in.c revision 197210
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 197210 2009-09-15 01:01:03Z qingli $"); 35172467Ssilby 36143868Sglebius#include "opt_carp.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); 79195699Srwatsonstatic VNET_DEFINE(int, sameprefixcarponly); 80195699SrwatsonVNET_DECLARE(struct inpcbinfo, ripcbinfo); 81185088Szec 82195727Srwatson#define V_subnetsarelocal VNET(subnetsarelocal) 83195727Srwatson#define V_sameprefixcarponly VNET(sameprefixcarponly) 84195727Srwatson#define V_ripcbinfo VNET(ripcbinfo) 85195699Srwatson 86195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, 87195699Srwatson &VNET_NAME(subnetsarelocal), 0, 88183550Szec "Treat all subnets as directly connected"); 89195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, 90195699Srwatson &VNET_NAME(sameprefixcarponly), 0, 91149221Sglebius "Refuse to create same prefixes on different interfaces"); 9221666Swollman 931541Srgrimes/* 941541Srgrimes * Return 1 if an internet address is for a ``local'' host 951541Srgrimes * (one to which we have a connection). If subnetsarelocal 961541Srgrimes * is true, this includes other subnets of the local net. 971541Srgrimes * Otherwise, it includes only the directly-connected (sub)nets. 981541Srgrimes */ 991549Srgrimesint 100169454Srwatsonin_localaddr(struct in_addr in) 1011541Srgrimes{ 1021541Srgrimes register u_long i = ntohl(in.s_addr); 1031541Srgrimes register struct in_ifaddr *ia; 1041541Srgrimes 105194951Srwatson IN_IFADDR_RLOCK(); 106181803Sbz if (V_subnetsarelocal) { 107194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 108194951Srwatson if ((i & ia->ia_netmask) == ia->ia_net) { 109194951Srwatson IN_IFADDR_RUNLOCK(); 1101541Srgrimes return (1); 111194951Srwatson } 112194951Srwatson } 1131541Srgrimes } else { 114194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 115194951Srwatson if ((i & ia->ia_subnetmask) == ia->ia_subnet) { 116194951Srwatson IN_IFADDR_RUNLOCK(); 1171541Srgrimes return (1); 118194951Srwatson } 119194951Srwatson } 1201541Srgrimes } 121194951Srwatson IN_IFADDR_RUNLOCK(); 1221541Srgrimes return (0); 1231541Srgrimes} 1241541Srgrimes 1251541Srgrimes/* 126133486Sandre * Return 1 if an internet address is for the local host and configured 127133486Sandre * on one of its interfaces. 128133486Sandre */ 129133486Sandreint 130169454Srwatsonin_localip(struct in_addr in) 131133486Sandre{ 132133486Sandre struct in_ifaddr *ia; 133133486Sandre 134194951Srwatson IN_IFADDR_RLOCK(); 135133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 136194951Srwatson if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { 137194951Srwatson IN_IFADDR_RUNLOCK(); 138184295Sbz return (1); 139194951Srwatson } 140133486Sandre } 141194951Srwatson IN_IFADDR_RUNLOCK(); 142184295Sbz return (0); 143133486Sandre} 144133486Sandre 145133486Sandre/* 1461541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1471541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1481541Srgrimes * may be forwarded. 1491541Srgrimes */ 1501549Srgrimesint 151169454Srwatsonin_canforward(struct in_addr in) 1521541Srgrimes{ 1531541Srgrimes register u_long i = ntohl(in.s_addr); 1541541Srgrimes register u_long net; 1551541Srgrimes 156166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1571541Srgrimes return (0); 1581541Srgrimes if (IN_CLASSA(i)) { 1591541Srgrimes net = i & IN_CLASSA_NET; 1601541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1611541Srgrimes return (0); 1621541Srgrimes } 1631541Srgrimes return (1); 1641541Srgrimes} 1651541Srgrimes 1661541Srgrimes/* 1671541Srgrimes * Trim a mask in a sockaddr 1681541Srgrimes */ 16912296Sphkstatic void 170169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1711541Srgrimes{ 1721541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1731541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1741541Srgrimes 1751541Srgrimes ap->sin_len = 0; 1764127Swollman while (--cp >= cplim) 177133874Srwatson if (*cp) { 1781541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1791541Srgrimes break; 1801541Srgrimes } 1811541Srgrimes} 1821541Srgrimes 18355009Sshinstatic int 18455009Sshinin_mask2len(mask) 18555009Sshin struct in_addr *mask; 18655009Sshin{ 18755009Sshin int x, y; 18855009Sshin u_char *p; 18955009Sshin 19055009Sshin p = (u_char *)mask; 19155009Sshin for (x = 0; x < sizeof(*mask); x++) { 19255009Sshin if (p[x] != 0xff) 19355009Sshin break; 19455009Sshin } 19555009Sshin y = 0; 19655009Sshin if (x < sizeof(*mask)) { 19755009Sshin for (y = 0; y < 8; y++) { 19855009Sshin if ((p[x] & (0x80 >> y)) == 0) 19955009Sshin break; 20055009Sshin } 20155009Sshin } 202184295Sbz return (x * 8 + y); 20355009Sshin} 20455009Sshin 20555009Sshinstatic void 206169454Srwatsonin_len2mask(struct in_addr *mask, int len) 20755009Sshin{ 20855009Sshin int i; 20955009Sshin u_char *p; 21055009Sshin 21155009Sshin p = (u_char *)mask; 21255009Sshin bzero(mask, sizeof(*mask)); 21355009Sshin for (i = 0; i < len / 8; i++) 21455009Sshin p[i] = 0xff; 21555009Sshin if (len % 8) 21655009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 21755009Sshin} 21855009Sshin 2191541Srgrimes/* 2201541Srgrimes * Generic internet control operations (ioctl's). 221191443Srwatson * 222191443Srwatson * ifp is NULL if not an interface-specific ioctl. 2231541Srgrimes */ 2241541Srgrimes/* ARGSUSED */ 2251549Srgrimesint 226169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 227169454Srwatson struct thread *td) 2281541Srgrimes{ 2291541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 230184295Sbz register struct in_ifaddr *ia, *iap; 2311541Srgrimes register struct ifaddr *ifa; 232168032Sbms struct in_addr allhosts_addr; 23384102Sjlemon struct in_addr dst; 234189592Sbms struct in_ifinfo *ii; 2351541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 2361541Srgrimes struct sockaddr_in oldaddr; 237194951Srwatson int error, hostIsNew, iaIsNew, maskIsNew; 238168032Sbms int iaIsFirst; 2391541Srgrimes 240184295Sbz ia = NULL; 241168032Sbms iaIsFirst = 0; 24287124Sbrian iaIsNew = 0; 243168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 24487124Sbrian 245191443Srwatson /* 246191443Srwatson * Filter out ioctls we implement directly; forward the rest on to 247191443Srwatson * in_lifaddr_ioctl() and ifp->if_ioctl(). 