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439e36c655
freebsd-skq/sys/netatalk/at_control.c
Robert Watson 439e36c655 Re-style at_control.c to bring it closer to style(9), primarily with 
regard to function prototypes and indentation.  The lack of indentation
in if clauses and case statements made this code extremely difficult
to read.
2004-07-19 17:15:51 +00:00

839 lines
22 KiB
C
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/*
* Copyright (c) 1990,1991 Regents of The University of Michigan.
* All Rights Reserved.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#undef s_net
#include <netinet/if_ether.h>
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#include <netatalk/at_extern.h>
struct at_ifaddr *at_ifaddr_list;
static int aa_dorangeroute(struct ifaddr *ifa,
u_int first, u_int last, int cmd);
static int aa_addsingleroute(struct ifaddr *ifa,
struct at_addr *addr, struct at_addr *mask);
static int aa_delsingleroute(struct ifaddr *ifa,
struct at_addr *addr, struct at_addr *mask);
static int aa_dosingleroute(struct ifaddr *ifa, struct at_addr *addr,
struct at_addr *mask, int cmd, int flags);
static int at_scrub(struct ifnet *ifp, struct at_ifaddr *aa);
static int at_ifinit(struct ifnet *ifp, struct at_ifaddr *aa,
struct sockaddr_at *sat);
static int aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw);
# define sateqaddr(a,b) ((a)->sat_len == (b)->sat_len && \
(a)->sat_family == (b)->sat_family && \
(a)->sat_addr.s_net == (b)->sat_addr.s_net && \
(a)->sat_addr.s_node == (b)->sat_addr.s_node)
int
at_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
struct thread *td)
{
struct ifreq *ifr = (struct ifreq *)data;
struct sockaddr_at *sat;
struct netrange *nr;
struct at_aliasreq *ifra = (struct at_aliasreq *)data;
struct at_ifaddr *aa0;
struct at_ifaddr *aa = NULL;
struct ifaddr *ifa, *ifa0;
/*
* If we have an ifp, then find the matching at_ifaddr if it exists
*/
if (ifp != NULL) {
for (aa = at_ifaddr_list; aa != NULL; 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 &&
sateqaddr(&aa->aa_addr, &ifra->ifra_addr))
break;
}
}
/*
* If we a retrying to delete an addres but didn't find such,
* then rewurn with an error
*/
if (cmd == SIOCDIFADDR && aa == NULL)
return (EADDRNOTAVAIL);
/*FALLTHROUGH*/
case SIOCSIFADDR:
/*
* If we are not superuser, then we don't get to do these ops.
*/
if (suser(td))
return (EPERM);
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)
break;
}
} 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;
}
}
if (ifp == NULL)
panic("at_control");
/*
* If we failed to find an existing at_ifaddr entry, then we
* allocate a fresh one.
*/
if (aa == NULL) {
aa0 = malloc(sizeof(struct at_ifaddr), M_IFADDR,
M_WAITOK | M_ZERO);
if ((aa = at_ifaddr_list) != NULL) {
/*
* 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_list->aa_ifp->if_flags &
IFF_LOOPBACK) {
aa = aa0;
aa->aa_next = at_ifaddr_list;
at_ifaddr_list = aa;
} else {
for (; aa->aa_next; aa = aa->aa_next)
;
aa->aa_next = aa0;
}
} else
at_ifaddr_list = aa0;
aa = aa0;
/*
* Find the end of the interface's addresses
* and link our new one on the end
*/
ifa = (struct ifaddr *)aa;
IFA_LOCK_INIT(ifa);
ifa->ifa_refcnt = 1;
TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
/*
* As the at_ifaddr contains the actual sockaddrs,
* and the ifaddr itself, link them al together
* correctly.
*/
ifa->ifa_addr = (struct sockaddr *)&aa->aa_addr;
ifa->ifa_dstaddr = (struct sockaddr *)&aa->aa_addr;
ifa->ifa_netmask = (struct sockaddr *)&aa->aa_netmask;
/*
* Set/clear the phase 2 bit.
