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29 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
33 #ifndef _NETINET_UDP_VAR_H_
34 #define _NETINET_UDP_VAR_H_
37 * UDP kernel structures and variables.
40 struct ipovly ui_i; /* overlaid ip structure */
41 struct udphdr ui_u; /* udp header */
43 #define ui_x1 ui_i.ih_x1
44 #define ui_pr ui_i.ih_pr
45 #define ui_len ui_i.ih_len
46 #define ui_src ui_i.ih_src
47 #define ui_dst ui_i.ih_dst
48 #define ui_sport ui_u.uh_sport
49 #define ui_dport ui_u.uh_dport
50 #define ui_ulen ui_u.uh_ulen
51 #define ui_sum ui_u.uh_sum
54 /* input statistics: */
55 u_long udps_ipackets; /* total input packets */
56 u_long udps_hdrops; /* packet shorter than header */
57 u_long udps_badsum; /* checksum error */
58 u_long udps_nosum; /* no checksum */
59 u_long udps_badlen; /* data length larger than packet */
60 u_long udps_noport; /* no socket on port */
61 u_long udps_noportbcast; /* of above, arrived as broadcast */
62 u_long udps_fullsock; /* not delivered, input socket full */
63 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
64 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
65 /* output statistics: */
66 u_long udps_opackets; /* total output packets */
67 u_long udps_fastout; /* output packets on fast path */
68 /* of no socket on port, arrived as multicast */
69 u_long udps_noportmcast;
73 * Names for UDP sysctl objects
75 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
76 #define UDPCTL_STATS 2 /* statistics (read-only) */
77 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
78 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
79 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
80 #define UDPCTL_MAXID 6
82 #define UDPCTL_NAMES { \
84 { "checksum", CTLTYPE_INT }, \
85 { "stats", CTLTYPE_STRUCT }, \
86 { "maxdgram", CTLTYPE_INT }, \
87 { "recvspace", CTLTYPE_INT }, \
88 { "pcblist", CTLTYPE_STRUCT }, \
92 SYSCTL_DECL(_net_inet_udp);
94 extern struct pr_usrreqs udp_usrreqs;
95 extern struct inpcbhead udb;
96 extern struct inpcbinfo udbinfo;
97 extern u_long udp_sendspace;
98 extern u_long udp_recvspace;
99 extern struct udpstat udpstat;
100 extern int log_in_vain;
102 void udp_ctlinput(int, struct sockaddr *, void *);
104 void udp_input(struct mbuf *, int);
107 udp_notify(struct inpcb *inp, int errno);
108 int udp_shutdown(struct socket *so);