in.c revision 249742
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 249742 2013-04-21 21:28:38Z oleg $"); 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 59228571Sglebius#include <netinet/if_ether.h> 601541Srgrimes#include <netinet/in.h> 611541Srgrimes#include <netinet/in_var.h> 6281127Sume#include <netinet/in_pcb.h> 63170613Sbms#include <netinet/ip_var.h> 64228571Sglebius#include <netinet/ip_carp.h> 65189592Sbms#include <netinet/igmp_var.h> 66195699Srwatson#include <netinet/udp.h> 67195699Srwatson#include <netinet/udp_var.h> 681541Srgrimes 6992723Salfredstatic int in_mask2len(struct in_addr *); 7092723Salfredstatic void in_len2mask(struct in_addr *, int); 7192723Salfredstatic int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 7292723Salfred struct ifnet *, struct thread *); 7355009Sshin 7492723Salfredstatic void in_socktrim(struct sockaddr_in *); 75228571Sglebiusstatic int in_ifinit(struct ifnet *, struct in_ifaddr *, 76230207Sglebius struct sockaddr_in *, int, int); 77167729Sbmsstatic void in_purgemaddrs(struct ifnet *); 781541Srgrimes 79228571Sglebiusstatic VNET_DEFINE(int, nosameprefix); 80228571Sglebius#define V_nosameprefix VNET(nosameprefix) 81228571SglebiusSYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, no_same_prefix, CTLFLAG_RW, 82228571Sglebius &VNET_NAME(nosameprefix), 0, 83149221Sglebius "Refuse to create same prefixes on different interfaces"); 8421666Swollman 85207369SbzVNET_DECLARE(struct inpcbinfo, ripcbinfo); 86207369Sbz#define V_ripcbinfo VNET(ripcbinfo) 87207369Sbz 88215207SgnnVNET_DECLARE(struct arpstat, arpstat); /* ARP statistics, see if_arp.h */ 89215207Sgnn#define V_arpstat VNET(arpstat) 90215207Sgnn 911541Srgrimes/* 921541Srgrimes * Return 1 if an internet address is for a ``local'' host 93226401Sglebius * (one to which we have a connection). 941541Srgrimes */ 951549Srgrimesint 96169454Srwatsonin_localaddr(struct in_addr in) 971541Srgrimes{ 981541Srgrimes register u_long i = ntohl(in.s_addr); 991541Srgrimes register struct in_ifaddr *ia; 1001541Srgrimes 101194951Srwatson IN_IFADDR_RLOCK(); 102226401Sglebius TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 103226401Sglebius if ((i & ia->ia_subnetmask) == ia->ia_subnet) { 104226401Sglebius IN_IFADDR_RUNLOCK(); 105226401Sglebius return (1); 106194951Srwatson } 1071541Srgrimes } 108194951Srwatson IN_IFADDR_RUNLOCK(); 1091541Srgrimes return (0); 1101541Srgrimes} 1111541Srgrimes 1121541Srgrimes/* 113133486Sandre * Return 1 if an internet address is for the local host and configured 114133486Sandre * on one of its interfaces. 115133486Sandre */ 116133486Sandreint 117169454Srwatsonin_localip(struct in_addr in) 118133486Sandre{ 119133486Sandre struct in_ifaddr *ia; 120133486Sandre 121194951Srwatson IN_IFADDR_RLOCK(); 122133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 123194951Srwatson if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { 124194951Srwatson IN_IFADDR_RUNLOCK(); 125184295Sbz return (1); 126194951Srwatson } 127133486Sandre } 128194951Srwatson IN_IFADDR_RUNLOCK(); 129184295Sbz return (0); 130133486Sandre} 131133486Sandre 132133486Sandre/* 1331541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1341541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1351541Srgrimes * may be forwarded. 1361541Srgrimes */ 1371549Srgrimesint 138169454Srwatsonin_canforward(struct in_addr in) 1391541Srgrimes{ 1401541Srgrimes register u_long i = ntohl(in.s_addr); 1411541Srgrimes register u_long net; 1421541Srgrimes 143166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1441541Srgrimes return (0); 1451541Srgrimes if (IN_CLASSA(i)) { 1461541Srgrimes net = i & IN_CLASSA_NET; 1471541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1481541Srgrimes return (0); 1491541Srgrimes } 1501541Srgrimes return (1); 1511541Srgrimes} 1521541Srgrimes 1531541Srgrimes/* 1541541Srgrimes * Trim a mask in a sockaddr 1551541Srgrimes */ 15612296Sphkstatic void 157169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1581541Srgrimes{ 1591541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1601541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1611541Srgrimes 1621541Srgrimes ap->sin_len = 0; 1634127Swollman while (--cp >= cplim) 164133874Srwatson if (*cp) { 1651541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1661541Srgrimes break; 1671541Srgrimes } 1681541Srgrimes} 1691541Srgrimes 17055009Sshinstatic int 17155009Sshinin_mask2len(mask) 17255009Sshin struct in_addr *mask; 17355009Sshin{ 17455009Sshin int x, y; 17555009Sshin u_char *p; 17655009Sshin 17755009Sshin p = (u_char *)mask; 17855009Sshin for (x = 0; x < sizeof(*mask); x++) { 17955009Sshin if (p[x] != 0xff) 18055009Sshin break; 18155009Sshin } 18255009Sshin y = 0; 18355009Sshin if (x < sizeof(*mask)) { 18455009Sshin for (y = 0; y < 8; y++) { 18555009Sshin if ((p[x] & (0x80 >> y)) == 0) 18655009Sshin break; 18755009Sshin } 18855009Sshin } 189184295Sbz return (x * 8 + y); 19055009Sshin} 19155009Sshin 19255009Sshinstatic void 193169454Srwatsonin_len2mask(struct in_addr *mask, int len) 19455009Sshin{ 19555009Sshin int i; 19655009Sshin u_char *p; 19755009Sshin 19855009Sshin p = (u_char *)mask; 19955009Sshin bzero(mask, sizeof(*mask)); 20055009Sshin for (i = 0; i < len / 8; i++) 20155009Sshin p[i] = 0xff; 20255009Sshin if (len % 8) 20355009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 20455009Sshin} 20555009Sshin 2061541Srgrimes/* 2071541Srgrimes * Generic internet control operations (ioctl's). 208191443Srwatson * 209191443Srwatson * ifp is NULL if not an interface-specific ioctl. 2101541Srgrimes */ 2111541Srgrimes/* ARGSUSED */ 2121549Srgrimesint 213169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 214169454Srwatson struct thread *td) 2151541Srgrimes{ 2161541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 217184295Sbz register struct in_ifaddr *ia, *iap; 2181541Srgrimes register struct ifaddr *ifa; 219168032Sbms struct in_addr allhosts_addr; 22084102Sjlemon struct in_addr dst; 221189592Sbms struct in_ifinfo *ii; 2221541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 223194951Srwatson int error, hostIsNew, iaIsNew, maskIsNew; 224168032Sbms int iaIsFirst; 225228768Sglebius u_long ocmd = cmd; 2261541Srgrimes 227228768Sglebius /* 228228768Sglebius * Pre-10.x compat: OSIOCAIFADDR passes a shorter 229228768Sglebius * struct in_aliasreq, without ifra_vhid. 230228768Sglebius */ 231228768Sglebius if (cmd == OSIOCAIFADDR) 232228768Sglebius cmd = SIOCAIFADDR; 233228768Sglebius 234184295Sbz ia = NULL; 235168032Sbms iaIsFirst = 0; 23687124Sbrian iaIsNew = 0; 237168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 23887124Sbrian 239191443Srwatson /* 240191443Srwatson * Filter out ioctls we implement directly; forward the rest on to 241191443Srwatson * in_lifaddr_ioctl() and ifp->if_ioctl(). 242191443Srwatson */ 24355009Sshin switch (cmd) { 244191443Srwatson case SIOCGIFADDR: 245191443Srwatson case SIOCGIFBRDADDR: 246191443Srwatson case SIOCGIFDSTADDR: 247191443Srwatson case SIOCGIFNETMASK: 248227791Sglebius case SIOCDIFADDR: 249227791Sglebius break; 250227791Sglebius case SIOCAIFADDR: 251227791Sglebius /* 252227791Sglebius * ifra_addr must be present and be of INET family. 253227791Sglebius * ifra_broadaddr and ifra_mask are optional. 254227791Sglebius */ 255227791Sglebius if (ifra->ifra_addr.sin_len != sizeof(struct sockaddr_in) || 256227791Sglebius ifra->ifra_addr.sin_family != AF_INET) 257227791Sglebius return (EINVAL); 258227791Sglebius if (ifra->ifra_broadaddr.sin_len != 0 && 259227831Sglebius (ifra->ifra_broadaddr.sin_len != 260227831Sglebius sizeof(struct sockaddr_in) || 261227791Sglebius ifra->ifra_broadaddr.sin_family != AF_INET)) 262227791Sglebius return (EINVAL); 263228768Sglebius#if 0 264228768Sglebius /* 265228768Sglebius * ifconfig(8) in pre-10.x doesn't set sin_family for the 266228768Sglebius * mask. The code is disabled for the 10.x timeline, to 267228768Sglebius * make SIOCAIFADDR compatible with 9.x ifconfig(8). 