1994-05-24 10:09:53 +00:00
|
|
|
/*
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|
|
|
* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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|
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* modification, are permitted provided that the following conditions
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* are met:
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|
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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|
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* notice, this list of conditions and the following disclaimer in the
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|
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* documentation and/or other materials provided with the distribution.
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|
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
|
1995-09-21 17:50:45 +00:00
|
|
|
* @(#)in.c 8.4 (Berkeley) 1/9/95
|
1999-08-28 01:08:13 +00:00
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|
|
* $FreeBSD$
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
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|
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|
|
#include <sys/param.h>
|
1994-05-25 09:21:21 +00:00
|
|
|
#include <sys/systm.h>
|
1997-03-24 11:33:46 +00:00
|
|
|
#include <sys/sockio.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/malloc.h>
|
|
|
|
#include <sys/socket.h>
|
1995-12-09 20:43:53 +00:00
|
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/sysctl.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
#include <net/if.h>
|
1999-12-22 19:13:38 +00:00
|
|
|
#include <net/if_types.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <net/route.h>
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|
|
|
|
|
|
|
#include <netinet/in.h>
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|
|
#include <netinet/in_var.h>
|
2001-08-04 17:10:14 +00:00
|
|
|
#include <netinet/in_pcb.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1995-02-14 06:28:25 +00:00
|
|
|
#include <netinet/igmp_var.h>
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|
|
|
1997-10-12 20:26:33 +00:00
|
|
|
static MALLOC_DEFINE(M_IPMADDR, "in_multi", "internet multicast address");
|
1997-10-11 18:31:40 +00:00
|
|
|
|
1999-12-22 19:13:38 +00:00
|
|
|
static int in_mask2len __P((struct in_addr *));
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|
|
|
static void in_len2mask __P((struct in_addr *, int));
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|
|
static int in_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
|
2001-09-12 08:38:13 +00:00
|
|
|
struct ifnet *, struct thread *));
|
1999-12-22 19:13:38 +00:00
|
|
|
|
1995-11-14 20:34:56 +00:00
|
|
|
static void in_socktrim __P((struct sockaddr_in *));
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|
|
static int in_ifinit __P((struct ifnet *,
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|
|
|
struct in_ifaddr *, struct sockaddr_in *, int));
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1996-09-09 20:17:24 +00:00
|
|
|
static int subnetsarelocal = 0;
|
1995-12-09 20:43:53 +00:00
|
|
|
SYSCTL_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW,
|
|
|
|
&subnetsarelocal, 0, "");
|
1997-01-13 21:26:53 +00:00
|
|
|
|
|
|
|
struct in_multihead in_multihead; /* XXX BSS initialization */
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|
|
|
2001-08-04 17:10:14 +00:00
|
|
|
extern struct inpcbinfo ripcbinfo;
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|
|
extern struct inpcbinfo udbinfo;
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|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
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|
|
|
* Return 1 if an internet address is for a ``local'' host
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|
|
* (one to which we have a connection). If subnetsarelocal
|
|
|
|
* is true, this includes other subnets of the local net.
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|
|
* Otherwise, it includes only the directly-connected (sub)nets.
|
|
|
|
*/
|
1994-05-25 09:21:21 +00:00
|
|
|
int
|
1994-05-24 10:09:53 +00:00
|
|
|
in_localaddr(in)
|
|
|
|
struct in_addr in;
|
|
|
|
{
|
|
|
|
register u_long i = ntohl(in.s_addr);
|
|
|
|
register struct in_ifaddr *ia;
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|
|
|
|
|
|
|
if (subnetsarelocal) {
|
2001-03-16 20:00:53 +00:00
|
|
|
TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
|
1994-05-24 10:09:53 +00:00
|
|
|
if ((i & ia->ia_netmask) == ia->ia_net)
|
|
|
|
return (1);
|
|
|
|
} else {
|
2001-02-04 16:08:18 +00:00
|
|
|
TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
|
1994-05-24 10:09:53 +00:00
|
|
|
if ((i & ia->ia_subnetmask) == ia->ia_subnet)
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
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|
|
|
* Determine whether an IP address is in a reserved set of addresses
|
|
|
|
* that may not be forwarded, or whether datagrams to that destination
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|
|
|
* may be forwarded.
