+++ /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