268228768Sglebius * The code should be enabled in 11.x 269228768Sglebius */ 270227791Sglebius if (ifra->ifra_mask.sin_len != 0 && 271227791Sglebius (ifra->ifra_mask.sin_len != sizeof(struct sockaddr_in) || 272227791Sglebius ifra->ifra_mask.sin_family != AF_INET)) 273227791Sglebius return (EINVAL); 274228768Sglebius#endif 275227791Sglebius break; 276191443Srwatson case SIOCSIFADDR: 277191443Srwatson case SIOCSIFBRDADDR: 278191443Srwatson case SIOCSIFDSTADDR: 279191443Srwatson case SIOCSIFNETMASK: 280230207Sglebius /* We no longer support that old commands. */ 281230207Sglebius return (EINVAL); 282191443Srwatson 28355009Sshin case SIOCALIFADDR: 284164033Srwatson if (td != NULL) { 285164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 286164033Srwatson if (error) 287164033Srwatson return (error); 288164033Srwatson } 289184295Sbz if (ifp == NULL) 290184295Sbz return (EINVAL); 291164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 292164033Srwatson 29355009Sshin case SIOCDLIFADDR: 294164033Srwatson if (td != NULL) { 295164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 296164033Srwatson if (error) 297164033Srwatson return (error); 298164033Srwatson } 299184295Sbz if (ifp == NULL) 300184295Sbz return (EINVAL); 301164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 302164033Srwatson 30355009Sshin case SIOCGLIFADDR: 304184295Sbz if (ifp == NULL) 305184295Sbz return (EINVAL); 30683366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 307191443Srwatson 308191443Srwatson default: 309191443Srwatson if (ifp == NULL || ifp->if_ioctl == NULL) 310191443Srwatson return (EOPNOTSUPP); 311191443Srwatson return ((*ifp->if_ioctl)(ifp, cmd, data)); 31255009Sshin } 31355009Sshin 314191443Srwatson if (ifp == NULL) 315191443Srwatson return (EADDRNOTAVAIL); 316191443Srwatson 3171541Srgrimes /* 318191456Srwatson * Security checks before we get involved in any work. 319191456Srwatson */ 320191456Srwatson switch (cmd) { 321191456Srwatson case SIOCAIFADDR: 322191456Srwatson if (td != NULL) { 323191456Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 324191456Srwatson if (error) 325191456Srwatson return (error); 326191456Srwatson } 327191456Srwatson break; 328191456Srwatson 329191456Srwatson case SIOCDIFADDR: 330191456Srwatson if (td != NULL) { 331191456Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 332191456Srwatson if (error) 333191456Srwatson return (error); 334191456Srwatson } 335191456Srwatson break; 336191456Srwatson } 337191456Srwatson 338191456Srwatson /* 3391541Srgrimes * Find address for this interface, if it exists. 34014632Sfenner * 341191443Srwatson * If an alias address was specified, find that one instead of the 342191443Srwatson * first one on the interface, if possible. 3431541Srgrimes */ 344191443Srwatson dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 345194951Srwatson IN_IFADDR_RLOCK(); 346191443Srwatson LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { 347191443Srwatson if (iap->ia_ifp == ifp && 348191443Srwatson iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 349191443Srwatson if (td == NULL || prison_check_ip4(td->td_ucred, 350191443Srwatson &dst) == 0) 351191443Srwatson ia = iap; 352191443Srwatson break; 353191443Srwatson } 354191443Srwatson } 355194760Srwatson if (ia != NULL) 356194760Srwatson ifa_ref(&ia->ia_ifa); 357194951Srwatson IN_IFADDR_RUNLOCK(); 358191443Srwatson if (ia == NULL) { 359229621Sjhb IF_ADDR_RLOCK(ifp); 360191443Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 361191443Srwatson iap = ifatoia(ifa); 362191443Srwatson if (iap->ia_addr.sin_family == AF_INET) { 363191443Srwatson if (td != NULL && 364191443Srwatson prison_check_ip4(td->td_ucred, 365191443Srwatson &iap->ia_addr.sin_addr) != 0) 366191443Srwatson continue; 367191443Srwatson ia = iap; 36884102Sjlemon break; 36984102Sjlemon } 370191443Srwatson } 371194760Srwatson if (ia != NULL) 372194760Srwatson ifa_ref(&ia->ia_ifa); 373229621Sjhb IF_ADDR_RUNLOCK(ifp); 37484102Sjlemon } 375191443Srwatson if (ia == NULL) 376191443Srwatson iaIsFirst = 1; 3771541Srgrimes 378191500Srwatson error = 0; 3791541Srgrimes switch (cmd) { 3801541Srgrimes case SIOCAIFADDR: 3811541Srgrimes case SIOCDIFADDR: 382227958Sglebius if (ifra->ifra_addr.sin_family == AF_INET) { 383194760Srwatson struct in_ifaddr *oia; 384194760Srwatson 385194951Srwatson IN_IFADDR_RLOCK(); 38671999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 3878071Swollman if (ia->ia_ifp == ifp && 3888071Swollman ia->ia_addr.sin_addr.s_addr == 3898071Swollman ifra->ifra_addr.sin_addr.s_addr) 3908071Swollman break; 3918071Swollman } 392194760Srwatson if (ia != NULL && ia != oia) 393194760Srwatson ifa_ref(&ia->ia_ifa); 394194760Srwatson if (oia != NULL && ia != oia) 395194760Srwatson ifa_free(&oia->ia_ifa); 396194951Srwatson IN_IFADDR_RUNLOCK(); 3978876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 3988071Swollman && (cmd == SIOCAIFADDR) 3998071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 4008071Swollman == INADDR_ANY)) { 401191500Srwatson error = EDESTADDRREQ; 402194760Srwatson goto out; 4038071Swollman } 4041541Srgrimes } 405191500Srwatson if (cmd == SIOCDIFADDR && ia == NULL) { 406191500Srwatson error = EADDRNOTAVAIL; 407194760Srwatson goto out; 408191500Srwatson } 409184295Sbz if (ia == NULL) { 41020407Swollman ia = (struct in_ifaddr *) 411191500Srwatson malloc(sizeof *ia, M_IFADDR, M_NOWAIT | 412191500Srwatson M_ZERO); 413191500Srwatson if (ia == NULL) { 414191500Srwatson error = ENOBUFS; 415194760Srwatson goto out; 416191500Srwatson } 417191500Srwatson 41820407Swollman ifa = &ia->ia_ifa; 419194602Srwatson ifa_init(ifa); 42020407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 42120407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 42220407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 423108033Shsu 4241541Srgrimes ia->ia_sockmask.sin_len = 8; 42585740Sdes ia->ia_sockmask.sin_family = AF_INET; 4261541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 4271541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 4281541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 4291541Srgrimes } 4301541Srgrimes ia->ia_ifp = ifp; 431151824Sglebius 432194760Srwatson ifa_ref(ifa); /* if_addrhead */ 433229621Sjhb IF_ADDR_WLOCK(ifp); 434191285Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 435229621Sjhb IF_ADDR_WUNLOCK(ifp); 436194760Srwatson ifa_ref(ifa); /* in_ifaddrhead */ 437194951Srwatson IN_IFADDR_WLOCK(); 438181803Sbz TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 439194951Srwatson IN_IFADDR_WUNLOCK(); 44087124Sbrian iaIsNew = 1; 4411541Srgrimes } 4421541Srgrimes break; 4431541Srgrimes 4441541Srgrimes case SIOCGIFADDR: 4451541Srgrimes case SIOCGIFNETMASK: 4461541Srgrimes case SIOCGIFDSTADDR: 4471541Srgrimes case SIOCGIFBRDADDR: 448191500Srwatson if (ia == NULL) { 449191500Srwatson error = EADDRNOTAVAIL; 450194760Srwatson goto out; 451191500Srwatson } 4521541Srgrimes break; 4531541Srgrimes } 454191500Srwatson 455191500Srwatson /* 456194760Srwatson * Most paths in this switch return directly or via out. Only paths 457194760Srwatson * that remove the address break in order to hit common removal code. 458191500Srwatson */ 4591541Srgrimes switch (cmd) { 4601541Srgrimes case SIOCGIFADDR: 4611541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 462194760Srwatson goto out; 4631541Srgrimes 4641541Srgrimes case SIOCGIFBRDADDR: 465191500Srwatson if ((ifp->if_flags & IFF_BROADCAST) == 0) { 466191500Srwatson error = EINVAL; 467194760Srwatson goto out; 468191500Srwatson } 4691541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 470194760Srwatson goto out; 4711541Srgrimes 4721541Srgrimes case SIOCGIFDSTADDR: 473191500Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 474191500Srwatson error = EINVAL; 475194760Srwatson goto out; 476191500Srwatson } 4771541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 478194760Srwatson goto out; 4791541Srgrimes 4801541Srgrimes case SIOCGIFNETMASK: 4811541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 482194760Srwatson goto out; 4831541Srgrimes 4841541Srgrimes case SIOCAIFADDR: 4851541Srgrimes maskIsNew = 0; 4861541Srgrimes hostIsNew = 1; 4871541Srgrimes error = 0; 488227959Sglebius if (ifra->ifra_addr.sin_addr.s_addr == 489227791Sglebius ia->ia_addr.sin_addr.s_addr) 490227791Sglebius hostIsNew = 0; 4911541Srgrimes if (ifra->ifra_mask.sin_len) { 492238945Sglebius /* 493197210Sqingli * QL: XXX 494197210Sqingli * Need to scrub the prefix here in case 495197210Sqingli * the issued command is SIOCAIFADDR with 496197210Sqingli * the same address, but with a different 497197210Sqingli * prefix length. And if the prefix length 498238945Sglebius * is the same as before, then the call is 499197210Sqingli * un-necessarily executed here. 500197210Sqingli */ 501222438Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 5021541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 50385740Sdes ia->ia_sockmask.sin_family = AF_INET; 5041541Srgrimes ia->ia_subnetmask = 505238945Sglebius ntohl(ia->ia_sockmask.sin_addr.s_addr); 5061541Srgrimes maskIsNew = 1; 5071541Srgrimes } 5081541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 5091541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 510222438Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 5111541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 5121541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 5131541Srgrimes } 514227801Sglebius if (hostIsNew || maskIsNew) 515230207Sglebius error = in_ifinit(ifp, ia, &ifra->ifra_addr, maskIsNew, 516230207Sglebius (ocmd == cmd ? ifra->ifra_vhid : 0)); 51787124Sbrian if (error != 0 && iaIsNew) 518201811Sqingli break; 51987124Sbrian 5201541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 521227791Sglebius ifra->ifra_broadaddr.sin_len) 5221541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 523168032Sbms if (error == 0) { 524189603Sbms ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 525189592Sbms if (iaIsFirst && 526189592Sbms (ifp->if_flags & IFF_MULTICAST) != 0) { 527189592Sbms error = in_joingroup(ifp, &allhosts_addr, 528189592Sbms NULL, &ii->ii_allhosts); 529189592Sbms } 530126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 531168032Sbms } 532194760Srwatson goto out; 5331541Srgrimes 5341541Srgrimes case SIOCDIFADDR: 53574299Sru /* 53674299Sru * in_ifscrub kills the interface route. 53774299Sru */ 538222143Sqingli in_ifscrub(ifp, ia, LLE_STATIC); 539191500Srwatson 54015092Sdg /* 54174299Sru * in_ifadown gets rid of all the rest of 54274299Sru * the routes. This is not quite the right 54374299Sru * thing to do, but at least if we are running 54474299Sru * a routing process they will come back. 54574299Sru */ 54676469Sru in_ifadown(&ia->ia_ifa, 1); 547126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 54887124Sbrian error = 0; 5491541Srgrimes break; 5501541Srgrimes 5511541Srgrimes default: 552191443Srwatson panic("in_control: unsupported ioctl"); 5531541Srgrimes } 55487124Sbrian 555228571Sglebius if (ia->ia_ifa.ifa_carp) 556228571Sglebius (*carp_detach_p)(&ia->ia_ifa); 557228571Sglebius 558229621Sjhb IF_ADDR_WLOCK(ifp); 559213932Sbz /* Re-check that ia is still part of the list. */ 560213932Sbz TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 561213932Sbz if (ifa == &ia->ia_ifa) 562213932Sbz break; 563213932Sbz } 564213932Sbz if (ifa == NULL) { 565213932Sbz /* 566213932Sbz * If we lost the race with another thread, there is no need to 567213932Sbz * try it again for the next loop as there is no other exit 568213932Sbz * path between here and out. 569213932Sbz */ 570229621Sjhb IF_ADDR_WUNLOCK(ifp); 571213932Sbz error = EADDRNOTAVAIL; 572213932Sbz goto out; 573213932Sbz } 574191285Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 575229621Sjhb IF_ADDR_WUNLOCK(ifp); 576239395Srrs ifa_free(&ia->ia_ifa); /* if_addrhead */ 577194951Srwatson 578194951Srwatson IN_IFADDR_WLOCK(); 579181803Sbz TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 580194760Srwatson 581227791Sglebius LIST_REMOVE(ia, ia_hash); 582227791Sglebius IN_IFADDR_WUNLOCK(); 583227791Sglebius /* 584227791Sglebius * If this is the last IPv4 address configured on this 585227791Sglebius * interface, leave the all-hosts group. 586227791Sglebius * No state-change report need be transmitted. 587227791Sglebius */ 588227791Sglebius IFP_TO_IA(ifp, iap); 589227791Sglebius if (iap == NULL) { 590227791Sglebius ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 591227791Sglebius IN_MULTI_LOCK(); 592227791Sglebius if (ii->ii_allhosts) { 593227791Sglebius (void)in_leavegroup_locked(ii->ii_allhosts, NULL); 594227791Sglebius ii->ii_allhosts = NULL; 595227791Sglebius } 596227791Sglebius IN_MULTI_UNLOCK(); 597194951Srwatson } else 598227791Sglebius ifa_free(&iap->ia_ifa); 599227791Sglebius 600194951Srwatson ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 601194760Srwatsonout: 602194760Srwatson if (ia != NULL) 603194760Srwatson ifa_free(&ia->ia_ifa); 60487124Sbrian return (error); 6051541Srgrimes} 6061541Srgrimes 6071541Srgrimes/* 60855009Sshin * SIOC[GAD]LIFADDR. 60955009Sshin * SIOCGLIFADDR: get first address. (?!?) 61055009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 61155009Sshin * get first address that matches the specified prefix. 61255009Sshin * SIOCALIFADDR: add the specified address. 61355009Sshin * SIOCALIFADDR with IFLR_PREFIX: 61455009Sshin * EINVAL since we can't deduce hostid part of the address. 61555009Sshin * SIOCDLIFADDR: delete the specified address. 61655009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 61755009Sshin * delete the first address that matches the specified prefix. 61855009Sshin * return values: 61955009Sshin * EINVAL on invalid parameters 62055009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 62155009Sshin * other values may be returned from in_ioctl() 62255009Sshin */ 62355009Sshinstatic int 624169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 625169454Srwatson struct ifnet *ifp, struct thread *td) 62655009Sshin{ 62755009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 62855009Sshin struct ifaddr *ifa; 62955009Sshin 63055009Sshin /* sanity checks */ 631184295Sbz if (data == NULL || ifp == NULL) { 63255009Sshin panic("invalid argument to in_lifaddr_ioctl"); 63355009Sshin /*NOTRECHED*/ 63455009Sshin } 63555009Sshin 63655009Sshin switch (cmd) { 63755009Sshin case SIOCGLIFADDR: 63855009Sshin /* address must be specified on GET with IFLR_PREFIX */ 63955009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 64055009Sshin break; 64155009Sshin /*FALLTHROUGH*/ 64255009Sshin case SIOCALIFADDR: 64355009Sshin case SIOCDLIFADDR: 64455009Sshin /* address must be specified on ADD and DELETE */ 64555917Sshin if (iflr->addr.ss_family != AF_INET) 646184295Sbz return (EINVAL); 64755917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 648184295Sbz return (EINVAL); 64955009Sshin /* XXX need improvement */ 65055917Sshin if (iflr->dstaddr.ss_family 65155917Sshin && iflr->dstaddr.ss_family != AF_INET) 652184295Sbz return (EINVAL); 65355917Sshin if (iflr->dstaddr.ss_family 