[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.
 *
 *	@(#)raw_ip.c	7.8 (Berkeley) 7/25/90
 *
 * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
 * --------------------         -----   ----------------------
 * CURRENT PATCH LEVEL:         1       00020
 * --------------------         -----   ----------------------
 *
 * 03 Nov 92	Julian Elischer		Fixed memory leak that caused ping
 *					and traceroute to cause panic
 */

#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 *);
	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.
 */
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*/
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);

	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	*
	33	* @(#)raw_ip.c 7.8 (Berkeley) 7/25/90
	34	*
	35	* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
	36	* -------------------- ----- ----------------------
	37	* CURRENT PATCH LEVEL: 1 00020
	38	* -------------------- ----- ----------------------
	39	*
	40	* 03 Nov 92 Julian Elischer Fixed memory leak that caused ping
	41	* and traceroute to cause panic
	42	*/
	43
	44	#include "param.h"
	45	#include "malloc.h"
	46	#include "mbuf.h"
	47	#include "socket.h"
	48	#include "protosw.h"
	49	#include "socketvar.h"
	50	#include "errno.h"
	51
	52	#include "../net/if.h"
	53	#include "../net/route.h"
	54	#include "../net/raw_cb.h"
	55
	56	#include "in.h"
	57	#include "in_systm.h"
	58	#include "ip.h"
	59	#include "ip_var.h"
	60	#include "in_pcb.h"
	61
	62	/*
	63	* Raw interface to IP protocol.
	64	*/
65
66	struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
67	struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
68	struct sockproto ripproto = { PF_INET };
69	/*
70	* Setup generic address and protocol structures
71	* for raw_input routine, then pass them along with
72	* mbuf chain.
73	*/
74	rip_input(m)
75	struct mbuf *m;
76	{
77	register struct ip ip = mtod(m, struct ip );
78
79	ripproto.sp_protocol = ip->ip_p;
80	ripdst.sin_addr = ip->ip_dst;
81	ripsrc.sin_addr = ip->ip_src;
82	if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
83	(struct sockaddr *)&ripdst) == 0) {
84	ipstat.ips_noproto++;
85	ipstat.ips_delivered--;
86	}
87	}
88
89	/*
90	* Generate IP header and pass packet to ip_output.
91	* Tack on options user may have setup with control call.
92	*/
93	#define satosin(sa) ((struct sockaddr_in *)(sa))
94	rip_output(m, so)
95	register struct mbuf *m;
96	struct socket *so;
97	{
98	register struct ip *ip;
99	register struct raw_inpcb *rp = sotorawinpcb(so);
100	register struct sockaddr_in *sin;
101
102	/*
103	* If the user handed us a complete IP packet, use it.
104	* Otherwise, allocate an mbuf for a header and fill it in.
105	*/
106	if (rp->rinp_flags & RINPF_HDRINCL)
107	ip = mtod(m, struct ip *);
108	else {
109	M_PREPEND(m, sizeof(struct ip), M_WAIT);
110	ip = mtod(m, struct ip *);
111	ip->ip_tos = 0;
112	ip->ip_off = 0;
113	ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
114	ip->ip_len = m->m_pkthdr.len;
115	if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
116	ip->ip_src = sin->sin_addr;
117	} else
118	ip->ip_src.s_addr = 0;
119	if (sin = satosin(rp->rinp_rcb.rcb_faddr))
120	ip->ip_dst = sin->sin_addr;
121	ip->ip_ttl = MAXTTL;
122	}
123	return (ip_output(m,
124	(rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
125	&rp->rinp_route,
126	(so->so_options & SO_DONTROUTE) \| IP_ALLOWBROADCAST));
127	}
128
129	/*
130	* Raw IP socket option processing.
