in.c revision 170855
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 3150477Speter * $FreeBSD: head/sys/netinet/in.c 170855 2007-06-17 00:31:24Z mjacob $ 321541Srgrimes */ 331541Srgrimes 34143868Sglebius#include "opt_carp.h" 35143868Sglebius 361541Srgrimes#include <sys/param.h> 371549Srgrimes#include <sys/systm.h> 3824204Sbde#include <sys/sockio.h> 391541Srgrimes#include <sys/malloc.h> 40164033Srwatson#include <sys/priv.h> 411541Srgrimes#include <sys/socket.h> 4212704Sphk#include <sys/kernel.h> 4312704Sphk#include <sys/sysctl.h> 441541Srgrimes 451541Srgrimes#include <net/if.h> 4655009Sshin#include <net/if_types.h> 471541Srgrimes#include <net/route.h> 481541Srgrimes 491541Srgrimes#include <netinet/in.h> 501541Srgrimes#include <netinet/in_var.h> 5181127Sume#include <netinet/in_pcb.h> 52170613Sbms#include <netinet/ip_var.h> 531541Srgrimes 5492723Salfredstatic int in_mask2len(struct in_addr *); 5592723Salfredstatic void in_len2mask(struct in_addr *, int); 5692723Salfredstatic int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 5792723Salfred struct ifnet *, struct thread *); 5855009Sshin 59137628Smlaierstatic int in_addprefix(struct in_ifaddr *, int); 60137628Smlaierstatic int in_scrubprefix(struct in_ifaddr *); 6192723Salfredstatic void in_socktrim(struct sockaddr_in *); 6292723Salfredstatic int in_ifinit(struct ifnet *, 6392723Salfred struct in_ifaddr *, struct sockaddr_in *, int); 64167729Sbmsstatic void in_purgemaddrs(struct ifnet *); 651541Srgrimes 6618193Swollmanstatic int subnetsarelocal = 0; 67133874SrwatsonSYSCTL_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, 68123998Sru &subnetsarelocal, 0, "Treat all subnets as directly connected"); 69149221Sglebiusstatic int sameprefixcarponly = 0; 70149221SglebiusSYSCTL_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, 71149221Sglebius &sameprefixcarponly, 0, 72149221Sglebius "Refuse to create same prefixes on different interfaces"); 7321666Swollman 7481127Sumeextern struct inpcbinfo ripcbinfo; 7581127Sumeextern struct inpcbinfo udbinfo; 7681127Sume 771541Srgrimes/* 781541Srgrimes * Return 1 if an internet address is for a ``local'' host 791541Srgrimes * (one to which we have a connection). If subnetsarelocal 801541Srgrimes * is true, this includes other subnets of the local net. 811541Srgrimes * Otherwise, it includes only the directly-connected (sub)nets. 821541Srgrimes */ 831549Srgrimesint 84169454Srwatsonin_localaddr(struct in_addr in) 851541Srgrimes{ 861541Srgrimes register u_long i = ntohl(in.s_addr); 871541Srgrimes register struct in_ifaddr *ia; 881541Srgrimes 891541Srgrimes if (subnetsarelocal) { 9074362Sphk TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) 911541Srgrimes if ((i & ia->ia_netmask) == ia->ia_net) 921541Srgrimes return (1); 931541Srgrimes } else { 9472012Sphk TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) 951541Srgrimes if ((i & ia->ia_subnetmask) == ia->ia_subnet) 961541Srgrimes return (1); 971541Srgrimes } 981541Srgrimes return (0); 991541Srgrimes} 1001541Srgrimes 1011541Srgrimes/* 102133486Sandre * Return 1 if an internet address is for the local host and configured 103133486Sandre * on one of its interfaces. 104133486Sandre */ 105133486Sandreint 106169454Srwatsonin_localip(struct in_addr in) 107133486Sandre{ 108133486Sandre struct in_ifaddr *ia; 109133486Sandre 110133486Sandre LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 111133486Sandre if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) 112133486Sandre return 1; 113133486Sandre } 114133486Sandre return 0; 115133486Sandre} 116133486Sandre 117133486Sandre/* 1181541Srgrimes * Determine whether an IP address is in a reserved set of addresses 1191541Srgrimes * that may not be forwarded, or whether datagrams to that destination 1201541Srgrimes * may be forwarded. 1211541Srgrimes */ 1221549Srgrimesint 123169454Srwatsonin_canforward(struct in_addr in) 1241541Srgrimes{ 1251541Srgrimes register u_long i = ntohl(in.s_addr); 1261541Srgrimes register u_long net; 1271541Srgrimes 128166450Sbms if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 1291541Srgrimes return (0); 1301541Srgrimes if (IN_CLASSA(i)) { 1311541Srgrimes net = i & IN_CLASSA_NET; 1321541Srgrimes if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 1331541Srgrimes return (0); 1341541Srgrimes } 1351541Srgrimes return (1); 1361541Srgrimes} 1371541Srgrimes 1381541Srgrimes/* 1391541Srgrimes * Trim a mask in a sockaddr 1401541Srgrimes */ 14112296Sphkstatic void 142169454Srwatsonin_socktrim(struct sockaddr_in *ap) 1431541Srgrimes{ 1441541Srgrimes register char *cplim = (char *) &ap->sin_addr; 1451541Srgrimes register char *cp = (char *) (&ap->sin_addr + 1); 1461541Srgrimes 1471541Srgrimes ap->sin_len = 0; 1484127Swollman while (--cp >= cplim) 149133874Srwatson if (*cp) { 1501541Srgrimes (ap)->sin_len = cp - (char *) (ap) + 1; 1511541Srgrimes break; 1521541Srgrimes } 1531541Srgrimes} 1541541Srgrimes 15555009Sshinstatic int 15655009Sshinin_mask2len(mask) 15755009Sshin struct in_addr *mask; 15855009Sshin{ 15955009Sshin int x, y; 16055009Sshin u_char *p; 16155009Sshin 16255009Sshin p = (u_char *)mask; 16355009Sshin for (x = 0; x < sizeof(*mask); x++) { 16455009Sshin if (p[x] != 0xff) 16555009Sshin break; 16655009Sshin } 16755009Sshin y = 0; 16855009Sshin if (x < sizeof(*mask)) { 16955009Sshin for (y = 0; y < 8; y++) { 17055009Sshin if ((p[x] & (0x80 >> y)) == 0) 17155009Sshin break; 17255009Sshin } 17355009Sshin } 17455009Sshin return x * 8 + y; 17555009Sshin} 17655009Sshin 17755009Sshinstatic void 178169454Srwatsonin_len2mask(struct in_addr *mask, int len) 17955009Sshin{ 18055009Sshin int i; 18155009Sshin u_char *p; 18255009Sshin 18355009Sshin p = (u_char *)mask; 18455009Sshin bzero(mask, sizeof(*mask)); 18555009Sshin for (i = 0; i < len / 8; i++) 18655009Sshin p[i] = 0xff; 18755009Sshin if (len % 8) 18855009Sshin p[i] = (0xff00 >> (len % 8)) & 0xff; 18955009Sshin} 19055009Sshin 1911541Srgrimes/* 1921541Srgrimes * Generic internet control operations (ioctl's). 1931541Srgrimes * Ifp is 0 if not an interface-specific ioctl. 1941541Srgrimes */ 1951541Srgrimes/* ARGSUSED */ 1961549Srgrimesint 197169454Srwatsonin_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 198169454Srwatson struct thread *td) 1991541Srgrimes{ 2001541Srgrimes register struct ifreq *ifr = (struct ifreq *)data; 20114632Sfenner register struct in_ifaddr *ia = 0, *iap; 2021541Srgrimes register struct ifaddr *ifa; 203168032Sbms struct in_addr allhosts_addr; 20484102Sjlemon struct in_addr dst; 2051541Srgrimes struct in_ifaddr *oia; 2061541Srgrimes struct in_aliasreq *ifra = (struct in_aliasreq *)data; 2071541Srgrimes struct sockaddr_in oldaddr; 20887124Sbrian int error, hostIsNew, iaIsNew, maskIsNew, s; 209168032Sbms int iaIsFirst; 2101541Srgrimes 211168032Sbms iaIsFirst = 0; 21287124Sbrian iaIsNew = 0; 213168032Sbms allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 21487124Sbrian 21555009Sshin switch (cmd) { 21655009Sshin case SIOCALIFADDR: 217164033Srwatson if (td != NULL) { 218164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 219164033Srwatson if (error) 220164033Srwatson return (error); 221164033Srwatson } 222164033Srwatson if (!ifp) 223164033Srwatson return EINVAL; 224164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 225164033Srwatson 22655009Sshin case SIOCDLIFADDR: 227164033Srwatson if (td != NULL) { 228164033Srwatson error = priv_check(td, PRIV_NET_DELIFADDR); 229164033Srwatson if (error) 230164033Srwatson return (error); 231164033Srwatson } 232164033Srwatson if (!ifp) 233164033Srwatson return EINVAL; 234164033Srwatson return in_lifaddr_ioctl(so, cmd, data, ifp, td); 235164033Srwatson 23655009Sshin case SIOCGLIFADDR: 23755009Sshin if (!ifp) 23855009Sshin return EINVAL; 23983366Sjulian return in_lifaddr_ioctl(so, cmd, data, ifp, td); 24055009Sshin } 24155009Sshin 2421541Srgrimes /* 2431541Srgrimes * Find address for this interface, if it exists. 24414632Sfenner * 24514632Sfenner * If an alias address was specified, find that one instead of 24684102Sjlemon * the first one on the interface, if possible. 2471541Srgrimes */ 24884102Sjlemon if (ifp) { 24984102Sjlemon dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 25084102Sjlemon LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) 25184102Sjlemon if (iap->ia_ifp == ifp && 25284102Sjlemon iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 25384102Sjlemon ia = iap; 25484102Sjlemon break; 25584102Sjlemon } 25684102Sjlemon if (ia == NULL) 25784102Sjlemon TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 25884102Sjlemon iap = ifatoia(ifa); 25984102Sjlemon if (iap->ia_addr.sin_family == AF_INET) { 26014632Sfenner ia = iap; 26114632Sfenner break; 26214632Sfenner } 26314632Sfenner } 264168032Sbms if (ia == NULL) 265168032Sbms iaIsFirst = 1; 26684102Sjlemon } 2671541Srgrimes 2681541Srgrimes switch (cmd) { 2691541Srgrimes 2701541Srgrimes case SIOCAIFADDR: 2711541Srgrimes case SIOCDIFADDR: 27241575Seivind if (ifp == 0) 27341575Seivind return (EADDRNOTAVAIL); 2748071Swollman if (ifra->ifra_addr.sin_family == AF_INET) { 27571999Sphk for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 2768071Swollman if (ia->ia_ifp == ifp && 2778071Swollman ia->ia_addr.sin_addr.s_addr == 2788071Swollman ifra->ifra_addr.sin_addr.s_addr) 