65455917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 655184295Sbz return (EINVAL); 65655009Sshin break; 65755009Sshin default: /*shouldn't happen*/ 658184295Sbz return (EOPNOTSUPP); 65955009Sshin } 66055009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 661184295Sbz return (EINVAL); 66255009Sshin 66355009Sshin switch (cmd) { 66455009Sshin case SIOCALIFADDR: 66555009Sshin { 66655009Sshin struct in_aliasreq ifra; 66755009Sshin 66855009Sshin if (iflr->flags & IFLR_PREFIX) 669184295Sbz return (EINVAL); 67055009Sshin 671229476Sjhb /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR). */ 67255009Sshin bzero(&ifra, sizeof(ifra)); 67355009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 67455009Sshin sizeof(ifra.ifra_name)); 67555009Sshin 67655917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 67755009Sshin 67855917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 67955009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 68055917Sshin iflr->dstaddr.ss_len); 68155009Sshin } 68255009Sshin 68355009Sshin ifra.ifra_mask.sin_family = AF_INET; 68455009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 68555009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 68655009Sshin 687184295Sbz return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 68855009Sshin } 68955009Sshin case SIOCGLIFADDR: 69055009Sshin case SIOCDLIFADDR: 69155009Sshin { 69255009Sshin struct in_ifaddr *ia; 69355009Sshin struct in_addr mask, candidate, match; 69455009Sshin struct sockaddr_in *sin; 69555009Sshin 69655009Sshin bzero(&mask, sizeof(mask)); 697170855Smjacob bzero(&match, sizeof(match)); 69855009Sshin if (iflr->flags & IFLR_PREFIX) { 69955009Sshin /* lookup a prefix rather than address. */ 70055009Sshin in_len2mask(&mask, iflr->prefixlen); 70155009Sshin 70255009Sshin sin = (struct sockaddr_in *)&iflr->addr; 70355009Sshin match.s_addr = sin->sin_addr.s_addr; 70455009Sshin match.s_addr &= mask.s_addr; 70555009Sshin 70655009Sshin /* if you set extra bits, that's wrong */ 70755009Sshin if (match.s_addr != sin->sin_addr.s_addr) 708184295Sbz return (EINVAL); 70955009Sshin 71055009Sshin } else { 711170855Smjacob /* on getting an address, take the 1st match */ 712170855Smjacob /* on deleting an address, do exact match */ 713170855Smjacob if (cmd != SIOCGLIFADDR) { 71455009Sshin in_len2mask(&mask, 32); 71555009Sshin sin = (struct sockaddr_in *)&iflr->addr; 71655009Sshin match.s_addr = sin->sin_addr.s_addr; 71755009Sshin } 71855009Sshin } 71955009Sshin 720229621Sjhb IF_ADDR_RLOCK(ifp); 72155009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 722229476Sjhb if (ifa->ifa_addr->sa_family != AF_INET) 72355009Sshin continue; 724170855Smjacob if (match.s_addr == 0) 72555009Sshin break; 726229478Sjhb sin = (struct sockaddr_in *)&ifa->ifa_addr; 727229478Sjhb candidate.s_addr = sin->sin_addr.s_addr; 72855009Sshin candidate.s_addr &= mask.s_addr; 72955009Sshin if (candidate.s_addr == match.s_addr) 73055009Sshin break; 73155009Sshin } 732229477Sjhb if (ifa != NULL) 733229477Sjhb ifa_ref(ifa); 734229621Sjhb IF_ADDR_RUNLOCK(ifp); 735184295Sbz if (ifa == NULL) 736184295Sbz return (EADDRNOTAVAIL); 73755009Sshin ia = (struct in_ifaddr *)ifa; 73855009Sshin 73955009Sshin if (cmd == SIOCGLIFADDR) { 74055009Sshin /* fill in the if_laddrreq structure */ 74155009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 74255009Sshin 74355009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 74455009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 74555009Sshin ia->ia_dstaddr.sin_len); 74655009Sshin } else 74755009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 74855009Sshin 74955009Sshin iflr->prefixlen = 75055009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 75155009Sshin 75255009Sshin iflr->flags = 0; /*XXX*/ 753229477Sjhb ifa_free(ifa); 75455009Sshin 755184295Sbz return (0); 75655009Sshin } else { 75755009Sshin struct in_aliasreq ifra; 75855009Sshin 759229476Sjhb /* fill in_aliasreq and do ioctl(SIOCDIFADDR) */ 76055009Sshin bzero(&ifra, sizeof(ifra)); 76155009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 76255009Sshin sizeof(ifra.ifra_name)); 76355009Sshin 76455009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 76555009Sshin ia->ia_addr.sin_len); 76655009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 76755009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 76855009Sshin ia->ia_dstaddr.sin_len); 76955009Sshin } 77055009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 77155009Sshin ia->ia_sockmask.sin_len); 772229477Sjhb ifa_free(ifa); 77355009Sshin 774184295Sbz return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 775184295Sbz ifp, td)); 77655009Sshin } 77755009Sshin } 77855009Sshin } 77955009Sshin 780184295Sbz return (EOPNOTSUPP); /*just for safety*/ 78155009Sshin} 78255009Sshin 78355009Sshin/* 7841541Srgrimes * Delete any existing route for an interface. 7851541Srgrimes */ 78622672Swollmanvoid 787222143Sqingliin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia, u_int flags) 7881541Srgrimes{ 789169454Srwatson 790222143Sqingli in_scrubprefix(ia, flags); 7911541Srgrimes} 7921541Srgrimes 7931541Srgrimes/* 7941541Srgrimes * Initialize an interface's internet address 7951541Srgrimes * and routing table entry. 7961541Srgrimes */ 79712296Sphkstatic int 798169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 799230207Sglebius int masksupplied, int vhid) 8001541Srgrimes{ 8011541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 802244665Sglebius int flags, error = 0; 8031541Srgrimes 804227791Sglebius IN_IFADDR_WLOCK(); 805227791Sglebius if (ia->ia_addr.sin_family == AF_INET) 806105748Ssuz LIST_REMOVE(ia, ia_hash); 8071541Srgrimes ia->ia_addr = *sin; 808227791Sglebius LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 809227791Sglebius ia, ia_hash); 810227791Sglebius IN_IFADDR_WUNLOCK(); 811227791Sglebius 812228571Sglebius if (vhid > 0) { 813228571Sglebius if (carp_attach_p != NULL) 814228571Sglebius error = (*carp_attach_p)(&ia->ia_ifa, vhid); 815228571Sglebius else 816228571Sglebius error = EPROTONOSUPPORT; 817228571Sglebius } 818228571Sglebius if (error) 819228571Sglebius return (error); 820228571Sglebius 8211541Srgrimes /* 822244989Speter * Give the interface a chance to initialize 823244989Speter * if this is its first address, 824244989Speter * and to validate the address if necessary. 8251541Srgrimes */ 826227791Sglebius if (ifp->if_ioctl != NULL && 827227791Sglebius (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia)) != 0) 828146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 829146883Siedowse return (error); 830227791Sglebius 8311541Srgrimes /* 832226401Sglebius * Be compatible with network classes, if netmask isn't supplied, 833226401Sglebius * guess it based on classes. 8341541Srgrimes */ 835228313Sglebius if (!masksupplied) { 836226401Sglebius if (IN_CLASSA(i)) 837226401Sglebius ia->ia_subnetmask = IN_CLASSA_NET; 838226401Sglebius else if (IN_CLASSB(i)) 839226401Sglebius ia->ia_subnetmask = IN_CLASSB_NET; 840226401Sglebius else 841226401Sglebius ia->ia_subnetmask = IN_CLASSC_NET; 8421541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 843226401Sglebius } 8441541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 8451541Srgrimes in_socktrim(&ia->ia_sockmask); 846244665Sglebius 8471541Srgrimes /* 8481541Srgrimes * Add route for the network. 