/* $OpenBSD: rtsock.c,v 1.25 2002/12/31 02:30:10 itojun Exp $ */ /* $NetBSD: rtsock.c,v 1.18 1996/03/29 00:32:10 cgd Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 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. * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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. */ /* * Copyright (c) 1988, 1991, 1993 * The Regents of the University of California. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. * * @(#)rtsock.c 8.6 (Berkeley) 2/11/95 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct sockaddr route_dst = { 2, PF_ROUTE, }; struct sockaddr route_src = { 2, PF_ROUTE, }; struct sockproto route_proto = { PF_ROUTE, }; struct walkarg { int w_op, w_arg, w_given, w_needed, w_tmemsize; caddr_t w_where, w_tmem; }; static struct mbuf * rt_msg1(int, struct rt_addrinfo *); static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *); static void rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *); /* Sleazy use of local variables throughout file, warning!!!! */ #define dst info.rti_info[RTAX_DST] #define gate info.rti_info[RTAX_GATEWAY] #define netmask info.rti_info[RTAX_NETMASK] #define genmask info.rti_info[RTAX_GENMASK] #define ifpaddr info.rti_info[RTAX_IFP] #define ifaaddr info.rti_info[RTAX_IFA] #define brdaddr info.rti_info[RTAX_BRD] /*ARGSUSED*/ int route_usrreq(so, req, m, nam, control) register struct socket *so; int req; struct mbuf *m, *nam, *control; { register int error = 0; register struct rawcb *rp = sotorawcb(so); int s; if (req == PRU_ATTACH) { MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); so->so_pcb = rp; bzero(so->so_pcb, sizeof(*rp)); } if (req == PRU_DETACH && rp) { int af = rp->rcb_proto.sp_protocol; if (af == AF_INET) route_cb.ip_count--; else if (af == AF_INET6) route_cb.ip6_count--; else if (af == AF_NS) route_cb.ns_count--; else if (af == AF_ISO) route_cb.iso_count--; route_cb.any_count--; } s = splsoftnet(); /* * Don't call raw_usrreq() in the attach case, because * we want to allow non-privileged processes to listen on * and send "safe" commands to the routing socket. */ if (req == PRU_ATTACH) { if (curproc == 0) error = EACCES; else error = raw_attach(so, (int)(long)nam); } else error = raw_usrreq(so, req, m, nam, control); rp = sotorawcb(so); if (req == PRU_ATTACH && rp) { int af = rp->rcb_proto.sp_protocol; if (error) { free((caddr_t)rp, M_PCB); splx(s); return (error); } if (af == AF_INET) route_cb.ip_count++; else if (af == AF_INET6) route_cb.ip6_count++; else if (af == AF_NS) route_cb.ns_count++; else if (af == AF_ISO) route_cb.iso_count++; rp->rcb_faddr = &route_src; route_cb.any_count++; soisconnected(so); so->so_options |= SO_USELOOPBACK; } splx(s); return (error); } /*ARGSUSED*/ int route_output(struct mbuf *m, ...) { register struct rt_msghdr *rtm = 0; register struct radix_node *rn = 0; register struct rtentry *rt = 0; struct rtentry *saved_nrt = 0; struct radix_node_head *rnh; struct rt_addrinfo info; int len, error = 0; struct ifnet *ifp = 0; struct ifaddr *ifa = 0; struct socket *so; va_list ap; va_start(ap, m); so = va_arg(ap, struct socket *); va_end(ap); #define senderr(e) do { error = e; goto flush;} while (0) if (m == 0 || ((m->m_len < sizeof(int32_t)) && (m = m_pullup(m, sizeof(int32_t))) == 0)) return (ENOBUFS); if ((m->m_flags & M_PKTHDR) == 0) panic("route_output"); len = m->m_pkthdr.len; if (len < sizeof(*rtm) || len != mtod(m, struct rt_msghdr *)->rtm_msglen) { dst = 0; senderr(EINVAL); } R_Malloc(rtm, struct rt_msghdr *, len); if (rtm == 0) { dst = 0; senderr(ENOBUFS); } m_copydata(m, 0, len, (caddr_t)rtm); if (rtm->rtm_version != RTM_VERSION) { dst = 0; senderr(EPROTONOSUPPORT); } rtm->rtm_pid = curproc->p_pid; bzero(&info, sizeof(info)); info.rti_addrs = rtm->rtm_addrs; rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); info.rti_flags = rtm->rtm_flags; if (dst == 0 || (dst->sa_family >= AF_MAX)) senderr(EINVAL); if (gate != 0 && (gate->sa_family >= AF_MAX)) senderr(EINVAL); if (genmask) { struct radix_node *t; t = rn_addmask((caddr_t)genmask, 0, 1); if (t && genmask->sa_len >= ((struct sockaddr *)t->rn_key)->sa_len && Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1, ((struct sockaddr *)t->rn_key)->sa_len) - 1) genmask = (struct sockaddr *)(t->rn_key); else senderr(ENOBUFS); } /* * Verify that the caller has the appropriate privilege; RTM_GET * is the only operation the non-superuser is allowed. */ if (rtm->rtm_type != RTM_GET && suser(curproc->p_ucred, &curproc->p_acflag) != 0) senderr(EACCES); switch (rtm->rtm_type) { case RTM_DELETE: error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); if (error == 0) { (rt = saved_nrt)->rt_refcnt++; goto report; } break; case RTM_ADD: if (gate == 0) senderr(EINVAL); error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); if (error == 0 && saved_nrt) { rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &saved_nrt->rt_rmx); saved_nrt->rt_refcnt--; saved_nrt->rt_genmask = genmask; } /* FALLTHROUGH */ case RTM_GET: case RTM_CHANGE: case RTM_LOCK: if ((rnh = rt_tables[dst->sa_family]) == 0) { senderr(EAFNOSUPPORT); } rn = rnh->rnh_lookup(dst, netmask, rnh); if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { senderr(ESRCH); } rt = (struct rtentry *)rn; rt->rt_refcnt++; switch(rtm->rtm_type) { case RTM_GET: report: dst = rt_key(rt); gate = rt->rt_gateway; netmask = rt_mask(rt); genmask = rt->rt_genmask; if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { if ((ifp = rt->rt_ifp) != NULL) { ifpaddr = TAILQ_FIRST(&ifp->if_addrlist)->ifa_addr; ifaaddr = rt->rt_ifa->ifa_addr; if (ifp->if_flags & IFF_POINTOPOINT) brdaddr = rt->rt_ifa->ifa_dstaddr; else brdaddr = 0; rtm->rtm_index = ifp->if_index; } else { ifpaddr = 0; ifaaddr = 0; } } len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, (struct walkarg *)0); if (len > rtm->rtm_msglen) { struct rt_msghdr *new_rtm; R_Malloc(new_rtm, struct rt_msghdr *, len); if (new_rtm == 0) senderr(ENOBUFS); Bcopy(rtm, new_rtm, rtm->rtm_msglen); Free(rtm); rtm = new_rtm; } (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, (struct walkarg *)0); rtm->rtm_flags = rt->rt_flags; rtm->rtm_rmx = rt->rt_rmx; rtm->rtm_addrs = info.rti_addrs; break; case RTM_CHANGE: /* * new gateway could require new ifaddr, ifp; * flags may also be different; ifp may be specified * by ll sockaddr when protocol address is ambiguous */ if ((error = rt_getifa(&info)) != 0) senderr(error); if (gate && rt_setgate(rt, rt_key(rt), gate)) senderr(EDQUOT); if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, ifp); else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || (gate && (ifa = ifa_ifwithroute(rt->rt_flags, rt_key(rt), gate)))) ifp = ifa->ifa_ifp; if (ifa) { register struct ifaddr *oifa = rt->rt_ifa; if (oifa != ifa) { if (oifa && oifa->ifa_rtrequest) oifa->ifa_rtrequest(RTM_DELETE, rt, &info); IFAFREE(rt->rt_ifa); rt->rt_ifa = ifa; ifa->ifa_refcnt++; rt->rt_ifp = ifp; } } rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); if (genmask) rt->rt_genmask = genmask; /* * Fall into */ case RTM_ADD: case RTM_LOCK: rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); rt->rt_rmx.rmx_locks |= (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); break; } break; default: senderr(EOPNOTSUPP); } flush: if (rtm) { if (error) rtm->rtm_errno = error; else rtm->rtm_flags |= RTF_DONE; } if (rt) rtfree(rt); { register struct rawcb *rp = 0; /* * Check to see if we don't want our own messages. */ if ((so->so_options & SO_USELOOPBACK) == 0) { if (route_cb.any_count <= 1) { if (rtm) Free(rtm); m_freem(m); return (error); } /* There is another listener, so construct message */ rp = sotorawcb(so); } if (rp) rp->rcb_proto.sp_family = 0; /* Avoid us */ if (dst) route_proto.sp_protocol = dst->sa_family; if (rtm) { m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); if (m->m_pkthdr.len < rtm->rtm_msglen) { m_freem(m); m = NULL; } else if (m->m_pkthdr.len > rtm->rtm_msglen) m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); Free(rtm); } if (m) raw_input(m, &route_proto, &route_src, &route_dst); if (rp) rp->rcb_proto.sp_family = PF_ROUTE; } return (error); } void rt_setmetrics(which, in, out) u_long which; register struct rt_metrics *in, *out; { #define metric(f, e) if (which & (f)) out->e = in->e; metric(RTV_RPIPE, rmx_recvpipe); metric(RTV_SPIPE, rmx_sendpipe); metric(RTV_SSTHRESH, rmx_ssthresh); metric(RTV_RTT, rmx_rtt); metric(RTV_RTTVAR, rmx_rttvar); metric(RTV_HOPCOUNT, rmx_hopcount); metric(RTV_MTU, rmx_mtu); metric(RTV_EXPIRE, rmx_expire); #undef metric } #define ROUNDUP(a) \ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) static void rt_xaddrs(cp, cplim, rtinfo) register caddr_t cp, cplim; register struct rt_addrinfo *rtinfo; { register struct sockaddr *sa; register int i; bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { if ((rtinfo->rti_addrs & (1 << i)) == 0) continue; rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; ADVANCE(cp, sa); } } /* * Copy data from a buffer back into the indicated mbuf chain, * starting "off" bytes from the beginning, extending the mbuf * chain if necessary. The mbuf needs to be properly initialized * including the setting of m_len. */ void m_copyback(m0, off, len, cp) struct mbuf *m0; register int off; register int len; caddr_t cp; { register int mlen; register struct mbuf *m = m0, *n; int totlen = 0; if (m0 == 0) return; while (off > (mlen = m->m_len)) { off -= mlen; totlen += mlen; if (m->m_next == 0) { n = m_getclr(M_DONTWAIT, m->m_type); if (n == 0) goto out; n->m_len = min(MLEN, len + off); m->m_next = n; } m = m->m_next; } while (len > 0) { mlen = min (m->m_len - off, len); bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); cp += mlen; len -= mlen; mlen += off; off = 0; totlen += mlen; if (len == 0) break; if (m->m_next == 0) { n = m_get(M_DONTWAIT, m->m_type); if (n == 0) break; n->m_len = min(MLEN, len); m->m_next = n; } m = m->m_next; } out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) m->m_pkthdr.len = totlen; } static struct mbuf * rt_msg1(type, rtinfo) int type; register struct rt_addrinfo *rtinfo; { register struct rt_msghdr *rtm; register struct mbuf *m; register int i; register struct sockaddr *sa; int len, dlen; switch (type) { case RTM_DELADDR: case RTM_NEWADDR: len = sizeof(struct ifa_msghdr); break; case RTM_IFINFO: len = sizeof(struct if_msghdr); break; default: len = sizeof(struct rt_msghdr); } if (len > MCLBYTES) panic("rt_msg1"); m = m_gethdr(M_DONTWAIT, MT_DATA); if (m && len > MHLEN) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_free(m); m = NULL; } } if (m == 0) return (m); m->m_pkthdr.len = m->m_len = len; m->m_pkthdr.rcvif = 0; rtm = mtod(m, struct rt_msghdr *); bzero((caddr_t)rtm, len); for (i = 0; i < RTAX_MAX; i++) { if ((sa = rtinfo->rti_info[i]) == NULL) continue; rtinfo->rti_addrs |= (1 << i); dlen = ROUNDUP(sa->sa_len); m_copyback(m, len, dlen, (caddr_t)sa); len += dlen; } if (m->m_pkthdr.len != len) { m_freem(m); return (NULL); } rtm->rtm_msglen = len; rtm->rtm_version = RTM_VERSION; rtm->rtm_type = type; return (m); } static int rt_msg2(type, rtinfo, cp, w) int type; register struct rt_addrinfo *rtinfo; caddr_t cp; struct walkarg *w; { register int i; int len, dlen, second_time = 0; caddr_t cp0; rtinfo->rti_addrs = 0; again: switch (type) { case RTM_DELADDR: case RTM_NEWADDR: len = sizeof(struct ifa_msghdr); break; case RTM_IFINFO: len = sizeof(struct if_msghdr); break; default: len = sizeof(struct rt_msghdr); } if ((cp0 = cp) != NULL) cp += len; for (i = 0; i < RTAX_MAX; i++) { register struct sockaddr *sa; if ((sa = rtinfo->rti_info[i]) == 0) continue; rtinfo->rti_addrs |= (1 << i); dlen = ROUNDUP(sa->sa_len); if (cp) { bcopy((caddr_t)sa, cp, (unsigned)dlen); cp += dlen; } len += dlen; } if (cp == 0 && w != NULL && !second_time) { register struct walkarg *rw = w; rw->w_needed += len; if (rw->w_needed <= 0 && rw->w_where) { if (rw->w_tmemsize < len) { if (rw->w_tmem) free(rw->w_tmem, M_RTABLE); rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, M_NOWAIT); if (rw->w_tmem) rw->w_tmemsize = len; } if (rw->w_tmem) { cp = rw->w_tmem; second_time = 1; goto again; } else rw->w_where = 0; } } if (cp) { register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; rtm->rtm_version = RTM_VERSION; rtm->rtm_type = type; rtm->rtm_msglen = len; } return (len); } /* * This routine is called to generate a message from the routing * socket indicating that a redirect has occurred, a routing lookup * has failed, or that a protocol has detected timeouts to a particular * destination. */ void rt_missmsg(type, rtinfo, flags, error) int type, flags, error; register struct rt_addrinfo *rtinfo; { register struct rt_msghdr *rtm; register struct mbuf *m; struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; if (route_cb.any_count == 0) return; m = rt_msg1(type, rtinfo); if (m == 0) return; rtm = mtod(m, struct rt_msghdr *); rtm->rtm_flags = RTF_DONE | flags; rtm->rtm_errno = error; rtm->rtm_addrs = rtinfo->rti_addrs; route_proto.sp_protocol = sa ? sa->sa_family : 0; raw_input(m, &route_proto, &route_src, &route_dst); } /* * This routine is called to generate a message from the routing * socket indicating that the status of a network interface has changed. */ void rt_ifmsg(ifp) register struct ifnet *ifp; { register struct if_msghdr *ifm; struct mbuf *m; struct rt_addrinfo info; if (route_cb.any_count == 0) return; bzero((caddr_t)&info, sizeof(info)); m = rt_msg1(RTM_IFINFO, &info); if (m == 0) return; ifm = mtod(m, struct if_msghdr *); ifm->ifm_index = ifp->if_index; ifm->ifm_flags = ifp->if_flags; ifm->ifm_data = ifp->if_data; ifm->ifm_addrs = 0; route_proto.sp_protocol = 0; raw_input(m, &route_proto, &route_src, &route_dst); } /* * This is called to generate messages from the routing socket * indicating a network interface has had addresses associated with it. * if we ever reverse the logic and replace messages TO the routing * socket indicate a request to configure interfaces, then it will * be unnecessary as the routing socket will automatically generate * copies of it. */ void rt_newaddrmsg(cmd, ifa, error, rt) int cmd, error; register struct ifaddr *ifa; register struct rtentry *rt; { struct rt_addrinfo info; struct sockaddr *sa = NULL; int pass; struct mbuf *m = NULL; struct ifnet *ifp = ifa->ifa_ifp; if (route_cb.any_count == 0) return; for (pass = 1; pass < 3; pass++) { bzero((caddr_t)&info, sizeof(info)); if ((cmd == RTM_ADD && pass == 1) || (cmd == RTM_DELETE && pass == 2)) { register struct ifa_msghdr *ifam; int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; ifaaddr = sa = ifa->ifa_addr; ifpaddr = TAILQ_FIRST(&ifp->if_addrlist)->ifa_addr; netmask = ifa->ifa_netmask; brdaddr = ifa->ifa_dstaddr; if ((m = rt_msg1(ncmd, &info)) == NULL) continue; ifam = mtod(m, struct ifa_msghdr *); ifam->ifam_index = ifp->if_index; ifam->ifam_metric = ifa->ifa_metric; ifam->ifam_flags = ifa->ifa_flags; ifam->ifam_addrs = info.rti_addrs; } if ((cmd == RTM_ADD && pass == 2) || (cmd == RTM_DELETE && pass == 1)) { register struct rt_msghdr *rtm; if (rt == 0) continue; netmask = rt_mask(rt); dst = sa = rt_key(rt); gate = rt->rt_gateway; if ((m = rt_msg1(cmd, &info)) == NULL) continue; rtm = mtod(m, struct rt_msghdr *); rtm->rtm_index = ifp->if_index; rtm->rtm_flags |= rt->rt_flags; rtm->rtm_errno = error; rtm->rtm_addrs = info.rti_addrs; } route_proto.sp_protocol = sa ? sa->sa_family : 0; raw_input(m, &route_proto, &route_src, &route_dst); } } /* * This is used in dumping the kernel table via sysctl(). */ int sysctl_dumpentry(rn, v) struct