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NetBSD/sys/compat/darwin/darwin_route.c
david bf4bf03db8 Refine bounds check code.
2004-11-07 04:08:37 +00:00

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8.3 KiB
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/* $NetBSD: darwin_route.c,v 1.8 2004/11/07 04:08:37 david Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: darwin_route.c,v 1.8 2004/11/07 04:08:37 david Exp $");
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <net/if.h>
#include <compat/darwin/darwin_socket.h>
#include <compat/darwin/darwin_route.h>
inline int copyout_sockaddr(struct sockaddr *, char **, size_t *, size_t);
#define ALIGN(a) (((a) + 3) & ~0x3UL)
int
darwin_ifaddrs(af, dst, sizep)
int af;
char *dst;
size_t *sizep;
{
struct darwin_if_msghdr dim;
struct ifnet *ifp;
int error;
int index = 1;
size_t size = 0;
size_t maxsize = *sizep;
af = darwin_to_native_af[af];
TAILQ_FOREACH(ifp, &ifnet, if_list) {
struct ifaddr *ifa;
struct sockaddr_dl *laddr = NULL;
struct sockaddr_storage dladdr;
/*
* Find the link layer info as it is needed
* for computing darwin_if_msghdr's dim_len
*/
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) {
if ((ifa->ifa_addr) &&
(ifa->ifa_addr->sa_family == AF_LINK)) {
laddr = (struct sockaddr_dl *)ifa->ifa_addr;
break;
}
}
if (laddr == NULL) {
#ifdef DEBUG_DARWIN
printf("darwin_ifaddrs: cannot find link address\n");
#endif
continue;
}
error = native_to_darwin_sockaddr((struct sockaddr *)laddr,
&dladdr);
if (error)
return error;
dim.dim_len = sizeof(dim) + ALIGN(dladdr.ss_len);
dim.dim_vers = DARWIN_RTM_VERSION;
dim.dim_type = DARWIN_RTM_IFINFO;
dim.dim_addrs = DARWIN_RTA_IFP;
dim.dim_flags = ifp->if_flags & 0xffff;
dim.dim_index = index++;
dim.dim_data.did_type = ifp->if_data.ifi_type; /* XXX */
dim.dim_data.did_typelen = 0 ;/* XXX */
dim.dim_data.did_physical = 0; /* XXX */
dim.dim_data.did_addrlen = ifp->if_data.ifi_addrlen;
dim.dim_data.did_hdrlen = ifp->if_data.ifi_hdrlen;
dim.dim_data.did_recquota = 0; /* XXX */
dim.dim_data.did_xmitquota = 0; /* XXX */
dim.dim_data.did_mtu = ifp->if_data.ifi_mtu;
dim.dim_data.did_metric = ifp->if_data.ifi_metric;
dim.dim_data.did_baudrate = ifp->if_data.ifi_baudrate;
dim.dim_data.did_ipackets = ifp->if_data.ifi_ipackets;
dim.dim_data.did_ierrors = ifp->if_data.ifi_ierrors;
dim.dim_data.did_opackets = ifp->if_data.ifi_opackets;
dim.dim_data.did_oerrors = ifp->if_data.ifi_oerrors;
dim.dim_data.did_collisions = ifp->if_data.ifi_collisions;
dim.dim_data.did_ibytes = ifp->if_data.ifi_ibytes;
dim.dim_data.did_obytes = ifp->if_data.ifi_obytes;
dim.dim_data.did_imcasts = ifp->if_data.ifi_imcasts;
dim.dim_data.did_omcasts = ifp->if_data.ifi_omcasts;
dim.dim_data.did_iqdrops = ifp->if_data.ifi_iqdrops;
dim.dim_data.did_noproto = ifp->if_data.ifi_noproto;
dim.dim_data.did_lastchange.tv_sec =
ifp->if_data.ifi_lastchange.tv_sec;
dim.dim_data.did_lastchange.tv_usec =
ifp->if_data.ifi_lastchange.tv_usec;
dim.dim_data.did_default_proto = 0; /* XXX */
dim.dim_data.did_hwassist = 0; /* XXX */
size += sizeof(dim);
if (dst && (size <= maxsize)) {
if ((error = copyout(&dim, dst, sizeof(dim))) != 0)
return error;
dst += sizeof(dim);
}
/* Copy the link sockaddr. */
size += ALIGN(dladdr.ss_len);
if (dst && (size <= maxsize)) {
if ((error = copyout(&dladdr, dst, dladdr.ss_len)) != 0)
return error;
dst += ALIGN(dladdr.ss_len);
}
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) {
struct darwin_ifa_msghdr diam;
int iaf;
if (ifa->ifa_addr) {
iaf = ifa->ifa_addr->sa_family;
if ((af != 0) && (iaf != af))
continue;
if (iaf > AF_MAX)
continue;
if (iaf == 0)
continue;
if (native_to_darwin_af[iaf] == 0)
continue;
/* Already handled earlier */
if (iaf == AF_LINK)
continue;
}
bzero(&diam, sizeof(diam));
diam.diam_len = sizeof(diam);
diam.diam_vers = DARWIN_RTM_VERSION;
diam.diam_type = DARWIN_RTM_NEWADDR;
/*
* XXX the following code assumes that
* Darwin sockaddr have the same size as
* the original.
