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cb4c673500
freebsd-skq/usr.sbin/ppp/iface.c
eugen 7f5b337a61 ppp(8): fix code producing debugging logs 
Fix several cases when long buffer is copied to shorter one
using snprintf that results in contents truncation and
clobbering unsaved errno value and creation of misleading logs.

PR:		218517
Approved by:	avg (mentor)
MFC after:	1 month
2018-02-10 17:09:51 +00:00

844 lines
22 KiB
C
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#ifndef NOINET6
#include <netinet6/nd6.h>
#endif
#include <sys/un.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <termios.h>
#include <unistd.h>
#include "layer.h"
#include "defs.h"
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "id.h"
#include "timer.h"
#include "fsm.h"
#include "iplist.h"
#include "lqr.h"
#include "hdlc.h"
#include "throughput.h"
#include "slcompress.h"
#include "descriptor.h"
#include "ncpaddr.h"
#include "ipcp.h"
#include "filter.h"
#include "lcp.h"
#include "ccp.h"
#include "link.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "ipv6cp.h"
#include "ncp.h"
#include "bundle.h"
#include "prompt.h"
#include "iface.h"
#define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
static const struct in6_addr in6mask128 = IN6MASK128;
struct iface *
iface_Create(const char *name)
{
int mib[6], maxtries, err;
size_t needed, namelen;
char *buf, *ptr, *end;
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
struct sockaddr_dl *dl;
struct sockaddr *sa[RTAX_MAX];
struct iface *iface;
struct iface_addr *addr;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = 0;
mib[4] = NET_RT_IFLIST;
mib[5] = 0;
maxtries = 20;
err = 0;
do {
if (maxtries-- == 0 || (err && err != ENOMEM)) {
fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
return NULL;
}
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
strerror(errno));
return NULL;
}
if ((buf = (char *)malloc(needed)) == NULL) {
fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
return NULL;
}
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
err = errno;
free(buf);
buf = NULL;
}
} while (buf == NULL);
ptr = buf;
end = buf + needed;
iface = NULL;
namelen = strlen(name);
while (ptr < end && iface == NULL) {
ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
if (ifm->ifm_type != RTM_IFINFO)
break;
dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
iface = (struct iface *)malloc(sizeof *iface);
if (iface == NULL) {
fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
free(buf);
return NULL;
}
iface->name = strdup(name);
iface->descr = NULL;
iface->index = ifm->ifm_index;
iface->flags = ifm->ifm_flags;
iface->mtu = 0;
iface->addrs = 0;
iface->addr = NULL;
}
ptr += ifm->ifm_msglen; /* First ifa_msghdr */
for (; ptr < end; ptr += ifam->ifam_msglen) {
ifam = (struct ifa_msghdr *)ptr; /* Next if address */
if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
break;
if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
/* Found a configured interface ! */
iface_ParseHdr(ifam, sa);
if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
#ifndef NOINET6
|| sa[RTAX_IFA]->sa_family == AF_INET6
#endif
)) {
/* Record the address */
addr = (struct iface_addr *)
realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
if (addr == NULL)
break;
iface->addr = addr;
addr += iface->addrs;
iface->addrs++;
ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
if (sa[RTAX_BRD])
ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
else
ncpaddr_init(&addr->peer);
}
}
}
}
free(buf);
return iface;
}
static int
iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
{
struct ifaliasreq ifra;
#ifndef NOINET6
struct in6_aliasreq ifra6;
#endif
struct sockaddr_in *me4, *msk4, *peer4;
struct sockaddr_storage ssme, sspeer, ssmsk;
int res, saved_errno;
ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
ncpaddr_getsa(&addr->peer, &sspeer);
res = 0;
switch (ncprange_family(&addr->ifa)) {
case AF_INET:
memset(&ifra, '\0', sizeof ifra);
strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
me4 = (struct sockaddr_in *)&ifra.ifra_addr;
memcpy(me4, &ssme, sizeof *me4);
msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
memcpy(msk4, &ssmsk, sizeof *msk4);
peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
peer4->sin_family = AF_INET;
peer4->sin_len = sizeof(*peer4);
peer4->sin_addr.s_addr = INADDR_NONE;
} else
memcpy(peer4, &sspeer, sizeof *peer4);
res = ID0ioctl(s, SIOCDIFADDR, &ifra);
saved_errno = errno;
if (log_IsKept(LogDEBUG)) {
char buf[NCP_ASCIIBUFFERSIZE];
snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
}
break;
#ifndef NOINET6
case AF_INET6:
memset(&ifra6, '\0', sizeof ifra6);
strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
else
memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
saved_errno = errno;
break;
#endif
}
if (res == -1) {
char dst[NCP_ASCIIBUFFERSIZE];
const char *end =
#ifndef NOINET6
ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
#endif
"";
if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
else {
snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
}
}
return res != -1;
}
static int
iface_addr_Add(const char *name, struct iface_addr *addr, int s)
