in.c revision 223862
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 223862 2011-07-08 09:38:33Z zec $"); 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> 52215207Sgnn#include <net/if_arp.h> 53192011Sqingli#include <net/if_dl.h> 54186119Sqingli#include <net/if_llatbl.h> 5555009Sshin#include <net/if_types.h> 561541Srgrimes#include <net/route.h> 57192011Sqingli#include <net/vnet.h> 581541Srgrimes 591541Srgrimes#include <netinet/in.h> 601541Srgrimes#include <netinet/in_var.h> 6181127Sume#include <netinet/in_pcb.h> 62170613Sbms#include <netinet/ip_var.h> 63189592Sbms#include <netinet/igmp_var.h> 64195699Srwatson#include <netinet/udp.h> 65195699Srwatson#include <netinet/udp_var.h> 661541Srgrimes 6792723Salfredstatic int in_mask2len(struct in_addr *); 6892723Salfredstatic void in_len2mask(struct in_addr *, int); 6992723Salfredstatic int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 7092723Salfred struct ifnet *, struct thread *); 7155009Sshin 72137628Smlaierstatic int in_addprefix(struct in_ifaddr *, int); 73222143Sqinglistatic int in_scrubprefix(struct in_ifaddr *, u_int); 7492723Salfredstatic void in_socktrim(struct sockaddr_in *); 7592723Salfredstatic int in_ifinit(struct ifnet *, 7692723Salfred struct in_ifaddr *, struct sockaddr_in *, int); 77167729Sbmsstatic void in_purgemaddrs(struct ifnet *); 781541Srgrimes 79215701Sdimstatic VNET_DEFINE(int, subnetsarelocal); 80195727Srwatson#define V_subnetsarelocal VNET(subnetsarelocal) 81195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, 82195699Srwatson &VNET_NAME(subnetsarelocal), 0, 83183550Szec "Treat all subnets as directly connected"); 84215701Sdimstatic VNET_DEFINE(int, sameprefixcarponly); 85207369Sbz#define V_sameprefixcarponly VNET(sameprefixcarponly) 86195699SrwatsonSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, 87195699Srwatson &VNET_NAME(sameprefixcarponly), 0, 88149221Sglebius "Refuse to create same prefixes on different interfaces"); 8921666Swollman 90207369SbzVNET_DECLARE(struct inpcbinfo, ripcbinfo); 91207369Sbz#define V_ripcbinfo VNET(ripcbinfo) 92207369Sbz 93215207SgnnVNET_DECLARE(struct arpstat, arpstat); /* ARP statistics, see if_arp.h */ 94215207Sgnn#define V_arpstat VNET(arpstat) 95215207Sgnn 961541Srgrimes/* 971541Srgrimes * Return 1 if an internet address is for a ``local'' host 981541Srgrimes * (one to which we have a connection). If subnetsarelocal 991541Srgrimes * is true, this includes other subnets of the local net. 1001541Srgrimes * Otherwise, it includes only the directly-connected (sub)nets. 1011541Srgrimes */ 1021549Srgrimesint 103169454Srwatsonin_localaddr(struct in_addr in) 1041541Srgrimes{ 1051541Srgrimes register u_long i = ntohl(in.s_addr); 1061541Srgrimes register struct in_ifaddr *ia; 1071541Srgrimes 108194951Srwatson IN_IFADDR_RLOCK(); 109181803Sbz if (V_subnetsarelocal) { 110194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 111194951Srwatson if ((i & ia->ia_netmask) == ia->ia_net) { 112194951Srwatson IN_IFADDR_RUNLOCK(); 1131541Srgrimes return (1); 114194951Srwatson } 115194951Srwatson } 1161541Srgrimes } else { 117194951Srwatson TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 118194951Srwatson if ((i & ia->ia_subnetmask) == ia->ia_subnet) { 119194951Srwatson IN_IFADDR_RUNLOCK(); 1201541Srgrimes return (1); 121194951Srwatson } 122194951Srwatson } 1231541Srgrimes } 124194951Srwatson IN_IFADDR_RUNLOCK(); 1251541Srgrimes return (0); 1261541Srgrimes} 1271541Srgrimes 1281541Srgrimes/* 129133486Sandre * Return 1 if an internet address is for the local host and configured 130133486Sandre * on one of its interfaces. 131133486Sandre */ 132133486Sandreint 133169454Srwatsonin_localip(struct in_addr in) 134133486Sandre{ 135133486Sandre struct in_ifaddr *ia; 136133486Sandre 137194951Srwatson IN_IFADDR_RLOCK(); 138133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 139194951Srwatson if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { 140194951Srwatson IN_IFADDR_RUNLOCK(); 141184295Sbz return (1); 142194951Srwatson } 143133486Sandre } 144194951Srwatson IN_IFADDR_RUNLOCK(); 145184295Sbz return (0); 146133486Sandre} 147133486Sandre 148133486Sandre/* 1491541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1501541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1511541Srgrimes * may be forwarded. 1521541Srgrimes */ 1531549Srgrimesint 154169454Srwatsonin_canforward(struct in_addr in) 1551541Srgrimes{ 1561541Srgrimes register u_long i = ntohl(in.s_addr); 1571541Srgrimes register u_long net; 1581541Srgrimes 159166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1601541Srgrimes return (0); 1611541Srgrimes if (IN_CLASSA(i)) { 1621541Srgrimes net = i & IN_CLASSA_NET; 1631541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1641541Srgrimes return (0); 1651541Srgrimes } 1661541Srgrimes return (1); 1671541Srgrimes} 1681541Srgrimes 1691541Srgrimes/* 1701541Srgrimes * Trim a mask in a sockaddr 1711541Srgrimes */ 17212296Sphkstatic void 173169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1741541Srgrimes{ 1751541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1761541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1771541Srgrimes 1781541Srgrimes ap->sin_len = 0; 1794127Swollman while (--cp >= cplim) 180133874Srwatson if (*cp) { 1811541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1821541Srgrimes break; 1831541Srgrimes } 1841541Srgrimes} 1851541Srgrimes 18655009Sshinstatic int 18755009Sshinin_mask2len(mask) 18855009Sshin struct in_addr *mask; 18955009Sshin{ 19055009Sshin int x, y; 19155009Sshin u_char *p; 19255009Sshin 19355009Sshin p = (u_char *)mask; 19455009Sshin for (x = 0; x < sizeof(*mask); x++) { 19555009Sshin if (p[x] != 0xff) 19655009Sshin break; 19755009Sshin } 19855009Sshin y = 0; 19955009Sshin if (x < sizeof(*mask)) { 20055009Sshin for (y = 0; y < 8; y++) { 20155009Sshin if ((p[x] & (0x80 >> y)) == 0) 20255009Sshin break; 20355009Sshin } 20455009Sshin } 205184295Sbz return (x * 8 + y); 20655009Sshin} 20755009Sshin 20855009Sshinstatic void 209169454Srwatsonin_len2mask(struct in_addr *mask, int len) 21055009Sshin{ 21155009Sshin int i; 21255009Sshin u_char *p; 21355009Sshin 21455009Sshin p = (u_char *)mask; 21555009Sshin bzero(mask, sizeof(*mask)); 21655009Sshin for (i = 0; i < len / 8; i++) 21755009Sshin p[i] = 0xff; 21855009Sshin if (len % 8) 21955009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 22055009Sshin} 22155009Sshin 2221541Srgrimes/* 2231541Srgrimes * Generic internet control operations (ioctl's). 224191443Srwatson * 225191443Srwatson * ifp is NULL if not an interface-specific ioctl. 2261541Srgrimes */ 2271541Srgrimes/* ARGSUSED */ 2281549Srgrimesint 229169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 230169454Srwatson struct thread *td) 2311541Srgrimes{ 2321541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 233184295Sbz register struct in_ifaddr *ia, *iap; 2341541Srgrimes register struct ifaddr *ifa; 235168032Sbms struct in_addr allhosts_addr; 23684102Sjlemon struct in_addr dst; 237189592Sbms struct in_ifinfo *ii; 2381541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 2391541Srgrimes struct sockaddr_in oldaddr; 240194951Srwatson int error, hostIsNew, iaIsNew, maskIsNew; 241168032Sbms int iaIsFirst; 2421541Srgrimes 243184295Sbz ia = NULL; 244168032Sbms iaIsFirst = 0; 24587124Sbrian iaIsNew = 0; 246168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 24787124Sbrian 248191443Srwatson /* 249191443Srwatson * Filter out ioctls we implement directly; forward the rest on to 250191443Srwatson * in_lifaddr_ioctl() and ifp->if_ioctl(). 