1 //==========================================================================
3 // include/netinet/udp_var.h
5 //==========================================================================
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15 // Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
17 // -------------------------------------------
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20 //==========================================================================
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54 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
55 * $FreeBSD: src/sys/netinet/udp_var.h,v 1.22.2.1 2001/02/18 07:12:25 luigi Exp $
58 #ifndef _NETINET_UDP_VAR_H_
59 #define _NETINET_UDP_VAR_H_
62 * UDP kernel structures and variables.
65 struct ipovly ui_i; /* overlaid ip structure */
66 struct udphdr ui_u; /* udp header */
68 #define ui_x1 ui_i.ih_x1
69 #define ui_pr ui_i.ih_pr
70 #define ui_len ui_i.ih_len
71 #define ui_src ui_i.ih_src
72 #define ui_dst ui_i.ih_dst
73 #define ui_sport ui_u.uh_sport
74 #define ui_dport ui_u.uh_dport
75 #define ui_ulen ui_u.uh_ulen
76 #define ui_sum ui_u.uh_sum
79 /* input statistics: */
80 u_long udps_ipackets; /* total input packets */
81 u_long udps_hdrops; /* packet shorter than header */
82 u_long udps_badsum; /* checksum error */
83 u_long udps_nosum; /* no checksum */
84 u_long udps_badlen; /* data length larger than packet */
85 u_long udps_noport; /* no socket on port */
86 u_long udps_noportbcast; /* of above, arrived as broadcast */
87 u_long udps_fullsock; /* not delivered, input socket full */
88 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
89 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
90 /* output statistics: */
91 u_long udps_opackets; /* total output packets */
92 u_long udps_fastout; /* output packets on fast path */
93 /* of no socket on port, arrived as multicast */
94 u_long udps_noportmcast;
98 * Names for UDP sysctl objects
100 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
101 #define UDPCTL_STATS 2 /* statistics (read-only) */
102 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
103 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
104 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
105 #define UDPCTL_MAXID 6
107 #define UDPCTL_NAMES { \
109 { "checksum", CTLTYPE_INT }, \
110 { "stats", CTLTYPE_STRUCT }, \
111 { "maxdgram", CTLTYPE_INT }, \
112 { "recvspace", CTLTYPE_INT }, \
113 { "pcblist", CTLTYPE_STRUCT }, \
117 SYSCTL_DECL(_net_inet_udp);
119 extern struct pr_usrreqs udp_usrreqs;
120 extern struct inpcbhead udb;
121 extern struct inpcbinfo udbinfo;
122 extern u_long udp_sendspace;
123 extern u_long udp_recvspace;
124 extern struct udpstat udpstat;
125 extern int log_in_vain;
127 void udp_ctlinput __P((int, struct sockaddr *, void *));
128 void udp_init __P((void));
129 void udp_input __P((struct mbuf *, int));
131 void udp_notify __P((struct inpcb *inp, int _errno));
132 int udp_shutdown __P((struct socket *so));