FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_pcb.h
1 /*
2 * Copyright (c) 1982, 1986, 1990, 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_pcb.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD$
35 */
36
37 #ifndef _NETINET_IN_PCB_H_
38 #define _NETINET_IN_PCB_H_
39
40 #include <sys/queue.h>
41
42 /*
43 * Common structure pcb for internet protocol implementation.
44 * Here are stored pointers to local and foreign host table
45 * entries, local and foreign socket numbers, and pointers
46 * up (to a socket structure) and down (to a protocol-specific)
47 * control block.
48 */
49 LIST_HEAD(inpcbhead, inpcb);
50 LIST_HEAD(inpcbporthead, inpcbport);
51 typedef u_quad_t inp_gen_t;
52
53 /*
54 * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
55 * of the structure. Therefore, it is important that the members in
56 * that position not contain any information which is required to be
57 * stable.
58 */
59 struct inpcb {
60 LIST_ENTRY(inpcb) inp_hash; /* hash list */
61 struct in_addr inp_faddr; /* foreign host table entry */
62 struct in_addr inp_laddr; /* local host table entry */
63 u_short inp_fport; /* foreign port */
64 u_short inp_lport; /* local port */
65 LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
66 caddr_t inp_ppcb; /* pointer to per-protocol pcb */
67 struct inpcbinfo *inp_pcbinfo; /* PCB list info */
68 struct socket *inp_socket; /* back pointer to socket */
69 struct mbuf *inp_options; /* IP options */
70 struct route inp_route; /* placeholder for routing entry */
71 int inp_flags; /* generic IP/datagram flags */
72 u_char inp_ip_tos; /* type of service proto */
73 u_char inp_ip_ttl; /* time to live proto */
74 u_char inp_ip_p; /* protocol proto */
75 u_char pad[1]; /* alignment */
76 struct ip_moptions *inp_moptions; /* IP multicast options */
77 LIST_ENTRY(inpcb) inp_portlist; /* list for this PCB's local port */
78 struct inpcbport *inp_phd; /* head of this list */
79 inp_gen_t inp_gencnt; /* generation count of this instance */
80 };
81 /*
82 * The range of the generation count, as used in this implementation,
83 * is 9e19. We would have to create 300 billion connections per
84 * second for this number to roll over in a year. This seems sufficiently
85 * unlikely that we simply don't concern ourselves with that possibility.
86 */
87
88 /*
89 * Interface exported to userland by various protocols which use
90 * inpcbs. Hack alert -- only define if struct xsocket is in scope.
91 */
92 #ifdef _SYS_SOCKETVAR_H_
93 struct xinpcb {
94 size_t xi_len; /* length of this structure */
95 struct inpcb xi_inp;
96 struct xsocket xi_socket;
97 u_quad_t xi_alignment_hack;
98 };
99
100 struct xinpgen {
101 size_t xig_len; /* length of this structure */
102 u_int xig_count; /* number of PCBs at this time */
103 inp_gen_t xig_gen; /* generation count at this time */
104 so_gen_t xig_sogen; /* socket generation count at this time */
105 };
106 #endif /* _SYS_SOCKETVAR_H_ */
107
108 struct inpcbport {
109 LIST_ENTRY(inpcbport) phd_hash;
110 struct inpcbhead phd_pcblist;
111 u_short phd_port;
112 };
113
114 struct inpcbinfo { /* XXX documentation, prefixes */
115 struct inpcbhead *hashbase;
116 u_long hashmask;
117 struct inpcbporthead *porthashbase;
118 u_long porthashmask;
119 struct inpcbhead *listhead;
120 u_short lastport;
121 u_short lastlow;
122 u_short lasthi;
123 struct vm_zone *ipi_zone; /* zone to allocate pcbs from */
124 u_int ipi_count; /* number of pcbs in this list */
125 u_quad_t ipi_gencnt; /* current generation count */
126 };
127
128 #define INP_PCBHASH(faddr, lport, fport, mask) \
129 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
130 #define INP_PCBPORTHASH(lport, mask) \
131 (ntohs((lport)) & (mask))
132
133 /* flags in inp_flags: */
134 #define INP_RECVOPTS 0x01 /* receive incoming IP options */
135 #define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
136 #define INP_RECVDSTADDR 0x04 /* receive IP dst address */
137 #define INP_HDRINCL 0x08 /* user supplies entire IP header */
138 #define INP_HIGHPORT 0x10 /* user wants "high" port binding */
139 #define INP_LOWPORT 0x20 /* user wants "low" port binding */
140 #define INP_ANONPORT 0x40 /* port chosen for user */
141 #define INP_RECVIF 0x80 /* receive incoming interface */
142 #define INP_MTUDISC 0x100 /* user can do MTU discovery */
143 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
144 INP_RECVIF)
145
146 #define INPLOOKUP_WILDCARD 1
147
148 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
149
150 #ifdef KERNEL
151 void in_losing __P((struct inpcb *));
152 void in_rtchange __P((struct inpcb *, int));
153 int in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
154 int in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
155 int in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
156 void in_pcbdetach __P((struct inpcb *));
157 void in_pcbdisconnect __P((struct inpcb *));
158 int in_pcbinshash __P((struct inpcb *));
159 int in_pcbladdr __P((struct inpcb *, struct sockaddr *,
160 struct sockaddr_in **));
161 struct inpcb *
162 in_pcblookup_local __P((struct inpcbinfo *,
163 struct in_addr, u_int, int));
164 struct inpcb *
165 in_pcblookup_hash __P((struct inpcbinfo *,
166 struct in_addr, u_int, struct in_addr, u_int, int));
167 void in_pcbnotify __P((struct inpcbhead *, struct sockaddr *,
168 u_int, struct in_addr, u_int, int, void (*)(struct inpcb *, int)));
169 void in_pcbnotifyall __P((struct inpcbhead *, struct sockaddr *,
170 int, void (*)(struct inpcb *, int)));
171 void in_pcbrehash __P((struct inpcb *));
172 int in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
173 int in_setsockaddr __P((struct socket *so, struct sockaddr **nam));
174 #endif /* KERNEL */
175
176 #endif /* !_NETINET_IN_PCB_H_ */
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