|
|
|
|
*/
|
1994-05-25 09:21:21 +00:00
|
|
|
int
|
1994-05-24 10:09:53 +00:00
|
|
|
in_canforward(in)
|
|
|
|
struct in_addr in;
|
|
|
|
{
|
|
|
|
register u_long i = ntohl(in.s_addr);
|
|
|
|
register u_long net;
|
|
|
|
|
|
|
|
if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i))
|
|
|
|
return (0);
|
|
|
|
if (IN_CLASSA(i)) {
|
|
|
|
net = i & IN_CLASSA_NET;
|
|
|
|
if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT))
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Trim a mask in a sockaddr
|
|
|
|
*/
|
1995-11-14 20:34:56 +00:00
|
|
|
static void
|
1994-05-24 10:09:53 +00:00
|
|
|
in_socktrim(ap)
|
|
|
|
struct sockaddr_in *ap;
|
|
|
|
{
|
|
|
|
register char *cplim = (char *) &ap->sin_addr;
|
|
|
|
register char *cp = (char *) (&ap->sin_addr + 1);
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|
|
|
|
|
|
|
ap->sin_len = 0;
|
1994-11-03 21:04:21 +00:00
|
|
|
while (--cp >= cplim)
|
1994-05-24 10:09:53 +00:00
|
|
|
if (*cp) {
|
|
|
|
(ap)->sin_len = cp - (char *) (ap) + 1;
|
|
|
|
break;
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|
|
|
}
|
|
|
|
}
|
|
|
|
|
1999-12-22 19:13:38 +00:00
|
|
|
static int
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|
|
|
in_mask2len(mask)
|
|
|
|
struct in_addr *mask;
|
|
|
|
{
|
|
|
|
int x, y;
|
|
|
|
u_char *p;
|
|
|
|
|
|
|
|
p = (u_char *)mask;
|
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|
|
for (x = 0; x < sizeof(*mask); x++) {
|
|
|
|
if (p[x] != 0xff)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
y = 0;
|
|
|
|
if (x < sizeof(*mask)) {
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
|
|
if ((p[x] & (0x80 >> y)) == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return x * 8 + y;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
in_len2mask(mask, len)
|
|
|
|
struct in_addr *mask;
|
|
|
|
int len;
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u_char *p;
|
|
|
|
|
|
|
|
p = (u_char *)mask;
|
|
|
|
bzero(mask, sizeof(*mask));
|
|
|
|
for (i = 0; i < len / 8; i++)
|
|
|
|
p[i] = 0xff;
|
|
|
|
if (len % 8)
|
|
|
|
p[i] = (0xff00 >> (len % 8)) & 0xff;
|
|
|
|
}
|
|
|
|
|
1995-12-09 20:43:53 +00:00
|
|
|
static int in_interfaces; /* number of external internet interfaces */
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Generic internet control operations (ioctl's).
|
|
|
|
* Ifp is 0 if not an interface-specific ioctl.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1994-05-25 09:21:21 +00:00
|
|
|
int
|
2001-09-12 08:38:13 +00:00
|
|
|
in_control(so, cmd, data, ifp, td)
|
1994-05-24 10:09:53 +00:00
|
|
|
struct socket *so;
|
1998-06-07 17:13:14 +00:00
|
|
|
u_long cmd;
|
1994-05-24 10:09:53 +00:00
|
|
|
caddr_t data;
|
|
|
|
register struct ifnet *ifp;
|
2001-09-12 08:38:13 +00:00
|
|
|
struct thread *td;
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
|
|
|
register struct ifreq *ifr = (struct ifreq *)data;
|
1996-03-15 17:08:07 +00:00
|
|
|
register struct in_ifaddr *ia = 0, *iap;
|
1994-05-24 10:09:53 +00:00
|
|
|
register struct ifaddr *ifa;
|
|
|
|
struct in_ifaddr *oia;
|
|
|
|
struct in_aliasreq *ifra = (struct in_aliasreq *)data;
|
|
|
|
struct sockaddr_in oldaddr;
|
1996-04-07 06:59:52 +00:00
|
|
|
int error, hostIsNew, maskIsNew, s;
|
1994-05-24 10:09:53 +00:00
|
|
|
u_long i;
|
|
|
|
|
1999-12-22 19:13:38 +00:00
|
|
|
switch (cmd) {
|
|
|
|
case SIOCALIFADDR:
|
|
|
|
case SIOCDLIFADDR:
|
2001-09-12 08:38:13 +00:00
|
|
|
if (td && (error = suser_td(td)) != 0)
|
1999-12-22 19:13:38 +00:00
|
|
|
return error;
|
|
|
|
/*fall through*/
|
|
|
|
case SIOCGLIFADDR:
|
|
|
|
if (!ifp)
|
|
|
|
return EINVAL;
|
2001-09-12 08:38:13 +00:00
|
|
|
return in_lifaddr_ioctl(so, cmd, data, ifp, td);
|
1999-12-22 19:13:38 +00:00
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Find address for this interface, if it exists.
|
1996-03-15 17:08:07 +00:00
|
|
|
*
|
|
|
|
* If an alias address was specified, find that one instead of
|
|
|
|
* the first one on the interface.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
if (ifp)
|
2001-03-16 20:00:53 +00:00
|
|
|
TAILQ_FOREACH(iap, &in_ifaddrhead, ia_link)
|
1996-03-15 17:08:07 +00:00
|
|
|
if (iap->ia_ifp == ifp) {
|
|
|
|
if (((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr ==
|
|
|
|
iap->ia_addr.sin_addr.s_addr) {
|
|
|
|
ia = iap;
|
|
|
|
break;
|
|
|
|
} else if (ia == NULL) {
|
|
|
|
ia = iap;
|
|
|
|
if (ifr->ifr_addr.sa_family != AF_INET)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
|
|
|
|
case SIOCAIFADDR:
|
|
|
|
case SIOCDIFADDR:
|
1998-12-07 05:41:10 +00:00
|
|
|
if (ifp == 0)
|
|
|
|
return (EADDRNOTAVAIL);
|
1995-04-25 19:50:20 +00:00
|
|
|
if (ifra->ifra_addr.sin_family == AF_INET) {
|
2001-02-04 13:13:25 +00:00
|
|
|
for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) {
|
1995-04-25 19:50:20 +00:00
|
|
|
if (ia->ia_ifp == ifp &&
|
|
|
|
ia->ia_addr.sin_addr.s_addr ==
|
|
|
|
ifra->ifra_addr.sin_addr.s_addr)
|
|
|
|
break;
|
|
|
|
}
|
1995-05-30 08:16:23 +00:00
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT)
|
1995-04-25 19:50:20 +00:00
|
|
|
&& (cmd == SIOCAIFADDR)
|
|
|
|
&& (ifra->ifra_dstaddr.sin_addr.s_addr
|
|
|
|
== INADDR_ANY)) {
|
1995-07-17 15:15:15 +00:00
|
|
|
return EDESTADDRREQ;
|
1995-04-25 19:50:20 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
if (cmd == SIOCDIFADDR && ia == 0)
|
|
|
|
return (EADDRNOTAVAIL);
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case SIOCSIFADDR:
|
|
|
|
case SIOCSIFNETMASK:
|
|
|
|
case SIOCSIFDSTADDR:
|
2001-09-12 08:38:13 +00:00
|
|
|
if (td && (error = suser_td(td)) != 0)
|
1997-04-27 20:01:29 +00:00
|
|
|
return error;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
if (ifp == 0)
|
1998-12-07 05:41:10 +00:00
|
|
|
return (EADDRNOTAVAIL);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (ia == (struct in_ifaddr *)0) {
|
1996-12-13 21:29:07 +00:00
|
|
|
ia = (struct in_ifaddr *)
|
2000-12-08 21:51:06 +00:00
|
|
|
malloc(sizeof *ia, M_IFADDR, M_WAITOK | M_ZERO);
|
1996-12-13 21:29:07 +00:00
|
|
|
if (ia == (struct in_ifaddr *)NULL)
|
1994-05-24 10:09:53 +00:00
|
|
|
return (ENOBUFS);
|
1996-04-07 06:59:52 +00:00
|
|
|
/*
|
|
|
|
* Protect from ipintr() traversing address list
|
|
|
|
* while we're modifying it.
