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1254 |
phoenix |
//==========================================================================
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//
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// sys/netinet/raw_ip.c
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//
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//
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD or other sources,
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// and are covered by the appropriate copyright disclaimers included herein.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2000-01-10
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// Purpose:
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// Description:
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//
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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/* $OpenBSD: raw_ip.c,v 1.19 1999/09/23 07:20:35 deraadt Exp $ */
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/* $NetBSD: raw_ip.c,v 1.25 1996/02/18 18:58:33 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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* @(#)raw_ip.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/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/socketvar.h>
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#include <sys/errno.h>
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#ifndef __ECOS
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#include <sys/systm.h>
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#endif
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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/ip.h>
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#include <netinet/ip_mroute.h>
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#include <netinet/ip_var.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_icmp.h>
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#ifdef IPSEC
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extern int check_ipsec_policy __P((struct inpcb *, u_int32_t));
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#endif
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#include <machine/stdarg.h>
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struct inpcbtable rawcbtable;
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/*
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* Nominal space allocated to a raw ip socket.
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*/
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#define RIPSNDQ 8192
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#define RIPRCVQ 8192
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/*
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* Raw interface to IP protocol.
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*/
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/*
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* Initialize raw connection block q.
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*/
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void
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rip_init()
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{
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in_pcbinit(&rawcbtable, 1);
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}
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struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
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/*
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* Setup generic address and protocol structures
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* for raw_input routine, then pass them along with
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* mbuf chain.
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*/
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void
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#if __STDC__
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rip_input(struct mbuf *m, ...)
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#else
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rip_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 ip *ip = mtod(m, struct ip *);
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register struct inpcb *inp;
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struct socket *last = 0;
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ripsrc.sin_addr = ip->ip_src;
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for (inp = rawcbtable.inpt_queue.cqh_first;
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inp != (struct inpcb *)&rawcbtable.inpt_queue;
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inp = inp->inp_queue.cqe_next) {
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if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != ip->ip_p)
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continue;
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if (inp->inp_laddr.s_addr &&
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inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
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continue;
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if (inp->inp_faddr.s_addr &&
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inp->inp_faddr.s_addr != ip->ip_src.s_addr)
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continue;
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if (last) {
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struct mbuf *n;
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if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
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if (sbappendaddr(&last->so_rcv,
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sintosa(&ripsrc), n,
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(struct mbuf *)0) == 0)
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/* should notify about lost packet */
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m_freem(n);
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else
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sorwakeup(last);
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}
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}
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last = inp->inp_socket;
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}
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if (last) {
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if (sbappendaddr(&last->so_rcv, sintosa(&ripsrc), m,
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(struct mbuf *)0) == 0)
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m_freem(m);
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else
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sorwakeup(last);
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} else {
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if (ip->ip_p != IPPROTO_ICMP)
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icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 0, 0);
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else
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m_freem(m);
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ipstat.ips_noproto++;
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ipstat.ips_delivered--;
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}
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}
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/*
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* Generate IP header and pass packet to ip_output.
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* Tack on options user may have setup with control call.
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*/
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int
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#if __STDC__
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rip_output(struct mbuf *m, ...)
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#else
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rip_output(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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struct socket *so;
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u_long dst;
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register struct ip *ip;
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register struct inpcb *inp;
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int flags;
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va_list ap;
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va_start(ap, m);
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so = va_arg(ap, struct socket *);
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dst = va_arg(ap, u_long);
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va_end(ap);
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inp = sotoinpcb(so);
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flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
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/*
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* If the user handed us a complete IP packet, use it.
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* Otherwise, allocate an mbuf for a header and fill it in.
