recurse from one vnet to another which is OK, so no need to flood the console with warnings here. Approved by: re (rwatson), julian (mentor)
3183 lines
74 KiB
C
3183 lines
74 KiB
C
/*-
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* Copyright (c) 1980, 1986, 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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* @(#)if.c 8.5 (Berkeley) 1/9/95
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* $FreeBSD$
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*/
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#include "opt_compat.h"
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#include "opt_inet6.h"
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#include "opt_inet.h"
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#include "opt_carp.h"
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/sbuf.h>
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#include <sys/bus.h>
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#include <sys/mbuf.h>
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#include <sys/systm.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/refcount.h>
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#include <sys/module.h>
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#include <sys/rwlock.h>
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#include <sys/sockio.h>
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#include <sys/syslog.h>
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#include <sys/sysctl.h>
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#include <sys/taskqueue.h>
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#include <sys/domain.h>
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#include <sys/jail.h>
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#include <machine/stdarg.h>
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#include <vm/uma.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_clone.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/radix.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#if defined(INET) || defined(INET6)
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/*XXX*/
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#ifdef INET6
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#include <netinet6/in6_var.h>
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#include <netinet6/in6_ifattach.h>
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#endif
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#endif
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#ifdef INET
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#include <netinet/if_ether.h>
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#endif
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#if defined(INET) || defined(INET6)
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#ifdef DEV_CARP
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#include <netinet/ip_carp.h>
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#endif
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#endif
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#include <security/mac/mac_framework.h>
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struct ifindex_entry {
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struct ifnet *ife_ifnet;
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};
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static int slowtimo_started;
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SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
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SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
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/* Log link state change events */
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static int log_link_state_change = 1;
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SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
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&log_link_state_change, 0,
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"log interface link state change events");
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void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
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void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
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void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
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struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
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/*
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* XXX: Style; these should be sorted alphabetically, and unprototyped
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* static functions should be prototyped. Currently they are sorted by
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* declaration order.
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*/
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static void if_attachdomain(void *);
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static void if_attachdomain1(struct ifnet *);
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static int ifconf(u_long, caddr_t);
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static void if_freemulti(struct ifmultiaddr *);
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static void if_init(void *);
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static void if_check(void *);
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static void if_route(struct ifnet *, int flag, int fam);
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static int if_setflag(struct ifnet *, int, int, int *, int);
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static void if_slowtimo(void *);
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static int if_transmit(struct ifnet *ifp, struct mbuf *m);
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static void if_unroute(struct ifnet *, int flag, int fam);
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static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
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static int if_rtdel(struct radix_node *, void *);
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static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
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static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
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static void do_link_state_change(void *, int);
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static int if_getgroup(struct ifgroupreq *, struct ifnet *);
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static int if_getgroupmembers(struct ifgroupreq *);
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static void if_delgroups(struct ifnet *);
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static void if_attach_internal(struct ifnet *, int);
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static void if_detach_internal(struct ifnet *, int);
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#ifdef INET6
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/*
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* XXX: declare here to avoid to include many inet6 related files..
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* should be more generalized?
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*/
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extern void nd6_setmtu(struct ifnet *);
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#endif
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VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
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VNET_DEFINE(struct ifgrouphead, ifg_head);
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VNET_DEFINE(int, if_index);
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static VNET_DEFINE(int, if_indexlim) = 8;
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/* Table of ifnet by index. Locked with ifnet_lock. */
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static VNET_DEFINE(struct ifindex_entry *, ifindex_table);
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#define V_if_indexlim VNET(if_indexlim)
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#define V_ifindex_table VNET(ifindex_table)
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int ifqmaxlen = IFQ_MAXLEN;
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struct rwlock ifnet_lock;
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static if_com_alloc_t *if_com_alloc[256];
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static if_com_free_t *if_com_free[256];
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/*
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* System initialization
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*/
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SYSINIT(interface_check, SI_SUB_PROTO_IF, SI_ORDER_FIRST, if_check, NULL);
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MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
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MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
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MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
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struct ifnet *
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ifnet_byindex_locked(u_short idx)
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{
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if (idx > V_if_index)
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return (NULL);
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return (V_ifindex_table[idx].ife_ifnet);
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}
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struct ifnet *
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ifnet_byindex(u_short idx)
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{
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struct ifnet *ifp;
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IFNET_RLOCK();
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ifp = ifnet_byindex_locked(idx);
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IFNET_RUNLOCK();
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return (ifp);
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}
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struct ifnet *
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ifnet_byindex_ref(u_short idx)
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{
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struct ifnet *ifp;
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IFNET_RLOCK();
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ifp = ifnet_byindex_locked(idx);
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if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
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IFNET_RUNLOCK();
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return (NULL);
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}
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if_ref(ifp);
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IFNET_RUNLOCK();
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return (ifp);
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}
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static void
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ifnet_setbyindex(u_short idx, struct ifnet *ifp)
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{
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IFNET_WLOCK_ASSERT();
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V_ifindex_table[idx].ife_ifnet = ifp;
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}
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struct ifaddr *
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ifaddr_byindex(u_short idx)
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{
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struct ifaddr *ifa;
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IFNET_RLOCK();
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ifa = ifnet_byindex_locked(idx)->if_addr;
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if (ifa != NULL)
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ifa_ref(ifa);
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IFNET_RUNLOCK();
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return (ifa);
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}
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/*
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* Network interface utility routines.
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*
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* Routines with ifa_ifwith* names take sockaddr *'s as
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* parameters.
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*/
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static void
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vnet_if_init(const void *unused __unused)
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{
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TAILQ_INIT(&V_ifnet);
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TAILQ_INIT(&V_ifg_head);
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if_grow(); /* create initial table */
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vnet_if_clone_init();
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}
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VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_FIRST, vnet_if_init,
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NULL);
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/* ARGSUSED*/
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static void
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if_init(void *dummy __unused)
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{
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IFNET_LOCK_INIT();
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if_clone_init();
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}
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SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init, NULL);
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#ifdef VIMAGE
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static void
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vnet_if_uninit(const void *unused __unused)
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{
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VNET_ASSERT(TAILQ_EMPTY(&V_ifnet));
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VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head));
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free((caddr_t)V_ifindex_table, M_IFNET);
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}
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VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
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vnet_if_uninit, NULL);
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#endif
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void
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if_grow(void)
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{
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u_int n;
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struct ifindex_entry *e;
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V_if_indexlim <<= 1;
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n = V_if_indexlim * sizeof(*e);
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e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
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if (V_ifindex_table != NULL) {
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memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
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free((caddr_t)V_ifindex_table, M_IFNET);
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}
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V_ifindex_table = e;
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}
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static void
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if_check(void *dummy __unused)
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{
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/*
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* If at least one interface added during boot uses
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* if_watchdog then start the timer.
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*/
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if (slowtimo_started)
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if_slowtimo(0);
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}
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/*
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* Allocate a struct ifnet and an index for an interface. A layer 2
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* common structure will also be allocated if an allocation routine is
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* registered for the passed type.
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*/
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struct ifnet *
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if_alloc(u_char type)
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{
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struct ifnet *ifp;
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ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
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/*
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* Try to find an empty slot below if_index. If we fail, take
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* the next slot.
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*
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* XXX: should be locked!
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*/
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for (ifp->if_index = 1; ifp->if_index <= V_if_index; ifp->if_index++) {
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if (ifnet_byindex(ifp->if_index) == NULL)
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break;
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}
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/* Catch if_index overflow. */
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if (ifp->if_index < 1) {
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free(ifp, M_IFNET);
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return (NULL);
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}
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if (ifp->if_index > V_if_index)
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V_if_index = ifp->if_index;
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if (V_if_index >= V_if_indexlim)
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if_grow();
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ifp->if_type = type;
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ifp->if_alloctype = type;
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if (if_com_alloc[type] != NULL) {
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ifp->if_l2com = if_com_alloc[type](type, ifp);
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if (ifp->if_l2com == NULL) {
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free(ifp, M_IFNET);
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return (NULL);
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}
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}
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IF_ADDR_LOCK_INIT(ifp);
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TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
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ifp->if_afdata_initialized = 0;
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IF_AFDATA_LOCK_INIT(ifp);
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TAILQ_INIT(&ifp->if_addrhead);
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TAILQ_INIT(&ifp->if_prefixhead);
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TAILQ_INIT(&ifp->if_multiaddrs);
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TAILQ_INIT(&ifp->if_groups);
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#ifdef MAC
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mac_ifnet_init(ifp);
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#endif
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ifq_init(&ifp->if_snd, ifp);
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refcount_init(&ifp->if_refcount, 1); /* Index reference. */
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IFNET_WLOCK();
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ifnet_setbyindex(ifp->if_index, ifp);
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IFNET_WUNLOCK();
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return (ifp);
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}
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|
|
/*
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* Do the actual work of freeing a struct ifnet, associated index, and layer
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* 2 common structure. This call is made when the last reference to an
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* interface is released.
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*/
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static void
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if_free_internal(struct ifnet *ifp)
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{
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KASSERT((ifp->if_flags & IFF_DYING),
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("if_free_internal: interface not dying"));
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IFNET_WLOCK();
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KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
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("%s: freeing unallocated ifnet", ifp->if_xname));
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ifnet_setbyindex(ifp->if_index, NULL);
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while (V_if_index > 0 && ifnet_byindex_locked(V_if_index) == NULL)
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V_if_index--;
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IFNET_WUNLOCK();
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if (if_com_free[ifp->if_alloctype] != NULL)
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if_com_free[ifp->if_alloctype](ifp->if_l2com,
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ifp->if_alloctype);
|
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|
|
#ifdef MAC
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mac_ifnet_destroy(ifp);
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#endif /* MAC */
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IF_AFDATA_DESTROY(ifp);
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IF_ADDR_LOCK_DESTROY(ifp);
|
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ifq_delete(&ifp->if_snd);
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free(ifp, M_IFNET);
|
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}
|
|
|
|
/*
|
|
* This version should only be called by intefaces that switch their type
|
|
* after calling if_alloc(). if_free_type() will go away again now that we
|
|
* have if_alloctype to cache the original allocation type. For now, assert
|
|
* that they match, since we require that in practice.
|
|
*/
|
|
void
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if_free_type(struct ifnet *ifp, u_char type)
|
|
{
|
|
|
|
KASSERT(ifp->if_alloctype == type,
|
|
("if_free_type: type (%d) != alloctype (%d)", type,
|
|
ifp->if_alloctype));
|
|
|
|
ifp->if_flags |= IFF_DYING; /* XXX: Locking */
|
|
if (!refcount_release(&ifp->if_refcount))
|
|
return;
|
|
if_free_internal(ifp);
|
|
}
|
|
|
|
/*
|
|
* This is the normal version of if_free(), used by device drivers to free a
|
|
* detached network interface. The contents of if_free_type() will move into
|
|
* here when if_free_type() goes away.
|
|
*/
|
|
void
|
|
if_free(struct ifnet *ifp)
|
|
{
|
|
|
|
if_free_type(ifp, ifp->if_alloctype);
|
|
}
|
|
|
|
/*
|
|
* Interfaces to keep an ifnet type-stable despite the possibility of the
|
|
* driver calling if_free(). If there are additional references, we defer
|
|
* freeing the underlying data structure.
