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Massively COMMENT at_control.c

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and fix some bugs..
also fix a bug in aarp.c that didn't take netranges into account.
default routes now work with appletalk, which is a poor-man's
way of being able to access netranges if you only have one network :)

Hopefully the full netranges fix will happen soon.
This commit is contained in:
julian 1996-08-29 23:16:34 +00:00
parent 60f630a42e
commit d6528e09bf
2 changed files with 278 additions and 43 deletions
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17
sys/netatalk/aarp.c
View File

@ -89,20 +89,33 @@ aarptimer(void *ignored)
}
}
/*
* search through the network addresses to find one that includes
* the given network.. remember to take netranges into
* consideration.
*/
struct ifaddr *
at_ifawithnet( sat, ifa )
struct sockaddr_at *sat;
struct ifaddr *ifa;
{
struct sockaddr_at *sat2;
struct netrange *nr;
for (; ifa; ifa = ifa->ifa_next ) {
if ( ifa->ifa_addr->sa_family != AF_APPLETALK ) {
continue;
}
if ( satosat( ifa->ifa_addr )->sat_addr.s_net ==
sat->sat_addr.s_net ) {
sat2 = satosat( ifa->ifa_addr );
if ( sat2->sat_addr.s_net == sat->sat_addr.s_net ) {
break;
}
nr = (struct netrange *)(sat2->sat_zero);
if( (nr->nr_phase == 2 )
&& (nr->nr_firstnet <= sat->sat_addr.s_net)
&& (nr->nr_lastnet >= sat->sat_addr.s_net)) {
break;
}
}
return( ifa );
}

304
sys/netatalk/at_control.c
View File

@ -53,15 +53,31 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
struct mbuf *m;
struct ifaddr *ifa;
/*
* If we have an ifp, then find the matching at_ifaddr if it exists
*/
if ( ifp ) {
for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp ) break;
}
}
/*
* In this first switch table we are basically getting ready for
* the second one, by getting the atalk-specific things set up
* so that they start to look more similar to other protocols etc.
*/
switch ( cmd ) {
case SIOCAIFADDR:
case SIOCDIFADDR:
/*
* If we have an appletalk sockaddr, scan forward of where
* we are now on the at_ifaddr list to find one with a matching
* address on this interface.
* This may leave aa pointing to the first address on the
* NEXT interface!
*/
if ( ifra->ifra_addr.sat_family == AF_APPLETALK ) {
for ( ; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp &&
@ -70,12 +86,19 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
}
}
}
/*
* If we a retrying to delete an addres but didn't find such,
* then rewurn with an error
*/
if ( cmd == SIOCDIFADDR && aa == 0 ) {
return( EADDRNOTAVAIL );
}
/*FALLTHROUGH*/
case SIOCSIFADDR:
/*
* If we are not superuser, then we don't get to do these ops.
*/
if ( suser(p->p_ucred, &p->p_acflag) ) {
return( EPERM );
}
@ -83,6 +106,11 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
sat = satosat( &ifr->ifr_addr );
nr = (struct netrange *)sat->sat_zero;
if ( nr->nr_phase == 1 ) {
/*
* Look for a phase 1 address on this interface.
* This may leave aa pointing to the first address on the
* NEXT interface!
*/
for ( ; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp &&
( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
@ -90,6 +118,11 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
}
}
} else { /* default to phase 2 */
/*
* Look for a phase 2 address on this interface.
* This may leave aa pointing to the first address on the
* NEXT interface!
*/
for ( ; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 )) {
break;
@ -100,6 +133,11 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
if ( ifp == 0 )
panic( "at_control" );
/*
* If we failed to find an existing at_ifaddr entry, then we
* allocate a fresh one.
* XXX change this to use malloc
*/
if ( aa == (struct at_ifaddr *) 0 ) {
m = m_getclr( M_WAIT, MT_IFADDR );
if ( m == (struct mbuf *)NULL ) {
@ -111,6 +149,8 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
* Don't let the loopback be first, since the first
* address is the machine's default address for
* binding.
* If it is, stick ourself in front, otherwise
* go to the back of the list.
