--- /dev/null
+/*
+ * Copyright (c) 1982, 1986, 1988, 1990, 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.
+ *
+ * @(#)ip_output.c 8.3 (Berkeley) 1/21/94
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/errno.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/queue.h>
+
+#include <net/if.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/in_pcb.h>
+#include <netinet/in_var.h>
+#include <netinet/ip_var.h>
+
+#include <netinet/ip_fw.h>
+
+#ifdef vax
+#include <machine/mtpr.h>
+#endif
+#include <oskittcp.h>
+
+u_short ip_id;
+
+static struct mbuf *ip_insertoptions __P((struct mbuf *, struct mbuf *, int *));
+#ifndef __REACTOS__
+static void ip_mloopback
+ __P((struct ifnet *, struct mbuf *, struct sockaddr_in *));
+#endif
+
+/*
+ * IP output. The packet in mbuf chain m contains a skeletal IP
+ * header (with len, off, ttl, proto, tos, src, dst).
+ * The mbuf chain containing the packet will be freed.
+ * The mbuf opt, if present, will not be freed.
+ */
+int
+ip_output(m0, opt, ro, flags, imo)
+ struct mbuf *m0;
+ struct mbuf *opt;
+ struct route *ro;
+ int flags;
+ struct ip_moptions *imo;
+{
+ register struct ip *ip, *mhip;
+#ifndef __REACTOS__
+ register struct ifnet *ifp;
+#endif
+ register struct mbuf *m = m0;
+ register int hlen = sizeof (struct ip);
+ int len, off, error = 0;
+ /*
+ * It might seem obvious at first glance that one could easily
+ * make a one-behind cache out of this by simply making `iproute'
+ * static and eliminating the bzero() below. However, this turns
+ * out not to work, for two reasons:
+ *
+ * 1) This routine needs to be reentrant. It can be called
+ * recursively from encapsulating network interfaces, and it
+ * is always called recursively from ip_mforward().
+ *
+ * 2) You turn out not to gain much. There is already a one-
+ * behind cache implemented for the specific case of forwarding,
+ * and sends on a connected socket will use a route associated
+ * with the PCB. The only cases left are sends on unconnected
+ * and raw sockets, and if these cases are really significant,
+ * something is seriously wrong.
+ */
+ struct route iproute;
+ struct sockaddr_in *dst;
+ struct in_ifaddr *ia;
+
+#ifdef DIAGNOSTIC
+ if ((m->m_flags & M_PKTHDR) == 0)
+ panic("ip_output no HDR");
+#endif
+ if (opt) {
+ m = ip_insertoptions(m, opt, &len);
+ hlen = len;
+ }
+ ip = mtod(m, struct ip *);
+ /*
+ * Fill in IP header.
+ */
+ if ((flags & (IP_FORWARDING|IP_RAWOUTPUT)) == 0) {
+ ip->ip_v = IPVERSION;
+ ip->ip_off &= IP_DF;
+ ip->ip_id = htons(ip_id++);
+ ip->ip_hl = hlen >> 2;
+ ipstat.ips_localout++;
+ } else {
+ hlen = ip->ip_hl << 2;
+ }
+ /*
+ * Route packet.
+ */
+ if (ro == 0) {
+ ro = &iproute;
+ bzero((caddr_t)ro, sizeof (*ro));
+ }
+ dst = (struct sockaddr_in *)&ro->ro_dst;
+ /*
+ * If there is a cached route,
+ * check that it is to the same destination
+ * and is still up. If not, free it and try again.
+ */
+ if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
+ dst->sin_addr.s_addr != ip->ip_dst.s_addr)) {
+ RTFREE(ro->ro_rt);
+ ro->ro_rt = (struct rtentry *)0;
+ }
+ if (ro->ro_rt == 0) {
+ dst->sin_family = AF_INET;
+ dst->sin_len = sizeof(*dst);
+ dst->sin_addr = ip->ip_dst;
+ }
+ /*
+ * If routing to interface only,
+ * short circuit routing lookup.
+ */
+#define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
+#define sintosa(sin) ((struct sockaddr *)(sin))
+ if (flags & IP_ROUTETOIF) {
+ if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0 &&
+ (ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
+ ipstat.ips_noroute++;
+ error = ENETUNREACH;
+ goto bad;
+ }
+#ifndef __REACTOS__
+ ifp = ia->ia_ifp;
+#endif
+ ip->ip_ttl = 1;
+ } else {
+ /*
+ * If this is the case, we probably don't want to allocate
+ * a protocol-cloned route since we didn't get one from the
+ * ULP. This lets TCP do its thing, while not burdening
+ * forwarding or ICMP with the overhead of cloning a route.
+ * Of course, we still want to do any cloning requested by
+ * the link layer, as this is probably required in all cases
+ * for correct operation (as it is for ARP).
