Fix various problems with netatalk kernel support.
Some of these changes are a bit rough and will become more polished later. the changes to if_ethersubr should largely be moved to within the appletalk code, but that will happen later. A few of these were related to network-byteorder problems, and more were related to loopback failures.
This commit is contained in:
julian
parent
69820780d8
commit
550a296efd
@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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* $Id: if_ethersubr.c,v 1.36 1997/07/15 23:25:32 julian Exp $
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* $Id: if_ethersubr.c,v 1.37 1997/10/28 15:58:31 bde Exp $
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*/
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#include <sys/param.h>
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@ -196,21 +196,46 @@ ether_output(ifp, m0, dst, rt0)
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#endif
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#ifdef NETATALK
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case AF_APPLETALK:
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) {
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{
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struct sockaddr_at *sat = (struct sockaddr_at *)dst;
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/*
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* super hack..
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* Most of this loopback code should move into the appletalk
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* code, but it's here for now.. remember to move it! [JRE]
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* This may not get the same interface we started with,
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* fix asap. XXX
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*/
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aa = at_ifawithnet( sat );
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if (aa == NULL) {
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goto bad;
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}
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if( aa->aa_ifa.ifa_ifp != ifp ) {
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(*aa->aa_ifa.ifa_ifp->if_output)(aa->aa_ifa.ifa_ifp,
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m,dst,rt);
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}
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if (((sat->sat_addr.s_net == ATADDR_ANYNET)
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&& (sat->sat_addr.s_node == ATADDR_ANYNODE))
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|| ((sat->sat_addr.s_net == aa->aa_addr.sat_addr.s_net )
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&& (sat->sat_addr.s_node == aa->aa_addr.sat_addr.s_node))) {
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(void) looutput(ifp, m, dst, rt);
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return(0);
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}
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) {
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#ifdef NETATALKDEBUG
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extern char *prsockaddr(struct sockaddr *);
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printf("aarpresolv: failed for %s\n", prsockaddr(dst));
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extern char *prsockaddr(struct sockaddr *);
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printf("aarpresolv: failed for %s\n", prsockaddr(dst));
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#endif NETATALKDEBUG
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return (0);
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}
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/*
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* ifaddr is the first thing in at_ifaddr
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*/
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if ((aa = (struct at_ifaddr *)at_ifawithnet(
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(struct sockaddr_at *)dst, &ifp->if_addrhead))
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== 0)
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goto bad;
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return (0);
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}
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/*
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* If broadcasting on a simplex interface, loopback a copy
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*/
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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}
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/*
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* In the phase 2 case, we need to prepend an mbuf for the llc header.
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* Since we must preserve the value of m, which is passed to us by
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@ -92,31 +92,24 @@ aarptimer(void *ignored)
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* the given network.. remember to take netranges into
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* consideration.
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*/
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struct ifaddr *
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at_ifawithnet( sat, ifah )
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struct sockaddr_at *sat;
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struct ifaddrhead *ifah;
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struct at_ifaddr *
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at_ifawithnet(struct sockaddr_at *sat )
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{
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struct at_ifaddr *aa;
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struct sockaddr_at *sat2;
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struct netrange *nr;
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struct ifaddr *ifa;
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for (ifa = ifah->tqh_first; ifa; ifa = ifa->ifa_link.tqe_next ) {
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if ( ifa->ifa_addr->sa_family != AF_APPLETALK ) {
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continue;
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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sat2 = &(aa->aa_addr);
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if ( sat2->sat_addr.s_net == sat->sat_addr.s_net ) {
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break;
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}
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if( (aa->aa_flags & AFA_PHASE2 )
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&& (ntohs(aa->aa_firstnet) <= ntohs(sat->sat_addr.s_net))
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&& (ntohs(aa->aa_lastnet) >= ntohs(sat->sat_addr.s_net))) {
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break;
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}
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}
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sat2 = satosat( ifa->ifa_addr );
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if ( sat2->sat_addr.s_net == sat->sat_addr.s_net ) {
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break;
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}
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nr = (struct netrange *)(sat2->sat_zero);
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if( (nr->nr_phase == 2 )
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&& (nr->nr_firstnet <= sat->sat_addr.s_net)
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&& (nr->nr_lastnet >= sat->sat_addr.s_net)) {
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break;
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}
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}
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return( ifa );
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return( aa );
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}
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static void
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@ -154,8 +147,7 @@ aarpwhohas( struct arpcom *ac, struct sockaddr_at *sat )
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* interface with the same address as we're looking for. If the
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* net is phase 2, generate an 802.2 and SNAP header.