|
|
|
|
*/
|
|
|
|
s = splnet();
|
1996-12-13 21:29:07 +00:00
|
|
|
|
|
|
|
TAILQ_INSERT_TAIL(&in_ifaddrhead, ia, ia_link);
|
|
|
|
ifa = &ia->ia_ifa;
|
|
|
|
TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
|
|
|
|
|
|
|
|
ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
|
|
ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
|
|
|
|
ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask;
|
1994-05-24 10:09:53 +00:00
|
|
|
ia->ia_sockmask.sin_len = 8;
|
|
|
|
if (ifp->if_flags & IFF_BROADCAST) {
|
|
|
|
ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr);
|
|
|
|
ia->ia_broadaddr.sin_family = AF_INET;
|
|
|
|
}
|
|
|
|
ia->ia_ifp = ifp;
|
1995-04-26 18:10:58 +00:00
|
|
|
if (!(ifp->if_flags & IFF_LOOPBACK))
|
1994-05-24 10:09:53 +00:00
|
|
|
in_interfaces++;
|
1996-04-07 06:59:52 +00:00
|
|
|
splx(s);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCSIFBRDADDR:
|
2001-09-12 08:38:13 +00:00
|
|
|
if (td && (error = suser_td(td)) != 0)
|
1997-04-27 20:01:29 +00:00
|
|
|
return error;
|
1994-05-24 10:09:53 +00:00
|
|
|
/* FALLTHROUGH */
|
|
|
|
|
|
|
|
case SIOCGIFADDR:
|
|
|
|
case SIOCGIFNETMASK:
|
|
|
|
case SIOCGIFDSTADDR:
|
|
|
|
case SIOCGIFBRDADDR:
|
|
|
|
if (ia == (struct in_ifaddr *)0)
|
|
|
|
return (EADDRNOTAVAIL);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
|
|
|
|
case SIOCGIFADDR:
|
|
|
|
*((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCGIFBRDADDR:
|
|
|
|
if ((ifp->if_flags & IFF_BROADCAST) == 0)
|
|
|
|
return (EINVAL);
|
|
|
|
*((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCGIFDSTADDR:
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
|
|
|
|
return (EINVAL);
|
|
|
|
*((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCGIFNETMASK:
|
|
|
|
*((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCSIFDSTADDR:
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
|
|
|
|
return (EINVAL);
|
|
|
|
oldaddr = ia->ia_dstaddr;
|
|
|
|
ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr;
|
|
|
|
if (ifp->if_ioctl && (error = (*ifp->if_ioctl)
|
|
|
|
(ifp, SIOCSIFDSTADDR, (caddr_t)ia))) {
|
|
|
|
ia->ia_dstaddr = oldaddr;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
if (ia->ia_flags & IFA_ROUTE) {
|
|
|
|
ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr;
|
|
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
|
|
|
|
ia->ia_ifa.ifa_dstaddr =
|
|
|
|
(struct sockaddr *)&ia->ia_dstaddr;
|
|
|
|
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCSIFBRDADDR:
|
|
|
|
if ((ifp->if_flags & IFF_BROADCAST) == 0)
|
|
|
|
return (EINVAL);
|
|
|
|
ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCSIFADDR:
|
|
|
|
return (in_ifinit(ifp, ia,
|
|
|
|
(struct sockaddr_in *) &ifr->ifr_addr, 1));
|
|
|
|
|
|
|
|
case SIOCSIFNETMASK:
|
|
|
|
i = ifra->ifra_addr.sin_addr.s_addr;
|
|
|
|
ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr = i);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCAIFADDR:
|
|
|
|
maskIsNew = 0;
|
|
|
|
hostIsNew = 1;
|
|
|
|
error = 0;
|
|
|
|
if (ia->ia_addr.sin_family == AF_INET) {
|
|
|
|
if (ifra->ifra_addr.sin_len == 0) {
|
|
|
|
ifra->ifra_addr = ia->ia_addr;
|
|
|
|
hostIsNew = 0;
|
|
|
|
} else if (ifra->ifra_addr.sin_addr.s_addr ==
|
|
|
|
ia->ia_addr.sin_addr.s_addr)
|
|
|
|
hostIsNew = 0;
|
|
|
|
}
|
|
|
|
if (ifra->ifra_mask.sin_len) {
|
|
|
|
in_ifscrub(ifp, ia);
|
|
|
|
ia->ia_sockmask = ifra->ifra_mask;
|
|
|
|
ia->ia_subnetmask =
|
|
|
|
ntohl(ia->ia_sockmask.sin_addr.s_addr);
|
|
|
|
maskIsNew = 1;
|
|
|
|
}
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) &&
|
|
|
|
(ifra->ifra_dstaddr.sin_family == AF_INET)) {
|
|
|
|
in_ifscrub(ifp, ia);
|
|
|
|
ia->ia_dstaddr = ifra->ifra_dstaddr;
|
|
|
|
maskIsNew = 1; /* We lie; but the effect's the same */
|
|
|
|
}
|
|
|
|
if (ifra->ifra_addr.sin_family == AF_INET &&
|
|
|
|
(hostIsNew || maskIsNew))
|
|
|
|
error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0);
|
|
|
|
if ((ifp->if_flags & IFF_BROADCAST) &&
|
|
|
|
(ifra->ifra_broadaddr.sin_family == AF_INET))
|
|
|
|
ia->ia_broadaddr = ifra->ifra_broadaddr;
|
|
|
|
return (error);
|
|
|
|
|
|
|
|
case SIOCDIFADDR:
|
net/route.c:
A route generated from an RTF_CLONING route had the RTF_WASCLONED flag
set but did not have a reference to the parent route, as documented in
the rtentry(9) manpage. This prevented such routes from being deleted
when their parent route is deleted.