|
|
*/
|
|
void
|
|
if_ref(struct ifnet *ifp)
|
|
{
|
|
|
|
/* We don't assert the ifnet list lock here, but arguably should. */
|
|
refcount_acquire(&ifp->if_refcount);
|
|
}
|
|
|
|
void
|
|
if_rele(struct ifnet *ifp)
|
|
{
|
|
|
|
if (!refcount_release(&ifp->if_refcount))
|
|
return;
|
|
if_free_internal(ifp);
|
|
}
|
|
|
|
void
|
|
ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
|
|
{
|
|
|
|
mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
|
|
|
|
if (ifq->ifq_maxlen == 0)
|
|
ifq->ifq_maxlen = ifqmaxlen;
|
|
|
|
ifq->altq_type = 0;
|
|
ifq->altq_disc = NULL;
|
|
ifq->altq_flags &= ALTQF_CANTCHANGE;
|
|
ifq->altq_tbr = NULL;
|
|
ifq->altq_ifp = ifp;
|
|
}
|
|
|
|
void
|
|
ifq_delete(struct ifaltq *ifq)
|
|
{
|
|
mtx_destroy(&ifq->ifq_mtx);
|
|
}
|
|
|
|
/*
|
|
* Perform generic interface initalization tasks and attach the interface
|
|
* to the list of "active" interfaces. If vmove flag is set on entry
|
|
* to if_attach_internal(), perform only a limited subset of initialization
|
|
* tasks, given that we are moving from one vnet to another an ifnet which
|
|
* has already been fully initialized.
|
|
*
|
|
* XXX:
|
|
* - The decision to return void and thus require this function to
|
|
* succeed is questionable.
|
|
* - We should probably do more sanity checking. For instance we don't
|
|
* do anything to insure if_xname is unique or non-empty.
|
|
*/
|
|
void
|
|
if_attach(struct ifnet *ifp)
|
|
{
|
|
|
|
if_attach_internal(ifp, 0);
|
|
}
|
|
|
|
static void
|
|
if_attach_internal(struct ifnet *ifp, int vmove)
|
|
{
|
|
unsigned socksize, ifasize;
|
|
int namelen, masklen;
|
|
struct sockaddr_dl *sdl;
|
|
struct ifaddr *ifa;
|
|
|
|
if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
|
|
panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
|
|
ifp->if_xname);
|
|
|
|
#ifdef VIMAGE
|
|
ifp->if_vnet = curvnet;
|
|
if (ifp->if_home_vnet == NULL)
|
|
ifp->if_home_vnet = curvnet;
|
|
#endif
|
|
|
|
if_addgroup(ifp, IFG_ALL);
|
|
|
|
getmicrotime(&ifp->if_lastchange);
|
|
ifp->if_data.ifi_epoch = time_uptime;
|
|
ifp->if_data.ifi_datalen = sizeof(struct if_data);
|
|
|
|
KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
|
|
(ifp->if_transmit != NULL && ifp->if_qflush != NULL),
|
|
("transmit and qflush must both either be set or both be NULL"));
|
|
if (ifp->if_transmit == NULL) {
|
|
ifp->if_transmit = if_transmit;
|
|
ifp->if_qflush = if_qflush;
|
|
}
|
|
|
|
if (!vmove) {
|
|
#ifdef MAC
|
|
mac_ifnet_create(ifp);
|
|
#endif
|
|
|
|
/*
|
|
* Create a Link Level name for this device.
|
|
*/
|
|
namelen = strlen(ifp->if_xname);
|
|
/*
|
|
* Always save enough space for any possiable name so we
|
|
* can do a rename in place later.
|
|
*/
|
|
masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
|
|
socksize = masklen + ifp->if_addrlen;
|
|
if (socksize < sizeof(*sdl))
|
|
socksize = sizeof(*sdl);
|
|
socksize = roundup2(socksize, sizeof(long));
|
|
ifasize = sizeof(*ifa) + 2 * socksize;
|
|
ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
|
|
ifa_init(ifa);
|
|
sdl = (struct sockaddr_dl *)(ifa + 1);
|
|
sdl->sdl_len = socksize;
|
|
sdl->sdl_family = AF_LINK;
|
|
bcopy(ifp->if_xname, sdl->sdl_data, namelen);
|
|
sdl->sdl_nlen = namelen;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = ifp->if_type;
|
|
ifp->if_addr = ifa;
|
|
ifa->ifa_ifp = ifp;
|
|
ifa->ifa_rtrequest = link_rtrequest;
|
|
ifa->ifa_addr = (struct sockaddr *)sdl;
|
|
sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
|
|
ifa->ifa_netmask = (struct sockaddr *)sdl;
|
|
sdl->sdl_len = masklen;
|
|
while (namelen != 0)
|
|
sdl->sdl_data[--namelen] = 0xff;
|
|
TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
|
|
/* Reliably crash if used uninitialized. */
|
|
ifp->if_broadcastaddr = NULL;
|
|
}
|
|
|
|
IFNET_WLOCK();
|
|
TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
|
|
#ifdef VIMAGE
|
|
curvnet->vnet_ifcnt++;
|
|
#endif
|
|
IFNET_WUNLOCK();
|
|
|
|
if (domain_init_status >= 2)
|
|
if_attachdomain1(ifp);
|
|
|
|
EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
|
|
if (IS_DEFAULT_VNET(curvnet))
|
|
devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
|
|
|
|
/* Announce the interface. */
|
|
rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
|
|
|
|
if (!vmove && ifp->if_watchdog != NULL) {
|
|
if_printf(ifp,
|
|
"WARNING: using obsoleted if_watchdog interface\n");
|
|
|
|
/*
|
|
* Note that we need if_slowtimo(). If this happens after
|
|
* boot, then call if_slowtimo() directly.
|
|
*/
|
|
if (atomic_cmpset_int(&slowtimo_started, 0, 1) && !cold)
|
|
if_slowtimo(0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
if_attachdomain(void *dummy)
|
|
{
|
|
struct ifnet *ifp;
|
|
int s;
|
|
|
|
s = splnet();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link)
|
|
if_attachdomain1(ifp);
|
|
splx(s);
|
|
}
|
|
SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
|
|
if_attachdomain, NULL);
|
|
|
|
static void
|
|
if_attachdomain1(struct ifnet *ifp)
|
|
{
|
|
struct domain *dp;
|
|
int s;
|
|
|
|
s = splnet();
|
|
|
|
/*
|
|
* Since dp->dom_ifattach calls malloc() with M_WAITOK, we
|
|
* cannot lock ifp->if_afdata initialization, entirely.
|
|
*/
|
|
if (IF_AFDATA_TRYLOCK(ifp) == 0) {
|
|
splx(s);
|
|
return;
|
|
}
|
|
if (ifp->if_afdata_initialized >= domain_init_status) {
|
|
IF_AFDATA_UNLOCK(ifp);
|
|
splx(s);
|
|
printf("if_attachdomain called more than once on %s\n",
|
|
ifp->if_xname);
|
|
return;
|
|
}
|
|
ifp->if_afdata_initialized = domain_init_status;
|
|
IF_AFDATA_UNLOCK(ifp);
|
|
|
|
/* address family dependent data region */
|
|
bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
|
|
for (dp = domains; dp; dp = dp->dom_next) {
|
|
if (dp->dom_ifattach)
|
|
ifp->if_afdata[dp->dom_family] =
|
|
(*dp->dom_ifattach)(ifp);
|
|
}
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Remove any unicast or broadcast network addresses from an interface.
|
|
*/
|
|
void
|
|
if_purgeaddrs(struct ifnet *ifp)
|
|
{
|
|
struct ifaddr *ifa, *next;
|
|
|
|
TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
|
|
if (ifa->ifa_addr->sa_family == AF_LINK)
|
|
continue;
|
|
#ifdef INET
|
|
/* XXX: Ugly!! ad hoc just for INET */
|
|
if (ifa->ifa_addr->sa_family == AF_INET) {
|
|
struct ifaliasreq ifr;
|
|
|
|
bzero(&ifr, sizeof(ifr));
|
|
ifr.ifra_addr = *ifa->ifa_addr;
|
|
if (ifa->ifa_dstaddr)
|
|
ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
|
|
if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
|
|
NULL) == 0)
|
|
continue;
|
|
}
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
if (ifa->ifa_addr->sa_family == AF_INET6) {
|
|
in6_purgeaddr(ifa);
|
|
/* ifp_addrhead is already updated */
|
|
continue;
|
|
}
|
|
#endif /* INET6 */
|
|
TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
|
|
ifa_free(ifa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Remove any multicast network addresses from an interface.
|
|
*/
|
|
void
|
|
if_purgemaddrs(struct ifnet *ifp)
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
struct ifmultiaddr *next;
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
|
|
if_delmulti_locked(ifp, ifma, 1);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
|
|
/*
|
|
* Detach an interface, removing it from the list of "active" interfaces.
|
|
* If vmove flag is set on entry to if_detach_internal(), perform only a
|
|
* limited subset of cleanup tasks, given that we are moving an ifnet from
|
|
* one vnet to another, where it must be fully operational.
|
|
*
|
|
* XXXRW: There are some significant questions about event ordering, and
|
|
* how to prevent things from starting to use the interface during detach.
|
|
*/
|
|
void
|
|
if_detach(struct ifnet *ifp)
|
|
{
|
|
|
|
if_detach_internal(ifp, 0);
|
|
}
|
|
|
|
static void
|
|
if_detach_internal(struct ifnet *ifp, int vmove)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct radix_node_head *rnh;
|
|
int i, j;
|
|
struct domain *dp;
|
|
struct ifnet *iter;
|
|
int found = 0;
|
|
|
|
IFNET_WLOCK();
|
|
TAILQ_FOREACH(iter, &V_ifnet, if_link)
|
|
if (iter == ifp) {
|
|
TAILQ_REMOVE(&V_ifnet, ifp, if_link);
|
|
found = 1;
|
|
break;
|
|
}
|
|
#ifdef VIMAGE
|
|
if (found)
|
|
curvnet->vnet_ifcnt--;
|
|
#endif
|
|
IFNET_WUNLOCK();
|
|
if (!found) {
|
|
if (vmove)
|
|
panic("interface not in it's own ifnet list");
|
|
else
|
|
return; /* XXX this should panic as well? */
|
|
}
|
|
|
|
/*
|
|
* Remove/wait for pending events.
|
|
*/
|
|
taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
|
|
|
|
/*
|
|
* Remove routes and flush queues.
|
|
*/
|
|
if_down(ifp);
|
|
#ifdef ALTQ
|
|
if (ALTQ_IS_ENABLED(&ifp->if_snd))
|
|
altq_disable(&ifp->if_snd);
|
|
if (ALTQ_IS_ATTACHED(&ifp->if_snd))
|
|
altq_detach(&ifp->if_snd);
|
|
#endif
|
|
|
|
if_purgeaddrs(ifp);
|
|
|
|
#ifdef INET
|
|
in_ifdetach(ifp);
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
/*
|
|
* Remove all IPv6 kernel structs related to ifp. This should be done
|
|
* before removing routing entries below, since IPv6 interface direct
|
|
* routes are expected to be removed by the IPv6-specific kernel API.
|
|
* Otherwise, the kernel will detect some inconsistency and bark it.
|
|
*/
|
|
in6_ifdetach(ifp);
|
|
#endif
|
|
if_purgemaddrs(ifp);
|
|
|
|
if (!vmove) {
|
|
/*
|
|
* Prevent further calls into the device driver via ifnet.
|
|
*/
|
|
if_dead(ifp);
|
|
|
|
/*
|
|
* Remove link ifaddr pointer and maybe decrement if_index.
|
|
* Clean up all addresses.
|
|
*/
|
|
ifp->if_addr = NULL;
|
|
|
|
/* We can now free link ifaddr. */
|
|
if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
|
|
ifa = TAILQ_FIRST(&ifp->if_addrhead);
|
|
TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
|
|
ifa_free(ifa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete all remaining routes using this interface
|
|
* Unfortuneatly the only way to do this is to slog through
|
|
* the entire routing table looking for routes which point
|
|
* to this interface...oh well...