2798071Swollman break; 2808071Swollman } 2818876Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) 2828071Swollman && (cmd == SIOCAIFADDR) 2838071Swollman && (ifra->ifra_dstaddr.sin_addr.s_addr 2848071Swollman == INADDR_ANY)) { 2859563Swollman return EDESTADDRREQ; 2868071Swollman } 2871541Srgrimes } 2881541Srgrimes if (cmd == SIOCDIFADDR && ia == 0) 2891541Srgrimes return (EADDRNOTAVAIL); 2901541Srgrimes /* FALLTHROUGH */ 2911541Srgrimes case SIOCSIFADDR: 2921541Srgrimes case SIOCSIFNETMASK: 2931541Srgrimes case SIOCSIFDSTADDR: 294164033Srwatson if (td != NULL) { 295164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 296164033Srwatson if (error) 297164033Srwatson return (error); 298164033Srwatson } 2991541Srgrimes 3001541Srgrimes if (ifp == 0) 30141575Seivind return (EADDRNOTAVAIL); 3021541Srgrimes if (ia == (struct in_ifaddr *)0) { 30320407Swollman ia = (struct in_ifaddr *) 304111119Simp malloc(sizeof *ia, M_IFADDR, M_WAITOK | M_ZERO); 30520407Swollman if (ia == (struct in_ifaddr *)NULL) 3061541Srgrimes return (ENOBUFS); 30715092Sdg /* 30815092Sdg * Protect from ipintr() traversing address list 30915092Sdg * while we're modifying it. 31015092Sdg */ 31115092Sdg s = splnet(); 31220407Swollman ifa = &ia->ia_ifa; 313108033Shsu IFA_LOCK_INIT(ifa); 31420407Swollman ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 31520407Swollman ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 31620407Swollman ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 317108033Shsu ifa->ifa_refcnt = 1; 318108033Shsu TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 319108033Shsu 3201541Srgrimes ia->ia_sockmask.sin_len = 8; 32185740Sdes ia->ia_sockmask.sin_family = AF_INET; 3221541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 3231541Srgrimes ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 3241541Srgrimes ia->ia_broadaddr.sin_family = AF_INET; 3251541Srgrimes } 3261541Srgrimes ia->ia_ifp = ifp; 327151824Sglebius 328151824Sglebius TAILQ_INSERT_TAIL(&in_ifaddrhead, ia, ia_link); 32915092Sdg splx(s); 33087124Sbrian iaIsNew = 1; 3311541Srgrimes } 3321541Srgrimes break; 3331541Srgrimes 3341541Srgrimes case SIOCSIFBRDADDR: 335164033Srwatson if (td != NULL) { 336164033Srwatson error = priv_check(td, PRIV_NET_ADDIFADDR); 337164033Srwatson if (error) 338164033Srwatson return (error); 339164033Srwatson } 3401541Srgrimes /* FALLTHROUGH */ 3411541Srgrimes 3421541Srgrimes case SIOCGIFADDR: 3431541Srgrimes case SIOCGIFNETMASK: 3441541Srgrimes case SIOCGIFDSTADDR: 3451541Srgrimes case SIOCGIFBRDADDR: 3461541Srgrimes if (ia == (struct in_ifaddr *)0) 3471541Srgrimes return (EADDRNOTAVAIL); 3481541Srgrimes break; 3491541Srgrimes } 3501541Srgrimes switch (cmd) { 3511541Srgrimes 3521541Srgrimes case SIOCGIFADDR: 3531541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 35487124Sbrian return (0); 3551541Srgrimes 3561541Srgrimes case SIOCGIFBRDADDR: 3571541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 3581541Srgrimes return (EINVAL); 3591541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 36087124Sbrian return (0); 3611541Srgrimes 3621541Srgrimes case SIOCGIFDSTADDR: 3631541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 3641541Srgrimes return (EINVAL); 3651541Srgrimes *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 36687124Sbrian return (0); 3671541Srgrimes 3681541Srgrimes case SIOCGIFNETMASK: 3691541Srgrimes *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 37087124Sbrian return (0); 3711541Srgrimes 3721541Srgrimes case SIOCSIFDSTADDR: 3731541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 3741541Srgrimes return (EINVAL); 3751541Srgrimes oldaddr = ia->ia_dstaddr; 3761541Srgrimes ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 377146883Siedowse if (ifp->if_ioctl) { 378146883Siedowse IFF_LOCKGIANT(ifp); 379146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 380146883Siedowse (caddr_t)ia); 381146883Siedowse IFF_UNLOCKGIANT(ifp); 382146883Siedowse if (error) { 383146883Siedowse ia->ia_dstaddr = oldaddr; 384146883Siedowse return (error); 385146883Siedowse } 3861541Srgrimes } 3871541Srgrimes if (ia->ia_flags & IFA_ROUTE) { 3881541Srgrimes ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 3891541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 3901541Srgrimes ia->ia_ifa.ifa_dstaddr = 3911541Srgrimes (struct sockaddr *)&ia->ia_dstaddr; 3921541Srgrimes rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 3931541Srgrimes } 39487124Sbrian return (0); 3951541Srgrimes 3961541Srgrimes case SIOCSIFBRDADDR: 3971541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 3981541Srgrimes return (EINVAL); 