Now, for example, if you delete an IP address from a network interface,
all ARP entries that were cloned from this interface route are flushed.
This also has an impact on netstat(1) output. Previously, dynamically
created ARP cache entries (RTF_STATIC flag is unset) were displayed as
part of the routing table display (-r). Now, they are only printed if
the -a option is given.
netinet/in.c, netinet/in_rmx.c:
When address is removed from an interface, also delete all routes that
point to this interface and address. Previously, for example, if you
changed the address on an interface, outgoing IP datagrams might still
use the old address. The only solution was to delete and re-add some
routes. (The problem is easily observed with the route(8) command.)
Note, that if the socket was already bound to the local address before
this address is removed, new datagrams generated from this socket will
still be sent from the old address.
PR: kern/20785, kern/21914
Reviewed by: wollman (the idea)
2001-03-15 14:52:12 +00:00
|
|
|
/*
|
|
|
|
* in_ifscrub kills the interface route.
|
|
|
|
*/
|
1994-05-24 10:09:53 +00:00
|
|
|
in_ifscrub(ifp, ia);
|
net/route.c:
A route generated from an RTF_CLONING route had the RTF_WASCLONED flag
set but did not have a reference to the parent route, as documented in
the rtentry(9) manpage. This prevented such routes from being deleted
when their parent route is deleted.
Now, for example, if you delete an IP address from a network interface,
all ARP entries that were cloned from this interface route are flushed.
This also has an impact on netstat(1) output. Previously, dynamically
created ARP cache entries (RTF_STATIC flag is unset) were displayed as
part of the routing table display (-r). Now, they are only printed if
the -a option is given.
netinet/in.c, netinet/in_rmx.c:
When address is removed from an interface, also delete all routes that
point to this interface and address. Previously, for example, if you
changed the address on an interface, outgoing IP datagrams might still
use the old address. The only solution was to delete and re-add some
routes. (The problem is easily observed with the route(8) command.)
Note, that if the socket was already bound to the local address before
this address is removed, new datagrams generated from this socket will
still be sent from the old address.
PR: kern/20785, kern/21914
Reviewed by: wollman (the idea)
2001-03-15 14:52:12 +00:00
|
|
|
/*
|
|
|
|
* in_ifadown gets rid of all the rest of
|
|
|
|
* the routes. This is not quite the right
|
|
|
|
* thing to do, but at least if we are running
|
|
|
|
* a routing process they will come back.
|
|
|
|
*/
|
2001-05-11 14:37:34 +00:00
|
|
|
in_ifadown(&ia->ia_ifa, 1);
|
2001-08-04 17:10:14 +00:00
|
|
|
/*
|
|
|
|
* XXX horrible hack to detect that we are being called
|
|
|
|
* from if_detach()
|
|
|
|
*/
|
2001-09-06 02:40:43 +00:00
|
|
|
if (ifaddr_byindex(ifp->if_index) != NULL) {
|
2001-08-04 17:10:14 +00:00
|
|
|
in_pcbpurgeif0(LIST_FIRST(ripcbinfo.listhead), ifp);
|
|
|
|
in_pcbpurgeif0(LIST_FIRST(udbinfo.listhead), ifp);
|
|
|
|
}
|
net/route.c:
A route generated from an RTF_CLONING route had the RTF_WASCLONED flag
set but did not have a reference to the parent route, as documented in
the rtentry(9) manpage. This prevented such routes from being deleted
when their parent route is deleted.
Now, for example, if you delete an IP address from a network interface,
all ARP entries that were cloned from this interface route are flushed.
This also has an impact on netstat(1) output. Previously, dynamically
created ARP cache entries (RTF_STATIC flag is unset) were displayed as
part of the routing table display (-r). Now, they are only printed if
the -a option is given.
netinet/in.c, netinet/in_rmx.c:
When address is removed from an interface, also delete all routes that
point to this interface and address. Previously, for example, if you
changed the address on an interface, outgoing IP datagrams might still
use the old address. The only solution was to delete and re-add some
routes. (The problem is easily observed with the route(8) command.)
