| /*- |
| * Copyright (c) 1982, 1986, 1991, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * Copyright (C) 2001 WIDE Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)in.c 8.4 (Berkeley) 1/9/95 |
| */ |
| |
| #include <sys/bsd_cdefs.h> |
| //__FBSDID("$FreeBSD$"); |
| |
| #include "bsd_opt_carp.h" |
| |
| #include <sys/bsd_param.h> |
| #include <sys/bsd_systm.h> |
| #include <sys/bsd_sockio.h> |
| #include <sys/bsd_malloc.h> |
| //#include <sys/bsd_priv.h> |
| #include <sys/bsd_socket.h> |
| //#include <sys/bsd_jail.h> |
| #include <sys/bsd_kernel.h> |
| ////#include <sys/bsd_proc.h> |
| //baoyg//#include <sys/bsd_sysctl.h> |
| #include <sys/bsd_syslog.h> |
| |
| #include <net/bsd_if.h> |
| #include <net/bsd_if_var.h> |
| #include <net/bsd_if_dl.h> |
| #include <net/bsd_if_llatbl.h> |
| #include <net/bsd_if_types.h> |
| #include <net/bsd_route.h> |
| #include <net/bsd_vnet.h> |
| |
| #include <netinet/bsd_in.h> |
| #include <netinet/bsd_in_var.h> |
| #include <netinet/bsd_in_pcb.h> |
| #include <netinet/bsd_ip_var.h> |
| #include <netinet/bsd_igmp_var.h> |
| #include <netinet/bsd_udp.h> |
| #include <netinet/bsd_udp_var.h> |
| |
| static int in_mask2len(struct in_addr *); |
| static void in_len2mask(struct in_addr *, int); |
| static int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, |
| struct ifnet *, struct thread *); |
| |
| static int in_addprefix(struct in_ifaddr *, int); |
| static int in_scrubprefix(struct in_ifaddr *); |
| static void in_socktrim(struct sockaddr_in *); |
| static int in_ifinit(struct ifnet *, |
| struct in_ifaddr *, struct sockaddr_in *, int); |
| static void in_purgemaddrs(struct ifnet *); |
| |
| static VNET_DEFINE(int, subnetsarelocal); |
| static VNET_DEFINE(int, sameprefixcarponly); |
| VNET_DECLARE(struct inpcbinfo, ripcbinfo); |
| |
| #define V_subnetsarelocal VNET(subnetsarelocal) |
| #define V_sameprefixcarponly VNET(sameprefixcarponly) |
| #define V_ripcbinfo VNET(ripcbinfo) |
| /* |
| SYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, |
| &VNET_NAME(subnetsarelocal), 0, |
| "Treat all subnets as directly connected"); |
| SYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, |
| &VNET_NAME(sameprefixcarponly), 0, |
| "Refuse to create same prefixes on different interfaces"); |
| */ |
| /* |
| * Return 1 if an internet address is for a ``local'' host |
| * (one to which we have a connection). If subnetsarelocal |
| * is true, this includes other subnets of the local net. |
| * Otherwise, it includes only the directly-connected (sub)nets. |
| */ |
| int |
| in_localaddr(struct in_addr in) |
| { |
| register u_long i = ntohl(in.s_addr); |
| register struct in_ifaddr *ia; |
| |
| IN_IFADDR_RLOCK(); |
| if (V_subnetsarelocal) { |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if ((i & ia->ia_netmask) == ia->ia_net) { |
| IN_IFADDR_RUNLOCK(); |
| return (1); |
| } |
| } |
| } else { |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if ((i & ia->ia_subnetmask) == ia->ia_subnet) { |
| IN_IFADDR_RUNLOCK(); |
| return (1); |
| } |
| } |
| } |
| IN_IFADDR_RUNLOCK(); |
| return (0); |
| } |
| |
| /* |
| * Return 1 if an internet address is for the local host and configured |
| * on one of its interfaces. |
| */ |
| int |
| in_localip(struct in_addr in) |
| { |
| struct in_ifaddr *ia; |
| |
| IN_IFADDR_RLOCK(); |
| LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { |
| if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { |
| IN_IFADDR_RUNLOCK(); |
| return (1); |
| } |
| } |
| IN_IFADDR_RUNLOCK(); |
| return (0); |
| } |
| |
| /* |
| * Determine whether an IP address is in a reserved set of addresses |
| * that may not be forwarded, or whether datagrams to that destination |
| * may be forwarded. |
| */ |
| int |
| in_canforward(struct in_addr in) |
| { |
| register u_long i = ntohl(in.s_addr); |
| register u_long net; |
| |
| if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) |
| return (0); |
| if (IN_CLASSA(i)) { |
| net = i & IN_CLASSA_NET; |
| if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) |
| return (0); |
| } |
| return (1); |
| } |
| |
| /* |
| * Trim a mask in a sockaddr |
| */ |
| static void |
| in_socktrim(struct sockaddr_in *ap) |
| { |
| register char *cplim = (char *) &ap->sin_addr; |
| register char *cp = (char *) (&ap->sin_addr + 1); |
| |
| ap->sin_len = 0; |
| while (--cp >= cplim) |
| if (*cp) { |
| (ap)->sin_len = cp - (char *) (ap) + 1; |
| break; |
| } |
| } |
| |
| static int |
| in_mask2len(mask) |
| struct in_addr *mask; |
| { |
| int x, y; |
| u_char *p; |
| |
| p = (u_char *)mask; |
| for (x = 0; x < sizeof(*mask); x++) { |
| if (p[x] != 0xff) |
| break; |
| } |
| y = 0; |
| if (x < sizeof(*mask)) { |
| for (y = 0; y < 8; y++) { |
| if ((p[x] & (0x80 >> y)) == 0) |
| break; |
| } |
| } |
| return (x * 8 + y); |
| } |
| |
| static void |
| in_len2mask(struct in_addr *mask, int len) |
| { |
| int i; |
| u_char *p; |
| |
| p = (u_char *)mask; |
| bzero(mask, sizeof(*mask)); |
| for (i = 0; i < len / 8; i++) |
| p[i] = 0xff; |
| if (len % 8) |
| p[i] = (0xff00 >> (len % 8)) & 0xff; |
| } |
| |
| /* |
| * Generic internet control operations (ioctl's). |
| * |
| * ifp is NULL if not an interface-specific ioctl. |