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*/
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if ((aa = (struct at_ifaddr *)at_ifawithnet(sat, &ac->ac_if.if_addrhead))
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== NULL) {
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if ((aa = at_ifawithnet( sat )) == NULL) {
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m_freem( m );
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return;
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}
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@ -212,8 +204,8 @@ aarpresolve( ac, m, destsat, desten )
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int s;
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if ( at_broadcast( destsat )) {
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if ((aa = (struct at_ifaddr *)at_ifawithnet(destsat,
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&((struct ifnet *)ac)->if_addrhead)) == NULL) {
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m->m_flags |= M_BCAST;
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if ((aa = at_ifawithnet( destsat )) == NULL) {
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m_freem( m );
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return( 0 );
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}
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@ -324,8 +316,7 @@ at_aarpinput( struct arpcom *ac, struct mbuf *m)
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sat.sat_len = sizeof(struct sockaddr_at);
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sat.sat_family = AF_APPLETALK;
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sat.sat_addr.s_net = net;
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if ((aa = (struct at_ifaddr *)at_ifawithnet(&sat,
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&ac->ac_if.if_addrhead)) == NULL) {
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if ((aa = at_ifawithnet( &sat )) == NULL) {
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m_freem( m );
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return;
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}
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@ -861,10 +861,10 @@ aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw0)
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*/
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if ((addr->sat_addr.s_net == gw->sat_addr.s_net)
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|| ((addr->sat_range.r_netrange.nr_lastnet)
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&& (gw->sat_addr.s_net
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>= addr->sat_range.r_netrange.nr_firstnet )
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&& (gw->sat_addr.s_net
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<= addr->sat_range.r_netrange.nr_lastnet ))) {
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&& (ntohs(gw->sat_addr.s_net)
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>= ntohs(addr->sat_range.r_netrange.nr_firstnet ))
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&& (ntohs(gw->sat_addr.s_net)
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<= ntohs(addr->sat_range.r_netrange.nr_lastnet )))) {
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return 1;
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}
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break;
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@ -21,8 +21,7 @@ extern int at_control __P(( struct socket *so,
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struct proc *p ));
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extern u_short at_cksum __P(( struct mbuf *m, int skip));
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extern void ddp_init __P((void ));
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extern struct ifaddr *at_ifawithnet __P((struct sockaddr_at *,
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struct ifaddrhead *));
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extern struct at_ifaddr *at_ifawithnet __P((struct sockaddr_at *));
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#ifdef _NETATALK_DDP_VAR_H_
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extern int ddp_output __P((struct mbuf *m, struct socket *so));
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@ -40,6 +40,9 @@ atintr( void )
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struct at_ifaddr *aa;
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int s;
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/*
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* First pull off all the phase 2 packets.
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*/
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for (;;) {
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s = splimp();
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@ -52,19 +55,12 @@ atintr( void )
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}
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ifp = m->m_pkthdr.rcvif;
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 )) {
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break;
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}
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}
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if ( aa == NULL ) { /* ifp not an appletalk interface */
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m_freem( m );
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continue;
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}
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ddp_input( m, ifp, (struct elaphdr *)NULL, 2 );
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}
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/*
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* Then pull off all the phase 1 packets.
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*/
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for (;;) {
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s = splimp();
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@ -77,15 +73,6 @@ atintr( void )
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}
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ifp = m->m_pkthdr.rcvif;
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
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break;
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}
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}
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if ( aa == NULL ) { /* ifp not an appletalk interface */
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m_freem( m );
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continue;
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}
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if ( m->m_len < SZ_ELAPHDR &&
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(( m = m_pullup( m, SZ_ELAPHDR )) == 0 )) {
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@ -93,6 +80,9 @@ atintr( void )
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continue;
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}
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/*
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* this seems a little dubios, but I don't know phase 1 so leave it.
