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.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
31 * $FreeBSD$
32 */
33
34 #ifndef _NETINET_UDP_VAR_H_
35 #define _NETINET_UDP_VAR_H_
36
37 /*
38 * UDP kernel structures and variables.
39 */
40 struct udpiphdr {
41 struct ipovly ui_i; /* overlaid ip structure */
42 struct udphdr ui_u; /* udp header */
43 };
44 #define ui_x1 ui_i.ih_x1
45 #define ui_pr ui_i.ih_pr
46 #define ui_len ui_i.ih_len
47 #define ui_src ui_i.ih_src
48 #define ui_dst ui_i.ih_dst
49 #define ui_sport ui_u.uh_sport
50 #define ui_dport ui_u.uh_dport
51 #define ui_ulen ui_u.uh_ulen
52 #define ui_sum ui_u.uh_sum
53
54 /*
55 * UDP control block; one per udp.
56 */
57 struct udpcb {
58 void *u_pspare;
59 u_int u_flags; /* Generic UDP flags. */
60 };
61
62 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
63 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
64
65 struct udpstat {
66 /* input statistics: */
67 u_long udps_ipackets; /* total input packets */
68 u_long udps_hdrops; /* packet shorter than header */
69 u_long udps_badsum; /* checksum error */
70 u_long udps_nosum; /* no checksum */
71 u_long udps_badlen; /* data length larger than packet */
72 u_long udps_noport; /* no socket on port */
73 u_long udps_noportbcast; /* of above, arrived as broadcast */
74 u_long udps_fullsock; /* not delivered, input socket full */
75 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
76 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
77 /* output statistics: */
78 u_long udps_opackets; /* total output packets */
79 u_long udps_fastout; /* output packets on fast path */
80 /* of no socket on port, arrived as multicast */
81 u_long udps_noportmcast;
82 u_long udps_filtermcast; /* blocked by multicast filter */
83 };
84
85 /*
86 * Names for UDP sysctl objects.
87 */
88 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
89 #define UDPCTL_STATS 2 /* statistics (read-only) */
90 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
91 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
92 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
93 #define UDPCTL_MAXID 6
94
95 #define UDPCTL_NAMES { \
96 { 0, 0 }, \
97 { "checksum", CTLTYPE_INT }, \
98 { "stats", CTLTYPE_STRUCT }, \
99 { "maxdgram", CTLTYPE_INT }, \
100 { "recvspace", CTLTYPE_INT }, \
101 { "pcblist", CTLTYPE_STRUCT }, \
102 }
103
104 #ifdef _KERNEL
105 SYSCTL_DECL(_net_inet_udp);
106
107 extern struct pr_usrreqs udp_usrreqs;
108 extern struct inpcbhead udb;
109 extern struct inpcbinfo udbinfo;
110 extern u_long udp_sendspace;
111 extern u_long udp_recvspace;
112 extern struct udpstat udpstat;
113 extern int udp_blackhole;
114 extern int udp_log_in_vain;
115
116 int udp_newudpcb(struct inpcb *);
117 void udp_discardcb(struct udpcb *);
118
119 void udp_ctlinput(int, struct sockaddr *, void *);
120 void udp_init(void);
121 void udp_input(struct mbuf *, int);
122 struct inpcb *udp_notify(struct inpcb *inp, int errno);
123 int udp_shutdown(struct socket *so);
124 #endif
125
126 #endif
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