251191443Srwatson */ 25255009Sshin switch (cmd) { 253191443Srwatson case SIOCAIFADDR: 254191443Srwatson case SIOCDIFADDR: 255191443Srwatson case SIOCGIFADDR: 256191443Srwatson case SIOCGIFBRDADDR: 257191443Srwatson case SIOCGIFDSTADDR: 258191443Srwatson case SIOCGIFNETMASK: 259191443Srwatson case SIOCSIFADDR: 260191443Srwatson case SIOCSIFBRDADDR: 261191443Srwatson case SIOCSIFDSTADDR: 262191443Srwatson case SIOCSIFNETMASK: 263191443Srwatson break; 264191443Srwatson 26555009Sshin case SIOCALIFADDR: 266164033Srwatson if (td != NULL) { 267164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 268164033Srwatson if (error) 269164033Srwatson return (error); 270164033Srwatson } 271184295Sbz if (ifp == NULL) 272184295Sbz return (EINVAL); 273164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 274164033Srwatson 27555009Sshin case SIOCDLIFADDR: 276164033Srwatson if (td != NULL) { 277164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 278164033Srwatson if (error) 279164033Srwatson return (error); 280164033Srwatson } 281184295Sbz if (ifp == NULL) 282184295Sbz return (EINVAL); 283164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 284164033Srwatson 28555009Sshin case SIOCGLIFADDR: 286184295Sbz if (ifp == NULL) 287184295Sbz return (EINVAL); 28883366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 289191443Srwatson 290191443Srwatson default: 291191443Srwatson if (ifp == NULL || ifp->if_ioctl == NULL) 292191443Srwatson return (EOPNOTSUPP); 293191443Srwatson return ((*ifp->if_ioctl)(ifp, cmd, data)); 29455009Sshin } 29555009Sshin 296191443Srwatson if (ifp == NULL) 297191443Srwatson return (EADDRNOTAVAIL); 298191443Srwatson 2991541Srgrimes /* 300191456Srwatson * Security checks before we get involved in any work. 301191456Srwatson */ 302191456Srwatson switch (cmd) { 303191456Srwatson case SIOCAIFADDR: 304191456Srwatson case SIOCSIFADDR: 305191456Srwatson case SIOCSIFBRDADDR: 306191456Srwatson case SIOCSIFNETMASK: 307191456Srwatson case SIOCSIFDSTADDR: 308191456Srwatson if (td != NULL) { 309191456Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 310191456Srwatson if (error) 311191456Srwatson return (error); 312191456Srwatson } 313191456Srwatson break; 314191456Srwatson 315191456Srwatson case SIOCDIFADDR: 316191456Srwatson if (td != NULL) { 317191456Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 318191456Srwatson if (error) 319191456Srwatson return (error); 320191456Srwatson } 321191456Srwatson break; 322191456Srwatson } 323191456Srwatson 324191456Srwatson /* 3251541Srgrimes * Find address for this interface, if it exists. 32614632Sfenner * 327191443Srwatson * If an alias address was specified, find that one instead of the 328191443Srwatson * first one on the interface, if possible. 3291541Srgrimes */ 330191443Srwatson dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 331194951Srwatson IN_IFADDR_RLOCK(); 332191443Srwatson LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { 333191443Srwatson if (iap->ia_ifp == ifp && 334191443Srwatson iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 335191443Srwatson if (td == NULL || prison_check_ip4(td->td_ucred, 336191443Srwatson &dst) == 0) 337191443Srwatson ia = iap; 338191443Srwatson break; 339191443Srwatson } 340191443Srwatson } 341194760Srwatson if (ia != NULL) 342194760Srwatson ifa_ref(&ia->ia_ifa); 343194951Srwatson IN_IFADDR_RUNLOCK(); 344191443Srwatson if (ia == NULL) { 345194760Srwatson IF_ADDR_LOCK(ifp); 346191443Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 347191443Srwatson iap = ifatoia(ifa); 348191443Srwatson if (iap->ia_addr.sin_family == AF_INET) { 349191443Srwatson if (td != NULL && 350191443Srwatson prison_check_ip4(td->td_ucred, 351191443Srwatson &iap->ia_addr.sin_addr) != 0) 352191443Srwatson continue; 353191443Srwatson ia = iap; 35484102Sjlemon break; 35584102Sjlemon } 356191443Srwatson } 357194760Srwatson if (ia != NULL) 358194760Srwatson ifa_ref(&ia->ia_ifa); 359194760Srwatson IF_ADDR_UNLOCK(ifp); 36084102Sjlemon } 361191443Srwatson if (ia == NULL) 362191443Srwatson iaIsFirst = 1; 3631541Srgrimes 364191500Srwatson error = 0; 3651541Srgrimes switch (cmd) { 3661541Srgrimes case SIOCAIFADDR: 3671541Srgrimes case SIOCDIFADDR: 3688071Swollman if (ifra->ifra_addr.sin_family == AF_INET) { 369194760Srwatson struct in_ifaddr *oia; 370194760Srwatson 371194951Srwatson IN_IFADDR_RLOCK(); 37271999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 3738071Swollman if (ia->ia_ifp == ifp && 3748071Swollman ia->ia_addr.sin_addr.s_addr == 3758071Swollman ifra->ifra_addr.sin_addr.s_addr) 3768071Swollman break; 3778071Swollman } 378194760Srwatson if (ia != NULL && ia != oia) 379194760Srwatson ifa_ref(&ia->ia_ifa); 380194760Srwatson if (oia != NULL && ia != oia) 381194760Srwatson ifa_free(&oia->ia_ifa); 382194951Srwatson IN_IFADDR_RUNLOCK(); 3838876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 3848071Swollman && (cmd == SIOCAIFADDR) 3858071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 3868071Swollman == INADDR_ANY)) { 387191500Srwatson error = EDESTADDRREQ; 388194760Srwatson goto out; 3898071Swollman } 3901541Srgrimes } 391191500Srwatson if (cmd == SIOCDIFADDR && ia == NULL) { 392191500Srwatson error = EADDRNOTAVAIL; 393194760Srwatson goto out; 394191500Srwatson } 3951541Srgrimes /* FALLTHROUGH */ 3961541Srgrimes case SIOCSIFADDR: 3971541Srgrimes case SIOCSIFNETMASK: 3981541Srgrimes case SIOCSIFDSTADDR: 399184295Sbz if (ia == NULL) { 40020407Swollman ia = (struct in_ifaddr *) 401191500Srwatson malloc(sizeof *ia, M_IFADDR, M_NOWAIT | 402191500Srwatson M_ZERO); 403191500Srwatson if (ia == NULL) { 404191500Srwatson error = ENOBUFS; 405194760Srwatson goto out; 406191500Srwatson } 407191500Srwatson 40820407Swollman ifa = &ia->ia_ifa; 409194602Srwatson ifa_init(ifa); 41020407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 41120407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 41220407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 413108033Shsu 4141541Srgrimes ia->ia_sockmask.sin_len = 8; 41585740Sdes ia->ia_sockmask.sin_family = AF_INET; 4161541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 4171541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 4181541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 4191541Srgrimes } 4201541Srgrimes ia->ia_ifp = ifp; 421151824Sglebius 422194760Srwatson ifa_ref(ifa); /* if_addrhead */ 423194760Srwatson IF_ADDR_LOCK(ifp); 424191285Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 425194760Srwatson IF_ADDR_UNLOCK(ifp); 426194760Srwatson ifa_ref(ifa); /* in_ifaddrhead */ 427194951Srwatson IN_IFADDR_WLOCK(); 428181803Sbz TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 429194951Srwatson IN_IFADDR_WUNLOCK(); 43087124Sbrian iaIsNew = 1; 4311541Srgrimes } 4321541Srgrimes break; 4331541Srgrimes 4341541Srgrimes case SIOCSIFBRDADDR: 4351541Srgrimes case SIOCGIFADDR: 4361541Srgrimes case SIOCGIFNETMASK: 4371541Srgrimes case SIOCGIFDSTADDR: 4381541Srgrimes case SIOCGIFBRDADDR: 439191500Srwatson if (ia == NULL) { 440191500Srwatson error = EADDRNOTAVAIL; 441194760Srwatson goto out; 442191500Srwatson } 4431541Srgrimes break; 4441541Srgrimes } 445191500Srwatson 446191500Srwatson /* 447194760Srwatson * Most paths in this switch return directly or via out. Only paths 448194760Srwatson * that remove the address break in order to hit common removal code. 449191500Srwatson */ 4501541Srgrimes switch (cmd) { 4511541Srgrimes case SIOCGIFADDR: 4521541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 453194760Srwatson goto out; 4541541Srgrimes 4551541Srgrimes case SIOCGIFBRDADDR: 456191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 457191500Srwatson error = EINVAL; 458194760Srwatson goto out; 459191500Srwatson } 4601541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 461194760Srwatson goto out; 4621541Srgrimes 4631541Srgrimes case SIOCGIFDSTADDR: 464191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 465191500Srwatson error = EINVAL; 466194760Srwatson goto out; 467191500Srwatson } 4681541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 469194760Srwatson goto out; 4701541Srgrimes 4711541Srgrimes case SIOCGIFNETMASK: 4721541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 