Note, that if the socket was already bound to the local address before
this address is removed, new datagrams generated from this socket will
still be sent from the old address.
PR: kern/20785, kern/21914
Reviewed by: wollman (the idea)
2001-03-15 14:52:12 +00:00
|
|
|
|
1996-04-07 06:59:52 +00:00
|
|
|
/*
|
|
|
|
* Protect from ipintr() traversing address list
|
|
|
|
* while we're modifying it.
|
|
|
|
*/
|
|
|
|
s = splnet();
|
|
|
|
|
1996-12-13 21:29:07 +00:00
|
|
|
ifa = &ia->ia_ifa;
|
|
|
|
TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
|
1994-05-24 10:09:53 +00:00
|
|
|
oia = ia;
|
1996-12-13 21:29:07 +00:00
|
|
|
TAILQ_REMOVE(&in_ifaddrhead, oia, ia_link);
|
1997-01-13 21:26:53 +00:00
|
|
|
IFAFREE(&oia->ia_ifa);
|
1996-04-07 06:59:52 +00:00
|
|
|
splx(s);
|
1994-05-24 10:09:53 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
if (ifp == 0 || ifp->if_ioctl == 0)
|
|
|
|
return (EOPNOTSUPP);
|
|
|
|
return ((*ifp->if_ioctl)(ifp, cmd, data));
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1999-12-22 19:13:38 +00:00
|
|
|
/*
|
|
|
|
* SIOC[GAD]LIFADDR.
|
|
|
|
* SIOCGLIFADDR: get first address. (?!?)
|
|
|
|
* SIOCGLIFADDR with IFLR_PREFIX:
|
|
|
|
* get first address that matches the specified prefix.
|
|
|
|
* SIOCALIFADDR: add the specified address.
|
|
|
|
* SIOCALIFADDR with IFLR_PREFIX:
|
|
|
|
* EINVAL since we can't deduce hostid part of the address.
|
|
|
|
* SIOCDLIFADDR: delete the specified address.
|
|
|
|
* SIOCDLIFADDR with IFLR_PREFIX:
|
|
|
|
* delete the first address that matches the specified prefix.
|
|
|
|
* return values:
|
|
|
|
* EINVAL on invalid parameters
|
|
|
|
* EADDRNOTAVAIL on prefix match failed/specified address not found
|
|
|
|
* other values may be returned from in_ioctl()
|
|
|
|
*/
|
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
in_lifaddr_ioctl(so, cmd, data, ifp, td)
|
1999-12-22 19:13:38 +00:00
|
|
|
struct socket *so;
|
|
|
|
u_long cmd;
|
|
|
|
caddr_t data;
|
|
|
|
struct ifnet *ifp;
|
2001-09-12 08:38:13 +00:00
|
|
|
struct thread *td;
|
1999-12-22 19:13:38 +00:00
|
|
|
{
|
|
|
|
struct if_laddrreq *iflr = (struct if_laddrreq *)data;
|
|
|
|
struct ifaddr *ifa;
|
|
|
|
|
|
|
|
/* sanity checks */
|
|
|
|
if (!data || !ifp) {
|
|
|
|
panic("invalid argument to in_lifaddr_ioctl");
|
|
|
|
/*NOTRECHED*/
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCGLIFADDR:
|
|
|
|
/* address must be specified on GET with IFLR_PREFIX */
|
|
|
|
if ((iflr->flags & IFLR_PREFIX) == 0)
|
|
|
|
break;
|
|
|
|
/*FALLTHROUGH*/
|
|
|
|
case SIOCALIFADDR:
|
|
|
|
case SIOCDLIFADDR:
|
|
|
|
/* address must be specified on ADD and DELETE */
|
2000-01-13 14:52:53 +00:00
|
|
|
if (iflr->addr.ss_family != AF_INET)
|
1999-12-22 19:13:38 +00:00
|
|
|
return EINVAL;
|
2000-01-13 14:52:53 +00:00
|
|
|
if (iflr->addr.ss_len != sizeof(struct sockaddr_in))
|
1999-12-22 19:13:38 +00:00
|
|
|
return EINVAL;
|
|
|
|
/* XXX need improvement */
|
2000-01-13 14:52:53 +00:00
|
|
|
if (iflr->dstaddr.ss_family
|
|
|
|
&& iflr->dstaddr.ss_family != AF_INET)
|
1999-12-22 19:13:38 +00:00
|
|
|
return EINVAL;
|
2000-01-13 14:52:53 +00:00
|
|
|
if (iflr->dstaddr.ss_family
|
|
|
|
&& iflr->dstaddr.ss_len != sizeof(struct sockaddr_in))
|
1999-12-22 19:13:38 +00:00
|
|
|
return EINVAL;
|
|
|
|
break;
|
|
|
|
default: /*shouldn't happen*/
|
|
|
|
return EOPNOTSUPP;
|
|
|
|
}
|
|
|
|
if (sizeof(struct in_addr) * 8 < iflr->prefixlen)
|
|
|
|
return EINVAL;
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCALIFADDR:
|
|
|
|
{
|
|
|
|
struct in_aliasreq ifra;
|
|
|
|
|
|
|
|
if (iflr->flags & IFLR_PREFIX)
|
|
|
|
return EINVAL;
|
|
|
|
|
|
|
|
/* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
|
|
|
|
bzero(&ifra, sizeof(ifra));
|
|
|
|
bcopy(iflr->iflr_name, ifra.ifra_name,
|
|
|
|
sizeof(ifra.ifra_name));
|
|
|
|
|
2000-01-13 14:52:53 +00:00
|
|
|
bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len);
|
1999-12-22 19:13:38 +00:00
|
|
|
|
2000-01-13 14:52:53 +00:00
|
|
|
if (iflr->dstaddr.ss_family) { /*XXX*/
|
1999-12-22 19:13:38 +00:00
|
|
|
bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
|
2000-01-13 14:52:53 +00:00
|
|
|
iflr->dstaddr.ss_len);
|
1999-12-22 19:13:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ifra.ifra_mask.sin_family = AF_INET;
|
|
|
|
ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in);
|
|
|
|
in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen);
|
|
|
|
|
2001-09-12 08:38:13 +00:00
|
|
|
return in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td);
|
1999-12-22 19:13:38 +00:00
|
|
|
}
|
|
|
|
case SIOCGLIFADDR:
|
|
|
|
case SIOCDLIFADDR:
|
|
|
|
{
|
|
|
|
struct in_ifaddr *ia;
|
|
|
|
struct in_addr mask, candidate, match;
|
|
|
|
struct sockaddr_in *sin;
|
|
|
|
int cmp;
|
|
|
|
|
|
|
|
bzero(&mask, sizeof(mask));
|
|
|
|
if (iflr->flags & IFLR_PREFIX) {
|
|
|
|
/* lookup a prefix rather than address. */
|
|
|
|
in_len2mask(&mask, iflr->prefixlen);
|
|
|
|
|
|
|
|
sin = (struct sockaddr_in *)&iflr->addr;
|
|
|
|
match.s_addr = sin->sin_addr.s_addr;
|
|
|
|
match.s_addr &= mask.s_addr;
|
|
|
|
|
|
|
|
/* if you set extra bits, that's wrong */
|
|
|
|
if (match.s_addr != sin->sin_addr.s_addr)
|
|
|
|
return EINVAL;
|
|
|
|
|
|
|
|
cmp = 1;
|
|
|
|
} else {
|
|
|
|
if (cmd == SIOCGLIFADDR) {
|
|
|
|
/* on getting an address, take the 1st match */
|
|
|
|
cmp = 0; /*XXX*/
|
|
|
|
} else {
|
|
|
|
/* on deleting an address, do exact match */
|
|
|
|
in_len2mask(&mask, 32);
|
|
|
|
sin = (struct sockaddr_in *)&iflr->addr;
|
|
|
|
match.s_addr = sin->sin_addr.s_addr;
|
|
|
|
|
|
|
|
cmp = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
|
|
continue;
|
|
|
|
if (!cmp)
|
|
|
|
break;
|
|
|
|
candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr;
|
|
|
|
candidate.s_addr &= mask.s_addr;
|
|
|
|
if (candidate.s_addr == match.s_addr)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (!ifa)
|
|
|
|
return EADDRNOTAVAIL;
|
|
|
|
ia = (struct in_ifaddr *)ifa;
|
|
|
|
|
|
|
|
if (cmd == SIOCGLIFADDR) {
|
|
|
|
/* fill in the if_laddrreq structure */
|
|
|
|
bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len);
|
|
|
|
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
|
|
|
|
bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
|
|
|
|
ia->ia_dstaddr.sin_len);
|
|
|
|
} else
|
|
|
|
bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
|
|
|
|
|
|
|
|
iflr->prefixlen =
|
|
|
|
in_mask2len(&ia->ia_sockmask.sin_addr);
|
|
|
|
|
|
|
|
iflr->flags = 0; /*XXX*/
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
struct in_aliasreq ifra;
|
|
|
|
|
|
|
|
/* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
|
|
|
|
bzero(&ifra, sizeof(ifra));
|
|
|
|
bcopy(iflr->iflr_name, ifra.ifra_name,
|
|
|
|
sizeof(ifra.ifra_name));
|
|
|
|
|
|
|
|
bcopy(&ia->ia_addr, &ifra.ifra_addr,
|
|
|
|
ia->ia_addr.sin_len);
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
|
|
|
|
bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
|
|
|
|
ia->ia_dstaddr.sin_len);
|
|
|
|
}
|
|
|
|
bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr,
|
|
|
|
ia->ia_sockmask.sin_len);
|
|
|
|
|
|
|
|
return in_control(so, SIOCDIFADDR, (caddr_t)&ifra,
|
2001-09-12 08:38:13 +00:00
|
|
|
ifp, td);
|
1999-12-22 19:13:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return EOPNOTSUPP; /*just for safety*/
|
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Delete any existing route for an interface.
|
|
|
|
*/
|
1997-02-13 19:46:45 +00:00
|
|
|
void
|
1994-05-24 10:09:53 +00:00
|
|
|
in_ifscrub(ifp, ia)
|
|
|
|
register struct ifnet *ifp;
|
|
|
|
register struct in_ifaddr *ia;
|
|
|
|
{
|
|
|
|
|
|
|
|
if ((ia->ia_flags & IFA_ROUTE) == 0)
|
|
|
|
return;
|
|
|
|
if (ifp->if_flags & (IFF_LOOPBACK|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.
