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158 |
chris |
/*
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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 8.7 (Berkeley) 5/15/95
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208 |
chris |
* $Id: raw_ip.c,v 1.2 2001-09-27 12:01:56 chris Exp $
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158 |
chris |
*/
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| 36 |
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#include <sys/param.h>
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| 38 |
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#include <sys/queue.h>
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| 39 |
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#include <sys/malloc.h>
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| 40 |
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#include <sys/mbuf.h>
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| 41 |
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#include <sys/socket.h>
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#include <sys/protosw.h>
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| 43 |
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#include <sys/socketvar.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/route.h>
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| 49 |
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| 50 |
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#define _IP_VHL
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| 51 |
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#include <netinet/in.h>
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| 52 |
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#include <netinet/in_systm.h>
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| 53 |
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#include <netinet/ip.h>
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| 54 |
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#include <netinet/in_pcb.h>
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| 55 |
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#include <netinet/in_var.h>
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| 56 |
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#include <netinet/ip_var.h>
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| 57 |
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#include <netinet/ip_mroute.h>
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#include <netinet/ip_fw.h>
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| 61 |
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#if !defined(COMPAT_IPFW) || COMPAT_IPFW == 1
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#undef COMPAT_IPFW
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#define COMPAT_IPFW 1
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#else
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#undef COMPAT_IPFW
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#endif
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| 68 |
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static struct inpcbhead ripcb;
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static struct inpcbinfo ripcbinfo;
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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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| 81 |
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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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| 87 |
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LIST_INIT(&ripcb);
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| 88 |
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ripcbinfo.listhead = &ripcb;
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| 89 |
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/*
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| 90 |
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* XXX We don't use the hash list for raw IP, but it's easier
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* to allocate a one entry hash list than it is to check all
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* over the place for hashbase == NULL.
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*/
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ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
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}
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| 97 |
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static 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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| 104 |
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rip_input(m, iphlen)
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| 105 |
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struct mbuf *m;
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| 106 |
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int iphlen;
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| 107 |
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{
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| 108 |
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register struct ip *ip = mtod(m, struct ip *);
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| 109 |
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register struct inpcb *inp;
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| 110 |
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struct inpcb *last = 0;
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| 111 |
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struct mbuf *opts = 0;
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| 112 |
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ripsrc.sin_addr = ip->ip_src;
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for (inp = ripcb.lh_first; inp != NULL; inp = inp->inp_list.le_next) {
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if (inp->inp_ip_p && inp->inp_ip_p != ip->ip_p)
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continue;
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| 117 |
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if (inp->inp_laddr.s_addr &&
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| 118 |
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inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
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| 119 |
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continue;
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| 120 |
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if (inp->inp_faddr.s_addr &&
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| 121 |
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inp->inp_faddr.s_addr != ip->ip_src.s_addr)
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continue;
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| 123 |
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if (last) {
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struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
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if (n) {
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if (last->inp_flags & INP_CONTROLOPTS ||
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last->inp_socket->so_options & SO_TIMESTAMP)
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| 128 |
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ip_savecontrol(last, &opts, ip, n);
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| 129 |
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if (sbappendaddr(&last->inp_socket->so_rcv,
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| 130 |
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(struct sockaddr *)&ripsrc, n,
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| 131 |
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opts) == 0) {
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| 132 |
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/* should notify about lost packet */
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| 133 |
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m_freem(n);
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| 134 |
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if (opts)
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| 135 |
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m_freem(opts);
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| 136 |
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} else
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| 137 |
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sorwakeup(last->inp_socket);
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| 138 |
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opts = 0;
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| 139 |
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}
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| 140 |
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}
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| 141 |
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last = inp;
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}
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if (last) {
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if (last->inp_flags & INP_CONTROLOPTS ||
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last->inp_socket->so_options & SO_TIMESTAMP)
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ip_savecontrol(last, &opts, ip, m);
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| 147 |
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if (sbappendaddr(&last->inp_socket->so_rcv,
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| 148 |
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(struct sockaddr *)&ripsrc, m, opts) == 0) {
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| 149 |
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m_freem(m);
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| 150 |
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if (opts)
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| 151 |
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m_freem(opts);
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| 152 |
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} else
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| 153 |
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sorwakeup(last->inp_socket);
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| 154 |
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} else {
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m_freem(m);
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ipstat.ips_noproto++;
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| 157 |
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ipstat.ips_delivered--;
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| 158 |
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}
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| 159 |
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}
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| 160 |
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| 161 |
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/*
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| 162 |
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* Generate IP header and pass packet to ip_output.