| */ |
| /* ARGSUSED */ |
| int |
| in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, |
| struct thread *td) |
| { |
| register struct ifreq *ifr = (struct ifreq *)data; |
| register struct in_ifaddr *ia, *iap; |
| register struct ifaddr *ifa; |
| struct in_addr allhosts_addr; |
| struct in_addr dst; |
| struct in_ifinfo *ii; |
| struct in_aliasreq *ifra = (struct in_aliasreq *)data; |
| struct sockaddr_in oldaddr; |
| int error, hostIsNew, iaIsNew, maskIsNew; |
| int iaIsFirst; |
| |
| ia = NULL; |
| iaIsFirst = 0; |
| iaIsNew = 0; |
| allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); |
| |
| /* |
| * Filter out ioctls we implement directly; forward the rest on to |
| * in_lifaddr_ioctl() and ifp->if_ioctl(). |
| */ |
| switch (cmd) { |
| case SIOCAIFADDR: |
| case SIOCDIFADDR: |
| case SIOCGIFADDR: |
| case SIOCGIFBRDADDR: |
| case SIOCGIFDSTADDR: |
| case SIOCGIFNETMASK: |
| case SIOCSIFADDR: |
| case SIOCSIFBRDADDR: |
| case SIOCSIFDSTADDR: |
| case SIOCSIFNETMASK: |
| break; |
| |
| case SIOCALIFADDR: |
| if (td != NULL) { |
| //error = priv_check(td, PRIV_NET_ADDIFADDR); |
| if (error) |
| return (error); |
| } |
| if (ifp == NULL) |
| return (EINVAL); |
| return in_lifaddr_ioctl(so, cmd, data, ifp, td); |
| |
| case SIOCDLIFADDR: |
| if (td != NULL) { |
| //error = priv_check(td, PRIV_NET_DELIFADDR); |
| if (error) |
| return (error); |
| } |
| if (ifp == NULL) |
| return (EINVAL); |
| return in_lifaddr_ioctl(so, cmd, data, ifp, td); |
| |
| case SIOCGLIFADDR: |
| if (ifp == NULL) |
| return (EINVAL); |
| return in_lifaddr_ioctl(so, cmd, data, ifp, td); |
| |
| default: |
| if (ifp == NULL || ifp->if_ioctl == NULL) |
| return (EOPNOTSUPP); |
| return ((*ifp->if_ioctl)(ifp, cmd, data)); |
| } |
| |
| if (ifp == NULL) |
| return (EADDRNOTAVAIL); |
| |
| /* |
| * Security checks before we get involved in any work. |
| */ |
| switch (cmd) { |
| case SIOCAIFADDR: |
| case SIOCSIFADDR: |
| case SIOCSIFBRDADDR: |
| case SIOCSIFNETMASK: |
| case SIOCSIFDSTADDR: |
| if (td != NULL) { |
| //error = priv_check(td, PRIV_NET_ADDIFADDR); |
| if (error) |
| return (error); |
| } |
| break; |
| |
| case SIOCDIFADDR: |
| if (td != NULL) { |
| //error = priv_check(td, PRIV_NET_DELIFADDR); |
| if (error) |
| return (error); |
| } |
| break; |
| } |
| |
| /* |
| * Find address for this interface, if it exists. |
| * |
| * If an alias address was specified, find that one instead of the |
| * first one on the interface, if possible. |
| */ |
| dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; |
| IN_IFADDR_RLOCK(); |
| LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { |
| if (iap->ia_ifp == ifp && |
| iap->ia_addr.sin_addr.s_addr == dst.s_addr) { |
| if (td == NULL /*|| prison_check_ip4(td->td_ucred, |
| &dst) == 0*/) |
| ia = iap; |
| break; |
| } |
| } |
| if (ia != NULL) |
| ifa_ref(&ia->ia_ifa); |
| IN_IFADDR_RUNLOCK(); |
| if (ia == NULL) { |
| IF_ADDR_LOCK(ifp); |
| TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| iap = ifatoia(ifa); |
| if (iap->ia_addr.sin_family == AF_INET) { |
| if (td != NULL/* && |
| prison_check_ip4(td->td_ucred, |
| &iap->ia_addr.sin_addr) != 0*/) |
| continue; |
| ia = iap; |
| break; |
| } |
| } |
| if (ia != NULL) |
| ifa_ref(&ia->ia_ifa); |
| IF_ADDR_UNLOCK(ifp); |
| } |
| if (ia == NULL) |
| iaIsFirst = 1; |
| |
| error = 0; |
| switch (cmd) { |
| case SIOCAIFADDR: |
| case SIOCDIFADDR: |
| if (ifra->ifra_addr.sin_family == AF_INET) { |
| struct in_ifaddr *oia; |
| |
| IN_IFADDR_RLOCK(); |
| for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { |
| if (ia->ia_ifp == ifp && |
| ia->ia_addr.sin_addr.s_addr == |
| ifra->ifra_addr.sin_addr.s_addr) |
| break; |
| } |
| if (ia != NULL && ia != oia) |
| ifa_ref(&ia->ia_ifa); |
| if (oia != NULL && ia != oia) |
| ifa_free(&oia->ia_ifa); |
| IN_IFADDR_RUNLOCK(); |
| if ((ifp->if_flags & IFF_POINTOPOINT) |
| && (cmd == SIOCAIFADDR) |
| && (ifra->ifra_dstaddr.sin_addr.s_addr |
| == INADDR_ANY)) { |
| error = EDESTADDRREQ; |
| goto out; |
| } |
| } |
| if (cmd == SIOCDIFADDR && ia == NULL) { |
| error = EADDRNOTAVAIL; |
| goto out; |
| } |
| /* FALLTHROUGH */ |
| case SIOCSIFADDR: |
| case SIOCSIFNETMASK: |
| case SIOCSIFDSTADDR: |
| if (ia == NULL) { |
| ia = (struct in_ifaddr *) |
| bsd_malloc(sizeof *ia, M_IFADDR, M_NOWAIT | |
| M_ZERO); |
| if (ia == NULL) { |
| error = ENOBUFS; |
| goto out; |
| } |
| |
| ifa = &ia->ia_ifa; |
| ifa_init(ifa); |
| ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; |
| ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; |
| ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; |
| |
| ia->ia_sockmask.sin_len = 8; |
| ia->ia_sockmask.sin_family = AF_INET; |
| if (ifp->if_flags & IFF_BROADCAST) { |
| ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); |
| ia->ia_broadaddr.sin_family = AF_INET; |
| } |
| ia->ia_ifp = ifp; |
| |
| ifa_ref(ifa); /* if_addrhead */ |
| IF_ADDR_LOCK(ifp); |
| TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); |
| IF_ADDR_UNLOCK(ifp); |
| ifa_ref(ifa); /* in_ifaddrhead */ |
| IN_IFADDR_WLOCK(); |
| TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); |
| IN_IFADDR_WUNLOCK(); |
| iaIsNew = 1; |