|
|
|
|
*/
|
1995-11-14 20:34:56 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
in_ifinit(ifp, ia, sin, scrub)
|
|
|
|
register struct ifnet *ifp;
|
|
|
|
register struct in_ifaddr *ia;
|
|
|
|
struct sockaddr_in *sin;
|
|
|
|
int scrub;
|
|
|
|
{
|
|
|
|
register u_long i = ntohl(sin->sin_addr.s_addr);
|
|
|
|
struct sockaddr_in oldaddr;
|
1994-08-18 22:36:09 +00:00
|
|
|
int s = splimp(), flags = RTF_UP, error;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
oldaddr = ia->ia_addr;
|
|
|
|
ia->ia_addr = *sin;
|
|
|
|
/*
|
|
|
|
* Give the interface a chance to initialize
|
|
|
|
* if this is its first address,
|
|
|
|
* and to validate the address if necessary.
|
|
|
|
*/
|
|
|
|
if (ifp->if_ioctl &&
|
|
|
|
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) {
|
|
|
|
splx(s);
|
|
|
|
ia->ia_addr = oldaddr;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
splx(s);
|
|
|
|
if (scrub) {
|
|
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
|
|
|
|
in_ifscrub(ifp, ia);
|
|
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
|
|
}
|
|
|
|
if (IN_CLASSA(i))
|
|
|
|
ia->ia_netmask = IN_CLASSA_NET;
|
|
|
|
else if (IN_CLASSB(i))
|
|
|
|
ia->ia_netmask = IN_CLASSB_NET;
|
|
|
|
else
|
|
|
|
ia->ia_netmask = IN_CLASSC_NET;
|
|
|
|
/*
|
|
|
|
* The subnet mask usually includes at least the standard network part,
|
|
|
|
* but may may be smaller in the case of supernetting.
|
|
|
|
* If it is set, we believe it.
|
|
|
|
*/
|
|
|
|
if (ia->ia_subnetmask == 0) {
|
|
|
|
ia->ia_subnetmask = ia->ia_netmask;
|
|
|
|
ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask);
|
|
|
|
} else
|
|
|
|
ia->ia_netmask &= ia->ia_subnetmask;
|
|
|
|
ia->ia_net = i & ia->ia_netmask;
|
|
|
|
ia->ia_subnet = i & ia->ia_subnetmask;
|
|
|
|
in_socktrim(&ia->ia_sockmask);
|
|
|
|
/*
|
|
|
|
* Add route for the network.
|
|
|
|
*/
|
|
|
|
ia->ia_ifa.ifa_metric = ifp->if_metric;
|
|
|
|
if (ifp->if_flags & IFF_BROADCAST) {
|
|
|
|
ia->ia_broadaddr.sin_addr.s_addr =
|
|
|
|
htonl(ia->ia_subnet | ~ia->ia_subnetmask);
|
|
|
|
ia->ia_netbroadcast.s_addr =
|
|
|
|
htonl(ia->ia_net | ~ ia->ia_netmask);
|
|
|
|
} else if (ifp->if_flags & IFF_LOOPBACK) {
|
|
|
|
ia->ia_ifa.ifa_dstaddr = ia->ia_ifa.ifa_addr;
|
|
|
|
flags |= RTF_HOST;
|
|
|
|
} else if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
|
|
if (ia->ia_dstaddr.sin_family != AF_INET)
|
|
|
|
return (0);
|
|
|
|
flags |= RTF_HOST;
|
|
|
|
}
|
|
|
|
if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0)
|
|
|
|
ia->ia_flags |= IFA_ROUTE;
|
2001-06-11 12:39:29 +00:00
|
|
|
/* XXX check if the subnet route points to the same interface */
|
|
|
|
if (error == EEXIST)
|
|
|
|
error = 0;
|
1995-03-23 18:14:41 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* If the interface supports multicast, join the "all hosts"
|
|
|
|
* multicast group on that interface.
|
|
|
|
*/
|
|
|
|
if (ifp->if_flags & IFF_MULTICAST) {
|
|
|
|
struct in_addr addr;
|
|
|
|
|
|
|
|
addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP);
|
|
|
|
in_addmulti(&addr, ifp);
|
|
|
|
}
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return 1 if the address might be a local broadcast address.
|
|
|
|
*/
|
1994-05-25 09:21:21 +00:00
|
|
|
int
|
1994-05-24 10:09:53 +00:00
|
|
|
in_broadcast(in, ifp)
|
|
|
|
struct in_addr in;
|
|
|
|
struct ifnet *ifp;
|
|
|
|
{
|
|
|
|
register struct ifaddr *ifa;
|
|
|
|
u_long t;
|
|
|
|
|
|
|
|
if (in.s_addr == INADDR_BROADCAST ||
|
|
|
|
in.s_addr == INADDR_ANY)
|
|
|
|
return 1;
|
|
|
|
if ((ifp->if_flags & IFF_BROADCAST) == 0)
|
|
|
|
return 0;
|
|
|
|
t = ntohl(in.s_addr);
|
|
|
|
/*
|
|
|
|
* Look through the list of addresses for a match
|
|
|
|
* with a broadcast address.
|
|
|
|
*/
|
|
|
|
#define ia ((struct in_ifaddr *)ifa)
|
2001-03-16 20:00:53 +00:00
|
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
|
1994-05-24 10:09:53 +00:00
|
|
|
if (ifa->ifa_addr->sa_family == AF_INET &&
|
|
|
|
(in.s_addr == ia->ia_broadaddr.sin_addr.s_addr ||
|
|
|
|
in.s_addr == ia->ia_netbroadcast.s_addr ||
|
|
|
|
/*
|
|
|
|
* Check for old-style (host 0) broadcast.
|
|
|
|
*/
|
1996-01-08 20:59:06 +00:00
|
|
|
t == ia->ia_subnet || t == ia->ia_net) &&
|
|
|
|
/*
|
|
|
|
* Check for an all one subnetmask. These
|
|
|
|
* only exist when an interface gets a secondary
|
|
|
|
* address.