473194760Srwatson goto out; 4741541Srgrimes 4751541Srgrimes case SIOCSIFDSTADDR: 476191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 477191500Srwatson error = EINVAL; 478194760Srwatson goto out; 479191500Srwatson } 4801541Srgrimes oldaddr = ia->ia_dstaddr; 4811541Srgrimes ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 482184295Sbz if (ifp->if_ioctl != NULL) { 483146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 484146883Siedowse (caddr_t)ia); 485146883Siedowse if (error) { 486146883Siedowse ia->ia_dstaddr = oldaddr; 487194760Srwatson goto out; 488146883Siedowse } 4891541Srgrimes } 4901541Srgrimes if (ia->ia_flags & IFA_ROUTE) { 4911541Srgrimes ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 4921541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 4931541Srgrimes ia->ia_ifa.ifa_dstaddr = 4941541Srgrimes (struct sockaddr *)&ia->ia_dstaddr; 4951541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 4961541Srgrimes } 497194760Srwatson goto out; 4981541Srgrimes 4991541Srgrimes case SIOCSIFBRDADDR: 500191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 501191500Srwatson error = EINVAL; 502194760Srwatson goto out; 503191500Srwatson } 5041541Srgrimes ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 505194760Srwatson goto out; 5061541Srgrimes 5071541Srgrimes case SIOCSIFADDR: 50887124Sbrian error = in_ifinit(ifp, ia, 50987124Sbrian (struct sockaddr_in *) &ifr->ifr_addr, 1); 51087124Sbrian if (error != 0 && iaIsNew) 51187124Sbrian break; 512168032Sbms if (error == 0) { 513189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 514189592Sbms if (iaIsFirst && 515189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 516189592Sbms error = in_joingroup(ifp, &allhosts_addr, 517189592Sbms NULL, &ii->ii_allhosts); 518189592Sbms } 519126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 520168032Sbms } 521194760Srwatson error = 0; 522194760Srwatson goto out; 5231541Srgrimes 5241541Srgrimes case SIOCSIFNETMASK: 52585740Sdes ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 52685740Sdes ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 527194760Srwatson goto out; 5281541Srgrimes 5291541Srgrimes case SIOCAIFADDR: 5301541Srgrimes maskIsNew = 0; 5311541Srgrimes hostIsNew = 1; 5321541Srgrimes error = 0; 5331541Srgrimes if (ia->ia_addr.sin_family == AF_INET) { 5341541Srgrimes if (ifra->ifra_addr.sin_len == 0) { 5351541Srgrimes ifra->ifra_addr = ia->ia_addr; 5361541Srgrimes hostIsNew = 0; 5371541Srgrimes } else if (ifra->ifra_addr.sin_addr.s_addr == 5381541Srgrimes ia->ia_addr.sin_addr.s_addr) 5391541Srgrimes hostIsNew = 0; 5401541Srgrimes } 5411541Srgrimes if (ifra->ifra_mask.sin_len) { 542197210Sqingli /* 543197210Sqingli * QL: XXX 544197210Sqingli * Need to scrub the prefix here in case 545197210Sqingli * the issued command is SIOCAIFADDR with 546197210Sqingli * the same address, but with a different 547197210Sqingli * prefix length. And if the prefix length 548197210Sqingli * is the same as before, then the call is 549197210Sqingli * un-necessarily executed here. 550197210Sqingli */ 551222438Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 5521541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 55385740Sdes ia->ia_sockmask.sin_family = AF_INET; 5541541Srgrimes ia->ia_subnetmask = 5551541Srgrimes ntohl(ia->ia_sockmask.sin_addr.s_addr); 5561541Srgrimes maskIsNew = 1; 5571541Srgrimes } 5581541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 5591541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 560222438Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 5611541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 5621541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 5631541Srgrimes } 5641541Srgrimes if (ifra->ifra_addr.sin_family == AF_INET && 5651541Srgrimes (hostIsNew || maskIsNew)) 5661541Srgrimes error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 56787124Sbrian if (error != 0 && iaIsNew) 568201811Sqingli break; 56987124Sbrian 5701541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 5711541Srgrimes (ifra->ifra_broadaddr.sin_family == AF_INET)) 5721541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 573168032Sbms if (error == 0) { 574189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 575189592Sbms if (iaIsFirst && 576189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 577189592Sbms error = in_joingroup(ifp, &allhosts_addr, 578189592Sbms NULL, &ii->ii_allhosts); 579189592Sbms } 580126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 581168032Sbms } 582194760Srwatson goto out; 5831541Srgrimes 5841541Srgrimes case SIOCDIFADDR: 58574299Sru /* 58674299Sru * in_ifscrub kills the interface route. 58774299Sru */ 588222143Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 589191500Srwatson 59015092Sdg /* 59174299Sru * in_ifadown gets rid of all the rest of 59274299Sru * the routes. This is not quite the right 59374299Sru * thing to do, but at least if we are running 59474299Sru * a routing process they will come back. 59574299Sru */ 59676469Sru in_ifadown(&ia->ia_ifa, 1); 597126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 59887124Sbrian error = 0; 5991541Srgrimes break; 6001541Srgrimes 6011541Srgrimes default: 602191443Srwatson panic("in_control: unsupported ioctl"); 6031541Srgrimes } 60487124Sbrian 605191285Srwatson IF_ADDR_LOCK(ifp); 606213932Sbz /* Re-check that ia is still part of the list. */ 607213932Sbz TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 608213932Sbz if (ifa == &ia->ia_ifa) 609213932Sbz break; 610213932Sbz } 611213932Sbz if (ifa == NULL) { 612213932Sbz /* 613213932Sbz * If we lost the race with another thread, there is no need to 614213932Sbz * try it again for the next loop as there is no other exit 615213932Sbz * path between here and out. 616213932Sbz */ 617213932Sbz IF_ADDR_UNLOCK(ifp); 618213932Sbz error = EADDRNOTAVAIL; 619213932Sbz goto out; 620213932Sbz } 621191285Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 622191285Srwatson IF_ADDR_UNLOCK(ifp); 623194760Srwatson ifa_free(&ia->ia_ifa); /* if_addrhead */ 624194951Srwatson 625194951Srwatson IN_IFADDR_WLOCK(); 626181803Sbz TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 627168032Sbms if (ia->ia_addr.sin_family == AF_INET) { 628194760Srwatson struct in_ifaddr *if_ia; 629194760Srwatson 630154777Sandre LIST_REMOVE(ia, ia_hash); 631194951Srwatson IN_IFADDR_WUNLOCK(); 632168032Sbms /* 633168032Sbms * If this is the last IPv4 address configured on this 634168032Sbms * interface, leave the all-hosts group. 635189592Sbms * No state-change report need be transmitted. 636168032Sbms */ 637194760Srwatson if_ia = NULL; 638194760Srwatson IFP_TO_IA(ifp, if_ia); 639194760Srwatson if (if_ia == NULL) { 640189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 641168032Sbms IN_MULTI_LOCK(); 642189592Sbms if (ii->ii_allhosts) { 643189592Sbms (void)in_leavegroup_locked(ii->ii_allhosts, 644189592Sbms NULL); 645189592Sbms ii->ii_allhosts = NULL; 646189592Sbms } 647168032Sbms IN_MULTI_UNLOCK(); 648194760Srwatson } else 649194760Srwatson ifa_free(&if_ia->ia_ifa); 650194951Srwatson } else 651194951Srwatson IN_IFADDR_WUNLOCK(); 652194951Srwatson ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 653194760Srwatsonout: 654194760Srwatson if (ia != NULL) 655194760Srwatson ifa_free(&ia->ia_ifa); 65687124Sbrian return (error); 6571541Srgrimes} 6581541Srgrimes 6591541Srgrimes/* 66055009Sshin * SIOC[GAD]LIFADDR. 66155009Sshin * SIOCGLIFADDR: get first address. (?!?) 66255009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 66355009Sshin * get first address that matches the specified prefix. 66455009Sshin * SIOCALIFADDR: add the specified address. 66555009Sshin * SIOCALIFADDR with IFLR_PREFIX: 66655009Sshin * EINVAL since we can't deduce hostid part of the address. 66755009Sshin * SIOCDLIFADDR: delete the specified address. 