*/
if ( at_ifaddr->aa_ifp->if_flags & IFF_LOOPBACK ) {
aa = mtod( m, struct at_ifaddr *);
@ -127,6 +167,10 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
aa = mtod( m, struct at_ifaddr *);
/*
* Find the end of the interface's addresses
* and link our new one on the end
*/
if (( ifa = ifp->if_addrlist ) != NULL ) {
for ( ; ifa->ifa_next; ifa = ifa->ifa_next )
;
@ -135,6 +179,10 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
ifp->if_addrlist = (struct ifaddr *)aa;
}
/*
* As the at_ifaddr contains the actual sockaddrs,
* and the ifaddr itself, link them al together correctly.
*/
aa->aa_ifa.ifa_addr = (struct sockaddr *)&aa->aa_addr;
aa->aa_ifa.ifa_dstaddr = (struct sockaddr *)&aa->aa_addr;
aa->aa_ifa.ifa_netmask = (struct sockaddr *)&aa->aa_netmask;
@ -147,8 +195,15 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
} else {
aa->aa_flags |= AFA_PHASE2;
}
/*
* and link it all together
*/
aa->aa_ifp = ifp;
} else {
/*
* If we DID find one then we clobber any routes dependent on it..
*/
at_scrub( ifp, aa );
}
break;
@ -157,13 +212,20 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
sat = satosat( &ifr->ifr_addr );
nr = (struct netrange *)sat->sat_zero;
if ( nr->nr_phase == 1 ) {
/*
* If the request is specifying phase 1, then
* only look at a phase one address
*/
for ( ; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp &&
( aa->aa_flags & AFA_PHASE2 ) == 0 ) {
break;
}
}
} else { /* default to phase 2 */
} else {
/*
* default to phase 2
*/
for ( ; aa; aa = aa->aa_next ) {
if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 )) {
break;
@ -176,10 +238,22 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
break;
}
/*
* By the time this switch is run we should be able to assume that
* the "aa" pointer is valid when needed.
*/
switch ( cmd ) {
case SIOCGIFADDR:
/*
* copy the contents of the sockaddr blindly.
*/
sat = (struct sockaddr_at *)&ifr->ifr_addr;
*sat = aa->aa_addr;
/*
* and do some cleanups
*/
((struct netrange *)&sat->sat_zero)->nr_phase
= (aa->aa_flags & AFA_PHASE2) ? 2 : 1;
((struct netrange *)&sat->sat_zero)->nr_firstnet = aa->aa_firstnet;
@ -196,13 +270,24 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
return( at_ifinit( ifp, aa, (struct sockaddr_at *)&ifr->ifr_addr ));
case SIOCDIFADDR:
/*
* scrub all routes.. didn't we just DO this? XXX yes, del it
*/
at_scrub( ifp, aa );
/*
* remove the ifaddr from the interface
*/
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 we found it, remove it, otherwise we screwed up.
*/
if ( ifa->ifa_next ) {
ifa->ifa_next = ((struct ifaddr *)aa)->ifa_next;
} else {
@ -210,6 +295,10 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
}
}
/*
* Now remove the at_ifaddr from the parallel structure
* as well, or we'd be in deep trouble
*/
aa0 = aa;
if ( aa0 == ( aa = at_ifaddr )) {
at_ifaddr = aa->aa_next;
@ -217,12 +306,20 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
while ( aa->aa_next && ( aa->aa_next != aa0 )) {
aa = aa->aa_next;
}
/*
* if we found it, remove it, otherwise we screwed up.
*/
if ( aa->aa_next ) {
aa->aa_next = aa0->aa_next;
} else {
panic( "at_control" );
}
}
/*
* Now dump the memory we were using
*/
m_free( dtom( aa0 ));
break;
@ -234,6 +331,12 @@ at_control( int cmd, caddr_t data, struct ifnet *ifp, struct proc *p )
return( 0 );
}
/*
* Given an interface and an at_ifaddr (supposedly on that interface)
* remove any routes that depend on this.
* Why ifp is needed I'm not sure,
* as aa->at_ifaddr.ifa_ifp should be the same.
*/
static int
at_scrub( ifp, aa )
struct ifnet *ifp;
@ -252,6 +355,10 @@ at_scrub( ifp, aa )
return( 0 );
}
/*
* given an at_ifaddr,a sockaddr_at and an ifp,
* bang them all together at high speed and see what happens
*/
static int
at_ifinit( ifp, aa, sat )
struct ifnet *ifp;
@ -264,14 +371,22 @@ at_ifinit( ifp, aa, sat )
int flags = RTF_UP, netinc, nodeinc, nnets;
u_short net;
/*
* save the old addresses in the at_ifaddr just in case we need them.