+ */
+#ifndef __REACTOS__
+ if (ro->ro_rt == 0)
+ rtalloc_ign(ro, RTF_PRCLONING);
+ if (ro->ro_rt == 0) {
+ ipstat.ips_noroute++;
+ OS_DbgPrint(OSK_MID_TRACE,("EHOSTUNREACH\n"));
+ error = EHOSTUNREACH;
+ goto bad;
+ }
+ ia = ifatoia(ro->ro_rt->rt_ifa);
+ ifp = ro->ro_rt->rt_ifp;
+ ro->ro_rt->rt_use++;
+ if (ro->ro_rt->rt_flags & RTF_GATEWAY)
+ dst = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
+#endif
+ }
+#ifndef __REACTOS__
+ if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
+ struct in_multi *inm;
+
+ m->m_flags |= M_MCAST;
+ /*
+ * IP destination address is multicast. Make sure "dst"
+ * still points to the address in "ro". (It may have been
+ * changed to point to a gateway address, above.)
+ */
+ dst = (struct sockaddr_in *)&ro->ro_dst;
+ /*
+ * See if the caller provided any multicast options
+ */
+ if (imo != NULL) {
+ ip->ip_ttl = imo->imo_multicast_ttl;
+ if (imo->imo_multicast_ifp != NULL)
+ ifp = imo->imo_multicast_ifp;
+ if (imo->imo_multicast_vif != -1)
+ ip->ip_src.s_addr =
+ ip_mcast_src(imo->imo_multicast_vif);
+ } else
+ ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
+ /*
+ * Confirm that the outgoing interface supports multicast.
+ */
+ if ((imo == NULL) || (imo->imo_multicast_vif == -1)) {
+ if ((ifp->if_flags & IFF_MULTICAST) == 0) {
+ ipstat.ips_noroute++;
+ error = ENETUNREACH;
+ goto bad;
+ }
+ }
+ /*
+ * If source address not specified yet, use address
+ * of outgoing interface.
+ */
+ if (ip->ip_src.s_addr == INADDR_ANY) {
+ register struct in_ifaddr *ia;
+
+ panic("We don't handle this yet\n");
+ for (ia = in_ifaddr; ia; ia = ia->ia_next)
+ if (ia->ia_ifp == ifp) {
+ ip->ip_src = IA_SIN(ia)->sin_addr;
+ break;
+ }
+ }
+
+ IN_LOOKUP_MULTI(ip->ip_dst, ifp, inm);
+ if (inm != NULL &&
+ (imo == NULL || imo->imo_multicast_loop)) {
+ /*
+ * If we belong to the destination multicast group
+ * on the outgoing interface, and the caller did not
+ * forbid loopback, loop back a copy.
+ */
+ ip_mloopback(ifp, m, dst);
+ }
+ else {
+ /*
+ * If we are acting as a multicast router, perform
+ * multicast forwarding as if the packet had just
+ * arrived on the interface to which we are about
+ * to send. The multicast forwarding function
+ * recursively calls this function, using the
+ * IP_FORWARDING flag to prevent infinite recursion.
+ *
+ * Multicasts that are looped back by ip_mloopback(),
+ * above, will be forwarded by the ip_input() routine,
+ * if necessary.
+ */
+ if (ip_mrouter && (flags & IP_FORWARDING) == 0) {
+ /*
+ * Check if rsvp daemon is running. If not, don't
+ * set ip_moptions. This ensures that the packet
+ * is multicast and not just sent down one link
+ * as prescribed by rsvpd.
+ */
+ if (!rsvp_on)
+ imo = NULL;
+ if (ip_mforward(ip, ifp, m, imo) != 0) {
+ m_freem(m);
+ goto done;
+ }
+ }
+ }
+
+ /*
+ * Multicasts with a time-to-live of zero may be looped-
+ * back, above, but must not be transmitted on a network.
+ * Also, multicasts addressed to the loopback interface
+ * are not sent -- the above call to ip_mloopback() will
+ * loop back a copy if this host actually belongs to the
+ * destination group on the loopback interface.
+ */
+ if (ip->ip_ttl == 0 || ifp->if_flags & IFF_LOOPBACK) {
+ m_freem(m);
+ goto done;
+ }
+
+ goto sendit;
+ }
+#endif
+
+#ifndef notdef
+ /*
+ * If source address not specified yet, use address
+ * of outgoing interface.
+ */
+ if (ip->ip_src.s_addr == INADDR_ANY)
+ ip->ip_src = IA_SIN(ia)->sin_addr;
+#endif
+#ifndef __REACTOS__
+ /*
+ * Verify that we have any chance at all of being able to queue
+ * the packet or packet fragments
+ */
+ if ((ifp->if_snd.ifq_len + ip->ip_len / ifp->if_mtu + 1) >=
+ ifp->if_snd.ifq_maxlen) {
+ error = ENOBUFS;
+ goto bad;
+ }
+
+ /*
+ * Look for broadcast address and
+ * and verify user is allowed to send
+ * such a packet.
+ */
+ if (in_broadcast(dst->sin_addr, ifp)) {
+ if ((ifp->if_flags & IFF_BROADCAST) == 0) {
+ error = EADDRNOTAVAIL;
+ goto bad;
+ }
+ if ((flags & IP_ALLOWBROADCAST) == 0) {
+ error = EACCES;
+ goto bad;
+ }
+ /* don't allow broadcast messages to be fragmented */
+ if ((u_short)ip->ip_len > ifp->if_mtu) {
+ error = EMSGSIZE;
+ goto bad;
+ }
+ m->m_flags |= M_BCAST;
+ } else
+ m->m_flags &= ~M_BCAST;
+#endif
+
+#ifndef __REACTOS__
+sendit:
+ /*
+ * Check with the firewall...
