1447186119Sqingli */ 1448186119Sqingli if (!(flags & LLE_IFADDR) && 1449201282Sqingli in_lltable_rtcheck(ifp, flags, l3addr) != 0) 1450186119Sqingli goto done; 1451186119Sqingli 1452186119Sqingli lle = in_lltable_new(l3addr, flags); 1453186119Sqingli if (lle == NULL) { 1454186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1455186119Sqingli goto done; 1456186119Sqingli } 1457186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 1458186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1459186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1460186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 1461186119Sqingli } 1462186119Sqingli 1463186119Sqingli lle->lle_tbl = llt; 1464186119Sqingli lle->lle_head = lleh; 1465186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 1466186119Sqingli } else if (flags & LLE_DELETE) { 1467186119Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1468186119Sqingli LLE_WLOCK(lle); 1469186119Sqingli lle->la_flags = LLE_DELETED; 1470196995Snp EVENTHANDLER_INVOKE(arp_update_event, lle); 1471186119Sqingli LLE_WUNLOCK(lle); 1472198418Sqingli#ifdef DIAGNOSTIC 1473186119Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1474186119Sqingli#endif 1475186119Sqingli } 1476186119Sqingli lle = (void *)-1; 1477186119Sqingli 1478186119Sqingli } 1479186544Sbz if (LLE_IS_VALID(lle)) { 1480186119Sqingli if (flags & LLE_EXCLUSIVE) 1481186119Sqingli LLE_WLOCK(lle); 1482186119Sqingli else 1483186119Sqingli LLE_RLOCK(lle); 1484186119Sqingli } 1485186119Sqinglidone: 1486186119Sqingli return (lle); 1487186119Sqingli} 1488186119Sqingli 1489186119Sqinglistatic int 1490186119Sqingliin_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1491186119Sqingli{ 1492186119Sqingli#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1493186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1494186119Sqingli struct llentry *lle; 1495186119Sqingli /* XXX stack use */ 1496186119Sqingli struct { 1497186119Sqingli struct rt_msghdr rtm; 1498186119Sqingli struct sockaddr_inarp sin; 1499186119Sqingli struct sockaddr_dl sdl; 1500186119Sqingli } arpc; 1501186119Sqingli int error, i; 1502186119Sqingli 1503196535Srwatson LLTABLE_LOCK_ASSERT(); 1504186119Sqingli 1505186119Sqingli error = 0; 1506186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1507186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1508186119Sqingli struct sockaddr_dl *sdl; 1509186119Sqingli 1510186119Sqingli /* skip deleted entries */ 1511198111Sqingli if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 1512186119Sqingli continue; 1513186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 1514188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1515186980Sbz continue; 1516186119Sqingli /* 1517186119Sqingli * produce a msg made of: 1518186119Sqingli * struct rt_msghdr; 1519186119Sqingli * struct sockaddr_inarp; (IPv4) 1520186119Sqingli * struct sockaddr_dl; 1521186119Sqingli */ 1522186119Sqingli bzero(&arpc, sizeof(arpc)); 1523186119Sqingli arpc.rtm.rtm_msglen = sizeof(arpc); 1524186935Sharti arpc.rtm.rtm_version = RTM_VERSION; 1525186935Sharti arpc.rtm.rtm_type = RTM_GET; 1526186935Sharti arpc.rtm.rtm_flags = RTF_UP; 1527186935Sharti arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1528186119Sqingli arpc.sin.sin_family = AF_INET; 1529186119Sqingli arpc.sin.sin_len = sizeof(arpc.sin); 1530186119Sqingli arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1531186119Sqingli 1532186119Sqingli /* publish */ 1533186119Sqingli if (lle->la_flags & LLE_PUB) { 1534186119Sqingli arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1535186119Sqingli /* proxy only */ 1536186119Sqingli if (lle->la_flags & LLE_PROXY) 1537186119Sqingli arpc.sin.sin_other = SIN_PROXY; 1538186119Sqingli } 1539186119Sqingli 1540186119Sqingli sdl = &arpc.sdl; 1541186119Sqingli sdl->sdl_family = AF_LINK; 1542186119Sqingli sdl->sdl_len = sizeof(*sdl); 1543186119Sqingli sdl->sdl_index = ifp->if_index; 1544186119Sqingli sdl->sdl_type = ifp->if_type; 1545198111Sqingli if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 1546198111Sqingli sdl->sdl_alen = ifp->if_addrlen; 1547198111Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1548198111Sqingli } else { 1549198111Sqingli sdl->sdl_alen = 0; 1550198111Sqingli bzero(LLADDR(sdl), ifp->if_addrlen); 1551198111Sqingli } 1552186119Sqingli 1553186119Sqingli arpc.rtm.rtm_rmx.rmx_expire = 1554186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1555186500Sqingli arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1556186119Sqingli if (lle->la_flags & LLE_STATIC) 1557186119Sqingli arpc.rtm.rtm_flags |= RTF_STATIC; 1558186119Sqingli arpc.rtm.rtm_index = ifp->if_index; 1559186119Sqingli error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1560186119Sqingli if (error) 1561186119Sqingli break; 1562186119Sqingli } 1563186119Sqingli } 1564186119Sqingli return error; 1565186119Sqingli#undef SIN 1566186119Sqingli} 1567186119Sqingli 1568186119Sqinglivoid * 1569186119Sqingliin_domifattach(struct ifnet *ifp) 1570189592Sbms{ 1571189592Sbms struct in_ifinfo *ii; 1572189592Sbms struct lltable *llt; 1573189592Sbms 1574189592Sbms ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1575189592Sbms 1576189592Sbms llt = lltable_init(ifp, AF_INET); 1577186119Sqingli if (llt != NULL) { 1578186119Sqingli llt->llt_new = in_lltable_new; 1579186119Sqingli llt->llt_free = in_lltable_free; 1580192476Sqingli llt->llt_prefix_free = in_lltable_prefix_free; 1581186119Sqingli llt->llt_rtcheck = in_lltable_rtcheck; 1582186119Sqingli llt->llt_lookup = in_lltable_lookup; 1583186119Sqingli llt->llt_dump = in_lltable_dump; 1584186119Sqingli } 1585189592Sbms ii->ii_llt = llt; 1586189592Sbms 1587189592Sbms ii->ii_igmp = igmp_domifattach(ifp); 1588189592Sbms 1589189592Sbms return ii; 1590186119Sqingli} 1591186119Sqingli 1592186119Sqinglivoid 1593189592Sbmsin_domifdetach(struct ifnet *ifp, void *aux) 1594186119Sqingli{ 1595189592Sbms struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1596186119Sqingli 1597189592Sbms igmp_domifdetach(ifp); 1598189592Sbms lltable_free(ii->ii_llt); 1599189592Sbms free(ii, M_IFADDR); 1600186119Sqingli} 1601