summaryrefslogtreecommitdiffstats
path: root/sys/netinet/in_pcb.h
blob: 08733ad152a8f608e55e8db19b0bcff34b621448 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/*
 * Copyright (c) 1982, 1986, 1990, 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.
 *
 *	@(#)in_pcb.h	8.1 (Berkeley) 6/10/93
 * $FreeBSD$
 */

#ifndef _NETINET_IN_PCB_H_
#define _NETINET_IN_PCB_H_

#include <sys/queue.h>


#include <netinet6/ipsec.h> /* for IPSEC */

#define	in6pcb		inpcb	/* for KAME src sync over BSD*'s */
#define	in6p_sp		inp_sp	/* for KAME src sync over BSD*'s */

/*
 * Common structure pcb for internet protocol implementation.
 * Here are stored pointers to local and foreign host table
 * entries, local and foreign socket numbers, and pointers
 * up (to a socket structure) and down (to a protocol-specific)
 * control block.
 */
LIST_HEAD(inpcbhead, inpcb);
LIST_HEAD(inpcbporthead, inpcbport);
typedef	u_quad_t	inp_gen_t;

/*
 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
 * So, AF_INET6 null laddr is also used as AF_INET null laddr,
 * by utilize following structure. (At last, same as INRIA)
 */
struct in_addr_4in6 {
	u_int32_t	ia46_pad32[3];
	struct	in_addr	ia46_addr4;
};

/*
 * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
 * of the structure.  Therefore, it is important that the members in
 * that position not contain any information which is required to be
 * stable.
 */
struct	icmp6_filter;

struct inpcb {
	LIST_ENTRY(inpcb) inp_hash; /* hash list */
	u_short	inp_fport;		/* foreign port */
	u_short	inp_lport;		/* local port */
	LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
	u_int32_t	inp_flow;

	/* protocol dependent part, local and foreign addr */
	union {
		/* foreign host table entry */
		struct	in_addr_4in6 inp46_foreign;
		struct	in6_addr inp6_foreign;
	} inp_dependfaddr;
	union {
		/* local host table entry */
		struct	in_addr_4in6 inp46_local;
		struct	in6_addr inp6_local;
	} inp_dependladdr;

	caddr_t	inp_ppcb;		/* pointer to per-protocol pcb */
	struct	inpcbinfo *inp_pcbinfo;	/* PCB list info */
	struct	socket *inp_socket;	/* back pointer to socket */
					/* list for this PCB's local port */
	int	inp_flags;		/* generic IP/datagram flags */

	/* protocol dependent part; cached route */
	union {
		/* placeholder for routing entry */
		struct	route inp4_route;
		struct	route_in6 inp6_route;
	} inp_dependroute;

	struct	inpcbpolicy *inp_sp; /* for IPSEC */
	u_char	inp_vflag;
#define	INP_IPV4	0x1
#define	INP_IPV6	0x2
	u_char	inp_ip_ttl;		/* time to live proto */
	u_char	inp_ip_p;		/* protocol proto */