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*/
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elhp = mtod( m, struct elaphdr *);
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m_adj( m, SZ_ELAPHDR );
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@ -124,7 +114,14 @@ ddp_input( m, ifp, elh, phase )
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u_short cksum = 0;
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bzero( (caddr_t)&from, sizeof( struct sockaddr_at ));
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bzero( (caddr_t)&to, sizeof( struct sockaddr_at ));
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if ( elh ) {
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/*
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* Extract the information in the short header.
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* netowrk information is defaulted to ATADDR_ANYNET
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* and node information comes from the elh info.
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* We must be phase 1.
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*/
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ddpstat.ddps_short++;
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if ( m->m_len < sizeof( struct ddpshdr ) &&
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@ -145,18 +142,32 @@ ddp_input( m, ifp, elh, phase )
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from.sat_addr.s_node = elh->el_snode;
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from.sat_port = ddps.dsh_sport;
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/*
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* Make sure that we point to the phase1 ifaddr info
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* and that it's valid for this packet.
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*/
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 ) == 0 &&
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( AA_SAT( aa )->sat_addr.s_node == to.sat_addr.s_node ||
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to.sat_addr.s_node == ATADDR_BCAST )) {
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if ( (aa->aa_ifp == ifp)
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&& ( (aa->aa_flags & AFA_PHASE2) == 0)
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&& ( (to.sat_addr.s_node == AA_SAT( aa )->sat_addr.s_node)
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|| (to.sat_addr.s_node == ATADDR_BCAST))) {
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break;
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}
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}
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/*
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* maybe we got a broadcast not meant for us.. ditch it.
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*/
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if ( aa == NULL ) {
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m_freem( m );
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return;
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}
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} else {
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/*
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* There was no 'elh' passed on. This could still be
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* either phase1 or phase2.
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* We have a long header, but we may be running on a pahse 1 net.
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* Extract out all the info regarding this packet's src & dst.
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*/
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ddpstat.ddps_long++;
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if ( m->m_len < sizeof( struct ddpehdr ) &&
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@ -182,6 +193,18 @@ ddp_input( m, ifp, elh, phase )
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to.sat_port = ddpe.deh_dport;
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if ( to.sat_addr.s_net == ATADDR_ANYNET ) {
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/*
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* The TO address doesn't specify a net,
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* So by definition it's for this net.
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* Try find ifaddr info with the right phase,
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* the right interface, and either to our node, a bradcast,
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* or looped back (though that SHOULD be covered in the other
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* cases).
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*
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* XXX If we have multiple interfaces, then the first with
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* this node number will match (which may NOT be what we want,
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* but it's probably safe in 99.999% of cases.
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*/
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if ( phase == 1 && ( aa->aa_flags & AFA_PHASE2 )) {
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continue;
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@ -189,27 +212,47 @@ ddp_input( m, ifp, elh, phase )
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if ( phase == 2 && ( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
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continue;
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}
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if ( aa->aa_ifp == ifp &&
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( AA_SAT( aa )->sat_addr.s_node == to.sat_addr.s_node ||
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to.sat_addr.s_node == ATADDR_BCAST ||
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( ifp->if_flags & IFF_LOOPBACK ))) {
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if ( (aa->aa_ifp == ifp)
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&& ( (to.sat_addr.s_node == AA_SAT( aa )->sat_addr.s_node)
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|| (to.sat_addr.s_node == ATADDR_BCAST)
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|| (ifp->if_flags & IFF_LOOPBACK))) {
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break;
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}
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}
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} else {
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/*
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* A destination network was given. We just try to find
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* which ifaddr info matches it.
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*/
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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/*
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* This is a kludge. Accept packets that are
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* for any router on a local netrange.
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*/
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if ( to.sat_addr.s_net == aa->aa_firstnet &&
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to.sat_addr.s_node == 0 ) {
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break;
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}
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if (( ntohs( to.sat_addr.s_net ) < ntohs( aa->aa_firstnet ) ||
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ntohs( to.sat_addr.s_net ) > ntohs( aa->aa_lastnet )) &&
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( ntohs( to.sat_addr.s_net ) < ntohs( 0xff00 ) ||
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ntohs( to.sat_addr.s_net ) > ntohs( 0xfffe ))) {
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/*
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* Don't use ifaddr info for which we are totally outside the
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* netrange, and it's not a startup packet.
