1 /* SPDX-License-Identifier: BSD-3-Clause */ 2 /* 3 * Copyright (c) 1982, 1986, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)udp.h 8.1 (Berkeley) 6/10/93 31 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp 32 */ 33 34 #ifndef UDP_H 35 #define UDP_H 36 37 #include "socket.h" 38 39 #define UDP_TTL 0x60 40 #define UDP_UDPDATALEN 16192 41 42 /* 43 * Udp protocol header. 44 * Per RFC 768, September, 1981. 45 */ 46 struct udphdr { 47 uint16_t uh_sport; /* source port */ 48 uint16_t uh_dport; /* destination port */ 49 int16_t uh_ulen; /* udp length */ 50 uint16_t uh_sum; /* udp checksum */ 51 }; 52 53 /* 54 * UDP kernel structures and variables. 55 */ 56 struct udpiphdr { 57 struct ipovly ui_i; /* overlaid ip structure */ 58 struct udphdr ui_u; /* udp header */ 59 }; 60 #define ui_mbuf ui_i.ih_mbuf.mptr 61 #define ui_x1 ui_i.ih_x1 62 #define ui_pr ui_i.ih_pr 63 #define ui_len ui_i.ih_len 64 #define ui_src ui_i.ih_src 65 #define ui_dst ui_i.ih_dst 66 #define ui_sport ui_u.uh_sport 67 #define ui_dport ui_u.uh_dport 68 #define ui_ulen ui_u.uh_ulen 69 #define ui_sum ui_u.uh_sum 70 71 /* 72 * Names for UDP sysctl objects 73 */ 74 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 75 #define UDPCTL_MAXID 2 76 77 struct mbuf; 78 79 void udp_init(Slirp *); 80 void udp_cleanup(Slirp *); 81 void udp_input(register struct mbuf *, int); 82 int udp_attach(struct socket *, unsigned short af); 83 void udp_detach(struct socket *); 84 struct socket *udp_listen(Slirp *, uint32_t, unsigned, uint32_t, unsigned, int); 85 struct socket *udpx_listen(Slirp *, 86 const struct sockaddr *haddr, socklen_t haddrlen, 87 const struct sockaddr *laddr, socklen_t laddrlen, 88 int flags); 89 int udp_output(struct socket *so, struct mbuf *m, struct sockaddr_in *saddr, 90 struct sockaddr_in *daddr, int iptos); 91 92 void udp6_input(register struct mbuf *); 93 int udp6_output(struct socket *so, struct mbuf *m, struct sockaddr_in6 *saddr, 94 struct sockaddr_in6 *daddr); 95 96 #endif 97