in_proto.c revision 29514 
1/*
2 * Copyright (c) 1982, 1986, 1993
3 *	The Regents of the University of California.  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 *	@(#)in_proto.c	8.2 (Berkeley) 2/9/95
34 *	$Id: in_proto.c,v 1.41 1997/09/16 11:43:55 bde Exp $
35 */
36
37#include "opt_tcpdebug.h"
38
39#include <sys/param.h>
40#include <sys/queue.h>
41#include <sys/kernel.h>
42#include <sys/socket.h>
43#include <sys/socketvar.h>
44#include <sys/domain.h>
45#include <sys/mbuf.h>
46#include <sys/protosw.h>
47#include <sys/sysctl.h>
48
49#include <net/if.h>
50#include <net/radix.h>
51#include <net/route.h>
52
53#include <netinet/in.h>
54#include <netinet/in_systm.h>
55#include <netinet/ip.h>
56#include <netinet/ip_var.h>
57#include <netinet/ip_icmp.h>
58#include <netinet/in_pcb.h>
59#include <netinet/igmp_var.h>
60#include <netinet/tcp.h>
61#include <netinet/tcp_fsm.h>
62#include <netinet/tcp_seq.h>
63#include <netinet/tcp_timer.h>
64#include <netinet/tcp_var.h>
65#include <netinet/tcpip.h>
66#ifdef TCPDEBUG
67#include <netinet/tcp_debug.h>
68#endif
69#include <netinet/udp.h>
70#include <netinet/udp_var.h>
71/*
72 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
73 */
74
75#ifdef IPXIP
76#include <netipx/ipx.h>
77#include <netipx/ipx_ip.h>
78#endif
79
80#ifdef NSIP
81#include <netns/ns.h>
82#include <netns/ns_if.h>
83#endif
84
85#ifdef TPIP
86void	tpip_input(), tpip_ctlinput(), tp_init(), tp_slowtimo(), tp_drain();
87int	tp_ctloutput(), tp_usrreq();
88#endif
89
90#ifdef EON
91void	eoninput(), eonctlinput(), eonprotoinit();
92#endif /* EON */
93
94#ifdef        IPFILTER
95void	iplinit();
96#define	ip_init	iplinit
97#endif
98
99
100extern	struct domain inetdomain;
101static	struct pr_usrreqs nousrreqs;
102
103struct protosw inetsw[] = {
104{ 0,		&inetdomain,	0,		0,
105  0,		0,		0,		0,
106  0,
107  ip_init,	0,		ip_slowtimo,	ip_drain,
108  &nousrreqs
109},
110{ SOCK_DGRAM,	&inetdomain,	IPPROTO_UDP,	PR_ATOMIC|PR_ADDR,
111  udp_input,	0,		udp_ctlinput,	ip_ctloutput,
112  0,
113  udp_init,	0,		0,		0,
114  &udp_usrreqs
115},
116{ SOCK_STREAM,	&inetdomain,	IPPROTO_TCP,
117	PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
118  tcp_input,	0,		tcp_ctlinput,	tcp_ctloutput,
119  0,
120  tcp_init,	tcp_fasttimo,	tcp_slowtimo,	tcp_drain,
121  &tcp_usrreqs
122},
123{ SOCK_RAW,	&inetdomain,	IPPROTO_RAW,	PR_ATOMIC|PR_ADDR,
124  rip_input,	0,		rip_ctlinput,	rip_ctloutput,
125  0,
126  0,		0,		0,		0,
127  &rip_usrreqs
128},
129{ SOCK_RAW,	&inetdomain,	IPPROTO_ICMP,	PR_ATOMIC|PR_ADDR,
130  icmp_input,	0,		0,		rip_ctloutput,