8491541Srgrimes */ 850244665Sglebius flags = RTF_UP; 8511541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 8521541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 853226402Sglebius if (ia->ia_subnetmask == IN_RFC3021_MASK) 854226402Sglebius ia->ia_broadaddr.sin_addr.s_addr = INADDR_BROADCAST; 855226402Sglebius else 856226402Sglebius ia->ia_broadaddr.sin_addr.s_addr = 857226402Sglebius htonl(ia->ia_subnet | ~ia->ia_subnetmask); 8581541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 859137833Smlaier ia->ia_dstaddr = ia->ia_addr; 8601541Srgrimes flags |= RTF_HOST; 8611541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 8621541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 8631541Srgrimes return (0); 8641541Srgrimes flags |= RTF_HOST; 8651541Srgrimes } 866228571Sglebius if (!vhid && (error = in_addprefix(ia, flags)) != 0) 867137628Smlaier return (error); 86894326Sbrian 869192085Sqingli if (ia->ia_addr.sin_addr.s_addr == INADDR_ANY) 870192085Sqingli return (0); 871192085Sqingli 872227791Sglebius if (ifp->if_flags & IFF_POINTOPOINT && 873227791Sglebius ia->ia_dstaddr.sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 874203401Sqingli return (0); 875203401Sqingli 876192011Sqingli /* 877192011Sqingli * add a loopback route to self 878192011Sqingli */ 879228571Sglebius if (V_useloopback && !vhid && !(ifp->if_flags & IFF_LOOPBACK)) { 880201282Sqingli struct route ia_ro; 881201282Sqingli 882201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 883201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = ia->ia_addr; 884231852Sbz rtalloc_ign_fib(&ia_ro, 0, RT_DEFAULT_FIB); 885201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 886201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 887201282Sqingli RT_LOCK(ia_ro.ro_rt); 888201282Sqingli RT_ADDREF(ia_ro.ro_rt); 889201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 890201282Sqingli } else 891238945Sglebius error = ifa_add_loopback_route((struct ifaddr *)ia, 892238945Sglebius (struct sockaddr *)&ia->ia_addr); 893201282Sqingli if (error == 0) 894201282Sqingli ia->ia_flags |= IFA_RTSELF; 895201282Sqingli if (ia_ro.ro_rt != NULL) 896201282Sqingli RTFREE(ia_ro.ro_rt); 897201282Sqingli } 898192011Sqingli 8991541Srgrimes return (error); 9001541Srgrimes} 9011541Srgrimes 902137628Smlaier#define rtinitflags(x) \ 903137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 904137628Smlaier ? RTF_HOST : 0) 905201285Sqingli 906137628Smlaier/* 907238945Sglebius * Generate a routing message when inserting or deleting 908201285Sqingli * an interface address alias. 909201285Sqingli */ 910238945Sglebiusstatic void in_addralias_rtmsg(int cmd, struct in_addr *prefix, 911201285Sqingli struct in_ifaddr *target) 912201285Sqingli{ 913201285Sqingli struct route pfx_ro; 914201285Sqingli struct sockaddr_in *pfx_addr; 915201285Sqingli struct rtentry msg_rt; 916201285Sqingli 917201285Sqingli /* QL: XXX 918201285Sqingli * This is a bit questionable because there is no 919201285Sqingli * additional route entry added/deleted for an address 920201285Sqingli * alias. Therefore this route report is inaccurate. 921201285Sqingli */ 922201285Sqingli bzero(&pfx_ro, sizeof(pfx_ro)); 923201285Sqingli pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); 924201285Sqingli pfx_addr->sin_len = sizeof(*pfx_addr); 925201285Sqingli pfx_addr->sin_family = AF_INET; 926201285Sqingli pfx_addr->sin_addr = *prefix; 927201285Sqingli rtalloc_ign_fib(&pfx_ro, 0, 0); 928201285Sqingli if (pfx_ro.ro_rt != NULL) { 929201285Sqingli msg_rt = *pfx_ro.ro_rt; 930201285Sqingli 931201285Sqingli /* QL: XXX 932201285Sqingli * Point the gateway to the new interface 933238945Sglebius * address as if a new prefix route entry has 934238945Sglebius * been added through the new address alias. 935238945Sglebius * All other parts of the rtentry is accurate, 936201285Sqingli * e.g., rt_key, rt_mask, rt_ifp etc. 937201285Sqingli */ 938238945Sglebius msg_rt.rt_gateway = (struct sockaddr *)&target->ia_addr; 939238945Sglebius rt_newaddrmsg(cmd, (struct ifaddr *)target, 0, &msg_rt); 940201285Sqingli RTFREE(pfx_ro.ro_rt); 941201285Sqingli } 942201285Sqingli return; 943201285Sqingli} 944201285Sqingli 945201285Sqingli/* 946170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 947137628Smlaier */ 948228571Sglebiusint 949169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 950137628Smlaier{ 951137628Smlaier struct in_ifaddr *ia; 952151555Sglebius struct in_addr prefix, mask, p, m; 953137628Smlaier int error; 9541541Srgrimes 955170855Smjacob if ((flags & RTF_HOST) != 0) { 956137628Smlaier prefix = target->ia_dstaddr.sin_addr; 957170855Smjacob mask.s_addr = 0; 958170855Smjacob } else { 959137628Smlaier prefix = target->ia_addr.sin_addr; 960137628Smlaier mask = target->ia_sockmask.sin_addr; 961137628Smlaier prefix.s_addr &= mask.s_addr; 962137628Smlaier } 963137628Smlaier 964194951Srwatson IN_IFADDR_RLOCK(); 965181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 966151555Sglebius if (rtinitflags(ia)) { 967224747Skevlo p = ia->ia_dstaddr.sin_addr; 968151555Sglebius 969151555Sglebius if (prefix.s_addr != p.s_addr) 970151555Sglebius continue; 971151555Sglebius } else { 972151555Sglebius p = ia->ia_addr.sin_addr; 973151555Sglebius m = ia->ia_sockmask.sin_addr; 974151555Sglebius p.s_addr &= m.s_addr; 975151555Sglebius 976151555Sglebius if (prefix.s_addr != p.s_addr || 977151555Sglebius mask.s_addr != m.s_addr) 978151555Sglebius continue; 979137628Smlaier } 980137628Smlaier 981137628Smlaier /* 982137628Smlaier * If we got a matching prefix route inserted by other 983137628Smlaier * interface address, we are done here. 984137628Smlaier */ 985149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 986204902Sqingli#ifdef RADIX_MPATH 987238945Sglebius if (ia->ia_addr.sin_addr.s_addr == 988212209Sbz target->ia_addr.sin_addr.s_addr) { 989212209Sbz IN_IFADDR_RUNLOCK(); 990204902Sqingli return (EEXIST); 991212209Sbz } else 992204902Sqingli break; 993204902Sqingli#endif 994228571Sglebius if (V_nosameprefix) { 995194951Srwatson IN_IFADDR_RUNLOCK(); 996149221Sglebius return (EEXIST); 997194951Srwatson } else { 998201285Sqingli in_addralias_rtmsg(RTM_ADD, &prefix, target); 999194951Srwatson IN_IFADDR_RUNLOCK(); 1000149221Sglebius return (0); 1001194951Srwatson } 1002149221Sglebius } 1003137628Smlaier } 1004194951Srwatson IN_IFADDR_RUNLOCK(); 1005137628Smlaier 1006137628Smlaier /* 1007137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 1008137628Smlaier */ 1009137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 1010137628Smlaier if (!error) 1011137628Smlaier target->ia_flags |= IFA_ROUTE; 1012184295Sbz return (error); 1013137628Smlaier} 1014137628Smlaier 10151541Srgrimes/* 1016137628Smlaier * If there is no other address in the system that can serve a route to the 1017137628Smlaier * same prefix, remove the route. Hand over the route to the new address 1018137628Smlaier * otherwise. 1019137628Smlaier */ 1020228571Sglebiusint 1021222143Sqingliin_scrubprefix(struct in_ifaddr *target, u_int flags) 1022137628Smlaier{ 1023137628Smlaier struct in_ifaddr *ia; 1024228454Sglebius struct in_addr prefix, mask, p, m; 1025201282Sqingli int error = 0; 1026192476Sqingli struct sockaddr_in prefix0, mask0; 1027137628Smlaier 1028195914Sqingli /* 1029195914Sqingli * Remove the loopback route to the interface address. 1030195914Sqingli * The "useloopback" setting is not consulted because if the 1031195914Sqingli * user configures an interface address, turns off this 1032195914Sqingli * setting, and then tries to delete that interface address, 1033195914Sqingli * checking the current setting of "useloopback" would leave 1034195914Sqingli * that interface address loopback route untouched, which 1035195914Sqingli * would be wrong. Therefore the interface address loopback route 1036195914Sqingli * deletion is unconditional. 1037195914Sqingli */ 1038192085Sqingli if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && 1039201282Sqingli !