+ */
+ if (!(*ip_fw_chk_ptr)(m,ip,ifp,1)) {
+ error = EACCES;
+ goto done;
+ }
+#endif
+
+ /*
+ * If small enough for interface, can just send directly.
+ */
+ if ((u_short)ip->ip_len <= 1400 /* XXX Get MTU from Interface */) {
+ ip->ip_len = htons((u_short)ip->ip_len);
+ ip->ip_off = htons((u_short)ip->ip_off);
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(m, hlen);
+#ifdef __REACTOS__
+ if( OtcpEvent.PacketSend ) {
+ struct mbuf *new_m;
+ new_m = m_get( M_DONTWAIT, 0 );
+ if ( NULL == new_m ) {
+ error = ENOBUFS;
+ goto done;
+ }
+ MCLGET( new_m, M_DONTWAIT );
+ if (0 == (new_m->m_flags & M_EXT)) {
+ m_free( new_m );
+ error = ENOBUFS;
+ goto done;
+ }
+ m_copydata( m, 0, htons(ip->ip_len), new_m->m_data );
+ new_m->m_len = htons(ip->ip_len);
+ error = OtcpEvent.PacketSend( OtcpEvent.ClientData,
+ new_m->m_data, new_m->m_len );
+ m_free( new_m );
+ goto done;
+ }
+#else
+ error = (*ifp->if_output)(ifp, m,
+ (struct sockaddr *)dst, ro->ro_rt);
+#endif
+ }
+ /*
+ * Too large for interface; fragment if possible.
+ * Must be able to put at least 8 bytes per fragment.
+ */
+ if (ip->ip_off & IP_DF) {
+ error = EMSGSIZE;
+#ifndef __REACTOS__
+#if 1
+ /*
+ * This case can happen if the user changed the MTU
+ * of an interface after enabling IP on it. Because
+ * most netifs don't keep track of routes pointing to
+ * them, there is no way for one to update all its
+ * routes when the MTU is changed.
+ */
+ if ((ro->ro_rt->rt_flags & (RTF_UP | RTF_HOST))
+ && !(ro->ro_rt->rt_rmx.rmx_locks & RTV_MTU)
+ && (ro->ro_rt->rt_rmx.rmx_mtu > ifp->if_mtu)) {
+ ro->ro_rt->rt_rmx.rmx_mtu = ifp->if_mtu;
+ }
+#endif
+#endif
+ ipstat.ips_cantfrag++;
+ goto bad;
+ }
+#ifndef __REACTOS__
+ len = (ifp->if_mtu - hlen) &~ 7;
+ if (len < 8) {
+ error = EMSGSIZE;
+ goto bad;
+ }
+#else
+ OS_DbgPrint(OSK_MID_TRACE,("Using default mtu of 1500\n"));
+ len = (1500 - hlen) & ~7;
+#endif
+
+ {
+ int mhlen, firstlen = len;
+ struct mbuf **mnext = &m->m_nextpkt;
+
+ /*
+ * Loop through length of segment after first fragment,
+ * make new header and copy data of each part and link onto chain.
+ */
+ m0 = m;
+ mhlen = sizeof (struct ip);
+ for (off = hlen + len; off < (u_short)ip->ip_len; off += len) {
+ OS_DbgPrint(OSK_MID_TRACE,("off = %d, len = %d\n", off, len));
+ MGETHDR(m, M_DONTWAIT, MT_HEADER);
+ if (m == 0) {
+ error = ENOBUFS;
+ ipstat.ips_odropped++;
+ goto sendorfree;
+ }
+ m->m_data += max_linkhdr;
+ mhip = mtod(m, struct ip *);
+ *mhip = *ip;
+ if (hlen > sizeof (struct ip)) {
+ mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip);
+ mhip->ip_hl = mhlen >> 2;
+ }
+ m->m_len = mhlen;
+ mhip->ip_off = ((off - hlen) >> 3) + (ip->ip_off & ~IP_MF);
+ if (ip->ip_off & IP_MF)
+ mhip->ip_off |= IP_MF;
+ if (off + len >= (u_short)ip->ip_len)
+ len = (u_short)ip->ip_len - off;
+ else
+ mhip->ip_off |= IP_MF;
+ mhip->ip_len = htons((u_short)(len + mhlen));
+ m->m_next = m_copy(m0, off, len);
+ if (m->m_next == 0) {
+ (void) m_free(m);
+ error = ENOBUFS; /* ??? */
+ ipstat.ips_odropped++;
+ goto sendorfree;
+ }
+ m->m_pkthdr.len = mhlen + len;
+ m->m_pkthdr.rcvif = (struct ifnet *)0;
+ mhip->ip_off = htons((u_short)mhip->ip_off);
+ mhip->ip_sum = 0;
+ mhip->ip_sum = in_cksum(m, mhlen);
+ *mnext = m;
+ mnext = &m->m_nextpkt;
+ ipstat.ips_ofragments++;
+ }
+ /*
+ * Update first fragment by trimming what's been copied out
+ * and updating header, then send each fragment (in order).