{
struct ifaliasreq ifra;
#ifndef NOINET6
struct in6_aliasreq ifra6;
#endif
struct sockaddr_in *me4, *msk4, *peer4;
struct sockaddr_storage ssme, sspeer, ssmsk;
int res, saved_errno;
ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
ncpaddr_getsa(&addr->peer, &sspeer);
res = 0;
switch (ncprange_family(&addr->ifa)) {
case AF_INET:
memset(&ifra, '\0', sizeof ifra);
strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
me4 = (struct sockaddr_in *)&ifra.ifra_addr;
memcpy(me4, &ssme, sizeof *me4);
msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
memcpy(msk4, &ssmsk, sizeof *msk4);
peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
peer4->sin_family = AF_INET;
peer4->sin_len = sizeof(*peer4);
peer4->sin_addr.s_addr = INADDR_NONE;
} else
memcpy(peer4, &sspeer, sizeof *peer4);
res = ID0ioctl(s, SIOCAIFADDR, &ifra);
saved_errno = errno;
if (log_IsKept(LogDEBUG)) {
char buf[NCP_ASCIIBUFFERSIZE];
snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
}
break;
#ifndef NOINET6
case AF_INET6:
memset(&ifra6, '\0', sizeof ifra6);
strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
sizeof in6mask128) == 0)
memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
saved_errno = errno;
break;
#endif
}
if (res == -1) {
char dst[NCP_ASCIIBUFFERSIZE];
const char *end =
#ifndef NOINET6
ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
#endif
"";
if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
else {
snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
}
}
return res != -1;
}
int
iface_Name(struct iface *iface, const char *name)
{
struct ifreq ifr;
int s;
char *newname;
if ((newname = strdup(name)) == NULL) {
log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
return 0;
}
if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
free(newname);
return 0;
}
strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
ifr.ifr_data = newname;
if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
name, newname, strerror(errno));
free(newname);
return 0;
}
free(iface->name);
iface->name = newname;
return 1;
}
int
iface_Descr(struct cmdargs const *arg)
{
struct ifreq ifr;
struct iface *iface;
size_t sz, len;
int s, n, ifdescr_maxlen;
char *descr;
sz = sizeof(int);
if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
return 1;
}
if (ifdescr_maxlen < 1) {
log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
return 1;
}
sz = sizeof(char) * ifdescr_maxlen;
if ((descr = malloc(sz)) == NULL) {
log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
return 1;
}
*descr = '\0';
n = arg->argn;
while (n < arg->argc) {
if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
break;
if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
break;
++n;
}
if (len >= sz) {
log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
ifdescr_maxlen-1);
free(descr);
return 1;
}
if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
free(descr);
return 1;
}
iface = arg->bundle->iface;
strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
ifr.ifr_buffer.length = strlen(descr) + 1;
ifr.ifr_buffer.buffer = descr;
if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
descr, strerror(errno));
free(descr);
return 1;
}
free(iface->descr);
iface->descr = descr;
return 0;
}
void
iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
{
int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
unsigned n;
if (iface->addrs) {
inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
for (n = 0; n < iface->addrs; n++) {
af = ncprange_family(&iface->addr[n].ifa);
if (family == 0 || family == af) {
if (!iface->addr[n].system && (how & IFACE_SYSTEM))
continue;
switch (af) {
case AF_INET:
if (inskip) {
inskip = 0;
continue;
}
s = &s4;
break;
#ifndef NOINET6
case AF_INET6:
if (in6skip) {
in6skip = 0;
continue;
}
s = &s6;
break;
#endif
default:
continue;
}
if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
ncp_IfaceAddrDeleted(ncp, iface->addr + n);
bcopy(iface->addr + n + 1, iface->addr + n,
(iface->addrs - n - 1) * sizeof *iface->addr);
iface->addrs--;
n--;
}
}
}
/* Don't bother realloc()ing - we have little to gain */
if (s4)
close(s4);
if (s6)
close(s6);
}
}
int
iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
const struct ncpaddr *peer, int how)
{
int af, removed, s;
unsigned n;
struct ncpaddr ncplocal;
struct iface_addr *addr, newaddr;
af = ncprange_family(ifa);
if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
return 0;
}
ncprange_getaddr(ifa, &ncplocal);
for (n = 0; n < iface->addrs; n++) {
if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
ncpaddr_equal(&iface->addr[n].peer, peer)) {
/* Replace this sockaddr */
if (!(how & IFACE_FORCE_ADD)) {
close(s);
return 0; /* errno = EEXIST; */
}
if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
ncpaddr_equal(&iface->addr[n].peer, peer)) {
close(s);
ncp_IfaceAddrAdded(ncp, iface->addr + n);
return 1; /* Already there */
}
removed = iface_addr_Zap(iface->name, iface->addr + n, s);
if (removed)
ncp_IfaceAddrDeleted(ncp, iface->addr + n);
ncprange_copy(&iface->addr[n].ifa, ifa);
ncpaddr_copy(&iface->addr[n].peer, peer);
if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