(target->ia_ifp->if_flags & IFF_LOOPBACK) && 1040201282Sqingli (target->ia_flags & IFA_RTSELF)) { 1041201282Sqingli struct route ia_ro; 1042201282Sqingli int freeit = 0; 1043201282Sqingli 1044201282Sqingli bzero(&ia_ro, sizeof(ia_ro)); 1045201282Sqingli *((struct sockaddr_in *)(&ia_ro.ro_dst)) = target->ia_addr; 1046201282Sqingli rtalloc_ign_fib(&ia_ro, 0, 0); 1047201282Sqingli if ((ia_ro.ro_rt != NULL) && (ia_ro.ro_rt->rt_ifp != NULL) && 1048201282Sqingli (ia_ro.ro_rt->rt_ifp == V_loif)) { 1049201282Sqingli RT_LOCK(ia_ro.ro_rt); 1050201282Sqingli if (ia_ro.ro_rt->rt_refcnt <= 1) 1051201282Sqingli freeit = 1; 1052226114Sqingli else if (flags & LLE_STATIC) { 1053201282Sqingli RT_REMREF(ia_ro.ro_rt); 1054226114Sqingli target->ia_flags &= ~IFA_RTSELF; 1055226114Sqingli } 1056201282Sqingli RTFREE_LOCKED(ia_ro.ro_rt); 1057201282Sqingli } 1058222143Sqingli if (freeit && (flags & LLE_STATIC)) { 1059201282Sqingli error = ifa_del_loopback_route((struct ifaddr *)target, 1060238945Sglebius (struct sockaddr *)&target->ia_addr); 1061222143Sqingli if (error == 0) 1062222143Sqingli target->ia_flags &= ~IFA_RTSELF; 1063222143Sqingli } 1064226120Sqingli if ((flags & LLE_STATIC) && 1065226120Sqingli !(target->ia_ifp->if_flags & IFF_NOARP)) 1066222143Sqingli /* remove arp cache */ 1067222143Sqingli arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 1068192011Sqingli } 1069192011Sqingli 1070228454Sglebius if (rtinitflags(target)) { 1071137628Smlaier prefix = target->ia_dstaddr.sin_addr; 1072228454Sglebius mask.s_addr = 0; 1073228454Sglebius } else { 1074137628Smlaier prefix = target->ia_addr.sin_addr; 1075137628Smlaier mask = target->ia_sockmask.sin_addr; 1076137628Smlaier prefix.s_addr &= mask.s_addr; 1077137628Smlaier } 1078137628Smlaier 1079201285Sqingli if ((target->ia_flags & IFA_ROUTE) == 0) { 1080201285Sqingli in_addralias_rtmsg(RTM_DELETE, &prefix, target); 1081201285Sqingli return (0); 1082201285Sqingli } 1083201285Sqingli 1084194951Srwatson IN_IFADDR_RLOCK(); 1085181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1086228454Sglebius if (rtinitflags(ia)) { 1087137628Smlaier p = ia->ia_dstaddr.sin_addr; 1088228454Sglebius 1089228454Sglebius if (prefix.s_addr != p.s_addr) 1090228454Sglebius continue; 1091228454Sglebius } else { 1092137628Smlaier p = ia->ia_addr.sin_addr; 1093228454Sglebius m = ia->ia_sockmask.sin_addr; 1094228454Sglebius p.s_addr &= m.s_addr; 1095228454Sglebius 1096228454Sglebius if (prefix.s_addr != p.s_addr || 1097228454Sglebius mask.s_addr != m.s_addr) 1098228454Sglebius continue; 1099137628Smlaier } 1100137628Smlaier 1101228454Sglebius if ((ia->ia_ifp->if_flags & IFF_UP) == 0) 1102137628Smlaier continue; 1103137628Smlaier 1104137628Smlaier /* 1105137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 1106137628Smlaier * the route itself to it. Make sure that routing daemons 1107137628Smlaier * get a heads-up. 1108137628Smlaier */ 1109228571Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0) { 1110219828Spluknet ifa_ref(&ia->ia_ifa); 1111194951Srwatson IN_IFADDR_RUNLOCK(); 1112222438Sqingli error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, 1113137628Smlaier rtinitflags(target)); 1114222438Sqingli if (error == 0) 1115222438Sqingli target->ia_flags &= ~IFA_ROUTE; 1116222438Sqingli else 1117222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, old prefix delete failed\n", 1118222438Sqingli error); 1119137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 1120137628Smlaier rtinitflags(ia) | RTF_UP); 1121137628Smlaier if (error == 0) 1122137628Smlaier ia->ia_flags |= IFA_ROUTE; 1123222438Sqingli else 1124222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, new prefix add failed\n", 1125222438Sqingli error); 1126219828Spluknet ifa_free(&ia->ia_ifa); 1127184295Sbz return (error); 1128137628Smlaier } 1129137628Smlaier } 1130194951Srwatson IN_IFADDR_RUNLOCK(); 1131137628Smlaier 1132137628Smlaier /* 1133192476Sqingli * remove all L2 entries on the given prefix 1134192476Sqingli */ 1135192476Sqingli bzero(&prefix0, sizeof(prefix0)); 1136192476Sqingli prefix0.sin_len = sizeof(prefix0); 1137192476Sqingli prefix0.sin_family = AF_INET; 1138192476Sqingli prefix0.sin_addr.s_addr = target->ia_subnet; 1139192476Sqingli bzero(&mask0, sizeof(mask0)); 1140192476Sqingli mask0.sin_len = sizeof(mask0); 1141192476Sqingli mask0.sin_family = AF_INET; 1142192476Sqingli mask0.sin_addr.s_addr = target->ia_subnetmask; 1143238945Sglebius lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, 1144238945Sglebius (struct sockaddr *)&mask0, flags); 1145192476Sqingli 1146192476Sqingli /* 1147137628Smlaier * As no-one seem to have this prefix, we can remove the route. 1148137628Smlaier */ 1149222438Sqingli error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 1150222438Sqingli if (error == 0) 1151222438Sqingli target->ia_flags &= ~IFA_ROUTE; 1152222438Sqingli else 1153222438Sqingli log(LOG_INFO, "in_scrubprefix: err=%d, prefix delete failed\n", error); 1154222438Sqingli return (error); 1155137628Smlaier} 1156137628Smlaier 1157137628Smlaier#undef rtinitflags 1158137628Smlaier 1159137628Smlaier/* 11601541Srgrimes * Return 1 if the address might be a local broadcast address. 11611541Srgrimes */ 11621549Srgrimesint 1163169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 11641541Srgrimes{ 11651541Srgrimes register struct ifaddr *ifa; 11661541Srgrimes u_long t; 11671541Srgrimes 11681541Srgrimes if (in.s_addr == INADDR_BROADCAST || 11691541Srgrimes in.s_addr == INADDR_ANY) 1170184295Sbz return (1); 11711541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 1172184295Sbz return (0); 11731541Srgrimes t = ntohl(in.s_addr); 11741541Srgrimes /* 11751541Srgrimes * Look through the list of addresses for a match 11761541Srgrimes * with a broadcast address. 11771541Srgrimes */ 11781541Srgrimes#define ia ((struct in_ifaddr *)ifa) 117974362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 11801541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 11811541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 11821541Srgrimes /* 1183226402Sglebius * Check for old-style (host 0) broadcast, but 1184226402Sglebius * taking into account that RFC 3021 obsoletes it. 11851541Srgrimes */ 1186238945Sglebius (ia->ia_subnetmask != IN_RFC3021_MASK && 1187238945Sglebius t == ia->ia_subnet)) && 118813351Sguido /* 118913351Sguido * Check for an all one subnetmask. These 119013351Sguido * only exist when an interface gets a secondary 119113351Sguido * address. 119213351Sguido */ 1193238945Sglebius ia->ia_subnetmask != (u_long)0xffffffff) 1194184295Sbz return (1); 11951541Srgrimes return (0); 11961541Srgrimes#undef ia 11971541Srgrimes} 1198167729Sbms 11991541Srgrimes/* 1200189592Sbms * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1201189592Sbms */ 1202189592Sbmsvoid 1203189592Sbmsin_ifdetach(struct ifnet *ifp) 1204189592Sbms{ 1205189592Sbms 1206189592Sbms in_pcbpurgeif0(&V_ripcbinfo, ifp); 1207189592Sbms in_pcbpurgeif0(&V_udbinfo, ifp); 1208189592Sbms in_purgemaddrs(ifp); 1209189592Sbms} 1210189592Sbms 1211189592Sbms/* 1212167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 1213167729Sbms * multicast address records, associated with ifp. 1214189592Sbms * XXX It looks like domifdetach runs AFTER the link layer cleanup. 1215189931Sbms * XXX This should not race with ifma_protospec being set during 1216189931Sbms * a new allocation, if it does, we have bigger problems. 1217162718Sbms */ 1218167729Sbmsstatic void 1219167729Sbmsin_purgemaddrs(struct ifnet *ifp) 1220162718Sbms{ 1221189592Sbms LIST_HEAD(,in_multi) purgeinms; 1222189592Sbms struct in_multi *inm, *tinm; 1223189592Sbms struct ifmultiaddr *ifma; 1224162718Sbms 1225189592Sbms LIST_INIT(&purgeinms); 1226162718Sbms IN_MULTI_LOCK(); 1227189592Sbms 1228189592Sbms /* 1229189592Sbms * Extract list of in_multi associated with the detaching ifp 1230189592Sbms * which the PF_INET layer is about to release. 