dc2e474f79
general cleanup of the API. The entire API now consists of two functions similar to the pre-KSE API. The suser() function takes a thread pointer as its only argument. The td_ucred member of this thread must be valid so the only valid thread pointers are curthread and a few kernel threads such as thread0. The suser_cred() function takes a pointer to a struct ucred as its first argument and an integer flag as its second argument. The flag is currently only used for the PRISON_ROOT flag. Discussed on: smp@
876 lines
23 KiB
C
876 lines
23 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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* $FreeBSD$
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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/sockio.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.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 <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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struct at_ifaddr *at_ifaddr;
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static int aa_dorangeroute(struct ifaddr *ifa,
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u_int first, u_int last, int cmd);
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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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static int aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw);
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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(struct socket *so, u_long cmd, caddr_t data,
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struct ifnet *ifp, struct thread *td )
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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 ifaddr *ifa, *ifa0;
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/*
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* If we have an ifp, then find the matching at_ifaddr if it exists
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*/
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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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/*
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* In this first switch table we are basically getting ready for
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* the second one, by getting the atalk-specific things set up
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* so that they start to look more similar to other protocols etc.
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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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/*
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* If we have an appletalk sockaddr, scan forward of where
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* we are now on the at_ifaddr list to find one with a matching
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* address on this interface.
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* This may leave aa pointing to the first address on the
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* NEXT interface!
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*/
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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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/*
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* If we a retrying to delete an addres but didn't find such,
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* then rewurn with an error
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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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/*
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* If we are not superuser, then we don't get to do these ops.
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*/
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if ( suser(td) ) {
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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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/*
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* Look for a phase 1 address on this interface.
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* This may leave aa pointing to the first address on the
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* NEXT interface!
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*/
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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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/*
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* Look for a phase 2 address on this interface.
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* This may leave aa pointing to the first address on the
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* NEXT interface!
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*/
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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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/*
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* If we failed to find an existing at_ifaddr entry, then we
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* allocate a fresh one.
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*/
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if ( aa == (struct at_ifaddr *) 0 ) {
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aa0 = malloc(sizeof(struct at_ifaddr), M_IFADDR, M_WAITOK | M_ZERO);
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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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* If it is, stick ourself in front, otherwise
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* go to the back of the list.
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*/
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if ( at_ifaddr->aa_ifp->if_flags & IFF_LOOPBACK ) {
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aa = aa0;
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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 = aa0;
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}
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} else {
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at_ifaddr = aa0;
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}
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/*
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* Don't Add a reference for the aa itself!
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* I fell into this trap. IFAFREE tests for <=0
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* not <= 1 like RTFREE
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*/
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/* aa->aa_ifa.ifa_refcnt++; DON'T DO THIS!! */
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aa = aa0;
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/*
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* Find the end of the interface's addresses
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* and link our new one on the end
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*/
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ifa = (struct ifaddr *)aa;
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TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
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/*
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* Add a reference for the linking into the ifp_if_addrlist.
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*/
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ifa->ifa_refcnt++;
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/*
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* As the at_ifaddr contains the actual sockaddrs,
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* and the ifaddr itself, link them al together correctly.
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*/
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ifa->ifa_addr = (struct sockaddr *)&aa->aa_addr;
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ifa->ifa_dstaddr = (struct sockaddr *)&aa->aa_addr;
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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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/*
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* and link it all together
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*/
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aa->aa_ifp = ifp;
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} else {
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/*
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* If we DID find one then we clobber any routes dependent on it..
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*/
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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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/*
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* If the request is specifying phase 1, then
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* only look at a phase one address
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*/
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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 {
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/*
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* default to phase 2
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*/
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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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/*
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* By the time this switch is run we should be able to assume that
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* the "aa" pointer is valid when needed.
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*/
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switch ( cmd ) {
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case SIOCGIFADDR:
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/*
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* copy the contents of the sockaddr blindly.