| } |
| break; |
| |
| case SIOCSIFBRDADDR: |
| case SIOCGIFADDR: |
| case SIOCGIFNETMASK: |
| case SIOCGIFDSTADDR: |
| case SIOCGIFBRDADDR: |
| if (ia == NULL) { |
| error = EADDRNOTAVAIL; |
| goto out; |
| } |
| break; |
| } |
| |
| /* |
| * Most paths in this switch return directly or via out. Only paths |
| * that remove the address break in order to hit common removal code. |
| */ |
| switch (cmd) { |
| case SIOCGIFADDR: |
| *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; |
| goto out; |
| |
| case SIOCGIFBRDADDR: |
| if ((ifp->if_flags & IFF_BROADCAST) == 0) { |
| error = EINVAL; |
| goto out; |
| } |
| *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; |
| goto out; |
| |
| case SIOCGIFDSTADDR: |
| if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { |
| error = EINVAL; |
| goto out; |
| } |
| *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; |
| goto out; |
| |
| case SIOCGIFNETMASK: |
| *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; |
| goto out; |
| |
| case SIOCSIFDSTADDR: |
| if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { |
| error = EINVAL; |
| goto out; |
| } |
| oldaddr = ia->ia_dstaddr; |
| ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; |
| if (ifp->if_ioctl != NULL) { |
| error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, |
| (caddr_t)ia); |
| if (error) { |
| ia->ia_dstaddr = oldaddr; |
| goto out; |
| } |
| } |
| if (ia->ia_flags & IFA_ROUTE) { |
| ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; |
| rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); |
| ia->ia_ifa.ifa_dstaddr = |
| (struct sockaddr *)&ia->ia_dstaddr; |
| rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); |
| } |
| goto out; |
| |
| case SIOCSIFBRDADDR: |
| if ((ifp->if_flags & IFF_BROADCAST) == 0) { |
| error = EINVAL; |
| goto out; |
| } |
| ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; |
| goto out; |
| |
| case SIOCSIFADDR: |
| error = in_ifinit(ifp, ia, |
| (struct sockaddr_in *) &ifr->ifr_addr, 1); |
| if (error != 0 && iaIsNew) |
| break; |
| if (error == 0) { |
| ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); |
| if (iaIsFirst && |
| (ifp->if_flags & IFF_MULTICAST) != 0) { |
| error = in_joingroup(ifp, &allhosts_addr, |
| NULL, &ii->ii_allhosts); |
| } |
| //EVENTHANDLER_INVOKE(ifaddr_event, ifp); |
| } |
| error = 0; |
| goto out; |
| |
| case SIOCSIFNETMASK: |
| ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; |
| ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); |
| goto out; |
| |
| case SIOCAIFADDR: |
| maskIsNew = 0; |
| hostIsNew = 1; |
| error = 0; |
| if (ia->ia_addr.sin_family == AF_INET) { |
| if (ifra->ifra_addr.sin_len == 0) { |
| ifra->ifra_addr = ia->ia_addr; |
| hostIsNew = 0; |
| } else if (ifra->ifra_addr.sin_addr.s_addr == |
| ia->ia_addr.sin_addr.s_addr) |
| hostIsNew = 0; |
| } |
| if (ifra->ifra_mask.sin_len) { |
| /* |
| * QL: XXX |
| * Need to scrub the prefix here in case |
| * the issued command is SIOCAIFADDR with |
| * the same address, but with a different |
| * prefix length. And if the prefix length |
| * is the same as before, then the call is |
| * un-necessarily executed here. |
| */ |
| in_ifscrub(ifp, ia); |
| ia->ia_sockmask = ifra->ifra_mask; |
| ia->ia_sockmask.sin_family = AF_INET; |
| ia->ia_subnetmask = |
| ntohl(ia->ia_sockmask.sin_addr.s_addr); |
| maskIsNew = 1; |
| } |
| if ((ifp->if_flags & IFF_POINTOPOINT) && |
| (ifra->ifra_dstaddr.sin_family == AF_INET)) { |
| in_ifscrub(ifp, ia); |
| ia->ia_dstaddr = ifra->ifra_dstaddr; |
| maskIsNew = 1; /* We lie; but the effect's the same */ |
| } |
| if (ifra->ifra_addr.sin_family == AF_INET && |
| (hostIsNew || maskIsNew)) |
| error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); |
| if (error != 0 && iaIsNew) |
| goto out; |
| |
| if ((ifp->if_flags & IFF_BROADCAST) && |
| (ifra->ifra_broadaddr.sin_family == AF_INET)) |
| ia->ia_broadaddr = ifra->ifra_broadaddr; |
| if (error == 0) { |
| ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); |
| if (iaIsFirst && |
| (ifp->if_flags & IFF_MULTICAST) != 0) { |
| error = in_joingroup(ifp, &allhosts_addr, |
| NULL, &ii->ii_allhosts); |
| } |
| //EVENTHANDLER_INVOKE(ifaddr_event, ifp); |
| } |
| goto out; |
| |
| case SIOCDIFADDR: |
| /* |
| * in_ifscrub kills the interface route. |
| */ |
| in_ifscrub(ifp, ia); |
| |
| /* |
| * in_ifadown gets rid of all the rest of |
| * the routes. This is not quite the right |
| * thing to do, but at least if we are running |
| * a routing process they will come back. |
| */ |
| in_ifadown(&ia->ia_ifa, 1); |
| //EVENTHANDLER_INVOKE(ifaddr_event, ifp); |
| error = 0; |
| break; |
| |
| default: |
| panic("in_control: unsupported ioctl"); |
| } |
| |
| IF_ADDR_LOCK(ifp); |
| TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); |
| IF_ADDR_UNLOCK(ifp); |
| ifa_free(&ia->ia_ifa); /* if_addrhead */ |
| |
| IN_IFADDR_WLOCK(); |
| TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); |
| if (ia->ia_addr.sin_family == AF_INET) { |
| struct in_ifaddr *if_ia; |
| |
| LIST_REMOVE(ia, ia_hash); |
| IN_IFADDR_WUNLOCK(); |
| /* |
| * If this is the last IPv4 address configured on this |
| * interface, leave the all-hosts group. |