+ */
+ m = m0;
+ OS_DbgPrint(OSK_MID_TRACE,("hlen %d firstlen %d ip->ip_len %x\n",
+ hlen, firstlen, ip->ip_len));
+ OS_DbgPrint(OSK_MID_TRACE,("hlen + firstlen - ip->ip_len %d\n",
+ hlen + firstlen - (u_short)ip->ip_len));
+ m_adj(m, hlen + firstlen - (u_short)ip->ip_len);
+ m->m_pkthdr.len = hlen + firstlen;
+ ip->ip_len = htons((u_short)(m->m_pkthdr.len));
+ ip->ip_off = htons((u_short)(ip->ip_off | IP_MF));
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(m, hlen - sizeof( struct ip ) );
+
+ OS_DbgPrint(OSK_MID_TRACE,("ip->ip_len = %x\n", ip->ip_len));
+
+sendorfree:
+ for (m = m0; m; m = m0) {
+ m0 = m->m_nextpkt;
+ m->m_nextpkt = 0;
+#ifndef __REACTOS__
+ if (error == 0)
+ error = (*ifp->if_output)(ifp, m,
+ (struct sockaddr *)dst, ro->ro_rt);
+ else
+ m_freem(m);
+#else
+ if( error == 0 && OtcpEvent.PacketSend ) {
+ struct mbuf *new_m;
+ MGET( new_m, M_DONTWAIT, 0 );
+ if ( NULL == new_m ) {
+ error = ENOBUFS;
+ goto done;
+ }
+ MCLGET( new_m, M_DONTWAIT );
+ if (0 == (new_m->m_flags & M_EXT)) {
+ m_free( new_m );
+ error = ENOBUFS;
+ goto done;
+ }
+ m_copydata( m, 0, htons(ip->ip_len), new_m->m_data );
+ new_m->m_len = htons(ip->ip_len);
+ error = OtcpEvent.PacketSend( OtcpEvent.ClientData,
+ new_m->m_data, new_m->m_len );
+ m_free( new_m );
+ goto done;
+ }
+
+ OS_DbgPrint(OSK_MID_TRACE,("Error from upper layer: %d\n", error));
+#endif
+ }
+
+ if (error == 0)
+ ipstat.ips_fragmented++;
+ }
+done:
+ if (ro == &iproute && (flags & IP_ROUTETOIF) == 0 && ro->ro_rt) {
+ RTFREE(ro->ro_rt);
+ }
+
+ return (error);
+bad:
+ m_freem(m0);
+ goto done;
+}
+
+/*
+ * Insert IP options into preformed packet.
+ * Adjust IP destination as required for IP source routing,
+ * as indicated by a non-zero in_addr at the start of the options.
+ *
+ * XXX This routine assumes that the packet has no options in place.
+ */
+static struct mbuf *
+ip_insertoptions(m, opt, phlen)
+ register struct mbuf *m;
+ struct mbuf *opt;
+ int *phlen;
+{
+ register struct ipoption *p = mtod(opt, struct ipoption *);
+ struct mbuf *n;
+ register struct ip *ip = mtod(m, struct ip *);
+ unsigned optlen;
+
+ optlen = opt->m_len - sizeof(p->ipopt_dst);
+ if (optlen + (u_short)ip->ip_len > IP_MAXPACKET)
+ return (m); /* XXX should fail */
+ if (p->ipopt_dst.s_addr)
+ ip->ip_dst = p->ipopt_dst;
+ if (m->m_flags & M_EXT || m->m_data - optlen < m->m_pktdat) {
+ MGETHDR(n, M_DONTWAIT, MT_HEADER);
+ if (n == 0)
+ return (m);
+ n->m_pkthdr.len = m->m_pkthdr.len + optlen;
+ m->m_len -= sizeof(struct ip);
+ m->m_data += sizeof(struct ip);
+ n->m_next = m;
+ m = n;
+ m->m_len = optlen + sizeof(struct ip);
+ m->m_data += max_linkhdr;
+ (void)memcpy(mtod(m, void *), ip, sizeof(struct ip));
+ } else {
+ m->m_data -= optlen;
+ m->m_len += optlen;
+ m->m_pkthdr.len += optlen;
+ ovbcopy((caddr_t)ip, mtod(m, caddr_t), sizeof(struct ip));
+ }
+ ip = mtod(m, struct ip *);
+ (void)memcpy(ip + 1, p->ipopt_list, (unsigned)optlen);
+ *phlen = sizeof(struct ip) + optlen;
+ ip->ip_hl = *phlen >> 2;
+ ip->ip_len += optlen;
+ return (m);
+}
+
+/*
+ * Copy options from ip to jp,
+ * omitting those not copied during fragmentation.
