in.c revision 186119
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 186119 2008-12-15 06:10:57Z qingli $"); 35172467Ssilby 36143868Sglebius#include "opt_carp.h" 37143868Sglebius 381541Srgrimes#include <sys/param.h> 391549Srgrimes#include <sys/systm.h> 4024204Sbde#include <sys/sockio.h> 411541Srgrimes#include <sys/malloc.h> 42164033Srwatson#include <sys/priv.h> 431541Srgrimes#include <sys/socket.h> 4412704Sphk#include <sys/kernel.h> 4512704Sphk#include <sys/sysctl.h> 46181803Sbz#include <sys/vimage.h> 471541Srgrimes 481541Srgrimes#include <net/if.h> 49186119Sqingli#include <net/if_llatbl.h> 5055009Sshin#include <net/if_types.h> 511541Srgrimes#include <net/route.h> 521541Srgrimes 531541Srgrimes#include <netinet/in.h> 541541Srgrimes#include <netinet/in_var.h> 5581127Sume#include <netinet/in_pcb.h> 56170613Sbms#include <netinet/ip_var.h> 57185571Sbz#include <netinet/vinet.h> 581541Srgrimes 5992723Salfredstatic int in_mask2len(struct in_addr *); 6092723Salfredstatic void in_len2mask(struct in_addr *, int); 6192723Salfredstatic int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 6292723Salfred struct ifnet *, struct thread *); 6355009Sshin 64137628Smlaierstatic int in_addprefix(struct in_ifaddr *, int); 65137628Smlaierstatic int in_scrubprefix(struct in_ifaddr *); 6692723Salfredstatic void in_socktrim(struct sockaddr_in *); 6792723Salfredstatic int in_ifinit(struct ifnet *, 6892723Salfred struct in_ifaddr *, struct sockaddr_in *, int); 69167729Sbmsstatic void in_purgemaddrs(struct ifnet *); 701541Srgrimes 71185088Szec#ifdef VIMAGE_GLOBALS 72185088Szecstatic int subnetsarelocal; 73185088Szecstatic int sameprefixcarponly; 74185088Szecextern struct inpcbinfo ripcbinfo; 75185088Szec#endif 76185088Szec 77183550SzecSYSCTL_V_INT(V_NET, vnet_inet, _net_inet_ip, OID_AUTO, subnets_are_local, 78183550Szec CTLFLAG_RW, subnetsarelocal, 0, 79183550Szec "Treat all subnets as directly connected"); 80183550SzecSYSCTL_V_INT(V_NET, vnet_inet, _net_inet_ip, OID_AUTO, same_prefix_carp_only, 81183550Szec CTLFLAG_RW, sameprefixcarponly, 0, 82149221Sglebius "Refuse to create same prefixes on different interfaces"); 8321666Swollman 841541Srgrimes/* 851541Srgrimes * Return 1 if an internet address is for a ``local'' host 861541Srgrimes * (one to which we have a connection). If subnetsarelocal 871541Srgrimes * is true, this includes other subnets of the local net. 881541Srgrimes * Otherwise, it includes only the directly-connected (sub)nets. 891541Srgrimes */ 901549Srgrimesint 91169454Srwatsonin_localaddr(struct in_addr in) 921541Srgrimes{ 93183550Szec INIT_VNET_INET(curvnet); 941541Srgrimes register u_long i = ntohl(in.s_addr); 951541Srgrimes register struct in_ifaddr *ia; 961541Srgrimes 97181803Sbz if (V_subnetsarelocal) { 98181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 991541Srgrimes if ((i & ia->ia_netmask) == ia->ia_net) 1001541Srgrimes return (1); 1011541Srgrimes } else { 102181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 1031541Srgrimes if ((i & ia->ia_subnetmask) == ia->ia_subnet) 1041541Srgrimes return (1); 1051541Srgrimes } 1061541Srgrimes return (0); 1071541Srgrimes} 1081541Srgrimes 1091541Srgrimes/* 110133486Sandre * Return 1 if an internet address is for the local host and configured 111133486Sandre * on one of its interfaces. 112133486Sandre */ 113133486Sandreint 114169454Srwatsonin_localip(struct in_addr in) 115133486Sandre{ 116183550Szec INIT_VNET_INET(curvnet); 117133486Sandre struct in_ifaddr *ia; 118133486Sandre 119133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 120133486Sandre if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) 121184295Sbz return (1); 122133486Sandre } 123184295Sbz return (0); 124133486Sandre} 125133486Sandre 126133486Sandre/* 1271541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1281541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1291541Srgrimes * may be forwarded. 1301541Srgrimes */ 1311549Srgrimesint 132169454Srwatsonin_canforward(struct in_addr in) 1331541Srgrimes{ 1341541Srgrimes register u_long i = ntohl(in.s_addr); 1351541Srgrimes register u_long net; 1361541Srgrimes 137166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1381541Srgrimes return (0); 1391541Srgrimes if (IN_CLASSA(i)) { 1401541Srgrimes net = i & IN_CLASSA_NET; 1411541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1421541Srgrimes return (0); 1431541Srgrimes } 1441541Srgrimes return (1); 1451541Srgrimes} 1461541Srgrimes 1471541Srgrimes/* 1481541Srgrimes * Trim a mask in a sockaddr 1491541Srgrimes */ 15012296Sphkstatic void 151169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1521541Srgrimes{ 1531541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1541541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1551541Srgrimes 1561541Srgrimes ap->sin_len = 0; 1574127Swollman while (--cp >= cplim) 158133874Srwatson if (*cp) { 1591541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1601541Srgrimes break; 1611541Srgrimes } 1621541Srgrimes} 1631541Srgrimes 16455009Sshinstatic int 16555009Sshinin_mask2len(mask) 16655009Sshin struct in_addr *mask; 16755009Sshin{ 16855009Sshin int x, y; 16955009Sshin u_char *p; 17055009Sshin 17155009Sshin p = (u_char *)mask; 17255009Sshin for (x = 0; x < sizeof(*mask); x++) { 17355009Sshin if (p[x] != 0xff) 17455009Sshin break; 17555009Sshin } 17655009Sshin y = 0; 17755009Sshin if (x < sizeof(*mask)) { 17855009Sshin for (y = 0; y < 8; y++) { 17955009Sshin if ((p[x] & (0x80 >> y)) == 0) 18055009Sshin break; 18155009Sshin } 18255009Sshin } 183184295Sbz return (x * 8 + y); 18455009Sshin} 18555009Sshin 18655009Sshinstatic void 187169454Srwatsonin_len2mask(struct in_addr *mask, int len) 18855009Sshin{ 18955009Sshin int i; 19055009Sshin u_char *p; 19155009Sshin 19255009Sshin p = (u_char *)mask; 19355009Sshin bzero(mask, sizeof(*mask)); 19455009Sshin for (i = 0; i < len / 8; i++) 19555009Sshin p[i] = 0xff; 19655009Sshin if (len % 8) 19755009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 19855009Sshin} 19955009Sshin 2001541Srgrimes/* 2011541Srgrimes * Generic internet control operations (ioctl's). 