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*/
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if ((inp->inp_flags & INP_HDRINCL) == 0) {
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if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
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m_freem(m);
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return (EMSGSIZE);
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}
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M_PREPEND(m, sizeof(struct ip), M_WAIT);
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ip = mtod(m, struct ip *);
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ip->ip_tos = 0;
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ip->ip_off = 0;
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ip->ip_p = inp->inp_ip.ip_p;
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ip->ip_len = m->m_pkthdr.len;
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ip->ip_src = inp->inp_laddr;
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ip->ip_dst.s_addr = dst;
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ip->ip_ttl = MAXTTL;
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} else {
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if (m->m_pkthdr.len > IP_MAXPACKET) {
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m_freem(m);
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| 245 |
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return (EMSGSIZE);
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| 246 |
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}
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| 247 |
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ip = mtod(m, struct ip *);
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| 248 |
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NTOHS(ip->ip_len);
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| 249 |
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NTOHS(ip->ip_off);
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| 250 |
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/*
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| 251 |
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* don't allow both user specified and setsockopt options,
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| 252 |
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* and don't allow packet length sizes that will crash
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| 253 |
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*/
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| 254 |
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if ((ip->ip_hl != (sizeof (*ip) >> 2) && inp->inp_options) ||
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| 255 |
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ip->ip_len > m->m_pkthdr.len ||
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| 256 |
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ip->ip_len < ip->ip_hl << 2) {
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| 257 |
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m_freem(m);
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| 258 |
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return (EINVAL);
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| 259 |
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}
|
| 260 |
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if (ip->ip_id == 0) {
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| 261 |
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#ifdef RANDOM_IP_ID
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| 262 |
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ip->ip_id = ip_randomid();
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| 263 |
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#else
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| 264 |
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ip->ip_id = htons(ip_id++);
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| 265 |
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#endif
|
| 266 |
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}
|
| 267 |
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/* XXX prevent ip_output from overwriting header fields */
|
| 268 |
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flags |= IP_RAWOUTPUT;
|
| 269 |
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ipstat.ips_rawout++;