248191443Srwatson */ 24955009Sshin switch (cmd) { 250191443Srwatson case SIOCAIFADDR: 251191443Srwatson case SIOCDIFADDR: 252191443Srwatson case SIOCGIFADDR: 253191443Srwatson case SIOCGIFBRDADDR: 254191443Srwatson case SIOCGIFDSTADDR: 255191443Srwatson case SIOCGIFNETMASK: 256191443Srwatson case SIOCSIFADDR: 257191443Srwatson case SIOCSIFBRDADDR: 258191443Srwatson case SIOCSIFDSTADDR: 259191443Srwatson case SIOCSIFNETMASK: 260191443Srwatson break; 261191443Srwatson 26255009Sshin case SIOCALIFADDR: 263164033Srwatson if (td != NULL) { 264164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 265164033Srwatson if (error) 266164033Srwatson return (error); 267164033Srwatson } 268184295Sbz if (ifp == NULL) 269184295Sbz return (EINVAL); 270164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 271164033Srwatson 27255009Sshin case SIOCDLIFADDR: 273164033Srwatson if (td != NULL) { 274164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 275164033Srwatson if (error) 276164033Srwatson return (error); 277164033Srwatson } 278184295Sbz if (ifp == NULL) 279184295Sbz return (EINVAL); 280164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 281164033Srwatson 28255009Sshin case SIOCGLIFADDR: 283184295Sbz if (ifp == NULL) 284184295Sbz return (EINVAL); 28583366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 286191443Srwatson 287191443Srwatson default: 288191443Srwatson if (ifp == NULL || ifp->if_ioctl == NULL) 289191443Srwatson return (EOPNOTSUPP); 290191443Srwatson return ((*ifp->if_ioctl)(ifp, cmd, data)); 29155009Sshin } 29255009Sshin 293191443Srwatson if (ifp == NULL) 294191443Srwatson return (EADDRNOTAVAIL); 295191443Srwatson 2961541Srgrimes /* 297191456Srwatson * Security checks before we get involved in any work. 298191456Srwatson */ 299191456Srwatson switch (cmd) { 300191456Srwatson case SIOCAIFADDR: 301191456Srwatson case SIOCSIFADDR: 302191456Srwatson case SIOCSIFBRDADDR: 303191456Srwatson case SIOCSIFNETMASK: 304191456Srwatson case SIOCSIFDSTADDR: 305191456Srwatson if (td != NULL) { 306191456Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 307191456Srwatson if (error) 308191456Srwatson return (error); 309191456Srwatson } 310191456Srwatson break; 311191456Srwatson 312191456Srwatson case SIOCDIFADDR: 313191456Srwatson if (td != NULL) { 314191456Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 315191456Srwatson if (error) 316191456Srwatson return (error); 317191456Srwatson } 318191456Srwatson break; 319191456Srwatson } 320191456Srwatson 321191456Srwatson /* 3221541Srgrimes * Find address for this interface, if it exists. 32314632Sfenner * 324191443Srwatson * If an alias address was specified, find that one instead of the 325191443Srwatson * first one on the interface, if possible. 3261541Srgrimes */ 327191443Srwatson dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 328194951Srwatson IN_IFADDR_RLOCK(); 329191443Srwatson LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { 330191443Srwatson if (iap->ia_ifp == ifp && 331191443Srwatson iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 332191443Srwatson if (td == NULL || prison_check_ip4(td->td_ucred, 333191443Srwatson &dst) == 0) 334191443Srwatson ia = iap; 335191443Srwatson break; 336191443Srwatson } 337191443Srwatson } 338194760Srwatson if (ia != NULL) 339194760Srwatson ifa_ref(&ia->ia_ifa); 340194951Srwatson IN_IFADDR_RUNLOCK(); 341191443Srwatson if (ia == NULL) { 342194760Srwatson IF_ADDR_LOCK(ifp); 343191443Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 344191443Srwatson iap = ifatoia(ifa); 345191443Srwatson if (iap->ia_addr.sin_family == AF_INET) { 346191443Srwatson if (td != NULL && 347191443Srwatson prison_check_ip4(td->td_ucred, 348191443Srwatson &iap->ia_addr.sin_addr) != 0) 349191443Srwatson continue; 350191443Srwatson ia = iap; 35184102Sjlemon break; 35284102Sjlemon } 353191443Srwatson } 354194760Srwatson if (ia != NULL) 355194760Srwatson ifa_ref(&ia->ia_ifa); 356194760Srwatson IF_ADDR_UNLOCK(ifp); 35784102Sjlemon } 358191443Srwatson if (ia == NULL) 359191443Srwatson iaIsFirst = 1; 3601541Srgrimes 361191500Srwatson error = 0; 3621541Srgrimes switch (cmd) { 3631541Srgrimes case SIOCAIFADDR: 3641541Srgrimes case SIOCDIFADDR: 3658071Swollman if (ifra->ifra_addr.sin_family == AF_INET) { 366194760Srwatson struct in_ifaddr *oia; 367194760Srwatson 368194951Srwatson IN_IFADDR_RLOCK(); 36971999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 3708071Swollman if (ia->ia_ifp == ifp && 3718071Swollman ia->ia_addr.sin_addr.s_addr == 3728071Swollman ifra->ifra_addr.sin_addr.s_addr) 3738071Swollman break; 3748071Swollman } 375194760Srwatson if (ia != NULL && ia != oia) 376194760Srwatson ifa_ref(&ia->ia_ifa); 377194760Srwatson if (oia != NULL && ia != oia) 378194760Srwatson ifa_free(&oia->ia_ifa); 379194951Srwatson IN_IFADDR_RUNLOCK(); 3808876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 3818071Swollman && (cmd == SIOCAIFADDR) 3828071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 3838071Swollman == INADDR_ANY)) { 384191500Srwatson error = EDESTADDRREQ; 385194760Srwatson goto out; 3868071Swollman } 3871541Srgrimes } 388191500Srwatson if (cmd == SIOCDIFADDR && ia == NULL) { 389191500Srwatson error = EADDRNOTAVAIL; 390194760Srwatson goto out; 391191500Srwatson } 3921541Srgrimes /* FALLTHROUGH */ 3931541Srgrimes case SIOCSIFADDR: 3941541Srgrimes case SIOCSIFNETMASK: 3951541Srgrimes case SIOCSIFDSTADDR: 396184295Sbz if (ia == NULL) { 39720407Swollman ia = (struct in_ifaddr *) 398191500Srwatson malloc(sizeof *ia, M_IFADDR, M_NOWAIT | 399191500Srwatson M_ZERO); 400191500Srwatson if (ia == NULL) { 401191500Srwatson error = ENOBUFS; 402194760Srwatson goto out; 403191500Srwatson } 404191500Srwatson 40520407Swollman ifa = &ia->ia_ifa; 406194602Srwatson ifa_init(ifa); 40720407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 40820407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 40920407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 410108033Shsu 4111541Srgrimes ia->ia_sockmask.sin_len = 8; 41285740Sdes ia->ia_sockmask.sin_family = AF_INET; 4131541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 4141541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 4151541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 4161541Srgrimes } 4171541Srgrimes ia->ia_ifp = ifp; 418151824Sglebius 419194760Srwatson ifa_ref(ifa); /* if_addrhead */ 420194760Srwatson IF_ADDR_LOCK(ifp); 421191285Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 422194760Srwatson IF_ADDR_UNLOCK(ifp); 423194760Srwatson ifa_ref(ifa); /* in_ifaddrhead */ 424194951Srwatson IN_IFADDR_WLOCK(); 425181803Sbz TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 426194951Srwatson IN_IFADDR_WUNLOCK(); 42787124Sbrian iaIsNew = 1; 4281541Srgrimes } 4291541Srgrimes break; 4301541Srgrimes 4311541Srgrimes case SIOCSIFBRDADDR: 4321541Srgrimes case SIOCGIFADDR: 4331541Srgrimes case SIOCGIFNETMASK: 4341541Srgrimes case SIOCGIFDSTADDR: 4351541Srgrimes case SIOCGIFBRDADDR: 436191500Srwatson if (ia == NULL) { 437191500Srwatson error = EADDRNOTAVAIL; 438194760Srwatson goto out; 439191500Srwatson } 4401541Srgrimes break; 4411541Srgrimes } 442191500Srwatson 443191500Srwatson /* 444194760Srwatson * Most paths in this switch return directly or via out. Only paths 445194760Srwatson * that remove the address break in order to hit common removal code. 446191500Srwatson */ 4471541Srgrimes switch (cmd) { 4481541Srgrimes case SIOCGIFADDR: 4491541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 450194760Srwatson goto out; 4511541Srgrimes 4521541Srgrimes case SIOCGIFBRDADDR: 453191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 454191500Srwatson error = EINVAL; 455194760Srwatson goto out; 456191500Srwatson } 4571541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 458194760Srwatson goto out; 4591541Srgrimes 4601541Srgrimes case SIOCGIFDSTADDR: 461191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 462191500Srwatson error = EINVAL; 463194760Srwatson goto out; 464191500Srwatson } 4651541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 466194760Srwatson goto out; 4671541Srgrimes 4681541Srgrimes case SIOCGIFNETMASK: 4691541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 470194760Srwatson goto out; 4711541Srgrimes 4721541Srgrimes case SIOCSIFDSTADDR: 473191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 474191500Srwatson error = EINVAL; 475194760Srwatson goto out; 