1231189592Sbms * We need to do this as IF_ADDR_LOCK() may be re-acquired 1232189592Sbms * by code further down. 1233189592Sbms */ 1234229621Sjhb IF_ADDR_RLOCK(ifp); 1235189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1236189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 1237189931Sbms ifma->ifma_protospec == NULL) 1238189592Sbms continue; 1239189931Sbms#if 0 1240189931Sbms KASSERT(ifma->ifma_protospec != NULL, 1241189931Sbms ("%s: ifma_protospec is NULL", __func__)); 1242189931Sbms#endif 1243189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 1244189592Sbms LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 1245162718Sbms } 1246229621Sjhb IF_ADDR_RUNLOCK(ifp); 1247150296Srwatson 1248189592Sbms LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 1249191476Srwatson LIST_REMOVE(inm, inm_link); 1250189592Sbms inm_release_locked(inm); 1251189592Sbms } 1252189592Sbms igmp_ifdetach(ifp); 1253150296Srwatson 1254189592Sbms IN_MULTI_UNLOCK(); 1255150296Srwatson} 1256186119Sqingli 1257186119Sqinglistruct in_llentry { 1258186119Sqingli struct llentry base; 1259186119Sqingli struct sockaddr_in l3_addr4; 1260186119Sqingli}; 1261186119Sqingli 1262232054Skmacy/* 1263232054Skmacy * Deletes an address from the address table. 1264232054Skmacy * This function is called by the timer functions 1265232054Skmacy * such as arptimer() and nd6_llinfo_timer(), and 1266232054Skmacy * the caller does the locking. 1267232054Skmacy */ 1268232054Skmacystatic void 1269232054Skmacyin_lltable_free(struct lltable *llt, struct llentry *lle) 1270232054Skmacy{ 1271232054Skmacy LLE_WUNLOCK(lle); 1272232054Skmacy LLE_LOCK_DESTROY(lle); 1273232054Skmacy free(lle, M_LLTABLE); 1274232054Skmacy} 1275232054Skmacy 1276186119Sqinglistatic struct llentry * 1277186119Sqingliin_lltable_new(const struct sockaddr *l3addr, u_int flags) 1278186119Sqingli{ 1279186119Sqingli struct in_llentry *lle; 1280186119Sqingli 1281234087Sglebius lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 1282186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 1283186119Sqingli return NULL; 1284186119Sqingli 1285186119Sqingli /* 1286186119Sqingli * For IPv4 this will trigger "arpresolve" to generate 1287186119Sqingli * an ARP request. 1288186119Sqingli */ 1289216075Sglebius lle->base.la_expire = time_uptime; /* mark expired */ 1290186119Sqingli lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1291186119Sqingli lle->base.lle_refcnt = 1; 1292232054Skmacy lle->base.lle_free = in_lltable_free; 1293186119Sqingli LLE_LOCK_INIT(&lle->base); 1294238990Sglebius callout_init_rw(&lle->base.la_timer, &lle->base.lle_lock, 1295238990Sglebius CALLOUT_RETURNUNLOCKED); 1296238990Sglebius 1297238990Sglebius return (&lle->base); 1298186119Sqingli} 1299186119Sqingli 1300192476Sqingli#define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 1301192476Sqingli (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) 1302192476Sqingli 1303192476Sqinglistatic void 1304238945Sglebiusin_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 1305238945Sglebius const struct sockaddr *mask, u_int flags) 1306192476Sqingli{ 1307192476Sqingli const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; 1308192476Sqingli const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; 1309192476Sqingli struct llentry *lle, *next; 1310238945Sglebius int i; 1311215207Sgnn size_t pkts_dropped; 1312192476Sqingli 1313238990Sglebius IF_AFDATA_WLOCK(llt->llt_ifp); 1314238945Sglebius for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1315192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 1316238945Sglebius /* 1317222143Sqingli * (flags & LLE_STATIC) means deleting all entries 1318238945Sglebius * including static ARP entries. 1319222143Sqingli */ 1320238945Sglebius if (IN_ARE_MASKED_ADDR_EQUAL(satosin(L3_ADDR(lle)), 1321238945Sglebius pfx, msk) && ((flags & LLE_STATIC) || 1322238945Sglebius !(lle->la_flags & LLE_STATIC))) { 1323192476Sqingli LLE_WLOCK(lle); 1324238990Sglebius if (callout_stop(&lle->la_timer)) 1325206481Sbz LLE_REMREF(lle); 1326215207Sgnn pkts_dropped = llentry_free(lle); 1327215207Sgnn ARPSTAT_ADD(dropped, pkts_dropped); 1328192476Sqingli } 1329192476Sqingli } 1330192476Sqingli } 1331238990Sglebius IF_AFDATA_WUNLOCK(llt->llt_ifp); 1332192476Sqingli} 1333192476Sqingli 1334192476Sqingli 1335186119Sqinglistatic int 1336201282Sqingliin_lltable_rtcheck(struct ifnet *ifp, u_int flags, const struct sockaddr *l3addr) 1337186119Sqingli{ 1338186119Sqingli struct rtentry *rt; 1339186119Sqingli 1340186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1341186119Sqingli ("sin_family %d", l3addr->sa_family)); 1342186119Sqingli 1343186119Sqingli /* XXX rtalloc1 should take a const param */ 1344186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1345223862Szec 1346225946Sqingli if (rt == NULL) 1347225946Sqingli return (EINVAL); 1348225946Sqingli 1349223862Szec /* 1350223862Szec * If the gateway for an existing host route matches the target L3 1351225946Sqingli * address, which is a special route inserted by some implementation 1352225946Sqingli * such as MANET, and the interface is of the correct type, then 1353225946Sqingli * allow for ARP to proceed. 1354223862Szec */ 1355225947Sqingli if (rt->rt_flags & RTF_GATEWAY) { 1356226224Sqingli if (!(rt->rt_flags & RTF_HOST) || !rt->rt_ifp || 1357238945Sglebius rt->rt_ifp->if_type != IFT_ETHER || 1358238945Sglebius (rt->rt_ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) != 0 || 1359238945Sglebius memcmp(rt->rt_gateway->sa_data, l3addr->sa_data, 1360238945Sglebius sizeof(in_addr_t)) != 0) { 1361226224Sqingli RTFREE_LOCKED(rt); 1362226224Sqingli return (EINVAL); 1363226224Sqingli } 1364225947Sqingli } 1365225947Sqingli 1366225947Sqingli /* 1367238945Sglebius * Make sure that at least the destination address is covered 1368238945Sglebius * by the route. This is for handling the case where 2 or more 1369225947Sqingli * interfaces have the same prefix. An incoming packet arrives 1370225947Sqingli * on one interface and the corresponding outgoing packet leaves 1371225947Sqingli * another interface. 1372225947Sqingli */ 1373226713Sqingli if (!(rt->rt_flags & RTF_HOST) && rt->rt_ifp != ifp) { 1374226224Sqingli const char *sa, *mask, *addr, *lim; 1375225947Sqingli int len; 1376225947Sqingli 1377226713Sqingli mask = (const char *)rt_mask(rt); 1378226713Sqingli /* 1379226713Sqingli * Just being extra cautious to avoid some custom 1380226713Sqingli * code getting into trouble. 1381226713Sqingli */ 1382226713Sqingli if (mask == NULL) { 1383226713Sqingli RTFREE_LOCKED(rt); 1384226713Sqingli return (EINVAL); 1385226713Sqingli } 1386226713Sqingli 1387226224Sqingli sa = (const char *)rt_key(rt); 1388226224Sqingli addr = (const char *)l3addr; 1389226224Sqingli len = ((const struct sockaddr_in *)l3addr)->sin_len; 1390225947Sqingli lim = addr + len; 1391225947Sqingli 1392225947Sqingli for ( ; addr < lim; sa++, mask++, addr++) { 1393225947Sqingli if ((*sa ^ *addr) & *mask) { 1394198418Sqingli#ifdef DIAGNOSTIC 1395225947Sqingli log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1396225947Sqingli inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1397197696Sqingli#endif 1398226224Sqingli RTFREE_LOCKED(rt); 1399226224Sqingli return (EINVAL); 1400225947Sqingli } 1401225947Sqingli } 1402186119Sqingli } 1403225947Sqingli 1404186119Sqingli RTFREE_LOCKED(rt); 1405226224Sqingli return (0); 1406186119Sqingli} 1407186119Sqingli 1408186119Sqingli/* 1409186119Sqingli * Return NULL if not found or marked for deletion. 