2021541Srgrimes * Ifp is 0 if not an interface-specific ioctl. 2031541Srgrimes */ 2041541Srgrimes/* ARGSUSED */ 2051549Srgrimesint 206169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 207169454Srwatson struct thread *td) 2081541Srgrimes{ 209183550Szec INIT_VNET_INET(curvnet); /* both so and ifp can be NULL here! */ 2101541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 211184295Sbz register struct in_ifaddr *ia, *iap; 2121541Srgrimes register struct ifaddr *ifa; 213168032Sbms struct in_addr allhosts_addr; 21484102Sjlemon struct in_addr dst; 2151541Srgrimes struct in_ifaddr *oia; 2161541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 2171541Srgrimes struct sockaddr_in oldaddr; 21887124Sbrian int error, hostIsNew, iaIsNew, maskIsNew, s; 219168032Sbms int iaIsFirst; 2201541Srgrimes 221184295Sbz ia = NULL; 222168032Sbms iaIsFirst = 0; 22387124Sbrian iaIsNew = 0; 224168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 22587124Sbrian 22655009Sshin switch (cmd) { 22755009Sshin case SIOCALIFADDR: 228164033Srwatson if (td != NULL) { 229164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 230164033Srwatson if (error) 231164033Srwatson return (error); 232164033Srwatson } 233184295Sbz if (ifp == NULL) 234184295Sbz return (EINVAL); 235164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 236164033Srwatson 23755009Sshin case SIOCDLIFADDR: 238164033Srwatson if (td != NULL) { 239164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 240164033Srwatson if (error) 241164033Srwatson return (error); 242164033Srwatson } 243184295Sbz if (ifp == NULL) 244184295Sbz return (EINVAL); 245164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 246164033Srwatson 24755009Sshin case SIOCGLIFADDR: 248184295Sbz if (ifp == NULL) 249184295Sbz return (EINVAL); 25083366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 25155009Sshin } 25255009Sshin 2531541Srgrimes /* 2541541Srgrimes * Find address for this interface, if it exists. 25514632Sfenner * 25614632Sfenner * If an alias address was specified, find that one instead of 25784102Sjlemon * the first one on the interface, if possible. 2581541Srgrimes */ 259184295Sbz if (ifp != NULL) { 26084102Sjlemon dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 26184102Sjlemon LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) 26284102Sjlemon if (iap->ia_ifp == ifp && 26384102Sjlemon iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 26484102Sjlemon ia = iap; 26584102Sjlemon break; 26684102Sjlemon } 26784102Sjlemon if (ia == NULL) 26884102Sjlemon TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 26984102Sjlemon iap = ifatoia(ifa); 27084102Sjlemon if (iap->ia_addr.sin_family == AF_INET) { 27114632Sfenner ia = iap; 27214632Sfenner break; 27314632Sfenner } 27414632Sfenner } 275168032Sbms if (ia == NULL) 276168032Sbms iaIsFirst = 1; 27784102Sjlemon } 2781541Srgrimes 2791541Srgrimes switch (cmd) { 2801541Srgrimes 2811541Srgrimes case SIOCAIFADDR: 2821541Srgrimes case SIOCDIFADDR: 283184295Sbz if (ifp == NULL) 28441575Seivind return (EADDRNOTAVAIL); 2858071Swollman if (ifra->ifra_addr.sin_family == AF_INET) { 28671999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 2878071Swollman if (ia->ia_ifp == ifp && 2888071Swollman ia->ia_addr.sin_addr.s_addr == 2898071Swollman ifra->ifra_addr.sin_addr.s_addr) 2908071Swollman break; 2918071Swollman } 2928876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 2938071Swollman && (cmd == SIOCAIFADDR) 2948071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 2958071Swollman == INADDR_ANY)) { 296184295Sbz return (EDESTADDRREQ); 2978071Swollman } 2981541Srgrimes } 299184295Sbz if (cmd == SIOCDIFADDR && ia == NULL) 3001541Srgrimes return (EADDRNOTAVAIL); 3011541Srgrimes /* FALLTHROUGH */ 3021541Srgrimes case SIOCSIFADDR: 3031541Srgrimes case SIOCSIFNETMASK: 3041541Srgrimes case SIOCSIFDSTADDR: 305164033Srwatson if (td != NULL) { 306175626Sbz error = priv_check(td, (cmd == SIOCDIFADDR) ? 307175626Sbz PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 308164033Srwatson if (error) 309164033Srwatson return (error); 310164033Srwatson } 3111541Srgrimes 312184295Sbz if (ifp == NULL) 31341575Seivind return (EADDRNOTAVAIL); 314184295Sbz if (ia == NULL) { 31520407Swollman ia = (struct in_ifaddr *) 316111119Simp malloc(sizeof *ia, M_IFADDR, M_WAITOK | M_ZERO); 317184295Sbz if (ia == NULL) 3181541Srgrimes return (ENOBUFS); 31915092Sdg /* 32015092Sdg * Protect from ipintr() traversing address list 32115092Sdg * while we're modifying it. 32215092Sdg */ 32315092Sdg s = splnet(); 32420407Swollman ifa = &ia->ia_ifa; 325108033Shsu IFA_LOCK_INIT(ifa); 32620407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 32720407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 32820407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 329108033Shsu ifa->ifa_refcnt = 1; 330108033Shsu TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 331108033Shsu 3321541Srgrimes ia->ia_sockmask.sin_len = 8; 33385740Sdes ia->ia_sockmask.sin_family = AF_INET; 3341541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 3351541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 3361541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 3371541Srgrimes } 3381541Srgrimes ia->ia_ifp = ifp; 339151824Sglebius 340181803Sbz TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 34115092Sdg splx(s); 34287124Sbrian iaIsNew = 1; 3431541Srgrimes } 3441541Srgrimes break; 3451541Srgrimes 3461541Srgrimes case SIOCSIFBRDADDR: 347164033Srwatson if (td != NULL) { 348164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 349164033Srwatson if (error) 350164033Srwatson return (error); 351164033Srwatson } 3521541Srgrimes /* FALLTHROUGH */ 3531541Srgrimes 3541541Srgrimes