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701 lines
18 KiB
701 lines
18 KiB
/* $OpenBSD: ip_icmp.c,v 1.18 1999/09/26 23:59:15 deraadt Exp $ */
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/* $NetBSD: ip_icmp.c,v 1.19 1996/02/13 23:42:22 christos Exp $ */
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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
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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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* @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94
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*/
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/*
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%%% portions-copyright-nrl-95
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Portions of this software are Copyright 1995-1998 by Randall Atkinson,
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Ronald Lee, Daniel McDonald, Bao Phan, and Chris Winters. All Rights
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Reserved. All rights under this copyright have been assigned to the US
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Naval Research Laboratory (NRL). The NRL Copyright Notice and License
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Agreement Version 1.1 (January 17, 1995) applies to these portions of the
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software.
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You should have received a copy of the license with this software. If you
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didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <vm/vm.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_var.h>
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#include <netinet/icmp_var.h>
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#include <machine/stdarg.h>
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/*
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* ICMP routines: error generation, receive packet processing, and
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* routines to turnaround packets back to the originator, and
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* host table maintenance routines.
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*/
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int icmpmaskrepl = 0;
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int icmpbmcastecho = 0;
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#ifdef ICMPPRINTFS
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int icmpprintfs = 0;
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#endif
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extern struct protosw inetsw[];
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/*
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* Generate an error packet of type error
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* in response to bad packet ip.
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*
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* The ip packet inside has ip_off and ip_len in host byte order.
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*/
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void
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icmp_error(n, type, code, dest, destifp)
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struct mbuf *n;
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int type, code;
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n_long dest;
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struct ifnet *destifp;
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{
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register struct ip *oip = mtod(n, struct ip *), *nip;
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register unsigned oiplen = oip->ip_hl << 2;
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register struct icmp *icp;
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struct mbuf *m, m0;
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unsigned icmplen;
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#ifdef ICMPPRINTFS
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if (icmpprintfs)
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printf("icmp_error(%x, %d, %d)\n", oip, type, code);
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#endif
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if (type != ICMP_REDIRECT)
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icmpstat.icps_error++;
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/*
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* Don't send error if not the first fragment of message.
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* Don't error if the old packet protocol was ICMP
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* error message, only known informational types.
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*/
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if (oip->ip_off &~ (IP_MF|IP_DF))
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goto freeit;
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if (oip->ip_p == IPPROTO_ICMP && type != ICMP_REDIRECT &&
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n->m_len >= oiplen + ICMP_MINLEN &&
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!ICMP_INFOTYPE(((struct icmp *)((caddr_t)oip + oiplen))->icmp_type)) {
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icmpstat.icps_oldicmp++;
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goto freeit;
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}
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/* Don't send error in response to a multicast or broadcast packet */
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if (n->m_flags & (M_BCAST|M_MCAST))
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goto freeit;
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/*
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* First, formulate icmp message
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*/
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m = m_gethdr(M_DONTWAIT, MT_HEADER);
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if (m == NULL)
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goto freeit;
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icmplen = oiplen + min(8, oip->ip_len);
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m->m_len = icmplen + ICMP_MINLEN;
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MH_ALIGN(m, m->m_len);
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icp = mtod(m, struct icmp *);
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if ((u_int)type > ICMP_MAXTYPE)
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panic("icmp_error");
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icmpstat.icps_outhist[type]++;
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icp->icmp_type = type;
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if (type == ICMP_REDIRECT)
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icp->icmp_gwaddr.s_addr = dest;
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else {
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icp->icmp_void = 0;
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/*
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* The following assignments assume an overlay with the
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* zeroed icmp_void field.