476191500Srwatson } 4771541Srgrimes oldaddr = ia->ia_dstaddr; 4781541Srgrimes ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 479184295Sbz if (ifp->if_ioctl != NULL) { 480146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 481146883Siedowse (caddr_t)ia); 482146883Siedowse if (error) { 483146883Siedowse ia->ia_dstaddr = oldaddr; 484194760Srwatson goto out; 485146883Siedowse } 4861541Srgrimes } 4871541Srgrimes if (ia->ia_flags & IFA_ROUTE) { 4881541Srgrimes ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 4891541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 4901541Srgrimes ia->ia_ifa.ifa_dstaddr = 4911541Srgrimes (struct sockaddr *)&ia->ia_dstaddr; 4921541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 4931541Srgrimes } 494194760Srwatson goto out; 4951541Srgrimes 4961541Srgrimes case SIOCSIFBRDADDR: 497191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 498191500Srwatson error = EINVAL; 499194760Srwatson goto out; 500191500Srwatson } 5011541Srgrimes ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 502194760Srwatson goto out; 5031541Srgrimes 5041541Srgrimes case SIOCSIFADDR: 50587124Sbrian error = in_ifinit(ifp, ia, 50687124Sbrian (struct sockaddr_in *) &ifr->ifr_addr, 1); 50787124Sbrian if (error != 0 && iaIsNew) 50887124Sbrian break; 509168032Sbms if (error == 0) { 510189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 511189592Sbms if (iaIsFirst && 512189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 513189592Sbms error = in_joingroup(ifp, &allhosts_addr, 514189592Sbms NULL, &ii->ii_allhosts); 515189592Sbms } 516126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 517168032Sbms } 518194760Srwatson error = 0; 519194760Srwatson goto out; 5201541Srgrimes 5211541Srgrimes case SIOCSIFNETMASK: 52285740Sdes ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 52385740Sdes ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 524194760Srwatson goto out; 5251541Srgrimes 5261541Srgrimes case SIOCAIFADDR: 5271541Srgrimes maskIsNew = 0; 5281541Srgrimes hostIsNew = 1; 5291541Srgrimes error = 0; 5301541Srgrimes if (ia->ia_addr.sin_family == AF_INET) { 5311541Srgrimes if (ifra->ifra_addr.sin_len == 0) { 5321541Srgrimes ifra->ifra_addr = ia->ia_addr; 5331541Srgrimes hostIsNew = 0; 5341541Srgrimes } else if (ifra->ifra_addr.sin_addr.s_addr == 5351541Srgrimes ia->ia_addr.sin_addr.s_addr) 5361541Srgrimes hostIsNew = 0; 5371541Srgrimes } 5381541Srgrimes if (ifra->ifra_mask.sin_len) { 539197210Sqingli /* 540197210Sqingli * QL: XXX 541197210Sqingli * Need to scrub the prefix here in case 542197210Sqingli * the issued command is SIOCAIFADDR with 543197210Sqingli * the same address, but with a different 544197210Sqingli * prefix length. And if the prefix length 545197210Sqingli * is the same as before, then the call is 546197210Sqingli * un-necessarily executed here. 547197210Sqingli */ 548197210Sqingli in_ifscrub(ifp, ia); 5491541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 55085740Sdes ia->ia_sockmask.sin_family = AF_INET; 5511541Srgrimes ia->ia_subnetmask = 5521541Srgrimes ntohl(ia->ia_sockmask.sin_addr.s_addr); 5531541Srgrimes maskIsNew = 1; 5541541Srgrimes } 5551541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 5561541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 557197210Sqingli in_ifscrub(ifp, ia); 5581541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 5591541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 5601541Srgrimes } 5611541Srgrimes if (ifra->ifra_addr.sin_family == AF_INET && 5621541Srgrimes (hostIsNew || maskIsNew)) 5631541Srgrimes error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 56487124Sbrian if (error != 0 && iaIsNew) 565194760Srwatson goto out; 56687124Sbrian 5671541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 5681541Srgrimes (ifra->ifra_broadaddr.sin_family == AF_INET)) 5691541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 570168032Sbms if (error == 0) { 571189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 572189592Sbms if (iaIsFirst && 573189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 574189592Sbms error = in_joingroup(ifp, &allhosts_addr, 575189592Sbms NULL, &ii->ii_allhosts); 576189592Sbms } 577126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 578168032Sbms } 579194760Srwatson goto out; 5801541Srgrimes 5811541Srgrimes case SIOCDIFADDR: 58274299Sru /* 58374299Sru * in_ifscrub kills the interface route. 58474299Sru */ 5851541Srgrimes in_ifscrub(ifp, ia); 586191500Srwatson 58715092Sdg /* 58874299Sru * in_ifadown gets rid of all the rest of 58974299Sru * the routes. This is not quite the right 59074299Sru * thing to do, but at least if we are running 59174299Sru * a routing process they will come back. 59274299Sru */ 59376469Sru in_ifadown(&ia->ia_ifa, 1); 594126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 59587124Sbrian error = 0; 5961541Srgrimes break; 5971541Srgrimes 5981541Srgrimes default: 599191443Srwatson panic("in_control: unsupported ioctl"); 6001541Srgrimes } 60187124Sbrian 602191285Srwatson IF_ADDR_LOCK(ifp); 603191285Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 604191285Srwatson IF_ADDR_UNLOCK(ifp); 605194760Srwatson ifa_free(&ia->ia_ifa); /* if_addrhead */ 606194951Srwatson 607194951Srwatson IN_IFADDR_WLOCK(); 608181803Sbz TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 609168032Sbms if (ia->ia_addr.sin_family == AF_INET) { 610194760Srwatson struct in_ifaddr *if_ia; 611194760Srwatson 612154777Sandre LIST_REMOVE(ia, ia_hash); 613194951Srwatson IN_IFADDR_WUNLOCK(); 614168032Sbms /* 615168032Sbms * If this is the last IPv4 address configured on this 616168032Sbms * interface, leave the all-hosts group. 617189592Sbms * No state-change report need be transmitted. 618168032Sbms */ 619194760Srwatson if_ia = NULL; 620194760Srwatson IFP_TO_IA(ifp, if_ia); 621194760Srwatson if (if_ia == NULL) { 622189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 623168032Sbms IN_MULTI_LOCK(); 624189592Sbms if (ii->ii_allhosts) { 625189592Sbms (void)in_leavegroup_locked(ii->ii_allhosts, 626189592Sbms NULL); 627189592Sbms ii->ii_allhosts = NULL; 628189592Sbms } 629168032Sbms IN_MULTI_UNLOCK(); 630194760Srwatson } else 631194760Srwatson ifa_free(&if_ia->ia_ifa); 632194951Srwatson } else 633194951Srwatson IN_IFADDR_WUNLOCK(); 634194951Srwatson ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 635194760Srwatsonout: 636194760Srwatson if (ia != NULL) 637194760Srwatson ifa_free(&ia->ia_ifa); 63887124Sbrian return (error); 6391541Srgrimes} 6401541Srgrimes 6411541Srgrimes/* 64255009Sshin * SIOC[GAD]LIFADDR. 64355009Sshin * SIOCGLIFADDR: get first address. (?!?) 64455009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 64555009Sshin * get first address that matches the specified prefix. 64655009Sshin * SIOCALIFADDR: add the specified address. 64755009Sshin * SIOCALIFADDR with IFLR_PREFIX: 64855009Sshin * EINVAL since we can't deduce hostid part of the address. 64955009Sshin * SIOCDLIFADDR: delete the specified address. 65055009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 65155009Sshin * delete the first address that matches the specified prefix. 