*/
if (nr->nr_phase == 1)
aa->aa_flags &= ~AFA_PHASE2;
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;
case SIOCGIFADDR :
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
*/
for (; aa; aa = aa->aa_next) {
if (aa->aa_ifp == ifp && (aa->aa_flags &
AFA_PHASE2))
break;
}
}
if (aa == NULL)
return (EADDRNOTAVAIL);
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;
((struct netrange *)&sat->sat_zero)->nr_lastnet =
aa->aa_lastnet;
break;
case SIOCSIFADDR:
return (at_ifinit(ifp, aa,
(struct sockaddr_at *)&ifr->ifr_addr));
case SIOCAIFADDR:
if (sateqaddr(&ifra->ifra_addr, &aa->aa_addr))
return (0);
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
*/
ifa0 = (struct ifaddr *)aa;
TAILQ_REMOVE(&ifp->if_addrhead, ifa0, ifa_link);
/*
* 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_list)) {
at_ifaddr_list = aa->aa_next;
} else {
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 reclaim the reference.
*/
IFAFREE(ifa0);
break;
default:
if (ifp == NULL || ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, data));
}
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(struct ifnet *ifp, struct at_ifaddr *aa)
{
int error;
if (aa->aa_flags & AFA_ROUTE) {
if (ifp->if_flags & IFF_LOOPBACK) {
if ((error = aa_delsingleroute(&aa->aa_ifa,
&aa->aa_addr.sat_addr, &aa->aa_netmask.sat_addr))
!= 0)
return (error);
} else if (ifp->if_flags & IFF_POINTOPOINT) {
if ((error = rtinit(&aa->aa_ifa, RTM_DELETE,
RTF_HOST)) != 0)
return (error);
} else if (ifp->if_flags & IFF_BROADCAST) {
error = aa_dorangeroute(&aa->aa_ifa,
ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet),
RTM_DELETE);
}
aa->aa_ifa.ifa_flags &= ~IFA_ROUTE;
aa->aa_flags &= ~AFA_ROUTE;
}
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(struct ifnet *ifp, struct at_ifaddr *aa, struct sockaddr_at *sat)
{
struct netrange nr, onr;
struct sockaddr_at oldaddr;
int error = 0, i, j;
int 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;
aa->aa_firstnet = nr.nr_firstnet;
aa->aa_lastnet = nr.nr_lastnet;
/* XXX ALC */
#if 0
printf("at_ifinit: %s: %u.%u range %u-%u phase %d\n",
ifp->if_name,
ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node,
ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet),
(aa->aa_flags & AFA_PHASE2) ? 2 : 1);
#endif
/*
* We could eliminate the need for a second phase 1 probe (post
* autoconf) if we check whether we're resetting the node. Note
* that phase 1 probes use only nodes, not net.node pairs. Under
* phase 2, both the net and node must be the same.
*/
if (ifp->if_flags & IFF_LOOPBACK) {
AA_SAT(aa)->sat_len = sat->sat_len;
AA_SAT(aa)->sat_family = AF_APPLETALK;
AA_SAT(aa)->sat_addr.s_net = sat->sat_addr.s_net;
AA_SAT(aa)->sat_addr.s_node = sat->sat_addr.s_node;
#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 {
/*
* 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; /* 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_second % (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;
aa->aa_firstnet = onr.nr_firstnet;
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_second;
else
AA_SAT(aa)->sat_addr.s_node = sat->sat_addr.s_node;
/*
* Copy the phase.
*/
AA_SAT(aa)->sat_range.r_netrange.nr_phase =
((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;
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;
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 != NULL &&
(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;
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;
/* XXX should not be so.. should be HOST route */
rtmask.s_node = 0x0;
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;
return (error);
}
/*
* note that the address has a route associated with it....
*/
aa->aa_ifa.ifa_flags |= IFA_ROUTE;
aa->aa_flags |= AFA_ROUTE;
return (0);
}
/*
* check whether a given address is a broadcast address for us..
*/
int
at_broadcast(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_list; aa != NULL; 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_list) != NULL) {
ifp = aa->aa_ifp;
at_scrub(ifp, aa);
at_ifaddr_list = 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);
}
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