654 lines
17 KiB
C
654 lines
17 KiB
C
/*
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* Copyright (c) 1990,1991 Regents of The University of Michigan.
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* All Rights Reserved.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#undef s_net
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#include <netinet/if_ether.h>
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#include "at.h"
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#include "at_var.h"
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#include "aarp.h"
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#include "phase2.h"
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#include <netatalk/at_extern.h>
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static int aa_addrangeroute(struct ifaddr *ifa, int first, int last);
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static int aa_addsingleroute(struct ifaddr *ifa,
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struct at_addr *addr, struct at_addr *mask);
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static int aa_delsingleroute(struct ifaddr *ifa,
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struct at_addr *addr, struct at_addr *mask);
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static int aa_dosingleroute(struct ifaddr *ifa, struct at_addr *addr,
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struct at_addr *mask, int cmd, int flags);
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static int at_scrub( struct ifnet *ifp, struct at_ifaddr *aa );
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static int at_ifinit( struct ifnet *ifp, struct at_ifaddr *aa,
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struct sockaddr_at *sat );
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# define sateqaddr(a,b) ((a)->sat_len == (b)->sat_len && \
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(a)->sat_family == (b)->sat_family && \
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(a)->sat_addr.s_net == (b)->sat_addr.s_net && \
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(a)->sat_addr.s_node == (b)->sat_addr.s_node )
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int
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at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
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{
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struct ifreq *ifr = (struct ifreq *)data;
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struct sockaddr_at *sat;
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struct netrange *nr;
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struct at_aliasreq *ifra = (struct at_aliasreq *)data;
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struct at_ifaddr *aa0;
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struct at_ifaddr *aa = 0;
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struct mbuf *m;
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struct ifaddr *ifa;
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if ( ifp ) {
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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp ) break;
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}
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}
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switch ( cmd ) {
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case SIOCAIFADDR:
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case SIOCDIFADDR:
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if ( ifra->ifra_addr.sat_family == AF_APPLETALK ) {
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for ( ; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp &&
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sateqaddr( &aa->aa_addr, &ifra->ifra_addr )) {
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break;
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}
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}
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}
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if ( cmd == SIOCDIFADDR && aa == 0 ) {
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return( EADDRNOTAVAIL );
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}
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/*FALLTHROUGH*/
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case SIOCSIFADDR:
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if ( suser(p->p_ucred, &p->p_acflag) ) {
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return( EPERM );
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}
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sat = satosat( &ifr->ifr_addr );
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nr = (struct netrange *)sat->sat_zero;
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if ( nr->nr_phase == 1 ) {
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for ( ; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp &&
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( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
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break;
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}
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}
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} else { /* default to phase 2 */
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for ( ; 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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}
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if ( ifp == 0 )
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panic( "at_control" );
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if ( aa == (struct at_ifaddr *) 0 ) {
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m = m_getclr( M_WAIT, MT_IFADDR );
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if ( m == (struct mbuf *)NULL ) {
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return( ENOBUFS );
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}
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if (( aa = at_ifaddr ) != NULL ) {
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/*
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* Don't let the loopback be first, since the first
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* address is the machine's default address for
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* binding.
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*/
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if ( at_ifaddr->aa_ifp->if_flags & IFF_LOOPBACK ) {
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aa = mtod( m, struct at_ifaddr *);
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aa->aa_next = at_ifaddr;
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at_ifaddr = aa;
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} else {
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for ( ; aa->aa_next; aa = aa->aa_next )
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;
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aa->aa_next = mtod( m, struct at_ifaddr *);
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}
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} else {
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at_ifaddr = mtod( m, struct at_ifaddr *);
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}
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aa = mtod( m, struct at_ifaddr *);
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if (( ifa = ifp->if_addrlist ) != NULL ) {
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for ( ; ifa->ifa_next; ifa = ifa->ifa_next )
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;
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ifa->ifa_next = (struct ifaddr *)aa;
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} else {
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ifp->if_addrlist = (struct ifaddr *)aa;
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}
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aa->aa_ifa.ifa_addr = (struct sockaddr *)&aa->aa_addr;
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aa->aa_ifa.ifa_dstaddr = (struct sockaddr *)&aa->aa_dstaddr;
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aa->aa_ifa.ifa_netmask = (struct sockaddr *)&aa->aa_netmask;
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/*
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* Set/clear the phase 2 bit.