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*/
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sat = (struct sockaddr_at *)&ifr->ifr_addr;
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*sat = aa->aa_addr;
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/*
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* and do some cleanups
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*/
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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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/*
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* scrub all routes.. didn't we just DO this? XXX yes, del it
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*/
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at_scrub( ifp, aa );
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/*
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* remove the ifaddr from the interface
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*/
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ifa0 = (struct ifaddr *)aa;
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TAILQ_REMOVE(&ifp->if_addrhead, ifa0, ifa_link);
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/*
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* refs goes from 1->0 if no external refs. note..
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* This will not free it ... looks for -1.
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*/
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IFAFREE(ifa0);
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/*
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* Now remove the at_ifaddr from the parallel structure
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* as well, or we'd be in deep trouble
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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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/*
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* if we found it, remove it, otherwise we screwed up.
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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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/*
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* Now dump the memory we were using.
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* Decrement the reference count.
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* This should probably be the last reference
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* as the count will go from 0 to -1.
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* (unless there is still a route referencing this)
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*/
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IFAFREE(ifa0);
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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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/*
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* Given an interface and an at_ifaddr (supposedly on that interface)
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* remove any routes that depend on this.
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* Why ifp is needed I'm not sure,
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* as aa->at_ifaddr.ifa_ifp should be the same.
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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 (ifp->if_flags & IFF_LOOPBACK) {
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if ((error = aa_delsingleroute(&aa->aa_ifa,
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&aa->aa_addr.sat_addr,
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&aa->aa_netmask.sat_addr)) != 0) {
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return( error );
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}
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} else if (ifp->if_flags & IFF_POINTOPOINT) {
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if ((error = rtinit( &aa->aa_ifa, RTM_DELETE, RTF_HOST)) != 0)
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return( error );
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} else if (ifp->if_flags & IFF_BROADCAST) {
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error = aa_dorangeroute(&aa->aa_ifa,
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ntohs(aa->aa_firstnet),
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ntohs(aa->aa_lastnet),
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RTM_DELETE );
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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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/*
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* given an at_ifaddr,a sockaddr_at and an ifp,
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* bang them all together at high speed and see what happens
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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 netinc, nodeinc, nnets;
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u_short net;
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/*
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* save the old addresses in the at_ifaddr just in case we need them.
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*/
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oldaddr = aa->aa_addr;
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onr.nr_firstnet = aa->aa_firstnet;
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onr.nr_lastnet = aa->aa_lastnet;
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/*
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* take the address supplied as an argument, and add it to the
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* at_ifnet (also given). Remember ing to update
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* those parts of the at_ifaddr that need special processing
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*/
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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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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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#if 0
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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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#endif
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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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/*
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* we'd have to copy the dstaddr field over from the sat
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* but it's not clear that it would contain the right info..
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*/
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#endif
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} else {
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/*
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* We are a normal (probably ethernet) interface.
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* apply the new address to the interface structures etc.
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* We will probe this address on the net first, before
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* applying it to ensure that it is free.. If it is not, then
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* we will try a number of other randomly generated addresses
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* in this net and then increment the net. etc.etc. until
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* we find an unused address.
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*/
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aa->aa_flags |= AFA_PROBING; /* if not loopback we Must probe? */
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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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/*
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* If we are phase 2, and the net was not specified
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* then we select a random net within the supplied netrange.
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* XXX use /dev/random?
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*/
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if ( nnets != 1 ) {
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net = ntohs( nr.nr_firstnet ) + time_second % ( 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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/*
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* if a net was supplied, then check that it is within
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* the netrange. If it is not then replace the old values
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* and return an error
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*/
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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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splx(s);
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return( EINVAL );
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}
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/*
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* otherwise just use the new net number..
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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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/*
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* we must be phase one, so just use whatever we were given.
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* I guess it really isn't going to be used... RIGHT?
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*/
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net = ntohs( sat->sat_addr.s_net );
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}
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/*
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* set the node part of the address into the ifaddr.
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* If it's not specified, be random about it...
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* XXX use /dev/random?
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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_second;
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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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/*
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* Copy the phase.