| * No state-change report need be transmitted. |
| */ |
| if_ia = NULL; |
| IFP_TO_IA(ifp, if_ia); |
| if (if_ia == NULL) { |
| ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); |
| IN_MULTI_LOCK(); |
| if (ii->ii_allhosts) { |
| (void)in_leavegroup_locked(ii->ii_allhosts, |
| NULL); |
| ii->ii_allhosts = NULL; |
| } |
| IN_MULTI_UNLOCK(); |
| } else |
| ifa_free(&if_ia->ia_ifa); |
| } else |
| IN_IFADDR_WUNLOCK(); |
| ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ |
| out: |
| if (ia != NULL) |
| ifa_free(&ia->ia_ifa); |
| return (error); |
| } |
| |
| /* |
| * SIOC[GAD]LIFADDR. |
| * SIOCGLIFADDR: get first address. (?!?) |
| * SIOCGLIFADDR with IFLR_PREFIX: |
| * get first address that matches the specified prefix. |
| * SIOCALIFADDR: add the specified address. |
| * SIOCALIFADDR with IFLR_PREFIX: |
| * EINVAL since we can't deduce hostid part of the address. |
| * SIOCDLIFADDR: delete the specified address. |
| * SIOCDLIFADDR with IFLR_PREFIX: |
| * delete the first address that matches the specified prefix. |
| * return values: |
| * EINVAL on invalid parameters |
| * EADDRNOTAVAIL on prefix match failed/specified address not found |
| * other values may be returned from in_ioctl() |
| */ |
| static int |
| in_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, |
| struct ifnet *ifp, struct thread *td) |
| { |
| struct if_laddrreq *iflr = (struct if_laddrreq *)data; |
| struct ifaddr *ifa; |
| |
| /* sanity checks */ |
| if (data == NULL || ifp == NULL) { |
| panic("invalid argument to in_lifaddr_ioctl"); |
| /*NOTRECHED*/ |
| } |
| |
| switch (cmd) { |
| case SIOCGLIFADDR: |
| /* address must be specified on GET with IFLR_PREFIX */ |
| if ((iflr->flags & IFLR_PREFIX) == 0) |
| break; |
| /*FALLTHROUGH*/ |
| case SIOCALIFADDR: |
| case SIOCDLIFADDR: |
| /* address must be specified on ADD and DELETE */ |
| if (iflr->addr.ss_family != AF_INET) |
| return (EINVAL); |
| if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) |
| return (EINVAL); |
| /* XXX need improvement */ |
| if (iflr->dstaddr.ss_family |
| && iflr->dstaddr.ss_family != AF_INET) |
| return (EINVAL); |
| if (iflr->dstaddr.ss_family |
| && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) |
| return (EINVAL); |
| break; |
| default: /*shouldn't happen*/ |
| return (EOPNOTSUPP); |
| } |
| if (sizeof(struct in_addr) * 8 < iflr->prefixlen) |
| return (EINVAL); |
| |
| switch (cmd) { |
| case SIOCALIFADDR: |
| { |
| struct in_aliasreq ifra; |
| |
| if (iflr->flags & IFLR_PREFIX) |
| return (EINVAL); |
| |
| /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ |
| bzero(&ifra, sizeof(ifra)); |
| bcopy(iflr->iflr_name, ifra.ifra_name, |
| sizeof(ifra.ifra_name)); |
| |
| bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); |
| |
| if (iflr->dstaddr.ss_family) { /*XXX*/ |
| bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, |
| iflr->dstaddr.ss_len); |
| } |
| |
| ifra.ifra_mask.sin_family = AF_INET; |
| ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); |
| in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); |
| |
| return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); |
| } |
| case SIOCGLIFADDR: |
| case SIOCDLIFADDR: |
| { |
| struct in_ifaddr *ia; |
| struct in_addr mask, candidate, match; |
| struct sockaddr_in *sin; |
| |
| bzero(&mask, sizeof(mask)); |
| bzero(&match, sizeof(match)); |
| if (iflr->flags & IFLR_PREFIX) { |
| /* lookup a prefix rather than address. */ |
| in_len2mask(&mask, iflr->prefixlen); |
| |
| sin = (struct sockaddr_in *)&iflr->addr; |
| match.s_addr = sin->sin_addr.s_addr; |
| match.s_addr &= mask.s_addr; |
| |
| /* if you set extra bits, that's wrong */ |
| if (match.s_addr != sin->sin_addr.s_addr) |
| return (EINVAL); |
| |
| } else { |
| /* on getting an address, take the 1st match */ |
| /* on deleting an address, do exact match */ |
| if (cmd != SIOCGLIFADDR) { |
| in_len2mask(&mask, 32); |
| sin = (struct sockaddr_in *)&iflr->addr; |
| match.s_addr = sin->sin_addr.s_addr; |
| } |
| } |
| |
| TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| if (ifa->ifa_addr->sa_family != AF_INET6) |
| continue; |
| if (match.s_addr == 0) |
| break; |
| candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; |
| candidate.s_addr &= mask.s_addr; |
| if (candidate.s_addr == match.s_addr) |
| break; |
| } |
| if (ifa == NULL) |
| return (EADDRNOTAVAIL); |
| ia = (struct in_ifaddr *)ifa; |
| |
| if (cmd == SIOCGLIFADDR) { |
| /* fill in the if_laddrreq structure */ |
| bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); |
| |
| if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { |
| bcopy(&ia->ia_dstaddr, &iflr->dstaddr, |
| ia->ia_dstaddr.sin_len); |
| } else |
| bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); |
| |
| iflr->prefixlen = |
| in_mask2len(&ia->ia_sockmask.sin_addr); |
| |
| iflr->flags = 0; /*XXX*/ |
| |
| return (0); |
| } else { |
| struct in_aliasreq ifra; |
| |
| /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ |
| bzero(&ifra, sizeof(ifra)); |
| bcopy(iflr->iflr_name, ifra.ifra_name, |
| sizeof(ifra.ifra_name)); |
| |
| bcopy(&ia->ia_addr, &ifra.ifra_addr, |
| ia->ia_addr.sin_len); |