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*/
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if ( nr->nr_phase == 1 ) {
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aa->aa_flags &= ~AFA_PHASE2;
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} else {
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aa->aa_flags |= AFA_PHASE2;
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}
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aa->aa_ifp = ifp;
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} else {
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at_scrub( ifp, aa );
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}
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break;
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case SIOCGIFADDR :
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sat = satosat( &ifr->ifr_addr );
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nr = (struct netrange *)sat->sat_zero;
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if ( nr->nr_phase == 1 ) {
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for ( ; aa; aa = aa->aa_next ) {
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if ( aa->aa_ifp == ifp &&
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( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
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break;
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}
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}
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} else { /* default to phase 2 */
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for ( ; 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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}
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if ( aa == (struct at_ifaddr *) 0 )
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return( EADDRNOTAVAIL );
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break;
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}
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switch ( cmd ) {
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case SIOCGIFADDR:
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sat = (struct sockaddr_at *)&ifr->ifr_addr;
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*sat = aa->aa_addr;
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((struct netrange *)&sat->sat_zero)->nr_phase
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= (aa->aa_flags & AFA_PHASE2) ? 2 : 1;
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((struct netrange *)&sat->sat_zero)->nr_firstnet = aa->aa_firstnet;
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((struct netrange *)&sat->sat_zero)->nr_lastnet = aa->aa_lastnet;
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break;
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case SIOCSIFADDR:
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return( at_ifinit( ifp, aa, (struct sockaddr_at *)&ifr->ifr_addr ));
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case SIOCAIFADDR:
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if ( sateqaddr( &ifra->ifra_addr, &aa->aa_addr )) {
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return( 0 );
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}
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return( at_ifinit( ifp, aa, (struct sockaddr_at *)&ifr->ifr_addr ));
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case SIOCDIFADDR:
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at_scrub( ifp, aa );
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if (( ifa = ifp->if_addrlist ) == (struct ifaddr *)aa ) {
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ifp->if_addrlist = ifa->ifa_next;
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} else {
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while ( ifa->ifa_next && ( ifa->ifa_next != (struct ifaddr *)aa )) {
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ifa = ifa->ifa_next;
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}
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if ( ifa->ifa_next ) {
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ifa->ifa_next = ((struct ifaddr *)aa)->ifa_next;
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} else {
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panic( "at_control" );
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}
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}
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aa0 = aa;
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if ( aa0 == ( aa = at_ifaddr )) {
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at_ifaddr = aa->aa_next;
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} else {
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while ( aa->aa_next && ( aa->aa_next != aa0 )) {
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aa = aa->aa_next;
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}
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if ( aa->aa_next ) {
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aa->aa_next = aa0->aa_next;
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} else {
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panic( "at_control" );
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}
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}
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m_free( dtom( aa0 ));