66855009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 66955009Sshin * delete the first address that matches the specified prefix. 67055009Sshin * return values: 67155009Sshin * EINVAL on invalid parameters 67255009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 67355009Sshin * other values may be returned from in_ioctl() 67455009Sshin */ 67555009Sshinstatic int 676169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 677169454Srwatson struct ifnet *ifp, struct thread *td) 67855009Sshin{ 67955009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 68055009Sshin struct ifaddr *ifa; 68155009Sshin 68255009Sshin /* sanity checks */ 683184295Sbz if (data == NULL || ifp == NULL) { 68455009Sshin panic("invalid argument to in_lifaddr_ioctl"); 68555009Sshin /*NOTRECHED*/ 68655009Sshin } 68755009Sshin 68855009Sshin switch (cmd) { 68955009Sshin case SIOCGLIFADDR: 69055009Sshin /* address must be specified on GET with IFLR_PREFIX */ 69155009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 69255009Sshin break; 69355009Sshin /*FALLTHROUGH*/ 69455009Sshin case SIOCALIFADDR: 69555009Sshin case SIOCDLIFADDR: 69655009Sshin /* address must be specified on ADD and DELETE */ 69755917Sshin if (iflr->addr.ss_family != AF_INET) 698184295Sbz return (EINVAL); 69955917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 700184295Sbz return (EINVAL); 70155009Sshin /* XXX need improvement */ 70255917Sshin if (iflr->dstaddr.ss_family 70355917Sshin && iflr->dstaddr.ss_family != AF_INET) 704184295Sbz return (EINVAL); 70555917Sshin if (iflr->dstaddr.ss_family 70655917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 707184295Sbz return (EINVAL); 70855009Sshin break; 70955009Sshin default: /*shouldn't happen*/ 710184295Sbz return (EOPNOTSUPP); 71155009Sshin } 71255009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 713184295Sbz return (EINVAL); 71455009Sshin 71555009Sshin switch (cmd) { 71655009Sshin case SIOCALIFADDR: 71755009Sshin { 71855009Sshin struct in_aliasreq ifra; 71955009Sshin 72055009Sshin if (iflr->flags & IFLR_PREFIX) 721184295Sbz return (EINVAL); 72255009Sshin 72355009Sshin /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 72455009Sshin bzero(&ifra, sizeof(ifra)); 72555009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 72655009Sshin sizeof(ifra.ifra_name)); 72755009Sshin 72855917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 72955009Sshin 73055917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 73155009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 73255917Sshin iflr->dstaddr.ss_len); 73355009Sshin } 73455009Sshin 73555009Sshin ifra.ifra_mask.sin_family = AF_INET; 73655009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 73755009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 73855009Sshin 739184295Sbz return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 74055009Sshin } 74155009Sshin case SIOCGLIFADDR: 74255009Sshin case SIOCDLIFADDR: 74355009Sshin { 74455009Sshin struct in_ifaddr *ia; 74555009Sshin struct in_addr mask, candidate, match; 74655009Sshin struct sockaddr_in *sin; 74755009Sshin 74855009Sshin bzero(&mask, sizeof(mask)); 749170855Smjacob bzero(&match, sizeof(match)); 75055009Sshin if (iflr->flags & IFLR_PREFIX) { 75155009Sshin /* lookup a prefix rather than address. */ 75255009Sshin in_len2mask(&mask, iflr->prefixlen); 75355009Sshin 75455009Sshin sin = (struct sockaddr_in *)&iflr->addr; 75555009Sshin match.s_addr = sin->sin_addr.s_addr; 75655009Sshin match.s_addr &= mask.s_addr; 75755009Sshin 75855009Sshin /* if you set extra bits, that's wrong */ 75955009Sshin if (match.s_addr != sin->sin_addr.s_addr) 760184295Sbz return (EINVAL); 76155009Sshin 76255009Sshin } else { 763170855Smjacob /* on getting an address, take the 1st match */ 764170855Smjacob /* on deleting an address, do exact match */ 765170855Smjacob if (cmd != SIOCGLIFADDR) { 76655009Sshin in_len2mask(&mask, 32); 76755009Sshin sin = (struct sockaddr_in *)&iflr->addr; 76855009Sshin match.s_addr = sin->sin_addr.s_addr; 76955009Sshin } 77055009Sshin } 77155009Sshin 77255009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 77355009Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 77455009Sshin continue; 775170855Smjacob if (match.s_addr == 0) 77655009Sshin break; 77755009Sshin candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 77855009Sshin candidate.s_addr &= mask.s_addr; 77955009Sshin if (candidate.s_addr == match.s_addr) 78055009Sshin break; 78155009Sshin } 782184295Sbz if (ifa == NULL) 783184295Sbz return (EADDRNOTAVAIL); 78455009Sshin ia = (struct in_ifaddr *)ifa; 78555009Sshin 78655009Sshin if (cmd == SIOCGLIFADDR) { 78755009Sshin /* fill in the if_laddrreq structure */ 78855009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 78955009Sshin 79055009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 79155009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 79255009Sshin ia->ia_dstaddr.sin_len); 79355009Sshin } else 79455009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 79555009Sshin 79655009Sshin iflr->prefixlen = 79755009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 79855009Sshin 79955009Sshin iflr->flags = 0; /*XXX*/ 80055009Sshin 801184295Sbz return (0); 80255009Sshin } else { 80355009Sshin struct in_aliasreq ifra; 80455009Sshin 80555009Sshin /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 80655009Sshin bzero(&ifra, sizeof(ifra)); 80755009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 80855009Sshin sizeof(ifra.ifra_name)); 80955009Sshin 81055009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 81155009Sshin ia->ia_addr.sin_len); 81255009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 81355009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 81455009Sshin ia->ia_dstaddr.sin_len); 81555009Sshin } 81655009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 81755009Sshin ia->ia_sockmask.sin_len); 81855009Sshin 819184295Sbz return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 820184295Sbz ifp, td)); 82155009Sshin } 82255009Sshin } 82355009Sshin } 82455009Sshin 825184295Sbz return (EOPNOTSUPP); /*just for safety*/ 82655009Sshin} 82755009Sshin 82855009Sshin/* 8291541Srgrimes * Delete any existing route for an interface. 8301541Srgrimes */ 83122672Swollmanvoid 832222143Sqingliin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia, u_int flags) 8331541Srgrimes{ 834169454Srwatson 835222143Sqingli in_scrubprefix(ia, flags); 8361541Srgrimes} 8371541Srgrimes 8381541Srgrimes/* 8391541Srgrimes * Initialize an interface's internet address 8401541Srgrimes * and routing table entry. 8411541Srgrimes */ 84212296Sphkstatic int 843169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 844169454Srwatson int scrub) 8451541Srgrimes{ 8461541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 8471541Srgrimes struct sockaddr_in oldaddr; 84894326Sbrian int s = splimp(), flags = RTF_UP, error = 0; 8491541Srgrimes 8501541Srgrimes oldaddr = ia->ia_addr; 851105748Ssuz if (oldaddr.sin_family == AF_INET) 852105748Ssuz LIST_REMOVE(ia, ia_hash); 8531541Srgrimes ia->ia_addr = *sin; 854194951Srwatson if (ia->ia_addr.sin_family == AF_INET) { 855194951Srwatson IN_IFADDR_WLOCK(); 856105748Ssuz LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 857105748Ssuz ia, ia_hash); 858194951Srwatson IN_IFADDR_WUNLOCK(); 859194951Srwatson } 8601541Srgrimes /* 8611541Srgrimes * Give the interface a chance to initialize 8621541Srgrimes * if this is its first address, 8631541Srgrimes * and to validate the address if necessary. 