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| 163 |
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* Tack on options user may have setup with control call.
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*/
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| 165 |
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int
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| 166 |
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rip_output(m, so, dst)
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| 167 |
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register struct mbuf *m;
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| 168 |
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struct socket *so;
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| 169 |
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u_long dst;
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| 170 |
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{
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| 171 |
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register struct ip *ip;
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| 172 |
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register struct inpcb *inp = sotoinpcb(so);
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| 173 |
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int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
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| 174 |
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| 175 |
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/*
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| 176 |
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* If the user handed us a complete IP packet, use it.
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| 177 |
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* Otherwise, allocate an mbuf for a header and fill it in.
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| 178 |
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*/
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| 179 |
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if ((inp->inp_flags & INP_HDRINCL) == 0) {
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| 180 |
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if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
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| 181 |
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m_freem(m);
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| 182 |
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return(EMSGSIZE);
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| 183 |
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}
|
| 184 |
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M_PREPEND(m, sizeof(struct ip), M_WAIT);
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| 185 |
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ip = mtod(m, struct ip *);
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| 186 |
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ip->ip_tos = 0;
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| 187 |
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ip->ip_off = 0;
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| 188 |
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ip->ip_p = inp->inp_ip_p;
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| 189 |
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ip->ip_len = m->m_pkthdr.len;
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| 190 |
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ip->ip_src = inp->inp_laddr;
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| 191 |
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ip->ip_dst.s_addr = dst;
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| 192 |
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ip->ip_ttl = MAXTTL;
|
| 193 |
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} else {
|
| 194 |
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if (m->m_pkthdr.len > IP_MAXPACKET) {
|
| 195 |
|
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m_freem(m);
|
| 196 |
|
|
return(EMSGSIZE);
|
| 197 |
|
|
}
|
| 198 |
|
|
ip = mtod(m, struct ip *);
|
| 199 |
|
|
/* don't allow both user specified and setsockopt options,
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| 200 |
|
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and don't allow packet length sizes that will crash */
|
| 201 |
|
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if (((IP_VHL_HL(ip->ip_vhl) != (sizeof (*ip) >> 2))
|
| 202 |
|
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&& inp->inp_options)
|
| 203 |
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|| (ip->ip_len > m->m_pkthdr.len)
|
| 204 |
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|| (ip->ip_len < (IP_VHL_HL(ip->ip_vhl) << 2))) {
|
| 205 |
|
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m_freem(m);
|
| 206 |
|
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return EINVAL;
|
| 207 |
|
|
}
|
| 208 |
|
|
if (ip->ip_id == 0)
|
| 209 |
|
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ip->ip_id = htons(ip_id++);
|
| 210 |
|
|
/* XXX prevent ip_output from overwriting header fields */
|
| 211 |
|
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flags |= IP_RAWOUTPUT;
|
| 212 |
|
|
ipstat.ips_rawout++;
|
| 213 |
|
|
}
|
| 214 |
|
|
return (ip_output(m, inp->inp_options, &inp->inp_route, flags,
|
| 215 |
|
|
inp->inp_moptions));
|
| 216 |
|
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}
|
| 217 |
|
|
|
| 218 |
|
|
/*
|
| 219 |
|
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* Raw IP socket option processing.
