[unix-history] / sys / netinet / raw_ip.c

/*
 * 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 1.3 1993/11/25 01:35:11 wollman 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.
 */
static struct	sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
static struct	sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
static struct	sockproto ripproto = { PF_INET };

/*
 * Setup generic address and protocol structures
 * for raw_input routine, then pass them along with
 * mbuf chain.
 */
void
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
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;
				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);
}

/*ARGSUSED*/
int
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);

	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 (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, control, 0);

	if (error && (req == PRU_ATTACH) && so->so_pcb)
		free(so->so_pcb, M_PCB);
	return (error);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
38e82238	33	* from: @(#)raw_ip.c 7.8 (Berkeley) 7/25/90
fde1aeb2	34	* $Id: raw_ip.c,v 1.3 1993/11/25 01:35:11 wollman Exp $
15637ed4 RG	35	*/
	36
	37	#include "param.h"
	38	#include "malloc.h"
	39	#include "mbuf.h"
	40	#include "socket.h"
	41	#include "protosw.h"
	42	#include "socketvar.h"
	43	#include "errno.h"
	44
	45	#include "../net/if.h"
	46	#include "../net/route.h"
	47	#include "../net/raw_cb.h"
	48
	49	#include "in.h"
	50	#include "in_systm.h"
	51	#include "ip.h"
	52	#include "ip_var.h"
	53	#include "in_pcb.h"
	54
	55	/*
	56	* Raw interface to IP protocol.
	57	*/
fde1aeb2 GW	58	static struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
	59	static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
	60	static struct sockproto ripproto = { PF_INET };
15637ed4	61
15637ed4 RG	62	/*
	63	* Setup generic address and protocol structures
	64	* for raw_input routine, then pass them along with
	65	* mbuf chain.
	66	*/
4c45483e	67	void
15637ed4 RG	68	rip_input(m)
	69	struct mbuf *m;
	70	{
	71	register struct ip ip = mtod(m, struct ip );
	72
	73	ripproto.sp_protocol = ip->ip_p;
	74	ripdst.sin_addr = ip->ip_dst;
	75	ripsrc.sin_addr = ip->ip_src;
	76	if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
	77	(struct sockaddr *)&ripdst) == 0) {
	78	ipstat.ips_noproto++;
	79	ipstat.ips_delivered--;
	80	}
	81	}
	82
	83	/*
	84	* Generate IP header and pass packet to ip_output.
	85	* Tack on options user may have setup with control call.
	86	*/
	87	#define satosin(sa) ((struct sockaddr_in *)(sa))
4c45483e	88	int
15637ed4 RG	89	rip_output(m, so)
	90	register struct mbuf *m;
	91	struct socket *so;
	92	{
	93	register struct ip *ip;
	94	register struct raw_inpcb *rp = sotorawinpcb(so);
	95	register struct sockaddr_in *sin;
	96
	97	/*
	98	* If the user handed us a complete IP packet, use it.
	99	* Otherwise, allocate an mbuf for a header and fill it in.
	100	*/
	101	if (rp->rinp_flags & RINPF_HDRINCL)
	102	ip = mtod(m, struct ip *);
	103	else {
	104	M_PREPEND(m, sizeof(struct ip), M_WAIT);
	105	ip = mtod(m, struct ip *);
	106	ip->ip_tos = 0;
	107	ip->ip_off = 0;
	108	ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
	109	ip->ip_len = m->m_pkthdr.len;
	110	if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
	111	ip->ip_src = sin->sin_addr;
	112	} else
	113	ip->ip_src.s_addr = 0;
	114	if (sin = satosin(rp->rinp_rcb.rcb_faddr))
	115	ip->ip_dst = sin->sin_addr;
	116	ip->ip_ttl = MAXTTL;
	117	}
	118	return (ip_output(m,
	119	(rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