|
|
*/
|
|
for (i = 1; i <= AF_MAX; i++) {
|
|
for (j = 0; j < rt_numfibs; j++) {
|
|
rnh = rt_tables_get_rnh(j, i);
|
|
if (rnh == NULL)
|
|
continue;
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
(void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
}
|
|
}
|
|
|
|
/* Announce that the interface is gone. */
|
|
rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
|
|
EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
|
|
if (IS_DEFAULT_VNET(curvnet))
|
|
devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
|
|
if_delgroups(ifp);
|
|
|
|
IF_AFDATA_LOCK(ifp);
|
|
for (dp = domains; dp; dp = dp->dom_next) {
|
|
if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
|
|
(*dp->dom_ifdetach)(ifp,
|
|
ifp->if_afdata[dp->dom_family]);
|
|
}
|
|
ifp->if_afdata_initialized = 0;
|
|
IF_AFDATA_UNLOCK(ifp);
|
|
}
|
|
|
|
#ifdef VIMAGE
|
|
/*
|
|
* if_vmove() performs a limited version of if_detach() in current
|
|
* vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
|
|
* An attempt is made to shrink if_index in current vnet, find an
|
|
* unused if_index in target vnet and calls if_grow() if necessary,
|
|
* and finally find an unused if_xname for the target vnet.
|
|
*/
|
|
void
|
|
if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
|
|
{
|
|
|
|
/*
|
|
* Detach from current vnet, but preserve LLADDR info, do not
|
|
* mark as dead etc. so that the ifnet can be reattached later.
|
|
*/
|
|
if_detach_internal(ifp, 1);
|
|
|
|
/*
|
|
* Unlink the ifnet from ifindex_table[] in current vnet,
|
|
* and shrink the if_index for that vnet if possible.
|
|
*/
|
|
IFNET_WLOCK();
|
|
ifnet_setbyindex(ifp->if_index, NULL);
|
|
while (V_if_index > 0 && ifnet_byindex_locked(V_if_index) == NULL)
|
|
V_if_index--;
|
|
IFNET_WUNLOCK();
|
|
|
|
/*
|
|
* Switch to the context of the target vnet.
|
|
*/
|
|
CURVNET_SET_QUIET(new_vnet);
|
|
|
|
/*
|
|
* Try to find an empty slot below if_index. If we fail, take
|
|
* the next slot.
|
|
*/
|
|
IFNET_WLOCK();
|
|
for (ifp->if_index = 1; ifp->if_index <= V_if_index; ifp->if_index++) {
|
|
if (ifnet_byindex_locked(ifp->if_index) == NULL)
|
|
break;
|
|
}
|
|
/* Catch if_index overflow. */
|
|
if (ifp->if_index < 1)
|
|
panic("if_index overflow");
|
|
|
|
if (ifp->if_index > V_if_index)
|
|
V_if_index = ifp->if_index;
|
|
if (V_if_index >= V_if_indexlim)
|
|
if_grow();
|
|
ifnet_setbyindex(ifp->if_index, ifp);
|
|
IFNET_WUNLOCK();
|
|
|
|
if_attach_internal(ifp, 1);
|
|
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
/*
|
|
* Move an ifnet to or from another child prison/vnet, specified by the jail id.
|
|
*/
|
|
static int
|
|
if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
|
|
{
|
|
struct prison *pr;
|
|
struct ifnet *difp;
|
|
|
|
/* Try to find the prison within our visibility. */
|
|
sx_slock(&allprison_lock);
|
|
pr = prison_find_child(td->td_ucred->cr_prison, jid);
|
|
sx_sunlock(&allprison_lock);
|
|
if (pr == NULL)
|
|
return (ENXIO);
|
|
prison_hold_locked(pr);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
|
|
/* Do not try to move the iface from and to the same prison. */
|
|
if (pr->pr_vnet == ifp->if_vnet) {
|
|
prison_free(pr);
|
|
return (EEXIST);
|
|
}
|
|
|
|
/* Make sure the named iface does not exists in the dst. prison/vnet. */
|
|
/* XXX Lock interfaces to avoid races. */
|
|
CURVNET_SET_QUIET(pr->pr_vnet);
|
|
difp = ifunit(ifname);
|
|
CURVNET_RESTORE();
|
|
if (difp != NULL) {
|
|
prison_free(pr);
|
|
return (EEXIST);
|
|
}
|
|
|
|
/* Move the interface into the child jail/vnet. */
|
|
if_vmove(ifp, pr->pr_vnet);
|
|
|
|
/* Report the new if_xname back to the userland. */
|
|
sprintf(ifname, "%s", ifp->if_xname);
|
|
|
|
prison_free(pr);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
if_vmove_reclaim(struct thread *td, char *ifname, int jid)
|
|
{
|
|
struct prison *pr;
|
|
struct vnet *vnet_dst;
|
|
struct ifnet *ifp;
|
|
|
|
/* Try to find the prison within our visibility. */
|
|
sx_slock(&allprison_lock);
|
|
pr = prison_find_child(td->td_ucred->cr_prison, jid);
|
|
sx_sunlock(&allprison_lock);
|
|
if (pr == NULL)
|
|
return (ENXIO);
|
|
prison_hold_locked(pr);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
|
|
/* Make sure the named iface exists in the source prison/vnet. */
|
|
CURVNET_SET(pr->pr_vnet);
|
|
ifp = ifunit(ifname); /* XXX Lock to avoid races. */
|
|
if (ifp == NULL) {
|
|
CURVNET_RESTORE();
|
|
prison_free(pr);
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* Do not try to move the iface from and to the same prison. */
|
|
vnet_dst = TD_TO_VNET(td);
|
|
if (vnet_dst == ifp->if_vnet) {
|
|
CURVNET_RESTORE();
|
|
prison_free(pr);
|
|
return (EEXIST);
|
|
}
|
|
|
|
/* Get interface back from child jail/vnet. */
|
|
if_vmove(ifp, vnet_dst);
|
|
CURVNET_RESTORE();
|
|
|
|
/* Report the new if_xname back to the userland. */
|
|
sprintf(ifname, "%s", ifp->if_xname);
|
|
|
|
prison_free(pr);
|
|
return (0);
|
|
}
|
|
#endif /* VIMAGE */
|
|
|
|
/*
|
|
* Add a group to an interface
|
|
*/
|
|
int
|
|
if_addgroup(struct ifnet *ifp, const char *groupname)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
struct ifg_group *ifg = NULL;
|
|
struct ifg_member *ifgm;
|
|
|
|
if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
|
|
groupname[strlen(groupname) - 1] <= '9')
|
|
return (EINVAL);
|
|
|
|
IFNET_WLOCK();
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
|
|
if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
|
|
IFNET_WUNLOCK();
|
|
return (EEXIST);
|
|
}
|
|
|
|
if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
|
|
M_NOWAIT)) == NULL) {
|
|
IFNET_WUNLOCK();
|
|
return (ENOMEM);
|
|
}
|
|
|
|
if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
|
|
M_TEMP, M_NOWAIT)) == NULL) {
|
|
free(ifgl, M_TEMP);
|
|
IFNET_WUNLOCK();
|
|
return (ENOMEM);
|
|
}
|
|
|
|
TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
|
|
if (!strcmp(ifg->ifg_group, groupname))
|
|
break;
|
|
|
|
if (ifg == NULL) {
|
|
if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
|
|
M_TEMP, M_NOWAIT)) == NULL) {
|
|
free(ifgl, M_TEMP);
|
|
free(ifgm, M_TEMP);
|
|
IFNET_WUNLOCK();
|
|
return (ENOMEM);
|
|
}
|
|
strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
|
|
ifg->ifg_refcnt = 0;
|
|
TAILQ_INIT(&ifg->ifg_members);
|
|
EVENTHANDLER_INVOKE(group_attach_event, ifg);
|
|
TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
|
|
}
|
|
|
|
ifg->ifg_refcnt++;
|
|
ifgl->ifgl_group = ifg;
|
|
ifgm->ifgm_ifp = ifp;
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
|
|
TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
IFNET_WUNLOCK();
|
|
|
|
EVENTHANDLER_INVOKE(group_change_event, groupname);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Remove a group from an interface
|
|
*/
|
|
int
|
|
if_delgroup(struct ifnet *ifp, const char *groupname)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
struct ifg_member *ifgm;
|
|
|
|
IFNET_WLOCK();
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
|
|
if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
|
|
break;
|
|
if (ifgl == NULL) {
|
|
IFNET_WUNLOCK();
|
|
return (ENOENT);
|
|
}
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
|
|
if (ifgm->ifgm_ifp == ifp)
|
|
break;
|
|
|
|
if (ifgm != NULL) {
|
|
TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
|
|
free(ifgm, M_TEMP);
|
|
}
|
|
|
|
if (--ifgl->ifgl_group->ifg_refcnt == 0) {
|
|
TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
|
|
EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
|
|
free(ifgl->ifgl_group, M_TEMP);
|
|
}
|
|
IFNET_WUNLOCK();
|
|
|
|
free(ifgl, M_TEMP);
|
|
|
|
EVENTHANDLER_INVOKE(group_change_event, groupname);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Remove an interface from all groups
|
|
*/
|
|
static void
|
|
if_delgroups(struct ifnet *ifp)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
struct ifg_member *ifgm;
|
|
char groupname[IFNAMSIZ];
|
|
|
|
IFNET_WLOCK();
|
|
while (!TAILQ_EMPTY(&ifp->if_groups)) {
|
|
ifgl = TAILQ_FIRST(&ifp->if_groups);
|
|
|
|
strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
|
|
if (ifgm->ifgm_ifp == ifp)
|
|
break;
|
|
|
|
if (ifgm != NULL) {
|
|
TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
|
|
ifgm_next);
|
|
free(ifgm, M_TEMP);
|
|
}
|
|
|
|
if (--ifgl->ifgl_group->ifg_refcnt == 0) {
|
|
TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
|
|
EVENTHANDLER_INVOKE(group_detach_event,
|
|
ifgl->ifgl_group);
|
|
free(ifgl->ifgl_group, M_TEMP);
|
|
}
|
|
IFNET_WUNLOCK();
|
|
|
|
free(ifgl, M_TEMP);
|
|
|
|
EVENTHANDLER_INVOKE(group_change_event, groupname);
|
|
|
|
IFNET_WLOCK();
|
|
}
|
|
IFNET_WUNLOCK();
|
|
}
|
|
|
|
/*
|
|
* Stores all groups from an interface in memory pointed
|
|
* to by data
|
|
*/
|
|
static int
|
|
if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
|
|
{
|
|
int len, error;
|
|
struct ifg_list *ifgl;
|
|
struct ifg_req ifgrq, *ifgp;
|
|
struct ifgroupreq *ifgr = data;
|
|
|
|
if (ifgr->ifgr_len == 0) {
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
|
|
ifgr->ifgr_len += sizeof(struct ifg_req);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (0);
|
|
}
|
|
|
|
len = ifgr->ifgr_len;
|
|
ifgp = ifgr->ifgr_groups;
|
|
/* XXX: wire */
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
|
|
if (len < sizeof(ifgrq)) {
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (EINVAL);
|
|
}
|
|
bzero(&ifgrq, sizeof ifgrq);
|
|
strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
|
|
sizeof(ifgrq.ifgrq_group));
|
|
if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (error);
|
|
}
|
|
len -= sizeof(ifgrq);
|
|
ifgp++;
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Stores all members of a group in memory pointed to by data
|
|
*/
|
|
static int
|
|
if_getgroupmembers(struct ifgroupreq *data)
|
|
{
|
|
struct ifgroupreq *ifgr = data;
|
|
struct ifg_group *ifg;
|
|
struct ifg_member *ifgm;
|
|
struct ifg_req ifgrq, *ifgp;
|
|
int len, error;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
|
|
if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
|
|
break;
|
|
if (ifg == NULL) {
|
|
IFNET_RUNLOCK();
|
|
return (ENOENT);
|
|
}
|
|
|
|
if (ifgr->ifgr_len == 0) {
|
|
TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
|
|
ifgr->ifgr_len += sizeof(ifgrq);
|
|
IFNET_RUNLOCK();
|
|
return (0);
|
|
}
|
|
|
|
len = ifgr->ifgr_len;
|
|
ifgp = ifgr->ifgr_groups;
|
|
TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
|
|
if (len < sizeof(ifgrq)) {
|
|
IFNET_RUNLOCK();
|
|
return (EINVAL);
|
|
}
|
|
bzero(&ifgrq, sizeof ifgrq);
|
|
strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
|
|
sizeof(ifgrq.ifgrq_member));
|
|
if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
|
|
IFNET_RUNLOCK();
|
|
return (error);
|
|
}
|
|
len -= sizeof(ifgrq);
|
|
ifgp++;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Delete Routes for a Network Interface
|
|
*
|
|
* Called for each routing entry via the rnh->rnh_walktree() call above
|
|
* to delete all route entries referencing a detaching network interface.