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break;
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default:
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if ( ifp == 0 || ifp->if_ioctl == 0 )
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return( EOPNOTSUPP );
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return( (*ifp->if_ioctl)( ifp, cmd, data ));
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}
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return( 0 );
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}
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static int
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at_scrub( ifp, aa )
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struct ifnet *ifp;
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struct at_ifaddr *aa;
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{
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int error;
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if ( aa->aa_flags & AFA_ROUTE ) {
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if (( error = rtinit( &(aa->aa_ifa), RTM_DELETE,
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( ifp->if_flags & IFF_LOOPBACK ) ? RTF_HOST : 0 )) != 0 ) {
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return( error );
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}
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aa->aa_ifa.ifa_flags &= ~IFA_ROUTE;
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aa->aa_flags &= ~AFA_ROUTE;
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}
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return( 0 );
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}
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static int
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at_ifinit( ifp, aa, sat )
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struct ifnet *ifp;
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struct at_ifaddr *aa;
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struct sockaddr_at *sat;
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{
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struct netrange nr, onr;
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struct sockaddr_at oldaddr;
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int s = splimp(), error = 0, i, j;
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int flags = RTF_UP, netinc, nodeinc, nnets;
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u_short net;
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oldaddr = aa->aa_addr;
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bzero( AA_SAT( aa ), sizeof( struct sockaddr_at ));
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bcopy( sat->sat_zero, &nr, sizeof( struct netrange ));
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bcopy( sat->sat_zero, AA_SAT( aa )->sat_zero, sizeof( struct netrange ));
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nnets = ntohs( nr.nr_lastnet ) - ntohs( nr.nr_firstnet ) + 1;
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onr.nr_firstnet = aa->aa_firstnet;
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onr.nr_lastnet = aa->aa_lastnet;
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aa->aa_firstnet = nr.nr_firstnet;
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aa->aa_lastnet = nr.nr_lastnet;
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/* XXX ALC */
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printf("at_ifinit: %s: %u.%u range %u-%u phase %d\n",
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ifp->if_name,
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ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node,
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ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet),
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(aa->aa_flags & AFA_PHASE2) ? 2 : 1);
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/*
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* We could eliminate the need for a second phase 1 probe (post
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* autoconf) if we check whether we're resetting the node. Note
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* that phase 1 probes use only nodes, not net.node pairs. Under
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* phase 2, both the net and node must be the same.
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*/
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if ( ifp->if_flags & IFF_LOOPBACK ) {
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AA_SAT( aa )->sat_len = sat->sat_len;
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AA_SAT( aa )->sat_family = AF_APPLETALK;
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AA_SAT( aa )->sat_addr.s_net = sat->sat_addr.s_net;
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AA_SAT( aa )->sat_addr.s_node = sat->sat_addr.s_node;
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#if 0
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} else if ( fp->if_flags & IFF_POINTOPOINT) {
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/* unimplemented */
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#endif
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} else {
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aa->aa_flags |= AFA_PROBING;
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AA_SAT( aa )->sat_len = sizeof(struct sockaddr_at);
