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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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92ed4e1a24
and thus ifconfig(8) needs recompile, it is a good chance to make parameter checks on SIOCAIFADDR arguments more strict.
213 lines
5.7 KiB
C
213 lines
5.7 KiB
C
/*
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* Copyright (c) 1983, 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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* modification, are permitted provided that the following conditions
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* are met:
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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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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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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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* 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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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <ifaddrs.h>
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#include <netinet/in.h>
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#include <net/if_var.h> /* for struct ifaddr */
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#include <netinet/in_var.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include "ifconfig.h"
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static struct in_aliasreq in_addreq;
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static struct ifreq in_ridreq;
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static void
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in_status(int s __unused, const struct ifaddrs *ifa)
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{
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struct sockaddr_in *sin, null_sin;
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memset(&null_sin, 0, sizeof(null_sin));
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sin = (struct sockaddr_in *)ifa->ifa_addr;
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if (sin == NULL)
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return;
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printf("\tinet %s ", inet_ntoa(sin->sin_addr));
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if (ifa->ifa_flags & IFF_POINTOPOINT) {
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sin = (struct sockaddr_in *)ifa->ifa_dstaddr;
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if (sin == NULL)
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sin = &null_sin;
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printf("--> %s ", inet_ntoa(sin->sin_addr));
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}
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sin = (struct sockaddr_in *)ifa->ifa_netmask;
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if (sin == NULL)
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sin = &null_sin;
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printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
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if (ifa->ifa_flags & IFF_BROADCAST) {
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sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
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if (sin != NULL && sin->sin_addr.s_addr != 0)
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printf("broadcast %s ", inet_ntoa(sin->sin_addr));
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}
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print_vhid(ifa, " ");
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putchar('\n');
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}
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#define SIN(x) ((struct sockaddr_in *) &(x))
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static struct sockaddr_in *sintab[] = {
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SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr),
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SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr)
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};
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static void
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in_getaddr(const char *s, int which)
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{
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#define MIN(a,b) ((a)<(b)?(a):(b))
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struct sockaddr_in *sin = sintab[which];
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struct hostent *hp;
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struct netent *np;
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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if (which == ADDR) {
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char *p = NULL;
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if((p = strrchr(s, '/')) != NULL) {
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const char *errstr;
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/* address is `name/masklen' */
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int masklen;
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struct sockaddr_in *min = sintab[MASK];
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*p = '\0';
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if (!isdigit(*(p + 1)))
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errstr = "invalid";
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else
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masklen = (int)strtonum(p + 1, 0, 32, &errstr);
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if (errstr != NULL) {
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*p = '/';
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errx(1, "%s: bad value (width %s)", s, errstr);
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}
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min->sin_family = AF_INET;
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min->sin_len = sizeof(*min);
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min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) &
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0xffffffff);
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}
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}
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if (inet_aton(s, &sin->sin_addr))
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return;
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if ((hp = gethostbyname(s)) != 0)
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bcopy(hp->h_addr, (char *)&sin->sin_addr,
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MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
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else if ((np = getnetbyname(s)) != 0)
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sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
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else
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errx(1, "%s: bad value", s);
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#undef MIN
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}
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static void
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in_status_tunnel(int s)
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{
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char src[NI_MAXHOST];
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char dst[NI_MAXHOST];
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struct ifreq ifr;
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const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr;
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memset(&ifr, 0, sizeof(ifr));
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strncpy(ifr.ifr_name, name, IFNAMSIZ);
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if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
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return;
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if (sa->sa_family != AF_INET)
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return;
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if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0)
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src[0] = '\0';
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if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0)
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return;
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if (sa->sa_family != AF_INET)
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return;
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if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0)
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dst[0] = '\0';
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printf("\ttunnel inet %s --> %s\n", src, dst);
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}
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static void
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in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
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{
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struct in_aliasreq addreq;
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memset(&addreq, 0, sizeof(addreq));
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strncpy(addreq.ifra_name, name, IFNAMSIZ);
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memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
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memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len);
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if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0)
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warn("SIOCSIFPHYADDR");
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}
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static struct afswtch af_inet = {
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.af_name = "inet",
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.af_af = AF_INET,
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.af_status = in_status,
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.af_getaddr = in_getaddr,
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.af_status_tunnel = in_status_tunnel,
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.af_settunnel = in_set_tunnel,
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.af_difaddr = SIOCDIFADDR,
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.af_aifaddr = SIOCAIFADDR,
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.af_ridreq = &in_ridreq,
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.af_addreq = &in_addreq,
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};
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static __constructor void
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inet_ctor(void)
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{
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#ifndef RESCUE
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if (!feature_present("inet"))
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return;
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#endif
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af_register(&af_inet);
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}
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