5bf423734c
remaining potential races in ifconfig's management of IPX addresses. This is largely accomplished by dropping a global write lock for the IPX address list over the body of in_control(), although there are some places we bump the refcount on an ifaddr of interest while calling out to the routing code or link layer code, which might require revisiting. Annotate one as a potential race if two simultaneous delete ioctls are issued for the same IPX addresses at once. MFC after: 3 weeks
472 lines
13 KiB
C
472 lines
13 KiB
C
/*-
|
|
* Copyright (c) 1984, 1985, 1986, 1987, 1993
|
|
* The Regents of the University of California.
|
|
* Copyright (c) 2009 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Copyright (c) 1995, Mike Mitchell
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)ipx.c
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/priv.h>
|
|
#include <sys/rwlock.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/route.h>
|
|
|
|
#include <netipx/ipx.h>
|
|
#include <netipx/ipx_if.h>
|
|
#include <netipx/ipx_var.h>
|
|
|
|
/*
|
|
* The IPX-layer address list is protected by ipx_ifaddr_rw.
|
|
*/
|
|
struct rwlock ipx_ifaddr_rw;
|
|
struct ipx_ifaddr *ipx_ifaddr;
|
|
|
|
static void ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia);
|
|
static int ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
|
|
struct sockaddr_ipx *sipx, int scrub);
|
|
|
|
/*
|
|
* Generic internet control operations (ioctl's).
|
|
*/
|
|
int
|
|
ipx_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
|
|
struct thread *td)
|
|
{
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct ipx_aliasreq *ifra = (struct ipx_aliasreq *)data;
|
|
struct ipx_ifaddr *ia;
|
|
struct ifaddr *ifa;
|
|
struct ipx_ifaddr *oia;
|
|
int dstIsNew, hostIsNew;
|
|
int error = 0, priv;
|
|
|
|
/*
|
|
* Find address for this interface, if it exists.
|
|
*/
|
|
if (ifp == NULL)
|
|
return (EADDRNOTAVAIL);
|
|
|
|
IPX_IFADDR_WLOCK();
|
|
for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
|
|
if (ia->ia_ifp == ifp)
|
|
break;
|
|
|
|
switch (cmd) {
|
|
case SIOCGIFADDR:
|
|
if (ia == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
*(struct sockaddr_ipx *)&ifr->ifr_addr = ia->ia_addr;
|
|
goto out;
|
|
|
|
case SIOCGIFBRDADDR:
|
|
if (ia == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
|
|
goto out;
|
|
|
|
case SIOCGIFDSTADDR:
|
|
if (ia == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
|
|
goto out;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SIOCAIFADDR:
|
|
case SIOCDIFADDR:
|
|
priv = (cmd == SIOCAIFADDR) ? PRIV_NET_ADDIFADDR :
|
|
PRIV_NET_DELIFADDR;
|
|
if (td && (error = priv_check(td, priv)) != 0)
|
|
goto out;
|
|
if (ifra->ifra_addr.sipx_family == AF_IPX)
|
|
for (oia = ia; ia != NULL; ia = ia->ia_next) {
|
|
if (ia->ia_ifp == ifp &&
|
|
ipx_neteq(ia->ia_addr.sipx_addr,
|
|
ifra->ifra_addr.sipx_addr))
|
|
break;
|
|
}
|
|
if (cmd == SIOCDIFADDR && ia == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
/* FALLTHROUGH */
|
|
|
|
case SIOCSIFADDR:
|
|
case SIOCSIFDSTADDR:
|
|
if (td && (error = priv_check(td, PRIV_NET_SETLLADDR)) != 0)
|
|
goto out;
|
|
if (ia == NULL) {
|
|
oia = (struct ipx_ifaddr *)
|
|
malloc(sizeof(*ia), M_IFADDR,
|
|
M_NOWAIT | M_ZERO);
|
|
if (oia == NULL) {
|
|
error = ENOBUFS;
|
|
goto out;
|
|
}
|
|
if ((ia = ipx_ifaddr) != NULL) {
|
|
for ( ; ia->ia_next != NULL; ia = ia->ia_next)
|
|
;
|
|
ia->ia_next = oia;
|
|
} else
|
|
