[apple/xnu.git] / bsd / netns / ns_output.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1984, 1985, 1986, 1987, 1993
 *	The 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.
 *
 *	@(#)ns_output.c	8.1 (Berkeley) 6/10/93
 */

#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

#include <net/if.h>
#include <net/route.h>

#include <netns/ns.h>
#include <netns/ns_if.h>
#include <netns/idp.h>
#include <netns/idp_var.h>

#ifdef vax
#include <machine/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
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1984, 1985, 1986, 1987, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)ns_output.c 8.1 (Berkeley) 6/10/93
	55	*/
	56
	57	#include <sys/param.h>
	58	#include <sys/malloc.h>
	59	#include <sys/mbuf.h>
	60	#include <sys/errno.h>
	61	#include <sys/socket.h>
	62	#include <sys/socketvar.h>
	63
	64	#include <net/if.h>
65	#include <net/route.h>
66
67	#include <netns/ns.h>
68	#include <netns/ns_if.h>
69	#include <netns/idp.h>
70	#include <netns/idp_var.h>
71
72	#ifdef vax
73	#include <machine/mtpr.h>
74	#endif
75	int ns_hold_output = 0;
76	int ns_copy_output = 0;
77	int ns_output_cnt = 0;
78	struct mbuf *ns_lastout;
79
80	ns_output(m0, ro, flags)
81	struct mbuf *m0;
82	struct route *ro;
83	int flags;
84	{
85	register struct idp idp = mtod(m0, struct idp );
86	register struct ifnet *ifp = 0;
87	int error = 0;
88	struct route idproute;
89	struct sockaddr_ns *dst;
90	extern int idpcksum;
91
92	if (ns_hold_output) {
93	if (ns_lastout) {
94	(void)m_free(ns_lastout);
95	}
96	ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
97	}
98	/*
99	* Route packet.
100	*/
101	if (ro == 0) {
102	ro = &idproute;
103	bzero((caddr_t)ro, sizeof (*ro));
104	}
105	dst = (struct sockaddr_ns *)&ro->ro_dst;
106	if (ro->ro_rt == 0) {
107	dst->sns_family = AF_NS;
108	dst->sns_len = sizeof (*dst);
109	dst->sns_addr = idp->idp_dna;
110	dst->sns_addr.x_port = 0;
111	/*
112	* If routing to interface only,
113	* short circuit routing lookup.
114	*/
115	if (flags & NS_ROUTETOIF) {
116	struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
117
118	if (ia == 0) {
119	error = ENETUNREACH;
120	goto bad;
121	}
122	ifp = ia->ia_ifp;
123	goto gotif;
124	}
125	rtalloc(ro);
126	} else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
127	/*
128	* The old route has gone away; try for a new one.
129	*/
130	rtfree(ro->ro_rt);
131	ro->ro_rt = NULL;
132	rtalloc(ro);
133	}
134	if (ro->ro_rt == 0 \|\| (ifp = ro->ro_rt->rt_ifp) == 0) {
135	error = ENETUNREACH;
136	goto bad;
137	}
138	ro->ro_rt->rt_use++;
139	if (ro->ro_rt->rt_flags & (RTF_GATEWAY\|RTF_HOST))
140	dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
141	gotif:
142
143	/*
144	* Look for multicast addresses and
145	* and verify user is allowed to send
146	* such a packet.
147	*/
148	if (dst->sns_addr.x_host.c_host[0]&1) {
149	if ((ifp->if_flags & IFF_BROADCAST) == 0) {
150	error = EADDRNOTAVAIL;
151	goto bad;
152	}
153	if ((flags & NS_ALLOWBROADCAST) == 0) {
154	error = EACCES;
155	goto bad;
156	}
157	}
158
159	if (htons(idp->idp_len) <= ifp->if_mtu) {
160	ns_output_cnt++;
161	if (ns_copy_output) {
162	ns_watch_output(m0, ifp);
163	}
164	error = (*ifp->if_output)(ifp, m0,
165	(struct sockaddr *)dst, ro->ro_rt);
166	goto done;
167	} else error = EMSGSIZE;
168
169
170	bad:
171	if (ns_copy_output) {
172	ns_watch_output(m0, ifp);
173	}
174	m_freem(m0);
175	done:
176	if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {
177	RTFREE(ro->ro_rt);
178	ro->ro_rt = 0;
179	}
180	return (error);
181	}