case SIOCGIFADDR: 3551541Srgrimes case SIOCGIFNETMASK: 3561541Srgrimes case SIOCGIFDSTADDR: 3571541Srgrimes case SIOCGIFBRDADDR: 358184295Sbz if (ia == NULL) 3591541Srgrimes return (EADDRNOTAVAIL); 3601541Srgrimes break; 3611541Srgrimes } 3621541Srgrimes switch (cmd) { 3631541Srgrimes 3641541Srgrimes case SIOCGIFADDR: 3651541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 36687124Sbrian return (0); 3671541Srgrimes 3681541Srgrimes case SIOCGIFBRDADDR: 3691541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 3701541Srgrimes return (EINVAL); 3711541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 37287124Sbrian return (0); 3731541Srgrimes 3741541Srgrimes case SIOCGIFDSTADDR: 3751541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 3761541Srgrimes return (EINVAL); 3771541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 37887124Sbrian return (0); 3791541Srgrimes 3801541Srgrimes case SIOCGIFNETMASK: 3811541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 38287124Sbrian return (0); 3831541Srgrimes 3841541Srgrimes case SIOCSIFDSTADDR: 3851541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 3861541Srgrimes return (EINVAL); 3871541Srgrimes oldaddr = ia->ia_dstaddr; 3881541Srgrimes ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 389184295Sbz if (ifp->if_ioctl != NULL) { 390146883Siedowse IFF_LOCKGIANT(ifp); 391146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 392146883Siedowse (caddr_t)ia); 393146883Siedowse IFF_UNLOCKGIANT(ifp); 394146883Siedowse if (error) { 395146883Siedowse ia->ia_dstaddr = oldaddr; 396146883Siedowse return (error); 397146883Siedowse } 3981541Srgrimes } 3991541Srgrimes if (ia->ia_flags & IFA_ROUTE) { 4001541Srgrimes ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 4011541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 4021541Srgrimes ia->ia_ifa.ifa_dstaddr = 4031541Srgrimes (struct sockaddr *)&ia->ia_dstaddr; 4041541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 4051541Srgrimes } 40687124Sbrian return (0); 4071541Srgrimes 4081541Srgrimes case SIOCSIFBRDADDR: 4091541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 4101541Srgrimes return (EINVAL); 4111541Srgrimes ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 41287124Sbrian return (0); 4131541Srgrimes 4141541Srgrimes case SIOCSIFADDR: 41587124Sbrian error = in_ifinit(ifp, ia, 41687124Sbrian (struct sockaddr_in *) &ifr->ifr_addr, 1); 41787124Sbrian if (error != 0 && iaIsNew) 41887124Sbrian break; 419168032Sbms if (error == 0) { 420168032Sbms if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST) != 0) 421168032Sbms in_addmulti(&allhosts_addr, ifp); 422126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 423168032Sbms } 42487124Sbrian return (0); 4251541Srgrimes 4261541Srgrimes case SIOCSIFNETMASK: 42785740Sdes ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 42885740Sdes ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 42987124Sbrian return (0); 4301541Srgrimes 4311541Srgrimes case SIOCAIFADDR: 4321541Srgrimes maskIsNew = 0; 4331541Srgrimes hostIsNew = 1; 4341541Srgrimes error = 0; 4351541Srgrimes if (ia->ia_addr.sin_family == AF_INET) { 4361541Srgrimes if (ifra->ifra_addr.sin_len == 0) { 4371541Srgrimes ifra->ifra_addr = ia->ia_addr; 4381541Srgrimes hostIsNew = 0; 4391541Srgrimes } else if (ifra->ifra_addr.sin_addr.s_addr == 4401541Srgrimes ia->ia_addr.sin_addr.s_addr) 4411541Srgrimes hostIsNew = 0; 4421541Srgrimes } 4431541Srgrimes if (ifra->ifra_mask.sin_len) { 4441541Srgrimes in_ifscrub(ifp, ia); 4451541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 44685740Sdes ia->ia_sockmask.sin_family = AF_INET; 4471541Srgrimes ia->ia_subnetmask = 4481541Srgrimes ntohl(ia->ia_sockmask.sin_addr.s_addr); 4491541Srgrimes maskIsNew = 1; 4501541Srgrimes } 4511541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 4521541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 4531541Srgrimes in_ifscrub(ifp, ia); 4541541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 4551541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 4561541Srgrimes } 4571541Srgrimes if (ifra->ifra_addr.sin_family == AF_INET && 4581541Srgrimes (hostIsNew || maskIsNew)) 4591541Srgrimes error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 46087124Sbrian if (error != 0 && iaIsNew) 46187124Sbrian break; 46287124Sbrian 4631541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 4641541Srgrimes (ifra->ifra_broadaddr.sin_family == AF_INET)) 4651541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 466168032Sbms if (error == 0) { 467168032Sbms if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST) != 0) 468168032Sbms in_addmulti(&allhosts_addr, ifp); 469126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 470168032Sbms } 4711541Srgrimes return (error); 4721541Srgrimes 4731541Srgrimes case SIOCDIFADDR: 47474299Sru /* 47574299Sru * in_ifscrub kills the interface route. 47674299Sru */ 4771541Srgrimes in_ifscrub(ifp, ia); 47815092Sdg /* 47974299Sru * in_ifadown gets rid of all the rest of 48074299Sru * the routes. This is not quite the right 48174299Sru * thing to do, but at least if we are running 48274299Sru * a routing process they will come back. 48374299Sru */ 48476469Sru in_ifadown(&ia->ia_ifa, 1); 485126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 48687124Sbrian error = 0; 4871541Srgrimes break; 4881541Srgrimes 4891541Srgrimes default: 490184295Sbz if (ifp == NULL || ifp->if_ioctl == NULL) 4911541Srgrimes return (EOPNOTSUPP); 492146883Siedowse IFF_LOCKGIANT(ifp); 493146883Siedowse error = (*ifp->if_ioctl)(ifp, cmd, data); 494146883Siedowse IFF_UNLOCKGIANT(ifp); 495146883Siedowse return (error); 4961541Srgrimes } 49787124Sbrian 49887124Sbrian /* 49987124Sbrian * Protect from ipintr() traversing address list while we're modifying 50087124Sbrian * it. 50187124Sbrian */ 50287124Sbrian s = splnet(); 50387124Sbrian TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 504181803Sbz TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 505168032Sbms if (ia->ia_addr.sin_family == AF_INET) { 506154777Sandre LIST_REMOVE(ia, ia_hash); 507168032Sbms /* 508168032Sbms * If this is the last IPv4 address configured on this 509168032Sbms * interface, leave the all-hosts group. 