ipx_ifaddr = oia;
|
|
ia = oia;
|
|
ifa = (struct ifaddr *)ia;
|
|
ifa_init(ifa);
|
|
ia->ia_ifp = ifp;
|
|
ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
|
|
ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
|
|
if (ifp->if_flags & IFF_BROADCAST) {
|
|
ia->ia_broadaddr.sipx_family = AF_IPX;
|
|
ia->ia_broadaddr.sipx_len =
|
|
sizeof(ia->ia_addr);
|
|
ia->ia_broadaddr.sipx_addr.x_host =
|
|
ipx_broadhost;
|
|
}
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (td && (error = priv_check(td, PRIV_NET_HWIOCTL)) != 0)
|
|
goto out;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFDSTADDR:
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (ia->ia_flags & IFA_ROUTE) {
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
|
|
ia->ia_flags &= ~IFA_ROUTE;
|
|
}
|
|
ifa_ref(&ia->ia_ifa);
|
|
IPX_IFADDR_WUNLOCK();
|
|
if (ifp->if_ioctl) {
|
|
error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
|
|
(void *)ia);
|
|
if (error) {
|
|
ifa_free(&ia->ia_ifa);
|
|
return (error);
|
|
}
|
|
}
|
|
*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
|
|
ifa_free(&ia->ia_ifa);
|
|
return (0);
|
|
|
|
case SIOCSIFADDR:
|
|
ifa_ref(&ia->ia_ifa);
|
|
IPX_IFADDR_WUNLOCK();
|
|
error = ipx_ifinit(ifp, ia,
|
|
(struct sockaddr_ipx *)&ifr->ifr_addr, 1);
|
|
ifa_free(&ia->ia_ifa);
|
|
return (error);
|
|
|
|
case SIOCDIFADDR:
|
|
/* XXXRW: Potential race here while ipx_ifaddr_rw is dropped. */
|
|
ifa_ref(&ia->ia_ifa);
|
|
IPX_IFADDR_WUNLOCK();
|
|
ipx_ifscrub(ifp, ia);
|
|
IPX_IFADDR_WLOCK();
|
|
ifa_free(&ia->ia_ifa);
|
|
ifa = (struct ifaddr *)ia;
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
oia = ia;
|
|
if (oia == (ia = ipx_ifaddr)) {
|
|
ipx_ifaddr = ia->ia_next;
|
|
} else {
|
|
while (ia->ia_next && (ia->ia_next != oia)) {
|
|
ia = ia->ia_next;
|
|
}
|
|
if (ia->ia_next)
|
|
ia->ia_next = oia->ia_next;
|
|
else
|
|
printf("Didn't unlink ipxifadr from list\n");
|
|
}
|
|
ifa_free(&oia->ia_ifa);
|
|
IPX_IFADDR_WUNLOCK();
|
|
return (0);
|
|
|
|
case SIOCAIFADDR:
|
|
dstIsNew = 0;
|
|
hostIsNew = 1;
|
|
if (ia->ia_addr.sipx_family == AF_IPX) {
|
|
if (ifra->ifra_addr.sipx_len == 0) {
|
|
ifra->ifra_addr = ia->ia_addr;
|
|
hostIsNew = 0;
|
|
} else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
|
|
ia->ia_addr.sipx_addr))
|
|
hostIsNew = 0;
|
|
}
|
|
ifa_ref(&ia->ia_ifa);
|
|
IPX_IFADDR_WUNLOCK();
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) &&
|
|
(ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
|
|
if (hostIsNew == 0)
|
|
ipx_ifscrub(ifp, ia);
|
|
ia->ia_dstaddr = ifra->ifra_dstaddr;
|
|
dstIsNew = 1;
|
|
}
|
|
if (ifra->ifra_addr.sipx_family == AF_IPX &&
|
|
(hostIsNew || dstIsNew))
|
|
error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
|
|
ifa_free(&ia->ia_ifa);
|
|
return (error);
|
|
|
|
default:
|
|
IPX_IFADDR_WUNLOCK();
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
return ((*ifp->if_ioctl)(ifp, cmd, data));
|
|
}
|
|
|
|
out:
|
|
IPX_IFADDR_WUNLOCK();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete any previous route for an old address.
|
|
*/
|
|
static void
|
|
ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia)
|
|
{
|
|
|
|
if (ia->ia_flags & IFA_ROUTE) {
|
|
if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
|
|
} else
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
|
|
ia->ia_flags &= ~IFA_ROUTE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize an interface's internet address and routing table entry.
|
|
*/
|
|
static int
|
|
ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
|
|
struct sockaddr_ipx *sipx, int scrub)
|
|
{
|
|
struct sockaddr_ipx oldaddr;
|
|
int s = splimp(), error;
|
|
|
|
/*
|
|
* Set up new addresses.
|
|
*/
|
|
oldaddr = ia->ia_addr;
|
|
ia->ia_addr = *sipx;
|
|
|
|
/*
|
|
* The convention we shall adopt for naming is that a supplied
|
|
* address of zero means that "we don't care". Use the MAC address
|
|
* of the interface. If it is an interface without a MAC address,
|
|
* like a serial line, the address must be supplied.
|
|
*
|
|
* Give the interface a chance to initialize if this is its first
|
|
* address, and to validate the address if necessary.
|
|
*/
|
|
if (ifp->if_ioctl != NULL &&
|
|
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (void *)ia))) {
|
|
ia->ia_addr = oldaddr;
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
splx(s);
|
|
ia->ia_ifa.ifa_metric = ifp->if_metric;
|
|
|
|
/*
|
|
* Add route for the network.
|
|
*/
|
|
if (scrub) {
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
|
|
ipx_ifscrub(ifp, ia);
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
}
|
|
if (ifp->if_flags & IFF_POINTOPOINT)
|
|
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
|
|
else {
|
|
ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
|
|
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
|
|
}
|
|
ia->ia_flags |= IFA_ROUTE;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return address info for specified internet network.
|
|
*/
|
|
struct ipx_ifaddr *
|
|
ipx_iaonnetof(struct ipx_addr *dst)
|
|
{
|
|
struct ipx_ifaddr *ia;
|
|
struct ipx_addr *compare;
|
|
struct ifnet *ifp;
|
|
struct ipx_ifaddr *ia_maybe = NULL;
|
|
union ipx_net net = dst->x_net;
|
|
|
|
IPX_IFADDR_LOCK_ASSERT();
|
|
|
|
for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
|
|
if ((ifp = ia->ia_ifp) != NULL) {
|
|
if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
compare = &satoipx_addr(ia->ia_dstaddr);
|
|
if (ipx_hosteq(*dst, *compare))
|
|
return (ia);
|
|
if (ipx_neteqnn(net,
|
|
ia->ia_addr.sipx_addr.x_net))
|
|
ia_maybe = ia;
|
|
} else {
|
|
if (ipx_neteqnn(net,
|
|
ia->ia_addr.sipx_addr.x_net))
|
|
return (ia);
|
|
}
|
|
}
|
|
}
|
|
return (ia_maybe);
|
|
}
|
|
|
|
void
|
|
ipx_printhost(struct ipx_addr *addr)
|
|
{
|
|
u_short port;
|
|
struct ipx_addr work = *addr;
|
|
char *p; u_char *q;
|
|
char *net = "", *host = "";
|
|
char cport[10], chost[15], cnet[15];
|
|
|
|
port = ntohs(work.x_port);
|
|
|
|
if (ipx_nullnet(work) && ipx_nullhost(work)) {
|
|
if (port)
|
|
printf("*.%x", port);
|
|
else
|
|
printf("*.*");
|
|
|
|
return;
|
|
}
|
|
|
|
if (ipx_wildnet(work))
|
|
net = "any";
|
|
else if (ipx_nullnet(work))
|
|
net = "*";
|
|
else {
|
|
q = work.x_net.c_net;
|
|
snprintf(cnet, sizeof(cnet), "%x%x%x%x",
|
|
q[0], q[1], q[2], q[3]);
|
|
for (p = cnet; *p == '0' && p < cnet + 8; p++)
|
|
continue;
|
|
net = p;
|
|
}
|
|
|
|
if (ipx_wildhost(work))
|
|
host = "any";
|
|
else if (ipx_nullhost(work))
|
|
host = "*";
|
|
else {
|
|
q = work.x_host.c_host;
|
|
snprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
|
|
q[0], q[1], q[2], q[3], q[4], q[5]);
|
|
for (p = chost; *p == '0' && p < chost + 12; p++)
|
|
continue;
|
|
host = p;
|
|
}
|
|
|
|
if (port) {
|
|
if (strcmp(host, "*") == 0) {
|
|
host = "";
|
|
snprintf(cport, sizeof(cport), "%x", port);
|
|
} else
|
|
snprintf(cport, sizeof(cport), ".%x", port);
|
|
} else
|
|
*cport = 0;
|
|
|
|
printf("%s.%s%s", net, host, cport);
|
|
}
|