usr/src/sys/netinet/udp_var.h

/*
 * Copyright (c) 1982 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)udp_var.h   6.4 (Berkeley) %G%
 */

/*
 * UDP kernel structures and variables.
 */
struct  udpiphdr {
        struct  ipovly ui_i;            /* overlaid ip structure */
        struct  udphdr ui_u;            /* udp header */
};
#define ui_next         ui_i.ih_next
#define ui_prev         ui_i.ih_prev
#define ui_x1           ui_i.ih_x1
#define ui_pr           ui_i.ih_pr
#define ui_len          ui_i.ih_len
#define ui_src          ui_i.ih_src
#define ui_dst          ui_i.ih_dst
#define ui_sport        ui_u.uh_sport
#define ui_dport        ui_u.uh_dport
#define ui_ulen         ui_u.uh_ulen
#define ui_sum          ui_u.uh_sum

struct  udpstat {
        int     udps_hdrops;
        int     udps_badsum;
        int     udps_badlen;
};

#define UDP_TTL         30              /* time to live for UDP packets */

#ifdef KERNEL
struct  inpcb udb;
struct  udpstat udpstat;
#endif