version 1.3.4.2, 1993/11/14 17:54:46 |
version 1.334, 2016/07/06 05:27:52 |
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/* $NetBSD$ */ |
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/* |
/* |
* Copyright (c) 1982, 1986, 1988 Regents of the University of California. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the project nor the names of its contributors |
* must display the following acknowledgement: |
* may be used to endorse or promote products derived from this software |
* This product includes software developed by the University of |
* without specific prior written permission. |
* California, Berkeley and its contributors. |
* |
* 4. Neither the name of the University nor the names of its contributors |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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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/*- |
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* Copyright (c) 1998 The NetBSD Foundation, Inc. |
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* All rights reserved. |
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* |
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* This code is derived from software contributed to The NetBSD Foundation |
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* by Public Access Networks Corporation ("Panix"). It was developed under |
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* contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* Copyright (c) 1982, 1986, 1988, 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 |
|
* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* SUCH DAMAGE. |
* |
* |
* from: @(#)ip_input.c 7.19 (Berkeley) 5/25/91 |
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
* $Id$ |
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*/ |
*/ |
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#include "param.h" |
#include <sys/cdefs.h> |
#include "systm.h" |
__KERNEL_RCSID(0, "$NetBSD$"); |
#include "malloc.h" |
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#include "mbuf.h" |
#ifdef _KERNEL_OPT |
#include "domain.h" |
#include "opt_inet.h" |
#include "protosw.h" |
#include "opt_compat_netbsd.h" |
#include "socket.h" |
#include "opt_gateway.h" |
#include "errno.h" |
#include "opt_ipsec.h" |
#include "time.h" |
#include "opt_mrouting.h" |
#include "kernel.h" |
#include "opt_mbuftrace.h" |
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#include "opt_inet_csum.h" |
#include "machine/cpu.h" |
#endif |
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#include "../net/if.h" |
#include "arp.h" |
#include "../net/route.h" |
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#include <sys/param.h> |
#include "in.h" |
#include <sys/systm.h> |
#include "in_systm.h" |
#include <sys/cpu.h> |
#include "ip.h" |
#include <sys/mbuf.h> |
#include "in_pcb.h" |
#include <sys/domain.h> |
#include "in_var.h" |
#include <sys/protosw.h> |
#include "ip_var.h" |
#include <sys/socket.h> |
#include "ip_icmp.h" |
#include <sys/socketvar.h> |
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#include <sys/errno.h> |
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#include <sys/time.h> |
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#include <sys/kernel.h> |
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#include <sys/pool.h> |
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#include <sys/sysctl.h> |
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#include <sys/kauth.h> |
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#include <net/if.h> |
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#include <net/if_dl.h> |
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#include <net/route.h> |
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#include <net/pktqueue.h> |
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#include <net/pfil.h> |
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#include <netinet/in.h> |
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#include <netinet/in_systm.h> |
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#include <netinet/ip.h> |
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#include <netinet/in_pcb.h> |
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#include <netinet/in_proto.h> |
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#include <netinet/in_var.h> |
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#include <netinet/ip_var.h> |
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#include <netinet/ip_private.h> |
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#include <netinet/ip_icmp.h> |
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/* just for gif_ttl */ |
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#include <netinet/in_gif.h> |
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#include "gif.h" |
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#include <net/if_gre.h> |
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#include "gre.h" |
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#ifdef MROUTING |
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#include <netinet/ip_mroute.h> |
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#endif |
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#include <netinet/portalgo.h> |
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#ifdef IPSEC |
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#include <netipsec/ipsec.h> |
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#endif |
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#ifndef IPFORWARDING |
#ifndef IPFORWARDING |
#ifdef GATEWAY |
#ifdef GATEWAY |
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#ifndef IPSENDREDIRECTS |
#ifndef IPSENDREDIRECTS |
#define IPSENDREDIRECTS 1 |
#define IPSENDREDIRECTS 1 |
#endif |
#endif |
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#ifndef IPFORWSRCRT |
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#define IPFORWSRCRT 1 /* forward source-routed packets */ |
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#endif |
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#ifndef IPALLOWSRCRT |
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#define IPALLOWSRCRT 1 /* allow source-routed packets */ |
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#endif |
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#ifndef IPMTUDISC |
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#define IPMTUDISC 1 |
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#endif |
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#ifndef IPMTUDISCTIMEOUT |
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#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */ |
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#endif |
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#ifdef COMPAT_50 |
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#include <compat/sys/time.h> |
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#include <compat/sys/socket.h> |
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#endif |
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/* |
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* Note: DIRECTED_BROADCAST is handled this way so that previous |
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* configuration using this option will Just Work. |
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*/ |
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#ifndef IPDIRECTEDBCAST |
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#ifdef DIRECTED_BROADCAST |
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#define IPDIRECTEDBCAST 1 |
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#else |
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#define IPDIRECTEDBCAST 0 |
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#endif /* DIRECTED_BROADCAST */ |
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#endif /* IPDIRECTEDBCAST */ |
int ipforwarding = IPFORWARDING; |
int ipforwarding = IPFORWARDING; |
int ipsendredirects = IPSENDREDIRECTS; |
int ipsendredirects = IPSENDREDIRECTS; |
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int ip_defttl = IPDEFTTL; |
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int ip_forwsrcrt = IPFORWSRCRT; |
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int ip_directedbcast = IPDIRECTEDBCAST; |
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int ip_allowsrcrt = IPALLOWSRCRT; |
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int ip_mtudisc = IPMTUDISC; |
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int ip_mtudisc_timeout = IPMTUDISCTIMEOUT; |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
int ipprintfs = 0; |
int ipprintfs = 0; |
#endif |
#endif |
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extern struct domain inetdomain; |
int ip_do_randomid = 0; |
extern struct protosw inetsw[]; |
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u_char ip_protox[IPPROTO_MAX]; |
/* |
int ipqmaxlen = IFQ_MAXLEN; |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
struct in_ifaddr *in_ifaddr; /* first inet address */ |
* the Strong ES model described in RFC 1122, but since the routing table |
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* and transmit implementation do not implement the Strong ES model, |
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* setting this to 1 results in an odd hybrid. |
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* |
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* XXX - ip_checkinterface currently must be disabled if you use ipnat |
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* to translate the destination address to another local interface. |
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* |
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* XXX - ip_checkinterface must be disabled if you add IP aliases |
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* to the loopback interface instead of the interface where the |