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* Startup packets are always implicitly allowed on to
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* the next test.
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*/
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if ((( ntohs( to.sat_addr.s_net ) < ntohs( aa->aa_firstnet ))
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|| (ntohs( to.sat_addr.s_net ) > ntohs( aa->aa_lastnet )))
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&& (( ntohs( to.sat_addr.s_net ) < ntohs( 0xff00 ))
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|| (ntohs( to.sat_addr.s_net ) > ntohs( 0xfffe )))) {
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continue;
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}
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if ( to.sat_addr.s_node != AA_SAT( aa )->sat_addr.s_node &&
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to.sat_addr.s_node != ATADDR_BCAST ) {
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/*
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* Don't record a match either if we just don't have a match
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* in the node address. This can have if the interface
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* is in promiscuous mode for example.
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*/
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if (( to.sat_addr.s_node != AA_SAT( aa )->sat_addr.s_node)
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&& (to.sat_addr.s_node != ATADDR_BCAST) ) {
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continue;
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}
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break;
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@ -233,43 +276,75 @@ ddp_input( m, ifp, elh, phase )
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}
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/*
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* XXX Should we deliver broadcasts locally, also, or rely on the
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* link layer to give us a copy? For the moment, the latter.
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* If it aint for a net on any of our interfaces,
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* or it IS for a net on a different interface than it came in on,
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* (and it is not looped back) then consider if we shoulf forward it.
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* As we a re not really a router this is a bit cheaky, but it may be
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* useful some day.
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*/
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if ( aa == NULL || ( to.sat_addr.s_node == ATADDR_BCAST &&
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aa->aa_ifp != ifp && ( ifp->if_flags & IFF_LOOPBACK ) == 0 )) {
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if ( (aa == NULL)
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|| ( (to.sat_addr.s_node == ATADDR_BCAST)
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&& (aa->aa_ifp != ifp)
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&& (( ifp->if_flags & IFF_LOOPBACK ) == 0 ))) {
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/*
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* If we've explicitly disabled it, don't route anything
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*/
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if ( ddp_forward == 0 ) {
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m_freem( m );
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return;
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}
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if ( forwro.ro_rt && ( satosat( &forwro.ro_dst )->sat_addr.s_net !=
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to.sat_addr.s_net ||
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satosat( &forwro.ro_dst )->sat_addr.s_node !=
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to.sat_addr.s_node )) {
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/*
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* If the cached forwarding route is still valid, use it.
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*/
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if ( forwro.ro_rt
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&& ( satosat(&forwro.ro_dst)->sat_addr.s_net != to.sat_addr.s_net
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|| satosat(&forwro.ro_dst)->sat_addr.s_node != to.sat_addr.s_node )) {
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RTFREE( forwro.ro_rt );
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forwro.ro_rt = (struct rtentry *)0;
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}
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if ( forwro.ro_rt == (struct rtentry *)0 ||
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forwro.ro_rt->rt_ifp == (struct ifnet *)0 ) {
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/*
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* If we don't have a cached one (any more) or it's useless,
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* Then get a new route.
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* XXX this could cause a 'route leak'. check this!
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*/
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if ( forwro.ro_rt == (struct rtentry *)0
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|| forwro.ro_rt->rt_ifp == (struct ifnet *)0 ) {
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forwro.ro_dst.sa_len = sizeof( struct sockaddr_at );
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forwro.ro_dst.sa_family = AF_APPLETALK;
|
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satosat( &forwro.ro_dst )->sat_addr.s_net = to.sat_addr.s_net;
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satosat( &forwro.ro_dst )->sat_addr.s_node = to.sat_addr.s_node;
|
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rtalloc( &forwro );
|
||||
satosat(&forwro.ro_dst)->sat_addr.s_net = to.sat_addr.s_net;
|
||||
satosat(&forwro.ro_dst)->sat_addr.s_node = to.sat_addr.s_node;
|
||||
rtalloc(&forwro);
|
||||
}
|
||||
|
||||
if ( to.sat_addr.s_net != satosat( &forwro.ro_dst )->sat_addr.s_net &&
|
||||
ddpe.deh_hops == DDP_MAXHOPS ) {
|
||||
/*
|
||||
* If it's not going to get there on this hop, and it's
|
||||
* already done too many hops, then throw it away.
