FreeBSD/Linux Kernel Cross Reference
sys/netinet/udp_var.h
1 /*
2 * Copyright (c) 1982, 1986, 1989, 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 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: releng/5.1/sys/netinet/udp_var.h 98211 2002-06-14 08:35:21Z hsu $
35 */
36
37 #ifndef _NETINET_UDP_VAR_H_
38 #define _NETINET_UDP_VAR_H_
39
40 /*
41 * UDP kernel structures and variables.
42 */
43 struct udpiphdr {
44 struct ipovly ui_i; /* overlaid ip structure */
45 struct udphdr ui_u; /* udp header */
46 };
47 #define ui_x1 ui_i.ih_x1
48 #define ui_pr ui_i.ih_pr
49 #define ui_len ui_i.ih_len
50 #define ui_src ui_i.ih_src
51 #define ui_dst ui_i.ih_dst
52 #define ui_sport ui_u.uh_sport
53 #define ui_dport ui_u.uh_dport
54 #define ui_ulen ui_u.uh_ulen
55 #define ui_sum ui_u.uh_sum
56
57 struct udpstat {
58 /* input statistics: */
59 u_long udps_ipackets; /* total input packets */
60 u_long udps_hdrops; /* packet shorter than header */
61 u_long udps_badsum; /* checksum error */
62 u_long udps_nosum; /* no checksum */
63 u_long udps_badlen; /* data length larger than packet */
64 u_long udps_noport; /* no socket on port */
65 u_long udps_noportbcast; /* of above, arrived as broadcast */
66 u_long udps_fullsock; /* not delivered, input socket full */
67 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
68 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
69 /* output statistics: */
70 u_long udps_opackets; /* total output packets */
71 u_long udps_fastout; /* output packets on fast path */
72 /* of no socket on port, arrived as multicast */
73 u_long udps_noportmcast;
74 };
75
76 /*
77 * Names for UDP sysctl objects
78 */
79 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
80 #define UDPCTL_STATS 2 /* statistics (read-only) */
81 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
82 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
83 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
84 #define UDPCTL_MAXID 6
85
86 #define UDPCTL_NAMES { \
87 { 0, 0 }, \
88 { "checksum", CTLTYPE_INT }, \
89 { "stats", CTLTYPE_STRUCT }, \
90 { "maxdgram", CTLTYPE_INT }, \
91 { "recvspace", CTLTYPE_INT }, \
92 { "pcblist", CTLTYPE_STRUCT }, \
93 }
94
95 #ifdef _KERNEL
96 SYSCTL_DECL(_net_inet_udp);
97
98 extern struct pr_usrreqs udp_usrreqs;
99 extern struct inpcbhead udb;
100 extern struct inpcbinfo udbinfo;
101 extern u_long udp_sendspace;
102 extern u_long udp_recvspace;
103 extern struct udpstat udpstat;
104 extern int log_in_vain;
105
106 void udp_ctlinput(int, struct sockaddr *, void *);
107 void udp_init(void);
108 void udp_input(struct mbuf *, int);
109
110 struct inpcb *
111 udp_notify(struct inpcb *inp, int errno);
112 int udp_shutdown(struct socket *so);
113 #endif
114
115 #endif
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