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NetBSD/sys/netinet/raw_ip.c
hpeyerl aa7f3b23a8 multicast support. 
>From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.
1993-12-06 04:50:19 +00:00

306 lines
7.9 KiB
C
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/*
* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)raw_ip.c 7.8 (Berkeley) 7/25/90
* $Id: raw_ip.c,v 1.6 1993/12/06 04:59:44 hpeyerl Exp $
*/
#include "param.h"
#include "malloc.h"
#include "mbuf.h"
#include "socket.h"
#include "protosw.h"
#include "socketvar.h"
#include "errno.h"
#include "../net/if.h"
#include "../net/route.h"
#include "../net/raw_cb.h"
#include "in.h"
#include "in_systm.h"
#include "ip.h"
#include "ip_var.h"
#include "in_pcb.h"
/*
* Raw interface to IP protocol.
*/
struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
struct sockproto ripproto = { PF_INET };
/*
* Setup generic address and protocol structures
* for raw_input routine, then pass them along with
* mbuf chain.
*/
rip_input(m)
struct mbuf *m;
{
register struct ip *ip = mtod(m, struct ip *);
ripproto.sp_protocol = ip->ip_p;
ripdst.sin_addr = ip->ip_dst;
ripsrc.sin_addr = ip->ip_src;
if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
(struct sockaddr *)&ripdst) == 0) {
ipstat.ips_noproto++;
ipstat.ips_delivered--;
}
}
/*
* Generate IP header and pass packet to ip_output.
* Tack on options user may have setup with control call.
*/
#define satosin(sa) ((struct sockaddr_in *)(sa))
rip_output(m, so)
register struct mbuf *m;
struct socket *so;
{
register struct ip *ip;
register struct raw_inpcb *rp = sotorawinpcb(so);
register struct sockaddr_in *sin;
/*
* If the user handed us a complete IP packet, use it.
* Otherwise, allocate an mbuf for a header and fill it in.
*/
if (rp->rinp_flags & RINPF_HDRINCL) {
ip = mtod(m, struct ip *);
if (ip->ip_len > m->m_pkthdr.len)
return EMSGSIZE;
ip->ip_len = m->m_pkthdr.len;
} else {
M_PREPEND(m, sizeof(struct ip), M_WAIT);
ip = mtod(m, struct ip *);
ip->ip_tos = 0;
ip->ip_off = 0;
ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
ip->ip_len = m->m_pkthdr.len;
if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
ip->ip_src = sin->sin_addr;
} else
ip->ip_src.s_addr = 0;
if (sin = satosin(rp->rinp_rcb.rcb_faddr))
ip->ip_dst = sin->sin_addr;
ip->ip_ttl = MAXTTL;
}
return (ip_output(m,
(rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
&rp->rinp_route,
(so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
#ifdef MULTICAST
| IP_MULTICASTOPTS, rp->rinp_rcb.rcb_moptions
#endif
));
}
/*
* Raw IP socket option processing.
*/
rip_ctloutput(op, so, level, optname, m)
int op;
struct socket *so;
int level, optname;
struct mbuf **m;
{
int error = 0;
register struct raw_inpcb *rp = sotorawinpcb(so);
if (level != IPPROTO_IP)
error = EINVAL;
else switch (op) {
case PRCO_SETOPT:
switch (optname) {
case IP_OPTIONS:
return (ip_pcbopts(&rp->rinp_options, *m));
case IP_HDRINCL:
if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int)) {
error = EINVAL;
break;
}
if (*mtod(*m, int *))
rp->rinp_flags |= RINPF_HDRINCL;
else
rp->rinp_flags &= ~RINPF_HDRINCL;
break;
#ifdef MULTICAST
case IP_MULTICAST_IF:
case IP_MULTICAST_TTL:
case IP_MULTICAST_LOOP:
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
error = ip_setmoptions(optname,
&rp->rinp_rcb.rcb_moptions, *m);
break;
default:
#ifdef MROUTING
error = ip_mrouter_cmd(optname, so, *m);
#else
error = EINVAL;
#endif
break;
#else
default:
error = EINVAL;
break;
#endif
}
break;
case PRCO_GETOPT:
*m = m_get(M_WAIT, MT_SOOPTS);
switch (optname) {
case IP_OPTIONS:
if (rp->rinp_options) {
(*m)->m_len = rp->rinp_options->m_len;
bcopy(mtod(rp->rinp_options, caddr_t),
mtod(*m, caddr_t), (unsigned)(*m)->m_len);
} else
(*m)->m_len = 0;
break;
case IP_HDRINCL:
(*m)->m_len = sizeof (int);
*mtod(*m, int *) = rp->rinp_flags & RINPF_HDRINCL;
break;
#ifdef MULTICAST
case IP_MULTICAST_IF:
case IP_MULTICAST_TTL:
case IP_MULTICAST_LOOP:
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
error = ip_getmoptions(optname,
rp->rinp_rcb.rcb_moptions, m);
break;
#endif
default:
error = EINVAL;
m_freem(*m);
*m = 0;
break;
}
break;
}
if (op == PRCO_SETOPT && *m)
(void)m_free(*m);
return (error);
}
/*ARGSUSED*/
rip_usrreq(so, req, m, nam, control)
register struct socket *so;
int req;
struct mbuf *m, *nam, *control;
{
register int error = 0;
register struct raw_inpcb *rp = sotorawinpcb(so);
#if defined(MULTICAST) && defined(MROUTING)
extern struct socket *ip_mrouter;
#endif
switch (req) {
case PRU_ATTACH:
if (rp)
panic("rip_attach");
MALLOC(rp, struct raw_inpcb *, sizeof *rp, M_PCB, M_WAITOK);
if (rp == 0)
return (ENOBUFS);
bzero((caddr_t)rp, sizeof *rp);
so->so_pcb = (caddr_t)rp;
break;
case PRU_DETACH:
if (rp == 0)
panic("rip_detach");
#if defined(MULTICAST) && defined(MROUTING)
if (so == ip_mrouter)
ip_mrouter_done();
#endif
if (rp->rinp_options)
m_freem(rp->rinp_options);
#ifdef MULTICAST
if (rp->rinp_rcb.rcb_moptions)
ip_freemoptions(rp->rinp_rcb.rcb_moptions);
#endif
if (rp->rinp_route.ro_rt)
RTFREE(rp->rinp_route.ro_rt);
if (rp->rinp_rcb.rcb_laddr)
rp->rinp_rcb.rcb_laddr = 0;
break;
case PRU_BIND:
{
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
if (nam->m_len != sizeof(*addr))
return (EINVAL);
if ((ifnet == 0) ||
((addr->sin_family != AF_INET) &&
(addr->sin_family != AF_IMPLINK)) ||
(addr->sin_addr.s_addr &&
ifa_ifwithaddr((struct sockaddr *)addr) == 0))
return (EADDRNOTAVAIL);
rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
rp->rinp_laddr = *addr;
return (0);
}
case PRU_CONNECT:
{
struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
if (nam->m_len != sizeof(*addr))
return (EINVAL);
if (ifnet == 0)
return (EADDRNOTAVAIL);
if ((addr->sin_family != AF_INET) &&
(addr->sin_family != AF_IMPLINK))
return (EAFNOSUPPORT);
rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
rp->rinp_faddr = *addr;
soisconnected(so);
return (0);
}
}
error = raw_usrreq(so, req, m, nam, control);
if (error && (req == PRU_ATTACH) && so->so_pcb)
free(so->so_pcb, M_PCB);
return (error);
}
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