510168032Sbms * XXX: This is quite ugly because of locking and structure. 511168032Sbms */ 512168032Sbms oia = NULL; 513168032Sbms IFP_TO_IA(ifp, oia); 514168032Sbms if (oia == NULL) { 515168032Sbms struct in_multi *inm; 516168032Sbms 517168032Sbms IFF_LOCKGIANT(ifp); 518168032Sbms IN_MULTI_LOCK(); 519168032Sbms IN_LOOKUP_MULTI(allhosts_addr, ifp, inm); 520168032Sbms if (inm != NULL) 521168032Sbms in_delmulti_locked(inm); 522168032Sbms IN_MULTI_UNLOCK(); 523168032Sbms IFF_UNLOCKGIANT(ifp); 524168032Sbms } 525168032Sbms } 52687124Sbrian IFAFREE(&ia->ia_ifa); 52787124Sbrian splx(s); 52887124Sbrian 52987124Sbrian return (error); 5301541Srgrimes} 5311541Srgrimes 5321541Srgrimes/* 53355009Sshin * SIOC[GAD]LIFADDR. 53455009Sshin * SIOCGLIFADDR: get first address. (?!?) 53555009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 53655009Sshin * get first address that matches the specified prefix. 53755009Sshin * SIOCALIFADDR: add the specified address. 53855009Sshin * SIOCALIFADDR with IFLR_PREFIX: 53955009Sshin * EINVAL since we can't deduce hostid part of the address. 54055009Sshin * SIOCDLIFADDR: delete the specified address. 54155009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 54255009Sshin * delete the first address that matches the specified prefix. 54355009Sshin * return values: 54455009Sshin * EINVAL on invalid parameters 54555009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 54655009Sshin * other values may be returned from in_ioctl() 54755009Sshin */ 54855009Sshinstatic int 549169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 550169454Srwatson struct ifnet *ifp, struct thread *td) 55155009Sshin{ 55255009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 55355009Sshin struct ifaddr *ifa; 55455009Sshin 55555009Sshin /* sanity checks */ 556184295Sbz if (data == NULL || ifp == NULL) { 55755009Sshin panic("invalid argument to in_lifaddr_ioctl"); 55855009Sshin /*NOTRECHED*/ 55955009Sshin } 56055009Sshin 56155009Sshin switch (cmd) { 56255009Sshin case SIOCGLIFADDR: 56355009Sshin /* address must be specified on GET with IFLR_PREFIX */ 56455009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 56555009Sshin break; 56655009Sshin /*FALLTHROUGH*/ 56755009Sshin case SIOCALIFADDR: 56855009Sshin case SIOCDLIFADDR: 56955009Sshin /* address must be specified on ADD and DELETE */ 57055917Sshin if (iflr->addr.ss_family != AF_INET) 571184295Sbz return (EINVAL); 57255917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 573184295Sbz return (EINVAL); 57455009Sshin /* XXX need improvement */ 57555917Sshin if (iflr->dstaddr.ss_family 57655917Sshin && iflr->dstaddr.ss_family != AF_INET) 577184295Sbz return (EINVAL); 57855917Sshin if (iflr->dstaddr.ss_family 57955917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 580184295Sbz return (EINVAL); 58155009Sshin break; 58255009Sshin default: /*shouldn't happen*/ 583184295Sbz return (EOPNOTSUPP); 58455009Sshin } 58555009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 586184295Sbz return (EINVAL); 58755009Sshin 58855009Sshin switch (cmd) { 58955009Sshin case SIOCALIFADDR: 59055009Sshin { 59155009Sshin struct in_aliasreq ifra; 59255009Sshin 59355009Sshin if (iflr->flags & IFLR_PREFIX) 594184295Sbz return (EINVAL); 59555009Sshin 59655009Sshin /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 59755009Sshin bzero(&ifra, sizeof(ifra)); 59855009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 59955009Sshin sizeof(ifra.ifra_name)); 60055009Sshin 60155917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 60255009Sshin 60355917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 60455009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 60555917Sshin iflr->dstaddr.ss_len); 60655009Sshin } 60755009Sshin 60855009Sshin ifra.ifra_mask.sin_family = AF_INET; 60955009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 61055009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 61155009Sshin 612184295Sbz return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 61355009Sshin } 61455009Sshin case SIOCGLIFADDR: 61555009Sshin case SIOCDLIFADDR: 61655009Sshin { 61755009Sshin struct in_ifaddr *ia; 61855009Sshin struct in_addr mask, candidate, match; 61955009Sshin struct sockaddr_in *sin; 62055009Sshin 62155009Sshin bzero(&mask, sizeof(mask)); 622170855Smjacob bzero(&match, sizeof(match)); 62355009Sshin if (iflr->flags & IFLR_PREFIX) { 62455009Sshin /* lookup a prefix rather than address. */ 62555009Sshin in_len2mask(&mask, iflr->prefixlen); 62655009Sshin 62755009Sshin sin = (struct sockaddr_in *)&iflr->addr; 62855009Sshin match.s_addr = sin->sin_addr.s_addr; 62955009Sshin match.s_addr &= mask.s_addr; 63055009Sshin 63155009Sshin /* if you set extra bits, that's wrong */ 63255009Sshin if (match.s_addr != sin->sin_addr.s_addr) 633184295Sbz return (EINVAL); 63455009Sshin 63555009Sshin } else { 636170855Smjacob /* on getting an address, take the 1st match */ 637170855Smjacob /* on deleting an address, do exact match */ 638170855Smjacob if (cmd != SIOCGLIFADDR) { 63955009Sshin in_len2mask(&mask, 32); 64055009Sshin sin = (struct sockaddr_in *)&iflr->addr; 64155009Sshin match.s_addr = sin->sin_addr.s_addr; 64255009Sshin } 64355009Sshin } 64455009Sshin 64555009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 64655009Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 64755009Sshin continue; 648170855Smjacob if (match.s_addr == 0) 64955009Sshin break; 65055009Sshin candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 65155009Sshin candidate.s_addr &= mask.s_addr; 65255009Sshin if (candidate.s_addr == match.s_addr) 