131	*/
132	rip_ctloutput(op, so, level, optname, m)
133	int op;
134	struct socket *so;
135	int level, optname;
136	struct mbuf **m;
137	{
138	int error = 0;
139	register struct raw_inpcb *rp = sotorawinpcb(so);
140
141	if (level != IPPROTO_IP)
142	error = EINVAL;
143	else switch (op) {
144
145	case PRCO_SETOPT:
146	switch (optname) {
147
148	case IP_OPTIONS:
149	return (ip_pcbopts(&rp->rinp_options, *m));
150
151	case IP_HDRINCL:
152	if (m == 0 \|\| m == 0 \|\| (m)->m_len < sizeof (int)) {
153	error = EINVAL;
154	break;
155	}
156	if (mtod(m, int *))
157	rp->rinp_flags \|= RINPF_HDRINCL;
158	else
159	rp->rinp_flags &= ~RINPF_HDRINCL;
160	break;
161
162	default:
163	error = EINVAL;
164	break;
165	}
166	break;
167
168	case PRCO_GETOPT:
169	*m = m_get(M_WAIT, MT_SOOPTS);
170	switch (optname) {
171
172	case IP_OPTIONS:
173	if (rp->rinp_options) {
174	(*m)->m_len = rp->rinp_options->m_len;
175	bcopy(mtod(rp->rinp_options, caddr_t),
176	mtod(m, caddr_t), (unsigned)(m)->m_len);
177	} else
178	(*m)->m_len = 0;
179	break;
180
181	case IP_HDRINCL:
182	(*m)->m_len = sizeof (int);
183	mtod(m, int *) = rp->rinp_flags & RINPF_HDRINCL;
184	break;
185
186	default:
187	error = EINVAL;
188	m_freem(*m);
189	*m = 0;
190	break;
191	}
192	break;
193	}
194	if (op == PRCO_SETOPT && *m)
195	(void)m_free(*m);
196	return (error);
197	}
198
199	/ARGSUSED/
200	rip_usrreq(so, req, m, nam, control)
201	register struct socket *so;
202	int req;
203	struct mbuf m, nam, *control;
204	{
205	register int error = 0;
206	register struct raw_inpcb *rp = sotorawinpcb(so);
207
208	switch (req) {
209
210	case PRU_ATTACH:
211	if (rp)
212	panic("rip_attach");
213	MALLOC(rp, struct raw_inpcb , sizeof rp, M_PCB, M_WAITOK);
214	if (rp == 0)
215	return (ENOBUFS);
216	bzero((caddr_t)rp, sizeof *rp);
217	so->so_pcb = (caddr_t)rp;
218	break;
219
220	case PRU_DETACH:
221	if (rp == 0)
222	panic("rip_detach");
223	if (rp->rinp_options)
224	m_freem(rp->rinp_options);
225	if (rp->rinp_route.ro_rt)
226	RTFREE(rp->rinp_route.ro_rt);
227	if (rp->rinp_rcb.rcb_laddr)
228	rp->rinp_rcb.rcb_laddr = 0;
229	break;
230
231	case PRU_BIND:
232	{
233	struct sockaddr_in addr = mtod(nam, struct sockaddr_in );
234
235	if (nam->m_len != sizeof(*addr))
236	return (EINVAL);
237	if ((ifnet == 0) \|\|
238	((addr->sin_family != AF_INET) &&
239	(addr->sin_family != AF_IMPLINK)) \|\|
240	(addr->sin_addr.s_addr &&
241	ifa_ifwithaddr((struct sockaddr *)addr) == 0))
242	return (EADDRNOTAVAIL);
243	rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
244	rp->rinp_laddr = *addr;
245	return (0);
246	}
247	case PRU_CONNECT:
248	{
249	struct sockaddr_in addr = mtod(nam, struct sockaddr_in );
250
251	if (nam->m_len != sizeof(*addr))
252	return (EINVAL);
253	if (ifnet == 0)
254	return (EADDRNOTAVAIL);
255	if ((addr->sin_family != AF_INET) &&
256	(addr->sin_family != AF_IMPLINK))
257	return (EAFNOSUPPORT);
258	rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
259	rp->rinp_faddr = *addr;
260	soisconnected(so);
261	return (0);
262	}
263	}
264	error = raw_usrreq(so, req, m, nam, control);
265
266	if (error && (req == PRU_ATTACH) && so->so_pcb)
267	free(so->so_pcb, M_PCB);
268	return (error);
269	}