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AA_SAT( aa )->sat_family = AF_APPLETALK;
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if ( aa->aa_flags & AFA_PHASE2 ) {
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if ( sat->sat_addr.s_net == ATADDR_ANYNET ) {
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if ( nnets != 1 ) {
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net = ntohs( nr.nr_firstnet ) + time.tv_sec % ( nnets - 1 );
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} else {
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net = ntohs( nr.nr_firstnet );
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}
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} else {
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if ( ntohs( sat->sat_addr.s_net ) < ntohs( nr.nr_firstnet ) ||
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ntohs( sat->sat_addr.s_net ) > ntohs( nr.nr_lastnet )) {
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aa->aa_addr = oldaddr;
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aa->aa_firstnet = onr.nr_firstnet;
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aa->aa_lastnet = onr.nr_lastnet;
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return( EINVAL );
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}
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net = ntohs( sat->sat_addr.s_net );
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}
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} else {
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net = ntohs( sat->sat_addr.s_net );
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}
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if ( sat->sat_addr.s_node == ATADDR_ANYNODE ) {
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AA_SAT( aa )->sat_addr.s_node = time.tv_sec;
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} else {
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AA_SAT( aa )->sat_addr.s_node = sat->sat_addr.s_node;
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}
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for ( i = nnets, netinc = 1; i > 0; net = ntohs( nr.nr_firstnet ) +
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(( net - ntohs( nr.nr_firstnet ) + netinc ) % nnets ), i-- ) {
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AA_SAT( aa )->sat_addr.s_net = htons( net );
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for ( j = 0, nodeinc = time.tv_sec | 1; j < 256;
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j++, AA_SAT( aa )->sat_addr.s_node += nodeinc ) {
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if ( AA_SAT( aa )->sat_addr.s_node > 253 ||
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AA_SAT( aa )->sat_addr.s_node < 1 ) {
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continue;
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}
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aa->aa_probcnt = 10;
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timeout( (timeout_func_t)aarpprobe, (caddr_t)ifp, hz / 5 );
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splx( s );
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if ( tsleep( aa, PPAUSE|PCATCH, "at_ifinit", 0 )) {
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printf( "at_ifinit: why did this happen?!\n" );
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aa->aa_addr = oldaddr;
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aa->aa_firstnet = onr.nr_firstnet;
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aa->aa_lastnet = onr.nr_lastnet;
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return( EINTR );
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}
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s = splimp();
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if (( aa->aa_flags & AFA_PROBING ) == 0 ) {
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break;
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}
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}
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if (( aa->aa_flags & AFA_PROBING ) == 0 ) {
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break;
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}
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/* reset node for next network */
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AA_SAT( aa )->sat_addr.s_node = time.tv_sec;
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}
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if ( aa->aa_flags & AFA_PROBING ) {
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aa->aa_addr = oldaddr;
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aa->aa_firstnet = onr.nr_firstnet;
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aa->aa_lastnet = onr.nr_lastnet;
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splx( s );
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return( EADDRINUSE );
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}
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}
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if ( ifp->if_ioctl &&
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( error = (*ifp->if_ioctl)( ifp, SIOCSIFADDR, (caddr_t)aa ))) {
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aa->aa_addr = oldaddr;
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aa->aa_firstnet = onr.nr_firstnet;
