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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/syslog.h>
#include <sys/socketvar.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_var.h>
#include <net/if_clone.h>
#include <net/if_vlan_var.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/route/route_ctl.h>
#include <netlink/netlink.h>
#include <netlink/netlink_ctl.h>
#include <netlink/netlink_route.h>
#include <netlink/route/route_var.h>
#include <netinet6/scope6_var.h> /* scope deembedding */
#define DEBUG_MOD_NAME nl_iface_drivers
#define DEBUG_MAX_LEVEL LOG_DEBUG3
#include <netlink/netlink_debug.h>
_DECLARE_DEBUG(LOG_INFO);
/*
* Generic modification interface handler.
* Responsible for changing network stack interface attributes
* such as state, mtu or description.
*/
int
_nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs,
const struct nlattr_bmask *bm, struct nl_pstate *npt)
{
int error;
if (lattrs->ifla_ifalias != NULL) {
if (nlp_has_priv(npt->nlp, PRIV_NET_SETIFDESCR)) {
int len = strlen(lattrs->ifla_ifalias) + 1;
char *buf = if_allocdescr(len, M_WAITOK);
memcpy(buf, lattrs->ifla_ifalias, len);
if_setdescr(ifp, buf);
if_setlastchange(ifp);
} else {
nlmsg_report_err_msg(npt, "Not enough privileges to set descr");
return (EPERM);
}
}
if ((lattrs->ifi_change & IFF_UP) && (lattrs->ifi_flags & IFF_UP) == 0) {
/* Request to down the interface */
if_down(ifp);
}
if (lattrs->ifla_mtu > 0) {
if (nlp_has_priv(npt->nlp, PRIV_NET_SETIFMTU)) {
struct ifreq ifr = { .ifr_mtu = lattrs->ifla_mtu };
error = ifhwioctl(SIOCSIFMTU, ifp, (char *)&ifr, curthread);
} else {
nlmsg_report_err_msg(npt, "Not enough privileges to set mtu");
return (EPERM);
}
}
if (lattrs->ifi_change & IFF_PROMISC) {
error = ifpromisc(ifp, lattrs->ifi_flags & IFF_PROMISC);
if (error != 0) {
nlmsg_report_err_msg(npt, "unable to set promisc");
return (error);
}
}
return (0);
}
/*
* Saves the resulting ifindex and ifname to report them
* to userland along with the operation result.
* NLA format:
* NLMSGERR_ATTR_COOKIE(nested)
* IFLA_NEW_IFINDEX(u32)
* IFLA_IFNAME(string)
*/
void
_nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp)
{
int ifname_len = strlen(if_name(ifp));
uint32_t ifindex = (uint32_t)if_getindex(ifp);
int nla_len = sizeof(struct nlattr) * 3 +
sizeof(ifindex) + NL_ITEM_ALIGN(ifname_len + 1);
struct nlattr *nla_cookie = npt_alloc(npt, nla_len);
/* Nested TLV */
nla_cookie->nla_len = nla_len;
nla_cookie->nla_type = NLMSGERR_ATTR_COOKIE;
struct nlattr *nla = nla_cookie + 1;
nla->nla_len = sizeof(struct nlattr) + sizeof(ifindex);
nla->nla_type = IFLA_NEW_IFINDEX;
memcpy(NLA_DATA(nla), &ifindex, sizeof(ifindex));
nla = NLA_NEXT(nla);
nla->nla_len = sizeof(struct nlattr) + ifname_len + 1;
nla->nla_type = IFLA_IFNAME;
strlcpy(NLA_DATA(nla), if_name(ifp), ifname_len + 1);
nlmsg_report_cookie(npt, nla_cookie);
}
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