	/* protocol dependent part; options */
	struct {
		u_char	inp4_ip_tos;		/* type of service proto */
		struct	mbuf *inp4_options;	/* IP options */
		struct	ip_moptions *inp4_moptions; /* IP multicast options */
	} inp_depend4;
#define	inp_faddr	inp_dependfaddr.inp46_foreign.ia46_addr4
#define	inp_laddr	inp_dependladdr.inp46_local.ia46_addr4
#define	inp_route	inp_dependroute.inp4_route
#define	inp_ip_tos	inp_depend4.inp4_ip_tos
#define	inp_options	inp_depend4.inp4_options
#define	inp_moptions	inp_depend4.inp4_moptions
	struct {
		/* IP options */
		struct	mbuf *inp6_options;
		/* IP6 options for outgoing packets */
		struct	ip6_pktopts *inp6_outputopts;
		/* IP multicast options */
		struct	ip6_moptions *inp6_moptions;
		/* ICMPv6 code type filter */
		struct	icmp6_filter *inp6_icmp6filt;
		/* IPV6_CHECKSUM setsockopt */
		int	inp6_cksum;
		u_short	inp6_ifindex;
		short	inp6_hops;
		u_int8_t	inp6_hlim;
	} inp_depend6;
	LIST_ENTRY(inpcb) inp_portlist;
	struct	inpcbport *inp_phd;	/* head of this list */
	inp_gen_t	inp_gencnt;	/* generation count of this instance */
#define	in6p_faddr	inp_dependfaddr.inp6_foreign
#define	in6p_laddr	inp_dependladdr.inp6_local
#define	in6p_route	inp_dependroute.inp6_route
#define	in6p_ip6_hlim	inp_depend6.inp6_hlim
#define	in6p_hops	inp_depend6.inp6_hops	/* default hop limit */
#define	in6p_ip6_nxt	inp_ip_p
#define	in6p_flowinfo	inp_flow
#define	in6p_vflag	inp_vflag
#define	in6p_options	inp_depend6.inp6_options
#define	in6p_outputopts	inp_depend6.inp6_outputopts
#define	in6p_moptions	inp_depend6.inp6_moptions
#define	in6p_icmp6filt	inp_depend6.inp6_icmp6filt
#define	in6p_cksum	inp_depend6.inp6_cksum
#define	inp6_ifindex	inp_depend6.inp6_ifindex
#define	in6p_flags	inp_flags  /* for KAME src sync over BSD*'s */
#define	in6p_socket	inp_socket  /* for KAME src sync over BSD*'s */
#define	in6p_lport	inp_lport  /* for KAME src sync over BSD*'s */
#define	in6p_fport	inp_fport  /* for KAME src sync over BSD*'s */
#define	in6p_ppcb	inp_ppcb  /* for KAME src sync over BSD*'s */
};
/*
 * The range of the generation count, as used in this implementation,
 * is 9e19.  We would have to create 300 billion connections per
 * second for this number to roll over in a year.  This seems sufficiently
 * unlikely that we simply don't concern ourselves with that possibility.
 */

/*
 * Interface exported to userland by various protocols which use
 * inpcbs.  Hack alert -- only define if struct xsocket is in scope.
 */
#ifdef _SYS_SOCKETVAR_H_
struct	xinpcb {
	size_t	xi_len;		/* length of this structure */
	struct	inpcb xi_inp;
	struct	xsocket xi_socket;
	u_quad_t	xi_alignment_hack;
};

struct	xinpgen {
	size_t	xig_len;	/* length of this structure */
	u_int	xig_count;	/* number of PCBs at this time */
	inp_gen_t xig_gen;	/* generation count at this time */
	so_gen_t xig_sogen;	/* socket generation count at this time */
};
#endif /* _SYS_SOCKETVAR_H_ */

struct inpcbport {
	LIST_ENTRY(inpcbport) phd_hash;
	struct inpcbhead phd_pcblist;
	u_short phd_port;
};

struct inpcbinfo {		/* XXX documentation, prefixes */
	struct	inpcbhead *hashbase;
	u_long	hashmask;
	struct	inpcbporthead *porthashbase;
	u_long	porthashmask;
	struct	inpcbhead *listhead;
	u_short	lastport;
	u_short	lastlow;
	u_short	lasthi;
	struct	vm_zone *ipi_zone; /* zone to allocate pcbs from */
	u_int	ipi_count;	/* number of pcbs in this list */
	u_quad_t ipi_gencnt;	/* current generation count */
};

#define INP_PCBHASH(faddr, lport, fport, mask) \
	(((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
#define INP_PCBPORTHASH(lport, mask) \
	(ntohs((lport)) & (mask))