*/
oldaddr = aa->aa_addr;
onr.nr_firstnet = aa->aa_firstnet;
onr.nr_lastnet = aa->aa_lastnet;
/*
* take the address supplied as an argument, and add it to the
* at_ifnet (also given). Remember ing to update
* those parts of the at_ifaddr that need special processing
*/
bzero( AA_SAT( aa ), sizeof( struct sockaddr_at ));
bcopy( sat->sat_zero, &nr, sizeof( struct netrange ));
bcopy( sat->sat_zero, AA_SAT( aa )->sat_zero, sizeof( struct netrange ));
nnets = ntohs( nr.nr_lastnet ) - ntohs( nr.nr_firstnet ) + 1;
onr.nr_firstnet = aa->aa_firstnet;
onr.nr_lastnet = aa->aa_lastnet;
aa->aa_firstnet = nr.nr_firstnet;
aa->aa_lastnet = nr.nr_lastnet;
@ -296,19 +411,42 @@ at_ifinit( ifp, aa, sat )
#if 0
} else if ( fp->if_flags & IFF_POINTOPOINT) {
/* unimplemented */
/*
* we'd have to copy the dstaddr field over from the sat
* but it's not clear that it would contain the right info..
*/
#endif
} else {
aa->aa_flags |= AFA_PROBING;
/*
* We are a normal (probably ethernet) interface.
* apply the new address to the interface structures etc.
* We will probe this address on the net first, before
* applying it to ensure that it is free.. If it is not, then
* we will try a number of other randomly generated addresses
* in this net and then increment the net. etc.etc. until
* we find an unused address.
*/
aa->aa_flags |= AFA_PROBING; /* if not loopback we Must probe? */
AA_SAT( aa )->sat_len = sizeof(struct sockaddr_at);
AA_SAT( aa )->sat_family = AF_APPLETALK;
if ( aa->aa_flags & AFA_PHASE2 ) {
if ( sat->sat_addr.s_net == ATADDR_ANYNET ) {
/*
* If we are phase 2, and the net was not specified
* then we select a random net within the supplied netrange.
* XXX use /dev/random?
*/
if ( nnets != 1 ) {
net = ntohs( nr.nr_firstnet ) + time.tv_sec % ( nnets - 1 );
} else {
net = ntohs( nr.nr_firstnet );
}
} else {
/*
* if a net was supplied, then check that it is within
* the netrange. If it is not then replace the old values
* and return an error
*/
if ( ntohs( sat->sat_addr.s_net ) < ntohs( nr.nr_firstnet ) ||
ntohs( sat->sat_addr.s_net ) > ntohs( nr.nr_lastnet )) {
aa->aa_addr = oldaddr;
@ -316,22 +454,44 @@ at_ifinit( ifp, aa, sat )
aa->aa_lastnet = onr.nr_lastnet;
return( EINVAL );
}
/*
* otherwise just use the new net number..
*/
net = ntohs( sat->sat_addr.s_net );
}
} else {
/*
* we must be phase one, so just use whatever we were given.
* I guess it really isn't going to be used... RIGHT?
*/
net = ntohs( sat->sat_addr.s_net );
}
/*
* set the node part of the address into the ifaddr.
* If it's not specified, be random about it...
* XXX use /dev/random?
*/
if ( sat->sat_addr.s_node == ATADDR_ANYNODE ) {
AA_SAT( aa )->sat_addr.s_node = time.tv_sec;
} else {
AA_SAT( aa )->sat_addr.s_node = sat->sat_addr.s_node;
}
/*
* 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.tv_sec | 1; j < 256;
j++, AA_SAT( aa )->sat_addr.s_node += nodeinc ) {
if ( AA_SAT( aa )->sat_addr.s_node > 253 ||
@ -339,20 +499,40 @@ at_ifinit( ifp, aa, sat )
continue;
}
aa->aa_probcnt = 10;
/*
* start off the probes as an asynchronous activity.
* though why wait 200mSec?
*/
timeout( (timeout_func_t)aarpprobe, (caddr_t)ifp, hz / 5 );
splx( s );
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;
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.