radix_node *rn; register void *v; { register struct walkarg *w = v; register struct rtentry *rt = (struct rtentry *)rn; int error = 0, size; struct rt_addrinfo info; if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) return 0; bzero((caddr_t)&info, sizeof(info)); dst = rt_key(rt); gate = rt->rt_gateway; netmask = rt_mask(rt); genmask = rt->rt_genmask; if (rt->rt_ifp) { ifpaddr = TAILQ_FIRST(&rt->rt_ifp->if_addrlist)->ifa_addr; ifaaddr = rt->rt_ifa->ifa_addr; if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) brdaddr = rt->rt_ifa->ifa_dstaddr; } size = rt_msg2(RTM_GET, &info, 0, w); if (w->w_where && w->w_tmem && w->w_needed <= 0) { register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; rtm->rtm_flags = rt->rt_flags; rtm->rtm_use = rt->rt_use; rtm->rtm_rmx = rt->rt_rmx; rtm->rtm_index = rt->rt_ifp->if_index; rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; rtm->rtm_addrs = info.rti_addrs; if ((error = copyout((caddr_t)rtm, w->w_where, size)) != 0) w->w_where = NULL; else w->w_where += size; } return (error); } int sysctl_iflist(af, w) int af; register struct walkarg *w; { register struct ifnet *ifp; register struct ifaddr *ifa; struct rt_addrinfo info; int len, error = 0; bzero((caddr_t)&info, sizeof(info)); TAILQ_FOREACH(ifp, &ifnet, if_list) { if (w->w_arg && w->w_arg != ifp->if_index) continue; ifa = TAILQ_FIRST(&ifp->if_addrlist); if (!ifa) continue; ifpaddr = ifa->ifa_addr; len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); ifpaddr = 0; if (w->w_where && w->w_tmem && w->w_needed <= 0) { register struct if_msghdr *ifm; ifm = (struct if_msghdr *)w->w_tmem; ifm->ifm_index = ifp->if_index; ifm->ifm_flags = ifp->if_flags; ifm->ifm_data = ifp->if_data; ifm->ifm_addrs = info.rti_addrs; error = copyout((caddr_t)ifm, w->w_where, len); if (error) return (error); w->w_where += len; } while ((ifa = TAILQ_NEXT(ifa, ifa_list)) != TAILQ_END(&ifp->if_addrlist)) { if (af && af != ifa->ifa_addr->sa_family) continue; ifaaddr = ifa->ifa_addr; netmask = ifa->ifa_netmask; brdaddr = ifa->ifa_dstaddr; len = rt_msg2(RTM_NEWADDR, &info, 0, w); if (w->w_where && w->w_tmem && w->w_needed <= 0) { register struct ifa_msghdr *ifam; ifam = (struct ifa_msghdr *)w->w_tmem; ifam->ifam_index = ifa->ifa_ifp->if_index; ifam->ifam_flags = ifa->ifa_flags; ifam->ifam_metric = ifa->ifa_metric; ifam->ifam_addrs = info.rti_addrs; error = copyout(w->w_tmem, w->w_where, len); if (error) return (error); w->w_where += len; } } ifaaddr = netmask = brdaddr = 0; } return (0); } int sysctl_rtable(name, namelen, where, given, new, newlen) int *name; u_int namelen; void *where; size_t *given; void *new; size_t newlen; { register struct radix_node_head *rnh; int i, s, error = EINVAL; u_char af; struct walkarg w; if (new) return (EPERM); if (namelen != 3) return (EINVAL); af = name[0]; Bzero(&w, sizeof(w)); w.w_where = where; w.w_given = *given; w.w_needed = 0 - w.w_given; w.w_op = name[1]; w.w_arg = name[2]; s = splsoftnet(); switch (w.w_op) { case NET_RT_DUMP: case NET_RT_FLAGS: for (i = 1; i <= AF_MAX; i++) if ((rnh = rt_tables[i]) && (af == 0 || af == i) && (error = (*rnh->rnh_walktree)(rnh, sysctl_dumpentry, &w))) break; break; case NET_RT_IFLIST: error = sysctl_iflist(af, &w); } splx(s); if (w.w_tmem) free(w.w_tmem, M_RTABLE); w.w_needed += w.w_given; if (where) { *given = w.w_where - (caddr_t) where; if (*given < w.w_needed) return (ENOMEM); } else { *given = (11 * w.w_needed) / 10; } return (error); } /* * Definitions of protocols supported in the ROUTE domain. */ extern struct domain routedomain; /* or at least forward */ struct protosw routesw[] = { { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, raw_input, route_output, raw_ctlinput, 0, route_usrreq, raw_init, 0, 0, 0, sysctl_rtable, } }; struct domain routedomain = { PF_ROUTE, "route", route_init, 0, 0, routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };