532 lines
21 KiB
C
532 lines
21 KiB
C
/*
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* Copyright (c) 2000-2021 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1985, 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* @(#)in_var.h 8.2 (Berkeley) 1/9/95
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*/
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#ifndef _NETINET_IN_VAR_H_
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#define _NETINET_IN_VAR_H_
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#include <sys/appleapiopts.h>
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#include <sys/queue.h>
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#include <sys/kern_event.h>
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#include <net/if_var.h>
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#include <net/net_kev.h>
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#include <netinet/in.h>
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#ifdef BSD_KERNEL_PRIVATE
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#include <net/route.h>
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/*
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* Interface address, Internet version. One of these structures
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* is allocated for each Internet address on an interface.
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* The ifaddr structure contains the protocol-independent part
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* of the structure and is assumed to be first.
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*/
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struct in_ifaddr {
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struct ifaddr ia_ifa; /* protocol-independent info */
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#define ia_ifp ia_ifa.ifa_ifp
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#define ia_flags ia_ifa.ifa_flags
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/* ia_{,sub}net{,mask} in host order */
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u_int32_t ia_net; /* network number of interface */
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u_int32_t ia_netmask; /* mask of net part */
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u_int32_t ia_subnet; /* subnet number, including net */
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u_int32_t ia_subnetmask; /* mask of subnet part */
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struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
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TAILQ_ENTRY(in_ifaddr) ia_link; /* tailq macro glue */
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struct sockaddr_in ia_addr; /* reserve space for interface name */
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struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
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#define ia_broadaddr ia_dstaddr
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struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
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TAILQ_ENTRY(in_ifaddr) ia_hash; /* hash bucket entry */
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};
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#define ifatoia(ifa) ((struct in_ifaddr *)(void *)(ifa))
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#endif /* BSD_KERNEL_PRIVATE */
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struct in_aliasreq {
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char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct sockaddr_in ifra_addr;
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struct sockaddr_in ifra_broadaddr;
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#define ifra_dstaddr ifra_broadaddr
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struct sockaddr_in ifra_mask;
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};
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/*
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* Event data, inet style.
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*/
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struct kev_in_data {
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struct net_event_data link_data;
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struct in_addr ia_addr; /* interface address */
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u_int32_t ia_net; /* network number of interface */
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u_int32_t ia_netmask; /* mask of net part */
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u_int32_t ia_subnet; /* subnet number, including net */
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u_int32_t ia_subnetmask; /* mask of subnet part */
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struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
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struct in_addr ia_dstaddr;
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};
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struct kev_in_collision {
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struct net_event_data link_data; /* link where ARP was received on */
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struct in_addr ia_ipaddr; /* conflicting IP address */
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u_char hw_len; /* length of hardware address */
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u_char hw_addr[0]; /* variable length hardware address */
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};
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struct kev_in_arpfailure {
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struct net_event_data link_data; /* link where ARP is being sent */
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};
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struct kev_in_arpalive {
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struct net_event_data link_data; /* link where ARP was received */
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};
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#ifdef PRIVATE
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/*
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* Common structure for KEV_SOCKET_SUBCLASS
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* Have to place here to avoid declaration dependencies.
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*/
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struct kev_socket_event_data {
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union sockaddr_in_4_6 kev_sockname;
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union sockaddr_in_4_6 kev_peername;
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};
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struct kev_socket_closed {
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struct kev_socket_event_data ev_data;
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};
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#endif /* PRIVATE */
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#ifdef __APPLE_API_PRIVATE
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struct kev_in_portinuse {
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u_int16_t port; /* conflicting port number in host order */
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u_int32_t req_pid; /* PID port requestor */
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u_int32_t reserved[2];
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};
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#endif /* __APPLE_API_PRIVATE */
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#ifdef BSD_KERNEL_PRIVATE
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extern void socket_post_kev_msg(uint32_t, struct kev_socket_event_data *,
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uint32_t);
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extern void socket_post_kev_msg_closed(struct socket *);
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#include <net/if.h>
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#include <net/if_var.h>
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#include <kern/locks.h>
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#include <sys/tree.h>
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/*
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* Given a pointer to an in_ifaddr (ifaddr),
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* return a pointer to the addr as a sockaddr_in.
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*/
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#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
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#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
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#define IN_LNAOF(in, ifa) \
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((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
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/*
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* Hash table for IPv4 addresses.
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*/
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extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
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TAILQ_HEAD(in_ifaddrhashhead, in_ifaddr);
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extern lck_rw_t in_ifaddr_rwlock;
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#define INADDR_HASH(x) inaddr_hashlookup(x)
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extern u_char inetctlerrmap[];
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/*
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* Macro for finding the interface (ifnet structure) corresponding to one
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* of our IP addresses.