65355009Sshin break; 65455009Sshin } 655184295Sbz if (ifa == NULL) 656184295Sbz return (EADDRNOTAVAIL); 65755009Sshin ia = (struct in_ifaddr *)ifa; 65855009Sshin 65955009Sshin if (cmd == SIOCGLIFADDR) { 66055009Sshin /* fill in the if_laddrreq structure */ 66155009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 66255009Sshin 66355009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 66455009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 66555009Sshin ia->ia_dstaddr.sin_len); 66655009Sshin } else 66755009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 66855009Sshin 66955009Sshin iflr->prefixlen = 67055009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 67155009Sshin 67255009Sshin iflr->flags = 0; /*XXX*/ 67355009Sshin 674184295Sbz return (0); 67555009Sshin } else { 67655009Sshin struct in_aliasreq ifra; 67755009Sshin 67855009Sshin /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 67955009Sshin bzero(&ifra, sizeof(ifra)); 68055009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 68155009Sshin sizeof(ifra.ifra_name)); 68255009Sshin 68355009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 68455009Sshin ia->ia_addr.sin_len); 68555009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 68655009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 68755009Sshin ia->ia_dstaddr.sin_len); 68855009Sshin } 68955009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 69055009Sshin ia->ia_sockmask.sin_len); 69155009Sshin 692184295Sbz return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 693184295Sbz ifp, td)); 69455009Sshin } 69555009Sshin } 69655009Sshin } 69755009Sshin 698184295Sbz return (EOPNOTSUPP); /*just for safety*/ 69955009Sshin} 70055009Sshin 70155009Sshin/* 7021541Srgrimes * Delete any existing route for an interface. 7031541Srgrimes */ 70422672Swollmanvoid 705169454Srwatsonin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) 7061541Srgrimes{ 707169454Srwatson 708137628Smlaier in_scrubprefix(ia); 7091541Srgrimes} 7101541Srgrimes 7111541Srgrimes/* 7121541Srgrimes * Initialize an interface's internet address 7131541Srgrimes * and routing table entry. 7141541Srgrimes */ 71512296Sphkstatic int 716169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 717169454Srwatson int scrub) 7181541Srgrimes{ 719183550Szec INIT_VNET_INET(ifp->if_vnet); 7201541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 7211541Srgrimes struct sockaddr_in oldaddr; 72294326Sbrian int s = splimp(), flags = RTF_UP, error = 0; 7231541Srgrimes 7241541Srgrimes oldaddr = ia->ia_addr; 725105748Ssuz if (oldaddr.sin_family == AF_INET) 726105748Ssuz LIST_REMOVE(ia, ia_hash); 7271541Srgrimes ia->ia_addr = *sin; 728105748Ssuz if (ia->ia_addr.sin_family == AF_INET) 729105748Ssuz LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 730105748Ssuz ia, ia_hash); 7311541Srgrimes /* 7321541Srgrimes * Give the interface a chance to initialize 7331541Srgrimes * if this is its first address, 7341541Srgrimes * and to validate the address if necessary. 7351541Srgrimes */ 736184295Sbz if (ifp->if_ioctl != NULL) { 737146883Siedowse IFF_LOCKGIANT(ifp); 738146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 739146883Siedowse IFF_UNLOCKGIANT(ifp); 740146883Siedowse if (error) { 741146883Siedowse splx(s); 742146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 743146883Siedowse ia->ia_addr = oldaddr; 744146883Siedowse if (ia->ia_addr.sin_family == AF_INET) 745146883Siedowse LIST_INSERT_HEAD(INADDR_HASH( 746146883Siedowse ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 747179971Sgonzo else 748179971Sgonzo /* 749179971Sgonzo * If oldaddr family is not AF_INET (e.g. 750179971Sgonzo * interface has been just created) in_control 751179971Sgonzo * does not call LIST_REMOVE, and we end up 752179971Sgonzo * with bogus ia entries in hash 753179971Sgonzo */ 754179971Sgonzo LIST_REMOVE(ia, ia_hash); 755146883Siedowse return (error); 756146883Siedowse } 7571541Srgrimes } 7581541Srgrimes splx(s); 7591541Srgrimes if (scrub) { 7601541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 7611541Srgrimes in_ifscrub(ifp, ia); 7621541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 7631541Srgrimes } 7641541Srgrimes if (IN_CLASSA(i)) 7651541Srgrimes ia->ia_netmask = IN_CLASSA_NET; 7661541Srgrimes else if (IN_CLASSB(i)) 7671541Srgrimes ia->ia_netmask = IN_CLASSB_NET; 7681541Srgrimes else 7691541Srgrimes ia->ia_netmask = IN_CLASSC_NET; 7701541Srgrimes /* 7711541Srgrimes * The subnet mask usually includes at least the standard network part, 7721541Srgrimes * but may may be smaller in the case of supernetting. 7731541Srgrimes * If it is set, we believe it. 7741541Srgrimes */ 7751541Srgrimes if (ia->ia_subnetmask == 0) { 7761541Srgrimes ia->ia_subnetmask = ia->ia_netmask; 7771541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 7781541Srgrimes } else 7791541Srgrimes ia->ia_netmask &= ia->ia_subnetmask; 7801541Srgrimes ia->ia_net = i & ia->ia_netmask; 7811541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 7821541Srgrimes in_socktrim(&ia->ia_sockmask); 783143868Sglebius#ifdef DEV_CARP 7841541Srgrimes /* 785143868Sglebius * XXX: carp(4) does not have interface route 786143868Sglebius */ 787143868Sglebius if (ifp->if_type == IFT_CARP) 788143868Sglebius return (0); 789143868Sglebius#endif 790143868Sglebius /* 7911541Srgrimes * Add route for the network. 