| if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { |
| bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, |
| ia->ia_dstaddr.sin_len); |
| } |
| bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, |
| ia->ia_sockmask.sin_len); |
| |
| return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, |
| ifp, td)); |
| } |
| } |
| } |
| |
| return (EOPNOTSUPP); /*just for safety*/ |
| } |
| |
| /* |
| * Delete any existing route for an interface. |
| */ |
| void |
| in_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) |
| { |
| |
| in_scrubprefix(ia); |
| } |
| |
| /* |
| * Initialize an interface's internet address |
| * and routing table entry. |
| */ |
| static int |
| in_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, |
| int scrub) |
| { |
| register u_long i = ntohl(sin->sin_addr.s_addr); |
| struct sockaddr_in oldaddr; |
| int s = splimp(), flags = RTF_UP, error = 0; |
| |
| oldaddr = ia->ia_addr; |
| if (oldaddr.sin_family == AF_INET) |
| LIST_REMOVE(ia, ia_hash); |
| ia->ia_addr = *sin; |
| if (ia->ia_addr.sin_family == AF_INET) { |
| IN_IFADDR_WLOCK(); |
| LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), |
| ia, ia_hash); |
| IN_IFADDR_WUNLOCK(); |
| } |
| /* |
| * Give the interface a chance to initialize |
| * if this is its first address, |
| * and to validate the address if necessary. |
| */ |
| if (ifp->if_ioctl != NULL) { |
| error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); |
| if (error) { |
| splx(s); |
| /* LIST_REMOVE(ia, ia_hash) is done in in_control */ |
| ia->ia_addr = oldaddr; |
| IN_IFADDR_WLOCK(); |
| if (ia->ia_addr.sin_family == AF_INET) |
| LIST_INSERT_HEAD(INADDR_HASH( |
| ia->ia_addr.sin_addr.s_addr), ia, ia_hash); |
| else |
| /* |
| * If oldaddr family is not AF_INET (e.g. |
| * interface has been just created) in_control |
| * does not call LIST_REMOVE, and we end up |
| * with bogus ia entries in hash |
| */ |
| LIST_REMOVE(ia, ia_hash); |
| IN_IFADDR_WUNLOCK(); |
| return (error); |
| } |
| } |
| splx(s); |
| if (scrub) { |
| ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; |
| in_ifscrub(ifp, ia); |
| ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; |
| } |
| if (IN_CLASSA(i)) |
| ia->ia_netmask = IN_CLASSA_NET; |
| else if (IN_CLASSB(i)) |
| ia->ia_netmask = IN_CLASSB_NET; |
| else |
| ia->ia_netmask = IN_CLASSC_NET; |
| /* |
| * The subnet mask usually includes at least the standard network part, |
| * but may may be smaller in the case of supernetting. |
| * If it is set, we believe it. |
| */ |
| if (ia->ia_subnetmask == 0) { |
| ia->ia_subnetmask = ia->ia_netmask; |
| ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); |
| } else |
| ia->ia_netmask &= ia->ia_subnetmask; |
| ia->ia_net = i & ia->ia_netmask; |
| ia->ia_subnet = i & ia->ia_subnetmask; |
| in_socktrim(&ia->ia_sockmask); |
| #ifdef DEV_CARP |
| /* |
| * XXX: carp(4) does not have interface route |
| */ |
| if (ifp->if_type == IFT_CARP) |
| return (0); |
| #endif |
| /* |
| * Add route for the network. |
| */ |
| ia->ia_ifa.ifa_metric = ifp->if_metric; |
| if (ifp->if_flags & IFF_BROADCAST) { |
| ia->ia_broadaddr.sin_addr.s_addr = |
| htonl(ia->ia_subnet | ~ia->ia_subnetmask); |
| ia->ia_netbroadcast.s_addr = |
| htonl(ia->ia_net | ~ ia->ia_netmask); |
| } else if (ifp->if_flags & IFF_LOOPBACK) { |
| ia->ia_dstaddr = ia->ia_addr; |
| flags |= RTF_HOST; |
| } else if (ifp->if_flags & IFF_POINTOPOINT) { |
| if (ia->ia_dstaddr.sin_family != AF_INET) |
| return (0); |
| flags |= RTF_HOST; |
| } |
| if ((error = in_addprefix(ia, flags)) != 0) |
| return (error); |
| |
| if (ia->ia_addr.sin_addr.s_addr == INADDR_ANY) |
| return (0); |
| |
| /* |
| * add a loopback route to self |
| */ |
| if (V_useloopback && !(ifp->if_flags & IFF_LOOPBACK)) |
| error = ifa_add_loopback_route((struct ifaddr *)ia, |
| (struct sockaddr *)&ia->ia_addr); |
| |
| return (error); |
| } |
| |
| #define rtinitflags(x) \ |
| ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ |
| ? RTF_HOST : 0) |
| /* |
| * Check if we have a route for the given prefix already or add one accordingly. |
| */ |
| static int |
| in_addprefix(struct in_ifaddr *target, int flags) |
| { |
| struct in_ifaddr *ia; |
| struct in_addr prefix, mask, p, m; |
| int error; |
| |
| if ((flags & RTF_HOST) != 0) { |
| prefix = target->ia_dstaddr.sin_addr; |
| mask.s_addr = 0; |
| } else { |
| prefix = target->ia_addr.sin_addr; |
| mask = target->ia_sockmask.sin_addr; |
| prefix.s_addr &= mask.s_addr; |
| } |
| |
| IN_IFADDR_RLOCK(); |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if (rtinitflags(ia)) { |
| p = ia->ia_addr.sin_addr; |
| |
| if (prefix.s_addr != p.s_addr) |
| continue; |
| } else { |
| p = ia->ia_addr.sin_addr; |
| m = ia->ia_sockmask.sin_addr; |
| p.s_addr &= m.s_addr; |
| |
| if (prefix.s_addr != p.s_addr || |
| mask.s_addr != m.s_addr) |
| continue; |
| } |
| |
| /* |
| * If we got a matching prefix route inserted by other |
| * interface address, we are done here. |
| */ |
| if (ia->ia_flags & IFA_ROUTE) { |
| if (V_sameprefixcarponly && |
| target->ia_ifp->if_type != IFT_CARP && |
| ia->ia_ifp->if_type != IFT_CARP) { |
| IN_IFADDR_RUNLOCK(); |
| return (EEXIST); |
| } else { |