3991541Srgrimes ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 40087124Sbrian return (0); 4011541Srgrimes 4021541Srgrimes case SIOCSIFADDR: 40387124Sbrian error = in_ifinit(ifp, ia, 40487124Sbrian (struct sockaddr_in *) &ifr->ifr_addr, 1); 40587124Sbrian if (error != 0 && iaIsNew) 40687124Sbrian break; 407168032Sbms if (error == 0) { 408168032Sbms if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST) != 0) 409168032Sbms in_addmulti(&allhosts_addr, ifp); 410126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 411168032Sbms } 41287124Sbrian return (0); 4131541Srgrimes 4141541Srgrimes case SIOCSIFNETMASK: 41585740Sdes ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 41685740Sdes ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 41787124Sbrian return (0); 4181541Srgrimes 4191541Srgrimes case SIOCAIFADDR: 4201541Srgrimes maskIsNew = 0; 4211541Srgrimes hostIsNew = 1; 4221541Srgrimes error = 0; 4231541Srgrimes if (ia->ia_addr.sin_family == AF_INET) { 4241541Srgrimes if (ifra->ifra_addr.sin_len == 0) { 4251541Srgrimes ifra->ifra_addr = ia->ia_addr; 4261541Srgrimes hostIsNew = 0; 4271541Srgrimes } else if (ifra->ifra_addr.sin_addr.s_addr == 4281541Srgrimes ia->ia_addr.sin_addr.s_addr) 4291541Srgrimes hostIsNew = 0; 4301541Srgrimes } 4311541Srgrimes if (ifra->ifra_mask.sin_len) { 4321541Srgrimes in_ifscrub(ifp, ia); 4331541Srgrimes ia->ia_sockmask = ifra->ifra_mask; 43485740Sdes ia->ia_sockmask.sin_family = AF_INET; 4351541Srgrimes ia->ia_subnetmask = 4361541Srgrimes ntohl(ia->ia_sockmask.sin_addr.s_addr); 4371541Srgrimes maskIsNew = 1; 4381541Srgrimes } 4391541Srgrimes if ((ifp->if_flags & IFF_POINTOPOINT) && 4401541Srgrimes (ifra->ifra_dstaddr.sin_family == AF_INET)) { 4411541Srgrimes in_ifscrub(ifp, ia); 4421541Srgrimes ia->ia_dstaddr = ifra->ifra_dstaddr; 4431541Srgrimes maskIsNew = 1; /* We lie; but the effect's the same */ 4441541Srgrimes } 4451541Srgrimes if (ifra->ifra_addr.sin_family == AF_INET && 4461541Srgrimes (hostIsNew || maskIsNew)) 4471541Srgrimes error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 44887124Sbrian if (error != 0 && iaIsNew) 44987124Sbrian break; 45087124Sbrian 4511541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) && 4521541Srgrimes (ifra->ifra_broadaddr.sin_family == AF_INET)) 4531541Srgrimes ia->ia_broadaddr = ifra->ifra_broadaddr; 454168032Sbms if (error == 0) { 455168032Sbms if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST) != 0) 456168032Sbms in_addmulti(&allhosts_addr, ifp); 457126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 458168032Sbms } 4591541Srgrimes return (error); 4601541Srgrimes 4611541Srgrimes case SIOCDIFADDR: 46274299Sru /* 46374299Sru * in_ifscrub kills the interface route. 46474299Sru */ 4651541Srgrimes in_ifscrub(ifp, ia); 46615092Sdg /* 46774299Sru * in_ifadown gets rid of all the rest of 46874299Sru * the routes. This is not quite the right 46974299Sru * thing to do, but at least if we are running 47074299Sru * a routing process they will come back. 47174299Sru */ 47276469Sru in_ifadown(&ia->ia_ifa, 1); 473126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 47487124Sbrian error = 0; 4751541Srgrimes break; 4761541Srgrimes 4771541Srgrimes default: 4781541Srgrimes if (ifp == 0 || ifp->if_ioctl == 0) 4791541Srgrimes return (EOPNOTSUPP); 480146883Siedowse IFF_LOCKGIANT(ifp); 481146883Siedowse error = (*ifp->if_ioctl)(ifp, cmd, data); 482146883Siedowse IFF_UNLOCKGIANT(ifp); 483146883Siedowse return (error); 4841541Srgrimes } 48587124Sbrian 48687124Sbrian /* 48787124Sbrian * Protect from ipintr() traversing address list while we're modifying 48887124Sbrian * it. 48987124Sbrian */ 49087124Sbrian s = splnet(); 49187124Sbrian TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 49287124Sbrian TAILQ_REMOVE(&in_ifaddrhead, ia, ia_link); 493168032Sbms if (ia->ia_addr.sin_family == AF_INET) { 494154777Sandre LIST_REMOVE(ia, ia_hash); 495168032Sbms /* 496168032Sbms * If this is the last IPv4 address configured on this 497168032Sbms * interface, leave the all-hosts group. 498168032Sbms * XXX: This is quite ugly because of locking and structure. 499168032Sbms */ 500168032Sbms oia = NULL; 501168032Sbms IFP_TO_IA(ifp, oia); 502168032Sbms if (oia == NULL) { 503168032Sbms struct in_multi *inm; 504168032Sbms 505168032Sbms IFF_LOCKGIANT(ifp); 506168032Sbms IN_MULTI_LOCK(); 507168032Sbms IN_LOOKUP_MULTI(allhosts_addr, ifp, inm); 508168032Sbms if (inm != NULL) 509168032Sbms in_delmulti_locked(inm); 510168032Sbms IN_MULTI_UNLOCK(); 511168032Sbms IFF_UNLOCKGIANT(ifp); 512168032Sbms } 513168032Sbms } 51487124Sbrian IFAFREE(&ia->ia_ifa); 51587124Sbrian splx(s); 51687124Sbrian 51787124Sbrian return (error); 5181541Srgrimes} 5191541Srgrimes 5201541Srgrimes/* 52155009Sshin * SIOC[GAD]LIFADDR. 