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raw_ip.c
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1993-08-12
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RCS_ID_C="$Id: raw_ip.c,v 1.8 1993/06/04 11:16:15 jraja Exp $";
/*
* Copyright (c) 1993 AmiTCP/IP Group, <amitcp-group@hut.fi>,
* Helsinki University of Technology, Finland.
* All rights reserved.
*
* HISTORY
* $Log: raw_ip.c,v $
* Revision 1.8 1993/06/04 11:16:15 jraja
* Fixes for first public release.
*
* Revision 1.7 1993/05/17 00:16:44 ppessi
* Changed RCS version. Added rcsid.
*
* Revision 1.6 1993/04/13 22:11:31 jraja
* Removed The extra argument of the rip_usrreq(), since it has one too many!
* The extra argument was passed to the raw_usrreq() which was wrong!
*
* Revision 1.5 93/04/11 22:26:48 22:26:48 jraja (Jarno Tapio Rajahalme)
* Added STKARGFUN to protocol input & output functions (if used in protosw).
*
* Revision 1.4 93/04/05 19:06:18 19:06:18 jraja (Jarno Tapio Rajahalme)
* Changed storage of the spl functions return values to type spl_t.
* Added include for conf.h to every .c file.
*
* Revision 1.3 93/03/22 16:59:32 16:59:32 jraja (Jarno Tapio Rajahalme)
* Changed bcopy()s and bzero()s with word aligned pointers to
* aligned_b(copy|zero) ar aligned_b(copy|zero)_const. The latter is for calls
* in which the size is constant.
* These can be disabled by defining NOALIGN.
* Converted bcopys doing structure copies (on aligned pointers) to structure
* assignments, since at least SASC produces better code with assignment.
*
* Revision 1.2 93/02/26 09:26:49 09:26:49 jraja (Jarno Tapio Rajahalme)
* Made this compile with ANSI C (added prototypes).
* Removed extra argument from call to raw_usrreq()
* (yes, prototypes do wonders :-)
*
* Revision 1.1 92/11/17 16:30:00 16:30:00 jraja (Jarno Tapio Rajahalme)
* Initial revision
*
*/
/*
* 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.
*
* @(#)raw_ip.c 7.8 (Berkeley) 7/25/90
*/
#include <conf.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/synch.h>
#include <net/if.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/raw_ip_protos.h>
#include <netinet/ip_output_protos.h>
#include <net/raw_usrreq_protos.h>
#include <kern/uipc_socket2_protos.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.
*/
void STKARGFUN
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))
int STKARGFUN
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 *);
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));
}
/*
* Raw IP socket option processing.
*/
int
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;
default:
error = EINVAL;
break;
}
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;
aligned_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;
default:
error = EINVAL;
m_freem(*m);
*m = 0;
break;
}
break;
}
if (op == PRCO_SETOPT && *m)
(void)m_free(*m);
return (error);
}
int
rip_usrreq(so, req, m, nam, /*rights,*/ control)
register struct socket *so;
int req;
struct mbuf *m, *nam, /**rights,*/ *control;
{
register int error = 0;
register struct raw_inpcb *rp = sotorawinpcb(so);
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);
aligned_bzero_const((caddr_t)rp, sizeof(*rp));
so->so_pcb = (caddr_t)rp;
break;
case PRU_DETACH:
if (rp == 0)
panic("rip_detach");
if (rp->rinp_options)
m_freem(rp->rinp_options);
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, /*rights,*/ control);
if (error && (req == PRU_ATTACH) && so->so_pcb)
bsd_free(so->so_pcb, M_PCB);
return (error);
}