1994-05-24 10:09:53 +00:00
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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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1995-01-12 10:53:25 +00:00
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* $Id: raw_ip.c,v 1.10 1994/12/13 15:57:34 ugen Exp $
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1994-05-24 10:09:53 +00:00
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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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#include <sys/systm.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/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_mroute.h>
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#include <netinet/in_pcb.h>
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1994-10-28 15:09:49 +00:00
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#ifdef IPFIREWALL
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#include <netinet/ip_fw.h>
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#endif
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1994-11-16 10:17:11 +00:00
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#ifdef IPACCT
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#include <netinet/ip_fw.h>
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#endif
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1994-10-28 15:09:49 +00:00
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1994-05-24 10:09:53 +00:00
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struct inpcb rawinpcb;
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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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rawinpcb.inp_next = rawinpcb.inp_prev = &rawinpcb;
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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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rip_input(m)
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struct mbuf *m;
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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 = rawinpcb.inp_next; inp != &rawinpcb; inp = inp->inp_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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1994-10-02 17:48:58 +00:00
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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 (sbappendaddr(&last->so_rcv,
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(struct sockaddr *)&ripsrc, n,
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(struct mbuf *)0) == 0)
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1994-05-24 10:09:53 +00:00
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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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1994-10-02 17:48:58 +00:00
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if (sbappendaddr(&last->so_rcv, (struct sockaddr *)&ripsrc,
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1994-05-24 10:09:53 +00:00
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m, (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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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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rip_output(m, so, dst)
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register struct mbuf *m;
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struct socket *so;
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u_long dst;
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{
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register struct ip *ip;
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register struct inpcb *inp = sotoinpcb(so);
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struct mbuf *opts;
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int 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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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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opts = inp->inp_options;
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} else {
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ip = mtod(m, struct ip *);
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if (ip->ip_id == 0)
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ip->ip_id = htons(ip_id++);
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opts = NULL;
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/* XXX prevent ip_output from overwriting header fields */
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flags |= IP_RAWOUTPUT;
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ipstat.ips_rawout++;
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}
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return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions));
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}
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/*
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* Raw IP socket option processing.
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*/
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int
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rip_ctloutput(op, so, level, optname, m)
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int op;
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struct socket *so;
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int level, optname;
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struct mbuf **m;
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{
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register struct inpcb *inp = sotoinpcb(so);
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register int error;
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1995-01-12 10:53:25 +00:00
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if (level != IPPROTO_IP) {
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if (op == PRCO_SETOPT && *m)
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(void)m_free(*m);
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1994-05-24 10:09:53 +00:00
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return (EINVAL);
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1995-01-12 10:53:25 +00:00
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}
|
1994-05-24 10:09:53 +00:00
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switch (optname) {
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case IP_HDRINCL:
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if (op == PRCO_SETOPT || op == PRCO_GETOPT) {
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if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int))
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return (EINVAL);
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if (op == PRCO_SETOPT) {
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if (*mtod(*m, int *))
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inp->inp_flags |= INP_HDRINCL;
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else
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inp->inp_flags &= ~INP_HDRINCL;
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(void)m_free(*m);
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} else {
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(*m)->m_len = sizeof (int);
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*mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
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}
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return (0);
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}
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break;
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1994-10-28 15:09:49 +00:00
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#ifdef IPFIREWALL
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case IP_FW_ADD_BLK:
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case IP_FW_ADD_FWD:
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case IP_FW_DEL_BLK:
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case IP_FW_DEL_FWD:
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case IP_FW_FLUSH:
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case IP_FW_POLICY:
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|
1994-11-07 10:01:32 +00:00
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if (op == PRCO_SETOPT) {
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error=ip_fw_ctl(optname, *m);
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if (*m)
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(void)m_free(*m);
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}
|
1994-10-28 15:09:49 +00:00
|