|
|
|
|
*/
|
|
|
|
ia->ia_subnetmask != (u_long)0xffffffff)
|
1994-05-24 10:09:53 +00:00
|
|
|
return 1;
|
|
|
|
return (0);
|
|
|
|
#undef ia
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Add an address to the list of IP multicast addresses for a given interface.
|
|
|
|
*/
|
|
|
|
struct in_multi *
|
|
|
|
in_addmulti(ap, ifp)
|
|
|
|
register struct in_addr *ap;
|
|
|
|
register struct ifnet *ifp;
|
|
|
|
{
|
|
|
|
register struct in_multi *inm;
|
1997-01-13 21:26:53 +00:00
|
|
|
int error;
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
struct ifmultiaddr *ifma;
|
1994-05-24 10:09:53 +00:00
|
|
|
int s = splnet();
|
|
|
|
|
|
|
|
/*
|
1997-01-13 21:26:53 +00:00
|
|
|
* Call generic routine to add membership or increment
|
|
|
|
* refcount. It wants addresses in the form of a sockaddr,
|
|
|
|
* so we build one here (being careful to zero the unused bytes).
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
1997-01-13 21:26:53 +00:00
|
|
|
bzero(&sin, sizeof sin);
|
|
|
|
sin.sin_family = AF_INET;
|
|
|
|
sin.sin_len = sizeof sin;
|
|
|
|
sin.sin_addr = *ap;
|
|
|
|
error = if_addmulti(ifp, (struct sockaddr *)&sin, &ifma);
|
|
|
|
if (error) {
|
|
|
|
splx(s);
|
|
|
|
return 0;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1995-03-23 18:14:41 +00:00
|
|
|
|
1997-01-13 21:26:53 +00:00
|
|
|
/*
|
|
|
|
* If ifma->ifma_protospec is null, then if_addmulti() created
|
|
|
|
* a new record. Otherwise, we are done.
|
|
|
|
*/
|
2000-08-19 22:10:10 +00:00
|
|
|
if (ifma->ifma_protospec != 0) {
|
|
|
|
splx(s);
|
1997-01-13 21:26:53 +00:00
|
|
|
return ifma->ifma_protospec;
|
2000-08-19 22:10:10 +00:00
|
|
|
}
|
1997-01-13 21:26:53 +00:00
|
|
|
|
|
|
|
/* XXX - if_addmulti uses M_WAITOK. Can this really be called
|
|
|
|
at interrupt time? If so, need to fix if_addmulti. XXX */
|
2000-12-08 21:51:06 +00:00
|
|
|
inm = (struct in_multi *)malloc(sizeof(*inm), M_IPMADDR,
|
|
|
|
M_NOWAIT | M_ZERO);
|
1997-01-13 21:26:53 +00:00
|
|
|
if (inm == NULL) {
|
|
|
|
splx(s);
|
|
|
|
return (NULL);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1997-01-13 21:26:53 +00:00
|
|
|
|
|
|
|
inm->inm_addr = *ap;
|
|
|
|
inm->inm_ifp = ifp;
|
|
|
|
inm->inm_ifma = ifma;
|
|
|
|
ifma->ifma_protospec = inm;
|
|
|
|
LIST_INSERT_HEAD(&in_multihead, inm, inm_link);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Let IGMP know that we have joined a new IP multicast group.
|
|
|
|
*/
|
|
|
|
igmp_joingroup(inm);
|
1994-05-24 10:09:53 +00:00
|
|
|
splx(s);
|
|
|
|
return (inm);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Delete a multicast address record.
|
|
|
|
*/
|
1994-05-25 09:21:21 +00:00
|
|
|
void
|
1994-05-24 10:09:53 +00:00
|
|
|
in_delmulti(inm)
|
|
|
|
register struct in_multi *inm;
|
|
|
|
{
|
1997-01-13 21:26:53 +00:00
|
|
|
struct ifmultiaddr *ifma = inm->inm_ifma;
|
1999-04-24 12:28:51 +00:00
|
|
|
struct in_multi my_inm;
|
1994-05-24 10:09:53 +00:00
|
|
|
int s = splnet();
|
|
|
|
|
1999-04-24 12:28:51 +00:00
|
|
|
my_inm.inm_ifp = NULL ; /* don't send the leave msg */
|
1997-01-13 21:26:53 +00:00
|
|
|
if (ifma->ifma_refcount == 1) {
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* No remaining claims to this record; let IGMP know that
|
|
|
|
* we are leaving the multicast group.
|
1999-04-24 12:28:51 +00:00
|
|
|
* But do it after the if_delmulti() which might reset
|
|
|
|
* the interface and nuke the packet.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
1999-04-24 12:28:51 +00:00
|
|
|
my_inm = *inm ;
|
1997-01-13 21:26:53 +00:00
|
|
|
ifma->ifma_protospec = 0;
|
|
|
|
LIST_REMOVE(inm, inm_link);
|
1994-05-24 10:09:53 +00:00
|
|
|
free(inm, M_IPMADDR);
|
|
|
|
}
|
1997-01-13 21:26:53 +00:00
|
|
|
/* XXX - should be separate API for when we have an ifma? */
|
|
|
|
if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
|
1999-04-24 12:28:51 +00:00
|
|
|
if (my_inm.inm_ifp != NULL)
|
|
|
|
igmp_leavegroup(&my_inm);
|
1994-05-24 10:09:53 +00:00
|
|
|
splx(s);
|
|
|
|
}
|