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* packets for those addresses are received. |
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*/ |
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static int ip_checkinterface __read_mostly = 0; |
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struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
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pktqueue_t * ip_pktq __read_mostly; |
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pfil_head_t * inet_pfil_hook __read_mostly; |
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ipid_state_t * ip_ids __read_mostly; |
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percpu_t * ipstat_percpu __read_mostly; |
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static struct route ipforward_rt __cacheline_aligned; |
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uint16_t ip_id; |
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#ifdef INET_CSUM_COUNTERS |
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#include <sys/device.h> |
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struct evcnt ip_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "inet", "hwcsum bad"); |
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struct evcnt ip_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "inet", "hwcsum ok"); |
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struct evcnt ip_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "inet", "swcsum"); |
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#define INET_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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EVCNT_ATTACH_STATIC(ip_hwcsum_bad); |
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EVCNT_ATTACH_STATIC(ip_hwcsum_ok); |
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EVCNT_ATTACH_STATIC(ip_swcsum); |
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#else |
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#define INET_CSUM_COUNTER_INCR(ev) /* nothing */ |
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#endif /* INET_CSUM_COUNTERS */ |
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/* |
/* |
* We need to save the IP options in case a protocol wants to respond |
* We need to save the IP options in case a protocol wants to respond |
Line 87 struct in_ifaddr *in_ifaddr; /* first |
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Line 258 struct in_ifaddr *in_ifaddr; /* first |
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* maintenance when the remote end is on a network that is not known |
* maintenance when the remote end is on a network that is not known |
* to us. |
* to us. |
*/ |
*/ |
int ip_nhops = 0; |
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static int ip_nhops = 0; |
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static struct ip_srcrt { |
static struct ip_srcrt { |
struct in_addr dst; /* final destination */ |
struct in_addr dst; /* final destination */ |
char nop; /* one NOP to align */ |
char nop; /* one NOP to align */ |
Line 95 static struct ip_srcrt { |
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Line 268 static struct ip_srcrt { |
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struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
} ip_srcrt; |
} ip_srcrt; |
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#ifdef GATEWAY |
static int ip_drainwanted; |
extern int if_index; |
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u_long *ip_ifmatrix; |
struct sockaddr_in ipaddr = { |
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.sin_len = sizeof(ipaddr), |
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.sin_family = AF_INET, |
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}; |
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static void save_rte(u_char *, struct in_addr); |
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#ifdef MBUFTRACE |
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struct mowner ip_rx_mowner = MOWNER_INIT("internet", "rx"); |
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struct mowner ip_tx_mowner = MOWNER_INIT("internet", "tx"); |
#endif |
#endif |
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static void ipintr(void *); |
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static void ip_input(struct mbuf *); |
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static void ip_forward(struct mbuf *, int, struct ifnet *); |
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static bool ip_dooptions(struct mbuf *); |
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static struct in_ifaddr *ip_rtaddr(struct in_addr); |
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static void sysctl_net_inet_ip_setup(struct sysctllog **); |
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static struct in_ifaddr *ip_match_our_address(struct ifnet *, struct ip *, |
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int *); |
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static struct in_ifaddr *ip_match_our_address_broadcast(struct ifnet *, |
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struct ip *); |
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/* XXX: Not yet enabled. */ |
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#define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock)) |
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#define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock)) |
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/* |
/* |
* IP initialization: fill in IP protocol switch table. |
* IP initialization: fill in IP protocol switch table. |
* All protocols not implemented in kernel go to raw IP protocol handler. |
* All protocols not implemented in kernel go to raw IP protocol handler. |
*/ |
*/ |
ip_init() |
void |
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ip_init(void) |
{ |
{ |
register struct protosw *pr; |
const struct protosw *pr; |
register int i; |
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in_init(); |
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sysctl_net_inet_ip_setup(NULL); |
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pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
if (pr == 0) |
KASSERT(pr != NULL); |
panic("ip_init"); |
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for (i = 0; i < IPPROTO_MAX; i++) |
ip_pktq = pktq_create(IFQ_MAXLEN, ipintr, NULL); |
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KASSERT(ip_pktq != NULL); |
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for (u_int i = 0; i < IPPROTO_MAX; i++) { |
ip_protox[i] = pr - inetsw; |
ip_protox[i] = pr - inetsw; |
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} |
for (pr = inetdomain.dom_protosw; |
for (pr = inetdomain.dom_protosw; |
pr < inetdomain.dom_protoswNPROTOSW; pr++) |
pr < inetdomain.dom_protoswNPROTOSW; pr++) |
if (pr->pr_domain->dom_family == PF_INET && |
if (pr->pr_domain->dom_family == PF_INET && |
pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) |
pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) |
ip_protox[pr->pr_protocol] = pr - inetsw; |
ip_protox[pr->pr_protocol] = pr - inetsw; |
ipq.next = ipq.prev = &ipq; |
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ip_id = time.tv_sec & 0xffff; |
ip_reass_init(); |
ipintrq.ifq_maxlen = ipqmaxlen; |
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ip_ids = ip_id_init(); |
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ip_id = time_uptime & 0xfffff; |
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ip_mtudisc_timeout_q = rt_timer_queue_create(ip_mtudisc_timeout); |
#ifdef GATEWAY |
#ifdef GATEWAY |
i = (if_index + 1) * (if_index + 1) * sizeof (u_long); |
ipflow_init(); |
if ((ip_ifmatrix = (u_long *) malloc(i, M_RTABLE, M_WAITOK)) == 0) |
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panic("no memory for ip_ifmatrix"); |
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#endif |
#endif |
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/* Register our Packet Filter hook. */ |
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inet_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET); |
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KASSERT(inet_pfil_hook != NULL); |
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#ifdef MBUFTRACE |
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MOWNER_ATTACH(&ip_tx_mowner); |
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MOWNER_ATTACH(&ip_rx_mowner); |
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#endif /* MBUFTRACE */ |
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ipstat_percpu = percpu_alloc(sizeof(uint64_t) * IP_NSTATS); |
} |
} |
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struct ip *ip_reass(); |
static struct in_ifaddr * |
struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
ip_match_our_address(struct ifnet *ifp, struct ip *ip, int *downmatch) |
struct route ipforward_rt; |
{ |
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struct in_ifaddr *ia = NULL; |
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int checkif; |
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/* |
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* Enable a consistency check between the destination address |
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* and the arrival interface for a unicast packet (the RFC 1122 |
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* strong ES model) if IP forwarding is disabled and the packet |
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* is not locally generated. |
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* |
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* XXX - Checking also should be disabled if the destination |
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* address is ipnat'ed to a different interface. |
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* |