1410186119Sqingli * If found return lle read locked. 1411186119Sqingli */ 1412186119Sqinglistatic struct llentry * 1413186119Sqingliin_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1414186119Sqingli{ 1415186119Sqingli const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1416186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1417186119Sqingli struct llentry *lle; 1418186119Sqingli struct llentries *lleh; 1419186119Sqingli u_int hashkey; 1420186119Sqingli 1421186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 1422186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1423186119Sqingli ("sin_family %d", l3addr->sa_family)); 1424186119Sqingli 1425186119Sqingli hashkey = sin->sin_addr.s_addr; 1426186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1427186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 1428238945Sglebius struct sockaddr_in *sa2 = satosin(L3_ADDR(lle)); 1429186119Sqingli if (lle->la_flags & LLE_DELETED) 1430186119Sqingli continue; 1431186708Sqingli if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1432186119Sqingli break; 1433186119Sqingli } 1434186119Sqingli if (lle == NULL) { 1435198418Sqingli#ifdef DIAGNOSTIC 1436186119Sqingli if (flags & LLE_DELETE) 1437238967Sglebius log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1438186119Sqingli#endif 1439186119Sqingli if (!(flags & LLE_CREATE)) 1440186119Sqingli return (NULL); 1441186119Sqingli /* 1442186119Sqingli * A route that covers the given address must have 1443186119Sqingli * been installed 1st because we are doing a resolution, 1444186119Sqingli * verify this. 1445186119Sqingli */ 1446186119Sqingli if (!(flags & LLE_IFADDR) && 1447201282Sqingli in_lltable_rtcheck(ifp, flags, l3addr) != 0) 1448186119Sqingli goto done; 1449186119Sqingli 1450186119Sqingli lle = in_lltable_new(l3addr, flags); 1451186119Sqingli if (lle == NULL) { 1452186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1453186119Sqingli goto done; 1454186119Sqingli } 1455186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 1456186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1457186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1458186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 1459186119Sqingli } 1460186119Sqingli 1461186119Sqingli lle->lle_tbl = llt; 1462186119Sqingli lle->lle_head = lleh; 1463238990Sglebius lle->la_flags |= LLE_LINKED; 1464186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 1465186119Sqingli } else if (flags & LLE_DELETE) { 1466186119Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1467186119Sqingli LLE_WLOCK(lle); 1468238990Sglebius lle->la_flags |= LLE_DELETED; 1469237263Snp EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 1470198418Sqingli#ifdef DIAGNOSTIC 1471249742Soleg log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1472186119Sqingli#endif 1473249742Soleg if ((lle->la_flags & 1474249742Soleg (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 1475249742Soleg llentry_free(lle); 1476249742Soleg else 1477249742Soleg LLE_WUNLOCK(lle); 1478186119Sqingli } 1479186119Sqingli lle = (void *)-1; 1480238967Sglebius 1481186119Sqingli } 1482186544Sbz if (LLE_IS_VALID(lle)) { 1483186119Sqingli if (flags & LLE_EXCLUSIVE) 1484186119Sqingli LLE_WLOCK(lle); 1485186119Sqingli else 1486186119Sqingli LLE_RLOCK(lle); 1487186119Sqingli } 1488186119Sqinglidone: 1489186119Sqingli return (lle); 1490186119Sqingli} 1491186119Sqingli 1492186119Sqinglistatic int 1493186119Sqingliin_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1494186119Sqingli{ 1495186119Sqingli#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1496186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1497186119Sqingli struct llentry *lle; 1498186119Sqingli /* XXX stack use */ 1499186119Sqingli struct { 1500186119Sqingli struct rt_msghdr rtm; 1501246143Sglebius struct sockaddr_in sin; 1502186119Sqingli struct sockaddr_dl sdl; 1503186119Sqingli } arpc; 1504186119Sqingli int error, i; 1505186119Sqingli 1506196535Srwatson LLTABLE_LOCK_ASSERT(); 1507186119Sqingli 1508186119Sqingli error = 0; 1509186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1510186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1511186119Sqingli struct sockaddr_dl *sdl; 1512238967Sglebius 1513186119Sqingli /* skip deleted entries */ 1514198111Sqingli if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 1515186119Sqingli continue; 1516186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 1517188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1518186980Sbz continue; 1519186119Sqingli /* 1520186119Sqingli * produce a msg made of: 1521186119Sqingli * struct rt_msghdr; 1522246143Sglebius * struct sockaddr_in; (IPv4) 1523186119Sqingli * struct sockaddr_dl; 1524186119Sqingli */ 1525186119Sqingli bzero(&arpc, sizeof(arpc)); 1526186119Sqingli arpc.rtm.rtm_msglen = sizeof(arpc); 1527186935Sharti arpc.rtm.rtm_version = RTM_VERSION; 1528186935Sharti arpc.rtm.rtm_type = RTM_GET; 1529186935Sharti arpc.rtm.rtm_flags = RTF_UP; 1530186935Sharti arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1531186119Sqingli arpc.sin.sin_family = AF_INET; 1532186119Sqingli arpc.sin.sin_len = sizeof(arpc.sin); 1533186119Sqingli arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1534186119Sqingli 1535186119Sqingli /* publish */ 1536246143Sglebius if (lle->la_flags & LLE_PUB) 1537186119Sqingli arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1538186119Sqingli 1539186119Sqingli sdl = &arpc.sdl; 1540186119Sqingli sdl->sdl_family = AF_LINK; 1541186119Sqingli sdl->sdl_len = sizeof(*sdl); 1542186119Sqingli sdl->sdl_index = ifp->if_index; 1543186119Sqingli sdl->sdl_type = ifp->if_type; 1544198111Sqingli if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 1545198111Sqingli sdl->sdl_alen = ifp->if_addrlen; 1546198111Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1547198111Sqingli } else { 1548198111Sqingli sdl->sdl_alen = 0; 1549198111Sqingli bzero(LLADDR(sdl), ifp->if_addrlen); 1550198111Sqingli } 1551186119Sqingli 1552186119Sqingli arpc.rtm.rtm_rmx.rmx_expire = 1553186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1554186500Sqingli arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1555186119Sqingli if (lle->la_flags & LLE_STATIC) 1556186119Sqingli arpc.rtm.rtm_flags |= RTF_STATIC; 1557186119Sqingli arpc.rtm.rtm_index = ifp->if_index; 1558186119Sqingli error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1559186119Sqingli if (error) 1560186119Sqingli break; 1561186119Sqingli } 1562186119Sqingli } 1563186119Sqingli return error; 1564186119Sqingli#undef SIN 1565186119Sqingli} 1566186119Sqingli 1567186119Sqinglivoid * 1568186119Sqingliin_domifattach(struct ifnet *ifp) 1569189592Sbms{ 1570189592Sbms struct in_ifinfo *ii; 1571189592Sbms struct lltable *llt; 1572189592Sbms 1573189592Sbms ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1574189592Sbms 1575189592Sbms llt = lltable_init(ifp, AF_INET); 1576186119Sqingli if (llt != NULL) { 1577192476Sqingli llt->llt_prefix_free = in_lltable_prefix_free; 1578186119Sqingli llt->llt_lookup = in_lltable_lookup; 1579186119Sqingli llt->llt_dump = in_lltable_dump; 1580186119Sqingli } 1581189592Sbms ii->ii_llt = llt; 1582189592Sbms 1583189592Sbms ii->ii_igmp = igmp_domifattach(ifp); 1584189592Sbms 1585189592Sbms return ii; 1586186119Sqingli} 1587186119Sqingli 1588186119Sqinglivoid 1589189592Sbmsin_domifdetach(struct ifnet *ifp, void *aux) 1590186119Sqingli{ 1591189592Sbms struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1592186119Sqingli 1593189592Sbms igmp_domifdetach(ifp); 1594189592Sbms lltable_free(ii->ii_llt); 1595189592Sbms free(ii, M_IFADDR); 1596186119Sqingli} 1597