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*/
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AA_SAT( aa )->sat_range.r_netrange.nr_phase
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= ((aa->aa_flags & AFA_PHASE2) ? 2:1);
|
|
|
|
/*
|
|
* step through the nets in the range
|
|
* starting at the (possibly random) start point.
|
|
*/
|
|
for ( i = nnets, netinc = 1; i > 0; net = ntohs( nr.nr_firstnet ) +
|
|
(( net - ntohs( nr.nr_firstnet ) + netinc ) % nnets ), i-- ) {
|
|
AA_SAT( aa )->sat_addr.s_net = htons( net );
|
|
|
|
/*
|
|
* using a rather strange stepping method,
|
|
* stagger through the possible node addresses
|
|
* Once again, starting at the (possibly random)
|
|
* initial node address.
|
|
*/
|
|
for ( j = 0, nodeinc = time_second | 1; j < 256;
|
|
j++, AA_SAT( aa )->sat_addr.s_node += nodeinc ) {
|
|
if ( AA_SAT( aa )->sat_addr.s_node > 253 ||
|
|
AA_SAT( aa )->sat_addr.s_node < 1 ) {
|
|
continue;
|
|
}
|
|
aa->aa_probcnt = 10;
|
|
|
|
/*
|
|
* start off the probes as an asynchronous activity.
|
|
* though why wait 200mSec?
|
|
*/
|
|
aa->aa_ch = timeout( aarpprobe, (caddr_t)ifp, hz / 5 );
|
|
if ( tsleep( aa, PPAUSE|PCATCH, "at_ifinit", 0 )) {
|
|
/*
|
|
* theoretically we shouldn't time out here
|
|
* so if we returned with an error..
|
|
*/
|
|
printf( "at_ifinit: why did this happen?!\n" );
|
|
aa->aa_addr = oldaddr;
|
|
aa->aa_firstnet = onr.nr_firstnet;
|
|
aa->aa_lastnet = onr.nr_lastnet;
|
|
splx( s );
|
|
return( EINTR );
|
|
}
|
|
|
|
/*
|
|
* The async activity should have woken us up.
|
|
* We need to see if it was successful in finding
|
|
* a free spot, or if we need to iterate to the next
|
|
* address to try.
|
|
*/
|
|
if (( aa->aa_flags & AFA_PROBING ) == 0 ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* of course we need to break out through two loops...
|
|
*/
|
|
if (( aa->aa_flags & AFA_PROBING ) == 0 ) {
|
|
break;
|
|
}
|
|
/* reset node for next network */
|
|
AA_SAT( aa )->sat_addr.s_node = time_second;
|
|
}
|
|
|
|
/*
|
|
* if we are still trying to probe, then we have finished all
|
|
* the possible addresses, so we need to give up
|
|
*/
|
|
|
|
if ( aa->aa_flags & AFA_PROBING ) {
|
|
aa->aa_addr = oldaddr;
|
|
aa->aa_firstnet = onr.nr_firstnet;
|
|
aa->aa_lastnet = onr.nr_lastnet;
|
|
splx( s );
|
|
return( EADDRINUSE );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that we have selected an address, we need to tell the interface
|
|
* about it, just in case it needs to adjust something.
|
|
*/
|
|
if ( ifp->if_ioctl &&
|
|
( error = (*ifp->if_ioctl)( ifp, SIOCSIFADDR, (caddr_t)aa ))) {
|
|
/*
|
|
* of course this could mean that it objects violently
|
|
* so if it does, we back out again..
|
|
*/
|
|
aa->aa_addr = oldaddr;
|
|
aa->aa_firstnet = onr.nr_firstnet;
|
|
aa->aa_lastnet = onr.nr_lastnet;
|
|
splx( s );
|
|
return( error );
|
|
}
|
|
|
|
/*
|
|
* set up the netmask part of the at_ifaddr
|
|
* and point the appropriate pointer in the ifaddr to it.