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* XXX - Checking is incompatible with IP aliases added |
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* to the loopback interface instead of the interface where |
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* the packets are received. |
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* |
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* XXX - We need to add a per ifaddr flag for this so that |
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* we get finer grain control. |
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*/ |
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checkif = ip_checkinterface && (ipforwarding == 0) && |
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(ifp->if_flags & IFF_LOOPBACK) == 0; |
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IN_ADDRHASH_READER_FOREACH(ia, ip->ip_dst.s_addr) { |
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if (in_hosteq(ia->ia_addr.sin_addr, ip->ip_dst)) { |
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if (ia->ia4_flags & IN_IFF_NOTREADY) |
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continue; |
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if (checkif && ia->ia_ifp != ifp) |
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continue; |
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if ((ia->ia_ifp->if_flags & IFF_UP) != 0) |
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break; |
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else |
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downmatch++; |
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} |
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} |
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return ia; |
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} |
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static struct in_ifaddr * |
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ip_match_our_address_broadcast(struct ifnet *ifp, struct ip *ip) |
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{ |
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struct in_ifaddr *ia = NULL; |
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struct ifaddr *ifa; |
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IFADDR_FOREACH(ifa, ifp) { |
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if (ifa->ifa_addr->sa_family != AF_INET) |
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continue; |
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ia = ifatoia(ifa); |
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if (ia->ia4_flags & IN_IFF_NOTREADY) |
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continue; |
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if (in_hosteq(ip->ip_dst, ia->ia_broadaddr.sin_addr) || |
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in_hosteq(ip->ip_dst, ia->ia_netbroadcast) || |
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/* |
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* Look for all-0's host part (old broadcast addr), |
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* either for subnet or net. |
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*/ |
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ip->ip_dst.s_addr == ia->ia_subnet || |
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ip->ip_dst.s_addr == ia->ia_net) |
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goto matched; |
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/* |
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* An interface with IP address zero accepts |
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* all packets that arrive on that interface. |
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*/ |
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if (in_nullhost(ia->ia_addr.sin_addr)) |
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goto matched; |
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} |
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ia = NULL; |
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matched: |
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return ia; |
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} |
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/* |
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* IP software interrupt routine. |
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*/ |
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static void |
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ipintr(void *arg __unused) |
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{ |
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struct mbuf *m; |
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KASSERT(cpu_softintr_p()); |
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mutex_enter(softnet_lock); |
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while ((m = pktq_dequeue(ip_pktq)) != NULL) { |
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ip_input(m); |
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} |
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mutex_exit(softnet_lock); |
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} |
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/* |
/* |
* Ip input routine. Checksum and byte swap header. If fragmented |
* IP input routine. Checksum and byte swap header. If fragmented |
* try to reassemble. Process options. Pass to next level. |
* try to reassemble. Process options. Pass to next level. |
*/ |
*/ |
ipintr() |
static void |
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ip_input(struct mbuf *m) |
{ |
{ |
register struct ip *ip; |
struct ip *ip = NULL; |
register struct mbuf *m; |
struct in_ifaddr *ia; |
register struct ipq *fp; |
int hlen = 0, len; |
register struct in_ifaddr *ia; |
int downmatch; |
int hlen, s; |
int srcrt = 0; |
#ifdef DIAGNOSTIC |
ifnet_t *ifp; |
static int busy = 0; |
struct psref psref; |
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KASSERTMSG(cpu_softintr_p(), "ip_input: not in the software " |
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"interrupt handler; synchronization assumptions violated"); |
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MCLAIM(m, &ip_rx_mowner); |
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KASSERT((m->m_flags & M_PKTHDR) != 0); |
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ifp = m_get_rcvif_psref(m, &psref); |
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if (__predict_false(ifp == NULL)) |
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goto out; |
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if (busy) |
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panic("ipintr: called recursively\n"); |
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++busy; |
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#endif |
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next: |
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/* |
/* |
* Get next datagram off input queue and get IP header |
* If no IP addresses have been set yet but the interfaces |
* in first mbuf. |
* are receiving, can't do anything with incoming packets yet. |
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* Note: we pre-check without locks held. |
*/ |
*/ |
s = splimp(); |
if (!TAILQ_FIRST(&in_ifaddrhead)) { |
IF_DEQUEUE(&ipintrq, m); |
goto out; |
splx(s); |
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if (m == 0) { |
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#ifdef DIAGNOSTIC |
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--busy; |
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#endif |
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return; |
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} |
} |
#ifdef DIAGNOSTIC |
IP_STATINC(IP_STAT_TOTAL); |
if ((m->m_flags & M_PKTHDR) == 0) |
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panic("ipintr no HDR"); |
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#endif |
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/* |
/* |
* If no IP addresses have been set yet but the interfaces |
* If the IP header is not aligned, slurp it up into a new |
* are receiving, can't do anything with incoming packets yet. |
* mbuf with space for link headers, in the event we forward |
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* it. Otherwise, if it is aligned, make sure the entire |
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* base IP header is in the first mbuf of the chain. |
*/ |
*/ |
if (in_ifaddr == NULL) |
if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) { |
goto bad; |
if ((m = m_copyup(m, sizeof(struct ip), |
ipstat.ips_total++; |
(max_linkhdr + 3) & ~3)) == NULL) { |
if (m->m_len < sizeof (struct ip) && |
/* XXXJRT new stat, please */ |
(m = m_pullup(m, sizeof (struct ip))) == 0) { |
IP_STATINC(IP_STAT_TOOSMALL); |
ipstat.ips_toosmall++; |
goto out; |
goto next; |
} |
|
} else if (__predict_false(m->m_len < sizeof (struct ip))) { |
|
if ((m = m_pullup(m, sizeof (struct ip))) == NULL) { |
|
IP_STATINC(IP_STAT_TOOSMALL); |
|
goto out; |
|
} |
} |
} |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
|
if (ip->ip_v != IPVERSION) { |
|
IP_STATINC(IP_STAT_BADVERS); |
|
goto out; |
|
} |
hlen = ip->ip_hl << 2; |
hlen = ip->ip_hl << 2; |
if (hlen < sizeof(struct ip)) { /* minimum header length */ |
if (hlen < sizeof(struct ip)) { /* minimum header length */ |
ipstat.ips_badhlen++; |
IP_STATINC(IP_STAT_BADHLEN); |
goto bad; |
goto out; |
} |
} |
if (hlen > m->m_len) { |
if (hlen > m->m_len) { |
if ((m = m_pullup(m, hlen)) == 0) { |
if ((m = m_pullup(m, hlen)) == NULL) { |
ipstat.ips_badhlen++; |
IP_STATINC(IP_STAT_BADHLEN); |
goto next; |
goto out; |
} |
} |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
} |
} |
if (ip->ip_sum = in_cksum(m, hlen)) { |
|
ipstat.ips_badsum++; |
/* |
goto bad; |