|
|
*
|
|
* Arguments:
|
|
* rn pointer to node in the routing table
|
|
* arg argument passed to rnh->rnh_walktree() - detaching interface
|
|
*
|
|
* Returns:
|
|
* 0 successful
|
|
* errno failed - reason indicated
|
|
*
|
|
*/
|
|
static int
|
|
if_rtdel(struct radix_node *rn, void *arg)
|
|
{
|
|
struct rtentry *rt = (struct rtentry *)rn;
|
|
struct ifnet *ifp = arg;
|
|
int err;
|
|
|
|
if (rt->rt_ifp == ifp) {
|
|
|
|
/*
|
|
* Protect (sorta) against walktree recursion problems
|
|
* with cloned routes
|
|
*/
|
|
if ((rt->rt_flags & RTF_UP) == 0)
|
|
return (0);
|
|
|
|
err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway,
|
|
rt_mask(rt), rt->rt_flags|RTF_RNH_LOCKED,
|
|
(struct rtentry **) NULL, rt->rt_fibnum);
|
|
if (err) {
|
|
log(LOG_WARNING, "if_rtdel: error %d\n", err);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Wrapper functions for struct ifnet address list locking macros. These are
|
|
* used by kernel modules to avoid encoding programming interface or binary
|
|
* interface assumptions that may be violated when kernel-internal locking
|
|
* approaches change.
|
|
*/
|
|
void
|
|
if_addr_rlock(struct ifnet *ifp)
|
|
{
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
}
|
|
|
|
void
|
|
if_addr_runlock(struct ifnet *ifp)
|
|
{
|
|
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
|
|
void
|
|
if_maddr_rlock(struct ifnet *ifp)
|
|
{
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
}
|
|
|
|
void
|
|
if_maddr_runlock(struct ifnet *ifp)
|
|
{
|
|
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
|
|
/*
|
|
* Reference count functions for ifaddrs.
|
|
*/
|
|
void
|
|
ifa_init(struct ifaddr *ifa)
|
|
{
|
|
|
|
mtx_init(&ifa->ifa_mtx, "ifaddr", NULL, MTX_DEF);
|
|
refcount_init(&ifa->ifa_refcnt, 1);
|
|
}
|
|
|
|
void
|
|
ifa_ref(struct ifaddr *ifa)
|
|
{
|
|
|
|
refcount_acquire(&ifa->ifa_refcnt);
|
|
}
|
|
|
|
void
|
|
ifa_free(struct ifaddr *ifa)
|
|
{
|
|
|
|
if (refcount_release(&ifa->ifa_refcnt)) {
|
|
mtx_destroy(&ifa->ifa_mtx);
|
|
free(ifa, M_IFADDR);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX: Because sockaddr_dl has deeper structure than the sockaddr
|
|
* structs used to represent other address families, it is necessary
|
|
* to perform a different comparison.
|
|
*/
|
|
|
|
#define sa_equal(a1, a2) \
|
|
(bcmp((a1), (a2), ((a1))->sa_len) == 0)
|
|
|
|
#define sa_dl_equal(a1, a2) \
|
|
((((struct sockaddr_dl *)(a1))->sdl_len == \
|
|
((struct sockaddr_dl *)(a2))->sdl_len) && \
|
|
(bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
|
|
LLADDR((struct sockaddr_dl *)(a2)), \
|
|
((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
|
|
|
|
/*
|
|
* Locate an interface based on a complete address.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static struct ifaddr *
|
|
ifa_ifwithaddr_internal(struct sockaddr *addr, int getref)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family != addr->sa_family)
|
|
continue;
|
|
if (sa_equal(addr, ifa->ifa_addr)) {
|
|
if (getref)
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
/* IP6 doesn't have broadcast */
|
|
if ((ifp->if_flags & IFF_BROADCAST) &&
|
|
ifa->ifa_broadaddr &&
|
|
ifa->ifa_broadaddr->sa_len != 0 &&
|
|
sa_equal(ifa->ifa_broadaddr, addr)) {
|
|
if (getref)
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
ifa = NULL;
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
return (ifa);
|
|
}
|
|
|
|
struct ifaddr *
|
|
ifa_ifwithaddr(struct sockaddr *addr)
|
|
{
|
|
|
|
return (ifa_ifwithaddr_internal(addr, 1));
|
|
}
|
|
|
|
int
|
|
ifa_ifwithaddr_check(struct sockaddr *addr)
|
|
{
|
|
|
|
return (ifa_ifwithaddr_internal(addr, 0) != NULL);
|
|
}
|
|
|
|
/*
|
|
* Locate an interface based on the broadcast address.
|
|
*/
|
|
/* ARGSUSED */
|
|
struct ifaddr *
|
|
ifa_ifwithbroadaddr(struct sockaddr *addr)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family != addr->sa_family)
|
|
continue;
|
|
if ((ifp->if_flags & IFF_BROADCAST) &&
|
|
ifa->ifa_broadaddr &&
|
|
ifa->ifa_broadaddr->sa_len != 0 &&
|
|
sa_equal(ifa->ifa_broadaddr, addr)) {
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
ifa = NULL;
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
return (ifa);
|
|
}
|
|
|
|
/*
|
|
* Locate the point to point interface with a given destination address.
|
|
*/
|
|
/*ARGSUSED*/
|
|
struct ifaddr *
|
|
ifa_ifwithdstaddr(struct sockaddr *addr)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
|
|
continue;
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family != addr->sa_family)
|
|
continue;
|
|
if (ifa->ifa_dstaddr != NULL &&
|
|
sa_equal(addr, ifa->ifa_dstaddr)) {
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
ifa = NULL;
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
return (ifa);
|
|
}
|
|
|
|
/*
|
|
* Find an interface on a specific network. If many, choice
|
|
* is most specific found.
|
|
*/
|
|
struct ifaddr *
|
|
ifa_ifwithnet(struct sockaddr *addr)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct ifaddr *ifa_maybe = NULL;
|
|
u_int af = addr->sa_family;
|
|
char *addr_data = addr->sa_data, *cplim;
|
|
|
|
/*
|
|
* AF_LINK addresses can be looked up directly by their index number,
|
|
* so do that if we can.
|
|
*/
|
|
if (af == AF_LINK) {
|
|
struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
|
|
if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
|
|
return (ifaddr_byindex(sdl->sdl_index));
|
|
}
|
|
|
|
/*
|
|
* Scan though each interface, looking for ones that have addresses
|
|
* in this address family. Maintain a reference on ifa_maybe once
|
|
* we find one, as we release the IF_ADDR_LOCK() that kept it stable
|
|
* when we move onto the next interface.
|
|
*/
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
char *cp, *cp2, *cp3;
|
|
|
|
if (ifa->ifa_addr->sa_family != af)
|
|
next: continue;
|
|
if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
|
|
/*
|
|
* This is a bit broken as it doesn't
|
|
* take into account that the remote end may
|
|
* be a single node in the network we are
|
|
* looking for.
|
|
* The trouble is that we don't know the
|
|
* netmask for the remote end.
|
|
*/
|
|
if (ifa->ifa_dstaddr != NULL &&
|
|
sa_equal(addr, ifa->ifa_dstaddr)) {
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
} else {
|
|
/*
|
|
* if we have a special address handler,
|
|
* then use it instead of the generic one.
|
|
*/
|
|
if (ifa->ifa_claim_addr) {
|
|
if ((*ifa->ifa_claim_addr)(ifa, addr)) {
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Scan all the bits in the ifa's address.
|
|
* If a bit dissagrees with what we are
|
|
* looking for, mask it with the netmask
|
|
* to see if it really matters.
|
|
* (A byte at a time)
|
|
*/
|
|
if (ifa->ifa_netmask == 0)
|
|
continue;
|
|
cp = addr_data;
|
|
cp2 = ifa->ifa_addr->sa_data;
|
|
cp3 = ifa->ifa_netmask->sa_data;
|
|
cplim = ifa->ifa_netmask->sa_len
|
|
+ (char *)ifa->ifa_netmask;
|
|
while (cp3 < cplim)
|
|
if ((*cp++ ^ *cp2++) & *cp3++)
|
|
goto next; /* next address! */
|
|
/*
|
|
* If the netmask of what we just found
|
|
* is more specific than what we had before
|
|
* (if we had one) then remember the new one
|
|
* before continuing to search
|
|
* for an even better one.
|
|
*/
|
|
if (ifa_maybe == NULL ||
|
|
rn_refines((caddr_t)ifa->ifa_netmask,
|
|
(caddr_t)ifa_maybe->ifa_netmask)) {
|
|
if (ifa_maybe != NULL)
|
|
ifa_free(ifa_maybe);
|
|
ifa_maybe = ifa;
|
|
ifa_ref(ifa_maybe);
|
|
}
|
|
}
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
ifa = ifa_maybe;
|
|
ifa_maybe = NULL;
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
if (ifa_maybe != NULL)
|
|
ifa_free(ifa_maybe);
|
|
return (ifa);
|
|
}
|
|
|
|
/*
|
|
* Find an interface address specific to an interface best matching
|
|
* a given address.
|
|
*/
|
|
struct ifaddr *
|
|
ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
|
|
{
|
|
struct ifaddr *ifa;
|
|
char *cp, *cp2, *cp3;
|
|
char *cplim;
|
|
struct ifaddr *ifa_maybe = NULL;
|
|
u_int af = addr->sa_family;
|
|
|
|
if (af >= AF_MAX)
|
|
return (0);
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family != af)
|
|
continue;
|
|
if (ifa_maybe == NULL)
|
|
ifa_maybe = ifa;
|
|
if (ifa->ifa_netmask == 0) {
|
|
if (sa_equal(addr, ifa->ifa_addr) ||
|
|
(ifa->ifa_dstaddr &&
|
|
sa_equal(addr, ifa->ifa_dstaddr)))
|
|
goto done;
|
|
continue;
|
|
}
|
|
if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
if (sa_equal(addr, ifa->ifa_dstaddr))
|
|
goto done;
|
|
} else {
|
|
cp = addr->sa_data;
|
|
cp2 = ifa->ifa_addr->sa_data;
|
|
cp3 = ifa->ifa_netmask->sa_data;
|
|
cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
|
|
for (; cp3 < cplim; cp3++)
|
|
if ((*cp++ ^ *cp2++) & *cp3)
|
|
break;
|
|
if (cp3 == cplim)
|
|
goto done;
|
|
}
|
|
}
|
|
ifa = ifa_maybe;
|
|
done:
|
|
if (ifa != NULL)
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (ifa);
|
|
}
|
|
|
|
#include <net/if_llatbl.h>
|
|
|
|
/*
|
|
* Default action when installing a route with a Link Level gateway.