|
| 220 |
|
|
*/
|
| 221 |
|
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int
|
| 222 |
|
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rip_ctloutput(op, so, level, optname, m)
|
| 223 |
|
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int op;
|
| 224 |
|
|
struct socket *so;
|
| 225 |
|
|
int level, optname;
|
| 226 |
|
|
struct mbuf **m;
|
| 227 |
|
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{
|
| 228 |
|
|
register struct inpcb *inp = sotoinpcb(so);
|
| 229 |
|
|
register int error;
|
| 230 |
|
|
|
| 231 |
|
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if (level != IPPROTO_IP) {
|
| 232 |
|
|
if (op == PRCO_SETOPT && *m)
|
| 233 |
|
|
(void)m_free(*m);
|
| 234 |
|
|
return (EINVAL);
|
| 235 |
|
|
}
|
| 236 |
|
|
|
| 237 |
|
|
switch (optname) {
|
| 238 |
|
|
|
| 239 |
|
|
case IP_HDRINCL:
|
| 240 |
|
|
error = 0;
|
| 241 |
|
|
if (op == PRCO_SETOPT) {
|
| 242 |
|
|
if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int))
|
| 243 |
|
|
error = EINVAL;
|
| 244 |
|
|
else if (*mtod(*m, int *))
|
| 245 |
|
|
inp->inp_flags |= INP_HDRINCL;
|
| 246 |
|
|
else
|
| 247 |
|
|
inp->inp_flags &= ~INP_HDRINCL;
|
| 248 |
|
|
if (*m)
|
| 249 |
|
|
(void)m_free(*m);
|
| 250 |
|
|
} else {
|
| 251 |
|
|
*m = m_get(M_WAIT, MT_SOOPTS);
|
| 252 |
|
|
(*m)->m_len = sizeof (int);
|
| 253 |
|
|
*mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
|
| 254 |
|
|
}
|
| 255 |
|
|
return (error);
|
| 256 |
|
|
|
| 257 |
|
|
#ifdef COMPAT_IPFW
|
| 258 |
|
|
case IP_FW_GET:
|
| 259 |
|
|
if (ip_fw_ctl_ptr == NULL || op == PRCO_SETOPT) {
|
| 260 |
|
|
if (*m) (void)m_free(*m);
|
| 261 |
|
|
return(EINVAL);
|
| 262 |
|
|
}
|
| 263 |
|
|
return (*ip_fw_ctl_ptr)(optname, m);
|
| 264 |
|
|
|
| 265 |
|
|
case IP_FW_ADD:
|
| 266 |
|
|
case IP_FW_DEL:
|
| 267 |
|
|
case IP_FW_FLUSH:
|
| 268 |
|
|
case IP_FW_ZERO:
|
| 269 |
|
|
if (ip_fw_ctl_ptr == NULL || op != PRCO_SETOPT) {
|
| 270 |
|
|
if (*m) (void)m_free(*m);
|
| 271 |
|
|
return(EINVAL);
|
| 272 |
|
|
}
|
| 273 |
|
|
return (*ip_fw_ctl_ptr)(optname, m);
|
| 274 |
|
|
|
| 275 |
|
|
case IP_NAT:
|
| 276 |
|
|
if (ip_nat_ctl_ptr == NULL) {
|
| 277 |
|
|
if (*m) (void)m_free(*m);
|
| 278 |
|
|
return(EINVAL);
|
| 279 |
|
|
}
|
| 280 |
|
|
return (*ip_nat_ctl_ptr)(op, m);
|
| 281 |
|
|
|
| 282 |
|
|
#endif
|
| 283 |
|
|
case IP_RSVP_ON:
|
| 284 |
|
|
return ip_rsvp_init(so);
|
| 285 |
|
|
break;
|
| 286 |
|
|
|
| 287 |
|
|
case IP_RSVP_OFF:
|
| 288 |
|
|
return ip_rsvp_done();
|
| 289 |
|
|
break;
|
| 290 |
|
|
|
| 291 |
|
|
case IP_RSVP_VIF_ON:
|
| 292 |
|
|
return ip_rsvp_vif_init(so, *m);
|
| 293 |
|
|
|
| 294 |
|
|
case IP_RSVP_VIF_OFF:
|
| 295 |
|
|
return ip_rsvp_vif_done(so, *m);
|
| 296 |
|
|
|
| 297 |
|
|
case MRT_INIT:
|
| 298 |
|
|
case MRT_DONE:
|
| 299 |
|
|
case MRT_ADD_VIF:
|
| 300 |
|
|
case MRT_DEL_VIF:
|
| 301 |