7921541Srgrimes */ 7931541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 7941541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 7951541Srgrimes ia->ia_broadaddr.sin_addr.s_addr = 7961541Srgrimes htonl(ia->ia_subnet | ~ia->ia_subnetmask); 7971541Srgrimes ia->ia_netbroadcast.s_addr = 7981541Srgrimes htonl(ia->ia_net | ~ ia->ia_netmask); 7991541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 800137833Smlaier ia->ia_dstaddr = ia->ia_addr; 8011541Srgrimes flags |= RTF_HOST; 8021541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 8031541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 8041541Srgrimes return (0); 8051541Srgrimes flags |= RTF_HOST; 8061541Srgrimes } 807137628Smlaier if ((error = in_addprefix(ia, flags)) != 0) 808137628Smlaier return (error); 80994326Sbrian 8101541Srgrimes return (error); 8111541Srgrimes} 8121541Srgrimes 813137628Smlaier#define rtinitflags(x) \ 814137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 815137628Smlaier ? RTF_HOST : 0) 816137628Smlaier/* 817170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 818137628Smlaier */ 819137628Smlaierstatic int 820169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 821137628Smlaier{ 822183550Szec INIT_VNET_INET(curvnet); 823137628Smlaier struct in_ifaddr *ia; 824151555Sglebius struct in_addr prefix, mask, p, m; 825137628Smlaier int error; 8261541Srgrimes 827170855Smjacob if ((flags & RTF_HOST) != 0) { 828137628Smlaier prefix = target->ia_dstaddr.sin_addr; 829170855Smjacob mask.s_addr = 0; 830170855Smjacob } else { 831137628Smlaier prefix = target->ia_addr.sin_addr; 832137628Smlaier mask = target->ia_sockmask.sin_addr; 833137628Smlaier prefix.s_addr &= mask.s_addr; 834137628Smlaier } 835137628Smlaier 836181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 837151555Sglebius if (rtinitflags(ia)) { 838137628Smlaier p = ia->ia_addr.sin_addr; 839151555Sglebius 840151555Sglebius if (prefix.s_addr != p.s_addr) 841151555Sglebius continue; 842151555Sglebius } else { 843151555Sglebius p = ia->ia_addr.sin_addr; 844151555Sglebius m = ia->ia_sockmask.sin_addr; 845151555Sglebius p.s_addr &= m.s_addr; 846151555Sglebius 847151555Sglebius if (prefix.s_addr != p.s_addr || 848151555Sglebius mask.s_addr != m.s_addr) 849151555Sglebius continue; 850137628Smlaier } 851137628Smlaier 852137628Smlaier /* 853137628Smlaier * If we got a matching prefix route inserted by other 854137628Smlaier * interface address, we are done here. 855137628Smlaier */ 856149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 857181803Sbz if (V_sameprefixcarponly && 858149221Sglebius target->ia_ifp->if_type != IFT_CARP && 859149221Sglebius ia->ia_ifp->if_type != IFT_CARP) 860149221Sglebius return (EEXIST); 861149221Sglebius else 862149221Sglebius return (0); 863149221Sglebius } 864137628Smlaier } 865137628Smlaier 866137628Smlaier /* 867137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 868137628Smlaier */ 869137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 870137628Smlaier if (!error) 871137628Smlaier target->ia_flags |= IFA_ROUTE; 872184295Sbz return (error); 873137628Smlaier} 874137628Smlaier 875186119Sqingliextern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); 876186119Sqingli 8771541Srgrimes/* 878137628Smlaier * If there is no other address in the system that can serve a route to the 879137628Smlaier * same prefix, remove the route. Hand over the route to the new address 880137628Smlaier * otherwise. 881137628Smlaier */ 882137628Smlaierstatic int 883169454Srwatsonin_scrubprefix(struct in_ifaddr *target) 884137628Smlaier{ 885183550Szec INIT_VNET_INET(curvnet); 886137628Smlaier struct in_ifaddr *ia; 887137628Smlaier struct in_addr prefix, mask, p; 888137628Smlaier int error; 889137628Smlaier 890137628Smlaier if ((target->ia_flags & IFA_ROUTE) == 0) 891184295Sbz return (0); 892137628Smlaier 893137628Smlaier if (rtinitflags(target)) 894137628Smlaier prefix = target->ia_dstaddr.sin_addr; 895137628Smlaier else { 896137628Smlaier prefix = target->ia_addr.sin_addr; 897137628Smlaier mask = target->ia_sockmask.sin_addr; 898137628Smlaier prefix.s_addr &= mask.s_addr; 899186119Sqingli /* remove arp cache */ 900186119Sqingli arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 901137628Smlaier } 902137628Smlaier 903181803Sbz TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 904137628Smlaier if (rtinitflags(ia)) 905137628Smlaier p = ia->ia_dstaddr.sin_addr; 906137628Smlaier else { 907137628Smlaier p = ia->ia_addr.sin_addr; 908137628Smlaier p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 909137628Smlaier } 910137628Smlaier 911137628Smlaier if (prefix.s_addr != p.s_addr) 912137628Smlaier continue; 913137628Smlaier 914137628Smlaier /* 915137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 916137628Smlaier * the route itself to it. Make sure that routing daemons 917137628Smlaier * get a heads-up. 918143868Sglebius * 919143868Sglebius * XXX: a special case for carp(4) interface 920137628Smlaier */ 921143868Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0 922143868Sglebius#ifdef DEV_CARP 923143868Sglebius && (ia->ia_ifp->if_type != IFT_CARP) 924143868Sglebius#endif 925143868Sglebius ) { 926137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, 927137628Smlaier rtinitflags(target)); 928137628Smlaier target->ia_flags &= ~IFA_ROUTE; 929137628Smlaier 930137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 931137628Smlaier rtinitflags(ia) | RTF_UP); 932137628Smlaier if (error == 0) 933137628Smlaier ia->ia_flags |= IFA_ROUTE; 934184295Sbz return (error); 935137628Smlaier } 936137628Smlaier } 937137628Smlaier 938137628Smlaier /* 939137628Smlaier * As no-one seem to have this prefix, we can remove the route. 940137628Smlaier */ 941137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 942137628Smlaier target->ia_flags &= ~IFA_ROUTE; 943184295Sbz return (0); 944137628Smlaier} 945137628Smlaier 946137628Smlaier#undef rtinitflags 947137628Smlaier 948137628Smlaier/* 9491541Srgrimes * Return 1 if the address might be a local broadcast address. 9501541Srgrimes */ 9511549Srgrimesint 952169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 9531541Srgrimes{ 9541541Srgrimes register struct ifaddr *ifa; 9551541Srgrimes u_long t; 9561541Srgrimes 9571541Srgrimes if (in.s_addr == INADDR_BROADCAST || 9581541Srgrimes in.s_addr == INADDR_ANY) 959184295Sbz return (1); 9601541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 961184295Sbz return (0); 9621541Srgrimes t = ntohl(in.s_addr); 9631541Srgrimes /* 9641541Srgrimes * Look through the list of addresses for a match 9651541Srgrimes * with a broadcast address. 