Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. =================================================================== RCS file: /ftp/cvs/cvsroot/src/sys/netinet/ip_input.c,v rcsdiff: /ftp/cvs/cvsroot/src/sys/netinet/ip_input.c,v: warning: Unknown phrases like `commitid ...;' are present. retrieving revision 1.30.4.1 retrieving revision 1.73 diff -u -p -r1.30.4.1 -r1.73 --- src/sys/netinet/ip_input.c 1996/11/10 21:57:51 1.30.4.1 +++ src/sys/netinet/ip_input.c 1998/10/08 01:41:46 1.73 @@ -1,4 +1,4 @@ -/* $NetBSD: ip_input.c,v 1.30.4.1 1996/11/10 21:57:51 thorpej Exp $ */ +/* $NetBSD: ip_input.c,v 1.73 1998/10/08 01:41:46 thorpej Exp $ */ /* * Copyright (c) 1982, 1986, 1988, 1993 @@ -35,6 +35,47 @@ * @(#)ip_input.c 8.2 (Berkeley) 1/4/94 */ +/*- + * Copyright (c) 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Public Access Networks Corporation ("Panix"). It was developed under + * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. + * + * 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 NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +#include "opt_gateway.h" +#include "opt_pfil_hooks.h" +#include "opt_mrouting.h" + #include #include #include @@ -42,16 +83,20 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include +#include #include +#include #include #include @@ -72,8 +117,18 @@ #define IPSENDREDIRECTS 1 #endif #ifndef IPFORWSRCRT -#define IPFORWSRCRT 1 /* allow source-routed packets */ +#define IPFORWSRCRT 1 /* forward source-routed packets */ +#endif +#ifndef IPALLOWSRCRT +#define IPALLOWSRCRT 1 /* allow source-routed packets */ #endif +#ifndef IPMTUDISC +#define IPMTUDISC 0 +#endif +#ifndef IPMTUDISCTIMEOUT +#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */ +#endif + /* * Note: DIRECTED_BROADCAST is handled this way so that previous * configuration using this option will Just Work. @@ -90,16 +145,28 @@ int ipsendredirects = IPSENDREDIRECTS; int ip_defttl = IPDEFTTL; int ip_forwsrcrt = IPFORWSRCRT; int ip_directedbcast = IPDIRECTEDBCAST; +int ip_allowsrcrt = IPALLOWSRCRT; +int ip_mtudisc = IPMTUDISC; +u_int ip_mtudisc_timeout = IPMTUDISCTIMEOUT; #ifdef DIAGNOSTIC int ipprintfs = 0; #endif +struct rttimer_queue *ip_mtudisc_timeout_q = NULL; + extern struct domain inetdomain; extern struct protosw inetsw[]; u_char ip_protox[IPPROTO_MAX]; int ipqmaxlen = IFQ_MAXLEN; struct in_ifaddrhead in_ifaddr; +struct in_ifaddrhashhead *in_ifaddrhashtbl; struct ifqueue ipintrq; +struct ipstat ipstat; +u_int16_t ip_id; +int ip_defttl; +struct ipqhead ipq; + +struct pool ipqent_pool; /* * We need to save the IP options in case a protocol wants to respond @@ -117,6 +184,7 @@ static struct ip_srcrt { } ip_srcrt; static void save_rte __P((u_char *, struct in_addr)); + /* * IP initialization: fill in IP protocol switch table. * All protocols not implemented in kernel go to raw IP protocol handler. @@ -127,6 +195,9 @@ ip_init() register struct protosw *pr; register int i; + pool_init(&ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", + 0, NULL, NULL, M_IPQ); + pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); if (pr == 0) panic("ip_init"); @@ -141,6 +212,14 @@ ip_init() ip_id = time.tv_sec & 0xffff; ipintrq.ifq_maxlen = ipqmaxlen; TAILQ_INIT(&in_ifaddr); + in_ifaddrhashtbl = + hashinit(IN_IFADDR_HASH_SIZE, M_IFADDR, M_WAITOK, &in_ifaddrhash); + if (ip_mtudisc != 0) + ip_mtudisc_timeout_q = + rt_timer_queue_create(ip_mtudisc_timeout); +#ifdef GATEWAY + ipflow_init(); +#endif } struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; @@ -153,12 +232,18 @@ struct route ipforward_rt; void ipintr() { - register struct ip *ip; + register struct ip *ip = NULL; register struct mbuf *m; register struct ipq *fp; register struct in_ifaddr *ia; + register struct ifaddr *ifa; struct ipqent *ipqe; - int hlen, mff, s; + int hlen = 0, mff, len, s; +#ifdef PFIL_HOOKS + struct packet_filter_hook *pfh; + struct mbuf *m0; + int rv; +#endif /* PFIL_HOOKS */ next: /* @@ -212,12 +297,9 @@ next: * Convert fields to host representation. */ NTOHS(ip->ip_len); - if (ip->ip_len < hlen) { - ipstat.ips_badlen++; - goto bad; - } NTOHS(ip->ip_id); NTOHS(ip->ip_off); + len = ip->ip_len; /* * Check that the amount of data in the buffers @@ -225,19 +307,46 @@ next: * Trim mbufs if longer than we expect. * Drop packet if shorter than we expect. */ - if (m->m_pkthdr.len < ip->ip_len) { + if (m->m_pkthdr.len < len) { ipstat.ips_tooshort++; goto bad; } - if (m->m_pkthdr.len > ip->ip_len) { + if (m->m_pkthdr.len > len) { if (m->m_len == m->m_pkthdr.len) { - m->m_len = ip->ip_len; - m->m_pkthdr.len = ip->ip_len; + m->m_len = len; + m->m_pkthdr.len = len; } else - m_adj(m, ip->ip_len - m->m_pkthdr.len); + m_adj(m, len - m->m_pkthdr.len); } /* + * Assume that we can create a fast-forward IP flow entry + * based on this packet. + */ + m->m_flags |= M_CANFASTFWD; + +#ifdef PFIL_HOOKS + /* + * Run through list of hooks for input packets. If there are any + * filters which require that additional packets in the flow are + * not fast-forwarded, they must clear the M_CANFASTFWD flag. + * Note that filters must _never_ set this flag, as another filter + * in the list may have previously cleared it. + */ + m0 = m; + for (pfh = pfil_hook_get(PFIL_IN); pfh; pfh = pfh->pfil_link.tqe_next) + if (pfh->pfil_func) { + rv = pfh->pfil_func(ip, hlen, m->m_pkthdr.rcvif, 0, &m0); + if (rv) + goto next; + m = m0; + if (m == NULL) + goto next; + ip = mtod(m, struct ip *); + } +#endif /* PFIL_HOOKS */ + + /* * Process options and, if not destined for us, * ship it on. ip_dooptions returns 1 when an * error was detected (causing an icmp message @@ -250,14 +359,15 @@ next: /* * Check our list of addresses, to see if the packet is for us. */ - for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) { - if (ip->ip_dst.s_addr == ia->ia_addr.sin_addr.s_addr) - goto ours; - if (((ip_directedbcast == 0) || (ip_directedbcast && - ia->ia_ifp == m->m_pkthdr.rcvif)) && - (ia->ia_ifp->if_flags & IFF_BROADCAST)) { - if (ip->ip_dst.s_addr == ia->ia_broadaddr.sin_addr.s_addr || - ip->ip_dst.s_addr == ia->ia_netbroadcast.s_addr || + INADDR_TO_IA(ip->ip_dst, ia); + if (ia != NULL) goto ours; + if (m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { + for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first; + ifa != NULL; ifa = ifa->ifa_list.tqe_next) { + if (ifa->ifa_addr->sa_family != AF_INET) continue; + ia = ifatoia(ifa); + if (in_hosteq(ip->ip_dst, ia->ia_broadaddr.sin_addr) || + in_hosteq(ip->ip_dst, ia->ia_netbroadcast) || /* * Look for all-0's host part (old broadcast addr), * either for subnet or net. @@ -265,6 +375,12 @@ next: ip->ip_dst.s_addr == ia->ia_subnet || ip->ip_dst.s_addr == ia->ia_net) goto ours; + /* + * An interface with IP address zero accepts + * all packets that arrive on that interface. + */ + if (in_nullhost(ia->ia_addr.sin_addr)) + goto ours; } } if (IN_MULTICAST(ip->ip_dst.s_addr)) { @@ -324,7 +440,7 @@ next: goto ours; } if (ip->ip_dst.s_addr == INADDR_BROADCAST || - ip->ip_dst.s_addr == INADDR_ANY) + in_nullhost(ip->ip_dst)) goto ours; /* @@ -345,22 +461,15 @@ ours: * if the packet was previously fragmented, * but it's not worth the time; just let them time out.) */ - if (ip->ip_off &~ IP_DF) { - if (m->m_flags & M_EXT) { /* XXX */ - if ((m = m_pullup(m, sizeof (struct ip))) == 0) { - ipstat.ips_toosmall++; - goto next; - } - ip = mtod(m, struct ip *); - } + if (ip->ip_off & ~(IP_DF|IP_RF)) { /* * Look for queue of fragments * of this datagram. */ for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next) if (ip->ip_id == fp->ipq_id && - ip->ip_src.s_addr == fp->ipq_src.s_addr && - ip->ip_dst.s_addr == fp->ipq_dst.s_addr && + in_hosteq(ip->ip_src, fp->ipq_src) && + in_hosteq(ip->ip_dst, fp->ipq_dst) && ip->ip_p == fp->ipq_p) goto found; fp = 0; @@ -392,19 +501,19 @@ found: */ if (mff || ip->ip_off) { ipstat.ips_fragments++; - MALLOC(ipqe, struct ipqent *, sizeof (struct ipqent), - M_IPQ, M_NOWAIT); + ipqe = pool_get(&ipqent_pool, PR_NOWAIT); if (ipqe == NULL) { ipstat.ips_rcvmemdrop++; goto bad; } ipqe->ipqe_mff = mff; + ipqe->ipqe_m = m; ipqe->ipqe_ip = ip; - ip = ip_reass(ipqe, fp); - if (ip == 0) + m = ip_reass(ipqe, fp); + if (m == 0) goto next; ipstat.ips_reassembled++; - m = dtom(ip); + ip = mtod(m, struct ip *); } else if (fp) ip_freef(fp); @@ -428,12 +537,12 @@ bad: * reassembly of this datagram already exists, then it * is given as fp; otherwise have to make a chain. */ -struct ip * +struct mbuf * ip_reass(ipqe, fp) register struct ipqent *ipqe; register struct ipq *fp; { - register struct mbuf *m = dtom(ipqe->ipqe_ip); + register struct mbuf *m = ipqe->ipqe_m; register struct ipqent *nq, *p, *q; struct ip *ip; struct mbuf *t; @@ -451,9 +560,10 @@ ip_reass(ipqe, fp) * If first fragment to arrive, create a reassembly queue. */ if (fp == 0) { - if ((t = m_get(M_DONTWAIT, MT_FTABLE)) == NULL) + MALLOC(fp, struct ipq *, sizeof (struct ipq), + M_FTABLE, M_NOWAIT); + if (fp == NULL) goto dropfrag; - fp = mtod(t, struct ipq *); LIST_INSERT_HEAD(&ipq, fp, ipq_q); fp->ipq_ttl = IPFRAGTTL; fp->ipq_p = ipqe->ipqe_ip->ip_p; @@ -484,7 +594,7 @@ ip_reass(ipqe, fp) if (i > 0) { if (i >= ipqe->ipqe_ip->ip_len) goto