65255009Sshin * return values: 65355009Sshin * EINVAL on invalid parameters 65455009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 65555009Sshin * other values may be returned from in_ioctl() 65655009Sshin */ 65755009Sshinstatic int 658169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 659169454Srwatson struct ifnet *ifp, struct thread *td) 66055009Sshin{ 66155009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 66255009Sshin struct ifaddr *ifa; 66355009Sshin 66455009Sshin /* sanity checks */ 665184295Sbz if (data == NULL || ifp == NULL) { 66655009Sshin panic("invalid argument to in_lifaddr_ioctl"); 66755009Sshin /*NOTRECHED*/ 66855009Sshin } 66955009Sshin 67055009Sshin switch (cmd) { 67155009Sshin case SIOCGLIFADDR: 67255009Sshin /* address must be specified on GET with IFLR_PREFIX */ 67355009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 67455009Sshin break; 67555009Sshin /*FALLTHROUGH*/ 67655009Sshin case SIOCALIFADDR: 67755009Sshin case SIOCDLIFADDR: 67855009Sshin /* address must be specified on ADD and DELETE */ 67955917Sshin if (iflr->addr.ss_family != AF_INET) 680184295Sbz return (EINVAL); 68155917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 682184295Sbz return (EINVAL); 68355009Sshin /* XXX need improvement */ 68455917Sshin if (iflr->dstaddr.ss_family 68555917Sshin && iflr->dstaddr.ss_family != AF_INET) 686184295Sbz return (EINVAL); 68755917Sshin if (iflr->dstaddr.ss_family 68855917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 689184295Sbz return (EINVAL); 69055009Sshin break; 69155009Sshin default: /*shouldn't happen*/ 692184295Sbz return (EOPNOTSUPP); 69355009Sshin } 69455009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 695184295Sbz return (EINVAL); 69655009Sshin 69755009Sshin switch (cmd) { 69855009Sshin case SIOCALIFADDR: 69955009Sshin { 70055009Sshin struct in_aliasreq ifra; 70155009Sshin 70255009Sshin if (iflr->flags & IFLR_PREFIX) 703184295Sbz return (EINVAL); 70455009Sshin 70555009Sshin /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 70655009Sshin bzero(&ifra, sizeof(ifra)); 70755009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 70855009Sshin sizeof(ifra.ifra_name)); 70955009Sshin 71055917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 71155009Sshin 71255917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 71355009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 71455917Sshin iflr->dstaddr.ss_len); 71555009Sshin } 71655009Sshin 71755009Sshin ifra.ifra_mask.sin_family = AF_INET; 71855009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 71955009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 72055009Sshin 721184295Sbz return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 72255009Sshin } 72355009Sshin case SIOCGLIFADDR: 72455009Sshin case SIOCDLIFADDR: 72555009Sshin { 72655009Sshin struct in_ifaddr *ia; 72755009Sshin struct in_addr mask, candidate, match; 72855009Sshin struct sockaddr_in *sin; 72955009Sshin 73055009Sshin bzero(&mask, sizeof(mask)); 731170855Smjacob bzero(&match, sizeof(match)); 73255009Sshin if (iflr->flags & IFLR_PREFIX) { 73355009Sshin /* lookup a prefix rather than address. */ 73455009Sshin in_len2mask(&mask, iflr->prefixlen); 73555009Sshin 73655009Sshin sin = (struct sockaddr_in *)&iflr->addr; 73755009Sshin match.s_addr = sin->sin_addr.s_addr; 73855009Sshin match.s_addr &= mask.s_addr; 73955009Sshin 74055009Sshin /* if you set extra bits, that's wrong */ 74155009Sshin if (match.s_addr != sin->sin_addr.s_addr) 742184295Sbz return (EINVAL); 74355009Sshin 74455009Sshin } else { 745170855Smjacob /* on getting an address, take the 1st match */ 746170855Smjacob /* on deleting an address, do exact match */ 747170855Smjacob if (cmd != SIOCGLIFADDR) { 74855009Sshin in_len2mask(&mask, 32); 74955009Sshin sin = (struct sockaddr_in *)&iflr->addr; 75055009Sshin match.s_addr = sin->sin_addr.s_addr; 75155009Sshin } 75255009Sshin } 75355009Sshin 75455009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 75555009Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 75655009Sshin continue; 757170855Smjacob if (match.s_addr == 0) 75855009Sshin break; 75955009Sshin candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 76055009Sshin candidate.s_addr &= mask.s_addr; 76155009Sshin if (candidate.s_addr == match.s_addr) 76255009Sshin break; 76355009Sshin } 764184295Sbz if (ifa == NULL) 765184295Sbz return (EADDRNOTAVAIL); 76655009Sshin ia = (struct in_ifaddr *)ifa; 76755009Sshin 76855009Sshin if (cmd == SIOCGLIFADDR) { 76955009Sshin /* fill in the if_laddrreq structure */ 77055009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 77155009Sshin 77255009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 77355009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 77455009Sshin ia->ia_dstaddr.sin_len); 77555009Sshin } else 77655009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 77755009Sshin 77855009Sshin iflr->prefixlen = 77955009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 78055009Sshin 78155009Sshin iflr->flags = 0; /*XXX*/ 78255009Sshin 783184295Sbz return (0); 78455009Sshin } else { 78555009Sshin struct in_aliasreq ifra; 78655009Sshin 78755009Sshin /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 78855009Sshin bzero(&ifra, sizeof(ifra)); 78955009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 79055009Sshin sizeof(ifra.ifra_name)); 79155009Sshin 79255009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 79355009Sshin ia->ia_addr.sin_len); 79455009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 79555009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 79655009Sshin ia->ia_dstaddr.sin_len); 79755009Sshin } 79855009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 79955009Sshin ia->ia_sockmask.sin_len); 80055009Sshin 801184295Sbz return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 802184295Sbz ifp, td)); 80355009Sshin } 80455009Sshin } 80555009Sshin } 80655009Sshin 807184295Sbz return (EOPNOTSUPP); /*just for safety*/ 80855009Sshin} 80955009Sshin 81055009Sshin/* 8111541Srgrimes * Delete any existing route for an interface. 8121541Srgrimes */ 81322672Swollmanvoid 814169454Srwatsonin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) 8151541Srgrimes{ 816169454Srwatson 817137628Smlaier in_scrubprefix(ia); 8181541Srgrimes} 8191541Srgrimes 8201541Srgrimes/* 8211541Srgrimes * Initialize an interface's internet address 8221541Srgrimes * and routing table entry. 8231541Srgrimes */ 82412296Sphkstatic int 825169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 826169454Srwatson int scrub) 8271541Srgrimes{ 8281541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 8291541Srgrimes struct sockaddr_in oldaddr; 830192011Sqingli struct rtentry *rt = NULL; 831192011Sqingli struct rt_addrinfo info; 832192011Sqingli static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 83394326Sbrian int s = splimp(), flags = RTF_UP, error = 0; 8341541Srgrimes 8351541Srgrimes oldaddr = ia->ia_addr; 836105748Ssuz if (oldaddr.sin_family == AF_INET) 837105748Ssuz LIST_REMOVE(ia, ia_hash); 8381541Srgrimes ia->ia_addr = *sin; 839194951Srwatson if (ia->ia_addr.sin_family == AF_INET) { 840194951Srwatson IN_IFADDR_WLOCK(); 841105748Ssuz LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 842105748Ssuz ia, ia_hash); 843194951Srwatson IN_IFADDR_WUNLOCK(); 844194951Srwatson } 8451541Srgrimes /* 8461541Srgrimes * Give the interface a chance to initialize 8471541Srgrimes * if this is its first address, 8481541Srgrimes * and to validate the address if necessary. 