+ */
+int
+ip_optcopy(ip, jp)
+ struct ip *ip, *jp;
+{
+ register u_char *cp, *dp;
+ int opt, optlen, cnt;
+
+ cp = (u_char *)(ip + 1);
+ dp = (u_char *)(jp + 1);
+ cnt = (ip->ip_hl << 2) - sizeof (struct ip);
+ for (; cnt > 0; cnt -= optlen, cp += optlen) {
+ opt = cp[0];
+ if (opt == IPOPT_EOL)
+ break;
+ if (opt == IPOPT_NOP) {
+ /* Preserve for IP mcast tunnel's LSRR alignment. */
+ *dp++ = IPOPT_NOP;
+ optlen = 1;
+ continue;
+ } else
+ optlen = cp[IPOPT_OLEN];
+ /* bogus lengths should have been caught by ip_dooptions */
+ if (optlen > cnt)
+ optlen = cnt;
+ if (IPOPT_COPIED(opt)) {
+ (void)memcpy(dp, cp, (unsigned)optlen);
+ dp += optlen;
+ }
+ }
+ for (optlen = dp - (u_char *)(jp+1); optlen & 0x3; optlen++)
+ *dp++ = IPOPT_EOL;
+ return (optlen);
+}
+
+/*
+ * IP socket option processing.
+ */
+int
+ip_ctloutput(op, so, level, optname, mp)
+ int op;
+ struct socket *so;
+ int level, optname;
+ struct mbuf **mp;
+{
+ register struct inpcb *inp = sotoinpcb(so);
+ register struct mbuf *m = *mp;
+ register int optval = 0;
+ int error = 0;
+
+ if (level != IPPROTO_IP) {
+ error = EINVAL;
+ if (op == PRCO_SETOPT && *mp)
+ (void) m_free(*mp);
+ } else switch (op) {
+
+ case PRCO_SETOPT:
+ switch (optname) {
+ case IP_OPTIONS:
+#ifdef notyet
+ case IP_RETOPTS:
+ return (ip_pcbopts(optname, &inp->inp_options, m));
+#else
+ return (ip_pcbopts(&inp->inp_options, m));
+#endif
+
+ case IP_TOS:
+ case IP_TTL:
+ case IP_RECVOPTS:
+ case IP_RECVRETOPTS:
+ case IP_RECVDSTADDR:
+ if (m == 0 || m->m_len != sizeof(int))
+ error = EINVAL;
+ else {
+ optval = *mtod(m, int *);
+ switch (optname) {
+
+ case IP_TOS:
+ inp->inp_ip.ip_tos = optval;
+ break;
+
+ case IP_TTL:
+ inp->inp_ip.ip_ttl = optval;
+ break;
+#define OPTSET(bit) \
+ if (optval) \
+ inp->inp_flags |= bit; \
+ else \
+ inp->inp_flags &= ~bit;
+
+ case IP_RECVOPTS:
+ OPTSET(INP_RECVOPTS);
+ break;
+
+ case IP_RECVRETOPTS:
+ OPTSET(INP_RECVRETOPTS);
+ break;
+
+ case IP_RECVDSTADDR:
+ OPTSET(INP_RECVDSTADDR);
+ break;
+ }
+ }
+ break;
+#undef OPTSET
+
+ case IP_MULTICAST_IF:
+ case IP_MULTICAST_VIF:
+ case IP_MULTICAST_TTL:
+ case IP_MULTICAST_LOOP:
+ case IP_ADD_MEMBERSHIP:
+ case IP_DROP_MEMBERSHIP:
+ error = ip_setmoptions(optname, &inp->inp_moptions, m);
+ break;
+
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+ if (m)
+ (void)m_free(m);
+ break;
+
+ case PRCO_GETOPT:
+ switch (optname) {
+ case IP_OPTIONS:
+ case IP_RETOPTS:
+ *mp = m = m_get(M_WAIT, MT_SOOPTS);
+ if (inp->inp_options) {
+ m->m_len = inp->inp_options->m_len;
+ (void)memcpy(mtod(m, void *),
+ mtod(inp->inp_options, void *), (unsigned)m->m_len);
+ } else
+ m->m_len = 0;
+ break;
+
+ case IP_TOS:
+ case IP_TTL:
+ case IP_RECVOPTS:
+ case IP_RECVRETOPTS:
+ case IP_RECVDSTADDR:
+ *mp = m = m_get(M_WAIT, MT_SOOPTS);
+ m->m_len = sizeof(int);
+ switch (optname) {
+
+ case IP_TOS:
+ optval = inp->inp_ip.ip_tos;
+ break;
+
+ case IP_TTL:
+ optval = inp->inp_ip.ip_ttl;
+ break;
+
+#define OPTBIT(bit) (inp->inp_flags & bit ? 1 : 0)
+
+ case IP_RECVOPTS:
+ optval = OPTBIT(INP_RECVOPTS);
+ break;
+
+ case IP_RECVRETOPTS:
+ optval = OPTBIT(INP_RECVRETOPTS);
+ break;
+
+ case IP_RECVDSTADDR:
+ optval = OPTBIT(INP_RECVDSTADDR);
+ break;
+ }
+ *mtod(m, int *) = optval;
+ break;
+
+ case IP_MULTICAST_IF:
+ case IP_MULTICAST_VIF:
+ case IP_MULTICAST_TTL:
+ case IP_MULTICAST_LOOP:
+ case IP_ADD_MEMBERSHIP:
+ case IP_DROP_MEMBERSHIP:
+ error = ip_getmoptions(optname, inp->inp_moptions, mp);
+ break;
+
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+ break;
+ }
+ return (error);
+}
+
+/*
+ * Set up IP options in pcb for insertion in output packets.
+ * Store in mbuf with pointer in pcbopt, adding pseudo-option
+ * with destination address if source routed.