|
|
* Lookup an appropriate real ifa to point to.
|
|
* This should be moved to /sys/net/link.c eventually.
|
|
*/
|
|
static void
|
|
link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
|
|
{
|
|
struct ifaddr *ifa, *oifa;
|
|
struct sockaddr *dst;
|
|
struct ifnet *ifp;
|
|
|
|
RT_LOCK_ASSERT(rt);
|
|
|
|
if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
|
|
((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
|
|
return;
|
|
ifa = ifaof_ifpforaddr(dst, ifp);
|
|
if (ifa) {
|
|
oifa = rt->rt_ifa;
|
|
rt->rt_ifa = ifa;
|
|
ifa_free(oifa);
|
|
if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
|
|
ifa->ifa_rtrequest(cmd, rt, info);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Mark an interface down and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splnet or eqivalent.
|
|
*/
|
|
static void
|
|
if_unroute(struct ifnet *ifp, int flag, int fam)
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
|
|
|
|
ifp->if_flags &= ~flag;
|
|
getmicrotime(&ifp->if_lastchange);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
|
|
if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
|
|
pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
|
|
ifp->if_qflush(ifp);
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef DEV_CARP
|
|
if (ifp->if_carp)
|
|
carp_carpdev_state(ifp->if_carp);
|
|
#endif
|
|
#endif
|
|
rt_ifmsg(ifp);
|
|
}
|
|
|
|
/*
|
|
* Mark an interface up and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splnet or eqivalent.
|
|
*/
|
|
static void
|
|
if_route(struct ifnet *ifp, int flag, int fam)
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
|
|
|
|
ifp->if_flags |= flag;
|
|
getmicrotime(&ifp->if_lastchange);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
|
|
if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
|
|
pfctlinput(PRC_IFUP, ifa->ifa_addr);
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef DEV_CARP
|
|
if (ifp->if_carp)
|
|
carp_carpdev_state(ifp->if_carp);
|
|
#endif
|
|
#endif
|
|
rt_ifmsg(ifp);
|
|
#ifdef INET6
|
|
in6_if_up(ifp);
|
|
#endif
|
|
}
|
|
|
|
void (*vlan_link_state_p)(struct ifnet *, int); /* XXX: private from if_vlan */
|
|
void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
|
|
|
|
/*
|
|
* Handle a change in the interface link state. To avoid LORs
|
|
* between driver lock and upper layer locks, as well as possible
|
|
* recursions, we post event to taskqueue, and all job
|
|
* is done in static do_link_state_change().
|
|
*/
|
|
void
|
|
if_link_state_change(struct ifnet *ifp, int link_state)
|
|
{
|
|
/* Return if state hasn't changed. */
|
|
if (ifp->if_link_state == link_state)
|
|
return;
|
|
|
|
ifp->if_link_state = link_state;
|
|
|
|
taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
|
|
}
|
|
|
|
static void
|
|
do_link_state_change(void *arg, int pending)
|
|
{
|
|
struct ifnet *ifp = (struct ifnet *)arg;
|
|
int link_state = ifp->if_link_state;
|
|
int link;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
|
|
/* Notify that the link state has changed. */
|
|
rt_ifmsg(ifp);
|
|
if (link_state == LINK_STATE_UP)
|
|
link = NOTE_LINKUP;
|
|
else if (link_state == LINK_STATE_DOWN)
|
|
link = NOTE_LINKDOWN;
|
|
else
|
|
link = NOTE_LINKINV;
|
|
if (ifp->if_vlantrunk != NULL)
|
|
(*vlan_link_state_p)(ifp, link);
|
|
|
|
if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
|
|
IFP2AC(ifp)->ac_netgraph != NULL)
|
|
(*ng_ether_link_state_p)(ifp, link_state);
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef DEV_CARP
|
|
if (ifp->if_carp)
|
|
carp_carpdev_state(ifp->if_carp);
|
|
#endif
|
|
#endif
|
|
if (ifp->if_bridge) {
|
|
KASSERT(bstp_linkstate_p != NULL,("if_bridge bstp not loaded!"));
|
|
(*bstp_linkstate_p)(ifp, link_state);
|
|
}
|
|
if (ifp->if_lagg) {
|
|
KASSERT(lagg_linkstate_p != NULL,("if_lagg not loaded!"));
|
|
(*lagg_linkstate_p)(ifp, link_state);
|
|
}
|
|
|
|
if (IS_DEFAULT_VNET(curvnet))
|
|
devctl_notify("IFNET", ifp->if_xname,
|
|
(link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
|
|
NULL);
|
|
if (pending > 1)
|
|
if_printf(ifp, "%d link states coalesced\n", pending);
|
|
if (log_link_state_change)
|
|
log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
|
|
(link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
/*
|
|
* Mark an interface down and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splnet or eqivalent.
|
|
*/
|
|
void
|
|
if_down(struct ifnet *ifp)
|
|
{
|
|
|
|
if_unroute(ifp, IFF_UP, AF_UNSPEC);
|
|
}
|
|
|
|
/*
|
|
* Mark an interface up and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splnet or eqivalent.
|
|
*/
|
|
void
|
|
if_up(struct ifnet *ifp)
|
|
{
|
|
|
|
if_route(ifp, IFF_UP, AF_UNSPEC);
|
|
}
|
|
|
|
/*
|
|
* Flush an interface queue.
|
|
*/
|
|
void
|
|
if_qflush(struct ifnet *ifp)
|
|
{
|
|
struct mbuf *m, *n;
|
|
struct ifaltq *ifq;
|
|
|
|
ifq = &ifp->if_snd;
|
|
IFQ_LOCK(ifq);
|
|
#ifdef ALTQ
|
|
if (ALTQ_IS_ENABLED(ifq))
|
|
ALTQ_PURGE(ifq);
|
|
#endif
|
|
n = ifq->ifq_head;
|
|
while ((m = n) != 0) {
|
|
n = m->m_act;
|
|
m_freem(m);
|
|
}
|
|
ifq->ifq_head = 0;
|
|
ifq->ifq_tail = 0;
|
|
ifq->ifq_len = 0;
|
|
IFQ_UNLOCK(ifq);
|
|
}
|
|
|
|
/*
|
|
* Handle interface watchdog timer routines. Called
|
|
* from softclock, we decrement timers (if set) and
|
|
* call the appropriate interface routine on expiration.
|
|
*
|
|
* XXXRW: Note that because timeouts run with Giant, if_watchdog() is called
|
|
* holding Giant.
|
|
*/
|
|
static void
|
|
if_slowtimo(void *arg)
|
|
{
|
|
VNET_ITERATOR_DECL(vnet_iter);
|
|
struct ifnet *ifp;
|
|
int s = splimp();
|
|
|
|
VNET_LIST_RLOCK_NOSLEEP();
|
|
IFNET_RLOCK();
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter);
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (ifp->if_timer == 0 || --ifp->if_timer)
|
|
continue;
|
|
if (ifp->if_watchdog)
|
|
(*ifp->if_watchdog)(ifp);
|
|
}
|
|
CURVNET_RESTORE();
|
|
}
|
|
IFNET_RUNLOCK();
|
|
VNET_LIST_RUNLOCK_NOSLEEP();
|
|
splx(s);
|
|
timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
|
|
}
|
|
|
|
/*
|
|
* Map interface name to interface structure pointer, with or without
|
|
* returning a reference.
|
|
*/
|
|
struct ifnet *
|
|
ifunit_ref(const char *name)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
|
|
!(ifp->if_flags & IFF_DYING))
|
|
break;
|
|
}
|
|
if (ifp != NULL)
|
|
if_ref(ifp);
|
|
IFNET_RUNLOCK();
|
|
return (ifp);
|
|
}
|
|
|
|
struct ifnet *
|
|
ifunit(const char *name)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
|
|
break;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
return (ifp);
|
|
}
|
|
|
|
/*
|
|
* Hardware specific interface ioctls.
|
|
*/
|
|
static int
|
|
ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
|
|
{
|
|
struct ifreq *ifr;
|
|
struct ifstat *ifs;
|
|
int error = 0;
|
|
int new_flags, temp_flags;
|
|
size_t namelen, onamelen;
|
|
char new_name[IFNAMSIZ];
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_dl *sdl;
|
|
|
|
ifr = (struct ifreq *)data;
|
|
switch (cmd) {
|
|
case SIOCGIFINDEX:
|
|
ifr->ifr_index = ifp->if_index;
|
|
break;
|
|
|
|
case SIOCGIFFLAGS:
|
|
temp_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifr->ifr_flags = temp_flags & 0xffff;
|
|
ifr->ifr_flagshigh = temp_flags >> 16;
|
|
break;
|
|
|
|
case SIOCGIFCAP:
|
|
ifr->ifr_reqcap = ifp->if_capabilities;
|
|
ifr->ifr_curcap = ifp->if_capenable;
|
|
break;
|
|
|
|
#ifdef MAC
|
|
case SIOCGIFMAC:
|
|
error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
|
|
break;
|
|
#endif
|
|
|
|
case SIOCGIFMETRIC:
|
|
ifr->ifr_metric = ifp->if_metric;
|
|
break;
|
|
|
|
case SIOCGIFMTU:
|
|
ifr->ifr_mtu = ifp->if_mtu;
|
|
break;
|
|
|
|
case SIOCGIFPHYS:
|
|
ifr->ifr_phys = ifp->if_physical;
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
error = priv_check(td, PRIV_NET_SETIFFLAGS);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* Currently, no driver owned flags pass the IFF_CANTCHANGE
|
|
* check, so we don't need special handling here yet.
|
|
*/
|
|
new_flags = (ifr->ifr_flags & 0xffff) |
|
|
(ifr->ifr_flagshigh << 16);
|
|
if (ifp->if_flags & IFF_SMART) {
|
|
/* Smart drivers twiddle their own routes */
|
|
} else if (ifp->if_flags & IFF_UP &&
|
|
(new_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_down(ifp);
|
|
splx(s);
|
|
} else if (new_flags & IFF_UP &&
|
|
(ifp->if_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_up(ifp);
|
|
splx(s);
|
|
}
|
|
/* See if permanently promiscuous mode bit is about to flip */
|
|
if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
|
|
if (new_flags & IFF_PPROMISC)
|
|
ifp->if_flags |= IFF_PROMISC;
|
|
else if (ifp->if_pcount == 0)
|
|
ifp->if_flags &= ~IFF_PROMISC;
|
|
log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
|
|
ifp->if_xname,
|
|
(new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
|
|
}
|
|
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
|
|
(new_flags &~ IFF_CANTCHANGE);
|
|
if (ifp->if_ioctl) {
|
|
(void) (*ifp->if_ioctl)(ifp, cmd, data);
|
|
}
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFCAP:
|
|
error = priv_check(td, PRIV_NET_SETIFCAP);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
if (ifr->ifr_reqcap & ~ifp->if_capabilities)
|
|
return (EINVAL);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
#ifdef MAC
|
|
case SIOCSIFMAC:
|
|
error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
|
|
break;
|
|
#endif
|
|
|
|
case SIOCSIFNAME:
|
|
error = priv_check(td, PRIV_NET_SETIFNAME);
|
|
if (error)
|
|
return (error);
|
|
error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
if (new_name[0] == '\0')
|
|
return (EINVAL);
|
|
if (ifunit(new_name) != NULL)
|
|
return (EEXIST);
|
|
|
|
/* Announce the departure of the interface. */
|
|
rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
|
|
EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
|
|
|
|
log(LOG_INFO, "%s: changing name to '%s'\n",
|
|
ifp->if_xname, new_name);
|
|
|
|
strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
|
|
ifa = ifp->if_addr;
|
|
IFA_LOCK(ifa);
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
namelen = strlen(new_name);
|
|
onamelen = sdl->sdl_nlen;
|
|
/*
|
|
* Move the address if needed. This is safe because we
|
|
* allocate space for a name of length IFNAMSIZ when we
|
|
* create this in if_attach().