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*/
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if (type == ICMP_PARAMPROB) {
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icp->icmp_pptr = code;
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code = 0;
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} else if (type == ICMP_UNREACH &&
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code == ICMP_UNREACH_NEEDFRAG && destifp)
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icp->icmp_nextmtu = htons(destifp->if_mtu);
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}
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icp->icmp_code = code;
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bcopy((caddr_t)oip, (caddr_t)&icp->icmp_ip, icmplen);
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nip = &icp->icmp_ip;
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nip->ip_off = htons(nip->ip_off);
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nip->ip_len = htons(nip->ip_len);
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m0.m_next = NULL; /* correct nip->ip_sum */
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m0.m_data = (char *)nip;
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m0.m_len = nip->ip_hl << 2;
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nip->ip_sum = 0;
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nip->ip_sum = in_cksum(&m0, nip->ip_hl << 2);
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/*
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* Now, copy old ip header (without options)
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* in front of icmp message.
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*/
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if (m->m_data - sizeof(struct ip) < m->m_pktdat)
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panic("icmp len");
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m->m_data -= sizeof(struct ip);
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m->m_len += sizeof(struct ip);
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m->m_pkthdr.len = m->m_len;
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m->m_pkthdr.rcvif = n->m_pkthdr.rcvif;
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nip = mtod(m, struct ip *);
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bcopy((caddr_t)oip, (caddr_t)nip, sizeof(struct ip));
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nip->ip_off = htons(nip->ip_off);
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nip->ip_len = m->m_len;
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nip->ip_hl = sizeof(struct ip) >> 2;
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nip->ip_p = IPPROTO_ICMP;
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nip->ip_tos = 0;
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icmp_reflect(m);
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freeit:
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m_freem(n);
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}
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static struct sockaddr_in icmpsrc = { sizeof (struct sockaddr_in), AF_INET };
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static struct sockaddr_in icmpdst = { sizeof (struct sockaddr_in), AF_INET };
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static struct sockaddr_in icmpgw = { sizeof (struct sockaddr_in), AF_INET };
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struct sockaddr_in icmpmask = { 8, 0 };
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/*
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* Process a received ICMP message.
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*/
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void
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#if __STDC__
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icmp_input(struct mbuf *m, ...)
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#else
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icmp_input(m, va_alist)
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struct mbuf *m;
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va_dcl
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#endif
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{
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register struct icmp *icp;
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register struct ip *ip = mtod(m, struct ip *);
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int icmplen = ip->ip_len;
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register int i;
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struct in_ifaddr *ia;
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void *(*ctlfunc) __P((int, struct sockaddr *, void *));
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int code;
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extern u_char ip_protox[];
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int hlen;
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va_list ap;
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va_start(ap, m);
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hlen = va_arg(ap, int);
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va_end(ap);
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/*
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* Locate icmp structure in mbuf, and check
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* that not corrupted and of at least minimum length.
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*/
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#ifdef ICMPPRINTFS
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if (icmpprintfs) {
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char buf[4*sizeof "123"];
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strcpy(buf, inet_ntoa(ip->ip_dst));
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printf("icmp_input from %s to %s, len %d\n",
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inet_ntoa(ip->ip_src), buf, icmplen);
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}
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#endif
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if (icmplen < ICMP_MINLEN) {
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icmpstat.icps_tooshort++;
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goto freeit;
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}
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i = hlen + min(icmplen, ICMP_ADVLENMIN);
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if (m->m_len < i && (m = m_pullup(m, i)) == 0) {
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icmpstat.icps_tooshort++;
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return;
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}
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ip = mtod(m, struct ip *);
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m->m_len -= hlen;
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m->m_data += hlen;
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icp = mtod(m, struct icmp *);
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if (in_cksum(m, icmplen)) {
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icmpstat.icps_checksum++;
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goto freeit;
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}
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m->m_len += hlen;
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m->m_data -= hlen;
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#ifdef ICMPPRINTFS
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/*
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* Message type specific processing.
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*/
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if (icmpprintfs)
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printf("icmp_input, type %d code %d\n", icp->icmp_type,
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icp->icmp_code);
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#endif
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if (icp->icmp_type > ICMP_MAXTYPE)
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goto raw;
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icmpstat.icps_inhist[icp->icmp_type]++;
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code = icp->icmp_code;
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switch (icp->icmp_type) {
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case ICMP_UNREACH:
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switch (code) {
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case ICMP_UNREACH_NET:
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case ICMP_UNREACH_HOST:
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case ICMP_UNREACH_PROTOCOL:
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case ICMP_UNREACH_PORT:
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case ICMP_UNREACH_SRCFAIL:
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code += PRC_UNREACH_NET;
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break;
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case ICMP_UNREACH_NEEDFRAG:
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#ifdef INET6
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if (icp->icmp_nextmtu) {
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extern int ipv6_trans_mtu
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__P((struct mbuf **, int, int));
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struct mbuf *m0 = m;
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/*
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* Do cool v4-related path MTU, for now,
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* only v6-in-v4 can handle it.