+ */
+int
+#ifdef notyet
+ip_pcbopts(optname, pcbopt, m)
+ int optname;
+#else
+ip_pcbopts(pcbopt, m)
+#endif
+ struct mbuf **pcbopt;
+ register struct mbuf *m;
+{
+ register int cnt, optlen;
+ register u_char *cp;
+ u_char opt;
+
+ /* turn off any old options */
+ if (*pcbopt)
+ (void)m_free(*pcbopt);
+ *pcbopt = 0;
+ if (m == (struct mbuf *)0 || m->m_len == 0) {
+ /*
+ * Only turning off any previous options.
+ */
+ if (m)
+ (void)m_free(m);
+ return (0);
+ }
+
+#ifndef vax
+ if (m->m_len % sizeof(long))
+ goto bad;
+#endif
+ /*
+ * IP first-hop destination address will be stored before
+ * actual options; move other options back
+ * and clear it when none present.
+ */
+ if (m->m_data + m->m_len + sizeof(struct in_addr) >= &m->m_dat[MLEN])
+ goto bad;
+ cnt = m->m_len;
+ m->m_len += sizeof(struct in_addr);
+ cp = mtod(m, u_char *) + sizeof(struct in_addr);
+ ovbcopy(mtod(m, caddr_t), (caddr_t)cp, (unsigned)cnt);
+ bzero(mtod(m, caddr_t), sizeof(struct in_addr));
+
+ for (; cnt > 0; cnt -= optlen, cp += optlen) {
+ opt = cp[IPOPT_OPTVAL];
+ if (opt == IPOPT_EOL)
+ break;
+ if (opt == IPOPT_NOP)
+ optlen = 1;
+ else {
+ optlen = cp[IPOPT_OLEN];
+ if (optlen <= IPOPT_OLEN || optlen > cnt)
+ goto bad;
+ }
+ switch (opt) {
+
+ default:
+ break;
+
+ case IPOPT_LSRR:
+ case IPOPT_SSRR:
+ /*
+ * user process specifies route as:
+ * ->A->B->C->D
+ * D must be our final destination (but we can't
+ * check that since we may not have connected yet).
+ * A is first hop destination, which doesn't appear in
+ * actual IP option, but is stored before the options.
+ */
+ if (optlen < IPOPT_MINOFF - 1 + sizeof(struct in_addr))
+ goto bad;
+ m->m_len -= sizeof(struct in_addr);
+ cnt -= sizeof(struct in_addr);
+ optlen -= sizeof(struct in_addr);
+ cp[IPOPT_OLEN] = optlen;
+ /*
+ * Move first hop before start of options.
+ */
+ bcopy((caddr_t)&cp[IPOPT_OFFSET+1], mtod(m, caddr_t),
+ sizeof(struct in_addr));
+ /*
+ * Then copy rest of options back
+ * to close up the deleted entry.
+ */
+ ovbcopy((caddr_t)(&cp[IPOPT_OFFSET+1] +
+ sizeof(struct in_addr)),
+ (caddr_t)&cp[IPOPT_OFFSET+1],
+ (unsigned)cnt + sizeof(struct in_addr));
+ break;
+ }
+ }
+ if (m->m_len > MAX_IPOPTLEN + sizeof(struct in_addr))
+ goto bad;
+ *pcbopt = m;
+ return (0);
+
+bad:
+ (void)m_free(m);
+ return (EINVAL);
+}
+
+/*
+ * Set the IP multicast options in response to user setsockopt().
+ */
+int
+ip_setmoptions(optname, imop, m)
+ int optname;
+ struct ip_moptions **imop;
+ struct mbuf *m;
+{
+ register int error = 0;
+#ifndef __REACTOS__
+ u_char loop;
+ register int i;
+ struct in_addr addr;
+ register struct ip_mreq *mreq;
+ register struct ifnet *ifp;
+#endif
+ register struct ip_moptions *imo = *imop;
+#ifndef __REACTOS__
+ struct route ro;
+ register struct sockaddr_in *dst;
+ int s;
+#endif
+
+ if (imo == NULL) {
+ /*
+ * No multicast option buffer attached to the pcb;
+ * allocate one and initialize to default values.
+ */
+ imo = (struct ip_moptions*)malloc(sizeof(*imo), M_IPMOPTS,
+ M_WAITOK);
+
+ if (imo == NULL)
+ return (ENOBUFS);
+ *imop = imo;
+ imo->imo_multicast_ifp = NULL;
+ imo->imo_multicast_vif = -1;
+ imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
+ imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP;
+ imo->imo_num_memberships = 0;
+ }
+
+ switch (optname) {
+#ifndef __REACTOS__
+ /* store an index number for the vif you wanna use in the send */
+ case IP_MULTICAST_VIF:
+ if (!legal_vif_num) {
+ error = EOPNOTSUPP;
+ break;
+ }
+ if (m == NULL || m->m_len != sizeof(int)) {
+ error = EINVAL;
+ break;
+ }
+ i = *(mtod(m, int *));
+ if (!legal_vif_num(i) && (i != -1)) {
+ error = EINVAL;
+ break;
+ }
+ imo->imo_multicast_vif = i;
+ break;
+
+ case IP_MULTICAST_IF:
+ /*
+ * Select the interface for outgoing multicast packets.