|
| 270 |
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}
|
| 271 |
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#ifdef INET6
|
| 272 |
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/*
|
| 273 |
|
|
* A thought: Even though raw IP shouldn't be able to set IPv6
|
| 274 |
|
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* multicast options, if it does, the last parameter to
|
| 275 |
|
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* ip_output should be guarded against v6/v4 problems.
|
| 276 |
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*/
|
| 277 |
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#endif
|
| 278 |
|
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return (ip_output(m, inp->inp_options, &inp->inp_route, flags,
|
| 279 |
|
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inp->inp_moptions, inp));
|
| 280 |
|
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}
|
| 281 |
|
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|
| 282 |
|
|
/*
|
| 283 |
|
|
* Raw IP socket option processing.
|
| 284 |
|
|
*/
|
| 285 |
|
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int
|
| 286 |
|
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rip_ctloutput(op, so, level, optname, m)
|
| 287 |
|
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int op;
|
| 288 |
|
|
struct socket *so;
|
| 289 |
|
|
int level, optname;
|
| 290 |
|
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struct mbuf **m;
|
| 291 |
|
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{
|
| 292 |
|
|
register struct inpcb *inp = sotoinpcb(so);
|
| 293 |
|
|
register int error;
|
| 294 |
|
|
|
| 295 |
|
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if (level != IPPROTO_IP) {
|
| 296 |
|
|
if (op == PRCO_SETOPT && *m)
|
| 297 |
|
|
(void) m_free(*m);
|
| 298 |
|
|
return (EINVAL);
|
| 299 |
|
|
}
|
| 300 |
|
|
|
| 301 |
|
|
switch (optname) {
|
| 302 |
|
|
|
| 303 |
|
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case IP_HDRINCL:
|
| 304 |
|
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error = 0;
|
| 305 |
|
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if (op == PRCO_SETOPT) {
|
| 306 |
|
|
if (*m == 0 || (*m)->m_len < sizeof (int))
|
| 307 |
|
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error = EINVAL;
|
| 308 |
|
|
else if (*mtod(*m, int *))
|
| 309 |
|
|
inp->inp_flags |= INP_HDRINCL;
|
| 310 |
|
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else
|
| 311 |
|
|
inp->inp_flags &= ~INP_HDRINCL;
|
| 312 |
|
|
if (*m)
|
| 313 |
|
|
(void)m_free(*m);
|
| 314 |
|
|
} else {
|
| 315 |
|
|
*m = m_get(M_WAIT, M_SOOPTS);
|
| 316 |
|
|
(*m)->m_len = sizeof(int);
|
| 317 |
|
|
*mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
|
| 318 |
|
|
}
|
| 319 |
|
|
return (error);
|
| 320 |
|
|
|
| 321 |
|
|
case MRT_INIT:
|
| 322 |
|
|
case MRT_DONE:
|
| 323 |
|
|
case MRT_ADD_VIF:
|
| 324 |
|
|
case MRT_DEL_VIF:
|
| 325 |
|
|
case MRT_ADD_MFC:
|
| 326 |
|
|
case MRT_DEL_MFC:
|
| 327 |
|
|
case MRT_VERSION:
|
| 328 |
|
|
case MRT_ASSERT:
|
| 329 |
|
|
#ifdef MROUTING
|
| 330 |
|
|
switch (op) {
|
| 331 |
|
|
case PRCO_SETOPT:
|
| 332 |
|
|
error = ip_mrouter_set(optname, so, m);
|
| 333 |
|
|
break;
|
| 334 |
|
|
case PRCO_GETOPT:
|
| 335 |
|
|
error = ip_mrouter_get(optname, so, m);
|
| 336 |
|
|
break;
|
| 337 |
|
|
default:
|
| 338 |
|
|
error = EINVAL;
|
| 339 |
|
|
break;
|
| 340 |
|
|
}
|
| 341 |
|
|
return (error);
|
| 342 |
|
|
#else
|
| 343 |
|
|
if (op == PRCO_SETOPT && *m)
|
| 344 |
|
|
m_free(*m);
|
| 345 |
|
|
return (EOPNOTSUPP);
|
| 346 |
|
|
#endif
|
| 347 |
|
|
}
|
| 348 |
|
|
return (ip_ctloutput(op, so, level, optname, m));
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
u_long rip_sendspace = RIPSNDQ;
|
| 352 |
|
|
u_long rip_recvspace = RIPRCVQ;
|
| 353 |
|
|
|
| 354 |
|
|
/*ARGSUSED*/
|
| 355 |
|
|
int
|
| 356 |
|
|
rip_usrreq(so, req, m, nam, control)
|
| 357 |
|
|
register struct socket *so;
|
| 358 |
|
|
int req;
|
| 359 |
|
|
struct mbuf *m, *nam, *control;
|
| 360 |
|
|
{
|
| 361 |
|
|
register int error = 0;
|
| 362 |
|
|
register struct inpcb *inp = sotoinpcb(so);
|
| 363 |
|
|
#ifdef MROUTING
|
| 364 |
|
|
extern struct socket *ip_mrouter;
|
| 365 |
|
|
#endif
|
| 366 |
|
|
if (req == PRU_CONTROL)
|
| 367 |
|
|
return (in_control(so, (u_long)m, (caddr_t)nam,
|
| 368 |
|
|
(struct ifnet *)control));
|
| 369 |
|
|
|
| 370 |
|
|
if (inp == NULL && req != PRU_ATTACH) {
|
| 371 |
|
|
error = EINVAL;
|
| 372 |
|
|
goto release;
|