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*/
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if (icmplen >= ICMP_V6ADVLENMIN &&
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icmplen >= ICMP_V6ADVLEN(icp) &&
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icp->icmp_ip.ip_p == IPPROTO_IPV6) {
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/*
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* ipv6_trans_mtu returns 1 if
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* the mbuf is still intact.
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*/
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if (ipv6_trans_mtu(&m0,icp->icmp_nextmtu,
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hlen + ICMP_V6ADVLEN(icp))) {
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m = m0;
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goto raw;
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} else
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return;
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}
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}
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#endif /* INET6 */
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code = PRC_MSGSIZE;
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break;
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case ICMP_UNREACH_NET_UNKNOWN:
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case ICMP_UNREACH_NET_PROHIB:
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case ICMP_UNREACH_TOSNET:
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code = PRC_UNREACH_NET;
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break;
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case ICMP_UNREACH_HOST_UNKNOWN:
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case ICMP_UNREACH_ISOLATED:
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case ICMP_UNREACH_HOST_PROHIB:
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case ICMP_UNREACH_TOSHOST:
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case ICMP_UNREACH_FILTER_PROHIB:
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case ICMP_UNREACH_HOST_PRECEDENCE:
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case ICMP_UNREACH_PRECEDENCE_CUTOFF:
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code = PRC_UNREACH_HOST;
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break;
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default:
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goto badcode;
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}
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goto deliver;
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case ICMP_TIMXCEED:
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if (code > 1)
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goto badcode;
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code += PRC_TIMXCEED_INTRANS;
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goto deliver;
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case ICMP_PARAMPROB:
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if (code > 1)
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goto badcode;
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code = PRC_PARAMPROB;
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goto deliver;
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case ICMP_SOURCEQUENCH:
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if (code)
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goto badcode;
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code = PRC_QUENCH;
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deliver:
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/*
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* Problem with datagram; advise higher level routines.
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*/
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if (icmplen < ICMP_ADVLENMIN || icmplen < ICMP_ADVLEN(icp) ||
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icp->icmp_ip.ip_hl < (sizeof(struct ip) >> 2)) {
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icmpstat.icps_badlen++;
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goto freeit;
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}
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if (IN_MULTICAST(icp->icmp_ip.ip_dst.s_addr))
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goto badcode;
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NTOHS(icp->icmp_ip.ip_len);
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#ifdef INET6
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/* Get more contiguous data for a v6 in v4 ICMP message. */
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if (icp->icmp_ip.ip_p == IPPROTO_IPV6) {
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if (icmplen < ICMP_V6ADVLENMIN ||
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icmplen < ICMP_V6ADVLEN(icp)) {
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icmpstat.icps_badlen++;
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goto freeit;
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} else {
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if (!(m = m_pullup(m, (ip->ip_hl << 2) +
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ICMP_V6ADVLEN(icp)))) {
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icmpstat.icps_tooshort++;
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return;
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}
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ip = mtod(m, struct ip *);
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icp = (struct icmp *)(m->m_data + (ip->ip_hl << 2));
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}
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}
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#endif /* INET6 */
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#ifdef ICMPPRINTFS
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if (icmpprintfs)
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printf("deliver to protocol %d\n", icp->icmp_ip.ip_p);
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#endif
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icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
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ctlfunc = inetsw[ip_protox[icp->icmp_ip.ip_p]].pr_ctlinput;
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if (ctlfunc)
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(*ctlfunc)(code, sintosa(&icmpsrc), &icp->icmp_ip);
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break;
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badcode:
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icmpstat.icps_badcode++;
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break;
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case ICMP_ECHO:
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if (!icmpbmcastecho &&
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(m->m_flags & (M_MCAST | M_BCAST)) != 0) {
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icmpstat.icps_bmcastecho++;
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break;
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}
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icp->icmp_type = ICMP_ECHOREPLY;
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goto reflect;
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case ICMP_TSTAMP:
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if (!icmpbmcastecho &&
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(m->m_flags & (M_MCAST | M_BCAST)) != 0) {
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icmpstat.icps_bmcastecho++;
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break;
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}
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if (icmplen < ICMP_TSLEN) {
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icmpstat.icps_badlen++;
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break;
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}
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icp->icmp_type = ICMP_TSTAMPREPLY;
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icp->icmp_rtime = iptime();
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icp->icmp_ttime = icp->icmp_rtime; /* bogus, do later! */
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goto reflect;
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case ICMP_MASKREQ:
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if (icmpmaskrepl == 0)
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break;
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/*
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* We are not able to respond with all ones broadcast
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|
* unless we receive it over a point-to-point interface.