8491541Srgrimes */ 850184295Sbz if (ifp->if_ioctl != NULL) { 851146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 852146883Siedowse if (error) { 853146883Siedowse splx(s); 854146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 855146883Siedowse ia->ia_addr = oldaddr; 856194951Srwatson IN_IFADDR_WLOCK(); 857146883Siedowse if (ia->ia_addr.sin_family == AF_INET) 858146883Siedowse LIST_INSERT_HEAD(INADDR_HASH( 859146883Siedowse ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 860179971Sgonzo else 861179971Sgonzo /* 862179971Sgonzo * If oldaddr family is not AF_INET (e.g. 863179971Sgonzo * interface has been just created) in_control 864179971Sgonzo * does not call LIST_REMOVE, and we end up 865179971Sgonzo * with bogus ia entries in hash 866179971Sgonzo */ 867179971Sgonzo LIST_REMOVE(ia, ia_hash); 868194951Srwatson IN_IFADDR_WUNLOCK(); 869146883Siedowse return (error); 870146883Siedowse } 8711541Srgrimes } 8721541Srgrimes splx(s); 8731541Srgrimes if (scrub) { 8741541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 8751541Srgrimes in_ifscrub(ifp, ia); 8761541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 8771541Srgrimes } 8781541Srgrimes if (IN_CLASSA(i)) 8791541Srgrimes ia->ia_netmask = IN_CLASSA_NET; 8801541Srgrimes else if (IN_CLASSB(i)) 8811541Srgrimes ia->ia_netmask = IN_CLASSB_NET; 8821541Srgrimes else 8831541Srgrimes ia->ia_netmask = IN_CLASSC_NET; 8841541Srgrimes /* 8851541Srgrimes * The subnet mask usually includes at least the standard network part, 8861541Srgrimes * but may may be smaller in the case of supernetting. 8871541Srgrimes * If it is set, we believe it. 8881541Srgrimes */ 8891541Srgrimes if (ia->ia_subnetmask == 0) { 8901541Srgrimes ia->ia_subnetmask = ia->ia_netmask; 8911541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 8921541Srgrimes } else 8931541Srgrimes ia->ia_netmask &= ia->ia_subnetmask; 8941541Srgrimes ia->ia_net = i & ia->ia_netmask; 8951541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 8961541Srgrimes in_socktrim(&ia->ia_sockmask); 897143868Sglebius#ifdef DEV_CARP 8981541Srgrimes /* 899143868Sglebius * XXX: carp(4) does not have interface route 900143868Sglebius */ 901143868Sglebius if (ifp->if_type == IFT_CARP) 902143868Sglebius return (0); 903143868Sglebius#endif 904143868Sglebius /* 9051541Srgrimes * Add route for the network. 9061541Srgrimes */ 9071541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 9081541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 9091541Srgrimes ia->ia_broadaddr.sin_addr.s_addr = 9101541Srgrimes htonl(ia->ia_subnet | ~ia->ia_subnetmask); 9111541Srgrimes ia->ia_netbroadcast.s_addr = 9121541Srgrimes htonl(ia->ia_net | ~ ia->ia_netmask); 9131541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 914137833Smlaier ia->ia_dstaddr = ia->ia_addr; 9151541Srgrimes flags |= RTF_HOST; 9161541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 9171541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 9181541Srgrimes return (0); 9191541Srgrimes flags |= RTF_HOST; 9201541Srgrimes } 921137628Smlaier if ((error = in_addprefix(ia, flags)) != 0) 922137628Smlaier return (error); 92394326Sbrian 924192085Sqingli if (ia->ia_addr.sin_addr.s_addr == INADDR_ANY) 925192085Sqingli return (0); 926192085Sqingli 927192011Sqingli /* 928192011Sqingli * add a loopback route to self 929192011Sqingli */ 930195914Sqingli if (V_useloopback && !(ifp->if_flags & IFF_LOOPBACK)) { 931192011Sqingli bzero(&info, sizeof(info)); 932192011Sqingli info.rti_ifp = V_loif; 933192011Sqingli info.rti_flags = ia->ia_flags | RTF_HOST | RTF_STATIC; 934192011Sqingli info.rti_info[RTAX_DST] = (struct sockaddr *)&ia->ia_addr; 935192011Sqingli info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 936192011Sqingli error = rtrequest1_fib(RTM_ADD, &info, &rt, 0); 937192011Sqingli 938192011Sqingli if (error == 0 && rt != NULL) { 939192011Sqingli RT_LOCK(rt); 940192011Sqingli ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 941192011Sqingli rt->rt_ifp->if_type; 942192011Sqingli ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 943192011Sqingli rt->rt_ifp->if_index; 944192011Sqingli RT_REMREF(rt); 945192011Sqingli RT_UNLOCK(rt); 946192011Sqingli } else if (error != 0) 947192011Sqingli log(LOG_INFO, "in_ifinit: insertion failed\n"); 948192011Sqingli } 949192011Sqingli 9501541Srgrimes return (error); 9511541Srgrimes} 9521541Srgrimes 953137628Smlaier#define rtinitflags(x) \ 954137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 955137628Smlaier ? RTF_HOST : 0) 956137628Smlaier/* 957170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 958137628Smlaier */ 959137628Smlaierstatic int 960169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 961137628Smlaier{ 962137628Smlaier struct in_ifaddr *ia; 963151555Sglebius struct in_addr prefix, mask, p, m; 964137628Smlaier int error; 9651541Srgrimes 966170855Smjacob if ((flags & RTF_HOST) != 0) { 967137628Smlaier prefix = target->ia_dstaddr.sin_addr; 968170855Smjacob mask.s_addr = 0; 969170855Smjacob } else { 970137628Smlaier prefix = target->ia_addr.sin_addr; 971137628Smlaier mask = target->ia_sockmask.sin_addr; 972137628Smlaier prefix.s_addr &= mask.s_addr; 973137628Smlaier } 974137628Smlaier 975194951Srwatson IN_IFADDR_RLOCK(); 976181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 977151555Sglebius if (rtinitflags(ia)) { 978137628Smlaier p = ia->ia_addr.sin_addr; 979151555Sglebius 980151555Sglebius if (prefix.s_addr != p.s_addr) 981151555Sglebius continue; 982151555Sglebius } else { 983151555Sglebius p = ia->ia_addr.sin_addr; 984151555Sglebius m = ia->ia_sockmask.sin_addr; 985151555Sglebius p.s_addr &= m.s_addr; 986151555Sglebius 987151555Sglebius if (prefix.s_addr != p.s_addr || 988151555Sglebius mask.s_addr != m.s_addr) 989151555Sglebius continue; 990137628Smlaier } 991137628Smlaier 992137628Smlaier /* 993137628Smlaier * If we got a matching prefix route inserted by other 994137628Smlaier * interface address, we are done here. 995137628Smlaier */ 996149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 997181803Sbz if (V_sameprefixcarponly && 998149221Sglebius target->ia_ifp->if_type != IFT_CARP && 999194951Srwatson ia->ia_ifp->if_type != IFT_CARP) { 1000194951Srwatson IN_IFADDR_RUNLOCK(); 1001149221Sglebius return (EEXIST); 1002194951Srwatson } else { 1003196714Sqingli struct route pfx_ro; 1004196714Sqingli struct sockaddr_in *pfx_addr; 1005196714Sqingli struct rtentry msg_rt; 1006196714Sqingli 1007196714Sqingli /* QL: XXX 1008196714Sqingli * This is a bit questionable because there is no 1009196714Sqingli * additional route entry added for an address alias. 1010196714Sqingli * Therefore this route report is inaccurate. Perhaps 1011196714Sqingli * it's better to supply a empty rtentry as how it 1012196714Sqingli * is done in in_scrubprefix(). 1013196714Sqingli */ 1014196714Sqingli bzero(&pfx_ro, sizeof(pfx_ro)); 1015196714Sqingli pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); 1016196714Sqingli pfx_addr->sin_len = sizeof(*pfx_addr); 1017196714Sqingli pfx_addr->sin_family = AF_INET; 1018196714Sqingli pfx_addr->sin_addr = prefix; 1019196714Sqingli rtalloc_ign_fib(&pfx_ro, 0, 0); 1020196714Sqingli if (pfx_ro.ro_rt != NULL) { 1021196714Sqingli msg_rt = *pfx_ro.ro_rt; 1022196714Sqingli /* QL: XXX 1023196714Sqingli * Point the gateway to the given interface 1024196714Sqingli * address as if a new prefix route entry has 1025196714Sqingli * been added through the new address alias. 