8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
243 lines
6.5 KiB
C
243 lines
6.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#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/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 <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 <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 char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/
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extern char *f_inet, *f_addr;
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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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int error, n_flags;
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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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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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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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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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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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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)) != NULL)
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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)) != NULL)
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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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strlcpy(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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strlcpy(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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