| struct route pfx_ro; |
| struct sockaddr_in *pfx_addr; |
| struct rtentry msg_rt; |
| |
| /* QL: XXX |
| * This is a bit questionable because there is no |
| * additional route entry added for an address alias. |
| * Therefore this route report is inaccurate. Perhaps |
| * it's better to supply a empty rtentry as how it |
| * is done in in_scrubprefix(). |
| */ |
| bzero(&pfx_ro, sizeof(pfx_ro)); |
| pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); |
| pfx_addr->sin_len = sizeof(*pfx_addr); |
| pfx_addr->sin_family = AF_INET; |
| pfx_addr->sin_addr = prefix; |
| rtalloc_ign_fib(&pfx_ro, 0, 0); |
| if (pfx_ro.ro_rt != NULL) { |
| msg_rt = *pfx_ro.ro_rt; |
| /* QL: XXX |
| * Point the gateway to the given interface |
| * address as if a new prefix route entry has |
| * been added through the new address alias. |
| * All other parts of the rtentry is accurate, |
| * e.g., rt_key, rt_mask, rt_ifp etc. |
| */ |
| msg_rt.rt_gateway = |
| (struct sockaddr *)&ia->ia_addr; |
| // rt_newaddrmsg(RTM_ADD, |
| // (struct ifaddr *)target, |
| // 0, &msg_rt); |
| RTFREE(pfx_ro.ro_rt); |
| } |
| |
| IN_IFADDR_RUNLOCK(); |
| return (0); |
| } |
| } |
| } |
| IN_IFADDR_RUNLOCK(); |
| |
| /* |
| * No-one seem to have this prefix route, so we try to insert it. |
| */ |
| error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); |
| if (!error) |
| target->ia_flags |= IFA_ROUTE; |
| return (error); |
| } |
| |
| extern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); |
| |
| /* |
| * If there is no other address in the system that can serve a route to the |
| * same prefix, remove the route. Hand over the route to the new address |
| * otherwise. |
| */ |
| static int |
| in_scrubprefix(struct in_ifaddr *target) |
| { |
| struct in_ifaddr *ia; |
| struct in_addr prefix, mask, p; |
| int error; |
| struct sockaddr_in prefix0, mask0; |
| |
| /* |
| * Remove the loopback route to the interface address. |
| * The "useloopback" setting is not consulted because if the |
| * user configures an interface address, turns off this |
| * setting, and then tries to delete that interface address, |
| * checking the current setting of "useloopback" would leave |
| * that interface address loopback route untouched, which |
| * would be wrong. Therefore the interface address loopback route |
| * deletion is unconditional. |
| */ |
| if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && |
| !(target->ia_ifp->if_flags & IFF_LOOPBACK)) { |
| error = ifa_del_loopback_route((struct ifaddr *)target, |
| (struct sockaddr *)&target->ia_addr); |
| /* remove arp cache */ |
| arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); |
| } |
| |
| if ((target->ia_flags & IFA_ROUTE) == 0) { |
| struct rtentry rt; |
| |
| /* QL: XXX |
| * Report a blank rtentry when a route has not been |
| * installed for the given interface address. |
| */ |
| bzero(&rt, sizeof(rt)); |
| // rt_newaddrmsg(RTM_DELETE, |
| // (struct ifaddr *)target, |
| // 0, &rt); |
| return (0); |
| } |
| |
| if (rtinitflags(target)) |
| prefix = target->ia_dstaddr.sin_addr; |
| else { |
| prefix = target->ia_addr.sin_addr; |
| mask = target->ia_sockmask.sin_addr; |
| prefix.s_addr &= mask.s_addr; |
| } |
| |
| IN_IFADDR_RLOCK(); |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if (rtinitflags(ia)) |
| p = ia->ia_dstaddr.sin_addr; |
| else { |
| p = ia->ia_addr.sin_addr; |
| p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; |
| } |
| |
| if (prefix.s_addr != p.s_addr) |
| continue; |
| |
| /* |
| * If we got a matching prefix address, move IFA_ROUTE and |
| * the route itself to it. Make sure that routing daemons |
| * get a heads-up. |
| * |
| * XXX: a special case for carp(4) interface |
| */ |
| if ((ia->ia_flags & IFA_ROUTE) == 0 |
| #ifdef DEV_CARP |
| && (ia->ia_ifp->if_type != IFT_CARP) |
| #endif |
| ) { |
| IN_IFADDR_RUNLOCK(); |
| rtinit(&(target->ia_ifa), (int)RTM_DELETE, |
| rtinitflags(target)); |
| target->ia_flags &= ~IFA_ROUTE; |
| |
| error = rtinit(&ia->ia_ifa, (int)RTM_ADD, |
| rtinitflags(ia) | RTF_UP); |
| if (error == 0) |
| ia->ia_flags |= IFA_ROUTE; |
| return (error); |
| } |
| } |
| IN_IFADDR_RUNLOCK(); |
| |
| /* |
| * remove all L2 entries on the given prefix |
| */ |
| bzero(&prefix0, sizeof(prefix0)); |
| prefix0.sin_len = sizeof(prefix0); |
| prefix0.sin_family = AF_INET; |
| prefix0.sin_addr.s_addr = target->ia_subnet; |
| bzero(&mask0, sizeof(mask0)); |
| mask0.sin_len = sizeof(mask0); |
| mask0.sin_family = AF_INET; |
| mask0.sin_addr.s_addr = target->ia_subnetmask; |
| lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, |
| (struct sockaddr *)&mask0); |
| |
| /* |
| * As no-one seem to have this prefix, we can remove the route. |
| */ |
| rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); |
| target->ia_flags &= ~IFA_ROUTE; |
| return (0); |
| } |
| |
| #undef rtinitflags |
| |
| /* |
| * Return 1 if the address might be a local broadcast address. |
| */ |
| int |
| in_broadcast(struct in_addr in, struct ifnet *ifp) |
| { |
| register struct ifaddr *ifa; |
| u_long t; |
| |
| if (in.s_addr == INADDR_BROADCAST || |
| in.s_addr == INADDR_ANY) |
| return (1); |
| if ((ifp->if_flags & IFF_BROADCAST) == 0) |