1026196714Sqingli * All other parts of the rtentry is accurate, 1027196714Sqingli * e.g., rt_key, rt_mask, rt_ifp etc. 1028196714Sqingli */ 1029196714Sqingli msg_rt.rt_gateway = 1030196714Sqingli (struct sockaddr *)&ia->ia_addr; 1031196714Sqingli rt_newaddrmsg(RTM_ADD, 1032196714Sqingli (struct ifaddr *)target, 1033196714Sqingli 0, &msg_rt); 1034196714Sqingli RTFREE(pfx_ro.ro_rt); 1035196714Sqingli } 1036196714Sqingli 1037194951Srwatson IN_IFADDR_RUNLOCK(); 1038149221Sglebius return (0); 1039194951Srwatson } 1040149221Sglebius } 1041137628Smlaier } 1042194951Srwatson IN_IFADDR_RUNLOCK(); 1043137628Smlaier 1044137628Smlaier /* 1045137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 1046137628Smlaier */ 1047137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 1048137628Smlaier if (!error) 1049137628Smlaier target->ia_flags |= IFA_ROUTE; 1050184295Sbz return (error); 1051137628Smlaier} 1052137628Smlaier 1053186119Sqingliextern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); 1054186119Sqingli 10551541Srgrimes/* 1056137628Smlaier * If there is no other address in the system that can serve a route to the 1057137628Smlaier * same prefix, remove the route. Hand over the route to the new address 1058137628Smlaier * otherwise. 1059137628Smlaier */ 1060137628Smlaierstatic int 1061169454Srwatsonin_scrubprefix(struct in_ifaddr *target) 1062137628Smlaier{ 1063137628Smlaier struct in_ifaddr *ia; 1064137628Smlaier struct in_addr prefix, mask, p; 1065137628Smlaier int error; 1066192476Sqingli struct sockaddr_in prefix0, mask0; 1067192011Sqingli struct rt_addrinfo info; 1068192011Sqingli struct sockaddr_dl null_sdl; 1069137628Smlaier 1070195914Sqingli /* 1071195914Sqingli * Remove the loopback route to the interface address. 1072195914Sqingli * The "useloopback" setting is not consulted because if the 1073195914Sqingli * user configures an interface address, turns off this 1074195914Sqingli * setting, and then tries to delete that interface address, 1075195914Sqingli * checking the current setting of "useloopback" would leave 1076195914Sqingli * that interface address loopback route untouched, which 1077195914Sqingli * would be wrong. Therefore the interface address loopback route 1078195914Sqingli * deletion is unconditional. 1079195914Sqingli */ 1080192085Sqingli if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && 1081195914Sqingli !(target->ia_ifp->if_flags & IFF_LOOPBACK)) { 1082192011Sqingli bzero(&null_sdl, sizeof(null_sdl)); 1083192011Sqingli null_sdl.sdl_len = sizeof(null_sdl); 1084192011Sqingli null_sdl.sdl_family = AF_LINK; 1085192011Sqingli null_sdl.sdl_type = V_loif->if_type; 1086192011Sqingli null_sdl.sdl_index = V_loif->if_index; 1087192011Sqingli bzero(&info, sizeof(info)); 1088192011Sqingli info.rti_flags = target->ia_flags | RTF_HOST | RTF_STATIC; 1089192011Sqingli info.rti_info[RTAX_DST] = (struct sockaddr *)&target->ia_addr; 1090192011Sqingli info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1091192011Sqingli error = rtrequest1_fib(RTM_DELETE, &info, NULL, 0); 1092192011Sqingli 1093192011Sqingli if (error != 0) 1094192011Sqingli log(LOG_INFO, "in_scrubprefix: deletion failed\n"); 1095192011Sqingli } 1096192011Sqingli 1097196714Sqingli if ((target->ia_flags & IFA_ROUTE) == 0) { 1098196714Sqingli struct rtentry rt; 1099196714Sqingli 1100196714Sqingli /* QL: XXX 1101196714Sqingli * Report a blank rtentry when a route has not been 1102196714Sqingli * installed for the given interface address. 1103196714Sqingli */ 1104196714Sqingli bzero(&rt, sizeof(rt)); 1105196714Sqingli rt_newaddrmsg(RTM_DELETE, 1106196714Sqingli (struct ifaddr *)target, 1107196714Sqingli 0, &rt); 1108196714Sqingli return (0); 1109196714Sqingli } 1110196714Sqingli 1111137628Smlaier if (rtinitflags(target)) 1112137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1113137628Smlaier else { 1114137628Smlaier prefix = target->ia_addr.sin_addr; 1115137628Smlaier mask = target->ia_sockmask.sin_addr; 1116137628Smlaier prefix.s_addr &= mask.s_addr; 1117186119Sqingli /* remove arp cache */ 1118186119Sqingli arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 1119137628Smlaier } 1120137628Smlaier 1121194951Srwatson IN_IFADDR_RLOCK(); 1122181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1123137628Smlaier if (rtinitflags(ia)) 1124137628Smlaier p = ia->ia_dstaddr.sin_addr; 1125137628Smlaier else { 1126137628Smlaier p = ia->ia_addr.sin_addr; 1127137628Smlaier p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 1128137628Smlaier } 1129137628Smlaier 1130137628Smlaier if (prefix.s_addr != p.s_addr) 1131137628Smlaier continue; 1132137628Smlaier 1133137628Smlaier /* 1134137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 1135137628Smlaier * the route itself to it. Make sure that routing daemons 1136137628Smlaier * get a heads-up. 1137143868Sglebius * 1138143868Sglebius * XXX: a special case for carp(4) interface 1139137628Smlaier */ 1140143868Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0 1141143868Sglebius#ifdef DEV_CARP 1142143868Sglebius && (ia->ia_ifp->if_type != IFT_CARP) 1143143868Sglebius#endif 1144143868Sglebius ) { 1145194951Srwatson IN_IFADDR_RUNLOCK(); 1146137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, 1147137628Smlaier rtinitflags(target)); 1148137628Smlaier target->ia_flags &= ~IFA_ROUTE; 1149137628Smlaier 1150137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 1151137628Smlaier rtinitflags(ia) | RTF_UP); 1152137628Smlaier if (error == 0) 1153137628Smlaier ia->ia_flags |= IFA_ROUTE; 1154184295Sbz return (error); 1155137628Smlaier } 1156137628Smlaier } 1157194951Srwatson IN_IFADDR_RUNLOCK(); 1158137628Smlaier 1159137628Smlaier /* 1160192476Sqingli * remove all L2 entries on the given prefix 1161192476Sqingli */ 1162192476Sqingli bzero(&prefix0, sizeof(prefix0)); 1163192476Sqingli prefix0.sin_len = sizeof(prefix0); 1164192476Sqingli prefix0.sin_family = AF_INET; 1165192476Sqingli prefix0.sin_addr.s_addr = target->ia_subnet; 1166192476Sqingli bzero(&mask0, sizeof(mask0)); 1167192476Sqingli mask0.sin_len = sizeof(mask0); 1168192476Sqingli mask0.sin_family = AF_INET; 1169192476Sqingli mask0.sin_addr.s_addr = target->ia_subnetmask; 1170192476Sqingli lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, 1171192476Sqingli (struct sockaddr *)&mask0); 1172192476Sqingli 1173192476Sqingli /* 1174137628Smlaier * As no-one seem to have this prefix, we can remove the route. 1175137628Smlaier */ 1176137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 1177137628Smlaier target->ia_flags &= ~IFA_ROUTE; 1178184295Sbz return (0); 1179137628Smlaier} 1180137628Smlaier 1181137628Smlaier#undef rtinitflags 1182137628Smlaier 1183137628Smlaier/* 11841541Srgrimes * Return 1 if the address might be a local broadcast address. 11851541Srgrimes */ 11861549Srgrimesint 1187169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 11881541Srgrimes{ 11891541Srgrimes register struct ifaddr *ifa; 11901541Srgrimes u_long t; 11911541Srgrimes 11921541Srgrimes if (in.s_addr == INADDR_BROADCAST || 11931541Srgrimes in.s_addr == INADDR_ANY) 1194184295Sbz return (1); 11951541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 1196184295Sbz return (0); 11971541Srgrimes t = ntohl(in.s_addr); 11981541Srgrimes /* 11991541Srgrimes * Look through the list of addresses for a match 12001541Srgrimes * with a broadcast address. 