+ */
+ if (m == NULL || m->m_len != sizeof(struct in_addr)) {
+ error = EINVAL;
+ break;
+ }
+ addr = *(mtod(m, struct in_addr *));
+ /*
+ * INADDR_ANY is used to remove a previous selection.
+ * When no interface is selected, a default one is
+ * chosen every time a multicast packet is sent.
+ */
+ if (addr.s_addr == INADDR_ANY) {
+ imo->imo_multicast_ifp = NULL;
+ break;
+ }
+ /*
+ * The selected interface is identified by its local
+ * IP address. Find the interface and confirm that
+ * it supports multicasting.
+ */
+ s = splimp();
+ INADDR_TO_IFP(addr, ifp);
+ if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
+ error = EADDRNOTAVAIL;
+ break;
+ }
+ imo->imo_multicast_ifp = ifp;
+ splx(s);
+ break;
+
+ case IP_MULTICAST_TTL:
+ /*
+ * Set the IP time-to-live for outgoing multicast packets.
+ */
+ if (m == NULL || m->m_len != 1) {
+ error = EINVAL;
+ break;
+ }
+ imo->imo_multicast_ttl = *(mtod(m, u_char *));
+ break;
+
+ case IP_MULTICAST_LOOP:
+ /*
+ * Set the loopback flag for outgoing multicast packets.
+ * Must be zero or one.
+ */
+ if (m == NULL || m->m_len != 1 ||
+ (loop = *(mtod(m, u_char *))) > 1) {
+ error = EINVAL;
+ break;
+ }
+ imo->imo_multicast_loop = loop;
+ break;
+
+ case IP_ADD_MEMBERSHIP:
+ /*
+ * Add a multicast group membership.
+ * Group must be a valid IP multicast address.
+ */
+ if (m == NULL || m->m_len != sizeof(struct ip_mreq)) {
+ error = EINVAL;
+ break;
+ }
+ mreq = mtod(m, struct ip_mreq *);
+ if (!IN_MULTICAST(ntohl(mreq->imr_multiaddr.s_addr))) {
+ error = EINVAL;
+ break;
+ }
+ s = splimp();
+ /*
+ * If no interface address was provided, use the interface of
+ * the route to the given multicast address.
+ */
+ if (mreq->imr_interface.s_addr == INADDR_ANY) {
+ bzero((caddr_t)&ro, sizeof(ro));
+ dst = (struct sockaddr_in *)&ro.ro_dst;
+ dst->sin_len = sizeof(*dst);
+ dst->sin_family = AF_INET;
+ dst->sin_addr = mreq->imr_multiaddr;
+ rtalloc(&ro);
+ if (ro.ro_rt == NULL) {
+ error = EADDRNOTAVAIL;
+ splx(s);
+ break;
+ }
+ ifp = ro.ro_rt->rt_ifp;
+ rtfree(ro.ro_rt);
+ }
+ else {
+ INADDR_TO_IFP(mreq->imr_interface, ifp);
+ }
+
+ /*
+ * See if we found an interface, and confirm that it
+ * supports multicast.
+ */
+ if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
+ error = EADDRNOTAVAIL;
+ splx(s);
+ break;
+ }
+ /*
+ * See if the membership already exists or if all the
+ * membership slots are full.
+ */
+ for (i = 0; i < imo->imo_num_memberships; ++i) {
+ if (imo->imo_membership[i]->inm_ifp == ifp &&
+ imo->imo_membership[i]->inm_addr.s_addr
+ == mreq->imr_multiaddr.s_addr)
+ break;
+ }
+ if (i < imo->imo_num_memberships) {
+ error = EADDRINUSE;
+ splx(s);
+ break;
+ }
+ if (i == IP_MAX_MEMBERSHIPS) {
+ error = ETOOMANYREFS;
+ splx(s);
+ break;
+ }
+ /*
+ * Everything looks good; add a new record to the multicast
+ * address list for the given interface.
+ */
+ if ((imo->imo_membership[i] =
+ in_addmulti(&mreq->imr_multiaddr, ifp)) == NULL) {
+ error = ENOBUFS;
+ splx(s);
+ break;
+ }
+ ++imo->imo_num_memberships;
+ splx(s);
+ break;
+
+ case IP_DROP_MEMBERSHIP:
+ /*
+ * Drop a multicast group membership.
+ * Group must be a valid IP multicast address.
+ */
+ if (m == NULL || m->m_len != sizeof(struct ip_mreq)) {
+ error = EINVAL;
+ break;
+ }
+ mreq = mtod(m, struct ip_mreq *);
+ if (!IN_MULTICAST(ntohl(mreq->imr_multiaddr.s_addr))) {
+ error = EINVAL;
+ break;
+ }
+
+ s = splimp();
+ /*
+ * If an interface address was specified, get a pointer
+ * to its ifnet structure.
+ */
+ if (mreq->imr_interface.s_addr == INADDR_ANY)
+ ifp = NULL;
+ else {
+ INADDR_TO_IFP(mreq->imr_interface, ifp);
+ if (ifp == NULL) {
+ error = EADDRNOTAVAIL;
+ splx(s);
+ break;
+ }
+ }
+ /*
+ * Find the membership in the membership array.
