273 lines
7.2 KiB
C
273 lines
7.2 KiB
C
/* $NetBSD: af_inet.c,v 1.5 2006/11/13 05:13:39 dyoung Exp $ */
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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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* 3. 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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: af_inet.c,v 1.5 2006/11/13 05:13:39 dyoung Exp $");
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#endif /* not lint */
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#include <sys/param.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 <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 <err.h>
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#include <errno.h>
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#include <ifaddrs.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <util.h>
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#include "extern.h"
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#include "af_inet.h"
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static void in_preference(const char *, const struct sockaddr *);
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struct in_aliasreq in_addreq;
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int setipdst;
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void
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setifipdst(const char *addr, int d)
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{
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in_getaddr(addr, DSTADDR);
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setipdst++;
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clearaddr = 0;
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newaddr = 0;
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}
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void
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in_alias(struct ifreq *creq)
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{
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struct sockaddr_in *iasin;
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int alias;
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if (lflag)
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return;
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alias = 1;
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/* Get the non-alias address for this interface. */
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getsock(AF_INET);
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if (s < 0) {
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if (errno == EAFNOSUPPORT)
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return;
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err(EXIT_FAILURE, "socket");
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}
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(void) memset(&ifr, 0, sizeof(ifr));
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estrlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ioctl(s, SIOCGIFADDR, &ifr) == -1) {
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if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
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return;
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} else
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warn("SIOCGIFADDR");
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}
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/* If creq and ifr are the same address, this is not an alias. */
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if (memcmp(&ifr.ifr_addr, &creq->ifr_addr,
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sizeof(creq->ifr_addr)) == 0)
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alias = 0;
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(void) memset(&in_addreq, 0, sizeof(in_addreq));
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estrlcpy(in_addreq.ifra_name, name, sizeof(in_addreq.ifra_name));
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memcpy(&in_addreq.ifra_addr, &creq->ifr_addr,
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sizeof(in_addreq.ifra_addr));
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if (ioctl(s, SIOCGIFALIAS, &in_addreq) == -1) {
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if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
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return;
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} else
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warn("SIOCGIFALIAS");
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}
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iasin = &in_addreq.ifra_addr;
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printf("\tinet %s%s", alias ? "alias " : "", inet_ntoa(iasin->sin_addr));
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if (flags & IFF_POINTOPOINT) {
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iasin = &in_addreq.ifra_dstaddr;
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printf(" -> %s", inet_ntoa(iasin->sin_addr));
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}
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iasin = &in_addreq.ifra_mask;
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printf(" netmask 0x%x", ntohl(iasin->sin_addr.s_addr));
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if (flags & IFF_BROADCAST) {
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iasin = &in_addreq.ifra_broadaddr;
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printf(" broadcast %s", inet_ntoa(iasin->sin_addr));
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}
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}
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static uint16_t
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in_get_preference(const char *ifname, const struct sockaddr *sa)
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{
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struct if_addrprefreq ifap;
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getsock(AF_INET);
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if (s < 0) {
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if (errno == EPROTONOSUPPORT)
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return 0;
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err(EXIT_FAILURE, "socket");
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}
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(void)memset(&ifap, 0, sizeof(ifap));
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(void)strncpy(ifap.ifap_name, name, sizeof(ifap.ifap_name));
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(void)memcpy(&ifap.ifap_addr, sa,
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MIN(sizeof(ifap.ifap_addr), sa->sa_len));
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if (ioctl(s, SIOCGIFADDRPREF, &ifap) == -1) {
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if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT)
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return 0;
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warn("SIOCGIFADDRPREF");
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}
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return ifap.ifap_preference;
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}
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static void
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in_preference(const char *ifname, const struct sockaddr *sa)
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{
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uint16_t preference;
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if (lflag)
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return;
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preference = in_get_preference(ifname, sa);
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printf(" preference %" PRIu16, preference);
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}
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void
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in_status(int force)
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{
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struct ifaddrs *ifap, *ifa;
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struct ifreq isifr;
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int printprefs = 0;
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if (getifaddrs(&ifap) != 0)
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err(EXIT_FAILURE, "getifaddrs");
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/* Print address preference numbers if any address has a non-zero
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* preference assigned.
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*/
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for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
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if (strcmp(name, ifa->ifa_name) != 0)
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continue;
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if (ifa->ifa_addr->sa_family != AF_INET)
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continue;
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if (in_get_preference(ifa->ifa_name, ifa->ifa_addr) != 0) {
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printprefs = 1;
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break;
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}
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}
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for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
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if (strcmp(name, ifa->ifa_name) != 0)
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continue;
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if (ifa->ifa_addr->sa_family != AF_INET)
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continue;
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if (sizeof(isifr.ifr_addr) < ifa->ifa_addr->sa_len)
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continue;
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memset(&isifr, 0, sizeof(isifr));
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estrlcpy(isifr.ifr_name, ifa->ifa_name, sizeof(isifr.ifr_name));
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memcpy(&isifr.ifr_addr, ifa->ifa_addr, ifa->ifa_addr->sa_len);
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in_alias(&isifr);
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if (printprefs)
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in_preference(ifa->ifa_name, ifa->ifa_addr);
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printf("\n");
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}
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if (ifa != NULL) {
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for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
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if (strcmp(name, ifa->ifa_name) != 0)
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continue;
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if (ifa->ifa_addr->sa_family != AF_INET)
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continue;
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}
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}
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freeifaddrs(ifap);
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}
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#define SIN(x) ((struct sockaddr_in *) &(x))
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struct sockaddr_in *sintab[] = {
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SIN(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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void
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in_getaddr(const char *str, int which)
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{
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struct sockaddr_in *gasin = sintab[which];
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struct hostent *hp;
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struct netent *np;
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gasin->sin_len = sizeof(*gasin);
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if (which != MASK)
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gasin->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(str, '/')) != NULL) {
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*p = '\0';
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in_getprefix(p + 1, MASK);
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}
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}
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if (inet_aton(str, &gasin->sin_addr) == 0) {
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if ((hp = gethostbyname(str)) != NULL)
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(void) memcpy(&gasin->sin_addr, hp->h_addr, hp->h_length);
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else if ((np = getnetbyname(str)) != NULL)
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gasin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
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else
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errx(EXIT_FAILURE, "%s: bad value", str);
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}
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}
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void
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in_getprefix(const char *plen, int which)
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{
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struct sockaddr_in *igsin = sintab[which];
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u_char *cp;
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int len = strtol(plen, (char **)NULL, 10);
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if ((len < 0) || (len > 32))
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errx(EXIT_FAILURE, "%s: bad value", plen);
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igsin->sin_len = sizeof(*igsin);
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if (which != MASK)
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igsin->sin_family = AF_INET;
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if ((len == 0) || (len == 32)) {
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memset(&igsin->sin_addr, 0xff, sizeof(struct in_addr));
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return;
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}
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memset((void *)&igsin->sin_addr, 0x00, sizeof(igsin->sin_addr));
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for (cp = (u_char *)&igsin->sin_addr; len > 7; len -= 8)
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*cp++ = 0xff;
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if (len)
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*cp = 0xff << (8 - len);
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}
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