| 1 | /*
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| 2 | * Copyright (c) 1982, 1986, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. All advertising materials mentioning features or use of this software
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| 14 | * must display the following acknowledgement:
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| 15 | * This product includes software developed by the University of
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| 16 | * California, Berkeley and its contributors.
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| 17 | * 4. Neither the name of the University nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | *
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| 33 | * @(#)udp.h 8.1 (Berkeley) 6/10/93
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| 34 | * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
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| 35 | */
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| 36 |
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| 37 | #ifndef _UDP_H_
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| 38 | #define _UDP_H_
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| 39 |
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| 40 | #define UDP_TTL 0x60
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| 41 | #define UDP_UDPDATALEN 16192
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| 42 |
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| 43 | extern struct socket *udp_last_so;
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| 44 |
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| 45 | /*
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| 46 | * Udp protocol header.
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| 47 | * Per RFC 768, September, 1981.
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| 48 | */
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| 49 | struct udphdr {
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| 50 | u_int16_t uh_sport; /* source port */
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| 51 | u_int16_t uh_dport; /* destination port */
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| 52 | int16_t uh_ulen; /* udp length */
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| 53 | u_int16_t uh_sum; /* udp checksum */
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| 54 | };
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| 55 |
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| 56 | /*
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| 57 | * UDP kernel structures and variables.
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| 58 | */
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| 59 | struct udpiphdr {
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| 60 | struct ipovly ui_i; /* overlaid ip structure */
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| 61 | struct udphdr ui_u; /* udp header */
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| 62 | };
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| 63 | #define ui_next ui_i.ih_next
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| 64 | #define ui_prev ui_i.ih_prev
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| 65 | #define ui_x1 ui_i.ih_x1
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| 66 | #define ui_pr ui_i.ih_pr
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| 67 | #define ui_len ui_i.ih_len
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| 68 | #define ui_src ui_i.ih_src
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| 69 | #define ui_dst ui_i.ih_dst
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| 70 | #define ui_sport ui_u.uh_sport
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| 71 | #define ui_dport ui_u.uh_dport
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| 72 | #define ui_ulen ui_u.uh_ulen
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| 73 | #define ui_sum ui_u.uh_sum
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| 74 |
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| 75 | struct udpstat_t {
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| 76 | /* input statistics: */
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| 77 | u_long udps_ipackets; /* total input packets */
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| 78 | u_long udps_hdrops; /* packet shorter than header */
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| 79 | u_long udps_badsum; /* checksum error */
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| 80 | u_long udps_badlen; /* data length larger than packet */
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| 81 | u_long udps_noport; /* no socket on port */
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| 82 | u_long udps_noportbcast; /* of above, arrived as broadcast */
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| 83 | u_long udps_fullsock; /* not delivered, input socket full */
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| 84 | u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
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| 85 | /* output statistics: */
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| 86 | u_long udps_opackets; /* total output packets */
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| 87 | };
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| 88 |
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| 89 | /*
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| 90 | * Names for UDP sysctl objects
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| 91 | */
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| 92 | #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
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| 93 | #define UDPCTL_MAXID 2
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| 94 |
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| 95 | extern struct udpstat udpstat;
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| 96 | extern struct socket udb;
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| 97 | struct mbuf;
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| 98 |
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| 99 | void udp_init _P((PNATState));
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| 100 | void udp_input _P((PNATState, register struct mbuf *, int));
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| 101 | int udp_output _P((PNATState, struct socket *, struct mbuf *, struct sockaddr_in *));
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| 102 | int udp_attach _P((PNATState, struct socket *));
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| 103 | void udp_detach _P((PNATState, struct socket *));
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| 104 | u_int8_t udp_tos _P((struct socket *));
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| 105 | void udp_emu _P((PNATState, struct socket *, struct mbuf *));
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| 106 | struct socket * udp_listen _P((PNATState, u_int, u_int32_t, u_int, int));
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| 107 | int udp_output2(PNATState pData, struct socket *so, struct mbuf *m,
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| 108 | struct sockaddr_in *saddr, struct sockaddr_in *daddr,
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| 109 | int iptos);
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| 110 |
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| 111 | #endif
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