*/
s = splimp();
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;
}
@ -360,6 +540,11 @@ at_ifinit( ifp, aa, sat )
AA_SAT( aa )->sat_addr.s_node = time.tv_sec;
}
/*
* 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;
@ -369,8 +554,16 @@ at_ifinit( ifp, aa, sat )
}
}
/*
* 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;
@ -378,54 +571,57 @@ at_ifinit( ifp, aa, sat )
return( error );
}
#if 1
/* this works */
aa->aa_netmask.sat_len = 6/*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 */
#else
/* this doesn't */
/* Initialize netmask and broadcast address */
/*
* set up the netmask part of the at_ifaddr
* and point the appropriate pointer in the ifaddr to it.
*/
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;
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_ifa.ifa_broadaddr = (struct sockaddr *) &aa->aa_broadaddr;
aa->aa_broadaddr.sat_len = sizeof(struct sockaddr_at);
aa->aa_broadaddr.sat_family = AF_APPLETALK;
/* "Add a route to the network" */
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_netmask.sat_addr.s_net = htons(0xffff); /* XXX */
aa->aa_netmask.sat_addr.s_node = 0; /* XXX */
} else if (ifp->if_flags & IFF_LOOPBACK) {
aa->aa_ifa.ifa_broadaddr = (struct sockaddr *) &aa->aa_broadaddr;
}
#if 0
else if (ifp->if_flags & IFF_LOOPBACK) {
aa->aa_ifa.ifa_dstaddr = aa->aa_ifa.ifa_addr;
aa->aa_netmask.sat_addr.s_net = htons(0xffff); /* XXX */
aa->aa_netmask.sat_addr.s_node = 0xff; /* XXX */
flags |= RTF_HOST;
} else if (ifp->if_flags & IFF_POINTOPOINT) {
aa->aa_ifa.ifa_dstaddr = aa->aa_ifa.ifa_addr;
}
#endif
else if (ifp->if_flags & IFF_POINTOPOINT) {
aa->aa_ifa.ifa_dstaddr = (struct sockaddr *) &aa->aa_dstaddr;
aa->aa_netmask.sat_addr.s_net = htons(0xffff);
aa->aa_netmask.sat_addr.s_node = 0xff;
flags |= RTF_HOST;
}
#endif
error = rtinit(&aa->aa_ifa, RTM_ADD, flags);
#if 0
/*
* Now that we have selected an address, it becomes
* important that we start setting up the routing table so that
* we can actually USE that address.
*/
if ( ifp->if_flags & IFF_LOOPBACK ) {
#if 1
error = rtinit(&aa->aa_ifa, RTM_ADD, flags);
#else
struct at_addr rtaddr, rtmask;
bzero(&rtaddr, sizeof(rtaddr));
@ -433,12 +629,15 @@ at_ifinit( ifp, aa, sat )
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 = 0xff;
rtmask.s_node = 0x0;
flags |= RTF_HOST;
error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask);
#endif
} else {
#if 1
error = rtinit(&aa->aa_ifa, RTM_ADD, flags);
#else
/* Install routes for our own network, and then also for
all networks above and below it in the network range */
@ -454,10 +653,14 @@ at_ifinit( ifp, aa, sat )
error = aa_addrangeroute(&aa->aa_ifa,
ntohs(aa->aa_addr.sat_addr.s_net) + 1,
ntohs(aa->aa_lastnet) + 1);
}
#endif
}
/*
* of course if we can't add these routes we back out, but it's getting
* risky by now XXX
*/
if ( error ) {
aa->aa_addr = oldaddr;
aa->aa_firstnet = onr.nr_firstnet;
@ -466,30 +669,46 @@ at_ifinit( ifp, aa, sat )
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 );
} 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 );
}
}
/*
* 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 );
@ -609,7 +828,7 @@ aa_delsingleroute(struct ifaddr *ifa,
error = aa_dosingleroute(ifa, addr, mask, RTM_DELETE, 0);
if (error)
printf("aa_delsingleroute: error %d\n", error);
printf("aa_delsingleroute: error %d\n", error);
return(error);
}
@ -625,12 +844,15 @@ aa_dosingleroute(struct ifaddr *ifa,
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, ifa->ifa_addr,
(struct sockaddr *) &mask, flags, NULL));
return(rtrequest(cmd, (struct sockaddr *) &addr,
(flags & RTF_HOST)?(ifa->ifa_dstaddr):(ifa->ifa_addr),
(struct sockaddr *) &mask, flags, NULL));
}
#if 0