|
|
case MRT_ADD_MFC:
|
| 302 |
|
|
case MRT_DEL_MFC:
|
| 303 |
|
|
case MRT_VERSION:
|
| 304 |
|
|
case MRT_ASSERT:
|
| 305 |
|
|
if (op == PRCO_SETOPT) {
|
| 306 |
|
|
error = ip_mrouter_set(optname, so, *m);
|
| 307 |
|
|
if (*m)
|
| 308 |
|
|
(void)m_free(*m);
|
| 309 |
|
|
} else if (op == PRCO_GETOPT) {
|
| 310 |
|
|
error = ip_mrouter_get(optname, so, m);
|
| 311 |
|
|
} else
|
| 312 |
|
|
error = EINVAL;
|
| 313 |
|
|
return (error);
|
| 314 |
|
|
}
|
| 315 |
|
|
return (ip_ctloutput(op, so, level, optname, m));
|
| 316 |
|
|
}
|
| 317 |
|
|
|
| 318 |
|
|
static u_long rip_sendspace = RIPSNDQ; /* XXX sysctl ? */
|
| 319 |
|
|
static u_long rip_recvspace = RIPRCVQ; /* XXX sysctl ? */
|
| 320 |
|
|
|
| 321 |
|
|
/*ARGSUSED*/
|
| 322 |
|
|
int
|
| 323 |
|
|
rip_usrreq(so, req, m, nam, control)
|
| 324 |
|
|
register struct socket *so;
|
| 325 |
|
|
int req;
|
| 326 |
|
|
struct mbuf *m, *nam, *control;
|
| 327 |
|
|
{
|
| 328 |
|
|
register int error = 0;
|
| 329 |
|
|
register struct inpcb *inp = sotoinpcb(so);
|
| 330 |
|
|
int s;
|
| 331 |
|
|
|
| 332 |
|
|
if (req == PRU_CONTROL)
|
| 333 |
|
|
return (in_control(so, (u_long)m, (caddr_t)nam,
|
| 334 |
|
|
(struct ifnet *)control));
|
| 335 |
|
|
|
| 336 |
|
|
switch (req) {
|
| 337 |
|
|
|
| 338 |
|
|
case PRU_ATTACH:
|
| 339 |
|
|
if (inp)
|
| 340 |
|
|
panic("rip_attach");
|
| 341 |
|
|
if ((so->so_state & SS_PRIV) == 0) {
|
| 342 |
|
|
error = EACCES;
|
| 343 |
|
|
break;
|
| 344 |
|
|
}
|
| 345 |
|
|
s = splnet();
|
| 346 |
|
|
error = in_pcballoc(so, &ripcbinfo);
|
| 347 |
|
|
splx(s);
|
| 348 |
|
|
if (error)
|
| 349 |
|
|
break;
|
| 350 |
|
|
error = soreserve(so, rip_sendspace, rip_recvspace);
|
| 351 |
|
|
if (error)
|
| 352 |
|
|
break;
|
| 353 |
|
|
inp = (struct inpcb *)so->so_pcb;
|
| 354 |
|
|
inp->inp_ip_p = (int)nam;
|
| 355 |
|
|
break;
|
| 356 |
|
|
|
| 357 |
|
|
case PRU_DISCONNECT:
|
| 358 |
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
| 359 |
|
|
error = ENOTCONN;
|
| 360 |
|
|
break;
|
| 361 |
|
|
}
|
| 362 |
|
|
/* FALLTHROUGH */
|
| 363 |
|
|
case PRU_ABORT:
|
| 364 |
|
|
soisdisconnected(so);
|
| 365 |
|
|
/* FALLTHROUGH */
|
| 366 |
|
|
case PRU_DETACH:
|
| 367 |
|
|
if (inp == 0)
|
| 368 |
|
|
panic("rip_detach");
|
| 369 |
|
|
if (so == ip_mrouter)
|
| 370 |
|
|
ip_mrouter_done();
|
| 371 |
|
|
ip_rsvp_force_done(so);
|
| 372 |
|
|
if (so == ip_rsvpd)
|
| 373 |
|
|
ip_rsvp_done();
|
| 374 |
|
|
in_pcbdetach(inp);
|
| 375 |
|
|
break;
|
| 376 |
|
|
|
| 377 |
|
|
case PRU_BIND:
|
| 378 |
|
|
{
|
| 379 |
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
| 380 |
|
|
|
| 381 |
|
|
if (nam->m_len != sizeof(*addr)) {
|
| 382 |
|
|
error = EINVAL;
|
| 383 |
|
|
break;
|
| 384 |
|
|
}
|
| 385 |
|
|
if ((ifnet == 0) ||
|
| 386 |
|
|
((addr->sin_family != AF_INET) &&
|
| 387 |
|
|
(addr->sin_family != AF_IMPLINK)) ||
