2004-12-08 19:18:07 +00:00
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/*
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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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2015-05-11 04:54:56 +00:00
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#include <sys/param.h>
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2004-12-08 19:18:07 +00:00
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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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2010-01-14 15:27:18 +00:00
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#include <ctype.h>
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2004-12-08 19:18:07 +00:00
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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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2007-02-24 23:55:46 +00:00
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#include <ifaddrs.h>
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2004-12-08 19:18:07 +00:00
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#include <netinet/in.h>
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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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2009-04-15 20:53:34 +00:00
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static struct in_aliasreq in_addreq;
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2004-12-08 19:18:07 +00:00
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static struct ifreq in_ridreq;
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2016-06-02 03:16:02 +00:00
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static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/
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2016-05-31 17:30:08 +00:00
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extern char *f_inet, *f_addr;
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2004-12-08 19:18:07 +00:00
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static void
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2007-02-24 23:55:46 +00:00
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in_status(int s __unused, const struct ifaddrs *ifa)
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2004-12-08 19:18:07 +00:00
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{
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struct sockaddr_in *sin, null_sin;
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2016-05-31 17:30:08 +00:00
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int error, n_flags;
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2004-12-08 19:18:07 +00:00
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memset(&null_sin, 0, sizeof(null_sin));
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2007-02-24 23:55:46 +00:00
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sin = (struct sockaddr_in *)ifa->ifa_addr;
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2004-12-08 19:18:07 +00:00
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if (sin == NULL)
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return;
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2016-05-31 17:30:08 +00:00
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if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0)
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n_flags = 0;
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else if (f_addr != NULL && strcmp(f_addr, "host") == 0)
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n_flags = NI_NOFQDN;
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else
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n_flags = NI_NUMERICHOST;
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error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf,
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sizeof(addr_buf), NULL, 0, n_flags);
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if (error)
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inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf));
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printf("\tinet %s", addr_buf);
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2004-12-08 19:18:07 +00:00
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2007-02-24 23:55:46 +00:00
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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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2004-12-08 19:18:07 +00:00
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sin = &null_sin;
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2016-05-31 17:30:08 +00:00
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printf(" --> %s ", inet_ntoa(sin->sin_addr));
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2004-12-08 19:18:07 +00:00
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}
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2007-02-24 23:55:46 +00:00
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sin = (struct sockaddr_in *)ifa->ifa_netmask;
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if (sin == NULL)
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2004-12-08 19:18:07 +00:00
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sin = &null_sin;
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2016-05-31 17:30:08 +00:00
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if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) {
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int cidr = 32;
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unsigned long smask;
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smask = ntohl(sin->sin_addr.s_addr);
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while ((smask & 1) == 0) {
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smask = smask >> 1;
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cidr--;
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if (cidr == 0)
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break;
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}
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printf("/%d ", cidr);
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} else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0)
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printf(" netmask %s ", inet_ntoa(sin->sin_addr));
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else
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printf(" netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
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2004-12-08 19:18:07 +00:00
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2007-02-24 23:55:46 +00:00
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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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A major overhaul of the CARP implementation. The ip_carp.c was started
from scratch, copying needed functionality from the old implemenation
on demand, with a thorough review of all code. The main change is that
interface layer has been removed from the CARP. Now redundant addresses
are configured exactly on the interfaces, they run on.
The CARP configuration itself is, as before, configured and read via
SIOCSVH/SIOCGVH ioctls. A new prefix created with SIOCAIFADDR or
SIOCAIFADDR_IN6 may now be configured to a particular virtual host id,
which makes the prefix redundant.
ifconfig(8) semantics has been changed too: now one doesn't need
to clone carpXX interface, he/she should directly configure a vhid
on a Ethernet interface.
To supply vhid data from the kernel to an application the getifaddrs(8)
function had been changed to pass ifam_data with each address. [1]
The new implementation definitely closes all PRs related to carp(4)
being an interface, and may close several others. It also allows
to run a single redundant IP per interface.
Big thanks to Bjoern Zeeb for his help with inet6 part of patch, for
idea on using ifam_data and for several rounds of reviewing!
PR: kern/117000, kern/126945, kern/126714, kern/120130, kern/117448
Reviewed by: bz
Submitted by: bz [1]
2011-12-16 12:16:56 +00:00
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printf("broadcast %s ", inet_ntoa(sin->sin_addr));
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2004-12-08 19:18:07 +00:00
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}
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A major overhaul of the CARP implementation. The ip_carp.c was started
from scratch, copying needed functionality from the old implemenation
on demand, with a thorough review of all code. The main change is that
interface layer has been removed from the CARP. Now redundant addresses
are configured exactly on the interfaces, they run on.