* RFC1122: packets with a multicast source address are |
|
* not allowed. |
|
*/ |
|
if (IN_MULTICAST(ip->ip_src.s_addr)) { |
|
IP_STATINC(IP_STAT_BADADDR); |
|
goto out; |
} |
} |
|
|
|
/* 127/8 must not appear on wire - RFC1122 */ |
|
if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET || |
|
(ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) { |
|
if ((ifp->if_flags & IFF_LOOPBACK) == 0) { |
|
IP_STATINC(IP_STAT_BADADDR); |
|
goto out; |
|
} |
|
} |
|
|
|
switch (m->m_pkthdr.csum_flags & |
|
((ifp->if_csum_flags_rx & M_CSUM_IPv4) | |
|
M_CSUM_IPv4_BAD)) { |
|
case M_CSUM_IPv4|M_CSUM_IPv4_BAD: |
|
INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); |
|
IP_STATINC(IP_STAT_BADSUM); |
|
goto out; |
|
|
|
case M_CSUM_IPv4: |
|
/* Checksum was okay. */ |
|
INET_CSUM_COUNTER_INCR(&ip_hwcsum_ok); |
|
break; |
|
|
|
default: |
|
/* |
|
* Must compute it ourselves. Maybe skip checksum on |
|
* loopback interfaces. |
|
*/ |
|
if (__predict_true(!(ifp->if_flags & IFF_LOOPBACK) || |
|
ip_do_loopback_cksum)) { |
|
INET_CSUM_COUNTER_INCR(&ip_swcsum); |
|
if (in_cksum(m, hlen) != 0) { |
|
IP_STATINC(IP_STAT_BADSUM); |
|
goto out; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
/* Retrieve the packet length. */ |
|
len = ntohs(ip->ip_len); |
|
|
/* |
/* |
* Convert fields to host representation. |
* Check for additional length bogosity |
*/ |
*/ |
NTOHS(ip->ip_len); |
if (len < hlen) { |
if (ip->ip_len < hlen) { |
IP_STATINC(IP_STAT_BADLEN); |
ipstat.ips_badlen++; |
goto out; |
goto bad; |
|
} |
} |
NTOHS(ip->ip_id); |
|
NTOHS(ip->ip_off); |
|
|
|
/* |
/* |
* Check that the amount of data in the buffers |
* Check that the amount of data in the buffers |
|
|
* Trim mbufs if longer than we expect. |
* Trim mbufs if longer than we expect. |
* Drop packet if shorter than we expect. |
* Drop packet if shorter than we expect. |
*/ |
*/ |
if (m->m_pkthdr.len < ip->ip_len) { |
if (m->m_pkthdr.len < len) { |
ipstat.ips_tooshort++; |
IP_STATINC(IP_STAT_TOOSHORT); |
goto bad; |
goto out; |
} |
} |
if (m->m_pkthdr.len > ip->ip_len) { |
if (m->m_pkthdr.len > len) { |
if (m->m_len == m->m_pkthdr.len) { |
if (m->m_len == m->m_pkthdr.len) { |
m->m_len = ip->ip_len; |
m->m_len = len; |
m->m_pkthdr.len = ip->ip_len; |
m->m_pkthdr.len = len; |
} else |
} else |
m_adj(m, ip->ip_len - m->m_pkthdr.len); |
m_adj(m, len - m->m_pkthdr.len); |
} |
} |
|
|
/* |
/* |
|
* Assume that we can create a fast-forward IP flow entry |
|
* based on this packet. |
|
*/ |
|
m->m_flags |= M_CANFASTFWD; |
|
|
|
/* |
|
* Run through list of hooks for input packets. If there are any |
|
* filters which require that additional packets in the flow are |
|
* not fast-forwarded, they must clear the M_CANFASTFWD flag. |
|
* Note that filters must _never_ set this flag, as another filter |
|
* in the list may have previously cleared it. |
|
*/ |
|
#if defined(IPSEC) |
|
if (!ipsec_used || !ipsec_indone(m)) |
|
#else |
|
if (1) |
|
#endif |
|
{ |
|
struct in_addr odst = ip->ip_dst; |
|
bool freed; |
|
|
|
SOFTNET_LOCK(); |
|
freed = pfil_run_hooks(inet_pfil_hook, &m, ifp, PFIL_IN) != 0; |
|
SOFTNET_UNLOCK(); |
|
if (freed || m == NULL) { |
|
goto out; |
|
} |
|
ip = mtod(m, struct ip *); |
|
hlen = ip->ip_hl << 2; |
|
|
|
/* |
|
* XXX The setting of "srcrt" here is to prevent ip_forward() |
|
* from generating ICMP redirects for packets that have |
|
* been redirected by a hook back out on to the same LAN that |
|
* they came from and is not an indication that the packet |
|
* is being inffluenced by source routing options. This |
|
* allows things like |
|
* "rdr tlp0 0/0 port 80 -> 1.1.1.200 3128 tcp" |
|
* where tlp0 is both on the 1.1.1.0/24 network and is the |
|
* default route for hosts on 1.1.1.0/24. Of course this |
|
* also requires a "map tlp0 ..." to complete the story. |
|
* One might argue whether or not this kind of network config. |
|
* should be supported in this manner... |
|
*/ |
|
srcrt = (odst.s_addr != ip->ip_dst.s_addr); |
|
} |
|
|
|
#ifdef ALTQ |
|
/* XXX Temporary until ALTQ is changed to use a pfil hook */ |
|
if (altq_input) { |
|
SOFTNET_LOCK(); |
|
if ((*altq_input)(m, AF_INET) == 0) { |
|
/* Packet dropped by traffic conditioner. */ |
|
SOFTNET_UNLOCK(); |
|
goto out; |
|
} |
|
SOFTNET_UNLOCK(); |
|
} |
|
#endif |
|
|
|
/* |
* Process options and, if not destined for us, |
* Process options and, if not destined for us, |
* ship it on. ip_dooptions returns 1 when an |
* ship it on. ip_dooptions returns 1 when an |
* error was detected (causing an icmp message |
* error was detected (causing an icmp message |
|
|
*/ |
*/ |
ip_nhops = 0; /* for source routed packets */ |
ip_nhops = 0; /* for source routed packets */ |
if (hlen > sizeof (struct ip) && ip_dooptions(m)) |
if (hlen > sizeof (struct ip) && ip_dooptions(m)) |
goto next; |
goto out; |
|
|
/* |
/* |
* Check our list of addresses, to see if the packet is for us. |
* Check our list of addresses, to see if the packet is for us. |
*/ |
* |
for (ia = in_ifaddr; ia; ia = ia->ia_next) { |
* Traditional 4.4BSD did not consult IFF_UP at all. |
#define satosin(sa) ((struct sockaddr_in *)(sa)) |
* The behavior here is to treat addresses on !IFF_UP interface |
|
* or IN_IFF_NOTREADY addresses as not mine. |
|
*/ |
|
downmatch = 0; |
|
ia = ip_match_our_address(ifp, ip, &downmatch); |
|
if (ia != NULL) |
|
goto ours; |
|
|
if (IA_SIN(ia)->sin_addr.s_addr == ip->ip_dst.s_addr) |
if (ifp->if_flags & IFF_BROADCAST) { |
|
ia = ip_match_our_address_broadcast(ifp, ip); |
|
if (ia != NULL) |
goto ours; |
goto ours; |
if ( |
} |
#ifdef DIRECTED_BROADCAST |
|
ia->ia_ifp == m->m_pkthdr.rcvif && |
|
#endif |
|
(ia->ia_ifp->if_flags & IFF_BROADCAST)) { |
|
u_long t; |
|
|
|
if (satosin(&ia->ia_broadaddr)->sin_addr.s_addr == |
if (IN_MULTICAST(ip->ip_dst.s_addr)) { |
ip->ip_dst.s_addr) |
#ifdef MROUTING |
goto ours; |
extern struct socket *ip_mrouter; |
if (ip->ip_dst.s_addr == ia->ia_netbroadcast.s_addr) |
|
goto ours; |
if (ip_mrouter) { |
/* |
/* |
* Look for all-0's host part (old broadcast addr), |
* If we are acting as a multicast router, all |
* either for subnet or net. |
* incoming multicast packets are passed to the |
|
* kernel-level multicast forwarding function. |
|
* The packet is returned (relatively) intact; if |
|
* ip_mforward() returns a non-zero value, the packet |
|
* must be discarded, else it may be accepted below. |
|
* |
|
* (The IP ident field is put in the same byte order |
|
* as expected when ip_mforward() is called from |
|
* ip_output().) |
*/ |
*/ |
t = ntohl(ip->ip_dst.s_addr); |
SOFTNET_LOCK(); |
if (t == ia->ia_subnet) |
if (ip_mforward(m, ifp) != 0) { |
goto ours; |
SOFTNET_UNLOCK(); |
if (t == ia->ia_net) |
IP_STATINC(IP_STAT_CANTFORWARD); |
|
goto out; |
|
} |
|
SOFTNET_UNLOCK(); |
|
|
|
/* |
|
* The process-level routing demon needs to receive |
|
* all multicast IGMP packets, whether or not this |
|
* host belongs to their destination groups. |
|
*/ |
|
if (ip->ip_p == IPPROTO_IGMP) { |
goto ours; |
goto ours; |
|
} |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
|
} |
|
#endif |
|
/* |
|
* See if we belong to the destination multicast group on the |
|
* arrival interface. |
|
*/ |
|
if (!in_multi_group(ip->ip_dst, ifp, 0)) { |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
|
goto out; |
} |
} |
} |
|
if (ip->ip_dst.s_addr == (u_long)INADDR_BROADCAST) |
|
goto ours; |
goto ours; |
if (ip->ip_dst.s_addr == INADDR_ANY) |
} |
|
if (ip->ip_dst.s_addr == INADDR_BROADCAST || |
|
in_nullhost(ip->ip_dst)) |
goto ours; |
goto ours; |
|
|
/* |
/* |
* Not for us; forward if possible and desirable. |
* Not for us; forward if possible and desirable. |
*/ |
*/ |
if (ipforwarding == 0) { |
if (ipforwarding == 0) { |
ipstat.ips_cantforward++; |
m_put_rcvif_psref(ifp, &psref); |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
m_freem(m); |
m_freem(m); |
} else |
} else { |
ip_forward(m, 0); |
/* |
goto next; |
* If ip_dst matched any of my address on !IFF_UP interface, |
|
* and there's no IFF_UP interface that matches ip_dst, |
|
* send icmp unreach. Forwarding it will result in in-kernel |
|
* forwarding loop till TTL goes to 0. |
|
*/ |
|
if (downmatch) { |
|
m_put_rcvif_psref(ifp, &psref); |
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, 0); |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
|
return; |
|
} |
|
#ifdef IPSEC |
|
/* Perform IPsec, if any. */ |
|
if (ipsec_used) { |
|
SOFTNET_LOCK(); |
|
if (ipsec4_input(m, IP_FORWARDING | |
|
(ip_directedbcast ? IP_ALLOWBROADCAST : 0)) != 0) { |
|
SOFTNET_UNLOCK(); |
|
goto out; |
|
} |
|
SOFTNET_UNLOCK(); |
|
} |
|
#endif |
|
ip_forward(m, srcrt, ifp); |
|
m_put_rcvif_psref(ifp, &psref); |
|
} |
|
return; |
|
|
ours: |
ours: |
|
m_put_rcvif_psref(ifp, &psref); |
|
ifp = NULL; |
|
|
/* |
/* |
* If offset or IP_MF are set, must reassemble. |
* If offset or IP_MF are set, must reassemble. |
* Otherwise, nothing need be done. |
*/ |
* (We could look in the reassembly queue to see |
if (ip->ip_off & ~htons(IP_DF|IP_RF)) { |
* if the packet was previously fragmented, |
|
* but it's not worth the time; just let them time out.) |
|
*/ |
|
if (ip->ip_off &~ IP_DF) { |
|
if (m->m_flags & M_EXT) { /* XXX */ |
|
if ((m = m_pullup(m, sizeof (struct ip))) == 0) { |
|
ipstat.ips_toosmall++; |
|
goto next; |
|
} |
|
ip = mtod(m, struct ip *); |
|
} |
|
/* |
|
* Look for queue of fragments |
|
* of this datagram. |
|
*/ |
|
for (fp = ipq.next; fp != &ipq; fp = fp->next) |
|
if (ip->ip_id == fp->ipq_id && |
|
ip->ip_src.s_addr == fp->ipq_src.s_addr && |
|
ip->ip_dst.s_addr == fp->ipq_dst.s_addr && |
|
ip->ip_p == fp->ipq_p) |
|
goto found; |
|
fp = 0; |
|
found: |
|
|
|
/* |
/* |
* Adjust ip_len to not reflect header, |
* Pass to IP reassembly mechanism. |
* set ip_mff if more fragments are expected, |
|
* convert offset of this to bytes. |
|
*/ |
*/ |
ip->ip_len -= hlen; |
if (ip_reass_packet(&m, ip) != 0) { |
((struct ipasfrag *)ip)->ipf_mff = 0; |
/* Failed; invalid fragment(s) or packet. */ |
if (ip->ip_off & IP_MF) |
goto out; |
((struct ipasfrag *)ip)->ipf_mff = 1; |
} |
ip->ip_off <<= 3; |