|
||||
*/
|
||||
if ( (to.sat_addr.s_net != satosat( &forwro.ro_dst )->sat_addr.s_net)
|
||||
&& (ddpe.deh_hops == DDP_MAXHOPS) ) {
|
||||
m_freem( m );
|
||||
return;
|
||||
}
|
||||
|
||||
if ( ddp_firewall &&
|
||||
( forwro.ro_rt == NULL || forwro.ro_rt->rt_ifp != ifp )) {
|
||||
/*
|
||||
* A ddp router might use the same interface
|
||||
* to forward the packet, which this would not effect.
|
||||
* Don't allow packets to cross from one interface to another however.
|
||||
*/
|
||||
if ( ddp_firewall
|
||||
&& ( (forwro.ro_rt == NULL)
|
||||
|| (forwro.ro_rt->rt_ifp != ifp))) {
|
||||
m_freem( m );
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Adjust the header.
|
||||
* If it was a short header then it would have not gotten here,
|
||||
* so we can assume there is room to drop the header in.
|
||||
* XXX what about promiscuous mode, etc...
|
||||
*/
|
||||
ddpe.deh_hops++;
|
||||
ddpe.deh_bytes = htonl( ddpe.deh_bytes );
|
||||
bcopy( (caddr_t)&ddpe, (caddr_t)deh, sizeof( u_short )); /* XXX deh? */
|
||||
@ -281,9 +356,16 @@ ddp_input( m, ifp, elh, phase )
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* It was for us, and we have an ifaddr to use with it.
|
||||
*/
|
||||
from.sat_len = sizeof( struct sockaddr_at );
|
||||
from.sat_family = AF_APPLETALK;
|
||||
|
||||
/*
|
||||
* We are no longer interested in the link layer.
|
||||
* so cut it off.
|
||||
*/
|
||||
if ( elh ) {
|
||||
m_adj( m, sizeof( struct ddpshdr ));
|
||||
} else {
|
||||
@ -295,21 +377,36 @@ ddp_input( m, ifp, elh, phase )
|
||||
m_adj( m, sizeof( struct ddpehdr ));
|
||||
}
|
||||
|
||||
/*
|
||||
* Search for ddp protocol control blocks that match these
|
||||
* addresses.
|
||||
*/
|
||||
if (( ddp = ddp_search( &from, &to, aa )) == NULL ) {
|
||||
m_freem( m );
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we found one, deliver th epacket to the socket
|
||||
*/
|
||||
if ( sbappendaddr( &ddp->ddp_socket->so_rcv, (struct sockaddr *)&from,
|
||||
m, (struct mbuf *)0 ) == 0 ) {
|
||||
/*
|
||||
* If the socket is full (or similar error) dump the packet.
|
||||
*/
|
||||
ddpstat.ddps_nosockspace++;
|
||||
m_freem( m );
|
||||
return;
|
||||
}
|
||||
/*
|
||||
* And wake up whatever might be waiting for it
|
||||
*/
|
||||
sorwakeup( ddp->ddp_socket );
|
||||
}
|
||||
|
||||
#if 0
|
||||
/* As if we haven't got enough of this sort of think floating
|
||||
around the kernel :) */
|
||||
|
||||
#define BPXLEN 48
|
||||
#define BPALEN 16
|
||||
|
||||
@ -124,11 +124,11 @@ ddp_route( struct mbuf *m, struct route *ro)
|
||||
if ( (ro->ro_rt != NULL)
|
||||
&& ( ro->ro_rt->rt_ifa )
|
||||
&& ( ifp = ro->ro_rt->rt_ifa->ifa_ifp )) {
|
||||
net = satosat(ro->ro_rt->rt_gateway)->sat_addr.s_net;
|
||||
net = ntohs(satosat(ro->ro_rt->rt_gateway)->sat_addr.s_net);
|
||||
for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
|
||||
if (((net == 0) || (aa->aa_ifp == ifp)) &&
|
||||
ntohs( net ) >= ntohs( aa->aa_firstnet ) &&
|
||||
ntohs( net ) <= ntohs( aa->aa_lastnet )) {
|
||||
net >= ntohs( aa->aa_firstnet ) &&
|
||||
net <= ntohs( aa->aa_lastnet )) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user