| 373 |
|
|
}
|
| 374 |
|
|
|
| 375 |
|
|
switch (req) {
|
| 376 |
|
|
|
| 377 |
|
|
case PRU_ATTACH:
|
| 378 |
|
|
if (inp)
|
| 379 |
|
|
panic("rip_attach");
|
| 380 |
|
|
#ifndef __ECOS
|
| 381 |
|
|
if ((so->so_state & SS_PRIV) == 0) {
|
| 382 |
|
|
error = EACCES;
|
| 383 |
|
|
break;
|
| 384 |
|
|
}
|
| 385 |
|
|
#endif
|
| 386 |
|
|
if ((error = soreserve(so, rip_sendspace, rip_recvspace)) ||
|
| 387 |
|
|
(error = in_pcballoc(so, &rawcbtable)))
|
| 388 |
|
|
break;
|
| 389 |
|
|
inp = (struct inpcb *)so->so_pcb;
|
| 390 |
|
|
inp->inp_ip.ip_p = (long)nam;
|
| 391 |
|
|
break;
|
| 392 |
|
|
|
| 393 |
|
|
case PRU_DISCONNECT:
|
| 394 |
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
| 395 |
|
|
error = ENOTCONN;
|
| 396 |
|
|
break;
|
| 397 |
|
|
}
|
| 398 |
|
|
/* FALLTHROUGH */
|
| 399 |
|
|
case PRU_ABORT:
|
| 400 |
|
|
soisdisconnected(so);
|
| 401 |
|
|
/* FALLTHROUGH */
|
| 402 |
|
|
case PRU_DETACH:
|
| 403 |
|
|
if (inp == 0)
|
| 404 |
|
|
panic("rip_detach");
|
| 405 |
|
|
#ifdef MROUTING
|
| 406 |
|
|
if (so == ip_mrouter)
|
| 407 |
|
|
ip_mrouter_done();
|
| 408 |
|
|
#endif
|
| 409 |
|
|
in_pcbdetach(inp);
|
| 410 |
|
|
break;
|
| 411 |
|
|
|
| 412 |
|
|
case PRU_BIND:
|
| 413 |
|
|
{
|
| 414 |
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
| 415 |
|
|
|
| 416 |
|
|
if (nam->m_len != sizeof(*addr)) {
|
| 417 |
|
|
error = EINVAL;
|
| 418 |
|
|
break;
|
| 419 |
|
|
}
|
| 420 |
|
|
if ((ifnet.tqh_first == 0) ||
|
| 421 |
|
|
((addr->sin_family != AF_INET) &&
|
| 422 |
|
|
(addr->sin_family != AF_IMPLINK)) ||
|
| 423 |
|
|
(addr->sin_addr.s_addr &&
|
| 424 |
|
|
ifa_ifwithaddr(sintosa(addr)) == 0)) {
|
| 425 |
|
|
error = EADDRNOTAVAIL;
|
| 426 |
|
|
break;
|
| 427 |
|
|
}
|
| 428 |
|
|
inp->inp_laddr = addr->sin_addr;
|
| 429 |
|
|
break;
|
| 430 |
|
|
}
|
| 431 |
|
|
case PRU_CONNECT:
|
| 432 |
|
|
{
|
| 433 |
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
| 434 |
|
|
|
| 435 |
|
|
if (nam->m_len != sizeof(*addr)) {
|
| 436 |
|
|
error = EINVAL;
|
| 437 |
|
|
break;
|
| 438 |
|
|
}
|
| 439 |
|
|
if (ifnet.tqh_first == 0) {
|
| 440 |
|
|
error = EADDRNOTAVAIL;
|
| 441 |
|
|
break;
|
| 442 |
|
|
}
|
| 443 |
|
|
if ((addr->sin_family != AF_INET) &&
|
| 444 |
|
|
(addr->sin_family != AF_IMPLINK)) {
|
| 445 |
|
|
error = EAFNOSUPPORT;
|
| 446 |
|
|
break;
|
| 447 |
|
|
}
|
| 448 |
|
|
inp->inp_faddr = addr->sin_addr;
|
| 449 |
|
|
soisconnected(so);
|
| 450 |
|
|
break;
|
| 451 |
|
|
}
|
| 452 |
|
|
|
| 453 |
|
|
case PRU_CONNECT2:
|
| 454 |
|
|
error = EOPNOTSUPP;
|
| 455 |
|
|
break;
|
| 456 |
|
|
|
| 457 |
|
|
/*
|
| 458 |
|
|
* Mark the connection as being incapable of further input.
|
| 459 |
|
|
*/
|
| 460 |
|
|
case PRU_SHUTDOWN:
|
| 461 |
|
|
socantsendmore(so);
|
| 462 |
|
|
break;
|
| 463 |
|
|
|
| 464 |
|
|
/*
|
| 465 |
|
|
* Ship a packet out. The appropriate raw output
|
| 466 |
|
|
* routine handles any massaging necessary.
|
| 467 |
|
|
*/
|
| 468 |
|
|
case PRU_SEND:
|
| 469 |
|
|
{
|
| 470 |
|
|
register u_int32_t dst;
|
| 471 |
|
|
|
| 472 |
|
|
if (so->so_state & SS_ISCONNECTED) {
|
| 473 |
|
|
if (nam) {
|
| 474 |
|
|
error = EISCONN;
|
| 475 |
|
|
break;
|
| 476 |
|
|
}
|
| 477 |
|
|
dst = inp->inp_faddr.s_addr;
|
| 478 |
|
|
} else {
|
| 479 |
|
|
if (nam == NULL) {
|
| 480 |
|
|
error = ENOTCONN;
|
| 481 |
|
|
break;
|
| 482 |
|
|
}
|
| 483 |
|
|
dst = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
|
| 484 |
|
|
}
|
| 485 |
|
|
#ifdef IPSEC
|
| 486 |
|
|
if (!(error = check_ipsec_policy(inp, dst)))
|
| 487 |
|
|
#endif
|
| 488 |
|
|
error = rip_output(m, so, dst);
|
| 489 |
|
|
m = NULL;
|
| 490 |
|
|
break;
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
case PRU_SENSE:
|
| 494 |
|
|
/*
|
| 495 |
|
|
* stat: don't bother with a blocksize.
|
| 496 |
|
|
*/
|
| 497 |
|
|
return (0);
|
| 498 |
|
|
|
| 499 |
|
|
/*
|
| 500 |
|
|
* Not supported.
|
| 501 |
|
|
*/
|
| 502 |
|
|
case PRU_RCVOOB:
|
| 503 |
|
|
case PRU_RCVD:
|
| 504 |
|
|
case PRU_LISTEN:
|
| 505 |
|
|
case PRU_ACCEPT:
|
| 506 |
|
|
case PRU_SENDOOB:
|
| 507 |
|
|
error = EOPNOTSUPP;
|
| 508 |
|
|
break;
|
| 509 |
|
|
|
| 510 |
|
|
case PRU_SOCKADDR:
|
| 511 |
|
|
in_setsockaddr(inp, nam);
|
| 512 |
|
|
break;
|
| 513 |
|
|
|
| 514 |
|
|
case PRU_PEERADDR:
|
| 515 |
|
|
in_setpeeraddr(inp, nam);
|
| 516 |
|
|
break;
|
| 517 |
|
|
|
| 518 |
|
|
default:
|
| 519 |
|
|
panic("rip_usrreq");
|
| 520 |
|
|
}
|
| 521 |
|
|
release:
|
| 522 |
|
|
if (m != NULL)
|
| 523 |
|
|
m_freem(m);
|
| 524 |
|
|
return (error);
|
| 525 |
|
|
}
|