52255009Sshin * SIOCGLIFADDR: get first address. (?!?) 52355009Sshin * SIOCGLIFADDR with IFLR_PREFIX: 52455009Sshin * get first address that matches the specified prefix. 52555009Sshin * SIOCALIFADDR: add the specified address. 52655009Sshin * SIOCALIFADDR with IFLR_PREFIX: 52755009Sshin * EINVAL since we can't deduce hostid part of the address. 52855009Sshin * SIOCDLIFADDR: delete the specified address. 52955009Sshin * SIOCDLIFADDR with IFLR_PREFIX: 53055009Sshin * delete the first address that matches the specified prefix. 53155009Sshin * return values: 53255009Sshin * EINVAL on invalid parameters 53355009Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 53455009Sshin * other values may be returned from in_ioctl() 53555009Sshin */ 53655009Sshinstatic int 537169454Srwatsonin_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 538169454Srwatson struct ifnet *ifp, struct thread *td) 53955009Sshin{ 54055009Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 54155009Sshin struct ifaddr *ifa; 54255009Sshin 54355009Sshin /* sanity checks */ 54455009Sshin if (!data || !ifp) { 54555009Sshin panic("invalid argument to in_lifaddr_ioctl"); 54655009Sshin /*NOTRECHED*/ 54755009Sshin } 54855009Sshin 54955009Sshin switch (cmd) { 55055009Sshin case SIOCGLIFADDR: 55155009Sshin /* address must be specified on GET with IFLR_PREFIX */ 55255009Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 55355009Sshin break; 55455009Sshin /*FALLTHROUGH*/ 55555009Sshin case SIOCALIFADDR: 55655009Sshin case SIOCDLIFADDR: 55755009Sshin /* address must be specified on ADD and DELETE */ 55855917Sshin if (iflr->addr.ss_family != AF_INET) 55955009Sshin return EINVAL; 56055917Sshin if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 56155009Sshin return EINVAL; 56255009Sshin /* XXX need improvement */ 56355917Sshin if (iflr->dstaddr.ss_family 56455917Sshin && iflr->dstaddr.ss_family != AF_INET) 56555009Sshin return EINVAL; 56655917Sshin if (iflr->dstaddr.ss_family 56755917Sshin && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 56855009Sshin return EINVAL; 56955009Sshin break; 57055009Sshin default: /*shouldn't happen*/ 57155009Sshin return EOPNOTSUPP; 57255009Sshin } 57355009Sshin if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 57455009Sshin return EINVAL; 57555009Sshin 57655009Sshin switch (cmd) { 57755009Sshin case SIOCALIFADDR: 57855009Sshin { 57955009Sshin struct in_aliasreq ifra; 58055009Sshin 58155009Sshin if (iflr->flags & IFLR_PREFIX) 58255009Sshin return EINVAL; 58355009Sshin 58455009Sshin /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 58555009Sshin bzero(&ifra, sizeof(ifra)); 58655009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 58755009Sshin sizeof(ifra.ifra_name)); 58855009Sshin 58955917Sshin bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 59055009Sshin 59155917Sshin if (iflr->dstaddr.ss_family) { /*XXX*/ 59255009Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 59355917Sshin iflr->dstaddr.ss_len); 59455009Sshin } 59555009Sshin 59655009Sshin ifra.ifra_mask.sin_family = AF_INET; 59755009Sshin ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 59855009Sshin in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 59955009Sshin 60083366Sjulian return in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td); 60155009Sshin } 60255009Sshin case SIOCGLIFADDR: 60355009Sshin case SIOCDLIFADDR: 60455009Sshin { 60555009Sshin struct in_ifaddr *ia; 60655009Sshin struct in_addr mask, candidate, match; 60755009Sshin struct sockaddr_in *sin; 60855009Sshin 60955009Sshin bzero(&mask, sizeof(mask)); 610170855Smjacob bzero(&match, sizeof(match)); 61155009Sshin if (iflr->flags & IFLR_PREFIX) { 61255009Sshin /* lookup a prefix rather than address. */ 61355009Sshin in_len2mask(&mask, iflr->prefixlen); 61455009Sshin 61555009Sshin sin = (struct sockaddr_in *)&iflr->addr; 61655009Sshin match.s_addr = sin->sin_addr.s_addr; 61755009Sshin match.s_addr &= mask.s_addr; 61855009Sshin 61955009Sshin /* if you set extra bits, that's wrong */ 62055009Sshin if (match.s_addr != sin->sin_addr.s_addr) 62155009Sshin return EINVAL; 62255009Sshin 62355009Sshin } else { 624170855Smjacob /* on getting an address, take the 1st match */ 625170855Smjacob /* on deleting an address, do exact match */ 626170855Smjacob if (cmd != SIOCGLIFADDR) { 62755009Sshin in_len2mask(&mask, 32); 62855009Sshin sin = (struct sockaddr_in *)&iflr->addr; 62955009Sshin match.s_addr = sin->sin_addr.s_addr; 63055009Sshin } 63155009Sshin } 63255009Sshin 63355009Sshin TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 63455009Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 63555009Sshin continue; 636170855Smjacob if (match.s_addr == 0) 63755009Sshin break; 63855009Sshin candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 63955009Sshin candidate.s_addr &= mask.s_addr; 64055009Sshin if (candidate.s_addr == match.s_addr) 64155009Sshin break; 64255009Sshin } 64355009Sshin if (!ifa) 64455009Sshin return EADDRNOTAVAIL; 64555009Sshin ia = (struct in_ifaddr *)ifa; 64655009Sshin 64755009Sshin if (cmd == SIOCGLIFADDR) { 64855009Sshin /* fill in the if_laddrreq structure */ 64955009Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 65055009Sshin 65155009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 65255009Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 65355009Sshin ia->ia_dstaddr.sin_len); 65455009Sshin } else 65555009Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 65655009Sshin 65755009Sshin iflr->prefixlen = 65855009Sshin in_mask2len(&ia->ia_sockmask.sin_addr); 65955009Sshin 66055009Sshin iflr->flags = 0; /*XXX*/ 66155009Sshin 66255009Sshin return 0; 66355009Sshin } else { 66455009Sshin struct in_aliasreq ifra; 66555009Sshin 66655009Sshin /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 66755009Sshin bzero(&ifra, sizeof(ifra)); 66855009Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 66955009Sshin sizeof(ifra.ifra_name)); 67055009Sshin 67155009Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 67255009Sshin ia->ia_addr.sin_len); 67355009Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 67455009Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 67555009Sshin ia->ia_dstaddr.sin_len); 67655009Sshin } 67755009Sshin bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 67855009Sshin ia->ia_sockmask.sin_len); 67955009Sshin 68055009Sshin return in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 68183366Sjulian ifp, td); 68255009Sshin } 68355009Sshin } 68455009Sshin } 68555009Sshin 68655009Sshin return EOPNOTSUPP; /*just for safety*/ 68755009Sshin} 68855009Sshin 68955009Sshin/* 6901541Srgrimes * Delete any existing route for an interface. 6911541Srgrimes */ 69222672Swollmanvoid 693169454Srwatsonin_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) 6941541Srgrimes{ 695169454Srwatson 696137628Smlaier in_scrubprefix(ia); 6971541Srgrimes} 6981541Srgrimes 6991541Srgrimes/* 7001541Srgrimes * Initialize an interface's internet address 7011541Srgrimes * and routing table entry. 7021541Srgrimes */ 70312296Sphkstatic int 704169454Srwatsonin_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 705169454Srwatson int scrub) 7061541Srgrimes{ 7071541Srgrimes register u_long i = ntohl(sin->sin_addr.s_addr); 7081541Srgrimes struct sockaddr_in oldaddr; 70994326Sbrian int s = splimp(), flags = RTF_UP, error = 0; 7101541Srgrimes 7111541Srgrimes oldaddr = ia->ia_addr; 712105748Ssuz if (oldaddr.sin_family == AF_INET) 713105748Ssuz LIST_REMOVE(ia, ia_hash); 7141541Srgrimes ia->ia_addr = *sin; 715105748Ssuz if (ia->ia_addr.sin_family == AF_INET) 716105748Ssuz LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 717105748Ssuz ia, ia_hash); 7181541Srgrimes /* 7191541Srgrimes * Give the interface a chance to initialize 7201541Srgrimes * if this is its first address, 7211541Srgrimes * and to validate the address if necessary. 7221541Srgrimes */ 723146883Siedowse if (ifp->if_ioctl) { 724146883Siedowse IFF_LOCKGIANT(ifp); 725146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 726146883Siedowse IFF_UNLOCKGIANT(ifp); 727146883Siedowse if (error) { 728146883Siedowse splx(s); 729146883Siedowse /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 730146883Siedowse ia->ia_addr = oldaddr; 731146883Siedowse if (ia->ia_addr.sin_family == AF_INET) 732146883Siedowse LIST_INSERT_HEAD(INADDR_HASH( 733146883Siedowse ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 734146883Siedowse return (error); 735146883Siedowse } 7361541Srgrimes } 7371541Srgrimes splx(s); 7381541Srgrimes if (scrub) { 7391541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 7401541Srgrimes in_ifscrub(ifp, ia); 7411541Srgrimes ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 7421541Srgrimes } 7431541Srgrimes if (IN_CLASSA(i)) 7441541Srgrimes ia->ia_netmask = IN_CLASSA_NET; 7451541Srgrimes else if (IN_CLASSB(i)) 7461541Srgrimes ia->ia_netmask = IN_CLASSB_NET; 7471541Srgrimes else 7481541Srgrimes ia->ia_netmask = IN_CLASSC_NET; 7491541Srgrimes /* 7501541Srgrimes * The subnet mask usually includes at least the standard network part, 7511541Srgrimes * but may may be smaller in the case of supernetting. 