if (m == NULL) { |
|
/* More fragments should come; silently return. */ |
|
goto out; |
|
} |
/* |
/* |
* If datagram marked as having more fragments |
* Reassembly is done, we have the final packet. |
* or if this is not the first fragment, |
* Updated cached data in local variable(s). |
* attempt reassembly; if it succeeds, proceed. |
|
*/ |
*/ |
if (((struct ipasfrag *)ip)->ipf_mff || ip->ip_off) { |
ip = mtod(m, struct ip *); |
ipstat.ips_fragments++; |
hlen = ip->ip_hl << 2; |
ip = ip_reass((struct ipasfrag *)ip, fp); |
|
if (ip == 0) |
|
goto next; |
|
else |
|
ipstat.ips_reassembled++; |
|
m = dtom(ip); |
|
} else |
|
if (fp) |
|
ip_freef(fp); |
|
} else |
|
ip->ip_len -= hlen; |
|
|
|
/* |
|
* Switch out to protocol's input routine. |
|
*/ |
|
ipstat.ips_delivered++; |
|
(*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen); |
|
goto next; |
|
bad: |
|
m_freem(m); |
|
goto next; |
|
} |
|
|
|
/* |
|
* Take incoming datagram fragment and try to |
|
* reassemble it into whole datagram. If a chain for |
|
* reassembly of this datagram already exists, then it |
|
* is given as fp; otherwise have to make a chain. |
|
*/ |
|
struct ip * |
|
ip_reass(ip, fp) |
|
register struct ipasfrag *ip; |
|
register struct ipq *fp; |
|
{ |
|
register struct mbuf *m = dtom(ip); |
|
register struct ipasfrag *q; |
|
struct mbuf *t; |
|
int hlen = ip->ip_hl << 2; |
|
int i, next; |
|
|
|
/* |
|
* Presence of header sizes in mbufs |
|
* would confuse code below. |
|
*/ |
|
m->m_data += hlen; |
|
m->m_len -= hlen; |
|
|
|
/* |
|
* If first fragment to arrive, create a reassembly queue. |
|
*/ |
|
if (fp == 0) { |
|
if ((t = m_get(M_DONTWAIT, MT_FTABLE)) == NULL) |
|
goto dropfrag; |
|
fp = mtod(t, struct ipq *); |
|
insque(fp, &ipq); |
|
fp->ipq_ttl = IPFRAGTTL; |
|
fp->ipq_p = ip->ip_p; |
|
fp->ipq_id = ip->ip_id; |
|
fp->ipq_next = fp->ipq_prev = (struct ipasfrag *)fp; |
|
fp->ipq_src = ((struct ip *)ip)->ip_src; |
|
fp->ipq_dst = ((struct ip *)ip)->ip_dst; |
|
q = (struct ipasfrag *)fp; |
|
goto insert; |
|
} |
} |
|
|
|
#ifdef IPSEC |
/* |
/* |
* Find a segment which begins after this one does. |
* Enforce IPsec policy checking if we are seeing last header. |
|
* Note that we do not visit this with protocols with PCB layer |
|
* code - like UDP/TCP/raw IP. |
*/ |
*/ |
for (q = fp->ipq_next; q != (struct ipasfrag *)fp; q = q->ipf_next) |
if (ipsec_used && |
if (q->ip_off > ip->ip_off) |
(inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0) { |
break; |
SOFTNET_LOCK(); |
|
if (ipsec4_input(m, 0) != 0) { |
/* |
SOFTNET_UNLOCK(); |
* If there is a preceding segment, it may provide some of |
goto out; |
* our data already. If so, drop the data from the incoming |
|
* segment. If it provides all of our data, drop us. |
|
*/ |
|
if (q->ipf_prev != (struct ipasfrag *)fp) { |
|
i = q->ipf_prev->ip_off + q->ipf_prev->ip_len - ip->ip_off; |
|
if (i > 0) { |
|
if (i >= ip->ip_len) |
|
goto dropfrag; |
|
m_adj(dtom(ip), i); |
|
ip->ip_off += i; |
|
ip->ip_len -= i; |
|
} |
} |
|
SOFTNET_UNLOCK(); |
} |
} |
|
#endif |
|
|
/* |
/* |
* While we overlap succeeding segments trim them or, |
* Switch out to protocol's input routine. |
* if they are completely covered, dequeue them. |
|
*/ |
*/ |
while (q != (struct ipasfrag *)fp && ip->ip_off + ip->ip_len > q->ip_off) { |
#if IFA_STATS |
i = (ip->ip_off + ip->ip_len) - q->ip_off; |
if (ia && ip) |
if (i < q->ip_len) { |
ia->ia_ifa.ifa_data.ifad_inbytes += ntohs(ip->ip_len); |
q->ip_len -= i; |
#endif |
q->ip_off += i; |
IP_STATINC(IP_STAT_DELIVERED); |
m_adj(dtom(q), i); |
|
break; |
|
} |
|
q = q->ipf_next; |
|
m_freem(dtom(q->ipf_prev)); |
|
ip_deq(q->ipf_prev); |
|
} |
|
|
|
insert: |
|
/* |
|
* Stick new segment in its place; |
|
* check for complete reassembly. |
|
*/ |
|
ip_enq(ip, q->ipf_prev); |
|
next = 0; |
|
for (q = fp->ipq_next; q != (struct ipasfrag *)fp; q = q->ipf_next) { |
|
if (q->ip_off != next) |
|
return (0); |
|
next += q->ip_len; |
|
} |
|
if (q->ipf_prev->ipf_mff) |
|
return (0); |
|
|
|
/* |
|
* Reassembly is complete; concatenate fragments. |
|
*/ |
|
q = fp->ipq_next; |
|
m = dtom(q); |
|
t = m->m_next; |
|
m->m_next = 0; |
|
m_cat(m, t); |
|
q = q->ipf_next; |
|
while (q != (struct ipasfrag *)fp) { |
|
t = dtom(q); |
|
q = q->ipf_next; |
|
m_cat(m, t); |
|
} |
|
|
|
/* |
|
* Create header for new ip packet by |
|
* modifying header of first packet; |
|
* dequeue and discard fragment reassembly header. |
|
* Make header visible. |
|
*/ |
|
ip = fp->ipq_next; |
|
ip->ip_len = next; |
|
((struct ip *)ip)->ip_src = fp->ipq_src; |
|
((struct ip *)ip)->ip_dst = fp->ipq_dst; |
|
remque(fp); |
|
(void) m_free(dtom(fp)); |
|
m = dtom(ip); |
|
m->m_len += (ip->ip_hl << 2); |
|
m->m_data -= (ip->ip_hl << 2); |
|
/* some debugging cruft by sklower, below, will go away soon */ |
|
if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */ |
|
register int plen = 0; |
|
for (t = m; m; m = m->m_next) |
|
plen += m->m_len; |
|
t->m_pkthdr.len = plen; |
|
} |
|
return ((struct ip *)ip); |
|
|
|
dropfrag: |
|
ipstat.ips_fragdropped++; |
|
m_freem(m); |
|
return (0); |
|
} |
|
|
|
/* |
|
* Free a fragment reassembly header and all |
|
* associated datagrams. |
|
*/ |
|
ip_freef(fp) |
|
struct ipq *fp; |
|
{ |
|
register struct ipasfrag *q, *p; |
|
|
|
for (q = fp->ipq_next; q != (struct ipasfrag *)fp; q = p) { |
const int off = hlen, nh = ip->ip_p; |
p = q->ipf_next; |
|
ip_deq(q); |
|
m_freem(dtom(q)); |
|
} |
|
remque(fp); |
|
(void) m_free(dtom(fp)); |
|
} |
|
|
|
/* |
SOFTNET_LOCK(); |
* Put an ip fragment on a reassembly chain. |
(*inetsw[ip_protox[nh]].pr_input)(m, off, nh); |
* Like insque, but pointers in middle of structure. |
SOFTNET_UNLOCK(); |
*/ |
return; |
ip_enq(p, prev) |
|
register struct ipasfrag *p, *prev; |
out: |
{ |
m_put_rcvif_psref(ifp, &psref); |
|
if (m != NULL) |
p->ipf_prev = prev; |
m_freem(m); |
p->ipf_next = prev->ipf_next; |
|
prev->ipf_next->ipf_prev = p; |
|
prev->ipf_next = p; |
|
} |
} |
|
|
/* |
/* |
* To ip_enq as remque is to insque. |
* IP timer processing. |
*/ |
*/ |
ip_deq(p) |
void |
register struct ipasfrag *p; |
ip_slowtimo(void) |
{ |
{ |
|
|
p->ipf_prev->ipf_next = p->ipf_next; |
mutex_enter(softnet_lock); |
p->ipf_next->ipf_prev = p->ipf_prev; |
KERNEL_LOCK(1, NULL); |
} |
|
|
|
/* |
ip_reass_slowtimo(); |
* IP timer processing; |
|
* if a timer expires on a reassembly |
|
* queue, discard it. |
|
*/ |
|
ip_slowtimo() |
|
{ |
|
register struct ipq *fp; |
|
int s = splnet(); |
|
|
|
fp = ipq.next; |
KERNEL_UNLOCK_ONE(NULL); |
if (fp == 0) { |
mutex_exit(softnet_lock); |
splx(s); |
|
return; |
|
} |
|
while (fp != &ipq) { |
|
--fp->ipq_ttl; |
|
fp = fp->next; |
|
if (fp->prev->ipq_ttl == 0) { |
|
ipstat.ips_fragtimeout++; |
|
ip_freef(fp->prev); |
|
} |
|
} |
|
splx(s); |
|
} |
} |
|
|
/* |
/* |
* Drain off all datagram fragments. |
* IP drain processing. |
*/ |
*/ |
ip_drain() |
void |
|
ip_drain(void) |
{ |
{ |
|
|
while (ipq.next != &ipq) { |
KERNEL_LOCK(1, NULL); |
ipstat.ips_fragdropped++; |
ip_reass_drain(); |
ip_freef(ipq.next); |
KERNEL_UNLOCK_ONE(NULL); |
} |
|
} |
} |
|
|
extern struct in_ifaddr *ifptoia(); |
|
struct in_ifaddr *ip_rtaddr(); |
|
|
|
/* |
/* |
* Do option processing on a datagram, |
* ip_dooptions: perform option processing on a datagram, possibly discarding |
* possibly discarding it if bad options are encountered, |
* it if bad options are encountered, or forwarding it if source-routed. |
* or forwarding it if source-routed. |
* |
* Returns 1 if packet has been forwarded/freed, |
* => Returns true if packet has been forwarded/freed. |
* 0 if the packet should be processed further. |
* => Returns false if the packet should be processed further. |
*/ |
*/ |
ip_dooptions(m) |
static bool |
struct mbuf *m; |
ip_dooptions(struct mbuf *m) |
{ |
{ |
register struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
register u_char *cp; |
u_char *cp, *cp0; |
register struct ip_timestamp *ipt; |
struct ip_timestamp *ipt; |
register struct in_ifaddr *ia; |
struct in_ifaddr *ia; |
int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0; |
int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0; |
struct in_addr *sin; |
struct in_addr dst; |
n_time ntime; |
n_time ntime; |
|
|
|
dst = ip->ip_dst; |
cp = (u_char *)(ip + 1); |
cp = (u_char *)(ip + 1); |
cnt = (ip->ip_hl << 2) - sizeof (struct ip); |
cnt = (ip->ip_hl << 2) - sizeof (struct ip); |
for (; cnt > 0; cnt -= optlen, cp += optlen) { |
for (; cnt > 0; cnt -= optlen, cp += optlen) { |
|
|
if (opt == IPOPT_NOP) |
if (opt == IPOPT_NOP) |
optlen = 1; |
optlen = 1; |
else { |
else { |
|
if (cnt < IPOPT_OLEN + sizeof(*cp)) { |
|
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
|
goto bad; |
|
} |
optlen = cp[IPOPT_OLEN]; |
optlen = cp[IPOPT_OLEN]; |
if (optlen <= 0 || optlen > cnt) { |
if (optlen < IPOPT_OLEN + sizeof(*cp) || optlen > cnt) { |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
goto bad; |
goto bad; |
} |
} |
|
|
*/ |
*/ |
case IPOPT_LSRR: |
case IPOPT_LSRR: |
case IPOPT_SSRR: |
case IPOPT_SSRR: |
|
if (ip_allowsrcrt == 0) { |
|
type = ICMP_UNREACH; |
|
code = ICMP_UNREACH_NET_PROHIB; |
|
goto bad; |
|
} |
|
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
|
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
|
goto bad; |
|
} |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
goto bad; |
goto bad; |
} |
} |
ipaddr.sin_addr = ip->ip_dst; |
ipaddr.sin_addr = ip->ip_dst; |
ia = (struct in_ifaddr *) |
ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr))); |
ifa_ifwithaddr((struct sockaddr *)&ipaddr); |
|
if (ia == 0) { |
if (ia == 0) { |
if (opt == IPOPT_SSRR) { |
if (opt == IPOPT_SSRR) { |
type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
|
|
break; |
break; |
} |
} |
off--; /* 0 origin */ |
off--; /* 0 origin */ |
if (off > optlen - sizeof(struct in_addr)) { |
if ((off + sizeof(struct in_addr)) > optlen) { |
/* |
/* |
* End of source route. Should be for us. |
* End of source route. Should be for us. |
*/ |
*/ |
|
|
/* |
/* |
* locate outgoing interface |
* locate outgoing interface |
*/ |
*/ |
bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr, |
memcpy((void *)&ipaddr.sin_addr, (void *)(cp + off), |
sizeof(ipaddr.sin_addr)); |
sizeof(ipaddr.sin_addr)); |
if (opt == IPOPT_SSRR) { |
if (opt == IPOPT_SSRR) |
#define INA struct in_ifaddr * |
ia = ifatoia(ifa_ifwithladdr(sintosa(&ipaddr))); |
#define SA struct sockaddr * |
else |
if ((ia = (INA)ifa_ifwithdstaddr((SA)&ipaddr)) == 0) |
|
ia = in_iaonnetof(in_netof(ipaddr.sin_addr)); |
|
} else |
|
ia = ip_rtaddr(ipaddr.sin_addr); |
ia = ip_rtaddr(ipaddr.sin_addr); |
if (ia == 0) { |
if (ia == 0) { |
type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
|
|
goto bad; |
goto bad; |
} |
} |
ip->ip_dst = ipaddr.sin_addr; |
ip->ip_dst = ipaddr.sin_addr; |
bcopy((caddr_t)&(IA_SIN(ia)->sin_addr), |
bcopy((void *)&ia->ia_addr.sin_addr, |
(caddr_t)(cp + off), sizeof(struct in_addr)); |
(void *)(cp + off), sizeof(struct in_addr)); |
cp[IPOPT_OFFSET] += sizeof(struct in_addr); |
cp[IPOPT_OFFSET] += sizeof(struct in_addr); |
forward = 1; |
/* |
|
* Let ip_intr's mcast routing check handle mcast pkts |
|
*/ |
|
forward = !IN_MULTICAST(ip->ip_dst.s_addr); |
break; |
break; |
|
|
case IPOPT_RR: |
case IPOPT_RR: |
|
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
|
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
|
goto bad; |
|
} |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
goto bad; |
goto bad; |
|
|
* If no space remains, ignore. |
* If no space remains, ignore. |
*/ |
*/ |
off--; /* 0 origin */ |
off--; /* 0 origin */ |
if (off > optlen - sizeof(struct in_addr)) |
if ((off + sizeof(struct in_addr)) > optlen) |
break; |
break; |
bcopy((caddr_t)(&ip->ip_dst), (caddr_t)&ipaddr.sin_addr, |
memcpy((void *)&ipaddr.sin_addr, (void *)(&ip->ip_dst), |
sizeof(ipaddr.sin_addr)); |
sizeof(ipaddr.sin_addr)); |
/* |
/* |
* locate outgoing interface; if we're the destination, |
* locate outgoing interface; if we're the destination, |
* use the incoming interface (should be same). |
* use the incoming interface (should be same). |
*/ |
*/ |
if ((ia = (INA)ifa_ifwithaddr((SA)&ipaddr)) == 0 && |
if ((ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr)))) |
(ia = ip_rtaddr(ipaddr.sin_addr)) == 0) { |
== NULL && |
|
(ia = ip_rtaddr(ipaddr.sin_addr)) == NULL) { |
type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
code = ICMP_UNREACH_HOST; |
code = ICMP_UNREACH_HOST; |
goto bad; |
goto bad; |
} |
} |
bcopy((caddr_t)&(IA_SIN(ia)->sin_addr), |
bcopy((void *)&ia->ia_addr.sin_addr, |
(caddr_t)(cp + off), sizeof(struct in_addr)); |
(void *)(cp + off), sizeof(struct in_addr)); |
cp[IPOPT_OFFSET] += sizeof(struct in_addr); |
cp[IPOPT_OFFSET] += sizeof(struct in_addr); |
break; |
break; |
|
|
case IPOPT_TS: |
case IPOPT_TS: |
code = cp - (u_char *)ip; |
code = cp - (u_char *)ip; |
ipt = (struct ip_timestamp *)cp; |
ipt = (struct ip_timestamp *)cp; |
if (ipt->ipt_len < 5) |
if (ipt->ipt_len < 4 || ipt->ipt_len > 40) { |
|
code = (u_char *)&ipt->ipt_len - (u_char *)ip; |
goto bad; |
goto bad; |
if (ipt->ipt_ptr > ipt->ipt_len - sizeof (long)) { |
} |
if (++ipt->ipt_oflw == 0) |
if (ipt->ipt_ptr < 5) { |
|
code = (u_char *)&ipt->ipt_ptr - (u_char *)ip; |
|
goto bad; |
|
} |
|
if (ipt->ipt_ptr > ipt->ipt_len - sizeof (int32_t)) { |
|
if (++ipt->ipt_oflw == 0) { |
|
code = (u_char *)&ipt->ipt_ptr - |
|
(u_char *)ip; |
goto bad; |
goto bad; |
|
} |
break; |
break; |
} |
} |
sin = (struct in_addr *)(cp + ipt->ipt_ptr - 1); |
cp0 = (cp + ipt->ipt_ptr - 1); |
switch (ipt->ipt_flg) { |
switch (ipt->ipt_flg) { |
|
|
case IPOPT_TS_TSONLY: |
case IPOPT_TS_TSONLY: |
break; |
break; |
|
|
case IPOPT_TS_TSANDADDR: |
case IPOPT_TS_TSANDADDR: { |
if (ipt->ipt_ptr + sizeof(n_time) + |
struct ifnet *rcvif; |
sizeof(struct in_addr) > ipt->ipt_len) |
int s; |
|
|
|
if (ipt->ipt_ptr - 1 + sizeof(n_time) + |
|
sizeof(struct in_addr) > ipt->ipt_len) { |
|
code = (u_char *)&ipt->ipt_ptr - |
|
(u_char *)ip; |
goto bad; |
goto bad; |
ia = ifptoia(m->m_pkthdr.rcvif); |
} |
bcopy((caddr_t)&IA_SIN(ia)->sin_addr, |
ipaddr.sin_addr = dst; |
(caddr_t)sin, sizeof(struct in_addr)); |
rcvif = m_get_rcvif(m, &s); |
|
ia = ifatoia(ifaof_ifpforaddr(sintosa(&ipaddr), |
|
rcvif)); |
|
m_put_rcvif(rcvif, &s); |
|
if (ia == 0) |
|
continue; |
|
bcopy(&ia->ia_addr.sin_addr, |
|
cp0, sizeof(struct in_addr)); |
ipt->ipt_ptr += sizeof(struct in_addr); |
ipt->ipt_ptr += sizeof(struct in_addr); |
break; |
break; |
|
} |
|
|
case IPOPT_TS_PRESPEC: |
case IPOPT_TS_PRESPEC: |
if (ipt->ipt_ptr + sizeof(n_time) + |
if (ipt->ipt_ptr - 1 + sizeof(n_time) + |
sizeof(struct in_addr) > ipt->ipt_len) |
sizeof(struct in_addr) > ipt->ipt_len) { |
|
code = (u_char *)&ipt->ipt_ptr - |
|
(u_char *)ip; |
goto bad; |
goto bad; |
bcopy((caddr_t)sin, (caddr_t)&ipaddr.sin_addr, |
} |
|
memcpy(&ipaddr.sin_addr, cp0, |
sizeof(struct in_addr)); |
sizeof(struct in_addr)); |
if (ifa_ifwithaddr((SA)&ipaddr) == 0) |
if (ifatoia(ifa_ifwithaddr(sintosa(&ipaddr))) |
|
== NULL) |
continue; |
continue; |
ipt->ipt_ptr += sizeof(struct in_addr); |
ipt->ipt_ptr += sizeof(struct in_addr); |
break; |
break; |
|
|
default: |
default: |
|
/* XXX can't take &ipt->ipt_flg */ |
|
code = (u_char *)&ipt->ipt_ptr - |
|
(u_char *)ip + 1; |
goto bad; |
goto bad; |
} |
} |
ntime = iptime(); |
ntime = iptime(); |
bcopy((caddr_t)&ntime, (caddr_t)cp + ipt->ipt_ptr - 1, |
cp0 = (u_char *) &ntime; /* XXX grumble, GCC... */ |
|
memmove((char *)cp + ipt->ipt_ptr - 1, cp0, |
sizeof(n_time)); |
sizeof(n_time)); |
ipt->ipt_ptr += sizeof(n_time); |
ipt->ipt_ptr += sizeof(n_time); |
} |
} |
} |
} |
if (forward) { |
if (forward) { |
ip_forward(m, 1); |
struct ifnet *rcvif; |
return (1); |
struct psref psref; |
} else |
|
return (0); |
if (ip_forwsrcrt == 0) { |
|
type = ICMP_UNREACH; |
|
code = ICMP_UNREACH_SRCFAIL; |
|
goto bad; |
|
} |
|
|
|
rcvif = m_get_rcvif_psref(m, &psref); |
|
if (__predict_false(rcvif == NULL)) { |
|
type = ICMP_UNREACH; |
|
code = ICMP_UNREACH_HOST; |
|
goto bad; |
|
} |
|
ip_forward(m, 1, rcvif); |
|
m_put_rcvif_psref(rcvif, &psref); |
|
return true; |
|
} |
|
return false; |
bad: |
bad: |
icmp_error(m, type, code); |
icmp_error(m, type, code, 0, 0); |
return (1); |
IP_STATINC(IP_STAT_BADOPTIONS); |
|
return true; |
} |
} |
|
|
/* |
/* |
* Given address of next destination (final or next hop), |
* ip_rtaddr: given address of next destination (final or next hop), |
* return internet address info of interface to be used to get there. |
* return internet address info of interface to be used to get there. |
*/ |
*/ |
struct in_ifaddr * |
static struct in_ifaddr * |
ip_rtaddr(dst) |
ip_rtaddr(struct in_addr dst) |
struct in_addr dst; |
|
{ |
{ |
register struct sockaddr_in *sin; |
struct rtentry *rt; |
|
union { |
|
struct sockaddr dst; |
|
struct sockaddr_in dst4; |
|
} u; |
|
|
|
sockaddr_in_init(&u.dst4, &dst, 0); |
|
|
|
SOFTNET_LOCK(); |
|
rt = rtcache_lookup(&ipforward_rt, &u.dst); |
|
SOFTNET_UNLOCK(); |
|
if (rt == NULL) |
|
return NULL; |
|
|
sin = (struct sockaddr_in *) &ipforward_rt.ro_dst; |
return ifatoia(rt->rt_ifa); |
|
|
if (ipforward_rt.ro_rt == 0 || dst.s_addr != sin->sin_addr.s_addr) { |
|
if (ipforward_rt.ro_rt) { |
|
RTFREE(ipforward_rt.ro_rt); |
|
ipforward_rt.ro_rt = 0; |
|
} |
|
sin->sin_family = AF_INET; |
|
sin->sin_len = sizeof(*sin); |
|
sin->sin_addr = dst; |
|
|
|
rtalloc(&ipforward_rt); |
|
} |
|
if (ipforward_rt.ro_rt == 0) |
|
return ((struct in_ifaddr *)0); |
|
return ((struct in_ifaddr *) ipforward_rt.ro_rt->rt_ifa); |
|
} |
} |
|
|
/* |
/* |
* Save incoming source route for use in replies, |
* save_rte: save incoming source route for use in replies, to be picked |
* to be picked up later by ip_srcroute if the receiver is interested. |
* up later by ip_srcroute if the receiver is interested. |
*/ |
*/ |
save_rte(option, dst) |
static void |
u_char *option; |
save_rte(u_char *option, struct in_addr dst) |
struct in_addr dst; |
|
{ |
{ |
unsigned olen; |
unsigned olen; |
|
|
olen = option[IPOPT_OLEN]; |
olen = option[IPOPT_OLEN]; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("save_rte: olen %d\n", olen); |
|
#endif |
|
if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) |
if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) |
return; |
return; |
bcopy((caddr_t)option, (caddr_t)ip_srcrt.srcopt, olen); |
memcpy((void *)ip_srcrt.srcopt, (void *)option, olen); |
ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr); |
ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr); |
ip_srcrt.dst = dst; |
ip_srcrt.dst = dst; |
} |
} |
Line 820 save_rte(option, dst) |
|
Line 1153 save_rte(option, dst) |
|
* The first hop is placed before the options, will be removed later. |
* The first hop is placed before the options, will be removed later. |
*/ |
*/ |
struct mbuf * |
struct mbuf * |
ip_srcroute() |
ip_srcroute(void) |
{ |
{ |
register struct in_addr *p, *q; |
struct in_addr *p, *q; |
register struct mbuf *m; |
struct mbuf *m; |
|
|
if (ip_nhops == 0) |
if (ip_nhops == 0) |
return ((struct mbuf *)0); |
return NULL; |
m = m_get(M_DONTWAIT, MT_SOOPTS); |
m = m_get(M_DONTWAIT, MT_SOOPTS); |
if (m == 0) |
if (m == 0) |
return ((struct mbuf *)0); |
return NULL; |
|
|
|
MCLAIM(m, &inetdomain.dom_mowner); |
#define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt)) |
#define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt)) |
|
|
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */ |
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */ |
m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) + |
m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) + |
OPTSIZ; |
OPTSIZ; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len); |
|
#endif |
|
|
|
/* |
/* |
* First save first hop for return route |
* First save first hop for return route |
*/ |
*/ |
p = &ip_srcrt.route[ip_nhops - 1]; |
p = &ip_srcrt.route[ip_nhops - 1]; |
*(mtod(m, struct in_addr *)) = *p--; |
*(mtod(m, struct in_addr *)) = *p--; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" hops %lx", ntohl(mtod(m, struct in_addr *)->s_addr)); |
|
#endif |
|
|
|
/* |
/* |
* Copy option fields and padding (nop) to mbuf. |