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aa->aa_lastnet = onr.nr_lastnet;
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splx( s );
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return( error );
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}
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/* Initialize netmask and broadcast address */
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bzero(&aa->aa_netmask, sizeof(aa->aa_netmask));
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aa->aa_ifa.ifa_netmask = (struct sockaddr *) &aa->aa_netmask;
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aa->aa_netmask.sat_len = sizeof(struct sockaddr_at);
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aa->aa_netmask.sat_family = AF_APPLETALK;
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bzero(&aa->aa_broadaddr, sizeof(aa->aa_broadaddr));
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aa->aa_ifa.ifa_broadaddr = (struct sockaddr *) &aa->aa_broadaddr;
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aa->aa_broadaddr.sat_len = sizeof(struct sockaddr_at);
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aa->aa_broadaddr.sat_family = AF_APPLETALK;
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/* "Add a route to the network" */
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aa->aa_ifa.ifa_metric = ifp->if_metric;
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if (ifp->if_flags & IFF_BROADCAST) {
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aa->aa_broadaddr.sat_addr.s_net = htons(0);
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aa->aa_broadaddr.sat_addr.s_node = 0xff;
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aa->aa_netmask.sat_addr.s_net = htons(0xffff); /* XXX */
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aa->aa_netmask.sat_addr.s_node = 0; /* XXX */
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} else if (ifp->if_flags & IFF_LOOPBACK) {
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aa->aa_ifa.ifa_dstaddr = aa->aa_ifa.ifa_addr;
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aa->aa_netmask.sat_addr.s_net = htons(0xffff); /* XXX */
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aa->aa_netmask.sat_addr.s_node = 0xff; /* XXX */
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flags |= RTF_HOST;
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} else if (ifp->if_flags & IFF_POINTOPOINT) {
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aa->aa_ifa.ifa_dstaddr = aa->aa_ifa.ifa_addr;
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aa->aa_netmask.sat_addr.s_net = htons(0xffff);
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aa->aa_netmask.sat_addr.s_node = htons(0xffff);
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flags |= RTF_HOST;
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}
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error = rtinit(&aa->aa_ifa, RTM_ADD, flags);
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#if 0
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if ( ifp->if_flags & IFF_LOOPBACK ) {
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struct at_addr rtaddr, rtmask;
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bzero(&rtaddr, sizeof(rtaddr));
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bzero(&rtmask, sizeof(rtmask));
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rtaddr.s_net = AA_SAT( aa )->sat_addr.s_net;
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rtaddr.s_node = AA_SAT( aa )->sat_addr.s_node;
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rtmask.s_net = 0xffff;
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rtmask.s_node = 0xff;
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error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask);
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} else {
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/* Install routes for our own network, and then also for
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all networks above and below it in the network range */
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error = aa_addrangeroute(&aa->aa_ifa,
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ntohs(aa->aa_addr.sat_addr.s_net),
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ntohs(aa->aa_addr.sat_addr.s_net) + 1);
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if (!error
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&& ntohs(aa->aa_firstnet) < ntohs(aa->aa_addr.sat_addr.s_net))
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error = aa_addrangeroute(&aa->aa_ifa,
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ntohs(aa->aa_firstnet), ntohs(aa->aa_addr.sat_addr.s_net));
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if (!error
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&& ntohs(aa->aa_addr.sat_addr.s_net) < ntohs(aa->aa_lastnet))
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error = aa_addrangeroute(&aa->aa_ifa,
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ntohs(aa->aa_addr.sat_addr.s_net) + 1,
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ntohs(aa->aa_lastnet) + 1);
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}
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#endif
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if ( error ) {
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aa->aa_addr = oldaddr;
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aa->aa_firstnet = onr.nr_firstnet;
