fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
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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* 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/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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