8641541Srgrimes */ 865184295Sbz if (ifp->if_ioctl != NULL) { 866146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 867146883Siedowse if (error) { 868146883Siedowse splx(s); 869146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 870146883Siedowse ia->ia_addr = oldaddr; 871194951Srwatson IN_IFADDR_WLOCK(); 872146883Siedowse if (ia->ia_addr.sin_family == AF_INET) 873146883Siedowse LIST_INSERT_HEAD(INADDR_HASH( 874146883Siedowse ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 875179971Sgonzo else 876179971Sgonzo /* 877179971Sgonzo * If oldaddr family is not AF_INET (e.g. 878179971Sgonzo * interface has been just created) in_control 879179971Sgonzo * does not call LIST_REMOVE, and we end up 880179971Sgonzo * with bogus ia entries in hash 881179971Sgonzo */ 882179971Sgonzo LIST_REMOVE(ia, ia_hash); 883194951Srwatson IN_IFADDR_WUNLOCK(); 884146883Siedowse return (error); 885146883Siedowse } 8861541Srgrimes } 8871541Srgrimes splx(s); 8881541Srgrimes if (scrub) { 8891541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 890222143Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 8911541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 8921541Srgrimes } 8931541Srgrimes if (IN_CLASSA(i)) 8941541Srgrimes ia->ia_netmask = IN_CLASSA_NET; 8951541Srgrimes else if (IN_CLASSB(i)) 8961541Srgrimes ia->ia_netmask = IN_CLASSB_NET; 8971541Srgrimes else 8981541Srgrimes ia->ia_netmask = IN_CLASSC_NET; 8991541Srgrimes /* 9001541Srgrimes * The subnet mask usually includes at least the standard network part, 9011541Srgrimes * but may may be smaller in the case of supernetting. 9021541Srgrimes * If it is set, we believe it. 9031541Srgrimes */ 9041541Srgrimes if (ia->ia_subnetmask == 0) { 9051541Srgrimes ia->ia_subnetmask = ia->ia_netmask; 9061541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 9071541Srgrimes } else 9081541Srgrimes ia->ia_netmask &= ia->ia_subnetmask; 9091541Srgrimes ia->ia_net = i & ia->ia_netmask; 9101541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 9111541Srgrimes in_socktrim(&ia->ia_sockmask); 9121541Srgrimes /* 913143868Sglebius * XXX: carp(4) does not have interface route 914143868Sglebius */ 915143868Sglebius if (ifp->if_type == IFT_CARP) 916143868Sglebius return (0); 917143868Sglebius /* 9181541Srgrimes * Add route for the network. 9191541Srgrimes */ 9201541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 9211541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 9221541Srgrimes ia->ia_broadaddr.sin_addr.s_addr = 9231541Srgrimes htonl(ia->ia_subnet | ~ia->ia_subnetmask); 9241541Srgrimes ia->ia_netbroadcast.s_addr = 9251541Srgrimes htonl(ia->ia_net | ~ ia->ia_netmask); 9261541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 927137833Smlaier ia->ia_dstaddr = ia->ia_addr; 9281541Srgrimes flags |= RTF_HOST; 9291541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 9301541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 9311541Srgrimes return (0); 9321541Srgrimes flags |= RTF_HOST; 9331541Srgrimes } 934137628Smlaier if ((error = in_addprefix(ia, flags)) != 0) 935137628Smlaier return (error); 93694326Sbrian 937192085Sqingli if (ia->ia_addr.sin_addr.s_addr == INADDR_ANY) 938192085Sqingli return (0); 939192085Sqingli 940203401Sqingli if (ifp->if_flags & IFF_POINTOPOINT) { 941203401Sqingli if (ia->ia_dstaddr.sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 942203401Sqingli return (0); 943203401Sqingli } 944203401Sqingli 945203401Sqingli 946192011Sqingli /* 947192011Sqingli * add a loopback route to self 948192011Sqingli */ 949201282Sqingli if (V_useloopback && !(ifp->if_flags & IFF_LOOPBACK)) { 950201282Sqingli struct route ia_ro; 951201282Sqingli 952201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 953201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = ia->ia_addr; 954201282Sqingli rtalloc_ign_fib(&ia_ro, 0, 0); 955201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 956201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 957201282Sqingli RT_LOCK(ia_ro.ro_rt); 958201282Sqingli RT_ADDREF(ia_ro.ro_rt); 959201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 960201282Sqingli } else 961201282Sqingli error = ifa_add_loopback_route((struct ifaddr *)ia, 962197227Sqingli (struct sockaddr *)&ia->ia_addr); 963201282Sqingli if (error == 0) 964201282Sqingli ia->ia_flags |= IFA_RTSELF; 965201282Sqingli if (ia_ro.ro_rt != NULL) 966201282Sqingli RTFREE(ia_ro.ro_rt); 967201282Sqingli } 968192011Sqingli 9691541Srgrimes return (error); 9701541Srgrimes} 9711541Srgrimes 972137628Smlaier#define rtinitflags(x) \ 973137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 974137628Smlaier ? RTF_HOST : 0) 975201285Sqingli 976137628Smlaier/* 977201285Sqingli * Generate a routing message when inserting or deleting 978201285Sqingli * an interface address alias. 979201285Sqingli */ 980201285Sqinglistatic void in_addralias_rtmsg(int cmd, struct in_addr *prefix, 981201285Sqingli struct in_ifaddr *target) 982201285Sqingli{ 983201285Sqingli struct route pfx_ro; 984201285Sqingli struct sockaddr_in *pfx_addr; 985201285Sqingli struct rtentry msg_rt; 986201285Sqingli 987201285Sqingli /* QL: XXX 988201285Sqingli * This is a bit questionable because there is no 989201285Sqingli * additional route entry added/deleted for an address 990201285Sqingli * alias. Therefore this route report is inaccurate. 991201285Sqingli */ 992201285Sqingli bzero(&pfx_ro, sizeof(pfx_ro)); 993201285Sqingli pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); 994201285Sqingli pfx_addr->sin_len = sizeof(*pfx_addr); 995201285Sqingli pfx_addr->sin_family = AF_INET; 996201285Sqingli pfx_addr->sin_addr = *prefix; 997201285Sqingli rtalloc_ign_fib(&pfx_ro, 0, 0); 998201285Sqingli if (pfx_ro.ro_rt != NULL) { 999201285Sqingli msg_rt = *pfx_ro.ro_rt; 1000201285Sqingli 1001201285Sqingli /* QL: XXX 1002201285Sqingli * Point the gateway to the new interface 1003201285Sqingli * address as if a new prefix route entry has 1004201285Sqingli * been added through the new address alias. 1005201285Sqingli * All other parts of the rtentry is accurate, 1006201285Sqingli * e.g., rt_key, rt_mask, rt_ifp etc. 1007201285Sqingli */ 1008201285Sqingli msg_rt.rt_gateway = 1009201285Sqingli (struct sockaddr *)&target->ia_addr; 1010201285Sqingli rt_newaddrmsg(cmd, 1011201285Sqingli (struct ifaddr *)target, 1012201285Sqingli 0, &msg_rt); 1013201285Sqingli RTFREE(pfx_ro.ro_rt); 1014201285Sqingli } 1015201285Sqingli return; 1016201285Sqingli} 1017201285Sqingli 1018201285Sqingli/* 1019170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 1020137628Smlaier */ 1021137628Smlaierstatic int 1022169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 1023137628Smlaier{ 1024137628Smlaier struct in_ifaddr *ia; 1025151555Sglebius struct in_addr prefix, mask, p, m; 1026137628Smlaier int error; 10271541Srgrimes 1028170855Smjacob if ((flags & RTF_HOST) != 0) { 1029137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1030170855Smjacob mask.s_addr = 0; 1031170855Smjacob } else { 1032137628Smlaier prefix = target->ia_addr.sin_addr; 1033137628Smlaier mask = target->ia_sockmask.sin_addr; 1034137628Smlaier prefix.s_addr &= mask.s_addr; 1035137628Smlaier } 1036137628Smlaier 1037194951Srwatson IN_IFADDR_RLOCK(); 1038181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1039151555Sglebius if (rtinitflags(ia)) { 1040137628Smlaier p = ia->ia_addr.sin_addr; 1041151555Sglebius 1042151555Sglebius if (prefix.s_addr != p.s_addr) 1043151555Sglebius continue; 1044151555Sglebius } else { 1045151555Sglebius p = ia->ia_addr.sin_addr; 1046151555Sglebius m = ia->ia_sockmask.sin_addr; 1047151555Sglebius p.s_addr &= m.s_addr; 1048151555Sglebius 1049151555Sglebius if (prefix.s_addr != p.s_addr || 1050151555Sglebius mask.s_addr != m.s_addr) 1051151555Sglebius continue; 1052137628Smlaier } 1053137628Smlaier 1054137628Smlaier /* 1055137628Smlaier * If we got a matching prefix route inserted by other 1056137628Smlaier * interface address, we are done here. 1057137628Smlaier */ 1058149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 1059204902Sqingli#ifdef RADIX_MPATH 1060204902Sqingli if (ia->ia_addr.sin_addr.s_addr == 1061212209Sbz target->ia_addr.sin_addr.s_addr) { 1062212209Sbz IN_IFADDR_RUNLOCK(); 