* Copy option fields and padding (nop) to mbuf. |
*/ |
*/ |
ip_srcrt.nop = IPOPT_NOP; |
ip_srcrt.nop = IPOPT_NOP; |
ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF; |
ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF; |
bcopy((caddr_t)&ip_srcrt.nop, |
memmove(mtod(m, char *) + sizeof(struct in_addr), &ip_srcrt.nop, |
mtod(m, caddr_t) + sizeof(struct in_addr), OPTSIZ); |
OPTSIZ); |
q = (struct in_addr *)(mtod(m, caddr_t) + |
q = (struct in_addr *)(mtod(m, char *) + |
sizeof(struct in_addr) + OPTSIZ); |
sizeof(struct in_addr) + OPTSIZ); |
#undef OPTSIZ |
#undef OPTSIZ |
/* |
/* |
|
|
* reversing the path (pointers are now aligned). |
* reversing the path (pointers are now aligned). |
*/ |
*/ |
while (p >= ip_srcrt.route) { |
while (p >= ip_srcrt.route) { |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" %lx", ntohl(q->s_addr)); |
|
#endif |
|
*q++ = *p--; |
*q++ = *p--; |
} |
} |
/* |
/* |
* Last hop goes to final destination. |
* Last hop goes to final destination. |
*/ |
*/ |
*q = ip_srcrt.dst; |
*q = ip_srcrt.dst; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" %lx\n", ntohl(q->s_addr)); |
|
#endif |
|
return (m); |
return (m); |
} |
} |
|
|
/* |
const int inetctlerrmap[PRC_NCMDS] = { |
* Strip out IP options, at higher |
[PRC_MSGSIZE] = EMSGSIZE, |
* level protocol in the kernel. |
[PRC_HOSTDEAD] = EHOSTDOWN, |
* Second argument is buffer to which options |
[PRC_HOSTUNREACH] = EHOSTUNREACH, |
* will be moved, and return value is their length. |
[PRC_UNREACH_NET] = EHOSTUNREACH, |
* XXX should be deleted; last arg currently ignored. |
[PRC_UNREACH_HOST] = EHOSTUNREACH, |
*/ |
[PRC_UNREACH_PROTOCOL] = ECONNREFUSED, |
ip_stripoptions(m, mopt) |
[PRC_UNREACH_PORT] = ECONNREFUSED, |
register struct mbuf *m; |
[PRC_UNREACH_SRCFAIL] = EHOSTUNREACH, |
struct mbuf *mopt; |
[PRC_PARAMPROB] = ENOPROTOOPT, |
{ |
}; |
register int i; |
|
struct ip *ip = mtod(m, struct ip *); |
|
register caddr_t opts; |
|
int olen; |
|
|
|
olen = (ip->ip_hl<<2) - sizeof (struct ip); |
void |
opts = (caddr_t)(ip + 1); |
ip_fasttimo(void) |
i = m->m_len - (sizeof (struct ip) + olen); |
{ |
bcopy(opts + olen, opts, (unsigned)i); |
if (ip_drainwanted) { |
m->m_len -= olen; |
ip_drain(); |
if (m->m_flags & M_PKTHDR) |
ip_drainwanted = 0; |
m->m_pkthdr.len -= olen; |
} |
ip->ip_hl = sizeof(struct ip) >> 2; |
|
} |
} |
|
|
u_char inetctlerrmap[PRC_NCMDS] = { |
void |
0, 0, 0, 0, |
ip_drainstub(void) |
0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH, |
{ |
EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED, |
ip_drainwanted = 1; |
EMSGSIZE, EHOSTUNREACH, 0, 0, |
} |
0, 0, 0, 0, |
|
ENOPROTOOPT |
|
}; |
|
|
|
/* |
/* |
* Forward a packet. If some error occurs return the sender |
* Forward a packet. If some error occurs return the sender |
Line 932 u_char inetctlerrmap[PRC_NCMDS] = { |
|
Line 1242 u_char inetctlerrmap[PRC_NCMDS] = { |
|
* The srcrt parameter indicates whether the packet is being forwarded |
* The srcrt parameter indicates whether the packet is being forwarded |
* via a source route. |
* via a source route. |
*/ |
*/ |
ip_forward(m, srcrt) |
static void |
struct mbuf *m; |
ip_forward(struct mbuf *m, int srcrt, struct ifnet *rcvif) |
int srcrt; |
|
{ |
{ |
register struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
register struct sockaddr_in *sin; |
struct rtentry *rt; |
register struct rtentry *rt; |
int error, type = 0, code = 0, destmtu = 0; |
int error, type = 0, code; |
|
struct mbuf *mcopy; |
struct mbuf *mcopy; |
struct in_addr dest; |
n_long dest; |
|
union { |
|
struct sockaddr dst; |
|
struct sockaddr_in dst4; |
|
} u; |
|
uint64_t *ips; |
|
|
dest.s_addr = 0; |
KASSERTMSG(cpu_softintr_p(), "ip_forward: not in the software " |
#ifdef DIAGNOSTIC |
"interrupt handler; synchronization assumptions violated"); |
if (ipprintfs) |
|
printf("forward: src %x dst %x ttl %x\n", ip->ip_src, |
/* |
ip->ip_dst, ip->ip_ttl); |
* We are now in the output path. |
#endif |
*/ |
if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { |
MCLAIM(m, &ip_tx_mowner); |
ipstat.ips_cantforward++; |
|
|
/* |
|
* Clear any in-bound checksum flags for this packet. |
|
*/ |
|
m->m_pkthdr.csum_flags = 0; |
|
|
|
dest = 0; |
|
if (m->m_flags & (M_BCAST|M_MCAST) || in_canforward(ip->ip_dst) == 0) { |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
m_freem(m); |
m_freem(m); |
return; |
return; |
} |
} |
HTONS(ip->ip_id); |
|
|
SOFTNET_LOCK(); |
|
|
if (ip->ip_ttl <= IPTTLDEC) { |
if (ip->ip_ttl <= IPTTLDEC) { |
icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest); |
icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0); |
|
SOFTNET_UNLOCK(); |
return; |
return; |
} |
} |
ip->ip_ttl -= IPTTLDEC; |
|
|
|
sin = (struct sockaddr_in *)&ipforward_rt.ro_dst; |
sockaddr_in_init(&u.dst4, &ip->ip_dst, 0); |
if ((rt = ipforward_rt.ro_rt) == 0 || |
|
ip->ip_dst.s_addr != sin->sin_addr.s_addr) { |
if ((rt = rtcache_lookup(&ipforward_rt, &u.dst)) == NULL) { |
if (ipforward_rt.ro_rt) { |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, dest, 0); |
RTFREE(ipforward_rt.ro_rt); |
SOFTNET_UNLOCK(); |
ipforward_rt.ro_rt = 0; |
return; |
} |
|
sin->sin_family = AF_INET; |
|
sin->sin_len = sizeof(*sin); |
|
sin->sin_addr = ip->ip_dst; |
|
|
|
rtalloc(&ipforward_rt); |
|
if (ipforward_rt.ro_rt == 0) { |
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, dest); |
|
return; |
|
} |
|
rt = ipforward_rt.ro_rt; |
|
} |
} |
|
|
/* |
/* |
* Save at most 64 bytes of the packet in case |
* Save at most 68 bytes of the packet in case |
* we need to generate an ICMP message to the src. |
* we need to generate an ICMP message to the src. |
|
* Pullup to avoid sharing mbuf cluster between m and mcopy. |
*/ |
*/ |
mcopy = m_copy(m, 0, imin((int)ip->ip_len, 64)); |
mcopy = m_copym(m, 0, imin(ntohs(ip->ip_len), 68), M_DONTWAIT); |
|
if (mcopy) |
|
mcopy = m_pullup(mcopy, ip->ip_hl << 2); |
|
|
|
ip->ip_ttl -= IPTTLDEC; |
|
|
#ifdef GATEWAY |
|
ip_ifmatrix[rt->rt_ifp->if_index + |
|
if_index * m->m_pkthdr.rcvif->if_index]++; |
|
#endif |
|
/* |
/* |
* If forwarding packet using same interface that it came in on, |
* If forwarding packet using same interface that it came in on, |
* perhaps should send a redirect to sender to shortcut a hop. |
* perhaps should send a redirect to sender to shortcut a hop. |
Line 998 ip_forward(m, srcrt) |
|
Line 1311 ip_forward(m, srcrt) |
|
* Also, don't send redirect if forwarding using a default route |
* Also, don't send redirect if forwarding using a default route |
* or a route modified by a redirect. |
* or a route modified by a redirect. |
*/ |
*/ |
#define satosin(sa) ((struct sockaddr_in *)(sa)) |
if (rt->rt_ifp == rcvif && |
if (rt->rt_ifp == m->m_pkthdr.rcvif && |
|
(rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 && |
(rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 && |
satosin(rt_key(rt))->sin_addr.s_addr != 0 && |
!in_nullhost(satocsin(rt_getkey(rt))->sin_addr) && |
ipsendredirects && !srcrt) { |
ipsendredirects && !srcrt) { |
struct in_ifaddr *ia; |
if (rt->rt_ifa && |
u_long src = ntohl(ip->ip_src.s_addr); |
(ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == |
u_long dst = ntohl(ip->ip_dst.s_addr); |
ifatoia(rt->rt_ifa)->ia_subnet) { |
|
if (rt->rt_flags & RTF_GATEWAY) |
if ((ia = ifptoia(m->m_pkthdr.rcvif)) && |
dest = satosin(rt->rt_gateway)->sin_addr.s_addr; |
(src & ia->ia_subnetmask) == ia->ia_subnet) { |
else |
if (rt->rt_flags & RTF_GATEWAY) |
dest = ip->ip_dst.s_addr; |
dest = satosin(rt->rt_gateway)->sin_addr; |
/* |
else |
* Router requirements says to only send host |
dest = ip->ip_dst; |
* redirects. |
/* |
*/ |
* If the destination is reached by a route to host, |
type = ICMP_REDIRECT; |
* is on a subnet of a local net, or is directly |
code = ICMP_REDIRECT_HOST; |
* on the attached net (!), use host redirect. |
|
* (We may be the correct first hop for other subnets.) |
|
*/ |
|
#define RTA(rt) ((struct in_ifaddr *)(rt->rt_ifa)) |
|
type = ICMP_REDIRECT; |
|
if ((rt->rt_flags & RTF_HOST) || |
|
(rt->rt_flags & RTF_GATEWAY) == 0) |
|
code = ICMP_REDIRECT_HOST; |
|
else if (RTA(rt)->ia_subnetmask != RTA(rt)->ia_netmask && |
|
(dst & RTA(rt)->ia_netmask) == RTA(rt)->ia_net) |
|
code = ICMP_REDIRECT_HOST; |
|
else |
|
code = ICMP_REDIRECT_NET; |
|
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("redirect (%d) to %x\n", code, dest.s_addr); |
|
#endif |
|
} |
} |
} |
} |
|
|
error = ip_output(m, (struct mbuf *)0, &ipforward_rt, IP_FORWARDING); |
error = ip_output(m, NULL, &ipforward_rt, |
if (error) |
(IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
ipstat.ips_cantforward++; |
NULL, NULL); |
else { |
|
ipstat.ips_forward++; |
if (error) { |
if (type) |
IP_STATINC(IP_STAT_CANTFORWARD); |
ipstat.ips_redirectsent++; |
goto error; |
else { |
} |
if (mcopy) |
|
m_freem(mcopy); |
ips = IP_STAT_GETREF(); |
return; |
ips[IP_STAT_FORWARD]++; |
} |
|
|
if (type) { |
|
ips[IP_STAT_REDIRECTSENT]++; |
|
IP_STAT_PUTREF(); |
|
goto redirect; |
|
} |
|
|
|
IP_STAT_PUTREF(); |
|
if (mcopy) { |
|
#ifdef GATEWAY |
|
if (mcopy->m_flags & M_CANFASTFWD) |
|
ipflow_create(&ipforward_rt, mcopy); |
|
#endif |
|
m_freem(mcopy); |
} |
} |
if (mcopy == NULL) |
|
|
SOFTNET_UNLOCK(); |
|
return; |
|
|
|
redirect: |
|
error: |
|
if (mcopy == NULL) { |
|
SOFTNET_UNLOCK(); |
return; |
return; |
|
} |
|
|
switch (error) { |
switch (error) { |
|
|
case 0: /* forwarded, but need redirect */ |
case 0: /* forwarded, but need redirect */ |
Line 1069 ip_forward(m, srcrt) |
|
Line 1386 ip_forward(m, srcrt) |
|
case EMSGSIZE: |
case EMSGSIZE: |
type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
code = ICMP_UNREACH_NEEDFRAG; |
code = ICMP_UNREACH_NEEDFRAG; |
ipstat.ips_cantfrag++; |
|
|
if ((rt = rtcache_validate(&ipforward_rt)) != NULL) |
|
destmtu = rt->rt_ifp->if_mtu; |
|
#ifdef IPSEC |
|
if (ipsec_used) |
|
(void)ipsec4_forward(mcopy, &destmtu); |
|
#endif |
|
IP_STATINC(IP_STAT_CANTFRAG); |
break; |
break; |
|
|
case ENOBUFS: |
case ENOBUFS: |
type = ICMP_SOURCEQUENCH; |
/* |
code = 0; |
* Do not generate ICMP_SOURCEQUENCH as required in RFC 1812, |
break; |
