slirp/udp.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)udp.h       8.1 (Berkeley) 6/10/93
  34  * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
  35  */
  36
  37 #ifndef _UDP_H_
  38 #define _UDP_H_
  39
  40 #define UDP_TTL 0x60
  41 #define UDP_UDPDATALEN 16192
  42
  43 extern struct socket *udp_last_so;
  44
  45 /*
  46  * Udp protocol header.
  47  * Per RFC 768, September, 1981.
  48  */
  49 struct udphdr {
  50         u_int16_t       uh_sport;               /* source port */
  51         u_int16_t       uh_dport;               /* destination port */
  52         int16_t uh_ulen;                /* udp length */
  53         u_int16_t       uh_sum;                 /* udp checksum */
  54 };
  55
  56 /*
  57  * UDP kernel structures and variables.
  58  */
  59 struct udpiphdr {
  60                 struct  ipovly ui_i;            /* overlaid ip structure */
  61                 struct  udphdr ui_u;            /* udp header */
  62 };
  63 #define ui_next         ui_i.ih_next
  64 #define ui_prev         ui_i.ih_prev
  65 #define ui_x1           ui_i.ih_x1
  66 #define ui_pr           ui_i.ih_pr
  67 #define ui_len          ui_i.ih_len
  68 #define ui_src          ui_i.ih_src
  69 #define ui_dst          ui_i.ih_dst
  70 #define ui_sport        ui_u.uh_sport
  71 #define ui_dport        ui_u.uh_dport
  72 #define ui_ulen         ui_u.uh_ulen
  73 #define ui_sum          ui_u.uh_sum
  74
  75 #ifdef LOG_ENABLED
  76 struct udpstat {
  77                                         /* input statistics: */
  78                 u_long  udps_ipackets;          /* total input packets */
  79                 u_long  udps_hdrops;            /* packet shorter than header */
  80                 u_long  udps_badsum;            /* checksum error */
  81                 u_long  udps_badlen;            /* data length larger than packet */
  82                 u_long  udps_noport;            /* no socket on port */
  83                 u_long  udps_noportbcast;       /* of above, arrived as broadcast */
  84                 u_long  udps_fullsock;          /* not delivered, input socket full */
  85                 u_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */
  86                                         /* output statistics: */
  87                 u_long  udps_opackets;          /* total output packets */
  88 };
  89 #endif
  90
  91 /*
  92  * Names for UDP sysctl objects
  93  */
  94 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
  95 #define UDPCTL_MAXID            2
  96
  97 #ifdef LOG_ENABLED
  98 extern struct udpstat udpstat;
  99 #endif
 100
 101 extern struct socket udb;
 102 struct mbuf;
 103
 104 void udp_init _P((void));
 105 void udp_input _P((register struct mbuf *, int));
 106 int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *));
 107 int udp_attach _P((struct socket *));
 108 void udp_detach _P((struct socket *));
 109 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int));
 110 int udp_output2(struct socket *so, struct mbuf *m,
 111                 struct sockaddr_in *saddr, struct sockaddr_in *daddr,
 112                 int iptos);
 113 #endif