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*/
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#define INADDR_TO_IFP(addr, ifp) \
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/* struct in_addr addr; */ \
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/* struct ifnet *ifp; */ \
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{ \
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struct in_ifaddr *ia; \
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\
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lck_rw_lock_shared(&in_ifaddr_rwlock); \
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TAILQ_FOREACH(ia, INADDR_HASH((addr).s_addr), ia_hash) { \
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IFA_LOCK_SPIN(&ia->ia_ifa); \
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if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) { \
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IFA_UNLOCK(&ia->ia_ifa); \
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break; \
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} \
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IFA_UNLOCK(&ia->ia_ifa); \
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} \
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(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
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lck_rw_done(&in_ifaddr_rwlock); \
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}
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/*
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* Macro for finding the internet address structure (in_ifaddr) corresponding
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* to a given interface (ifnet structure). Caller is responsible for freeing
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* the reference.
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*/
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#define IFP_TO_IA(ifp, ia) \
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/* struct ifnet *ifp; */ \
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/* struct in_ifaddr *ia; */ \
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{ \
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lck_rw_lock_shared(&in_ifaddr_rwlock); \
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for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \
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(ia) != NULL && (ia)->ia_ifp != (ifp); \
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(ia) = TAILQ_NEXT((ia), ia_link)) \
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continue; \
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if ((ia) != NULL) \
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ifa_addref(&(ia)->ia_ifa); \
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lck_rw_done(&in_ifaddr_rwlock); \
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}
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/*
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* This information should be part of the ifnet structure but we don't wish
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* to change that - as it might break a number of things
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*/
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/*
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* Legacy IPv4 IGMP per-link structure.
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*/
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struct router_info {
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struct ifnet *rti_ifp;
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int rti_type; /* type of router which is querier on this interface */
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int rti_time; /* # of slow timeouts since last old query */
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SLIST_ENTRY(router_info) rti_list;
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};
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/*
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* IPv4 multicast IGMP-layer source entry.
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*/
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struct ip_msource {
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RB_ENTRY(ip_msource) ims_link; /* RB tree links */
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in_addr_t ims_haddr; /* host byte order */
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struct ims_st {
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uint16_t ex; /* # of exclusive members */
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uint16_t in; /* # of inclusive members */
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} ims_st[2]; /* state at t0, t1 */
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uint8_t ims_stp; /* pending query */
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};
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/*
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* IPv4 multicast PCB-layer source entry.
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*/
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struct in_msource {
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RB_ENTRY(ip_msource) ims_link; /* RB tree links */
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in_addr_t ims_haddr; /* host byte order */
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uint8_t imsl_st[2]; /* state before/at commit */
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};
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RB_HEAD(ip_msource_tree, ip_msource); /* define struct ip_msource_tree */
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RB_PROTOTYPE_SC_PREV(__private_extern__, ip_msource_tree, ip_msource,
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ims_link, ip_msource_cmp);
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/*
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* IPv4 multicast PCB-layer group filter descriptor.
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*/
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struct in_mfilter {
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struct ip_msource_tree imf_sources; /* source list for (S,G) */
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u_long imf_nsrc; /* # of source entries */
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uint8_t imf_st[2]; /* state before/at commit */
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};
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struct igmp_ifinfo;
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/*
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* IPv4 group descriptor.
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*
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* For every entry on an ifnet's if_multiaddrs list which represents
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* an IP multicast group, there is one of these structures.
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*
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* If any source filters are present, then a node will exist in the RB-tree
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* to permit fast lookup by source whenever an operation takes place.
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* This permits pre-order traversal when we issue reports.
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* Source filter trees are kept separately from the socket layer to
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* greatly simplify locking.
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*
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* When IGMPv3 is active, inm_timer is the response to group query timer.
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* The state-change timer inm_sctimer is separate; whenever state changes
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* for the group the state change record is generated and transmitted,
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* and kept if retransmissions are necessary.
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*
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* The request count here is a count of requests for this address, not a
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* count of pointers to this structure.
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*
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* FUTURE: inm_link is now only used when groups are being purged
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* on a detaching ifnet. It could be demoted to a SLIST_ENTRY.