	120	&rp->rinp_route,
	121	(so->so_options & SO_DONTROUTE) \| IP_ALLOWBROADCAST));
	122	}
	123
	124	/*
	125	* Raw IP socket option processing.
	126	*/
4c45483e	127	int
15637ed4 RG	128	rip_ctloutput(op, so, level, optname, m)
	129	int op;
	130	struct socket *so;
	131	int level, optname;
	132	struct mbuf **m;
	133	{
	134	int error = 0;
	135	register struct raw_inpcb *rp = sotorawinpcb(so);
	136
	137	if (level != IPPROTO_IP)
	138	error = EINVAL;
	139	else switch (op) {
	140
	141	case PRCO_SETOPT:
	142	switch (optname) {
	143
	144	case IP_OPTIONS:
	145	return (ip_pcbopts(&rp->rinp_options, *m));
	146
	147	case IP_HDRINCL:
	148	if (m == 0 \|\| m == 0 \|\| (m)->m_len < sizeof (int)) {
	149	error = EINVAL;
	150	break;
	151	}
	152	if (mtod(m, int *))
	153	rp->rinp_flags \|= RINPF_HDRINCL;
	154	else
	155	rp->rinp_flags &= ~RINPF_HDRINCL;
	156	break;
	157
	158	default:
	159	error = EINVAL;
	160	break;
	161	}
	162	break;
	163
	164	case PRCO_GETOPT:
	165	*m = m_get(M_WAIT, MT_SOOPTS);
	166	switch (optname) {
	167
	168	case IP_OPTIONS:
	169	if (rp->rinp_options) {
	170	(*m)->m_len = rp->rinp_options->m_len;
	171	bcopy(mtod(rp->rinp_options, caddr_t),
	172	mtod(m, caddr_t), (unsigned)(m)->m_len);
	173	} else
	174	(*m)->m_len = 0;
	175	break;
	176
	177	case IP_HDRINCL:
	178	(*m)->m_len = sizeof (int);
	179	mtod(m, int *) = rp->rinp_flags & RINPF_HDRINCL;
	180	break;
	181
	182	default:
	183	error = EINVAL;
	184	m_freem(*m);
	185	*m = 0;
	186	break;
	187	}
	188	break;
	189	}
	190	if (op == PRCO_SETOPT && *m)
	191	(void)m_free(*m);
192	return (error);
193	}
194
195	/ARGSUSED/
4c45483e	196	int
15637ed4 RG	197	rip_usrreq(so, req, m, nam, control)
	198	register struct socket *so;
	199	int req;
	200	struct mbuf m, nam, *control;
	201	{
	202	register int error = 0;
	203	register struct raw_inpcb *rp = sotorawinpcb(so);
	204
	205	switch (req) {
	206
	207	case PRU_ATTACH:
	208	if (rp)
	209	panic("rip_attach");
	210	MALLOC(rp, struct raw_inpcb , sizeof rp, M_PCB, M_WAITOK);
	211	if (rp == 0)
	212	return (ENOBUFS);
	213	bzero((caddr_t)rp, sizeof *rp);
	214	so->so_pcb = (caddr_t)rp;
	215	break;
	216
	217	case PRU_DETACH:
	218	if (rp == 0)
	219	panic("rip_detach");
	220	if (rp->rinp_options)
	221	m_freem(rp->rinp_options);
	222	if (rp->rinp_route.ro_rt)
	223	RTFREE(rp->rinp_route.ro_rt);
	224	if (rp->rinp_rcb.rcb_laddr)
	225	rp->rinp_rcb.rcb_laddr = 0;
	226	break;
	227
	228	case PRU_BIND:
	229	{
	230	struct sockaddr_in addr = mtod(nam, struct sockaddr_in );
	231
	232	if (nam->m_len != sizeof(*addr))
	233	return (EINVAL);
	234	if ((ifnet == 0) \|\|
	235	((addr->sin_family != AF_INET) &&
	236	(addr->sin_family != AF_IMPLINK)) \|\|
	237	(addr->sin_addr.s_addr &&
	238	ifa_ifwithaddr((struct sockaddr *)addr) == 0))
	239	return (EADDRNOTAVAIL);
	240	rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
	241	rp->rinp_laddr = *addr;
	242	return (0);
	243	}
	244	case PRU_CONNECT:
	245	{
	246	struct sockaddr_in addr = mtod(nam, struct sockaddr_in );
	247
	248	if (nam->m_len != sizeof(*addr))
	249	return (EINVAL);
	250	if (ifnet == 0)
	251	return (EADDRNOTAVAIL);
	252	if ((addr->sin_family != AF_INET) &&
	253	(addr->sin_family != AF_IMPLINK))
	254	return (EAFNOSUPPORT);
	255	rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
	256	rp->rinp_faddr = *addr;
	257	soisconnected(so);
	258	return (0);
	259	}
	260	}
fde1aeb2	261	error = raw_usrreq(so, req, m, nam, control, 0);
15637ed4 RG	262
	263	if (error && (req == PRU_ATTACH) && so->so_pcb)
	264	free(so->so_pcb, M_PCB);
	265	return (error);
	266	}