Move list_cloners() from ifconfig(8) to libifconfig(3) where it can be reused by other consumers. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D26858
663 lines
14 KiB
C
663 lines
14 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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* Copyright (c) 2016-2017, Marie Helene Kvello-Aune. 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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_mib.h>
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#include <netinet/in.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/nd6.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ifaddrs.h>
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#include <stdbool.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 <net/if_vlan_var.h>
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#include "libifconfig.h"
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#include "libifconfig_internal.h"
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#define NOTAG ((u_short) -1)
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static bool
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isnd6defif(ifconfig_handle_t *h, const char *name)
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{
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struct in6_ndifreq ndifreq;
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unsigned int ifindex;
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memset(&ndifreq, 0, sizeof(ndifreq));
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strlcpy(ndifreq.ifname, name, sizeof(ndifreq.ifname));
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ifindex = if_nametoindex(ndifreq.ifname);
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if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGDEFIFACE_IN6, &ndifreq) < 0) {
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return (false);
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}
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h->error.errtype = OK;
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return (ndifreq.ifindex == ifindex);
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}
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ifconfig_handle_t *
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ifconfig_open(void)
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{
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ifconfig_handle_t *h;
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h = calloc(1, sizeof(*h));
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if (h == NULL) {
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return (NULL);
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}
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for (int i = 0; i <= AF_MAX; i++) {
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h->sockets[i] = -1;
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}
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return (h);
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}
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void
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ifconfig_close(ifconfig_handle_t *h)
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{
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for (int i = 0; i <= AF_MAX; i++) {
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if (h->sockets[i] != -1) {
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(void)close(h->sockets[i]);
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}
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}
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freeifaddrs(h->ifap);
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free(h);
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}
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ifconfig_errtype
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ifconfig_err_errtype(ifconfig_handle_t *h)
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{
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return (h->error.errtype);
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}
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int
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ifconfig_err_errno(ifconfig_handle_t *h)
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{
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return (h->error.errcode);
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}
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unsigned long
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ifconfig_err_ioctlreq(ifconfig_handle_t *h)
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{
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return (h->error.ioctl_request);
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}
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int
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ifconfig_foreach_iface(ifconfig_handle_t *h,
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ifconfig_foreach_func_t cb, void *udata)
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{
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int ret;
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ret = ifconfig_getifaddrs(h);
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if (ret == 0) {
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struct ifaddrs *ifa;
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char *ifname = NULL;
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for (ifa = h->ifap; ifa; ifa = ifa->ifa_next) {
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if (ifname != ifa->ifa_name) {
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ifname = ifa->ifa_name;
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cb(h, ifa, udata);
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}
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}
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}
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/* Free ifaddrs so we don't accidentally cache stale data */
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freeifaddrs(h->ifap);
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h->ifap = NULL;
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return (ret);
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}
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void
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ifconfig_foreach_ifaddr(ifconfig_handle_t *h, struct ifaddrs *ifa,
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ifconfig_foreach_func_t cb, void *udata)
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{
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struct ifaddrs *ift;
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for (ift = ifa;
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ift != NULL &&
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ift->ifa_addr != NULL &&
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strcmp(ift->ifa_name, ifa->ifa_name) == 0;
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ift = ift->ifa_next) {
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cb(h, ift, udata);
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}
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}
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int
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ifconfig_get_description(ifconfig_handle_t *h, const char *name,
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char **description)
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{
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struct ifreq ifr;
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char *descr;
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size_t descrlen;
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descr = NULL;
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descrlen = 64;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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for (;;) {
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if ((descr = reallocf(descr, descrlen)) == NULL) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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ifr.ifr_buffer.buffer = descr;
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ifr.ifr_buffer.length = descrlen;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFDESCR, &ifr) != 0) {
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free(descr);
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return (-1);
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}
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if (ifr.ifr_buffer.buffer == descr) {
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if (strlen(descr) > 0) {
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*description = strdup(descr);
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free(descr);
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if (description == NULL) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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return (0);
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}
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} else if (ifr.ifr_buffer.length > descrlen) {
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descrlen = ifr.ifr_buffer.length;
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continue;
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}
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break;
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}
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free(descr);
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h->error.errtype = OTHER;
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h->error.errcode = 0;
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return (-1);
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}
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int
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ifconfig_set_description(ifconfig_handle_t *h, const char *name,
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const char *newdescription)
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{
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struct ifreq ifr;
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int desclen;
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memset(&ifr, 0, sizeof(ifr));
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desclen = strlen(newdescription);
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/*
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* Unset description if the new description is 0 characters long.
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* TODO: Decide whether this should be an error condition instead.