|
|
*/
|
|
if (namelen != onamelen) {
|
|
bcopy(sdl->sdl_data + onamelen,
|
|
sdl->sdl_data + namelen, sdl->sdl_alen);
|
|
}
|
|
bcopy(new_name, sdl->sdl_data, namelen);
|
|
sdl->sdl_nlen = namelen;
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
|
|
bzero(sdl->sdl_data, onamelen);
|
|
while (namelen != 0)
|
|
sdl->sdl_data[--namelen] = 0xff;
|
|
IFA_UNLOCK(ifa);
|
|
|
|
EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
|
|
/* Announce the return of the interface. */
|
|
rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
|
|
break;
|
|
|
|
#ifdef VIMAGE
|
|
case SIOCSIFVNET:
|
|
error = priv_check(td, PRIV_NET_SETIFVNET);
|
|
if (error)
|
|
return (error);
|
|
error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
|
|
break;
|
|
#endif
|
|
|
|
case SIOCSIFMETRIC:
|
|
error = priv_check(td, PRIV_NET_SETIFMETRIC);
|
|
if (error)
|
|
return (error);
|
|
ifp->if_metric = ifr->ifr_metric;
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFPHYS:
|
|
error = priv_check(td, PRIV_NET_SETIFPHYS);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
{
|
|
u_long oldmtu = ifp->if_mtu;
|
|
|
|
error = priv_check(td, PRIV_NET_SETIFMTU);
|
|
if (error)
|
|
return (error);
|
|
if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
|
|
return (EINVAL);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0) {
|
|
getmicrotime(&ifp->if_lastchange);
|
|
rt_ifmsg(ifp);
|
|
}
|
|
/*
|
|
* If the link MTU changed, do network layer specific procedure.
|
|
*/
|
|
if (ifp->if_mtu != oldmtu) {
|
|
#ifdef INET6
|
|
nd6_setmtu(ifp);
|
|
#endif
|
|
}
|
|
break;
|
|
}
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (cmd == SIOCADDMULTI)
|
|
error = priv_check(td, PRIV_NET_ADDMULTI);
|
|
else
|
|
error = priv_check(td, PRIV_NET_DELMULTI);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Don't allow group membership on non-multicast interfaces. */
|
|
if ((ifp->if_flags & IFF_MULTICAST) == 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
/* Don't let users screw up protocols' entries. */
|
|
if (ifr->ifr_addr.sa_family != AF_LINK)
|
|
return (EINVAL);
|
|
|
|
if (cmd == SIOCADDMULTI) {
|
|
struct ifmultiaddr *ifma;
|
|
|
|
/*
|
|
* Userland is only permitted to join groups once
|
|
* via the if_addmulti() KPI, because it cannot hold
|
|
* struct ifmultiaddr * between calls. It may also
|
|
* lose a race while we check if the membership
|
|
* already exists.
|
|
*/
|
|
IF_ADDR_LOCK(ifp);
|
|
ifma = if_findmulti(ifp, &ifr->ifr_addr);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
if (ifma != NULL)
|
|
error = EADDRINUSE;
|
|
else
|
|
error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
|
|
} else {
|
|
error = if_delmulti(ifp, &ifr->ifr_addr);
|
|
}
|
|
if (error == 0)
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFPHYADDR:
|
|
case SIOCDIFPHYADDR:
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
#endif
|
|
case SIOCSLIFPHYADDR:
|
|
case SIOCSIFMEDIA:
|
|
case SIOCSIFGENERIC:
|
|
error = priv_check(td, PRIV_NET_HWIOCTL);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
getmicrotime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCGIFSTATUS:
|
|
ifs = (struct ifstat *)data;
|
|
ifs->ascii[0] = '\0';
|
|
|
|
case SIOCGIFPSRCADDR:
|
|
case SIOCGIFPDSTADDR:
|
|
case SIOCGLIFPHYADDR:
|
|
case SIOCGIFMEDIA:
|
|
case SIOCGIFGENERIC:
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
break;
|
|
|
|
case SIOCSIFLLADDR:
|
|
error = priv_check(td, PRIV_NET_SETLLADDR);
|
|
if (error)
|
|
return (error);
|
|
error = if_setlladdr(ifp,
|
|
ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
|
|
break;
|
|
|
|
case SIOCAIFGROUP:
|
|
{
|
|
struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
|
|
|
|
error = priv_check(td, PRIV_NET_ADDIFGROUP);
|
|
if (error)
|
|
return (error);
|
|
if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
|
|
return (error);
|
|
break;
|
|
}
|
|
|
|
case SIOCGIFGROUP:
|
|
if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
|
|
return (error);
|
|
break;
|
|
|
|
case SIOCDIFGROUP:
|
|
{
|
|
struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
|
|
|
|
error = priv_check(td, PRIV_NET_DELIFGROUP);
|
|
if (error)
|
|
return (error);
|
|
if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
|
|
return (error);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
error = ENOIOCTL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Interface ioctls.
|
|
*/
|
|
int
|
|
ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifreq *ifr;
|
|
int error;
|
|
int oif_flags;
|
|
|
|
switch (cmd) {
|
|
case SIOCGIFCONF:
|
|
case OSIOCGIFCONF:
|
|
#ifdef __amd64__
|
|
case SIOCGIFCONF32:
|
|
#endif
|
|
return (ifconf(cmd, data));
|
|
}
|
|
ifr = (struct ifreq *)data;
|
|
|
|
switch (cmd) {
|
|
#ifdef VIMAGE
|
|
case SIOCSIFRVNET:
|
|
error = priv_check(td, PRIV_NET_SETIFVNET);
|
|
if (error)
|
|
return (error);
|
|
return (if_vmove_reclaim(td, ifr->ifr_name, ifr->ifr_jid));
|
|
#endif
|
|
case SIOCIFCREATE:
|
|
case SIOCIFCREATE2:
|
|
error = priv_check(td, PRIV_NET_IFCREATE);
|
|
if (error)
|
|
return (error);
|
|
return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name),
|
|
cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL));
|
|
case SIOCIFDESTROY:
|
|
error = priv_check(td, PRIV_NET_IFDESTROY);
|
|
if (error)
|
|
return (error);
|
|
return if_clone_destroy(ifr->ifr_name);
|
|
|
|
case SIOCIFGCLONERS:
|
|
return (if_clone_list((struct if_clonereq *)data));
|
|
case SIOCGIFGMEMB:
|
|
return (if_getgroupmembers((struct ifgroupreq *)data));
|
|
}
|
|
|
|
ifp = ifunit_ref(ifr->ifr_name);
|
|
if (ifp == NULL)
|
|
return (ENXIO);
|
|
|
|
error = ifhwioctl(cmd, ifp, data, td);
|
|
if (error != ENOIOCTL) {
|
|
if_rele(ifp);
|
|
return (error);
|
|
}
|
|
|
|
oif_flags = ifp->if_flags;
|
|
if (so->so_proto == NULL) {
|
|
if_rele(ifp);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
#ifndef COMPAT_43
|
|
error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
|
|
data,
|
|
ifp, td));
|
|
if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL)
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
#else
|
|
{
|
|
u_long ocmd = cmd;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCSIFADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCSIFNETMASK:
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
if (ifr->ifr_addr.sa_family == 0 &&
|
|
ifr->ifr_addr.sa_len < 16) {
|
|
ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
|
|
ifr->ifr_addr.sa_len = 16;
|
|
}
|
|
#else
|
|
if (ifr->ifr_addr.sa_len == 0)
|
|
ifr->ifr_addr.sa_len = 16;
|
|
#endif
|
|
break;
|
|
|
|
case OSIOCGIFADDR:
|
|
cmd = SIOCGIFADDR;
|
|
break;
|
|
|
|
case OSIOCGIFDSTADDR:
|
|
cmd = SIOCGIFDSTADDR;
|
|
break;
|
|
|
|
case OSIOCGIFBRDADDR:
|
|
cmd = SIOCGIFBRDADDR;
|
|
break;
|
|
|
|
case OSIOCGIFNETMASK:
|
|
cmd = SIOCGIFNETMASK;
|
|
}
|
|
error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
|
|
cmd,
|
|
data,
|
|
ifp, td));
|
|
if (error == EOPNOTSUPP && ifp != NULL &&
|
|
ifp->if_ioctl != NULL)
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
switch (ocmd) {
|
|
|
|
case OSIOCGIFADDR:
|
|
case OSIOCGIFDSTADDR:
|
|
case OSIOCGIFBRDADDR:
|
|
case OSIOCGIFNETMASK:
|
|
*(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
|
|
|
|
}
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
|
|
#ifdef INET6
|
|
if (ifp->if_flags & IFF_UP) {
|
|
int s = splimp();
|
|
in6_if_up(ifp);
|
|
splx(s);
|
|
}
|
|
#endif
|
|
}
|
|
if_rele(ifp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* The code common to handling reference counted flags,
|
|
* e.g., in ifpromisc() and if_allmulti().
|
|
* The "pflag" argument can specify a permanent mode flag to check,
|
|
* such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
|
|
*
|
|
* Only to be used on stack-owned flags, not driver-owned flags.
|
|
*/
|
|
static int
|
|
if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
|
|
{
|
|
struct ifreq ifr;
|
|
int error;
|
|
int oldflags, oldcount;
|
|
|
|
/* Sanity checks to catch programming errors */
|
|
KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
|
|
("%s: setting driver-owned flag %d", __func__, flag));
|
|
|
|
if (onswitch)
|
|
KASSERT(*refcount >= 0,
|
|
("%s: increment negative refcount %d for flag %d",
|
|
__func__, *refcount, flag));
|
|
else
|
|
KASSERT(*refcount > 0,
|
|
("%s: decrement non-positive refcount %d for flag %d",
|
|
__func__, *refcount, flag));
|
|
|
|
/* In case this mode is permanent, just touch refcount */
|
|
if (ifp->if_flags & pflag) {
|
|
*refcount += onswitch ? 1 : -1;
|
|
return (0);
|
|
}
|
|
|
|
/* Save ifnet parameters for if_ioctl() may fail */
|
|
oldcount = *refcount;
|
|
oldflags = ifp->if_flags;
|
|
|
|
/*
|
|
* See if we aren't the only and touching refcount is enough.
|
|
* Actually toggle interface flag if we are the first or last.
|
|
*/
|
|
if (onswitch) {
|
|
if ((*refcount)++)
|
|
return (0);
|
|
ifp->if_flags |= flag;
|
|
} else {
|
|
if (--(*refcount))
|
|
return (0);
|
|
ifp->if_flags &= ~flag;
|
|
}
|
|
|
|
/* Call down the driver since we've changed interface flags */
|
|
if (ifp->if_ioctl == NULL) {
|
|
error = EOPNOTSUPP;
|
|
goto recover;
|
|
}
|
|
ifr.ifr_flags = ifp->if_flags & 0xffff;
|
|
ifr.ifr_flagshigh = ifp->if_flags >> 16;
|
|
error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
|
|
if (error)
|
|
goto recover;
|
|
/* Notify userland that interface flags have changed */
|
|
rt_ifmsg(ifp);
|
|
return (0);
|
|
|
|
recover:
|
|
/* Recover after driver error */
|
|
*refcount = oldcount;
|
|
ifp->if_flags = oldflags;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set/clear promiscuous mode on interface ifp based on the truth value
|
|
* of pswitch. The calls are reference counted so that only the first
|
|
* "on" request actually has an effect, as does the final "off" request.
