1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)udp_var.h 8.1 (Berkeley) 06/10/93 8 */ 9 10 /* 11 * UDP kernel structures and variables. 12 */ 13 struct udpiphdr { 14 struct ipovly ui_i; /* overlaid ip structure */ 15 struct udphdr ui_u; /* udp header */ 16 }; 17 #define ui_next ui_i.ih_next 18 #define ui_prev ui_i.ih_prev 19 #define ui_x1 ui_i.ih_x1 20 #define ui_pr ui_i.ih_pr 21 #define ui_len ui_i.ih_len 22 #define ui_src ui_i.ih_src 23 #define ui_dst ui_i.ih_dst 24 #define ui_sport ui_u.uh_sport 25 #define ui_dport ui_u.uh_dport 26 #define ui_ulen ui_u.uh_ulen 27 #define ui_sum ui_u.uh_sum 28 29 struct udpstat { 30 /* input statistics: */ 31 u_long udps_ipackets; /* total input packets */ 32 u_long udps_hdrops; /* packet shorter than header */ 33 u_long udps_badsum; /* checksum error */ 34 u_long udps_badlen; /* data length larger than packet */ 35 u_long udps_noport; /* no socket on port */ 36 u_long udps_noportbcast; /* of above, arrived as broadcast */ 37 u_long udps_fullsock; /* not delivered, input socket full */ 38 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 39 /* output statistics: */ 40 u_long udps_opackets; /* total output packets */ 41 }; 42 43 /* 44 * Names for UDP sysctl objects 45 */ 46 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 47 #define UDPCTL_MAXID 2 48 49 #define UDPCTL_NAMES { \ 50 { 0, 0 }, \ 51 { "checksum", CTLTYPE_INT }, \ 52 } 53 54 #ifdef KERNEL 55 struct inpcb udb; 56 struct udpstat udpstat; 57 58 void udp_ctlinput __P((int, struct sockaddr *, struct ip *)); 59 void udp_init __P((void)); 60 void udp_input __P((struct mbuf *, int)); 61 int udp_output __P((struct inpcb *, 62 struct mbuf *, struct mbuf *, struct mbuf *)); 63 int udp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 64 int udp_usrreq __P((struct socket *, 65 int, struct mbuf *, struct mbuf *, struct mbuf *)); 66 #endif 67