12011541Srgrimes */ 12021541Srgrimes#define ia ((struct in_ifaddr *)ifa) 120374362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 12041541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 12051541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 12061541Srgrimes in.s_addr == ia->ia_netbroadcast.s_addr || 12071541Srgrimes /* 12081541Srgrimes * Check for old-style (host 0) broadcast. 12091541Srgrimes */ 121013351Sguido t == ia->ia_subnet || t == ia->ia_net) && 121113351Sguido /* 121213351Sguido * Check for an all one subnetmask. These 121313351Sguido * only exist when an interface gets a secondary 121413351Sguido * address. 121513351Sguido */ 121613351Sguido ia->ia_subnetmask != (u_long)0xffffffff) 1217184295Sbz return (1); 12181541Srgrimes return (0); 12191541Srgrimes#undef ia 12201541Srgrimes} 1221167729Sbms 12221541Srgrimes/* 1223189592Sbms * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1224189592Sbms */ 1225189592Sbmsvoid 1226189592Sbmsin_ifdetach(struct ifnet *ifp) 1227189592Sbms{ 1228189592Sbms 1229189592Sbms in_pcbpurgeif0(&V_ripcbinfo, ifp); 1230189592Sbms in_pcbpurgeif0(&V_udbinfo, ifp); 1231189592Sbms in_purgemaddrs(ifp); 1232189592Sbms} 1233189592Sbms 1234189592Sbms/* 1235167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 1236167729Sbms * multicast address records, associated with ifp. 1237189592Sbms * XXX It looks like domifdetach runs AFTER the link layer cleanup. 1238189931Sbms * XXX This should not race with ifma_protospec being set during 1239189931Sbms * a new allocation, if it does, we have bigger problems. 1240162718Sbms */ 1241167729Sbmsstatic void 1242167729Sbmsin_purgemaddrs(struct ifnet *ifp) 1243162718Sbms{ 1244189592Sbms LIST_HEAD(,in_multi) purgeinms; 1245189592Sbms struct in_multi *inm, *tinm; 1246189592Sbms struct ifmultiaddr *ifma; 1247162718Sbms 1248189592Sbms LIST_INIT(&purgeinms); 1249162718Sbms IN_MULTI_LOCK(); 1250189592Sbms 1251189592Sbms /* 1252189592Sbms * Extract list of in_multi associated with the detaching ifp 1253189592Sbms * which the PF_INET layer is about to release. 1254189592Sbms * We need to do this as IF_ADDR_LOCK() may be re-acquired 1255189592Sbms * by code further down. 1256189592Sbms */ 1257189592Sbms IF_ADDR_LOCK(ifp); 1258189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1259189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 1260189931Sbms ifma->ifma_protospec == NULL) 1261189592Sbms continue; 1262189931Sbms#if 0 1263189931Sbms KASSERT(ifma->ifma_protospec != NULL, 1264189931Sbms ("%s: ifma_protospec is NULL", __func__)); 1265189931Sbms#endif 1266189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 1267189592Sbms LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 1268162718Sbms } 1269189592Sbms IF_ADDR_UNLOCK(ifp); 1270150296Srwatson 1271189592Sbms LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 1272191476Srwatson LIST_REMOVE(inm, inm_link); 1273189592Sbms inm_release_locked(inm); 1274189592Sbms } 1275189592Sbms igmp_ifdetach(ifp); 1276150296Srwatson 1277189592Sbms IN_MULTI_UNLOCK(); 1278150296Srwatson} 1279186119Sqingli 1280186119Sqingli#include <net/if_dl.h> 1281186119Sqingli#include <netinet/if_ether.h> 1282186119Sqingli 1283186119Sqinglistruct in_llentry { 1284186119Sqingli struct llentry base; 1285186119Sqingli struct sockaddr_in l3_addr4; 1286186119Sqingli}; 1287186119Sqingli 1288186119Sqinglistatic struct llentry * 1289186119Sqingliin_lltable_new(const struct sockaddr *l3addr, u_int flags) 1290186119Sqingli{ 1291186119Sqingli struct in_llentry *lle; 1292186119Sqingli 1293186119Sqingli lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); 1294186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 1295186119Sqingli return NULL; 1296186119Sqingli 1297186119Sqingli callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); 1298186119Sqingli /* 1299186119Sqingli * For IPv4 this will trigger "arpresolve" to generate 1300186119Sqingli * an ARP request. 1301186119Sqingli */ 1302186119Sqingli lle->base.la_expire = time_second; /* mark expired */ 1303186119Sqingli lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1304186119Sqingli lle->base.lle_refcnt = 1; 1305186119Sqingli LLE_LOCK_INIT(&lle->base); 1306186119Sqingli return &lle->base; 1307186119Sqingli} 1308186119Sqingli 1309186119Sqingli/* 1310186119Sqingli * Deletes an address from the address table. 1311186119Sqingli * This function is called by the timer functions 1312186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 1313186119Sqingli * the caller does the locking. 1314186119Sqingli */ 1315186119Sqinglistatic void 1316186119Sqingliin_lltable_free(struct lltable *llt, struct llentry *lle) 1317186119Sqingli{ 1318186150Skmacy LLE_WUNLOCK(lle); 1319186150Skmacy LLE_LOCK_DESTROY(lle); 1320186119Sqingli free(lle, M_LLTABLE); 1321186119Sqingli} 1322186119Sqingli 1323192476Sqingli 1324192476Sqingli#define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 1325192476Sqingli (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) 1326192476Sqingli 1327192476Sqinglistatic void 1328192476Sqingliin_lltable_prefix_free(struct lltable *llt, 1329192476Sqingli const struct sockaddr *prefix, 1330192476Sqingli const struct sockaddr *mask) 1331192476Sqingli{ 1332192476Sqingli const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; 1333192476Sqingli const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; 1334192476Sqingli struct llentry *lle, *next; 1335192476Sqingli register int i; 1336192476Sqingli 1337192476Sqingli for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 1338192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 1339192476Sqingli 1340192476Sqingli if (IN_ARE_MASKED_ADDR_EQUAL((struct sockaddr_in *)L3_ADDR(lle), 1341192476Sqingli pfx, msk)) { 1342192476Sqingli callout_drain(&lle->la_timer); 1343192476Sqingli LLE_WLOCK(lle); 1344192476Sqingli llentry_free(lle); 1345192476Sqingli } 1346192476Sqingli } 1347192476Sqingli } 1348192476Sqingli} 1349192476Sqingli 1350192476Sqingli 1351186119Sqinglistatic int 1352186119Sqingliin_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 1353186119Sqingli{ 1354186119Sqingli struct rtentry *rt; 1355186119Sqingli 1356186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1357186119Sqingli ("sin_family %d", l3addr->sa_family)); 1358186119Sqingli 1359186119Sqingli /* XXX rtalloc1 should take a const param */ 1360186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1361186119Sqingli if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 1362186119Sqingli log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1363186119Sqingli inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1364186119Sqingli if (rt != NULL) 1365186119Sqingli RTFREE_LOCKED(rt); 1366186119Sqingli return (EINVAL); 1367186119Sqingli } 1368186119Sqingli RTFREE_LOCKED(rt); 1369186119Sqingli return 0; 1370186119Sqingli} 1371186119Sqingli 1372186119Sqingli/* 1373186119Sqingli * Return NULL if not found or marked for deletion. 1374186119Sqingli * If found return lle read locked. 