The CARP configuration itself is, as before, configured and read via
SIOCSVH/SIOCGVH ioctls. A new prefix created with SIOCAIFADDR or
SIOCAIFADDR_IN6 may now be configured to a particular virtual host id,
which makes the prefix redundant.
ifconfig(8) semantics has been changed too: now one doesn't need
to clone carpXX interface, he/she should directly configure a vhid
on a Ethernet interface.
To supply vhid data from the kernel to an application the getifaddrs(8)
function had been changed to pass ifam_data with each address. [1]
The new implementation definitely closes all PRs related to carp(4)
being an interface, and may close several others. It also allows
to run a single redundant IP per interface.
Big thanks to Bjoern Zeeb for his help with inet6 part of patch, for
idea on using ifam_data and for several rounds of reviewing!
PR: kern/117000, kern/126945, kern/126714, kern/120130, kern/117448
Reviewed by: bz
Submitted by: bz [1]
2011-12-16 12:16:56 +00:00
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print_vhid(ifa, " ");
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2004-12-08 19:18:07 +00:00
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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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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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2011-11-19 19:06:08 +00:00
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sin->sin_family = AF_INET;
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2004-12-08 19:18:07 +00:00
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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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2010-01-14 15:27:18 +00:00
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const char *errstr;
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2004-12-08 19:18:07 +00:00
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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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2010-01-14 15:27:18 +00:00
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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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2004-12-08 19:18:07 +00:00
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*p = '/';
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2010-01-14 15:27:18 +00:00
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errx(1, "%s: bad value (width %s)", s, errstr);
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2004-12-08 19:18:07 +00:00
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}
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2011-12-16 13:30:17 +00:00
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min->sin_family = AF_INET;
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2004-12-08 19:18:07 +00:00
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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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2016-04-18 14:12:42 +00:00
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if ((hp = gethostbyname(s)) != NULL)
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2004-12-08 19:18:07 +00:00
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bcopy(hp->h_addr, (char *)&sin->sin_addr,
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2009-06-23 23:49:52 +00:00
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MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
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2016-04-18 14:12:42 +00:00
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else if ((np = getnetbyname(s)) != NULL)
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2004-12-08 19:18:07 +00:00
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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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}
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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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Use strlcpy() instead of strncpy() when copying ifname to ensure
that it is NUL terminated. Additional NUL padding is not required
for short names.
Use sizeof(destination) in a few places instead of IFNAMSIZ.
Cast afp->af_ridreq and afp->af_addreq to make the intent of
the code more obvious.
Reported by: Coverity
CID: 1009628, 1009630, 1009631, 1009632, 1009633, 1009635, 1009638
CID: 1009639, 1009640, 1009641, 1009642, 1009643, 1009644, 1009645
CID: 1009646, 1009647, 1010049, 1010050, 1010051, 1010052, 1010053
CID: 1010054, 1011293, 1011294, 1011295, 1011296, 1011297, 1011298
CID: 1011299, 1305821, 1351720, 1351721
MFC after: 1 week
2016-05-16 00:25:24 +00:00
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strlcpy(ifr.ifr_name, name, IFNAMSIZ);
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2004-12-08 19:18:07 +00:00
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if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
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return;
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2005-06-16 19:37:09 +00:00
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if (sa->sa_family != AF_INET)
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return;
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2004-12-08 19:18:07 +00:00
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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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2005-06-16 19:37:09 +00:00
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if (sa->sa_family != AF_INET)
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return;
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2004-12-08 19:18:07 +00:00
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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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2009-04-15 20:53:34 +00:00
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struct in_aliasreq addreq;
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2004-12-08 19:18:07 +00:00
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memset(&addreq, 0, sizeof(addreq));
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Use strlcpy() instead of strncpy() when copying ifname to ensure
that it is NUL terminated. Additional NUL padding is not required
for short names.
Use sizeof(destination) in a few places instead of IFNAMSIZ.
Cast afp->af_ridreq and afp->af_addreq to make the intent of
the code more obvious.
Reported by: Coverity
CID: 1009628, 1009630, 1009631, 1009632, 1009633, 1009635, 1009638
CID: 1009639, 1009640, 1009641, 1009642, 1009643, 1009644, 1009645
CID: 1009646, 1009647, 1010049, 1010050, 1010051, 1010052, 1010053
CID: 1010054, 1011293, 1011294, 1011295, 1011296, 1011297, 1011298
CID: 1011299, 1305821, 1351720, 1351721
MFC after: 1 week
2016-05-16 00:25:24 +00:00
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strlcpy(addreq.ifra_name, name, IFNAMSIZ);
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2004-12-08 19:18:07 +00:00
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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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{
|
2011-07-18 10:29:16 +00:00
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#ifndef RESCUE
|
2011-05-31 14:40:21 +00:00
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if (!feature_present("inet"))
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return;
|
2011-07-18 10:29:16 +00:00
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#endif
|
2004-12-08 19:18:07 +00:00
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af_register(&af_inet);
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}
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