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aa->aa_lastnet = onr.nr_lastnet;
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splx( s );
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return( error );
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}
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aa->aa_ifa.ifa_flags |= IFA_ROUTE;
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aa->aa_flags |= AFA_ROUTE;
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splx( s );
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return( 0 );
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}
|
|
|
|
int
|
|
at_broadcast( sat )
|
|
struct sockaddr_at *sat;
|
|
{
|
|
struct at_ifaddr *aa;
|
|
|
|
if ( sat->sat_addr.s_node != ATADDR_BCAST ) {
|
|
return( 0 );
|
|
}
|
|
if ( sat->sat_addr.s_net == ATADDR_ANYNET ) {
|
|
return( 1 );
|
|
} else {
|
|
for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
|
|
if (( aa->aa_ifp->if_flags & IFF_BROADCAST ) &&
|
|
( ntohs( sat->sat_addr.s_net ) >= ntohs( aa->aa_firstnet ) &&
|
|
ntohs( sat->sat_addr.s_net ) <= ntohs( aa->aa_lastnet ))) {
|
|
return( 1 );
|
|
}
|
|
}
|
|
}
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* aa_addrangeroute()
|
|
*
|
|
* Add a route for a range of networks from bot to top - 1.
|
|
* Algorithm:
|
|
*
|
|
* Split the range into three subranges such that the middle
|
|
* subrange is from (base + 2^N) to (base + 2^N + 2^(N-1)) for
|
|
* some N. Then add a route for the middle range and recurse on
|
|
* the upper and lower sub-ranges. As a degenerate case, it may
|
|
* be that the middle subrange is empty.
|
|
*/
|
|
|
|
static int
|
|
aa_addrangeroute(struct ifaddr *ifa, int bot, int top)
|
|
{
|
|
int base, mask, mbot, mtop;
|
|
int a, b, abit, bbit, error;
|
|
struct at_addr rtaddr, rtmask;
|
|
|
|
/* Special case the whole range */
|
|
|
|
if (bot == 0 && top == 0xffff)
|
|
{
|
|
bzero(&rtaddr, sizeof(rtaddr));
|
|
bzero(&rtmask, sizeof(rtmask));
|
|
return(aa_addsingleroute(ifa, &rtaddr, &rtmask));
|
|
}
|
|
|
|
if (top <= bot)
|
|
panic("aa_addrangeroute");
|
|
|
|
/* Mask out the high order bits on which both bounds agree */
|
|
|
|
for (mask = 0xffff; (bot & mask) != (top & mask); mask <<= 1);
|
|
base = bot & mask;
|
|
a = bot & ~mask;
|
|
b = top & ~mask;
|
|
|
|
/* Find suitable powers of two between a and b we can make a route with */
|
|
|
|
for (bbit = 0x8000; bbit > b; bbit >>= 1);
|
|
if (a == 0)
|
|
abit = 0;
|
|
else
|
|
{
|
|
for (abit = 0x0001; a > abit; abit <<= 1);
|
|
if ((abit << 1) > bbit)
|
|
bbit = abit;
|
|
else
|
|
bbit = abit << 1;
|
|
}
|
|
|
|
/* Now we have a "square" middle chunk from abit to bbit, possibly empty */
|
|
|
|
mbot = base + abit;
|
|
mtop = base + bbit;
|
|
mask = ~(bbit - 1);
|
|
|
|
/* Route to the middle chunk */
|
|
|
|
if (mbot < mtop)
|
|
{
|
|
bzero(&rtaddr, sizeof(rtaddr));
|
|
bzero(&rtmask, sizeof(rtmask));
|
|
rtaddr.s_net = htons((u_short) mbot);
|
|
rtmask.s_net = htons((u_short) mask);
|
|
if ((error = aa_addsingleroute(ifa, &rtaddr, &rtmask)))
|
|
return(error);
|
|
}
|
|
|
|
/* Recurse on the upper and lower chunks we didn't get to */
|
|
|
|
if (bot < mbot)
|
|
if ((error = aa_addrangeroute(ifa, bot, mbot)))
|
|
{
|
|
if (mbot < mtop)
|
|
aa_delsingleroute(ifa, &rtaddr, &rtmask);
|
|
return(error);
|
|
}
|
|
if (mtop < top)
|
|
if ((error = aa_addrangeroute(ifa, mtop, top)))
|
|
{
|
|
if (mbot < mtop)
|
|
aa_delsingleroute(ifa, &rtaddr, &rtmask);
|
|
return(error);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
aa_addsingleroute(struct ifaddr *ifa,
|
|
struct at_addr *addr, struct at_addr *mask)
|
|
{
|
|
int error;
|
|
|
|
printf("aa_addsingleroute: %x.%x mask %x.%x ...\n",
|
|
ntohs(addr->s_net), addr->s_node,
|
|
ntohs(mask->s_net), mask->s_node);
|
|
|
|
error = aa_dosingleroute(ifa, addr, mask, RTM_ADD, RTF_UP);
|
|
if (error)
|
|
printf("error %d\n", error);
|
|
return(error);
|
|
}
|
|
|
|
static int
|
|
aa_delsingleroute(struct ifaddr *ifa,
|
|
struct at_addr *addr, struct at_addr *mask)
|
|
{
|
|
int error;
|
|
|
|
error = aa_dosingleroute(ifa, addr, mask, RTM_DELETE, 0);
|
|
if (error)
|
|
printf("aa_delsingleroute: error %d\n", error);
|
|
return(error);
|
|
}
|
|
|
|
static int
|
|
aa_dosingleroute(struct ifaddr *ifa,
|
|
struct at_addr *at_addr, struct at_addr *at_mask, int cmd, int flags)
|
|
{
|
|
struct sockaddr_at addr, mask;
|
|
|
|
bzero(&addr, sizeof(addr));
|
|
bzero(&mask, sizeof(mask));
|
|
addr.sat_family = AF_APPLETALK;
|
|
addr.sat_len = sizeof(struct sockaddr_at);
|
|
addr.sat_addr.s_net = at_addr->s_net;
|
|
addr.sat_addr.s_node = at_addr->s_node;
|
|
mask.sat_addr.s_net = at_mask->s_net;
|
|
mask.sat_addr.s_node = at_mask->s_node;
|
|
if (at_mask->s_node)
|
|
flags |= RTF_HOST;
|
|
return(rtrequest(cmd, (struct sockaddr *) &addr, ifa->ifa_addr,
|
|
(struct sockaddr *) &mask, flags, NULL));
|
|
}
|
|
|
|
#if 0
|
|
|
|
static void
|
|
aa_clean(void)
|
|
{
|
|
struct at_ifaddr *aa;
|
|
struct ifaddr *ifa;
|
|
struct ifnet *ifp;
|
|
|
|
while ( aa = at_ifaddr ) {
|
|
ifp = aa->aa_ifp;
|
|
at_scrub( ifp, aa );
|
|
at_ifaddr = aa->aa_next;
|
|
if (( ifa = ifp->if_addrlist ) == (struct ifaddr *)aa ) {
|
|
ifp->if_addrlist = ifa->ifa_next;
|
|
} else {
|
|
while ( ifa->ifa_next &&
|
|
( ifa->ifa_next != (struct ifaddr *)aa )) {
|
|
ifa = ifa->ifa_next;
|
|
}
|
|
if ( ifa->ifa_next ) {
|
|
ifa->ifa_next = ((struct ifaddr *)aa)->ifa_next;
|
|
} else {
|
|
panic( "at_entry" );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|