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*/
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if (icmplen < ICMP_MASKLEN) {
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icmpstat.icps_badlen++;
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break;
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}
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if (ip->ip_dst.s_addr == INADDR_BROADCAST ||
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ip->ip_dst.s_addr == INADDR_ANY)
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icmpdst.sin_addr = ip->ip_src;
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|
else
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icmpdst.sin_addr = ip->ip_dst;
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ia = ifatoia(ifaof_ifpforaddr(sintosa(&icmpdst),
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m->m_pkthdr.rcvif));
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if (ia == 0)
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break;
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icp->icmp_type = ICMP_MASKREPLY;
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|
icp->icmp_mask = ia->ia_sockmask.sin_addr.s_addr;
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if (ip->ip_src.s_addr == 0) {
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|
if (ia->ia_ifp->if_flags & IFF_BROADCAST)
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ip->ip_src = ia->ia_broadaddr.sin_addr;
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else if (ia->ia_ifp->if_flags & IFF_POINTOPOINT)
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ip->ip_src = ia->ia_dstaddr.sin_addr;
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}
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reflect:
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ip->ip_len += hlen; /* since ip_input deducts this */
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icmpstat.icps_reflect++;
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icmpstat.icps_outhist[icp->icmp_type]++;
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icmp_reflect(m);
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return;
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case ICMP_REDIRECT:
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|
if (code > 3)
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goto badcode;
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if (icmplen < ICMP_ADVLENMIN || icmplen < ICMP_ADVLEN(icp) ||
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icp->icmp_ip.ip_hl < (sizeof(struct ip) >> 2)) {
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icmpstat.icps_badlen++;
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break;
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}
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/*
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|
* Short circuit routing redirects to force
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|
* immediate change in the kernel's routing
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|
* tables. The message is also handed to anyone
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|
* listening on a raw socket (e.g. the routing
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|
* daemon for use in updating its tables).
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|
*/
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|
icmpgw.sin_addr = ip->ip_src;
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|
icmpdst.sin_addr = icp->icmp_gwaddr;
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|
#ifdef ICMPPRINTFS
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|
if (icmpprintfs) {
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char buf[4 * sizeof "123"];
|
|
strcpy(buf, inet_ntoa(icp->icmp_ip.ip_dst));
|
|
|
|
printf("redirect dst %s to %s\n",
|
|
buf, inet_ntoa(icp->icmp_gwaddr));
|
|
}
|
|
#endif
|
|
icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
|
|
rtredirect(sintosa(&icmpsrc), sintosa(&icmpdst),
|
|
(struct sockaddr *)0, RTF_GATEWAY | RTF_HOST,
|
|
sintosa(&icmpgw), (struct rtentry **)0);
|
|
pfctlinput(PRC_REDIRECT_HOST, sintosa(&icmpsrc));
|
|
break;
|
|
|
|
/*
|
|
* No kernel processing for the following;
|
|
* just fall through to send to raw listener.
