[unix-history] / sys / netns / ns_output.c

/*
 * Copyright (c) 1984, 1985, 1986, 1987 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: @(#)ns_output.c	7.8 (Berkeley) 12/16/90
 *	$Id$
 */

#include "param.h"
#include "malloc.h"
#include "mbuf.h"
#include "errno.h"
#include "socket.h"
#include "socketvar.h"

#include "../net/if.h"
#include "../net/route.h"

#include "ns.h"
#include "ns_if.h"
#include "idp.h"
#include "idp_var.h"

#ifdef vax
#include "vax/include/mtpr.h"
#endif
int ns_hold_output = 0;
int ns_copy_output = 0;
int ns_output_cnt = 0;
struct mbuf *ns_lastout;

ns_output(m0, ro, flags)
	struct mbuf *m0;
	struct route *ro;
	int flags;
{
	register struct idp *idp = mtod(m0, struct idp *);
	register struct ifnet *ifp = 0;
	int error = 0;
	struct route idproute;
	struct sockaddr_ns *dst;
	extern int idpcksum;

	if (ns_hold_output) {
		if (ns_lastout) {
			(void)m_free(ns_lastout);
		}
		ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
	}
	/*
	 * Route packet.
	 */
	if (ro == 0) {
		ro = &idproute;
		bzero((caddr_t)ro, sizeof (*ro));
	}
	dst = (struct sockaddr_ns *)&ro->ro_dst;
	if (ro->ro_rt == 0) {
		dst->sns_family = AF_NS;
		dst->sns_len = sizeof (*dst);
		dst->sns_addr = idp->idp_dna;
		dst->sns_addr.x_port = 0;
		/*
		 * If routing to interface only,
		 * short circuit routing lookup.
		 */
		if (flags & NS_ROUTETOIF) {
			struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);

			if (ia == 0) {
				error = ENETUNREACH;
				goto bad;
			}
			ifp = ia->ia_ifp;
			goto gotif;
		}
		rtalloc(ro);
	} else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
		/*
		 * The old route has gone away; try for a new one.
		 */
		rtfree(ro->ro_rt);
		ro->ro_rt = NULL;
		rtalloc(ro);
	}
	if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
		error = ENETUNREACH;
		goto bad;
	}
	ro->ro_rt->rt_use++;
	if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
		dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
gotif:

	/*
	 * Look for multicast addresses and
	 * and verify user is allowed to send
	 * such a packet.
	 */
	if (dst->sns_addr.x_host.c_host[0]&1) {
		if ((ifp->if_flags & IFF_BROADCAST) == 0) {
			error = EADDRNOTAVAIL;
			goto bad;
		}
		if ((flags & NS_ALLOWBROADCAST) == 0) {
			error = EACCES;
			goto bad;
		}
	}

	if (htons(idp->idp_len) <= ifp->if_mtu) {
		ns_output_cnt++;
		if (ns_copy_output) {
			ns_watch_output(m0, ifp);
		}
		error = (*ifp->if_output)(ifp, m0,
					(struct sockaddr *)dst, ro->ro_rt);
		goto done;
	} else error = EMSGSIZE;


bad:
	if (ns_copy_output) {
		ns_watch_output(m0, ifp);
	}
	m_freem(m0);
done:
	if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {
		RTFREE(ro->ro_rt);
		ro->ro_rt = 0;
	}
	return (error);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1984, 1985, 1986, 1987 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	*
78ed81a3	33	* from: @(#)ns_output.c 7.8 (Berkeley) 12/16/90
78ed81a3	34	* $Id$
15637ed4 RG	35	*/
	36
	37	#include "param.h"
	38	#include "malloc.h"
	39	#include "mbuf.h"
	40	#include "errno.h"
	41	#include "socket.h"
	42	#include "socketvar.h"
	43
	44	#include "../net/if.h"
	45	#include "../net/route.h"
	46
	47	#include "ns.h"
	48	#include "ns_if.h"
	49	#include "idp.h"
	50	#include "idp_var.h"
	51
	52	#ifdef vax
	53	#include "vax/include/mtpr.h"
	54	#endif
	55	int ns_hold_output = 0;
	56	int ns_copy_output = 0;
	57	int ns_output_cnt = 0;
	58	struct mbuf *ns_lastout;
	59
	60	ns_output(m0, ro, flags)
	61	struct mbuf *m0;
	62	struct route *ro;
	63	int flags;
	64	{
	65	register struct idp idp = mtod(m0, struct idp );
	66	register struct ifnet *ifp = 0;
	67	int error = 0;
	68	struct route idproute;
	69	struct sockaddr_ns *dst;
	70	extern int idpcksum;
	71
	72	if (ns_hold_output) {
	73	if (ns_lastout) {
	74	(void)m_free(ns_lastout);
	75	}
	76	ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
	77	}
	78	/*
	79	* Route packet.
	80	*/
	81	if (ro == 0) {
	82	ro = &idproute;
	83	bzero((caddr_t)ro, sizeof (*ro));
	84	}
	85	dst = (struct sockaddr_ns *)&ro->ro_dst;
	86	if (ro->ro_rt == 0) {
	87	dst->sns_family = AF_NS;
	88	dst->sns_len = sizeof (*dst);
	89	dst->sns_addr = idp->idp_dna;
	90	dst->sns_addr.x_port = 0;
	91	/*
	92	* If routing to interface only,
	93	* short circuit routing lookup.
	94	*/
	95	if (flags & NS_ROUTETOIF) {
	96	struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
	97
	98	if (ia == 0) {
99	error = ENETUNREACH;
100	goto bad;
101	}
102	ifp = ia->ia_ifp;
103	goto gotif;
104	}
105	rtalloc(ro);
106	} else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
107	/*
108	* The old route has gone away; try for a new one.
109	*/
110	rtfree(ro->ro_rt);
111	ro->ro_rt = NULL;
112	rtalloc(ro);
113	}
114	if (ro->ro_rt == 0 \|\| (ifp = ro->ro_rt->rt_ifp) == 0) {
115	error = ENETUNREACH;
116	goto bad;
117	}
118	ro->ro_rt->rt_use++;
119	if (ro->ro_rt->rt_flags & (RTF_GATEWAY\|RTF_HOST))
120	dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
121	gotif:
122
123	/*
124	* Look for multicast addresses and
125	* and verify user is allowed to send
126	* such a packet.
127	*/
128	if (dst->sns_addr.x_host.c_host[0]&1) {
129	if ((ifp->if_flags & IFF_BROADCAST) == 0) {
130	error = EADDRNOTAVAIL;
131	goto bad;
132	}
133	if ((flags & NS_ALLOWBROADCAST) == 0) {
134	error = EACCES;
135	goto bad;
136	}
137	}
138
139	if (htons(idp->idp_len) <= ifp->if_mtu) {
140	ns_output_cnt++;
141	if (ns_copy_output) {
142	ns_watch_output(m0, ifp);
143	}
144	error = (*ifp->if_output)(ifp, m0,
145	(struct sockaddr *)dst, ro->ro_rt);
146	goto done;
147	} else error = EMSGSIZE;
148
149
150	bad:
151	if (ns_copy_output) {
152	ns_watch_output(m0, ifp);
153	}
154	m_freem(m0);
155	done:
156	if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {
157	RTFREE(ro->ro_rt);
158	ro->ro_rt = 0;
159	}
160	return (error);
161	}