|
|
* Results are undefined if the "off" and "on" requests are not matched.
|
|
*/
|
|
int
|
|
ifpromisc(struct ifnet *ifp, int pswitch)
|
|
{
|
|
int error;
|
|
int oldflags = ifp->if_flags;
|
|
|
|
error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
|
|
&ifp->if_pcount, pswitch);
|
|
/* If promiscuous mode status has changed, log a message */
|
|
if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
|
|
log(LOG_INFO, "%s: promiscuous mode %s\n",
|
|
ifp->if_xname,
|
|
(ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return interface configuration
|
|
* of system. List may be used
|
|
* in later ioctl's (above) to get
|
|
* other information.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static int
|
|
ifconf(u_long cmd, caddr_t data)
|
|
{
|
|
struct ifconf *ifc = (struct ifconf *)data;
|
|
#ifdef __amd64__
|
|
struct ifconf32 *ifc32 = (struct ifconf32 *)data;
|
|
struct ifconf ifc_swab;
|
|
#endif
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct ifreq ifr;
|
|
struct sbuf *sb;
|
|
int error, full = 0, valid_len, max_len;
|
|
|
|
#ifdef __amd64__
|
|
if (cmd == SIOCGIFCONF32) {
|
|
ifc_swab.ifc_len = ifc32->ifc_len;
|
|
ifc_swab.ifc_buf = (caddr_t)(uintptr_t)ifc32->ifc_buf;
|
|
ifc = &ifc_swab;
|
|
}
|
|
#endif
|
|
/* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
|
|
max_len = MAXPHYS - 1;
|
|
|
|
/* Prevent hostile input from being able to crash the system */
|
|
if (ifc->ifc_len <= 0)
|
|
return (EINVAL);
|
|
|
|
again:
|
|
if (ifc->ifc_len <= max_len) {
|
|
max_len = ifc->ifc_len;
|
|
full = 1;
|
|
}
|
|
sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
|
|
max_len = 0;
|
|
valid_len = 0;
|
|
|
|
IFNET_RLOCK(); /* could sleep XXX */
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
int addrs;
|
|
|
|
/*
|
|
* Zero the ifr_name buffer to make sure we don't
|
|
* disclose the contents of the stack.
|
|
*/
|
|
memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
|
|
|
|
if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
|
|
>= sizeof(ifr.ifr_name)) {
|
|
sbuf_delete(sb);
|
|
IFNET_RUNLOCK();
|
|
return (ENAMETOOLONG);
|
|
}
|
|
|
|
addrs = 0;
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
struct sockaddr *sa = ifa->ifa_addr;
|
|
|
|
if (prison_if(curthread->td_ucred, sa) != 0)
|
|
continue;
|
|
addrs++;
|
|
#ifdef COMPAT_43
|
|
if (cmd == OSIOCGIFCONF) {
|
|
struct osockaddr *osa =
|
|
(struct osockaddr *)&ifr.ifr_addr;
|
|
ifr.ifr_addr = *sa;
|
|
osa->sa_family = sa->sa_family;
|
|
sbuf_bcat(sb, &ifr, sizeof(ifr));
|
|
max_len += sizeof(ifr);
|
|
} else
|
|
#endif
|
|
if (sa->sa_len <= sizeof(*sa)) {
|
|
ifr.ifr_addr = *sa;
|
|
sbuf_bcat(sb, &ifr, sizeof(ifr));
|
|
max_len += sizeof(ifr);
|
|
} else {
|
|
sbuf_bcat(sb, &ifr,
|
|
offsetof(struct ifreq, ifr_addr));
|
|
max_len += offsetof(struct ifreq, ifr_addr);
|
|
sbuf_bcat(sb, sa, sa->sa_len);
|
|
max_len += sa->sa_len;
|
|
}
|
|
|
|
if (!sbuf_overflowed(sb))
|
|
valid_len = sbuf_len(sb);
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
if (addrs == 0) {
|
|
bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
|
|
sbuf_bcat(sb, &ifr, sizeof(ifr));
|
|
max_len += sizeof(ifr);
|
|
|
|
if (!sbuf_overflowed(sb))
|
|
valid_len = sbuf_len(sb);
|
|
}
|
|
}
|
|
IFNET_RUNLOCK();
|
|
|
|
/*
|
|
* If we didn't allocate enough space (uncommon), try again. If
|
|
* we have already allocated as much space as we are allowed,
|
|
* return what we've got.
|
|
*/
|
|
if (valid_len != max_len && !full) {
|
|
sbuf_delete(sb);
|
|
goto again;
|
|
}
|
|
|
|
ifc->ifc_len = valid_len;
|
|
#ifdef __amd64__
|
|
if (cmd == SIOCGIFCONF32)
|
|
ifc32->ifc_len = valid_len;
|
|
#endif
|
|
sbuf_finish(sb);
|
|
error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
|
|
sbuf_delete(sb);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Just like ifpromisc(), but for all-multicast-reception mode.
|
|
*/
|
|
int
|
|
if_allmulti(struct ifnet *ifp, int onswitch)
|
|
{
|
|
|
|
return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
|
|
}
|
|
|
|
struct ifmultiaddr *
|
|
if_findmulti(struct ifnet *ifp, struct sockaddr *sa)
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
|
|
IF_ADDR_LOCK_ASSERT(ifp);
|
|
|
|
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
|
|
if (sa->sa_family == AF_LINK) {
|
|
if (sa_dl_equal(ifma->ifma_addr, sa))
|
|
break;
|
|
} else {
|
|
if (sa_equal(ifma->ifma_addr, sa))
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ifma;
|
|
}
|
|
|
|
/*
|
|
* Allocate a new ifmultiaddr and initialize based on passed arguments. We
|
|
* make copies of passed sockaddrs. The ifmultiaddr will not be added to
|
|
* the ifnet multicast address list here, so the caller must do that and
|
|
* other setup work (such as notifying the device driver). The reference
|
|
* count is initialized to 1.
|
|
*/
|
|
static struct ifmultiaddr *
|
|
if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
|
|
int mflags)
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
struct sockaddr *dupsa;
|
|
|
|
ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
|
|
M_ZERO);
|
|
if (ifma == NULL)
|
|
return (NULL);
|
|
|
|
dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
|
|
if (dupsa == NULL) {
|
|
free(ifma, M_IFMADDR);
|
|
return (NULL);
|
|
}
|
|
bcopy(sa, dupsa, sa->sa_len);
|
|
ifma->ifma_addr = dupsa;
|
|
|
|
ifma->ifma_ifp = ifp;
|
|
ifma->ifma_refcount = 1;
|
|
ifma->ifma_protospec = NULL;
|
|
|
|
if (llsa == NULL) {
|
|
ifma->ifma_lladdr = NULL;
|
|
return (ifma);
|
|
}
|
|
|
|
dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
|
|
if (dupsa == NULL) {
|
|
free(ifma->ifma_addr, M_IFMADDR);
|
|
free(ifma, M_IFMADDR);
|
|
return (NULL);
|
|
}
|
|
bcopy(llsa, dupsa, llsa->sa_len);
|
|
ifma->ifma_lladdr = dupsa;
|
|
|
|
return (ifma);
|
|
}
|
|
|
|
/*
|
|
* if_freemulti: free ifmultiaddr structure and possibly attached related
|
|
* addresses. The caller is responsible for implementing reference
|
|
* counting, notifying the driver, handling routing messages, and releasing
|
|
* any dependent link layer state.
|
|
*/
|
|
static void
|
|
if_freemulti(struct ifmultiaddr *ifma)
|
|
{
|
|
|
|
KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
|
|
ifma->ifma_refcount));
|
|
KASSERT(ifma->ifma_protospec == NULL,
|
|
("if_freemulti: protospec not NULL"));
|
|
|
|
if (ifma->ifma_lladdr != NULL)
|
|
free(ifma->ifma_lladdr, M_IFMADDR);
|
|
free(ifma->ifma_addr, M_IFMADDR);
|
|
free(ifma, M_IFMADDR);
|
|
}
|
|
|
|
/*
|
|
* Register an additional multicast address with a network interface.
|
|
*
|
|
* - If the address is already present, bump the reference count on the
|
|
* address and return.
|
|
* - If the address is not link-layer, look up a link layer address.
|
|
* - Allocate address structures for one or both addresses, and attach to the
|
|
* multicast address list on the interface. If automatically adding a link
|
|
* layer address, the protocol address will own a reference to the link
|
|
* layer address, to be freed when it is freed.
|
|
* - Notify the network device driver of an addition to the multicast address
|
|
* list.
|
|
*
|
|
* 'sa' points to caller-owned memory with the desired multicast address.
|
|
*
|
|
* 'retifma' will be used to return a pointer to the resulting multicast
|
|
* address reference, if desired.
|
|
*/
|
|
int
|
|
if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
|
|
struct ifmultiaddr **retifma)
|
|
{
|
|
struct ifmultiaddr *ifma, *ll_ifma;
|
|
struct sockaddr *llsa;
|
|
int error;
|
|
|
|
/*
|
|
* If the address is already present, return a new reference to it;
|
|
* otherwise, allocate storage and set up a new address.
|
|
*/
|
|
IF_ADDR_LOCK(ifp);
|
|
ifma = if_findmulti(ifp, sa);
|
|
if (ifma != NULL) {
|
|
ifma->ifma_refcount++;
|
|
if (retifma != NULL)
|
|
*retifma = ifma;
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The address isn't already present; resolve the protocol address
|
|
* into a link layer address, and then look that up, bump its
|
|
* refcount or allocate an ifma for that also. If 'llsa' was
|
|
* returned, we will need to free it later.
|
|
*/
|
|
llsa = NULL;
|
|
ll_ifma = NULL;
|
|
if (ifp->if_resolvemulti != NULL) {
|
|
error = ifp->if_resolvemulti(ifp, &llsa, sa);
|
|
if (error)
|
|
goto unlock_out;
|
|
}
|
|
|
|
/*
|
|
* Allocate the new address. Don't hook it up yet, as we may also
|
|
* need to allocate a link layer multicast address.
|
|
*/
|
|
ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
|
|
if (ifma == NULL) {
|
|
error = ENOMEM;
|
|
goto free_llsa_out;
|
|
}
|
|
|
|
/*
|
|
* If a link layer address is found, we'll need to see if it's
|
|
* already present in the address list, or allocate is as well.
|
|
* When this block finishes, the link layer address will be on the
|
|
* list.
|
|
*/
|
|
if (llsa != NULL) {
|
|
ll_ifma = if_findmulti(ifp, llsa);
|
|
if (ll_ifma == NULL) {
|
|
ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
|
|
if (ll_ifma == NULL) {
|
|
--ifma->ifma_refcount;
|
|
if_freemulti(ifma);
|
|
error = ENOMEM;
|
|
goto free_llsa_out;
|
|
}
|
|
TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
|
|
ifma_link);
|
|
} else
|
|
ll_ifma->ifma_refcount++;
|
|
ifma->ifma_llifma = ll_ifma;
|
|
}
|
|
|
|
/*
|
|
* We now have a new multicast address, ifma, and possibly a new or
|
|
* referenced link layer address. Add the primary address to the
|
|
* ifnet address list.
