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 /* 40 * Udp protocol header. 41 * Per RFC 768, September, 1981. 42 */ 43 struct udphdr { 44 u_int16_t uh_sport; /* source port */ 45 u_int16_t uh_dport; /* destination port */ 46 int16_t uh_ulen; /* udp length */ 47 u_int16_t uh_sum; /* udp checksum */ 48 }; 49 50 /* 51 * UDP kernel structures and variables. 52 */ 53 struct udpiphdr { 54 struct ipovly ui_i; /* overlaid ip structure */ 55 struct udphdr ui_u; /* udp header */ 56 }; 57 #define ui_mbuf ui_i.ih_mbuf.mptr 58 #define ui_x1 ui_i.ih_x1 59 #define ui_pr ui_i.ih_pr 60 #define ui_len ui_i.ih_len 61 #define ui_src ui_i.ih_src 62 #define ui_dst ui_i.ih_dst 63 #define ui_sport ui_u.uh_sport 64 #define ui_dport ui_u.uh_dport 65 #define ui_ulen ui_u.uh_ulen 66 #define ui_sum ui_u.uh_sum 67 68 /* 69 * Names for UDP sysctl objects 70 */ 71 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 72 #define UDPCTL_MAXID 2 73 74 struct mbuf; 75 76 void udp_init(Slirp *); 77 void udp_input(register struct mbuf *, int); 78 int udp_output(struct socket *, struct mbuf *, struct sockaddr_in *); 79 int udp_attach(struct socket *); 80 void udp_detach(struct socket *); 81 struct socket * udp_listen(Slirp *, u_int32_t, u_int, u_int32_t, u_int, 82 int); 83 int udp_output2(struct socket *so, struct mbuf *m, 84 struct sockaddr_in *saddr, struct sockaddr_in *daddr, 85 int iptos); 86 #endif 87