1063204902Sqingli return (EEXIST); 1064212209Sbz } else 1065204902Sqingli break; 1066204902Sqingli#endif 1067181803Sbz if (V_sameprefixcarponly && 1068149221Sglebius target->ia_ifp->if_type != IFT_CARP && 1069194951Srwatson ia->ia_ifp->if_type != IFT_CARP) { 1070194951Srwatson IN_IFADDR_RUNLOCK(); 1071149221Sglebius return (EEXIST); 1072194951Srwatson } else { 1073201285Sqingli in_addralias_rtmsg(RTM_ADD, &prefix, target); 1074194951Srwatson IN_IFADDR_RUNLOCK(); 1075149221Sglebius return (0); 1076194951Srwatson } 1077149221Sglebius } 1078137628Smlaier } 1079194951Srwatson IN_IFADDR_RUNLOCK(); 1080137628Smlaier 1081137628Smlaier /* 1082137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 1083137628Smlaier */ 1084137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 1085137628Smlaier if (!error) 1086137628Smlaier target->ia_flags |= IFA_ROUTE; 1087184295Sbz return (error); 1088137628Smlaier} 1089137628Smlaier 1090186119Sqingliextern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); 1091186119Sqingli 10921541Srgrimes/* 1093137628Smlaier * If there is no other address in the system that can serve a route to the 1094137628Smlaier * same prefix, remove the route. Hand over the route to the new address 1095137628Smlaier * otherwise. 1096137628Smlaier */ 1097137628Smlaierstatic int 1098222143Sqingliin_scrubprefix(struct in_ifaddr *target, u_int flags) 1099137628Smlaier{ 1100137628Smlaier struct in_ifaddr *ia; 1101137628Smlaier struct in_addr prefix, mask, p; 1102201282Sqingli int error = 0; 1103192476Sqingli struct sockaddr_in prefix0, mask0; 1104137628Smlaier 1105195914Sqingli /* 1106195914Sqingli * Remove the loopback route to the interface address. 1107195914Sqingli * The "useloopback" setting is not consulted because if the 1108195914Sqingli * user configures an interface address, turns off this 1109195914Sqingli * setting, and then tries to delete that interface address, 1110195914Sqingli * checking the current setting of "useloopback" would leave 1111195914Sqingli * that interface address loopback route untouched, which 1112195914Sqingli * would be wrong. Therefore the interface address loopback route 1113195914Sqingli * deletion is unconditional. 1114195914Sqingli */ 1115192085Sqingli if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && 1116201282Sqingli !(target->ia_ifp->if_flags & IFF_LOOPBACK) && 1117201282Sqingli (target->ia_flags & IFA_RTSELF)) { 1118201282Sqingli struct route ia_ro; 1119201282Sqingli int freeit = 0; 1120201282Sqingli 1121201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 1122201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = target->ia_addr; 1123201282Sqingli rtalloc_ign_fib(&ia_ro, 0, 0); 1124201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 1125201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 1126201282Sqingli RT_LOCK(ia_ro.ro_rt); 1127201282Sqingli if (ia_ro.ro_rt->rt_refcnt <= 1) 1128201282Sqingli freeit = 1; 1129201282Sqingli else 1130201282Sqingli RT_REMREF(ia_ro.ro_rt); 1131201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 1132201282Sqingli } 1133222143Sqingli if (freeit && (flags & LLE_STATIC)) { 1134201282Sqingli error = ifa_del_loopback_route((struct ifaddr *)target, 1135197227Sqingli (struct sockaddr *)&target->ia_addr); 1136222143Sqingli if (error == 0) 1137222143Sqingli target->ia_flags &= ~IFA_RTSELF; 1138222143Sqingli } 1139222143Sqingli if (flags & LLE_STATIC) 1140222143Sqingli /* remove arp cache */ 1141222143Sqingli arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 1142192011Sqingli } 1143192011Sqingli 1144137628Smlaier if (rtinitflags(target)) 1145137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1146137628Smlaier else { 1147137628Smlaier prefix = target->ia_addr.sin_addr; 1148137628Smlaier mask = target->ia_sockmask.sin_addr; 1149137628Smlaier prefix.s_addr &= mask.s_addr; 1150137628Smlaier } 1151137628Smlaier 1152201285Sqingli if ((target->ia_flags & IFA_ROUTE) == 0) { 1153201285Sqingli in_addralias_rtmsg(RTM_DELETE, &prefix, target); 1154201285Sqingli return (0); 1155201285Sqingli } 1156201285Sqingli 1157194951Srwatson IN_IFADDR_RLOCK(); 1158181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1159137628Smlaier if (rtinitflags(ia)) 1160137628Smlaier p = ia->ia_dstaddr.sin_addr; 1161137628Smlaier else { 1162137628Smlaier p = ia->ia_addr.sin_addr; 1163137628Smlaier p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 1164137628Smlaier } 1165137628Smlaier 1166137628Smlaier if (prefix.s_addr != p.s_addr) 1167137628Smlaier continue; 1168137628Smlaier 1169137628Smlaier /* 1170137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 1171137628Smlaier * the route itself to it. Make sure that routing daemons 1172137628Smlaier * get a heads-up. 1173143868Sglebius * 1174211157Swill * XXX: a special case for carp(4) interface - this should 1175211157Swill * be more generally specified as an interface that 1176211157Swill * doesn't support such action. 1177137628Smlaier */ 1178143868Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0 1179219828Spluknet && (ia->ia_ifp->if_type != IFT_CARP)) { 1180219828Spluknet ifa_ref(&ia->ia_ifa); 1181194951Srwatson IN_IFADDR_RUNLOCK(); 1182222438Sqingli error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, 1183137628Smlaier rtinitflags(target)); 1184222438Sqingli if (error == 0) 1185222438Sqingli target->ia_flags &= ~IFA_ROUTE; 1186222438Sqingli else 1187222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, old prefix delete failed\n", 1188222438Sqingli error); 1189137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 1190137628Smlaier rtinitflags(ia) | RTF_UP); 1191137628Smlaier if (error == 0) 1192137628Smlaier ia->ia_flags |= IFA_ROUTE; 1193222438Sqingli else 1194222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, new prefix add failed\n", 1195222438Sqingli error); 1196219828Spluknet ifa_free(&ia->ia_ifa); 1197184295Sbz return (error); 1198137628Smlaier } 1199137628Smlaier } 1200194951Srwatson IN_IFADDR_RUNLOCK(); 1201137628Smlaier 1202137628Smlaier /* 1203192476Sqingli * remove all L2 entries on the given prefix 1204192476Sqingli */ 1205192476Sqingli bzero(&prefix0, sizeof(prefix0)); 1206192476Sqingli prefix0.sin_len = sizeof(prefix0); 1207192476Sqingli prefix0.sin_family = AF_INET; 1208192476Sqingli prefix0.sin_addr.s_addr = target->ia_subnet; 1209192476Sqingli bzero(&mask0, sizeof(mask0)); 1210192476Sqingli mask0.sin_len = sizeof(mask0); 1211192476Sqingli mask0.sin_family = AF_INET; 1212192476Sqingli mask0.sin_addr.s_addr = target->ia_subnetmask; 1213192476Sqingli lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, 1214222143Sqingli (struct sockaddr *)&mask0, flags); 1215192476Sqingli 1216192476Sqingli /* 1217137628Smlaier * As no-one seem to have this prefix, we can remove the route. 1218137628Smlaier */ 1219222438Sqingli error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 1220222438Sqingli if (error == 0) 1221222438Sqingli target->ia_flags &= ~IFA_ROUTE; 1222222438Sqingli else 1223222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, prefix delete failed\n", error); 1224222438Sqingli return (error); 1225137628Smlaier} 1226137628Smlaier 1227137628Smlaier#undef rtinitflags 1228137628Smlaier 1229137628Smlaier/* 12301541Srgrimes * Return 1 if the address might be a local broadcast address. 12311541Srgrimes */ 12321549Srgrimesint 1233169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 12341541Srgrimes{ 12351541Srgrimes register struct ifaddr *ifa; 12361541Srgrimes u_long t; 12371541Srgrimes 12381541Srgrimes if (in.s_addr == INADDR_BROADCAST || 12391541Srgrimes in.s_addr == INADDR_ANY) 1240184295Sbz return (1); 12411541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 1242184295Sbz return (0); 12431541Srgrimes t = ntohl(in.s_addr); 12441541Srgrimes /* 12451541Srgrimes * Look through the list of addresses for a match 12461541Srgrimes * with a broadcast address. 