|
|
*/
|
|
TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
|
|
|
|
if (retifma != NULL)
|
|
*retifma = ifma;
|
|
|
|
/*
|
|
* Must generate the message while holding the lock so that 'ifma'
|
|
* pointer is still valid.
|
|
*/
|
|
rt_newmaddrmsg(RTM_NEWMADDR, ifma);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
/*
|
|
* We are certain we have added something, so call down to the
|
|
* interface to let them know about it.
|
|
*/
|
|
if (ifp->if_ioctl != NULL) {
|
|
(void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
|
|
}
|
|
|
|
if (llsa != NULL)
|
|
free(llsa, M_IFMADDR);
|
|
|
|
return (0);
|
|
|
|
free_llsa_out:
|
|
if (llsa != NULL)
|
|
free(llsa, M_IFMADDR);
|
|
|
|
unlock_out:
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a multicast group membership by network-layer group address.
|
|
*
|
|
* Returns ENOENT if the entry could not be found. If ifp no longer
|
|
* exists, results are undefined. This entry point should only be used
|
|
* from subsystems which do appropriate locking to hold ifp for the
|
|
* duration of the call.
|
|
* Network-layer protocol domains must use if_delmulti_ifma().
|
|
*/
|
|
int
|
|
if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
int lastref;
|
|
#ifdef INVARIANTS
|
|
struct ifnet *oifp;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(oifp, &V_ifnet, if_link)
|
|
if (ifp == oifp)
|
|
break;
|
|
if (ifp != oifp)
|
|
ifp = NULL;
|
|
IFNET_RUNLOCK();
|
|
|
|
KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
|
|
#endif
|
|
if (ifp == NULL)
|
|
return (ENOENT);
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
lastref = 0;
|
|
ifma = if_findmulti(ifp, sa);
|
|
if (ifma != NULL)
|
|
lastref = if_delmulti_locked(ifp, ifma, 0);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
if (ifma == NULL)
|
|
return (ENOENT);
|
|
|
|
if (lastref && ifp->if_ioctl != NULL) {
|
|
(void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Delete a multicast group membership by group membership pointer.
|
|
* Network-layer protocol domains must use this routine.
|
|
*
|
|
* It is safe to call this routine if the ifp disappeared.
|
|
*/
|
|
void
|
|
if_delmulti_ifma(struct ifmultiaddr *ifma)
|
|
{
|
|
struct ifnet *ifp;
|
|
int lastref;
|
|
|
|
ifp = ifma->ifma_ifp;
|
|
#ifdef DIAGNOSTIC
|
|
if (ifp == NULL) {
|
|
printf("%s: ifma_ifp seems to be detached\n", __func__);
|
|
} else {
|
|
struct ifnet *oifp;
|
|
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(oifp, &V_ifnet, if_link)
|
|
if (ifp == oifp)
|
|
break;
|
|
if (ifp != oifp) {
|
|
printf("%s: ifnet %p disappeared\n", __func__, ifp);
|
|
ifp = NULL;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
}
|
|
#endif
|
|
/*
|
|
* If and only if the ifnet instance exists: Acquire the address lock.
|
|
*/
|
|
if (ifp != NULL)
|
|
IF_ADDR_LOCK(ifp);
|
|
|
|
lastref = if_delmulti_locked(ifp, ifma, 0);
|
|
|
|
if (ifp != NULL) {
|
|
/*
|
|
* If and only if the ifnet instance exists:
|
|
* Release the address lock.
|
|
* If the group was left: update the hardware hash filter.
|
|
*/
|
|
IF_ADDR_UNLOCK(ifp);
|
|
if (lastref && ifp->if_ioctl != NULL) {
|
|
(void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Perform deletion of network-layer and/or link-layer multicast address.
|
|
*
|
|
* Return 0 if the reference count was decremented.
|
|
* Return 1 if the final reference was released, indicating that the
|
|
* hardware hash filter should be reprogrammed.
|
|
*/
|
|
static int
|
|
if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
|
|
{
|
|
struct ifmultiaddr *ll_ifma;
|
|
|
|
if (ifp != NULL && ifma->ifma_ifp != NULL) {
|
|
KASSERT(ifma->ifma_ifp == ifp,
|
|
("%s: inconsistent ifp %p", __func__, ifp));
|
|
IF_ADDR_LOCK_ASSERT(ifp);
|
|
}
|
|
|
|
ifp = ifma->ifma_ifp;
|
|
|
|
/*
|
|
* If the ifnet is detaching, null out references to ifnet,
|
|
* so that upper protocol layers will notice, and not attempt
|
|
* to obtain locks for an ifnet which no longer exists. The
|
|
* routing socket announcement must happen before the ifnet
|
|
* instance is detached from the system.
|
|
*/
|
|
if (detaching) {
|
|
#ifdef DIAGNOSTIC
|
|
printf("%s: detaching ifnet instance %p\n", __func__, ifp);
|
|
#endif
|
|
/*
|
|
* ifp may already be nulled out if we are being reentered
|
|
* to delete the ll_ifma.
|
|
*/
|
|
if (ifp != NULL) {
|
|
rt_newmaddrmsg(RTM_DELMADDR, ifma);
|
|
ifma->ifma_ifp = NULL;
|
|
}
|
|
}
|
|
|
|
if (--ifma->ifma_refcount > 0)
|
|
return 0;
|
|
|
|
/*
|
|
* If this ifma is a network-layer ifma, a link-layer ifma may
|
|
* have been associated with it. Release it first if so.
|
|
*/
|
|
ll_ifma = ifma->ifma_llifma;
|
|
if (ll_ifma != NULL) {
|
|
KASSERT(ifma->ifma_lladdr != NULL,
|
|
("%s: llifma w/o lladdr", __func__));
|
|
if (detaching)
|
|
ll_ifma->ifma_ifp = NULL; /* XXX */
|
|
if (--ll_ifma->ifma_refcount == 0) {
|
|
if (ifp != NULL) {
|
|
TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
|
|
ifma_link);
|
|
}
|
|
if_freemulti(ll_ifma);
|
|
}
|
|
}
|
|
|
|
if (ifp != NULL)
|
|
TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
|
|
|
|
if_freemulti(ifma);
|
|
|
|
/*
|
|
* The last reference to this instance of struct ifmultiaddr
|
|
* was released; the hardware should be notified of this change.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Set the link layer address on an interface.
|
|
*
|
|
* At this time we only support certain types of interfaces,
|
|
* and we don't allow the length of the address to change.
|
|
*/
|
|
int
|
|
if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
struct ifaddr *ifa;
|
|
struct ifreq ifr;
|
|
|
|
IF_ADDR_LOCK(ifp);
|
|
ifa = ifp->if_addr;
|
|
if (ifa == NULL) {
|
|
IF_ADDR_UNLOCK(ifp);
|
|
return (EINVAL);
|
|
}
|
|
ifa_ref(ifa);
|
|
IF_ADDR_UNLOCK(ifp);
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
if (sdl == NULL) {
|
|
ifa_free(ifa);
|
|
return (EINVAL);
|
|
}
|
|
if (len != sdl->sdl_alen) { /* don't allow length to change */
|
|
ifa_free(ifa);
|
|
return (EINVAL);
|
|
}
|
|
switch (ifp->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_FDDI:
|
|
case IFT_XETHER:
|
|
case IFT_ISO88025:
|
|
case IFT_L2VLAN:
|
|
case IFT_BRIDGE:
|
|
case IFT_ARCNET:
|
|
case IFT_IEEE8023ADLAG:
|
|
case IFT_IEEE80211:
|
|
bcopy(lladdr, LLADDR(sdl), len);
|
|
ifa_free(ifa);
|
|
break;
|
|
default:
|
|
ifa_free(ifa);
|
|
return (ENODEV);
|
|
}
|
|
|
|
/*
|
|
* If the interface is already up, we need
|
|
* to re-init it in order to reprogram its
|
|
* address filter.
|
|
*/
|
|
if ((ifp->if_flags & IFF_UP) != 0) {
|
|
if (ifp->if_ioctl) {
|
|
ifp->if_flags &= ~IFF_UP;
|
|
ifr.ifr_flags = ifp->if_flags & 0xffff;
|
|
ifr.ifr_flagshigh = ifp->if_flags >> 16;
|
|
(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
|
|
ifp->if_flags |= IFF_UP;
|
|
ifr.ifr_flags = ifp->if_flags & 0xffff;
|
|
ifr.ifr_flagshigh = ifp->if_flags >> 16;
|
|
(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
|
|
}
|
|
#ifdef INET
|
|
/*
|
|
* Also send gratuitous ARPs to notify other nodes about
|
|
* the address change.
|
|
*/
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family == AF_INET)
|
|
arp_ifinit(ifp, ifa);
|
|
}
|
|
#endif
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The name argument must be a pointer to storage which will last as
|
|
* long as the interface does. For physical devices, the result of
|
|
* device_get_name(dev) is a good choice and for pseudo-devices a
|
|
* static string works well.
|
|
*/
|
|
void
|
|
if_initname(struct ifnet *ifp, const char *name, int unit)
|
|
{
|
|
ifp->if_dname = name;
|
|
ifp->if_dunit = unit;
|
|
if (unit != IF_DUNIT_NONE)
|
|
snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
|
|
else
|
|
strlcpy(ifp->if_xname, name, IFNAMSIZ);
|
|
}
|
|
|
|
int
|
|
if_printf(struct ifnet *ifp, const char * fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int retval;
|
|
|
|
retval = printf("%s: ", ifp->if_xname);
|
|
va_start(ap, fmt);
|
|
retval += vprintf(fmt, ap);
|
|
va_end(ap);
|
|
return (retval);
|
|
}
|
|
|
|
void
|
|
if_start(struct ifnet *ifp)
|
|
{
|
|
|
|
(*(ifp)->if_start)(ifp);
|
|
}
|
|
|
|
/*
|
|
* Backwards compatibility interface for drivers
|
|
* that have not implemented it
|
|
*/
|
|
static int
|
|
if_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
int error;
|
|
|
|
IFQ_HANDOFF(ifp, m, error);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
|
|
{
|
|
int active = 0;
|
|
|
|
IF_LOCK(ifq);
|
|
if (_IF_QFULL(ifq)) {
|
|
_IF_DROP(ifq);
|
|
IF_UNLOCK(ifq);
|
|
m_freem(m);
|
|
return (0);
|
|
}
|
|
if (ifp != NULL) {
|
|
ifp->if_obytes += m->m_pkthdr.len + adjust;
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
ifp->if_omcasts++;
|
|
active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
|
|
}
|
|
_IF_ENQUEUE(ifq, m);
|
|
IF_UNLOCK(ifq);
|
|
if (ifp != NULL && !active)
|
|
(*(ifp)->if_start)(ifp);
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
if_register_com_alloc(u_char type,
|
|
if_com_alloc_t *a, if_com_free_t *f)
|
|
{
|
|
|
|
KASSERT(if_com_alloc[type] == NULL,
|
|
("if_register_com_alloc: %d already registered", type));
|
|
KASSERT(if_com_free[type] == NULL,
|
|
("if_register_com_alloc: %d free already registered", type));
|
|
|
|
if_com_alloc[type] = a;
|
|
if_com_free[type] = f;
|
|
}
|
|
|
|
void
|
|
if_deregister_com_alloc(u_char type)
|
|
{
|
|
|
|
KASSERT(if_com_alloc[type] != NULL,
|
|
("if_deregister_com_alloc: %d not registered", type));
|
|
KASSERT(if_com_free[type] != NULL,
|
|
("if_deregister_com_alloc: %d free not registered", type));
|
|
if_com_alloc[type] = NULL;
|
|
if_com_free[type] = NULL;
|
|
}
|