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*/
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struct in_multi {
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decl_lck_mtx_data(, inm_lock);
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u_int32_t inm_refcount; /* reference count */
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u_int32_t inm_reqcnt; /* request count for this address */
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u_int32_t inm_debug; /* see ifa_debug flags */
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LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
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struct in_addr inm_addr; /* IP multicast address, convenience */
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struct ifnet *inm_ifp; /* back pointer to ifnet */
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struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
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u_int inm_timer; /* IGMPv1/v2 group / v3 query timer */
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u_int inm_state; /* state of the membership */
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bool inm_in_nrele; /* if in nrele list */
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/* New fields for IGMPv3 follow. */
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struct igmp_ifinfo *inm_igi; /* IGMP info */
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SLIST_ENTRY(in_multi) inm_dtle; /* detached waiting for rele */
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SLIST_ENTRY(in_multi) inm_nrele; /* to-be-released by IGMP */
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u_int32_t inm_nrelecnt; /* deferred release count */
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struct ip_msource_tree inm_srcs; /* tree of sources */
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u_long inm_nsrc; /* # of tree entries */
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struct ifqueue inm_scq; /* queue of pending
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* state-change packets */
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struct timeval inm_lastgsrtv; /* Time of last G-S-R query */
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uint16_t inm_sctimer; /* state-change timer */
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uint16_t inm_scrv; /* state-change rexmit count */
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/*
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* SSM state counters which track state at T0 (the time the last
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* state-change report's RV timer went to zero) and T1
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* (time of pending report, i.e. now).
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* Used for computing IGMPv3 state-change reports. Several refcounts
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* are maintained here to optimize for common use-cases.
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*/
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struct inm_st {
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uint16_t iss_fmode; /* IGMP filter mode */
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uint16_t iss_asm; /* # of ASM listeners */
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uint16_t iss_ex; /* # of exclusive members */
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uint16_t iss_in; /* # of inclusive members */
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uint16_t iss_rec; /* # of recorded sources */
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} inm_st[2]; /* state at t0, t1 */
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void (*inm_trace) /* callback fn for tracing refs */
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(struct in_multi *, int);
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};
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#define INM_LOCK_ASSERT_HELD(_inm) \
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LCK_MTX_ASSERT(&(_inm)->inm_lock, LCK_MTX_ASSERT_OWNED)
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#define INM_LOCK_ASSERT_NOTHELD(_inm) \
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LCK_MTX_ASSERT(&(_inm)->inm_lock, LCK_MTX_ASSERT_NOTOWNED)
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#define INM_LOCK(_inm) \
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lck_mtx_lock(&(_inm)->inm_lock)
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#define INM_LOCK_SPIN(_inm) \
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lck_mtx_lock_spin(&(_inm)->inm_lock)
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#define INM_CONVERT_LOCK(_inm) do { \
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INM_LOCK_ASSERT_HELD(_inm); \
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lck_mtx_convert_spin(&(_inm)->inm_lock); \
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} while (0)
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#define INM_UNLOCK(_inm) \
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lck_mtx_unlock(&(_inm)->inm_lock)
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#define INM_ADDREF(_inm) \
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inm_addref(_inm, 0)
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#define INM_ADDREF_LOCKED(_inm) \
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inm_addref(_inm, 1)
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#define INM_REMREF(_inm) \
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inm_remref(_inm, 0)
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#define INM_REMREF_LOCKED(_inm) \
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inm_remref(_inm, 1)
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_net_inet_ip);
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SYSCTL_DECL(_net_inet_raw);
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#endif
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extern LIST_HEAD(in_multihead, in_multi) in_multihead;
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/*
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* Structure used by macros below to remember position when stepping through
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* all of the in_multi records.
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*/
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struct in_multistep {
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struct in_multi *i_inm;
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};
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/*
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* Macro for looking up the in_multi record for a given IP multicast address
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* on a given interface. If no matching record is found, "inm" is set null.
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*
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* We do this differently compared other BSD implementations; instead of
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* walking the if_multiaddrs list at the interface and returning the
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* ifma_protospec value of a matching entry, we search the global list
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* of in_multi records and find it that way. Otherwise either the two
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* structures (in_multi, ifmultiaddr) need to be ref counted both ways,
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* which will make things too complicated, or they need to reside in the
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* same protected domain, which they aren't.
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*
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* Must be called with in_multihead_lock held.
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*/
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#define IN_LOOKUP_MULTI(addr, ifp, inm) \
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/* struct in_addr *addr; */ \
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/* struct ifnet *ifp; */ \
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/* struct in_multi *inm; */ \
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do { \
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struct in_multistep _step; \
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IN_FIRST_MULTI(_step, inm); \
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while ((inm) != NULL) { \
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INM_LOCK_SPIN(inm); \
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if ((inm)->inm_ifp == (ifp) && \
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(inm)->inm_addr.s_addr == (addr)->s_addr) { \
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INM_ADDREF_LOCKED(inm); \
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INM_UNLOCK(inm); \
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break; \
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} \
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INM_UNLOCK(inm); \
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IN_NEXT_MULTI(_step, inm); \
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} \
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} while (0)
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/*
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* Macro to step through all of the in_multi records, one at a time.