1375186119Sqingli */ 1376186119Sqinglistatic struct llentry * 1377186119Sqingliin_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1378186119Sqingli{ 1379186119Sqingli const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1380186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1381186119Sqingli struct llentry *lle; 1382186119Sqingli struct llentries *lleh; 1383186119Sqingli u_int hashkey; 1384186119Sqingli 1385186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 1386186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1387186119Sqingli ("sin_family %d", l3addr->sa_family)); 1388186119Sqingli 1389186119Sqingli hashkey = sin->sin_addr.s_addr; 1390186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1391186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 1392186708Sqingli struct sockaddr_in *sa2 = (struct sockaddr_in *)L3_ADDR(lle); 1393186119Sqingli if (lle->la_flags & LLE_DELETED) 1394186119Sqingli continue; 1395186708Sqingli if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1396186119Sqingli break; 1397186119Sqingli } 1398186119Sqingli if (lle == NULL) { 1399186119Sqingli#ifdef DIAGNOSTICS 1400186119Sqingli if (flags & LLE_DELETE) 1401186119Sqingli log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1402186119Sqingli#endif 1403186119Sqingli if (!(flags & LLE_CREATE)) 1404186119Sqingli return (NULL); 1405186119Sqingli /* 1406186119Sqingli * A route that covers the given address must have 1407186119Sqingli * been installed 1st because we are doing a resolution, 1408186119Sqingli * verify this. 1409186119Sqingli */ 1410186119Sqingli if (!(flags & LLE_IFADDR) && 1411186119Sqingli in_lltable_rtcheck(ifp, l3addr) != 0) 1412186119Sqingli goto done; 1413186119Sqingli 1414186119Sqingli lle = in_lltable_new(l3addr, flags); 1415186119Sqingli if (lle == NULL) { 1416186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1417186119Sqingli goto done; 1418186119Sqingli } 1419186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 1420186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1421186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1422186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 1423186119Sqingli } 1424186119Sqingli 1425186119Sqingli lle->lle_tbl = llt; 1426186119Sqingli lle->lle_head = lleh; 1427186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 1428186119Sqingli } else if (flags & LLE_DELETE) { 1429186119Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1430186119Sqingli LLE_WLOCK(lle); 1431186119Sqingli lle->la_flags = LLE_DELETED; 1432196995Snp EVENTHANDLER_INVOKE(arp_update_event, lle); 1433186119Sqingli LLE_WUNLOCK(lle); 1434186119Sqingli#ifdef DIAGNOSTICS 1435186119Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1436186119Sqingli#endif 1437186119Sqingli } 1438186119Sqingli lle = (void *)-1; 1439186119Sqingli 1440186119Sqingli } 1441186544Sbz if (LLE_IS_VALID(lle)) { 1442186119Sqingli if (flags & LLE_EXCLUSIVE) 1443186119Sqingli LLE_WLOCK(lle); 1444186119Sqingli else 1445186119Sqingli LLE_RLOCK(lle); 1446186119Sqingli } 1447186119Sqinglidone: 1448186119Sqingli return (lle); 1449186119Sqingli} 1450186119Sqingli 1451186119Sqinglistatic int 1452186119Sqingliin_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1453186119Sqingli{ 1454186119Sqingli#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1455186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1456186119Sqingli struct llentry *lle; 1457186119Sqingli /* XXX stack use */ 1458186119Sqingli struct { 1459186119Sqingli struct rt_msghdr rtm; 1460186119Sqingli struct sockaddr_inarp sin; 1461186119Sqingli struct sockaddr_dl sdl; 1462186119Sqingli } arpc; 1463186119Sqingli int error, i; 1464186119Sqingli 1465196535Srwatson LLTABLE_LOCK_ASSERT(); 1466186119Sqingli 1467186119Sqingli error = 0; 1468186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1469186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1470186119Sqingli struct sockaddr_dl *sdl; 1471186119Sqingli 1472186119Sqingli /* skip deleted entries */ 1473186119Sqingli if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 1474186119Sqingli continue; 1475186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 1476188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1477186980Sbz continue; 1478186119Sqingli /* 1479186119Sqingli * produce a msg made of: 1480186119Sqingli * struct rt_msghdr; 1481186119Sqingli * struct sockaddr_inarp; (IPv4) 1482186119Sqingli * struct sockaddr_dl; 1483186119Sqingli */ 1484186119Sqingli bzero(&arpc, sizeof(arpc)); 1485186119Sqingli arpc.rtm.rtm_msglen = sizeof(arpc); 1486186935Sharti arpc.rtm.rtm_version = RTM_VERSION; 1487186935Sharti arpc.rtm.rtm_type = RTM_GET; 1488186935Sharti arpc.rtm.rtm_flags = RTF_UP; 1489186935Sharti arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1490186119Sqingli arpc.sin.sin_family = AF_INET; 1491186119Sqingli arpc.sin.sin_len = sizeof(arpc.sin); 1492186119Sqingli arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1493186119Sqingli 1494186119Sqingli /* publish */ 1495186119Sqingli if (lle->la_flags & LLE_PUB) { 1496186119Sqingli arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1497186119Sqingli /* proxy only */ 1498186119Sqingli if (lle->la_flags & LLE_PROXY) 1499186119Sqingli arpc.sin.sin_other = SIN_PROXY; 1500186119Sqingli } 1501186119Sqingli 1502186119Sqingli sdl = &arpc.sdl; 1503186119Sqingli sdl->sdl_family = AF_LINK; 1504186119Sqingli sdl->sdl_len = sizeof(*sdl); 1505186119Sqingli sdl->sdl_alen = ifp->if_addrlen; 1506186119Sqingli sdl->sdl_index = ifp->if_index; 1507186119Sqingli sdl->sdl_type = ifp->if_type; 1508186119Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1509186119Sqingli 1510186119Sqingli arpc.rtm.rtm_rmx.rmx_expire = 1511186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1512186500Sqingli arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1513186119Sqingli if (lle->la_flags & LLE_STATIC) 1514186119Sqingli arpc.rtm.rtm_flags |= RTF_STATIC; 1515186119Sqingli arpc.rtm.rtm_index = ifp->if_index; 1516186119Sqingli error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1517186119Sqingli if (error) 1518186119Sqingli break; 1519186119Sqingli } 1520186119Sqingli } 1521186119Sqingli return error; 1522186119Sqingli#undef SIN 1523186119Sqingli} 1524186119Sqingli 1525186119Sqinglivoid * 1526186119Sqingliin_domifattach(struct ifnet *ifp) 1527189592Sbms{ 1528189592Sbms struct in_ifinfo *ii; 1529189592Sbms struct lltable *llt; 1530189592Sbms 1531189592Sbms ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1532189592Sbms 1533189592Sbms llt = lltable_init(ifp, AF_INET); 1534186119Sqingli if (llt != NULL) { 1535186119Sqingli llt->llt_new = in_lltable_new; 1536186119Sqingli llt->llt_free = in_lltable_free; 1537192476Sqingli llt->llt_prefix_free = in_lltable_prefix_free; 1538186119Sqingli llt->llt_rtcheck = in_lltable_rtcheck; 1539186119Sqingli llt->llt_lookup = in_lltable_lookup; 1540186119Sqingli llt->llt_dump = in_lltable_dump; 1541186119Sqingli } 1542189592Sbms ii->ii_llt = llt; 1543189592Sbms 1544189592Sbms ii->ii_igmp = igmp_domifattach(ifp); 1545189592Sbms 1546189592Sbms return ii; 1547186119Sqingli} 1548186119Sqingli 1549186119Sqinglivoid 1550189592Sbmsin_domifdetach(struct ifnet *ifp, void *aux) 1551186119Sqingli{ 1552189592Sbms struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1553186119Sqingli 1554189592Sbms igmp_domifdetach(ifp); 1555189592Sbms lltable_free(ii->ii_llt); 1556189592Sbms free(ii, M_IFADDR); 1557186119Sqingli} 1558