/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1983, 1993
* The Regents of the University of California. 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.
* 3. 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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "ifconfig.h"
static struct in_aliasreq in_addreq;
static struct ifreq in_ridreq;
static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/
extern char *f_inet, *f_addr;
static void
in_status(int s __unused, const struct ifaddrs *ifa)
{
struct sockaddr_in *sin, null_sin;
int error, n_flags;
memset(&null_sin, 0, sizeof(null_sin));
sin = (struct sockaddr_in *)ifa->ifa_addr;
if (sin == NULL)
return;
if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0)
n_flags = 0;
else if (f_addr != NULL && strcmp(f_addr, "host") == 0)
n_flags = NI_NOFQDN;
else
n_flags = NI_NUMERICHOST;
error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf,
sizeof(addr_buf), NULL, 0, n_flags);
if (error)
inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf));
printf("\tinet %s", addr_buf);
if (ifa->ifa_flags & IFF_POINTOPOINT) {
sin = (struct sockaddr_in *)ifa->ifa_dstaddr;
if (sin == NULL)
sin = &null_sin;
printf(" --> %s", inet_ntoa(sin->sin_addr));
}
sin = (struct sockaddr_in *)ifa->ifa_netmask;
if (sin == NULL)
sin = &null_sin;
if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) {
int cidr = 32;
unsigned long smask;
smask = ntohl(sin->sin_addr.s_addr);
while ((smask & 1) == 0) {
smask = smask >> 1;
cidr--;
if (cidr == 0)
break;
}
printf("/%d", cidr);
} else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0)
printf(" netmask %s", inet_ntoa(sin->sin_addr));
else
printf(" netmask 0x%lx", (unsigned long)ntohl(sin->sin_addr.s_addr));
if (ifa->ifa_flags & IFF_BROADCAST) {
sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
if (sin != NULL && sin->sin_addr.s_addr != 0)
printf(" broadcast %s", inet_ntoa(sin->sin_addr));
}
print_vhid(ifa, " ");
putchar('\n');
}
#define SIN(x) ((struct sockaddr_in *) &(x))
static struct sockaddr_in *sintab[] = {
SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr),
SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr)
};
static void
in_getaddr(const char *s, int which)
{
struct sockaddr_in *sin = sintab[which];
struct hostent *hp;
struct netent *np;
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
if (which == ADDR) {
char *p = NULL;
if((p = strrchr(s, '/')) != NULL) {
const char *errstr;
/* address is `name/masklen' */
int masklen;
struct sockaddr_in *min = sintab[MASK];
*p = '\0';
if (!isdigit(*(p + 1)))
errstr = "invalid";
else
masklen = (int)strtonum(p + 1, 0, 32, &errstr);
if (errstr != NULL) {
*p = '/';
errx(1, "%s: bad value (width %s)", s, errstr);
}
min->sin_family = AF_INET;
min->sin_len = sizeof(*min);
min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) &
0xffffffff);
}
}
if (inet_aton(s, &sin->sin_addr))
return;
if ((hp = gethostbyname(s)) != NULL)
bcopy(hp->h_addr, (char *)&sin->sin_addr,
MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
else if ((np = getnetbyname(s)) != NULL)
sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
else
errx(1, "%s: bad value", s);
}
static void
in_status_tunnel(int s)
{
char src[NI_MAXHOST];
char dst[NI_MAXHOST];
struct ifreq ifr;
const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr;
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, name, IFNAMSIZ);
if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
return;
if (sa->sa_family != AF_INET)
return;
if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0)
src[0] = '\0';
if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0)
return;
if (sa->sa_family != AF_INET)
return;
if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0)
dst[0] = '\0';
printf("\ttunnel inet %s --> %s\n", src, dst);
}
static void
in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
{
struct in_aliasreq addreq;
memset(&addreq, 0, sizeof(addreq));
strlcpy(addreq.ifra_name, name, IFNAMSIZ);
memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len);
if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0)
warn("SIOCSIFPHYADDR");
}
static struct afswtch af_inet = {
.af_name = "inet",
.af_af = AF_INET,
.af_status = in_status,
.af_getaddr = in_getaddr,
.af_status_tunnel = in_status_tunnel,
.af_settunnel = in_set_tunnel,
.af_difaddr = SIOCDIFADDR,
.af_aifaddr = SIOCAIFADDR,
.af_ridreq = &in_ridreq,
.af_addreq = &in_addreq,
};
static __constructor void
inet_ctor(void)
{
#ifndef RESCUE
if (!feature_present("inet"))
return;
#endif
af_register(&af_inet);
}