9661541Srgrimes */ 9671541Srgrimes#define ia ((struct in_ifaddr *)ifa) 96874362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 9691541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 9701541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 9711541Srgrimes in.s_addr == ia->ia_netbroadcast.s_addr || 9721541Srgrimes /* 9731541Srgrimes * Check for old-style (host 0) broadcast. 9741541Srgrimes */ 97513351Sguido t == ia->ia_subnet || t == ia->ia_net) && 97613351Sguido /* 97713351Sguido * Check for an all one subnetmask. These 97813351Sguido * only exist when an interface gets a secondary 97913351Sguido * address. 98013351Sguido */ 98113351Sguido ia->ia_subnetmask != (u_long)0xffffffff) 982184295Sbz return (1); 9831541Srgrimes return (0); 9841541Srgrimes#undef ia 9851541Srgrimes} 986167729Sbms 9871541Srgrimes/* 988167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 989167729Sbms * multicast address records, associated with ifp. 990162718Sbms */ 991167729Sbmsstatic void 992167729Sbmsin_purgemaddrs(struct ifnet *ifp) 993162718Sbms{ 994183550Szec INIT_VNET_INET(ifp->if_vnet); 995162718Sbms struct in_multi *inm; 996162718Sbms struct in_multi *oinm; 997162718Sbms 998168032Sbms#ifdef DIAGNOSTIC 999168032Sbms printf("%s: purging ifp %p\n", __func__, ifp); 1000168032Sbms#endif 1001162718Sbms IFF_LOCKGIANT(ifp); 1002162718Sbms IN_MULTI_LOCK(); 1003181803Sbz LIST_FOREACH_SAFE(inm, &V_in_multihead, inm_link, oinm) { 1004162718Sbms if (inm->inm_ifp == ifp) 1005162718Sbms in_delmulti_locked(inm); 1006162718Sbms } 1007150853Srwatson IN_MULTI_UNLOCK(); 1008150852Srwatson IFF_UNLOCKGIANT(ifp); 10091541Srgrimes} 1010150296Srwatson 1011150296Srwatson/* 1012150296Srwatson * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1013150296Srwatson */ 1014150296Srwatsonvoid 1015169454Srwatsonin_ifdetach(struct ifnet *ifp) 1016150296Srwatson{ 1017183550Szec INIT_VNET_INET(ifp->if_vnet); 1018150296Srwatson 1019181803Sbz in_pcbpurgeif0(&V_ripcbinfo, ifp); 1020181803Sbz in_pcbpurgeif0(&V_udbinfo, ifp); 1021167729Sbms in_purgemaddrs(ifp); 1022150296Srwatson} 1023186119Sqingli 1024186119Sqingli#include <sys/syslog.h> 1025186119Sqingli#include <net/if_dl.h> 1026186119Sqingli#include <netinet/if_ether.h> 1027186119Sqingli 1028186119Sqinglistruct in_llentry { 1029186119Sqingli struct llentry base; 1030186119Sqingli struct sockaddr_in l3_addr4; 1031186119Sqingli}; 1032186119Sqingli 1033186119Sqinglistatic struct llentry * 1034186119Sqingliin_lltable_new(const struct sockaddr *l3addr, u_int flags) 1035186119Sqingli{ 1036186119Sqingli struct in_llentry *lle; 1037186119Sqingli 1038186119Sqingli lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); 1039186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 1040186119Sqingli return NULL; 1041186119Sqingli 1042186119Sqingli callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); 1043186119Sqingli /* 1044186119Sqingli * For IPv4 this will trigger "arpresolve" to generate 1045186119Sqingli * an ARP request. 1046186119Sqingli */ 1047186119Sqingli lle->base.la_expire = time_second; /* mark expired */ 1048186119Sqingli lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1049186119Sqingli lle->base.lle_refcnt = 1; 1050186119Sqingli LLE_LOCK_INIT(&lle->base); 1051186119Sqingli return &lle->base; 1052186119Sqingli} 1053186119Sqingli 1054186119Sqingli/* 1055186119Sqingli * Deletes an address from the address table. 1056186119Sqingli * This function is called by the timer functions 1057186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 1058186119Sqingli * the caller does the locking. 1059186119Sqingli */ 1060186119Sqinglistatic void 1061186119Sqingliin_lltable_free(struct lltable *llt, struct llentry *lle) 1062186119Sqingli{ 1063186119Sqingli free(lle, M_LLTABLE); 1064186119Sqingli} 1065186119Sqingli 1066186119Sqinglistatic int 1067186119Sqingliin_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 1068186119Sqingli{ 1069186119Sqingli struct rtentry *rt; 1070186119Sqingli 1071186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1072186119Sqingli ("sin_family %d", l3addr->sa_family)); 1073186119Sqingli 1074186119Sqingli /* XXX rtalloc1 should take a const param */ 1075186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1076186119Sqingli if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 1077186119Sqingli log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1078186119Sqingli inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1079186119Sqingli if (rt != NULL) 1080186119Sqingli RTFREE_LOCKED(rt); 1081186119Sqingli return (EINVAL); 1082186119Sqingli } 1083186119Sqingli RTFREE_LOCKED(rt); 1084186119Sqingli return 0; 1085186119Sqingli} 1086186119Sqingli 1087186119Sqingli/* 1088186119Sqingli * Return NULL if not found or marked for deletion. 1089186119Sqingli * If found return lle read locked. 1090186119Sqingli */ 1091186119Sqinglistatic struct llentry * 1092186119Sqingliin_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1093186119Sqingli{ 1094186119Sqingli const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1095186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1096186119Sqingli struct llentry *lle; 1097186119Sqingli struct llentries *lleh; 1098186119Sqingli u_int hashkey; 1099186119Sqingli 1100186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 1101186119Sqingli KASSERT(l3addr->sa_family == AF_INET, 1102186119Sqingli ("sin_family %d", l3addr->sa_family)); 1103186119Sqingli 1104186119Sqingli hashkey = sin->sin_addr.s_addr; 1105186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1106186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 1107186119Sqingli if (lle->la_flags & LLE_DELETED) 1108186119Sqingli continue; 1109186119Sqingli if (bcmp(L3_ADDR(lle), l3addr, sizeof(struct sockaddr_in)) == 0) 1110186119Sqingli break; 1111186119Sqingli } 1112186119Sqingli if (lle == NULL) { 1113186119Sqingli#ifdef DIAGNOSTICS 1114186119Sqingli if (flags & LLE_DELETE) 1115186119Sqingli log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1116186119Sqingli#endif 1117186119Sqingli if (!