/*
* Copyright (c) 2016, Marie Helene Kvello-Aune
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* thislist of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/ioctl.h>
#include <net/if.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libifconfig.h"
#include "libifconfig_internal.h"
ifconfig_handle_t *
ifconfig_open(void)
{
struct ifconfig_handle *h;
h = calloc(1, sizeof(*h));
for (int i = 0; i <= AF_MAX; i++) {
h->sockets[i] = -1;
}
return (h);
}
void
ifconfig_close(ifconfig_handle_t *h)
{
for (int i = 0; i <= AF_MAX; i++) {
if (h->sockets[i] != -1) {
(void)close(h->sockets[i]);
}
}
free(h);
}
ifconfig_errtype
ifconfig_err_errtype(ifconfig_handle_t *h)
{
return (h->error.errtype);
}
int
ifconfig_err_errno(ifconfig_handle_t *h)
{
return (h->error.errcode);
}
unsigned long
ifconfig_err_ioctlreq(ifconfig_handle_t *h)
{
return (h->error.ioctl_request);
}
int
ifconfig_get_description(ifconfig_handle_t *h, const char *name,
char **description)
{
struct ifreq ifr;
char *descr;
size_t descrlen;
descr = NULL;
descrlen = 64;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
for (;;) {
if ((descr = reallocf(descr, descrlen)) == NULL) {
h->error.errtype = OTHER;
h->error.errcode = ENOMEM;
return (-1);
}
ifr.ifr_buffer.buffer = descr;
ifr.ifr_buffer.length = descrlen;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFDESCR, &ifr) != 0) {
return (-1);
}
if (ifr.ifr_buffer.buffer == descr) {
if (strlen(descr) > 0) {
*description = strdup(descr);
free(descr);
return (0);
}
} else if (ifr.ifr_buffer.length > descrlen) {
descrlen = ifr.ifr_buffer.length;
continue;
}
break;
}
free(descr);
h->error.errtype = OTHER;
h->error.errcode = 0;
return (-1);
}
int
ifconfig_set_description(ifconfig_handle_t *h, const char *name,
const char *newdescription)
{
struct ifreq ifr;
int desclen;
memset(&ifr, 0, sizeof(ifr));
desclen = strlen(newdescription);
/*
* Unset description if the new description is 0 characters long.
* TODO: Decide whether this should be an error condition instead.
*/
if (desclen == 0) {
return (ifconfig_unset_description(h, name));
}
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_buffer.length = desclen + 1;
ifr.ifr_buffer.buffer = strdup(newdescription);
if (ifr.ifr_buffer.buffer == NULL) {
h->error.errtype = OTHER;
h->error.errcode = ENOMEM;
return (-1);
}
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR,
&ifr) != 0) {
free(ifr.ifr_buffer.buffer);
return (-1);
}
free(ifr.ifr_buffer.buffer);
return (0);
}
int
ifconfig_unset_description(ifconfig_handle_t *h, const char *name)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_buffer.length = 0;
ifr.ifr_buffer.buffer = NULL;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR,
&ifr) < 0) {
return (-1);
}
return (0);
}
int
ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newname)
{
struct ifreq ifr;
char *tmpname;
memset(&ifr, 0, sizeof(ifr));
tmpname = strdup(newname);
if (tmpname == NULL) {
h->error.errtype = OTHER;
h->error.errcode = ENOMEM;
return (-1);
}
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_data = tmpname;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFNAME,
&ifr) != 0) {
free(tmpname);
return (-1);
}
free(tmpname);
return (0);
}
int
ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_mtu = mtu;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMTU,
&ifr) < 0) {
return (-1);
}
return (0);
}
int
ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMTU,
&ifr) == -1) {
return (-1);
}
*mtu = ifr.ifr_mtu;
return (0);
}
int
ifconfig_set_metric(ifconfig_handle_t *h, const char *name, const int mtu)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_mtu = mtu;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMETRIC,
&ifr) < 0) {
return (-1);
}
return (0);
}
int
ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMETRIC,
&ifr) == -1) {
return (-1);
}
*metric = ifr.ifr_metric;
return (0);
}
int
ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
const int capability)
{
struct ifreq ifr;
struct ifconfig_capabilities ifcap;
int flags, value;
memset(&ifr, 0, sizeof(ifr));
if (ifconfig_get_capability(h, name,
&ifcap) != 0) {
return (-1);
}
value = capability;
flags = ifcap.curcap;
if (value < 0) {
value = -value;
flags &= ~value;
} else {
flags |= value;
}
flags &= ifcap.reqcap;
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
/*
* TODO: Verify that it's safe to not have ifr.ifr_curcap
* set for this request.
*/
ifr.ifr_reqcap = flags;
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFCAP,
&ifr) < 0) {
return (-1);
}
return (0);
}
int
ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
struct ifconfig_capabilities *capability)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFCAP,
&ifr) < 0) {
return (-1);
}
capability->curcap = ifr.ifr_curcap;
capability->reqcap = ifr.ifr_reqcap;
return (0);
}
int
ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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);
return (0);
}