| return (0); |
| t = ntohl(in.s_addr); |
| /* |
| * Look through the list of addresses for a match |
| * with a broadcast address. |
| */ |
| #define ia ((struct in_ifaddr *)ifa) |
| TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) |
| if (ifa->ifa_addr->sa_family == AF_INET && |
| (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || |
| in.s_addr == ia->ia_netbroadcast.s_addr || |
| /* |
| * Check for old-style (host 0) broadcast. |
| */ |
| t == ia->ia_subnet || t == ia->ia_net) && |
| /* |
| * Check for an all one subnetmask. These |
| * only exist when an interface gets a secondary |
| * address. |
| */ |
| ia->ia_subnetmask != (u_long)0xffffffff) |
| return (1); |
| return (0); |
| #undef ia |
| } |
| |
| /* |
| * On interface removal, clean up IPv4 data structures hung off of the ifnet. |
| */ |
| void |
| in_ifdetach(struct ifnet *ifp) |
| { |
| |
| in_pcbpurgeif0(&V_ripcbinfo, ifp); |
| in_pcbpurgeif0(&V_udbinfo, ifp); |
| in_purgemaddrs(ifp); |
| } |
| |
| /* |
| * Delete all IPv4 multicast address records, and associated link-layer |
| * multicast address records, associated with ifp. |
| * XXX It looks like domifdetach runs AFTER the link layer cleanup. |
| * XXX This should not race with ifma_protospec being set during |
| * a new allocation, if it does, we have bigger problems. |
| */ |
| static void |
| in_purgemaddrs(struct ifnet *ifp) |
| { |
| LIST_HEAD(,in_multi) purgeinms; |
| struct in_multi *inm, *tinm; |
| struct ifmultiaddr *ifma; |
| |
| LIST_INIT(&purgeinms); |
| IN_MULTI_LOCK(); |
| |
| /* |
| * Extract list of in_multi associated with the detaching ifp |
| * which the PF_INET layer is about to release. |
| * We need to do this as IF_ADDR_LOCK() may be re-acquired |
| * by code further down. |
| */ |
| IF_ADDR_LOCK(ifp); |
| TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { |
| if (ifma->ifma_addr->sa_family != AF_INET || |
| ifma->ifma_protospec == NULL) |
| continue; |
| #if 0 |
| KASSERT(ifma->ifma_protospec != NULL, |
| ("%s: ifma_protospec is NULL", __func__)); |
| #endif |
| inm = (struct in_multi *)ifma->ifma_protospec; |
| LIST_INSERT_HEAD(&purgeinms, inm, inm_link); |
| } |
| IF_ADDR_UNLOCK(ifp); |
| |
| LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { |
| LIST_REMOVE(inm, inm_link); |
| inm_release_locked(inm); |
| } |
| igmp_ifdetach(ifp); |
| |
| IN_MULTI_UNLOCK(); |
| } |
| |
| #include <net/bsd_if_dl.h> |
| #include <netinet/bsd_if_ether.h> |
| |
| struct in_llentry { |
| struct llentry base; |
| struct sockaddr_in l3_addr4; |
| }; |
| |
| static struct llentry * |
| in_lltable_new(const struct sockaddr *l3addr, u_int flags) |
| { |
| struct in_llentry *lle; |
| |
| lle = bsd_malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); |
| if (lle == NULL) /* NB: caller generates msg */ |
| return NULL; |
| |
| callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); |
| /* |
| * For IPv4 this will trigger "arpresolve" to generate |
| * an ARP request. |
| */ |
| lle->base.la_expire = time_second; /* mark expired */ |
| lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; |
| lle->base.lle_refcnt = 1; |
| LLE_LOCK_INIT(&lle->base); |
| return &lle->base; |
| } |
| |
| /* |
| * Deletes an address from the address table. |
| * This function is called by the timer functions |
| * such as arptimer() and nd6_llinfo_timer(), and |
| * the caller does the locking. |
| */ |
| static void |
| in_lltable_free(struct lltable *llt, struct llentry *lle) |
| { |
| LLE_WUNLOCK(lle); |
| LLE_LOCK_DESTROY(lle); |
| bsd_free(lle, M_LLTABLE); |
| } |
| |
| |
| #define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ |
| (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) |
| |
| static void |
| in_lltable_prefix_free(struct lltable *llt, |
| const struct sockaddr *prefix, |
| const struct sockaddr *mask) |
| { |
| const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; |
| const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; |
| struct llentry *lle, *next; |
| register int i; |
| |
| for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { |
| LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { |
| |
| if (IN_ARE_MASKED_ADDR_EQUAL((struct sockaddr_in *)L3_ADDR(lle), |
| pfx, msk)) { |
| callout_drain(&lle->la_timer); |
| LLE_WLOCK(lle); |
| llentry_free(lle); |
| } |
| } |
| } |
| } |
| |
| |
| static int |
| in_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) |
| { |
| struct rtentry *rt; |
| |
| KASSERT(l3addr->sa_family == AF_INET, |
| ("sin_family %d", l3addr->sa_family)); |
| |
| /* XXX rtalloc1 should take a const param */ |
| rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); |
| if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { |
| #ifdef DIAGNOSTIC |
| bsd_log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", |
| inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); |
| #endif |
| if (rt != NULL) |
| RTFREE_LOCKED(rt); |
| return (EINVAL); |
| } |
| RTFREE_LOCKED(rt); |
| return 0; |
| } |
| |
| /* |
| * Return NULL if not found or marked for deletion. |
| * If found return lle read locked. |
| */ |
| static struct llentry * |
| in_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) |