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else
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error=EINVAL;
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return(error);
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#endif
|
1994-11-16 10:17:11 +00:00
|
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#ifdef IPACCT
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case IP_ACCT_DEL:
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case IP_ACCT_ADD:
|
1994-12-13 15:57:34 +00:00
|
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case IP_ACCT_CLR:
|
1994-11-16 10:17:11 +00:00
|
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case IP_ACCT_FLUSH:
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|
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case IP_ACCT_ZERO:
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|
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|
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|
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if (op = PRCO_SETOPT) {
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|
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error=ip_acct_ctl(optname, *m);
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if (*m)
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|
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(void)m_free(*m);
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|
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}
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else
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|
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error=EINVAL;
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return(error);
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#endif
|
1994-10-28 15:09:49 +00:00
|
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|
1994-09-06 22:42:31 +00:00
|
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case IP_RSVP_ON:
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|
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error = ip_rsvp_init(so);
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|
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break;
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case IP_RSVP_OFF:
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|
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error = ip_rsvp_done();
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break;
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|
|
1994-05-24 10:09:53 +00:00
|
|
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case DVMRP_INIT:
|
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|
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case DVMRP_DONE:
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|
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case DVMRP_ADD_VIF:
|
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|
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case DVMRP_DEL_VIF:
|
1994-09-06 22:42:31 +00:00
|
|
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case DVMRP_ADD_MFC:
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|
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case DVMRP_DEL_MFC:
|
1994-05-24 10:09:53 +00:00
|
|
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if (op == PRCO_SETOPT) {
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|
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error = ip_mrouter_cmd(optname, so, *m);
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|
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if (*m)
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|
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(void)m_free(*m);
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|
|
} else
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|
|
error = EINVAL;
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|
|
return (error);
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|
|
|
}
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|
|
return (ip_ctloutput(op, so, level, optname, m));
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|
|
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}
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|
|
|
|
|
|
|
u_long rip_sendspace = RIPSNDQ;
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|
|
u_long rip_recvspace = RIPRCVQ;
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|
|
|
|
|
|
/*ARGSUSED*/
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|
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int
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|
|
rip_usrreq(so, req, m, nam, control)
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|
|
register struct socket *so;
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|
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int req;
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|
|
struct mbuf *m, *nam, *control;
|
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|
|
{
|
|
|
|
register int error = 0;
|
|
|
|
register struct inpcb *inp = sotoinpcb(so);
|
|
|
|
switch (req) {
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|
|
|
|
|
|
|
case PRU_ATTACH:
|
|
|
|
if (inp)
|
|
|
|
panic("rip_attach");
|
|
|
|
if ((so->so_state & SS_PRIV) == 0) {
|
|
|
|
error = EACCES;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if ((error = soreserve(so, rip_sendspace, rip_recvspace)) ||
|
|
|
|
(error = in_pcballoc(so, &rawinpcb)))
|
|
|
|
break;
|
|
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
|
|
inp->inp_ip.ip_p = (int)nam;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PRU_DISCONNECT:
|
|
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
|
|
|
error = ENOTCONN;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case PRU_ABORT:
|
|
|
|
soisdisconnected(so);
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case PRU_DETACH:
|
|
|
|
if (inp == 0)
|
|
|
|
panic("rip_detach");
|
|
|
|
if (so == ip_mrouter)
|
|
|
|
ip_mrouter_done();
|
|
|
|
in_pcbdetach(inp);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PRU_BIND:
|
|
|
|
{
|
|
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
|
|
|
|
|
|
|
if (nam->m_len != sizeof(*addr)) {
|
|
|
|
error = EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if ((ifnet == 0) ||
|
|
|
|
((addr->sin_family != AF_INET) &&
|
|
|
|
(addr->sin_family != AF_IMPLINK)) ||
|
|
|
|
(addr->sin_addr.s_addr &&
|
|
|
|
ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
|
|
|
|
error = EADDRNOTAVAIL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
inp->inp_laddr = addr->sin_addr;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PRU_CONNECT:
|
|
|
|
{
|
|
|
|
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
|
|
|
|
|
|
|
|
if (nam->m_len != sizeof(*addr)) {
|
|
|
|
error = EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (ifnet == 0) {
|
|
|
|
error = EADDRNOTAVAIL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if ((addr->sin_family != AF_INET) &&
|
|
|
|
(addr->sin_family != AF_IMPLINK)) {
|
|
|
|
error = EAFNOSUPPORT;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
inp->inp_faddr = addr->sin_addr;
|
|
|
|
soisconnected(so);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case PRU_CONNECT2:
|
|
|
|
error = EOPNOTSUPP;
|
|
|
|
break;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Mark the connection as being incapable of further input.
|
|
|
|
*/
|
|
|
|
case PRU_SHUTDOWN:
|
|
|
|
socantsendmore(so);
|
|
|
|
break;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Ship a packet out. The appropriate raw output
|
|
|
|
* routine handles any massaging necessary.
|
|
|
|
*/
|
|
|
|
case PRU_SEND:
|
|
|
|
{
|
|
|
|
register u_long dst;
|
|
|
|
|
|
|
|
if (so->so_state & SS_ISCONNECTED) {
|
|
|
|
if (nam) {
|
|
|
|
error = EISCONN;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
dst = inp->inp_faddr.s_addr;
|
|
|
|
} else {
|
|
|
|
if (nam == NULL) {
|
|
|
|
error = ENOTCONN;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
dst = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
|
|
|
|
}
|
|
|
|
error = rip_output(m, so, dst);
|
|
|
|
m = NULL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case PRU_SENSE:
|
|
|
|
/*
|
|
|
|
* stat: don't bother with a blocksize.
|
|
|
|
*/
|
|
|
|
return (0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Not supported.
|
|
|
|
*/
|
|
|
|
case PRU_RCVOOB:
|
|
|
|
case PRU_RCVD:
|
|
|
|
case PRU_LISTEN:
|
|
|
|
case PRU_ACCEPT:
|
|
|
|
case PRU_SENDOOB:
|
|
|
|
error = EOPNOTSUPP;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PRU_SOCKADDR:
|
|
|
|
in_setsockaddr(inp, nam);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PRU_PEERADDR:
|
|
|
|
in_setpeeraddr(inp, nam);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
panic("rip_usrreq");
|
|
|
|
}
|
|
|
|
if (m != NULL)
|
|
|
|
m_freem(m);
|
|
|
|
return (error);
|
|
|
|
}
|