|
|
* probably pointless, but what the heck.. XXX
|
|
*/
|
|
bzero(&aa->aa_netmask, sizeof(aa->aa_netmask));
|
|
aa->aa_netmask.sat_len = sizeof(struct sockaddr_at);
|
|
aa->aa_netmask.sat_family = AF_APPLETALK;
|
|
aa->aa_netmask.sat_addr.s_net = 0xffff;
|
|
aa->aa_netmask.sat_addr.s_node = 0;
|
|
aa->aa_ifa.ifa_netmask =(struct sockaddr *) &(aa->aa_netmask); /* XXX */
|
|
|
|
/*
|
|
* Initialize broadcast (or remote p2p) address
|
|
*/
|
|
bzero(&aa->aa_broadaddr, sizeof(aa->aa_broadaddr));
|
|
aa->aa_broadaddr.sat_len = sizeof(struct sockaddr_at);
|
|
aa->aa_broadaddr.sat_family = AF_APPLETALK;
|
|
|
|
aa->aa_ifa.ifa_metric = ifp->if_metric;
|
|
if (ifp->if_flags & IFF_BROADCAST) {
|
|
aa->aa_broadaddr.sat_addr.s_net = htons(0);
|
|
aa->aa_broadaddr.sat_addr.s_node = 0xff;
|
|
aa->aa_ifa.ifa_broadaddr = (struct sockaddr *) &aa->aa_broadaddr;
|
|
/* add the range of routes needed */
|
|
error = aa_dorangeroute(&aa->aa_ifa,
|
|
ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet), RTM_ADD );
|
|
}
|
|
else if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
struct at_addr rtaddr, rtmask;
|
|
|
|
bzero(&rtaddr, sizeof(rtaddr));
|
|
bzero(&rtmask, sizeof(rtmask));
|
|
/* fill in the far end if we know it here XXX */
|
|
aa->aa_ifa.ifa_dstaddr = (struct sockaddr *) &aa->aa_dstaddr;
|
|
error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask);
|
|
}
|
|
else if ( ifp->if_flags & IFF_LOOPBACK ) {
|
|
struct at_addr rtaddr, rtmask;
|
|
|
|
bzero(&rtaddr, sizeof(rtaddr));
|
|
bzero(&rtmask, sizeof(rtmask));
|
|
rtaddr.s_net = AA_SAT( aa )->sat_addr.s_net;
|
|
rtaddr.s_node = AA_SAT( aa )->sat_addr.s_node;
|
|
rtmask.s_net = 0xffff;
|
|
rtmask.s_node = 0x0; /* XXX should not be so.. should be HOST route */
|
|
error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask);
|
|
}
|
|
|
|
|
|
/*
|
|
* set the address of our "check if this addr is ours" routine.
|
|
*/
|
|
aa->aa_ifa.ifa_claim_addr = aa_claim_addr;
|
|
|
|
/*
|
|
* of course if we can't add these routes we back out, but it's getting
|
|
* risky by now XXX
|
|
*/
|
|
if ( error ) {
|
|
at_scrub( ifp, aa );
|
|
aa->aa_addr = oldaddr;
|
|
aa->aa_firstnet = onr.nr_firstnet;
|
|
aa->aa_lastnet = onr.nr_lastnet;
|
|
splx( s );
|
|
return( error );
|
|
}
|
|
|
|
/*
|
|
* note that the address has a route associated with it....
|
|
*/
|
|
aa->aa_ifa.ifa_flags |= IFA_ROUTE;
|
|
aa->aa_flags |= AFA_ROUTE;
|
|
splx( s );
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* check whether a given address is a broadcast address for us..
|
|
*/
|
|
int
|
|
at_broadcast( sat )
|
|
struct sockaddr_at *sat;
|
|
{
|
|
struct at_ifaddr *aa;
|
|
|
|
/*
|
|
* If the node is not right, it can't be a broadcast
|
|
*/
|
|
if ( sat->sat_addr.s_node != ATADDR_BCAST ) {
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* If the node was right then if the net is right, it's a broadcast
|
|
*/
|
|
if ( sat->sat_addr.s_net == ATADDR_ANYNET ) {
|
|
return( 1 );
|
|
}
|
|
|
|
/*
|
|
* failing that, if the net is one we have, it's a broadcast as well.