|
|
*/
|
|
case ICMP_ECHOREPLY:
|
|
case ICMP_ROUTERADVERT:
|
|
case ICMP_ROUTERSOLICIT:
|
|
case ICMP_TSTAMPREPLY:
|
|
case ICMP_IREQREPLY:
|
|
case ICMP_MASKREPLY:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
raw:
|
|
rip_input(m, 0);
|
|
return;
|
|
|
|
freeit:
|
|
m_freem(m);
|
|
}
|
|
|
|
/*
|
|
* Reflect the ip packet back to the source
|
|
*/
|
|
void
|
|
icmp_reflect(m)
|
|
struct mbuf *m;
|
|
{
|
|
register struct ip *ip = mtod(m, struct ip *);
|
|
register struct in_ifaddr *ia;
|
|
struct in_addr t;
|
|
struct mbuf *opts = 0;
|
|
int optlen = (ip->ip_hl << 2) - sizeof(struct ip);
|
|
|
|
if (!in_canforward(ip->ip_src) &&
|
|
((ip->ip_src.s_addr & IN_CLASSA_NET) !=
|
|
htonl(IN_LOOPBACKNET << IN_CLASSA_NSHIFT))) {
|
|
m_freem(m); /* Bad return address */
|
|
goto done; /* ip_output() will check for broadcast */
|
|
}
|
|
t = ip->ip_dst;
|
|
ip->ip_dst = ip->ip_src;
|
|
/*
|
|
* If the incoming packet was addressed directly to us,
|
|
* use dst as the src for the reply. Otherwise (broadcast
|
|
* or anonymous), use the address which corresponds
|
|
* to the incoming interface.
|
|
*/
|
|
for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) {
|
|
if (t.s_addr == ia->ia_addr.sin_addr.s_addr)
|
|
break;
|
|
if ((ia->ia_ifp->if_flags & IFF_BROADCAST) &&
|
|
t.s_addr == ia->ia_broadaddr.sin_addr.s_addr)
|
|
break;
|
|
}
|
|
icmpdst.sin_addr = t;
|
|
if (ia == (struct in_ifaddr *)0)
|
|
ia = ifatoia(ifaof_ifpforaddr(sintosa(&icmpdst),
|
|
m->m_pkthdr.rcvif));
|
|
/*
|
|
* The following happens if the packet was not addressed to us,
|
|
* and was received on an interface with no IP address.
|
|
*/
|
|
if (ia == (struct in_ifaddr *)0)
|
|
ia = in_ifaddr.tqh_first;
|
|
t = ia->ia_addr.sin_addr;
|
|
ip->ip_src = t;
|
|
ip->ip_ttl = MAXTTL;
|
|
|
|
if (optlen > 0) {
|
|
register u_char *cp;
|
|
int opt, cnt;
|
|
u_int len;
|
|
|
|
/*
|
|
* Retrieve any source routing from the incoming packet;
|
|
* add on any record-route or timestamp options.
|
|
*/
|
|
cp = (u_char *) (ip + 1);
|
|
if ((opts = ip_srcroute()) == 0 &&
|
|
(opts = m_gethdr(M_DONTWAIT, MT_HEADER))) {
|
|
opts->m_len = sizeof(struct in_addr);
|
|
mtod(opts, struct in_addr *)->s_addr = 0;
|
|
}
|
|
if (opts) {
|
|
#ifdef ICMPPRINTFS
|
|
if (icmpprintfs)
|
|
printf("icmp_reflect optlen %d rt %d => ",
|
|
optlen, opts->m_len);
|
|
#endif
|
|
for (cnt = optlen; cnt > 0; cnt -= len, cp += len) {
|
|
opt = cp[IPOPT_OPTVAL];
|
|
if (opt == IPOPT_EOL)
|
|
break;
|
|
if (opt == IPOPT_NOP)
|
|
len = 1;
|
|
else {
|
|
len = cp[IPOPT_OLEN];
|
|
if (len <= 0 || len > cnt)
|
|
break;
|
|
}
|
|
/*
|
|
* Should check for overflow, but it "can't happen"
|
|
*/
|
|
if (opt == IPOPT_RR || opt == IPOPT_TS ||
|
|
opt == IPOPT_SECURITY) {
|
|
bcopy((caddr_t)cp,
|
|
mtod(opts, caddr_t) + opts->m_len, len);
|
|
opts->m_len += len;
|
|
}
|
|
}
|
|
/* Terminate & pad, if necessary */
|
|
if ((cnt = opts->m_len % 4) != 0) {
|
|
for (; cnt < 4; cnt++) {
|
|
*(mtod(opts, caddr_t) + opts->m_len) =
|
|
IPOPT_EOL;
|
|
opts->m_len++;
|
|
}
|
|
}
|
|
#ifdef ICMPPRINTFS
|
|
if (icmpprintfs)
|
|
printf("%d\n", opts->m_len);
|
|
#endif
|
|
}
|
|
/*
|
|
* Now strip out original options by copying rest of first
|
|
* mbuf's data back, and adjust the IP length.