7521541Srgrimes * If it is set, we believe it. 7531541Srgrimes */ 7541541Srgrimes if (ia->ia_subnetmask == 0) { 7551541Srgrimes ia->ia_subnetmask = ia->ia_netmask; 7561541Srgrimes ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 7571541Srgrimes } else 7581541Srgrimes ia->ia_netmask &= ia->ia_subnetmask; 7591541Srgrimes ia->ia_net = i & ia->ia_netmask; 7601541Srgrimes ia->ia_subnet = i & ia->ia_subnetmask; 7611541Srgrimes in_socktrim(&ia->ia_sockmask); 762143868Sglebius#ifdef DEV_CARP 7631541Srgrimes /* 764143868Sglebius * XXX: carp(4) does not have interface route 765143868Sglebius */ 766143868Sglebius if (ifp->if_type == IFT_CARP) 767143868Sglebius return (0); 768143868Sglebius#endif 769143868Sglebius /* 7701541Srgrimes * Add route for the network. 7711541Srgrimes */ 7721541Srgrimes ia->ia_ifa.ifa_metric = ifp->if_metric; 7731541Srgrimes if (ifp->if_flags & IFF_BROADCAST) { 7741541Srgrimes ia->ia_broadaddr.sin_addr.s_addr = 7751541Srgrimes htonl(ia->ia_subnet | ~ia->ia_subnetmask); 7761541Srgrimes ia->ia_netbroadcast.s_addr = 7771541Srgrimes htonl(ia->ia_net | ~ ia->ia_netmask); 7781541Srgrimes } else if (ifp->if_flags & IFF_LOOPBACK) { 779137833Smlaier ia->ia_dstaddr = ia->ia_addr; 7801541Srgrimes flags |= RTF_HOST; 7811541Srgrimes } else if (ifp->if_flags & IFF_POINTOPOINT) { 7821541Srgrimes if (ia->ia_dstaddr.sin_family != AF_INET) 7831541Srgrimes return (0); 7841541Srgrimes flags |= RTF_HOST; 7851541Srgrimes } 786137628Smlaier if ((error = in_addprefix(ia, flags)) != 0) 787137628Smlaier return (error); 78894326Sbrian 7891541Srgrimes return (error); 7901541Srgrimes} 7911541Srgrimes 792137628Smlaier#define rtinitflags(x) \ 793137628Smlaier ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 794137628Smlaier ? RTF_HOST : 0) 795137628Smlaier/* 796170855Smjacob * Check if we have a route for the given prefix already or add one accordingly. 797137628Smlaier */ 798137628Smlaierstatic int 799169454Srwatsonin_addprefix(struct in_ifaddr *target, int flags) 800137628Smlaier{ 801137628Smlaier struct in_ifaddr *ia; 802151555Sglebius struct in_addr prefix, mask, p, m; 803137628Smlaier int error; 8041541Srgrimes 805170855Smjacob if ((flags & RTF_HOST) != 0) { 806137628Smlaier prefix = target->ia_dstaddr.sin_addr; 807170855Smjacob mask.s_addr = 0; 808170855Smjacob } else { 809137628Smlaier prefix = target->ia_addr.sin_addr; 810137628Smlaier mask = target->ia_sockmask.sin_addr; 811137628Smlaier prefix.s_addr &= mask.s_addr; 812137628Smlaier } 813137628Smlaier 814137628Smlaier TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 815151555Sglebius if (rtinitflags(ia)) { 816137628Smlaier p = ia->ia_addr.sin_addr; 817151555Sglebius 818151555Sglebius if (prefix.s_addr != p.s_addr) 819151555Sglebius continue; 820151555Sglebius } else { 821151555Sglebius p = ia->ia_addr.sin_addr; 822151555Sglebius m = ia->ia_sockmask.sin_addr; 823151555Sglebius p.s_addr &= m.s_addr; 824151555Sglebius 825151555Sglebius if (prefix.s_addr != p.s_addr || 826151555Sglebius mask.s_addr != m.s_addr) 827151555Sglebius continue; 828137628Smlaier } 829137628Smlaier 830137628Smlaier /* 831137628Smlaier * If we got a matching prefix route inserted by other 832137628Smlaier * interface address, we are done here. 833137628Smlaier */ 834149221Sglebius if (ia->ia_flags & IFA_ROUTE) { 835149221Sglebius if (sameprefixcarponly && 836149221Sglebius target->ia_ifp->if_type != IFT_CARP && 837149221Sglebius ia->ia_ifp->if_type != IFT_CARP) 838149221Sglebius return (EEXIST); 839149221Sglebius else 840149221Sglebius return (0); 841149221Sglebius } 842137628Smlaier } 843137628Smlaier 844137628Smlaier /* 845137628Smlaier * No-one seem to have this prefix route, so we try to insert it. 846137628Smlaier */ 847137628Smlaier error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 848137628Smlaier if (!error) 849137628Smlaier target->ia_flags |= IFA_ROUTE; 850137628Smlaier return error; 851137628Smlaier} 852137628Smlaier 8531541Srgrimes/* 854137628Smlaier * If there is no other address in the system that can serve a route to the 855137628Smlaier * same prefix, remove the route. Hand over the route to the new address 856137628Smlaier * otherwise. 