|
| 388 |
|
|
(addr->sin_addr.s_addr &&
|
| 389 |
|
|
ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
|
| 390 |
|
|
error = EADDRNOTAVAIL;
|
| 391 |
|
|
break;
|
| 392 |
|
|
}
|
| 393 |
|
|
inp->inp_laddr = addr->sin_addr;
|
| 394 |
|
|
break;
|
| 395 |
|
|
}
|
| 396 |
|
|
case PRU_CONNECT:
|
| 397 |
|
|
{
|
| 398 |
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
| 399 |
|
|
|
| 400 |
|
|
if (nam->m_len != sizeof(*addr)) {
|
| 401 |
|
|
error = EINVAL;
|
| 402 |
|
|
break;
|
| 403 |
|
|
}
|
| 404 |
|
|
if (ifnet == 0) {
|
| 405 |
|
|
error = EADDRNOTAVAIL;
|
| 406 |
|
|
break;
|
| 407 |
|
|
}
|
| 408 |
|
|
if ((addr->sin_family != AF_INET) &&
|
| 409 |
|
|
(addr->sin_family != AF_IMPLINK)) {
|
| 410 |
|
|
error = EAFNOSUPPORT;
|
| 411 |
|
|
break;
|
| 412 |
|
|
}
|
| 413 |
|
|
inp->inp_faddr = addr->sin_addr;
|
| 414 |
|
|
soisconnected(so);
|
| 415 |
|
|
break;
|
| 416 |
|
|
}
|
| 417 |
|
|
|
| 418 |
|
|
case PRU_CONNECT2:
|
| 419 |
|
|
error = EOPNOTSUPP;
|
| 420 |
|
|
break;
|
| 421 |
|
|
|
| 422 |
|
|
/*
|
| 423 |
|
|
* Mark the connection as being incapable of further input.
|
| 424 |
|
|
*/
|
| 425 |
|
|
case PRU_SHUTDOWN:
|
| 426 |
|
|
socantsendmore(so);
|
| 427 |
|
|
break;
|
| 428 |
|
|
|
| 429 |
|
|
/*
|
| 430 |
|
|
* Ship a packet out. The appropriate raw output
|
| 431 |
|
|
* routine handles any massaging necessary.
|
| 432 |
|
|
*/
|
| 433 |
|
|
case PRU_SEND:
|
| 434 |
|
|
{
|
| 435 |
|
|
register u_long dst;
|
| 436 |
|
|
|
| 437 |
|
|
if (so->so_state & SS_ISCONNECTED) {
|
| 438 |
|
|
if (nam) {
|
| 439 |
|
|
error = EISCONN;
|
| 440 |
|
|
break;
|
| 441 |
|
|
}
|
| 442 |
|
|
dst = inp->inp_faddr.s_addr;
|
| 443 |
|
|
} else {
|
| 444 |
|
|
if (nam == NULL) {
|
| 445 |
|
|
error = ENOTCONN;
|
| 446 |
|
|
break;
|
| 447 |
|
|
}
|
| 448 |
|
|
dst = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
|
| 449 |
|
|
}
|
| 450 |
|
|
error = rip_output(m, so, dst);
|
| 451 |
|
|
m = NULL;
|
| 452 |
|
|
break;
|
| 453 |
|
|
}
|
| 454 |
|
|
|
| 455 |
|
|
case PRU_SENSE:
|
| 456 |
|
|
/*
|
| 457 |
|
|
* stat: don't bother with a blocksize.
|
| 458 |
|
|
*/
|
| 459 |
|
|
return (0);
|
| 460 |
|
|
|
| 461 |
|
|
/*
|
| 462 |
|
|
* Not supported.
|
| 463 |
|
|
*/
|
| 464 |
|
|
case PRU_RCVOOB:
|
| 465 |
|
|
case PRU_RCVD:
|
| 466 |
|
|
case PRU_LISTEN:
|
| 467 |
|
|
case PRU_ACCEPT:
|
| 468 |
|
|
case PRU_SENDOOB:
|
| 469 |
|
|
error = EOPNOTSUPP;
|
| 470 |
|
|
break;
|
| 471 |
|
|
|
| 472 |
|
|
case PRU_SOCKADDR:
|
| 473 |
|
|
in_setsockaddr(inp, nam);
|
| 474 |
|
|
break;
|
| 475 |
|
|
|
| 476 |
|
|
case PRU_PEERADDR:
|
| 477 |
|
|
in_setpeeraddr(inp, nam);
|
| 478 |
|
|
break;
|
| 479 |
|
|
|
| 480 |
|
|
default:
|
| 481 |
|
|
panic("rip_usrreq");
|
| 482 |
|
|
}
|
| 483 |
|
|
if (m != NULL)
|
| 484 |
|
|
m_freem(m);
|
| 485 |
|
|
return (error);
|
| 486 |
|
|
}
|