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*/
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if (desclen == 0) {
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return (ifconfig_unset_description(h, name));
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}
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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ifr.ifr_buffer.length = desclen + 1;
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ifr.ifr_buffer.buffer = strdup(newdescription);
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if (ifr.ifr_buffer.buffer == NULL) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR, &ifr) != 0) {
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free(ifr.ifr_buffer.buffer);
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return (-1);
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}
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free(ifr.ifr_buffer.buffer);
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return (0);
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}
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int
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ifconfig_unset_description(ifconfig_handle_t *h, const char *name)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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ifr.ifr_buffer.length = 0;
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ifr.ifr_buffer.buffer = NULL;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR, &ifr) < 0) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newname)
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{
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struct ifreq ifr;
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char *tmpname;
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memset(&ifr, 0, sizeof(ifr));
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tmpname = strdup(newname);
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if (tmpname == NULL) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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ifr.ifr_data = tmpname;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFNAME, &ifr) != 0) {
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free(tmpname);
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return (-1);
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}
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free(tmpname);
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return (0);
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}
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int
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ifconfig_get_orig_name(ifconfig_handle_t *h, const char *ifname,
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char **orig_name)
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{
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size_t len;
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unsigned int ifindex;
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int name[6];
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ifindex = if_nametoindex(ifname);
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if (ifindex == 0) {
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goto fail;
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}
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name[0] = CTL_NET;
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name[1] = PF_LINK;
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name[2] = NETLINK_GENERIC;
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name[3] = IFMIB_IFDATA;
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name[4] = ifindex;
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name[5] = IFDATA_DRIVERNAME;
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len = 0;
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if (sysctl(name, 6, NULL, &len, 0, 0) < 0) {
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goto fail;
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}
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*orig_name = malloc(len);
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if (*orig_name == NULL) {
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goto fail;
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}
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if (sysctl(name, 6, *orig_name, &len, 0, 0) < 0) {
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free(*orig_name);
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*orig_name = NULL;
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goto fail;
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}
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return (0);
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fail:
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h->error.errtype = OTHER;
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h->error.errcode = (errno != 0) ? errno : ENOENT;
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return (-1);
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}
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int
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ifconfig_get_fib(ifconfig_handle_t *h, const char *name, int *fib)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFFIB, &ifr) == -1) {
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return (-1);
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}
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*fib = ifr.ifr_fib;
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return (0);
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}
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int
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ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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ifr.ifr_mtu = mtu;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMTU, &ifr) < 0) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMTU, &ifr) == -1) {
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return (-1);
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}
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*mtu = ifr.ifr_mtu;
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return (0);
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}
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int
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ifconfig_get_nd6(ifconfig_handle_t *h, const char *name,
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struct in6_ndireq *nd)
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{
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memset(nd, 0, sizeof(*nd));
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strlcpy(nd->ifname, name, sizeof(nd->ifname));
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if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFINFO_IN6, nd) == -1) {
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return (-1);
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}
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if (isnd6defif(h, name)) {
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nd->ndi.flags |= ND6_IFF_DEFAULTIF;
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} else if (h->error.errtype != OK) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_set_metric(ifconfig_handle_t *h, const char *name, const int metric)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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ifr.ifr_metric = metric;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMETRIC, &ifr) < 0) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMETRIC, &ifr) == -1) {
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return (-1);
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}
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*metric = ifr.ifr_metric;
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return (0);
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}
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int
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ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
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const int capability)
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{
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struct ifreq ifr;
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struct ifconfig_capabilities ifcap;
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int flags, value;
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memset(&ifr, 0, sizeof(ifr));
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if (ifconfig_get_capability(h, name, &ifcap) != 0) {
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return (-1);
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}
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value = capability;
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flags = ifcap.curcap;
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if (value < 0) {
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value = -value;
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flags &= ~value;
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} else {
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flags |= value;
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}
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flags &= ifcap.reqcap;
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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/*
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* TODO: Verify that it's safe to not have ifr.ifr_curcap
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* set for this request.