| { |
| const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; |
| struct ifnet *ifp = llt->llt_ifp; |
| struct llentry *lle; |
| struct llentries *lleh; |
| u_int hashkey; |
| |
| IF_AFDATA_LOCK_ASSERT(ifp); |
| KASSERT(l3addr->sa_family == AF_INET, |
| ("sin_family %d", l3addr->sa_family)); |
| |
| hashkey = sin->sin_addr.s_addr; |
| lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; |
| LIST_FOREACH(lle, lleh, lle_next) { |
| struct sockaddr_in *sa2 = (struct sockaddr_in *)L3_ADDR(lle); |
| if (lle->la_flags & LLE_DELETED) |
| continue; |
| if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) |
| break; |
| } |
| if (lle == NULL) { |
| #ifdef DIAGNOSTIC |
| if (flags & LLE_DELETE) |
| bsd_log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); |
| #endif |
| if (!(flags & LLE_CREATE)) |
| return (NULL); |
| /* |
| * A route that covers the given address must have |
| * been installed 1st because we are doing a resolution, |
| * verify this. |
| */ |
| if (!(flags & LLE_IFADDR) && |
| in_lltable_rtcheck(ifp, l3addr) != 0) |
| goto done; |
| |
| lle = in_lltable_new(l3addr, flags); |
| if (lle == NULL) { |
| bsd_log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); |
| goto done; |
| } |
| lle->la_flags = flags & ~LLE_CREATE; |
| if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { |
| bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); |
| lle->la_flags |= (LLE_VALID | LLE_STATIC); |
| } |
| |
| lle->lle_tbl = llt; |
| lle->lle_head = lleh; |
| LIST_INSERT_HEAD(lleh, lle, lle_next); |
| } else if (flags & LLE_DELETE) { |
| if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { |
| LLE_WLOCK(lle); |
| lle->la_flags = LLE_DELETED; |
| LLE_WUNLOCK(lle); |
| #ifdef DIAGNOSTIC |
| bsd_log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); |
| #endif |
| } |
| lle = (void *)-1; |
| |
| } |
| if (LLE_IS_VALID(lle)) { |
| if (flags & LLE_EXCLUSIVE) |
| LLE_WLOCK(lle); |
| else |
| LLE_RLOCK(lle); |
| } |
| done: |
| return (lle); |
| } |
| |
| /* |
| static int |
| in_lltable_dump(struct lltable *llt, struct sysctl_req *wr) |
| { |
| #define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) |
| struct ifnet *ifp = llt->llt_ifp; |
| struct llentry *lle; |
| */ /* XXX stack use */ |
| /* struct { |
| struct rt_msghdr rtm; |
| struct sockaddr_inarp sin; |
| struct sockaddr_dl sdl; |
| } arpc; |
| int error, i; |
| |
| LLTABLE_LOCK_ASSERT(); |
| |
| error = 0; |
| for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { |
| LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { |
| struct sockaddr_dl *sdl; |
| |
| *//* skip deleted entries *//* |
| if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) |
| continue; |
| *//* Skip if jailed and not a valid IP of the prison. *//* |
| if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) |
| continue; |
| *//* |
| * produce a msg made of: |
| * struct rt_msghdr; |
| * struct sockaddr_inarp; (IPv4) |
| * struct sockaddr_dl; |
| *//* |
| bzero(&arpc, sizeof(arpc)); |
| arpc.rtm.rtm_msglen = sizeof(arpc); |
| arpc.rtm.rtm_version = RTM_VERSION; |
| arpc.rtm.rtm_type = RTM_GET; |
| arpc.rtm.rtm_flags = RTF_UP; |
| arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; |
| arpc.sin.sin_family = AF_INET; |
| arpc.sin.sin_len = sizeof(arpc.sin); |
| arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; |
| |
| *//* publish *//* |
| if (lle->la_flags & LLE_PUB) { |
| arpc.rtm.rtm_flags |= RTF_ANNOUNCE; |
| *//* proxy only *//* |
| if (lle->la_flags & LLE_PROXY) |
| arpc.sin.sin_other = SIN_PROXY; |
| } |
| |
| sdl = &arpc.sdl; |
| sdl->sdl_family = AF_LINK; |
| sdl->sdl_len = sizeof(*sdl); |
| sdl->sdl_index = ifp->if_index; |
| sdl->sdl_type = ifp->if_type; |
| if ((lle->la_flags & LLE_VALID) == LLE_VALID) { |
| sdl->sdl_alen = ifp->if_addrlen; |
| bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); |
| } else { |
| sdl->sdl_alen = 0; |
| bzero(LLADDR(sdl), ifp->if_addrlen); |
| } |
| |
| arpc.rtm.rtm_rmx.rmx_expire = |
| lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; |
| arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); |
| if (lle->la_flags & LLE_STATIC) |
| arpc.rtm.rtm_flags |= RTF_STATIC; |
| arpc.rtm.rtm_index = ifp->if_index; |
| error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); |
| if (error) |
| break; |
| } |
| } |
| return error; |
| #undef SIN |
| } |
| */ |
| |
| void * |
| in_domifattach(struct ifnet *ifp) |
| { |
| struct in_ifinfo *ii; |
| struct lltable *llt; |
| |
| ii = bsd_malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); |
| |
| llt = lltable_init(ifp, AF_INET); |
| if (llt != NULL) { |
| llt->llt_new = in_lltable_new; |
| llt->llt_free = in_lltable_free; |
| llt->llt_prefix_free = in_lltable_prefix_free; |
| llt->llt_rtcheck = in_lltable_rtcheck; |
| llt->llt_lookup = in_lltable_lookup; |
| llt->llt_dump = NULL;//in_lltable_dump; |
| } |
| ii->ii_llt = llt; |
| |
| ii->ii_igmp = igmp_domifattach(ifp); |
| |
| return ii; |
| } |
| |
| void |
| in_domifdetach(struct ifnet *ifp, void *aux) |
| { |
| struct in_ifinfo *ii = (struct in_ifinfo *)aux; |
| |
| igmp_domifdetach(ifp); |
| lltable_free(ii->ii_llt); |
| bsd_free(ii, M_IFADDR); |
| } |