12471541Srgrimes */ 12481541Srgrimes#define ia ((struct in_ifaddr *)ifa) 124974362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 12501541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 12511541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 12521541Srgrimes in.s_addr == ia->ia_netbroadcast.s_addr || 12531541Srgrimes /* 12541541Srgrimes * Check for old-style (host 0) broadcast. 12551541Srgrimes */ 125613351Sguido t == ia->ia_subnet || t == ia->ia_net) && 125713351Sguido /* 125813351Sguido * Check for an all one subnetmask. These 125913351Sguido * only exist when an interface gets a secondary 126013351Sguido * address. 126113351Sguido */ 126213351Sguido ia->ia_subnetmask != (u_long)0xffffffff) 1263184295Sbz return (1); 12641541Srgrimes return (0); 12651541Srgrimes#undef ia 12661541Srgrimes} 1267167729Sbms 12681541Srgrimes/* 1269189592Sbms * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1270189592Sbms */ 1271189592Sbmsvoid 1272189592Sbmsin_ifdetach(struct ifnet *ifp) 1273189592Sbms{ 1274189592Sbms 1275189592Sbms in_pcbpurgeif0(&V_ripcbinfo, ifp); 1276189592Sbms in_pcbpurgeif0(&V_udbinfo, ifp); 1277189592Sbms in_purgemaddrs(ifp); 1278189592Sbms} 1279189592Sbms 1280189592Sbms/* 1281167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 1282167729Sbms * multicast address records, associated with ifp. 1283189592Sbms * XXX It looks like domifdetach runs AFTER the link layer cleanup. 1284189931Sbms * XXX This should not race with ifma_protospec being set during 1285189931Sbms * a new allocation, if it does, we have bigger problems. 1286162718Sbms */ 1287167729Sbmsstatic void 1288167729Sbmsin_purgemaddrs(struct ifnet *ifp) 1289162718Sbms{ 1290189592Sbms LIST_HEAD(,in_multi) purgeinms; 1291189592Sbms struct in_multi *inm, *tinm; 1292189592Sbms struct ifmultiaddr *ifma; 1293162718Sbms 1294189592Sbms LIST_INIT(&purgeinms); 1295162718Sbms IN_MULTI_LOCK(); 1296189592Sbms 1297189592Sbms /* 1298189592Sbms * Extract list of in_multi associated with the detaching ifp 1299189592Sbms * which the PF_INET layer is about to release. 1300189592Sbms * We need to do this as IF_ADDR_LOCK() may be re-acquired 1301189592Sbms * by code further down. 1302189592Sbms */ 1303189592Sbms IF_ADDR_LOCK(ifp); 1304189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1305189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 1306189931Sbms ifma->ifma_protospec == NULL) 1307189592Sbms continue; 1308189931Sbms#if 0 1309189931Sbms KASSERT(ifma->ifma_protospec != NULL, 1310189931Sbms ("%s: ifma_protospec is NULL", __func__)); 1311189931Sbms#endif 1312189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 1313189592Sbms LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 1314162718Sbms } 1315189592Sbms IF_ADDR_UNLOCK(ifp); 1316150296Srwatson 1317189592Sbms LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 1318191476Srwatson LIST_REMOVE(inm, inm_link); 1319189592Sbms inm_release_locked(inm); 1320189592Sbms } 1321189592Sbms igmp_ifdetach(ifp); 1322150296Srwatson 1323189592Sbms IN_MULTI_UNLOCK(); 1324150296Srwatson} 1325186119Sqingli 1326186119Sqingli#include <net/if_dl.h> 1327186119Sqingli#include <netinet/if_ether.h> 1328186119Sqingli 1329186119Sqinglistruct in_llentry { 1330186119Sqingli struct llentry base; 1331186119Sqingli struct sockaddr_in l3_addr4; 1332186119Sqingli}; 1333186119Sqingli 1334186119Sqinglistatic struct llentry * 1335186119Sqingliin_lltable_new(const struct sockaddr *l3addr, u_int flags) 1336186119Sqingli{ 1337186119Sqingli struct in_llentry *lle; 1338186119Sqingli 1339186119Sqingli lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); 1340186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 1341186119Sqingli return NULL; 1342186119Sqingli 1343186119Sqingli callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); 1344186119Sqingli /* 1345186119Sqingli * For IPv4 this will trigger "arpresolve" to generate 1346186119Sqingli * an ARP request. 1347186119Sqingli */ 1348216075Sglebius lle->base.la_expire = time_uptime; /* mark expired */ 1349186119Sqingli lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1350186119Sqingli lle->base.lle_refcnt = 1; 1351186119Sqingli LLE_LOCK_INIT(&lle->base); 1352186119Sqingli return &lle->base; 1353186119Sqingli} 1354186119Sqingli 1355186119Sqingli/* 1356186119Sqingli * Deletes an address from the address table. 1357186119Sqingli * This function is called by the timer functions 1358186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 1359186119Sqingli * the caller does the locking. 1360186119Sqingli */ 1361186119Sqinglistatic void 1362186119Sqingliin_lltable_free(struct lltable *llt, struct llentry *lle) 1363186119Sqingli{ 1364186150Skmacy LLE_WUNLOCK(lle); 1365186150Skmacy LLE_LOCK_DESTROY(lle); 1366186119Sqingli free(lle, M_LLTABLE); 1367186119Sqingli} 1368186119Sqingli 1369192476Sqingli 1370192476Sqingli#define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 1371192476Sqingli (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) 1372192476Sqingli 1373192476Sqinglistatic void 1374192476Sqingliin_lltable_prefix_free(struct lltable *llt, 1375192476Sqingli const struct sockaddr *prefix, 1376222143Sqingli const struct sockaddr *mask, 1377222143Sqingli u_int flags) 1378192476Sqingli{ 1379192476Sqingli const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; 1380192476Sqingli const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; 1381192476Sqingli struct llentry *lle, *next; 1382192476Sqingli register int i; 1383215207Sgnn size_t pkts_dropped; 1384192476Sqingli 1385192476Sqingli for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 1386192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 1387192476Sqingli 1388222143Sqingli /* 1389222143Sqingli * (flags & LLE_STATIC) means deleting all entries 1390222143Sqingli * including static ARP entries 1391222143Sqingli */ 1392192476Sqingli if (IN_ARE_MASKED_ADDR_EQUAL((struct sockaddr_in *)L3_ADDR(lle), 1393222143Sqingli pfx, msk) && 1394222143Sqingli ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))) { 1395206481Sbz int canceled; 1396206481Sbz 1397206481Sbz canceled = callout_drain(&lle->la_timer); 1398192476Sqingli LLE_WLOCK(lle); 1399206481Sbz if (canceled) 1400206481Sbz LLE_REMREF(lle); 1401215207Sgnn pkts_dropped = llentry_free(lle); 1402215207Sgnn ARPSTAT_ADD(dropped, pkts_dropped); 1403192476Sqingli } 1404192476Sqingli } 1405192476Sqingli } 1406192476Sqingli} 1407192476Sqingli 1408192476Sqingli 1409186119Sqinglistatic int 1410201282Sqingliin_lltable_rtcheck(struct ifnet *ifp, u_int flags, const struct sockaddr *l3addr) 1411186119Sqingli{ 1412186119Sqingli struct rtentry *rt; 1413186119Sqingli 1414186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1415186119Sqingli ("sin_family %d", l3addr->sa_family)); 1416186119Sqingli 1417186119Sqingli /* XXX rtalloc1 should take a const param */ 1418186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1419223862Szec 1420223862Szec /* 1421223862Szec * If the gateway for an existing host route matches the target L3 1422223862Szec * address, allow for ARP to proceed. 1423223862Szec */ 1424223862Szec if (rt != NULL && (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) && 1425223862Szec rt->rt_gateway->sa_family == AF_INET && 1426223862Szec memcmp(rt->rt_gateway->sa_data, l3addr->sa_data, 4) == 0) { 1427223862Szec RTFREE_LOCKED(rt); 1428223862Szec return (0); 1429223862Szec } 1430223862Szec 1431208553Sqingli if (rt == NULL || (!(flags & LLE_PUB) && 1432208553Sqingli ((rt->rt_flags & RTF_GATEWAY) || 1433208553Sqingli (rt->rt_ifp != ifp)))) { 1434198418Sqingli#ifdef DIAGNOSTIC 1435186119Sqingli log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1436186119Sqingli inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1437197696Sqingli#endif 1438186119Sqingli if (rt != NULL) 1439186119Sqingli RTFREE_LOCKED(rt); 1440186119Sqingli return (EINVAL); 1441186119Sqingli } 1442186119Sqingli RTFREE_LOCKED(rt); 1443186119Sqingli return 0; 1444186119Sqingli} 1445186119Sqingli 1446186119Sqingli/* 1447186119Sqingli * Return NULL if not found or marked for deletion. 