131  0,
132  0,		0,		0,		0,
133  &rip_usrreqs
134},
135{ SOCK_RAW,	&inetdomain,	IPPROTO_IGMP,	PR_ATOMIC|PR_ADDR,
136  igmp_input,	0,		0,		rip_ctloutput,
137  0,
138  igmp_init,	igmp_fasttimo,	igmp_slowtimo,	0,
139  &rip_usrreqs
140},
141{ SOCK_RAW,	&inetdomain,	IPPROTO_RSVP,	PR_ATOMIC|PR_ADDR,
142  rsvp_input,	0,		0,		rip_ctloutput,
143  0,
144  0,		0,		0,		0,
145  &rip_usrreqs
146},
147{ SOCK_RAW,	&inetdomain,	IPPROTO_IPIP,	PR_ATOMIC|PR_ADDR,
148  ipip_input,	0,	 	0,		rip_ctloutput,
149  0,
150  0,		0,		0,		0,
151  &rip_usrreqs
152},
153#ifdef IPDIVERT
154{ SOCK_RAW,	&inetdomain,	IPPROTO_DIVERT,	PR_ATOMIC|PR_ADDR,
155  div_input,	0,	 	0,		ip_ctloutput,
156  0,
157  div_init,	0,		0,		0,
158  &div_usrreqs,
159},
160#endif
161#ifdef TPIP
162{ SOCK_SEQPACKET,&inetdomain,	IPPROTO_TP,	PR_CONNREQUIRED|PR_WANTRCVD,
163  tpip_input,	0,		tpip_ctlinput,	tp_ctloutput,
164  tp_usrreq,
165  tp_init,	0,		tp_slowtimo,	tp_drain,
166},
167#endif
168/* EON (ISO CLNL over IP) */
169#ifdef EON
170{ SOCK_RAW,	&inetdomain,	IPPROTO_EON,	0,
171  eoninput,	0,		eonctlinput,		0,
172  0,
173  eonprotoinit,	0,		0,		0,
174},
175#endif
176#ifdef IPXIP
177{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
178  ipxip_input,	0,		ipxip_ctlinput,	0,
179  0,
180  0,		0,		0,		0,
181  &rip_usrreqs
182},
183#endif
184#ifdef NSIP
185{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
186  idpip_input,	0,		nsip_ctlinput,	0,
187  0,
188  0,		0,		0,		0,
189  &rip_usrreqs
190},
191#endif
192	/* raw wildcard */
193{ SOCK_RAW,	&inetdomain,	0,		PR_ATOMIC|PR_ADDR,
194  rip_input,	0,		0,		rip_ctloutput,
195  0,
196  rip_init,	0,		0,		0,
197  &rip_usrreqs
198},
199};
200
201extern int in_inithead __P((void **, int));
202
203struct domain inetdomain =
204    { AF_INET, "internet", 0, 0, 0,
205      inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
206      in_inithead, 32, sizeof(struct sockaddr_in)
207    };
208
209DOMAIN_SET(inet);
210
211SYSCTL_NODE(_net,      PF_INET,		inet,	CTLFLAG_RW, 0,
212	"Internet Family");
213
214SYSCTL_NODE(_net_inet, IPPROTO_IP,	ip,	CTLFLAG_RW, 0,	"IP");
215SYSCTL_NODE(_net_inet, IPPROTO_ICMP,	icmp,	CTLFLAG_RW, 0,	"ICMP");
216SYSCTL_NODE(_net_inet, IPPROTO_UDP,	udp,	CTLFLAG_RW, 0,	"UDP");
217SYSCTL_NODE(_net_inet, IPPROTO_TCP,	tcp,	CTLFLAG_RW, 0,	"TCP");
218SYSCTL_NODE(_net_inet, IPPROTO_IGMP,	igmp,	CTLFLAG_RW, 0,	"IGMP");
219SYSCTL_NODE(_net_inet, IPPROTO_RAW,	raw,	CTLFLAG_RW, 0,	"RAW");
220#ifdef IPDIVERT
221SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,	div,	CTLFLAG_RW, 0,	"DIVERT");
222#endif
223
224