|
|
*/
|
|
ip->ip_len -= optlen;
|
|
ip->ip_hl = sizeof(struct ip) >> 2;
|
|
m->m_len -= optlen;
|
|
if (m->m_flags & M_PKTHDR)
|
|
m->m_pkthdr.len -= optlen;
|
|
optlen += sizeof(struct ip);
|
|
bcopy((caddr_t)ip + optlen, (caddr_t)(ip + 1),
|
|
(unsigned)(m->m_len - sizeof(struct ip)));
|
|
}
|
|
m->m_flags &= ~(M_BCAST|M_MCAST);
|
|
icmp_send(m, opts);
|
|
done:
|
|
if (opts)
|
|
(void)m_free(opts);
|
|
}
|
|
|
|
/*
|
|
* Send an icmp packet back to the ip level,
|
|
* after supplying a checksum.
|
|
*/
|
|
void
|
|
icmp_send(m, opts)
|
|
register struct mbuf *m;
|
|
struct mbuf *opts;
|
|
{
|
|
register struct ip *ip = mtod(m, struct ip *);
|
|
register int hlen;
|
|
register struct icmp *icp;
|
|
|
|
hlen = ip->ip_hl << 2;
|
|
m->m_data += hlen;
|
|
m->m_len -= hlen;
|
|
icp = mtod(m, struct icmp *);
|
|
icp->icmp_cksum = 0;
|
|
icp->icmp_cksum = in_cksum(m, ip->ip_len - hlen);
|
|
m->m_data -= hlen;
|
|
m->m_len += hlen;
|
|
#ifdef ICMPPRINTFS
|
|
if (icmpprintfs) {
|
|
char buf[4 * sizeof "123"];
|
|
|
|
strcpy(buf, inet_ntoa(ip->ip_dst));
|
|
printf("icmp_send dst %s src %s\n",
|
|
buf, inet_ntoa(ip->ip_src));
|
|
}
|
|
#endif
|
|
(void) ip_output(m, opts, NULL, 0, NULL, NULL);
|
|
}
|
|
|
|
n_time
|
|
iptime()
|
|
{
|
|
struct timeval atv;
|
|
u_long t;
|
|
|
|
microtime(&atv);
|
|
t = (atv.tv_sec % (24*60*60)) * 1000 + atv.tv_usec / 1000;
|
|
return (htonl(t));
|
|
}
|
|
|
|
int
|
|
icmp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
|
|
int *name;
|
|
u_int namelen;
|
|
void *oldp;
|
|
size_t *oldlenp;
|
|
void *newp;
|
|
size_t newlen;
|
|
{
|
|
|
|
/* All sysctl names at this level are terminal. */
|
|
if (namelen != 1)
|
|
return (ENOTDIR);
|
|
|
|
switch (name[0]) {
|
|
case ICMPCTL_MASKREPL:
|
|
return (sysctl_int(oldp, oldlenp, newp, newlen, &icmpmaskrepl));
|
|
case ICMPCTL_BMCASTECHO:
|
|
return (sysctl_int(oldp, oldlenp, newp, newlen, &icmpbmcastecho));
|
|
default:
|
|
return (ENOPROTOOPT);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|