|
|
*/
|
|
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_dorangeroute()
|
|
*
|
|
* Add a route for a range of networks from bot to top - 1.
|
|
* Algorithm:
|
|
*
|
|
* Split the range into two subranges such that the middle
|
|
* of the two ranges is the point where the highest bit of difference
|
|
* between the two addresses makes its transition.
|
|
* Each of the upper and lower ranges might not exist, or might be
|
|
* representable by 1 or more netmasks. In addition, if both
|
|
* ranges can be represented by the same netmask, then they can be merged
|
|
* by using the next higher netmask..
|
|
*/
|
|
|
|
static int
|
|
aa_dorangeroute(struct ifaddr *ifa, u_int bot, u_int top, int cmd)
|
|
{
|
|
u_int mask1;
|
|
struct at_addr addr;
|
|
struct at_addr mask;
|
|
int error;
|
|
|
|
/*
|
|
* slight sanity check
|
|
*/
|
|
if (bot > top) return (EINVAL);
|
|
|
|
addr.s_node = 0;
|
|
mask.s_node = 0;
|
|
/*
|
|
* just start out with the lowest boundary
|
|
* and keep extending the mask till it's too big.
|
|
*/
|
|
|
|
while (bot <= top) {
|
|
mask1 = 1;
|
|
while ((( bot & ~mask1) >= bot)
|
|
&& (( bot | mask1) <= top)) {
|
|
mask1 <<= 1;
|
|
mask1 |= 1;
|
|
}
|
|
mask1 >>= 1;
|
|
mask.s_net = htons(~mask1);
|
|
addr.s_net = htons(bot);
|
|
if(cmd == RTM_ADD) {
|
|
error = aa_addsingleroute(ifa,&addr,&mask);
|
|
if (error) {
|
|
/* XXX clean up? */
|
|
return (error);
|
|
}
|
|
} else {
|
|
error = aa_delsingleroute(ifa,&addr,&mask);
|
|
}
|
|
bot = (bot | mask1) + 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
aa_addsingleroute(struct ifaddr *ifa,
|
|
struct at_addr *addr, struct at_addr *mask)
|
|
{
|
|
int error;
|
|
|
|
#if 0
|
|
printf("aa_addsingleroute: %x.%x mask %x.%x ...\n",
|
|
ntohs(addr->s_net), addr->s_node,
|
|
ntohs(mask->s_net), mask->s_node);
|
|
#endif
|
|
|
|
error = aa_dosingleroute(ifa, addr, mask, RTM_ADD, RTF_UP);
|
|
if (error)
|
|
printf("aa_addsingleroute: 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_family = AF_APPLETALK;
|
|
mask.sat_len = sizeof(struct sockaddr_at);
|
|
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,
|
|
(flags & RTF_HOST)?(ifa->ifa_dstaddr):(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
|
|
|
|
static int
|
|
aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw0)
|
|
{
|
|
struct sockaddr_at *addr = (struct sockaddr_at *)ifa->ifa_addr;
|
|
struct sockaddr_at *gw = (struct sockaddr_at *)gw0;
|
|
|
|
switch (gw->sat_range.r_netrange.nr_phase) {
|
|
case 1:
|
|
if(addr->sat_range.r_netrange.nr_phase == 1)
|
|
return 1;
|
|
case 0:
|
|
case 2:
|
|
/*
|
|
* if it's our net (including 0),
|
|
* or netranges are valid, and we are in the range,
|
|
* then it's ours.
|
|
*/
|
|
if ((addr->sat_addr.s_net == gw->sat_addr.s_net)
|
|
|| ((addr->sat_range.r_netrange.nr_lastnet)
|
|
&& (ntohs(gw->sat_addr.s_net)
|
|
>= ntohs(addr->sat_range.r_netrange.nr_firstnet ))
|
|
&& (ntohs(gw->sat_addr.s_net)
|
|
<= ntohs(addr->sat_range.r_netrange.nr_lastnet )))) {
|
|
return 1;
|
|
}
|
|
break;
|
|
default:
|
|
printf("atalk: bad phase\n");
|
|
}
|
|
return 0;
|
|
}
|