9a2ff3154b
Also switch from BSD 3-clause to 2-clause license where possible, and consolidate duplicate 3-clause license into one. Submitted by: Marie Helene Kvello-Aune <marieheleneka@gmail.com> Reviewed by: cem, kp Differential Revision: https://reviews.freebsd.org/D7764
422 lines
9.9 KiB
C
422 lines
9.9 KiB
C
/*
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* Copyright (c) 2016, Marie Helene Kvello-Aune
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* thislist of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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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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* $FreeBSD$
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*/
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#include <sys/ioctl.h>
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#include <net/if.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 <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 "libifconfig.h"
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#include "libifconfig_internal.h"
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ifconfig_handle_t *
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ifconfig_open(void)
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{
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struct ifconfig_handle *h;
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h = calloc(1, sizeof(*h));
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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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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_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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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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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,
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&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,
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&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,
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&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_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,
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&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,
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&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_set_metric(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, SIOCSIFMETRIC,
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&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,
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&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,
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&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,
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&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,
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&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_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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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFDESTROY,
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&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_create_interface(ifconfig_handle_t *h, const char *name, char **ifname)
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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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* TODO:
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* Insert special snowflake handling here. See GitHub issue #12 for details.
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* In the meantime, hard-nosupport interfaces that need special handling.
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*/
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if ((strncmp(name, "wlan",
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strlen("wlan")) == 0) ||
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(strncmp(name, "vlan",
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strlen("vlan")) == 0) ||
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(strncmp(name, "vxlan",
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strlen("vxlan")) == 0)) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOSYS;
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return (-1);
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}
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/* No special handling for this interface type. */
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if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFCREATE2, &ifr) < 0) {
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return (-1);
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}
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*ifname = strdup(ifr.ifr_name);
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return (0);
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}
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