dropfrag; - m_adj(dtom(ipqe->ipqe_ip), i); + m_adj(ipqe->ipqe_m, i); ipqe->ipqe_ip->ip_off += i; ipqe->ipqe_ip->ip_len -= i; } @@ -501,13 +611,13 @@ ip_reass(ipqe, fp) if (i < q->ipqe_ip->ip_len) { q->ipqe_ip->ip_len -= i; q->ipqe_ip->ip_off += i; - m_adj(dtom(q->ipqe_ip), i); + m_adj(q->ipqe_m, i); break; } nq = q->ipqe_q.le_next; - m_freem(dtom(q->ipqe_ip)); + m_freem(q->ipqe_m); LIST_REMOVE(q, ipqe_q); - FREE(q, M_IPQ); + pool_put(&ipqent_pool, q); } insert: @@ -541,16 +651,16 @@ insert: ip_freef(fp); return (0); } - m = dtom(q->ipqe_ip); + m = q->ipqe_m; t = m->m_next; m->m_next = 0; m_cat(m, t); nq = q->ipqe_q.le_next; - FREE(q, M_IPQ); + pool_put(&ipqent_pool, q); for (q = nq; q != NULL; q = nq) { - t = dtom(q->ipqe_ip); + t = q->ipqe_m; nq = q->ipqe_q.le_next; - FREE(q, M_IPQ); + pool_put(&ipqent_pool, q); m_cat(m, t); } @@ -564,22 +674,22 @@ insert: ip->ip_src = fp->ipq_src; ip->ip_dst = fp->ipq_dst; LIST_REMOVE(fp, ipq_q); - (void) m_free(dtom(fp)); + FREE(fp, M_FTABLE); m->m_len += (ip->ip_hl << 2); m->m_data -= (ip->ip_hl << 2); /* some debugging cruft by sklower, below, will go away soon */ if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */ register int plen = 0; - for (t = m; m; m = m->m_next) - plen += m->m_len; - t->m_pkthdr.len = plen; + for (t = m; t; t = t->m_next) + plen += t->m_len; + m->m_pkthdr.len = plen; } - return (ip); + return (m); dropfrag: ipstat.ips_fragdropped++; m_freem(m); - FREE(ipqe, M_IPQ); + pool_put(&ipqent_pool, ipqe); return (0); } @@ -595,12 +705,12 @@ ip_freef(fp) for (q = fp->ipq_fragq.lh_first; q != NULL; q = p) { p = q->ipqe_q.le_next; - m_freem(dtom(q->ipqe_ip)); + m_freem(q->ipqe_m); LIST_REMOVE(q, ipqe_q); - FREE(q, M_IPQ); + pool_put(&ipqent_pool, q); } LIST_REMOVE(fp, ipq_q); - (void) m_free(dtom(fp)); + FREE(fp, M_FTABLE); } /* @@ -621,6 +731,9 @@ ip_slowtimo() ip_freef(fp); } } +#ifdef GATEWAY + ipflow_slowtimo(); +#endif splx(s); } @@ -688,6 +801,11 @@ ip_dooptions(m) */ case IPOPT_LSRR: case IPOPT_SSRR: + if (ip_allowsrcrt == 0) { + type = ICMP_UNREACH; + code = ICMP_UNREACH_NET_PROHIB; + goto bad; + } if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { code = &cp[IPOPT_OFFSET] - (u_char *)ip; goto bad; @@ -785,7 +903,7 @@ ip_dooptions(m) break; case IPOPT_TS_TSANDADDR: - if (ipt->ipt_ptr + sizeof(n_time) + + if (ipt->ipt_ptr - 1 + sizeof(n_time) + sizeof(struct in_addr) > ipt->ipt_len) goto bad; ipaddr.sin_addr = dst; @@ -799,7 +917,7 @@ ip_dooptions(m) break; case IPOPT_TS_PRESPEC: - if (ipt->ipt_ptr + sizeof(n_time) + + if (ipt->ipt_ptr - 1 + sizeof(n_time) + sizeof(struct in_addr) > ipt->ipt_len) goto bad; bcopy((caddr_t)sin, (caddr_t)&ipaddr.sin_addr, @@ -847,7 +965,7 @@ ip_rtaddr(dst) sin = satosin(&ipforward_rt.ro_dst); - if (ipforward_rt.ro_rt == 0 || dst.s_addr != sin->sin_addr.s_addr) { + if (ipforward_rt.ro_rt == 0 || !in_hosteq(dst, sin->sin_addr)) { if (ipforward_rt.ro_rt) { RTFREE(ipforward_rt.ro_rt); ipforward_rt.ro_rt = 0; @@ -1021,8 +1139,9 @@ ip_forward(m, srcrt) dest = 0; #ifdef DIAGNOSTIC if (ipprintfs) - printf("forward: src %x dst %x ttl %x\n", - ip->ip_src.s_addr, ip->ip_dst.s_addr, ip->ip_ttl); + printf("forward: src %2.2x dst %2.2x ttl %x\n", + ntohl(ip->ip_src.s_addr), + ntohl(ip->ip_dst.s_addr), ip->ip_ttl); #endif if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { ipstat.ips_cantforward++; @@ -1038,13 +1157,13 @@ ip_forward(m, srcrt) sin = satosin(&ipforward_rt.ro_dst); if ((rt = ipforward_rt.ro_rt) == 0 || - ip->ip_dst.s_addr != sin->sin_addr.s_addr) { + !in_hosteq(ip->ip_dst, sin->sin_addr)) { if (ipforward_rt.ro_rt) { RTFREE(ipforward_rt.ro_rt); ipforward_rt.ro_rt = 0; } sin->sin_family = AF_INET; - sin->sin_len = sizeof(*sin); + sin->sin_len = sizeof(struct sockaddr_in); sin->sin_addr = ip->ip_dst; rtalloc(&ipforward_rt); @@ -1056,10 +1175,10 @@ ip_forward(m, srcrt) } /* - * Save at most 64 bytes of the packet in case + * Save at most 68 bytes of the packet in case * we need to generate an ICMP message to the src. */ - mcopy = m_copy(m, 0, imin((int)ip->ip_len, 64)); + mcopy = m_copy(m, 0, imin((int)ip->ip_len, 68)); /* * If forwarding packet using same interface that it came in on, @@ -1071,7 +1190,7 @@ ip_forward(m, srcrt) */ if (rt->rt_ifp == m->m_pkthdr.rcvif && (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 && - satosin(rt_key(rt))->sin_addr.s_addr != 0 && + !in_nullhost(satosin(rt_key(rt))->sin_addr) && ipsendredirects && !srcrt) { if (rt->rt_ifa && (ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == @@ -1085,7 +1204,7 @@ ip_forward(m, srcrt) code = ICMP_REDIRECT_HOST; #ifdef DIAGNOSTIC if (ipprintfs) - printf("redirect (%d) to %x\n", code, (u_int32_t)dest); + printf("redirect (%d) to %x\n", code, (u_int32_t)dest); #endif } } @@ -1099,8 +1218,13 @@ ip_forward(m, srcrt) if (type) ipstat.ips_redirectsent++; else { - if (mcopy) + if (mcopy) { +#ifdef GATEWAY + if (mcopy->m_flags & M_CANFASTFWD) + ipflow_create(&ipforward_rt, mcopy); +#endif m_freem(mcopy); + } return; } } @@ -1139,6 +1263,66 @@ ip_forward(m, srcrt) icmp_error(mcopy, type, code, dest, destifp); } +void +ip_savecontrol(inp, mp, ip, m) + register struct inpcb *inp; + register struct mbuf **mp; + register struct ip *ip; + register struct mbuf *m; +{ + + if (inp->inp_socket->so_options & SO_TIMESTAMP) { + struct timeval tv; + + microtime(&tv); + *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), + SCM_TIMESTAMP, SOL_SOCKET); + if (*mp) + mp = &(*mp)->m_next; + } + if (inp->inp_flags & INP_RECVDSTADDR) { + *mp = sbcreatecontrol((caddr_t) &ip->ip_dst, + sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); + if (*mp) + mp = &(*mp)->m_next; + } +#ifdef notyet + /* + * XXX + * Moving these out of udp_input() made them even more broken + * than they already were. + * - fenner@parc.xerox.com + */ + /* options were tossed already */ + if (inp->inp_flags & INP_RECVOPTS) { + *mp = sbcreatecontrol((caddr_t) opts_deleted_above, + sizeof(struct in_addr), IP_RECVOPTS, IPPROTO_IP); + if (*mp) + mp = &(*mp)->m_next; + } + /* ip_srcroute doesn't do what we want here, need to fix */ + if (inp->inp_flags & INP_RECVRETOPTS) { + *mp = sbcreatecontrol((caddr_t) ip_srcroute(), + sizeof(struct