* Requirements for IP Version 4 Routers. Source quench can |
|
* big problem under DoS attacks or if the underlying |
|
* interface is rate-limited. |
|
*/ |
|
if (mcopy) |
|
m_freem(mcopy); |
|
SOFTNET_UNLOCK(); |
|
return; |
} |
} |
icmp_error(mcopy, type, code, dest); |
icmp_error(mcopy, type, code, dest, destmtu); |
|
SOFTNET_UNLOCK(); |
|
} |
|
|
|
void |
|
ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip, |
|
struct mbuf *m) |
|
{ |
|
struct socket *so = inp->inp_socket; |
|
ifnet_t *ifp; |
|
int inpflags = inp->inp_flags; |
|
struct psref psref; |
|
|
|
ifp = m_get_rcvif_psref(m, &psref); |
|
if (__predict_false(ifp == NULL)) |
|
return; /* XXX should report error? */ |
|
|
|
if (so->so_options & SO_TIMESTAMP |
|
#ifdef SO_OTIMESTAMP |
|
|| so->so_options & SO_OTIMESTAMP |
|
#endif |
|
) { |
|
struct timeval tv; |
|
|
|
microtime(&tv); |
|
#ifdef SO_OTIMESTAMP |
|
if (so->so_options & SO_OTIMESTAMP) { |
|
struct timeval50 tv50; |
|
timeval_to_timeval50(&tv, &tv50); |
|
*mp = sbcreatecontrol((void *) &tv50, sizeof(tv50), |
|
SCM_OTIMESTAMP, SOL_SOCKET); |
|
} else |
|
#endif |
|
*mp = sbcreatecontrol((void *) &tv, sizeof(tv), |
|
SCM_TIMESTAMP, SOL_SOCKET); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
if (inpflags & INP_RECVDSTADDR) { |
|
*mp = sbcreatecontrol((void *) &ip->ip_dst, |
|
sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
if (inpflags & INP_RECVPKTINFO) { |
|
struct in_pktinfo ipi; |
|
ipi.ipi_addr = ip->ip_src; |
|
ipi.ipi_ifindex = ifp->if_index; |
|
*mp = sbcreatecontrol((void *) &ipi, |
|
sizeof(ipi), IP_RECVPKTINFO, IPPROTO_IP); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
if (inpflags & INP_PKTINFO) { |
|
struct in_pktinfo ipi; |
|
ipi.ipi_addr = ip->ip_dst; |
|
ipi.ipi_ifindex = ifp->if_index; |
|
*mp = sbcreatecontrol((void *) &ipi, |
|
sizeof(ipi), IP_PKTINFO, IPPROTO_IP); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
if (inpflags & INP_RECVIF) { |
|
struct sockaddr_dl sdl; |
|
|
|
sockaddr_dl_init(&sdl, sizeof(sdl), ifp ? |
|
ifp->if_index : 0, 0, NULL, 0, NULL, 0); |
|
*mp = sbcreatecontrol(&sdl, sdl.sdl_len, IP_RECVIF, IPPROTO_IP); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
if (inpflags & INP_RECVTTL) { |
|
*mp = sbcreatecontrol((void *) &ip->ip_ttl, |
|
sizeof(uint8_t), IP_RECVTTL, IPPROTO_IP); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
m_put_rcvif_psref(ifp, &psref); |
|
} |
|
|
|
/* |
|
* sysctl helper routine for net.inet.ip.forwsrcrt. |
|
*/ |
|
static int |
|
sysctl_net_inet_ip_forwsrcrt(SYSCTLFN_ARGS) |
|
{ |
|
int error, tmp; |
|
struct sysctlnode node; |
|
|
|
node = *rnode; |
|
tmp = ip_forwsrcrt; |
|
node.sysctl_data = &tmp; |
|
error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
|
if (error || newp == NULL) |
|
return (error); |
|
|
|
error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_FORWSRCRT, |
|
0, NULL, NULL, NULL); |
|
if (error) |
|
return (error); |
|
|
|
ip_forwsrcrt = tmp; |
|
|
|
return (0); |
|
} |
|
|
|
/* |
|
* sysctl helper routine for net.inet.ip.mtudisctimeout. checks the |
|
* range of the new value and tweaks timers if it changes. |
|
*/ |
|
static int |
|
sysctl_net_inet_ip_pmtudto(SYSCTLFN_ARGS) |
|
{ |
|
int error, tmp; |
|
struct sysctlnode node; |
|
|
|
node = *rnode; |
|
tmp = ip_mtudisc_timeout; |
|
node.sysctl_data = &tmp; |
|
error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
|
if (error || newp == NULL) |
|
return (error); |
|
if (tmp < 0) |
|
return (EINVAL); |
|
|
|
mutex_enter(softnet_lock); |
|
|
|
ip_mtudisc_timeout = tmp; |
|
rt_timer_queue_change(ip_mtudisc_timeout_q, ip_mtudisc_timeout); |
|
|
|
mutex_exit(softnet_lock); |
|
|
|
return (0); |
|
} |
|
|
|
static int |
|
sysctl_net_inet_ip_stats(SYSCTLFN_ARGS) |
|
{ |
|
|
|
return (NETSTAT_SYSCTL(ipstat_percpu, IP_NSTATS)); |
|
} |
|
|
|
static void |
|
sysctl_net_inet_ip_setup(struct sysctllog **clog) |
|
{ |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "inet", |
|
SYSCTL_DESCR("PF_INET related settings"), |
|
NULL, 0, NULL, 0, |
|
CTL_NET, PF_INET, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "ip", |
|
SYSCTL_DESCR("IPv4 related settings"), |
|
NULL, 0, NULL, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, CTL_EOL); |
|
|
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "forwarding", |
|
SYSCTL_DESCR("Enable forwarding of INET datagrams"), |
|
NULL, 0, &ipforwarding, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_FORWARDING, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "redirect", |
|
SYSCTL_DESCR("Enable sending of ICMP redirect messages"), |
|
NULL, 0, &ipsendredirects, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_SENDREDIRECTS, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "ttl", |
|
SYSCTL_DESCR("Default TTL for an INET datagram"), |
|
NULL, 0, &ip_defttl, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_DEFTTL, CTL_EOL); |
|
#ifdef IPCTL_DEFMTU |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT /* |CTLFLAG_READWRITE? */, |
|
CTLTYPE_INT, "mtu", |
|
SYSCTL_DESCR("Default MTA for an INET route"), |
|
NULL, 0, &ip_mtu, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_DEFMTU, CTL_EOL); |
|
#endif /* IPCTL_DEFMTU */ |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "forwsrcrt", |
|
SYSCTL_DESCR("Enable forwarding of source-routed " |
|
"datagrams"), |
|
sysctl_net_inet_ip_forwsrcrt, 0, &ip_forwsrcrt, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_FORWSRCRT, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "directed-broadcast", |
|
SYSCTL_DESCR("Enable forwarding of broadcast datagrams"), |
|
NULL, 0, &ip_directedbcast, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_DIRECTEDBCAST, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "allowsrcrt", |
|
SYSCTL_DESCR("Accept source-routed datagrams"), |
|
NULL, 0, &ip_allowsrcrt, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_ALLOWSRCRT, CTL_EOL); |
|
|
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "mtudisc", |
|
SYSCTL_DESCR("Use RFC1191 Path MTU Discovery"), |
|
NULL, 0, &ip_mtudisc, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_MTUDISC, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "anonportmin", |
|
SYSCTL_DESCR("Lowest ephemeral port number to assign"), |
|
sysctl_net_inet_ip_ports, 0, &anonportmin, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_ANONPORTMIN, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "anonportmax", |
|
SYSCTL_DESCR("Highest ephemeral port number to assign"), |
|
sysctl_net_inet_ip_ports, 0, &anonportmax, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_ANONPORTMAX, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "mtudisctimeout", |
|
SYSCTL_DESCR("Lifetime of a Path MTU Discovered route"), |
|
sysctl_net_inet_ip_pmtudto, 0, (void *)&ip_mtudisc_timeout, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_MTUDISCTIMEOUT, CTL_EOL); |
|
#ifndef IPNOPRIVPORTS |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "lowportmin", |
|
SYSCTL_DESCR("Lowest privileged ephemeral port number " |
|
"to assign"), |
|
sysctl_net_inet_ip_ports, 0, &lowportmin, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_LOWPORTMIN, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "lowportmax", |
|
SYSCTL_DESCR("Highest privileged ephemeral port number " |
|
"to assign"), |
|
sysctl_net_inet_ip_ports, 0, &lowportmax, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_LOWPORTMAX, CTL_EOL); |
|
#endif /* IPNOPRIVPORTS */ |
|
#if NGRE > 0 |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "grettl", |
|
SYSCTL_DESCR("Default TTL for a gre tunnel datagram"), |
|
NULL, 0, &ip_gre_ttl, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_GRE_TTL, CTL_EOL); |
|
#endif /* NGRE */ |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "checkinterface", |
|
SYSCTL_DESCR("Enable receive side of Strong ES model " |
|
"from RFC1122"), |
|
NULL, 0, &ip_checkinterface, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_CHECKINTERFACE, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "random_id", |
|
SYSCTL_DESCR("Assign random ip_id values"), |
|
NULL, 0, &ip_do_randomid, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_RANDOMID, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "do_loopback_cksum", |
|
SYSCTL_DESCR("Perform IP checksum on loopback"), |
|
NULL, 0, &ip_do_loopback_cksum, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_LOOPBACKCKSUM, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_STRUCT, "stats", |
|
SYSCTL_DESCR("IP statistics"), |
|
sysctl_net_inet_ip_stats, 0, NULL, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, IPCTL_STATS, |
|
CTL_EOL); |
|
#if NARP |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "dad_count", |
|
SYSCTL_DESCR("Number of Duplicate Address Detection " |
|
"probes to send"), |
|
NULL, 0, &ip_dad_count, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_DAD_COUNT, CTL_EOL); |
|
#endif |
|
|
|
/* anonportalgo RFC6056 subtree */ |
|
const struct sysctlnode *portalgo_node; |
|
sysctl_createv(clog, 0, NULL, &portalgo_node, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "anonportalgo", |
|
SYSCTL_DESCR("Anonymous Port Algorithm Selection (RFC 6056)"), |
|
NULL, 0, NULL, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, CTL_CREATE, CTL_EOL); |
|
sysctl_createv(clog, 0, &portalgo_node, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_STRING, "available", |
|
SYSCTL_DESCR("available algorithms"), |
|
sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN, |
|
CTL_CREATE, CTL_EOL); |
|
sysctl_createv(clog, 0, &portalgo_node, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_STRING, "selected", |
|
SYSCTL_DESCR("selected algorithm"), |
|
sysctl_portalgo_selected4, 0, NULL, PORTALGO_MAXLEN, |
|
CTL_CREATE, CTL_EOL); |
|
sysctl_createv(clog, 0, &portalgo_node, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_STRUCT, "reserve", |
|
SYSCTL_DESCR("bitmap of reserved ports"), |
|
sysctl_portalgo_reserve4, 0, NULL, 0, |
|
CTL_CREATE, CTL_EOL); |
|
} |
|
|
|
void |
|
ip_statinc(u_int stat) |
|
{ |
|
|
|
KASSERT(stat < IP_NSTATS); |
|
IP_STATINC(stat); |
} |
} |