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*/
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ifr.ifr_reqcap = flags;
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFCAP, &ifr) < 0) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
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struct ifconfig_capabilities *capability)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFCAP, &ifr) < 0) {
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return (-1);
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}
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capability->curcap = ifr.ifr_curcap;
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capability->reqcap = ifr.ifr_reqcap;
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return (0);
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}
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int
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ifconfig_get_groups(ifconfig_handle_t *h, const char *name,
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struct ifgroupreq *ifgr)
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{
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int len;
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memset(ifgr, 0, sizeof(*ifgr));
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strlcpy(ifgr->ifgr_name, name, IFNAMSIZ);
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFGROUP, ifgr) == -1) {
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if ((h->error.errcode == EINVAL) ||
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(h->error.errcode == ENOTTY)) {
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return (0);
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} else {
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return (-1);
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}
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}
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len = ifgr->ifgr_len;
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ifgr->ifgr_groups = (struct ifg_req *)malloc(len);
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if (ifgr->ifgr_groups == NULL) {
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return (1);
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}
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bzero(ifgr->ifgr_groups, len);
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFGROUP, ifgr) == -1) {
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return (-1);
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}
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return (0);
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}
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int
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ifconfig_get_ifstatus(ifconfig_handle_t *h, const char *name,
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struct ifstat *ifs)
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{
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strlcpy(ifs->ifs_name, name, sizeof(ifs->ifs_name));
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return (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFSTATUS, ifs));
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}
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int
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ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name)
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{
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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|
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFDESTROY, &ifr) < 0) {
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ifconfig_create_interface(ifconfig_handle_t *h, const char *name, char **ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
|
|
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
|
|
/*
|
|
* TODO:
|
|
* Insert special snowflake handling here. See GitHub issue #12 for details.
|
|
* In the meantime, hard-nosupport interfaces that need special handling.
|
|
*/
|
|
if ((strncmp(name, "wlan",
|
|
strlen("wlan")) == 0) ||
|
|
(strncmp(name, "vlan",
|
|
strlen("vlan")) == 0) ||
|
|
(strncmp(name, "vxlan",
|
|
strlen("vxlan")) == 0)) {
|
|
h->error.errtype = OTHER;
|
|
h->error.errcode = ENOSYS;
|
|
return (-1);
|
|
}
|
|
|
|
/* No special handling for this interface type. */
|
|
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFCREATE2, &ifr) < 0) {
|
|
return (-1);
|
|
}
|
|
|
|
*ifname = strdup(ifr.ifr_name);
|
|
if (ifname == NULL) {
|
|
h->error.errtype = OTHER;
|
|
h->error.errcode = ENOMEM;
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ifconfig_create_interface_vlan(ifconfig_handle_t *h, const char *name,
|
|
char **ifname, const char *vlandev, const unsigned short vlantag)
|
|
{
|
|
struct ifreq ifr;
|
|
struct vlanreq params;
|
|
|
|
if ((vlantag == NOTAG) || (vlandev[0] == '\0')) {
|
|
// TODO: Add proper error tracking here
|
|
return (-1);
|
|
}
|
|
|
|
bzero(¶ms, sizeof(params));
|
|
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
params.vlr_tag = vlantag;
|
|
(void)strlcpy(params.vlr_parent, vlandev, sizeof(params.vlr_parent));
|
|
ifr.ifr_data = (caddr_t)¶ms;
|
|
|
|
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFCREATE2, &ifr) < 0) {
|
|
// TODO: Add proper error tracking here
|
|
return (-1);
|
|
}
|
|
|
|
*ifname = strdup(ifr.ifr_name);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ifconfig_set_vlantag(ifconfig_handle_t *h, const char *name,
|
|
const char *vlandev, const unsigned short vlantag)
|
|
{
|
|
struct ifreq ifr;
|
|
struct vlanreq params;
|
|
|
|
bzero(¶ms, sizeof(params));
|
|
params.vlr_tag = vlantag;
|
|
strlcpy(params.vlr_parent, vlandev, sizeof(params.vlr_parent));
|
|
|
|
ifr.ifr_data = (caddr_t)¶ms;
|
|
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSETVLAN, &ifr) == -1) {
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ifconfig_list_cloners(ifconfig_handle_t *h, char **bufp, size_t *lenp)
|
|
{
|
|
struct if_clonereq ifcr;
|
|
char *buf;
|
|
|
|
memset(&ifcr, 0, sizeof(ifcr));
|
|
*bufp = NULL;
|
|
*lenp = 0;
|
|
|
|
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFGCLONERS, &ifcr) < 0)
|
|
return (-1);
|
|
|
|
buf = malloc(ifcr.ifcr_total * IFNAMSIZ);
|
|
if (buf == NULL) {
|
|
h->error.errtype = OTHER;
|
|
h->error.errcode = ENOMEM;
|
|
return (-1);
|
|
}
|
|
|
|
ifcr.ifcr_count = ifcr.ifcr_total;
|
|
ifcr.ifcr_buffer = buf;
|
|
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFGCLONERS, &ifcr) < 0) {
|
|
free(buf);
|
|
return (-1);
|
|
}
|
|
|
|
*bufp = buf;
|
|
*lenp = ifcr.ifcr_total;
|
|
return (0);
|
|
}
|