(flags & LLE_CREATE)) 1118186119Sqingli return (NULL); 1119186119Sqingli /* 1120186119Sqingli * A route that covers the given address must have 1121186119Sqingli * been installed 1st because we are doing a resolution, 1122186119Sqingli * verify this. 1123186119Sqingli */ 1124186119Sqingli if (!(flags & LLE_IFADDR) && 1125186119Sqingli in_lltable_rtcheck(ifp, l3addr) != 0) 1126186119Sqingli goto done; 1127186119Sqingli 1128186119Sqingli lle = in_lltable_new(l3addr, flags); 1129186119Sqingli if (lle == NULL) { 1130186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1131186119Sqingli goto done; 1132186119Sqingli } 1133186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 1134186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1135186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1136186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 1137186119Sqingli } 1138186119Sqingli 1139186119Sqingli lle->lle_tbl = llt; 1140186119Sqingli lle->lle_head = lleh; 1141186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 1142186119Sqingli } else if (flags & LLE_DELETE) { 1143186119Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1144186119Sqingli LLE_WLOCK(lle); 1145186119Sqingli lle->la_flags = LLE_DELETED; 1146186119Sqingli LLE_WUNLOCK(lle); 1147186119Sqingli#ifdef DIAGNOSTICS 1148186119Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1149186119Sqingli#endif 1150186119Sqingli } 1151186119Sqingli lle = (void *)-1; 1152186119Sqingli 1153186119Sqingli } 1154186119Sqingli if (lle != NULL && lle != (void *)-1) { 1155186119Sqingli if (flags & LLE_EXCLUSIVE) 1156186119Sqingli LLE_WLOCK(lle); 1157186119Sqingli else 1158186119Sqingli LLE_RLOCK(lle); 1159186119Sqingli } 1160186119Sqinglidone: 1161186119Sqingli return (lle); 1162186119Sqingli} 1163186119Sqingli 1164186119Sqinglistatic int 1165186119Sqingliin_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1166186119Sqingli{ 1167186119Sqingli#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1168186119Sqingli struct ifnet *ifp = llt->llt_ifp; 1169186119Sqingli struct llentry *lle; 1170186119Sqingli /* XXX stack use */ 1171186119Sqingli struct { 1172186119Sqingli struct rt_msghdr rtm; 1173186119Sqingli struct sockaddr_inarp sin; 1174186119Sqingli struct sockaddr_dl sdl; 1175186119Sqingli } arpc; 1176186119Sqingli int error, i; 1177186119Sqingli 1178186119Sqingli /* XXXXX 1179186119Sqingli * current IFNET_RLOCK() is mapped to IFNET_WLOCK() 1180186119Sqingli * so it is okay to use this ASSERT, change it when 1181186119Sqingli * IFNET lock is finalized 1182186119Sqingli */ 1183186119Sqingli IFNET_WLOCK_ASSERT(); 1184186119Sqingli 1185186119Sqingli error = 0; 1186186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1187186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1188186119Sqingli struct sockaddr_dl *sdl; 1189186119Sqingli 1190186119Sqingli /* skip deleted entries */ 1191186119Sqingli if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 1192186119Sqingli continue; 1193186119Sqingli /* 1194186119Sqingli * produce a msg made of: 1195186119Sqingli * struct rt_msghdr; 1196186119Sqingli * struct sockaddr_inarp; (IPv4) 1197186119Sqingli * struct sockaddr_dl; 1198186119Sqingli */ 1199186119Sqingli bzero(&arpc, sizeof(arpc)); 1200186119Sqingli arpc.rtm.rtm_msglen = sizeof(arpc); 1201186119Sqingli arpc.sin.sin_family = AF_INET; 1202186119Sqingli arpc.sin.sin_len = sizeof(arpc.sin); 1203186119Sqingli arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1204186119Sqingli 1205186119Sqingli /* publish */ 1206186119Sqingli if (lle->la_flags & LLE_PUB) { 1207186119Sqingli arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1208186119Sqingli /* proxy only */ 1209186119Sqingli if (lle->la_flags & LLE_PROXY) 1210186119Sqingli arpc.sin.sin_other = SIN_PROXY; 1211186119Sqingli } 1212186119Sqingli 1213186119Sqingli sdl = &arpc.sdl; 1214186119Sqingli sdl->sdl_family = AF_LINK; 1215186119Sqingli sdl->sdl_len = sizeof(*sdl); 1216186119Sqingli sdl->sdl_alen = ifp->if_addrlen; 1217186119Sqingli sdl->sdl_index = ifp->if_index; 1218186119Sqingli sdl->sdl_type = ifp->if_type; 1219186119Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1220186119Sqingli 1221186119Sqingli arpc.rtm.rtm_rmx.rmx_expire = 1222186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1223186119Sqingli arpc.rtm.rtm_flags |= RTF_HOST; 1224186119Sqingli if (lle->la_flags & LLE_STATIC) 1225186119Sqingli arpc.rtm.rtm_flags |= RTF_STATIC; 1226186119Sqingli arpc.rtm.rtm_index = ifp->if_index; 1227186119Sqingli error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1228186119Sqingli if (error) 1229186119Sqingli break; 1230186119Sqingli } 1231186119Sqingli } 1232186119Sqingli return error; 1233186119Sqingli#undef SIN 1234186119Sqingli} 1235186119Sqingli 1236186119Sqinglivoid * 1237186119Sqingliin_domifattach(struct ifnet *ifp) 1238186119Sqingli{ 1239186119Sqingli struct lltable *llt = lltable_init(ifp, AF_INET); 1240186119Sqingli 1241186119Sqingli if (llt != NULL) { 1242186119Sqingli llt->llt_new = in_lltable_new; 1243186119Sqingli llt->llt_free = in_lltable_free; 1244186119Sqingli llt->llt_rtcheck = in_lltable_rtcheck; 1245186119Sqingli llt->llt_lookup = in_lltable_lookup; 1246186119Sqingli llt->llt_dump = in_lltable_dump; 1247186119Sqingli } 1248186119Sqingli return (llt); 1249186119Sqingli} 1250186119Sqingli 1251186119Sqinglivoid 1252186119Sqingliin_domifdetach(struct ifnet *ifp __unused, void *aux) 1253186119Sqingli{ 1254186119Sqingli struct lltable *llt = (struct lltable *)aux; 1255186119Sqingli 1256186119Sqingli lltable_free(llt); 1257186119Sqingli} 1258