if (removed) {
bcopy(iface->addr + n + 1, iface->addr + n,
(iface->addrs - n - 1) * sizeof *iface->addr);
iface->addrs--;
n--;
}
close(s);
return 0;
}
close(s);
ncp_IfaceAddrAdded(ncp, iface->addr + n);
return 1;
}
}
addr = (struct iface_addr *)realloc
(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
if (addr == NULL) {
log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
close(s);
return 0;
}
iface->addr = addr;
ncprange_copy(&newaddr.ifa, ifa);
ncpaddr_copy(&newaddr.peer, peer);
newaddr.system = !!(how & IFACE_SYSTEM);
if (!iface_addr_Add(iface->name, &newaddr, s)) {
close(s);
return 0;
}
if (how & IFACE_ADD_FIRST) {
/* Stuff it at the start of our list */
n = 0;
bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
} else
n = iface->addrs;
iface->addrs++;
memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
close(s);
ncp_IfaceAddrAdded(ncp, iface->addr + n);
return 1;
}
int
iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
{
struct ncpaddr found;
unsigned n;
int res, s;
if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
return 0;
}
for (n = res = 0; n < iface->addrs; n++) {
ncprange_getaddr(&iface->addr[n].ifa, &found);
if (ncpaddr_equal(&found, del)) {
if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
ncp_IfaceAddrDeleted(ncp, iface->addr + n);
bcopy(iface->addr + n + 1, iface->addr + n,
(iface->addrs - n - 1) * sizeof *iface->addr);
iface->addrs--;
res = 1;
}
break;
}
}
close(s);
return res;
}
#define IFACE_ADDFLAGS 1
#define IFACE_DELFLAGS 2
static int
iface_ChangeFlags(const char *ifname, int flags, int how)
{
struct ifreq ifrq;
int s, new_flags;
s = ID0socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
return 0;
}
memset(&ifrq, '\0', sizeof ifrq);
strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
strerror(errno));
close(s);
return 0;
}
#ifdef __FreeBSD__
new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
#else
new_flags = ifrq.ifr_flags & 0xffff;
#endif
if (how == IFACE_ADDFLAGS)
new_flags |= flags;
else
new_flags &= ~flags;
ifrq.ifr_flags = new_flags & 0xffff;
#ifdef __FreeBSD__
ifrq.ifr_flagshigh = new_flags >> 16;
#endif
if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
strerror(errno));
close(s);
return 0;
}
close(s);
return 1; /* Success */
}
int
iface_SetFlags(const char *ifname, int flags)
{
return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
}
int
iface_ClearFlags(const char *ifname, int flags)
{
return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
}
void
iface_Free(struct iface *iface)
{
free(iface->name);
free(iface->descr);
free(iface->addr);
free(iface);
}
void
iface_Destroy(struct iface *iface)
{
struct ifreq ifr;
int s;
if (iface != NULL) {
if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
} else {
strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
iface->name, strerror(errno));
}
iface_Free(iface);
}
}
#define if_entry(x) { IFF_##x, #x }
struct {
int flag;
const char *value;
} if_flags[] = {
if_entry(UP),
if_entry(BROADCAST),
if_entry(DEBUG),
if_entry(LOOPBACK),
if_entry(POINTOPOINT),
if_entry(RUNNING),
if_entry(NOARP),
if_entry(PROMISC),
if_entry(ALLMULTI),
if_entry(OACTIVE),
if_entry(SIMPLEX),
if_entry(LINK0),
if_entry(LINK1),
if_entry(LINK2),
if_entry(MULTICAST),
{ 0, "???" }
};
int
iface_Show(struct cmdargs const *arg)
{
struct ncpaddr ncpaddr;
struct iface *iface = arg->bundle->iface, *current;
unsigned f;
int flags;
#ifndef NOINET6
int scopeid, width;
#endif
struct in_addr mask;
current = iface_Create(iface->name);
flags = iface->flags = current->flags;
iface_Free(current);
prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
if ((if_flags[f].flag & flags)) {
prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
if_flags[f].value);
flags &= ~if_flags[f].flag;
}
#if 0
if (flags)
prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
flags);
#endif
prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
iface->addrs, iface->addrs == 1 ? "" : "es");
for (f = 0; f < iface->addrs; f++) {
ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
switch (ncprange_family(&iface->addr[f].ifa)) {
case AF_INET:
prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
prompt_Printf(arg->prompt, "255.255.255.255");
else
prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
ncprange_getip4mask(&iface->addr[f].ifa, &mask);
prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
break;
#ifndef NOINET6
case AF_INET6:
prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
prompt_Printf(arg->prompt, " --> %s",
ncpaddr_ntoa(&iface->addr[f].peer));
ncprange_getwidth(&iface->addr[f].ifa, &width);
if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
prompt_Printf(arg->prompt, " prefixlen %d", width);
if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
break;
#endif
}
prompt_Printf(arg->prompt, "\n");
}
return 0;
}
void
iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
{
char *wp;
int rtax;
wp = (char *)(ifam + 1);
for (rtax = 0; rtax < RTAX_MAX; rtax++)
if (ifam->ifam_addrs & (1 << rtax)) {
sa[rtax] = (struct sockaddr *)wp;
wp += ROUNDUP(sa[rtax]->sa_len);
} else
sa[rtax] = NULL;
}
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