857137628Smlaier */ 858137628Smlaierstatic int 859169454Srwatsonin_scrubprefix(struct in_ifaddr *target) 860137628Smlaier{ 861137628Smlaier struct in_ifaddr *ia; 862137628Smlaier struct in_addr prefix, mask, p; 863137628Smlaier int error; 864137628Smlaier 865137628Smlaier if ((target->ia_flags & IFA_ROUTE) == 0) 866137628Smlaier return 0; 867137628Smlaier 868137628Smlaier if (rtinitflags(target)) 869137628Smlaier prefix = target->ia_dstaddr.sin_addr; 870137628Smlaier else { 871137628Smlaier prefix = target->ia_addr.sin_addr; 872137628Smlaier mask = target->ia_sockmask.sin_addr; 873137628Smlaier prefix.s_addr &= mask.s_addr; 874137628Smlaier } 875137628Smlaier 876137628Smlaier TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 877137628Smlaier if (rtinitflags(ia)) 878137628Smlaier p = ia->ia_dstaddr.sin_addr; 879137628Smlaier else { 880137628Smlaier p = ia->ia_addr.sin_addr; 881137628Smlaier p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 882137628Smlaier } 883137628Smlaier 884137628Smlaier if (prefix.s_addr != p.s_addr) 885137628Smlaier continue; 886137628Smlaier 887137628Smlaier /* 888137628Smlaier * If we got a matching prefix address, move IFA_ROUTE and 889137628Smlaier * the route itself to it. Make sure that routing daemons 890137628Smlaier * get a heads-up. 891143868Sglebius * 892143868Sglebius * XXX: a special case for carp(4) interface 893137628Smlaier */ 894143868Sglebius if ((ia->ia_flags & IFA_ROUTE) == 0 895143868Sglebius#ifdef DEV_CARP 896143868Sglebius && (ia->ia_ifp->if_type != IFT_CARP) 897143868Sglebius#endif 898143868Sglebius ) { 899137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, 900137628Smlaier rtinitflags(target)); 901137628Smlaier target->ia_flags &= ~IFA_ROUTE; 902137628Smlaier 903137628Smlaier error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 904137628Smlaier rtinitflags(ia) | RTF_UP); 905137628Smlaier if (error == 0) 906137628Smlaier ia->ia_flags |= IFA_ROUTE; 907137628Smlaier return error; 908137628Smlaier } 909137628Smlaier } 910137628Smlaier 911137628Smlaier /* 912137628Smlaier * As no-one seem to have this prefix, we can remove the route. 913137628Smlaier */ 914137628Smlaier rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 915137628Smlaier target->ia_flags &= ~IFA_ROUTE; 916137628Smlaier return 0; 917137628Smlaier} 918137628Smlaier 919137628Smlaier#undef rtinitflags 920137628Smlaier 921137628Smlaier/* 9221541Srgrimes * Return 1 if the address might be a local broadcast address. 9231541Srgrimes */ 9241549Srgrimesint 925169454Srwatsonin_broadcast(struct in_addr in, struct ifnet *ifp) 9261541Srgrimes{ 9271541Srgrimes register struct ifaddr *ifa; 9281541Srgrimes u_long t; 9291541Srgrimes 9301541Srgrimes if (in.s_addr == INADDR_BROADCAST || 9311541Srgrimes in.s_addr == INADDR_ANY) 9321541Srgrimes return 1; 9331541Srgrimes if ((ifp->if_flags & IFF_BROADCAST) == 0) 9341541Srgrimes return 0; 9351541Srgrimes t = ntohl(in.s_addr); 9361541Srgrimes /* 9371541Srgrimes * Look through the list of addresses for a match 9381541Srgrimes * with a broadcast address. 9391541Srgrimes */ 9401541Srgrimes#define ia ((struct in_ifaddr *)ifa) 94174362Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 9421541Srgrimes if (ifa->ifa_addr->sa_family == AF_INET && 9431541Srgrimes (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 9441541Srgrimes in.s_addr == ia->ia_netbroadcast.s_addr || 9451541Srgrimes /* 9461541Srgrimes * Check for old-style (host 0) broadcast. 9471541Srgrimes */ 94813351Sguido t == ia->ia_subnet || t == ia->ia_net) && 94913351Sguido /* 95013351Sguido * Check for an all one subnetmask. These 95113351Sguido * only exist when an interface gets a secondary 95213351Sguido * address. 95313351Sguido */ 95413351Sguido ia->ia_subnetmask != (u_long)0xffffffff) 9551541Srgrimes return 1; 9561541Srgrimes return (0); 9571541Srgrimes#undef ia 9581541Srgrimes} 959167729Sbms 9601541Srgrimes/* 961167729Sbms * Delete all IPv4 multicast address records, and associated link-layer 962167729Sbms * multicast address records, associated with ifp. 963162718Sbms */ 964167729Sbmsstatic void 965167729Sbmsin_purgemaddrs(struct ifnet *ifp) 966162718Sbms{ 967162718Sbms struct in_multi *inm; 968162718Sbms struct in_multi *oinm; 969162718Sbms 970168032Sbms#ifdef DIAGNOSTIC 971168032Sbms printf("%s: purging ifp %p\n", __func__, ifp); 972168032Sbms#endif 973162718Sbms IFF_LOCKGIANT(ifp); 974162718Sbms IN_MULTI_LOCK(); 975162718Sbms LIST_FOREACH_SAFE(inm, &in_multihead, inm_link, oinm) { 976162718Sbms if (inm->inm_ifp == ifp) 977162718Sbms in_delmulti_locked(inm); 978162718Sbms } 979150853Srwatson IN_MULTI_UNLOCK(); 980150852Srwatson IFF_UNLOCKGIANT(ifp); 9811541Srgrimes} 982150296Srwatson 983150296Srwatson/* 984150296Srwatson * On interface removal, clean up IPv4 data structures hung off of the ifnet. 985150296Srwatson */ 986150296Srwatsonvoid 987169454Srwatsonin_ifdetach(struct ifnet *ifp) 988150296Srwatson{ 989150296Srwatson 990150296Srwatson in_pcbpurgeif0(&ripcbinfo, ifp); 991150296Srwatson in_pcbpurgeif0(&udbinfo, ifp); 992167729Sbms in_purgemaddrs(ifp); 993150296Srwatson} 994