/* flags in inp_flags: */
#define	INP_RECVOPTS		0x01	/* receive incoming IP options */
#define	INP_RECVRETOPTS		0x02	/* receive IP options for reply */
#define	INP_RECVDSTADDR		0x04	/* receive IP dst address */
#define	INP_HDRINCL		0x08	/* user supplies entire IP header */
#define	INP_HIGHPORT		0x10	/* user wants "high" port binding */
#define	INP_LOWPORT		0x20	/* user wants "low" port binding */
#define	INP_ANONPORT		0x40	/* port chosen for user */
#define	INP_RECVIF		0x80	/* receive incoming interface */
#define	INP_MTUDISC		0x100	/* user can do MTU discovery */
#define	INP_FAITH		0x200	/* accept FAITH'ed connections */
#define	IN6P_PKTINFO		0x010000
#define	IN6P_HOPLIMIT		0x020000
#define	IN6P_NEXTHOP		0x040000
#define	IN6P_HOPOPTS		0x080000
#define	IN6P_DSTOPTS		0x100000
#define	IN6P_RTHDR		0x200000
#define	IN6P_BINDV6ONLY		0x400000
#define	INP_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
					INP_RECVIF|\
				 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_NEXTHOP|\
				 IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)

#define	INP_UNMAPPABLEOPTS	(IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)

 /* for KAME src sync over BSD*'s */
#define	IN6P_RECVOPTS		INP_RECVOPTS
#define	IN6P_RECVRETOPTS	INP_RECVRETOPTS
#define	IN6P_RECVDSTADDR	INP_RECVDSTADDR
#define	IN6P_HDRINCL		INP_HDRINCL
#define	IN6P_HIGHPORT		INP_HIGHPORT
#define	IN6P_LOWPORT		INP_LOWPORT
#define	IN6P_ANONPORT		INP_ANONPORT
#define	IN6P_RECVIF		INP_RECVIF
#define	IN6P_MTUDISC		INP_MTUDISC
#define	IN6P_FAITH		INP_FAITH
#define	IN6P_CONTROLOPTS INP_CONTROLOPTS
	/*
	 * socket AF version is {newer than,or include}
	 * actual datagram AF version
	 */

#define	INPLOOKUP_WILDCARD	1
#define	sotoinpcb(so)	((struct inpcb *)(so)->so_pcb)
#define	sotoin6pcb(so)	sotoinpcb(so) /* for KAME src sync over BSD*'s */

#define	INP_SOCKAF(so) so->so_proto->pr_domain->dom_family

#define	INP_CHECK_SOCKAF(so, af) 	(INP_SOCKAF(so) == af)

#ifdef _KERNEL
extern int	ipport_lowfirstauto;
extern int	ipport_lowlastauto;
extern int	ipport_firstauto;
extern int	ipport_lastauto;
extern int	ipport_hifirstauto;
extern int	ipport_hilastauto;

void	in_losing __P((struct inpcb *));
int	in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
int	in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
int	in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
void	in_pcbdetach __P((struct inpcb *));
void	in_pcbdisconnect __P((struct inpcb *));
int	in_pcbinshash __P((struct inpcb *));
int	in_pcbladdr __P((struct inpcb *, struct sockaddr *,
	    struct sockaddr_in **));
struct inpcb *
	in_pcblookup_local __P((struct inpcbinfo *,
	    struct in_addr, u_int, int));
struct inpcb *
	in_pcblookup_hash __P((struct inpcbinfo *,
			       struct in_addr, u_int, struct in_addr, u_int,
			       int, struct ifnet *));
void	in_pcbnotify __P((struct inpcbhead *, struct sockaddr *,
	    u_int, struct in_addr, u_int, int, void (*)(struct inpcb *, int)));
void	in_pcbrehash __P((struct inpcb *));
int	in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
int	in_setsockaddr __P((struct socket *so, struct sockaddr **nam));
void	in_pcbremlists __P((struct inpcb *inp));
int	prison_xinpcb __P((struct proc *p, struct inpcb *inp));
#endif /* _KERNEL */

#endif /* !_NETINET_IN_PCB_H_ */
OpenPOWER on IntegriCloud