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* The current position is remembered in "step", which the caller must
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* provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
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* and get the first record. Both macros return a NULL "inm" when there
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* are no remaining records.
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*
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* Must be called with in_multihead_lock held.
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*/
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#define IN_NEXT_MULTI(step, inm) \
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/* struct in_multistep step; */ \
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/* struct in_multi *inm; */ \
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do { \
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in_multihead_lock_assert(LCK_RW_ASSERT_HELD); \
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if (((inm) = (step).i_inm) != NULL) \
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(step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
|
|
} while (0)
|
|
|
|
#define IN_FIRST_MULTI(step, inm) \
|
|
/* struct in_multistep step; */ \
|
|
/* struct in_multi *inm; */ \
|
|
do { \
|
|
in_multihead_lock_assert(LCK_RW_ASSERT_HELD); \
|
|
(step).i_inm = LIST_FIRST(&in_multihead); \
|
|
IN_NEXT_MULTI((step), (inm)); \
|
|
} while (0)
|
|
|
|
extern lck_mtx_t *inet_domain_mutex;
|
|
extern struct domain *inetdomain;
|
|
|
|
struct ip_moptions;
|
|
struct inpcb;
|
|
|
|
/*
|
|
* Return values for imo_multi_filter().
|
|
*/
|
|
#define MCAST_PASS 0 /* Pass */
|
|
#define MCAST_NOTGMEMBER 1 /* This host not a member of group */
|
|
#define MCAST_NOTSMEMBER 2 /* This host excluded source */
|
|
#define MCAST_MUTED 3 /* [deprecated] */
|
|
|
|
/*
|
|
* Per-interface IPv4 structures.
|
|
*/
|
|
struct in_ifextra {
|
|
uint32_t netsig_len;
|
|
u_int8_t netsig[IFNET_SIGNATURELEN];
|
|
};
|
|
#define IN_IFEXTRA(_ifp) (_ifp->if_inetdata)
|
|
|
|
extern u_int32_t ipv4_ll_arp_aware;
|
|
|
|
extern int imo_multi_filter(const struct ip_moptions *,
|
|
const struct ifnet *, const struct sockaddr_in *,
|
|
const struct sockaddr_in *);
|
|
extern int imo_clone(struct inpcb *, struct inpcb *);
|
|
extern void inm_commit(struct in_multi *);
|
|
extern void inm_clear_recorded(struct in_multi *);
|
|
extern void inm_print(const struct in_multi *);
|
|
extern int inm_record_source(struct in_multi *inm, const in_addr_t);
|
|
extern void inm_release(struct in_multi *);
|
|
extern struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
|
|
extern void in_delmulti(struct in_multi *);
|
|
extern int in_leavegroup(struct in_multi *, struct in_mfilter *);
|
|
extern int in_multi_detach(struct in_multi *);
|
|
extern void inm_addref(struct in_multi *, int);
|
|
extern void inm_remref(struct in_multi *, int);
|
|
extern void inm_purge(struct in_multi *);
|
|
extern uint8_t ims_get_mode(const struct in_multi *,
|
|
const struct ip_msource *, uint8_t);
|
|
extern int in_control(struct socket *, u_long, caddr_t, struct ifnet *,
|
|
struct proc *);
|
|
extern int in_inithead(void **, int);
|
|
extern void in_rtqdrain(void);
|
|
extern struct radix_node *in_validate(struct radix_node *);
|
|
extern void ip_input(struct mbuf *);
|
|
extern void ip_input_process_list(struct mbuf *);
|
|
extern int in_ifadown(struct ifaddr *ifa, int);
|
|
extern void in_ifscrub(struct ifnet *, struct in_ifaddr *, int);
|
|
extern uint32_t inaddr_hashval(uint32_t);
|
|
extern struct in_ifaddrhashhead *inaddr_hashlookup(uint32_t);
|
|
extern void in_purgeaddrs(struct ifnet *);
|
|
extern void gre_input(struct mbuf *, int);
|
|
extern void imf_leave(struct in_mfilter *);
|
|
extern void imf_purge(struct in_mfilter *);
|
|
extern int inp_join_group(struct inpcb *, struct sockopt *);
|
|
extern int inp_leave_group(struct inpcb *, struct sockopt *);
|
|
extern void in_multihead_lock_exclusive(void);
|
|
extern void in_multihead_lock_shared(void);
|
|
extern void in_multihead_lock_assert(int);
|
|
extern void in_multihead_lock_done(void);
|
|
#endif /* BSD_KERNEL_PRIVATE */
|
|
/* INET6 stuff */
|
|
#include <netinet6/in6_var.h>
|
|
#endif /* _NETINET_IN_VAR_H_ */
|