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 #include "helper.h" 37 38 #define UDP_TTL 0x60 39 #define UDP_UDPDATALEN 16192 40 41 extern struct socket *udp_last_so; 42 43 /* 44 * Udp protocol header. 45 * Per RFC 768, September, 1981. 46 */ 47 struct udphdr { 48 port_t uh_sport; /* source port */ 49 port_t uh_dport; /* destination port */ 50 int16_t uh_ulen; /* udp length */ 51 u_int16_t uh_sum; /* udp checksum */ 52 }; 53 54 /* 55 * UDP kernel structures and variables. 56 */ 57 struct udpiphdr { 58 struct ipovly ui_i; /* overlaid ip structure */ 59 struct udphdr ui_u; /* udp header */ 60 }; 61 #define ui_mbuf ui_i.ih_mbuf.mptr 62 #define ui_x1 ui_i.ih_x1 63 #define ui_pr ui_i.ih_pr 64 #define ui_len ui_i.ih_len 65 #define ui_src ui_i.ih_src 66 #define ui_dst ui_i.ih_dst 67 #define ui_sport ui_u.uh_sport 68 #define ui_dport ui_u.uh_dport 69 #define ui_ulen ui_u.uh_ulen 70 #define ui_sum ui_u.uh_sum 71 72 struct udpstat { 73 /* input statistics: */ 74 u_long udps_ipackets; /* total input packets */ 75 u_long udps_hdrops; /* packet shorter than header */ 76 u_long udps_badsum; /* checksum error */ 77 u_long udps_badlen; /* data length larger than packet */ 78 u_long udps_noport; /* no socket on port */ 79 u_long udps_noportbcast; /* of above, arrived as broadcast */ 80 u_long udps_fullsock; /* not delivered, input socket full */ 81 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 82 /* output statistics: */ 83 u_long udps_opackets; /* total output packets */ 84 }; 85 86 /* 87 * Names for UDP sysctl objects 88 */ 89 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 90 #define UDPCTL_MAXID 2 91 92 extern struct udpstat udpstat; 93 94 extern struct socket udb; 95 struct mbuf; 96 97 void udp_init _P((void)); 98 void udp_input _P((register struct mbuf *, int)); 99 int udp_output_ _P((struct socket *, struct mbuf *, SockAddress *)); 100 int udp_attach _P((struct socket *)); 101 void udp_detach _P((struct socket *)); 102 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int)); 103 int udp_unlisten _P((u_int)); 104 105 int udp_output2_(struct socket *so, struct mbuf *m, 106 const SockAddress *saddr, const SockAddress *daddr, 107 int iptos); 108 #endif 109