in_addr), IP_RECVRETOPTS, IPPROTO_IP); + if (*mp) + mp = &(*mp)->m_next; + } +#endif + if (inp->inp_flags & INP_RECVIF) { + struct sockaddr_dl sdl; + + sdl.sdl_len = offsetof(struct sockaddr_dl, sdl_data[0]); + sdl.sdl_family = AF_LINK; + sdl.sdl_index = m->m_pkthdr.rcvif ? + m->m_pkthdr.rcvif->if_index : 0; + sdl.sdl_nlen = sdl.sdl_alen = sdl.sdl_slen = 0; + *mp = sbcreatecontrol((caddr_t) &sdl, sdl.sdl_len, + IP_RECVIF, IPPROTO_IP); + if (*mp) + mp = &(*mp)->m_next; + } +} + int ip_sysctl(name, namelen, oldp, oldlenp, newp, newlen) int *name; @@ -1148,6 +1332,10 @@ ip_sysctl(name, namelen, oldp, oldlenp, void *newp; size_t newlen; { + extern int subnetsarelocal; + + int error, old; + /* All sysctl names at this level are terminal. */ if (namelen != 1) return (ENOTDIR); @@ -1165,16 +1353,77 @@ ip_sysctl(name, namelen, oldp, oldlenp, return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu)); #endif case IPCTL_FORWSRCRT: - /* - * Don't allow this to change in a secure environment. - */ + /* Don't allow this to change in a secure environment. */ if (securelevel > 0) - return (EPERM); - return (sysctl_int(oldp, oldlenp, newp, newlen, - &ip_forwsrcrt)); + return (sysctl_rdint(oldp, oldlenp, newp, + ip_forwsrcrt)); + else + return (sysctl_int(oldp, oldlenp, newp, newlen, + &ip_forwsrcrt)); case IPCTL_DIRECTEDBCAST: return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_directedbcast)); + case IPCTL_ALLOWSRCRT: + return (sysctl_int(oldp, oldlenp, newp, newlen, + &ip_allowsrcrt)); + case IPCTL_SUBNETSARELOCAL: + return (sysctl_int(oldp, oldlenp, newp, newlen, + &subnetsarelocal)); + case IPCTL_MTUDISC: + error = sysctl_int(oldp, oldlenp, newp, newlen, + &ip_mtudisc); + if (ip_mtudisc != 0 && ip_mtudisc_timeout_q == NULL) { + ip_mtudisc_timeout_q = + rt_timer_queue_create(ip_mtudisc_timeout); + } else if (ip_mtudisc == 0 && ip_mtudisc_timeout_q != NULL) { + rt_timer_queue_destroy(ip_mtudisc_timeout_q, TRUE); + ip_mtudisc_timeout_q = NULL; + } + return error; + case IPCTL_ANONPORTMIN: + old = anonportmin; + error = sysctl_int(oldp, oldlenp, newp, newlen, &anonportmin); + if (anonportmin >= anonportmax || anonportmin > 65535 +#ifndef IPNOPRIVPORTS + || anonportmin < IPPORT_RESERVED +#endif + ) { + anonportmin = old; + return (EINVAL); + } + return (error); + case IPCTL_ANONPORTMAX: + old = anonportmax; + error = sysctl_int(oldp, oldlenp, newp, newlen, &anonportmax); + if (anonportmin >= anonportmax || anonportmax > 65535 +#ifndef IPNOPRIVPORTS + || anonportmax < IPPORT_RESERVED +#endif + ) { + anonportmax = old; + return (EINVAL); + } + return (error); + case IPCTL_MTUDISCTIMEOUT: + error = sysctl_int(oldp, oldlenp, newp, newlen, + &ip_mtudisc_timeout); + if (ip_mtudisc_timeout_q != NULL) + rt_timer_queue_change(ip_mtudisc_timeout_q, + ip_mtudisc_timeout); + return (error); +#ifdef GATEWAY + case IPCTL_MAXFLOWS: + { + int s; + + error = sysctl_int(oldp, oldlenp, newp, newlen, + &ip_maxflows); + s = splsoftnet(); + ipflow_reap(0); + splx(s); + return (error); + } +#endif default: return (EOPNOTSUPP); }