*/
if (ifa->ifa_addr) {
diam.diam_addrs |= DARWIN_RTA_IFA;
diam.diam_len += ALIGN(ifa->ifa_addr->sa_len);
}
if (ifa->ifa_netmask) {
diam.diam_addrs |= DARWIN_RTA_NETMASK;
diam.diam_len +=
ALIGN(ifa->ifa_netmask->sa_len);
}
if ((ifa->ifa_dstaddr != NULL) &&
(ifp->if_flags & IFF_POINTOPOINT)) {
diam.diam_addrs |= DARWIN_RTA_DST;
diam.diam_len +=
ALIGN(ifa->ifa_dstaddr->sa_len);
}
if ((ifa->ifa_broadaddr != NULL) &&
(ifp->if_flags & IFF_BROADCAST)) {
diam.diam_addrs |= DARWIN_RTA_BRD;
diam.diam_len +=
ALIGN(ifa->ifa_broadaddr->sa_len);
}
diam.diam_flags = (int)ifa->ifa_flags;
diam.diam_index = dim.dim_index;
diam.diam_metric = ifa->ifa_metric;
size += sizeof(diam);
if (dst && (size <= maxsize)) {
error = copyout(&diam, dst, sizeof(diam));
if (error != 0)
return error;
dst += sizeof(diam);
}
/*
* Interface netmask
* We sometime lack the af in native version:
* copy it from ifa_addr.
*/
if (diam.diam_addrs & DARWIN_RTA_NETMASK) {
struct sockaddr_storage ss;
memcpy(&ss, ifa->ifa_netmask,
ifa->ifa_netmask->sa_len);
if ((ss.ss_family == 0) &&
(ifa->ifa_addr != NULL) &&
(ifa->ifa_addr->sa_family != 0))
ss.ss_family =
ifa->ifa_addr->sa_family;
if ((error = copyout_sockaddr(
(struct sockaddr *)&ss, &dst,
&size, maxsize)) != 0)
return error;
}
/* Interface address */
if (diam.diam_addrs & DARWIN_RTA_IFA)
if ((error = copyout_sockaddr(ifa->ifa_addr,
&dst, &size, maxsize)) != 0)
return error;
/* Interface remote address */
if (diam.diam_addrs & DARWIN_RTA_DST)
if ((error = copyout_sockaddr(ifa->ifa_dstaddr,
&dst, &size, maxsize)) != 0)
return error;
/* Interface broadcast address */
if (diam.diam_addrs & DARWIN_RTA_BRD)
if ((error =
copyout_sockaddr(ifa->ifa_broadaddr,
&dst, &size, maxsize)) != 0)
return error;
}
}
*sizep = size;
if (dst && (size > maxsize))
return ENOMEM;
return 0;
}
inline int
copyout_sockaddr(sap, dstp, sizep, maxsize)
struct sockaddr *sap;
char **dstp;
size_t *sizep;
size_t maxsize;
{
struct sockaddr_storage ss;
size_t len;
int error;
error = native_to_darwin_sockaddr(sap, &ss);
if (error)
return error;
len = ss.ss_len;
*sizep += ALIGN(len);
if (*dstp && (*sizep <= maxsize)) {
if ((error = copyout(&ss, *dstp, len)) != 0)
return error;
*dstp += ALIGN(len);
}
return 0;
}
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