+ */
+ for (i = 0; i < imo->imo_num_memberships; ++i) {
+ if ((ifp == NULL ||
+ imo->imo_membership[i]->inm_ifp == ifp) &&
+ imo->imo_membership[i]->inm_addr.s_addr ==
+ mreq->imr_multiaddr.s_addr)
+ break;
+ }
+ if (i == imo->imo_num_memberships) {
+ error = EADDRNOTAVAIL;
+ splx(s);
+ break;
+ }
+ /*
+ * Give up the multicast address record to which the
+ * membership points.
+ */
+ in_delmulti(imo->imo_membership[i]);
+ /*
+ * Remove the gap in the membership array.
+ */
+ for (++i; i < imo->imo_num_memberships; ++i)
+ imo->imo_membership[i-1] = imo->imo_membership[i];
+ --imo->imo_num_memberships;
+ splx(s);
+ break;
+#endif
+ default:
+ error = EOPNOTSUPP;
+ break;
+ }
+
+ /*
+ * If all options have default values, no need to keep the mbuf.
+ */
+ if (imo->imo_multicast_ifp == NULL &&
+ imo->imo_multicast_vif == -1 &&
+ imo->imo_multicast_ttl == IP_DEFAULT_MULTICAST_TTL &&
+ imo->imo_multicast_loop == IP_DEFAULT_MULTICAST_LOOP &&
+ imo->imo_num_memberships == 0) {
+ free(*imop, M_IPMOPTS);
+ *imop = NULL;
+ }
+
+ return (error);
+}
+
+/*
+ * Return the IP multicast options in response to user getsockopt().
+ */
+int
+ip_getmoptions(optname, imo, mp)
+ int optname;
+ register struct ip_moptions *imo;
+ register struct mbuf **mp;
+{
+#ifndef __REACTOS__
+ u_char *ttl;
+ u_char *loop;
+ struct in_addr *addr;
+ struct in_ifaddr *ia;
+#endif
+
+ *mp = m_get(M_WAIT, MT_SOOPTS);
+
+ switch (optname) {
+#ifndef __REACTOS__
+ case IP_MULTICAST_VIF:
+ if (imo != NULL)
+ *(mtod(*mp, int *)) = imo->imo_multicast_vif;
+ else
+ *(mtod(*mp, int *)) = -1;
+ (*mp)->m_len = sizeof(int);
+ return(0);
+
+ case IP_MULTICAST_IF:
+ addr = mtod(*mp, struct in_addr *);
+ (*mp)->m_len = sizeof(struct in_addr);
+ if (imo == NULL || imo->imo_multicast_ifp == NULL)
+ addr->s_addr = INADDR_ANY;
+ else {
+ IFP_TO_IA(imo->imo_multicast_ifp, ia);
+ addr->s_addr = (ia == NULL) ? INADDR_ANY
+ : IA_SIN(ia)->sin_addr.s_addr;
+ }
+ return (0);
+
+ case IP_MULTICAST_TTL:
+ ttl = mtod(*mp, u_char *);
+ (*mp)->m_len = 1;
+ *ttl = (imo == NULL) ? IP_DEFAULT_MULTICAST_TTL
+ : imo->imo_multicast_ttl;
+ return (0);
+
+ case IP_MULTICAST_LOOP:
+ loop = mtod(*mp, u_char *);
+ (*mp)->m_len = 1;
+ *loop = (imo == NULL) ? IP_DEFAULT_MULTICAST_LOOP
+ : imo->imo_multicast_loop;
+ return (0);
+#endif
+ default:
+ return (EOPNOTSUPP);
+ }
+}
+
+/*
+ * Discard the IP multicast options.
+ */
+void
+ip_freemoptions(imo)
+ register struct ip_moptions *imo;
+{
+ register int i;
+
+ if (imo != NULL) {
+ for (i = 0; i < imo->imo_num_memberships; ++i)
+ in_delmulti(imo->imo_membership[i]);
+ free(imo, M_IPMOPTS);
+ }
+}
+
+#ifndef __REACTOS__
+/*
+ * Routine called from ip_output() to loop back a copy of an IP multicast
+ * packet to the input queue of a specified interface. Note that this
+ * calls the output routine of the loopback "driver", but with an interface
+ * pointer that might NOT be a loopback interface -- evil, but easier than
+ * replicating that code here.
+ */
+static void
+ip_mloopback(ifp, m, dst)
+ struct ifnet *ifp;
+ register struct mbuf *m;
+ register struct sockaddr_in *dst;
+{
+ register struct ip *ip;
+ struct mbuf *copym;
+
+ copym = m_copy(m, 0, M_COPYALL);
+ if (copym != NULL) {
+ /*
+ * We don't bother to fragment if the IP length is greater
+ * than the interface's MTU. Can this possibly matter?
+ */
+ ip = mtod(copym, struct ip *);
+ ip->ip_len = htons((u_short)ip->ip_len);
+ ip->ip_off = htons((u_short)ip->ip_off);
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(copym, ip->ip_hl << 2);
+ (void) looutput(ifp, copym, (struct sockaddr *)dst, NULL);
+ }
+}
+#endif
projects / reactos.git / blobdiff