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