1448186119Sqingli * If found return lle read locked. 1449186119Sqingli */ 1450186119Sqinglistatic struct llentry * 1451186119Sqingliin_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1452186119Sqingli{ 1453186119Sqingli const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1454186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1455186119Sqingli struct llentry *lle; 1456186119Sqingli struct llentries *lleh; 1457186119Sqingli u_int hashkey; 1458186119Sqingli 1459186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 1460186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1461186119Sqingli ("sin_family %d", l3addr->sa_family)); 1462186119Sqingli 1463186119Sqingli hashkey = sin->sin_addr.s_addr; 1464186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1465186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 1466186708Sqingli struct sockaddr_in *sa2 = (struct sockaddr_in *)L3_ADDR(lle); 1467186119Sqingli if (lle->la_flags & LLE_DELETED) 1468186119Sqingli continue; 1469186708Sqingli if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1470186119Sqingli break; 1471186119Sqingli } 1472186119Sqingli if (lle == NULL) { 1473198418Sqingli#ifdef DIAGNOSTIC 1474186119Sqingli if (flags & LLE_DELETE) 1475186119Sqingli log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1476186119Sqingli#endif 1477186119Sqingli if (!(flags & LLE_CREATE)) 1478186119Sqingli return (NULL); 1479186119Sqingli /* 1480186119Sqingli * A route that covers the given address must have 1481186119Sqingli * been installed 1st because we are doing a resolution, 1482186119Sqingli * verify this. 1483186119Sqingli */ 1484186119Sqingli if (!(flags & LLE_IFADDR) && 1485201282Sqingli in_lltable_rtcheck(ifp, flags, l3addr) != 0) 1486186119Sqingli goto done; 1487186119Sqingli 1488186119Sqingli lle = in_lltable_new(l3addr, flags); 1489186119Sqingli if (lle == NULL) { 1490186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1491186119Sqingli goto done; 1492186119Sqingli } 1493186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 1494186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1495186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1496186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 1497186119Sqingli } 1498186119Sqingli 1499186119Sqingli lle->lle_tbl = llt; 1500186119Sqingli lle->lle_head = lleh; 1501186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 1502186119Sqingli } else if (flags & LLE_DELETE) { 1503186119Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1504186119Sqingli LLE_WLOCK(lle); 1505186119Sqingli lle->la_flags = LLE_DELETED; 1506196995Snp EVENTHANDLER_INVOKE(arp_update_event, lle); 1507186119Sqingli LLE_WUNLOCK(lle); 1508198418Sqingli#ifdef DIAGNOSTIC 1509186119Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1510186119Sqingli#endif 1511186119Sqingli } 1512186119Sqingli lle = (void *)-1; 1513186119Sqingli 1514186119Sqingli } 1515186544Sbz if (LLE_IS_VALID(lle)) { 1516186119Sqingli if (flags & LLE_EXCLUSIVE) 1517186119Sqingli LLE_WLOCK(lle); 1518186119Sqingli else 1519186119Sqingli LLE_RLOCK(lle); 1520186119Sqingli } 1521186119Sqinglidone: 1522186119Sqingli return (lle); 1523186119Sqingli} 1524186119Sqingli 1525186119Sqinglistatic int 1526186119Sqingliin_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1527186119Sqingli{ 1528186119Sqingli#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1529186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1530186119Sqingli struct llentry *lle; 1531186119Sqingli /* XXX stack use */ 1532186119Sqingli struct { 1533186119Sqingli struct rt_msghdr rtm; 1534186119Sqingli struct sockaddr_inarp sin; 1535186119Sqingli struct sockaddr_dl sdl; 1536186119Sqingli } arpc; 1537186119Sqingli int error, i; 1538186119Sqingli 1539196535Srwatson LLTABLE_LOCK_ASSERT(); 1540186119Sqingli 1541186119Sqingli error = 0; 1542186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1543186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1544186119Sqingli struct sockaddr_dl *sdl; 1545186119Sqingli 1546186119Sqingli /* skip deleted entries */ 1547198111Sqingli if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 1548186119Sqingli continue; 1549186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 1550188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1551186980Sbz continue; 1552186119Sqingli /* 1553186119Sqingli * produce a msg made of: 1554186119Sqingli * struct rt_msghdr; 1555186119Sqingli * struct sockaddr_inarp; (IPv4) 1556186119Sqingli * struct sockaddr_dl; 1557186119Sqingli */ 1558186119Sqingli bzero(&arpc, sizeof(arpc)); 1559186119Sqingli arpc.rtm.rtm_msglen = sizeof(arpc); 1560186935Sharti arpc.rtm.rtm_version = RTM_VERSION; 1561186935Sharti arpc.rtm.rtm_type = RTM_GET; 1562186935Sharti arpc.rtm.rtm_flags = RTF_UP; 1563186935Sharti arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1564186119Sqingli arpc.sin.sin_family = AF_INET; 1565186119Sqingli arpc.sin.sin_len = sizeof(arpc.sin); 1566186119Sqingli arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1567186119Sqingli 1568186119Sqingli /* publish */ 1569186119Sqingli if (lle->la_flags & LLE_PUB) { 1570186119Sqingli arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1571186119Sqingli /* proxy only */ 1572186119Sqingli if (lle->la_flags & LLE_PROXY) 1573186119Sqingli arpc.sin.sin_other = SIN_PROXY; 1574186119Sqingli } 1575186119Sqingli 1576186119Sqingli sdl = &arpc.sdl; 1577186119Sqingli sdl->sdl_family = AF_LINK; 1578186119Sqingli sdl->sdl_len = sizeof(*sdl); 1579186119Sqingli sdl->sdl_index = ifp->if_index; 1580186119Sqingli sdl->sdl_type = ifp->if_type; 1581198111Sqingli if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 1582198111Sqingli sdl->sdl_alen = ifp->if_addrlen; 1583198111Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1584198111Sqingli } else { 1585198111Sqingli sdl->sdl_alen = 0; 1586198111Sqingli bzero(LLADDR(sdl), ifp->if_addrlen); 1587198111Sqingli } 1588186119Sqingli 1589186119Sqingli arpc.rtm.rtm_rmx.rmx_expire = 1590186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1591186500Sqingli arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1592186119Sqingli if (lle->la_flags & LLE_STATIC) 1593186119Sqingli arpc.rtm.rtm_flags |= RTF_STATIC; 1594186119Sqingli arpc.rtm.rtm_index = ifp->if_index; 1595186119Sqingli error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1596186119Sqingli if (error) 1597186119Sqingli break; 1598186119Sqingli } 1599186119Sqingli } 1600186119Sqingli return error; 1601186119Sqingli#undef SIN 1602186119Sqingli} 1603186119Sqingli 1604186119Sqinglivoid * 1605186119Sqingliin_domifattach(struct ifnet *ifp) 1606189592Sbms{ 1607189592Sbms struct in_ifinfo *ii; 1608189592Sbms struct lltable *llt; 1609189592Sbms 1610189592Sbms ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1611189592Sbms 1612189592Sbms llt = lltable_init(ifp, AF_INET); 1613186119Sqingli if (llt != NULL) { 1614186119Sqingli llt->llt_free = in_lltable_free; 1615192476Sqingli llt->llt_prefix_free = in_lltable_prefix_free; 1616186119Sqingli llt->llt_lookup = in_lltable_lookup; 1617186119Sqingli llt->llt_dump = in_lltable_dump; 1618186119Sqingli } 1619189592Sbms ii->ii_llt = llt; 1620189592Sbms 1621189592Sbms ii->ii_igmp = igmp_domifattach(ifp); 1622189592Sbms 1623189592Sbms return ii; 1624186119Sqingli} 1625186119Sqingli 1626186119Sqinglivoid 1627189592Sbmsin_domifdetach(struct ifnet *ifp, void *aux) 1628186119Sqingli{ 1629189592Sbms struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1630186119Sqingli 1631189592Sbms igmp_domifdetach(ifp); 1632189592Sbms lltable_free(ii->ii_llt); 1633189592Sbms free(ii, M_IFADDR); 1634186119Sqingli} 1635