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